60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/*++
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Copyright (c) 1995-1996 Microsoft Corporation
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Module Name:
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rvstream.h
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Abstract:
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The RVStream class maintains a circular list of MediaPackets. RTP packets received
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from the network are put into the ring (PutNextNetIn), then decoded and removed from the
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ring when the time comes to play them (GetNextPlay). After playback, the packets are
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returned to the ring (Release).
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The ring is implemented as an array and under normal operation the index of the next
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MediaPacket to play (m_PlayPos) advances by one when GetNextPlay is called.
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RVstream is intended for video packets. Each entry in the ring corresponds to a
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RTP packet as opposed to a time slot.
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--*/
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#ifndef _RVSTREAM_H_
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#define _RVSTREAM_H_
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#include <pshpack8.h> /* Assume 8 byte packing throughout */
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void FreeNetBufList(NETBUF *pNB);
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void AppendNetBufList(NETBUF *pFirstNB, NETBUF *pNB);
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class RVStream : public RxStream {
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public:
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RVStream(UINT size): RxStream(size){ m_NetBufList = NULL; m_LastGoodSeq=0xFFFF; m_pVideoFilter=NULL; m_NetBufPool.Initialize(40, sizeof(NETBUF)+sizeof(WSABUF **)); };
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virtual MediaPacket *GetNextPlay();
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virtual HRESULT PutNextNetIn(WSABUF *pNetBuf, DWORD timestamp, UINT seq, UINT fMark, BOOL *pfSkippedData, BOOL *pfSyncPoint);
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virtual BOOL ReleaseNetBuffers() ;
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virtual HRESULT FastForward( BOOL fSilenceOnly);
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HRESULT Reset(UINT seq,DWORD timestamp);
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virtual HRESULT SetLastGoodSeq(UINT seq);
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virtual Destroy();
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virtual Initialize(UINT flags, UINT size, IRTPRecv *, MEDIAPACKETINIT *papi, ULONG ulSamplesPerPacket, ULONG ulSamplesPerSec, VcmFilter *pVideoFilter);
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HRESULT RestorePacket(NETBUF *pNetBuf, MediaPacket *pVP, DWORD timestamp, UINT seq, UINT fMark, BOOL *pfReceivedKeyframe);
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private:
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HRESULT ReassembleFrame(NETBUF *pNetBuf, UINT seq, UINT fMark);
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BufferPool m_NetBufPool;
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NETBUF *m_NetBufList;
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WORD m_LastGoodSeq;
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VcmFilter *m_pVideoFilter;
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virtual void StartDecode();
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};
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#include <poppack.h> /* End byte packing */
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#endif // _RVSTREAM_H_
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