Add patch from Bug 357055 from Chris Lord, adding support for Vorbis streams

Original commit message from CVS:
Add patch from Bug 357055 from Chris Lord, adding support for Vorbis streams

6 files changed, 1328 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 90d906e8..2ea8c2c7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2007-03-01  Chris Lord <chris@openedhand.com>
+
+	Reviewed by Christian Schaller <christian@fluendo.com>
+
+	Fixes Bug 357055
+	* ext/ivorbis/Makefile.am:
+	* ext/ivorbis/vorbisdec.c: Add support for Vorbis streams
+	* ext/ivorbis/vorbisdec.h
+	* ext/ivorbis/vorbis.c :
+
 2007-03-01  Jan Schmidt  <thaytan@mad.scientist.com>
 
 	* tests/check/Makefile.am:
diff --git a/configure.ac b/configure.ac
index 8d936179..8ed77edb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -615,7 +615,12 @@ AG_GST_CHECK_FEATURE(IVORBIS, [integer vorbis plug-in], ivorbisdec, [
   IVORBIS_CFLAGS=
   AC_CHECK_LIB(vorbisidec, vorbis_block_init,
     [IVORBIS_LIBS=-lvorbisidec
-     HAVE_IVORBIS=yes],
+     HAVE_IVORBIS=yes
+     case $host in 
+     arm-*-*)
+       IVORBIS_CFLAGS="-D_ARM_ASSEM_ $IVORBIS_CFLAGS"
+     esac
+    ],
     HAVE_IVORBIS=no)
   AC_SUBST(IVORBIS_LIBS)
   AC_SUBST(IVORBIS_CFLAGS)
diff --git a/ext/ivorbis/Makefile.am b/ext/ivorbis/Makefile.am
index 13ef42ed..1098f72f 100644
--- a/ext/ivorbis/Makefile.am
+++ b/ext/ivorbis/Makefile.am
@@ -1,7 +1,7 @@
 
 plugin_LTLIBRARIES = libgstivorbis.la
 
-libgstivorbis_la_SOURCES = vorbis.c vorbisfile.c
+libgstivorbis_la_SOURCES = vorbis.c vorbisfile.c vorbisdec.c
 libgstivorbis_la_CFLAGS = $(GST_CFLAGS) $(IVORBIS_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
 libgstivorbis_la_LIBADD = $(IVORBIS_LIBS)		\
 			  $(IVORBISFILE_LIBS)		\
diff --git a/ext/ivorbis/vorbis.c b/ext/ivorbis/vorbis.c
index ea2c675f..368b7f39 100644
--- a/ext/ivorbis/vorbis.c
+++ b/ext/ivorbis/vorbis.c
@@ -23,9 +23,11 @@
 
 #include <gst/gst.h>
 #include <tremor/ivorbiscodec.h>
+#include "vorbisdec.h"
 
-extern GType ivorbisfile_get_type (void);
+GST_DEBUG_CATEGORY (vorbisdec_debug);
 
+extern GType ivorbisfile_get_type (void);
 
 static gboolean
 plugin_init (GstPlugin * plugin)
@@ -34,6 +36,13 @@ plugin_init (GstPlugin * plugin)
           ivorbisfile_get_type ()))
     return FALSE;
 
+  if (!gst_element_register (plugin, "ivorbisdec", GST_RANK_SECONDARY,
+          gst_ivorbis_dec_get_type ()))
+    return FALSE;
+
+  GST_DEBUG_CATEGORY_INIT (vorbisdec_debug, "ivorbisdec", 0,
+      "vorbis decoding element (integer decoder)");
+
   return TRUE;
 }
 
diff --git a/ext/ivorbis/vorbisdec.c b/ext/ivorbis/vorbisdec.c
new file mode 100644
index 00000000..4d051f06
--- /dev/null
+++ b/ext/ivorbis/vorbisdec.c
@@ -0,0 +1,1214 @@
+/* GStreamer
+ * Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
+ *
+ * Tremor modifications <2006>:
+ *   Chris Lord, OpenedHand Ltd. <chris@openedhand.com>, http://www.o-hand.com/
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-vorbisdec
+ * @short_description: a decoder that decodes Vorbis to raw audio
+ * @see_also: vorbisenc, oggdemux
+ *
+ * <refsect2>
+ * <para>
+ * This element decodes a Vorbis stream to raw int audio.
+ * <ulink url="http://www.vorbis.com/">Vorbis</ulink> is a royalty-free
+ * audio codec maintained by the <ulink url="http://www.xiph.org/">Xiph.org
+ * Foundation</ulink>.
+ * </para>
+ * <title>Example pipelines</title>
+ * <para>
+ * <programlisting>
+ * gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisdec ! audioconvert ! alsasink
+ * </programlisting>
+ * Decode an Ogg/Vorbis. To create an Ogg/Vorbis file refer to the documentation of vorbisenc.
+ * </para>
+ * </refsect2>
+ *
+ * Last reviewed on 2006-03-01 (0.10.4)
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "vorbisdec.h"
+#include <string.h>
+#include <gst/audio/audio.h>
+#include <gst/tag/tag.h>
+#include <gst/audio/multichannel.h>
+
+GST_DEBUG_CATEGORY_EXTERN (vorbisdec_debug);
+#define GST_CAT_DEFAULT vorbisdec_debug
+
+static const GstElementDetails vorbis_dec_details =
+GST_ELEMENT_DETAILS ("Vorbis audio decoder",
+    "Codec/Decoder/Audio",
+    "decode raw vorbis streams to integer audio",
+    "Benjamin Otte <in7y118@public.uni-hamburg.de>\n"
+    "Chris Lord <chris@openedhand.com>");
+
+static GstStaticPadTemplate vorbis_dec_src_factory =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "rate = (int) [ 1, MAX ], "
+        "channels = (int) [ 1, 6 ], "
+        "endianness = (int) BYTE_ORDER, "
+        "width = (int) 32, " "depth = (int) 16, " "signed = (boolean) true")
+    );
+
+static GstStaticPadTemplate vorbis_dec_sink_factory =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-vorbis")
+    );
+
+GST_BOILERPLATE (GstIVorbisDec, gst_ivorbis_dec, GstElement, GST_TYPE_ELEMENT);
+
+static void vorbis_dec_finalize (GObject * object);
+static gboolean vorbis_dec_sink_event (GstPad * pad, GstEvent * event);
+static GstFlowReturn vorbis_dec_chain (GstPad * pad, GstBuffer * buffer);
+static GstStateChangeReturn vorbis_dec_change_state (GstElement * element,
+    GstStateChange transition);
+
+static gboolean vorbis_dec_src_event (GstPad * pad, GstEvent * event);
+static gboolean vorbis_dec_src_query (GstPad * pad, GstQuery * query);
+static gboolean vorbis_dec_convert (GstPad * pad,
+    GstFormat src_format, gint64 src_value,
+    GstFormat * dest_format, gint64 * dest_value);
+
+static gboolean vorbis_dec_sink_query (GstPad * pad, GstQuery * query);
+
+static void
+gst_ivorbis_dec_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+  GstPadTemplate *src_template, *sink_template;
+
+  src_template = gst_static_pad_template_get (&vorbis_dec_src_factory);
+  gst_element_class_add_pad_template (element_class, src_template);
+
+  sink_template = gst_static_pad_template_get (&vorbis_dec_sink_factory);
+  gst_element_class_add_pad_template (element_class, sink_template);
+
+  gst_element_class_set_details (element_class, &vorbis_dec_details);
+}
+
+static void
+gst_ivorbis_dec_class_init (GstIVorbisDecClass * klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+  gobject_class->finalize = vorbis_dec_finalize;
+
+  gstelement_class->change_state = GST_DEBUG_FUNCPTR (vorbis_dec_change_state);
+}
+
+static const GstQueryType *
+vorbis_get_query_types (GstPad * pad)
+{
+  static const GstQueryType vorbis_dec_src_query_types[] = {
+    GST_QUERY_POSITION,
+    GST_QUERY_DURATION,
+    GST_QUERY_CONVERT,
+    0
+  };
+
+  return vorbis_dec_src_query_types;
+}
+
+static void
+gst_ivorbis_dec_init (GstIVorbisDec * dec, GstIVorbisDecClass * g_class)
+{
+  dec->sinkpad = gst_pad_new_from_static_template (&vorbis_dec_sink_factory,
+      "sink");
+
+  gst_pad_set_event_function (dec->sinkpad,
+      GST_DEBUG_FUNCPTR (vorbis_dec_sink_event));
+  gst_pad_set_chain_function (dec->sinkpad,
+      GST_DEBUG_FUNCPTR (vorbis_dec_chain));
+  gst_pad_set_query_function (dec->sinkpad,
+      GST_DEBUG_FUNCPTR (vorbis_dec_sink_query));
+  gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
+
+  dec->srcpad = gst_pad_new_from_static_template (&vorbis_dec_src_factory,
+      "src");
+
+  gst_pad_set_event_function (dec->srcpad,
+      GST_DEBUG_FUNCPTR (vorbis_dec_src_event));
+  gst_pad_set_query_type_function (dec->srcpad,
+      GST_DEBUG_FUNCPTR (vorbis_get_query_types));
+  gst_pad_set_query_function (dec->srcpad,
+      GST_DEBUG_FUNCPTR (vorbis_dec_src_query));
+  gst_pad_use_fixed_caps (dec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
+
+  dec->queued = NULL;
+  dec->pendingevents = NULL;
+  dec->taglist = NULL;
+}
+
+static void
+vorbis_dec_finalize (GObject * object)
+{
+  /* Release any possibly allocated libvorbis data.
+   * _clear functions can safely be called multiple times
+   */
+  GstIVorbisDec *vd = GST_IVORBIS_DEC (object);
+
+  vorbis_block_clear (&vd->vb);
+  vorbis_dsp_clear (&vd->vd);
+  vorbis_comment_clear (&vd->vc);
+  vorbis_info_clear (&vd->vi);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_ivorbis_dec_reset (GstIVorbisDec * dec)
+{
+  GList *walk;
+
+  dec->cur_timestamp = GST_CLOCK_TIME_NONE;
+  dec->prev_timestamp = GST_CLOCK_TIME_NONE;
+  dec->granulepos = -1;
+  dec->discont = TRUE;
+  gst_segment_init (&dec->segment, GST_FORMAT_TIME);
+
+  for (walk = dec->queued; walk; walk = g_list_next (walk)) {
+    gst_buffer_unref (GST_BUFFER_CAST (walk->data));
+  }
+  g_list_free (dec->queued);
+  dec->queued = NULL;
+
+  for (walk = dec->pendingevents; walk; walk = g_list_next (walk)) {
+    gst_event_unref (GST_EVENT_CAST (walk->data));
+  }
+  g_list_free (dec->pendingevents);
+  dec->pendingevents = NULL;
+
+  if (dec->taglist)
+    gst_tag_list_free (dec->taglist);
+  dec->taglist = NULL;
+}
+
+
+static gboolean
+vorbis_dec_convert (GstPad * pad,
+    GstFormat src_format, gint64 src_value,
+    GstFormat * dest_format, gint64 * dest_value)
+{
+  gboolean res = TRUE;
+  GstIVorbisDec *dec;
+  guint64 scale = 1;
+
+  if (src_format == *dest_format) {
+    *dest_value = src_value;
+    return TRUE;
+  }
+
+  dec = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  if (!dec->initialized)
+    goto no_header;
+
+  if (dec->sinkpad == pad &&
+      (src_format == GST_FORMAT_BYTES || *dest_format == GST_FORMAT_BYTES))
+    goto no_format;
+
+  switch (src_format) {
+    case GST_FORMAT_TIME:
+      switch (*dest_format) {
+        case GST_FORMAT_BYTES:
+          scale = sizeof (gint32) * dec->vi.channels;
+        case GST_FORMAT_DEFAULT:
+          *dest_value =
+              scale * gst_util_uint64_scale_int (src_value, dec->vi.rate,
+              GST_SECOND);
+          break;
+        default:
+          res = FALSE;
+      }
+      break;
+    case GST_FORMAT_DEFAULT:
+      switch (*dest_format) {
+        case GST_FORMAT_BYTES:
+          *dest_value = src_value * sizeof (gint32) * dec->vi.channels;
+          break;
+        case GST_FORMAT_TIME:
+          *dest_value =
+              gst_util_uint64_scale_int (src_value, GST_SECOND, dec->vi.rate);
+          break;
+        default:
+          res = FALSE;
+      }
+      break;
+    case GST_FORMAT_BYTES:
+      switch (*dest_format) {
+        case GST_FORMAT_DEFAULT:
+          *dest_value = src_value / (sizeof (gint32) * dec->vi.channels);
+          break;
+        case GST_FORMAT_TIME:
+          *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
+              dec->vi.rate * sizeof (gint32) * dec->vi.channels);
+          break;
+        default:
+          res = FALSE;
+      }
+      break;
+    default:
+      res = FALSE;
+  }
+done:
+  gst_object_unref (dec);
+
+  return res;
+
+  /* ERRORS */
+no_header:
+  {
+    GST_DEBUG_OBJECT (dec, "no header packets received");
+    res = FALSE;
+    goto done;
+  }
+no_format:
+  {
+    GST_DEBUG_OBJECT (dec, "formats unsupported");
+    res = FALSE;
+    goto done;
+  }
+}
+
+static gboolean
+vorbis_dec_src_query (GstPad * pad, GstQuery * query)
+{
+  GstIVorbisDec *dec;
+  gboolean res = FALSE;
+
+  dec = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_POSITION:
+    {
+      gint64 granulepos, value;
+      GstFormat my_format, format;
+      gint64 time;
+
+      /* we start from the last seen granulepos */
+      granulepos = dec->granulepos;
+
+      gst_query_parse_position (query, &format, NULL);
+
+      /* and convert to the final format in two steps with time as the
+       * intermediate step */
+      my_format = GST_FORMAT_TIME;
+      if (!(res =
+              vorbis_dec_convert (pad, GST_FORMAT_DEFAULT, granulepos,
+                  &my_format, &time)))
+        goto error;
+
+      /* correct for the segment values */
+      time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time);
+
+      GST_LOG_OBJECT (dec,
+          "query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));
+
+      /* and convert to the final format */
+      if (!(res = vorbis_dec_convert (pad, my_format, time, &format, &value)))
+        goto error;
+
+      gst_query_set_position (query, format, value);
+
+      GST_LOG_OBJECT (dec,
+          "query %p: we return %lld (format %u)", query, value, format);
+
+      break;
+    }
+    case GST_QUERY_DURATION:
+    {
+      GstPad *peer;
+
+      if (!(peer = gst_pad_get_peer (dec->sinkpad))) {
+        GST_WARNING_OBJECT (dec, "sink pad %" GST_PTR_FORMAT " is not linked",
+            dec->sinkpad);
+        goto error;
+      }
+
+      res = gst_pad_query (peer, query);
+      gst_object_unref (peer);
+      if (!res)
+        goto error;
+
+      break;
+    }
+    case GST_QUERY_CONVERT:
+    {
+      GstFormat src_fmt, dest_fmt;
+      gint64 src_val, dest_val;
+
+      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+      if (!(res =
+              vorbis_dec_convert (pad, src_fmt, src_val, &dest_fmt, &dest_val)))
+        goto error;
+      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+      break;
+    }
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+done:
+  gst_object_unref (dec);
+
+  return res;
+
+  /* ERRORS */
+error:
+  {
+    GST_WARNING_OBJECT (dec, "error handling query");
+    goto done;
+  }
+}
+
+static gboolean
+vorbis_dec_sink_query (GstPad * pad, GstQuery * query)
+{
+  GstIVorbisDec *dec;
+  gboolean res;
+
+  dec = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_CONVERT:
+    {
+      GstFormat src_fmt, dest_fmt;
+      gint64 src_val, dest_val;
+
+      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+      if (!(res =
+              vorbis_dec_convert (pad, src_fmt, src_val, &dest_fmt, &dest_val)))
+        goto error;
+      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+      break;
+    }
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+
+done:
+  gst_object_unref (dec);
+
+  return res;
+
+  /* ERRORS */
+error:
+  {
+    GST_DEBUG_OBJECT (dec, "error converting value");
+    goto done;
+  }
+}
+
+static gboolean
+vorbis_dec_src_event (GstPad * pad, GstEvent * event)
+{
+  gboolean res = TRUE;
+  GstIVorbisDec *dec;
+
+  dec = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_SEEK:
+    {
+      GstFormat format, tformat;
+      gdouble rate;
+      GstEvent *real_seek;
+      GstSeekFlags flags;
+      GstSeekType cur_type, stop_type;
+      gint64 cur, stop;
+      gint64 tcur, tstop;
+
+      gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
+          &stop_type, &stop);
+      gst_event_unref (event);
+
+      /* we have to ask our peer to seek to time here as we know
+       * nothing about how to generate a granulepos from the src
+       * formats or anything.
+       *
+       * First bring the requested format to time
+       */
+      tformat = GST_FORMAT_TIME;
+      if (!(res = vorbis_dec_convert (pad, format, cur, &tformat, &tcur)))
+        goto convert_error;
+      if (!(res = vorbis_dec_convert (pad, format, stop, &tformat, &tstop)))
+        goto convert_error;
+
+      /* then seek with time on the peer */
+      real_seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
+          flags, cur_type, tcur, stop_type, tstop);
+
+      res = gst_pad_push_event (dec->sinkpad, real_seek);
+
+      break;
+    }
+    default:
+      res = gst_pad_push_event (dec->sinkpad, event);
+      break;
+  }
+done:
+  gst_object_unref (dec);
+
+  return res;
+
+  /* ERRORS */
+convert_error:
+  {
+    GST_DEBUG_OBJECT (dec, "cannot convert start/stop for seek");
+    goto done;
+  }
+}
+
+static gboolean
+vorbis_dec_sink_event (GstPad * pad, GstEvent * event)
+{
+  gboolean ret = FALSE;
+  GstIVorbisDec *dec;
+
+  dec = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  GST_LOG_OBJECT (dec, "handling event");
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_EOS:
+      ret = gst_pad_push_event (dec->srcpad, event);
+      break;
+    case GST_EVENT_FLUSH_START:
+      ret = gst_pad_push_event (dec->srcpad, event);
+      break;
+    case GST_EVENT_FLUSH_STOP:
+      /* here we must clean any state in the decoder */
+#ifdef HAVE_VORBIS_SYNTHESIS_RESTART
+      vorbis_synthesis_restart (&dec->vd);
+#endif
+      gst_ivorbis_dec_reset (dec);
+      ret = gst_pad_push_event (dec->srcpad, event);
+      break;
+    case GST_EVENT_NEWSEGMENT:
+    {
+      GstFormat format;
+      gdouble rate, arate;
+      gint64 start, stop, time;
+      gboolean update;
+
+      gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
+          &start, &stop, &time);
+
+      /* we need time and a positive rate for now */
+      if (format != GST_FORMAT_TIME)
+        goto newseg_wrong_format;
+
+      if (rate <= 0.0)
+        goto newseg_wrong_rate;
+
+      GST_DEBUG_OBJECT (dec,
+          "newsegment: update %d, rate %g, arate %g, start %" GST_TIME_FORMAT
+          ", stop %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT,
+          update, rate, arate, GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
+          GST_TIME_ARGS (time));
+
+      /* now configure the values */
+      gst_segment_set_newsegment_full (&dec->segment, update,
+          rate, arate, format, start, stop, time);
+
+      if (dec->initialized)
+        /* and forward */
+        ret = gst_pad_push_event (dec->srcpad, event);
+      else {
+        /* store it to send once we're initialized */
+        dec->pendingevents = g_list_append (dec->pendingevents, event);
+        ret = TRUE;
+      }
+      break;
+    }
+    default:
+      ret = gst_pad_push_event (dec->srcpad, event);
+      break;
+  }
+done:
+  gst_object_unref (dec);
+
+  return ret;
+
+  /* ERRORS */
+newseg_wrong_format:
+  {
+    GST_DEBUG_OBJECT (dec, "received non TIME newsegment");
+    goto done;
+  }
+newseg_wrong_rate:
+  {
+    GST_DEBUG_OBJECT (dec, "negative rates not supported yet");
+    goto done;
+  }
+}
+
+static GstFlowReturn
+vorbis_handle_identification_packet (GstIVorbisDec * vd)
+{
+  GstCaps *caps;
+  const GstAudioChannelPosition *pos = NULL;
+
+  switch (vd->vi.channels) {
+    case 1:
+    case 2:
+      /* nothing */
+      break;
+    case 3:{
+      static const GstAudioChannelPosition pos3[] = {
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT
+      };
+      pos = pos3;
+      break;
+    }
+    case 4:{
+      static const GstAudioChannelPosition pos4[] = {
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
+      };
+      pos = pos4;
+      break;
+    }
+    case 5:{
+      static const GstAudioChannelPosition pos5[] = {
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
+      };
+      pos = pos5;
+      break;
+    }
+    case 6:{
+      static const GstAudioChannelPosition pos6[] = {
+        GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_LFE
+      };
+      pos = pos6;
+      break;
+    }
+    default:
+      goto channel_count_error;
+  }
+
+  caps = gst_caps_new_simple ("audio/x-raw-int",
+      "rate", G_TYPE_INT, vd->vi.rate,
+      "channels", G_TYPE_INT, vd->vi.channels,
+      "endianness", G_TYPE_INT, G_BYTE_ORDER, "width", G_TYPE_INT, 32,
+      "depth", G_TYPE_INT, 16, "signed", G_TYPE_BOOLEAN, TRUE, NULL);
+
+  if (pos) {
+    gst_audio_set_channel_positions (gst_caps_get_structure (caps, 0), pos);
+  }
+  gst_pad_set_caps (vd->srcpad, caps);
+  gst_caps_unref (caps);
+
+  return GST_FLOW_OK;
+
+  /* ERROR */
+channel_count_error:
+  {
+    GST_ELEMENT_ERROR (vd, STREAM, NOT_IMPLEMENTED, (NULL),
+        ("Unsupported channel count %d", vd->vi.channels));
+    return GST_FLOW_ERROR;
+  }
+}
+
+static GstFlowReturn
+vorbis_handle_comment_packet (GstIVorbisDec * vd, ogg_packet * packet)
+{
+#if 0
+  guint bitrate = 0;
+  gchar *encoder = NULL;
+  GstTagList *list;
+  GstBuffer *buf;
+
+  GST_DEBUG_OBJECT (vd, "parsing comment packet");
+
+  buf = gst_buffer_new_and_alloc (packet->bytes);
+  GST_BUFFER_DATA (buf) = packet->packet;
+
+  list =
+      gst_tag_list_from_vorbiscomment_buffer (buf, (guint8 *) "\003vorbis", 7,
+      &encoder);
+
+  vd->taglist = gst_tag_list_merge (vd->taglist, list, GST_TAG_MERGE_REPLACE);
+
+  gst_tag_list_free (list);
+  gst_buffer_unref (buf);
+
+  if (!vd->taglist) {
+    GST_ERROR_OBJECT (vd, "couldn't decode comments");
+    vd->taglist = gst_tag_list_new ();
+  }
+  if (encoder) {
+    gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+        GST_TAG_ENCODER, encoder, NULL);
+    g_free (encoder);
+  }
+  gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+      GST_TAG_ENCODER_VERSION, vd->vi.version,
+      GST_TAG_AUDIO_CODEC, "Vorbis", NULL);
+  if (vd->vi.bitrate_nominal > 0) {
+    gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+        GST_TAG_NOMINAL_BITRATE, (guint) vd->vi.bitrate_nominal, NULL);
+    bitrate = vd->vi.bitrate_nominal;
+  }
+  if (vd->vi.bitrate_upper > 0) {
+    gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+        GST_TAG_MAXIMUM_BITRATE, (guint) vd->vi.bitrate_upper, NULL);
+    if (!bitrate)
+      bitrate = vd->vi.bitrate_upper;
+  }
+  if (vd->vi.bitrate_lower > 0) {
+    gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+        GST_TAG_MINIMUM_BITRATE, (guint) vd->vi.bitrate_lower, NULL);
+    if (!bitrate)
+      bitrate = vd->vi.bitrate_lower;
+  }
+  if (bitrate) {
+    gst_tag_list_add (vd->taglist, GST_TAG_MERGE_REPLACE,
+        GST_TAG_BITRATE, (guint) bitrate, NULL);
+  }
+
+  if (vd->initialized) {
+    gst_element_found_tags_for_pad (GST_ELEMENT_CAST (vd), vd->srcpad,
+        vd->taglist);
+    vd->taglist = NULL;
+  } else {
+    /* Only post them as messages for the time being. *
+     * They will be pushed on the pad once the decoder is initialized */
+    gst_element_post_message (GST_ELEMENT_CAST (vd),
+        gst_message_new_tag (GST_OBJECT (vd), gst_tag_list_copy (vd->taglist)));
+  }
+#endif
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+vorbis_handle_type_packet (GstIVorbisDec * vd)
+{
+  GList *walk;
+
+  g_assert (vd->initialized == FALSE);
+
+  vorbis_synthesis_init (&vd->vd, &vd->vi);
+  vorbis_block_init (&vd->vd, &vd->vb);
+  vd->initialized = TRUE;
+
+  if (vd->pendingevents) {
+    for (walk = vd->pendingevents; walk; walk = g_list_next (walk))
+      gst_pad_push_event (vd->srcpad, GST_EVENT_CAST (walk->data));
+    g_list_free (vd->pendingevents);
+    vd->pendingevents = NULL;
+  }
+
+  if (vd->taglist) {
+    /* The tags have already been sent on the bus as messages. */
+    gst_pad_push_event (vd->srcpad, gst_event_new_tag (vd->taglist));
+    vd->taglist = NULL;
+  }
+
+  return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+vorbis_handle_header_packet (GstIVorbisDec * vd, ogg_packet * packet)
+{
+  GstFlowReturn res;
+
+  GST_DEBUG_OBJECT (vd, "parsing header packet");
+
+  /* Packetno = 0 if the first byte is exactly 0x01 */
+  packet->b_o_s = packet->packet->length ?
+      ((packet->packet->buffer->data[0] == 0x1) ? 1 : 0) : 0;
+
+  if (vorbis_synthesis_headerin (&vd->vi, &vd->vc, packet))
+    goto header_read_error;
+
+  switch (packet->packet->length ? packet->packet->buffer->data[0] : 0x0) {
+    case 0x01:
+      res = vorbis_handle_identification_packet (vd);
+      break;
+    case 0x03:
+      res = vorbis_handle_comment_packet (vd, packet);
+      break;
+    case 0x05:
+      res = vorbis_handle_type_packet (vd);
+      break;
+    default:
+      /* ignore */
+      g_warning ("unknown vorbis header packet found");
+      res = GST_FLOW_OK;
+      break;
+  }
+  return res;
+
+  /* ERRORS */
+header_read_error:
+  {
+    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
+        (NULL), ("couldn't read header packet"));
+    return GST_FLOW_ERROR;
+  }
+}
+
+/* Taken from Tremor, misc.h */
+#ifdef _ARM_ASSEM_
+static inline ogg_int32_t
+CLIP_TO_15 (ogg_int32_t x)
+{
+  int tmp;
+  asm volatile ("subs	%1, %0, #32768\n\t"
+      "movpl	%0, #0x7f00\n\t"
+      "orrpl	%0, %0, #0xff\n"
+      "adds	%1, %0, #32768\n\t"
+      "movmi	%0, #0x8000":"+r" (x), "=r" (tmp)
+      ::"cc");
+
+  return (x);
+}
+#else
+static inline ogg_int32_t
+CLIP_TO_15 (ogg_int32_t x)
+{
+  int ret = x;
+
+  ret -= ((x <= 32767) - 1) & (x - 32767);
+  ret -= ((x >= -32768) - 1) & (x + 32768);
+  return (ret);
+}
+#endif
+
+static void
+copy_samples (gint32 * out, ogg_int32_t ** in, guint samples, gint channels)
+{
+  gint i, j;
+
+  for (j = 0; j < samples; j++) {
+    for (i = 0; i < channels; i++) {
+      *out++ = CLIP_TO_15 (in[i][j] >> 9);
+    }
+  }
+}
+
+/* clip output samples to the segment boundaries
+ */
+static gboolean
+vorbis_do_clip (GstIVorbisDec * dec, GstBuffer * buf)
+{
+  gint64 start, stop, cstart, cstop, diff;
+
+  start = GST_BUFFER_TIMESTAMP (buf);
+  stop = start + GST_BUFFER_DURATION (buf);
+
+  if (!gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
+          start, stop, &cstart, &cstop))
+    goto clipped;
+
+  /* see if some clipping happened */
+  diff = cstart - start;
+  if (diff > 0) {
+    GST_BUFFER_TIMESTAMP (buf) = cstart;
+    GST_BUFFER_DURATION (buf) -= diff;
+
+    /* bring clipped time to samples */
+    diff = gst_util_uint64_scale_int (diff, dec->vi.rate, GST_SECOND);
+    /* samples to bytes */
+    diff *= (sizeof (gint32) * dec->vi.channels);
+    GST_DEBUG_OBJECT (dec, "clipping start to %" GST_TIME_FORMAT " %"
+        G_GUINT64_FORMAT " bytes", GST_TIME_ARGS (cstart), diff);
+    GST_BUFFER_DATA (buf) += diff;
+    GST_BUFFER_SIZE (buf) -= diff;
+  }
+  diff = stop - cstop;
+  if (diff > 0) {
+    GST_BUFFER_DURATION (buf) -= diff;
+
+    /* bring clipped time to samples and then to bytes */
+    diff = gst_util_uint64_scale_int (diff, dec->vi.rate, GST_SECOND);
+    diff *= (sizeof (gint32) * dec->vi.channels);
+    GST_DEBUG_OBJECT (dec, "clipping stop to %" GST_TIME_FORMAT " %"
+        G_GUINT64_FORMAT " bytes", GST_TIME_ARGS (cstop), diff);
+    GST_BUFFER_SIZE (buf) -= diff;
+  }
+
+  return FALSE;
+
+  /* dropped buffer */
+clipped:
+  {
+    GST_DEBUG_OBJECT (dec, "clipped buffer");
+    gst_buffer_unref (buf);
+    return TRUE;
+  }
+}
+
+static GstFlowReturn
+vorbis_dec_push (GstIVorbisDec * dec, GstBuffer * buf)
+{
+  GstFlowReturn result;
+  gint64 outoffset = GST_BUFFER_OFFSET (buf);
+
+  if (outoffset == -1) {
+    dec->queued = g_list_append (dec->queued, buf);
+    GST_DEBUG_OBJECT (dec, "queued buffer");
+    result = GST_FLOW_OK;
+  } else {
+    if (G_UNLIKELY (dec->queued)) {
+      gint64 size;
+      GList *walk;
+
+      GST_DEBUG_OBJECT (dec, "first buffer with offset %lld", outoffset);
+
+      size = g_list_length (dec->queued);
+      for (walk = g_list_last (dec->queued); walk;
+          walk = g_list_previous (walk)) {
+        GstBuffer *buffer = GST_BUFFER (walk->data);
+
+        outoffset -=
+            GST_BUFFER_SIZE (buffer) / (sizeof (gint32) * dec->vi.channels);
+
+        GST_BUFFER_OFFSET (buffer) = outoffset;
+        GST_BUFFER_TIMESTAMP (buffer) =
+            gst_util_uint64_scale_int (outoffset, GST_SECOND, dec->vi.rate);
+        GST_DEBUG_OBJECT (dec, "patch buffer %" G_GUINT64_FORMAT
+            " offset %" G_GUINT64_FORMAT, size, outoffset);
+        size--;
+      }
+      for (walk = dec->queued; walk; walk = g_list_next (walk)) {
+        GstBuffer *buffer = GST_BUFFER (walk->data);
+
+        /* clips or returns FALSE with buffer unreffed when completely
+         * clipped */
+        if (vorbis_do_clip (dec, buffer))
+          continue;
+
+        if (dec->discont) {
+          GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
+          dec->discont = FALSE;
+        }
+        /* ignore the result */
+        gst_pad_push (dec->srcpad, buffer);
+      }
+      g_list_free (dec->queued);
+      dec->queued = NULL;
+    }
+
+    /* clip */
+    if (vorbis_do_clip (dec, buf))
+      return GST_FLOW_OK;
+
+    if (dec->discont) {
+      GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
+      dec->discont = FALSE;
+    }
+    result = gst_pad_push (dec->srcpad, buf);
+  }
+
+  return result;
+}
+
+static GstFlowReturn
+vorbis_handle_data_packet (GstIVorbisDec * vd, ogg_packet * packet)
+{
+  ogg_int32_t **pcm;
+  guint sample_count;
+  GstBuffer *out;
+  GstFlowReturn result;
+  gint size;
+
+  if (!vd->initialized)
+    goto not_initialized;
+
+  /* FIXME, we should queue undecoded packets here until we get
+   * a timestamp, then we reverse timestamp the queued packets and
+   * clip them, then we decode only the ones we want and don't
+   * keep decoded data in memory.
+   * Ideally, of course, the demuxer gives us a valid timestamp on
+   * the first packet.
+   */
+
+  /* normal data packet */
+  /* FIXME, we can skip decoding if the packet is outside of the
+   * segment, this is however not very trivial as we need a previous
+   * packet to decode the current one so we must be carefull not to
+   * throw away too much. For now we decode everything and clip right
+   * before pushing data. */
+  if (G_UNLIKELY (vorbis_synthesis (&vd->vb, packet, 1)))
+    goto could_not_read;
+
+  if (G_UNLIKELY (vorbis_synthesis_blockin (&vd->vd, &vd->vb) < 0))
+    goto not_accepted;
+
+  /* assume all goes well here */
+  result = GST_FLOW_OK;
+
+  /* count samples ready for reading */
+  if ((sample_count = vorbis_synthesis_pcmout (&vd->vd, NULL)) == 0)
+    goto done;
+
+  size = sample_count * vd->vi.channels * sizeof (gint32);
+
+  /* alloc buffer for it */
+  result =
+      gst_pad_alloc_buffer_and_set_caps (vd->srcpad, GST_BUFFER_OFFSET_NONE,
+      size, GST_PAD_CAPS (vd->srcpad), &out);
+  if (G_UNLIKELY (result != GST_FLOW_OK))
+    goto done;
+
+  /* get samples ready for reading now, should be sample_count */
+  if (G_UNLIKELY ((vorbis_synthesis_pcmout (&vd->vd, &pcm)) != sample_count))
+    goto wrong_samples;
+
+  /* copy samples in buffer */
+  copy_samples ((gint32 *) GST_BUFFER_DATA (out), pcm, sample_count,
+      vd->vi.channels);
+
+  GST_BUFFER_SIZE (out) = size;
+  GST_BUFFER_OFFSET (out) = vd->granulepos;
+  if (vd->granulepos != -1) {
+    GST_BUFFER_OFFSET_END (out) = vd->granulepos + sample_count;
+    GST_BUFFER_TIMESTAMP (out) =
+        gst_util_uint64_scale_int (vd->granulepos, GST_SECOND, vd->vi.rate);
+  } else {
+    GST_BUFFER_TIMESTAMP (out) = -1;
+  }
+  /* this should not overflow */
+  GST_BUFFER_DURATION (out) = sample_count * GST_SECOND / vd->vi.rate;
+
+  if (vd->cur_timestamp != GST_CLOCK_TIME_NONE) {
+    GST_BUFFER_TIMESTAMP (out) = vd->cur_timestamp;
+    GST_DEBUG_OBJECT (vd,
+        "cur_timestamp: %" GST_TIME_FORMAT " + %" GST_TIME_FORMAT " = % "
+        GST_TIME_FORMAT, GST_TIME_ARGS (vd->cur_timestamp),
+        GST_TIME_ARGS (GST_BUFFER_DURATION (out)),
+        GST_TIME_ARGS (vd->cur_timestamp + GST_BUFFER_DURATION (out)));
+    vd->cur_timestamp += GST_BUFFER_DURATION (out);
+    GST_BUFFER_OFFSET (out) = GST_CLOCK_TIME_TO_FRAMES (vd->cur_timestamp,
+        vd->vi.rate);
+    GST_BUFFER_OFFSET_END (out) = GST_BUFFER_OFFSET (out) + sample_count;
+  }
+
+  if (vd->granulepos != -1)
+    vd->granulepos += sample_count;
+
+  result = vorbis_dec_push (vd, out);
+
+done:
+  vorbis_synthesis_read (&vd->vd, sample_count);
+
+  /* granulepos is the last sample in the packet */
+  if (packet->granulepos != -1)
+    vd->granulepos = packet->granulepos;
+
+  return result;
+
+  /* ERRORS */
+not_initialized:
+  {
+    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
+        (NULL), ("no header sent yet"));
+    return GST_FLOW_ERROR;
+  }
+could_not_read:
+  {
+    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
+        (NULL), ("couldn't read data packet"));
+    return GST_FLOW_ERROR;
+  }
+not_accepted:
+  {
+    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
+        (NULL), ("vorbis decoder did not accept data packet"));
+    return GST_FLOW_ERROR;
+  }
+wrong_samples:
+  {
+    gst_buffer_unref (out);
+    GST_ELEMENT_ERROR (GST_ELEMENT (vd), STREAM, DECODE,
+        (NULL), ("vorbis decoder reported wrong number of samples"));
+    return GST_FLOW_ERROR;
+  }
+}
+
+static GstFlowReturn
+vorbis_dec_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstIVorbisDec *vd;
+  ogg_packet packet;
+  ogg_reference ref;
+  ogg_buffer buf;
+  GstFlowReturn result = GST_FLOW_OK;
+  GstClockTime timestamp;
+  guint64 offset_end;
+
+  vd = GST_IVORBIS_DEC (gst_pad_get_parent (pad));
+
+  /* resync on DISCONT */
+  if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
+    GST_DEBUG_OBJECT (vd, "received DISCONT buffer");
+    vd->granulepos = -1;
+    vd->cur_timestamp = GST_CLOCK_TIME_NONE;
+    vd->prev_timestamp = GST_CLOCK_TIME_NONE;
+#ifdef HAVE_VORBIS_SYNTHESIS_RESTART
+    vorbis_synthesis_restart (&vd->vd);
+#endif
+    vd->discont = TRUE;
+  }
+
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+  offset_end = GST_BUFFER_OFFSET_END (buffer);
+
+  /* only ogg has granulepos, demuxers of other container formats 
+   * might provide us with timestamps instead (e.g. matroskademux) */
+  if (offset_end == GST_BUFFER_OFFSET_NONE && timestamp != GST_CLOCK_TIME_NONE) {
+    /* we might get multiple consecutive buffers with the same timestamp */
+    if (timestamp != vd->prev_timestamp) {
+      vd->cur_timestamp = timestamp;
+      vd->prev_timestamp = timestamp;
+    }
+  } else {
+    vd->cur_timestamp = GST_CLOCK_TIME_NONE;
+    vd->prev_timestamp = GST_CLOCK_TIME_NONE;
+  }
+
+  /* make ogg_packet out of the buffer */
+  buf.data = GST_BUFFER_DATA (buffer);
+  buf.size = GST_BUFFER_SIZE (buffer);
+  buf.refcount = 1;
+  buf.ptr.owner = NULL;
+  buf.ptr.next = NULL;
+
+  ref.buffer = &buf;
+  ref.begin = 0;
+  ref.length = buf.size;
+  ref.next = NULL;
+
+  packet.packet = &ref;
+  packet.bytes = ref.length;
+  packet.granulepos = offset_end;
+  packet.packetno = 0;          /* we don't care */
+  /*
+   * FIXME. Is there anyway to know that this is the last packet and
+   * set e_o_s??
+   * Yes there is, keep one packet at all times and only push out when
+   * you receive a new one.  Implement this.
+   */
+  packet.e_o_s = 0;
+
+  if (G_UNLIKELY (packet.bytes < 1))
+    goto wrong_size;
+
+  GST_DEBUG_OBJECT (vd, "vorbis granule: %" G_GINT64_FORMAT,
+      (gint64) packet.granulepos);
+
+  /* switch depending on packet type */
+  if (buf.data[0] & 1) {
+    if (vd->initialized) {
+      GST_WARNING_OBJECT (vd, "Already initialized, so ignoring header packet");
+      goto done;
+    }
+    result = vorbis_handle_header_packet (vd, &packet);
+  } else {
+    result = vorbis_handle_data_packet (vd, &packet);
+  }
+
+  GST_DEBUG_OBJECT (vd, "offset end: %" G_GUINT64_FORMAT, offset_end);
+
+done:
+  gst_buffer_unref (buffer);
+  gst_object_unref (vd);
+
+  return result;
+
+  /* ERRORS */
+wrong_size:
+  {
+    GST_ELEMENT_ERROR (vd, STREAM, DECODE, (NULL), ("empty buffer received"));
+    result = GST_FLOW_ERROR;
+    vd->discont = TRUE;
+    goto done;
+  }
+}
+
+static GstStateChangeReturn
+vorbis_dec_change_state (GstElement * element, GstStateChange transition)
+{
+  GstIVorbisDec *vd = GST_IVORBIS_DEC (element);
+  GstStateChangeReturn res;
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      vorbis_info_init (&vd->vi);
+      vorbis_comment_init (&vd->vc);
+      vd->initialized = FALSE;
+      gst_ivorbis_dec_reset (vd);
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+      break;
+    default:
+      break;
+  }
+
+  res = parent_class->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      GST_DEBUG_OBJECT (vd, "PAUSED -> READY, clearing vorbis structures");
+      vorbis_block_clear (&vd->vb);
+      vorbis_dsp_clear (&vd->vd);
+      vorbis_comment_clear (&vd->vc);
+      vorbis_info_clear (&vd->vi);
+      gst_ivorbis_dec_reset (vd);
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+
+  return res;
+}
diff --git a/ext/ivorbis/vorbisdec.h b/ext/ivorbis/vorbisdec.h
new file mode 100644
index 00000000..3bc29f22
--- /dev/null
+++ b/ext/ivorbis/vorbisdec.h
@@ -0,0 +1,87 @@
+/* -*- c-basic-offset: 2 -*-
+ * GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * Tremor modifications <2006>:
+ *   Chris Lord, OpenedHand Ltd. <chris@openedhand.com>, http://www.o-hand.com/
+ *
+ * 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_IVORBIS_DEC_H__
+#define __GST_IVORBIS_DEC_H__
+
+
+#include <gst/gst.h>
+#include <tremor/ivorbiscodec.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_IVORBIS_DEC \
+  (gst_ivorbis_dec_get_type())
+#define GST_IVORBIS_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IVORBIS_DEC,GstIVorbisDec))
+#define GST_IVORBIS_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IVORBIS_DEC,GstIVorbisDecClass))
+#define GST_IS_IVORBIS_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IVORBIS_DEC))
+#define GST_IS_IVORBIS_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IVORBIS_DEC))
+
+typedef struct _GstIVorbisDec GstIVorbisDec;
+typedef struct _GstIVorbisDecClass GstIVorbisDecClass;
+
+/**
+ * GstIVorbisDec:
+ *
+ * Opaque data structure.
+ */
+struct _GstIVorbisDec {
+  GstElement            element;
+
+  GstPad *              sinkpad;
+  GstPad *              srcpad;
+
+  vorbis_dsp_state      vd;
+  vorbis_info           vi;
+  vorbis_comment        vc;
+  vorbis_block          vb;
+  guint64               granulepos;
+
+  gboolean              initialized;
+
+  GList                 *queued;
+
+  GstSegment		segment;
+  gboolean		discont;
+
+  GstClockTime          cur_timestamp; /* only used with non-ogg container formats */
+  GstClockTime          prev_timestamp; /* only used with non-ogg container formats */
+
+  GList			*pendingevents;
+  GstTagList		*taglist;
+};
+
+struct _GstIVorbisDecClass {
+  GstElementClass parent_class;
+};
+
+GType gst_ivorbis_dec_get_type(void);
+
+G_END_DECLS
+
+#endif /* __GST_IVORBIS_DEC_H__ */