1 files changed, 119 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/sound/sampled/gstreamer/io/GstInputStream.java b/libjava/classpath/gnu/javax/sound/sampled/gstreamer/io/GstInputStream.java
new file mode 100644
index 000000000..56bddcaad
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+++ b/libjava/classpath/gnu/javax/sound/sampled/gstreamer/io/GstInputStream.java
@@ -0,0 +1,119 @@
+/* GstInputStream.java -- Trampoline class for an InputStream, mean to be used
+ by native code.
+ 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.classpath.Pointer;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Encapsulates the functionality of an InputStream Object.
+ *
+ * This class is only meant to be used by the native code, to allow reading
+ * of the given InputStream as part of a the GStreamer InputStream Source
+ * Plugin.
+ *
+ * <strong>Note:</strong> this class will be not garbage collected as the
+ * native code contains strong references to internal fields.
+ * The native layer provides a method that can be called by the C code to
+ * free the resources and to let the garbage collected to handle this class
+ * when not needed anymore.
+ *
+ * @author Mario Torre <neugens@limasoftware.net>
+ */
+public class GstInputStream
+{
+  /** The real InputStream on which to perform reading operations. */
+  private InputStream istream;
+
+  /**
+   * Initialized in the native code, don't change without changes
+   * in the native layer.
+   */
+  private Pointer gstInputStream = null;
+
+  public GstInputStream(InputStream istream)
+  {
+    this.istream = istream;
+    init_instance();
+  }
+
+  public int read(byte[] buf, int off, int len) throws IOException
+  {
+    return this.istream.read(buf, off, len);
+  }
+
+  public int available() throws IOException
+  {
+    return this.istream.available();
+  }
+
+  /**
+   * Return a reference to the GstInputStream native class as a Pointer object.
+   * This method is intended as an helper accessor and the returned pointer
+   * needs to be casted and used in the native code only.
+   *
+   * @return Pointer to the native GstInputStream class.
+   */
+  public Pointer getNativeClass()
+  {
+    return this.gstInputStream;
+  }
+
+  /* native methods */
+
+  /**
+   * Initialize the native peer and enables the object cache.
+   * It is meant to be used by the class constructor.
+   */
+  native private final void init_instance();
+
+  /**
+   * Initialize the native peer and enables the object cache.
+   * It is meant to be used by the static initializer.
+   */
+  native private static final void init_id_cache();
+
+  static
+  {
+    System.loadLibrary("gstreamerpeer"); //$NON-NLS-1$
+    init_id_cache();
+  }
+}