mirror of
https://github.com/f4exb/sdrangel.git
synced 2025-10-31 13:00:26 -04:00
312 lines
8.2 KiB
C++
312 lines
8.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// 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 <cassert>
|
|
#include <cstring>
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
#include "sdrdaemonbuffer.h"
|
|
|
|
const int SDRdaemonBuffer::m_udpPayloadSize = 512;
|
|
const int SDRdaemonBuffer::m_sampleSize = 2;
|
|
const int SDRdaemonBuffer::m_iqSampleSize = 2 * m_sampleSize;
|
|
|
|
SDRdaemonBuffer::SDRdaemonBuffer(uint32_t rateDivider) :
|
|
m_rateDivider(rateDivider),
|
|
m_sync(false),
|
|
m_lz4(false),
|
|
m_inCount(0),
|
|
m_lz4InBuffer(0),
|
|
m_lz4InCount(0),
|
|
m_lz4InSize(0),
|
|
m_lz4OutBuffer(0),
|
|
m_frameSize(0),
|
|
m_nbDecodes(0),
|
|
m_nbSuccessfulDecodes(0),
|
|
m_nbCRCOK(0),
|
|
m_dataCRC(0),
|
|
m_sampleRate(1000000),
|
|
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_currentMeta.init();
|
|
}
|
|
|
|
SDRdaemonBuffer::~SDRdaemonBuffer()
|
|
{
|
|
if (m_rawBuffer) {
|
|
delete[] m_rawBuffer;
|
|
}
|
|
|
|
if (m_lz4InBuffer) {
|
|
delete[] m_lz4InBuffer;
|
|
}
|
|
|
|
if (m_lz4OutBuffer) {
|
|
delete[] m_lz4OutBuffer;
|
|
}
|
|
}
|
|
|
|
bool SDRdaemonBuffer::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)
|
|
{
|
|
memcpy((void *) &m_dataCRC, (const void *) &array[sizeof(MetaData)], 8);
|
|
m_nbBlocks = 0;
|
|
m_inCount = 0;
|
|
|
|
if (!(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;
|
|
uint32_t sampleRate = metaData->m_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 SDRdaemonBuffer::writeData(char *array, uint32_t length)
|
|
{
|
|
if ((m_sync) && (m_nbBlocks > 0))
|
|
{
|
|
if (m_lz4)
|
|
{
|
|
writeDataLZ4(array, length);
|
|
}
|
|
else
|
|
{
|
|
writeToRawBufferUncompressed(array, length);
|
|
}
|
|
}
|
|
}
|
|
|
|
void SDRdaemonBuffer::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_nbDecodes == 100)
|
|
{
|
|
std::cerr << "SDRdaemonBuffer::writeAndReadLZ4:"
|
|
<< " decoding: " << m_nbCRCOK
|
|
<< ":" << m_nbSuccessfulDecodes
|
|
<< "/" << m_nbDecodes
|
|
<< std::endl;
|
|
|
|
m_nbDecodes = 0;
|
|
m_nbSuccessfulDecodes = 0;
|
|
m_nbCRCOK = 0;
|
|
}
|
|
|
|
uint64_t crc64 = m_crc64.calculate_crc(m_lz4InBuffer, m_lz4InSize);
|
|
|
|
if (memcmp(&crc64, &m_dataCRC, 8) == 0)
|
|
{
|
|
m_nbCRCOK++;
|
|
}
|
|
|
|
int compressedSize = LZ4_decompress_fast((const char*) m_lz4InBuffer, (char*) &m_rawBuffer[m_writeIndex], m_frameSize);
|
|
m_nbDecodes++;
|
|
|
|
if (compressedSize == m_lz4InSize)
|
|
{
|
|
m_nbSuccessfulDecodes++;
|
|
}
|
|
|
|
writeToRawBufferLZ4((const char *) m_lz4InBuffer, m_frameSize);
|
|
|
|
m_lz4InCount = 0;
|
|
}
|
|
}
|
|
|
|
void SDRdaemonBuffer::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);
|
|
m_writeIndex = length - (m_rawSize - m_writeIndex);
|
|
std::memcpy((void *) m_rawBuffer, (const void *) &array[m_rawSize - m_writeIndex], m_writeIndex);
|
|
}
|
|
}
|
|
|
|
void SDRdaemonBuffer::writeToRawBufferLZ4(const char *array, uint32_t length)
|
|
{
|
|
int compressedSize = LZ4_decompress_fast((const char*) m_lz4InBuffer, (char*) m_lz4OutBuffer, m_frameSize);
|
|
m_nbDecodes++;
|
|
|
|
if (compressedSize == m_lz4InSize)
|
|
{
|
|
m_nbSuccessfulDecodes++;
|
|
}
|
|
|
|
writeToRawBufferUncompressed((const char *) m_lz4OutBuffer, m_frameSize);
|
|
}
|
|
|
|
uint8_t *SDRdaemonBuffer::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 or middle of raw buffer
|
|
{
|
|
// make sure the read and write pointers are not in the same half of the raw buffer
|
|
if (m_writeIndex < m_rateDivider * m_chunkSize - 1)
|
|
{
|
|
m_readChunkIndex = m_rateDivider; // go to middle
|
|
}
|
|
else
|
|
{
|
|
m_readChunkIndex = 0; // go to start
|
|
}
|
|
}
|
|
|
|
uint32_t readIndex = m_readChunkIndex;
|
|
m_readChunkIndex++;
|
|
return &m_rawBuffer[readIndex * m_chunkSize];
|
|
}
|
|
|
|
void SDRdaemonBuffer::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 SDRdaemonBuffer::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;
|
|
|
|
std::cerr << "SDRdaemonBuffer::updateBufferSize:"
|
|
<< " sampleRate: " << sampleRate
|
|
<< " m_chunkSize: " << m_chunkSize
|
|
<< " m_rawSize: " << m_rawSize
|
|
<< std::endl;
|
|
}
|
|
|
|
void SDRdaemonBuffer::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 SDRdaemonBuffer::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;
|
|
}
|
|
|