C++ (Cpp) LPDIRECTSOUND8::GetCaps Examples

Example #1

File: DirectSound.cpp Project: u-stone/code-database

int _tmain(int argc, _TCHAR* argv[])
{
	LPDIRECTSOUND8 lpsd;
	//DirectSound基于COM,but you do not have to initilize COM, if you don't use effective DMOs
	//HRESULT hr = DirectSoundCreate8(NULL, &lpsd, NULL);
	//if (FAILED(hr)){
	//	cout << "DirectSound Create failed" << endl;
	//	return 0;
	//}
    hr = CoInitializeEx(NULL, 0);
	if (FAILED(hRes)){
		cout << "CoInitializeEx failed" << endl;
		return 0;
	}
	hr = CoCreateInstanceEx(&CLSID_DirectSound8, 
		NULL,
		CLSTX_INPROC_SERVER,
		IID_IDirectSound8,
		(LPVOID*)&lpsd);
	if (FAILED(hr)){
		cout << "CoCreateInstanceEx failed" << endl;
		return 0;
	}
	hr = lpsd->Initialize(NULL);
	if (FAILED(hr)){
		cout << "DirectSound Device Initialize failed" << endl;
		return 0;
	}
	//不设置这个，没有声音
	hr = lpsd->SetCooperativeLevel(NULL, DSSCL_PRIORITY);
	if (FAILED(hr)){
		cout << "SetCooperativeLevel Failed" << endl;
		return 0;
	}
	DSCAPS dscaps;
	dscaps.dwSize = sizeof(DSCAPS);
	hr = lpsd->GetCaps(&dscaps);//得到设备的相关参数，这一步一般不需要做
	if (FAILED(hr)){
		cout << "GetCaps failed" << endl;
		return 0;
	}
	//创建二级缓存，这个控制声音从源到目的地, source sound can come from synthesizer,another buffer,a wav file,resource
	//CreateBaseBuffer(lpsd, );

	CoUninitialize();
	return 0;
}

Example #2

File: snd_win.c Project: Jaegermeiste/quake2_322

/*
==================
SNDDMA_InitDirect

Direct-Sound support
==================
*/
sndinitstat SNDDMA_InitDirect (void)
{
	DSCAPS			dscaps;
	HRESULT			hresult;

	dma.channels = CHANNELS;
	dma.samplebits = SAMPLEBITS;

	Com_Printf( "Initializing DirectSound 8\n");

	if ( !hInstDS )
	{
		Com_Printf( "...loading dsound.dll: " );

		hInstDS = LoadLibrary("dsound.dll");
		
		if (hInstDS == NULL)
		{
			Com_Printf ("failed\n");
			return SIS_FAILURE;
		}

		Com_Printf ("ok\n");
		pDirectSoundCreate8 = GetProcAddress(hInstDS,"DirectSoundCreate8");

		if (!pDirectSoundCreate8)
		{
			Com_Printf ("*** couldn't get DirectSound 8 process address ***\n");
			return SIS_FAILURE;
		}
	}

	Com_Printf( "...creating DirectSound 8 object: " );
	while ( ( hresult = pDirectSoundCreate8( NULL, &pDS, NULL ) ) != DS_OK )
	{
		if (hresult != DSERR_ALLOCATED)
		{
			Com_Printf( "failed\n" );
			return SIS_FAILURE;
		}

		if (MessageBox (NULL,
						"The sound hardware is in use by another application.\n\n"
					    "Select Retry to try to start sound again or Cancel to run with no sound.",
						"Sound not available",
						MB_RETRYCANCEL | MB_SETFOREGROUND | MB_ICONEXCLAMATION) != IDRETRY)
		{
			Com_Printf ("failed, hardware already in use\n" );
			return SIS_NOTAVAIL;
		}
	}
	Com_Printf( "ok\n" );

	dscaps.dwSize = sizeof(dscaps);

#ifdef QDSNDCOMPILERHACK
	if ( DS_OK != pDS->lpVtbl->GetCaps( pDS, &dscaps ) )
#else
	if ( DS_OK != pDS->GetCaps( &dscaps ) )
#endif
	{
		Com_Printf ("*** couldn't get DirectSound 8 caps ***\n");
	}

	if ( dscaps.dwFlags & DSCAPS_EMULDRIVER )
	{
		Com_Printf ("...no DirectSound 8 driver found\n" );
		FreeSound();
		return SIS_FAILURE;
	}

	if ( !DS_CreateBuffers() )
		return SIS_FAILURE;

	dsound_init = 1;

	Com_Printf("...completed successfully\n" );

	return SIS_SUCCESS;
}