Added new plugin amrwb parse.

Original commit message from CVS:
Patch by: Renato Araujo Oliveira Filho <renatox at gmail dot com>
* configure.ac:
* ext/Makefile.am:
* ext/amrwb/Makefile.am:
* ext/amrwb/README:
* ext/amrwb/amrwb-code/Makefile.am:
* ext/amrwb/amrwb-code/run.sh:
* ext/amrwb/gstamrwb.c: (plugin_init):
* ext/amrwb/gstamrwbdec.c: (gst_amrwbdec_base_init),
(gst_amrwbdec_class_init), (gst_amrwbdec_init),
(gst_amrwbdec_setcaps), (gst_amrwbdec_event), (gst_amrwbdec_chain),
(gst_amrwbdec_state_change):
* ext/amrwb/gstamrwbdec.h:
* ext/amrwb/gstamrwbenc.c: (gst_amrwbenc_base_init),
(gst_amrwbenc_class_init), (gst_amrwbenc_init),
(gst_amrwbenc_finalize), (gst_amrwbenc_setcaps),
(gst_amrwbenc_chain), (gst_amrwbenc_state_change):
* ext/amrwb/gstamrwbenc.h:
* ext/amrwb/gstamrwbparse.c: (gst_amrwbparse_base_init),
(gst_amrwbparse_class_init), (gst_amrwbparse_init),
(gst_amrwbparse_querytypes), (gst_amrwbparse_query),
(gst_amrwbparse_chain), (gst_amrwbparse_read_header),
(gst_amrwbparse_loop), (gst_amrwbparse_sink_activate),
(gst_amrwbparse_sink_activate_pull), (gst_amrwbparse_state_change):
* ext/amrwb/gstamrwbparse.h:
Added new plugin amrwb parse.
Renamed audio/AMR to audio/AMR-WB as per spec.
Fixes #333307

12 files changed, 1357 insertions, 0 deletions

diff --git a/ext/Makefile.am b/ext/Makefile.am
index 3182000a..2ee8bf8d 100644
--- a/ext/Makefile.am
+++ b/ext/Makefile.am
@@ -1,3 +1,10 @@
+
+if USE_AMRWB
+ AMRWB_DIR = amrwb
+else
+ AMRWB_DIR =
+endif
+
 # if USE_ARTS
 # ARTS_DIR=arts
 # else
@@ -221,6 +228,7 @@ XVID_DIR=
 endif
 
 SUBDIRS=\
+	$(AMRWB_DIR) \
 	$(ARTS_DIR) \
 	$(ARTSC_DIR) \
 	$(AUDIOFILE_DIR) \
@@ -260,6 +268,7 @@ SUBDIRS=\
 	$(XVID_DIR)
 
 DIST_SUBDIRS= \
+	amrwb \
 	bz2 \
 	directfb \
 	faac \
diff --git a/ext/amrwb/Makefile.am b/ext/amrwb/Makefile.am
new file mode 100644
index 00000000..3efa09d8
--- /dev/null
+++ b/ext/amrwb/Makefile.am
@@ -0,0 +1,18 @@
+SUBDIRS = amrwb-code 
+plugin_LTLIBRARIES = libgstamrwb.la
+
+libgstamrwb_la_SOURCES = 	\
+	gstamrwb.c		\
+	gstamrwbdec.c		\
+	gstamrwbenc.c		\
+	gstamrwbparse.c
+
+libgstamrwb_la_CFLAGS = $(GST_CFLAGS) $(AMRWB_CFLAGS) -Iamrwb-code/
+libgstamrwb_la_LIBADD = $(GST_BASE_LIBS) $(AMRWB_LIBS) amrwb-code/libamrwb.la
+libgstamrwb_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS =	\
+	gstamrwbdec.h	\
+	gstamrwbenc.h	\
+	gstamrwbparse.h
+
diff --git a/ext/amrwb/README b/ext/amrwb/README
new file mode 100644
index 00000000..82d33715
--- /dev/null
+++ b/ext/amrwb/README
@@ -0,0 +1,12 @@
+Compiling AMRWB codec:
+======================
+
+To compile the amrwb codec, you need to download the source code from 
+"http://www.3gpp.org/ftp/Specs/html-info/26204.htm" and uncompress the 
+files inside an amrwb-code directory;
+
+or execute this commands:
+$cd amrwb-code
+$sh ./run.sh
+
+and run the "autogen" script again.
diff --git a/ext/amrwb/amrwb-code/Makefile.am b/ext/amrwb/amrwb-code/Makefile.am
new file mode 100644
index 00000000..a11be20c
--- /dev/null
+++ b/ext/amrwb/amrwb-code/Makefile.am
@@ -0,0 +1,44 @@
+noinst_LTLIBRARIES = libamrwb.la 
+
+libamrwb_la_SOURCES = 	\
+	enc_acelp.c \
+	enc_dtx.c \
+	enc_gain.c \
+	enc_if.c \
+	enc_lpc.c \
+	enc_main.c \
+	enc_rom.c \
+	enc_util.c \
+	if_rom.c \
+	dec_acelp.c \
+	dec_dtx.c \
+	dec_gain.c \
+	dec_if.c \
+	dec_lpc.c \
+	dec_main.c \
+	dec_rom.c \
+	dec_util.c 
+
+libamrwb_la_CFLAGS = -I./amrwb-code/c-code
+libamrwb_la_LIBADD = $(GST_BASE_LIBS) $(AMRWB_LIBS) 
+libamrwb_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS =	\
+	dec_acelp.h \
+	dec_dtx.h \
+	dec_gain.h \
+	dec.h \
+	dec_if.h \
+	dec_lpc.h \
+	dec_main.h \
+	dec_util.h \
+	enc_acelp.h \
+	enc_dtx.h \
+	enc_gain.h \
+	enc.h \
+	enc_if.h \
+	enc_lpc.h \
+	enc_main.h \
+	enc_util.h \
+	if_rom.h \
+	typedef.h
diff --git a/ext/amrwb/amrwb-code/run.sh b/ext/amrwb/amrwb-code/run.sh
new file mode 100644
index 00000000..323f451a
--- /dev/null
+++ b/ext/amrwb/amrwb-code/run.sh
@@ -0,0 +1,6 @@
+wget http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-600.zip
+unzip 26204-600.zip
+unzip 26204-600_ANSI-C_source_code.zip
+mv c-code/* .
+rm -rf c-code/ 26204-600.zip 26204-600_ANSI-C_source_code.zip
+echo "" >> typedef.h # to remove compilation warning (no newline at end of file)
diff --git a/ext/amrwb/gstamrwb.c b/ext/amrwb/gstamrwb.c
new file mode 100644
index 00000000..6974dc25
--- /dev/null
+++ b/ext/amrwb/gstamrwb.c
@@ -0,0 +1,44 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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 "gstamrwbdec.h"
+#include "gstamrwbenc.h"
+#include "gstamrwbparse.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "amrwbdec",
+      GST_RANK_PRIMARY, GST_TYPE_AMRWBDEC) &&
+      gst_element_register (plugin, "amrwbparse",
+      GST_RANK_PRIMARY, GST_TYPE_AMRWBPARSE) &&
+      gst_element_register (plugin, "amrwbenc",
+      GST_RANK_NONE, GST_TYPE_AMRWBENC);
+}
+
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "amrwb",
+    "Adaptive Multi-Rate Wide-Band",
+    plugin_init, VERSION, GST_LICENSE_UNKNOWN, GST_PACKAGE, GST_ORIGIN);
diff --git a/ext/amrwb/gstamrwbdec.c b/ext/amrwb/gstamrwbdec.c
new file mode 100644
index 00000000..0feed2bd
--- /dev/null
+++ b/ext/amrwb/gstamrwbdec.c
@@ -0,0 +1,297 @@
+/* GStreamer Adaptive Multi-Rate Narrow-Band (AMR-NB) plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 "gstamrwbdec.h"
+
+static GstElementDetails gst_amrwbdec_details = {
+  "AMR-WB decoder",
+  "Codec/Decoder/Audio",
+  "Adaptive Multi-Rate Wideband audio decoder",
+  "Renato Araujo <renato.filho@indt.org.br>"
+};
+
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/AMR-WB, "
+        "rate = (int) 16000, " "channels = (int) 1")
+    );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "width = (int) 16, "
+        "depth = (int) 16, "
+        "signed = (boolean) TRUE, "
+        "endianness = (int) BYTE_ORDER, "
+        "rate = (int) 16000, " "channels = (int) 1")
+    );
+
+extern const UWord8 block_size[];
+
+static void gst_amrwbdec_base_init (gpointer klass);
+static void gst_amrwbdec_class_init (GstAmrwbDecClass * klass);
+static void gst_amrwbdec_init (GstAmrwbDec * amrwbdec,
+    GstAmrwbDecClass * klass);
+
+static gboolean gst_amrwbdec_event (GstPad * pad, GstEvent * event);
+static GstFlowReturn gst_amrwbdec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_amrwbdec_setcaps (GstPad * pad, GstCaps * caps);
+static GstStateChangeReturn gst_amrwbdec_state_change (GstElement * element,
+    GstStateChange transition);
+
+GST_BOILERPLATE (GstAmrwbDec, gst_amrwbdec, GstElement, GST_TYPE_ELEMENT)
+
+     static void gst_amrwbdec_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+
+  gst_element_class_set_details (element_class, &gst_amrwbdec_details);
+}
+
+static void
+gst_amrwbdec_class_init (GstAmrwbDecClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  element_class->change_state = gst_amrwbdec_state_change;
+}
+
+static void
+gst_amrwbdec_init (GstAmrwbDec * amrwbdec, GstAmrwbDecClass * klass)
+{
+  /* create the sink pad */
+  amrwbdec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_pad_set_setcaps_function (amrwbdec->sinkpad, gst_amrwbdec_setcaps);
+  gst_pad_set_event_function (amrwbdec->sinkpad, gst_amrwbdec_event);
+  gst_pad_set_chain_function (amrwbdec->sinkpad, gst_amrwbdec_chain);
+  gst_element_add_pad (GST_ELEMENT (amrwbdec), amrwbdec->sinkpad);
+
+  /* create the src pad */
+  amrwbdec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_pad_use_fixed_caps (amrwbdec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (amrwbdec), amrwbdec->srcpad);
+
+  amrwbdec->adapter = gst_adapter_new ();
+
+  /* init rest */
+  amrwbdec->handle = NULL;
+  amrwbdec->channels = 0;
+  amrwbdec->rate = 0;
+  amrwbdec->duration = 0;
+  amrwbdec->ts = -1;
+}
+
+static gboolean
+gst_amrwbdec_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstStructure *structure;
+  GstAmrwbDec *amrwbdec;
+  GstCaps *copy;
+
+  amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad));
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  /* get channel count */
+  gst_structure_get_int (structure, "channels", &amrwbdec->channels);
+  gst_structure_get_int (structure, "rate", &amrwbdec->rate);
+
+  /* create reverse caps */
+  copy = gst_caps_new_simple ("audio/x-raw-int",
+      "channels", G_TYPE_INT, amrwbdec->channels,
+      "width", G_TYPE_INT, 16,
+      "depth", G_TYPE_INT, 16,
+      "endianness", G_TYPE_INT, G_BYTE_ORDER,
+      "rate", G_TYPE_INT, amrwbdec->rate, "signed", G_TYPE_BOOLEAN, TRUE, NULL);
+
+  amrwbdec->duration = gst_util_uint64_scale_int (GST_SECOND, L_FRAME16k,
+      amrwbdec->rate * amrwbdec->channels);
+
+  gst_pad_set_caps (amrwbdec->srcpad, copy);
+  gst_caps_unref (copy);
+
+  gst_object_unref (amrwbdec);
+
+  return TRUE;
+}
+
+static gboolean
+gst_amrwbdec_event (GstPad * pad, GstEvent * event)
+{
+  GstAmrwbDec *amrwbdec;
+  gboolean ret = TRUE;
+
+  amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad));
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_FLUSH_START:
+      ret = gst_pad_push_event (amrwbdec->srcpad, event);
+      break;
+    case GST_EVENT_FLUSH_STOP:
+      ret = gst_pad_push_event (amrwbdec->srcpad, event);
+      gst_adapter_clear (amrwbdec->adapter);
+      amrwbdec->ts = -1;
+      break;
+    case GST_EVENT_EOS:
+      gst_adapter_clear (amrwbdec->adapter);
+      ret = gst_pad_push_event (amrwbdec->srcpad, event);
+      break;
+    default:
+      ret = gst_pad_push_event (amrwbdec->srcpad, event);
+      break;
+  }
+  gst_object_unref (amrwbdec);
+
+  return ret;
+}
+
+static GstFlowReturn
+gst_amrwbdec_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstAmrwbDec *amrwbdec;
+  GstFlowReturn ret = GST_FLOW_OK;
+
+  amrwbdec = GST_AMRWBDEC (gst_pad_get_parent (pad));
+
+  if (amrwbdec->rate == 0 || amrwbdec->channels == 0) {
+    GST_ELEMENT_ERROR (amrwbdec, STREAM, TYPE_NOT_FOUND, (NULL),
+        ("Decoder is not initialized"));
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
+
+
+  if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
+    amrwbdec->ts = GST_BUFFER_TIMESTAMP (buffer);
+
+  gst_adapter_push (amrwbdec->adapter, buffer);
+
+  while (TRUE) {
+    GstBuffer *out;
+    UWord8 *data;
+    Word16 block, mode;
+
+
+    if (gst_adapter_available (amrwbdec->adapter) < 1)
+      break;
+
+    data = (UWord8 *) gst_adapter_peek (amrwbdec->adapter, 1);
+
+    /* get size */
+    mode = (Word16) (data[0] >> 3) & 0x0F;
+    block = block_size[mode];
+
+    if (gst_adapter_available (amrwbdec->adapter) < block) {
+      break;
+    }
+
+    /* the library seems to write into the source data, hence
+     * the copy. */
+    data = (UWord8 *) gst_adapter_take (amrwbdec->adapter, block);
+
+    /* get output */
+    out = gst_buffer_new_and_alloc (sizeof (Word16) * L_FRAME16k);
+
+    GST_BUFFER_DURATION (out) = amrwbdec->duration;
+    GST_BUFFER_TIMESTAMP (out) = amrwbdec->ts;
+
+    if (amrwbdec->ts != -1)
+      amrwbdec->ts += GST_BUFFER_DURATION (out);
+
+    gst_buffer_set_caps (out, GST_PAD_CAPS (amrwbdec->srcpad));
+
+    /* decode */
+    D_IF_decode (amrwbdec->handle, data,
+        (Word16 *) GST_BUFFER_DATA (out), _good_frame);
+
+    g_free (data);
+
+    /* play */
+    ret = gst_pad_push (amrwbdec->srcpad, out);
+  }
+
+done:
+
+  gst_object_unref (amrwbdec);
+  return ret;
+
+}
+
+static GstStateChangeReturn
+gst_amrwbdec_state_change (GstElement * element, GstStateChange transition)
+{
+  GstAmrwbDec *amrwbdec;
+  GstStateChangeReturn ret;
+
+  amrwbdec = GST_AMRWBDEC (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      if (!(amrwbdec->handle = D_IF_init ()))
+        goto init_failed;
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      gst_adapter_clear (amrwbdec->adapter);
+      amrwbdec->rate = 0;
+      amrwbdec->channels = 0;
+      amrwbdec->ts = -1;
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      D_IF_exit (amrwbdec->handle);
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+
+  /* ERRORS */
+init_failed:
+  {
+    GST_ELEMENT_ERROR (amrwbdec, LIBRARY, INIT, (NULL),
+        ("Failed to open AMR Decoder"));
+    return GST_STATE_CHANGE_FAILURE;
+  }
+}
diff --git a/ext/amrwb/gstamrwbdec.h b/ext/amrwb/gstamrwbdec.h
new file mode 100644
index 00000000..854c741f
--- /dev/null
+++ b/ext/amrwb/gstamrwbdec.h
@@ -0,0 +1,69 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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_AMRWBDEC_H__
+#define __GST_AMRWBDEC_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+#include "typedef.h"
+#include "dec_if.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_AMRWBDEC			\
+  (gst_amrwbdec_get_type())
+#define GST_AMRWBDEC(obj)						\
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_AMRWBDEC, GstAmrwbDec))
+#define GST_AMRWBDEC_CLASS(klass)					\
+  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_AMRWBDEC, GstAmrwbDec))
+#define GST_IS_AMRWBDEC(obj)					\
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_AMRWBDEC))
+#define GST_IS_AMRWBDEC_CLASS(obj)			\
+  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_AMRWBDEC))
+
+typedef struct _GstAmrwbDec GstAmrwbDec;
+typedef struct _GstAmrwbDecClass GstAmrwbDecClass;
+
+struct _GstAmrwbDec {
+  GstElement element;
+
+  /* pads */
+  GstPad *sinkpad, *srcpad;
+  guint64 ts;
+
+  GstAdapter *adapter;
+
+  /* library handle */
+  void *handle;
+
+  /* output settings */
+  gint channels, rate;
+  gint duration;
+};
+
+struct _GstAmrwbDecClass {
+  GstElementClass parent_class;
+};
+
+GType gst_amrwbdec_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_AMRWBDEC_H__ */
diff --git a/ext/amrwb/gstamrwbenc.c b/ext/amrwb/gstamrwbenc.c
new file mode 100644
index 00000000..ad2ccecc
--- /dev/null
+++ b/ext/amrwb/gstamrwbenc.c
@@ -0,0 +1,251 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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 "gstamrwbenc.h"
+
+static GstElementDetails gst_amrwbenc_details = {
+  "AMR-WB encoder",
+  "Codec/Encoder/Audio",
+  "Adaptive Multi-Rate Wideband audio encoder",
+  "Renato Araujo <renato.filho@indt.org.br>"
+};
+
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "width = (int) 16, "
+        "depth = (int) 16, "
+        "signed = (boolean) TRUE, "
+        "endianness = (int) BYTE_ORDER, "
+        "rate = (int) 16000, " "channels = (int) 1")
+    );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/AMR-WB, "
+        "rate = (int) 16000, " "channels = (int) 1")
+    );
+
+static void gst_amrwbenc_base_init (gpointer klass);
+static void gst_amrwbenc_class_init (GstAmrwbEncClass * klass);
+static void gst_amrwbenc_init (GstAmrwbEnc * amrwbenc,
+    GstAmrwbEncClass * klass);
+static void gst_amrwbenc_finalize (GObject * object);
+
+static GstFlowReturn gst_amrwbenc_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_amrwbenc_setcaps (GstPad * pad, GstCaps * caps);
+static GstStateChangeReturn gst_amrwbenc_state_change (GstElement * element,
+    GstStateChange transition);
+
+
+GST_BOILERPLATE (GstAmrwbEnc, gst_amrwbenc, GstElement, GST_TYPE_ELEMENT)
+
+     static void gst_amrwbenc_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+
+  gst_element_class_set_details (element_class, &gst_amrwbenc_details);
+}
+
+static void
+gst_amrwbenc_class_init (GstAmrwbEncClass * klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  object_class->finalize = gst_amrwbenc_finalize;
+
+  element_class->change_state = gst_amrwbenc_state_change;
+}
+
+static void
+gst_amrwbenc_init (GstAmrwbEnc * amrwbenc, GstAmrwbEncClass * klass)
+{
+  /* create the sink pad */
+  amrwbenc->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_pad_set_setcaps_function (amrwbenc->sinkpad, gst_amrwbenc_setcaps);
+  gst_pad_set_chain_function (amrwbenc->sinkpad, gst_amrwbenc_chain);
+  gst_element_add_pad (GST_ELEMENT (amrwbenc), amrwbenc->sinkpad);
+
+  /* create the src pad */
+  amrwbenc->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_pad_use_fixed_caps (amrwbenc->srcpad);
+  gst_element_add_pad (GST_ELEMENT (amrwbenc), amrwbenc->srcpad);
+
+  amrwbenc->adapter = gst_adapter_new ();
+
+  /* init rest */
+  amrwbenc->handle = NULL;
+  amrwbenc->channels = 0;
+  amrwbenc->rate = 0;
+  amrwbenc->ts = 0;
+}
+
+static void
+gst_amrwbenc_finalize (GObject * object)
+{
+  GstAmrwbEnc *amrwbenc;
+
+  amrwbenc = GST_AMRWBENC (object);
+
+  g_object_unref (G_OBJECT (amrwbenc->adapter));
+  amrwbenc->adapter = NULL;
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_amrwbenc_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstStructure *structure;
+  GstAmrwbEnc *amrwbenc;
+  GstCaps *copy;
+
+  amrwbenc = GST_AMRWBENC (GST_PAD_PARENT (pad));
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  /* get channel count */
+  gst_structure_get_int (structure, "channels", &amrwbenc->channels);
+  gst_structure_get_int (structure, "rate", &amrwbenc->rate);
+
+  /* this is not wrong but will sound bad */
+  if (amrwbenc->channels != 1) {
+    GST_WARNING ("amrwbdec is only optimized for mono channels");
+  }
+  if (amrwbenc->rate != 16000) {
+    GST_WARNING ("amrwbdec is only optimized for 16000 Hz samplerate");
+  }
+
+  /* create reverse caps */
+  copy = gst_caps_new_simple ("audio/AMR-WB",
+      "channels", G_TYPE_INT, amrwbenc->channels,
+      "rate", G_TYPE_INT, amrwbenc->rate, NULL);
+
+  gst_pad_set_caps (amrwbenc->srcpad, copy);
+  gst_caps_unref (copy);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_amrwbenc_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstAmrwbEnc *amrwbenc;
+  GstFlowReturn ret = GST_FLOW_OK;
+  const int buffer_size = sizeof (Word16) * L_FRAME16k;
+
+  amrwbenc = GST_AMRWBENC (gst_pad_get_parent (pad));
+
+  g_return_val_if_fail (amrwbenc->handle, GST_FLOW_WRONG_STATE);
+
+  if (amrwbenc->rate == 0 || amrwbenc->channels == 0) {
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
+
+  if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
+    amrwbenc->ts = GST_BUFFER_TIMESTAMP (buffer);
+
+  ret = GST_FLOW_OK;
+  gst_adapter_push (amrwbenc->adapter, buffer);
+
+  /* Collect samples until we have enough for an output frame */
+  while (gst_adapter_available (amrwbenc->adapter) >= buffer_size) {
+    GstBuffer *out;
+    guint8 *data;
+    gint outsize;
+
+    out = gst_buffer_new_and_alloc (buffer_size);
+    GST_BUFFER_DURATION (out) = GST_SECOND * L_FRAME16k /
+        (amrwbenc->rate * amrwbenc->channels);
+    GST_BUFFER_TIMESTAMP (out) = amrwbenc->ts;
+    amrwbenc->ts += GST_BUFFER_DURATION (out);
+    gst_buffer_set_caps (out, gst_pad_get_caps (amrwbenc->srcpad));
+
+    data = (guint8 *) gst_adapter_peek (amrwbenc->adapter, buffer_size);
+
+    /* encode */
+    outsize = E_IF_encode (amrwbenc->handle, 0, (Word16 *) data,
+        (UWord8 *) GST_BUFFER_DATA (out), 0);
+
+    gst_adapter_flush (amrwbenc->adapter, buffer_size);
+    GST_BUFFER_SIZE (out) = outsize;
+
+    ret = gst_pad_push (amrwbenc->srcpad, out);
+  }
+
+done:
+
+  gst_object_unref (amrwbenc);
+  return ret;
+
+}
+
+static GstStateChangeReturn
+gst_amrwbenc_state_change (GstElement * element, GstStateChange transition)
+{
+  GstAmrwbEnc *amrwbenc;
+  GstStateChangeReturn ret;
+
+  amrwbenc = GST_AMRWBENC (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      if (!(amrwbenc->handle = E_IF_init ()))
+        return GST_STATE_CHANGE_FAILURE;
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      amrwbenc->ts = 0;
+      gst_adapter_clear (amrwbenc->adapter);
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      E_IF_exit (amrwbenc->handle);
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+}
diff --git a/ext/amrwb/gstamrwbenc.h b/ext/amrwb/gstamrwbenc.h
new file mode 100644
index 00000000..e1788102
--- /dev/null
+++ b/ext/amrwb/gstamrwbenc.h
@@ -0,0 +1,69 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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_AMRWBENC_H__
+#define __GST_AMRWBENC_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+#include "enc_if.h"
+#include "typedef.h"
+
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_AMRWBENC			\
+  (gst_amrwbenc_get_type())
+#define GST_AMRWBENC(obj)						\
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_AMRWBENC, GstAmrwbEnc))
+#define GST_AMRWBENC_CLASS(klass)					\
+  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_AMRWBENC, GstAmrwbEnc))
+#define GST_IS_AMRWBENC(obj)					\
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_AMRWBENC))
+#define GST_IS_AMRWBENC_CLASS(obj)			\
+  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_AMRWBENC))
+
+typedef struct _GstAmrwbEnc GstAmrwbEnc;
+typedef struct _GstAmrwbEncClass GstAmrwbEncClass;
+
+struct _GstAmrwbEnc {
+  GstElement element;
+
+  /* pads */
+  GstPad *sinkpad, *srcpad;
+  guint64 ts;
+
+  GstAdapter *adapter;
+
+  /* library handle */
+  void *handle;
+
+  /* input settings */
+  gint channels, rate;
+};
+
+struct _GstAmrwbEncClass {
+  GstElementClass parent_class;
+};
+
+GType gst_amrwbenc_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_AMRWBENC_H__ */
diff --git a/ext/amrwb/gstamrwbparse.c b/ext/amrwb/gstamrwbparse.c
new file mode 100644
index 00000000..9cd03371
--- /dev/null
+++ b/ext/amrwb/gstamrwbparse.c
@@ -0,0 +1,473 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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 <string.h>
+
+#include "typedef.h"
+#include "gstamrwbparse.h"
+#include "dec_if.h"
+
+
+GST_DEBUG_CATEGORY_STATIC (amrwbparse_debug);
+#define GST_CAT_DEFAULT amrwbparse_debug
+
+static GstElementDetails gst_amrwbparse_details = {
+  "AMR-WB parser",
+  "Codec/Parser/Audio",
+  "Adaptive Multi-Rate WideBand audio parser",
+  "Renato Filho <renato.filho@indt.org.br>"
+};
+
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/AMR-WB, "
+        "rate = (int) 16000, " "channels = (int) 1")
+    );
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-amr-wb-sh")
+    );
+
+extern const UWord8 block_size[];
+
+static void gst_amrwbparse_base_init (gpointer klass);
+static void gst_amrwbparse_class_init (GstAmrwbParseClass * klass);
+static void gst_amrwbparse_init (GstAmrwbParse * amrwbparse,
+    GstAmrwbParseClass * klass);
+
+static const GstQueryType *gst_amrwbparse_querytypes (GstPad * pad);
+static gboolean gst_amrwbparse_query (GstPad * pad, GstQuery * query);
+
+static GstFlowReturn gst_amrwbparse_chain (GstPad * pad, GstBuffer * buffer);
+static void gst_amrwbparse_loop (GstPad * pad);
+static gboolean gst_amrwbparse_sink_activate (GstPad * sinkpad);
+static gboolean gst_amrwbparse_sink_activate_pull (GstPad * sinkpad,
+    gboolean active);
+static GstStateChangeReturn gst_amrwbparse_state_change (GstElement * element,
+    GstStateChange transition);
+
+GST_BOILERPLATE (GstAmrwbParse, gst_amrwbparse, GstElement, GST_TYPE_ELEMENT);
+
+static void
+gst_amrwbparse_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_set_details (element_class, &gst_amrwbparse_details);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+
+}
+
+static void
+gst_amrwbparse_class_init (GstAmrwbParseClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  element_class->change_state = gst_amrwbparse_state_change;
+
+  GST_DEBUG_CATEGORY_INIT (amrwbparse_debug,
+      "amrwbparse", 0, "AMR-WB stream parsing");
+}
+
+static void
+gst_amrwbparse_init (GstAmrwbParse * amrwbparse, GstAmrwbParseClass * klass)
+{
+  /* create the sink pad */
+  amrwbparse->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_pad_set_chain_function (amrwbparse->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_amrwbparse_chain));
+
+  gst_pad_set_activate_function (amrwbparse->sinkpad,
+      gst_amrwbparse_sink_activate);
+  gst_pad_set_activatepull_function (amrwbparse->sinkpad,
+      gst_amrwbparse_sink_activate_pull);
+
+  gst_element_add_pad (GST_ELEMENT (amrwbparse), amrwbparse->sinkpad);
+
+  /* create the src pad */
+  amrwbparse->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_pad_set_query_function (amrwbparse->srcpad,
+      GST_DEBUG_FUNCPTR (gst_amrwbparse_query));
+  gst_pad_set_query_type_function (amrwbparse->srcpad,
+      GST_DEBUG_FUNCPTR (gst_amrwbparse_querytypes));
+  gst_element_add_pad (GST_ELEMENT (amrwbparse), amrwbparse->srcpad);
+
+  amrwbparse->adapter = gst_adapter_new ();
+
+  /* init rest */
+  amrwbparse->ts = 0;
+}
+
+static const GstQueryType *
+gst_amrwbparse_querytypes (GstPad * pad)
+{
+  static const GstQueryType list[] = {
+    GST_QUERY_POSITION,
+    0
+  };
+
+  return list;
+}
+
+static gboolean
+gst_amrwbparse_query (GstPad * pad, GstQuery * query)
+{
+  GstAmrwbParse *amrwbparse;
+  gboolean res = TRUE;
+
+  amrwbparse = GST_AMRWBPARSE (GST_PAD_PARENT (pad));
+
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_POSITION:
+    {
+      GstFormat format;
+      gint64 cur;
+
+      gst_query_parse_position (query, &format, NULL);
+
+      if (format != GST_FORMAT_TIME) {
+        res = FALSE;
+        break;
+      }
+
+      cur = amrwbparse->ts;
+
+      gst_query_set_position (query, GST_FORMAT_TIME, cur);
+      res = TRUE;
+      break;
+    }
+    case GST_QUERY_DURATION:
+    {
+      GstFormat format;
+      gint64 tot;
+      GstPad *peer;
+
+      gst_query_parse_duration (query, &format, NULL);
+
+      if (format != GST_FORMAT_TIME) {
+        res = FALSE;
+        break;
+      }
+
+      tot = -1;
+
+      peer = gst_pad_get_peer (amrwbparse->sinkpad);
+      if (peer) {
+        GstFormat pformat;
+        gint64 pcur, ptot;
+
+        pformat = GST_FORMAT_BYTES;
+        res = gst_pad_query_position (peer, &pformat, &pcur);
+        res = gst_pad_query_duration (peer, &pformat, &ptot);
+        gst_object_unref (GST_OBJECT (peer));
+        if (res) {
+          tot = amrwbparse->ts * ((gdouble) ptot / pcur);
+        }
+      }
+      gst_query_set_duration (query, GST_FORMAT_TIME, tot);
+      res = TRUE;
+      break;
+    }
+    default:
+      res = gst_pad_query_default (pad, query);
+      break;
+  }
+
+  gst_object_unref (amrwbparse);
+  return res;
+}
+
+
+/*
+ * Data reading.
+ */
+
+/* streaming mode */
+static GstFlowReturn
+gst_amrwbparse_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstAmrwbParse *amrwbparse;
+  GstFlowReturn res = GST_FLOW_OK;
+  gint block, mode;
+  const guint8 *data;
+  GstBuffer *out;
+
+  amrwbparse = GST_AMRWBPARSE (gst_pad_get_parent (pad));
+
+  gst_adapter_push (amrwbparse->adapter, buffer);
+
+  /* init */
+  if (amrwbparse->need_header) {
+
+    if (gst_adapter_available (amrwbparse->adapter) < 9)
+      goto done;
+
+    data = gst_adapter_peek (amrwbparse->adapter, 9);
+    if (memcmp (data, "#!AMR-WB\n", 9) != 0)
+      goto done;
+
+    gst_adapter_flush (amrwbparse->adapter, 9);
+
+    amrwbparse->need_header = FALSE;
+  }
+
+  while (TRUE) {
+    if (gst_adapter_available (amrwbparse->adapter) < 1)
+      break;
+
+    data = gst_adapter_peek (amrwbparse->adapter, 1);
+
+    /* get size */
+    mode = (data[0] >> 3) & 0x0F;
+    block = block_size[mode] + 1;       /* add one for the mode */
+
+    if (gst_adapter_available (amrwbparse->adapter) < block)
+      break;
+
+    out = gst_buffer_new_and_alloc (block);
+
+    data = gst_adapter_peek (amrwbparse->adapter, block);
+    memcpy (GST_BUFFER_DATA (out), data, block);
+
+    /* output */
+    GST_BUFFER_DURATION (out) = GST_SECOND * L_FRAME16k / 16000;
+    GST_BUFFER_TIMESTAMP (out) = amrwbparse->ts;
+    amrwbparse->ts += GST_BUFFER_DURATION (out);
+    gst_buffer_set_caps (out,
+        (GstCaps *) gst_pad_get_pad_template_caps (amrwbparse->srcpad));
+
+    res = gst_pad_push (amrwbparse->srcpad, out);
+
+    gst_adapter_flush (amrwbparse->adapter, block);
+  }
+done:
+
+  gst_object_unref (amrwbparse);
+  return res;
+}
+
+static gboolean
+gst_amrwbparse_read_header (GstAmrwbParse * amrwbparse)
+{
+  GstBuffer *buffer;
+  gboolean ret = TRUE;
+  guint8 *data;
+  gint size;
+  const guint8 magic_number_size = 9;   /* sizeof("#!AMR-WB\n")-1 */
+
+  if (GST_FLOW_OK != gst_pad_pull_range (amrwbparse->sinkpad,
+          amrwbparse->offset, magic_number_size, &buffer)) {
+    ret = FALSE;
+    goto done;
+  }
+
+
+  data = GST_BUFFER_DATA (buffer);
+  size = GST_BUFFER_SIZE (buffer);
+
+  if (size < magic_number_size) {
+    /* not enough */
+    ret = FALSE;
+    goto done;
+  }
+
+  if (memcmp (data, "#!AMR-WB\n", magic_number_size)) {
+    /* no header */
+    ret = FALSE;
+    goto done;
+  }
+
+  amrwbparse->offset += magic_number_size;
+
+done:
+
+  gst_buffer_unref (buffer);
+  return ret;
+
+}
+
+/* random access mode, could just read a fixed size buffer and push it to
+ * the chain function but we don't... */
+static void
+gst_amrwbparse_loop (GstPad * pad)
+{
+  GstAmrwbParse *amrwbparse;
+  GstBuffer *buffer;
+  guint8 *data;
+  gint size;
+  gint block, mode;
+  GstFlowReturn ret = GST_FLOW_OK;
+
+  amrwbparse = GST_AMRWBPARSE (gst_pad_get_parent (pad));
+
+  /* init */
+  if (amrwbparse->need_header) {
+    gboolean got_header;
+
+    got_header = gst_amrwbparse_read_header (amrwbparse);
+    if (!got_header) {
+      GST_LOG_OBJECT (amrwbparse, "could not read header");
+      goto need_pause;
+    }
+    amrwbparse->need_header = FALSE;
+  }
+
+  ret = gst_pad_pull_range (amrwbparse->sinkpad,
+      amrwbparse->offset, 1, &buffer);
+
+  if (ret != GST_FLOW_OK)
+    goto eos;
+
+  data = GST_BUFFER_DATA (buffer);
+  size = GST_BUFFER_SIZE (buffer);
+
+  /* get size */
+  mode = (data[0] >> 3) & 0x0F;
+  block = block_size[mode];     /* add one for the mode */
+
+  gst_buffer_unref (buffer);
+
+  ret = gst_pad_pull_range (amrwbparse->sinkpad,
+      amrwbparse->offset, block, &buffer);
+
+  if (ret != GST_FLOW_OK)
+    goto need_pause;
+
+  amrwbparse->offset += block;
+
+  /* output */
+  GST_BUFFER_DURATION (buffer) = GST_SECOND * L_FRAME16k / 16000;
+  GST_BUFFER_TIMESTAMP (buffer) = amrwbparse->ts;
+  amrwbparse->ts += GST_BUFFER_DURATION (buffer);
+  gst_buffer_set_caps (buffer,
+      (GstCaps *) gst_pad_get_pad_template_caps (amrwbparse->srcpad));
+
+  ret = gst_pad_push (amrwbparse->srcpad, buffer);
+  if (ret != GST_FLOW_OK)
+    goto need_pause;
+
+  goto done;
+
+eos:
+  if (ret == GST_FLOW_UNEXPECTED) {
+    gst_pad_push_event (amrwbparse->srcpad, gst_event_new_eos ());
+    gst_pad_pause_task (pad);
+    goto done;
+  } else {
+    GST_LOG_OBJECT (amrwbparse, "pausing task %d", ret);
+    gst_pad_pause_task (pad);
+    goto done;
+  }
+
+need_pause:
+  GST_LOG_OBJECT (amrwbparse, "pausing task");
+  gst_pad_pause_task (pad);
+  goto done;
+
+done:
+
+  gst_object_unref (amrwbparse);
+
+}
+
+static gboolean
+gst_amrwbparse_sink_activate (GstPad * sinkpad)
+{
+  GstAmrwbParse *amrwbparse;
+
+  amrwbparse = GST_AMRWBPARSE (GST_PAD_PARENT (sinkpad));
+  if (gst_pad_check_pull_range (sinkpad)) {
+    return gst_pad_activate_pull (sinkpad, TRUE);
+  } else {
+    amrwbparse->seekable = FALSE;
+    return gst_pad_activate_push (sinkpad, TRUE);
+  }
+}
+
+
+static gboolean
+gst_amrwbparse_sink_activate_pull (GstPad * sinkpad, gboolean active)
+{
+  gboolean result;
+  GstAmrwbParse *amrwbparse;
+
+  amrwbparse = GST_AMRWBPARSE (GST_PAD_PARENT (sinkpad));
+  if (active) {
+    amrwbparse->need_header = TRUE;
+    amrwbparse->seekable = TRUE;
+    amrwbparse->ts = 0;
+    /* if we have a scheduler we can start the task */
+    result = gst_pad_start_task (sinkpad,
+        (GstTaskFunction) gst_amrwbparse_loop, sinkpad);
+  } else {
+    result = gst_pad_stop_task (sinkpad);
+  }
+
+  return result;
+}
+
+
+static GstStateChangeReturn
+gst_amrwbparse_state_change (GstElement * element, GstStateChange transition)
+{
+  GstAmrwbParse *amrwbparse;
+  GstStateChangeReturn ret;
+
+  amrwbparse = GST_AMRWBPARSE (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_PAUSED_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+
+  return ret;
+}
diff --git a/ext/amrwb/gstamrwbparse.h b/ext/amrwb/gstamrwbparse.h
new file mode 100644
index 00000000..d2da5741
--- /dev/null
+++ b/ext/amrwb/gstamrwbparse.h
@@ -0,0 +1,65 @@
+/* GStreamer Adaptive Multi-Rate Wide-Band (AMR-WB) plugin
+ * Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
+ *
+ * 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_AMRWBPARSE_H__
+#define __GST_AMRWBPARSE_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstadapter.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_AMRWBPARSE			\
+  (gst_amrwbparse_get_type())
+#define GST_AMRWBPARSE(obj)						\
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_AMRWBPARSE, GstAmrwbParse))
+#define GST_AMRWBPARSE_CLASS(klass)					\
+  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_AMRWBPARSE, GstAmrwbParse))
+#define GST_IS_AMRWBPARSE(obj)					\
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_AMRWBPARSE))
+#define GST_IS_AMRWBPARSE_CLASS(obj)				\
+  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_AMRWBPARSE))
+
+typedef struct _GstAmrwbParse GstAmrwbParse;
+typedef struct _GstAmrwbParseClass GstAmrwbParseClass;
+
+struct _GstAmrwbParse {
+  GstElement element;
+
+  /* pads */
+  GstPad *sinkpad, *srcpad;
+
+  GstAdapter *adapter;
+
+  gboolean seekable;
+  gboolean need_header;
+  gint64 offset;
+
+  guint64 ts;
+};
+
+struct _GstAmrwbParseClass {
+  GstElementClass parent_class;
+};
+
+GType gst_amrwbparse_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_AMRWBPARSE_H__ */