mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-09-16 01:56:32 -04:00
286 lines
7.5 KiB
C++
286 lines
7.5 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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#include <cassert>
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#include <cstring>
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#include <iostream>
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#include "sdrdaemonbuffer.h"
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SDRdaemonBuffer::SDRdaemonBuffer(uint32_t blockSize) :
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m_blockSize(blockSize),
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m_sync(false),
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m_lz4(false),
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m_inCount(0),
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m_lz4InBuffer(0),
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m_lz4InCount(0),
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m_lz4InSize(0),
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m_lz4OutBuffer(0),
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m_frameSize(0),
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m_nbDecodes(0),
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m_nbSuccessfulDecodes(0),
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m_nbCRCOK(0),
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m_dataCRC(0),
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m_sampleRate(1000000),
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m_sampleBytes(2),
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m_sampleBits(12),
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m_rawCount(0),
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m_readCount(0),
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m_rawSize(0),
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m_rawBuffer(0),
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m_bytesInBlock(0),
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m_nbBlocks(0)
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{
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m_currentMeta.init();
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}
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SDRdaemonBuffer::~SDRdaemonBuffer()
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{
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if (m_rawBuffer) {
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delete[] m_rawBuffer;
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}
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if (m_lz4InBuffer) {
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delete[] m_lz4InBuffer;
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}
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if (m_lz4OutBuffer) {
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delete[] m_lz4OutBuffer;
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}
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}
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bool SDRdaemonBuffer::readMeta(char *array, uint32_t length)
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{
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assert(length >= sizeof(MetaData) + 8);
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MetaData *metaData = (MetaData *) array;
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if (m_crc64.calculate_crc((uint8_t *)array, sizeof(MetaData) - 8) == metaData->m_crc)
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{
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memcpy((void *) &m_dataCRC, (const void *) &array[sizeof(MetaData)], 8);
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m_nbBlocks = 0;
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m_inCount = 0;
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if (!(m_currentMeta == *metaData))
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{
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std::cerr << "SDRdaemonBuffer::readMeta: ";
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printMeta(metaData);
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}
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m_currentMeta = *metaData;
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// sanity checks
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if (metaData->m_blockSize == m_blockSize) // sent blocksize matches given blocksize
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{
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m_sampleBytes = metaData->m_sampleBytes & 0x0F;
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uint32_t frameSize = 2 * 2 * metaData->m_nbSamples * metaData->m_nbBlocks;
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if (metaData->m_sampleBytes & 0x10)
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{
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m_lz4 = true;
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m_lz4InSize = metaData->m_nbBytes; // compressed input size
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m_lz4InCount = 0;
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if (frameSize != m_frameSize)
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{
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updateLZ4Sizes(frameSize);
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}
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}
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else
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{
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m_lz4 = false;
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}
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if (frameSize != m_frameSize)
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{
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updateBufferSize(frameSize);
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}
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m_frameSize = frameSize;
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m_sync = true;
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}
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else
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{
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m_sync = false;
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}
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}
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return m_sync;
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}
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void SDRdaemonBuffer::writeData(char *array, uint32_t length)
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{
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if ((m_sync) && (m_nbBlocks > 0))
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{
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if (m_lz4)
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{
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writeDataLZ4(array, length);
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}
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else
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{
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writeDataUncompressed(array, length);
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}
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}
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}
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void SDRdaemonBuffer::writeDataUncompressed(const char *array, uint32_t length)
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{
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if (m_inCount + length < m_frameSize)
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{
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std::memcpy((void *) &m_rawBuffer[m_rawCount], (const void *) array, length);
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m_inCount += length;
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}
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else if (m_inCount < m_frameSize)
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{
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std::memcpy((void *) &m_rawBuffer[m_rawCount], (const void *) array, m_frameSize - m_inCount); // copy rest of data in compressed Buffer
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m_inCount += m_frameSize - m_inCount;
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}
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}
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void SDRdaemonBuffer::writeDataLZ4(const char *array, uint32_t length)
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{
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if (m_lz4InCount + length < m_lz4InSize)
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{
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std::memcpy((void *) &m_lz4InBuffer[m_lz4InCount], (const void *) array, length);
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m_lz4InCount += length;
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}
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else
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{
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std::memcpy((void *) &m_lz4InBuffer[m_lz4InCount], (const void *) array, m_lz4InSize - m_lz4InCount); // copy rest of data in compressed Buffer
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m_lz4InCount += length;
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}
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if (m_lz4InCount >= m_lz4InSize) // full input compressed block retrieved
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{
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if (m_nbDecodes == 100)
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{
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std::cerr << "SDRdaemonBuffer::writeAndReadLZ4:"
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<< " decoding: " << m_nbCRCOK
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<< ":" << m_nbSuccessfulDecodes
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<< "/" << m_nbDecodes
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<< std::endl;
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m_nbDecodes = 0;
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m_nbSuccessfulDecodes = 0;
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m_nbCRCOK = 0;
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}
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uint64_t crc64 = m_crc64.calculate_crc(m_lz4InBuffer, m_lz4InSize);
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//uint64_t crc64 = 0x0123456789ABCDEF;
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if (memcmp(&crc64, &m_dataCRC, 8) == 0)
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{
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m_nbCRCOK++;
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}
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int compressedSize = LZ4_decompress_fast((const char*) m_lz4InBuffer, (char*) &m_rawBuffer[m_rawCount], m_frameSize);
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m_nbDecodes++;
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if (compressedSize == m_lz4InSize)
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{
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m_nbSuccessfulDecodes++;
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}
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writeToRawBufferLZ4((const char *) m_lz4InBuffer, m_frameSize);
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m_lz4InCount = 0;
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}
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}
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void SDRdaemonBuffer::writeToRawBufferUncompressed(const char *array, uint32_t length)
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{
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// TODO: handle the 1 byte per I or Q sample
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if (m_rawCount + length < m_rawSize)
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{
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std::memcpy((void *) &m_rawBuffer[m_rawCount], (const void *) array, length);
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m_rawCount += length;
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}
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else
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{
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std::memcpy((void *) &m_rawBuffer[m_rawCount], (const void *) array, m_rawSize - m_rawCount);
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m_rawCount = length - (m_rawSize - m_rawCount);
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std::memcpy((void *) m_rawBuffer, (const void *) array, m_rawCount);
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}
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}
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void SDRdaemonBuffer::writeToRawBufferLZ4(const char *array, uint32_t length)
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{
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int compressedSize = LZ4_decompress_fast((const char*) m_lz4InBuffer, (char*) m_lz4OutBuffer, m_frameSize);
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m_nbDecodes++;
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if (compressedSize == m_lz4InSize)
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{
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m_nbSuccessfulDecodes++;
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}
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writeToRawBufferUncompressed((const char *) m_lz4OutBuffer, m_frameSize);
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}
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void SDRdaemonBuffer::updateLZ4Sizes(uint32_t frameSize)
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{
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uint32_t maxInputSize = LZ4_compressBound(frameSize);
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if (m_lz4InBuffer) {
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delete[] m_lz4InBuffer;
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}
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m_lz4InBuffer = new uint8_t[maxInputSize];
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if (m_lz4OutBuffer) {
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delete[] m_lz4OutBuffer;
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}
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m_lz4OutBuffer = new uint8_t[frameSize];
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}
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void SDRdaemonBuffer::updateBufferSize(uint32_t frameSize)
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{
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uint32_t nbFrames = ((m_sampleRate * 2 * 2) / frameSize) + 1; // store at least 1 second of samples
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std::cerr << "SDRdaemonBuffer::updateBufferSize:"
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<< " frameSize: " << frameSize
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<< " nbFrames: " << nbFrames
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<< std::endl;
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if (m_rawBuffer) {
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delete[] m_rawBuffer;
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}
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m_rawSize = nbFrames * frameSize;
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m_rawBuffer = new uint8_t[m_rawSize];
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}
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void SDRdaemonBuffer::updateBlockCounts(uint32_t nbBytesReceived)
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{
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m_nbBlocks += m_bytesInBlock + nbBytesReceived > m_blockSize ? 1 : 0;
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m_bytesInBlock = m_bytesInBlock + nbBytesReceived > m_blockSize ? nbBytesReceived : m_bytesInBlock + nbBytesReceived;
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}
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void SDRdaemonBuffer::printMeta(MetaData *metaData)
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{
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std::cerr
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<< "|" << metaData->m_centerFrequency
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<< ":" << metaData->m_sampleRate
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<< ":" << (int) (metaData->m_sampleBytes & 0xF)
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<< ":" << (int) metaData->m_sampleBits
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<< ":" << metaData->m_blockSize
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<< ":" << metaData->m_nbSamples
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<< "||" << metaData->m_nbBlocks
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<< ":" << metaData->m_nbBytes
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<< "|" << metaData->m_tv_sec
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<< ":" << metaData->m_tv_usec
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<< std::endl;
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}
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