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lavc/ass: error if not passed exactly 1 rect

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This never produced valid output.
This commit is contained in:
rcombs 2023-03-08 15:33:24 -06:00
parent b68a6ba469
commit c0d9327a63
1 changed files with 17 additions and 18 deletions
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35
libavcodec/assenc.c
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@ -45,27 +45,26 @@ static int ass_encode_frame(AVCodecContext *avctx,
unsigned char *buf, int bufsize,
const AVSubtitle *sub)
{
int i, len, total_len = 0;
int len;
for (i=0; i<sub->num_rects; i++) {
const char *ass = sub->rects[i]->ass;
if (sub->rects[i]->type != SUBTITLE_ASS) {
av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
return AVERROR(EINVAL);
}
len = av_strlcpy(buf+total_len, ass, bufsize-total_len);
if (len > bufsize-total_len-1) {
av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
return AVERROR_BUFFER_TOO_SMALL;
}
total_len += len;
if (sub->num_rects != 1) {
av_log(avctx, AV_LOG_ERROR, "Only one rect per AVSubtitle is supported in ASS.\n");
return AVERROR_INVALIDDATA;
}
return total_len;
if (sub->rects[0]->type != SUBTITLE_ASS) {
av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
return AVERROR(EINVAL);
}
len = av_strlcpy(buf, sub->rects[0]->ass, bufsize);
if (len > bufsize - 1) {
av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
return AVERROR_BUFFER_TOO_SMALL;
}
return len;
}
#if CONFIG_SSA_ENCODER