/*
===============
idAudioHardwareWIN32::SetPrimaryBufferFormat
Set primary buffer to a specified format
For example, to set the primary buffer format to 22kHz stereo, 16-bit
then: dwPrimaryChannels = 2
dwPrimaryFreq = 22050,
dwPrimaryBitRate = 16
===============
*/
void idAudioHardwareWIN32::SetPrimaryBufferFormat(dword dwPrimaryFreq, dword dwPrimaryBitRate, dword dwSpeakers)
{
HRESULT hr;
if (m_pDS == NULL) {
return;
}
ulong cfgSpeakers;
m_pDS->GetSpeakerConfig(&cfgSpeakers);
DSCAPS dscaps;
dscaps.dwSize = sizeof(DSCAPS);
m_pDS->GetCaps(&dscaps);
if (dscaps.dwFlags & DSCAPS_EMULDRIVER) {
return;
}
// Get the primary buffer
DSBUFFERDESC dsbd;
ZeroMemory(&dsbd, sizeof(DSBUFFERDESC));
dsbd.dwSize = sizeof(DSBUFFERDESC);
dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
dsbd.dwBufferBytes = 0;
dsbd.lpwfxFormat = NULL;
// Obtain write-primary cooperative level.
if (FAILED(hr = m_pDS->SetCooperativeLevel(win32.hWnd, DSSCL_PRIORITY))) {
DXTRACE_ERR(TEXT("SetPrimaryBufferFormat"), hr);
return;
}
if (FAILED(hr = m_pDS->CreateSoundBuffer(&dsbd, &pDSBPrimary, NULL))) {
return;
}
if (dwSpeakers == 6 && (cfgSpeakers == DSSPEAKER_5POINT1 || cfgSpeakers == DSSPEAKER_SURROUND)) {
WAVEFORMATEXTENSIBLE waveFormatPCMEx;
ZeroMemory(&waveFormatPCMEx, sizeof(WAVEFORMATEXTENSIBLE));
waveFormatPCMEx.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
waveFormatPCMEx.Format.nChannels = 6;
waveFormatPCMEx.Format.nSamplesPerSec = dwPrimaryFreq;
waveFormatPCMEx.Format.wBitsPerSample = (WORD) dwPrimaryBitRate;
waveFormatPCMEx.Format.nBlockAlign = waveFormatPCMEx.Format.wBitsPerSample / 8 * waveFormatPCMEx.Format.nChannels;
waveFormatPCMEx.Format.nAvgBytesPerSec = waveFormatPCMEx.Format.nSamplesPerSec * waveFormatPCMEx.Format.nBlockAlign;
waveFormatPCMEx.dwChannelMask = KSAUDIO_SPEAKER_5POINT1;
// SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT |
// SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY |
// SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT
waveFormatPCMEx.SubFormat = KSDATAFORMAT_SUBTYPE_PCM; // Specify PCM
waveFormatPCMEx.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE);
waveFormatPCMEx.Samples.wValidBitsPerSample = 16;
if (FAILED(hr = pDSBPrimary->SetFormat((WAVEFORMATEX *)&waveFormatPCMEx))) {
DXTRACE_ERR(TEXT("SetPrimaryBufferFormat"), hr);
return;
}
numSpeakers = 6; // force it to think 5.1
blockAlign = waveFormatPCMEx.Format.nBlockAlign;
} else {
if (dwSpeakers == 6) {
common->Printf("sound: hardware reported unable to use multisound, defaulted to stereo\n");
}
WAVEFORMATEX wfx;
ZeroMemory(&wfx, sizeof(WAVEFORMATEX));
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nChannels = 2;
wfx.nSamplesPerSec = dwPrimaryFreq;
wfx.wBitsPerSample = (WORD) dwPrimaryBitRate;
wfx.nBlockAlign = wfx.wBitsPerSample / 8 * wfx.nChannels;
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;
wfx.cbSize = sizeof(WAVEFORMATEX);
if (FAILED(hr = pDSBPrimary->SetFormat(&wfx))) {
return;
}
numSpeakers = 2; // force it to think stereo
blockAlign = wfx.nBlockAlign;
}
byte *speakerData;
bufferSize = MIXBUFFER_SAMPLES * sizeof(word) * numSpeakers * ROOM_SLICES_IN_BUFFER;
speakerData = (byte *)Mem_Alloc(bufferSize);
memset(speakerData, 0, bufferSize);
InitializeSpeakers(speakerData, bufferSize, dwPrimaryFreq, dwPrimaryBitRate, numSpeakers);
}
HRESULT STDMETHODCALLTYPE DirectSound::GetSpeakerConfig(LPDWORD pdwSpeakerConfig)
{
return m_ds->GetSpeakerConfig(pdwSpeakerConfig);
}
