70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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* Project 25 IMBE Encoder/Decoder Fixed-Point implementation
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* Developed by Pavel Yazev E-mail: pyazev@gmail.com
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* Version 1.0 (c) Copyright 2009
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* The software is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Boston, MA
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* 02110-1301, USA.
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*/
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#ifndef _IMBE
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#define _IMBE
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#include "typedef.h"
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#define FRAME 160 // Number samples in frame
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#define NUM_HARMS_MAX 56 // Maximum number of harmonics
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#define NUM_HARMS_MIN 9 // Minimum number of harmonics
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#define NUM_BANDS_MAX 12 // Maximum number of bands
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#define MAX_BLOCK_LEN 10 // Maximum length of block used during spectral amplitude encoding
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#define NUM_PRED_RES_BLKS 6 // Number of Prediction Residual Blocks
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#define PE_LPF_ORD 21 // Order of Pitch estimation LPF
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#define PITCH_EST_FRAME 301 // Pitch estimation frame size
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#define B_NUM (NUM_HARMS_MAX - 1)
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typedef struct
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{
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Word16 e_p;
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Word16 pitch; // Q14.2
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Word16 ref_pitch; // Q8.8
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Word32 fund_freq;
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Word16 num_harms;
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Word16 num_bands;
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Word16 v_uv_dsn[NUM_HARMS_MAX];
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Word16 b_vec[NUM_HARMS_MAX + 3];
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Word16 bit_alloc[B_NUM + 4];
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Word16 sa[NUM_HARMS_MAX];
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Word16 l_uv;
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Word16 div_one_by_num_harm;
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Word16 div_one_by_num_harm_sh;
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} IMBE_PARAM;
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typedef struct
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{
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Word16 re;
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Word16 im;
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} Cmplx16;
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#if 0
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void decode_init(IMBE_PARAM *imbe_param);
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void decode(IMBE_PARAM *imbe_param, Word16 *frame_vector, Word16 *snd);
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#endif
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#endif
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