HRESULT CDelay::InternalAllocateStreamingResources()
{
AtlTrace("InternalAllocateStreamingResources()\n");
_ASSERTE(InputType(0)->formattype == FORMAT_WaveFormatEx);
_ASSERTE(m_dwDelay > 0);
m_pWave = (WAVEFORMATEX*)InputType(0)->pbFormat;
// Allocate the buffer that holds the delayed samples
m_cbDelayBuffer = (m_dwDelay * m_pWave->nSamplesPerSec * m_pWave->nBlockAlign) / 1000;
m_pbDelayBuffer = (BYTE*)CoTaskMemAlloc(m_cbDelayBuffer);
if (m_pbDelayBuffer == NULL)
{
return E_OUTOFMEMORY;
}
FillBufferWithSilence();
m_pbDelayPtr = m_pbDelayBuffer;
AtlTrace("\tAllocated %d byte buffer.\n", m_cbDelayBuffer);
DumpWaveformat(m_pWave);
return S_OK;
}
HRESULT CDelay::InternalFlush()
{
AtlTrace("InternalFlush()\n");
m_pBuffer = NULL;
if (m_pbDelayBuffer)
{
FillBufferWithSilence();
}
return S_OK;
}
void SetupDSoundBuffers(void) {
LPDIRECTSOUNDBUFFER lpdsb;
DSBUFFERDESC dsPrimaryBuff, dsbdesc;
WAVEFORMATEX wfm;
HRESULT hr;
int count;
if (lpdsbuf) { CloseDLL(); InitiateAudio(AudioInfo);}
if ( FAILED( hr = DirectSoundCreate( NULL, &lpds, NULL ) ) ) {
return FALSE;
}
if ( FAILED( hr = IDirectSound8_SetCooperativeLevel(lpds, AudioInfo.hwnd, DSSCL_PRIORITY ))) {
return FALSE;
}
for ( count = 0; count < NUMCAPTUREEVENTS; count++ ) {
rghEvent[count] = CreateEvent( NULL, FALSE, FALSE, NULL );
if (rghEvent[count] == NULL ) { return FALSE; }
}
memset( &dsPrimaryBuff, 0, sizeof( DSBUFFERDESC ) );
dsPrimaryBuff.dwSize = sizeof( DSBUFFERDESC );
dsPrimaryBuff.dwFlags = DSBCAPS_PRIMARYBUFFER;
dsPrimaryBuff.dwBufferBytes = 0;
dsPrimaryBuff.lpwfxFormat = NULL;
memset( &wfm, 0, sizeof( WAVEFORMATEX ) );
wfm.wFormatTag = WAVE_FORMAT_PCM;
wfm.nChannels = 2;
wfm.nSamplesPerSec = 44100;
wfm.wBitsPerSample = 16;
wfm.nBlockAlign = wfm.wBitsPerSample / 8 * wfm.nChannels;
wfm.nAvgBytesPerSec = wfm.nSamplesPerSec * wfm.nBlockAlign;
hr = IDirectSound8_CreateSoundBuffer(lpds,&dsPrimaryBuff, &lpdsb, NULL);
if (SUCCEEDED ( hr ) ) {
IDirectSoundBuffer8_SetFormat(lpdsb, &wfm );
IDirectSoundBuffer8_Play(lpdsb, 0, 0, DSBPLAY_LOOPING );
}
wfm.nSamplesPerSec = Frequency;
wfm.wBitsPerSample = 16;
wfm.nBlockAlign = wfm.wBitsPerSample / 8 * wfm.nChannels;
wfm.nAvgBytesPerSec = wfm.nSamplesPerSec * wfm.nBlockAlign;
memset( &dsbdesc, 0, sizeof( DSBUFFERDESC ) );
dsbdesc.dwSize = sizeof( DSBUFFERDESC );
dsbdesc.dwFlags = DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLPOSITIONNOTIFY;
dsbdesc.dwBufferBytes = BufferSize * 3;
dsbdesc.lpwfxFormat = &wfm;
if ( FAILED( hr = IDirectSound8_CreateSoundBuffer(lpds, &dsbdesc, &lpdsbuf, NULL ) ) ) {
DisplayError("Failed in creation of Play buffer 1");
}
FillBufferWithSilence( lpdsbuf );
rgdscbpn[0].dwOffset = ( BufferSize ) - 1;
rgdscbpn[0].hEventNotify = rghEvent[0];
rgdscbpn[1].dwOffset = ( BufferSize * 2) - 1;
rgdscbpn[1].hEventNotify = rghEvent[1];
rgdscbpn[2].dwOffset = ( BufferSize * 3) - 1;
rgdscbpn[2].hEventNotify = rghEvent[2];
rgdscbpn[3].dwOffset = DSBPN_OFFSETSTOP;
rgdscbpn[3].hEventNotify = rghEvent[3];
if ( FAILED( hr = IDirectSound8_QueryInterface(lpdsbuf, &IID_IDirectSoundNotify, ( VOID ** )&lpdsNotify ) ) ) {
DisplayError("IDirectSound8_QueryInterface: Failed\n");
return;
}
// Set capture buffer notifications.
if ( FAILED( hr = IDirectSoundNotify_SetNotificationPositions(lpdsNotify, NUMCAPTUREEVENTS, rgdscbpn ) ) ) {
DisplayError("IDirectSoundNotify_SetNotificationPositions: Failed");
return;
}
//AddEffect();
}
