2 * Copyright (C) <2007> Wim Taymans <wim.taymans@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>
28 #include "gstrtpmp2tpay.h"
29 #include "gstrtputils.h"
31 static GstStaticPadTemplate gst_rtp_mp2t_pay_sink_template =
32 GST_STATIC_PAD_TEMPLATE ("sink",
35 GST_STATIC_CAPS ("video/mpegts,"
36 "packetsize=(int)188," "systemstream=(boolean)true")
39 static GstStaticPadTemplate gst_rtp_mp2t_pay_src_template =
40 GST_STATIC_PAD_TEMPLATE ("src",
43 GST_STATIC_CAPS ("application/x-rtp, "
44 "media = (string) \"video\", "
45 "payload = (int) " GST_RTP_PAYLOAD_MP2T_STRING ", "
46 "clock-rate = (int) 90000, " "encoding-name = (string) \"MP2T\" ; "
48 "media = (string) \"video\", "
49 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
50 "clock-rate = (int) 90000, " "encoding-name = (string) \"MP2T\"")
53 static gboolean gst_rtp_mp2t_pay_setcaps (GstRTPBasePayload * payload,
55 static GstFlowReturn gst_rtp_mp2t_pay_handle_buffer (GstRTPBasePayload *
56 payload, GstBuffer * buffer);
57 static GstFlowReturn gst_rtp_mp2t_pay_flush (GstRTPMP2TPay * rtpmp2tpay);
58 static void gst_rtp_mp2t_pay_finalize (GObject * object);
60 #define gst_rtp_mp2t_pay_parent_class parent_class
61 G_DEFINE_TYPE (GstRTPMP2TPay, gst_rtp_mp2t_pay, GST_TYPE_RTP_BASE_PAYLOAD);
64 gst_rtp_mp2t_pay_class_init (GstRTPMP2TPayClass * klass)
66 GObjectClass *gobject_class;
67 GstElementClass *gstelement_class;
68 GstRTPBasePayloadClass *gstrtpbasepayload_class;
70 gobject_class = (GObjectClass *) klass;
71 gstelement_class = (GstElementClass *) klass;
72 gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
74 gobject_class->finalize = gst_rtp_mp2t_pay_finalize;
76 gstrtpbasepayload_class->set_caps = gst_rtp_mp2t_pay_setcaps;
77 gstrtpbasepayload_class->handle_buffer = gst_rtp_mp2t_pay_handle_buffer;
79 gst_element_class_add_static_pad_template (gstelement_class,
80 &gst_rtp_mp2t_pay_sink_template);
81 gst_element_class_add_static_pad_template (gstelement_class,
82 &gst_rtp_mp2t_pay_src_template);
83 gst_element_class_set_static_metadata (gstelement_class,
84 "RTP MPEG2 Transport Stream payloader", "Codec/Payloader/Network/RTP",
85 "Payload-encodes MPEG2 TS into RTP packets (RFC 2250)",
86 "Wim Taymans <wim.taymans@gmail.com>");
90 gst_rtp_mp2t_pay_init (GstRTPMP2TPay * rtpmp2tpay)
92 GST_RTP_BASE_PAYLOAD (rtpmp2tpay)->clock_rate = 90000;
93 GST_RTP_BASE_PAYLOAD_PT (rtpmp2tpay) = GST_RTP_PAYLOAD_MP2T;
95 rtpmp2tpay->adapter = gst_adapter_new ();
99 gst_rtp_mp2t_pay_finalize (GObject * object)
101 GstRTPMP2TPay *rtpmp2tpay;
103 rtpmp2tpay = GST_RTP_MP2T_PAY (object);
105 g_object_unref (rtpmp2tpay->adapter);
106 rtpmp2tpay->adapter = NULL;
108 G_OBJECT_CLASS (parent_class)->finalize (object);
112 gst_rtp_mp2t_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
116 gst_rtp_base_payload_set_options (payload, "video",
117 payload->pt != GST_RTP_PAYLOAD_MP2T, "MP2T", 90000);
118 res = gst_rtp_base_payload_set_outcaps (payload, NULL);
124 gst_rtp_mp2t_pay_flush (GstRTPMP2TPay * rtpmp2tpay)
127 GstFlowReturn ret = GST_FLOW_OK;
130 avail = gst_adapter_available (rtpmp2tpay->adapter);
132 mtu = GST_RTP_BASE_PAYLOAD_MTU (rtpmp2tpay);
134 while (avail > 0 && (ret == GST_FLOW_OK)) {
140 /* this will be the total length of the packet */
141 packet_len = gst_rtp_buffer_calc_packet_len (avail, 0, 0);
143 /* fill one MTU or all available bytes */
144 towrite = MIN (packet_len, mtu);
146 /* this is the payload length */
147 payload_len = gst_rtp_buffer_calc_payload_len (towrite, 0, 0);
148 payload_len -= payload_len % 188;
150 /* need whole packets */
154 /* create buffer to hold the payload */
155 outbuf = gst_rtp_buffer_new_allocate (0, 0, 0);
158 paybuf = gst_adapter_take_buffer_fast (rtpmp2tpay->adapter, payload_len);
159 gst_rtp_copy_meta (GST_ELEMENT_CAST (rtpmp2tpay), outbuf, paybuf, 0);
160 outbuf = gst_buffer_append (outbuf, paybuf);
161 avail -= payload_len;
163 GST_BUFFER_PTS (outbuf) = rtpmp2tpay->first_ts;
164 GST_BUFFER_DURATION (outbuf) = rtpmp2tpay->duration;
166 GST_DEBUG_OBJECT (rtpmp2tpay, "pushing buffer of size %u",
167 (guint) gst_buffer_get_size (outbuf));
169 ret = gst_rtp_base_payload_push (GST_RTP_BASE_PAYLOAD (rtpmp2tpay), outbuf);
176 gst_rtp_mp2t_pay_handle_buffer (GstRTPBasePayload * basepayload,
179 GstRTPMP2TPay *rtpmp2tpay;
180 guint size, avail, packet_len;
181 GstClockTime timestamp, duration;
184 rtpmp2tpay = GST_RTP_MP2T_PAY (basepayload);
186 size = gst_buffer_get_size (buffer);
187 timestamp = GST_BUFFER_PTS (buffer);
188 duration = GST_BUFFER_DURATION (buffer);
192 avail = gst_adapter_available (rtpmp2tpay->adapter);
194 /* Initialize new RTP payload */
196 rtpmp2tpay->first_ts = timestamp;
197 rtpmp2tpay->duration = duration;
200 /* get packet length of previous data and this new data */
201 packet_len = gst_rtp_buffer_calc_packet_len (avail + size, 0, 0);
203 /* if this buffer is going to overflow the packet, flush what we have,
204 * or if upstream is handing us several packets, to keep latency low */
205 if (!size || gst_rtp_base_payload_is_filled (basepayload,
206 packet_len, rtpmp2tpay->duration + duration)) {
207 ret = gst_rtp_mp2t_pay_flush (rtpmp2tpay);
208 rtpmp2tpay->first_ts = timestamp;
209 rtpmp2tpay->duration = duration;
211 /* keep filling the payload */
213 if (GST_CLOCK_TIME_IS_VALID (duration))
214 rtpmp2tpay->duration += duration;
217 /* copy buffer to adapter */
219 gst_adapter_push (rtpmp2tpay->adapter, buffer);
223 if (size >= (188 * 2)) {
233 gst_rtp_mp2t_pay_plugin_init (GstPlugin * plugin)
235 return gst_element_register (plugin, "rtpmp2tpay",
236 GST_RANK_SECONDARY, GST_TYPE_RTP_MP2T_PAY);