iOS输入麦克风输出蓝牙设备

概述我正在尝试从Mic获取输入并使用audioRouteOverride将其输出到我的蓝牙设备.但没有运气. iphone麦克风输出仍然是 iphone内置扬声器.我期待kAudioSessionOutputRoute_BluetoothA2DP是这里的关键. 但它没有按预期工作. 以下是我使用的代码： - (id) init { self = [super init]; OSSta 我正在尝试从Mic获取输入并使用audioRouteOverrIDe将其输出到我的蓝牙设备.但没有运气. iphone麦克风输出仍然是 iphone内置扬声器.我期待kAudioSessionOutputRoute_BluetoothA2DP是这里的关键.
但它没有按预期工作.

以下是我使用的代码：

- (ID) init {    self = [super init];    Osstatus status;    // Describe audio component    AudioComponentDescription desc;    desc.componentType = kAudioUnitType_Output;    desc.componentSubType = kAudioUnitSubType_RemoteIO;    desc.componentFlags = 0;    desc.componentFlagsMask = 0;    desc.componentManufacturer = kAudioUnitManufacturer_Apple;    // Get component    AudioComponent inputComponent = AudioComponentFindNext(NulL,&desc);    // Get audio units    status = AudioComponentInstanceNew(inputComponent,&audioUnit);    checkStatus(status);    // Enable IO for recording    UInt32 flag = 1;    status = AudioUnitSetProperty(audioUnit,kAudioOutputUnitProperty_EnableIO,kAudioUnitScope_input,kinputBus,&flag,sizeof(flag));    checkStatus(status);    // Enable IO for playback    status = AudioUnitSetProperty(audioUnit,kAudioUnitScope_Output,kOutputBus,sizeof(flag));    checkStatus(status);    // Describe format    AudioStreamBasicDescription audioFormat;    audioFormat.mSampleRate         = 44100.00;    audioFormat.mFormatID           = kAudioFormatlinearPCM;    audioFormat.mFormatFlags        = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;    audioFormat.mFramesPerPacket    = 1;    audioFormat.mChannelsPerFrame   = 1;    audioFormat.mBitsPerChannel     = 16;    audioFormat.mBytesPerPacket     = 2;    audioFormat.mBytesPerFrame      = 2;    // Apply format    status = AudioUnitSetProperty(audioUnit,kAudioUnitProperty_StreamFormat,&audioFormat,sizeof(audioFormat));    checkStatus(status);    status = AudioUnitSetProperty(audioUnit,sizeof(audioFormat));    checkStatus(status);    // Set input callback    AURenderCallbackStruct callbackStruct;    callbackStruct.inputProc = recordingCallback;    callbackStruct.inputProcRefCon = self;    status = AudioUnitSetProperty(audioUnit,kAudioOutputUnitProperty_SetinputCallback,kAudioUnitScope_Global,&callbackStruct,sizeof(callbackStruct));    checkStatus(status);    // Set output callback    callbackStruct.inputProc = playbackCallback;    callbackStruct.inputProcRefCon = self;    status = AudioUnitSetProperty(audioUnit,kAudioUnitProperty_SetRenderCallback,sizeof(callbackStruct));    checkStatus(status);    // disable buffer allocation for the recorder (optional - do this if we want to pass in our own)    flag = 0;    status = AudioUnitSetProperty(audioUnit,kAudioUnitProperty_ShouldAllocateBuffer,sizeof(flag));    NSLog(@"%ld",(long)status);    // Allocate our own buffers (1 channel,16 bits per sample,thus 16 bits per frame,thus 2 bytes per frame).    // Practice learns the buffers used contain 512 frames,if this changes it will be fixed in processAudio.    tempBuffer.mNumberChannels = 1;    tempBuffer.mDataByteSize = 512 * 2;    tempBuffer.mData = malloc( 512 * 2 );    UInt32 audiocategory = kAudioSessioncategory_PlayAndRecord;    status = AudioSessionSetProperty(kAudioSessionProperty_Audiocategory,sizeof(audiocategory),&audiocategory);    NSLog(@"%ld",(long)status);    UInt32 allowMixing = true;    status = AudioSessionSetProperty(kAudioSessionProperty_OverrIDecategoryMixWithOthers,sizeof(allowMixing),&allowMixing);    UInt32 audioRouteOverrIDe = kAudioSessionOutputRoute_BluetoothA2DP; //kAudioSessionOverrIDeAudioRoute_Speaker;    AudioSessionSetProperty (kAudioSessionProperty_OverrIDeAudioRoute,sizeof (audioRouteOverrIDe),&audioRouteOverrIDe);    status = AudioUnitinitialize(audioUnit);    checkStatus(status);    return self;}

解决方法 ust用Apple确认了.这是不可能实现的.蓝牙总是成对出现麦克风和麦克风.扬声器在一起;) 总结

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