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C

/*
* Project 25 IMBE Encoder/Decoder Fixed-Point implementation
* Developed by Pavel Yazev E-mail: pyazev@gmail.com
* Version 1.0 (c) Copyright 2009
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* The software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Boston, MA
* 02110-1301, USA.
*/
#ifndef _IMBE
#define _IMBE
#include "typedef.h"
#define FRAME 160 // Number samples in frame
#define NUM_HARMS_MAX 56 // Maximum number of harmonics
#define NUM_HARMS_MIN 9 // Minimum number of harmonics
#define NUM_BANDS_MAX 12 // Maximum number of bands
#define MAX_BLOCK_LEN 10 // Maximum length of block used during spectral amplitude encoding
#define NUM_PRED_RES_BLKS 6 // Number of Prediction Residual Blocks
#define PE_LPF_ORD 21 // Order of Pitch estimation LPF
#define PITCH_EST_FRAME 301 // Pitch estimation frame size
#define B_NUM (NUM_HARMS_MAX - 1)
typedef struct
{
Word16 e_p;
Word16 pitch; // Q14.2
Word16 ref_pitch; // Q8.8
Word32 fund_freq;
Word16 num_harms;
Word16 num_bands;
Word16 v_uv_dsn[NUM_HARMS_MAX];
Word16 b_vec[NUM_HARMS_MAX + 3];
Word16 bit_alloc[B_NUM + 4];
Word16 sa[NUM_HARMS_MAX];
Word16 l_uv;
Word16 div_one_by_num_harm;
Word16 div_one_by_num_harm_sh;
} IMBE_PARAM;
typedef struct
{
Word16 re;
Word16 im;
} Cmplx16;
#if 0
void decode_init(IMBE_PARAM *imbe_param);
void decode(IMBE_PARAM *imbe_param, Word16 *frame_vector, Word16 *snd);
#endif
#endif