2 * Copyright (C) <2005> Wim Taymans <wim@fluendo.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
21 #include <gst/rtp/gstrtpbuffer.h>
23 #include "gstrtph263ppay.h"
25 /* elementfactory information */
26 static GstElementDetails gst_rtp_h263ppay_details =
27 GST_ELEMENT_DETAILS ("RTP packet parser",
28 "Codec/Payloader/Network",
29 "Payload-encodes H263+ video in RTP packets (RFC 2429)",
30 "Wim Taymans <wim@fluendo.com>");
32 static GstStaticPadTemplate gst_rtp_h263p_pay_sink_template =
33 GST_STATIC_PAD_TEMPLATE ("sink",
36 GST_STATIC_CAPS ("video/x-h263")
39 static GstStaticPadTemplate gst_rtp_h263p_pay_src_template =
40 GST_STATIC_PAD_TEMPLATE ("src",
43 GST_STATIC_CAPS ("application/x-rtp, "
44 "media = (string) \"video\", "
45 "payload = (int) [ 96, 127 ], "
46 "clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"")
49 static void gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass);
50 static void gst_rtp_h263p_pay_base_init (GstRtpH263PPayClass * klass);
51 static void gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay);
52 static void gst_rtp_h263p_pay_finalize (GObject * object);
54 static gboolean gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload,
56 static GstFlowReturn gst_rtp_h263p_pay_handle_buffer (GstBaseRTPPayload *
57 payload, GstBuffer * buffer);
59 static GstBaseRTPPayloadClass *parent_class = NULL;
62 gst_rtp_h263p_pay_get_type (void)
64 static GType rtph263ppay_type = 0;
66 if (!rtph263ppay_type) {
67 static const GTypeInfo rtph263ppay_info = {
68 sizeof (GstRtpH263PPayClass),
69 (GBaseInitFunc) gst_rtp_h263p_pay_base_init,
71 (GClassInitFunc) gst_rtp_h263p_pay_class_init,
74 sizeof (GstRtpH263PPay),
76 (GInstanceInitFunc) gst_rtp_h263p_pay_init,
80 g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpH263PPay",
81 &rtph263ppay_info, 0);
83 return rtph263ppay_type;
87 gst_rtp_h263p_pay_base_init (GstRtpH263PPayClass * klass)
89 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
91 gst_element_class_add_pad_template (element_class,
92 gst_static_pad_template_get (&gst_rtp_h263p_pay_src_template));
93 gst_element_class_add_pad_template (element_class,
94 gst_static_pad_template_get (&gst_rtp_h263p_pay_sink_template));
96 gst_element_class_set_details (element_class, &gst_rtp_h263ppay_details);
100 gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass)
102 GObjectClass *gobject_class;
103 GstElementClass *gstelement_class;
104 GstBaseRTPPayloadClass *gstbasertppayload_class;
106 gobject_class = (GObjectClass *) klass;
107 gstelement_class = (GstElementClass *) klass;
108 gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
110 parent_class = g_type_class_peek_parent (klass);
112 gobject_class->finalize = gst_rtp_h263p_pay_finalize;
114 gstbasertppayload_class->set_caps = gst_rtp_h263p_pay_setcaps;
115 gstbasertppayload_class->handle_buffer = gst_rtp_h263p_pay_handle_buffer;
119 gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay)
121 rtph263ppay->adapter = gst_adapter_new ();
125 gst_rtp_h263p_pay_finalize (GObject * object)
127 GstRtpH263PPay *rtph263ppay;
129 rtph263ppay = GST_RTP_H263P_PAY (object);
131 g_object_unref (rtph263ppay->adapter);
132 rtph263ppay->adapter = NULL;
134 G_OBJECT_CLASS (parent_class)->finalize (object);
138 gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
140 gst_basertppayload_set_options (payload, "video", TRUE, "H263-1998", 90000);
141 gst_basertppayload_set_outcaps (payload, NULL);
148 gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
155 avail = gst_adapter_available (rtph263ppay->adapter);
168 /* FIXME, do better mtu packing, header len etc should be
169 * included in this calculation. */
170 towrite = MIN (avail, GST_BASE_RTP_PAYLOAD_MTU (rtph263ppay));
171 /* for fragmented frames we need 2 bytes header, for other
172 * frames we must reuse the first 2 bytes of the data as the
174 header_len = (fragmented ? 2 : 0);
175 payload_len = header_len + towrite;
177 outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
178 /* last fragment gets the marker bit set */
179 gst_rtp_buffer_set_marker (outbuf, avail > towrite ? 0 : 1);
181 payload = gst_rtp_buffer_get_payload (outbuf);
183 data = (guint8 *) gst_adapter_peek (rtph263ppay->adapter, towrite);
184 memcpy (&payload[header_len], data, towrite);
187 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
188 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
189 * | RR |P|V| PLEN |PEBIT|
190 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
192 payload[0] = fragmented ? 0x00 : 0x04;
195 GST_BUFFER_TIMESTAMP (outbuf) = rtph263ppay->first_ts;
196 gst_adapter_flush (rtph263ppay->adapter, towrite);
198 ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtph263ppay), outbuf);
208 gst_rtp_h263p_pay_handle_buffer (GstBaseRTPPayload * payload,
211 GstRtpH263PPay *rtph263ppay;
215 rtph263ppay = GST_RTP_H263P_PAY (payload);
217 size = GST_BUFFER_SIZE (buffer);
218 rtph263ppay->first_ts = GST_BUFFER_TIMESTAMP (buffer);
220 /* we always encode and flush a full picture */
221 gst_adapter_push (rtph263ppay->adapter, buffer);
222 ret = gst_rtp_h263p_pay_flush (rtph263ppay);
228 gst_rtp_h263p_pay_plugin_init (GstPlugin * plugin)
230 return gst_element_register (plugin, "rtph263ppay",
231 GST_RANK_NONE, GST_TYPE_RTP_H263P_PAY);