157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
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// Copyright (c) 1997 Microsoft Corporation. All Rights Reserved.
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// bytestrm.h : Declaration of the CByteStream
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#ifndef __BYTESTRM_H_
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#define __BYTESTRM_H_
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class CByteSample;
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/////////////////////////////////////////////////////////////////////////////
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// CByteStream
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class ATL_NO_VTABLE CByteStream :
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public CStream
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{
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public:
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//
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// METHODS
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//
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CByteStream();
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STDMETHODIMP SetState(
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/* [in] */ FILTER_STATE State
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);
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//
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// IPin
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//
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STDMETHODIMP BeginFlush();
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STDMETHODIMP EndOfStream(void);
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//
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// IMemInputPin
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//
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STDMETHODIMP Receive(IMediaSample *pSample);
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STDMETHODIMP GetAllocator(IMemAllocator ** ppAllocator);
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//
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// IMemAllocator
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//
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STDMETHODIMP GetBuffer(IMediaSample **ppBuffer, REFERENCE_TIME * pStartTime,
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REFERENCE_TIME * pEndTime, DWORD dwFlags);
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// Fill any samples waiting to be filled
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void FillSamples();
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// Check if it's time to do the real EndOfStream
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void CheckEndOfStream();
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protected:
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/* Queue of samples */
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CDynamicArray<IMediaSample *, CComPtr<IMediaSample> >
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m_arSamples;
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/* Current sample/buffer */
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PBYTE m_pbData;
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DWORD m_cbData;
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DWORD m_dwPosition;
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/* Track time stamps */
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CTimeStamp m_TimeStamp;
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/* Byte rate for time stamp computation */
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LONG m_lBytesPerSecond;
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/* End Of Stream pending - it will be delivered when we've
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emptied the last sample off our list
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*/
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bool m_bEOSPending;
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};
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/////////////////////////////////////////////////////////////////////////////
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// CByteStreamSample
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class ATL_NO_VTABLE CByteStreamSample :
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public CSample
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{
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friend class CByteStream;
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public:
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CByteStreamSample();
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//
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// IStreamSample
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//
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STDMETHODIMP GetMediaStream(
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/* [in] */ IMediaStream **ppMediaStream)
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{
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return CSample::GetMediaStream(ppMediaStream);
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}
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STDMETHODIMP GetSampleTimes(
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/* [optional][out] */ STREAM_TIME *pStartTime,
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/* [optional][out] */ STREAM_TIME *pEndTime,
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/* [optional][out] */ STREAM_TIME *pCurrentTime)
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{
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return CSample::GetSampleTimes(
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pStartTime,
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pEndTime,
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pCurrentTime
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);
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}
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STDMETHODIMP SetSampleTimes(
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/* [optional][in] */ const STREAM_TIME *pStartTime,
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/* [optional][in] */ const STREAM_TIME *pEndTime)
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{
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return CSample::SetSampleTimes(pStartTime, pEndTime);
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}
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STDMETHODIMP CompletionStatus(
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/* [in] */ DWORD dwFlags,
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/* [optional][in] */ DWORD dwMilliseconds)
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{
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return CSample::CompletionStatus(dwFlags, dwMilliseconds);
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}
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HRESULT Init(
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IMemoryData *pMemData
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);
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STDMETHODIMP GetInformation(
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/* [out] */ DWORD *pdwLength,
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/* [out] */ BYTE **ppbData,
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/* [out] */ DWORD *pcbActualData
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);
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// Override to make sure samples get updated
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HRESULT InternalUpdate(
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DWORD dwFlags,
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HANDLE hEvent,
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PAPCFUNC pfnAPC,
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DWORD_PTR dwAPCData
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);
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//
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// Methods forwarded from MediaSample object.
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//
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HRESULT MSCallback_GetPointer(BYTE ** ppBuffer) { *ppBuffer = m_pbData; return NOERROR; };
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LONG MSCallback_GetSize(void) { return m_cbSize; };
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LONG MSCallback_GetActualDataLength(void) { return m_cbData; };
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HRESULT MSCallback_SetActualDataLength(LONG lActual)
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{
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if ((DWORD)lActual <= m_cbSize) {
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m_cbData = lActual;
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return NOERROR;
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}
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return E_INVALIDARG;
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};
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protected:
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PBYTE m_pbData;
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DWORD m_cbSize;
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DWORD m_cbData;
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CComPtr<IMemoryData> m_pMemData;
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};
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#endif // __BYTESTRM_H_
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