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113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
/*
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* Project 25 IMBE Encoder/Decoder Fixed-Point implementation
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* Developed by Pavel Yazev E-mail: pyazev@gmail.com
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* Version 1.0 (c) Copyright 2009
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* The software is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the 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; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Boston, MA
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* 02110-1301, USA.
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*/
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#include "typedef.h"
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#include "globals.h"
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#include "imbe.h"
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#include "ch_decode.h"
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#include "sa_decode.h"
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#include "sa_enh.h"
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#include "v_synt.h"
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#include "uv_synt.h"
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#include "basic_op.h"
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#include "aux_sub.h"
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#include "encode.h"
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#include "dsp_sub.h"
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#include "imbe_vocoder_impl.h"
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#include <cstring>
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const uint8_t BIT_MASK_TABLE8[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U };
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#define READ_BIT(p,i) (p[(i)>>3] & BIT_MASK_TABLE8[(i)&7])
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void imbe_vocoder_impl::decode_init(IMBE_PARAM *imbe_param)
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{
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v_synt_init();
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uv_synt_init();
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sa_decode_init();
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// Make previous frame for the first frame
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memset((char *)imbe_param, 0, sizeof(IMBE_PARAM));
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imbe_param->fund_freq = 0x0cf6474a;
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imbe_param->num_harms = 9;
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imbe_param->num_bands = 3;
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}
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void imbe_vocoder_impl::decode(IMBE_PARAM *imbe_param, Word16 *frame_vector, Word16 *snd)
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{
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Word16 snd_tmp[FRAME];
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Word16 j;
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decode_frame_vector(imbe_param, frame_vector);
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v_uv_decode(imbe_param);
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sa_decode(imbe_param);
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sa_enh(imbe_param);
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v_synt(imbe_param, snd);
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uv_synt(imbe_param, snd_tmp);
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for(j = 0; j < FRAME; j++)
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snd[j] = add(snd[j], snd_tmp[j]);
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}
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void imbe_vocoder_impl::decode_4400(int16_t *snd, 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_BIT(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_BIT(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_BIT(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_BIT(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_BIT(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_BIT(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_BIT(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_BIT(imbe, offset) != 0x00U ? mask : 0x0000;
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imbe_decode(frame, snd);
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}
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