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107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef PLUGINS_SAMPLESINK_REMOTEOUTPUT_UDPSINKFEC_H_
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#define PLUGINS_SAMPLESINK_REMOTEOUTPUT_UDPSINKFEC_H_
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#include <channel/remotedatablock.h>
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#include <string.h>
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#include <cstddef>
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#include <QObject>
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#include <QHostAddress>
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#include <QString>
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#include "dsp/dsptypes.h"
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#include "util/CRC64.h"
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class UDPSinkFECWorker;
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class UDPSinkFEC : public QObject
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{
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Q_OBJECT
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public:
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static const uint32_t m_udpSize = 512; //!< Size of UDP block in number of bytes
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static const uint32_t m_nbOriginalBlocks = 128; //!< Number of original blocks in a protected block sequence
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/**
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* Construct UDP sink
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*/
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UDPSinkFEC();
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/** Destroy UDP sink */
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~UDPSinkFEC();
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void start();
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void stop();
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/**
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* Write IQ samples
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*/
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void write(const SampleVector::iterator& begin, uint32_t sampleChunkSize);
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/** Return the last error, or return an empty string if there is no error. */
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std::string error()
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{
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std::string ret(m_error);
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m_error.clear();
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return ret;
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}
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/** Set sample rate given in S/s */
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void setSampleRate(uint32_t sampleRate);
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void setNbBlocksFEC(uint32_t nbBlocksFEC);
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void setTxDelay(float txDelayRatio);
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void setRemoteAddress(const QString& address, uint16_t port);
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/** Return true if the stream is OK, return false if there is an error. */
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operator bool() const
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{
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return m_error.empty();
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}
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private:
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std::string m_error;
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uint32_t m_sampleRate; //!< sample rate in Hz
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uint32_t m_nbSamples; //!< total number of samples sent int the last frame
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QHostAddress m_ownAddress;
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CRC64 m_crc64;
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uint8_t* m_bufMeta;
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uint8_t* m_buf;
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RemoteMetaDataFEC m_currentMetaFEC; //!< Meta data for current frame
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uint32_t m_nbBlocksFEC; //!< Variable number of FEC blocks
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float m_txDelayRatio; //!< Delay in ratio of nominal frame period
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uint32_t m_txDelay; //!< Delay in microseconds (usleep) between each sending of an UDP datagram
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RemoteSuperBlock m_txBlocks[4][256]; //!< UDP blocks to send with original data + FEC
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RemoteSuperBlock m_superBlock; //!< current super block being built
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int m_txBlockIndex; //!< Current index in blocks to transmit in the Tx row
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int m_txBlocksIndex; //!< Current index of Tx blocks row
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uint16_t m_frameCount; //!< transmission frame count
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int m_sampleIndex; //!< Current sample index in protected block data
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UDPSinkFECWorker *m_udpWorker;
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QString m_remoteAddress;
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uint16_t m_remotePort;
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};
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#endif /* PLUGINS_SAMPLESINK_REMOTEOUTPUT_UDPSINKFEC_H_ */
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