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 "gstrtpmp4gdepay.h"
30 GST_DEBUG_CATEGORY_STATIC (rtpmp4gdepay_debug);
31 #define GST_CAT_DEFAULT (rtpmp4gdepay_debug)
33 static GstStaticPadTemplate gst_rtp_mp4g_depay_src_template =
34 GST_STATIC_PAD_TEMPLATE ("src",
37 GST_STATIC_CAPS ("video/mpeg,"
38 "mpegversion=(int) 4,"
39 "systemstream=(boolean)false;"
40 "audio/mpeg," "mpegversion=(int) 4, " "stream-format=(string)raw")
43 static GstStaticPadTemplate gst_rtp_mp4g_depay_sink_template =
44 GST_STATIC_PAD_TEMPLATE ("sink",
47 GST_STATIC_CAPS ("application/x-rtp, "
48 "media = (string) { \"video\", \"audio\", \"application\" }, "
49 "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
50 "clock-rate = (int) [1, MAX ], "
51 "encoding-name = (string) \"MPEG4-GENERIC\", "
52 /* required string params */
53 "streamtype = (string) { \"4\", \"5\" }, " /* 4 = video, 5 = audio */
54 /* "profile-level-id = (string) [1,MAX], " */
55 /* "config = (string) [1,MAX]" */
56 "mode = (string) { \"generic\", \"CELP-cbr\", \"CELP-vbr\", \"AAC-lbr\", \"AAC-hbr\" } "
57 /* Optional general parameters */
58 /* "objecttype = (string) [1,MAX], " */
59 /* "constantsize = (string) [1,MAX], " *//* constant size of each AU */
60 /* "constantduration = (string) [1,MAX], " *//* constant duration of each AU */
61 /* "maxdisplacement = (string) [1,MAX], " */
62 /* "de-interleavebuffersize = (string) [1,MAX], " */
63 /* Optional configuration parameters */
64 /* "sizelength = (string) [1, 32], " */
65 /* "indexlength = (string) [1, 32], " */
66 /* "indexdeltalength = (string) [1, 32], " */
67 /* "ctsdeltalength = (string) [1, 32], " */
68 /* "dtsdeltalength = (string) [1, 32], " */
69 /* "randomaccessindication = (string) {0, 1}, " */
70 /* "streamstateindication = (string) [0, 32], " */
71 /* "auxiliarydatasizelength = (string) [0, 32]" */ )
74 /* simple bitstream parser */
79 gint head; /* bitpos in the cache of next bit */
80 guint64 cache; /* cached bytes */
84 gst_bs_parse_init (GstBsParse * bs, const guint8 * data, guint size)
87 bs->end = data + size;
89 bs->cache = 0xffffffff;
93 gst_bs_parse_read (GstBsParse * bs, guint n)
101 /* fill up the cache if we need to */
102 while (bs->head < n) {
103 if (bs->data >= bs->end) {
104 /* we're at the end, can't produce more than head number of bits */
108 /* shift bytes in cache, moving the head bits of the cache left */
109 bs->cache = (bs->cache << 8) | *bs->data++;
113 /* bring the required bits down and truncate */
114 if ((shift = bs->head - n) > 0)
115 res = bs->cache >> shift;
119 /* mask out required bits */
129 GST_BOILERPLATE (GstRtpMP4GDepay, gst_rtp_mp4g_depay, GstBaseRTPDepayload,
130 GST_TYPE_BASE_RTP_DEPAYLOAD);
132 static void gst_rtp_mp4g_depay_finalize (GObject * object);
134 static gboolean gst_rtp_mp4g_depay_setcaps (GstBaseRTPDepayload * depayload,
136 static GstBuffer *gst_rtp_mp4g_depay_process (GstBaseRTPDepayload * depayload,
138 static gboolean gst_rtp_mp4g_depay_handle_event (GstBaseRTPDepayload * filter,
141 static GstStateChangeReturn gst_rtp_mp4g_depay_change_state (GstElement *
142 element, GstStateChange transition);
146 gst_rtp_mp4g_depay_base_init (gpointer klass)
148 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
150 gst_element_class_add_pad_template (element_class,
151 gst_static_pad_template_get (&gst_rtp_mp4g_depay_src_template));
152 gst_element_class_add_pad_template (element_class,
153 gst_static_pad_template_get (&gst_rtp_mp4g_depay_sink_template));
155 gst_element_class_set_details_simple (element_class,
156 "RTP MPEG4 ES depayloader", "Codec/Depayloader/Network/RTP",
157 "Extracts MPEG4 elementary streams from RTP packets (RFC 3640)",
158 "Wim Taymans <wim.taymans@gmail.com>");
162 gst_rtp_mp4g_depay_class_init (GstRtpMP4GDepayClass * klass)
164 GObjectClass *gobject_class;
165 GstElementClass *gstelement_class;
166 GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
168 gobject_class = (GObjectClass *) klass;
169 gstelement_class = (GstElementClass *) klass;
170 gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
172 gobject_class->finalize = gst_rtp_mp4g_depay_finalize;
174 gstelement_class->change_state = gst_rtp_mp4g_depay_change_state;
176 gstbasertpdepayload_class->process = gst_rtp_mp4g_depay_process;
177 gstbasertpdepayload_class->set_caps = gst_rtp_mp4g_depay_setcaps;
178 gstbasertpdepayload_class->handle_event = gst_rtp_mp4g_depay_handle_event;
180 GST_DEBUG_CATEGORY_INIT (rtpmp4gdepay_debug, "rtpmp4gdepay", 0,
181 "MP4-generic RTP Depayloader");
185 gst_rtp_mp4g_depay_init (GstRtpMP4GDepay * rtpmp4gdepay,
186 GstRtpMP4GDepayClass * klass)
188 rtpmp4gdepay->adapter = gst_adapter_new ();
189 rtpmp4gdepay->packets = g_queue_new ();
193 gst_rtp_mp4g_depay_finalize (GObject * object)
195 GstRtpMP4GDepay *rtpmp4gdepay;
197 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (object);
199 g_object_unref (rtpmp4gdepay->adapter);
200 rtpmp4gdepay->adapter = NULL;
201 g_queue_free (rtpmp4gdepay->packets);
202 rtpmp4gdepay->packets = NULL;
204 G_OBJECT_CLASS (parent_class)->finalize (object);
208 gst_rtp_mp4g_depay_parse_int (GstStructure * structure, const gchar * field,
214 if ((str = gst_structure_get_string (structure, field)))
217 if (gst_structure_get_int (structure, field, &res))
224 gst_rtp_mp4g_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
226 GstStructure *structure;
227 GstRtpMP4GDepay *rtpmp4gdepay;
228 GstCaps *srccaps = NULL;
234 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (depayload);
236 structure = gst_caps_get_structure (caps, 0);
238 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
239 clock_rate = 90000; /* default */
240 depayload->clock_rate = clock_rate;
242 if ((str = gst_structure_get_string (structure, "media"))) {
243 if (strcmp (str, "audio") == 0) {
244 srccaps = gst_caps_new_simple ("audio/mpeg",
245 "mpegversion", G_TYPE_INT, 4, "stream-format", G_TYPE_STRING, "raw",
247 } else if (strcmp (str, "video") == 0) {
248 srccaps = gst_caps_new_simple ("video/mpeg",
249 "mpegversion", G_TYPE_INT, 4,
250 "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
256 /* these values are optional and have a default value of 0 (no header) */
257 rtpmp4gdepay->sizelength =
258 gst_rtp_mp4g_depay_parse_int (structure, "sizelength", 0);
259 rtpmp4gdepay->indexlength =
260 gst_rtp_mp4g_depay_parse_int (structure, "indexlength", 0);
261 rtpmp4gdepay->indexdeltalength =
262 gst_rtp_mp4g_depay_parse_int (structure, "indexdeltalength", 0);
263 rtpmp4gdepay->ctsdeltalength =
264 gst_rtp_mp4g_depay_parse_int (structure, "ctsdeltalength", 0);
265 rtpmp4gdepay->dtsdeltalength =
266 gst_rtp_mp4g_depay_parse_int (structure, "dtsdeltalength", 0);
268 gst_rtp_mp4g_depay_parse_int (structure, "randomaccessindication", 0);
269 rtpmp4gdepay->randomaccessindication = someint > 0 ? 1 : 0;
270 rtpmp4gdepay->streamstateindication =
271 gst_rtp_mp4g_depay_parse_int (structure, "streamstateindication", 0);
272 rtpmp4gdepay->auxiliarydatasizelength =
273 gst_rtp_mp4g_depay_parse_int (structure, "auxiliarydatasizelength", 0);
274 rtpmp4gdepay->constantSize =
275 gst_rtp_mp4g_depay_parse_int (structure, "constantsize", 0);
276 rtpmp4gdepay->constantDuration =
277 gst_rtp_mp4g_depay_parse_int (structure, "constantduration", 0);
278 rtpmp4gdepay->maxDisplacement =
279 gst_rtp_mp4g_depay_parse_int (structure, "maxdisplacement", 0);
282 /* get config string */
283 if ((str = gst_structure_get_string (structure, "config"))) {
286 g_value_init (&v, GST_TYPE_BUFFER);
287 if (gst_value_deserialize (&v, str)) {
290 buffer = gst_value_get_buffer (&v);
291 gst_caps_set_simple (srccaps,
292 "codec_data", GST_TYPE_BUFFER, buffer, NULL);
295 g_warning ("cannot convert config to buffer");
299 res = gst_pad_set_caps (depayload->srcpad, srccaps);
300 gst_caps_unref (srccaps);
307 GST_DEBUG_OBJECT (rtpmp4gdepay, "Unknown media type");
313 gst_rtp_mp4g_depay_clear_queue (GstRtpMP4GDepay * rtpmp4gdepay)
317 while ((outbuf = g_queue_pop_head (rtpmp4gdepay->packets)))
318 gst_buffer_unref (outbuf);
322 gst_rtp_mp4g_depay_reset (GstRtpMP4GDepay * rtpmp4gdepay)
324 gst_adapter_clear (rtpmp4gdepay->adapter);
325 rtpmp4gdepay->max_AU_index = -1;
326 rtpmp4gdepay->next_AU_index = -1;
327 rtpmp4gdepay->prev_AU_index = -1;
328 rtpmp4gdepay->prev_rtptime = -1;
329 rtpmp4gdepay->last_AU_index = -1;
330 gst_rtp_mp4g_depay_clear_queue (rtpmp4gdepay);
334 gst_rtp_mp4g_depay_flush_queue (GstRtpMP4GDepay * rtpmp4gdepay)
337 gboolean discont = FALSE;
340 while ((outbuf = g_queue_pop_head (rtpmp4gdepay->packets))) {
341 AU_index = GST_BUFFER_OFFSET (outbuf);
343 GST_DEBUG_OBJECT (rtpmp4gdepay, "next available AU_index %u", AU_index);
345 if (rtpmp4gdepay->next_AU_index != AU_index) {
346 GST_DEBUG_OBJECT (rtpmp4gdepay, "discont, expected AU_index %u",
347 rtpmp4gdepay->next_AU_index);
352 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
356 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing AU_index %u", AU_index);
357 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay), outbuf);
358 rtpmp4gdepay->next_AU_index = AU_index + 1;
363 gst_rtp_mp4g_depay_queue (GstRtpMP4GDepay * rtpmp4gdepay, GstBuffer * outbuf)
365 guint AU_index = GST_BUFFER_OFFSET (outbuf);
367 if (rtpmp4gdepay->next_AU_index == -1) {
368 GST_DEBUG_OBJECT (rtpmp4gdepay, "Init AU counter %u", AU_index);
369 rtpmp4gdepay->next_AU_index = AU_index;
372 if (rtpmp4gdepay->next_AU_index == AU_index) {
373 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing expected AU_index %u", AU_index);
375 /* we received the expected packet, push it and flush as much as we can from
377 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay), outbuf);
378 rtpmp4gdepay->next_AU_index++;
380 while ((outbuf = g_queue_peek_head (rtpmp4gdepay->packets))) {
381 AU_index = GST_BUFFER_OFFSET (outbuf);
383 GST_DEBUG_OBJECT (rtpmp4gdepay, "next available AU_index %u", AU_index);
385 if (rtpmp4gdepay->next_AU_index == AU_index) {
386 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing expected AU_index %u",
388 outbuf = g_queue_pop_head (rtpmp4gdepay->packets);
389 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay),
391 rtpmp4gdepay->next_AU_index++;
393 GST_DEBUG_OBJECT (rtpmp4gdepay, "waiting for next AU_index %u",
394 rtpmp4gdepay->next_AU_index);
401 GST_DEBUG_OBJECT (rtpmp4gdepay, "queueing AU_index %u", AU_index);
403 /* loop the list to skip strictly smaller AU_index buffers */
404 for (list = rtpmp4gdepay->packets->head; list; list = g_list_next (list)) {
408 idx = GST_BUFFER_OFFSET (GST_BUFFER_CAST (list->data));
410 /* compare the new seqnum to the one in the buffer */
411 gap = (gint) (idx - AU_index);
413 GST_DEBUG_OBJECT (rtpmp4gdepay, "compare with AU_index %u, gap %d", idx,
416 /* AU_index <= idx, we can stop looking */
417 if (G_LIKELY (gap > 0))
421 g_queue_insert_before (rtpmp4gdepay->packets, list, outbuf);
423 g_queue_push_tail (rtpmp4gdepay->packets, outbuf);
428 gst_rtp_mp4g_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
430 GstRtpMP4GDepay *rtpmp4gdepay;
432 GstClockTime timestamp;
434 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (depayload);
436 /* flush remaining data on discont */
437 if (GST_BUFFER_IS_DISCONT (buf)) {
438 GST_DEBUG_OBJECT (rtpmp4gdepay, "received DISCONT");
439 gst_adapter_clear (rtpmp4gdepay->adapter);
442 timestamp = GST_BUFFER_TIMESTAMP (buf);
445 gint payload_len, payload_AU;
448 guint AU_headers_len;
449 guint AU_size, AU_index, AU_index_delta, payload_AU_size;
452 payload_len = gst_rtp_buffer_get_payload_len (buf);
453 payload = gst_rtp_buffer_get_payload (buf);
455 GST_DEBUG_OBJECT (rtpmp4gdepay, "received payload of %d", payload_len);
457 rtptime = gst_rtp_buffer_get_timestamp (buf);
458 M = gst_rtp_buffer_get_marker (buf);
460 if (rtpmp4gdepay->sizelength > 0) {
461 gint num_AU_headers, AU_headers_bytes, i;
467 /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
468 * |AU-headers-length|AU-header|AU-header| |AU-header|padding|
469 * | | (1) | (2) | | (n) * | bits |
470 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
472 * The length is 2 bytes and contains the length of the following
473 * AU-headers in bits.
475 AU_headers_len = (payload[0] << 8) | payload[1];
476 AU_headers_bytes = (AU_headers_len + 7) / 8;
477 num_AU_headers = AU_headers_len / 16;
479 GST_DEBUG_OBJECT (rtpmp4gdepay, "AU headers len %d, bytes %d, num %d",
480 AU_headers_len, AU_headers_bytes, num_AU_headers);
486 if (payload_len < AU_headers_bytes)
489 /* skip special headers, point to first payload AU */
490 payload_AU = 2 + AU_headers_bytes;
491 payload_AU_size = payload_len - AU_headers_bytes;
493 if (G_UNLIKELY (rtpmp4gdepay->auxiliarydatasizelength)) {
496 /* point the bitstream parser to the first auxiliary data bit */
497 gst_bs_parse_init (&bs, payload + AU_headers_bytes,
498 payload_len - AU_headers_bytes);
500 gst_bs_parse_read (&bs, rtpmp4gdepay->auxiliarydatasizelength);
501 /* convert to bytes */
502 aux_size = (aux_size + 7) / 8;
503 /* AU data then follows auxiliary data */
504 if (payload_AU_size < aux_size)
506 payload_AU += aux_size;
507 payload_AU_size -= aux_size;
510 /* point the bitstream parser to the first AU header bit */
511 gst_bs_parse_init (&bs, payload, payload_len);
512 AU_index = AU_index_delta = 0;
514 for (i = 0; i < num_AU_headers && payload_AU_size > 0; i++) {
516 * +---------------------------------------+
518 * +---------------------------------------+
519 * | AU-Index / AU-Index-delta |
520 * +---------------------------------------+
522 * +---------------------------------------+
524 * +---------------------------------------+
526 * +---------------------------------------+
528 * +---------------------------------------+
530 * +---------------------------------------+
532 * +---------------------------------------+
534 AU_size = gst_bs_parse_read (&bs, rtpmp4gdepay->sizelength);
536 /* calculate the AU_index, which is only on the first AU of the packet
537 * and the AU_index_delta on the other AUs. This will be used to
538 * reconstruct the AU ordering when interleaving. */
540 AU_index = gst_bs_parse_read (&bs, rtpmp4gdepay->indexlength);
542 GST_DEBUG_OBJECT (rtpmp4gdepay, "AU index %u", AU_index);
544 if (AU_index == 0 && rtpmp4gdepay->prev_AU_index == 0) {
548 /* if we see two consecutive packets with AU_index of 0, we can
549 * assume we have constantDuration packets. Since we don't have
550 * the index we must use the AU duration to calculate the
551 * index. Get the diff between the timestamps first, this can be
552 * positive or negative. */
553 if (rtpmp4gdepay->prev_rtptime <= rtptime)
554 diff = rtptime - rtpmp4gdepay->prev_rtptime;
556 diff = -(rtpmp4gdepay->prev_rtptime - rtptime);
558 /* if no constantDuration was given, make one */
559 if (rtpmp4gdepay->constantDuration != 0) {
560 cd = rtpmp4gdepay->constantDuration;
561 GST_DEBUG_OBJECT (depayload, "using constantDuration %d", cd);
562 } else if (rtpmp4gdepay->prev_AU_num > 0) {
563 /* use number of packets and of previous frame */
564 cd = diff / rtpmp4gdepay->prev_AU_num;
565 GST_DEBUG_OBJECT (depayload, "guessing constantDuration %d", cd);
567 /* assume this frame has the same number of packets as the
569 cd = diff / num_AU_headers;
570 GST_DEBUG_OBJECT (depayload, "guessing constantDuration %d", cd);
574 /* get the number of packets by dividing with the duration */
580 rtpmp4gdepay->last_AU_index += diff;
581 rtpmp4gdepay->prev_AU_index = AU_index;
583 AU_index = rtpmp4gdepay->last_AU_index;
585 GST_DEBUG_OBJECT (rtpmp4gdepay, "diff %d, AU index %u", diff,
588 rtpmp4gdepay->prev_AU_index = AU_index;
589 rtpmp4gdepay->last_AU_index = AU_index;
592 /* keep track of the higest AU_index */
593 if (rtpmp4gdepay->max_AU_index != -1
594 && rtpmp4gdepay->max_AU_index <= AU_index) {
595 GST_DEBUG_OBJECT (rtpmp4gdepay, "new interleave group, flushing");
596 /* a new interleave group started, flush */
597 gst_rtp_mp4g_depay_flush_queue (rtpmp4gdepay);
599 if (G_UNLIKELY (!rtpmp4gdepay->maxDisplacement &&
600 rtpmp4gdepay->max_AU_index != -1
601 && rtpmp4gdepay->max_AU_index >= AU_index)) {
604 /* some broken non-interleaved streams have AU-index jumping around
605 * all over the place, apparently assuming receiver disregards */
606 GST_DEBUG_OBJECT (rtpmp4gdepay, "non-interleaved broken AU indices;"
607 " forcing continuous flush");
608 /* reset AU to avoid repeated DISCONT in such case */
609 outbuf = g_queue_peek_head (rtpmp4gdepay->packets);
610 if (G_LIKELY (outbuf)) {
611 rtpmp4gdepay->next_AU_index = GST_BUFFER_OFFSET (outbuf);
612 gst_rtp_mp4g_depay_flush_queue (rtpmp4gdepay);
615 rtpmp4gdepay->prev_rtptime = rtptime;
616 rtpmp4gdepay->prev_AU_num = num_AU_headers;
619 gst_bs_parse_read (&bs, rtpmp4gdepay->indexdeltalength);
620 AU_index += AU_index_delta + 1;
622 /* keep track of highest AU_index */
623 if (rtpmp4gdepay->max_AU_index == -1
624 || AU_index > rtpmp4gdepay->max_AU_index)
625 rtpmp4gdepay->max_AU_index = AU_index;
627 /* the presentation time offset, a 2s-complement value, we need this to
628 * calculate the timestamp on the output packet. */
629 if (rtpmp4gdepay->ctsdeltalength > 0) {
630 if (gst_bs_parse_read (&bs, 1))
631 gst_bs_parse_read (&bs, rtpmp4gdepay->ctsdeltalength);
633 /* the decoding time offset, a 2s-complement value */
634 if (rtpmp4gdepay->dtsdeltalength > 0) {
635 if (gst_bs_parse_read (&bs, 1))
636 gst_bs_parse_read (&bs, rtpmp4gdepay->dtsdeltalength);
638 /* RAP-flag to indicate that the AU contains a keyframe */
639 if (rtpmp4gdepay->randomaccessindication)
640 gst_bs_parse_read (&bs, 1);
642 if (rtpmp4gdepay->streamstateindication > 0)
643 gst_bs_parse_read (&bs, rtpmp4gdepay->streamstateindication);
645 GST_DEBUG_OBJECT (rtpmp4gdepay, "size %d, index %d, delta %d", AU_size,
646 AU_index, AU_index_delta);
648 /* fragmented pakets have the AU_size set to the size of the
649 * unfragmented AU. */
650 if (AU_size > payload_AU_size)
651 AU_size = payload_AU_size;
653 /* collect stuff in the adapter, strip header from payload and push in
656 gst_rtp_buffer_get_payload_subbuffer (buf, payload_AU, AU_size);
657 gst_adapter_push (rtpmp4gdepay->adapter, outbuf);
662 /* packet is complete, flush */
663 avail = gst_adapter_available (rtpmp4gdepay->adapter);
665 outbuf = gst_adapter_take_buffer (rtpmp4gdepay->adapter, avail);
666 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
668 /* copy some of the fields we calculated above on the buffer. We also
669 * copy the AU_index so that we can sort the packets in our queue. */
670 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
671 GST_BUFFER_OFFSET (outbuf) = AU_index;
673 /* make sure we don't use the timestamp again for other AUs in this
677 GST_DEBUG_OBJECT (depayload, "pushing buffer of size %d",
678 GST_BUFFER_SIZE (outbuf));
680 gst_rtp_mp4g_depay_queue (rtpmp4gdepay, outbuf);
683 payload_AU += AU_size;
684 payload_AU_size -= AU_size;
687 /* push complete buffer in adapter */
688 outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, 0, payload_len);
689 gst_adapter_push (rtpmp4gdepay->adapter, outbuf);
691 /* if this was the last packet of the VOP, create and push a buffer */
695 avail = gst_adapter_available (rtpmp4gdepay->adapter);
697 outbuf = gst_adapter_take_buffer (rtpmp4gdepay->adapter, avail);
699 GST_DEBUG ("gst_rtp_mp4g_depay_chain: pushing buffer of size %d",
700 GST_BUFFER_SIZE (outbuf));
711 GST_ELEMENT_WARNING (rtpmp4gdepay, STREAM, DECODE,
712 ("Packet payload was too short."), (NULL));
718 gst_rtp_mp4g_depay_handle_event (GstBaseRTPDepayload * filter, GstEvent * event)
721 GstRtpMP4GDepay *rtpmp4gdepay;
723 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (filter);
725 switch (GST_EVENT_TYPE (event)) {
726 case GST_EVENT_FLUSH_STOP:
727 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
734 GST_BASE_RTP_DEPAYLOAD_CLASS (parent_class)->handle_event (filter, event);
739 static GstStateChangeReturn
740 gst_rtp_mp4g_depay_change_state (GstElement * element,
741 GstStateChange transition)
743 GstRtpMP4GDepay *rtpmp4gdepay;
744 GstStateChangeReturn ret;
746 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (element);
748 switch (transition) {
749 case GST_STATE_CHANGE_READY_TO_PAUSED:
750 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
756 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
758 switch (transition) {
759 case GST_STATE_CHANGE_PAUSED_TO_READY:
760 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
769 gst_rtp_mp4g_depay_plugin_init (GstPlugin * plugin)
771 return gst_element_register (plugin, "rtpmp4gdepay",
772 GST_RANK_SECONDARY, GST_TYPE_RTP_MP4G_DEPAY);