2 * Copyright (C) <2005> 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.
24 #include <gst/rtp/gstrtpbuffer.h>
27 #include "gstrtpmp2tdepay.h"
29 /* RtpMP2TDepay signals and args */
36 #define DEFAULT_SKIP_FIRST_BYTES 0
44 static GstStaticPadTemplate gst_rtp_mp2t_depay_src_template =
45 GST_STATIC_PAD_TEMPLATE ("src",
48 GST_STATIC_CAPS ("video/mpegts,"
49 "packetsize=(int)188," "systemstream=(boolean)true")
52 static GstStaticPadTemplate gst_rtp_mp2t_depay_sink_template =
53 GST_STATIC_PAD_TEMPLATE ("sink",
56 GST_STATIC_CAPS ("application/x-rtp, "
57 "media = (string) \"video\", "
58 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
59 "clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP2T\";"
60 /* All optional parameters
62 * "profile-level-id=[1,MAX]"
66 "media = (string) \"video\", "
67 "payload = (int) " GST_RTP_PAYLOAD_MP2T_STRING ", "
68 "clock-rate = (int) [1, MAX ]")
71 G_DEFINE_TYPE (GstRtpMP2TDepay, gst_rtp_mp2t_depay,
72 GST_TYPE_RTP_BASE_DEPAYLOAD);
74 static gboolean gst_rtp_mp2t_depay_setcaps (GstRTPBaseDepayload * depayload,
76 static GstBuffer *gst_rtp_mp2t_depay_process (GstRTPBaseDepayload * depayload,
79 static void gst_rtp_mp2t_depay_set_property (GObject * object, guint prop_id,
80 const GValue * value, GParamSpec * pspec);
81 static void gst_rtp_mp2t_depay_get_property (GObject * object, guint prop_id,
82 GValue * value, GParamSpec * pspec);
85 gst_rtp_mp2t_depay_class_init (GstRtpMP2TDepayClass * klass)
87 GObjectClass *gobject_class;
88 GstElementClass *gstelement_class;
89 GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
91 gobject_class = (GObjectClass *) klass;
92 gstelement_class = (GstElementClass *) klass;
93 gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
95 gstrtpbasedepayload_class->process = gst_rtp_mp2t_depay_process;
96 gstrtpbasedepayload_class->set_caps = gst_rtp_mp2t_depay_setcaps;
98 gobject_class->set_property = gst_rtp_mp2t_depay_set_property;
99 gobject_class->get_property = gst_rtp_mp2t_depay_get_property;
101 gst_element_class_add_pad_template (gstelement_class,
102 gst_static_pad_template_get (&gst_rtp_mp2t_depay_src_template));
103 gst_element_class_add_pad_template (gstelement_class,
104 gst_static_pad_template_get (&gst_rtp_mp2t_depay_sink_template));
106 gst_element_class_set_details_simple (gstelement_class,
107 "RTP MPEG Transport Stream depayloader", "Codec/Depayloader/Network/RTP",
108 "Extracts MPEG2 TS from RTP packets (RFC 2250)",
109 "Wim Taymans <wim.taymans@gmail.com>, "
110 "Thijs Vermeir <thijs.vermeir@barco.com>");
112 g_object_class_install_property (gobject_class, PROP_SKIP_FIRST_BYTES,
113 g_param_spec_uint ("skip-first-bytes",
115 "The amount of bytes that need to be skipped at the beginning of the payload",
116 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
121 gst_rtp_mp2t_depay_init (GstRtpMP2TDepay * rtpmp2tdepay)
123 rtpmp2tdepay->skip_first_bytes = DEFAULT_SKIP_FIRST_BYTES;
127 gst_rtp_mp2t_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
130 GstStructure *structure;
134 structure = gst_caps_get_structure (caps, 0);
135 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
136 clock_rate = 90000; /* default */
137 depayload->clock_rate = clock_rate;
139 srccaps = gst_caps_new_simple ("video/mpegts",
140 "packetsize", G_TYPE_INT, 188,
141 "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
142 res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
143 gst_caps_unref (srccaps);
149 gst_rtp_mp2t_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf)
151 GstRtpMP2TDepay *rtpmp2tdepay;
154 GstRTPBuffer rtp = { NULL };
156 rtpmp2tdepay = GST_RTP_MP2T_DEPAY (depayload);
158 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
159 payload_len = gst_rtp_buffer_get_payload_len (&rtp);
161 if (G_UNLIKELY (payload_len <= rtpmp2tdepay->skip_first_bytes))
164 outbuf = gst_rtp_buffer_get_payload_subbuffer (&rtp,
165 rtpmp2tdepay->skip_first_bytes, -1);
167 gst_rtp_buffer_unmap (&rtp);
170 GST_DEBUG ("gst_rtp_mp2t_depay_chain: pushing buffer of size %"
171 G_GSIZE_FORMAT, gst_buffer_get_size (outbuf));
178 GST_ELEMENT_WARNING (rtpmp2tdepay, STREAM, DECODE,
179 (NULL), ("Packet was empty"));
180 gst_rtp_buffer_unmap (&rtp);
186 gst_rtp_mp2t_depay_set_property (GObject * object, guint prop_id,
187 const GValue * value, GParamSpec * pspec)
189 GstRtpMP2TDepay *rtpmp2tdepay;
191 rtpmp2tdepay = GST_RTP_MP2T_DEPAY (object);
194 case PROP_SKIP_FIRST_BYTES:
195 rtpmp2tdepay->skip_first_bytes = g_value_get_uint (value);
198 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
204 gst_rtp_mp2t_depay_get_property (GObject * object, guint prop_id,
205 GValue * value, GParamSpec * pspec)
207 GstRtpMP2TDepay *rtpmp2tdepay;
209 rtpmp2tdepay = GST_RTP_MP2T_DEPAY (object);
212 case PROP_SKIP_FIRST_BYTES:
213 g_value_set_uint (value, rtpmp2tdepay->skip_first_bytes);
216 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
222 gst_rtp_mp2t_depay_plugin_init (GstPlugin * plugin)
224 return gst_element_register (plugin, "rtpmp2tdepay",
225 GST_RANK_SECONDARY, GST_TYPE_RTP_MP2T_DEPAY);