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MMDVM_CM/M172DMR/mbeenc.cc

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Add open source ambe encoder for much better audio quality from M17 -> DMR
2020-11-30 21:24:57 -05:00
/* -*- c++ -*- */
/*
* AMBE halfrate encoder - Copyright 2016 Max H. Parke KA1RBI
*
* This file is part of OP25 and part of GNU Radio
*
* This 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 3, or (at your option)
* any later version.
*
* This software 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 software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cmath>
#include <cstring>
#include "mbeenc.h"
#include "Golay24128.h"
#include "ambe3600x2250_const.h"
#include "ambe3600x2400_const.h"
#include "vocoder_tables.h"
static const short b0_lookup[] = {
0, 0, 0, 1, 1, 2, 2, 2,
3, 3, 4, 4, 4, 5, 5, 5,
6, 6, 7, 7, 7, 8, 8, 8,
9, 9, 9, 10, 10, 11, 11, 11,
12, 12, 12, 13, 13, 13, 14, 14,
14, 15, 15, 15, 16, 16, 16, 17,
17, 17, 17, 18, 18, 18, 19, 19,
19, 20, 20, 20, 21, 21, 21, 21,
22, 22, 22, 23, 23, 23, 24, 24,
24, 24, 25, 25, 25, 25, 26, 26,
26, 27, 27, 27, 27, 28, 28, 28,
29, 29, 29, 29, 30, 30, 30, 30,
31, 31, 31, 31, 31, 32, 32, 32,
32, 33, 33, 33, 33, 34, 34, 34,
34, 35, 35, 35, 35, 36, 36, 36,
36, 37, 37, 37, 37, 38, 38, 38,
38, 38, 39, 39, 39, 39, 40, 40,
40, 40, 40, 41, 41, 41, 41, 42,
42, 42, 42, 42, 43, 43, 43, 43,
43, 44, 44, 44, 44, 45, 45, 45,
45, 45, 46, 46, 46, 46, 46, 47,
47, 47, 47, 47, 48, 48, 48, 48,
48, 49, 49, 49, 49, 49, 49, 50,
50, 50, 50, 50, 51, 51, 51, 51,
51, 52, 52, 52, 52, 52, 52, 53,
53, 53, 53, 53, 54, 54, 54, 54,
54, 54, 55, 55, 55, 55, 55, 56,
56, 56, 56, 56, 56, 57, 57, 57,
57, 57, 57, 58, 58, 58, 58, 58,
58, 59, 59, 59, 59, 59, 59, 60,
60, 60, 60, 60, 60, 61, 61, 61,
61, 61, 61, 62, 62, 62, 62, 62,
62, 63, 63, 63, 63, 63, 63, 63,
64, 64, 64, 64, 64, 64, 65, 65,
65, 65, 65, 65, 65, 66, 66, 66,
66, 66, 66, 67, 67, 67, 67, 67,
67, 67, 68, 68, 68, 68, 68, 68,
68, 69, 69, 69, 69, 69, 69, 69,
70, 70, 70, 70, 70, 70, 70, 71,
71, 71, 71, 71, 71, 71, 72, 72,
72, 72, 72, 72, 72, 73, 73, 73,
73, 73, 73, 73, 73, 74, 74, 74,
74, 74, 74, 74, 75, 75, 75, 75,
75, 75, 75, 75, 76, 76, 76, 76,
76, 76, 76, 76, 77, 77, 77, 77,
77, 77, 77, 77, 77, 78, 78, 78,
78, 78, 78, 78, 78, 79, 79, 79,
79, 79, 79, 79, 79, 80, 80, 80,
80, 80, 80, 80, 80, 81, 81, 81,
81, 81, 81, 81, 81, 81, 82, 82,
82, 82, 82, 82, 82, 82, 83, 83,
83, 83, 83, 83, 83, 83, 83, 84,
84, 84, 84, 84, 84, 84, 84, 84,
85, 85, 85, 85, 85, 85, 85, 85,
85, 86, 86, 86, 86, 86, 86, 86,
86, 86, 87, 87, 87, 87, 87, 87,
87, 87, 87, 88, 88, 88, 88, 88,
88, 88, 88, 88, 89, 89, 89, 89,
89, 89, 89, 89, 89, 89, 90, 90,
90, 90, 90, 90, 90, 90, 90, 90,
91, 91, 91, 91, 91, 91, 91, 91,
91, 92, 92, 92, 92, 92, 92, 92,
92, 92, 92, 93, 93, 93, 93, 93,
93, 93, 93, 93, 93, 94, 94, 94,
94, 94, 94, 94, 94, 94, 94, 94,
95, 95, 95, 95, 95, 95, 95, 95,
95, 95, 96, 96, 96, 96, 96, 96,
96, 96, 96, 96, 96, 97, 97, 97,
97, 97, 97, 97, 97, 97, 97, 98,
98, 98, 98, 98, 98, 98, 98, 98,
98, 98, 99, 99, 99, 99, 99, 99,
99, 99, 99, 99, 99, 99, 100, 100,
100, 100, 100, 100, 100, 100, 100, 100,
100, 101, 101, 101, 101, 101, 101, 101,
101, 101, 101, 101, 102, 102, 102, 102,
102, 102, 102, 102, 102, 102, 102, 102,
103, 103, 103, 103, 103, 103, 103, 103,
103, 103, 103, 103, 104, 104, 104, 104,
104, 104, 104, 104, 104, 104, 104, 104,
105, 105, 105, 105, 105, 105, 105, 105,
105, 105, 105, 105, 106, 106, 106, 106,
106, 106, 106, 106, 106, 106, 106, 106,
107, 107, 107, 107, 107, 107, 107, 107,
107, 107, 107, 107, 107, 108, 108, 108,
108, 108, 108, 108, 108, 108, 108, 108,
108, 109, 109, 109, 109, 109, 109, 109,
109, 109, 109, 109, 109, 109, 110, 110,
110, 110, 110, 110, 110, 110, 110, 110,
110, 110, 110, 111, 111, 111, 111, 111,
111, 111, 111, 111, 111, 111, 111, 111,
112, 112, 112, 112, 112, 112, 112, 112,
112, 112, 112, 112, 112, 112, 113, 113,
113, 113, 113, 113, 113, 113, 113, 113,
113, 113, 113, 113, 114, 114, 114, 114,
114, 114, 114, 114, 114, 114, 114, 114,
114, 115, 115, 115, 115, 115, 115, 115,
115, 115, 115, 115, 115, 115, 115, 116,
116, 116, 116, 116, 116, 116, 116, 116,
116, 116, 116, 116, 116, 116, 117, 117,
117, 117, 117, 117, 117, 117, 117, 117,
117, 117, 117, 117, 118, 118, 118, 118,
118, 118, 118, 118, 118, 118, 118, 118,
118, 118, 118, 119, 119, 119, 119, 119,
119, 119, 119
};
static const int m_list[] = {0, 1, 2, 3, 4, 5, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 7, 8, 9, 10, 15, 16, 24, 25, 31, 32, 6};
static const int d_list[] = {7, 1, 11, 21, 31, 25, 35, 45, 55, 49, 59, 69, 6, 0, 10, 20, 30, 24, 34, 44, 54, 48, 58, 68, 5, 15, 9, 19, 29, 39, 33, 43, 53, 63, 57, 67, 4, 14, 8, 18, 28, 38, 32, 42, 52, 62, 56, 66, 3, 13, 23, 17, 27, 37, 47, 41, 51, 61, 71, 65, 2, 12, 22, 16, 26, 36, 46, 40, 50, 60, 70, 64};
static const int alt_d_list[] = {0, 12, 24, 36, 48, 60, 1, 13, 25, 37, 49, 61, 2, 14, 26, 38, 50, 62, 3, 15, 27, 39, 51, 63, 4, 16, 28, 40, 52, 64, 5, 17, 29, 41, 53, 65, 6, 18, 30, 42, 54, 66, 7, 19, 31, 43, 55, 67, 8, 20, 32, 44, 56, 68, 9, 21, 33, 45, 57, 69, 10, 22, 34, 46, 58, 70, 11, 23, 35, 47, 59, 71};
static const int b_lengths[] = {7,4,6,9,7,4,4,4,3};
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])
static inline uint32_t golay_24_encode(uint32_t code_word_in)
{
static const uint32_t encoding[12] = {
040006165,
020003073,
010007550,
04003664,
02001732,
01006631,
0403315,
0201547,
0106706,
045227,
024476,
014353
};
uint32_t code_word_out = 0;
for(uint16_t i = 0; i < 12; i++) {
uint32_t temp_word = code_word_in & (1 << (11 - i));
if(temp_word >= 1) {
code_word_out = code_word_out ^ encoding[i];
}
}
return(code_word_out);
}
/* APCO Golay(23,11,7) ecoder.
*
* \param val The 12-bit value to encode.
* \return The encoded codeword.
*/
static inline uint32_t golay_23_encode(uint32_t code_word_in)
{
return golay_24_encode(code_word_in) >> 1;
}
static void dump_i(uint8_t dest[], int src, int count) {
for (int i=0; i<count; i++) {
dest[i] = src & 1;
src = src >> 1;
}
}
static inline void store_reg(int reg, uint8_t val[], int len) {
for (int i=0; i<len; i++){
val[i] = (reg >> (len-1-i)) & 1;
}
}
static inline int load_reg(const uint8_t val[], int len) {
int acc = 0;
for (int i=0; i<len; i++){
acc = (acc << 1) + (val[i] & 1);
}
return acc;
}
#if 0
// fixme: should not be static
static mbe_parms cur_mp;
static mbe_parms prev_mp;
#endif
static inline float make_f0(int b0) {
return (powf(2, (-4.311767578125 - (2.1336e-2 * ((float)b0+0.5)))));
}
static void encode_ambe(const IMBE_PARAM *imbe_param, int b[], mbe_parms*cur_mp, mbe_parms*prev_mp, bool dstar, float gain_adjust) {
static const float SQRT_2 = sqrtf(2.0);
static const int b0_lmax = sizeof(b0_lookup) / sizeof(b0_lookup[0]);
// int b[9];
// ref_pitch is Q8_8 in range 19.875 - 123.125
int b0_i = (imbe_param->ref_pitch >> 5) - 159;
if (b0_i < 0 || b0_i > b0_lmax) {
fprintf(stderr, "encode error b0_i %d\n", b0_i);
return;
}
b[0] = b0_lookup[b0_i];
int L;
if (dstar)
L = (int) AmbePlusLtable[b[0]];
else
L = (int) AmbeLtable[b[0]];
#if 1
// adjust b0 until L agrees
while (L != imbe_param->num_harms) {
if (L < imbe_param->num_harms)
b0_i ++;
else if (L > imbe_param->num_harms)
b0_i --;
if (b0_i < 0 || b0_i > b0_lmax) {
fprintf(stderr, "encode error2 b0_i %d\n", b0_i);
return;
}
b[0] = b0_lookup[b0_i];
if (dstar)
L = (int) AmbePlusLtable[b[0]];
else
L = (int) AmbeLtable[b[0]];
}
#endif
float m_float2[NUM_HARMS_MAX];
for (int l=1; l <= L; l++) {
m_float2[l-1] = (float)imbe_param->sa[l-1] ;
m_float2[l-1] = m_float2[l-1] * m_float2[l-1];
}
float en_min = 0;
b[1] = 0;
int vuv_max = (dstar) ? 16 : 17;
for (int n=0; n < vuv_max; n++) {
float En = 0;
for (int l=1; l <= L; l++) {
int jl;
if (dstar)
jl = (int) ((float) l * (float) 16.0 * make_f0(b[0]));
else
jl = (int) ((float) l * (float) 16.0 * AmbeW0table[b[0]]);
int kl = 12;
if (l <= 36)
kl = (l + 2) / 3;
if (dstar) {
if (imbe_param->v_uv_dsn[(kl-1)*3] != AmbePlusVuv[n][jl])
En += m_float2[l-1];
} else {
if (imbe_param->v_uv_dsn[(kl-1)*3] != AmbeVuv[n][jl])
En += m_float2[l-1];
}
}
if (n == 0)
en_min = En;
else if (En < en_min) {
b[1] = n;
en_min = En;
}
}
// log spectral amplitudes
float num_harms_f = (float) imbe_param->num_harms;
float log_l_2 = 0.5 * log2f(num_harms_f); // fixme: table lookup
float log_l_w0;
if (dstar)
log_l_w0 = 0.5 * log2f(num_harms_f * make_f0(b[0]) * 2.0 * M_PI) + 2.289;
else
log_l_w0 = 0.5 * log2f(num_harms_f * AmbeW0table[b[0]] * 2.0 * M_PI) + 2.289;
float lsa[NUM_HARMS_MAX];
float lsa_sum=0.0;
for (int i1 = 0; i1 < imbe_param->num_harms; i1++) {
float sa = (float)imbe_param->sa[i1];
if (sa < 1) sa = 1.0;
if (imbe_param->v_uv_dsn[i1])
lsa[i1] = log_l_2 + log2f(sa);
else
lsa[i1] = log_l_w0 + log2f(sa);
lsa_sum += lsa[i1];
}
float gain = lsa_sum / num_harms_f;
float diff_gain;
if (dstar)
diff_gain = gain;
else
diff_gain = gain - 0.5 * prev_mp->gamma;
diff_gain -= gain_adjust;
float error;
int error_index;
int max_dg = (dstar) ? 64 : 32;
for (int i1 = 0; i1 < max_dg; i1++) {
float diff;
if (dstar)
diff = fabsf(diff_gain - AmbePlusDg[i1]);
else
diff = fabsf(diff_gain - AmbeDg[i1]);
//fprintf(stderr, "%2.4f:%2.4f ", diff, error);
if ((i1 == 0) || (diff < error)) {
error = diff;
error_index = i1;
}
}
//fprintf(stderr, "\n");
b[2] = error_index;
// prediction residuals
float l_prev_l = (float) (prev_mp->L) / num_harms_f;
float tmp_s = 0.0;
prev_mp->log2Ml[0] = prev_mp->log2Ml[1];
for (int i1 = 0; i1 < imbe_param->num_harms; i1++) {
float kl = l_prev_l * (float)(i1+1);
int kl_floor = (int) kl;
float kl_frac = kl - kl_floor;
tmp_s += (1.0 - kl_frac) * prev_mp->log2Ml[kl_floor +0] + kl_frac * prev_mp->log2Ml[kl_floor+1 +0];
}
float T[NUM_HARMS_MAX];
for (int i1 = 0; i1 < imbe_param->num_harms; i1++) {
float kl = l_prev_l * (float)(i1+1);
int kl_floor = (int) kl;
float kl_frac = kl - kl_floor;
T[i1] = lsa[i1] - 0.65 * (1.0 - kl_frac) * prev_mp->log2Ml[kl_floor +0] \
- 0.65 * kl_frac * prev_mp->log2Ml[kl_floor+1 +0];
}
// DCT
const int * J;
if (dstar)
J = AmbePlusLmprbl[imbe_param->num_harms];
else
J = AmbeLmprbl[imbe_param->num_harms];
float * c[4];
int acc = 0;
for (int i=0; i<4; i++) {
c[i] = &T[acc];
acc += J[i];
}
float C[4][17];
for (int i=1; i<=4; i++) {
for (int k=1; k<=J[i-1]; k++) {
float s = 0.0;
for (int j=1; j<=J[i-1]; j++) {
//fixme: lut?
s += (c[i-1][j-1] * cosf((M_PI * (((float)k) - 1.0) * (((float)j) - 0.5)) / (float)J[i-1]));
}
C[i-1][k-1] = s / (float)J[i-1];
}
}
float R[8];
R[0] = C[0][0] + SQRT_2 * C[0][1];
R[1] = C[0][0] - SQRT_2 * C[0][1];
R[2] = C[1][0] + SQRT_2 * C[1][1];
R[3] = C[1][0] - SQRT_2 * C[1][1];
R[4] = C[2][0] + SQRT_2 * C[2][1];
R[5] = C[2][0] - SQRT_2 * C[2][1];
R[6] = C[3][0] + SQRT_2 * C[3][1];
R[7] = C[3][0] - SQRT_2 * C[3][1];
// encode PRBA
float G[8];
for (int m=1; m<=8; m++) {
G[m-1] = 0.0;
for (int i=1; i<=8; i++) {
//fixme: lut?
G[m-1] += (R[i-1] * cosf((M_PI * (((float)m) - 1.0) * (((float)i) - 0.5)) / 8.0));
}
G[m-1] /= 8.0;
}
for (int i=0; i<512; i++) {
float err=0.0;
float diff;
if (dstar) {
diff = G[1] - AmbePlusPRBA24[i][0];
err += (diff * diff);
diff = G[2] - AmbePlusPRBA24[i][1];
err += (diff * diff);
diff = G[3] - AmbePlusPRBA24[i][2];
err += (diff * diff);
} else {
diff = G[1] - AmbePRBA24[i][0];
err += (diff * diff);
diff = G[2] - AmbePRBA24[i][1];
err += (diff * diff);
diff = G[3] - AmbePRBA24[i][2];
err += (diff * diff);
}
if (i == 0 || err < error) {
error = err;
error_index = i;
}
}
b[3] = error_index;
// PRBA58
for (int i=0; i<128; i++) {
float err=0.0;
float diff;
if (dstar) {
diff = G[4] - AmbePlusPRBA58[i][0];
err += (diff * diff);
diff = G[5] - AmbePlusPRBA58[i][1];
err += (diff * diff);
diff = G[6] - AmbePlusPRBA58[i][2];
err += (diff * diff);
diff = G[7] - AmbePlusPRBA58[i][3];
err += (diff * diff);
} else {
diff = G[4] - AmbePRBA58[i][0];
err += (diff * diff);
diff = G[5] - AmbePRBA58[i][1];
err += (diff * diff);
diff = G[6] - AmbePRBA58[i][2];
err += (diff * diff);
diff = G[7] - AmbePRBA58[i][3];
err += (diff * diff);
}
if (i == 0 || err < error) {
error = err;
error_index = i;
}
}
b[4] = error_index;
// higher order coeffs b5
int ii = 1;
if (J[ii-1] <= 2) {
b[4+ii] = 0.0;
} else {
int max_5 = (dstar) ? 16 : 32;
for (int n=0; n < max_5; n++) {
float err=0.0;
float diff;
for (int j=1; j <= J[ii-1]-2 && j <= 4; j++) {
if (dstar)
diff = AmbePlusHOCb5[n][j-1] - C[ii-1][j+2-1];
else
diff = AmbeHOCb5[n][j-1] - C[ii-1][j+2-1];
err += (diff * diff);
}
if (n == 0 || err < error) {
error = err;
error_index = n;
}
}
b[4+ii] = error_index;
}
// higher order coeffs b6
ii = 2;
if (J[ii-1] <= 2) {
b[4+ii] = 0.0;
} else {
for (int n=0; n < 16; n++) {
float err=0.0;
float diff;
for (int j=1; j <= J[ii-1]-2 && j <= 4; j++) {
if (dstar)
diff = AmbePlusHOCb6[n][j-1] - C[ii-1][j+2-1];
else
diff = AmbeHOCb6[n][j-1] - C[ii-1][j+2-1];
err += (diff * diff);
}
if (n == 0 || err < error) {
error = err;
error_index = n;
}
}
b[4+ii] = error_index;
}
// higher order coeffs b7
ii = 3;
if (J[ii-1] <= 2) {
b[4+ii] = 0.0;
} else {
for (int n=0; n < 16; n++) {
float err=0.0;
float diff;
for (int j=1; j <= J[ii-1]-2 && j <= 4; j++) {
if (dstar)
diff = AmbePlusHOCb7[n][j-1] - C[ii-1][j+2-1];
else
diff = AmbeHOCb7[n][j-1] - C[ii-1][j+2-1];
err += (diff * diff);
}
if (n == 0 || err < error) {
error = err;
error_index = n;
}
}
b[4+ii] = error_index;
}
// higher order coeffs b8
ii = 4;
if (J[ii-1] <= 2) {
b[4+ii] = 0.0;
} else {
int max_8 = (dstar) ? 16 : 8;
for (int n=0; n < max_8; n++) {
float err=0.0;
float diff;
for (int j=1; j <= J[ii-1]-2 && j <= 4; j++) {
if (dstar)
diff = AmbePlusHOCb8[n][j-1] - C[ii-1][j+2-1];
else
diff = AmbeHOCb8[n][j-1] - C[ii-1][j+2-1];
err += (diff * diff);
}
if (n == 0 || err < error) {
error = err;
error_index = n;
}
}
b[4+ii] = error_index;
}
//fprintf (stderr, "B\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d\n", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8]);
//int rc;
if (dstar)
mbe_dequantizeAmbe2400Parms (cur_mp, prev_mp, b);
else
mbe_dequantizeAmbe2250Parms (cur_mp, prev_mp, b);
mbe_moveMbeParms (cur_mp, prev_mp);
}
static void encode_49bit(uint8_t outp[49], const int b[9]) {
outp[0] = (b[0] >> 6) & 1;
outp[1] = (b[0] >> 5) & 1;
outp[2] = (b[0] >> 4) & 1;
outp[3] = (b[0] >> 3) & 1;
outp[4] = (b[1] >> 4) & 1;
outp[5] = (b[1] >> 3) & 1;
outp[6] = (b[1] >> 2) & 1;
outp[7] = (b[1] >> 1) & 1;
outp[8] = (b[2] >> 4) & 1;
outp[9] = (b[2] >> 3) & 1;
outp[10] = (b[2] >> 2) & 1;
outp[11] = (b[2] >> 1) & 1;
outp[12] = (b[3] >> 8) & 1;
outp[13] = (b[3] >> 7) & 1;
outp[14] = (b[3] >> 6) & 1;
outp[15] = (b[3] >> 5) & 1;
outp[16] = (b[3] >> 4) & 1;
outp[17] = (b[3] >> 3) & 1;
outp[18] = (b[3] >> 2) & 1;
outp[19] = (b[3] >> 1) & 1;
outp[20] = (b[4] >> 6) & 1;
outp[21] = (b[4] >> 5) & 1;
outp[22] = (b[4] >> 4) & 1;
outp[23] = (b[4] >> 3) & 1;
outp[24] = (b[5] >> 4) & 1;
outp[25] = (b[5] >> 3) & 1;
outp[26] = (b[5] >> 2) & 1;
outp[27] = (b[5] >> 1) & 1;
outp[28] = (b[6] >> 3) & 1;
outp[29] = (b[6] >> 2) & 1;
outp[30] = (b[6] >> 1) & 1;
outp[31] = (b[7] >> 3) & 1;
outp[32] = (b[7] >> 2) & 1;
outp[33] = (b[7] >> 1) & 1;
outp[34] = (b[8] >> 2) & 1;
outp[35] = b[1] & 1;
outp[36] = b[2] & 1;
outp[37] = (b[0] >> 2) & 1;
outp[38] = (b[0] >> 1) & 1;
outp[39] = b[0] & 1;
outp[40] = b[3] & 1;
outp[41] = (b[4] >> 2) & 1;
outp[42] = (b[4] >> 1) & 1;
outp[43] = b[4] & 1;
outp[44] = b[5] & 1;
outp[45] = b[6] & 1;
outp[46] = b[7] & 1;
outp[47] = (b[8] >> 1) & 1;
outp[48] = b[8] & 1;
}
MBEEncoder::MBEEncoder()
: d_49bit_mode(false),
d_dmr_mode(false),
d_88bit_mode(false),
d_dstar_mode(false),
d_gain_adjust(0),
d_alt_dstar_interleave(false)
{
mbe_parms enh_mp;
mbe_initMbeParms (&cur_mp, &prev_mp, &enh_mp);
}
MBEEncoder::~MBEEncoder()
{
}
void MBEEncoder::set_dstar_mode(void)
{
d_dstar_mode = true;
}
void MBEEncoder::set_49bit_mode(void)
{
d_49bit_mode = true;
}
void MBEEncoder::set_dmr_mode(void)
{
d_dmr_mode = true;
}
void MBEEncoder::set_88bit_mode(void)
{
d_88bit_mode = true;
}
// given a buffer of 160 audio samples (S16_LE),
// generate 72-bit ambe codeword (as 36 dibits in codeword[])
// (as 72 bits in codeword[] if in dstar mode)
// or 49-bit output codeword (if set_49bit_mode() has been called)
void MBEEncoder::encode(int16_t samples[], uint8_t codeword[])
{
int b[9];
unsigned char dmr[9];
int16_t frame_vector[8]; // result ignored
uint8_t ambe_bytes[9];
memset(ambe_bytes, 0, 9);
memset(dmr, 0, 9);
//memset (b, 0, 9);
/*
for(int i = 0; i < 160; ++i){
fprintf(stderr, "%04x ", (samples[i] & 0xffff));
}
fprintf(stderr, "\n");
*/
// TODO: should disable fullrate encoding/quantization/interleaving
// (unneeded in ambe encoder) to save CPU
// first do speech analysis to generate mbe model parameters
vocoder.imbe_encode(frame_vector, samples);
if(d_88bit_mode){
//vocoder.set_gain_adjust(1.0);
unsigned int offset = 0U;
int16_t mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[0U] & mask) != 0);
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[1U] & mask) != 0);
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[2U] & mask) != 0);
mask = 0x0800;
for (unsigned int i = 0U; i < 12U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[3U] & mask) != 0);
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[4U] & mask) != 0);
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[5U] & mask) != 0);
mask = 0x0400;
for (unsigned int i = 0U; i < 11U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[6U] & mask) != 0);
mask = 0x0040;
for (unsigned int i = 0U; i < 7U; i++, mask >>= 1, offset++)
WRITE_BIT8(codeword, offset, (frame_vector[7U] & mask) != 0);
return;
}
/*
fprintf(stderr, "IMBE: %04x %04x %04x %08x %04x %04x %04x %04x %04x\n", vocoder.param()->e_p, vocoder.param()->pitch, vocoder.param()->ref_pitch, vocoder.param()->fund_freq, vocoder.param()->num_harms, vocoder.param()->num_bands, vocoder.param()->l_uv, vocoder.param()->div_one_by_num_harm, vocoder.param()->div_one_by_num_harm_sh);
for(int i = 0; i < 56; ++i){
fprintf(stderr, "%04x ", vocoder.param()->v_uv_dsn[i]);
}
fprintf(stderr, "\n");
for(int i = 0; i < 59; ++i){
fprintf(stderr, "%04x ", vocoder.param()->b_vec[i]);
}
fprintf(stderr, "\n");
for(int i = 0; i < 59; ++i){
fprintf(stderr, "%04x ", vocoder.param()->bit_alloc[i]);
}
fprintf(stderr, "\n");
for(int i = 0; i < 56; ++i){
fprintf(stderr, "%04x ", vocoder.param()->sa[i]);
}
fprintf(stderr, "\n");
*/
// halfrate audio encoding - output rate is 2450 (49 bits)
encode_ambe(vocoder.param(), b, &cur_mp, &prev_mp, d_dstar_mode, d_gain_adjust);
if (d_dstar_mode) {
encode_dstar(codeword, b, d_alt_dstar_interleave);
} else if (d_49bit_mode) {
encode_49bit(codeword, b);
} else if(d_dmr_mode){
encode_49bit(codeword, b);
for(int i = 0; i < 9; ++i){
for(int j = 0; j < 8; ++j){
//ambe_bytes[i] |= (ambe_frame[((8-i)*8)+(7-j)] << (7-j));
ambe_bytes[i] |= (codeword[(i*8)+j] << (7-j));
}
}
encode_dmr(ambe_bytes, dmr);
memcpy(codeword, dmr, 9);
// add FEC and interleaving - output rate is 3600 (72 bits)
//encode_vcw(codeword, b);
}
for(int i = 0; i < 9; ++i){
for(int j = 0; j < 8; ++j){
//ambe_bytes[i] |= (ambe_frame[((8-i)*8)+(7-j)] << (7-j));
ambe_bytes[i] |= (codeword[(i*8)+j] << (7-j));
}
}
}
void MBEEncoder::encode_dstar(uint8_t result[72], const int b[9], bool alt_dstar_interleave) {
uint8_t pbuf[48];
uint8_t tbuf[48];
int tbufp = 0;
for (int i=0; i < 9; i++) {
store_reg(b[i], &tbuf[tbufp], b_lengths[i]);
tbufp += b_lengths[i];
}
for (int i=0; i < 48; i++)
pbuf[i] = tbuf[m_list[i]];
int u0 = load_reg(pbuf+0, 12);
int u1 = load_reg(pbuf+12, 12);
int m1 = PRNG_TABLE[u0];
int c0 = golay_24_encode(u0);
int c1 = golay_24_encode(u1) ^ m1;
uint8_t pre_buf[72];
store_reg(c0, pre_buf, 24);
store_reg(c1, pre_buf+24, 24);
memcpy(pre_buf+48, pbuf+24, 24);
for (int i=0; i < 72; i++)
if (alt_dstar_interleave)
result[i] = pre_buf[alt_d_list[i]];
else
result[d_list[i]] = pre_buf[i];
}
void MBEEncoder::encode_dmr(const unsigned char* in, unsigned char* out)
{
unsigned int aOrig = 0U;
unsigned int bOrig = 0U;
unsigned int cOrig = 0U;
unsigned int MASK = 0x000800U;
for (unsigned int i = 0U; i < 12U; i++, MASK >>= 1) {
unsigned int n1 = i;
unsigned int n2 = i + 12U;
if (READ_BIT(in, n1))
aOrig |= MASK;
if (READ_BIT(in, n2))
bOrig |= MASK;
}
MASK = 0x1000000U;
for (unsigned int i = 0U; i < 25U; i++, MASK >>= 1) {
unsigned int n = i + 24U;
if (READ_BIT(in, n))
cOrig |= MASK;
}
unsigned int a = CGolay24128::encode24128(aOrig);
// The PRNG
unsigned int p = PRNG_TABLE[aOrig] >> 1;
unsigned int b = CGolay24128::encode23127(bOrig) >> 1;
b ^= p;
MASK = 0x800000U;
for (unsigned int i = 0U; i < 24U; i++, MASK >>= 1) {
unsigned int aPos = DMR_A_TABLE[i];
WRITE_BIT(out, aPos, a & MASK);
}
MASK = 0x400000U;
for (unsigned int i = 0U; i < 23U; i++, MASK >>= 1) {
unsigned int bPos = DMR_B_TABLE[i];
WRITE_BIT(out, bPos, b & MASK);
}
MASK = 0x1000000U;
for (unsigned int i = 0U; i < 25U; i++, MASK >>= 1) {
unsigned int cPos = DMR_C_TABLE[i];
WRITE_BIT(out, cPos, cOrig & MASK);
}
}
void MBEEncoder::encode_vcw(uint8_t vf[], const int* b) {
uint32_t c0,c1,c2,c3;
int u0,u1,u2,u3;
u0 = \
((b[0] & 0x78) << 5 ) | \
((b[1] & 0x1e) << 3 ) | \
((b[2] & 0x1e) >> 1 );
u1 = \
((b[3] & 0x1fe) << 3 ) | \
((b[4] & 0x78) >> 3 );
u2 = \
((b[5] & 0x1e) << 6 ) | \
((b[6] & 0xe) << 3 ) | \
((b[7] & 0xe) ) | \
((b[8] & 0x4) >> 2 );
u3 = \
((b[1] & 0x1) << 13 ) | \
((b[2] & 0x1) << 12 ) | \
((b[0] & 0x7) << 9 ) | \
((b[3] & 0x1) << 8 ) | \
((b[4] & 0x7) << 5 ) | \
((b[5] & 0x1) << 4 ) | \
((b[6] & 0x1) << 3 ) | \
((b[7] & 0x1) << 2 ) | \
((b[8] & 0x3) );
int m1 = PRNG_TABLE[u0] >> 1;
c0 = golay_24_encode(u0);
c1 = golay_23_encode(u1) ^ m1;
c2 = u2;
c3 = u3;
interleave_vcw(vf, c0, c1, c2, c3);
}
void MBEEncoder::interleave_vcw(uint8_t _vf[], int _c0, int _c1, int _c2, int _c3){
uint8_t vf[72];
uint8_t c0[24];
uint8_t c1[23];
uint8_t c2[11];
uint8_t c3[14];
dump_i(c0, _c0, 24);
dump_i(c1, _c1, 23);
dump_i(c2, _c2, 11);
dump_i(c3, _c3, 14);
vf[0] = c0[23];
vf[1] = c0[5];
vf[2] = c1[10];
vf[3] = c2[3];
vf[4] = c0[22];
vf[5] = c0[4];
vf[6] = c1[9];
vf[7] = c2[2];
vf[8] = c0[21];
vf[9] = c0[3];
vf[10] = c1[8];
vf[11] = c2[1];
vf[12] = c0[20];
vf[13] = c0[2];
vf[14] = c1[7];
vf[15] = c2[0];
vf[16] = c0[19];
vf[17] = c0[1];
vf[18] = c1[6];
vf[19] = c3[13];
vf[20] = c0[18];
vf[21] = c0[0];
vf[22] = c1[5];
vf[23] = c3[12];
vf[24] = c0[17];
vf[25] = c1[22];
vf[26] = c1[4];
vf[27] = c3[11];
vf[28] = c0[16];
vf[29] = c1[21];
vf[30] = c1[3];
vf[31] = c3[10];
vf[32] = c0[15];
vf[33] = c1[20];
vf[34] = c1[2];
vf[35] = c3[9];
vf[36] = c0[14];
vf[37] = c1[19];
vf[38] = c1[1];
vf[39] = c3[8];
vf[40] = c0[13];
vf[41] = c1[18];
vf[42] = c1[0];
vf[43] = c3[7];
vf[44] = c0[12];
vf[45] = c1[17];
vf[46] = c2[10];
vf[47] = c3[6];
vf[48] = c0[11];
vf[49] = c1[16];
vf[50] = c2[9];
vf[51] = c3[5];
vf[52] = c0[10];
vf[53] = c1[15];
vf[54] = c2[8];
vf[55] = c3[4];
vf[56] = c0[9];
vf[57] = c1[14];
vf[58] = c2[7];
vf[59] = c3[3];
vf[60] = c0[8];
vf[61] = c1[13];
vf[62] = c2[6];
vf[63] = c3[2];
vf[64] = c0[7];
vf[65] = c1[12];
vf[66] = c2[5];
vf[67] = c3[1];
vf[68] = c0[6];
vf[69] = c1[11];
vf[70] = c2[4];
vf[71] = c3[0];
for (unsigned int i=0; i < sizeof(vf)/2; i++) {
_vf[i] = (vf[i*2] << 1) | vf[i*2+1];
}
}
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