opus_duration     135 libavformat/oggparseopus.c         d = opus_duration(last_pkt, os->psize);
opus_duration     145 libavformat/oggparseopus.c                 int d = opus_duration(last_pkt, next_pkt - last_pkt);
opus_duration     155 libavformat/oggparseopus.c     if ((ret = opus_duration(packet, os->psize)) < 0)