2 * Copyright (C) <2007> Thijs Vermeir <thijsvermeir@gmail.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
26 #include <gst/rtp/gstrtpbuffer.h>
27 #include <gst/video/video.h>
29 #include "gstrtpmpvpay.h"
30 #include "gstrtputils.h"
32 GST_DEBUG_CATEGORY_STATIC (rtpmpvpay_debug);
33 #define GST_CAT_DEFAULT (rtpmpvpay_debug)
35 static GstStaticPadTemplate gst_rtp_mpv_pay_sink_template =
36 GST_STATIC_PAD_TEMPLATE ("sink",
39 GST_STATIC_CAPS ("video/mpeg, "
40 "mpegversion = (int) 2, systemstream = (boolean) FALSE")
43 static GstStaticPadTemplate gst_rtp_mpv_pay_src_template =
44 GST_STATIC_PAD_TEMPLATE ("src",
47 GST_STATIC_CAPS ("application/x-rtp, "
48 "media = (string) \"video\", "
49 "payload = (int) " GST_RTP_PAYLOAD_MPV_STRING ", "
50 "clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\"; "
52 "media = (string) \"video\", "
53 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
54 "clock-rate = (int) 90000, " "encoding-name = (string) \"MPV\"")
57 static GstStateChangeReturn gst_rtp_mpv_pay_change_state (GstElement * element,
58 GstStateChange transition);
60 static void gst_rtp_mpv_pay_finalize (GObject * object);
62 static GstFlowReturn gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay);
63 static gboolean gst_rtp_mpv_pay_setcaps (GstRTPBasePayload * payload,
65 static GstFlowReturn gst_rtp_mpv_pay_handle_buffer (GstRTPBasePayload *
66 payload, GstBuffer * buffer);
67 static gboolean gst_rtp_mpv_pay_sink_event (GstRTPBasePayload * payload,
70 #define gst_rtp_mpv_pay_parent_class parent_class
71 G_DEFINE_TYPE (GstRTPMPVPay, gst_rtp_mpv_pay, GST_TYPE_RTP_BASE_PAYLOAD);
74 gst_rtp_mpv_pay_class_init (GstRTPMPVPayClass * klass)
76 GObjectClass *gobject_class;
77 GstElementClass *gstelement_class;
78 GstRTPBasePayloadClass *gstrtpbasepayload_class;
80 gobject_class = (GObjectClass *) klass;
81 gstelement_class = (GstElementClass *) klass;
82 gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
84 gobject_class->finalize = gst_rtp_mpv_pay_finalize;
86 gstelement_class->change_state = gst_rtp_mpv_pay_change_state;
88 gst_element_class_add_static_pad_template (gstelement_class,
89 &gst_rtp_mpv_pay_sink_template);
90 gst_element_class_add_static_pad_template (gstelement_class,
91 &gst_rtp_mpv_pay_src_template);
93 gst_element_class_set_static_metadata (gstelement_class,
94 "RTP MPEG2 ES video payloader", "Codec/Payloader/Network/RTP",
95 "Payload-encodes MPEG2 ES into RTP packets (RFC 2250)",
96 "Thijs Vermeir <thijsvermeir@gmail.com>");
98 gstrtpbasepayload_class->set_caps = gst_rtp_mpv_pay_setcaps;
99 gstrtpbasepayload_class->handle_buffer = gst_rtp_mpv_pay_handle_buffer;
100 gstrtpbasepayload_class->sink_event = gst_rtp_mpv_pay_sink_event;
102 GST_DEBUG_CATEGORY_INIT (rtpmpvpay_debug, "rtpmpvpay", 0,
103 "MPEG2 ES Video RTP Payloader");
107 gst_rtp_mpv_pay_init (GstRTPMPVPay * rtpmpvpay)
109 GST_RTP_BASE_PAYLOAD (rtpmpvpay)->clock_rate = 90000;
110 GST_RTP_BASE_PAYLOAD_PT (rtpmpvpay) = GST_RTP_PAYLOAD_MPV;
112 rtpmpvpay->adapter = gst_adapter_new ();
116 gst_rtp_mpv_pay_finalize (GObject * object)
118 GstRTPMPVPay *rtpmpvpay;
120 rtpmpvpay = GST_RTP_MPV_PAY (object);
122 g_object_unref (rtpmpvpay->adapter);
123 rtpmpvpay->adapter = NULL;
125 G_OBJECT_CLASS (parent_class)->finalize (object);
129 gst_rtp_mpv_pay_reset (GstRTPMPVPay * pay)
133 gst_adapter_clear (pay->adapter);
134 GST_DEBUG_OBJECT (pay, "reset depayloader");
138 gst_rtp_mpv_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
140 gst_rtp_base_payload_set_options (payload, "video",
141 payload->pt != GST_RTP_PAYLOAD_MPV, "MPV", 90000);
142 return gst_rtp_base_payload_set_outcaps (payload, NULL);
146 gst_rtp_mpv_pay_sink_event (GstRTPBasePayload * payload, GstEvent * event)
149 GstRTPMPVPay *rtpmpvpay;
151 rtpmpvpay = GST_RTP_MPV_PAY (payload);
153 switch (GST_EVENT_TYPE (event)) {
155 /* make sure we push the last packets in the adapter on EOS */
156 gst_rtp_mpv_pay_flush (rtpmpvpay);
158 case GST_EVENT_FLUSH_STOP:
159 gst_rtp_mpv_pay_reset (rtpmpvpay);
165 ret = GST_RTP_BASE_PAYLOAD_CLASS (parent_class)->sink_event (payload, event);
170 #define RTP_HEADER_LEN 12
173 gst_rtp_mpv_pay_flush (GstRTPMPVPay * rtpmpvpay)
182 avail = gst_adapter_available (rtpmpvpay->adapter);
187 gst_buffer_list_new_sized (avail / (GST_RTP_BASE_PAYLOAD_MTU (rtpmpvpay) -
188 RTP_HEADER_LEN) + 1);
194 GstRTPBuffer rtp = { NULL };
197 packet_len = gst_rtp_buffer_calc_packet_len (avail + 4, 0, 0);
199 towrite = MIN (packet_len, GST_RTP_BASE_PAYLOAD_MTU (rtpmpvpay));
201 payload_len = gst_rtp_buffer_calc_payload_len (towrite, 0, 0);
203 outbuf = gst_rtp_buffer_new_allocate (4, 0, 0);
207 gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
209 payload = gst_rtp_buffer_get_payload (&rtp);
210 /* enable MPEG Video-specific header
213 * 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
214 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
215 * | MBZ |T| TR | |N|S|B|E| P | | BFC | | FFC |
216 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
220 /* fill in the MPEG Video-specific header
221 * data is set to 0x0 here
223 memset (payload, 0x0, 4);
225 avail -= payload_len;
227 gst_rtp_buffer_set_marker (&rtp, avail == 0);
228 gst_rtp_buffer_unmap (&rtp);
230 paybuf = gst_adapter_take_buffer_fast (rtpmpvpay->adapter, payload_len);
231 gst_rtp_copy_meta (GST_ELEMENT_CAST (rtpmpvpay), outbuf, paybuf,
232 g_quark_from_static_string (GST_META_TAG_VIDEO_STR));
233 outbuf = gst_buffer_append (outbuf, paybuf);
235 GST_BUFFER_PTS (outbuf) = rtpmpvpay->first_ts;
236 gst_buffer_list_add (list, outbuf);
239 ret = gst_rtp_base_payload_push_list (GST_RTP_BASE_PAYLOAD (rtpmpvpay), list);
245 gst_rtp_mpv_pay_handle_buffer (GstRTPBasePayload * basepayload,
248 GstRTPMPVPay *rtpmpvpay;
249 guint avail, packet_len;
250 GstClockTime timestamp, duration;
251 GstFlowReturn ret = GST_FLOW_OK;
253 rtpmpvpay = GST_RTP_MPV_PAY (basepayload);
255 timestamp = GST_BUFFER_PTS (buffer);
256 duration = GST_BUFFER_DURATION (buffer);
258 if (GST_BUFFER_IS_DISCONT (buffer)) {
259 GST_DEBUG_OBJECT (rtpmpvpay, "DISCONT");
260 gst_rtp_mpv_pay_reset (rtpmpvpay);
263 avail = gst_adapter_available (rtpmpvpay->adapter);
268 if (rtpmpvpay->first_ts == GST_CLOCK_TIME_NONE || avail == 0)
269 rtpmpvpay->first_ts = timestamp;
272 rtpmpvpay->duration = duration;
274 rtpmpvpay->duration += duration;
277 gst_adapter_push (rtpmpvpay->adapter, buffer);
278 avail = gst_adapter_available (rtpmpvpay->adapter);
280 /* get packet length of previous data and this new data,
281 * payload length includes a 4 byte MPEG video-specific header */
282 packet_len = gst_rtp_buffer_calc_packet_len (avail, 4, 0);
283 GST_LOG_OBJECT (rtpmpvpay, "available %d, rtp packet length %d", avail,
286 if (gst_rtp_base_payload_is_filled (basepayload,
287 packet_len, rtpmpvpay->duration)) {
288 ret = gst_rtp_mpv_pay_flush (rtpmpvpay);
290 rtpmpvpay->first_ts = timestamp;
296 static GstStateChangeReturn
297 gst_rtp_mpv_pay_change_state (GstElement * element, GstStateChange transition)
299 GstRTPMPVPay *rtpmpvpay;
300 GstStateChangeReturn ret;
302 rtpmpvpay = GST_RTP_MPV_PAY (element);
304 switch (transition) {
305 case GST_STATE_CHANGE_READY_TO_PAUSED:
306 gst_rtp_mpv_pay_reset (rtpmpvpay);
312 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
314 switch (transition) {
315 case GST_STATE_CHANGE_PAUSED_TO_READY:
316 gst_rtp_mpv_pay_reset (rtpmpvpay);
326 gst_rtp_mpv_pay_plugin_init (GstPlugin * plugin)
328 return gst_element_register (plugin, "rtpmpvpay",
329 GST_RANK_SECONDARY, GST_TYPE_RTP_MPV_PAY);