1 /*---------------------------------------------------------------------------*\ 2 3 FILE........: defines.h 4 AUTHOR......: David Rowe 5 DATE CREATED: 23/4/93 6 7 Defines and structures used throughout the codec. 8 9 \*---------------------------------------------------------------------------*/ 10 11 /* 12 Copyright (C) 2009 David Rowe 13 14 All rights reserved. 15 16 This program is free software; you can redistribute it and/or modify 17 it under the terms of the GNU Lesser General Public License version 2.1, as 18 published by the Free Software Foundation. This program is 19 distributed in the hope that it will be useful, but WITHOUT ANY 20 WARRANTY; without even the implied warranty of MERCHANTABILITY or 21 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 22 License for more details. 23 24 You should have received a copy of the GNU Lesser General Public License 25 along with this program; if not, see <http://www.gnu.org/licenses/>. 26 */ 27 28 #ifndef __DEFINES__ 29 #define __DEFINES__ 30 31 /*---------------------------------------------------------------------------*\ 32 33 DEFINES 34 35 \*---------------------------------------------------------------------------*/ 36 37 /* General defines */ 38 39 #define N_S 0.01 /* internal proc frame length in secs */ 40 #define TW_S 0.005 /* trapezoidal synth window overlap */ 41 #define MAX_AMP 160 /* maximum number of harmonics */ 42 #ifndef PI 43 #define PI 3.141592654 /* mathematical constant */ 44 #endif 45 #define TWO_PI 6.283185307 /* mathematical constant */ 46 #define MAX_STR 2048 /* maximum string size */ 47 48 #define FFT_ENC 512 /* size of FFT used for encoder */ 49 #define FFT_DEC 512 /* size of FFT used in decoder */ 50 #define V_THRESH 6.0 /* voicing threshold in dB */ 51 #define LPC_ORD 10 /* LPC order */ 52 #define LPC_ORD_LOW 6 /* LPC order for lower rates */ 53 54 /* Pitch estimation defines */ 55 56 #define M_PITCH_S 0.0400 /* pitch analysis window in s */ 57 #define P_MIN_S 0.0025 /* minimum pitch period in s */ 58 #define P_MAX_S 0.0200 /* maximum pitch period in s */ 59 60 /*---------------------------------------------------------------------------*\ 61 62 TYPEDEFS 63 64 \*---------------------------------------------------------------------------*/ 65 66 /* Structure to hold constants calculated at run time based on sample rate */ 67 68 typedef struct { 69 int Fs; /* sample rate of this instance */ 70 int n_samp; /* number of samples per 10ms frame at Fs */ 71 int max_amp; /* maximum number of harmonics */ 72 int m_pitch; /* pitch estimation window size in samples */ 73 int p_min; /* minimum pitch period in samples */ 74 int p_max; /* maximum pitch period in samples */ 75 float Wo_min; 76 float Wo_max; 77 int nw; /* analysis window size in samples */ 78 int tw; /* trapezoidal synthesis window overlap */ 79 } C2CONST; 80 81 /* Structure to hold model parameters for one frame */ 82 83 typedef struct { 84 float Wo; /* fundamental frequency estimate in radians */ 85 int L; /* number of harmonics */ 86 float A[MAX_AMP+1]; /* amplitiude of each harmonic */ 87 float phi[MAX_AMP+1]; /* phase of each harmonic */ 88 int voiced; /* non-zero if this frame is voiced */ 89 } MODEL; 90 91 /* describes each codebook */ 92 93 struct lsp_codebook { 94 int k; /* dimension of vector */ 95 int log2m; /* number of bits in m */ 96 int m; /* elements in codebook */ 97 #ifdef __EMBEDDED__ /* make sure stored in flash */ 98 const float *cb; /* The elements */ 99 #else 100 float *cb; /* The elements */ 101 #endif 102 }; 103 104 extern const struct lsp_codebook lsp_cb[]; 105 extern const struct lsp_codebook lsp_cbd[]; 106 extern const struct lsp_codebook lsp_cbjvm[]; 107 extern const struct lsp_codebook ge_cb[]; 108 extern const struct lsp_codebook newamp1vq_cb[]; 109 extern const struct lsp_codebook newamp1_energy_cb[]; 110 extern const struct lsp_codebook newamp2vq_cb[]; 111 extern const struct lsp_codebook newamp2_energy_cb[]; 112 113 #ifdef _GNU_SOURCE 114 #define POW10F(x) exp10f((x)) 115 #else 116 #define POW10F(x) expf(2.302585092994046f*(x)) 117 #endif 118 119 #endif 120