mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
224 lines
7.3 KiB
C
224 lines
7.3 KiB
C
/* GStreamer
|
|
* Copyright (C) <2007> Thijs Vermeir <thijsvermeir@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 <stdlib.h>
|
|
#include <string.h>
|
|
#include <gst/rtp/gstrtpbuffer.h>
|
|
|
|
#include "gstrtpmpvpay.h"
|
|
|
|
static const GstElementDetails gst_rtp_mpv_pay_details =
|
|
GST_ELEMENT_DETAILS ("RTP MPEG2 ES video payloader",
|
|
"Codec/Payloader/Network",
|
|
"Payload-encodes MPEG2 ES into RTP packets (RFC 2250)",
|
|
"Thijs Vermeir <thijsvermeir@gmail.com>");
|
|
|
|
static GstStaticPadTemplate gst_rtp_mpv_pay_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/mpeg, "
|
|
"mpegversion = (int) 2, systemstream = (boolean) FALSE")
|
|
);
|
|
|
|
static GstStaticPadTemplate gst_rtp_mpv_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_MPV_STRING ", "
|
|
"clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\"")
|
|
);
|
|
|
|
static gboolean gst_rtp_mpv_pay_setcaps (GstBaseRTPPayload * payload,
|
|
GstCaps * caps);
|
|
static GstFlowReturn gst_rtp_mpv_pay_handle_buffer (GstBaseRTPPayload *
|
|
payload, GstBuffer * buffer);
|
|
static GstFlowReturn gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay,
|
|
GstClockTime timestamp, GstClockTime duration);
|
|
static void gst_rtp_mpv_pay_finalize (GObject * object);
|
|
|
|
GST_BOILERPLATE (GstRTPMPVPay, gst_rtp_mpv_pay, GstBaseRTPPayload,
|
|
GST_TYPE_BASE_RTP_PAYLOAD);
|
|
|
|
static void
|
|
gst_rtp_mpv_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_mpv_pay_sink_template));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_rtp_mpv_pay_src_template));
|
|
gst_element_class_set_details (element_class, &gst_rtp_mpv_pay_details);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mpv_pay_class_init (GstRTPMPVPayClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstBaseRTPPayloadClass *gstbasertppayload_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
|
|
|
|
gobject_class->finalize = gst_rtp_mpv_pay_finalize;
|
|
|
|
gstbasertppayload_class->set_caps = gst_rtp_mpv_pay_setcaps;
|
|
gstbasertppayload_class->handle_buffer = gst_rtp_mpv_pay_handle_buffer;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mpv_pay_init (GstRTPMPVPay * rtpmpvpay, GstRTPMPVPayClass * klass)
|
|
{
|
|
GST_BASE_RTP_PAYLOAD (rtpmpvpay)->clock_rate = 90000;
|
|
GST_BASE_RTP_PAYLOAD_PT (rtpmpvpay) = GST_RTP_PAYLOAD_MPV;
|
|
|
|
rtpmpvpay->adapter = gst_adapter_new ();
|
|
}
|
|
|
|
static void
|
|
gst_rtp_mpv_pay_finalize (GObject * object)
|
|
{
|
|
GstRTPMPVPay *rtpmpvpay;
|
|
|
|
rtpmpvpay = GST_RTP_MPV_PAY (object);
|
|
|
|
g_object_unref (rtpmpvpay->adapter);
|
|
rtpmpvpay->adapter = NULL;
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_mpv_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
|
|
{
|
|
gst_basertppayload_set_options (payload, "video", FALSE, "MPV", 90000);
|
|
return gst_basertppayload_set_outcaps (payload, NULL);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay, GstClockTime timestamp,
|
|
GstClockTime duration)
|
|
{
|
|
GstBuffer *outbuf;
|
|
GstFlowReturn ret;
|
|
guint avail;
|
|
guint8 *payload;
|
|
gint packet_size;
|
|
gint payload_size;
|
|
|
|
avail = gst_adapter_available (rtpmpvpay->adapter);
|
|
packet_size = gst_rtp_buffer_calc_packet_len (4 + avail, 0, 0);
|
|
|
|
/* check for the maximum size of the rtp buffer */
|
|
if (packet_size > GST_BASE_RTP_PAYLOAD_MTU (rtpmpvpay)) {
|
|
payload_size =
|
|
GST_BASE_RTP_PAYLOAD_MTU (rtpmpvpay) -
|
|
gst_rtp_buffer_calc_packet_len (4, 0, 0);
|
|
} else {
|
|
payload_size = avail;
|
|
}
|
|
outbuf = gst_rtp_buffer_new_allocate (4 + payload_size, 0, 0);
|
|
/* enable MPEG Video-specific header
|
|
*
|
|
* 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
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | MBZ |T| TR | |N|S|B|E| P | | BFC | | FFC |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* AN FBV FFV
|
|
*/
|
|
payload = gst_rtp_buffer_get_payload (outbuf);
|
|
/* fill in the MPEG Video-specific header */
|
|
memset (payload, 0x0, 4);
|
|
/* copy stuff from adapter to payload */
|
|
gst_adapter_copy (rtpmpvpay->adapter, payload + 4, 0, payload_size);
|
|
GST_BUFFER_TIMESTAMP (outbuf) = rtpmpvpay->first_ts;
|
|
GST_BUFFER_DURATION (outbuf) = rtpmpvpay->duration;
|
|
|
|
GST_DEBUG_OBJECT (rtpmpvpay, "pushing buffer of size %d",
|
|
GST_BUFFER_SIZE (outbuf));
|
|
ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpmpvpay), outbuf);
|
|
gst_adapter_flush (rtpmpvpay->adapter, payload_size);
|
|
|
|
/* update the timestamp and duration */
|
|
rtpmpvpay->first_ts = timestamp;
|
|
rtpmpvpay->duration = duration;
|
|
|
|
/* check if there is enough data for another rtp buffer */
|
|
avail = gst_adapter_available (rtpmpvpay->adapter);
|
|
packet_size = gst_rtp_buffer_calc_packet_len (4 + avail, 0, 0);
|
|
|
|
if (packet_size >= GST_BASE_RTP_PAYLOAD_MTU (rtpmpvpay) && ret == GST_FLOW_OK) {
|
|
GST_DEBUG_OBJECT (rtpmpvpay, "Have enough data for another rtp packet");
|
|
ret = gst_rtp_mpv_pay_flush (rtpmpvpay, timestamp, duration);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_mpv_pay_handle_buffer (GstBaseRTPPayload * basepayload,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstRTPMPVPay *rtpmpvpay;
|
|
guint avail, packet_len;
|
|
GstClockTime timestamp, duration;
|
|
GstFlowReturn ret;
|
|
|
|
rtpmpvpay = GST_RTP_MPV_PAY (basepayload);
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
|
|
gst_adapter_push (rtpmpvpay->adapter, buffer);
|
|
avail = gst_adapter_available (rtpmpvpay->adapter);
|
|
|
|
/* Initialize new RTP payload */
|
|
if (avail == 0) {
|
|
rtpmpvpay->first_ts = timestamp;
|
|
rtpmpvpay->duration = duration;
|
|
}
|
|
|
|
/* get packet length of previous data and this new data,
|
|
* payload length includes a 4 byte MPEG video-specific header */
|
|
packet_len = gst_rtp_buffer_calc_packet_len (4 + avail, 0, 0);
|
|
|
|
if (gst_basertppayload_is_filled (basepayload,
|
|
packet_len, rtpmpvpay->duration + duration)) {
|
|
ret = gst_rtp_mpv_pay_flush (rtpmpvpay, timestamp, duration);
|
|
} else {
|
|
if (GST_CLOCK_TIME_IS_VALID (duration))
|
|
rtpmpvpay->duration += duration;
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_mpv_pay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpmpvpay",
|
|
GST_RANK_NONE, GST_TYPE_RTP_MPV_PAY);
|
|
}
|