Function encodeSideInfo2

web/static/js/mp3-engine.js:2625–2785

(gfp, bitsPerFrame)

    };

    function encodeSideInfo2(gfp, bitsPerFrame) {
        var gfc = gfp.internal_flags;
        var l3_side;
        var gr, ch;

        l3_side = gfc.l3_side;
        gfc.header[gfc.h_ptr].ptr = 0;
        Arrays.fill(gfc.header[gfc.h_ptr].buf, 0, gfc.sideinfo_len, 0);
        if (gfp.out_samplerate < 16000)
            writeheader(gfc, 0xffe, 12);
        else
            writeheader(gfc, 0xfff, 12);
        writeheader(gfc, (gfp.version), 1);
        writeheader(gfc, 4 - 3, 2);
        writeheader(gfc, (!gfp.error_protection ? 1 : 0), 1);
        writeheader(gfc, (gfc.bitrate_index), 4);
        writeheader(gfc, (gfc.samplerate_index), 2);
        writeheader(gfc, (gfc.padding), 1);
        writeheader(gfc, (gfp.extension), 1);
        writeheader(gfc, (gfp.mode.ordinal()), 2);
        writeheader(gfc, (gfc.mode_ext), 2);
        writeheader(gfc, (gfp.copyright), 1);
        writeheader(gfc, (gfp.original), 1);
        writeheader(gfc, (gfp.emphasis), 2);
        if (gfp.error_protection) {
            writeheader(gfc, 0, 16);
            /* dummy */
        }

        if (gfp.version == 1) {
            /* MPEG1 */
            writeheader(gfc, (l3_side.main_data_begin), 9);

            if (gfc.channels_out == 2)
                writeheader(gfc, l3_side.private_bits, 3);
            else
                writeheader(gfc, l3_side.private_bits, 5);

            for (ch = 0; ch < gfc.channels_out; ch++) {
                var band;
                for (band = 0; band < 4; band++) {
                    writeheader(gfc, l3_side.scfsi[ch][band], 1);
                }
            }

            for (gr = 0; gr < 2; gr++) {
                for (ch = 0; ch < gfc.channels_out; ch++) {
                    var gi = l3_side.tt[gr][ch];
                    writeheader(gfc, gi.part2_3_length + gi.part2_length, 12);
                    writeheader(gfc, gi.big_values / 2, 9);
                    writeheader(gfc, gi.global_gain, 8);
                    writeheader(gfc, gi.scalefac_compress, 4);

                    if (gi.block_type != Encoder.NORM_TYPE) {
                        writeheader(gfc, 1, 1);
                        /* window_switching_flag */
                        writeheader(gfc, gi.block_type, 2);
                        writeheader(gfc, gi.mixed_block_flag, 1);