gst/rtp/: Add theora pay/depayloaders.

Original commit message from CVS:
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtptheoradepay.c: (gst_rtp_theora_depay_base_init),
(gst_rtp_theora_depay_class_init), (gst_rtp_theora_depay_init),
(gst_rtp_theora_depay_finalize),
(gst_rtp_theora_depay_parse_configuration),
(gst_rtp_theora_depay_setcaps),
(gst_rtp_theora_depay_switch_codebook),
(gst_rtp_theora_depay_process),
(gst_rtp_theora_depay_set_property),
(gst_rtp_theora_depay_get_property),
(gst_rtp_theora_depay_change_state),
(gst_rtp_theora_depay_plugin_init):
* gst/rtp/gstrtptheoradepay.h:
* gst/rtp/gstrtptheorapay.c: (gst_rtp_theora_pay_base_init),
(gst_rtp_theora_pay_class_init), (gst_rtp_theora_pay_init),
(gst_rtp_theora_pay_setcaps), (gst_rtp_theora_pay_reset_packet),
(gst_rtp_theora_pay_init_packet),
(gst_rtp_theora_pay_flush_packet),
(gst_rtp_theora_pay_finish_headers), (gst_rtp_theora_pay_parse_id),
(gst_rtp_theora_pay_handle_buffer),
(gst_rtp_theora_pay_plugin_init):
* gst/rtp/gstrtptheorapay.h:
Add theora pay/depayloaders.

1 files changed, 581 insertions, 0 deletions

diff --git a/gst/rtp/gstrtptheorapay.c b/gst/rtp/gstrtptheorapay.c
new file mode 100644
index 00000000..d9bd81e6
--- /dev/null
+++ b/gst/rtp/gstrtptheorapay.c
@@ -0,0 +1,581 @@
+/* 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 <string.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtptheorapay.h"
+
+#define THEORA_ID_LEN	42
+
+GST_DEBUG_CATEGORY_STATIC (rtptheorapay_debug);
+#define GST_CAT_DEFAULT (rtptheorapay_debug)
+
+/* references:
+ * http://svn.xiph.org/trunk/theora/doc/draft-ietf-avt-rtp-theora-01.txt
+ */
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_theorapay_details =
+GST_ELEMENT_DETAILS ("RTP packet depayloader",
+    "Codec/Payloader/Network",
+    "Payload-encode Theora video into RTP packets (draft-01 RFC XXXX)",
+    "Wim Taymans <wim@fluendo.com>");
+
+static GstStaticPadTemplate gst_rtp_theora_pay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) [ 96, 127 ], "
+        "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"theora\""
+        /* All required parameters
+         *
+         * "sampling = (string) { "YCbCr-4:2:0", "YCbCr-4:2:2", "YCbCr-4:4:4" } "
+         * "width = (string) [1, 1048561] (multiples of 16) "
+         * "height = (string) [1, 1048561] (multiples of 16) "
+         * "delivery-method = (string) { inline, in_band, out_band/<specific_name> } "
+         * "configuration = (string) ANY"
+         */
+        /* All optional parameters
+         *
+         * "configuration-uri ="
+         */
+    )
+    );
+
+static GstStaticPadTemplate gst_rtp_theora_pay_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-theora")
+    );
+
+GST_BOILERPLATE (GstRtpTheoraPay, gst_rtp_theora_pay, GstBaseRTPPayload,
+    GST_TYPE_BASE_RTP_PAYLOAD);
+
+static gboolean gst_rtp_theora_pay_setcaps (GstBaseRTPPayload * basepayload,
+    GstCaps * caps);
+static GstFlowReturn gst_rtp_theora_pay_handle_buffer (GstBaseRTPPayload * pad,
+    GstBuffer * buffer);
+
+static void
+gst_rtp_theora_pay_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_theora_pay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_theora_pay_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_theorapay_details);
+}
+
+static void
+gst_rtp_theora_pay_class_init (GstRtpTheoraPayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPPayloadClass *gstbasertppayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstbasertppayload_class->set_caps = gst_rtp_theora_pay_setcaps;
+  gstbasertppayload_class->handle_buffer = gst_rtp_theora_pay_handle_buffer;
+
+  GST_DEBUG_CATEGORY_INIT (rtptheorapay_debug, "rtptheorapay", 0,
+      "Theora RTP Payloader");
+}
+
+static void
+gst_rtp_theora_pay_init (GstRtpTheoraPay * rtptheorapay,
+    GstRtpTheoraPayClass * klass)
+{
+}
+
+static gboolean
+gst_rtp_theora_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
+{
+  GstRtpTheoraPay *rtptheorapay;
+
+  rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
+
+  rtptheorapay->need_headers = TRUE;
+
+  return TRUE;
+}
+
+static void
+gst_rtp_theora_pay_reset_packet (GstRtpTheoraPay * rtptheorapay, guint8 TDT)
+{
+  guint payload_len;
+
+  GST_DEBUG_OBJECT (rtptheorapay, "reset packet");
+
+  rtptheorapay->payload_pos = 4;
+  payload_len = gst_rtp_buffer_get_payload_len (rtptheorapay->packet);
+  rtptheorapay->payload_left = payload_len - 4;
+  rtptheorapay->payload_duration = 0;
+  rtptheorapay->payload_F = 0;
+  rtptheorapay->payload_TDT = TDT;
+  rtptheorapay->payload_pkts = 0;
+}
+
+static void
+gst_rtp_theora_pay_init_packet (GstRtpTheoraPay * rtptheorapay, guint8 TDT,
+    GstClockTime timestamp)
+{
+  GST_DEBUG_OBJECT (rtptheorapay, "starting new packet, TDT: %d", TDT);
+
+  if (rtptheorapay->packet)
+    gst_buffer_unref (rtptheorapay->packet);
+
+  /* new packet allocate max packet size */
+  rtptheorapay->packet =
+      gst_rtp_buffer_new_allocate_len (GST_BASE_RTP_PAYLOAD_MTU
+      (rtptheorapay), 0, 0);
+  gst_rtp_theora_pay_reset_packet (rtptheorapay, TDT);
+  GST_BUFFER_TIMESTAMP (rtptheorapay->packet) = timestamp;
+}
+
+static GstFlowReturn
+gst_rtp_theora_pay_flush_packet (GstRtpTheoraPay * rtptheorapay)
+{
+  GstFlowReturn ret;
+  guint8 *payload;
+  guint hlen;
+
+  /* check for empty packet */
+  if (!rtptheorapay->packet || rtptheorapay->payload_pos <= 4)
+    return GST_FLOW_OK;
+
+  GST_DEBUG_OBJECT (rtptheorapay, "flushing packet");
+
+  /* fix header */
+  payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
+  /*
+   *  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
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                     Ident                     | F |TDT|# pkts.|
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   *
+   * F: Fragment type (0=none, 1=start, 2=cont, 3=end)
+   * TDT: Theora data type (0=theora, 1=config, 2=comment, 3=reserved)
+   * pkts: number of packets.
+   */
+  payload[0] = (rtptheorapay->payload_ident >> 16) & 0xff;
+  payload[1] = (rtptheorapay->payload_ident >> 8) & 0xff;
+  payload[2] = (rtptheorapay->payload_ident) & 0xff;
+  payload[3] = (rtptheorapay->payload_F & 0x3) << 6 |
+      (rtptheorapay->payload_TDT & 0x3) << 4 |
+      (rtptheorapay->payload_pkts & 0xf);
+
+  /* shrink the buffer size to the last written byte */
+  hlen = gst_rtp_buffer_calc_header_len (0);
+  GST_BUFFER_SIZE (rtptheorapay->packet) = hlen + rtptheorapay->payload_pos;
+
+  /* push, this gives away our ref to the packet, so clear it. */
+  ret =
+      gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtptheorapay),
+      rtptheorapay->packet);
+  rtptheorapay->packet = NULL;
+
+  return ret;
+}
+
+static gboolean
+gst_rtp_theora_pay_finish_headers (GstBaseRTPPayload * basepayload)
+{
+  GstRtpTheoraPay *rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
+  GList *walk;
+  guint length;
+  gchar *configuration;
+  gchar *wstr, *hstr;
+  guint8 *data;
+  guint32 ident;
+  GValue v = { 0 };
+  GstBuffer *config;
+
+  GST_DEBUG_OBJECT (rtptheorapay, "finish headers");
+
+  if (!rtptheorapay->headers)
+    goto no_headers;
+
+  /* we need exactly 2 header packets */
+  if (g_list_length (rtptheorapay->headers) != 2)
+    goto no_headers;
+
+  /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                     Number of packed headers                  |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                          Packed header                        |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                          Packed header                        |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                          ....                                 |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   *
+   * We only construct a config containing 1 packed header like this:
+   *
+   *  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
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                   Ident                       |              ..
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * ..   length     |              Identification Header           ..
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * ..                    Identification Header                     |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                          Setup Header                        ..
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * ..                         Setup Header                         |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   *
+   */
+
+  /* count the size of the headers first */
+  length = 0;
+  for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
+    GstBuffer *buf = GST_BUFFER_CAST (walk->data);
+
+    length += GST_BUFFER_SIZE (buf);
+  }
+
+  /* total config length is 4 bytes header number + size of the
+   *  headers + 2 bytes length + 3 bytes for the ident */
+  config = gst_buffer_new_and_alloc (length + 4 + 2 + 3);
+  data = GST_BUFFER_DATA (config);
+
+  /* number of packed headers, we only pack 1 header */
+  data[0] = 0;
+  data[1] = 0;
+  data[2] = 0;
+  data[3] = 1;
+
+  /* we generate a random ident for this configuration */
+  ident = rtptheorapay->payload_ident = g_random_int ();
+
+  /* take lower 3 bytes */
+  data[4] = (ident >> 16) & 0xff;
+  data[5] = (ident >> 8) & 0xff;
+  data[6] = ident & 0xff;
+
+  /* store length minus the length of the fixed theora header */
+  data[7] = ((length - THEORA_ID_LEN) >> 8) & 0xff;
+  data[8] = (length - THEORA_ID_LEN) & 0xff;
+
+  /* copy header data */
+  data += 9;
+  for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
+    GstBuffer *buf = GST_BUFFER_CAST (walk->data);
+
+    memcpy (data, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
+    data += GST_BUFFER_SIZE (buf);
+  }
+
+  /* serialize buffer to base16 */
+  g_value_init (&v, GST_TYPE_BUFFER);
+  gst_value_take_buffer (&v, config);
+  configuration = gst_value_serialize (&v);
+
+  /* configure payloader settings */
+  wstr = g_strdup_printf ("%d", rtptheorapay->width);
+  hstr = g_strdup_printf ("%d", rtptheorapay->height);
+  gst_basertppayload_set_options (basepayload, "video", TRUE, "theora", 90000);
+  gst_basertppayload_set_outcaps (basepayload,
+      "sampling", G_TYPE_STRING, "YCbCr-4:2:0",
+      "width", G_TYPE_STRING, wstr,
+      "height", G_TYPE_STRING, hstr,
+      "configuration", G_TYPE_STRING, configuration,
+      "delivery-method", G_TYPE_STRING, "inline",
+      /* don't set the other defaults 
+       */
+      NULL);
+  g_free (wstr);
+  g_free (hstr);
+  g_free (configuration);
+  g_value_unset (&v);
+
+  return TRUE;
+
+  /* ERRORS */
+no_headers:
+  {
+    GST_DEBUG_OBJECT (rtptheorapay, "finish headers");
+    return FALSE;
+  }
+}
+
+static gboolean
+gst_rtp_theora_pay_parse_id (GstBaseRTPPayload * basepayload, guint8 * data,
+    guint size)
+{
+  GstRtpTheoraPay *rtptheorapay;
+  gint width, height;
+
+  rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
+
+  if (G_UNLIKELY (size < 42))
+    goto too_short;
+
+  if (G_UNLIKELY (memcmp (data, "\200theora", 7)))
+    goto invalid_start;
+  data += 7;
+
+  if (G_UNLIKELY (data[0] != 3))
+    goto invalid_version;
+  if (G_UNLIKELY (data[1] != 2))
+    goto invalid_version;
+  data += 3;
+
+  width = GST_READ_UINT16_BE (data) << 4;
+  data += 2;
+  height = GST_READ_UINT16_BE (data) << 4;
+  data += 2;
+
+  /* FIXME, parse pixel format */
+
+  /* store values */
+  rtptheorapay->width = width;
+  rtptheorapay->height = height;
+
+  return TRUE;
+
+  /* ERRORS */
+too_short:
+  {
+    GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
+        (NULL),
+        ("Identification packet is too short, need at least 42, got %d", size));
+    return FALSE;
+  }
+invalid_start:
+  {
+    GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
+        (NULL), ("Invalid header start in identification packet"));
+    return FALSE;
+  }
+invalid_version:
+  {
+    GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
+        (NULL), ("Invalid version"));
+    return FALSE;
+  }
+}
+
+static GstFlowReturn
+gst_rtp_theora_pay_handle_buffer (GstBaseRTPPayload * basepayload,
+    GstBuffer * buffer)
+{
+  GstRtpTheoraPay *rtptheorapay;
+  GstFlowReturn ret;
+  guint size, newsize;
+  guint8 *data;
+  guint packet_len;
+  GstClockTime duration, newduration, timestamp;
+  gboolean flush;
+  guint8 TDT;
+  guint plen;
+  guint8 *ppos, *payload;
+  gboolean fragmented;
+
+  rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
+
+  size = GST_BUFFER_SIZE (buffer);
+  data = GST_BUFFER_DATA (buffer);
+  duration = GST_BUFFER_DURATION (buffer);
+  timestamp = GST_BUFFER_TIMESTAMP (buffer);
+
+  GST_DEBUG_OBJECT (rtptheorapay, "size %u, duration %" GST_TIME_FORMAT,
+      size, GST_TIME_ARGS (duration));
+
+  if (G_UNLIKELY (size < 1 || size > 0xffff))
+    goto wrong_size;
+
+  /* find packet type */
+  if (data[0] & 0x80) {
+    /* header */
+    if (data[0] == 0x80) {
+      /* identification, we need to parse this in order to get the clock rate. */
+      if (G_UNLIKELY (!gst_rtp_theora_pay_parse_id (basepayload, data, size)))
+        goto parse_id_failed;
+      TDT = 1;
+    } else if (data[0] == 0x81) {
+      /* comment */
+      TDT = 2;
+    } else if (data[0] == 0x82) {
+      /* setup */
+      TDT = 1;
+    } else
+      goto unknown_header;
+  } else
+    /* data */
+    TDT = 0;
+
+  if (rtptheorapay->need_headers) {
+    /* we need to collect the headers and construct a config string from them */
+    if (TDT == 2) {
+      GST_DEBUG_OBJECT (rtptheorapay,
+          "discard comment packet while collecting headers");
+      ret = GST_FLOW_OK;
+      goto done;
+    } else if (TDT != 0) {
+      GST_DEBUG_OBJECT (rtptheorapay, "collecting header");
+      /* append header to the list of headers */
+      rtptheorapay->headers = g_list_append (rtptheorapay->headers, buffer);
+      ret = GST_FLOW_OK;
+      goto done;
+    } else {
+      if (!gst_rtp_theora_pay_finish_headers (basepayload))
+        goto header_error;
+      rtptheorapay->need_headers = FALSE;
+    }
+  }
+
+  /* size increases with packet length and 2 bytes size eader. */
+  newduration = rtptheorapay->payload_duration;
+  if (duration != GST_CLOCK_TIME_NONE)
+    newduration += duration;
+
+  newsize = rtptheorapay->payload_pos + 2 + size;
+  packet_len = gst_rtp_buffer_calc_packet_len (newsize, 0, 0);
+
+  /* check buffer filled against length and max latency */
+  flush = gst_basertppayload_is_filled (basepayload, packet_len, newduration);
+  /* we can store up to 15 theora packets in one RTP packet. */
+  flush |= (rtptheorapay->payload_pkts == 15);
+  /* flush if we have a new TDT */
+  if (rtptheorapay->packet)
+    flush |= (rtptheorapay->payload_TDT != TDT);
+  if (flush)
+    ret = gst_rtp_theora_pay_flush_packet (rtptheorapay);
+
+  /* create new packet if we must */
+  if (!rtptheorapay->packet) {
+    gst_rtp_theora_pay_init_packet (rtptheorapay, TDT, timestamp);
+  }
+
+  payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
+  ppos = payload + rtptheorapay->payload_pos;
+  fragmented = FALSE;
+
+  ret = GST_FLOW_OK;
+
+  /* put buffer in packet, it either fits completely or needs to be fragmented
+   * over multiple RTP packets. */
+  while (size) {
+    plen = MIN (rtptheorapay->payload_left - 2, size);
+
+    GST_DEBUG_OBJECT (rtptheorapay, "append %u bytes", plen);
+
+    /* data is copied in the payload with a 2 byte length header */
+    ppos[0] = (plen >> 8) & 0xff;
+    ppos[1] = (plen & 0xff);
+    memcpy (&ppos[2], data, plen);
+
+    size -= plen;
+    data += plen;
+
+    rtptheorapay->payload_pos += plen + 2;
+    rtptheorapay->payload_left -= plen + 2;
+
+    if (fragmented) {
+      if (size == 0)
+        /* last fragment, set F to 0x3. */
+        rtptheorapay->payload_F = 0x3;
+      else
+        /* fragment continues, set F to 0x2. */
+        rtptheorapay->payload_F = 0x2;
+    } else {
+      if (size > 0) {
+        /* fragmented packet starts, set F to 0x1, mark ourselves as
+         * fragmented. */
+        rtptheorapay->payload_F = 0x1;
+        fragmented = TRUE;
+      }
+    }
+    if (fragmented) {
+      /* fragmented packets are always flushed and have ptks of 0 */
+      rtptheorapay->payload_pkts = 0;
+      ret = gst_rtp_theora_pay_flush_packet (rtptheorapay);
+
+      if (size > 0) {
+        /* start new packet and get pointers. TDT stays the same. */
+        gst_rtp_theora_pay_init_packet (rtptheorapay,
+            rtptheorapay->payload_TDT, timestamp);
+        payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
+        ppos = payload + rtptheorapay->payload_pos;
+      }
+    } else {
+      /* unfragmented packet, update stats for next packet, size == 0 and we
+       * exit the while loop */
+      rtptheorapay->payload_pkts++;
+      if (duration != GST_CLOCK_TIME_NONE)
+        rtptheorapay->payload_duration += duration;
+    }
+  }
+done:
+  return ret;
+
+  /* ERRORS */
+wrong_size:
+  {
+    GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
+        ("Invalid packet size (1 < %d <= 0xffff)", size), (NULL));
+    return GST_FLOW_OK;
+  }
+parse_id_failed:
+  {
+    return GST_FLOW_ERROR;
+  }
+unknown_header:
+  {
+    GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
+        (NULL), ("Ignoring unknown header received"));
+    return GST_FLOW_OK;
+  }
+header_error:
+  {
+    GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
+        (NULL), ("Error initializing header config"));
+    return GST_FLOW_OK;
+  }
+}
+
+gboolean
+gst_rtp_theora_pay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtptheorapay",
+      GST_RANK_NONE, GST_TYPE_RTP_THEORA_PAY);
+}