/*
* Copyright (c) 2008 Wayne Meissner
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.gstreamer.example;
import java.io.File;
import java.util.concurrent.TimeUnit;
import org.gstreamer.Bin;
import org.gstreamer.Element;
import org.gstreamer.ElementFactory;
import org.gstreamer.GhostPad;
import org.gstreamer.Gst;
import org.gstreamer.Pipeline;
import org.gstreamer.elements.PlayBin2;
/**
* An audiopanorama element example.
* <p>
* This example just creates a basic audio source and makes the output appear to
* continuously sweep from left to right and back again.
*/
public class AudioPanorama {
private final static int PERIOD = 1000; // milliseconds for sweep time
public static void main(String[] args) {
//
// Initialize the gstreamer framework, and let it interpret any command
// line flags it is interested in.
//
args = Gst.init("AudioPanorama", args);
PanoramaSink sink = new PanoramaSink("panorama sink");
Pipeline pipe;
if (args.length > 0) {
PlayBin2 playbin = new PlayBin2("AudioPanorama");
playbin.setInputFile(new File(args[0]));
playbin.setAudioSink(sink);
pipe = playbin;
} else {
pipe = new Pipeline("AudioPanorama");
Element src = ElementFactory.make("audiotestsrc", "src");
src.set("wave", 2);
Element convert = ElementFactory.make("audioconvert", "convert");
pipe.addMany(src, convert, sink);
Element.linkMany(src, convert, sink);
}
Gst.getScheduledExecutorService().scheduleAtFixedRate(new Panner(sink),
100, PERIOD / 100, TimeUnit.MILLISECONDS);
// Start the pipeline playing
pipe.play();
Gst.main();
// Clean up (gstreamer requires elements to be in State.NULL before disposal)
pipe.stop();
}
private static final class PanoramaSink extends Bin {
private final Element audiopanorama;
private final Element convert;
private final Element sink;
public PanoramaSink(String name) {
super(name);
audiopanorama = ElementFactory.make("audiopanorama", "panorama");
convert = ElementFactory.make("audioconvert", "convert");
sink = ElementFactory.make("autoaudiosink", "audiosink");
addMany(audiopanorama, convert, sink);
linkMany(audiopanorama, convert, sink);
addPad(new GhostPad("sink", audiopanorama.getStaticPad("sink")));
}
public void setPanorama(float pan) {
audiopanorama.set("panorama", pan);
}
@SuppressWarnings("unused")
public float getPanorama() {
return ((Number) audiopanorama.get("panorama")).floatValue();
}
}
private static final class Panner implements Runnable {
private float pan = -1.0f;
private float incr = 0.01f;
private final PanoramaSink sink;
private Panner(PanoramaSink sink) {
this.sink = sink;
}
public void run() {
sink.setPanorama(pan);
pan += incr;
if (pan > 1.0f || pan < -1.0f) {
// start sweeping in the opposite direction
incr = 0f - incr;
pan += incr;
}
}
}
}