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SDRdaemon plugin: auto adaptive throttling

This commit is contained in:
Edouard Griffiths 2016-03-15 18:06:02 +01:00
parent 35db910ba9
commit f9c13dace9
2 changed files with 20 additions and 6 deletions
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23
plugins/samplesource/sdrdaemon/sdrdaemonudphandler.cpp
View File

@ -43,7 +43,10 @@ SDRdaemonUDPHandler::SDRdaemonUDPHandler(SampleFifo *sampleFifo, MessageQueue *o
m_tickCount(0),
m_samplesCount(0),
m_timer(0),
m_throttlems(SDRDAEMON_THROTTLE_MS)
m_throttlems(SDRDAEMON_THROTTLE_MS),
m_readLengthSamples(0),
m_readLength(0),
m_throttleToggle(false)
{
m_udpBuf = new char[SDRdaemonBuffer::m_udpPayloadSize];
}
@ -81,6 +84,7 @@ void SDRdaemonUDPHandler::start()
// Need to notify the DSP engine to actually start
DSPSignalNotification *notif = new DSPSignalNotification(m_samplerate, m_centerFrequency * 1000); // Frequency in Hz for the DSP engine
DSPEngine::instance()->getInputMessageQueue()->push(notif);
m_elapsedTimer.start();
}
void SDRdaemonUDPHandler::stop()
@ -200,13 +204,20 @@ void SDRdaemonUDPHandler::connectTimer(const QTimer* timer)
void SDRdaemonUDPHandler::tick()
{
// TOOD: auto throttling
uint32_t readLengthSamples = (m_sdrDaemonBuffer.getSampleRate() * m_throttlems) / 1000;
uint32_t readLength = readLengthSamples * SDRdaemonBuffer::m_iqSampleSize;
// auto throttling
int throttlems = m_elapsedTimer.restart();
if (throttlems != m_throttlems)
{
m_throttlems = throttlems;
m_readLengthSamples = (m_sdrDaemonBuffer.getSampleRate() * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000;
m_readLength = m_readLengthSamples * SDRdaemonBuffer::m_iqSampleSize;
m_throttleToggle = !m_throttleToggle;
}
// read samples directly feeding the SampleFifo (no callback)
m_sampleFifo->write(reinterpret_cast<quint8*>(m_sdrDaemonBuffer.readData(readLength)), readLength);
m_samplesCount += readLengthSamples;
m_sampleFifo->write(reinterpret_cast<quint8*>(m_sdrDaemonBuffer.readData(m_readLength)), m_readLength);
m_samplesCount += m_readLengthSamples;
if (m_tickCount < m_rateDivider)
{

3
plugins/samplesource/sdrdaemon/sdrdaemonudphandler.h
View File

@ -65,6 +65,9 @@ private:
const QTimer *m_timer;
QElapsedTimer m_elapsedTimer;
int m_throttlems;
uint32_t m_readLengthSamples;
uint32_t m_readLength;
bool m_throttleToggle;
static const int m_rateDivider;