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.
26 #include <gst/rtp/gstrtpbuffer.h>
28 #include "gstrtph263ppay.h"
30 #define DEFAULT_FRAGMENTATION_MODE GST_FRAGMENTATION_MODE_NORMAL
35 PROP_FRAGMENTATION_MODE
38 #define GST_TYPE_FRAGMENTATION_MODE (gst_fragmentation_mode_get_type())
40 gst_fragmentation_mode_get_type (void)
42 static GType fragmentation_mode_type = 0;
43 static const GEnumValue fragmentation_mode[] = {
44 {GST_FRAGMENTATION_MODE_NORMAL, "Normal", "normal"},
45 {GST_FRAGMENTATION_MODE_SYNC, "Fragment at sync points", "sync"},
49 if (!fragmentation_mode_type) {
50 fragmentation_mode_type =
51 g_enum_register_static ("GstFragmentationMode", fragmentation_mode);
53 return fragmentation_mode_type;
57 GST_DEBUG_CATEGORY_STATIC (rtph263ppay_debug);
58 #define GST_CAT_DEFAULT rtph263ppay_debug
60 /* elementfactory information */
61 static const GstElementDetails gst_rtp_h263ppay_details =
62 GST_ELEMENT_DETAILS ("RTP H263 payloader",
63 "Codec/Payloader/Network",
64 "Payload-encodes H263/+/++ video in RTP packets (RFC 4629)",
65 "Wim Taymans <wim.taymans@gmail.com>");
67 static GstStaticPadTemplate gst_rtp_h263p_pay_sink_template =
68 GST_STATIC_PAD_TEMPLATE ("sink",
71 GST_STATIC_CAPS ("video/x-h263, " "variant = (string) \"itu\" ")
74 static GstStaticPadTemplate gst_rtp_h263p_pay_src_template =
75 GST_STATIC_PAD_TEMPLATE ("src",
78 GST_STATIC_CAPS ("application/x-rtp, "
79 "media = (string) \"video\", "
80 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
81 "clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"; "
83 "media = (string) \"video\", "
84 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
85 "clock-rate = (int) 90000, " "encoding-name = (string) \"H263-2000\"")
88 static void gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass);
89 static void gst_rtp_h263p_pay_base_init (GstRtpH263PPayClass * klass);
90 static void gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay);
91 static void gst_rtp_h263p_pay_finalize (GObject * object);
93 static void gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
94 const GValue * value, GParamSpec * pspec);
95 static void gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
96 GValue * value, GParamSpec * pspec);
98 static gboolean gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload,
100 static GstFlowReturn gst_rtp_h263p_pay_handle_buffer (GstBaseRTPPayload *
101 payload, GstBuffer * buffer);
103 static GstBaseRTPPayloadClass *parent_class = NULL;
106 gst_rtp_h263p_pay_get_type (void)
108 static GType rtph263ppay_type = 0;
110 if (!rtph263ppay_type) {
111 static const GTypeInfo rtph263ppay_info = {
112 sizeof (GstRtpH263PPayClass),
113 (GBaseInitFunc) gst_rtp_h263p_pay_base_init,
115 (GClassInitFunc) gst_rtp_h263p_pay_class_init,
118 sizeof (GstRtpH263PPay),
120 (GInstanceInitFunc) gst_rtp_h263p_pay_init,
124 g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpH263PPay",
125 &rtph263ppay_info, 0);
127 return rtph263ppay_type;
131 gst_rtp_h263p_pay_base_init (GstRtpH263PPayClass * klass)
133 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
135 gst_element_class_add_pad_template (element_class,
136 gst_static_pad_template_get (&gst_rtp_h263p_pay_src_template));
137 gst_element_class_add_pad_template (element_class,
138 gst_static_pad_template_get (&gst_rtp_h263p_pay_sink_template));
140 gst_element_class_set_details (element_class, &gst_rtp_h263ppay_details);
144 gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass)
146 GObjectClass *gobject_class;
147 GstElementClass *gstelement_class;
148 GstBaseRTPPayloadClass *gstbasertppayload_class;
150 gobject_class = (GObjectClass *) klass;
151 gstelement_class = (GstElementClass *) klass;
152 gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
154 parent_class = g_type_class_peek_parent (klass);
156 gobject_class->finalize = gst_rtp_h263p_pay_finalize;
157 gobject_class->set_property = gst_rtp_h263p_pay_set_property;
158 gobject_class->get_property = gst_rtp_h263p_pay_get_property;
160 gstbasertppayload_class->set_caps = gst_rtp_h263p_pay_setcaps;
161 gstbasertppayload_class->handle_buffer = gst_rtp_h263p_pay_handle_buffer;
163 g_object_class_install_property (G_OBJECT_CLASS (klass),
164 PROP_FRAGMENTATION_MODE, g_param_spec_enum ("fragmentation-mode",
165 "Fragmentation Mode",
166 "Packet Fragmentation Mode", GST_TYPE_FRAGMENTATION_MODE,
167 DEFAULT_FRAGMENTATION_MODE, G_PARAM_READWRITE));
169 GST_DEBUG_CATEGORY_INIT (rtph263ppay_debug, "rtph263ppay",
170 0, "rtph263ppay (RFC 4629)");
174 gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay)
176 rtph263ppay->adapter = gst_adapter_new ();
178 rtph263ppay->fragmentation_mode = DEFAULT_FRAGMENTATION_MODE;
182 gst_rtp_h263p_pay_finalize (GObject * object)
184 GstRtpH263PPay *rtph263ppay;
186 rtph263ppay = GST_RTP_H263P_PAY (object);
188 g_object_unref (rtph263ppay->adapter);
189 rtph263ppay->adapter = NULL;
191 G_OBJECT_CLASS (parent_class)->finalize (object);
195 gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
199 gst_basertppayload_set_options (payload, "video", TRUE, "H263-1998", 90000);
200 res = gst_basertppayload_set_outcaps (payload, NULL);
206 gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
207 const GValue * value, GParamSpec * pspec)
209 GstRtpH263PPay *rtph263ppay;
211 rtph263ppay = GST_RTP_H263P_PAY (object);
214 case PROP_FRAGMENTATION_MODE:
215 rtph263ppay->fragmentation_mode = g_value_get_enum (value);
218 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
224 gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
225 GValue * value, GParamSpec * pspec)
227 GstRtpH263PPay *rtph263ppay;
229 rtph263ppay = GST_RTP_H263P_PAY (object);
232 case PROP_FRAGMENTATION_MODE:
233 g_value_set_enum (value, rtph263ppay->fragmentation_mode);
236 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
242 gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
249 avail = gst_adapter_available (rtph263ppay->adapter);
254 /* This algorithm assumes the H263/+/++ encoder sends complete frames in each
256 /* With Fragmentation Mode at GST_FRAGMENTATION_MODE_NORMAL:
257 * This algorithm implements the Follow-on packets method for packetization.
258 * This assumes low packet loss network.
259 * With Fragmentation Mode at GST_FRAGMENTATION_MODE_SYNC:
260 * This algorithm separates large frames at synchronisation points (Segments)
261 * (See RFC 4629 section 6). It would be interesting to have a property such as network
262 * quality to select between both packetization methods */
263 /* TODO Add VRC supprt (See RFC 4629 section 5.2) */
272 gboolean found_gob = FALSE;
274 if (rtph263ppay->fragmentation_mode == GST_FRAGMENTATION_MODE_SYNC) {
275 /* start after 1st gop possible */
276 guint parsed_len = 3;
277 const guint8 *parse_data = NULL;
279 parse_data = gst_adapter_peek (rtph263ppay->adapter, avail);
281 /* Check if we have a gob or eos , eossbs */
282 /* FIXME EOS and EOSSBS packets should never contain any gobs and vice-versa */
283 if (avail >= 3 && *parse_data == 0 && *(parse_data + 1) == 0
284 && *(parse_data + 2) >= 0x80) {
285 GST_DEBUG_OBJECT (rtph263ppay, " Found GOB header");
288 /* Find next and cut the packet accordingly */
289 /* TODO we should get as many gobs as possible until MTU is reached, this
290 * code seems to just get one GOB per packet */
291 while (parsed_len + 2 < avail) {
292 if (parse_data[parsed_len] == 0 && parse_data[parsed_len + 1] == 0
293 && parse_data[parsed_len + 2] >= 0x80) {
294 next_gop = parsed_len;
295 GST_DEBUG_OBJECT (rtph263ppay, " Next GOB Detected at : %d",
303 /* for picture start frames (non-fragmented), we need to remove the first
304 * two 0x00 bytes and set P=1 */
305 header_len = (fragmented && !found_gob) ? 2 : 0;
307 towrite = MIN (avail, gst_rtp_buffer_calc_payload_len
308 (GST_BASE_RTP_PAYLOAD_MTU (rtph263ppay) - header_len, 0, 0));
311 towrite = MIN (next_gop, towrite);
313 payload_len = header_len + towrite;
315 outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
316 /* last fragment gets the marker bit set */
317 gst_rtp_buffer_set_marker (outbuf, avail > towrite ? 0 : 1);
319 payload = gst_rtp_buffer_get_payload (outbuf);
321 data = (guint8 *) gst_adapter_peek (rtph263ppay->adapter, towrite);
322 memcpy (&payload[header_len], data, towrite);
325 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
326 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
327 * | RR |P|V| PLEN |PEBIT|
328 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
330 /* if fragmented or gop header , write p bit =1 */
331 payload[0] = (fragmented && !found_gob) ? 0x00 : 0x04;
334 GST_BUFFER_TIMESTAMP (outbuf) = rtph263ppay->first_timestamp;
335 GST_BUFFER_DURATION (outbuf) = rtph263ppay->first_duration;
337 gst_adapter_flush (rtph263ppay->adapter, towrite);
339 ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtph263ppay), outbuf);
349 gst_rtp_h263p_pay_handle_buffer (GstBaseRTPPayload * payload,
352 GstRtpH263PPay *rtph263ppay;
356 rtph263ppay = GST_RTP_H263P_PAY (payload);
358 size = GST_BUFFER_SIZE (buffer);
359 rtph263ppay->first_timestamp = GST_BUFFER_TIMESTAMP (buffer);
360 rtph263ppay->first_duration = GST_BUFFER_DURATION (buffer);
362 /* we always encode and flush a full picture */
363 gst_adapter_push (rtph263ppay->adapter, buffer);
364 ret = gst_rtp_h263p_pay_flush (rtph263ppay);
370 gst_rtp_h263p_pay_plugin_init (GstPlugin * plugin)
372 return gst_element_register (plugin, "rtph263ppay",
373 GST_RANK_NONE, GST_TYPE_RTP_H263P_PAY);