bitrate_manager_state.java

/*
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.
 *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002
 * by the Xiph.Org Foundation http://www.xiph.org/
 */

package org.xiph.libvorbis;

import static org.xiph.libvorbis.vorbis_constants.integer_constants.*;

class bitrate_manager_state {

    int managed;

    int avg_reservoir;        // long
    int minmax_reservoir;    // long
    int avg_bitsper;        // long
    int min_bitsper;        // long
    int max_bitsper;        // long

    int short_per_long;        // long
    float avgfloat;            // double

    vorbis_block vb;
    int choice;


    public bitrate_manager_state(vorbis_info vi) {

        codec_setup_info ci = vi.codec_setup;
        bitrate_manager_info bi = ci.bi;

        if (bi.reservoir_bits > 0) {

            int ratesamples = vi.rate;
            int halfsamples = ci.blocksizes[0] >> 1;

            short_per_long = ci.blocksizes[1] / ci.blocksizes[0];
            managed = 1;

            avg_bitsper = new Double(Math.rint(1. * bi.avg_rate * halfsamples / ratesamples)).intValue();
            min_bitsper = new Double(Math.rint(1. * bi.min_rate * halfsamples / ratesamples)).intValue();
            max_bitsper = new Double(Math.rint(1. * bi.max_rate * halfsamples / ratesamples)).intValue();

            avgfloat = PACKETBLOBS / 2;

            // not a necessary fix, but one that leads to a more balanced typical initialization
            {
                int desired_fill = new Float(bi.reservoir_bits * bi.reservoir_bias).intValue();    // long
                minmax_reservoir = desired_fill;
                avg_reservoir = desired_fill;
            }
        }
    }
}