gst/rtp/: Added mpeg4 video payload encoder/decoder.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpmp4vdec.c: (gst_rtpmp4vdec_get_type),
(gst_rtpmp4vdec_base_init), (gst_rtpmp4vdec_class_init),
(gst_rtpmp4vdec_init), (gst_rtpmp4vdec_setcaps),
(gst_rtpmp4vdec_chain), (gst_rtpmp4vdec_set_property),
(gst_rtpmp4vdec_get_property), (gst_rtpmp4vdec_change_state),
(gst_rtpmp4vdec_plugin_init):
* gst/rtp/gstrtpmp4vdec.h:
* gst/rtp/gstrtpmp4venc.c: (gst_rtpmp4venc_get_type),
(gst_rtpmp4venc_base_init), (gst_rtpmp4venc_class_init),
(gst_rtpmp4venc_init), (gst_rtpmp4venc_setcaps),
(gst_rtpmp4venc_flush), (gst_rtpmp4venc_chain),
(gst_rtpmp4venc_set_property), (gst_rtpmp4venc_get_property),
(gst_rtpmp4venc_change_state), (gst_rtpmp4venc_plugin_init):
* gst/rtp/gstrtpmp4venc.h:
* gst/rtp/gstrtpmpadec.c: (gst_rtpmpadec_chain):
* gst/rtp/gstrtpmpaenc.c: (gst_rtpmpaenc_flush):
Added mpeg4 video payload encoder/decoder.
Added some docs in mpa payloader.

1 files changed, 309 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpmp4vdepay.c b/gst/rtp/gstrtpmp4vdepay.c
new file mode 100644
index 00000000..39ab5df9
--- /dev/null
+++ b/gst/rtp/gstrtpmp4vdepay.c
@@ -0,0 +1,309 @@
+/* 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 "gstrtpmp4vdec.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_mp4vdec_details = {
+  "RTP packet parser",
+  "Codec/Parser/Network",
+  "Extracts MPEG4 video from RTP packets (RFC 3016)",
+  "Wim Taymans <wim@fluendo.com>"
+};
+
+/* RtpMP4VDec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+  ARG_FREQUENCY
+};
+
+static GstStaticPadTemplate gst_rtpmp4vdec_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/mpeg,"
+        "mpegversion=(int) 4," "systemstream=(boolean)false")
+    );
+
+static GstStaticPadTemplate gst_rtpmp4vdec_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp"
+        /* All optional parameters
+         *
+         * "rate=(int) [1, MAX],"
+         * "profile-level-id=[1,MAX]"
+         * "config=" 
+         */
+    )
+    );
+
+
+static void gst_rtpmp4vdec_class_init (GstRtpMP4VDecClass * klass);
+static void gst_rtpmp4vdec_base_init (GstRtpMP4VDecClass * klass);
+static void gst_rtpmp4vdec_init (GstRtpMP4VDec * rtpmp4vdec);
+
+static gboolean gst_rtpmp4vdec_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_rtpmp4vdec_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtpmp4vdec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtpmp4vdec_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtpmp4vdec_change_state (GstElement * element,
+    GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtpmp4vdec_get_type (void)
+{
+  static GType rtpmp4vdec_type = 0;
+
+  if (!rtpmp4vdec_type) {
+    static const GTypeInfo rtpmp4vdec_info = {
+      sizeof (GstRtpMP4VDecClass),
+      (GBaseInitFunc) gst_rtpmp4vdec_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtpmp4vdec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpMP4VDec),
+      0,
+      (GInstanceInitFunc) gst_rtpmp4vdec_init,
+    };
+
+    rtpmp4vdec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstRtpMP4VDec",
+        &rtpmp4vdec_info, 0);
+  }
+  return rtpmp4vdec_type;
+}
+
+static void
+gst_rtpmp4vdec_base_init (GstRtpMP4VDecClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpmp4vdec_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtpmp4vdec_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_mp4vdec_details);
+}
+
+static void
+gst_rtpmp4vdec_class_init (GstRtpMP4VDecClass * 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_rtpmp4vdec_set_property;
+  gobject_class->get_property = gst_rtpmp4vdec_get_property;
+
+  gstelement_class->change_state = gst_rtpmp4vdec_change_state;
+}
+
+static void
+gst_rtpmp4vdec_init (GstRtpMP4VDec * rtpmp4vdec)
+{
+  rtpmp4vdec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpmp4vdec_src_template), "src");
+  gst_element_add_pad (GST_ELEMENT (rtpmp4vdec), rtpmp4vdec->srcpad);
+
+  rtpmp4vdec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get
+      (&gst_rtpmp4vdec_sink_template), "sink");
+  gst_pad_set_setcaps_function (rtpmp4vdec->sinkpad, gst_rtpmp4vdec_setcaps);
+  gst_pad_set_chain_function (rtpmp4vdec->sinkpad, gst_rtpmp4vdec_chain);
+  gst_element_add_pad (GST_ELEMENT (rtpmp4vdec), rtpmp4vdec->sinkpad);
+}
+
+static gboolean
+gst_rtpmp4vdec_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstStructure *structure;
+  GstRtpMP4VDec *rtpmp4vdec;
+  GstCaps *srccaps;
+
+  rtpmp4vdec = GST_RTP_MP4V_DEC (GST_OBJECT_PARENT (pad));
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  if (!gst_structure_get_int (structure, "rate", &rtpmp4vdec->rate))
+    rtpmp4vdec->rate = 90000;
+
+  srccaps = gst_caps_new_simple ("video/mpeg",
+      "mpegversion", G_TYPE_INT, 4,
+      "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
+  gst_pad_set_caps (rtpmp4vdec->srcpad, srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtpmp4vdec_chain (GstPad * pad, GstBuffer * buf)
+{
+  GstRtpMP4VDec *rtpmp4vdec;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+
+  rtpmp4vdec = GST_RTP_MP4V_DEC (gst_pad_get_parent (pad));
+
+  if (!gst_rtpbuffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint32 timestamp;
+
+    payload_len = gst_rtpbuffer_get_payload_len (buf);
+    payload = gst_rtpbuffer_get_payload (buf);
+
+    timestamp = gst_rtpbuffer_get_timestamp (buf);
+
+    outbuf = gst_buffer_new_and_alloc (payload_len);
+    memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+    gst_adapter_push (rtpmp4vdec->adapter, outbuf);
+
+    /* if this was the last packet of the VOP, create and push a buffer */
+    if (gst_rtpbuffer_get_marker (buf)) {
+      guint avail;
+
+      avail = gst_adapter_available (rtpmp4vdec->adapter);
+
+      outbuf = gst_buffer_new_and_alloc (avail);
+      GST_BUFFER_MALLOCDATA (outbuf) =
+          gst_adapter_take (rtpmp4vdec->adapter, avail);
+      GST_BUFFER_DATA (outbuf) = GST_BUFFER_MALLOCDATA (outbuf);
+      gst_buffer_set_caps (outbuf, GST_PAD_CAPS (rtpmp4vdec->srcpad));
+      GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / rtpmp4vdec->rate;
+
+      GST_DEBUG ("gst_rtpmp4vdec_chain: pushing buffer of size %d",
+          GST_BUFFER_SIZE (outbuf));
+
+      ret = gst_pad_push (rtpmp4vdec->srcpad, outbuf);
+    } else {
+      ret = GST_FLOW_OK;
+    }
+    gst_buffer_unref (buf);
+  }
+  gst_object_unref (rtpmp4vdec);
+
+  return ret;
+bad_packet:
+  {
+    GST_DEBUG ("Packet did not validate");
+    gst_buffer_unref (buf);
+    gst_object_unref (rtpmp4vdec);
+
+    return GST_FLOW_ERROR;
+  }
+}
+
+static void
+gst_rtpmp4vdec_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpMP4VDec *rtpmp4vdec;
+
+  rtpmp4vdec = GST_RTP_MP4V_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtpmp4vdec_get_property (GObject * object, guint prop_id, GValue * value,
+    GParamSpec * pspec)
+{
+  GstRtpMP4VDec *rtpmp4vdec;
+
+  rtpmp4vdec = GST_RTP_MP4V_DEC (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtpmp4vdec_change_state (GstElement * element, GstStateChange transition)
+{
+  GstRtpMP4VDec *rtpmp4vdec;
+  GstStateChangeReturn ret;
+
+  rtpmp4vdec = GST_RTP_MP4V_DEC (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      rtpmp4vdec->adapter = gst_adapter_new ();
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      gst_adapter_clear (rtpmp4vdec->adapter);
+      rtpmp4vdec->rate = 90000;
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      g_object_unref (rtpmp4vdec->adapter);
+      rtpmp4vdec->adapter = NULL;
+      break;
+    default:
+      break;
+  }
+  return ret;
+}
+
+gboolean
+gst_rtpmp4vdec_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpmp4vdec",
+      GST_RANK_NONE, GST_TYPE_RTP_MP4V_DEC);
+}