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 #define gst_rtp_mp4g_depay_parent_class parent_class
130 G_DEFINE_TYPE (GstRtpMP4GDepay, gst_rtp_mp4g_depay,
131 GST_TYPE_BASE_RTP_DEPAYLOAD);
133 static void gst_rtp_mp4g_depay_finalize (GObject * object);
135 static gboolean gst_rtp_mp4g_depay_setcaps (GstBaseRTPDepayload * depayload,
137 static GstBuffer *gst_rtp_mp4g_depay_process (GstBaseRTPDepayload * depayload,
139 static gboolean gst_rtp_mp4g_depay_handle_event (GstBaseRTPDepayload * filter,
142 static GstStateChangeReturn gst_rtp_mp4g_depay_change_state (GstElement *
143 element, GstStateChange transition);
147 gst_rtp_mp4g_depay_class_init (GstRtpMP4GDepayClass * klass)
149 GObjectClass *gobject_class;
150 GstElementClass *gstelement_class;
151 GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
153 gobject_class = (GObjectClass *) klass;
154 gstelement_class = (GstElementClass *) klass;
155 gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
157 gobject_class->finalize = gst_rtp_mp4g_depay_finalize;
159 gstelement_class->change_state = gst_rtp_mp4g_depay_change_state;
161 gstbasertpdepayload_class->process = gst_rtp_mp4g_depay_process;
162 gstbasertpdepayload_class->set_caps = gst_rtp_mp4g_depay_setcaps;
163 gstbasertpdepayload_class->handle_event = gst_rtp_mp4g_depay_handle_event;
165 gst_element_class_add_pad_template (gstelement_class,
166 gst_static_pad_template_get (&gst_rtp_mp4g_depay_src_template));
167 gst_element_class_add_pad_template (gstelement_class,
168 gst_static_pad_template_get (&gst_rtp_mp4g_depay_sink_template));
170 gst_element_class_set_details_simple (gstelement_class,
171 "RTP MPEG4 ES depayloader", "Codec/Depayloader/Network/RTP",
172 "Extracts MPEG4 elementary streams from RTP packets (RFC 3640)",
173 "Wim Taymans <wim.taymans@gmail.com>");
175 GST_DEBUG_CATEGORY_INIT (rtpmp4gdepay_debug, "rtpmp4gdepay", 0,
176 "MP4-generic RTP Depayloader");
180 gst_rtp_mp4g_depay_init (GstRtpMP4GDepay * rtpmp4gdepay)
182 rtpmp4gdepay->adapter = gst_adapter_new ();
183 rtpmp4gdepay->packets = g_queue_new ();
187 gst_rtp_mp4g_depay_finalize (GObject * object)
189 GstRtpMP4GDepay *rtpmp4gdepay;
191 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (object);
193 g_object_unref (rtpmp4gdepay->adapter);
194 rtpmp4gdepay->adapter = NULL;
195 g_queue_free (rtpmp4gdepay->packets);
196 rtpmp4gdepay->packets = NULL;
198 G_OBJECT_CLASS (parent_class)->finalize (object);
202 gst_rtp_mp4g_depay_parse_int (GstStructure * structure, const gchar * field,
208 if ((str = gst_structure_get_string (structure, field)))
211 if (gst_structure_get_int (structure, field, &res))
218 gst_rtp_mp4g_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
220 GstStructure *structure;
221 GstRtpMP4GDepay *rtpmp4gdepay;
222 GstCaps *srccaps = NULL;
228 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (depayload);
230 structure = gst_caps_get_structure (caps, 0);
232 if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
233 clock_rate = 90000; /* default */
234 depayload->clock_rate = clock_rate;
236 if ((str = gst_structure_get_string (structure, "media"))) {
237 if (strcmp (str, "audio") == 0) {
238 srccaps = gst_caps_new_simple ("audio/mpeg",
239 "mpegversion", G_TYPE_INT, 4, "stream-format", G_TYPE_STRING, "raw",
241 } else if (strcmp (str, "video") == 0) {
242 srccaps = gst_caps_new_simple ("video/mpeg",
243 "mpegversion", G_TYPE_INT, 4,
244 "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
250 /* these values are optional and have a default value of 0 (no header) */
251 rtpmp4gdepay->sizelength =
252 gst_rtp_mp4g_depay_parse_int (structure, "sizelength", 0);
253 rtpmp4gdepay->indexlength =
254 gst_rtp_mp4g_depay_parse_int (structure, "indexlength", 0);
255 rtpmp4gdepay->indexdeltalength =
256 gst_rtp_mp4g_depay_parse_int (structure, "indexdeltalength", 0);
257 rtpmp4gdepay->ctsdeltalength =
258 gst_rtp_mp4g_depay_parse_int (structure, "ctsdeltalength", 0);
259 rtpmp4gdepay->dtsdeltalength =
260 gst_rtp_mp4g_depay_parse_int (structure, "dtsdeltalength", 0);
262 gst_rtp_mp4g_depay_parse_int (structure, "randomaccessindication", 0);
263 rtpmp4gdepay->randomaccessindication = someint > 0 ? 1 : 0;
264 rtpmp4gdepay->streamstateindication =
265 gst_rtp_mp4g_depay_parse_int (structure, "streamstateindication", 0);
266 rtpmp4gdepay->auxiliarydatasizelength =
267 gst_rtp_mp4g_depay_parse_int (structure, "auxiliarydatasizelength", 0);
268 rtpmp4gdepay->constantSize =
269 gst_rtp_mp4g_depay_parse_int (structure, "constantsize", 0);
270 rtpmp4gdepay->constantDuration =
271 gst_rtp_mp4g_depay_parse_int (structure, "constantduration", 0);
272 rtpmp4gdepay->maxDisplacement =
273 gst_rtp_mp4g_depay_parse_int (structure, "maxdisplacement", 0);
276 /* get config string */
277 if ((str = gst_structure_get_string (structure, "config"))) {
280 g_value_init (&v, GST_TYPE_BUFFER);
281 if (gst_value_deserialize (&v, str)) {
284 buffer = gst_value_get_buffer (&v);
285 gst_caps_set_simple (srccaps,
286 "codec_data", GST_TYPE_BUFFER, buffer, NULL);
289 g_warning ("cannot convert config to buffer");
293 res = gst_pad_set_caps (depayload->srcpad, srccaps);
294 gst_caps_unref (srccaps);
301 GST_DEBUG_OBJECT (rtpmp4gdepay, "Unknown media type");
307 gst_rtp_mp4g_depay_clear_queue (GstRtpMP4GDepay * rtpmp4gdepay)
311 while ((outbuf = g_queue_pop_head (rtpmp4gdepay->packets)))
312 gst_buffer_unref (outbuf);
316 gst_rtp_mp4g_depay_reset (GstRtpMP4GDepay * rtpmp4gdepay)
318 gst_adapter_clear (rtpmp4gdepay->adapter);
319 rtpmp4gdepay->max_AU_index = -1;
320 rtpmp4gdepay->next_AU_index = -1;
321 rtpmp4gdepay->prev_AU_index = -1;
322 rtpmp4gdepay->prev_rtptime = -1;
323 rtpmp4gdepay->last_AU_index = -1;
324 gst_rtp_mp4g_depay_clear_queue (rtpmp4gdepay);
328 gst_rtp_mp4g_depay_flush_queue (GstRtpMP4GDepay * rtpmp4gdepay)
331 gboolean discont = FALSE;
334 while ((outbuf = g_queue_pop_head (rtpmp4gdepay->packets))) {
335 AU_index = GST_BUFFER_OFFSET (outbuf);
337 GST_DEBUG_OBJECT (rtpmp4gdepay, "next available AU_index %u", AU_index);
339 if (rtpmp4gdepay->next_AU_index != AU_index) {
340 GST_DEBUG_OBJECT (rtpmp4gdepay, "discont, expected AU_index %u",
341 rtpmp4gdepay->next_AU_index);
346 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
350 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing AU_index %u", AU_index);
351 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay), outbuf);
352 rtpmp4gdepay->next_AU_index = AU_index + 1;
357 gst_rtp_mp4g_depay_queue (GstRtpMP4GDepay * rtpmp4gdepay, GstBuffer * outbuf)
359 guint AU_index = GST_BUFFER_OFFSET (outbuf);
361 if (rtpmp4gdepay->next_AU_index == -1) {
362 GST_DEBUG_OBJECT (rtpmp4gdepay, "Init AU counter %u", AU_index);
363 rtpmp4gdepay->next_AU_index = AU_index;
366 if (rtpmp4gdepay->next_AU_index == AU_index) {
367 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing expected AU_index %u", AU_index);
369 /* we received the expected packet, push it and flush as much as we can from
371 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay), outbuf);
372 rtpmp4gdepay->next_AU_index++;
374 while ((outbuf = g_queue_peek_head (rtpmp4gdepay->packets))) {
375 AU_index = GST_BUFFER_OFFSET (outbuf);
377 GST_DEBUG_OBJECT (rtpmp4gdepay, "next available AU_index %u", AU_index);
379 if (rtpmp4gdepay->next_AU_index == AU_index) {
380 GST_DEBUG_OBJECT (rtpmp4gdepay, "pushing expected AU_index %u",
382 outbuf = g_queue_pop_head (rtpmp4gdepay->packets);
383 gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpmp4gdepay),
385 rtpmp4gdepay->next_AU_index++;
387 GST_DEBUG_OBJECT (rtpmp4gdepay, "waiting for next AU_index %u",
388 rtpmp4gdepay->next_AU_index);
395 GST_DEBUG_OBJECT (rtpmp4gdepay, "queueing AU_index %u", AU_index);
397 /* loop the list to skip strictly smaller AU_index buffers */
398 for (list = rtpmp4gdepay->packets->head; list; list = g_list_next (list)) {
402 idx = GST_BUFFER_OFFSET (GST_BUFFER_CAST (list->data));
404 /* compare the new seqnum to the one in the buffer */
405 gap = (gint) (idx - AU_index);
407 GST_DEBUG_OBJECT (rtpmp4gdepay, "compare with AU_index %u, gap %d", idx,
410 /* AU_index <= idx, we can stop looking */
411 if (G_LIKELY (gap > 0))
415 g_queue_insert_before (rtpmp4gdepay->packets, list, outbuf);
417 g_queue_push_tail (rtpmp4gdepay->packets, outbuf);
422 gst_rtp_mp4g_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
424 GstRtpMP4GDepay *rtpmp4gdepay;
425 GstBuffer *outbuf = NULL;
426 GstClockTime timestamp;
429 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (depayload);
431 /* flush remaining data on discont */
432 if (GST_BUFFER_IS_DISCONT (buf)) {
433 GST_DEBUG_OBJECT (rtpmp4gdepay, "received DISCONT");
434 gst_adapter_clear (rtpmp4gdepay->adapter);
437 timestamp = GST_BUFFER_TIMESTAMP (buf);
440 gint payload_len, payload_AU;
443 guint AU_headers_len;
444 guint AU_size, AU_index, AU_index_delta, payload_AU_size;
447 gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
448 payload_len = gst_rtp_buffer_get_payload_len (&rtp);
449 payload = gst_rtp_buffer_get_payload (&rtp);
451 GST_DEBUG_OBJECT (rtpmp4gdepay, "received payload of %d", payload_len);
453 rtptime = gst_rtp_buffer_get_timestamp (&rtp);
454 M = gst_rtp_buffer_get_marker (&rtp);
456 gst_rtp_buffer_unmap (&rtp);
458 if (rtpmp4gdepay->sizelength > 0) {
459 gint num_AU_headers, AU_headers_bytes, i;
465 /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
466 * |AU-headers-length|AU-header|AU-header| |AU-header|padding|
467 * | | (1) | (2) | | (n) * | bits |
468 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
470 * The length is 2 bytes and contains the length of the following
471 * AU-headers in bits.
473 AU_headers_len = (payload[0] << 8) | payload[1];
474 AU_headers_bytes = (AU_headers_len + 7) / 8;
475 num_AU_headers = AU_headers_len / 16;
477 GST_DEBUG_OBJECT (rtpmp4gdepay, "AU headers len %d, bytes %d, num %d",
478 AU_headers_len, AU_headers_bytes, num_AU_headers);
484 if (payload_len < AU_headers_bytes)
487 /* skip special headers, point to first payload AU */
488 payload_AU = 2 + AU_headers_bytes;
489 payload_AU_size = payload_len - AU_headers_bytes;
491 if (G_UNLIKELY (rtpmp4gdepay->auxiliarydatasizelength)) {
494 /* point the bitstream parser to the first auxiliary data bit */
495 gst_bs_parse_init (&bs, payload + AU_headers_bytes,
496 payload_len - AU_headers_bytes);
498 gst_bs_parse_read (&bs, rtpmp4gdepay->auxiliarydatasizelength);
499 /* convert to bytes */
500 aux_size = (aux_size + 7) / 8;
501 /* AU data then follows auxiliary data */
502 if (payload_AU_size < aux_size)
504 payload_AU += aux_size;
505 payload_AU_size -= aux_size;
508 /* point the bitstream parser to the first AU header bit */
509 gst_bs_parse_init (&bs, payload, payload_len);
510 AU_index = AU_index_delta = 0;
512 for (i = 0; i < num_AU_headers && payload_AU_size > 0; i++) {
514 * +---------------------------------------+
516 * +---------------------------------------+
517 * | AU-Index / AU-Index-delta |
518 * +---------------------------------------+
520 * +---------------------------------------+
522 * +---------------------------------------+
524 * +---------------------------------------+
526 * +---------------------------------------+
528 * +---------------------------------------+
530 * +---------------------------------------+
532 AU_size = gst_bs_parse_read (&bs, rtpmp4gdepay->sizelength);
534 /* calculate the AU_index, which is only on the first AU of the packet
535 * and the AU_index_delta on the other AUs. This will be used to
536 * reconstruct the AU ordering when interleaving. */
538 AU_index = gst_bs_parse_read (&bs, rtpmp4gdepay->indexlength);
540 GST_DEBUG_OBJECT (rtpmp4gdepay, "AU index %u", AU_index);
542 if (AU_index == 0 && rtpmp4gdepay->prev_AU_index == 0) {
546 /* if we see two consecutive packets with AU_index of 0, we can
547 * assume we have constantDuration packets. Since we don't have
548 * the index we must use the AU duration to calculate the
549 * index. Get the diff between the timestamps first, this can be
550 * positive or negative. */
551 if (rtpmp4gdepay->prev_rtptime <= rtptime)
552 diff = rtptime - rtpmp4gdepay->prev_rtptime;
554 diff = -(rtpmp4gdepay->prev_rtptime - rtptime);
556 /* if no constantDuration was given, make one */
557 if (rtpmp4gdepay->constantDuration != 0) {
558 cd = rtpmp4gdepay->constantDuration;
559 GST_DEBUG_OBJECT (depayload, "using constantDuration %d", cd);
560 } else if (rtpmp4gdepay->prev_AU_num > 0) {
561 /* use number of packets and of previous frame */
562 cd = diff / rtpmp4gdepay->prev_AU_num;
563 GST_DEBUG_OBJECT (depayload, "guessing constantDuration %d", cd);
565 /* assume this frame has the same number of packets as the
567 cd = diff / num_AU_headers;
568 GST_DEBUG_OBJECT (depayload, "guessing constantDuration %d", cd);
572 /* get the number of packets by dividing with the duration */
578 rtpmp4gdepay->last_AU_index += diff;
579 rtpmp4gdepay->prev_AU_index = AU_index;
581 AU_index = rtpmp4gdepay->last_AU_index;
583 GST_DEBUG_OBJECT (rtpmp4gdepay, "diff %d, AU index %u", diff,
586 rtpmp4gdepay->prev_AU_index = AU_index;
587 rtpmp4gdepay->last_AU_index = AU_index;
590 /* keep track of the higest AU_index */
591 if (rtpmp4gdepay->max_AU_index != -1
592 && rtpmp4gdepay->max_AU_index <= AU_index) {
593 GST_DEBUG_OBJECT (rtpmp4gdepay, "new interleave group, flushing");
594 /* a new interleave group started, flush */
595 gst_rtp_mp4g_depay_flush_queue (rtpmp4gdepay);
597 if (G_UNLIKELY (!rtpmp4gdepay->maxDisplacement &&
598 rtpmp4gdepay->max_AU_index != -1
599 && rtpmp4gdepay->max_AU_index >= AU_index)) {
602 /* some broken non-interleaved streams have AU-index jumping around
603 * all over the place, apparently assuming receiver disregards */
604 GST_DEBUG_OBJECT (rtpmp4gdepay, "non-interleaved broken AU indices;"
605 " forcing continuous flush");
606 /* reset AU to avoid repeated DISCONT in such case */
607 outbuf = g_queue_peek_head (rtpmp4gdepay->packets);
608 if (G_LIKELY (outbuf)) {
609 rtpmp4gdepay->next_AU_index = GST_BUFFER_OFFSET (outbuf);
610 gst_rtp_mp4g_depay_flush_queue (rtpmp4gdepay);
613 rtpmp4gdepay->prev_rtptime = rtptime;
614 rtpmp4gdepay->prev_AU_num = num_AU_headers;
617 gst_bs_parse_read (&bs, rtpmp4gdepay->indexdeltalength);
618 AU_index += AU_index_delta + 1;
620 /* keep track of highest AU_index */
621 if (rtpmp4gdepay->max_AU_index == -1
622 || AU_index > rtpmp4gdepay->max_AU_index)
623 rtpmp4gdepay->max_AU_index = AU_index;
625 /* the presentation time offset, a 2s-complement value, we need this to
626 * calculate the timestamp on the output packet. */
627 if (rtpmp4gdepay->ctsdeltalength > 0) {
628 if (gst_bs_parse_read (&bs, 1))
629 gst_bs_parse_read (&bs, rtpmp4gdepay->ctsdeltalength);
631 /* the decoding time offset, a 2s-complement value */
632 if (rtpmp4gdepay->dtsdeltalength > 0) {
633 if (gst_bs_parse_read (&bs, 1))
634 gst_bs_parse_read (&bs, rtpmp4gdepay->dtsdeltalength);
636 /* RAP-flag to indicate that the AU contains a keyframe */
637 if (rtpmp4gdepay->randomaccessindication)
638 gst_bs_parse_read (&bs, 1);
640 if (rtpmp4gdepay->streamstateindication > 0)
641 gst_bs_parse_read (&bs, rtpmp4gdepay->streamstateindication);
643 GST_DEBUG_OBJECT (rtpmp4gdepay, "size %d, index %d, delta %d", AU_size,
644 AU_index, AU_index_delta);
646 /* fragmented pakets have the AU_size set to the size of the
647 * unfragmented AU. */
648 if (AU_size > payload_AU_size)
649 AU_size = payload_AU_size;
651 /* collect stuff in the adapter, strip header from payload and push in
654 gst_rtp_buffer_get_payload_subbuffer (&rtp, payload_AU, AU_size);
655 gst_adapter_push (rtpmp4gdepay->adapter, outbuf);
660 /* packet is complete, flush */
661 avail = gst_adapter_available (rtpmp4gdepay->adapter);
663 outbuf = gst_adapter_take_buffer (rtpmp4gdepay->adapter, avail);
665 /* copy some of the fields we calculated above on the buffer. We also
666 * copy the AU_index so that we can sort the packets in our queue. */
667 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
668 GST_BUFFER_OFFSET (outbuf) = AU_index;
670 /* make sure we don't use the timestamp again for other AUs in this
674 GST_DEBUG_OBJECT (depayload, "pushing buffer of size %d",
675 gst_buffer_get_size (outbuf));
677 gst_rtp_mp4g_depay_queue (rtpmp4gdepay, outbuf);
680 payload_AU += AU_size;
681 payload_AU_size -= AU_size;
684 /* push complete buffer in adapter */
685 outbuf = gst_rtp_buffer_get_payload_subbuffer (&rtp, 0, payload_len);
686 gst_adapter_push (rtpmp4gdepay->adapter, outbuf);
688 /* if this was the last packet of the VOP, create and push a buffer */
692 avail = gst_adapter_available (rtpmp4gdepay->adapter);
694 outbuf = gst_adapter_take_buffer (rtpmp4gdepay->adapter, avail);
696 GST_DEBUG ("gst_rtp_mp4g_depay_chain: pushing buffer of size %d",
697 gst_buffer_get_size (outbuf));
699 gst_rtp_buffer_unmap (&rtp);
705 gst_rtp_buffer_unmap (&rtp);
711 GST_ELEMENT_WARNING (rtpmp4gdepay, STREAM, DECODE,
712 ("Packet payload was too short."), (NULL));
713 gst_rtp_buffer_unmap (&rtp);
719 gst_rtp_mp4g_depay_handle_event (GstBaseRTPDepayload * filter, GstEvent * event)
722 GstRtpMP4GDepay *rtpmp4gdepay;
724 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (filter);
726 switch (GST_EVENT_TYPE (event)) {
727 case GST_EVENT_FLUSH_STOP:
728 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
735 GST_BASE_RTP_DEPAYLOAD_CLASS (parent_class)->handle_event (filter, event);
740 static GstStateChangeReturn
741 gst_rtp_mp4g_depay_change_state (GstElement * element,
742 GstStateChange transition)
744 GstRtpMP4GDepay *rtpmp4gdepay;
745 GstStateChangeReturn ret;
747 rtpmp4gdepay = GST_RTP_MP4G_DEPAY (element);
749 switch (transition) {
750 case GST_STATE_CHANGE_READY_TO_PAUSED:
751 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
757 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
759 switch (transition) {
760 case GST_STATE_CHANGE_PAUSED_TO_READY:
761 gst_rtp_mp4g_depay_reset (rtpmp4gdepay);
770 gst_rtp_mp4g_depay_plugin_init (GstPlugin * plugin)
772 return gst_element_register (plugin, "rtpmp4gdepay",
773 GST_RANK_SECONDARY, GST_TYPE_RTP_MP4G_DEPAY);