''' * Copyright (c) 2023 Salesforce, Inc. * All rights reserved. * SPDX-License-Identifier: Apache License 2.0 * For full license text, see LICENSE.txt file in the repo root or http://www.apache.org/licenses/ * By Can Qin * Modified from ControlNet repo: https://github.com/lllyasviel/ControlNet * Copyright (c) 2023 Lvmin Zhang and Maneesh Agrawala ''' import einops import torch import torch as th import torch.nn as nn from lib.util import ( conv_nd, linear, zero_module, timestep_embedding, ) from einops import rearrange, repeat from torchvision.utils import make_grid from lib.attention import SpatialTransformer from lib.openaimodel import UNetModel, TimestepEmbedSequential, ResBlock, Downsample, AttentionBlock from lib.ddpm_multi import LatentDiffusion from utils import log_txt_as_img, exists, instantiate_from_config from lib.ddim_multi import DDIMSampler def modulated_conv2d( x, # Input tensor: [batch_size, in_channels, in_height, in_width] w, # Weight tensor: [out_channels, in_channels, kernel_height, kernel_width] s, # Style tensor: [batch_size, in_channels] demodulate = False, # Apply weight demodulation? padding = 0, # Padding: int or [padH, padW] input_gain = None, # Optional scale factors for the input channels: [], [in_channels], or [batch_size, in_channels] bias=None, stride=1, dilation=1 ): """ https://github.com/NVlabs/stylegan3/blob/407db86e6fe432540a22515310188288687858fa/training/networks_stylegan3.py """ # with misc.suppress_tracer_warnings(): # this value will be treated as a constant batch_size = int(x.shape[0]) out_channels, in_channels, kh, kw = w.shape # Modulate weights. w = w.unsqueeze(0) # [NOIkk] w = (w * s.unsqueeze(1).unsqueeze(3).unsqueeze(4)) # [NOIkk] # Execute as one fused op using grouped convolution. x = x.reshape(1, -1, *x.shape[2:]) w = w.reshape(-1, in_channels, kh, kw) x = torch.nn.functional.conv2d(input=x, weight=w.to(x.dtype), bias=bias, stride=stride, padding=padding, dilation=dilation, groups=batch_size) x = x.reshape(batch_size, -1, *x.shape[2:]) return x class ControlledUnetModel(UNetModel): def forward(self, x, timesteps=None, context=None, control=None, only_mid_control=False, **kwargs): hs = [] with torch.no_grad(): t_emb = timestep_embedding(timesteps, self.model_channels, repeat_only=False) emb = self.time_embed(t_emb) h = x.type(self.dtype) for module in self.input_blocks: h = module(h, emb, context) hs.append(h) h = self.middle_block(h, emb, context) if control is not None: h += control.pop() for i, module in enumerate(self.output_blocks): if only_mid_control or control is None: h = torch.cat([h, hs.pop()], dim=1) else: h = torch.cat([h, hs.pop() + control.pop()], dim=1) h = module(h, emb, context) h = h.type(x.dtype) return self.out(h) class ControlNet(nn.Module): def __init__( self, image_size, in_channels, model_channels, hint_channels, num_res_blocks, attention_resolutions, dropout=0, channel_mult=(1, 2, 4, 8), conv_resample=True, dims=2, use_checkpoint=False, use_fp16=False, num_heads=-1, num_head_channels=-1, num_heads_upsample=-1, use_scale_shift_norm=False, resblock_updown=False, use_new_attention_order=False, use_spatial_transformer=False, # custom transformer support transformer_depth=1, # custom transformer support context_dim=None, # custom transformer support n_embed=None, # custom support for prediction of discrete ids into codebook of first stage vq model legacy=True, disable_self_attentions=None, num_attention_blocks=None, disable_middle_self_attn=False, use_linear_in_transformer=False, all_tasks_num = 13, ): super().__init__() if use_spatial_transformer: assert context_dim is not None, 'Fool!! You forgot to include the dimension of your cross-attention conditioning...' if context_dim is not None: assert use_spatial_transformer, 'Fool!! You forgot to use the spatial transformer for your cross-attention conditioning...' from omegaconf.listconfig import ListConfig if type(context_dim) == ListConfig: context_dim = list(context_dim) if num_heads_upsample == -1: num_heads_upsample = num_heads if num_heads == -1: assert num_head_channels != -1, 'Either num_heads or num_head_channels has to be set' if num_head_channels == -1: assert num_heads != -1, 'Either num_heads or num_head_channels has to be set' self.all_tasks_num = all_tasks_num self.tasks_to_id = {"control_hed":0, "control_canny":1, "control_seg":2, "control_depth":3, "control_normal":4,"control_openpose":5, "control_img":6, "control_hedsketch":7, "control_bbox":8, "control_outpainting":9, "control_grayscale":10, "control_blur":11, "control_inpainting":12} self.dims = dims self.image_size = image_size self.in_channels = in_channels self.model_channels = model_channels if isinstance(num_res_blocks, int): self.num_res_blocks = len(channel_mult) * [num_res_blocks] else: if len(num_res_blocks) != len(channel_mult): raise ValueError("provide num_res_blocks either as an int (globally constant) or " "as a list/tuple (per-level) with the same length as channel_mult") self.num_res_blocks = num_res_blocks if disable_self_attentions is not None: # should be a list of booleans, indicating whether to disable self-attention in TransformerBlocks or not assert len(disable_self_attentions) == len(channel_mult) if num_attention_blocks is not None: assert len(num_attention_blocks) == len(self.num_res_blocks) assert all(map(lambda i: self.num_res_blocks[i] >= num_attention_blocks[i], range(len(num_attention_blocks)))) print(f"Constructor of UNetModel received num_attention_blocks={num_attention_blocks}. " f"This option has LESS priority than attention_resolutions {attention_resolutions}, " f"i.e., in cases where num_attention_blocks[i] > 0 but 2**i not in attention_resolutions, " f"attention will still not be set.") self.attention_resolutions = attention_resolutions self.dropout = dropout self.channel_mult = channel_mult self.conv_resample = conv_resample self.use_checkpoint = use_checkpoint self.dtype = th.float16 if use_fp16 else th.float32 self.num_heads = num_heads self.num_head_channels = num_head_channels self.num_heads_upsample = num_heads_upsample self.predict_codebook_ids = n_embed is not None time_embed_dim = model_channels * 4 self.time_embed = nn.Sequential( linear(model_channels, time_embed_dim), nn.SiLU(), linear(time_embed_dim, time_embed_dim), ) self.task_id_hypernet = nn.Sequential( linear(768, time_embed_dim), # model_channels or 768 nn.SiLU(), linear(time_embed_dim, time_embed_dim), nn.SiLU(), ) self.task_id_layernet = [] self.input_blocks = nn.ModuleList( [ TimestepEmbedSequential( conv_nd(dims, in_channels, model_channels, 3, padding=1) ) ] ) self.task_id_layernet.append(linear(time_embed_dim, model_channels)) self.zero_convs = nn.ModuleList([self.make_zero_conv(model_channels)]) # ie, model_channels -> 320 self.input_hint_block_list_moe = nn.ModuleList([TimestepEmbedSequential( conv_nd(dims, hint_channels, 16, 3, padding=1), nn.SiLU(), conv_nd(dims, 16, 16, 3, padding=1), nn.SiLU(), conv_nd(dims, 16, 32, 3, padding=1, stride=2), nn.SiLU() ) for _ in range( self.all_tasks_num)]) self.input_hint_block_zeroconv_0 = nn.ModuleList([zero_module(conv_nd(dims, 32, 32, 3, padding=1)),zero_module(conv_nd(dims, 32, 32, 3, padding=1))]) self.task_id_layernet_zeroconv_0 = linear(time_embed_dim, 32) self.input_hint_block_share = TimestepEmbedSequential( conv_nd(dims, 32, 32, 3, padding=1), nn.SiLU(), conv_nd(dims, 32, 96, 3, padding=1, stride=2), nn.SiLU(), conv_nd(dims, 96, 96, 3, padding=1), nn.SiLU(), conv_nd(dims, 96, 256, 3, padding=1, stride=2), nn.SiLU(), ) self.input_hint_block_zeroconv_1 = nn.ModuleList([zero_module(conv_nd(dims, 256, model_channels, 3, padding=1)),zero_module(conv_nd(dims, 256, model_channels, 3, padding=1)) ]) self.task_id_layernet_zeroconv_1 = linear(time_embed_dim, 256) self._feature_size = model_channels input_block_chans = [model_channels] ch = model_channels ds = 1 for level, mult in enumerate(channel_mult): for nr in range(self.num_res_blocks[level]): layers = [ ResBlock( ch, time_embed_dim, dropout, out_channels=mult * model_channels, dims=dims, use_checkpoint=use_checkpoint, use_scale_shift_norm=use_scale_shift_norm, ) ] ch = mult * model_channels if ds in attention_resolutions: if num_head_channels == -1: dim_head = ch // num_heads else: num_heads = ch // num_head_channels dim_head = num_head_channels if legacy: # num_heads = 1 dim_head = ch // num_heads if use_spatial_transformer else num_head_channels if exists(disable_self_attentions): disabled_sa = disable_self_attentions[level] else: disabled_sa = False if not exists(num_attention_blocks) or nr < num_attention_blocks[level]: layers.append( AttentionBlock( ch, use_checkpoint=use_checkpoint, num_heads=num_heads, num_head_channels=dim_head, use_new_attention_order=use_new_attention_order, ) if not use_spatial_transformer else SpatialTransformer( ch, num_heads, dim_head, depth=transformer_depth, context_dim=context_dim, disable_self_attn=disabled_sa, use_linear=use_linear_in_transformer, use_checkpoint=use_checkpoint ) ) self.input_blocks.append(TimestepEmbedSequential(*layers)) self.task_id_layernet.append(linear(time_embed_dim, ch)) self.zero_convs.append(self.make_zero_conv(ch)) self._feature_size += ch input_block_chans.append(ch) if level != len(channel_mult) - 1: out_ch = ch self.input_blocks.append( TimestepEmbedSequential( ResBlock( ch, time_embed_dim, dropout, out_channels=out_ch, dims=dims, use_checkpoint=use_checkpoint, use_scale_shift_norm=use_scale_shift_norm, down=True, ) if resblock_updown else Downsample( ch, conv_resample, dims=dims, out_channels=out_ch ) ) ) ch = out_ch input_block_chans.append(ch) self.task_id_layernet.append(linear(time_embed_dim, ch)) self.zero_convs.append(self.make_zero_conv(ch)) ds *= 2 self._feature_size += ch if num_head_channels == -1: dim_head = ch // num_heads else: num_heads = ch // num_head_channels dim_head = num_head_channels if legacy: dim_head = ch // num_heads if use_spatial_transformer else num_head_channels self.middle_block = TimestepEmbedSequential( ResBlock( ch, time_embed_dim, dropout, dims=dims, use_checkpoint=use_checkpoint, use_scale_shift_norm=use_scale_shift_norm, ), AttentionBlock( ch, use_checkpoint=use_checkpoint, num_heads=num_heads, num_head_channels=dim_head, use_new_attention_order=use_new_attention_order, ) if not use_spatial_transformer else SpatialTransformer( # always uses a self-attn ch, num_heads, dim_head, depth=transformer_depth, context_dim=context_dim, disable_self_attn=disable_middle_self_attn, use_linear=use_linear_in_transformer, use_checkpoint=use_checkpoint ), ResBlock( ch, time_embed_dim, dropout, dims=dims, use_checkpoint=use_checkpoint, use_scale_shift_norm=use_scale_shift_norm, ), ) self.middle_block_out = self.make_zero_conv(ch) self._feature_size += ch self.task_id_layernet = nn.ModuleList(self.task_id_layernet) def make_zero_conv(self, channels): return TimestepEmbedSequential(zero_module(conv_nd(self.dims, channels, channels, 1, padding=0))) def forward(self, x, hint, timesteps, context, **kwargs): ''' x -> 4,4,64,64 hint -> 4, 3, 512, 512 context - > 4, 77, 768 ''' BS_Real = x.shape[0] if kwargs is not None: task_name = kwargs['task']['name'] task_id = self.tasks_to_id[task_name] task_feature = kwargs['task']['feature'] task_id_emb = self.task_id_hypernet(task_feature.squeeze(0)) t_emb = timestep_embedding(timesteps, self.model_channels, repeat_only=False) emb = self.time_embed(t_emb) guided_hint = self.input_hint_block_list_moe[task_id](hint, emb, context) guided_hint = modulated_conv2d(guided_hint, self.input_hint_block_zeroconv_0[0].weight, self.task_id_layernet_zeroconv_0(task_id_emb).repeat(BS_Real, 1).detach(), padding=1) guided_hint += self.input_hint_block_zeroconv_0[0].bias.unsqueeze(0).unsqueeze(2).unsqueeze(3) guided_hint = self.input_hint_block_share(guided_hint, emb, context) guided_hint = modulated_conv2d(guided_hint, self.input_hint_block_zeroconv_1[0].weight, self.task_id_layernet_zeroconv_1(task_id_emb).repeat(BS_Real, 1).detach(), padding=1) guided_hint += self.input_hint_block_zeroconv_1[0].bias.unsqueeze(0).unsqueeze(2).unsqueeze(3) outs = [] h = x.type(self.dtype) for module, zero_conv, task_hyperlayer in zip(self.input_blocks, self.zero_convs, self.task_id_layernet): if guided_hint is not None: h = module(h, emb, context) try: h += guided_hint except RuntimeError: pdb.set_trace() guided_hint = None else: h = module(h, emb, context) outs.append(modulated_conv2d(h, zero_conv[0].weight, task_hyperlayer(task_id_emb).repeat(BS_Real, 1).detach()) + zero_conv[0].bias.unsqueeze(0).unsqueeze(2).unsqueeze(3)) h = self.middle_block(h, emb, context) outs.append(self.middle_block_out(h, emb, context)) return outs class ControlLDM(LatentDiffusion): def __init__(self, control_stage_config, control_key, only_mid_control, *args, **kwargs): super().__init__(*args, **kwargs) self.mapping_task = {"control_hed": "hed edge to image", "control_canny": "canny edge to image", "control_seg": "segmentation map to image", "control_depth": "depth map to image", "control_normal": "normal surface map to image", "control_img": "image editing", "control_openpose": "human pose skeleton to image", "control_hedsketch": "sketch to image", "control_bbox": "bounding box to image", "control_outpainting": "image outpainting", "control_grayscale": "gray image to color image", "control_blur": "deblur image to clean image", "control_inpainting": "image inpainting"} self.all_tasks_num = len(self.mapping_task) self.task_loss_ema = torch.zeros(self.all_tasks_num,) self.control_model = instantiate_from_config(control_stage_config) # -> ControlNet self.control_key = control_key self.only_mid_control = only_mid_control self.control_scales = [1.0] * 13 @torch.no_grad() def get_input(self, batch, k, bs=None, *args, **kwargs): ''' self -> ControlLDM( (model): DiffusionWrapper( (diffusion_model): ControlledUnetModel(...) (first_stage_model): AutoencoderKL(...) (cond_stage_model): FrozenCLIPEmbedder(...) (control_model): ControlNet(...) batch - > dict('jpg', 'txt', 'hint', 'task') ''' task_name = batch['task'][0] # one task for one batch BS = len(batch['task']) batch['txt'] = batch['txt'] + [self.mapping_task[task_name]] x, c_all = super().get_input(batch, self.first_stage_key, *args, **kwargs) c, c_task = c_all[:BS,:,:], c_all[BS:,:1,:] control = batch[self.control_key] if bs is not None: control = control[:bs] control = control.to(self.device) control = einops.rearrange(control, 'b h w c -> b c h w') control = control.to(memory_format=torch.contiguous_format).float() task_dic = {} task_dic['name'] = task_name task_dic['feature'] = c_task return x, dict(c_crossattn=[c], c_concat=[control], task=task_dic) def apply_model(self, x_noisy, t, cond, *args, **kwargs): assert isinstance(cond, dict) task_name = cond['task'] # dict['name', 'feature'] diffusion_model = self.model.diffusion_model # -> ControlledUnetModel cond_txt = torch.cat(cond['c_crossattn'], 1) if cond['c_concat'] is None: eps = diffusion_model(x=x_noisy, timesteps=t, context=cond_txt, control=None, only_mid_control=self.only_mid_control) else: control = self.control_model(x=x_noisy, hint=torch.cat(cond['c_concat'], 1), timesteps=t, context=cond_txt, task=task_name) control = [c * scale for c, scale in zip(control, self.control_scales)] eps = diffusion_model(x=x_noisy, timesteps=t, context=cond_txt, control=control, only_mid_control=self.only_mid_control) return eps @torch.no_grad() def get_unconditional_conditioning(self, N): return self.get_learned_conditioning([""] * N) @torch.no_grad() def log_images(self, batch, N=4, n_row=2, sample=False, ddim_steps=50, ddim_eta=0.0, return_keys=None, quantize_denoised=True, inpaint=True, plot_denoise_rows=False, plot_progressive_rows=True, plot_diffusion_rows=False, unconditional_guidance_scale=9.0, unconditional_guidance_label=None, use_ema_scope=True, **kwargs): use_ddim = ddim_steps is not None log = dict() task_name = batch['task'][0] # one task for one batch z, c = self.get_input(batch, self.first_stage_key, bs=N) task_dic = c['task'] c_cat, c = c["c_concat"][0][:N], c["c_crossattn"][0][:N] N = min(z.shape[0], N) n_row = min(z.shape[0], n_row) log["reconstruction"] = self.decode_first_stage(z) log["control"] = c_cat * 2.0 - 1.0 log["conditioning"] = log_txt_as_img((512, 512), batch[self.cond_stage_key], size=16) if plot_diffusion_rows: # get diffusion row diffusion_row = list() z_start = z[:n_row] for t in range(self.num_timesteps): if t % self.log_every_t == 0 or t == self.num_timesteps - 1: t = repeat(torch.tensor([t]), '1 -> b', b=n_row) t = t.to(self.device).long() noise = torch.randn_like(z_start) z_noisy = self.q_sample(x_start=z_start, t=t, noise=noise) diffusion_row.append(self.decode_first_stage(z_noisy)) diffusion_row = torch.stack(diffusion_row) # n_log_step, n_row, C, H, W diffusion_grid = rearrange(diffusion_row, 'n b c h w -> b n c h w') diffusion_grid = rearrange(diffusion_grid, 'b n c h w -> (b n) c h w') diffusion_grid = make_grid(diffusion_grid, nrow=diffusion_row.shape[0]) log["diffusion_row"] = diffusion_grid if sample: # get denoise row samples, z_denoise_row = self.sample_log(cond={"c_concat": [c_cat], "c_crossattn": [c]}, batch_size=N, ddim=use_ddim, ddim_steps=ddim_steps, eta=ddim_eta) x_samples = self.decode_first_stage(samples) log["samples"] = x_samples if plot_denoise_rows: denoise_grid = self._get_denoise_row_from_list(z_denoise_row) log["denoise_row"] = denoise_grid if unconditional_guidance_scale > 1.0: uc_cross = self.get_unconditional_conditioning(N) uc_cat = c_cat # torch.zeros_like(c_cat) uc_full = {"c_concat": [uc_cat], "c_crossattn": [uc_cross]} samples_cfg, _ = self.sample_log(cond={"c_concat": [c_cat], "c_crossattn": [c], 'task': task_dic}, batch_size=N, ddim=use_ddim, ddim_steps=ddim_steps, eta=ddim_eta, unconditional_guidance_scale=unconditional_guidance_scale, unconditional_conditioning=uc_full, ) x_samples_cfg = self.decode_first_stage(samples_cfg) log[f"samples_cfg_scale_{unconditional_guidance_scale:.2f}"] = x_samples_cfg return log @torch.no_grad() def log_images_infer(self, batch, N=4, n_row=2, sample=False, ddim_steps=50, ddim_eta=0.0, return_keys=None, quantize_denoised=True, inpaint=True, plot_denoise_rows=False, plot_progressive_rows=True, plot_diffusion_rows=False, unconditional_guidance_scale=9.0, unconditional_guidance_label=None, use_ema_scope=True, **kwargs): use_ddim = ddim_steps is not None log = dict() task_name = batch['task'][0] # one task for one batch z, c = self.get_input(batch, self.first_stage_key, bs=N) task_dic = c['task'] c_cat, c = c["c_concat"][0][:N], c["c_crossattn"][0][:N] N = min(z.shape[0], N) n_row = min(z.shape[0], n_row) uc_cross = self.get_unconditional_conditioning(N) uc_cat = c_cat # torch.zeros_like(c_cat) uc_full = {"c_concat": [uc_cat], "c_crossattn": [uc_cross]} samples_cfg, _ = self.sample_log(cond={"c_concat": [c_cat], "c_crossattn": [c], 'task': task_dic}, batch_size=N, ddim=use_ddim, ddim_steps=ddim_steps, eta=ddim_eta, unconditional_guidance_scale=unconditional_guidance_scale, unconditional_conditioning=uc_full, ) x_samples_cfg = self.decode_first_stage(samples_cfg) log[f"samples_cfg_scale_{unconditional_guidance_scale:.2f}"] = x_samples_cfg return log @torch.no_grad() def sample_log(self, cond, batch_size, ddim, ddim_steps, **kwargs): ddim_sampler = DDIMSampler(self) b, c, h, w = cond["c_concat"][0].shape shape = (self.channels, h // 8, w // 8) samples, intermediates = ddim_sampler.sample(ddim_steps, batch_size, shape, cond, verbose=False, **kwargs) return samples, intermediates def configure_optimizers(self): lr = self.learning_rate params = list(self.control_model.parameters()) if not self.sd_locked: params += list(self.model.diffusion_model.output_blocks.parameters()) params += list(self.model.diffusion_model.out.parameters()) opt = torch.optim.AdamW(params, lr=lr) return opt def low_vram_shift(self, is_diffusing): if is_diffusing: self.model = self.model.cuda() self.control_model = self.control_model.cuda() self.first_stage_model = self.first_stage_model.cpu() self.cond_stage_model = self.cond_stage_model.cpu() else: self.model = self.model.cpu() self.control_model = self.control_model.cpu() self.first_stage_model = self.first_stage_model.cuda() self.cond_stage_model = self.cond_stage_model.cuda()