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100l (mpeg2 decoding fixed)

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Originally committed as revision 1756 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-04-11 21:15:17 +00:00
parent 6afd3b92b4
commit 9c00c3af90
2 changed files with 11 additions and 8 deletions
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16
libavcodec/mpeg12.c
View File

@ -821,7 +821,7 @@ static void init_vlcs(MpegEncContext *s)
init_vlc(&mv_vlc, MV_VLC_BITS, 17,
&mbMotionVectorTable[0][1], 2, 1,
&mbMotionVectorTable[0][0], 2, 1);
init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 35,
init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
&mbAddrIncrTable[0][1], 2, 1,
&mbAddrIncrTable[0][0], 2, 1);
init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
@ -1959,16 +1959,18 @@ static int mpeg_decode_slice(AVCodecContext *avctx,
for(;;) {
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
if (code < 0){
align_get_bits(&s->gb);
if(s->mb_skip_run != 0 || show_bits(&s->gb, 24) != 1){
fprintf(stderr, "slice end missmatch\n");
return -1;
}
goto eos; /* error = end of slice */
fprintf(stderr, "mb incr damaged\n");
return -1;
}
if (code >= 33) {
if (code == 33) {
s->mb_skip_run += 33;
}else if(code == 35){
if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
fprintf(stderr, "slice missmatch\n");
return -1;
}
goto eos; /* end of slice */
}
/* otherwise, stuffing, nothing to do */
} else {

3
libavcodec/mpeg12data.h
View File

@ -185,7 +185,7 @@ static RLTable rl_mpeg2 = {
mpeg1_level,
};
static const uint8_t mbAddrIncrTable[35][2] = {
static const uint8_t mbAddrIncrTable[36][2] = {
{0x1, 1},
{0x3, 3},
{0x2, 3},
@ -221,6 +221,7 @@ static const uint8_t mbAddrIncrTable[35][2] = {
{0x18, 11},
{0x8, 11}, /* escape */
{0xf, 11}, /* stuffing */
{0x0, 8}, /* end (and 15 more 0 bits should follow) */
};
static const uint8_t mbPatTable[63][2] = {