mirror of
https://github.com/f4exb/sdrangel.git
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216 lines
8.0 KiB
C++
216 lines
8.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 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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// (at your option) any later version. //
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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 "udpsinkfec.h"
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#include <QDebug>
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#include <boost/crc.hpp>
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#include <boost/cstdint.hpp>
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#include "util/timeutil.h"
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#include "udpsinkfecworker.h"
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UDPSinkFEC::UDPSinkFEC() :
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m_sampleRate(48000),
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m_nbSamples(0),
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m_nbBlocksFEC(0),
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m_txDelayRatio(0.0),
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m_txDelay(0),
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m_txBlockIndex(0),
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m_txBlocksIndex(0),
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m_frameCount(0),
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m_sampleIndex(0),
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m_udpWorker(0),
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m_remoteAddress("127.0.0.1"),
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m_remotePort(9090)
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{
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memset((char *) m_txBlocks, 0, 4*256*sizeof(RemoteSuperBlock));
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memset((char *) &m_superBlock, 0, sizeof(RemoteSuperBlock));
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m_currentMetaFEC.init();
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m_bufMeta = new uint8_t[m_udpSize];
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m_buf = new uint8_t[m_udpSize];
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}
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UDPSinkFEC::~UDPSinkFEC()
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{
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delete[] m_buf;
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delete[] m_bufMeta;
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}
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void UDPSinkFEC::start()
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{
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m_udpWorker = new UDPSinkFECWorker();
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m_udpWorker->setRemoteAddress(m_remoteAddress, m_remotePort);
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m_udpWorker->startStop(true);
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}
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void UDPSinkFEC::stop()
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{
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if (m_udpWorker)
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{
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m_udpWorker->startStop(false);
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m_udpWorker->deleteLater();
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m_udpWorker = 0;
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}
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}
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void UDPSinkFEC::setTxDelay(float txDelayRatio)
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{
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// delay is calculated from the fraction of the nominal UDP block process time
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// frame size: 127 * (126 or 63 samples depending on I or Q sample bytes of 2 or 4 bytes respectively)
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// divided by sample rate gives the frame process time
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// divided by the number of actual blocks including FEC blocks gives the block (i.e. UDP block) process time
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m_txDelayRatio = txDelayRatio;
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int samplesPerBlock = RemoteNbBytesPerBlock / (SDR_RX_SAMP_SZ <= 16 ? 4 : 8);
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double delay = ((127*samplesPerBlock*txDelayRatio) / m_sampleRate)/(128 + m_nbBlocksFEC);
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m_txDelay = delay * 1e6;
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qDebug() << "UDPSinkFEC::setTxDelay: txDelay: " << txDelayRatio << " m_txDelay: " << m_txDelay << " us";
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}
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void UDPSinkFEC::setNbBlocksFEC(uint32_t nbBlocksFEC)
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{
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qDebug() << "UDPSinkFEC::setNbBlocksFEC: nbBlocksFEC: " << nbBlocksFEC;
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m_nbBlocksFEC = nbBlocksFEC;
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setTxDelay(m_txDelayRatio);
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}
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void UDPSinkFEC::setSampleRate(uint32_t sampleRate)
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{
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qDebug() << "UDPSinkFEC::setSampleRate: sampleRate: " << sampleRate;
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m_sampleRate = sampleRate;
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setTxDelay(m_txDelayRatio);
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}
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void UDPSinkFEC::setRemoteAddress(const QString& address, uint16_t port)
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{
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qDebug() << "UDPSinkFEC::setRemoteAddress: address: " << address << " port: " << port;
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m_remoteAddress = address;
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m_remotePort = port;
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if (m_udpWorker) {
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m_udpWorker->setRemoteAddress(m_remoteAddress, m_remotePort);
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}
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}
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void UDPSinkFEC::write(const SampleVector::iterator& begin, uint32_t sampleChunkSize)
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{
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const SampleVector::iterator end = begin + sampleChunkSize;
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SampleVector::iterator it = begin;
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while (it != end)
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{
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int inRemainingSamples = end - it;
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if (m_txBlockIndex == 0) // Tx block index 0 is a block with only meta data
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{
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RemoteMetaDataFEC metaData;
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uint64_t ts_usecs = TimeUtil::nowus();
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metaData.m_centerFrequency = 0; // frequency not set by stream
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metaData.m_sampleRate = m_sampleRate;
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metaData.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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metaData.m_sampleBits = SDR_RX_SAMP_SZ;
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metaData.m_nbOriginalBlocks = m_nbOriginalBlocks;
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metaData.m_nbFECBlocks = m_nbBlocksFEC;
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metaData.m_tv_sec = ts_usecs / 1000000UL;
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metaData.m_tv_usec = ts_usecs % 1000000UL;
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boost::crc_32_type crc32;
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crc32.process_bytes(&metaData, sizeof(RemoteMetaDataFEC)-4);
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metaData.m_crc32 = crc32.checksum();
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memset((char *) &m_superBlock, 0, sizeof(m_superBlock));
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m_superBlock.m_header.m_frameIndex = m_frameCount;
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m_superBlock.m_header.m_blockIndex = m_txBlockIndex;
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m_superBlock.m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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m_superBlock.m_header.m_sampleBits = SDR_RX_SAMP_SZ;
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RemoteMetaDataFEC *destMeta = (RemoteMetaDataFEC *) &m_superBlock.m_protectedBlock;
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*destMeta = metaData;
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if (!(metaData == m_currentMetaFEC))
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{
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qDebug() << "UDPSinkFEC::write: meta: "
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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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<< "|" << (int) metaData.m_nbOriginalBlocks
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<< ":" << (int) metaData.m_nbFECBlocks
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<< "|" << metaData.m_tv_sec
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<< ":" << metaData.m_tv_usec
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<< "|";
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m_currentMetaFEC = metaData;
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}
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m_txBlocks[m_txBlocksIndex][0] = m_superBlock;
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m_txBlockIndex = 1; // next Tx block with data
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}
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int samplesPerBlock = RemoteNbBytesPerBlock / (SDR_RX_SAMP_SZ <= 16 ? 4 : 8); // two I or Q samples
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if (m_sampleIndex + inRemainingSamples < samplesPerBlock) // there is still room in the current super block
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{
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memcpy((char *) &m_superBlock.m_protectedBlock.buf[m_sampleIndex*sizeof(Sample)],
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(const char *) &(*it),
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inRemainingSamples * sizeof(Sample));
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m_sampleIndex += inRemainingSamples;
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it = end; // all input samples are consumed
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}
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else // complete super block and initiate the next if not end of frame
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{
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memcpy((char *) &m_superBlock.m_protectedBlock.buf[m_sampleIndex*sizeof(Sample)],
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(const char *) &(*it),
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(samplesPerBlock - m_sampleIndex) * sizeof(Sample));
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it += samplesPerBlock - m_sampleIndex;
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m_sampleIndex = 0;
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m_superBlock.m_header.m_frameIndex = m_frameCount;
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m_superBlock.m_header.m_blockIndex = m_txBlockIndex;
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m_superBlock.m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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m_superBlock.m_header.m_sampleBits = SDR_RX_SAMP_SZ;
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m_txBlocks[m_txBlocksIndex][m_txBlockIndex] = m_superBlock;
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if (m_txBlockIndex == m_nbOriginalBlocks - 1) // frame complete
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{
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int nbBlocksFEC = m_nbBlocksFEC;
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int txDelay = m_txDelay;
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if (m_udpWorker) {
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m_udpWorker->pushTxFrame(m_txBlocks[m_txBlocksIndex], nbBlocksFEC, txDelay, m_frameCount);
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}
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m_txBlocksIndex = (m_txBlocksIndex + 1) % 4;
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m_txBlockIndex = 0;
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m_frameCount++;
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}
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else
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{
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m_txBlockIndex++;
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}
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}
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}
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}
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