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)
843 GstStructure *structure;
847 thepad = pad->collect.pad;
849 ogg_mux = GST_OGG_MUX (GST_PAD_PARENT (thepad));
851 GST_LOG_OBJECT (thepad, "getting headers");
853 caps = gst_pad_get_negotiated_caps (thepad);
855 const GValue *streamheader;
857 structure = gst_caps_get_structure (caps, 0);
858 streamheader = gst_structure_get_value (structure, "streamheader");
859 if (streamheader != NULL) {
860 GST_LOG_OBJECT (thepad, "got header");
861 if (G_VALUE_TYPE (streamheader) == GST_TYPE_ARRAY) {
862 GArray *bufarr = g_value_peek_pointer (streamheader);
865 GST_LOG_OBJECT (thepad, "got fixed list");
867 for (i = 0; i < bufarr->len; i++) {
868 GValue *bufval = &g_array_index (bufarr, GValue, i);
870 GST_LOG_OBJECT (thepad, "item %d", i);
871 if (G_VALUE_TYPE (bufval) == GST_TYPE_BUFFER) {
872 GstBuffer *buf = g_value_peek_pointer (bufval);
874 GST_LOG_OBJECT (thepad, "adding item %d to header list", i);
876 gst_buffer_ref (buf);
877 res = g_list_append (res, buf);
881 GST_LOG_OBJECT (thepad, "streamheader is not fixed list");
883 } else if (gst_structure_has_name (structure, "video/x-dirac")) {
884 res = g_list_append (res, pad->buffer);
885 pad->buffer = pad->next_buffer;
886 pad->next_buffer = NULL;
887 pad->always_flush_page = TRUE;
889 GST_LOG_OBJECT (thepad, "caps don't have streamheader");
891 gst_caps_unref (caps);
893 GST_LOG_OBJECT (thepad, "got empty caps as negotiated format");
899 gst_ogg_mux_set_header_on_caps (GstCaps * caps, GList * buffers)
901 GstStructure *structure;
902 GValue array = { 0 };
903 GList *walk = buffers;
905 caps = gst_caps_make_writable (caps);
907 structure = gst_caps_get_structure (caps, 0);
909 /* put buffers in a fixed list */
910 g_value_init (&array, GST_TYPE_ARRAY);
913 GstBuffer *buf = GST_BUFFER (walk->data);
915 GValue value = { 0 };
920 GST_LOG ("Setting IN_CAPS on buffer of length %d", GST_BUFFER_SIZE (buf));
921 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
923 g_value_init (&value, GST_TYPE_BUFFER);
924 copy = gst_buffer_copy (buf);
925 gst_value_set_buffer (&value, copy);
926 gst_buffer_unref (copy);
927 gst_value_array_append_value (&array, &value);
928 g_value_unset (&value);
930 gst_structure_set_value (structure, "streamheader", &array);
931 g_value_unset (&array);
937 * For each pad we need to write out one (small) header in one
938 * page that allows decoders to identify the type of the stream.
939 * After that we need to write out all extra info for the decoders.
940 * In the case of a codec that also needs data as configuration, we can
941 * find that info in the streamcaps.
942 * After writing the headers we must start a new page for the data.
945 gst_ogg_mux_send_headers (GstOggMux * mux)
948 GList *hbufs, *hwalk;
955 GST_LOG_OBJECT (mux, "collecting headers");
957 walk = mux->collect->data;
962 pad = (GstOggPad *) walk->data;
963 thepad = pad->collect.pad;
965 walk = g_slist_next (walk);
967 GST_LOG_OBJECT (mux, "looking at pad %s:%s", GST_DEBUG_PAD_NAME (thepad));
969 /* if the pad has no buffer, we don't care */
970 if (pad->buffer == NULL && pad->next_buffer == NULL)
973 /* now figure out the headers */
974 pad->headers = gst_ogg_mux_get_headers (pad);
977 GST_LOG_OBJECT (mux, "creating BOS pages");
978 walk = mux->collect->data;
986 GstStructure *structure;
989 pad = (GstOggPad *) walk->data;
990 thepad = pad->collect.pad;
991 caps = gst_pad_get_negotiated_caps (thepad);
992 structure = gst_caps_get_structure (caps, 0);
998 GST_LOG_OBJECT (thepad, "looping over headers");
1001 buf = GST_BUFFER (pad->headers->data);
1002 pad->headers = g_list_remove (pad->headers, buf);
1003 } else if (pad->buffer) {
1005 gst_buffer_ref (buf);
1006 } else if (pad->next_buffer) {
1007 buf = pad->next_buffer;
1008 gst_buffer_ref (buf);
1010 /* fixme -- should be caught in the previous list traversal. */
1011 GST_OBJECT_LOCK (pad);
1012 g_critical ("No headers or buffers on pad %s:%s",
1013 GST_DEBUG_PAD_NAME (pad));
1014 GST_OBJECT_UNLOCK (pad);
1018 /* create a packet from the buffer */
1019 packet.packet = GST_BUFFER_DATA (buf);
1020 packet.bytes = GST_BUFFER_SIZE (buf);
1021 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1022 if (packet.granulepos == -1)
1023 packet.granulepos = 0;
1024 /* mark BOS and packet number */
1025 packet.b_o_s = (pad->packetno == 0);
1026 packet.packetno = pad->packetno++;
1030 /* swap the packet in */
1031 ogg_stream_packetin (&pad->stream, &packet);
1032 gst_buffer_unref (buf);
1034 GST_LOG_OBJECT (thepad, "flushing out BOS page");
1035 if (!ogg_stream_flush (&pad->stream, &page))
1036 g_critical ("Could not flush BOS page");
1038 hbuf = gst_ogg_mux_buffer_from_page (mux, &page, FALSE);
1040 GST_LOG_OBJECT (mux, "swapped out page with mime type %s",
1041 gst_structure_get_name (structure));
1043 /* quick hack: put Theora and Dirac video pages at the front.
1044 * Ideally, we would have a settable enum for which Ogg
1045 * profile we work with, and order based on that.
1046 * (FIXME: if there is more than one video stream, shouldn't we only put
1047 * one's BOS into the first page, followed by an audio stream's BOS, and
1048 * only then followed by the remaining video and audio streams?) */
1049 if (gst_structure_has_name (structure, "video/x-theora")) {
1050 GST_DEBUG_OBJECT (thepad, "putting %s page at the front", "Theora");
1051 hbufs = g_list_prepend (hbufs, hbuf);
1052 pad->always_flush_page = TRUE;
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 */
1138 GstBuffer *buf = GST_BUFFER (hwalk->data);
1140 hwalk = hwalk->next;
1142 if ((ret = gst_ogg_mux_push_buffer (mux, buf)) != GST_FLOW_OK)
1145 g_list_free (hbufs);
1150 /* this function is called to process data on the best pending pad.
1154 * 1) store the selected pad and keep on pulling until we fill a
1155 * complete ogg page or the ogg page is filled above the max-delay
1156 * threshold. This is needed because the ogg spec says that
1157 * you should fill a complete page with data from the same logical
1158 * stream. When the page is filled, go back to 1).
1159 * 2) before filling a page, read ahead one more buffer to see if this
1160 * packet is the last of the stream. We need to do this because the ogg
1161 * spec mandates that the last packet should have the EOS flag set before
1162 * sending it to ogg. if pad->buffer is NULL we need to wait to find out
1163 * whether there are any more buffers.
1164 * 3) pages get queued on a per-pad queue. Every time a page is queued, a
1165 * dequeue is called, which will dequeue the oldest page on any pad, provided
1166 * that ALL pads have at least one marked page in the queue (or remaining
1169 static GstFlowReturn
1170 gst_ogg_mux_process_best_pad (GstOggMux * ogg_mux, GstOggPad * best)
1172 GstFlowReturn ret = GST_FLOW_OK;
1173 gboolean delta_unit;
1174 gint64 granulepos = 0;
1175 GstClockTime timestamp, gp_time;
1177 GST_LOG_OBJECT (ogg_mux, "best pad %" GST_PTR_FORMAT
1178 ", currently pulling from %" GST_PTR_FORMAT, best->collect.pad,
1181 /* best->buffer is non-NULL, either the pad is EOS's or there is a next
1183 if (best->next_buffer == NULL && !best->eos) {
1184 GST_WARNING_OBJECT (ogg_mux, "no subsequent buffer and EOS not reached");
1185 return GST_FLOW_WRONG_STATE;
1188 /* if we were already pulling from one pad, but the new "best" buffer is
1189 * from another pad, we need to check if we have reason to flush a page
1190 * for the pad we were pulling from before */
1191 if (ogg_mux->pulling && best &&
1192 ogg_mux->pulling != best && ogg_mux->pulling->buffer) {
1193 GstOggPad *pad = ogg_mux->pulling;
1195 GstClockTime last_ts = GST_BUFFER_END_TIME (pad->buffer);
1197 /* if the next packet in the current page is going to make the page
1198 * too long, we need to flush */
1199 if (last_ts > ogg_mux->next_ts + ogg_mux->max_delay) {
1202 GST_LOG_OBJECT (pad->collect.pad,
1203 GST_GP_FORMAT " stored packet %" G_GINT64_FORMAT
1204 " will make page too long, flushing",
1205 GST_BUFFER_OFFSET_END (pad->buffer), pad->stream.packetno);
1207 while (ogg_stream_flush (&pad->stream, &page)) {
1208 /* end time of this page is the timestamp of the next buffer */
1209 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1210 /* Place page into the per-pad queue */
1211 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1213 /* increment the page number counter */
1215 /* mark other pages as delta */
1216 pad->first_delta = TRUE;
1218 pad->new_page = TRUE;
1219 ogg_mux->pulling = NULL;
1223 /* if we don't know which pad to pull on, use the best one */
1224 if (ogg_mux->pulling == NULL) {
1225 ogg_mux->pulling = best;
1226 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from best pad");
1228 /* remember timestamp and gp time of first buffer for this new pad */
1229 if (ogg_mux->pulling != NULL) {
1230 ogg_mux->next_ts = GST_BUFFER_TIMESTAMP (ogg_mux->pulling->buffer);
1231 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "updated times, next ts %"
1232 GST_TIME_FORMAT, GST_TIME_ARGS (ogg_mux->next_ts));
1234 /* no pad to pull on, send EOS */
1235 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1236 return GST_FLOW_WRONG_STATE;
1240 if (ogg_mux->need_headers) {
1241 ret = gst_ogg_mux_send_headers (ogg_mux);
1242 ogg_mux->need_headers = FALSE;
1245 /* we are pulling from a pad, continue to do so until a page
1246 * has been filled and queued */
1247 if (ogg_mux->pulling != NULL) {
1250 GstBuffer *buf, *tmpbuf;
1251 GstOggPad *pad = ogg_mux->pulling;
1253 gboolean force_flush;
1255 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad, "pulling from pad");
1257 /* now see if we have a buffer */
1260 GST_DEBUG_OBJECT (ogg_mux, "pad was EOS");
1261 ogg_mux->pulling = NULL;
1265 delta_unit = GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
1266 duration = GST_BUFFER_DURATION (buf);
1268 /* if the current "next timestamp" on the pad is unset, then this is the
1269 * first packet on the new page. Update our pad's page timestamp */
1270 if (ogg_mux->pulling->timestamp == GST_CLOCK_TIME_NONE) {
1271 ogg_mux->pulling->timestamp = GST_BUFFER_TIMESTAMP (buf);
1272 GST_LOG_OBJECT (ogg_mux->pulling->collect.pad,
1273 "updated pad timestamp to %" GST_TIME_FORMAT,
1274 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1276 /* create a packet from the buffer */
1277 packet.packet = GST_BUFFER_DATA (buf);
1278 packet.bytes = GST_BUFFER_SIZE (buf);
1279 packet.granulepos = GST_BUFFER_OFFSET_END (buf);
1280 if (packet.granulepos == -1)
1281 packet.granulepos = 0;
1282 /* mark BOS and packet number */
1283 packet.b_o_s = (pad->packetno == 0);
1284 packet.packetno = pad->packetno++;
1285 GST_LOG_OBJECT (pad->collect.pad, GST_GP_FORMAT
1286 " packet %" G_GINT64_FORMAT " (%ld bytes) created from buffer",
1287 packet.granulepos, packet.packetno, packet.bytes);
1289 packet.e_o_s = (pad->eos ? 1 : 0);
1292 /* we flush when we see a new keyframe */
1293 force_flush = (pad->prev_delta && !delta_unit) || pad->always_flush_page;
1294 if (duration != -1) {
1295 pad->duration += duration;
1296 /* if page duration exceeds max, flush page */
1297 if (pad->duration > ogg_mux->max_page_delay) {
1303 if (GST_BUFFER_IS_DISCONT (buf)) {
1304 GST_LOG_OBJECT (pad->collect.pad, "got discont");
1306 /* No public API for this; hack things in */
1307 pad->stream.pageno++;
1311 /* flush the currently built page if necessary */
1313 GST_LOG_OBJECT (pad->collect.pad,
1314 GST_GP_FORMAT " forced flush of page before this packet",
1315 GST_BUFFER_OFFSET_END (pad->buffer));
1316 while (ogg_stream_flush (&pad->stream, &page)) {
1317 /* end time of this page is the timestamp of the next buffer */
1318 ogg_mux->pulling->timestamp_end = GST_BUFFER_TIMESTAMP (pad->buffer);
1319 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1322 /* increment the page number counter */
1324 /* mark other pages as delta */
1325 pad->first_delta = TRUE;
1327 pad->new_page = TRUE;
1330 /* if this is the first packet of a new page figure out the delta flag */
1331 if (pad->new_page) {
1333 /* mark the page as delta */
1334 pad->first_delta = TRUE;
1336 /* got a keyframe */
1337 if (ogg_mux->delta_pad == pad) {
1338 /* if we get it on the pad with deltaunits,
1339 * we mark the page as non delta */
1340 pad->first_delta = FALSE;
1341 } else if (ogg_mux->delta_pad != NULL) {
1342 /* if there are pads with delta frames, we
1343 * must mark this one as delta */
1344 pad->first_delta = TRUE;
1346 pad->first_delta = FALSE;
1349 pad->new_page = FALSE;
1352 /* save key unit to track delta->key unit transitions */
1353 pad->prev_delta = delta_unit;
1355 /* swap the packet in */
1356 if (packet.e_o_s == 1)
1357 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in EOS packet");
1358 if (packet.b_o_s == 1)
1359 GST_DEBUG_OBJECT (pad->collect.pad, "swapping in BOS packet");
1361 ogg_stream_packetin (&pad->stream, &packet);
1363 gp_time = GST_BUFFER_OFFSET (pad->buffer);
1364 granulepos = GST_BUFFER_OFFSET_END (pad->buffer);
1365 timestamp = GST_BUFFER_TIMESTAMP (pad->buffer);
1367 GST_LOG_OBJECT (pad->collect.pad,
1368 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", gp time %"
1369 GST_TIME_FORMAT ", timestamp %" GST_TIME_FORMAT " packetin'd",
1370 granulepos, packet.packetno, GST_TIME_ARGS (gp_time),
1371 GST_TIME_ARGS (timestamp));
1372 /* don't need the old buffer anymore */
1373 gst_buffer_unref (pad->buffer);
1374 /* store new readahead buffer */
1375 pad->buffer = tmpbuf;
1377 /* let ogg write out the pages now. The packet we got could end
1378 * up in more than one page so we need to write them all */
1379 if (ogg_stream_pageout (&pad->stream, &page) > 0) {
1380 /* we have a new page, so we need to timestamp it correctly.
1381 * if this fresh packet ends on this page, then the page's granulepos
1382 * comes from that packet, and we should set this buffer's timestamp */
1384 GST_LOG_OBJECT (pad->collect.pad,
1385 GST_GP_FORMAT " packet %" G_GINT64_FORMAT ", time %"
1386 GST_TIME_FORMAT ") caused new page",
1387 granulepos, packet.packetno, GST_TIME_ARGS (timestamp));
1388 GST_LOG_OBJECT (pad->collect.pad,
1389 GST_GP_FORMAT " new page %ld", ogg_page_granulepos (&page),
1390 pad->stream.pageno);
1392 if (ogg_page_granulepos (&page) == granulepos) {
1393 /* the packet we streamed in finishes on the current page,
1394 * because the page's granulepos is the granulepos of the last
1395 * packet completed on that page,
1396 * so update the timestamp that we will give to the page */
1397 GST_LOG_OBJECT (pad->collect.pad,
1399 " packet finishes on current page, updating gp time to %"
1400 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (gp_time));
1401 pad->gp_time = gp_time;
1403 GST_LOG_OBJECT (pad->collect.pad,
1405 " packet spans beyond current page, keeping old gp time %"
1406 GST_TIME_FORMAT, granulepos, GST_TIME_ARGS (pad->gp_time));
1410 /* end time of this page is the timestamp of the next buffer */
1411 pad->timestamp_end = timestamp;
1412 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page, pad->first_delta);
1414 /* mark next pages as delta */
1415 pad->first_delta = TRUE;
1417 /* use an inner loop here to flush the remaining pages and
1418 * mark them as delta frames as well */
1419 while (ogg_stream_pageout (&pad->stream, &page) > 0) {
1420 if (ogg_page_granulepos (&page) == granulepos) {
1421 /* the page has taken up the new packet completely, which means
1422 * the packet ends the page and we can update the gp time
1423 * before pushing out */
1424 pad->gp_time = gp_time;
1427 /* we have a complete page now, we can push the page
1428 * and make sure to pull on a new pad the next time around */
1429 ret = gst_ogg_mux_pad_queue_page (ogg_mux, pad, &page,
1431 /* increment the page number counter */
1434 /* need a new page as well */
1435 pad->new_page = TRUE;
1437 /* we're done pulling on this pad, make sure to choose a new
1438 * pad for pulling in the next iteration */
1439 ogg_mux->pulling = NULL;
1442 /* Update the gp time, if necessary, since any future page will have at
1443 * least this gp time.
1445 if (pad->gp_time < gp_time) {
1446 pad->gp_time = gp_time;
1447 GST_LOG_OBJECT (pad->collect.pad,
1448 "Updated running gp time of pad %" GST_PTR_FORMAT
1449 " to %" GST_TIME_FORMAT, pad->collect.pad, GST_TIME_ARGS (gp_time));
1458 * Checks if all pads are EOS'd by peeking.
1460 * Returns TRUE if all pads are EOS.
1463 all_pads_eos (GstCollectPads * pads)
1466 gboolean alleos = TRUE;
1471 GstCollectData *data = (GstCollectData *) walk->data;
1473 buf = gst_collect_pads_peek (pads, data);
1476 gst_buffer_unref (buf);
1485 /* This function is called when there is data on all pads.
1487 * It finds a pad to pull on, this is done by looking at the buffers
1488 * to decide which one to use, and using the 'oldest' one first. It then calls
1489 * gst_ogg_mux_process_best_pad() to process as much data as possible.
1491 * If all the pads have received EOS, it flushes out all data by continually
1492 * getting the best pad and calling gst_ogg_mux_process_best_pad() until they
1493 * are all empty, and then sends EOS.
1495 static GstFlowReturn
1496 gst_ogg_mux_collected (GstCollectPads * pads, GstOggMux * ogg_mux)
1502 GST_LOG_OBJECT (ogg_mux, "collected");
1504 activebefore = ogg_mux->active_pads;
1506 /* queue buffers on all pads; find a buffer with the lowest timestamp */
1507 best = gst_ogg_mux_queue_pads (ogg_mux);
1508 if (best && !best->buffer) {
1509 GST_DEBUG_OBJECT (ogg_mux, "No buffer available on best pad");
1514 return GST_FLOW_WRONG_STATE;
1517 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1519 if (ogg_mux->active_pads < activebefore) {
1520 /* If the active pad count went down, this mean at least one pad has gone
1521 * EOS. Since CollectPads only calls _collected() once when all pads are
1522 * EOS, and our code doesn't _pop() from all pads we need to check that by
1523 * peeking on all pads, else we won't be called again and the muxing will
1524 * not terminate (push out EOS). */
1526 /* if all the pads have been removed, flush all pending data */
1527 if ((ret == GST_FLOW_OK) && all_pads_eos (pads)) {
1528 GST_LOG_OBJECT (ogg_mux, "no pads remaining, flushing data");
1531 best = gst_ogg_mux_queue_pads (ogg_mux);
1533 ret = gst_ogg_mux_process_best_pad (ogg_mux, best);
1534 } while ((ret == GST_FLOW_OK) && (best != NULL));
1536 GST_DEBUG_OBJECT (ogg_mux, "Pushing EOS");
1537 gst_pad_push_event (ogg_mux->srcpad, gst_event_new_eos ());
1545 gst_ogg_mux_get_property (GObject * object,
1546 guint prop_id, GValue * value, GParamSpec * pspec)
1550 ogg_mux = GST_OGG_MUX (object);
1554 g_value_set_uint64 (value, ogg_mux->max_delay);
1556 case ARG_MAX_PAGE_DELAY:
1557 g_value_set_uint64 (value, ogg_mux->max_page_delay);
1560 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1566 gst_ogg_mux_set_property (GObject * object,
1567 guint prop_id, const GValue * value, GParamSpec * pspec)
1571 ogg_mux = GST_OGG_MUX (object);
1575 ogg_mux->max_delay = g_value_get_uint64 (value);
1577 case ARG_MAX_PAGE_DELAY:
1578 ogg_mux->max_page_delay = g_value_get_uint64 (value);
1581 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1586 /* reset all variables in the ogg pads. */
1588 gst_ogg_mux_init_collectpads (GstCollectPads * collect)
1592 walk = collect->data;
1594 GstOggPad *oggpad = (GstOggPad *) walk->data;
1596 ogg_stream_init (&oggpad->stream, oggpad->serial);
1597 oggpad->packetno = 0;
1599 oggpad->eos = FALSE;
1600 /* we assume there will be some control data first for this pad */
1601 oggpad->state = GST_OGG_PAD_STATE_CONTROL;
1602 oggpad->new_page = TRUE;
1603 oggpad->first_delta = FALSE;
1604 oggpad->prev_delta = FALSE;
1605 oggpad->pagebuffers = g_queue_new ();
1607 walk = g_slist_next (walk);
1611 /* Clear all buffers from the collectpads object */
1613 gst_ogg_mux_clear_collectpads (GstCollectPads * collect)
1617 for (walk = collect->data; walk; walk = g_slist_next (walk)) {
1618 GstOggPad *oggpad = (GstOggPad *) walk->data;
1621 ogg_stream_clear (&oggpad->stream);
1623 while ((buf = g_queue_pop_head (oggpad->pagebuffers)) != NULL) {
1624 gst_buffer_unref (buf);
1626 g_queue_free (oggpad->pagebuffers);
1627 oggpad->pagebuffers = NULL;
1629 if (oggpad->buffer) {
1630 gst_buffer_unref (oggpad->buffer);
1631 oggpad->buffer = NULL;
1633 if (oggpad->next_buffer) {
1634 gst_buffer_unref (oggpad->next_buffer);
1635 oggpad->next_buffer = NULL;
1640 static GstStateChangeReturn
1641 gst_ogg_mux_change_state (GstElement * element, GstStateChange transition)
1644 GstStateChangeReturn ret;
1646 ogg_mux = GST_OGG_MUX (element);
1648 switch (transition) {
1649 case GST_STATE_CHANGE_NULL_TO_READY:
1651 case GST_STATE_CHANGE_READY_TO_PAUSED:
1652 gst_ogg_mux_clear (ogg_mux);
1653 gst_ogg_mux_init_collectpads (ogg_mux->collect);
1654 gst_collect_pads_start (ogg_mux->collect);
1656 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1658 case GST_STATE_CHANGE_PAUSED_TO_READY:
1659 gst_collect_pads_stop (ogg_mux->collect);
1665 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1667 switch (transition) {
1668 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1670 case GST_STATE_CHANGE_PAUSED_TO_READY:
1671 gst_ogg_mux_clear_collectpads (ogg_mux->collect);
1673 case GST_STATE_CHANGE_READY_TO_NULL:
1683 gst_ogg_mux_plugin_init (GstPlugin * plugin)
1685 GST_DEBUG_CATEGORY_INIT (gst_ogg_mux_debug, "oggmux", 0, "ogg muxer");
1687 return gst_element_register (plugin, "oggmux", GST_RANK_PRIMARY,