mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-03 15:31:15 -05:00
371 lines
9.6 KiB
C++
371 lines
9.6 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 "sdrdaemonbufferold.h"
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#include <cassert>
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#include <cstring>
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#include <cstdlib>
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#include <iostream>
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const int SDRdaemonBufferOld::m_udpPayloadSize = 512;
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const int SDRdaemonBufferOld::m_sampleSize = 2;
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const int SDRdaemonBufferOld::m_iqSampleSize = 2 * m_sampleSize;
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SDRdaemonBufferOld::SDRdaemonBufferOld(uint32_t rateDivider) :
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m_rateDivider(rateDivider),
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m_sync(false),
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m_syncLock(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_nbLz4Decodes(0),
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m_nbLz4SuccessfulDecodes(0),
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m_nbLz4CRCOK(0),
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m_nbLastLz4SuccessfulDecodes(0),
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m_nbLastLz4CRCOK(0),
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m_dataCRC(0),
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m_sampleRateStream(0),
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m_sampleRate(0),
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m_sampleBytes(2),
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m_sampleBits(12),
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m_writeIndex(0),
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m_readChunkIndex(0),
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m_rawSize(0),
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m_rawBuffer(0),
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m_chunkSize(0),
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m_bytesInBlock(0),
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m_nbBlocks(0),
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m_readCycles(0),
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m_lastWriteIndex(0),
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m_skewRateSum(0.0),
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m_skewRate(0.0),
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m_autoFollowRate(false)
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{
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m_currentMeta.init();
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}
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SDRdaemonBufferOld::~SDRdaemonBufferOld()
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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 SDRdaemonBufferOld::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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// sync condition:
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if (m_currentMeta.m_blockSize > 0)
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{
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uint32_t nbBlocks = m_currentMeta.m_nbBytes / m_currentMeta.m_blockSize;
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m_syncLock = nbBlocks + (m_lz4 ? 2 : 1) == m_nbBlocks;
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//qDebug("SDRdaemonBuffer::readMeta: m_nbBlocks: %d:%d %s", nbBlocks, m_nbBlocks, (m_syncLock ? "locked" : "unlocked"));
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}
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else
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{
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m_syncLock = false;
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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_lz4 && !(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_udpPayloadSize) // 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 = m_iqSampleSize * metaData->m_nbSamples * metaData->m_nbBlocks;
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int sampleRate = metaData->m_sampleRate;
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if (m_autoFollowRate)
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{
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if (sampleRate != m_sampleRateStream)
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{
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m_sampleRateStream = sampleRate;
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}
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else
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{
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sampleRate = m_sampleRate;
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}
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sampleRate += sampleRate * m_skewRate;
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sampleRate = (sampleRate / m_rateDivider) * m_rateDivider;
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}
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else
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{
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m_sampleRateStream = sampleRate;
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}
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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 (sampleRate != m_sampleRate)
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{
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updateBufferSize(sampleRate);
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}
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m_sampleRate = sampleRate;
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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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return m_sync;
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}
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else
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{
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return false;
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}
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}
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void SDRdaemonBufferOld::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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writeToRawBufferUncompressed(array, length);
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}
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}
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}
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void SDRdaemonBufferOld::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_nbLz4Decodes == 100)
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{
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std::cerr << "SDRdaemonBuffer::writeAndReadLZ4:"
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<< " decoding: " << m_nbLz4CRCOK
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<< ":" << m_nbLz4SuccessfulDecodes
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<< "/" << m_nbLz4Decodes
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<< std::endl;
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m_nbLastLz4SuccessfulDecodes = m_nbLz4SuccessfulDecodes;
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m_nbLastLz4CRCOK = m_nbLz4CRCOK;
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m_nbLz4Decodes = 0;
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m_nbLz4SuccessfulDecodes = 0;
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m_nbLz4CRCOK = 0;
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}
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writeToRawBufferLZ4();
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m_lz4InCount = 0;
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}
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}
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void SDRdaemonBufferOld::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_writeIndex + length < m_rawSize)
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{
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std::memcpy((void *) &m_rawBuffer[m_writeIndex], (const void *) array, length);
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m_writeIndex += length;
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}
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else
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{
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std::memcpy((void *) &m_rawBuffer[m_writeIndex], (const void *) array, m_rawSize - m_writeIndex);
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length -= m_rawSize - m_writeIndex;
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std::memcpy((void *) m_rawBuffer, (const void *) &array[m_rawSize - m_writeIndex], length);
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m_writeIndex = length;
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}
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}
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void SDRdaemonBufferOld::writeToRawBufferLZ4()
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{
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uint64_t crc64 = m_crc64.calculate_crc(m_lz4InBuffer, m_lz4InSize);
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if (memcmp(&crc64, &m_dataCRC, 8) == 0)
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{
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m_nbLz4CRCOK++;
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}
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else
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{
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return;
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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_nbLz4Decodes++;
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if (compressedSize == m_lz4InSize)
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{
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m_nbLz4SuccessfulDecodes++;
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writeToRawBufferUncompressed((const char *) m_lz4OutBuffer, m_frameSize);
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}
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}
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uint8_t *SDRdaemonBufferOld::readDataChunk()
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{
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// relies on the fact that we always have an integer number of chunks in the raw buffer
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if (m_readChunkIndex == m_rateDivider * 2) // go back to start of raw buffer
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{
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double oneCycleSkew = 0;
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if (m_readCycles > 0)
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{
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oneCycleSkew = (double) ((int) m_writeIndex - (int) m_lastWriteIndex) / (double) m_rawSize;
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m_skewRateSum += oneCycleSkew;
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}
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//qDebug("SDRdaemonBuffer::readDataChunk: %d / %d (%lf)", m_writeIndex, m_rawSize, oneCycleSkew);
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if (!m_autoFollowRate)
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{
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m_skewRate = 0.0;
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}
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else if (m_readCycles && ((m_writeIndex < m_rawSize / 10) || (m_rawSize - m_writeIndex < m_rawSize / 10)))
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{
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m_skewRate = m_skewRateSum / m_readCycles;
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if (m_skewRate > 0.2) {
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m_skewRate = 0.2;
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} else if (m_skewRate < -0.2) {
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m_skewRate = -0.2;
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}
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qDebug("SDRdaemonBuffer::readDataChunk: m_skewRate: %lf", m_skewRate);
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}
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m_readChunkIndex = 0; // go to start
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m_lastWriteIndex = m_writeIndex;
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m_readCycles++;
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}
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uint32_t readIndex = m_readChunkIndex;
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m_readChunkIndex++;
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return &m_rawBuffer[readIndex * m_chunkSize];
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}
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void SDRdaemonBufferOld::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 SDRdaemonBufferOld::updateBufferSize(uint32_t sampleRate)
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{
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assert(sampleRate % m_rateDivider == 0); // make sure we get an integer number of samples in a chunk
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// Store 2 seconds long of samples so we have two one second long half buffers
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m_chunkSize = (sampleRate * m_iqSampleSize) / m_rateDivider;
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m_rawSize = m_chunkSize * m_rateDivider * 2;
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if (m_rawBuffer) {
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delete[] m_rawBuffer;
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}
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m_rawBuffer = new uint8_t[m_rawSize];
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m_writeIndex = 0;
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m_readChunkIndex = m_rateDivider;
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m_readCycles = 0;
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m_skewRateSum = 0;
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m_skewRate = 0;
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std::cerr << "SDRdaemonBuffer::updateBufferSize:"
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<< " sampleRate: " << sampleRate
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<< " m_chunkSize: " << m_chunkSize
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<< " m_rawSize: " << m_rawSize
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<< std::endl;
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}
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void SDRdaemonBufferOld::updateBlockCounts(uint32_t nbBytesReceived)
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{
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m_nbBlocks += m_bytesInBlock + nbBytesReceived > m_udpPayloadSize ? 1 : 0;
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m_bytesInBlock = m_bytesInBlock + nbBytesReceived > m_udpPayloadSize ? nbBytesReceived : m_bytesInBlock + nbBytesReceived;
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}
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void SDRdaemonBufferOld::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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