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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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10
src/decode/mdc1200/MDCDecoder.java
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@@ -25,7 +25,7 @@ import instrument.tap.stream.FloatTap;
import java.util.ArrayList;
import java.util.List;
import sample.Listener;
import sample.simplex.SimplexSampleListener;
import source.Source.SampleType;
import alias.AliasList;
import bits.MessageFramer;
@@ -79,7 +79,7 @@ public class MDCDecoder extends Decoder implements Instrumentable
/* Decimation filter: 48000 / 2 = 24000 */
mDecimationFilter = new FloatHalfBandFilter(
Filters.FIR_HALF_BAND_31T_ONE_EIGHTH_FCO, 1.0002 );
addFloatListener( mDecimationFilter );
addSimplexSampleListener( mDecimationFilter );
/* Bandpass filter - predefined */
mBandPassFilter = new FloatFIRFilter(
@@ -154,7 +154,7 @@ public class MDCDecoder extends Decoder implements Instrumentable
switch( tap.getName() )
{
case INSTRUMENT_INPUT:
addFloatListener( (FloatTap)tap );
addSimplexSampleListener( (FloatTap)tap );
break;
case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
/* wire the tap between the bandpass filter and the demod */
@@ -186,7 +186,7 @@ public class MDCDecoder extends Decoder implements Instrumentable
switch( tap.getName() )
{
case INSTRUMENT_INPUT:
removeFloatListener( (FloatTap)tap );
removeSimplexListener( (FloatTap)tap );
break;
case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
mBandPassFilter.setListener( mFSKDecoder );
@@ -202,7 +202,7 @@ public class MDCDecoder extends Decoder implements Instrumentable
}
@Override
public void addUnfilteredFloatListener( Listener<Float> listener )
public void addUnfilteredSimplexSampleListener( SimplexSampleListener listener )
{
//Not implemented
}