mirror of
https://github.com/f4exb/sdrangel.git
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137 lines
6.4 KiB
C++
137 lines
6.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 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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// //
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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_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFEROLD_H_
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#define PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFEROLD_H_
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#include <stdint.h>
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#include <cstring>
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#include <cstddef>
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#include <lz4.h>
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#include "util/CRC64.h"
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#include "dsp/samplefifo.h"
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class SDRdaemonBufferOld
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{
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public:
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#pragma pack(push, 1)
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struct MetaData
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{
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// critical data
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uint32_t m_centerFrequency; //!< center frequency in kHz
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uint32_t m_sampleRate; //!< sample rate in Hz
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uint8_t m_sampleBytes; //!< MSB(4): indicators, LSB(4) number of bytes per sample
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uint8_t m_sampleBits; //!< number of effective bits per sample
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uint16_t m_blockSize; //!< payload size
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uint32_t m_nbSamples; //!< number of samples in a hardware block
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// end of critical data
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uint16_t m_nbBlocks; //!< number of hardware blocks in the frame
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uint32_t m_nbBytes; //!< total number of bytes in the frame
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uint32_t m_tv_sec; //!< seconds of timestamp at start time of frame processing
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uint32_t m_tv_usec; //!< microseconds of timestamp at start time of frame processing
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uint64_t m_crc; //!< 64 bit CRC of the above
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bool operator==(const MetaData& rhs)
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{
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return (memcmp((const void *) this, (const void *) &rhs, 20) == 0); // Only the 20 first bytes are relevant (critical)
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}
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void init()
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{
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memset((void *) this, 0, sizeof(MetaData));
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}
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void operator=(const MetaData& rhs)
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{
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memcpy((void *) this, (const void *) &rhs, sizeof(MetaData));
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}
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};
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#pragma pack(pop)
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SDRdaemonBufferOld(uint32_t rateDivider);
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~SDRdaemonBufferOld();
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bool readMeta(char *array, uint32_t length); //!< Attempt to read meta. Returns true if meta block
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void writeData(char *array, uint32_t length); //!< Write data into buffer.
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uint8_t *readDataChunk(); //!< Read a chunk of data from buffer
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const MetaData& getCurrentMeta() const { return m_currentMeta; }
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uint32_t getSampleRateStream() const { return m_sampleRateStream; }
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uint32_t getSampleRate() const { return m_sampleRate; }
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void updateBlockCounts(uint32_t nbBytesReceived);
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bool isSync() const { return m_sync; }
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bool isSyncLocked() const { return m_syncLock; }
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uint32_t getFrameSize() const { return m_frameSize; }
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bool isLz4Compressed() const { return m_lz4; }
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float getCompressionRatio() const { return (m_frameSize > 0 ? (float) m_lz4InSize / (float) m_frameSize : 1.0); }
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uint32_t getLz4DataCRCOK() const { return m_nbLastLz4CRCOK; }
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uint32_t getLz4SuccessfulDecodes() const { return m_nbLastLz4SuccessfulDecodes; }
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void setAutoFollowRate(bool autoFollowRate) { m_autoFollowRate = autoFollowRate; }
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static const int m_udpPayloadSize;
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static const int m_sampleSize;
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static const int m_iqSampleSize;
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private:
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void updateLZ4Sizes(uint32_t frameSize);
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void writeDataLZ4(const char *array, uint32_t length);
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void writeToRawBufferLZ4();
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void writeToRawBufferUncompressed(const char *array, uint32_t length);
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void updateBufferSize(uint32_t sampleRate);
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void printMeta(MetaData *metaData);
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uint32_t m_rateDivider; //!< Number of times per seconds the samples are fetched
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bool m_sync; //!< Meta data acquired
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bool m_syncLock; //!< Meta data expected (Stream synchronized)
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bool m_lz4; //!< Stream is compressed with LZ4
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MetaData m_currentMeta; //!< Stored current meta data
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CRC64 m_crc64; //!< CRC64 calculator
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uint32_t m_inCount; //!< Current position of uncompressed input
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uint8_t *m_lz4InBuffer; //!< Buffer for LZ4 compressed input
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uint32_t m_lz4InCount; //!< Current position in LZ4 input buffer
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uint32_t m_lz4InSize; //!< Size in bytes of the LZ4 input data
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uint8_t *m_lz4OutBuffer; //!< Buffer for LZ4 uncompressed output
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uint32_t m_frameSize; //!< Size in bytes of one uncompressed frame
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uint32_t m_nbLz4Decodes;
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uint32_t m_nbLz4SuccessfulDecodes;
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uint32_t m_nbLz4CRCOK;
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uint32_t m_nbLastLz4SuccessfulDecodes;
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uint32_t m_nbLastLz4CRCOK;
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uint64_t m_dataCRC;
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uint32_t m_sampleRateStream; //!< Current sample rate from the stream
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uint32_t m_sampleRate; //!< Current actual sample rate in Hz
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uint8_t m_sampleBytes; //!< Current number of bytes per I or Q sample
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uint8_t m_sampleBits; //!< Current number of effective bits per sample
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uint32_t m_writeIndex; //!< Current write position in the raw samples buffer
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uint32_t m_readChunkIndex; //!< Current read chunk index in the raw samples buffer
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uint32_t m_rawSize; //!< Size of the raw samples buffer in bytes
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uint8_t *m_rawBuffer; //!< Buffer for raw samples obtained from UDP (I/Q not in a formal I/Q structure)
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uint32_t m_chunkSize; //!< Size of a chunk of samples in bytes
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uint32_t m_bytesInBlock; //!< Number of bytes received in the current UDP block
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uint32_t m_nbBlocks; //!< Number of UDP blocks received in the current frame
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uint32_t m_readCycles; //!< Count of read cycles over raw buiffer
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uint32_t m_lastWriteIndex; //!< Write index at last skew estimation
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double m_skewRateSum;
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double m_skewRate;
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bool m_autoFollowRate; //!< Aito follow stream sample rate else stick with meta data sample rate
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};
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#endif /* PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFEROLD_H_ */
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