gst/rtp/: Added very simplistic amr payloader. depayloader does not work yet.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpamrdec.c: (gst_rtpamrdec_get_type),
(gst_rtpamrdec_base_init), (gst_rtpamrdec_class_init),
(gst_rtpamrdec_init), (gst_rtpamrdec_chain),
(gst_rtpamrdec_set_property), (gst_rtpamrdec_get_property),
(gst_rtpamrdec_change_state), (gst_rtpamrdec_plugin_init):
* gst/rtp/gstrtpamrdec.h:
* gst/rtp/gstrtpamrenc.c: (gst_rtpamrenc_get_type),
(gst_rtpamrenc_base_init), (gst_rtpamrenc_class_init),
(gst_rtpamrenc_init), (gst_rtpamrenc_chain),
(gst_rtpamrenc_set_property), (gst_rtpamrenc_get_property),
(gst_rtpamrenc_change_state), (gst_rtpamrenc_plugin_init):
* gst/rtp/gstrtpamrenc.h:
* gst/rtp/gstrtpmpaenc.c: (gst_rtpmpaenc_class_init),
(gst_rtpmpaenc_flush), (gst_rtpmpaenc_chain):
Added very simplistic amr payloader. depayloader does not
work yet.

1 files changed, 261 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpamrdec.c b/gst/rtp/gstrtpamrdec.c
new file mode 100644
index 00000000..61827cb6
--- /dev/null
+++ b/gst/rtp/gstrtpamrdec.c
@@ -0,0 +1,261 @@
+/* GStreamer
+ * Copyright (C) <2005> Wim Taymans <wim@fluendo.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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include <string.h>
+#include "gstrtpamrdec.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_amrdec_details = {
+  "RTP packet parser",
+  "Codec/Parser/Network",
+  "Extracts MPEG audio from RTP packets",
+  "Wim Taymans <wim@fluendo.com>"
+};
+
+/* RtpAMRDec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_FREQUENCY
+};
+
+static GstStaticPadTemplate gst_rtpamrdec_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/mpeg")
+    );
+
+static GstStaticPadTemplate gst_rtpamrdec_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp")
+    );
+
+
+static void gst_rtpamrdec_class_init (GstRtpAMRDecClass * klass);
+static void gst_rtpamrdec_base_init (GstRtpAMRDecClass * klass);
+static void gst_rtpamrdec_init (GstRtpAMRDec * rtpamrdec);
+
+static GstFlowReturn gst_rtpamrdec_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtpamrdec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtpamrdec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstElementStateReturn gst_rtpamrdec_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtpamrdec_get_type (void)
+{
+  static GType rtpamrdec_type = 0;
+
+  if (!rtpamrdec_type) {
+    static const GTypeInfo rtpamrdec_info = {
+      sizeof (GstRtpAMRDecClass),
+      (GBaseInitFunc) gst_rtpamrdec_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpamrdec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpAMRDec),
+      0,
+      (GInstanceInitFunc) gst_rtpamrdec_init,
+    };
+
+    rtpamrdec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstRtpAMRDec",
+        &rtpamrdec_info, 0);
+  }
+  return rtpamrdec_type;
+}
+
+static void
+gst_rtpamrdec_base_init (GstRtpAMRDecClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpamrdec_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpamrdec_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_amrdec_details);
+}
+
+static void
+gst_rtpamrdec_class_init (GstRtpAMRDecClass * 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_rtpamrdec_set_property;
+  gobject_class->get_property = gst_rtpamrdec_get_property;
+
+  gstelement_class->change_state = gst_rtpamrdec_change_state;
+}
+
+static void
+gst_rtpamrdec_init (GstRtpAMRDec * rtpamrdec)
+{
+  rtpamrdec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpamrdec_src_template), "src");
+  gst_element_add_pad (GST_ELEMENT (rtpamrdec), rtpamrdec->srcpad);
+
+  rtpamrdec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpamrdec_sink_template), "sink");
+  gst_pad_set_chain_function (rtpamrdec->sinkpad, gst_rtpamrdec_chain);
+  gst_element_add_pad (GST_ELEMENT (rtpamrdec), rtpamrdec->sinkpad);
+}
+
+static GstFlowReturn
+gst_rtpamrdec_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstRtpAMRDec *rtpamrdec;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+
+  rtpamrdec = GST_RTP_AMR_DEC (GST_OBJECT_PARENT (pad));
+
+  if (!gst_rtpbuffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint16 frag_offset;
+    guint32 timestamp;
+
+    payload_len = gst_rtpbuffer_get_payload_len (buf);
+    payload = gst_rtpbuffer_get_payload (buf);
+
+    frag_offset = (payload[2] << 8) | payload[3];
+
+    /* strip off header */
+    payload_len -= 4;
+    payload += 4;
+
+    timestamp = gst_rtpbuffer_get_timestamp (buf);
+
+    outbuf = gst_buffer_new_and_alloc (payload_len);
+
+    //GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / 90000;
+
+    memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+    GST_DEBUG ("gst_rtpamrdec_chain: pushing buffer of size %d",
+        GST_BUFFER_SIZE (outbuf));
+
+    gst_buffer_unref (buf);
+
+    ret = gst_pad_push (rtpamrdec->srcpad, outbuf);
+  }
+
+  return ret;
+
+bad_packet:
+  {
+    GST_DEBUG ("Packet did not validate");
+    gst_buffer_unref (buf);
+    return GST_FLOW_ERROR;
+  }
+}
+
+static void
+gst_rtpamrdec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpAMRDec *rtpamrdec;
+
+  rtpamrdec = GST_RTP_AMR_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtpamrdec_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpAMRDec *rtpamrdec;
+
+  rtpamrdec = GST_RTP_AMR_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstElementStateReturn
+gst_rtpamrdec_change_state (GstElement * element)
+{
+  GstRtpAMRDec *rtpamrdec;
+  gint transition;
+  GstElementStateReturn ret;
+
+  rtpamrdec = GST_RTP_AMR_DEC (element);
+  transition = GST_STATE_TRANSITION (element);
+
+  switch (transition) {
+    case GST_STATE_NULL_TO_READY:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  switch (transition) {
+    case GST_STATE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+  return ret;
+}
+
+gboolean
+gst_rtpamrdec_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpamrdec",
+      GST_RANK_NONE, GST_TYPE_RTP_AMR_DEC);
+}