mirror of
https://github.com/f4exb/sdrangel.git
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466 lines
20 KiB
C++
466 lines
20 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 <QDebug>
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#include <cassert>
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#include <cstring>
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#include <cmath>
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#include <lz4.h>
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#include "sdrdaemonfecbuffer.h"
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const int SDRdaemonFECBuffer::m_sampleSize = 2;
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const int SDRdaemonFECBuffer::m_iqSampleSize = 2 * m_sampleSize;
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SDRdaemonFECBuffer::SDRdaemonFECBuffer(uint32_t throttlems) :
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m_frameHead(0),
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m_decoderIndexHead(nbDecoderSlots/2),
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m_curNbBlocks(0),
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m_curNbRecovery(0),
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m_throttlemsNominal(throttlems),
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m_readIndex(0),
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m_readBuffer(0),
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m_readSize(0),
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m_bufferLenSec(0.0f)
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{
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m_currentMeta.init();
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m_outputMeta.init();
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m_framesNbBytes = nbDecoderSlots * sizeof(BufferFrame);
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m_wrDeltaEstimate = m_framesNbBytes / 2;
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m_paramsCM256.BlockBytes = sizeof(ProtectedBlock); // never changes
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m_paramsCM256.OriginalCount = m_nbOriginalBlocks; // never changes
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}
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SDRdaemonFECBuffer::~SDRdaemonFECBuffer()
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{
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if (m_readBuffer) {
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delete[] m_readBuffer;
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}
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}
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void SDRdaemonFECBuffer::initDecoderSlotsAddresses()
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{
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for (int i = 0; i < nbDecoderSlots; i++)
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{
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for (int j = 0; j < m_nbOriginalBlocks - 1; j++)
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{
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m_decoderSlots[i].m_originalBlockPtrs[j] = &m_frames[i].m_blocks[j];
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}
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}
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}
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void SDRdaemonFECBuffer::initDecodeAllSlots()
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{
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for (int i = 0; i < nbDecoderSlots; i++)
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{
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m_decoderSlots[i].m_blockCount = 0;
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m_decoderSlots[i].m_recoveryCount = 0;
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m_decoderSlots[i].m_decoded = false;
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m_decoderSlots[i].m_metaRetrieved = false;
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m_decoderSlots[i].m_blockZero.m_metaData.init();
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}
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}
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void SDRdaemonFECBuffer::initReadIndex()
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{
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m_readIndex = ((m_decoderIndexHead + (nbDecoderSlots/2)) % nbDecoderSlots) * sizeof(BufferFrame);
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m_wrDeltaEstimate = m_framesNbBytes / 2;
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}
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void SDRdaemonFECBuffer::checkSlotData(int slotIndex)
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{
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if (!m_decoderSlots[slotIndex].m_decoded)
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{
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qDebug() << "SDRdaemonFECBuffer::checkSlotData: incomplete frame:"
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<< " m_blockCount: " << m_decoderSlots[slotIndex].m_blockCount
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<< " m_recoveryCount: " << m_decoderSlots[slotIndex].m_recoveryCount;
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}
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if (m_decoderSlots[slotIndex].m_metaRetrieved) // meta data has been retrieved (direct or recovery)
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{
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if (!(m_decoderSlots[slotIndex].m_blockZero.m_metaData == m_currentMeta))
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{
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int sampleRate = m_decoderSlots[slotIndex].m_blockZero.m_metaData.m_sampleRate;
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if (sampleRate > 0) {
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m_bufferLenSec = (float) m_framesNbBytes / (float) sampleRate;
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}
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printMeta("SDRdaemonFECBuffer::checkSlotData: new meta", &m_decoderSlots[slotIndex].m_blockZero.m_metaData); // print for change other than timestamp
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}
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m_currentMeta = m_decoderSlots[slotIndex].m_blockZero.m_metaData; // renew current meta
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}
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}
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void SDRdaemonFECBuffer::initDecodeSlot(int slotIndex)
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{
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int pseudoWriteIndex = slotIndex * sizeof(BufferFrame);
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m_wrDeltaEstimate = pseudoWriteIndex - m_readIndex;
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if (m_decoderSlots[slotIndex].m_metaRetrieved) { // meta data was retrieved in the current slot
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m_outputMeta = m_decoderSlots[slotIndex].m_blockZero.m_metaData;
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} else {
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m_outputMeta = m_currentMeta; // use stored current meta
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}
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// collect stats before voiding the slot
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m_curNbBlocks = m_decoderSlots[slotIndex].m_blockCount;
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m_curNbRecovery = m_decoderSlots[slotIndex].m_recoveryCount;
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m_avgNbBlocks(m_curNbBlocks);
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m_avgNbRecovery(m_curNbRecovery);
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// void the slot
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m_decoderSlots[slotIndex].m_blockCount = 0;
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m_decoderSlots[slotIndex].m_recoveryCount = 0;
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m_decoderSlots[slotIndex].m_decoded = false;
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m_decoderSlots[slotIndex].m_metaRetrieved = false;
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m_decoderSlots[slotIndex].m_blockZero.m_metaData.init();
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memset((void *) m_frames[slotIndex].m_blocks, 0, (m_nbOriginalBlocks - 1) * sizeof(ProtectedBlock));
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memset((void *) m_decoderSlots[slotIndex].m_recoveryBlocks, 1, m_nbOriginalBlocks * sizeof(ProtectedBlock));
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}
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void SDRdaemonFECBuffer::writeData(char *array, uint32_t length)
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{
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assert(length == m_udpPayloadSize);
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SuperBlock *superBlock = (SuperBlock *) array;
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int frameIndex = superBlock->header.frameIndex;
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int decoderIndex = frameIndex % nbDecoderSlots;
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if (m_frameHead == -1) // initial state
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{
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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initReadIndex(); // reset read index
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initDecodeAllSlots(); // initialize all slots
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}
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else if (m_frameHead != frameIndex) // frame break => new frame starts
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{
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex; // new frame head
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checkSlotData(decoderIndex); // check slot before re-init
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initDecodeSlot(decoderIndex); // collect stats and re-initialize current slot
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}
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int blockCount = m_decoderSlots[decoderIndex].m_blockCount;
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int recoveryCount = m_decoderSlots[decoderIndex].m_recoveryCount;
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int nbOriginalBlocks = 0;
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if (blockCount < m_nbOriginalBlocks) // not enough blocks to decode -> store data
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{
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int blockIndex = superBlock->header.blockIndex;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockCount].Index = blockIndex;
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if (blockIndex == 0) // first block with meta
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData(0): frameIndex: " << frameIndex << " blockIndex: " << blockIndex;
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ProtectedBlockZero *blockZero = (ProtectedBlockZero *) &superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_blockZero = *blockZero;
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m_decoderSlots[decoderIndex].m_metaRetrieved = true;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockCount].Block = (void *) &m_decoderSlots[decoderIndex].m_blockZero;
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}
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else if (blockIndex < m_nbOriginalBlocks) // original data
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData(<128): frameIndex: " << frameIndex << " blockIndex: " << blockIndex;
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m_frames[decoderIndex].m_blocks[blockIndex - 1] = superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockCount].Block = (void *) &m_frames[decoderIndex].m_blocks[blockIndex - 1];
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}
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else // recovery data
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{
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qDebug() << "SDRdaemonFECBuffer::writeData(>=128): frameIndex: " << frameIndex << " blockIndex: " << blockIndex;
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if (recoveryCount == 0)
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{
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nbOriginalBlocks = blockCount;
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}
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m_decoderSlots[decoderIndex].m_recoveryBlocks[recoveryCount] = superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockCount].Block = (void *) &m_decoderSlots[decoderIndex].m_recoveryBlocks[recoveryCount];
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m_decoderSlots[decoderIndex].m_recoveryCount++;
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}
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}
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else if (!m_decoderSlots[decoderIndex].m_decoded) // ready to decode and not decoded yet
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{
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if (m_decoderSlots[decoderIndex].m_recoveryCount > 0) // recovery data used => need to decode FEC
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{
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if (m_decoderSlots[decoderIndex].m_metaRetrieved) // block zero with its meta data has been received
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{
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m_paramsCM256.RecoveryCount = m_decoderSlots[decoderIndex].m_blockZero.m_metaData.m_nbFECBlocks;
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}
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else
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{
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m_paramsCM256.RecoveryCount = m_currentMeta.m_nbFECBlocks; // take last stored value for number of FEC blocks
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}
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if (cm256_decode(m_paramsCM256, m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks)) // failure to decode
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{
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qDebug() << "SDRdaemonFECBuffer::writeData: CM256 decode error:"
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<< " BlockBytes: " << m_paramsCM256.BlockBytes
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<< " OriginalCount: " << m_paramsCM256.OriginalCount
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<< " RecoveryCount: " << m_paramsCM256.RecoveryCount
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<< " m_recoveryCount: " << m_decoderSlots[decoderIndex].m_recoveryCount;
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}
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else // success to decode
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{
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qDebug() << "SDRdaemonFECBuffer::writeData: CM256 decode success:"
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<< " nbOriginalBlocks: " << nbOriginalBlocks
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<< " m_recoveryCount: " << m_decoderSlots[decoderIndex].m_recoveryCount;
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for (int ir = 0; ir < m_decoderSlots[decoderIndex].m_recoveryCount; ir++) // recover lost blocks
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{
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int blockIndex = m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[nbOriginalBlocks+ir].Index;
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if (blockIndex > 0) // ignore meta data for now
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{
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m_frames[decoderIndex].m_blocks[blockIndex - 1] = m_decoderSlots[decoderIndex].m_recoveryBlocks[ir];
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}
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qDebug() << "SDRdaemonFECBuffer::writeData:"
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<< " recovered block #" << blockIndex
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<< " i[0]: " << m_decoderSlots[decoderIndex].m_recoveryBlocks[ir].samples[0].i
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<< " q[0]: " << m_decoderSlots[decoderIndex].m_recoveryBlocks[ir].samples[0].q;
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}
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}
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}
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m_decoderSlots[decoderIndex].m_decoded = true;
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}
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m_decoderSlots[decoderIndex].m_blockCount++;
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}
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void SDRdaemonFECBuffer::writeData0(char *array, uint32_t length)
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{
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assert(length == m_udpPayloadSize);
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bool dataAvailable = false;
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SuperBlock *superBlock = (SuperBlock *) array;
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int frameIndex = superBlock->header.frameIndex;
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int decoderIndex = frameIndex % nbDecoderSlots;
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int blockIndex = superBlock->header.blockIndex;
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// qDebug() << "SDRdaemonFECBuffer::writeData:"
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// << " frameIndex: " << frameIndex
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// << " decoderIndex: " << decoderIndex
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// << " blockIndex: " << blockIndex;
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if (m_frameHead == -1) // initial state
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{
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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initReadIndex(); // reset read index
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initDecodeAllSlots(); // initialize all slots
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}
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else
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{
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int frameDelta = m_frameHead - frameIndex;
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if (frameDelta < 0)
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{
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if (-frameDelta < nbDecoderSlots) // new frame head not too new
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData: new frame head (1): " << frameIndex << ":" << frameDelta << ":" << decoderIndex;
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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checkSlotData(decoderIndex);
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dataAvailable = true;
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initDecodeSlot(decoderIndex); // collect stats and re-initialize current slot
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}
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else if (-frameDelta <= 65536 - nbDecoderSlots) // loss of sync start over
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData: loss of sync start over (1)" << frameIndex << ":" << frameDelta << ":" << decoderIndex;
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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initReadIndex(); // reset read index
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initDecodeAllSlots(); // re-initialize all slots
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}
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}
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else
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{
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if (frameDelta > 65536 - nbDecoderSlots) // new frame head not too new
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData: new frame head (2): " << frameIndex << ":" << frameDelta << ":" << decoderIndex;
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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checkSlotData(decoderIndex);
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dataAvailable = true;
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initDecodeSlot(decoderIndex); // collect stats and re-initialize current slot
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}
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else if (frameDelta >= nbDecoderSlots) // loss of sync start over
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{
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//qDebug() << "SDRdaemonFECBuffer::writeData: loss of sync start over (2)" << frameIndex << ":" << frameDelta << ":" << decoderIndex;
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m_decoderIndexHead = decoderIndex; // new decoder slot head
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m_frameHead = frameIndex;
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initReadIndex(); // reset read index
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initDecodeAllSlots(); // re-initialize all slots
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}
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}
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}
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// decoderIndex should now be correctly set
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int blockHead = m_decoderSlots[decoderIndex].m_blockCount;
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int recoveryHead = m_decoderSlots[decoderIndex].m_recoveryCount;
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if (blockHead < m_nbOriginalBlocks) // not enough blocks to decode -> store data
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{
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if (blockIndex == 0) // first block with meta
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{
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ProtectedBlockZero *blockZero = (ProtectedBlockZero *) &superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_blockZero = *blockZero;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockHead].Block = (void *) &m_decoderSlots[decoderIndex].m_blockZero;
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m_decoderSlots[decoderIndex].m_metaRetrieved = true;
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}
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else if (blockIndex < m_nbOriginalBlocks) // normal block
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{
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m_frames[decoderIndex].m_blocks[blockIndex - 1] = superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockHead].Block = (void *) &m_frames[decoderIndex].m_blocks[blockIndex - 1];
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}
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else // redundancy block
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{
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m_decoderSlots[decoderIndex].m_recoveryBlocks[recoveryHead] = superBlock->protectedBlock;
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockHead].Block = (void *) &m_decoderSlots[decoderIndex].m_recoveryBlocks[recoveryHead];
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m_decoderSlots[decoderIndex].m_recoveryCount++;
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}
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m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[blockHead].Index = blockIndex;
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m_decoderSlots[decoderIndex].m_blockCount++;
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}
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else if (!m_decoderSlots[decoderIndex].m_decoded) // ready to decode
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{
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if (m_decoderSlots[decoderIndex].m_recoveryCount > 0) // recovery data used
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{
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if (m_decoderSlots[decoderIndex].m_metaRetrieved) // block zero with its meta data has been received
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{
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m_paramsCM256.RecoveryCount = m_decoderSlots[decoderIndex].m_blockZero.m_metaData.m_nbFECBlocks;
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}
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else
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{
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m_paramsCM256.RecoveryCount = m_currentMeta.m_nbFECBlocks; // take last stored value for number of FEC blocks
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}
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if (cm256_decode(m_paramsCM256, m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks)) // failure to decode
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{
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qDebug() << "SDRdaemonFECBuffer::writeData: CM256 decode error:"
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<< " BlockBytes: " << m_paramsCM256.BlockBytes
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<< " OriginalCount: " << m_paramsCM256.OriginalCount
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<< " RecoveryCount: " << m_paramsCM256.RecoveryCount
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<< " m_recoveryCount: " << m_decoderSlots[decoderIndex].m_recoveryCount;
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}
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else // success to decode
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{
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int nbOriginalBlocks = m_decoderSlots[decoderIndex].m_blockCount - m_decoderSlots[decoderIndex].m_recoveryCount;
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qDebug() << "SDRdaemonFECBuffer::writeData: CM256 decode success:"
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<< " nbOriginalBlocks: " << nbOriginalBlocks
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<< " m_recoveryCount: " << m_decoderSlots[decoderIndex].m_recoveryCount;
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for (int ir = 0; ir < m_decoderSlots[decoderIndex].m_recoveryCount; ir++) // recover lost blocks
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{
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int blockIndex = m_decoderSlots[decoderIndex].m_cm256DescriptorBlocks[nbOriginalBlocks+ir].Index;
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if (blockIndex == 0)
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{
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ProtectedBlockZero *recoveredBlockZero = (ProtectedBlockZero *) &m_decoderSlots[decoderIndex].m_recoveryBlocks[ir];
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printMeta("SDRdaemonFECBuffer::writeData: recovered meta", &recoveredBlockZero->m_metaData);
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// FEC does not work
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// m_decoderSlots[decoderIndex].m_blockZero.m_metaData = recoveredBlockZero->m_metaData;
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// m_decoderSlots[decoderIndex].m_metaRetrieved = true;
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}
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else
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{
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m_frames[decoderIndex].m_blocks[blockIndex - 1] = m_decoderSlots[decoderIndex].m_recoveryBlocks[ir];
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}
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qDebug() << "SDRdaemonFECBuffer::writeData:"
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<< " recovered block #" << blockIndex
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<< " i[0]: " << m_decoderSlots[decoderIndex].m_recoveryBlocks[ir].samples[0].i
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<< " q[0]: " << m_decoderSlots[decoderIndex].m_recoveryBlocks[ir].samples[0].q;
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}
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}
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}
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//printMeta("SDRdaemonFECBuffer::writeData", &m_decoderSlots[decoderIndex].m_blockZero.m_metaData);
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if (m_decoderSlots[decoderIndex].m_metaRetrieved) // meta data has been retrieved (direct or recovery)
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{
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if (!(m_decoderSlots[decoderIndex].m_blockZero.m_metaData == m_currentMeta))
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{
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int sampleRate = m_decoderSlots[decoderIndex].m_blockZero.m_metaData.m_sampleRate;
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if (sampleRate > 0) {
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m_bufferLenSec = (float) m_framesNbBytes / (float) sampleRate;
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}
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printMeta("SDRdaemonFECBuffer::writeData: new meta", &m_decoderSlots[decoderIndex].m_blockZero.m_metaData); // print for change other than timestamp
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}
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m_currentMeta = m_decoderSlots[decoderIndex].m_blockZero.m_metaData; // renew current meta
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}
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m_decoderSlots[decoderIndex].m_decoded = true;
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}
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}
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uint8_t *SDRdaemonFECBuffer::readData(int32_t length)
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{
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uint8_t *buffer = (uint8_t *) m_frames;
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uint32_t readIndex = m_readIndex;
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if (m_readIndex + length < m_framesNbBytes) // ends before buffer bound
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{
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m_readIndex += length;
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return &buffer[readIndex];
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}
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else if (m_readIndex + length == m_framesNbBytes) // ends at buffer bound
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{
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m_readIndex = 0;
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return &buffer[readIndex];
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}
|
|
else // ends after buffer bound
|
|
{
|
|
if (length > m_readSize) // reallocate composition buffer if necessary
|
|
{
|
|
if (m_readBuffer) {
|
|
delete[] m_readBuffer;
|
|
}
|
|
|
|
m_readBuffer = new uint8_t[length];
|
|
m_readSize = length;
|
|
}
|
|
|
|
std::memcpy((void *) m_readBuffer, (const void *) &buffer[m_readIndex], m_framesNbBytes - m_readIndex); // copy end of buffer
|
|
length -= m_framesNbBytes - m_readIndex;
|
|
std::memcpy((void *) &m_readBuffer[m_framesNbBytes - m_readIndex], (const void *) buffer, length); // copy start of buffer
|
|
m_readIndex = length;
|
|
return m_readBuffer;
|
|
}
|
|
}
|
|
|
|
void SDRdaemonFECBuffer::printMeta(const QString& header, MetaDataFEC *metaData)
|
|
{
|
|
qDebug() << header << ": "
|
|
<< "|" << metaData->m_centerFrequency
|
|
<< ":" << metaData->m_sampleRate
|
|
<< ":" << (int) (metaData->m_sampleBytes & 0xF)
|
|
<< ":" << (int) metaData->m_sampleBits
|
|
<< ":" << (int) metaData->m_nbOriginalBlocks
|
|
<< ":" << (int) metaData->m_nbFECBlocks
|
|
<< "|" << metaData->m_tv_sec
|
|
<< ":" << metaData->m_tv_usec
|
|
<< "|";
|
|
}
|