mirror of
https://github.com/f4exb/sdrangel.git
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101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
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///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
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// //
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// SDRdaemon sink channel (Rx) data block //
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// //
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// SDRdaemon is a detached SDR front end that handles the interface with a //
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// physical device and sends or receives the I/Q samples stream to or from a //
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// SDRangel instance via UDP. It is controlled via a Web REST API. //
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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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// //
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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 SDRDAEMON_CHANNEL_SDRDAEMONDATABLOCK_H_
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#define SDRDAEMON_CHANNEL_SDRDAEMONDATABLOCK_H_
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#include <stdint.h>
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#include <string.h>
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#include "dsp/dsptypes.h"
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#define UDPSINKFEC_UDPSIZE 512
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#define UDPSINKFEC_NBORIGINALBLOCKS 128
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#define UDPSINKFEC_NBTXBLOCKS 8
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namespace SDRDaemon {
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#pragma pack(push, 1)
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struct MetaDataFEC
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{
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uint32_t m_centerFrequency; //!< 4 center frequency in kHz
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uint32_t m_sampleRate; //!< 8 sample rate in Hz
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uint8_t m_sampleBytes; //!< 9 MSB(4): indicators, LSB(4) number of bytes per sample
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uint8_t m_sampleBits; //!< 10 number of effective bits per sample
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uint8_t m_nbOriginalBlocks; //!< 11 number of blocks with original (protected) data
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uint8_t m_nbFECBlocks; //!< 12 number of blocks carrying FEC
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uint32_t m_tv_sec; //!< 16 seconds of timestamp at start time of super-frame processing
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uint32_t m_tv_usec; //!< 20 microseconds of timestamp at start time of super-frame processing
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uint32_t m_crc32; //!< 24 CRC32 of the above
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bool operator==(const MetaDataFEC& rhs)
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{
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return (memcmp((const void *) this, (const void *) &rhs, 12) == 0); // Only the 12 first bytes are relevant
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}
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void init()
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{
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memset((void *) this, 0, sizeof(MetaDataFEC));
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m_nbFECBlocks = -1;
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}
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};
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struct Header
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{
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uint16_t m_frameIndex;
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uint8_t m_blockIndex;
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uint8_t m_filler;
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};
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static const int samplesPerBlock = (UDPSINKFEC_UDPSIZE - sizeof(Header)) / sizeof(Sample);
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struct ProtectedBlock
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{
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Sample m_samples[samplesPerBlock];
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};
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struct SuperBlock
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{
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Header m_header;
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ProtectedBlock m_protectedBlock;
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};
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#pragma pack(pop)
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struct TxControlBlock
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{
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bool m_processed;
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uint16_t m_frameIndex;
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int m_nbBlocksFEC;
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int m_txDelay;
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};
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class DataBlock
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{
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SuperBlock m_superBlock;
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TxControlBlock m_controlBlock;
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};
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} // namespace SDRDaemon
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#endif /* SDRDAEMON_CHANNEL_SDRDAEMONDATABLOCK_H_ */
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