macos - programa - Cómo configurar para grabar y reproducir audio en Mac. Aplicación VOIP en Mac

nero para mac

Question

Quiero grabar y reproducir audio en Mac. Ahora, tengo algunos problemas con la configuración de Input / Output / ChannelFormat ... Les mostré algunos códigos que intento a continuación.

// Setup audio device
- (OSStatus) setupAudioDevice { // It''s oks
AudioComponentDescription desc;
AudioComponent comp;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_VoiceProcessingIO; // This type support for both iOS and Mac
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
comp = AudioComponentFindNext(NULL, &desc);
if (comp == NULL)
{
return -1;
}
OSStatus err = AudioComponentInstanceNew(comp, &audioUnit);
checkStatus(err);
return err;
}
//Enable IO
//https://developer.apple.com/library/prerelease/content/technotes/tn2091/_index.html
- (OSStatus) setupEnableIO { // It''s ok
UInt32 enableIO;
//When using AudioUnitSetProperty the 4th parameter in the method
//refer to an AudioUnitElement. When using an AudioOutputUnit
//the input element will be ''1'' and the output element will be ''0''.
enableIO = 1;
OSStatus err = AudioUnitSetProperty(audioUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Input,
kInputBus, // input element
&enableIO,
sizeof(enableIO));
checkStatus(err);
enableIO = 0;
err = AudioUnitSetProperty(audioUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output,
kOutputBus, //output element
&enableIO,
sizeof(enableIO));
checkStatus(err);
return err;
}
// Setup Microphone
- (OSStatus) setupMicInput { // It''s ok
AudioObjectPropertyAddress addr;
UInt32 size = sizeof(AudioDeviceID);
AudioDeviceID deviceID = 0;
addr.mSelector = kAudioHardwarePropertyDefaultInputDevice;
addr.mScope = kAudioObjectPropertyScopeGlobal;
addr.mElement = kAudioObjectPropertyElementMaster;
OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &addr, 0, NULL, &size, &deviceID);
checkStatus(err);
if (err == noErr) {
err = AudioUnitSetProperty(audioUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &deviceID, size);
}
checkStatus(err);
int m_valueCount = deviceID / sizeof(AudioValueRange) ;
NSLog(@"Available %d Sample Rates/n",m_valueCount);
NSLog(@"DeviceName: %@",[self deviceName:deviceID]);
NSLog(@"BufferSize: %d",[self bufferSize:deviceID]);
return err;
}
// Setup Input format
- (OSStatus)setupInputFormat {
AudioStreamBasicDescription audioFormat;// = [EZAudioUtilities monoFloatFormatWithSampleRate:SampleRate]
audioFormat.mSampleRate = SampleRate;
audioFormat.mFormatID = kAudioFormatLinearPCM;
audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
audioFormat.mFramesPerPacket = 1;
audioFormat.mChannelsPerFrame = 1;
audioFormat.mBitsPerChannel = 8 * sizeof(UInt32);
audioFormat.mBytesPerPacket = sizeof(UInt32);
audioFormat.mBytesPerFrame = sizeof(UInt32);
UInt32 size = sizeof(AudioStreamBasicDescription);
// Apply format
OSStatus err = AudioUnitSetProperty(audioUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&audioFormat,
size);
checkStatus(err);
err = AudioUnitSetProperty(audioUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Output,
1,
&audioFormat,
size);
checkStatus(err);
return err;
}
//Setup Input Callback
- (OSStatus)setupInputCallback {
AURenderCallbackStruct callbackStruct;
callbackStruct.inputProc = recordingCallback;
callbackStruct.inputProcRefCon = (__bridge void * _Nullable)(self);
UInt32 size = sizeof(AURenderCallbackStruct);
OSStatus err = AudioUnitSetProperty(audioUnit,
kAudioOutputUnitProperty_SetInputCallback,
kAudioUnitScope_Global,
0,
&callbackStruct,
size);
checkStatus(err);
return err;
}
//Setup Output Playback
- (OSStatus)setupRenderPlayback {
// Set output callback
AURenderCallbackStruct callbackStruct;
callbackStruct.inputProc = playbackCallback;
callbackStruct.inputProcRefCon = (__bridge void * _Nullable)(self);
UInt32 size = sizeof(AURenderCallbackStruct);
OSStatus err = AudioUnitSetProperty(audioUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input,
1,
&callbackStruct,
size);
checkStatus(err);
return err;
}

Intento seguir esta sugerencia . Pero todavía no funciona. Aquí está mi proyecto de ejemplo

Answer 1

Creo que deberías comprobar que kAudioFormatLinearPCM está firmado16 o firmado32, le o ser entonces

audioFormat.mBitsPerChannel = 8 * sizeof(UInt32);
audioFormat.mBytesPerPacket = sizeof(UInt32);
audioFormat.mBytesPerFrame = sizeof(UInt32);

debe ser cambiado en consecuencia