//-----------------------------------------------------------------------------
// Создание Direct Sound объекта
// на входе : window - идентификатор окна
// clsid_direct - идентификатор Direct Sound
// device - идентификатор устройства воспроизведения
// level - уровень кооперации
// на выходе : указатель на созданный Direct Sound объект, если значение
// равно 0 значит создание не состоялось
//-----------------------------------------------------------------------------
LPDIRECTSOUND ds_Create(HWND window, REFCLSID clsid_direct, LPGUID device,
int level)
{
// установка переменных
LPDIRECTSOUND direct = 0;
// Инициализация COM
CoInitialize(NULL);
// Создание Direct Sound обьекта
if (CoCreateInstance(clsid_direct,
NULL,
CLSCTX_INPROC_SERVER,
IID_IDirectSound,
(void * *) &direct) != DS_OK)
return false;
// инициализация устройства воспроизведения
if (direct->Initialize(device) != DS_OK)
return false;
// установка приоритетного режима
if (direct->SetCooperativeLevel(window, level) != DS_OK)
return false;
return direct;
}
HRESULT STDMETHODCALLTYPE DirectSound::Initialize(LPCGUID pcGuidDevice)
{
return m_ds->Initialize(pcGuidDevice);
}
int SNDDMA_InitDS ()
{
HRESULT hresult;
DSBUFFERDESC dsbuf;
DSBCAPS dsbcaps;
WAVEFORMATEX format;
int use8;
Com_Printf( "Initializing DirectSound\n");
use8 = 1;
// Create IDirectSound using the primary sound device
if( FAILED( hresult = CoCreateInstance(CLSID_DirectSound8, NULL, CLSCTX_INPROC_SERVER, IID_IDirectSound8, (void **)&pDS))) {
use8 = 0;
if( FAILED( hresult = CoCreateInstance(CLSID_DirectSound, NULL, CLSCTX_INPROC_SERVER, IID_IDirectSound, (void **)&pDS))) {
Com_Printf ("failed\n");
SNDDMA_Shutdown ();
return qfalse;
}
}
hresult = pDS->Initialize( NULL);
Com_DPrintf( "ok\n" );
Com_DPrintf("...setting DSSCL_PRIORITY coop level: " );
if ( DS_OK != pDS->SetCooperativeLevel( g_wv.hWnd, DSSCL_PRIORITY ) ) {
Com_Printf ("failed\n");
SNDDMA_Shutdown ();
return qfalse;
}
Com_DPrintf("ok\n" );
// create the secondary buffer we'll actually work with
dma.channels = 2;
dma.samplebits = 16;
if (s_khz->integer == 44)
dma.speed = 44100;
else if (s_khz->integer == 22)
dma.speed = 22050;
else
dma.speed = 11025;
memset (&format, 0, sizeof(format));
format.wFormatTag = WAVE_FORMAT_PCM;
format.nChannels = dma.channels;
format.wBitsPerSample = dma.samplebits;
format.nSamplesPerSec = dma.speed;
format.nBlockAlign = format.nChannels * format.wBitsPerSample / 8;
format.cbSize = 0;
format.nAvgBytesPerSec = format.nSamplesPerSec*format.nBlockAlign;
memset (&dsbuf, 0, sizeof(dsbuf));
dsbuf.dwSize = sizeof(DSBUFFERDESC);
// Micah: take advantage of 2D hardware.if available.
dsbuf.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_LOCHARDWARE;
if (use8) {
dsbuf.dwFlags |= DSBCAPS_GETCURRENTPOSITION2;
}
//#define idDSBCAPS_GETCURRENTPOSITION2 0x00010000
dsbuf.dwBufferBytes = SECONDARY_BUFFER_SIZE;
dsbuf.lpwfxFormat = &format;
memset(&dsbcaps, 0, sizeof(dsbcaps));
dsbcaps.dwSize = sizeof(dsbcaps);
Com_DPrintf( "...creating secondary buffer: " );
if (DS_OK == pDS->CreateSoundBuffer(&dsbuf, &pDSBuf, NULL)) {
Com_Printf( "locked hardware. ok\n" );
}
else {
// Couldn't get hardware, fallback to software.
dsbuf.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_LOCSOFTWARE;
if (use8) {
dsbuf.dwFlags |= DSBCAPS_GETCURRENTPOSITION2;
}
if (DS_OK != pDS->CreateSoundBuffer(&dsbuf, &pDSBuf, NULL)) {
Com_Printf( "failed\n" );
SNDDMA_Shutdown ();
return qfalse;
}
Com_DPrintf( "forced to software. ok\n" );
}
// Make sure mixer is active
if ( DS_OK != pDSBuf->Play(0, 0, DSBPLAY_LOOPING) ) {
Com_Printf ("*** Looped sound play failed ***\n");
SNDDMA_Shutdown ();
return qfalse;
}
// get the returned buffer size
if ( DS_OK != pDSBuf->GetCaps (&dsbcaps) ) {
Com_Printf ("*** GetCaps failed ***\n");
SNDDMA_Shutdown ();
return qfalse;
}
gSndBufSize = dsbcaps.dwBufferBytes;
dma.channels = format.nChannels;
dma.samplebits = format.wBitsPerSample;
dma.speed = format.nSamplesPerSec;
dma.samples = gSndBufSize/(dma.samplebits/8);
dma.submission_chunk = 1;
dma.buffer = NULL; // must be locked first
sample16 = (dma.samplebits/8) - 1;
SNDDMA_BeginPainting ();
if (dma.buffer)
memset(dma.buffer, 0, dma.samples * dma.samplebits/8);
SNDDMA_Submit ();
return 1;
}
