shithub: aacenc

ref: f6c5b60489d8183f607f25ec87001969682a02d8
dir: /libfaac/huffman.h/

/*
 * FAAC - Freeware Advanced Audio Coder
 * Copyright (C) 2001 Menno Bakker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: huffman.h,v 1.4 2001/06/08 18:01:09 menno Exp $
 */

#ifndef HUFFMAN_H
#define HUFFMAN_H

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include "bitstream.h"
#include "coder.h"

/* Huffman tables */
#define MAXINDEX 289
#define NUMINTAB 2
#define FIRSTINTAB 0
#define LASTINTAB 1

#define INTENSITY_HCB 15
#define INTENSITY_HCB2 14


#define ABS(A) ((A) < 0 ? (-A) : (A))

#include "frame.h"

void HuffmanInit(CoderInfo *coderInfo, unsigned int numChannels);
void HuffmanEnd(CoderInfo *coderInfo, unsigned int numChannels);

int BitSearch(CoderInfo *coderInfo,
              int *quant);

int NoiselessBitCount(CoderInfo *coderInfo,
                      int *quant,
                      int hop,
                      int min_book_choice[112][3]);

static int CalculateEscSequence(int input, int *len_esc_sequence);

int CalcBits(CoderInfo *coderInfo,
             int book,
             int *quant,
             int offset,
             int length);

int OutputBits(CoderInfo *coderInfo,
               int book,
               int *quant,
               int offset,
               int length);

int SortBookNumbers(CoderInfo *coderInfo,
                    BitStream *bitStream,
                    int writeFlag);

int WriteScalefactors(CoderInfo *coderInfo,
                      BitStream *bitStream,
                      int writeFlag);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* HUFFMAN_H */