以下のコードを使用して、オーディオコンポーネントを初期化します。
-(void) startListeningWithCoreAudio
{
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error:&error];
if (error)
NSLog(@"error setting up audio session: %@", [error localizedDescription]);
[[AVAudioSession sharedInstance] setDelegate:self];
OSStatus status = AudioSessionSetActive(YES);
checkStatus(status);
// Find the apple mic
AudioComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_VoiceProcessingIO;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
AudioComponent inputComponent = AudioComponentFindNext( NULL, &desc );
status = AudioComponentInstanceNew( inputComponent, &kAudioUnit );
checkStatus( status );
// enable mic output as our input
UInt32 flag = 1;
status = AudioUnitSetProperty( kAudioUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, kInputBus, &flag, sizeof(flag) );
checkStatus(status);
// Define mic output audio format
AudioStreamBasicDescription audioFormat;
audioFormat.mSampleRate = 16000.0;
audioFormat.mFormatID = kAudioFormatLinearPCM;
audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
audioFormat.mFramesPerPacket = 1;
audioFormat.mChannelsPerFrame = 1;
audioFormat.mBitsPerChannel = 16;
audioFormat.mBytesPerPacket = 2;
audioFormat.mBytesPerFrame = 2;
status = AudioUnitSetProperty( kAudioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, kInputBus, &audioFormat, sizeof(audioFormat) );
checkStatus(status);
// Define our callback methods
AURenderCallbackStruct callbackStruct;
callbackStruct.inputProc = recordingCallback;
callbackStruct.inputProcRefCon = self;
status = AudioUnitSetProperty( kAudioUnit, kAudioOutputUnitProperty_SetInputCallback, kAudioUnitScope_Global, kInputBus, &callbackStruct, sizeof(callbackStruct) );
checkStatus(status);
// By pass voice processing
UInt32 audiobypassProcessing = [[NSUserDefaults standardUserDefaults] boolForKey:VOICE_BY_PASS_PROCESSING];
status = AudioUnitSetProperty(kAudioUnit, kAUVoiceIOProperty_BypassVoiceProcessing,
kAudioUnitScope_Global, kInputBus, &audiobypassProcessing, sizeof(audiobypassProcessing));
checkStatus(status);
// Automatic Gain Control
UInt32 audioAGC = [[NSUserDefaults standardUserDefaults]boolForKey:VOICE_AGC];
status = AudioUnitSetProperty(kAudioUnit, kAUVoiceIOProperty_VoiceProcessingEnableAGC,
kAudioUnitScope_Global, kInputBus, &audioAGC, sizeof(audioAGC));
checkStatus(status);
//Non Audio Voice Ducking
UInt32 audioDucking = [[NSUserDefaults standardUserDefaults]boolForKey:VOICE_DUCKING];
status = AudioUnitSetProperty(kAudioUnit, kAUVoiceIOProperty_DuckNonVoiceAudio,
kAudioUnitScope_Global, kInputBus, &audioDucking, sizeof(audioDucking));
checkStatus(status);
//Audio Quality
UInt32 quality = [[NSUserDefaults standardUserDefaults]integerForKey:VOICE_QUALITY];
status = AudioUnitSetProperty(kAudioUnit, kAUVoiceIOProperty_VoiceProcessingQuality,
kAudioUnitScope_Global, kInputBus, &quality, sizeof(quality));
checkStatus(status);
status = AudioUnitInitialize(kAudioUnit);
checkStatus(status);
status = AudioOutputUnitStart( kAudioUnit );
checkStatus(status);
UInt32 audioRoute = (UInt32)kAudioSessionOverrideAudioRoute_Speaker;
status = AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof (audioRoute), &audioRoute);
checkStatus(status);
}
-(void) stopListeningWithCoreAudio
{
OSStatus status = AudioUnitUninitialize( kAudioUnit );
checkStatus(status);
status = AudioOutputUnitStop( kAudioUnit );
checkStatus( status );
// if(kAudioUnit)
// {
// status = AudioComponentInstanceDispose(kAudioUnit);
// checkStatus(status);
// kAudioUnit = nil;
// }
status = AudioSessionSetActive(NO);
checkStatus(status);
NSError *error = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategorySoloAmbient error:&error];
if (error)
NSLog(@"error setting up audio session: %@", [error localizedDescription]);
}
初めて正常に動作します。つまりstartListeningWithCoreAudio
、ボタンが押されたイベントによって呼び出されます。オーディオをうまく録音/処理できます。stopListeningWithCoreAudio
他のイベントでは、オーディオの録音/処理を停止するように呼びかけています。
もう一度関数を呼び出そうとすると、問題が発生しますstartListeningWithCoreAudio
。2つの関数に対してエラーをスローします。AudioUnitInitialize
からAudioOutputUnitStart
呼び出されstartListeningWithCoreAudio
ます。
誰かが私に何が問題なのか助けてもらえますか?