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Handle network end markers and missing end of LDU frames.

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This commit is contained in:
Jonathan Naylor 2016-09-28 07:53:45 +01:00
parent b0aecf12eb
commit f627a18dd8
4 changed files with 76 additions and 46 deletions
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105
P25Control.cpp
View file

@ -62,6 +62,7 @@ m_netLSD(),
m_netLDU1(NULL),
m_netLDU2(NULL),
m_lastIMBE(NULL),
m_rfLDU(NULL),
m_fp(NULL)
{
assert(display != NULL);
@ -75,6 +76,9 @@ m_fp(NULL)
m_lastIMBE = new unsigned char[11U];
::memcpy(m_lastIMBE, P25_NULL_IMBE, 11U);
m_rfLDU = new unsigned char[P25_LDU_FRAME_LENGTH_BYTES];
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
}
CP25Control::~CP25Control()
@ -82,6 +86,7 @@ CP25Control::~CP25Control()
delete[] m_netLDU1;
delete[] m_netLDU2;
delete[] m_lastIMBE;
delete[] m_rfLDU;
}
bool CP25Control::writeModem(unsigned char* data, unsigned int len)
@ -99,7 +104,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
LogMessage("P25, transmission lost, %.1f seconds, BER: %.1f%%", float(m_rfFrames) / 5.56F, float(m_rfErrs * 100U) / float(m_rfBits));
if (m_netState == RS_NET_IDLE)
m_display->clearP25();
writeNetwork(data + 2U, P25_DUID_TERM);
writeNetwork(data + 2U, P25_DUID_TERM, true);
m_rfState = RS_RF_LISTENING;
m_rfTimeout.stop();
m_rfData.reset();
@ -143,6 +148,12 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
}
createRFHeader();
writeNetwork(data + 2U, P25_DUID_HEADER, false);
}
if (m_rfLDU[0U] != 0x00U) {
writeNetwork(m_rfLDU, m_lastDUID, false);
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
}
// Regenerate Sync
@ -173,10 +184,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
writeFile(data + 2U, len - 2U);
#endif
if (m_rfFrames == 1U)
writeNetwork(data + 2U, P25_DUID_HEADER);
writeNetwork(data + 2U, P25_DUID_LDU1);
::memcpy(m_rfLDU, data + 2U, P25_LDU_FRAME_LENGTH_BYTES);
if (m_duplex) {
data[0U] = TAG_DATA;
@ -197,6 +205,11 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
if (m_rfState == RS_RF_LISTENING)
return false;
if (m_rfLDU[0U] != 0x00U) {
writeNetwork(m_rfLDU, m_lastDUID, false);
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
}
// Regenerate Sync
CSync::addP25Sync(data + 2U);
@ -225,7 +238,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
writeFile(data + 2U, len - 2U);
#endif
writeNetwork(data + 2U, P25_DUID_LDU2);
::memcpy(m_rfLDU, data + 2U, P25_LDU_FRAME_LENGTH_BYTES);
if (m_duplex) {
data[0U] = TAG_DATA;
@ -236,6 +249,11 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
if (m_rfState == RS_RF_LISTENING)
return false;
if (m_rfLDU[0U] != 0x00U) {
writeNetwork(m_rfLDU, m_lastDUID, true);
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
}
::memset(data + 2U, 0x00U, P25_TERM_FRAME_LENGTH_BYTES);
// Regenerate Sync
@ -259,7 +277,7 @@ bool CP25Control::writeModem(unsigned char* data, unsigned int len)
closeFile();
#endif
writeNetwork(data + 2U, P25_DUID_TERM);
writeNetwork(data + 2U, P25_DUID_TERM, true);
if (m_duplex) {
data[0U] = TAG_EOT;
@ -303,57 +321,57 @@ void CP25Control::writeNetwork()
switch (data[0U]) {
case 0x62U:
::memcpy(m_netLDU1 + 0U, data, 22U);
return;
break;
case 0x63U:
::memcpy(m_netLDU1 + 25U, data, 14U);
return;
break;
case 0x64U:
::memcpy(m_netLDU1 + 50U, data, 17U);
return;
break;
case 0x65U:
::memcpy(m_netLDU1 + 75U, data, 17U);
return;
break;
case 0x66U:
::memcpy(m_netLDU1 + 100U, data, 17U);
return;
break;
case 0x67U:
::memcpy(m_netLDU1 + 125U, data, 17U);
return;
break;
case 0x68U:
::memcpy(m_netLDU1 + 150U, data, 17U);
return;
break;
case 0x69U:
::memcpy(m_netLDU1 + 175U, data, 17U);
return;
break;
case 0x6AU:
::memcpy(m_netLDU1 + 200U, data, 16U);
if (m_netState != RS_NET_IDLE)
createNetLDU1();
return;
break;
case 0x6BU:
::memcpy(m_netLDU2 + 0U, data, 22U);
return;
break;
case 0x6CU:
::memcpy(m_netLDU2 + 25U, data, 14U);
return;
break;
case 0x6DU:
::memcpy(m_netLDU2 + 50U, data, 17U);
return;
break;
case 0x6EU:
::memcpy(m_netLDU2 + 75U, data, 17U);
return;
break;
case 0x6FU:
::memcpy(m_netLDU2 + 100U, data, 17U);
return;
break;
case 0x70U:
::memcpy(m_netLDU2 + 125U, data, 17U);
return;
break;
case 0x71U:
::memcpy(m_netLDU2 + 150U, data, 17U);
return;
break;
case 0x72U:
::memcpy(m_netLDU2 + 175U, data, 17U);
return;
break;
case 0x73U:
::memcpy(m_netLDU2 + 200U, data, 16U);
if (m_netState != RS_NET_IDLE) {
@ -361,12 +379,9 @@ void CP25Control::writeNetwork()
createNetLDU1();
}
createNetLDU2();
return;
case 0x00U:
createNetTerminator(data);
return;
break;
default:
return;
break;
}
}
@ -430,7 +445,7 @@ void CP25Control::writeQueueNet(const unsigned char* data, unsigned int length)
m_queue.addData(data, len);
}
void CP25Control::writeNetwork(const unsigned char *data, unsigned char type)
void CP25Control::writeNetwork(const unsigned char *data, unsigned char type, bool end)
{
assert(data != NULL);
@ -446,10 +461,10 @@ void CP25Control::writeNetwork(const unsigned char *data, unsigned char type)
m_network->writeHeader(m_rfData);
break;
case P25_DUID_LDU1:
m_network->writeLDU1(data, m_rfData, m_rfLSD);
m_network->writeLDU1(data, m_rfData, m_rfLSD, end);
break;
case P25_DUID_LDU2:
m_network->writeLDU2(data, m_rfData, m_rfLSD);
m_network->writeLDU2(data, m_rfData, m_rfLSD, end);
break;
case P25_DUID_TERM:
case P25_DUID_TERM_LC:
@ -562,6 +577,7 @@ void CP25Control::createRFHeader()
m_rfBits = 1U;
m_rfTimeout.start();
m_lastDUID = P25_DUID_HEADER;
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
#if defined(DUMP_P25)
openFile();
@ -633,6 +649,11 @@ void CP25Control::createNetHeader()
void CP25Control::createNetLDU1()
{
// Check for an unflushed LDU2
void* p = ::memchr(m_netLDU2, 0x02U, 9U * 25U);
if (p != NULL)
createNetLDU2();
insertMissingAudio(m_netLDU1);
unsigned char buffer[P25_LDU_FRAME_LENGTH_BYTES + 2U];
@ -674,10 +695,19 @@ void CP25Control::createNetLDU1()
::memset(m_netLDU1, 0x00U, 9U * 25U);
m_netFrames += 9U;
// Check for an end of stream marker
if (m_netLDU1[200U] == 0x6AU && m_netLDU1[215U] == 0x00U)
createNetTerminator();
}
void CP25Control::createNetLDU2()
{
// Check for an unflushed LDU1
void* p = ::memchr(m_netLDU1, 0x02U, 9U * 25U);
if (p != NULL)
createNetLDU1();
insertMissingAudio(m_netLDU2);
unsigned char buffer[P25_LDU_FRAME_LENGTH_BYTES + 2U];
@ -719,15 +749,14 @@ void CP25Control::createNetLDU2()
::memset(m_netLDU2, 0x00U, 9U * 25U);
m_netFrames += 9U;
// Check for an end of stream marker
if (m_netLDU2[200U] == 0x73U && m_netLDU2[215U] == 0x00U)
createNetTerminator();
}
void CP25Control::createNetTerminator(const unsigned char* data)
void CP25Control::createNetTerminator()
{
assert(data != NULL);
if (data[3U] != 0x25U)
return;
unsigned char buffer[P25_TERM_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_TERM_FRAME_LENGTH_BYTES + 2U);

5
P25Control.h
View file

@ -71,11 +71,12 @@ private:
unsigned char* m_netLDU1;
unsigned char* m_netLDU2;
unsigned char* m_lastIMBE;
unsigned char* m_rfLDU;
FILE* m_fp;
void writeQueueRF(const unsigned char* data, unsigned int length);
void writeQueueNet(const unsigned char* data, unsigned int length);
void writeNetwork(const unsigned char *data, unsigned char type);
void writeNetwork(const unsigned char *data, unsigned char type, bool end);
void writeNetwork();
void addBusyBits(unsigned char* data, unsigned int length, bool b1, bool b2);
@ -87,7 +88,7 @@ private:
void createNetHeader();
void createNetLDU1();
void createNetLDU2();
void createNetTerminator(const unsigned char* data);
void createNetTerminator();
bool openFile();
bool writeFile(const unsigned char* data, unsigned char length);

8
P25Network.cpp
View file

@ -103,7 +103,7 @@ bool CP25Network::writeHeader(const CP25Data& control)
return true;
}
bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd)
bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
{
assert(ldu1 != NULL);
@ -231,7 +231,7 @@ bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control,
buffer[1U] = lsd.getLSD1();
buffer[2U] = lsd.getLSD2();
m_audio.decode(ldu1, buffer + 4U, 8U);
buffer[15U] = 0x02U;
buffer[15U] = end ? 0x00U : 0x02U;
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 16U);
@ -243,7 +243,7 @@ bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control,
return true;
}
bool CP25Network::writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd)
bool CP25Network::writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
{
assert(ldu2 != NULL);
@ -377,7 +377,7 @@ bool CP25Network::writeLDU2(const unsigned char* ldu2, const CP25Data& control,
buffer[1U] = lsd.getLSD1();
buffer[2U] = lsd.getLSD2();
m_audio.decode(ldu2, buffer + 4U, 8U);
buffer[15U] = 0x02U;
buffer[15U] = end ? 0x00U : 0x02U;
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 16U);

4
P25Network.h
View file

@ -39,9 +39,9 @@ public:
bool writeHeader(const CP25Data& control);
bool writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd);
bool writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd, bool end);
bool writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd);
bool writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd, bool end);
bool writeTerminator();