bool SoundStream::FillAndPushBuffer(unsigned int bufferNum)
{
bool requestStop = false;
// Acquire audio data
Chunk data = {NULL, 0};
if (!OnGetData(data))
{
// Mark the buffer as the last one (so that we know when to reset the playing position)
myEndBuffers[bufferNum] = true;
// Check if the stream must loop or stop
if (myLoop)
{
// Return to the beginning of the stream source
OnSeek(0);
// If we previously had no data, try to fill the buffer once again
if (!data.Samples || (data.SampleCount == 0))
{
return FillAndPushBuffer(bufferNum);
}
}
else
{
// Not looping: request stop
requestStop = true;
}
}
// Fill the buffer if some data was returned
if (data.Samples && data.SampleCount)
{
unsigned int buffer = myBuffers[bufferNum];
// Fill the buffer
ALsizei size = static_cast<ALsizei>(data.SampleCount) * sizeof(Int16);
ALCheck(alBufferData(buffer, myFormat, data.Samples, size, mySampleRate));
// Push it into the sound queue
ALCheck(alSourceQueueBuffers(mySource, 1, &buffer));
}
return requestStop;
}
////////////////////////////////////////////////////////////
/// Fill a new buffer with audio data, and push it to the
/// playing queue
////////////////////////////////////////////////////////////
bool SoundStream::FillAndPushBuffer(unsigned int BufferNum)
{
bool RequestStop = false;
// Acquire audio data
Chunk Data = {NULL, 0};
if (!OnGetData(Data))
{
// Mark the buffer as the last one (so that we know when to reset the playing position)
myEndBuffers[BufferNum] = true;
// Check if the stream must loop or stop
if (myLoop && OnStart())
{
// If we succeeded to restart and we previously had no data, try to fill the buffer once again
if (!Data.Samples || (Data.NbSamples == 0))
{
return FillAndPushBuffer(BufferNum);
}
}
else
{
// Not looping or restart failed: request stop
RequestStop = true;
}
}
// Fill the buffer if some data was returned
if (Data.Samples && Data.NbSamples)
{
unsigned int Buffer = myBuffers[BufferNum];
// Fill the buffer
ALsizei Size = static_cast<ALsizei>(Data.NbSamples) * sizeof(Int16);
ALCheck(alBufferData(Buffer, myFormat, Data.Samples, Size, mySampleRate));
// Push it into the sound queue
ALCheck(alSourceQueueBuffers(Sound::mySource, 1, &Buffer));
}
return RequestStop;
}
////////////////////////////////////////////////////////////
/// Fill a new buffer with audio data, and push it to the
/// playing queue
////////////////////////////////////////////////////////////
bool SoundStream::FillAndPushBuffer(unsigned int Buffer)
{
bool RequestStop = false;
// Acquire audio data
Chunk Data = {NULL, 0};
if (!OnGetData(Data))
RequestStop = true;
// Create and fill the buffer, and push it to the queue
if (Data.Samples && Data.NbSamples)
{
// Fill the buffer
ALsizei Size = static_cast<ALsizei>(Data.NbSamples) * sizeof(Int16);
ALCheck(alBufferData(Buffer, myFormat, Data.Samples, Size, mySampleRate));
// Push it into the sound queue
ALCheck(alSourceQueueBuffers(Sound::mySource, 1, &Buffer));
}
return RequestStop;
}
// Implementation of GetData
STDMETHODIMP CSimpleDataObjectImpl::GetData(FORMATETC* pformatetc, STGMEDIUM* pmedium)
{
// Check format etc
if (pformatetc->dwAspect!=DVASPECT_CONTENT) return DV_E_DVASPECT;
#ifdef _DEBUG
TCHAR szFormat[MAX_PATH];
if (!GetClipboardFormatName(pformatetc->cfFormat, szFormat, MAX_PATH))
{
wsprintf(szFormat, _T("%i"), pformatetc->cfFormat);
}
ATLTRACE(_T("CSimpleDataObjectImpl::GetData - %s %i\n"), szFormat, pformatetc->tymed);
#endif
// Get the format...
CFormat* pFormat=FindFormat(pformatetc->cfFormat, (TYMED)pformatetc->tymed);
if (!pFormat)
return DATA_E_FORMATETC;
// Init STGMEDIUM
memset(pmedium, 0, sizeof(*pmedium));
if (pformatetc->tymed & TYMED_HGLOBAL)
{
// Delayed data?
if (!pFormat->m_hData)
{
if (SUCCEEDED(OnGetData(pformatetc->cfFormat, pformatetc->lindex, &pmedium->hGlobal)))
{
pmedium->tymed=TYMED_HGLOBAL;
return S_OK;
}
}
else if (pformatetc->lindex==-1)
{
// Allocate memory
DWORD_PTR dwSize=GlobalSize(pFormat->m_hData);
pmedium->hGlobal=GlobalAlloc(GHND, dwSize);
if (!pmedium->hGlobal)
return E_OUTOFMEMORY;
// Copy it
memcpy(GlobalLock(pmedium->hGlobal), GlobalLock(pFormat->m_hData), dwSize);
// Unlock
GlobalUnlock(pmedium->hGlobal);
GlobalUnlock(pFormat->m_hData);
pmedium->tymed=TYMED_HGLOBAL;
return S_OK;
}
}
if (pformatetc->tymed & TYMED_ISTREAM)
{
// Delayed data?
if (!pFormat->m_spStream)
{
if (SUCCEEDED(OnGetData(pformatetc->cfFormat, pformatetc->lindex, &pmedium->pstm)))
{
pmedium->tymed=TYMED_ISTREAM;
return S_OK;
}
}
else if (pformatetc->lindex==-1)
{
pFormat->m_spStream.CopyTo(&pmedium->pstm);
pmedium->tymed=TYMED_ISTREAM;
return S_OK;
}
}
// Unknown format
return DATA_E_FORMATETC;
}
