PeerStreamer

int ff_ac3_parse_header_full(GetBitContext *gbc, AC3HeaderInfo *hdr){

    int ret, i;

    ret = ff_ac3_parse_header(gbc, hdr);

    if(!ret){

        if(hdr->bitstream_id>10){

            /* Enhanced AC-3 */

            skip_bits(gbc, 5); // skip bitstream id

            /* skip dialog normalization and compression gain */

            for (i = 0; i < (hdr->channel_mode ? 1 : 2); i++) {

                skip_bits(gbc, 5); // skip dialog normalization

                if (get_bits1(gbc)) {

                    skip_bits(gbc, 8); //skip Compression gain word

                }

            }

            /* dependent stream channel map */

            if (hdr->frame_type == EAC3_FRAME_TYPE_DEPENDENT && get_bits1(gbc)) {

                    hdr->channel_map = get_bits(gbc, 16); //custom channel map

                    return 0;

            }

        }

        //default channel map based on acmod and lfeon

        hdr->channel_map = ff_eac3_default_chmap[hdr->channel_mode];

        if(hdr->lfe_on)

            hdr->channel_map |= AC3_CHMAP_LFE;

    }

    return ret;

}