1 /* OGG muxer plugin for GStreamer
2 * Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
3 * Copyright (C) 2006 Thomas Vander Stichele <thomas at apestaart dot org>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-oggmux
23 * @see_also: <link linkend="gst-plugins-base-plugins-deoggmux">oggdemux</link>
25 * This element merges streams (audio and video) into ogg files.
28 * <title>Example pipelines</title>
30 * gst-launch v4l2src num-buffers=500 ! video/x-raw-yuv,width=320,height=240 ! ffmpegcolorspace ! theoraenc ! oggmux ! filesink location=video.ogg
31 * ]| Encodes a video stream captured from a v4l2-compatible camera to Ogg/Theora
32 * (the encoding will stop automatically after 500 frames)
35 * Last reviewed on 2008-02-06 (0.10.17)
43 #include <gst/base/gstcollectpads.h>
45 #include "gstoggmux.h"
47 /* memcpy - if someone knows a way to get rid of it, please speak up
48 * note: the ogg docs even say you need this... */
51 #include <stdlib.h> /* rand, srand, atoi */
53 GST_DEBUG_CATEGORY_STATIC (gst_ogg_mux_debug);
54 #define GST_CAT_DEFAULT gst_ogg_mux_debug
56 /* This isn't generally what you'd want with an end-time macro, because
57 technically the end time of a buffer with invalid duration is invalid. But
58 for sorting ogg pages this is what we want. */
59 #define GST_BUFFER_END_TIME(buf) \
60 (GST_BUFFER_DURATION_IS_VALID (buf) \
61 ? GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf) \
62 : GST_BUFFER_TIMESTAMP (buf))
64 #define GST_GP_FORMAT "[gp %8" G_GINT64_FORMAT "]"
65 #define GST_GP_CAST(_gp) ((gint64) _gp)
69 GST_OGG_FLAG_BOS = GST_ELEMENT_FLAG_LAST,
74 /* elementfactory information */
75 static const GstElementDetails gst_ogg_mux_details =
76 GST_ELEMENT_DETAILS ("Ogg muxer",
78 "mux ogg streams (info about ogg: http://xiph.org)",
79 "Wim Taymans <wim@fluendo.com>");
81 /* OggMux signals and args */
88 /* set to 0.5 seconds by default */
89 #define DEFAULT_MAX_DELAY G_GINT64_CONSTANT(500000000)
90 #define DEFAULT_MAX_PAGE_DELAY G_GINT64_CONSTANT(500000000)
98 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
101 GST_STATIC_CAPS ("application/ogg")
104 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
107 GST_STATIC_CAPS ("video/x-theora; "
108 "audio/x-vorbis; audio/x-flac; audio/x-speex; audio/x-celt; "
109 "application/x-ogm-video; application/x-ogm-audio; video/x-dirac; "
110 "video/x-smoke; text/x-cmml, encoded = (boolean) TRUE; "
111 "subtitle/x-kate; application/x-kate")
114 static void gst_ogg_mux_base_init (gpointer g_class);
115 static void gst_ogg_mux_class_init (GstOggMuxClass * klass);
116 static void gst_ogg_mux_init (GstOggMux * ogg_mux);
117 static void gst_ogg_mux_finalize (GObject * object);
120 gst_ogg_mux_collected (GstCollectPads * pads, GstOggMux * ogg_mux);
121 static gboolean gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event);
122 static GstPad *gst_ogg_mux_request_new_pad (GstElement * element,
123 GstPadTemplate * templ, const gchar * name);
124 static void gst_ogg_mux_release_pad (GstElement * element, GstPad * pad);
126 static void gst_ogg_mux_set_property (GObject * object,
127 guint prop_id, const GValue * value, GParamSpec * pspec);
128 static void gst_ogg_mux_get_property (GObject * object,
129 guint prop_id, GValue * value, GParamSpec * pspec);
130 static GstStateChangeReturn gst_ogg_mux_change_state (GstElement * element,
131 GstStateChange transition);
133 static GstElementClass *parent_class = NULL;
135 /*static guint gst_ogg_mux_signals[LAST_SIGNAL] = { 0 }; */
138 gst_ogg_mux_get_type (void)
140 static GType ogg_mux_type = 0;
142 if (G_UNLIKELY (ogg_mux_type == 0)) {
143 static const GTypeInfo ogg_mux_info = {
144 sizeof (GstOggMuxClass),
145 gst_ogg_mux_base_init,
147 (GClassInitFunc) gst_ogg_mux_class_init,
152 (GInstanceInitFunc) gst_ogg_mux_init,
154 static const GInterfaceInfo preset_info = {
161 g_type_register_static (GST_TYPE_ELEMENT, "GstOggMux", &ogg_mux_info,
164 g_type_add_interface_static (ogg_mux_type, GST_TYPE_PRESET, &preset_info);
170 gst_ogg_mux_base_init (gpointer g_class)
172 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
174 gst_element_class_add_pad_template (element_class,
175 gst_static_pad_template_get (&src_factory));
176 gst_element_class_add_pad_template (element_class,
177 gst_static_pad_template_get (&sink_factory));
179 gst_element_class_set_details (element_class, &gst_ogg_mux_details);
183 gst_ogg_mux_class_init (GstOggMuxClass * klass)
185 GObjectClass *gobject_class;
186 GstElementClass *gstelement_class;
188 gobject_class = (GObjectClass *) klass;
189 gstelement_class = (GstElementClass *) klass;
191 parent_class = g_type_class_peek_parent (klass);
193 gobject_class->finalize = gst_ogg_mux_finalize;
194 gobject_class->get_property = gst_ogg_mux_get_property;
195 gobject_class->set_property = gst_ogg_mux_set_property;
197 gstelement_class->request_new_pad = gst_ogg_mux_request_new_pad;
198 gstelement_class->release_pad = gst_ogg_mux_release_pad;
200 g_object_class_install_property (gobject_class, ARG_MAX_DELAY,
201 g_param_spec_uint64 ("max-delay", "Max delay",
202 "Maximum delay in multiplexing streams", 0, G_MAXUINT64,
204 (GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
205 g_object_class_install_property (gobject_class, ARG_MAX_PAGE_DELAY,
206 g_param_spec_uint64 ("max-page-delay", "Max page delay",
207 "Maximum delay for sending out a page", 0, G_MAXUINT64,
208 DEFAULT_MAX_PAGE_DELAY,
209 (GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
211 gstelement_class->change_state = gst_ogg_mux_change_state;
216 static const GstEventMask *
217 gst_ogg_mux_get_sink_event_masks (GstPad * pad)
219 static const GstEventMask gst_ogg_mux_sink_event_masks[] = {
221 {GST_EVENT_DISCONTINUOUS, 0},
225 return gst_ogg_mux_sink_event_masks;
230 gst_ogg_mux_clear (GstOggMux * ogg_mux)
232 ogg_mux->pulling = NULL;
233 ogg_mux->need_headers = TRUE;
234 ogg_mux->delta_pad = NULL;
236 ogg_mux->next_ts = 0;
237 ogg_mux->last_ts = GST_CLOCK_TIME_NONE;
241 gst_ogg_mux_init (GstOggMux * ogg_mux)
243 GstElementClass *klass = GST_ELEMENT_GET_CLASS (ogg_mux);
246 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
248 gst_pad_set_event_function (ogg_mux->srcpad, gst_ogg_mux_handle_src_event);
249 gst_element_add_pad (GST_ELEMENT (ogg_mux), ogg_mux->srcpad);
251 GST_OBJECT_FLAG_SET (GST_ELEMENT (ogg_mux), GST_OGG_FLAG_BOS);
253 /* seed random number generator for creation of serial numbers */
256 ogg_mux->collect = gst_collect_pads_new ();
257 gst_collect_pads_set_function (ogg_mux->collect,
258 (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_ogg_mux_collected),
261 ogg_mux->max_delay = DEFAULT_MAX_DELAY;
262 ogg_mux->max_page_delay = DEFAULT_MAX_PAGE_DELAY;
264 gst_ogg_mux_clear (ogg_mux);
268 gst_ogg_mux_finalize (GObject * object)
272 ogg_mux = GST_OGG_MUX (object);
274 if (ogg_mux->collect) {
275 gst_object_unref (ogg_mux->collect);
276 ogg_mux->collect = NULL;
279 G_OBJECT_CLASS (parent_class)->finalize (object);
283 gst_ogg_mux_ogg_pad_destroy_notify (GstCollectData * data)
285 GstOggPad *oggpad = (GstOggPad *) data;
288 ogg_stream_clear (&oggpad->stream);
290 if (oggpad->pagebuffers) {
291 while ((buf = g_queue_pop_head (oggpad->pagebuffers)) != NULL) {
292 gst_buffer_unref (buf);
294 g_queue_free (oggpad->pagebuffers);
295 oggpad->pagebuffers = NULL;
299 static GstPadLinkReturn
300 gst_ogg_mux_sinkconnect (GstPad * pad, GstPad * peer)
304 ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
306 GST_DEBUG_OBJECT (ogg_mux, "sinkconnect triggered on %s", GST_PAD_NAME (pad));
308 gst_object_unref (ogg_mux);
310 return GST_PAD_LINK_OK;
314 gst_ogg_mux_sink_event (GstPad * pad, GstEvent * event)
316 GstOggMux *ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
317 GstOggPad *ogg_pad = (GstOggPad *) gst_pad_get_element_private (pad);
320 GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
321 GST_DEBUG_PAD_NAME (pad));
323 switch (GST_EVENT_TYPE (event)) {
324 case GST_EVENT_NEWSEGMENT:
325 /* We don't support NEWSEGMENT events */
326 gst_event_unref (event);
334 /* now GstCollectPads can take care of the rest, e.g. EOS */
336 ret = ogg_pad->collect_event (pad, event);
338 gst_object_unref (ogg_mux);
343 gst_ogg_mux_request_new_pad (GstElement * element,
344 GstPadTemplate * templ, const gchar * req_name)
348 GstElementClass *klass;
350 g_return_val_if_fail (templ != NULL, NULL);
352 if (templ->direction != GST_PAD_SINK)
353 goto wrong_direction;
355 g_return_val_if_fail (GST_IS_OGG_MUX (element), NULL);
356 ogg_mux = GST_OGG_MUX (element);
358 klass = GST_ELEMENT_GET_CLASS (element);
360 if (templ != gst_element_class_get_pad_template (klass, "sink_%d"))
367 if (req_name == NULL || strlen (req_name) < 6) {
368 /* no name given when requesting the pad, use random serial number */
371 /* parse serial number from requested padname */
372 serial = atoi (&req_name[5]);
374 /* create new pad with the name */
375 GST_DEBUG_OBJECT (ogg_mux, "Creating new pad for serial %d", serial);
376 name = g_strdup_printf ("sink_%d", serial);
377 newpad = gst_pad_new_from_template (templ, name);
380 /* construct our own wrapper data structure for the pad to
381 * keep track of its status */
385 oggpad = (GstOggPad *)
386 gst_collect_pads_add_pad_full (ogg_mux->collect, newpad,
387 sizeof (GstOggPad), gst_ogg_mux_ogg_pad_destroy_notify);
388 ogg_mux->active_pads++;
390 oggpad->serial = serial;
391 ogg_stream_init (&oggpad->stream, serial);
392 oggpad->packetno = 0;
395 /* we assume there will be some control data first for this pad */
396 oggpad->state = GST_OGG_PAD_STATE_CONTROL;
397 oggpad->new_page = TRUE;
398 oggpad->first_delta = FALSE;
399 oggpad->prev_delta = FALSE;
400 oggpad->pagebuffers = g_queue_new ();
402 oggpad->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (newpad);
403 gst_pad_set_event_function (newpad,
404 GST_DEBUG_FUNCPTR (gst_ogg_mux_sink_event));
408 /* setup some pad functions */
409 gst_pad_set_link_function (newpad, gst_ogg_mux_sinkconnect);
411 /* dd the pad to the element */
412 gst_element_add_pad (element, newpad);
419 g_warning ("ogg_mux: request pad that is not a SINK pad\n");
424 g_warning ("ogg_mux: this is not our template!\n");
430 gst_ogg_mux_release_pad (GstElement * element, GstPad * pad)
434 ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
436 gst_collect_pads_remove_pad (ogg_mux->collect, pad);
437 gst_element_remove_pad (element, pad);
439 gst_object_unref (ogg_mux);
444 gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event)
448 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
452 /* disable seeking for now */
458 return gst_pad_event_default (pad, event);
462 gst_ogg_mux_buffer_from_page (GstOggMux * mux, ogg_page * page, gboolean delta)
466 /* allocate space for header and body */
467 buffer = gst_buffer_new_and_alloc (page->header_len + page->body_len);
468 memcpy (GST_BUFFER_DATA (buffer), page->header, page->header_len);
469 memcpy (GST_BUFFER_DATA (buffer) + page->header_len,
470 page->body, page->body_len);
472 /* Here we set granulepos as our OFFSET_END to give easy direct access to
473 * this value later. Before we push it, we reset this to OFFSET + SIZE
474 * (see gst_ogg_mux_push_buffer). */
475 GST_BUFFER_OFFSET_END (buffer) = ogg_page_granulepos (page);
477 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
479 GST_LOG_OBJECT (mux, GST_GP_FORMAT
480 " created buffer %p from ogg page",
481 GST_GP_CAST (ogg_page_granulepos (page)), buffer);
487 gst_ogg_mux_push_buffer (GstOggMux * mux, GstBuffer * buffer)
491 /* fix up OFFSET and OFFSET_END again */
492 GST_BUFFER_OFFSET (buffer) = mux->offset;
493 mux->offset += GST_BUFFER_SIZE (buffer);
494 GST_BUFFER_OFFSET_END (buffer) = mux->offset;
496 /* Ensure we have monotonically increasing timestamps in the output. */
497 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
498 if (mux->last_ts != GST_CLOCK_TIME_NONE &&
499 GST_BUFFER_TIMESTAMP (buffer) < mux->last_ts)
500 GST_BUFFER_TIMESTAMP (buffer) = mux->last_ts;
502 mux->last_ts = GST_BUFFER_TIMESTAMP (buffer);
505 caps = gst_pad_get_negotiated_caps (mux->srcpad);
506 gst_buffer_set_caps (buffer, caps);
508 gst_caps_unref (caps);
510 return gst_pad_push (mux->srcpad, buffer);
513 /* if all queues have at least one page, dequeue the page with the lowest
516 gst_ogg_mux_dequeue_page (GstOggMux * mux, GstFlowReturn * flowret)
519 GstOggPad *opad = NULL; /* "oldest" pad */
520 GstClockTime oldest = GST_CLOCK_TIME_NONE;
521 GstBuffer *buf = NULL;
522 gboolean ret = FALSE;
524 *flowret = GST_FLOW_OK;
526 walk = mux->collect->data;
528 GstOggPad *pad = (GstOggPad *) walk->data;
530 /* We need each queue to either be at EOS, or have one or more pages
531 * available with a set granulepos (i.e. not -1), otherwise we don't have
532 * enough data yet to determine which stream needs to go next for correct
534 if (pad->pagebuffers->length == 0) {
536 GST_LOG_OBJECT (pad->collect.pad,
537 "pad is EOS, skipping for dequeue decision");
539 GST_LOG_OBJECT (pad->collect.pad,
540 "no pages in this queue, can't dequeue");
544 /* We then need to check for a non-negative granulepos */
546 gboolean valid = FALSE;
548 for (i = 0; i < pad->pagebuffers->length; i++) {
549 buf = g_queue_peek_nth (pad->pagebuffers, i);
550 /* Here we check the OFFSET_END, which is actually temporarily the
551 * granulepos value for this buffer */
552 if (GST_BUFFER_OFFSET_END (buf) != -1) {
558 GST_LOG_OBJECT (pad->collect.pad,
559 "No page timestamps in queue, can't dequeue");
564 walk = g_slist_next (walk);
567 walk = mux->collect->data;
569 GstOggPad *pad = (GstOggPad *) walk->data;
571 /* any page with a granulepos of -1 can be pushed immediately.
572 * TODO: it CAN be, but it seems silly to do so? */
573 buf = g_queue_peek_head (pad->pagebuffers);
574 while (buf && GST_BUFFER_OFFSET_END (buf) == -1) {
575 GST_LOG_OBJECT (pad->collect.pad, "[gp -1] pushing page");
576 g_queue_pop_head (pad->pagebuffers);
577 *flowret = gst_ogg_mux_push_buffer (mux, buf);
578 buf = g_queue_peek_head (pad->pagebuffers);
583 /* if no oldest buffer yet, take this one */
584 if (oldest == GST_CLOCK_TIME_NONE) {
585 GST_LOG_OBJECT (mux, "no oldest yet, taking buffer %p from pad %"
586 GST_PTR_FORMAT " with gp time %" GST_TIME_FORMAT,
587 buf, pad->collect.pad, GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
588 oldest = GST_BUFFER_OFFSET (buf);
591 /* if we have an oldest, compare with this one */
592 if (GST_BUFFER_OFFSET (buf) < oldest) {
593 GST_LOG_OBJECT (mux, "older buffer %p, taking from pad %"
594 GST_PTR_FORMAT " with gp time %" GST_TIME_FORMAT,
595 buf, pad->collect.pad, GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
596 oldest = GST_BUFFER_OFFSET (buf);
601 walk = g_slist_next (walk);
604 if (oldest != GST_CLOCK_TIME_NONE) {
606 buf = g_queue_pop_head (opad->pagebuffers);
607 GST_LOG_OBJECT (opad->collect.pad,
608 GST_GP_FORMAT " pushing oldest page buffer %p (granulepos time %"
609 GST_TIME_FORMAT ")", GST_BUFFER_OFFSET_END (buf), buf,
610 GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
611 *flowret = gst_ogg_mux_push_buffer (mux, buf);
618 /* put the given ogg page on a per-pad queue, timestamping it correctly.
619 * after that, dequeue and push as many pages as possible.
620 * Caller should make sure:
621 * pad->timestamp was set with the timestamp of the first packet put
623 * pad->timestamp_end was set with the timestamp + duration of the last packet
625 * pad->gp_time was set with the time matching the gp of the last
626 * packet put on the page
628 * will also reset timestamp and timestamp_end, so caller func can restart
632 gst_ogg_mux_pad_queue_page (GstOggMux * mux, GstOggPad * pad, ogg_page * page,
636 GstBuffer *buffer = gst_ogg_mux_buffer_from_page (mux, page, delta);
638 /* take the timestamp of the first packet on this page */
639 GST_BUFFER_TIMESTAMP (buffer) = pad->timestamp;
640 GST_BUFFER_DURATION (buffer) = pad->timestamp_end - pad->timestamp;
641 /* take the gp time of the last completed packet on this page */
642 GST_BUFFER_OFFSET (buffer) = pad->gp_time;
644 /* the next page will start where the current page's end time leaves off */
645 pad->timestamp = pad->timestamp_end;
647 g_queue_push_tail (pad->pagebuffers, buffer);
648 GST_LOG_OBJECT (pad->collect.pad, GST_GP_FORMAT
649 " queued buffer page %p (gp time %"
650 GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT
651 "), %d page buffers queued", GST_GP_CAST (ogg_page_granulepos (page)),
652 buffer, GST_TIME_ARGS (GST_BUFFER_OFFSET (buffer)),
653 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
654 g_queue_get_length (pad->pagebuffers));
656 while (gst_ogg_mux_dequeue_page (mux, &ret)) {
657 if (ret != GST_FLOW_OK)
665 * Given two pads, compare the buffers queued on it.
667 * 0 if they have an equal priority
668 * -1 if the first is better
669 * 1 if the second is better
670 * Priority decided by: a) validity, b) older timestamp, c) smaller number
674 gst_ogg_mux_compare_pads (GstOggMux * ogg_mux, GstOggPad * first,
677 guint64 firsttime, secondtime;
679 /* if the first pad doesn't contain anything or is even NULL, return
680 * the second pad as best candidate and vice versa */
681 if (first == NULL || (first->buffer == NULL && first->next_buffer == NULL))
683 if (second == NULL || (second->buffer == NULL && second->next_buffer == NULL))
686 /* no timestamp on first buffer, it must go first */
688 firsttime = GST_BUFFER_TIMESTAMP (first->buffer);
690 firsttime = GST_BUFFER_TIMESTAMP (first->next_buffer);
691 if (firsttime == GST_CLOCK_TIME_NONE)
694 /* no timestamp on second buffer, it must go first */
696 secondtime = GST_BUFFER_TIMESTAMP (second->buffer);
698 secondtime = GST_BUFFER_TIMESTAMP (second->next_buffer);
699 if (secondtime == GST_CLOCK_TIME_NONE)
702 /* first buffer has higher timestamp, second one should go first */
703 if (secondtime < firsttime)
705 /* second buffer has higher timestamp, first one should go first */
706 else if (secondtime > firsttime)
709 /* buffers with equal timestamps, prefer the pad that has the
710 * least number of pages muxed */
711 if (second->pageno < first->pageno)
713 else if (second->pageno > first->pageno)
717 /* same priority if all of the above failed */
721 /* make sure at least one buffer is queued on all pads, two if possible
723 * if pad->buffer == NULL, pad->next_buffer != NULL, then
724 * we do not know if the buffer is the last or not
725 * if pad->buffer != NULL, pad->next_buffer != NULL, then
726 * pad->buffer is not the last buffer for the pad
727 * if pad->buffer != NULL, pad->next_buffer == NULL, then
728 * pad->buffer if the last buffer for the pad
730 * returns a pointer to an oggpad that holds the best buffer, or
731 * NULL when no pad was usable. "best" means the buffer marked
732 * with the lowest timestamp. If best->buffer == NULL then nothing
733 * should be done until more data arrives */
735 gst_ogg_mux_queue_pads (GstOggMux * ogg_mux)
737 GstOggPad *bestpad = NULL, *still_hungry = NULL;
740 /* try to make sure we have a buffer from each usable pad first */
741 walk = ogg_mux->collect->data;
744 GstCollectData *data;
746 data = (GstCollectData *) walk->data;
747 pad = (GstOggPad *) data;
749 walk = g_slist_next (walk);
751 GST_LOG_OBJECT (data->pad, "looking at pad for buffer");
753 /* try to get a new buffer for this pad if needed and possible */
754 if (pad->buffer == NULL) {
758 /* shift the buffer along if needed (it's okay if next_buffer is NULL) */
759 if (pad->buffer == NULL) {
760 GST_LOG_OBJECT (data->pad, "shifting buffer %" GST_PTR_FORMAT,
762 pad->buffer = pad->next_buffer;
763 pad->next_buffer = NULL;
766 buf = gst_collect_pads_pop (ogg_mux->collect, data);
767 GST_LOG_OBJECT (data->pad, "popped buffer %" GST_PTR_FORMAT, buf);
769 /* On EOS we get a NULL buffer */
771 if (ogg_mux->delta_pad == NULL &&
772 GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT))
773 ogg_mux->delta_pad = pad;
775 incaps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
776 /* if we need headers */
777 if (pad->state == GST_OGG_PAD_STATE_CONTROL) {
778 /* and we have one */
780 GST_DEBUG_OBJECT (ogg_mux,
781 "got incaps buffer in control state, ignoring");
783 gst_buffer_unref (buf);
786 GST_DEBUG_OBJECT (ogg_mux,
787 "got data buffer in control state, switching " "to data mode");
788 /* this is a data buffer so switch to data state */
789 pad->state = GST_OGG_PAD_STATE_DATA;
793 GST_DEBUG_OBJECT (data->pad, "EOS on pad");
798 /* it's no longer active */
799 ogg_mux->active_pads--;
801 /* Just gone to EOS. Flush existing page(s) */
804 while (ogg_stream_flush (&pad->stream, &page)) {
805 /* Place page into the per-pad queue */
806 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
808 /* increment the page number counter */
810 /* mark other pages as delta */
811 pad->first_delta = TRUE;
816 pad->next_buffer = buf;
819 /* we should have a buffer now, see if it is the best pad to
821 if (pad->buffer || pad->next_buffer) {
822 if (gst_ogg_mux_compare_pads (ogg_mux, bestpad, pad) > 0) {
823 GST_LOG_OBJECT (data->pad,
824 "new best pad, with buffers %" GST_PTR_FORMAT
825 " and %" GST_PTR_FORMAT, pad->buffer, pad->next_buffer);
829 } else if (!pad->eos) {
830 GST_LOG_OBJECT (data->pad, "hungry pad");
836 /* drop back into collectpads... */
843 gst_ogg_mux_get_headers (GstOggPad * pad)
846 GstStructure *structure;
850 thepad = pad->collect.pad;
852 GST_LOG_OBJECT (thepad, "getting headers");
854 caps = gst_pad_get_negotiated_caps (thepad);
856 const GValue *streamheader;
858 structure = gst_caps_get_structure (caps, 0);
859 streamheader = gst_structure_get_value (structure, "streamheader");
860 if (streamheader != NULL) {
861 GST_LOG_OBJECT (thepad, "got header");
862 if (G_VALUE_TYPE (streamheader) == GST_TYPE_ARRAY) {
863 GArray *bufarr = g_value_peek_pointer (streamheader);
866 GST_LOG_OBJECT (thepad, "got fixed list");
868 for (i = 0; i < bufarr->len; i++) {
869 GValue *bufval = &g_array_index (bufarr, GValue, i);
871 GST_LOG_OBJECT (thepad, "item %d", i);
872 if (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER) {
873 GstBuffer *buf = g_value_peek_pointer (bufval);
875 GST_LOG_OBJECT (thepad, "adding item %d to header list", i);
877 gst_buffer_ref (buf);
878 res = g_list_append (res, buf);
882 GST_LOG_OBJECT (thepad, "streamheader is not fixed list");
884 } else if (gst_structure_has_name (structure, "video/x-dirac")) {
885 res = g_list_append (res, pad->buffer);
886 pad->buffer = pad->next_buffer;
887 pad->next_buffer = NULL;
888 pad->always_flush_page = TRUE;
890 GST_LOG_OBJECT (thepad, "caps don't have streamheader");
892 gst_caps_unref (caps);
894 GST_LOG_OBJECT (thepad, "got empty caps as negotiated format");
900 gst_ogg_mux_set_header_on_caps (GstCaps * caps, GList * buffers)
902 GstStructure *structure;
903 GValue array = { 0 };
904 GList *walk = buffers;
906 caps = gst_caps_make_writable (caps);
908 structure = gst_caps_get_structure (caps, 0);
910 /* put buffers in a fixed list */
911 g_value_init (&array, GST_TYPE_ARRAY);
914 GstBuffer *buf = GST_BUFFER (walk->data);
916 GValue value = { 0 };
921 GST_LOG ("Setting IN_CAPS on buffer of length %d", GST_BUFFER_SIZE (buf));
922 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
924 g_value_init (&value, GST_TYPE_BUFFER);
925 copy = gst_buffer_copy (buf);
926 gst_value_set_buffer (&value, copy);
927 gst_buffer_unref (copy);
928 gst_value_array_append_value (&array, &value);
929 g_value_unset (&value);
931 gst_structure_set_value (structure, "streamheader", &array);
932 g_value_unset (&array);
938 * For each pad we need to write out one (small) header in one
939 * page that allows decoders to identify the type of the stream.
940 * After that we need to write out all extra info for the decoders.
941 * In the case of a codec that also needs data as configuration, we can
942 * find that info in the streamcaps.
943 * After writing the headers we must start a new page for the data.
946 gst_ogg_mux_send_headers (GstOggMux * mux)
949 GList *hbufs, *hwalk;
956 GST_LOG_OBJECT (mux, "collecting headers");
958 walk = mux->collect->data;
963 pad = (GstOggPad *) walk->data;
964 thepad = pad->collect.pad;
966 walk = g_slist_next (walk);
968 GST_LOG_OBJECT (mux, "looking at pad %s:%s", GST_DEBUG_PAD_NAME (thepad));
970 /* if the pad has no buffer, we don't care */
971 if (pad->buffer == NULL && pad->next_buffer == NULL)
974 /* now figure out the headers */
975 pad->headers = gst_ogg_mux_get_headers (pad);
978 GST_LOG_OBJECT (mux, "creating BOS pages");
979 walk = mux->collect->data;
987 GstStructure *structure;
990 pad = (GstOggPad *) walk->data;
991 thepad = pad->collect.pad;
992 caps = gst_pad_get_negotiated_caps (thepad);
993 structure = gst_caps_get_structure (caps, 0);
999 GST_LOG_OBJECT (thepad, "looping over headers");
1002 buf = GST_BUFFER (pad->headers->data);
1003 pad->headers = g_list_remove (pad->headers, buf);
1004 } else if (pad->buffer) {
1006 gst_buffer_ref (buf);
1007 } else if (pad->next_buffer) {
1008 buf = pad->next_buffer;
1009 gst_buffer_ref (buf);
1011 /* fixme -- should be caught in the previous list traversal. */
1012 GST_OBJECT_LOCK (pad);
1013 g_critical ("No headers or buffers on pad %s:%s",
1014 GST_DEBUG_PAD_NAME (pad));
1015 GST_OBJECT_UNLOCK (pad);
1019 /* create a packet from the buffer */
1020 packet.packet = GST_BUFFER_DATA (buf);
1021 packet.bytes = GST_BUFFER_SIZE (buf);
1022 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1023 if (packet.granulepos == -1)
1024 packet.granulepos = 0;
1025 /* mark BOS and packet number */
1026 packet.b_o_s = (pad->packetno == 0);
1027 packet.packetno = pad->packetno++;
1031 /* swap the packet in */
1032 ogg_stream_packetin (&pad->stream, &packet);
1033 gst_buffer_unref (buf);
1035 GST_LOG_OBJECT (thepad, "flushing out BOS page");
1036 if (!ogg_stream_flush (&pad->stream, &page))
1037 g_critical ("Could not flush BOS page");
1039 hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1041 GST_LOG_OBJECT (mux, "swapped out page with mime type %s",
1042 gst_structure_get_name (structure));
1044 /* quick hack: put Theora and Dirac video pages at the front.
1045 * Ideally, we would have a settable enum for which Ogg
1046 * profile we work with, and order based on that.
1047 * (FIXME: if there is more than one video stream, shouldn't we only put
1048 * one's BOS into the first page, followed by an audio stream's BOS, and
1049 * only then followed by the remaining video and audio streams?) */
1050 if (gst_structure_has_name (structure, "video/x-theora")) {
1051 GST_DEBUG_OBJECT (thepad, "putting %s page at the front", "Theora");
1052 hbufs = g_list_prepend (hbufs, hbuf);
1053 } else if (gst_structure_has_name (structure, "video/x-dirac")) {
1054 GST_DEBUG_OBJECT (thepad, "putting %s page at the front", "Dirac");
1055 hbufs = g_list_prepend (hbufs, hbuf);
1056 pad->always_flush_page = TRUE;
1058 hbufs = g_list_append (hbufs, hbuf);
1060 gst_caps_unref (caps);
1063 GST_LOG_OBJECT (mux, "creating next headers");
1064 walk = mux->collect->data;
1069 pad = (GstOggPad *) walk->data;
1070 thepad = pad->collect.pad;
1074 GST_LOG_OBJECT (mux, "looping over headers for pad %s:%s",
1075 GST_DEBUG_PAD_NAME (thepad));
1077 hwalk = pad->headers;
1079 GstBuffer *buf = GST_BUFFER (hwalk->data);
1083 hwalk = hwalk->next;
1085 /* create a packet from the buffer */
1086 packet.packet = GST_BUFFER_DATA (buf);
1087 packet.bytes = GST_BUFFER_SIZE (buf);
1088 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1089 if (packet.granulepos == -1)
1090 packet.granulepos = 0;
1091 /* mark BOS and packet number */
1092 packet.b_o_s = (pad->packetno == 0);
1093 packet.packetno = pad->packetno++;
1097 /* swap the packet in */
1098 ogg_stream_packetin (&pad->stream, &packet);
1099 gst_buffer_unref (buf);
1101 /* if last header, flush page */
1102 if (hwalk == NULL) {
1103 GST_LOG_OBJECT (mux,
1104 "flushing page as packet %" G_GUINT64_FORMAT " is first or "
1105 "last packet", pad->packetno);
1106 while (ogg_stream_flush (&pad->stream, &page)) {
1107 GstBuffer *hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1109 GST_LOG_OBJECT (mux, "swapped out page");
1110 hbufs = g_list_append (hbufs, hbuf);
1113 GST_LOG_OBJECT (mux, "try to swap out page");
1114 /* just try to swap out a page then */
1115 while (ogg_stream_pageout (&pad->stream, &page) > 0) {
1116 GstBuffer *hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1118 GST_LOG_OBJECT (mux, "swapped out page");
1119 hbufs = g_list_append (hbufs, hbuf);
1123 g_list_free (pad->headers);
1124 pad->headers = NULL;
1126 /* hbufs holds all buffers for the headers now */
1128 /* create caps with the buffers */
1129 caps = gst_pad_get_caps (mux->srcpad);
1131 caps = gst_ogg_mux_set_header_on_caps (caps, hbufs);
1132 gst_pad_set_caps (mux->srcpad, caps);
1133 gst_caps_unref (caps);
1135 /* and send the buffers */
1136 while (hbufs != NULL) {
1137 GstBuffer *buf = GST_BUFFER (hbufs->data);
1139 hbufs = g_list_delete_link (hbufs, hbufs);
1141 if ((ret = gst_ogg_mux_push_buffer (mux, buf)) != GST_FLOW_OK)
1144 /* free any remaining nodes/buffers in case we couldn't push them */
1145 g_list_foreach (hbufs, (GFunc) gst_mini_object_unref, NULL);
1146 g_list_free (hbufs);
1151 /* this function is called to process data on the best pending pad.
1155 * 1) store the selected pad and keep on pulling until we fill a
1156 * complete ogg page or the ogg page is filled above the max-delay
1157 * threshold. This is needed because the ogg spec says that
1158 * you should fill a complete page with data from the same logical
1159 * stream. When the page is filled, go back to 1).
1160 * 2) before filling a page, read ahead one more buffer to see if this
1161 * packet is the last of the stream. We need to do this because the ogg
1162 * spec mandates that the last packet should have the EOS flag set before
1163 * sending it to ogg. if pad->buffer is NULL we need to wait to find out
1164 * whether there are any more buffers.
1165 * 3) pages get queued on a per-pad queue. Every time a page is queued, a
1166 * dequeue is called, which will dequeue the oldest page on any pad, provided
1167 * that ALL pads have at least one marked page in the queue (or remaining
1170 static GstFlowReturn
1171 gst_ogg_mux_process_best_pad (GstOggMux * ogg_mux, GstOggPad * best)
1173 GstFlowReturn ret = GST_FLOW_OK;
1174 gboolean delta_unit;
1175 gint64 granulepos = 0;
1176 GstClockTime timestamp, gp_time;
1178 GST_LOG_OBJECT (ogg_mux, "best pad %" GST_PTR_FORMAT
1179 ", currently pulling from %" GST_PTR_FORMAT, best->collect.pad,
1182 /* best->buffer is non-NULL, either the pad is EOS's or there is a next
1184 if (best->next_buffer == NULL && !best->eos) {
1185 GST_WARNING_OBJECT (ogg_mux, "no subsequent buffer and EOS not reached");
1186 return GST_FLOW_WRONG_STATE;
1189 /* if we were already pulling from one pad, but the new "best" buffer is
1190 * from another pad, we need to check if we have reason to flush a page
1191 * for the pad we were pulling from before */
1192 if (ogg_mux->pulling && best &&
1193 ogg_mux->pulling != best && ogg_mux->pulling->buffer) {
1194 GstOggPad *pad = ogg_mux->pulling;
1196 GstClockTime last_ts = GST_BUFFER_END_TIME (pad->buffer);
1198 /* if the next packet in the current page is going to make the page
1199 * too long, we need to flush */
1200 if (last_ts > ogg_mux->next_ts + ogg_mux->max_delay) {
1203 GST_LOG_OBJECT (pad->collect.pad,
1204 GST_GP_FORMAT " stored packet %" G_GINT64_FORMAT
1205 " will make page too long, flushing",
1206 GST_BUFFER_OFFSET_END (pad->buffer), (gint64) pad->stream.packetno);
1208 while (ogg_stream_flush (&pad->stream, &page)) {
1209 /* end time of this page is the timestamp of the next buffer */
1210 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1211 /* Place page into the per-pad queue */
1212 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1214 /* increment the page number counter */
1216 /* mark other pages as delta */
1217 pad->first_delta = TRUE;
1219 pad->new_page = TRUE;
1220 ogg_mux->pulling = NULL;
1224 /* if we don't know which pad to pull on, use the best one */
1225 if (ogg_mux->pulling == NULL) {
1226 ogg_mux->pulling = best;
1227 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from best pad");
1229 /* remember timestamp and gp time of first buffer for this new pad */
1230 if (ogg_mux->pulling != NULL) {
1231 ogg_mux->next_ts = GST_BUFFER_TIMESTAMP (ogg_mux->pulling->buffer);
1232 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "updated times, next ts %"
1233 GST_TIME_FORMAT, GST_TIME_ARGS (ogg_mux->next_ts));
1235 /* no pad to pull on, send EOS */
1236 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1237 return GST_FLOW_WRONG_STATE;
1241 if (ogg_mux->need_headers) {
1242 ret = gst_ogg_mux_send_headers (ogg_mux);
1243 ogg_mux->need_headers = FALSE;
1246 /* we are pulling from a pad, continue to do so until a page
1247 * has been filled and queued */
1248 if (ogg_mux->pulling != NULL) {
1251 GstBuffer *buf, *tmpbuf;
1252 GstOggPad *pad = ogg_mux->pulling;
1254 gboolean force_flush;
1256 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from pad");
1258 /* now see if we have a buffer */
1261 GST_DEBUG_OBJECT (ogg_mux, "pad was EOS");
1262 ogg_mux->pulling = NULL;
1266 delta_unit = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
1267 duration = GST_BUFFER_DURATION (buf);
1269 /* if the current "next timestamp" on the pad is unset, then this is the
1270 * first packet on the new page. Update our pad's page timestamp */
1271 if (ogg_mux->pulling->timestamp == GST_CLOCK_TIME_NONE) {
1272 ogg_mux->pulling->timestamp = GST_BUFFER_TIMESTAMP (buf);
1273 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad,
1274 "updated pad timestamp to %" GST_TIME_FORMAT,
1275 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1277 /* create a packet from the buffer */
1278 packet.packet = GST_BUFFER_DATA (buf);
1279 packet.bytes = GST_BUFFER_SIZE (buf);
1280 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1281 if (packet.granulepos == -1)
1282 packet.granulepos = 0;
1283 /* mark BOS and packet number */
1284 packet.b_o_s = (pad->packetno == 0);
1285 packet.packetno = pad->packetno++;
1286 GST_LOG_OBJECT (pad->collect.pad, GST_GP_FORMAT
1287 " packet %" G_GINT64_FORMAT " (%ld bytes) created from buffer",
1288 GST_GP_CAST (packet.granulepos), (gint64) packet.packetno,
1291 packet.e_o_s = (pad->eos ? 1 : 0);
1294 /* we flush when we see a new keyframe */
1295 force_flush = (pad->prev_delta && !delta_unit) || pad->always_flush_page;
1296 if (duration != -1) {
1297 pad->duration += duration;
1298 /* if page duration exceeds max, flush page */
1299 if (pad->duration > ogg_mux->max_page_delay) {
1305 if (GST_BUFFER_IS_DISCONT (buf)) {
1306 GST_LOG_OBJECT (pad->collect.pad, "got discont");
1308 /* No public API for this; hack things in */
1309 pad->stream.pageno++;
1313 /* flush the currently built page if necessary */
1315 GST_LOG_OBJECT (pad->collect.pad,
1316 GST_GP_FORMAT " forced flush of page before this packet",
1317 GST_BUFFER_OFFSET_END (pad->buffer));
1318 while (ogg_stream_flush (&pad->stream, &page)) {
1319 /* end time of this page is the timestamp of the next buffer */
1320 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1321 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1324 /* increment the page number counter */
1326 /* mark other pages as delta */
1327 pad->first_delta = TRUE;
1329 pad->new_page = TRUE;
1332 /* if this is the first packet of a new page figure out the delta flag */
1333 if (pad->new_page) {
1335 /* mark the page as delta */
1336 pad->first_delta = TRUE;
1338 /* got a keyframe */
1339 if (ogg_mux->delta_pad == pad) {
1340 /* if we get it on the pad with deltaunits,
1341 * we mark the page as non delta */
1342 pad->first_delta = FALSE;
1343 } else if (ogg_mux->delta_pad != NULL) {
1344 /* if there are pads with delta frames, we
1345 * must mark this one as delta */
1346 pad->first_delta = TRUE;
1348 pad->first_delta = FALSE;
1351 pad->new_page = FALSE;
1354 /* save key unit to track delta->key unit transitions */
1355 pad->prev_delta = delta_unit;
1357 /* swap the packet in */
1358 if (packet.e_o_s == 1)
1359 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in EOS packet");
1360 if (packet.b_o_s == 1)
1361 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in BOS packet");
1363 ogg_stream_packetin (&pad->stream, &packet);
1365 gp_time = GST_BUFFER_OFFSET (pad->buffer);
1366 granulepos = GST_BUFFER_OFFSET_END (pad->buffer);
1367 timestamp = GST_BUFFER_TIMESTAMP (pad->buffer);
1369 GST_LOG_OBJECT (pad->collect.pad,
1370 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", gp time %"
1371 GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT " packetin'd",
1372 granulepos, (gint64) packet.packetno, GST_TIME_ARGS (gp_time),
1373 GST_TIME_ARGS (timestamp));
1374 /* don't need the old buffer anymore */
1375 gst_buffer_unref (pad->buffer);
1376 /* store new readahead buffer */
1377 pad->buffer = tmpbuf;
1379 /* let ogg write out the pages now. The packet we got could end
1380 * up in more than one page so we need to write them all */
1381 if (ogg_stream_pageout (&pad->stream, &page) > 0) {
1382 /* we have a new page, so we need to timestamp it correctly.
1383 * if this fresh packet ends on this page, then the page's granulepos
1384 * comes from that packet, and we should set this buffer's timestamp */
1386 GST_LOG_OBJECT (pad->collect.pad,
1387 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", time %"
1388 GST_TIME_FORMAT ") caused new page",
1389 granulepos, (gint64) packet.packetno, GST_TIME_ARGS (timestamp));
1390 GST_LOG_OBJECT (pad->collect.pad,
1391 GST_GP_FORMAT " new page %ld",
1392 GST_GP_CAST (ogg_page_granulepos (&page)), pad->stream.pageno);
1394 if (ogg_page_granulepos (&page) == granulepos) {
1395 /* the packet we streamed in finishes on the current page,
1396 * because the page's granulepos is the granulepos of the last
1397 * packet completed on that page,
1398 * so update the timestamp that we will give to the page */
1399 GST_LOG_OBJECT (pad->collect.pad,
1401 " packet finishes on current page, updating gp time to %"
1402 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (gp_time));
1403 pad->gp_time = gp_time;
1405 GST_LOG_OBJECT (pad->collect.pad,
1407 " packet spans beyond current page, keeping old gp time %"
1408 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (pad->gp_time));
1412 /* end time of this page is the timestamp of the next buffer */
1413 pad->timestamp_end = timestamp;
1414 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page, pad->first_delta);
1416 /* mark next pages as delta */
1417 pad->first_delta = TRUE;
1419 /* use an inner loop here to flush the remaining pages and
1420 * mark them as delta frames as well */
1421 while (ogg_stream_pageout (&pad->stream, &page) > 0) {
1422 if (ogg_page_granulepos (&page) == granulepos) {
1423 /* the page has taken up the new packet completely, which means
1424 * the packet ends the page and we can update the gp time
1425 * before pushing out */
1426 pad->gp_time = gp_time;
1429 /* we have a complete page now, we can push the page
1430 * and make sure to pull on a new pad the next time around */
1431 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1433 /* increment the page number counter */
1436 /* need a new page as well */
1437 pad->new_page = TRUE;
1439 /* we're done pulling on this pad, make sure to choose a new
1440 * pad for pulling in the next iteration */
1441 ogg_mux->pulling = NULL;
1444 /* Update the gp time, if necessary, since any future page will have at
1445 * least this gp time.
1447 if (pad->gp_time < gp_time) {
1448 pad->gp_time = gp_time;
1449 GST_LOG_OBJECT (pad->collect.pad,
1450 "Updated running gp time of pad %" GST_PTR_FORMAT
1451 " to %" GST_TIME_FORMAT, pad->collect.pad, GST_TIME_ARGS (gp_time));
1460 * Checks if all pads are EOS'd by peeking.
1462 * Returns TRUE if all pads are EOS.
1465 all_pads_eos (GstCollectPads * pads)
1468 gboolean alleos = TRUE;
1473 GstCollectData *data = (GstCollectData *) walk->data;
1475 buf = gst_collect_pads_peek (pads, data);
1478 gst_buffer_unref (buf);
1487 /* This function is called when there is data on all pads.
1489 * It finds a pad to pull on, this is done by looking at the buffers
1490 * to decide which one to use, and using the 'oldest' one first. It then calls
1491 * gst_ogg_mux_process_best_pad() to process as much data as possible.
1493 * If all the pads have received EOS, it flushes out all data by continually
1494 * getting the best pad and calling gst_ogg_mux_process_best_pad() until they
1495 * are all empty, and then sends EOS.
1497 static GstFlowReturn
1498 gst_ogg_mux_collected (GstCollectPads * pads, GstOggMux * ogg_mux)
1504 GST_LOG_OBJECT (ogg_mux, "collected");
1506 activebefore = ogg_mux->active_pads;
1508 /* queue buffers on all pads; find a buffer with the lowest timestamp */
1509 best = gst_ogg_mux_queue_pads (ogg_mux);
1510 if (best && !best->buffer) {
1511 GST_DEBUG_OBJECT (ogg_mux, "No buffer available on best pad");
1516 return GST_FLOW_WRONG_STATE;
1519 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1521 if (ogg_mux->active_pads < activebefore) {
1522 /* If the active pad count went down, this mean at least one pad has gone
1523 * EOS. Since CollectPads only calls _collected() once when all pads are
1524 * EOS, and our code doesn't _pop() from all pads we need to check that by
1525 * peeking on all pads, else we won't be called again and the muxing will
1526 * not terminate (push out EOS). */
1528 /* if all the pads have been removed, flush all pending data */
1529 if ((ret == GST_FLOW_OK) && all_pads_eos (pads)) {
1530 GST_LOG_OBJECT (ogg_mux, "no pads remaining, flushing data");
1533 best = gst_ogg_mux_queue_pads (ogg_mux);
1535 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1536 } while ((ret == GST_FLOW_OK) && (best != NULL));
1538 GST_DEBUG_OBJECT (ogg_mux, "Pushing EOS");
1539 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1547 gst_ogg_mux_get_property (GObject * object,
1548 guint prop_id, GValue * value, GParamSpec * pspec)
1552 ogg_mux = GST_OGG_MUX (object);
1556 g_value_set_uint64 (value, ogg_mux->max_delay);
1558 case ARG_MAX_PAGE_DELAY:
1559 g_value_set_uint64 (value, ogg_mux->max_page_delay);
1562 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1568 gst_ogg_mux_set_property (GObject * object,
1569 guint prop_id, const GValue * value, GParamSpec * pspec)
1573 ogg_mux = GST_OGG_MUX (object);
1577 ogg_mux->max_delay = g_value_get_uint64 (value);
1579 case ARG_MAX_PAGE_DELAY:
1580 ogg_mux->max_page_delay = g_value_get_uint64 (value);
1583 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1588 /* reset all variables in the ogg pads. */
1590 gst_ogg_mux_init_collectpads (GstCollectPads * collect)
1594 walk = collect->data;
1596 GstOggPad *oggpad = (GstOggPad *) walk->data;
1598 ogg_stream_init (&oggpad->stream, oggpad->serial);
1599 oggpad->packetno = 0;
1601 oggpad->eos = FALSE;
1602 /* we assume there will be some control data first for this pad */
1603 oggpad->state = GST_OGG_PAD_STATE_CONTROL;
1604 oggpad->new_page = TRUE;
1605 oggpad->first_delta = FALSE;
1606 oggpad->prev_delta = FALSE;
1607 oggpad->pagebuffers = g_queue_new ();
1609 walk = g_slist_next (walk);
1613 /* Clear all buffers from the collectpads object */
1615 gst_ogg_mux_clear_collectpads (GstCollectPads * collect)
1619 for (walk = collect->data; walk; walk = g_slist_next (walk)) {
1620 GstOggPad *oggpad = (GstOggPad *) walk->data;
1623 ogg_stream_clear (&oggpad->stream);
1625 while ((buf = g_queue_pop_head (oggpad->pagebuffers)) != NULL) {
1626 gst_buffer_unref (buf);
1628 g_queue_free (oggpad->pagebuffers);
1629 oggpad->pagebuffers = NULL;
1631 if (oggpad->buffer) {
1632 gst_buffer_unref (oggpad->buffer);
1633 oggpad->buffer = NULL;
1635 if (oggpad->next_buffer) {
1636 gst_buffer_unref (oggpad->next_buffer);
1637 oggpad->next_buffer = NULL;
1642 static GstStateChangeReturn
1643 gst_ogg_mux_change_state (GstElement * element, GstStateChange transition)
1646 GstStateChangeReturn ret;
1648 ogg_mux = GST_OGG_MUX (element);
1650 switch (transition) {
1651 case GST_STATE_CHANGE_NULL_TO_READY:
1653 case GST_STATE_CHANGE_READY_TO_PAUSED:
1654 gst_ogg_mux_clear (ogg_mux);
1655 gst_ogg_mux_init_collectpads (ogg_mux->collect);
1656 gst_collect_pads_start (ogg_mux->collect);
1658 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1660 case GST_STATE_CHANGE_PAUSED_TO_READY:
1661 gst_collect_pads_stop (ogg_mux->collect);
1667 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1669 switch (transition) {
1670 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1672 case GST_STATE_CHANGE_PAUSED_TO_READY:
1673 gst_ogg_mux_clear_collectpads (ogg_mux->collect);
1675 case GST_STATE_CHANGE_READY_TO_NULL:
1685 gst_ogg_mux_plugin_init (GstPlugin * plugin)
1687 GST_DEBUG_CATEGORY_INIT (gst_ogg_mux_debug, "oggmux", 0, "ogg muxer");
1689 return gst_element_register (plugin, "oggmux", GST_RANK_PRIMARY,