MMDVM_CM/P252DMR/MBEVocoder.cpp
2020-06-15 21:35:53 +01:00

125 lines
4.0 KiB
C++

/*
* Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
* Copyright (C) 2018 by Andy Uribe CA6JAU
* Copyright (C) 2020 by Doug McLain AD8DP
*
* 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; either version 2 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cstring>
#include <md380_vocoder.h>
#include "MBEVocoder.h"
const uint8_t BIT_MASK_TABLE8[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U };
#define WRITE_BIT8(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE8[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE8[(i)&7])
#define READ_BIT8(p,i) (p[(i)>>3] & BIT_MASK_TABLE8[(i)&7])
MBEVocoder::MBEVocoder(void)
{
}
void MBEVocoder::decode_4400(int16_t *pcm, uint8_t *imbe)
{
int16_t frame[8U] = {0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000};
unsigned int offset = 0U;
int16_t mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
frame[0U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
frame[1U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
frame[2U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
frame[3U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
frame[4U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
frame[5U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
frame[6U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
mask = 0x0040;
for (unsigned int i = 0U; i < 7U; i++, mask >>= 1, offset++)
frame[7U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
vocoder.imbe_decode(frame, pcm);
}
void MBEVocoder::encode_4400(int16_t *pcm, uint8_t *imbe)
{
int16_t frame_vector[8];
memset(imbe, 0, 9);
vocoder.imbe_encode(frame_vector, pcm);
//vocoder.set_gain_adjust(1.0);
uint32_t offset = 0U;
int16_t mask = 0x0800;
for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[0U] & mask) != 0);
mask = 0x0800;
for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[1U] & mask) != 0);
mask = 0x0800;
for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[2U] & mask) != 0);
mask = 0x0800;
for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[3U] & mask) != 0);
mask = 0x0400;
for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[4U] & mask) != 0);
mask = 0x0400;
for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[5U] & mask) != 0);
mask = 0x0400;
for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[6U] & mask) != 0);
mask = 0x0040;
for (uint32_t i = 0U; i < 7U; i++, mask >>= 1, offset++)
WRITE_BIT8(imbe, offset, (frame_vector[7U] & mask) != 0);
}
void MBEVocoder::decode_2450(int16_t *pcm, uint8_t *ambe49)
{
md380_decode(ambe49, pcm);
}
void MBEVocoder::encode_2450(int16_t *pcm, uint8_t *ambe49)
{
md380_encode(ambe49, pcm);
}