update conversion script for Kandinsky unet (#3766)

* update kandinsky conversion script

* style

---------

Co-authored-by: yiyixuxu <yixu310@gmail,com>

Author: yiyixuxu

scripts/convert_kandinsky_to_diffusers.py

@@ -8,7 +8,6 @@
 from diffusers import UNet2DConditionModel
 from diffusers.models.prior_transformer import PriorTransformer
 from diffusers.models.vq_model import VQModel
-from diffusers.pipelines.kandinsky.text_proj import KandinskyTextProjModel
 
 
 """
@@ -225,37 +224,55 @@ def prior_ff_to_diffusers(checkpoint, *, diffusers_ff_prefix, original_ff_prefix
 
 UNET_CONFIG = {
     "act_fn": "silu",
+    "addition_embed_type": "text_image",
+    "addition_embed_type_num_heads": 64,
     "attention_head_dim": 64,
-    "block_out_channels": (384, 768, 1152, 1536),
+    "block_out_channels": [384, 768, 1152, 1536],
     "center_input_sample": False,
-    "class_embed_type": "identity",
+    "class_embed_type": None,
+    "class_embeddings_concat": False,
+    "conv_in_kernel": 3,
+    "conv_out_kernel": 3,
     "cross_attention_dim": 768,
-    "down_block_types": (
+    "cross_attention_norm": None,
+    "down_block_types": [
         "ResnetDownsampleBlock2D",
         "SimpleCrossAttnDownBlock2D",
         "SimpleCrossAttnDownBlock2D",
         "SimpleCrossAttnDownBlock2D",
-    ),
+    ],
     "downsample_padding": 1,
     "dual_cross_attention": False,
+    "encoder_hid_dim": 1024,
+    "encoder_hid_dim_type": "text_image_proj",
     "flip_sin_to_cos": True,
     "freq_shift": 0,
     "in_channels": 4,
     "layers_per_block": 3,
+    "mid_block_only_cross_attention": None,
     "mid_block_scale_factor": 1,
     "mid_block_type": "UNetMidBlock2DSimpleCrossAttn",
     "norm_eps": 1e-05,
     "norm_num_groups": 32,
+    "num_class_embeds": None,
     "only_cross_attention": False,
     "out_channels": 8,
+    "projection_class_embeddings_input_dim": None,
+    "resnet_out_scale_factor": 1.0,
+    "resnet_skip_time_act": False,
     "resnet_time_scale_shift": "scale_shift",
     "sample_size": 64,
-    "up_block_types": (
+    "time_cond_proj_dim": None,
+    "time_embedding_act_fn": None,
+    "time_embedding_dim": None,
+    "time_embedding_type": "positional",
+    "timestep_post_act": None,
+    "up_block_types": [
         "SimpleCrossAttnUpBlock2D",
         "SimpleCrossAttnUpBlock2D",
         "SimpleCrossAttnUpBlock2D",
         "ResnetUpsampleBlock2D",
-    ),
+    ],
     "upcast_attention": False,
     "use_linear_projection": False,
 }
@@ -274,6 +291,8 @@ def unet_original_checkpoint_to_diffusers_checkpoint(model, checkpoint):
 
     diffusers_checkpoint.update(unet_time_embeddings(checkpoint))
     diffusers_checkpoint.update(unet_conv_in(checkpoint))
+    diffusers_checkpoint.update(unet_add_embedding(checkpoint))
+    diffusers_checkpoint.update(unet_encoder_hid_proj(checkpoint))
 
     # <original>.input_blocks -> <diffusers>.down_blocks
 
@@ -336,37 +355,55 @@ def unet_original_checkpoint_to_diffusers_checkpoint(model, checkpoint):
 
 INPAINT_UNET_CONFIG = {
     "act_fn": "silu",
+    "addition_embed_type": "text_image",
+    "addition_embed_type_num_heads": 64,
     "attention_head_dim": 64,
-    "block_out_channels": (384, 768, 1152, 1536),
+    "block_out_channels": [384, 768, 1152, 1536],
     "center_input_sample": False,
-    "class_embed_type": "identity",
+    "class_embed_type": None,
+    "class_embeddings_concat": None,
+    "conv_in_kernel": 3,
+    "conv_out_kernel": 3,
     "cross_attention_dim": 768,
-    "down_block_types": (
+    "cross_attention_norm": None,
+    "down_block_types": [
         "ResnetDownsampleBlock2D",
         "SimpleCrossAttnDownBlock2D",
         "SimpleCrossAttnDownBlock2D",
         "SimpleCrossAttnDownBlock2D",
-    ),
+    ],
     "downsample_padding": 1,
     "dual_cross_attention": False,
+    "encoder_hid_dim": 1024,
+    "encoder_hid_dim_type": "text_image_proj",
     "flip_sin_to_cos": True,
     "freq_shift": 0,
     "in_channels": 9,
     "layers_per_block": 3,
+    "mid_block_only_cross_attention": None,
     "mid_block_scale_factor": 1,
     "mid_block_type": "UNetMidBlock2DSimpleCrossAttn",
     "norm_eps": 1e-05,
     "norm_num_groups": 32,
+    "num_class_embeds": None,
     "only_cross_attention": False,
     "out_channels": 8,
+    "projection_class_embeddings_input_dim": None,
+    "resnet_out_scale_factor": 1.0,
+    "resnet_skip_time_act": False,
     "resnet_time_scale_shift": "scale_shift",
     "sample_size": 64,
-    "up_block_types": (
+    "time_cond_proj_dim": None,
+    "time_embedding_act_fn": None,
+    "time_embedding_dim": None,
+    "time_embedding_type": "positional",
+    "timestep_post_act": None,
+    "up_block_types": [
         "SimpleCrossAttnUpBlock2D",
         "SimpleCrossAttnUpBlock2D",
         "SimpleCrossAttnUpBlock2D",
         "ResnetUpsampleBlock2D",
-    ),
+    ],
     "upcast_attention": False,
     "use_linear_projection": False,
 }
@@ -381,10 +418,12 @@ def inpaint_unet_model_from_original_config():
 def inpaint_unet_original_checkpoint_to_diffusers_checkpoint(model, checkpoint):
     diffusers_checkpoint = {}
 
-    num_head_channels = UNET_CONFIG["attention_head_dim"]
+    num_head_channels = INPAINT_UNET_CONFIG["attention_head_dim"]
 
     diffusers_checkpoint.update(unet_time_embeddings(checkpoint))
     diffusers_checkpoint.update(unet_conv_in(checkpoint))
+    diffusers_checkpoint.update(unet_add_embedding(checkpoint))
+    diffusers_checkpoint.update(unet_encoder_hid_proj(checkpoint))
 
     # <original>.input_blocks -> <diffusers>.down_blocks
 
@@ -440,38 +479,6 @@ def inpaint_unet_original_checkpoint_to_diffusers_checkpoint(model, checkpoint):
 
 # done inpaint unet
 
-# text proj
-
-TEXT_PROJ_CONFIG = {}
-
-
-def text_proj_from_original_config():
-    model = KandinskyTextProjModel(**TEXT_PROJ_CONFIG)
-    return model
-
-
-# Note that the input checkpoint is the original text2img model checkpoint
-def text_proj_original_checkpoint_to_diffusers_checkpoint(checkpoint):
-    diffusers_checkpoint = {
-        # <original>.text_seq_proj.0 -> <diffusers>.encoder_hidden_states_proj
-        "encoder_hidden_states_proj.weight": checkpoint["to_model_dim_n.weight"],
-        "encoder_hidden_states_proj.bias": checkpoint["to_model_dim_n.bias"],
-        # <original>.clip_tok_proj -> <diffusers>.clip_extra_context_tokens_proj
-        "clip_extra_context_tokens_proj.weight": checkpoint["clip_to_seq.weight"],
-        "clip_extra_context_tokens_proj.bias": checkpoint["clip_to_seq.bias"],
-        # <original>.proj_n -> <diffusers>.embedding_proj
-        "embedding_proj.weight": checkpoint["proj_n.weight"],
-        "embedding_proj.bias": checkpoint["proj_n.bias"],
-        # <original>.ln_model_n -> <diffusers>.embedding_norm
-        "embedding_norm.weight": checkpoint["ln_model_n.weight"],
-        "embedding_norm.bias": checkpoint["ln_model_n.bias"],
-        # <original>.clip_emb -> <diffusers>.clip_image_embeddings_project_to_time_embeddings
-        "clip_image_embeddings_project_to_time_embeddings.weight": checkpoint["img_layer.weight"],
-        "clip_image_embeddings_project_to_time_embeddings.bias": checkpoint["img_layer.bias"],
-    }
-
-    return diffusers_checkpoint
-
 
 # unet utils
 
@@ -506,6 +513,38 @@ def unet_conv_in(checkpoint):
     return diffusers_checkpoint
 
 
+def unet_add_embedding(checkpoint):
+    diffusers_checkpoint = {}
+
+    diffusers_checkpoint.update(
+        {
+            "add_embedding.text_norm.weight": checkpoint["ln_model_n.weight"],
+            "add_embedding.text_norm.bias": checkpoint["ln_model_n.bias"],
+            "add_embedding.text_proj.weight": checkpoint["proj_n.weight"],
+            "add_embedding.text_proj.bias": checkpoint["proj_n.bias"],
+            "add_embedding.image_proj.weight": checkpoint["img_layer.weight"],
+            "add_embedding.image_proj.bias": checkpoint["img_layer.bias"],
+        }
+    )
+
+    return diffusers_checkpoint
+
+
+def unet_encoder_hid_proj(checkpoint):
+    diffusers_checkpoint = {}
+
+    diffusers_checkpoint.update(
+        {
+            "encoder_hid_proj.image_embeds.weight": checkpoint["clip_to_seq.weight"],
+            "encoder_hid_proj.image_embeds.bias": checkpoint["clip_to_seq.bias"],
+            "encoder_hid_proj.text_proj.weight": checkpoint["to_model_dim_n.weight"],
+            "encoder_hid_proj.text_proj.bias": checkpoint["to_model_dim_n.bias"],
+        }
+    )
+
+    return diffusers_checkpoint
+
+
 # <original>.out.0 -> <diffusers>.conv_norm_out
 def unet_conv_norm_out(checkpoint):
     diffusers_checkpoint = {}
@@ -857,25 +896,13 @@ def text2img(*, args, checkpoint_map_location):
 
     unet_diffusers_checkpoint = unet_original_checkpoint_to_diffusers_checkpoint(unet_model, text2img_checkpoint)
 
-    # text proj interlude
-
-    # The original decoder implementation includes a set of parameters that are used
-    # for creating the `encoder_hidden_states` which are what the U-net is conditioned
-    # on. The diffusers conditional unet directly takes the encoder_hidden_states. We pull
-    # the parameters into the KandinskyTextProjModel class
-    text_proj_model = text_proj_from_original_config()
-
-    text_proj_checkpoint = text_proj_original_checkpoint_to_diffusers_checkpoint(text2img_checkpoint)
-
-    load_checkpoint_to_model(text_proj_checkpoint, text_proj_model, strict=True)
-
     del text2img_checkpoint
 
     load_checkpoint_to_model(unet_diffusers_checkpoint, unet_model, strict=True)
 
     print("done loading text2img")
 
-    return unet_model, text_proj_model
+    return unet_model
 
 
 def inpaint_text2img(*, args, checkpoint_map_location):
@@ -891,25 +918,13 @@ def inpaint_text2img(*, args, checkpoint_map_location):
         inpaint_unet_model, inpaint_text2img_checkpoint
     )
 
-    # text proj interlude
-
-    # The original decoder implementation includes a set of parameters that are used
-    # for creating the `encoder_hidden_states` which are what the U-net is conditioned
-    # on. The diffusers conditional unet directly takes the encoder_hidden_states. We pull
-    # the parameters into the KandinskyTextProjModel class
-    text_proj_model = text_proj_from_original_config()
-
-    text_proj_checkpoint = text_proj_original_checkpoint_to_diffusers_checkpoint(inpaint_text2img_checkpoint)
-
-    load_checkpoint_to_model(text_proj_checkpoint, text_proj_model, strict=True)
-
     del inpaint_text2img_checkpoint
 
     load_checkpoint_to_model(inpaint_unet_diffusers_checkpoint, inpaint_unet_model, strict=True)
 
     print("done loading inpaint text2img")
 
-    return inpaint_unet_model, text_proj_model
+    return inpaint_unet_model
 
 
 # movq
@@ -1384,15 +1399,11 @@ def load_checkpoint_to_model(checkpoint, model, strict=False):
         prior_model = prior(args=args, checkpoint_map_location=checkpoint_map_location)
         prior_model.save_pretrained(args.dump_path)
     elif args.debug == "text2img":
-        unet_model, text_proj_model = text2img(args=args, checkpoint_map_location=checkpoint_map_location)
+        unet_model = text2img(args=args, checkpoint_map_location=checkpoint_map_location)
         unet_model.save_pretrained(f"{args.dump_path}/unet")
-        text_proj_model.save_pretrained(f"{args.dump_path}/text_proj")
     elif args.debug == "inpaint_text2img":
-        inpaint_unet_model, inpaint_text_proj_model = inpaint_text2img(
-            args=args, checkpoint_map_location=checkpoint_map_location
-        )
+        inpaint_unet_model = inpaint_text2img(args=args, checkpoint_map_location=checkpoint_map_location)
         inpaint_unet_model.save_pretrained(f"{args.dump_path}/inpaint_unet")
-        inpaint_text_proj_model.save_pretrained(f"{args.dump_path}/inpaint_text_proj")
     elif args.debug == "decoder":
         decoder = movq(args=args, checkpoint_map_location=checkpoint_map_location)
         decoder.save_pretrained(f"{args.dump_path}/decoder")