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avcodec/mpl2dec: add some memory checks

This commit is contained in:
Clément Bœsch 2014-09-20 22:02:26 +02:00
parent e833b02f2f
commit 27a9bee243
1 changed files with 6 additions and 8 deletions
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14
libavcodec/mpl2dec.c
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@ -66,6 +66,7 @@ static int mpl2_event_to_ass(AVBPrint *buf, const char *p)
static int mpl2_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;
@ -74,15 +75,12 @@ static int mpl2_decode_frame(AVCodecContext *avctx, void *data,
av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr)) {
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);
}
*got_sub_ptr = sub->num_rects > 0;
if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr))
ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_duration, 0);
av_bprint_finalize(&buf, NULL);
if (ret < 0)
return ret;
*got_sub_ptr = sub->num_rects > 0;
return avpkt->size;
}