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Diffstat (limited to 'src/defines.h')
| -rw-r--r-- | src/defines.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/defines.h b/src/defines.h new file mode 100644 index 0000000..a2fd9ec --- /dev/null +++ b/src/defines.h @@ -0,0 +1,122 @@ +/*---------------------------------------------------------------------------*\ + + 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_S 0.01 /* internal proc frame length in secs */ +#define TW_S 0.005 /* trapezoidal synth window overlap */ +#define MAX_AMP 160 /* maximum number of harmonics */ +#ifndef PI +#define PI 3.141592654 /* mathematical constant */ +#endif +#ifndef M_PI +#define M_PI 3.14159265358979323846f +#endif +#define TWO_PI 6.283185307 /* mathematical constant */ +#define MAX_STR 2048 /* maximum string size */ + +#define FFT_ENC 512 /* size of FFT used for encoder */ +#define FFT_DEC 512 /* size of FFT used in decoder */ +#define V_THRESH 6.0 /* voicing threshold in dB */ +#define LPC_ORD 10 /* LPC order */ +#define LPC_ORD_LOW 6 /* LPC order for lower rates */ + +/* Pitch estimation defines */ + +#define M_PITCH_S 0.0400 /* pitch analysis window in s */ +#define P_MIN_S 0.0025 /* minimum pitch period in s */ +#define P_MAX_S 0.0200 /* maximum pitch period in s */ + +/*---------------------------------------------------------------------------*\ + + TYPEDEFS + +\*---------------------------------------------------------------------------*/ + +/* Structure to hold constants calculated at run time based on sample rate */ + +typedef struct { + int Fs; /* sample rate of this instance */ + int n_samp; /* number of samples per 10ms frame at Fs */ + int max_amp; /* maximum number of harmonics */ + int m_pitch; /* pitch estimation window size in samples */ + int p_min; /* minimum pitch period in samples */ + int p_max; /* maximum pitch period in samples */ + float Wo_min; + float Wo_max; + int nw; /* analysis window size in samples */ + int tw; /* trapezoidal synthesis window overlap */ +} C2CONST; + +/* 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 + 1]; /* amplitiude of each harmonic */ + float phi[MAX_AMP + 1]; /* 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 */ +#ifdef __EMBEDDED__ /* make sure stored in flash */ + const float *cb; /* The elements */ +#else + float *cb; /* The elements */ +#endif +}; + +extern const struct lsp_codebook lsp_cb[]; +extern const struct lsp_codebook lsp_cbd[]; +extern const struct lsp_codebook lsp_cbjmv[]; +extern const struct lsp_codebook ge_cb[]; +extern const struct lsp_codebook newamp1vq_cb[]; +extern const struct lsp_codebook newamp1_energy_cb[]; +extern const struct lsp_codebook newamp2vq_cb[]; +extern const struct lsp_codebook newamp2_energy_cb[]; + +#ifdef _GNU_SOURCE +#define POW10F(x) exp10f((x)) +#else +#define POW10F(x) expf(2.302585092994046f * (x)) +#endif + +#endif |