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 "]"
68 GST_OGG_FLAG_BOS = GST_ELEMENT_FLAG_LAST,
73 /* elementfactory information */
74 static const GstElementDetails gst_ogg_mux_details =
75 GST_ELEMENT_DETAILS ("Ogg muxer",
77 "mux ogg streams (info about ogg: http://xiph.org)",
78 "Wim Taymans <wim@fluendo.com>");
80 /* OggMux signals and args */
87 /* set to 0.5 seconds by default */
88 #define DEFAULT_MAX_DELAY G_GINT64_CONSTANT(500000000)
89 #define DEFAULT_MAX_PAGE_DELAY G_GINT64_CONSTANT(500000000)
97 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
100 GST_STATIC_CAPS ("application/ogg")
103 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
106 GST_STATIC_CAPS ("video/x-theora; "
107 "audio/x-vorbis; audio/x-flac; audio/x-speex; audio/x-celt; "
108 "application/x-ogm-video; application/x-ogm-audio; video/x-dirac; "
109 "video/x-smoke; text/x-cmml, encoded = (boolean) TRUE; "
110 "subtitle/x-kate; application/x-kate")
113 static void gst_ogg_mux_base_init (gpointer g_class);
114 static void gst_ogg_mux_class_init (GstOggMuxClass * klass);
115 static void gst_ogg_mux_init (GstOggMux * ogg_mux);
116 static void gst_ogg_mux_finalize (GObject * object);
119 gst_ogg_mux_collected (GstCollectPads * pads, GstOggMux * ogg_mux);
120 static gboolean gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event);
121 static GstPad *gst_ogg_mux_request_new_pad (GstElement * element,
122 GstPadTemplate * templ, const gchar * name);
123 static void gst_ogg_mux_release_pad (GstElement * element, GstPad * pad);
125 static void gst_ogg_mux_set_property (GObject * object,
126 guint prop_id, const GValue * value, GParamSpec * pspec);
127 static void gst_ogg_mux_get_property (GObject * object,
128 guint prop_id, GValue * value, GParamSpec * pspec);
129 static GstStateChangeReturn gst_ogg_mux_change_state (GstElement * element,
130 GstStateChange transition);
132 static GstElementClass *parent_class = NULL;
134 /*static guint gst_ogg_mux_signals[LAST_SIGNAL] = { 0 }; */
137 gst_ogg_mux_get_type (void)
139 static GType ogg_mux_type = 0;
141 if (G_UNLIKELY (ogg_mux_type == 0)) {
142 static const GTypeInfo ogg_mux_info = {
143 sizeof (GstOggMuxClass),
144 gst_ogg_mux_base_init,
146 (GClassInitFunc) gst_ogg_mux_class_init,
151 (GInstanceInitFunc) gst_ogg_mux_init,
153 static const GInterfaceInfo preset_info = {
160 g_type_register_static (GST_TYPE_ELEMENT, "GstOggMux", &ogg_mux_info,
163 g_type_add_interface_static (ogg_mux_type, GST_TYPE_PRESET, &preset_info);
169 gst_ogg_mux_base_init (gpointer g_class)
171 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
173 gst_element_class_add_pad_template (element_class,
174 gst_static_pad_template_get (&src_factory));
175 gst_element_class_add_pad_template (element_class,
176 gst_static_pad_template_get (&sink_factory));
178 gst_element_class_set_details (element_class, &gst_ogg_mux_details);
182 gst_ogg_mux_class_init (GstOggMuxClass * klass)
184 GObjectClass *gobject_class;
185 GstElementClass *gstelement_class;
187 gobject_class = (GObjectClass *) klass;
188 gstelement_class = (GstElementClass *) klass;
190 parent_class = g_type_class_peek_parent (klass);
192 gobject_class->finalize = gst_ogg_mux_finalize;
193 gobject_class->get_property = gst_ogg_mux_get_property;
194 gobject_class->set_property = gst_ogg_mux_set_property;
196 gstelement_class->request_new_pad = gst_ogg_mux_request_new_pad;
197 gstelement_class->release_pad = gst_ogg_mux_release_pad;
199 g_object_class_install_property (gobject_class, ARG_MAX_DELAY,
200 g_param_spec_uint64 ("max-delay", "Max delay",
201 "Maximum delay in multiplexing streams", 0, G_MAXUINT64,
203 (GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
204 g_object_class_install_property (gobject_class, ARG_MAX_PAGE_DELAY,
205 g_param_spec_uint64 ("max-page-delay", "Max page delay",
206 "Maximum delay for sending out a page", 0, G_MAXUINT64,
207 DEFAULT_MAX_PAGE_DELAY,
208 (GParamFlags) G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
210 gstelement_class->change_state = gst_ogg_mux_change_state;
215 static const GstEventMask *
216 gst_ogg_mux_get_sink_event_masks (GstPad * pad)
218 static const GstEventMask gst_ogg_mux_sink_event_masks[] = {
220 {GST_EVENT_DISCONTINUOUS, 0},
224 return gst_ogg_mux_sink_event_masks;
229 gst_ogg_mux_clear (GstOggMux * ogg_mux)
231 ogg_mux->pulling = NULL;
232 ogg_mux->need_headers = TRUE;
233 ogg_mux->max_delay = DEFAULT_MAX_DELAY;
234 ogg_mux->max_page_delay = DEFAULT_MAX_PAGE_DELAY;
235 ogg_mux->delta_pad = NULL;
237 ogg_mux->next_ts = 0;
238 ogg_mux->last_ts = GST_CLOCK_TIME_NONE;
242 gst_ogg_mux_init (GstOggMux * ogg_mux)
244 GstElementClass *klass = GST_ELEMENT_GET_CLASS (ogg_mux);
247 gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
249 gst_pad_set_event_function (ogg_mux->srcpad, gst_ogg_mux_handle_src_event);
250 gst_element_add_pad (GST_ELEMENT (ogg_mux), ogg_mux->srcpad);
252 GST_OBJECT_FLAG_SET (GST_ELEMENT (ogg_mux), GST_OGG_FLAG_BOS);
254 /* seed random number generator for creation of serial numbers */
257 ogg_mux->collect = gst_collect_pads_new ();
258 gst_collect_pads_set_function (ogg_mux->collect,
259 (GstCollectPadsFunction) GST_DEBUG_FUNCPTR (gst_ogg_mux_collected),
262 gst_ogg_mux_clear (ogg_mux);
266 gst_ogg_mux_finalize (GObject * object)
270 ogg_mux = GST_OGG_MUX (object);
272 if (ogg_mux->collect) {
273 gst_object_unref (ogg_mux->collect);
274 ogg_mux->collect = NULL;
277 G_OBJECT_CLASS (parent_class)->finalize (object);
281 gst_ogg_mux_ogg_pad_destroy_notify (GstCollectData * data)
283 GstOggPad *oggpad = (GstOggPad *) data;
286 ogg_stream_clear (&oggpad->stream);
288 if (oggpad->pagebuffers) {
289 while ((buf = g_queue_pop_head (oggpad->pagebuffers)) != NULL) {
290 gst_buffer_unref (buf);
292 g_queue_free (oggpad->pagebuffers);
293 oggpad->pagebuffers = NULL;
297 static GstPadLinkReturn
298 gst_ogg_mux_sinkconnect (GstPad * pad, GstPad * peer)
302 ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
304 GST_DEBUG_OBJECT (ogg_mux, "sinkconnect triggered on %s", GST_PAD_NAME (pad));
306 gst_object_unref (ogg_mux);
308 return GST_PAD_LINK_OK;
312 gst_ogg_mux_sink_event (GstPad * pad, GstEvent * event)
314 GstOggMux *ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
315 GstOggPad *ogg_pad = (GstOggPad *) gst_pad_get_element_private (pad);
318 GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
319 GST_DEBUG_PAD_NAME (pad));
321 switch (GST_EVENT_TYPE (event)) {
322 case GST_EVENT_NEWSEGMENT:
323 /* We don't support NEWSEGMENT events */
324 gst_event_unref (event);
332 /* now GstCollectPads can take care of the rest, e.g. EOS */
334 ret = ogg_pad->collect_event (pad, event);
336 gst_object_unref (ogg_mux);
341 gst_ogg_mux_request_new_pad (GstElement * element,
342 GstPadTemplate * templ, const gchar * req_name)
346 GstElementClass *klass;
348 g_return_val_if_fail (templ != NULL, NULL);
350 if (templ->direction != GST_PAD_SINK)
351 goto wrong_direction;
353 g_return_val_if_fail (GST_IS_OGG_MUX (element), NULL);
354 ogg_mux = GST_OGG_MUX (element);
356 klass = GST_ELEMENT_GET_CLASS (element);
358 if (templ != gst_element_class_get_pad_template (klass, "sink_%d"))
365 if (req_name == NULL || strlen (req_name) < 6) {
366 /* no name given when requesting the pad, use random serial number */
369 /* parse serial number from requested padname */
370 serial = atoi (&req_name[5]);
372 /* create new pad with the name */
373 GST_DEBUG_OBJECT (ogg_mux, "Creating new pad for serial %d", serial);
374 name = g_strdup_printf ("sink_%d", serial);
375 newpad = gst_pad_new_from_template (templ, name);
378 /* construct our own wrapper data structure for the pad to
379 * keep track of its status */
383 oggpad = (GstOggPad *)
384 gst_collect_pads_add_pad_full (ogg_mux->collect, newpad,
385 sizeof (GstOggPad), gst_ogg_mux_ogg_pad_destroy_notify);
386 ogg_mux->active_pads++;
388 oggpad->serial = serial;
389 ogg_stream_init (&oggpad->stream, serial);
390 oggpad->packetno = 0;
393 /* we assume there will be some control data first for this pad */
394 oggpad->state = GST_OGG_PAD_STATE_CONTROL;
395 oggpad->new_page = TRUE;
396 oggpad->first_delta = FALSE;
397 oggpad->prev_delta = FALSE;
398 oggpad->pagebuffers = g_queue_new ();
400 oggpad->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (newpad);
401 gst_pad_set_event_function (newpad,
402 GST_DEBUG_FUNCPTR (gst_ogg_mux_sink_event));
406 /* setup some pad functions */
407 gst_pad_set_link_function (newpad, gst_ogg_mux_sinkconnect);
409 /* dd the pad to the element */
410 gst_element_add_pad (element, newpad);
417 g_warning ("ogg_mux: request pad that is not a SINK pad\n");
422 g_warning ("ogg_mux: this is not our template!\n");
428 gst_ogg_mux_release_pad (GstElement * element, GstPad * pad)
432 ogg_mux = GST_OGG_MUX (gst_pad_get_parent (pad));
434 gst_collect_pads_remove_pad (ogg_mux->collect, pad);
435 gst_element_remove_pad (element, pad);
437 gst_object_unref (ogg_mux);
442 gst_ogg_mux_handle_src_event (GstPad * pad, GstEvent * event)
446 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
450 /* disable seeking for now */
456 return gst_pad_event_default (pad, event);
460 gst_ogg_mux_buffer_from_page (GstOggMux * mux, ogg_page * page, gboolean delta)
464 /* allocate space for header and body */
465 buffer = gst_buffer_new_and_alloc (page->header_len + page->body_len);
466 memcpy (GST_BUFFER_DATA (buffer), page->header, page->header_len);
467 memcpy (GST_BUFFER_DATA (buffer) + page->header_len,
468 page->body, page->body_len);
470 /* Here we set granulepos as our OFFSET_END to give easy direct access to
471 * this value later. Before we push it, we reset this to OFFSET + SIZE
472 * (see gst_ogg_mux_push_buffer). */
473 GST_BUFFER_OFFSET_END (buffer) = ogg_page_granulepos (page);
475 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
477 GST_LOG_OBJECT (mux, GST_GP_FORMAT
478 " created buffer %p from ogg page", ogg_page_granulepos (page), buffer);
484 gst_ogg_mux_push_buffer (GstOggMux * mux, GstBuffer * buffer)
488 /* fix up OFFSET and OFFSET_END again */
489 GST_BUFFER_OFFSET (buffer) = mux->offset;
490 mux->offset += GST_BUFFER_SIZE (buffer);
491 GST_BUFFER_OFFSET_END (buffer) = mux->offset;
493 /* Ensure we have monotonically increasing timestamps in the output. */
494 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
495 if (mux->last_ts != GST_CLOCK_TIME_NONE &&
496 GST_BUFFER_TIMESTAMP (buffer) < mux->last_ts)
497 GST_BUFFER_TIMESTAMP (buffer) = mux->last_ts;
499 mux->last_ts = GST_BUFFER_TIMESTAMP (buffer);
502 caps = gst_static_pad_template_get_caps (&src_factory);
503 gst_buffer_set_caps (buffer, caps);
504 gst_caps_unref (caps);
506 return gst_pad_push (mux->srcpad, buffer);
509 /* if all queues have at least one page, dequeue the page with the lowest
512 gst_ogg_mux_dequeue_page (GstOggMux * mux, GstFlowReturn * flowret)
515 GstOggPad *opad = NULL; /* "oldest" pad */
516 GstClockTime oldest = GST_CLOCK_TIME_NONE;
517 GstBuffer *buf = NULL;
518 gboolean ret = FALSE;
520 *flowret = GST_FLOW_OK;
522 walk = mux->collect->data;
524 GstOggPad *pad = (GstOggPad *) walk->data;
526 /* We need each queue to either be at EOS, or have one or more pages
527 * available with a set granulepos (i.e. not -1), otherwise we don't have
528 * enough data yet to determine which stream needs to go next for correct
530 if (pad->pagebuffers->length == 0) {
532 GST_LOG_OBJECT (pad->collect.pad,
533 "pad is EOS, skipping for dequeue decision");
535 GST_LOG_OBJECT (pad->collect.pad,
536 "no pages in this queue, can't dequeue");
540 /* We then need to check for a non-negative granulepos */
542 gboolean valid = FALSE;
544 for (i = 0; i < pad->pagebuffers->length; i++) {
545 buf = g_queue_peek_nth (pad->pagebuffers, i);
546 /* Here we check the OFFSET_END, which is actually temporarily the
547 * granulepos value for this buffer */
548 if (GST_BUFFER_OFFSET_END (buf) != -1) {
554 GST_LOG_OBJECT (pad->collect.pad,
555 "No page timestamps in queue, can't dequeue");
560 walk = g_slist_next (walk);
563 walk = mux->collect->data;
565 GstOggPad *pad = (GstOggPad *) walk->data;
567 /* any page with a granulepos of -1 can be pushed immediately.
568 * TODO: it CAN be, but it seems silly to do so? */
569 buf = g_queue_peek_head (pad->pagebuffers);
570 while (buf && GST_BUFFER_OFFSET_END (buf) == -1) {
571 GST_LOG_OBJECT (pad->collect.pad, "[gp -1] pushing page");
572 g_queue_pop_head (pad->pagebuffers);
573 *flowret = gst_ogg_mux_push_buffer (mux, buf);
574 buf = g_queue_peek_head (pad->pagebuffers);
579 /* if no oldest buffer yet, take this one */
580 if (oldest == GST_CLOCK_TIME_NONE) {
581 GST_LOG_OBJECT (mux, "no oldest yet, taking buffer %p from pad %"
582 GST_PTR_FORMAT " with gp time %" GST_TIME_FORMAT,
583 buf, pad->collect.pad, GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
584 oldest = GST_BUFFER_OFFSET (buf);
587 /* if we have an oldest, compare with this one */
588 if (GST_BUFFER_OFFSET (buf) < oldest) {
589 GST_LOG_OBJECT (mux, "older buffer %p, taking from pad %"
590 GST_PTR_FORMAT " with gp time %" GST_TIME_FORMAT,
591 buf, pad->collect.pad, GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
592 oldest = GST_BUFFER_OFFSET (buf);
597 walk = g_slist_next (walk);
600 if (oldest != GST_CLOCK_TIME_NONE) {
602 buf = g_queue_pop_head (opad->pagebuffers);
603 GST_LOG_OBJECT (opad->collect.pad,
604 GST_GP_FORMAT " pushing oldest page buffer %p (granulepos time %"
605 GST_TIME_FORMAT ")", GST_BUFFER_OFFSET_END (buf), buf,
606 GST_TIME_ARGS (GST_BUFFER_OFFSET (buf)));
607 *flowret = gst_ogg_mux_push_buffer (mux, buf);
614 /* put the given ogg page on a per-pad queue, timestamping it correctly.
615 * after that, dequeue and push as many pages as possible.
616 * Caller should make sure:
617 * pad->timestamp was set with the timestamp of the first packet put
619 * pad->timestamp_end was set with the timestamp + duration of the last packet
621 * pad->gp_time was set with the time matching the gp of the last
622 * packet put on the page
624 * will also reset timestamp and timestamp_end, so caller func can restart
628 gst_ogg_mux_pad_queue_page (GstOggMux * mux, GstOggPad * pad, ogg_page * page,
632 GstBuffer *buffer = gst_ogg_mux_buffer_from_page (mux, page, delta);
634 /* take the timestamp of the first packet on this page */
635 GST_BUFFER_TIMESTAMP (buffer) = pad->timestamp;
636 GST_BUFFER_DURATION (buffer) = pad->timestamp_end - pad->timestamp;
637 /* take the gp time of the last completed packet on this page */
638 GST_BUFFER_OFFSET (buffer) = pad->gp_time;
640 /* the next page will start where the current page's end time leaves off */
641 pad->timestamp = pad->timestamp_end;
643 g_queue_push_tail (pad->pagebuffers, buffer);
644 GST_LOG_OBJECT (pad->collect.pad, GST_GP_FORMAT
645 " queued buffer page %p (gp time %"
646 GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT
647 "), %d page buffers queued", ogg_page_granulepos (page),
648 buffer, GST_TIME_ARGS (GST_BUFFER_OFFSET (buffer)),
649 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
650 g_queue_get_length (pad->pagebuffers));
652 while (gst_ogg_mux_dequeue_page (mux, &ret)) {
653 if (ret != GST_FLOW_OK)
661 * Given two pads, compare the buffers queued on it.
663 * 0 if they have an equal priority
664 * -1 if the first is better
665 * 1 if the second is better
666 * Priority decided by: a) validity, b) older timestamp, c) smaller number
670 gst_ogg_mux_compare_pads (GstOggMux * ogg_mux, GstOggPad * first,
673 guint64 firsttime, secondtime;
675 /* if the first pad doesn't contain anything or is even NULL, return
676 * the second pad as best candidate and vice versa */
677 if (first == NULL || (first->buffer == NULL && first->next_buffer == NULL))
679 if (second == NULL || (second->buffer == NULL && second->next_buffer == NULL))
682 /* no timestamp on first buffer, it must go first */
684 firsttime = GST_BUFFER_TIMESTAMP (first->buffer);
686 firsttime = GST_BUFFER_TIMESTAMP (first->next_buffer);
687 if (firsttime == GST_CLOCK_TIME_NONE)
690 /* no timestamp on second buffer, it must go first */
692 secondtime = GST_BUFFER_TIMESTAMP (second->buffer);
694 secondtime = GST_BUFFER_TIMESTAMP (second->next_buffer);
695 if (secondtime == GST_CLOCK_TIME_NONE)
698 /* first buffer has higher timestamp, second one should go first */
699 if (secondtime < firsttime)
701 /* second buffer has higher timestamp, first one should go first */
702 else if (secondtime > firsttime)
705 /* buffers with equal timestamps, prefer the pad that has the
706 * least number of pages muxed */
707 if (second->pageno < first->pageno)
709 else if (second->pageno > first->pageno)
713 /* same priority if all of the above failed */
717 /* make sure at least one buffer is queued on all pads, two if possible
719 * if pad->buffer == NULL, pad->next_buffer != NULL, then
720 * we do not know if the buffer is the last or not
721 * if pad->buffer != NULL, pad->next_buffer != NULL, then
722 * pad->buffer is not the last buffer for the pad
723 * if pad->buffer != NULL, pad->next_buffer == NULL, then
724 * pad->buffer if the last buffer for the pad
726 * returns a pointer to an oggpad that holds the best buffer, or
727 * NULL when no pad was usable. "best" means the buffer marked
728 * with the lowest timestamp. If best->buffer == NULL then nothing
729 * should be done until more data arrives */
731 gst_ogg_mux_queue_pads (GstOggMux * ogg_mux)
733 GstOggPad *bestpad = NULL, *still_hungry = NULL;
736 /* try to make sure we have a buffer from each usable pad first */
737 walk = ogg_mux->collect->data;
740 GstCollectData *data;
742 data = (GstCollectData *) walk->data;
743 pad = (GstOggPad *) data;
745 walk = g_slist_next (walk);
747 GST_LOG_OBJECT (data->pad, "looking at pad for buffer");
749 /* try to get a new buffer for this pad if needed and possible */
750 if (pad->buffer == NULL) {
754 /* shift the buffer along if needed (it's okay if next_buffer is NULL) */
755 if (pad->buffer == NULL) {
756 GST_LOG_OBJECT (data->pad, "shifting buffer %" GST_PTR_FORMAT,
758 pad->buffer = pad->next_buffer;
759 pad->next_buffer = NULL;
762 buf = gst_collect_pads_pop (ogg_mux->collect, data);
763 GST_LOG_OBJECT (data->pad, "popped buffer %" GST_PTR_FORMAT, buf);
765 /* On EOS we get a NULL buffer */
767 if (ogg_mux->delta_pad == NULL &&
768 GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT))
769 ogg_mux->delta_pad = pad;
771 incaps = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
772 /* if we need headers */
773 if (pad->state == GST_OGG_PAD_STATE_CONTROL) {
774 /* and we have one */
776 GST_DEBUG_OBJECT (ogg_mux,
777 "got incaps buffer in control state, ignoring");
779 gst_buffer_unref (buf);
782 GST_DEBUG_OBJECT (ogg_mux,
783 "got data buffer in control state, switching " "to data mode");
784 /* this is a data buffer so switch to data state */
785 pad->state = GST_OGG_PAD_STATE_DATA;
789 GST_DEBUG_OBJECT (data->pad, "EOS on pad");
794 /* it's no longer active */
795 ogg_mux->active_pads--;
797 /* Just gone to EOS. Flush existing page(s) */
800 while (ogg_stream_flush (&pad->stream, &page)) {
801 /* Place page into the per-pad queue */
802 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
804 /* increment the page number counter */
806 /* mark other pages as delta */
807 pad->first_delta = TRUE;
812 pad->next_buffer = buf;
815 /* we should have a buffer now, see if it is the best pad to
817 if (pad->buffer || pad->next_buffer) {
818 if (gst_ogg_mux_compare_pads (ogg_mux, bestpad, pad) > 0) {
819 GST_LOG_OBJECT (data->pad,
820 "new best pad, with buffers %" GST_PTR_FORMAT
821 " and %" GST_PTR_FORMAT, pad->buffer, pad->next_buffer);
825 } else if (!pad->eos) {
826 GST_LOG_OBJECT (data->pad, "hungry pad");
832 /* drop back into collectpads... */
839 gst_ogg_mux_get_headers (GstOggPad * pad)
842 GstStructure *structure;
846 thepad = pad->collect.pad;
848 GST_LOG_OBJECT (thepad, "getting headers");
850 caps = gst_pad_get_negotiated_caps (thepad);
852 const GValue *streamheader;
854 structure = gst_caps_get_structure (caps, 0);
855 streamheader = gst_structure_get_value (structure, "streamheader");
856 if (streamheader != NULL) {
857 GST_LOG_OBJECT (thepad, "got header");
858 if (G_VALUE_TYPE (streamheader) == GST_TYPE_ARRAY) {
859 GArray *bufarr = g_value_peek_pointer (streamheader);
862 GST_LOG_OBJECT (thepad, "got fixed list");
864 for (i = 0; i < bufarr->len; i++) {
865 GValue *bufval = &g_array_index (bufarr, GValue, i);
867 GST_LOG_OBJECT (thepad, "item %d", i);
868 if (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER) {
869 GstBuffer *buf = g_value_peek_pointer (bufval);
871 GST_LOG_OBJECT (thepad, "adding item %d to header list", i);
873 gst_buffer_ref (buf);
874 res = g_list_append (res, buf);
878 GST_LOG_OBJECT (thepad, "streamheader is not fixed list");
880 } else if (gst_structure_has_name (structure, "video/x-dirac")) {
881 res = g_list_append (res, pad->buffer);
882 pad->buffer = pad->next_buffer;
883 pad->next_buffer = NULL;
884 pad->always_flush_page = TRUE;
886 GST_LOG_OBJECT (thepad, "caps don't have streamheader");
888 gst_caps_unref (caps);
890 GST_LOG_OBJECT (thepad, "got empty caps as negotiated format");
896 gst_ogg_mux_set_header_on_caps (GstCaps * caps, GList * buffers)
898 GstStructure *structure;
899 GValue array = { 0 };
900 GList *walk = buffers;
902 caps = gst_caps_make_writable (caps);
904 structure = gst_caps_get_structure (caps, 0);
906 /* put buffers in a fixed list */
907 g_value_init (&array, GST_TYPE_ARRAY);
910 GstBuffer *buf = GST_BUFFER (walk->data);
912 GValue value = { 0 };
917 GST_LOG ("Setting IN_CAPS on buffer of length %d", GST_BUFFER_SIZE (buf));
918 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
920 g_value_init (&value, GST_TYPE_BUFFER);
921 copy = gst_buffer_copy (buf);
922 gst_value_set_buffer (&value, copy);
923 gst_buffer_unref (copy);
924 gst_value_array_append_value (&array, &value);
925 g_value_unset (&value);
927 gst_structure_set_value (structure, "streamheader", &array);
928 g_value_unset (&array);
934 * For each pad we need to write out one (small) header in one
935 * page that allows decoders to identify the type of the stream.
936 * After that we need to write out all extra info for the decoders.
937 * In the case of a codec that also needs data as configuration, we can
938 * find that info in the streamcaps.
939 * After writing the headers we must start a new page for the data.
942 gst_ogg_mux_send_headers (GstOggMux * mux)
945 GList *hbufs, *hwalk;
952 GST_LOG_OBJECT (mux, "collecting headers");
954 walk = mux->collect->data;
959 pad = (GstOggPad *) walk->data;
960 thepad = pad->collect.pad;
962 walk = g_slist_next (walk);
964 GST_LOG_OBJECT (mux, "looking at pad %s:%s", GST_DEBUG_PAD_NAME (thepad));
966 /* if the pad has no buffer, we don't care */
967 if (pad->buffer == NULL && pad->next_buffer == NULL)
970 /* now figure out the headers */
971 pad->headers = gst_ogg_mux_get_headers (pad);
974 GST_LOG_OBJECT (mux, "creating BOS pages");
975 walk = mux->collect->data;
983 GstStructure *structure;
986 pad = (GstOggPad *) walk->data;
987 thepad = pad->collect.pad;
988 caps = gst_pad_get_negotiated_caps (thepad);
989 structure = gst_caps_get_structure (caps, 0);
995 GST_LOG_OBJECT (thepad, "looping over headers");
998 buf = GST_BUFFER (pad->headers->data);
999 pad->headers = g_list_remove (pad->headers, buf);
1000 } else if (pad->buffer) {
1002 gst_buffer_ref (buf);
1003 } else if (pad->next_buffer) {
1004 buf = pad->next_buffer;
1005 gst_buffer_ref (buf);
1007 /* fixme -- should be caught in the previous list traversal. */
1008 GST_OBJECT_LOCK (pad);
1009 g_critical ("No headers or buffers on pad %s:%s",
1010 GST_DEBUG_PAD_NAME (pad));
1011 GST_OBJECT_UNLOCK (pad);
1015 /* create a packet from the buffer */
1016 packet.packet = GST_BUFFER_DATA (buf);
1017 packet.bytes = GST_BUFFER_SIZE (buf);
1018 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1019 if (packet.granulepos == -1)
1020 packet.granulepos = 0;
1021 /* mark BOS and packet number */
1022 packet.b_o_s = (pad->packetno == 0);
1023 packet.packetno = pad->packetno++;
1027 /* swap the packet in */
1028 ogg_stream_packetin (&pad->stream, &packet);
1029 gst_buffer_unref (buf);
1031 GST_LOG_OBJECT (thepad, "flushing out BOS page");
1032 if (!ogg_stream_flush (&pad->stream, &page))
1033 g_critical ("Could not flush BOS page");
1035 hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1037 GST_LOG_OBJECT (mux, "swapped out page with mime type %s",
1038 gst_structure_get_name (structure));
1040 /* quick hack: put Theora and Dirac video pages at the front.
1041 * Ideally, we would have a settable enum for which Ogg
1042 * profile we work with, and order based on that.
1043 * (FIXME: if there is more than one video stream, shouldn't we only put
1044 * one's BOS into the first page, followed by an audio stream's BOS, and
1045 * only then followed by the remaining video and audio streams?) */
1046 if (gst_structure_has_name (structure, "video/x-theora")) {
1047 GST_DEBUG_OBJECT (thepad, "putting %s page at the front", "Theora");
1048 hbufs = g_list_prepend (hbufs, hbuf);
1049 pad->always_flush_page = TRUE;
1050 } else if (gst_structure_has_name (structure, "video/x-dirac")) {
1051 GST_DEBUG_OBJECT (thepad, "putting %s page at the front", "Dirac");
1052 hbufs = g_list_prepend (hbufs, hbuf);
1053 pad->always_flush_page = TRUE;
1055 hbufs = g_list_append (hbufs, hbuf);
1057 gst_caps_unref (caps);
1060 GST_LOG_OBJECT (mux, "creating next headers");
1061 walk = mux->collect->data;
1066 pad = (GstOggPad *) walk->data;
1067 thepad = pad->collect.pad;
1071 GST_LOG_OBJECT (mux, "looping over headers for pad %s:%s",
1072 GST_DEBUG_PAD_NAME (thepad));
1074 hwalk = pad->headers;
1076 GstBuffer *buf = GST_BUFFER (hwalk->data);
1080 hwalk = hwalk->next;
1082 /* create a packet from the buffer */
1083 packet.packet = GST_BUFFER_DATA (buf);
1084 packet.bytes = GST_BUFFER_SIZE (buf);
1085 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1086 if (packet.granulepos == -1)
1087 packet.granulepos = 0;
1088 /* mark BOS and packet number */
1089 packet.b_o_s = (pad->packetno == 0);
1090 packet.packetno = pad->packetno++;
1094 /* swap the packet in */
1095 ogg_stream_packetin (&pad->stream, &packet);
1096 gst_buffer_unref (buf);
1098 /* if last header, flush page */
1099 if (hwalk == NULL) {
1100 GST_LOG_OBJECT (mux,
1101 "flushing page as packet %" G_GUINT64_FORMAT " is first or "
1102 "last packet", pad->packetno);
1103 while (ogg_stream_flush (&pad->stream, &page)) {
1104 GstBuffer *hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1106 GST_LOG_OBJECT (mux, "swapped out page");
1107 hbufs = g_list_append (hbufs, hbuf);
1110 GST_LOG_OBJECT (mux, "try to swap out page");
1111 /* just try to swap out a page then */
1112 while (ogg_stream_pageout (&pad->stream, &page) > 0) {
1113 GstBuffer *hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1115 GST_LOG_OBJECT (mux, "swapped out page");
1116 hbufs = g_list_append (hbufs, hbuf);
1120 g_list_free (pad->headers);
1121 pad->headers = NULL;
1123 /* hbufs holds all buffers for the headers now */
1125 /* create caps with the buffers */
1126 caps = gst_pad_get_caps (mux->srcpad);
1128 caps = gst_ogg_mux_set_header_on_caps (caps, hbufs);
1129 gst_pad_set_caps (mux->srcpad, caps);
1130 gst_caps_unref (caps);
1132 /* and send the buffers */
1135 GstBuffer *buf = GST_BUFFER (hwalk->data);
1137 hwalk = hwalk->next;
1139 if ((ret = gst_ogg_mux_push_buffer (mux, buf)) != GST_FLOW_OK)
1142 g_list_free (hbufs);
1147 /* this function is called to process data on the best pending pad.
1151 * 1) store the selected pad and keep on pulling until we fill a
1152 * complete ogg page or the ogg page is filled above the max-delay
1153 * threshold. This is needed because the ogg spec says that
1154 * you should fill a complete page with data from the same logical
1155 * stream. When the page is filled, go back to 1).
1156 * 2) before filling a page, read ahead one more buffer to see if this
1157 * packet is the last of the stream. We need to do this because the ogg
1158 * spec mandates that the last packet should have the EOS flag set before
1159 * sending it to ogg. if pad->buffer is NULL we need to wait to find out
1160 * whether there are any more buffers.
1161 * 3) pages get queued on a per-pad queue. Every time a page is queued, a
1162 * dequeue is called, which will dequeue the oldest page on any pad, provided
1163 * that ALL pads have at least one marked page in the queue (or remaining
1166 static GstFlowReturn
1167 gst_ogg_mux_process_best_pad (GstOggMux * ogg_mux, GstOggPad * best)
1169 GstFlowReturn ret = GST_FLOW_OK;
1170 gboolean delta_unit;
1171 gint64 granulepos = 0;
1172 GstClockTime timestamp, gp_time;
1174 GST_LOG_OBJECT (ogg_mux, "best pad %" GST_PTR_FORMAT
1175 ", currently pulling from %" GST_PTR_FORMAT, best->collect.pad,
1178 /* best->buffer is non-NULL, either the pad is EOS's or there is a next
1180 if (best->next_buffer == NULL && !best->eos) {
1181 GST_WARNING_OBJECT (ogg_mux, "no subsequent buffer and EOS not reached");
1182 return GST_FLOW_WRONG_STATE;
1185 /* if we were already pulling from one pad, but the new "best" buffer is
1186 * from another pad, we need to check if we have reason to flush a page
1187 * for the pad we were pulling from before */
1188 if (ogg_mux->pulling && best &&
1189 ogg_mux->pulling != best && ogg_mux->pulling->buffer) {
1190 GstOggPad *pad = ogg_mux->pulling;
1192 GstClockTime last_ts = GST_BUFFER_END_TIME (pad->buffer);
1194 /* if the next packet in the current page is going to make the page
1195 * too long, we need to flush */
1196 if (last_ts > ogg_mux->next_ts + ogg_mux->max_delay) {
1199 GST_LOG_OBJECT (pad->collect.pad,
1200 GST_GP_FORMAT " stored packet %" G_GINT64_FORMAT
1201 " will make page too long, flushing",
1202 GST_BUFFER_OFFSET_END (pad->buffer), pad->stream.packetno);
1204 while (ogg_stream_flush (&pad->stream, &page)) {
1205 /* end time of this page is the timestamp of the next buffer */
1206 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1207 /* Place page into the per-pad queue */
1208 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1210 /* increment the page number counter */
1212 /* mark other pages as delta */
1213 pad->first_delta = TRUE;
1215 pad->new_page = TRUE;
1216 ogg_mux->pulling = NULL;
1220 /* if we don't know which pad to pull on, use the best one */
1221 if (ogg_mux->pulling == NULL) {
1222 ogg_mux->pulling = best;
1223 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from best pad");
1225 /* remember timestamp and gp time of first buffer for this new pad */
1226 if (ogg_mux->pulling != NULL) {
1227 ogg_mux->next_ts = GST_BUFFER_TIMESTAMP (ogg_mux->pulling->buffer);
1228 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "updated times, next ts %"
1229 GST_TIME_FORMAT, GST_TIME_ARGS (ogg_mux->next_ts));
1231 /* no pad to pull on, send EOS */
1232 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1233 return GST_FLOW_WRONG_STATE;
1237 if (ogg_mux->need_headers) {
1238 ret = gst_ogg_mux_send_headers (ogg_mux);
1239 ogg_mux->need_headers = FALSE;
1242 /* we are pulling from a pad, continue to do so until a page
1243 * has been filled and queued */
1244 if (ogg_mux->pulling != NULL) {
1247 GstBuffer *buf, *tmpbuf;
1248 GstOggPad *pad = ogg_mux->pulling;
1250 gboolean force_flush;
1252 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from pad");
1254 /* now see if we have a buffer */
1257 GST_DEBUG_OBJECT (ogg_mux, "pad was EOS");
1258 ogg_mux->pulling = NULL;
1262 delta_unit = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
1263 duration = GST_BUFFER_DURATION (buf);
1265 /* if the current "next timestamp" on the pad is unset, then this is the
1266 * first packet on the new page. Update our pad's page timestamp */
1267 if (ogg_mux->pulling->timestamp == GST_CLOCK_TIME_NONE) {
1268 ogg_mux->pulling->timestamp = GST_BUFFER_TIMESTAMP (buf);
1269 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad,
1270 "updated pad timestamp to %" GST_TIME_FORMAT,
1271 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1273 /* create a packet from the buffer */
1274 packet.packet = GST_BUFFER_DATA (buf);
1275 packet.bytes = GST_BUFFER_SIZE (buf);
1276 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1277 if (packet.granulepos == -1)
1278 packet.granulepos = 0;
1279 /* mark BOS and packet number */
1280 packet.b_o_s = (pad->packetno == 0);
1281 packet.packetno = pad->packetno++;
1282 GST_LOG_OBJECT (pad->collect.pad, GST_GP_FORMAT
1283 " packet %" G_GINT64_FORMAT " (%ld bytes) created from buffer",
1284 packet.granulepos, packet.packetno, packet.bytes);
1286 packet.e_o_s = (pad->eos ? 1 : 0);
1289 /* we flush when we see a new keyframe */
1290 force_flush = (pad->prev_delta && !delta_unit) || pad->always_flush_page;
1291 if (duration != -1) {
1292 pad->duration += duration;
1293 /* if page duration exceeds max, flush page */
1294 if (pad->duration > ogg_mux->max_page_delay) {
1300 if (GST_BUFFER_IS_DISCONT (buf)) {
1301 GST_LOG_OBJECT (pad->collect.pad, "got discont");
1303 /* No public API for this; hack things in */
1304 pad->stream.pageno++;
1308 /* flush the currently built page if necessary */
1310 GST_LOG_OBJECT (pad->collect.pad,
1311 GST_GP_FORMAT " forced flush of page before this packet",
1312 GST_BUFFER_OFFSET_END (pad->buffer));
1313 while (ogg_stream_flush (&pad->stream, &page)) {
1314 /* end time of this page is the timestamp of the next buffer */
1315 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1316 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1319 /* increment the page number counter */
1321 /* mark other pages as delta */
1322 pad->first_delta = TRUE;
1324 pad->new_page = TRUE;
1327 /* if this is the first packet of a new page figure out the delta flag */
1328 if (pad->new_page) {
1330 /* mark the page as delta */
1331 pad->first_delta = TRUE;
1333 /* got a keyframe */
1334 if (ogg_mux->delta_pad == pad) {
1335 /* if we get it on the pad with deltaunits,
1336 * we mark the page as non delta */
1337 pad->first_delta = FALSE;
1338 } else if (ogg_mux->delta_pad != NULL) {
1339 /* if there are pads with delta frames, we
1340 * must mark this one as delta */
1341 pad->first_delta = TRUE;
1343 pad->first_delta = FALSE;
1346 pad->new_page = FALSE;
1349 /* save key unit to track delta->key unit transitions */
1350 pad->prev_delta = delta_unit;
1352 /* swap the packet in */
1353 if (packet.e_o_s == 1)
1354 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in EOS packet");
1355 if (packet.b_o_s == 1)
1356 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in BOS packet");
1358 ogg_stream_packetin (&pad->stream, &packet);
1360 gp_time = GST_BUFFER_OFFSET (pad->buffer);
1361 granulepos = GST_BUFFER_OFFSET_END (pad->buffer);
1362 timestamp = GST_BUFFER_TIMESTAMP (pad->buffer);
1364 GST_LOG_OBJECT (pad->collect.pad,
1365 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", gp time %"
1366 GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT " packetin'd",
1367 granulepos, packet.packetno, GST_TIME_ARGS (gp_time),
1368 GST_TIME_ARGS (timestamp));
1369 /* don't need the old buffer anymore */
1370 gst_buffer_unref (pad->buffer);
1371 /* store new readahead buffer */
1372 pad->buffer = tmpbuf;
1374 /* let ogg write out the pages now. The packet we got could end
1375 * up in more than one page so we need to write them all */
1376 if (ogg_stream_pageout (&pad->stream, &page) > 0) {
1377 /* we have a new page, so we need to timestamp it correctly.
1378 * if this fresh packet ends on this page, then the page's granulepos
1379 * comes from that packet, and we should set this buffer's timestamp */
1381 GST_LOG_OBJECT (pad->collect.pad,
1382 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", time %"
1383 GST_TIME_FORMAT ") caused new page",
1384 granulepos, packet.packetno, GST_TIME_ARGS (timestamp));
1385 GST_LOG_OBJECT (pad->collect.pad,
1386 GST_GP_FORMAT " new page %ld", ogg_page_granulepos (&page),
1387 pad->stream.pageno);
1389 if (ogg_page_granulepos (&page) == granulepos) {
1390 /* the packet we streamed in finishes on the current page,
1391 * because the page's granulepos is the granulepos of the last
1392 * packet completed on that page,
1393 * so update the timestamp that we will give to the page */
1394 GST_LOG_OBJECT (pad->collect.pad,
1396 " packet finishes on current page, updating gp time to %"
1397 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (gp_time));
1398 pad->gp_time = gp_time;
1400 GST_LOG_OBJECT (pad->collect.pad,
1402 " packet spans beyond current page, keeping old gp time %"
1403 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (pad->gp_time));
1407 /* end time of this page is the timestamp of the next buffer */
1408 pad->timestamp_end = timestamp;
1409 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page, pad->first_delta);
1411 /* mark next pages as delta */
1412 pad->first_delta = TRUE;
1414 /* use an inner loop here to flush the remaining pages and
1415 * mark them as delta frames as well */
1416 while (ogg_stream_pageout (&pad->stream, &page) > 0) {
1417 if (ogg_page_granulepos (&page) == granulepos) {
1418 /* the page has taken up the new packet completely, which means
1419 * the packet ends the page and we can update the gp time
1420 * before pushing out */
1421 pad->gp_time = gp_time;
1424 /* we have a complete page now, we can push the page
1425 * and make sure to pull on a new pad the next time around */
1426 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1428 /* increment the page number counter */
1431 /* need a new page as well */
1432 pad->new_page = TRUE;
1434 /* we're done pulling on this pad, make sure to choose a new
1435 * pad for pulling in the next iteration */
1436 ogg_mux->pulling = NULL;
1439 /* Update the gp time, if necessary, since any future page will have at
1440 * least this gp time.
1442 if (pad->gp_time < gp_time) {
1443 pad->gp_time = gp_time;
1444 GST_LOG_OBJECT (pad->collect.pad,
1445 "Updated running gp time of pad %" GST_PTR_FORMAT
1446 " to %" GST_TIME_FORMAT, pad->collect.pad, GST_TIME_ARGS (gp_time));
1455 * Checks if all pads are EOS'd by peeking.
1457 * Returns TRUE if all pads are EOS.
1460 all_pads_eos (GstCollectPads * pads)
1463 gboolean alleos = TRUE;
1468 GstCollectData *data = (GstCollectData *) walk->data;
1470 buf = gst_collect_pads_peek (pads, data);
1473 gst_buffer_unref (buf);
1482 /* This function is called when there is data on all pads.
1484 * It finds a pad to pull on, this is done by looking at the buffers
1485 * to decide which one to use, and using the 'oldest' one first. It then calls
1486 * gst_ogg_mux_process_best_pad() to process as much data as possible.
1488 * If all the pads have received EOS, it flushes out all data by continually
1489 * getting the best pad and calling gst_ogg_mux_process_best_pad() until they
1490 * are all empty, and then sends EOS.
1492 static GstFlowReturn
1493 gst_ogg_mux_collected (GstCollectPads * pads, GstOggMux * ogg_mux)
1499 GST_LOG_OBJECT (ogg_mux, "collected");
1501 activebefore = ogg_mux->active_pads;
1503 /* queue buffers on all pads; find a buffer with the lowest timestamp */
1504 best = gst_ogg_mux_queue_pads (ogg_mux);
1505 if (best && !best->buffer) {
1506 GST_DEBUG_OBJECT (ogg_mux, "No buffer available on best pad");
1511 return GST_FLOW_WRONG_STATE;
1514 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1516 if (ogg_mux->active_pads < activebefore) {
1517 /* If the active pad count went down, this mean at least one pad has gone
1518 * EOS. Since CollectPads only calls _collected() once when all pads are
1519 * EOS, and our code doesn't _pop() from all pads we need to check that by
1520 * peeking on all pads, else we won't be called again and the muxing will
1521 * not terminate (push out EOS). */
1523 /* if all the pads have been removed, flush all pending data */
1524 if ((ret == GST_FLOW_OK) && all_pads_eos (pads)) {
1525 GST_LOG_OBJECT (ogg_mux, "no pads remaining, flushing data");
1528 best = gst_ogg_mux_queue_pads (ogg_mux);
1530 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1531 } while ((ret == GST_FLOW_OK) && (best != NULL));
1533 GST_DEBUG_OBJECT (ogg_mux, "Pushing EOS");
1534 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1542 gst_ogg_mux_get_property (GObject * object,
1543 guint prop_id, GValue * value, GParamSpec * pspec)
1547 ogg_mux = GST_OGG_MUX (object);
1551 g_value_set_uint64 (value, ogg_mux->max_delay);
1553 case ARG_MAX_PAGE_DELAY:
1554 g_value_set_uint64 (value, ogg_mux->max_page_delay);
1557 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1563 gst_ogg_mux_set_property (GObject * object,
1564 guint prop_id, const GValue * value, GParamSpec * pspec)
1568 ogg_mux = GST_OGG_MUX (object);
1572 ogg_mux->max_delay = g_value_get_uint64 (value);
1574 case ARG_MAX_PAGE_DELAY:
1575 ogg_mux->max_page_delay = g_value_get_uint64 (value);
1578 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1583 /* reset all variables in the ogg pads. */
1585 gst_ogg_mux_init_collectpads (GstCollectPads * collect)
1589 walk = collect->data;
1591 GstOggPad *oggpad = (GstOggPad *) walk->data;
1593 ogg_stream_init (&oggpad->stream, oggpad->serial);
1594 oggpad->packetno = 0;
1596 oggpad->eos = FALSE;
1597 /* we assume there will be some control data first for this pad */
1598 oggpad->state = GST_OGG_PAD_STATE_CONTROL;
1599 oggpad->new_page = TRUE;
1600 oggpad->first_delta = FALSE;
1601 oggpad->prev_delta = FALSE;
1602 oggpad->pagebuffers = g_queue_new ();
1604 walk = g_slist_next (walk);
1608 /* Clear all buffers from the collectpads object */
1610 gst_ogg_mux_clear_collectpads (GstCollectPads * collect)
1614 for (walk = collect->data; walk; walk = g_slist_next (walk)) {
1615 GstOggPad *oggpad = (GstOggPad *) walk->data;
1618 ogg_stream_clear (&oggpad->stream);
1620 while ((buf = g_queue_pop_head (oggpad->pagebuffers)) != NULL) {
1621 gst_buffer_unref (buf);
1623 g_queue_free (oggpad->pagebuffers);
1624 oggpad->pagebuffers = NULL;
1626 if (oggpad->buffer) {
1627 gst_buffer_unref (oggpad->buffer);
1628 oggpad->buffer = NULL;
1630 if (oggpad->next_buffer) {
1631 gst_buffer_unref (oggpad->next_buffer);
1632 oggpad->next_buffer = NULL;
1637 static GstStateChangeReturn
1638 gst_ogg_mux_change_state (GstElement * element, GstStateChange transition)
1641 GstStateChangeReturn ret;
1643 ogg_mux = GST_OGG_MUX (element);
1645 switch (transition) {
1646 case GST_STATE_CHANGE_NULL_TO_READY:
1648 case GST_STATE_CHANGE_READY_TO_PAUSED:
1649 gst_ogg_mux_clear (ogg_mux);
1650 gst_ogg_mux_init_collectpads (ogg_mux->collect);
1651 gst_collect_pads_start (ogg_mux->collect);
1653 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1655 case GST_STATE_CHANGE_PAUSED_TO_READY:
1656 gst_collect_pads_stop (ogg_mux->collect);
1662 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1664 switch (transition) {
1665 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1667 case GST_STATE_CHANGE_PAUSED_TO_READY:
1668 gst_ogg_mux_clear_collectpads (ogg_mux->collect);
1670 case GST_STATE_CHANGE_READY_TO_NULL:
1680 gst_ogg_mux_plugin_init (GstPlugin * plugin)
1682 GST_DEBUG_CATEGORY_INIT (gst_ogg_mux_debug, "oggmux", 0, "ogg muxer");
1684 return gst_element_register (plugin, "oggmux", GST_RANK_PRIMARY,