Convert glide weights

models/vision/glide/convert_weights.py

@@ -0,0 +1,60 @@
+import argparse
+
+import torch
+from torch import nn
+
+from transformers import CLIPTextConfig, CLIPTextModel, GPT2Tokenizer
+
+# wget https://openaipublic.blob.core.windows.net/diffusion/dec-2021/base.pt
+state_dict = torch.load("base.pt", map_location="cpu")
+state_dict = {k: nn.Parameter(v) for k, v in state_dict.items()}
+config = CLIPTextConfig(
+    hidden_size=512,
+    intermediate_size=2048,
+    num_hidden_layers=16,
+    num_attention_heads=8,
+    max_position_embeddings=128
+)
+model = CLIPTextModel(config).eval()
+tokenizer = GPT2Tokenizer("./glide-base/vocab.json", "./glide-base/merges.txt", pad_token="<|endoftext|>")
+tokenizer.save_pretrained("./glide-base")
+
+hf_encoder = model.text_model
+
+hf_encoder.embeddings.token_embedding.weight = state_dict["token_embedding.weight"]
+hf_encoder.embeddings.position_embedding.weight.data = state_dict["positional_embedding"]
+hf_encoder.embeddings.padding_embedding.weight.data = state_dict["padding_embedding"]
+
+hf_encoder.final_layer_norm.weight = state_dict["final_ln.weight"]
+hf_encoder.final_layer_norm.bias = state_dict["final_ln.bias"]
+
+for layer_idx in range(config.num_hidden_layers):
+    hf_layer = hf_encoder.encoder.layers[layer_idx]
+    q_proj, k_proj, v_proj = state_dict[f"transformer.resblocks.{layer_idx}.attn.c_qkv.weight"].chunk(3, dim=0)
+    q_proj_bias, k_proj_bias, v_proj_bias = state_dict[f"transformer.resblocks.{layer_idx}.attn.c_qkv.bias"].chunk(3, dim=0)
+
+    hf_layer.self_attn.q_proj.weight.data = q_proj
+    hf_layer.self_attn.q_proj.bias.data = q_proj_bias
+    hf_layer.self_attn.k_proj.weight.data = k_proj
+    hf_layer.self_attn.k_proj.bias.data = k_proj_bias
+    hf_layer.self_attn.v_proj.weight.data = v_proj
+    hf_layer.self_attn.v_proj.bias.data = v_proj_bias
+
+    hf_layer.self_attn.out_proj.weight = state_dict[f"transformer.resblocks.{layer_idx}.attn.c_proj.weight"]
+    hf_layer.self_attn.out_proj.bias = state_dict[f"transformer.resblocks.{layer_idx}.attn.c_proj.bias"]
+
+    hf_layer.layer_norm1.weight = state_dict[f"transformer.resblocks.{layer_idx}.ln_1.weight"]
+    hf_layer.layer_norm1.bias = state_dict[f"transformer.resblocks.{layer_idx}.ln_1.bias"]
+    hf_layer.layer_norm2.weight = state_dict[f"transformer.resblocks.{layer_idx}.ln_2.weight"]
+    hf_layer.layer_norm2.bias = state_dict[f"transformer.resblocks.{layer_idx}.ln_2.bias"]
+
+    hf_layer.mlp.fc1.weight = state_dict[f"transformer.resblocks.{layer_idx}.mlp.c_fc.weight"]
+    hf_layer.mlp.fc1.bias = state_dict[f"transformer.resblocks.{layer_idx}.mlp.c_fc.bias"]
+    hf_layer.mlp.fc2.weight = state_dict[f"transformer.resblocks.{layer_idx}.mlp.c_proj.weight"]
+    hf_layer.mlp.fc2.bias = state_dict[f"transformer.resblocks.{layer_idx}.mlp.c_proj.bias"]
+
+inputs = tokenizer(["an oil painting of a corgi", ""], padding="max_length", max_length=128, return_tensors="pt")
+with torch.no_grad():
+    outputs = model(**inputs)
+
+model.save_pretrained("./glide-base")

models/vision/glide/modeling_vqvae.py.py

@@ -1 +0,0 @@
-#!/usr/bin/env python3

models/vision/glide/run_glide.py

@@ -6,6 +6,7 @@ generator = torch.Generator()
 generator = generator.manual_seed(0)
 
 # 1. Load models
+
 scheduler = GaussianDDPMScheduler.from_config("fusing/glide-base")
 model = UNetGLIDEModel.from_pretrained("fusing/glide-base")
 

src/diffusers/models/unet_glide.py

@@ -5,9 +5,8 @@ import torch
 import torch.nn as nn
 import torch.nn.functional as F
 
-from ..configuration_utils import Config
+from ..configuration_utils import ConfigMixin
-from ..modeling_utils import PreTrainedModel
+from ..modeling_utils import ModelMixin
-
 
 def convert_module_to_f16(l):
     """
@@ -388,7 +387,7 @@ class QKVAttention(nn.Module):
         return a.reshape(bs, -1, length)
 
 
-class UNetGLIDEModel(PreTrainedModel, Config):
+class UNetGLIDEModel(ModelMixin, ConfigMixin):
     """
     The full UNet model with attention and timestep embedding.