fix(azure_speech): 改进音频捕获线程的异常处理和资源释放

添加线程优先级设置和更完善的异常处理逻辑
确保线程安全停止并释放资源
优化暂停状态下的CPU使用率

local_plugins/azure_speech/android/src/main/kotlin/com/yunqiinnovation/azure_speech/AzureAsrHelper.kt

@@ -822,39 +822,77 @@ class AzureAsrHelper(private val context: Context) {
 
         // 3. 单独封装线程启动逻辑
          fun startCaptureThread() {
-            // 开始录音
-            audioRecord?.startRecording()
-            captureThread = Thread {
-                // 根据实际采样率计算缓冲区大小
-                val supportedSampleRates = intArrayOf(16000, 8000, 11025, 22050, 44100)
-                var bufferSize = 0
-                // 查找设备支持的最佳采样率
-                val sampleRate = supportedSampleRates.firstOrNull { rate ->
-                    bufferSize = AudioRecord.getMinBufferSize(
-                        rate,
-                        AudioFormat.CHANNEL_IN_MONO,
-                        AudioFormat.ENCODING_PCM_16BIT
-                    )
-                    bufferSize > 0 // 返回正值表示支持
-                } ?: 16000 // 默认回退值
-
-                val buffer = ByteArray(bufferSize)
-
-                while (!Thread.interrupted() && audioRecord?.recordingState == AudioRecord.RECORDSTATE_RECORDING) {
-                    if (!isPaused) {
-                        // 读取音频
-                        val bytesRead = audioRecord?.read(buffer, 0, buffer.size) ?: 0
-                        if (bytesRead > 0) {
+            try {
+                // 确保之前的线程已停止
+                stopCaptureThread()
+                
+                // 开始录音
+                audioRecord?.startRecording()
+                
+                captureThread = Thread({
+                    android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO)
+                    
+                    val supportedSampleRates = intArrayOf(16000, 8000, 11025, 22050, 44100)
+                    var bufferSize = 0
+                    val sampleRate = supportedSampleRates.firstOrNull { rate ->
+                        bufferSize = AudioRecord.getMinBufferSize(
+                            rate,
+                            AudioFormat.CHANNEL_IN_MONO,
+                            AudioFormat.ENCODING_PCM_16BIT
+                        )
+                        bufferSize > 0
+                    } ?: 16000
+                    
+                    val buffer = ByteArray(bufferSize)
+                    
+                    try {
+                        while (!Thread.currentThread().isInterrupted && 
+                               audioRecord?.recordingState == AudioRecord.RECORDSTATE_RECORDING) {
                             
-                            // 写入Azure流
-                            pushAudioStream?.write(buffer)
-
-                            // 保存录音
-                            recordfile?.saveAudioDataToWav(buffer)
+                            if (!isPaused) {
+                                val bytesRead = audioRecord?.read(buffer, 0, buffer.size) ?: 0
+                                if (bytesRead > 0) {
+                                    // 安全地写入Azure流
+                                    try {
+                                        pushAudioStream?.write(buffer)
+                                        recordfile?.saveAudioDataToWav(buffer)
+                                    } catch (e: Exception) {
+                                        Log.w(tag, "写入音频流失败: ${e.message}")
+                                    }
+                                } else if (bytesRead < 0) {
+                                    Log.w(tag, "AudioRecord读取错误: $bytesRead")
+                                    break
+                                }
+                            } else {
+                                Thread.sleep(10) // 暂停时短暂休眠
+                            }
                         }
+                    } catch (e: InterruptedException) {
+                        Log.d(tag, "音频捕获线程被中断")
+                    } catch (e: Exception) {
+                        Log.e(tag, "音频捕获异常: ${e.message}", e)
+                    }
+                }, "AudioCaptureThread")
+                
+                captureThread?.start()
+            } catch (e: Exception) {
+                Log.e(tag, "启动音频捕获线程失败: ${e.message}", e)
+                throw e
+            }
+        }
+
+        private fun stopCaptureThread() {
+            captureThread?.let { thread ->
+                if (thread.isAlive) {
+                    thread.interrupt()
+                    try {
+                        thread.join(500) // 等待最多500ms
+                    } catch (e: InterruptedException) {
+                        Log.w(tag, "等待音频线程结束被中断")
                     }
                 }
-            }.apply { start() }
+            }
+            captureThread = null
         }
 
         /**
@@ -1050,4 +1088,4 @@ class AzureAsrHelper(private val context: Context) {
     }
 
 
-} 
+}