feat(api): convert CNet for existing diffusion models
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@ -34,138 +34,17 @@ from ..utils import ConversionContext, is_torch_2_0, onnx_export
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logger = getLogger(__name__)
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@torch.no_grad()
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def convert_diffusion_diffusers(
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def convert_diffusion_diffusers_cnet(
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conversion: ConversionContext,
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model: Dict,
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source: str,
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) -> Tuple[bool, str]:
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"""
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From https://github.com/huggingface/diffusers/blob/main/scripts/convert_stable_diffusion_checkpoint_to_onnx.py
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"""
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name = model.get("name")
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source = source or model.get("source")
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single_vae = model.get("single_vae")
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replace_vae = model.get("vae")
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device = conversion.training_device
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dtype = conversion.torch_dtype()
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logger.debug("using Torch dtype %s for pipeline", dtype)
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dest_path = path.join(conversion.model_path, name)
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model_index = path.join(dest_path, "model_index.json")
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# diffusers go into a directory rather than .onnx file
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logger.info(
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"converting Stable Diffusion model %s: %s -> %s/", name, source, dest_path
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)
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if single_vae:
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logger.info("converting model with single VAE")
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if path.exists(dest_path) and path.exists(model_index):
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# TODO: check if CNet has been converted
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logger.info("ONNX model already exists, skipping")
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return (False, dest_path)
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pipeline = StableDiffusionPipeline.from_pretrained(
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source,
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torch_dtype=dtype,
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use_auth_token=conversion.token,
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).to(device)
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output_path = Path(dest_path)
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optimize_pipeline(conversion, pipeline)
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# TEXT ENCODER
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num_tokens = pipeline.text_encoder.config.max_position_embeddings
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text_hidden_size = pipeline.text_encoder.config.hidden_size
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text_input = pipeline.tokenizer(
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"A sample prompt",
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padding="max_length",
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max_length=pipeline.tokenizer.model_max_length,
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truncation=True,
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return_tensors="pt",
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)
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onnx_export(
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pipeline.text_encoder,
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# casting to torch.int32 until the CLIP fix is released: https://github.com/huggingface/transformers/pull/18515/files
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model_args=(
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text_input.input_ids.to(device=device, dtype=torch.int32),
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None, # attention mask
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None, # position ids
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None, # output attentions
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torch.tensor(True).to(device=device, dtype=torch.bool),
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),
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output_path=output_path / "text_encoder" / ONNX_MODEL,
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ordered_input_names=["input_ids"],
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output_names=["last_hidden_state", "pooler_output", "hidden_states"],
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dynamic_axes={
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"input_ids": {0: "batch", 1: "sequence"},
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},
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opset=conversion.opset,
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half=conversion.half,
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)
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del pipeline.text_encoder
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logger.debug("UNET config: %s", pipeline.unet.config)
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# UNET
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if single_vae:
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unet_inputs = ["sample", "timestep", "encoder_hidden_states", "class_labels"]
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unet_scale = torch.tensor(4).to(device=device, dtype=torch.long)
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else:
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unet_inputs = ["sample", "timestep", "encoder_hidden_states", "return_dict"]
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unet_scale = torch.tensor(False).to(device=device, dtype=torch.bool)
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if is_torch_2_0:
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pipeline.unet.set_attn_processor(CrossAttnProcessor())
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unet_in_channels = pipeline.unet.config.in_channels
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unet_sample_size = pipeline.unet.config.sample_size
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unet_path = output_path / "unet" / ONNX_MODEL
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onnx_export(
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pipeline.unet,
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model_args=(
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torch.randn(2, unet_in_channels, unet_sample_size, unet_sample_size).to(
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device=device, dtype=dtype
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),
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torch.randn(2).to(device=device, dtype=dtype),
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torch.randn(2, num_tokens, text_hidden_size).to(device=device, dtype=dtype),
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unet_scale,
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),
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output_path=unet_path,
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ordered_input_names=unet_inputs,
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# has to be different from "sample" for correct tracing
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output_names=["out_sample"],
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dynamic_axes={
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"sample": {0: "batch", 1: "channels", 2: "height", 3: "width"},
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"timestep": {0: "batch"},
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"encoder_hidden_states": {0: "batch", 1: "sequence"},
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},
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opset=conversion.opset,
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half=conversion.half,
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external_data=True,
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)
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unet_model_path = str(unet_path.absolute().as_posix())
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unet_dir = path.dirname(unet_model_path)
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unet = load_model(unet_model_path)
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# clean up existing tensor files
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rmtree(unet_dir)
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mkdir(unet_dir)
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# collate external tensor files into one
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save_model(
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unet,
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unet_model_path,
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save_as_external_data=True,
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all_tensors_to_one_file=True,
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location=ONNX_WEIGHTS,
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convert_attribute=False,
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)
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del pipeline.unet
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device: str,
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output_path: Path,
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dtype,
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unet_in_channels,
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unet_sample_size,
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num_tokens,
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text_hidden_size,
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):
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# CNet
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pipe_cnet = UNet2DConditionModel_CNet.from_pretrained(source, subfolder="unet").to(
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device=device, dtype=dtype
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@ -288,6 +167,147 @@ def convert_diffusion_diffusers(
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)
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del pipe_cnet
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@torch.no_grad()
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def convert_diffusion_diffusers(
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conversion: ConversionContext,
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model: Dict,
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source: str,
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) -> Tuple[bool, str]:
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"""
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From https://github.com/huggingface/diffusers/blob/main/scripts/convert_stable_diffusion_checkpoint_to_onnx.py
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"""
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name = model.get("name")
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source = source or model.get("source")
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single_vae = model.get("single_vae")
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replace_vae = model.get("vae")
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device = conversion.training_device
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dtype = conversion.torch_dtype()
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logger.debug("using Torch dtype %s for pipeline", dtype)
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dest_path = path.join(conversion.model_path, name)
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model_index = path.join(dest_path, "model_index.json")
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model_cnet = path.join(dest_path, "cnet", ONNX_MODEL)
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# diffusers go into a directory rather than .onnx file
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logger.info(
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"converting Stable Diffusion model %s: %s -> %s/", name, source, dest_path
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)
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if single_vae:
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logger.info("converting model with single VAE")
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if path.exists(dest_path) and path.exists(model_index):
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if not path.exists(model_cnet):
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logger.info("ONNX model was converted without a ControlNet UNet, converting one")
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convert_diffusion_diffusers_cnet(conversion, source, device, output_path, dtype, unet_in_channels, unet_sample_size, num_tokens, text_hidden_size)
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return (True, dest_path)
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else:
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logger.info("ONNX model already exists, skipping")
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return (False, dest_path)
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pipeline = StableDiffusionPipeline.from_pretrained(
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source,
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torch_dtype=dtype,
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use_auth_token=conversion.token,
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).to(device)
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output_path = Path(dest_path)
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optimize_pipeline(conversion, pipeline)
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# TEXT ENCODER
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num_tokens = pipeline.text_encoder.config.max_position_embeddings
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text_hidden_size = pipeline.text_encoder.config.hidden_size
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text_input = pipeline.tokenizer(
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"A sample prompt",
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padding="max_length",
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max_length=pipeline.tokenizer.model_max_length,
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truncation=True,
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return_tensors="pt",
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)
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onnx_export(
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pipeline.text_encoder,
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# casting to torch.int32 until the CLIP fix is released: https://github.com/huggingface/transformers/pull/18515/files
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model_args=(
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text_input.input_ids.to(device=device, dtype=torch.int32),
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None, # attention mask
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None, # position ids
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None, # output attentions
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torch.tensor(True).to(device=device, dtype=torch.bool),
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),
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output_path=output_path / "text_encoder" / ONNX_MODEL,
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ordered_input_names=["input_ids"],
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output_names=["last_hidden_state", "pooler_output", "hidden_states"],
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dynamic_axes={
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"input_ids": {0: "batch", 1: "sequence"},
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},
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opset=conversion.opset,
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half=conversion.half,
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)
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del pipeline.text_encoder
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logger.debug("UNET config: %s", pipeline.unet.config)
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# UNET
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if single_vae:
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unet_inputs = ["sample", "timestep", "encoder_hidden_states", "class_labels"]
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unet_scale = torch.tensor(4).to(device=device, dtype=torch.long)
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else:
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unet_inputs = ["sample", "timestep", "encoder_hidden_states", "return_dict"]
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unet_scale = torch.tensor(False).to(device=device, dtype=torch.bool)
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if is_torch_2_0:
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pipeline.unet.set_attn_processor(CrossAttnProcessor())
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unet_in_channels = pipeline.unet.config.in_channels
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unet_sample_size = pipeline.unet.config.sample_size
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unet_path = output_path / "unet" / ONNX_MODEL
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onnx_export(
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pipeline.unet,
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model_args=(
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torch.randn(2, unet_in_channels, unet_sample_size, unet_sample_size).to(
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device=device, dtype=dtype
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),
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torch.randn(2).to(device=device, dtype=dtype),
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torch.randn(2, num_tokens, text_hidden_size).to(device=device, dtype=dtype),
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unet_scale,
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),
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output_path=unet_path,
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ordered_input_names=unet_inputs,
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# has to be different from "sample" for correct tracing
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output_names=["out_sample"],
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dynamic_axes={
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"sample": {0: "batch", 1: "channels", 2: "height", 3: "width"},
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"timestep": {0: "batch"},
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"encoder_hidden_states": {0: "batch", 1: "sequence"},
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},
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opset=conversion.opset,
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half=conversion.half,
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external_data=True,
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)
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unet_model_path = str(unet_path.absolute().as_posix())
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unet_dir = path.dirname(unet_model_path)
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unet = load_model(unet_model_path)
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# clean up existing tensor files
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rmtree(unet_dir)
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mkdir(unet_dir)
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# collate external tensor files into one
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save_model(
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unet,
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unet_model_path,
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save_as_external_data=True,
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all_tensors_to_one_file=True,
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location=ONNX_WEIGHTS,
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convert_attribute=False,
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)
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del pipeline.unet
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convert_diffusion_diffusers_cnet(conversion, source, device, output_path, dtype, unet_in_channels, unet_sample_size, num_tokens, text_hidden_size)
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# VAE
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if replace_vae is not None:
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logger.debug("loading custom VAE: %s", replace_vae)
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@ -64,7 +64,7 @@ export function QueryList<T>(props: QueryListProps<T>) {
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function noneLabel(): Maybe<string> {
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if (showNone) {
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return t(`${labelKey}.none`);
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return 'none';
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}
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return undefined;
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