gst/rtp/: Added an H263 depayloader. Fixes #369392.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtph263depay.c: (gst_rtp_h263_depay_base_init),
(gst_rtp_h263_depay_class_init), (gst_rtp_h263_depay_init),
(gst_rtp_h263_depay_finalize), (gst_rtp_h263_depay_setcaps),
(gst_rtp_h263_depay_process), (gst_rtp_h263_depay_set_property),
(gst_rtp_h263_depay_get_property),
(gst_rtp_h263_depay_change_state),
(gst_rtp_h263_depay_plugin_init):
* gst/rtp/gstrtph263depay.h:
Added an H263 depayloader. Fixes #369392.
* gst/rtp/gstrtph263pdepay.c: (gst_rtp_h263p_depay_setcaps),
(gst_rtp_h263p_depay_process):
* gst/rtp/gstrtph263ppay.c: (gst_fragmentation_mode_get_type),
(gst_rtp_h263p_pay_class_init), (gst_rtp_h263p_pay_flush):
Make the H263+ pay/depayloader support H263-1998 and H263-2000
payloads.
Also alow plain H263 on the h263p payloaders. Fixes #465040.

1 files changed, 357 insertions, 0 deletions

diff --git a/gst/rtp/gstrtph263depay.c b/gst/rtp/gstrtph263depay.c
new file mode 100644
index 00000000..58ee0e20
--- /dev/null
+++ b/gst/rtp/gstrtph263depay.c
@@ -0,0 +1,357 @@
+/* GStreamer
+ *
+ * Copyright 2007 Nokia Corporation
+ * Copyright 2007 Collabora Ltd,
+ *  @author: Philippe Kalaf <philippe.kalaf@collabora.co.uk>
+ *
+ * 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 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 <string.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+#include "gstrtph263depay.h"
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_h263depay_details =
+GST_ELEMENT_DETAILS ("RTP H263 packet depayloader",
+    "Codec/Depayloader/Network",
+    "Extracts H263 video from RTP packets (RFC 2190)",
+    "Philippe Kalaf <philippe.kalaf@collabora.co.uk>");
+
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+};
+
+#define GST_RFC2190A_HEADER_LEN 4
+#define GST_RFC2190B_HEADER_LEN 8
+#define GST_RFC2190C_HEADER_LEN 12
+
+static GstStaticPadTemplate gst_rtp_h263_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-h263, "
+        "variant = (string) \"itu\", " "h263version = (string) \"h263\"")
+    );
+
+static GstStaticPadTemplate gst_rtp_h263_depay_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) " GST_RTP_PAYLOAD_H263_STRING ", "
+        "clock-rate = (int) 90000, " "encoding-name = (string) \"H263\"; "
+        "application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
+        "clock-rate = (int) 90000, " "encoding-name = (string) \"H263\"")
+    );
+
+GST_BOILERPLATE (GstRtpH263Depay, gst_rtp_h263_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static void gst_rtp_h263_depay_finalize (GObject * object);
+static void gst_rtp_h263_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtp_h263_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_rtp_h263_depay_change_state (GstElement *
+    element, GstStateChange transition);
+
+static GstBuffer *gst_rtp_h263_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+gboolean gst_rtp_h263_depay_setcaps (GstBaseRTPDepayload * filter,
+    GstCaps * caps);
+
+static void
+gst_rtp_h263_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_h263_depay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_h263_depay_sink_template));
+
+
+  gst_element_class_set_details (element_class, &gst_rtp_h263depay_details);
+}
+
+static void
+gst_rtp_h263_depay_class_init (GstRtpH263DepayClass * 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_h263_depay_process;
+  gstbasertpdepayload_class->set_caps = gst_rtp_h263_depay_setcaps;
+
+  gobject_class->finalize = gst_rtp_h263_depay_finalize;
+
+  gobject_class->set_property = gst_rtp_h263_depay_set_property;
+  gobject_class->get_property = gst_rtp_h263_depay_get_property;
+
+  gstelement_class->change_state = gst_rtp_h263_depay_change_state;
+}
+
+static void
+gst_rtp_h263_depay_init (GstRtpH263Depay * rtph263depay,
+    GstRtpH263DepayClass * klass)
+{
+  rtph263depay->adapter = gst_adapter_new ();
+}
+
+static void
+gst_rtp_h263_depay_finalize (GObject * object)
+{
+  GstRtpH263Depay *rtph263depay;
+
+  rtph263depay = GST_RTP_H263_DEPAY (object);
+
+  g_object_unref (rtph263depay->adapter);
+  rtph263depay->adapter = NULL;
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+gboolean
+gst_rtp_h263_depay_setcaps (GstBaseRTPDepayload * filter, GstCaps * caps)
+{
+  GstCaps *srccaps;
+  GstStructure *structure = gst_caps_get_structure (caps, 0);
+  gint clock_rate = 90000;      /* default */
+
+  gst_structure_get_int (structure, "clock-rate", &clock_rate);
+  filter->clock_rate = clock_rate;
+
+  srccaps = gst_caps_new_simple ("video/x-h263",
+      "variant", G_TYPE_STRING, "itu",
+      "h263version", G_TYPE_STRING, "h263", NULL);
+  gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (filter), srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+}
+
+static GstBuffer *
+gst_rtp_h263_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+
+  GstRtpH263Depay *rtph263depay;
+  GstBuffer *outbuf;
+
+  rtph263depay = GST_RTP_H263_DEPAY (depayload);
+
+  if (!gst_rtp_buffer_validate (buf))
+    goto bad_packet;
+
+  {
+    gint payload_len;
+    guint8 *payload;
+    guint32 timestamp;
+    guint header_len;
+
+    gboolean F, P, M;
+
+    payload_len = gst_rtp_buffer_get_payload_len (buf);
+    payload = gst_rtp_buffer_get_payload (buf);
+
+    M = gst_rtp_buffer_get_marker (buf);
+
+    /* Let's see what mode we are using */
+    F = (payload[0] & 0x01) == 0x01;
+    P = (payload[0] & 0x02) == 0x02;
+
+    if (F == 0) {
+      /* F == 0 and P == 0 or 1
+       * mode A */
+      header_len = GST_RFC2190A_HEADER_LEN;
+
+      /* 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
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |F|P|SBIT |EBIT | SRC |I|U|S|A|R      |DBQ| TRB |    TR         |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       */
+    } else if (P == 0) {
+      /* F == 1 and P == 0
+       * mode B */
+      header_len = GST_RFC2190B_HEADER_LEN;
+
+      /* 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
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |F|P|SBIT |EBIT | SRC | QUANT   |  GOBN   |   MBA           |R  |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |I|U|S|A| HMV1        | VMV1        | HMV2        | VMV2        |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       */
+    } else {
+      /* F == 1 and P == 1
+       * mode C */
+      header_len = GST_RFC2190C_HEADER_LEN;
+
+      /* 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
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |F|P|SBIT |EBIT | SRC | QUANT   |  GOBN   |   MBA           |R  |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * |I|U|S|A| HMV1        | VMV1        | HMV2        | VMV2        |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       * | RR                                  |DBQ| TRB |    TR         |
+       * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       */
+    }
+
+    payload += header_len;
+    payload_len -= header_len;
+
+    timestamp = gst_rtp_buffer_get_timestamp (buf);
+
+    /* FIXME at this point, we just drop the header and don't check for any missing
+     * buffers, proper behaviour is to recreate the appropriate information in the
+     * bitstream if it has been lost */
+    if (M) {
+      /* frame is completed: append to previous, push it out */
+      guint len, padlen;
+      guint avail;
+
+      avail = gst_adapter_available (rtph263depay->adapter);
+
+      len = avail + payload_len;
+      padlen = (len % 4) + 4;
+      outbuf = gst_buffer_new_and_alloc (len + padlen);
+      memset (GST_BUFFER_DATA (outbuf) + len, 0, padlen);
+      GST_BUFFER_SIZE (outbuf) = len;
+
+      /* prepend previous data */
+      if (avail > 0) {
+        gst_adapter_copy (rtph263depay->adapter, GST_BUFFER_DATA (outbuf), 0,
+            avail);
+        gst_adapter_flush (rtph263depay->adapter, avail);
+      }
+      memcpy (GST_BUFFER_DATA (outbuf) + avail, payload, payload_len);
+
+      return outbuf;
+
+    } else {
+      /* frame not completed: store in adapter */
+      outbuf = gst_buffer_new_and_alloc (payload_len);
+
+      memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+
+      gst_adapter_push (rtph263depay->adapter, outbuf);
+    }
+  }
+  return NULL;
+
+bad_packet:
+  {
+    GST_ELEMENT_WARNING (rtph263depay, STREAM, DECODE,
+        ("Packet did not validate"), (NULL));
+    return NULL;
+  }
+}
+
+static void
+gst_rtp_h263_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpH263Depay *rtph263depay;
+
+  rtph263depay = GST_RTP_H263_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtp_h263_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstRtpH263Depay *rtph263depay;
+
+  rtph263depay = GST_RTP_H263_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtp_h263_depay_change_state (GstElement * element,
+    GstStateChange transition)
+{
+  GstRtpH263Depay *rtph263depay;
+  GstStateChangeReturn ret;
+
+  rtph263depay = GST_RTP_H263_DEPAY (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      gst_adapter_clear (rtph263depay->adapter);
+      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_h263_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtph263depay",
+      GST_RANK_MARGINAL, GST_TYPE_RTP_H263_DEPAY);
+}