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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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7
src/source/tuner/rtl/ByteSampleAdapter.java
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@@ -17,7 +17,8 @@
******************************************************************************/
package source.tuner.rtl;
import source.mixer.SampleAdapter;
import sample.adapter.SampleAdapter;
import sample.complex.ComplexBuffer;
public class ByteSampleAdapter extends SampleAdapter
{
@@ -40,9 +41,9 @@ public class ByteSampleAdapter extends SampleAdapter
}
@Override
public Float[] convert( byte[] samples )
public float[] convert( byte[] samples )
{
Float[] convertedSamples = new Float[ samples.length ];
float[] convertedSamples = new float[ samples.length ];
int pointer = 0;
for( byte sample: samples )