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, 285 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpamrpay.c b/gst/rtp/gstrtpamrpay.c
new file mode 100644
index 00000000..de368ec4
--- /dev/null
+++ b/gst/rtp/gstrtpamrpay.c
@@ -0,0 +1,285 @@
+/* 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 <string.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpamrenc.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_amrenc_details = {
+  "RTP packet parser",
+  "Codec/Parser/Network",
+  "Encode AMR audio into RTP packets",
+  "Wim Taymans <wim@fluendo.com>"
+};
+
+/* RtpAMREnc signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+#define DEFAULT_MTU	1024
+
+enum
+{
+  PROP_0,
+  PROP_MTU
+};
+
+static GstStaticPadTemplate gst_rtpamrenc_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-amr-nb, channels=(int)1, rate=(int)8000")
+    );
+
+static GstStaticPadTemplate gst_rtpamrenc_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp")
+    );
+
+
+static void gst_rtpamrenc_class_init (GstRtpAMREncClass * klass);
+static void gst_rtpamrenc_base_init (GstRtpAMREncClass * klass);
+static void gst_rtpamrenc_init (GstRtpAMREnc * rtpamrenc);
+
+static GstFlowReturn gst_rtpamrenc_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtpamrenc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtpamrenc_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstElementStateReturn gst_rtpamrenc_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtpamrenc_get_type (void)
+{
+  static GType rtpamrenc_type = 0;
+
+  if (!rtpamrenc_type) {
+    static const GTypeInfo rtpamrenc_info = {
+      sizeof (GstRtpAMREncClass),
+      (GBaseInitFunc) gst_rtpamrenc_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpamrenc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpAMREnc),
+      0,
+      (GInstanceInitFunc) gst_rtpamrenc_init,
+    };
+
+    rtpamrenc_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstRtpAMREnc",
+        &rtpamrenc_info, 0);
+  }
+  return rtpamrenc_type;
+}
+
+static void
+gst_rtpamrenc_base_init (GstRtpAMREncClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpamrenc_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpamrenc_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_amrenc_details);
+}
+
+static void
+gst_rtpamrenc_class_init (GstRtpAMREncClass * 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_rtpamrenc_set_property;
+  gobject_class->get_property = gst_rtpamrenc_get_property;
+
+  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
+      g_param_spec_uint ("mtu", "MTU",
+          "Maximum size of one packet",
+          28, G_MAXUINT, DEFAULT_MTU, G_PARAM_READWRITE));
+
+  gstelement_class->change_state = gst_rtpamrenc_change_state;
+}
+
+static void
+gst_rtpamrenc_init (GstRtpAMREnc * rtpamrenc)
+{
+  rtpamrenc->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpamrenc_src_template), "src");
+  gst_element_add_pad (GST_ELEMENT (rtpamrenc), rtpamrenc->srcpad);
+
+  rtpamrenc->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpamrenc_sink_template), "sink");
+  gst_pad_set_chain_function (rtpamrenc->sinkpad, gst_rtpamrenc_chain);
+  gst_element_add_pad (GST_ELEMENT (rtpamrenc), rtpamrenc->sinkpad);
+
+  rtpamrenc->mtu = DEFAULT_MTU;
+}
+
+static GstFlowReturn
+gst_rtpamrenc_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstRtpAMREnc *rtpamrenc;
+  GstFlowReturn ret;
+  guint size, payload_len;
+  GstBuffer *outbuf;
+  guint8 *payload;
+  GstClockTime timestamp;
+
+  rtpamrenc = GST_RTP_AMR_ENC (gst_pad_get_parent (pad));
+
+  size = GST_BUFFER_SIZE (buffer);
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+
+  /* FIXME, only one AMR frame per RTP packet for now, 
+   * octet aligned, no interleaving, single channel, no CRC,
+   * no robust-sorting. */
+  payload_len = size + 2;
+
+  outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
+  /* FIXME, assert for now */
+  g_assert (GST_BUFFER_SIZE (outbuf) < rtpamrenc->mtu);
+
+  gst_rtpbuffer_set_seq (outbuf, rtpamrenc->seqnum++);
+  gst_rtpbuffer_set_timestamp (outbuf, timestamp * 8000 / GST_SECOND);
+
+  /* copy timestamp */
+  GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
+
+  /* get payload */
+  payload = gst_rtpbuffer_get_payload (outbuf);
+
+  /*   0 1 2 3 4 5 6 7 
+   *  +-+-+-+-+-+-+-+-+
+   *  |  CMR  |R|R|R|R|
+   *  +-+-+-+-+-+-+-+-+
+   */
+  payload[0] = 0xF0;            /* CMR, no specific mode requested */
+  /*   0 1 2 3 4 5 6 7
+   *  +-+-+-+-+-+-+-+-+
+   *  |F|  FT   |Q|P|P|
+   *  +-+-+-+-+-+-+-+-+
+   */
+  payload[1] = 0x04;            /* ToC, no damage (Q=1) */
+
+  /* copy data in payload */
+  memcpy (&payload[2], GST_BUFFER_DATA (buffer), size);
+
+  gst_buffer_unref (buffer);
+
+  ret = gst_pad_push (rtpamrenc->srcpad, outbuf);
+
+  gst_object_unref (rtpamrenc);
+
+  return ret;
+}
+
+static void
+gst_rtpamrenc_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpAMREnc *rtpamrenc;
+
+  rtpamrenc = GST_RTP_AMR_ENC (object);
+
+  switch (prop_id) {
+    case PROP_MTU:
+      rtpamrenc->mtu = g_value_get_uint (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtpamrenc_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpAMREnc *rtpamrenc;
+
+  rtpamrenc = GST_RTP_AMR_ENC (object);
+
+  switch (prop_id) {
+    case PROP_MTU:
+      g_value_set_uint (value, rtpamrenc->mtu);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstElementStateReturn
+gst_rtpamrenc_change_state (GstElement * element)
+{
+  GstRtpAMREnc *rtpamrenc;
+  gint transition;
+  GstElementStateReturn ret;
+
+  rtpamrenc = GST_RTP_AMR_ENC (element);
+  transition = GST_STATE_TRANSITION (element);
+
+  switch (transition) {
+    case GST_STATE_NULL_TO_READY:
+      break;
+    case GST_STATE_READY_TO_PAUSED:
+      rtpamrenc->seqnum = 0;
+      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_rtpamrenc_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpamrenc",
+      GST_RANK_NONE, GST_TYPE_RTP_AMR_ENC);
+}