mirror of https://github.com/ShaYmez/MMDVM_CM.git
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
/*---------------------------------------------------------------------------*\
|
|
|
|
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__
|
|
|
|
#include <complex>
|
|
#include <vector>
|
|
|
|
/*---------------------------------------------------------------------------*\
|
|
|
|
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
|
|
#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 */
|
|
#define MAXFACTORS 32 // e.g. an fft of length 128 has 4 factors
|
|
// as far as kissfft is concerned 4*4*4*2
|
|
|
|
/*---------------------------------------------------------------------------*\
|
|
|
|
TYPEDEFS
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
/* Structure to hold constants calculated at run time based on sample rate */
|
|
|
|
using C2CONST = struct c2const_tag
|
|
{
|
|
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 */
|
|
};
|
|
|
|
/* Structure to hold model parameters for one frame */
|
|
|
|
using MODEL = struct model_tag
|
|
{
|
|
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 */
|
|
};
|
|
|
|
/* describes each codebook */
|
|
|
|
struct lsp_codebook
|
|
{
|
|
int k; /* dimension of vector */
|
|
int log2m; /* number of bits in m */
|
|
int m; /* elements in codebook */
|
|
float *cb; /* The elements */
|
|
};
|
|
|
|
using FFT_STATE = struct fft_state_tag
|
|
{
|
|
int nfft;
|
|
bool inverse;
|
|
int factors[2*MAXFACTORS];
|
|
std::vector<std::complex<float>> twiddles;
|
|
};
|
|
|
|
using FFTR_STATE = struct fftr_state_tag
|
|
{
|
|
FFT_STATE substate;
|
|
std::vector<std::complex<float>> tmpbuf;
|
|
std::vector<std::complex<float>> super_twiddles;
|
|
};
|
|
|
|
extern const struct lsp_codebook lsp_cb[];
|
|
extern const struct lsp_codebook lsp_cbd[];
|
|
extern const struct lsp_codebook ge_cb[];
|
|
|
|
#endif
|