wolfplus
2 years ago
10 changed files with 448 additions and 732 deletions
@ -1,572 +0,0 @@ |
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package com.example.deep_voice |
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import android.content.Context |
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import android.media.audiofx.AcousticEchoCanceler |
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import android.media.audiofx.NoiseSuppressor |
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import android.media.audiofx.AutomaticGainControl |
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import android.media.AudioManager |
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import android.os.Build |
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import android.util.Log |
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import io.flutter.embedding.engine.plugins.FlutterPlugin |
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import io.flutter.plugin.common.MethodCall |
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import io.flutter.plugin.common.MethodChannel |
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import io.flutter.plugin.common.MethodChannel.MethodCallHandler |
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import io.flutter.plugin.common.MethodChannel.Result |
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import io.flutter.embedding.engine.plugins.activity.ActivityAware |
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import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding |
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import android.app.Application |
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import io.flutter.embedding.engine.plugins.FlutterPlugin.FlutterPluginBinding |
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import io.flutter.embedding.engine.FlutterEngine |
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import io.flutter.FlutterInjector |
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/** |
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* 音频处理插件 |
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* |
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* 提供回音消除、降噪和自动增益控制等功能 |
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*/ |
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class AudioProcessingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware { |
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private lateinit var channel: MethodChannel |
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private lateinit var context: Context |
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private lateinit var audioManager: AudioManager |
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// 音频处理组件 |
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private var echoCanceler: AcousticEchoCanceler? = null |
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private var noiseSuppressor: NoiseSuppressor? = null |
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private var automaticGainControl: AutomaticGainControl? = null |
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// 当前音频会话ID |
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private var currentAudioSessionId: Int = -1 |
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companion object { |
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private const val TAG = "AudioProcessingPlugin" |
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private const val CHANNEL_NAME = "com.deep_voice.audio_processing" |
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// 保存静态实例，确保在任何地方都能访问 |
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@JvmStatic |
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private var instance: AudioProcessingPlugin? = null |
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// 保存应用Context |
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@JvmStatic |
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private var applicationContext: Context? = null |
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// 静态初始化块，尝试在类加载时就获取applicationContext |
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init { |
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try { |
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Log.i(TAG, "AudioProcessingPlugin静态初始化块被执行") |
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// 尝试通过FlutterInjector获取applicationContext |
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val flutterLoader = FlutterInjector.instance().flutterLoader() |
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if (flutterLoader.initialized()) { |
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Log.i(TAG, "FlutterLoader已初始化") |
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} else { |
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Log.i(TAG, "FlutterLoader尚未初始化") |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "静态初始化块执行失败: ${e.message}") |
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} |
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} |
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// 获取实例的方法 |
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@JvmStatic |
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fun getInstance(): AudioProcessingPlugin? { |
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return instance |
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} |
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// 获取应用Context的方法 |
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@JvmStatic |
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fun getApplicationContext(): Context? { |
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return applicationContext |
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} |
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// 设置应用Context的方法，可以从外部调用 |
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@JvmStatic |
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fun setApplicationContext(ctx: Context) { |
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if (applicationContext == null) { |
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applicationContext = ctx.applicationContext |
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Log.i(TAG, "通过setApplicationContext方法设置了applicationContext") |
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} |
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} |
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} |
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// 构造函数，尝试获取applicationContext |
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init { |
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Log.i(TAG, "AudioProcessingPlugin实例初始化块被执行") |
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} |
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override fun onAttachedToEngine(binding: FlutterPluginBinding) { |
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Log.i(TAG, "onAttachedToEngine被调用") |
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context = binding.applicationContext |
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applicationContext = context |
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audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager |
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channel = MethodChannel(binding.binaryMessenger, CHANNEL_NAME) |
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channel.setMethodCallHandler(this) |
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instance = this |
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Log.i(TAG, "音频处理插件已初始化，context: $context, applicationContext: $applicationContext") |
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} |
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override fun onDetachedFromEngine(binding: FlutterPluginBinding) { |
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channel.setMethodCallHandler(null) |
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releaseAudioEffects() |
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if (instance == this) { |
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instance = null |
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} |
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Log.i(TAG, "音频处理插件已释放") |
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} |
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// 实现ActivityAware接口，获取Activity上下文 |
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override fun onAttachedToActivity(binding: ActivityPluginBinding) { |
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Log.i(TAG, "onAttachedToActivity被调用") |
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// 如果context尚未初始化，使用Activity上下文 |
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if (!::context.isInitialized) { |
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context = binding.activity |
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Log.i(TAG, "使用Activity上下文初始化context") |
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// 如果audioManager尚未初始化，初始化它 |
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if (!::audioManager.isInitialized) { |
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audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager |
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Log.i(TAG, "使用Activity上下文初始化audioManager") |
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} |
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} |
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} |
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override fun onDetachedFromActivity() { |
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Log.i(TAG, "onDetachedFromActivity被调用") |
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} |
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override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) { |
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onAttachedToActivity(binding) |
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} |
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override fun onDetachedFromActivityForConfigChanges() { |
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onDetachedFromActivity() |
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} |
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override fun onMethodCall(call: MethodCall, result: Result) { |
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when (call.method) { |
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"isEchoCancellationAvailable" -> { |
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result.success(AcousticEchoCanceler.isAvailable()) |
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} |
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"isNoiseSuppressionAvailable" -> { |
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result.success(NoiseSuppressor.isAvailable()) |
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} |
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"enableEchoCancellation" -> { |
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val audioSessionId = call.argument<Int>("audioSessionId") |
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if (audioSessionId == null) { |
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result.error("INVALID_ARGUMENT", "音频会话ID不能为空", null) |
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return |
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} |
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result.success(enableEchoCancellation(audioSessionId)) |
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} |
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"disableEchoCancellation" -> { |
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result.success(disableEchoCancellation()) |
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} |
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"enableNoiseSuppression" -> { |
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val audioSessionId = call.argument<Int>("audioSessionId") |
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if (audioSessionId == null) { |
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result.error("INVALID_ARGUMENT", "音频会话ID不能为空", null) |
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return |
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} |
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result.success(enableNoiseSuppression(audioSessionId)) |
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} |
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"disableNoiseSuppression" -> { |
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result.success(disableNoiseSuppression()) |
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} |
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"getAudioSessionId" -> { |
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// 尝试获取当前活动的音频会话ID |
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try { |
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Log.i(TAG, "getAudioSessionId方法被调用") |
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// 检查applicationContext是否已初始化 |
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if (applicationContext != null) { |
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Log.i(TAG, "静态applicationContext已初始化") |
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// 如果context尚未初始化，使用applicationContext |
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if (!::context.isInitialized) { |
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context = applicationContext!! |
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Log.i(TAG, "使用静态applicationContext初始化context") |
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} |
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} else { |
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Log.w(TAG, "静态applicationContext尚未初始化") |
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} |
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// 检查context是否初始化 |
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if (!::context.isInitialized) { |
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Log.e(TAG, "context尚未初始化，尝试从静态实例获取") |
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// 尝试从静态实例获取context |
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val staticInstance = getInstance() |
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if (staticInstance != null) { |
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try { |
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// 尝试访问context，如果未初始化会抛出异常 |
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val testContext = staticInstance.context |
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context = testContext |
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Log.i(TAG, "从静态实例获取context成功") |
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} catch (e: UninitializedPropertyAccessException) { |
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Log.e(TAG, "静态实例的context也未初始化: ${e.message}") |
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// 尝试使用应用级别的Context |
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val appContext = getApplicationContext() |
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if (appContext != null) { |
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context = appContext |
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Log.i(TAG, "使用应用级别的Context初始化成功") |
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} else { |
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Log.e(TAG, "无法获取任何有效的Context，无法获取音频会话ID") |
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result.success(-1) |
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return |
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} |
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} |
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} else { |
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// 尝试使用应用级别的Context |
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val appContext = getApplicationContext() |
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if (appContext != null) { |
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context = appContext |
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Log.i(TAG, "使用应用级别的Context初始化成功") |
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} else { |
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Log.e(TAG, "无法获取context，无法获取音频会话ID") |
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result.success(-1) |
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return |
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} |
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} |
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} |
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// 检查audioManager是否初始化，如果没有则初始化 |
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if (!::audioManager.isInitialized) { |
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Log.w(TAG, "audioManager尚未初始化，正在初始化") |
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try { |
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audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager |
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Log.i(TAG, "audioManager初始化成功") |
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} catch (e: Exception) { |
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Log.e(TAG, "初始化audioManager失败: ${e.message}") |
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result.success(-1) |
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return |
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} |
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} |
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// 使用ensureValidAudioSessionId方法获取有效的音频会话ID |
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val sessionId = ensureValidAudioSessionId() |
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Log.i(TAG, "返回音频会话ID: $sessionId") |
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result.success(sessionId) |
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} catch (e: Exception) { |
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Log.e(TAG, "获取音频会话ID失败: ${e.message}") |
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result.success(-1) |
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} |
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} |
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else -> { |
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result.notImplemented() |
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} |
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} |
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} |
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/** |
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* 启用回音消除 |
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* |
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* @param audioSessionId 音频会话ID |
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* @return 是否成功启用 |
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*/ |
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private fun enableEchoCancellation(audioSessionId: Int): Boolean { |
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if (!AcousticEchoCanceler.isAvailable()) { |
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Log.w(TAG, "设备不支持回音消除") |
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return false |
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} |
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try { |
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Log.i(TAG, "尝试启用回音消除，音频会话ID: $audioSessionId") |
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// 确保context已初始化 |
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if (!::context.isInitialized) { |
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Log.w(TAG, "context尚未初始化，尝试获取") |
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// 尝试从静态实例或应用级别获取context |
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val staticInstance = getInstance() |
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if (staticInstance != null && try { staticInstance.context; true } catch (e: Exception) { false }) { |
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context = staticInstance.context |
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} else { |
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val appContext = getApplicationContext() |
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if (appContext != null) { |
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context = appContext |
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} else { |
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Log.e(TAG, "无法获取context，无法启用回音消除") |
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return false |
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} |
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} |
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} |
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// 确保audioManager已初始化 |
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if (!::audioManager.isInitialized) { |
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try { |
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audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager |
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Log.i(TAG, "audioManager初始化成功") |
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} catch (e: Exception) { |
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Log.e(TAG, "初始化audioManager失败: ${e.message}") |
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return false |
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} |
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} |
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// 如果已经创建了回音消除器，先释放 |
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if (echoCanceler != null) { |
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echoCanceler?.release() |
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echoCanceler = null |
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} |
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// 创建新的回音消除器 |
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echoCanceler = AcousticEchoCanceler.create(audioSessionId) |
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if (echoCanceler == null) { |
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Log.e(TAG, "创建回音消除器失败") |
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return false |
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} |
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// 启用回音消除 |
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echoCanceler?.enabled = true |
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currentAudioSessionId = audioSessionId |
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Log.i(TAG, "回音消除已启用，音频会话ID: $audioSessionId") |
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return echoCanceler?.enabled == true |
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} catch (e: Exception) { |
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Log.e(TAG, "启用回音消除失败: ${e.message}") |
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return false |
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} |
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} |
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/** |
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* 禁用回音消除 |
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* |
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* @return 是否成功禁用 |
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*/ |
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private fun disableEchoCancellation(): Boolean { |
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if (echoCanceler == null) { |
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return true |
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} |
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try { |
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echoCanceler?.enabled = false |
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echoCanceler?.release() |
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echoCanceler = null |
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Log.i(TAG, "回音消除已禁用") |
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return true |
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} catch (e: Exception) { |
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Log.e(TAG, "禁用回音消除失败: ${e.message}") |
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return false |
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} |
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} |
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/** |
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* 启用噪声抑制 |
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* |
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* @param audioSessionId 音频会话ID |
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* @return 是否成功启用 |
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*/ |
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private fun enableNoiseSuppression(audioSessionId: Int): Boolean { |
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if (!NoiseSuppressor.isAvailable()) { |
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Log.w(TAG, "设备不支持噪声抑制") |
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return false |
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} |
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try { |
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Log.i(TAG, "尝试启用噪声抑制，音频会话ID: $audioSessionId") |
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// 确保context已初始化 |
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if (!::context.isInitialized) { |
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Log.w(TAG, "context尚未初始化，尝试获取") |
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// 尝试从静态实例或应用级别获取context |
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val staticInstance = getInstance() |
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if (staticInstance != null && try { staticInstance.context; true } catch (e: Exception) { false }) { |
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context = staticInstance.context |
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} else { |
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val appContext = getApplicationContext() |
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if (appContext != null) { |
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context = appContext |
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} else { |
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Log.e(TAG, "无法获取context，无法启用噪声抑制") |
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return false |
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} |
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} |
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} |
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// 确保audioManager已初始化 |
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if (!::audioManager.isInitialized) { |
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try { |
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audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager |
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Log.i(TAG, "audioManager初始化成功") |
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} catch (e: Exception) { |
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Log.e(TAG, "初始化audioManager失败: ${e.message}") |
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return false |
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} |
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} |
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// 如果已经创建了噪声抑制器，先释放 |
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if (noiseSuppressor != null) { |
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noiseSuppressor?.release() |
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noiseSuppressor = null |
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} |
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// 创建新的噪声抑制器 |
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noiseSuppressor = NoiseSuppressor.create(audioSessionId) |
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if (noiseSuppressor == null) { |
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Log.e(TAG, "创建噪声抑制器失败") |
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return false |
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} |
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// 启用噪声抑制 |
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noiseSuppressor?.enabled = true |
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currentAudioSessionId = audioSessionId |
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Log.i(TAG, "噪声抑制已启用，音频会话ID: $audioSessionId") |
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return noiseSuppressor?.enabled == true |
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} catch (e: Exception) { |
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Log.e(TAG, "启用噪声抑制失败: ${e.message}") |
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return false |
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} |
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} |
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/** |
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* 禁用噪声抑制 |
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* |
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* @return 是否成功禁用 |
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*/ |
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private fun disableNoiseSuppression(): Boolean { |
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if (noiseSuppressor == null) { |
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return true |
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} |
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try { |
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noiseSuppressor?.enabled = false |
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noiseSuppressor?.release() |
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noiseSuppressor = null |
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Log.i(TAG, "噪声抑制已禁用") |
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return true |
|
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} catch (e: Exception) { |
|
||||
Log.e(TAG, "禁用噪声抑制失败: ${e.message}") |
|
||||
return false |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
/** |
|
||||
* 释放所有音频效果 |
|
||||
*/ |
|
||||
private fun releaseAudioEffects() { |
|
||||
try { |
|
||||
echoCanceler?.release() |
|
||||
echoCanceler = null |
|
||||
|
|
||||
noiseSuppressor?.release() |
|
||||
noiseSuppressor = null |
|
||||
|
|
||||
automaticGainControl?.release() |
|
||||
automaticGainControl = null |
|
||||
|
|
||||
currentAudioSessionId = -1 |
|
||||
Log.i(TAG, "所有音频效果已释放") |
|
||||
} catch (e: Exception) { |
|
||||
Log.e(TAG, "释放音频效果失败: ${e.message}") |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
/** |
|
||||
* 检查音频会话ID是否有效，如果无效则创建一个新的 |
|
||||
* |
|
||||
* @return 有效的音频会话ID |
|
||||
*/ |
|
||||
private fun ensureValidAudioSessionId(): Int { |
|
||||
// 如果已经有有效的音频会话ID，直接返回 |
|
||||
if (currentAudioSessionId > 0) { |
|
||||
Log.i(TAG, "使用已存在的音频会话ID: $currentAudioSessionId") |
|
||||
return currentAudioSessionId |
|
||||
} |
|
||||
|
|
||||
Log.i(TAG, "尝试创建有效的音频会话ID") |
|
||||
|
|
||||
// 尝试从AudioManager获取音频会话ID |
|
||||
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && ::audioManager.isInitialized) { |
|
||||
try { |
|
||||
val audioAttributes = audioManager.getActivePlaybackConfigurations() |
|
||||
if (audioAttributes.isNotEmpty()) { |
|
||||
val sessionId = audioAttributes[0].audioAttributes.usage |
|
||||
if (sessionId > 0) { |
|
||||
currentAudioSessionId = sessionId |
|
||||
Log.i(TAG, "从AudioManager获取到音频会话ID: $sessionId") |
|
||||
return sessionId |
|
||||
} |
|
||||
} |
|
||||
} catch (e: Exception) { |
|
||||
Log.e(TAG, "从AudioManager获取音频会话ID失败: ${e.message}") |
|
||||
} |
|
||||
} |
|
||||
|
|
||||
// 尝试创建一个临时的AudioTrack来获取会话ID |
|
||||
try { |
|
||||
val audioTrack = android.media.AudioTrack( |
|
||||
android.media.AudioAttributes.Builder() |
|
||||
.setUsage(android.media.AudioAttributes.USAGE_MEDIA) |
|
||||
.setContentType(android.media.AudioAttributes.CONTENT_TYPE_SPEECH) |
|
||||
.build(), |
|
||||
android.media.AudioFormat.Builder() |
|
||||
.setSampleRate(16000) |
|
||||
.setChannelMask(android.media.AudioFormat.CHANNEL_OUT_MONO) |
|
||||
.setEncoding(android.media.AudioFormat.ENCODING_PCM_16BIT) |
|
||||
.build(), |
|
||||
1024, // 最小缓冲区大小 |
|
||||
android.media.AudioTrack.MODE_STREAM, |
|
||||
android.media.AudioManager.AUDIO_SESSION_ID_GENERATE |
|
||||
) |
|
||||
|
|
||||
val generatedSessionId = audioTrack.audioSessionId |
|
||||
if (generatedSessionId > 0) { |
|
||||
currentAudioSessionId = generatedSessionId |
|
||||
Log.i(TAG, "成功创建临时AudioTrack并获取音频会话ID: $generatedSessionId") |
|
||||
|
|
||||
// 释放AudioTrack资源 |
|
||||
audioTrack.release() |
|
||||
|
|
||||
return generatedSessionId |
|
||||
} else { |
|
||||
Log.w(TAG, "创建的AudioTrack未返回有效的音频会话ID") |
|
||||
audioTrack.release() |
|
||||
} |
|
||||
} catch (e: Exception) { |
|
||||
Log.e(TAG, "创建临时AudioTrack失败: ${e.message}") |
|
||||
} |
|
||||
|
|
||||
// 尝试创建一个临时的AudioRecord来获取会话ID |
|
||||
try { |
|
||||
val minBufferSize = android.media.AudioRecord.getMinBufferSize( |
|
||||
16000, |
|
||||
android.media.AudioFormat.CHANNEL_IN_MONO, |
|
||||
android.media.AudioFormat.ENCODING_PCM_16BIT |
|
||||
) |
|
||||
|
|
||||
if (minBufferSize > 0) { |
|
||||
val audioRecord = android.media.AudioRecord( |
|
||||
android.media.MediaRecorder.AudioSource.MIC, |
|
||||
16000, |
|
||||
android.media.AudioFormat.CHANNEL_IN_MONO, |
|
||||
android.media.AudioFormat.ENCODING_PCM_16BIT, |
|
||||
minBufferSize |
|
||||
) |
|
||||
|
|
||||
val recordSessionId = audioRecord.audioSessionId |
|
||||
if (recordSessionId > 0) { |
|
||||
currentAudioSessionId = recordSessionId |
|
||||
Log.i(TAG, "成功创建临时AudioRecord并获取音频会话ID: $recordSessionId") |
|
||||
|
|
||||
// 释放AudioRecord资源 |
|
||||
audioRecord.release() |
|
||||
|
|
||||
return recordSessionId |
|
||||
} else { |
|
||||
Log.w(TAG, "创建的AudioRecord未返回有效的音频会话ID") |
|
||||
audioRecord.release() |
|
||||
} |
|
||||
} else { |
|
||||
Log.w(TAG, "无法获取有效的AudioRecord最小缓冲区大小") |
|
||||
} |
|
||||
} catch (e: Exception) { |
|
||||
Log.e(TAG, "创建临时AudioRecord失败: ${e.message}") |
|
||||
} |
|
||||
|
|
||||
// 如果以上方法都失败，使用一个固定的默认值 |
|
||||
val defaultSessionId = 1 |
|
||||
Log.w(TAG, "使用默认音频会话ID: $defaultSessionId") |
|
||||
currentAudioSessionId = defaultSessionId |
|
||||
return defaultSessionId |
|
||||
} |
|
||||
} |
|
||||
Loading…
Reference in new issue