allows one to shortcut sampling at a specific unet number, if one were to be training in stages

README.md

@@ -783,7 +783,7 @@ for unet_number in (1, 2):
 # you can sample from the exponentially moving averaged unets as so
 
 mock_image_embed = torch.randn(4, 512).cuda()
-images = decoder_trainer.sample(mock_image_embed, text = text) # (4, 3, 256, 256)
+images = decoder.sample(mock_image_embed, text = text) # (4, 3, 256, 256)
 ```
 
 ## CLI (wip)
@@ -818,25 +818,14 @@ Once built, images will be saved to the same directory the command is invoked
 - [x] bring in vit-vqgan https://arxiv.org/abs/2110.04627 for the latent diffusion
 - [x] abstract interface for CLIP adapter class, so other CLIPs can be brought in
 - [x] take care of mixed precision as well as gradient accumulation within decoder trainer
-- [x] just take care of the training for the decoder in a wrapper class, as each unet in the cascade will need its own optimizer
-- [x] bring in tools to train vqgan-vae
-- [x] add convnext backbone for vqgan-vae (in addition to vit [vit-vqgan] + resnet)
-- [x] make sure DDPMs can be run with traditional resnet blocks (but leave convnext as an option for experimentation)
-- [x] make sure for the latter unets in the cascade, one can train on crops for learning super resolution (constrain the unet to be only convolutions in that case, or allow conv-like attention with rel pos bias)
-- [ ] become an expert with unets, cleanup unet code, make it fully configurable, port all learnings over to https://github.com/lucidrains/x-unet (test out unet² in ddpm repo)
+- [ ] become an expert with unets, cleanup unet code, make it fully configurable, port all learnings over to https://github.com/lucidrains/x-unet
 - [ ] copy the cascading ddpm code to a separate repo (perhaps https://github.com/lucidrains/denoising-diffusion-pytorch) as the main contribution of dalle2 really is just the prior network
 - [ ] transcribe code to Jax, which lowers the activation energy for distributed training, given access to TPUs
-- [ ] pull logic for training diffusion prior into a class DiffusionPriorTrainer, for eventual script based + CLI based training
+- [ ] just take care of the training for the decoder in a wrapper class, as each unet in the cascade will need its own optimizer
 - [ ] train on a toy task, offer in colab
 - [ ] think about how best to design a declarative training config that handles preencoding for prior and training of multiple networks in decoder
 - [ ] extend diffusion head to use diffusion-gan (potentially using lightweight-gan) to speed up inference
-- [ ] bring in cross-scale embedding from iclr paper https://github.com/lucidrains/vit-pytorch/blob/main/vit_pytorch/crossformer.py#L14
-- [ ] figure out if possible to augment with external memory, as described in https://arxiv.org/abs/2204.11824
-- [ ] test out grid attention in cascading ddpm locally, decide whether to keep or remove
-- [ ] use an experimental tracker agnostic setup, as done <a href="https://github.com/lucidrains/tf-bind-transformer#simple-trainer-class-for-fine-tuning">here</a>
-- [ ] interface out the vqgan-vae so a pretrained one can be pulled off the shelf to validate latent diffusion + DALL-E2
-- [ ] make sure FILIP works with DALL-E2 from x-clip https://arxiv.org/abs/2111.07783
-- [ ] make sure resnet | convnext block hyperparameters can be configurable across unet depth (groups and expansion factor)
+- [ ] bring in tools to train vqgan-vae
 
 ## Citations
 
@@ -868,22 +857,12 @@ Once built, images will be saved to the same directory the command is invoked
 
 ```bibtex
 @inproceedings{Liu2022ACF,
-    title   = {A ConvNet for the 2020s},
+    title   = {A ConvNet for the 2020https://arxiv.org/abs/2112.11435s},
     author  = {Zhuang Liu and Hanzi Mao and Chaozheng Wu and Christoph Feichtenhofer and Trevor Darrell and Saining Xie},
     year    = {2022}
 }
 ```
 
-```bibtex
-@article{shen2019efficient,
-    author  = {Zhuoran Shen and Mingyuan Zhang and Haiyu Zhao and Shuai Yi and Hongsheng Li},
-    title   = {Efficient Attention: Attention with Linear Complexities},
-    journal = {CoRR},
-    year    = {2018},
-    url     = {http://arxiv.org/abs/1812.01243},
-}
-```
-
 ```bibtex
 @inproceedings{Tu2022MaxViTMV,
     title   = {MaxViT: Multi-Axis Vision Transformer},
@@ -902,14 +881,4 @@ Once built, images will be saved to the same directory the command is invoked
 }
 ```
 
-```bibtex
-@article{Shleifer2021NormFormerIT,
-    title   = {NormFormer: Improved Transformer Pretraining with Extra Normalization},
-    author  = {Sam Shleifer and Jason Weston and Myle Ott},
-    journal = {ArXiv},
-    year    = {2021},
-    volume  = {abs/2110.09456}
-}
-```
-
-*Creating noise from data is easy; creating data from noise is generative modeling.* - <a href="https://arxiv.org/abs/2011.13456">Yang Song's paper</a>
+*Creating noise from data is easy; creating data from noise is generative modeling.* - Yang Song's <a href="https://arxiv.org/abs/2011.13456">paper</a>

dalle2_pytorch/cli.py

@@ -1,7 +1,6 @@
 import click
 import torch
 import torchvision.transforms as T
-from functools import reduce
 from pathlib import Path
 
 from dalle2_pytorch import DALLE2, Decoder, DiffusionPrior

dalle2_pytorch/dalle2_pytorch.py

@@ -16,7 +16,6 @@ from einops_exts import rearrange_many, repeat_many, check_shape
 from einops_exts.torch import EinopsToAndFrom
 
 from kornia.filters import gaussian_blur2d
-import kornia.augmentation as K
 
 from dalle2_pytorch.tokenizer import tokenizer
 from dalle2_pytorch.vqgan_vae import NullVQGanVAE, VQGanVAE
@@ -30,9 +29,6 @@ from x_clip import CLIP
 def exists(val):
     return val is not None
 
-def identity(t, *args, **kwargs):
-    return t
-
 def default(val, d):
     if exists(val):
         return val
@@ -500,12 +496,7 @@ class SwiGLU(nn.Module):
         x, gate = x.chunk(2, dim = -1)
         return x * F.silu(gate)
 
-def FeedForward(
-    dim,
-    mult = 4,
-    dropout = 0.,
-    post_activation_norm = False
-):
+def FeedForward(dim, mult = 4, dropout = 0., post_activation_norm = False):
     """ post-activation norm https://arxiv.org/abs/2110.09456 """
 
     inner_dim = int(mult * dim)
@@ -528,8 +519,7 @@ class Attention(nn.Module):
         dim_head = 64,
         heads = 8,
         dropout = 0.,
-        causal = False,
-        post_norm = False
+        causal = False
     ):
         super().__init__()
         self.scale = dim_head ** -0.5
@@ -544,11 +534,7 @@ class Attention(nn.Module):
         self.null_kv = nn.Parameter(torch.randn(2, dim_head))
         self.to_q = nn.Linear(dim, inner_dim, bias = False)
         self.to_kv = nn.Linear(dim, dim_head * 2, bias = False)
-
-        self.to_out = nn.Sequential(
-            nn.Linear(inner_dim, dim, bias = False),
-            LayerNorm(dim) if post_norm else nn.Identity()
-        )
+        self.to_out = nn.Linear(inner_dim, dim, bias = False)
 
     def forward(self, x, mask = None, attn_bias = None):
         b, n, device = *x.shape[:2], x.device
@@ -610,11 +596,10 @@ class CausalTransformer(nn.Module):
         dim_head = 64,
         heads = 8,
         ff_mult = 4,
-        norm_out = True,
+        norm_out = False,
         attn_dropout = 0.,
         ff_dropout = 0.,
-        final_proj = True,
-        normformer = False
+        final_proj = True
     ):
         super().__init__()
         self.rel_pos_bias = RelPosBias(heads = heads)
@@ -622,8 +607,8 @@ class CausalTransformer(nn.Module):
         self.layers = nn.ModuleList([])
         for _ in range(depth):
             self.layers.append(nn.ModuleList([
-                Attention(dim = dim, causal = True, dim_head = dim_head, heads = heads, dropout = attn_dropout, post_norm = normformer),
-                FeedForward(dim = dim, mult = ff_mult, dropout = ff_dropout, post_activation_norm = normformer)
+                Attention(dim = dim, causal = True, dim_head = dim_head, heads = heads, dropout = attn_dropout),
+                FeedForward(dim = dim, mult = ff_mult, dropout = ff_dropout)
             ]))
 
         self.norm = LayerNorm(dim) if norm_out else nn.Identity()  # unclear in paper whether they projected after the classic layer norm for the final denoised image embedding, or just had the transformer output it directly: plan on offering both options
@@ -650,14 +635,12 @@ class DiffusionPriorNetwork(nn.Module):
         self,
         dim,
         num_timesteps = None,
-        l2norm_output = False,  # whether to restrict image embedding output with l2norm at the end (may make it easier to learn?)
         **kwargs
     ):
         super().__init__()
         self.time_embeddings = nn.Embedding(num_timesteps, dim) if exists(num_timesteps) else nn.Sequential(Rearrange('b -> b 1'), MLP(1, dim)) # also offer a continuous version of timestep embeddings, with a 2 layer MLP
         self.learned_query = nn.Parameter(torch.randn(dim))
         self.causal_transformer = CausalTransformer(dim = dim, **kwargs)
-        self.l2norm_output = l2norm_output
 
     def forward_with_cond_scale(
         self,
@@ -736,8 +719,7 @@ class DiffusionPriorNetwork(nn.Module):
 
         pred_image_embed = tokens[..., -1, :]
 
-        output_fn = l2norm if self.l2norm_output else identity
-        return output_fn(pred_image_embed)
+        return pred_image_embed
 
 class DiffusionPrior(BaseGaussianDiffusion):
     def __init__(
@@ -931,72 +913,6 @@ class SinusoidalPosEmb(nn.Module):
         emb = rearrange(x, 'i -> i 1') * rearrange(emb, 'j -> 1 j')
         return torch.cat((emb.sin(), emb.cos()), dim = -1)
 
-class Block(nn.Module):
-    def __init__(
-        self,
-        dim,
-        dim_out,
-        groups = 8
-    ):
-        super().__init__()
-        self.block = nn.Sequential(
-            nn.Conv2d(dim, dim_out, 3, padding = 1),
-            nn.GroupNorm(groups, dim_out),
-            nn.SiLU()
-        )
-    def forward(self, x):
-        return self.block(x)
-
-class ResnetBlock(nn.Module):
-    def __init__(
-        self,
-        dim,
-        dim_out,
-        *,
-        cond_dim = None,
-        time_cond_dim = None,
-        groups = 8
-    ):
-        super().__init__()
-
-        self.time_mlp = None
-
-        if exists(time_cond_dim):
-            self.time_mlp = nn.Sequential(
-                nn.SiLU(),
-                nn.Linear(time_cond_dim, dim_out)
-            )
-
-        self.cross_attn = None
-
-        if exists(cond_dim):
-            self.cross_attn = EinopsToAndFrom(
-                'b c h w',
-                'b (h w) c',
-                CrossAttention(
-                    dim = dim_out,
-                    context_dim = cond_dim
-                )
-            )
-
-        self.block1 = Block(dim, dim_out, groups = groups)
-        self.block2 = Block(dim_out, dim_out, groups = groups)
-        self.res_conv = nn.Conv2d(dim, dim_out, 1) if dim != dim_out else nn.Identity()
-
-    def forward(self, x, cond = None, time_emb = None):
-        h = self.block1(x)
-
-        if exists(self.time_mlp) and exists(time_emb):
-            time_emb = self.time_mlp(time_emb)
-            h = rearrange(time_emb, 'b c -> b c 1 1') + h
-
-        if exists(self.cross_attn):
-            assert exists(cond)
-            h = self.cross_attn(h, context = cond) + h
-
-        h = self.block2(h)
-        return h + self.res_conv(x)
-
 class ConvNextBlock(nn.Module):
     """ https://arxiv.org/abs/2201.03545 """
 
@@ -1006,8 +922,8 @@ class ConvNextBlock(nn.Module):
         dim_out,
         *,
         cond_dim = None,
-        time_cond_dim = None,
-        mult = 2
+        mult = 2,
+        norm = True
     ):
         super().__init__()
         need_projection = dim != dim_out
@@ -1024,19 +940,11 @@ class ConvNextBlock(nn.Module):
                 )
             )
 
-        self.time_mlp = None
-
-        if exists(time_cond_dim):
-            self.time_mlp = nn.Sequential(
-                nn.GELU(),
-                nn.Linear(time_cond_dim, dim)
-            )
-
         self.ds_conv = nn.Conv2d(dim, dim, 7, padding = 3, groups = dim)
 
         inner_dim = int(dim_out * mult)
         self.net = nn.Sequential(
-            ChanLayerNorm(dim),
+            ChanLayerNorm(dim) if norm else nn.Identity(),
             nn.Conv2d(dim, inner_dim, 3, padding = 1),
             nn.GELU(),
             nn.Conv2d(inner_dim, dim_out, 3, padding = 1)
@@ -1044,13 +952,9 @@ class ConvNextBlock(nn.Module):
 
         self.res_conv = nn.Conv2d(dim, dim_out, 1) if need_projection else nn.Identity()
 
-    def forward(self, x, cond = None, time = None):
+    def forward(self, x, cond = None):
         h = self.ds_conv(x)
 
-        if exists(time) and exists(self.time_mlp):
-            t = self.time_mlp(time)
-            h = rearrange(t, 'b c -> b c 1 1') + h
-
         if exists(self.cross_attn):
             assert exists(cond)
             h = self.cross_attn(h, context = cond) + h
@@ -1133,46 +1037,6 @@ class GridAttention(nn.Module):
         out = rearrange(out, '(b h w) (w1 w2) c -> b c (w1 h) (w2 w)', w1 = wsz, w2 = wsz, h = h // wsz, w = w // wsz)
         return out
 
-class LinearAttention(nn.Module):
-    def __init__(
-        self,
-        dim,
-        dim_head = 32,
-        heads = 8
-    ):
-        super().__init__()
-        self.scale = dim_head ** -0.5
-        self.heads = heads
-        inner_dim = dim_head * heads
-        self.norm = ChanLayerNorm(dim)
-
-        self.nonlin = nn.GELU()
-        self.to_qkv = nn.Conv2d(dim, inner_dim * 3, 1, bias = False)
-
-        self.to_out = nn.Sequential(
-            nn.Conv2d(inner_dim, dim, 1, bias = False),
-            ChanLayerNorm(dim)
-        )
-
-    def forward(self, fmap):
-        h, x, y = self.heads, *fmap.shape[-2:]
-
-        fmap = self.norm(fmap)
-        q, k, v = self.to_qkv(fmap).chunk(3, dim = 1)
-        q, k, v = rearrange_many((q, k, v), 'b (h c) x y -> (b h) (x y) c', h = h)
-
-        q = q.softmax(dim = -1)
-        k = k.softmax(dim = -2)
-
-        q = q * self.scale
-
-        context = einsum('b n d, b n e -> b d e', k, v)
-        out = einsum('b n d, b d e -> b n e', q, context)
-        out = rearrange(out, '(b h) (x y) d -> b (h d) x y', h = h, x = x, y = y)
-
-        out = self.nonlin(out)
-        return self.to_out(out)
-
 class Unet(nn.Module):
     def __init__(
         self,
@@ -1187,19 +1051,14 @@ class Unet(nn.Module):
         dim_mults=(1, 2, 4, 8),
         channels = 3,
         attn_dim_head = 32,
-        attn_heads = 16,
+        attn_heads = 8,
         lowres_cond = False, # for cascading diffusion - https://cascaded-diffusion.github.io/
         sparse_attn = False,
+        sparse_attn_window = 8,  # window size for sparse attention
         attend_at_middle = True, # whether to have a layer of attention at the bottleneck (can turn off for higher resolution in cascading DDPM, before bringing in efficient attention)
         cond_on_text_encodings = False,
         max_text_len = 256,
         cond_on_image_embeds = False,
-        init_dim = None,
-        init_conv_kernel_size = 7,
-        block_type = 'resnet',
-        block_resnet_groups = 8,
-        block_convnext_mult = 2,
-        **kwargs
     ):
         super().__init__()
         # save locals to take care of some hyperparameters for cascading DDPM
@@ -1217,34 +1076,22 @@ class Unet(nn.Module):
         self.channels = channels
 
         init_channels = channels if not lowres_cond else channels * 2 # in cascading diffusion, one concats the low resolution image, blurred, for conditioning the higher resolution synthesis
-        init_dim = default(init_dim, dim // 2)
 
-        assert (init_conv_kernel_size % 2) == 1
-        self.init_conv = nn.Conv2d(init_channels, init_dim, init_conv_kernel_size, padding = init_conv_kernel_size // 2)
-
-        dims = [init_dim, *map(lambda m: dim * m, dim_mults)]
+        dims = [init_channels, *map(lambda m: dim * m, dim_mults)]
         in_out = list(zip(dims[:-1], dims[1:]))
 
         # time, image embeddings, and optional text encoding
 
         cond_dim = default(cond_dim, dim)
-        time_cond_dim = dim * 4
 
-        self.to_time_hiddens = nn.Sequential(
+        self.time_mlp = nn.Sequential(
             SinusoidalPosEmb(dim),
-            nn.Linear(dim, time_cond_dim),
-            nn.GELU()
-        )
-
-        self.to_time_tokens = nn.Sequential(
-            nn.Linear(time_cond_dim, cond_dim * num_time_tokens),
+            nn.Linear(dim, dim * 4),
+            nn.GELU(),
+            nn.Linear(dim * 4, cond_dim * num_time_tokens),
             Rearrange('b (r d) -> b r d', r = num_time_tokens)
         )
 
-        self.to_time_cond = nn.Sequential(
-            nn.Linear(time_cond_dim, time_cond_dim)
-        )
-
         self.image_to_cond = nn.Sequential(
             nn.Linear(image_embed_dim, cond_dim * num_image_tokens),
             Rearrange('b (n d) -> b n d', n = num_image_tokens)
@@ -1274,15 +1121,6 @@ class Unet(nn.Module):
 
         attn_kwargs = dict(heads = attn_heads, dim_head = attn_dim_head)
 
-        # whether to use resnet or the (improved?) convnext blocks
-
-        if block_type == 'resnet':
-            block_klass = partial(ResnetBlock, groups = block_resnet_groups)
-        elif block_type == 'convnext':
-            block_klass = partial(ConvNextBlock, mult = block_convnext_mult)
-        else:
-            raise ValueError(f'unimplemented block type {block_type}')
-
         # layers
 
         self.downs = nn.ModuleList([])
@@ -1295,32 +1133,32 @@ class Unet(nn.Module):
             layer_cond_dim = cond_dim if not is_first else None
 
             self.downs.append(nn.ModuleList([
-                block_klass(dim_in, dim_out, time_cond_dim = time_cond_dim),
-                Residual(LinearAttention(dim_out, **attn_kwargs)) if sparse_attn else nn.Identity(),
-                block_klass(dim_out, dim_out, cond_dim = layer_cond_dim, time_cond_dim = time_cond_dim),
+                ConvNextBlock(dim_in, dim_out, norm = ind != 0),
+                Residual(GridAttention(dim_out, window_size = sparse_attn_window, **attn_kwargs)) if sparse_attn else nn.Identity(),
+                ConvNextBlock(dim_out, dim_out, cond_dim = layer_cond_dim),
                 Downsample(dim_out) if not is_last else nn.Identity()
             ]))
 
         mid_dim = dims[-1]
 
-        self.mid_block1 = block_klass(mid_dim, mid_dim, cond_dim = cond_dim, time_cond_dim = time_cond_dim)
+        self.mid_block1 = ConvNextBlock(mid_dim, mid_dim, cond_dim = cond_dim)
         self.mid_attn = EinopsToAndFrom('b c h w', 'b (h w) c', Residual(Attention(mid_dim, **attn_kwargs))) if attend_at_middle else None
-        self.mid_block2 = block_klass(mid_dim, mid_dim, cond_dim = cond_dim, time_cond_dim = time_cond_dim)
+        self.mid_block2 = ConvNextBlock(mid_dim, mid_dim, cond_dim = cond_dim)
 
         for ind, (dim_in, dim_out) in enumerate(reversed(in_out[1:])):
             is_last = ind >= (num_resolutions - 2)
             layer_cond_dim = cond_dim if not is_last else None
 
             self.ups.append(nn.ModuleList([
-                block_klass(dim_out * 2, dim_in, cond_dim = layer_cond_dim, time_cond_dim = time_cond_dim),
-                Residual(LinearAttention(dim_in, **attn_kwargs)) if sparse_attn else nn.Identity(),
-                block_klass(dim_in, dim_in, cond_dim = layer_cond_dim, time_cond_dim = time_cond_dim),
+                ConvNextBlock(dim_out * 2, dim_in, cond_dim = layer_cond_dim),
+                Residual(GridAttention(dim_in, window_size = sparse_attn_window, **attn_kwargs)) if sparse_attn else nn.Identity(),
+                ConvNextBlock(dim_in, dim_in, cond_dim = layer_cond_dim),
                 Upsample(dim_in)
             ]))
 
         out_dim = default(out_dim, channels)
         self.final_conv = nn.Sequential(
-            block_klass(dim, dim),
+            ConvNextBlock(dim, dim),
             nn.Conv2d(dim, out_dim, 1)
         )
 
@@ -1376,16 +1214,9 @@ class Unet(nn.Module):
         if exists(lowres_cond_img):
             x = torch.cat((x, lowres_cond_img), dim = 1)
 
-        # initial convolution
-
-        x = self.init_conv(x)
-
         # time conditioning
 
-        time_hiddens = self.to_time_hiddens(time)
-
-        time_tokens = self.to_time_tokens(time_hiddens)
-        t = self.to_time_cond(time_hiddens)
+        time_tokens = self.time_mlp(time)
 
         # conditional dropout
 
@@ -1451,25 +1282,25 @@ class Unet(nn.Module):
 
         hiddens = []
 
-        for block1, sparse_attn, block2, downsample in self.downs:
-            x = block1(x, c, t)
+        for convnext, sparse_attn, convnext2, downsample in self.downs:
+            x = convnext(x, c)
             x = sparse_attn(x)
-            x = block2(x, c, t)
+            x = convnext2(x, c)
             hiddens.append(x)
             x = downsample(x)
 
-        x = self.mid_block1(x, mid_c, t)
+        x = self.mid_block1(x, mid_c)
 
         if exists(self.mid_attn):
             x = self.mid_attn(x)
 
-        x = self.mid_block2(x, mid_c, t)
+        x = self.mid_block2(x, mid_c)
 
-        for block1, sparse_attn, block2, upsample in self.ups:
+        for convnext, sparse_attn, convnext2, upsample in self.ups:
             x = torch.cat((x, hiddens.pop()), dim=1)
-            x = block1(x, c, t)
+            x = convnext(x, c)
             x = sparse_attn(x)
-            x = block2(x, c, t)
+            x = convnext2(x, c)
             x = upsample(x)
 
         return self.final_conv(x)
@@ -1527,7 +1358,6 @@ class Decoder(BaseGaussianDiffusion):
         predict_x_start = False,
         predict_x_start_for_latent_diffusion = False,
         image_sizes = None,                         # for cascading ddpm, image size at each stage
-        random_crop_sizes = None,                   # whether to random crop the image at that stage in the cascade (super resoluting convolutions at the end may be able to generalize on smaller crops)
         lowres_cond_upsample_mode = 'bilinear',     # cascading ddpm - low resolution upsample mode
         lowres_downsample_first = True,             # cascading ddpm - resizes to lower resolution, then to next conditional resolution + blur
         blur_sigma = 0.1,                           # cascading ddpm - blur sigma
@@ -1590,10 +1420,6 @@ class Decoder(BaseGaussianDiffusion):
         self.image_sizes = image_sizes
         self.sample_channels = cast_tuple(self.channels, len(image_sizes))
 
-        # random crop sizes (for super-resoluting unets at the end of cascade?)
-
-        self.random_crop_sizes = cast_tuple(random_crop_sizes, len(image_sizes))
-
         # predict x0 config
 
         self.predict_x_start = cast_tuple(predict_x_start, len(unets)) if not predict_x_start_for_latent_diffusion else tuple(map(lambda t: isinstance(t, VQGanVAE), self.vaes))
@@ -1783,10 +1609,10 @@ class Decoder(BaseGaussianDiffusion):
 
         unet = self.get_unet(unet_number)
 
-        vae                 = self.vaes[unet_index]
-        target_image_size   = self.image_sizes[unet_index]
-        predict_x_start     = self.predict_x_start[unet_index]
-        random_crop_size    = self.random_crop_sizes[unet_index]
+        target_image_size = self.image_sizes[unet_index]
+        vae = self.vaes[unet_index]
+        predict_x_start = self.predict_x_start[unet_index]
+
         b, c, h, w, device, = *image.shape, image.device
 
         check_shape(image, 'b c h w', c = self.channels)
@@ -1807,14 +1633,6 @@ class Decoder(BaseGaussianDiffusion):
         lowres_cond_img = self.to_lowres_cond(image, target_image_size = target_image_size, downsample_image_size = self.image_sizes[unet_index - 1]) if unet_number > 1 else None
         image = resize_image_to(image, target_image_size)
 
-        if exists(random_crop_size):
-            aug = K.RandomCrop((random_crop_size, random_crop_size))
-
-            # make sure low res conditioner and image both get augmented the same way
-            # detailed https://kornia.readthedocs.io/en/latest/augmentation.module.html?highlight=randomcrop#kornia.augmentation.RandomCrop
-            image = aug(image)
-            lowres_cond_img = aug(lowres_cond_img, params = aug._params)
-
         vae.eval()
         with torch.no_grad():
             image = vae.encode(image)

dalle2_pytorch/train.py

@@ -159,13 +159,12 @@ class DecoderTrainer(nn.Module):
         index = unet_number - 1
         unet = self.decoder.unets[index]
 
+        if exists(self.max_grad_norm):
+            nn.utils.clip_grad_norm_(unet.parameters(), self.max_grad_norm)
+
         optimizer = getattr(self, f'optim{index}')
         scaler = getattr(self, f'scaler{index}')
 
-        if exists(self.max_grad_norm):
-            scaler.unscale_(optimizer)
-            nn.utils.clip_grad_norm_(unet.parameters(), self.max_grad_norm)
-
         scaler.step(optimizer)
         scaler.update()
         optimizer.zero_grad()

dalle2_pytorch/train_vqgan_vae.py

@@ -1,266 +0,0 @@
-from math import sqrt
-import copy
-from random import choice
-from pathlib import Path
-from shutil import rmtree
-
-import torch
-from torch import nn
-
-from PIL import Image
-from torchvision.datasets import ImageFolder
-import torchvision.transforms as T
-from torch.utils.data import Dataset, DataLoader, random_split
-from torchvision.utils import make_grid, save_image
-
-from einops import rearrange
-
-from dalle2_pytorch.train import EMA
-from dalle2_pytorch.vqgan_vae import VQGanVAE
-from dalle2_pytorch.optimizer import get_optimizer
-
-# helpers
-
-def exists(val):
-    return val is not None
-
-def noop(*args, **kwargs):
-    pass
-
-def cycle(dl):
-    while True:
-        for data in dl:
-            yield data
-
-def cast_tuple(t):
-    return t if isinstance(t, (tuple, list)) else (t,)
-
-def yes_or_no(question):
-    answer = input(f'{question} (y/n) ')
-    return answer.lower() in ('yes', 'y')
-
-def accum_log(log, new_logs):
-    for key, new_value in new_logs.items():
-        old_value = log.get(key, 0.)
-        log[key] = old_value + new_value
-    return log
-
-# classes
-
-class ImageDataset(Dataset):
-    def __init__(
-        self,
-        folder,
-        image_size,
-        exts = ['jpg', 'jpeg', 'png']
-    ):
-        super().__init__()
-        self.folder = folder
-        self.image_size = image_size
-        self.paths = [p for ext in exts for p in Path(f'{folder}').glob(f'**/*.{ext}')]
-
-        print(f'{len(self.paths)} training samples found at {folder}')
-
-        self.transform = T.Compose([
-            T.Lambda(lambda img: img.convert('RGB') if img.mode != 'RGB' else img),
-            T.Resize(image_size),
-            T.RandomHorizontalFlip(),
-            T.CenterCrop(image_size),
-            T.ToTensor()
-        ])
-
-    def __len__(self):
-        return len(self.paths)
-
-    def __getitem__(self, index):
-        path = self.paths[index]
-        img = Image.open(path)
-        return self.transform(img)
-
-# main trainer class
-
-class VQGanVAETrainer(nn.Module):
-    def __init__(
-        self,
-        vae,
-        *,
-        num_train_steps,
-        lr,
-        batch_size,
-        folder,
-        grad_accum_every,
-        wd = 0.,
-        save_results_every = 100,
-        save_model_every = 1000,
-        results_folder = './results',
-        valid_frac = 0.05,
-        random_split_seed = 42,
-        ema_beta = 0.995,
-        ema_update_after_step = 2000,
-        ema_update_every = 10,
-        apply_grad_penalty_every = 4,
-    ):
-        super().__init__()
-        assert isinstance(vae, VQGanVAE), 'vae must be instance of VQGanVAE'
-        image_size = vae.image_size
-
-        self.vae = vae
-        self.ema_vae = EMA(vae, update_after_step = ema_update_after_step, update_every = ema_update_every)
-
-        self.register_buffer('steps', torch.Tensor([0]))
-
-        self.num_train_steps = num_train_steps
-        self.batch_size = batch_size
-        self.grad_accum_every = grad_accum_every
-
-        all_parameters = set(vae.parameters())
-        discr_parameters = set(vae.discr.parameters())
-        vae_parameters = all_parameters - discr_parameters
-
-        self.optim = get_optimizer(vae_parameters, lr = lr, wd = wd)
-        self.discr_optim = get_optimizer(discr_parameters, lr = lr, wd = wd)
-
-        # create dataset
-
-        self.ds = ImageDataset(folder, image_size = image_size)
-
-        # split for validation
-
-        if valid_frac > 0:
-            train_size = int((1 - valid_frac) * len(self.ds))
-            valid_size = len(self.ds) - train_size
-            self.ds, self.valid_ds = random_split(self.ds, [train_size, valid_size], generator = torch.Generator().manual_seed(random_split_seed))
-            print(f'training with dataset of {len(self.ds)} samples and validating with randomly splitted {len(self.valid_ds)} samples')
-        else:
-            self.valid_ds = self.ds
-            print(f'training with shared training and valid dataset of {len(self.ds)} samples')
-
-        # dataloader
-
-        self.dl = cycle(DataLoader(
-            self.ds,
-            batch_size = batch_size,
-            shuffle = True
-        ))
-
-        self.valid_dl = cycle(DataLoader(
-            self.valid_ds,
-            batch_size = batch_size,
-            shuffle = True
-        ))
-
-        self.save_model_every = save_model_every
-        self.save_results_every = save_results_every
-
-        self.apply_grad_penalty_every = apply_grad_penalty_every
-
-        self.results_folder = Path(results_folder)
-
-        if len([*self.results_folder.glob('**/*')]) > 0 and yes_or_no('do you want to clear previous experiment checkpoints and results?'):
-            rmtree(str(self.results_folder))
-
-        self.results_folder.mkdir(parents = True, exist_ok = True)
-
-    def train_step(self):
-        device = next(self.vae.parameters()).device
-        steps = int(self.steps.item())
-        apply_grad_penalty = not (steps % self.apply_grad_penalty_every)
-
-        self.vae.train()
-
-        # logs
-
-        logs = {}
-
-        # update vae (generator)
-
-        for _ in range(self.grad_accum_every):
-            img = next(self.dl)
-            img = img.to(device)
-
-            loss = self.vae(
-                img,
-                return_loss = True,
-                apply_grad_penalty = apply_grad_penalty
-            )
-
-            accum_log(logs, {'loss': loss.item() / self.grad_accum_every})
-
-            (loss / self.grad_accum_every).backward()
-
-        self.optim.step()
-        self.optim.zero_grad()
-
-
-        # update discriminator
-
-        if exists(self.vae.discr):
-            discr_loss = 0
-            for _ in range(self.grad_accum_every):
-                img = next(self.dl)
-                img = img.to(device)
-
-                loss = self.vae(img, return_discr_loss = True)
-                accum_log(logs, {'discr_loss': loss.item() / self.grad_accum_every})
-
-                (loss / self.grad_accum_every).backward()
-
-            self.discr_optim.step()
-            self.discr_optim.zero_grad()
-
-            # log
-
-            print(f"{steps}: vae loss: {logs['loss']} - discr loss: {logs['discr_loss']}")
-
-        # update exponential moving averaged generator
-
-        self.ema_vae.update()
-
-        # sample results every so often
-
-        if not (steps % self.save_results_every):
-            for model, filename in ((self.ema_vae.ema_model, f'{steps}.ema'), (self.vae, str(steps))):
-                model.eval()
-
-                imgs = next(self.dl)
-                imgs = imgs.to(device)
-
-                recons = model(imgs)
-                nrows = int(sqrt(self.batch_size))
-
-                imgs_and_recons = torch.stack((imgs, recons), dim = 0)
-                imgs_and_recons = rearrange(imgs_and_recons, 'r b ... -> (b r) ...')
-
-                imgs_and_recons = imgs_and_recons.detach().cpu().float().clamp(0., 1.)
-                grid = make_grid(imgs_and_recons, nrow = 2, normalize = True, value_range = (0, 1))
-
-                logs['reconstructions'] = grid
-
-                save_image(grid, str(self.results_folder / f'{filename}.png'))
-
-            print(f'{steps}: saving to {str(self.results_folder)}')
-
-        # save model every so often
-
-        if not (steps % self.save_model_every):
-            state_dict = self.vae.state_dict()
-            model_path = str(self.results_folder / f'vae.{steps}.pt')
-            torch.save(state_dict, model_path)
-
-            ema_state_dict = self.ema_vae.state_dict()
-            model_path = str(self.results_folder / f'vae.{steps}.ema.pt')
-            torch.save(ema_state_dict, model_path)
-
-            print(f'{steps}: saving model to {str(self.results_folder)}')
-
-        self.steps += 1
-        return logs
-
-    def train(self, log_fn = noop):
-        device = next(self.vae.parameters()).device
-
-        while self.steps < self.num_train_steps:
-            logs = self.train_step()
-            log_fn(logs)
-
-        print('training complete')

dalle2_pytorch/vqgan_vae.py

@@ -285,10 +285,6 @@ class ResnetEncDec(nn.Module):
     def get_encoded_fmap_size(self, image_size):
         return image_size // (2 ** self.layers)
 
-    @property
-    def last_dec_layer(self):
-        return self.decoders[-1].weight
-
     def encode(self, x):
         for enc in self.encoders:
             x = enc(x)
@@ -331,112 +327,6 @@ class ResBlock(nn.Module):
     def forward(self, x):
         return self.net(x) + x
 
-# convnext enc dec
-
-class ChanLayerNorm(nn.Module):
-    def __init__(self, dim, eps = 1e-5):
-        super().__init__()
-        self.eps = eps
-        self.g = nn.Parameter(torch.ones(1, dim, 1, 1))
-
-    def forward(self, x):
-        var = torch.var(x, dim = 1, unbiased = False, keepdim = True)
-        mean = torch.mean(x, dim = 1, keepdim = True)
-        return (x - mean) / (var + self.eps).sqrt() * self.g
-
-class ConvNext(nn.Module):
-    def __init__(self, dim, mult = 4, kernel_size = 3, ds_kernel_size = 7):
-        super().__init__()
-        inner_dim = int(dim * mult)
-        self.net = nn.Sequential(
-            nn.Conv2d(dim, dim, ds_kernel_size, padding = ds_kernel_size // 2, groups = dim),
-            ChanLayerNorm(dim),
-            nn.Conv2d(dim, inner_dim, kernel_size, padding = kernel_size // 2),
-            nn.GELU(),
-            nn.Conv2d(inner_dim, dim, kernel_size, padding = kernel_size // 2)
-        )
-
-    def forward(self, x):
-        return self.net(x) + x
-
-class ConvNextEncDec(nn.Module):
-    def __init__(
-        self,
-        dim,
-        *,
-        channels = 3,
-        layers = 4,
-        layer_mults = None,
-        num_blocks = 1,
-        first_conv_kernel_size = 5,
-        use_attn = True,
-        attn_dim_head = 64,
-        attn_heads = 8,
-        attn_dropout = 0.,
-    ):
-        super().__init__()
-
-        self.layers = layers
-
-        self.encoders = MList([])
-        self.decoders = MList([])
-
-        layer_mults = default(layer_mults, list(map(lambda t: 2 ** t, range(layers))))
-        assert len(layer_mults) == layers, 'layer multipliers must be equal to designated number of layers'
-
-        layer_dims = [dim * mult for mult in layer_mults]
-        dims = (dim, *layer_dims)
-
-        self.encoded_dim = dims[-1]
-
-        dim_pairs = zip(dims[:-1], dims[1:])
-
-        append = lambda arr, t: arr.append(t)
-        prepend = lambda arr, t: arr.insert(0, t)
-
-        if not isinstance(num_blocks, tuple):
-            num_blocks = (*((0,) * (layers - 1)), num_blocks)
-
-        if not isinstance(use_attn, tuple):
-            use_attn = (*((False,) * (layers - 1)), use_attn)
-
-        assert len(num_blocks) == layers, 'number of blocks config must be equal to number of layers'
-        assert len(use_attn) == layers
-
-        for layer_index, (dim_in, dim_out), layer_num_blocks, layer_use_attn in zip(range(layers), dim_pairs, num_blocks, use_attn):
-            append(self.encoders, nn.Sequential(nn.Conv2d(dim_in, dim_out, 4, stride = 2, padding = 1), leaky_relu()))
-            prepend(self.decoders, nn.Sequential(nn.ConvTranspose2d(dim_out, dim_in, 4, 2, 1), leaky_relu()))
-
-            if layer_use_attn:
-                prepend(self.decoders, VQGanAttention(dim = dim_out, heads = attn_heads, dim_head = attn_dim_head, dropout = attn_dropout))
-
-            for _ in range(layer_num_blocks):
-                append(self.encoders, ConvNext(dim_out))
-                prepend(self.decoders, ConvNext(dim_out))
-
-            if layer_use_attn:
-                append(self.encoders, VQGanAttention(dim = dim_out, heads = attn_heads, dim_head = attn_dim_head, dropout = attn_dropout))
-
-        prepend(self.encoders, nn.Conv2d(channels, dim, first_conv_kernel_size, padding = first_conv_kernel_size // 2))
-        append(self.decoders, nn.Conv2d(dim, channels, 1))
-
-    def get_encoded_fmap_size(self, image_size):
-        return image_size // (2 ** self.layers)
-
-    @property
-    def last_dec_layer(self):
-        return self.decoders[-1].weight
-
-    def encode(self, x):
-        for enc in self.encoders:
-            x = enc(x)
-        return x
-
-    def decode(self, x):
-        for dec in self.decoders:
-            x = dec(x)
-        return x
-
 # vqgan attention layer
 
 class VQGanAttention(nn.Module):
@@ -614,10 +504,6 @@ class ViTEncDec(nn.Module):
     def get_encoded_fmap_size(self, image_size):
         return image_size // self.patch_size
 
-    @property
-    def last_dec_layer(self):
-        return self.decoder[-3][-1].weight
-
     def encode(self, x):
         return self.encoder(x)
 
@@ -682,8 +568,6 @@ class VQGanVAE(nn.Module):
             enc_dec_klass = ResnetEncDec
         elif vae_type == 'vit':
             enc_dec_klass = ViTEncDec
-        elif vae_type == 'convnext':
-            enc_dec_klass = ConvNextEncDec
         else:
             raise ValueError(f'{vae_type} not valid')
 
@@ -855,7 +739,7 @@ class VQGanVAE(nn.Module):
 
         # calculate adaptive weight
 
-        last_dec_layer = self.enc_dec.last_dec_layer
+        last_dec_layer = self.decoders[-1].weight
 
         norm_grad_wrt_gen_loss = grad_layer_wrt_loss(gen_loss, last_dec_layer).norm(p = 2)
         norm_grad_wrt_perceptual_loss = grad_layer_wrt_loss(perceptual_loss, last_dec_layer).norm(p = 2)

setup.py

@@ -10,7 +10,7 @@ setup(
       'dream = dalle2_pytorch.cli:dream'
     ],
   },
-  version = '0.0.97',
+  version = '0.0.82',
   license='MIT',
   description = 'DALL-E 2',
   author = 'Phil Wang',
@@ -26,14 +26,12 @@ setup(
     'clip-anytorch',
     'einops>=0.4',
     'einops-exts>=0.0.3',
-    'embedding-reader',
     'kornia>=0.5.4',
     'pillow',
     'torch>=1.10',
     'torchvision',
     'tqdm',
     'vector-quantize-pytorch',
-    'webdataset',
     'x-clip>=0.5.1',
     'youtokentome'
   ],

train_diffusion_prior.py

@@ -1,291 +0,0 @@
-import os
-import math
-import argparse
-import numpy as np
-
-import torch
-from torch import nn
-from embedding_reader import EmbeddingReader
-from dalle2_pytorch import DiffusionPrior, DiffusionPriorNetwork
-from dalle2_pytorch.optimizer import get_optimizer
-from torch.cuda.amp import autocast,GradScaler
-
-import time
-from tqdm import tqdm
-
-import wandb
-os.environ["WANDB_SILENT"] = "true"
-NUM_TEST_EMBEDDINGS = 100 # for cosine similarity reporting during training
-REPORT_METRICS_EVERY = 100 # for cosine similarity and other metric reporting during training
-
-
-def eval_model(model,device,image_reader,text_reader,start,end,batch_size,loss_type,phase="Validation"):
-    model.eval()
-    with torch.no_grad():
-        total_loss = 0.
-        total_samples = 0.
-
-        for emb_images, emb_text in zip(image_reader(batch_size=batch_size, start=start, end=end),
-                text_reader(batch_size=batch_size, start=start, end=end)):
-
-            emb_images_tensor = torch.tensor(emb_images[0]).to(device)
-            emb_text_tensor = torch.tensor(emb_text[0]).to(device)
-
-            batches = emb_images_tensor.shape[0]
-
-            loss = model(text_embed = emb_text_tensor, image_embed = emb_images_tensor)
-
-            total_loss += loss.item() * batches
-            total_samples += batches
-
-        avg_loss = (total_loss / total_samples)
-        wandb.log({f'{phase} {loss_type}': avg_loss})
-
-def save_model(save_path, state_dict):
-    # Saving State Dict
-    print("====================================== Saving checkpoint ======================================")
-    torch.save(state_dict, save_path+'/'+str(time.time())+'_saved_model.pth')
-
-def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,val_set_size,NUM_TEST_EMBEDDINGS,device):
-    cos = nn.CosineSimilarity(dim=1, eps=1e-6)
-
-    tstart = train_set_size+val_set_size
-    tend = train_set_size+val_set_size+NUM_TEST_EMBEDDINGS
-
-    for embt, embi in zip(text_reader(batch_size = NUM_TEST_EMBEDDINGS, start=tstart, end = tend),image_reader(batch_size = NUM_TEST_EMBEDDINGS, start=tstart, end = tend)):
-        text_embed = torch.tensor(embt[0]).to(device)
-        text_embed = text_embed /  text_embed.norm(dim=1, keepdim=True)
-        test_text_cond = dict(text_embed = text_embed)
-
-        test_image_embeddings = torch.tensor(embi[0]).to(device)
-        test_image_embeddings = test_image_embeddings /  test_image_embeddings.norm(dim=1, keepdim=True)
-
-        predicted_image_embeddings = diffusion_prior.p_sample_loop((NUM_TEST_EMBEDDINGS, 768), text_cond = test_text_cond)
-        predicted_image_embeddings = predicted_image_embeddings / predicted_image_embeddings.norm(dim=1, keepdim=True)
-
-        original_similarity = cos(text_embed,test_image_embeddings).cpu().numpy()
-        predicted_similarity = cos(text_embed,predicted_image_embeddings).cpu().numpy()
-
-        wandb.log({"CosineSimilarity(text_embed,image_embed)": np.mean(original_similarity)})
-        wandb.log({"CosineSimilarity(text_embed,predicted_image_embed)":np.mean(predicted_similarity)})
-
-    return np.mean(predicted_similarity - original_similarity)
-
-
-
-def train(image_embed_dim,
-          image_embed_url,
-          text_embed_url,
-          batch_size,
-          train_percent,
-          val_percent,
-          test_percent,
-          num_epochs,
-          dp_loss_type,
-          clip,
-          dp_condition_on_text_encodings,
-          dp_timesteps,
-          dp_l2norm_output,
-          dp_normformer,
-          dp_cond_drop_prob,
-          dpn_depth,
-          dpn_dim_head,
-          dpn_heads,
-          save_interval,
-          save_path,
-          device,
-          learning_rate=0.001,
-          max_grad_norm=0.5,
-          weight_decay=0.01,
-          amp=False):
-
-    # DiffusionPriorNetwork 
-    prior_network = DiffusionPriorNetwork( 
-            dim = image_embed_dim, 
-            depth = dpn_depth, 
-            dim_head = dpn_dim_head, 
-            heads = dpn_heads,
-            normformer = dp_normformer,
-            l2norm_output = dp_l2norm_output).to(device)
-    
-    # DiffusionPrior with text embeddings and image embeddings pre-computed
-    diffusion_prior = DiffusionPrior( 
-            net = prior_network, 
-            clip = clip, 
-            image_embed_dim = image_embed_dim, 
-            timesteps = dp_timesteps,
-            cond_drop_prob = dp_cond_drop_prob, 
-            loss_type = dp_loss_type, 
-            condition_on_text_encodings = dp_condition_on_text_encodings).to(device)
-
-    # Get image and text embeddings from the servers
-    print("==============Downloading embeddings - image and text====================")
-    image_reader = EmbeddingReader(embeddings_folder=image_embed_url, file_format="npy")
-    text_reader  = EmbeddingReader(embeddings_folder=text_embed_url, file_format="npy")
-    num_data_points = text_reader.count
-
-    # Create save_path if it doesn't exist
-    if not os.path.exists(save_path):
-        os.makedirs(save_path)
-
-    ### Training code ###
-    scaler = GradScaler(enabled=amp)
-    optimizer = get_optimizer(diffusion_prior.net.parameters(), wd=weight_decay, lr=learning_rate)
-    epochs = num_epochs
-
-    step = 0
-    t = time.time()
-
-    train_set_size = int(train_percent*num_data_points)
-    val_set_size = int(val_percent*num_data_points)
-
-    for _ in range(epochs):
-        diffusion_prior.train()
-
-        for emb_images,emb_text in zip(image_reader(batch_size=batch_size, start=0, end=train_set_size),
-                text_reader(batch_size=batch_size, start=0, end=train_set_size)):
-            emb_images_tensor = torch.tensor(emb_images[0]).to(device)
-            emb_text_tensor = torch.tensor(emb_text[0]).to(device)
-
-            with autocast(enabled=amp):
-                loss = diffusion_prior(text_embed = emb_text_tensor,image_embed = emb_images_tensor)
-                scaler.scale(loss).backward()
-
-            # Samples per second
-            step+=1
-            samples_per_sec = batch_size*step/(time.time()-t)
-            # Save checkpoint every save_interval minutes
-            if(int(time.time()-t) >= 60*save_interval):
-                t = time.time()
-
-                save_model(
-                    save_path,
-                    dict(model=diffusion_prior.state_dict(), optimizer=optimizer.state_dict(), scaler=scaler.state_dict()))
-
-            # Log to wandb
-            wandb.log({"Training loss": loss.item(),
-                        "Steps": step,
-                        "Samples per second": samples_per_sec})
-            # Log cosineSim(text_embed,predicted_image_embed) - cosineSim(text_embed,image_embed)
-            # Use NUM_TEST_EMBEDDINGS samples from the test set each time
-            # Get embeddings from the most recently saved model
-            if(step % REPORT_METRICS_EVERY) == 0:
-                diff_cosine_sim = report_cosine_sims(diffusion_prior,
-                        image_reader,
-                        text_reader,
-                        train_set_size,
-                        val_set_size,
-                        NUM_TEST_EMBEDDINGS,
-                        device)
-                wandb.log({"Cosine similarity difference": diff_cosine_sim})
-
-            scaler.unscale_(optimizer)
-            nn.utils.clip_grad_norm_(diffusion_prior.parameters(), max_grad_norm)
-
-            scaler.step(optimizer)
-            scaler.update()
-            optimizer.zero_grad()
-
-        ### Evaluate model(validation run) ###
-        start = train_set_size
-        end=start+val_set_size
-        eval_model(diffusion_prior,device,image_reader,text_reader,start,end,batch_size,dp_loss_type,phase="Validation")
-
-    ### Test run ###
-    test_set_size = int(test_percent*train_set_size) 
-    start=train_set_size+val_set_size
-    end=num_data_points
-    eval_model(diffusion_prior,device,image_reader,text_reader,start,end,batch_size,dp_loss_type,phase="Test")
-
-def main():
-    parser = argparse.ArgumentParser()
-    # Logging
-    parser.add_argument("--wandb-entity", type=str, default="laion")
-    parser.add_argument("--wandb-project", type=str, default="diffusion-prior")
-    parser.add_argument("--wandb-name", type=str, default="laion-dprior")
-    parser.add_argument("--wandb-dataset", type=str, default="LAION-5B")
-    parser.add_argument("--wandb-arch", type=str, default="DiffusionPrior")
-    # URLs for embeddings 
-    parser.add_argument("--image-embed-url", type=str, default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/img_emb/")
-    parser.add_argument("--text-embed-url", type=str, default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/text_emb/")
-    # Hyperparameters
-    parser.add_argument("--learning-rate", type=float, default=1.1e-4)
-    parser.add_argument("--weight-decay", type=float, default=6.02e-2)
-    parser.add_argument("--max-grad-norm", type=float, default=0.5)
-    parser.add_argument("--batch-size", type=int, default=10**4)
-    parser.add_argument("--num-epochs", type=int, default=5)
-    # Image embed dimension
-    parser.add_argument("--image-embed-dim", type=int, default=768)
-    # Train-test split
-    parser.add_argument("--train-percent", type=float, default=0.7)
-    parser.add_argument("--val-percent", type=float, default=0.2)
-    parser.add_argument("--test-percent", type=float, default=0.1)
-    # LAION training(pre-computed embeddings)
-    # DiffusionPriorNetwork(dpn) parameters
-    parser.add_argument("--dpn-depth", type=int, default=6)
-    parser.add_argument("--dpn-dim-head", type=int, default=64)
-    parser.add_argument("--dpn-heads", type=int, default=8)
-    # DiffusionPrior(dp) parameters
-    parser.add_argument("--dp-condition-on-text-encodings", type=bool, default=False)
-    parser.add_argument("--dp-timesteps", type=int, default=100)
-    parser.add_argument("--dp-l2norm-output", type=bool, default=False)
-    parser.add_argument("--dp-normformer", type=bool, default=False)
-    parser.add_argument("--dp-cond-drop-prob", type=float, default=0.1)
-    parser.add_argument("--dp-loss-type", type=str, default="l2")
-    parser.add_argument("--clip", type=str, default=None)
-    parser.add_argument("--amp", type=bool, default=False)
-    # Model checkpointing interval(minutes)
-    parser.add_argument("--save-interval", type=int, default=30)
-    parser.add_argument("--save-path", type=str, default="./diffusion_prior_checkpoints")
-
-    args = parser.parse_args()
-
-    print("Setting up wandb logging... Please wait...")
-
-    wandb.init(
-      entity=args.wandb_entity,
-      project=args.wandb_project,
-      config={
-      "learning_rate": args.learning_rate,
-      "architecture": args.wandb_arch,
-      "dataset": args.wandb_dataset,
-      "epochs": args.num_epochs,
-      })
-
-    print("wandb logging setup done!")
-    # Obtain the utilized device.
-
-    has_cuda = torch.cuda.is_available()
-    if has_cuda:
-        device = torch.device("cuda:0")
-        torch.cuda.set_device(device)
-
-    # Training loop
-    train(args.image_embed_dim,
-          args.image_embed_url,
-          args.text_embed_url,
-          args.batch_size,
-          args.train_percent,
-          args.val_percent,
-          args.test_percent,
-          args.num_epochs,
-          args.dp_loss_type,
-          args.clip,
-          args.dp_condition_on_text_encodings,
-          args.dp_timesteps,
-          args.dp_l2norm_output,
-          args.dp_normformer,
-          args.dp_cond_drop_prob,
-          args.dpn_depth,
-          args.dpn_dim_head,
-          args.dpn_heads,
-          args.save_interval,
-          args.save_path,
-          device,
-          args.learning_rate,
-          args.max_grad_norm,
-          args.weight_decay,
-          args.amp)
-
-if __name__ == "__main__":
-  main()