AVObjects Library: Samples
From AVObjects Knowledge Base
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| + | <!--SORT=3--> | ||
| + | {{This|avobjects_library/samples.html}} | ||
| + | |||
TODO: Samples | TODO: Samples | ||
| − | [[Category:AVObjects | + | == == |
| + | <source lang=cpp> | ||
| + | HRESULT CMuxedPCM::ReadFrame(ULONGLONG ullFrame, BYTE* pbFrame, DWORD cbFrame, DWORD* pcbActual, | ||
| + | LONG* plTempOffset/* = NULL*/, bool bReverse/* = false*/,DWORD nSkip /*= 0*/, bool bDirectRead/* = false*/) | ||
| + | { | ||
| + | ATLASSERT(pbFrame != NULL); | ||
| + | if(pbFrame == NULL) return E_INVALIDARG; | ||
| + | ATLASSERT(pcbActual != NULL); | ||
| + | if(pcbActual == NULL) return E_INVALIDARG; | ||
| + | |||
| + | DWORD cbFrameSize = GetFrameSize(); | ||
| + | ATLASSERT(cbFrame >= cbFrameSize); | ||
| + | if(cbFrame < cbFrameSize) return E_INVALIDARG; | ||
| + | |||
| + | DWORD dwSourceCount = m_source.GetSize(); | ||
| + | ATLASSERT(dwSourceCount > 0); | ||
| + | |||
| + | if (dwSourceCount == 1) | ||
| + | return m_source[0]->ReadFrame(ullFrame, pbFrame, cbFrame, pcbActual, plTempOffset, bReverse, nSkip, bDirectRead); | ||
| + | |||
| + | CMType mt; | ||
| + | HRESULT hr = FillMT(mt); | ||
| + | if (hr != S_OK) | ||
| + | return hr; | ||
| + | |||
| + | ATLASSERT(mt.IsAudio()); | ||
| + | const WAVEFORMATEX* pwf = mt; | ||
| + | |||
| + | |||
| + | DWORD cbBuf = cbFrame / dwSourceCount; | ||
| + | CMAlloc mem; | ||
| + | if (!mem.Alloc(cbBuf)) | ||
| + | return hr; | ||
| + | |||
| + | BYTE* pbBuf = mem.Memory(); | ||
| + | ATLASSERT(pbBuf); | ||
| + | |||
| + | DWORD nBlockAlign = pwf->nBlockAlign / dwSourceCount; | ||
| + | *pcbActual = 0; | ||
| + | |||
| + | // ATLTRACE2(atlTraceGeneral, 2, _T("%s::ReadFrame(): ") | ||
| + | // _T("MuxedReadStart: ullFrame = %I64u(0x%I64x), cbFrame = %d(0x%x)\n"), GetClassName(), ullFrame, ullFrame, | ||
| + | // cbFrame, cbFrame); | ||
| + | |||
| + | memset(pbFrame, 0, cbFrame); | ||
| + | for(DWORD n = 0; n < dwSourceCount; n++) | ||
| + | { | ||
| + | DWORD cbActual = 0; | ||
| + | hr = m_source[n]->ReadFrame(ullFrame, pbBuf, cbBuf, &cbActual, NULL, bReverse, nSkip, bDirectRead); | ||
| + | if (hr != S_OK) | ||
| + | return hr; | ||
| + | |||
| + | if (cbActual > *pcbActual) | ||
| + | *pcbActual = cbActual; | ||
| + | |||
| + | BYTE* pbIn = pbBuf; | ||
| + | BYTE* pbOut = pbFrame + nBlockAlign * n; | ||
| + | BYTE* pbEnd = pbBuf + cbActual; | ||
| + | for(; pbIn < pbEnd; pbIn += nBlockAlign, pbOut += pwf->nBlockAlign) | ||
| + | { | ||
| + | //DWORD cbLen = (pbIn + nBlockAlign >= pbEnd)? pbEnd - pbIn : nBlockAlign; | ||
| + | memcpy(pbOut, pbIn, nBlockAlign); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | *pcbActual *= dwSourceCount; | ||
| + | // ATLTRACE2(atlTraceGeneral, 2, _T("%s::ReadFrame(): ") | ||
| + | // _T("MuxedReadAStop Actual: %d(0x%x)\n"), GetClassName(), *pcbActual, *pcbActual); | ||
| + | // Debug_Dump(atlTraceGeneral, 2, *pcbActual, pbFrame); | ||
| + | |||
| + | return S_OK; | ||
| + | }; | ||
| + | </source> | ||
| + | [[Category:AVObjects Library]] | ||
Latest revision as of 11:28, 15 July 2014
This page is a copy of the original page on the AVObjects' web site and can also be viewed here.
TODO: Samples
HRESULT CMuxedPCM::ReadFrame(ULONGLONG ullFrame, BYTE* pbFrame, DWORD cbFrame, DWORD* pcbActual, LONG* plTempOffset/* = NULL*/, bool bReverse/* = false*/,DWORD nSkip /*= 0*/, bool bDirectRead/* = false*/) { ATLASSERT(pbFrame != NULL); if(pbFrame == NULL) return E_INVALIDARG; ATLASSERT(pcbActual != NULL); if(pcbActual == NULL) return E_INVALIDARG; DWORD cbFrameSize = GetFrameSize(); ATLASSERT(cbFrame >= cbFrameSize); if(cbFrame < cbFrameSize) return E_INVALIDARG; DWORD dwSourceCount = m_source.GetSize(); ATLASSERT(dwSourceCount > 0); if (dwSourceCount == 1) return m_source[0]->ReadFrame(ullFrame, pbFrame, cbFrame, pcbActual, plTempOffset, bReverse, nSkip, bDirectRead); CMType mt; HRESULT hr = FillMT(mt); if (hr != S_OK) return hr; ATLASSERT(mt.IsAudio()); const WAVEFORMATEX* pwf = mt; DWORD cbBuf = cbFrame / dwSourceCount; CMAlloc mem; if (!mem.Alloc(cbBuf)) return hr; BYTE* pbBuf = mem.Memory(); ATLASSERT(pbBuf); DWORD nBlockAlign = pwf->nBlockAlign / dwSourceCount; *pcbActual = 0; // ATLTRACE2(atlTraceGeneral, 2, _T("%s::ReadFrame(): ") // _T("MuxedReadStart: ullFrame = %I64u(0x%I64x), cbFrame = %d(0x%x)\n"), GetClassName(), ullFrame, ullFrame, // cbFrame, cbFrame); memset(pbFrame, 0, cbFrame); for(DWORD n = 0; n < dwSourceCount; n++) { DWORD cbActual = 0; hr = m_source[n]->ReadFrame(ullFrame, pbBuf, cbBuf, &cbActual, NULL, bReverse, nSkip, bDirectRead); if (hr != S_OK) return hr; if (cbActual > *pcbActual) *pcbActual = cbActual; BYTE* pbIn = pbBuf; BYTE* pbOut = pbFrame + nBlockAlign * n; BYTE* pbEnd = pbBuf + cbActual; for(; pbIn < pbEnd; pbIn += nBlockAlign, pbOut += pwf->nBlockAlign) { //DWORD cbLen = (pbIn + nBlockAlign >= pbEnd)? pbEnd - pbIn : nBlockAlign; memcpy(pbOut, pbIn, nBlockAlign); } } *pcbActual *= dwSourceCount; // ATLTRACE2(atlTraceGeneral, 2, _T("%s::ReadFrame(): ") // _T("MuxedReadAStop Actual: %d(0x%x)\n"), GetClassName(), *pcbActual, *pcbActual); // Debug_Dump(atlTraceGeneral, 2, *pcbActual, pbFrame); return S_OK; };
