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/*---------------------------------------------------------------------------*\
FILE........: defines.h
AUTHOR......: David Rowe
DATE CREATED: 23/4/93
Defines and structures used throughout the codec.
\*---------------------------------------------------------------------------*/
/*
Copyright (C) 2009 David Rowe
All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License version 2.1, as
published by the Free Software Foundation. This program 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 Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DEFINES__
#define __DEFINES__
/*---------------------------------------------------------------------------*\
DEFINES
\*---------------------------------------------------------------------------*/
/* General defines */
#define N 80 /* number of samples per frame */
#define MAX_AMP 80 /* maximum number of harmonics */
#define PI 3.141592654 /* mathematical constant */
#define TWO_PI 6.283185307 /* mathematical constant */
#define FS 8000 /* sample rate in Hz */
#define MAX_STR 256 /* maximum string size */
#define NW 279 /* analysis window size */
#define FFT_ENC 512 /* size of FFT used for encoder */
#define FFT_DEC 512 /* size of FFT used in decoder */
#define TW 40 /* Trapezoidal synthesis window overlap */
#define V_THRESH 6.0 /* voicing threshold in dB */
#define LPC_MAX 20 /* maximum LPC order */
#define LPC_ORD 10 /* phase modelling LPC order */
/* Pitch estimation defines */
#define M 320 /* pitch analysis frame size */
#define P_MIN 20 /* minimum pitch */
#define P_MAX 160 /* maximum pitch */
/*---------------------------------------------------------------------------*\
TYPEDEFS
\*---------------------------------------------------------------------------*/
/* Structure to hold model parameters for one frame */
typedef struct {
float Wo; /* fundamental frequency estimate in radians */
int L; /* number of harmonics */
float A[MAX_AMP]; /* amplitiude of each harmonic */
float phi[MAX_AMP]; /* phase of each harmonic */
int voiced; /* non-zero if this frame is voiced */
} MODEL;
/* describes each codebook */
struct lsp_codebook {
int k; /* dimension of vector */
int log2m; /* number of bits in m */
int m; /* elements in codebook */
const float * cb; /* The elements */
};
extern const struct lsp_codebook lsp_cb[];
extern const struct lsp_codebook lsp_cbd[];
extern const struct lsp_codebook lsp_cbdvq[];
#endif
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