mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-17 13:51:47 -05:00
180 lines
8.3 KiB
C++
180 lines
8.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2016 Edouard Griffiths, F4EXB //
|
|
// //
|
|
// This program 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 as version 3 of the License, or //
|
|
// //
|
|
// This program 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_
|
|
#define PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_
|
|
|
|
#include <QString>
|
|
#include <cstdlib>
|
|
|
|
#include "util/CRC64.h"
|
|
|
|
class SDRdaemonBuffer
|
|
{
|
|
public:
|
|
public:
|
|
#pragma pack(push, 1)
|
|
struct MetaData
|
|
{
|
|
// critical data
|
|
uint32_t m_centerFrequency; //!< center frequency in kHz
|
|
uint32_t m_sampleRate; //!< sample rate in Hz
|
|
uint8_t m_sampleBytes; //!< MSB(4): indicators, LSB(4) number of bytes per sample
|
|
uint8_t m_sampleBits; //!< number of effective bits per sample
|
|
uint16_t m_blockSize; //!< payload size
|
|
uint32_t m_nbSamples; //!< number of samples in a hardware block
|
|
// end of critical data
|
|
uint16_t m_nbBlocks; //!< number of hardware blocks in the frame
|
|
uint32_t m_nbBytes; //!< total number of bytes in the frame
|
|
uint32_t m_tv_sec; //!< seconds of timestamp at start time of frame processing
|
|
uint32_t m_tv_usec; //!< microseconds of timestamp at start time of frame processing
|
|
uint64_t m_crc; //!< 64 bit CRC of the above
|
|
|
|
bool operator==(const MetaData& rhs)
|
|
{
|
|
return (memcmp((const void *) this, (const void *) &rhs, 20) == 0); // Only the 20 first bytes are relevant (critical)
|
|
}
|
|
|
|
void init()
|
|
{
|
|
memset((void *) this, 0, sizeof(MetaData));
|
|
}
|
|
|
|
void operator=(const MetaData& rhs)
|
|
{
|
|
memcpy((void *) this, (const void *) &rhs, sizeof(MetaData));
|
|
}
|
|
};
|
|
#pragma pack(pop)
|
|
|
|
SDRdaemonBuffer(uint32_t throttlems);
|
|
~SDRdaemonBuffer();
|
|
|
|
bool readMeta(char *array, uint32_t length); //!< Attempt to read meta. Returns true if meta block
|
|
void writeData(char *array, uint32_t length); //!< Write data into buffer.
|
|
uint8_t *readData(int32_t length);
|
|
void updateBlockCounts(uint32_t nbBytesReceived);
|
|
|
|
const MetaData& getCurrentMeta() const { return m_currentMeta; }
|
|
uint32_t getSampleRateStream() const { return m_sampleRateStream; }
|
|
uint32_t getSampleRate() const { return m_sampleRate; }
|
|
bool isSync() const { return m_sync; }
|
|
bool isSyncLocked() const { return m_syncLock; }
|
|
uint32_t getFrameSize() const { return m_frameSize; }
|
|
bool isLz4Compressed() const { return m_lz4; }
|
|
float getCompressionRatio() const { return (m_frameSize > 0 ? (float) m_lz4InSize / (float) m_frameSize : 1.0); }
|
|
uint32_t getLz4DataCRCOK() const { return m_nbLastLz4CRCOK; }
|
|
uint32_t getLz4SuccessfulDecodes() const { return m_nbLastLz4SuccessfulDecodes; }
|
|
float getBufferLengthInSecs() const { return m_bufferLenSec; }
|
|
void setAutoFollowRate(bool autoFollowRate) { m_autoFollowRate = autoFollowRate; }
|
|
void setAutoCorrBuffer(bool autoCorrBuffer) { m_autoCorrBuffer = autoCorrBuffer; }
|
|
void setResetIndexes() { m_resetIndexes = true; }
|
|
int32_t getRWBalanceCorrection() const { return m_balCorrection; }
|
|
|
|
/** Get buffer gauge value in % of buffer size ([-50:50])
|
|
* [-50:0] : write leads or read lags
|
|
* [0:50] : read leads or write lags
|
|
*/
|
|
inline int32_t getBufferGauge() const
|
|
{
|
|
if (m_rawSize)
|
|
{
|
|
int32_t val = ((m_writeIndex - m_readIndex) * 100) / (int32_t) m_rawSize;
|
|
|
|
if (val < -50) {
|
|
return val + 100; // read leads (positive)
|
|
} else if (val < 50) {
|
|
return val; // read leads (positive) or write leads (negative)
|
|
} else {
|
|
return val - 100; // write leads (negative)
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return -50; // default position
|
|
}
|
|
}
|
|
|
|
static const int m_udpPayloadSize;
|
|
static const int m_sampleSize;
|
|
static const int m_iqSampleSize;
|
|
static const int m_rawBufferLengthSeconds;
|
|
static const int m_rawBufferMinNbFrames; //!< Minimum number of frames for the length of buffer
|
|
|
|
private:
|
|
void updateBufferSize(uint32_t sampleRate);
|
|
void updateLZ4Sizes(uint32_t frameSize);
|
|
void updateReadBufferSize(uint32_t length);
|
|
void writeDataLZ4(const char *array, uint32_t length);
|
|
void writeToRawBufferLZ4();
|
|
void writeToRawBufferUncompressed(const char *array, uint32_t length);
|
|
void resetIndexes();
|
|
|
|
static void printMeta(const QString& header, MetaData *metaData);
|
|
|
|
uint32_t m_throttlemsNominal; //!< Initial throttle in ms
|
|
uint32_t m_rawSize; //!< Size of the raw samples buffer in bytes
|
|
uint8_t *m_rawBuffer; //!< Buffer for raw samples obtained from UDP (I/Q not in a formal I/Q structure)
|
|
uint32_t m_sampleRateStream; //!< Current sample rate from the stream meta data
|
|
uint32_t m_sampleRate; //!< Current actual sample rate in Hz
|
|
uint8_t m_sampleBytes; //!< Current number of bytes per I or Q sample
|
|
uint8_t m_sampleBits; //!< Current number of effective bits per sample
|
|
|
|
bool m_sync; //!< Meta data acquired
|
|
bool m_syncLock; //!< Meta data expected (Stream synchronized)
|
|
bool m_lz4; //!< Stream is compressed with LZ4
|
|
MetaData m_currentMeta; //!< Stored current meta data
|
|
CRC64 m_crc64; //!< CRC64 calculator
|
|
uint32_t m_nbBlocks; //!< Number of UDP blocks received in the current frame
|
|
uint32_t m_bytesInBlock; //!< Number of bytes received in the current UDP block
|
|
uint64_t m_dataCRC; //!< CRC64 of the data block
|
|
uint32_t m_inCount; //!< Current position of uncompressed input
|
|
uint32_t m_lz4InCount; //!< Current position in LZ4 input buffer
|
|
uint32_t m_lz4InSize; //!< Size in bytes of the LZ4 input data
|
|
uint8_t *m_lz4InBuffer; //!< Buffer for LZ4 compressed input
|
|
uint8_t *m_lz4OutBuffer; //!< Buffer for LZ4 uncompressed output
|
|
uint32_t m_frameSize; //!< Size in bytes of one uncompressed frame
|
|
float m_bufferLenSec; //!< Raw buffer length in seconds
|
|
uint32_t m_nbLz4Decodes;
|
|
uint32_t m_nbLz4SuccessfulDecodes;
|
|
uint32_t m_nbLz4CRCOK;
|
|
uint32_t m_nbLastLz4SuccessfulDecodes;
|
|
uint32_t m_nbLastLz4CRCOK;
|
|
|
|
int32_t m_writeIndex; //!< Current write position in the raw samples buffer
|
|
int32_t m_readIndex; //!< Current read position in the raw samples buffer
|
|
uint32_t m_readSize; //!< Read buffer size
|
|
uint8_t *m_readBuffer; //!< Read buffer to hold samples when looping back to beginning of raw buffer
|
|
|
|
bool m_autoFollowRate; //!< Auto follow stream sample rate else stick with meta data sample rate
|
|
bool m_autoCorrBuffer; //!< Auto correct buffer read / write balance (attempt to ...)
|
|
bool m_skewTest;
|
|
bool m_skewCorrection; //!< Do a skew rate correction at next meta data reception
|
|
bool m_resetIndexes; //!< Do a reset indexes at next meta data reception
|
|
|
|
int64_t m_readCount; //!< Number of bytes read for auto skew compensation
|
|
int64_t m_writeCount; //!< Number of bytes written for auto skew compensation
|
|
uint32_t m_nbCycles; //!< Number of buffer cycles since start of auto skew compensation byte counting
|
|
|
|
uint32_t m_nbReads; //!< Number of buffer reads since start of auto R/W balance correction period
|
|
int32_t m_balCorrection; //!< R/W balance correction in number of samples
|
|
int32_t m_balCorrLimit; //!< Correction absolute value limit in number of samples
|
|
};
|
|
|
|
|
|
|
|
#endif /* PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_ */
|