add

local_plugins/bytedance_speech/android/src/main/kotlin/com/deep_voice/bytedance_speech/BytedanceAudioPlayer.kt

@@ -15,12 +15,13 @@ import com.deep_voice.speech.tts.AudioDataListener
 import com.deep_voice.speech.tts.AudioOutputDevice
 
 /**
- * 高性能音频播放器 - 16kHz采样率
+ * 语音通信音频播放器 - 16kHz采样率
  * 设计要点：
- * • 永远使用 USAGE_MEDIA + MODE_NORMAL 媒体播放通路
+ * • 使用 USAGE_VOICE_COMMUNICATION + MODE_IN_COMMUNICATION 通信通路
  * • 利用 AudioDeviceCallback 监听设备热插拔
  * • API 31+ 使用 setPreferredDevice() 精准路由
  * • 有耳机自动从耳机播放，无耳机自动切到扬声器
+ * • 内置回声消除和噪音抑制功能
  */
 class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, AudioDeviceCallback() {
     companion object {
@@ -35,6 +36,35 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
     private var isFirstData = true
     private var totalBytesWritten = 0
     private var sessionActive = true
+    private var audioFocusRequest: Any? = null  // 兼容不同API版本
+    
+    // 音频焦点变化监听器
+    private val audioFocusChangeListener = AudioManager.OnAudioFocusChangeListener { focusChange ->
+        when (focusChange) {
+            AudioManager.AUDIOFOCUS_LOSS -> {
+                // 永久失去焦点，停止播放
+                Log.d(TAG, "音频焦点丢失")
+                stop()
+            }
+            AudioManager.AUDIOFOCUS_LOSS_TRANSIENT -> {
+                // 暂时失去焦点，暂停播放
+                Log.d(TAG, "音频焦点暂时丢失")
+                audioTrack?.pause()
+            }
+            AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK -> {
+                // 暂时失去焦点但可降低音量，这里选择暂停
+                Log.d(TAG, "音频焦点暂时丢失（可降低音量）")
+                audioTrack?.pause()
+            }
+            AudioManager.AUDIOFOCUS_GAIN -> {
+                // 重新获得焦点，恢复播放
+                Log.d(TAG, "音频焦点恢复")
+                if (sessionActive) {
+                    audioTrack?.play()
+                }
+            }
+        }
+    }
     
     // 回调
     private var onPlayStarted: (() -> Unit)? = null
@@ -62,6 +92,8 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
     init {
         // 注册设备热插拔监听
         audioManager.registerAudioDeviceCallback(this, Handler(Looper.getMainLooper()))
+        // 请求音频焦点
+        requestAudioFocus()
         buildTrack(selectOutputDevice())  // 首次创建
     }
     
@@ -126,7 +158,7 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
         audioTrack = AudioTrack.Builder()
             .setAudioAttributes(
                 AudioAttributes.Builder()
-                    .setUsage(AudioAttributes.USAGE_MEDIA)  // 统一媒体通路
+                    .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)  // 语音通信通路
                     .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
                     .build()
             )
@@ -159,8 +191,8 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
                 track.play()
             }
         
-        // 配置音频管理器 - 统一使用 MODE_NORMAL
+        // 配置音频管理器 - 使用通信模式以启用回声消除和噪音抑制
-        audioManager.mode = AudioManager.MODE_NORMAL
+        audioManager.mode = AudioManager.MODE_IN_COMMUNICATION
         // 切换扬声器开关仅在无耳机时打开
         audioManager.isSpeakerphoneOn = (device == null)
         
@@ -168,6 +200,71 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
         Log.d(TAG, "AudioTrack已创建 - 输出设备: $deviceName, 采样率: ${SAMPLE_RATE}Hz")
     }
     
+    /**
+     * 请求音频焦点
+     */
+    private fun requestAudioFocus() {
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                // Android O及以上使用新的API
+                val focusRequest = android.media.AudioFocusRequest.Builder(
+                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK
+                )
+                    .setAudioAttributes(
+                        AudioAttributes.Builder()
+                            .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
+                            .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+                            .build()
+                    )
+                    .setAcceptsDelayedFocusGain(true)
+                    .setOnAudioFocusChangeListener(audioFocusChangeListener)
+                    .build()
+                
+                val result = audioManager.requestAudioFocus(focusRequest)
+                if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
+                    audioFocusRequest = focusRequest
+                    Log.d(TAG, "音频焦点请求成功")
+                } else {
+                    Log.w(TAG, "音频焦点请求失败")
+                }
+            } else {
+                // Android O以下使用旧的API
+                @Suppress("DEPRECATION")
+                val result = audioManager.requestAudioFocus(
+                    audioFocusChangeListener,
+                    AudioManager.STREAM_VOICE_CALL,
+                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK
+                )
+                if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
+                    Log.d(TAG, "音频焦点请求成功（旧API）")
+                } else {
+                    Log.w(TAG, "音频焦点请求失败（旧API）")
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "请求音频焦点异常: ${e.message}")
+        }
+    }
+    
+    /**
+     * 释放音频焦点
+     */
+    private fun releaseAudioFocus() {
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                audioFocusRequest?.let {
+                    audioManager.abandonAudioFocusRequest(it as android.media.AudioFocusRequest)
+                }
+            } else {
+                @Suppress("DEPRECATION")
+                audioManager.abandonAudioFocus(audioFocusChangeListener)
+            }
+            Log.d(TAG, "音频焦点已释放")
+        } catch (e: Exception) {
+            Log.e(TAG, "释放音频焦点异常: ${e.message}")
+        }
+    }
+    
     /**
      * 开始新的播放会话
      */
@@ -262,7 +359,10 @@ class BytedanceAudioPlayer(private val context: Context) : AudioDataListener, Au
         stop()
         audioTrack?.release()
         audioTrack = null
+        releaseAudioFocus()
         audioManager.unregisterAudioDeviceCallback(this)
+        // 恢复音频模式
+        audioManager.mode = AudioManager.MODE_NORMAL
     }
     
     /**

local_plugins/bytedance_speech/android/src/main/kotlin/com/deep_voice/bytedance_speech/BytedanceTTS.kt

@@ -116,7 +116,7 @@ class BytedanceTTS(private val context: Context) : ITtsService, CoroutineScope {
     // TTS配置参数
     private var appId: String = ""
     private var accessToken: String = ""
-    private var speaker: String = "zh_female_shuangkuaisisi_emo_v2_mars_bigtts" // 默认语音，使用Java示例的音色
+    private var speaker: String = "zh_female_yuanqinvyou_moon_bigtts" // 默认语音，使用Java示例的音色
     private var format: String = "pcm"  // pcm 格式
     private var sampleRate: Int = 16000  // 使用16kHz采样率
     private var enableTimestamp: Boolean = false