Songdb java version, source. only 1.5 compatible

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 215 insertions, 0 deletions

diff --git a/songdbj/javazoom/jl/player/JavaSoundAudioDevice.java b/songdbj/javazoom/jl/player/JavaSoundAudioDevice.java
new file mode 100644
index 0000000..caa92cd
--- /dev/null
+++ b/songdbj/javazoom/jl/player/JavaSoundAudioDevice.java
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+/*
+ * 11/26/04		Buffer size modified to support JRE 1.5 optimizations.
+ *              (CPU usage < 1% under P4/2Ghz, RAM < 12MB).
+ *              jlayer@javazoom.net
+ * 11/19/04		1.0 moved to LGPL.
+ * 06/04/01		Too fast playback fixed. mdm@techie.com
+ * 29/01/00		Initial version. mdm@techie.com
+ *-----------------------------------------------------------------------
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as published
+ *   by the Free Software Foundation; either version 2 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 Library General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *----------------------------------------------------------------------
+ */
+
+package javazoom.jl.player;
+
+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.SourceDataLine;
+
+import javazoom.jl.decoder.Decoder;
+import javazoom.jl.decoder.JavaLayerException;
+
+/**
+ * The <code>JavaSoundAudioDevice</code> implements an audio
+ * device by using the JavaSound API.
+ *
+ * @since 0.0.8
+ * @author Mat McGowan
+ */
+public class JavaSoundAudioDevice extends AudioDeviceBase
+{
+	private SourceDataLine	source = null;
+
+	private AudioFormat		fmt = null;
+
+	private byte[]			byteBuf = new byte[4096];
+
+	protected void setAudioFormat(AudioFormat fmt0)
+	{
+		fmt = fmt0;
+	}
+
+	protected AudioFormat getAudioFormat()
+	{
+		if (fmt==null)
+		{
+			Decoder decoder = getDecoder();
+			fmt = new AudioFormat(decoder.getOutputFrequency(),
+								  16,
+								  decoder.getOutputChannels(),
+								  true,
+								  false);
+		}
+		return fmt;
+	}
+
+	protected DataLine.Info getSourceLineInfo()
+	{
+		AudioFormat fmt = getAudioFormat();
+		//DataLine.Info info = new DataLine.Info(SourceDataLine.class, fmt, 4000);
+		DataLine.Info info = new DataLine.Info(SourceDataLine.class, fmt);
+		return info;
+	}
+
+	public void open(AudioFormat fmt) throws JavaLayerException
+	{
+		if (!isOpen())
+		{
+			setAudioFormat(fmt);
+			openImpl();
+			setOpen(true);
+		}
+	}
+
+	protected void openImpl()
+		throws JavaLayerException
+	{
+	}
+
+
+	// createSource fix.
+	protected void createSource() throws JavaLayerException
+    {
+        Throwable t = null;
+        try
+        {
+			Line line = AudioSystem.getLine(getSourceLineInfo());
+            if (line instanceof SourceDataLine)
+            {
+         		source = (SourceDataLine)line;
+                //source.open(fmt, millisecondsToBytes(fmt, 2000));
+				source.open(fmt);
+                /*
+                if (source.isControlSupported(FloatControl.Type.MASTER_GAIN))
+                {
+					FloatControl c = (FloatControl)source.getControl(FloatControl.Type.MASTER_GAIN);
+                    c.setValue(c.getMaximum());
+                }*/
+                source.start();
+
+            }
+        } catch (RuntimeException ex)
+          {
+			  t = ex;
+          }
+          catch (LinkageError ex)
+          {
+              t = ex;
+          }
+          catch (LineUnavailableException ex)
+          {
+              t = ex;
+          }
+		if (source==null) throw new JavaLayerException("cannot obtain source audio line", t);
+    }
+
+	public int millisecondsToBytes(AudioFormat fmt, int time)
+	{
+		return (int)(time*(fmt.getSampleRate()*fmt.getChannels()*fmt.getSampleSizeInBits())/8000.0);
+	}
+
+	protected void closeImpl()
+	{
+		if (source!=null)
+		{
+			source.close();
+		}
+	}
+
+	protected void writeImpl(short[] samples, int offs, int len)
+		throws JavaLayerException
+	{
+		if (source==null)
+			createSource();
+
+		byte[] b = toByteArray(samples, offs, len);
+		source.write(b, 0, len*2);
+	}
+
+	protected byte[] getByteArray(int length)
+	{
+		if (byteBuf.length < length)
+		{
+			byteBuf = new byte[length+1024];
+		}
+		return byteBuf;
+	}
+
+	protected byte[] toByteArray(short[] samples, int offs, int len)
+	{
+		byte[] b = getByteArray(len*2);
+		int idx = 0;
+		short s;
+		while (len-- > 0)
+		{
+			s = samples[offs++];
+			b[idx++] = (byte)s;
+			b[idx++] = (byte)(s>>>8);
+		}
+		return b;
+	}
+
+	protected void flushImpl()
+	{
+		if (source!=null)
+		{
+			source.drain();
+		}
+	}
+
+	public int getPosition()
+	{
+		int pos = 0;
+		if (source!=null)
+		{
+			pos = (int)(source.getMicrosecondPosition()/1000);
+		}
+		return pos;
+	}
+
+	/**
+	 * Runs a short test by playing a short silent sound.
+	 */
+	public void test()
+		throws JavaLayerException
+	{
+		try
+		{
+			open(new AudioFormat(22050, 16, 1, true, false));
+			short[] data = new short[22050/10];
+			write(data, 0, data.length);
+			flush();
+			close();
+		}
+		catch (RuntimeException ex)
+		{
+			throw new JavaLayerException("Device test failed: "+ex);
+		}
+
+	}
+}