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- -class Txt2ImgIterableBaseDataset(IterableDataset): - ''' - Define an interface to make the IterableDatasets for text2img data chainable - ''' - def __init__(self, num_records=0, valid_ids=None, size=256): - super().__init__() - self.num_records = num_records - self.valid_ids = valid_ids - self.sample_ids = valid_ids - self.size = size - - print(f'{self.__class__.__name__} dataset contains {self.__len__()} examples.') - - def __len__(self): - return self.num_records - - @abstractmethod - def __iter__(self): - pass \ No newline at end of file diff --git a/ldm/data/image_dresscode.py b/ldm/data/image_dresscode.py deleted file mode 100644 index ce468455979b70c421f47d6ad950bd32ec855fc1..0000000000000000000000000000000000000000 --- a/ldm/data/image_dresscode.py +++ /dev/null @@ -1,86 +0,0 @@ -import os -import torch -import torchvision -import torch.utils.data as data -import torchvision.transforms.functional as F -import numpy as np -from PIL import Image - -class OpenImageDataset(data.Dataset): - def __init__(self, state, dataset_dir, type="paired"): - self.state = state # train or test - self.dataset_dir = dataset_dir # /home/sd/zjh/Dataset/DressCode - - # 确定状态 - if state == "train": - self.dataset_file = os.path.join(dataset_dir, "train_pairs.txt") - if state == "test": - if type == "unpaired": - self.dataset_file = os.path.join(dataset_dir, "test_pairs_unpaired.txt") - if type == "paired": - self.dataset_file = os.path.join(dataset_dir, "test_pairs_paired.txt") - - # 加载数据集 - self.people_list = [] - self.clothes_list = [] - with open(self.dataset_file, 'r') as f: - for line in f.readlines(): - people, clothes, category = line.strip().split() - if category == "0": - category = "upper_body" - elif category == "1": - category = "lower_body" - elif category == "2": - category = "dresses" - people_path = os.path.join(self.dataset_dir, category, "images", people) - clothes_path = os.path.join(self.dataset_dir, category, "images", clothes) - self.people_list.append(people_path) - self.clothes_list.append(clothes_path) - - - def __len__(self): - return len(self.people_list) - - def __getitem__(self, index): - people_path = self.people_list[index] - # /home/sd/zjh/Dataset/DressCode/upper_body/images/000000_0.jpg - clothes_path = self.clothes_list[index] - # /home/sd/zjh/Dataset/DressCode/upper_body/images/000000_1.jpg - dense_path = people_path.replace("images", "dense")[:-5] + "5_uv.npz" - # /home/sd/zjh/Dataset/DressCode/upper_body/dense/000000_5_uv.npz - mask_path = people_path.replace("images", "mask")[:-3] + "png" - # /home/sd/Harddisk/zjh/DressCode/upper_body/mask/000000_0.png - - # 加载图像 - img = Image.open(people_path).convert("RGB").resize((512, 512)) - img = torchvision.transforms.ToTensor()(img) - refernce = Image.open(clothes_path).convert("RGB").resize((224, 224)) - refernce = torchvision.transforms.ToTensor()(refernce) - mask = Image.open(mask_path).convert("L").resize((512, 512)) - mask = torchvision.transforms.ToTensor()(mask) - mask = 1-mask - densepose = np.load(dense_path) - densepose = torch.from_numpy(densepose['uv']) - densepose = torch.nn.functional.interpolate(densepose.unsqueeze(0), size=(512, 512), mode='bilinear', align_corners=True).squeeze(0) - - # 正则化 - img = torchvision.transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))(img) - refernce = torchvision.transforms.Normalize((0.48145466, 0.4578275, 0.40821073), - (0.26862954, 0.26130258, 0.27577711))(refernce) - # densepose = torchvision.transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))(densepose) - - # 生成 inpaint 和 hint - inpaint = img * mask - hint = torchvision.transforms.Resize((512, 512))(refernce) - hint = torch.cat((hint,densepose),dim = 0) - - - return {"GT": img, # [3, 512, 512] - "inpaint_image": inpaint, # [3, 512, 512] - "inpaint_mask": mask, # [1, 512, 512] - "ref_imgs": refernce, # [3, 224, 224] - "hint": hint # [5, 512, 512] - } - - - \ No newline at end of file diff --git a/ldm/data/image_vitonhd.py b/ldm/data/image_vitonhd.py deleted file mode 100644 index f3591f07a14b6e82e615b3ae599ce89fac9711ec..0000000000000000000000000000000000000000 --- a/ldm/data/image_vitonhd.py +++ /dev/null @@ -1,75 +0,0 @@ -import os -import torch -import torchvision -import torch.utils.data as data -import torchvision.transforms.functional as F -from PIL import Image - -class OpenImageDataset(data.Dataset): - def __init__(self, state, dataset_dir, type="paired"): - self.state=state - self.dataset_dir = dataset_dir - self.dataset_list = [] - - if state == "train": - self.dataset_file = os.path.join(dataset_dir, "train_pairs.txt") - with open(self.dataset_file, 'r') as f: - for line in f.readlines(): - person, garment = line.strip().split() - self.dataset_list.append([person, person]) - - if state == "test": - self.dataset_file = os.path.join(dataset_dir, "test_pairs.txt") - if type == "unpaired": - with open(self.dataset_file, 'r') as f: - for line in f.readlines(): - person, garment = line.strip().split() - self.dataset_list.append([person, garment]) - - if type == "paired": - with open(self.dataset_file, 'r') as f: - for line in f.readlines(): - person, garment = line.strip().split() - self.dataset_list.append([person, person]) - - def __len__(self): - return len(self.dataset_list) - - def __getitem__(self, index): - - person, garment = self.dataset_list[index] - - # 确定路径 - img_path = os.path.join(self.dataset_dir, self.state, "image", person) - reference_path = os.path.join(self.dataset_dir, self.state, "cloth", garment) - mask_path = os.path.join(self.dataset_dir, self.state, "mask", person[:-4]+".png") - densepose_path = os.path.join(self.dataset_dir, self.state, "image-densepose", person) - - # 加载图像 - img = Image.open(img_path).convert("RGB").resize((512, 512)) - img = torchvision.transforms.ToTensor()(img) - refernce = Image.open(reference_path).convert("RGB").resize((224, 224)) - refernce = torchvision.transforms.ToTensor()(refernce) - mask = Image.open(mask_path).convert("L").resize((512, 512)) - mask = torchvision.transforms.ToTensor()(mask) - mask = 1-mask - densepose = Image.open(densepose_path).convert("RGB").resize((512, 512)) - densepose = torchvision.transforms.ToTensor()(densepose) - - # 正则化 - img = torchvision.transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))(img) - refernce = torchvision.transforms.Normalize((0.48145466, 0.4578275, 0.40821073), - (0.26862954, 0.26130258, 0.27577711))(refernce) - densepose = torchvision.transforms.Normalize((0.5, 0.5, 0.5), (0.5, 0.5, 0.5))(densepose) - - # 生成 inpaint 和 hint - inpaint = img * mask - hint = torchvision.transforms.Resize((512, 512))(refernce) - hint = torch.cat((hint,densepose),dim = 0) - - return {"GT": img, # [3, 512, 512] - "inpaint_image": inpaint, # [3, 512, 512] - "inpaint_mask": mask, # [1, 512, 512] - "ref_imgs": refernce, # [3, 224, 224] - "hint": hint, # [6, 512, 512] - } \ No newline at end of file diff --git a/ldm/data/imagenet.py b/ldm/data/imagenet.py deleted file mode 100644 index 56d9fe26245117c52a603bf30e30f4d2d6687f60..0000000000000000000000000000000000000000 --- a/ldm/data/imagenet.py +++ /dev/null @@ -1,394 +0,0 @@ -import os, yaml, pickle, shutil, tarfile, glob -import cv2 -import albumentations -import PIL -import numpy as np -import torchvision.transforms.functional as TF -from omegaconf import OmegaConf -from functools import partial -from PIL import Image -from tqdm import tqdm -from torch.utils.data import Dataset, Subset - -import taming.data.utils as tdu -from taming.data.imagenet import str_to_indices, give_synsets_from_indices, download, retrieve -from taming.data.imagenet import ImagePaths - -from ldm.modules.image_degradation import degradation_fn_bsr, degradation_fn_bsr_light - - -def synset2idx(path_to_yaml="data/index_synset.yaml"): - with open(path_to_yaml) as f: - di2s = yaml.load(f) - return dict((v,k) for k,v in di2s.items()) - - -class ImageNetBase(Dataset): - def __init__(self, config=None): - self.config = config or OmegaConf.create() - if not type(self.config)==dict: - self.config = OmegaConf.to_container(self.config) - self.keep_orig_class_label = self.config.get("keep_orig_class_label", False) - self.process_images = True # if False we skip loading & processing images and self.data contains filepaths - self._prepare() - self._prepare_synset_to_human() - self._prepare_idx_to_synset() - self._prepare_human_to_integer_label() - self._load() - - def __len__(self): - return len(self.data) - - def __getitem__(self, i): - return self.data[i] - - def _prepare(self): - raise NotImplementedError() - - def _filter_relpaths(self, relpaths): - ignore = set([ - "n06596364_9591.JPEG", - ]) - relpaths = [rpath for rpath in relpaths if not rpath.split("/")[-1] in ignore] - if "sub_indices" in self.config: - indices = str_to_indices(self.config["sub_indices"]) - synsets = give_synsets_from_indices(indices, path_to_yaml=self.idx2syn) # returns a list of strings - self.synset2idx = synset2idx(path_to_yaml=self.idx2syn) - files = [] - for rpath in relpaths: - syn = rpath.split("/")[0] - if syn in synsets: - files.append(rpath) - return files - else: - return relpaths - - def _prepare_synset_to_human(self): - SIZE = 2655750 - URL = "https://heibox.uni-heidelberg.de/f/9f28e956cd304264bb82/?dl=1" - self.human_dict = os.path.join(self.root, "synset_human.txt") - if (not os.path.exists(self.human_dict) or - not os.path.getsize(self.human_dict)==SIZE): - download(URL, self.human_dict) - - def _prepare_idx_to_synset(self): - URL = "https://heibox.uni-heidelberg.de/f/d835d5b6ceda4d3aa910/?dl=1" - self.idx2syn = os.path.join(self.root, "index_synset.yaml") - if (not os.path.exists(self.idx2syn)): - download(URL, self.idx2syn) - - def _prepare_human_to_integer_label(self): - URL = "https://heibox.uni-heidelberg.de/f/2362b797d5be43b883f6/?dl=1" - self.human2integer = os.path.join(self.root, "imagenet1000_clsidx_to_labels.txt") - if (not os.path.exists(self.human2integer)): - download(URL, self.human2integer) - with open(self.human2integer, "r") as f: - lines = f.read().splitlines() - assert len(lines) == 1000 - self.human2integer_dict = dict() - for line in lines: - value, key = line.split(":") - self.human2integer_dict[key] = int(value) - - def _load(self): - with open(self.txt_filelist, "r") as f: - self.relpaths = f.read().splitlines() - l1 = len(self.relpaths) - self.relpaths = self._filter_relpaths(self.relpaths) - print("Removed {} files from filelist during filtering.".format(l1 - len(self.relpaths))) - - self.synsets = [p.split("/")[0] for p in self.relpaths] - self.abspaths = [os.path.join(self.datadir, p) for p in self.relpaths] - - unique_synsets = np.unique(self.synsets) - class_dict = dict((synset, i) for i, synset in enumerate(unique_synsets)) - if not self.keep_orig_class_label: - self.class_labels = [class_dict[s] for s in self.synsets] - else: - self.class_labels = [self.synset2idx[s] for s in self.synsets] - - with open(self.human_dict, "r") as f: - human_dict = f.read().splitlines() - human_dict = dict(line.split(maxsplit=1) for line in human_dict) - - self.human_labels = [human_dict[s] for s in self.synsets] - - labels = { - "relpath": np.array(self.relpaths), - "synsets": np.array(self.synsets), - "class_label": np.array(self.class_labels), - "human_label": np.array(self.human_labels), - } - - if self.process_images: - self.size = retrieve(self.config, "size", default=256) - self.data = ImagePaths(self.abspaths, - labels=labels, - size=self.size, - random_crop=self.random_crop, - ) - else: - self.data = self.abspaths - - -class ImageNetTrain(ImageNetBase): - NAME = "ILSVRC2012_train" - URL = "http://www.image-net.org/challenges/LSVRC/2012/" - AT_HASH = "a306397ccf9c2ead27155983c254227c0fd938e2" - FILES = [ - "ILSVRC2012_img_train.tar", - ] - SIZES = [ - 147897477120, - ] - - def __init__(self, process_images=True, data_root=None, **kwargs): - self.process_images = process_images - self.data_root = data_root - super().__init__(**kwargs) - - def _prepare(self): - if self.data_root: - self.root = os.path.join(self.data_root, self.NAME) - else: - cachedir = os.environ.get("XDG_CACHE_HOME", os.path.expanduser("~/.cache")) - self.root = os.path.join(cachedir, "autoencoders/data", self.NAME) - - self.datadir = os.path.join(self.root, "data") - self.txt_filelist = os.path.join(self.root, "filelist.txt") - self.expected_length = 1281167 - self.random_crop = retrieve(self.config, "ImageNetTrain/random_crop", - default=True) - if not tdu.is_prepared(self.root): - # prep - print("Preparing dataset {} in {}".format(self.NAME, self.root)) - - datadir = self.datadir - if not os.path.exists(datadir): - path = os.path.join(self.root, self.FILES[0]) - if not os.path.exists(path) or not os.path.getsize(path)==self.SIZES[0]: - import academictorrents as at - atpath = at.get(self.AT_HASH, datastore=self.root) - assert atpath == path - - print("Extracting {} to {}".format(path, datadir)) - os.makedirs(datadir, exist_ok=True) - with tarfile.open(path, "r:") as tar: - tar.extractall(path=datadir) - - print("Extracting sub-tars.") - subpaths = sorted(glob.glob(os.path.join(datadir, "*.tar"))) - for subpath in tqdm(subpaths): - subdir = subpath[:-len(".tar")] - os.makedirs(subdir, exist_ok=True) - with tarfile.open(subpath, "r:") as tar: - tar.extractall(path=subdir) - - filelist = glob.glob(os.path.join(datadir, "**", "*.JPEG")) - filelist = [os.path.relpath(p, start=datadir) for p in filelist] - filelist = sorted(filelist) - filelist = "\n".join(filelist)+"\n" - with open(self.txt_filelist, "w") as f: - f.write(filelist) - - tdu.mark_prepared(self.root) - - -class ImageNetValidation(ImageNetBase): - NAME = "ILSVRC2012_validation" - URL = "http://www.image-net.org/challenges/LSVRC/2012/" - AT_HASH = "5d6d0df7ed81efd49ca99ea4737e0ae5e3a5f2e5" - VS_URL = "https://heibox.uni-heidelberg.de/f/3e0f6e9c624e45f2bd73/?dl=1" - FILES = [ - "ILSVRC2012_img_val.tar", - "validation_synset.txt", - ] - SIZES = [ - 6744924160, - 1950000, - ] - - def __init__(self, process_images=True, data_root=None, **kwargs): - self.data_root = data_root - self.process_images = process_images - super().__init__(**kwargs) - - def _prepare(self): - if self.data_root: - self.root = os.path.join(self.data_root, self.NAME) - else: - cachedir = os.environ.get("XDG_CACHE_HOME", os.path.expanduser("~/.cache")) - self.root = os.path.join(cachedir, "autoencoders/data", self.NAME) - self.datadir = os.path.join(self.root, "data") - self.txt_filelist = os.path.join(self.root, "filelist.txt") - self.expected_length = 50000 - self.random_crop = retrieve(self.config, "ImageNetValidation/random_crop", - default=False) - if not tdu.is_prepared(self.root): - # prep - print("Preparing dataset {} in {}".format(self.NAME, self.root)) - - datadir = self.datadir - if not os.path.exists(datadir): - path = os.path.join(self.root, self.FILES[0]) - if not os.path.exists(path) or not os.path.getsize(path)==self.SIZES[0]: - import academictorrents as at - atpath = at.get(self.AT_HASH, datastore=self.root) - assert atpath == path - - print("Extracting {} to {}".format(path, datadir)) - os.makedirs(datadir, exist_ok=True) - with tarfile.open(path, "r:") as tar: - tar.extractall(path=datadir) - - vspath = os.path.join(self.root, self.FILES[1]) - if not os.path.exists(vspath) or not os.path.getsize(vspath)==self.SIZES[1]: - download(self.VS_URL, vspath) - - with open(vspath, "r") as f: - synset_dict = f.read().splitlines() - synset_dict = dict(line.split() for line in synset_dict) - - print("Reorganizing into synset folders") - synsets = np.unique(list(synset_dict.values())) - for s in synsets: - os.makedirs(os.path.join(datadir, s), exist_ok=True) - for k, v in synset_dict.items(): - src = os.path.join(datadir, k) - dst = os.path.join(datadir, v) - shutil.move(src, dst) - - filelist = glob.glob(os.path.join(datadir, "**", "*.JPEG")) - filelist = [os.path.relpath(p, start=datadir) for p in filelist] - filelist = sorted(filelist) - filelist = "\n".join(filelist)+"\n" - with open(self.txt_filelist, "w") as f: - f.write(filelist) - - tdu.mark_prepared(self.root) - - - -class ImageNetSR(Dataset): - def __init__(self, size=None, - degradation=None, downscale_f=4, min_crop_f=0.5, max_crop_f=1., - random_crop=True): - """ - Imagenet Superresolution Dataloader - Performs following ops in order: - 1. crops a crop of size s from image either as random or center crop - 2. resizes crop to size with cv2.area_interpolation - 3. degrades resized crop with degradation_fn - - :param size: resizing to size after cropping - :param degradation: degradation_fn, e.g. cv_bicubic or bsrgan_light - :param downscale_f: Low Resolution Downsample factor - :param min_crop_f: determines crop size s, - where s = c * min_img_side_len with c sampled from interval (min_crop_f, max_crop_f) - :param max_crop_f: "" - :param data_root: - :param random_crop: - """ - self.base = self.get_base() - assert size - assert (size / downscale_f).is_integer() - self.size = size - self.LR_size = int(size / downscale_f) - self.min_crop_f = min_crop_f - self.max_crop_f = max_crop_f - assert(max_crop_f <= 1.) - self.center_crop = not random_crop - - self.image_rescaler = albumentations.SmallestMaxSize(max_size=size, interpolation=cv2.INTER_AREA) - - self.pil_interpolation = False # gets reset later if incase interp_op is from pillow - - if degradation == "bsrgan": - self.degradation_process = partial(degradation_fn_bsr, sf=downscale_f) - - elif degradation == "bsrgan_light": - self.degradation_process = partial(degradation_fn_bsr_light, sf=downscale_f) - - else: - interpolation_fn = { - "cv_nearest": cv2.INTER_NEAREST, - "cv_bilinear": cv2.INTER_LINEAR, - "cv_bicubic": cv2.INTER_CUBIC, - "cv_area": cv2.INTER_AREA, - "cv_lanczos": cv2.INTER_LANCZOS4, - "pil_nearest": PIL.Image.NEAREST, - "pil_bilinear": PIL.Image.BILINEAR, - "pil_bicubic": PIL.Image.BICUBIC, - "pil_box": PIL.Image.BOX, - "pil_hamming": PIL.Image.HAMMING, - "pil_lanczos": PIL.Image.LANCZOS, - }[degradation] - - self.pil_interpolation = degradation.startswith("pil_") - - if self.pil_interpolation: - self.degradation_process = partial(TF.resize, size=self.LR_size, interpolation=interpolation_fn) - - else: - self.degradation_process = albumentations.SmallestMaxSize(max_size=self.LR_size, - interpolation=interpolation_fn) - - def __len__(self): - return len(self.base) - - def __getitem__(self, i): - example = self.base[i] - image = Image.open(example["file_path_"]) - - if not image.mode == "RGB": - image = image.convert("RGB") - - image = np.array(image).astype(np.uint8) - - min_side_len = min(image.shape[:2]) - crop_side_len = min_side_len * np.random.uniform(self.min_crop_f, self.max_crop_f, size=None) - crop_side_len = int(crop_side_len) - - if self.center_crop: - self.cropper = albumentations.CenterCrop(height=crop_side_len, width=crop_side_len) - - else: - self.cropper = albumentations.RandomCrop(height=crop_side_len, width=crop_side_len) - - image = self.cropper(image=image)["image"] - image = self.image_rescaler(image=image)["image"] - - if self.pil_interpolation: - image_pil = PIL.Image.fromarray(image) - LR_image = self.degradation_process(image_pil) - LR_image = np.array(LR_image).astype(np.uint8) - - else: - LR_image = self.degradation_process(image=image)["image"] - - example["image"] = (image/127.5 - 1.0).astype(np.float32) - example["LR_image"] = (LR_image/127.5 - 1.0).astype(np.float32) - - return example - - -class ImageNetSRTrain(ImageNetSR): - def __init__(self, **kwargs): - super().__init__(**kwargs) - - def get_base(self): - with open("data/imagenet_train_hr_indices.p", "rb") as f: - indices = pickle.load(f) - dset = ImageNetTrain(process_images=False,) - return Subset(dset, indices) - - -class ImageNetSRValidation(ImageNetSR): - def __init__(self, **kwargs): - super().__init__(**kwargs) - - def get_base(self): - with open("data/imagenet_val_hr_indices.p", "rb") as f: - indices = pickle.load(f) - dset = ImageNetValidation(process_images=False,) - return Subset(dset, indices) diff --git a/ldm/data/lsun.py b/ldm/data/lsun.py deleted file mode 100644 index 593bedc6e6fccf1d096f589315c23cacd6b97e62..0000000000000000000000000000000000000000 --- a/ldm/data/lsun.py +++ /dev/null @@ -1,92 +0,0 @@ -import os -import numpy as np -import PIL -from PIL import Image -from torch.utils.data import Dataset -from torchvision import transforms - - -class LSUNBase(Dataset): - def __init__(self, - txt_file, - data_root, - size=None, - interpolation="bicubic", - flip_p=0.5 - ): - self.data_paths = txt_file - self.data_root = data_root - with open(self.data_paths, "r") as f: - self.image_paths = f.read().splitlines() - self._length = len(self.image_paths) - self.labels = { - "relative_file_path_": [l for l in self.image_paths], - "file_path_": [os.path.join(self.data_root, l) - for l in self.image_paths], - } - - self.size = size - self.interpolation = {"linear": PIL.Image.LINEAR, - "bilinear": PIL.Image.BILINEAR, - "bicubic": PIL.Image.BICUBIC, - "lanczos": PIL.Image.LANCZOS, - }[interpolation] - self.flip = transforms.RandomHorizontalFlip(p=flip_p) - - def __len__(self): - return self._length - - def __getitem__(self, i): - example = dict((k, self.labels[k][i]) for k in self.labels) - image = Image.open(example["file_path_"]) - if not image.mode == "RGB": - image = image.convert("RGB") - - # default to score-sde preprocessing - img = np.array(image).astype(np.uint8) - crop = min(img.shape[0], img.shape[1]) - h, w, = img.shape[0], img.shape[1] - img = img[(h - crop) // 2:(h + crop) // 2, - (w - crop) // 2:(w + crop) // 2] - - image = Image.fromarray(img) - if self.size is not None: - image = image.resize((self.size, self.size), resample=self.interpolation) - - image = self.flip(image) - image = np.array(image).astype(np.uint8) - example["image"] = (image / 127.5 - 1.0).astype(np.float32) - return example - - -class LSUNChurchesTrain(LSUNBase): - def __init__(self, **kwargs): - super().__init__(txt_file="data/lsun/church_outdoor_train.txt", data_root="data/lsun/churches", **kwargs) - - -class LSUNChurchesValidation(LSUNBase): - def __init__(self, flip_p=0., **kwargs): - super().__init__(txt_file="data/lsun/church_outdoor_val.txt", data_root="data/lsun/churches", - flip_p=flip_p, **kwargs) - - -class LSUNBedroomsTrain(LSUNBase): - def __init__(self, **kwargs): - super().__init__(txt_file="data/lsun/bedrooms_train.txt", data_root="data/lsun/bedrooms", **kwargs) - - -class LSUNBedroomsValidation(LSUNBase): - def __init__(self, flip_p=0.0, **kwargs): - super().__init__(txt_file="data/lsun/bedrooms_val.txt", data_root="data/lsun/bedrooms", - flip_p=flip_p, **kwargs) - - -class LSUNCatsTrain(LSUNBase): - def __init__(self, **kwargs): - super().__init__(txt_file="data/lsun/cat_train.txt", data_root="data/lsun/cats", **kwargs) - - -class LSUNCatsValidation(LSUNBase): - def __init__(self, flip_p=0., **kwargs): - super().__init__(txt_file="data/lsun/cat_val.txt", data_root="data/lsun/cats", - flip_p=flip_p, **kwargs) diff --git a/ldm/lr_scheduler.py b/ldm/lr_scheduler.py deleted file mode 100644 index 9c832cdaa38f2bb63d414ac7ebf3979cd700246d..0000000000000000000000000000000000000000 --- a/ldm/lr_scheduler.py +++ /dev/null @@ -1,81 +0,0 @@ -import numpy as np - - -class LambdaWarmUpCosineScheduler: - """ - note: use with a base_lr of 1.0 - """ - def __init__(self, warm_up_steps, lr_min, lr_max, lr_start, max_decay_steps, verbosity_interval=0): - self.lr_warm_up_steps = warm_up_steps - self.lr_start = lr_start - self.lr_min = lr_min - self.lr_max = lr_max - self.lr_max_decay_steps = max_decay_steps - self.last_lr = 0. - self.verbosity_interval = verbosity_interval - - def schedule(self, n, **kwargs): - if self.verbosity_interval > 0: - if n % self.verbosity_interval == 0: print(f"current step: {n}, recent lr-multiplier: {self.last_lr}") - if n < self.lr_warm_up_steps: - lr = (self.lr_max - self.lr_start) / self.lr_warm_up_steps * n + self.lr_start - self.last_lr = lr - return lr - else: - t = (n - self.lr_warm_up_steps) / (self.lr_max_decay_steps - self.lr_warm_up_steps) - t = min(t, 1.0) - lr = self.lr_min + 0.5 * (self.lr_max - self.lr_min) * ( - 1 + np.cos(t * np.pi)) - self.last_lr = lr - return lr - - def __call__(self, n, **kwargs): - return self.schedule(n,**kwargs) - - -class LambdaWarmUpCosineScheduler2: - """ - supports repeated iterations, configurable via lists - note: use with a base_lr of 1.0. - """ - def __init__(self, warm_up_steps, f_min, f_max, f_start, cycle_lengths, verbosity_interval=0): - assert len(warm_up_steps) == len(f_min) == len(f_max) == len(f_start) == len(cycle_lengths) - self.lr_warm_up_steps = warm_up_steps # [10000] - self.f_start = f_start # 1.e-6 - self.f_min = f_min # 1. - self.f_max = f_max # 1. - self.cycle_lengths = cycle_lengths # [10000000000000] - self.cum_cycles = np.cumsum([0] + list(self.cycle_lengths)) - self.last_f = 0. - self.verbosity_interval = verbosity_interval # 0 - - def find_in_interval(self, n): - interval = 0 - for cl in self.cum_cycles[1:]: - if n <= cl: - return interval - interval += 1 - - - def __call__(self, n, **kwargs): - return self.schedule(n, **kwargs) - - -class LambdaLinearScheduler(LambdaWarmUpCosineScheduler2): - - def schedule(self, n, **kwargs): - cycle = self.find_in_interval(n) - n = n - self.cum_cycles[cycle] - if self.verbosity_interval > 0: - if n % self.verbosity_interval == 0: print(f"current step: {n}, recent lr-multiplier: {self.last_f}, " - f"current cycle {cycle}") - - if n < self.lr_warm_up_steps[cycle]: - f = (self.f_max[cycle] - self.f_start[cycle]) / self.lr_warm_up_steps[cycle] * n + self.f_start[cycle] - self.last_f = f - return f - else: - f = self.f_min[cycle] + (self.f_max[cycle] - self.f_min[cycle]) * (self.cycle_lengths[cycle] - n) / (self.cycle_lengths[cycle]) - self.last_f = f - return f - diff --git a/ldm/models/.DS_Store b/ldm/models/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/models/.DS_Store and /dev/null differ diff --git a/ldm/models/__pycache__/autoencoder.cpython-38.pyc b/ldm/models/__pycache__/autoencoder.cpython-38.pyc deleted file mode 100644 index cdea3317e654310ce14f5a18678cd91e1c457e32..0000000000000000000000000000000000000000 Binary files a/ldm/models/__pycache__/autoencoder.cpython-38.pyc and /dev/null differ diff --git a/ldm/models/autoencoder.py b/ldm/models/autoencoder.py deleted file mode 100644 index 7eab8f00588c5d822040dcc5c26b3dd923ae66c1..0000000000000000000000000000000000000000 --- a/ldm/models/autoencoder.py +++ /dev/null @@ -1,408 +0,0 @@ -import torch -import pytorch_lightning as pl -import torch.nn.functional as F -from contextlib import contextmanager - -from taming.modules.vqvae.quantize import VectorQuantizer2 as VectorQuantizer - -from ldm.modules.diffusionmodules.model import Encoder, Decoder -from ldm.modules.distributions.distributions import DiagonalGaussianDistribution - -from ldm.util import instantiate_from_config - - -class VQModel(pl.LightningModule): - def __init__(self, - ddconfig, - lossconfig, - n_embed, - embed_dim, - ckpt_path=None, - ignore_keys=[], - image_key="image", - colorize_nlabels=None, - monitor=None, - batch_resize_range=None, - scheduler_config=None, - lr_g_factor=1.0, - remap=None, - sane_index_shape=False, # tell vector quantizer to return indices as bhw - use_ema=False - ): - super().__init__() - self.embed_dim = embed_dim - self.n_embed = n_embed - self.image_key = image_key - self.encoder = Encoder(**ddconfig) - self.decoder = Decoder(**ddconfig) - self.loss = instantiate_from_config(lossconfig) - self.quantize = VectorQuantizer(n_embed, embed_dim, beta=0.25, - remap=remap, - sane_index_shape=sane_index_shape) - self.quant_conv = torch.nn.Conv2d(ddconfig["z_channels"], embed_dim, 1) - self.post_quant_conv = torch.nn.Conv2d(embed_dim, ddconfig["z_channels"], 1) - if colorize_nlabels is not None: - assert type(colorize_nlabels)==int - self.register_buffer("colorize", torch.randn(3, colorize_nlabels, 1, 1)) - if monitor is not None: - self.monitor = monitor - self.batch_resize_range = batch_resize_range - if self.batch_resize_range is not None: - print(f"{self.__class__.__name__}: Using per-batch resizing in range {batch_resize_range}.") - - self.use_ema = use_ema - if self.use_ema: - self.model_ema = LitEma(self) - print(f"Keeping EMAs of {len(list(self.model_ema.buffers()))}.") - - if ckpt_path is not None: - self.init_from_ckpt(ckpt_path, ignore_keys=ignore_keys) - self.scheduler_config = scheduler_config - self.lr_g_factor = lr_g_factor - - @contextmanager - def ema_scope(self, context=None): - if self.use_ema: - self.model_ema.store(self.parameters()) - self.model_ema.copy_to(self) - if context is not None: - print(f"{context}: Switched to EMA weights") - try: - yield None - finally: - if self.use_ema: - self.model_ema.restore(self.parameters()) - if context is not None: - print(f"{context}: Restored training weights") - - def init_from_ckpt(self, path, ignore_keys=list()): - sd = torch.load(path, map_location="cpu")["state_dict"] - keys = list(sd.keys()) - for k in keys: - for ik in ignore_keys: - if k.startswith(ik): - print("Deleting key {} from state_dict.".format(k)) - del sd[k] - missing, unexpected = self.load_state_dict(sd, strict=False) - print(f"Restored from {path} with {len(missing)} missing and {len(unexpected)} unexpected keys") - if len(missing) > 0: - print(f"Missing Keys: {missing}") - print(f"Unexpected Keys: {unexpected}") - - def on_train_batch_end(self, *args, **kwargs): - if self.use_ema: - self.model_ema(self) - - def encode(self, x): - h = self.encoder(x) - h = self.quant_conv(h) - quant, emb_loss, info = self.quantize(h) - return quant, emb_loss, info - - def encode_to_prequant(self, x): - h = self.encoder(x) - h = self.quant_conv(h) - return h - - def decode(self, quant): - quant = self.post_quant_conv(quant) - dec = self.decoder(quant) - return dec - - def decode_code(self, code_b): - quant_b = self.quantize.embed_code(code_b) - dec = self.decode(quant_b) - return dec - - def forward(self, input, return_pred_indices=False): - quant, diff, (_,_,ind) = self.encode(input) - dec = self.decode(quant) - if return_pred_indices: - return dec, diff, ind - return dec, diff - - def get_input(self, batch, k): - x = batch[k] - if len(x.shape) == 3: - x = x[..., None] - x = x.permute(0, 3, 1, 2).to(memory_format=torch.contiguous_format).float() - if self.batch_resize_range is not None: - lower_size = self.batch_resize_range[0] - upper_size = self.batch_resize_range[1] - if self.global_step <= 4: - # do the first few batches with max size to avoid later oom - new_resize = upper_size - else: - new_resize = np.random.choice(np.arange(lower_size, upper_size+16, 16)) - if new_resize != x.shape[2]: - x = F.interpolate(x, size=new_resize, mode="bicubic") - x = x.detach() - return x - - def training_step(self, batch, batch_idx, optimizer_idx): - # https://github.com/pytorch/pytorch/issues/37142 - # try not to fool the heuristics - x = self.get_input(batch, self.image_key) - xrec, qloss, ind = self(x, return_pred_indices=True) - - if optimizer_idx == 0: - # autoencode - aeloss, log_dict_ae = self.loss(qloss, x, xrec, optimizer_idx, self.global_step, - last_layer=self.get_last_layer(), split="train", - predicted_indices=ind) - - self.log_dict(log_dict_ae, prog_bar=False, logger=True, on_step=True, on_epoch=True) - return aeloss - - if optimizer_idx == 1: - # discriminator - discloss, log_dict_disc = self.loss(qloss, x, xrec, optimizer_idx, self.global_step, - last_layer=self.get_last_layer(), split="train") - self.log_dict(log_dict_disc, prog_bar=False, logger=True, on_step=True, on_epoch=True) - return discloss - - def validation_step(self, batch, batch_idx): - log_dict = self._validation_step(batch, batch_idx) - with self.ema_scope(): - log_dict_ema = self._validation_step(batch, batch_idx, suffix="_ema") - return log_dict - - def _validation_step(self, batch, batch_idx, suffix=""): - x = self.get_input(batch, self.image_key) - xrec, qloss, ind = self(x, return_pred_indices=True) - aeloss, log_dict_ae = self.loss(qloss, x, xrec, 0, - self.global_step, - last_layer=self.get_last_layer(), - split="val"+suffix, - predicted_indices=ind - ) - - discloss, log_dict_disc = self.loss(qloss, x, xrec, 1, - self.global_step, - last_layer=self.get_last_layer(), - split="val"+suffix, - predicted_indices=ind - ) - rec_loss = log_dict_ae[f"val{suffix}/rec_loss"] - self.log(f"val{suffix}/rec_loss", rec_loss, - prog_bar=True, logger=True, on_step=False, on_epoch=True, sync_dist=True) - self.log(f"val{suffix}/aeloss", aeloss, - prog_bar=True, logger=True, on_step=False, on_epoch=True, sync_dist=True) - if version.parse(pl.__version__) >= version.parse('1.4.0'): - del log_dict_ae[f"val{suffix}/rec_loss"] - self.log_dict(log_dict_ae) - self.log_dict(log_dict_disc) - return self.log_dict - - def configure_optimizers(self): - lr_d = self.learning_rate - lr_g = self.lr_g_factor*self.learning_rate - print("lr_d", lr_d) - print("lr_g", lr_g) - opt_ae = torch.optim.Adam(list(self.encoder.parameters())+ - list(self.decoder.parameters())+ - list(self.quantize.parameters())+ - list(self.quant_conv.parameters())+ - list(self.post_quant_conv.parameters()), - lr=lr_g, betas=(0.5, 0.9)) - opt_disc = torch.optim.Adam(self.loss.discriminator.parameters(), - lr=lr_d, betas=(0.5, 0.9)) - - if self.scheduler_config is not None: - scheduler = instantiate_from_config(self.scheduler_config) - - print("Setting up LambdaLR scheduler...") - scheduler = [ - { - 'scheduler': LambdaLR(opt_ae, lr_lambda=scheduler.schedule), - 'interval': 'step', - 'frequency': 1 - }, - { - 'scheduler': LambdaLR(opt_disc, lr_lambda=scheduler.schedule), - 'interval': 'step', - 'frequency': 1 - }, - ] - return [opt_ae, opt_disc], scheduler - return [opt_ae, opt_disc], [] - - def get_last_layer(self): - return self.decoder.conv_out.weight - - def log_images(self, batch, only_inputs=False, plot_ema=False, **kwargs): - log = dict() - x = self.get_input(batch, self.image_key) - x = x.to(self.device) - if only_inputs: - log["inputs"] = x - return log - xrec, _ = self(x) - if x.shape[1] > 3: - # colorize with random projection - assert xrec.shape[1] > 3 - x = self.to_rgb(x) - xrec = self.to_rgb(xrec) - log["inputs"] = x - log["reconstructions"] = xrec - if plot_ema: - with self.ema_scope(): - xrec_ema, _ = self(x) - if x.shape[1] > 3: xrec_ema = self.to_rgb(xrec_ema) - log["reconstructions_ema"] = xrec_ema - return log - - def to_rgb(self, x): - assert self.image_key == "segmentation" - if not hasattr(self, "colorize"): - self.register_buffer("colorize", torch.randn(3, x.shape[1], 1, 1).to(x)) - x = F.conv2d(x, weight=self.colorize) - x = 2.*(x-x.min())/(x.max()-x.min()) - 1. - return x - - -class VQModelInterface(VQModel): - def __init__(self, embed_dim, *args, **kwargs): - super().__init__(embed_dim=embed_dim, *args, **kwargs) - self.embed_dim = embed_dim - - def encode(self, x): - h = self.encoder(x) - h = self.quant_conv(h) - return h - - def decode(self, h, force_not_quantize=False): - # also go through quantization layer - if not force_not_quantize: - quant, emb_loss, info = self.quantize(h) - else: - quant = h - quant = self.post_quant_conv(quant) - dec = self.decoder(quant) - return dec - - -class AutoencoderKL(pl.LightningModule): - def __init__(self, - embed_dim, # 4 - monitor, # "val/rec_loss" - ddconfig, # {...} - lossconfig, # {target: torch.nn.Identity} - ckpt_path=None, - ignore_keys=[], - image_key="image", - colorize_nlabels=None): - super().__init__() - self.image_key = image_key # "image" - self.encoder = Encoder(**ddconfig) - self.decoder = Decoder(**ddconfig) - self.loss = instantiate_from_config(lossconfig) - self.quant_conv = torch.nn.Conv2d(2*ddconfig["z_channels"], 2*embed_dim, 1) # 8 -> 8 - self.post_quant_conv = torch.nn.Conv2d(embed_dim, ddconfig["z_channels"], 1) # 4 -> 4 - self.embed_dim = embed_dim - self.monitor = monitor - - def encode(self, x): - h = self.encoder(x) - moments = self.quant_conv(h) - posterior = DiagonalGaussianDistribution(moments) - return posterior - - def decode(self, z): - z = self.post_quant_conv(z) - dec = self.decoder(z) - return dec - - def forward(self, input, sample_posterior=True): - posterior = self.encode(input) - if sample_posterior: - z = posterior.sample() - else: - z = posterior.mode() - dec = self.decode(z) - return dec, posterior - - def get_input(self, batch, k): - x = batch[k] - if len(x.shape) == 3: - x = x[..., None] - x = x.permute(0, 3, 1, 2).to(memory_format=torch.contiguous_format).float() - return x - - def training_step(self, batch, batch_idx, optimizer_idx): - inputs = self.get_input(batch, self.image_key) - reconstructions, posterior = self(inputs) - - if optimizer_idx == 0: - # train encoder+decoder+logvar - aeloss, log_dict_ae = self.loss(inputs, reconstructions, posterior, optimizer_idx, self.global_step, - last_layer=self.get_last_layer(), split="train") - self.log("aeloss", aeloss, prog_bar=True, logger=True, on_step=True, on_epoch=True) - self.log_dict(log_dict_ae, prog_bar=False, logger=True, on_step=True, on_epoch=False) - return aeloss - - if optimizer_idx == 1: - # train the discriminator - discloss, log_dict_disc = self.loss(inputs, reconstructions, posterior, optimizer_idx, self.global_step, - last_layer=self.get_last_layer(), split="train") - - self.log("discloss", discloss, prog_bar=True, logger=True, on_step=True, on_epoch=True) - self.log_dict(log_dict_disc, prog_bar=False, logger=True, on_step=True, on_epoch=False) - return discloss - - def validation_step(self, batch, batch_idx): - inputs = self.get_input(batch, self.image_key) - reconstructions, posterior = self(inputs) - aeloss, log_dict_ae = self.loss(inputs, reconstructions, posterior, 0, self.global_step, - last_layer=self.get_last_layer(), split="val") - - discloss, log_dict_disc = self.loss(inputs, reconstructions, posterior, 1, self.global_step, - last_layer=self.get_last_layer(), split="val") - - self.log("val/rec_loss", log_dict_ae["val/rec_loss"]) - self.log_dict(log_dict_ae) - self.log_dict(log_dict_disc) - return self.log_dict - - def configure_optimizers(self): - lr = self.learning_rate - opt_ae = torch.optim.Adam(list(self.encoder.parameters())+ - list(self.decoder.parameters())+ - list(self.quant_conv.parameters())+ - list(self.post_quant_conv.parameters()), - lr=lr, betas=(0.5, 0.9)) - opt_disc = torch.optim.Adam(self.loss.discriminator.parameters(), - lr=lr, betas=(0.5, 0.9)) - return [opt_ae, opt_disc], [] - - def get_last_layer(self): - return self.decoder.conv_out.weight - - @torch.no_grad() - def log_images(self, batch, only_inputs=False, **kwargs): - log = dict() - x = self.get_input(batch, self.image_key) - x = x.to(self.device) - if not only_inputs: - xrec, posterior = self(x) - if x.shape[1] > 3: - # colorize with random projection - assert xrec.shape[1] > 3 - x = self.to_rgb(x) - xrec = self.to_rgb(xrec) - log["samples"] = self.decode(torch.randn_like(posterior.sample())) - log["reconstructions"] = xrec - log["inputs"] = x - return log - - def to_rgb(self, x): - assert self.image_key == "segmentation" - if not hasattr(self, "colorize"): - self.register_buffer("colorize", torch.randn(3, x.shape[1], 1, 1).to(x)) - x = F.conv2d(x, weight=self.colorize) - x = 2.*(x-x.min())/(x.max()-x.min()) - 1. - return x - - - - diff --git a/ldm/models/diffusion/.DS_Store b/ldm/models/diffusion/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/models/diffusion/.DS_Store and /dev/null differ diff --git a/ldm/models/diffusion/__init__.py b/ldm/models/diffusion/__init__.py deleted file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000 diff --git a/ldm/models/diffusion/__pycache__/__init__.cpython-38.pyc b/ldm/models/diffusion/__pycache__/__init__.cpython-38.pyc deleted file mode 100644 index 2a1c508cc7c7f9531fbc8eaef6cb032aece89f9f..0000000000000000000000000000000000000000 Binary files a/ldm/models/diffusion/__pycache__/__init__.cpython-38.pyc and /dev/null differ diff --git a/ldm/models/diffusion/__pycache__/control.cpython-38.pyc b/ldm/models/diffusion/__pycache__/control.cpython-38.pyc deleted file mode 100644 index 2c73ed28a6314214ced12623a1d405114b79f5bd..0000000000000000000000000000000000000000 Binary files a/ldm/models/diffusion/__pycache__/control.cpython-38.pyc and /dev/null differ diff --git a/ldm/models/diffusion/__pycache__/ddim.cpython-38.pyc b/ldm/models/diffusion/__pycache__/ddim.cpython-38.pyc deleted file mode 100644 index a2fa44b5c25a324125857cc3412f0acc701f7331..0000000000000000000000000000000000000000 Binary files a/ldm/models/diffusion/__pycache__/ddim.cpython-38.pyc and /dev/null differ diff --git a/ldm/models/diffusion/__pycache__/ddpm.cpython-38.pyc b/ldm/models/diffusion/__pycache__/ddpm.cpython-38.pyc deleted file mode 100644 index effef2d0a27a421cd40011d312e5ba438d392f3a..0000000000000000000000000000000000000000 Binary files a/ldm/models/diffusion/__pycache__/ddpm.cpython-38.pyc and /dev/null differ diff --git a/ldm/models/diffusion/classifier.py b/ldm/models/diffusion/classifier.py deleted file mode 100644 index 8194f15e70546a38c85b2152c761e21706f3327e..0000000000000000000000000000000000000000 --- a/ldm/models/diffusion/classifier.py +++ /dev/null @@ -1,267 +0,0 @@ -import os -import torch -import pytorch_lightning as pl -from omegaconf import OmegaConf -from torch.nn import functional as F -from torch.optim import AdamW -from torch.optim.lr_scheduler import LambdaLR -from copy import deepcopy -from einops import rearrange -from glob import glob -from natsort import natsorted - -from ldm.modules.diffusionmodules.openaimodel import EncoderUNetModel, UNetModel -from ldm.util import log_txt_as_img, default, ismap, instantiate_from_config - -__models__ = { - 'class_label': EncoderUNetModel, - 'segmentation': UNetModel -} - - -def disabled_train(self, mode=True): - """Overwrite model.train with this function to make sure train/eval mode - does not change anymore.""" - return self - - -class NoisyLatentImageClassifier(pl.LightningModule): - - def __init__(self, - diffusion_path, - num_classes, - ckpt_path=None, - pool='attention', - label_key=None, - diffusion_ckpt_path=None, - scheduler_config=None, - weight_decay=1.e-2, - log_steps=10, - monitor='val/loss', - *args, - **kwargs): - super().__init__(*args, **kwargs) - self.num_classes = num_classes - # get latest config of diffusion model - diffusion_config = natsorted(glob(os.path.join(diffusion_path, 'configs', '*-project.yaml')))[-1] - self.diffusion_config = OmegaConf.load(diffusion_config).model - self.diffusion_config.params.ckpt_path = diffusion_ckpt_path - self.load_diffusion() - - self.monitor = monitor - self.numd = self.diffusion_model.first_stage_model.encoder.num_resolutions - 1 - self.log_time_interval = self.diffusion_model.num_timesteps // log_steps - self.log_steps = log_steps - - self.label_key = label_key if not hasattr(self.diffusion_model, 'cond_stage_key') \ - else self.diffusion_model.cond_stage_key - - assert self.label_key is not None, 'label_key neither in diffusion model nor in model.params' - - if self.label_key not in __models__: - raise NotImplementedError() - - self.load_classifier(ckpt_path, pool) - - self.scheduler_config = scheduler_config - self.use_scheduler = self.scheduler_config is not None - self.weight_decay = weight_decay - - def init_from_ckpt(self, path, ignore_keys=list(), only_model=False): - sd = torch.load(path, map_location="cpu") - if "state_dict" in list(sd.keys()): - sd = sd["state_dict"] - keys = list(sd.keys()) - for k in keys: - for ik in ignore_keys: - if k.startswith(ik): - print("Deleting key {} from state_dict.".format(k)) - del sd[k] - missing, unexpected = self.load_state_dict(sd, strict=False) if not only_model else self.model.load_state_dict( - sd, strict=False) - print(f"Restored from {path} with {len(missing)} missing and {len(unexpected)} unexpected keys") - if len(missing) > 0: - print(f"Missing Keys: {missing}") - if len(unexpected) > 0: - print(f"Unexpected Keys: {unexpected}") - - def load_diffusion(self): - model = instantiate_from_config(self.diffusion_config) - self.diffusion_model = model.eval() - self.diffusion_model.train = disabled_train - for param in self.diffusion_model.parameters(): - param.requires_grad = False - - def load_classifier(self, ckpt_path, pool): - model_config = deepcopy(self.diffusion_config.params.unet_config.params) - model_config.in_channels = self.diffusion_config.params.unet_config.params.out_channels - model_config.out_channels = self.num_classes - if self.label_key == 'class_label': - model_config.pool = pool - - self.model = __models__[self.label_key](**model_config) - if ckpt_path is not None: - print('#####################################################################') - print(f'load from ckpt "{ckpt_path}"') - print('#####################################################################') - self.init_from_ckpt(ckpt_path) - - @torch.no_grad() - def get_x_noisy(self, x, t, noise=None): - noise = default(noise, lambda: torch.randn_like(x)) - continuous_sqrt_alpha_cumprod = None - if self.diffusion_model.use_continuous_noise: - continuous_sqrt_alpha_cumprod = self.diffusion_model.sample_continuous_noise_level(x.shape[0], t + 1) - # todo: make sure t+1 is correct here - - return self.diffusion_model.q_sample(x_start=x, t=t, noise=noise, - continuous_sqrt_alpha_cumprod=continuous_sqrt_alpha_cumprod) - - def forward(self, x_noisy, t, *args, **kwargs): - return self.model(x_noisy, t) - - @torch.no_grad() - def get_input(self, batch, k): - x = batch[k] - if len(x.shape) == 3: - x = x[..., None] - x = rearrange(x, 'b h w c -> b c h w') - x = x.to(memory_format=torch.contiguous_format).float() - return x - - @torch.no_grad() - def get_conditioning(self, batch, k=None): - if k is None: - k = self.label_key - assert k is not None, 'Needs to provide label key' - - targets = batch[k].to(self.device) - - if self.label_key == 'segmentation': - targets = rearrange(targets, 'b h w c -> b c h w') - for down in range(self.numd): - h, w = targets.shape[-2:] - targets = F.interpolate(targets, size=(h // 2, w // 2), mode='nearest') - - # targets = rearrange(targets,'b c h w -> b h w c') - - return targets - - def compute_top_k(self, logits, labels, k, reduction="mean"): - _, top_ks = torch.topk(logits, k, dim=1) - if reduction == "mean": - return (top_ks == labels[:, None]).float().sum(dim=-1).mean().item() - elif reduction == "none": - return (top_ks == labels[:, None]).float().sum(dim=-1) - - def on_train_epoch_start(self): - # save some memory - self.diffusion_model.model.to('cpu') - - @torch.no_grad() - def write_logs(self, loss, logits, targets): - log_prefix = 'train' if self.training else 'val' - log = {} - log[f"{log_prefix}/loss"] = loss.mean() - log[f"{log_prefix}/acc@1"] = self.compute_top_k( - logits, targets, k=1, reduction="mean" - ) - log[f"{log_prefix}/acc@5"] = self.compute_top_k( - logits, targets, k=5, reduction="mean" - ) - - self.log_dict(log, prog_bar=False, logger=True, on_step=self.training, on_epoch=True) - self.log('loss', log[f"{log_prefix}/loss"], prog_bar=True, logger=False) - self.log('global_step', self.global_step, logger=False, on_epoch=False, prog_bar=True) - lr = self.optimizers().param_groups[0]['lr'] - self.log('lr_abs', lr, on_step=True, logger=True, on_epoch=False, prog_bar=True) - - def shared_step(self, batch, t=None): - x, *_ = self.diffusion_model.get_input(batch, k=self.diffusion_model.first_stage_key) - targets = self.get_conditioning(batch) - if targets.dim() == 4: - targets = targets.argmax(dim=1) - if t is None: - t = torch.randint(0, self.diffusion_model.num_timesteps, (x.shape[0],), device=self.device).long() - else: - t = torch.full(size=(x.shape[0],), fill_value=t, device=self.device).long() - x_noisy = self.get_x_noisy(x, t) - logits = self(x_noisy, t) - - loss = F.cross_entropy(logits, targets, reduction='none') - - self.write_logs(loss.detach(), logits.detach(), targets.detach()) - - loss = loss.mean() - return loss, logits, x_noisy, targets - - def training_step(self, batch, batch_idx): - loss, *_ = self.shared_step(batch) - return loss - - def reset_noise_accs(self): - self.noisy_acc = {t: {'acc@1': [], 'acc@5': []} for t in - range(0, self.diffusion_model.num_timesteps, self.diffusion_model.log_every_t)} - - def on_validation_start(self): - self.reset_noise_accs() - - @torch.no_grad() - def validation_step(self, batch, batch_idx): - loss, *_ = self.shared_step(batch) - - for t in self.noisy_acc: - _, logits, _, targets = self.shared_step(batch, t) - self.noisy_acc[t]['acc@1'].append(self.compute_top_k(logits, targets, k=1, reduction='mean')) - self.noisy_acc[t]['acc@5'].append(self.compute_top_k(logits, targets, k=5, reduction='mean')) - - return loss - - def configure_optimizers(self): - optimizer = AdamW(self.model.parameters(), lr=self.learning_rate, weight_decay=self.weight_decay) - - if self.use_scheduler: - scheduler = instantiate_from_config(self.scheduler_config) - - print("Setting up LambdaLR scheduler...") - scheduler = [ - { - 'scheduler': LambdaLR(optimizer, lr_lambda=scheduler.schedule), - 'interval': 'step', - 'frequency': 1 - }] - return [optimizer], scheduler - - return optimizer - - @torch.no_grad() - def log_images(self, batch, N=8, *args, **kwargs): - log = dict() - x = self.get_input(batch, self.diffusion_model.first_stage_key) - log['inputs'] = x - - y = self.get_conditioning(batch) - - if self.label_key == 'class_label': - y = log_txt_as_img((x.shape[2], x.shape[3]), batch["human_label"]) - log['labels'] = y - - if ismap(y): - log['labels'] = self.diffusion_model.to_rgb(y) - - for step in range(self.log_steps): - current_time = step * self.log_time_interval - - _, logits, x_noisy, _ = self.shared_step(batch, t=current_time) - - log[f'inputs@t{current_time}'] = x_noisy - - pred = F.one_hot(logits.argmax(dim=1), num_classes=self.num_classes) - pred = rearrange(pred, 'b h w c -> b c h w') - - log[f'pred@t{current_time}'] = self.diffusion_model.to_rgb(pred) - - for key in log: - log[key] = log[key][:N] - - return log diff --git a/ldm/models/diffusion/control.py b/ldm/models/diffusion/control.py deleted file mode 100644 index 4601d4a489cd72fbb395cfd824a86b9cddf52528..0000000000000000000000000000000000000000 --- a/ldm/models/diffusion/control.py +++ /dev/null @@ -1,406 +0,0 @@ -import random -import torch -import torchvision -import torch.nn as nn -import torch.nn.functional as F -from torch.optim.lr_scheduler import CosineAnnealingLR - -from einops import rearrange -from ldm.modules.diffusionmodules.util import ( - conv_nd, - linear, - zero_module, - timestep_embedding, -) -from ldm.models.diffusion.ddpm import DDPM -from ldm.modules.attention import SpatialTransformer -from ldm.modules.diffusionmodules.openaimodel import UNetModel, TimestepEmbedSequential, ResBlock, Downsample, AttentionBlock -from ldm.util import instantiate_from_config, default -from ldm.models.diffusion.ddim import DDIMSampler - -import torch -from torch.optim.optimizer import Optimizer -from torch.optim.lr_scheduler import LambdaLR - - -def disabled_train(self, mode=True): - return self - - -# ============================================================= -# 可训练部分 ControlNet -# ============================================================= -class ControlNet(nn.Module): - def __init__( - self, - in_channels, # 9 - model_channels, # 320 - hint_channels, # 20 - attention_resolutions, # [4,2,1] - num_res_blocks, # 2 - channel_mult=(1, 2, 4, 8), # [1,2,4,4] - num_head_channels=-1, # 64 - transformer_depth=1, # 1 - context_dim=None, # 768 - use_checkpoint=False, # True - dropout=0, - conv_resample=True, - dims=2, - num_heads=-1, - use_scale_shift_norm=False): - super(ControlNet, self).__init__() - self.dims = dims - self.in_channels = in_channels - self.model_channels = model_channels - self.num_res_blocks = len(channel_mult) * [num_res_blocks] - self.attention_resolutions = attention_resolutions - self.dropout = dropout - self.channel_mult = channel_mult - self.use_checkpoint = use_checkpoint - self.dtype = torch.float32 - self.num_heads = num_heads - self.num_head_channels = num_head_channels - - # time 编码器 - time_embed_dim = model_channels * 4 - self.time_embed = nn.Sequential( - linear(model_channels, time_embed_dim), - nn.SiLU(), - linear(time_embed_dim, time_embed_dim), - ) - - # input 编码器 - self.input_blocks = nn.ModuleList( - [ - TimestepEmbedSequential( - conv_nd(dims, in_channels, model_channels, 3, padding=1) - ) - ] - ) - self.zero_convs = nn.ModuleList([self.make_zero_conv(model_channels)]) - - # hint 编码器 - self.input_hint_block = TimestepEmbedSequential( - conv_nd(dims, hint_channels, 16, 3, padding=1), - nn.SiLU(), - conv_nd(dims, 16, 16, 3, padding=1), - nn.SiLU(), - conv_nd(dims, 16, 32, 3, padding=1, stride=2), - nn.SiLU(), - conv_nd(dims, 32, 32, 3, padding=1), - nn.SiLU(), - conv_nd(dims, 32, 96, 3, padding=1, stride=2), - nn.SiLU(), - conv_nd(dims, 96, 96, 3, padding=1), - nn.SiLU(), - conv_nd(dims, 96, 256, 3, padding=1, stride=2), - nn.SiLU(), - zero_module(conv_nd(dims, 256, model_channels, 3, padding=1)) - ) - - # UNet - input_block_chans = [model_channels] - ch = model_channels - ds = 1 - for level, mult in enumerate(channel_mult): - for nr in range(self.num_res_blocks[level]): - layers = [ - ResBlock( - ch, - time_embed_dim, - dropout, - out_channels=mult * model_channels, - dims=dims, - use_checkpoint=use_checkpoint, - use_scale_shift_norm=use_scale_shift_norm, - ) - ] - ch = mult * model_channels - if ds in attention_resolutions: - num_heads = ch // num_head_channels - dim_head = num_head_channels - disabled_sa = False - - layers.append( - SpatialTransformer( - ch, num_heads, dim_head, depth=transformer_depth, context_dim=context_dim) - ) - self.input_blocks.append(TimestepEmbedSequential(*layers)) - self.zero_convs.append(self.make_zero_conv(ch)) - input_block_chans.append(ch) - if level != len(channel_mult) - 1: - out_ch = ch - self.input_blocks.append( - TimestepEmbedSequential( - Downsample(ch, conv_resample, dims=dims, out_channels=out_ch) - ) - ) - ch = out_ch - input_block_chans.append(ch) - self.zero_convs.append(self.make_zero_conv(ch)) - ds *= 2 - num_heads = ch // num_head_channels - dim_head = num_head_channels - self.middle_block = TimestepEmbedSequential( - ResBlock( - ch, - time_embed_dim, - dropout, - dims=dims, - use_checkpoint=use_checkpoint, - use_scale_shift_norm=use_scale_shift_norm, - ), - SpatialTransformer(ch, num_heads, dim_head, depth=transformer_depth, context_dim=context_dim), - ResBlock( - ch, - time_embed_dim, - dropout, - dims=dims, - use_checkpoint=use_checkpoint, - use_scale_shift_norm=use_scale_shift_norm, - ), - ) - self.middle_block_out = self.make_zero_conv(ch) - - def make_zero_conv(self, channels): - return TimestepEmbedSequential(zero_module(conv_nd(self.dims, channels, channels, 1, padding=0))) - - def forward(self, x, hint, timesteps, reference_dino): - # 处理输入 - context = reference_dino - t_emb = timestep_embedding(timesteps, self.model_channels) - emb = self.time_embed(t_emb) - guided_hint = self.input_hint_block(hint, emb) - - # 预测 control - outs = [] - h = x.type(self.dtype) - for module, zero_conv in zip(self.input_blocks, self.zero_convs): - if guided_hint is not None: - h = module(h, emb, context) - h += guided_hint - guided_hint = None - else: - h = module(h, emb, context) - outs.append(zero_conv(h, emb, context)) - h = self.middle_block(h, emb, context) - outs.append(self.middle_block_out(h, emb, context)) - - return outs - -# ============================================================= -# 固定参数部分 ControlledUnetModel -# ============================================================= -class ControlledUnetModel(UNetModel): - def forward(self, x, timesteps=None, context=None, control=None): - hs = [] - - # UNet 的上半部分 - with torch.no_grad(): - t_emb = timestep_embedding(timesteps, self.model_channels) - emb = self.time_embed(t_emb) - h = x.type(self.dtype) - for module in self.input_blocks: - h = module(h, emb, context) - hs.append(h) - h = self.middle_block(h, emb, context) - - # 注入 control - if control is not None: - h += control.pop() - - # UNet 的下半部分 - for i, module in enumerate(self.output_blocks): - h = torch.cat([h, hs.pop() + control.pop()], dim=1) - h = module(h, emb, context) - - # 输出 - h = h.type(x.dtype) - h = self.out(h) - - return h - -# ============================================================= -# 主干网络 ControlLDM -# ============================================================= -class ControlLDM(DDPM): - def __init__(self, - control_stage_config, # ControlNet - first_stage_config, # AutoencoderKL - cond_stage_config, # FrozenCLIPImageEmbedder - scale_factor=1.0, # 0.18215 - *args, **kwargs): - self.num_timesteps_cond = 1 - super().__init__(*args, **kwargs) # self.model 和 self.register_buffer - self.control_model = instantiate_from_config(control_stage_config) # self.control_model - self.instantiate_first_stage(first_stage_config) # self.first_stage_model 调用 AutoencoderKL - self.instantiate_cond_stage(cond_stage_config) # self.cond_stage_model 调用 FrozenCLIPImageEmbedder - self.proj_out=nn.Linear(1024, 768) # 全连接层 - self.scale_factor = scale_factor # 0.18215 - self.learnable_vector = nn.Parameter(torch.randn((1,1,768)), requires_grad=False) - self.trainable_vector = nn.Parameter(torch.randn((1,1,768)), requires_grad=True) - - self.dinov2_vitl14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vitl14') - self.dinov2_vitl14.eval() - self.dinov2_vitl14.train = disabled_train - for param in self.dinov2_vitl14.parameters(): - param.requires_grad = False - self.linear = nn.Linear(1024, 768) - - # self.dinov2_vitg14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vitg14') - # self.dinov2_vitg14.eval() - # self.dinov2_vitg14.train = disabled_train - # for param in self.dinov2_vitg14.parameters(): - # param.requires_grad = False - # self.linear = nn.Linear(1536, 768) - - # AutoencoderKL 不训练 - def instantiate_first_stage(self, config): - model = instantiate_from_config(config) - self.first_stage_model = model.eval() - self.first_stage_model.train = disabled_train - for param in self.first_stage_model.parameters(): - param.requires_grad = False - - # FrozenCLIPImageEmbedder 不训练 - def instantiate_cond_stage(self, config): - model = instantiate_from_config(config) - self.cond_stage_model = model.eval() - self.cond_stage_model.train = disabled_train - for param in self.cond_stage_model.parameters(): - param.requires_grad = False - - # 训练 - def training_step(self, batch, batch_idx): - z_new, reference, hint= self.get_input(batch) # 加载数据 - loss= self(z_new, reference, hint) # 计算损失 - self.log("loss", # 记录损失 - loss, - prog_bar=True, - logger=True, - on_step=True, - on_epoch=True) - self.log('lr_abs', # 记录学习率 - self.optimizers().param_groups[0]['lr'], - prog_bar=True, - logger=True, - on_step=True, - on_epoch=False) - return loss - - # 加载数据 - @torch.no_grad() - def get_input(self, batch): - - # 加载原始数据 - x, inpaint, mask, reference, hint = super().get_input(batch) - - # AutoencoderKL 处理真值 - encoder_posterior = self.first_stage_model.encode(x) - z = self.scale_factor * (encoder_posterior.sample()).detach() - - # AutoencoderKL 处理 inpaint - encoder_posterior_inpaint = self.first_stage_model.encode(inpaint) - z_inpaint = self.scale_factor * (encoder_posterior_inpaint.sample()).detach() - - # Resize mask - mask_resize = torchvision.transforms.Resize([z.shape[-2],z.shape[-1]])(mask) - - # 整理 z_new - z_new = torch.cat((z,z_inpaint,mask_resize),dim=1) - out = [z_new, reference, hint] - - return out - - # 计算损失 - def forward(self, z_new, reference, hint): - - # 随机时间 t - t = torch.randint(0, self.num_timesteps, (z_new.shape[0],), device=self.device).long() - - # CLIP 处理 reference - reference_clip = self.cond_stage_model.encode(reference) - reference_clip = self.proj_out(reference_clip) - - # DINO 处理 reference - dino = self.dinov2_vitl14(reference,is_training=True) - dino1 = dino["x_norm_clstoken"].unsqueeze(1) - dino2 = dino["x_norm_patchtokens"] - reference_dino = torch.cat((dino1, dino2), dim=1) - reference_dino = self.linear(reference_dino) - - # 随机加噪 - noise = torch.randn_like(z_new[:,:4,:,:]) - x_noisy = self.q_sample(x_start=z_new[:,:4,:,:], t=t, noise=noise) - x_noisy = torch.cat((x_noisy, z_new[:,4:,:,:]),dim=1) - - # 预测噪声 - if random.uniform(0, 1)<0.2: - model_output = self.apply_model(x_noisy, hint, t, reference_clip, reference_dino) - else: - model_output = self.apply_model(x_noisy, hint, t, reference_clip, reference_dino) - - # 计算损失 - loss = self.get_loss(model_output, noise, mean=False).mean([1, 2, 3]) - loss = loss.mean() - - return loss - - # 预测噪声 - def apply_model(self, x_noisy, hint, t, reference_clip, reference_dino): - - # 预测 control - control = self.control_model(x_noisy, hint, t, reference_dino) - - # 调用 PBE - model_output = self.model(x_noisy, t, reference_clip, control) - - return model_output - - # 优化器 - def configure_optimizers(self): - # 学习率设置 - lr = self.learning_rate - params = list(self.control_model.parameters())+list(self.linear.parameters()) - opt = torch.optim.AdamW(params, lr=lr) - - return opt - - # 采样 - @torch.no_grad() - def sample_log(self, batch, ddim_steps=50, ddim_eta=0.): - z_new, reference, hint = self.get_input(batch) - x, _, mask, _, _ = super().get_input(batch) - log = dict() - - # log["reference"] = reference - # reconstruction = 1. / self.scale_factor * z_new[:,:4,:,:] - # log["reconstruction"] = self.first_stage_model.decode(reconstruction) - log["mask"] = mask - - test_model_kwargs = {} - test_model_kwargs['inpaint_image'] = z_new[:,4:8,:,:] - test_model_kwargs['inpaint_mask'] = z_new[:,8:,:,:] - ddim_sampler = DDIMSampler(self) - shape = (self.channels, self.image_size, self.image_size) - samples, _ = ddim_sampler.sample(ddim_steps, - reference.shape[0], - shape, - hint, - reference, - verbose=False, - eta=ddim_eta, - test_model_kwargs=test_model_kwargs) - samples = 1. / self.scale_factor * samples - x_samples = self.first_stage_model.decode(samples[:,:4,:,:]) - # log["samples"] = x_samples - - x = torchvision.transforms.Resize([512, 512])(x) - reference = torchvision.transforms.Resize([512, 512])(reference) - x_samples = torchvision.transforms.Resize([512, 512])(x_samples) - log["grid"] = torch.cat((x, reference, x_samples), dim=2) - - return log - - - diff --git a/ldm/models/diffusion/ddim.py b/ldm/models/diffusion/ddim.py deleted file mode 100644 index 9a2e6970fd9f460d47b626986249cae5d19c3fcc..0000000000000000000000000000000000000000 --- a/ldm/models/diffusion/ddim.py +++ /dev/null @@ -1,265 +0,0 @@ -"""SAMPLING ONLY.""" - -import torch -import numpy as np -from tqdm import tqdm -from functools import partial - -from ldm.modules.diffusionmodules.util import make_ddim_sampling_parameters, make_ddim_timesteps, noise_like, \ - extract_into_tensor - - -class DDIMSampler(object): - def __init__(self, model, schedule="linear", **kwargs): - super().__init__() - self.model = model - self.ddpm_num_timesteps = model.num_timesteps - self.schedule = schedule - - def register_buffer(self, name, attr): - if type(attr) == torch.Tensor: - if attr.device != torch.device("cuda"): - attr = attr.to(torch.device("cuda")) - setattr(self, name, attr) - - def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0., verbose=True): - self.ddim_timesteps = make_ddim_timesteps(ddim_discr_method=ddim_discretize, num_ddim_timesteps=ddim_num_steps, - num_ddpm_timesteps=self.ddpm_num_timesteps,verbose=verbose) - alphas_cumprod = self.model.alphas_cumprod - assert alphas_cumprod.shape[0] == self.ddpm_num_timesteps, 'alphas have to be defined for each timestep' - to_torch = lambda x: x.clone().detach().to(torch.float32).to(self.model.device) - - self.register_buffer('betas', to_torch(self.model.betas)) - self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod)) - self.register_buffer('alphas_cumprod_prev', to_torch(self.model.alphas_cumprod_prev)) - - # calculations for diffusion q(x_t | x_{t-1}) and others - self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod.cpu()))) - self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod.cpu()))) - self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod.cpu()))) - self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu()))) - self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu() - 1))) - - # ddim sampling parameters - ddim_sigmas, ddim_alphas, ddim_alphas_prev = make_ddim_sampling_parameters(alphacums=alphas_cumprod.cpu(), - ddim_timesteps=self.ddim_timesteps, - eta=ddim_eta,verbose=verbose) - - self.register_buffer('ddim_sigmas', ddim_sigmas) - self.register_buffer('ddim_alphas', ddim_alphas) - self.register_buffer('ddim_alphas_prev', ddim_alphas_prev) - self.register_buffer('ddim_sqrt_one_minus_alphas', np.sqrt(1. - ddim_alphas)) - sigmas_for_original_sampling_steps = ddim_eta * torch.sqrt( - (1 - self.alphas_cumprod_prev) / (1 - self.alphas_cumprod) * ( - 1 - self.alphas_cumprod / self.alphas_cumprod_prev)) - self.register_buffer('ddim_sigmas_for_original_num_steps', sigmas_for_original_sampling_steps) - - @torch.no_grad() - def sample(self, - S, - batch_size, - shape, - pose, - conditioning=None, - callback=None, - normals_sequence=None, - img_callback=None, - quantize_x0=False, - eta=0., - mask=None, - x0=None, - temperature=1., - noise_dropout=0., - score_corrector=None, - corrector_kwargs=None, - verbose=True, - x_T=None, - log_every_t=100, - unconditional_guidance_scale=1., - unconditional_conditioning=None, - **kwargs - ): - if conditioning is not None: - if isinstance(conditioning, dict): - cbs = conditioning[list(conditioning.keys())[0]].shape[0] - if cbs != batch_size: - print(f"Warning: Got {cbs} conditionings but batch-size is {batch_size}") - else: - if conditioning.shape[0] != batch_size: - print(f"Warning: Got {conditioning.shape[0]} conditionings but batch-size is {batch_size}") - - self.make_schedule(ddim_num_steps=S, ddim_eta=eta, verbose=verbose) - # sampling - C, H, W = shape - size = (batch_size, C, H, W) - print(f'Data shape for DDIM sampling is {size}, eta {eta}') - - samples, intermediates = self.ddim_sampling(conditioning, size, pose, - callback=callback, - img_callback=img_callback, - quantize_denoised=quantize_x0, - mask=mask, x0=x0, - ddim_use_original_steps=False, - noise_dropout=noise_dropout, - temperature=temperature, - score_corrector=score_corrector, - corrector_kwargs=corrector_kwargs, - x_T=x_T, - log_every_t=log_every_t, - unconditional_guidance_scale=unconditional_guidance_scale, - unconditional_conditioning=unconditional_conditioning, - **kwargs - ) - return samples, intermediates - - @torch.no_grad() - def ddim_sampling(self, cond, shape, pose, - x_T=None, ddim_use_original_steps=False, - callback=None, timesteps=None, quantize_denoised=False, - mask=None, x0=None, img_callback=None, log_every_t=100, - temperature=1., noise_dropout=0., score_corrector=None, corrector_kwargs=None, - unconditional_guidance_scale=1., unconditional_conditioning=None,**kwargs): - device = self.model.betas.device - b = shape[0] - if x_T is None: - img = torch.randn(shape, device=device) - else: - img = x_T - - if timesteps is None: - timesteps = self.ddpm_num_timesteps if ddim_use_original_steps else self.ddim_timesteps - elif timesteps is not None and not ddim_use_original_steps: - subset_end = int(min(timesteps / self.ddim_timesteps.shape[0], 1) * self.ddim_timesteps.shape[0]) - 1 - timesteps = self.ddim_timesteps[:subset_end] - - intermediates = {'x_inter': [img], 'pred_x0': [img]} - time_range = reversed(range(0,timesteps)) if ddim_use_original_steps else np.flip(timesteps) - total_steps = timesteps if ddim_use_original_steps else timesteps.shape[0] - print(f"Running DDIM Sampling with {total_steps} timesteps") - - iterator = tqdm(time_range, desc='DDIM Sampler', total=total_steps) - - for i, step in enumerate(iterator): - index = total_steps - i - 1 - ts = torch.full((b,), step, device=device, dtype=torch.long) - - outs = self.p_sample_ddim(img, cond, ts, pose, index=index, use_original_steps=ddim_use_original_steps, - quantize_denoised=quantize_denoised, temperature=temperature, - noise_dropout=noise_dropout, score_corrector=score_corrector, - corrector_kwargs=corrector_kwargs, - unconditional_guidance_scale=unconditional_guidance_scale, - unconditional_conditioning=unconditional_conditioning,**kwargs) - img, pred_x0 = outs - if callback: callback(i) - if img_callback: img_callback(pred_x0, i) - - if index % log_every_t == 0 or index == total_steps - 1: - intermediates['x_inter'].append(img) - intermediates['pred_x0'].append(pred_x0) - - return img, intermediates - - @torch.no_grad() - def p_sample_ddim(self, x, c, t, pose, index, repeat_noise=False, use_original_steps=False, quantize_denoised=False, - temperature=1., noise_dropout=0., score_corrector=None, corrector_kwargs=None, - unconditional_guidance_scale=1., unconditional_conditioning=None,**kwargs): - b, *_, device = *x.shape, x.device - - if 'test_model_kwargs' in kwargs: - kwargs=kwargs['test_model_kwargs'] - x = torch.cat([x, kwargs['inpaint_image'], kwargs['inpaint_mask']],dim=1) - elif 'rest' in kwargs: - x = torch.cat((x, kwargs['rest']), dim=1) - else: - raise Exception("kwargs must contain either 'test_model_kwargs' or 'rest' key") - if unconditional_conditioning is None or unconditional_guidance_scale == 1.: - reference_clip = self.model.cond_stage_model.encode(c) - reference_clip= self.model.proj_out(reference_clip) - dino = self.model.dinov2_vitl14(c,is_training=True) - dino1 = dino["x_norm_clstoken"].unsqueeze(1) - dino2 = dino["x_norm_patchtokens"] - reference_dino = torch.cat((dino1, dino2), dim=1) - reference_dino = self.model.linear(reference_dino) - control = self.model.control_model(x, pose, t, reference_dino) - e_t = self.model.model(x, t, reference_clip, control) - else: - x_in = torch.cat([x] * 2) - t_in = torch.cat([t] * 2) - c_in = torch.cat([unconditional_conditioning, c]) - e_t_uncond, e_t = self.model.apply_model(x_in, t_in, c_in).chunk(2) - e_t = e_t_uncond + unconditional_guidance_scale * (e_t - e_t_uncond) - - if score_corrector is not None: - assert self.model.parameterization == "eps" - e_t = score_corrector.modify_score(self.model, e_t, x, t, c, **corrector_kwargs) - - alphas = self.model.alphas_cumprod if use_original_steps else self.ddim_alphas - alphas_prev = self.model.alphas_cumprod_prev if use_original_steps else self.ddim_alphas_prev - sqrt_one_minus_alphas = self.model.sqrt_one_minus_alphas_cumprod if use_original_steps else self.ddim_sqrt_one_minus_alphas - sigmas = self.model.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas - # select parameters corresponding to the currently considered timestep - a_t = torch.full((b, 1, 1, 1), alphas[index], device=device) - a_prev = torch.full((b, 1, 1, 1), alphas_prev[index], device=device) - sigma_t = torch.full((b, 1, 1, 1), sigmas[index], device=device) - sqrt_one_minus_at = torch.full((b, 1, 1, 1), sqrt_one_minus_alphas[index],device=device) - - # current prediction for x_0 - if x.shape[1]!=4: - pred_x0 = (x[:,:4,:,:] - sqrt_one_minus_at * e_t) / a_t.sqrt() - else: - pred_x0 = (x - sqrt_one_minus_at * e_t) / a_t.sqrt() - - if quantize_denoised: - pred_x0, _, *_ = self.model.first_stage_model.quantize(pred_x0) - # direction pointing to x_t - dir_xt = (1. - a_prev - sigma_t**2).sqrt() * e_t - noise = sigma_t * noise_like(dir_xt.shape, device, repeat_noise) * temperature - if noise_dropout > 0.: - noise = torch.nn.functional.dropout(noise, p=noise_dropout) - x_prev = a_prev.sqrt() * pred_x0 + dir_xt + noise - - # noise - # noise = torch.randn_like(kwargs['inpaint_image']) - # x_noisy = self.model.q_sample(x_start=kwargs['inpaint_image'], t=t, noise=noise) - # x_prev = x_prev*(1-kwargs['inpaint_mask'])+x_noisy*(kwargs['inpaint_mask']) - - - return x_prev, pred_x0 - - @torch.no_grad() - def stochastic_encode(self, x0, t, use_original_steps=False, noise=None): - # fast, but does not allow for exact reconstruction - # t serves as an index to gather the correct alphas - if use_original_steps: - sqrt_alphas_cumprod = self.sqrt_alphas_cumprod - sqrt_one_minus_alphas_cumprod = self.sqrt_one_minus_alphas_cumprod - else: - sqrt_alphas_cumprod = torch.sqrt(self.ddim_alphas) - sqrt_one_minus_alphas_cumprod = self.ddim_sqrt_one_minus_alphas - - if noise is None: - noise = torch.randn_like(x0) - return (extract_into_tensor(sqrt_alphas_cumprod, t, x0.shape) * x0 + - extract_into_tensor(sqrt_one_minus_alphas_cumprod, t, x0.shape) * noise) - - @torch.no_grad() - def decode(self, x_latent, cond, t_start, unconditional_guidance_scale=1.0, unconditional_conditioning=None, - use_original_steps=False): - - timesteps = np.arange(self.ddpm_num_timesteps) if use_original_steps else self.ddim_timesteps - timesteps = timesteps[:t_start] - - time_range = np.flip(timesteps) - total_steps = timesteps.shape[0] - print(f"Running DDIM Sampling with {total_steps} timesteps") - - iterator = tqdm(time_range, desc='Decoding image', total=total_steps) - x_dec = x_latent - for i, step in enumerate(iterator): - index = total_steps - i - 1 - ts = torch.full((x_latent.shape[0],), step, device=x_latent.device, dtype=torch.long) - x_dec, _ = self.p_sample_ddim(x_dec, cond, ts, index=index, use_original_steps=use_original_steps, - unconditional_guidance_scale=unconditional_guidance_scale, - unconditional_conditioning=unconditional_conditioning) - return x_dec - diff --git a/ldm/models/diffusion/ddpm.py b/ldm/models/diffusion/ddpm.py deleted file mode 100644 index 5565d2abb181fb33cf659ec4e335721691c9a35a..0000000000000000000000000000000000000000 --- a/ldm/models/diffusion/ddpm.py +++ /dev/null @@ -1,143 +0,0 @@ -import torch -import einops -import torch.nn as nn -import numpy as np -import pytorch_lightning as pl -from torch.optim.lr_scheduler import LambdaLR -from einops import rearrange, repeat -from functools import partial -from torchvision.utils import make_grid -from ldm.util import default, count_params, instantiate_from_config -from ldm.modules.distributions.distributions import DiagonalGaussianDistribution -from ldm.modules.diffusionmodules.util import make_beta_schedule, extract_into_tensor -from ldm.models.diffusion.ddim import DDIMSampler -from torchvision.transforms import Resize -import random - - - -def disabled_train(self, mode=True): - return self - - -class DiffusionWrapper(pl.LightningModule): - def __init__(self, unet_config): - super().__init__() - self.diffusion_model = instantiate_from_config(unet_config) - - def forward(self, x, timesteps=None, context=None, control=None): - out = self.diffusion_model(x, timesteps, context, control) - return out - - -class DDPM(pl.LightningModule): - def __init__(self, - unet_config, - linear_start=1e-4, # 0.00085 - linear_end=2e-2, # 0.0120 - log_every_t=100, # 200 - timesteps=1000, # 1000 - image_size=256, # 32 - channels=3, # 4 - u_cond_percent=0, # 0.2 - use_ema=True, # False - beta_schedule="linear", - loss_type="l2", - clip_denoised=True, - cosine_s=8e-3, - original_elbo_weight=0., - v_posterior=0., - l_simple_weight=1., - parameterization="eps", - use_positional_encodings=False, - learn_logvar=False, - logvar_init=0.): - super().__init__() - self.parameterization = parameterization - self.cond_stage_model = None - self.clip_denoised = clip_denoised - self.log_every_t = log_every_t - self.image_size = image_size - self.channels = channels - self.u_cond_percent=u_cond_percent - self.use_positional_encodings = use_positional_encodings - self.model = DiffusionWrapper(unet_config) # 调用 UNet 模型 - - self.use_ema = use_ema - self.use_scheduler = True - self.v_posterior = v_posterior - self.original_elbo_weight = original_elbo_weight - self.l_simple_weight = l_simple_weight - self.register_schedule(beta_schedule=beta_schedule, # "linear" - timesteps=timesteps, # 1000 - linear_start=linear_start, # 0.00085 - linear_end=linear_end, # 0.0120 - cosine_s=cosine_s) # 8e-3 - self.loss_type = loss_type - self.learn_logvar = learn_logvar - self.logvar = torch.full(fill_value=logvar_init, size=(self.num_timesteps,)) - - def register_schedule(self, - beta_schedule="linear", - timesteps=1000, - linear_start=0.00085, - linear_end=0.0120, - cosine_s=8e-3): - betas = make_beta_schedule(beta_schedule, - timesteps, - linear_start=linear_start, - linear_end=linear_end, - cosine_s=cosine_s) - alphas = 1. - betas - alphas_cumprod = np.cumprod(alphas, axis=0) - alphas_cumprod_prev = np.append(1., alphas_cumprod[:-1]) - - timesteps, = betas.shape - self.num_timesteps = int(timesteps) - self.linear_start = linear_start - self.linear_end = linear_end - to_torch = partial(torch.tensor, dtype=torch.float32) - self.register_buffer('betas', to_torch(betas)) - self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod)) - self.register_buffer('alphas_cumprod_prev', to_torch(alphas_cumprod_prev)) - self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod))) - self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod))) - self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod))) - self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod))) - self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod - 1))) - posterior_variance = (1 - self.v_posterior) * betas * (1. - alphas_cumprod_prev) / (1. - alphas_cumprod) + self.v_posterior * betas - self.register_buffer('posterior_variance', to_torch(posterior_variance)) - self.register_buffer('posterior_log_variance_clipped', to_torch(np.log(np.maximum(posterior_variance, 1e-20)))) - self.register_buffer('posterior_mean_coef1', to_torch(betas * np.sqrt(alphas_cumprod_prev) / (1. - alphas_cumprod))) - self.register_buffer('posterior_mean_coef2', to_torch((1. - alphas_cumprod_prev) * np.sqrt(alphas) / (1. - alphas_cumprod))) - lvlb_weights = self.betas ** 2 / (2 * self.posterior_variance * to_torch(alphas) * (1 - self.alphas_cumprod)) - lvlb_weights[0] = lvlb_weights[1] - self.register_buffer('lvlb_weights', lvlb_weights, persistent=False) - - def get_input(self, batch): - x = batch['GT'] - mask = batch['inpaint_mask'] - inpaint = batch['inpaint_image'] - reference = batch['ref_imgs'] - hint = batch['hint'] - - x = x.to(memory_format=torch.contiguous_format).float() - mask = mask.to(memory_format=torch.contiguous_format).float() - inpaint = inpaint.to(memory_format=torch.contiguous_format).float() - reference = reference.to(memory_format=torch.contiguous_format).float() - hint = hint.to(memory_format=torch.contiguous_format).float() - - return x, inpaint, mask, reference, hint - - def q_sample(self, x_start, t, noise=None): - noise = default(noise, lambda: torch.randn_like(x_start)) - return (extract_into_tensor(self.sqrt_alphas_cumprod, t, x_start.shape) * x_start + - extract_into_tensor(self.sqrt_one_minus_alphas_cumprod, t, x_start.shape) * noise) - - def get_loss(self, pred, target, mean=True): - if mean: - loss = torch.nn.functional.mse_loss(target, pred) - else: - loss = torch.nn.functional.mse_loss(target, pred, reduction='none') - return loss - diff --git a/ldm/models/diffusion/plms.py b/ldm/models/diffusion/plms.py deleted file mode 100644 index 44c377be1474f8c3dc6195b20c462e3668ce60a4..0000000000000000000000000000000000000000 --- a/ldm/models/diffusion/plms.py +++ /dev/null @@ -1,239 +0,0 @@ -"""SAMPLING ONLY.""" - -import torch -import numpy as np -from tqdm import tqdm -from functools import partial - -from ldm.modules.diffusionmodules.util import make_ddim_sampling_parameters, make_ddim_timesteps, noise_like - - -class PLMSSampler(object): - def __init__(self, model, schedule="linear", **kwargs): - super().__init__() - self.model = model - self.ddpm_num_timesteps = model.num_timesteps - self.schedule = schedule - - def register_buffer(self, name, attr): - if type(attr) == torch.Tensor: - if attr.device != torch.device("cuda"): - attr = attr.to(torch.device("cuda")) - setattr(self, name, attr) - - def make_schedule(self, ddim_num_steps, ddim_discretize="uniform", ddim_eta=0., verbose=True): - if ddim_eta != 0: - raise ValueError('ddim_eta must be 0 for PLMS') - self.ddim_timesteps = make_ddim_timesteps(ddim_discr_method=ddim_discretize, num_ddim_timesteps=ddim_num_steps, - num_ddpm_timesteps=self.ddpm_num_timesteps,verbose=verbose) - alphas_cumprod = self.model.alphas_cumprod - assert alphas_cumprod.shape[0] == self.ddpm_num_timesteps, 'alphas have to be defined for each timestep' - to_torch = lambda x: x.clone().detach().to(torch.float32).to(self.model.device) - - self.register_buffer('betas', to_torch(self.model.betas)) - self.register_buffer('alphas_cumprod', to_torch(alphas_cumprod)) - self.register_buffer('alphas_cumprod_prev', to_torch(self.model.alphas_cumprod_prev)) - - # calculations for diffusion q(x_t | x_{t-1}) and others - self.register_buffer('sqrt_alphas_cumprod', to_torch(np.sqrt(alphas_cumprod.cpu()))) - self.register_buffer('sqrt_one_minus_alphas_cumprod', to_torch(np.sqrt(1. - alphas_cumprod.cpu()))) - self.register_buffer('log_one_minus_alphas_cumprod', to_torch(np.log(1. - alphas_cumprod.cpu()))) - self.register_buffer('sqrt_recip_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu()))) - self.register_buffer('sqrt_recipm1_alphas_cumprod', to_torch(np.sqrt(1. / alphas_cumprod.cpu() - 1))) - - # ddim sampling parameters - ddim_sigmas, ddim_alphas, ddim_alphas_prev = make_ddim_sampling_parameters(alphacums=alphas_cumprod.cpu(), - ddim_timesteps=self.ddim_timesteps, - eta=ddim_eta,verbose=verbose) - self.register_buffer('ddim_sigmas', ddim_sigmas) - self.register_buffer('ddim_alphas', ddim_alphas) - self.register_buffer('ddim_alphas_prev', ddim_alphas_prev) - self.register_buffer('ddim_sqrt_one_minus_alphas', np.sqrt(1. - ddim_alphas)) - sigmas_for_original_sampling_steps = ddim_eta * torch.sqrt( - (1 - self.alphas_cumprod_prev) / (1 - self.alphas_cumprod) * ( - 1 - self.alphas_cumprod / self.alphas_cumprod_prev)) - self.register_buffer('ddim_sigmas_for_original_num_steps', sigmas_for_original_sampling_steps) - - @torch.no_grad() - def sample(self, - S, - batch_size, - shape, - conditioning=None, - callback=None, - normals_sequence=None, - img_callback=None, - quantize_x0=False, - eta=0., - mask=None, - x0=None, - temperature=1., - noise_dropout=0., - score_corrector=None, - corrector_kwargs=None, - verbose=True, - x_T=None, - log_every_t=100, - unconditional_guidance_scale=1., - unconditional_conditioning=None, - # this has to come in the same format as the conditioning, # e.g. as encoded tokens, ... - **kwargs - ): - if conditioning is not None: - if isinstance(conditioning, dict): - cbs = conditioning[list(conditioning.keys())[0]].shape[0] - if cbs != batch_size: - print(f"Warning: Got {cbs} conditionings but batch-size is {batch_size}") - else: - if conditioning.shape[0] != batch_size: - print(f"Warning: Got {conditioning.shape[0]} conditionings but batch-size is {batch_size}") - - self.make_schedule(ddim_num_steps=S, ddim_eta=eta, verbose=verbose) - # sampling - C, H, W = shape - size = (batch_size, C, H, W) - print(f'Data shape for PLMS sampling is {size}') - - samples, intermediates = self.plms_sampling(conditioning, size, - callback=callback, - img_callback=img_callback, - quantize_denoised=quantize_x0, - mask=mask, x0=x0, - ddim_use_original_steps=False, - noise_dropout=noise_dropout, - temperature=temperature, - score_corrector=score_corrector, - corrector_kwargs=corrector_kwargs, - x_T=x_T, - log_every_t=log_every_t, - unconditional_guidance_scale=unconditional_guidance_scale, - unconditional_conditioning=unconditional_conditioning, - **kwargs - ) - return samples, intermediates - - @torch.no_grad() - def plms_sampling(self, cond, shape, - x_T=None, ddim_use_original_steps=False, - callback=None, timesteps=None, quantize_denoised=False, - mask=None, x0=None, img_callback=None, log_every_t=100, - temperature=1., noise_dropout=0., score_corrector=None, corrector_kwargs=None, - unconditional_guidance_scale=1., unconditional_conditioning=None,**kwargs): - device = self.model.betas.device - b = shape[0] - if x_T is None: - img = torch.randn(shape, device=device) - else: - img = x_T - - if timesteps is None: - timesteps = self.ddpm_num_timesteps if ddim_use_original_steps else self.ddim_timesteps - elif timesteps is not None and not ddim_use_original_steps: - subset_end = int(min(timesteps / self.ddim_timesteps.shape[0], 1) * self.ddim_timesteps.shape[0]) - 1 - timesteps = self.ddim_timesteps[:subset_end] - - intermediates = {'x_inter': [img], 'pred_x0': [img]} - time_range = list(reversed(range(0,timesteps))) if ddim_use_original_steps else np.flip(timesteps) - total_steps = timesteps if ddim_use_original_steps else timesteps.shape[0] - print(f"Running PLMS Sampling with {total_steps} timesteps") - - iterator = tqdm(time_range, desc='PLMS Sampler', total=total_steps) - old_eps = [] - - for i, step in enumerate(iterator): - index = total_steps - i - 1 - ts = torch.full((b,), step, device=device, dtype=torch.long) - ts_next = torch.full((b,), time_range[min(i + 1, len(time_range) - 1)], device=device, dtype=torch.long) - - if mask is not None: - assert x0 is not None - img_orig = self.model.q_sample(x0, ts) # TODO: deterministic forward pass? - img = img_orig * mask + (1. - mask) * img - - outs = self.p_sample_plms(img, cond, ts, index=index, use_original_steps=ddim_use_original_steps, - quantize_denoised=quantize_denoised, temperature=temperature, - noise_dropout=noise_dropout, score_corrector=score_corrector, - corrector_kwargs=corrector_kwargs, - unconditional_guidance_scale=unconditional_guidance_scale, - unconditional_conditioning=unconditional_conditioning, - old_eps=old_eps, t_next=ts_next,**kwargs) - img, pred_x0, e_t = outs - old_eps.append(e_t) - if len(old_eps) >= 4: - old_eps.pop(0) - if callback: callback(i) - if img_callback: img_callback(pred_x0, i) - - if index % log_every_t == 0 or index == total_steps - 1: - intermediates['x_inter'].append(img) - intermediates['pred_x0'].append(pred_x0) - - return img, intermediates - - @torch.no_grad() - def p_sample_plms(self, x, c, t, index, repeat_noise=False, use_original_steps=False, quantize_denoised=False, - temperature=1., noise_dropout=0., score_corrector=None, corrector_kwargs=None, - unconditional_guidance_scale=1., unconditional_conditioning=None, old_eps=None, t_next=None,**kwargs): - b, *_, device = *x.shape, x.device - def get_model_output(x, t): - if unconditional_conditioning is None or unconditional_guidance_scale == 1.: - e_t = self.model.apply_model(x, t, c) - else: - x_in = torch.cat([x] * 2) - t_in = torch.cat([t] * 2) - c_in = torch.cat([unconditional_conditioning, c]) - e_t_uncond, e_t = self.model.apply_model(x_in, t_in, c_in).chunk(2) - e_t = e_t_uncond + unconditional_guidance_scale * (e_t - e_t_uncond) - - if score_corrector is not None: - assert self.model.parameterization == "eps" - e_t = score_corrector.modify_score(self.model, e_t, x, t, c, **corrector_kwargs) - - return e_t - - alphas = self.model.alphas_cumprod if use_original_steps else self.ddim_alphas - alphas_prev = self.model.alphas_cumprod_prev if use_original_steps else self.ddim_alphas_prev - sqrt_one_minus_alphas = self.model.sqrt_one_minus_alphas_cumprod if use_original_steps else self.ddim_sqrt_one_minus_alphas - sigmas = self.model.ddim_sigmas_for_original_num_steps if use_original_steps else self.ddim_sigmas - - def get_x_prev_and_pred_x0(e_t, index): - # select parameters corresponding to the currently considered timestep - a_t = torch.full((b, 1, 1, 1), alphas[index], device=device) - a_prev = torch.full((b, 1, 1, 1), alphas_prev[index], device=device) - sigma_t = torch.full((b, 1, 1, 1), sigmas[index], device=device) - sqrt_one_minus_at = torch.full((b, 1, 1, 1), sqrt_one_minus_alphas[index],device=device) - - # current prediction for x_0 - pred_x0 = (x - sqrt_one_minus_at * e_t) / a_t.sqrt() - if quantize_denoised: - pred_x0, _, *_ = self.model.first_stage_model.quantize(pred_x0) - # direction pointing to x_t - dir_xt = (1. - a_prev - sigma_t**2).sqrt() * e_t - noise = sigma_t * noise_like(x.shape, device, repeat_noise) * temperature - if noise_dropout > 0.: - noise = torch.nn.functional.dropout(noise, p=noise_dropout) - x_prev = a_prev.sqrt() * pred_x0 + dir_xt + noise - return x_prev, pred_x0 - kwargs=kwargs['test_model_kwargs'] - print(x.shape,kwargs['inpaint_image'].shape,kwargs['inpaint_mask'].shape) - x_new=torch.cat([x,kwargs['inpaint_image'],kwargs['inpaint_mask']],dim=1) - e_t = get_model_output(x_new, t) - if len(old_eps) == 0: - # Pseudo Improved Euler (2nd order) - x_prev, pred_x0 = get_x_prev_and_pred_x0(e_t, index) - x_prev_new=torch.cat([x_prev,kwargs['inpaint_image'],kwargs['inpaint_mask']],dim=1) - e_t_next = get_model_output(x_prev_new, t_next) - e_t_prime = (e_t + e_t_next) / 2 - elif len(old_eps) == 1: - # 2nd order Pseudo Linear Multistep (Adams-Bashforth) - e_t_prime = (3 * e_t - old_eps[-1]) / 2 - elif len(old_eps) == 2: - # 3nd order Pseudo Linear Multistep (Adams-Bashforth) - e_t_prime = (23 * e_t - 16 * old_eps[-1] + 5 * old_eps[-2]) / 12 - elif len(old_eps) >= 3: - # 4nd order Pseudo Linear Multistep (Adams-Bashforth) - e_t_prime = (55 * e_t - 59 * old_eps[-1] + 37 * old_eps[-2] - 9 * old_eps[-3]) / 24 - - x_prev, pred_x0 = get_x_prev_and_pred_x0(e_t_prime, index) - - return x_prev, pred_x0, e_t diff --git a/ldm/modules/.DS_Store b/ldm/modules/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/modules/.DS_Store and /dev/null differ diff --git a/ldm/modules/__pycache__/attention.cpython-38.pyc b/ldm/modules/__pycache__/attention.cpython-38.pyc deleted file mode 100644 index a190315c6586b17ccd84ac15f376adadc1c70e40..0000000000000000000000000000000000000000 Binary files a/ldm/modules/__pycache__/attention.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/__pycache__/x_transformer.cpython-38.pyc b/ldm/modules/__pycache__/x_transformer.cpython-38.pyc deleted file mode 100644 index be465a5c9ed2b7db3eb4c0e9fbff92e636db3a99..0000000000000000000000000000000000000000 Binary files a/ldm/modules/__pycache__/x_transformer.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/attention.py b/ldm/modules/attention.py deleted file mode 100644 index 83e8d56ca33ffe6b15e04ce3ef64d0e56f2c786b..0000000000000000000000000000000000000000 --- a/ldm/modules/attention.py +++ /dev/null @@ -1,345 +0,0 @@ -from inspect import isfunction -import math -import torch -import torch.nn.functional as F -from torch import nn, einsum -from einops import rearrange, repeat - -from ldm.modules.diffusionmodules.util import checkpoint - -try: - import xformers - import xformers.ops - XFORMERS_IS_AVAILBLE = True -except: - XFORMERS_IS_AVAILBLE = False - - -def exists(val): - return val is not None - - -def uniq(arr): - return{el: True for el in arr}.keys() - - -def default(val, d): - if exists(val): - return val - return d() if isfunction(d) else d - - -def max_neg_value(t): - return -torch.finfo(t.dtype).max - - -def init_(tensor): - dim = tensor.shape[-1] - std = 1 / math.sqrt(dim) - tensor.uniform_(-std, std) - return tensor - - -# feedforward -class GEGLU(nn.Module): - def __init__(self, dim_in, dim_out): - super().__init__() - self.proj = nn.Linear(dim_in, dim_out * 2) - - def forward(self, x): - x, gate = self.proj(x).chunk(2, dim=-1) - return x * F.gelu(gate) - - -class FeedForward(nn.Module): - def __init__(self, dim, dim_out=None, mult=4, glu=False, dropout=0.): - super().__init__() - inner_dim = int(dim * mult) - dim_out = default(dim_out, dim) - project_in = nn.Sequential( - nn.Linear(dim, inner_dim), - nn.GELU() - ) if not glu else GEGLU(dim, inner_dim) - - self.net = nn.Sequential( - project_in, - nn.Dropout(dropout), - nn.Linear(inner_dim, dim_out) - ) - - def forward(self, x): - return self.net(x) - - -def zero_module(module): - """ - Zero out the parameters of a module and return it. - """ - for p in module.parameters(): - p.detach().zero_() - return module - - -def Normalize(in_channels): - return torch.nn.GroupNorm(num_groups=32, num_channels=in_channels, eps=1e-6, affine=True) - - -class LinearAttention(nn.Module): - def __init__(self, dim, heads=4, dim_head=32): - super().__init__() - self.heads = heads - hidden_dim = dim_head * heads - self.to_qkv = nn.Conv2d(dim, hidden_dim * 3, 1, bias = False) - self.to_out = nn.Conv2d(hidden_dim, dim, 1) - - def forward(self, x): - b, c, h, w = x.shape - qkv = self.to_qkv(x) - q, k, v = rearrange(qkv, 'b (qkv heads c) h w -> qkv b heads c (h w)', heads = self.heads, qkv=3) - k = k.softmax(dim=-1) - context = torch.einsum('bhdn,bhen->bhde', k, v) - out = torch.einsum('bhde,bhdn->bhen', context, q) - out = rearrange(out, 'b heads c (h w) -> b (heads c) h w', heads=self.heads, h=h, w=w) - return self.to_out(out) - - -class SpatialSelfAttention(nn.Module): - def __init__(self, in_channels): - super().__init__() - self.in_channels = in_channels - - self.norm = Normalize(in_channels) - self.q = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.k = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.v = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.proj_out = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - - def forward(self, x): - h_ = x - h_ = self.norm(h_) - q = self.q(h_) - k = self.k(h_) - v = self.v(h_) - - # compute attention - b,c,h,w = q.shape - q = rearrange(q, 'b c h w -> b (h w) c') - k = rearrange(k, 'b c h w -> b c (h w)') - w_ = torch.einsum('bij,bjk->bik', q, k) - - w_ = w_ * (int(c)**(-0.5)) - w_ = torch.nn.functional.softmax(w_, dim=2) - - # attend to values - v = rearrange(v, 'b c h w -> b c (h w)') - w_ = rearrange(w_, 'b i j -> b j i') - h_ = torch.einsum('bij,bjk->bik', v, w_) - h_ = rearrange(h_, 'b c (h w) -> b c h w', h=h) - h_ = self.proj_out(h_) - - return x+h_ - - -class CrossAttention(nn.Module): - def __init__(self, query_dim, context_dim=None, heads=8, dim_head=64, dropout=0.): - super().__init__() - inner_dim = dim_head * heads - context_dim = default(context_dim, query_dim) - - self.scale = dim_head ** -0.5 - self.heads = heads - - self.to_q = nn.Linear(query_dim, inner_dim, bias=False) - self.to_k = nn.Linear(context_dim, inner_dim, bias=False) - self.to_v = nn.Linear(context_dim, inner_dim, bias=False) - - self.to_out = nn.Sequential( - nn.Linear(inner_dim, query_dim), - nn.Dropout(dropout) - ) - - def forward(self, x, context=None, mask=None): - h = self.heads - - q = self.to_q(x) - context = default(context, x) - k = self.to_k(context) - v = self.to_v(context) - - q, k, v = map(lambda t: rearrange(t, 'b n (h d) -> (b h) n d', h=h), (q, k, v)) - - sim = einsum('b i d, b j d -> b i j', q, k) * self.scale - - if exists(mask): - mask = rearrange(mask, 'b ... -> b (...)') - max_neg_value = -torch.finfo(sim.dtype).max - mask = repeat(mask, 'b j -> (b h) () j', h=h) - sim.masked_fill_(~mask, max_neg_value) - - # attention, what we cannot get enough of - attn = sim.softmax(dim=-1) - - out = einsum('b i j, b j d -> b i d', attn, v) - out = rearrange(out, '(b h) n d -> b n (h d)', h=h) - return self.to_out(out) - - -class MemoryEfficientCrossAttention(nn.Module): - # https://github.com/MatthieuTPHR/diffusers/blob/d80b531ff8060ec1ea982b65a1b8df70f73aa67c/src/diffusers/models/attention.py#L223 - def __init__(self, query_dim, context_dim=None, heads=8, dim_head=64, dropout=0.0): - super().__init__() - print(f"Setting up {self.__class__.__name__}. Query dim is {query_dim}, context_dim is {context_dim} and using " - f"{heads} heads.") - inner_dim = dim_head * heads - context_dim = default(context_dim, query_dim) - - self.heads = heads - self.dim_head = dim_head - - self.to_q = nn.Linear(query_dim, inner_dim, bias=False) - self.to_k = nn.Linear(context_dim, inner_dim, bias=False) - self.to_v = nn.Linear(context_dim, inner_dim, bias=False) - - self.to_out = nn.Sequential(nn.Linear(inner_dim, query_dim), nn.Dropout(dropout)) - self.attention_op: Optional[Any] = None - - def forward(self, x, context=None, mask=None): - q = self.to_q(x) - context = default(context, x) - k = self.to_k(context) - v = self.to_v(context) - - b, _, _ = q.shape - q, k, v = map( - lambda t: t.unsqueeze(3) - .reshape(b, t.shape[1], self.heads, self.dim_head) - .permute(0, 2, 1, 3) - .reshape(b * self.heads, t.shape[1], self.dim_head) - .contiguous(), - (q, k, v), - ) - - # actually compute the attention, what we cannot get enough of - out = xformers.ops.memory_efficient_attention(q, k, v, attn_bias=None, op=self.attention_op) - - if exists(mask): - raise NotImplementedError - out = ( - out.unsqueeze(0) - .reshape(b, self.heads, out.shape[1], self.dim_head) - .permute(0, 2, 1, 3) - .reshape(b, out.shape[1], self.heads * self.dim_head) - ) - return self.to_out(out) - -class BasicTransformerBlock(nn.Module): - ATTENTION_MODES = { - "softmax": CrossAttention, # vanilla attention - "softmax-xformers": MemoryEfficientCrossAttention - } - def __init__(self, dim, n_heads, d_head, dropout=0., context_dim=None, gated_ff=True, checkpoint=True, - disable_self_attn=False): - super().__init__() - attn_mode = "softmax-xformers" if XFORMERS_IS_AVAILBLE else "softmax" - assert attn_mode in self.ATTENTION_MODES - attn_cls = self.ATTENTION_MODES[attn_mode] - self.disable_self_attn = disable_self_attn - self.attn1 = attn_cls(query_dim=dim, heads=n_heads, dim_head=d_head, dropout=dropout, - context_dim=context_dim if self.disable_self_attn else None) # is a self-attention if not self.disable_self_attn - self.ff = FeedForward(dim, dropout=dropout, glu=gated_ff) - self.attn2 = attn_cls(query_dim=dim, context_dim=context_dim, - heads=n_heads, dim_head=d_head, dropout=dropout) # is self-attn if context is none - self.norm1 = nn.LayerNorm(dim) - self.norm2 = nn.LayerNorm(dim) - self.norm3 = nn.LayerNorm(dim) - self.checkpoint = checkpoint - - def forward(self, x, context=None): - return checkpoint(self._forward, (x, context), self.parameters(), self.checkpoint) - - def _forward(self, x, context=None): - x = self.attn1(self.norm1(x), context=context if self.disable_self_attn else None) + x - x = self.attn2(self.norm2(x), context=context) + x - x = self.ff(self.norm3(x)) + x - return x - - -class SpatialTransformer(nn.Module): - """ - Transformer block for image-like data. - First, project the input (aka embedding) - and reshape to b, t, d. - Then apply standard transformer action. - Finally, reshape to image - NEW: use_linear for more efficiency instead of the 1x1 convs - """ - def __init__(self, in_channels, n_heads, d_head, - depth=1, dropout=0., context_dim=None, - disable_self_attn=False, use_linear=False, - use_checkpoint=True): - super().__init__() - if exists(context_dim) and not isinstance(context_dim, list): - context_dim = [context_dim] - self.in_channels = in_channels - inner_dim = n_heads * d_head - self.norm = Normalize(in_channels) - if not use_linear: - self.proj_in = nn.Conv2d(in_channels, - inner_dim, - kernel_size=1, - stride=1, - padding=0) - else: - self.proj_in = nn.Linear(in_channels, inner_dim) - - self.transformer_blocks = nn.ModuleList( - [BasicTransformerBlock(inner_dim, n_heads, d_head, dropout=dropout, context_dim=context_dim[d], - disable_self_attn=disable_self_attn, checkpoint=use_checkpoint) - for d in range(depth)] - ) - if not use_linear: - self.proj_out = zero_module(nn.Conv2d(inner_dim, - in_channels, - kernel_size=1, - stride=1, - padding=0)) - else: - self.proj_out = zero_module(nn.Linear(in_channels, inner_dim)) - self.use_linear = use_linear - - def forward(self, x, context=None): - # note: if no context is given, cross-attention defaults to self-attention - if not isinstance(context, list): - context = [context] - b, c, h, w = x.shape - x_in = x - x = self.norm(x) - if not self.use_linear: - x = self.proj_in(x) - x = rearrange(x, 'b c h w -> b (h w) c').contiguous() - if self.use_linear: - x = self.proj_in(x) - for i, block in enumerate(self.transformer_blocks): - x = block(x, context=context[i]) - if self.use_linear: - x = self.proj_out(x) - x = rearrange(x, 'b (h w) c -> b c h w', h=h, w=w).contiguous() - if not self.use_linear: - x = self.proj_out(x) - return x + x_in \ No newline at end of file diff --git a/ldm/modules/diffusionmodules/.DS_Store b/ldm/modules/diffusionmodules/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/modules/diffusionmodules/.DS_Store and /dev/null differ diff --git a/ldm/modules/diffusionmodules/__init__.py b/ldm/modules/diffusionmodules/__init__.py deleted file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000 diff --git a/ldm/modules/diffusionmodules/__pycache__/__init__.cpython-38.pyc b/ldm/modules/diffusionmodules/__pycache__/__init__.cpython-38.pyc deleted file mode 100644 index 6ec06b49c745519cbc153aa945c921ef6636b502..0000000000000000000000000000000000000000 Binary files a/ldm/modules/diffusionmodules/__pycache__/__init__.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/diffusionmodules/__pycache__/model.cpython-38.pyc b/ldm/modules/diffusionmodules/__pycache__/model.cpython-38.pyc deleted file mode 100644 index 175906996f2806f7901cebfe5ff682af512f5356..0000000000000000000000000000000000000000 Binary files a/ldm/modules/diffusionmodules/__pycache__/model.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/diffusionmodules/__pycache__/openaimodel.cpython-38.pyc b/ldm/modules/diffusionmodules/__pycache__/openaimodel.cpython-38.pyc deleted file mode 100644 index 8b7b41a9270b520b2cf853748da723a36c38b599..0000000000000000000000000000000000000000 Binary files a/ldm/modules/diffusionmodules/__pycache__/openaimodel.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/diffusionmodules/__pycache__/util.cpython-38.pyc b/ldm/modules/diffusionmodules/__pycache__/util.cpython-38.pyc deleted file mode 100644 index cbbe43900552e2b3a5f658abb322f53228797377..0000000000000000000000000000000000000000 Binary files a/ldm/modules/diffusionmodules/__pycache__/util.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/diffusionmodules/model.py b/ldm/modules/diffusionmodules/model.py deleted file mode 100644 index 4f5ad2f07702e8907a6b81454efc00e3879c8528..0000000000000000000000000000000000000000 --- a/ldm/modules/diffusionmodules/model.py +++ /dev/null @@ -1,835 +0,0 @@ -# pytorch_diffusion + derived encoder decoder -import math -import torch -import torch.nn as nn -import numpy as np -from einops import rearrange - -from ldm.util import instantiate_from_config -from ldm.modules.attention import LinearAttention - - -def get_timestep_embedding(timesteps, embedding_dim): - """ - This matches the implementation in Denoising Diffusion Probabilistic Models: - From Fairseq. - Build sinusoidal embeddings. - This matches the implementation in tensor2tensor, but differs slightly - from the description in Section 3.5 of "Attention Is All You Need". - """ - assert len(timesteps.shape) == 1 - - half_dim = embedding_dim // 2 - emb = math.log(10000) / (half_dim - 1) - emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb) - emb = emb.to(device=timesteps.device) - emb = timesteps.float()[:, None] * emb[None, :] - emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1) - if embedding_dim % 2 == 1: # zero pad - emb = torch.nn.functional.pad(emb, (0,1,0,0)) - return emb - - -def nonlinearity(x): - # swish - return x*torch.sigmoid(x) - - -def Normalize(in_channels, num_groups=32): - return torch.nn.GroupNorm(num_groups=num_groups, num_channels=in_channels, eps=1e-6, affine=True) - - -class Upsample(nn.Module): - def __init__(self, in_channels, with_conv): - super().__init__() - self.with_conv = with_conv - if self.with_conv: - self.conv = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, x): - x = torch.nn.functional.interpolate(x, scale_factor=2.0, mode="nearest") - if self.with_conv: - x = self.conv(x) - return x - - -class Downsample(nn.Module): - def __init__(self, in_channels, with_conv): - super().__init__() - self.with_conv = with_conv - if self.with_conv: - # no asymmetric padding in torch conv, must do it ourselves - self.conv = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=3, - stride=2, - padding=0) - - def forward(self, x): - if self.with_conv: - pad = (0,1,0,1) - x = torch.nn.functional.pad(x, pad, mode="constant", value=0) - x = self.conv(x) - else: - x = torch.nn.functional.avg_pool2d(x, kernel_size=2, stride=2) - return x - - -class ResnetBlock(nn.Module): - def __init__(self, *, in_channels, out_channels=None, conv_shortcut=False, - dropout, temb_channels=512): - super().__init__() - self.in_channels = in_channels - out_channels = in_channels if out_channels is None else out_channels - self.out_channels = out_channels - self.use_conv_shortcut = conv_shortcut - - self.norm1 = Normalize(in_channels) - self.conv1 = torch.nn.Conv2d(in_channels, - out_channels, - kernel_size=3, - stride=1, - padding=1) - if temb_channels > 0: - self.temb_proj = torch.nn.Linear(temb_channels, - out_channels) - self.norm2 = Normalize(out_channels) - self.dropout = torch.nn.Dropout(dropout) - self.conv2 = torch.nn.Conv2d(out_channels, - out_channels, - kernel_size=3, - stride=1, - padding=1) - if self.in_channels != self.out_channels: - if self.use_conv_shortcut: - self.conv_shortcut = torch.nn.Conv2d(in_channels, - out_channels, - kernel_size=3, - stride=1, - padding=1) - else: - self.nin_shortcut = torch.nn.Conv2d(in_channels, - out_channels, - kernel_size=1, - stride=1, - padding=0) - - def forward(self, x, temb): - h = x - h = self.norm1(h) - h = nonlinearity(h) - h = self.conv1(h) - - if temb is not None: - h = h + self.temb_proj(nonlinearity(temb))[:,:,None,None] - - h = self.norm2(h) - h = nonlinearity(h) - h = self.dropout(h) - h = self.conv2(h) - - if self.in_channels != self.out_channels: - if self.use_conv_shortcut: - x = self.conv_shortcut(x) - else: - x = self.nin_shortcut(x) - - return x+h - - -class LinAttnBlock(LinearAttention): - """to match AttnBlock usage""" - def __init__(self, in_channels): - super().__init__(dim=in_channels, heads=1, dim_head=in_channels) - - -class AttnBlock(nn.Module): - def __init__(self, in_channels): - super().__init__() - self.in_channels = in_channels - - self.norm = Normalize(in_channels) - self.q = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.k = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.v = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - self.proj_out = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=1, - stride=1, - padding=0) - - - def forward(self, x): - h_ = x - h_ = self.norm(h_) - q = self.q(h_) - k = self.k(h_) - v = self.v(h_) - - # compute attention - b,c,h,w = q.shape - q = q.reshape(b,c,h*w) - q = q.permute(0,2,1) # b,hw,c - k = k.reshape(b,c,h*w) # b,c,hw - w_ = torch.bmm(q,k) # b,hw,hw w[b,i,j]=sum_c q[b,i,c]k[b,c,j] - w_ = w_ * (int(c)**(-0.5)) - w_ = torch.nn.functional.softmax(w_, dim=2) - - # attend to values - v = v.reshape(b,c,h*w) - w_ = w_.permute(0,2,1) # b,hw,hw (first hw of k, second of q) - h_ = torch.bmm(v,w_) # b, c,hw (hw of q) h_[b,c,j] = sum_i v[b,c,i] w_[b,i,j] - h_ = h_.reshape(b,c,h,w) - - h_ = self.proj_out(h_) - - return x+h_ - - -def make_attn(in_channels, attn_type="vanilla"): - assert attn_type in ["vanilla", "linear", "none"], f'attn_type {attn_type} unknown' - print(f"making attention of type '{attn_type}' with {in_channels} in_channels") - if attn_type == "vanilla": - return AttnBlock(in_channels) - elif attn_type == "none": - return nn.Identity(in_channels) - else: - return LinAttnBlock(in_channels) - - -class Model(nn.Module): - def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks, - attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels, - resolution, use_timestep=True, use_linear_attn=False, attn_type="vanilla"): - super().__init__() - if use_linear_attn: attn_type = "linear" - self.ch = ch - self.temb_ch = self.ch*4 - self.num_resolutions = len(ch_mult) - self.num_res_blocks = num_res_blocks - self.resolution = resolution - self.in_channels = in_channels - - self.use_timestep = use_timestep - if self.use_timestep: - # timestep embedding - self.temb = nn.Module() - self.temb.dense = nn.ModuleList([ - torch.nn.Linear(self.ch, - self.temb_ch), - torch.nn.Linear(self.temb_ch, - self.temb_ch), - ]) - - # downsampling - self.conv_in = torch.nn.Conv2d(in_channels, - self.ch, - kernel_size=3, - stride=1, - padding=1) - - curr_res = resolution - in_ch_mult = (1,)+tuple(ch_mult) - self.down = nn.ModuleList() - for i_level in range(self.num_resolutions): - block = nn.ModuleList() - attn = nn.ModuleList() - block_in = ch*in_ch_mult[i_level] - block_out = ch*ch_mult[i_level] - for i_block in range(self.num_res_blocks): - block.append(ResnetBlock(in_channels=block_in, - out_channels=block_out, - temb_channels=self.temb_ch, - dropout=dropout)) - block_in = block_out - if curr_res in attn_resolutions: - attn.append(make_attn(block_in, attn_type=attn_type)) - down = nn.Module() - down.block = block - down.attn = attn - if i_level != self.num_resolutions-1: - down.downsample = Downsample(block_in, resamp_with_conv) - curr_res = curr_res // 2 - self.down.append(down) - - # middle - self.mid = nn.Module() - self.mid.block_1 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - self.mid.attn_1 = make_attn(block_in, attn_type=attn_type) - self.mid.block_2 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - - # upsampling - self.up = nn.ModuleList() - for i_level in reversed(range(self.num_resolutions)): - block = nn.ModuleList() - attn = nn.ModuleList() - block_out = ch*ch_mult[i_level] - skip_in = ch*ch_mult[i_level] - for i_block in range(self.num_res_blocks+1): - if i_block == self.num_res_blocks: - skip_in = ch*in_ch_mult[i_level] - block.append(ResnetBlock(in_channels=block_in+skip_in, - out_channels=block_out, - temb_channels=self.temb_ch, - dropout=dropout)) - block_in = block_out - if curr_res in attn_resolutions: - attn.append(make_attn(block_in, attn_type=attn_type)) - up = nn.Module() - up.block = block - up.attn = attn - if i_level != 0: - up.upsample = Upsample(block_in, resamp_with_conv) - curr_res = curr_res * 2 - self.up.insert(0, up) # prepend to get consistent order - - # end - self.norm_out = Normalize(block_in) - self.conv_out = torch.nn.Conv2d(block_in, - out_ch, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, x, t=None, context=None): - #assert x.shape[2] == x.shape[3] == self.resolution - if context is not None: - # assume aligned context, cat along channel axis - x = torch.cat((x, context), dim=1) - if self.use_timestep: - # timestep embedding - assert t is not None - temb = get_timestep_embedding(t, self.ch) - temb = self.temb.dense[0](temb) - temb = nonlinearity(temb) - temb = self.temb.dense[1](temb) - else: - temb = None - - # downsampling - hs = [self.conv_in(x)] - for i_level in range(self.num_resolutions): - for i_block in range(self.num_res_blocks): - h = self.down[i_level].block[i_block](hs[-1], temb) - if len(self.down[i_level].attn) > 0: - h = self.down[i_level].attn[i_block](h) - hs.append(h) - if i_level != self.num_resolutions-1: - hs.append(self.down[i_level].downsample(hs[-1])) - - # middle - h = hs[-1] - h = self.mid.block_1(h, temb) - h = self.mid.attn_1(h) - h = self.mid.block_2(h, temb) - - # upsampling - for i_level in reversed(range(self.num_resolutions)): - for i_block in range(self.num_res_blocks+1): - h = self.up[i_level].block[i_block]( - torch.cat([h, hs.pop()], dim=1), temb) - if len(self.up[i_level].attn) > 0: - h = self.up[i_level].attn[i_block](h) - if i_level != 0: - h = self.up[i_level].upsample(h) - - # end - h = self.norm_out(h) - h = nonlinearity(h) - h = self.conv_out(h) - return h - - def get_last_layer(self): - return self.conv_out.weight - - -class Encoder(nn.Module): - def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks, - attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels, - resolution, z_channels, double_z=True, use_linear_attn=False, attn_type="vanilla", - **ignore_kwargs): - super().__init__() - if use_linear_attn: attn_type = "linear" - self.ch = ch - self.temb_ch = 0 - self.num_resolutions = len(ch_mult) - self.num_res_blocks = num_res_blocks - self.resolution = resolution - self.in_channels = in_channels - - # downsampling - self.conv_in = torch.nn.Conv2d(in_channels, - self.ch, - kernel_size=3, - stride=1, - padding=1) - - curr_res = resolution - in_ch_mult = (1,)+tuple(ch_mult) - self.in_ch_mult = in_ch_mult - self.down = nn.ModuleList() - for i_level in range(self.num_resolutions): - block = nn.ModuleList() - attn = nn.ModuleList() - block_in = ch*in_ch_mult[i_level] - block_out = ch*ch_mult[i_level] - for i_block in range(self.num_res_blocks): - block.append(ResnetBlock(in_channels=block_in, - out_channels=block_out, - temb_channels=self.temb_ch, - dropout=dropout)) - block_in = block_out - if curr_res in attn_resolutions: - attn.append(make_attn(block_in, attn_type=attn_type)) - down = nn.Module() - down.block = block - down.attn = attn - if i_level != self.num_resolutions-1: - down.downsample = Downsample(block_in, resamp_with_conv) - curr_res = curr_res // 2 - self.down.append(down) - - # middle - self.mid = nn.Module() - self.mid.block_1 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - self.mid.attn_1 = make_attn(block_in, attn_type=attn_type) - self.mid.block_2 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - - # end - self.norm_out = Normalize(block_in) - self.conv_out = torch.nn.Conv2d(block_in, - 2*z_channels if double_z else z_channels, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, x): - # timestep embedding - temb = None - - # downsampling - hs = [self.conv_in(x)] - for i_level in range(self.num_resolutions): - for i_block in range(self.num_res_blocks): - h = self.down[i_level].block[i_block](hs[-1], temb) - if len(self.down[i_level].attn) > 0: - h = self.down[i_level].attn[i_block](h) - hs.append(h) - if i_level != self.num_resolutions-1: - hs.append(self.down[i_level].downsample(hs[-1])) - - # middle - h = hs[-1] - h = self.mid.block_1(h, temb) - h = self.mid.attn_1(h) - h = self.mid.block_2(h, temb) - - # end - h = self.norm_out(h) - h = nonlinearity(h) - h = self.conv_out(h) - return h - - -class Decoder(nn.Module): - def __init__(self, *, ch, out_ch, ch_mult=(1,2,4,8), num_res_blocks, - attn_resolutions, dropout=0.0, resamp_with_conv=True, in_channels, - resolution, z_channels, give_pre_end=False, tanh_out=False, use_linear_attn=False, - attn_type="vanilla", **ignorekwargs): - super().__init__() - if use_linear_attn: attn_type = "linear" - self.ch = ch - self.temb_ch = 0 - self.num_resolutions = len(ch_mult) - self.num_res_blocks = num_res_blocks - self.resolution = resolution - self.in_channels = in_channels - self.give_pre_end = give_pre_end - self.tanh_out = tanh_out - - # compute in_ch_mult, block_in and curr_res at lowest res - in_ch_mult = (1,)+tuple(ch_mult) - block_in = ch*ch_mult[self.num_resolutions-1] - curr_res = resolution // 2**(self.num_resolutions-1) - self.z_shape = (1,z_channels,curr_res,curr_res) - print("Working with z of shape {} = {} dimensions.".format( - self.z_shape, np.prod(self.z_shape))) - - # z to block_in - self.conv_in = torch.nn.Conv2d(z_channels, - block_in, - kernel_size=3, - stride=1, - padding=1) - - # middle - self.mid = nn.Module() - self.mid.block_1 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - self.mid.attn_1 = make_attn(block_in, attn_type=attn_type) - self.mid.block_2 = ResnetBlock(in_channels=block_in, - out_channels=block_in, - temb_channels=self.temb_ch, - dropout=dropout) - - # upsampling - self.up = nn.ModuleList() - for i_level in reversed(range(self.num_resolutions)): - block = nn.ModuleList() - attn = nn.ModuleList() - block_out = ch*ch_mult[i_level] - for i_block in range(self.num_res_blocks+1): - block.append(ResnetBlock(in_channels=block_in, - out_channels=block_out, - temb_channels=self.temb_ch, - dropout=dropout)) - block_in = block_out - if curr_res in attn_resolutions: - attn.append(make_attn(block_in, attn_type=attn_type)) - up = nn.Module() - up.block = block - up.attn = attn - if i_level != 0: - up.upsample = Upsample(block_in, resamp_with_conv) - curr_res = curr_res * 2 - self.up.insert(0, up) # prepend to get consistent order - - # end - self.norm_out = Normalize(block_in) - self.conv_out = torch.nn.Conv2d(block_in, - out_ch, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, z): - #assert z.shape[1:] == self.z_shape[1:] - self.last_z_shape = z.shape - - # timestep embedding - temb = None - - # z to block_in - h = self.conv_in(z) - - # middle - h = self.mid.block_1(h, temb) - h = self.mid.attn_1(h) - h = self.mid.block_2(h, temb) - - # upsampling - for i_level in reversed(range(self.num_resolutions)): - for i_block in range(self.num_res_blocks+1): - h = self.up[i_level].block[i_block](h, temb) - if len(self.up[i_level].attn) > 0: - h = self.up[i_level].attn[i_block](h) - if i_level != 0: - h = self.up[i_level].upsample(h) - - # end - if self.give_pre_end: - return h - - h = self.norm_out(h) - h = nonlinearity(h) - h = self.conv_out(h) - if self.tanh_out: - h = torch.tanh(h) - return h - - -class SimpleDecoder(nn.Module): - def __init__(self, in_channels, out_channels, *args, **kwargs): - super().__init__() - self.model = nn.ModuleList([nn.Conv2d(in_channels, in_channels, 1), - ResnetBlock(in_channels=in_channels, - out_channels=2 * in_channels, - temb_channels=0, dropout=0.0), - ResnetBlock(in_channels=2 * in_channels, - out_channels=4 * in_channels, - temb_channels=0, dropout=0.0), - ResnetBlock(in_channels=4 * in_channels, - out_channels=2 * in_channels, - temb_channels=0, dropout=0.0), - nn.Conv2d(2*in_channels, in_channels, 1), - Upsample(in_channels, with_conv=True)]) - # end - self.norm_out = Normalize(in_channels) - self.conv_out = torch.nn.Conv2d(in_channels, - out_channels, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, x): - for i, layer in enumerate(self.model): - if i in [1,2,3]: - x = layer(x, None) - else: - x = layer(x) - - h = self.norm_out(x) - h = nonlinearity(h) - x = self.conv_out(h) - return x - - -class UpsampleDecoder(nn.Module): - def __init__(self, in_channels, out_channels, ch, num_res_blocks, resolution, - ch_mult=(2,2), dropout=0.0): - super().__init__() - # upsampling - self.temb_ch = 0 - self.num_resolutions = len(ch_mult) - self.num_res_blocks = num_res_blocks - block_in = in_channels - curr_res = resolution // 2 ** (self.num_resolutions - 1) - self.res_blocks = nn.ModuleList() - self.upsample_blocks = nn.ModuleList() - for i_level in range(self.num_resolutions): - res_block = [] - block_out = ch * ch_mult[i_level] - for i_block in range(self.num_res_blocks + 1): - res_block.append(ResnetBlock(in_channels=block_in, - out_channels=block_out, - temb_channels=self.temb_ch, - dropout=dropout)) - block_in = block_out - self.res_blocks.append(nn.ModuleList(res_block)) - if i_level != self.num_resolutions - 1: - self.upsample_blocks.append(Upsample(block_in, True)) - curr_res = curr_res * 2 - - # end - self.norm_out = Normalize(block_in) - self.conv_out = torch.nn.Conv2d(block_in, - out_channels, - kernel_size=3, - stride=1, - padding=1) - - def forward(self, x): - # upsampling - h = x - for k, i_level in enumerate(range(self.num_resolutions)): - for i_block in range(self.num_res_blocks + 1): - h = self.res_blocks[i_level][i_block](h, None) - if i_level != self.num_resolutions - 1: - h = self.upsample_blocks[k](h) - h = self.norm_out(h) - h = nonlinearity(h) - h = self.conv_out(h) - return h - - -class LatentRescaler(nn.Module): - def __init__(self, factor, in_channels, mid_channels, out_channels, depth=2): - super().__init__() - # residual block, interpolate, residual block - self.factor = factor - self.conv_in = nn.Conv2d(in_channels, - mid_channels, - kernel_size=3, - stride=1, - padding=1) - self.res_block1 = nn.ModuleList([ResnetBlock(in_channels=mid_channels, - out_channels=mid_channels, - temb_channels=0, - dropout=0.0) for _ in range(depth)]) - self.attn = AttnBlock(mid_channels) - self.res_block2 = nn.ModuleList([ResnetBlock(in_channels=mid_channels, - out_channels=mid_channels, - temb_channels=0, - dropout=0.0) for _ in range(depth)]) - - self.conv_out = nn.Conv2d(mid_channels, - out_channels, - kernel_size=1, - ) - - def forward(self, x): - x = self.conv_in(x) - for block in self.res_block1: - x = block(x, None) - x = torch.nn.functional.interpolate(x, size=(int(round(x.shape[2]*self.factor)), int(round(x.shape[3]*self.factor)))) - x = self.attn(x) - for block in self.res_block2: - x = block(x, None) - x = self.conv_out(x) - return x - - -class MergedRescaleEncoder(nn.Module): - def __init__(self, in_channels, ch, resolution, out_ch, num_res_blocks, - attn_resolutions, dropout=0.0, resamp_with_conv=True, - ch_mult=(1,2,4,8), rescale_factor=1.0, rescale_module_depth=1): - super().__init__() - intermediate_chn = ch * ch_mult[-1] - self.encoder = Encoder(in_channels=in_channels, num_res_blocks=num_res_blocks, ch=ch, ch_mult=ch_mult, - z_channels=intermediate_chn, double_z=False, resolution=resolution, - attn_resolutions=attn_resolutions, dropout=dropout, resamp_with_conv=resamp_with_conv, - out_ch=None) - self.rescaler = LatentRescaler(factor=rescale_factor, in_channels=intermediate_chn, - mid_channels=intermediate_chn, out_channels=out_ch, depth=rescale_module_depth) - - def forward(self, x): - x = self.encoder(x) - x = self.rescaler(x) - return x - - -class MergedRescaleDecoder(nn.Module): - def __init__(self, z_channels, out_ch, resolution, num_res_blocks, attn_resolutions, ch, ch_mult=(1,2,4,8), - dropout=0.0, resamp_with_conv=True, rescale_factor=1.0, rescale_module_depth=1): - super().__init__() - tmp_chn = z_channels*ch_mult[-1] - self.decoder = Decoder(out_ch=out_ch, z_channels=tmp_chn, attn_resolutions=attn_resolutions, dropout=dropout, - resamp_with_conv=resamp_with_conv, in_channels=None, num_res_blocks=num_res_blocks, - ch_mult=ch_mult, resolution=resolution, ch=ch) - self.rescaler = LatentRescaler(factor=rescale_factor, in_channels=z_channels, mid_channels=tmp_chn, - out_channels=tmp_chn, depth=rescale_module_depth) - - def forward(self, x): - x = self.rescaler(x) - x = self.decoder(x) - return x - - -class Upsampler(nn.Module): - def __init__(self, in_size, out_size, in_channels, out_channels, ch_mult=2): - super().__init__() - assert out_size >= in_size - num_blocks = int(np.log2(out_size//in_size))+1 - factor_up = 1.+ (out_size % in_size) - print(f"Building {self.__class__.__name__} with in_size: {in_size} --> out_size {out_size} and factor {factor_up}") - self.rescaler = LatentRescaler(factor=factor_up, in_channels=in_channels, mid_channels=2*in_channels, - out_channels=in_channels) - self.decoder = Decoder(out_ch=out_channels, resolution=out_size, z_channels=in_channels, num_res_blocks=2, - attn_resolutions=[], in_channels=None, ch=in_channels, - ch_mult=[ch_mult for _ in range(num_blocks)]) - - def forward(self, x): - x = self.rescaler(x) - x = self.decoder(x) - return x - - -class Resize(nn.Module): - def __init__(self, in_channels=None, learned=False, mode="bilinear"): - super().__init__() - self.with_conv = learned - self.mode = mode - if self.with_conv: - print(f"Note: {self.__class__.__name} uses learned downsampling and will ignore the fixed {mode} mode") - raise NotImplementedError() - assert in_channels is not None - # no asymmetric padding in torch conv, must do it ourselves - self.conv = torch.nn.Conv2d(in_channels, - in_channels, - kernel_size=4, - stride=2, - padding=1) - - def forward(self, x, scale_factor=1.0): - if scale_factor==1.0: - return x - else: - x = torch.nn.functional.interpolate(x, mode=self.mode, align_corners=False, scale_factor=scale_factor) - return x - -class FirstStagePostProcessor(nn.Module): - - def __init__(self, ch_mult:list, in_channels, - pretrained_model:nn.Module=None, - reshape=False, - n_channels=None, - dropout=0., - pretrained_config=None): - super().__init__() - if pretrained_config is None: - assert pretrained_model is not None, 'Either "pretrained_model" or "pretrained_config" must not be None' - self.pretrained_model = pretrained_model - else: - assert pretrained_config is not None, 'Either "pretrained_model" or "pretrained_config" must not be None' - self.instantiate_pretrained(pretrained_config) - - self.do_reshape = reshape - - if n_channels is None: - n_channels = self.pretrained_model.encoder.ch - - self.proj_norm = Normalize(in_channels,num_groups=in_channels//2) - self.proj = nn.Conv2d(in_channels,n_channels,kernel_size=3, - stride=1,padding=1) - - blocks = [] - downs = [] - ch_in = n_channels - for m in ch_mult: - blocks.append(ResnetBlock(in_channels=ch_in,out_channels=m*n_channels,dropout=dropout)) - ch_in = m * n_channels - downs.append(Downsample(ch_in, with_conv=False)) - - self.model = nn.ModuleList(blocks) - self.downsampler = nn.ModuleList(downs) - - - def instantiate_pretrained(self, config): - model = instantiate_from_config(config) - self.pretrained_model = model.eval() - # self.pretrained_model.train = False - for param in self.pretrained_model.parameters(): - param.requires_grad = False - - - @torch.no_grad() - def encode_with_pretrained(self,x): - c = self.pretrained_model.encode(x) - if isinstance(c, DiagonalGaussianDistribution): - c = c.mode() - return c - - def forward(self,x): - z_fs = self.encode_with_pretrained(x) - z = self.proj_norm(z_fs) - z = self.proj(z) - z = nonlinearity(z) - - for submodel, downmodel in zip(self.model,self.downsampler): - z = submodel(z,temb=None) - z = downmodel(z) - - if self.do_reshape: - z = rearrange(z,'b c h w -> b (h w) c') - return z - diff --git a/ldm/modules/diffusionmodules/openaimodel.py b/ldm/modules/diffusionmodules/openaimodel.py deleted file mode 100644 index a4fe35b942c0c35e65190aa1ddc8eab8f942b31e..0000000000000000000000000000000000000000 --- a/ldm/modules/diffusionmodules/openaimodel.py +++ /dev/null @@ -1,707 +0,0 @@ -from abc import abstractmethod -from functools import partial -import math -from typing import Iterable - -import numpy as np -import torch as th -import torch.nn as nn -import torch.nn.functional as F - -from ldm.modules.diffusionmodules.util import ( - checkpoint, - conv_nd, - linear, - avg_pool_nd, - zero_module, - normalization, - timestep_embedding, -) -from ldm.modules.attention import SpatialTransformer - - -# dummy replace -def convert_module_to_f16(x): - pass - -def convert_module_to_f32(x): - pass - - -## go -class AttentionPool2d(nn.Module): - """ - Adapted from CLIP: https://github.com/openai/CLIP/blob/main/clip/model.py - """ - - def __init__( - self, - spacial_dim: int, - embed_dim: int, - num_heads_channels: int, - output_dim: int = None, - ): - super().__init__() - self.positional_embedding = nn.Parameter(th.randn(embed_dim, spacial_dim ** 2 + 1) / embed_dim ** 0.5) - self.qkv_proj = conv_nd(1, embed_dim, 3 * embed_dim, 1) - self.c_proj = conv_nd(1, embed_dim, output_dim or embed_dim, 1) - self.num_heads = embed_dim // num_heads_channels - self.attention = QKVAttention(self.num_heads) - - def forward(self, x): - b, c, *_spatial = x.shape - x = x.reshape(b, c, -1) # NC(HW) - x = th.cat([x.mean(dim=-1, keepdim=True), x], dim=-1) # NC(HW+1) - x = x + self.positional_embedding[None, :, :].to(x.dtype) # NC(HW+1) - x = self.qkv_proj(x) - x = self.attention(x) - x = self.c_proj(x) - return x[:, :, 0] - - -class TimestepBlock(nn.Module): - @abstractmethod - def forward(self, x, emb): - """ - Apply the module to `x` given `emb` timestep embeddings. - """ - - -class TimestepEmbedSequential(nn.Sequential, TimestepBlock): - def forward(self, x, emb, context=None): - for layer in self: - if isinstance(layer, TimestepBlock): - x = layer(x, emb) - elif isinstance(layer, SpatialTransformer): - x = layer(x, context) - else: - x = layer(x) - return x - - -class Upsample(nn.Module): - """ - An upsampling layer with an optional convolution. - :param channels: channels in the inputs and outputs. - :param use_conv: a bool determining if a convolution is applied. - :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then - upsampling occurs in the inner-two dimensions. - """ - - def __init__(self, channels, use_conv, dims=2, out_channels=None, padding=1): - super().__init__() - self.channels = channels - self.out_channels = out_channels or channels - self.use_conv = use_conv - self.dims = dims - if use_conv: - self.conv = conv_nd(dims, self.channels, self.out_channels, 3, padding=padding) - - def forward(self, x): - assert x.shape[1] == self.channels - if self.dims == 3: - x = F.interpolate( - x, (x.shape[2], x.shape[3] * 2, x.shape[4] * 2), mode="nearest" - ) - else: - x = F.interpolate(x, scale_factor=2, mode="nearest") - if self.use_conv: - x = self.conv(x) - return x - -class TransposedUpsample(nn.Module): - 'Learned 2x upsampling without padding' - def __init__(self, channels, out_channels=None, ks=5): - super().__init__() - self.channels = channels - self.out_channels = out_channels or channels - - self.up = nn.ConvTranspose2d(self.channels,self.out_channels,kernel_size=ks,stride=2) - - def forward(self,x): - return self.up(x) - - -class Downsample(nn.Module): - """ - A downsampling layer with an optional convolution. - :param channels: channels in the inputs and outputs. - :param use_conv: a bool determining if a convolution is applied. - :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then - downsampling occurs in the inner-two dimensions. - """ - - def __init__(self, channels, use_conv, dims=2, out_channels=None,padding=1): - super().__init__() - self.channels = channels - self.out_channels = out_channels or channels - self.use_conv = use_conv - self.dims = dims - stride = 2 if dims != 3 else (1, 2, 2) - if use_conv: - self.op = conv_nd( - dims, self.channels, self.out_channels, 3, stride=stride, padding=padding - ) - else: - assert self.channels == self.out_channels - self.op = avg_pool_nd(dims, kernel_size=stride, stride=stride) - - def forward(self, x): - assert x.shape[1] == self.channels - return self.op(x) - - -class ResBlock(TimestepBlock): - def __init__( - self, - channels, - emb_channels, - dropout, - out_channels=None, - use_conv=False, - use_scale_shift_norm=False, - dims=2, - use_checkpoint=False, - up=False, - down=False, - ): - super().__init__() - self.channels = channels - self.emb_channels = emb_channels - self.dropout = dropout - self.out_channels = out_channels or channels - self.use_conv = use_conv - self.use_checkpoint = use_checkpoint - self.use_scale_shift_norm = use_scale_shift_norm - - self.in_layers = nn.Sequential( - normalization(channels), - nn.SiLU(), - conv_nd(dims, channels, self.out_channels, 3, padding=1), - ) - - self.updown = up or down - - if up: - self.h_upd = Upsample(channels, False, dims) - self.x_upd = Upsample(channels, False, dims) - elif down: - self.h_upd = Downsample(channels, False, dims) - self.x_upd = Downsample(channels, False, dims) - else: - self.h_upd = self.x_upd = nn.Identity() - - self.emb_layers = nn.Sequential( - nn.SiLU(), - linear( - emb_channels, - 2 * self.out_channels if use_scale_shift_norm else self.out_channels, - ), - ) - self.out_layers = nn.Sequential( - normalization(self.out_channels), - nn.SiLU(), - nn.Dropout(p=dropout), - zero_module( - conv_nd(dims, self.out_channels, self.out_channels, 3, padding=1) - ), - ) - - if self.out_channels == channels: - self.skip_connection = nn.Identity() - elif use_conv: - self.skip_connection = conv_nd( - dims, channels, self.out_channels, 3, padding=1 - ) - else: - self.skip_connection = conv_nd(dims, channels, self.out_channels, 1) - - def forward(self, x, emb): - """ - Apply the block to a Tensor, conditioned on a timestep embedding. - :param x: an [N x C x ...] Tensor of features. - :param emb: an [N x emb_channels] Tensor of timestep embeddings. - :return: an [N x C x ...] Tensor of outputs. - """ - return checkpoint( - self._forward, (x, emb), self.parameters(), self.use_checkpoint - ) - - - def _forward(self, x, emb): - if self.updown: - in_rest, in_conv = self.in_layers[:-1], self.in_layers[-1] - h = in_rest(x) - h = self.h_upd(h) - x = self.x_upd(x) - h = in_conv(h) - else: - h = self.in_layers(x) - emb_out = self.emb_layers(emb).type(h.dtype) - while len(emb_out.shape) < len(h.shape): - emb_out = emb_out[..., None] - if self.use_scale_shift_norm: - out_norm, out_rest = self.out_layers[0], self.out_layers[1:] - scale, shift = th.chunk(emb_out, 2, dim=1) - h = out_norm(h) * (1 + scale) + shift - h = out_rest(h) - else: - h = h + emb_out - h = self.out_layers(h) - return self.skip_connection(x) + h - - -class My_ResBlock(TimestepBlock): - """ - A residual block that can optionally change the number of channels. - :param channels: the number of input channels. - :param emb_channels: the number of timestep embedding channels. - :param dropout: the rate of dropout. - :param out_channels: if specified, the number of out channels. - :param use_conv: if True and out_channels is specified, use a spatial - convolution instead of a smaller 1x1 convolution to change the - channels in the skip connection. - :param dims: determines if the signal is 1D, 2D, or 3D. - :param use_checkpoint: if True, use gradient checkpointing on this module. - :param up: if True, use this block for upsampling. - :param down: if True, use this block for downsampling. - """ - - def __init__( - self, - channels, - emb_channels, - dropout, - out_channels=None, - use_conv=False, - use_scale_shift_norm=False, - dims=2, - use_checkpoint=False, - up=False, - down=False, - ): - super().__init__() - self.channels = channels - self.emb_channels = emb_channels - self.dropout = dropout - self.out_channels = out_channels or channels - self.use_conv = use_conv - self.use_checkpoint = use_checkpoint - self.use_scale_shift_norm = use_scale_shift_norm - - self.in_layers = nn.Sequential( - normalization(channels), - nn.SiLU(), - conv_nd(dims, channels, self.out_channels, 3, padding=1), - ) - - self.updown = up or down - - if up: - self.h_upd = Upsample(channels, False, dims) - self.x_upd = Upsample(channels, False, dims) - elif down: - self.h_upd = Downsample(channels, False, dims) - self.x_upd = Downsample(channels, False, dims) - else: - self.h_upd = self.x_upd = nn.Identity() - - self.emb_layers = nn.Sequential( - nn.SiLU(), - linear( - emb_channels, - 2 * self.out_channels if use_scale_shift_norm else self.out_channels, - ), - ) - self.out_layers = nn.Sequential( - normalization(self.out_channels), - nn.SiLU(), - nn.Dropout(p=dropout), - zero_module( - conv_nd(dims, self.out_channels, 4, 3, padding=1) - ), - ) - - if self.out_channels == channels: - self.skip_connection = nn.Identity() - elif use_conv: - self.skip_connection = conv_nd( - dims, channels, self.out_channels, 3, padding=1 - ) - else: - self.skip_connection = conv_nd(dims, channels, 4, 1) - - def forward(self, x, emb): - """ - Apply the block to a Tensor, conditioned on a timestep embedding. - :param x: an [N x C x ...] Tensor of features. - :param emb: an [N x emb_channels] Tensor of timestep embeddings. - :return: an [N x C x ...] Tensor of outputs. - """ - return checkpoint( - self._forward, (x, emb), self.parameters(), self.use_checkpoint - ) - - - def _forward(self, x, emb): - if self.updown: - in_rest, in_conv = self.in_layers[:-1], self.in_layers[-1] - h = in_rest(x) - h = self.h_upd(h) - x = self.x_upd(x) - h = in_conv(h) - else: - h = self.in_layers(x) - emb_out = self.emb_layers(emb).type(h.dtype) - while len(emb_out.shape) < len(h.shape): - emb_out = emb_out[..., None] - if self.use_scale_shift_norm: - out_norm, out_rest = self.out_layers[0], self.out_layers[1:] - scale, shift = th.chunk(emb_out, 2, dim=1) - h = out_norm(h) * (1 + scale) + shift - h = out_rest(h) - else: - h = h + emb_out - h = self.out_layers(h) - return h - - -class AttentionBlock(nn.Module): - """ - An attention block that allows spatial positions to attend to each other. - Originally ported from here, but adapted to the N-d case. - https://github.com/hojonathanho/diffusion/blob/1e0dceb3b3495bbe19116a5e1b3596cd0706c543/diffusion_tf/models/unet.py#L66. - """ - - def __init__( - self, - channels, - num_heads=1, - num_head_channels=-1, - use_checkpoint=False, - use_new_attention_order=False, - ): - super().__init__() - self.channels = channels - if num_head_channels == -1: - self.num_heads = num_heads - else: - assert ( - channels % num_head_channels == 0 - ), f"q,k,v channels {channels} is not divisible by num_head_channels {num_head_channels}" - self.num_heads = channels // num_head_channels - self.use_checkpoint = use_checkpoint - self.norm = normalization(channels) - self.qkv = conv_nd(1, channels, channels * 3, 1) - if use_new_attention_order: - # split qkv before split heads - self.attention = QKVAttention(self.num_heads) - else: - # split heads before split qkv - self.attention = QKVAttentionLegacy(self.num_heads) - - self.proj_out = zero_module(conv_nd(1, channels, channels, 1)) - - def forward(self, x): - return checkpoint(self._forward, (x,), self.parameters(), True) # TODO: check checkpoint usage, is True # TODO: fix the .half call!!! - #return pt_checkpoint(self._forward, x) # pytorch - - def _forward(self, x): - b, c, *spatial = x.shape - x = x.reshape(b, c, -1) - qkv = self.qkv(self.norm(x)) - h = self.attention(qkv) - h = self.proj_out(h) - return (x + h).reshape(b, c, *spatial) - - -def count_flops_attn(model, _x, y): - """ - A counter for the `thop` package to count the operations in an - attention operation. - Meant to be used like: - macs, params = thop.profile( - model, - inputs=(inputs, timestamps), - custom_ops={QKVAttention: QKVAttention.count_flops}, - ) - """ - b, c, *spatial = y[0].shape - num_spatial = int(np.prod(spatial)) - # We perform two matmuls with the same number of ops. - # The first computes the weight matrix, the second computes - # the combination of the value vectors. - matmul_ops = 2 * b * (num_spatial ** 2) * c - model.total_ops += th.DoubleTensor([matmul_ops]) - - -class QKVAttentionLegacy(nn.Module): - """ - A module which performs QKV attention. Matches legacy QKVAttention + input/ouput heads shaping - """ - - def __init__(self, n_heads): - super().__init__() - self.n_heads = n_heads - - def forward(self, qkv): - """ - Apply QKV attention. - :param qkv: an [N x (H * 3 * C) x T] tensor of Qs, Ks, and Vs. - :return: an [N x (H * C) x T] tensor after attention. - """ - bs, width, length = qkv.shape - assert width % (3 * self.n_heads) == 0 - ch = width // (3 * self.n_heads) - q, k, v = qkv.reshape(bs * self.n_heads, ch * 3, length).split(ch, dim=1) - scale = 1 / math.sqrt(math.sqrt(ch)) - weight = th.einsum( - "bct,bcs->bts", q * scale, k * scale - ) # More stable with f16 than dividing afterwards - weight = th.softmax(weight.float(), dim=-1).type(weight.dtype) - a = th.einsum("bts,bcs->bct", weight, v) - return a.reshape(bs, -1, length) - - @staticmethod - def count_flops(model, _x, y): - return count_flops_attn(model, _x, y) - - -class QKVAttention(nn.Module): - """ - A module which performs QKV attention and splits in a different order. - """ - - def __init__(self, n_heads): - super().__init__() - self.n_heads = n_heads - - def forward(self, qkv): - """ - Apply QKV attention. - :param qkv: an [N x (3 * H * C) x T] tensor of Qs, Ks, and Vs. - :return: an [N x (H * C) x T] tensor after attention. - """ - bs, width, length = qkv.shape - assert width % (3 * self.n_heads) == 0 - ch = width // (3 * self.n_heads) - q, k, v = qkv.chunk(3, dim=1) - scale = 1 / math.sqrt(math.sqrt(ch)) - weight = th.einsum( - "bct,bcs->bts", - (q * scale).view(bs * self.n_heads, ch, length), - (k * scale).view(bs * self.n_heads, ch, length), - ) # More stable with f16 than dividing afterwards - weight = th.softmax(weight.float(), dim=-1).type(weight.dtype) - a = th.einsum("bts,bcs->bct", weight, v.reshape(bs * self.n_heads, ch, length)) - return a.reshape(bs, -1, length) - - @staticmethod - def count_flops(model, _x, y): - return count_flops_attn(model, _x, y) - - -class UNetModel(nn.Module): - def __init__(self, - image_size, # 32 - in_channels, # 9 - out_channels, # 4 - model_channels, # 320 - attention_resolutions, # [ 4, 2, 1 ] - num_res_blocks, # 2 - channel_mult=(1, 2, 4, 8), # [ 1, 2, 4, 4 ] - num_heads=-1, # 8 - use_spatial_transformer=False, # True - transformer_depth=1, # 1 - context_dim=None, # 768 - use_checkpoint=False, # True - legacy=True, # False - add_conv_in_front_of_unet=False, # False - dropout=0, - conv_resample=True, - dims=2, - num_classes=None, - num_head_channels=-1, - num_heads_upsample=-1, - use_scale_shift_norm=False): - - super().__init__() - - self.image_size = image_size # 32 - self.in_channels = in_channels # 9 - self.out_channels = out_channels # 4 - self.model_channels = model_channels # 320 - self.attention_resolutions = attention_resolutions # [4,2,1] - self.num_res_blocks = num_res_blocks # 2 - self.channel_mult = channel_mult # [1,2,4,4] - num_heads_upsample = num_heads # 8 - self.use_checkpoint = use_checkpoint # True - self.add_conv_in_front_of_unet=add_conv_in_front_of_unet # False - self.dropout = dropout # 0 - self.conv_resample = conv_resample # True - self.num_classes = num_classes # None - self.num_heads = num_heads # 8 - self.num_head_channels = num_head_channels # -1 - self.num_heads_upsample = num_heads_upsample # -1 - self.dtype = th.float32 - - - # 时间编码器 320 -> 320*4 -> 320*4 - time_embed_dim = model_channels * 4 - self.time_embed = nn.Sequential( - linear(model_channels, time_embed_dim), - nn.SiLU(), - linear(time_embed_dim, time_embed_dim), - ) - - - # 一阶段 self.input_blocks - self.input_blocks = nn.ModuleList( - [ - TimestepEmbedSequential( - conv_nd( - dims, # 2 - in_channels, # 9 - model_channels, # 320 - kernel_size=3, # 3 - padding=1 # 1 - ) - ) - ] - ) - - input_block_chans = [model_channels] # [320] - ch = model_channels # 320 - ds = 1 # 1 - - for level, mult in enumerate(channel_mult): # [0,1,2,3], [1,2,4,4] - for _ in range(num_res_blocks): # 2 - layers = [ - ResBlock( - ch, # [1,1,1,2,2,4,4,4]*320 - time_embed_dim, # 320*4 - dropout, # 0 - out_channels=mult * model_channels, # [1,1,2,2,4,4,4,4]*320 - dims=dims, # 2 - use_checkpoint=use_checkpoint, # True - use_scale_shift_norm=use_scale_shift_norm, # False - ) - ] - ch = mult * model_channels # [1,1,2,2,4,4,4,4]*320 - if ds in attention_resolutions: # 前6次小循环 - dim_head = ch // num_heads # [1,1,2,2,4,4]*40 - layers.append( - SpatialTransformer( - ch, # [1,1,2,2,4,4]*320 - num_heads, # 8 - dim_head, # [1,1,2,2,4,4]*40 - depth=transformer_depth, # 1 - context_dim=context_dim # 768 - ) - ) - self.input_blocks.append(TimestepEmbedSequential(*layers)) - input_block_chans.append(ch) # [1,1,2,2,4,4,4,4]*320 - if level != len(channel_mult) - 1: # 前3次大循环 - out_ch = ch # [1,2,4]*320 - self.input_blocks.append( - TimestepEmbedSequential( - Downsample( - ch, # [1,2,4]*320 - conv_resample, # True - dims=dims, # 2 - out_channels=out_ch # [1,2,4]*320 - ) - ) - ) - ch = out_ch # [1,2,4]*320 - input_block_chans.append(ch) # [1,2,4]*320 - ds *= 2 # 1 -> 2 -> 4 -> 8 - - - # 二阶段 self.middle_block - dim_head = ch // num_heads # 1280 // 8 - - self.middle_block = TimestepEmbedSequential( - ResBlock( - ch, # 4*320 - time_embed_dim, # 320 - dropout, # 0 - dims=dims, # 2 - use_checkpoint=use_checkpoint, # True - use_scale_shift_norm=use_scale_shift_norm, # False - ), - SpatialTransformer( - ch, # 4*320 - num_heads, # 8 - dim_head, # 160 - depth=transformer_depth, # 1 - context_dim=context_dim # 768 - ), - ResBlock( - ch, # 4*320 - time_embed_dim, # 320 - dropout, # 0 - dims=dims, # 2 - use_checkpoint=use_checkpoint, # True - use_scale_shift_norm=use_scale_shift_norm, # False - ), - ) - - - # 三阶段 self.output_blocks - self.output_blocks = nn.ModuleList([]) - for level, mult in list(enumerate(channel_mult))[::-1]: # [3,2,1,0], [4,4,2,1] - for i in range(num_res_blocks + 1): # 3 - ich = input_block_chans.pop() # [4,4, 4,4,4, 2,2,2, 1,1,1, 1]*320 - layers = [ - ResBlock( - ch + ich, # [4,4,4,4,4,4,4,2,2,2,1,1]*320+ich - time_embed_dim, # 320 - dropout, # 0 - out_channels=model_channels*mult, # [4,4,4,4,4,4,2,2,2,1,1,1]*320 - dims=dims, # 2 - use_checkpoint=use_checkpoint, # True - use_scale_shift_norm=use_scale_shift_norm, # False - ) - ] - ch = model_channels * mult # [4,4,4,4,4,4,2,2,2,1,1,1]*320 - if ds in attention_resolutions: # 后三次大循环 - dim_head = ch // num_heads - layers.append( - SpatialTransformer( - ch, num_heads, dim_head, depth=transformer_depth, context_dim=context_dim - ) - ) - if level and i == num_res_blocks: # 前三次大循环中每次最后的小循环 - out_ch = ch - layers.append( - Upsample(ch, conv_resample, dims=dims, out_channels=out_ch) - ) - ds //= 2 - self.output_blocks.append(TimestepEmbedSequential(*layers)) - - # 四阶段 self.out - self.out = nn.Sequential( - normalization(ch), - nn.SiLU(), - zero_module(conv_nd(dims, model_channels, out_channels, 3, padding=1)), - ) - - def forward(self, x, timesteps=None, context=None): - hs = [] - - t_emb = timestep_embedding(timesteps, self.model_channels) # [N, 320] - emb = self.time_embed(t_emb) # [N, 320*4] - h = x.type(self.dtype) # 将 x 转换为 torch.float32 - - for module in self.input_blocks: - h = module(h, emb, context) - hs.append(h) - h = self.middle_block(h, emb, context) - for module in self.output_blocks: - h = th.cat([h, hs.pop()], dim=1) - h = module(h, emb, context) - h = h.type(x.dtype) - - return self.out(h) # [N,4,H,W] - diff --git a/ldm/modules/diffusionmodules/util.py b/ldm/modules/diffusionmodules/util.py deleted file mode 100644 index 8ba85e65946d9e48a1d15f9fd8d0f851cb45d426..0000000000000000000000000000000000000000 --- a/ldm/modules/diffusionmodules/util.py +++ /dev/null @@ -1,255 +0,0 @@ -# adopted from -# https://github.com/openai/improved-diffusion/blob/main/improved_diffusion/gaussian_diffusion.py -# and -# https://github.com/lucidrains/denoising-diffusion-pytorch/blob/7706bdfc6f527f58d33f84b7b522e61e6e3164b3/denoising_diffusion_pytorch/denoising_diffusion_pytorch.py -# and -# https://github.com/openai/guided-diffusion/blob/0ba878e517b276c45d1195eb29f6f5f72659a05b/guided_diffusion/nn.py -# -# thanks! - - -import os -import math -import torch -import torch.nn as nn -import numpy as np -from einops import repeat - -from ldm.util import instantiate_from_config - - -def make_beta_schedule(schedule, n_timestep, linear_start=1e-4, linear_end=2e-2, cosine_s=8e-3): - if schedule == "linear": - betas = ( - torch.linspace(linear_start ** 0.5, linear_end ** 0.5, n_timestep, dtype=torch.float64) ** 2 - ) - - elif schedule == "cosine": - timesteps = ( - torch.arange(n_timestep + 1, dtype=torch.float64) / n_timestep + cosine_s - ) - alphas = timesteps / (1 + cosine_s) * np.pi / 2 - alphas = torch.cos(alphas).pow(2) - alphas = alphas / alphas[0] - betas = 1 - alphas[1:] / alphas[:-1] - betas = np.clip(betas, a_min=0, a_max=0.999) - - elif schedule == "sqrt_linear": - betas = torch.linspace(linear_start, linear_end, n_timestep, dtype=torch.float64) - elif schedule == "sqrt": - betas = torch.linspace(linear_start, linear_end, n_timestep, dtype=torch.float64) ** 0.5 - else: - raise ValueError(f"schedule '{schedule}' unknown.") - return betas.numpy() - - -def make_ddim_timesteps(ddim_discr_method, num_ddim_timesteps, num_ddpm_timesteps, verbose=True): - if ddim_discr_method == 'uniform': - c = num_ddpm_timesteps // num_ddim_timesteps - ddim_timesteps = np.asarray(list(range(0, num_ddpm_timesteps, c))) - elif ddim_discr_method == 'quad': - ddim_timesteps = ((np.linspace(0, np.sqrt(num_ddpm_timesteps * .8), num_ddim_timesteps)) ** 2).astype(int) - else: - raise NotImplementedError(f'There is no ddim discretization method called "{ddim_discr_method}"') - - # assert ddim_timesteps.shape[0] == num_ddim_timesteps - # add one to get the final alpha values right (the ones from first scale to data during sampling) - steps_out = ddim_timesteps + 1 - if verbose: - print(f'Selected timesteps for ddim sampler: {steps_out}') - return steps_out - - -def make_ddim_sampling_parameters(alphacums, ddim_timesteps, eta, verbose=True): - # select alphas for computing the variance schedule - alphas = alphacums[ddim_timesteps] - alphas_prev = np.asarray([alphacums[0]] + alphacums[ddim_timesteps[:-1]].tolist()) - - # according the the formula provided in https://arxiv.org/abs/2010.02502 - sigmas = eta * np.sqrt((1 - alphas_prev) / (1 - alphas) * (1 - alphas / alphas_prev)) - if verbose: - print(f'Selected alphas for ddim sampler: a_t: {alphas}; a_(t-1): {alphas_prev}') - print(f'For the chosen value of eta, which is {eta}, ' - f'this results in the following sigma_t schedule for ddim sampler {sigmas}') - return sigmas, alphas, alphas_prev - - -def betas_for_alpha_bar(num_diffusion_timesteps, alpha_bar, max_beta=0.999): - """ - Create a beta schedule that discretizes the given alpha_t_bar function, - which defines the cumulative product of (1-beta) over time from t = [0,1]. - :param num_diffusion_timesteps: the number of betas to produce. - :param alpha_bar: a lambda that takes an argument t from 0 to 1 and - produces the cumulative product of (1-beta) up to that - part of the diffusion process. - :param max_beta: the maximum beta to use; use values lower than 1 to - prevent singularities. - """ - betas = [] - for i in range(num_diffusion_timesteps): - t1 = i / num_diffusion_timesteps - t2 = (i + 1) / num_diffusion_timesteps - betas.append(min(1 - alpha_bar(t2) / alpha_bar(t1), max_beta)) - return np.array(betas) - - -def extract_into_tensor(a, t, x_shape): - b, *_ = t.shape - out = a.gather(-1, t) - return out.reshape(b, *((1,) * (len(x_shape) - 1))) - - -def checkpoint(func, inputs, params, flag): - """ - Evaluate a function without caching intermediate activations, allowing for - reduced memory at the expense of extra compute in the backward pass. - :param func: the function to evaluate. - :param inputs: the argument sequence to pass to `func`. - :param params: a sequence of parameters `func` depends on but does not - explicitly take as arguments. - :param flag: if False, disable gradient checkpointing. - """ - if flag: - args = tuple(inputs) + tuple(params) - return CheckpointFunction.apply(func, len(inputs), *args) - else: - return func(*inputs) - - -class CheckpointFunction(torch.autograd.Function): - @staticmethod - def forward(ctx, run_function, length, *args): - ctx.run_function = run_function - ctx.input_tensors = list(args[:length]) - ctx.input_params = list(args[length:]) - - with torch.no_grad(): - output_tensors = ctx.run_function(*ctx.input_tensors) - return output_tensors - - @staticmethod - def backward(ctx, *output_grads): - ctx.input_tensors = [x.detach().requires_grad_(True) for x in ctx.input_tensors] - with torch.enable_grad(): - # Fixes a bug where the first op in run_function modifies the - # Tensor storage in place, which is not allowed for detach()'d - # Tensors. - shallow_copies = [x.view_as(x) for x in ctx.input_tensors] - output_tensors = ctx.run_function(*shallow_copies) - input_grads = torch.autograd.grad( - output_tensors, - ctx.input_tensors + ctx.input_params, - output_grads, - allow_unused=True, - ) - del ctx.input_tensors - del ctx.input_params - del output_tensors - return (None, None) + input_grads - - -def timestep_embedding(timesteps, dim, max_period=10000): - half = dim // 2 # 160 - # 生成一个 shape 为 [160,] 的 torch，从 1 到 1/10000 指数衰减 - freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(device=timesteps.device) - # [1,2] * [1, 160] -> [2, 160] - args = timesteps[:, None].float() * freqs[None] - # [2, 320] - embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1) - return embedding - - -def zero_module(module): - """ - Zero out the parameters of a module and return it. - """ - for p in module.parameters(): - p.detach().zero_() - return module - - -def scale_module(module, scale): - """ - Scale the parameters of a module and return it. - """ - for p in module.parameters(): - p.detach().mul_(scale) - return module - - -def mean_flat(tensor): - """ - Take the mean over all non-batch dimensions. - """ - return tensor.mean(dim=list(range(1, len(tensor.shape)))) - - -def normalization(channels): - """ - Make a standard normalization layer. - :param channels: number of input channels. - :return: an nn.Module for normalization. - """ - return GroupNorm32(32, channels) - - -# PyTorch 1.7 has SiLU, but we support PyTorch 1.5. -class SiLU(nn.Module): - def forward(self, x): - return x * torch.sigmoid(x) - - -class GroupNorm32(nn.GroupNorm): - def forward(self, x): - return super().forward(x.float()).type(x.dtype) - -def conv_nd(dims, *args, **kwargs): - """ - Create a 1D, 2D, or 3D convolution module. - """ - if dims == 1: - return nn.Conv1d(*args, **kwargs) - elif dims == 2: - return nn.Conv2d(*args, **kwargs) - elif dims == 3: - return nn.Conv3d(*args, **kwargs) - raise ValueError(f"unsupported dimensions: {dims}") - - -def linear(*args, **kwargs): - """ - Create a linear module. - """ - return nn.Linear(*args, **kwargs) - - -def avg_pool_nd(dims, *args, **kwargs): - """ - Create a 1D, 2D, or 3D average pooling module. - """ - if dims == 1: - return nn.AvgPool1d(*args, **kwargs) - elif dims == 2: - return nn.AvgPool2d(*args, **kwargs) - elif dims == 3: - return nn.AvgPool3d(*args, **kwargs) - raise ValueError(f"unsupported dimensions: {dims}") - - -class HybridConditioner(nn.Module): - - def __init__(self, c_concat_config, c_crossattn_config): - super().__init__() - self.concat_conditioner = instantiate_from_config(c_concat_config) - self.crossattn_conditioner = instantiate_from_config(c_crossattn_config) - - def forward(self, c_concat, c_crossattn): - c_concat = self.concat_conditioner(c_concat) - c_crossattn = self.crossattn_conditioner(c_crossattn) - return {'c_concat': [c_concat], 'c_crossattn': [c_crossattn]} - - -def noise_like(shape, device, repeat=False): - repeat_noise = lambda: torch.randn((1, *shape[1:]), device=device).repeat(shape[0], *((1,) * (len(shape) - 1))) - noise = lambda: torch.randn(shape, device=device) - return repeat_noise() if repeat else noise() \ No newline at end of file diff --git a/ldm/modules/distributions/.DS_Store b/ldm/modules/distributions/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/modules/distributions/.DS_Store and /dev/null differ diff --git a/ldm/modules/distributions/__init__.py b/ldm/modules/distributions/__init__.py deleted file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000 diff --git a/ldm/modules/distributions/__pycache__/__init__.cpython-38.pyc b/ldm/modules/distributions/__pycache__/__init__.cpython-38.pyc deleted file mode 100644 index 75a4e669e41c7a7eec7958a7d9f455ce081c3f65..0000000000000000000000000000000000000000 Binary files a/ldm/modules/distributions/__pycache__/__init__.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/distributions/__pycache__/distributions.cpython-38.pyc b/ldm/modules/distributions/__pycache__/distributions.cpython-38.pyc deleted file mode 100644 index 10f7ed4eac2bb42471fc5d3e46c243196cea8f12..0000000000000000000000000000000000000000 Binary files a/ldm/modules/distributions/__pycache__/distributions.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/distributions/distributions.py b/ldm/modules/distributions/distributions.py deleted file mode 100644 index 507b82a4fd8d177727c964a4b0217bd6766ab106..0000000000000000000000000000000000000000 --- a/ldm/modules/distributions/distributions.py +++ /dev/null @@ -1,92 +0,0 @@ -import torch -import numpy as np - - -class AbstractDistribution: - def sample(self): - raise NotImplementedError() - - def mode(self): - raise NotImplementedError() - - -class DiracDistribution(AbstractDistribution): - def __init__(self, value): - self.value = value - - def sample(self): - return self.value - - def mode(self): - return self.value - - -class DiagonalGaussianDistribution(object): - def __init__(self, parameters, deterministic=False): - self.parameters = parameters - self.mean, self.logvar = torch.chunk(parameters, 2, dim=1) - self.logvar = torch.clamp(self.logvar, -30.0, 20.0) - self.deterministic = deterministic - self.std = torch.exp(0.5 * self.logvar) - self.var = torch.exp(self.logvar) - if self.deterministic: - self.var = self.std = torch.zeros_like(self.mean).to(device=self.parameters.device) - - def sample(self): - x = self.mean + self.std * torch.randn(self.mean.shape).to(device=self.parameters.device) - return x - - def kl(self, other=None): - if self.deterministic: - return torch.Tensor([0.]) - else: - if other is None: - return 0.5 * torch.sum(torch.pow(self.mean, 2) - + self.var - 1.0 - self.logvar, - dim=[1, 2, 3]) - else: - return 0.5 * torch.sum( - torch.pow(self.mean - other.mean, 2) / other.var - + self.var / other.var - 1.0 - self.logvar + other.logvar, - dim=[1, 2, 3]) - - def nll(self, sample, dims=[1,2,3]): - if self.deterministic: - return torch.Tensor([0.]) - logtwopi = np.log(2.0 * np.pi) - return 0.5 * torch.sum( - logtwopi + self.logvar + torch.pow(sample - self.mean, 2) / self.var, - dim=dims) - - def mode(self): - return self.mean - - -def normal_kl(mean1, logvar1, mean2, logvar2): - """ - source: https://github.com/openai/guided-diffusion/blob/27c20a8fab9cb472df5d6bdd6c8d11c8f430b924/guided_diffusion/losses.py#L12 - Compute the KL divergence between two gaussians. - Shapes are automatically broadcasted, so batches can be compared to - scalars, among other use cases. - """ - tensor = None - for obj in (mean1, logvar1, mean2, logvar2): - if isinstance(obj, torch.Tensor): - tensor = obj - break - assert tensor is not None, "at least one argument must be a Tensor" - - # Force variances to be Tensors. Broadcasting helps convert scalars to - # Tensors, but it does not work for torch.exp(). - logvar1, logvar2 = [ - x if isinstance(x, torch.Tensor) else torch.tensor(x).to(tensor) - for x in (logvar1, logvar2) - ] - - return 0.5 * ( - -1.0 - + logvar2 - - logvar1 - + torch.exp(logvar1 - logvar2) - + ((mean1 - mean2) ** 2) * torch.exp(-logvar2) - ) diff --git a/ldm/modules/ema.py b/ldm/modules/ema.py deleted file mode 100644 index 102a4ba7908a3dda4897e7273ef977c1ba5629ac..0000000000000000000000000000000000000000 --- a/ldm/modules/ema.py +++ /dev/null @@ -1,76 +0,0 @@ -import torch -from torch import nn - - -class LitEma(nn.Module): - def __init__(self, model, decay=0.9999, use_num_upates=True): - super().__init__() - if decay < 0.0 or decay > 1.0: - raise ValueError('Decay must be between 0 and 1') - - self.m_name2s_name = {} - self.register_buffer('decay', torch.tensor(decay, dtype=torch.float32)) - self.register_buffer('num_updates', torch.tensor(0,dtype=torch.int) if use_num_upates - else torch.tensor(-1,dtype=torch.int)) - - for name, p in model.named_parameters(): - if p.requires_grad: - #remove as '.'-character is not allowed in buffers - s_name = name.replace('.','') - self.m_name2s_name.update({name:s_name}) - self.register_buffer(s_name,p.clone().detach().data) - - self.collected_params = [] - - def forward(self,model): - decay = self.decay - - if self.num_updates >= 0: - self.num_updates += 1 - decay = min(self.decay,(1 + self.num_updates) / (10 + self.num_updates)) - - one_minus_decay = 1.0 - decay - - with torch.no_grad(): - m_param = dict(model.named_parameters()) - shadow_params = dict(self.named_buffers()) - - for key in m_param: - if m_param[key].requires_grad: - sname = self.m_name2s_name[key] - shadow_params[sname] = shadow_params[sname].type_as(m_param[key]) - shadow_params[sname].sub_(one_minus_decay * (shadow_params[sname] - m_param[key])) - else: - assert not key in self.m_name2s_name - - def copy_to(self, model): - m_param = dict(model.named_parameters()) - shadow_params = dict(self.named_buffers()) - for key in m_param: - if m_param[key].requires_grad: - m_param[key].data.copy_(shadow_params[self.m_name2s_name[key]].data) - else: - assert not key in self.m_name2s_name - - def store(self, parameters): - """ - Save the current parameters for restoring later. - Args: - parameters: Iterable of `torch.nn.Parameter`; the parameters to be - temporarily stored. - """ - self.collected_params = [param.clone() for param in parameters] - - def restore(self, parameters): - """ - Restore the parameters stored with the `store` method. - Useful to validate the model with EMA parameters without affecting the - original optimization process. Store the parameters before the - `copy_to` method. After validation (or model saving), use this to - restore the former parameters. - Args: - parameters: Iterable of `torch.nn.Parameter`; the parameters to be - updated with the stored parameters. - """ - for c_param, param in zip(self.collected_params, parameters): - param.data.copy_(c_param.data) diff --git a/ldm/modules/encoders/.DS_Store b/ldm/modules/encoders/.DS_Store deleted file mode 100644 index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000 Binary files a/ldm/modules/encoders/.DS_Store and /dev/null differ diff --git a/ldm/modules/encoders/__init__.py b/ldm/modules/encoders/__init__.py deleted file mode 100644 index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000 diff --git a/ldm/modules/encoders/__pycache__/__init__.cpython-38.pyc b/ldm/modules/encoders/__pycache__/__init__.cpython-38.pyc deleted file mode 100644 index af50b6c23ef3b34615cb211f158875194ef470ba..0000000000000000000000000000000000000000 Binary files a/ldm/modules/encoders/__pycache__/__init__.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/encoders/__pycache__/modules.cpython-38.pyc b/ldm/modules/encoders/__pycache__/modules.cpython-38.pyc deleted file mode 100644 index 919b90d43941fe7267addb3c3fd2235ab2b86253..0000000000000000000000000000000000000000 Binary files a/ldm/modules/encoders/__pycache__/modules.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/encoders/__pycache__/xf.cpython-38.pyc b/ldm/modules/encoders/__pycache__/xf.cpython-38.pyc deleted file mode 100644 index 53d75d90e87f3583acb24d8f31c88340974d12a4..0000000000000000000000000000000000000000 Binary files a/ldm/modules/encoders/__pycache__/xf.cpython-38.pyc and /dev/null differ diff --git a/ldm/modules/encoders/modules.py b/ldm/modules/encoders/modules.py deleted file mode 100644 index fb34fff636fc611025815f6a40148de39e645273..0000000000000000000000000000000000000000 --- a/ldm/modules/encoders/modules.py +++ /dev/null @@ -1,172 +0,0 @@ -import torch -import torch.nn as nn -from functools import partial -import clip -from einops import rearrange, repeat -from transformers import CLIPTokenizer, CLIPTextModel,CLIPVisionModel,CLIPModel -import kornia -from ldm.modules.x_transformer import Encoder, TransformerWrapper # TODO: can we directly rely on lucidrains code and simply add this as a reuirement? --> test -from .xf import LayerNorm, Transformer -import math - -class AbstractEncoder(nn.Module): - def __init__(self): - super().__init__() - - def encode(self, *args, **kwargs): - raise NotImplementedError - - -class ClassEmbedder(nn.Module): - def __init__(self, embed_dim, n_classes=1000, key='class'): - super().__init__() - self.key = key - self.embedding = nn.Embedding(n_classes, embed_dim) - - def forward(self, batch, key=None): - if key is None: - key = self.key - # this is for use in crossattn - c = batch[key][:, None] - c = self.embedding(c) - return c - - -class TransformerEmbedder(AbstractEncoder): - """Some transformer encoder layers""" - def __init__(self, n_embed, n_layer, vocab_size, max_seq_len=77, device="cuda"): - super().__init__() - self.device = device - self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len, - attn_layers=Encoder(dim=n_embed, depth=n_layer)) - - def forward(self, tokens): - tokens = tokens.to(self.device) # meh - z = self.transformer(tokens, return_embeddings=True) - return z - - def encode(self, x): - return self(x) - - -class BERTTokenizer(AbstractEncoder): - """ Uses a pretrained BERT tokenizer by huggingface. Vocab size: 30522 (?)""" - def __init__(self, device="cuda", vq_interface=True, max_length=77): - super().__init__() - from transformers import BertTokenizerFast # TODO: add to reuquirements - self.tokenizer = BertTokenizerFast.from_pretrained("bert-base-uncased") - self.device = device - self.vq_interface = vq_interface - self.max_length = max_length - - def forward(self, text): - batch_encoding = self.tokenizer(text, truncation=True, max_length=self.max_length, return_length=True, - return_overflowing_tokens=False, padding="max_length", return_tensors="pt") - tokens = batch_encoding["input_ids"].to(self.device) - return tokens - - @torch.no_grad() - def encode(self, text): - tokens = self(text) - if not self.vq_interface: - return tokens - return None, None, [None, None, tokens] - - def decode(self, text): - return text - - -class BERTEmbedder(AbstractEncoder): - """Uses the BERT tokenizr model and add some transformer encoder layers""" - def __init__(self, n_embed, n_layer, vocab_size=30522, max_seq_len=77, - device="cuda",use_tokenizer=True, embedding_dropout=0.0): - super().__init__() - self.use_tknz_fn = use_tokenizer - if self.use_tknz_fn: - self.tknz_fn = BERTTokenizer(vq_interface=False, max_length=max_seq_len) - self.device = device - self.transformer = TransformerWrapper(num_tokens=vocab_size, max_seq_len=max_seq_len, - attn_layers=Encoder(dim=n_embed, depth=n_layer), - emb_dropout=embedding_dropout) - - def forward(self, text): - if self.use_tknz_fn: - tokens = self.tknz_fn(text)#.to(self.device) - else: - tokens = text - z = self.transformer(tokens, return_embeddings=True) - return z - - def encode(self, text): - # output of length 77 - return self(text) - - -class SpatialRescaler(nn.Module): - def __init__(self, - n_stages=1, - method='bilinear', - multiplier=0.5, - in_channels=3, - out_channels=None, - bias=False): - super().__init__() - self.n_stages = n_stages - assert self.n_stages >= 0 - assert method in ['nearest','linear','bilinear','trilinear','bicubic','area'] - self.multiplier = multiplier - self.interpolator = partial(torch.nn.functional.interpolate, mode=method) - self.remap_output = out_channels is not None - if self.remap_output: - print(f'Spatial Rescaler mapping from {in_channels} to {out_channels} channels after resizing.') - self.channel_mapper = nn.Conv2d(in_channels,out_channels,1,bias=bias) - - def forward(self,x): - for stage in range(self.n_stages): - x = self.interpolator(x, scale_factor=self.multiplier) - - - if self.remap_output: - x = self.channel_mapper(x) - return x - - def encode(self, x): - return self(x) - - -class FrozenCLIPImageEmbedder(AbstractEncoder): - """Uses the CLIP transformer encoder for text (from Hugging Face)""" - def __init__(self, version="openai/clip-vit-large-patch14"): - super().__init__() - self.transformer = CLIPVisionModel.from_pretrained(version) - self.final_ln = LayerNorm(1024) - self.mapper = Transformer( - 1, - 1024, - 5, - 1, - ) - - self.freeze() - - def freeze(self): - self.transformer = self.transformer.eval() - for param in self.parameters(): - param.requires_grad = False - for param in self.mapper.parameters(): - param.requires_grad = True - for param in self.final_ln.parameters(): - param.requires_grad = True - - def forward(self, image): - outputs = self.transformer(pixel_values=image) - z = outputs.pooler_output - z = z.unsqueeze(1) - z = self.mapper(z) - z = self.final_ln(z) - return z - - def encode(self, image): - return self(image) - - diff --git a/ldm/modules/encoders/xf.py b/ldm/modules/encoders/xf.py deleted file mode 100644 index e7481451c0e78a6542bf65e3c842310b6f7c51e1..0000000000000000000000000000000000000000 --- a/ldm/modules/encoders/xf.py +++ /dev/null @@ -1,130 +0,0 @@ -""" -Transformer implementation adapted from CLIP ViT: -https://github.com/openai/CLIP/blob/4c0275784d6d9da97ca1f47eaaee31de1867da91/clip/model.py -""" - -import math - -import torch as th -import torch.nn as nn - - -def convert_module_to_f16(l): - """ - Convert primitive modules to float16. - """ - if isinstance(l, (nn.Linear, nn.Conv2d, nn.ConvTranspose2d)): - l.weight.data = l.weight.data.half() - if l.bias is not None: - l.bias.data = l.bias.data.half() - - -class LayerNorm(nn.LayerNorm): - """ - Implementation that supports fp16 inputs but fp32 gains/biases. - """ - - def forward(self, x: th.Tensor): - return super().forward(x.float()).to(x.dtype) - - -class MultiheadAttention(nn.Module): - def __init__(self, n_ctx, width, heads): - super().__init__() - self.n_ctx = n_ctx - self.width = width - self.heads = heads - self.c_qkv = nn.Linear(width, width * 3) - self.c_proj = nn.Linear(width, width) - self.attention = QKVMultiheadAttention(heads, n_ctx) - - def forward(self, x): - x = self.c_qkv(x) - x = self.attention(x) - x = self.c_proj(x) - return x - - -class MLP(nn.Module): - def __init__(self, width): - super().__init__() - self.width = width - self.c_fc = nn.Linear(width, width * 4) - self.c_proj = nn.Linear(width * 4, width) - self.gelu = nn.GELU() - - def forward(self, x): - return self.c_proj(self.gelu(self.c_fc(x))) - - -class QKVMultiheadAttention(nn.Module): - def __init__(self, n_heads: int, n_ctx: int): - super().__init__() - self.n_heads = n_heads - self.n_ctx = n_ctx - - def forward(self, qkv): - bs, n_ctx, width = qkv.shape - attn_ch = width // self.n_heads // 3 - scale = 1 / math.sqrt(math.sqrt(attn_ch)) - qkv = qkv.view(bs, n_ctx, self.n_heads, -1) - q, k, v = th.split(qkv, attn_ch, dim=-1) - weight = th.einsum( - "bthc,bshc->bhts", q * scale, k * scale - ) # More stable with f16 than dividing afterwards - wdtype = weight.dtype - weight = th.softmax(weight.float(), dim=-1).type(wdtype) - return th.einsum("bhts,bshc->bthc", weight, v).reshape(bs, n_ctx, -1) - - -class ResidualAttentionBlock(nn.Module): - def __init__( - self, - n_ctx: int, - width: int, - heads: int, - ): - super().__init__() - - self.attn = MultiheadAttention( - n_ctx, - width, - heads, - ) - self.ln_1 = LayerNorm(width) - self.mlp = MLP(width) - self.ln_2 = LayerNorm(width) - - def forward(self, x: th.Tensor): - x = x + self.attn(self.ln_1(x)) - x = x + self.mlp(self.ln_2(x)) - return x - - -class Transformer(nn.Module): - def __init__( - self, - n_ctx: int, - width: int, - layers: int, - heads: int, - ): - super().__init__() - self.n_ctx = n_ctx - self.width = width - self.layers = layers - self.resblocks = nn.ModuleList( - [ - ResidualAttentionBlock( - n_ctx, - width, - heads, - ) - for _ in range(layers) - ] - ) - - def forward(self, x: th.Tensor): - for block in self.resblocks: - x = block(x) - return x diff --git a/ldm/modules/losses/contperceptual.py b/ldm/modules/losses/contperceptual.py deleted file mode 100644 index ad1b1abd93a3721605331d96e2010b65f5e853a2..0000000000000000000000000000000000000000 --- a/ldm/modules/losses/contperceptual.py +++ /dev/null @@ -1,111 +0,0 @@ -import torch -import torch.nn as nn - -from taming.modules.losses.vqperceptual import * # TODO: taming dependency yes/no? - - -class LPIPSWithDiscriminator(nn.Module): - def __init__(self, disc_start, logvar_init=0.0, kl_weight=1.0, pixelloss_weight=1.0, - disc_num_layers=3, disc_in_channels=3, disc_factor=1.0, disc_weight=1.0, - perceptual_weight=1.0, use_actnorm=False, disc_conditional=False, - disc_loss="hinge"): - - super().__init__() - assert disc_loss in ["hinge", "vanilla"] - self.kl_weight = kl_weight - self.pixel_weight = pixelloss_weight - self.perceptual_loss = LPIPS().eval() - self.perceptual_weight = perceptual_weight - # output log variance - self.logvar = nn.Parameter(torch.ones(size=()) * logvar_init) - - self.discriminator = NLayerDiscriminator(input_nc=disc_in_channels, - n_layers=disc_num_layers, - use_actnorm=use_actnorm - ).apply(weights_init) - self.discriminator_iter_start = disc_start - self.disc_loss = hinge_d_loss if disc_loss == "hinge" else vanilla_d_loss - self.disc_factor = disc_factor - self.discriminator_weight = disc_weight - self.disc_conditional = disc_conditional - - def calculate_adaptive_weight(self, nll_loss, g_loss, last_layer=None): - if last_layer is not None: - nll_grads = torch.autograd.grad(nll_loss, last_layer, retain_graph=True)[0] - g_grads = torch.autograd.grad(g_loss, last_layer, retain_graph=True)[0] - else: - nll_grads = torch.autograd.grad(nll_loss, self.last_layer[0], retain_graph=True)[0] - g_grads = torch.autograd.grad(g_loss, self.last_layer[0], retain_graph=True)[0] - - d_weight = torch.norm(nll_grads) / (torch.norm(g_grads) + 1e-4) - d_weight = torch.clamp(d_weight, 0.0, 1e4).detach() - d_weight = d_weight * self.discriminator_weight - return d_weight - - def forward(self, inputs, reconstructions, posteriors, optimizer_idx, - global_step, last_layer=None, cond=None, split="train", - weights=None): - rec_loss = torch.abs(inputs.contiguous() - reconstructions.contiguous()) - if self.perceptual_weight > 0: - p_loss = self.perceptual_loss(inputs.contiguous(), reconstructions.contiguous()) - rec_loss = rec_loss + self.perceptual_weight * p_loss - - nll_loss = rec_loss / torch.exp(self.logvar) + self.logvar - weighted_nll_loss = nll_loss - if weights is not None: - weighted_nll_loss = weights*nll_loss - weighted_nll_loss = torch.sum(weighted_nll_loss) / weighted_nll_loss.shape[0] - nll_loss = torch.sum(nll_loss) / nll_loss.shape[0] - kl_loss = posteriors.kl() - kl_loss = torch.sum(kl_loss) / kl_loss.shape[0] - - # now the GAN part - if optimizer_idx == 0: - # generator update - if cond is None: - assert not self.disc_conditional - logits_fake = self.discriminator(reconstructions.contiguous()) - else: - assert self.disc_conditional - logits_fake = self.discriminator(torch.cat((reconstructions.contiguous(), cond), dim=1)) - g_loss = -torch.mean(logits_fake) - - if self.disc_factor > 0.0: - try: - d_weight = self.calculate_adaptive_weight(nll_loss, g_loss, last_layer=last_layer) - except RuntimeError: - assert not self.training - d_weight = torch.tensor(0.0) - else: - d_weight = torch.tensor(0.0) - - disc_factor = adopt_weight(self.disc_factor, global_step, threshold=self.discriminator_iter_start) - loss = weighted_nll_loss + self.kl_weight * kl_loss + d_weight * disc_factor * g_loss - - log = {"{}/total_loss".format(split): loss.clone().detach().mean(), "{}/logvar".format(split): self.logvar.detach(), - "{}/kl_loss".format(split): kl_loss.detach().mean(), "{}/nll_loss".format(split): nll_loss.detach().mean(), - "{}/rec_loss".format(split): rec_loss.detach().mean(), - "{}/d_weight".format(split): d_weight.detach(), - "{}/disc_factor".format(split): torch.tensor(disc_factor), - "{}/g_loss".format(split): g_loss.detach().mean(), - } - return loss, log - - if optimizer_idx == 1: - # second pass for discriminator update - if cond is None: - logits_real = self.discriminator(inputs.contiguous().detach()) - logits_fake = self.discriminator(reconstructions.contiguous().detach()) - else: - logits_real = self.discriminator(torch.cat((inputs.contiguous().detach(), cond), dim=1)) - logits_fake = self.discriminator(torch.cat((reconstructions.contiguous().detach(), cond), dim=1)) - - disc_factor = adopt_weight(self.disc_factor, global_step, threshold=self.discriminator_iter_start) - d_loss = disc_factor * self.disc_loss(logits_real, logits_fake) - - log = {"{}/disc_loss".format(split): d_loss.clone().detach().mean(), - "{}/logits_real".format(split): logits_real.detach().mean(), - "{}/logits_fake".format(split): logits_fake.detach().mean() - } - return d_loss, log - diff --git a/ldm/modules/losses/vqperceptual.py b/ldm/modules/losses/vqperceptual.py deleted file mode 100644 index aba4acddf455d162a4a0b091a7cc5f82a920789c..0000000000000000000000000000000000000000 --- a/ldm/modules/losses/vqperceptual.py +++ /dev/null @@ -1,167 +0,0 @@ -import torch -from torch import nn -import torch.nn.functional as F -from einops import repeat - -from taming.modules.discriminator.model import NLayerDiscriminator, weights_init -from taming.modules.losses.lpips import LPIPS -from taming.modules.losses.vqperceptual import hinge_d_loss, vanilla_d_loss - - -def hinge_d_loss_with_exemplar_weights(logits_real, logits_fake, weights): - assert weights.shape[0] == logits_real.shape[0] == logits_fake.shape[0] - loss_real = torch.mean(F.relu(1. - logits_real), dim=[1,2,3]) - loss_fake = torch.mean(F.relu(1. + logits_fake), dim=[1,2,3]) - loss_real = (weights * loss_real).sum() / weights.sum() - loss_fake = (weights * loss_fake).sum() / weights.sum() - d_loss = 0.5 * (loss_real + loss_fake) - return d_loss - -def adopt_weight(weight, global_step, threshold=0, value=0.): - if global_step < threshold: - weight = value - return weight - - -def measure_perplexity(predicted_indices, n_embed): - # src: https://github.com/karpathy/deep-vector-quantization/blob/main/model.py - # eval cluster perplexity. when perplexity == num_embeddings then all clusters are used exactly equally - encodings = F.one_hot(predicted_indices, n_embed).float().reshape(-1, n_embed) - avg_probs = encodings.mean(0) - perplexity = (-(avg_probs * torch.log(avg_probs + 1e-10)).sum()).exp() - cluster_use = torch.sum(avg_probs > 0) - return perplexity, cluster_use - -def l1(x, y): - return torch.abs(x-y) - - -def l2(x, y): - return torch.pow((x-y), 2) - - -class VQLPIPSWithDiscriminator(nn.Module): - def __init__(self, disc_start, codebook_weight=1.0, pixelloss_weight=1.0, - disc_num_layers=3, disc_in_channels=3, disc_factor=1.0, disc_weight=1.0, - perceptual_weight=1.0, use_actnorm=False, disc_conditional=False, - disc_ndf=64, disc_loss="hinge", n_classes=None, perceptual_loss="lpips", - pixel_loss="l1"): - super().__init__() - assert disc_loss in ["hinge", "vanilla"] - assert perceptual_loss in ["lpips", "clips", "dists"] - assert pixel_loss in ["l1", "l2"] - self.codebook_weight = codebook_weight - self.pixel_weight = pixelloss_weight - if perceptual_loss == "lpips": - print(f"{self.__class__.__name__}: Running with LPIPS.") - self.perceptual_loss = LPIPS().eval() - else: - raise ValueError(f"Unknown perceptual loss: >> {perceptual_loss} <<") - self.perceptual_weight = perceptual_weight - - if pixel_loss == "l1": - self.pixel_loss = l1 - else: - self.pixel_loss = l2 - - self.discriminator = NLayerDiscriminator(input_nc=disc_in_channels, - n_layers=disc_num_layers, - use_actnorm=use_actnorm, - ndf=disc_ndf - ).apply(weights_init) - self.discriminator_iter_start = disc_start - if disc_loss == "hinge": - self.disc_loss = hinge_d_loss - elif disc_loss == "vanilla": - self.disc_loss = vanilla_d_loss - else: - raise ValueError(f"Unknown GAN loss '{disc_loss}'.") - print(f"VQLPIPSWithDiscriminator running with {disc_loss} loss.") - self.disc_factor = disc_factor - self.discriminator_weight = disc_weight - self.disc_conditional = disc_conditional - self.n_classes = n_classes - - def calculate_adaptive_weight(self, nll_loss, g_loss, last_layer=None): - if last_layer is not None: - nll_grads = torch.autograd.grad(nll_loss, last_layer, retain_graph=True)[0] - g_grads = torch.autograd.grad(g_loss, last_layer, retain_graph=True)[0] - else: - nll_grads = torch.autograd.grad(nll_loss, self.last_layer[0], retain_graph=True)[0] - g_grads = torch.autograd.grad(g_loss, self.last_layer[0], retain_graph=True)[0] - - d_weight = torch.norm(nll_grads) / (torch.norm(g_grads) + 1e-4) - d_weight = torch.clamp(d_weight, 0.0, 1e4).detach() - d_weight = d_weight * self.discriminator_weight - return d_weight - - def forward(self, codebook_loss, inputs, reconstructions, optimizer_idx, - global_step, last_layer=None, cond=None, split="train", predicted_indices=None): - if not exists(codebook_loss): - codebook_loss = torch.tensor([0.]).to(inputs.device) - #rec_loss = torch.abs(inputs.contiguous() - reconstructions.contiguous()) - rec_loss = self.pixel_loss(inputs.contiguous(), reconstructions.contiguous()) - if self.perceptual_weight > 0: - p_loss = self.perceptual_loss(inputs.contiguous(), reconstructions.contiguous()) - rec_loss = rec_loss + self.perceptual_weight * p_loss - else: - p_loss = torch.tensor([0.0]) - - nll_loss = rec_loss - #nll_loss = torch.sum(nll_loss) / nll_loss.shape[0] - nll_loss = torch.mean(nll_loss) - - # now the GAN part - if optimizer_idx == 0: - # generator update - if cond is None: - assert not self.disc_conditional - logits_fake = self.discriminator(reconstructions.contiguous()) - else: - assert self.disc_conditional - logits_fake = self.discriminator(torch.cat((reconstructions.contiguous(), cond), dim=1)) - g_loss = -torch.mean(logits_fake) - - try: - d_weight = self.calculate_adaptive_weight(nll_loss, g_loss, last_layer=last_layer) - except RuntimeError: - assert not self.training - d_weight = torch.tensor(0.0) - - disc_factor = adopt_weight(self.disc_factor, global_step, threshold=self.discriminator_iter_start) - loss = nll_loss + d_weight * disc_factor * g_loss + self.codebook_weight * codebook_loss.mean() - - log = {"{}/total_loss".format(split): loss.clone().detach().mean(), - "{}/quant_loss".format(split): codebook_loss.detach().mean(), - "{}/nll_loss".format(split): nll_loss.detach().mean(), - "{}/rec_loss".format(split): rec_loss.detach().mean(), - "{}/p_loss".format(split): p_loss.detach().mean(), - "{}/d_weight".format(split): d_weight.detach(), - "{}/disc_factor".format(split): torch.tensor(disc_factor), - "{}/g_loss".format(split): g_loss.detach().mean(), - } - if predicted_indices is not None: - assert self.n_classes is not None - with torch.no_grad(): - perplexity, cluster_usage = measure_perplexity(predicted_indices, self.n_classes) - log[f"{split}/perplexity"] = perplexity - log[f"{split}/cluster_usage"] = cluster_usage - return loss, log - - if optimizer_idx == 1: - # second pass for discriminator update - if cond is None: - logits_real = self.discriminator(inputs.contiguous().detach()) - logits_fake = self.discriminator(reconstructions.contiguous().detach()) - else: - logits_real = self.discriminator(torch.cat((inputs.contiguous().detach(), cond), dim=1)) - logits_fake = self.discriminator(torch.cat((reconstructions.contiguous().detach(), cond), dim=1)) - - disc_factor = adopt_weight(self.disc_factor, global_step, threshold=self.discriminator_iter_start) - d_loss = disc_factor * self.disc_loss(logits_real, logits_fake) - - log = {"{}/disc_loss".format(split): d_loss.clone().detach().mean(), - "{}/logits_real".format(split): logits_real.detach().mean(), - "{}/logits_fake".format(split): logits_fake.detach().mean() - } - return d_loss, log diff --git a/ldm/modules/x_transformer.py b/ldm/modules/x_transformer.py deleted file mode 100644 index 0c7a4d4f2bd89ce015bc7896e73b55772e508a66..0000000000000000000000000000000000000000 --- a/ldm/modules/x_transformer.py +++ /dev/null @@ -1,641 +0,0 @@ -"""shout-out to https://github.com/lucidrains/x-transformers/tree/main/x_transformers""" -import torch -from torch import nn, einsum -import torch.nn.functional as F -from functools import partial -from inspect import isfunction -from collections import namedtuple -from einops import rearrange, repeat, reduce - -# constants - -DEFAULT_DIM_HEAD = 64 - -Intermediates = namedtuple('Intermediates', [ - 'pre_softmax_attn', - 'post_softmax_attn' -]) - -LayerIntermediates = namedtuple('Intermediates', [ - 'hiddens', - 'attn_intermediates' -]) - - -class AbsolutePositionalEmbedding(nn.Module): - def __init__(self, dim, max_seq_len): - super().__init__() - self.emb = nn.Embedding(max_seq_len, dim) - self.init_() - - def init_(self): - nn.init.normal_(self.emb.weight, std=0.02) - - def forward(self, x): - n = torch.arange(x.shape[1], device=x.device) - return self.emb(n)[None, :, :] - - -class FixedPositionalEmbedding(nn.Module): - def __init__(self, dim): - super().__init__() - inv_freq = 1. / (10000 ** (torch.arange(0, dim, 2).float() / dim)) - self.register_buffer('inv_freq', inv_freq) - - def forward(self, x, seq_dim=1, offset=0): - t = torch.arange(x.shape[seq_dim], device=x.device).type_as(self.inv_freq) + offset - sinusoid_inp = torch.einsum('i , j -> i j', t, self.inv_freq) - emb = torch.cat((sinusoid_inp.sin(), sinusoid_inp.cos()), dim=-1) - return emb[None, :, :] - - -# helpers - -def exists(val): - return val is not None - - -def default(val, d): - if exists(val): - return val - return d() if isfunction(d) else d - - -def always(val): - def inner(*args, **kwargs): - return val - return inner - - -def not_equals(val): - def inner(x): - return x != val - return inner - - -def equals(val): - def inner(x): - return x == val - return inner - - -def max_neg_value(tensor): - return -torch.finfo(tensor.dtype).max - - -# keyword argument helpers - -def pick_and_pop(keys, d): - values = list(map(lambda key: d.pop(key), keys)) - return dict(zip(keys, values)) - - -def group_dict_by_key(cond, d): - return_val = [dict(), dict()] - for key in d.keys(): - match = bool(cond(key)) - ind = int(not match) - return_val[ind][key] = d[key] - return (*return_val,) - - -def string_begins_with(prefix, str): - return str.startswith(prefix) - - -def group_by_key_prefix(prefix, d): - return group_dict_by_key(partial(string_begins_with, prefix), d) - - -def groupby_prefix_and_trim(prefix, d): - kwargs_with_prefix, kwargs = group_dict_by_key(partial(string_begins_with, prefix), d) - kwargs_without_prefix = dict(map(lambda x: (x[0][len(prefix):], x[1]), tuple(kwargs_with_prefix.items()))) - return kwargs_without_prefix, kwargs - - -# classes -class Scale(nn.Module): - def __init__(self, value, fn): - super().__init__() - self.value = value - self.fn = fn - - def forward(self, x, **kwargs): - x, *rest = self.fn(x, **kwargs) - return (x * self.value, *rest) - - -class Rezero(nn.Module): - def __init__(self, fn): - super().__init__() - self.fn = fn - self.g = nn.Parameter(torch.zeros(1)) - - def forward(self, x, **kwargs): - x, *rest = self.fn(x, **kwargs) - return (x * self.g, *rest) - - -class ScaleNorm(nn.Module): - def __init__(self, dim, eps=1e-5): - super().__init__() - self.scale = dim ** -0.5 - self.eps = eps - self.g = nn.Parameter(torch.ones(1)) - - def forward(self, x): - norm = torch.norm(x, dim=-1, keepdim=True) * self.scale - return x / norm.clamp(min=self.eps) * self.g - - -class RMSNorm(nn.Module): - def __init__(self, dim, eps=1e-8): - super().__init__() - self.scale = dim ** -0.5 - self.eps = eps - self.g = nn.Parameter(torch.ones(dim)) - - def forward(self, x): - norm = torch.norm(x, dim=-1, keepdim=True) * self.scale - return x / norm.clamp(min=self.eps) * self.g - - -class Residual(nn.Module): - def forward(self, x, residual): - return x + residual - - -class GRUGating(nn.Module): - def __init__(self, dim): - super().__init__() - self.gru = nn.GRUCell(dim, dim) - - def forward(self, x, residual): - gated_output = self.gru( - rearrange(x, 'b n d -> (b n) d'), - rearrange(residual, 'b n d -> (b n) d') - ) - - return gated_output.reshape_as(x) - - -# feedforward - -class GEGLU(nn.Module): - def __init__(self, dim_in, dim_out): - super().__init__() - self.proj = nn.Linear(dim_in, dim_out * 2) - - def forward(self, x): - x, gate = self.proj(x).chunk(2, dim=-1) - return x * F.gelu(gate) - - -class FeedForward(nn.Module): - def __init__(self, dim, dim_out=None, mult=4, glu=False, dropout=0.): - super().__init__() - inner_dim = int(dim * mult) - dim_out = default(dim_out, dim) - project_in = nn.Sequential( - nn.Linear(dim, inner_dim), - nn.GELU() - ) if not glu else GEGLU(dim, inner_dim) - - self.net = nn.Sequential( - project_in, - nn.Dropout(dropout), - nn.Linear(inner_dim, dim_out) - ) - - def forward(self, x): - return self.net(x) - - -# attention. -class Attention(nn.Module): - def __init__( - self, - dim, - dim_head=DEFAULT_DIM_HEAD, - heads=8, - causal=False, - mask=None, - talking_heads=False, - sparse_topk=None, - use_entmax15=False, - num_mem_kv=0, - dropout=0., - on_attn=False - ): - super().__init__() - if use_entmax15: - raise NotImplementedError("Check out entmax activation instead of softmax activation!") - self.scale = dim_head ** -0.5 - self.heads = heads - self.causal = causal - self.mask = mask - - inner_dim = dim_head * heads - - self.to_q = nn.Linear(dim, inner_dim, bias=False) - self.to_k = nn.Linear(dim, inner_dim, bias=False) - self.to_v = nn.Linear(dim, inner_dim, bias=False) - self.dropout = nn.Dropout(dropout) - - # talking heads - self.talking_heads = talking_heads - if talking_heads: - self.pre_softmax_proj = nn.Parameter(torch.randn(heads, heads)) - self.post_softmax_proj = nn.Parameter(torch.randn(heads, heads)) - - # explicit topk sparse attention - self.sparse_topk = sparse_topk - - # entmax - #self.attn_fn = entmax15 if use_entmax15 else F.softmax - self.attn_fn = F.softmax - - # add memory key / values - self.num_mem_kv = num_mem_kv - if num_mem_kv > 0: - self.mem_k = nn.Parameter(torch.randn(heads, num_mem_kv, dim_head)) - self.mem_v = nn.Parameter(torch.randn(heads, num_mem_kv, dim_head)) - - # attention on attention - self.attn_on_attn = on_attn - self.to_out = nn.Sequential(nn.Linear(inner_dim, dim * 2), nn.GLU()) if on_attn else nn.Linear(inner_dim, dim) - - def forward( - self, - x, - context=None, - mask=None, - context_mask=None, - rel_pos=None, - sinusoidal_emb=None, - prev_attn=None, - mem=None - ): - b, n, _, h, talking_heads, device = *x.shape, self.heads, self.talking_heads, x.device - kv_input = default(context, x) - - q_input = x - k_input = kv_input - v_input = kv_input - - if exists(mem): - k_input = torch.cat((mem, k_input), dim=-2) - v_input = torch.cat((mem, v_input), dim=-2) - - if exists(sinusoidal_emb): - # in shortformer, the query would start at a position offset depending on the past cached memory - offset = k_input.shape[-2] - q_input.shape[-2] - q_input = q_input + sinusoidal_emb(q_input, offset=offset) - k_input = k_input + sinusoidal_emb(k_input) - - q = self.to_q(q_input) - k = self.to_k(k_input) - v = self.to_v(v_input) - - q, k, v = map(lambda t: rearrange(t, 'b n (h d) -> b h n d', h=h), (q, k, v)) - - input_mask = None - if any(map(exists, (mask, context_mask))): - q_mask = default(mask, lambda: torch.ones((b, n), device=device).bool()) - k_mask = q_mask if not exists(context) else context_mask - k_mask = default(k_mask, lambda: torch.ones((b, k.shape[-2]), device=device).bool()) - q_mask = rearrange(q_mask, 'b i -> b () i ()') - k_mask = rearrange(k_mask, 'b j -> b () () j') - input_mask = q_mask * k_mask - - if self.num_mem_kv > 0: - mem_k, mem_v = map(lambda t: repeat(t, 'h n d -> b h n d', b=b), (self.mem_k, self.mem_v)) - k = torch.cat((mem_k, k), dim=-2) - v = torch.cat((mem_v, v), dim=-2) - if exists(input_mask): - input_mask = F.pad(input_mask, (self.num_mem_kv, 0), value=True) - - dots = einsum('b h i d, b h j d -> b h i j', q, k) * self.scale - mask_value = max_neg_value(dots) - - if exists(prev_attn): - dots = dots + prev_attn - - pre_softmax_attn = dots - - if talking_heads: - dots = einsum('b h i j, h k -> b k i j', dots, self.pre_softmax_proj).contiguous() - - if exists(rel_pos): - dots = rel_pos(dots) - - if exists(input_mask): - dots.masked_fill_(~input_mask, mask_value) - del input_mask - - if self.causal: - i, j = dots.shape[-2:] - r = torch.arange(i, device=device) - mask = rearrange(r, 'i -> () () i ()') < rearrange(r, 'j -> () () () j') - mask = F.pad(mask, (j - i, 0), value=False) - dots.masked_fill_(mask, mask_value) - del mask - - if exists(self.sparse_topk) and self.sparse_topk < dots.shape[-1]: - top, _ = dots.topk(self.sparse_topk, dim=-1) - vk = top[..., -1].unsqueeze(-1).expand_as(dots) - mask = dots < vk - dots.masked_fill_(mask, mask_value) - del mask - - attn = self.attn_fn(dots, dim=-1) - post_softmax_attn = attn - - attn = self.dropout(attn) - - if talking_heads: - attn = einsum('b h i j, h k -> b k i j', attn, self.post_softmax_proj).contiguous() - - out = einsum('b h i j, b h j d -> b h i d', attn, v) - out = rearrange(out, 'b h n d -> b n (h d)') - - intermediates = Intermediates( - pre_softmax_attn=pre_softmax_attn, - post_softmax_attn=post_softmax_attn - ) - - return self.to_out(out), intermediates - - -class AttentionLayers(nn.Module): - def __init__( - self, - dim, - depth, - heads=8, - causal=False, - cross_attend=False, - only_cross=False, - use_scalenorm=False, - use_rmsnorm=False, - use_rezero=False, - rel_pos_num_buckets=32, - rel_pos_max_distance=128, - position_infused_attn=False, - custom_layers=None, - sandwich_coef=None, - par_ratio=None, - residual_attn=False, - cross_residual_attn=False, - macaron=False, - pre_norm=True, - gate_residual=False, - **kwargs - ): - super().__init__() - ff_kwargs, kwargs = groupby_prefix_and_trim('ff_', kwargs) - attn_kwargs, _ = groupby_prefix_and_trim('attn_', kwargs) - - dim_head = attn_kwargs.get('dim_head', DEFAULT_DIM_HEAD) - - self.dim = dim - self.depth = depth - self.layers = nn.ModuleList([]) - - self.has_pos_emb = position_infused_attn - self.pia_pos_emb = FixedPositionalEmbedding(dim) if position_infused_attn else None - self.rotary_pos_emb = always(None) - - assert rel_pos_num_buckets <= rel_pos_max_distance, 'number of relative position buckets must be less than the relative position max distance' - self.rel_pos = None - - self.pre_norm = pre_norm - - self.residual_attn = residual_attn - self.cross_residual_attn = cross_residual_attn - - norm_class = ScaleNorm if use_scalenorm else nn.LayerNorm - norm_class = RMSNorm if use_rmsnorm else norm_class - norm_fn = partial(norm_class, dim) - - norm_fn = nn.Identity if use_rezero else norm_fn - branch_fn = Rezero if use_rezero else None - - if cross_attend and not only_cross: - default_block = ('a', 'c', 'f') - elif cross_attend and only_cross: - default_block = ('c', 'f') - else: - default_block = ('a', 'f') - - if macaron: - default_block = ('f',) + default_block - - if exists(custom_layers): - layer_types = custom_layers - elif exists(par_ratio): - par_depth = depth * len(default_block) - assert 1 < par_ratio <= par_depth, 'par ratio out of range' - default_block = tuple(filter(not_equals('f'), default_block)) - par_attn = par_depth // par_ratio - depth_cut = par_depth * 2 // 3 # 2 / 3 attention layer cutoff suggested by PAR paper - par_width = (depth_cut + depth_cut // par_attn) // par_attn - assert len(default_block) <= par_width, 'default block is too large for par_ratio' - par_block = default_block + ('f',) * (par_width - len(default_block)) - par_head = par_block * par_attn - layer_types = par_head + ('f',) * (par_depth - len(par_head)) - elif exists(sandwich_coef): - assert sandwich_coef > 0 and sandwich_coef <= depth, 'sandwich coefficient should be less than the depth' - layer_types = ('a',) * sandwich_coef + default_block * (depth - sandwich_coef) + ('f',) * sandwich_coef - else: - layer_types = default_block * depth - - self.layer_types = layer_types - self.num_attn_layers = len(list(filter(equals('a'), layer_types))) - - for layer_type in self.layer_types: - if layer_type == 'a': - layer = Attention(dim, heads=heads, causal=causal, **attn_kwargs) - elif layer_type == 'c': - layer = Attention(dim, heads=heads, **attn_kwargs) - elif layer_type == 'f': - layer = FeedForward(dim, **ff_kwargs) - layer = layer if not macaron else Scale(0.5, layer) - else: - raise Exception(f'invalid layer type {layer_type}') - - if isinstance(layer, Attention) and exists(branch_fn): - layer = branch_fn(layer) - - if gate_residual: - residual_fn = GRUGating(dim) - else: - residual_fn = Residual() - - self.layers.append(nn.ModuleList([ - norm_fn(), - layer, - residual_fn - ])) - - def forward( - self, - x, - context=None, - mask=None, - context_mask=None, - mems=None, - return_hiddens=False - ): - hiddens = [] - intermediates = [] - prev_attn = None - prev_cross_attn = None - - mems = mems.copy() if exists(mems) else [None] * self.num_attn_layers - - for ind, (layer_type, (norm, block, residual_fn)) in enumerate(zip(self.layer_types, self.layers)): - is_last = ind == (len(self.layers) - 1) - - if layer_type == 'a': - hiddens.append(x) - layer_mem = mems.pop(0) - - residual = x - - if self.pre_norm: - x = norm(x) - - if layer_type == 'a': - out, inter = block(x, mask=mask, sinusoidal_emb=self.pia_pos_emb, rel_pos=self.rel_pos, - prev_attn=prev_attn, mem=layer_mem) - elif layer_type == 'c': - out, inter = block(x, context=context, mask=mask, context_mask=context_mask, prev_attn=prev_cross_attn) - elif layer_type == 'f': - out = block(x) - - x = residual_fn(out, residual) - - if layer_type in ('a', 'c'): - intermediates.append(inter) - - if layer_type == 'a' and self.residual_attn: - prev_attn = inter.pre_softmax_attn - elif layer_type == 'c' and self.cross_residual_attn: - prev_cross_attn = inter.pre_softmax_attn - - if not self.pre_norm and not is_last: - x = norm(x) - - if return_hiddens: - intermediates = LayerIntermediates( - hiddens=hiddens, - attn_intermediates=intermediates - ) - - return x, intermediates - - return x - - -class Encoder(AttentionLayers): - def __init__(self, **kwargs): - assert 'causal' not in kwargs, 'cannot set causality on encoder' - super().__init__(causal=False, **kwargs) - - - -class TransformerWrapper(nn.Module): - def __init__( - self, - *, - num_tokens, - max_seq_len, - attn_layers, - emb_dim=None, - max_mem_len=0., - emb_dropout=0., - num_memory_tokens=None, - tie_embedding=False, - use_pos_emb=True - ): - super().__init__() - assert isinstance(attn_layers, AttentionLayers), 'attention layers must be one of Encoder or Decoder' - - dim = attn_layers.dim - emb_dim = default(emb_dim, dim) - - self.max_seq_len = max_seq_len - self.max_mem_len = max_mem_len - self.num_tokens = num_tokens - - self.token_emb = nn.Embedding(num_tokens, emb_dim) - self.pos_emb = AbsolutePositionalEmbedding(emb_dim, max_seq_len) if ( - use_pos_emb and not attn_layers.has_pos_emb) else always(0) - self.emb_dropout = nn.Dropout(emb_dropout) - - self.project_emb = nn.Linear(emb_dim, dim) if emb_dim != dim else nn.Identity() - self.attn_layers = attn_layers - self.norm = nn.LayerNorm(dim) - - self.init_() - - self.to_logits = nn.Linear(dim, num_tokens) if not tie_embedding else lambda t: t @ self.token_emb.weight.t() - - # memory tokens (like [cls]) from Memory Transformers paper - num_memory_tokens = default(num_memory_tokens, 0) - self.num_memory_tokens = num_memory_tokens - if num_memory_tokens > 0: - self.memory_tokens = nn.Parameter(torch.randn(num_memory_tokens, dim)) - - # let funnel encoder know number of memory tokens, if specified - if hasattr(attn_layers, 'num_memory_tokens'): - attn_layers.num_memory_tokens = num_memory_tokens - - def init_(self): - nn.init.normal_(self.token_emb.weight, std=0.02) - - def forward( - self, - x, - return_embeddings=False, - mask=None, - return_mems=False, - return_attn=False, - mems=None, - **kwargs - ): - b, n, device, num_mem = *x.shape, x.device, self.num_memory_tokens - x = self.token_emb(x) - x += self.pos_emb(x) - x = self.emb_dropout(x) - - x = self.project_emb(x) - - if num_mem > 0: - mem = repeat(self.memory_tokens, 'n d -> b n d', b=b) - x = torch.cat((mem, x), dim=1) - - # auto-handle masking after appending memory tokens - if exists(mask): - mask = F.pad(mask, (num_mem, 0), value=True) - - x, intermediates = self.attn_layers(x, mask=mask, mems=mems, return_hiddens=True, **kwargs) - x = self.norm(x) - - mem, x = x[:, :num_mem], x[:, num_mem:] - - out = self.to_logits(x) if not return_embeddings else x - - if return_mems: - hiddens = intermediates.hiddens - new_mems = list(map(lambda pair: torch.cat(pair, dim=-2), zip(mems, hiddens))) if exists(mems) else hiddens - new_mems = list(map(lambda t: t[..., -self.max_mem_len:, :].detach(), new_mems)) - return out, new_mems - - if return_attn: - attn_maps = list(map(lambda t: t.post_softmax_attn, intermediates.attn_intermediates)) - return out, attn_maps - - return out - diff --git a/ldm/util.py b/ldm/util.py deleted file mode 100644 index e2b9a02351a22cd63f8280434705e711425aa7c4..0000000000000000000000000000000000000000 --- a/ldm/util.py +++ /dev/null @@ -1,197 +0,0 @@ -import importlib - -import torch -import numpy as np -from collections import abc -from einops import rearrange -from functools import partial - -import multiprocessing as mp -from threading import Thread -from queue import Queue - -from inspect import isfunction -from PIL import Image, ImageDraw, ImageFont - - -def log_txt_as_img(wh, xc, size=10): - # wh a tuple of (width, height) - # xc a list of captions to plot - b = len(xc) - txts = list() - for bi in range(b): - txt = Image.new("RGB", wh, color="white") - draw = ImageDraw.Draw(txt) - font = ImageFont.truetype('data/DejaVuSans.ttf', size=size) - nc = int(40 * (wh[0] / 256)) - lines = "\n".join(xc[bi][start:start + nc] for start in range(0, len(xc[bi]), nc)) - - try: - draw.text((0, 0), lines, fill="black", font=font) - except UnicodeEncodeError: - print("Cant encode string for logging. Skipping.") - - txt = np.array(txt).transpose(2, 0, 1) / 127.5 - 1.0 - txts.append(txt) - txts = np.stack(txts) - txts = torch.tensor(txts) - return txts - - -def ismap(x): - if not isinstance(x, torch.Tensor): - return False - return (len(x.shape) == 4) and (x.shape[1] > 3) - - -def isimage(x): - if not isinstance(x, torch.Tensor): - return False - return (len(x.shape) == 4) and (x.shape[1] == 3 or x.shape[1] == 1) - - -def exists(x): - return x is not None - - -def default(val, d): - if exists(val): - return val - return d() if isfunction(d) else d - - -def mean_flat(tensor): - """ - https://github.com/openai/guided-diffusion/blob/27c20a8fab9cb472df5d6bdd6c8d11c8f430b924/guided_diffusion/nn.py#L86 - Take the mean over all non-batch dimensions. - """ - return tensor.mean(dim=list(range(1, len(tensor.shape)))) - - -def count_params(model, verbose=False): - total_params = sum(p.numel() for p in model.parameters()) - if verbose: - print(f"{model.__class__.__name__} has {total_params * 1.e-6:.2f} M params.") - return total_params - - -def instantiate_from_config(config): - # config["target"] = "ldm.models.diffusion.control.ControlLDM" - # config["params"] = {"linear_start": 0.00085...} - return get_obj_from_str(config["target"])(**config.get("params", dict())) - -def get_obj_from_str(string): - # module = "ldm.models.diffusion.control" - # cls = "ControlLDM" - module, cls = string.rsplit(".", 1) - return getattr(importlib.import_module(module, package=None), cls) - - -def _do_parallel_data_prefetch(func, Q, data, idx, idx_to_fn=False): - # create dummy dataset instance - - # run prefetching - if idx_to_fn: - res = func(data, worker_id=idx) - else: - res = func(data) - Q.put([idx, res]) - Q.put("Done") - - -def parallel_data_prefetch( - func: callable, data, n_proc, target_data_type="ndarray", cpu_intensive=True, use_worker_id=False -): - # if target_data_type not in ["ndarray", "list"]: - # raise ValueError( - # "Data, which is passed to parallel_data_prefetch has to be either of type list or ndarray." - # ) - if isinstance(data, np.ndarray) and target_data_type == "list": - raise ValueError("list expected but function got ndarray.") - elif isinstance(data, abc.Iterable): - if isinstance(data, dict): - print( - f'WARNING:"data" argument passed to parallel_data_prefetch is a dict: Using only its values and disregarding keys.' - ) - data = list(data.values()) - if target_data_type == "ndarray": - data = np.asarray(data) - else: - data = list(data) - else: - raise TypeError( - f"The data, that shall be processed parallel has to be either an np.ndarray or an Iterable, but is actually {type(data)}." - ) - - if cpu_intensive: - Q = mp.Queue(1000) - proc = mp.Process - else: - Q = Queue(1000) - proc = Thread - # spawn processes - if target_data_type == "ndarray": - arguments = [ - [func, Q, part, i, use_worker_id] - for i, part in enumerate(np.array_split(data, n_proc)) - ] - else: - step = ( - int(len(data) / n_proc + 1) - if len(data) % n_proc != 0 - else int(len(data) / n_proc) - ) - arguments = [ - [func, Q, part, i, use_worker_id] - for i, part in enumerate( - [data[i: i + step] for i in range(0, len(data), step)] - ) - ] - processes = [] - for i in range(n_proc): - p = proc(target=_do_parallel_data_prefetch, args=arguments[i]) - processes += [p] - - # start processes - print(f"Start prefetching...") - import time - - start = time.time() - gather_res = [[] for _ in range(n_proc)] - try: - for p in processes: - p.start() - - k = 0 - while k < n_proc: - # get result - res = Q.get() - if res == "Done": - k += 1 - else: - gather_res[res[0]] = res[1] - - except Exception as e: - print("Exception: ", e) - for p in processes: - p.terminate() - - raise e - finally: - for p in processes: - p.join() - print(f"Prefetching complete. [{time.time() - start} sec.]") - - if target_data_type == 'ndarray': - if not isinstance(gather_res[0], np.ndarray): - return np.concatenate([np.asarray(r) for r in gather_res], axis=0) - - # order outputs - return np.concatenate(gather_res, axis=0) - elif target_data_type == 'list': - out = [] - for r in gather_res: - out.extend(r) - return out - else: - return gather_res