ilbc_ulp.java

java的ilbc语音编码器,实现了其全部功能

/*
 * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */
package net.java.sip.communicator.impl.media.codec.audio.ilbc;

import java.lang.*;

/**
 * @author Jean Lorchat
 */
class ilbc_ulp {

    /* codec settings for encoder instance */

    int mode;

    int blockl;
    int nsub;
    int nasub;
    int lpc_n;
    int no_of_bytes;
    int no_of_words;
    int state_short_len;

    int lsf_bits[][];
    int start_bits[];
    int startfirst_bits[];
    int scale_bits[];
    int state_bits[];
    int extra_cb_index[][];
    int extra_cb_gain[][];
    int cb_index[][][];
    int cb_gain[][][];

    public ilbc_ulp(int init_mode)
    {
	mode = init_mode;

	if ( (mode != 20) && (mode != 30) )
	    {
		System.out.println("Unknown mode " + init_mode);
		return;
	    }

	lsf_bits = new int[6][ilbc_constants.ULP_CLASSES+2];
	start_bits = new int[ilbc_constants.ULP_CLASSES+2];
	startfirst_bits = new int[ilbc_constants.ULP_CLASSES+2];
	scale_bits = new int[ilbc_constants.ULP_CLASSES+2];
	state_bits = new int[ilbc_constants.ULP_CLASSES+2];
	extra_cb_index = new int[ilbc_constants.CB_NSTAGES][ilbc_constants.ULP_CLASSES+2];
	extra_cb_gain = new int[ilbc_constants.CB_NSTAGES][ilbc_constants.ULP_CLASSES+2];
	cb_index = new int[ilbc_constants.NSUB_MAX][ilbc_constants.CB_NSTAGES][ilbc_constants.ULP_CLASSES+2];
	cb_gain = new int[ilbc_constants.NSUB_MAX][ilbc_constants.CB_NSTAGES][ilbc_constants.ULP_CLASSES+2];

	if (mode == 20)
	    {
		blockl = ilbc_constants.BLOCKL_20MS;
		nsub = ilbc_constants.NSUB_20MS;
		nasub = ilbc_constants.NASUB_20MS;
		lpc_n = ilbc_constants.LPC_N_20MS;
		no_of_bytes = ilbc_constants.NO_OF_BYTES_20MS;
		no_of_words = ilbc_constants.NO_OF_WORDS_20MS;
		state_short_len = ilbc_constants.STATE_SHORT_LEN_20MS;
		/* ULP init */
		//	       iLBCenc_inst->ULP_inst=&ULP_20msTbl;
		System.arraycopy(ilbc_constants.lsf_bits_20ms, 0, lsf_bits, 0, 6);
		System.arraycopy(ilbc_constants.start_bits_20ms, 0, start_bits, 0, ilbc_constants.start_bits_20ms.length);
		System.arraycopy(ilbc_constants.startfirst_bits_20ms, 0, startfirst_bits, 0, ilbc_constants.startfirst_bits_20ms.length);
		System.arraycopy(ilbc_constants.scale_bits_20ms, 0, scale_bits, 0, ilbc_constants.scale_bits_20ms.length);
		System.arraycopy(ilbc_constants.state_bits_20ms, 0, state_bits, 0, ilbc_constants.state_bits_20ms.length);
		System.arraycopy(ilbc_constants.extra_cb_index_20ms, 0, extra_cb_index, 0, ilbc_constants.CB_NSTAGES);
		System.arraycopy(ilbc_constants.extra_cb_gain_20ms, 0, extra_cb_gain, 0, ilbc_constants.CB_NSTAGES);
		System.arraycopy(ilbc_constants.cb_index_20ms, 0, cb_index, 0, ilbc_constants.NSUB_20MS);
		System.arraycopy(ilbc_constants.cb_gain_20ms, 0, cb_gain, 0, ilbc_constants.NSUB_20MS);
	    }
	else if (mode == 30)
	    {
		blockl = ilbc_constants.BLOCKL_30MS;
		nsub = ilbc_constants.NSUB_30MS;
		nasub = ilbc_constants.NASUB_30MS;
		lpc_n = ilbc_constants.LPC_N_30MS;
		no_of_bytes = ilbc_constants.NO_OF_BYTES_30MS;
		no_of_words = ilbc_constants.NO_OF_WORDS_30MS;
		state_short_len = ilbc_constants.STATE_SHORT_LEN_30MS;
		/* ULP init */
		//	       ULP_inst=&ULP_30msTbl;
		System.arraycopy(ilbc_constants.lsf_bits_30ms, 0, lsf_bits, 0, 6);
		System.arraycopy(ilbc_constants.start_bits_30ms, 0, start_bits, 0, ilbc_constants.start_bits_30ms.length);
		System.arraycopy(ilbc_constants.startfirst_bits_30ms, 0, startfirst_bits, 0, ilbc_constants.startfirst_bits_30ms.length);
		System.arraycopy(ilbc_constants.scale_bits_30ms, 0, scale_bits, 0, ilbc_constants.scale_bits_30ms.length);
		System.arraycopy(ilbc_constants.state_bits_30ms, 0, state_bits, 0, ilbc_constants.state_bits_30ms.length);
		System.arraycopy(ilbc_constants.extra_cb_index_30ms, 0, extra_cb_index, 0, ilbc_constants.CB_NSTAGES);
		System.arraycopy(ilbc_constants.extra_cb_gain_30ms, 0, extra_cb_gain, 0, ilbc_constants.CB_NSTAGES);
		//		System.out.println("nsubmax vaut: " + NSUB_MAX + " vs " + NSUB_30MS + ", alors que la taille de la table est: " + cb_index_30ms.length + " vs " + cb_index.length);
		System.arraycopy(ilbc_constants.cb_index_30ms, 0, cb_index, 0, ilbc_constants.NSUB_30MS);
		System.arraycopy(ilbc_constants.cb_gain_30ms, 0, cb_gain, 0, ilbc_constants.NSUB_30MS);
	    }

	// 	for (int i = 0; i < NSUB_MAX; i++) {
	// 	    for (int j = 0; j < CB_NSTAGES; j++) {
	// 		for (int k = 0; k < ULP_CLASSES+2; k++) {
	// 		    System.out.print(" " + cb_gain[i][j][k]);
	// 		}
	// 		System.out.print(" | ");
	// 	    }
	// 	    System.out.println("");
	// 	}
    }
}