56 lines
1.5 KiB
Objective-C
56 lines
1.5 KiB
Objective-C
//
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// AudioCaptureManager.h
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// keyBoard
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//
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// Created by Mac on 2026/1/15.
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//
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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/// 音频采集参数（固定值，便于端到端稳定）
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/// Sample Rate: 16000 Hz
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/// Channels: 1 (Mono)
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/// Format: PCM Int16 (pcm_s16le)
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/// Frame Duration: 20ms (320 samples, 640 bytes)
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extern const double kAudioSampleRate; // 16000.0
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extern const int kAudioChannels; // 1
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extern const NSUInteger kAudioFrameDuration; // 20 (ms)
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extern const NSUInteger kAudioFrameSamples; // 320 (16000 * 0.02)
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extern const NSUInteger kAudioFrameBytes; // 640 (320 * 2)
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/// 音频采集管理器代理
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@protocol AudioCaptureManagerDelegate <NSObject>
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@required
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/// 输出 PCM 帧（20ms / 640 bytes）
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/// @param pcmFrame 640 字节的 PCM Int16 数据
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- (void)audioCaptureManagerDidOutputPCMFrame:(NSData *)pcmFrame;
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@optional
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/// 更新 RMS 值（用于波形显示）
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/// @param rms 当前音量的 RMS 值 (0.0 - 1.0)
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- (void)audioCaptureManagerDidUpdateRMS:(float)rms;
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@end
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/// 音频采集管理器
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/// 使用 AVAudioEngine 采集麦克风音频，输出 20ms PCM 帧
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@interface AudioCaptureManager : NSObject
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@property(nonatomic, weak) id<AudioCaptureManagerDelegate> delegate;
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/// 是否正在采集
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@property(nonatomic, assign, readonly, getter=isCapturing) BOOL capturing;
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/// 开始采集
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/// @param error 错误信息
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/// @return 是否启动成功
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- (BOOL)startCapture:(NSError **)error;
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/// 停止采集
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- (void)stopCapture;
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@end
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NS_ASSUME_NONNULL_END
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