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Commit 26ea58d4 authored by patil-suraj's avatar patil-suraj
Browse files

Merge branch 'main' of https://github.com/huggingface/diffusers into main

parents d1fb3093 4261c3aa
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Makefile
View file @ 26ea58d4
...@@ -34,13 +34,9 @@ autogenerate_code: deps_table_update ...@@ -34,13 +34,9 @@ autogenerate_code: deps_table_update
# Check that the repo is in a good state # Check that the repo is in a good state
repo-consistency: repo-consistency:
python utils/check_copies.py
python utils/check_table.py
python utils/check_dummies.py python utils/check_dummies.py
python utils/check_repo.py python utils/check_repo.py
python utils/check_inits.py python utils/check_inits.py
python utils/check_config_docstrings.py
python utils/tests_fetcher.py --sanity_check
# this target runs checks on all files # this target runs checks on all files
...@@ -48,14 +44,13 @@ quality: ...@@ -48,14 +44,13 @@ quality:
black --check --preview $(check_dirs) black --check --preview $(check_dirs)
isort --check-only $(check_dirs) isort --check-only $(check_dirs)
flake8 $(check_dirs) flake8 $(check_dirs)
doc-builder style src/transformers docs/source --max_len 119 --check_only --path_to_docs docs/source doc-builder style src/diffusers docs/source --max_len 119 --check_only --path_to_docs docs/source
# Format source code automatically and check is there are any problems left that need manual fixing # Format source code automatically and check is there are any problems left that need manual fixing
extra_style_checks: extra_style_checks:
python utils/custom_init_isort.py python utils/custom_init_isort.py
python utils/sort_auto_mappings.py doc-builder style src/diffusers docs/source --max_len 119 --path_to_docs docs/source
doc-builder style src/transformers docs/source --max_len 119 --path_to_docs docs/source
# this target runs checks on all files and potentially modifies some of them # this target runs checks on all files and potentially modifies some of them
...@@ -73,8 +68,6 @@ fixup: modified_only_fixup extra_style_checks autogenerate_code repo-consistency ...@@ -73,8 +68,6 @@ fixup: modified_only_fixup extra_style_checks autogenerate_code repo-consistency
fix-copies: fix-copies:
python utils/check_dummies.py --fix_and_overwrite python utils/check_dummies.py --fix_and_overwrite
python utils/check_table.py --fix_and_overwrite
python utils/check_copies.py --fix_and_overwrite
# Run tests for the library # Run tests for the library
......
examples/experimental/train_glide_text_to_image.py 0 → 100644
View file @ 26ea58d4
import argparse
import os
import torch
import torch.nn.functional as F
import bitsandbytes as bnb
import PIL.Image
from accelerate import Accelerator
from datasets import load_dataset
from diffusers import DDPMScheduler, Glide, GlideUNetModel
from diffusers.hub_utils import init_git_repo, push_to_hub
from diffusers.optimization import get_scheduler
from diffusers.utils import logging
from torchvision.transforms import (
CenterCrop,
Compose,
InterpolationMode,
Normalize,
RandomHorizontalFlip,
Resize,
ToTensor,
)
from tqdm.auto import tqdm
logger = logging.get_logger(__name__)
def main(args):
accelerator = Accelerator(mixed_precision=args.mixed_precision)
pipeline = Glide.from_pretrained("fusing/glide-base")
model = pipeline.text_unet
noise_scheduler = DDPMScheduler(timesteps=1000, tensor_format="pt")
optimizer = bnb.optim.Adam8bit(model.parameters(), lr=args.lr)
augmentations = Compose(
[
Resize(args.resolution, interpolation=InterpolationMode.BILINEAR),
CenterCrop(args.resolution),
RandomHorizontalFlip(),
ToTensor(),
Normalize([0.5], [0.5]),
]
)
dataset = load_dataset(args.dataset, split="train")
text_encoder = pipeline.text_encoder.eval()
def transforms(examples):
images = [augmentations(image.convert("RGB")) for image in examples["image"]]
text_inputs = pipeline.tokenizer(examples["caption"], padding="max_length", max_length=77, return_tensors="pt")
text_inputs = text_inputs.input_ids.to(accelerator.device)
with torch.no_grad():
text_embeddings = accelerator.unwrap_model(text_encoder)(text_inputs).last_hidden_state
return {"images": images, "text_embeddings": text_embeddings}
dataset.set_transform(transforms)
train_dataloader = torch.utils.data.DataLoader(dataset, batch_size=args.batch_size, shuffle=True)
lr_scheduler = get_scheduler(
"linear",
optimizer=optimizer,
num_warmup_steps=args.warmup_steps,
num_training_steps=(len(train_dataloader) * args.num_epochs) // args.gradient_accumulation_steps,
)
model, text_encoder, optimizer, train_dataloader, lr_scheduler = accelerator.prepare(
model, text_encoder, optimizer, train_dataloader, lr_scheduler
)
if args.push_to_hub:
repo = init_git_repo(args, at_init=True)
# Train!
is_distributed = torch.distributed.is_available() and torch.distributed.is_initialized()
world_size = torch.distributed.get_world_size() if is_distributed else 1
total_train_batch_size = args.batch_size * args.gradient_accumulation_steps * world_size
max_steps = len(train_dataloader) // args.gradient_accumulation_steps * args.num_epochs
logger.info("***** Running training *****")
logger.info(f" Num examples = {len(train_dataloader.dataset)}")
logger.info(f" Num Epochs = {args.num_epochs}")
logger.info(f" Instantaneous batch size per device = {args.batch_size}")
logger.info(f" Total train batch size (w. parallel, distributed & accumulation) = {total_train_batch_size}")
logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}")
logger.info(f" Total optimization steps = {max_steps}")
for epoch in range(args.num_epochs):
model.train()
with tqdm(total=len(train_dataloader), unit="ba") as pbar:
pbar.set_description(f"Epoch {epoch}")
for step, batch in enumerate(train_dataloader):
clean_images = batch["images"]
batch_size, n_channels, height, width = clean_images.shape
noise_samples = torch.randn(clean_images.shape).to(clean_images.device)
timesteps = torch.randint(
0, noise_scheduler.timesteps, (batch_size,), device=clean_images.device
).long()
# add noise onto the clean images according to the noise magnitude at each timestep
# (this is the forward diffusion process)
noisy_images = noise_scheduler.training_step(clean_images, noise_samples, timesteps)
if step % args.gradient_accumulation_steps != 0:
with accelerator.no_sync(model):
model_output = model(noisy_images, timesteps, batch["text_embeddings"])
model_output, model_var_values = torch.split(model_output, n_channels, dim=1)
# Learn the variance using the variational bound, but don't let
# it affect our mean prediction.
frozen_out = torch.cat([model_output.detach(), model_var_values], dim=1)
# predict the noise residual
loss = F.mse_loss(model_output, noise_samples)
loss = loss / args.gradient_accumulation_steps
accelerator.backward(loss)
optimizer.step()
else:
model_output = model(noisy_images, timesteps, batch["text_embeddings"])
model_output, model_var_values = torch.split(model_output, n_channels, dim=1)
# Learn the variance using the variational bound, but don't let
# it affect our mean prediction.
frozen_out = torch.cat([model_output.detach(), model_var_values], dim=1)
# predict the noise residual
loss = F.mse_loss(model_output, noise_samples)
loss = loss / args.gradient_accumulation_steps
accelerator.backward(loss)
torch.nn.utils.clip_grad_norm_(model.parameters(), 1.0)
optimizer.step()
lr_scheduler.step()
optimizer.zero_grad()
pbar.update(1)
pbar.set_postfix(loss=loss.detach().item(), lr=optimizer.param_groups[0]["lr"])
accelerator.wait_for_everyone()
# Generate a sample image for visual inspection
if accelerator.is_main_process:
model.eval()
with torch.no_grad():
pipeline.unet = accelerator.unwrap_model(model)
generator = torch.manual_seed(0)
# run pipeline in inference (sample random noise and denoise)
image = pipeline("a clip art of a corgi", generator=generator, num_upscale_inference_steps=50)
# process image to PIL
image_processed = image.squeeze(0)
image_processed = ((image_processed + 1) * 127.5).round().clamp(0, 255).to(torch.uint8).cpu().numpy()
image_pil = PIL.Image.fromarray(image_processed)
# save image
test_dir = os.path.join(args.output_dir, "test_samples")
os.makedirs(test_dir, exist_ok=True)
image_pil.save(f"{test_dir}/{epoch:04d}.png")
# save the model
if args.push_to_hub:
push_to_hub(args, pipeline, repo, commit_message=f"Epoch {epoch}", blocking=False)
else:
pipeline.save_pretrained(args.output_dir)
accelerator.wait_for_everyone()
if __name__ == "__main__":
parser = argparse.ArgumentParser(description="Simple example of a training script.")
parser.add_argument("--local_rank", type=int, default=-1)
parser.add_argument("--dataset", type=str, default="fusing/dog_captions")
parser.add_argument("--output_dir", type=str, default="glide-text2image")
parser.add_argument("--overwrite_output_dir", action="store_true")
parser.add_argument("--resolution", type=int, default=64)
parser.add_argument("--batch_size", type=int, default=4)
parser.add_argument("--num_epochs", type=int, default=100)
parser.add_argument("--gradient_accumulation_steps", type=int, default=4)
parser.add_argument("--lr", type=float, default=1e-4)
parser.add_argument("--warmup_steps", type=int, default=500)
parser.add_argument("--push_to_hub", action="store_true")
parser.add_argument("--hub_token", type=str, default=None)
parser.add_argument("--hub_model_id", type=str, default=None)
parser.add_argument("--hub_private_repo", action="store_true")
parser.add_argument(
"--mixed_precision",
type=str,
default="no",
choices=["no", "fp16", "bf16"],
help=(
"Whether to use mixed precision. Choose"
"between fp16 and bf16 (bfloat16). Bf16 requires PyTorch >= 1.10."
"and an Nvidia Ampere GPU."
),
)
args = parser.parse_args()
env_local_rank = int(os.environ.get("LOCAL_RANK", -1))
if env_local_rank != -1 and env_local_rank != args.local_rank:
args.local_rank = env_local_rank
main(args)
examples/train_latent_text_to_image.py
View file @ 26ea58d4
...@@ -4,19 +4,19 @@ import os ...@@ -4,19 +4,19 @@ import os
import torch import torch
import torch.nn.functional as F import torch.nn.functional as F
import bitsandbytes as bnb
import PIL.Image import PIL.Image
from accelerate import Accelerator from accelerate import Accelerator
from datasets import load_dataset from datasets import load_dataset
from diffusers import DDPM, DDPMScheduler, UNetLDMModel from diffusers import DDPMScheduler, LatentDiffusion, UNetLDMModel
from diffusers.hub_utils import init_git_repo, push_to_hub from diffusers.hub_utils import init_git_repo, push_to_hub
from diffusers.modeling_utils import unwrap_model
from diffusers.optimization import get_scheduler from diffusers.optimization import get_scheduler
from diffusers.utils import logging from diffusers.utils import logging
from torchvision.transforms import ( from torchvision.transforms import (
CenterCrop, CenterCrop,
Compose, Compose,
InterpolationMode, InterpolationMode,
Lambda, Normalize,
RandomHorizontalFlip, RandomHorizontalFlip,
Resize, Resize,
ToTensor, ToTensor,
...@@ -30,6 +30,8 @@ logger = logging.get_logger(__name__) ...@@ -30,6 +30,8 @@ logger = logging.get_logger(__name__)
def main(args): def main(args):
accelerator = Accelerator(mixed_precision=args.mixed_precision) accelerator = Accelerator(mixed_precision=args.mixed_precision)
pipeline = LatentDiffusion.from_pretrained("fusing/latent-diffusion-text2im-large")
pipeline.unet = None # this model will be trained from scratch now
model = UNetLDMModel( model = UNetLDMModel(
attention_resolutions=[4, 2, 1], attention_resolutions=[4, 2, 1],
channel_mult=[1, 2, 4, 4], channel_mult=[1, 2, 4, 4],
...@@ -37,7 +39,7 @@ def main(args): ...@@ -37,7 +39,7 @@ def main(args):
conv_resample=True, conv_resample=True,
dims=2, dims=2,
dropout=0, dropout=0,
image_size=32, image_size=8,
in_channels=4, in_channels=4,
model_channels=320, model_channels=320,
num_heads=8, num_heads=8,
...@@ -51,7 +53,7 @@ def main(args): ...@@ -51,7 +53,7 @@ def main(args):
legacy=False, legacy=False,
) )
noise_scheduler = DDPMScheduler(timesteps=1000, tensor_format="pt") noise_scheduler = DDPMScheduler(timesteps=1000, tensor_format="pt")
optimizer = torch.optim.Adam(model.parameters(), lr=args.lr) optimizer = bnb.optim.Adam8bit(model.parameters(), lr=args.lr)
augmentations = Compose( augmentations = Compose(
[ [
...@@ -59,14 +61,22 @@ def main(args): ...@@ -59,14 +61,22 @@ def main(args):
CenterCrop(args.resolution), CenterCrop(args.resolution),
RandomHorizontalFlip(), RandomHorizontalFlip(),
ToTensor(), ToTensor(),
Lambda(lambda x: x * 2 - 1), Normalize([0.5], [0.5]),
] ]
) )
dataset = load_dataset(args.dataset, split="train") dataset = load_dataset(args.dataset, split="train")
text_encoder = pipeline.bert.eval()
vqvae = pipeline.vqvae.eval()
def transforms(examples): def transforms(examples):
images = [augmentations(image.convert("RGB")) for image in examples["image"]] images = [augmentations(image.convert("RGB")) for image in examples["image"]]
return {"input": images} text_inputs = pipeline.tokenizer(examples["caption"], padding="max_length", max_length=77, return_tensors="pt")
with torch.no_grad():
text_embeddings = accelerator.unwrap_model(text_encoder)(text_inputs.input_ids.cpu()).last_hidden_state
images = 1 / 0.18215 * torch.stack(images, dim=0)
latents = accelerator.unwrap_model(vqvae).encode(images.cpu()).mode()
return {"images": images, "text_embeddings": text_embeddings, "latents": latents}
dataset.set_transform(transforms) dataset.set_transform(transforms)
train_dataloader = torch.utils.data.DataLoader(dataset, batch_size=args.batch_size, shuffle=True) train_dataloader = torch.utils.data.DataLoader(dataset, batch_size=args.batch_size, shuffle=True)
...@@ -78,9 +88,11 @@ def main(args): ...@@ -78,9 +88,11 @@ def main(args):
num_training_steps=(len(train_dataloader) * args.num_epochs) // args.gradient_accumulation_steps, num_training_steps=(len(train_dataloader) * args.num_epochs) // args.gradient_accumulation_steps,
) )
model, optimizer, train_dataloader, lr_scheduler = accelerator.prepare( model, text_encoder, vqvae, optimizer, train_dataloader, lr_scheduler = accelerator.prepare(
model, optimizer, train_dataloader, lr_scheduler model, text_encoder, vqvae, optimizer, train_dataloader, lr_scheduler
) )
text_encoder = text_encoder.cpu()
vqvae = vqvae.cpu()
if args.push_to_hub: if args.push_to_hub:
repo = init_git_repo(args, at_init=True) repo = init_git_repo(args, at_init=True)
...@@ -98,29 +110,31 @@ def main(args): ...@@ -98,29 +110,31 @@ def main(args):
logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}") logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}")
logger.info(f" Total optimization steps = {max_steps}") logger.info(f" Total optimization steps = {max_steps}")
global_step = 0
for epoch in range(args.num_epochs): for epoch in range(args.num_epochs):
model.train() model.train()
with tqdm(total=len(train_dataloader), unit="ba") as pbar: with tqdm(total=len(train_dataloader), unit="ba") as pbar:
pbar.set_description(f"Epoch {epoch}") pbar.set_description(f"Epoch {epoch}")
for step, batch in enumerate(train_dataloader): for step, batch in enumerate(train_dataloader):
clean_images = batch["input"] clean_latents = batch["latents"]
noise_samples = torch.randn(clean_images.shape).to(clean_images.device) noise_samples = torch.randn(clean_latents.shape).to(clean_latents.device)
bsz = clean_images.shape[0] bsz = clean_latents.shape[0]
timesteps = torch.randint(0, noise_scheduler.timesteps, (bsz,), device=clean_images.device).long() timesteps = torch.randint(0, noise_scheduler.timesteps, (bsz,), device=clean_latents.device).long()
# add noise onto the clean images according to the noise magnitude at each timestep # add noise onto the clean latents according to the noise magnitude at each timestep
# (this is the forward diffusion process) # (this is the forward diffusion process)
noisy_images = noise_scheduler.training_step(clean_images, noise_samples, timesteps) noisy_latents = noise_scheduler.training_step(clean_latents, noise_samples, timesteps)
if step % args.gradient_accumulation_steps != 0: if step % args.gradient_accumulation_steps != 0:
with accelerator.no_sync(model): with accelerator.no_sync(model):
output = model(noisy_images, timesteps) output = model(noisy_latents, timesteps, context=batch["text_embeddings"])
# predict the noise residual # predict the noise residual
loss = F.mse_loss(output, noise_samples) loss = F.mse_loss(output, noise_samples)
loss = loss / args.gradient_accumulation_steps loss = loss / args.gradient_accumulation_steps
accelerator.backward(loss) accelerator.backward(loss)
optimizer.step()
else: else:
output = model(noisy_images, timesteps) output = model(noisy_latents, timesteps, context=batch["text_embeddings"])
# predict the noise residual # predict the noise residual
loss = F.mse_loss(output, noise_samples) loss = F.mse_loss(output, noise_samples)
loss = loss / args.gradient_accumulation_steps loss = loss / args.gradient_accumulation_steps
...@@ -131,24 +145,25 @@ def main(args): ...@@ -131,24 +145,25 @@ def main(args):
optimizer.zero_grad() optimizer.zero_grad()
pbar.update(1) pbar.update(1)
pbar.set_postfix(loss=loss.detach().item(), lr=optimizer.param_groups[0]["lr"]) pbar.set_postfix(loss=loss.detach().item(), lr=optimizer.param_groups[0]["lr"])
global_step += 1
optimizer.step() accelerator.wait_for_everyone()
if is_distributed:
torch.distributed.barrier()
# Generate a sample image for visual inspection # Generate a sample image for visual inspection
if args.local_rank in [-1, 0]: if accelerator.is_main_process:
model.eval() model.eval()
with torch.no_grad(): with torch.no_grad():
pipeline = DDPM(unet=unwrap_model(model), noise_scheduler=noise_scheduler) pipeline.unet = accelerator.unwrap_model(model)
generator = torch.manual_seed(0) generator = torch.manual_seed(0)
# run pipeline in inference (sample random noise and denoise) # run pipeline in inference (sample random noise and denoise)
image = pipeline(generator=generator) image = pipeline(
["a clip art of a corgi"], generator=generator, eta=0.3, guidance_scale=6.0, num_inference_steps=50
)
# process image to PIL # process image to PIL
image_processed = image.cpu().permute(0, 2, 3, 1) image_processed = image.cpu().permute(0, 2, 3, 1)
image_processed = (image_processed + 1.0) * 127.5 image_processed = image_processed * 255.0
image_processed = image_processed.type(torch.uint8).numpy() image_processed = image_processed.type(torch.uint8).numpy()
image_pil = PIL.Image.fromarray(image_processed[0]) image_pil = PIL.Image.fromarray(image_processed[0])
...@@ -162,20 +177,19 @@ def main(args): ...@@ -162,20 +177,19 @@ def main(args):
push_to_hub(args, pipeline, repo, commit_message=f"Epoch {epoch}", blocking=False) push_to_hub(args, pipeline, repo, commit_message=f"Epoch {epoch}", blocking=False)
else: else:
pipeline.save_pretrained(args.output_dir) pipeline.save_pretrained(args.output_dir)
if is_distributed: accelerator.wait_for_everyone()
torch.distributed.barrier()
if __name__ == "__main__": if __name__ == "__main__":
parser = argparse.ArgumentParser(description="Simple example of a training script.") parser = argparse.ArgumentParser(description="Simple example of a training script.")
parser.add_argument("--local_rank", type=int, default=-1) parser.add_argument("--local_rank", type=int, default=-1)
parser.add_argument("--dataset", type=str, default="huggan/flowers-102-categories") parser.add_argument("--dataset", type=str, default="fusing/dog_captions")
parser.add_argument("--output_dir", type=str, default="ddpm-model") parser.add_argument("--output_dir", type=str, default="ldm-text2image")
parser.add_argument("--overwrite_output_dir", action="store_true") parser.add_argument("--overwrite_output_dir", action="store_true")
parser.add_argument("--resolution", type=int, default=64) parser.add_argument("--resolution", type=int, default=128)
parser.add_argument("--batch_size", type=int, default=16) parser.add_argument("--batch_size", type=int, default=1)
parser.add_argument("--num_epochs", type=int, default=100) parser.add_argument("--num_epochs", type=int, default=100)
parser.add_argument("--gradient_accumulation_steps", type=int, default=1) parser.add_argument("--gradient_accumulation_steps", type=int, default=16)
parser.add_argument("--lr", type=float, default=1e-4) parser.add_argument("--lr", type=float, default=1e-4)
parser.add_argument("--warmup_steps", type=int, default=500) parser.add_argument("--warmup_steps", type=int, default=500)
parser.add_argument("--push_to_hub", action="store_true") parser.add_argument("--push_to_hub", action="store_true")
......
examples/train_unconditional.py
View file @ 26ea58d4
...@@ -7,7 +7,7 @@ import torch.nn.functional as F ...@@ -7,7 +7,7 @@ import torch.nn.functional as F
import PIL.Image import PIL.Image
from accelerate import Accelerator from accelerate import Accelerator
from datasets import load_dataset from datasets import load_dataset
from diffusers import DDPM, DDPMScheduler, UNetModel from diffusers import DDPMPipeline, DDPMScheduler, UNetModel
from diffusers.hub_utils import init_git_repo, push_to_hub from diffusers.hub_utils import init_git_repo, push_to_hub
from diffusers.optimization import get_scheduler from diffusers.optimization import get_scheduler
from diffusers.training_utils import EMAModel from diffusers.training_utils import EMAModel
...@@ -71,7 +71,7 @@ def main(args): ...@@ -71,7 +71,7 @@ def main(args):
model, optimizer, train_dataloader, lr_scheduler model, optimizer, train_dataloader, lr_scheduler
) )
ema_model = EMAModel(model, inv_gamma=1.0, power=3 / 4) ema_model = EMAModel(model, inv_gamma=args.ema_inv_gamma, power=args.ema_power, max_value=args.ema_max_decay)
if args.push_to_hub: if args.push_to_hub:
repo = init_git_repo(args, at_init=True) repo = init_git_repo(args, at_init=True)
...@@ -133,7 +133,7 @@ def main(args): ...@@ -133,7 +133,7 @@ def main(args):
# Generate a sample image for visual inspection # Generate a sample image for visual inspection
if accelerator.is_main_process: if accelerator.is_main_process:
with torch.no_grad(): with torch.no_grad():
pipeline = DDPM( pipeline = DDPMPipeline(
unet=accelerator.unwrap_model(ema_model.averaged_model), noise_scheduler=noise_scheduler unet=accelerator.unwrap_model(ema_model.averaged_model), noise_scheduler=noise_scheduler
) )
...@@ -172,6 +172,9 @@ if __name__ == "__main__": ...@@ -172,6 +172,9 @@ if __name__ == "__main__":
parser.add_argument("--gradient_accumulation_steps", type=int, default=1) parser.add_argument("--gradient_accumulation_steps", type=int, default=1)
parser.add_argument("--lr", type=float, default=1e-4) parser.add_argument("--lr", type=float, default=1e-4)
parser.add_argument("--warmup_steps", type=int, default=500) parser.add_argument("--warmup_steps", type=int, default=500)
parser.add_argument("--ema_inv_gamma", type=float, default=1.0)
parser.add_argument("--ema_power", type=float, default=3 / 4)
parser.add_argument("--ema_max_decay", type=float, default=0.999)
parser.add_argument("--push_to_hub", action="store_true") parser.add_argument("--push_to_hub", action="store_true")
parser.add_argument("--hub_token", type=str, default=None) parser.add_argument("--hub_token", type=str, default=None)
parser.add_argument("--hub_model_id", type=str, default=None) parser.add_argument("--hub_model_id", type=str, default=None)
......
src/diffusers/hub_utils.py
View file @ 26ea58d4
...@@ -47,12 +47,11 @@ def get_full_repo_name(model_id: str, organization: Optional[str] = None, token: ...@@ -47,12 +47,11 @@ def get_full_repo_name(model_id: str, organization: Optional[str] = None, token:
def init_git_repo(args, at_init: bool = False): def init_git_repo(args, at_init: bool = False):
""" """
Initializes a git repo in `args.hub_model_id`.
Args: Args:
Initializes a git repo in `args.hub_model_id`.
at_init (`bool`, *optional*, defaults to `False`): at_init (`bool`, *optional*, defaults to `False`):
Whether this function is called before any training or not. If `self.args.overwrite_output_dir` is Whether this function is called before any training or not. If `self.args.overwrite_output_dir` is `True`
`True` and `at_init` is `True`, the path to the repo (which is `self.args.output_dir`) might be wiped and `at_init` is `True`, the path to the repo (which is `self.args.output_dir`) might be wiped out.
out.
""" """
if args.local_rank not in [-1, 0]: if args.local_rank not in [-1, 0]:
return return
...@@ -102,8 +101,8 @@ def push_to_hub( ...@@ -102,8 +101,8 @@ def push_to_hub(
**kwargs, **kwargs,
) -> str: ) -> str:
""" """
Upload *self.model* and *self.tokenizer* to the 🤗 model hub on the repo *self.args.hub_model_id*.
Parameters: Parameters:
Upload *self.model* and *self.tokenizer* to the 🤗 model hub on the repo *self.args.hub_model_id*.
commit_message (`str`, *optional*, defaults to `"End of training"`): commit_message (`str`, *optional*, defaults to `"End of training"`):
Message to commit while pushing. Message to commit while pushing.
blocking (`bool`, *optional*, defaults to `True`): blocking (`bool`, *optional*, defaults to `True`):
...@@ -111,8 +110,8 @@ def push_to_hub( ...@@ -111,8 +110,8 @@ def push_to_hub(
kwargs: kwargs:
Additional keyword arguments passed along to [`create_model_card`]. Additional keyword arguments passed along to [`create_model_card`].
Returns: Returns:
The url of the commit of your model in the given repository if `blocking=False`, a tuple with the url of The url of the commit of your model in the given repository if `blocking=False`, a tuple with the url of the
the commit and an object to track the progress of the commit if `blocking=True` commit and an object to track the progress of the commit if `blocking=True`
""" """
if args.hub_model_id is None: if args.hub_model_id is None:
......
src/diffusers/modeling_utils.py
View file @ 26ea58d4
...@@ -123,16 +123,16 @@ class ModelMixin(torch.nn.Module): ...@@ -123,16 +123,16 @@ class ModelMixin(torch.nn.Module):
r""" r"""
Base class for all models. Base class for all models.
[`ModelMixin`] takes care of storing the configuration of the models and handles methods for loading, [`ModelMixin`] takes care of storing the configuration of the models and handles methods for loading, downloading
downloading and saving models as well as a few methods common to all models to: and saving models as well as a few methods common to all models to:
- resize the input embeddings, - resize the input embeddings,
- prune heads in the self-attention heads. - prune heads in the self-attention heads.
Class attributes (overridden by derived classes): Class attributes (overridden by derived classes):
- **config_class** ([`ConfigMixin`]) -- A subclass of [`ConfigMixin`] to use as configuration class - **config_class** ([`ConfigMixin`]) -- A subclass of [`ConfigMixin`] to use as configuration class for this
for this model architecture. model architecture.
- **load_tf_weights** (`Callable`) -- A python *method* for loading a TensorFlow checkpoint in a PyTorch model, - **load_tf_weights** (`Callable`) -- A python *method* for loading a TensorFlow checkpoint in a PyTorch model,
taking as arguments: taking as arguments:
...@@ -227,8 +227,8 @@ class ModelMixin(torch.nn.Module): ...@@ -227,8 +227,8 @@ class ModelMixin(torch.nn.Module):
- A string, the *model id* of a pretrained model hosted inside a model repo on huggingface.co. - A string, the *model id* of a pretrained model hosted inside a model repo on huggingface.co.
Valid model ids can be located at the root-level, like `bert-base-uncased`, or namespaced under a Valid model ids can be located at the root-level, like `bert-base-uncased`, or namespaced under a
user or organization name, like `dbmdz/bert-base-german-cased`. user or organization name, like `dbmdz/bert-base-german-cased`.
- A path to a *directory* containing model weights saved using - A path to a *directory* containing model weights saved using [`~ModelMixin.save_pretrained`],
[`~ModelMixin.save_pretrained`], e.g., `./my_model_directory/`. e.g., `./my_model_directory/`.
config (`Union[ConfigMixin, str, os.PathLike]`, *optional*): config (`Union[ConfigMixin, str, os.PathLike]`, *optional*):
Can be either: Can be either:
...@@ -236,13 +236,13 @@ class ModelMixin(torch.nn.Module): ...@@ -236,13 +236,13 @@ class ModelMixin(torch.nn.Module):
- an instance of a class derived from [`ConfigMixin`], - an instance of a class derived from [`ConfigMixin`],
- a string or path valid as input to [`~ConfigMixin.from_pretrained`]. - a string or path valid as input to [`~ConfigMixin.from_pretrained`].
ConfigMixinuration for the model to use instead of an automatically loaded configuration. ConfigMixinuration can ConfigMixinuration for the model to use instead of an automatically loaded configuration.
be automatically loaded when: ConfigMixinuration can be automatically loaded when:
- The model is a model provided by the library (loaded with the *model id* string of a pretrained - The model is a model provided by the library (loaded with the *model id* string of a pretrained
model). model).
- The model was saved using [`~ModelMixin.save_pretrained`] and is reloaded by supplying the - The model was saved using [`~ModelMixin.save_pretrained`] and is reloaded by supplying the save
save directory. directory.
- The model is loaded by supplying a local directory as `pretrained_model_name_or_path` and a - The model is loaded by supplying a local directory as `pretrained_model_name_or_path` and a
configuration JSON file named *config.json* is found in the directory. configuration JSON file named *config.json* is found in the directory.
cache_dir (`Union[str, os.PathLike]`, *optional*): cache_dir (`Union[str, os.PathLike]`, *optional*):
...@@ -292,10 +292,10 @@ class ModelMixin(torch.nn.Module): ...@@ -292,10 +292,10 @@ class ModelMixin(torch.nn.Module):
underlying model's `__init__` method (we assume all relevant updates to the configuration have underlying model's `__init__` method (we assume all relevant updates to the configuration have
already been done) already been done)
- If a configuration is not provided, `kwargs` will be first passed to the configuration class - If a configuration is not provided, `kwargs` will be first passed to the configuration class
initialization function ([`~ConfigMixin.from_pretrained`]). Each key of `kwargs` that initialization function ([`~ConfigMixin.from_pretrained`]). Each key of `kwargs` that corresponds
corresponds to a configuration attribute will be used to override said attribute with the to a configuration attribute will be used to override said attribute with the supplied `kwargs`
supplied `kwargs` value. Remaining keys that do not correspond to any configuration attribute value. Remaining keys that do not correspond to any configuration attribute will be passed to the
will be passed to the underlying model's `__init__` function. underlying model's `__init__` function.
<Tip> <Tip>
......
src/diffusers/models/embeddings.py
View file @ 26ea58d4
...@@ -22,14 +22,12 @@ def get_timestep_embedding( ...@@ -22,14 +22,12 @@ def get_timestep_embedding(
timesteps, embedding_dim, flip_sin_to_cos=False, downscale_freq_shift=1, scale=1, max_period=10000 timesteps, embedding_dim, flip_sin_to_cos=False, downscale_freq_shift=1, scale=1, max_period=10000
): ):
""" """
This matches the implementation in Denoising Diffusion Probabilistic Models: This matches the implementation in Denoising Diffusion Probabilistic Models: Create sinusoidal timestep embeddings.
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element. :param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional. These may be fractional.
:param embedding_dim: the dimension of the output. :param embedding_dim: the dimension of the output. :param max_period: controls the minimum frequency of the
:param max_period: controls the minimum frequency of the embeddings. embeddings. :return: an [N x dim] Tensor of positional embeddings.
:return: an [N x dim] Tensor of positional embeddings.
""" """
assert len(timesteps.shape) == 1, "Timesteps should be a 1d-array" assert len(timesteps.shape) == 1, "Timesteps should be a 1d-array"
......
src/diffusers/models/resnet.py
View file @ 26ea58d4
...@@ -58,9 +58,8 @@ class Upsample(nn.Module): ...@@ -58,9 +58,8 @@ class Upsample(nn.Module):
""" """
An upsampling layer with an optional convolution. An upsampling layer with an optional convolution.
:param channels: channels in the inputs and outputs. :param channels: channels in the inputs and outputs. :param use_conv: a bool determining if a convolution is
:param use_conv: a bool determining if a convolution is applied. applied. :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
:param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
upsampling occurs in the inner-two dimensions. upsampling occurs in the inner-two dimensions.
""" """
...@@ -97,9 +96,8 @@ class Downsample(nn.Module): ...@@ -97,9 +96,8 @@ class Downsample(nn.Module):
""" """
A downsampling layer with an optional convolution. A downsampling layer with an optional convolution.
:param channels: channels in the inputs and outputs. :param channels: channels in the inputs and outputs. :param use_conv: a bool determining if a convolution is
:param use_conv: a bool determining if a convolution is applied. applied. :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
:param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
downsampling occurs in the inner-two dimensions. downsampling occurs in the inner-two dimensions.
""" """
...@@ -136,6 +134,86 @@ class Downsample(nn.Module): ...@@ -136,6 +134,86 @@ class Downsample(nn.Module):
return self.op(x) return self.op(x)
class UNetUpsample(nn.Module):
def __init__(self, in_channels, with_conv):
super().__init__()
self.with_conv = with_conv
if self.with_conv:
self.conv = torch.nn.Conv2d(in_channels, in_channels, kernel_size=3, stride=1, padding=1)
def forward(self, x):
x = torch.nn.functional.interpolate(x, scale_factor=2.0, mode="nearest")
if self.with_conv:
x = self.conv(x)
return x
class GlideUpsample(nn.Module):
"""
An upsampling layer with an optional convolution.
:param channels: channels in the inputs and outputs. :param use_conv: a bool determining if a convolution is
applied. :param dims: determines if the signal is 1D, 2D, or 3D. If 3D, then
upsampling occurs in the inner-two dimensions.
"""
def __init__(self, channels, use_conv, dims=2, out_channels=None):
super().__init__()
self.channels = channels
self.out_channels = out_channels or channels
self.use_conv = use_conv
self.dims = dims
if use_conv:
self.conv = conv_nd(dims, self.channels, self.out_channels, 3, padding=1)
def forward(self, x):
assert x.shape[1] == self.channels
if self.dims == 3:
x = F.interpolate(x, (x.shape[2], x.shape[3] * 2, x.shape[4] * 2), mode="nearest")
else:
x = F.interpolate(x, scale_factor=2, mode="nearest")
if self.use_conv:
x = self.conv(x)
return x
class LDMUpsample(nn.Module):
"""
An upsampling layer with an optional convolution. :param channels: channels in the inputs and outputs. :param
use_conv: a bool determining if a convolution is applied. :param dims: determines if the signal is 1D, 2D, or 3D.
If 3D, then
upsampling occurs in the inner-two dimensions.
"""
def __init__(self, channels, use_conv, dims=2, out_channels=None, padding=1):
super().__init__()
self.channels = channels
self.out_channels = out_channels or channels
self.use_conv = use_conv
self.dims = dims
if use_conv:
self.conv = conv_nd(dims, self.channels, self.out_channels, 3, padding=padding)
def forward(self, x):
assert x.shape[1] == self.channels
if self.dims == 3:
x = F.interpolate(x, (x.shape[2], x.shape[3] * 2, x.shape[4] * 2), mode="nearest")
else:
x = F.interpolate(x, scale_factor=2, mode="nearest")
if self.use_conv:
x = self.conv(x)
return x
class GradTTSUpsample(torch.nn.Module):
def __init__(self, dim):
super(Upsample, self).__init__()
self.conv = torch.nn.ConvTranspose2d(dim, dim, 4, 2, 1)
def forward(self, x):
return self.conv(x)
# TODO (patil-suraj): needs test # TODO (patil-suraj): needs test
class Upsample1d(nn.Module): class Upsample1d(nn.Module):
def __init__(self, dim): def __init__(self, dim):
......
src/diffusers/models/unet_glide.py
View file @ 26ea58d4
...@@ -82,8 +82,7 @@ def normalization(channels, swish=0.0): ...@@ -82,8 +82,7 @@ def normalization(channels, swish=0.0):
""" """
Make a standard normalization layer, with an optional swish activation. Make a standard normalization layer, with an optional swish activation.
:param channels: number of input channels. :param channels: number of input channels. :return: an nn.Module for normalization.
:return: an nn.Module for normalization.
""" """
return GroupNorm32(num_channels=channels, num_groups=32, swish=swish) return GroupNorm32(num_channels=channels, num_groups=32, swish=swish)
...@@ -111,8 +110,7 @@ class TimestepBlock(nn.Module): ...@@ -111,8 +110,7 @@ class TimestepBlock(nn.Module):
class TimestepEmbedSequential(nn.Sequential, TimestepBlock): class TimestepEmbedSequential(nn.Sequential, TimestepBlock):
""" """
A sequential module that passes timestep embeddings to the children that A sequential module that passes timestep embeddings to the children that support it as an extra input.
support it as an extra input.
""" """
def forward(self, x, emb, encoder_out=None): def forward(self, x, emb, encoder_out=None):
...@@ -130,17 +128,13 @@ class ResBlock(TimestepBlock): ...@@ -130,17 +128,13 @@ class ResBlock(TimestepBlock):
""" """
A residual block that can optionally change the number of channels. A residual block that can optionally change the number of channels.
:param channels: the number of input channels. :param channels: the number of input channels. :param emb_channels: the number of timestep embedding channels.
:param emb_channels: the number of timestep embedding channels. :param dropout: the rate of dropout. :param out_channels: if specified, the number of out channels. :param
:param dropout: the rate of dropout. use_conv: if True and out_channels is specified, use a spatial
:param out_channels: if specified, the number of out channels. convolution instead of a smaller 1x1 convolution to change the channels in the skip connection.
:param use_conv: if True and out_channels is specified, use a spatial :param dims: determines if the signal is 1D, 2D, or 3D. :param use_checkpoint: if True, use gradient checkpointing
convolution instead of a smaller 1x1 convolution to change the on this module. :param up: if True, use this block for upsampling. :param down: if True, use this block for
channels in the skip connection. downsampling.
:param dims: determines if the signal is 1D, 2D, or 3D.
:param use_checkpoint: if True, use gradient checkpointing on this module.
:param up: if True, use this block for upsampling.
:param down: if True, use this block for downsampling.
""" """
def __init__( def __init__(
...@@ -207,8 +201,7 @@ class ResBlock(TimestepBlock): ...@@ -207,8 +201,7 @@ class ResBlock(TimestepBlock):
""" """
Apply the block to a Tensor, conditioned on a timestep embedding. Apply the block to a Tensor, conditioned on a timestep embedding.
:param x: an [N x C x ...] Tensor of features. :param x: an [N x C x ...] Tensor of features. :param emb: an [N x emb_channels] Tensor of timestep embeddings.
:param emb: an [N x emb_channels] Tensor of timestep embeddings.
:return: an [N x C x ...] Tensor of outputs. :return: an [N x C x ...] Tensor of outputs.
""" """
if self.updown: if self.updown:
...@@ -292,8 +285,8 @@ class QKVAttention(nn.Module): ...@@ -292,8 +285,8 @@ class QKVAttention(nn.Module):
""" """
Apply QKV attention. Apply QKV attention.
:param qkv: an [N x (H * 3 * C) x T] tensor of Qs, Ks, and Vs. :param qkv: an [N x (H * 3 * C) x T] tensor of Qs, Ks, and Vs. :return: an [N x (H * C) x T] tensor after
:return: an [N x (H * C) x T] tensor after attention. attention.
""" """
bs, width, length = qkv.shape bs, width, length = qkv.shape
assert width % (3 * self.n_heads) == 0 assert width % (3 * self.n_heads) == 0
...@@ -315,29 +308,24 @@ class GlideUNetModel(ModelMixin, ConfigMixin): ...@@ -315,29 +308,24 @@ class GlideUNetModel(ModelMixin, ConfigMixin):
""" """
The full UNet model with attention and timestep embedding. The full UNet model with attention and timestep embedding.
:param in_channels: channels in the input Tensor. :param in_channels: channels in the input Tensor. :param model_channels: base channel count for the model. :param
:param model_channels: base channel count for the model. out_channels: channels in the output Tensor. :param num_res_blocks: number of residual blocks per downsample.
:param out_channels: channels in the output Tensor.
:param num_res_blocks: number of residual blocks per downsample.
:param attention_resolutions: a collection of downsample rates at which :param attention_resolutions: a collection of downsample rates at which
attention will take place. May be a set, list, or tuple. attention will take place. May be a set, list, or tuple. For example, if this contains 4, then at 4x
For example, if this contains 4, then at 4x downsampling, attention downsampling, attention will be used.
will be used. :param dropout: the dropout probability. :param channel_mult: channel multiplier for each level of the UNet. :param
:param dropout: the dropout probability. conv_resample: if True, use learned convolutions for upsampling and
:param channel_mult: channel multiplier for each level of the UNet.
:param conv_resample: if True, use learned convolutions for upsampling and
downsampling. downsampling.
:param dims: determines if the signal is 1D, 2D, or 3D. :param dims: determines if the signal is 1D, 2D, or 3D. :param num_classes: if specified (as an int), then this
:param num_classes: if specified (as an int), then this model will be model will be
class-conditional with `num_classes` classes. class-conditional with `num_classes` classes.
:param use_checkpoint: use gradient checkpointing to reduce memory usage. :param use_checkpoint: use gradient checkpointing to reduce memory usage. :param num_heads: the number of attention
:param num_heads: the number of attention heads in each attention layer. heads in each attention layer. :param num_heads_channels: if specified, ignore num_heads and instead use
:param num_heads_channels: if specified, ignore num_heads and instead use
a fixed channel width per attention head. a fixed channel width per attention head.
:param num_heads_upsample: works with num_heads to set a different number :param num_heads_upsample: works with num_heads to set a different number
of heads for upsampling. Deprecated. of heads for upsampling. Deprecated.
:param use_scale_shift_norm: use a FiLM-like conditioning mechanism. :param use_scale_shift_norm: use a FiLM-like conditioning mechanism. :param resblock_updown: use residual blocks
:param resblock_updown: use residual blocks for up/downsampling. for up/downsampling.
""" """
def __init__( def __init__(
...@@ -545,10 +533,8 @@ class GlideUNetModel(ModelMixin, ConfigMixin): ...@@ -545,10 +533,8 @@ class GlideUNetModel(ModelMixin, ConfigMixin):
""" """
Apply the model to an input batch. Apply the model to an input batch.
:param x: an [N x C x ...] Tensor of inputs. :param x: an [N x C x ...] Tensor of inputs. :param timesteps: a 1-D batch of timesteps. :param y: an [N]
:param timesteps: a 1-D batch of timesteps. Tensor of labels, if class-conditional. :return: an [N x C x ...] Tensor of outputs.
:param y: an [N] Tensor of labels, if class-conditional.
:return: an [N x C x ...] Tensor of outputs.
""" """
hs = [] hs = []
......
src/diffusers/models/unet_grad_tts.py
View file @ 26ea58d4
import torch import torch
from numpy import pad from numpy import pad
try:
from einops import rearrange
except:
print("Einops is not installed")
pass
from ..configuration_utils import ConfigMixin from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin from ..modeling_utils import ModelMixin
from .embeddings import get_timestep_embedding from .embeddings import get_timestep_embedding
...@@ -65,6 +58,7 @@ class LinearAttention(torch.nn.Module): ...@@ -65,6 +58,7 @@ class LinearAttention(torch.nn.Module):
def __init__(self, dim, heads=4, dim_head=32): def __init__(self, dim, heads=4, dim_head=32):
super(LinearAttention, self).__init__() super(LinearAttention, self).__init__()
self.heads = heads self.heads = heads
self.dim_head = dim_head
hidden_dim = dim_head * heads hidden_dim = dim_head * heads
self.to_qkv = torch.nn.Conv2d(dim, hidden_dim * 3, 1, bias=False) self.to_qkv = torch.nn.Conv2d(dim, hidden_dim * 3, 1, bias=False)
self.to_out = torch.nn.Conv2d(hidden_dim, dim, 1) self.to_out = torch.nn.Conv2d(hidden_dim, dim, 1)
...@@ -72,11 +66,17 @@ class LinearAttention(torch.nn.Module): ...@@ -72,11 +66,17 @@ class LinearAttention(torch.nn.Module):
def forward(self, x): def forward(self, x):
b, c, h, w = x.shape b, c, h, w = x.shape
qkv = self.to_qkv(x) qkv = self.to_qkv(x)
q, k, v = rearrange(qkv, "b (qkv heads c) h w -> qkv b heads c (h w)", heads=self.heads, qkv=3) # q, k, v = rearrange(qkv, "b (qkv heads c) h w -> qkv b heads c (h w)", heads=self.heads, qkv=3)
q, k, v = (
qkv.reshape(b, 3, self.heads, self.dim_head, h, w)
.permute(1, 0, 2, 3, 4, 5)
.reshape(3, b, self.heads, self.dim_head, -1)
)
k = k.softmax(dim=-1) k = k.softmax(dim=-1)
context = torch.einsum("bhdn,bhen->bhde", k, v) context = torch.einsum("bhdn,bhen->bhde", k, v)
out = torch.einsum("bhde,bhdn->bhen", context, q) out = torch.einsum("bhde,bhdn->bhen", context, q)
out = rearrange(out, "b heads c (h w) -> b (heads c) h w", heads=self.heads, h=h, w=w) # out = rearrange(out, "b heads c (h w) -> b (heads c) h w", heads=self.heads, h=h, w=w)
out = out.reshape(b, self.heads, self.dim_head, h, w).reshape(b, self.heads * self.dim_head, h, w)
return self.to_out(out) return self.to_out(out)
......
src/diffusers/models/unet_ldm.py
View file @ 26ea58d4
...@@ -7,13 +7,6 @@ import torch ...@@ -7,13 +7,6 @@ import torch
import torch.nn as nn import torch.nn as nn
import torch.nn.functional as F import torch.nn.functional as F
try:
from einops import rearrange, repeat
except:
print("Einops is not installed")
pass
from ..configuration_utils import ConfigMixin from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin from ..modeling_utils import ModelMixin
from .embeddings import get_timestep_embedding from .embeddings import get_timestep_embedding
...@@ -155,7 +148,23 @@ class CrossAttention(nn.Module): ...@@ -155,7 +148,23 @@ class CrossAttention(nn.Module):
self.to_out = nn.Sequential(nn.Linear(inner_dim, query_dim), nn.Dropout(dropout)) self.to_out = nn.Sequential(nn.Linear(inner_dim, query_dim), nn.Dropout(dropout))
def reshape_heads_to_batch_dim(self, tensor):
batch_size, seq_len, dim = tensor.shape
head_size = self.heads
tensor = tensor.reshape(batch_size, seq_len, head_size, dim // head_size)
tensor = tensor.permute(0, 2, 1, 3).reshape(batch_size * head_size, seq_len, dim // head_size)
return tensor
def reshape_batch_dim_to_heads(self, tensor):
batch_size, seq_len, dim = tensor.shape
head_size = self.heads
tensor = tensor.reshape(batch_size // head_size, head_size, seq_len, dim)
tensor = tensor.permute(0, 2, 1, 3).reshape(batch_size // head_size, seq_len, dim * head_size)
return tensor
def forward(self, x, context=None, mask=None): def forward(self, x, context=None, mask=None):
batch_size, sequence_length, dim = x.shape
h = self.heads h = self.heads
q = self.to_q(x) q = self.to_q(x)
...@@ -163,21 +172,29 @@ class CrossAttention(nn.Module): ...@@ -163,21 +172,29 @@ class CrossAttention(nn.Module):
k = self.to_k(context) k = self.to_k(context)
v = self.to_v(context) v = self.to_v(context)
q, k, v = map(lambda t: rearrange(t, "b n (h d) -> (b h) n d", h=h), (q, k, v)) # q, k, v = map(lambda t: rearrange(t, "b n (h d) -> (b h) n d", h=h), (q, k, v))
q = self.reshape_heads_to_batch_dim(q)
k = self.reshape_heads_to_batch_dim(k)
v = self.reshape_heads_to_batch_dim(v)
sim = torch.einsum("b i d, b j d -> b i j", q, k) * self.scale sim = torch.einsum("b i d, b j d -> b i j", q, k) * self.scale
if exists(mask): if exists(mask):
mask = rearrange(mask, "b ... -> b (...)") # mask = rearrange(mask, "b ... -> b (...)")
maks = mask.reshape(batch_size, -1)
max_neg_value = -torch.finfo(sim.dtype).max max_neg_value = -torch.finfo(sim.dtype).max
mask = repeat(mask, "b j -> (b h) () j", h=h) # mask = repeat(mask, "b j -> (b h) () j", h=h)
mask = mask[:, None, :].repeat(h, 1, 1)
# x = rearrange(x, "b (h w) c -> b c h w", h=h, w=w)
sim.masked_fill_(~mask, max_neg_value) sim.masked_fill_(~mask, max_neg_value)
# attention, what we cannot get enough of # attention, what we cannot get enough of
attn = sim.softmax(dim=-1) attn = sim.softmax(dim=-1)
out = torch.einsum("b i j, b j d -> b i d", attn, v) out = torch.einsum("b i j, b j d -> b i d", attn, v)
out = rearrange(out, "(b h) n d -> b n (h d)", h=h) out = self.reshape_batch_dim_to_heads(out)
# out = rearrange(out, "(b h) n d -> b n (h d)", h=h)
return self.to_out(out) return self.to_out(out)
...@@ -205,11 +222,8 @@ class BasicTransformerBlock(nn.Module): ...@@ -205,11 +222,8 @@ class BasicTransformerBlock(nn.Module):
class SpatialTransformer(nn.Module): class SpatialTransformer(nn.Module):
""" """
Transformer block for image-like data. Transformer block for image-like data. First, project the input (aka embedding) and reshape to b, t, d. Then apply
First, project the input (aka embedding) standard transformer action. Finally, reshape to image
and reshape to b, t, d.
Then apply standard transformer action.
Finally, reshape to image
""" """
def __init__(self, in_channels, n_heads, d_head, depth=1, dropout=0.0, context_dim=None): def __init__(self, in_channels, n_heads, d_head, depth=1, dropout=0.0, context_dim=None):
...@@ -235,10 +249,10 @@ class SpatialTransformer(nn.Module): ...@@ -235,10 +249,10 @@ class SpatialTransformer(nn.Module):
x_in = x x_in = x
x = self.norm(x) x = self.norm(x)
x = self.proj_in(x) x = self.proj_in(x)
x = rearrange(x, "b c h w -> b (h w) c") x = x.permute(0, 2, 3, 1).reshape(b, h * w, c)
for block in self.transformer_blocks: for block in self.transformer_blocks:
x = block(x, context=context) x = block(x, context=context)
x = rearrange(x, "b (h w) c -> b c h w", h=h, w=w) x = x.reshape(b, h, w, c).permute(0, 3, 1, 2)
x = self.proj_out(x) x = self.proj_out(x)
return x + x_in return x + x_in
...@@ -314,8 +328,7 @@ def normalization(channels, swish=0.0): ...@@ -314,8 +328,7 @@ def normalization(channels, swish=0.0):
""" """
Make a standard normalization layer, with an optional swish activation. Make a standard normalization layer, with an optional swish activation.
:param channels: number of input channels. :param channels: number of input channels. :return: an nn.Module for normalization.
:return: an nn.Module for normalization.
""" """
return GroupNorm32(num_channels=channels, num_groups=32, swish=swish) return GroupNorm32(num_channels=channels, num_groups=32, swish=swish)
...@@ -365,8 +378,7 @@ class TimestepBlock(nn.Module): ...@@ -365,8 +378,7 @@ class TimestepBlock(nn.Module):
class TimestepEmbedSequential(nn.Sequential, TimestepBlock): class TimestepEmbedSequential(nn.Sequential, TimestepBlock):
""" """
A sequential module that passes timestep embeddings to the children that A sequential module that passes timestep embeddings to the children that support it as an extra input.
support it as an extra input.
""" """
def forward(self, x, emb, context=None): def forward(self, x, emb, context=None):
...@@ -382,18 +394,14 @@ class TimestepEmbedSequential(nn.Sequential, TimestepBlock): ...@@ -382,18 +394,14 @@ class TimestepEmbedSequential(nn.Sequential, TimestepBlock):
class ResBlock(TimestepBlock): class ResBlock(TimestepBlock):
""" """
A residual block that can optionally change the number of channels. A residual block that can optionally change the number of channels. :param channels: the number of input channels.
:param channels: the number of input channels. :param emb_channels: the number of timestep embedding channels. :param dropout: the rate of dropout. :param
:param emb_channels: the number of timestep embedding channels. out_channels: if specified, the number of out channels. :param use_conv: if True and out_channels is specified, use
:param dropout: the rate of dropout. a spatial
:param out_channels: if specified, the number of out channels. convolution instead of a smaller 1x1 convolution to change the channels in the skip connection.
:param use_conv: if True and out_channels is specified, use a spatial :param dims: determines if the signal is 1D, 2D, or 3D. :param use_checkpoint: if True, use gradient checkpointing
convolution instead of a smaller 1x1 convolution to change the on this module. :param up: if True, use this block for upsampling. :param down: if True, use this block for
channels in the skip connection. downsampling.
:param dims: determines if the signal is 1D, 2D, or 3D.
:param use_checkpoint: if True, use gradient checkpointing on this module.
:param up: if True, use this block for upsampling.
:param down: if True, use this block for downsampling.
""" """
def __init__( def __init__(
...@@ -481,8 +489,8 @@ class ResBlock(TimestepBlock): ...@@ -481,8 +489,8 @@ class ResBlock(TimestepBlock):
class AttentionBlock(nn.Module): class AttentionBlock(nn.Module):
""" """
An attention block that allows spatial positions to attend to each other. An attention block that allows spatial positions to attend to each other. Originally ported from here, but adapted
Originally ported from here, but adapted to the N-d case. to the N-d case.
https://github.com/hojonathanho/diffusion/blob/1e0dceb3b3495bbe19116a5e1b3596cd0706c543/diffusion_tf/models/unet.py#L66. https://github.com/hojonathanho/diffusion/blob/1e0dceb3b3495bbe19116a5e1b3596cd0706c543/diffusion_tf/models/unet.py#L66.
""" """
...@@ -531,9 +539,8 @@ class QKVAttention(nn.Module): ...@@ -531,9 +539,8 @@ class QKVAttention(nn.Module):
def forward(self, qkv): def forward(self, qkv):
""" """
Apply QKV attention. Apply QKV attention. :param qkv: an [N x (3 * H * C) x T] tensor of Qs, Ks, and Vs. :return: an [N x (H * C) x
:param qkv: an [N x (3 * H * C) x T] tensor of Qs, Ks, and Vs. T] tensor after attention.
:return: an [N x (H * C) x T] tensor after attention.
""" """
bs, width, length = qkv.shape bs, width, length = qkv.shape
assert width % (3 * self.n_heads) == 0 assert width % (3 * self.n_heads) == 0
...@@ -556,13 +563,9 @@ class QKVAttention(nn.Module): ...@@ -556,13 +563,9 @@ class QKVAttention(nn.Module):
def count_flops_attn(model, _x, y): def count_flops_attn(model, _x, y):
""" """
A counter for the `thop` package to count the operations in an A counter for the `thop` package to count the operations in an attention operation. Meant to be used like:
attention operation.
Meant to be used like:
macs, params = thop.profile( macs, params = thop.profile(
model, model, inputs=(inputs, timestamps), custom_ops={QKVAttention: QKVAttention.count_flops},
inputs=(inputs, timestamps),
custom_ops={QKVAttention: QKVAttention.count_flops},
) )
""" """
b, c, *spatial = y[0].shape b, c, *spatial = y[0].shape
...@@ -585,9 +588,8 @@ class QKVAttentionLegacy(nn.Module): ...@@ -585,9 +588,8 @@ class QKVAttentionLegacy(nn.Module):
def forward(self, qkv): def forward(self, qkv):
""" """
Apply QKV attention. Apply QKV attention. :param qkv: an [N x (H * 3 * C) x T] tensor of Qs, Ks, and Vs. :return: an [N x (H * C) x
:param qkv: an [N x (H * 3 * C) x T] tensor of Qs, Ks, and Vs. T] tensor after attention.
:return: an [N x (H * C) x T] tensor after attention.
""" """
bs, width, length = qkv.shape bs, width, length = qkv.shape
assert width % (3 * self.n_heads) == 0 assert width % (3 * self.n_heads) == 0
...@@ -606,31 +608,25 @@ class QKVAttentionLegacy(nn.Module): ...@@ -606,31 +608,25 @@ class QKVAttentionLegacy(nn.Module):
class UNetLDMModel(ModelMixin, ConfigMixin): class UNetLDMModel(ModelMixin, ConfigMixin):
""" """
The full UNet model with attention and timestep embedding. The full UNet model with attention and timestep embedding. :param in_channels: channels in the input Tensor. :param
:param in_channels: channels in the input Tensor. model_channels: base channel count for the model. :param out_channels: channels in the output Tensor. :param
:param model_channels: base channel count for the model. num_res_blocks: number of residual blocks per downsample. :param attention_resolutions: a collection of downsample
:param out_channels: channels in the output Tensor. rates at which
:param num_res_blocks: number of residual blocks per downsample. attention will take place. May be a set, list, or tuple. For example, if this contains 4, then at 4x
:param attention_resolutions: a collection of downsample rates at which downsampling, attention will be used.
attention will take place. May be a set, list, or tuple. :param dropout: the dropout probability. :param channel_mult: channel multiplier for each level of the UNet. :param
For example, if this contains 4, then at 4x downsampling, attention conv_resample: if True, use learned convolutions for upsampling and
will be used.
:param dropout: the dropout probability.
:param channel_mult: channel multiplier for each level of the UNet.
:param conv_resample: if True, use learned convolutions for upsampling and
downsampling. downsampling.
:param dims: determines if the signal is 1D, 2D, or 3D. :param dims: determines if the signal is 1D, 2D, or 3D. :param num_classes: if specified (as an int), then this
:param num_classes: if specified (as an int), then this model will be model will be
class-conditional with `num_classes` classes. class-conditional with `num_classes` classes.
:param use_checkpoint: use gradient checkpointing to reduce memory usage. :param use_checkpoint: use gradient checkpointing to reduce memory usage. :param num_heads: the number of attention
:param num_heads: the number of attention heads in each attention layer. heads in each attention layer. :param num_heads_channels: if specified, ignore num_heads and instead use
:param num_heads_channels: if specified, ignore num_heads and instead use
a fixed channel width per attention head. a fixed channel width per attention head.
:param num_heads_upsample: works with num_heads to set a different number :param num_heads_upsample: works with num_heads to set a different number
of heads for upsampling. Deprecated. of heads for upsampling. Deprecated.
:param use_scale_shift_norm: use a FiLM-like conditioning mechanism. :param use_scale_shift_norm: use a FiLM-like conditioning mechanism. :param resblock_updown: use residual blocks
:param resblock_updown: use residual blocks for up/downsampling. for up/downsampling. :param use_new_attention_order: use a different attention pattern for potentially
:param use_new_attention_order: use a different attention pattern for potentially
increased efficiency. increased efficiency.
""" """
...@@ -933,12 +929,9 @@ class UNetLDMModel(ModelMixin, ConfigMixin): ...@@ -933,12 +929,9 @@ class UNetLDMModel(ModelMixin, ConfigMixin):
def forward(self, x, timesteps=None, context=None, y=None, **kwargs): def forward(self, x, timesteps=None, context=None, y=None, **kwargs):
""" """
Apply the model to an input batch. Apply the model to an input batch. :param x: an [N x C x ...] Tensor of inputs. :param timesteps: a 1-D batch
:param x: an [N x C x ...] Tensor of inputs. of timesteps. :param context: conditioning plugged in via crossattn :param y: an [N] Tensor of labels, if
:param timesteps: a 1-D batch of timesteps. class-conditional. :return: an [N x C x ...] Tensor of outputs.
:param context: conditioning plugged in via crossattn
:param y: an [N] Tensor of labels, if class-conditional.
:return: an [N x C x ...] Tensor of outputs.
""" """
assert (y is not None) == ( assert (y is not None) == (
self.num_classes is not None self.num_classes is not None
...@@ -970,8 +963,7 @@ class UNetLDMModel(ModelMixin, ConfigMixin): ...@@ -970,8 +963,7 @@ class UNetLDMModel(ModelMixin, ConfigMixin):
class EncoderUNetModel(nn.Module): class EncoderUNetModel(nn.Module):
""" """
The half UNet model with attention and timestep embedding. The half UNet model with attention and timestep embedding. For usage, see UNet.
For usage, see UNet.
""" """
def __init__( def __init__(
...@@ -1157,10 +1149,8 @@ class EncoderUNetModel(nn.Module): ...@@ -1157,10 +1149,8 @@ class EncoderUNetModel(nn.Module):
def forward(self, x, timesteps): def forward(self, x, timesteps):
""" """
Apply the model to an input batch. Apply the model to an input batch. :param x: an [N x C x ...] Tensor of inputs. :param timesteps: a 1-D batch
:param x: an [N x C x ...] Tensor of inputs. of timesteps. :return: an [N x K] Tensor of outputs.
:param timesteps: a 1-D batch of timesteps.
:return: an [N x K] Tensor of outputs.
""" """
emb = self.time_embed( emb = self.time_embed(
get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0) get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0)
......
src/diffusers/models/unet_rl.py
View file @ 26ea58d4
...@@ -5,18 +5,18 @@ import math ...@@ -5,18 +5,18 @@ import math
import torch import torch
import torch.nn as nn import torch.nn as nn
try:
import einops
from einops.layers.torch import Rearrange
except:
print("Einops is not installed")
pass
from ..configuration_utils import ConfigMixin from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin from ..modeling_utils import ModelMixin
# try:
# import einops
# from einops.layers.torch import Rearrange
# except:
# print("Einops is not installed")
# pass
class SinusoidalPosEmb(nn.Module): class SinusoidalPosEmb(nn.Module):
def __init__(self, dim): def __init__(self, dim):
super().__init__() super().__init__()
...@@ -50,6 +50,21 @@ class Upsample1d(nn.Module): ...@@ -50,6 +50,21 @@ class Upsample1d(nn.Module):
return self.conv(x) return self.conv(x)
class RearrangeDim(nn.Module):
def __init__(self):
super().__init__()
def forward(self, tensor):
if len(tensor.shape) == 2:
return tensor[:, :, None]
if len(tensor.shape) == 3:
return tensor[:, :, None, :]
elif len(tensor.shape) == 4:
return tensor[:, :, 0, :]
else:
raise ValueError(f"`len(tensor)`: {len(tensor)} has to be 2, 3 or 4.")
class Conv1dBlock(nn.Module): class Conv1dBlock(nn.Module):
""" """
Conv1d --> GroupNorm --> Mish Conv1d --> GroupNorm --> Mish
...@@ -60,9 +75,11 @@ class Conv1dBlock(nn.Module): ...@@ -60,9 +75,11 @@ class Conv1dBlock(nn.Module):
self.block = nn.Sequential( self.block = nn.Sequential(
nn.Conv1d(inp_channels, out_channels, kernel_size, padding=kernel_size // 2), nn.Conv1d(inp_channels, out_channels, kernel_size, padding=kernel_size // 2),
Rearrange("batch channels horizon -> batch channels 1 horizon"), RearrangeDim(),
# Rearrange("batch channels horizon -> batch channels 1 horizon"),
nn.GroupNorm(n_groups, out_channels), nn.GroupNorm(n_groups, out_channels),
Rearrange("batch channels 1 horizon -> batch channels horizon"), RearrangeDim(),
# Rearrange("batch channels 1 horizon -> batch channels horizon"),
nn.Mish(), nn.Mish(),
) )
...@@ -84,7 +101,8 @@ class ResidualTemporalBlock(nn.Module): ...@@ -84,7 +101,8 @@ class ResidualTemporalBlock(nn.Module):
self.time_mlp = nn.Sequential( self.time_mlp = nn.Sequential(
nn.Mish(), nn.Mish(),
nn.Linear(embed_dim, out_channels), nn.Linear(embed_dim, out_channels),
Rearrange("batch t -> batch t 1"), RearrangeDim(),
# Rearrange("batch t -> batch t 1"),
) )
self.residual_conv = ( self.residual_conv = (
...@@ -93,10 +111,8 @@ class ResidualTemporalBlock(nn.Module): ...@@ -93,10 +111,8 @@ class ResidualTemporalBlock(nn.Module):
def forward(self, x, t): def forward(self, x, t):
""" """
x : [ batch_size x inp_channels x horizon ] x : [ batch_size x inp_channels x horizon ] t : [ batch_size x embed_dim ] returns: out : [ batch_size x
t : [ batch_size x embed_dim ] out_channels x horizon ]
returns:
out : [ batch_size x out_channels x horizon ]
""" """
out = self.blocks[0](x) + self.time_mlp(t) out = self.blocks[0](x) + self.time_mlp(t)
out = self.blocks[1](out) out = self.blocks[1](out)
...@@ -184,7 +200,8 @@ class TemporalUNet(ModelMixin, ConfigMixin): # (nn.Module): ...@@ -184,7 +200,8 @@ class TemporalUNet(ModelMixin, ConfigMixin): # (nn.Module):
x : [ batch x horizon x transition ] x : [ batch x horizon x transition ]
""" """
x = einops.rearrange(x, "b h t -> b t h") # x = einops.rearrange(x, "b h t -> b t h")
x = x.permute(0, 2, 1)
t = self.time_mlp(time) t = self.time_mlp(time)
h = [] h = []
...@@ -206,7 +223,8 @@ class TemporalUNet(ModelMixin, ConfigMixin): # (nn.Module): ...@@ -206,7 +223,8 @@ class TemporalUNet(ModelMixin, ConfigMixin): # (nn.Module):
x = self.final_conv(x) x = self.final_conv(x)
x = einops.rearrange(x, "b t h -> b h t") # x = einops.rearrange(x, "b t h -> b h t")
x = x.permute(0, 2, 1)
return x return x
...@@ -263,7 +281,8 @@ class TemporalValue(nn.Module): ...@@ -263,7 +281,8 @@ class TemporalValue(nn.Module):
x : [ batch x horizon x transition ] x : [ batch x horizon x transition ]
""" """
x = einops.rearrange(x, "b h t -> b t h") # x = einops.rearrange(x, "b h t -> b t h")
x = x.permute(0, 2, 1)
t = self.time_mlp(time) t = self.time_mlp(time)
......
src/diffusers/models/unet_sde_score_estimation.py
View file @ 26ea58d4
...@@ -136,26 +136,21 @@ def naive_downsample_2d(x, factor=2): ...@@ -136,26 +136,21 @@ def naive_downsample_2d(x, factor=2):
def upsample_conv_2d(x, w, k=None, factor=2, gain=1): def upsample_conv_2d(x, w, k=None, factor=2, gain=1):
"""Fused `upsample_2d()` followed by `tf.nn.conv2d()`. """Fused `upsample_2d()` followed by `tf.nn.conv2d()`.
Padding is performed only once at the beginning, not between the
operations.
The fused op is considerably more efficient than performing the same
calculation
using standard TensorFlow ops. It supports gradients of arbitrary order.
Args: Args:
Padding is performed only once at the beginning, not between the operations. The fused op is considerably more
efficient than performing the same calculation using standard TensorFlow ops. It supports gradients of arbitrary
order.
x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W, x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W,
C]`. C]`.
w: Weight tensor of the shape `[filterH, filterW, inChannels, w: Weight tensor of the shape `[filterH, filterW, inChannels,
outChannels]`. Grouped convolution can be performed by `inChannels = outChannels]`. Grouped convolution can be performed by `inChannels = x.shape[0] // numGroups`.
x.shape[0] // numGroups`.
k: FIR filter of the shape `[firH, firW]` or `[firN]` k: FIR filter of the shape `[firH, firW]` or `[firN]`
(separable). The default is `[1] * factor`, which corresponds to (separable). The default is `[1] * factor`, which corresponds to nearest-neighbor upsampling.
nearest-neighbor upsampling. factor: Integer upsampling factor (default: 2). gain: Scaling factor for signal magnitude (default: 1.0).
factor: Integer upsampling factor (default: 2).
gain: Scaling factor for signal magnitude (default: 1.0).
Returns: Returns:
Tensor of the shape `[N, C, H * factor, W * factor]` or Tensor of the shape `[N, C, H * factor, W * factor]` or `[N, H * factor, W * factor, C]`, and same datatype as
`[N, H * factor, W * factor, C]`, and same datatype as `x`. `x`.
""" """
assert isinstance(factor, int) and factor >= 1 assert isinstance(factor, int) and factor >= 1
...@@ -208,25 +203,21 @@ def upsample_conv_2d(x, w, k=None, factor=2, gain=1): ...@@ -208,25 +203,21 @@ def upsample_conv_2d(x, w, k=None, factor=2, gain=1):
def conv_downsample_2d(x, w, k=None, factor=2, gain=1): def conv_downsample_2d(x, w, k=None, factor=2, gain=1):
"""Fused `tf.nn.conv2d()` followed by `downsample_2d()`. """Fused `tf.nn.conv2d()` followed by `downsample_2d()`.
Padding is performed only once at the beginning, not between the operations.
The fused op is considerably more efficient than performing the same
calculation
using standard TensorFlow ops. It supports gradients of arbitrary order.
Args: Args:
Padding is performed only once at the beginning, not between the operations. The fused op is considerably more
efficient than performing the same calculation using standard TensorFlow ops. It supports gradients of arbitrary
order.
x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W, x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W,
C]`. C]`.
w: Weight tensor of the shape `[filterH, filterW, inChannels, w: Weight tensor of the shape `[filterH, filterW, inChannels,
outChannels]`. Grouped convolution can be performed by `inChannels = outChannels]`. Grouped convolution can be performed by `inChannels = x.shape[0] // numGroups`.
x.shape[0] // numGroups`.
k: FIR filter of the shape `[firH, firW]` or `[firN]` k: FIR filter of the shape `[firH, firW]` or `[firN]`
(separable). The default is `[1] * factor`, which corresponds to (separable). The default is `[1] * factor`, which corresponds to average pooling.
average pooling. factor: Integer downsampling factor (default: 2). gain: Scaling factor for signal magnitude (default: 1.0).
factor: Integer downsampling factor (default: 2).
gain: Scaling factor for signal magnitude (default: 1.0).
Returns: Returns:
Tensor of the shape `[N, C, H // factor, W // factor]` or Tensor of the shape `[N, C, H // factor, W // factor]` or `[N, H // factor, W // factor, C]`, and same datatype
`[N, H // factor, W // factor, C]`, and same datatype as `x`. as `x`.
""" """
assert isinstance(factor, int) and factor >= 1 assert isinstance(factor, int) and factor >= 1
...@@ -258,22 +249,16 @@ def _shape(x, dim): ...@@ -258,22 +249,16 @@ def _shape(x, dim):
def upsample_2d(x, k=None, factor=2, gain=1): def upsample_2d(x, k=None, factor=2, gain=1):
r"""Upsample a batch of 2D images with the given filter. r"""Upsample a batch of 2D images with the given filter.
Accepts a batch of 2D images of the shape `[N, C, H, W]` or `[N, H, W, C]`
and upsamples each image with the given filter. The filter is normalized so
that
if the input pixels are constant, they will be scaled by the specified
`gain`.
Pixels outside the image are assumed to be zero, and the filter is padded
with
zeros so that its shape is a multiple of the upsampling factor.
Args: Args:
Accepts a batch of 2D images of the shape `[N, C, H, W]` or `[N, H, W, C]` and upsamples each image with the given
filter. The filter is normalized so that if the input pixels are constant, they will be scaled by the specified
`gain`. Pixels outside the image are assumed to be zero, and the filter is padded with zeros so that its shape is a:
multiple of the upsampling factor.
x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W, x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W,
C]`. C]`.
k: FIR filter of the shape `[firH, firW]` or `[firN]` k: FIR filter of the shape `[firH, firW]` or `[firN]`
(separable). The default is `[1] * factor`, which corresponds to (separable). The default is `[1] * factor`, which corresponds to nearest-neighbor upsampling.
nearest-neighbor upsampling. factor: Integer upsampling factor (default: 2). gain: Scaling factor for signal magnitude (default: 1.0).
factor: Integer upsampling factor (default: 2).
gain: Scaling factor for signal magnitude (default: 1.0).
Returns: Returns:
Tensor of the shape `[N, C, H * factor, W * factor]` Tensor of the shape `[N, C, H * factor, W * factor]`
...@@ -289,22 +274,16 @@ def upsample_2d(x, k=None, factor=2, gain=1): ...@@ -289,22 +274,16 @@ def upsample_2d(x, k=None, factor=2, gain=1):
def downsample_2d(x, k=None, factor=2, gain=1): def downsample_2d(x, k=None, factor=2, gain=1):
r"""Downsample a batch of 2D images with the given filter. r"""Downsample a batch of 2D images with the given filter.
Accepts a batch of 2D images of the shape `[N, C, H, W]` or `[N, H, W, C]`
and downsamples each image with the given filter. The filter is normalized
so that
if the input pixels are constant, they will be scaled by the specified
`gain`.
Pixels outside the image are assumed to be zero, and the filter is padded
with
zeros so that its shape is a multiple of the downsampling factor.
Args: Args:
Accepts a batch of 2D images of the shape `[N, C, H, W]` or `[N, H, W, C]` and downsamples each image with the
given filter. The filter is normalized so that if the input pixels are constant, they will be scaled by the
specified `gain`. Pixels outside the image are assumed to be zero, and the filter is padded with zeros so that its
shape is a multiple of the downsampling factor.
x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W, x: Input tensor of the shape `[N, C, H, W]` or `[N, H, W,
C]`. C]`.
k: FIR filter of the shape `[firH, firW]` or `[firN]` k: FIR filter of the shape `[firH, firW]` or `[firN]`
(separable). The default is `[1] * factor`, which corresponds to (separable). The default is `[1] * factor`, which corresponds to average pooling.
average pooling. factor: Integer downsampling factor (default: 2). gain: Scaling factor for signal magnitude (default: 1.0).
factor: Integer downsampling factor (default: 2).
gain: Scaling factor for signal magnitude (default: 1.0).
Returns: Returns:
Tensor of the shape `[N, C, H // factor, W // factor]` Tensor of the shape `[N, C, H // factor, W // factor]`
......
src/diffusers/pipelines/grad_tts_utils.py
View file @ 26ea58d4
...@@ -290,7 +290,7 @@ def normalize_numbers(text): ...@@ -290,7 +290,7 @@ def normalize_numbers(text):
return text return text
""" from https://github.com/keithito/tacotron """ """ from https://github.com/keithito/tacotron"""
_pad = "_" _pad = "_"
...@@ -322,8 +322,8 @@ def get_arpabet(word, dictionary): ...@@ -322,8 +322,8 @@ def get_arpabet(word, dictionary):
def text_to_sequence(text, cleaner_names=[english_cleaners], dictionary=None): def text_to_sequence(text, cleaner_names=[english_cleaners], dictionary=None):
"""Converts a string of text to a sequence of IDs corresponding to the symbols in the text. """Converts a string of text to a sequence of IDs corresponding to the symbols in the text.
The text can optionally have ARPAbet sequences enclosed in curly braces embedded The text can optionally have ARPAbet sequences enclosed in curly braces embedded in it. For example, "Turn left on
in it. For example, "Turn left on {HH AW1 S S T AH0 N} Street." {HH AW1 S S T AH0 N} Street."
Args: Args:
text: string to convert to a sequence text: string to convert to a sequence
......
src/diffusers/pipelines/pipeline_bddm.py
View file @ 26ea58d4
...@@ -29,8 +29,7 @@ from ..pipeline_utils import DiffusionPipeline ...@@ -29,8 +29,7 @@ from ..pipeline_utils import DiffusionPipeline
def calc_diffusion_step_embedding(diffusion_steps, diffusion_step_embed_dim_in): def calc_diffusion_step_embedding(diffusion_steps, diffusion_step_embed_dim_in):
""" """
Embed a diffusion step $t$ into a higher dimensional space Embed a diffusion step $t$ into a higher dimensional space
E.g. the embedding vector in the 128-dimensional space is E.g. the embedding vector in the 128-dimensional space is [sin(t * 10^(0*4/63)), ... , sin(t * 10^(63*4/63)),
[sin(t * 10^(0*4/63)), ... , sin(t * 10^(63*4/63)),
cos(t * 10^(0*4/63)), ... , cos(t * 10^(63*4/63))] cos(t * 10^(0*4/63)), ... , cos(t * 10^(63*4/63))]
Parameters: Parameters:
...@@ -53,8 +52,7 @@ def calc_diffusion_step_embedding(diffusion_steps, diffusion_step_embed_dim_in): ...@@ -53,8 +52,7 @@ def calc_diffusion_step_embedding(diffusion_steps, diffusion_step_embed_dim_in):
""" """
Below scripts were borrowed from Below scripts were borrowed from https://github.com/philsyn/DiffWave-Vocoder/blob/master/WaveNet.py
https://github.com/philsyn/DiffWave-Vocoder/blob/master/WaveNet.py
""" """
......
src/diffusers/pipelines/pipeline_glide.py
View file @ 26ea58d4
...@@ -699,9 +699,8 @@ def _extract_into_tensor(arr, timesteps, broadcast_shape): ...@@ -699,9 +699,8 @@ def _extract_into_tensor(arr, timesteps, broadcast_shape):
""" """
Extract values from a 1-D numpy array for a batch of indices. Extract values from a 1-D numpy array for a batch of indices.
:param arr: the 1-D numpy array. :param arr: the 1-D numpy array. :param timesteps: a tensor of indices into the array to extract. :param
:param timesteps: a tensor of indices into the array to extract. broadcast_shape: a larger shape of K dimensions with the batch
:param broadcast_shape: a larger shape of K dimensions with the batch
dimension equal to the length of timesteps. dimension equal to the length of timesteps.
:return: a tensor of shape [batch_size, 1, ...] where the shape has K dims. :return: a tensor of shape [batch_size, 1, ...] where the shape has K dims.
""" """
......
src/diffusers/pipelines/pipeline_grad_tts.py
View file @ 26ea58d4
""" from https://github.com/jaywalnut310/glow-tts """ """ from https://github.com/jaywalnut310/glow-tts"""
import math import math
......
src/diffusers/pipelines/pipeline_latent_diffusion.py
View file @ 26ea58d4
...@@ -554,11 +554,9 @@ class LDMBertModel(LDMBertPreTrainedModel): ...@@ -554,11 +554,9 @@ class LDMBertModel(LDMBertPreTrainedModel):
def get_timestep_embedding(timesteps, embedding_dim): def get_timestep_embedding(timesteps, embedding_dim):
""" """
This matches the implementation in Denoising Diffusion Probabilistic Models: This matches the implementation in Denoising Diffusion Probabilistic Models: From Fairseq. Build sinusoidal
From Fairseq. embeddings. This matches the implementation in tensor2tensor, but differs slightly from the description in Section
Build sinusoidal embeddings. 3.5 of "Attention Is All You Need".
This matches the implementation in tensor2tensor, but differs slightly
from the description in Section 3.5 of "Attention Is All You Need".
""" """
assert len(timesteps.shape) == 1 assert len(timesteps.shape) == 1
...@@ -1055,8 +1053,8 @@ class Decoder(nn.Module): ...@@ -1055,8 +1053,8 @@ class Decoder(nn.Module):
class VectorQuantizer(nn.Module): class VectorQuantizer(nn.Module):
""" """
Improved version over VectorQuantizer, can be used as a drop-in replacement. Mostly Improved version over VectorQuantizer, can be used as a drop-in replacement. Mostly avoids costly matrix
avoids costly matrix multiplications and allows for post-hoc remapping of indices. multiplications and allows for post-hoc remapping of indices.
""" """
# NOTE: due to a bug the beta term was applied to the wrong term. for # NOTE: due to a bug the beta term was applied to the wrong term. for
......
src/diffusers/schedulers/scheduling_ddim.py
View file @ 26ea58d4
...@@ -25,13 +25,12 @@ from .scheduling_utils import SchedulerMixin ...@@ -25,13 +25,12 @@ from .scheduling_utils import SchedulerMixin
def betas_for_alpha_bar(num_diffusion_timesteps, max_beta=0.999): def betas_for_alpha_bar(num_diffusion_timesteps, max_beta=0.999):
""" """
Create a beta schedule that discretizes the given alpha_t_bar function, Create a beta schedule that discretizes the given alpha_t_bar function, which defines the cumulative product of
which defines the cumulative product of (1-beta) over time from t = [0,1]. (1-beta) over time from t = [0,1].
:param num_diffusion_timesteps: the number of betas to produce. :param num_diffusion_timesteps: the number of betas to produce. :param alpha_bar: a lambda that takes an argument t
:param alpha_bar: a lambda that takes an argument t from 0 to 1 and from 0 to 1 and
produces the cumulative product of (1-beta) up to that produces the cumulative product of (1-beta) up to that part of the diffusion process.
part of the diffusion process.
:param max_beta: the maximum beta to use; use values lower than 1 to :param max_beta: the maximum beta to use; use values lower than 1 to
prevent singularities. prevent singularities.
""" """
......
src/diffusers/schedulers/scheduling_ddpm.py
View file @ 26ea58d4
...@@ -25,13 +25,12 @@ from .scheduling_utils import SchedulerMixin ...@@ -25,13 +25,12 @@ from .scheduling_utils import SchedulerMixin
def betas_for_alpha_bar(num_diffusion_timesteps, max_beta=0.999): def betas_for_alpha_bar(num_diffusion_timesteps, max_beta=0.999):
""" """
Create a beta schedule that discretizes the given alpha_t_bar function, Create a beta schedule that discretizes the given alpha_t_bar function, which defines the cumulative product of
which defines the cumulative product of (1-beta) over time from t = [0,1]. (1-beta) over time from t = [0,1].
:param num_diffusion_timesteps: the number of betas to produce. :param num_diffusion_timesteps: the number of betas to produce. :param alpha_bar: a lambda that takes an argument t
:param alpha_bar: a lambda that takes an argument t from 0 to 1 and from 0 to 1 and
produces the cumulative product of (1-beta) up to that produces the cumulative product of (1-beta) up to that part of the diffusion process.
part of the diffusion process.
:param max_beta: the maximum beta to use; use values lower than 1 to :param max_beta: the maximum beta to use; use values lower than 1 to
prevent singularities. prevent singularities.
""" """
...@@ -144,16 +143,12 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin): ...@@ -144,16 +143,12 @@ class DDPMScheduler(SchedulerMixin, ConfigMixin):
return pred_prev_sample return pred_prev_sample
def training_step(self, original_samples: torch.Tensor, noise: torch.Tensor, timesteps: torch.Tensor): def training_step(self, original_samples: torch.Tensor, noise: torch.Tensor, timesteps: torch.Tensor):
if timesteps.dim() != 1:
raise ValueError("`timesteps` must be a 1D tensor")
device = original_samples.device
batch_size = original_samples.shape[0]
timesteps = timesteps.reshape(batch_size, 1, 1, 1)
sqrt_alpha_prod = self.alphas_cumprod[timesteps] ** 0.5 sqrt_alpha_prod = self.alphas_cumprod[timesteps] ** 0.5
sqrt_alpha_prod = self.match_shape(sqrt_alpha_prod, original_samples)
sqrt_one_minus_alpha_prod = (1 - self.alphas_cumprod[timesteps]) ** 0.5 sqrt_one_minus_alpha_prod = (1 - self.alphas_cumprod[timesteps]) ** 0.5
noisy_samples = sqrt_alpha_prod.to(device) * original_samples + sqrt_one_minus_alpha_prod.to(device) * noise sqrt_one_minus_alpha_prod = self.match_shape(sqrt_one_minus_alpha_prod, original_samples)
noisy_samples = sqrt_alpha_prod * original_samples + sqrt_one_minus_alpha_prod * noise
return noisy_samples return noisy_samples
def __len__(self): def __len__(self):
......
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