Delete app.py

app.py

@@ -1,768 +0,0 @@
-import os
-# Comment out spaces import to avoid the error
-# import spaces
-
-import time
-import gradio as gr
-import torch
-from PIL import Image
-from torchvision import transforms
-from dataclasses import dataclass, field
-import math
-from typing import Callable
-
-from tqdm import tqdm
-import bitsandbytes as bnb
-from bitsandbytes.nn.modules import Params4bit, QuantState
-
-import torch
-import random
-from einops import rearrange, repeat
-from diffusers import AutoencoderKL
-from torch import Tensor, nn
-from transformers import CLIPTextModel, CLIPTokenizer
-from transformers import T5EncoderModel, T5Tokenizer
-
-# ---------------- Encoders ----------------
-
-class HFEmbedder(nn.Module):
-    def __init__(self, version: str, max_length: int, **hf_kwargs):
-        super().__init__()
-        self.is_clip = version.startswith("openai")
-        self.max_length = max_length
-        self.output_key = "pooler_output" if self.is_clip else "last_hidden_state"
-
-        if self.is_clip:
-            self.tokenizer: CLIPTokenizer = CLIPTokenizer.from_pretrained(version, max_length=max_length)
-            self.hf_module: CLIPTextModel = CLIPTextModel.from_pretrained(version, **hf_kwargs)
-        else:
-            self.tokenizer: T5Tokenizer = T5Tokenizer.from_pretrained(version, max_length=max_length)
-            self.hf_module: T5EncoderModel = T5EncoderModel.from_pretrained(version, **hf_kwargs)
-
-        self.hf_module = self.hf_module.eval().requires_grad_(False)
-
-    def forward(self, text: list[str]) -> Tensor:
-        batch_encoding = self.tokenizer(
-            text,
-            truncation=True,
-            max_length=self.max_length,
-            return_length=False,
-            return_overflowing_tokens=False,
-            padding="max_length",
-            return_tensors="pt",
-        )
-
-        outputs = self.hf_module(
-            input_ids=batch_encoding["input_ids"].to(self.hf_module.device),
-            attention_mask=None,
-            output_hidden_states=False,
-        )
-        return outputs[self.output_key]
-
-device = "cuda" if torch.cuda.is_available() else "cpu"
-# Force using safetensors to avoid the torch.load security issue
-t5 = HFEmbedder("DeepFloyd/t5-v1_1-xxl", max_length=512, torch_dtype=torch.bfloat16, use_safetensors=True).to(device)
-clip = HFEmbedder("openai/clip-vit-large-patch14", max_length=77, torch_dtype=torch.bfloat16, use_safetensors=True).to(device)
-ae = AutoencoderKL.from_pretrained("black-forest-labs/FLUX.1-dev", subfolder="vae", torch_dtype=torch.bfloat16, use_safetensors=True).to(device)
-
-# ---------------- NF4 ----------------
-
-def functional_linear_4bits(x, weight, bias):
-    import bitsandbytes as bnb
-    out = bnb.matmul_4bit(x, weight.t(), bias=bias, quant_state=weight.quant_state)
-    out = out.to(x)
-    return out
-
-class ForgeParams4bit(Params4bit):
-    """Subclass to force re-quantization to GPU if needed."""
-    def to(self, *args, **kwargs):
-        import torch
-        device, dtype, non_blocking, convert_to_format = torch._C._nn._parse_to(*args, **kwargs)
-        if device is not None and device.type == "cuda" and not self.bnb_quantized:
-            return self._quantize(device)
-        else:
-            n = ForgeParams4bit(
-                torch.nn.Parameter.to(self, device=device, dtype=dtype, non_blocking=non_blocking),
-                requires_grad=self.requires_grad,
-                quant_state=self.quant_state,
-                compress_statistics=False,
-                blocksize=64,
-                quant_type=self.quant_type,
-                quant_storage=self.quant_storage,
-                bnb_quantized=self.bnb_quantized,
-                module=self.module
-            )
-            self.module.quant_state = n.quant_state
-            self.data = n.data
-            self.quant_state = n.quant_state
-            return n
-
-class ForgeLoader4Bit(nn.Module):
-    def __init__(self, *, device, dtype, quant_type, **kwargs):
-        super().__init__()
-        self.dummy = nn.Parameter(torch.empty(1, device=device, dtype=dtype))
-        self.weight = None
-        self.quant_state = None
-        self.bias = None
-        self.quant_type = quant_type
-
-    def _save_to_state_dict(self, destination, prefix, keep_vars):
-        super()._save_to_state_dict(destination, prefix, keep_vars)
-        from bitsandbytes.nn.modules import QuantState
-        quant_state = getattr(self.weight, "quant_state", None)
-        if quant_state is not None:
-            for k, v in quant_state.as_dict(packed=True).items():
-                destination[prefix + "weight." + k] = v if keep_vars else v.detach()
-        return
-
-    def _load_from_state_dict(
-        self, state_dict, prefix, local_metadata, strict, missing_keys, unexpected_keys, error_msgs
-    ):
-        from bitsandbytes.nn.modules import Params4bit
-        import torch
-
-        quant_state_keys = {k[len(prefix + "weight."):] for k in state_dict.keys() if k.startswith(prefix + "weight.")}
-        if any('bitsandbytes' in k for k in quant_state_keys):
-            quant_state_dict = {k: state_dict[prefix + "weight." + k] for k in quant_state_keys}
-            self.weight = ForgeParams4bit.from_prequantized(
-                data=state_dict[prefix + 'weight'],
-                quantized_stats=quant_state_dict,
-                requires_grad=False,
-                device=torch.device('cuda'),
-                module=self
-            )
-            self.quant_state = self.weight.quant_state
-
-            if prefix + 'bias' in state_dict:
-                self.bias = torch.nn.Parameter(state_dict[prefix + 'bias'].to(self.dummy))
-            del self.dummy
-        elif hasattr(self, 'dummy'):
-            if prefix + 'weight' in state_dict:
-                self.weight = ForgeParams4bit(
-                    state_dict[prefix + 'weight'].to(self.dummy),
-                    requires_grad=False,
-                    compress_statistics=True,
-                    quant_type=self.quant_type,
-                    quant_storage=torch.uint8,
-                    module=self,
-                )
-                self.quant_state = self.weight.quant_state
-
-            if prefix + 'bias' in state_dict:
-                self.bias = torch.nn.Parameter(state_dict[prefix + 'bias'].to(self.dummy))
-
-            del self.dummy
-        else:
-            super()._load_from_state_dict(state_dict, prefix, local_metadata, strict, missing_keys, unexpected_keys, error_msgs)
-
-class Linear(ForgeLoader4Bit):
-    def __init__(self, *args, device=None, dtype=None, **kwargs):
-        super().__init__(device=device, dtype=dtype, quant_type='nf4')
-
-    def forward(self, x):
-        self.weight.quant_state = self.quant_state
-        if self.bias is not None and self.bias.dtype != x.dtype:
-            self.bias.data = self.bias.data.to(x.dtype)
-        return functional_linear_4bits(x, self.weight, self.bias)
-
-import torch.nn as nn
-nn.Linear = Linear
-
-# ---------------- Model ----------------
-
-def attention(q: Tensor, k: Tensor, v: Tensor, pe: Tensor) -> Tensor:
-    q, k = apply_rope(q, k, pe)
-    x = torch.nn.functional.scaled_dot_product_attention(q, k, v)
-    x = x.permute(0, 2, 1, 3).reshape(x.size(0), x.size(2), -1)
-    return x
-
-def rope(pos, dim, theta):
-    import torch
-    scale = torch.arange(0, dim, 2, dtype=torch.float64, device=pos.device) / dim
-    omega = 1.0 / (theta ** scale)
-    out = pos.unsqueeze(-1) * omega.unsqueeze(0)
-    cos_out = torch.cos(out)
-    sin_out = torch.sin(out)
-    out = torch.stack([cos_out, -sin_out, sin_out, cos_out], dim=-1)
-    b, n, d, _ = out.shape
-    out = out.view(b, n, d, 2, 2)
-    return out.float()
-
-def apply_rope(xq: Tensor, xk: Tensor, freqs_cis: Tensor) -> tuple[Tensor, Tensor]:
-    xq_ = xq.float().reshape(*xq.shape[:-1], -1, 1, 2)
-    xk_ = xk.float().reshape(*xk.shape[:-1], -1, 1, 2)
-    xq_out = freqs_cis[..., 0] * xq_[..., 0] + freqs_cis[..., 1] * xq_[..., 1]
-    xk_out = freqs_cis[..., 0] * xk_[..., 0] + freqs_cis[..., 1] * xk_[..., 1]
-    return xq_out.reshape(*xq.shape).type_as(xq), xk_out.reshape(*xk.shape).type_as(xk)
-
-class EmbedND(nn.Module):
-    def __init__(self, dim: int, theta: int, axes_dim: list[int]):
-        super().__init__()
-        self.dim = dim
-        self.theta = theta
-        self.axes_dim = axes_dim
-
-    def forward(self, ids: Tensor) -> Tensor:
-        import torch
-        n_axes = ids.shape[-1]
-        emb = torch.cat(
-            [rope(ids[..., i], self.axes_dim[i], self.theta) for i in range(n_axes)],
-            dim=-3,
-        )
-        return emb.unsqueeze(1)
-
-def timestep_embedding(t: Tensor, dim, max_period=10000, time_factor: float = 1000.0):
-    import torch, math
-    t = time_factor * t
-    half = dim // 2
-    freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(t.device)
-    args = t[:, None].float() * freqs[None]
-    embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
-    if dim % 2:
-        embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
-    if torch.is_floating_point(t):
-        embedding = embedding.to(t)
-    return embedding
-
-class MLPEmbedder(nn.Module):
-    def __init__(self, in_dim: int, hidden_dim: int):
-        super().__init__()
-        self.in_layer = nn.Linear(in_dim, hidden_dim, bias=True)
-        self.silu = nn.SiLU()
-        self.out_layer = nn.Linear(hidden_dim, hidden_dim, bias=True)
-
-    def forward(self, x: Tensor) -> Tensor:
-        return self.out_layer(self.silu(self.in_layer(x)))
-
-class RMSNorm(torch.nn.Module):
-    def __init__(self, dim: int):
-        super().__init__()
-        self.scale = nn.Parameter(torch.ones(dim))
-
-    def forward(self, x: Tensor):
-        import torch
-        x_dtype = x.dtype
-        x = x.float()
-        rrms = torch.rsqrt(torch.mean(x**2, dim=-1, keepdim=True) + 1e-6)
-        return (x * rrms).to(dtype=x_dtype) * self.scale
-
-class QKNorm(torch.nn.Module):
-    def __init__(self, dim: int):
-        super().__init__()
-        self.query_norm = RMSNorm(dim)
-        self.key_norm = RMSNorm(dim)
-
-    def forward(self, q: Tensor, k: Tensor, v: Tensor) -> tuple[Tensor, Tensor]:
-        q = self.query_norm(q)
-        k = self.key_norm(k)
-        return q.to(v), k.to(v)
-
-class SelfAttention(nn.Module):
-    def __init__(self, dim: int, num_heads: int = 8, qkv_bias: bool = False):
-        super().__init__()
-        self.num_heads = num_heads
-        self.qkv = nn.Linear(dim, dim * 3, bias=qkv_bias)
-        head_dim = dim // num_heads
-        self.norm = QKNorm(head_dim)
-        self.proj = nn.Linear(dim, dim)
-
-    def forward(self, x: Tensor, pe: Tensor) -> Tensor:
-        qkv = self.qkv(x)
-        B, L, _ = qkv.shape
-        qkv = qkv.view(B, L, 3, self.num_heads, -1)
-        q, k, v = qkv.permute(2, 0, 3, 1, 4)
-        q, k = self.norm(q, k, v)
-        x = attention(q, k, v, pe=pe)
-        x = self.proj(x)
-        return x
-
-from dataclasses import dataclass
-
-@dataclass
-class ModulationOut:
-    shift: Tensor
-    scale: Tensor
-    gate: Tensor
-
-class Modulation(nn.Module):
-    def __init__(self, dim: int, double: bool):
-        super().__init__()
-        self.is_double = double
-        self.multiplier = 6 if double else 3
-        self.lin = nn.Linear(dim, self.multiplier * dim, bias=True)
-
-    def forward(self, vec: Tensor):
-        out = self.lin(nn.functional.silu(vec))[:, None, :].chunk(self.multiplier, dim=-1)
-        first = ModulationOut(*out[:3])
-        second = ModulationOut(*out[3:]) if self.is_double else None
-        return first, second
-
-class DoubleStreamBlock(nn.Module):
-    def __init__(self, hidden_size: int, num_heads: int, mlp_ratio: float, qkv_bias: bool = False):
-        super().__init__()
-        mlp_hidden_dim = int(hidden_size * mlp_ratio)
-        self.num_heads = num_heads
-        self.hidden_size = hidden_size
-        self.img_mod = Modulation(hidden_size, double=True)
-        self.img_norm1 = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.img_attn = SelfAttention(dim=hidden_size, num_heads=num_heads, qkv_bias=qkv_bias)
-        self.img_norm2 = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.img_mlp = nn.Sequential(
-            nn.Linear(hidden_size, mlp_hidden_dim, bias=True),
-            nn.GELU(approximate="tanh"),
-            nn.Linear(mlp_hidden_dim, hidden_size, bias=True),
-        )
-        self.txt_mod = Modulation(hidden_size, double=True)
-        self.txt_norm1 = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.txt_attn = SelfAttention(dim=hidden_size, num_heads=num_heads, qkv_bias=qkv_bias)
-        self.txt_norm2 = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.txt_mlp = nn.Sequential(
-            nn.Linear(hidden_size, mlp_hidden_dim, bias=True),
-            nn.GELU(approximate="tanh"),
-            nn.Linear(mlp_hidden_dim, hidden_size, bias=True),
-        )
-
-    def forward(self, img: Tensor, txt: Tensor, vec: Tensor, pe: Tensor) -> tuple[Tensor, Tensor]:
-        img_mod1, img_mod2 = self.img_mod(vec)
-        txt_mod1, txt_mod2 = self.txt_mod(vec)
-
-        # Image attention
-        img_modulated = self.img_norm1(img)
-        img_modulated = (1 + img_mod1.scale) * img_modulated + img_mod1.shift
-        img_qkv = self.img_attn.qkv(img_modulated)
-        B, L, _ = img_qkv.shape
-        H = self.num_heads
-        D = img_qkv.shape[-1] // (3 * H)
-        img_q, img_k, img_v = img_qkv.view(B, L, 3, H, D).permute(2, 0, 3, 1, 4)
-        img_q, img_k = self.img_attn.norm(img_q, img_k, img_v)
-
-        # Text attention
-        txt_modulated = self.txt_norm1(txt)
-        txt_modulated = (1 + txt_mod1.scale) * txt_modulated + txt_mod1.shift
-        txt_qkv = self.txt_attn.qkv(txt_modulated)
-        B, L, _ = txt_qkv.shape
-        txt_q, txt_k, txt_v = txt_qkv.view(B, L, 3, H, D).permute(2, 0, 3, 1, 4)
-        txt_q, txt_k = self.txt_attn.norm(txt_q, txt_k, txt_v)
-
-        # Combined attention
-        q = torch.cat((txt_q, img_q), dim=2)
-        k = torch.cat((txt_k, img_k), dim=2)
-        v = torch.cat((txt_v, img_v), dim=2)
-        attn = attention(q, k, v, pe=pe)
-        txt_attn, img_attn = attn[:, : txt.shape[1]], attn[:, txt.shape[1] :]
-
-        # Img final
-        img = img + img_mod1.gate * self.img_attn.proj(img_attn)
-        img = img + img_mod2.gate * self.img_mlp((1 + img_mod2.scale) * self.img_norm2(img) + img_mod2.shift)
-
-        # Text final
-        txt = txt + txt_mod1.gate * self.txt_attn.proj(txt_attn)
-        txt = txt + txt_mod2.gate * self.txt_mlp((1 + txt_mod2.scale) * self.txt_norm2(txt) + txt_mod2.shift)
-        return img, txt
-
-class SingleStreamBlock(nn.Module):
-    def __init__(
-        self,
-        hidden_size: int,
-        num_heads: int,
-        mlp_ratio: float = 4.0,
-        qk_scale: float | None = None,
-    ):
-        super().__init__()
-        self.hidden_dim = hidden_size
-        self.num_heads = num_heads
-        head_dim = hidden_size // num_heads
-        self.scale = qk_scale or head_dim**-0.5
-        self.mlp_hidden_dim = int(hidden_size * mlp_ratio)
-        self.linear1 = nn.Linear(hidden_size, hidden_size * 3 + self.mlp_hidden_dim)
-        self.linear2 = nn.Linear(hidden_size + self.mlp_hidden_dim, hidden_size)
-        self.norm = QKNorm(head_dim)
-        self.hidden_size = hidden_size
-        self.pre_norm = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.mlp_act = nn.GELU(approximate="tanh")
-        self.modulation = Modulation(hidden_size, double=False)
-
-    def forward(self, x: Tensor, vec: Tensor, pe: Tensor) -> Tensor:
-        mod, _ = self.modulation(vec)
-        x_mod = (1 + mod.scale) * self.pre_norm(x) + mod.shift
-        qkv, mlp = torch.split(self.linear1(x_mod), [3 * self.hidden_size, self.mlp_hidden_dim], dim=-1)
-        qkv = qkv.view(qkv.size(0), qkv.size(1), 3, self.num_heads, self.hidden_size // self.num_heads)
-        q, k, v = qkv.permute(2, 0, 3, 1, 4)
-        q, k = self.norm(q, k, v)
-        attn = attention(q, k, v, pe=pe)
-        output = self.linear2(torch.cat((attn, self.mlp_act(mlp)), 2))
-        return x + mod.gate * output
-
-class LastLayer(nn.Module):
-    def __init__(self, hidden_size: int, patch_size: int, out_channels: int):
-        super().__init__()
-        self.norm_final = nn.LayerNorm(hidden_size, elementwise_affine=False, eps=1e-6)
-        self.linear = nn.Linear(hidden_size, patch_size * patch_size * out_channels, bias=True)
-        self.adaLN_modulation = nn.Sequential(nn.SiLU(), nn.Linear(hidden_size, 2 * hidden_size, bias=True))
-
-    def forward(self, x: Tensor, vec: Tensor) -> Tensor:
-        shift, scale = self.adaLN_modulation(vec).chunk(2, dim=1)
-        x = (1 + scale[:, None, :]) * self.norm_final(x) + shift[:, None, :]
-        x = self.linear(x)
-        return x
-
-from dataclasses import dataclass, field
-
-@dataclass
-class FluxParams:
-    in_channels: int = 64
-    vec_in_dim: int = 768
-    context_in_dim: int = 4096
-    hidden_size: int = 3072
-    mlp_ratio: float = 4.0
-    num_heads: int = 24
-    depth: int = 19
-    depth_single_blocks: int = 38
-    axes_dim: list[int] = field(default_factory=lambda: [16, 56, 56])
-    theta: int = 10000
-    qkv_bias: bool = True
-    guidance_embed: bool = True
-
-class Flux(nn.Module):
-    def __init__(self, params = FluxParams()):
-        super().__init__()
-        self.params = params
-        self.in_channels = params.in_channels
-        self.out_channels = self.in_channels
-        if params.hidden_size % params.num_heads != 0:
-            raise ValueError(
-                f"Hidden size {params.hidden_size} must be divisible by num_heads {params.num_heads}"
-            )
-        pe_dim = params.hidden_size // params.num_heads
-        if sum(params.axes_dim) != pe_dim:
-            raise ValueError(f"Got {params.axes_dim} but expected positional dim {pe_dim}")
-        self.hidden_size = params.hidden_size
-        self.num_heads = params.num_heads
-        self.pe_embedder = EmbedND(dim=pe_dim, theta=params.theta, axes_dim=params.axes_dim)
-        self.img_in = nn.Linear(self.in_channels, self.hidden_size, bias=True)
-        self.time_in = MLPEmbedder(in_dim=256, hidden_dim=self.hidden_size)
-        self.vector_in = MLPEmbedder(params.vec_in_dim, self.hidden_size)
-        self.guidance_in = (
-            MLPEmbedder(in_dim=256, hidden_dim=self.hidden_size) if params.guidance_embed else nn.Identity()
-        )
-        self.txt_in = nn.Linear(params.context_in_dim, self.hidden_size)
-
-        self.double_blocks = nn.ModuleList(
-            [
-                DoubleStreamBlock(
-                    self.hidden_size,
-                    self.num_heads,
-                    mlp_ratio=params.mlp_ratio,
-                    qkv_bias=params.qkv_bias,
-                )
-                for _ in range(params.depth)
-            ]
-        )
-
-        self.single_blocks = nn.ModuleList(
-            [
-                SingleStreamBlock(self.hidden_size, self.num_heads, mlp_ratio=params.mlp_ratio)
-                for _ in range(params.depth_single_blocks)
-            ]
-        )
-
-        self.final_layer = LastLayer(self.hidden_size, 1, self.out_channels)
-
-    def forward(
-        self,
-        img: Tensor,
-        img_ids: Tensor,
-        txt: Tensor,
-        txt_ids: Tensor,
-        timesteps: Tensor,
-        y: Tensor,
-        guidance: Tensor | None = None,
-    ) -> Tensor:
-        if img.ndim != 3 or txt.ndim != 3:
-            raise ValueError("Input img and txt tensors must have 3 dimensions.")
-        img = self.img_in(img)
-        vec = self.time_in(timestep_embedding(timesteps, 256))
-        if self.params.guidance_embed:
-            if guidance is None:
-                raise ValueError("No guidance strength provided for guidance-distilled model.")
-            vec = vec + self.guidance_in(timestep_embedding(guidance, 256))
-        vec = vec + self.vector_in(y)
-        txt = self.txt_in(txt)
-        ids = torch.cat((txt_ids, img_ids), dim=1)
-        pe = self.pe_embedder(ids)
-        for block in self.double_blocks:
-            img, txt = block(img=img, txt=txt, vec=vec, pe=pe)
-        img = torch.cat((txt, img), 1)
-        for block in self.single_blocks:
-            img = block(img, vec=vec, pe=pe)
-        img = img[:, txt.shape[1] :, ...]
-        img = self.final_layer(img, vec)
-        return img
-
-def prepare(t5: HFEmbedder, clip: HFEmbedder, img: Tensor, prompt: str | list[str]) -> dict[str, Tensor]:
-    import torch
-    bs, c, h, w = img.shape
-    if bs == 1 and not isinstance(prompt, str):
-        bs = len(prompt)
-    img = rearrange(img, "b c (h ph) (w pw) -> b (h w) (c ph pw)", ph=2, pw=2)
-    if img.shape[0] == 1 and bs > 1:
-        img = repeat(img, "1 ... -> bs ...", bs=bs)
-    img_ids = torch.zeros(h // 2, w // 2, 3)
-    img_ids[..., 1] = img_ids[..., 1] + torch.arange(h // 2)[:, None]
-    img_ids[..., 2] = img_ids[..., 2] + torch.arange(w // 2)[None, :]
-    img_ids = repeat(img_ids, "h w c -> b (h w) c", b=bs)
-    if isinstance(prompt, str):
-        prompt = [prompt]
-    txt = t5(prompt)
-    if txt.shape[0] == 1 and bs > 1:
-        txt = repeat(txt, "1 ... -> bs ...", bs=bs)
-    txt_ids = torch.zeros(bs, txt.shape[1], 3)
-    vec = clip(prompt)
-    if vec.shape[0] == 1 and bs > 1:
-        vec = repeat(vec, "1 ... -> bs ...", bs=bs)
-    return {
-        "img": img,
-        "img_ids": img_ids.to(img.device),
-        "txt": txt.to(img.device),
-        "txt_ids": txt_ids.to(img.device),
-        "vec": vec.to(img.device),
-    }
-
-def time_shift(mu: float, sigma: float, t: Tensor):
-    import math
-    return math.exp(mu) / (math.exp(mu) + (1 / t - 1) ** sigma)
-
-def get_lin_function(
-    x1: float = 256, y1: float = 0.5, x2: float = 4096, y2: float = 1.15
-) -> Callable[[float], float]:
-    import math
-    m = (y2 - y1) / (x2 - x1)
-    b = y1 - m * x1
-    return lambda x: m * x + b
-
-def get_schedule(
-    num_steps: int,
-    image_seq_len: int,
-    base_shift: float = 0.5,
-    max_shift: float = 1.15,
-    shift: bool = True,
-) -> list[float]:
-    import torch
-    import math
-    timesteps = torch.linspace(1, 0, num_steps + 1)
-    if shift:
-        mu = get_lin_function(y1=base_shift, y2=max_shift)(image_seq_len)
-        timesteps = time_shift(mu, 1.0, timesteps)
-    return timesteps.tolist()
-
-def denoise(
-    model: Flux,
-    img: Tensor,
-    img_ids: Tensor,
-    txt: Tensor,
-    txt_ids: Tensor,
-    vec: Tensor,
-    timesteps: list[float],
-    guidance: float = 4.0,
-):
-    import torch
-    guidance_vec = torch.full((img.shape[0],), guidance, device=img.device, dtype=img.dtype)
-    for t_curr, t_prev in tqdm(zip(timesteps[:-1], timesteps[1:]), total=len(timesteps) - 1):
-        t_vec = torch.full((img.shape[0],), t_curr, dtype=img.dtype, device=img.device)
-        pred = model(
-            img=img,
-            img_ids=img_ids,
-            txt=txt,
-            txt_ids=txt_ids,
-            y=vec,
-            timesteps=t_vec,
-            guidance=guidance_vec,
-        )
-        img = img + (t_prev - t_curr) * pred
-    return img
-
-def unpack(x: Tensor, height: int, width: int) -> Tensor:
-    return rearrange(
-        x,
-        "b (h w) (c ph pw) -> b c (h ph) (w pw)",
-        h=math.ceil(height / 16),
-        w=math.ceil(width / 16),
-        ph=2,
-        pw=2,
-    )
-
-@dataclass
-class SamplingOptions:
-    prompt: str
-    width: int
-    height: int
-    guidance: float
-    seed: int | None
-
-def get_image(image) -> torch.Tensor | None:
-    if image is None:
-        return None
-    image = Image.fromarray(image).convert("RGB")
-    transform = transforms.Compose([
-        transforms.ToTensor(),
-        transforms.Lambda(lambda x: 2.0 * x - 1.0),
-    ])
-    img: torch.Tensor = transform(image)
-    return img[None, ...]
-
-# Load the NF4 quantized checkpoint
-from huggingface_hub import hf_hub_download
-from safetensors.torch import load_file
-
-sd = load_file(hf_hub_download(repo_id="lllyasviel/flux1-dev-bnb-nf4", filename="flux1-dev-bnb-nf4-v2.safetensors"))
-sd = {k.replace("model.diffusion_model.", ""): v for k, v in sd.items() if "model.diffusion_model" in k}
-model = Flux().to(dtype=torch.bfloat16, device=device)
-result = model.load_state_dict(sd)
-model_zero_init = False
-
-# Remove @spaces.GPU decorator - we'll handle GPU allocation manually
-# @spaces.GPU
-@torch.no_grad()
-def generate_image(
-    prompt, width, height, guidance, inference_steps, seed,
-    do_img2img, init_image, image2image_strength, resize_img,
-    progress=gr.Progress(track_tqdm=True),
-):
-    if seed == 0:
-        seed = int(random.random() * 1_000_000)
-
-    device = "cuda" if torch.cuda.is_available() else "cpu"
-    torch_device = torch.device(device)
-
-    global model, model_zero_init
-    if not model_zero_init:
-        model = model.to(torch_device)
-        model_zero_init = True
-
-    if do_img2img and init_image is not None:
-        init_image = get_image(init_image)
-        if resize_img:
-            init_image = torch.nn.functional.interpolate(init_image, (height, width))
-        else:
-            h, w = init_image.shape[-2:]
-            init_image = init_image[..., : 16 * (h // 16), : 16 * (w // 16)]
-            height = init_image.shape[-2]
-            width = init_image.shape[-1]
-        init_image = ae.encode(init_image.to(torch_device).to(torch.bfloat16)).latent_dist.sample()
-        init_image = (init_image - ae.config.shift_factor) * ae.config.scaling_factor
-
-    generator = torch.Generator(device=device).manual_seed(seed)
-    x = torch.randn(
-        1,
-        16,
-        2 * math.ceil(height / 16),
-        2 * math.ceil(width / 16),
-        device=device,
-        dtype=torch.bfloat16,
-        generator=generator
-    )
-
-    timesteps = get_schedule(inference_steps, (x.shape[-1] * x.shape[-2]) // 4, shift=True)
-
-    if do_img2img and init_image is not None:
-        t_idx = int((1 - image2image_strength) * inference_steps)
-        t = timesteps[t_idx]
-        timesteps = timesteps[t_idx:]
-        x = t * x + (1.0 - t) * init_image.to(x.dtype)
-
-    inp = prepare(t5=t5, clip=clip, img=x, prompt=prompt)
-    x = denoise(model, **inp, timesteps=timesteps, guidance=guidance)
-    x = unpack(x.float(), height, width)
-
-    with torch.autocast(device_type=torch_device.type, dtype=torch.bfloat16):
-        x = (x / ae.config.scaling_factor) + ae.config.shift_factor
-        x = ae.decode(x).sample
-
-    x = x.clamp(-1, 1)
-    x = rearrange(x[0], "c h w -> h w c")
-    img = Image.fromarray((127.5 * (x + 1.0)).cpu().byte().numpy())
-    return img, seed
-
-def create_demo():
-    with gr.Blocks(css=".gradio-container {background-color: #282828 !important;}") as demo:
-        gr.HTML(
-            """
-            <div style="text-align: center; margin: 0 auto;">
-                <h1 style="color: #ffffff; font-weight: 900;">
-                    FluxLLama
-                </h1>
-            </div>
-            """
-        )
-
-        gr.HTML(
-            """
-            <div class='container' style='display:flex; justify-content:center; gap:12px;'>
-                <a href="https://huggingface.co/spaces/openfree/Best-AI" target="_blank">
-                    <img src="https://img.shields.io/static/v1?label=OpenFree&message=BEST%20AI%20Services&color=%230000ff&labelColor=%23000080&logo=huggingface&logoColor=%23ffa500&style=for-the-badge" alt="OpenFree badge">
-                </a>
-    
-                <a href="https://discord.gg/openfreeai" target="_blank">
-                    <img src="https://img.shields.io/static/v1?label=Discord&message=Openfree%20AI&color=%230000ff&labelColor=%23800080&logo=discord&logoColor=white&style=for-the-badge" alt="Discord badge">
-                </a>
-            </div>
-            """
-        )
-
-        
-        with gr.Row():
-            with gr.Column():
-                prompt = gr.Textbox(label="Prompt", value="A majestic castle on top of a floating island")
-                width = gr.Slider(minimum=128, maximum=2048, step=64, label="Width", value=640)
-                height = gr.Slider(minimum=128, maximum=2048, step=64, label="Height", value=640)
-                guidance = gr.Slider(minimum=1.0, maximum=5.0, step=0.1, label="Guidance", value=3.5)
-                inference_steps = gr.Slider(
-                    label="Inference steps",
-                    minimum=1,
-                    maximum=30,
-                    step=1,
-                    value=16,
-                )
-                seed = gr.Number(label="Seed", precision=-1)
-                do_img2img = gr.Checkbox(label="Image to Image", value=False)
-                init_image = gr.Image(label="Initial Image", visible=False)
-                image2image_strength = gr.Slider(
-                    minimum=0.0,
-                    maximum=1.0,
-                    step=0.01,
-                    label="Noising Strength",
-                    value=0.8,
-                    visible=False
-                )
-                resize_img = gr.Checkbox(label="Resize Initial Image", value=True, visible=False)
-                generate_button = gr.Button("Generate", variant="primary")
-            with gr.Column():
-                output_image = gr.Image(label="Result")
-                output_seed = gr.Text(label="Seed Used")
-
-        do_img2img.change(
-            fn=lambda x: [gr.update(visible=x), gr.update(visible=x), gr.update(visible=x)],
-            inputs=[do_img2img],
-            outputs=[init_image, image2image_strength, resize_img]
-        )
-
-        generate_button.click(
-            fn=generate_image,
-            inputs=[
-                prompt, width, height, guidance,
-                inference_steps, seed, do_img2img,
-                init_image, image2image_strength, resize_img
-            ],
-            outputs=[output_image, output_seed]
-        )
-    return demo
-
-if __name__ == "__main__":
-    # Create the demo
-    demo = create_demo()
-    # Enable the queue to handle concurrency
-    demo.queue()
-    # Launch with show_api=False and share=True to avoid the "bool is not iterable" error
-    # and the "ValueError: When localhost is not accessible..." error.
-    # Remove mcp_server=True as it's not a valid parameter
-    demo.launch(show_api=False, share=True, server_name="0.0.0.0")