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@ -54,11 +54,28 @@ public class SimpleAudioReceiver: NSObject { |
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// 初始化音频引擎 |
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audioEngine = AVAudioEngine() |
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isRunning = true |
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// 创建新的写线程 |
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writeThread = DispatchQueue(label: "audio.stream.writer") |
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startWriteThread() |
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// 配置音频引擎 |
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do { |
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try startCapture { buffer in |
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// 处理实时音频数据 |
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let channelData = buffer.floatChannelData?[0] |
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let frameCount = buffer.frameLength |
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print("麦克风启动: \(frameCount)") |
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print("🎵 音频数据: 帧数=\(frameCount), 声道数据=\(channelData != nil ? "有效" : "无效")") |
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self.writeQueue.put(self.audioBufferToData(buffer)) |
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// 分析或传输数据... |
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} |
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} catch { |
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print("麦克风启动失败: \(error)") |
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} |
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} |
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/// 获取最佳音频格式 (iOS 通常支持标准采样率) |
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@ -145,6 +162,7 @@ public class SimpleAudioReceiver: NSObject { |
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print("写入数据长度: \(dataToWrite.count)") |
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self.audioDataCallback!.onAudio(dataToWrite) |
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} |
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print("写入数据长度: \(dataToWrite.count)") |
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try self.pushAudioStream?.write(dataToWrite) |
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if self.recordfile != nil { |
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// print("写入recordfile数据长度: \(dataToWrite.count)") |
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@ -173,107 +191,113 @@ public class SimpleAudioReceiver: NSObject { |
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// 放入队列，由写线程写入 |
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writeQueue.put(data) |
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} |
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/** |
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* 开始采集音频数据 |
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* @param bufferHandler 音频缓冲区处理回调 |
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* @throws 音频配置或启动错误 |
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*/ |
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func startCapture(bufferHandler: @escaping (AVAudioPCMBuffer) -> Void) throws { |
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try setupAudioSession() |
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guard let audioEngine = audioEngine else { |
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throw NSError(domain: "SimpleAudioReceiver", code: -1, userInfo: [NSLocalizedDescriptionKey: "Audio engine not initialized"]) |
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} |
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// 确保音频引擎完全停止 |
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if audioEngine.isRunning { |
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audioEngine.stop() |
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// 等待一小段时间确保完全停止 |
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Thread.sleep(forTimeInterval: 0.1) |
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} |
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// 先安全地移除已存在的 tap |
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removeTapSafely() |
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// 重置音频引擎（在获取格式之前） |
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audioEngine.reset() |
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// 重新获取输入节点和格式（reset后需要重新获取） |
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let inputNode = audioEngine.inputNode |
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let inputFormat = inputNode.outputFormat(forBus: 0) |
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print("硬件输入格式: 采样率=\(inputFormat.sampleRate)Hz, 声道数=\(inputFormat.channelCount), 格式=\(inputFormat.commonFormat.rawValue)") |
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// 验证格式是否有效 |
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if inputFormat.sampleRate <= 0 || inputFormat.channelCount <= 0 { |
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// 如果格式无效，使用默认格式 |
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let defaultFormat = AVAudioFormat(standardFormatWithSampleRate: 48000, channels: 1)! |
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print("使用默认音频格式: 采样率=\(defaultFormat.sampleRate)Hz, 声道数=\(defaultFormat.channelCount)") |
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inputNode.installTap(onBus: 0, |
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bufferSize: 1024, |
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format: defaultFormat) { (buffer, time) in |
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bufferHandler(buffer) |
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} |
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} else { |
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// 使用硬件原生格式 |
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inputNode.installTap(onBus: 0, |
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bufferSize: 1024, |
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format: inputFormat) { (buffer, time) in |
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bufferHandler(buffer) |
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} |
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} |
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if #available(iOS 13.0, *) { |
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try inputNode.setVoiceProcessingEnabled(true) |
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} |
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audioEngine.prepare() |
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print("音频引擎启动成功") |
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} |
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// 私有方法：启动麦克风捕获 |
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/** |
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* 启动麦克风捕获 |
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* 优化：复用已初始化的音频引擎，减少启动延迟 |
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* 安全地移除音频tap |
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* 避免在移除不存在的tap时出错 |
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*/ |
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private func removeTapSafely() { |
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guard let audioEngine = audioEngine else { return } |
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let inputNode = audioEngine.inputNode |
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// 尝试移除tap，如果没有tap也不会出错 |
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do { |
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inputNode.removeTap(onBus: 0) |
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print("成功移除音频tap") |
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} catch { |
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// 如果没有tap可移除，这是正常的 |
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print("移除tap时出现错误（可能没有tap存在）: \(error)") |
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} |
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} |
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private func runMicrophoneCapture() { |
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do { |
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// 【新增】首先配置音频会话 |
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try audioSession.setCategory( |
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.playAndRecord, |
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mode: .measurement, // 使用 measurement 模式获得最佳录音质量 |
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options: [.allowBluetooth, .defaultToSpeaker] |
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) |
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// 【新增】请求麦克风权限（如果尚未授权） |
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if audioSession.recordPermission != .granted { |
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audioSession.requestRecordPermission { granted in |
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if !granted { |
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print("麦克风权限被拒绝") |
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} |
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} |
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} |
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// 【新增】激活音频会话（在配置音频引擎之前） |
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try audioSession.setActive(true, options: [.notifyOthersOnDeactivation]) |
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print("🎤 开始配置麦克风捕获") |
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// 检查音频引擎是否已初始化，避免重复创建 |
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if audioEngine == nil { |
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audioEngine = AVAudioEngine() |
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print("🔧 创建新的音频引擎") |
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} |
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// 如果音频引擎正在运行，先停止 |
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if audioEngine?.isRunning == true { |
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audioEngine?.stop() |
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print("⏹️ 停止现有音频引擎") |
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} |
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// 获取音频输入节点（麦克风） |
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guard let inputNode = audioEngine?.inputNode else { |
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throw NSError(domain: "AudioSetup", code: 1, userInfo: [NSLocalizedDescriptionKey: "无法获取音频输入节点"]) |
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} |
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// 移除之前的音频处理块，避免重复添加 |
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inputNode.removeTap(onBus: 0) |
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// 获取硬件支持的原始音频格式 |
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let hardwareFormat = inputNode.inputFormat(forBus: 0) |
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// iOS 13+ 启用语音处理 |
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if #available(iOS 13.0, *) { |
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try inputNode.setVoiceProcessingEnabled(true) |
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} |
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// 检查目标音频格式和转换器是否可用 |
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guard let targetFormat = audioFormat, // 外部定义的期望音频格式 |
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let converter = AVAudioConverter(from: hardwareFormat, to: targetFormat) else { |
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throw NSError(domain: "AudioSetup", code: 2) |
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} |
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// 在输入节点上安装录音回调 |
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inputNode.installTap(onBus: 0, |
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bufferSize: UInt32(bufferSize), // 每次回调的缓冲区大小 |
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format: hardwareFormat) { // 使用原始硬件格式 |
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[weak self] buffer, time in // 弱引用避免循环引用 |
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// 确保实例存在且正在写入状态 |
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guard let self = self, self._isWriting else { return } |
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// 创建目标格式的音频缓冲区 |
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let convertedBuffer = AVAudioPCMBuffer( |
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pcmFormat: targetFormat, |
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// 计算转换后的帧容量（考虑采样率差异） |
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frameCapacity: AVAudioFrameCount( |
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targetFormat.sampleRate * Double(buffer.frameLength) / buffer.format.sampleRate |
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) |
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)! |
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var error: NSError? |
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// 执行音频格式转换 |
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let status = converter.convert( |
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to: convertedBuffer, |
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error: &error, |
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withInputFrom: { inNumPackets, outStatus in |
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outStatus.pointee = .haveData // 标记有数据可用 |
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return buffer // 返回原始音频数据 |
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} |
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) |
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// 转换成功且无错误 |
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if status == .haveData, error == nil { |
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// 将音频缓冲区转换为二进制数据 |
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let data = self.audioBufferToData(convertedBuffer) |
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// 将数据放入写入队列（后续处理） |
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self.writeQueue.put(data) |
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} |
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} |
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// 激活音频会话（允许录音） |
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try audioSession.setActive(true, options: [.notifyOthersOnDeactivation]) |
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// try startCapture { buffer in |
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// // 处理实时音频数据 |
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// let channelData = buffer.floatChannelData?[0] |
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// let frameCount = buffer.frameLength |
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// print("麦克风启动: \(frameCount)") |
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// print("🎵 音频数据: 帧数=\(frameCount), 声道数据=\(channelData != nil ? "有效" : "无效")") |
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// self.writeQueue.put(self.audioBufferToData(buffer)) |
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// // 分析或传输数据... |
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// } |
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try audioEngine?.start() |
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print("✅ 麦克风捕获配置完成") |
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try audioEngine?.start() |
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} catch { |
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print("麦克风启动失败: \(error)") |
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// 【新增】添加详细错误处理 |
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@ -283,38 +307,7 @@ public class SimpleAudioReceiver: NSObject { |
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} |
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} |
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} |
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private func audioBufferToData(_ buffer: AVAudioPCMBuffer) -> Data { |
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let frameLength = Int(buffer.frameLength) |
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let channelCount = 1 |
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let dataLength = frameLength * channelCount * MemoryLayout<Int16>.size |
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// Handle 16-bit integer format |
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if let int16Data = buffer.int16ChannelData { |
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return Data( |
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bytes: int16Data.pointee, |
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count: dataLength |
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) |
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} |
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// Handle float format |
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else if let floatData = buffer.floatChannelData { |
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var int16Array = [Int16](repeating: 0, count: frameLength) |
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let floatBuffer = floatData.pointee |
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for i in 0..<frameLength { |
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let sample = floatBuffer[i] |
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let clamped = max(-1.0, min(sample, 1.0)) |
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let scaled = clamped * Float(Int16.max) |
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int16Array[i] = Int16(scaled) |
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} |
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return Data( |
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bytes: int16Array, |
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count: dataLength |
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) |
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} |
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return Data() // Fallback for unsupported formats |
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} |
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private func runExternalCapture() { |
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if audioSourceType == .external { |
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//pushAudioData(data: Data()) |
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@ -323,114 +316,168 @@ public class SimpleAudioReceiver: NSObject { |
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//audioEngine?.inputNode.removeTap(onBus: 0) |
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} |
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} |
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/** |
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* 继续麦克风捕获 |
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*/ |
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/** |
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* 继续麦克风捕获 |
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* 停止麦克风捕获 |
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* 安全地停止音频会话和音频引擎 |
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*/ |
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public func resumeRecord() { |
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guard _isWriting==false else { return } |
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_isWriting = true |
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// 启动录音引擎 |
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do { |
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print("resumeRecord") |
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try audioEngine?.start() |
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} catch { |
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os_log("Failed to start audio engine: %@", log: log, type: .error, error.localizedDescription) |
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} |
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} |
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public func stopMicrophoneCapture() { |
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guard _isWriting==true else { return } |
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_isWriting=false |
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audioEngine?.pause() |
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print("stopMicrophoneCapture") |
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guard _isWriting == true else { return } |
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_isWriting = false |
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// 先停止音频引擎 |
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audioEngine?.stop() |
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// 然后安全地移除 tap |
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removeTapSafely() |
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print("stopMicrophoneCapture") |
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} |
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/** |
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* 释放音频资源 |
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* 完全清理所有音频相关资源 |
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*/ |
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public func releaseAudioResources() { |
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print("释放了") |
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// 停止麦克风捕获 |
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stopMicrophoneCapture() |
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// 停止音频引擎 |
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audioEngine?.stop() |
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writeThread?.async { |
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// 关闭写入队列 |
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writeThread?.async { |
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self.writeQueue.close() |
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} |
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writeThread = nil |
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audioEngine?.inputNode.removeTap(onBus: 0) |
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isRunning=false |
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// 安全地移除 tap |
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removeTapSafely() |
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// 重置状态 |
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isRunning = false |
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audioEngine = nil |
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} |
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// 音频路由管理 |
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public enum AudioOutputRoute { |
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case speaker |
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case receiver |
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case bluetooth |
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// MARK: - 协议定义 |
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/** |
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* 将音频缓冲区转换为Data格式 |
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* 统一处理采样率转换和格式转换 |
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* @param buffer 音频缓冲区 |
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* @return 转换后的音频数据 |
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*/ |
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private func audioBufferToData(_ buffer: AVAudioPCMBuffer) -> Data { |
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guard let floatChannelData = buffer.floatChannelData else { |
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return Data() |
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} |
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public func setAudioOutputRoute(_ route: AudioOutputRoute) { |
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let frameLength = Int(buffer.frameLength) |
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let channelCount = Int(buffer.format.channelCount) |
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let inputSampleRate = buffer.format.sampleRate |
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let targetSampleRate: Double = 16000 |
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// 统一处理：只使用第一个声道（单声道），确保一致性 |
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let firstChannelData = floatChannelData[0] |
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// 如果采样率不是16kHz，进行降采样 |
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if inputSampleRate != targetSampleRate { |
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let ratio = inputSampleRate / targetSampleRate |
|
|
|
let outputFrameCount = Int(Double(frameLength) / ratio) |
|
|
|
|
|
|
|
do { |
|
|
|
// |
|
|
|
if self._isWriting { |
|
|
|
print("当前正在识别") |
|
|
|
try audioEngine?.pause() |
|
|
|
// 先停用以避免冲突 |
|
|
|
try audioSession.setActive(false) |
|
|
|
|
|
|
|
} |
|
|
|
print("setAudioOutputRoutecurrent,route=\(route)") |
|
|
|
switch route { |
|
|
|
case .speaker: |
|
|
|
print("setAudioOutputRoutecurrent,speaker") |
|
|
|
// 使用扬声器时必须用videoChat模式 |
|
|
|
try audioSession.setCategory( |
|
|
|
.playAndRecord, |
|
|
|
mode: .videoChat, |
|
|
|
options: [.defaultToSpeaker] |
|
|
|
) |
|
|
|
try audioSession.overrideOutputAudioPort(.speaker) |
|
|
|
var outputData = Data() |
|
|
|
outputData.reserveCapacity(outputFrameCount * 2) // 16位 = 2字节 |
|
|
|
|
|
|
|
for outputIndex in 0..<outputFrameCount { |
|
|
|
let inputIndex = Int(Double(outputIndex) * ratio) |
|
|
|
if inputIndex < frameLength { |
|
|
|
let floatSample = firstChannelData[inputIndex] |
|
|
|
|
|
|
|
case .receiver: |
|
|
|
// 听筒模式使用voiceChat节省资源 |
|
|
|
try audioSession.setCategory( |
|
|
|
.playAndRecord, |
|
|
|
mode: .voiceChat, |
|
|
|
options: [.allowBluetooth] |
|
|
|
) |
|
|
|
try audioSession.overrideOutputAudioPort(.none) |
|
|
|
// 将Float32 (-1.0 to 1.0) 转换为Int16 (-32768 to 32767) |
|
|
|
let clampedSample = max(-1.0, min(1.0, floatSample)) |
|
|
|
let int16Sample = Int16(clampedSample * 32767.0) |
|
|
|
|
|
|
|
case .bluetooth: |
|
|
|
// 完整蓝牙设备支持 |
|
|
|
try audioSession.setCategory( |
|
|
|
.playAndRecord, |
|
|
|
mode: .voiceChat, |
|
|
|
options: [.allowBluetooth, .allowBluetoothA2DP] |
|
|
|
) |
|
|
|
try audioSession.overrideOutputAudioPort(.none) |
|
|
|
// 不需要override，系统自动路由 |
|
|
|
// 转换为小端字节序 |
|
|
|
withUnsafeBytes(of: int16Sample.littleEndian) { bytes in |
|
|
|
outputData.append(contentsOf: bytes) |
|
|
|
} |
|
|
|
} |
|
|
|
self.currentRoute = route |
|
|
|
if self._isWriting { |
|
|
|
|
|
|
|
// 重新激活 |
|
|
|
try audioSession.setActive(true, options: [.notifyOthersOnDeactivation]) |
|
|
|
|
|
|
|
try audioEngine?.start() |
|
|
|
// writeThread?.async { |
|
|
|
// self.writeQueue.close() |
|
|
|
// } |
|
|
|
} |
|
|
|
|
|
|
|
print("音频降采样: \(inputSampleRate)Hz -> \(targetSampleRate)Hz, 帧数: \(frameLength) -> \(outputFrameCount)") |
|
|
|
return outputData |
|
|
|
} else { |
|
|
|
// 采样率已经是16kHz，直接转换格式（只处理第一个声道） |
|
|
|
var data = Data() |
|
|
|
data.reserveCapacity(frameLength * 2) // 单声道，16位 |
|
|
|
|
|
|
|
for frame in 0..<frameLength { |
|
|
|
let floatSample = firstChannelData[frame] |
|
|
|
let clampedSample = max(-1.0, min(1.0, floatSample)) |
|
|
|
let int16Sample = Int16(clampedSample * 32767.0) |
|
|
|
|
|
|
|
withUnsafeBytes(of: int16Sample.littleEndian) { bytes in |
|
|
|
data.append(contentsOf: bytes) |
|
|
|
} |
|
|
|
} catch { |
|
|
|
print("路由切换失败: \(error)") |
|
|
|
} |
|
|
|
|
|
|
|
print("音频格式转换: \(inputSampleRate)Hz, 帧数: \(frameLength), 输出大小: \(data.count) 字节") |
|
|
|
return data |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
/** |
|
|
|
* 设置音频会话配置 |
|
|
|
* 确保音频会话正确配置用于录音 |
|
|
|
*/ |
|
|
|
private func setupAudioSession() throws { |
|
|
|
try audioSession.setCategory(.playAndRecord, mode: .default, options: [.defaultToSpeaker, .allowBluetooth]) |
|
|
|
try audioSession.setActive(true) |
|
|
|
|
|
|
|
// 设置首选的音频参数 |
|
|
|
try audioSession.setPreferredSampleRate(48000) |
|
|
|
try audioSession.setPreferredInputNumberOfChannels(1) |
|
|
|
|
|
|
|
print("音频会话配置成功: 采样率=\(audioSession.sampleRate)Hz, 输入声道=\(audioSession.inputNumberOfChannels)") |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/** |
|
|
|
* 继续麦克风捕获 |
|
|
|
*/ |
|
|
|
public func resumeRecord() { |
|
|
|
guard _isWriting == false else { return } |
|
|
|
_isWriting = true |
|
|
|
|
|
|
|
// 启动录音引擎 |
|
|
|
do { |
|
|
|
print("resumeRecord") |
|
|
|
|
|
|
|
// 确保音频引擎存在且已准备好 |
|
|
|
guard let audioEngine = audioEngine else { |
|
|
|
print("Audio engine not initialized") |
|
|
|
return |
|
|
|
} |
|
|
|
|
|
|
|
if !audioEngine.isRunning { |
|
|
|
try audioEngine.start() |
|
|
|
} |
|
|
|
} catch { |
|
|
|
os_log("Failed to start audio engine: %@", log: log, type: .error, error.localizedDescription) |
|
|
|
_isWriting = false |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
// 音频路由管理 |
|
|
|
public enum AudioOutputRoute { |
|
|
|
case speaker |
|
|
|
case receiver |
|
|
|
case bluetooth |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/** |
|
|
|
* 音频数据回调接口 |
|
|
|
@ -526,5 +573,3 @@ private class LinkedBlockingQueue<T> { |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
// MARK: - 协议定义 |
|
|
|
|
|
|
|
|
