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Resolves #393 - Adds support for recording demodulated (raw) bitstream

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buffers.  None of the decoders currently support this yet, but the P25
will be updated to provide bitstream output for recording.

Renames the ReusableBuffer class to ReusableFloatBuffer for
consistency.
This commit is contained in:
Denny
2018-08-11 08:02:58 -04:00
parent d7e018f66e
commit 5f8f2ec330
64 changed files with 936 additions and 407 deletions
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20
src/main/java/io/github/dsheirer/dsp/afsk/AFSK1200Decoder.java
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@@ -21,7 +21,7 @@ import io.github.dsheirer.dsp.filter.resample.RealResampler;
import io.github.dsheirer.dsp.mixer.IOscillator;
import io.github.dsheirer.dsp.mixer.Oscillator;
import io.github.dsheirer.sample.Listener;
import io.github.dsheirer.sample.buffer.ReusableBuffer;
import io.github.dsheirer.sample.buffer.ReusableFloatBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -34,7 +34,7 @@ import org.slf4j.LoggerFactory;
*
* Provides normal or inverted decoded output.
*/
public class AFSK1200Decoder implements Listener<ReusableBuffer>
public class AFSK1200Decoder implements Listener<ReusableFloatBuffer>
{
private final static Logger mLog = LoggerFactory.getLogger(AFSK1200Decoder.class);
@@ -110,7 +110,7 @@ public class AFSK1200Decoder implements Listener<ReusableBuffer>
* @param buffer containing 8.0 kHz unfiltered FM demodulated audio samples with sub-audible LTR signalling.
*/
@Override
public void receive(ReusableBuffer buffer)
public void receive(ReusableFloatBuffer buffer)
{
mResampler.resample(buffer);
}
@@ -142,10 +142,10 @@ public class AFSK1200Decoder implements Listener<ReusableBuffer>
}
public class Decoder implements Listener<ReusableBuffer>
public class Decoder implements Listener<ReusableFloatBuffer>
{
@Override
public void receive(ReusableBuffer buffer)
public void receive(ReusableFloatBuffer buffer)
{
//Calculate correlation values against each 1200/1800 reference signal
mCorrelationValuesMark = mCorrelatorMark.process(buffer);
@@ -212,17 +212,17 @@ public class AFSK1200Decoder implements Listener<ReusableBuffer>
* Processes each sample in the incoming sample buffer against a generated reference sample set for one symbol
* period to derive a correlation value that is in-turn averaged over one symbol period.
*
* @param reusableBuffer containing FM demodulated samples
* @param reusableFloatBuffer containing FM demodulated samples
* @return a reusable array of correlation values for each sample
*/
public float[] process(ReusableBuffer reusableBuffer)
public float[] process(ReusableFloatBuffer reusableFloatBuffer)
{
if(mCorrelationValues == null || mCorrelationValues.length != reusableBuffer.getSampleCount())
if(mCorrelationValues == null || mCorrelationValues.length != reusableFloatBuffer.getSampleCount())
{
mCorrelationValues = new float[reusableBuffer.getSampleCount()];
mCorrelationValues = new float[reusableFloatBuffer.getSampleCount()];
}
float[] samples = reusableBuffer.getSamples();
float[] samples = reusableFloatBuffer.getSamples();
int y;