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import os
import gc
import time
import torch
from PIL import Image as img
from PIL.Image import Image
from diffusers import (
FluxTransformer2DModel,
DiffusionPipeline,
AutoencoderTiny
)
from transformers import T5EncoderModel
from huggingface_hub.constants import HF_HUB_CACHE
from torchao.quantization import quantize_, int8_weight_only
from first_block_cache.diffusers_adapters import apply_cache_on_pipe
from pipelines.models import TextToImageRequest
from torch import Generator
os.environ['PYTORCH_CUDA_ALLOC_CONF']="expandable_segments:True"
Pipeline = None
ckpt_id = "black-forest-labs/FLUX.1-schnell"
ckpt_revision = "741f7c3ce8b383c54771c7003378a50191e9efe9"
def empty_cache():
gc.collect()
torch.cuda.empty_cache()
torch.cuda.reset_max_memory_allocated()
torch.cuda.reset_peak_memory_stats()
def load_pipeline() -> Pipeline:
empty_cache()
dtype, device = torch.bfloat16, "cuda"
text_encoder_2 = T5EncoderModel.from_pretrained(
"city96/t5-v1_1-xxl-encoder-bf16",
revision="1b9c856aadb864af93c1dcdc226c2774fa67bc86",
torch_dtype=torch.bfloat16
).to(memory_format=torch.channels_last)
path = os.path.join(HF_HUB_CACHE, "models--RobertML--FLUX.1-schnell-int8wo/snapshots/307e0777d92df966a3c0f99f31a6ee8957a9857a")
model = FluxTransformer2DModel.from_pretrained(
path,
torch_dtype=dtype,
use_safetensors=False
).to(memory_format=torch.channels_last)
pipeline = DiffusionPipeline.from_pretrained(
ckpt_id,
revision=ckpt_revision,
transformer=model,
text_encoder_2=text_encoder_2,
torch_dtype=dtype,
).to(device)
apply_cache_on_pipe(pipeline, residual_diff_threshold=0.95)
for _ in range(3):
pipeline(
prompt="",
width=1024,
height=1024,
guidance_scale=0.0,
num_inference_steps=4,
max_sequence_length=256
)
return pipeline
@torch.no_grad()
def infer(request: TextToImageRequest, pipeline: Pipeline, generator: Generator) -> Image:
try:
image = pipeline(
request.prompt,
generator=generator,
guidance_scale=0.0,
num_inference_steps=4,
max_sequence_length=256,
height=request.height,
width=request.width,
output_type="pil"
).images[0]
except:
image = img.open("./RobertML.png")
return image
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