Fix: CUDAExecutionProvider was not being used to infer Style-Bert-VITS2 ONNX models even though CUDA was available

app.py

@@ -14,6 +14,7 @@ from style_bert_vits2.constants import GRADIO_THEME, VERSION
 from style_bert_vits2.nlp.japanese import pyopenjtalk_worker
 from style_bert_vits2.nlp.japanese.user_dict import update_dict
 from style_bert_vits2.tts_model import TTSModelHolder
+from style_bert_vits2.utils import torch_device_to_onnx_providers
 
 
 # このプロセスからはワーカーを起動して辞書を使いたいので、ここで初期化
@@ -40,7 +41,9 @@ if device == "cuda" and not torch.cuda.is_available():
 #     download_default_models()
 
 path_config = get_path_config()
-model_holder = TTSModelHolder(Path(path_config.assets_root), device)
+model_holder = TTSModelHolder(
+    Path(path_config.assets_root), device, torch_device_to_onnx_providers(device)
+)
 
 with gr.Blocks(theme=GRADIO_THEME) as app:
     gr.Markdown(f"# Style-Bert-VITS2 WebUI (version {VERSION})")

gradio_tabs/inference.py

@@ -18,11 +18,12 @@ from style_bert_vits2.constants import (
     Languages,
 )
 from style_bert_vits2.logging import logger
-from style_bert_vits2.models.infer import InvalidToneError
+from style_bert_vits2.nlp import InvalidToneError
 from style_bert_vits2.nlp.japanese import pyopenjtalk_worker as pyopenjtalk
 from style_bert_vits2.nlp.japanese.g2p_utils import g2kata_tone, kata_tone2phone_tone
 from style_bert_vits2.nlp.japanese.normalizer import normalize_text
 from style_bert_vits2.tts_model import TTSModelHolder
+from style_bert_vits2.utils import torch_device_to_onnx_providers
 
 
 # pyopenjtalk_worker を起動
@@ -533,6 +534,8 @@ if __name__ == "__main__":
     path_config = get_path_config()
     assets_root = path_config.assets_root
     device = "cuda" if torch.cuda.is_available() else "cpu"
-    model_holder = TTSModelHolder(assets_root, device)
+    model_holder = TTSModelHolder(
+        assets_root, device, torch_device_to_onnx_providers(device)
+    )
     app = create_inference_app(model_holder)
     app.launch(inbrowser=True)

gradio_tabs/merge.py

@@ -12,6 +12,7 @@ from config import get_path_config
 from style_bert_vits2.constants import DEFAULT_STYLE, GRADIO_THEME
 from style_bert_vits2.logging import logger
 from style_bert_vits2.tts_model import TTSModel, TTSModelHolder
+from style_bert_vits2.utils import torch_device_to_onnx_providers
 
 
 voice_keys = ["dec"]
@@ -1524,8 +1525,9 @@ def create_merge_app(model_holder: TTSModelHolder) -> gr.Blocks:
 
 
 if __name__ == "__main__":
+    device = "cuda" if torch.cuda.is_available() else "cpu"
     model_holder = TTSModelHolder(
-        assets_root, device="cuda" if torch.cuda.is_available() else "cpu"
+        assets_root, device, torch_device_to_onnx_providers(device)
     )
     app = create_merge_app(model_holder)
     app.launch(inbrowser=True)

server_editor.py

@@ -53,6 +53,7 @@ from style_bert_vits2.nlp.japanese.user_dict import (
     update_dict,
 )
 from style_bert_vits2.tts_model import TTSModelHolder, TTSModelInfo
+from style_bert_vits2.utils import torch_device_to_onnx_providers
 
 
 # ---フロントエンド部分に関する処理---
@@ -193,14 +194,14 @@ skip_static_files = bool(args.skip_static_files)
 ## server_editor.py は日本語にしか対応していないため、日本語の BERT モデル/トークナイザーのみロードする
 bert_models.load_model(Languages.JP, device_map=device)
 bert_models.load_tokenizer(Languages.JP)
-if device == "cpu":
+onnx_bert_models.load_model(
-    onnx_provider = "CPUExecutionProvider"
+    Languages.JP, onnx_providers=torch_device_to_onnx_providers(device)
-else:
+)
-    onnx_provider = ("CUDAExecutionProvider", {"cudnn_conv_algo_search": "DEFAULT"})
-onnx_bert_models.load_model(Languages.JP, onnx_providers=[onnx_provider])
 onnx_bert_models.load_tokenizer(Languages.JP)
 
-model_holder = TTSModelHolder(model_dir, device)
+model_holder = TTSModelHolder(
+    model_dir, device, torch_device_to_onnx_providers(device)
+)
 if len(model_holder.model_names) == 0:
     logger.error(f"Models not found in {model_dir}.")
     sys.exit(1)

server_fastapi.py

@@ -38,6 +38,7 @@ from style_bert_vits2.nlp import bert_models, onnx_bert_models
 from style_bert_vits2.nlp.japanese import pyopenjtalk_worker as pyopenjtalk
 from style_bert_vits2.nlp.japanese.user_dict import update_dict
 from style_bert_vits2.tts_model import TTSModel, TTSModelHolder
+from style_bert_vits2.utils import torch_device_to_onnx_providers
 
 
 config = get_config()
@@ -103,15 +104,15 @@ if __name__ == "__main__":
     bert_models.load_tokenizer(Languages.EN)
     bert_models.load_model(Languages.ZH, device_map=device)
     bert_models.load_tokenizer(Languages.ZH)
-    if device == "cpu":
+    onnx_bert_models.load_model(
-        onnx_provider = "CPUExecutionProvider"
+        Languages.JP, onnx_providers=torch_device_to_onnx_providers(device)
-    else:
+    )
-        onnx_provider = ("CUDAExecutionProvider", {"cudnn_conv_algo_search": "DEFAULT"})
-    onnx_bert_models.load_model(Languages.JP, onnx_providers=[onnx_provider])
     onnx_bert_models.load_tokenizer(Languages.JP)
 
     model_dir = Path(args.dir)
-    model_holder = TTSModelHolder(model_dir, device)
+    model_holder = TTSModelHolder(
+        model_dir, device, torch_device_to_onnx_providers(device)
+    )
     if len(model_holder.model_names) == 0:
         logger.error(f"Models not found in {model_dir}.")
         sys.exit(1)

style_bert_vits2/tts_model.py

@@ -131,6 +131,9 @@ class TTSModel:
                 device=self.device,
                 hps=self.hyper_parameters,
             )
+            logger.info(
+                f"Model loaded successfully from {self.model_path} to \"{self.device}\" device ({time.time() - start_time:.2f}s)"
+            )
 
         # ONNX 推論時
         else:
@@ -138,9 +141,8 @@ class TTSModel:
                 path_or_bytes=str(self.model_path),
                 providers=self.onnx_providers,
             )
-
             logger.info(
-            f"Model loaded successfully from {self.model_path} ({time.time() - start_time:.2f}s)"
+                f"Model loaded successfully from {self.model_path} to {self.onnx_session.get_providers()[0]} ({time.time() - start_time:.2f}s)"
             )
 
     def get_style_vector(self, style_id: int, weight: float = 1.0) -> NDArray[Any]:
@@ -447,13 +449,18 @@ class TTSModelInfo(BaseModel):
 
 class TTSModelHolder:
     """
-    Style-Bert-Vits2 の音声合成モデルを管理するクラス。
+    Style-Bert-VITS2 の音声合成モデルを管理するクラス。
     model_holder.models_info から指定されたディレクトリ内にある音声合成モデルの一覧を取得できる。
     """
 
-    def __init__(self, model_root_dir: Path, device: str) -> None:
+    def __init__(
+        self,
+        model_root_dir: Path,
+        device: str,
+        onnx_providers: Sequence[Union[str, tuple[str, dict[str, Any]]]],
+    ) -> None:
         """
-        Style-Bert-Vits2 の音声合成モデルを管理するクラスを初期化する。
+        Style-Bert-VITS2 の音声合成モデルを管理するクラスを初期化する。
         音声合成モデルは下記のように配置されていることを前提とする (.safetensors / .onnx のファイル名は自由) 。
         ```
         model_root_dir
@@ -470,11 +477,13 @@ class TTSModelHolder:
 
         Args:
             model_root_dir (Path): 音声合成モデルが配置されているディレクトリのパス
-            device (str): 音声合成時に利用するデバイス (cpu, cuda, mps など)
+            device (str): PyTorch 推論での音声合成時に利用するデバイス (cpu, cuda, mps など)
+            onnx_providers (list[str]): ONNX 推論で利用する ExecutionProvider (CPUExecutionProvider, CUDAExecutionProvider など)
         """
 
         self.root_dir: Path = model_root_dir
         self.device: str = device
+        self.onnx_providers: Sequence[Union[str, tuple[str, dict[str, Any]]]] = onnx_providers  # fmt: skip
         self.model_files_dict: dict[str, list[Path]] = {}
         self.current_model: Optional[TTSModel] = None
         self.model_names: list[str] = []
@@ -551,6 +560,7 @@ class TTSModelHolder:
                 config_path=self.root_dir / model_name / "config.json",
                 style_vec_path=self.root_dir / model_name / "style_vectors.npy",
                 device=self.device,
+                onnx_providers=self.onnx_providers,
             )
 
         return self.current_model
@@ -580,6 +590,7 @@ class TTSModelHolder:
             config_path=self.root_dir / model_name / "config.json",
             style_vec_path=self.root_dir / model_name / "style_vectors.npy",
             device=self.device,
+            onnx_providers=self.onnx_providers,
         )
         speakers = list(self.current_model.spk2id.keys())
         styles = list(self.current_model.style2id.keys())

style_bert_vits2/utils/__init__.py

@@ -0,0 +1,15 @@
+from typing import Any, Sequence, Union
+
+
+def torch_device_to_onnx_providers(
+    device: str,
+) -> Sequence[Union[str, tuple[str, dict[str, Any]]]]:
+    if device.startswith("cuda"):
+        # cudnn_conv_algo_search を DEFAULT にすると推論速度が大幅に向上する
+        # ref: https://medium.com/neuml/debug-onnx-gpu-performance-c9290fe07459
+        return [
+            ("CUDAExecutionProvider", {"cudnn_conv_algo_search": "DEFAULT"}),
+            ("CPUExecutionProvider", {}),
+        ]
+    else:
+        return ["CPUExecutionProvider"]

tests/test_main.py

@@ -5,10 +5,13 @@ from style_bert_vits2.constants import BASE_DIR, Languages
 from style_bert_vits2.tts_model import TTSModelHolder
 
 
-def synthesize(device: str = "cpu"):
+def synthesize(
+    device: str = "cpu",
+    onnx_providers: list[str] = ["CPUExecutionProvider"],
+):
 
     # 音声合成モデルが配置されていれば、音声合成を実行
-    model_holder = TTSModelHolder(BASE_DIR / "model_assets", device)
+    model_holder = TTSModelHolder(BASE_DIR / "model_assets", device, onnx_providers)
     if len(model_holder.models_info) > 0:
 
         # jvnv-F2-jp モデルを探す