sdrangel/sdrbase/channel/remotedatareadqueue.cpp

161 wiersze
5.2 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
// //
// Remote sink channel (Rx) data blocks to read queue //
// //
// SDRangel can serve as a remote SDR front end that handles the interface //
// with a physical device and sends or receives the I/Q samples stream via UDP //
// to or from another SDRangel instance or any program implementing the same //
// protocol. The remote SDRangel is controlled via its Web REST API. //
// //
// 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 //
// (at your option) any later version. //
// //
// 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 <channel/remotedatablock.h>
#include <channel/remotedatareadqueue.h>
const uint32_t RemoteDataReadQueue::MinimumMaxSize = 10;
RemoteDataReadQueue::RemoteDataReadQueue() :
m_dataBlock(0),
m_maxSize(MinimumMaxSize),
m_blockIndex(1),
m_sampleIndex(0),
m_sampleCount(0),
m_full(false)
{}
RemoteDataReadQueue::~RemoteDataReadQueue()
{
RemoteDataBlock* data;
while ((data = pop()) != 0)
{
qDebug("RemoteDataReadQueue::~RemoteDataReadQueue: data block was still in queue");
delete data;
}
}
void RemoteDataReadQueue::push(RemoteDataBlock* dataBlock)
{
if (length() >= m_maxSize)
{
qWarning("RemoteDataReadQueue::push: queue is full");
m_full = true; // stop filling the queue
RemoteDataBlock *data = m_dataReadQueue.takeLast();
delete data;
}
if (m_full) {
m_full = (length() > m_maxSize/2); // do not fill queue again before queue is half size
}
if (!m_full) {
m_dataReadQueue.append(dataBlock);
}
}
RemoteDataBlock* RemoteDataReadQueue::pop()
{
if (m_dataReadQueue.isEmpty())
{
return 0;
}
else
{
m_blockIndex = 1;
m_sampleIndex = 0;
return m_dataReadQueue.takeFirst();
}
}
void RemoteDataReadQueue::setSize(uint32_t size)
{
if (size != m_maxSize) {
m_maxSize = size < MinimumMaxSize ? MinimumMaxSize : size;
}
}
void RemoteDataReadQueue::readSample(Sample& s, bool scaleForTx)
{
// depletion/repletion state
if (m_dataBlock == 0)
{
if (length() >= m_maxSize/2)
{
qDebug("RemoteDataReadQueue::readSample: initial pop new block: queue size: %u", length());
m_blockIndex = 1;
m_dataBlock = m_dataReadQueue.takeFirst();
convertDataToSample(s, m_blockIndex, m_sampleIndex, scaleForTx);
m_sampleIndex++;
m_sampleCount++;
}
else
{
s = Sample{0, 0};
}
return;
}
int sampleSize = m_dataBlock->m_superBlocks[m_blockIndex].m_header.m_sampleBytes * 2;
uint32_t samplesPerBlock = RemoteNbBytesPerBlock / sampleSize;
if (m_sampleIndex < samplesPerBlock)
{
convertDataToSample(s, m_blockIndex, m_sampleIndex, scaleForTx);
m_sampleIndex++;
m_sampleCount++;
}
else
{
m_sampleIndex = 0;
m_blockIndex++;
if (m_blockIndex < RemoteNbOrginalBlocks)
{
convertDataToSample(s, m_blockIndex, m_sampleIndex, scaleForTx);
m_sampleIndex++;
m_sampleCount++;
}
else
{
delete m_dataBlock;
m_dataBlock = 0;
if (length() == 0) {
qWarning("RemoteDataReadQueue::readSample: try to pop new block but queue is empty");
}
if (length() > 0)
{
//qDebug("RemoteDataReadQueue::readSample: pop new block: queue size: %u", length());
m_blockIndex = 1;
m_dataBlock = m_dataReadQueue.takeFirst();
convertDataToSample(s, m_blockIndex, m_sampleIndex, scaleForTx);
m_sampleIndex++;
m_sampleCount++;
}
else
{
s = Sample{0, 0};
}
}
}
}