animatediff/pipelines/pipeline_animation.py

# Adapted from https://github.com/showlab/Tune-A-Video/blob/main/tuneavideo/pipelines/pipeline_tuneavideo.py

import inspect
from typing import Callable, List, Optional, Union
from dataclasses import dataclass

import PIL.Image
import numpy as np
import torch
from tqdm import tqdm

from diffusers.utils import is_accelerate_available
from packaging import version
from transformers import CLIPTextModel, CLIPTokenizer

from diffusers.configuration_utils import FrozenDict
from diffusers.models import AutoencoderKL
from diffusers import DiffusionPipeline
from diffusers.schedulers import (
    DDIMScheduler,
    DPMSolverMultistepScheduler,
    EulerAncestralDiscreteScheduler,
    EulerDiscreteScheduler,
    LMSDiscreteScheduler,
    PNDMScheduler,
)
from diffusers.utils import deprecate, logging, BaseOutput

from einops import rearrange

from ..models.unet import UNet3DConditionModel
from ..models.sparse_controlnet import SparseControlNetModel
import pdb
import PIL

logger = logging.get_logger(__name__)  # pylint: disable=invalid-name

# image: either PIL.Image.Image or torch.Tensor.
def preprocess_image(image, h=512, w=512):
    if isinstance(image, torch.Tensor):
        return image
    elif isinstance(image, PIL.Image.Image):
        # image: [1, 512, 512, 3]
        image = np.array(image.resize((w, h), resample=PIL.Image.LANCZOS))[None, :]
        image = image.astype(np.float16) * 2 / 255.0 - 1.0
        # image: [1, 3, 512, 512]
        image = image.transpose(0, 3, 1, 2)
        image = torch.from_numpy(image)
    else:
        breakpoint()
    return image

@dataclass
class AnimationPipelineOutput(BaseOutput):
    videos: Union[torch.Tensor, np.ndarray]


class AnimationPipeline(DiffusionPipeline):
    _optional_components = []

    def __init__(
        self,
        vae: AutoencoderKL,
        text_encoder: CLIPTextModel,
        tokenizer: CLIPTokenizer,
        unet: UNet3DConditionModel,
        scheduler: Union[
            DDIMScheduler,
            PNDMScheduler,
            LMSDiscreteScheduler,
            EulerDiscreteScheduler,
            EulerAncestralDiscreteScheduler,
            DPMSolverMultistepScheduler,
        ],
        controlnet: Union[SparseControlNetModel, None] = None,
        torch_dtype=torch.float32,
    ):
        super().__init__()

        if hasattr(scheduler.config, "steps_offset") and scheduler.config.steps_offset != 1:
            deprecation_message = (
                f"The configuration file of this scheduler: {scheduler} is outdated. `steps_offset`"
                f" should be set to 1 instead of {scheduler.config.steps_offset}. Please make sure "
                "to update the config accordingly as leaving `steps_offset` might led to incorrect results"
                " in future versions. If you have downloaded this checkpoint from the Hugging Face Hub,"
                " it would be very nice if you could open a Pull request for the `scheduler/scheduler_config.json`"
                " file"
            )
            deprecate("steps_offset!=1", "1.0.0", deprecation_message, standard_warn=False)
            new_config = dict(scheduler.config)
            new_config["steps_offset"] = 1
            scheduler._internal_dict = FrozenDict(new_config)

        if hasattr(scheduler.config, "clip_sample") and scheduler.config.clip_sample is True:
            deprecation_message = (
                f"The configuration file of this scheduler: {scheduler} has not set the configuration `clip_sample`."
                " `clip_sample` should be set to False in the configuration file. Please make sure to update the"
                " config accordingly as not setting `clip_sample` in the config might lead to incorrect results in"
                " future versions. If you have downloaded this checkpoint from the Hugging Face Hub, it would be very"
                " nice if you could open a Pull request for the `scheduler/scheduler_config.json` file"
            )
            deprecate("clip_sample not set", "1.0.0", deprecation_message, standard_warn=False)
            new_config = dict(scheduler.config)
            new_config["clip_sample"] = False
            scheduler._internal_dict = FrozenDict(new_config)

        is_unet_version_less_0_9_0 = hasattr(unet.config, "_diffusers_version") and version.parse(
            version.parse(unet.config._diffusers_version).base_version
        ) < version.parse("0.9.0.dev0")
        is_unet_sample_size_less_64 = hasattr(unet.config, "sample_size") and unet.config.sample_size < 64
        if is_unet_version_less_0_9_0 and is_unet_sample_size_less_64:
            deprecation_message = (
                "The configuration file of the unet has set the default `sample_size` to smaller than"
                " 64 which seems highly unlikely. If your checkpoint is a fine-tuned version of any of the"
                " following: \n- CompVis/stable-diffusion-v1-4 \n- CompVis/stable-diffusion-v1-3 \n-"
                " CompVis/stable-diffusion-v1-2 \n- CompVis/stable-diffusion-v1-1 \n- runwayml/stable-diffusion-v1-5"
                " \n- runwayml/stable-diffusion-inpainting \n you should change 'sample_size' to 64 in the"
                " configuration file. Please make sure to update the config accordingly as leaving `sample_size=32`"
                " in the config might lead to incorrect results in future versions. If you have downloaded this"
                " checkpoint from the Hugging Face Hub, it would be very nice if you could open a Pull request for"
                " the `unet/config.json` file"
            )
            deprecate("sample_size<64", "1.0.0", deprecation_message, standard_warn=False)
            new_config = dict(unet.config)
            new_config["sample_size"] = 64
            unet._internal_dict = FrozenDict(new_config)
        self.torch_dtype=torch_dtype
        self.register_modules(
            vae=vae.to(self.torch_dtype),
            text_encoder=text_encoder.to(self.torch_dtype),
            tokenizer=tokenizer,
            unet=unet.to(self.torch_dtype),
            scheduler=scheduler,
            # controlnet=controlnet.to(self.torch_dtype),
        )
        self.vae_scale_factor = 2 ** (len(self.vae.config.block_out_channels) - 1)
        if controlnet!=None: self.controlnet=controlnet.to(self.torch_dtype)
    def enable_vae_slicing(self):
        self.vae.enable_slicing()

    def disable_vae_slicing(self):
        self.vae.disable_slicing()

    def enable_sequential_cpu_offload(self, gpu_id=0):
        if is_accelerate_available():
            from accelerate import cpu_offload
        else:
            raise ImportError("Please install accelerate via `pip install accelerate`")

        device = torch.device(f"cuda:{gpu_id}")

        for cpu_offloaded_model in [self.unet, self.text_encoder, self.vae]:
            if cpu_offloaded_model is not None:
                cpu_offload(cpu_offloaded_model, device)


    @property
    def _execution_device(self):
        if self.device != torch.device("meta") or not hasattr(self.unet, "_hf_hook"):
            return self.device
        for module in self.unet.modules():
            if (
                hasattr(module, "_hf_hook")
                and hasattr(module._hf_hook, "execution_device")
                and module._hf_hook.execution_device is not None
            ):
                return torch.device(module._hf_hook.execution_device)
        return self.device

    def _encode_prompt(self, prompt, device, num_videos_per_prompt, do_classifier_free_guidance, negative_prompt):
        batch_size = len(prompt) if isinstance(prompt, list) else 1

        text_inputs = self.tokenizer(
            prompt,
            padding="max_length",
            max_length=self.tokenizer.model_max_length,
            truncation=True,
            return_tensors="pt",
        )
        text_input_ids = text_inputs.input_ids
        untruncated_ids = self.tokenizer(prompt, padding="longest", return_tensors="pt").input_ids

        if untruncated_ids.shape[-1] >= text_input_ids.shape[-1] and not torch.equal(text_input_ids, untruncated_ids):
            removed_text = self.tokenizer.batch_decode(untruncated_ids[:, self.tokenizer.model_max_length - 1 : -1])
            logger.warning(
                "The following part of your input was truncated because CLIP can only handle sequences up to"
                f" {self.tokenizer.model_max_length} tokens: {removed_text}"
            )

        if hasattr(self.text_encoder.config, "use_attention_mask") and self.text_encoder.config.use_attention_mask:
            attention_mask = text_inputs.attention_mask.to(device)
        else:
            attention_mask = None

        text_embeddings = self.text_encoder(
            text_input_ids.to(device),
            attention_mask=attention_mask,
        )
        text_embeddings = text_embeddings[0]

        # duplicate text embeddings for each generation per prompt, using mps friendly method
        bs_embed, seq_len, _ = text_embeddings.shape
        text_embeddings = text_embeddings.repeat(1, num_videos_per_prompt, 1)
        text_embeddings = text_embeddings.view(bs_embed * num_videos_per_prompt, seq_len, -1)

        # get unconditional embeddings for classifier free guidance
        if do_classifier_free_guidance:
            uncond_tokens: List[str]
            if negative_prompt is None:
                uncond_tokens = [""] * batch_size
            elif type(prompt) is not type(negative_prompt):
                raise TypeError(
                    f"`negative_prompt` should be the same type to `prompt`, but got {type(negative_prompt)} !="
                    f" {type(prompt)}."
                )
            elif isinstance(negative_prompt, str):
                uncond_tokens = [negative_prompt]
            elif batch_size != len(negative_prompt):
                raise ValueError(
                    f"`negative_prompt`: {negative_prompt} has batch size {len(negative_prompt)}, but `prompt`:"
                    f" {prompt} has batch size {batch_size}. Please make sure that passed `negative_prompt` matches"
                    " the batch size of `prompt`."
                )
            else:
                uncond_tokens = negative_prompt

            max_length = text_input_ids.shape[-1]
            uncond_input = self.tokenizer(
                uncond_tokens,
                padding="max_length",
                max_length=max_length,
                truncation=True,
                return_tensors="pt",
            )

            if hasattr(self.text_encoder.config, "use_attention_mask") and self.text_encoder.config.use_attention_mask:
                attention_mask = uncond_input.attention_mask.to(device)
            else:
                attention_mask = None

            uncond_embeddings = self.text_encoder(
                uncond_input.input_ids.to(device),
                attention_mask=attention_mask,
            )
            uncond_embeddings = uncond_embeddings[0]

            # duplicate unconditional embeddings for each generation per prompt, using mps friendly method
            seq_len = uncond_embeddings.shape[1]
            uncond_embeddings = uncond_embeddings.repeat(1, num_videos_per_prompt, 1)
            uncond_embeddings = uncond_embeddings.view(batch_size * num_videos_per_prompt, seq_len, -1)

            # For classifier free guidance, we need to do two forward passes.
            # Here we concatenate the unconditional and text embeddings into a single batch
            # to avoid doing two forward passes
            text_embeddings = torch.cat([uncond_embeddings, text_embeddings])

        return text_embeddings

    def encode_prompt(self, prompt, device, num_videos_per_prompt, do_classifier_free_guidance, negative_prompt):
        batch_size = len(prompt) if isinstance(prompt, list) else 1
        # print(batch_size)
        # exit()
        text_inputs = self.tokenizer(
            prompt,
            padding="max_length",
            max_length=self.tokenizer.model_max_length,
            truncation=True,
            return_tensors="pt",
        )
        text_input_ids = text_inputs.input_ids
        untruncated_ids = self.tokenizer(prompt, padding="longest", return_tensors="pt").input_ids

        if untruncated_ids.shape[-1] >= text_input_ids.shape[-1] and not torch.equal(text_input_ids, untruncated_ids):
            removed_text = self.tokenizer.batch_decode(untruncated_ids[:, self.tokenizer.model_max_length - 1 : -1])
            logger.warning(
                "The following part of your input was truncated because CLIP can only handle sequences up to"
                f" {self.tokenizer.model_max_length} tokens: {removed_text}"
            )

        if hasattr(self.text_encoder.config, "use_attention_mask") and self.text_encoder.config.use_attention_mask:
            attention_mask = text_inputs.attention_mask.to(device)
        else:
            attention_mask = None

        text_embeddings = self.text_encoder(
            text_input_ids.to(device),
            attention_mask=attention_mask,
        )
        text_embeddings = text_embeddings[0]

        # duplicate text embeddings for each generation per prompt, using mps friendly method
        bs_embed, seq_len, _ = text_embeddings.shape
        text_embeddings = text_embeddings.repeat(1, num_videos_per_prompt, 1)
        text_embeddings = text_embeddings.view(bs_embed * num_videos_per_prompt, seq_len, -1)

        # get unconditional embeddings for classifier free guidance
        if do_classifier_free_guidance:
            uncond_tokens: List[str]
            if negative_prompt is None:
                uncond_tokens = [""] * batch_size
            elif type(prompt) is not type(negative_prompt):
                raise TypeError(
                    f"`negative_prompt` should be the same type to `prompt`, but got {type(negative_prompt)} !="
                    f" {type(prompt)}."
                )
            elif isinstance(negative_prompt, str):
                uncond_tokens = [negative_prompt]
            elif batch_size != len(negative_prompt):
                raise ValueError(
                    f"`negative_prompt`: {negative_prompt} has batch size {len(negative_prompt)}, but `prompt`:"
                    f" {prompt} has batch size {batch_size}. Please make sure that passed `negative_prompt` matches"
                    " the batch size of `prompt`."
                )
            else:
                uncond_tokens = negative_prompt
            max_length = text_input_ids.shape[-1]
            uncond_input = self.tokenizer(
                uncond_tokens,
                padding="max_length",
                max_length=max_length,
                truncation=True,
                return_tensors="pt",
            )

            if hasattr(self.text_encoder.config, "use_attention_mask") and self.text_encoder.config.use_attention_mask:
                attention_mask = uncond_input.attention_mask.to(device)
            else:
                attention_mask = None

            uncond_embeddings = self.text_encoder(
                uncond_input.input_ids.to(device),
                attention_mask=attention_mask,
            )
            uncond_embeddings = uncond_embeddings[0]

            # duplicate unconditional embeddings for each generation per prompt, using mps friendly method
            seq_len = uncond_embeddings.shape[1]
            uncond_embeddings = uncond_embeddings.repeat(1, num_videos_per_prompt, 1)
            uncond_embeddings = uncond_embeddings.view(batch_size * num_videos_per_prompt, seq_len, -1)

            # For classifier free guidance, we need to do two forward passes.
            # Here we concatenate the unconditional and text embeddings into a single batch
            # to avoid doing two forward passes
            # text_embeddings = torch.cat([uncond_embeddings, text_embeddings])
        # print("encode here!!!")
        # print("shape of text_embeddings",text_embeddings.shape)
        # print("shape of uncond_embeddings",uncond_embeddings.shape)
        return text_embeddings,uncond_embeddings


    def decode_latents(self, latents):
        video_length = latents.shape[2]
        latents = 1 / 0.18215 * latents
        latents = rearrange(latents, "b c f h w -> (b f) c h w")
        # video = self.vae.decode(latents).sample
        video = []
        for frame_idx in range(latents.shape[0]):
            video.append(self.vae.decode(latents[frame_idx:frame_idx+1]).sample)
        video = torch.cat(video)
        video = rearrange(video, "(b f) c h w -> b c f h w", f=video_length)
        video = (video / 2 + 0.5).clamp(0, 1)
        # we always cast to float32 as this does not cause significant overhead and is compatible with bfloa16
        video = video.cpu().float().numpy()
        return video

    def prepare_extra_step_kwargs(self, generator, eta):
        # prepare extra kwargs for the scheduler step, since not all schedulers have the same signature
        # eta (η) is only used with the DDIMScheduler, it will be ignored for other schedulers.
        # eta corresponds to η in DDIM paper: https://arxiv.org/abs/2010.02502
        # and should be between [0, 1]

        accepts_eta = "eta" in set(inspect.signature(self.scheduler.step).parameters.keys())
        extra_step_kwargs = {}
        if accepts_eta:
            extra_step_kwargs["eta"] = eta

        # check if the scheduler accepts generator
        accepts_generator = "generator" in set(inspect.signature(self.scheduler.step).parameters.keys())
        if accepts_generator:
            extra_step_kwargs["generator"] = generator
        return extra_step_kwargs

    def check_inputs(self, prompt, height, width, callback_steps,prompt_embedding):
        if not isinstance(prompt, str) and not isinstance(prompt, list) and prompt_embedding==None:
            raise ValueError(f"`prompt` has to be of type `str` or `list` but is {type(prompt)}")

        if height % 8 != 0 or width % 8 != 0:
            raise ValueError(f"`height` and `width` have to be divisible by 8 but are {height} and {width}.")

        if (callback_steps is None) or (
            callback_steps is not None and (not isinstance(callback_steps, int) or callback_steps <= 0)
        ):
            raise ValueError(
                f"`callback_steps` has to be a positive integer but is {callback_steps} of type"
                f" {type(callback_steps)}."
            )

    def prepare_latents(self, init_image, init_image_strength, batch_size, num_channels_latents, video_length, height, width, dtype, device, generator, latents=None):
        shape = (batch_size, num_channels_latents, video_length, height // self.vae_scale_factor, width // self.vae_scale_factor)
        
        if init_image is not None:
            # init_image: either PIL.Image.Image or torch.Tensor.
            image = preprocess_image(init_image, height, width)
            image = image.to(device=device, dtype=dtype)
            if isinstance(generator, list):
                init_latents = [
                    self.vae.encode(image[i : i + 1]).latent_dist.sample(generator[i]) for i in range(batch_size)
                ]
                init_latents = torch.cat(init_latents, dim=0)
            else:
                init_latents = self.vae.encode(image).latent_dist.sample(generator)
        else:
            init_latents = None


        if isinstance(generator, list) and len(generator) != batch_size:
            raise ValueError(
                f"You have passed a list of generators of length {len(generator)}, but requested an effective batch"
                f" size of {batch_size}. Make sure the batch size matches the length of the generators."
            )
        if latents is None:
            rand_device = "cpu" if device.type == "mps" else device

            if isinstance(generator, list):
                shape = shape
                # shape = (1,) + shape[1:]
                # ignore init latents for batch model
                latents = [
                    torch.randn(shape, generator=generator[i], device=rand_device, dtype=dtype)
                    for i in range(batch_size)
                ]
                latents = torch.cat(latents, dim=0).to(device)
            else:
                latents = torch.randn(shape, generator=generator, device=rand_device, dtype=dtype).to(device)
                if init_latents is not None:
                    blend_frames = video_length // 2
                    init_image_strength, init_image_final_weight = init_image_strength
                    for i in range(video_length):
                        dist_to_end = (blend_frames - float(i)) / blend_frames
                        # When i > 0.9 * blend_frames, dist_to_end < 0.1. Then it will be changed to 0.05,
                        # so that the last half of the video still is still initialized with a little bit of init_latents.
                        dist_to_end = max(dist_to_end, init_image_final_weight)
                        # Changed from /30 to /100.
                        # gradully reduce init alpha along video frames (loosen restriction)
                        init_alpha = dist_to_end * init_image_strength / 100
                        latents[:, :, i, :, :] = init_latents * init_alpha + latents[:, :, i, :, :] * (1 - init_alpha)
        else:
            if latents.shape != shape:
                raise ValueError(f"Unexpected latents shape, got {latents.shape}, expected {shape}")
            latents = latents.to(device)

        # scale the initial noise by the standard deviation required by the scheduler
        if init_latents is None:
            latents = latents * self.scheduler.init_noise_sigma
        return latents

    @torch.no_grad()
    def __call__(
        self,
        prompt: Union[str, List[str]],
        video_length: Optional[int],
        init_image: Union[PIL.Image.Image, torch.Tensor],
        init_image_strength: float = 1.0,
        height: Optional[int] = None,
        width: Optional[int] = None,
        num_inference_steps: int = 50,
        guidance_scale: float = 7.5,
        negative_prompt: Optional[Union[str, List[str]]] = None,
        num_videos_per_prompt: Optional[int] = 1,
        eta: float = 0.0,
        generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None,
        latents: Optional[torch.FloatTensor] = None,
        output_type: Optional[str] = "tensor",
        return_dict: bool = True,
        callback: Optional[Callable[[int, int, torch.FloatTensor], None]] = None,
        callback_steps: Optional[int] = 1,
        #support embeddings
        prompt_embeds: Optional[torch.FloatTensor] = None,
        negative_prompt_embeds:Optional[torch.FloatTensor] = None,
        # support controlnet
        controlnet_images: torch.FloatTensor = None,
        controlnet_image_index: list = [0],
        controlnet_conditioning_scale: Union[float, List[float]] = 1.0,
        **kwargs,
    ):
        # Default height and width to unet
        height = height or self.unet.config.sample_size * self.vae_scale_factor
        width = width or self.unet.config.sample_size * self.vae_scale_factor

        if isinstance(prompt_embeds, (list, tuple)):
            prompt_embeds_begin, prompt_embeds_end, adaface_anneal_steps = prompt_embeds
            prompt_embeds = prompt_embeds_begin
            do_prompt_embeds_annealing = True
        else:
            do_prompt_embeds_annealing = False

        # Check inputs. Raise error if not correct
        self.check_inputs(prompt, height, width, callback_steps, prompt_embeds)

        # Define call parameters
        # batch_size = 1 if isinstance(prompt, str) else len(prompt)
        batch_size = 1
        if latents is not None:
            batch_size = latents.shape[0]
        if isinstance(prompt, list):
            batch_size = len(prompt)

        device = self._execution_device
        # here `guidance_scale` is defined analog to the guidance weight `w` of equation (2)
        # of the Imagen paper: https://arxiv.org/pdf/2205.11487.pdf . `guidance_scale = 1`
        # corresponds to doing no classifier free guidance.
        do_classifier_free_guidance = guidance_scale > 1.0

        # Encode input prompt
        prompt = prompt if isinstance(prompt, list) else [prompt] * batch_size
        if negative_prompt is not None:
            negative_prompt = negative_prompt if isinstance(negative_prompt, list) else [negative_prompt] * batch_size 
        if prompt_embeds is None:
            text_embeddings = self._encode_prompt(
                prompt, device, num_videos_per_prompt, do_classifier_free_guidance, negative_prompt
            )
        # If do_prompt_embeds_annealing is True, prompt_embeds and text_embeddings will be assigned in the loop below,
        # and this is just to avoid type error.
        # Otherwise, text_embeddings won't be replaced.
        else:
            text_embeddings = torch.cat([negative_prompt_embeds, prompt_embeds])

        # print(text_embeddings.shape)
        # return
        # Prepare timesteps
        self.scheduler.set_timesteps(num_inference_steps, device=device)
        timesteps = self.scheduler.timesteps

        # Prepare latent variables
        num_channels_latents = self.unet.in_channels
        latents = self.prepare_latents(
            init_image,
            init_image_strength,
            batch_size * num_videos_per_prompt,
            num_channels_latents,
            video_length,
            height,
            width,
            text_embeddings.dtype,
            device,
            generator,
            latents,
        ).to(self.torch_dtype)
        latents_dtype = latents.dtype

        # Prepare extra step kwargs.
        extra_step_kwargs = self.prepare_extra_step_kwargs(generator, eta)

        # Denoising loop
        # num_warmup_steps = 0. num_inference_steps: 30.
        # [958, 925, 892, 859, 826, 793, 760, 727, 694, 661, 628, 595, 562, 529,
        #  496, 463, 430, 397, 364, 331, 298, 265, 232, 199, 166, 133, 100,  67,
        #  34,   1]
        num_warmup_steps = len(timesteps) - num_inference_steps * self.scheduler.order
        with self.progress_bar(total=num_inference_steps) as progress_bar:
            for i, t in enumerate(timesteps):
                # expand the latents if we are doing classifier free guidance
                latent_model_input = torch.cat([latents] * 2) if do_classifier_free_guidance else latents
                latent_model_input = self.scheduler.scale_model_input(latent_model_input, t)

                down_block_additional_residuals = mid_block_additional_residual = None
                if (getattr(self, "controlnet", None) != None) and (controlnet_images != None):
                    assert controlnet_images.dim() == 5

                    controlnet_noisy_latents = latent_model_input
                    controlnet_prompt_embeds = text_embeddings

                    controlnet_images = controlnet_images.to(latents.device)

                    controlnet_cond_shape    = list(controlnet_images.shape)
                    controlnet_cond_shape[2] = video_length
                    controlnet_cond = torch.zeros(controlnet_cond_shape).to(latents.device).to(latents.dtype)

                    controlnet_conditioning_mask_shape    = list(controlnet_cond.shape)
                    controlnet_conditioning_mask_shape[1] = 1
                    controlnet_conditioning_mask          = torch.zeros(controlnet_conditioning_mask_shape).to(latents.device).to(latents.dtype)

                    assert controlnet_images.shape[2] >= len(controlnet_image_index)
                    controlnet_cond[:,:,controlnet_image_index] = controlnet_images[:,:,:len(controlnet_image_index)]
                    controlnet_conditioning_mask[:,:,controlnet_image_index] = 1


                    down_block_additional_residuals, mid_block_additional_residual = self.controlnet(
                        controlnet_noisy_latents, t,
                        encoder_hidden_states=controlnet_prompt_embeds,
                        controlnet_cond=controlnet_cond,
                        conditioning_mask=controlnet_conditioning_mask,
                        conditioning_scale=controlnet_conditioning_scale,
                        guess_mode=False, return_dict=False,
                    )

                if do_prompt_embeds_annealing:
                    # i: 0 to num_inference_steps. Anneal the first adaface_anneal_steps steps.
                    # If adaface_anneal_steps == 0, then anneal_factor is always 1.
                    anneal_factor = i / adaface_anneal_steps if i < adaface_anneal_steps else 1
                    prompt_embeds_annealed = prompt_embeds_begin + anneal_factor * (prompt_embeds_end - prompt_embeds_begin)
                    text_embeddings = torch.cat([negative_prompt_embeds, prompt_embeds_annealed])

                # predict the noise residual
                noise_pred = self.unet(
                    latent_model_input, t, 
                    encoder_hidden_states=text_embeddings,
                    down_block_additional_residuals = down_block_additional_residuals,
                    mid_block_additional_residual   = mid_block_additional_residual,
                ).sample.to(dtype=latents_dtype)

                # perform guidance
                if do_classifier_free_guidance:
                    noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
                    noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)

                # compute the previous noisy sample x_t -> x_t-1
                latents = self.scheduler.step(noise_pred, t, latents, **extra_step_kwargs).prev_sample

                # call the callback, if provided
                if i == len(timesteps) - 1 or ((i + 1) > num_warmup_steps and (i + 1) % self.scheduler.order == 0):
                    progress_bar.update()
                    if callback is not None and i % callback_steps == 0:
                        callback(i, t, latents)

        # Post-processing
        video = self.decode_latents(latents)

        # Convert to tensor
        if output_type == "tensor":
            video = torch.from_numpy(video)

        if not return_dict:
            return video

        return AnimationPipelineOutput(videos=video)
    @torch.no_grad()
    def video_edit(
        self,
        prompt: Union[str, List[str]],
        video_length: Optional[int],
        init_image: Union[PIL.Image.Image, torch.Tensor],
        init_image_strength: float = 1.0,
        height: Optional[int] = None,
        width: Optional[int] = None,
        num_inference_steps: int = 50,
        guidance_scale: float = 7.5,
        negative_prompt: Optional[Union[str, List[str]]] = None,
        num_videos_per_prompt: Optional[int] = 1,
        eta: float = 0.0,
        generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None,
        latents: Optional[torch.FloatTensor] = None,
        output_type: Optional[str] = "tensor",
        return_dict: bool = True,
        callback: Optional[Callable[[int, int, torch.FloatTensor], None]] = None,
        callback_steps: Optional[int] = 1,
        #support embeddings
        prompt_embeds: Optional[torch.FloatTensor] = None,
        negative_prompt_embeds:Optional[torch.FloatTensor] = None,
        # support controlnet
        controlnet_images: torch.FloatTensor = None,
        controlnet_image_index: list = [0],
        controlnet_conditioning_scale: Union[float, List[float]] = 1.0,
        **kwargs,
    ):
        # Default height and width to unet
        height = height or self.unet.config.sample_size * self.vae_scale_factor
        width  = width  or self.unet.config.sample_size * self.vae_scale_factor

        # Check inputs. Raise error if not correct
        self.check_inputs(prompt, height, width, callback_steps, prompt_embeds)

        # Define call parameters
        # batch_size = 1 if isinstance(prompt, str) else len(prompt)
        batch_size = 1
        if latents is not None:
            batch_size = latents.shape[0]
        if isinstance(prompt, list):
            batch_size = len(prompt)

        device = self._execution_device
        # here `guidance_scale` is defined analog to the guidance weight `w` of equation (2)
        # of the Imagen paper: https://arxiv.org/pdf/2205.11487.pdf . `guidance_scale = 1`
        # corresponds to doing no classifier free guidance.
        do_classifier_free_guidance = guidance_scale > 1.0

        # Encode input prompt
        prompt = prompt if isinstance(prompt, list) else [prompt] * batch_size
        if negative_prompt is not None:
            negative_prompt = negative_prompt if isinstance(negative_prompt, list) else [negative_prompt] * batch_size 
        if prompt_embeds is None:
            text_embeddings = self._encode_prompt(
                prompt, device, num_videos_per_prompt, do_classifier_free_guidance, negative_prompt
            )
        else:
            text_embeddings = torch.cat([negative_prompt_embeds, prompt_embeds])

        # print(text_embeddings.shape)
        # return
        # Prepare timesteps
        self.scheduler.set_timesteps(num_inference_steps, device=device)
        timesteps = self.scheduler.timesteps

        # Prepare latent variables
        num_channels_latents = self.unet.in_channels
        latents = self.prepare_latents(
            init_image,
            init_image_strength,
            batch_size * num_videos_per_prompt,
            num_channels_latents,
            video_length,
            height,
            width,
            text_embeddings.dtype,
            device,
            generator,
            latents,
        ).to(self.torch_dtype)
        latents_dtype = latents.dtype

        # Prepare extra step kwargs.
        extra_step_kwargs = self.prepare_extra_step_kwargs(generator, eta)

        # Denoising loop
        num_warmup_steps = len(timesteps) - num_inference_steps * self.scheduler.order
        with self.progress_bar(total=num_inference_steps) as progress_bar:
            for i, t in enumerate(timesteps):
                # expand the latents if we are doing classifier free guidance
                latent_model_input = torch.cat([latents] * 2) if do_classifier_free_guidance else latents
                latent_model_input = self.scheduler.scale_model_input(latent_model_input, t)

                down_block_additional_residuals = mid_block_additional_residual = None
                if (getattr(self, "controlnet", None) != None) and (controlnet_images != None):
                    assert controlnet_images.dim() == 5

                    controlnet_noisy_latents = latent_model_input
                    controlnet_prompt_embeds = text_embeddings

                    controlnet_images = controlnet_images.to(latents.device)

                    controlnet_cond_shape    = list(controlnet_images.shape)
                    controlnet_cond_shape[2] = video_length
                    controlnet_cond = torch.zeros(controlnet_cond_shape).to(latents.device)

                    controlnet_conditioning_mask_shape    = list(controlnet_cond.shape)
                    controlnet_conditioning_mask_shape[1] = 1
                    controlnet_conditioning_mask          = torch.zeros(controlnet_conditioning_mask_shape).to(latents.device)

                    assert controlnet_images.shape[2] >= len(controlnet_image_index)
                    controlnet_cond[:,:,controlnet_image_index] = controlnet_images[:,:,:len(controlnet_image_index)]
                    controlnet_conditioning_mask[:,:,controlnet_image_index] = 1

                    down_block_additional_residuals, mid_block_additional_residual = self.controlnet(
                        controlnet_noisy_latents, t,
                        encoder_hidden_states=controlnet_prompt_embeds,
                        controlnet_cond=controlnet_cond,
                        conditioning_mask=controlnet_conditioning_mask,
                        conditioning_scale=controlnet_conditioning_scale,
                        guess_mode=False, return_dict=False,
                    )
                # predict the noise residual
                noise_pred = self.unet(
                    latent_model_input, t, 
                    encoder_hidden_states=text_embeddings,
                    down_block_additional_residuals = down_block_additional_residuals,
                    mid_block_additional_residual   = mid_block_additional_residual,
                ).sample.to(dtype=latents_dtype)

                # perform guidance
                if do_classifier_free_guidance:
                    noise_pred_uncond, noise_pred_text = noise_pred.chunk(2)
                    noise_pred = noise_pred_uncond + guidance_scale * (noise_pred_text - noise_pred_uncond)

                # compute the previous noisy sample x_t -> x_t-1
                latents = self.scheduler.step(noise_pred, t, latents, **extra_step_kwargs).prev_sample

                # call the callback, if provided
                if i == len(timesteps) - 1 or ((i + 1) > num_warmup_steps and (i + 1) % self.scheduler.order == 0):
                    progress_bar.update()
                    if callback is not None and i % callback_steps == 0:
                        callback(i, t, latents)

        # Post-processing
        video = self.decode_latents(latents)

        # Convert to tensor
        if output_type == "tensor":
            video = torch.from_numpy(video)

        if not return_dict:
            return video

        return AnimationPipelineOutput(videos=video)