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gstreamer/gst/rtp/gstrtptheorapay.c

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/* GStreamer
* Copyright (C) <2006> 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 <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "fnv1hash.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
*/
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) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) 90000, " "encoding-name = (string) \"THEORA\", "
"delivery-method = (string) \"inline\""
/* 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 GstStateChangeReturn gst_rtp_theora_pay_change_state (GstElement *
element, GstStateChange transition);
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_simple (element_class, "RTP Theora payloader",
"Codec/Payloader/Network",
"Payload-encode Theora video into RTP packets (draft-01 RFC XXXX)",
"Wim Taymans <wim.taymans@gmail.com>");
}
static void
gst_rtp_theora_pay_class_init (GstRtpTheoraPayClass * klass)
{
GstElementClass *gstelement_class;
GstBaseRTPPayloadClass *gstbasertppayload_class;
gstelement_class = (GstElementClass *) klass;
gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
gstelement_class->change_state = gst_rtp_theora_pay_change_state;
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)
{
/* needed because of GST_BOILERPLATE */
}
static void
gst_rtp_theora_pay_cleanup (GstRtpTheoraPay * rtptheorapay)
{
g_list_foreach (rtptheorapay->headers, (GFunc) gst_mini_object_unref, NULL);
g_list_free (rtptheorapay->headers);
rtptheorapay->headers = NULL;
if (rtptheorapay->packet)
gst_buffer_unref (rtptheorapay->packet);
rtptheorapay->packet = NULL;
}
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;
GST_BUFFER_DURATION (rtptheorapay->packet) = rtptheorapay->payload_duration;
/* 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, size, n_headers, configlen;
gchar *wstr, *hstr, *configuration;
guint8 *data, *config;
guint32 ident;
gboolean res;
GST_DEBUG_OBJECT (rtptheorapay, "finish headers");
if (!rtptheorapay->headers) {
GST_DEBUG_OBJECT (rtptheorapay, "We need 2 headers but have none");
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 ..
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .. | n. of headers | length1 | length2 ..
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .. | Identification Header ..
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .................................................................
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .. | Comment Header ..
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .................................................................
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .. Comment Header |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Setup Header ..
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .................................................................
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* .. Setup Header |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/* we need 4 bytes for the number of headers (which is always 1), 3 bytes for
* the ident, 2 bytes for length, 1 byte for n. of headers. */
size = 4 + 3 + 2 + 1;
/* count the size of the headers first and update the hash */
length = 0;
n_headers = 0;
ident = fnv1_hash_32_new ();
for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
guint bsize;
bsize = GST_BUFFER_SIZE (buf);
length += bsize;
n_headers++;
/* count number of bytes needed for length fields, we don't need this for
* the last header. */
if (g_list_next (walk)) {
do {
size++;
bsize >>= 7;
} while (bsize);
}
/* update hash */
ident = fnv1_hash_32_update (ident, GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf));
}
/* packet length is header size + packet length */
configlen = size + length;
config = data = g_malloc (configlen);
/* number of packed headers, we only pack 1 header */
data[0] = 0;
data[1] = 0;
data[2] = 0;
data[3] = 1;
ident = fnv1_hash_32_to_24 (ident);
rtptheorapay->payload_ident = ident;
GST_DEBUG_OBJECT (rtptheorapay, "ident 0x%08x", ident);
/* take lower 3 bytes */
data[4] = (ident >> 16) & 0xff;
data[5] = (ident >> 8) & 0xff;
data[6] = ident & 0xff;
/* store length of all theora headers */
data[7] = ((length) >> 8) & 0xff;
data[8] = (length) & 0xff;
/* store number of headers minus one. */
data[9] = n_headers - 1;
data += 10;
/* store length for each header */
for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
guint bsize, size, temp;
guint flag;
/* only need to store the length when it's not the last header */
if (!g_list_next (walk))
break;
bsize = GST_BUFFER_SIZE (buf);
/* calc size */
size = 0;
do {
size++;
bsize >>= 7;
} while (bsize);
temp = size;
bsize = GST_BUFFER_SIZE (buf);
/* write the size backwards */
flag = 0;
while (size) {
size--;
data[size] = (bsize & 0x7f) | flag;
bsize >>= 7;
flag = 0x80;
}
data += temp;
}
/* copy header data */
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 to base64 */
configuration = g_base64_encode (config, configlen);
g_free (config);
/* 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);
res = 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);
return res;
/* 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 != 0) {
GST_DEBUG_OBJECT (rtptheorapay, "collecting header, buffer %p", buffer);
/* 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)
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;
}
}
gst_buffer_unref (buffer);
done:
return ret;
/* ERRORS */
wrong_size:
{
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
("Invalid packet size (1 < %d <= 0xffff)", size), (NULL));
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
parse_id_failed:
{
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
unknown_header:
{
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
(NULL), ("Ignoring unknown header received"));
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
header_error:
{
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
(NULL), ("Error initializing header config"));
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
}
static GstStateChangeReturn
gst_rtp_theora_pay_change_state (GstElement * element,
GstStateChange transition)
{
GstRtpTheoraPay *rtptheorapay;
GstStateChangeReturn ret;
rtptheorapay = GST_RTP_THEORA_PAY (element);
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rtp_theora_pay_cleanup (rtptheorapay);
break;
default:
break;
}
return ret;
}
gboolean
gst_rtp_theora_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtptheorapay",
GST_RANK_NONE, GST_TYPE_RTP_THEORA_PAY);
}
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