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/*
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;
/* The amount of prebuffering to do before we start streaming
*
* Same units as buffer_size
*/
size_t prebuffering;
};
/*
* 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
// 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;
};
};
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