自学教程：C++ IDirectSound_SetCooperativeLevel函数代码示例

static ALCboolean DSoundOpenPlayback(ALCdevice *device, const ALCchar *deviceName){    DSoundData *pData = NULL;    LPGUID guid = NULL;    HRESULT hr;    if(!DSoundLoad())        return ALC_FALSE;    if(!deviceName)        deviceName = dsDevice;    else if(strcmp(deviceName, dsDevice) != 0)    {        ALuint i;        if(!DeviceList)        {            hr = pDirectSoundEnumerateA(DSoundEnumDevices, NULL);            if(FAILED(hr))                AL_PRINT("Error enumerating DirectSound devices (%#x)!/n", (unsigned int)hr);        }        for(i = 0; i < NumDevices; i++)        {            if(strcmp(deviceName, DeviceList[i].name) == 0)            {                if(i > 0)                    guid = &DeviceList[i].guid;                break;            }        }        if(i == NumDevices)            return ALC_FALSE;    }    //Initialise requested device    pData = calloc(1, sizeof(DSoundData));    if(!pData)    {        alcSetError(device, ALC_OUT_OF_MEMORY);        return ALC_FALSE;    }    //DirectSound Init code    hr = pDirectSoundCreate(guid, &pData->lpDS, NULL);    if(SUCCEEDED(hr))        hr = IDirectSound_SetCooperativeLevel(pData->lpDS, GetForegroundWindow(), DSSCL_PRIORITY);    if(FAILED(hr))    {        if(pData->lpDS)            IDirectSound_Release(pData->lpDS);        free(pData);        AL_PRINT("Device init failed: 0x%08lx/n", hr);        return ALC_FALSE;    }    device->szDeviceName = strdup(deviceName);    device->ExtraData = pData;    return ALC_TRUE;}

static gbooleangst_directsound_sink_open (GstAudioSink * asink){  GstDirectSoundSink *dsoundsink;  HRESULT hRes;  dsoundsink = GST_DIRECTSOUND_SINK (asink);  /* create and initialize a DirecSound object */  if (FAILED (hRes = DirectSoundCreate (NULL, &dsoundsink->pDS, NULL))) {    GST_ELEMENT_ERROR (dsoundsink, RESOURCE, OPEN_READ,        ("gst_directsound_sink_open: DirectSoundCreate: %s",            DXGetErrorString9 (hRes)), (NULL));    return FALSE;  }  if (FAILED (hRes = IDirectSound_SetCooperativeLevel (dsoundsink->pDS,              GetDesktopWindow (), DSSCL_PRIORITY))) {    GST_ELEMENT_ERROR (dsoundsink, RESOURCE, OPEN_READ,        ("gst_directsound_sink_open: IDirectSound_SetCooperativeLevel: %s",            DXGetErrorString9 (hRes)), (NULL));    return FALSE;  }  return TRUE;}

static voidFreeSound (void){	if (pDSBuf) {		IDirectSoundBuffer_Stop (pDSBuf);		IDirectSound_Release (pDSBuf);	}// release primary buffer only if it's not also the mixing buffer we just released	if (pDSPBuf && (pDSBuf != pDSPBuf)) {		IDirectSound_Release (pDSPBuf);	}	if (pDS) {		IDirectSound_SetCooperativeLevel (pDS, mainwindow, DSSCL_NORMAL);		IDirectSound_Release (pDS);	}	pDS = NULL;	pDSBuf = NULL;	pDSPBuf = NULL;	hWaveOut = 0;	hData = 0;	hWaveHdr = 0;	lpData = NULL;	lpWaveHdr = NULL;}

void m1sdr_PlayStart(void){	waveLogStart();	IDirectSound_SetCooperativeLevel(lpDS, GetForegroundWindow(), DSSCL_PRIORITY);		IDirectSoundBuffer_SetCurrentPosition(lpSecB, 0);	IDirectSoundBuffer_Play(lpSecB, 0, 0, DSBPLAY_LOOPING);}

static ALCboolean DSoundOpenPlayback(ALCdevice *device, const ALCchar *deviceName){    DSoundData *pData = NULL;    LPGUID guid = NULL;    HRESULT hr;    if(!deviceName)        deviceName = dsDevice;    else if(strcmp(deviceName, dsDevice) != 0)    {        ALuint i;        for(i = 0;i < NumDevices;i++)        {            if(strcmp(deviceName, DeviceList[i].name) == 0)            {                guid = &DeviceList[i].guid;                break;            }        }        if(i == NumDevices)            return ALC_FALSE;    }    DSoundLoad();    if(ds_handle == NULL)        return ALC_FALSE;    //Initialise requested device    pData = calloc(1, sizeof(DSoundData));    if(!pData)    {        alcSetError(ALC_OUT_OF_MEMORY);        DSoundUnload();        return ALC_FALSE;    }    //DirectSound Init code    hr = pDirectSoundCreate(guid, &pData->lpDS, NULL);    if(SUCCEEDED(hr))        hr = IDirectSound_SetCooperativeLevel(pData->lpDS, GetForegroundWindow(), DSSCL_PRIORITY);    if(FAILED(hr))    {        if(pData->lpDS)            IDirectSound_Release(pData->lpDS);        free(pData);        DSoundUnload();        return ALC_FALSE;    }    device->szDeviceName = strdup(deviceName);    device->ExtraData = pData;    return ALC_TRUE;}

/*	FreeSound*/voidFreeSound (void){	int         i;	if (pDSBuf) {		IDirectSoundBuffer_Stop (pDSBuf);		IDirectSound_Release (pDSBuf);	}// only release primary buffer if it's not also the mixing buffer we just released	if (pDSPBuf && (pDSBuf != pDSPBuf)) {		IDirectSound_Release (pDSPBuf);	}	if (pDS) {		IDirectSound_SetCooperativeLevel (pDS, mainwindow, DSSCL_NORMAL);		IDirectSound_Release (pDS);	}	if (hWaveOut) {		waveOutReset (hWaveOut);		if (lpWaveHdr) {			for (i = 0; i < WAV_BUFFERS; i++)				waveOutUnprepareHeader (hWaveOut, lpWaveHdr + i,										sizeof (WAVEHDR));		}		waveOutClose (hWaveOut);		if (hWaveHdr) {			GlobalUnlock (hWaveHdr);			GlobalFree (hWaveHdr);		}		if (hData) {			GlobalUnlock (hData);			GlobalFree (hData);		}	}	pDS = NULL;	pDSBuf = NULL;	pDSPBuf = NULL;	hWaveOut = 0;	hData = 0;	hWaveHdr = 0;	lpData = NULL;	lpWaveHdr = NULL;	dsound_init = false;	wav_init = false;}

BOOL SSInit(HWND hWnd, int channels, unsigned flags){	LPDIRECTSOUNDBUFFER lpPrimaryBuffer;	LPDIRECTSOUND lpDS;	DSBUFFERDESC dsbd;	if (SSMixer.lpds) return TRUE;//	Perform Direct Sound Initialization	if (DirectSoundCreate(NULL, &lpDS, NULL) != DS_OK) 		return FALSE;	SSMixer.lpds = lpDS;	if (IDirectSound_SetCooperativeLevel(lpDS, hWnd, DSSCL_NORMAL) != DS_OK) {		SSDestroy();		return FALSE;	}//	Start Mixer	memset(&dsbd, 0, sizeof(DSBUFFERDESC));	dsbd.dwSize = sizeof(DSBUFFERDESC);	dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;	if (IDirectSound_CreateSoundBuffer(SSMixer.lpds, &dsbd, &lpPrimaryBuffer, NULL) == DS_OK) {		if (IDirectSoundBuffer_Play(lpPrimaryBuffer, 0, 0, DSBPLAY_LOOPING) != DS_OK) {			IDirectSoundBuffer_Release(lpPrimaryBuffer);			SSDestroy();			return FALSE;		}		IDirectSoundBuffer_Release(lpPrimaryBuffer);	}	else {		SSDestroy();		return FALSE;	}//	Finish initializing SSMixer.	SSMixer.ch_cur = 0;	SSMixer.ch_list = (SSoundBuffer *)malloc(sizeof(SSoundBuffer)*channels);	if (!SSMixer.ch_list) return FALSE;		memset(SSMixer.ch_list, 0, sizeof(SSoundBuffer)*channels);		SSMixer.ch_num = channels;//	Determine Sound technology and volume caps	waveOutGetVolume((HWAVEOUT)WAVE_MAPPER, (LPDWORD)&SSMixer.old_master_vol);//	waveOutSetVolume((HWAVEOUT)WAVE_MAPPER, 0x40004000);	return TRUE;}

int pest_open( HWND win ){	HMODULE lib;	DIRECTSOUNDCREATE dsound_create;	WAVEFORMATEX format;	DSBUFFERDESC desc_primary, desc_secondary;	lib = (HMODULE)LoadLibrary("dsound.dll");	if(lib==NULL) return FALSE;	dsound_create = (DIRECTSOUNDCREATE)GetProcAddress(lib, "DirectSoundCreate");	if(dsound_create==NULL) return FALSE;	FreeLibrary(lib);	if( dsound_create( NULL, &dsound, NULL )!= DS_OK ) return FALSE;	if( IDirectSound_SetCooperativeLevel( dsound, win, DSSCL_EXCLUSIVE | DSSCL_PRIORITY ) != DS_OK ) return FALSE;	memset( &desc_primary, 0, sizeof(DSBUFFERDESC) );	desc_primary.dwSize = sizeof(DSBUFFERDESC);	desc_primary.dwFlags = DSBCAPS_PRIMARYBUFFER | DSBCAPS_STICKYFOCUS;		if(IDirectSound_CreateSoundBuffer( dsound, &desc_primary, &primary, NULL )!=DS_OK) return FALSE;	memset( &format, 0, sizeof(WAVEFORMATEX) );	format.wFormatTag = WAVE_FORMAT_PCM;	format.nChannels = 2;	format.nSamplesPerSec = 44100;	format.nAvgBytesPerSec = 44100 * 4;	format.nBlockAlign = 4;	format.wBitsPerSample = 16;	if( IDirectSoundBuffer_SetFormat( primary, &format )!= DS_OK) return FALSE;	memset( &desc_secondary, 0, sizeof(DSBUFFERDESC) );	desc_secondary.dwSize = sizeof(DSBUFFERDESC);	desc_secondary.dwFlags = DSBCAPS_GLOBALFOCUS | DSBCAPS_GETCURRENTPOSITION2;	desc_secondary.lpwfxFormat = &format;	desc_secondary.dwBufferBytes = 2*2*BUFFER_LEN;	if(IDirectSound_CreateSoundBuffer( dsound, &desc_secondary, &secondary, NULL )!=DS_OK) return FALSE;	InitializeCriticalSection(&critical);	return TRUE;}

int DirectSoundInit(){   HRESULT hr;   HWND hWnd;	LoadDsound();	   hr = pDirectSoundCreate(NULL, &lpDirectSound, NULL);   if( hr != DS_OK ) 	   return 0;   hWnd = GetForegroundWindow();   // establecer el nivel de cooperacion   hr = IDirectSound_SetCooperativeLevel(lpDirectSound,hWnd, DSSCL_NORMAL );   if( hr != DS_OK)		return 0;   return 1; }

/* * DirectSoundを初期化する */BOOL DSInitialize(HWND hWnd){	HRESULT hRet;	uintptr_t t;	/* IDirectSoundのインスタンスを取得して初期化する */	hRet = CoCreateInstance(&CLSID_DirectSound,							NULL,							CLSCTX_INPROC_SERVER,							&IID_IDirectSound,							(void **)&pDS);	if(hRet != S_OK || pDS == NULL)		return FALSE;	/* COMオブジェクトを初期化する */	IDirectSound_Initialize(pDS, NULL);	/* 
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