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ysfcodec.cpp
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/*
Copyright (C) 2019-2021 Doug McLain
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 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 for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "ysfcodec.h"
#include "YSFConvolution.h"
#include "CRCenc.h"
#include "Golay24128.h"
#include "chamming.h"
#include "MMDVMDefines.h"
#include <iostream>
#include <cstring>
#define DEBUG
const uint32_t IMBE_INTERLEAVE[] = {
0, 7, 12, 19, 24, 31, 36, 43, 48, 55, 60, 67, 72, 79, 84, 91, 96, 103, 108, 115, 120, 127, 132, 139,
1, 6, 13, 18, 25, 30, 37, 42, 49, 54, 61, 66, 73, 78, 85, 90, 97, 102, 109, 114, 121, 126, 133, 138,
2, 9, 14, 21, 26, 33, 38, 45, 50, 57, 62, 69, 74, 81, 86, 93, 98, 105, 110, 117, 122, 129, 134, 141,
3, 8, 15, 20, 27, 32, 39, 44, 51, 56, 63, 68, 75, 80, 87, 92, 99, 104, 111, 116, 123, 128, 135, 140,
4, 11, 16, 23, 28, 35, 40, 47, 52, 59, 64, 71, 76, 83, 88, 95, 100, 107, 112, 119, 124, 131, 136, 143,
5, 10, 17, 22, 29, 34, 41, 46, 53, 58, 65, 70, 77, 82, 89, 94, 101, 106, 113, 118, 125, 130, 137, 142
};
const int dvsi_interleave[49] = {
0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 41, 43, 45, 47,
1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 42, 44, 46, 48,
2, 5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38
};
const uint32_t INTERLEAVE_TABLE_5_20[] = {
0U, 40U, 80U, 120U, 160U,
2U, 42U, 82U, 122U, 162U,
4U, 44U, 84U, 124U, 164U,
6U, 46U, 86U, 126U, 166U,
8U, 48U, 88U, 128U, 168U,
10U, 50U, 90U, 130U, 170U,
12U, 52U, 92U, 132U, 172U,
14U, 54U, 94U, 134U, 174U,
16U, 56U, 96U, 136U, 176U,
18U, 58U, 98U, 138U, 178U,
20U, 60U, 100U, 140U, 180U,
22U, 62U, 102U, 142U, 182U,
24U, 64U, 104U, 144U, 184U,
26U, 66U, 106U, 146U, 186U,
28U, 68U, 108U, 148U, 188U,
30U, 70U, 110U, 150U, 190U,
32U, 72U, 112U, 152U, 192U,
34U, 74U, 114U, 154U, 194U,
36U, 76U, 116U, 156U, 196U,
38U, 78U, 118U, 158U, 198U};
const uint32_t INTERLEAVE_TABLE_9_20[] = {
0U, 40U, 80U, 120U, 160U, 200U, 240U, 280U, 320U,
2U, 42U, 82U, 122U, 162U, 202U, 242U, 282U, 322U,
4U, 44U, 84U, 124U, 164U, 204U, 244U, 284U, 324U,
6U, 46U, 86U, 126U, 166U, 206U, 246U, 286U, 326U,
8U, 48U, 88U, 128U, 168U, 208U, 248U, 288U, 328U,
10U, 50U, 90U, 130U, 170U, 210U, 250U, 290U, 330U,
12U, 52U, 92U, 132U, 172U, 212U, 252U, 292U, 332U,
14U, 54U, 94U, 134U, 174U, 214U, 254U, 294U, 334U,
16U, 56U, 96U, 136U, 176U, 216U, 256U, 296U, 336U,
18U, 58U, 98U, 138U, 178U, 218U, 258U, 298U, 338U,
20U, 60U, 100U, 140U, 180U, 220U, 260U, 300U, 340U,
22U, 62U, 102U, 142U, 182U, 222U, 262U, 302U, 342U,
24U, 64U, 104U, 144U, 184U, 224U, 264U, 304U, 344U,
26U, 66U, 106U, 146U, 186U, 226U, 266U, 306U, 346U,
28U, 68U, 108U, 148U, 188U, 228U, 268U, 308U, 348U,
30U, 70U, 110U, 150U, 190U, 230U, 270U, 310U, 350U,
32U, 72U, 112U, 152U, 192U, 232U, 272U, 312U, 352U,
34U, 74U, 114U, 154U, 194U, 234U, 274U, 314U, 354U,
36U, 76U, 116U, 156U, 196U, 236U, 276U, 316U, 356U,
38U, 78U, 118U, 158U, 198U, 238U, 278U, 318U, 358U};
const uint32_t INTERLEAVE_TABLE_26_4[] = {
0U, 4U, 8U, 12U, 16U, 20U, 24U, 28U, 32U, 36U, 40U, 44U, 48U, 52U, 56U, 60U, 64U, 68U, 72U, 76U, 80U, 84U, 88U, 92U, 96U, 100U,
1U, 5U, 9U, 13U, 17U, 21U, 25U, 29U, 33U, 37U, 41U, 45U, 49U, 53U, 57U, 61U, 65U, 69U, 73U, 77U, 81U, 85U, 89U, 93U, 97U, 101U,
2U, 6U, 10U, 14U, 18U, 22U, 26U, 30U, 34U, 38U, 42U, 46U, 50U, 54U, 58U, 62U, 66U, 70U, 74U, 78U, 82U, 86U, 90U, 94U, 98U, 102U,
3U, 7U, 11U, 15U, 19U, 23U, 27U, 31U, 35U, 39U, 43U, 47U, 51U, 55U, 59U, 63U, 67U, 71U, 75U, 79U, 83U, 87U, 91U, 95U, 99U, 103U};
const uint32_t WHITENING_DATA[] = {0x93U, 0xD7U, 0x51U, 0x21U, 0x9CU, 0x2FU, 0x6CU, 0xD0U, 0xEFU, 0x0FU,
0xF8U, 0x3DU, 0xF1U, 0x73U, 0x20U, 0x94U, 0xEDU, 0x1EU, 0x7CU, 0xD8U};
const uint8_t BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U};
#define WRITE_BIT(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
#define READ_BIT(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
YSFCodec::YSFCodec(QString callsign, QString hostname, QString host, int port, bool ipv6, QString vocoder, QString modem, QString audioin, QString audioout) :
Codec(callsign, 0, hostname, host, port, ipv6, vocoder, modem, audioin, audioout),
m_fcs(false),
m_txfullrate(false)
{
}
YSFCodec::~YSFCodec()
{
}
void YSFCodec::process_udp()
{
QByteArray buf;
QByteArray out;
QHostAddress sender;
quint16 senderPort;
char ysftag[11];
buf.resize(m_udp->pendingDatagramSize());
int p = 5000;
m_udp->readDatagram(buf.data(), buf.size(), &sender, &senderPort);
#ifdef DEBUG
fprintf(stderr, "RECV: ");
for(int i = 0; i < buf.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)buf.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
if(((buf.size() == 14) && (m_hostname.left(3) != "FCS")) || ((buf.size() == 7) && (m_hostname.left(3) == "FCS"))){
if(m_modeinfo.status == CONNECTING){
m_modeinfo.status = CONNECTED_RW;
m_txtimer = new QTimer();
connect(m_txtimer, SIGNAL(timeout()), this, SLOT(transmit()));
m_ping_timer = new QTimer();
connect(m_ping_timer, SIGNAL(timeout()), this, SLOT(send_ping()));
set_fcs_mode(false);
//m_mbeenc->set_gain_adjust(2.5);
m_modeinfo.sw_vocoder_loaded = load_vocoder_plugin();
m_rxtimer = new QTimer();
connect(m_rxtimer, SIGNAL(timeout()), this, SLOT(process_rx_data()));
if(m_vocoder != ""){
m_hwrx = true;
m_hwtx = true;
m_modeinfo.hw_vocoder_loaded = true;
m_ambedev = new SerialAMBE("YSF");
m_ambedev->connect_to_serial(m_vocoder);
connect(m_ambedev, SIGNAL(connected(bool)), this, SLOT(ambe_connect_status(bool)));
connect(m_ambedev, SIGNAL(data_ready()), this, SLOT(get_ambe()));
}
else{
m_hwrx = false;
m_hwtx = false;
}
if(m_modemport != ""){
m_modem = new SerialModem("YSF");
m_modem->set_modem_flags(m_rxInvert, m_txInvert, m_pttInvert, m_useCOSAsLockout, m_duplex);
m_modem->set_modem_params(m_baud, m_rxfreq, m_txfreq, m_txDelay, m_rxLevel, m_rfLevel, m_ysfTXHang, m_cwIdTXLevel, m_dstarTXLevel, m_dmrTXLevel, m_ysfTXLevel, m_p25TXLevel, m_nxdnTXLevel, m_pocsagTXLevel, m_m17TXLevel);
m_modem->connect_to_serial(m_modemport);
connect(m_modem, SIGNAL(connected(bool)), this, SLOT(mmdvm_connect_status(bool)));
connect(m_modem, SIGNAL(modem_data_ready(QByteArray)), this, SLOT(process_modem_data(QByteArray)));
}
m_audio = new AudioEngine(m_audioin, m_audioout);
m_audio->init();
if(m_hostname.left(3) == "FCS"){
char info[100U];
::sprintf(info, "%9u%9u%-6.6s%-12.12s%7u", 438000000, 438000000, "AA00AA", "MMDVM", 1234567);
::memset(info + 43U, ' ', 57U);
out.append(info, 100);
m_udp->writeDatagram(out, m_address, m_modeinfo.port);
p = 800;
set_fcs_mode(true, m_hostname.left(8).toStdString());
}
m_ping_timer->start(p);
}
if((m_modeinfo.stream_state == STREAM_LOST) || (m_modeinfo.stream_state == STREAM_END) ){
m_modeinfo.stream_state = STREAM_IDLE;
}
m_modeinfo.count++;
}
if((buf.size() == 10) && (::memcmp(buf.data(), "ONLINE", 6U) == 0)){
m_modeinfo.count++;
if((m_modeinfo.stream_state == STREAM_LOST) || (m_modeinfo.stream_state == STREAM_END) ){
m_modeinfo.stream_state = STREAM_IDLE;
}
}
uint8_t *p_data = nullptr;
if((buf.size() == 155) && (::memcmp(buf.data(), "YSFD", 4U) == 0)){
memcpy(ysftag, buf.data() + 4, 10);ysftag[10] = '\0';
m_modeinfo.gw = QString(ysftag);
p_data = (uint8_t *)buf.data() + 35;
if(m_modem){
m_rxmodemq.append(MMDVM_FRAME_START);
m_rxmodemq.append(124);
m_rxmodemq.append(MMDVM_YSF_DATA);
m_rxmodemq.append('\x00');
for(int i = 0; i < 120; ++i){
m_rxmodemq.append(buf.data()[35+i]);
}
//m_rxmodemq.append(buf.mid(35));
}
}
else if(buf.size() == 130){
memcpy(ysftag, buf.data() + 0x79, 8);ysftag[8] = '\0';
m_modeinfo.gw = QString(ysftag);
p_data = (uint8_t *)buf.data();
if(m_modem){
m_rxmodemq.append(MMDVM_FRAME_START);
m_rxmodemq.append(124);
m_rxmodemq.append(MMDVM_YSF_DATA);
m_rxmodemq.append('\x00');
for(int i = 0; i < 120; ++i){
m_rxmodemq.append(buf.data()[i]);
}
//m_rxmodemq.append(buf.mid(35));
}
}
if(p_data != nullptr){
m_rxwatchdog = 0;
CYSFFICH fich;
if(fich.decode(p_data)){
m_fi = fich.getFI();
m_modeinfo.frame_number = fich.getFN();
m_modeinfo.frame_total = fich.getFT();
m_modeinfo.path = fich.getVoIP();
m_modeinfo.type = fich.getDT();
if(m_fi == YSF_FI_HEADER){
m_modeinfo.stream_state = STREAM_NEW;
m_modeinfo.ts = QDateTime::currentMSecsSinceEpoch();
if(!m_tx && !m_rxtimer->isActive() ){
m_audio->start_playback();
m_rxtimer->start(m_rxtimerint);
}
qDebug() << "New YSF stream from gw" << m_modeinfo.gw;
}
else if(m_fi == YSF_FI_TERMINATOR){
m_modeinfo.stream_state = STREAM_END;
m_modeinfo.ts = QDateTime::currentMSecsSinceEpoch();
qDebug() << "YSF stream ended" << m_modeinfo.gw;
}
else if(YSF_FI_COMMUNICATIONS){
if( (m_modeinfo.stream_state == STREAM_END) ||
(m_modeinfo.stream_state == STREAM_LOST) ||
(m_modeinfo.stream_state == STREAM_IDLE))
{
m_modeinfo.stream_state = STREAM_NEW;
m_modeinfo.ts = QDateTime::currentMSecsSinceEpoch();
if(!m_tx && !m_rxtimer->isActive() ){
m_audio->start_playback();
m_rxtimer->start(m_rxtimerint);
}
qDebug() << "New YSF stream in progress from gw" << m_modeinfo.gw;
}
else{
m_modeinfo.stream_state = STREAMING;
}
}
}
if(m_modeinfo.type == 3){
decode_vw(p_data);
}
else if(m_modeinfo.type != 1){
decode_dn(p_data);
}
}
emit update(m_modeinfo);
}
void YSFCodec::hostname_lookup(QHostInfo i)
{
if (!i.addresses().isEmpty()) {
QByteArray out;
if(m_hostname.left(3) == "FCS"){
out.append('P');
out.append('I');
out.append('N');
out.append('G');
out.append(m_modeinfo.callsign.toUtf8());
out.append(6 - m_modeinfo.callsign.size(), ' ');
out.append(m_hostname.toUtf8());
out.append(7, '\x00');
}
else{
out.append('Y');
out.append('S');
out.append('F');
out.append('P');
out.append(m_modeinfo.callsign.toUtf8());
out.append(10 - m_modeinfo.callsign.size(), ' ');
}
m_address = i.addresses().first();
m_udp = new QUdpSocket(this);
connect(m_udp, SIGNAL(readyRead()), this, SLOT(process_udp()));
m_udp->writeDatagram(out, m_address, m_modeinfo.port);
#ifdef DEBUG
fprintf(stderr, "CONN: ");
for(int i = 0; i < out.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)out.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
}
}
void YSFCodec::send_ping()
{
QByteArray out;
if(m_hostname.left(3) == "FCS"){
out.append('P');
out.append('I');
out.append('N');
out.append('G');
out.append(m_modeinfo.callsign.toUtf8());
out.append(6 - m_modeinfo.callsign.size(), ' ');
out.append(m_hostname.toUtf8());
out.append(7, '\x00');
}
else{
out.append('Y');
out.append('S');
out.append('F');
out.append('P');
out.append(m_modeinfo.callsign.toUtf8());
out.append(10 - m_modeinfo.callsign.size(), ' ');
}
m_udp->writeDatagram(out, m_address, m_modeinfo.port);
#ifdef DEBUG
fprintf(stderr, "PING: ");
for(int i = 0; i < out.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)out.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
}
void YSFCodec::send_disconnect()
{
QByteArray out;
if(m_hostname.left(3) == "FCS"){
out.append('C');
out.append('L');
out.append('O');
out.append('S');
out.append('E');
out.append(6, ' ');
}
else{
out.append('Y');
out.append('S');
out.append('F');
out.append('U');
out.append(m_modeinfo.callsign.toUtf8());
out.append(10 - m_modeinfo.callsign.size(), ' ');
}
m_udp->writeDatagram(out, m_address, m_modeinfo.port);
#ifdef DEBUG
fprintf(stderr, "SEND: ");
for(int i = 0; i < out.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)out.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
}
void YSFCodec::decode_vw(uint8_t* data)
{
uint8_t vch[18U];
uint8_t imbe[11U];
bool bit[144U];
data += YSF_SYNC_LENGTH_BYTES + YSF_FICH_LENGTH_BYTES;
uint32_t offset = 0U;
// We have a total of 5 VCH sections, iterate through each
for (uint32_t j = 0U; j < 5U; j++, offset += 18U) {
::memcpy(vch, data + offset, 18U);
for (uint32_t i = 0U; i < 144U; i++) {
uint32_t n = IMBE_INTERLEAVE[i];
bit[i] = READ_BIT(vch, n);
}
uint32_t c0data = 0U;
for (uint32_t i = 0U; i < 12U; i++)
c0data = (c0data << 1) | (bit[i] ? 0x01U : 0x00U);
bool prn[114U];
// Create the whitening vector and save it for future use
uint32_t p = 16U * c0data;
for (uint32_t i = 0U; i < 114U; i++) {
p = (173U * p + 13849U) % 65536U;
prn[i] = p >= 32768U;
}
// De-whiten some bits
for (uint32_t i = 0U; i < 114U; i++)
bit[i + 23U] ^= prn[i];
uint32_t offset = 0U;
for (uint32_t i = 0U; i < 12U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 0U]);
for (uint32_t i = 0U; i < 12U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 23U]);
for (uint32_t i = 0U; i < 12U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 46U]);
for (uint32_t i = 0U; i < 12U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 69U]);
for (uint32_t i = 0U; i < 11U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 92U]);
for (uint32_t i = 0U; i < 11U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 107U]);
for (uint32_t i = 0U; i < 11U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 122U]);
for (uint32_t i = 0U; i < 7U; i++, offset++)
WRITE_BIT(imbe, offset, bit[i + 137U]);
for(int i = 0; i < 11; ++i){
m_rximbecodecq.append(imbe[i]);
//m_rxcodecq.append(imbe[i]);
}
}
}
void YSFCodec::decode_vd1(uint8_t* data, uint8_t *dt)
{
uint8_t dch[45U];
const uint8_t* p1 = data;
uint8_t* p2 = dch;
for (uint32_t i = 0U; i < 5U; i++) {
::memcpy(p2, p1, 9U);
p1 += 18U; p2 += 9U;
}
CYSFConvolution conv;
conv.start();
for (uint32_t i = 0U; i < 180U; i++) {
uint32_t n = INTERLEAVE_TABLE_9_20[i];
uint8_t s0 = READ_BIT(dch, n) ? 1U : 0U;
n++;
uint8_t s1 = READ_BIT(dch, n) ? 1U : 0U;
conv.decode(s0, s1);
}
uint8_t output[23U];
conv.chainback(output, 176U);
bool ret = CCRC::checkCCITT162(output, 22U);
if (ret) {
for (uint32_t i = 0U; i < 20U; i++){
output[i] ^= WHITENING_DATA[i];
}
::memcpy(dt, output, 20U);
}
}
void YSFCodec::decode_vd2(uint8_t* data, uint8_t *dt)
{
uint8_t dch[25U];
const uint8_t* p1 = data;
uint8_t* p2 = dch;
for (uint32_t i = 0U; i < 5U; i++) {
::memcpy(p2, p1, 5U);
p1 += 18U; p2 += 5U;
}
CYSFConvolution conv;
conv.start();
for (uint32_t i = 0U; i < 100U; i++) {
uint32_t n = INTERLEAVE_TABLE_5_20[i];
uint8_t s0 = READ_BIT(dch, n) ? 1U : 0U;
n++;
uint8_t s1 = READ_BIT(dch, n) ? 1U : 0U;
conv.decode(s0, s1);
}
uint8_t output[13U];
conv.chainback(output, 96U);
bool ret = CCRC::checkCCITT162(output, 12U);
if (ret) {
for (uint32_t i = 0U; i < 10U; i++){
output[i] ^= WHITENING_DATA[i];
}
::memcpy(dt, output, YSF_CALLSIGN_LENGTH);
}
}
void YSFCodec::decode_dn(uint8_t* data)
{
uint8_t v_tmp[7U];
uint8_t dt[20];
::memset(v_tmp, 0, 7U);
data += YSF_SYNC_LENGTH_BYTES + YSF_FICH_LENGTH_BYTES;
switch(m_modeinfo.type){
case 0:
decode_vd1(data, dt);
break;
case 2:
decode_vd2(data, dt);
dt[10] = 0x00;
break;
}
switch (m_modeinfo.frame_number) {
case 0:
if(m_fi == YSF_FI_COMMUNICATIONS){
m_modeinfo.dst = QString((char *)dt);
}
break;
case 1:
m_modeinfo.src = QString((char *)dt);
break;
}
uint32_t offset = 40U; // DCH(0)
// We have a total of 5 VCH sections, iterate through each
for (uint32_t j = 0U; j < 5U; j++, offset += 144U) {
uint8_t vch[13U];
uint32_t dat_a = 0U;
uint32_t dat_b = 0U;
uint32_t dat_c = 0U;
// Deinterleave
for (uint32_t i = 0U; i < 104U; i++) {
uint32_t n = INTERLEAVE_TABLE_26_4[i];
bool s = READ_BIT(data, offset + n);
WRITE_BIT(vch, i, s);
}
// "Un-whiten" (descramble)
for (uint32_t i = 0U; i < 13U; i++)
vch[i] ^= WHITENING_DATA[i];
for (uint32_t i = 0U; i < 12U; i++) {
dat_a <<= 1U;
if (READ_BIT(vch, 3U*i + 1U))
dat_a |= 0x01U;;
}
for (uint32_t i = 0U; i < 12U; i++) {
dat_b <<= 1U;
if (READ_BIT(vch, 3U*(i + 12U) + 1U))
dat_b |= 0x01U;;
}
for (uint32_t i = 0U; i < 3U; i++) {
dat_c <<= 1U;
if (READ_BIT(vch, 3U*(i + 24U) + 1U))
dat_c |= 0x01U;;
}
for (uint32_t i = 0U; i < 22U; i++) {
dat_c <<= 1U;
if (READ_BIT(vch, i + 81U))
dat_c |= 0x01U;;
}
for (uint32_t i = 0U; i < 12U; i++) {
bool s1 = (dat_a << (i + 20U)) & 0x80000000;
bool s2 = (dat_b << (i + 20U)) & 0x80000000;
WRITE_BIT(v_tmp, i, s1);
WRITE_BIT(v_tmp, i + 12U, s2);
}
for (uint32_t i = 0U; i < 25U; i++) {
bool s = (dat_c << (i + 7U)) & 0x80000000;
WRITE_BIT(v_tmp, i + 24U, s);
}
if(m_hwrx){
interleave(v_tmp);
}
for(int i = 0; i < 7; ++i){
m_rxcodecq.append(v_tmp[i]);
}
}
}
void YSFCodec::interleave(uint8_t *ambe)
{
char ambe_data[49];
char dvsi_data[7];
memset(dvsi_data, 0, 7);
for(int i = 0; i < 6; ++i){
for(int j = 0; j < 8; j++){
ambe_data[j+(8*i)] = (1 & (ambe[i] >> (7 - j)));
}
}
ambe_data[48] = (1 & (ambe[6] >> 7));
for(int i = 0, j; i < 49; ++i){
j = dvsi_interleave[i];
dvsi_data[j/8] += (ambe_data[i])<<(7-(j%8));
}
memcpy(ambe, dvsi_data, 7);
}
void YSFCodec::process_modem_data(QByteArray d)
{
if(d.size() < 126){
return;
}
char callsign[YSF_CALLSIGN_LENGTH+1];
::memcpy(callsign, " ", YSF_CALLSIGN_LENGTH);
::memcpy(callsign, m_modeinfo.callsign.toStdString().c_str(), ::strlen(m_modeinfo.callsign.toStdString().c_str()));
d.remove(0, 4);
if(m_fcs){
d.insert(120, 10, 0);
d.insert(121, m_fcsname.c_str(), 8);
d.resize(130);
}
else{
d.insert(0U, "YSFD", 4U);
d.insert(4U, callsign, YSF_CALLSIGN_LENGTH);
d.insert(14U, callsign, YSF_CALLSIGN_LENGTH);
d.insert(24U, "ALL ", YSF_CALLSIGN_LENGTH);
d.insert(34U, (m_txcnt & 0x7f) << 1);
d.resize(155);
}
++m_txcnt;
m_udp->writeDatagram(d, m_address, m_modeinfo.port);
qDebug() << "Sending modem to network.....................................................";
#ifdef DEBUG
fprintf(stderr, "SEND:%d: ", d.size());
for(int i = 0; i < d.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)d.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
}
void YSFCodec::transmit()
{
uint8_t ambe_frame[88];
uint8_t ambe[7];
int16_t pcm[160];
uint8_t s = 7;
memset(ambe, 0, 7);
#ifdef USE_FLITE
if(m_ttsid > 0){
for(int i = 0; i < 160; ++i){
if(m_ttscnt >= tts_audio->num_samples/2){
pcm[i] = 0;
}
else{
pcm[i] = tts_audio->samples[m_ttscnt*2] / 2;
m_ttscnt++;
}
}
}
#endif
if(m_ttsid == 0){
if(m_audio->read(pcm, 160)){
}
else{
return;
}
}
if(m_hwtx && !m_txfullrate){
m_ambedev->encode(pcm);
}
else{
if(m_txfullrate){
s = 11;
vocoder.encode_4400(pcm, ambe_frame);
}
else{
s = 7;
if(m_modeinfo.sw_vocoder_loaded){
m_mbevocoder->encode_2450(pcm, ambe);
}
}
for(int i = 0; i < s; ++i){
if(!m_txfullrate){
m_txcodecq.append(ambe[i]);
}
else{
m_txcodecq.append(ambe_frame[i]);
}
}
}
if(m_tx && (m_txcodecq.size() >= (s*5))){
for(int i = 0; i < (s*5); ++i){
m_ambe[i] = m_txcodecq.dequeue();
}
send_frame();
}
else if(m_tx == false){
send_frame();
}
}
void YSFCodec::send_frame()
{
QByteArray txdata;
int frame_size;
if(m_tx){
m_modeinfo.stream_state = TRANSMITTING;
if(!m_txcnt){
encode_header();
}
else{
m_txfullrate ? encode_vw() : encode_dv2();
}
++m_txcnt;
frame_size = ::memcmp(m_ysfFrame, "YSFD", 4) ? 130 : 155;
txdata.append((char *)m_ysfFrame, frame_size);
m_udp->writeDatagram(txdata, m_address, m_modeinfo.port);
#ifdef DEBUG
fprintf(stderr, "SEND:%d: ", txdata.size());
for(int i = 0; i < txdata.size(); ++i){
fprintf(stderr, "%02x ", (uint8_t)txdata.data()[i]);
}
fprintf(stderr, "\n");
fflush(stderr);
#endif
}
else{
fprintf(stderr, "YSF TX stopped\n");
m_txtimer->stop();
if(m_ttsid == 0){
m_audio->stop_capture();
}
encode_header(1);
m_txcnt = 0;
m_ttscnt = 0;
frame_size = ::memcmp(m_ysfFrame, "YSFD", 4) ? 130 : 155;
txdata.append((char *)m_ysfFrame, frame_size);
m_udp->writeDatagram(txdata, m_address, m_modeinfo.port);
m_modeinfo.stream_state = STREAM_IDLE;
}
emit update_output_level(m_audio->level());
emit update(m_modeinfo);
}
void YSFCodec::encode_header(bool eot)
{
uint8_t callsign[12];
::memcpy(callsign, " ", 10);
::memcpy(callsign, m_modeinfo.callsign.toStdString().c_str(), ::strlen(m_modeinfo.callsign.toStdString().c_str()));
uint8_t *p_frame = m_ysfFrame;
if(m_fcs){
::memset(p_frame + 120U, 0, 10U);
::memcpy(p_frame + 121U, m_fcsname.c_str(), 8);
}
else{
::memcpy(p_frame + 0U, "YSFD", 4U);
::memcpy(p_frame + 4U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(p_frame + 14U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(p_frame + 24U, "ALL ", YSF_CALLSIGN_LENGTH);
if(eot){
p_frame[34U] = ((m_txcnt & 0x7f) << 1U) | 1U;
}
else{
p_frame[34U] = 0U;
}
p_frame = m_ysfFrame + 35U;
}
::memcpy(p_frame, YSF_SYNC_BYTES, 5);
m_fich.setFI(eot ? YSF_FI_TERMINATOR : YSF_FI_HEADER);
m_fich.setCS(2U);
m_fich.setCM(0U);
m_fich.setBN(0U);
m_fich.setBT(0U);
m_fich.setFN(0U);
m_fich.setFT(6U);
m_fich.setDev(0U);
m_fich.setMR(0U);
m_fich.setVoIP(false);
m_fich.setDT(m_txfullrate ? YSF_DT_VOICE_FR_MODE : YSF_DT_VD_MODE2);
m_fich.setSQL(false);
m_fich.setSQ(0U);
m_fich.encode(p_frame);
uint8_t csd1[20U], csd2[20U];
memset(csd1, '*', YSF_CALLSIGN_LENGTH);
//memset(csd1, '*', YSF_CALLSIGN_LENGTH/2);
//memcpy(csd1 + YSF_CALLSIGN_LENGTH/2, ysf_radioid, YSF_CALLSIGN_LENGTH/2);
memcpy(csd1 + YSF_CALLSIGN_LENGTH, callsign, YSF_CALLSIGN_LENGTH);
memcpy(csd2, callsign, YSF_CALLSIGN_LENGTH);
memcpy(csd2 + YSF_CALLSIGN_LENGTH, callsign, YSF_CALLSIGN_LENGTH);
//memset(csd2, ' ', YSF_CALLSIGN_LENGTH + YSF_CALLSIGN_LENGTH);
writeDataFRModeData1(csd1, p_frame);
writeDataFRModeData2(csd2, p_frame);
}
void YSFCodec::encode_vw()
{
uint8_t callsign[12];
::memcpy(callsign, " ", 10);
::memcpy(callsign, m_modeinfo.callsign.toStdString().c_str(), ::strlen(m_modeinfo.callsign.toStdString().c_str()));
uint8_t *p_frame = m_ysfFrame;
if(m_fcs){
::memset(p_frame + 120U, 0, 10U);
::memcpy(p_frame + 121U, m_fcsname.c_str(), 8);
}
else{
::memcpy(m_ysfFrame + 0U, "YSFD", 4U);
::memcpy(m_ysfFrame + 4U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(m_ysfFrame + 14U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(m_ysfFrame + 24U, "ALL ", YSF_CALLSIGN_LENGTH);
m_ysfFrame[34U] = (m_txcnt & 0x7f) << 1;
p_frame = m_ysfFrame + 35U;
}
::memcpy(p_frame, YSF_SYNC_BYTES, 5);
uint32_t fn = (m_txcnt - 1U) % 7U;
m_fich.setFI(YSF_FI_COMMUNICATIONS);
m_fich.setCS(2U);
m_fich.setCM(0U);
m_fich.setBN(0U);
m_fich.setBT(0U);
m_fich.setFN(fn);
m_fich.setFT(6U);
m_fich.setDev(0U);
m_fich.setMR(0U);
m_fich.setVoIP(false);
m_fich.setDT(YSF_DT_VOICE_FR_MODE);
m_fich.setSQL(false);
m_fich.setSQ(0U);
m_fich.encode(p_frame);
m_modeinfo.gw = m_modeinfo.callsign;
m_modeinfo.src = m_modeinfo.callsign;
m_modeinfo.dst = "ALL ";
m_modeinfo.type = YSF_DT_VOICE_FR_MODE;
m_modeinfo.path = false;
m_modeinfo.frame_number = fn;
m_modeinfo.frame_total = 6;
p_frame += YSF_SYNC_LENGTH_BYTES + YSF_FICH_LENGTH_BYTES;
for(int i = 0; i < 5; ++i){
//uint8_t imbe4400[11];
uint8_t imbe7200[18];
//for(int j = 0; j < 11; ++j){
// imbe4400[j] = m_txcodecq.dequeue();
//}
encode_imbe(imbe7200, m_ambe + (11*i));
memcpy(p_frame + (18*i), imbe7200, 18);
}
}
void YSFCodec::encode_imbe(uint8_t* data, const uint8_t* imbe)
{
bool bTemp[144U];
bool* bit = bTemp;
// c0
uint32_t c0 = 0U;
for (uint32_t i = 0U; i < 12U; i++) {
bool b = READ_BIT(imbe, i);
c0 = (c0 << 1) | (b ? 0x01U : 0x00U);
}
uint32_t g2 = CGolay24128::encode23127(c0);
for (int i = 23; i >= 0; i--) {
bit[i] = (g2 & 0x01U) == 0x01U;
g2 >>= 1;
}
bit += 23U;
// c1
uint32_t c1 = 0U;
for (uint32_t i = 12U; i < 24U; i++) {
bool b = READ_BIT(imbe, i);
c1 = (c1 << 1) | (b ? 0x01U : 0x00U);
}
g2 = CGolay24128::encode23127(c1);
for (int i = 23; i >= 0; i--) {
bit[i] = (g2 & 0x01U) == 0x01U;
g2 >>= 1;
}
bit += 23U;
// c2
uint32_t c2 = 0;
for (uint32_t i = 24U; i < 36U; i++) {
bool b = READ_BIT(imbe, i);
c2 = (c2 << 1) | (b ? 0x01U : 0x00U);
}
g2 = CGolay24128::encode23127(c2);
for (int i = 23; i >= 0; i--) {
bit[i] = (g2 & 0x01U) == 0x01U;
g2 >>= 1;
}
bit += 23U;
// c3
uint32_t c3 = 0U;
for (uint32_t i = 36U; i < 48U; i++) {
bool b = READ_BIT(imbe, i);
c3 = (c3 << 1) | (b ? 0x01U : 0x00U);
}
g2 = CGolay24128::encode23127(c3);
for (int i = 23; i >= 0; i--) {
bit[i] = (g2 & 0x01U) == 0x01U;
g2 >>= 1;
}
bit += 23U;
// c4
for (uint32_t i = 0U; i < 11U; i++)
bit[i] = READ_BIT(imbe, i + 48U);
CHamming::encode15113_1(bit);
bit += 15U;
// c5
for (uint32_t i = 0U; i < 11U; i++)
bit[i] = READ_BIT(imbe, i + 59U);
CHamming::encode15113_1(bit);
bit += 15U;
// c6
for (uint32_t i = 0U; i < 11U; i++)
bit[i] = READ_BIT(imbe, i + 70U);
CHamming::encode15113_1(bit);
bit += 15U;
// c7
for (uint32_t i = 0U; i < 7U; i++)
bit[i] = READ_BIT(imbe, i + 81U);
bool prn[114U];
// Create the whitening vector and save it for future use
uint32_t p = 16U * c0;
for (uint32_t i = 0U; i < 114U; i++) {
p = (173U * p + 13849U) % 65536U;
prn[i] = p >= 32768U;
}
// Whiten some bits
for (uint32_t i = 0U; i < 114U; i++)
bTemp[i + 23U] ^= prn[i];
// Interleave
for (uint32_t i = 0U; i < 144U; i++) {
uint32_t n = IMBE_INTERLEAVE[i];
WRITE_BIT(data, n, bTemp[i]);
}
}
void YSFCodec::encode_dv2()
{
uint8_t callsign[12];
::memcpy(callsign, " ", 10);
::memcpy(callsign, m_modeinfo.callsign.toStdString().c_str(), ::strlen(m_modeinfo.callsign.toStdString().c_str()));
uint8_t *p_frame = m_ysfFrame;
if(m_fcs){
::memset(p_frame + 120U, 0, 10U);
::memcpy(p_frame + 121U, m_fcsname.c_str(), 8);
}
else{
::memcpy(m_ysfFrame + 0U, "YSFD", 4U);
::memcpy(m_ysfFrame + 4U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(m_ysfFrame + 14U, callsign, YSF_CALLSIGN_LENGTH);
::memcpy(m_ysfFrame + 24U, "ALL ", YSF_CALLSIGN_LENGTH);
m_ysfFrame[34U] = (m_txcnt & 0x7f) << 1;
p_frame = m_ysfFrame + 35U;
}
::memcpy(p_frame, YSF_SYNC_BYTES, 5);
uint32_t fn = (m_txcnt - 1U) % 7U;