static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) { KLVPacket klv; while (!s->pb->eof_reached) { if (klv_read_packet(&klv, s->pb) < 0) return -1; PRINT_KEY(s, "read packet", klv.key); av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset); if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { int res = mxf_decrypt_triplet(s, pkt, &klv); if (res < 0) { av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); return -1; } return 0; } if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { int index = mxf_get_stream_index(s, &klv); if (index < 0) { av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); goto skip; } if (s->streams[index]->discard == AVDISCARD_ALL) goto skip; /* check for 8 channels AES3 element */ if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) { av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); return -1; } } else av_get_packet(s->pb, pkt, klv.length); pkt->stream_index = index; pkt->pos = klv.offset; return 0; } else skip: avio_skip(s->pb, klv.length); } return AVERROR_EOF; }