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Memory/CPU performance improvement and Audio/Mixer source restructuring

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Converted to use float primitives and to keep samples in buffer format until the sample rate is decimated to 48kHz.  
Added new non-recursive, CIC decimation filter -- untested

Updated sound card/mixer input source management.  Now testing for mono/stereo support for each card and limiting channel choices accordingly.  Separated the mixersource into a ComplexMixer and and SimplexMixerSource.  The ComplexMixer is used for sound card based tuners like the funcube.  The SimplexMixerSource is used for demodulated sound card inputs.

Interfaces for sample handling - standardized on using 'Complex' to indicate I/Q samples and 'Simplex' to indicate demodulated float samples.  The processing chain now accepts either a decimated (48k) list of complex samples from a tuner channel source, or a 48k simplex buffer (array of demodulated float samples).

Resolved issue with HackRF tuner not applying tuner configuration information.
This commit is contained in:
dennis.sheirer
2014-10-26 10:11:30 +00:00
parent 0ad710fea2
commit e61c3a891c
71 changed files with 1754 additions and 619 deletions
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12
src/dsp/afc/AutomaticFrequencyControl.java
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@@ -1,12 +1,12 @@
package dsp.afc;
import sample.Listener;
import sample.simplex.SimplexSampleListener;
import source.tuner.FrequencyChangeEvent;
import source.tuner.FrequencyChangeListener;
import source.tuner.FrequencyChangeEvent.Attribute;
import source.tuner.FrequencyChangeListener;
import buffer.FloatAveragingBuffer;
public class AutomaticFrequencyControl implements Listener<Float>,
public class AutomaticFrequencyControl implements SimplexSampleListener,
FrequencyChangeListener
{
private static float LARGE_ERROR = 10000.0f;
@@ -65,11 +65,11 @@ public class AutomaticFrequencyControl implements Listener<Float>,
}
@Override
public void receive( Float sample )
public void receive( float sample )
{
if( mMode == Mode.FAST )
{
float average = mBuffer.get( sample.floatValue() );
float average = mBuffer.get( sample );
mSampleCounter++;
@@ -88,7 +88,7 @@ public class AutomaticFrequencyControl implements Listener<Float>,
{
mSkipCounter = 0;
float average = mBuffer.get( sample.floatValue() );
float average = mBuffer.get( sample );
mSampleCounter++;