GitHub/sdrtrunk
1
0
Fork 0
mirror of https://github.com/DSheirer/sdrtrunk.git synced 2026-11-12 16:47:31 -05:00
Code Issues Packages Projects Releases 2 Wiki Activity

[WIP] Implements reusable sample buffers across all components. This

Browse Source 
produces a significant reduction in memory usage, especially for tuners
like the airspy and hackrf that produce 10/20 MSPS sample rates.  This
is observed to be around 66% reduction in peak memory usage and provides
a more stable memory utilization across time reducing stress on the
garbage collector.

Use of these reusable memory buffers will be pushed further down into
the processing chain modules to ensure we keep new object creation
to the lowest levels possible.
This commit is contained in:
Denny
2018-02-03 10:05:16 -05:00
parent fcd3c2fd46
commit f2f2c92afe
56 changed files with 1630 additions and 1255 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/main/java/io/github/dsheirer/module/demodulate/fm/FMDemodulatorModule.java
View File

@@ -24,13 +24,14 @@ import io.github.dsheirer.dsp.fm.FMDemodulator_CB;
import io.github.dsheirer.module.Module;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.complex.ComplexBuffer;
import io.github.dsheirer.sample.complex.IComplexBufferListener;
import io.github.dsheirer.sample.complex.reusable.IReusableComplexBufferListener;
import io.github.dsheirer.sample.complex.reusable.ReusableComplexBuffer;
import io.github.dsheirer.sample.real.IUnFilteredRealBufferProvider;
import io.github.dsheirer.sample.real.RealBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class FMDemodulatorModule extends Module implements IComplexBufferListener, IUnFilteredRealBufferProvider
public class FMDemodulatorModule extends Module implements IReusableComplexBufferListener, IUnFilteredRealBufferProvider
{
private final static Logger mLog = LoggerFactory.getLogger(FMDemodulatorModule.class);
@@ -38,6 +39,7 @@ public class FMDemodulatorModule extends Module implements IComplexBufferListene
private ComplexFIRFilter_CB_CB mIQFilter;
private FMDemodulator_CB mDemodulator;
private ReusableBufferListener mReusableBufferListener = new ReusableBufferListener();
/**
* FM Demodulator with I/Q filter. Demodulated output is unfiltered and
@@ -68,9 +70,9 @@ public class FMDemodulatorModule extends Module implements IComplexBufferListene
}
@Override
public Listener<ComplexBuffer> getComplexBufferListener()
public Listener<ReusableComplexBuffer> getReusableComplexBufferListener()
{
return mIQFilter;
return mReusableBufferListener;
}
@Override
@@ -110,4 +112,18 @@ public class FMDemodulatorModule extends Module implements IComplexBufferListene
public void stop()
{
}
public class ReusableBufferListener implements Listener<ReusableComplexBuffer>
{
@Override
public void receive(ReusableComplexBuffer reusableComplexBuffer)
{
float[] samples = reusableComplexBuffer.getCopyOfSamples();
//TODO: redesign the filter chain so that we can simply pass a float array ...
mIQFilter.receive(new ComplexBuffer(samples));
reusableComplexBuffer.decrementUserCount();
}
}
}