virtual IAudioFormat* GetAudioFormat()
{
if (!Singleton)
{
LoadVorbisLibraries();
Singleton = new FAudioFormatOgg();
}
return Singleton;
}
/**
* Initializes the audio device and creates sources.
*
* @return true if initialization was successful, false otherwise
*/
bool FCoreAudioDevice::InitializeHardware()
{
if (IsRunningDedicatedServer())
{
return false;
}
// Load ogg and vorbis dlls if they haven't been loaded yet
LoadVorbisLibraries();
InverseTransform = FMatrix::Identity;
for( SInt32 Index = 0; Index < MAX_AUDIOCHANNELS; ++Index )
{
Mixer3DInputStatus[ Index ] = false;
}
for( SInt32 Index = 0; Index < MAX_MULTICHANNEL_AUDIOCHANNELS; ++Index )
{
MatrixMixerInputStatus[ Index ] = false;
}
// Make sure the output audio device exists
AudioDeviceID HALDevice;
UInt32 Size = sizeof( AudioDeviceID );
AudioObjectPropertyAddress PropertyAddress;
PropertyAddress.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
PropertyAddress.mScope = kAudioObjectPropertyScopeGlobal;
PropertyAddress.mElement = kAudioObjectPropertyElementMaster;
OSStatus Status = AudioObjectGetPropertyData( kAudioObjectSystemObject, &PropertyAddress, 0, NULL, &Size, &HALDevice );
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "No audio devices found!" ) );
return false;
}
Status = NewAUGraph( &AudioUnitGraph );
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to create audio unit graph!" ) );
return false;
}
AudioComponentDescription Desc;
Desc.componentFlags = 0;
Desc.componentFlagsMask = 0;
Desc.componentType = kAudioUnitType_Output;
Desc.componentSubType = kAudioUnitSubType_DefaultOutput;
Desc.componentManufacturer = kAudioUnitManufacturer_Apple;
Status = AUGraphAddNode( AudioUnitGraph, &Desc, &OutputNode );
if( Status == noErr )
{
Status = AUGraphOpen( AudioUnitGraph );
if( Status == noErr )
{
Status = AUGraphNodeInfo( AudioUnitGraph, OutputNode, NULL, &OutputUnit );
if( Status == noErr )
{
Status = AudioUnitInitialize( OutputUnit );
}
}
}
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to initialize audio output unit!" ) );
Teardown();
return false;
}
Desc.componentFlags = 0;
Desc.componentFlagsMask = 0;
Desc.componentType = kAudioUnitType_Mixer;
Desc.componentSubType = kAudioUnitSubType_3DMixer;
Desc.componentManufacturer = kAudioUnitManufacturer_Apple;
Status = AUGraphAddNode( AudioUnitGraph, &Desc, &Mixer3DNode );
if( Status == noErr )
{
Status = AUGraphNodeInfo( AudioUnitGraph, Mixer3DNode, NULL, &Mixer3DUnit );
if( Status == noErr )
{
Status = AudioUnitInitialize( Mixer3DUnit );
}
}
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to initialize audio 3D mixer unit!" ) );
Teardown();
return false;
}
Desc.componentFlags = 0;
Desc.componentFlagsMask = 0;
Desc.componentType = kAudioUnitType_Mixer;
Desc.componentSubType = kAudioUnitSubType_MatrixMixer;
Desc.componentManufacturer = kAudioUnitManufacturer_Apple;
Status = AUGraphAddNode( AudioUnitGraph, &Desc, &MatrixMixerNode );
if( Status == noErr )
{
Status = AUGraphNodeInfo( AudioUnitGraph, MatrixMixerNode, NULL, &MatrixMixerUnit );
// Set number of buses for input
uint32 NumBuses = MAX_MULTICHANNEL_AUDIOCHANNELS;
Size = sizeof( NumBuses );
Status = AudioUnitSetProperty( MatrixMixerUnit, kAudioUnitProperty_ElementCount, kAudioUnitScope_Input, 0, &NumBuses, Size );
if( Status == noErr )
{
// Set number fo buses for output
NumBuses = 1;
Status = AudioUnitSetProperty( MatrixMixerUnit, kAudioUnitProperty_ElementCount, kAudioUnitScope_Output, 0, &NumBuses, Size );
}
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to setup audio matrix mixer unit!" ) );
Teardown();
return false;
}
// Get default input stream format
Size = sizeof( AudioStreamBasicDescription );
Status = AudioUnitGetProperty( MatrixMixerUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &MatrixMixerInputFormat, &Size );
// Set output stream format to SPEAKER_COUT (6 channels)
MatrixMixerInputFormat.mChannelsPerFrame = SPEAKER_COUNT;
MatrixMixerInputFormat.mFramesPerPacket = 1;
MatrixMixerInputFormat.mBytesPerPacket = MatrixMixerInputFormat.mBytesPerFrame;
MatrixMixerInputFormat.mFormatFlags |= kAudioFormatFlagIsNonInterleaved;
for( int32 Index = 0; Index < MAX_MULTICHANNEL_AUDIOCHANNELS; Index++ )
{
Status = AudioUnitSetProperty( MatrixMixerUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, Index, &MatrixMixerInputFormat, Size );
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to setup audio matrix mixer unit input format!" ) );
Teardown();
return false;
}
}
// Set output stream format
Size = sizeof( AudioStreamBasicDescription );
Status = AudioUnitGetProperty( MatrixMixerUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &MatrixMixerOutputFormat, &Size );
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to setup audio matrix mixer unit output format!" ) );
Teardown();
return false;
}
// Initialize Matrix Mixer unit
Status = AudioUnitInitialize( MatrixMixerUnit );
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to initialize audio matrix mixer unit!" ) );
Teardown();
return false;
}
// Enable Output
AudioUnitSetParameter( MatrixMixerUnit, kMatrixMixerParam_Enable, kAudioUnitScope_Output, 0, 1.0, 0 );
// Set Output volume
AudioUnitSetParameter( MatrixMixerUnit, kMatrixMixerParam_Volume, kAudioUnitScope_Output, 0, 1.0, 0 );
AudioUnitSetParameter( MatrixMixerUnit, kMatrixMixerParam_Volume, kAudioUnitScope_Output, 1, 1.0, 0 );
// Set Master volume
AudioUnitSetParameter( MatrixMixerUnit, kMatrixMixerParam_Volume, kAudioUnitScope_Global, 0xFFFFFFFF, 1.0, 0 );
}
Size = sizeof( AudioStreamBasicDescription );
Status = AudioUnitGetProperty( Mixer3DUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &Mixer3DFormat, &Size );
if( Status == noErr )
{
// Connect 3D Mixer to Output node
Status = AUGraphConnectNodeInput( AudioUnitGraph, Mixer3DNode, 0, OutputNode, 0 );
}
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to start audio graph!" ) );
Teardown();
return false;
}
// Connect Matrix Mixer to 3D Mixer node
Status = AUGraphConnectNodeInput( AudioUnitGraph, MatrixMixerNode, 0, Mixer3DNode, 0 );
Mixer3DInputStatus[0] = true;
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to start audio graph!" ) );
Teardown();
return false;
}
Status = AUGraphInitialize( AudioUnitGraph );
if( Status == noErr )
{
Status = AUGraphStart( AudioUnitGraph );
}
if( Status != noErr )
{
UE_LOG(LogInit, Log, TEXT( "Failed to start audio graph!" ) );
Teardown();
return false;
}
return true;
}
