GitHub/sdrtrunk
1
0
Fork 0
mirror of https://github.com/DSheirer/sdrtrunk.git synced 2026-11-12 08:37:25 -05:00
Code Issues Packages Projects Releases 2 Wiki Activity

#1568 Updates NBFM decoder configuration so user can enable/disable high-pass filter option in the audio module to effect audio playback and audio recording of the demodulated audio. Disabling the filter allows recording of DC and sub-audible signalling that may be present in the demodulated audio (e.g. LTR or squelching signalling). (#1569)

Browse Source 
Co-authored-by: sheirerd <sheirerd@ainfosec.com>
This commit is contained in:
Denny Sheirer
2023-06-05 07:19:16 -04:00
committed by GitHub
parent 19f7a5171b
commit f792876c0a
4 changed files with 108 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/main/java/io/github/dsheirer/audio/AudioModule.java
View File

@@ -43,6 +43,7 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
{
private static final Logger mLog = LoggerFactory.getLogger(AudioModule.class);
private static float[] sHighPassFilterCoefficients;
private final boolean mAudioFilterEnable;
static
{
@@ -70,27 +71,33 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
}
}
private IRealFilter mHighPassFilter = FilterFactory.getRealFilter(sHighPassFilterCoefficients);
private SquelchStateListener mSquelchStateListener = new SquelchStateListener();
private final IRealFilter mHighPassFilter = FilterFactory.getRealFilter(sHighPassFilterCoefficients);
private final SquelchStateListener mSquelchStateListener = new SquelchStateListener();
private SquelchState mSquelchState = SquelchState.SQUELCH;
/**
* Creates an Audio Module.
*
* @param aliasList for aliasing identifiers
* @param timeslot for this audio module
* @param maxAudioSegmentLength in milliseconds
* @param audioFilterEnable to enable or disable high-pass audio filter
*/
public AudioModule(AliasList aliasList, int timeslot, long maxAudioSegmentLength)
public AudioModule(AliasList aliasList, int timeslot, long maxAudioSegmentLength, boolean audioFilterEnable)
{
super(aliasList, timeslot, maxAudioSegmentLength);
mAudioFilterEnable = audioFilterEnable;
}
/**
* Creates an Audio Module.
* @param aliasList for aliasing identifiers
* @param audioFilterEnable to enable or disable high-pass audio filter
*/
public AudioModule(AliasList aliasList)
public AudioModule(AliasList aliasList, boolean audioFilterEnable)
{
super(aliasList);
mAudioFilterEnable = audioFilterEnable;
}
@Override
@@ -121,7 +128,11 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
{
if(mSquelchState == SquelchState.UNSQUELCH)
{
audioBuffer = mHighPassFilter.filter(audioBuffer);
if(mAudioFilterEnable)
{
audioBuffer = mHighPassFilter.filter(audioBuffer);
}
addAudio(audioBuffer);
}
}