[Model] Add IndexTTS2 text-to-speech support (#3838)

Signed-off-by: BeatSeat <wendavid552@gmail.com>
Signed-off-by: David <david@podcast.ai>
Signed-off-by: wendavid552 <wendavid552@gmail.com>
Signed-off-by: WenDavid <davidzhangcf@foxmail.com>

vllm_omni/engine/arg_utils.py

@@ -20,6 +20,8 @@ logger = init_logger(__name__)
 _ARCH_TO_MODEL_TYPE: dict[str, str] = {
     "CosyVoice3Model": "cosyvoice3",
     "GLMTTSForConditionalGeneration": "glm_tts",
+    "IndexTTS2S2MelDecoder": "indextts2",
+    "IndexTTS2TalkerForConditionalGeneration": "indextts2",
     "OmniVoiceModel": "omnivoice",
     "VoxCPM2TalkerForConditionalGeneration": "voxcpm2",
 }
@@ -35,6 +37,9 @@ def _register_omni_hf_configs() -> None:
     try:
         from transformers import AutoConfig
 
+        from vllm_omni.model_executor.models.indextts2.configuration_indextts2 import (
+            IndexTTS2Config,
+        )
         from vllm_omni.model_executor.models.ming_tts.config_ming_tts import MingDenseConfig
         from vllm_omni.model_executor.models.qwen3_tts.configuration_qwen3_tts import (
             Qwen3TTSConfig,
@@ -57,6 +62,7 @@ def _register_omni_hf_configs() -> None:
 
     for model_type, config_cls in [
         ("dense", MingDenseConfig),
+        ("indextts2", IndexTTS2Config),
         ("qwen3_tts", Qwen3TTSConfig),
         ("cosyvoice3", CosyVoice3Config),
         ("glm_tts", GLMTTSConfig),