h263dec.cpp
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上传日期:2007-06-06
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文件大小:10k
- /* ***** 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 "hxtypes.h"
- #include "hxresult.h"
- #include "hxassert.h"
- #include "hxwintyp.h"
- #include "hxcom.h"
- #include "hxcomm.h"
- #include "ihxpckts.h"
- #include "hxplugn.h"
- #include "hxengin.h"
- #include "hxerror.h"
- #include "hxformt.h"
- #include "hxslist.h"
- #include "dllaccesbridge.h"
- #include "dllpath.h"
- #include "hxvh263.h"
- #include "h263vdec.h"
- #include "h263dec.h"
- #include "h263vidfmt.h"
- #include "hxstrutl.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- /****************************************************************************
- * Method:
- * CH263Decoder::CH263Decoder
- *
- */
- CH263Decoder::CH263Decoder(IUnknown* pContext)
- : m_pCodecAccess(NULL)
- , m_fpH263Init(0)
- , m_fpH263Free(0)
- , m_fpH263Transform(0)
- , m_pContext(pContext)
- , m_pDecoderState(NULL)
- , m_ulPreviousFrameType(0)
- , m_bMoreFrames(FALSE)
- {
- HX_ADDREF(m_pContext);
- }
- /****************************************************************************
- * Method:
- * CH263Decoder::~CH263Decoder
- *
- */
- CH263Decoder::~CH263Decoder()
- {
- CloseDecoder();
- HX_RELEASE(m_pContext);
- }
- HX_RESULT
- CH263Decoder::CloseDecoder()
- {
- if (m_pDecoderState)
- {
- m_fpH263Free(m_pDecoderState);
- m_pDecoderState = NULL;
- }
- m_fpH263Init = NULL;
- m_fpH263Free = NULL;
- m_fpH263Transform = NULL;
- HX_DELETE(m_pCodecAccess);
- return HXR_OK;
- }
- /****************************************************************************
- * Method:
- * CH263Decoder::CH263Decoder
- *
- */
- HX_RESULT
- CH263Decoder::InitDecoder(HXxSize* pSize)
- {
- // Build the module name if none is supplied
- char pLibName[16]; /* Flawfinder: ignore */
- // Try to load a codec until OS_BuildLibName does not find one
- for (INT32 i=0;; i++)
- {
- if (!m_pCodecAccess)
- {
- if (OS_BuildLibName(pLibName, 16, i) == FALSE)
- {
- return HXR_FAIL;
- }
- // DLLAccess should be used to provide cross-platform support
- m_pCodecAccess = new DLLAccessBridge(pLibName, DLLTYPE_CODEC, m_pContext);
- }
- if (LoadCodecFunctions())
- {
- // We found a codec and could get its symbols
- break;
- }
-
- // We could not get the codec's symbols so look for another one
- HX_DELETE(m_pCodecAccess);
- }
- if (m_pDecoderState)
- {
- m_fpH263Free(m_pDecoderState);
- }
- m_InitParams.outtype = T_YUV420_NOCOPY;
- m_InitParams.pels = (UINT16)pSize->cx;
- m_InitParams.lines = (UINT16)pSize->cy;
- m_InitParams.nPadWidth = 0; /* number of columns of padding on right to get 16 x 16 block*/
- m_InitParams.nPadHeight = 0;/* number of rows of padding on bottom to get 16 x 16 block*/
- m_InitParams.ulInvariants = 0;
- // ulInvariants specifies the invariant picture header bits
- m_InitParams.packetization = TRUE;
- m_InitParams.ulStreamVersion = HX_ENCODE_PROD_VERSION(4,4,0,0);
- return m_fpH263Init(&m_InitParams, &m_pDecoderState);
- }
- /****************************************************************************
- * Method:
- * CH263Decoder::DecodeFrame()
- */
- HX_RESULT
- CH263Decoder::DecodeFrame(CMediaPacket* pFrameToDecode,
- UINT8* pDecodedBuf,
- HXxSize* pFrameDims)
- {
- HX_RESULT ret = HXR_OK;
- if (m_fpH263Transform != NULL)
- {
- H263DecoderOutParams OutputParams;
- H263DecoderInParams InputParams;
-
- InputParams.dataLength = pFrameToDecode->m_ulDataSize;
- InputParams.bInterpolateImage = FALSE;
- InputParams.numDataSegments = 0;
- InputParams.pDataSegments = 0;
- InputParams.timestamp = pFrameToDecode->m_ulTime;
- InputParams.flags = 0;
- if (m_bMoreFrames)
- {
- m_bMoreFrames = FALSE;
- InputParams.flags |= RV_DECODE_MORE_FRAMES;
- }
-
- if (pDecodedBuf != NULL)
- {
- ret = VerifyInput(pFrameToDecode, &InputParams);
-
- if (FAILED(ret))
- {
- return ret;
- }
- ret = m_fpH263Transform(pFrameToDecode->m_pData,
- pDecodedBuf, &InputParams,
- &OutputParams, m_pDecoderState);
- #ifdef XXX_JHUG_DEBUG
- FILE* f = fopen("C:\TEMP\decodeLog.txt", "a+");
- fprintf(f, "Transform pBuffer, length=%i %sn", pBuffer->GetSize(), SUCCEEDED(ret) ? "SUCCEEDED":"FAILED");
- fclose(f);
- #endif // XXX_JHUG_DEBUG
-
- if (OutputParams.notes & RV_DECODE_KEY_FRAME)
- {
- m_ulPreviousFrameType = FRAME_TYPE_I;
- }
- else
- {
- if (OutputParams.notes & RV_DECODE_B_FRAME)
- {
- m_ulPreviousFrameType = FRAME_TYPE_B;
- }
- else
- {
- m_ulPreviousFrameType = FRAME_TYPE_P;
- }
- }
- if (pFrameDims)
- {
- pFrameDims->cx = OutputParams.width;
- pFrameDims->cy = OutputParams.height;
- }
- }
- else
- {
- m_ulPreviousFrameType = FRAME_TYPE_I;
- }
- if (OutputParams.notes & RV_DECODE_MORE_FRAMES)
- {
- m_bMoreFrames = TRUE;
- }
- else
- {
- m_bMoreFrames = FALSE;
- }
- }
- else
- {
- ret = HXR_FAIL;
- }
-
- return ret;
- }
- /****************************************************************************
- * Method:
- * CH263Decoder::OS_BuildLibName
- */
- BOOL CH263Decoder::OS_BuildLibName(char *pLibName,
- UINT32 ulLibNameBufLen,
- INT32 nIndex)
- {
- BOOL rtn = TRUE;
- if (pLibName == NULL)
- return FALSE;
- // Priority scheme for loading h263 backend
- switch (nIndex)
- {
- // mpeg4/h263/rv7 combo decoder
- case 0:
- SafeStrCpy(pLibName, "dmp4", ulLibNameBufLen);
- break;
-
- // g2 decoder
- case 1:
- case 2:
- SafeStrCpy(pLibName, "drv2", ulLibNameBufLen);
- break;
-
- // h263 backend
- case 3:
- SafeStrCpy(pLibName, "d263", ulLibNameBufLen);
- break;
- default:
- return FALSE;
- }
- #if defined(WIN32) || defined(_WIN32)
- if (2 == nIndex)
- {
- SafeStrCat(pLibName, "3260", ulLibNameBufLen);
- }
- SafeStrCat(pLibName, ".DLL", ulLibNameBufLen);
- #elif defined (_MAC_UNIX)
- SafeStrCpy(pLibName, ".bundle", ulLibNameBufLen);
- #elif _MACINTOSH
- #if defined(_CARBON)
- #ifdef _MAC_MACHO
- SafeStrCpy(pLibName, ".bundle", ulLibNameBufLen);
- #else // _MAC_MACHO
- SafeStrCat(pLibName, ".shlb", ulLibNameBufLen);
- #endif // _MAC_MACHO
- #else // _CARBON
- SafeStrCat(pLibName, ".DLL", ulLibNameBufLen);
- #endif // _CARBON
- #elif defined (_UNIX)
- //
- // codecs are named like this :XXXX.so" where XXXX is the
- // codec id string
- //
- SafeStrCat(pLibName, ".so", ulLibNameBufLen);
- #endif
- return rtn;
- }
- BOOL CH263Decoder::LoadCodecFunctions()
- {
- BOOL bReturn = m_pCodecAccess->isOpen();
- if (bReturn)
- {
- // we got a module so get the symbols we need
- if (!m_fpH263Init)
- {
- m_fpH263Init = (FPTRANSFORMINIT) m_pCodecAccess->getSymbol("RV20toYUV420Init");
- }
- if (!m_fpH263Init)
- {
- m_fpH263Init = (FPTRANSFORMINIT) m_pCodecAccess->getSymbol("HXVtoYUV420Init");
- }
- if (!m_fpH263Free)
- {
- m_fpH263Free = (FPTRANSFORMFREE) m_pCodecAccess->getSymbol("RV20toYUV420Free");
- }
- if (!m_fpH263Free)
- {
- m_fpH263Free = (FPTRANSFORMFREE) m_pCodecAccess->getSymbol("HXVtoYUV420Free");
- }
- if (!m_fpH263Transform)
- {
- m_fpH263Transform = (FPTRANSFORMHXV10TOYUV) m_pCodecAccess->getSymbol("RV20toYUV420Transform");
- }
- if (!m_fpH263Transform)
- {
- m_fpH263Transform = (FPTRANSFORMHXV10TOYUV) m_pCodecAccess->getSymbol("HXVtoYUV420Transform");
- }
-
- if (m_fpH263Init == NULL ||
- m_fpH263Free == NULL ||
- m_fpH263Transform == NULL)
- {
- bReturn = FALSE;
- }
- }
- return bReturn;
- }