PhantomAudioDevice.cpp   [plain text]

/*
  File:PhantomAudioDevice.cpp

  Contains:

  Version:1.0.0

  Copyright:Copyright ) 1997-2000 by Apple Computer, Inc., All Rights Reserved.

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*/

#include "PhantomAudioDevice.h"

#include "PhantomAudioEngine.h"

#include <IOKit/audio/IOAudioControl.h>
#include <IOKit/audio/IOAudioDefines.h>
#include <IOKit/IOLib.h>

#define super IOAudioDevice

OSDefineMetaClassAndStructors(PhantomAudioDevice, IOAudioDevice)

/*
 * initHardware()
 */

bool PhantomAudioDevice::initHardware(IOService *provider)
{
    bool result = false;
    
    IOLog("PhantomAudioDevice[%p]::initHardware(%p)\n", this, provider);
    
    if (!super::initHardware(provider)) {
        goto Done;
    }
    
    // add the hardware init code here
    
	// Pass pointers to the strings so that they can be localized.
    setDeviceName("DeviceName");
    setDeviceShortName("DeviceShortName");
    setManufacturerName("ManufacturerName");
	// Setting this flag causes the HAL to use the strings passed to it as keys into the Localizable.strings file.
	// This is true for control names as well as these string names.  Very useful for selector controls (not shown in this example).
    setProperty (kIOAudioDeviceLocalizedBundleKey, "PhantomAudioDriver.kext");
    
    if (!createAudioEngines()) {
        goto Done;
    }
    
    result = true;
    
Done:

    return result;
}

/*
 * createAudioEngines()
 */

bool PhantomAudioDevice::createAudioEngines()
{
    bool result = false;
    OSArray *audioEngineArray;
    
    IOLog("PhantomAudioDevice[%p]::createAudioEngine()\n", this);
    
    audioEngineArray = OSDynamicCast(OSArray, getProperty(AUDIO_ENGINES_KEY));
    
    if (audioEngineArray) {
        OSCollectionIterator *audioEngineIterator;
        
        audioEngineIterator = OSCollectionIterator::withCollection(audioEngineArray);
        if (audioEngineIterator) {
            OSDictionary *audioEngineDict;
            
            while (audioEngineDict = (OSDictionary *)audioEngineIterator->getNextObject()) {
                if (OSDynamicCast(OSDictionary, audioEngineDict) != NULL) {
                    PhantomAudioEngine *audioEngine;
                    
                    audioEngine = new PhantomAudioEngine;
                    if (audioEngine) {
                        if (audioEngine->init(audioEngineDict)) {
                            activateAudioEngine(audioEngine);
                        }
                        audioEngine->release();
                    }
                }
            }
            
            audioEngineIterator->release();
        }
    } else {
        IOLog("PhantomAudioDevice[%p]::createAudioEngine() - Error: no AudioEngine array in personality.\n", this);
        goto Done;
    }
    
    result = true;
    
Done:

    return result;
}

/*
 * volumeChangeHandler()
 */
 
IOReturn PhantomAudioDevice::volumeChangeHandler(IOService *target, IOAudioControl *volumeControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    PhantomAudioDevice *audioDevice;
    
    audioDevice = (PhantomAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->volumeChanged(volumeControl, oldValue, newValue);
    }
    
    return result;
}

/*
 * volumeChanged()
 */
 
IOReturn PhantomAudioDevice::volumeChanged(IOAudioControl *volumeControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("PhantomAudioDevice[%p]::volumeChanged(%p, %ld, %ld)\n", this, volumeControl, oldValue, newValue);
    
    if (volumeControl) {
        IOLog("\t-> Channel %ld\n", volumeControl->getChannelID());
    }
    
    // Add hardware volume code change 

    return kIOReturnSuccess;
}

/*
 * outputMuteChangeHandler()
 */
 
IOReturn PhantomAudioDevice::outputMuteChangeHandler(IOService *target, IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    PhantomAudioDevice *audioDevice;
    
    audioDevice = (PhantomAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->outputMuteChanged(muteControl, oldValue, newValue);
    }
    
    return result;
}

/*
 * outputMuteChanged()
 */
 
IOReturn PhantomAudioDevice::outputMuteChanged(IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("PhantomAudioDevice[%p]::outputMuteChanged(%p, %ld, %ld)\n", this, muteControl, oldValue, newValue);
    
    if (muteControl) {
        IOLog("\t-> Channel %ld\n", muteControl->getChannelID());
    }
    
    // Add output mute code here
    
    return kIOReturnSuccess;
}

/*
 * gainChangeHandler()
 */
 
IOReturn PhantomAudioDevice::gainChangeHandler(IOService *target, IOAudioControl *gainControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    PhantomAudioDevice *audioDevice;
    
    audioDevice = (PhantomAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->gainChanged(gainControl, oldValue, newValue);
    }
    
    return result;
}

/*
 * gainChanged()
 */
 
IOReturn PhantomAudioDevice::gainChanged(IOAudioControl *gainControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("PhantomAudioDevice[%p]::gainChanged(%p, %ld, %ld)\n", this, gainControl, oldValue, newValue);
    
    if (gainControl) {
        IOLog("\t-> Channel %ld\n", gainControl->getChannelID());
    }
    
    // Add hardware gain change code here 

    return kIOReturnSuccess;
}

/*
 * inputMuteChangeHandler()
 */
 
IOReturn PhantomAudioDevice::inputMuteChangeHandler(IOService *target, IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    PhantomAudioDevice *audioDevice;
    
    audioDevice = (PhantomAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->inputMuteChanged(muteControl, oldValue, newValue);
    }
    
    return result;
}

/*
 * inputMuteChanged()
 */
 
IOReturn PhantomAudioDevice::inputMuteChanged(IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("PhantomAudioDevice[%p]::inputMuteChanged(%p, %ld, %ld)\n", this, muteControl, oldValue, newValue);
    
    if (muteControl) {
        IOLog("\t-> Channel %ld\n", muteControl->getChannelID());
    }
    
    // Add input mute change code here
    
    return kIOReturnSuccess;
}

/*
 * passThruChangeHandler()
 */
 
IOReturn PhantomAudioDevice::passThruChangeHandler(IOService *target, IOAudioControl *passThruControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    PhantomAudioDevice *audioDevice;
    
    audioDevice = (PhantomAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->passThruChanged(passThruControl, oldValue, newValue);
    }
    
    return result;
}

/*
 * passThruChanged()
 */
 
IOReturn PhantomAudioDevice::passThruChanged(IOAudioControl *passThruControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("PhantomAudioDevice[%p]::passThruChanged(%p, %ld, %ld)\n", this, passThruControl, oldValue, newValue);
    
    if (passThruControl) {
        IOLog("\t-> Channel %ld\n", passThruControl->getChannelID());
    }
        
    return kIOReturnSuccess;
}