Hook it up.

Original commit message from CVS:
2006-02-05  Lutz Mueller <lutz@topfrose.de>

reviewed by: Andy Wingo <wingo@pobox.com>

* configure.ac:
* ext/Makefile.am: Hook it up.
* ext/bz2/gstbz2.c:
* ext/bz2/gstbz2dec.h:
* ext/bz2/gstbz2dec.c:
* ext/bz2/gstbz2enc.h:
* ext/bz2/gstbz2enc.c: New plugin, implements bz2 encoding and
decoding (#303167).

9 files changed, 701 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index c04933c8..3e75f5b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2006-02-05  Lutz Mueller <lutz@topfrose.de>
+
+	reviewed by: Andy Wingo <wingo@pobox.com>
+
+	* configure.ac:
+	* ext/Makefile.am: Hook it up.
+	* ext/bz2/gstbz2.c:
+	* ext/bz2/gstbz2dec.h:
+	* ext/bz2/gstbz2dec.c:
+	* ext/bz2/gstbz2enc.h:
+	* ext/bz2/gstbz2enc.c: New plugin, implements bz2 encoding and
+	decoding (#303167).
+	
 2006-01-30  Andy Wingo  <wingo@pobox.com>
 
 	* sys/glsink/Makefile.am (libgstglimagesink_la_LIBADD) 
diff --git a/configure.ac b/configure.ac
index 33106b4c..610a54be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -400,6 +400,13 @@ else
   AC_SUBST(X_LIBS)
 fi
 
+dnl *** BZ2 ***
+translit(bz2, m, l) AM_CONDITIONAL(USE_BZ2, true)
+GST_CHECK_FEATURE(BZ2, [bz2 library], bz2, [
+  GST_CHECK_LIBHEADER(BZ2, bz2, BZ2_bzCompress, ,bzlib.h, BZ2_LIBS="-lbz2")
+  AC_SUBST(BZ2_LIBS)
+])
+
 dnl *** DTS ***
 translit(dnm, m, l) AM_CONDITIONAL(USE_DTS, true)
 GST_CHECK_FEATURE(DTS, [dts library], dtsdec, [
@@ -652,6 +659,7 @@ sys/glsink/Makefile
 examples/Makefile
 examples/directfb/Makefile
 ext/Makefile
+ext/bz2/Makefile
 ext/directfb/Makefile
 ext/faac/Makefile
 ext/faad/Makefile
diff --git a/ext/Makefile.am b/ext/Makefile.am
index 531326ef..78d95ac7 100644
--- a/ext/Makefile.am
+++ b/ext/Makefile.am
@@ -22,6 +22,12 @@ AUDIOFILE_DIR=
 AUDIORESAMPLE_DIR=
 # endif
 
+if USE_BZ2
+BZ2_DIR=bz2
+else
+BZ2_DIR=
+endif
+
 # if USE_CDAUDIO
 # CDAUDIO_DIR=cdaudio
 # else
@@ -207,6 +213,7 @@ SUBDIRS=\
 	$(ARTSC_DIR) \
 	$(AUDIOFILE_DIR) \
 	$(AUDIORESAMPLE_DIR) \
+	$(BZ2_DIR) \
 	$(CDAUDIO_DIR) \
 	$(DIRAC_DIR) \
 	$(DIRECTFB_DIR) \
@@ -239,6 +246,7 @@ SUBDIRS=\
 	$(XVID_DIR)
 
 DIST_SUBDIRS= \
+	bz2 \
 	directfb \
 	faac \
 	faad \
diff --git a/ext/bz2/Makefile.am b/ext/bz2/Makefile.am
new file mode 100644
index 00000000..736351e3
--- /dev/null
+++ b/ext/bz2/Makefile.am
@@ -0,0 +1,11 @@
+
+plugin_LTLIBRARIES = libgstbz2.la
+
+libgstbz2_la_SOURCES = \
+	gstbz2.c gstbz2dec.c gstbz2enc.c
+libgstbz2_la_CFLAGS = $(GST_CFLAGS)
+libgstbz2_la_LIBADD = $(BZ2_LIBS) 
+libgstbz2_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = \
+	gstbz2dec.h gstbz2enc.h
diff --git a/ext/bz2/gstbz2.c b/ext/bz2/gstbz2.c
new file mode 100644
index 00000000..42a74b41
--- /dev/null
+++ b/ext/bz2/gstbz2.c
@@ -0,0 +1,41 @@
+/* GStreamer
+ *
+ * This library 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 library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstbz2enc.h"
+#include "gstbz2dec.h"
+
+#include <gst/gstplugin.h>
+
+#include <string.h>
+
+static gboolean
+plugin_init (GstPlugin * p)
+{
+  if (!gst_element_register (p, "bz2enc", GST_RANK_NONE, GST_TYPE_BZ2ENC))
+    return FALSE;
+  if (!gst_element_register (p, "bz2dec", GST_RANK_NONE, GST_TYPE_BZ2DEC))
+    return FALSE;
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "bz2",
+    "Compress or decompress streams",
+    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
diff --git a/ext/bz2/gstbz2dec.c b/ext/bz2/gstbz2dec.c
new file mode 100644
index 00000000..561cc408
--- /dev/null
+++ b/ext/bz2/gstbz2dec.c
@@ -0,0 +1,239 @@
+/* GStreamer
+ *
+ * This library 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 library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "gstbz2dec.h"
+
+#include <bzlib.h>
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (bz2dec_debug);
+#define GST_CAT_DEFAULT bz2dec_debug
+
+static GstElementDetails bz2dec_details = GST_ELEMENT_DETAILS ("BZ2 decoder",
+    "Codec/Decoder", "Decodes compressed streams",
+    "Lutz Mueller <lutz@users.sourceforge.net>");
+
+static GstStaticPadTemplate sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-bz2"));
+static GstStaticPadTemplate src_template =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/octet-stream"));
+
+struct _GstBz2dec
+{
+  GstElement parent;
+
+  /* Properties */
+  guint buffer_size;
+
+  gboolean ready;
+  bz_stream stream;
+  guint64 offset;
+};
+
+struct _GstBz2decClass
+{
+  GstElementClass parent_class;
+};
+
+GST_BOILERPLATE (GstBz2dec, gst_bz2dec, GstElement, GST_TYPE_ELEMENT);
+
+#define DEFAULT_BUFFER_SIZE 1024
+
+enum
+{
+  PROP_0,
+  PROP_BUFFER_SIZE
+};
+
+static void
+gst_bz2dec_decompress_end (GstBz2dec * b)
+{
+  g_return_if_fail (GST_IS_BZ2DEC (b));
+
+  if (b->ready) {
+    BZ2_bzDecompressEnd (&b->stream);
+    memset (&b->stream, 0, sizeof (b->stream));
+    b->ready = FALSE;
+  }
+}
+
+static void
+gst_bz2dec_decompress_init (GstBz2dec * b)
+{
+  g_return_if_fail (GST_IS_BZ2DEC (b));
+
+  gst_bz2dec_decompress_end (b);
+  b->offset = 0;
+  switch (BZ2_bzDecompressInit (&b->stream, 0, 0)) {
+    case BZ_OK:
+      b->ready = TRUE;
+      return;
+    default:
+      b->ready = FALSE;
+      GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL),
+          ("Failed to start decompression."));
+      return;
+  }
+}
+
+static GstFlowReturn
+gst_bz2dec_chain (GstPad * pad, GstBuffer * in)
+{
+  GstBz2dec *b = GST_BZ2DEC (gst_pad_get_parent (pad));
+  GstPad *src = gst_element_get_pad (GST_ELEMENT (b), "src");
+  int r = BZ_OK;
+  GstFlowReturn fr;
+  guint n;
+
+  gst_object_unref (b);
+  gst_object_unref (src);
+  if (!b->ready) {
+    GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL), ("Decompressor not ready."));
+    return GST_FLOW_ERROR;
+  }
+
+  b->stream.next_in = (char *) GST_BUFFER_DATA (in);
+  b->stream.avail_in = GST_BUFFER_SIZE (in);
+
+  while (r != BZ_STREAM_END) {
+    GstBuffer *out;
+
+    if ((fr = gst_pad_alloc_buffer (src, b->offset, b->buffer_size,
+                GST_PAD_CAPS (pad), &out)) != GST_FLOW_OK) {
+      gst_bz2dec_decompress_init (b);
+      return fr;
+    }
+    b->stream.next_out = (char *) GST_BUFFER_DATA (out);
+    b->stream.avail_out = GST_BUFFER_SIZE (out);
+    r = BZ2_bzDecompress (&b->stream);
+    if ((r != BZ_OK) && (r != BZ_STREAM_END)) {
+      GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
+          ("Failed to decompress data (error code %i).", r));
+      gst_bz2dec_decompress_init (b);
+      gst_buffer_unref (out);
+      return GST_FLOW_ERROR;
+    }
+    if (b->stream.avail_out >= GST_BUFFER_SIZE (out)) {
+      gst_buffer_unref (out);
+      break;
+    }
+    GST_BUFFER_SIZE (out) -= b->stream.avail_out;
+    GST_BUFFER_OFFSET (out) = b->stream.total_out_lo32 - GST_BUFFER_SIZE (out);
+    n = GST_BUFFER_SIZE (out);
+    if ((fr = gst_pad_push (src, out)) != GST_FLOW_OK) {
+      gst_buffer_unref (out);
+      return fr;
+    }
+    b->offset += n;
+  }
+  gst_buffer_unref (in);
+  return GST_FLOW_OK;
+}
+
+static void
+gst_bz2dec_init (GstBz2dec * b, GstBz2decClass * klass)
+{
+  GstPad *pad;
+
+  b->buffer_size = DEFAULT_BUFFER_SIZE;
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_pad_set_chain_function (pad, gst_bz2dec_chain);
+  gst_element_add_pad (GST_ELEMENT (b), pad);
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_element_add_pad (GST_ELEMENT (b), pad);
+
+  gst_bz2dec_decompress_init (b);
+}
+
+static void
+gst_bz2dec_base_init (gpointer g_class)
+{
+  GstElementClass *ec = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (ec,
+      gst_static_pad_template_get (&sink_template));
+  gst_element_class_add_pad_template (ec,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_set_details (ec, &bz2dec_details);
+}
+
+static void
+gst_bz2dec_finalize (GObject * object)
+{
+  GstBz2dec *b = GST_BZ2DEC (object);
+
+  gst_bz2dec_decompress_end (b);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_bz2dec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstBz2dec *b = GST_BZ2DEC (object);
+
+  switch (prop_id) {
+    case PROP_BUFFER_SIZE:
+      g_value_set_uint (value, b->buffer_size);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+gst_bz2dec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstBz2dec *b = GST_BZ2DEC (object);
+
+  switch (prop_id) {
+    case PROP_BUFFER_SIZE:
+      b->buffer_size = g_value_get_uint (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+gst_bz2dec_class_init (GstBz2decClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gobject_class->finalize = gst_bz2dec_finalize;
+  gobject_class->get_property = gst_bz2dec_get_property;
+  gobject_class->set_property = gst_bz2dec_set_property;
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
+      g_param_spec_uint ("buffer_size", "Buffer size", "Buffer size",
+          1, G_MAXUINT, DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE));
+
+  GST_DEBUG_CATEGORY_INIT (bz2dec_debug, "bz2dec", 0, "BZ2 decompressor");
+}
diff --git a/ext/bz2/gstbz2dec.h b/ext/bz2/gstbz2dec.h
new file mode 100644
index 00000000..3366d85e
--- /dev/null
+++ b/ext/bz2/gstbz2dec.h
@@ -0,0 +1,38 @@
+/* bz2dec: Encoder plugin for GStreamer
+ *
+ * This library 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 library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_BZ2DEC_H_
+#define __GST_BZ2DEC_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_BZ2DEC            (gst_bz2dec_get_type())
+#define GST_BZ2DEC(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BZ2DEC,GstBz2dec))
+#define GST_BZ2DEC_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BZ2DEC,GstBz2dec))
+#define GST_IS_BZ2DEC(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BZ2DEC))
+#define GST_IS_BZ2DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BZ2DEC))
+typedef struct _GstBz2dec GstBz2dec;
+typedef struct _GstBz2decClass GstBz2decClass;
+
+GType
+gst_bz2dec_get_type (void)
+    G_GNUC_CONST;
+
+G_END_DECLS
+#endif /* __GST_BZ2DEC_H__ */
diff --git a/ext/bz2/gstbz2enc.c b/ext/bz2/gstbz2enc.c
new file mode 100644
index 00000000..c4a6d503
--- /dev/null
+++ b/ext/bz2/gstbz2enc.c
@@ -0,0 +1,305 @@
+/* GStreamer
+ *
+ * This library 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 library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "gstbz2enc.h"
+
+#include <bzlib.h>
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (bz2enc_debug);
+#define GST_CAT_DEFAULT bz2enc_debug
+
+static GstElementDetails bz2enc_details = GST_ELEMENT_DETAILS ("BZ2 encoder",
+    "Codec/Encoder", "Compresses streams",
+    "Lutz Mueller <lutz@users.sourceforge.net>");
+
+static GstStaticPadTemplate sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/octet-stream"));
+static GstStaticPadTemplate src_template =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-bz2"));
+
+#define DEFAULT_BLOCK_SIZE 6
+#define DEFAULT_BUFFER_SIZE 1024
+
+enum
+{
+  PROP_0,
+  PROP_BLOCK_SIZE,
+  PROP_BUFFER_SIZE
+};
+
+struct _GstBz2enc
+{
+  GstElement parent;
+
+  /* Properties */
+  guint block_size;
+  guint buffer_size;
+
+  gboolean ready;
+  bz_stream stream;
+  guint64 offset;
+};
+
+struct _GstBz2encClass
+{
+  GstElementClass parent_class;
+};
+
+GST_BOILERPLATE (GstBz2enc, gst_bz2enc, GstElement, GST_TYPE_ELEMENT);
+
+static void
+gst_bz2enc_compress_end (GstBz2enc * b)
+{
+  g_return_if_fail (GST_IS_BZ2ENC (b));
+
+  if (b->ready) {
+    BZ2_bzCompressEnd (&b->stream);
+    memset (&b->stream, 0, sizeof (b->stream));
+    b->ready = FALSE;
+  }
+}
+
+static void
+gst_bz2enc_compress_init (GstBz2enc * b)
+{
+  g_return_if_fail (GST_IS_BZ2ENC (b));
+
+  gst_bz2enc_compress_end (b);
+  b->offset = 0;
+  switch (BZ2_bzCompressInit (&b->stream, b->block_size, 0, 0)) {
+    case BZ_OK:
+      b->ready = TRUE;
+      return;
+    default:
+      b->ready = FALSE;
+      GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL),
+          ("Failed to start compression."));
+      return;
+  }
+}
+
+static gboolean
+gst_bz2enc_event (GstPad * pad, GstEvent * e)
+{
+  GstBz2enc *b = GST_BZ2ENC (gst_pad_get_parent (pad));
+  GstPad *src = gst_element_get_pad (GST_ELEMENT (b), "src");
+  int r = BZ_FINISH_OK;
+  GstFlowReturn fr;
+
+  gst_object_unref (b);
+  gst_object_unref (src);
+  switch (GST_EVENT_TYPE (e)) {
+    case GST_EVENT_EOS:
+      while (r != BZ_STREAM_END) {
+        GstBuffer *out;
+
+        if ((fr = gst_pad_alloc_buffer (src, b->offset, b->buffer_size,
+                    GST_PAD_CAPS (src), &out)) != GST_FLOW_OK) {
+          GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
+              ("Failed to allocate buffer of size %i.", b->buffer_size));
+          break;
+        }
+        b->stream.next_out = (char *) GST_BUFFER_DATA (out);
+        b->stream.avail_out = GST_BUFFER_SIZE (out);
+        r = BZ2_bzCompress (&b->stream, BZ_FINISH);
+        if ((r != BZ_FINISH_OK) && (r != BZ_STREAM_END)) {
+          GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
+              ("Failed to finish to compress (error code %i).", r));
+          gst_buffer_unref (out);
+          break;
+        }
+        if (b->stream.avail_out >= GST_BUFFER_SIZE (out)) {
+          gst_buffer_unref (out);
+          break;
+        }
+        GST_BUFFER_SIZE (out) -= b->stream.avail_out;
+        GST_BUFFER_OFFSET (out) =
+            b->stream.total_out_lo32 - GST_BUFFER_SIZE (out);
+        if ((fr = gst_pad_push (src, out)) != GST_FLOW_OK) {
+          GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
+              ("Could not push last packet (error code %i).", r));
+          gst_buffer_unref (out);
+          break;
+        }
+      }
+      gst_bz2enc_compress_init (b);
+      break;
+    default:
+      break;
+  }
+  return gst_pad_event_default (pad, e);
+}
+
+static GstFlowReturn
+gst_bz2enc_chain (GstPad * pad, GstBuffer * in)
+{
+  GstBz2enc *b = GST_BZ2ENC (gst_pad_get_parent (pad));
+  GstPad *src = gst_element_get_pad (GST_ELEMENT (b), "src");
+  GstFlowReturn fr = GST_FLOW_OK;
+  guint n;
+
+  gst_object_unref (b);
+  gst_object_unref (src);
+  if (!b->ready) {
+    GST_ELEMENT_ERROR (b, CORE, FAILED, (NULL), ("Compressor not ready."));
+    return GST_FLOW_ERROR;
+  }
+
+  b->stream.next_in = (char *) GST_BUFFER_DATA (in);
+  b->stream.avail_in = GST_BUFFER_SIZE (in);
+  while ((fr == GST_FLOW_OK) && b->stream.avail_in) {
+    GstBuffer *out;
+    int r;
+
+    if ((fr = gst_pad_alloc_buffer (src, b->offset, b->buffer_size,
+                GST_PAD_CAPS (pad), &out)) != GST_FLOW_OK) {
+      gst_bz2enc_compress_init (b);
+      return fr;
+    }
+    b->stream.next_out = (char *) GST_BUFFER_DATA (out);
+    b->stream.avail_out = GST_BUFFER_SIZE (out);
+    r = BZ2_bzCompress (&b->stream, BZ_RUN);
+    if (r != BZ_RUN_OK) {
+      GST_ELEMENT_ERROR (b, STREAM, DECODE, (NULL),
+          ("Failed to compress data (error code %i).", r));
+      gst_bz2enc_compress_init (b);
+      gst_buffer_unref (out);
+      return GST_FLOW_ERROR;
+    }
+    if (b->stream.avail_out >= GST_BUFFER_SIZE (out)) {
+      gst_buffer_unref (out);
+      break;
+    }
+    GST_BUFFER_SIZE (out) -= b->stream.avail_out;
+    GST_BUFFER_OFFSET (out) = b->stream.total_out_lo32 - GST_BUFFER_SIZE (out);
+    n = GST_BUFFER_SIZE (out);
+    if ((fr = gst_pad_push (src, out)) != GST_FLOW_OK) {
+      gst_buffer_unref (out);
+      return fr;
+    }
+    b->offset += n;
+  }
+  gst_buffer_unref (in);
+  return GST_FLOW_OK;
+}
+
+static void
+gst_bz2enc_init (GstBz2enc * b, GstBz2encClass * klass)
+{
+  GstPad *pad;
+
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_pad_set_chain_function (pad, gst_bz2enc_chain);
+  gst_pad_set_event_function (pad, gst_bz2enc_event);
+  gst_element_add_pad (GST_ELEMENT (b), pad);
+  pad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_element_add_pad (GST_ELEMENT (b), pad);
+
+  b->block_size = DEFAULT_BLOCK_SIZE;
+  b->buffer_size = DEFAULT_BUFFER_SIZE;
+  gst_bz2enc_compress_init (b);
+}
+
+static void
+gst_bz2enc_base_init (gpointer g_class)
+{
+  GstElementClass *ec = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (ec,
+      gst_static_pad_template_get (&sink_template));
+  gst_element_class_add_pad_template (ec,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_set_details (ec, &bz2enc_details);
+}
+
+static void
+gst_bz2enc_finalize (GObject * object)
+{
+  GstBz2enc *b = GST_BZ2ENC (object);
+
+  gst_bz2enc_compress_end (b);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_bz2enc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstBz2enc *b = GST_BZ2ENC (object);
+
+  switch (prop_id) {
+    case PROP_BLOCK_SIZE:
+      g_value_set_uint (value, b->block_size);
+      break;
+    case PROP_BUFFER_SIZE:
+      g_value_set_uint (value, b->buffer_size);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+gst_bz2enc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstBz2enc *b = GST_BZ2ENC (object);
+
+  switch (prop_id) {
+    case PROP_BLOCK_SIZE:
+      b->block_size = g_value_get_uint (value);
+      gst_bz2enc_compress_init (b);
+      break;
+    case PROP_BUFFER_SIZE:
+      b->buffer_size = g_value_get_uint (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+gst_bz2enc_class_init (GstBz2encClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gobject_class->finalize = gst_bz2enc_finalize;
+  gobject_class->set_property = gst_bz2enc_set_property;
+  gobject_class->get_property = gst_bz2enc_get_property;
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BLOCK_SIZE,
+      g_param_spec_uint ("block_size", "Block size", "Block size",
+          1, 9, DEFAULT_BLOCK_SIZE, G_PARAM_READWRITE));
+  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
+      g_param_spec_uint ("buffer_size", "Buffer size", "Buffer size",
+          1, G_MAXUINT, DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE));
+
+  GST_DEBUG_CATEGORY_INIT (bz2enc_debug, "bz2enc", 0, "BZ2 compressor");
+}
diff --git a/ext/bz2/gstbz2enc.h b/ext/bz2/gstbz2enc.h
new file mode 100644
index 00000000..d93cf4bd
--- /dev/null
+++ b/ext/bz2/gstbz2enc.h
@@ -0,0 +1,38 @@
+/* bz2enc: Encoder plugin for GStreamer
+ *
+ * This library 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 library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_BZ2ENC_H_
+#define __GST_BZ2ENC_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_BZ2ENC            (gst_bz2enc_get_type())
+#define GST_BZ2ENC(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BZ2ENC,GstBz2enc))
+#define GST_BZ2ENC_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BZ2ENC,GstBz2enc))
+#define GST_IS_BZ2ENC(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BZ2ENC))
+#define GST_IS_BZ2ENC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BZ2ENC))
+typedef struct _GstBz2enc GstBz2enc;
+typedef struct _GstBz2encClass GstBz2encClass;
+
+GType
+gst_bz2enc_get_type (void)
+    G_GNUC_CONST;
+
+G_END_DECLS
+#endif /* __GST_BZ2ENC_H__ */