gst/rtp/: Add MP1S depayloader.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpmp1sdepay.c: (gst_rtp_mp1s_depay_base_init),
(gst_rtp_mp1s_depay_class_init), (gst_rtp_mp1s_depay_init),
(gst_rtp_mp1s_depay_setcaps), (gst_rtp_mp1s_depay_process),
(gst_rtp_mp1s_depay_set_property),
(gst_rtp_mp1s_depay_get_property),
(gst_rtp_mp1s_depay_change_state),
(gst_rtp_mp1s_depay_plugin_init):
* gst/rtp/gstrtpmp1sdepay.h:
Add MP1S depayloader.
* gst/rtsp/URLS:
Some more sample rtsp streams.

1 files changed, 248 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpmp1sdepay.c b/gst/rtp/gstrtpmp1sdepay.c
new file mode 100644
index 00000000..5c520d65
--- /dev/null
+++ b/gst/rtp/gstrtpmp1sdepay.c
@@ -0,0 +1,248 @@
+/* GStreamer
+ * Copyright (C) <2008> Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include <string.h>
+#include "gstrtpmp1sdepay.h"
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_mp1sdepay_details =
+GST_ELEMENT_DETAILS ("RTP packet depayloader",
+    "Codec/Depayloader/Network",
+    "Extracts MPEG1 System Streams from RTP packets (RFC 3555)",
+    "Wim Taymans <wim.taymans@gmail.com>");
+
+/* RtpMP1SDepay signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  PROP_0,
+  PROP_LAST
+};
+
+static GstStaticPadTemplate gst_rtp_mp1s_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/mpeg,systemstream=(boolean)true")
+    );
+
+/* The spec says video/MP1S but I have seen streams with other/MP1S so we will
+ * allow them both */
+static GstStaticPadTemplate gst_rtp_mp1s_depay_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"other\", "
+        "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
+        "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\";"
+        "application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
+        "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\"")
+    );
+
+GST_BOILERPLATE (GstRtpMP1SDepay, gst_rtp_mp1s_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static gboolean gst_rtp_mp1s_depay_setcaps (GstBaseRTPDepayload * depayload,
+    GstCaps * caps);
+static GstBuffer *gst_rtp_mp1s_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+
+static void gst_rtp_mp1s_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtp_mp1s_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtp_mp1s_depay_change_state (GstElement *
+    element, GstStateChange transition);
+
+
+static void
+gst_rtp_mp1s_depay_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_mp1s_depay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_mp1s_depay_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_mp1sdepay_details);
+}
+
+static void
+gst_rtp_mp1s_depay_class_init (GstRtpMP1SDepayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+
+  gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstbasertpdepayload_class->process = gst_rtp_mp1s_depay_process;
+  gstbasertpdepayload_class->set_caps = gst_rtp_mp1s_depay_setcaps;
+
+  gobject_class->set_property = gst_rtp_mp1s_depay_set_property;
+  gobject_class->get_property = gst_rtp_mp1s_depay_get_property;
+
+  gstelement_class->change_state = gst_rtp_mp1s_depay_change_state;
+}
+
+static void
+gst_rtp_mp1s_depay_init (GstRtpMP1SDepay * rtpmp1sdepay,
+    GstRtpMP1SDepayClass * klass)
+{
+}
+
+static gboolean
+gst_rtp_mp1s_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+  GstCaps *srccaps;
+  GstStructure *structure;
+  GstRtpMP1SDepay *rtpmp1sdepay;
+  gint clock_rate = 90000;      /* default */
+
+  rtpmp1sdepay = GST_RTP_MP1S_DEPAY (depayload);
+
+  structure = gst_caps_get_structure (caps, 0);
+  gst_structure_get_int (structure, "clock-rate", &clock_rate);
+  depayload->clock_rate = clock_rate;
+
+  srccaps = gst_caps_new_simple ("video/mpeg",
+      "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
+  gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+}
+
+static GstBuffer *
+gst_rtp_mp1s_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+  GstRtpMP1SDepay *rtpmp1sdepay;
+  GstBuffer *outbuf;
+  gint payload_len;
+
+  rtpmp1sdepay = GST_RTP_MP1S_DEPAY (depayload);
+
+  if (G_UNLIKELY (!gst_rtp_buffer_validate (buf)))
+    goto bad_packet;
+
+  payload_len = gst_rtp_buffer_get_payload_len (buf);
+
+  outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, 0, -1);
+  gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
+
+  GST_DEBUG ("gst_rtp_mp1s_depay_chain: pushing buffer of size %d",
+      GST_BUFFER_SIZE (outbuf));
+
+  return outbuf;
+
+  /* ERRORS */
+bad_packet:
+  {
+    GST_ELEMENT_WARNING (rtpmp1sdepay, STREAM, DECODE,
+        (NULL), ("Packet did not validate"));
+    return NULL;
+  }
+}
+
+static void
+gst_rtp_mp1s_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpMP1SDepay *rtpmp1sdepay;
+
+  rtpmp1sdepay = GST_RTP_MP1S_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtp_mp1s_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstRtpMP1SDepay *rtpmp1sdepay;
+
+  rtpmp1sdepay = GST_RTP_MP1S_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtp_mp1s_depay_change_state (GstElement * element,
+    GstStateChange transition)
+{
+  GstRtpMP1SDepay *rtpmp1sdepay;
+  GstStateChangeReturn ret;
+
+  rtpmp1sdepay = GST_RTP_MP1S_DEPAY (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_rtp_mp1s_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpmp1sdepay",
+      GST_RANK_MARGINAL, GST_TYPE_RTP_MP1S_DEPAY);
+}