add：火山双向tts语音流式输入输出

main/xiaozhi-server/core/providers/tts/dto/dto.py

@@ -0,0 +1,42 @@
+from enum import Enum
+from typing import Union
+
+
+class MsgType(Enum):
+    # 请求类型
+    START_TTS_REQUEST = "START_TTS_REQUEST"
+    TTS_TEXT_REQUEST = "TTS_TEXT_REQUEST"
+    STOP_TTS_REQUEST = "STOP_TTS_REQUEST"
+
+    # 返回类型
+    START_TTS_RESPONSE = "START_TTS_RESPONSE"
+    TTS_TEXT_RESPONSE = "TTS_TEXT_RESPONSE"
+    STOP_TTS_RESPONSE = "STOP_TTS_RESPONSE"
+
+
+class SentenceType(Enum):
+    # 句子开始
+    SENTENCE_START = "SENTENCE_START"
+    # 句子结束
+    SENTENCE_END = "SENTENCE_END"
+
+
+class TTSMessageDTO:
+    def __init__(self, u_id: str, msg_type: MsgType, content: Union[str, bytes], tts_finish_text=None,
+                 sentence_type: SentenceType = None, duration=0):
+        if not isinstance(msg_type, MsgType):
+            raise ValueError("msg_type must be an instance of MsgType Enum")
+        if not isinstance(content, (str, list, bytes)):
+            raise ValueError("content must be of type str or bytes")
+
+        # 唯一id，每个合成到合成结束，使用同一个id
+        self.u_id = u_id
+        self.msg_type = msg_type
+        self.sentence_type = sentence_type
+        self.content = content
+        self.tts_finish_text = tts_finish_text
+        self.duration = duration
+
+    def __repr__(self):
+        content_preview = self.content if isinstance(self.content, str) else "<binary data>"
+        return f"MessageDTO(msg_type={self.msg_type}, content={content_preview})"