SDRdaemon plugin: new classes

2026-06-02 22:14:45 -04:00 · 2016-01-24 23:38:55 +01:00
parent 1850452601
commit 7a6882829a
8 changed files with 717 additions and 66 deletions
@@ -0,0 +1,94 @@
+///////////////////////////////////////////////////////////////////////////////////
+// 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 <stdint.h>
+#include <cstring>
+#include <cstddef>
+#include <lz4.h>
+#include "util/CRC64.h"
+
+class SDRdaemonBuffer
+{
+public:
+#pragma pack(push, 1)
+	struct MetaData
+	{
+        // critical data
+		uint64_t m_centerFrequency;   //!< center frequency in Hz
+		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(std::size_t blockSize);
+	~SDRdaemonBuffer();
+	bool writeAndRead(uint8_t *array, std::size_t length, uint8_t *data, std::size_t& dataLength);
+	const MetaData& getCurrentMeta() const { return m_currentMeta; }
+
+private:
+	bool writeAndReadLZ4(uint8_t *array, std::size_t length, uint8_t *data, std::size_t& dataLength);
+	void updateSizes(MetaData *metaData);
+    void printMeta(MetaData *metaData);
+
+	std::size_t m_blockSize; //!< UDP block (payload) size
+	bool m_sync;             //!< Meta data acquired (Stream synchronized)
+	bool m_lz4;              //!< Stream is compressed with LZ4
+	MetaData m_currentMeta;  //!< Stored current meta data
+	CRC64 m_crc64;           //!< CRC64 calculator
+	uint8_t *m_buf;          //!< UDP block buffer
+
+    uint8_t *m_lz4InBuffer;           //!< Buffer for LZ4 compressed 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_lz4OutBuffer;          //!< Buffer for LZ4 uncompressed output
+    uint32_t m_lz4OutSize;            //!< Size in bytes of the LZ4 output data (original uncomressed data)
+    uint32_t m_nbDecodes;
+    uint32_t m_nbSuccessfulDecodes;
+    uint32_t m_nbCRCOK;
+    uint64_t m_dataCRC;
+
+};
+
+
+
+#endif /* PLUGINS_SAMPLESOURCE_SDRDAEMON_SDRDAEMONBUFFER_H_ */