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avcodec/textdec: add some memory checks

This commit is contained in:
Clément Bœsch 2014-09-20 22:18:50 +02:00
parent 947a5111dd
commit 36c3a0167a
1 changed files with 5 additions and 6 deletions
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11
libavcodec/textdec.c
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@ -44,6 +44,7 @@ static const AVOption options[] = {
static int text_decode_frame(AVCodecContext *avctx, void *data,
int *got_sub_ptr, AVPacket *avpkt)
{
int ret = 0;
AVBPrint buf;
AVSubtitle *sub = data;
const char *ptr = avpkt->data;
@ -55,14 +56,12 @@ static int text_decode_frame(AVCodecContext *avctx, void *data,
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
if (ptr && avpkt->size > 0 && *ptr) {
ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup);
if (!av_bprint_is_complete(&buf)) {
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
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;
}