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));
261 /* We basically need to differentiate two use-cases here: One where there's
262 * a capsfilter after the payloader with caps created from an SDP; in this
263 * case the filter caps are fixed and we want to signal to an encoder what
264 * we want it to produce. The second case is simply payloader ! depayloader
265 * where we are dealing with the depayloader's template caps. In this case
266 * we should accept any input compatible with our sink template caps. */
267 if (!gst_caps_is_fixed (peercaps))
269 gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SINKPAD (payload));
271 templ = gst_pad_get_pad_template_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
272 intersect = gst_caps_intersect (peercaps, templ);
273 gst_caps_unref (peercaps);
274 gst_caps_unref (templ);
276 if (gst_caps_is_empty (intersect))
279 caps = gst_caps_new_empty ();
280 for (i = 0; i < gst_caps_get_size (intersect); i++) {
281 GstStructure *s = gst_caps_get_structure (intersect, i);
282 const gchar *encoding_name = gst_structure_get_string (s, "encoding-name");
284 if (!strcmp (encoding_name, "H263-2000")) {
285 const gchar *profile_str = gst_structure_get_string (s, "profile");
286 const gchar *level_str = gst_structure_get_string (s, "level");
290 if (profile_str && level_str) {
291 gboolean i = FALSE, j = FALSE, l = FALSE, t = FALSE, f = FALSE,
293 GstStructure *new_s = gst_structure_new ("video/x-h263",
294 "variant", G_TYPE_STRING, "itu",
297 profile = atoi (profile_str);
298 level = atoi (level_str);
300 /* These profiles are defined in the H.263 Annex X */
303 /* The Baseline Profile (Profile 0) */
306 /* H.320 Coding Efficiency Version 2 Backward-Compatibility Profile
308 * Baseline + Annexes I, J, L.4 and T
310 i = j = l = t = TRUE;
313 /* Version 1 Backward-Compatibility Profile (Profile 2)
316 i = j = l = t = f = TRUE;
319 /* Version 2 Interactive and Streaming Wireless Profile
320 * Baseline + Annexes I, J, T
325 /* Version 3 Interactive and Streaming Wireless Profile (Profile 4)
326 * Baseline + Annexes I, J, T, V, W.6.3.8,
328 /* Missing W.6.3.8 */
329 i = j = t = v = TRUE;
332 /* Conversational High Compression Profile (Profile 5)
333 * Baseline + Annexes F, I, J, L.4, T, D, U
336 f = i = j = l = t = TRUE;
339 /* Conversational Internet Profile (Profile 6)
340 * Baseline + Annexes F, I, J, L.4, T, D, U and
341 * K with arbitratry slice ordering
343 /* Missing D, U, K with arbitratry slice ordering */
344 f = i = j = l = t = TRUE;
347 /* Conversational Interlace Profile (Profile 7)
348 * Baseline + Annexes F, I, J, L.4, T, D, U, W.6.3.11
350 /* Missing D, U, W.6.3.11 */
351 f = i = j = l = t = TRUE;
354 /* High Latency Profile (Profile 8)
355 * Baseline + Annexes F, I, J, L.4, T, D, U, P.5, O.1.1 and
356 * K with arbitratry slice ordering
358 /* Missing D, U, P.5, O.1.1 */
359 f = i = j = l = t = TRUE;
364 if (f || i || j || t || l || v) {
368 g_value_init (&list, GST_TYPE_LIST);
369 g_value_init (&vstr, G_TYPE_STRING);
371 g_value_set_static_string (&vstr, "h263");
372 gst_value_list_append_value (&list, &vstr);
373 g_value_set_static_string (&vstr, "h263p");
374 gst_value_list_append_value (&list, &vstr);
377 g_value_set_static_string (&vstr, "h263pp");
378 gst_value_list_append_value (&list, &vstr);
380 g_value_unset (&vstr);
382 gst_structure_set_value (new_s, "h263version", &list);
383 g_value_unset (&list);
385 gst_structure_set (new_s, "h263version", G_TYPE_STRING, "h263", NULL);
390 gst_structure_set (new_s, "annex-f", G_TYPE_BOOLEAN, FALSE, NULL);
392 gst_structure_set (new_s, "annex-i", G_TYPE_BOOLEAN, FALSE, NULL);
394 gst_structure_set (new_s, "annex-j", G_TYPE_BOOLEAN, FALSE, NULL);
396 gst_structure_set (new_s, "annex-t", G_TYPE_BOOLEAN, FALSE, NULL);
398 gst_structure_set (new_s, "annex-l", G_TYPE_BOOLEAN, FALSE, NULL);
400 gst_structure_set (new_s, "annex-v", G_TYPE_BOOLEAN, FALSE, NULL);
403 if (level <= 10 || level == 45) {
404 gst_structure_set (new_s,
405 "width", GST_TYPE_INT_RANGE, 1, 176,
406 "height", GST_TYPE_INT_RANGE, 1, 144,
407 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 2002, NULL);
408 caps = gst_caps_merge_structure (caps, new_s);
409 } else if (level <= 20) {
410 GstStructure *s_copy = gst_structure_copy (new_s);
412 gst_structure_set (new_s,
413 "width", GST_TYPE_INT_RANGE, 1, 352,
414 "height", GST_TYPE_INT_RANGE, 1, 288,
415 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 2002, NULL);
416 caps = gst_caps_merge_structure (caps, new_s);
418 gst_structure_set (s_copy,
419 "width", GST_TYPE_INT_RANGE, 1, 176,
420 "height", GST_TYPE_INT_RANGE, 1, 144,
421 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 1001, NULL);
422 caps = gst_caps_merge_structure (caps, s_copy);
423 } else if (level <= 40) {
425 gst_structure_set (new_s,
426 "width", GST_TYPE_INT_RANGE, 1, 352,
427 "height", GST_TYPE_INT_RANGE, 1, 288,
428 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 30000, 1001, NULL);
429 caps = gst_caps_merge_structure (caps, new_s);
430 } else if (level <= 50) {
431 GstStructure *s_copy = gst_structure_copy (new_s);
433 gst_structure_set (new_s,
434 "width", GST_TYPE_INT_RANGE, 1, 352,
435 "height", GST_TYPE_INT_RANGE, 1, 288,
436 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
437 caps = gst_caps_merge_structure (caps, new_s);
439 gst_structure_set (s_copy,
440 "width", GST_TYPE_INT_RANGE, 1, 352,
441 "height", GST_TYPE_INT_RANGE, 1, 240,
442 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
443 caps = gst_caps_merge_structure (caps, s_copy);
444 } else if (level <= 60) {
445 GstStructure *s_copy = gst_structure_copy (new_s);
447 gst_structure_set (new_s,
448 "width", GST_TYPE_INT_RANGE, 1, 720,
449 "height", GST_TYPE_INT_RANGE, 1, 288,
450 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
451 caps = gst_caps_merge_structure (caps, new_s);
453 gst_structure_set (s_copy,
454 "width", GST_TYPE_INT_RANGE, 1, 720,
455 "height", GST_TYPE_INT_RANGE, 1, 240,
456 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
457 caps = gst_caps_merge_structure (caps, s_copy);
458 } else if (level <= 70) {
459 GstStructure *s_copy = gst_structure_copy (new_s);
461 gst_structure_set (new_s,
462 "width", GST_TYPE_INT_RANGE, 1, 720,
463 "height", GST_TYPE_INT_RANGE, 1, 576,
464 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 50, 1, NULL);
465 caps = gst_caps_merge_structure (caps, new_s);
467 gst_structure_set (s_copy,
468 "width", GST_TYPE_INT_RANGE, 1, 720,
469 "height", GST_TYPE_INT_RANGE, 1, 480,
470 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 60000, 1001, NULL);
471 caps = gst_caps_merge_structure (caps, s_copy);
473 caps = gst_caps_merge_structure (caps, new_s);
477 GstStructure *new_s = gst_structure_new ("video/x-h263",
478 "variant", G_TYPE_STRING, "itu",
479 "h263version", G_TYPE_STRING, "h263",
482 GST_DEBUG_OBJECT (rtph263ppay, "No profile or level specified"
483 " for H263-2000, defaulting to baseline H263");
485 caps = gst_caps_merge_structure (caps, new_s);
488 gboolean f = FALSE, i = FALSE, j = FALSE, t = FALSE;
489 /* FIXME: ffmpeg support the Appendix K too, how do we express it ?
493 GstStructure *new_s = gst_structure_new ("video/x-h263",
494 "variant", G_TYPE_STRING, "itu",
496 gboolean added = FALSE;
498 str = gst_structure_get_string (s, "f");
499 if (str && !strcmp (str, "1"))
502 str = gst_structure_get_string (s, "i");
503 if (str && !strcmp (str, "1"))
506 str = gst_structure_get_string (s, "j");
507 if (str && !strcmp (str, "1"))
510 str = gst_structure_get_string (s, "t");
511 if (str && !strcmp (str, "1"))
514 if (f || i || j || t) {
518 g_value_init (&list, GST_TYPE_LIST);
519 g_value_init (&vstr, G_TYPE_STRING);
521 g_value_set_static_string (&vstr, "h263");
522 gst_value_list_append_value (&list, &vstr);
523 g_value_set_static_string (&vstr, "h263p");
524 gst_value_list_append_value (&list, &vstr);
525 g_value_unset (&vstr);
527 gst_structure_set_value (new_s, "h263version", &list);
528 g_value_unset (&list);
530 gst_structure_set (new_s, "h263version", G_TYPE_STRING, "h263", NULL);
534 gst_structure_set (new_s, "annex-f", G_TYPE_BOOLEAN, FALSE, NULL);
536 gst_structure_set (new_s, "annex-i", G_TYPE_BOOLEAN, FALSE, NULL);
538 gst_structure_set (new_s, "annex-j", G_TYPE_BOOLEAN, FALSE, NULL);
540 gst_structure_set (new_s, "annex-t", G_TYPE_BOOLEAN, FALSE, NULL);
543 str = gst_structure_get_string (s, "custom");
545 unsigned int xmax, ymax, mpi;
546 if (sscanf (str, "%u,%u,%u", &xmax, &ymax, &mpi) == 3) {
547 if (xmax % 4 && ymax % 4 && mpi >= 1 && mpi <= 32) {
548 caps = caps_append (caps, new_s, xmax, ymax, mpi);
551 GST_WARNING_OBJECT (rtph263ppay, "Invalid custom framesize/MPI"
552 " %u x %u at %u, ignoring", xmax, ymax, mpi);
555 GST_WARNING_OBJECT (rtph263ppay, "Invalid custom framesize/MPI: %s,"
560 str = gst_structure_get_string (s, "16cif");
562 int mpi = atoi (str);
563 caps = caps_append (caps, new_s, 1408, 1152, mpi);
567 str = gst_structure_get_string (s, "4cif");
569 int mpi = atoi (str);
570 caps = caps_append (caps, new_s, 704, 576, mpi);
574 str = gst_structure_get_string (s, "cif");
576 int mpi = atoi (str);
577 caps = caps_append (caps, new_s, 352, 288, mpi);
581 str = gst_structure_get_string (s, "qcif");
583 int mpi = atoi (str);
584 caps = caps_append (caps, new_s, 176, 144, mpi);
588 str = gst_structure_get_string (s, "sqcif");
590 int mpi = atoi (str);
591 caps = caps_append (caps, new_s, 128, 96, mpi);
596 gst_structure_free (new_s);
598 caps = gst_caps_merge_structure (caps, new_s);
602 gst_caps_unref (intersect);
609 gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
610 const GValue * value, GParamSpec * pspec)
612 GstRtpH263PPay *rtph263ppay;
614 rtph263ppay = GST_RTP_H263P_PAY (object);
617 case PROP_FRAGMENTATION_MODE:
618 rtph263ppay->fragmentation_mode = g_value_get_enum (value);
621 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
627 gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
628 GValue * value, GParamSpec * pspec)
630 GstRtpH263PPay *rtph263ppay;
632 rtph263ppay = GST_RTP_H263P_PAY (object);
635 case PROP_FRAGMENTATION_MODE:
636 g_value_set_enum (value, rtph263ppay->fragmentation_mode);
639 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
645 gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
648 GstBufferList *list = NULL;
649 GstBuffer *outbuf = NULL;
651 gboolean fragmented = FALSE;
653 avail = gst_adapter_available (rtph263ppay->adapter);
658 /* This algorithm assumes the H263/+/++ encoder sends complete frames in each
660 /* With Fragmentation Mode at GST_FRAGMENTATION_MODE_NORMAL:
661 * This algorithm implements the Follow-on packets method for packetization.
662 * This assumes low packet loss network.
663 * With Fragmentation Mode at GST_FRAGMENTATION_MODE_SYNC:
664 * This algorithm separates large frames at synchronisation points (Segments)
665 * (See RFC 4629 section 6). It would be interesting to have a property such as network
666 * quality to select between both packetization methods */
667 /* TODO Add VRC supprt (See RFC 4629 section 5.2) */
674 gboolean found_gob = FALSE;
675 GstRTPBuffer rtp = { NULL };
676 GstBuffer *payload_buf;
678 if (rtph263ppay->fragmentation_mode == GST_FRAGMENTATION_MODE_SYNC) {
679 /* start after 1st gop possible */
681 /* Check if we have a gob or eos , eossbs */
682 /* FIXME EOS and EOSSBS packets should never contain any gobs and vice-versa */
684 gst_adapter_masked_scan_uint32 (rtph263ppay->adapter, 0xffff8000,
685 0x00008000, 0, avail);
687 GST_DEBUG_OBJECT (rtph263ppay, " Found GOB header");
691 /* Find next and cut the packet accordingly */
692 /* TODO we should get as many gobs as possible until MTU is reached, this
693 * code seems to just get one GOB per packet */
694 if (next_gop == 0 && avail > 3)
696 gst_adapter_masked_scan_uint32 (rtph263ppay->adapter, 0xffff8000,
697 0x00008000, 3, avail - 3);
698 GST_DEBUG_OBJECT (rtph263ppay, " Next GOB Detected at : %d", next_gop);
703 /* for picture start frames (non-fragmented), we need to remove the first
704 * two 0x00 bytes and set P=1 */
705 if (!fragmented || found_gob) {
706 gst_adapter_flush (rtph263ppay->adapter, 2);
711 towrite = MIN (avail, gst_rtp_buffer_calc_payload_len
712 (GST_RTP_BASE_PAYLOAD_MTU (rtph263ppay) - header_len, 0, 0));
715 towrite = MIN (next_gop, towrite);
717 outbuf = gst_rtp_buffer_new_allocate (header_len, 0, 0);
719 gst_rtp_buffer_map (outbuf, GST_MAP_WRITE, &rtp);
720 /* last fragment gets the marker bit set */
721 gst_rtp_buffer_set_marker (&rtp, avail > towrite ? 0 : 1);
723 payload = gst_rtp_buffer_get_payload (&rtp);
726 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
727 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
728 * | RR |P|V| PLEN |PEBIT|
729 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
731 /* if fragmented or gop header , write p bit =1 */
732 payload[0] = (fragmented && !found_gob) ? 0x00 : 0x04;
735 GST_BUFFER_PTS (outbuf) = rtph263ppay->first_timestamp;
736 GST_BUFFER_DURATION (outbuf) = rtph263ppay->first_duration;
737 gst_rtp_buffer_unmap (&rtp);
739 payload_buf = gst_adapter_take_buffer_fast (rtph263ppay->adapter, towrite);
740 gst_rtp_copy_meta (GST_ELEMENT_CAST (rtph263ppay), outbuf, payload_buf,
741 g_quark_from_static_string (GST_META_TAG_VIDEO_STR));
742 outbuf = gst_buffer_append (outbuf, payload_buf);
745 /* If more data is available and this is our first iteration,
746 * we create a buffer list and remember that we're fragmented.
748 * If we're fragmented already, add buffers to the previously
749 * created buffer list.
751 * Otherwise fragmented will be FALSE and we just push the single output
752 * buffer, and no list is allocated.
754 if (avail && !fragmented) {
756 list = gst_buffer_list_new ();
757 gst_buffer_list_add (list, outbuf);
758 } else if (fragmented) {
759 gst_buffer_list_add (list, outbuf);
765 gst_rtp_base_payload_push_list (GST_RTP_BASE_PAYLOAD (rtph263ppay),
769 gst_rtp_base_payload_push (GST_RTP_BASE_PAYLOAD (rtph263ppay), outbuf);
776 gst_rtp_h263p_pay_handle_buffer (GstRTPBasePayload * payload,
779 GstRtpH263PPay *rtph263ppay;
782 rtph263ppay = GST_RTP_H263P_PAY (payload);
784 rtph263ppay->first_timestamp = GST_BUFFER_PTS (buffer);
785 rtph263ppay->first_duration = GST_BUFFER_DURATION (buffer);
787 /* we always encode and flush a full picture */
788 gst_adapter_push (rtph263ppay->adapter, buffer);
789 ret = gst_rtp_h263p_pay_flush (rtph263ppay);
795 gst_rtp_h263p_pay_plugin_init (GstPlugin * plugin)
797 return gst_element_register (plugin, "rtph263ppay",
798 GST_RANK_SECONDARY, GST_TYPE_RTP_H263P_PAY);