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Code Issues Releases Activity

fixes rv10 decoding crash

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Originally committed as revision 873 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-08-28 09:19:28 +00:00
parent 0778718635
commit ee3b2be65d
1 changed files with 8 additions and 1 deletions
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9
libavcodec/rv10.c
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@ -296,6 +296,10 @@ static int rv10_decode_picture_header(MpegEncContext *s)
return -1; return -1;
s->qscale = get_bits(&s->gb, 5); s->qscale = get_bits(&s->gb, 5);
if(s->qscale==0){
fprintf(stderr, "error, qscale:0\n");
return -1;
}
if (s->pict_type == I_TYPE) { if (s->pict_type == I_TYPE) {
if (s->rv10_version == 3) { if (s->rv10_version == 3) {
@ -322,7 +326,7 @@ static int rv10_decode_picture_header(MpegEncContext *s)
s->mb_y = 0; s->mb_y = 0;
mb_count = s->mb_width * s->mb_height; mb_count = s->mb_width * s->mb_height;
} }
//printf("%d\n", get_bits(&s->gb, 3));
get_bits(&s->gb, 3); /* ignored */ get_bits(&s->gb, 3); /* ignored */
s->f_code = 1; s->f_code = 1;
s->unrestricted_mv = 1; s->unrestricted_mv = 1;
@ -353,6 +357,9 @@ static int rv10_decode_init(AVCodecContext *avctx)
h263_decode_init_vlc(s); h263_decode_init_vlc(s);
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
/* init rv vlc */ /* init rv vlc */
if (!done) { if (!done) {
init_vlc(&rv_dc_lum, DC_VLC_BITS, 256, init_vlc(&rv_dc_lum, DC_VLC_BITS, 256,