mirror of
https://github.com/Wan-Video/Wan2.1.git
synced 2025-11-04 22:26:36 +00:00
418 lines
19 KiB
Python
418 lines
19 KiB
Python
import math
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import os
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from typing import List
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from typing import Optional
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from typing import Tuple
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from typing import Union
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import logging
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import numpy as np
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import torch
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from diffusers.image_processor import PipelineImageInput
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from diffusers.utils.torch_utils import randn_tensor
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from diffusers.video_processor import VideoProcessor
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from tqdm import tqdm
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from .modules.model import WanModel
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from .modules.t5 import T5EncoderModel
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from .modules.vae import WanVAE
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from wan.modules.posemb_layers import get_rotary_pos_embed
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from wan.utils.utils import calculate_new_dimensions
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from .utils.fm_solvers import (FlowDPMSolverMultistepScheduler,
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get_sampling_sigmas, retrieve_timesteps)
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from .utils.fm_solvers_unipc import FlowUniPCMultistepScheduler
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class DTT2V:
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def __init__(
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self,
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config,
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checkpoint_dir,
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rank=0,
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model_filename = None,
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text_encoder_filename = None,
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quantizeTransformer = False,
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dtype = torch.bfloat16,
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VAE_dtype = torch.float32,
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mixed_precision_transformer = False,
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):
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self.device = torch.device(f"cuda")
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self.config = config
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self.rank = rank
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self.dtype = dtype
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self.num_train_timesteps = config.num_train_timesteps
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self.param_dtype = config.param_dtype
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self.text_encoder = T5EncoderModel(
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text_len=config.text_len,
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dtype=config.t5_dtype,
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device=torch.device('cpu'),
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checkpoint_path=text_encoder_filename,
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tokenizer_path=os.path.join(checkpoint_dir, config.t5_tokenizer),
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shard_fn= None)
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self.vae_stride = config.vae_stride
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self.patch_size = config.patch_size
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self.vae = WanVAE(
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vae_pth=os.path.join(checkpoint_dir, config.vae_checkpoint), dtype= VAE_dtype,
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device=self.device)
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logging.info(f"Creating WanModel from {model_filename[-1]}")
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from mmgp import offload
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# model_filename = "model.safetensors"
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# model_filename = "c:/temp/diffusion_pytorch_model-00001-of-00006.safetensors"
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self.model = offload.fast_load_transformers_model(model_filename, modelClass=WanModel,do_quantize= quantizeTransformer, writable_tensors= False) # , forcedConfigPath="c:/temp/config _df720.json")
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# offload.load_model_data(self.model, "recam.ckpt")
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# self.model.cpu()
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# dtype = torch.float16
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self.model.lock_layers_dtypes(torch.float32 if mixed_precision_transformer else dtype)
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offload.change_dtype(self.model, dtype, True)
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# offload.save_model(self.model, "sky_reels2_diffusion_forcing_1.3B_mbf16.safetensors", config_file_path="config.json")
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# offload.save_model(self.model, "sky_reels2_diffusion_forcing_720p_14B_quanto_mbf16_int8.safetensors", do_quantize= True, config_file_path="c:/temp/config _df720.json")
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# offload.save_model(self.model, "rtfp16_int8.safetensors", do_quantize= "config.json")
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self.model.eval().requires_grad_(False)
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self.scheduler = FlowUniPCMultistepScheduler()
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@property
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def do_classifier_free_guidance(self) -> bool:
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return self._guidance_scale > 1
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def encode_image(
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self, image_start: PipelineImageInput, height: int, width: int, num_frames: int, tile_size = 0, causal_block_size = 0
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) -> Tuple[torch.Tensor, torch.Tensor, torch.Tensor]:
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# prefix_video
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prefix_video = np.array(image_start.resize((width, height))).transpose(2, 0, 1)
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prefix_video = torch.tensor(prefix_video).unsqueeze(1) # .to(image_embeds.dtype).unsqueeze(1)
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if prefix_video.dtype == torch.uint8:
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prefix_video = (prefix_video.float() / (255.0 / 2.0)) - 1.0
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prefix_video = prefix_video.to(self.device)
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prefix_video = [self.vae.encode(prefix_video.unsqueeze(0), tile_size = tile_size)[0]] # [(c, f, h, w)]
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if prefix_video[0].shape[1] % causal_block_size != 0:
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truncate_len = prefix_video[0].shape[1] % causal_block_size
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print("the length of prefix video is truncated for the casual block size alignment.")
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prefix_video[0] = prefix_video[0][:, : prefix_video[0].shape[1] - truncate_len]
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predix_video_latent_length = prefix_video[0].shape[1]
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return prefix_video, predix_video_latent_length
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def prepare_latents(
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self,
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shape: Tuple[int],
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dtype: Optional[torch.dtype] = None,
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device: Optional[torch.device] = None,
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generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None,
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) -> torch.Tensor:
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return randn_tensor(shape, generator, device=device, dtype=dtype)
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def generate_timestep_matrix(
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self,
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num_frames,
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step_template,
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base_num_frames,
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ar_step=5,
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num_pre_ready=0,
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casual_block_size=1,
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shrink_interval_with_mask=False,
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) -> tuple[torch.Tensor, torch.Tensor, torch.Tensor, list[tuple]]:
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step_matrix, step_index = [], []
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update_mask, valid_interval = [], []
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num_iterations = len(step_template) + 1
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num_frames_block = num_frames // casual_block_size
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base_num_frames_block = base_num_frames // casual_block_size
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if base_num_frames_block < num_frames_block:
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infer_step_num = len(step_template)
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gen_block = base_num_frames_block
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min_ar_step = infer_step_num / gen_block
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assert ar_step >= min_ar_step, f"ar_step should be at least {math.ceil(min_ar_step)} in your setting"
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# print(num_frames, step_template, base_num_frames, ar_step, num_pre_ready, casual_block_size, num_frames_block, base_num_frames_block)
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step_template = torch.cat(
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[
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torch.tensor([999], dtype=torch.int64, device=step_template.device),
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step_template.long(),
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torch.tensor([0], dtype=torch.int64, device=step_template.device),
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]
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) # to handle the counter in row works starting from 1
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pre_row = torch.zeros(num_frames_block, dtype=torch.long)
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if num_pre_ready > 0:
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pre_row[: num_pre_ready // casual_block_size] = num_iterations
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while torch.all(pre_row >= (num_iterations - 1)) == False:
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new_row = torch.zeros(num_frames_block, dtype=torch.long)
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for i in range(num_frames_block):
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if i == 0 or pre_row[i - 1] >= (
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num_iterations - 1
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): # the first frame or the last frame is completely denoised
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new_row[i] = pre_row[i] + 1
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else:
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new_row[i] = new_row[i - 1] - ar_step
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new_row = new_row.clamp(0, num_iterations)
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update_mask.append(
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(new_row != pre_row) & (new_row != num_iterations)
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) # False: no need to update， True: need to update
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step_index.append(new_row)
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step_matrix.append(step_template[new_row])
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pre_row = new_row
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# for long video we split into several sequences, base_num_frames is set to the model max length (for training)
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terminal_flag = base_num_frames_block
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if shrink_interval_with_mask:
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idx_sequence = torch.arange(num_frames_block, dtype=torch.int64)
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update_mask = update_mask[0]
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update_mask_idx = idx_sequence[update_mask]
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last_update_idx = update_mask_idx[-1].item()
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terminal_flag = last_update_idx + 1
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# for i in range(0, len(update_mask)):
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for curr_mask in update_mask:
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if terminal_flag < num_frames_block and curr_mask[terminal_flag]:
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terminal_flag += 1
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valid_interval.append((max(terminal_flag - base_num_frames_block, 0), terminal_flag))
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step_update_mask = torch.stack(update_mask, dim=0)
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step_index = torch.stack(step_index, dim=0)
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step_matrix = torch.stack(step_matrix, dim=0)
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if casual_block_size > 1:
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step_update_mask = step_update_mask.unsqueeze(-1).repeat(1, 1, casual_block_size).flatten(1).contiguous()
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step_index = step_index.unsqueeze(-1).repeat(1, 1, casual_block_size).flatten(1).contiguous()
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step_matrix = step_matrix.unsqueeze(-1).repeat(1, 1, casual_block_size).flatten(1).contiguous()
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valid_interval = [(s * casual_block_size, e * casual_block_size) for s, e in valid_interval]
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return step_matrix, step_index, step_update_mask, valid_interval
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@torch.no_grad()
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def generate(
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self,
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input_prompt: Union[str, List[str]],
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n_prompt: Union[str, List[str]] = "",
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image_start: PipelineImageInput = None,
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input_video = None,
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height: int = 480,
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width: int = 832,
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fit_into_canvas = True,
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frame_num: int = 97,
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sampling_steps: int = 50,
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shift: float = 1.0,
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guide_scale: float = 5.0,
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seed: float = 0.0,
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overlap_noise: int = 0,
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ar_step: int = 5,
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causal_block_size: int = 5,
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causal_attention: bool = True,
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fps: int = 24,
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VAE_tile_size = 0,
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joint_pass = False,
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slg_layers = None,
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slg_start = 0.0,
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slg_end = 1.0,
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callback = None,
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**bbargs
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):
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self._interrupt = False
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generator = torch.Generator(device=self.device)
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generator.manual_seed(seed)
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self._guidance_scale = guide_scale
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frame_num = max(17, frame_num) # must match causal_block_size for value of 5
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frame_num = int( round( (frame_num - 17) / 20)* 20 + 17 )
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if ar_step == 0:
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causal_block_size = 1
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causal_attention = False
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i2v_extra_kwrags = {}
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prefix_video = None
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predix_video_latent_length = 0
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if input_video != None:
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_ , _ , height, width = input_video.shape
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elif image_start != None:
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image_start = image_start[0]
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frame_width, frame_height = image_start.size
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height, width = calculate_new_dimensions(height, width, frame_height, frame_width, fit_into_canvas)
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image_start = np.array(image_start.resize((width, height))).transpose(2, 0, 1)
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latent_length = (frame_num - 1) // 4 + 1
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latent_height = height // 8
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latent_width = width // 8
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if self._interrupt:
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return None
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prompt_embeds = self.text_encoder([input_prompt], self.device)[0]
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prompt_embeds = prompt_embeds.to(self.dtype).to(self.device)
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if self.do_classifier_free_guidance:
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negative_prompt_embeds = self.text_encoder([n_prompt], self.device)[0]
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negative_prompt_embeds = negative_prompt_embeds.to(self.dtype).to(self.device)
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if self._interrupt:
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return None
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self.scheduler.set_timesteps(sampling_steps, device=self.device, shift=shift)
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init_timesteps = self.scheduler.timesteps
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fps_embeds = [fps] #* prompt_embeds[0].shape[0]
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fps_embeds = [0 if i == 16 else 1 for i in fps_embeds]
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output_video = input_video
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if image_start is not None or output_video is not None: # i !=0
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if output_video is not None:
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prefix_video = output_video.to(self.device)
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else:
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causal_block_size = 1
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causal_attention = False
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ar_step = 0
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prefix_video = image_start
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prefix_video = torch.tensor(prefix_video).unsqueeze(1) # .to(image_embeds.dtype).unsqueeze(1)
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if prefix_video.dtype == torch.uint8:
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prefix_video = (prefix_video.float() / (255.0 / 2.0)) - 1.0
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prefix_video = prefix_video.to(self.device)
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prefix_video = self.vae.encode(prefix_video.unsqueeze(0))[0] # [(c, f, h, w)]
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predix_video_latent_length = prefix_video.shape[1]
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truncate_len = predix_video_latent_length % causal_block_size
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if truncate_len != 0:
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if truncate_len == predix_video_latent_length:
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causal_block_size = 1
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causal_attention = False
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ar_step = 0
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else:
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print("the length of prefix video is truncated for the casual block size alignment.")
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predix_video_latent_length -= truncate_len
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prefix_video = prefix_video[:, : predix_video_latent_length]
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base_num_frames_iter = latent_length
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latent_shape = [16, base_num_frames_iter, latent_height, latent_width]
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latents = self.prepare_latents(
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latent_shape, dtype=torch.float32, device=self.device, generator=generator
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)
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if prefix_video is not None:
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latents[:, :predix_video_latent_length] = prefix_video.to(torch.float32)
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step_matrix, _, step_update_mask, valid_interval = self.generate_timestep_matrix(
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base_num_frames_iter,
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init_timesteps,
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base_num_frames_iter,
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ar_step,
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predix_video_latent_length,
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causal_block_size,
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)
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sample_schedulers = []
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for _ in range(base_num_frames_iter):
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sample_scheduler = FlowUniPCMultistepScheduler(
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num_train_timesteps=1000, shift=1, use_dynamic_shifting=False
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)
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sample_scheduler.set_timesteps(sampling_steps, device=self.device, shift=shift)
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sample_schedulers.append(sample_scheduler)
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sample_schedulers_counter = [0] * base_num_frames_iter
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updated_num_steps= len(step_matrix)
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if callback != None:
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callback(-1, None, True, override_num_inference_steps = updated_num_steps)
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if self.model.enable_teacache:
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x_count = 2 if self.do_classifier_free_guidance else 1
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self.model.previous_residual = [None] * x_count
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time_steps_comb = []
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self.model.num_steps = updated_num_steps
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for i, timestep_i in enumerate(step_matrix):
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valid_interval_start, valid_interval_end = valid_interval[i]
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timestep = timestep_i[None, valid_interval_start:valid_interval_end].clone()
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if overlap_noise > 0 and valid_interval_start < predix_video_latent_length:
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timestep[:, valid_interval_start:predix_video_latent_length] = overlap_noise
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time_steps_comb.append(timestep)
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self.model.compute_teacache_threshold(self.model.teacache_start_step, time_steps_comb, self.model.teacache_multiplier)
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del time_steps_comb
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from mmgp import offload
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freqs = get_rotary_pos_embed(latents.shape[1 :], enable_RIFLEx= False)
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kwrags = {
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"freqs" :freqs,
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"fps" : fps_embeds,
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"causal_block_size" : causal_block_size,
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"causal_attention" : causal_attention,
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"callback" : callback,
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"pipeline" : self,
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}
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kwrags.update(i2v_extra_kwrags)
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for i, timestep_i in enumerate(tqdm(step_matrix)):
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kwrags["slg_layers"] = slg_layers if int(slg_start * updated_num_steps) <= i < int(slg_end * updated_num_steps) else None
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offload.set_step_no_for_lora(self.model, i)
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update_mask_i = step_update_mask[i]
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valid_interval_start, valid_interval_end = valid_interval[i]
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timestep = timestep_i[None, valid_interval_start:valid_interval_end].clone()
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latent_model_input = latents[:, valid_interval_start:valid_interval_end, :, :].clone()
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if overlap_noise > 0 and valid_interval_start < predix_video_latent_length:
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noise_factor = 0.001 * overlap_noise
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timestep_for_noised_condition = overlap_noise
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latent_model_input[:, valid_interval_start:predix_video_latent_length] = (
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latent_model_input[:, valid_interval_start:predix_video_latent_length]
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* (1.0 - noise_factor)
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+ torch.randn_like(
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latent_model_input[:, valid_interval_start:predix_video_latent_length]
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)
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* noise_factor
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)
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timestep[:, valid_interval_start:predix_video_latent_length] = timestep_for_noised_condition
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kwrags.update({
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"t" : timestep,
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"current_step" : i,
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})
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# with torch.autocast(device_type="cuda"):
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if True:
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if not self.do_classifier_free_guidance:
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noise_pred = self.model(
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x=[latent_model_input],
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context=[prompt_embeds],
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**kwrags,
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)[0]
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if self._interrupt:
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return None
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noise_pred= noise_pred.to(torch.float32)
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else:
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if joint_pass:
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noise_pred_cond, noise_pred_uncond = self.model(
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x=[latent_model_input, latent_model_input],
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context= [prompt_embeds, negative_prompt_embeds],
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**kwrags,
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)
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if self._interrupt:
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return None
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else:
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noise_pred_cond = self.model(
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x=[latent_model_input],
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x_id=0,
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context=[prompt_embeds],
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**kwrags,
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)[0]
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if self._interrupt:
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return None
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noise_pred_uncond = self.model(
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x=[latent_model_input],
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x_id=1,
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context=[negative_prompt_embeds],
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**kwrags,
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)[0]
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if self._interrupt:
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return None
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noise_pred = noise_pred_uncond + guide_scale * (noise_pred_cond - noise_pred_uncond)
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del noise_pred_cond, noise_pred_uncond
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for idx in range(valid_interval_start, valid_interval_end):
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if update_mask_i[idx].item():
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latents[:, idx] = sample_schedulers[idx].step(
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noise_pred[:, idx - valid_interval_start],
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timestep_i[idx],
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latents[:, idx],
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return_dict=False,
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generator=generator,
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)[0]
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sample_schedulers_counter[idx] += 1
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if callback is not None:
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callback(i, latents.squeeze(0), False)
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x0 = latents.unsqueeze(0)
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videos = [self.vae.decode(x0, tile_size= VAE_tile_size)[0]]
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output_video = videos[0].clamp(-1, 1).cpu() # c, f, h, w
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return output_video
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