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few more error checks 

Originally committed as revision 2021 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-07-08 22:12:17 +00:00
parent 3f6f76afef
commit 0273ceebbd
1 changed files with 9 additions and 4 deletions
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13
libavcodec/mjpeg.c
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@ -842,7 +842,7 @@ typedef struct MJpegDecodeContext {
static int mjpeg_decode_dht(MJpegDecodeContext *s);
static void build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
int nb_codes)
{
uint8_t huff_size[256];
@ -851,7 +851,7 @@ static void build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_ta
memset(huff_size, 0, sizeof(huff_size));
build_huffman_codes(huff_size, huff_code, bits_table, val_table);
init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2);
return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2);
}
static int mjpeg_decode_init(AVCodecContext *avctx)
@ -970,7 +970,9 @@ static int mjpeg_decode_dht(MJpegDecodeContext *s)
free_vlc(&s->vlcs[class][index]);
dprintf("class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1);
if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1) < 0){
return -1;
}
}
return 0;
}
@ -1778,7 +1780,10 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
mjpeg_decode_dqt(s);
break;
case DHT:
mjpeg_decode_dht(s);
if(mjpeg_decode_dht(s) < 0){
fprintf(stderr, "huffman table decode error\n");
return -1;
}
break;
case SOF0:
s->lossless=0;