h263pyld.cpp
上传用户:zhongxx05
上传日期:2007-06-06
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文件大小:13k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "h263pyld.h"
- #include "debug.h"
- #include "ihxpckts.h"
- #include <string.h>
- #include "rfc2190hlpr.h"
- #include "rfc2429hlpr.h"
- #include "bitstream.h"
- #include "bitpack.h"
- #define D_H263 0 // D_INFO
- CH263PayloadFormat::CH263PayloadFormat() :
- m_lRefCount(0),
- m_pCCF(0),
- m_state(NeedPSC),
- m_ulFrameSize(0),
- m_ulTimestamp(0),
- m_pDepackHlpr(0)
- {
- #ifdef DEBUG
- debug_level() |= D_H263;
- #endif /* DEBUG */
- }
- CH263PayloadFormat::~CH263PayloadFormat()
- {
- HX_RELEASE(m_pCCF);
- FlushInput();
- FlushOutput();
- delete m_pDepackHlpr;
- m_pDepackHlpr = 0;
- }
- /*
- * IUnknown methods
- */
- STDMETHODIMP CH263PayloadFormat::QueryInterface(REFIID riid,
- void** ppvObj)
- {
- HX_RESULT res = HXR_NOINTERFACE;
- *ppvObj = NULL;
- if (IsEqualIID(riid, IID_IUnknown))
- {
- AddRef();
- *ppvObj = this;
- res = HXR_OK;
- }
- else if (IsEqualIID(riid, IID_IHXPayloadFormatObject))
- {
- AddRef();
- *ppvObj = (IHXPayloadFormatObject*)this;
- res = HXR_OK;
- }
- return res;
- }
- STDMETHODIMP_(ULONG32) CH263PayloadFormat::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- STDMETHODIMP_(ULONG32) CH263PayloadFormat::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- /*
- * IHXPayloadFormatObject methods
- */
- STDMETHODIMP CH263PayloadFormat::Init(THIS_
- IUnknown* pContext,
- BOOL bPacketize)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::Init(%p, %d)n",
- pContext, bPacketize));
- HX_RESULT res = HXR_UNEXPECTED;
- if (!bPacketize)
- {
- // Currently we only support depacketization
- res = pContext->QueryInterface(IID_IHXCommonClassFactory,
- (void**)&m_pCCF);
- }
- return res;
- }
- STDMETHODIMP CH263PayloadFormat::Close()
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::Close()n"));
- Flush();
- return HXR_OK;
- }
- STDMETHODIMP CH263PayloadFormat::Reset()
- {
- // Called on Seeks
- DPRINTF(D_H263, ("CH263PayloadFormat::Reset()n"));
- FlushInput();
- FlushOutput();
- m_state = NeedPSC;
- return HXR_OK;
- }
- STDMETHODIMP CH263PayloadFormat::SetStreamHeader(IHXValues* pHeader)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::SetStreamHeader()n"));
- return HXR_OK;
- }
- STDMETHODIMP CH263PayloadFormat::GetStreamHeader(REF(IHXValues*) pHeader)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::GetStreamHeader()n"));
- return HXR_OK;
- }
- STDMETHODIMP CH263PayloadFormat::SetPacket(IHXPacket* pPacket)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::SetPacket()n"));
- HX_RESULT res = HXR_UNEXPECTED;
- if (!pPacket->IsLost())
- {
- IHXBuffer* pBuf = pPacket->GetBuffer();
- const UINT8* pData = 0;
- ULONG32 ulDataSize = 0;
- BOOL bP = FALSE;
- res = HXR_OK;
- if (!m_pDepackHlpr)
- res = CreateHelper(pBuf->GetBuffer(), pBuf->GetSize());
- if (SUCCEEDED(res) &&
- SUCCEEDED(res = m_pDepackHlpr->OnPacket(pBuf->GetBuffer(),
- pBuf->GetSize())))
- {
- BOOL bDone = FALSE;
- BOOL bPacketAdded = FALSE;
- /* Cache values since ProcessPacket() uses
- * m_pDepackHlpr and can change it's state.
- */
- UINT32 ulDataSize = m_pDepackHlpr->DataSize();
- BOOL bIsPictureStart = m_pDepackHlpr->IsPictureStart();
- while(!bDone && SUCCEEDED(res))
- {
- switch(m_state) {
- case NeedPSC:
- // See if this packet has a PSC
- if (bIsPictureStart)
- {
- m_ulFrameSize = 0; // Make sure the frame size is 0
- // Add the packet to the input queue
- res = AddPacket(ulDataSize, pPacket);
- // Signal that we added this packet
- bPacketAdded = TRUE;
- // Cache the timestamp for this frame
- m_ulTimestamp = pPacket->GetTime();
- // Change state
- m_state = GotPSC;
- }
- else
- {
- // Signal that we are done handling this packet
- bDone = TRUE;
- }
- break;
- case GotPSC:
- if (pPacket->GetTime() == m_ulTimestamp)
- {
- // See if the packet has been added yet
- if (!bPacketAdded)
- {
- DPRINTF (D_H263,("Multi-packetn"));
- // Add the packet to the input queue
- res = AddPacket(ulDataSize, pPacket);
- // Signal that we added this packet
- bPacketAdded = TRUE;
- }
- // Check for the marker bit. The marker bit
- // is always mapped to odd ASM rule numbers
- if ((pPacket->GetASMRuleNumber() & 0x1) == 1)
- m_state = GotFrame;
- else
- bDone = TRUE;
- }
- else
- {
- // This appears to be a different frame.
- // Goto the GotFrame state so that we
- // process the current frame
- m_state = GotFrame;
- }
- break;
- case GotFrame:
- if (!m_inputQueue.IsEmpty())
- {
- // Process the packets in the input queue
- res = ProcessPackets();
- }
- // Change to the NeedPSC state
- m_state = NeedPSC;
- if (bPacketAdded)
- bDone = TRUE;
- };
- }
- }
- if (!SUCCEEDED(res))
- {
- /* Something unexpected happened.
- * Flush everything.
- */
- FlushInput();
- }
- HX_RELEASE(pBuf);
- }
- else
- {
- FlushInput();
- res = HXR_OK;
- }
- return res;
- }
- STDMETHODIMP CH263PayloadFormat::GetPacket(REF(IHXPacket*) pPacket)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::GetPacket()n"));
- HX_RESULT res = HXR_FAILED;
- if (!m_outputQueue.IsEmpty())
- {
- pPacket = (IHXPacket*)m_outputQueue.RemoveHead();
- res = HXR_OK;
- }
- DPRINTF(D_H263, ("CH263PayloadFormat::GetPacket() : %08xn", res));
- return res;
- }
- STDMETHODIMP CH263PayloadFormat::Flush()
- {
- // Called at the end of the clip
- DPRINTF(D_H263, ("CH263PayloadFormat::Flush()n"));
- FlushInput();
- return HXR_OK;
- }
- static HX_RESULT GetH263FrameSize(int fmt, HXxSize &FrameDim)
- {
- HX_RESULT res = HXR_NO_DATA;
- if (fmt == 1)
- {
- FrameDim.cx = 128;
- FrameDim.cy = 96;
- res = HXR_OK;
- }
- else if ((fmt >= 2) && (fmt < 6))
- {
- FrameDim.cx = 176;
- FrameDim.cy = 144;
- for(;fmt > 2; fmt--)
- {
- FrameDim.cx <<= 1;
- FrameDim.cy <<= 1;
- }
- res = HXR_OK;
- }
- else
- HX_ASSERT(FALSE);
- return res;
- }
- static HX_RESULT HandleH263Plus(Bitstream& bs, HXxSize &FrameDim)
- {
- HX_RESULT res = HXR_UNEXPECTED;
- if (bs.GetBits(3) == 1) // UFEP
- {
- int fmt = bs.GetBits(3); // OPPTYPE (bits 1-3)
- if (fmt != 0x6)
- res = GetH263FrameSize(fmt, FrameDim);
- else
- {
- // This frame has custom dimensions
- bs.GetBits(11) ; // OPPTYPE (bits 4-14)
- if (bs.GetBits(4) == 0x8) // OPPTYPE (bits 15-18)
- {
- bs.GetBits(6); // MPPTYPE (bits 1-6)
- if (bs.GetBits(3) == 0x1) // MPPTYPE (bits 7-9)
- {
- if (bs.GetBits(1)) // CPM
- bs.GetBits(2); // PSBI
- bs.GetBits(4); // CPFMT (bits 1-4)
- int pwi = (bs.GetBits(9) + 1) * 4;
- if (bs.GetBits(1)) // CPFMT (bit 14)
- {
- int phi = (bs.GetBits(9)) * 4;
- if ((phi >= 1) && (phi <= 288))
- {
- FrameDim.cx = pwi;
- FrameDim.cy = phi;
- res = HXR_OK;
- }
- }
- }
- }
- }
- }
- return res;
- }
- HX_RESULT CH263PayloadFormat::GetFrameDimensions(IHXBuffer* pBuffer,
- HXxSize &FrameDim)
- {
- DPRINTF(D_H263, ("CH263PayloadFormat::GetFrameDimensions()n"));
- HX_RESULT res = HXR_UNEXPECTED;
- Bitstream bs;
- if (pBuffer->GetSize() >= 5)
- {
- bs.SetBuffer(pBuffer->GetBuffer());
- if (bs.GetBits(22) == 0x20) // Check PSC
- {
- bs.GetBits(8); // Skip TR
- if (bs.GetBits(2) == 0x02) // PTYPE(bits 1 & 2)
- {
- bs.GetBits(3); // PTYPE(bits 3-5)
- int fmt = bs.GetBits(3); // Get Format
- if (fmt != 0x7)
- {
- res = GetH263FrameSize(fmt, FrameDim);
- }
- else if (pBuffer->GetSize() >= 13)
- {
- // This has an extended PTYPE
- res = HandleH263Plus(bs, FrameDim);
- }
- }
- }
- }
- DPRINTF(D_H263, ("CH263PayloadFormat::GetFrameDimensions() : %dn", res));
- return res;
- }
- HX_RESULT CH263PayloadFormat::ProcessPackets()
- {
- HX_RESULT res = HXR_UNEXPECTED;
- if (m_pCCF)
- {
- IHXBuffer* pBuf = 0;
- IHXRTPPacket* pOutRTPPkt = 0;
- ULONG32 ulFrameBytes = (m_ulFrameSize + 7) >> 3;
- if (!m_pDepackHlpr)
- res = CreateHelper(pBuf->GetBuffer(), pBuf->GetSize());
- else
- res = HXR_OK;
- if (SUCCEEDED(res) &&
- SUCCEEDED((res = m_pCCF->CreateInstance(IID_IHXBuffer,
- (void**)(&pBuf)))) &&
- SUCCEEDED((res = pBuf->SetSize(ulFrameBytes))) &&
- SUCCEEDED((res = m_pCCF->CreateInstance(IID_IHXRTPPacket,
- (void**)(&pOutRTPPkt)))))
- {
- BitPacker bp(pBuf->GetBuffer(), pBuf->GetSize());
- LISTPOSITION pos = m_inputQueue.GetHeadPosition();
- while((pos != 0) && SUCCEEDED(res))
- {
- IHXPacket* pPacket = (IHXPacket*)m_inputQueue.GetNext(pos);
- IHXBuffer* pPktBuf = pPacket->GetBuffer();
- res = m_pDepackHlpr->OnPacket(pPktBuf->GetBuffer(),
- pPktBuf->GetSize());
- if (SUCCEEDED(res))
- res = m_pDepackHlpr->CopyPayload(bp);
- ULONG32 used = bp.BytesUsed();
- HX_ASSERT(used <= ulFrameBytes);
- // Release the packet buffer
- HX_RELEASE(pPktBuf);
- }
- if (SUCCEEDED(res))
- {
- IHXPacket* pFirstPkt = (IHXPacket*)m_inputQueue.GetHead();
- IHXRTPPacket* pRTPPkt = 0;
- if (SUCCEEDED(pFirstPkt->QueryInterface(IID_IHXRTPPacket,
- (void**)&pRTPPkt)))
- {
- res = pOutRTPPkt->SetRTP(pBuf,
- pRTPPkt->GetTime(),
- pRTPPkt->GetRTPTime(),
- pRTPPkt->GetStreamNumber(),
- pRTPPkt->GetASMFlags(),
- pRTPPkt->GetASMRuleNumber());
- }
- else
- {
- res = pOutRTPPkt->Set(pBuf,
- pFirstPkt->GetTime(),
- pFirstPkt->GetStreamNumber(),
- pFirstPkt->GetASMFlags(),
- pFirstPkt->GetASMRuleNumber());
- }
- IHXPacket* pOutPkt = 0;
- res = pOutRTPPkt->QueryInterface(IID_IHXPacket,
- (void**)&pOutPkt);
- if (SUCCEEDED(res))
- m_outputQueue.AddTail(pOutPkt);
- HX_RELEASE(pRTPPkt);
- }
- }
- HX_RELEASE(pBuf);
- HX_RELEASE(pOutRTPPkt);
- }
- FlushInput();
- return res;
- }
- HX_RESULT CH263PayloadFormat::AddPacket(ULONG32 ulDataSize, IHXPacket* pPacket)
- {
- HX_RESULT res = HXR_OUTOFMEMORY;
- if (m_inputQueue.AddTail(pPacket))
- {
- m_ulFrameSize += ulDataSize;
- pPacket->AddRef();
- res = HXR_OK;
- }
- return res;
- }
- void CH263PayloadFormat::FlushInput()
- {
- LISTPOSITION pos = m_inputQueue.GetHeadPosition();
- while(pos != 0)
- {
- IHXPacket* pPacket = (IHXPacket*)m_inputQueue.GetNext(pos);
- HX_RELEASE(pPacket);
- }
- m_inputQueue.RemoveAll();
- m_ulFrameSize = 0;
- m_state = NeedPSC;
- }
- void CH263PayloadFormat::FlushOutput()
- {
- LISTPOSITION pos = m_outputQueue.GetHeadPosition();
- while(pos != 0)
- {
- IHXPacket* pPacket = (IHXPacket*)m_outputQueue.GetNext(pos);
- HX_RELEASE(pPacket);
- }
- m_outputQueue.RemoveAll();
- }
- HX_RESULT CH263PayloadFormat::CreateHelper(const UINT8* pBuf,
- ULONG32 ulBufSize)
- {
- HX_RESULT res = HXR_UNEXPECTED;
- #if defined(HELIX_FEATURE_H263_RFC2429)
- // Try the RFC2429 helper first
- if (FAILED(res))
- {
- HX_DELETE(m_pDepackHlpr);
- m_pDepackHlpr = new CRFC2429Helper();
- if (m_pDepackHlpr)
- {
- res = m_pDepackHlpr->OnPacket(pBuf, ulBufSize);
- }
- }
- #endif
- #if defined(HELIX_FEATURE_H263_RFC2190)
- // If the RFC2429 helper didn't succeed, then
- // try the RFC2190 helper next.
- if (FAILED(res))
- {
- HX_DELETE(m_pDepackHlpr);
- m_pDepackHlpr = new CRFC2190Helper();
- if (m_pDepackHlpr)
- {
- res = m_pDepackHlpr->OnPacket(pBuf, ulBufSize);
- }
- }
- #endif
- return res;
- }