2 * Copyright (C) 2008 Nokia Corporation. All rights reserved.
3 * Contact: Stefan Kost <stefan.kost@nokia.com>
4 * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
5 * Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
6 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 * SECTION:gstbaseparse
26 * @short_description: Base class for stream parsers
27 * @see_also: #GstBaseTransform
29 * This base class is for parser elements that process data and splits it
30 * into separate audio/video/whatever frames.
34 * <listitem><para>provides one sink pad and one source pad</para></listitem>
35 * <listitem><para>handles state changes</para></listitem>
36 * <listitem><para>can operate in pull mode or push mode</para></listitem>
37 * <listitem><para>handles seeking in both modes</para></listitem>
38 * <listitem><para>handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
40 * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
42 * <listitem><para>handles flushing</para></listitem>
45 * The purpose of this base class is to provide the basic functionality of
46 * a parser and share a lot of rather complex code.
48 * Description of the parsing mechanism:
51 * <itemizedlist><title>Set-up phase</title>
53 * GstBaseParse class calls @set_sink_caps to inform the subclass about
54 * incoming sinkpad caps. Subclass should set the srcpad caps accordingly.
57 * GstBaseParse calls @start to inform subclass that data processing is
61 * At least at this point subclass needs to tell the GstBaseParse class
62 * how big data chunks it wants to receive (min_frame_size). It can do
63 * this with gst_base_parse_set_min_frame_size().
66 * GstBaseParse class sets up appropriate data passing mode (pull/push)
67 * and starts to process the data.
73 * <title>Parsing phase</title>
75 * GstBaseParse gathers at least min_frame_size bytes of data either
76 * by pulling it from upstream or collecting buffers in an internal
80 * A buffer of (at least) min_frame_size bytes is passed to subclass with
81 * @check_valid_frame. Subclass checks the contents and returns TRUE
82 * if the buffer contains a valid frame. It also needs to set the
83 * @framesize according to the detected frame size. If buffer didn't
84 * contain a valid frame, this call must return FALSE and optionally
85 * set the @skipsize value to inform base class that how many bytes
86 * it needs to skip in order to find a valid frame. @framesize can always
87 * indicate a new minimum for current frame parsing. Indicating G_MAXUINT
88 * for requested amount means subclass simply needs best available
89 * subsequent data. In push mode this amounts to an additional input buffer
90 * (thus minimal additional latency), in pull mode this amounts to some
91 * arbitrary reasonable buffer size increase. The passed buffer
92 * is read-only. Note that @check_valid_frame might receive any small
93 * amount of input data when leftover data is being drained (e.g. at EOS).
96 * After valid frame is found, it will be passed again to subclass with
97 * @parse_frame call. Now subclass is responsible for parsing the
98 * frame contents and setting the caps, and buffer metadata (e.g.
99 * buffer timestamp and duration, or keyframe if applicable).
100 * (although the latter can also be done by GstBaseParse if it is
101 * appropriately configured, see below). Frame is provided with
102 * timestamp derived from upstream (as much as generally possible),
103 * duration obtained from configuration (see below), and offset
104 * if meaningful (in pull mode).
107 * Finally the buffer can be pushed downstream and the parsing loop starts
108 * over again. Just prior to actually pushing the buffer in question,
109 * it is passed to @pre_push_frame which gives subclass yet one
110 * last chance to examine buffer metadata, or to send some custom (tag)
111 * events, or to perform custom (segment) filtering.
114 * During the parsing process GstBaseParseClass will handle both srcpad
115 * and sinkpad events. They will be passed to subclass if @event or
116 * @src_event callbacks have been provided.
121 * <itemizedlist><title>Shutdown phase</title>
123 * GstBaseParse class calls @stop to inform the subclass that data
124 * parsing will be stopped.
130 * Subclass is responsible for providing pad template caps for
131 * source and sink pads. The pads need to be named "sink" and "src". It also
132 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
133 * when base class calls subclass' @set_sink_caps function).
135 * This base class uses #GST_FORMAT_DEFAULT as a meaning of frames. So,
136 * subclass conversion routine needs to know that conversion from
137 * #GST_FORMAT_TIME to #GST_FORMAT_DEFAULT must return the
138 * frame number that can be found from the given byte position.
140 * GstBaseParse uses subclasses conversion methods also for seeking (or
141 * otherwise uses its own default one, see also below).
143 * Subclass @start and @stop functions will be called to inform the beginning
144 * and end of data processing.
146 * Things that subclass need to take care of:
148 * <listitem><para>Provide pad templates</para></listitem>
150 * Fixate the source pad caps when appropriate
153 * Inform base class how big data chunks should be retrieved. This is
154 * done with gst_base_parse_set_min_frame_size() function.
157 * Examine data chunks passed to subclass with @check_valid_frame
158 * and tell if they contain a valid frame
161 * Set the caps and timestamp to frame that is passed to subclass with
162 * @parse_frame function.
164 * <listitem><para>Provide conversion functions</para></listitem>
166 * Update the duration information with gst_base_parse_set_duration()
169 * Optionally passthrough using gst_base_parse_set_passthrough()
172 * Configure various baseparse parameters using
173 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
174 * and gst_base_parse_set_frame_rate().
177 * In particular, if subclass is unable to determine a duration, but
178 * parsing (or specs) yields a frames per seconds rate, then this can be
179 * provided to GstBaseParse to enable it to cater for
180 * buffer time metadata (which will be taken from upstream as much as
181 * possible). Internally keeping track of frame durations and respective
182 * sizes that have been pushed provides GstBaseParse with an estimated
183 * bitrate. A default @convert (used if not overriden) will then use these
184 * rates to perform obvious conversions. These rates are also used to
185 * update (estimated) duration at regular frame intervals.
192 * - In push mode provide a queue of adapter-"queued" buffers for upstream
194 * - Queue buffers/events until caps are set
204 /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
205 * with newer GLib versions (>= 2.31.0) */
206 #define GLIB_DISABLE_DEPRECATION_WARNINGS
207 #include <gst/base/gstadapter.h>
209 #include "gstbaseparse.h"
211 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
213 #define MIN_FRAMES_TO_POST_BITRATE 10
214 #define TARGET_DIFFERENCE (20 * GST_SECOND)
216 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
217 #define GST_CAT_DEFAULT gst_base_parse_debug
219 /* Supported formats */
220 static const GstFormat fmtlist[] = {
227 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
228 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
230 struct _GstBaseParsePrivate
232 GstActivateMode pad_mode;
237 GstFormat duration_fmt;
238 gint64 estimated_duration;
239 gint64 estimated_drift;
241 guint min_frame_size;
242 gboolean passthrough;
244 gboolean has_timing_info;
245 guint fps_num, fps_den;
246 gint update_interval;
248 guint lead_in, lead_out;
249 GstClockTime lead_in_ts, lead_out_ts;
250 GstClockTime min_latency, max_latency;
258 GstClockTime next_ts;
259 GstClockTime prev_ts;
260 GstClockTime frame_duration;
261 gboolean seen_keyframe;
266 guint64 data_bytecount;
267 guint64 acc_duration;
268 GstClockTime first_frame_ts;
269 gint64 first_frame_offset;
271 gboolean post_min_bitrate;
272 gboolean post_avg_bitrate;
273 gboolean post_max_bitrate;
277 guint posted_avg_bitrate;
279 GList *pending_events;
281 /* frames/buffers that are queued and ready to go on OK */
282 GQueue queued_frames;
286 /* index entry storage, either ours or provided */
290 #if !GLIB_CHECK_VERSION (2, 31, 0)
291 GStaticMutex index_lock;
296 /* seek table entries only maintained if upstream is BYTE seekable */
297 gboolean upstream_seekable;
298 gboolean upstream_has_duration;
299 gint64 upstream_size;
300 /* minimum distance between two index entries */
301 GstClockTimeDiff idx_interval;
302 /* ts and offset of last entry added */
303 GstClockTime index_last_ts;
304 gint64 index_last_offset;
305 gboolean index_last_valid;
307 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
308 gboolean exact_position;
309 /* seek events are temporarily kept to match them with newsegments */
310 GSList *pending_seeks;
312 /* reverse playback */
313 GSList *buffers_pending;
314 GSList *buffers_queued;
315 GSList *buffers_send;
316 GstClockTime last_ts;
319 /* Newsegment event to be sent after SEEK */
320 GstEvent *pending_segment;
322 /* Segment event that closes the running segment prior to SEEK */
323 GstEvent *close_segment;
325 /* push mode helper frame */
326 GstBaseParseFrame frame;
328 /* TRUE if we're still detecting the format, i.e.
329 * if ::detect() is still called for future buffers */
331 GList *detect_buffers;
332 guint detect_buffers_size;
335 typedef struct _GstBaseParseSeek
340 GstClockTime start_ts;
343 #if !GLIB_CHECK_VERSION (2, 31, 0)
344 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
345 g_static_mutex_lock (&parse->priv->index_lock);
346 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
347 g_static_mutex_unlock (&parse->priv->index_lock);
349 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
350 g_mutex_lock (&parse->priv->index_lock);
351 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
352 g_mutex_unlock (&parse->priv->index_lock);
355 static GstElementClass *parent_class = NULL;
357 static void gst_base_parse_class_init (GstBaseParseClass * klass);
358 static void gst_base_parse_init (GstBaseParse * parse,
359 GstBaseParseClass * klass);
362 gst_base_parse_get_type (void)
364 static volatile gsize base_parse_type = 0;
366 if (g_once_init_enter (&base_parse_type)) {
367 static const GTypeInfo base_parse_info = {
368 sizeof (GstBaseParseClass),
369 (GBaseInitFunc) NULL,
370 (GBaseFinalizeFunc) NULL,
371 (GClassInitFunc) gst_base_parse_class_init,
374 sizeof (GstBaseParse),
376 (GInstanceInitFunc) gst_base_parse_init,
380 _type = g_type_register_static (GST_TYPE_ELEMENT,
381 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
382 g_once_init_leave (&base_parse_type, _type);
384 return (GType) base_parse_type;
387 static void gst_base_parse_finalize (GObject * object);
389 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
390 GstStateChange transition);
391 static void gst_base_parse_reset (GstBaseParse * parse);
393 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
394 static GstIndex *gst_base_parse_get_index (GstElement * element);
396 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad);
397 static gboolean gst_base_parse_sink_activate_push (GstPad * pad,
399 static gboolean gst_base_parse_sink_activate_pull (GstPad * pad,
401 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
403 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
405 static gboolean gst_base_parse_src_event (GstPad * pad, GstEvent * event);
406 static gboolean gst_base_parse_sink_event (GstPad * pad, GstEvent * event);
407 static gboolean gst_base_parse_query (GstPad * pad, GstQuery * query);
408 static gboolean gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps);
409 static GstCaps *gst_base_parse_sink_getcaps (GstPad * pad);
410 static const GstQueryType *gst_base_parse_get_querytypes (GstPad * pad);
412 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstBuffer * buffer);
413 static void gst_base_parse_loop (GstPad * pad);
415 static gboolean gst_base_parse_check_frame (GstBaseParse * parse,
416 GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
417 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
418 GstBaseParseFrame * frame);
420 static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
423 static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
426 static void gst_base_parse_drain (GstBaseParse * parse);
428 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
429 gboolean post_min, gboolean post_avg, gboolean post_max);
431 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
432 GstClockTime time, gboolean before, GstClockTime * _ts);
433 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
434 GstClockTime * _time, gint64 * _offset);
436 static GstFlowReturn gst_base_parse_process_fragment (GstBaseParse * parse,
439 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
442 gst_base_parse_clear_queues (GstBaseParse * parse)
444 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
445 g_slist_free (parse->priv->buffers_queued);
446 parse->priv->buffers_queued = NULL;
447 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
449 g_slist_free (parse->priv->buffers_pending);
450 parse->priv->buffers_pending = NULL;
451 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
452 g_slist_free (parse->priv->buffers_send);
453 parse->priv->buffers_send = NULL;
455 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
456 g_list_free (parse->priv->detect_buffers);
457 parse->priv->detect_buffers = NULL;
458 parse->priv->detect_buffers_size = 0;
460 g_queue_foreach (&parse->priv->queued_frames,
461 (GFunc) gst_base_parse_frame_free, NULL);
462 g_queue_clear (&parse->priv->queued_frames);
466 gst_base_parse_finalize (GObject * object)
468 GstBaseParse *parse = GST_BASE_PARSE (object);
471 g_object_unref (parse->priv->adapter);
473 if (parse->priv->pending_segment) {
474 p_ev = &parse->priv->pending_segment;
475 gst_event_replace (p_ev, NULL);
477 if (parse->priv->close_segment) {
478 p_ev = &parse->priv->close_segment;
479 gst_event_replace (p_ev, NULL);
482 if (parse->priv->cache) {
483 gst_buffer_unref (parse->priv->cache);
484 parse->priv->cache = NULL;
487 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
489 g_list_free (parse->priv->pending_events);
490 parse->priv->pending_events = NULL;
492 if (parse->priv->index) {
493 gst_object_unref (parse->priv->index);
494 parse->priv->index = NULL;
496 #if !GLIB_CHECK_VERSION (2, 31, 0)
497 g_static_mutex_free (&parse->priv->index_lock);
499 g_mutex_clear (&parse->priv->index_lock);
502 gst_base_parse_clear_queues (parse);
504 G_OBJECT_CLASS (parent_class)->finalize (object);
508 gst_base_parse_class_init (GstBaseParseClass * klass)
510 GObjectClass *gobject_class;
511 GstElementClass *gstelement_class;
513 gobject_class = G_OBJECT_CLASS (klass);
514 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
515 parent_class = g_type_class_peek_parent (klass);
516 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
518 gstelement_class = (GstElementClass *) klass;
519 gstelement_class->change_state =
520 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
521 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
522 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
524 /* Default handlers */
525 klass->check_valid_frame = gst_base_parse_check_frame;
526 klass->parse_frame = gst_base_parse_parse_frame;
527 klass->src_event = gst_base_parse_src_eventfunc;
528 klass->convert = gst_base_parse_convert_default;
530 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
531 "baseparse element");
535 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
537 GstPadTemplate *pad_template;
539 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
541 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
544 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
545 g_return_if_fail (pad_template != NULL);
546 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
547 gst_pad_set_event_function (parse->sinkpad,
548 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
549 gst_pad_set_setcaps_function (parse->sinkpad,
550 GST_DEBUG_FUNCPTR (gst_base_parse_sink_setcaps));
551 gst_pad_set_getcaps_function (parse->sinkpad,
552 GST_DEBUG_FUNCPTR (gst_base_parse_sink_getcaps));
553 gst_pad_set_chain_function (parse->sinkpad,
554 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
555 gst_pad_set_activate_function (parse->sinkpad,
556 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
557 gst_pad_set_activatepush_function (parse->sinkpad,
558 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_push));
559 gst_pad_set_activatepull_function (parse->sinkpad,
560 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_pull));
561 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
563 GST_DEBUG_OBJECT (parse, "sinkpad created");
566 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
567 g_return_if_fail (pad_template != NULL);
568 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
569 gst_pad_set_event_function (parse->srcpad,
570 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
571 gst_pad_set_query_type_function (parse->srcpad,
572 GST_DEBUG_FUNCPTR (gst_base_parse_get_querytypes));
573 gst_pad_set_query_function (parse->srcpad,
574 GST_DEBUG_FUNCPTR (gst_base_parse_query));
575 gst_pad_use_fixed_caps (parse->srcpad);
576 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
577 GST_DEBUG_OBJECT (parse, "src created");
579 g_queue_init (&parse->priv->queued_frames);
581 parse->priv->adapter = gst_adapter_new ();
583 parse->priv->pad_mode = GST_ACTIVATE_NONE;
585 #if !GLIB_CHECK_VERSION (2, 31, 0)
586 g_static_mutex_init (&parse->priv->index_lock);
588 g_mutex_init (&parse->priv->index_lock);
592 gst_base_parse_reset (parse);
593 GST_DEBUG_OBJECT (parse, "init ok");
596 static GstBaseParseFrame *
597 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
599 GstBaseParseFrame *copy;
601 copy = g_slice_dup (GstBaseParseFrame, frame);
602 copy->buffer = gst_buffer_ref (frame->buffer);
603 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
605 GST_TRACE ("copied frame %p -> %p", frame, copy);
611 gst_base_parse_frame_free (GstBaseParseFrame * frame)
613 GST_TRACE ("freeing frame %p", frame);
616 gst_buffer_unref (frame->buffer);
617 frame->buffer = NULL;
620 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
621 g_slice_free (GstBaseParseFrame, frame);
623 memset (frame, 0, sizeof (*frame));
628 gst_base_parse_frame_get_type (void)
630 static volatile gsize frame_type = 0;
632 if (g_once_init_enter (&frame_type)) {
635 _type = g_boxed_type_register_static ("GstBaseParseFrame",
636 (GBoxedCopyFunc) gst_base_parse_frame_copy,
637 (GBoxedFreeFunc) gst_base_parse_frame_free);
638 g_once_init_leave (&frame_type, _type);
640 return (GType) frame_type;
644 * gst_base_parse_frame_init:
645 * @frame: #GstBaseParseFrame.
647 * Sets a #GstBaseParseFrame to initial state. Currently this means
648 * all public fields are zero-ed and a private flag is set to make
649 * sure gst_base_parse_frame_free() only frees the contents but not
650 * the actual frame. Use this function to initialise a #GstBaseParseFrame
651 * allocated on the stack.
656 gst_base_parse_frame_init (GstBaseParseFrame * frame)
658 memset (frame, 0, sizeof (GstBaseParseFrame));
659 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
660 GST_TRACE ("inited frame %p", frame);
664 * gst_base_parse_frame_new:
665 * @buffer: (transfer none): a #GstBuffer
667 * @overhead: number of bytes in this frame which should be counted as
668 * metadata overhead, ie. not used to calculate the average bitrate.
669 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
671 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
672 * elements written in C should usually allocate the frame on the stack and
673 * then use gst_base_parse_frame_init() to initialise it.
675 * Returns: a newly-allocated #GstBaseParseFrame. Free with
676 * gst_base_parse_frame_free() when no longer needed, unless you gave
677 * away ownership to gst_base_parse_push_frame().
682 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
685 GstBaseParseFrame *frame;
687 frame = g_slice_new0 (GstBaseParseFrame);
688 frame->buffer = gst_buffer_ref (buffer);
690 GST_TRACE ("created frame %p", frame);
695 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
698 gst_buffer_replace (&frame->buffer, buf);
702 /* set flags one by one for clarity */
703 if (G_UNLIKELY (parse->priv->drain))
704 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
706 /* losing sync is pretty much a discont (and vice versa), no ? */
707 if (G_UNLIKELY (parse->priv->discont))
708 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
712 gst_base_parse_reset (GstBaseParse * parse)
714 GST_OBJECT_LOCK (parse);
715 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
716 parse->priv->duration = -1;
717 parse->priv->min_frame_size = 1;
718 parse->priv->discont = TRUE;
719 parse->priv->flushing = FALSE;
720 parse->priv->offset = 0;
721 parse->priv->sync_offset = 0;
722 parse->priv->update_interval = -1;
723 parse->priv->fps_num = parse->priv->fps_den = 0;
724 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
725 parse->priv->lead_in = parse->priv->lead_out = 0;
726 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
727 parse->priv->bitrate = 0;
728 parse->priv->framecount = 0;
729 parse->priv->bytecount = 0;
730 parse->priv->acc_duration = 0;
731 parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
732 parse->priv->first_frame_offset = -1;
733 parse->priv->estimated_duration = -1;
734 parse->priv->estimated_drift = 0;
735 parse->priv->next_ts = 0;
736 parse->priv->syncable = TRUE;
737 parse->priv->passthrough = FALSE;
738 parse->priv->has_timing_info = FALSE;
739 parse->priv->post_min_bitrate = TRUE;
740 parse->priv->post_avg_bitrate = TRUE;
741 parse->priv->post_max_bitrate = TRUE;
742 parse->priv->min_bitrate = G_MAXUINT;
743 parse->priv->max_bitrate = 0;
744 parse->priv->avg_bitrate = 0;
745 parse->priv->posted_avg_bitrate = 0;
747 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
748 parse->priv->index_last_offset = -1;
749 parse->priv->index_last_valid = TRUE;
750 parse->priv->upstream_seekable = FALSE;
751 parse->priv->upstream_size = 0;
752 parse->priv->upstream_has_duration = FALSE;
753 parse->priv->idx_interval = 0;
754 parse->priv->exact_position = TRUE;
755 parse->priv->seen_keyframe = FALSE;
757 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
758 parse->priv->last_offset = 0;
760 if (parse->priv->pending_segment) {
761 gst_event_unref (parse->priv->pending_segment);
762 parse->priv->pending_segment = NULL;
765 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
767 g_list_free (parse->priv->pending_events);
768 parse->priv->pending_events = NULL;
770 if (parse->priv->cache) {
771 gst_buffer_unref (parse->priv->cache);
772 parse->priv->cache = NULL;
775 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
776 g_slist_free (parse->priv->pending_seeks);
777 parse->priv->pending_seeks = NULL;
779 if (parse->priv->adapter)
780 gst_adapter_clear (parse->priv->adapter);
782 /* we know it is not alloc'ed, but maybe other stuff to free, some day ... */
783 parse->priv->frame._private_flags |=
784 GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
785 gst_base_parse_frame_free (&parse->priv->frame);
787 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
788 g_list_free (parse->priv->detect_buffers);
789 parse->priv->detect_buffers = NULL;
790 parse->priv->detect_buffers_size = 0;
791 GST_OBJECT_UNLOCK (parse);
794 /* gst_base_parse_check_frame:
795 * @parse: #GstBaseParse.
796 * @buffer: GstBuffer.
797 * @framesize: This will be set to tell the found frame size in bytes.
798 * @skipsize: Output parameter that tells how much data needs to be skipped
799 * in order to find the following frame header.
801 * Default callback for check_valid_frame.
803 * Returns: Always TRUE.
806 gst_base_parse_check_frame (GstBaseParse * parse,
807 GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
809 *framesize = GST_BUFFER_SIZE (frame->buffer);
815 /* gst_base_parse_parse_frame:
816 * @parse: #GstBaseParse.
817 * @buffer: #GstBuffer.
819 * Default callback for parse_frame.
822 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
824 GstBuffer *buffer = frame->buffer;
826 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
827 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
828 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
830 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
831 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
832 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
837 /* gst_base_parse_convert:
838 * @parse: #GstBaseParse.
839 * @src_format: #GstFormat describing the source format.
840 * @src_value: Source value to be converted.
841 * @dest_format: #GstFormat defining the converted format.
842 * @dest_value: Pointer where the conversion result will be put.
844 * Converts using configured "convert" vmethod in #GstBaseParse class.
846 * Returns: TRUE if conversion was successful.
849 gst_base_parse_convert (GstBaseParse * parse,
850 GstFormat src_format,
851 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
853 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
856 g_return_val_if_fail (dest_value != NULL, FALSE);
861 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
863 #ifndef GST_DISABLE_GST_DEBUG
866 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
867 GST_LOG_OBJECT (parse,
868 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
869 GST_TIME_ARGS (src_value), *dest_value);
870 } else if (dest_format == GST_FORMAT_TIME &&
871 src_format == GST_FORMAT_BYTES) {
872 GST_LOG_OBJECT (parse,
873 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
874 src_value, GST_TIME_ARGS (*dest_value));
876 GST_LOG_OBJECT (parse,
877 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
878 GST_STR_NULL (gst_format_get_name (src_format)),
879 GST_STR_NULL (gst_format_get_name (dest_format)),
880 src_value, *dest_value);
883 GST_DEBUG_OBJECT (parse, "conversion failed");
891 /* gst_base_parse_sink_event:
892 * @pad: #GstPad that received the event.
893 * @event: #GstEvent to be handled.
895 * Handler for sink pad events.
897 * Returns: TRUE if the event was handled.
900 gst_base_parse_sink_event (GstPad * pad, GstEvent * event)
903 GstBaseParseClass *bclass;
904 gboolean handled = FALSE;
907 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
908 bclass = GST_BASE_PARSE_GET_CLASS (parse);
910 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
911 GST_EVENT_TYPE_NAME (event));
913 /* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
915 if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
916 && GST_EVENT_TYPE (event) != GST_EVENT_NEWSEGMENT
917 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
918 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
920 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
921 /* See if any bitrate tags were posted */
922 gst_base_parse_handle_tag (parse, event);
924 parse->priv->pending_events =
925 g_list_append (parse->priv->pending_events, event);
929 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
930 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
931 /* We've not posted bitrate tags yet - do so now */
932 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
935 handled = bclass->event (parse, event);
938 handled = gst_base_parse_sink_eventfunc (parse, event);
941 ret = gst_pad_event_default (pad, event);
944 gst_object_unref (parse);
945 GST_DEBUG_OBJECT (parse, "event handled");
950 /* gst_base_parse_sink_eventfunc:
951 * @parse: #GstBaseParse.
952 * @event: #GstEvent to be handled.
954 * Element-level event handler function.
956 * The event will be unreffed only if it has been handled and this
957 * function returns %TRUE
959 * Returns: %TRUE if the event was handled and not need forwarding.
962 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
964 gboolean handled = FALSE;
967 switch (GST_EVENT_TYPE (event)) {
968 case GST_EVENT_NEWSEGMENT:
970 gdouble rate, applied_rate;
972 gint64 start, stop, pos, next_ts, offset = 0;
975 gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
976 &format, &start, &stop, &pos);
978 GST_DEBUG_OBJECT (parse, "newseg rate %g, applied rate %g, "
979 "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
980 ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
981 GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
983 if (format == GST_FORMAT_BYTES) {
984 GstClockTime seg_start, seg_stop;
985 GstBaseParseSeek *seek = NULL;
988 /* stop time is allowed to be open-ended, but not start & pos */
989 seg_stop = GST_CLOCK_TIME_NONE;
993 GST_OBJECT_LOCK (parse);
994 for (node = parse->priv->pending_seeks; node; node = node->next) {
995 GstBaseParseSeek *tmp = node->data;
997 if (tmp->offset == pos) {
1002 parse->priv->pending_seeks =
1003 g_slist_remove (parse->priv->pending_seeks, seek);
1004 GST_OBJECT_UNLOCK (parse);
1007 GST_DEBUG_OBJECT (parse,
1008 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1009 seek->accurate ? " accurate" : "", &seek->segment);
1010 seg_start = seek->segment.start;
1011 seg_stop = seek->segment.stop;
1012 next_ts = seek->start_ts;
1013 parse->priv->exact_position = seek->accurate;
1016 /* best attempt convert */
1017 /* as these are only estimates, stop is kept open-ended to avoid
1018 * premature cutting */
1019 gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
1020 GST_FORMAT_TIME, (gint64 *) & seg_start);
1021 parse->priv->exact_position = (start == 0);
1022 next_ts = seg_start;
1025 gst_event_unref (event);
1026 event = gst_event_new_new_segment_full (update, rate, applied_rate,
1027 GST_FORMAT_TIME, seg_start, seg_stop, seg_start);
1028 format = GST_FORMAT_TIME;
1031 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
1032 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT,
1033 GST_TIME_ARGS (seg_start), GST_TIME_ARGS (seg_stop));
1034 } else if (format != GST_FORMAT_TIME) {
1035 /* Unknown incoming segment format. Output a default open-ended
1037 gst_event_unref (event);
1038 event = gst_event_new_new_segment_full (update, rate, applied_rate,
1039 GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
1040 format = GST_FORMAT_TIME;
1041 next_ts = start = 0;
1042 stop = GST_CLOCK_TIME_NONE;
1044 /* not considered BYTE seekable if it is talking to us in TIME,
1045 * whatever else it might claim */
1046 parse->priv->upstream_seekable = FALSE;
1050 gst_segment_set_newsegment_full (&parse->segment, update, rate,
1051 applied_rate, format, start, stop, start);
1053 /* save the segment for later, right before we push a new buffer so that
1054 * the caps are fixed and the next linked element can receive
1056 eventp = &parse->priv->pending_segment;
1057 gst_event_replace (eventp, event);
1058 gst_event_unref (event);
1061 /* but finish the current segment */
1062 GST_DEBUG_OBJECT (parse, "draining current segment");
1063 if (parse->segment.rate > 0.0)
1064 gst_base_parse_drain (parse);
1066 gst_base_parse_process_fragment (parse, FALSE);
1067 gst_adapter_clear (parse->priv->adapter);
1068 parse->priv->offset = offset;
1069 parse->priv->sync_offset = offset;
1070 parse->priv->next_ts = next_ts;
1071 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1072 parse->priv->discont = TRUE;
1073 parse->priv->seen_keyframe = FALSE;
1077 case GST_EVENT_FLUSH_START:
1078 parse->priv->flushing = TRUE;
1079 handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
1081 gst_event_unref (event);
1082 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1083 GST_PAD_STREAM_LOCK (parse->srcpad);
1084 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1088 case GST_EVENT_FLUSH_STOP:
1089 gst_adapter_clear (parse->priv->adapter);
1090 gst_base_parse_clear_queues (parse);
1091 parse->priv->flushing = FALSE;
1092 parse->priv->discont = TRUE;
1093 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1094 parse->priv->frame._private_flags |=
1095 GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
1096 gst_base_parse_frame_free (&parse->priv->frame);
1100 if (parse->segment.rate > 0.0)
1101 gst_base_parse_drain (parse);
1103 gst_base_parse_process_fragment (parse, FALSE);
1105 /* If we STILL have zero frames processed, fire an error */
1106 if (parse->priv->framecount == 0) {
1107 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1108 ("No valid frames found before end of stream"), (NULL));
1110 /* newsegment before eos */
1111 if (parse->priv->pending_segment) {
1112 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1113 parse->priv->pending_segment = NULL;
1125 /* gst_base_parse_src_event:
1126 * @pad: #GstPad that received the event.
1127 * @event: #GstEvent that was received.
1129 * Handler for source pad events.
1131 * Returns: TRUE if the event was handled.
1134 gst_base_parse_src_event (GstPad * pad, GstEvent * event)
1136 GstBaseParse *parse;
1137 GstBaseParseClass *bclass;
1138 gboolean handled = FALSE;
1139 gboolean ret = TRUE;
1141 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
1142 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1144 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1145 GST_EVENT_TYPE_NAME (event));
1147 if (bclass->src_event)
1148 handled = bclass->src_event (parse, event);
1151 ret = gst_pad_event_default (pad, event);
1153 gst_object_unref (parse);
1158 gst_base_parse_is_seekable (GstBaseParse * parse)
1160 /* FIXME: could do more here, e.g. check index or just send data from 0
1161 * in pull mode and let decoder/sink clip */
1162 return parse->priv->syncable;
1165 /* gst_base_parse_src_eventfunc:
1166 * @parse: #GstBaseParse.
1167 * @event: #GstEvent that was received.
1169 * Default srcpad event handler.
1171 * Returns: TRUE if the event was handled and can be dropped.
1174 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1176 gboolean handled = FALSE;
1178 switch (GST_EVENT_TYPE (event)) {
1179 case GST_EVENT_SEEK:
1181 if (gst_base_parse_is_seekable (parse)) {
1182 handled = gst_base_parse_handle_seek (parse, event);
1194 * gst_base_parse_convert_default:
1195 * @parse: #GstBaseParse.
1196 * @src_format: #GstFormat describing the source format.
1197 * @src_value: Source value to be converted.
1198 * @dest_format: #GstFormat defining the converted format.
1199 * @dest_value: Pointer where the conversion result will be put.
1201 * Default implementation of "convert" vmethod in #GstBaseParse class.
1203 * Returns: TRUE if conversion was successful.
1208 gst_base_parse_convert_default (GstBaseParse * parse,
1209 GstFormat src_format,
1210 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1212 gboolean ret = FALSE;
1213 guint64 bytes, duration;
1215 if (G_UNLIKELY (src_format == dest_format)) {
1216 *dest_value = src_value;
1220 if (G_UNLIKELY (src_value == -1)) {
1225 if (G_UNLIKELY (src_value == 0)) {
1230 /* need at least some frames */
1231 if (!parse->priv->framecount)
1234 duration = parse->priv->acc_duration / GST_MSECOND;
1235 bytes = parse->priv->bytecount;
1237 if (G_UNLIKELY (!duration || !bytes))
1240 if (src_format == GST_FORMAT_BYTES) {
1241 if (dest_format == GST_FORMAT_TIME) {
1242 /* BYTES -> TIME conversion */
1243 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1244 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1245 *dest_value *= GST_MSECOND;
1246 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1247 *dest_value / GST_MSECOND);
1250 } else if (src_format == GST_FORMAT_TIME) {
1251 if (dest_format == GST_FORMAT_BYTES) {
1252 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1253 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1255 GST_DEBUG_OBJECT (parse,
1256 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1257 src_value / GST_MSECOND, *dest_value);
1260 } else if (src_format == GST_FORMAT_DEFAULT) {
1261 /* DEFAULT == frame-based */
1262 if (dest_format == GST_FORMAT_TIME) {
1263 if (parse->priv->fps_den) {
1264 *dest_value = gst_util_uint64_scale (src_value,
1265 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1268 } else if (dest_format == GST_FORMAT_BYTES) {
1276 gst_base_parse_update_duration (GstBaseParse * baseparse)
1279 GstBaseParse *parse;
1281 parse = GST_BASE_PARSE (baseparse);
1283 peer = gst_pad_get_peer (parse->sinkpad);
1285 GstFormat pformat = GST_FORMAT_BYTES;
1286 gboolean qres = FALSE;
1287 gint64 ptot, dest_value;
1289 qres = gst_pad_query_duration (peer, &pformat, &ptot);
1290 gst_object_unref (GST_OBJECT (peer));
1292 if (gst_base_parse_convert (parse, pformat, ptot,
1293 GST_FORMAT_TIME, &dest_value)) {
1295 /* inform if duration changed, but try to avoid spamming */
1296 parse->priv->estimated_drift +=
1297 dest_value - parse->priv->estimated_duration;
1298 if (parse->priv->estimated_drift > GST_SECOND ||
1299 parse->priv->estimated_drift < -GST_SECOND) {
1300 gst_element_post_message (GST_ELEMENT (parse),
1301 gst_message_new_duration (GST_OBJECT (parse),
1302 GST_FORMAT_TIME, dest_value));
1303 parse->priv->estimated_drift = 0;
1305 parse->priv->estimated_duration = dest_value;
1306 GST_LOG_OBJECT (parse,
1307 "updated estimated duration to %" GST_TIME_FORMAT,
1308 GST_TIME_ARGS (dest_value));
1315 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1316 gboolean post_avg, gboolean post_max)
1318 GstTagList *taglist = NULL;
1320 if (post_min && parse->priv->post_min_bitrate) {
1321 taglist = gst_tag_list_new ();
1323 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1324 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1327 if (post_avg && parse->priv->post_avg_bitrate) {
1328 if (taglist == NULL)
1329 taglist = gst_tag_list_new ();
1331 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1332 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1333 parse->priv->avg_bitrate, NULL);
1336 if (post_max && parse->priv->post_max_bitrate) {
1337 if (taglist == NULL)
1338 taglist = gst_tag_list_new ();
1340 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1341 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1344 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1345 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1346 parse->priv->max_bitrate);
1348 if (taglist != NULL) {
1349 gst_element_found_tags_for_pad (GST_ELEMENT_CAST (parse), parse->srcpad,
1354 /* gst_base_parse_update_bitrates:
1355 * @parse: #GstBaseParse.
1356 * @buffer: Current frame as a #GstBuffer
1358 * Keeps track of the minimum and maximum bitrates, and also maintains a
1359 * running average bitrate of the stream so far.
1362 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1364 /* Only update the tag on a 10 kbps delta */
1365 static const gint update_threshold = 10000;
1367 guint64 data_len, frame_dur;
1368 gint overhead, frame_bitrate, old_avg_bitrate;
1369 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1370 GstBuffer *buffer = frame->buffer;
1372 overhead = frame->overhead;
1376 data_len = GST_BUFFER_SIZE (buffer) - overhead;
1377 parse->priv->data_bytecount += data_len;
1379 /* duration should be valid by now,
1380 * either set by subclass or maybe based on fps settings */
1381 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1382 /* Calculate duration of a frame from buffer properties */
1383 frame_dur = GST_BUFFER_DURATION (buffer);
1384 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1385 parse->priv->acc_duration;
1388 /* No way to figure out frame duration (is this even possible?) */
1392 /* override if subclass provided bitrate, e.g. metadata based */
1393 if (parse->priv->bitrate) {
1394 parse->priv->avg_bitrate = parse->priv->bitrate;
1395 /* spread this (confirmed) info ASAP */
1396 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1397 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1401 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1405 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1406 parse->priv->avg_bitrate);
1408 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1410 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1411 /* always post all at threshold time */
1412 update_min = update_max = update_avg = TRUE;
1415 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1416 if (frame_bitrate < parse->priv->min_bitrate) {
1417 parse->priv->min_bitrate = frame_bitrate;
1421 if (frame_bitrate > parse->priv->max_bitrate) {
1422 parse->priv->max_bitrate = frame_bitrate;
1426 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1427 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1428 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1433 if ((update_min || update_avg || update_max))
1434 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1436 /* If average bitrate changes that much and no valid (time) duration provided,
1437 * then post a new duration message so applications can update their cached
1439 if (update_avg && !(parse->priv->duration_fmt == GST_FORMAT_TIME &&
1440 GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
1441 gst_element_post_message (GST_ELEMENT (parse),
1442 gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
1449 * gst_base_parse_add_index_entry:
1450 * @parse: #GstBaseParse.
1451 * @offset: offset of entry
1452 * @ts: timestamp associated with offset
1453 * @key: whether entry refers to keyframe
1454 * @force: add entry disregarding sanity checks
1456 * Adds an entry to the index associating @offset to @ts. It is recommended
1457 * to only add keyframe entries. @force allows to bypass checks, such as
1458 * whether the stream is (upstream) seekable, another entry is already "close"
1459 * to the new entry, etc.
1461 * Returns: #gboolean indicating whether entry was added
1466 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1467 GstClockTime ts, gboolean key, gboolean force)
1469 gboolean ret = FALSE;
1470 GstIndexAssociation associations[2];
1472 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1473 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1475 if (G_LIKELY (!force)) {
1477 if (!parse->priv->upstream_seekable) {
1478 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1482 /* FIXME need better helper data structure that handles these issues
1483 * related to ongoing collecting of index entries */
1484 if (parse->priv->index_last_offset >= (gint64) offset) {
1485 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1486 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1490 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1491 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1492 parse->priv->idx_interval) {
1493 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1494 GST_TIME_ARGS (parse->priv->index_last_ts));
1498 /* if last is not really the last one */
1499 if (!parse->priv->index_last_valid) {
1500 GstClockTime prev_ts;
1502 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1503 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1504 GST_DEBUG_OBJECT (parse,
1505 "entry too close to existing entry %" GST_TIME_FORMAT,
1506 GST_TIME_ARGS (prev_ts));
1507 parse->priv->index_last_offset = offset;
1508 parse->priv->index_last_ts = ts;
1514 associations[0].format = GST_FORMAT_TIME;
1515 associations[0].value = ts;
1516 associations[1].format = GST_FORMAT_BYTES;
1517 associations[1].value = offset;
1519 /* index might change on-the-fly, although that would be nutty app ... */
1520 GST_BASE_PARSE_INDEX_LOCK (parse);
1521 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1522 (key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_DELTA_UNIT,
1523 2, (const GstIndexAssociation *) &associations);
1524 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1527 parse->priv->index_last_offset = offset;
1528 parse->priv->index_last_ts = ts;
1537 /* check for seekable upstream, above and beyond a mere query */
1539 gst_base_parse_check_seekability (GstBaseParse * parse)
1542 gboolean seekable = FALSE;
1543 gint64 start = -1, stop = -1;
1544 guint idx_interval = 0;
1546 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1547 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1548 GST_DEBUG_OBJECT (parse, "seeking query failed");
1552 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1554 /* try harder to query upstream size if we didn't get it the first time */
1555 if (seekable && stop == -1) {
1556 GstFormat fmt = GST_FORMAT_BYTES;
1558 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1559 gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop);
1562 /* if upstream doesn't know the size, it's likely that it's not seekable in
1563 * practice even if it technically may be seekable */
1564 if (seekable && (start != 0 || stop <= start)) {
1565 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1569 /* let's not put every single frame into our index */
1571 if (stop < 10 * 1024 * 1024)
1573 else if (stop < 100 * 1024 * 1024)
1576 idx_interval = 1000;
1580 gst_query_unref (query);
1582 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1583 G_GUINT64_FORMAT ")", seekable, start, stop);
1584 parse->priv->upstream_seekable = seekable;
1585 parse->priv->upstream_size = seekable ? stop : 0;
1587 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1588 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1591 /* some misc checks on upstream */
1593 gst_base_parse_check_upstream (GstBaseParse * parse)
1595 GstFormat fmt = GST_FORMAT_TIME;
1598 if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
1599 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1600 /* upstream has one, accept it also, and no further updates */
1601 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1602 parse->priv->upstream_has_duration = TRUE;
1605 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1606 parse->priv->upstream_has_duration);
1609 /* checks src caps to determine if dealing with audio or video */
1610 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1612 gst_base_parse_check_media (GstBaseParse * parse)
1617 caps = GST_PAD_CAPS (parse->srcpad);
1618 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1619 parse->priv->is_video =
1620 g_str_has_prefix (gst_structure_get_name (s), "video");
1622 /* historical default */
1623 parse->priv->is_video = FALSE;
1626 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1629 /* takes ownership of frame */
1631 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1633 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1634 /* frame allocated on the heap, we can just take ownership */
1635 g_queue_push_tail (&parse->priv->queued_frames, frame);
1636 GST_TRACE ("queued frame %p", frame);
1638 GstBaseParseFrame *copy;
1640 /* probably allocated on the stack, must make a proper copy */
1641 copy = gst_base_parse_frame_copy (frame);
1642 g_queue_push_tail (&parse->priv->queued_frames, copy);
1643 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1644 gst_base_parse_frame_free (frame);
1648 /* gst_base_parse_handle_and_push_buffer:
1649 * @parse: #GstBaseParse.
1650 * @klass: #GstBaseParseClass.
1651 * @frame: (transfer full): a #GstBaseParseFrame
1653 * Parses the frame from given buffer and pushes it forward. Also performs
1654 * timestamp handling and checks the segment limits.
1656 * This is called with srcpad STREAM_LOCK held.
1658 * Returns: #GstFlowReturn
1660 static GstFlowReturn
1661 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1662 GstBaseParseClass * klass, GstBaseParseFrame * frame)
1668 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1670 buffer = frame->buffer;
1672 if (parse->priv->discont) {
1673 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1674 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1675 parse->priv->discont = FALSE;
1678 /* some one-time start-up */
1679 if (G_UNLIKELY (!parse->priv->framecount)) {
1680 gst_base_parse_check_seekability (parse);
1681 gst_base_parse_check_upstream (parse);
1684 GST_LOG_OBJECT (parse,
1685 "parsing frame at offset %" G_GUINT64_FORMAT
1686 " (%#" G_GINT64_MODIFIER "x) of size %d",
1687 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1688 GST_BUFFER_SIZE (buffer));
1690 /* use default handler to provide initial (upstream) metadata */
1691 gst_base_parse_parse_frame (parse, frame);
1693 /* store offset as it might get overwritten */
1694 offset = GST_BUFFER_OFFSET (buffer);
1695 ret = klass->parse_frame (parse, frame);
1697 buffer = frame->buffer;
1698 /* subclass must play nice */
1699 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1701 /* check if subclass/format can provide ts.
1702 * If so, that allows and enables extra seek and duration determining options */
1703 if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
1704 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1705 && parse->priv->pad_mode == GST_ACTIVATE_PULL) {
1706 parse->priv->first_frame_offset = offset;
1707 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1708 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1709 " for first frame at offset %" G_GINT64_FORMAT,
1710 GST_TIME_ARGS (parse->priv->first_frame_ts),
1711 parse->priv->first_frame_offset);
1712 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1714 GstClockTime last_ts = G_MAXINT64;
1716 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1717 gst_base_parse_locate_time (parse, &last_ts, &off);
1718 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1719 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1722 /* disable further checks */
1723 parse->priv->first_frame_offset = 0;
1727 /* again use default handler to add missing metadata;
1728 * we may have new information on frame properties */
1729 gst_base_parse_parse_frame (parse, frame);
1730 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1731 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1732 parse->priv->next_ts =
1733 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1735 /* we lost track, do not produce bogus time next time around
1736 * (probably means parser subclass has given up on parsing as well) */
1737 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1738 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1741 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1742 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1743 gst_base_parse_add_index_entry (parse, offset,
1744 GST_BUFFER_TIMESTAMP (buffer),
1745 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1747 /* First buffers are dropped, this means that the subclass needs more
1748 * frames to decide on the format and queues them internally */
1749 /* convert internal flow to OK and mark discont for the next buffer. */
1750 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1751 gst_base_parse_frame_free (frame);
1753 } else if (ret == GST_BASE_PARSE_FLOW_QUEUED) {
1754 gst_base_parse_queue_frame (parse, frame);
1756 } else if (ret != GST_FLOW_OK) {
1760 /* All OK, push queued frames if there are any */
1761 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1762 GstBaseParseFrame *queued_frame;
1764 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1765 queued_frame->buffer =
1766 gst_buffer_make_metadata_writable (queued_frame->buffer);
1767 gst_buffer_set_caps (queued_frame->buffer,
1768 GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (parse)));
1769 gst_base_parse_push_frame (parse, queued_frame);
1773 return gst_base_parse_push_frame (parse, frame);
1777 * gst_base_parse_push_frame:
1778 * @parse: #GstBaseParse.
1779 * @frame: (transfer full): a #GstBaseParseFrame
1781 * Pushes the frame downstream, sends any pending events and
1782 * does some timestamp and segment handling. Takes ownership
1783 * of @frame and will clear it (if it was initialised with
1784 * gst_base_parse_frame_init()) or free it.
1786 * This must be called with sinkpad STREAM_LOCK held.
1788 * Returns: #GstFlowReturn
1793 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1795 GstFlowReturn ret = GST_FLOW_OK;
1796 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1797 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1798 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1801 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1802 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1804 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1806 buffer = frame->buffer;
1808 GST_LOG_OBJECT (parse,
1809 "processing buffer of size %d with ts %" GST_TIME_FORMAT
1810 ", duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buffer),
1811 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1812 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1815 parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
1816 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1817 parse->priv->framecount++;
1818 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1819 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1822 /* 0 means disabled */
1823 if (parse->priv->update_interval < 0)
1824 parse->priv->update_interval = 50;
1825 else if (parse->priv->update_interval > 0 &&
1826 (parse->priv->framecount % parse->priv->update_interval) == 0)
1827 gst_base_parse_update_duration (parse);
1829 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1830 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1831 if (last_start != GST_CLOCK_TIME_NONE
1832 && GST_BUFFER_DURATION_IS_VALID (buffer))
1833 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1835 /* should have caps by now */
1836 g_return_val_if_fail (GST_PAD_CAPS (parse->srcpad), GST_FLOW_ERROR);
1838 /* segment adjustment magic; only if we are running the whole show */
1839 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
1840 (parse->priv->pad_mode == GST_ACTIVATE_PULL ||
1841 parse->priv->upstream_seekable)) {
1842 /* segment times are typically estimates,
1843 * actual frame data might lead subclass to different timestamps,
1844 * so override segment start from what is supplied there */
1845 if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
1846 && GST_CLOCK_TIME_IS_VALID (last_start))) {
1847 gst_event_unref (parse->priv->pending_segment);
1848 parse->segment.start =
1849 MIN ((guint64) last_start, (guint64) parse->segment.stop);
1850 GST_DEBUG_OBJECT (parse,
1851 "adjusting pending segment start to %" GST_TIME_FORMAT,
1852 GST_TIME_ARGS (parse->segment.start));
1853 parse->priv->pending_segment =
1854 gst_event_new_new_segment (FALSE, parse->segment.rate,
1855 parse->segment.format, parse->segment.start,
1856 parse->segment.stop, parse->segment.start);
1858 /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
1859 if (GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop) &&
1860 GST_CLOCK_TIME_IS_VALID (last_start)) {
1861 GstClockTimeDiff diff;
1863 /* only send newsegments with increasing start times,
1864 * otherwise if these go back and forth downstream (sinks) increase
1865 * accumulated time and running_time */
1866 diff = GST_CLOCK_DIFF (parse->segment.last_stop, last_start);
1867 if (G_UNLIKELY (diff > 2 * GST_SECOND
1868 && last_start > parse->segment.start
1869 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
1870 || last_start < parse->segment.stop))) {
1871 GST_DEBUG_OBJECT (parse,
1872 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
1873 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
1874 "Sending updated NEWSEGMENT events", diff,
1875 GST_TIME_ARGS (parse->segment.last_stop),
1876 GST_TIME_ARGS (last_start));
1877 if (G_UNLIKELY (parse->priv->pending_segment)) {
1878 gst_event_unref (parse->priv->pending_segment);
1879 parse->segment.start = last_start;
1880 parse->priv->pending_segment =
1881 gst_event_new_new_segment (FALSE, parse->segment.rate,
1882 parse->segment.format, parse->segment.start,
1883 parse->segment.stop, parse->segment.start);
1885 /* send newsegment events such that the gap is not accounted in
1886 * accum time, hence running_time */
1887 /* close ahead of gap */
1888 gst_pad_push_event (parse->srcpad,
1889 gst_event_new_new_segment (TRUE, parse->segment.rate,
1890 parse->segment.format, parse->segment.last_stop,
1891 parse->segment.last_stop, parse->segment.last_stop));
1893 gst_pad_push_event (parse->srcpad,
1894 gst_event_new_new_segment (FALSE, parse->segment.rate,
1895 parse->segment.format, last_start,
1896 parse->segment.stop, last_start));
1898 /* align segment view with downstream,
1899 * prevents double-counting accum when closing segment */
1900 gst_segment_set_newsegment (&parse->segment, FALSE,
1901 parse->segment.rate, parse->segment.format, last_start,
1902 parse->segment.stop, last_start);
1903 parse->segment.last_stop = last_start;
1908 /* and should then also be linked downstream, so safe to send some events */
1909 if (G_UNLIKELY (parse->priv->close_segment)) {
1910 /* only set up by loop */
1911 GST_DEBUG_OBJECT (parse, "loop sending close segment");
1912 gst_pad_push_event (parse->srcpad, parse->priv->close_segment);
1913 parse->priv->close_segment = NULL;
1915 if (G_UNLIKELY (parse->priv->pending_segment)) {
1916 GstEvent *pending_segment;
1918 pending_segment = parse->priv->pending_segment;
1919 parse->priv->pending_segment = NULL;
1921 GST_DEBUG_OBJECT (parse, "%s push pending segment",
1922 parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
1923 gst_pad_push_event (parse->srcpad, pending_segment);
1925 /* have caps; check identity */
1926 gst_base_parse_check_media (parse);
1929 /* update bitrates and optionally post corresponding tags
1930 * (following newsegment) */
1931 gst_base_parse_update_bitrates (parse, frame);
1933 if (G_UNLIKELY (parse->priv->pending_events)) {
1936 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1937 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1939 g_list_free (parse->priv->pending_events);
1940 parse->priv->pending_events = NULL;
1943 if (klass->pre_push_frame) {
1944 ret = klass->pre_push_frame (parse, frame);
1946 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
1949 /* take final ownership of frame buffer */
1950 buffer = frame->buffer;
1951 frame->buffer = NULL;
1953 /* subclass must play nice */
1954 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1957 buffer = gst_buffer_make_metadata_writable (buffer);
1958 gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
1960 parse->priv->seen_keyframe |= parse->priv->is_video &&
1961 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
1963 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
1964 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1965 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
1966 GST_BUFFER_TIMESTAMP (buffer) >
1967 parse->segment.stop + parse->priv->lead_out_ts) {
1968 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
1969 ret = GST_FLOW_UNEXPECTED;
1970 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1971 GST_BUFFER_DURATION_IS_VALID (buffer) &&
1972 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
1973 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
1974 parse->priv->lead_in_ts < parse->segment.start) {
1975 if (parse->priv->seen_keyframe) {
1976 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
1979 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
1980 ret = GST_BASE_PARSE_FLOW_DROPPED;
1987 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1988 GST_LOG_OBJECT (parse, "frame (%d bytes) dropped",
1989 GST_BUFFER_SIZE (buffer));
1990 gst_buffer_unref (buffer);
1992 } else if (ret == GST_FLOW_OK) {
1993 if (parse->segment.rate > 0.0) {
1994 GST_LOG_OBJECT (parse, "pushing frame (%d bytes) now..",
1995 GST_BUFFER_SIZE (buffer));
1996 ret = gst_pad_push (parse->srcpad, buffer);
1997 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
1999 GST_LOG_OBJECT (parse, "frame (%d bytes) queued for now",
2000 GST_BUFFER_SIZE (buffer));
2001 parse->priv->buffers_queued =
2002 g_slist_prepend (parse->priv->buffers_queued, buffer);
2006 GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
2007 GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
2008 gst_buffer_unref (buffer);
2009 /* if we are not sufficiently in control, let upstream decide on EOS */
2010 if (ret == GST_FLOW_UNEXPECTED &&
2011 (parse->priv->passthrough ||
2012 (parse->priv->pad_mode == GST_ACTIVATE_PUSH &&
2013 !parse->priv->upstream_seekable)))
2017 /* Update current running segment position */
2018 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2019 parse->segment.last_stop < last_stop)
2020 gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
2022 gst_base_parse_frame_free (frame);
2028 /* gst_base_parse_drain:
2030 * Drains the adapter until it is empty. It decreases the min_frame_size to
2031 * match the current adapter size and calls chain method until the adapter
2032 * is emptied or chain returns with error.
2035 gst_base_parse_drain (GstBaseParse * parse)
2039 GST_DEBUG_OBJECT (parse, "draining");
2040 parse->priv->drain = TRUE;
2043 avail = gst_adapter_available (parse->priv->adapter);
2047 if (gst_base_parse_chain (parse->sinkpad, NULL) != GST_FLOW_OK) {
2051 /* nothing changed, maybe due to truncated frame; break infinite loop */
2052 if (avail == gst_adapter_available (parse->priv->adapter)) {
2053 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2054 gst_adapter_clear (parse->priv->adapter);
2058 parse->priv->drain = FALSE;
2061 /* gst_base_parse_send_buffers
2063 * Sends buffers collected in send_buffers downstream, and ensures that list
2064 * is empty at the end (errors or not).
2066 static GstFlowReturn
2067 gst_base_parse_send_buffers (GstBaseParse * parse)
2069 GSList *send = NULL;
2071 GstFlowReturn ret = GST_FLOW_OK;
2073 send = parse->priv->buffers_send;
2077 buf = GST_BUFFER_CAST (send->data);
2078 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
2079 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2080 ", offset %" G_GINT64_FORMAT, buf,
2081 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2082 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2084 /* iterate output queue an push downstream */
2085 ret = gst_pad_push (parse->srcpad, buf);
2086 send = g_slist_delete_link (send, send);
2088 /* clear any leftover if error */
2089 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2091 buf = GST_BUFFER_CAST (send->data);
2092 gst_buffer_unref (buf);
2093 send = g_slist_delete_link (send, send);
2098 parse->priv->buffers_send = send;
2103 /* gst_base_parse_process_fragment:
2105 * Processes a reverse playback (forward) fragment:
2106 * - append head of last fragment that was skipped to current fragment data
2107 * - drain the resulting current fragment data (i.e. repeated chain)
2108 * - add time/duration (if needed) to frames queued by chain
2109 * - push queued data
2111 static GstFlowReturn
2112 gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
2115 GstFlowReturn ret = GST_FLOW_OK;
2116 gboolean seen_key = FALSE, seen_delta = FALSE;
2122 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2123 while (parse->priv->buffers_pending) {
2124 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2125 GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
2126 GST_BUFFER_SIZE (buf));
2127 gst_adapter_push (parse->priv->adapter, buf);
2128 parse->priv->buffers_pending =
2129 g_slist_delete_link (parse->priv->buffers_pending,
2130 parse->priv->buffers_pending);
2133 /* invalidate so no fall-back timestamping is performed;
2134 * ok if taken from subclass or upstream */
2135 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2136 /* prevent it hanging around stop all the time */
2137 parse->segment.last_stop = GST_CLOCK_TIME_NONE;
2139 parse->priv->discont = TRUE;
2141 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2142 /* initial skipped data is added to buffers_pending */
2143 gst_base_parse_drain (parse);
2146 if (parse->priv->buffers_send) {
2147 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2148 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2151 /* add metadata (if needed to queued buffers */
2152 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2153 GST_TIME_ARGS (parse->priv->last_ts));
2154 while (parse->priv->buffers_queued) {
2155 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2157 /* no touching if upstream or parsing provided time */
2158 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2159 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2160 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2161 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2162 GST_BUFFER_DURATION_IS_VALID (buf)) {
2163 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2164 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2166 parse->priv->last_ts = 0;
2167 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2168 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2169 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2171 /* no idea, very bad */
2172 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2175 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2177 /* reverse order for ascending sending */
2178 /* send downstream at keyframe not preceded by a keyframe
2179 * (e.g. that should identify start of collection of IDR nals) */
2180 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2182 ret = gst_base_parse_send_buffers (parse);
2183 /* if a problem, throw all to sending */
2184 if (ret != GST_FLOW_OK) {
2185 parse->priv->buffers_send =
2186 g_slist_reverse (parse->priv->buffers_queued);
2187 parse->priv->buffers_queued = NULL;
2196 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2198 parse->priv->buffers_send =
2199 g_slist_prepend (parse->priv->buffers_send, buf);
2200 parse->priv->buffers_queued =
2201 g_slist_delete_link (parse->priv->buffers_queued,
2202 parse->priv->buffers_queued);
2205 /* audio may have all marked as keyframe, so arrange to send here */
2207 ret = gst_base_parse_send_buffers (parse);
2209 /* any trailing unused no longer usable (ideally none) */
2210 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2211 GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
2212 gst_adapter_available (parse->priv->adapter));
2213 gst_adapter_clear (parse->priv->adapter);
2219 /* small helper that checks whether we have been trying to resync too long */
2220 static inline GstFlowReturn
2221 gst_base_parse_check_sync (GstBaseParse * parse)
2223 if (G_UNLIKELY (parse->priv->discont &&
2224 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2225 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2226 ("Failed to parse stream"), (NULL));
2227 return GST_FLOW_ERROR;
2233 static GstFlowReturn
2234 gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
2236 GstBaseParseClass *bclass;
2237 GstBaseParse *parse;
2238 GstFlowReturn ret = GST_FLOW_OK;
2239 GstBuffer *outbuf = NULL;
2240 GstBuffer *tmpbuf = NULL;
2244 guint old_min_size = 0, min_size, av;
2245 GstClockTime timestamp;
2246 GstBaseParseFrame *frame;
2248 parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
2249 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2251 if (parse->priv->detecting) {
2252 GstBuffer *detect_buf;
2254 if (parse->priv->detect_buffers_size == 0) {
2255 detect_buf = gst_buffer_ref (buffer);
2261 gst_buffer_new_and_alloc (parse->priv->detect_buffers_size +
2262 (buffer ? GST_BUFFER_SIZE (buffer) : 0));
2263 for (l = parse->priv->detect_buffers; l; l = l->next) {
2264 memcpy (GST_BUFFER_DATA (detect_buf) + offset,
2265 GST_BUFFER_DATA (l->data), GST_BUFFER_SIZE (l->data));
2266 offset += GST_BUFFER_SIZE (l->data);
2269 memcpy (GST_BUFFER_DATA (detect_buf) + offset, GST_BUFFER_DATA (buffer),
2270 GST_BUFFER_SIZE (buffer));
2273 ret = bclass->detect (parse, detect_buf);
2274 gst_buffer_unref (detect_buf);
2276 if (ret == GST_FLOW_OK) {
2279 /* Detected something */
2280 parse->priv->detecting = FALSE;
2282 for (l = parse->priv->detect_buffers; l; l = l->next) {
2283 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2285 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2286 GST_BUFFER_CAST (l->data));
2288 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2290 g_list_free (parse->priv->detect_buffers);
2291 parse->priv->detect_buffers = NULL;
2292 parse->priv->detect_buffers_size = 0;
2294 if (ret != GST_FLOW_OK) {
2298 /* Handle the current buffer */
2299 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2300 /* Still detecting, append buffer or error out if draining */
2302 if (parse->priv->drain) {
2303 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2304 return GST_FLOW_ERROR;
2305 } else if (parse->priv->flushing) {
2306 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2308 g_list_free (parse->priv->detect_buffers);
2309 parse->priv->detect_buffers = NULL;
2310 parse->priv->detect_buffers_size = 0;
2312 parse->priv->detect_buffers =
2313 g_list_append (parse->priv->detect_buffers, buffer);
2314 parse->priv->detect_buffers_size += GST_BUFFER_SIZE (buffer);
2318 /* Something went wrong, subclass responsible for error reporting */
2322 /* And now handle the current buffer if detection worked */
2325 frame = &parse->priv->frame;
2327 if (G_LIKELY (buffer)) {
2328 GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
2329 GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
2330 if (G_UNLIKELY (parse->priv->passthrough)) {
2331 gst_base_parse_frame_init (frame);
2332 frame->buffer = gst_buffer_make_metadata_writable (buffer);
2333 return gst_base_parse_push_frame (parse, frame);
2335 /* upstream feeding us in reverse playback;
2336 * gather each fragment, then process it in single run */
2337 if (parse->segment.rate < 0.0) {
2338 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2339 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2340 ret = gst_base_parse_process_fragment (parse, FALSE);
2342 gst_adapter_push (parse->priv->adapter, buffer);
2345 gst_adapter_push (parse->priv->adapter, buffer);
2348 if (G_UNLIKELY (buffer &&
2349 GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2350 frame->_private_flags |= GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
2351 gst_base_parse_frame_free (frame);
2354 /* Parse and push as many frames as possible */
2355 /* Stop either when adapter is empty or we are flushing */
2356 while (!parse->priv->flushing) {
2359 /* maintain frame state for a single frame parsing round across _chain calls,
2360 * so only init when needed */
2361 if (!frame->_private_flags)
2362 gst_base_parse_frame_init (frame);
2364 tmpbuf = gst_buffer_new ();
2367 /* Synchronization loop */
2369 /* note: if subclass indicates MAX fsize,
2370 * this will not likely be available anyway ... */
2371 min_size = MAX (parse->priv->min_frame_size, fsize);
2372 av = gst_adapter_available (parse->priv->adapter);
2374 /* loop safety check */
2375 if (G_UNLIKELY (old_min_size >= min_size))
2377 old_min_size = min_size;
2379 if (G_UNLIKELY (parse->priv->drain)) {
2381 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2382 if (G_UNLIKELY (!min_size)) {
2383 gst_buffer_unref (tmpbuf);
2388 /* Collect at least min_frame_size bytes */
2389 if (av < min_size) {
2390 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
2392 gst_buffer_unref (tmpbuf);
2396 /* always pass all available data */
2397 data = gst_adapter_peek (parse->priv->adapter, av);
2398 GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
2399 GST_BUFFER_SIZE (tmpbuf) = av;
2400 GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
2401 GST_BUFFER_FLAG_SET (tmpbuf, GST_MINI_OBJECT_FLAG_READONLY);
2403 if (parse->priv->discont) {
2404 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2405 GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
2409 gst_base_parse_frame_update (parse, frame, tmpbuf);
2410 res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
2411 gst_buffer_replace (&frame->buffer, NULL);
2413 if (gst_adapter_available (parse->priv->adapter) < fsize) {
2414 GST_DEBUG_OBJECT (parse,
2415 "found valid frame but not enough data available (only %d bytes)",
2416 gst_adapter_available (parse->priv->adapter));
2417 gst_buffer_unref (tmpbuf);
2420 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2424 /* subclass didn't touch this value. By default we skip 1 byte */
2428 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2429 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2430 /* reverse playback, and no frames found yet, so we are skipping
2431 * the leading part of a fragment, which may form the tail of
2432 * fragment coming later, hopefully subclass skips efficiently ... */
2433 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2434 outbuf = gst_adapter_take_buffer (parse->priv->adapter, skip);
2435 outbuf = gst_buffer_make_metadata_writable (outbuf);
2436 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
2437 parse->priv->buffers_pending =
2438 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2441 gst_adapter_flush (parse->priv->adapter, skip);
2443 parse->priv->offset += skip;
2444 if (!parse->priv->discont)
2445 parse->priv->sync_offset = parse->priv->offset;
2446 parse->priv->discont = TRUE;
2447 /* something changed least; nullify loop check */
2450 /* skip == 0 should imply subclass set min_size to need more data;
2451 * we check this shortly */
2452 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2453 gst_buffer_unref (tmpbuf);
2457 gst_buffer_unref (tmpbuf);
2461 /* Subclass found the sync, but still wants to skip some data */
2462 GST_LOG_OBJECT (parse, "skipping %d bytes", skip);
2463 gst_adapter_flush (parse->priv->adapter, skip);
2464 parse->priv->offset += skip;
2467 /* Grab lock to prevent a race with FLUSH_START handler */
2468 GST_PAD_STREAM_LOCK (parse->srcpad);
2470 /* FLUSH_START event causes the "flushing" flag to be set. In this
2471 * case we can leave the frame pushing loop */
2472 if (parse->priv->flushing) {
2473 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2477 /* move along with upstream timestamp (if any),
2478 * but interpolate in between */
2479 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2480 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2481 (parse->priv->prev_ts != timestamp)) {
2482 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2485 /* FIXME: Would it be more efficient to make a subbuffer instead? */
2486 outbuf = gst_adapter_take_buffer (parse->priv->adapter, fsize);
2487 outbuf = gst_buffer_make_metadata_writable (outbuf);
2489 /* Subclass may want to know the data offset */
2490 GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
2491 parse->priv->offset += fsize;
2492 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2493 GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
2495 frame->buffer = outbuf;
2496 ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
2497 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2499 if (ret != GST_FLOW_OK) {
2500 GST_LOG_OBJECT (parse, "push returned %d", ret);
2506 GST_LOG_OBJECT (parse, "chain leaving");
2512 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2513 ("min_size evolution %d -> %d; breaking to avoid looping",
2514 old_min_size, min_size));
2515 return GST_FLOW_ERROR;
2519 /* pull @size bytes at current offset,
2520 * i.e. at least try to and possibly return a shorter buffer if near the end */
2521 static GstFlowReturn
2522 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2523 GstBuffer ** buffer)
2525 GstFlowReturn ret = GST_FLOW_OK;
2527 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2529 /* Caching here actually makes much less difference than one would expect.
2530 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2531 if (parse->priv->cache) {
2532 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2533 gint cache_size = GST_BUFFER_SIZE (parse->priv->cache);
2535 if (cache_offset <= parse->priv->offset &&
2536 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2537 *buffer = gst_buffer_create_sub (parse->priv->cache,
2538 parse->priv->offset - cache_offset, size);
2539 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2542 /* not enough data in the cache, free cache and get a new one */
2543 gst_buffer_unref (parse->priv->cache);
2544 parse->priv->cache = NULL;
2547 /* refill the cache */
2549 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2550 64 * 1024), &parse->priv->cache);
2551 if (ret != GST_FLOW_OK) {
2552 parse->priv->cache = NULL;
2556 if (GST_BUFFER_SIZE (parse->priv->cache) >= size) {
2557 *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
2558 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2562 /* Not possible to get enough data, try a last time with
2563 * requesting exactly the size we need */
2564 gst_buffer_unref (parse->priv->cache);
2565 parse->priv->cache = NULL;
2567 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2568 &parse->priv->cache);
2570 if (ret != GST_FLOW_OK) {
2571 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2576 if (GST_BUFFER_SIZE (parse->priv->cache) < size) {
2577 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2578 G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", parse->priv->offset,
2579 size, GST_BUFFER_SIZE (parse->priv->cache));
2581 *buffer = parse->priv->cache;
2582 parse->priv->cache = NULL;
2587 *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
2588 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2593 static GstFlowReturn
2594 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2597 GstClockTime ts = 0;
2601 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2602 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2603 parse->priv->last_offset);
2605 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2606 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2607 GST_TIME_ARGS (parse->segment.start));
2608 ret = GST_FLOW_UNEXPECTED;
2612 /* last fragment started at last_offset / last_ts;
2613 * seek back 10s capped at 1MB */
2614 if (parse->priv->last_ts >= 10 * GST_SECOND)
2615 ts = parse->priv->last_ts - 10 * GST_SECOND;
2616 /* if we are exact now, we will be more so going backwards */
2617 if (parse->priv->exact_position) {
2618 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2620 GstFormat dstformat = GST_FORMAT_BYTES;
2622 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2623 &dstformat, &offset)) {
2624 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2627 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2628 parse->priv->last_offset - 1024);
2629 offset = MAX (0, offset);
2631 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2633 parse->priv->offset = offset;
2635 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2637 if (ret != GST_FLOW_OK)
2640 /* offset will increase again as fragment is processed/parsed */
2641 parse->priv->last_offset = offset;
2643 gst_adapter_push (parse->priv->adapter, buffer);
2644 ret = gst_base_parse_process_fragment (parse, FALSE);
2645 if (ret != GST_FLOW_OK)
2648 /* force previous fragment */
2649 parse->priv->offset = -1;
2656 * pull and scan for next frame starting from current offset
2657 * ajusts sync, drain and offset going along */
2658 static GstFlowReturn
2659 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2660 GstBaseParseFrame * frame, gboolean full)
2662 GstBuffer *buffer, *outbuf;
2663 GstFlowReturn ret = GST_FLOW_OK;
2664 guint fsize = 1, min_size, old_min_size = 0;
2667 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2669 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2670 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2672 /* let's make this efficient for all subclass once and for all;
2673 * maybe it does not need this much, but in the latter case, we know we are
2674 * in pull mode here and might as well try to read and supply more anyway
2675 * (so does the buffer caching mechanism) */
2681 min_size = MAX (parse->priv->min_frame_size, fsize);
2682 /* loop safety check */
2683 if (G_UNLIKELY (old_min_size >= min_size))
2685 old_min_size = min_size;
2687 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2688 if (ret != GST_FLOW_OK)
2691 if (parse->priv->discont) {
2692 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2693 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
2696 /* if we got a short read, inform subclass we are draining leftover
2697 * and no more is to be expected */
2698 if (GST_BUFFER_SIZE (buffer) < min_size)
2699 parse->priv->drain = TRUE;
2701 if (parse->priv->detecting) {
2702 ret = klass->detect (parse, buffer);
2703 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2704 /* If draining we error out, otherwise request a buffer
2706 if (parse->priv->drain) {
2707 gst_buffer_unref (buffer);
2708 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2709 return GST_FLOW_ERROR;
2712 gst_buffer_unref (buffer);
2715 } else if (ret != GST_FLOW_OK) {
2716 gst_buffer_unref (buffer);
2717 GST_ERROR_OBJECT (parse, "detect() returned %s",
2718 gst_flow_get_name (ret));
2722 /* Else handle this buffer normally */
2726 gst_base_parse_frame_update (parse, frame, buffer);
2727 res = klass->check_valid_frame (parse, frame, &fsize, &skip);
2728 gst_buffer_replace (&frame->buffer, NULL);
2730 parse->priv->drain = FALSE;
2731 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2734 parse->priv->drain = FALSE;
2738 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2739 if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2740 /* reverse playback, and no frames found yet, so we are skipping
2741 * the leading part of a fragment, which may form the tail of
2742 * fragment coming later, hopefully subclass skips efficiently ... */
2743 outbuf = gst_buffer_create_sub (buffer, 0, skip);
2744 parse->priv->buffers_pending =
2745 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2748 parse->priv->offset += skip;
2749 if (!parse->priv->discont)
2750 parse->priv->sync_offset = parse->priv->offset;
2751 parse->priv->discont = TRUE;
2752 /* something changed at least; nullify loop check */
2753 if (fsize == G_MAXUINT)
2754 fsize = old_min_size + 64 * 1024;
2757 /* skip == 0 should imply subclass set min_size to need more data;
2758 * we check this shortly */
2759 GST_DEBUG_OBJECT (parse, "finding sync...");
2760 gst_buffer_unref (buffer);
2761 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2766 /* Does the subclass want to skip too? */
2768 parse->priv->offset += skip;
2772 if (fsize + skip <= GST_BUFFER_SIZE (buffer)) {
2773 outbuf = gst_buffer_create_sub (buffer, skip, fsize);
2774 GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
2775 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2776 gst_buffer_unref (buffer);
2778 gst_buffer_unref (buffer);
2779 ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
2780 if (ret != GST_FLOW_OK)
2782 if (GST_BUFFER_SIZE (outbuf) < fsize) {
2783 gst_buffer_unref (outbuf);
2784 ret = GST_FLOW_UNEXPECTED;
2788 parse->priv->offset += fsize;
2790 frame->buffer = outbuf;
2798 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2799 ("min_size evolution %d -> %d; breaking to avoid looping",
2800 old_min_size, min_size));
2801 return GST_FLOW_ERROR;
2805 /* Loop that is used in pull mode to retrieve data from upstream */
2807 gst_base_parse_loop (GstPad * pad)
2809 GstBaseParse *parse;
2810 GstBaseParseClass *klass;
2811 GstFlowReturn ret = GST_FLOW_OK;
2812 GstBaseParseFrame frame;
2814 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2815 klass = GST_BASE_PARSE_GET_CLASS (parse);
2817 /* reverse playback:
2818 * first fragment (closest to stop time) is handled normally below,
2819 * then we pull in fragments going backwards */
2820 if (parse->segment.rate < 0.0) {
2821 /* check if we jumped back to a previous fragment,
2822 * which is a post-first fragment */
2823 if (parse->priv->offset < 0) {
2824 ret = gst_base_parse_handle_previous_fragment (parse);
2829 gst_base_parse_frame_init (&frame);
2830 ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
2831 if (ret != GST_FLOW_OK)
2834 /* This always cleans up frame, even if error occurs */
2835 ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
2837 /* eat expected eos signalling past segment in reverse playback */
2838 if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
2839 parse->segment.last_stop >= parse->segment.stop) {
2840 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2841 /* push what was accumulated during loop run */
2842 gst_base_parse_process_fragment (parse, TRUE);
2843 /* force previous fragment */
2844 parse->priv->offset = -1;
2849 if (ret == GST_FLOW_UNEXPECTED)
2851 else if (ret != GST_FLOW_OK)
2854 gst_object_unref (parse);
2860 ret = GST_FLOW_UNEXPECTED;
2861 GST_DEBUG_OBJECT (parse, "eos");
2866 gboolean push_eos = FALSE;
2868 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2869 gst_flow_get_name (ret));
2870 gst_pad_pause_task (parse->sinkpad);
2872 if (ret == GST_FLOW_UNEXPECTED) {
2873 /* handle end-of-stream/segment */
2874 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2877 if ((stop = parse->segment.stop) == -1)
2878 stop = parse->segment.duration;
2880 GST_DEBUG_OBJECT (parse, "sending segment_done");
2882 gst_element_post_message
2883 (GST_ELEMENT_CAST (parse),
2884 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2885 GST_FORMAT_TIME, stop));
2887 /* If we STILL have zero frames processed, fire an error */
2888 if (parse->priv->framecount == 0) {
2889 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2890 ("No valid frames found before end of stream"), (NULL));
2894 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
2895 /* for fatal errors we post an error message, wrong-state is
2896 * not fatal because it happens due to flushes and only means
2897 * that we should stop now. */
2898 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2899 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2903 /* newsegment before eos */
2904 if (parse->priv->pending_segment) {
2905 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
2906 parse->priv->pending_segment = NULL;
2908 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
2910 gst_object_unref (parse);
2915 gst_base_parse_sink_activate (GstPad * sinkpad)
2917 GstBaseParse *parse;
2918 gboolean result = TRUE;
2920 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2922 GST_DEBUG_OBJECT (parse, "sink activate");
2924 if (gst_pad_check_pull_range (sinkpad)) {
2925 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
2926 result = gst_pad_activate_pull (sinkpad, TRUE);
2928 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
2929 result = gst_pad_activate_push (sinkpad, TRUE);
2932 GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
2933 gst_object_unref (parse);
2938 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
2940 GstBaseParseClass *klass;
2941 gboolean result = TRUE;
2943 GST_DEBUG_OBJECT (parse, "activate %d", active);
2945 klass = GST_BASE_PARSE_GET_CLASS (parse);
2948 if (parse->priv->pad_mode == GST_ACTIVATE_NONE && klass->start)
2949 result = klass->start (parse);
2951 /* If the subclass implements ::detect we want to
2952 * call it for the first buffers now */
2953 parse->priv->detecting = (klass->detect != NULL);
2955 /* We must make sure streaming has finished before resetting things
2956 * and calling the ::stop vfunc */
2957 GST_PAD_STREAM_LOCK (parse->sinkpad);
2958 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
2960 if (parse->priv->pad_mode != GST_ACTIVATE_NONE && klass->stop)
2961 result = klass->stop (parse);
2963 parse->priv->pad_mode = GST_ACTIVATE_NONE;
2965 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
2970 gst_base_parse_sink_activate_push (GstPad * pad, gboolean active)
2972 gboolean result = TRUE;
2973 GstBaseParse *parse;
2975 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2977 GST_DEBUG_OBJECT (parse, "sink activate push %d", active);
2979 result = gst_base_parse_activate (parse, active);
2982 parse->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
2984 GST_DEBUG_OBJECT (parse, "sink activate push return: %d", result);
2986 gst_object_unref (parse);
2991 gst_base_parse_sink_activate_pull (GstPad * sinkpad, gboolean active)
2993 gboolean result = FALSE;
2994 GstBaseParse *parse;
2996 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2998 GST_DEBUG_OBJECT (parse, "activate pull %d", active);
3000 result = gst_base_parse_activate (parse, active);
3004 parse->priv->pending_segment = gst_event_new_new_segment (FALSE,
3005 parse->segment.rate, parse->segment.format,
3006 parse->segment.start, parse->segment.stop, parse->segment.last_stop);
3008 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3011 result &= gst_pad_stop_task (sinkpad);
3016 parse->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
3018 GST_DEBUG_OBJECT (parse, "sink activate pull return: %d", result);
3020 gst_object_unref (parse);
3026 * gst_base_parse_set_duration:
3027 * @parse: #GstBaseParse.
3029 * @duration: duration value.
3030 * @interval: how often to update the duration estimate based on bitrate, or 0.
3032 * Sets the duration of the currently playing media. Subclass can use this
3033 * when it is able to determine duration and/or notices a change in the media
3034 * duration. Alternatively, if @interval is non-zero (default), then stream
3035 * duration is determined based on estimated bitrate, and updated every @interval
3041 gst_base_parse_set_duration (GstBaseParse * parse,
3042 GstFormat fmt, gint64 duration, gint interval)
3044 g_return_if_fail (parse != NULL);
3046 if (parse->priv->upstream_has_duration) {
3047 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3051 if (duration != parse->priv->duration) {
3054 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
3055 gst_element_post_message (GST_ELEMENT (parse), m);
3057 /* TODO: what about duration tag? */
3059 parse->priv->duration = duration;
3060 parse->priv->duration_fmt = fmt;
3061 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3062 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3063 if (interval != 0) {
3064 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3068 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3069 parse->priv->update_interval = interval;
3075 * gst_base_parse_set_average_bitrate:
3076 * @parse: #GstBaseParse.
3077 * @bitrate: average bitrate in bits/second
3079 * Optionally sets the average bitrate detected in media (if non-zero),
3080 * e.g. based on metadata, as it will be posted to the application.
3082 * By default, announced average bitrate is estimated. The average bitrate
3083 * is used to estimate the total duration of the stream and to estimate
3084 * a seek position, if there's no index and the format is syncable
3085 * (see gst_base_parse_set_syncable()).
3090 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3092 parse->priv->bitrate = bitrate;
3093 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3097 * gst_base_parse_set_min_frame_size:
3098 * @parse: #GstBaseParse.
3099 * @min_size: Minimum size of the data that this base class should give to
3102 * Subclass can use this function to tell the base class that it needs to
3103 * give at least #min_size buffers.
3108 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3110 g_return_if_fail (parse != NULL);
3112 parse->priv->min_frame_size = min_size;
3113 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3117 * gst_base_parse_set_frame_rate:
3118 * @parse: the #GstBaseParse to set
3119 * @fps_num: frames per second (numerator).
3120 * @fps_den: frames per second (denominator).
3121 * @lead_in: frames needed before a segment for subsequent decode
3122 * @lead_out: frames needed after a segment
3124 * If frames per second is configured, parser can take care of buffer duration
3125 * and timestamping. When performing segment clipping, or seeking to a specific
3126 * location, a corresponding decoder might need an initial @lead_in and a
3127 * following @lead_out number of frames to ensure the desired segment is
3128 * entirely filled upon decoding.
3133 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3134 guint fps_den, guint lead_in, guint lead_out)
3136 g_return_if_fail (parse != NULL);
3138 parse->priv->fps_num = fps_num;
3139 parse->priv->fps_den = fps_den;
3140 if (!fps_num || !fps_den) {
3141 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3143 fps_num = fps_den = 0;
3144 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3145 parse->priv->lead_in = parse->priv->lead_out = 0;
3146 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3148 parse->priv->frame_duration =
3149 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3150 parse->priv->lead_in = lead_in;
3151 parse->priv->lead_out = lead_out;
3152 parse->priv->lead_in_ts =
3153 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3154 parse->priv->lead_out_ts =
3155 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3156 /* aim for about 1.5s to estimate duration */
3157 if (parse->priv->update_interval < 0) {
3158 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3159 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3160 parse->priv->update_interval);
3163 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3164 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3165 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3166 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3167 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3168 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3172 * gst_base_parse_set_has_timing_info:
3173 * @parse: a #GstBaseParse
3174 * @has_timing: whether frames carry timing information
3176 * Set if frames carry timing information which the subclass can (generally)
3177 * parse and provide. In particular, intrinsic (rather than estimated) time
3178 * can be obtained following a seek.
3183 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3185 parse->priv->has_timing_info = has_timing;
3186 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3190 * gst_base_parse_set_syncable:
3191 * @parse: a #GstBaseParse
3192 * @syncable: set if frame starts can be identified
3194 * Set if frame starts can be identified. This is set by default and
3195 * determines whether seeking based on bitrate averages
3196 * is possible for a format/stream.
3201 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3203 parse->priv->syncable = syncable;
3204 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3208 * gst_base_parse_set_passthrough:
3209 * @parse: a #GstBaseParse
3210 * @passthrough: %TRUE if parser should run in passthrough mode
3212 * Set if the nature of the format or configuration does not allow (much)
3213 * parsing, and the parser should operate in passthrough mode (which only
3214 * applies when operating in push mode). That is, incoming buffers are
3215 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3216 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3217 * so subclass can perform as much or as little is appropriate for
3218 * passthrough semantics in @pre_push_frame.
3223 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3225 parse->priv->passthrough = passthrough;
3226 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3230 * gst_base_parse_set_latency:
3231 * @parse: a #GstBaseParse
3232 * @min_latency: minimum parse latency
3233 * @max_latency: maximum parse latency
3235 * Sets the minimum and maximum (which may likely be equal) latency introduced
3236 * by the parsing process. If there is such a latency, which depends on the
3237 * particular parsing of the format, it typically corresponds to 1 frame duration.
3242 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3243 GstClockTime max_latency)
3245 GST_OBJECT_LOCK (parse);
3246 parse->priv->min_latency = min_latency;
3247 parse->priv->max_latency = max_latency;
3248 GST_OBJECT_UNLOCK (parse);
3249 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3250 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3251 GST_TIME_ARGS (max_latency));
3255 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3256 GstClockTime * duration)
3258 gboolean res = FALSE;
3260 g_return_val_if_fail (duration != NULL, FALSE);
3262 *duration = GST_CLOCK_TIME_NONE;
3263 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3264 GST_LOG_OBJECT (parse, "using provided duration");
3265 *duration = parse->priv->duration;
3267 } else if (parse->priv->duration != -1) {
3268 GST_LOG_OBJECT (parse, "converting provided duration");
3269 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3270 parse->priv->duration, format, (gint64 *) duration);
3271 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3272 GST_LOG_OBJECT (parse, "using estimated duration");
3273 *duration = parse->priv->estimated_duration;
3277 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3278 GST_TIME_ARGS (*duration));
3282 static const GstQueryType *
3283 gst_base_parse_get_querytypes (GstPad * pad)
3285 static const GstQueryType list[] = {
3298 gst_base_parse_query (GstPad * pad, GstQuery * query)
3300 GstBaseParse *parse;
3301 gboolean res = FALSE;
3303 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
3305 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3307 switch (GST_QUERY_TYPE (query)) {
3308 case GST_QUERY_POSITION:
3313 GST_DEBUG_OBJECT (parse, "position query");
3314 gst_query_parse_position (query, &format, NULL);
3316 /* try upstream first */
3317 res = gst_pad_query_default (pad, query);
3319 /* Fall back on interpreting segment */
3320 GST_OBJECT_LOCK (parse);
3321 if (format == GST_FORMAT_BYTES) {
3322 dest_value = parse->priv->offset;
3324 } else if (format == parse->segment.format &&
3325 GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop)) {
3326 dest_value = gst_segment_to_stream_time (&parse->segment,
3327 parse->segment.format, parse->segment.last_stop);
3330 GST_OBJECT_UNLOCK (parse);
3332 /* no precise result, upstream no idea either, then best estimate */
3333 /* priv->offset is updated in both PUSH/PULL modes */
3334 res = gst_base_parse_convert (parse,
3335 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3338 gst_query_set_position (query, format, dest_value);
3342 case GST_QUERY_DURATION:
3345 GstClockTime duration;
3347 GST_DEBUG_OBJECT (parse, "duration query");
3348 gst_query_parse_duration (query, &format, NULL);
3350 /* consult upstream */
3351 res = gst_pad_query_default (pad, query);
3353 /* otherwise best estimate from us */
3355 res = gst_base_parse_get_duration (parse, format, &duration);
3357 gst_query_set_duration (query, format, duration);
3361 case GST_QUERY_SEEKING:
3364 GstClockTime duration = GST_CLOCK_TIME_NONE;
3365 gboolean seekable = FALSE;
3367 GST_DEBUG_OBJECT (parse, "seeking query");
3368 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3370 /* consult upstream */
3371 res = gst_pad_query_default (pad, query);
3373 /* we may be able to help if in TIME */
3374 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3375 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3376 /* already OK if upstream takes care */
3377 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3379 if (!(res && seekable)) {
3380 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3381 || duration == -1) {
3382 /* seekable if we still have a chance to get duration later on */
3384 parse->priv->upstream_seekable && parse->priv->update_interval;
3386 seekable = parse->priv->upstream_seekable;
3387 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3390 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3396 case GST_QUERY_FORMATS:
3397 gst_query_set_formatsv (query, 3, fmtlist);
3400 case GST_QUERY_CONVERT:
3402 GstFormat src_format, dest_format;
3403 gint64 src_value, dest_value;
3405 gst_query_parse_convert (query, &src_format, &src_value,
3406 &dest_format, &dest_value);
3408 res = gst_base_parse_convert (parse, src_format, src_value,
3409 dest_format, &dest_value);
3411 gst_query_set_convert (query, src_format, src_value,
3412 dest_format, dest_value);
3416 case GST_QUERY_LATENCY:
3418 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3420 GstClockTime min_latency, max_latency;
3422 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3423 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3424 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3425 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3427 GST_OBJECT_LOCK (parse);
3428 /* add our latency */
3429 if (min_latency != -1)
3430 min_latency += parse->priv->min_latency;
3431 if (max_latency != -1)
3432 max_latency += parse->priv->max_latency;
3433 GST_OBJECT_UNLOCK (parse);
3435 gst_query_set_latency (query, live, min_latency, max_latency);
3440 res = gst_pad_query_default (pad, query);
3446 /* scans for a cluster start from @pos,
3447 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3448 static GstFlowReturn
3449 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3450 GstClockTime * time, GstClockTime * duration)
3452 GstBaseParseClass *klass;
3454 gboolean orig_drain, orig_discont;
3455 GstFlowReturn ret = GST_FLOW_OK;
3456 GstBuffer *buf = NULL;
3457 GstBaseParseFrame frame;
3459 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3460 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3461 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3463 klass = GST_BASE_PARSE_GET_CLASS (parse);
3465 *time = GST_CLOCK_TIME_NONE;
3466 *duration = GST_CLOCK_TIME_NONE;
3469 orig_offset = parse->priv->offset;
3470 orig_discont = parse->priv->discont;
3471 orig_drain = parse->priv->drain;
3473 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3474 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3476 gst_base_parse_frame_init (&frame);
3478 /* jump elsewhere and locate next frame */
3479 parse->priv->offset = *pos;
3480 ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
3481 if (ret != GST_FLOW_OK)
3485 GST_LOG_OBJECT (parse,
3486 "peek parsing frame at offset %" G_GUINT64_FORMAT
3487 " (%#" G_GINT64_MODIFIER "x) of size %d",
3488 GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
3490 /* get offset first, subclass parsing might dump other stuff in there */
3491 *pos = GST_BUFFER_OFFSET (buf);
3492 ret = klass->parse_frame (parse, &frame);
3495 /* but it should provide proper time */
3496 *time = GST_BUFFER_TIMESTAMP (buf);
3497 *duration = GST_BUFFER_DURATION (buf);
3499 gst_base_parse_frame_free (&frame);
3501 GST_LOG_OBJECT (parse,
3502 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3503 GST_TIME_ARGS (*time), *pos);
3507 parse->priv->offset = orig_offset;
3508 parse->priv->discont = orig_discont;
3509 parse->priv->drain = orig_drain;
3514 /* bisect and scan through file for frame starting before @time,
3515 * returns OK and @time/@offset if found, NONE and/or error otherwise
3516 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3517 static GstFlowReturn
3518 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3521 GstFlowReturn ret = GST_FLOW_OK;
3522 gint64 lpos, hpos, newpos;
3523 GstClockTime time, ltime, htime, newtime, dur;
3524 gboolean cont = TRUE;
3525 const GstClockTime tolerance = TARGET_DIFFERENCE;
3526 const guint chunk = 4 * 1024;
3528 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3529 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3531 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3532 GST_TIME_ARGS (*_time));
3534 /* TODO also make keyframe aware if useful some day */
3549 /* do not know at first */
3551 *_time = GST_CLOCK_TIME_NONE;
3553 /* need initial positions; start and end */
3554 lpos = parse->priv->first_frame_offset;
3555 ltime = parse->priv->first_frame_ts;
3556 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3557 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3558 return GST_FLOW_ERROR;
3560 hpos = parse->priv->upstream_size;
3562 GST_DEBUG_OBJECT (parse,
3563 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3564 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3565 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3567 /* check preconditions are satisfied;
3568 * start and end are needed, except for special case where we scan for
3569 * last frame to determine duration */
3570 if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
3571 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3572 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3576 /* shortcut cases */
3579 } else if (time < ltime + tolerance) {
3583 } else if (time >= htime) {
3589 while (htime > ltime && cont) {
3590 GST_LOG_OBJECT (parse,
3591 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3592 GST_TIME_ARGS (ltime));
3593 GST_LOG_OBJECT (parse,
3594 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3595 GST_TIME_ARGS (htime));
3596 if (G_UNLIKELY (time == G_MAXINT64)) {
3598 } else if (G_LIKELY (hpos > lpos)) {
3600 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3603 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3605 /* we check this case once, but not forever, so break loop */
3610 newpos = CLAMP (newpos, lpos, hpos);
3611 GST_LOG_OBJECT (parse,
3612 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3613 GST_TIME_ARGS (time), newpos);
3615 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3616 if (ret == GST_FLOW_UNEXPECTED) {
3617 /* heuristic HACK */
3618 hpos = MAX (lpos, hpos - chunk);
3620 } else if (ret != GST_FLOW_OK) {
3624 if (newtime == -1 || newpos == -1) {
3625 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3629 if (G_UNLIKELY (time == G_MAXINT64)) {
3632 if (GST_CLOCK_TIME_IS_VALID (dur))
3635 } else if (newtime > time) {
3637 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3639 } else if (newtime + tolerance > time) {
3640 /* close enough undershoot */
3644 } else if (newtime < ltime) {
3645 /* so a position beyond lpos resulted in earlier time than ltime ... */
3646 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3649 /* undershoot too far */
3650 newpos += newpos == lpos ? chunk : 0;
3651 lpos = CLAMP (newpos, lpos, hpos);
3657 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3658 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3663 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3664 gboolean before, GstClockTime * _ts)
3666 gint64 bytes = 0, ts = 0;
3667 GstIndexEntry *entry = NULL;
3669 if (time == GST_CLOCK_TIME_NONE) {
3675 GST_BASE_PARSE_INDEX_LOCK (parse);
3676 if (parse->priv->index) {
3677 /* Let's check if we have an index entry for that time */
3678 entry = gst_index_get_assoc_entry (parse->priv->index,
3679 parse->priv->index_id,
3680 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3681 GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3685 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3686 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3688 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3689 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3690 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3692 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3693 GST_TIME_ARGS (time));
3696 ts = GST_CLOCK_TIME_NONE;
3699 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3708 /* returns TRUE if seek succeeded */
3710 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3715 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3716 gboolean flush, update, res = TRUE, accurate;
3717 gint64 cur, stop, seekpos, seekstop;
3718 GstSegment seeksegment = { 0, };
3719 GstFormat dstformat;
3720 GstClockTime start_ts;
3722 gst_event_parse_seek (event, &rate, &format, &flags,
3723 &cur_type, &cur, &stop_type, &stop);
3725 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3726 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3727 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3728 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3730 /* no negative rates in push mode */
3731 if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
3734 if (cur_type != GST_SEEK_TYPE_SET ||
3735 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3738 /* For any format other than TIME, see if upstream handles
3739 * it directly or fail. For TIME, try upstream, but do it ourselves if
3740 * it fails upstream */
3741 if (format != GST_FORMAT_TIME) {
3742 /* default action delegates to upstream */
3746 gst_event_ref (event);
3747 if ((res = gst_pad_push_event (parse->sinkpad, event))) {
3752 /* get flush flag */
3753 flush = flags & GST_SEEK_FLAG_FLUSH;
3755 /* copy segment, we need this because we still need the old
3756 * segment when we close the current segment. */
3757 memcpy (&seeksegment, &parse->segment, sizeof (GstSegment));
3759 GST_DEBUG_OBJECT (parse, "configuring seek");
3760 gst_segment_set_seek (&seeksegment, rate, format, flags,
3761 cur_type, cur, stop_type, stop, &update);
3763 /* accurate seeking implies seek tables are used to obtain position,
3764 * and the requested segment is maintained exactly, not adjusted any way */
3765 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3767 /* maybe we can be accurate for (almost) free */
3768 gst_base_parse_find_offset (parse, seeksegment.last_stop, TRUE, &start_ts);
3769 if (seeksegment.last_stop <= start_ts + TARGET_DIFFERENCE) {
3770 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3774 GstClockTime startpos = seeksegment.last_stop;
3776 /* accurate requested, so ... seek a bit before target */
3777 if (startpos < parse->priv->lead_in_ts)
3780 startpos -= parse->priv->lead_in_ts;
3781 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3782 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3785 start_ts = seeksegment.last_stop;
3786 dstformat = GST_FORMAT_BYTES;
3787 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
3788 &dstformat, &seekpos))
3789 goto convert_failed;
3790 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3791 &dstformat, &seekstop))
3792 goto convert_failed;
3795 GST_DEBUG_OBJECT (parse,
3796 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3798 GST_DEBUG_OBJECT (parse,
3799 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3800 seeksegment.stop, seekstop);
3802 if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
3805 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3808 if (parse->srcpad) {
3809 GST_DEBUG_OBJECT (parse, "sending flush start");
3810 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3811 /* unlock upstream pull_range */
3812 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3815 gst_pad_pause_task (parse->sinkpad);
3818 /* we should now be able to grab the streaming thread because we stopped it
3819 * with the above flush/pause code */
3820 GST_PAD_STREAM_LOCK (parse->sinkpad);
3822 /* save current position */
3823 last_stop = parse->segment.last_stop;
3824 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3827 /* now commit to new position */
3829 /* prepare for streaming again */
3831 GST_DEBUG_OBJECT (parse, "sending flush stop");
3832 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
3833 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
3834 gst_base_parse_clear_queues (parse);
3836 if (parse->priv->close_segment)
3837 gst_event_unref (parse->priv->close_segment);
3839 parse->priv->close_segment = gst_event_new_new_segment (TRUE,
3840 parse->segment.rate, parse->segment.format,
3841 parse->segment.accum, parse->segment.last_stop, parse->segment.accum);
3843 /* keep track of our last_stop */
3844 seeksegment.accum = parse->segment.last_stop;
3846 GST_DEBUG_OBJECT (parse, "Created close seg format %d, "
3847 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3848 ", pos = %" GST_TIME_FORMAT, format,
3849 GST_TIME_ARGS (parse->segment.accum),
3850 GST_TIME_ARGS (parse->segment.last_stop),
3851 GST_TIME_ARGS (parse->segment.accum));
3854 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3856 /* store the newsegment event so it can be sent from the streaming thread. */
3857 if (parse->priv->pending_segment)
3858 gst_event_unref (parse->priv->pending_segment);
3860 /* This will be sent later in _loop() */
3861 parse->priv->pending_segment =
3862 gst_event_new_new_segment (FALSE, parse->segment.rate,
3863 parse->segment.format, parse->segment.start,
3864 parse->segment.stop, parse->segment.start);
3866 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3867 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3868 ", pos = %" GST_TIME_FORMAT, format,
3869 GST_TIME_ARGS (parse->segment.start),
3870 GST_TIME_ARGS (parse->segment.stop),
3871 GST_TIME_ARGS (parse->segment.start));
3873 /* one last chance in pull mode to stay accurate;
3874 * maybe scan and subclass can find where to go */
3877 GstClockTime ts = seeksegment.last_stop;
3879 gst_base_parse_locate_time (parse, &ts, &scanpos);
3883 /* running collected index now consists of several intervals,
3884 * so optimized check no longer possible */
3885 parse->priv->index_last_valid = FALSE;
3886 parse->priv->index_last_offset = 0;
3887 parse->priv->index_last_ts = 0;
3891 /* mark discont if we are going to stream from another position. */
3892 if (seekpos != parse->priv->offset) {
3893 GST_DEBUG_OBJECT (parse,
3894 "mark DISCONT, we did a seek to another position");
3895 parse->priv->offset = seekpos;
3896 parse->priv->last_offset = seekpos;
3897 parse->priv->seen_keyframe = FALSE;
3898 parse->priv->discont = TRUE;
3899 parse->priv->next_ts = start_ts;
3900 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3901 parse->priv->sync_offset = seekpos;
3902 parse->priv->exact_position = accurate;
3905 /* Start streaming thread if paused */
3906 gst_pad_start_task (parse->sinkpad,
3907 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3909 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3914 GstEvent *new_event;
3915 GstBaseParseSeek *seek;
3916 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
3918 /* The only thing we need to do in PUSH-mode is to send the
3919 seek event (in bytes) to upstream. Segment / flush handling happens
3920 in corresponding src event handlers */
3921 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3922 if (seekstop >= 0 && seekpos <= seekpos)
3924 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
3925 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3927 /* store segment info so its precise details can be reconstructed when
3928 * receiving newsegment;
3929 * this matters for all details when accurate seeking,
3930 * is most useful to preserve NONE stop time otherwise */
3931 seek = g_new0 (GstBaseParseSeek, 1);
3932 seek->segment = seeksegment;
3933 seek->accurate = accurate;
3934 seek->offset = seekpos;
3935 seek->start_ts = start_ts;
3936 GST_OBJECT_LOCK (parse);
3937 /* less optimal, but preserves order */
3938 parse->priv->pending_seeks =
3939 g_slist_append (parse->priv->pending_seeks, seek);
3940 GST_OBJECT_UNLOCK (parse);
3942 res = gst_pad_push_event (parse->sinkpad, new_event);
3945 GST_OBJECT_LOCK (parse);
3946 parse->priv->pending_seeks =
3947 g_slist_remove (parse->priv->pending_seeks, seek);
3948 GST_OBJECT_UNLOCK (parse);
3954 /* handled event is ours to free */
3956 gst_event_unref (event);
3962 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
3968 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
3974 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
3980 /* Checks if bitrates are available from upstream tags so that we don't
3981 * override them later
3984 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
3986 GstTagList *taglist = NULL;
3989 gst_event_parse_tag (event, &taglist);
3991 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
3992 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
3993 parse->priv->post_min_bitrate = FALSE;
3995 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
3996 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
3997 parse->priv->post_avg_bitrate = FALSE;
3999 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4000 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4001 parse->priv->post_max_bitrate = FALSE;
4006 gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
4008 GstBaseParse *parse;
4009 GstBaseParseClass *klass;
4010 gboolean res = TRUE;
4012 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
4013 klass = GST_BASE_PARSE_GET_CLASS (parse);
4015 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
4017 if (klass->set_sink_caps)
4018 res = klass->set_sink_caps (parse, caps);
4024 gst_base_parse_sink_getcaps (GstPad * pad)
4026 GstBaseParse *parse;
4027 GstBaseParseClass *klass;
4030 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
4031 klass = GST_BASE_PARSE_GET_CLASS (parse);
4032 g_assert (pad == GST_BASE_PARSE_SINK_PAD (parse));
4034 if (klass->get_sink_caps)
4035 caps = klass->get_sink_caps (parse);
4037 caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
4038 gst_object_unref (parse);
4040 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT, caps);
4046 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4048 GstBaseParse *parse = GST_BASE_PARSE (element);
4050 GST_BASE_PARSE_INDEX_LOCK (parse);
4051 if (parse->priv->index)
4052 gst_object_unref (parse->priv->index);
4054 parse->priv->index = gst_object_ref (index);
4055 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4056 &parse->priv->index_id);
4057 parse->priv->own_index = FALSE;
4059 parse->priv->index = NULL;
4061 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4065 gst_base_parse_get_index (GstElement * element)
4067 GstBaseParse *parse = GST_BASE_PARSE (element);
4068 GstIndex *result = NULL;
4070 GST_BASE_PARSE_INDEX_LOCK (parse);
4071 if (parse->priv->index)
4072 result = gst_object_ref (parse->priv->index);
4073 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4078 static GstStateChangeReturn
4079 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4081 GstBaseParse *parse;
4082 GstStateChangeReturn result;
4084 parse = GST_BASE_PARSE (element);
4086 switch (transition) {
4087 case GST_STATE_CHANGE_READY_TO_PAUSED:
4088 /* If this is our own index destroy it as the
4089 * old entries might be wrong for the new stream */
4090 GST_BASE_PARSE_INDEX_LOCK (parse);
4091 if (parse->priv->own_index) {
4092 gst_object_unref (parse->priv->index);
4093 parse->priv->index = NULL;
4094 parse->priv->own_index = FALSE;
4097 /* If no index was created, generate one */
4098 if (G_UNLIKELY (!parse->priv->index)) {
4099 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4101 parse->priv->index = gst_index_factory_make ("memindex");
4102 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4103 &parse->priv->index_id);
4104 parse->priv->own_index = TRUE;
4106 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4112 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4114 switch (transition) {
4115 case GST_STATE_CHANGE_PAUSED_TO_READY:
4116 gst_base_parse_reset (parse);