gcc-4.3.1/libjava/classpath/gnu/javax/sound/sampled/gstreamer/io/GstAudioFileReaderNativePeer.java - toolchain/gcc - Git at Google

 /*GstAudioFileReaderNativePeer -- GNU Classpath GStreamer AudioFileReader
   native peer class.
  Copyright (C) 2007 Free Software Foundation, Inc.

 This file is part of GNU Classpath.

 GNU Classpath 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 2, or (at your option)
 any later version.

 GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */

 package gnu.javax.sound.sampled.gstreamer.io;

 import gnu.javax.sound.sampled.gstreamer.GStreamerMixer;

 import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.Map;

 import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioSystem;
 import javax.sound.sampled.AudioFormat.Encoding;

 /**
  * GStreamer native peer for GstAudioFileReader.
  *
  * @author Mario Torre <neugens@limasoftware.net>
  */
 final class GstAudioFileReaderNativePeer
 {
   private static final String GST_ENCODING = "GStreamer Generic Audio Reader";

   private static class GstHeader
   {
     /*
      * NOTE: these properties are accessed by the native code, be careful
      * if you change them.
      * Not all the fields are necessarily set.
      *
      */
     public String file = null;

     public String suffix = null;

     public String name = null;

     public String mimetype = null;

     public String endianness = null;

     public String channels = null;

     public String rate = null;

     public String width = null;

     public String depth = null;

     public String isSigned = null;

     public String layer = null;
     public String bitrate = null;
     public String framed = null;
     public String type = null;
   }

   public static AudioFormat getAudioFormat(File file) throws Exception
   {
     GstHeader header = new GstHeader();
     header.file = file.getAbsolutePath();

     if (!gstreamer_get_audio_format_file(header))
       return null;

     return getAudioFormat(header);
   }

   public static AudioFormat getAudioFormat(InputStream is) throws Exception
   {
     GstHeader header = new GstHeader();

     BufferedInputStream stream = new BufferedInputStream(is);
     if(!stream.markSupported())
       throw new IOException("Stream must support marking.");

     stream.mark(0);

     if (!gstreamer_get_audio_format_stream(header, stream))
       return null;

     return getAudioFormat(header);
   }

   public static AudioFormat getAudioFormat(URL url) throws Exception
   {
     GstHeader header = new GstHeader();
     header.file = url.toExternalForm();

     BufferedInputStream stream = new BufferedInputStream(url.openStream());
     if(!stream.markSupported())
       throw new IOException("Stream must support marking.");

     stream.mark(0);

     if (!gstreamer_get_audio_format_stream(header, stream))
       return null;

     return getAudioFormat(header);
   }

   private static Encoding getEncoding(GstHeader header)
   {
     StringBuilder buffer = new StringBuilder();

     if (header.name == null)
       {
         buffer.append(GST_ENCODING);
         if (header.mimetype != null)
           {
             buffer.append(" ");
             buffer.append(header.mimetype);
           }

         header.name = buffer.toString();
       }
     else
       {
         // strip the "decoder" word from the name, if any
         // this is a bit ugly, the alternative would be to still output the
         // full name of the decoder/demuxer
         String lowerCase = header.name.toLowerCase();
         int index = lowerCase.indexOf("decoder");
         if (index == -1)
           {
             index = lowerCase.indexOf("demuxer");
           }

         if (index == -1)
           index = lowerCase.length();

         buffer.append(header.name.substring(0, index));

       }

     return new Encoding(buffer.toString().trim());
   }

   private static AudioFormat getAudioFormat(GstHeader header)
     throws Exception
   {
     int na = AudioSystem.NOT_SPECIFIED;

     /* we use mimetype as an header, but this could have some side effects */
     Encoding encoding = getEncoding(header);

     float sampleRate = ((header.rate != null) ?
                          new Float(header.rate).floatValue() : na);

     int sampleSizeInBits = ((header.depth != null) ?
                              new Integer(header.depth).intValue() : na);

     int channels = ((header.channels != null) ?
                      new Integer(header.channels).intValue() : na);

     boolean bigEndian = false;
     if (header.endianness != null)
       {
         if (header.endianness.compareTo("4321") == 0)
           bigEndian = true;
       }

     int frameSize = na;
     float frameRate = na;
     String lowerCase = header.name.toLowerCase();

     // FIXME: frameRate = sampleRate in these cases under all the tests so far
     // but I'm not sure if this is always correct...
     if (lowerCase.contains("law") || lowerCase.contains("au") ||
         lowerCase.contains("x-au"))
       {
         frameSize = (sampleSizeInBits >> 3) * channels;
         frameRate = sampleRate;
       }
     else if (lowerCase.contains("wav"))
       {
         frameSize = ((sampleSizeInBits + 7) / 8) * channels;
         frameRate = sampleRate;
       }
     else if (lowerCase.contains("iff"))
       {
         frameSize = (sampleSizeInBits * channels) / 8;
         frameRate = sampleRate;
       }

     // write all the additional properties we got to identify
     // the gstreamer plugin actually used to deal with this stream
     Map<String, Object> properties = new HashMap<String, Object>();
     properties.put(GStreamerMixer.GST_BACKEND, true);
     properties.put(GStreamerMixer.GST_DECODER, header.name);

     /* now we put in some of the additional properties if we have them */
     if (header.type != null) properties.put("type", header.type);
     if (header.framed != null) properties.put("framed", header.framed);
     if (header.bitrate != null) properties.put("bitrate", header.bitrate);
     if (header.isSigned != null) properties.put("isSigned", header.isSigned);
     if (header.depth != null) properties.put("depth", header.depth);
     if (header.mimetype != null) properties.put("mimetype", header.mimetype);

     AudioFormat format = new AudioFormat(encoding,
                                          sampleRate,
                                          sampleSizeInBits,
                                          channels,
                                          frameSize,
                                          frameRate,
                                          bigEndian,
                                          properties);
     return format;
   }

   /* ***** native methods ***** */

   /**
    * Retrieve header information about the file being played.
    *
    * @param info
    * @return
    */
   native static final
   protected boolean gstreamer_get_audio_format_stream(GstHeader info,
                                                BufferedInputStream istream);

   /**
    * Retrieve header information about the file being played.
    *
    * @param info
    * @return
    */
   native static final
   protected boolean gstreamer_get_audio_format_file(GstHeader info);

   static
   {
     System.loadLibrary("gstreamerpeer"); //$NON-NLS-1$
   }
 }
	/*GstAudioFileReaderNativePeer -- GNU Classpath GStreamer AudioFileReader
	native peer class.
	Copyright (C) 2007 Free Software Foundation, Inc.

	This file is part of GNU Classpath.

	GNU Classpath 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 2, or (at your option)
	any later version.

	GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301 USA.

	Linking this library statically or dynamically with other modules is
	making a combined work based on this library. Thus, the terms and
	conditions of the GNU General Public License cover the whole
	combination.

	As a special exception, the copyright holders of this library give you
	permission to link this library with independent modules to produce an
	executable, regardless of the license terms of these independent
	modules, and to copy and distribute the resulting executable under
	terms of your choice, provided that you also meet, for each linked
	independent module, the terms and conditions of the license of that
	module. An independent module is a module which is not derived from
	or based on this library. If you modify this library, you may extend
	this exception to your version of the library, but you are not
	obligated to do so. If you do not wish to do so, delete this
	exception statement from your version. */

	package gnu.javax.sound.sampled.gstreamer.io;

	import gnu.javax.sound.sampled.gstreamer.GStreamerMixer;

	import java.io.BufferedInputStream;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.net.URL;
	import java.util.HashMap;
	import java.util.Map;

	import javax.sound.sampled.AudioFormat;
	import javax.sound.sampled.AudioSystem;
	import javax.sound.sampled.AudioFormat.Encoding;

	/**
	* GStreamer native peer for GstAudioFileReader.
	*
	* @author Mario Torre <neugens@limasoftware.net>
	*/
	final class GstAudioFileReaderNativePeer
	{
	private static final String GST_ENCODING = "GStreamer Generic Audio Reader";

	private static class GstHeader
	{
	/*
	* NOTE: these properties are accessed by the native code, be careful
	* if you change them.
	* Not all the fields are necessarily set.
	*
	*/
	public String file = null;

	public String suffix = null;

	public String name = null;

	public String mimetype = null;

	public String endianness = null;

	public String channels = null;

	public String rate = null;

	public String width = null;

	public String depth = null;

	public String isSigned = null;

	public String layer = null;
	public String bitrate = null;
	public String framed = null;
	public String type = null;
	}

	public static AudioFormat getAudioFormat(File file) throws Exception
	{
	GstHeader header = new GstHeader();
	header.file = file.getAbsolutePath();

	if (!gstreamer_get_audio_format_file(header))
	return null;

	return getAudioFormat(header);
	}

	public static AudioFormat getAudioFormat(InputStream is) throws Exception
	{
	GstHeader header = new GstHeader();

	BufferedInputStream stream = new BufferedInputStream(is);
	if(!stream.markSupported())
	throw new IOException("Stream must support marking.");

	stream.mark(0);

	if (!gstreamer_get_audio_format_stream(header, stream))
	return null;

	return getAudioFormat(header);
	}

	public static AudioFormat getAudioFormat(URL url) throws Exception
	{
	GstHeader header = new GstHeader();
	header.file = url.toExternalForm();

	BufferedInputStream stream = new BufferedInputStream(url.openStream());
	if(!stream.markSupported())
	throw new IOException("Stream must support marking.");

	stream.mark(0);

	if (!gstreamer_get_audio_format_stream(header, stream))
	return null;

	return getAudioFormat(header);
	}

	private static Encoding getEncoding(GstHeader header)
	{
	StringBuilder buffer = new StringBuilder();

	if (header.name == null)
	{
	buffer.append(GST_ENCODING);
	if (header.mimetype != null)
	{
	buffer.append(" ");
	buffer.append(header.mimetype);
	}

	header.name = buffer.toString();
	}
	else
	{
	// strip the "decoder" word from the name, if any
	// this is a bit ugly, the alternative would be to still output the
	// full name of the decoder/demuxer
	String lowerCase = header.name.toLowerCase();
	int index = lowerCase.indexOf("decoder");
	if (index == -1)
	{
	index = lowerCase.indexOf("demuxer");
	}

	if (index == -1)
	index = lowerCase.length();

	buffer.append(header.name.substring(0, index));

	}

	return new Encoding(buffer.toString().trim());
	}

	private static AudioFormat getAudioFormat(GstHeader header)
	throws Exception
	{
	int na = AudioSystem.NOT_SPECIFIED;

	/* we use mimetype as an header, but this could have some side effects */
	Encoding encoding = getEncoding(header);

	float sampleRate = ((header.rate != null) ?
	new Float(header.rate).floatValue() : na);

	int sampleSizeInBits = ((header.depth != null) ?
	new Integer(header.depth).intValue() : na);

	int channels = ((header.channels != null) ?
	new Integer(header.channels).intValue() : na);

	boolean bigEndian = false;
	if (header.endianness != null)
	{
	if (header.endianness.compareTo("4321") == 0)
	bigEndian = true;
	}

	int frameSize = na;
	float frameRate = na;
	String lowerCase = header.name.toLowerCase();

	// FIXME: frameRate = sampleRate in these cases under all the tests so far
	// but I'm not sure if this is always correct...
	if (lowerCase.contains("law") \|\| lowerCase.contains("au") \|\|
	lowerCase.contains("x-au"))
	{
	frameSize = (sampleSizeInBits >> 3) * channels;
	frameRate = sampleRate;
	}
	else if (lowerCase.contains("wav"))
	{
	frameSize = ((sampleSizeInBits + 7) / 8) * channels;
	frameRate = sampleRate;
	}
	else if (lowerCase.contains("iff"))
	{
	frameSize = (sampleSizeInBits * channels) / 8;
	frameRate = sampleRate;
	}

	// write all the additional properties we got to identify
	// the gstreamer plugin actually used to deal with this stream
	Map<String, Object> properties = new HashMap<String, Object>();
	properties.put(GStreamerMixer.GST_BACKEND, true);
	properties.put(GStreamerMixer.GST_DECODER, header.name);

	/* now we put in some of the additional properties if we have them */
	if (header.type != null) properties.put("type", header.type);
	if (header.framed != null) properties.put("framed", header.framed);
	if (header.bitrate != null) properties.put("bitrate", header.bitrate);
	if (header.isSigned != null) properties.put("isSigned", header.isSigned);
	if (header.depth != null) properties.put("depth", header.depth);
	if (header.mimetype != null) properties.put("mimetype", header.mimetype);

	AudioFormat format = new AudioFormat(encoding,
	sampleRate,
	sampleSizeInBits,
	channels,
	frameSize,
	frameRate,
	bigEndian,
	properties);
	return format;
	}

	/* *** native methods *** */

	/**
	* Retrieve header information about the file being played.
	*
	* @param info
	* @return
	*/
	native static final
	protected boolean gstreamer_get_audio_format_stream(GstHeader info,
	BufferedInputStream istream);

	/**
	* Retrieve header information about the file being played.
	*
	* @param info
	* @return
	*/
	native static final
	protected boolean gstreamer_get_audio_format_file(GstHeader info);

	static
	{
	System.loadLibrary("gstreamerpeer"); //$NON-NLS-1$
	}
	}