diff --git a/MMDVMHost.vcxproj b/MMDVMHost.vcxproj
index 87f753f..4dbaa5d 100644
--- a/MMDVMHost.vcxproj
+++ b/MMDVMHost.vcxproj
@@ -194,6 +194,7 @@
+
@@ -234,6 +235,7 @@
+
diff --git a/MMDVMHost.vcxproj.filters b/MMDVMHost.vcxproj.filters
index fdd11f7..2ae5e9f 100644
--- a/MMDVMHost.vcxproj.filters
+++ b/MMDVMHost.vcxproj.filters
@@ -155,6 +155,9 @@
Header Files
+
+ Header Files
+
@@ -283,5 +286,8 @@
Source Files
+
+ Source Files
+
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 8596e72..545a998 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,8 @@ LDFLAGS = -g
OBJECTS = \
AMBEFEC.o BPTC19696.o Conf.o CRC.o Display.o DMRControl.o DMRCSBK.o DMRData.o DMRDataHeader.o DMREMB.o DMREmbeddedLC.o DMRFullLC.o DMRIPSC.o DMRLC.o DMRShortLC.o \
DMRSlot.o DMRSlotType.o DStarControl.o DStarHeader.o DStarNetwork.o DStarSlowData.o Golay2087.o Golay24128.o Hamming.o Log.o MMDVMHost.o Modem.o NullDisplay.o \
- QR1676.o RS129.o SerialController.o SHA256.o StopWatch.o Sync.o TFTSerial.o Timer.o UDPSocket.o Utils.o YSFControl.o YSFConvolution.o YSFFICH.o YSFParrot.o
+ QR1676.o RS129.o SerialController.o SHA256.o StopWatch.o Sync.o TFTSerial.o Timer.o UDPSocket.o Utils.o YSFControl.o YSFConvolution.o YSFFICH.o YSFParrot.o \
+ YSFPayload.o
all: MMDVMHost
diff --git a/YSFControl.cpp b/YSFControl.cpp
index 2ffce75..7fdd208 100644
--- a/YSFControl.cpp
+++ b/YSFControl.cpp
@@ -12,7 +12,7 @@
*/
#include "YSFControl.h"
-#include "YSFFICH.h"
+#include "YSFPayload.h"
#include "Utils.h"
#include "Sync.h"
#include "Log.h"
@@ -36,6 +36,7 @@ m_queue(1000U, "YSF Control"),
m_state(RS_RF_LISTENING),
m_timeoutTimer(1000U, timeout),
m_frames(0U),
+m_fich(),
m_parrot(NULL),
m_fp(NULL)
{
@@ -91,6 +92,17 @@ bool CYSFControl::writeModem(unsigned char *data)
CYSFFICH fich;
fich.decode(data + 2U);
+ unsigned char fi = fich.getFI();
+ unsigned char fn = fich.getFN();
+ unsigned char ft = fich.getFT();
+ unsigned char dt = fich.getDT();
+
+ LogMessage("YSF, EOT, FI=%X BN=%u BT=%u FN=%u FT=%u DT=%X", fich.getFI(), fich.getBN(), fich.getBT(), fich.getFN(), fich.getFT(), fich.getDT());
+
+ CYSFPayload payload;
+ payload.decode(data + 2U, fi, fn, ft, dt);
+ payload.encode(data + 2U);
+
m_frames++;
if (m_duplex) {
@@ -122,14 +134,46 @@ bool CYSFControl::writeModem(unsigned char *data)
} else {
CSync::addYSFSync(data + 2U);
- CYSFFICH fich;
- fich.decode(data + 2U);
+ if (valid) {
+ bool ret = m_fich.decode(data + 2U);
+ assert(ret);
+
+ LogMessage("YSF, Valid FICH, FI=%X BN=%u BT=%u FN=%u FT=%u DT=%X", m_fich.getFI(), m_fich.getBN(), m_fich.getBT(), m_fich.getFN(), m_fich.getFT(), m_fich.getDT());
+ } else {
+ LogMessage("YSF, invalid FICH");
+
+ // Reconstruct FICH based on the last valid frame
+ m_fich.setFI(0x01U); // Communication channel
+
+ unsigned char fn = m_fich.getFN();
+ unsigned char ft = m_fich.getFT();
+
+ fn++;
+ if (fn >= 8U) {
+ fn = 0U;
+ ft++;
+ if (ft >= 8U)
+ ft = 0U;
+ }
+
+ m_fich.setFN(fn);
+ m_fich.setFT(ft);
+ }
+
+ unsigned char fi = m_fich.getFI();
+ unsigned char fn = m_fich.getFN();
+ unsigned char ft = m_fich.getFT();
+ unsigned char dt = m_fich.getDT();
+
+ CYSFPayload payload;
+ payload.decode(data + 2U, fi, fn, ft, dt);
+ // payload.encode(data + 2U);
m_frames++;
if (m_duplex) {
- fich.setMR(YSF_MR_BUSY);
- fich.encode(data + 2U);
+ m_fich.setMR(YSF_MR_BUSY);
+ m_fich.encode(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
@@ -137,8 +181,8 @@ bool CYSFControl::writeModem(unsigned char *data)
}
if (m_parrot != NULL) {
- fich.setMR(YSF_MR_NOT_BUSY);
- fich.encode(data + 2U);
+ m_fich.setMR(YSF_MR_NOT_BUSY);
+ m_fich.encode(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
diff --git a/YSFControl.h b/YSFControl.h
index 0deb410..97e8a7a 100644
--- a/YSFControl.h
+++ b/YSFControl.h
@@ -24,6 +24,7 @@
#include "YSFParrot.h"
#include "Display.h"
#include "Defines.h"
+#include "YSFFICH.h"
#include "Timer.h"
#include "Modem.h"
@@ -47,6 +48,7 @@ private:
RPT_RF_STATE m_state;
CTimer m_timeoutTimer;
unsigned int m_frames;
+ CYSFFICH m_fich;
CYSFParrot* m_parrot;
FILE* m_fp;
diff --git a/YSFConvolution.cpp b/YSFConvolution.cpp
index 9d62ba8..fea12e1 100644
--- a/YSFConvolution.cpp
+++ b/YSFConvolution.cpp
@@ -40,7 +40,7 @@ m_dp(NULL)
{
m_metrics1 = new uint16_t[16U];
m_metrics2 = new uint16_t[16U];
- m_decisions = new uint64_t[360U];
+ m_decisions = new uint64_t[180U];
}
CYSFConvolution::~CYSFConvolution()
@@ -89,26 +89,27 @@ void CYSFConvolution::decode(uint8_t s0, uint8_t s1)
++m_dp;
+ assert((m_dp - m_decisions) <= 180U);
+
uint16_t* tmp = m_oldMetrics;
m_oldMetrics = m_newMetrics;
m_newMetrics = tmp;
}
-void CYSFConvolution::chainback(unsigned char* out)
+void CYSFConvolution::chainback(unsigned char* out, unsigned int nBits)
{
assert(out != NULL);
uint32_t state = 0U;
- uint8_t nbits = 96U;
- while (nbits-- > 0) {
+ while (nBits-- > 0) {
--m_dp;
uint32_t i = state >> (9 - K);
uint8_t bit = uint8_t(*m_dp >> i) & 1;
state = (bit << 7) | (state >> 1);
- WRITE_BIT1(out, nbits, bit != 0U);
+ WRITE_BIT1(out, nBits, bit != 0U);
}
}
diff --git a/YSFConvolution.h b/YSFConvolution.h
index 945257e..3fc4956 100644
--- a/YSFConvolution.h
+++ b/YSFConvolution.h
@@ -30,7 +30,7 @@ public:
void start();
void decode(uint8_t s0, uint8_t s1);
- void chainback(unsigned char* out);
+ void chainback(unsigned char* out, unsigned int nBits);
void encode(const unsigned char* in, unsigned char* out, unsigned int nBits) const;
diff --git a/YSFDefines.h b/YSFDefines.h
index ea45778..41414fd 100644
--- a/YSFDefines.h
+++ b/YSFDefines.h
@@ -24,6 +24,8 @@ const unsigned int YSF_FRAME_LENGTH_BYTES = 120U;
const unsigned char YSF_SYNC_BYTES[] = {0xD4U, 0x71U, 0xC9U, 0x63U, 0x4DU};
const unsigned int YSF_SYNC_LENGTH_BYTES = 5U;
+const unsigned int YSF_FICH_LENGTH_BYTES = 25U;
+
const unsigned char YSF_FI_MASK = 0xC0U;
const unsigned char YSF_DT_MASK = 0x30U;
diff --git a/YSFFICH.cpp b/YSFFICH.cpp
index 474ff25..17a03dd 100644
--- a/YSFFICH.cpp
+++ b/YSFFICH.cpp
@@ -87,7 +87,7 @@ bool CYSFFICH::decode(const unsigned char* bytes)
}
unsigned char output[13U];
- viterbi.chainback(output);
+ viterbi.chainback(output, 96U);
unsigned int b0 = CGolay24128::decode24128(output + 0U);
unsigned int b1 = CGolay24128::decode24128(output + 3U);
@@ -159,9 +159,29 @@ void CYSFFICH::encode(unsigned char* bytes)
}
}
+unsigned char CYSFFICH::getFI() const
+{
+ return (m_fich[0U] >> 6) & 0x03U;
+}
+
unsigned char CYSFFICH::getCM() const
{
- return m_fich[0U] & 0x0CU;
+ return (m_fich[0U] >> 2) & 0x03U;
+}
+
+unsigned char CYSFFICH::getBN() const
+{
+ return m_fich[0U] & 0x03U;
+}
+
+unsigned char CYSFFICH::getBT() const
+{
+ return (m_fich[1U] >> 6) & 0x03U;
+}
+
+unsigned char CYSFFICH::getFN() const
+{
+ return (m_fich[1U] >> 3) & 0x07U;
}
unsigned char CYSFFICH::getFT() const
@@ -169,9 +189,39 @@ unsigned char CYSFFICH::getFT() const
return m_fich[1U] & 0x07U;
}
-unsigned char CYSFFICH::getFN() const
+unsigned char CYSFFICH::getDT() const
{
- return (m_fich[1U] & 0x38U) >> 3;
+ return m_fich[2U] & 0x03U;
+}
+
+void CYSFFICH::setFI(unsigned char fi)
+{
+ m_fich[0U] &= 0x3FU;
+ m_fich[0U] |= (fi << 6) & 0xC0U;
+}
+
+void CYSFFICH::setBN(unsigned char bn)
+{
+ m_fich[0U] &= 0xFCU;
+ m_fich[0U] |= bn;
+}
+
+void CYSFFICH::setBT(unsigned char bt)
+{
+ m_fich[1U] &= 0x3FU;
+ m_fich[1U] |= (bt << 6) & 0xC0U;
+}
+
+void CYSFFICH::setFN(unsigned char fn)
+{
+ m_fich[1U] &= 0xE7U;
+ m_fich[1U] |= (fn << 3) & 0x1CU;
+}
+
+void CYSFFICH::setFT(unsigned char ft)
+{
+ m_fich[1U] &= 0xF8U;
+ m_fich[1U] |= ft;
}
void CYSFFICH::setMR(unsigned char mr)
diff --git a/YSFFICH.h b/YSFFICH.h
index 2471ef1..8804a9e 100644
--- a/YSFFICH.h
+++ b/YSFFICH.h
@@ -28,10 +28,19 @@ public:
void encode(unsigned char* bytes);
+ unsigned char getFI() const;
unsigned char getCM() const;
- unsigned char getFT() const;
+ unsigned char getBN() const;
+ unsigned char getBT() const;
unsigned char getFN() const;
+ unsigned char getFT() const;
+ unsigned char getDT() const;
+ void setFI(unsigned char fi);
+ void setBN(unsigned char bn);
+ void setBT(unsigned char bt);
+ void setFN(unsigned char fn);
+ void setFT(unsigned char ft);
void setMR(unsigned char mr);
void setVoIP(bool set);
diff --git a/YSFPayload.cpp b/YSFPayload.cpp
new file mode 100644
index 0000000..27120f9
--- /dev/null
+++ b/YSFPayload.cpp
@@ -0,0 +1,306 @@
+/*
+* Copyright (C) 2016 Jonathan Naylor, G4KLX
+*
+* 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; version 2 of the License.
+*
+* 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.
+*/
+
+#include "YSFConvolution.h"
+#include "YSFPayload.h"
+#include "YSFDefines.h"
+#include "Utils.h"
+#include "CRC.h"
+#include "Log.h"
+
+#include
+#include
+#include
+
+const unsigned int 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 unsigned int 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 unsigned char BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U};
+
+#define WRITE_BIT1(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_BIT1(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
+
+CYSFPayload::CYSFPayload() :
+m_data(NULL)
+{
+ m_data = new unsigned char[90U];
+}
+
+CYSFPayload::~CYSFPayload()
+{
+ delete[] m_data;
+}
+
+bool CYSFPayload::decode(const unsigned char* bytes, unsigned char fi, unsigned char fn, unsigned char ft, unsigned char dt)
+{
+ assert(bytes != NULL);
+
+ ::memcpy(m_data, bytes + YSF_SYNC_LENGTH_BYTES + YSF_FICH_LENGTH_BYTES, 90U);
+
+ // Header and trailer
+ if (fi == 0U || fi == 2U)
+ return decodeHeader();
+
+ // V/D Mode 1
+ if (dt == 0U)
+ return decodeVDMode1(fn, ft);
+
+ // V/D Mode 2
+ if (dt == 2U)
+ return decodeVDMode2(fn, ft);
+
+ // Data FR Mode
+ if (dt == 1U)
+ return decodeDataFRMode(fn, ft);
+
+ // Voice FR Mode
+ return true;
+}
+
+void CYSFPayload::encode(unsigned char* bytes)
+{
+ assert(bytes != NULL);
+
+ ::memcpy(bytes + YSF_SYNC_LENGTH_BYTES + YSF_FICH_LENGTH_BYTES, m_data, 90U);
+}
+
+bool CYSFPayload::decodeHeader()
+{
+ unsigned char dch1[45U];
+ unsigned char dch2[45U];
+
+ unsigned char* p1 = m_data;
+ unsigned char* p2 = dch1;
+ unsigned char* p3 = dch2;
+ for (unsigned int i = 0U; i < 5U; i++) {
+ ::memcpy(p2, p1, 9U);
+ p1 += 9U; p2 += 9U;
+ ::memcpy(p3, p1, 9U);
+ p1 += 9U; p3 += 9U;
+ }
+
+ CYSFConvolution conv;
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 180U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_9_20[i];
+ uint8_t s0 = READ_BIT1(dch1, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch1, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output1[23U];
+ conv.chainback(output1, 176U);
+
+ bool ret1 = CCRC::checkCCITT162(output1, 22U);
+ if (ret1)
+ CUtils::dump("Header/Trailer, valid DCH1", output1, 22U);
+
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 180U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_9_20[i];
+ uint8_t s0 = READ_BIT1(dch2, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch2, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output2[23U];
+ conv.chainback(output2, 176U);
+
+
+ bool ret2 = CCRC::checkCCITT162(output2, 22U);
+ if (ret2)
+ CUtils::dump("Header/Trailer, valid DCH2", output2, 22U);
+
+ return true;
+}
+
+bool CYSFPayload::decodeVDMode1(unsigned char fn, unsigned char ft)
+{
+ unsigned char dch[45U];
+
+ unsigned char* p1 = m_data;
+ unsigned char* p2 = dch;
+ for (unsigned int i = 0U; i < 5U; i++) {
+ ::memcpy(p2, p1, 9U);
+ p1 += 18U; p2 += 9U;
+ }
+
+ CYSFConvolution conv;
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 180U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_9_20[i];
+ uint8_t s0 = READ_BIT1(dch, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output[23U];
+ conv.chainback(output, 176U);
+
+ bool ret = CCRC::checkCCITT162(output, 22U);
+ if (ret)
+ CUtils::dump("V/D Mode 1, valid DCH", output, 22U);
+
+ return true;
+}
+
+bool CYSFPayload::decodeVDMode2(unsigned char fn, unsigned char ft)
+{
+ unsigned char dch[25U];
+
+ unsigned char* p1 = m_data;
+ unsigned char* p2 = dch;
+ for (unsigned int i = 0U; i < 5U; i++) {
+ ::memcpy(p2, p1, 5U);
+ p1 += 18U; p2 += 5U;
+ }
+
+ CYSFConvolution conv;
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 100U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_5_20[i];
+ uint8_t s0 = READ_BIT1(dch, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output[13U];
+ conv.chainback(output, 96U);
+
+ bool ret = CCRC::checkCCITT162(output, 12U);
+ if (ret)
+ CUtils::dump("V/D Mode 2, valid DCH", output, 12U);
+
+ return true;
+}
+
+bool CYSFPayload::decodeDataFRMode(unsigned char fn, unsigned char ft)
+{
+ unsigned char dch1[45U];
+ unsigned char dch2[45U];
+
+ unsigned char* p1 = m_data;
+ unsigned char* p2 = dch1;
+ unsigned char* p3 = dch2;
+ for (unsigned int i = 0U; i < 5U; i++) {
+ ::memcpy(p2, p1, 9U);
+ p1 += 9U; p2 += 9U;
+ ::memcpy(p3, p1, 9U);
+ p1 += 9U; p3 += 9U;
+ }
+
+ CYSFConvolution conv;
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 180U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_9_20[i];
+ uint8_t s0 = READ_BIT1(dch1, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch1, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output1[23U];
+ conv.chainback(output1, 176U);
+
+ bool ret1 = CCRC::checkCCITT162(output1, 22U);
+ if (ret1)
+ CUtils::dump("Data FR Mode, valid DCH1", output1, 22U);
+
+ conv.start();
+
+ // Deinterleave the FICH and send bits to the Viterbi decoder
+ for (unsigned int i = 0U; i < 180U; i++) {
+ unsigned int n = INTERLEAVE_TABLE_9_20[i];
+ uint8_t s0 = READ_BIT1(dch2, n) ? 1U : 0U;
+
+ n++;
+ uint8_t s1 = READ_BIT1(dch2, n) ? 1U : 0U;
+
+ conv.decode(s0, s1);
+ }
+
+ unsigned char output2[23U];
+ conv.chainback(output2, 176U);
+
+
+ bool ret2 = CCRC::checkCCITT162(output2, 22U);
+ if (ret2)
+ CUtils::dump("Data FR Mode, valid DCH2", output2, 22U);
+
+ return true;
+}
diff --git a/YSFPayload.h b/YSFPayload.h
new file mode 100644
index 0000000..282351c
--- /dev/null
+++ b/YSFPayload.h
@@ -0,0 +1,40 @@
+/*
+* Copyright (C) 2016 by Jonathan Naylor G4KLX
+*
+* 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.
+*/
+
+#if !defined(YSFPayload_H)
+#define YSFPayload_H
+
+class CYSFPayload {
+public:
+ CYSFPayload();
+ ~CYSFPayload();
+
+ bool decode(const unsigned char* bytes, unsigned char fi, unsigned char fn, unsigned char ft, unsigned char dt);
+
+ void encode(unsigned char* bytes);
+
+private:
+ unsigned char* m_data;
+
+ bool decodeHeader();
+ bool decodeVDMode1(unsigned char fn, unsigned char ft);
+ bool decodeVDMode2(unsigned char fn, unsigned char ft);
+ bool decodeDataFRMode(unsigned char fn, unsigned char ft);
+};
+
+#endif