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Recognize and skip ftype chunk used by some .mp4 files and

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add fallback to displaysize if imagesize is unavailable.
Also update some doc info.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5243 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmos4 2002-03-21 16:42:58 +00:00
parent 043873b937
commit 802fa9ffcc
1 changed files with 25 additions and 12 deletions
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37
libmpdemux/demux_mov.c
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@ -4,8 +4,12 @@
// compressed header support from moov.c of the openquicktime lib.
// References: http://openquicktime.sf.net/, http://www.heroinewarrior.com/
// http://www.geocities.com/SiliconValley/Lakes/2160/fformats/files/mov.pdf
// The QuickTime File Format PDF (QTFileFormat.pdf) from Apple:
// http://developer.apple.com/quicktime/
// (above url no longer works, file mirrored somewhere? ::atmos)
// The QuickTime File Format PDF from Apple:
// http://developer.apple.com/techpubs/quicktime/qtdevdocs/PDF/QTFileFormat.pdf
// (Complete list of documentation at http://developer.apple.com/quicktime/)
// MP4-Lib sources from http://mpeg4ip.sf.net/ might be usefull fot .mp4
// aswell as .mov specific stuff.
#include <stdio.h>
#include <stdlib.h>
@ -233,12 +237,21 @@ int mov_check_file(demuxer_t* demuxer){
else if (len == 0) /* deleted chunk */
{
/* XXX: CJB! is this right? - alex */
goto skip_chunk;
break; // skip chunk
}
#endif
else if(len<8) break; // invalid chunk
switch(id){
case MOV_FOURCC('f','t','y','p'):
// skip over the file type chunk
// Here are my guesses on it's format (atmos):
// char[4] majorBrand (eg. 'isom')
// int minorVersion (eg. 0x00000000)
// char[4] mediaType(?) (eg. 'mp41')
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Skipping unsupported Filetype chunk (len: %d)!\n",
len);
break;
case MOV_FOURCC('m','o','o','v'):
// case MOV_FOURCC('c','m','o','v'):
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie header found!\n");
@ -268,7 +281,6 @@ int mov_check_file(demuxer_t* demuxer){
id = be2me_32(id);
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: unknown chunk: %.4s %d\n",&id,(int)len);
}
skip_chunk:
if(!stream_skip(demuxer->stream,len-skipped)) break;
++no;
}
@ -657,7 +669,7 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
int atom_len = char2int(trak->stdata,28);
switch(char2int(trak->stdata,32)) { // atom type
case MOV_FOURCC('e','s','d','s'):
mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: Found MPEG4 esds audio atom (%d)!\n", atom_len);
mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: Found MPEG4 audio Elementary Stream Descriptor atom (%d)!\n", atom_len);
if(atom_len >= 28)
mp_msg(MSGT_DEMUX, MSGL_INFO, "Audio compressed datarate: %dkbit/s\n",
char2int(trak->stdata,62)/1000);
@ -755,8 +767,8 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
atom_len);
break;
case MOV_FOURCC('e','s','d','s'):
// MPEG4 esds header
mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: Found MPEG4 esds movie atom (%d)!\n", atom_len);
// MPEG4 Elementary Stream Descriptor header
mp_msg(MSGT_DEMUX, MSGL_INFO, "MOV: Found MPEG4 movie Elementary Stream Descriptor atom (%d)!\n", atom_len);
// add code here to save esds header of length atom_len-8
// beginning at stdata[86] to some variable to pass it
// on to the decoder ::atmos
@ -769,13 +781,14 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
}
if(!sh->fps) sh->fps=trak->timescale;
sh->frametime=1.0f/sh->fps;
#if 0
sh->disp_w=trak->tkdata[77]|(trak->tkdata[76]<<8);
sh->disp_h=trak->tkdata[81]|(trak->tkdata[80]<<8);
#else
sh->disp_w=trak->stdata[25]|(trak->stdata[24]<<8);
sh->disp_h=trak->stdata[27]|(trak->stdata[26]<<8);
#endif
// if image size is zero, fallback to display size
if(!sh->disp_w && !sh->disp_h) {
sh->disp_w=trak->tkdata[77]|(trak->tkdata[76]<<8);
sh->disp_h=trak->tkdata[81]|(trak->tkdata[80]<<8);
}
if(depth&(~15)) printf("*** depht = 0x%X\n",depth);