G711 payloader and depayloader created by Edgard Lima (it supports mulaw and alaw (dec)encoders)

Original commit message from CVS:
G711 payloader and depayloader created by Edgard Lima (it supports
mulaw and alaw (dec)encoders)

ChangeLog

@@ -1,3 +1,14 @@
+2005-10-25  Edgard Lima  <edgard.lima@indt.org.br>
+
+	* gst/rtp/Makefile.am
+	* gst/rtp/gstrtp.c
+	* gst/rtp/gstrtpg711enc.c
+	* gst/rtp/gstrtpg711enc.h
+	* gst/rtp/gstrtpg711dec.c
+	* gst/rtp/gstrtpg711dec.h
+	Created G711 payloader and depayloader (it supports mulaw and alaw
+	(dec)encoders)
+
 2005-10-25  Julien MOUTTE  <julien@moutte.net>
 
 	* gst/videobox/gstvideobox.c: (gst_video_box_class_init),

gst/rtp/Makefile.am

@@ -4,6 +4,8 @@ libgstrtp_la_SOURCES = gstrtp.c \
 		       gstrtpdec.c \
 		       gstrtpmpadec.c \
 		       gstrtpmpaenc.c \
+		       gstrtpg711enc.c \
+		       gstrtpg711dec.c \		       
 		       gstrtpgsmenc.c \
 		       gstrtpgsmparse.c \
 		       gstrtpamrdec.c \
@@ -26,6 +28,8 @@ noinst_HEADERS = gstrtpL16enc.h 	\
 		 gstrtpL16parse.h 	\
 		 gstrtpamrdec.h 	\
 		 gstrtpamrenc.h 	\
+		 gstrtpg711enc.h 	\
+		 gstrtpg711dec.h 	\		 
 		 gstrtpgsmenc.h 	\
 		 gstrtpgsmparse.h 	\
 		 gstrtpmpadec.h 	\

gst/rtp/gstrtp.c

@@ -22,6 +22,8 @@
 #endif
 
 #include "gstrtpdec.h"
+#include "gstrtpg711enc.h"
+#include "gstrtpg711dec.h"
 #include "gstrtpgsmenc.h"
 #include "gstrtpgsmparse.h"
 #include "gstrtpamrenc.h"
@@ -53,6 +55,12 @@ plugin_init (GstPlugin * plugin)
   if (!gst_rtpamrenc_plugin_init (plugin))
     return FALSE;
 
+  if (!gst_rtpg711dec_plugin_init (plugin))
+    return FALSE;
+
+  if (!gst_rtpg711enc_plugin_init (plugin))
+    return FALSE;
+
   if (!gst_rtpmpadec_plugin_init (plugin))
     return FALSE;
 

gst/rtp/gstrtpg711dec.c

@@ -0,0 +1,307 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+#include "gstrtpg711dec.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_g711dec_details = {
+  "RTP packet parser",
+  "Codec/Parser/Network",
+  "Extracts PCMU/PCMA audio from RTP packets",
+  "Edgard Lima <edgard.lima@indt.org.br>"
+};
+
+/* RtpG711Dec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+};
+
+static GstStaticPadTemplate gst_rtpg711dec_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 0, "
+        "clock-rate = (int) 8000, "
+        "encoding-name = (string) \"PCMU\"; "
+        "application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 8, "
+        "clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
+
+    );
+
+static GstStaticPadTemplate gst_rtpg711dec_src_template =
+    GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-mulaw, channels = (int) 1; "
+        "audio/x-alaw, channels = (int) 1")
+    );
+
+static void gst_rtpg711dec_class_init (GstRtpG711DecClass * klass);
+static void gst_rtpg711dec_base_init (GstRtpG711DecClass * klass);
+static void gst_rtpg711dec_init (GstRtpG711Dec * rtpg711dec);
+static gboolean gst_rtpg711dec_sink_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_rtpg711dec_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtpg711dec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtpg711dec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtpg711dec_change_state (GstElement * element,
+    GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtpg711dec_get_type (void)
+{
+  static GType rtpg711dec_type = 0;
+
+  if (!rtpg711dec_type) {
+    static const GTypeInfo rtpg711dec_info = {
+      sizeof (GstRtpG711DecClass),
+      (GBaseInitFunc) gst_rtpg711dec_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpg711dec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpG711Dec),
+      0,
+      (GInstanceInitFunc) gst_rtpg711dec_init,
+    };
+
+    rtpg711dec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstRtpG711Dec",
+        &rtpg711dec_info, 0);
+  }
+  return rtpg711dec_type;
+}
+
+static void
+gst_rtpg711dec_base_init (GstRtpG711DecClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711dec_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711dec_sink_template));
+  gst_element_class_set_details (element_class, &gst_rtp_g711dec_details);
+}
+
+static void
+gst_rtpg711dec_class_init (GstRtpG711DecClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gobject_class->set_property = gst_rtpg711dec_set_property;
+  gobject_class->get_property = gst_rtpg711dec_get_property;
+
+  gstelement_class->change_state = gst_rtpg711dec_change_state;
+}
+
+static void
+gst_rtpg711dec_init (GstRtpG711Dec * rtpg711dec)
+{
+  rtpg711dec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpg711dec_src_template), "src");
+  rtpg711dec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpg711dec_sink_template), "sink");
+  gst_element_add_pad (GST_ELEMENT (rtpg711dec), rtpg711dec->srcpad);
+
+  gst_pad_set_setcaps_function (rtpg711dec->sinkpad,
+      gst_rtpg711dec_sink_setcaps);
+  gst_element_add_pad (GST_ELEMENT (rtpg711dec), rtpg711dec->sinkpad);
+  gst_pad_set_chain_function (rtpg711dec->sinkpad, gst_rtpg711dec_chain);
+}
+
+static gboolean
+gst_rtpg711dec_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstCaps *srccaps;
+  GstRtpG711Dec *rtpg711dec;
+  const gchar *enc_name;
+  GstStructure *structure;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  enc_name = gst_structure_get_name (structure);
+
+  enc_name = gst_structure_get_string (structure, "encoding-name");
+
+  if (NULL == enc_name) {
+    return FALSE;
+  }
+
+  if (0 == strcmp ("PCMU", enc_name)) {
+    srccaps = gst_caps_new_simple ("audio/x-mulaw",
+        "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  } else if (0 == strcmp ("PCMA", enc_name)) {
+    srccaps = gst_caps_new_simple ("audio/x-alaw",
+        "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  } else {
+    return FALSE;
+  }
+
+  rtpg711dec = GST_RTP_G711_DEC (GST_OBJECT_PARENT (pad));
+
+  srccaps = gst_caps_new_simple ("audio/x-mulaw",
+      "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  gst_pad_set_caps (rtpg711dec->srcpad, srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtpg711dec_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstRtpG711Dec *rtpg711dec;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+
+  rtpg711dec = GST_RTP_G711_DEC (gst_pad_get_parent (pad));
+
+  if (!gst_rtpbuffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint32 timestamp;
+    static guint32 firstTS = -1;
+
+    payload_len = gst_rtpbuffer_get_payload_len (buf);
+    payload = gst_rtpbuffer_get_payload (buf);
+
+    timestamp = gst_rtpbuffer_get_timestamp (buf);
+
+    if (firstTS == -1) {
+      firstTS = gst_rtpbuffer_get_timestamp (buf);
+    }
+    timestamp = gst_rtpbuffer_get_timestamp (buf) - firstTS;
+
+    outbuf = gst_buffer_new_and_alloc (payload_len);
+
+    GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / 8000;
+
+    memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+    GST_DEBUG ("pushing buffer of size %d", GST_BUFFER_SIZE (outbuf));
+
+    gst_buffer_set_caps (outbuf, GST_PAD_CAPS (rtpg711dec->srcpad));
+    gst_buffer_unref (buf);
+
+    ret = gst_pad_push (rtpg711dec->srcpad, outbuf);
+  }
+
+  return ret;
+
+bad_packet:
+  {
+    GST_DEBUG ("Packet did not validate");
+    gst_buffer_unref (buf);
+    return GST_FLOW_ERROR;
+  }
+}
+
+static void
+gst_rtpg711dec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpG711Dec *rtpg711dec;
+
+  rtpg711dec = GST_RTP_G711_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtpg711dec_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpG711Dec *rtpg711dec;
+
+  rtpg711dec = GST_RTP_G711_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtpg711dec_change_state (GstElement * element, GstStateChange transition)
+{
+  GstRtpG711Dec *rtpg711dec;
+  GstStateChangeReturn ret;
+
+  rtpg711dec = GST_RTP_G711_DEC (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_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+  return ret;
+}
+
+gboolean
+gst_rtpg711dec_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpg711dec",
+      GST_RANK_NONE, GST_TYPE_RTP_G711_DEC);
+}

gst/rtp/gstrtpg711dec.h

@@ -0,0 +1,53 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+ 
+#ifndef __GST_RTP_G711_DEC_H__
+#define __GST_RTP_G711_DEC_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstRtpG711Dec GstRtpG711Dec;
+typedef struct _GstRtpG711DecClass GstRtpG711DecClass;
+
+#define GST_TYPE_RTP_G711_DEC \
+  (gst_rtpg711dec_get_type())
+#define GST_RTP_G711_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_G711_DEC,GstRtpG711Dec))
+#define GST_RTP_G711_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_G711_DEC,GstRtpG711Dec))
+#define GST_IS_RTP_G711_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_G711_DEC))
+#define GST_IS_RTP_G711_DEC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_G711_DEC))
+
+struct _GstRtpG711Dec
+{
+  GstElement element;
+
+  GstPad *sinkpad;
+  GstPad *srcpad;
+};
+
+struct _GstRtpG711DecClass
+{
+  GstElementClass parent_class;
+};
+
+gboolean gst_rtpg711dec_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_G711_DEC_H__ */

gst/rtp/gstrtpg711depay.c

@@ -0,0 +1,307 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+#include "gstrtpg711dec.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_g711dec_details = {
+  "RTP packet parser",
+  "Codec/Parser/Network",
+  "Extracts PCMU/PCMA audio from RTP packets",
+  "Edgard Lima <edgard.lima@indt.org.br>"
+};
+
+/* RtpG711Dec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+};
+
+static GstStaticPadTemplate gst_rtpg711dec_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 0, "
+        "clock-rate = (int) 8000, "
+        "encoding-name = (string) \"PCMU\"; "
+        "application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 8, "
+        "clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
+
+    );
+
+static GstStaticPadTemplate gst_rtpg711dec_src_template =
+    GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-mulaw, channels = (int) 1; "
+        "audio/x-alaw, channels = (int) 1")
+    );
+
+static void gst_rtpg711dec_class_init (GstRtpG711DecClass * klass);
+static void gst_rtpg711dec_base_init (GstRtpG711DecClass * klass);
+static void gst_rtpg711dec_init (GstRtpG711Dec * rtpg711dec);
+static gboolean gst_rtpg711dec_sink_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_rtpg711dec_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtpg711dec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtpg711dec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtpg711dec_change_state (GstElement * element,
+    GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtpg711dec_get_type (void)
+{
+  static GType rtpg711dec_type = 0;
+
+  if (!rtpg711dec_type) {
+    static const GTypeInfo rtpg711dec_info = {
+      sizeof (GstRtpG711DecClass),
+      (GBaseInitFunc) gst_rtpg711dec_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpg711dec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpG711Dec),
+      0,
+      (GInstanceInitFunc) gst_rtpg711dec_init,
+    };
+
+    rtpg711dec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstRtpG711Dec",
+        &rtpg711dec_info, 0);
+  }
+  return rtpg711dec_type;
+}
+
+static void
+gst_rtpg711dec_base_init (GstRtpG711DecClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711dec_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711dec_sink_template));
+  gst_element_class_set_details (element_class, &gst_rtp_g711dec_details);
+}
+
+static void
+gst_rtpg711dec_class_init (GstRtpG711DecClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gobject_class->set_property = gst_rtpg711dec_set_property;
+  gobject_class->get_property = gst_rtpg711dec_get_property;
+
+  gstelement_class->change_state = gst_rtpg711dec_change_state;
+}
+
+static void
+gst_rtpg711dec_init (GstRtpG711Dec * rtpg711dec)
+{
+  rtpg711dec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpg711dec_src_template), "src");
+  rtpg711dec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpg711dec_sink_template), "sink");
+  gst_element_add_pad (GST_ELEMENT (rtpg711dec), rtpg711dec->srcpad);
+
+  gst_pad_set_setcaps_function (rtpg711dec->sinkpad,
+      gst_rtpg711dec_sink_setcaps);
+  gst_element_add_pad (GST_ELEMENT (rtpg711dec), rtpg711dec->sinkpad);
+  gst_pad_set_chain_function (rtpg711dec->sinkpad, gst_rtpg711dec_chain);
+}
+
+static gboolean
+gst_rtpg711dec_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstCaps *srccaps;
+  GstRtpG711Dec *rtpg711dec;
+  const gchar *enc_name;
+  GstStructure *structure;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  enc_name = gst_structure_get_name (structure);
+
+  enc_name = gst_structure_get_string (structure, "encoding-name");
+
+  if (NULL == enc_name) {
+    return FALSE;
+  }
+
+  if (0 == strcmp ("PCMU", enc_name)) {
+    srccaps = gst_caps_new_simple ("audio/x-mulaw",
+        "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  } else if (0 == strcmp ("PCMA", enc_name)) {
+    srccaps = gst_caps_new_simple ("audio/x-alaw",
+        "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  } else {
+    return FALSE;
+  }
+
+  rtpg711dec = GST_RTP_G711_DEC (GST_OBJECT_PARENT (pad));
+
+  srccaps = gst_caps_new_simple ("audio/x-mulaw",
+      "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+  gst_pad_set_caps (rtpg711dec->srcpad, srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtpg711dec_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstRtpG711Dec *rtpg711dec;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+
+  rtpg711dec = GST_RTP_G711_DEC (gst_pad_get_parent (pad));
+
+  if (!gst_rtpbuffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint32 timestamp;
+    static guint32 firstTS = -1;
+
+    payload_len = gst_rtpbuffer_get_payload_len (buf);
+    payload = gst_rtpbuffer_get_payload (buf);
+
+    timestamp = gst_rtpbuffer_get_timestamp (buf);
+
+    if (firstTS == -1) {
+      firstTS = gst_rtpbuffer_get_timestamp (buf);
+    }
+    timestamp = gst_rtpbuffer_get_timestamp (buf) - firstTS;
+
+    outbuf = gst_buffer_new_and_alloc (payload_len);
+
+    GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / 8000;
+
+    memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+    GST_DEBUG ("pushing buffer of size %d", GST_BUFFER_SIZE (outbuf));
+
+    gst_buffer_set_caps (outbuf, GST_PAD_CAPS (rtpg711dec->srcpad));
+    gst_buffer_unref (buf);
+
+    ret = gst_pad_push (rtpg711dec->srcpad, outbuf);
+  }
+
+  return ret;
+
+bad_packet:
+  {
+    GST_DEBUG ("Packet did not validate");
+    gst_buffer_unref (buf);
+    return GST_FLOW_ERROR;
+  }
+}
+
+static void
+gst_rtpg711dec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpG711Dec *rtpg711dec;
+
+  rtpg711dec = GST_RTP_G711_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtpg711dec_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpG711Dec *rtpg711dec;
+
+  rtpg711dec = GST_RTP_G711_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtpg711dec_change_state (GstElement * element, GstStateChange transition)
+{
+  GstRtpG711Dec *rtpg711dec;
+  GstStateChangeReturn ret;
+
+  rtpg711dec = GST_RTP_G711_DEC (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_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+  return ret;
+}
+
+gboolean
+gst_rtpg711dec_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpg711dec",
+      GST_RANK_NONE, GST_TYPE_RTP_G711_DEC);
+}

gst/rtp/gstrtpg711depay.h

@@ -0,0 +1,53 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+ 
+#ifndef __GST_RTP_G711_DEC_H__
+#define __GST_RTP_G711_DEC_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstRtpG711Dec GstRtpG711Dec;
+typedef struct _GstRtpG711DecClass GstRtpG711DecClass;
+
+#define GST_TYPE_RTP_G711_DEC \
+  (gst_rtpg711dec_get_type())
+#define GST_RTP_G711_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_G711_DEC,GstRtpG711Dec))
+#define GST_RTP_G711_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_G711_DEC,GstRtpG711Dec))
+#define GST_IS_RTP_G711_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_G711_DEC))
+#define GST_IS_RTP_G711_DEC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_G711_DEC))
+
+struct _GstRtpG711Dec
+{
+  GstElement element;
+
+  GstPad *sinkpad;
+  GstPad *srcpad;
+};
+
+struct _GstRtpG711DecClass
+{
+  GstElementClass parent_class;
+};
+
+gboolean gst_rtpg711dec_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_G711_DEC_H__ */

gst/rtp/gstrtpg711enc.c

@@ -0,0 +1,198 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpg711enc.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtpg711enc_details = {
+  "RTP packet parser",
+  "Codec/Encoder/Network",
+  "Encodes PCMU/PCMA audio into a RTP packet",
+  "Edgard Lima <edgard.lima@indt.org.br>"
+};
+
+static GstStaticPadTemplate gst_rtpg711enc_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-mulaw, channels=(int)1, rate=(int)8000 ;"
+        "audio/x-alaw, channels=(int)1, rate=(int)8000")
+    );
+
+static GstStaticPadTemplate gst_rtpg711enc_src_template =
+    GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 0, "
+        "clock-rate = (int) 8000, "
+        "encoding-name = (string) \"PCMU\"; "
+        "application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 8, "
+        "clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
+    );
+
+
+static void gst_rtpg711enc_class_init (GstRtpG711EncClass * klass);
+static void gst_rtpg711enc_base_init (GstRtpG711EncClass * klass);
+static void gst_rtpg711enc_init (GstRtpG711Enc * rtpg711enc);
+
+static gboolean gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload,
+    GstCaps * caps);
+static GstFlowReturn gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * payload,
+    GstBuffer * buffer);
+
+static GstBaseRTPPayloadClass *parent_class = NULL;
+
+static GType
+gst_rtpg711enc_get_type (void)
+{
+  static GType rtpg711enc_type = 0;
+
+  if (!rtpg711enc_type) {
+    static const GTypeInfo rtpg711enc_info = {
+      sizeof (GstRtpG711EncClass),
+      (GBaseInitFunc) gst_rtpg711enc_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpg711enc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpG711Enc),
+      0,
+      (GInstanceInitFunc) gst_rtpg711enc_init,
+    };
+
+    rtpg711enc_type =
+        g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpG711Enc",
+        &rtpg711enc_info, 0);
+  }
+  return rtpg711enc_type;
+}
+
+static void
+gst_rtpg711enc_base_init (GstRtpG711EncClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711enc_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711enc_src_template));
+  gst_element_class_set_details (element_class, &gst_rtpg711enc_details);
+}
+
+static void
+gst_rtpg711enc_class_init (GstRtpG711EncClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPPayloadClass *gstbasertppayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD);
+
+  gstbasertppayload_class->set_caps = gst_rtpg711enc_setcaps;
+  gstbasertppayload_class->handle_buffer = gst_rtpg711enc_handle_buffer;
+}
+
+static void
+gst_rtpg711enc_init (GstRtpG711Enc * rtpg711enc)
+{
+}
+
+static gboolean
+gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
+{
+
+  const char *stname;
+  GstStructure *structure;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  stname = gst_structure_get_name (structure);
+
+  if (0 == strcmp ("audio/x-mulaw", stname)) {
+    gst_basertppayload_set_options (payload, "audio", TRUE, "PCMU", 8000);
+  } else if (0 == strcmp ("audio/x-alaw", stname)) {
+    gst_basertppayload_set_options (payload, "audio", TRUE, "PCMA", 8000);
+  } else {
+    return FALSE;
+  }
+
+  gst_basertppayload_set_outcaps (payload, NULL);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * basepayload,
+    GstBuffer * buffer)
+{
+  GstRtpG711Enc *rtpg711enc;
+  guint size, payload_len;
+  GstBuffer *outbuf;
+  guint8 *payload, *data;
+  GstClockTime timestamp;
+  GstFlowReturn ret;
+
+  rtpg711enc = GST_RTP_G711_ENC (basepayload);
+
+  size = GST_BUFFER_SIZE (buffer);
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+
+  /* FIXME, only one G711 frame per RTP packet for now */
+  payload_len = size;
+
+  outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
+  /* FIXME, assert for now */
+  g_assert (GST_BUFFER_SIZE (outbuf) < GST_BASE_RTP_PAYLOAD_MTU (rtpg711enc));
+
+  gst_rtpbuffer_set_timestamp (outbuf, timestamp * 8000 / GST_SECOND);
+
+  /* copy timestamp */
+  GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
+  /* get payload */
+  payload = gst_rtpbuffer_get_payload (outbuf);
+
+  data = GST_BUFFER_DATA (buffer);
+
+  /* copy data in payload */
+  memcpy (&payload[0], data, size);
+
+  gst_buffer_unref (buffer);
+
+  ret = gst_basertppayload_push (basepayload, outbuf);
+
+  return ret;
+}
+
+gboolean
+gst_rtpg711enc_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpg711enc",
+      GST_RANK_NONE, GST_TYPE_RTP_G711_ENC);
+}

gst/rtp/gstrtpg711enc.h

@@ -0,0 +1,54 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+
+#ifndef __GST_RTP_G711_ENC_H__
+#define __GST_RTP_G711_ENC_H__
+
+#include <gst/gst.h>
+#include <gst/rtp/gstbasertppayload.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstRtpG711Enc GstRtpG711Enc;
+typedef struct _GstRtpG711EncClass GstRtpG711EncClass;
+
+#define GST_TYPE_RTP_G711_ENC \
+  (gst_rtpg711enc_get_type())
+#define GST_RTP_G711_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_G711_ENC,GstRtpG711Enc))
+#define GST_RTP_G711_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_G711_ENC,GstRtpG711Enc))
+#define GST_IS_RTP_G711_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_G711_ENC))
+#define GST_IS_RTP_G711_ENC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_G711_ENC))
+
+struct _GstRtpG711Enc
+{
+  GstBaseRTPPayload payload;
+
+  gint frequency;
+};
+
+struct _GstRtpG711EncClass
+{
+  GstBaseRTPPayloadClass parent_class;
+};
+
+gboolean gst_rtpg711enc_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_G711_ENC_H__ */

gst/rtp/gstrtpg711pay.c

@@ -0,0 +1,198 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpg711enc.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtpg711enc_details = {
+  "RTP packet parser",
+  "Codec/Encoder/Network",
+  "Encodes PCMU/PCMA audio into a RTP packet",
+  "Edgard Lima <edgard.lima@indt.org.br>"
+};
+
+static GstStaticPadTemplate gst_rtpg711enc_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-mulaw, channels=(int)1, rate=(int)8000 ;"
+        "audio/x-alaw, channels=(int)1, rate=(int)8000")
+    );
+
+static GstStaticPadTemplate gst_rtpg711enc_src_template =
+    GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 0, "
+        "clock-rate = (int) 8000, "
+        "encoding-name = (string) \"PCMU\"; "
+        "application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) 8, "
+        "clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
+    );
+
+
+static void gst_rtpg711enc_class_init (GstRtpG711EncClass * klass);
+static void gst_rtpg711enc_base_init (GstRtpG711EncClass * klass);
+static void gst_rtpg711enc_init (GstRtpG711Enc * rtpg711enc);
+
+static gboolean gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload,
+    GstCaps * caps);
+static GstFlowReturn gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * payload,
+    GstBuffer * buffer);
+
+static GstBaseRTPPayloadClass *parent_class = NULL;
+
+static GType
+gst_rtpg711enc_get_type (void)
+{
+  static GType rtpg711enc_type = 0;
+
+  if (!rtpg711enc_type) {
+    static const GTypeInfo rtpg711enc_info = {
+      sizeof (GstRtpG711EncClass),
+      (GBaseInitFunc) gst_rtpg711enc_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpg711enc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpG711Enc),
+      0,
+      (GInstanceInitFunc) gst_rtpg711enc_init,
+    };
+
+    rtpg711enc_type =
+        g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpG711Enc",
+        &rtpg711enc_info, 0);
+  }
+  return rtpg711enc_type;
+}
+
+static void
+gst_rtpg711enc_base_init (GstRtpG711EncClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711enc_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpg711enc_src_template));
+  gst_element_class_set_details (element_class, &gst_rtpg711enc_details);
+}
+
+static void
+gst_rtpg711enc_class_init (GstRtpG711EncClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPPayloadClass *gstbasertppayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD);
+
+  gstbasertppayload_class->set_caps = gst_rtpg711enc_setcaps;
+  gstbasertppayload_class->handle_buffer = gst_rtpg711enc_handle_buffer;
+}
+
+static void
+gst_rtpg711enc_init (GstRtpG711Enc * rtpg711enc)
+{
+}
+
+static gboolean
+gst_rtpg711enc_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
+{
+
+  const char *stname;
+  GstStructure *structure;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  stname = gst_structure_get_name (structure);
+
+  if (0 == strcmp ("audio/x-mulaw", stname)) {
+    gst_basertppayload_set_options (payload, "audio", TRUE, "PCMU", 8000);
+  } else if (0 == strcmp ("audio/x-alaw", stname)) {
+    gst_basertppayload_set_options (payload, "audio", TRUE, "PCMA", 8000);
+  } else {
+    return FALSE;
+  }
+
+  gst_basertppayload_set_outcaps (payload, NULL);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtpg711enc_handle_buffer (GstBaseRTPPayload * basepayload,
+    GstBuffer * buffer)
+{
+  GstRtpG711Enc *rtpg711enc;
+  guint size, payload_len;
+  GstBuffer *outbuf;
+  guint8 *payload, *data;
+  GstClockTime timestamp;
+  GstFlowReturn ret;
+
+  rtpg711enc = GST_RTP_G711_ENC (basepayload);
+
+  size = GST_BUFFER_SIZE (buffer);
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+
+  /* FIXME, only one G711 frame per RTP packet for now */
+  payload_len = size;
+
+  outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
+  /* FIXME, assert for now */
+  g_assert (GST_BUFFER_SIZE (outbuf) < GST_BASE_RTP_PAYLOAD_MTU (rtpg711enc));
+
+  gst_rtpbuffer_set_timestamp (outbuf, timestamp * 8000 / GST_SECOND);
+
+  /* copy timestamp */
+  GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
+  /* get payload */
+  payload = gst_rtpbuffer_get_payload (outbuf);
+
+  data = GST_BUFFER_DATA (buffer);
+
+  /* copy data in payload */
+  memcpy (&payload[0], data, size);
+
+  gst_buffer_unref (buffer);
+
+  ret = gst_basertppayload_push (basepayload, outbuf);
+
+  return ret;
+}
+
+gboolean
+gst_rtpg711enc_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpg711enc",
+      GST_RANK_NONE, GST_TYPE_RTP_G711_ENC);
+}

gst/rtp/gstrtpg711pay.h

@@ -0,0 +1,54 @@
+/* GStreamer
+ * Copyright (C) <2005> 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 
+ */
+
+
+#ifndef __GST_RTP_G711_ENC_H__
+#define __GST_RTP_G711_ENC_H__
+
+#include <gst/gst.h>
+#include <gst/rtp/gstbasertppayload.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstRtpG711Enc GstRtpG711Enc;
+typedef struct _GstRtpG711EncClass GstRtpG711EncClass;
+
+#define GST_TYPE_RTP_G711_ENC \
+  (gst_rtpg711enc_get_type())
+#define GST_RTP_G711_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_G711_ENC,GstRtpG711Enc))
+#define GST_RTP_G711_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_G711_ENC,GstRtpG711Enc))
+#define GST_IS_RTP_G711_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_G711_ENC))
+#define GST_IS_RTP_G711_ENC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_G711_ENC))
+
+struct _GstRtpG711Enc
+{
+  GstBaseRTPPayload payload;
+
+  gint frequency;
+};
+
+struct _GstRtpG711EncClass
+{
+  GstBaseRTPPayloadClass parent_class;
+};
+
+gboolean gst_rtpg711enc_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_G711_ENC_H__ */