IOAudioPort *IOAudioPort::withAttributes(UInt32 portType, const char *portName, UInt32 subType, OSDictionary *properties)
{
IOAudioPort *port;
port = new IOAudioPort;
if (port) {
if (!port->initWithAttributes(portType, portName, subType, properties)) {
port->release();
port = 0;
}
}
return port;
}
bool AppleIntelAC97AudioDriver::createAudioPorts()
{
IOAudioPort * outputPort = 0;
IOAudioPort * inputPort = 0;
IOAudioLevelControl * outVolLeft = 0;
IOAudioLevelControl * outVolRight = 0;
IOAudioLevelControl * inGainLeft = 0;
IOAudioLevelControl * inGainRight = 0;
IOAudioToggleControl * outMute = 0;
IOAudioSelectorControl * inputSelector = 0;
bool success = false;
UInt32 initialVolume;
DebugLog("%s::%s\n", getName(), __FUNCTION__);
do {
// Master output port.
outputPort = IOAudioPort::withAttributes( kIOAudioPortTypeOutput,
"Master Output port" );
if ( outputPort == 0 ) break;
initialVolume = _audioCodec->getOutputVolumeMax() * 3 / 4;
// Left master output volume.
outVolLeft = IOAudioLevelControl::createVolumeControl(
/* initialValue */ initialVolume,
/* minValue */ _audioCodec->getOutputVolumeMin(),
/* maxValue */ _audioCodec->getOutputVolumeMax(),
/* minDB */ _audioCodec->getOutputVolumeMinDB(),
/* maxDB */ _audioCodec->getOutputVolumeMaxDB(),
/* channelID */ kIOAudioControlChannelIDDefaultLeft,
/* channelName */ kIOAudioControlChannelNameLeft,
/* cntrlID */ kControlOutputVolumeL,
/* usage */ kIOAudioControlUsageOutput );
if ( outVolLeft == 0 ) break;
outVolLeft->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( outVolLeft );
// Right master output volume.
outVolRight = IOAudioLevelControl::createVolumeControl(
/* initialValue */ initialVolume,
/* minValue */ _audioCodec->getOutputVolumeMin(),
/* maxValue */ _audioCodec->getOutputVolumeMax(),
/* minDB */ _audioCodec->getOutputVolumeMinDB(),
/* maxDB */ _audioCodec->getOutputVolumeMaxDB(),
/* channelID */ kIOAudioControlChannelIDDefaultRight,
/* channelName */ kIOAudioControlChannelNameRight,
/* cntrlID */ kControlOutputVolumeR,
/* usage */ kIOAudioControlUsageOutput );
if ( outVolRight == 0 ) break;
outVolRight->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( outVolRight );
// Mute master output.
outMute = IOAudioToggleControl::createMuteControl(
/* initialValue */ false,
/* channelID */ kIOAudioControlChannelIDAll,
/* channelName */ kIOAudioControlChannelNameAll,
/* cntrlID */ kControlOutputMute,
/* usage */ kIOAudioControlUsageOutput);
if ( outMute == 0 ) break;
outMute->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( outMute );
// Attach audio port to audio topology.
attachAudioPort( outputPort, _audioEngine, 0 );
// Create input port and attach it to audio topology.
inputPort = IOAudioPort::withAttributes( kIOAudioPortTypeInput,
"Main Input Port" );
if ( inputPort == 0 ) break;
// Left input gain.
initialVolume = 0x17;
inGainLeft = IOAudioLevelControl::createVolumeControl(
/* initialValue */ initialVolume,
/* minValue */ _audioCodec->getInputGainMin(),
/* maxValue */ _audioCodec->getInputGainMax(),
/* minDB */ _audioCodec->getInputGainMinDB(),
/* maxDB */ _audioCodec->getInputGainMaxDB(),
/* channelID */ kIOAudioControlChannelIDDefaultLeft,
/* channelName */ kIOAudioControlChannelNameLeft,
/* cntrlID */ kControlInputGainL,
/* usage */ kIOAudioControlUsageInput );
if ( inGainLeft == 0 ) break;
inGainLeft->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( inGainLeft );
// Right input gain.
inGainRight = IOAudioLevelControl::createVolumeControl(
/* initialValue */ initialVolume,
/* minValue */ _audioCodec->getInputGainMin(),
/* maxValue */ _audioCodec->getInputGainMax(),
/* minDB */ _audioCodec->getInputGainMinDB(),
/* maxDB */ _audioCodec->getInputGainMaxDB(),
/* channelID */ kIOAudioControlChannelIDDefaultRight,
/* channelName */ kIOAudioControlChannelNameRight,
/* cntrlID */ kControlInputGainR,
/* usage */ kIOAudioControlUsageInput );
if ( inGainRight == 0 ) break;
inGainRight->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( inGainRight );
// Create input source selector.
inputSelector = IOAudioSelectorControl::createInputSelector(
/* initialValue */ kInputSourceMic1,
/* channelID */ kIOAudioControlChannelIDAll,
/* channelName */ kIOAudioControlChannelNameAll,
/* cntrlID */ kControlInputSelector );
if ( inputSelector == 0 ) break;
inputSelector->addAvailableSelection( kInputSourceMic1, "Microphone" );
inputSelector->addAvailableSelection( kInputSourceLine, "Line In" );
inputSelector->setValueChangeHandler( audioControlChangeHandler, this );
_audioEngine->addDefaultAudioControl( inputSelector );
// Attach input port.
attachAudioPort( inputPort, 0, _audioEngine );
success = true;
}
while ( false );
if ( inputPort ) inputPort->release();
if ( outputPort ) outputPort->release();
if ( outVolLeft ) outVolLeft->release();
if ( outVolRight ) outVolRight->release();
if ( inGainLeft ) inGainLeft->release();
if ( inGainRight ) inGainRight->release();
if ( outMute ) outMute->release();
if ( inputSelector ) inputSelector->release();
return success;
}