mirror of https://github.com/ShaYmez/MMDVM_CM.git
126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
/*
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* Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
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* Copyright (C) 2018 by Andy Uribe CA6JAU
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* Copyright (C) 2020 by Doug McLain AD8DP
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cstring>
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#include <md380_vocoder.h>
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#include "MBEVocoder.h"
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const uint8_t BIT_MASK_TABLE8[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U };
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#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])
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#define READ_BIT8(p,i) (p[(i)>>3] & BIT_MASK_TABLE8[(i)&7])
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MBEVocoder::MBEVocoder(void)
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{
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md380_init();
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}
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void MBEVocoder::decode_4400(int16_t *pcm, uint8_t *imbe)
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{
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int16_t frame[8U] = {0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000};
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unsigned int offset = 0U;
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int16_t mask = 0x0800;
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for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
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frame[0U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0800;
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for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
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frame[1U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0800;
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for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
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frame[2U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0800;
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for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
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frame[3U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0400;
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for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
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frame[4U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0400;
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for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
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frame[5U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0400;
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for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
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frame[6U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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mask = 0x0040;
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for (unsigned int i = 0U; i < 7U; i++, mask >>= 1, offset++)
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frame[7U] |= READ_BIT8(imbe, offset) != 0x00U ? mask : 0x0000;
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vocoder.imbe_decode(frame, pcm);
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}
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void MBEVocoder::encode_4400(int16_t *pcm, uint8_t *imbe)
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{
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int16_t frame_vector[8];
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memset(imbe, 0, 9);
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vocoder.imbe_encode(frame_vector, pcm);
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//vocoder.set_gain_adjust(1.0);
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uint32_t offset = 0U;
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int16_t mask = 0x0800;
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for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[0U] & mask) != 0);
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mask = 0x0800;
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for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[1U] & mask) != 0);
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mask = 0x0800;
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for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[2U] & mask) != 0);
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mask = 0x0800;
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for (uint32_t i = 0U; i < 12U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[3U] & mask) != 0);
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mask = 0x0400;
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for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[4U] & mask) != 0);
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mask = 0x0400;
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for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[5U] & mask) != 0);
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mask = 0x0400;
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for (uint32_t i = 0U; i < 11U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[6U] & mask) != 0);
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mask = 0x0040;
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for (uint32_t i = 0U; i < 7U; i++, mask >>= 1, offset++)
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WRITE_BIT8(imbe, offset, (frame_vector[7U] & mask) != 0);
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}
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void MBEVocoder::decode_2450(int16_t *pcm, uint8_t *ambe49)
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{
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md380_decode(ambe49, pcm);
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}
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void MBEVocoder::encode_2450(int16_t *pcm, uint8_t *ambe49)
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{
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md380_encode(ambe49, pcm);
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}
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