95 lines
4.1 KiB
C
95 lines
4.1 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: defines.h
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AUTHOR......: David Rowe
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DATE CREATED: 23/4/93
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Defines and structures used throughout the codec.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2009 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __DEFINES__
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#define __DEFINES__
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/*---------------------------------------------------------------------------*\
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DEFINES
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\*---------------------------------------------------------------------------*/
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/* General defines */
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#define N 80 /* number of samples per frame */
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#define MAX_AMP 80 /* maximum number of harmonics */
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#define PI 3.141592654 /* mathematical constant */
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#define TWO_PI 6.283185307 /* mathematical constant */
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#define FS 8000 /* sample rate in Hz */
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#define MAX_STR 256 /* maximum string size */
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#define NW 279 /* analysis window size */
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#define FFT_ENC 512 /* size of FFT used for encoder */
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#define FFT_DEC 512 /* size of FFT used in decoder */
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#define TW 40 /* Trapezoidal synthesis window overlap */
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#define V_THRESH 6.0 /* voicing threshold in dB */
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#define LPC_MAX 20 /* maximum LPC order */
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#define LPC_ORD 10 /* phase modelling LPC order */
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/* Pitch estimation defines */
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#define M 320 /* pitch analysis frame size */
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#define P_MIN 20 /* minimum pitch */
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#define P_MAX 160 /* maximum pitch */
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/*---------------------------------------------------------------------------*\
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TYPEDEFS
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\*---------------------------------------------------------------------------*/
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/* Structure to hold model parameters for one frame */
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typedef struct {
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float Wo; /* fundamental frequency estimate in radians */
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int L; /* number of harmonics */
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float A[MAX_AMP+1]; /* amplitiude of each harmonic */
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float phi[MAX_AMP+1]; /* phase of each harmonic */
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int voiced; /* non-zero if this frame is voiced */
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} MODEL;
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/* describes each codebook */
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struct lsp_codebook {
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int k; /* dimension of vector */
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int log2m; /* number of bits in m */
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int m; /* elements in codebook */
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const float * cb; /* The elements */
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};
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extern const struct lsp_codebook lsp_cb[];
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extern const struct lsp_codebook lsp_cbd[];
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extern const struct lsp_codebook lsp_cbvq[];
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extern const struct lsp_codebook lsp_cbjnd[];
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extern const struct lsp_codebook lsp_cbdt[];
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extern const struct lsp_codebook lsp_cbjvm[];
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extern const struct lsp_codebook lsp_cbvqanssi[];
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extern const struct lsp_codebook ge_cb[];
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#endif
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