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avcodec/subviewerdec: add some memory checks
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@ -51,6 +51,7 @@ static int subviewer_decode_frame(AVCodecContext *avctx,
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void *data, int *got_sub_ptr, AVPacket *avpkt)
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{
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char c;
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int ret = 0;
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AVSubtitle *sub = data;
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const char *ptr = avpkt->data;
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AVBPrint buf;
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@ -67,9 +68,11 @@ static int subviewer_decode_frame(AVCodecContext *avctx,
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// note: no need to rescale pts & duration since they are in the same
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// timebase as ASS (1/100)
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if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
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ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0);
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*got_sub_ptr = sub->num_rects > 0;
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ret = ff_ass_add_rect_bprint(sub, &buf, avpkt->pts, avpkt->duration, 0);
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av_bprint_finalize(&buf, NULL);
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if (ret < 0)
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return ret;
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*got_sub_ptr = sub->num_rects > 0;
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return avpkt->size;
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}
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