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., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
28 #include <gst/rtp/gstrtpbuffer.h>
29 #include <gst/video/video.h>
31 #include "gstrtph263ppay.h"
32 #include "gstrtputils.h"
34 #define DEFAULT_FRAGMENTATION_MODE GST_FRAGMENTATION_MODE_NORMAL
39 PROP_FRAGMENTATION_MODE
42 #define GST_TYPE_FRAGMENTATION_MODE (gst_fragmentation_mode_get_type())
44 gst_fragmentation_mode_get_type (void)
46 static GType fragmentation_mode_type = 0;
47 static const GEnumValue fragmentation_mode[] = {
48 {GST_FRAGMENTATION_MODE_NORMAL, "Normal", "normal"},
49 {GST_FRAGMENTATION_MODE_SYNC, "Fragment at sync points", "sync"},
53 if (!fragmentation_mode_type) {
54 fragmentation_mode_type =
55 g_enum_register_static ("GstFragmentationMode", fragmentation_mode);
57 return fragmentation_mode_type;
61 GST_DEBUG_CATEGORY_STATIC (rtph263ppay_debug);
62 #define GST_CAT_DEFAULT rtph263ppay_debug
64 static GstStaticPadTemplate gst_rtp_h263p_pay_sink_template =
65 GST_STATIC_PAD_TEMPLATE ("sink",
68 GST_STATIC_CAPS ("video/x-h263, variant = (string) itu")
72 * We also return these in getcaps() as required by the SDP caps
74 * width = (int) [16, 4096]
75 * height = (int) [16, 4096]
76 * "annex-f = (boolean) {true, false},"
77 * "annex-i = (boolean) {true, false},"
78 * "annex-j = (boolean) {true, false},"
79 * "annex-l = (boolean) {true, false},"
80 * "annex-t = (boolean) {true, false},"
81 * "annex-v = (boolean) {true, false}")
85 static GstStaticPadTemplate gst_rtp_h263p_pay_src_template =
86 GST_STATIC_PAD_TEMPLATE ("src",
89 GST_STATIC_CAPS ("application/x-rtp, "
90 "media = (string) \"video\", "
91 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
92 "clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"; "
94 "media = (string) \"video\", "
95 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
96 "clock-rate = (int) 90000, " "encoding-name = (string) \"H263-2000\"")
99 static void gst_rtp_h263p_pay_finalize (GObject * object);
101 static void gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
102 const GValue * value, GParamSpec * pspec);
103 static void gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
104 GValue * value, GParamSpec * pspec);
106 static gboolean gst_rtp_h263p_pay_setcaps (GstRTPBasePayload * payload,
108 static GstCaps *gst_rtp_h263p_pay_sink_getcaps (GstRTPBasePayload * payload,
109 GstPad * pad, GstCaps * filter);
110 static GstFlowReturn gst_rtp_h263p_pay_handle_buffer (GstRTPBasePayload *
111 payload, GstBuffer * buffer);
113 #define gst_rtp_h263p_pay_parent_class parent_class
114 G_DEFINE_TYPE (GstRtpH263PPay, gst_rtp_h263p_pay, GST_TYPE_RTP_BASE_PAYLOAD);
117 gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass)
119 GObjectClass *gobject_class;
120 GstElementClass *gstelement_class;
121 GstRTPBasePayloadClass *gstrtpbasepayload_class;
123 gobject_class = (GObjectClass *) klass;
124 gstelement_class = (GstElementClass *) klass;
125 gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
127 gobject_class->finalize = gst_rtp_h263p_pay_finalize;
128 gobject_class->set_property = gst_rtp_h263p_pay_set_property;
129 gobject_class->get_property = gst_rtp_h263p_pay_get_property;
131 gstrtpbasepayload_class->set_caps = gst_rtp_h263p_pay_setcaps;
132 gstrtpbasepayload_class->get_caps = gst_rtp_h263p_pay_sink_getcaps;
133 gstrtpbasepayload_class->handle_buffer = gst_rtp_h263p_pay_handle_buffer;
135 g_object_class_install_property (G_OBJECT_CLASS (klass),
136 PROP_FRAGMENTATION_MODE, g_param_spec_enum ("fragmentation-mode",
137 "Fragmentation Mode",
138 "Packet Fragmentation Mode", GST_TYPE_FRAGMENTATION_MODE,
139 DEFAULT_FRAGMENTATION_MODE,
140 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
142 gst_element_class_add_static_pad_template (gstelement_class,
143 &gst_rtp_h263p_pay_src_template);
144 gst_element_class_add_static_pad_template (gstelement_class,
145 &gst_rtp_h263p_pay_sink_template);
147 gst_element_class_set_static_metadata (gstelement_class, "RTP H263 payloader",
148 "Codec/Payloader/Network/RTP",
149 "Payload-encodes H263/+/++ video in RTP packets (RFC 4629)",
150 "Wim Taymans <wim.taymans@gmail.com>");
152 GST_DEBUG_CATEGORY_INIT (rtph263ppay_debug, "rtph263ppay",
153 0, "rtph263ppay (RFC 4629)");
157 gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay)
159 rtph263ppay->adapter = gst_adapter_new ();
161 rtph263ppay->fragmentation_mode = DEFAULT_FRAGMENTATION_MODE;
165 gst_rtp_h263p_pay_finalize (GObject * object)
167 GstRtpH263PPay *rtph263ppay;
169 rtph263ppay = GST_RTP_H263P_PAY (object);
171 g_object_unref (rtph263ppay->adapter);
172 rtph263ppay->adapter = NULL;
174 G_OBJECT_CLASS (parent_class)->finalize (object);
178 gst_rtp_h263p_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
182 gchar *encoding_name = NULL;
184 g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
187 gst_pad_peer_query_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload), NULL);
190 gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
191 GstCaps *intersect = gst_caps_intersect (peercaps, tcaps);
192 gst_caps_unref (tcaps);
194 gst_caps_unref (peercaps);
195 if (!gst_caps_is_empty (intersect)) {
196 GstStructure *s = gst_caps_get_structure (intersect, 0);
197 encoding_name = g_strdup (gst_structure_get_string (s, "encoding-name"));
199 gst_caps_unref (intersect);
203 encoding_name = g_strdup ("H263-1998");
205 gst_rtp_base_payload_set_options (payload, "video", TRUE,
206 (gchar *) encoding_name, 90000);
207 res = gst_rtp_base_payload_set_outcaps (payload, NULL);
208 g_free (encoding_name);
214 caps_append (GstCaps * caps, GstStructure * in_s, guint x, guint y, guint mpi)
221 if (mpi < 1 || mpi > 32)
224 s = gst_structure_copy (in_s);
226 gst_structure_set (s,
227 "width", GST_TYPE_INT_RANGE, 1, x,
228 "height", GST_TYPE_INT_RANGE, 1, y,
229 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 1001 * mpi, NULL);
231 caps = gst_caps_merge_structure (caps, s);
238 gst_rtp_h263p_pay_sink_getcaps (GstRTPBasePayload * payload, GstPad * pad,
241 GstRtpH263PPay *rtph263ppay;
242 GstCaps *caps = NULL, *templ;
243 GstCaps *peercaps = NULL;
244 GstCaps *intersect = NULL;
247 rtph263ppay = GST_RTP_H263P_PAY (payload);
250 gst_pad_peer_query_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload), NULL);
252 /* if we're just outputting to udpsink or fakesink or so, we should also
253 * accept any input compatible with our sink template caps */
254 if (!peercaps || gst_caps_is_any (peercaps)) {
256 gst_caps_unref (peercaps);
258 gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SINKPAD (payload));
262 /* We basically need to differentiate two use-cases here: One where there's
263 * a capsfilter after the payloader with caps created from an SDP; in this
264 * case the filter caps are fixed and we want to signal to an encoder what
265 * we want it to produce. The second case is simply payloader ! depayloader
266 * where we are dealing with the depayloader's template caps. In this case
267 * we should accept any input compatible with our sink template caps. */
268 if (!gst_caps_is_fixed (peercaps)) {
270 gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SINKPAD (payload));
274 templ = gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
275 intersect = gst_caps_intersect (peercaps, templ);
276 gst_caps_unref (peercaps);
277 gst_caps_unref (templ);
279 if (gst_caps_is_empty (intersect))
282 caps = gst_caps_new_empty ();
283 for (i = 0; i < gst_caps_get_size (intersect); i++) {
284 GstStructure *s = gst_caps_get_structure (intersect, i);
285 const gchar *encoding_name = gst_structure_get_string (s, "encoding-name");
287 if (!strcmp (encoding_name, "H263-2000")) {
288 const gchar *profile_str = gst_structure_get_string (s, "profile");
289 const gchar *level_str = gst_structure_get_string (s, "level");
293 if (profile_str && level_str) {
294 gboolean i = FALSE, j = FALSE, l = FALSE, t = FALSE, f = FALSE,
296 GstStructure *new_s = gst_structure_new ("video/x-h263",
297 "variant", G_TYPE_STRING, "itu",
300 profile = atoi (profile_str);
301 level = atoi (level_str);
303 /* These profiles are defined in the H.263 Annex X */
306 /* The Baseline Profile (Profile 0) */
309 /* H.320 Coding Efficiency Version 2 Backward-Compatibility Profile
311 * Baseline + Annexes I, J, L.4 and T
313 i = j = l = t = TRUE;
316 /* Version 1 Backward-Compatibility Profile (Profile 2)
319 i = j = l = t = f = TRUE;
322 /* Version 2 Interactive and Streaming Wireless Profile
323 * Baseline + Annexes I, J, T
328 /* Version 3 Interactive and Streaming Wireless Profile (Profile 4)
329 * Baseline + Annexes I, J, T, V, W.6.3.8,
331 /* Missing W.6.3.8 */
332 i = j = t = v = TRUE;
335 /* Conversational High Compression Profile (Profile 5)
336 * Baseline + Annexes F, I, J, L.4, T, D, U
339 f = i = j = l = t = TRUE;
342 /* Conversational Internet Profile (Profile 6)
343 * Baseline + Annexes F, I, J, L.4, T, D, U and
344 * K with arbitratry slice ordering
346 /* Missing D, U, K with arbitratry slice ordering */
347 f = i = j = l = t = TRUE;
350 /* Conversational Interlace Profile (Profile 7)
351 * Baseline + Annexes F, I, J, L.4, T, D, U, W.6.3.11
353 /* Missing D, U, W.6.3.11 */
354 f = i = j = l = t = TRUE;
357 /* High Latency Profile (Profile 8)
358 * Baseline + Annexes F, I, J, L.4, T, D, U, P.5, O.1.1 and
359 * K with arbitratry slice ordering
361 /* Missing D, U, P.5, O.1.1 */
362 f = i = j = l = t = TRUE;
367 if (f || i || j || t || l || v) {
371 g_value_init (&list, GST_TYPE_LIST);
372 g_value_init (&vstr, G_TYPE_STRING);
374 g_value_set_static_string (&vstr, "h263");
375 gst_value_list_append_value (&list, &vstr);
376 g_value_set_static_string (&vstr, "h263p");
377 gst_value_list_append_value (&list, &vstr);
380 g_value_set_static_string (&vstr, "h263pp");
381 gst_value_list_append_value (&list, &vstr);
383 g_value_unset (&vstr);
385 gst_structure_set_value (new_s, "h263version", &list);
386 g_value_unset (&list);
388 gst_structure_set (new_s, "h263version", G_TYPE_STRING, "h263", NULL);
393 gst_structure_set (new_s, "annex-f", G_TYPE_BOOLEAN, FALSE, NULL);
395 gst_structure_set (new_s, "annex-i", G_TYPE_BOOLEAN, FALSE, NULL);
397 gst_structure_set (new_s, "annex-j", G_TYPE_BOOLEAN, FALSE, NULL);
399 gst_structure_set (new_s, "annex-t", G_TYPE_BOOLEAN, FALSE, NULL);
401 gst_structure_set (new_s, "annex-l", G_TYPE_BOOLEAN, FALSE, NULL);
403 gst_structure_set (new_s, "annex-v", G_TYPE_BOOLEAN, FALSE, NULL);
406 if (level <= 10 || level == 45) {
407 gst_structure_set (new_s,
408 "width", GST_TYPE_INT_RANGE, 1, 176,
409 "height", GST_TYPE_INT_RANGE, 1, 144,
410 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 2002, NULL);
411 caps = gst_caps_merge_structure (caps, new_s);
412 } else if (level <= 20) {
413 GstStructure *s_copy = gst_structure_copy (new_s);
415 gst_structure_set (new_s,
416 "width", GST_TYPE_INT_RANGE, 1, 352,
417 "height", GST_TYPE_INT_RANGE, 1, 288,
418 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 2002, NULL);
419 caps = gst_caps_merge_structure (caps, new_s);
421 gst_structure_set (s_copy,
422 "width", GST_TYPE_INT_RANGE, 1, 176,
423 "height", GST_TYPE_INT_RANGE, 1, 144,
424 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 1001, NULL);
425 caps = gst_caps_merge_structure (caps, s_copy);
426 } else if (level <= 40) {
428 gst_structure_set (new_s,
429 "width", GST_TYPE_INT_RANGE, 1, 352,
430 "height", GST_TYPE_INT_RANGE, 1, 288,
431 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 1001, NULL);
432 caps = gst_caps_merge_structure (caps, new_s);
433 } else if (level <= 50) {
434 GstStructure *s_copy = gst_structure_copy (new_s);
436 gst_structure_set (new_s,
437 "width", GST_TYPE_INT_RANGE, 1, 352,
438 "height", GST_TYPE_INT_RANGE, 1, 288,
439 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
440 caps = gst_caps_merge_structure (caps, new_s);
442 gst_structure_set (s_copy,
443 "width", GST_TYPE_INT_RANGE, 1, 352,
444 "height", GST_TYPE_INT_RANGE, 1, 240,
445 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
446 caps = gst_caps_merge_structure (caps, s_copy);
447 } else if (level <= 60) {
448 GstStructure *s_copy = gst_structure_copy (new_s);
450 gst_structure_set (new_s,
451 "width", GST_TYPE_INT_RANGE, 1, 720,
452 "height", GST_TYPE_INT_RANGE, 1, 288,
453 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
454 caps = gst_caps_merge_structure (caps, new_s);
456 gst_structure_set (s_copy,
457 "width", GST_TYPE_INT_RANGE, 1, 720,
458 "height", GST_TYPE_INT_RANGE, 1, 240,
459 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
460 caps = gst_caps_merge_structure (caps, s_copy);
461 } else if (level <= 70) {
462 GstStructure *s_copy = gst_structure_copy (new_s);
464 gst_structure_set (new_s,
465 "width", GST_TYPE_INT_RANGE, 1, 720,
466 "height", GST_TYPE_INT_RANGE, 1, 576,
467 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
468 caps = gst_caps_merge_structure (caps, new_s);
470 gst_structure_set (s_copy,
471 "width", GST_TYPE_INT_RANGE, 1, 720,
472 "height", GST_TYPE_INT_RANGE, 1, 480,
473 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
474 caps = gst_caps_merge_structure (caps, s_copy);
476 caps = gst_caps_merge_structure (caps, new_s);
480 GstStructure *new_s = gst_structure_new ("video/x-h263",
481 "variant", G_TYPE_STRING, "itu",
482 "h263version", G_TYPE_STRING, "h263",
485 GST_DEBUG_OBJECT (rtph263ppay, "No profile or level specified"
486 " for H263-2000, defaulting to baseline H263");
488 caps = gst_caps_merge_structure (caps, new_s);
491 gboolean f = FALSE, i = FALSE, j = FALSE, t = FALSE;
492 /* FIXME: ffmpeg support the Appendix K too, how do we express it ?
496 GstStructure *new_s = gst_structure_new ("video/x-h263",
497 "variant", G_TYPE_STRING, "itu",
499 gboolean added = FALSE;
501 str = gst_structure_get_string (s, "f");
502 if (str && !strcmp (str, "1"))
505 str = gst_structure_get_string (s, "i");
506 if (str && !strcmp (str, "1"))
509 str = gst_structure_get_string (s, "j");
510 if (str && !strcmp (str, "1"))
513 str = gst_structure_get_string (s, "t");
514 if (str && !strcmp (str, "1"))
517 if (f || i || j || t) {
521 g_value_init (&list, GST_TYPE_LIST);
522 g_value_init (&vstr, G_TYPE_STRING);
524 g_value_set_static_string (&vstr, "h263");
525 gst_value_list_append_value (&list, &vstr);
526 g_value_set_static_string (&vstr, "h263p");
527 gst_value_list_append_value (&list, &vstr);
528 g_value_unset (&vstr);
530 gst_structure_set_value (new_s, "h263version", &list);
531 g_value_unset (&list);
533 gst_structure_set (new_s, "h263version", G_TYPE_STRING, "h263", NULL);
537 gst_structure_set (new_s, "annex-f", G_TYPE_BOOLEAN, FALSE, NULL);
539 gst_structure_set (new_s, "annex-i", G_TYPE_BOOLEAN, FALSE, NULL);
541 gst_structure_set (new_s, "annex-j", G_TYPE_BOOLEAN, FALSE, NULL);
543 gst_structure_set (new_s, "annex-t", G_TYPE_BOOLEAN, FALSE, NULL);
546 str = gst_structure_get_string (s, "custom");
548 unsigned int xmax, ymax, mpi;
549 if (sscanf (str, "%u,%u,%u", &xmax, &ymax, &mpi) == 3) {
550 if (xmax % 4 && ymax % 4 && mpi >= 1 && mpi <= 32) {
551 caps = caps_append (caps, new_s, xmax, ymax, mpi);
554 GST_WARNING_OBJECT (rtph263ppay, "Invalid custom framesize/MPI"
555 " %u x %u at %u, ignoring", xmax, ymax, mpi);
558 GST_WARNING_OBJECT (rtph263ppay, "Invalid custom framesize/MPI: %s,"
563 str = gst_structure_get_string (s, "16cif");
565 int mpi = atoi (str);
566 caps = caps_append (caps, new_s, 1408, 1152, mpi);
570 str = gst_structure_get_string (s, "4cif");
572 int mpi = atoi (str);
573 caps = caps_append (caps, new_s, 704, 576, mpi);
577 str = gst_structure_get_string (s, "cif");
579 int mpi = atoi (str);
580 caps = caps_append (caps, new_s, 352, 288, mpi);
584 str = gst_structure_get_string (s, "qcif");
586 int mpi = atoi (str);
587 caps = caps_append (caps, new_s, 176, 144, mpi);
591 str = gst_structure_get_string (s, "sqcif");
593 int mpi = atoi (str);
594 caps = caps_append (caps, new_s, 128, 96, mpi);
599 gst_structure_free (new_s);
601 caps = gst_caps_merge_structure (caps, new_s);
605 gst_caps_unref (intersect);
612 GST_DEBUG_OBJECT (payload, "Intersect %" GST_PTR_FORMAT " and filter %"
613 GST_PTR_FORMAT, caps, filter);
614 tmp = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
615 gst_caps_unref (caps);
624 gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
625 const GValue * value, GParamSpec * pspec)
627 GstRtpH263PPay *rtph263ppay;
629 rtph263ppay = GST_RTP_H263P_PAY (object);
632 case PROP_FRAGMENTATION_MODE:
633 rtph263ppay->fragmentation_mode = g_value_get_enum (value);
636 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
642 gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
643 GValue * value, GParamSpec * pspec)
645 GstRtpH263PPay *rtph263ppay;
647 rtph263ppay = GST_RTP_H263P_PAY (object);
650 case PROP_FRAGMENTATION_MODE:
651 g_value_set_enum (value, rtph263ppay->fragmentation_mode);
654 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
660 gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
663 GstBufferList *list = NULL;
664 GstBuffer *outbuf = NULL;
666 gboolean fragmented = FALSE;
668 avail = gst_adapter_available (rtph263ppay->adapter);
673 /* This algorithm assumes the H263/+/++ encoder sends complete frames in each
675 /* With Fragmentation Mode at GST_FRAGMENTATION_MODE_NORMAL:
676 * This algorithm implements the Follow-on packets method for packetization.
677 * This assumes low packet loss network.
678 * With Fragmentation Mode at GST_FRAGMENTATION_MODE_SYNC:
679 * This algorithm separates large frames at synchronisation points (Segments)
680 * (See RFC 4629 section 6). It would be interesting to have a property such as network
681 * quality to select between both packetization methods */
682 /* TODO Add VRC supprt (See RFC 4629 section 5.2) */
689 gboolean found_gob = FALSE;
690 GstRTPBuffer rtp = { NULL };
691 GstBuffer *payload_buf;
693 if (rtph263ppay->fragmentation_mode == GST_FRAGMENTATION_MODE_SYNC) {
694 /* start after 1st gop possible */
696 /* Check if we have a gob or eos , eossbs */
697 /* FIXME EOS and EOSSBS packets should never contain any gobs and vice-versa */
699 gst_adapter_masked_scan_uint32 (rtph263ppay->adapter, 0xffff8000,
700 0x00008000, 0, avail);
702 GST_DEBUG_OBJECT (rtph263ppay, " Found GOB header");
706 /* Find next and cut the packet accordingly */
707 /* TODO we should get as many gobs as possible until MTU is reached, this
708 * code seems to just get one GOB per packet */
709 if (next_gop == 0 && avail > 3)
711 gst_adapter_masked_scan_uint32 (rtph263ppay->adapter, 0xffff8000,
712 0x00008000, 3, avail - 3);
713 GST_DEBUG_OBJECT (rtph263ppay, " Next GOB Detected at : %d", next_gop);
718 /* for picture start frames (non-fragmented), we need to remove the first
719 * two 0x00 bytes and set P=1 */
720 if (!fragmented || found_gob) {
721 gst_adapter_flush (rtph263ppay->adapter, 2);
726 towrite = MIN (avail, gst_rtp_buffer_calc_payload_len
727 (GST_RTP_BASE_PAYLOAD_MTU (rtph263ppay) - header_len, 0, 0));
730 towrite = MIN (next_gop, towrite);
732 outbuf = gst_rtp_buffer_new_allocate (header_len, 0, 0);
734 gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
735 /* last fragment gets the marker bit set */
736 gst_rtp_buffer_set_marker (&rtp, avail > towrite ? 0 : 1);
738 payload = gst_rtp_buffer_get_payload (&rtp);
741 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
742 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
743 * | RR |P|V| PLEN |PEBIT|
744 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
746 /* if fragmented or gop header , write p bit =1 */
747 payload[0] = (fragmented && !found_gob) ? 0x00 : 0x04;
750 GST_BUFFER_PTS (outbuf) = rtph263ppay->first_timestamp;
751 GST_BUFFER_DURATION (outbuf) = rtph263ppay->first_duration;
752 gst_rtp_buffer_unmap (&rtp);
754 payload_buf = gst_adapter_take_buffer_fast (rtph263ppay->adapter, towrite);
755 gst_rtp_copy_meta (GST_ELEMENT_CAST (rtph263ppay), outbuf, payload_buf,
756 g_quark_from_static_string (GST_META_TAG_VIDEO_STR));
757 outbuf = gst_buffer_append (outbuf, payload_buf);
760 /* If more data is available and this is our first iteration,
761 * we create a buffer list and remember that we're fragmented.
763 * If we're fragmented already, add buffers to the previously
764 * created buffer list.
766 * Otherwise fragmented will be FALSE and we just push the single output
767 * buffer, and no list is allocated.
769 if (avail && !fragmented) {
771 list = gst_buffer_list_new ();
772 gst_buffer_list_add (list, outbuf);
773 } else if (fragmented) {
774 gst_buffer_list_add (list, outbuf);
780 gst_rtp_base_payload_push_list (GST_RTP_BASE_PAYLOAD (rtph263ppay),
784 gst_rtp_base_payload_push (GST_RTP_BASE_PAYLOAD (rtph263ppay), outbuf);
791 gst_rtp_h263p_pay_handle_buffer (GstRTPBasePayload * payload,
794 GstRtpH263PPay *rtph263ppay;
797 rtph263ppay = GST_RTP_H263P_PAY (payload);
799 rtph263ppay->first_timestamp = GST_BUFFER_PTS (buffer);
800 rtph263ppay->first_duration = GST_BUFFER_DURATION (buffer);
802 /* we always encode and flush a full picture */
803 gst_adapter_push (rtph263ppay->adapter, buffer);
804 ret = gst_rtp_h263p_pay_flush (rtph263ppay);
810 gst_rtp_h263p_pay_plugin_init (GstPlugin * plugin)
812 return gst_element_register (plugin, "rtph263ppay",
813 GST_RANK_SECONDARY, GST_TYPE_RTP_H263P_PAY);