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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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8
src/source/wave/FloatWaveSource.java
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@@ -29,7 +29,7 @@ import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import sample.Listener;
import sample.simplex.SimplexSampleListener;
public class FloatWaveSource extends WaveSource
{
@@ -44,7 +44,7 @@ public class FloatWaveSource extends WaveSource
private int mBufferPointer = 0;
private int mBufferLength;
private ShortBuffer mBufferWrapper;
private Listener<Float> mListener;
private SimplexSampleListener mListener;
private static int BUFFER_SAMPLE_SIZE = 2000;
@@ -272,12 +272,12 @@ public class FloatWaveSource extends WaveSource
/**
* Adds a new listener to receive samples as they are read from the wave file
*/
public void setListener( Listener<Float> listener )
public void setListener( SimplexSampleListener listener )
{
mListener = listener;
}
public void removeListener( Listener<Float> listener )
public void removeListener( SimplexSampleListener listener )
{
mListener = null;
}