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hmm ABS(dc-diff) > 512 fix

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printing some error messages if some error occurs

Originally committed as revision 774 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-07-17 15:54:56 +00:00
parent 9be42dba97
commit 9ac7ecd698
1 changed files with 36 additions and 14 deletions
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50
libavcodec/mpeg12.c
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@ -588,10 +588,10 @@ void mpeg1_init_vlc(MpegEncContext *s)
if (!done) {
done = 1;
init_vlc(&dc_lum_vlc, DC_VLC_BITS, 10/*12*/,
init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
vlc_dc_lum_bits, 1, 1,
vlc_dc_lum_code, 2, 2);
init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 10/*12*/,
init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
vlc_dc_chroma_bits, 1, 1,
vlc_dc_chroma_code, 2, 2);
init_vlc(&mv_vlc, MV_VLC_BITS, 17,
@ -674,8 +674,10 @@ static int mpeg_decode_mb(MpegEncContext *s,
}
if (++s->mb_x >= s->mb_width) {
s->mb_x = 0;
if (s->mb_y >= (s->mb_height - 1))
if (s->mb_y >= (s->mb_height - 1)){
fprintf(stderr, "slice too long\n");
return -1;
}
s->mb_y++;
}
dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
@ -716,13 +718,17 @@ static int mpeg_decode_mb(MpegEncContext *s,
break;
case P_TYPE:
mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
if (mb_type < 0)
if (mb_type < 0){
fprintf(stderr, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
break;
case B_TYPE:
mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
if (mb_type < 0)
if (mb_type < 0){
fprintf(stderr, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
break;
}
dprintf("mb_type=%x\n", mb_type);
@ -891,8 +897,10 @@ static int mpeg_decode_mb(MpegEncContext *s,
if (mb_type & MB_PAT) {
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
if (cbp < 0)
if (cbp < 0){
fprintf(stderr, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
cbp++;
}
dprintf("cbp=%x\n", cbp);
@ -968,12 +976,14 @@ static inline int decode_dc(MpegEncContext *s, int component)
int code, diff;
if (component == 0) {
code = get_vlc2(&s->gb, dc_lum_vlc.table, DC_VLC_BITS, 1);
code = get_vlc2(&s->gb, dc_lum_vlc.table, DC_VLC_BITS, 2);
} else {
code = get_vlc2(&s->gb, dc_chroma_vlc.table, DC_VLC_BITS, 1);
code = get_vlc2(&s->gb, dc_chroma_vlc.table, DC_VLC_BITS, 2);
}
if (code < 0)
if (code < 0){
fprintf(stderr, "invalid dc code at %d %d\n", s->mb_x, s->mb_y);
return 0xffff;
}
if (code == 0) {
diff = 0;
} else {
@ -1102,8 +1112,10 @@ static int mpeg2_decode_block_non_intra(MpegEncContext *s,
/* now quantify & encode AC coefs */
for(;;) {
code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2);
if (code < 0)
if (code < 0){
fprintf(stderr, "invalid ac code at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if (code == 112) {
break;
} else if (code == 111) {
@ -1118,8 +1130,10 @@ static int mpeg2_decode_block_non_intra(MpegEncContext *s,
level = -level;
}
i += run;
if (i >= 64)
if (i >= 64){
fprintf(stderr, "run too long at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
add_coef:
j = scan_table[i];
dprintf("%d: run=%d level=%d\n", n, run, level);
@ -1181,8 +1195,10 @@ static int mpeg2_decode_block_intra(MpegEncContext *s,
/* now quantify & encode AC coefs */
for(;;) {
code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2);
if (code < 0)
if (code < 0){
fprintf(stderr, "invalid ac code at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if (code == 112) {
break;
} else if (code == 111) {
@ -1197,8 +1213,10 @@ static int mpeg2_decode_block_intra(MpegEncContext *s,
level = -level;
}
i += run;
if (i >= 64)
if (i >= 64){
fprintf(stderr, "run too long at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
j = scan_table[i];
dprintf("%d: run=%d level=%d\n", n, run, level);
level = (level * s->qscale * matrix[j]) / 16;
@ -1440,8 +1458,10 @@ static int mpeg_decode_slice(AVCodecContext *avctx,
int ret;
start_code = (start_code - 1) & 0xff;
if (start_code >= s->mb_height)
if (start_code >= s->mb_height){
fprintf(stderr, "slice below image\n");
return -1;
}
s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
s->last_dc[1] = s->last_dc[0];
s->last_dc[2] = s->last_dc[0];
@ -1735,6 +1755,8 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
}
*data_size = sizeof(AVPicture);
goto the_end;
}else if(ret==-1){
printf("Error while decoding slice\n");
}
}
break;