From af35e56a2fbc408b0054f07aff4ca1d22526526d Mon Sep 17 00:00:00 2001 From: dimitribarbot Date: Fri, 8 Nov 2024 19:07:03 +0100 Subject: [PATCH 1/5] Add reference_attn & reference_adain support for sdxl with other controlnet --- examples/community/README.md | 79 + ...table_diffusion_xl_controlnet_reference.py | 1362 +++++++++++++++++ 2 files changed, 1441 insertions(+) create mode 100644 examples/community/stable_diffusion_xl_controlnet_reference.py diff --git a/examples/community/README.md b/examples/community/README.md index d2116c6dc4e3..0384b1eb6dd6 100755 --- a/examples/community/README.md +++ b/examples/community/README.md @@ -2681,6 +2681,85 @@ Output Image `reference_attn=True, reference_adain=True, num_inference_steps=20` ![output_image](https://github.com/huggingface/diffusers/assets/34944964/9b2f1aca-886f-49c3-89ec-d2031c8e3670) +### Stable Diffusion XL ControlNet Reference + +This pipeline uses the Reference Control and with ControlNet. Refer to the [Stable Diffusion ControlNet Reference](https://github.com/huggingface/diffusers/blob/main/examples/community/README.md#stable-diffusion-controlnet-reference) and [Stable Diffusion XL Reference](https://github.com/huggingface/diffusers/blob/main/examples/community/README.md#stable-diffusion-xl-reference) sections for more information. + +```py +from diffusers import ControlNetModel, AutoencoderKL +from diffusers.schedulers import UniPCMultistepScheduler +from diffusers.utils import load_image +import numpy as np +import torch + +import cv2 +from PIL import Image + +from .stable_diffusion_xl_controlnet_reference import StableDiffusionXLControlNetReferencePipeline + +# download an image +canny_image = load_image( + "https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png" +).resize((1024, 1024)) + +ref_image = load_image( + "https://hf.co/datasets/hf-internal-testing/diffusers-images/resolve/main/sd_controlnet/hf-logo.png" +) + +# initialize the models and pipeline +controlnet_conditioning_scale = 0.5 # recommended for good generalization +controlnet = ControlNetModel.from_pretrained( + "diffusers/controlnet-canny-sdxl-1.0", torch_dtype=torch.float16 +) +vae = AutoencoderKL.from_pretrained("madebyollin/sdxl-vae-fp16-fix", torch_dtype=torch.float16) +pipe = StableDiffusionXLControlNetReferencePipeline.from_pretrained( + "stabilityai/stable-diffusion-xl-base-1.0", controlnet=controlnet, vae=vae, torch_dtype=torch.float16 +).to("cuda:0") + +pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config) + +# get canny image +image = np.array(canny_image) +image = cv2.Canny(image, 100, 200) +image = image[:, :, None] +image = np.concatenate([image, image, image], axis=2) +canny_image = Image.fromarray(image) + +# generate image +image = pipe( + prompt="1girl", + num_inference_steps=20, + controlnet_conditioning_scale=controlnet_conditioning_scale, + image=canny_image, + ref_image=ref_image, + reference_attn=False, + reference_adain=True, + style_fidelity=1.0, + generator=torch.Generator("cuda").manual_seed(42) +).images[0] +``` + +Canny ControlNet Image + +![canny_image](https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png) + +Reference Image + +![ref_image](https://hf.co/datasets/hf-internal-testing/diffusers-images/resolve/main/sd_controlnet/hf-logo.png) + +Output Image + +`prompt: 1 girl` + +`reference_attn=True, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` +![Output_image]() + +`reference_attn=False, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` +![Output_image]() + +`reference_attn=True, reference_adain=False, num_inference_steps=20, style_fidelity=1.0` +![Output_image]() + ### Stable diffusion fabric pipeline FABRIC approach applicable to a wide range of popular diffusion models, which exploits diff --git a/examples/community/stable_diffusion_xl_controlnet_reference.py b/examples/community/stable_diffusion_xl_controlnet_reference.py new file mode 100644 index 000000000000..c2812c2953f7 --- /dev/null +++ b/examples/community/stable_diffusion_xl_controlnet_reference.py @@ -0,0 +1,1362 @@ +# Based on stable_diffusion_xl_reference.py and stable_diffusion_controlnet_reference.py + +import inspect +from typing import Any, Callable, Dict, List, Optional, Tuple, Union + +import numpy as np +import PIL.Image +import torch + +from diffusers import StableDiffusionXLControlNetPipeline +from diffusers.callbacks import MultiPipelineCallbacks, PipelineCallback +from diffusers.image_processor import PipelineImageInput +from diffusers.models import ControlNetModel +from diffusers.models.attention import BasicTransformerBlock +from diffusers.models.unets.unet_2d_blocks import CrossAttnDownBlock2D, CrossAttnUpBlock2D, DownBlock2D, UpBlock2D +from diffusers.pipelines.controlnet.multicontrolnet import MultiControlNetModel +from diffusers.pipelines.stable_diffusion_xl.pipeline_output import StableDiffusionXLPipelineOutput +from diffusers.utils import PIL_INTERPOLATION, deprecate, logging, replace_example_docstring +from diffusers.utils.torch_utils import is_compiled_module, is_torch_version, randn_tensor + + +logger = logging.get_logger(__name__) # pylint: disable=invalid-name + + +EXAMPLE_DOC_STRING = """ + Examples: + ```py + >>> # !pip install opencv-python transformers accelerate + >>> from diffusers import ControlNetModel, AutoencoderKL + >>> from diffusers.schedulers import UniPCMultistepScheduler + >>> from diffusers.utils import load_image + >>> import numpy as np + >>> import torch + + >>> import cv2 + >>> from PIL import Image + + >>> # download an image for the Canny controlnet + >>> canny_image = load_image( + ... "https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png" + ... ) + + >>> # download an image for the Reference controlnet + >>> ref_image = load_image( + ... "https://hf.co/datasets/hf-internal-testing/diffusers-images/resolve/main/sd_controlnet/hf-logo.png" + ... ) + + >>> # initialize the models and pipeline + >>> controlnet_conditioning_scale = 0.5 # recommended for good generalization + >>> controlnet = ControlNetModel.from_pretrained( + ... "diffusers/controlnet-canny-sdxl-1.0", torch_dtype=torch.float16 + ... ) + >>> vae = AutoencoderKL.from_pretrained("madebyollin/sdxl-vae-fp16-fix", torch_dtype=torch.float16) + >>> pipe = StableDiffusionXLControlNetReferencePipeline.from_pretrained( + ... "stabilityai/stable-diffusion-xl-base-1.0", controlnet=controlnet, vae=vae, torch_dtype=torch.float16 + ... ).to("cuda:0") + + >>> pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config) + + >>> # get canny image + >>> image = np.array(canny_image) + >>> image = cv2.Canny(image, 100, 200) + >>> image = image[:, :, None] + >>> image = np.concatenate([image, image, image], axis=2) + >>> canny_image = Image.fromarray(image) + + >>> # generate image + >>> image = pipe( + ... prompt="1girl", + ... num_inference_steps=20, + ... controlnet_conditioning_scale=controlnet_conditioning_scale, + ... image=canny_image, + ... ref_image=ref_image, + ... reference_attn=True, + ... reference_adain=True + ... style_fidelity=1.0, + ... generator=torch.Generator("cuda").manual_seed(42) + ... ).images[0] + ``` +""" + + +def torch_dfs(model: torch.nn.Module): + result = [model] + for child in model.children(): + result += torch_dfs(child) + return result + + +# Copied from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion.retrieve_timesteps +def retrieve_timesteps( + scheduler, + num_inference_steps: Optional[int] = None, + device: Optional[Union[str, torch.device]] = None, + timesteps: Optional[List[int]] = None, + sigmas: Optional[List[float]] = None, + **kwargs, +): + r""" + Calls the scheduler's `set_timesteps` method and retrieves timesteps from the scheduler after the call. Handles + custom timesteps. Any kwargs will be supplied to `scheduler.set_timesteps`. + + Args: + scheduler (`SchedulerMixin`): + The scheduler to get timesteps from. + num_inference_steps (`int`): + The number of diffusion steps used when generating samples with a pre-trained model. If used, `timesteps` + must be `None`. + device (`str` or `torch.device`, *optional*): + The device to which the timesteps should be moved to. If `None`, the timesteps are not moved. + timesteps (`List[int]`, *optional*): + Custom timesteps used to override the timestep spacing strategy of the scheduler. If `timesteps` is passed, + `num_inference_steps` and `sigmas` must be `None`. + sigmas (`List[float]`, *optional*): + Custom sigmas used to override the timestep spacing strategy of the scheduler. If `sigmas` is passed, + `num_inference_steps` and `timesteps` must be `None`. + + Returns: + `Tuple[torch.Tensor, int]`: A tuple where the first element is the timestep schedule from the scheduler and the + second element is the number of inference steps. + """ + if timesteps is not None and sigmas is not None: + raise ValueError("Only one of `timesteps` or `sigmas` can be passed. Please choose one to set custom values") + if timesteps is not None: + accepts_timesteps = "timesteps" in set(inspect.signature(scheduler.set_timesteps).parameters.keys()) + if not accepts_timesteps: + raise ValueError( + f"The current scheduler class {scheduler.__class__}'s `set_timesteps` does not support custom" + f" timestep schedules. Please check whether you are using the correct scheduler." + ) + scheduler.set_timesteps(timesteps=timesteps, device=device, **kwargs) + timesteps = scheduler.timesteps + num_inference_steps = len(timesteps) + elif sigmas is not None: + accept_sigmas = "sigmas" in set(inspect.signature(scheduler.set_timesteps).parameters.keys()) + if not accept_sigmas: + raise ValueError( + f"The current scheduler class {scheduler.__class__}'s `set_timesteps` does not support custom" + f" sigmas schedules. Please check whether you are using the correct scheduler." + ) + scheduler.set_timesteps(sigmas=sigmas, device=device, **kwargs) + timesteps = scheduler.timesteps + num_inference_steps = len(timesteps) + else: + scheduler.set_timesteps(num_inference_steps, device=device, **kwargs) + timesteps = scheduler.timesteps + return timesteps, num_inference_steps + + +class StableDiffusionXLControlNetReferencePipeline(StableDiffusionXLControlNetPipeline): + r""" + Pipeline for text-to-image generation using Stable Diffusion XL with ControlNet guidance. + + This model inherits from [`DiffusionPipeline`]. Check the superclass documentation for the generic methods + implemented for all pipelines (downloading, saving, running on a particular device, etc.). + + The pipeline also inherits the following loading methods: + - [`~loaders.TextualInversionLoaderMixin.load_textual_inversion`] for loading textual inversion embeddings + - [`~loaders.StableDiffusionXLLoraLoaderMixin.load_lora_weights`] for loading LoRA weights + - [`~loaders.StableDiffusionXLLoraLoaderMixin.save_lora_weights`] for saving LoRA weights + - [`~loaders.FromSingleFileMixin.from_single_file`] for loading `.ckpt` files + - [`~loaders.IPAdapterMixin.load_ip_adapter`] for loading IP Adapters + + Args: + vae ([`AutoencoderKL`]): + Variational Auto-Encoder (VAE) model to encode and decode images to and from latent representations. + text_encoder ([`~transformers.CLIPTextModel`]): + Frozen text-encoder ([clip-vit-large-patch14](https://huggingface.co/openai/clip-vit-large-patch14)). + text_encoder_2 ([`~transformers.CLIPTextModelWithProjection`]): + Second frozen text-encoder + ([laion/CLIP-ViT-bigG-14-laion2B-39B-b160k](https://huggingface.co/laion/CLIP-ViT-bigG-14-laion2B-39B-b160k)). + tokenizer ([`~transformers.CLIPTokenizer`]): + A `CLIPTokenizer` to tokenize text. + tokenizer_2 ([`~transformers.CLIPTokenizer`]): + A `CLIPTokenizer` to tokenize text. + unet ([`UNet2DConditionModel`]): + A `UNet2DConditionModel` to denoise the encoded image latents. + controlnet ([`ControlNetModel`] or `List[ControlNetModel]`): + Provides additional conditioning to the `unet` during the denoising process. If you set multiple + ControlNets as a list, the outputs from each ControlNet are added together to create one combined + additional conditioning. + scheduler ([`SchedulerMixin`]): + A scheduler to be used in combination with `unet` to denoise the encoded image latents. Can be one of + [`DDIMScheduler`], [`LMSDiscreteScheduler`], or [`PNDMScheduler`]. + force_zeros_for_empty_prompt (`bool`, *optional*, defaults to `"True"`): + Whether the negative prompt embeddings should always be set to 0. Also see the config of + `stabilityai/stable-diffusion-xl-base-1-0`. + add_watermarker (`bool`, *optional*): + Whether to use the [invisible_watermark](https://github.com/ShieldMnt/invisible-watermark/) library to + watermark output images. If not defined, it defaults to `True` if the package is installed; otherwise no + watermarker is used. + """ + + def prepare_ref_latents(self, refimage, batch_size, dtype, device, generator, do_classifier_free_guidance): + refimage = refimage.to(device=device) + if self.vae.dtype == torch.float16 and self.vae.config.force_upcast: + self.upcast_vae() + refimage = refimage.to(next(iter(self.vae.post_quant_conv.parameters())).dtype) + if refimage.dtype != self.vae.dtype: + refimage = refimage.to(dtype=self.vae.dtype) + # encode the mask image into latents space so we can concatenate it to the latents + if isinstance(generator, list): + ref_image_latents = [ + self.vae.encode(refimage[i : i + 1]).latent_dist.sample(generator=generator[i]) + for i in range(batch_size) + ] + ref_image_latents = torch.cat(ref_image_latents, dim=0) + else: + ref_image_latents = self.vae.encode(refimage).latent_dist.sample(generator=generator) + ref_image_latents = self.vae.config.scaling_factor * ref_image_latents + + # duplicate mask and ref_image_latents for each generation per prompt, using mps friendly method + if ref_image_latents.shape[0] < batch_size: + if not batch_size % ref_image_latents.shape[0] == 0: + raise ValueError( + "The passed images and the required batch size don't match. Images are supposed to be duplicated" + f" to a total batch size of {batch_size}, but {ref_image_latents.shape[0]} images were passed." + " Make sure the number of images that you pass is divisible by the total requested batch size." + ) + ref_image_latents = ref_image_latents.repeat(batch_size // ref_image_latents.shape[0], 1, 1, 1) + + ref_image_latents = torch.cat([ref_image_latents] * 2) if do_classifier_free_guidance else ref_image_latents + + # aligning device to prevent device errors when concating it with the latent model input + ref_image_latents = ref_image_latents.to(device=device, dtype=dtype) + return ref_image_latents + + def prepare_ref_image( + self, + image, + width, + height, + batch_size, + num_images_per_prompt, + device, + dtype, + do_classifier_free_guidance=False, + guess_mode=False, + ): + if not isinstance(image, torch.Tensor): + if isinstance(image, PIL.Image.Image): + image = [image] + + if isinstance(image[0], PIL.Image.Image): + images = [] + + for image_ in image: + image_ = image_.convert("RGB") + image_ = image_.resize((width, height), resample=PIL_INTERPOLATION["lanczos"]) + image_ = np.array(image_) + image_ = image_[None, :] + images.append(image_) + + image = images + + image = np.concatenate(image, axis=0) + image = np.array(image).astype(np.float32) / 255.0 + image = (image - 0.5) / 0.5 + image = image.transpose(0, 3, 1, 2) + image = torch.from_numpy(image) + + elif isinstance(image[0], torch.Tensor): + image = torch.stack(image, dim=0) + + image_batch_size = image.shape[0] + + if image_batch_size == 1: + repeat_by = batch_size + else: + repeat_by = num_images_per_prompt + + image = image.repeat_interleave(repeat_by, dim=0) + + image = image.to(device=device, dtype=dtype) + + if do_classifier_free_guidance and not guess_mode: + image = torch.cat([image] * 2) + + return image + + def check_ref_inputs( + self, + ref_image, + reference_guidance_start, + reference_guidance_end, + style_fidelity, + reference_attn, + reference_adain, + ): + ref_image_is_pil = isinstance(ref_image, PIL.Image.Image) + ref_image_is_tensor = isinstance(ref_image, torch.Tensor) + + if not ref_image_is_pil and not ref_image_is_tensor: + raise TypeError( + f"ref image must be passed and be one of PIL image or torch tensor, but is {type(ref_image)}" + ) + + if not reference_attn and not reference_adain: + raise ValueError("`reference_attn` or `reference_adain` must be True.") + + if style_fidelity < 0.0: + raise ValueError(f"style fidelity: {style_fidelity} can't be smaller than 0.") + if style_fidelity > 1.0: + raise ValueError(f"style fidelity: {style_fidelity} can't be larger than 1.0.") + + if reference_guidance_start >= reference_guidance_end: + raise ValueError( + f"reference guidance start: {reference_guidance_start} cannot be larger or equal to reference guidance end: {reference_guidance_end}." + ) + if reference_guidance_start < 0.0: + raise ValueError(f"reference guidance start: {reference_guidance_start} can't be smaller than 0.") + if reference_guidance_end > 1.0: + raise ValueError(f"reference guidance end: {reference_guidance_end} can't be larger than 1.0.") + + @torch.no_grad() + @replace_example_docstring(EXAMPLE_DOC_STRING) + def __call__( + self, + prompt: Union[str, List[str]] = None, + prompt_2: Optional[Union[str, List[str]]] = None, + image: PipelineImageInput = None, + ref_image: Union[torch.Tensor, PIL.Image.Image] = None, + height: Optional[int] = None, + width: Optional[int] = None, + num_inference_steps: int = 50, + timesteps: List[int] = None, + sigmas: List[float] = None, + denoising_end: Optional[float] = None, + guidance_scale: float = 5.0, + negative_prompt: Optional[Union[str, List[str]]] = None, + negative_prompt_2: Optional[Union[str, List[str]]] = None, + num_images_per_prompt: Optional[int] = 1, + eta: float = 0.0, + generator: Optional[Union[torch.Generator, List[torch.Generator]]] = None, + latents: Optional[torch.Tensor] = None, + prompt_embeds: Optional[torch.Tensor] = None, + negative_prompt_embeds: Optional[torch.Tensor] = None, + pooled_prompt_embeds: Optional[torch.Tensor] = None, + negative_pooled_prompt_embeds: Optional[torch.Tensor] = None, + ip_adapter_image: Optional[PipelineImageInput] = None, + ip_adapter_image_embeds: Optional[List[torch.Tensor]] = None, + output_type: Optional[str] = "pil", + return_dict: bool = True, + cross_attention_kwargs: Optional[Dict[str, Any]] = None, + controlnet_conditioning_scale: Union[float, List[float]] = 1.0, + guess_mode: bool = False, + control_guidance_start: Union[float, List[float]] = 0.0, + control_guidance_end: Union[float, List[float]] = 1.0, + original_size: Tuple[int, int] = None, + crops_coords_top_left: Tuple[int, int] = (0, 0), + target_size: Tuple[int, int] = None, + negative_original_size: Optional[Tuple[int, int]] = None, + negative_crops_coords_top_left: Tuple[int, int] = (0, 0), + negative_target_size: Optional[Tuple[int, int]] = None, + clip_skip: Optional[int] = None, + callback_on_step_end: Optional[ + Union[Callable[[int, int, Dict], None], PipelineCallback, MultiPipelineCallbacks] + ] = None, + callback_on_step_end_tensor_inputs: List[str] = ["latents"], + attention_auto_machine_weight: float = 1.0, + gn_auto_machine_weight: float = 1.0, + reference_guidance_start: float = 0.0, + reference_guidance_end: float = 1.0, + style_fidelity: float = 0.5, + reference_attn: bool = True, + reference_adain: bool = True, + **kwargs, + ): + r""" + The call function to the pipeline for generation. + + Args: + prompt (`str` or `List[str]`, *optional*): + The prompt or prompts to guide image generation. If not defined, you need to pass `prompt_embeds`. + prompt_2 (`str` or `List[str]`, *optional*): + The prompt or prompts to be sent to `tokenizer_2` and `text_encoder_2`. If not defined, `prompt` is + used in both text-encoders. + image (`torch.Tensor`, `PIL.Image.Image`, `np.ndarray`, `List[torch.Tensor]`, `List[PIL.Image.Image]`, `List[np.ndarray]`,: + `List[List[torch.Tensor]]`, `List[List[np.ndarray]]` or `List[List[PIL.Image.Image]]`): + The ControlNet input condition to provide guidance to the `unet` for generation. If the type is + specified as `torch.Tensor`, it is passed to ControlNet as is. `PIL.Image.Image` can also be accepted + as an image. The dimensions of the output image defaults to `image`'s dimensions. If height and/or + width are passed, `image` is resized accordingly. If multiple ControlNets are specified in `init`, + images must be passed as a list such that each element of the list can be correctly batched for input + to a single ControlNet. + ref_image (`torch.Tensor`, `PIL.Image.Image`): + The Reference Control input condition. Reference Control uses this input condition to generate guidance to Unet. If + the type is specified as `Torch.Tensor`, it is passed to Reference Control as is. `PIL.Image.Image` can + also be accepted as an image. + height (`int`, *optional*, defaults to `self.unet.config.sample_size * self.vae_scale_factor`): + The height in pixels of the generated image. Anything below 512 pixels won't work well for + [stabilityai/stable-diffusion-xl-base-1.0](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0) + and checkpoints that are not specifically fine-tuned on low resolutions. + width (`int`, *optional*, defaults to `self.unet.config.sample_size * self.vae_scale_factor`): + The width in pixels of the generated image. Anything below 512 pixels won't work well for + [stabilityai/stable-diffusion-xl-base-1.0](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0) + and checkpoints that are not specifically fine-tuned on low resolutions. + num_inference_steps (`int`, *optional*, defaults to 50): + The number of denoising steps. More denoising steps usually lead to a higher quality image at the + expense of slower inference. + timesteps (`List[int]`, *optional*): + Custom timesteps to use for the denoising process with schedulers which support a `timesteps` argument + in their `set_timesteps` method. If not defined, the default behavior when `num_inference_steps` is + passed will be used. Must be in descending order. + sigmas (`List[float]`, *optional*): + Custom sigmas to use for the denoising process with schedulers which support a `sigmas` argument in + their `set_timesteps` method. If not defined, the default behavior when `num_inference_steps` is passed + will be used. + denoising_end (`float`, *optional*): + When specified, determines the fraction (between 0.0 and 1.0) of the total denoising process to be + completed before it is intentionally prematurely terminated. As a result, the returned sample will + still retain a substantial amount of noise as determined by the discrete timesteps selected by the + scheduler. The denoising_end parameter should ideally be utilized when this pipeline forms a part of a + "Mixture of Denoisers" multi-pipeline setup, as elaborated in [**Refining the Image + Output**](https://huggingface.co/docs/diffusers/api/pipelines/stable_diffusion/stable_diffusion_xl#refining-the-image-output) + guidance_scale (`float`, *optional*, defaults to 5.0): + A higher guidance scale value encourages the model to generate images closely linked to the text + `prompt` at the expense of lower image quality. Guidance scale is enabled when `guidance_scale > 1`. + negative_prompt (`str` or `List[str]`, *optional*): + The prompt or prompts to guide what to not include in image generation. If not defined, you need to + pass `negative_prompt_embeds` instead. Ignored when not using guidance (`guidance_scale < 1`). + negative_prompt_2 (`str` or `List[str]`, *optional*): + The prompt or prompts to guide what to not include in image generation. This is sent to `tokenizer_2` + and `text_encoder_2`. If not defined, `negative_prompt` is used in both text-encoders. + num_images_per_prompt (`int`, *optional*, defaults to 1): + The number of images to generate per prompt. + eta (`float`, *optional*, defaults to 0.0): + Corresponds to parameter eta (η) from the [DDIM](https://arxiv.org/abs/2010.02502) paper. Only applies + to the [`~schedulers.DDIMScheduler`], and is ignored in other schedulers. + generator (`torch.Generator` or `List[torch.Generator]`, *optional*): + A [`torch.Generator`](https://pytorch.org/docs/stable/generated/torch.Generator.html) to make + generation deterministic. + latents (`torch.Tensor`, *optional*): + Pre-generated noisy latents sampled from a Gaussian distribution, to be used as inputs for image + generation. Can be used to tweak the same generation with different prompts. If not provided, a latents + tensor is generated by sampling using the supplied random `generator`. + prompt_embeds (`torch.Tensor`, *optional*): + Pre-generated text embeddings. Can be used to easily tweak text inputs (prompt weighting). If not + provided, text embeddings are generated from the `prompt` input argument. + negative_prompt_embeds (`torch.Tensor`, *optional*): + Pre-generated negative text embeddings. Can be used to easily tweak text inputs (prompt weighting). If + not provided, `negative_prompt_embeds` are generated from the `negative_prompt` input argument. + pooled_prompt_embeds (`torch.Tensor`, *optional*): + Pre-generated pooled text embeddings. Can be used to easily tweak text inputs (prompt weighting). If + not provided, pooled text embeddings are generated from `prompt` input argument. + negative_pooled_prompt_embeds (`torch.Tensor`, *optional*): + Pre-generated negative pooled text embeddings. Can be used to easily tweak text inputs (prompt + weighting). If not provided, pooled `negative_prompt_embeds` are generated from `negative_prompt` input + argument. + ip_adapter_image: (`PipelineImageInput`, *optional*): Optional image input to work with IP Adapters. + ip_adapter_image_embeds (`List[torch.Tensor]`, *optional*): + Pre-generated image embeddings for IP-Adapter. It should be a list of length same as number of + IP-adapters. Each element should be a tensor of shape `(batch_size, num_images, emb_dim)`. It should + contain the negative image embedding if `do_classifier_free_guidance` is set to `True`. If not + provided, embeddings are computed from the `ip_adapter_image` input argument. + output_type (`str`, *optional*, defaults to `"pil"`): + The output format of the generated image. Choose between `PIL.Image` or `np.array`. + return_dict (`bool`, *optional*, defaults to `True`): + Whether or not to return a [`~pipelines.stable_diffusion.StableDiffusionPipelineOutput`] instead of a + plain tuple. + cross_attention_kwargs (`dict`, *optional*): + A kwargs dictionary that if specified is passed along to the [`AttentionProcessor`] as defined in + [`self.processor`](https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/attention_processor.py). + controlnet_conditioning_scale (`float` or `List[float]`, *optional*, defaults to 1.0): + The outputs of the ControlNet are multiplied by `controlnet_conditioning_scale` before they are added + to the residual in the original `unet`. If multiple ControlNets are specified in `init`, you can set + the corresponding scale as a list. + guess_mode (`bool`, *optional*, defaults to `False`): + The ControlNet encoder tries to recognize the content of the input image even if you remove all + prompts. A `guidance_scale` value between 3.0 and 5.0 is recommended. + control_guidance_start (`float` or `List[float]`, *optional*, defaults to 0.0): + The percentage of total steps at which the ControlNet starts applying. + control_guidance_end (`float` or `List[float]`, *optional*, defaults to 1.0): + The percentage of total steps at which the ControlNet stops applying. + original_size (`Tuple[int]`, *optional*, defaults to (1024, 1024)): + If `original_size` is not the same as `target_size` the image will appear to be down- or upsampled. + `original_size` defaults to `(height, width)` if not specified. Part of SDXL's micro-conditioning as + explained in section 2.2 of + [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). + crops_coords_top_left (`Tuple[int]`, *optional*, defaults to (0, 0)): + `crops_coords_top_left` can be used to generate an image that appears to be "cropped" from the position + `crops_coords_top_left` downwards. Favorable, well-centered images are usually achieved by setting + `crops_coords_top_left` to (0, 0). Part of SDXL's micro-conditioning as explained in section 2.2 of + [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). + target_size (`Tuple[int]`, *optional*, defaults to (1024, 1024)): + For most cases, `target_size` should be set to the desired height and width of the generated image. If + not specified it will default to `(height, width)`. Part of SDXL's micro-conditioning as explained in + section 2.2 of [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). + negative_original_size (`Tuple[int]`, *optional*, defaults to (1024, 1024)): + To negatively condition the generation process based on a specific image resolution. Part of SDXL's + micro-conditioning as explained in section 2.2 of + [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). For more + information, refer to this issue thread: https://github.com/huggingface/diffusers/issues/4208. + negative_crops_coords_top_left (`Tuple[int]`, *optional*, defaults to (0, 0)): + To negatively condition the generation process based on a specific crop coordinates. Part of SDXL's + micro-conditioning as explained in section 2.2 of + [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). For more + information, refer to this issue thread: https://github.com/huggingface/diffusers/issues/4208. + negative_target_size (`Tuple[int]`, *optional*, defaults to (1024, 1024)): + To negatively condition the generation process based on a target image resolution. It should be as same + as the `target_size` for most cases. Part of SDXL's micro-conditioning as explained in section 2.2 of + [https://huggingface.co/papers/2307.01952](https://huggingface.co/papers/2307.01952). For more + information, refer to this issue thread: https://github.com/huggingface/diffusers/issues/4208. + clip_skip (`int`, *optional*): + Number of layers to be skipped from CLIP while computing the prompt embeddings. A value of 1 means that + the output of the pre-final layer will be used for computing the prompt embeddings. + callback_on_step_end (`Callable`, `PipelineCallback`, `MultiPipelineCallbacks`, *optional*): + A function or a subclass of `PipelineCallback` or `MultiPipelineCallbacks` that is called at the end of + each denoising step during the inference. with the following arguments: `callback_on_step_end(self: + DiffusionPipeline, step: int, timestep: int, callback_kwargs: Dict)`. `callback_kwargs` will include a + list of all tensors as specified by `callback_on_step_end_tensor_inputs`. + callback_on_step_end_tensor_inputs (`List`, *optional*): + The list of tensor inputs for the `callback_on_step_end` function. The tensors specified in the list + will be passed as `callback_kwargs` argument. You will only be able to include variables listed in the + `._callback_tensor_inputs` attribute of your pipeline class. + attention_auto_machine_weight (`float`): + Weight of using reference query for self attention's context. + If attention_auto_machine_weight=1.0, use reference query for all self attention's context. + gn_auto_machine_weight (`float`): + Weight of using reference adain. If gn_auto_machine_weight=2.0, use all reference adain plugins. + reference_guidance_start (`float`, *optional*, defaults to 0.0): + The percentage of total steps at which the reference ControlNet starts applying. + reference_guidance_end (`float`, *optional*, defaults to 1.0): + The percentage of total steps at which the reference ControlNet stops applying. + style_fidelity (`float`): + style fidelity of ref_uncond_xt. If style_fidelity=1.0, control more important, + elif style_fidelity=0.0, prompt more important, else balanced. + reference_attn (`bool`): + Whether to use reference query for self attention's context. + reference_adain (`bool`): + Whether to use reference adain. + + Examples: + + Returns: + [`~pipelines.stable_diffusion.StableDiffusionPipelineOutput`] or `tuple`: + If `return_dict` is `True`, [`~pipelines.stable_diffusion.StableDiffusionPipelineOutput`] is returned, + otherwise a `tuple` is returned containing the output images. + """ + + callback = kwargs.pop("callback", None) + callback_steps = kwargs.pop("callback_steps", None) + + if callback is not None: + deprecate( + "callback", + "1.0.0", + "Passing `callback` as an input argument to `__call__` is deprecated, consider using `callback_on_step_end`", + ) + if callback_steps is not None: + deprecate( + "callback_steps", + "1.0.0", + "Passing `callback_steps` as an input argument to `__call__` is deprecated, consider using `callback_on_step_end`", + ) + + if isinstance(callback_on_step_end, (PipelineCallback, MultiPipelineCallbacks)): + callback_on_step_end_tensor_inputs = callback_on_step_end.tensor_inputs + + controlnet = self.controlnet._orig_mod if is_compiled_module(self.controlnet) else self.controlnet + + # align format for control guidance + if not isinstance(control_guidance_start, list) and isinstance(control_guidance_end, list): + control_guidance_start = len(control_guidance_end) * [control_guidance_start] + elif not isinstance(control_guidance_end, list) and isinstance(control_guidance_start, list): + control_guidance_end = len(control_guidance_start) * [control_guidance_end] + elif not isinstance(control_guidance_start, list) and not isinstance(control_guidance_end, list): + mult = len(controlnet.nets) if isinstance(controlnet, MultiControlNetModel) else 1 + control_guidance_start, control_guidance_end = ( + mult * [control_guidance_start], + mult * [control_guidance_end], + ) + + # 1. Check inputs. Raise error if not correct + self.check_inputs( + prompt, + prompt_2, + image, + callback_steps, + negative_prompt, + negative_prompt_2, + prompt_embeds, + negative_prompt_embeds, + pooled_prompt_embeds, + ip_adapter_image, + ip_adapter_image_embeds, + negative_pooled_prompt_embeds, + controlnet_conditioning_scale, + control_guidance_start, + control_guidance_end, + callback_on_step_end_tensor_inputs, + ) + + self.check_ref_inputs( + ref_image, + reference_guidance_start, + reference_guidance_end, + style_fidelity, + reference_attn, + reference_adain, + ) + + self._guidance_scale = guidance_scale + self._clip_skip = clip_skip + self._cross_attention_kwargs = cross_attention_kwargs + self._denoising_end = denoising_end + self._interrupt = False + + # 2. Define call parameters + if prompt is not None and isinstance(prompt, str): + batch_size = 1 + elif prompt is not None and isinstance(prompt, list): + batch_size = len(prompt) + else: + batch_size = prompt_embeds.shape[0] + + device = self._execution_device + + if isinstance(controlnet, MultiControlNetModel) and isinstance(controlnet_conditioning_scale, float): + controlnet_conditioning_scale = [controlnet_conditioning_scale] * len(controlnet.nets) + + global_pool_conditions = ( + controlnet.config.global_pool_conditions + if isinstance(controlnet, ControlNetModel) + else controlnet.nets[0].config.global_pool_conditions + ) + guess_mode = guess_mode or global_pool_conditions + + # 3.1 Encode input prompt + text_encoder_lora_scale = ( + self.cross_attention_kwargs.get("scale", None) if self.cross_attention_kwargs is not None else None + ) + ( + prompt_embeds, + negative_prompt_embeds, + pooled_prompt_embeds, + negative_pooled_prompt_embeds, + ) = self.encode_prompt( + prompt, + prompt_2, + device, + num_images_per_prompt, + self.do_classifier_free_guidance, + negative_prompt, + negative_prompt_2, + prompt_embeds=prompt_embeds, + negative_prompt_embeds=negative_prompt_embeds, + pooled_prompt_embeds=pooled_prompt_embeds, + negative_pooled_prompt_embeds=negative_pooled_prompt_embeds, + lora_scale=text_encoder_lora_scale, + clip_skip=self.clip_skip, + ) + + # 3.2 Encode ip_adapter_image + if ip_adapter_image is not None or ip_adapter_image_embeds is not None: + image_embeds = self.prepare_ip_adapter_image_embeds( + ip_adapter_image, + ip_adapter_image_embeds, + device, + batch_size * num_images_per_prompt, + self.do_classifier_free_guidance, + ) + + # 4. Prepare image + if isinstance(controlnet, ControlNetModel): + image = self.prepare_image( + image=image, + width=width, + height=height, + batch_size=batch_size * num_images_per_prompt, + num_images_per_prompt=num_images_per_prompt, + device=device, + dtype=controlnet.dtype, + do_classifier_free_guidance=self.do_classifier_free_guidance, + guess_mode=guess_mode, + ) + height, width = image.shape[-2:] + elif isinstance(controlnet, MultiControlNetModel): + images = [] + + for image_ in image: + image_ = self.prepare_image( + image=image_, + width=width, + height=height, + batch_size=batch_size * num_images_per_prompt, + num_images_per_prompt=num_images_per_prompt, + device=device, + dtype=controlnet.dtype, + do_classifier_free_guidance=self.do_classifier_free_guidance, + guess_mode=guess_mode, + ) + + images.append(image_) + + image = images + height, width = image[0].shape[-2:] + else: + assert False + + # 5. Preprocess reference image + ref_image = self.prepare_ref_image( + image=ref_image, + width=width, + height=height, + batch_size=batch_size * num_images_per_prompt, + num_images_per_prompt=num_images_per_prompt, + device=device, + dtype=prompt_embeds.dtype, + ) + + # 6. Prepare timesteps + timesteps, num_inference_steps = retrieve_timesteps( + self.scheduler, num_inference_steps, device, timesteps, sigmas + ) + self._num_timesteps = len(timesteps) + + # 7. Prepare latent variables + num_channels_latents = self.unet.config.in_channels + latents = self.prepare_latents( + batch_size * num_images_per_prompt, + num_channels_latents, + height, + width, + prompt_embeds.dtype, + device, + generator, + latents, + ) + + # 7.5 Optionally get Guidance Scale Embedding + timestep_cond = None + if self.unet.config.time_cond_proj_dim is not None: + guidance_scale_tensor = torch.tensor(self.guidance_scale - 1).repeat(batch_size * num_images_per_prompt) + timestep_cond = self.get_guidance_scale_embedding( + guidance_scale_tensor, embedding_dim=self.unet.config.time_cond_proj_dim + ).to(device=device, dtype=latents.dtype) + + # 8. Prepare reference latent variables + ref_image_latents = self.prepare_ref_latents( + ref_image, + batch_size * num_images_per_prompt, + prompt_embeds.dtype, + device, + generator, + self.do_classifier_free_guidance, + ) + + # 9. Prepare extra step kwargs. TODO: Logic should ideally just be moved out of the pipeline + extra_step_kwargs = self.prepare_extra_step_kwargs(generator, eta) + + # 9.1 Create tensor stating which controlnets to keep + controlnet_keep = [] + reference_keeps = [] + for i in range(len(timesteps)): + keeps = [ + 1.0 - float(i / len(timesteps) < s or (i + 1) / len(timesteps) > e) + for s, e in zip(control_guidance_start, control_guidance_end) + ] + controlnet_keep.append(keeps[0] if isinstance(controlnet, ControlNetModel) else keeps) + reference_keep = 1.0 - float( + i / len(timesteps) < reference_guidance_start or (i + 1) / len(timesteps) > reference_guidance_end + ) + reference_keeps.append(reference_keep) + + # 9.2 Modify self attention and group norm + MODE = "write" + uc_mask = ( + torch.Tensor([1] * batch_size * num_images_per_prompt + [0] * batch_size * num_images_per_prompt) + .type_as(ref_image_latents) + .bool() + ) + + do_classifier_free_guidance = self.do_classifier_free_guidance + + def hacked_basic_transformer_inner_forward( + self, + hidden_states: torch.Tensor, + attention_mask: Optional[torch.Tensor] = None, + encoder_hidden_states: Optional[torch.Tensor] = None, + encoder_attention_mask: Optional[torch.Tensor] = None, + timestep: Optional[torch.LongTensor] = None, + cross_attention_kwargs: Dict[str, Any] = None, + class_labels: Optional[torch.LongTensor] = None, + ): + if self.use_ada_layer_norm: + norm_hidden_states = self.norm1(hidden_states, timestep) + elif self.use_ada_layer_norm_zero: + norm_hidden_states, gate_msa, shift_mlp, scale_mlp, gate_mlp = self.norm1( + hidden_states, timestep, class_labels, hidden_dtype=hidden_states.dtype + ) + else: + norm_hidden_states = self.norm1(hidden_states) + + # 1. Self-Attention + cross_attention_kwargs = cross_attention_kwargs if cross_attention_kwargs is not None else {} + if self.only_cross_attention: + attn_output = self.attn1( + norm_hidden_states, + encoder_hidden_states=encoder_hidden_states if self.only_cross_attention else None, + attention_mask=attention_mask, + **cross_attention_kwargs, + ) + else: + if MODE == "write": + self.bank.append(norm_hidden_states.detach().clone()) + attn_output = self.attn1( + norm_hidden_states, + encoder_hidden_states=encoder_hidden_states if self.only_cross_attention else None, + attention_mask=attention_mask, + **cross_attention_kwargs, + ) + if MODE == "read": + if attention_auto_machine_weight > self.attn_weight: + attn_output_uc = self.attn1( + norm_hidden_states, + encoder_hidden_states=torch.cat([norm_hidden_states] + self.bank, dim=1), + # attention_mask=attention_mask, + **cross_attention_kwargs, + ) + attn_output_c = attn_output_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + attn_output_c[uc_mask] = self.attn1( + norm_hidden_states[uc_mask], + encoder_hidden_states=norm_hidden_states[uc_mask], + **cross_attention_kwargs, + ) + attn_output = style_fidelity * attn_output_c + (1.0 - style_fidelity) * attn_output_uc + self.bank.clear() + else: + attn_output = self.attn1( + norm_hidden_states, + encoder_hidden_states=encoder_hidden_states if self.only_cross_attention else None, + attention_mask=attention_mask, + **cross_attention_kwargs, + ) + if self.use_ada_layer_norm_zero: + attn_output = gate_msa.unsqueeze(1) * attn_output + hidden_states = attn_output + hidden_states + + if self.attn2 is not None: + norm_hidden_states = ( + self.norm2(hidden_states, timestep) if self.use_ada_layer_norm else self.norm2(hidden_states) + ) + + # 2. Cross-Attention + attn_output = self.attn2( + norm_hidden_states, + encoder_hidden_states=encoder_hidden_states, + attention_mask=encoder_attention_mask, + **cross_attention_kwargs, + ) + hidden_states = attn_output + hidden_states + + # 3. Feed-forward + norm_hidden_states = self.norm3(hidden_states) + + if self.use_ada_layer_norm_zero: + norm_hidden_states = norm_hidden_states * (1 + scale_mlp[:, None]) + shift_mlp[:, None] + + ff_output = self.ff(norm_hidden_states) + + if self.use_ada_layer_norm_zero: + ff_output = gate_mlp.unsqueeze(1) * ff_output + + hidden_states = ff_output + hidden_states + + return hidden_states + + def hacked_mid_forward(self, *args, **kwargs): + eps = 1e-6 + x = self.original_forward(*args, **kwargs) + if MODE == "write": + if gn_auto_machine_weight >= self.gn_weight: + var, mean = torch.var_mean(x, dim=(2, 3), keepdim=True, correction=0) + self.mean_bank.append(mean) + self.var_bank.append(var) + if MODE == "read": + if len(self.mean_bank) > 0 and len(self.var_bank) > 0: + var, mean = torch.var_mean(x, dim=(2, 3), keepdim=True, correction=0) + std = torch.maximum(var, torch.zeros_like(var) + eps) ** 0.5 + mean_acc = sum(self.mean_bank) / float(len(self.mean_bank)) + var_acc = sum(self.var_bank) / float(len(self.var_bank)) + std_acc = torch.maximum(var_acc, torch.zeros_like(var_acc) + eps) ** 0.5 + x_uc = (((x - mean) / std) * std_acc) + mean_acc + x_c = x_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + x_c[uc_mask] = x[uc_mask] + x = style_fidelity * x_c + (1.0 - style_fidelity) * x_uc + self.mean_bank = [] + self.var_bank = [] + return x + + def hack_CrossAttnDownBlock2D_forward( + self, + hidden_states: torch.Tensor, + temb: Optional[torch.Tensor] = None, + encoder_hidden_states: Optional[torch.Tensor] = None, + attention_mask: Optional[torch.Tensor] = None, + cross_attention_kwargs: Optional[Dict[str, Any]] = None, + encoder_attention_mask: Optional[torch.Tensor] = None, + ): + eps = 1e-6 + + # TODO(Patrick, William) - attention mask is not used + output_states = () + + for i, (resnet, attn) in enumerate(zip(self.resnets, self.attentions)): + hidden_states = resnet(hidden_states, temb) + hidden_states = attn( + hidden_states, + encoder_hidden_states=encoder_hidden_states, + cross_attention_kwargs=cross_attention_kwargs, + attention_mask=attention_mask, + encoder_attention_mask=encoder_attention_mask, + return_dict=False, + )[0] + if MODE == "write": + if gn_auto_machine_weight >= self.gn_weight: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + self.mean_bank.append([mean]) + self.var_bank.append([var]) + if MODE == "read": + if len(self.mean_bank) > 0 and len(self.var_bank) > 0: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + std = torch.maximum(var, torch.zeros_like(var) + eps) ** 0.5 + mean_acc = sum(self.mean_bank[i]) / float(len(self.mean_bank[i])) + var_acc = sum(self.var_bank[i]) / float(len(self.var_bank[i])) + std_acc = torch.maximum(var_acc, torch.zeros_like(var_acc) + eps) ** 0.5 + hidden_states_uc = (((hidden_states - mean) / std) * std_acc) + mean_acc + hidden_states_c = hidden_states_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + hidden_states_c[uc_mask] = hidden_states[uc_mask] + hidden_states = style_fidelity * hidden_states_c + (1.0 - style_fidelity) * hidden_states_uc + + output_states = output_states + (hidden_states,) + + if MODE == "read": + self.mean_bank = [] + self.var_bank = [] + + if self.downsamplers is not None: + for downsampler in self.downsamplers: + hidden_states = downsampler(hidden_states) + + output_states = output_states + (hidden_states,) + + return hidden_states, output_states + + def hacked_DownBlock2D_forward(self, hidden_states, temb=None, *args, **kwargs): + eps = 1e-6 + + output_states = () + + for i, resnet in enumerate(self.resnets): + hidden_states = resnet(hidden_states, temb) + + if MODE == "write": + if gn_auto_machine_weight >= self.gn_weight: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + self.mean_bank.append([mean]) + self.var_bank.append([var]) + if MODE == "read": + if len(self.mean_bank) > 0 and len(self.var_bank) > 0: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + std = torch.maximum(var, torch.zeros_like(var) + eps) ** 0.5 + mean_acc = sum(self.mean_bank[i]) / float(len(self.mean_bank[i])) + var_acc = sum(self.var_bank[i]) / float(len(self.var_bank[i])) + std_acc = torch.maximum(var_acc, torch.zeros_like(var_acc) + eps) ** 0.5 + hidden_states_uc = (((hidden_states - mean) / std) * std_acc) + mean_acc + hidden_states_c = hidden_states_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + hidden_states_c[uc_mask] = hidden_states[uc_mask] + hidden_states = style_fidelity * hidden_states_c + (1.0 - style_fidelity) * hidden_states_uc + + output_states = output_states + (hidden_states,) + + if MODE == "read": + self.mean_bank = [] + self.var_bank = [] + + if self.downsamplers is not None: + for downsampler in self.downsamplers: + hidden_states = downsampler(hidden_states) + + output_states = output_states + (hidden_states,) + + return hidden_states, output_states + + def hacked_CrossAttnUpBlock2D_forward( + self, + hidden_states: torch.Tensor, + res_hidden_states_tuple: Tuple[torch.Tensor, ...], + temb: Optional[torch.Tensor] = None, + encoder_hidden_states: Optional[torch.Tensor] = None, + cross_attention_kwargs: Optional[Dict[str, Any]] = None, + upsample_size: Optional[int] = None, + attention_mask: Optional[torch.Tensor] = None, + encoder_attention_mask: Optional[torch.Tensor] = None, + ): + eps = 1e-6 + # TODO(Patrick, William) - attention mask is not used + for i, (resnet, attn) in enumerate(zip(self.resnets, self.attentions)): + # pop res hidden states + res_hidden_states = res_hidden_states_tuple[-1] + res_hidden_states_tuple = res_hidden_states_tuple[:-1] + hidden_states = torch.cat([hidden_states, res_hidden_states], dim=1) + hidden_states = resnet(hidden_states, temb) + hidden_states = attn( + hidden_states, + encoder_hidden_states=encoder_hidden_states, + cross_attention_kwargs=cross_attention_kwargs, + attention_mask=attention_mask, + encoder_attention_mask=encoder_attention_mask, + return_dict=False, + )[0] + + if MODE == "write": + if gn_auto_machine_weight >= self.gn_weight: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + self.mean_bank.append([mean]) + self.var_bank.append([var]) + if MODE == "read": + if len(self.mean_bank) > 0 and len(self.var_bank) > 0: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + std = torch.maximum(var, torch.zeros_like(var) + eps) ** 0.5 + mean_acc = sum(self.mean_bank[i]) / float(len(self.mean_bank[i])) + var_acc = sum(self.var_bank[i]) / float(len(self.var_bank[i])) + std_acc = torch.maximum(var_acc, torch.zeros_like(var_acc) + eps) ** 0.5 + hidden_states_uc = (((hidden_states - mean) / std) * std_acc) + mean_acc + hidden_states_c = hidden_states_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + hidden_states_c[uc_mask] = hidden_states[uc_mask] + hidden_states = style_fidelity * hidden_states_c + (1.0 - style_fidelity) * hidden_states_uc + + if MODE == "read": + self.mean_bank = [] + self.var_bank = [] + + if self.upsamplers is not None: + for upsampler in self.upsamplers: + hidden_states = upsampler(hidden_states, upsample_size) + + return hidden_states + + def hacked_UpBlock2D_forward( + self, hidden_states, res_hidden_states_tuple, temb=None, upsample_size=None, *args, **kwargs + ): + eps = 1e-6 + for i, resnet in enumerate(self.resnets): + # pop res hidden states + res_hidden_states = res_hidden_states_tuple[-1] + res_hidden_states_tuple = res_hidden_states_tuple[:-1] + hidden_states = torch.cat([hidden_states, res_hidden_states], dim=1) + hidden_states = resnet(hidden_states, temb) + + if MODE == "write": + if gn_auto_machine_weight >= self.gn_weight: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + self.mean_bank.append([mean]) + self.var_bank.append([var]) + if MODE == "read": + if len(self.mean_bank) > 0 and len(self.var_bank) > 0: + var, mean = torch.var_mean(hidden_states, dim=(2, 3), keepdim=True, correction=0) + std = torch.maximum(var, torch.zeros_like(var) + eps) ** 0.5 + mean_acc = sum(self.mean_bank[i]) / float(len(self.mean_bank[i])) + var_acc = sum(self.var_bank[i]) / float(len(self.var_bank[i])) + std_acc = torch.maximum(var_acc, torch.zeros_like(var_acc) + eps) ** 0.5 + hidden_states_uc = (((hidden_states - mean) / std) * std_acc) + mean_acc + hidden_states_c = hidden_states_uc.clone() + if do_classifier_free_guidance and style_fidelity > 0: + hidden_states_c[uc_mask] = hidden_states[uc_mask] + hidden_states = style_fidelity * hidden_states_c + (1.0 - style_fidelity) * hidden_states_uc + + if MODE == "read": + self.mean_bank = [] + self.var_bank = [] + + if self.upsamplers is not None: + for upsampler in self.upsamplers: + hidden_states = upsampler(hidden_states, upsample_size) + + return hidden_states + + if reference_attn: + attn_modules = [module for module in torch_dfs(self.unet) if isinstance(module, BasicTransformerBlock)] + attn_modules = sorted(attn_modules, key=lambda x: -x.norm1.normalized_shape[0]) + + for i, module in enumerate(attn_modules): + module._original_inner_forward = module.forward + module.forward = hacked_basic_transformer_inner_forward.__get__(module, BasicTransformerBlock) + module.bank = [] + module.attn_weight = float(i) / float(len(attn_modules)) + + if reference_adain: + gn_modules = [self.unet.mid_block] + self.unet.mid_block.gn_weight = 0 + + down_blocks = self.unet.down_blocks + for w, module in enumerate(down_blocks): + module.gn_weight = 1.0 - float(w) / float(len(down_blocks)) + gn_modules.append(module) + + up_blocks = self.unet.up_blocks + for w, module in enumerate(up_blocks): + module.gn_weight = float(w) / float(len(up_blocks)) + gn_modules.append(module) + + for i, module in enumerate(gn_modules): + if getattr(module, "original_forward", None) is None: + module.original_forward = module.forward + if i == 0: + # mid_block + module.forward = hacked_mid_forward.__get__(module, torch.nn.Module) + elif isinstance(module, CrossAttnDownBlock2D): + module.forward = hack_CrossAttnDownBlock2D_forward.__get__(module, CrossAttnDownBlock2D) + elif isinstance(module, DownBlock2D): + module.forward = hacked_DownBlock2D_forward.__get__(module, DownBlock2D) + elif isinstance(module, CrossAttnUpBlock2D): + module.forward = hacked_CrossAttnUpBlock2D_forward.__get__(module, CrossAttnUpBlock2D) + elif isinstance(module, UpBlock2D): + module.forward = hacked_UpBlock2D_forward.__get__(module, UpBlock2D) + module.mean_bank = [] + module.var_bank = [] + module.gn_weight *= 2 + + # 9.2 Prepare added time ids & embeddings + if isinstance(image, list): + original_size = original_size or image[0].shape[-2:] + else: + original_size = original_size or image.shape[-2:] + target_size = target_size or (height, width) + + add_text_embeds = pooled_prompt_embeds + if self.text_encoder_2 is None: + text_encoder_projection_dim = int(pooled_prompt_embeds.shape[-1]) + else: + text_encoder_projection_dim = self.text_encoder_2.config.projection_dim + + add_time_ids = self._get_add_time_ids( + original_size, + crops_coords_top_left, + target_size, + dtype=prompt_embeds.dtype, + text_encoder_projection_dim=text_encoder_projection_dim, + ) + + if negative_original_size is not None and negative_target_size is not None: + negative_add_time_ids = self._get_add_time_ids( + negative_original_size, + negative_crops_coords_top_left, + negative_target_size, + dtype=prompt_embeds.dtype, + text_encoder_projection_dim=text_encoder_projection_dim, + ) + else: + negative_add_time_ids = add_time_ids + + if self.do_classifier_free_guidance: + prompt_embeds = torch.cat([negative_prompt_embeds, prompt_embeds], dim=0) + add_text_embeds = torch.cat([negative_pooled_prompt_embeds, add_text_embeds], dim=0) + add_time_ids = torch.cat([negative_add_time_ids, add_time_ids], dim=0) + + prompt_embeds = prompt_embeds.to(device) + add_text_embeds = add_text_embeds.to(device) + add_time_ids = add_time_ids.to(device).repeat(batch_size * num_images_per_prompt, 1) + + # 10. Denoising loop + num_warmup_steps = len(timesteps) - num_inference_steps * self.scheduler.order + + # 10.1 Apply denoising_end + if ( + self.denoising_end is not None + and isinstance(self.denoising_end, float) + and self.denoising_end > 0 + and self.denoising_end < 1 + ): + discrete_timestep_cutoff = int( + round( + self.scheduler.config.num_train_timesteps + - (self.denoising_end * self.scheduler.config.num_train_timesteps) + ) + ) + num_inference_steps = len(list(filter(lambda ts: ts >= discrete_timestep_cutoff, timesteps))) + timesteps = timesteps[:num_inference_steps] + + is_unet_compiled = is_compiled_module(self.unet) + is_controlnet_compiled = is_compiled_module(self.controlnet) + is_torch_higher_equal_2_1 = is_torch_version(">=", "2.1") + with self.progress_bar(total=num_inference_steps) as progress_bar: + for i, t in enumerate(timesteps): + if self.interrupt: + continue + + # Relevant thread: + # https://dev-discuss.pytorch.org/t/cudagraphs-in-pytorch-2-0/1428 + if (is_unet_compiled and is_controlnet_compiled) and is_torch_higher_equal_2_1: + torch._inductor.cudagraph_mark_step_begin() + # expand the latents if we are doing classifier free guidance + latent_model_input = torch.cat([latents] * 2) if self.do_classifier_free_guidance else latents + latent_model_input = self.scheduler.scale_model_input(latent_model_input, t) + + added_cond_kwargs = {"text_embeds": add_text_embeds, "time_ids": add_time_ids} + + # controlnet(s) inference + if guess_mode and self.do_classifier_free_guidance: + # Infer ControlNet only for the conditional batch. + control_model_input = latents + control_model_input = self.scheduler.scale_model_input(control_model_input, t) + controlnet_prompt_embeds = prompt_embeds.chunk(2)[1] + controlnet_added_cond_kwargs = { + "text_embeds": add_text_embeds.chunk(2)[1], + "time_ids": add_time_ids.chunk(2)[1], + } + else: + control_model_input = latent_model_input + controlnet_prompt_embeds = prompt_embeds + controlnet_added_cond_kwargs = added_cond_kwargs + + if isinstance(controlnet_keep[i], list): + cond_scale = [c * s for c, s in zip(controlnet_conditioning_scale, controlnet_keep[i])] + else: + controlnet_cond_scale = controlnet_conditioning_scale + if isinstance(controlnet_cond_scale, list): + controlnet_cond_scale = controlnet_cond_scale[0] + cond_scale = controlnet_cond_scale * controlnet_keep[i] + + down_block_res_samples, mid_block_res_sample = self.controlnet( + control_model_input, + t, + encoder_hidden_states=controlnet_prompt_embeds, + controlnet_cond=image, + conditioning_scale=cond_scale, + guess_mode=guess_mode, + added_cond_kwargs=controlnet_added_cond_kwargs, + return_dict=False, + ) + + if guess_mode and self.do_classifier_free_guidance: + # Inferred ControlNet only for the conditional batch. + # To apply the output of ControlNet to both the unconditional and conditional batches, + # add 0 to the unconditional batch to keep it unchanged. + down_block_res_samples = [torch.cat([torch.zeros_like(d), d]) for d in down_block_res_samples] + mid_block_res_sample = torch.cat([torch.zeros_like(mid_block_res_sample), mid_block_res_sample]) + + if ip_adapter_image is not None or ip_adapter_image_embeds is not None: + added_cond_kwargs["image_embeds"] = image_embeds + + # ref only part + if reference_keeps[i] > 0: + noise = randn_tensor( + ref_image_latents.shape, generator=generator, device=device, dtype=ref_image_latents.dtype + ) + ref_xt = self.scheduler.add_noise( + ref_image_latents, + noise, + t.reshape( + 1, + ), + ) + ref_xt = self.scheduler.scale_model_input(ref_xt, t) + + MODE = "write" + self.unet( + ref_xt, + t, + encoder_hidden_states=prompt_embeds, + cross_attention_kwargs=cross_attention_kwargs, + added_cond_kwargs=added_cond_kwargs, + return_dict=False, + ) + + # predict the noise residual + MODE = "read" + noise_pred = self.unet( + latent_model_input, + t, + encoder_hidden_states=prompt_embeds, + timestep_cond=timestep_cond, + cross_attention_kwargs=self.cross_attention_kwargs, + down_block_additional_residuals=down_block_res_samples, + mid_block_additional_residual=mid_block_res_sample, + added_cond_kwargs=added_cond_kwargs, + return_dict=False, + )[0] + + # perform guidance + if self.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, return_dict=False)[0] + + if callback_on_step_end is not None: + callback_kwargs = {} + for k in callback_on_step_end_tensor_inputs: + callback_kwargs[k] = locals()[k] + callback_outputs = callback_on_step_end(self, i, t, callback_kwargs) + + latents = callback_outputs.pop("latents", latents) + prompt_embeds = callback_outputs.pop("prompt_embeds", prompt_embeds) + negative_prompt_embeds = callback_outputs.pop("negative_prompt_embeds", negative_prompt_embeds) + add_text_embeds = callback_outputs.pop("add_text_embeds", add_text_embeds) + negative_pooled_prompt_embeds = callback_outputs.pop( + "negative_pooled_prompt_embeds", negative_pooled_prompt_embeds + ) + add_time_ids = callback_outputs.pop("add_time_ids", add_time_ids) + negative_add_time_ids = callback_outputs.pop("negative_add_time_ids", negative_add_time_ids) + + # 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: + step_idx = i // getattr(self.scheduler, "order", 1) + callback(step_idx, t, latents) + + if not output_type == "latent": + # make sure the VAE is in float32 mode, as it overflows in float16 + needs_upcasting = self.vae.dtype == torch.float16 and self.vae.config.force_upcast + + if needs_upcasting: + self.upcast_vae() + latents = latents.to(next(iter(self.vae.post_quant_conv.parameters())).dtype) + + # unscale/denormalize the latents + # denormalize with the mean and std if available and not None + has_latents_mean = hasattr(self.vae.config, "latents_mean") and self.vae.config.latents_mean is not None + has_latents_std = hasattr(self.vae.config, "latents_std") and self.vae.config.latents_std is not None + if has_latents_mean and has_latents_std: + latents_mean = ( + torch.tensor(self.vae.config.latents_mean).view(1, 4, 1, 1).to(latents.device, latents.dtype) + ) + latents_std = ( + torch.tensor(self.vae.config.latents_std).view(1, 4, 1, 1).to(latents.device, latents.dtype) + ) + latents = latents * latents_std / self.vae.config.scaling_factor + latents_mean + else: + latents = latents / self.vae.config.scaling_factor + + image = self.vae.decode(latents, return_dict=False)[0] + + # cast back to fp16 if needed + if needs_upcasting: + self.vae.to(dtype=torch.float16) + else: + image = latents + + if not output_type == "latent": + # apply watermark if available + if self.watermark is not None: + image = self.watermark.apply_watermark(image) + + image = self.image_processor.postprocess(image, output_type=output_type) + + # Offload all models + self.maybe_free_model_hooks() + + if not return_dict: + return (image,) + + return StableDiffusionXLPipelineOutput(images=image) From 8fa05d7fcfaf5f2406a0c3984ed805e272cabc1a Mon Sep 17 00:00:00 2001 From: Dimitri Barbot Date: Fri, 8 Nov 2024 19:17:55 +0100 Subject: [PATCH 2/5] Update README.md --- examples/community/README.md | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/examples/community/README.md b/examples/community/README.md index 0384b1eb6dd6..938b528442df 100755 --- a/examples/community/README.md +++ b/examples/community/README.md @@ -2659,7 +2659,7 @@ Output Image `prompt: 1 girl` `reference_attn=True, reference_adain=True, num_inference_steps=20` -![Output_image](https://github.com/zideliu/diffusers/assets/34944964/743848da-a215-48f9-ae39-b5e2ae49fb13) +![Output_image](https://github.com/user-attachments/assets/4fd5bc0b-8df6-4581-9191-c07faaf10ce8) Reference Image ![reference_image](https://github.com/huggingface/diffusers/assets/34944964/449bdab6-e744-4fb2-9620-d4068d9a741b) @@ -2752,13 +2752,16 @@ Output Image `prompt: 1 girl` `reference_attn=True, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image]() + +![Output_image](https://github.com/user-attachments/assets/b320f081-2421-4b96-9ef1-4685b77179ba) `reference_attn=False, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image]() + +![Output_image](https://github.com/user-attachments/assets/05ee0816-6c4e-4f4b-81fc-71bb0082be1e) `reference_attn=True, reference_adain=False, num_inference_steps=20, style_fidelity=1.0` -![Output_image]() + +![Output_image](https://github.com/user-attachments/assets/cfb7426b-9e1b-4401-8e7e-609d67b84f8b) ### Stable diffusion fabric pipeline @@ -4771,4 +4774,4 @@ with torch.no_grad(): ``` In the folder examples/pixart there is also a script that can be used to train new models. -Please check the script `train_controlnet_hf_diffusers.sh` on how to start the training. \ No newline at end of file +Please check the script `train_controlnet_hf_diffusers.sh` on how to start the training. From 53e6ee94f8fe9a5a384e4277a131adaa48ac2050 Mon Sep 17 00:00:00 2001 From: Dimitri Barbot Date: Fri, 15 Nov 2024 19:46:18 +0100 Subject: [PATCH 3/5] Update README.md by replacing human example with a cat one Replace human example with a cat one --- examples/community/README.md | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/examples/community/README.md b/examples/community/README.md index 938b528442df..5e237a351446 100755 --- a/examples/community/README.md +++ b/examples/community/README.md @@ -2659,7 +2659,7 @@ Output Image `prompt: 1 girl` `reference_attn=True, reference_adain=True, num_inference_steps=20` -![Output_image](https://github.com/user-attachments/assets/4fd5bc0b-8df6-4581-9191-c07faaf10ce8) +![Output_image](https://github.com/zideliu/diffusers/assets/34944964/743848da-a215-48f9-ae39-b5e2ae49fb13) Reference Image ![reference_image](https://github.com/huggingface/diffusers/assets/34944964/449bdab6-e744-4fb2-9620-d4068d9a741b) @@ -2699,8 +2699,8 @@ from .stable_diffusion_xl_controlnet_reference import StableDiffusionXLControlNe # download an image canny_image = load_image( - "https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png" -).resize((1024, 1024)) + "https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a" +) ref_image = load_image( "https://hf.co/datasets/hf-internal-testing/diffusers-images/resolve/main/sd_controlnet/hf-logo.png" @@ -2727,7 +2727,7 @@ canny_image = Image.fromarray(image) # generate image image = pipe( - prompt="1girl", + prompt="a cat", num_inference_steps=20, controlnet_conditioning_scale=controlnet_conditioning_scale, image=canny_image, @@ -2741,7 +2741,7 @@ image = pipe( Canny ControlNet Image -![canny_image](https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png) +![canny_image](https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a) Reference Image @@ -2749,19 +2749,19 @@ Reference Image Output Image -`prompt: 1 girl` +`prompt: a cat` `reference_attn=True, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/b320f081-2421-4b96-9ef1-4685b77179ba) +![Output_image](https://github.com/user-attachments/assets/2097baad-e19b-432c-af18-8eb74af3e5dc) `reference_attn=False, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/05ee0816-6c4e-4f4b-81fc-71bb0082be1e) +![Output_image](https://github.com/user-attachments/assets/5db2ad5d-7b01-4a4e-ba05-67342f67c195) `reference_attn=True, reference_adain=False, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/cfb7426b-9e1b-4401-8e7e-609d67b84f8b) +![Output_image](https://github.com/user-attachments/assets/6041bc36-a972-467d-b656-a6a9a742b8bd) ### Stable diffusion fabric pipeline From ba48247d9199b4b5150ee6ec4083c51e9e7995f4 Mon Sep 17 00:00:00 2001 From: Dimitri Barbot Date: Fri, 15 Nov 2024 19:48:33 +0100 Subject: [PATCH 4/5] Replace default human example with a cat one --- .../community/stable_diffusion_xl_controlnet_reference.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/examples/community/stable_diffusion_xl_controlnet_reference.py b/examples/community/stable_diffusion_xl_controlnet_reference.py index c2812c2953f7..c9e2e4ab8a7e 100644 --- a/examples/community/stable_diffusion_xl_controlnet_reference.py +++ b/examples/community/stable_diffusion_xl_controlnet_reference.py @@ -37,7 +37,7 @@ >>> # download an image for the Canny controlnet >>> canny_image = load_image( - ... "https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png" + ... "https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a" ... ) >>> # download an image for the Reference controlnet @@ -66,7 +66,7 @@ >>> # generate image >>> image = pipe( - ... prompt="1girl", + ... prompt="a cat", ... num_inference_steps=20, ... controlnet_conditioning_scale=controlnet_conditioning_scale, ... image=canny_image, From 8722a36b4541356e2fea1a9fa6e67990074d820b Mon Sep 17 00:00:00 2001 From: dimitribarbot Date: Sat, 16 Nov 2024 14:40:48 +0100 Subject: [PATCH 5/5] Use example images from huggingface documentation-images repository --- examples/community/README.md | 10 +++++----- .../stable_diffusion_xl_controlnet_reference.py | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/examples/community/README.md b/examples/community/README.md index 5e237a351446..32f9281f136e 100755 --- a/examples/community/README.md +++ b/examples/community/README.md @@ -2699,7 +2699,7 @@ from .stable_diffusion_xl_controlnet_reference import StableDiffusionXLControlNe # download an image canny_image = load_image( - "https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a" + "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_input_cat.jpg" ) ref_image = load_image( @@ -2741,7 +2741,7 @@ image = pipe( Canny ControlNet Image -![canny_image](https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a) +![canny_image](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_input_cat.jpg) Reference Image @@ -2753,15 +2753,15 @@ Output Image `reference_attn=True, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/2097baad-e19b-432c-af18-8eb74af3e5dc) +![Output_image](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_attn_adain_canny_cat.png) `reference_attn=False, reference_adain=True, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/5db2ad5d-7b01-4a4e-ba05-67342f67c195) +![Output_image](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_adain_canny_cat.png) `reference_attn=True, reference_adain=False, num_inference_steps=20, style_fidelity=1.0` -![Output_image](https://github.com/user-attachments/assets/6041bc36-a972-467d-b656-a6a9a742b8bd) +![Output_image](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_attn_canny_cat.png) ### Stable diffusion fabric pipeline diff --git a/examples/community/stable_diffusion_xl_controlnet_reference.py b/examples/community/stable_diffusion_xl_controlnet_reference.py index c9e2e4ab8a7e..ac3159e5e6e8 100644 --- a/examples/community/stable_diffusion_xl_controlnet_reference.py +++ b/examples/community/stable_diffusion_xl_controlnet_reference.py @@ -37,7 +37,7 @@ >>> # download an image for the Canny controlnet >>> canny_image = load_image( - ... "https://github.com/user-attachments/assets/b87eb308-2309-43af-9b53-aae4400c1e6a" + ... "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/sdxl_reference_input_cat.jpg" ... ) >>> # download an image for the Reference controlnet