with_mask_sample.py

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.

# This source code is licensed under the license found in the
# LICENSE file in the root directory of this source tree.

"""
Sample new images from a pre-trained DiT.
"""
import os
import sys
import math
try:
    import utils
    from diffusion import create_diffusion
except:
    # sys.path.append(os.getcwd())
    sys.path.append(os.path.split(sys.path[0])[0])
    # sys.path[0]                 
    # os.path.split(sys.path[0])    
    import utils

    from diffusion import create_diffusion

import torch
torch.backends.cuda.matmul.allow_tf32 = True
torch.backends.cudnn.allow_tf32 = True
import argparse
import torchvision

from einops import rearrange
from models import get_models
from torchvision.utils import save_image
from diffusers.models import AutoencoderKL
from models.clip import TextEmbedder
from omegaconf import OmegaConf
from PIL import Image
import numpy as np
from torchvision import transforms
sys.path.append("..")
from datasets import video_transforms
from utils import mask_generation_before
from natsort import natsorted
from diffusers.utils.import_utils import is_xformers_available
import pdb

def get_input(args):
    input_path = args.input_path
    transform_video = transforms.Compose([
            video_transforms.ToTensorVideo(), # TCHW
            video_transforms.ResizeVideo((args.image_h, args.image_w)),
            transforms.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5], inplace=True)
        ])
    if input_path is not None:
        print(f'loading video from {input_path}')
        if os.path.isdir(input_path):
            file_list = os.listdir(input_path)
            video_frames = []
            if args.mask_type.startswith('onelast'):
                num = int(args.mask_type.split('onelast')[-1])
                # get first and last frame
                first_frame_path = os.path.join(input_path, natsorted(file_list)[0])
                last_frame_path = os.path.join(input_path, natsorted(file_list)[-1])
                first_frame = torch.as_tensor(np.array(Image.open(first_frame_path), dtype=np.uint8, copy=True)).unsqueeze(0)
                last_frame = torch.as_tensor(np.array(Image.open(last_frame_path), dtype=np.uint8, copy=True)).unsqueeze(0)
                for i in range(num):
                    video_frames.append(first_frame)
                # add zeros to frames
                num_zeros = args.num_frames-2*num
                for i in range(num_zeros):
                    zeros = torch.zeros_like(first_frame)
                    video_frames.append(zeros)
                for i in range(num):
                    video_frames.append(last_frame)
                n = 0
                video_frames = torch.cat(video_frames, dim=0).permute(0, 3, 1, 2) # f,c,h,w
                video_frames = transform_video(video_frames)
            else:
                for file in file_list:
                    if file.endswith('jpg') or file.endswith('png'):
                        image = torch.as_tensor(np.array(Image.open(file), dtype=np.uint8, copy=True)).unsqueeze(0)
                        video_frames.append(image)
                    else:
                        continue
                n = 0
                video_frames = torch.cat(video_frames, dim=0).permute(0, 3, 1, 2) # f,c,h,w
                video_frames = transform_video(video_frames)
            return video_frames, n
        elif os.path.isfile(input_path):
            _, full_file_name = os.path.split(input_path)
            file_name, extention = os.path.splitext(full_file_name)
            if extention == '.jpg' or extention == '.png':
                print("loading the input image")
                video_frames = []
                num = int(args.mask_type.split('first')[-1])
                first_frame = torch.as_tensor(np.array(Image.open(input_path), dtype=np.uint8, copy=True)).unsqueeze(0)
                for i in range(num):
                    video_frames.append(first_frame)
                num_zeros = args.num_frames-num
                for i in range(num_zeros):
                    zeros = torch.zeros_like(first_frame)
                    video_frames.append(zeros)
                n = 0
                video_frames = torch.cat(video_frames, dim=0).permute(0, 3, 1, 2) # f,c,h,w
                video_frames = transform_video(video_frames)
                return video_frames, n
            else:
                raise TypeError(f'{extention} is not supported !!')
        else:
            raise ValueError('Please check your path input!!')
    else:
        raise ValueError('Need to give a video or some images')

def auto_inpainting(args, video_input, masked_video, mask, prompt, vae, text_encoder, diffusion, model, device,):
    b,f,c,h,w=video_input.shape
    latent_h = args.image_size[0] // 8
    latent_w = args.image_size[1] // 8

    # prepare inputs
    if args.use_fp16:
        z = torch.randn(1, 4, args.num_frames, args.latent_h, args.latent_w, dtype=torch.float16, device=device) # b,c,f,h,w
        masked_video = masked_video.to(dtype=torch.float16)
        mask = mask.to(dtype=torch.float16)
    else:
        z = torch.randn(1, 4, args.num_frames, args.latent_h, args.latent_w, device=device) # b,c,f,h,w


    masked_video = rearrange(masked_video, 'b f c h w -> (b f) c h w').contiguous()
    masked_video = vae.encode(masked_video).latent_dist.sample().mul_(0.18215)
    masked_video = rearrange(masked_video, '(b f) c h w -> b c f h w', b=b).contiguous()
    mask = torch.nn.functional.interpolate(mask[:,:,0,:], size=(latent_h, latent_w)).unsqueeze(1)
   
    # classifier_free_guidance
    if args.do_classifier_free_guidance:
        masked_video = torch.cat([masked_video] * 2)
        mask = torch.cat([mask] * 2)
        z = torch.cat([z] * 2)
        prompt_all = [prompt] + [args.negative_prompt]
        
    else:
        masked_video = masked_video
        mask = mask
        z = z
        prompt_all = [prompt]

    text_prompt = text_encoder(text_prompts=prompt_all, train=False)
    model_kwargs = dict(encoder_hidden_states=text_prompt, 
                            class_labels=None, 
                            cfg_scale=args.cfg_scale,
                            use_fp16=args.use_fp16,) # tav unet

    # Sample video:
    if args.sample_method == 'ddim':
        samples = diffusion.ddim_sample_loop(
            model.forward_with_cfg, z.shape, z, clip_denoised=False, model_kwargs=model_kwargs, progress=True, device=device, \
            mask=mask, x_start=masked_video, use_concat=args.use_mask
        )
    elif args.sample_method == 'ddpm':
        samples = diffusion.p_sample_loop(
            model.forward_with_cfg, z.shape, z, clip_denoised=False, model_kwargs=model_kwargs, progress=True, device=device, \
            mask=mask, x_start=masked_video, use_concat=args.use_mask
        )
    samples, _ = samples.chunk(2, dim=0) # [1, 4, 16, 32, 32]
    if args.use_fp16:
        samples = samples.to(dtype=torch.float16)

    video_clip = samples[0].permute(1, 0, 2, 3).contiguous() # [16, 4, 32, 32]
    video_clip = vae.decode(video_clip / 0.18215).sample # [16, 3, 256, 256]
    return video_clip

def main(args):
    # Setup PyTorch:
    if args.seed:
        torch.manual_seed(args.seed)
    torch.set_grad_enabled(False)
    device = "cuda" if torch.cuda.is_available() else "cpu"
    # device = "cpu"

    if args.ckpt is None:
        raise ValueError("Please specify a checkpoint path using --ckpt <path>")

    # Load model:
    latent_h = args.image_size[0] // 8
    latent_w = args.image_size[1] // 8
    args.image_h = args.image_size[0]
    args.image_w = args.image_size[1]
    args.latent_h = latent_h
    args.latent_w = latent_w
    print('loading model')
    model = get_models(args).to(device)

    if args.enable_xformers_memory_efficient_attention:
        if is_xformers_available():
            model.enable_xformers_memory_efficient_attention()
        else:
            raise ValueError("xformers is not available. Make sure it is installed correctly")

    # load model 
    ckpt_path = args.ckpt 
    state_dict = torch.load(ckpt_path, map_location=lambda storage, loc: storage)['ema']
    model.load_state_dict(state_dict)
    print('loading succeed')

    model.eval()
    pretrained_model_path = args.pretrained_model_path
    diffusion = create_diffusion(str(args.num_sampling_steps))
    vae = AutoencoderKL.from_pretrained(pretrained_model_path, subfolder="vae").to(device)
    text_encoder = TextEmbedder(pretrained_model_path).to(device)
    if args.use_fp16:
        print('Warnning: using half percision for inferencing!')
        vae.to(dtype=torch.float16)
        model.to(dtype=torch.float16)
        text_encoder.to(dtype=torch.float16)

    # prompt:
    prompt = args.text_prompt
    if prompt ==[]:
        prompt = args.input_path.split('/')[-1].split('.')[0].replace('_', ' ')
    else:
        prompt = prompt[0]
    prompt_base = prompt.replace(' ','_')
    prompt = prompt + args.additional_prompt

    if not os.path.exists(os.path.join(args.save_path)):
        os.makedirs(os.path.join(args.save_path))
    video_input, researve_frames = get_input(args) # f,c,h,w
    video_input = video_input.to(device).unsqueeze(0) # b,f,c,h,w
    mask = mask_generation_before(args.mask_type, video_input.shape, video_input.dtype, device) # b,f,c,h,w
    masked_video = video_input * (mask == 0)

    video_clip = auto_inpainting(args, video_input, masked_video, mask, prompt, vae, text_encoder, diffusion, model, device,)
    video_ = ((video_clip * 0.5 + 0.5) * 255).add_(0.5).clamp_(0, 255).to(dtype=torch.uint8).cpu().permute(0, 2, 3, 1)
    save_video_path = os.path.join(args.save_path,  prompt_base+ '.mp4')
    torchvision.io.write_video(save_video_path, video_, fps=8)
    print(f'save in {save_video_path}')


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--config", type=str, default="./configs/sample_mask.yaml")
    args = parser.parse_args()
    omega_conf = OmegaConf.load(args.config)
    main(omega_conf)