handler.py

#!/usr/bin/env python3

from typing import Dict, Any
import torch
from PIL import Image
import base64
from io import BytesIO
import numpy as np
from diffusers import AutoencoderKL, DDIMScheduler
from einops import repeat
from omegaconf import OmegaConf
from transformers import CLIPVisionModelWithProjection
import cv2
import os
import sys
import skvideo.io
from src.models.pose_guider import PoseGuider
from src.models.unet_2d_condition import UNet2DConditionModel
from src.models.unet_3d import UNet3DConditionModel
from src.pipelines.pipeline_pose2vid_long import Pose2VideoPipeline
from src.utils.util import read_frames, get_fps, save_videos_grid
import roop.globals
from roop.core import start, decode_execution_providers, suggest_max_memory, suggest_execution_threads
from roop.utilities import normalize_output_path
from roop.processors.frame.core import get_frame_processors_modules

# import onnxruntime as ort
import gc
import subprocess

import requests
import tempfile

from rembg import remove
import onnxruntime as ort
import shutil

device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')

if device.type != 'cuda':
    raise ValueError("The model requires a GPU for inference.")

class EndpointHandler():
    def __init__(self, path=""):
        base_dir = os.path.dirname(os.path.abspath(__file__))
        config_path = os.path.join(base_dir, 'configs', 'prompts', 'animation.yaml')

        if not os.path.exists(config_path):
            raise FileNotFoundError(f"The configuration file was not found at: {config_path}")

        self.config = OmegaConf.load(config_path)
        self.weight_dtype = torch.float16
        self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
        self.pipeline = None
        self._initialize_pipeline()

    def _initialize_pipeline(self):
        base_dir = os.path.dirname(os.path.abspath(__file__))
        config_path = os.path.join(base_dir, 'pretrained_weights', 'sd-vae-ft-mse')

        if not os.path.exists(config_path):
            raise FileNotFoundError(f"The sd-vae-ft-mse folder was not found at: {config_path}")

        vae = AutoencoderKL.from_pretrained(config_path).to(self.device, dtype=self.weight_dtype)

        pretrained_base_model_path_unet = os.path.join(base_dir, 'pretrained_weights', 'stable-diffusion-v1-5', 'unet')
        print("model path is " + pretrained_base_model_path_unet)
        reference_unet = UNet2DConditionModel.from_pretrained(
            pretrained_base_model_path_unet
        ).to(dtype=self.weight_dtype, device=self.device)

        inference_config_path = os.path.join(base_dir, 'configs', 'inference', 'inference_v2.yaml')
        motion_module_path = os.path.join(base_dir, 'pretrained_weights', 'motion_module.pth')
        denoising_unet_path = os.path.join(base_dir, 'pretrained_weights', 'denoising_unet.pth')
        reference_unet_path = os.path.join(base_dir, 'pretrained_weights', 'reference_unet.pth')
        pose_guider_path = os.path.join(base_dir, 'pretrained_weights', 'pose_guider.pth')
        image_encoder_path = os.path.join(base_dir, 'pretrained_weights', 'image_encoder')

        infer_config = OmegaConf.load(inference_config_path)
        denoising_unet = UNet3DConditionModel.from_pretrained_2d(
            pretrained_base_model_path_unet,
            motion_module_path,
            unet_additional_kwargs=infer_config.unet_additional_kwargs,
        ).to(self.device, dtype=self.weight_dtype)

        pose_guider = PoseGuider(320, block_out_channels=(16, 32, 96, 256)).to(self.device, dtype=self.weight_dtype)
        image_enc = CLIPVisionModelWithProjection.from_pretrained(image_encoder_path).to(self.device, dtype=self.weight_dtype)
        sched_kwargs = OmegaConf.to_container(infer_config.noise_scheduler_kwargs)
        scheduler = DDIMScheduler(**sched_kwargs)

        denoising_unet.load_state_dict(torch.load(denoising_unet_path, map_location="cpu"), strict=False)
        reference_unet.load_state_dict(torch.load(reference_unet_path, map_location="cpu"))
        pose_guider.load_state_dict(torch.load(pose_guider_path, map_location="cpu"))

        self.pipeline = Pose2VideoPipeline(
            vae=vae,
            image_encoder=image_enc,
            reference_unet=reference_unet,
            denoising_unet=denoising_unet,
            pose_guider=pose_guider,
            scheduler=scheduler
        ).to(self.device, dtype=self.weight_dtype)

    def _crop_face(self, image, save_path="cropped_face.jpg", margin=0.5):
        # Convert image to OpenCV format
        cv_image = np.array(image)
        cv_image = cv_image[:, :, ::-1].copy()

        # Load OpenCV face detector
        face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + 'haarcascade_frontalface_default.xml')

        # Detect faces
        gray = cv2.cvtColor(cv_image, cv2.COLOR_BGR2GRAY)
        faces = face_cascade.detectMultiScale(gray, 1.1, 4)

        if len(faces) == 0:
            raise ValueError("No faces detected in the reference image.")

        # Crop the first face found with a margin
        x, y, w, h = faces[0]
        x_margin = int(margin * w)
        y_margin = int(margin * h)

        x1 = max(0, x - x_margin)
        y1 = max(0, y - y_margin // 2)  # Less margin at the top
        x2 = min(cv_image.shape[1], x + w + x_margin)
        y2 = min(cv_image.shape[0], y + h + y_margin)  # More margin at the bottom

        cropped_face = cv_image[y1:y2, x1:x2]

        # Convert back to PIL format
        cropped_face = Image.fromarray(cropped_face[:, :, ::-1]).convert("RGB")

        # Save the cropped face
        cropped_face.save(save_path, format="JPEG", quality=95)

        return cropped_face

    def _swap_face(self, source_path, target_video_path, output_path):
        # source_path = "input.jpg"
        # source_image.save(source_path, format="JPEG", quality=95)

        roop.globals.source_path = source_path
        roop.globals.target_path = target_video_path
        roop.globals.output_path = output_path
        roop.globals.frame_processors = ["face_swapper", "face_enhancer"]
        roop.globals.headless = True
        roop.globals.keep_fps = True
        roop.globals.keep_audio = True
        roop.globals.keep_frames = False
        roop.globals.many_faces = False
        # roop.globals.video_encoder = "libx264"
        roop.globals.video_quality = 50
        roop.globals.max_memory = suggest_max_memory()

        # Set GPU execution provider
        roop.globals.execution_providers = decode_execution_providers(["CUDAExecutionProvider"])
        roop.globals.execution_threads = suggest_execution_threads()

        # Ensure onnxruntime is using the GPU
        ort.set_default_logger_severity(3)  # Suppress verbose logging
        providers = ['CUDAExecutionProvider']
        options = ort.SessionOptions()
        options.intra_op_num_threads = 1

        for frame_processor in get_frame_processors_modules(roop.globals.frame_processors):
            if hasattr(frame_processor, 'onnx_session'):
                frame_processor.onnx_session.set_providers(providers, options)

        # Clear CUDA cache before starting the face swapping process
        torch.cuda.empty_cache()

        start()

        # Clear CUDA cache after the face swapping process
        for frame_processor in roop.globals.frame_processors:
            del frame_processor
        torch.cuda.empty_cache()

        return os.path.join(os.getcwd(), output_path)

    def print_memory_stat_for_stuff(self, phase, log_file="memory_stats.log"):
        with open(log_file, "a") as f:
            f.write(f"Memory Stats - {phase}:\n")
            f.write(f"Allocated memory: {torch.cuda.memory_allocated() / 1024**2:.2f} MB\n")
            f.write(f"Reserved memory: {torch.cuda.memory_reserved() / 1024**2:.2f} MB\n")
            f.write(f"Max allocated memory: {torch.cuda.max_memory_allocated() / 1024**2:.2f} MB\n")
            f.write(f"Max reserved memory: {torch.cuda.max_memory_reserved() / 1024**2:.2f} MB\n")
            f.write("="*30 + "\n")

    def convert_to_playable_format(self, input_path, output_path):
        with tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") as tmp_file:
            temp_output_path = tmp_file.name

        command = f"ffmpeg -i {input_path} -c:v libx264 -preset fast -crf 18 -y {temp_output_path}"

        # Run the command with shell=True
        result = subprocess.run(command, shell=True, capture_output=True, text=True)
        print("Conversion STDOUT:", result.stdout)
        print("Conversion STDERR:", result.stderr)
        
        if result.returncode != 0:
            raise RuntimeError(f"FFmpeg conversion failed with exit code {result.returncode}")

        shutil.move(temp_output_path, output_path)

    def run_rife_interpolation(self, video_path, output_path, multi=2, scale=1.0):
        base_dir = os.path.dirname(os.path.abspath(__file__))
        directory = os.path.join(base_dir, "Practical-RIFE", "inference_video.py")
        model_directory = os.path.join(base_dir, "Practical-RIFE", "train_log")
        command = f"python3 {directory} --video={video_path} --output={output_path} --multi={multi} --scale={scale} --model={model_directory}"

        # Run the command with shell=True
        result = subprocess.run(command, shell=True, capture_output=True, text=True)
        print(result)
        print(result.stdout)
        print(result.stderr)
        
        if result.returncode != 0:
            raise RuntimeError(f"RIFE interpolation failed with exit code {result.returncode}")
        
        # Overwrite the RIFE output with the converted playable format
        self.convert_to_playable_format(output_path, output_path)

    def speed_up_video(self, input_path, output_path, factor=4):
        command = f"ffmpeg -i {input_path} -filter:v setpts=PTS/{factor} -an {output_path}"

        # Run the command with shell=True
        result = subprocess.run(command, shell=True, capture_output=True, text=True)
        print("Speed Up Video STDOUT:", result.stdout)
        print("Speed Up Video STDERR:", result.stderr)
        
        if result.returncode != 0:
            raise RuntimeError(f"FFmpeg speed up failed with exit code {result.returncode}")

    def slow_down_video(self, input_path, output_path, factor=4):
        command = f"ffmpeg -i {input_path} -filter:v setpts={factor}*PTS -an {output_path}"

        # Run the command with shell=True
        result = subprocess.run(command, shell=True, capture_output=True, text=True)
        print("Slow Down Video STDOUT:", result.stdout)
        print("Slow Down Video STDERR:", result.stderr)
        
        if result.returncode != 0:
            raise RuntimeError(f"FFmpeg slow down failed with exit code {result.returncode}")

    def download_file(self, url: str, save_path: str):
        response = requests.get(url, stream=True)
        if response.status_code == 200:
            with open(save_path, 'wb') as f:
                for chunk in response.iter_content(chunk_size=8192):
                    f.write(chunk)
        else:
            raise ValueError(f"Failed to download file from {url}")

    def print_directory_contents(self, directory):
        for root, dirs, files in os.walk(directory):
            level = root.replace(directory, '').count(os.sep)
            indent = ' ' * 4 * (level)
            print(f"{indent}{os.path.basename(root)}/")
            subindent = ' ' * 4 * (level + 1)
            for f in files:
                print(f"{subindent}{f}")

    def __call__(self, data: Any) -> Dict[str, str]:
        inputs = data.get("inputs", {})
        ref_image_url = inputs.get("ref_image_url", "")
        video_url = inputs.get("video_url", "")
        width = inputs.get("width", 512)
        height = inputs.get("height", 768)
        length = inputs.get("length", 24)
        num_inference_steps = inputs.get("num_inference_steps", 25)
        cfg = inputs.get("cfg", 3.5)
        seed = inputs.get("seed", 123)

        # Create a unique temporary directory for this request
        with tempfile.TemporaryDirectory() as temp_dir:
            print(f"Temporary directory created at {temp_dir}")  # Debug statement
            video_root = os.path.join(temp_dir, "dw_poses_videos")
            os.makedirs(video_root, exist_ok=True)
            downloaded_video_path = os.path.join(video_root, "downloaded_video.mp4")
            downloaded_image_path = os.path.join(video_root, "downloaded_image.jpg")

            # Download the video from the URL
            self.download_file(video_url, downloaded_video_path)

            # Download the reference image from the URL
            self.download_file(ref_image_url, downloaded_image_path)
            ref_image = Image.open(downloaded_image_path)

            # Calculate new dimensions
            original_width, original_height = ref_image.size
            max_dimension = max(original_width, original_height)
            if max_dimension > 600:
                ratio = max_dimension / 600
                width = int(original_width / ratio)
                height = int(original_height / ratio)
            else:
                width = original_width
                height = original_height

            # Remove the background from the reference image
            ref_image_no_bg = remove(ref_image)
            ref_image_no_bg_path = os.path.join(video_root, "ref_image_no_bg.png")
            ref_image_no_bg.save(ref_image_no_bg_path)

            pose_output_path = os.path.join(temp_dir, "pose_videos")

            # Run the extract_dwpose_from_vid.py script
            command = f'python3 extract_dwpose_from_vid.py --video_root {video_root}'

            # Run the command with shell=True
            result = subprocess.run(command, shell=True, capture_output=True, text=True)
            if result.returncode != 0:
                raise RuntimeError(f"Error running extract_dwpose_from_vid.py: {result.stderr}")

            # Locate the extracted pose video
            save_dir = video_root + "_dwpose"
            print(f"Expected save directory: {save_dir}")  # Debug statement
            pose_video_path = os.path.join(save_dir, "downloaded_video.mp4")

            if not os.path.exists(pose_video_path):
                print("Contents of the temporary directory:")
                self.print_directory_contents(temp_dir)
                raise FileNotFoundError(f"The pose video was not found at: {pose_video_path}")

            # Speed up the pose video by 4x
            sped_up_pose_video_path = os.path.join(temp_dir, "sped_up_pose_video.mp4")
            self.speed_up_video(pose_video_path, sped_up_pose_video_path, factor=4)

            torch.manual_seed(seed)
            pose_images = read_frames(sped_up_pose_video_path)
            src_fps = get_fps(sped_up_pose_video_path)
            
            pose_list = []
            total_length = min(length, len(pose_images))
            for pose_image_pil in pose_images[:total_length]:
                pose_list.append(pose_image_pil)

            video = self.pipeline(
                ref_image_no_bg,
                pose_list,
                width=width,
                height=height,
                video_length=total_length,
                num_inference_steps=num_inference_steps,
                guidance_scale=cfg
            ).videos

            save_dir = os.path.join(temp_dir, "output")
            if not os.path.exists(save_dir):
                os.makedirs(save_dir, exist_ok=True)
            animation_path = os.path.join(save_dir, "animation_output.mp4")
            save_videos_grid(video, animation_path, n_rows=1, fps=src_fps)

            # Crop the face from the reference image and save it
            cropped_face_path = os.path.join(save_dir, "cropped_face.jpg")
            cropped_face = self._crop_face(ref_image_no_bg, save_path=cropped_face_path)

            # Delete the pipeline and clear CUDA cache to free up memory
            del self.pipeline
            torch.cuda.empty_cache()

            # Perform face swapping
            # self.print_directory_contents(temp_dir)
            swapped_face_video_path = os.path.join(save_dir, "swapped_face_output.mp4")
            self._swap_face('./good_face.jpeg', animation_path, swapped_face_video_path)

            # Slow down the produced video by 4x
            self.print_directory_contents(temp_dir)
            slowed_down_animation_path = os.path.join(save_dir, "slowed_down_animation_output.mp4")
            self.slow_down_video(swapped_face_video_path, slowed_down_animation_path, factor=4)

            # Clear CUDA cache before RIFE interpolation
            torch.cuda.empty_cache()

            # Perform RIFE interpolation
            # self.print_directory_contents(temp_dir)
            rife_output_path = os.path.join(save_dir, "completed_result.mp4")
            self.run_rife_interpolation(slowed_down_animation_path, rife_output_path, multi=2, scale=0.5)

            # Encode the final video in base64
            with open(rife_output_path, "rb") as video_file:
                video_base64 = base64.b64encode(video_file.read()).decode("utf-8")

            torch.cuda.empty_cache()

            return {"video": video_base64}