1 files changed, 126 insertions, 0 deletions
diff --git a/src/input/Edi.h b/src/input/Edi.h
new file mode 100644
index 0000000..ca465bd
--- /dev/null
+++ b/src/input/Edi.h
@@ -0,0 +1,126 @@
+/*
+   Copyright (C) 2009 Her Majesty the Queen in Right of Canada (Communications
+   Research Center Canada)
+
+   Copyright (C) 2019
+   Matthias P. Braendli, matthias.braendli@mpb.li
+
+    http://www.opendigitalradio.org
+   */
+/*
+   This file is part of ODR-DabMux.
+
+   ODR-DabMux 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-DabMux 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-DabMux.  If not, see <http://www.gnu.org/licenses/>.
+   */
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <deque>
+#include <thread>
+#include <mutex>
+#include "Socket.h"
+#include "input/inputs.h"
+#include "edi/STIDecoder.hpp"
+#include "edi/STIWriter.hpp"
+#include "ThreadsafeQueue.h"
+#include "ManagementServer.h"
+
+namespace Inputs {
+
+struct dab_input_edi_config_t
+{
+    /* The size of the internal buffer, measured in number
+     * of elements.
+     *
+     * Each element corresponds to one frame, i.e. 24ms
+     */
+    size_t buffer_size = 100;
+
+    /* The amount of prebuffering to do before we start streaming
+     *
+     * Same units as buffer_size
+     */
+    size_t prebuffering = 30;
+};
+
+/*
+ * Receives EDI from UDP or TCP in a separate thread and pushes that data
+ * into the STIDecoder. Complete frames are then put into a queue for the consumer.
+ *
+ * This way, the EDI decoding happens in a separate thread.
+ */
+class Edi : public InputBase, public RemoteControllable {
+    public:
+        Edi(const std::string& name, const dab_input_edi_config_t& config);
+        Edi(const Edi&) = delete;
+        Edi& operator=(const Edi&) = delete;
+        ~Edi();
+
+        virtual void open(const std::string& name);
+        virtual size_t readFrame(uint8_t *buffer, size_t size);
+        virtual size_t readFrame(uint8_t *buffer, size_t size, std::time_t seconds, int utco, uint32_t tsta);
+        virtual int setBitrate(int bitrate);
+        virtual void close();
+
+        /* Remote control */
+        virtual void set_parameter(const std::string& parameter, const std::string& value);
+        virtual const std::string get_parameter(const std::string& parameter) const;
+
+    protected:
+        void m_run();
+
+        void m_new_sti_frame_callback(EdiDecoder::sti_frame_t&& frame);
+
+        std::mutex m_mutex;
+
+        enum class InputUsed { Invalid, UDP, TCP };
+        InputUsed m_input_used = InputUsed::Invalid;
+        Socket::UDPSocket m_udp_sock;
+        Socket::TCPReceiveServer m_tcp_receive_server;
+
+        EdiDecoder::STIWriter m_sti_writer;
+        EdiDecoder::STIDecoder m_sti_decoder;
+        std::thread m_thread;
+        std::atomic<bool> m_running = ATOMIC_VAR_INIT(false);
+        ThreadsafeQueue<EdiDecoder::sti_frame_t> m_frames;
+
+        // InputBase defines bufferManagement and tist delay
+
+        // Used in timestamp-based buffer management
+        EdiDecoder::sti_frame_t m_pending_sti_frame;
+
+        // State variable used in prebuffering-based buffer management
+        bool m_is_prebuffering = true;
+
+        /* When using prebuffering, consider the buffer to be full on the
+         * receive side if it's above the overrun threshold.
+         *
+         * When using timestamping, start discarding the front of the queue once the queue
+         * is this full. Must be smaller than m_max_frames_queued.
+         *
+         * Parameter 'buffer' inside RC. */
+        std::atomic<size_t> m_max_frames_overrun = ATOMIC_VAR_INIT(1000);
+
+        /* When not using timestamping, how many frames to prebuffer.
+         * Parameter 'prebuffering' inside RC. */
+        std::atomic<size_t> m_num_frames_prebuffering = ATOMIC_VAR_INIT(10);
+
+        std::string m_name;
+        InputStat m_stats;
+};
+
+};
+