Delete controlnet_flux.py

controlnet_flux.py

@@ -1,649 +0,0 @@
-# type: ignore
-# Copyright 2024 Black Forest Labs, The HuggingFace Team and The InstantX Team. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from dataclasses import dataclass
-from typing import Any, Dict, List, Optional, Tuple, Union
-
-import torch
-import torch.nn as nn
-
-from transformer_bria import TimestepProjEmbeddings
-from diffusers.models.controlnet import zero_module, BaseOutput
-from diffusers.configuration_utils import ConfigMixin, register_to_config
-from diffusers.loaders import PeftAdapterMixin
-from diffusers.models.modeling_utils import ModelMixin
-from diffusers.utils import USE_PEFT_BACKEND, is_torch_version, logging, scale_lora_layers, unscale_lora_layers
-from diffusers.models.modeling_outputs import Transformer2DModelOutput
-
-# from transformer_flux import FluxSingleTransformerBlock, FluxTransformerBlock, EmbedND
-from diffusers.models.transformers.transformer_flux import EmbedND, FluxSingleTransformerBlock, FluxTransformerBlock
-
-from diffusers.models.attention_processor import AttentionProcessor
-
-logger = logging.get_logger(__name__)  # pylint: disable=invalid-name
-
-
-@dataclass
-class FluxControlNetOutput(BaseOutput):
-    controlnet_block_samples: Tuple[torch.Tensor]
-    controlnet_single_block_samples: Tuple[torch.Tensor]
-
-
-class FluxControlNetModel(ModelMixin, ConfigMixin, PeftAdapterMixin):
-    _supports_gradient_checkpointing = True
-
-    @register_to_config
-    def __init__(
-        self,
-        patch_size: int = 1,
-        in_channels: int = 64,
-        num_layers: int = 19,
-        num_single_layers: int = 38,
-        attention_head_dim: int = 128,
-        num_attention_heads: int = 24,
-        joint_attention_dim: int = 4096,
-        pooled_projection_dim: int = 768,
-        guidance_embeds: bool = False,
-        axes_dims_rope: List[int] = [16, 56, 56],
-        num_mode: int = None,
-        rope_theta: int = 10000,
-        time_theta: int = 10000,
-    ):
-        super().__init__()
-        self.out_channels = in_channels
-        self.inner_dim = num_attention_heads * attention_head_dim
-
-        # self.pos_embed = FluxPosEmbed(theta=10000, axes_dim=axes_dims_rope)
-        self.pos_embed = EmbedND(dim=self.inner_dim, theta=rope_theta, axes_dim=axes_dims_rope)
-
-        # text_time_guidance_cls = (
-        # CombinedTimestepGuidanceTextProjEmbeddings if guidance_embeds else CombinedTimestepTextProjEmbeddings
-        # )
-        # self.time_text_embed = text_time_guidance_cls(
-        # embedding_dim=self.inner_dim, pooled_projection_dim=pooled_projection_dim
-        # )
-        self.time_embed = TimestepProjEmbeddings(
-            embedding_dim=self.inner_dim,time_theta=time_theta
-        )
-        self.context_embedder = nn.Linear(joint_attention_dim, self.inner_dim)
-        self.x_embedder = torch.nn.Linear(in_channels, self.inner_dim)
-
-        self.transformer_blocks = nn.ModuleList(
-            [
-                FluxTransformerBlock(
-                    dim=self.inner_dim,
-                    num_attention_heads=num_attention_heads,
-                    attention_head_dim=attention_head_dim,
-                )
-                for i in range(num_layers)
-            ]
-        )
-
-        self.single_transformer_blocks = nn.ModuleList(
-            [
-                FluxSingleTransformerBlock(
-                    dim=self.inner_dim,
-                    num_attention_heads=num_attention_heads,
-                    attention_head_dim=attention_head_dim,
-                )
-                for i in range(num_single_layers)
-            ]
-        )
-
-        # controlnet_blocks
-        self.controlnet_blocks = nn.ModuleList([])
-        for _ in range(len(self.transformer_blocks)):
-            self.controlnet_blocks.append(zero_module(nn.Linear(self.inner_dim, self.inner_dim)))
-
-        self.controlnet_single_blocks = nn.ModuleList([])
-        for _ in range(len(self.single_transformer_blocks)):
-            self.controlnet_single_blocks.append(zero_module(nn.Linear(self.inner_dim, self.inner_dim)))
-
-        self.union = num_mode is not None and num_mode > 0
-        if self.union:
-            self.controlnet_mode_embedder = nn.Embedding(num_mode, self.inner_dim)
-
-        self.controlnet_x_embedder = zero_module(torch.nn.Linear(in_channels, self.inner_dim))
-
-        self.gradient_checkpointing = False
-
-    @property
-    # Copied from diffusers.models.unets.unet_2d_condition.UNet2DConditionModel.attn_processors
-    def attn_processors(self):
-        r"""
-        Returns:
-            `dict` of attention processors: A dictionary containing all attention processors used in the model with
-            indexed by its weight name.
-        """
-        # set recursively
-        processors = {}
-
-        def fn_recursive_add_processors(name: str, module: torch.nn.Module, processors: Dict[str, AttentionProcessor]):
-            if hasattr(module, "get_processor"):
-                processors[f"{name}.processor"] = module.get_processor()
-
-            for sub_name, child in module.named_children():
-                fn_recursive_add_processors(f"{name}.{sub_name}", child, processors)
-
-            return processors
-
-        for name, module in self.named_children():
-            fn_recursive_add_processors(name, module, processors)
-
-        return processors
-
-    # Copied from diffusers.models.unets.unet_2d_condition.UNet2DConditionModel.set_attn_processor
-    def set_attn_processor(self, processor):
-        r"""
-        Sets the attention processor to use to compute attention.
-
-        Parameters:
-            processor (`dict` of `AttentionProcessor` or only `AttentionProcessor`):
-                The instantiated processor class or a dictionary of processor classes that will be set as the processor
-                for **all** `Attention` layers.
-
-                If `processor` is a dict, the key needs to define the path to the corresponding cross attention
-                processor. This is strongly recommended when setting trainable attention processors.
-
-        """
-        count = len(self.attn_processors.keys())
-
-        if isinstance(processor, dict) and len(processor) != count:
-            raise ValueError(
-                f"A dict of processors was passed, but the number of processors {len(processor)} does not match the"
-                f" number of attention layers: {count}. Please make sure to pass {count} processor classes."
-            )
-
-        def fn_recursive_attn_processor(name: str, module: torch.nn.Module, processor):
-            if hasattr(module, "set_processor"):
-                if not isinstance(processor, dict):
-                    module.set_processor(processor)
-                else:
-                    module.set_processor(processor.pop(f"{name}.processor"))
-
-            for sub_name, child in module.named_children():
-                fn_recursive_attn_processor(f"{name}.{sub_name}", child, processor)
-
-        for name, module in self.named_children():
-            fn_recursive_attn_processor(name, module, processor)
-
-    def _set_gradient_checkpointing(self, module, value=False):
-        if hasattr(module, "gradient_checkpointing"):
-            module.gradient_checkpointing = value
-
-    @classmethod
-    def from_transformer(
-        cls,
-        transformer,
-        num_layers: int = 4,
-        num_single_layers: int = 10,
-        attention_head_dim: int = 128,
-        num_attention_heads: int = 24,
-        load_weights_from_transformer=True,
-    ):
-        config = transformer.config
-        config["num_layers"] = num_layers
-        config["num_single_layers"] = num_single_layers
-        config["attention_head_dim"] = attention_head_dim
-        config["num_attention_heads"] = num_attention_heads
-
-        controlnet = cls(**config)
-
-        if load_weights_from_transformer:
-            controlnet.pos_embed.load_state_dict(transformer.pos_embed.state_dict())
-            controlnet.time_text_embed.load_state_dict(transformer.time_text_embed.state_dict())
-            controlnet.context_embedder.load_state_dict(transformer.context_embedder.state_dict())
-            controlnet.x_embedder.load_state_dict(transformer.x_embedder.state_dict())
-            controlnet.transformer_blocks.load_state_dict(transformer.transformer_blocks.state_dict(), strict=False)
-            controlnet.single_transformer_blocks.load_state_dict(
-                transformer.single_transformer_blocks.state_dict(), strict=False
-            )
-
-            controlnet.controlnet_x_embedder = zero_module(controlnet.controlnet_x_embedder)
-
-        return controlnet
-
-    def forward(
-        self,
-        hidden_states: torch.Tensor,
-        controlnet_cond: torch.Tensor,
-        controlnet_mode: torch.Tensor = None,
-        conditioning_scale: float = 1.0,
-        encoder_hidden_states: torch.Tensor = None,
-        pooled_projections: torch.Tensor = None,
-        timestep: torch.LongTensor = None,
-        img_ids: torch.Tensor = None,
-        txt_ids: torch.Tensor = None,
-        guidance: torch.Tensor = None,
-        joint_attention_kwargs: Optional[Dict[str, Any]] = None,
-        return_dict: bool = True,
-    ) -> Union[torch.FloatTensor, Transformer2DModelOutput]:
-        """
-        The [`FluxTransformer2DModel`] forward method.
-
-        Args:
-            hidden_states (`torch.FloatTensor` of shape `(batch size, channel, height, width)`):
-                Input `hidden_states`.
-            controlnet_cond (`torch.Tensor`):
-                The conditional input tensor of shape `(batch_size, sequence_length, hidden_size)`.
-            controlnet_mode (`torch.Tensor`):
-                The mode tensor of shape `(batch_size, 1)`.
-            conditioning_scale (`float`, defaults to `1.0`):
-                The scale factor for ControlNet outputs.
-            encoder_hidden_states (`torch.FloatTensor` of shape `(batch size, sequence_len, embed_dims)`):
-                Conditional embeddings (embeddings computed from the input conditions such as prompts) to use.
-            pooled_projections (`torch.FloatTensor` of shape `(batch_size, projection_dim)`): Embeddings projected
-                from the embeddings of input conditions.
-            timestep ( `torch.LongTensor`):
-                Used to indicate denoising step.
-            block_controlnet_hidden_states: (`list` of `torch.Tensor`):
-                A list of tensors that if specified are added to the residuals of transformer blocks.
-            joint_attention_kwargs (`dict`, *optional*):
-                A kwargs dictionary that if specified is passed along to the `AttentionProcessor` as defined under
-                `self.processor` in
-                [diffusers.models.attention_processor](https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/attention_processor.py).
-            return_dict (`bool`, *optional*, defaults to `True`):
-                Whether or not to return a [`~models.transformer_2d.Transformer2DModelOutput`] instead of a plain
-                tuple.
-
-        Returns:
-            If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
-            `tuple` where the first element is the sample tensor.
-        """
-        if guidance is not None:
-            print("guidance is not supported in BriaFluxControlNetModel")
-        if pooled_projections is not None:
-            print("pooled_projections is not supported in BriaFluxControlNetModel")
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-        hidden_states = self.x_embedder(hidden_states)
-
-        # add
-        hidden_states = hidden_states + self.controlnet_x_embedder(controlnet_cond)
-
-        timestep = timestep.to(hidden_states.dtype)  # Original code was * 1000
-        if guidance is not None:
-            guidance = guidance.to(hidden_states.dtype)  # Original code was * 1000
-        else:
-            guidance = None
-        # temb = (
-        # self.time_text_embed(timestep, pooled_projections)
-        # if guidance is None
-        # else self.time_text_embed(timestep, guidance, pooled_projections)
-        # )
-        temb = self.time_embed(timestep, dtype=hidden_states.dtype)
-
-        encoder_hidden_states = self.context_embedder(encoder_hidden_states)
-
-        if self.union:
-            # union mode
-            if controlnet_mode is None:
-                raise ValueError("`controlnet_mode` cannot be `None` when applying ControlNet-Union")
-            # union mode emb
-            controlnet_mode_emb = self.controlnet_mode_embedder(controlnet_mode)
-            if controlnet_mode_emb.shape[0] < encoder_hidden_states.shape[0]:
-                controlnet_mode_emb = controlnet_mode_emb.expand(encoder_hidden_states.shape[0], 1, 2048) 
-            encoder_hidden_states = torch.cat([controlnet_mode_emb, encoder_hidden_states], dim=1)
-            txt_ids = torch.cat((txt_ids[:, 0:1, :], txt_ids), dim=1)
-
-        # if txt_ids.ndim == 3:
-        #     logger.warning(
-        #         "Passing `txt_ids` 3d torch.Tensor is deprecated."
-        #         "Please remove the batch dimension and pass it as a 2d torch Tensor"
-        #     )
-        #     txt_ids = txt_ids[0]
-        # if img_ids.ndim == 3:
-        #     logger.warning(
-        #         "Passing `img_ids` 3d torch.Tensor is deprecated."
-        #         "Please remove the batch dimension and pass it as a 2d torch Tensor"
-        #     )
-        #     img_ids = img_ids[0]
-
-        # ids = torch.cat((txt_ids, img_ids), dim=0)
-        ids = torch.cat((txt_ids, img_ids), dim=1)
-        image_rotary_emb = self.pos_embed(ids)
-
-        block_samples = ()
-        for index_block, block in enumerate(self.transformer_blocks):
-            if self.training and self.gradient_checkpointing:
-
-                def create_custom_forward(module, return_dict=None):
-                    def custom_forward(*inputs):
-                        if return_dict is not None:
-                            return module(*inputs, return_dict=return_dict)
-                        else:
-                            return module(*inputs)
-
-                    return custom_forward
-
-                ckpt_kwargs: Dict[str, Any] = {"use_reentrant": False} if is_torch_version(">=", "1.11.0") else {}
-                encoder_hidden_states, hidden_states = torch.utils.checkpoint.checkpoint(
-                    create_custom_forward(block),
-                    hidden_states,
-                    encoder_hidden_states,
-                    temb,
-                    image_rotary_emb,
-                    **ckpt_kwargs,
-                )
-
-            else:
-                encoder_hidden_states, hidden_states = block(
-                    hidden_states=hidden_states,
-                    encoder_hidden_states=encoder_hidden_states,
-                    temb=temb,
-                    image_rotary_emb=image_rotary_emb,
-                )
-            block_samples = block_samples + (hidden_states,)
-
-        hidden_states = torch.cat([encoder_hidden_states, hidden_states], dim=1)
-
-        single_block_samples = ()
-        for index_block, block in enumerate(self.single_transformer_blocks):
-            if self.training and self.gradient_checkpointing:
-
-                def create_custom_forward(module, return_dict=None):
-                    def custom_forward(*inputs):
-                        if return_dict is not None:
-                            return module(*inputs, return_dict=return_dict)
-                        else:
-                            return module(*inputs)
-
-                    return custom_forward
-
-                ckpt_kwargs: Dict[str, Any] = {"use_reentrant": False} if is_torch_version(">=", "1.11.0") else {}
-                hidden_states = torch.utils.checkpoint.checkpoint(
-                    create_custom_forward(block),
-                    hidden_states,
-                    temb,
-                    image_rotary_emb,
-                    **ckpt_kwargs,
-                )
-
-            else:
-                hidden_states = block(
-                    hidden_states=hidden_states,
-                    temb=temb,
-                    image_rotary_emb=image_rotary_emb,
-                )
-            single_block_samples = single_block_samples + (hidden_states[:, encoder_hidden_states.shape[1] :],)
-
-        # controlnet block
-        controlnet_block_samples = ()
-        for block_sample, controlnet_block in zip(block_samples, self.controlnet_blocks):
-            block_sample = controlnet_block(block_sample)
-            controlnet_block_samples = controlnet_block_samples + (block_sample,)
-
-        controlnet_single_block_samples = ()
-        for single_block_sample, controlnet_block in zip(single_block_samples, self.controlnet_single_blocks):
-            single_block_sample = controlnet_block(single_block_sample)
-            controlnet_single_block_samples = controlnet_single_block_samples + (single_block_sample,)
-
-        # scaling
-        controlnet_block_samples = [sample * conditioning_scale for sample in controlnet_block_samples]
-        controlnet_single_block_samples = [sample * conditioning_scale for sample in controlnet_single_block_samples]
-
-        controlnet_block_samples = None if len(controlnet_block_samples) == 0 else controlnet_block_samples
-        controlnet_single_block_samples = (
-            None if len(controlnet_single_block_samples) == 0 else controlnet_single_block_samples
-        )
-
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
-        if not return_dict:
-            return (controlnet_block_samples, controlnet_single_block_samples)
-
-        return FluxControlNetOutput(
-            controlnet_block_samples=controlnet_block_samples,
-            controlnet_single_block_samples=controlnet_single_block_samples,
-        )
-
-
-class FluxMultiControlNetModel(ModelMixin):
-    r"""
-    `FluxMultiControlNetModel` wrapper class for Multi-FluxControlNetModel
-
-    This module is a wrapper for multiple instances of the `FluxControlNetModel`. The `forward()` API is designed to be
-    compatible with `FluxControlNetModel`.
-
-    Args:
-        controlnets (`List[FluxControlNetModel]`):
-            Provides additional conditioning to the unet during the denoising process. You must set multiple
-            `FluxControlNetModel` as a list.
-    """
-
-    def __init__(self, controlnets):
-        super().__init__()
-        self.nets = nn.ModuleList(controlnets)
-
-    def forward(
-        self,
-        hidden_states: torch.FloatTensor,
-        controlnet_cond: List[torch.tensor],
-        controlnet_mode: List[torch.tensor],
-        conditioning_scale: List[float],
-        encoder_hidden_states: torch.Tensor = None,
-        pooled_projections: torch.Tensor = None,
-        timestep: torch.LongTensor = None,
-        img_ids: torch.Tensor = None,
-        txt_ids: torch.Tensor = None,
-        guidance: torch.Tensor = None,
-        joint_attention_kwargs: Optional[Dict[str, Any]] = None,
-        return_dict: bool = True,
-    ) -> Union[FluxControlNetOutput, Tuple]:
-        # ControlNet-Union with multiple conditions
-        # only load one ControlNet for saving memories
-        if len(self.nets) == 1 and self.nets[0].union:
-            controlnet = self.nets[0]
-
-            for i, (image, mode, scale) in enumerate(zip(controlnet_cond, controlnet_mode, conditioning_scale)):
-                block_samples, single_block_samples = controlnet(
-                    hidden_states=hidden_states,
-                    controlnet_cond=image,
-                    controlnet_mode=mode[:, None],
-                    conditioning_scale=scale,
-                    timestep=timestep,
-                    guidance=guidance,
-                    pooled_projections=pooled_projections,
-                    encoder_hidden_states=encoder_hidden_states,
-                    txt_ids=txt_ids,
-                    img_ids=img_ids,
-                    joint_attention_kwargs=joint_attention_kwargs,
-                    return_dict=return_dict,
-                )
-
-                # merge samples
-                if i == 0:
-                    control_block_samples = block_samples
-                    control_single_block_samples = single_block_samples
-                else:
-                    control_block_samples = [
-                        control_block_sample + block_sample
-                        for control_block_sample, block_sample in zip(control_block_samples, block_samples)
-                    ]
-
-                    control_single_block_samples = [
-                        control_single_block_sample + block_sample
-                        for control_single_block_sample, block_sample in zip(
-                            control_single_block_samples, single_block_samples
-                        )
-                    ]
-
-        # Regular Multi-ControlNets
-        # load all ControlNets into memories
-        else:
-            for i, (image, mode, scale, controlnet) in enumerate(
-                zip(controlnet_cond, controlnet_mode, conditioning_scale, self.nets)
-            ):
-                block_samples, single_block_samples = controlnet(
-                    hidden_states=hidden_states,
-                    controlnet_cond=image,
-                    controlnet_mode=mode[:, None],
-                    conditioning_scale=scale,
-                    timestep=timestep,
-                    guidance=guidance,
-                    pooled_projections=pooled_projections,
-                    encoder_hidden_states=encoder_hidden_states,
-                    txt_ids=txt_ids,
-                    img_ids=img_ids,
-                    joint_attention_kwargs=joint_attention_kwargs,
-                    return_dict=return_dict,
-                )
-
-                # merge samples
-                if i == 0:
-                    control_block_samples = block_samples
-                    control_single_block_samples = single_block_samples
-                else:
-                    if block_samples is not None and control_block_samples is not None:
-                        control_block_samples = [
-                            control_block_sample + block_sample
-                            for control_block_sample, block_sample in zip(control_block_samples, block_samples)
-                        ]
-                    if single_block_samples is not None and control_single_block_samples is not None:
-                        control_single_block_samples = [
-                            control_single_block_sample + block_sample
-                            for control_single_block_sample, block_sample in zip(
-                                control_single_block_samples, single_block_samples
-                            )
-                        ]
-
-        return control_block_samples, control_single_block_samples
-
-
-
-class FluxMultiControlNetModel(ModelMixin):
-    r"""
-    `FluxMultiControlNetModel` wrapper class for Multi-FluxControlNetModel
-
-    This module is a wrapper for multiple instances of the `FluxControlNetModel`. The `forward()` API is designed to be
-    compatible with `FluxControlNetModel`.
-
-    Args:
-        controlnets (`List[FluxControlNetModel]`):
-            Provides additional conditioning to the unet during the denoising process. You must set multiple
-            `FluxControlNetModel` as a list.
-    """
-
-    def __init__(self, controlnets):
-        super().__init__()
-        self.nets = nn.ModuleList(controlnets)
-
-    def forward(
-        self,
-        hidden_states: torch.FloatTensor,
-        controlnet_cond: List[torch.tensor],
-        controlnet_mode: List[torch.tensor],
-        conditioning_scale: List[float],
-        encoder_hidden_states: torch.Tensor = None,
-        pooled_projections: torch.Tensor = None,
-        timestep: torch.LongTensor = None,
-        img_ids: torch.Tensor = None,
-        txt_ids: torch.Tensor = None,
-        guidance: torch.Tensor = None,
-        joint_attention_kwargs: Optional[Dict[str, Any]] = None,
-        return_dict: bool = True,
-    ) -> Union[FluxControlNetOutput, Tuple]:
-        # ControlNet-Union with multiple conditions
-        # only load one ControlNet for saving memories
-        if len(self.nets) == 1 and self.nets[0].union:
-            controlnet = self.nets[0]
-
-            for i, (image, mode, scale) in enumerate(zip(controlnet_cond, controlnet_mode, conditioning_scale)):
-                block_samples, single_block_samples = controlnet(
-                    hidden_states=hidden_states,
-                    controlnet_cond=image,
-                    controlnet_mode=mode[:, None],
-                    conditioning_scale=scale,
-                    timestep=timestep,
-                    guidance=guidance,
-                    pooled_projections=pooled_projections,
-                    encoder_hidden_states=encoder_hidden_states,
-                    txt_ids=txt_ids,
-                    img_ids=img_ids,
-                    joint_attention_kwargs=joint_attention_kwargs,
-                    return_dict=return_dict,
-                )
-
-                # merge samples
-                if i == 0:
-                    control_block_samples = block_samples
-                    control_single_block_samples = single_block_samples
-                else:
-                    control_block_samples = [
-                        control_block_sample + block_sample
-                        for control_block_sample, block_sample in zip(control_block_samples, block_samples)
-                    ]
-
-                    control_single_block_samples = [
-                        control_single_block_sample + block_sample
-                        for control_single_block_sample, block_sample in zip(
-                            control_single_block_samples, single_block_samples
-                        )
-                    ]
-
-        # Regular Multi-ControlNets
-        # load all ControlNets into memories
-        else:
-            for i, (image, mode, scale, controlnet) in enumerate(
-                zip(controlnet_cond, controlnet_mode, conditioning_scale, self.nets)
-            ):
-                block_samples, single_block_samples = controlnet(
-                    hidden_states=hidden_states,
-                    controlnet_cond=image,
-                    controlnet_mode=mode[:, None],
-                    conditioning_scale=scale,
-                    timestep=timestep,
-                    guidance=guidance,
-                    pooled_projections=pooled_projections,
-                    encoder_hidden_states=encoder_hidden_states,
-                    txt_ids=txt_ids,
-                    img_ids=img_ids,
-                    joint_attention_kwargs=joint_attention_kwargs,
-                    return_dict=return_dict,
-                )
-
-                # merge samples
-                if i == 0:
-                    control_block_samples = block_samples
-                    control_single_block_samples = single_block_samples
-                else:
-                    if block_samples is not None and control_block_samples is not None:
-                        control_block_samples = [
-                            control_block_sample + block_sample
-                            for control_block_sample, block_sample in zip(control_block_samples, block_samples)
-                        ]
-                    if single_block_samples is not None and control_single_block_samples is not None:
-                        control_single_block_samples = [
-                            control_single_block_sample + block_sample
-                            for control_single_block_sample, block_sample in zip(
-                                control_single_block_samples, single_block_samples
-                            )
-                        ]
-
-        return control_block_samples, control_single_block_samples