feat(api): support passing speaker/language id file paths

Author: eginhard

TTS/api.py

@@ -30,6 +30,8 @@ def __init__(
         vocoder_config_path: Optional[str] = None,
         encoder_path: Optional[str] = None,
         encoder_config_path: Optional[str] = None,
+        speakers_file_path: Optional[str] = None,
+        language_ids_file_path: Optional[str] = None,
         progress_bar: bool = True,
         gpu: bool = False,
     ) -> None:
@@ -68,8 +70,10 @@ def __init__(
             vocoder_config_path (str, optional): Path to the vocoder config. Defaults to None.
             encoder_path: Path to speaker encoder checkpoint. Default to None.
             encoder_config_path: Path to speaker encoder config file. Defaults to None.
-            progress_bar (bool, optional): Whether to pring a progress bar while downloading a model. Defaults to True.
-            gpu (bool, optional): Enable/disable GPU. Some models might be too slow on CPU. Defaults to False.
+            speakers_file_path: JSON file for multi-speaker model. Defaults to None.
+            language_ids_file_path: JSON file for multilingual model. Defaults to None
+            progress_bar (bool, optional): Whether to print a progress bar while downloading a model. Defaults to True.
+            gpu (bool, optional): Enable/disable GPU. Defaults to False. DEPRECATED, use TTS(...).to("cuda")
         """
         super().__init__()
         self.manager = ModelManager(models_file=self.get_models_file_path(), progress_bar=progress_bar)
@@ -82,6 +86,8 @@ def __init__(
         self.vocoder_config_path = vocoder_config_path
         self.encoder_path = encoder_path
         self.encoder_config_path = encoder_config_path
+        self.speakers_file_path = speakers_file_path
+        self.language_ids_file_path = language_ids_file_path
 
         if gpu:
             warnings.warn("`gpu` will be deprecated. Please use `tts.to(device)` instead.")
@@ -226,8 +232,8 @@ def load_tts_model_by_path(self, model_path: str, config_path: str, *, gpu: bool
         self.synthesizer = Synthesizer(
             tts_checkpoint=model_path,
             tts_config_path=config_path,
-            tts_speakers_file=None,
-            tts_languages_file=None,
+            tts_speakers_file=self.speakers_file_path,
+            tts_languages_file=self.language_ids_file_path,
             vocoder_checkpoint=self.vocoder_path,
             vocoder_config=self.vocoder_config_path,
             encoder_checkpoint=self.encoder_path,