gst/rtp/: Added RFC 2250 MPEG Video Depayloader.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpmpvdepay.c: (gst_rtp_mpv_depay_base_init),
(gst_rtp_mpv_depay_class_init), (gst_rtp_mpv_depay_init),
(gst_rtp_mpv_depay_setcaps), (gst_rtp_mpv_depay_process),
(gst_rtp_mpv_depay_set_property), (gst_rtp_mpv_depay_get_property),
(gst_rtp_mpv_depay_change_state), (gst_rtp_mpv_depay_plugin_init):
* gst/rtp/gstrtpmpvdepay.h:
Added RFC 2250 MPEG Video Depayloader.
* gst/rtp/gstrtpL16depay.h:
* gst/rtp/gstrtph263pdepay.c: (gst_rtp_h263p_depay_setcaps),
(gst_rtp_h263p_depay_process):
Fix Header file. Small cleanups.
* gst/rtp/gstrtpmp4gdepay.c: (gst_rtp_mp4g_depay_class_init),
(gst_rtp_mp4g_depay_init), (gst_rtp_mp4g_depay_finalize),
(gst_rtp_mp4g_depay_process), (gst_rtp_mp4g_depay_change_state):
* gst/rtp/gstrtpmp4vdepay.c: (gst_rtp_mp4v_depay_class_init),
(gst_rtp_mp4v_depay_init), (gst_rtp_mp4v_depay_finalize),
(gst_rtp_mp4v_depay_setcaps), (gst_rtp_mp4v_depay_process),
(gst_rtp_mp4v_depay_change_state):
Remove usused code. Remove Adapter from state Change. Added debug.
* gst/rtp/gstrtpmpadepay.c: (gst_rtp_mpa_depay_base_init),
(gst_rtp_mpa_depay_class_init), (gst_rtp_mpa_depay_init),
(gst_rtp_mpa_depay_setcaps), (gst_rtp_mpa_depay_process):
* gst/rtp/gstrtpmpadepay.h:
Subclass base depayloader.
Added debug.
Support static payload type assignment as well.
* gst/rtp/gstrtpmpapay.c:
Fix caps.

1 files changed, 298 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpmpvdepay.c b/gst/rtp/gstrtpmpvdepay.c
new file mode 100644
index 00000000..99cfeb34
--- /dev/null
+++ b/gst/rtp/gstrtpmpvdepay.c
@@ -0,0 +1,298 @@
+/* GStreamer
+ * Copyright (C) <2006> 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 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 "gstrtpmpvdepay.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpmpvdepay_debug);
+#define GST_CAT_DEFAULT (rtpmpvdepay_debug)
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_mpvdepay_details =
+GST_ELEMENT_DETAILS ("RTP packet depayloader",
+    "Codec/Depayloader/Network",
+    "Extracts MPEG video from RTP packets (RFC 2250)",
+    "Wim Taymans <wim@fluendo.com>");
+
+/* RtpMPVDepay signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+};
+
+static GstStaticPadTemplate gst_rtp_mpv_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/mpeg")
+    );
+
+static GstStaticPadTemplate gst_rtp_mpv_depay_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"video\", "
+        "clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\";"
+        "application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) " GST_RTP_PAYLOAD_MPV_STRING ", "
+        "clock-rate = (int) 90000")
+    );
+
+GST_BOILERPLATE (GstRtpMPVDepay, gst_rtp_mpv_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static gboolean gst_rtp_mpv_depay_setcaps (GstBaseRTPDepayload * depayload,
+    GstCaps * caps);
+static GstBuffer *gst_rtp_mpv_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+
+static void gst_rtp_mpv_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtp_mpv_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtp_mpv_depay_change_state (GstElement *
+    element, GstStateChange transition);
+
+static void
+gst_rtp_mpv_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_mpv_depay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_mpv_depay_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_mpvdepay_details);
+}
+
+static void
+gst_rtp_mpv_depay_class_init (GstRtpMPVDepayClass * 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);
+
+  gobject_class->set_property = gst_rtp_mpv_depay_set_property;
+  gobject_class->get_property = gst_rtp_mpv_depay_get_property;
+
+  gstelement_class->change_state = gst_rtp_mpv_depay_change_state;
+
+  gstbasertpdepayload_class->set_caps = gst_rtp_mpv_depay_setcaps;
+  gstbasertpdepayload_class->process = gst_rtp_mpv_depay_process;
+
+  GST_DEBUG_CATEGORY_INIT (rtpmpvdepay_debug, "rtpmpvdepay", 0,
+      "MPEG Video RTP Depayloader");
+}
+
+static void
+gst_rtp_mpv_depay_init (GstRtpMPVDepay * rtpmpvdepay,
+    GstRtpMPVDepayClass * klass)
+{
+}
+
+static gboolean
+gst_rtp_mpv_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+  GstStructure *structure;
+  GstRtpMPVDepay *rtpmpvdepay;
+  gint clock_rate = 90000;      /* default */
+
+  rtpmpvdepay = GST_RTP_MPV_DEPAY (depayload);
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  gst_structure_get_int (structure, "clock-rate", &clock_rate);
+  depayload->clock_rate = clock_rate;
+
+  return TRUE;
+}
+
+static GstBuffer *
+gst_rtp_mpv_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+  GstRtpMPVDepay *rtpmpvdepay;
+  GstBuffer *outbuf;
+
+  rtpmpvdepay = GST_RTP_MPV_DEPAY (depayload);
+
+  if (!gst_rtp_buffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint8 T;
+    guint32 timestamp;
+
+    payload_len = gst_rtp_buffer_get_payload_len (buf);
+    payload = gst_rtp_buffer_get_payload (buf);
+
+    if (payload_len <= 4)
+      goto empty_packet;
+
+    /* 3.4 MPEG Video-specific header
+     *
+     *  0                   1                   2                   3
+     *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     * |    MBZ  |T|         TR        | |N|S|B|E|  P  | | BFC | | FFC |
+     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+     *                                  AN              FBV     FFV
+     */
+    T = (payload[0] & 0x04);
+
+    payload_len -= 4;
+    payload += 4;
+
+    if (T) {
+      /* 
+       * 3.4.1 MPEG-2 Video-specific header extension
+       *
+       *  0                   1                   2                   3
+       *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |X|E|f_[0,0]|f_[0,1]|f_[1,0]|f_[1,1]| DC| PS|T|P|C|Q|V|A|R|H|G|D|
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       */
+      if (payload_len <= 4)
+        goto empty_packet;
+
+      payload_len -= 4;
+      payload += 4;
+    }
+
+    timestamp = gst_rtp_buffer_get_timestamp (buf);
+
+    outbuf = gst_buffer_new_and_alloc (payload_len);
+    memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+    GST_DEBUG_OBJECT (rtpmpvdepay,
+        "gst_rtp_mpv_depay_chain: pushing buffer of size %d",
+        GST_BUFFER_SIZE (outbuf));
+
+    return outbuf;
+  }
+
+  return NULL;
+
+bad_packet:
+  {
+    GST_ELEMENT_WARNING (rtpmpvdepay, STREAM, DECODE,
+        ("Packet did not validate."), (NULL));
+    return NULL;
+  }
+#if 0
+bad_payload:
+  {
+    GST_DEBUG_OBJECT (rtpmpvdepay, "Unexpected payload type %u", pt);
+    return NULL;
+  }
+#endif
+empty_packet:
+  {
+    GST_ELEMENT_WARNING (rtpmpvdepay, STREAM, DECODE,
+        ("Empty payload."), (NULL));
+    return NULL;
+  }
+}
+
+static void
+gst_rtp_mpv_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpMPVDepay *rtpmpvdepay;
+
+  rtpmpvdepay = GST_RTP_MPV_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtp_mpv_depay_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpMPVDepay *rtpmpvdepay;
+
+  rtpmpvdepay = GST_RTP_MPV_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtp_mpv_depay_change_state (GstElement * element, GstStateChange transition)
+{
+  GstRtpMPVDepay *rtpmpvdepay;
+  GstStateChangeReturn ret;
+
+  rtpmpvdepay = GST_RTP_MPV_DEPAY (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      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_mpv_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpmpvdepay",
+      GST_RANK_MARGINAL, GST_TYPE_RTP_MPV_DEPAY);
+}