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

#2356 Audio playback redesign. Resolves audio playback issue on some (e.g. Kubuntu) systems. For stereo playback, (#2359)

Browse Source 
consolidates left and right channels into a single playback channel.  Implements continuous audio streaming using
silence to fill the gaps to avoid mixer source data line start/stop issues.  Code structure is ready to layer on
multi-channel (ie 5.1 or 7.1) audio playback devices, but that hasn't been tested.

Co-authored-by: denny <dennis.sheirer@gmail.com>
This commit is contained in:
Denny Sheirer
2026-02-08 05:30:39 -05:00
committed by GitHub
parent a2509554db
commit c81e6cccfa
21 changed files with 1817 additions and 1220 deletions
Download Patch File Download Diff File Expand all files Collapse all files

115
src/main/java/io/github/dsheirer/source/mixer/SystemMixerDevices.java
View File

@@ -1,115 +0,0 @@
/*******************************************************************************
* SDR Trunk
* Copyright (C) 2014 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
******************************************************************************/
package io.github.dsheirer.source.mixer;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.TargetDataLine;
import java.util.HashMap;
/**
* THIS CLASS IS SCHEDULED FOR DELETION *****************************
*/
public class SystemMixerDevices {
/**
* Returns a hashmap of mixer names and target data lines that support the
* audio format argument
*
* @param format - requested audio format
* @return - mixer target data lines that support the requested audio format
*/
public static HashMap<String,TargetDataLine> getMixers( AudioFormat format )
{
HashMap<String,TargetDataLine> retVal = new HashMap<String,TargetDataLine>();
DataLine.Info datalineInfo=new DataLine.Info(TargetDataLine.class, format );
for( Mixer.Info mixerInfo: AudioSystem.getMixerInfo() )
{
Mixer mixer = AudioSystem.getMixer( mixerInfo );
if( mixer != null )
{
try
{
TargetDataLine tdl = (TargetDataLine) mixer.getLine( datalineInfo );
if( tdl != null )
{
retVal.put( mixerInfo.getName(), tdl );
}
}
catch( IllegalArgumentException iae )
{
//Do nothing ... mixer doesn't support the audio format
}
catch( LineUnavailableException e )
{
//Do nothing ... mixer doesn't support the audio format
}
}
}
return retVal;
}
public static String getSoundDevices()
{
StringBuilder sb = new StringBuilder();
for( Mixer.Info mixerInfo: AudioSystem.getMixerInfo() )
{
sb.append( "\n--------------------------------------------------" );
sb.append("\nMIXER name:").append(mixerInfo.getName())
.append("\n desc:").append(mixerInfo.getDescription())
.append("\n vendor:").append(mixerInfo.getVendor())
.append("\n version:").append(mixerInfo.getVersion())
.append("\n");
Mixer mixer = AudioSystem.getMixer( mixerInfo );
Line.Info[] sourceLines = mixer.getSourceLineInfo();
for( Line.Info lineInfo: sourceLines )
{
sb.append(" SOURCE LINE desc:").append(lineInfo)
.append("\n class:").append(lineInfo.getClass())
.append("\n lineclass:").append(lineInfo.getLineClass())
.append("\n");
}
Line.Info[] targetLines = mixer.getTargetLineInfo();
for( Line.Info lineInfo: targetLines )
{
sb.append(" TARGET LINE desc:").append(lineInfo)
.append("\n class:").append(lineInfo.getClass())
.append("\n lineclass:").append(lineInfo.getLineClass())
.append("\n");
}
}
return sb.toString();
}
}