/*
* Microsoft Lync RTP x-data Payloader Gst Element
*
* Copyright 2014 Collabora Ltd.
* @author: Olivier Crete <olivier.crete@collabora.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "fsrtpxdatapay.h"
#include <gst/rtp/gstrtpbuffer.h>
GST_DEBUG_CATEGORY_STATIC (rtpxdatapay_debug);
#define GST_CAT_DEFAULT (rtpxdatapay_debug)
static GstStaticPadTemplate fs_rtp_xdata_pay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/octet-stream")
);
static GstStaticPadTemplate fs_rtp_xdata_pay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"application\", "
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) 90000, "
"encoding-name = (string) \"X-DATA\"")
);
#define MAX_PAYLOAD_SIZE 1200
static gboolean fs_rtp_xdata_pay_setcaps (GstRTPBasePayload * payload,
GstCaps * caps);
static GstFlowReturn fs_rtp_xdata_pay_handle_buffer (GstRTPBasePayload *payload,
GstBuffer *buffer);
G_DEFINE_TYPE (FsRTPXdataPay, fs_rtp_xdata_pay,
GST_TYPE_RTP_BASE_PAYLOAD);
static void
fs_rtp_xdata_pay_class_init (FsRTPXdataPayClass * klass)
{
GstElementClass *gstelement_class;
GstRTPBasePayloadClass *gstrtpbasepayload_class;
gstelement_class = (GstElementClass *) klass;
gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
gstrtpbasepayload_class->set_caps = fs_rtp_xdata_pay_setcaps;
gstrtpbasepayload_class->handle_buffer = fs_rtp_xdata_pay_handle_buffer;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&fs_rtp_xdata_pay_sink_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&fs_rtp_xdata_pay_src_template));
gst_element_class_set_static_metadata (gstelement_class,
"RTP Payloader for Microsoft Lync x-data", "Codec/Payloader/Network/RTP",
"Packetize Microsoft Lync x-data streams into RTP packets",
"Olivier Crete <olivier.crete@collabora.com>");
GST_DEBUG_CATEGORY_INIT (rtpxdatapay_debug, "fsrtpxdatapay", 0,
"Microsoft Lync x-data RTP payloader");
}
static void
fs_rtp_xdata_pay_init (FsRTPXdataPay * rtpxdatapay)
{
GstRTPBasePayload *rtpbasepayload;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (rtpxdatapay);
gst_rtp_base_payload_set_options (rtpbasepayload, "application", TRUE,
"X-DATA", 90000);
GST_RTP_BASE_PAYLOAD_MTU(rtpbasepayload) = MAX_PAYLOAD_SIZE +
gst_rtp_buffer_calc_header_len (0);
}
static gboolean
fs_rtp_xdata_pay_setcaps (GstRTPBasePayload * rtpbasepayload, GstCaps * caps)
{
return gst_rtp_base_payload_set_outcaps (rtpbasepayload, NULL);
}
static GstFlowReturn
fs_rtp_xdata_pay_handle_buffer (GstRTPBasePayload *payload, GstBuffer *buffer)
{
GstBuffer *rtpbuf;
gsize size;
guint mtu;
size = gst_buffer_get_size (buffer);
mtu = GST_RTP_BASE_PAYLOAD_MTU(payload);
mtu -= gst_rtp_buffer_calc_header_len (0);
if (size <= mtu) {
rtpbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
rtpbuf = gst_buffer_append (rtpbuf, buffer);
return gst_rtp_base_payload_push (payload, rtpbuf);
} else {
GstBufferList *rtplist = gst_buffer_list_new_sized (2);
gsize offset = 0;
gsize new_size;
while (size > 0) {
new_size = size > mtu ? mtu : size;
rtpbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
gst_buffer_copy_into (rtpbuf, buffer, GST_BUFFER_COPY_MEMORY |
GST_BUFFER_COPY_TIMESTAMPS, offset, new_size);
gst_buffer_list_add (rtplist, rtpbuf);
offset += new_size;
size -= new_size;
}
gst_buffer_unref (buffer);
return gst_rtp_base_payload_push_list (payload, rtplist);
}
}
gboolean
fs_rtp_xdata_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "fsrtpxdatapay",
GST_RANK_SECONDARY, FS_TYPE_RTP_XDATA_PAY);
}