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LimeSDR output: regulate Tx output

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This commit is contained in:
f4exb
2017-04-24 03:12:02 +02:00
parent e0b7027756
commit d1e16b6ab0
8 changed files with 67 additions and 13 deletions
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plugins/samplesink/limesdroutput/limesdroutputthread.cpp
+35 -2
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@@ -24,6 +24,7 @@ LimeSDROutputThread::LimeSDROutputThread(lms_stream_t* stream, SampleSourceFifo*
m_running(false),
m_stream(stream),
m_sampleFifo(sampleFifo),
m_sampleRate(5000000),
m_log2Interp(0),
m_fcPos(LimeSDROutputSettings::FC_POS_CENTER)
{
@@ -66,7 +67,8 @@ void LimeSDROutputThread::setFcPos(int fcPos)
void LimeSDROutputThread::run()
{
int res;
int res, count, msleep, mdelta;
lms_stream_status_t streamStatus;
lms_stream_meta_t metadata; //Use metadata for additional control over sample receive function behaviour
metadata.flushPartialPacket = false; //Do not discard data remainder when read size differs from packet size
@@ -81,15 +83,46 @@ void LimeSDROutputThread::run()
qDebug("LimeSDROutputThread::run: stream started");
}
count = 0;
msleep = LIMESDROUTPUT_BLOCKSIZE/(m_sampleRate/1e6f);
mdelta = msleep/100;
msleep = (3*msleep)/4; // to start faster
while (m_running)
{
callback(m_buf, LIMESDROUTPUT_BLOCKSIZE);
if ((res = LMS_SendStream(m_stream, (void *) m_buf, LIMESDROUTPUT_BLOCKSIZE, &metadata, 1000)) < 0)
res = LMS_SendStream(m_stream, (void *) m_buf, LIMESDROUTPUT_BLOCKSIZE, &metadata, 1000);
if (res < 0)
{
qCritical("LimeSDROutputThread::run write error: %s", strerror(errno));
break;
}
else if (res != LIMESDROUTPUT_BLOCKSIZE)
{
qDebug("LimeSDROutputThread::run written %d/%d samples", res, LIMESDROUTPUT_BLOCKSIZE);
}
usleep(msleep);
if (count < 10)
{
count++;
}
else
{
if (LMS_GetStreamStatus(m_stream, &streamStatus) == 0)
{
if (streamStatus.fifoFilledCount < (4*streamStatus.fifoSize)/5) { // FIFO at 80%
msleep -= mdelta;
} else {
msleep += mdelta;
}
}
count = 0;
}
}
if (LMS_StopStream(m_stream) < 0) {