/******************************************************************************\
* Copyright (c) 2004-2011
*
* Author(s):
* Volker Fischer
*
******************************************************************************
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
\******************************************************************************/
#include "sound.h"
/* Implementation *************************************************************/
void CSound::OpenCoreAudio()
{
UInt32 size;
ComponentResult err;
// open the default unit
ComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_HALOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
Component comp = FindNextComponent ( NULL, &desc );
if ( comp == NULL )
{
throw CGenErr ( tr ( "No CoreAudio next component found" ) );
}
if ( OpenAComponent ( comp, &audioInputUnit ) )
{
throw CGenErr ( tr ( "CoreAudio creating input component instance failed" ) );
}
if ( OpenAComponent ( comp, &audioOutputUnit ) )
{
throw CGenErr ( tr ( "CoreAudio creating output component instance failed" ) );
}
// we enable input and disable output for input component
UInt32 enableIO = 1;
err = AudioUnitSetProperty ( audioInputUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Input,
1, // input element
&enableIO,
sizeof ( enableIO ) );
enableIO = 0;
err = AudioUnitSetProperty ( audioInputUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output,
0, // output element
&enableIO,
sizeof ( enableIO ) );
// set input device
size = sizeof ( AudioDeviceID );
if ( AudioHardwareGetProperty ( kAudioHardwarePropertyDefaultInputDevice,
&size,
&audioInputDevice ) )
{
throw CGenErr ( tr ( "CoreAudio input AudioHardwareGetProperty call failed" ) );
}
if ( AudioUnitSetProperty ( audioInputUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
1,
&audioInputDevice,
sizeof ( audioInputDevice ) ) )
{
throw CGenErr ( tr ( "CoreAudio input AudioUnitSetProperty call failed" ) );
}
// set up a callback function for new input data
AURenderCallbackStruct input;
input.inputProc = processInput;
input.inputProcRefCon = this;
if ( AudioUnitSetProperty ( audioInputUnit,
kAudioOutputUnitProperty_SetInputCallback,
kAudioUnitScope_Global,
0,
&input,
sizeof ( input ) ) )
{
throw CGenErr ( tr ( "CoreAudio audio unit set property failed" ) );
}
// set output device
size = sizeof ( AudioDeviceID );
if ( AudioHardwareGetProperty ( kAudioHardwarePropertyDefaultOutputDevice,
&size,
&audioOutputDevice ) )
{
throw CGenErr ( tr ( "CoreAudio output AudioHardwareGetProperty call failed" ) );
}
if ( AudioUnitSetProperty ( audioOutputUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
0,
&audioOutputDevice,
sizeof ( audioOutputDevice ) ) )
{
throw CGenErr ( tr ( "CoreAudio output AudioUnitSetProperty call failed" ) );
}
// set up a callback function for new output data
AURenderCallbackStruct output;
output.inputProc = processOutput;
output.inputProcRefCon = this;
if ( AudioUnitSetProperty ( audioOutputUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Global,
0,
&output,
sizeof ( output ) ) )
{
throw CGenErr ( tr ( "CoreAudio audio unit set property failed" ) );
}
// set up stream format
AudioStreamBasicDescription streamFormat;
streamFormat.mSampleRate = SYSTEM_SAMPLE_RATE_HZ;
streamFormat.mFormatID = kAudioFormatLinearPCM;
streamFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger;
streamFormat.mFramesPerPacket = 1;
streamFormat.mBytesPerFrame = 4;
streamFormat.mBytesPerPacket = 4;
streamFormat.mChannelsPerFrame = 2; // stereo
streamFormat.mBitsPerChannel = 16;
// our output
if ( AudioUnitSetProperty ( audioOutputUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&streamFormat,
sizeof(streamFormat) ) )
{
throw CGenErr ( tr ( "CoreAudio stream format set property failed" ) );
}
// our input
if ( AudioUnitSetProperty ( audioInputUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Output,
1,
&streamFormat,
sizeof(streamFormat) ) )
{
throw CGenErr ( tr ( "CoreAudio stream format set property failed" ) );
}
// check input device sample rate
size = sizeof ( Float64 );
Float64 inputSampleRate;
AudioUnitGetProperty ( audioInputUnit,
kAudioUnitProperty_SampleRate,
kAudioUnitScope_Input,
1,
&inputSampleRate,
&size );
if ( static_cast<int> ( inputSampleRate ) != SYSTEM_SAMPLE_RATE_HZ )
{
throw CGenErr ( QString ( tr ( "Current system audio input device sample "
"rate of %1 Hz is not supported. Please open the Audio-MIDI-Setup in "
"Applications->Utilities and try to set a sample rate of %2 Hz." ) ).arg (
static_cast<int> ( inputSampleRate ) ).arg ( SYSTEM_SAMPLE_RATE_HZ ) );
}
// check output device sample rate
size = sizeof ( Float64 );
Float64 outputSampleRate;
AudioUnitGetProperty ( audioOutputUnit,
kAudioUnitProperty_SampleRate,
kAudioUnitScope_Output,
0,
&outputSampleRate,
&size );
if ( static_cast<int> ( outputSampleRate ) != SYSTEM_SAMPLE_RATE_HZ )
{
throw CGenErr ( QString ( tr ( "Current system audio output device sample "
"rate of %1 Hz is not supported. Please open the Audio-MIDI-Setup in "
"Applications->Utilities and try to set a sample rate of %2 Hz." ) ).arg (
static_cast<int> ( outputSampleRate ) ).arg ( SYSTEM_SAMPLE_RATE_HZ ) );
}
// allocate memory for buffer struct
pBufferList = (AudioBufferList*) malloc ( offsetof ( AudioBufferList,
mBuffers[0] ) + sizeof ( AudioBuffer ) );
}
void CSound::CloseCoreAudio()
{
// clean up "gOutputUnit"
AudioUnitUninitialize ( audioInputUnit );
AudioUnitUninitialize ( audioOutputUnit );
CloseComponent ( audioInputUnit );
CloseComponent ( audioOutputUnit );
}
void CSound::Start()
{
// start the rendering
AudioOutputUnitStart ( audioInputUnit );
AudioOutputUnitStart ( audioOutputUnit );
// call base class
CSoundBase::Start();
}
void CSound::Stop()
{
// stop the audio stream
AudioOutputUnitStop ( audioInputUnit );
AudioOutputUnitStop ( audioOutputUnit );
// call base class
CSoundBase::Stop();
}
int CSound::Init ( const int iNewPrefMonoBufferSize )
{
UInt32 iActualMonoBufferSize;
// Error message string: in case buffer sizes on input and output cannot be set to the same value
const QString strErrBufSize = tr ( "The buffer sizes of the current "
"input and output audio device cannot be set to a common value. Please "
"choose other input/output audio devices in your system settings." );
// try to set input buffer size
iActualMonoBufferSize =
SetBufferSize ( audioInputDevice, true, iNewPrefMonoBufferSize );
if ( iActualMonoBufferSize != static_cast<UInt32> ( iNewPrefMonoBufferSize ) )
{
// try to set the input buffer size to the output so that we
// have a matching pair
if ( SetBufferSize ( audioOutputDevice, false, iActualMonoBufferSize ) !=
iActualMonoBufferSize )
{
throw CGenErr ( strErrBufSize );
}
}
else
{
// try to set output buffer size
if ( SetBufferSize ( audioOutputDevice, false, iNewPrefMonoBufferSize ) !=
static_cast<UInt32> ( iNewPrefMonoBufferSize ) )
{
throw CGenErr ( strErrBufSize );
}
}
// store buffer size
iCoreAudioBufferSizeMono = iActualMonoBufferSize;
// init base class
CSoundBase::Init ( iCoreAudioBufferSizeMono );
// set internal buffer size value and calculate stereo buffer size
iCoreAudioBufferSizeStero = 2 * iCoreAudioBufferSizeMono;
// create memory for intermediate audio buffer
vecsTmpAudioSndCrdStereo.Init ( iCoreAudioBufferSizeStero );
// fill audio unit buffer struct
pBufferList->mNumberBuffers = 1;
pBufferList->mBuffers[0].mNumberChannels = 2; // stereo
pBufferList->mBuffers[0].mDataByteSize = iCoreAudioBufferSizeMono * 4; // 2 bytes, 2 channels
pBufferList->mBuffers[0].mData = &vecsTmpAudioSndCrdStereo[0];
// initialize unit
if ( AudioUnitInitialize ( audioInputUnit ) )
{
throw CGenErr ( tr ( "Initialization of CoreAudio failed" ) );
}
if ( AudioUnitInitialize ( audioOutputUnit ) )
{
throw CGenErr ( tr ( "Initialization of CoreAudio failed" ) );
}
return iCoreAudioBufferSizeMono;
}
UInt32 CSound::SetBufferSize ( AudioDeviceID& audioDeviceID,
const bool bIsInput,
UInt32 iPrefBufferSize )
{
// first set the value
UInt32 iSizeBufValue = sizeof ( UInt32 );
AudioDeviceSetProperty ( audioDeviceID,
NULL,
0,
bIsInput,
kAudioDevicePropertyBufferFrameSize,
iSizeBufValue,
&iPrefBufferSize );
// read back which value is actually used
UInt32 iActualMonoBufferSize;
AudioDeviceGetProperty ( audioDeviceID,
0,
bIsInput,
kAudioDevicePropertyBufferFrameSize,
&iSizeBufValue,
&iActualMonoBufferSize );
return iActualMonoBufferSize;
}
OSStatus CSound::processInput ( void* inRefCon,
AudioUnitRenderActionFlags* ioActionFlags,
const AudioTimeStamp* inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList* )
{
CSound* pSound = reinterpret_cast<CSound*> ( inRefCon );
QMutexLocker locker ( &pSound->Mutex );
// get the new audio data
AudioUnitRender ( pSound->audioInputUnit,
ioActionFlags,
inTimeStamp,
inBusNumber,
inNumberFrames,
pSound->pBufferList );
// call processing callback function
pSound->ProcessCallback ( pSound->vecsTmpAudioSndCrdStereo );
return noErr;
}
OSStatus CSound::processOutput ( void* inRefCon,
AudioUnitRenderActionFlags*,
const AudioTimeStamp*,
UInt32,
UInt32,
AudioBufferList* ioData )
{
CSound* pSound = reinterpret_cast<CSound*> ( inRefCon );
QMutexLocker locker ( &pSound->Mutex );
memcpy ( ioData->mBuffers[0].mData,
&pSound->vecsTmpAudioSndCrdStereo[0],
pSound->pBufferList->mBuffers[0].mDataByteSize);
return noErr;
}