C++ System::update方法代码示例

	int Game::playEnvironment()
	{
			bool soundDone=false;
			FMOD::System* system;
			FMOD_RESULT result = FMOD::System_Create(&system);
			system->init(32, FMOD_INIT_NORMAL, NULL);
			FMOD::Sound* sound;
			
			result = system->createSound("Ocean.WAV",FMOD_LOOP_NORMAL,NULL, &sound);
			FMOD::Channel* channel = 0;
			bool pauseSound = false;


			channel->isPlaying(&pauseSound);

			result = system->playSound(FMOD_CHANNEL_FREE, sound,false, &channel);
			soundDone=true;


			while (soundDone!=true)
			{
			channel->setPaused(false);
			system->update();

			result = sound->release();
			result = system->close();
			result = system->release();
			}
			return 0;
	}

    // Updates the FMOD Studio system.
    void Update()
    {
      // Invoke the AudioUpdate event to allow
      //  EventInstance objects to update.
      EventData eventData;
      eventData["Audio"] = this;
      InvokeEvent("AudioUpdate", eventData);

      // Update the FMOD Studio system.
      FmodCall(system->update());
    }

	void FMOD_System::Update( const float& posX, const float& posY, const float& posZ, 
		const float& forwardX, const float& forwardY, const float& forwardZ, 
		const float& ballPosX, const float& ballPosY, const float& ballPosZ )
	{
		FMOD_VECTOR position = { posX, posY, posZ };
		FMOD_VECTOR forward = { forwardX, forwardY, forwardZ };
		system->set3DListenerAttributes( 0, &position, nullptr, &forward, nullptr );
		ballPosition.x = ballPosX;
		ballPosition.y = ballPosY;
		ballPosition.z = ballPosZ;
		system->update();
	}

void AudioVisualizerApp::update()
{
	// update FMOD so it can notify us of events
	mFMODSystem->update();

	// handle signal: if audio has ended, play next file
	if(mIsAudioPlaying && signalChannelEnd)
		playAudio( nextAudio( mAudioPath ) );

	// reset FMOD signals
	signalChannelEnd= false;

	// get spectrum for left and right channels and copy it into our channels
	float* pDataLeft = mChannelLeft.getData() + kBands * mOffset;
	float* pDataRight = mChannelRight.getData() + kBands * mOffset;

	mFMODSystem->getSpectrum( pDataLeft, kBands, 0, FMOD_DSP_FFT_WINDOW_HANNING );	
	mFMODSystem->getSpectrum( pDataRight, kBands, 1, FMOD_DSP_FFT_WINDOW_HANNING );

	// increment texture offset
	mOffset = (mOffset+1) % kHistory;

	// clear the spectrum for this row to avoid old data from showing up
	pDataLeft = mChannelLeft.getData() + kBands * mOffset;
	pDataRight = mChannelRight.getData() + kBands * mOffset;
	memset( pDataLeft, 0, kBands * sizeof(float) );
	memset( pDataRight, 0, kBands * sizeof(float) );

	// animate camera if mouse has not been down for more than 30 seconds
	if(!mIsMouseDown && (getElapsedSeconds() - mMouseUpTime) > mMouseUpDelay)
	{
		float t = float( getElapsedSeconds() );
		float x = 0.5f + 0.5f * math<float>::cos( t * 0.07f );
		float y = 0.1f - 0.2f * math<float>::sin( t * 0.09f );
		float z = 0.25f * math<float>::sin( t * 0.05f ) - 0.25f;
		Vec3f eye = Vec3f(kWidth * x, kHeight * y, kHeight * z);

		x = 1.0f - x;
		y = -0.3f;
		z = 0.6f + 0.2f *  math<float>::sin( t * 0.12f );
		Vec3f interest = Vec3f(kWidth * x, kHeight * y, kHeight * z);

		// gradually move to eye position and center of interest
		mCamera.setEyePoint( eye.lerp(0.995f, mCamera.getEyePoint()) );
		mCamera.setCenterOfInterestPoint( interest.lerp(0.990f, mCamera.getCenterOfInterestPoint()) );
	}
}

void FmodExMultiple3DSoundPlayerApp::update()
{
	
	
	//Update camera
	Vec3f camDirection = camCenter;
	camDirection.normalize();
	camEye = camInitialEye + camDistance * camDirection;
	cam.setViewDirection(camCenter);
	cam.setEyePoint(camEye);
	gl::setMatrices( cam );
	gl::rotate( sceneRotation );
	
	//Update 3D Sounds
	
	Vec3f up = cam.getWorldUp();
	up.invert();
	
	listenerUp.x = up.x;
	listenerUp.y = up.y; 
	listenerUp.z = up.z;
	listenerPos.x = camEye.x; 
	listenerPos.y = camEye.y;  
	listenerPos.z = camEye.z;
	//forward = camCenter - camEye;
	//forward.normalize();
	listenerForward.x = camCenter.x; 
	listenerForward.y = camCenter.y; 
	listenerForward.z = camCenter.z;
	sys->set3DListenerAttributes( 0, &listenerPos, &listenerVelocity, &listenerForward, &listenerUp);
	
	if(!player1.getIsPlaying())
		player1.play();
	
	if(!player2.getIsPlaying())
		player2.play();	
	
	player1.channel->set3DAttributes( &sound3DPosition1, &sound3DVelocity1);
	player2.channel->set3DAttributes( &sound3DPosition2, &sound3DVelocity2);
	
	//we update the fmod sound system
	sys->update();
	//FmodexUpdate();
	
}

void			playBackground(void)
{
	FMOD::System *		Syst = NULL;
	FMOD::Channel *		Chan = NULL;
	FMOD::Sound *		s;

	if (Syst == NULL)
	{
		if (FMOD::System_Create(&Syst) != FMOD_OK)
			fmod_exit();
		if (Syst->init(32, FMOD_INIT_NORMAL, 0) != FMOD_OK)
			fmod_exit();
	}
	if (Syst->createSound("mp3/background.mp3", FMOD_LOOP_NORMAL, 0, &s) != FMOD_OK)
		fmod_exit();
	if (Syst->playSound(s, NULL, false, &Chan) != FMOD_OK)
		fmod_exit();
	Syst->update();
}

void DuckHuntMain::UpdateScene(float dt)
{
	//
	// Control the camera.
	//
	if (GetAsyncKeyState('W') & 0x8000)
		mCam.Walk(10.0f*dt);

	if (GetAsyncKeyState('S') & 0x8000)
		mCam.Walk(-10.0f*dt);

	if (GetAsyncKeyState('A') & 0x8000)
		mCam.Strafe(-10.0f*dt);

	if (GetAsyncKeyState('D') & 0x8000)
		mCam.Strafe(10.0f*dt);

	//
	// Animate the lights (and hence shadows).
	//

	////
	//// Walk/fly mode
	////
	//if (GetAsyncKeyState('2') & 0x8000)
	//	mWalkCamMode = true;
	//if (GetAsyncKeyState('3') & 0x8000)
	//	mWalkCamMode = false;

	//// 
	//// Clamp camera to terrain surface in walk mode.
	////
		XMFLOAT3 camPos = mCam.GetPosition();
		float y = mTerrain.GetHeight(camPos.x, camPos.z);
		mCam.SetPosition(camPos.x, y + 2.0f, camPos.z);
	

	BuildShadowTransform();

	mCam.UpdateViewMatrix();
	mSystem->update();
}

	int Game::playSound(bool Sound)
	{

			bool soundDone= false;
			//declare variable for FMOD system object
			FMOD::System* system;
			//allocate memory for the FMOD system object
			FMOD_RESULT result = FMOD::System_Create(&system);
			//initialize the FMOD system object
			system->init(32, FMOD_INIT_NORMAL, NULL);
			//declare variable for the sound object
			FMOD::Sound* sound;
			//created sound object and specify the sound 
			
			result = system->createSound("Cathedral_of_Light.mp3",FMOD_LOOP_NORMAL,NULL, &sound);
			// play sound - 1st parameter can be combined flags (| separator)
			FMOD::Channel* channel = 0;

			//start sound

			bool pauseSound=false;

			channel->isPlaying(&pauseSound);

			result = system->playSound(FMOD_CHANNEL_FREE, sound, Sound, &channel);
			soundDone=true;


			while (soundDone!=true)
			{
			channel->setPaused(false);
			system->update();

			//}
			// release resources
			result = sound->release();
			result = system->close();
			result = system->release();
			}
			return 0;

	}

int main(int argc, char *argv[])
{
    FMOD::System     *system;
    FMOD::Sound      *sound;
    FMOD::Channel    *channel = 0;
    FMOD_RESULT       result;
    int               key;
    unsigned int      version;

    /*
        Create a System object and initialize.
    */
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        printf("Error!  You are using an old version of FMOD %08x.  This program requires %08x\n", version, FMOD_VERSION);
        return 0;
    }

    result = system->init(1, FMOD_INIT_NORMAL, 0);
    ERRCHECK(result);

    result = system->setFileSystem(myopen, myclose, myread, myseek, 0, 0, 2048);
    ERRCHECK(result);

    result = system->createStream("../media/wave.mp3", FMOD_HARDWARE | FMOD_LOOP_NORMAL | FMOD_2D, 0, &sound);
    ERRCHECK(result);

    printf("========================================================================\n");
    printf("File Callbacks Example.  Copyright (c) Firelight Technologies 2004-2015.\n");
    printf("========================================================================\n");
    printf("\n");
    printf("Press space to pause, Esc to quit\n");
    printf("\n");

    /*
        Play the sound.
    */

    result = system->playSound(FMOD_CHANNEL_FREE, sound, false, &channel);
    ERRCHECK(result);

    /*
        Main loop.
    */
    do
    {
        if (kbhit())
        {
            key = getch();

            switch (key)
            {
                case ' ' :
                {
                    bool paused;
                    channel->getPaused(&paused);
                    channel->setPaused(!paused);
                    break;
                }
            }
        }

        system->update();

        if (channel)
        {
            unsigned int ms;
            unsigned int lenms;
            bool         playing;
            bool         paused;

            channel->isPlaying(&playing);
            if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE))
            {
                ERRCHECK(result);
            }

            result = channel->getPaused(&paused);
            if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE))
            {
                ERRCHECK(result);
            }

            result = channel->getPosition(&ms, FMOD_TIMEUNIT_MS);
            if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE))
            {
                ERRCHECK(result);
            }

            result = sound->getLength(&lenms, FMOD_TIMEUNIT_MS);
            if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE))
            {
                ERRCHECK(result);
            }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        if (kbhit())
        {
            key = getch();

            switch (key)
            {
                case 'r' :
                case 'R' :
                {
                    result = system->recordStart(recorddriver, sound, looping);
                    ERRCHECK(result);
                    break;
                }
                case 'p' :
                case 'P' :
                {
                    if (looping)
                    {
                        sound->setMode(FMOD_LOOP_NORMAL);
                    }
                    else
                    {
                        sound->setMode(FMOD_LOOP_OFF);
                    }
                    ERRCHECK(result);

                    result = system->playSound(FMOD_CHANNEL_REUSE, sound, false, &channel);
                    ERRCHECK(result);
                    break;
                }
                case 'l' :
                case 'L' :
                {
                    looping = !looping;
                    break;
                }
                case 's' :
                case 'S' :
                {
                    result = system->recordStop(recorddriver);
                    if (channel)
                    {
                        channel->stop();
                        channel = 0;
                    }
                    break;
                }
                case 'w' :
                case 'W' :
                {
                    printf("Writing to record.wav ...                                                     \r");

                    SaveToWav(sound);
                    Sleep(500);
                    break;
                }
            }
        }

        sound->getLength(&length, FMOD_TIMEUNIT_PCM);
        ERRCHECK(result);

        system->isRecording(recorddriver, &recording);
        ERRCHECK(result);

        system->getRecordPosition(recorddriver, &recordpos);
        ERRCHECK(result);

        if (channel)
        {
            channel->isPlaying(&playing);
            ERRCHECK(result);

            channel->getPosition(&playpos, FMOD_TIMEUNIT_PCM);
            ERRCHECK(result);
        }

        printf("State: %-19s. Record pos = %6d : Play pos = %6d : Loop %-3s\r", recording ? playing ? "Recording / playing" : "Recording" : playing ? "Playing" : "Idle", recordpos, playpos, looping ? "On" : "Off");
        fflush(stdout);

        system->update();

        fflush(stdout);
        Sleep(10);

    } while (key != 27);

    printf("\n");

    /*
        Shut down
    */
    result = sound->release();
    ERRCHECK(result);

    result = system->release();
    ERRCHECK(result);

    return 0;
}

int FMOD_Main()
{
    FMOD::Channel *channel = NULL;
    unsigned int samplesRecorded = 0;
    unsigned int samplesPlayed = 0;
    bool dspEnabled = false;

    void *extraDriverData = NULL;
    Common_Init(&extraDriverData);

    /*
        Create a System object and initialize.
    */
    FMOD::System *system = NULL;
    FMOD_RESULT result = FMOD::System_Create(&system);
    ERRCHECK(result);

    unsigned int version = 0;
    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
    }

    result = system->init(100, FMOD_INIT_NORMAL, extraDriverData);
    ERRCHECK(result);

    int numDrivers = 0;
    result = system->getRecordNumDrivers(NULL, &numDrivers);
    ERRCHECK(result);

    if (numDrivers == 0)
    {
        Common_Fatal("No recording devices found/plugged in!  Aborting.");
    }

    /*
        Determine latency in samples.
    */
    int nativeRate = 0;
    int nativeChannels = 0;
    result = system->getRecordDriverInfo(DEVICE_INDEX, NULL, 0, NULL, &nativeRate, NULL, &nativeChannels, NULL);
    ERRCHECK(result);

    unsigned int driftThreshold = (nativeRate * DRIFT_MS) / 1000;       /* The point where we start compensating for drift */
    unsigned int desiredLatency = (nativeRate * LATENCY_MS) / 1000;     /* User specified latency */
    unsigned int adjustedLatency = desiredLatency;                      /* User specified latency adjusted for driver update granularity */
    int actualLatency = desiredLatency;                                 /* Latency measured once playback begins (smoothened for jitter) */

    /*
        Create user sound to record into, then start recording.
    */
    FMOD_CREATESOUNDEXINFO exinfo = {0};
    exinfo.cbsize           = sizeof(FMOD_CREATESOUNDEXINFO);
    exinfo.numchannels      = nativeChannels;
    exinfo.format           = FMOD_SOUND_FORMAT_PCM16;
    exinfo.defaultfrequency = nativeRate;
    exinfo.length           = nativeRate * sizeof(short) * nativeChannels; /* 1 second buffer, size here doesn't change latency */
    
    FMOD::Sound *sound = NULL;
    result = system->createSound(0, FMOD_LOOP_NORMAL | FMOD_OPENUSER, &exinfo, &sound);
    ERRCHECK(result);

    result = system->recordStart(DEVICE_INDEX, sound, true);
    ERRCHECK(result);

    unsigned int soundLength = 0;
    result = sound->getLength(&soundLength, FMOD_TIMEUNIT_PCM);
    ERRCHECK(result);

    /*
        Main loop
    */
    do
    {
        Common_Update();

        /*
            Add a DSP effect -- just for fun
        */
        if (Common_BtnPress(BTN_ACTION1))
        {
            FMOD_REVERB_PROPERTIES propOn = FMOD_PRESET_CONCERTHALL;
            FMOD_REVERB_PROPERTIES propOff = FMOD_PRESET_OFF;

            dspEnabled = !dspEnabled;

            result = system->setReverbProperties(0, dspEnabled ? &propOn : &propOff);
            ERRCHECK(result);
        }

        result = system->update();
        ERRCHECK(result);
       
        /*
            Determine how much has been recorded since we last checked
        */
        unsigned int recordPos = 0;
//.........这里部分代码省略.........

int main(int argc, char *argv[])
{
    FMOD::System           *system;
    FMOD::Sound            *sound;
    FMOD::Channel          *channel = 0;
    FMOD_RESULT             result;
    FMOD_MODE               mode = FMOD_2D | FMOD_OPENUSER | FMOD_LOOP_NORMAL | FMOD_HARDWARE;
    int                     key;
    int                     channels = 2;
    FMOD_CREATESOUNDEXINFO  createsoundexinfo;
    unsigned int            version;

    /*
        Create a System object and initialize.
    */
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        printf("Error!  You are using an old version of FMOD %08x.  This program requires %08x\n", version, FMOD_VERSION);
        return 0;
    }

    result = system->init(32, FMOD_INIT_NORMAL, 0);
    ERRCHECK(result);
        
    printf("============================================================================\n");
    printf("User Created Sound Example.  Copyright (c) Firelight Technologies 2004-2014.\n");
    printf("============================================================================\n");
    printf("Sound played here is generated in realtime.  It will either play as a stream\n");
    printf("which means it is continually filled as it is playing, or it will play as a \n");
    printf("static sample, which means it is filled once as the sound is created, then  \n");
    printf("when played it will just play that short loop of data.                      \n");
    printf("============================================================================\n");
    printf("\n");

    do
    {
        printf("Press 1 to play as a runtime decoded stream. (will carry on infinitely)\n");
        printf("Press 2 to play as a static in memory sample. (loops a short block of data)\n");
        printf("Press Esc to quit.\n\n");
        key = _getch();

    } while (key != 27 && key != '1' && key != '2');

    if (key == 27)
    {
        return 0;
    }
    else if (key == '1')
    {
        mode |= FMOD_CREATESTREAM;
    }

    memset(&createsoundexinfo, 0, sizeof(FMOD_CREATESOUNDEXINFO));
    createsoundexinfo.cbsize            = sizeof(FMOD_CREATESOUNDEXINFO);              /* required. */
    createsoundexinfo.decodebuffersize  = 44100;                                       /* Chunk size of stream update in samples.  This will be the amount of data passed to the user callback. */
    createsoundexinfo.length            = 44100 * channels * sizeof(signed short) * 5; /* Length of PCM data in bytes of whole song (for Sound::getLength) */
    createsoundexinfo.numchannels       = channels;                                    /* Number of channels in the sound. */
    createsoundexinfo.defaultfrequency  = 44100;                                       /* Default playback rate of sound. */
    createsoundexinfo.format            = FMOD_SOUND_FORMAT_PCM16;                     /* Data format of sound. */
    createsoundexinfo.pcmreadcallback   = pcmreadcallback;                             /* User callback for reading. */
    createsoundexinfo.pcmsetposcallback = pcmsetposcallback;                           /* User callback for seeking. */

    result = system->createSound(0, mode, &createsoundexinfo, &sound);
    ERRCHECK(result);

    printf("Press space to pause, Esc to quit\n");
    printf("\n");

    /*
        Play the sound.
    */

    result = system->playSound(FMOD_CHANNEL_FREE, sound, 0, &channel);
    ERRCHECK(result);

    /*
        Main loop.
    */
    do
    {
        if (_kbhit())
        {
            key = _getch();

            switch (key)
            {
                case ' ' :
                {
                    bool paused;
                    channel->getPaused(&paused);
                    channel->setPaused(!paused);
                    break;
                }
            }
//.........这里部分代码省略.........

int main(int argc, char *argv[])
{
    FMOD::System     *system;
    FMOD::Sound      *sound1, *sound2, *sound3;
    FMOD::Channel    *channel = 0;
    FMOD_RESULT       result;
    int               key;
    unsigned int      version;

    /*
        Global Settings
    */
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        printf("Error!  You are using an old version of FMOD %08x.  This program requires %08x\n", version, FMOD_VERSION);
        getch();
        return 0;
    }

    result = system->init(32, FMOD_INIT_NORMAL, NULL);
    ERRCHECK(result);

    result = system->createSound("../media/drumloop.wav", FMOD_SOFTWARE, 0, &sound1);
    ERRCHECK(result);

    result = sound1->setMode(FMOD_LOOP_OFF);
    ERRCHECK(result);

    result = system->createSound("../media/jaguar.wav", FMOD_SOFTWARE, 0, &sound2);
    ERRCHECK(result);

    result = system->createSound("../media/swish.wav", FMOD_SOFTWARE, 0, &sound3);
    ERRCHECK(result);

    printf("===================================================================\n");
    printf("PlaySound Example.  Copyright (c) Firelight Technologies 2004-2011.\n");
    printf("===================================================================\n");
    printf("\n");
    printf("Press '1' to Play a mono sound using software mixing\n");
    printf("Press '2' to Play a mono sound using software mixing\n");
    printf("Press '3' to Play a stereo sound using software mixing\n");
    printf("Press 'Esc' to quit\n");
    printf("\n");

    /*
        Main loop.
    */
    do
    {
        if (kbhit())
        {
            key = getch();

            switch (key)
            {
                case '1' :
                {
                    result = system->playSound(FMOD_CHANNEL_FREE, sound1, 0, &channel);
                    ERRCHECK(result);
                    break;
                }
                case '2' :
                {
                    result = system->playSound(FMOD_CHANNEL_FREE, sound2, 0, &channel);
                    ERRCHECK(result);
                    break;
                }
                case '3' :
                {
                    result = system->playSound(FMOD_CHANNEL_FREE, sound3, 0, &channel);
                    ERRCHECK(result);
                    break;
                }
            }
        }

        system->update();

        {
            unsigned int ms = 0;
            unsigned int lenms = 0;
            bool         playing = 0;
            bool         paused = 0;
            int          channelsplaying = 0;

            if (channel)
            {
                FMOD::Sound *currentsound = 0;

                result = channel->isPlaying(&playing);
                if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE) && (result != FMOD_ERR_CHANNEL_STOLEN))
                {
                    ERRCHECK(result);
                }
//.........这里部分代码省略.........

//.........这里部分代码省略.........

            bypass = !bypass;

            result = dsphighpass->setBypass(bypass);
            ERRCHECK(result);
        }

        if (Common_BtnPress(BTN_ACTION3))
        {
            bool bypass;

            result = dspecho->getBypass(&bypass);
            ERRCHECK(result);

            bypass = !bypass;

            result = dspecho->setBypass(bypass);
            ERRCHECK(result);
        }

        if (Common_BtnPress(BTN_ACTION4))
        {
            bool bypass;

            result = dspflange->getBypass(&bypass);
            ERRCHECK(result);

            bypass = !bypass;

            result = dspflange->setBypass(bypass);
            ERRCHECK(result);
        }

        result = system->update();
        ERRCHECK(result);

        {
            bool paused = 0;
            bool dsplowpass_bypass;
            bool dsphighpass_bypass;
            bool dspecho_bypass;
            bool dspflange_bypass;

            dsplowpass   ->getBypass(&dsplowpass_bypass);
            dsphighpass  ->getBypass(&dsphighpass_bypass);
            dspecho      ->getBypass(&dspecho_bypass);
            dspflange    ->getBypass(&dspflange_bypass);

            if (channel)
            {
                result = channel->getPaused(&paused);
                if ((result != FMOD_OK) && (result != FMOD_ERR_INVALID_HANDLE) && (result != FMOD_ERR_CHANNEL_STOLEN))
                {
                    ERRCHECK(result);
                }
            }

            Common_Draw("==================================================");
            Common_Draw("Effects Example.");
            Common_Draw("Copyright (c) Firelight Technologies 2004-2015.");
            Common_Draw("==================================================");
            Common_Draw("");
            Common_Draw("Press %s to pause/unpause sound", Common_BtnStr(BTN_MORE));
            Common_Draw("Press %s to toggle dsplowpass effect", Common_BtnStr(BTN_ACTION1));
            Common_Draw("Press %s to toggle dsphighpass effect", Common_BtnStr(BTN_ACTION2));
            Common_Draw("Press %s to toggle dspecho effect", Common_BtnStr(BTN_ACTION3));

int FMOD_Main()
{
    FMOD::System       *system;
    FMOD::Sound        *sound;
    FMOD::Channel      *channel;
    FMOD::DSP          *mydsp;
    FMOD::ChannelGroup *mastergroup;
    FMOD_RESULT         result;
    unsigned int        version;
    void               *extradriverdata = 0;

    Common_Init(&extradriverdata);

    /*
        Create a System object and initialize.
    */
    result = FMOD::System_Create(&system);
    ERRCHECK(result);

    result = system->getVersion(&version);
    ERRCHECK(result);

    if (version < FMOD_VERSION)
    {
        Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
    }

    result = system->init(32, FMOD_INIT_NORMAL, extradriverdata);
    ERRCHECK(result);

    result = system->createSound(Common_MediaPath("drumloop.wav"), FMOD_SOFTWARE | FMOD_LOOP_NORMAL, 0, &sound);
    ERRCHECK(result);

    result = system->playSound(sound, 0, false, &channel);
    ERRCHECK(result);

    /*
        Create the DSP effect.
    */  
    { 
        FMOD_DSP_DESCRIPTION dspdesc; 
        memset(&dspdesc, 0, sizeof(dspdesc));
        
        strncpy(dspdesc.name, "My first DSP unit", sizeof(dspdesc.name));
        dspdesc.version = 0x00010000;
        dspdesc.numinputbuffers = 1;
        dspdesc.numoutputbuffers = 1;
        dspdesc.read = myDSPCallback; 
        dspdesc.userdata = (void *)0x12345678; 

        result = system->createDSP(&dspdesc, &mydsp); 
        ERRCHECK(result); 
    } 

    /*
        Attach the DSP, inactive by default.
    */
    result = mydsp->setBypass(true);
    ERRCHECK(result);

    result = system->getMasterChannelGroup(&mastergroup);
    ERRCHECK(result);

    result = mastergroup->addDSP(0, mydsp, 0);
    ERRCHECK(result);

    /*
        Main loop.
    */
    do
    {
        bool bypass;

        Common_Update();

        result = mydsp->getBypass(&bypass);
        ERRCHECK(result);

        if (Common_BtnPress(BTN_ACTION1))
        {
            bypass = !bypass;
            
            result = mydsp->setBypass(bypass);
            ERRCHECK(result);
        }

        result = system->update();
        ERRCHECK(result);

        Common_Draw("==================================================");
        Common_Draw("Custom DSP Example.");
        Common_Draw("Copyright (c) Firelight Technologies 2004-2014.");
        Common_Draw("==================================================");
        Common_Draw("");
        Common_Draw("Press %s to toggle filter bypass", Common_BtnStr(BTN_ACTION1));
        Common_Draw("Press %s to quit", Common_BtnStr(BTN_QUIT));
        Common_Draw("");
        Common_Draw("Filter is %s", bypass ? "inactive" : "active");

        Common_Sleep(50);
//.........这里部分代码省略.........