wan_video.py

import torch, types
import numpy as np
from PIL import Image
from einops import repeat
from typing import Optional, Union
from einops import rearrange
import numpy as np
from PIL import Image
from tqdm import tqdm
from typing import Optional
from typing_extensions import Literal
from transformers import Wav2Vec2Processor

from ..core.device.npu_compatible_device import get_device_type
from ..diffusion import FlowMatchScheduler
from ..core import ModelConfig, gradient_checkpoint_forward
from ..diffusion.base_pipeline import BasePipeline, PipelineUnit

from ..models.wan_video_dit import WanModel, sinusoidal_embedding_1d
from ..models.wan_video_dit_s2v import rope_precompute
from ..models.wan_video_text_encoder import WanTextEncoder, HuggingfaceTokenizer
from ..models.wan_video_vae import WanVideoVAE
from ..models.wan_video_image_encoder import WanImageEncoder
from ..models.wan_video_vace import VaceWanModel
from ..models.wan_video_motion_controller import WanMotionControllerModel
from ..models.wan_video_animate_adapter import WanAnimateAdapter
from ..models.wan_video_mot import MotWanModel
from ..models.wav2vec import WanS2VAudioEncoder
from ..models.longcat_video_dit import LongCatVideoTransformer3DModel


class WanVideoPipeline(BasePipeline):

    def __init__(self, device=get_device_type(), torch_dtype=torch.bfloat16, sp_size=1):
        super().__init__(
            device=device, torch_dtype=torch_dtype,
            height_division_factor=16, width_division_factor=16, time_division_factor=4, time_division_remainder=1
        )
        self.scheduler = FlowMatchScheduler("Wan")
        self.tokenizer: HuggingfaceTokenizer = None
        self.audio_processor: Wav2Vec2Processor = None
        self.text_encoder: WanTextEncoder = None
        self.image_encoder: WanImageEncoder = None
        self.dit: WanModel = None
        self.dit2: WanModel = None
        self.vae: WanVideoVAE = None
        self.motion_controller: WanMotionControllerModel = None
        self.vace: VaceWanModel = None
        self.vace2: VaceWanModel = None
        self.vap: MotWanModel = None
        self.animate_adapter: WanAnimateAdapter = None
        self.audio_encoder: WanS2VAudioEncoder = None
        self.in_iteration_models = ("dit", "motion_controller", "vace", "animate_adapter", "vap")
        self.in_iteration_models_2 = ("dit2", "motion_controller", "vace2", "animate_adapter", "vap")
        self.units = [
            WanVideoUnit_ShapeChecker(),
            WanVideoUnit_NoiseInitializer(),
            WanVideoUnit_PromptEmbedder(),
            WanVideoUnit_S2V(),
            WanVideoUnit_InputVideoEmbedder(),
            WanVideoUnit_ImageEmbedderVAE(),
            WanVideoUnit_ImageEmbedderCLIP(),
            WanVideoUnit_ImageEmbedderFused(),
            WanVideoUnit_FunControl(),
            WanVideoUnit_FunReference(),
            WanVideoUnit_FunCameraControl(),
            WanVideoUnit_SpeedControl(),
            WanVideoUnit_VACE(),
            WanVideoUnit_AnimateVideoSplit(),
            WanVideoUnit_AnimatePoseLatents(),
            WanVideoUnit_AnimateFacePixelValues(),
            WanVideoUnit_AnimateInpaint(),
            WanVideoUnit_VAP(),
            WanVideoUnit_UnifiedSequenceParallel(),
            WanVideoUnit_TeaCache(),
            WanVideoUnit_CfgMerger(),
            WanVideoUnit_LongCatVideo(),
        ]
        self.post_units = [
            WanVideoPostUnit_S2V(),
        ]
        self.model_fn = model_fn_wan_video
        self.sp_size = sp_size


    def enable_usp(self):
        from ..utils.xfuser import get_sequence_parallel_world_size, usp_attn_forward, usp_dit_forward

        for block in self.dit.blocks:
            block.self_attn.forward = types.MethodType(usp_attn_forward, block.self_attn)
        self.dit.forward = types.MethodType(usp_dit_forward, self.dit)
        if self.dit2 is not None:
            for block in self.dit2.blocks:
                block.self_attn.forward = types.MethodType(usp_attn_forward, block.self_attn)
            self.dit2.forward = types.MethodType(usp_dit_forward, self.dit2)
        self.use_unified_sequence_parallel = True


    @staticmethod
    def from_pretrained(
        torch_dtype: torch.dtype = torch.bfloat16,
        device: Union[str, torch.device] = get_device_type(),
        model_configs: list[ModelConfig] = [],
        tokenizer_config: ModelConfig = ModelConfig(model_id="Wan-AI/Wan2.1-T2V-1.3B", origin_file_pattern="google/umt5-xxl/"),
        audio_processor_config: ModelConfig = None,
        redirect_common_files: bool = True,
        use_usp: bool = False,
        sp_size: int = 1,
        vram_limit: float = None,
    ):
        # Redirect model path
        if redirect_common_files:
            redirect_dict = {
                "models_t5_umt5-xxl-enc-bf16.pth": ("DiffSynth-Studio/Wan-Series-Converted-Safetensors", "models_t5_umt5-xxl-enc-bf16.safetensors"),
                "models_clip_open-clip-xlm-roberta-large-vit-huge-14.pth": ("DiffSynth-Studio/Wan-Series-Converted-Safetensors", "models_clip_open-clip-xlm-roberta-large-vit-huge-14.safetensors"),
                "Wan2.1_VAE.pth": ("DiffSynth-Studio/Wan-Series-Converted-Safetensors", "Wan2.1_VAE.safetensors"),
                "Wan2.2_VAE.pth": ("DiffSynth-Studio/Wan-Series-Converted-Safetensors", "Wan2.2_VAE.safetensors"),
            }
            for model_config in model_configs:
                if model_config.origin_file_pattern is None or model_config.model_id is None:
                    continue
                if model_config.origin_file_pattern in redirect_dict and model_config.model_id != redirect_dict[model_config.origin_file_pattern][0]:
                    print(f"To avoid repeatedly downloading model files, ({model_config.model_id}, {model_config.origin_file_pattern}) is redirected to {redirect_dict[model_config.origin_file_pattern]}. You can use `redirect_common_files=False` to disable file redirection.")
                    model_config.model_id = redirect_dict[model_config.origin_file_pattern][0]
                    model_config.origin_file_pattern = redirect_dict[model_config.origin_file_pattern][1]

        if use_usp:
            from ..utils.xfuser import initialize_usp
            initialize_usp(device, sp_size)
            import torch.distributed as dist
            from ..core.device.npu_compatible_device import get_device_name
            if dist.is_available() and dist.is_initialized():
                device = get_device_name()

        # Initialize pipeline
        pipe = WanVideoPipeline(device=device, torch_dtype=torch_dtype, sp_size=sp_size)
        model_pool = pipe.download_and_load_models(model_configs, vram_limit)
        
        # Fetch models
        pipe.text_encoder = model_pool.fetch_model("wan_video_text_encoder")
        dit = model_pool.fetch_model("wan_video_dit", index=2)
        if isinstance(dit, list):
            pipe.dit, pipe.dit2 = dit
        else:
            pipe.dit = dit
        pipe.vae = model_pool.fetch_model("wan_video_vae")
        pipe.image_encoder = model_pool.fetch_model("wan_video_image_encoder")
        pipe.motion_controller = model_pool.fetch_model("wan_video_motion_controller")
        vace = model_pool.fetch_model("wan_video_vace", index=2)
        if isinstance(vace, list):
            pipe.vace, pipe.vace2 = vace
        else:
            pipe.vace = vace
        pipe.vap = model_pool.fetch_model("wan_video_vap")
        pipe.audio_encoder = model_pool.fetch_model("wans2v_audio_encoder")
        pipe.animate_adapter = model_pool.fetch_model("wan_video_animate_adapter")

        # Size division factor
        if pipe.vae is not None:
            pipe.height_division_factor = pipe.vae.upsampling_factor * 2
            pipe.width_division_factor = pipe.vae.upsampling_factor * 2

        # Initialize tokenizer and processor
        if tokenizer_config is not None:
            tokenizer_config.download_if_necessary()
            pipe.tokenizer = HuggingfaceTokenizer(name=tokenizer_config.path, seq_len=512, clean='whitespace')
        if audio_processor_config is not None:
            audio_processor_config.download_if_necessary()
            pipe.audio_processor = Wav2Vec2Processor.from_pretrained(audio_processor_config.path)
        
        # Unified Sequence Parallel
        if use_usp: pipe.enable_usp()
        
        # VRAM Management
        pipe.vram_management_enabled = pipe.check_vram_management_state()
        return pipe


    @torch.no_grad()
    def __call__(
        self,
        # Prompt
        prompt: str,
        negative_prompt: Optional[str] = "",
        # Image-to-video
        input_image: Optional[Image.Image] = None,
        # First-last-frame-to-video
        end_image: Optional[Image.Image] = None,
        # Video-to-video
        input_video: Optional[list[Image.Image]] = None,
        denoising_strength: Optional[float] = 1.0,
        # Speech-to-video
        input_audio: Optional[np.array] = None,
        audio_embeds: Optional[torch.Tensor] = None,
        audio_sample_rate: Optional[int] = 16000,
        s2v_pose_video: Optional[list[Image.Image]] = None,
        s2v_pose_latents: Optional[torch.Tensor] = None,
        motion_video: Optional[list[Image.Image]] = None,
        # ControlNet
        control_video: Optional[list[Image.Image]] = None,
        reference_image: Optional[Image.Image] = None,
        # Camera control
        camera_control_direction: Optional[Literal["Left", "Right", "Up", "Down", "LeftUp", "LeftDown", "RightUp", "RightDown"]] = None,
        camera_control_speed: Optional[float] = 1/54,
        camera_control_origin: Optional[tuple] = (0, 0.532139961, 0.946026558, 0.5, 0.5, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0),
        # VACE
        vace_video: Optional[list[Image.Image]] = None,
        vace_video_mask: Optional[Image.Image] = None,
        vace_reference_image: Optional[Image.Image] = None,
        vace_scale: Optional[float] = 1.0,
        # Animate
        animate_pose_video: Optional[list[Image.Image]] = None,
        animate_face_video: Optional[list[Image.Image]] = None,
        animate_inpaint_video: Optional[list[Image.Image]] = None,
        animate_mask_video: Optional[list[Image.Image]] = None,
        # VAP
        vap_video: Optional[list[Image.Image]] = None,
        vap_prompt: Optional[str] = " ",
        negative_vap_prompt: Optional[str] = " ",
        # Randomness
        seed: Optional[int] = None,
        rand_device: Optional[str] = "cpu",
        # Shape
        height: Optional[int] = 480,
        width: Optional[int] = 832,
        num_frames=81,
        # Classifier-free guidance
        cfg_scale: Optional[float] = 5.0,
        cfg_merge: Optional[bool] = False,
        # Boundary
        switch_DiT_boundary: Optional[float] = 0.875,
        # Scheduler
        num_inference_steps: Optional[int] = 50,
        sigma_shift: Optional[float] = 5.0,
        # Speed control
        motion_bucket_id: Optional[int] = None,
        # LongCat-Video
        longcat_video: Optional[list[Image.Image]] = None,
        # VAE tiling
        tiled: Optional[bool] = True,
        tile_size: Optional[tuple[int, int]] = (30, 52),
        tile_stride: Optional[tuple[int, int]] = (15, 26),
        # Sliding window
        sliding_window_size: Optional[int] = None,
        sliding_window_stride: Optional[int] = None,
        # Teacache
        tea_cache_l1_thresh: Optional[float] = None,
        tea_cache_model_id: Optional[str] = "",
        # progress_bar
        progress_bar_cmd=tqdm,
        output_type: Optional[Literal["quantized", "floatpoint"]] = "quantized",
    ):
        # Scheduler
        self.scheduler.set_timesteps(num_inference_steps, denoising_strength=denoising_strength, shift=sigma_shift)
        
        # Inputs
        inputs_posi = {
            "prompt": prompt,
            "vap_prompt": vap_prompt,
            "tea_cache_l1_thresh": tea_cache_l1_thresh, "tea_cache_model_id": tea_cache_model_id, "num_inference_steps": num_inference_steps,
        }
        inputs_nega = {
            "negative_prompt": negative_prompt,
            "negative_vap_prompt": negative_vap_prompt,
            "tea_cache_l1_thresh": tea_cache_l1_thresh, "tea_cache_model_id": tea_cache_model_id, "num_inference_steps": num_inference_steps,
        }
        inputs_shared = {
            "input_image": input_image,
            "end_image": end_image,
            "input_video": input_video, "denoising_strength": denoising_strength,
            "control_video": control_video, "reference_image": reference_image,
            "camera_control_direction": camera_control_direction, "camera_control_speed": camera_control_speed, "camera_control_origin": camera_control_origin,
            "vace_video": vace_video, "vace_video_mask": vace_video_mask, "vace_reference_image": vace_reference_image, "vace_scale": vace_scale,
            "seed": seed, "rand_device": rand_device,
            "height": height, "width": width, "num_frames": num_frames,
            "cfg_scale": cfg_scale, "cfg_merge": cfg_merge,
            "sigma_shift": sigma_shift,
            "motion_bucket_id": motion_bucket_id,
            "longcat_video": longcat_video,
            "tiled": tiled, "tile_size": tile_size, "tile_stride": tile_stride,
            "sliding_window_size": sliding_window_size, "sliding_window_stride": sliding_window_stride,
            "input_audio": input_audio, "audio_sample_rate": audio_sample_rate, "s2v_pose_video": s2v_pose_video, "audio_embeds": audio_embeds, "s2v_pose_latents": s2v_pose_latents, "motion_video": motion_video,
            "animate_pose_video": animate_pose_video, "animate_face_video": animate_face_video, "animate_inpaint_video": animate_inpaint_video, "animate_mask_video": animate_mask_video,
            "vap_video": vap_video, 
        }
        for unit in self.units:
            inputs_shared, inputs_posi, inputs_nega = self.unit_runner(unit, self, inputs_shared, inputs_posi, inputs_nega)

        # Denoise
        self.load_models_to_device(self.in_iteration_models)
        models = {name: getattr(self, name) for name in self.in_iteration_models}
        for progress_id, timestep in enumerate(progress_bar_cmd(self.scheduler.timesteps)):
            # Switch DiT if necessary
            if timestep.item() < switch_DiT_boundary * 1000 and self.dit2 is not None and not models["dit"] is self.dit2:
                self.load_models_to_device(self.in_iteration_models_2)
                models["dit"] = self.dit2
                models["vace"] = self.vace2
                
            # Timestep
            timestep = timestep.unsqueeze(0).to(dtype=self.torch_dtype, device=self.device)
            
            # Inference
            noise_pred_posi = self.model_fn(**models, **inputs_shared, **inputs_posi, timestep=timestep)
            if cfg_scale != 1.0:
                if cfg_merge:
                    noise_pred_posi, noise_pred_nega = noise_pred_posi.chunk(2, dim=0)
                else:
                    noise_pred_nega = self.model_fn(**models, **inputs_shared, **inputs_nega, timestep=timestep)
                noise_pred = noise_pred_nega + cfg_scale * (noise_pred_posi - noise_pred_nega)
            else:
                noise_pred = noise_pred_posi

            # Scheduler
            inputs_shared["latents"] = self.scheduler.step(noise_pred, self.scheduler.timesteps[progress_id], inputs_shared["latents"])
            if "first_frame_latents" in inputs_shared:
                inputs_shared["latents"][:, :, 0:1] = inputs_shared["first_frame_latents"]
        
        # VACE (TODO: remove it)
        if vace_reference_image is not None or (animate_pose_video is not None and animate_face_video is not None):
            if vace_reference_image is not None and isinstance(vace_reference_image, list):
                f = len(vace_reference_image)
            else:
                f = 1
            inputs_shared["latents"] = inputs_shared["latents"][:, :, f:]
        # post-denoising, pre-decoding processing logic
        for unit in self.post_units:
            inputs_shared, _, _ = self.unit_runner(unit, self, inputs_shared, inputs_posi, inputs_nega)
        # Decode
        self.load_models_to_device(['vae'])
        video = self.vae.decode(inputs_shared["latents"], device=self.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)
        if output_type == "quantized":
            video = self.vae_output_to_video(video)
        elif output_type == "floatpoint":
            pass
        self.load_models_to_device([])
        return video



class WanVideoUnit_ShapeChecker(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("height", "width", "num_frames"),
            output_params=("height", "width", "num_frames"),
        )

    def process(self, pipe: WanVideoPipeline, height, width, num_frames):
        height, width, num_frames = pipe.check_resize_height_width(height, width, num_frames)
        return {"height": height, "width": width, "num_frames": num_frames}



class WanVideoUnit_NoiseInitializer(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("height", "width", "num_frames", "seed", "rand_device", "vace_reference_image"),
            output_params=("noise",)
        )

    def process(self, pipe: WanVideoPipeline, height, width, num_frames, seed, rand_device, vace_reference_image):
        length = (num_frames - 1) // 4 + 1
        if vace_reference_image is not None:
            f = len(vace_reference_image) if isinstance(vace_reference_image, list) else 1
            length += f
        shape = (1, pipe.vae.model.z_dim, length, height // pipe.vae.upsampling_factor, width // pipe.vae.upsampling_factor)
        noise = pipe.generate_noise(shape, seed=seed, rand_device=rand_device)
        if vace_reference_image is not None:
            noise = torch.concat((noise[:, :, -f:], noise[:, :, :-f]), dim=2)
        return {"noise": noise}
    


class WanVideoUnit_InputVideoEmbedder(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("input_video", "noise", "tiled", "tile_size", "tile_stride", "vace_reference_image"),
            output_params=("latents", "input_latents"),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, input_video, noise, tiled, tile_size, tile_stride, vace_reference_image):
        if input_video is None:
            return {"latents": noise}
        pipe.load_models_to_device(self.onload_model_names)
        input_video = pipe.preprocess_video(input_video)
        input_latents = pipe.vae.encode(input_video, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
        if vace_reference_image is not None:
            if not isinstance(vace_reference_image, list):
                vace_reference_image = [vace_reference_image]
            vace_reference_image = pipe.preprocess_video(vace_reference_image)
            vace_reference_latents = pipe.vae.encode(vace_reference_image, device=pipe.device).to(dtype=pipe.torch_dtype, device=pipe.device)
            input_latents = torch.concat([vace_reference_latents, input_latents], dim=2)
        if pipe.scheduler.training:
            return {"latents": noise, "input_latents": input_latents}
        else:
            latents = pipe.scheduler.add_noise(input_latents, noise, timestep=pipe.scheduler.timesteps[0])
            return {"latents": latents}



class WanVideoUnit_PromptEmbedder(PipelineUnit):
    def __init__(self):
        super().__init__(
            seperate_cfg=True,
            input_params_posi={"prompt": "prompt", "positive": "positive"},
            input_params_nega={"prompt": "negative_prompt", "positive": "positive"},
            output_params=("context",),
            onload_model_names=("text_encoder",)
        )
    
    def encode_prompt(self, pipe: WanVideoPipeline, prompt):
        ids, mask = pipe.tokenizer(prompt, return_mask=True, add_special_tokens=True)
        ids = ids.to(pipe.device)
        mask = mask.to(pipe.device)
        seq_lens = mask.gt(0).sum(dim=1).long()
        prompt_emb = pipe.text_encoder(ids, mask)
        for i, v in enumerate(seq_lens):
            prompt_emb[:, v:] = 0
        return prompt_emb

    def process(self, pipe: WanVideoPipeline, prompt, positive) -> dict:
        pipe.load_models_to_device(self.onload_model_names)
        prompt_emb = self.encode_prompt(pipe, prompt)
        return {"context": prompt_emb}



class WanVideoUnit_ImageEmbedderCLIP(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("input_image", "end_image", "height", "width"),
            output_params=("clip_feature",),
            onload_model_names=("image_encoder",)
        )

    def process(self, pipe: WanVideoPipeline, input_image, end_image, height, width):
        if input_image is None or pipe.image_encoder is None or not pipe.dit.require_clip_embedding:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        image = pipe.preprocess_image(input_image.resize((width, height))).to(pipe.device)
        clip_context = pipe.image_encoder.encode_image([image])
        if end_image is not None:
            end_image = pipe.preprocess_image(end_image.resize((width, height))).to(pipe.device)
            if pipe.dit.has_image_pos_emb:
                clip_context = torch.concat([clip_context, pipe.image_encoder.encode_image([end_image])], dim=1)
        clip_context = clip_context.to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"clip_feature": clip_context}
    


class WanVideoUnit_ImageEmbedderVAE(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("input_image", "end_image", "num_frames", "height", "width", "tiled", "tile_size", "tile_stride"),
            output_params=("y",),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, input_image, end_image, num_frames, height, width, tiled, tile_size, tile_stride):
        if input_image is None or not pipe.dit.require_vae_embedding:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        image = pipe.preprocess_image(input_image.resize((width, height))).to(pipe.device)
        msk = torch.ones(1, num_frames, height//8, width//8, device=pipe.device)
        msk[:, 1:] = 0
        if end_image is not None:
            end_image = pipe.preprocess_image(end_image.resize((width, height))).to(pipe.device)
            vae_input = torch.concat([image.transpose(0,1), torch.zeros(3, num_frames-2, height, width).to(image.device), end_image.transpose(0,1)],dim=1)
            msk[:, -1:] = 1
        else:
            vae_input = torch.concat([image.transpose(0, 1), torch.zeros(3, num_frames-1, height, width).to(image.device)], dim=1)

        msk = torch.concat([torch.repeat_interleave(msk[:, 0:1], repeats=4, dim=1), msk[:, 1:]], dim=1)
        msk = msk.view(1, msk.shape[1] // 4, 4, height//8, width//8)
        msk = msk.transpose(1, 2)[0]
        
        y = pipe.vae.encode([vae_input.to(dtype=pipe.torch_dtype, device=pipe.device)], device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)[0]
        y = y.to(dtype=pipe.torch_dtype, device=pipe.device)
        y = torch.concat([msk, y])
        y = y.unsqueeze(0)
        y = y.to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"y": y}



class WanVideoUnit_ImageEmbedderFused(PipelineUnit):
    """
    Encode input image to latents using VAE. This unit is for Wan-AI/Wan2.2-TI2V-5B.
    """
    def __init__(self):
        super().__init__(
            input_params=("input_image", "latents", "height", "width", "tiled", "tile_size", "tile_stride"),
            output_params=("latents", "fuse_vae_embedding_in_latents", "first_frame_latents"),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, input_image, latents, height, width, tiled, tile_size, tile_stride):
        if input_image is None or not pipe.dit.fuse_vae_embedding_in_latents:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        image = pipe.preprocess_image(input_image.resize((width, height))).transpose(0, 1)
        z = pipe.vae.encode([image], device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)
        latents[:, :, 0: 1] = z
        return {"latents": latents, "fuse_vae_embedding_in_latents": True, "first_frame_latents": z}



class WanVideoUnit_FunControl(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("control_video", "num_frames", "height", "width", "tiled", "tile_size", "tile_stride", "clip_feature", "y", "latents"),
            output_params=("clip_feature", "y"),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, control_video, num_frames, height, width, tiled, tile_size, tile_stride, clip_feature, y, latents):
        if control_video is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        control_video = pipe.preprocess_video(control_video)
        control_latents = pipe.vae.encode(control_video, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
        control_latents = control_latents.to(dtype=pipe.torch_dtype, device=pipe.device)
        y_dim = pipe.dit.in_dim-control_latents.shape[1]-latents.shape[1]
        if clip_feature is None or y is None:
            clip_feature = torch.zeros((1, 257, 1280), dtype=pipe.torch_dtype, device=pipe.device)
            y = torch.zeros((1, y_dim, (num_frames - 1) // 4 + 1, height//8, width//8), dtype=pipe.torch_dtype, device=pipe.device)
        else:
            y = y[:, -y_dim:]
        y = torch.concat([control_latents, y], dim=1)
        return {"clip_feature": clip_feature, "y": y}
    


class WanVideoUnit_FunReference(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("reference_image", "height", "width", "reference_image"),
            output_params=("reference_latents", "clip_feature"),
            onload_model_names=("vae", "image_encoder")
        )

    def process(self, pipe: WanVideoPipeline, reference_image, height, width):
        if reference_image is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        reference_image = reference_image.resize((width, height))
        reference_latents = pipe.preprocess_video([reference_image])
        reference_latents = pipe.vae.encode(reference_latents, device=pipe.device)
        if pipe.image_encoder is None:
            return {"reference_latents": reference_latents}
        clip_feature = pipe.preprocess_image(reference_image)
        clip_feature = pipe.image_encoder.encode_image([clip_feature])
        return {"reference_latents": reference_latents, "clip_feature": clip_feature}



class WanVideoUnit_FunCameraControl(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("height", "width", "num_frames", "camera_control_direction", "camera_control_speed", "camera_control_origin", "latents", "input_image", "tiled", "tile_size", "tile_stride"),
            output_params=("control_camera_latents_input", "y"),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, height, width, num_frames, camera_control_direction, camera_control_speed, camera_control_origin, latents, input_image, tiled, tile_size, tile_stride):
        if camera_control_direction is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        camera_control_plucker_embedding = pipe.dit.control_adapter.process_camera_coordinates(
            camera_control_direction, num_frames, height, width, camera_control_speed, camera_control_origin)
        
        control_camera_video = camera_control_plucker_embedding[:num_frames].permute([3, 0, 1, 2]).unsqueeze(0)
        control_camera_latents = torch.concat(
            [
                torch.repeat_interleave(control_camera_video[:, :, 0:1], repeats=4, dim=2),
                control_camera_video[:, :, 1:]
            ], dim=2
        ).transpose(1, 2)
        b, f, c, h, w = control_camera_latents.shape
        control_camera_latents = control_camera_latents.contiguous().view(b, f // 4, 4, c, h, w).transpose(2, 3)
        control_camera_latents = control_camera_latents.contiguous().view(b, f // 4, c * 4, h, w).transpose(1, 2)
        control_camera_latents_input = control_camera_latents.to(device=pipe.device, dtype=pipe.torch_dtype)
        
        input_image = input_image.resize((width, height))
        input_latents = pipe.preprocess_video([input_image])
        input_latents = pipe.vae.encode(input_latents, device=pipe.device)
        y = torch.zeros_like(latents).to(pipe.device)
        y[:, :, :1] = input_latents
        y = y.to(dtype=pipe.torch_dtype, device=pipe.device)

        if y.shape[1] != pipe.dit.in_dim - latents.shape[1]:
            image = pipe.preprocess_image(input_image.resize((width, height))).to(pipe.device)
            vae_input = torch.concat([image.transpose(0, 1), torch.zeros(3, num_frames-1, height, width).to(image.device)], dim=1)
            y = pipe.vae.encode([vae_input.to(dtype=pipe.torch_dtype, device=pipe.device)], device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)[0]
            y = y.to(dtype=pipe.torch_dtype, device=pipe.device)
            msk = torch.ones(1, num_frames, height//8, width//8, device=pipe.device)
            msk[:, 1:] = 0
            msk = torch.concat([torch.repeat_interleave(msk[:, 0:1], repeats=4, dim=1), msk[:, 1:]], dim=1)
            msk = msk.view(1, msk.shape[1] // 4, 4, height//8, width//8)
            msk = msk.transpose(1, 2)[0]
            y = torch.cat([msk,y])
            y = y.unsqueeze(0)
            y = y.to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"control_camera_latents_input": control_camera_latents_input, "y": y}



class WanVideoUnit_SpeedControl(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("motion_bucket_id",),
            output_params=("motion_bucket_id",)
        )

    def process(self, pipe: WanVideoPipeline, motion_bucket_id):
        if motion_bucket_id is None:
            return {}
        motion_bucket_id = torch.Tensor((motion_bucket_id,)).to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"motion_bucket_id": motion_bucket_id}



class WanVideoUnit_VACE(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("vace_video", "vace_video_mask", "vace_reference_image", "vace_scale", "height", "width", "num_frames", "tiled", "tile_size", "tile_stride"),
            output_params=("vace_context", "vace_scale"),
            onload_model_names=("vae",)
        )

    def process(
        self,
        pipe: WanVideoPipeline,
        vace_video, vace_video_mask, vace_reference_image, vace_scale,
        height, width, num_frames,
        tiled, tile_size, tile_stride
    ):
        if vace_video is not None or vace_video_mask is not None or vace_reference_image is not None:
            pipe.load_models_to_device(["vae"])
            if vace_video is None:
                vace_video = torch.zeros((1, 3, num_frames, height, width), dtype=pipe.torch_dtype, device=pipe.device)
            else:
                vace_video = pipe.preprocess_video(vace_video)
            
            if vace_video_mask is None:
                vace_video_mask = torch.ones_like(vace_video)
            else:
                vace_video_mask = pipe.preprocess_video(vace_video_mask, min_value=0, max_value=1)
            
            inactive = vace_video * (1 - vace_video_mask) + 0 * vace_video_mask
            reactive = vace_video * vace_video_mask + 0 * (1 - vace_video_mask)
            inactive = pipe.vae.encode(inactive, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
            reactive = pipe.vae.encode(reactive, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
            vace_video_latents = torch.concat((inactive, reactive), dim=1)
            
            vace_mask_latents = rearrange(vace_video_mask[0,0], "T (H P) (W Q) -> 1 (P Q) T H W", P=8, Q=8)
            vace_mask_latents = torch.nn.functional.interpolate(vace_mask_latents, size=((vace_mask_latents.shape[2] + 3) // 4, vace_mask_latents.shape[3], vace_mask_latents.shape[4]), mode='nearest-exact')
            
            if vace_reference_image is None:
                pass
            else:
                if not isinstance(vace_reference_image,list):
                    vace_reference_image = [vace_reference_image]

                vace_reference_image = pipe.preprocess_video(vace_reference_image)

                bs, c, f, h, w = vace_reference_image.shape
                new_vace_ref_images = []
                for j in range(f):
                    new_vace_ref_images.append(vace_reference_image[0, :, j:j+1])
                vace_reference_image = new_vace_ref_images
                
                vace_reference_latents = pipe.vae.encode(vace_reference_image, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
                vace_reference_latents = torch.concat((vace_reference_latents, torch.zeros_like(vace_reference_latents)), dim=1)
                vace_reference_latents = [u.unsqueeze(0) for u in vace_reference_latents]

                vace_video_latents = torch.concat((*vace_reference_latents, vace_video_latents), dim=2)
                vace_mask_latents = torch.concat((torch.zeros_like(vace_mask_latents[:, :, :f]), vace_mask_latents), dim=2)
            
            vace_context = torch.concat((vace_video_latents, vace_mask_latents), dim=1)
            return {"vace_context": vace_context, "vace_scale": vace_scale}
        else:
            return {"vace_context": None, "vace_scale": vace_scale}


class WanVideoUnit_VAP(PipelineUnit):
    def __init__(self):
        super().__init__(
            take_over=True,
            onload_model_names=("text_encoder", "vae", "image_encoder"),
            input_params=("vap_video", "vap_prompt", "negative_vap_prompt", "end_image", "num_frames", "height", "width", "tiled", "tile_size", "tile_stride"),
            output_params=("vap_clip_feature", "vap_hidden_state", "context_vap")
        )
        
    def encode_prompt(self, pipe: WanVideoPipeline, prompt):
        ids, mask = pipe.tokenizer(prompt, return_mask=True, add_special_tokens=True)
        ids = ids.to(pipe.device)
        mask = mask.to(pipe.device)
        seq_lens = mask.gt(0).sum(dim=1).long()
        prompt_emb = pipe.text_encoder(ids, mask)
        for i, v in enumerate(seq_lens):
            prompt_emb[:, v:] = 0
        return prompt_emb

    def process(self, pipe: WanVideoPipeline, inputs_shared, inputs_posi, inputs_nega):
        if inputs_shared.get("vap_video") is None:
            return inputs_shared, inputs_posi, inputs_nega
        else:
            # 1. encode vap prompt
            pipe.load_models_to_device(["text_encoder"])
            vap_prompt, negative_vap_prompt = inputs_posi.get("vap_prompt", ""), inputs_nega.get("negative_vap_prompt", "")
            vap_prompt_emb = self.encode_prompt(pipe, vap_prompt)
            negative_vap_prompt_emb = self.encode_prompt(pipe, negative_vap_prompt)
            inputs_posi.update({"context_vap":vap_prompt_emb})
            inputs_nega.update({"context_vap":negative_vap_prompt_emb})
            # 2. prepare vap image clip embedding
            pipe.load_models_to_device(["vae", "image_encoder"])
            vap_video, end_image = inputs_shared.get("vap_video"), inputs_shared.get("end_image")

            num_frames, height, width = inputs_shared.get("num_frames"),inputs_shared.get("height"), inputs_shared.get("width")
            
            image_vap = pipe.preprocess_image(vap_video[0].resize((width, height))).to(pipe.device)

            vap_clip_context = pipe.image_encoder.encode_image([image_vap])
            if end_image is not None:
                vap_end_image = pipe.preprocess_image(vap_video[-1].resize((width, height))).to(pipe.device)
                if pipe.dit.has_image_pos_emb:
                    vap_clip_context = torch.concat([vap_clip_context, pipe.image_encoder.encode_image([vap_end_image])], dim=1)
            vap_clip_context = vap_clip_context.to(dtype=pipe.torch_dtype, device=pipe.device)
            inputs_shared.update({"vap_clip_feature":vap_clip_context})

            # 3. prepare vap latents            
            msk = torch.ones(1, num_frames, height//8, width//8, device=pipe.device)
            msk[:, 1:] = 0
            if end_image is not None:
                msk[:, -1:] = 1
                last_image_vap = pipe.preprocess_image(vap_video[-1].resize((width, height))).to(pipe.device)
                vae_input = torch.concat([image_vap.transpose(0,1), torch.zeros(3, num_frames-2, height, width).to(image_vap.device), last_image_vap.transpose(0,1)],dim=1)
            else:
                vae_input = torch.concat([image_vap.transpose(0, 1), torch.zeros(3, num_frames-1, height, width).to(image_vap.device)], dim=1)
            
            msk = torch.concat([torch.repeat_interleave(msk[:, 0:1], repeats=4, dim=1), msk[:, 1:]], dim=1)
            msk = msk.view(1, msk.shape[1] // 4, 4, height//8, width//8)
            msk = msk.transpose(1, 2)[0]

            tiled,tile_size,tile_stride = inputs_shared.get("tiled"), inputs_shared.get("tile_size"), inputs_shared.get("tile_stride")

            y = pipe.vae.encode([vae_input.to(dtype=pipe.torch_dtype, device=pipe.device)], device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)[0]
            y = y.to(dtype=pipe.torch_dtype, device=pipe.device)
            y = torch.concat([msk, y])
            y = y.unsqueeze(0)
            y = y.to(dtype=pipe.torch_dtype, device=pipe.device)

            vap_video = pipe.preprocess_video(vap_video)
            vap_latent = pipe.vae.encode(vap_video, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)

            vap_latent = torch.concat([vap_latent,y], dim=1).to(dtype=pipe.torch_dtype, device=pipe.device)
            inputs_shared.update({"vap_hidden_state":vap_latent})

            return inputs_shared, inputs_posi, inputs_nega



class WanVideoUnit_UnifiedSequenceParallel(PipelineUnit):
    def __init__(self):
        super().__init__(input_params=(), output_params=("use_unified_sequence_parallel",))

    def process(self, pipe: WanVideoPipeline):
        if hasattr(pipe, "use_unified_sequence_parallel"):
            if pipe.use_unified_sequence_parallel:
                return {"use_unified_sequence_parallel": True}
        return {}



class WanVideoUnit_TeaCache(PipelineUnit):
    def __init__(self):
        super().__init__(
            seperate_cfg=True,
            input_params_posi={"num_inference_steps": "num_inference_steps", "tea_cache_l1_thresh": "tea_cache_l1_thresh", "tea_cache_model_id": "tea_cache_model_id"},
            input_params_nega={"num_inference_steps": "num_inference_steps", "tea_cache_l1_thresh": "tea_cache_l1_thresh", "tea_cache_model_id": "tea_cache_model_id"},
            output_params=("tea_cache",)
        )

    def process(self, pipe: WanVideoPipeline, num_inference_steps, tea_cache_l1_thresh, tea_cache_model_id):
        if tea_cache_l1_thresh is None:
            return {}
        return {"tea_cache": TeaCache(num_inference_steps, rel_l1_thresh=tea_cache_l1_thresh, model_id=tea_cache_model_id)}



class WanVideoUnit_CfgMerger(PipelineUnit):
    def __init__(self):
        super().__init__(take_over=True)
        self.concat_tensor_names = ["context", "clip_feature", "y", "reference_latents"]

    def process(self, pipe: WanVideoPipeline, inputs_shared, inputs_posi, inputs_nega):
        if not inputs_shared["cfg_merge"]:
            return inputs_shared, inputs_posi, inputs_nega
        for name in self.concat_tensor_names:
            tensor_posi = inputs_posi.get(name)
            tensor_nega = inputs_nega.get(name)
            tensor_shared = inputs_shared.get(name)
            if tensor_posi is not None and tensor_nega is not None:
                inputs_shared[name] = torch.concat((tensor_posi, tensor_nega), dim=0)
            elif tensor_shared is not None:
                inputs_shared[name] = torch.concat((tensor_shared, tensor_shared), dim=0)
        inputs_posi.clear()
        inputs_nega.clear()
        return inputs_shared, inputs_posi, inputs_nega


class WanVideoUnit_S2V(PipelineUnit):
    def __init__(self):
        super().__init__(
            take_over=True,
            onload_model_names=("audio_encoder", "vae",),
            input_params=("input_audio", "audio_embeds", "num_frames", "height", "width", "tiled", "tile_size", "tile_stride", "audio_sample_rate", "s2v_pose_video", "s2v_pose_latents", "motion_video"),
            output_params=("audio_embeds", "motion_latents", "drop_motion_frames", "s2v_pose_latents"),
        )

    def process_audio(self, pipe: WanVideoPipeline, input_audio, audio_sample_rate, num_frames, fps=16, audio_embeds=None, return_all=False):
        if audio_embeds is not None:
            return {"audio_embeds": audio_embeds}
        pipe.load_models_to_device(["audio_encoder"])
        audio_embeds = pipe.audio_encoder.get_audio_feats_per_inference(input_audio, audio_sample_rate, pipe.audio_processor, fps=fps, batch_frames=num_frames-1, dtype=pipe.torch_dtype, device=pipe.device)
        if return_all:
            return audio_embeds
        else:
            return {"audio_embeds": audio_embeds[0]}

    def process_motion_latents(self, pipe: WanVideoPipeline, height, width, tiled, tile_size, tile_stride, motion_video=None):
        pipe.load_models_to_device(["vae"])
        motion_frames = 73
        kwargs = {}
        if motion_video is not None:
            assert motion_video.shape[2] == motion_frames, f"motion video must have {motion_frames} frames, but got {motion_video.shape[2]}"
            motion_latents = motion_video
            kwargs["drop_motion_frames"] = False
        else:
            motion_latents = torch.zeros([1, 3, motion_frames, height, width], dtype=pipe.torch_dtype, device=pipe.device)
            kwargs["drop_motion_frames"] = True
        motion_latents = pipe.vae.encode(motion_latents, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
        kwargs.update({"motion_latents": motion_latents})
        return kwargs

    def process_pose_cond(self, pipe: WanVideoPipeline, s2v_pose_video, num_frames, height, width, tiled, tile_size, tile_stride, s2v_pose_latents=None, num_repeats=1, return_all=False):
        if s2v_pose_latents is not None:
            return {"s2v_pose_latents": s2v_pose_latents}
        if s2v_pose_video is None:
            return {"s2v_pose_latents": None}
        pipe.load_models_to_device(["vae"])
        infer_frames = num_frames - 1
        input_video = pipe.preprocess_video(s2v_pose_video)[:, :, :infer_frames * num_repeats]
        # pad if not enough frames
        padding_frames = infer_frames * num_repeats - input_video.shape[2]
        input_video = torch.cat([input_video, -torch.ones(1, 3, padding_frames, height, width, device=input_video.device, dtype=input_video.dtype)], dim=2)
        input_videos = input_video.chunk(num_repeats, dim=2)
        pose_conds = []
        for r in range(num_repeats):
            cond = input_videos[r]
            cond = torch.cat([cond[:, :, 0:1].repeat(1, 1, 1, 1, 1), cond], dim=2)
            cond_latents = pipe.vae.encode(cond, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
            pose_conds.append(cond_latents[:,:,1:])
        if return_all:
            return pose_conds
        else:
            return {"s2v_pose_latents": pose_conds[0]}

    def process(self, pipe: WanVideoPipeline, inputs_shared, inputs_posi, inputs_nega):
        if (inputs_shared.get("input_audio") is None and inputs_shared.get("audio_embeds") is None) or pipe.audio_encoder is None or pipe.audio_processor is None:
            return inputs_shared, inputs_posi, inputs_nega
        num_frames, height, width, tiled, tile_size, tile_stride = inputs_shared.get("num_frames"), inputs_shared.get("height"), inputs_shared.get("width"), inputs_shared.get("tiled"), inputs_shared.get("tile_size"), inputs_shared.get("tile_stride")
        input_audio, audio_embeds, audio_sample_rate = inputs_shared.pop("input_audio", None), inputs_shared.pop("audio_embeds", None), inputs_shared.get("audio_sample_rate", 16000)
        s2v_pose_video, s2v_pose_latents, motion_video = inputs_shared.pop("s2v_pose_video", None), inputs_shared.pop("s2v_pose_latents", None), inputs_shared.pop("motion_video", None)

        audio_input_positive = self.process_audio(pipe, input_audio, audio_sample_rate, num_frames, audio_embeds=audio_embeds)
        inputs_posi.update(audio_input_positive)
        inputs_nega.update({"audio_embeds": 0.0 * audio_input_positive["audio_embeds"]})

        inputs_shared.update(self.process_motion_latents(pipe, height, width, tiled, tile_size, tile_stride, motion_video))
        inputs_shared.update(self.process_pose_cond(pipe, s2v_pose_video, num_frames, height, width, tiled, tile_size, tile_stride, s2v_pose_latents=s2v_pose_latents))
        return inputs_shared, inputs_posi, inputs_nega

    @staticmethod
    def pre_calculate_audio_pose(pipe: WanVideoPipeline, input_audio=None, audio_sample_rate=16000, s2v_pose_video=None, num_frames=81, height=448, width=832, fps=16, tiled=True, tile_size=(30, 52), tile_stride=(15, 26)):
        assert pipe.audio_encoder is not None and pipe.audio_processor is not None, "Please load audio encoder and audio processor first."
        shapes = WanVideoUnit_ShapeChecker().process(pipe, height, width, num_frames)
        height, width, num_frames = shapes["height"], shapes["width"], shapes["num_frames"]
        unit = WanVideoUnit_S2V()
        audio_embeds = unit.process_audio(pipe, input_audio, audio_sample_rate, num_frames, fps, return_all=True)
        pose_latents = unit.process_pose_cond(pipe, s2v_pose_video, num_frames, height, width, num_repeats=len(audio_embeds), return_all=True, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)
        pose_latents = None if s2v_pose_video is None else pose_latents
        return audio_embeds, pose_latents, len(audio_embeds)


class WanVideoPostUnit_S2V(PipelineUnit):
    def __init__(self):
        super().__init__(input_params=("latents", "motion_latents", "drop_motion_frames"))

    def process(self, pipe: WanVideoPipeline, latents, motion_latents, drop_motion_frames):
        if pipe.audio_encoder is None or motion_latents is None or drop_motion_frames:
            return {}
        latents = torch.cat([motion_latents, latents[:,:,1:]], dim=2)
        return {"latents": latents}


class WanVideoUnit_AnimateVideoSplit(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("input_video", "animate_pose_video", "animate_face_video", "animate_inpaint_video", "animate_mask_video"),
            output_params=("animate_pose_video", "animate_face_video", "animate_inpaint_video", "animate_mask_video")
        )

    def process(self, pipe: WanVideoPipeline, input_video, animate_pose_video, animate_face_video, animate_inpaint_video, animate_mask_video):
        if input_video is None:
            return {}
        if animate_pose_video is not None:
            animate_pose_video = animate_pose_video[:len(input_video) - 4]
        if animate_face_video is not None:
            animate_face_video = animate_face_video[:len(input_video) - 4]
        if animate_inpaint_video is not None:
            animate_inpaint_video = animate_inpaint_video[:len(input_video) - 4]
        if animate_mask_video is not None:
            animate_mask_video = animate_mask_video[:len(input_video) - 4]
        return {"animate_pose_video": animate_pose_video, "animate_face_video": animate_face_video, "animate_inpaint_video": animate_inpaint_video, "animate_mask_video": animate_mask_video}


class WanVideoUnit_AnimatePoseLatents(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("animate_pose_video", "tiled", "tile_size", "tile_stride"),
            output_params=("pose_latents",),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, animate_pose_video, tiled, tile_size, tile_stride):
        if animate_pose_video is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        animate_pose_video = pipe.preprocess_video(animate_pose_video)
        pose_latents = pipe.vae.encode(animate_pose_video, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"pose_latents": pose_latents}


class WanVideoUnit_AnimateFacePixelValues(PipelineUnit):
    def __init__(self):
        super().__init__(
            take_over=True,
            input_params=("animate_face_video",),
            output_params=("face_pixel_values"),
        )

    def process(self, pipe: WanVideoPipeline, inputs_shared, inputs_posi, inputs_nega):
        if inputs_shared.get("animate_face_video", None) is None:
            return inputs_shared, inputs_posi, inputs_nega
        inputs_posi["face_pixel_values"] = pipe.preprocess_video(inputs_shared["animate_face_video"])
        inputs_nega["face_pixel_values"] = torch.zeros_like(inputs_posi["face_pixel_values"]) - 1
        return inputs_shared, inputs_posi, inputs_nega


class WanVideoUnit_AnimateInpaint(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("animate_inpaint_video", "animate_mask_video", "input_image", "tiled", "tile_size", "tile_stride"),
            output_params=("y",),
            onload_model_names=("vae",)
        )
        
    def get_i2v_mask(self, lat_t, lat_h, lat_w, mask_len=1, mask_pixel_values=None, device=get_device_type()):
        if mask_pixel_values is None:
            msk = torch.zeros(1, (lat_t-1) * 4 + 1, lat_h, lat_w, device=device)
        else:
            msk = mask_pixel_values.clone()
        msk[:, :mask_len] = 1
        msk = torch.concat([torch.repeat_interleave(msk[:, 0:1], repeats=4, dim=1), msk[:, 1:]], dim=1)
        msk = msk.view(1, msk.shape[1] // 4, 4, lat_h, lat_w)
        msk = msk.transpose(1, 2)[0]
        return msk

    def process(self, pipe: WanVideoPipeline, animate_inpaint_video, animate_mask_video, input_image, tiled, tile_size, tile_stride):
        if animate_inpaint_video is None or animate_mask_video is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)

        bg_pixel_values = pipe.preprocess_video(animate_inpaint_video)
        y_reft = pipe.vae.encode(bg_pixel_values, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride)[0].to(dtype=pipe.torch_dtype, device=pipe.device)
        _, lat_t, lat_h, lat_w = y_reft.shape
        
        ref_pixel_values = pipe.preprocess_video([input_image])
        ref_latents = pipe.vae.encode(ref_pixel_values, device=pipe.device, tiled=tiled, tile_size=tile_size, tile_stride=tile_stride).to(dtype=pipe.torch_dtype, device=pipe.device)
        mask_ref = self.get_i2v_mask(1, lat_h, lat_w, 1, device=pipe.device)
        y_ref = torch.concat([mask_ref, ref_latents[0]]).to(dtype=torch.bfloat16, device=pipe.device)
        
        mask_pixel_values = 1 - pipe.preprocess_video(animate_mask_video, max_value=1, min_value=0)
        mask_pixel_values = rearrange(mask_pixel_values, "b c t h w -> (b t) c h w")
        mask_pixel_values = torch.nn.functional.interpolate(mask_pixel_values, size=(lat_h, lat_w), mode='nearest')
        mask_pixel_values = rearrange(mask_pixel_values, "(b t) c h w -> b t c h w", b=1)[:,:,0]
        msk_reft = self.get_i2v_mask(lat_t, lat_h, lat_w, 0, mask_pixel_values=mask_pixel_values, device=pipe.device)
        
        y_reft = torch.concat([msk_reft, y_reft]).to(dtype=torch.bfloat16, device=pipe.device)
        y = torch.concat([y_ref, y_reft], dim=1).unsqueeze(0)
        return {"y": y}


class WanVideoUnit_LongCatVideo(PipelineUnit):
    def __init__(self):
        super().__init__(
            input_params=("longcat_video",),
            output_params=("longcat_latents",),
            onload_model_names=("vae",)
        )

    def process(self, pipe: WanVideoPipeline, longcat_video):
        if longcat_video is None:
            return {}
        pipe.load_models_to_device(self.onload_model_names)
        longcat_video = pipe.preprocess_video(longcat_video)
        longcat_latents = pipe.vae.encode(longcat_video, device=pipe.device).to(dtype=pipe.torch_dtype, device=pipe.device)
        return {"longcat_latents": longcat_latents}


class TeaCache:
    def __init__(self, num_inference_steps, rel_l1_thresh, model_id):
        self.num_inference_steps = num_inference_steps
        self.step = 0
        self.accumulated_rel_l1_distance = 0
        self.previous_modulated_input = None
        self.rel_l1_thresh = rel_l1_thresh
        self.previous_residual = None
        self.previous_hidden_states = None
        
        self.coefficients_dict = {
            "Wan2.1-T2V-1.3B": [-5.21862437e+04, 9.23041404e+03, -5.28275948e+02, 1.36987616e+01, -4.99875664e-02],
            "Wan2.1-T2V-14B": [-3.03318725e+05, 4.90537029e+04, -2.65530556e+03, 5.87365115e+01, -3.15583525e-01],
            "Wan2.1-I2V-14B-480P": [2.57151496e+05, -3.54229917e+04,  1.40286849e+03, -1.35890334e+01, 1.32517977e-01],
            "Wan2.1-I2V-14B-720P": [ 8.10705460e+03,  2.13393892e+03, -3.72934672e+02,  1.66203073e+01, -4.17769401e-02],
        }
        if model_id not in self.coefficients_dict:
            supported_model_ids = ", ".join([i for i in self.coefficients_dict])
            raise ValueError(f"{model_id} is not a supported TeaCache model id. Please choose a valid model id in ({supported_model_ids}).")
        self.coefficients = self.coefficients_dict[model_id]

    def check(self, dit: WanModel, x, t_mod):
        modulated_inp = t_mod.clone()
        if self.step == 0 or self.step == self.num_inference_steps - 1:
            should_calc = True
            self.accumulated_rel_l1_distance = 0
        else:
            coefficients = self.coefficients
            rescale_func = np.poly1d(coefficients)
            self.accumulated_rel_l1_distance += rescale_func(((modulated_inp-self.previous_modulated_input).abs().mean() / self.previous_modulated_input.abs().mean()).cpu().item())
            if self.accumulated_rel_l1_distance < self.rel_l1_thresh:
                should_calc = False
            else:
                should_calc = True
                self.accumulated_rel_l1_distance = 0
        self.previous_modulated_input = modulated_inp
        self.step += 1
        if self.step == self.num_inference_steps:
            self.step = 0
        if should_calc:
            self.previous_hidden_states = x.clone()
        return not should_calc

    def store(self, hidden_states):
        self.previous_residual = hidden_states - self.previous_hidden_states
        self.previous_hidden_states = None

    def update(self, hidden_states):
        hidden_states = hidden_states + self.previous_residual
        return hidden_states



class TemporalTiler_BCTHW:
    def __init__(self):
        pass

    def build_1d_mask(self, length, left_bound, right_bound, border_width):
        x = torch.ones((length,))
        if border_width == 0:
            return x
        
        shift = 0.5
        if not left_bound:
            x[:border_width] = (torch.arange(border_width) + shift) / border_width
        if not right_bound:
            x[-border_width:] = torch.flip((torch.arange(border_width) + shift) / border_width, dims=(0,))
        return x

    def build_mask(self, data, is_bound, border_width):
        _, _, T, _, _ = data.shape
        t = self.build_1d_mask(T, is_bound[0], is_bound[1], border_width[0])
        mask = repeat(t, "T -> 1 1 T 1 1")
        return mask
    
    def run(self, model_fn, sliding_window_size, sliding_window_stride, computation_device, computation_dtype, model_kwargs, tensor_names, batch_size=None):
        tensor_names = [tensor_name for tensor_name in tensor_names if model_kwargs.get(tensor_name) is not None]
        tensor_dict = {tensor_name: model_kwargs[tensor_name] for tensor_name in tensor_names}
        B, C, T, H, W = tensor_dict[tensor_names[0]].shape
        if batch_size is not None:
            B *= batch_size
        data_device, data_dtype = tensor_dict[tensor_names[0]].device, tensor_dict[tensor_names[0]].dtype
        value = torch.zeros((B, C, T, H, W), device=data_device, dtype=data_dtype)
        weight = torch.zeros((1, 1, T, 1, 1), device=data_device, dtype=data_dtype)
        for t in range(0, T, sliding_window_stride):
            if t - sliding_window_stride >= 0 and t - sliding_window_stride + sliding_window_size >= T:
                continue
            t_ = min(t + sliding_window_size, T)
            model_kwargs.update({
                tensor_name: tensor_dict[tensor_name][:, :, t: t_:, :].to(device=computation_device, dtype=computation_dtype) \
                    for tensor_name in tensor_names
            })
            model_output = model_fn(**model_kwargs).to(device=data_device, dtype=data_dtype)
            mask = self.build_mask(
                model_output,
                is_bound=(t == 0, t_ == T),
                border_width=(sliding_window_size - sliding_window_stride,)
            ).to(device=data_device, dtype=data_dtype)
            value[:, :, t: t_, :, :] += model_output * mask
            weight[:, :, t: t_, :, :] += mask
        value /= weight
        model_kwargs.update(tensor_dict)
        return value



def model_fn_wan_video(
    dit: WanModel,
    motion_controller: WanMotionControllerModel = None,
    vace: VaceWanModel = None,
    vap: MotWanModel = None,
    animate_adapter: WanAnimateAdapter = None,
    latents: torch.Tensor = None,
    timestep: torch.Tensor = None,
    context: torch.Tensor = None,
    clip_feature: Optional[torch.Tensor] = None,
    y: Optional[torch.Tensor] = None,
    reference_latents = None,
    vace_context = None,
    vace_scale = 1.0,
    audio_embeds: Optional[torch.Tensor] = None,
    motion_latents: Optional[torch.Tensor] = None,
    s2v_pose_latents: Optional[torch.Tensor] = None,
    vap_hidden_state = None,
    vap_clip_feature = None,
    context_vap = None,
    drop_motion_frames: bool = True,
    tea_cache: TeaCache = None,
    use_unified_sequence_parallel: bool = False,
    motion_bucket_id: Optional[torch.Tensor] = None,
    pose_latents=None,
    face_pixel_values=None,
    longcat_latents=None,
    sliding_window_size: Optional[int] = None,
    sliding_window_stride: Optional[int] = None,
    cfg_merge: bool = False,
    use_gradient_checkpointing: bool = False,
    use_gradient_checkpointing_offload: bool = False,
    control_camera_latents_input = None,
    fuse_vae_embedding_in_latents: bool = False,
    **kwargs,
):
    if sliding_window_size is not None and sliding_window_stride is not None:
        model_kwargs = dict(
            dit=dit,
            motion_controller=motion_controller,
            vace=vace,
            latents=latents,
            timestep=timestep,
            context=context,
            clip_feature=clip_feature,
            y=y,
            reference_latents=reference_latents,
            vace_context=vace_context,
            vace_scale=vace_scale,
            tea_cache=tea_cache,
            use_unified_sequence_parallel=use_unified_sequence_parallel,
            motion_bucket_id=motion_bucket_id,
        )
        return TemporalTiler_BCTHW().run(
            model_fn_wan_video,
            sliding_window_size, sliding_window_stride,
            latents.device, latents.dtype,
            model_kwargs=model_kwargs,
            tensor_names=["latents", "y"],
            batch_size=2 if cfg_merge else 1
        )
    # LongCat-Video
    if isinstance(dit, LongCatVideoTransformer3DModel):
        return model_fn_longcat_video(
            dit=dit,
            latents=latents,
            timestep=timestep,
            context=context,
            longcat_latents=longcat_latents,
            use_gradient_checkpointing=use_gradient_checkpointing,
            use_gradient_checkpointing_offload=use_gradient_checkpointing_offload,
        )
        
    # wan2.2 s2v
    if audio_embeds is not None:
        return model_fn_wans2v(
            dit=dit,
            latents=latents,
            timestep=timestep,
            context=context,
            audio_embeds=audio_embeds,
            motion_latents=motion_latents,
            s2v_pose_latents=s2v_pose_latents,
            drop_motion_frames=drop_motion_frames,
            use_gradient_checkpointing_offload=use_gradient_checkpointing_offload,
            use_gradient_checkpointing=use_gradient_checkpointing,
            use_unified_sequence_parallel=use_unified_sequence_parallel,
        )

    if use_unified_sequence_parallel:
        import torch.distributed as dist
        from xfuser.core.distributed import (get_sequence_parallel_rank,
                                            get_sequence_parallel_world_size,
                                            get_sp_group)

    # Timestep
    if dit.seperated_timestep and fuse_vae_embedding_in_latents:
        timestep = torch.concat([
            torch.zeros((1, latents.shape[3] * latents.shape[4] // 4), dtype=latents.dtype, device=latents.device),
            torch.ones((latents.shape[2] - 1, latents.shape[3] * latents.shape[4] // 4), dtype=latents.dtype, device=latents.device) * timestep
        ]).flatten()
        t = dit.time_embedding(sinusoidal_embedding_1d(dit.freq_dim, timestep).unsqueeze(0))
        if use_unified_sequence_parallel and dist.is_initialized() and dist.get_world_size() > 1:
            t_chunks = torch.chunk(t, get_sequence_parallel_world_size(), dim=1)
            t_chunks = [torch.nn.functional.pad(chunk, (0, 0, 0, t_chunks[0].shape[1]-chunk.shape[1]), value=0) for chunk in t_chunks]
            t = t_chunks[get_sequence_parallel_rank()]
        t_mod = dit.time_projection(t).unflatten(2, (6, dit.dim))
    else:
        t = dit.time_embedding(sinusoidal_embedding_1d(dit.freq_dim, timestep))
        t_mod = dit.time_projection(t).unflatten(1, (6, dit.dim))
    
    # Motion Controller
    if motion_bucket_id is not None and motion_controller is not None:
        t_mod = t_mod + motion_controller(motion_bucket_id).unflatten(1, (6, dit.dim))
    context = dit.text_embedding(context)

    x = latents
    # Merged cfg
    if x.shape[0] != context.shape[0]:
        x = torch.concat([x] * context.shape[0], dim=0)
    if timestep.shape[0] != context.shape[0]:
        timestep = torch.concat([timestep] * context.shape[0], dim=0)

    # Image Embedding
    if y is not None and dit.require_vae_embedding:
        x = torch.cat([x, y], dim=1)
    if clip_feature is not None and dit.require_clip_embedding:
        clip_embdding = dit.img_emb(clip_feature)
        context = torch.cat([clip_embdding, context], dim=1)
        
    # Camera control
    x = dit.patchify(x, control_camera_latents_input)
    
    # Animate
    if pose_latents is not None and face_pixel_values is not None:
        x, motion_vec = animate_adapter.after_patch_embedding(x, pose_latents, face_pixel_values)
    
    # Patchify
    f, h, w = x.shape[2:]
    x = rearrange(x, 'b c f h w -> b (f h w) c').contiguous()
    
    # Reference image
    if reference_latents is not None:
        if len(reference_latents.shape) == 5:
            reference_latents = reference_latents[:, :, 0]
        reference_latents = dit.ref_conv(reference_latents).flatten(2).transpose(1, 2)
        x = torch.concat([reference_latents, x], dim=1)
        f += 1
    
    freqs = torch.cat([
        dit.freqs[0][:f].view(f, 1, 1, -1).expand(f, h, w, -1),
        dit.freqs[1][:h].view(1, h, 1, -1).expand(f, h, w, -1),
        dit.freqs[2][:w].view(1, 1, w, -1).expand(f, h, w, -1)
    ], dim=-1).reshape(f * h * w, 1, -1).to(x.device)

    # VAP 
    if vap is not None:
        # hidden state
        x_vap = vap_hidden_state
        x_vap = vap.patchify(x_vap)
        x_vap = rearrange(x_vap, 'b c f h w -> b (f h w) c').contiguous()
        # Timestep
        clean_timestep = torch.ones(timestep.shape, device=timestep.device).to(timestep.dtype)
        t = vap.time_embedding(sinusoidal_embedding_1d(vap.freq_dim, clean_timestep))
        t_mod_vap = vap.time_projection(t).unflatten(1, (6, vap.dim))

        # rope
        freqs_vap = vap.compute_freqs_mot(f,h,w).to(x.device)

        # context
        vap_clip_embedding = vap.img_emb(vap_clip_feature)
        context_vap = vap.text_embedding(context_vap)
        context_vap = torch.cat([vap_clip_embedding, context_vap], dim=1)
    
    # TeaCache
    if tea_cache is not None:
        tea_cache_update = tea_cache.check(dit, x, t_mod)
    else:
        tea_cache_update = False
        
    if vace_context is not None:
        vace_hints = vace(
            x, vace_context, context, t_mod, freqs,
            use_gradient_checkpointing=use_gradient_checkpointing,
            use_gradient_checkpointing_offload=use_gradient_checkpointing_offload
        )
    
    # blocks
    if use_unified_sequence_parallel:
        if dist.is_initialized() and dist.get_world_size() > 1:
            chunks = torch.chunk(x, get_sequence_parallel_world_size(), dim=1)
            pad_shape = chunks[0].shape[1] - chunks[-1].shape[1]
            chunks = [torch.nn.functional.pad(chunk, (0, 0, 0, chunks[0].shape[1]-chunk.shape[1]), value=0) for chunk in chunks]
            x = chunks[get_sequence_parallel_rank()]
    if tea_cache_update:
        x = tea_cache.update(x)
    else:
        def create_custom_forward(module):
            def custom_forward(*inputs):
                return module(*inputs)
            return custom_forward
        
        def create_custom_forward_vap(block, vap):
            def custom_forward(*inputs):
                return vap(block, *inputs)
            return custom_forward
        
        for block_id, block in enumerate(dit.blocks):
            # Block
            if vap is not None and block_id in vap.mot_layers_mapping:
                if use_gradient_checkpointing_offload:
                    with torch.autograd.graph.save_on_cpu():
                        x, x_vap = torch.utils.checkpoint.checkpoint(
                            create_custom_forward_vap(block, vap),
                            x, context, t_mod, freqs, x_vap, context_vap, t_mod_vap, freqs_vap, block_id,
                            use_reentrant=False,
                        )
                elif use_gradient_checkpointing:
                    x, x_vap = torch.utils.checkpoint.checkpoint(
                        create_custom_forward_vap(block, vap),
                        x, context, t_mod, freqs, x_vap, context_vap, t_mod_vap, freqs_vap, block_id,
                        use_reentrant=False,
                    )
                else:
                    x, x_vap = vap(block, x, context, t_mod, freqs, x_vap, context_vap, t_mod_vap, freqs_vap, block_id)
            else:
                if use_gradient_checkpointing_offload:
                    with torch.autograd.graph.save_on_cpu():
                        x = torch.utils.checkpoint.checkpoint(
                            create_custom_forward(block),
                            x, context, t_mod, freqs,
                            use_reentrant=False,
                        )
                elif use_gradient_checkpointing:
                    x = torch.utils.checkpoint.checkpoint(
                        create_custom_forward(block),
                        x, context, t_mod, freqs,
                        use_reentrant=False,
                    )
                else:
                    x = block(x, context, t_mod, freqs)
            
            # VACE
            if vace_context is not None and block_id in vace.vace_layers_mapping:
                current_vace_hint = vace_hints[vace.vace_layers_mapping[block_id]]
                if use_unified_sequence_parallel and dist.is_initialized() and dist.get_world_size() > 1:
                    current_vace_hint = torch.chunk(current_vace_hint, get_sequence_parallel_world_size(), dim=1)[get_sequence_parallel_rank()]
                    current_vace_hint = torch.nn.functional.pad(current_vace_hint, (0, 0, 0, chunks[0].shape[1] - current_vace_hint.shape[1]), value=0)
                x = x + current_vace_hint * vace_scale
            
            # Animate
            if pose_latents is not None and face_pixel_values is not None:
                x = animate_adapter.after_transformer_block(block_id, x, motion_vec)
        if tea_cache is not None:
            tea_cache.store(x)

    '''
    The all_gather interface in xDit utilizes torch’s all_gather_into_tensor interface. As of the torch 2.9 release version, this interface still does not provide a backward method and cannot support automatic autograd. The commit in the torch community (https://github.com/pytorch/pytorch/pull/168140) has not yet been merged. Therefore, a simple replacement of all_gather_into_tensor in xdit with torch.distributed.nn.functional.all_gather is applied here to enable autograd support.

        def all_reduce(self, input_: torch.Tensor, op=torch._C._distributed_c10d.ReduceOp.SUM) -> torch.Tensor:
            ...
            # All-gather.
            # torch.distributed.all_gather_into_tensor(
            #     output_tensor, input_, group=self.device_group
            # )
            gathered_list = torch.distributed.nn.functional.all_gather(input_, group=self.device_group)
            output_tensor = torch.cat(gathered_list, dim=0)
            ...
    '''
    x = dit.head(x, t)
    if use_unified_sequence_parallel:
        if dist.is_initialized() and dist.get_world_size() > 1:
            x = get_sp_group().all_gather(x, dim=1)
            x = x[:, :-pad_shape] if pad_shape > 0 else x
    # Remove reference latents
    if reference_latents is not None:
        x = x[:, reference_latents.shape[1]:]
        f -= 1
    x = dit.unpatchify(x, (f, h, w))
    return x


def model_fn_longcat_video(
    dit: LongCatVideoTransformer3DModel,
    latents: torch.Tensor = None,
    timestep: torch.Tensor = None,
    context: torch.Tensor = None,
    longcat_latents: torch.Tensor = None,
    use_gradient_checkpointing=False,
    use_gradient_checkpointing_offload=False,
):
    if longcat_latents is not None:
        latents[:, :, :longcat_latents.shape[2]] = longcat_latents
        num_cond_latents = longcat_latents.shape[2]
    else:
        num_cond_latents = 0
    context = context.unsqueeze(0)
    encoder_attention_mask = torch.any(context != 0, dim=-1)[:, 0].to(torch.int64)
    output = dit(
        latents,
        timestep,
        context,
        encoder_attention_mask,
        num_cond_latents=num_cond_latents,
        use_gradient_checkpointing=use_gradient_checkpointing,
        use_gradient_checkpointing_offload=use_gradient_checkpointing_offload,
    )
    output = -output
    output = output.to(latents.dtype)
    return output


def model_fn_wans2v(
    dit,
    latents,
    timestep,
    context,
    audio_embeds,
    motion_latents,
    s2v_pose_latents,
    drop_motion_frames=True,
    use_gradient_checkpointing_offload=False,
    use_gradient_checkpointing=False,
    use_unified_sequence_parallel=False,
):
    if use_unified_sequence_parallel:
        import torch.distributed as dist
        from xfuser.core.distributed import (get_sequence_parallel_rank,
                                            get_sequence_parallel_world_size,
                                            get_sp_group)
    origin_ref_latents = latents[:, :, 0:1]
    x = latents[:, :, 1:]

    # context embedding
    context = dit.text_embedding(context)

    # audio encode
    audio_emb_global, merged_audio_emb = dit.cal_audio_emb(audio_embeds)

    # x and s2v_pose_latents
    s2v_pose_latents = torch.zeros_like(x) if s2v_pose_latents is None else s2v_pose_latents
    x, (f, h, w) = dit.patchify(dit.patch_embedding(x) + dit.cond_encoder(s2v_pose_latents))
    seq_len_x = seq_len_x_global = x.shape[1] # global used for unified sequence parallel

    # reference image
    ref_latents, (rf, rh, rw) = dit.patchify(dit.patch_embedding(origin_ref_latents))
    grid_sizes = dit.get_grid_sizes((f, h, w), (rf, rh, rw))
    x = torch.cat([x, ref_latents], dim=1)
    # mask
    mask = torch.cat([torch.zeros([1, seq_len_x]), torch.ones([1, ref_latents.shape[1]])], dim=1).to(torch.long).to(x.device)
    # freqs
    pre_compute_freqs = rope_precompute(x.detach().view(1, x.size(1), dit.num_heads, dit.dim // dit.num_heads), grid_sizes, dit.freqs, start=None)
    # motion
    x, pre_compute_freqs, mask = dit.inject_motion(x, pre_compute_freqs, mask, motion_latents, drop_motion_frames=drop_motion_frames, add_last_motion=2)

    x = x + dit.trainable_cond_mask(mask).to(x.dtype)

    # tmod
    timestep = torch.cat([timestep, torch.zeros([1], dtype=timestep.dtype, device=timestep.device)])
    t = dit.time_embedding(sinusoidal_embedding_1d(dit.freq_dim, timestep))
    t_mod = dit.time_projection(t).unflatten(1, (6, dit.dim)).unsqueeze(2).transpose(0, 2)

    if use_unified_sequence_parallel and dist.is_initialized() and dist.get_world_size() > 1:
        world_size, sp_rank = get_sequence_parallel_world_size(), get_sequence_parallel_rank()
        assert x.shape[1] % world_size == 0, f"the dimension after chunk must be divisible by world size, but got {x.shape[1]} and {get_sequence_parallel_world_size()}"
        x = torch.chunk(x, world_size, dim=1)[sp_rank]
        seg_idxs = [0] + list(torch.cumsum(torch.tensor([x.shape[1]] * world_size), dim=0).cpu().numpy())
        seq_len_x_list = [min(max(0, seq_len_x - seg_idxs[i]), x.shape[1]) for i in range(len(seg_idxs)-1)]
        seq_len_x = seq_len_x_list[sp_rank]

    def create_custom_forward(module):
        def custom_forward(*inputs):
            return module(*inputs)
        return custom_forward

    for block_id, block in enumerate(dit.blocks):
        if use_gradient_checkpointing_offload:
            with torch.autograd.graph.save_on_cpu():
                x = torch.utils.checkpoint.checkpoint(
                    create_custom_forward(block),
                    x, context, t_mod, seq_len_x, pre_compute_freqs[0],
                    use_reentrant=False,
                )
                x = torch.utils.checkpoint.checkpoint(
                    create_custom_forward(lambda x: dit.after_transformer_block(block_id, x, audio_emb_global, merged_audio_emb, seq_len_x)),
                    x,
                    use_reentrant=False,
                )
        elif use_gradient_checkpointing:
            x = torch.utils.checkpoint.checkpoint(
                create_custom_forward(block),
                x, context, t_mod, seq_len_x, pre_compute_freqs[0],
                use_reentrant=False,
            )
            x = torch.utils.checkpoint.checkpoint(
                create_custom_forward(lambda x: dit.after_transformer_block(block_id, x, audio_emb_global, merged_audio_emb, seq_len_x)),
                x,
                use_reentrant=False,
            )
        else:
            x = block(x, context, t_mod, seq_len_x, pre_compute_freqs[0])
            x = dit.after_transformer_block(block_id, x, audio_emb_global, merged_audio_emb, seq_len_x_global, use_unified_sequence_parallel)

    if use_unified_sequence_parallel and dist.is_initialized() and dist.get_world_size() > 1:
        x = get_sp_group().all_gather(x, dim=1)

    x = x[:, :seq_len_x_global]
    x = dit.head(x, t[:-1])
    x = dit.unpatchify(x, (f, h, w))
    # make compatible with wan video
    x = torch.cat([origin_ref_latents, x], dim=2)
    return x