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sdrangel/plugins/samplesource/sdrdaemon/sdrdaemonbufferold.cpp

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 Edouard Griffiths, F4EXB //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "sdrdaemonbufferold.h"
#include <cassert>
#include <cstring>
#include <cstdlib>
#include <iostream>
const int SDRdaemonBufferOld::m_udpPayloadSize = 512;
const int SDRdaemonBufferOld::m_sampleSize = 2;
const int SDRdaemonBufferOld::m_iqSampleSize = 2 * m_sampleSize;
SDRdaemonBufferOld::SDRdaemonBufferOld(uint32_t rateDivider) :
m_rateDivider(rateDivider),
m_sync(false),
m_syncLock(false),
m_lz4(false),
m_inCount(0),
m_lz4InBuffer(0),
m_lz4InCount(0),
m_lz4InSize(0),
m_lz4OutBuffer(0),
m_frameSize(0),
m_nbLz4Decodes(0),
m_nbLz4SuccessfulDecodes(0),
m_nbLz4CRCOK(0),
m_nbLastLz4SuccessfulDecodes(0),
m_nbLastLz4CRCOK(0),
m_dataCRC(0),
m_sampleRateStream(0),
m_sampleRate(0),
m_sampleBytes(2),
m_sampleBits(12),
m_writeIndex(0),
m_readChunkIndex(0),
m_rawSize(0),
m_rawBuffer(0),
m_chunkSize(0),
m_bytesInBlock(0),
m_nbBlocks(0),
m_readCycles(0),
m_lastWriteIndex(0),
m_skewRateSum(0.0),
m_skewRate(0.0),
m_autoFollowRate(false)
{
m_currentMeta.init();
}
SDRdaemonBufferOld::~SDRdaemonBufferOld()
{
if (m_rawBuffer) {
delete[] m_rawBuffer;
}
if (m_lz4InBuffer) {
delete[] m_lz4InBuffer;
}
if (m_lz4OutBuffer) {
delete[] m_lz4OutBuffer;
}
}
bool SDRdaemonBufferOld::readMeta(char *array, uint32_t length)
{
assert(length >= sizeof(MetaData) + 8);
MetaData *metaData = (MetaData *) array;
if (m_crc64.calculate_crc((uint8_t *)array, sizeof(MetaData) - 8) == metaData->m_crc)
{
// sync condition:
if (m_currentMeta.m_blockSize > 0)
{
uint32_t nbBlocks = m_currentMeta.m_nbBytes / m_currentMeta.m_blockSize;
m_syncLock = nbBlocks + (m_lz4 ? 2 : 1) == m_nbBlocks;
//qDebug("SDRdaemonBuffer::readMeta: m_nbBlocks: %d:%d %s", nbBlocks, m_nbBlocks, (m_syncLock ? "locked" : "unlocked"));
}
else
{
m_syncLock = false;
}
memcpy((void *) &m_dataCRC, (const void *) &array[sizeof(MetaData)], 8);
m_nbBlocks = 0;
m_inCount = 0;
if (!m_lz4 && !(m_currentMeta == *metaData))
{
std::cerr << "SDRdaemonBuffer::readMeta: ";
printMeta(metaData);
}
m_currentMeta = *metaData;
// sanity checks
if (metaData->m_blockSize == m_udpPayloadSize) // sent blocksize matches given blocksize
{
m_sampleBytes = metaData->m_sampleBytes & 0x0F;
uint32_t frameSize = m_iqSampleSize * metaData->m_nbSamples * metaData->m_nbBlocks;
int sampleRate = metaData->m_sampleRate;
if (m_autoFollowRate)
{
if (sampleRate != m_sampleRateStream)
{
m_sampleRateStream = sampleRate;
}
else
{
sampleRate = m_sampleRate;
}
sampleRate += sampleRate * m_skewRate;
sampleRate = (sampleRate / m_rateDivider) * m_rateDivider;
}
else
{
m_sampleRateStream = sampleRate;
}
if (metaData->m_sampleBytes & 0x10)
{
m_lz4 = true;
m_lz4InSize = metaData->m_nbBytes; // compressed input size
m_lz4InCount = 0;
if (frameSize != m_frameSize)
{
updateLZ4Sizes(frameSize);
}
}
else
{
m_lz4 = false;
}
if (sampleRate != m_sampleRate)
{
updateBufferSize(sampleRate);
}
m_sampleRate = sampleRate;
m_frameSize = frameSize;
m_sync = true;
}
else
{
m_sync = false;
}
return m_sync;
}
else
{
return false;
}
}
void SDRdaemonBufferOld::writeData(char *array, uint32_t length)
{
if ((m_sync) && (m_nbBlocks > 0))
{
if (m_lz4)
{
writeDataLZ4(array, length);
}
else
{
writeToRawBufferUncompressed(array, length);
}
}
}
void SDRdaemonBufferOld::writeDataLZ4(const char *array, uint32_t length)
{
if (m_lz4InCount + length < m_lz4InSize)
{
std::memcpy((void *) &m_lz4InBuffer[m_lz4InCount], (const void *) array, length);
m_lz4InCount += length;
}
else
{
std::memcpy((void *) &m_lz4InBuffer[m_lz4InCount], (const void *) array, m_lz4InSize - m_lz4InCount); // copy rest of data in compressed Buffer
m_lz4InCount += length;
}
if (m_lz4InCount >= m_lz4InSize) // full input compressed block retrieved
{
if (m_nbLz4Decodes == 100)
{
std::cerr << "SDRdaemonBuffer::writeAndReadLZ4:"
<< " decoding: " << m_nbLz4CRCOK
<< ":" << m_nbLz4SuccessfulDecodes
<< "/" << m_nbLz4Decodes
<< std::endl;
m_nbLastLz4SuccessfulDecodes = m_nbLz4SuccessfulDecodes;
m_nbLastLz4CRCOK = m_nbLz4CRCOK;
m_nbLz4Decodes = 0;
m_nbLz4SuccessfulDecodes = 0;
m_nbLz4CRCOK = 0;
}
writeToRawBufferLZ4();
m_lz4InCount = 0;
}
}
void SDRdaemonBufferOld::writeToRawBufferUncompressed(const char *array, uint32_t length)
{
// TODO: handle the 1 byte per I or Q sample
if (m_writeIndex + length < m_rawSize)
{
std::memcpy((void *) &m_rawBuffer[m_writeIndex], (const void *) array, length);
m_writeIndex += length;
}
else
{
std::memcpy((void *) &m_rawBuffer[m_writeIndex], (const void *) array, m_rawSize - m_writeIndex);
length -= m_rawSize - m_writeIndex;
std::memcpy((void *) m_rawBuffer, (const void *) &array[m_rawSize - m_writeIndex], length);
m_writeIndex = length;
}
}
void SDRdaemonBufferOld::writeToRawBufferLZ4()
{
uint64_t crc64 = m_crc64.calculate_crc(m_lz4InBuffer, m_lz4InSize);
if (memcmp(&crc64, &m_dataCRC, 8) == 0)
{
m_nbLz4CRCOK++;
}
else
{
return;
}
int compressedSize = LZ4_decompress_fast((const char*) m_lz4InBuffer, (char*) m_lz4OutBuffer, m_frameSize);
m_nbLz4Decodes++;
if (compressedSize == m_lz4InSize)
{
m_nbLz4SuccessfulDecodes++;
writeToRawBufferUncompressed((const char *) m_lz4OutBuffer, m_frameSize);
}
}
uint8_t *SDRdaemonBufferOld::readDataChunk()
{
// relies on the fact that we always have an integer number of chunks in the raw buffer
if (m_readChunkIndex == m_rateDivider * 2) // go back to start of raw buffer
{
double oneCycleSkew = 0;
if (m_readCycles > 0)
{
oneCycleSkew = (double) ((int) m_writeIndex - (int) m_lastWriteIndex) / (double) m_rawSize;
m_skewRateSum += oneCycleSkew;
}
//qDebug("SDRdaemonBuffer::readDataChunk: %d / %d (%lf)", m_writeIndex, m_rawSize, oneCycleSkew);
if (!m_autoFollowRate)
{
m_skewRate = 0.0;
}
else if (m_readCycles && ((m_writeIndex < m_rawSize / 10) || (m_rawSize - m_writeIndex < m_rawSize / 10)))
{
m_skewRate = m_skewRateSum / m_readCycles;
if (m_skewRate > 0.2) {
m_skewRate = 0.2;
} else if (m_skewRate < -0.2) {
m_skewRate = -0.2;
}
qDebug("SDRdaemonBuffer::readDataChunk: m_skewRate: %lf", m_skewRate);
}
m_readChunkIndex = 0; // go to start
m_lastWriteIndex = m_writeIndex;
m_readCycles++;
}
uint32_t readIndex = m_readChunkIndex;
m_readChunkIndex++;
return &m_rawBuffer[readIndex * m_chunkSize];
}
void SDRdaemonBufferOld::updateLZ4Sizes(uint32_t frameSize)
{
uint32_t maxInputSize = LZ4_compressBound(frameSize);
if (m_lz4InBuffer) {
delete[] m_lz4InBuffer;
}
m_lz4InBuffer = new uint8_t[maxInputSize];
if (m_lz4OutBuffer) {
delete[] m_lz4OutBuffer;
}
m_lz4OutBuffer = new uint8_t[frameSize];
}
void SDRdaemonBufferOld::updateBufferSize(uint32_t sampleRate)
{
assert(sampleRate % m_rateDivider == 0); // make sure we get an integer number of samples in a chunk
// Store 2 seconds long of samples so we have two one second long half buffers
m_chunkSize = (sampleRate * m_iqSampleSize) / m_rateDivider;
m_rawSize = m_chunkSize * m_rateDivider * 2;
if (m_rawBuffer) {
delete[] m_rawBuffer;
}
m_rawBuffer = new uint8_t[m_rawSize];
m_writeIndex = 0;
m_readChunkIndex = m_rateDivider;
m_readCycles = 0;
m_skewRateSum = 0;
m_skewRate = 0;
std::cerr << "SDRdaemonBuffer::updateBufferSize:"
<< " sampleRate: " << sampleRate
<< " m_chunkSize: " << m_chunkSize
<< " m_rawSize: " << m_rawSize
<< std::endl;
}
void SDRdaemonBufferOld::updateBlockCounts(uint32_t nbBytesReceived)
{
m_nbBlocks += m_bytesInBlock + nbBytesReceived > m_udpPayloadSize ? 1 : 0;
m_bytesInBlock = m_bytesInBlock + nbBytesReceived > m_udpPayloadSize ? nbBytesReceived : m_bytesInBlock + nbBytesReceived;
}
void SDRdaemonBufferOld::printMeta(MetaData *metaData)
{
std::cerr
<< "|" << metaData->m_centerFrequency
<< ":" << metaData->m_sampleRate
<< ":" << (int) (metaData->m_sampleBytes & 0xF)
<< ":" << (int) metaData->m_sampleBits
<< ":" << metaData->m_blockSize
<< ":" << metaData->m_nbSamples
<< "||" << metaData->m_nbBlocks
<< ":" << metaData->m_nbBytes
<< "|" << metaData->m_tv_sec
<< ":" << metaData->m_tv_usec
<< std::endl;
}