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avcodec/webvttdec: add some memory checks

This commit is contained in:
Clément Bœsch 2014-09-20 22:20:05 +02:00
parent 36c3a0167a
commit ce8dc93aef
1 changed files with 5 additions and 2 deletions
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7
libavcodec/webvttdec.c
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@ -74,6 +74,7 @@ static int webvtt_event_to_ass(AVBPrint *buf, const char *p)
static int webvtt_decode_frame(AVCodecContext *avctx,
void *data, int *got_sub_ptr, AVPacket *avpkt)
{
int ret = 0;
AVSubtitle *sub = data;
const char *ptr = avpkt->data;
AVBPrint buf;
@ -83,10 +84,12 @@ static int webvtt_decode_frame(AVCodecContext *avctx,
int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100});
int ts_duration = avpkt->duration != -1 ?
av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;
ff_ass_add_rect(sub, buf.str, ts_start, ts_duration, 0);
ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_duration, 0);
}
*got_sub_ptr = sub->num_rects > 0;
av_bprint_finalize(&buf, NULL);
if (ret < 0)
return ret;
*got_sub_ptr = sub->num_rects > 0;
return avpkt->size;
}