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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
*/
/*
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
#include "Eti.h"
#include "Log.h"
#include "FicSource.h"
#include "SubchannelSource.h"
#include "TimestampDecoder.h"
#include "lib/edi/ETIDecoder.hpp"
#include "lib/UdpSocket.h"
#include "ThreadsafeQueue.h"
#include <vector>
#include <memory>
#include <stdint.h>
#include <sys/types.h>
/* The modulator uses this interface to get the necessary multiplex data,
* either from an ETI or an EDI source.
*/
class EtiSource
{
public:
/* Get the DAB Transmission Mode. Valid values: 1, 2, 3 or 4 */
virtual unsigned getMode() = 0;
/* Get the current Frame Phase */
virtual unsigned getFp() = 0;
/* Returns true if we have valid time stamps in the ETI*/
virtual bool sourceContainsTimestamp() = 0;
virtual void calculateTimestamp(struct frame_timestamp& ts) = 0;
/* Return the FIC source to be used for modulation */
virtual std::shared_ptr<FicSource>& getFic(void);
/* Return all subchannel sources containing MST data */
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const = 0;
protected:
std::shared_ptr<FicSource> myFicSource;
};
/* The EtiReader extracts the necessary data for modulation from an ETI(NI) byte stream. */
class EtiReader : public EtiSource
{
public:
EtiReader(
double& tist_offset_s,
unsigned tist_delay_stages);
virtual unsigned getMode();
virtual unsigned getFp();
/* Read ETI data from dataIn. Returns the number of bytes
* read from the buffer.
*/
int loadEtiData(const Buffer& dataIn);
virtual bool sourceContainsTimestamp();
virtual void calculateTimestamp(struct frame_timestamp& ts)
{
myTimestampDecoder.calculateTimestamp(ts);
}
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const;
private:
/* Transform the ETI TIST to a PPS offset in units of 1/16384000 s */
uint32_t getPPSOffset();
int state;
uint32_t nb_frames;
uint16_t framesize;
eti_SYNC eti_sync;
eti_FC eti_fc;
std::vector<eti_STC> eti_stc;
eti_EOH eti_eoh;
eti_EOF eti_eof;
eti_TIST eti_tist;
TimestampDecoder myTimestampDecoder;
size_t myCurrentFrame;
bool eti_fc_valid;
std::vector<std::shared_ptr<SubchannelSource> > mySources;
};
/* The EdiReader extracts the necessary data using the EDI input library in
* lib/edi
*/
class EdiReader : public EtiSource, public EdiDecoder::DataCollector
{
public:
virtual unsigned getMode();
virtual unsigned getFp();
virtual bool sourceContainsTimestamp() { return false; }
virtual void calculateTimestamp(struct frame_timestamp& ts)
{ /* TODO */ }
virtual const std::vector<std::shared_ptr<SubchannelSource> > getSubchannels() const;
virtual bool isFrameReady(void);
virtual void clearFrame(void);
// Tell the ETIWriter what EDI protocol we receive in *ptr.
// This is not part of the ETI data, but is used as check
virtual void update_protocol(
const std::string& proto,
uint16_t major,
uint16_t minor);
// Update the data for the frame characterisation
virtual void update_fc_data(const EdiDecoder::eti_fc_data& fc_data);
virtual void update_fic(const std::vector<uint8_t>& fic);
virtual void update_err(uint8_t err);
// In addition to TSTA in ETI, EDI also transports more time
// stamp information.
virtual void update_edi_time(
uint32_t utco,
uint32_t seconds);
virtual void update_mnsc(uint16_t mnsc);
virtual void update_rfu(uint16_t rfu);
virtual void add_subchannel(const EdiDecoder::eti_stc_data& stc);
// Gets called by the EDI library to tell us that all data for a frame was given to us
virtual void assemble(void);
private:
bool m_proto_valid = false;
bool m_frameReady = false;
uint8_t m_err;
bool m_fc_valid = false;
EdiDecoder::eti_fc_data m_fc;
std::vector<uint8_t> m_fic;
bool m_time_valid = false;
uint32_t m_utco;
uint32_t m_seconds;
uint16_t m_mnsc = 0xffff;
// 16 bits: RFU field in EOH
uint16_t m_rfu = 0xffff;
std::map<uint8_t, std::shared_ptr<SubchannelSource> > m_sources;
};
/* The EDI input does not use the inputs defined in InputReader.h, as they were designed
* for ETI. It uses the EdiUdpInput which in turn uses a threaded receiver.
*/
class EdiUdpInput {
public:
EdiUdpInput(EdiDecoder::ETIDecoder& decoder);
void Open(const std::string& uri);
bool isEnabled(void) const { return m_enabled; }
/* Receive a packet and give it to the decoder. Returns
* true if a packet was received, false in case of socket
* read was interrupted by a signal.
*/
bool rxPacket(void);
private:
bool m_enabled;
int m_port;
UdpReceiver m_udp_rx;
EdiDecoder::ETIDecoder& m_decoder;
};
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