mirror of
https://github.com/f4exb/sdrangel.git
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180 lines
8.3 KiB
C++
180 lines
8.3 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_SDRDAEMONBUFFER_H_
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#define PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_
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#include <QString>
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#include <cstdlib>
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#include "util/CRC64.h"
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class SDRdaemonBuffer
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{
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public:
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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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SDRdaemonBuffer(uint32_t throttlems);
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~SDRdaemonBuffer();
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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 *readData(int32_t length);
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void updateBlockCounts(uint32_t nbBytesReceived);
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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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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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float getBufferLengthInSecs() const { return m_bufferLenSec; }
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void setAutoFollowRate(bool autoFollowRate) { m_autoFollowRate = autoFollowRate; }
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void setAutoCorrBuffer(bool autoCorrBuffer) { m_autoCorrBuffer = autoCorrBuffer; }
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void setResetIndexes() { m_resetIndexes = true; }
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int32_t getRWBalanceCorrection() const { return m_balCorrection; }
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/** Get buffer gauge value in % of buffer size ([-50:50])
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* [-50:0] : write leads or read lags
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* [0:50] : read leads or write lags
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*/
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inline int32_t getBufferGauge() const
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{
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if (m_rawSize)
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{
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int32_t val = ((m_writeIndex - m_readIndex) * 100) / (int32_t) m_rawSize;
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if (val < -50) {
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return val + 100; // read leads (positive)
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} else if (val < 50) {
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return val; // read leads (positive) or write leads (negative)
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} else {
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return val - 100; // write leads (negative)
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}
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}
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else
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{
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return -50; // default position
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}
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}
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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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static const int m_rawBufferLengthSeconds;
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static const int m_rawBufferMinNbFrames; //!< Minimum number of frames for the length of buffer
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private:
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void updateBufferSize(uint32_t sampleRate);
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void updateLZ4Sizes(uint32_t frameSize);
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void updateReadBufferSize(uint32_t length);
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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 resetIndexes();
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static void printMeta(const QString& header, MetaData *metaData);
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uint32_t m_throttlemsNominal; //!< Initial throttle in ms
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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_sampleRateStream; //!< Current sample rate from the stream meta data
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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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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_nbBlocks; //!< Number of UDP blocks received in the current frame
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uint32_t m_bytesInBlock; //!< Number of bytes received in the current UDP block
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uint64_t m_dataCRC; //!< CRC64 of the data block
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uint32_t m_inCount; //!< Current position of uncompressed 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_lz4InBuffer; //!< Buffer for LZ4 compressed input
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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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float m_bufferLenSec; //!< Raw buffer length in seconds
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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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int32_t m_writeIndex; //!< Current write position in the raw samples buffer
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int32_t m_readIndex; //!< Current read position in the raw samples buffer
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uint32_t m_readSize; //!< Read buffer size
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uint8_t *m_readBuffer; //!< Read buffer to hold samples when looping back to beginning of raw buffer
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bool m_autoFollowRate; //!< Auto follow stream sample rate else stick with meta data sample rate
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bool m_autoCorrBuffer; //!< Auto correct buffer read / write balance (attempt to ...)
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bool m_skewTest;
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bool m_skewCorrection; //!< Do a skew rate correction at next meta data reception
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bool m_resetIndexes; //!< Do a reset indexes at next meta data reception
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int64_t m_readCount; //!< Number of bytes read for auto skew compensation
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int64_t m_writeCount; //!< Number of bytes written for auto skew compensation
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uint32_t m_nbCycles; //!< Number of buffer cycles since start of auto skew compensation byte counting
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uint32_t m_nbReads; //!< Number of buffer reads since start of auto R/W balance correction period
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int32_t m_balCorrection; //!< R/W balance correction in number of samples
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int32_t m_balCorrLimit; //!< Correction absolute value limit in number of samples
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};
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#endif /* PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_ */
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