Add support for SoapySDR

1 files changed, 138 insertions, 0 deletions

diff --git a/src/OutputSoapy.h b/src/OutputSoapy.h
new file mode 100644
index 0000000..230f11b
--- /dev/null
+++ b/src/OutputSoapy.h
@@ -0,0 +1,138 @@
+/*
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
+   Queen in Right of Canada (Communications Research Center Canada)
+
+   Copyright (C) 2017
+   Matthias P. Braendli, matthias.braendli@mpb.li
+
+    http://opendigitalradio.org
+
+DESCRIPTION:
+   It is an output driver using the SoapySDR library that can output to
+   many devices.
+*/
+
+/*
+   This file is part of ODR-DabMod.
+
+   ODR-DabMod 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.
+
+   ODR-DabMod 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 ODR-DabMod.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#ifdef HAVE_CONFIG_H
+#   include <config.h>
+#endif
+
+#ifdef HAVE_SOAPYSDR
+#include <SoapySDR/Version.hpp>
+#include <SoapySDR/Modules.hpp>
+#include <SoapySDR/Registry.hpp>
+#include <SoapySDR/Device.hpp>
+
+#include <string>
+#include <memory>
+
+#include "ModPlugin.h"
+#include "EtiReader.h"
+#include "RemoteControl.h"
+#include "ThreadsafeQueue.h"
+
+typedef std::complex<float> complexf;
+
+/* This structure is used as initial configuration for the Soapy output.
+ * It must also contain all remote-controllable settings, otherwise
+ * they will get lost on a modulator restart. */
+struct OutputSoapyConfig {
+    std::string device;
+
+    long masterClockRate = 32768000;
+    unsigned sampleRate = 2048000;
+    double frequency = 0.0;
+    double txgain = 0.0;
+    unsigned dabMode = 0;
+};
+
+// Each frame contains one OFDM frame, and its
+// associated timestamp
+struct SoapyWorkerFrameData {
+    // Buffer holding frame data
+    std::vector<uint8_t> buf;
+
+    // A full timestamp contains a TIST according to standard
+    // and time information within MNSC with tx_second.
+    struct frame_timestamp ts;
+};
+
+class SoapyWorker
+{
+    public:
+        ThreadsafeQueue<SoapyWorkerFrameData> queue;
+        SoapySDR::Device *m_device;
+        std::atomic<bool> running;
+        size_t underflows;
+        size_t overflows;
+
+        SoapyWorker() {}
+        SoapyWorker(const SoapyWorker&) = delete;
+        SoapyWorker operator=(const SoapyWorker&) = delete;
+        ~SoapyWorker() { stop(); }
+
+        void start(SoapySDR::Device *device);
+        void stop(void);
+
+    private:
+        std::thread m_thread;
+
+        void process_start(void);
+        void process(SoapySDR::Stream *stream);
+};
+
+class OutputSoapy: public ModOutput, public RemoteControllable
+{
+    public:
+        OutputSoapy(OutputSoapyConfig& config);
+        OutputSoapy(const OutputSoapy& other) = delete;
+        OutputSoapy& operator=(const OutputSoapy& other) = delete;
+        ~OutputSoapy();
+
+        int process(Buffer* dataIn);
+
+        const char* name() { return "OutputSoapy"; }
+
+        void setETISource(EtiSource *etiSource);
+
+        /*********** REMOTE CONTROL ***************/
+
+        /* Base function to set parameters. */
+        virtual void set_parameter(const std::string& parameter,
+                const std::string& value);
+
+        /* Getting a parameter always returns a string. */
+        virtual const std::string get_parameter(
+                const std::string& parameter) const;
+
+
+    protected:
+        SoapyWorker m_worker;
+        EtiSource *m_eti_source;
+        OutputSoapyConfig& m_conf;
+
+        SoapySDR::Device *m_device;
+
+        bool first_run = true;
+};
+
+
+#endif //HAVE_SOAPYSDR