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mov_check_file 64bit support by Chris Bednar. also fixed co64 chunk and added warnings for 64bit files reading without largefiles support 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4000 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex 2002-01-05 19:29:52 +00:00
parent ae478fadb8
commit 082d9e80ba
1 changed files with 22 additions and 14 deletions
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36
libmpdemux/demux_mov.c
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@ -51,7 +51,7 @@ typedef struct {
typedef struct {
int id;
int type;
int pos;
off_t pos;
//
int timescale;
unsigned int length;
@ -198,21 +198,34 @@ int mov_check_file(demuxer_t* demuxer){
demuxer->priv=priv;
while(1){
int skipped=8;
off_t len=stream_read_dword(demuxer->stream);
unsigned int id=stream_read_dword(demuxer->stream);
if(stream_eof(demuxer->stream)) break; // EOF
if(len<8) break; // invalid chunk
if (len == 1) /* real size is 64bits - cjb */
{
#ifndef _LARGEFILE_SOURCE
if (stream_read_dword(demuxer->stream) != 0)
mp_msg(MSGT_DEMUX, MSGL_WARN, "64bit file, but you've MPlayer compiled without LARGEFILE support!\n");
len = stream_read_dword(demuxer->stream);
#else
len = stream_read_qword(demuxer->stream);
#endif
skipped += 8;
}
else if(len<8) break; // invalid chunk
switch(id){
case MOV_FOURCC('m','o','o','v'):
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie header found!\n");
priv->moov_start=stream_tell(demuxer->stream);
priv->moov_end=priv->moov_start+len-8;
priv->moov_end=priv->moov_start+len-skipped;
flags|=1;
break;
case MOV_FOURCC('m','d','a','t'):
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie DATA found!\n");
priv->mdat_start=stream_tell(demuxer->stream);
priv->mdat_end=priv->mdat_start+len-8;
priv->mdat_end=priv->mdat_start+len-skipped;
flags|=2;
break;
case MOV_FOURCC('f','r','e','e'):
@ -226,7 +239,7 @@ int mov_check_file(demuxer_t* demuxer){
id = bswap_32(id);
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: unknown chunk: %.4s %d\n",&id,(int)len);
}
if(!stream_skip(demuxer->stream,len-8)) break;
if(!stream_skip(demuxer->stream,len-skipped)) break;
++no;
}
@ -429,17 +442,12 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
// read elements:
for(i=0;i<len;i++)
{
int len1=stream_read_dword(demuxer->stream);
int len2=stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX, MSGL_DBG3, "Chunk #%d: len1=%d, len2=%d\n", i, len1, len2);
#ifndef _LARGEFILE_SOURCE /* is this right ?! -- alex */
if (len1)
#ifndef _LARGEFILE_SOURCE
if (stream_read_dword(demuxer->stream) != 0)
mp_msg(MSGT_DEMUX, MSGL_WARN, "Chunk %d has got 64bit address, but you've MPlayer compiled without LARGEFILE support!\n", i);
trak->chunks[i].pos = len2;
trak->chunks[i].pos = stream_read_dword(demuxer->stream);
#else
trak->chunks[i].pos = len1+len2; /* also off_t pos -> on 64bit platform off_t MUST be 64bit */
trak->chunks[i].pos = stream_read_qword(demuxer->stream);
#endif
}
break;