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., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
26 #include <gst/rtp/gstrtpbuffer.h>
28 #include "gstrtpmp2tpay.h"
30 /* elementfactory information */
31 static const GstElementDetails gst_rtp_mp2t_pay_details =
32 GST_ELEMENT_DETAILS ("RTP MPEG2 Transport Stream payloader",
33 "Codec/Payloader/Network",
34 "Payload-encodes MPEG2 TS into RTP packets (RFC 2250)",
35 "Wim Taymans <wim.taymans@gmail.com>");
37 static GstStaticPadTemplate gst_rtp_mp2t_pay_sink_template =
38 GST_STATIC_PAD_TEMPLATE ("sink",
41 GST_STATIC_CAPS ("video/mpegts,"
42 "packetsize=(int)188," "systemstream=(boolean)true")
45 static GstStaticPadTemplate gst_rtp_mp2t_pay_src_template =
46 GST_STATIC_PAD_TEMPLATE ("src",
49 GST_STATIC_CAPS ("application/x-rtp, "
50 "media = (string) \"video\", "
51 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
52 "clock-rate = (int) 90000, " "encoding-name = (string) \"MP2T-ES\"")
55 static gboolean gst_rtp_mp2t_pay_setcaps (GstBaseRTPPayload * payload,
57 static GstFlowReturn gst_rtp_mp2t_pay_handle_buffer (GstBaseRTPPayload *
58 payload, GstBuffer * buffer);
59 static GstFlowReturn gst_rtp_mp2t_pay_flush (GstRTPMP2TPay * rtpmp2tpay);
60 static void gst_rtp_mp2t_pay_finalize (GObject * object);
62 GST_BOILERPLATE (GstRTPMP2TPay, gst_rtp_mp2t_pay, GstBaseRTPPayload,
63 GST_TYPE_BASE_RTP_PAYLOAD);
66 gst_rtp_mp2t_pay_base_init (gpointer klass)
68 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
70 gst_element_class_add_pad_template (element_class,
71 gst_static_pad_template_get (&gst_rtp_mp2t_pay_sink_template));
72 gst_element_class_add_pad_template (element_class,
73 gst_static_pad_template_get (&gst_rtp_mp2t_pay_src_template));
74 gst_element_class_set_details (element_class, &gst_rtp_mp2t_pay_details);
78 gst_rtp_mp2t_pay_class_init (GstRTPMP2TPayClass * klass)
80 GObjectClass *gobject_class;
81 GstBaseRTPPayloadClass *gstbasertppayload_class;
83 gobject_class = (GObjectClass *) klass;
84 gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
86 gobject_class->finalize = gst_rtp_mp2t_pay_finalize;
88 gstbasertppayload_class->set_caps = gst_rtp_mp2t_pay_setcaps;
89 gstbasertppayload_class->handle_buffer = gst_rtp_mp2t_pay_handle_buffer;
93 gst_rtp_mp2t_pay_init (GstRTPMP2TPay * rtpmp2tpay, GstRTPMP2TPayClass * klass)
95 GST_BASE_RTP_PAYLOAD (rtpmp2tpay)->clock_rate = 90000;
96 GST_BASE_RTP_PAYLOAD_PT (rtpmp2tpay) = GST_RTP_PAYLOAD_MP2T;
98 rtpmp2tpay->adapter = gst_adapter_new ();
102 gst_rtp_mp2t_pay_finalize (GObject * object)
104 GstRTPMP2TPay *rtpmp2tpay;
106 rtpmp2tpay = GST_RTP_MP2T_PAY (object);
108 g_object_unref (rtpmp2tpay->adapter);
109 rtpmp2tpay->adapter = NULL;
111 G_OBJECT_CLASS (parent_class)->finalize (object);
115 gst_rtp_mp2t_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
118 GstStructure *structure;
120 structure = gst_caps_get_structure (caps, 0);
122 stname = gst_structure_get_name (structure);
124 gst_basertppayload_set_options (payload, "video", TRUE, "MP2T-ES", 90000);
125 gst_basertppayload_set_outcaps (payload, NULL);
131 gst_rtp_mp2t_pay_flush (GstRTPMP2TPay * rtpmp2tpay)
138 avail = gst_adapter_available (rtpmp2tpay->adapter);
139 outbuf = gst_rtp_buffer_new_allocate (avail, 0, 0);
142 payload = gst_rtp_buffer_get_payload (outbuf);
144 /* copy stuff from adapter to payload */
145 gst_adapter_copy (rtpmp2tpay->adapter, payload, 0, avail);
147 GST_BUFFER_TIMESTAMP (outbuf) = rtpmp2tpay->first_ts;
148 GST_BUFFER_DURATION (outbuf) = rtpmp2tpay->duration;
150 GST_DEBUG_OBJECT (rtpmp2tpay, "pushing buffer of size %d",
151 GST_BUFFER_SIZE (outbuf));
153 ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpmp2tpay), outbuf);
155 /* flush the adapter content */
156 gst_adapter_flush (rtpmp2tpay->adapter, avail);
162 gst_rtp_mp2t_pay_handle_buffer (GstBaseRTPPayload * basepayload,
165 GstRTPMP2TPay *rtpmp2tpay;
166 guint size, avail, packet_len;
168 GstClockTime timestamp, duration;
171 rtpmp2tpay = GST_RTP_MP2T_PAY (basepayload);
173 size = GST_BUFFER_SIZE (buffer);
174 data = GST_BUFFER_DATA (buffer);
175 timestamp = GST_BUFFER_TIMESTAMP (buffer);
176 duration = GST_BUFFER_DURATION (buffer);
179 avail = gst_adapter_available (rtpmp2tpay->adapter);
181 /* Initialize new RTP payload */
183 rtpmp2tpay->first_ts = timestamp;
184 rtpmp2tpay->duration = duration;
187 /* get packet length of previous data and this new data,
188 * payload length includes a 4 byte header */
189 packet_len = gst_rtp_buffer_calc_packet_len (4 + avail + size, 0, 0);
191 /* if this buffer is going to overflow the packet, flush what we
193 if (gst_basertppayload_is_filled (basepayload,
194 packet_len, rtpmp2tpay->duration + duration)) {
195 ret = gst_rtp_mp2t_pay_flush (rtpmp2tpay);
196 rtpmp2tpay->first_ts = timestamp;
197 rtpmp2tpay->duration = duration;
199 /* keep filling the payload */
201 if (GST_CLOCK_TIME_IS_VALID (duration))
202 rtpmp2tpay->duration += duration;
205 /* copy buffer to adapter */
206 gst_adapter_push (rtpmp2tpay->adapter, buffer);
213 gst_rtp_mp2t_pay_plugin_init (GstPlugin * plugin)
215 return gst_element_register (plugin, "rtpmp2tpay",
216 GST_RANK_NONE, GST_TYPE_RTP_MP2T_PAY);