/*
  File:SampleAudioDevice.cpp

  Contains:

  Version:1.0.0

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

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*/


#include "SampleAudioDevice.h"

#include "SampleAudioEngine.h"

#include <IOKit/audio/IOAudioControl.h>
#include <IOKit/audio/IOAudioLevelControl.h>
#include <IOKit/audio/IOAudioToggleControl.h>
#include <IOKit/audio/IOAudioDefines.h>

#include <IOKit/IOLib.h>

#define super IOAudioDevice

OSDefineMetaClassAndStructors(SampleAudioDevice, IOAudioDevice)

bool SampleAudioDevice::initHardware(IOService *provider)
{
    bool result = false;
    
    IOLog("SampleAudioDevice[%p]::initHardware(%p)\n", this, provider);
    
    if (!super::initHardware(provider)) {
        goto Done;
    }
    
    // add the hardware init code here
    
    setDeviceName("Sample Audio Device");
    setDeviceShortName("SampleAudio");
    setManufacturerName("My Company");

#error Put your own hardware initialization code here...and in other routines!!
    
    if (!createAudioEngine()) {
        goto Done;
    }
    
    result = true;
    
Done:

    return result;
}

void SampleAudioDevice::free()
{
    super::free();
}

bool SampleAudioDevice::createAudioEngine()
{
    bool result = false;
    SampleAudioEngine *audioEngine = NULL;
    IOAudioControl *control;
    
    IOLog("SampleAudioDevice[%p]::createAudioEngine()\n", this);
    
    audioEngine = new SampleAudioEngine;
    if (!audioEngine) {
        goto Done;
    }
    
    // Init the new audio engine
    // The audio engine subclass could be defined to take any number of parameters for its
    // initialization - use it like a constructor
    if (!audioEngine->init()) {
        goto Done;
    }
    
    // Create a left & right output volume control with an int range from 0 to 65535
    // and a db range from -22.5 to 0.0
    // Once each control is added to the audio engine, they should be released
    // so that when the audio engine is done with them, they get freed properly
    control = IOAudioLevelControl::createVolumeControl(65535,	// Initial value
                                                        0,		// min value
                                                        65535,	// max value
                                                        (-22 << 16) + (32768),	// -22.5 in IOFixed (16.16)
                                                        0,		// max 0.0 in IOFixed
                                                        kIOAudioControlChannelIDDefaultLeft,
                                                        kIOAudioControlChannelNameLeft,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageOutput);
    if (!control) {
        goto Done;
    }
    
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)volumeChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();
    
    control = IOAudioLevelControl::createVolumeControl(65535,	// Initial value
                                                        0,		// min value
                                                        65535,	// max value
                                                        (-22 << 16) + (32768),	// min -22.5 in IOFixed (16.16)
                                                        0,		// max 0.0 in IOFixed
                                                        kIOAudioControlChannelIDDefaultRight,	// Affects right channel
                                                        kIOAudioControlChannelNameRight,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageOutput);
    if (!control) {
        goto Done;
    }
        
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)volumeChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();

    // Create an output mute control
    control = IOAudioToggleControl::createMuteControl(false,	// initial state - unmuted
                                                        kIOAudioControlChannelIDAll,	// Affects all channels
                                                        kIOAudioControlChannelNameAll,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageOutput);
                                
    if (!control) {
        goto Done;
    }
        
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)outputMuteChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();

    // Create a left & right input gain control with an int range from 0 to 65535
    // and a db range from 0 to 22.5
    control = IOAudioLevelControl::createVolumeControl(65535,	// Initial value
                                                        0,		// min value
                                                        65535,	// max value
                                                        0,		// min 0.0 in IOFixed
                                                        (22 << 16) + (32768),	// 22.5 in IOFixed (16.16)
                                                        kIOAudioControlChannelIDDefaultLeft,
                                                        kIOAudioControlChannelNameLeft,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageInput);
    if (!control) {
        goto Done;
    }
    
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)gainChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();
    
    control = IOAudioLevelControl::createVolumeControl(65535,	// Initial value
                                                        0,		// min value
                                                        65535,	// max value
                                                        0,		// min 0.0 in IOFixed
                                                        (22 << 16) + (32768),	// max 22.5 in IOFixed (16.16)
                                                        kIOAudioControlChannelIDDefaultRight,	// Affects right channel
                                                        kIOAudioControlChannelNameRight,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageInput);
    if (!control) {
        goto Done;
    }
        
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)gainChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();

    // Create an input mute control
    control = IOAudioToggleControl::createMuteControl(false,	// initial state - unmuted
                                                        kIOAudioControlChannelIDAll,	// Affects all channels
                                                        kIOAudioControlChannelNameAll,
                                                        0,		// control ID - driver-defined
                                                        kIOAudioControlUsageInput);
                                
    if (!control) {
        goto Done;
    }
        
    control->setValueChangeHandler((IOAudioControl::IntValueChangeHandler)inputMuteChangeHandler, this);
    audioEngine->addDefaultAudioControl(control);
    control->release();

    // Active the audio engine - this will cause the audio engine to have start() and initHardware() called on it
    // After this function returns, that audio engine should be ready to begin vending audio services to the system
    activateAudioEngine(audioEngine);
    // Once the audio engine has been activated, release it so that when the driver gets terminated,
    // it gets freed
    audioEngine->release();
    
    result = true;
    
Done:

    if (!result && (audioEngine != NULL)) {
        audioEngine->release();
    }

    return result;
}

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

IOReturn SampleAudioDevice::volumeChanged(IOAudioControl *volumeControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("SampleAudioDevice[%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;
}
    
IOReturn SampleAudioDevice::outputMuteChangeHandler(IOService *target, IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    SampleAudioDevice *audioDevice;
    
    audioDevice = (SampleAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->outputMuteChanged(muteControl, oldValue, newValue);
    }
    
    return result;
}

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

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

IOReturn SampleAudioDevice::gainChanged(IOAudioControl *gainControl, SInt32 oldValue, SInt32 newValue)
{
    IOLog("SampleAudioDevice[%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;
}
    
IOReturn SampleAudioDevice::inputMuteChangeHandler(IOService *target, IOAudioControl *muteControl, SInt32 oldValue, SInt32 newValue)
{
    IOReturn result = kIOReturnBadArgument;
    SampleAudioDevice *audioDevice;
    
    audioDevice = (SampleAudioDevice *)target;
    if (audioDevice) {
        result = audioDevice->inputMuteChanged(muteControl, oldValue, newValue);
    }
    
    return result;
}

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