qt_parse.c

dm270 source code

/*-----------------------------------------------------------------------------\
@ModuleName  :: qt.c

@Description :: Quick Time Wrapper for MJPEG , H263, MPEG-4 bitstream

                For info about Quick Time File Format see QTFF reference at
                http://developer.apple.com/techpubs/quicktime/qtdevdocs/QTFF/qtff.html

@Copyright   :: Copyright 2001- Texas Instruments, Inc.

@History     ::
-------------------------------------------------------------------------------

    Dec.  26, 2001  Kedar C ([e-mail]) Start


\-----------------------------------------------------------------------------*/


/* include files    */

#include <string.h>
#include <qtff/qt.h>
#include <qtff/qt_parse.h>


/* Module Routines  */

/*-----------------------------------------------------------------------------\
@RoutineName :: QTShowParams

@Description ::
    Display the MOOV_Info struct on stdout


@Parameters  ::
    MOOV_Info *moov     ::  QT Configuration structure to be displayed

@Return      ::
    E_PASS,     success
    E_DEVICE,  failure
\-----------------------------------------------------------------------------*/
STATUS  QTShowParams(QTParams *prmQT) {
    printf("\n");
    printf("\n  QuickTime File Format Parameters :");
    printf("\n  ==================================");
    printf("\n");
	#if QT_DEBUG
    printf("\n  Videosize           : %ld", prmQT->Videosize        );
	#endif
    printf("\n  DataFormat          : %c%c%c%c",
                (char)( prmQT->DataFormat >> 24) , (char)( prmQT->DataFormat >> 16 ) & 0xFF ,
                (char)( prmQT->DataFormat >> 8 ) & 0xFF, (char)prmQT->DataFormat  & 0xFF  );

    printf("\n  Duration            : %ld.%ld secs", prmQT->Scount / prmQT->FrameRate,
                                    (prmQT->Scount % prmQT->FrameRate)*( 60 / prmQT->FrameRate )         );
    printf("\n  Sample Count        : %ld", prmQT->Scount           );
    printf("\n  SampleDuration      : %ld", prmQT->SampleDuration   );
    printf("\n  Timescale           : %ld", prmQT->Timescale        );
    printf("\n  FrameRate           : %ld", prmQT->FrameRate        );
    printf("\n  Width               : %d", prmQT->Width            );
    printf("\n  Height              : %d", prmQT->Height           );
	#if QT_DEBUG
    printf("\n  MediaTime           : %ld", prmQT->MediaTime        );
    printf("\n  MediaRate           : %d.%d", (Uint16)(prmQT->MediaRate >> 16), (Uint16)(prmQT->MediaRate & 0xFFFF ));
    printf("\n  GraphicsMode        : 0x%x", prmQT->GraphicsMode     );

    printf("\n  TemporalQuality     : %ld", prmQT->TemporalQuality  );
    printf("\n  SpatialQuality      : %ld", prmQT->SpatialQuality   );
    printf("\n  Hres (pixels/inch)  : %d.0", prmQT->Hres );
    printf("\n  Vres (pixels/inch)  : %d.0", prmQT->Vres );
    printf("\n  FramePerSample      : %d", prmQT->FramePerSample   );
    printf("\n  ColorDepth          : %d-bit", prmQT->ColorDepth       );
    printf("\n  FieldCount          : %d", prmQT->FieldCount       );
    printf("\n  FieldOrdering       : %d", prmQT->FieldOrdering    );
    printf("\n  KeyFrameInterval    : %d", prmQT->KeyFrameInterval );
	#endif
	printf("\n  Video Chunk Offset  : %ld", prmQT->ChunkOffset);
    if( prmQT->SsizeConst == FALSE ) {
        #if QT_DEBUG
        Uint32 i;

        printf("\n  Sample size Array ( hex ):");

        for( i=0; i<prmQT->Scount; i++) {
            if( i%10 == 0 )
                printf("\n    ");
            printf("%6lx ", prmQT->Ssize[i]);

        } 
        #endif
    } else {
        printf("\n  Const SampleSize     : 0x%lx", prmQT->Ssize[0]    );
    }
    if( prmQT->audioPrmQT.IncludeAudio) {
		#if QT_DEBUG
        printf("\n  Audio data size     : %d", prmQT->audioPrmQT.AudioDataSize);
        printf("\n  Audio Sampling Rate : %d", prmQT->audioPrmQT.SamplingRate);
        printf("\n  Audio Channels      : %d", prmQT->audioPrmQT.AudioChannels);
		#endif
		printf("\n  Audio Chunk Offset  : %ld", prmQT->audioPrmQT.ChunkOffset);
    }
    printf("\n");
    printf("\n");

    return E_PASS;
}

/*-----------------------------------------------------------------------------\

    QT Parser Routines

\-----------------------------------------------------------------------------*/

static MOOV_Info moov;	

/*-----------------------------------------------------------------------------\
@RoutineName :: QTParseMOOVAtom

@Description ::
    Parse the Movie Atom

@Parameters  ::
    Uint8 *start        ::  Pointer to start of MOOV Atom
    Uint32 size          ::  Size of MOOV Atom
    MOOV_Info *moov     ::  QT Configuration structure


@Return      ::
    E_PASS,     success
    E_DEVICE,  failure
\-----------------------------------------------------------------------------*/
STATUS QTParseMOOVAtom(Uint8 *start, Uint32 size, QTParams *prmQT) {
    Uint32 tag;
    Uint8 *cur;
    Uint8 *end;
	Uint8 i;

    size = get_word32( start );
    tag  = get_word32( start + 4 );

    if( tag != QT_MOOV_TAG )
        return E_DEVICE;

    end = start + size;
    cur = start + 8;
	i   = 0;

	moov.trak[0].mdia.minf.stbl.stsz.sampleSizeTable = prmQT->Ssize;
	moov.trak[1].mdia.minf.stbl.stsz.sampleSizeTable = prmQT->Ssize;

    while(cur < end) {
        size = get_word32( cur );
        tag  = get_word32( cur + 4 );

        switch( tag ) {
            case QT_MVHD_TAG :
                QTParseMVHDAtom( cur , size, &moov.mvhd );
                break;
            case QT_TRAK_TAG :
				if(i<MAX_TRAK_ATOMS) {
					QTParseTRAKAtom( cur , size, &moov.trak[i]);
					i++;
				}	
                break;
            default :
                /* tag not supported or no useful info in tag   */
                break;
        }
        cur += size;
    }

    // fill prmQT based on MOOV_Info data
	prmQT->audioPrmQT.IncludeAudio = FALSE;
	{
		Uint8 j;

		prmQT->Timescale = moov.mvhd.timescale;
		prmQT->Duration  = moov.mvhd.duration;

		for(j=0; j<i; j++) {
			TRAK_Info *trak;
			STBL_Info *stbl;

			trak = &moov.trak[j];
			stbl = &trak->mdia.minf.stbl;
			
			if(trak->mdia.hdlr.compSubType==COMP_SUB_TYPE_VIDE)	{
				prmQT->Width = trak->tkhd.width;
				prmQT->Height= trak->tkhd.height;
				prmQT->DataFormat = stbl->stsd.dataformat;
				prmQT->Scount = stbl->stsz.sampleCount;
				prmQT->SsizeConst = (BOOL)stbl->stsz.sampleSizeConst;
				prmQT->ChunkOffset = stbl->stco.chunkOffset;
			}
			if(trak->mdia.hdlr.compSubType==COMP_SUB_TYPE_SOUN)	{
				prmQT->audioPrmQT.IncludeAudio = TRUE;
				prmQT->audioPrmQT.ChunkOffset  = stbl->stco.chunkOffset;
			}	
		}
	}
	if(prmQT->Scount==0)
		prmQT->Scount=1;
	
	prmQT->SampleDuration = prmQT->Duration/prmQT->Scount;
	
	if(prmQT->SampleDuration==0)
		prmQT->SampleDuration=1;

	prmQT->FrameRate      = prmQT->Timescale/prmQT->SampleDuration;

	if(prmQT->FrameRate==0)  
		prmQT->FrameRate=1;
	
    return E_PASS;
}


/*-----------------------------------------------------------------------------\
@RoutineName :: QTParseMVHDAtom

@Description ::
    Parse the Movie Header Atom

@Parameters  ::
    Uint8     *start        ::  Pointer to start of Atom
    Uint32    size          ::  Size of Atom
    MVHD_Info *mvhd         ::  MVHD Info


@Return      ::
    E_PASS,     success
    E_DEVICE,  failure
\-----------------------------------------------------------------------------*/
STATUS QTParseMVHDAtom( Uint8 *start , Uint32 size, MVHD_Info *mvhd) {
    mvhd->timescale = get_word32( start + QT_TIMESCALE_OFFSET );
    mvhd->duration  = get_word32( start + QT_DURATION_OFFSET  );
    return E_PASS;
}

/*-----------------------------------------------------------------------------\
@RoutineName :: QTParseTRAKAtom

@Description ::
    Parse the Track Atom

@Parameters  ::
    Uint8 *start        ::  Pointer to start of Atom
    Uint32 size         ::  Size of Atom
    TRAK_Info *trak     ::  TRAK Info


@Return      ::
    E_PASS,     success
    E_DEVICE,  failure
\-----------------------------------------------------------------------------*/
STATUS QTParseTRAKAtom( Uint8 *start , Uint32 size, TRAK_Info *trak) {
    Uint32 tag;
    Uint8 *cur;
    Uint8 *end;

    end = start + size;
    cur = start + 8;

    while(cur < end) {
        size = get_word32( cur );
        tag  = get_word32( cur + 4 );

        switch( tag ) {
            case QT_TKHD_TAG :
                QTParseTKHDAtom( cur , size, &trak->tkhd);
                break;
            case QT_MDIA_TAG :
                QTParseMDIAAtom( cur , size, &trak->mdia);
                break;
            default :
                /* tag not supported or no useful info in tag   */
                break;
        }
        cur += size;
    }

    return E_PASS;
}

/*-----------------------------------------------------------------------------\
@RoutineName :: QTParseTKHDAtom

@Description ::
    Parse the Track Header Atom

@Parameters  ::
    Uint8 *start        ::  Pointer to start of Atom