mirror of
https://github.com/g4klx/MMDVMHost
synced 2025-12-23 08:45:48 +08:00
Simplify the FM protocol to match the FM Gateway.
This commit is contained in:
Jonathan Naylor
500
FMNetwork.cpp
500
FMNetwork.cpp
@@ -30,56 +30,27 @@
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#include <sys/stat.h>
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#include <fcntl.h>
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const unsigned int MMDVM_SAMPLERATE = 8000U;
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const unsigned int BUFFER_LENGTH = 1500U;
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CFMNetwork::CFMNetwork(const std::string& callsign, const std::string& protocol, const std::string& localAddress, unsigned short localPort, const std::string& gatewayAddress, unsigned short gatewayPort, unsigned int sampleRate, const std::string& squelchFile, bool debug) :
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m_callsign(callsign),
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m_protocol(FMNP_USRP),
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CFMNetwork::CFMNetwork(const std::string& localAddress, unsigned short localPort, const std::string& gatewayAddress, unsigned short gatewayPort, bool debug) :
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m_socket(localAddress, localPort),
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m_addr(),
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m_addrLen(0U),
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m_sampleRate(sampleRate),
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m_squelchFile(squelchFile),
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m_debug(debug),
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m_enabled(false),
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m_buffer(2000U, "FM Network"),
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m_seqNo(0U),
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#if defined(HAS_SRC)
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m_resampler(NULL),
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#endif
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m_error(0),
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m_fp(NULL)
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m_timer(1000U, 5U)
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{
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assert(!callsign.empty());
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assert(gatewayPort > 0U);
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assert(!gatewayAddress.empty());
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assert(sampleRate > 0U);
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if (CUDPSocket::lookup(gatewayAddress, gatewayPort, m_addr, m_addrLen) != 0)
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m_addrLen = 0U;
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// Remove any trailing letters in the callsign
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size_t pos = callsign.find_first_of(' ');
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if (pos != std::string::npos)
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m_callsign = callsign.substr(0U, pos);
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if (protocol == "RAW")
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m_protocol = FMNP_RAW;
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else
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m_protocol = FMNP_USRP;
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#if defined(HAS_SRC)
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m_resampler = ::src_new(SRC_SINC_FASTEST, 1, &m_error);
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#endif
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}
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CFMNetwork::~CFMNetwork()
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{
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#if defined(HAS_SRC)
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::src_delete(m_resampler);
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#endif
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}
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bool CFMNetwork::open()
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@@ -91,26 +62,13 @@ bool CFMNetwork::open()
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LogMessage("Opening FM network connection");
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if (m_protocol == FMNP_RAW) {
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if (!m_squelchFile.empty()) {
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m_fp = ::fopen(m_squelchFile.c_str(), "wb");
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if (m_fp == NULL) {
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#if !defined(_WIN32) && !defined(_WIN64)
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LogError("Cannot open the squelch file: %s, errno=%d", m_squelchFile.c_str(), errno);
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#else
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LogError("Cannot open the squelch file: %s, errno=%lu", m_squelchFile.c_str(), ::GetLastError());
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#endif
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return false;
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}
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}
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}
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if ((m_protocol == FMNP_RAW) && (m_sampleRate != MMDVM_SAMPLERATE)) {
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LogError("The resampler needed for non-native sample rates has not been included");
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bool ret = m_socket.open(m_addr);
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if (!ret)
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return false;
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}
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return m_socket.open(m_addr);
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m_timer.start();
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return true;
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}
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bool CFMNetwork::writeData(const float* data, unsigned int nSamples)
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@@ -118,72 +76,23 @@ bool CFMNetwork::writeData(const float* data, unsigned int nSamples)
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assert(data != NULL);
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assert(nSamples > 0U);
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if (m_protocol == FMNP_USRP)
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return writeUSRPData(data, nSamples);
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else if (m_protocol == FMNP_RAW)
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return writeRawData(data, nSamples);
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else
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return false;
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}
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bool CFMNetwork::writeUSRPData(const float* data, unsigned int nSamples)
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{
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assert(data != NULL);
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assert(nSamples > 0U);
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if (m_seqNo == 0U) {
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bool ret = writeUSRPStart();
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bool ret = writeStart();
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if (!ret)
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return false;
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}
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unsigned char buffer[500U];
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::memset(buffer, 0x00U, 500U);
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assert(data != nullptr);
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assert(nSamples > 0U);
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uint8_t buffer[BUFFER_LENGTH];
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::memset(buffer, 0x00U, BUFFER_LENGTH);
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unsigned int length = 0U;
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buffer[length++] = 'U';
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buffer[length++] = 'S';
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buffer[length++] = 'R';
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buffer[length++] = 'P';
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// Sequence number
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buffer[length++] = (m_seqNo >> 24) & 0xFFU;
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buffer[length++] = (m_seqNo >> 16) & 0xFFU;
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buffer[length++] = (m_seqNo >> 8) & 0xFFU;
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buffer[length++] = (m_seqNo >> 0) & 0xFFU;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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// PTT on
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x01U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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// Type, 0 for audio
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 'F';
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buffer[length++] = 'M';
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buffer[length++] = 'D';
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for (unsigned int i = 0U; i < nSamples; i++) {
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short val = short(data[i] * 32767.0F + 0.5F); // Changing audio format from float to S16LE
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@@ -192,170 +101,66 @@ bool CFMNetwork::writeUSRPData(const float* data, unsigned int nSamples)
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buffer[length++] = (val >> 8) & 0xFFU;
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}
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m_seqNo++;
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Sent", buffer, length);
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m_seqNo++;
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return m_socket.write(buffer, length, m_addr, m_addrLen);
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}
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bool CFMNetwork::writeRawData(const float* in, unsigned int nIn)
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bool CFMNetwork::writeStart()
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{
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assert(in != NULL);
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assert(nIn > 0U);
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uint8_t buffer[5U];
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if (m_seqNo == 0U) {
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bool ret = writeRawStart();
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if (!ret)
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return false;
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}
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unsigned char buffer[2000U];
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unsigned int length = 0U;
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#if defined(HAS_SRC)
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if (m_sampleRate != MMDVM_SAMPLERATE) {
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unsigned int nOut = (nIn * m_sampleRate) / MMDVM_SAMPLERATE;
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float out[1000U];
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SRC_DATA data;
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data.data_in = in;
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data.data_out = out;
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data.input_frames = nIn;
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data.output_frames = nOut;
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data.end_of_input = 0;
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data.src_ratio = float(m_sampleRate) / float(MMDVM_SAMPLERATE);
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int ret = ::src_process(m_resampler, &data);
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if (ret != 0) {
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LogError("Error from the write resampler - %d - %s", ret, ::src_strerror(ret));
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return false;
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}
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for (unsigned int i = 0U; i < nOut; i++) {
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short val = short(out[i] * 32767.0F + 0.5F); // Changing audio format from float to S16LE
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buffer[length++] = (val >> 0) & 0xFFU;
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buffer[length++] = (val >> 8) & 0xFFU;
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}
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} else {
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#endif
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for (unsigned int i = 0U; i < nIn; i++) {
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short val = short(in[i] * 32767.0F + 0.5F); // Changing audio format from float to S16LE
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buffer[length++] = (val >> 0) & 0xFFU;
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buffer[length++] = (val >> 8) & 0xFFU;
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}
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#if defined(HAS_SRC)
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}
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#endif
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buffer[0U] = 'F';
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buffer[1U] = 'M';
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buffer[2U] = 'S';
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Sent", buffer, length);
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CUtils::dump(1U, "FM Network Data Sent", buffer, 3U);
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m_seqNo++;
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return m_socket.write(buffer, length, m_addr, m_addrLen);
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return m_socket.write(buffer, 3U, m_addr, m_addrLen);
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}
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bool CFMNetwork::writeEnd()
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{
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if (m_protocol == FMNP_USRP)
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return writeUSRPEnd();
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else
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return writeRawEnd();
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}
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uint8_t buffer[5U];
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bool CFMNetwork::writeUSRPEnd()
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{
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unsigned char buffer[500U];
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::memset(buffer, 0x00U, 500U);
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unsigned int length = 0U;
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buffer[length++] = 'U';
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buffer[length++] = 'S';
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buffer[length++] = 'R';
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buffer[length++] = 'P';
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// Sequence number
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buffer[length++] = (m_seqNo >> 24) & 0xFFU;
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buffer[length++] = (m_seqNo >> 16) & 0xFFU;
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buffer[length++] = (m_seqNo >> 8) & 0xFFU;
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buffer[length++] = (m_seqNo >> 0) & 0xFFU;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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// PTT off
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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// Type, 0 for audio
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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buffer[length++] = 0x00U;
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length += 320U;
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buffer[0U] = 'F';
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buffer[1U] = 'M';
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buffer[2U] = 'E';
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m_seqNo = 0U;
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if (length > 0U) {
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Sent", buffer, length);
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Sent", buffer, 3U);
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return m_socket.write(buffer, length, m_addr, m_addrLen);
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} else {
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return true;
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}
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return m_socket.write(buffer, 3U, m_addr, m_addrLen);
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}
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bool CFMNetwork::writeRawEnd()
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bool CFMNetwork::writePing()
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{
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m_seqNo = 0U;
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uint8_t buffer[5U];
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if (m_fp != NULL) {
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size_t n = ::fwrite("Z", 1, 1, m_fp);
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if (n != 1) {
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#if !defined(_WIN32) && !defined(_WIN64)
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LogError("Cannot write to the squelch file: %s, errno=%d", m_squelchFile.c_str(), errno);
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#else
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LogError("Cannot write to the squelch file: %s, errno=%lu", m_squelchFile.c_str(), ::GetLastError());
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#endif
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return false;
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}
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buffer[0U] = 'F';
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buffer[1U] = 'M';
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buffer[2U] = 'P';
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::fflush(m_fp);
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}
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Sent", buffer, 3U);
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return true;
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return m_socket.write(buffer, 3U, m_addr, m_addrLen);
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}
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void CFMNetwork::clock(unsigned int ms)
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{
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m_timer.clock(ms);
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if (m_timer.isRunning() && m_timer.hasExpired()) {
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writePing();
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m_timer.start();
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}
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unsigned char buffer[BUFFER_LENGTH];
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sockaddr_storage addr;
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@@ -365,43 +170,28 @@ void CFMNetwork::clock(unsigned int ms)
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return;
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// Check if the data is for us
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if (m_protocol == FMNP_USRP) {
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if (!CUDPSocket::match(addr, m_addr, IMT_ADDRESS_AND_PORT)) {
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LogMessage("FM packet received from an invalid source");
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return;
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}
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} else {
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if (!CUDPSocket::match(addr, m_addr, IMT_ADDRESS_ONLY)) {
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LogMessage("FM packet received from an invalid source");
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return;
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}
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if (!CUDPSocket::match(addr, m_addr, IMT_ADDRESS_AND_PORT)) {
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LogMessage("FM packet received from an invalid source");
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return;
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}
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if (!m_enabled)
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return;
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// Invalid packet type?
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if (::memcmp(buffer, "FM", 2U) != 0)
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return;
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if (::memcmp(buffer, "FMP", 3U) == 0)
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return;
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if (m_debug)
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CUtils::dump(1U, "FM Network Data Received", buffer, length);
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if (m_protocol == FMNP_USRP) {
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// Invalid packet type?
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if (::memcmp(buffer, "USRP", 4U) != 0)
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return;
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if (::memcmp(buffer, "FMD", 3U) != 0)
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return;
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if (length < 32)
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return;
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// The type is a big-endian 4-byte integer
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unsigned int type = (buffer[20U] << 24) +
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(buffer[21U] << 16) +
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(buffer[22U] << 8) +
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(buffer[23U] << 0);
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if (type == 0U)
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m_buffer.addData(buffer + 32U, length - 32U);
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} else if (m_protocol == FMNP_RAW) {
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m_buffer.addData(buffer, length);
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}
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m_buffer.addData(buffer + 3U, length - 3U);
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}
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unsigned int CFMNetwork::readData(float* out, unsigned int nOut)
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@@ -413,53 +203,16 @@ unsigned int CFMNetwork::readData(float* out, unsigned int nOut)
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if (bytes == 0U)
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return 0U;
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#if defined(HAS_SRC)
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if ((m_protocol == FMNP_RAW) && (m_sampleRate != MMDVM_SAMPLERATE)) {
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unsigned int nIn = (nOut * m_sampleRate) / MMDVM_SAMPLERATE;
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if (bytes < nOut)
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nOut = bytes;
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if (bytes < nIn) {
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nIn = bytes;
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nOut = (nIn * MMDVM_SAMPLERATE) / m_sampleRate;
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}
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unsigned char buffer[BUFFER_LENGTH];
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m_buffer.getData(buffer, nOut * sizeof(unsigned short));
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unsigned char buffer[2000U];
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m_buffer.getData(buffer, nIn * sizeof(unsigned short));
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float in[1000U];
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for (unsigned int i = 0U; i < nIn; i++) {
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short val = ((buffer[i * 2U + 0U] & 0xFFU) << 0) + ((buffer[i * 2U + 1U] & 0xFFU) << 8);
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in[i] = float(val) / 65536.0F;
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}
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SRC_DATA data;
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data.data_in = in;
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data.data_out = out;
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data.input_frames = nIn;
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data.output_frames = nOut;
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data.end_of_input = 0;
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data.src_ratio = float(MMDVM_SAMPLERATE) / float(m_sampleRate);
|
||||
|
||||
int ret = ::src_process(m_resampler, &data);
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||||
if (ret != 0) {
|
||||
LogError("Error from the read resampler - %d - %s", ret, ::src_strerror(ret));
|
||||
return false;
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||||
}
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} else {
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#endif
|
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if (bytes < nOut)
|
||||
nOut = bytes;
|
||||
|
||||
unsigned char buffer[1500U];
|
||||
m_buffer.getData(buffer, nOut * sizeof(unsigned short));
|
||||
|
||||
for (unsigned int i = 0U; i < nOut; i++) {
|
||||
short val = ((buffer[i * 2U + 0U] & 0xFFU) << 0) + ((buffer[i * 2U + 1U] & 0xFFU) << 8);
|
||||
out[i] = float(val) / 65536.0F;
|
||||
}
|
||||
#if defined(HAS_SRC)
|
||||
for (unsigned int i = 0U; i < nOut; i++) {
|
||||
short val = ((buffer[i * 2U + 0U] & 0xFFU) << 0) + ((buffer[i * 2U + 1U] & 0xFFU) << 8);
|
||||
out[i] = float(val) / 65536.0F;
|
||||
}
|
||||
#endif
|
||||
|
||||
return nOut;
|
||||
}
|
||||
@@ -473,11 +226,6 @@ void CFMNetwork::close()
|
||||
{
|
||||
m_socket.close();
|
||||
|
||||
if (m_fp != NULL) {
|
||||
::fclose(m_fp);
|
||||
m_fp = NULL;
|
||||
}
|
||||
|
||||
LogMessage("Closing FM network connection");
|
||||
}
|
||||
|
||||
@@ -491,121 +239,5 @@ void CFMNetwork::enable(bool enabled)
|
||||
m_enabled = enabled;
|
||||
}
|
||||
|
||||
bool CFMNetwork::writeUSRPStart()
|
||||
{
|
||||
unsigned char buffer[500U];
|
||||
::memset(buffer, 0x00U, 500U);
|
||||
|
||||
unsigned int length = 0U;
|
||||
|
||||
buffer[length++] = 'U';
|
||||
buffer[length++] = 'S';
|
||||
buffer[length++] = 'R';
|
||||
buffer[length++] = 'P';
|
||||
|
||||
// Sequence number
|
||||
buffer[length++] = (m_seqNo >> 24) & 0xFFU;
|
||||
buffer[length++] = (m_seqNo >> 16) & 0xFFU;
|
||||
buffer[length++] = (m_seqNo >> 8) & 0xFFU;
|
||||
buffer[length++] = (m_seqNo >> 0) & 0xFFU;
|
||||
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// PTT off
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Type, 2 for metadata
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x02U;
|
||||
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// TLV TAG for Metadata
|
||||
buffer[length++] = 0x08U;
|
||||
|
||||
// TLV Length
|
||||
buffer[length++] = 3U + 4U + 3U + 1U + 1U + m_callsign.size() + 1U;
|
||||
|
||||
// DMR Id
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Rpt Id
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Talk Group
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Time Slot
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Color Code
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
// Callsign
|
||||
for (std::string::const_iterator it = m_callsign.cbegin(); it != m_callsign.cend(); ++it)
|
||||
buffer[length++] = *it;
|
||||
|
||||
// End of Metadata
|
||||
buffer[length++] = 0x00U;
|
||||
|
||||
length = 70U;
|
||||
|
||||
if (length > 0U) {
|
||||
if (m_debug)
|
||||
CUtils::dump(1U, "FM Network Data Sent", buffer, length);
|
||||
|
||||
return m_socket.write(buffer, length, m_addr, m_addrLen);
|
||||
} else {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
bool CFMNetwork::writeRawStart()
|
||||
{
|
||||
if (m_fp != NULL) {
|
||||
size_t n = ::fwrite("O", 1, 1, m_fp);
|
||||
if (n != 1) {
|
||||
#if !defined(_WIN32) && !defined(_WIN64)
|
||||
LogError("Cannot write to the squelch file: %s, errno=%d", m_squelchFile.c_str(), errno);
|
||||
#else
|
||||
LogError("Cannot write to the squelch file: %s, errno=%lu", m_squelchFile.c_str(), ::GetLastError());
|
||||
#endif
|
||||
return false;
|
||||
}
|
||||
|
||||
::fflush(m_fp);
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
Reference in New Issue
Block a user