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Commit 02a76c2c authored by Patrick von Platen's avatar Patrick von Platen
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consolidate timestep embeds

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src/diffusers/models/embeddings.py
View file @ 02a76c2c
......@@ -11,49 +11,104 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import torch
import math
import numpy as np
from torch import nn
import torch.nn.functional as F
# unet.py
def get_timestep_embedding(timesteps, embedding_dim):
def get_timestep_embedding(timesteps, embedding_dim, flip_sin_to_cos=False, downscale_freq_shift=1, max_period=10000):
"""
This matches the implementation in Denoising Diffusion Probabilistic Models:
From Fairseq.
Build sinusoidal embeddings.
This matches the implementation in tensor2tensor, but differs slightly
from the description in Section 3.5 of "Attention Is All You Need".
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional.
:param embedding_dim: the dimension of the output.
:param max_period: controls the minimum frequency of the embeddings.
:return: an [N x dim] Tensor of positional embeddings.
"""
assert len(timesteps.shape) == 1
half_dim = embedding_dim // 2
emb = math.log(10000) / (half_dim - 1)
emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb)
emb = torch.exp(-math.log(max_period) * torch.arange(half_dim, dtype=torch.float32) / (embedding_dim // 2 - downscale_freq_shift))
emb = emb.to(device=timesteps.device)
emb = timesteps.float()[:, None] * emb[None, :]
emb = timesteps[:, None].float() * emb[None, :]
# concat sine and cosine embeddings
emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
if embedding_dim % 2 == 1: # zero pad
# flip sine and cosine embeddings
if flip_sin_to_cos:
emb = torch.cat([emb[:, half_dim:], emb[:, :half_dim]], dim=-1)
# zero pad
if embedding_dim % 2 == 1:
emb = torch.nn.functional.pad(emb, (0, 1, 0, 0))
return emb
# unet_glide.py
def timestep_embedding(timesteps, dim, max_period=10000):
"""
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional.
:param dim: the dimension of the output.
:param max_period: controls the minimum frequency of the embeddings.
:return: an [N x dim] Tensor of positional embeddings.
"""
half = dim // 2
freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
device=timesteps.device
)
args = timesteps[:, None].float() * freqs[None]
embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
if dim % 2:
embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
return embedding
#def get_timestep_embedding(timesteps, embedding_dim):
# """
# This matches the implementation in Denoising Diffusion Probabilistic Models:
# From Fairseq.
# Build sinusoidal embeddings.
# 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
#
# half_dim = embedding_dim // 2
# emb = math.log(10000) / (half_dim - 1)
# emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb)
# emb = emb.to(device=timesteps.device)
# emb = timesteps.float()[:, None] * emb[None, :]
# emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
# if embedding_dim % 2 == 1: # zero pad
# emb = torch.nn.functional.pad(emb, (0, 1, 0, 0))
#def timestep_embedding(timesteps, dim, max_period=10000):
# """
# Create sinusoidal timestep embeddings.
#
# :param timesteps: a 1-D Tensor of N indices, one per batch element.
# These may be fractional.
# :param dim: the dimension of the output.
# :param max_period: controls the minimum frequency of the embeddings.
# :return: an [N x dim] Tensor of positional embeddings.
# """
# half = dim // 2
# freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
# device=timesteps.device
# )
# args = timesteps[:, None].float() * freqs[None, :]
# embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
# if dim % 2:
# embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
# return embedding
#def a_get_timestep_embedding(timesteps, embedding_dim, max_positions=10000):
# assert len(timesteps.shape) == 1 # and timesteps.dtype == tf.int32
# half_dim = embedding_dim // 2
# magic number 10000 is from transformers
# emb = math.log(max_positions) / (half_dim - 1)
# emb = math.log(2.) / (half_dim - 1)
# emb = torch.exp(torch.arange(half_dim, dtype=torch.float32, device=timesteps.device) * -emb)
# emb = tf.range(num_embeddings, dtype=jnp.float32)[:, None] * emb[None, :]
# emb = tf.cast(timesteps, dtype=jnp.float32)[:, None] * emb[None, :]
# emb = timesteps.float()[:, None] * emb[None, :]
# emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
# if embedding_dim % 2 == 1: # zero pad
# emb = F.pad(emb, (0, 1), mode="constant")
# assert emb.shape == (timesteps.shape[0], embedding_dim)
# return emb
# unet_grad_tts.py
class SinusoidalPosEmb(torch.nn.Module):
......@@ -70,26 +125,6 @@ class SinusoidalPosEmb(torch.nn.Module):
emb = torch.cat((emb.sin(), emb.cos()), dim=-1)
return emb
# unet_ldm.py
def timestep_embedding(timesteps, dim, max_period=10000):
"""
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional.
:param dim: the dimension of the output.
:param max_period: controls the minimum frequency of the embeddings.
:return: an [N x dim] Tensor of positional embeddings.
"""
half = dim // 2
freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
device=timesteps.device
)
args = timesteps[:, None].float() * freqs[None]
embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
if dim % 2:
embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
return embedding
# unet_rl.py
class SinusoidalPosEmb(nn.Module):
......@@ -106,22 +141,6 @@ class SinusoidalPosEmb(nn.Module):
emb = torch.cat((emb.sin(), emb.cos()), dim=-1)
return emb
# unet_sde_score_estimation.py
def get_timestep_embedding(timesteps, embedding_dim, max_positions=10000):
assert len(timesteps.shape) == 1 # and timesteps.dtype == tf.int32
half_dim = embedding_dim // 2
# magic number 10000 is from transformers
emb = math.log(max_positions) / (half_dim - 1)
# emb = math.log(2.) / (half_dim - 1)
emb = torch.exp(torch.arange(half_dim, dtype=torch.float32, device=timesteps.device) * -emb)
# emb = tf.range(num_embeddings, dtype=jnp.float32)[:, None] * emb[None, :]
# emb = tf.cast(timesteps, dtype=jnp.float32)[:, None] * emb[None, :]
emb = timesteps.float()[:, None] * emb[None, :]
emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
if embedding_dim % 2 == 1: # zero pad
emb = F.pad(emb, (0, 1), mode="constant")
assert emb.shape == (timesteps.shape[0], embedding_dim)
return emb
# unet_sde_score_estimation.py
class GaussianFourierProjection(nn.Module):
......
src/diffusers/models/unet.py
View file @ 02a76c2c
......@@ -30,27 +30,28 @@ from tqdm import tqdm
from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin
def get_timestep_embedding(timesteps, embedding_dim):
"""
This matches the implementation in Denoising Diffusion Probabilistic Models:
From Fairseq.
Build sinusoidal embeddings.
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
half_dim = embedding_dim // 2
emb = math.log(10000) / (half_dim - 1)
emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb)
emb = emb.to(device=timesteps.device)
emb = timesteps.float()[:, None] * emb[None, :]
emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
if embedding_dim % 2 == 1: # zero pad
emb = torch.nn.functional.pad(emb, (0, 1, 0, 0))
return emb
from .embeddings import get_timestep_embedding
#def get_timestep_embedding(timesteps, embedding_dim):
# """
# This matches the implementation in Denoising Diffusion Probabilistic Models:
# From Fairseq.
# Build sinusoidal embeddings.
# 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
#
# half_dim = embedding_dim // 2
# emb = math.log(10000) / (half_dim - 1)
# emb = torch.exp(torch.arange(half_dim, dtype=torch.float32) * -emb)
# emb = emb.to(device=timesteps.device)
# emb = timesteps.float()[:, None] * emb[None, :]
# emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
# if embedding_dim % 2 == 1: # zero pad
# emb = torch.nn.functional.pad(emb, (0, 1, 0, 0))
# return emb
def nonlinearity(x):
......
src/diffusers/models/unet_glide.py
View file @ 02a76c2c
......@@ -7,6 +7,7 @@ import torch.nn.functional as F
from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin
from .embeddings import get_timestep_embedding
def convert_module_to_f16(l):
......@@ -86,25 +87,25 @@ def normalization(channels, swish=0.0):
return GroupNorm32(num_channels=channels, num_groups=32, swish=swish)
def timestep_embedding(timesteps, dim, max_period=10000):
"""
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional.
:param dim: the dimension of the output.
:param max_period: controls the minimum frequency of the embeddings.
:return: an [N x dim] Tensor of positional embeddings.
"""
half = dim // 2
freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
device=timesteps.device
)
args = timesteps[:, None].float() * freqs[None]
embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
if dim % 2:
embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
return embedding
# def timestep_embedding(timesteps, dim, max_period=10000):
# """
# Create sinusoidal timestep embeddings.
#
# :param timesteps: a 1-D Tensor of N indices, one per batch element.
# These may be fractional.
# :param dim: the dimension of the output.
# :param max_period: controls the minimum frequency of the embeddings.
# :return: an [N x dim] Tensor of positional embeddings.
# """
# half = dim // 2
# freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
# device=timesteps.device
# )
# args = timesteps[:, None].float() * freqs[None]
# embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
# if dim % 2:
# embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
# return embedding
def zero_module(module):
......@@ -627,7 +628,7 @@ class GlideUNetModel(ModelMixin, ConfigMixin):
"""
hs = []
emb = self.time_embed(timestep_embedding(timesteps, self.model_channels))
emb = self.time_embed(get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0))
h = x.type(self.dtype)
for module in self.input_blocks:
......@@ -714,7 +715,7 @@ class GlideTextToImageUNetModel(GlideUNetModel):
def forward(self, x, timesteps, transformer_out=None):
hs = []
emb = self.time_embed(timestep_embedding(timesteps, self.model_channels))
emb = self.time_embed(get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0))
# project the last token
transformer_proj = self.transformer_proj(transformer_out[:, -1])
......@@ -806,7 +807,7 @@ class GlideSuperResUNetModel(GlideUNetModel):
x = torch.cat([x, upsampled], dim=1)
hs = []
emb = self.time_embed(timestep_embedding(timesteps, self.model_channels))
emb = self.time_embed(get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0))
h = x
for module in self.input_blocks:
......
src/diffusers/models/unet_ldm.py
View file @ 02a76c2c
......@@ -16,6 +16,7 @@ except:
from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin
from .embeddings import get_timestep_embedding
def exists(val):
......@@ -316,34 +317,25 @@ def normalization(channels, swish=0.0):
return GroupNorm32(num_channels=channels, num_groups=32, swish=swish)
def timestep_embedding(timesteps, dim, max_period=10000):
"""
Create sinusoidal timestep embeddings.
:param timesteps: a 1-D Tensor of N indices, one per batch element.
These may be fractional.
:param dim: the dimension of the output.
:param max_period: controls the minimum frequency of the embeddings.
:return: an [N x dim] Tensor of positional embeddings.
"""
half = dim // 2
freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
device=timesteps.device
)
args = timesteps[:, None].float() * freqs[None]
embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
if dim % 2:
embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
return embedding
def zero_module(module):
"""
Zero out the parameters of a module and return it.
"""
for p in module.parameters():
p.detach().zero_()
return module
#def timestep_embedding(timesteps, dim, max_period=10000):
# """
# Create sinusoidal timestep embeddings.
#
# :param timesteps: a 1-D Tensor of N indices, one per batch element.
# These may be fractional.
# :param dim: the dimension of the output.
# :param max_period: controls the minimum frequency of the embeddings.
# :return: an [N x dim] Tensor of positional embeddings.
# """
# half = dim // 2
# freqs = torch.exp(-math.log(max_period) * torch.arange(start=0, end=half, dtype=torch.float32) / half).to(
# device=timesteps.device
# )
# args = timesteps[:, None].float() * freqs[None]
# embedding = torch.cat([torch.cos(args), torch.sin(args)], dim=-1)
# if dim % 2:
# embedding = torch.cat([embedding, torch.zeros_like(embedding[:, :1])], dim=-1)
# return embedding
## go
......@@ -1026,7 +1018,7 @@ class UNetLDMModel(ModelMixin, ConfigMixin):
hs = []
if not torch.is_tensor(timesteps):
timesteps = torch.tensor([timesteps], dtype=torch.long, device=x.device)
t_emb = timestep_embedding(timesteps, self.model_channels)
t_emb = get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0)
emb = self.time_embed(t_emb)
if self.num_classes is not None:
......@@ -1240,7 +1232,7 @@ class EncoderUNetModel(nn.Module):
:param timesteps: a 1-D batch of timesteps.
:return: an [N x K] Tensor of outputs.
"""
emb = self.time_embed(timestep_embedding(timesteps, self.model_channels))
emb = self.time_embed(get_timestep_embedding(timesteps, self.model_channels, flip_sin_to_cos=True, downscale_freq_shift=0))
results = []
h = x.type(self.dtype)
......
src/diffusers/models/unet_sde_score_estimation.py
View file @ 02a76c2c
......@@ -26,6 +26,7 @@ import torch.nn.functional as F
from ..configuration_utils import ConfigMixin
from ..modeling_utils import ModelMixin
from .embeddings import get_timestep_embedding
def upfirdn2d(input, kernel, up=1, down=1, pad=(0, 0)):
......@@ -381,21 +382,21 @@ def get_act(nonlinearity):
raise NotImplementedError("activation function does not exist!")
def get_timestep_embedding(timesteps, embedding_dim, max_positions=10000):
assert len(timesteps.shape) == 1 # and timesteps.dtype == tf.int32
half_dim = embedding_dim // 2
#def get_timestep_embedding(timesteps, embedding_dim, max_positions=10000):
# assert len(timesteps.shape) == 1 # and timesteps.dtype == tf.int32
# half_dim = embedding_dim // 2
# magic number 10000 is from transformers
emb = math.log(max_positions) / (half_dim - 1)
# emb = math.log(max_positions) / (half_dim - 1)
# emb = math.log(2.) / (half_dim - 1)
emb = torch.exp(torch.arange(half_dim, dtype=torch.float32, device=timesteps.device) * -emb)
# emb = torch.exp(torch.arange(half_dim, dtype=torch.float32, device=timesteps.device) * -emb)
# emb = tf.range(num_embeddings, dtype=jnp.float32)[:, None] * emb[None, :]
# emb = tf.cast(timesteps, dtype=jnp.float32)[:, None] * emb[None, :]
emb = timesteps.float()[:, None] * emb[None, :]
emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
if embedding_dim % 2 == 1: # zero pad
emb = F.pad(emb, (0, 1), mode="constant")
assert emb.shape == (timesteps.shape[0], embedding_dim)
return emb
# emb = timesteps.float()[:, None] * emb[None, :]
# emb = torch.cat([torch.sin(emb), torch.cos(emb)], dim=1)
# if embedding_dim % 2 == 1: # zero pad
# emb = F.pad(emb, (0, 1), mode="constant")
# assert emb.shape == (timesteps.shape[0], embedding_dim)
# return emb
def default_init(scale=1.0):
......
tests/test_layers_utils.py
View file @ 02a76c2c
......@@ -21,718 +21,24 @@ import unittest
import numpy as np
import torch
from diffusers import (
BDDMPipeline,
DDIMPipeline,
DDIMScheduler,
DDPMPipeline,
DDPMScheduler,
GlidePipeline,
GlideSuperResUNetModel,
GlideTextToImageUNetModel,
GradTTSPipeline,
GradTTSScheduler,
LatentDiffusionPipeline,
PNDMPipeline,
PNDMScheduler,
UNetGradTTSModel,
UNetLDMModel,
UNetModel,
)
from diffusers.configuration_utils import ConfigMixin
from diffusers.pipeline_utils import DiffusionPipeline
from diffusers.pipelines.pipeline_bddm import DiffWave
#from diffusers.models.embeddings import get_timestep_embedding, timestep_embedding, a_get_timestep_embedding
from diffusers.models.embeddings import get_timestep_embedding, timestep_embedding
from diffusers.testing_utils import floats_tensor, slow, torch_device
torch.backends.cuda.matmul.allow_tf32 = False
class ConfigTester(unittest.TestCase):
def test_load_not_from_mixin(self):
with self.assertRaises(ValueError):
ConfigMixin.from_config("dummy_path")
class EmbeddingsTests(unittest.TestCase):
def test_save_load(self):
class SampleObject(ConfigMixin):
config_name = "config.json"
def test_timestep_embeddings(self):
embedding_dim = 16
timesteps = torch.arange(10)
def __init__(
self,
a=2,
b=5,
c=(2, 5),
d="for diffusion",
e=[1, 3],
):
self.register_to_config(a=a, b=b, c=c, d=d, e=e)
t1 = get_timestep_embedding(timesteps, embedding_dim)
t2 = timestep_embedding(timesteps, embedding_dim)
t3 = get_timestep_embedding(timesteps, embedding_dim, flip_sin_to_cos=True, downscale_freq_factor=8)
obj = SampleObject()
config = obj.config
import ipdb; ipdb.set_trace()
assert config["a"] == 2
assert config["b"] == 5
assert config["c"] == (2, 5)
assert config["d"] == "for diffusion"
assert config["e"] == [1, 3]
with tempfile.TemporaryDirectory() as tmpdirname:
obj.save_config(tmpdirname)
new_obj = SampleObject.from_config(tmpdirname)
new_config = new_obj.config
# unfreeze configs
config = dict(config)
new_config = dict(new_config)
assert config.pop("c") == (2, 5) # instantiated as tuple
assert new_config.pop("c") == [2, 5] # saved & loaded as list because of json
assert config == new_config
class ModelTesterMixin:
def test_from_pretrained_save_pretrained(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
with tempfile.TemporaryDirectory() as tmpdirname:
model.save_pretrained(tmpdirname)
new_model = self.model_class.from_pretrained(tmpdirname)
new_model.to(torch_device)
with torch.no_grad():
image = model(**inputs_dict)
new_image = new_model(**inputs_dict)
max_diff = (image - new_image).abs().sum().item()
self.assertLessEqual(max_diff, 1e-5, "Models give different forward passes")
def test_determinism(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
with torch.no_grad():
first = model(**inputs_dict)
second = model(**inputs_dict)
out_1 = first.cpu().numpy()
out_2 = second.cpu().numpy()
out_1 = out_1[~np.isnan(out_1)]
out_2 = out_2[~np.isnan(out_2)]
max_diff = np.amax(np.abs(out_1 - out_2))
self.assertLessEqual(max_diff, 1e-5)
def test_output(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
with torch.no_grad():
output = model(**inputs_dict)
self.assertIsNotNone(output)
expected_shape = inputs_dict["x"].shape
self.assertEqual(output.shape, expected_shape, "Input and output shapes do not match")
def test_forward_signature(self):
init_dict, _ = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
signature = inspect.signature(model.forward)
# signature.parameters is an OrderedDict => so arg_names order is deterministic
arg_names = [*signature.parameters.keys()]
expected_arg_names = ["x", "timesteps"]
self.assertListEqual(arg_names[:2], expected_arg_names)
def test_model_from_config(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
# test if the model can be loaded from the config
# and has all the expected shape
with tempfile.TemporaryDirectory() as tmpdirname:
model.save_config(tmpdirname)
new_model = self.model_class.from_config(tmpdirname)
new_model.to(torch_device)
new_model.eval()
# check if all paramters shape are the same
for param_name in model.state_dict().keys():
param_1 = model.state_dict()[param_name]
param_2 = new_model.state_dict()[param_name]
self.assertEqual(param_1.shape, param_2.shape)
with torch.no_grad():
output_1 = model(**inputs_dict)
output_2 = new_model(**inputs_dict)
self.assertEqual(output_1.shape, output_2.shape)
def test_training(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.train()
output = model(**inputs_dict)
noise = torch.randn((inputs_dict["x"].shape[0],) + self.get_output_shape).to(torch_device)
loss = torch.nn.functional.mse_loss(output, noise)
loss.backward()
class UnetModelTests(ModelTesterMixin, unittest.TestCase):
model_class = UNetModel
@property
def dummy_input(self):
batch_size = 4
num_channels = 3
sizes = (32, 32)
noise = floats_tensor((batch_size, num_channels) + sizes).to(torch_device)
time_step = torch.tensor([10]).to(torch_device)
return {"x": noise, "timesteps": time_step}
@property
def get_input_shape(self):
return (3, 32, 32)
@property
def get_output_shape(self):
return (3, 32, 32)
def prepare_init_args_and_inputs_for_common(self):
init_dict = {
"ch": 32,
"ch_mult": (1, 2),
"num_res_blocks": 2,
"attn_resolutions": (16,),
"resolution": 32,
}
inputs_dict = self.dummy_input
return init_dict, inputs_dict
def test_from_pretrained_hub(self):
model, loading_info = UNetModel.from_pretrained("fusing/ddpm_dummy", output_loading_info=True)
self.assertIsNotNone(model)
self.assertEqual(len(loading_info["missing_keys"]), 0)
model.to(torch_device)
image = model(**self.dummy_input)
assert image is not None, "Make sure output is not None"
def test_output_pretrained(self):
model = UNetModel.from_pretrained("fusing/ddpm_dummy")
model.eval()
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(0)
noise = torch.randn(1, model.config.in_channels, model.config.resolution, model.config.resolution)
time_step = torch.tensor([10])
with torch.no_grad():
output = model(noise, time_step)
output_slice = output[0, -1, -3:, -3:].flatten()
# fmt: off
expected_output_slice = torch.tensor([0.2891, -0.1899, 0.2595, -0.6214, 0.0968, -0.2622, 0.4688, 0.1311, 0.0053])
# fmt: on
self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
class GlideSuperResUNetTests(ModelTesterMixin, unittest.TestCase):
model_class = GlideSuperResUNetModel
@property
def dummy_input(self):
batch_size = 4
num_channels = 6
sizes = (32, 32)
low_res_size = (4, 4)
noise = torch.randn((batch_size, num_channels // 2) + sizes).to(torch_device)
low_res = torch.randn((batch_size, 3) + low_res_size).to(torch_device)
time_step = torch.tensor([10] * noise.shape[0], device=torch_device)
return {"x": noise, "timesteps": time_step, "low_res": low_res}
@property
def get_input_shape(self):
return (3, 32, 32)
@property
def get_output_shape(self):
return (6, 32, 32)
def prepare_init_args_and_inputs_for_common(self):
init_dict = {
"attention_resolutions": (2,),
"channel_mult": (1, 2),
"in_channels": 6,
"out_channels": 6,
"model_channels": 32,
"num_head_channels": 8,
"num_heads_upsample": 1,
"num_res_blocks": 2,
"resblock_updown": True,
"resolution": 32,
"use_scale_shift_norm": True,
}
inputs_dict = self.dummy_input
return init_dict, inputs_dict
def test_output(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
with torch.no_grad():
output = model(**inputs_dict)
output, _ = torch.split(output, 3, dim=1)
self.assertIsNotNone(output)
expected_shape = inputs_dict["x"].shape
self.assertEqual(output.shape, expected_shape, "Input and output shapes do not match")
def test_from_pretrained_hub(self):
model, loading_info = GlideSuperResUNetModel.from_pretrained(
"fusing/glide-super-res-dummy", output_loading_info=True
)
self.assertIsNotNone(model)
self.assertEqual(len(loading_info["missing_keys"]), 0)
model.to(torch_device)
image = model(**self.dummy_input)
assert image is not None, "Make sure output is not None"
def test_output_pretrained(self):
model = GlideSuperResUNetModel.from_pretrained("fusing/glide-super-res-dummy")
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(0)
noise = torch.randn(1, 3, 64, 64)
low_res = torch.randn(1, 3, 4, 4)
time_step = torch.tensor([42] * noise.shape[0])
with torch.no_grad():
output = model(noise, time_step, low_res)
output, _ = torch.split(output, 3, dim=1)
output_slice = output[0, -1, -3:, -3:].flatten()
# fmt: off
expected_output_slice = torch.tensor([-22.8782, -23.2652, -15.3966, -22.8034, -23.3159, -15.5640, -15.3970, -15.4614, - 10.4370])
# fmt: on
self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
class GlideTextToImageUNetModelTests(ModelTesterMixin, unittest.TestCase):
model_class = GlideTextToImageUNetModel
@property
def dummy_input(self):
batch_size = 4
num_channels = 3
sizes = (32, 32)
transformer_dim = 32
seq_len = 16
noise = torch.randn((batch_size, num_channels) + sizes).to(torch_device)
emb = torch.randn((batch_size, seq_len, transformer_dim)).to(torch_device)
time_step = torch.tensor([10] * noise.shape[0], device=torch_device)
return {"x": noise, "timesteps": time_step, "transformer_out": emb}
@property
def get_input_shape(self):
return (3, 32, 32)
@property
def get_output_shape(self):
return (6, 32, 32)
def prepare_init_args_and_inputs_for_common(self):
init_dict = {
"attention_resolutions": (2,),
"channel_mult": (1, 2),
"in_channels": 3,
"out_channels": 6,
"model_channels": 32,
"num_head_channels": 8,
"num_heads_upsample": 1,
"num_res_blocks": 2,
"resblock_updown": True,
"resolution": 32,
"use_scale_shift_norm": True,
"transformer_dim": 32,
}
inputs_dict = self.dummy_input
return init_dict, inputs_dict
def test_output(self):
init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common()
model = self.model_class(**init_dict)
model.to(torch_device)
model.eval()
with torch.no_grad():
output = model(**inputs_dict)
output, _ = torch.split(output, 3, dim=1)
self.assertIsNotNone(output)
expected_shape = inputs_dict["x"].shape
self.assertEqual(output.shape, expected_shape, "Input and output shapes do not match")
def test_from_pretrained_hub(self):
model, loading_info = GlideTextToImageUNetModel.from_pretrained(
"fusing/unet-glide-text2im-dummy", output_loading_info=True
)
self.assertIsNotNone(model)
self.assertEqual(len(loading_info["missing_keys"]), 0)
model.to(torch_device)
image = model(**self.dummy_input)
assert image is not None, "Make sure output is not None"
def test_output_pretrained(self):
model = GlideTextToImageUNetModel.from_pretrained("fusing/unet-glide-text2im-dummy")
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(0)
noise = torch.randn((1, model.config.in_channels, model.config.resolution, model.config.resolution)).to(
torch_device
)
emb = torch.randn((1, 16, model.config.transformer_dim)).to(torch_device)
time_step = torch.tensor([10] * noise.shape[0], device=torch_device)
with torch.no_grad():
output = model(noise, time_step, emb)
output, _ = torch.split(output, 3, dim=1)
output_slice = output[0, -1, -3:, -3:].flatten()
# fmt: off
expected_output_slice = torch.tensor([2.7766, -10.3558, -14.9149, -0.9376, -14.9175, -17.7679, -5.5565, -12.9521, -12.9845])
# fmt: on
self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
class UNetLDMModelTests(ModelTesterMixin, unittest.TestCase):
model_class = UNetLDMModel
@property
def dummy_input(self):
batch_size = 4
num_channels = 4
sizes = (32, 32)
noise = floats_tensor((batch_size, num_channels) + sizes).to(torch_device)
time_step = torch.tensor([10]).to(torch_device)
return {"x": noise, "timesteps": time_step}
@property
def get_input_shape(self):
return (4, 32, 32)
@property
def get_output_shape(self):
return (4, 32, 32)
def prepare_init_args_and_inputs_for_common(self):
init_dict = {
"image_size": 32,
"in_channels": 4,
"out_channels": 4,
"model_channels": 32,
"num_res_blocks": 2,
"attention_resolutions": (16,),
"channel_mult": (1, 2),
"num_heads": 2,
"conv_resample": True,
}
inputs_dict = self.dummy_input
return init_dict, inputs_dict
def test_from_pretrained_hub(self):
model, loading_info = UNetLDMModel.from_pretrained("fusing/unet-ldm-dummy", output_loading_info=True)
self.assertIsNotNone(model)
self.assertEqual(len(loading_info["missing_keys"]), 0)
model.to(torch_device)
image = model(**self.dummy_input)
assert image is not None, "Make sure output is not None"
def test_output_pretrained(self):
model = UNetLDMModel.from_pretrained("fusing/unet-ldm-dummy")
model.eval()
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(0)
noise = torch.randn(1, model.config.in_channels, model.config.image_size, model.config.image_size)
time_step = torch.tensor([10] * noise.shape[0])
with torch.no_grad():
output = model(noise, time_step)
output_slice = output[0, -1, -3:, -3:].flatten()
# fmt: off
expected_output_slice = torch.tensor([-13.3258, -20.1100, -15.9873, -17.6617, -23.0596, -17.9419, -13.3675, -16.1889, -12.3800])
# fmt: on
self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
class UNetGradTTSModelTests(ModelTesterMixin, unittest.TestCase):
model_class = UNetGradTTSModel
@property
def dummy_input(self):
batch_size = 4
num_features = 32
seq_len = 16
noise = floats_tensor((batch_size, num_features, seq_len)).to(torch_device)
condition = floats_tensor((batch_size, num_features, seq_len)).to(torch_device)
mask = floats_tensor((batch_size, 1, seq_len)).to(torch_device)
time_step = torch.tensor([10] * batch_size).to(torch_device)
return {"x": noise, "timesteps": time_step, "mu": condition, "mask": mask}
@property
def get_input_shape(self):
return (4, 32, 16)
@property
def get_output_shape(self):
return (4, 32, 16)
def prepare_init_args_and_inputs_for_common(self):
init_dict = {
"dim": 64,
"groups": 4,
"dim_mults": (1, 2),
"n_feats": 32,
"pe_scale": 1000,
"n_spks": 1,
}
inputs_dict = self.dummy_input
return init_dict, inputs_dict
def test_from_pretrained_hub(self):
model, loading_info = UNetGradTTSModel.from_pretrained("fusing/unet-grad-tts-dummy", output_loading_info=True)
self.assertIsNotNone(model)
self.assertEqual(len(loading_info["missing_keys"]), 0)
model.to(torch_device)
image = model(**self.dummy_input)
assert image is not None, "Make sure output is not None"
def test_output_pretrained(self):
model = UNetGradTTSModel.from_pretrained("fusing/unet-grad-tts-dummy")
model.eval()
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(0)
num_features = model.config.n_feats
seq_len = 16
noise = torch.randn((1, num_features, seq_len))
condition = torch.randn((1, num_features, seq_len))
mask = torch.randn((1, 1, seq_len))
time_step = torch.tensor([10])
with torch.no_grad():
output = model(noise, time_step, condition, mask)
output_slice = output[0, -3:, -3:].flatten()
# fmt: off
expected_output_slice = torch.tensor([-0.0690, -0.0531, 0.0633, -0.0660, -0.0541, 0.0650, -0.0656, -0.0555, 0.0617])
# fmt: on
self.assertTrue(torch.allclose(output_slice, expected_output_slice, atol=1e-3))
class PipelineTesterMixin(unittest.TestCase):
def test_from_pretrained_save_pretrained(self):
# 1. Load models
model = UNetModel(ch=32, ch_mult=(1, 2), num_res_blocks=2, attn_resolutions=(16,), resolution=32)
schedular = DDPMScheduler(timesteps=10)
ddpm = DDPMPipeline(model, schedular)
with tempfile.TemporaryDirectory() as tmpdirname:
ddpm.save_pretrained(tmpdirname)
new_ddpm = DDPMPipeline.from_pretrained(tmpdirname)
generator = torch.manual_seed(0)
image = ddpm(generator=generator)
generator = generator.manual_seed(0)
new_image = new_ddpm(generator=generator)
assert (image - new_image).abs().sum() < 1e-5, "Models don't give the same forward pass"
@slow
def test_from_pretrained_hub(self):
model_path = "fusing/ddpm-cifar10"
ddpm = DDPMPipeline.from_pretrained(model_path)
ddpm_from_hub = DiffusionPipeline.from_pretrained(model_path)
ddpm.noise_scheduler.num_timesteps = 10
ddpm_from_hub.noise_scheduler.num_timesteps = 10
generator = torch.manual_seed(0)
image = ddpm(generator=generator)
generator = generator.manual_seed(0)
new_image = ddpm_from_hub(generator=generator)
assert (image - new_image).abs().sum() < 1e-5, "Models don't give the same forward pass"
@slow
def test_ddpm_cifar10(self):
generator = torch.manual_seed(0)
model_id = "fusing/ddpm-cifar10"
unet = UNetModel.from_pretrained(model_id)
noise_scheduler = DDPMScheduler.from_config(model_id)
noise_scheduler = noise_scheduler.set_format("pt")
ddpm = DDPMPipeline(unet=unet, noise_scheduler=noise_scheduler)
image = ddpm(generator=generator)
image_slice = image[0, -1, -3:, -3:].cpu()
assert image.shape == (1, 3, 32, 32)
expected_slice = torch.tensor([0.2250, 0.3375, 0.2360, 0.0930, 0.3440, 0.3156, 0.1937, 0.3585, 0.1761])
assert (image_slice.flatten() - expected_slice).abs().max() < 1e-2
@slow
def test_ddim_cifar10(self):
generator = torch.manual_seed(0)
model_id = "fusing/ddpm-cifar10"
unet = UNetModel.from_pretrained(model_id)
noise_scheduler = DDIMScheduler(tensor_format="pt")
ddim = DDIMPipeline(unet=unet, noise_scheduler=noise_scheduler)
image = ddim(generator=generator, eta=0.0)
image_slice = image[0, -1, -3:, -3:].cpu()
assert image.shape == (1, 3, 32, 32)
expected_slice = torch.tensor(
[-0.7383, -0.7385, -0.7298, -0.7364, -0.7414, -0.7239, -0.6737, -0.6813, -0.7068]
)
assert (image_slice.flatten() - expected_slice).abs().max() < 1e-2
@slow
def test_pndm_cifar10(self):
generator = torch.manual_seed(0)
model_id = "fusing/ddpm-cifar10"
unet = UNetModel.from_pretrained(model_id)
noise_scheduler = PNDMScheduler(tensor_format="pt")
pndm = PNDMPipeline(unet=unet, noise_scheduler=noise_scheduler)
image = pndm(generator=generator)
image_slice = image[0, -1, -3:, -3:].cpu()
assert image.shape == (1, 3, 32, 32)
expected_slice = torch.tensor(
[-0.7888, -0.7870, -0.7759, -0.7823, -0.8014, -0.7608, -0.6818, -0.7130, -0.7471]
)
assert (image_slice.flatten() - expected_slice).abs().max() < 1e-2
@slow
def test_ldm_text2img(self):
model_id = "fusing/latent-diffusion-text2im-large"
ldm = LatentDiffusionPipeline.from_pretrained(model_id)
prompt = "A painting of a squirrel eating a burger"
generator = torch.manual_seed(0)
image = ldm([prompt], generator=generator, num_inference_steps=20)
image_slice = image[0, -1, -3:, -3:].cpu()
assert image.shape == (1, 3, 256, 256)
expected_slice = torch.tensor([0.7295, 0.7358, 0.7256, 0.7435, 0.7095, 0.6884, 0.7325, 0.6921, 0.6458])
assert (image_slice.flatten() - expected_slice).abs().max() < 1e-2
@slow
def test_glide_text2img(self):
model_id = "fusing/glide-base"
glide = GlidePipeline.from_pretrained(model_id)
prompt = "a pencil sketch of a corgi"
generator = torch.manual_seed(0)
image = glide(prompt, generator=generator, num_inference_steps_upscale=20)
image_slice = image[0, :3, :3, -1].cpu()
assert image.shape == (1, 256, 256, 3)
expected_slice = torch.tensor([0.7119, 0.7073, 0.6460, 0.7780, 0.7423, 0.6926, 0.7378, 0.7189, 0.7784])
assert (image_slice.flatten() - expected_slice).abs().max() < 1e-2
@slow
def test_grad_tts(self):
model_id = "fusing/grad-tts-libri-tts"
grad_tts = GradTTSPipeline.from_pretrained(model_id)
noise_scheduler = GradTTSScheduler()
grad_tts.noise_scheduler = noise_scheduler
text = "Hello world, I missed you so much."
generator = torch.manual_seed(0)
# generate mel spectograms using text
mel_spec = grad_tts(text, generator=generator)
assert mel_spec.shape == (1, 80, 143)
expected_slice = torch.tensor(
[-6.7584, -6.8347, -6.3293, -6.6437, -6.7233, -6.4684, -6.1187, -6.3172, -6.6890]
)
assert (mel_spec[0, :3, :3].cpu().flatten() - expected_slice).abs().max() < 1e-2
def test_module_from_pipeline(self):
model = DiffWave(num_res_layers=4)
noise_scheduler = DDPMScheduler(timesteps=12)
bddm = BDDMPipeline(model, noise_scheduler)
# check if the library name for the diffwave moduel is set to pipeline module
self.assertTrue(bddm.config["diffwave"][0] == "pipeline_bddm")
# check if we can save and load the pipeline
with tempfile.TemporaryDirectory() as tmpdirname:
bddm.save_pretrained(tmpdirname)
_ = BDDMPipeline.from_pretrained(tmpdirname)
# check if the same works using the DifusionPipeline class
_ = DiffusionPipeline.from_pretrained(tmpdirname)
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