CWE-ou-minkata/Sources/Plasma/PubUtilLib/plAudio/plAudioCaps.cpp

/*==LICENSE==*

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Copyright (C) 2011  Cyan Worlds, Inc.

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 or by snail mail at:
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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plAudioCaps - Utility class to query and detect available audio options.//
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#include "HeadSpin.h"
#include <al.h>
#include <alc.h>
#include "plEAXEffects.h"

#include "plAudioCaps.h"
#ifdef EAX_SDK_AVAILABLE
#include <eax.h>
#include <eaxlegacy.h>
#endif
#include <DShow.h>

#include "plStatusLog/plStatusLog.h"

#define MAX_NUM_SOURCES 128
#define kLogMe if( fLog != nil ) fLog->AddLineF( 
#define MAX_AUDIOCARD_NAME 256

//////////////////////////////////////////////////////////////////////////////
//// Detector Functions //////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

plAudioCaps plAudioCapsDetector::fCaps;
hsBool plAudioCapsDetector::fGotCaps = false;

plStatusLog *plAudioCapsDetector::fLog = nil;

plAudioCapsDetector::plAudioCapsDetector()
{
}

plAudioCapsDetector::~plAudioCapsDetector()
{
}

//// Detect //////////////////////////////////////////////////////////////////
//  Our big function that does all of our work

plAudioCaps &plAudioCapsDetector::Detect( hsBool logIt, hsBool init )
{
    // If we already have the device capabilities, just return them
    if(fGotCaps) return fCaps;
    fCaps.fIsAvailable = true;
    
    ALCdevice *     device;
    ALCcontext *    context;
    
    if(init)
    {
        device = alcOpenDevice(0);
        if(!device)
        {
            fCaps.fIsAvailable = false;
        }

        context = alcCreateContext(device, 0);
        if(alGetError() != AL_NO_ERROR)
        {
            fCaps.fIsAvailable = false;
        }
        alcMakeContextCurrent(context);
        if(alGetError() != AL_NO_ERROR)
        {
            fCaps.fIsAvailable = false;
        }
    }
    
    EnumerateAudioDevices();

    if( logIt )
        fLog = plStatusLogMgr::GetInstance().CreateStatusLog( 30, "audioCaps.log" );
    else
        fLog = nil;

    kLogMe 0xff00ff00, "Starting audio caps detection..." );

    // find the max number of sources
    ALuint sources[MAX_NUM_SOURCES];
    ALuint i = 0;
    for(; i < MAX_NUM_SOURCES; i++)
    {
        alGenSources(1, &sources[i]);
        if(alGetError() != AL_NO_ERROR)
            break;
        fCaps.fMaxNumSources++;
    }
    alDeleteSources(i, sources); 
    kLogMe 0xffffffff, "Max Number of sources: %d", i);
    plStatusLog::AddLineS("audio.log", "Max Number of sources: %d", i);

    // Detect EAX support
    kLogMe 0xff00ff00, "Attempting to detect EAX support..." );
    fCaps.fEAXAvailable = IDetectEAX( );

    kLogMe 0xff00ff00, "Audio caps detection COMPLETE." );
    delete fLog;
    
    fGotCaps = true; // We've got the device capabilities

    if(init)
    {   
        alcMakeContextCurrent(nil);
        alcDestroyContext(context);
        alcCloseDevice(device);
    }
    return fCaps;
}

void plAudioCapsDetector::EnumerateAudioDevices()
{ 
    ICreateDevEnum *pDevEnum;
    IEnumMoniker *pEnumMon;
    IMoniker *pMoniker;
    ULONG cFetched;
    HRESULT hr;
    char audioCardName[MAX_AUDIOCARD_NAME];
    short *pShort;

    // Enumerate audio devices
    hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (void **)&pDevEnum);
    if(SUCCEEDED(hr))
    {
        hr = pDevEnum->CreateClassEnumerator(CLSID_AudioRendererCategory, &pEnumMon, 0);
        if(SUCCEEDED(hr))
        {
            while(pEnumMon->Next(1, &pMoniker, &cFetched) == S_OK)
            {
                if(pMoniker)
                {
                    IPropertyBag *pPropBag;
                    hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pPropBag);
                    if(SUCCEEDED(hr))
                    {
                        VARIANT varName;
                        VariantInit(&varName);
                        hr = pPropBag->Read(L"FriendlyName", &varName, 0);
                        memset(audioCardName, 0, MAX_AUDIOCARD_NAME);
                        pShort = varName.piVal;

                        // copy from wide character array to char array
                        for(int i = 0; *pShort != 0 && i < MAX_AUDIOCARD_NAME; pShort++, i++)
                        {
                            audioCardName[i] = (char)*pShort;
                        }
                        
                        if(SUCCEEDED(hr))
                        {
                            plStatusLog::AddLineS("audiocaps.log", audioCardName );
                        }
                        VariantClear(&varName);
                        pPropBag->Release();
                    }
                    pMoniker->Release();
                }
            }
            pEnumMon->Release();
        }
        pDevEnum->Release();
    }
}

//// IDetectEAX //////////////////////////////////////////////////////////////
//  Attempt to actually init the EAX listener.Note that we can potentially do
//  this even if we didn't load the EAX Unified driver (we could just be 
//  running EAX 3.0 native), so you can really just think of the EAX Unified 
//  init code above as a way of trying to make sure this line here will 
//  succeed as often as possible.

hsBool  plAudioCapsDetector::IDetectEAX(  )
{
#ifdef EAX_SDK_AVAILABLE
    hsBool gotSupport = true;

    if(!alIsExtensionPresent((ALchar *)"EAX4.0"))       // is eax 4 supported
    {
        if(!alIsExtensionPresent((ALchar *) "EAX4.0Emulated"))      // is an earlier version of eax supported
        {
            kLogMe 0xff00ff00, "EAX not supported");
            gotSupport = false;
        }
        else
        {
            fCaps.fEAXUnified = true;
            kLogMe 0xff00ff00, "EAX 4 Emulated supported");
        }
    }
    else
    {
        kLogMe 0xff00ff00, "EAX 4 available");
    }   
    return gotSupport;
#else
    kLogMe 0xff00ff00, "EAX disabled in this build");
    return false;
#endif
}