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avcodec/microdvddec: add some memory checks

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This commit is contained in:
Clément Bœsch 2014-09-20 21:58:27 +02:00
parent 4c85073044
commit ac95b436db
1 changed files with 7 additions and 8 deletions
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15
libavcodec/microdvddec.c
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@ -261,7 +261,6 @@ static int microdvd_decode_frame(AVCodecContext *avctx,
AVSubtitle *sub = data;
AVBPrint new_line;
char c;
char *decoded_sub;
char *line = avpkt->data;
char *end = avpkt->data + avpkt->size;
struct microdvd_tag tags[sizeof(MICRODVD_TAGS) - 1] = {{0}};
@ -301,18 +300,18 @@ static int microdvd_decode_frame(AVCodecContext *avctx,
}
}
if (new_line.len) {
av_bprintf(&new_line, "\r\n");
av_bprint_finalize(&new_line, &decoded_sub);
if (*decoded_sub) {
int ret;
int64_t start = avpkt->pts;
int64_t duration = avpkt->duration;
int ts_start = av_rescale_q(start, avctx->time_base, (AVRational){1,100});
int ts_duration = duration != -1 ?
av_rescale_q(duration, avctx->time_base, (AVRational){1,100}) : -1;
ff_ass_add_rect(sub, decoded_sub, ts_start, ts_duration, 0);
}
av_free(decoded_sub);
av_bprintf(&new_line, "\r\n");
ret = ff_ass_add_rect_bprint(sub, &new_line, ts_start, ts_duration, 0);
av_bprint_finalize(&new_line, NULL);
if (ret < 0)
return ret;
}
*got_sub_ptr = sub->num_rects > 0;