diff options
| -rw-r--r-- | src/DabMod.cpp | 1 | ||||
| -rw-r--r-- | src/OutputUHD.cpp | 54 | ||||
| -rw-r--r-- | src/OutputUHD.h | 7 |
3 files changed, 51 insertions, 11 deletions
diff --git a/src/DabMod.cpp b/src/DabMod.cpp index 82f03e5..214231c 100644 --- a/src/DabMod.cpp +++ b/src/DabMod.cpp @@ -535,6 +535,7 @@ int main(int argc, char* argv[]) outputuhd_conf.txgain = pt.get("uhdoutput.txgain", 0.0); outputuhd_conf.frequency = pt.get<double>("uhdoutput.frequency", 0); std::string chan = pt.get<std::string>("uhdoutput.channel", ""); + outputuhd_conf.dabMode = dabMode; if (outputuhd_conf.frequency == 0 && chan == "") { std::cerr << " UHD output enabled, but neither frequency nor channel defined.\n"; diff --git a/src/OutputUHD.cpp b/src/OutputUHD.cpp index 741731e..91c030f 100644 --- a/src/OutputUHD.cpp +++ b/src/OutputUHD.cpp @@ -57,11 +57,11 @@ OutputUHD::OutputUHD( // the buffers at object initialisation. first_run(true), activebuffer(1), - myDelayBuf(196608) + myDelayBuf(0) { myMuting = 0; // is remote-controllable - myStaticDelay = 0; // is remote-controllable + myStaticDelayUs = 0; // is remote-controllable #if FAKE_UHD MDEBUG("OutputUHD:Using fake UHD output"); @@ -225,6 +225,7 @@ OutputUHD::OutputUHD( uwd.check_refclk_loss = true; } + SetDelayBuffer(config.dabMode); shared_ptr<barrier> b(new barrier(2)); mySyncBarrier = b; @@ -246,6 +247,35 @@ OutputUHD::~OutputUHD() } } +void OutputUHD::SetDelayBuffer(unsigned int dabMode) +{ + // find out the duration of the transmission frame (Table 2 in ETSI 300 401) + switch (dabMode) { + case 0: // could happen when called from constructor and we take the mode from ETI + myTFDurationMs = 0; + break; + case 1: + myTFDurationMs = 96; + break; + case 2: + myTFDurationMs = 24; + break; + case 3: + myTFDurationMs = 24; + break; + case 4: + myTFDurationMs = 48; + break; + default: + throw std::runtime_error("OutPutUHD: invalid DAB mode"); + } + fprintf(stderr, "DelayBuf = %d\n", myTFDurationMs * myConf.sampleRate / 1000); + // The buffer size equals the number of samples per transmission frame so + // we calculate it by multiplying the duration of the transmission frame + // with the samplerate. + myDelayBuf.resize(myTFDurationMs * myConf.sampleRate / 1000); +} + int OutputUHD::process(Buffer* dataIn, Buffer* dataOut) { struct frame_timestamp ts; @@ -281,6 +311,10 @@ int OutputUHD::process(Buffer* dataIn, Buffer* dataOut) default: break; } + // we only set the delay buffer from the dab mode signaled in ETI if the + // dab mode was not set in contructor + if (myTFDurationMs == 0) + SetDelayBuffer(myEtiReader->getMode()); activebuffer = 1; @@ -307,7 +341,7 @@ int OutputUHD::process(Buffer* dataIn, Buffer* dataOut) myEtiReader->sourceContainsTimestamp(); // calculate delay - uint32_t noSampleDelay = (myStaticDelay * 2048) / 1000; + uint32_t noSampleDelay = (myStaticDelayUs * myConf.sampleRate / 1000) / 1000; uint32_t noByteDelay = noSampleDelay * sizeof(complexf); uint8_t* pInData = (uint8_t*) dataIn->getData(); @@ -655,13 +689,13 @@ void OutputUHD::set_parameter(const string& parameter, const string& value) else if (parameter == "staticdelay") { int adjust; ss >> adjust; - int newStaticDelay = myStaticDelay + adjust; - if (newStaticDelay > 96000) - myStaticDelay = newStaticDelay - 96000; - else if (newStaticDelay < 0) - myStaticDelay = newStaticDelay + 96000; + int newStaticDelayUs = myStaticDelayUs + adjust; + if (newStaticDelayUs > myTFDurationMs * 1000) + myStaticDelayUs = newStaticDelayUs - myTFDurationMs * 1000; + else if (newStaticDelayUs < 0) + myStaticDelayUs = newStaticDelayUs + myTFDurationMs * 1000; else - myStaticDelay = newStaticDelay; + myStaticDelayUs = newStaticDelayUs; } else if (parameter == "iqbalance") { ss >> myConf.frequency; @@ -689,7 +723,7 @@ const string OutputUHD::get_parameter(const string& parameter) const ss << myMuting; } else if (parameter == "staticdelay") { - ss << myStaticDelay; + ss << myStaticDelayUs; } else { ss << "Parameter '" << parameter << diff --git a/src/OutputUHD.h b/src/OutputUHD.h index 7eb6733..d002e98 100644 --- a/src/OutputUHD.h +++ b/src/OutputUHD.h @@ -171,6 +171,7 @@ struct OutputUHDConfig { double txgain; bool enableSync; bool muteNoTimestamps; + unsigned dabMode; /* allowed values : auto, int, sma, mimo */ std::string refclk_src; @@ -231,8 +232,12 @@ class OutputUHD: public ModOutput, public RemoteControllable { bool myMuting; private: + // methods + void SetDelayBuffer(unsigned int dabMode); + // data - int myStaticDelay; + int myStaticDelayUs; // static delay in microseconds + int myTFDurationMs; // TF duration in milliseconds std::vector<complexf> myDelayBuf; size_t lastLen; }; |