Add configuration files for FastGPT and Xfyun voice services, enhancing LLM service capabilities. Update LLMConfig to include chat_id, variables, detail, and timeout settings. Refactor create_llm_service to support FastGPT integration and adjust pipeline to handle chat_id and greeting prompts. Implement context synchronization for interrupted assistant turns in text streaming.

config/voice-fastgpt.example.json

@@ -0,0 +1,58 @@
+{
+  "server": {
+    "host": "0.0.0.0",
+    "port": 8000,
+    "cors_origins": ["*"]
+  },
+  "audio": {
+    "sample_rate_hz": 16000,
+    "channels": 1,
+    "frame_ms": 20
+  },
+  "session": {
+    "inactivity_timeout_sec": 60
+  },
+  "turn": {
+    "vad": {
+      "confidence": 0.7,
+      "start_secs": 0.2,
+      "stop_secs": 0.6,
+      "min_volume": 0.6
+    },
+    "interruption_min_chars": 3,
+    "interruption_use_interim": true,
+    "user_speech_timeout_sec": 1.0
+  },
+  "agent": {
+    "system_prompt": "FastGPT app owns the system prompt when send_system_prompt is false.",
+    "greeting": "你好",
+    "greeting_mode": "generated"
+  },
+  "services": {
+    "stt": {
+      "provider": "openai",
+      "api_key": "",
+      "base_url": null,
+      "model": "gpt-4o-mini-transcribe",
+      "language": "zh"
+    },
+    "llm": {
+      "provider": "fastgpt",
+      "api_key": "",
+      "base_url": null,
+      "model": "my-voice-app",
+      "chat_id": null,
+      "variables": {},
+      "detail": false,
+      "timeout_sec": 60.0,
+      "send_system_prompt": false
+    },
+    "tts": {
+      "provider": "openai",
+      "api_key": "",
+      "base_url": null,
+      "model": "gpt-4o-mini-tts",
+      "voice": "alloy"
+    }
+  }
+}

config/voice-xfyun.json

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+{
+  "server": {
+    "host": "0.0.0.0",
+    "port": 8000,
+    "cors_origins": ["*"]
+  },
+  "audio": {
+    "sample_rate_hz": 16000,
+    "channels": 1,
+    "frame_ms": 20
+  },
+  "session": {
+    "inactivity_timeout_sec": 60
+  },
+  "turn": {
+    "vad": {
+      "confidence": 0.7,
+      "start_secs": 0.35,
+      "stop_secs": 0.2,
+      "min_volume": 0.65
+    },
+    "interruption_min_chars": 3,
+    "interruption_use_interim": true,
+    "interruption_short_replies": [
+      "是",
+      "是的",
+      "对",
+      "对的",
+      "嗯",
+      "好",
+      "好的",
+      "行",
+      "可以",
+      "没问题",
+      "不是",
+      "不",
+      "不行",
+      "不用",
+      "不要",
+      "没有",
+      "否"
+    ],
+    "user_speech_timeout_sec": 0.2
+  },
+  "agent": {
+    "system_prompt": "# 角色 你是一个高度集成、安全第一的交警AI接警员。正在收集事故人员伤亡情况，时间，地点，事故原因，事故车辆数量，收集完成之后和用户说再见",
+    "greeting": "您好，这里是无锡交警，我将为您远程处理交通事故。请将人员撤离至路侧安全区域，开启危险报警双闪灯、放置三角警告牌、做好安全防护，谨防二次事故伤害。若您已经准备好了，请点击继续办理，如需人工服务，请说转人工。",
+    "greeting_mode": "fixed"
+  },
+  "services": {
+    "stt": {
+      "provider": "xfyun",
+      "app_id": "416ce125",
+      "api_key": "c65342fe603126c3610031d8429bb36d",
+      "api_secret": "MzkyYmI5OWEyODQzN2FiN2VhN2UzYzU4",
+      "base_url": "wss://iat-api.xfyun.cn/v2/iat",
+      "language": "zh_cn",
+      "domain": "iat",
+      "accent": "mandarin",
+      "encoding": "raw",
+      "frame_size": 1280,
+      "timeout_sec": 10.0
+    },
+    "llm": {
+      "provider": "openai",
+      "api_key": "sk-230701ff1b6143ecbf322b3170606016",
+      "base_url": "https://api.deepseek.com/v1",
+      "model": "deepseek-chat",
+      "temperature": 0.7
+    },
+    "tts": {
+      "provider": "xfyun",
+      "app_id": "416ce125",
+      "api_key": "c65342fe603126c3610031d8429bb36d",
+      "api_secret": "MzkyYmI5OWEyODQzN2FiN2VhN2UzYzU4",
+      "base_url": "wss://tts-api.xfyun.cn/v2/tts",
+      "voice": "x4_xiaoyan",
+      "aue": "raw",
+      "tte": "UTF8",
+      "speed": 50,
+      "volume": 50,
+      "pitch": 50,
+      "source_sample_rate_hz": 16000
+    }
+  }
+}