mirror of
https://github.com/f4exb/sdrangel.git
synced 2025-11-03 13:11:20 -05:00
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2019 F4EXB //
|
|
// written by Edouard Griffiths //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef SDRBASE_AUDIO_AUDIOG722_H_
|
|
#define SDRBASE_AUDIO_AUDIOG722_H_
|
|
|
|
#include <stdint.h>
|
|
#include "export.h"
|
|
|
|
class SDRBASE_API AudioG722
|
|
{
|
|
public:
|
|
AudioG722();
|
|
~AudioG722();
|
|
void init(int rate, int options);
|
|
int encode(uint8_t g722_data[], const int16_t amp[], int len);
|
|
|
|
private:
|
|
struct g722_encode_state
|
|
{
|
|
/*! TRUE if the operating in the special ITU test mode, with the band split filters
|
|
disabled. */
|
|
int itu_test_mode;
|
|
/*! TRUE if the G.722 data is packed */
|
|
int packed;
|
|
/*! TRUE if encode from 8k samples/second */
|
|
int eight_k;
|
|
/*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */
|
|
int bits_per_sample;
|
|
|
|
/*! Signal history for the QMF */
|
|
int x[24];
|
|
|
|
struct
|
|
{
|
|
int s;
|
|
int sp;
|
|
int sz;
|
|
int r[3];
|
|
int a[3];
|
|
int ap[3];
|
|
int p[3];
|
|
int d[7];
|
|
int b[7];
|
|
int bp[7];
|
|
int sg[7];
|
|
int nb;
|
|
int det;
|
|
} band[2];
|
|
|
|
unsigned int in_buffer;
|
|
int in_bits;
|
|
unsigned int out_buffer;
|
|
int out_bits;
|
|
|
|
g722_encode_state();
|
|
void init(int rate, int options);
|
|
};
|
|
|
|
int16_t saturate(int32_t amp)
|
|
{
|
|
int16_t amp16;
|
|
|
|
/* Hopefully this is optimized for the common case - not clipping */
|
|
amp16 = (int16_t) amp;
|
|
if (amp == amp16) {
|
|
return amp16;
|
|
}
|
|
|
|
if (amp > INT16_MAX) {
|
|
return INT16_MAX;
|
|
}
|
|
|
|
return INT16_MIN;
|
|
}
|
|
|
|
void block4(int band, int d);
|
|
|
|
g722_encode_state state;
|
|
|
|
static const int q6[32];
|
|
static const int iln[32];
|
|
static const int ilp[32];
|
|
static const int wl[8];
|
|
static const int rl42[16];
|
|
static const int ilb[32];
|
|
static const int qm4[16];
|
|
static const int qm2[4];
|
|
static const int qmf_coeffs[12];
|
|
static const int ihn[3];
|
|
static const int ihp[3];
|
|
static const int wh[3];
|
|
static const int rh2[4];
|
|
};
|
|
|
|
|
|
#endif /* SDRBASE_AUDIO_AUDIOG722_H_ */
|