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+/*
+ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
+ Queen in Right of Canada (Communications Research Center Canada)
+
+ Includes modifications for which no copyright is claimed
+ 2012, Matthias P. Braendli, matthias.braendli@mpb.li
+
+DESCRIPTION:
+ It is an output driver for the USRP family of devices, and uses
+ the UHD library. This version is multi-threaded. One thread runs
+ the whole modulator, and the second threads sends the data to the
+ device. The two threads are synchronised using a barrier. Communication
+ between the two threads is implemented using double buffering. At the
+ barrier, they exchange the buffers.
+*/
+
+/*
+ This file is part of CRC-DADMOD.
+
+ CRC-DADMOD 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.
+
+ CRC-DADMOD 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 CRC-DADMOD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef OUTPUT_UHD_H
+#define OUTPUT_UHD_H
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/usrp/multi_usrp.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/barrier.hpp>
+#include <boost/shared_ptr.hpp>
+
+#include "ModOutput.h"
+#include "EtiReader.h"
+#include "TimestampDecoder.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#define MDEBUG(fmt, args...) fprintf (LOG, fmt , ## args)
+//#define MDEBUG(fmt, args...)
+
+// If the timestamp is further in the future than
+// 100 seconds, abort
+#define TIMESTAMP_ABORT_FUTURE 100
+
+// Add a delay to increase buffers when
+// frames are too far in the future
+#define TIMESTAMP_MARGIN_FUTURE 0.5
+
+typedef std::complex<float> complexf;
+
+using namespace boost;
+
+struct UHDWorkerFrameData {
+ // Buffer holding frame data
+ void* buf;
+
+ // Full timestamp
+ struct frame_timestamp ts;
+
+ // Frame counter
+ uint32_t fct;
+};
+
+
+struct UHDWorkerData {
+ uhd::usrp::multi_usrp::sptr myUsrp;
+ unsigned sampleRate;
+
+ // Double buffering between the two threads
+ // Each buffer contains one OFDM frame, and it's
+ // associated timestamp
+ // A full timestamp contains a TIST according to standard
+ // and time information within MNSC with tx_second.
+ bool sourceContainsTimestamp;
+
+ // When working with timestamps, mute the frames that
+ // do not have a timestamp
+ bool muteNoTimestamps;
+
+ struct UHDWorkerFrameData frame0;
+ struct UHDWorkerFrameData frame1;
+ size_t bufsize; // in bytes
+
+ // A barrier to synchronise the two threads
+ shared_ptr<barrier> sync_barrier;
+};
+
+
+class UHDWorker {
+ public:
+ UHDWorker () {
+ running = false;
+ }
+
+ void start(struct UHDWorkerData *uhdworkerdata) {
+ running = true;
+ uhd_thread = boost::thread(&UHDWorker::process, this, uhdworkerdata);
+ }
+
+ void stop() {
+ running = false;
+ uhd_thread.interrupt();
+ uhd_thread.join();
+ }
+
+ void process(struct UHDWorkerData *uhdworkerdata);
+
+
+ private:
+ struct UHDWorkerData *workerdata;
+ bool running;
+ boost::thread uhd_thread;
+
+ uhd::tx_streamer::sptr myTxStream;
+};
+
+
+class OutputUHD: public ModOutput {
+ public:
+ OutputUHD(char* device, unsigned sampleRate, double frequency, int txgain,
+ bool muteNoTimestamps);
+ ~OutputUHD();
+
+ int process(Buffer* dataIn, Buffer* dataOut);
+
+ const char* name() { return "OutputUHD"; }
+
+ void setETIReader(EtiReader *etiReader) {
+ myEtiReader = etiReader;
+ }
+
+ protected:
+ EtiReader *myEtiReader;
+ std::string myDevice;
+ unsigned mySampleRate;
+ int myTxGain;
+ double myFrequency;
+ uhd::usrp::multi_usrp::sptr myUsrp;
+ shared_ptr<barrier> my_sync_barrier;
+ UHDWorker worker;
+ bool first_run;
+ struct UHDWorkerData uwd;
+ int activebuffer;
+ bool mute_no_timestamps;
+
+ size_t lastLen;
+};
+
+
+#endif // OUTPUT_UHD_H