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| from __future__ import annotations | |
| import gc | |
| import pathlib | |
| import sys | |
| import gradio as gr | |
| import PIL.Image | |
| import torch | |
| from diffusers import StableDiffusionPipeline | |
| sys.path.insert(0, 'lora') | |
| from lora_diffusion import monkeypatch_lora, tune_lora_scale | |
| class InferencePipeline: | |
| def __init__(self): | |
| self.pipe = None | |
| self.device = torch.device( | |
| 'cuda:0' if torch.cuda.is_available() else 'cpu') | |
| self.weight_path = None | |
| def clear(self) -> None: | |
| self.weight_path = None | |
| del self.pipe | |
| self.pipe = None | |
| torch.cuda.empty_cache() | |
| gc.collect() | |
| def get_lora_weight_path(name: str) -> pathlib.Path: | |
| curr_dir = pathlib.Path(__file__).parent | |
| return curr_dir / name | |
| def get_lora_text_encoder_weight_path(path: pathlib.Path) -> str: | |
| parent_dir = path.parent | |
| stem = path.stem | |
| text_encoder_filename = f'{stem}.text_encoder.pt' | |
| path = parent_dir / text_encoder_filename | |
| return path.as_posix() if path.exists() else '' | |
| def load_pipe(self, model_id: str, lora_filename: str) -> None: | |
| weight_path = self.get_lora_weight_path(lora_filename) | |
| if weight_path == self.weight_path: | |
| return | |
| self.weight_path = weight_path | |
| lora_weight = torch.load(self.weight_path, map_location=self.device) | |
| if self.device.type == 'cpu': | |
| pipe = StableDiffusionPipeline.from_pretrained(model_id) | |
| else: | |
| pipe = StableDiffusionPipeline.from_pretrained( | |
| model_id, torch_dtype=torch.float16) | |
| pipe = pipe.to(self.device) | |
| monkeypatch_lora(pipe.unet, lora_weight) | |
| lora_text_encoder_weight_path = self.get_lora_text_encoder_weight_path( | |
| weight_path) | |
| if lora_text_encoder_weight_path: | |
| lora_text_encoder_weight = torch.load( | |
| lora_text_encoder_weight_path, map_location=self.device) | |
| monkeypatch_lora(pipe.text_encoder, | |
| lora_text_encoder_weight, | |
| target_replace_module=['CLIPAttention']) | |
| self.pipe = pipe | |
| def run( | |
| self, | |
| base_model: str, | |
| lora_weight_name: str, | |
| prompt: str, | |
| alpha: float, | |
| alpha_for_text: float, | |
| seed: int, | |
| n_steps: int, | |
| guidance_scale: float, | |
| ) -> PIL.Image.Image: | |
| if not torch.cuda.is_available(): | |
| raise gr.Error('CUDA is not available.') | |
| self.load_pipe(base_model, lora_weight_name) | |
| generator = torch.Generator(device=self.device).manual_seed(seed) | |
| tune_lora_scale(self.pipe.unet, alpha) # type: ignore | |
| tune_lora_scale(self.pipe.text_encoder, alpha_for_text) # type: ignore | |
| out = self.pipe(prompt, | |
| num_inference_steps=n_steps, | |
| guidance_scale=guidance_scale, | |
| generator=generator) # type: ignore | |
| return out.images[0] | |