vopsedec.h

au1200 linux2.6.11 硬件解码mae驱动和maiplayer播放器源码

/*************************************************************************

This software module was originally developed by 

	Ming-Chieh Lee ([e-mail]), Microsoft Corporation
	Wei-ge Chen ([e-mail]), Microsoft Corporation
	Bruce Lin ([e-mail]), Microsoft Corporation
	Chuang Gu ([e-mail]), Microsoft Corporation
	(date: March, 1996)

and edited by
	Yoshihiro Kikuchi (TOSHIBA CORPORATION)
	Takeshi Nagai (TOSHIBA CORPORATION)
	Toshiaki Watanabe (TOSHIBA CORPORATION)
	Noboru Yamaguchi (TOSHIBA CORPORATION)

and also edited by
	Dick van Smirren ([e-mail]), KPN Research
	Cor Quist ([e-mail]), KPN Research
	(date: July, 1998)

and also edited by
    Fujitsu Laboratories Ltd. (contact: Eishi Morimatsu)

and also edited by 
	Takefumi Nagumo ([e-mail]), Sony Corporation
    Sehoon Son ([e-mail]) Samsung AIT

in the course of development of the MPEG-4 Video (ISO/IEC 14496-2). 
This software module is an implementation of a part of one or more MPEG-4 Video tools 
as specified by the MPEG-4 Video. 
ISO/IEC gives users of the MPEG-4 Video free license to this software module or modifications 
thereof for use in hardware or software products claiming conformance to the MPEG-4 Video. 
Those intending to use this software module in hardware or software products are advised that its use may infringe existing patents. 
The original developer of this software module and his/her company, 
the subsequent editors and their companies, 
and ISO/IEC have no liability for use of this software module or modifications thereof in an implementation. 
Copyright is not released for non MPEG-4 Video conforming products. 
Microsoft retains full right to use the code for his/her own purpose, 
assign or donate the code to a third party and to inhibit third parties from using the code for non <MPEG standard> conforming products. 
This copyright notice must be included in all copies or derivative works. 

Copyright (c) 1996, 1997.

Module Name:

	vopsedec.h

Abstract:

	Decoder for one Video Object.

Revision History:

	09-30-97: merge error resilient changes from Toshiba by [e-mail]
	11-30-97: added Spatial tools by Takefumi Nagumo([e-mail]) SONY corporation
	12-20-97: Interlaced tools added by NextLevel Systems
        X. Chen ([e-mail]), B. Eifrig ([e-mail])
	Sep.06	1999 : RRV added by Eishi Morimatsu (Fujitsu Laboratories Ltd.) 
	Feb.01	2000 : Bug fixed OBSS by Takefumi Nagumo (Sony)
	May.25  2000 : MB stuffing decoding on the last MB by Hideaki Kimata (NTT)

*************************************************************************/

#ifndef __VOPSEDEC_HPP_ 
#define __VOPSEDEC_HPP_

#define MP4V_UNSUPPORTED_CODING_TYPE    0x80000000

// decoder.c related
extern Bool main_short_video_header;

// bitstrm.c related
#ifdef MP4_STANDALONE
#define MAX_BUFFER_SIZE            (128*1024)
#else
#define MAX_BUFFER_SIZE            (128*1024)
#endif

extern Int m_lCounter;
extern int nBytesAvailable;
extern unsigned int g_bEOFReached;
extern UInt m_uNumOfBitsInBuffer;
extern int m_chDecBuffer;
extern int nTotalBytes;
extern unsigned char MyBuffer[MAX_BUFFER_SIZE];
extern int g_nMP4VPTS;
extern int nFrames, g_iTNum;


extern INLINE Void ReadFileMP4();
extern INLINE UInt getBits (UInt numBits);//return bits from the stream
extern INLINE Int peekBits (UInt numBits); 			//peek bits from the stream
extern INLINE Int peekBitsTillByteAlign (Int *nBitsToPeek) ; //peek 1-8 bits until the next byte alignment
extern INLINE Int peekBitsFromByteAlign (Int numBits) ;		//peek from the stream at byte boundary

#ifdef ENABLE_INTERLACING
extern INLINE UInt getSingleBit ();//return 1 bit from the stream
#endif

#define MP4V_EOF()  ((nBytesAvailable <= 0) ? (g_bEOFReached) : (0))

#ifdef FAST_LUT_DECODE
// fetches 32 bits from buffer when empty
#define MP4V_RETSINGLEBIT(nBitRet)\
{\
	if (m_uNumOfBitsInBuffer == 0)\
	{\
		if(nBytesAvailable < 4)\
			ReadFileMP4();\
		{\
			unsigned char *pBuf = (unsigned char *)&(MyBuffer[nTotalBytes-nBytesAvailable]);\
			m_chDecBuffer  = pBuf[0] << 24;\
			m_chDecBuffer |= pBuf[1] << 16;\
			m_chDecBuffer |= pBuf[2] << 8;\
			m_chDecBuffer |= pBuf[3];\
            nBytesAvailable-=4;\
		}\
		m_uNumOfBitsInBuffer = 32;\
	}\
    *nBitRet = (m_chDecBuffer < 0);\
    m_chDecBuffer <<= 1;\
    m_uNumOfBitsInBuffer--;\
}

#define MP4V_FLUSH(nExtraBits)\
{\
	int nBits;\
\
	if(m_uNumOfBitsInBuffer%8 == 0)\
        getBits (nExtraBits);\
\
	else\
	{\
	    nBits = m_uNumOfBitsInBuffer;\
        m_uNumOfBitsInBuffer = ((m_uNumOfBitsInBuffer / 8) * 8);\
        /*m_uNumOfBitsInBuffer = ((m_uNumOfBitsInBuffer >> 3) << 3);*/\
\
		nBits = nBits - m_uNumOfBitsInBuffer;\
		m_chDecBuffer <<= nBits;\
	}\
}
#else // !FAST_LUT_DECODE
#define MP4V_RETSINGLEBIT(nBitRet) \
{\
if (m_uNumOfBitsInBuffer) \
{ \
    *nBitRet =(m_chDecBuffer < 0);\
    m_chDecBuffer = m_chDecBuffer << 1;\
    m_uNumOfBitsInBuffer --;\
}\
else\
{\
	if(!nBytesAvailable)\
		ReadFileMP4();\
\
    m_chDecBuffer = MyBuffer[nTotalBytes-nBytesAvailable] << 24;\
    if (nBytesAvailable) nBytesAvailable--;\

\
    *nBitRet = (m_chDecBuffer < 0);\
    m_chDecBuffer = m_chDecBuffer << 1;\
    m_uNumOfBitsInBuffer = 7;\
}\
}

#define MP4V_FLUSH(nExtraBits)\
{\
	if(m_uNumOfBitsInBuffer==0)\
        getBits (nExtraBits);\
\
	assert (m_uNumOfBitsInBuffer != 8);\
	m_uNumOfBitsInBuffer = 0;\
}
#endif

// huffman.c related
extern PPHUFFMAN_DEC_STRUCT m_pentrdecDCT;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecDCTIntra;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecMV;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecMCBPCintra;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecMCBPCinter;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecCBPY;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecIntraDCy;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecIntraDCc;
extern PPHUFFMAN_DEC_STRUCT m_pentrdecMbTypeBVOP;

// gmc_motion.c related
extern Void globalmv(Int *, Int *, Int *, Int *, CoordI, CoordI, Int, Bool);

// blkdec.c related
#define GETCODEDBLOCKPATTERN2(pMBMode, blkn) (pMBMode->m_rgbCodedBlockPattern[(UInt) blkn])
#define GETCODEDBLOCKPATTERN(pMBMode, blkn) (pMBMode->m_rgbCodedBlockPattern[(UInt) blkn-1])
#define SETCODEDBLOCKPATTERN(pMBMode, blkn, bisCoded) (GETCODEDBLOCKPATTERN(pMBMode, blkn) = bisCoded)

extern CVideoObject *g_pVO;
extern CVideoObjectDecoder *g_pDecoder;
extern VOLMode *g_pVOL; // vol mode
extern VOPMode *g_pVOP; // vop mode

// Block decoding functions
extern INLINE Void decideIntraPred (CMBMode*, Int *, Int, MacroBlockMemory* , MacroBlockMemory*, MacroBlockMemory*, MacroBlockMemory*, CMBMode*, CMBMode*, CMBMode*, BlockMemory*);

extern INLINE Void decodeTextureIntraBlock (Int, Int, Int, MacroBlockMemory*, CMBMode*, BlockMemory, Int);
extern INLINE Void decodeTextureInterBlock ();

// mbdec.c related
#define SETCBPYANDC(pmbmd, iCBPC, iCBPY)\
{\
  Int iBitPos = 3;\
\
	SETCODEDBLOCKPATTERN (pmbmd, U_BLOCK, (iCBPC >> 1) & 1);\
	SETCODEDBLOCKPATTERN (pmbmd, V_BLOCK, iCBPC & 1);\
\
	for (iBlk = Y_BLOCK1; iBlk <= Y_BLOCK4; iBlk++)\
   	{\
        SETCODEDBLOCKPATTERN (pmbmd, iBlk, (iCBPY >> iBitPos) & 1);\
        iBitPos--;\
	}\
}

#define DECODETEXTUREINTRAMB(pmbmd, iMBX, iMBY)\
{\
  iMBTop = iMBY - 1;\
  pmbmLeft = pmbmTop = pmbmLeftTop = NULL;\
  pmbmdLeft = pmbmdTop = pmbmdLeftTop = NULL;\
  iQP = pmbmd->m_stepSize;\
\
	assert (pmbmd != NULL);\
	assert (pmbmd->m_dctMd == INTRA || pmbmd->m_dctMd == INTRAQ);\
\
	if (iQP <= 4)\
  {\
		iDcScalerY = 8;\
		iDcScalerC = 8;\
	}\
\
	else if (iQP >= 5 && iQP <= 8)\
  {\
		iDcScalerY = 2 * iQP;\
		iDcScalerC = (iQP + 13) / 2;\
	}\
\
	else if (iQP >= 9 && iQP <= 24)\
  {\
		iDcScalerY = iQP + 8;\
		iDcScalerC = (iQP + 13) / 2;\
	}\
\
	else\
  {\
		iDcScalerY = 2 * iQP - 16;\
		iDcScalerC = iQP - 6;\
	}\
\
  g_pHeader3->xpos = iMBX * 2;\
  g_pHeader3->ypos = iMBY * 2;\
\
	assert (iQP > 0);\
\
	if (iMBTop >= 0)\
  {\
		if (pmbmd->m_iVideoPacketNumber == (pmbmd - g_pVO->m_iNumMBX)->m_iVideoPacketNumber)\
    {\
			pmbmTop  = g_pVO->m_rgpmbmAbove [iMBX];\
			pmbmdTop = pmbmd - g_pVO->m_iNumMBX;\
		}\
	}\
\
	if (iMBX > 0)\
  {\
		if (pmbmd->m_iVideoPacketNumber == (pmbmd - 1)->m_iVideoPacketNumber)\
    {\
			pmbmLeft  = g_pVO->m_rgpmbmCurr [iMBX - 1];\
			pmbmdLeft = pmbmd -  1;\
		}\
	}\
\
	if (iMBTop >= 0 && iMBX > 0)\
  {\
		if (pmbmd->m_iVideoPacketNumber == (pmbmd - g_pVO->m_iNumMBX - 1)->m_iVideoPacketNumber)\
    {\
			pmbmLeftTop  = g_pVO->m_rgpmbmAbove [iMBX - 1];\