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;
462 gst_base_parse_finalize (GObject * object)
464 GstBaseParse *parse = GST_BASE_PARSE (object);
467 g_object_unref (parse->priv->adapter);
469 if (parse->priv->pending_segment) {
470 p_ev = &parse->priv->pending_segment;
471 gst_event_replace (p_ev, NULL);
473 if (parse->priv->close_segment) {
474 p_ev = &parse->priv->close_segment;
475 gst_event_replace (p_ev, NULL);
478 if (parse->priv->cache) {
479 gst_buffer_unref (parse->priv->cache);
480 parse->priv->cache = NULL;
483 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
485 g_list_free (parse->priv->pending_events);
486 parse->priv->pending_events = NULL;
488 g_queue_foreach (&parse->priv->queued_frames,
489 (GFunc) gst_base_parse_frame_free, NULL);
490 g_queue_clear (&parse->priv->queued_frames);
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 /* we know it is not alloc'ed, but maybe other stuff to free, some day ... */
780 parse->priv->frame._private_flags |=
781 GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
782 gst_base_parse_frame_free (&parse->priv->frame);
784 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
785 g_list_free (parse->priv->detect_buffers);
786 parse->priv->detect_buffers = NULL;
787 parse->priv->detect_buffers_size = 0;
788 GST_OBJECT_UNLOCK (parse);
791 /* gst_base_parse_check_frame:
792 * @parse: #GstBaseParse.
793 * @buffer: GstBuffer.
794 * @framesize: This will be set to tell the found frame size in bytes.
795 * @skipsize: Output parameter that tells how much data needs to be skipped
796 * in order to find the following frame header.
798 * Default callback for check_valid_frame.
800 * Returns: Always TRUE.
803 gst_base_parse_check_frame (GstBaseParse * parse,
804 GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
806 *framesize = GST_BUFFER_SIZE (frame->buffer);
812 /* gst_base_parse_parse_frame:
813 * @parse: #GstBaseParse.
814 * @buffer: #GstBuffer.
816 * Default callback for parse_frame.
819 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
821 GstBuffer *buffer = frame->buffer;
823 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
824 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
825 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
827 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
828 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
829 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
834 /* gst_base_parse_convert:
835 * @parse: #GstBaseParse.
836 * @src_format: #GstFormat describing the source format.
837 * @src_value: Source value to be converted.
838 * @dest_format: #GstFormat defining the converted format.
839 * @dest_value: Pointer where the conversion result will be put.
841 * Converts using configured "convert" vmethod in #GstBaseParse class.
843 * Returns: TRUE if conversion was successful.
846 gst_base_parse_convert (GstBaseParse * parse,
847 GstFormat src_format,
848 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
850 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
853 g_return_val_if_fail (dest_value != NULL, FALSE);
858 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
860 #ifndef GST_DISABLE_GST_DEBUG
863 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
864 GST_LOG_OBJECT (parse,
865 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
866 GST_TIME_ARGS (src_value), *dest_value);
867 } else if (dest_format == GST_FORMAT_TIME &&
868 src_format == GST_FORMAT_BYTES) {
869 GST_LOG_OBJECT (parse,
870 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
871 src_value, GST_TIME_ARGS (*dest_value));
873 GST_LOG_OBJECT (parse,
874 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
875 GST_STR_NULL (gst_format_get_name (src_format)),
876 GST_STR_NULL (gst_format_get_name (dest_format)),
877 src_value, *dest_value);
880 GST_DEBUG_OBJECT (parse, "conversion failed");
888 /* gst_base_parse_sink_event:
889 * @pad: #GstPad that received the event.
890 * @event: #GstEvent to be handled.
892 * Handler for sink pad events.
894 * Returns: TRUE if the event was handled.
897 gst_base_parse_sink_event (GstPad * pad, GstEvent * event)
900 GstBaseParseClass *bclass;
901 gboolean handled = FALSE;
904 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
905 bclass = GST_BASE_PARSE_GET_CLASS (parse);
907 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
908 GST_EVENT_TYPE_NAME (event));
910 /* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
912 if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
913 && GST_EVENT_TYPE (event) != GST_EVENT_NEWSEGMENT
914 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
915 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
917 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
918 /* See if any bitrate tags were posted */
919 gst_base_parse_handle_tag (parse, event);
921 parse->priv->pending_events =
922 g_list_append (parse->priv->pending_events, event);
926 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
927 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
928 /* We've not posted bitrate tags yet - do so now */
929 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
932 handled = bclass->event (parse, event);
935 handled = gst_base_parse_sink_eventfunc (parse, event);
938 ret = gst_pad_event_default (pad, event);
941 gst_object_unref (parse);
942 GST_DEBUG_OBJECT (parse, "event handled");
947 /* gst_base_parse_sink_eventfunc:
948 * @parse: #GstBaseParse.
949 * @event: #GstEvent to be handled.
951 * Element-level event handler function.
953 * The event will be unreffed only if it has been handled and this
954 * function returns %TRUE
956 * Returns: %TRUE if the event was handled and not need forwarding.
959 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
961 gboolean handled = FALSE;
964 switch (GST_EVENT_TYPE (event)) {
965 case GST_EVENT_NEWSEGMENT:
967 gdouble rate, applied_rate;
969 gint64 start, stop, pos, next_ts, offset = 0;
972 gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
973 &format, &start, &stop, &pos);
975 GST_DEBUG_OBJECT (parse, "newseg rate %g, applied rate %g, "
976 "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
977 ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
978 GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
980 if (format == GST_FORMAT_BYTES) {
981 GstClockTime seg_start, seg_stop;
982 GstBaseParseSeek *seek = NULL;
985 /* stop time is allowed to be open-ended, but not start & pos */
986 seg_stop = GST_CLOCK_TIME_NONE;
990 GST_OBJECT_LOCK (parse);
991 for (node = parse->priv->pending_seeks; node; node = node->next) {
992 GstBaseParseSeek *tmp = node->data;
994 if (tmp->offset == pos) {
999 parse->priv->pending_seeks =
1000 g_slist_remove (parse->priv->pending_seeks, seek);
1001 GST_OBJECT_UNLOCK (parse);
1004 GST_DEBUG_OBJECT (parse,
1005 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1006 seek->accurate ? " accurate" : "", &seek->segment);
1007 seg_start = seek->segment.start;
1008 seg_stop = seek->segment.stop;
1009 next_ts = seek->start_ts;
1010 parse->priv->exact_position = seek->accurate;
1013 /* best attempt convert */
1014 /* as these are only estimates, stop is kept open-ended to avoid
1015 * premature cutting */
1016 gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
1017 GST_FORMAT_TIME, (gint64 *) & seg_start);
1018 parse->priv->exact_position = (start == 0);
1019 next_ts = seg_start;
1022 gst_event_unref (event);
1023 event = gst_event_new_new_segment_full (update, rate, applied_rate,
1024 GST_FORMAT_TIME, seg_start, seg_stop, seg_start);
1025 format = GST_FORMAT_TIME;
1028 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
1029 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT,
1030 GST_TIME_ARGS (seg_start), GST_TIME_ARGS (seg_stop));
1031 } else if (format != GST_FORMAT_TIME) {
1032 /* Unknown incoming segment format. Output a default open-ended
1034 gst_event_unref (event);
1035 event = gst_event_new_new_segment_full (update, rate, applied_rate,
1036 GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
1037 format = GST_FORMAT_TIME;
1038 next_ts = start = 0;
1039 stop = GST_CLOCK_TIME_NONE;
1041 /* not considered BYTE seekable if it is talking to us in TIME,
1042 * whatever else it might claim */
1043 parse->priv->upstream_seekable = FALSE;
1047 gst_segment_set_newsegment_full (&parse->segment, update, rate,
1048 applied_rate, format, start, stop, start);
1050 /* save the segment for later, right before we push a new buffer so that
1051 * the caps are fixed and the next linked element can receive
1053 eventp = &parse->priv->pending_segment;
1054 gst_event_replace (eventp, event);
1055 gst_event_unref (event);
1058 /* but finish the current segment */
1059 GST_DEBUG_OBJECT (parse, "draining current segment");
1060 if (parse->segment.rate > 0.0)
1061 gst_base_parse_drain (parse);
1063 gst_base_parse_process_fragment (parse, FALSE);
1064 gst_adapter_clear (parse->priv->adapter);
1065 parse->priv->offset = offset;
1066 parse->priv->sync_offset = offset;
1067 parse->priv->next_ts = next_ts;
1068 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1069 parse->priv->discont = TRUE;
1070 parse->priv->seen_keyframe = FALSE;
1074 case GST_EVENT_FLUSH_START:
1075 parse->priv->flushing = TRUE;
1076 handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
1078 gst_event_unref (event);
1079 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1080 GST_PAD_STREAM_LOCK (parse->srcpad);
1081 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1085 case GST_EVENT_FLUSH_STOP:
1086 gst_adapter_clear (parse->priv->adapter);
1087 gst_base_parse_clear_queues (parse);
1088 parse->priv->flushing = FALSE;
1089 parse->priv->discont = TRUE;
1090 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1091 parse->priv->frame._private_flags |=
1092 GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
1093 gst_base_parse_frame_free (&parse->priv->frame);
1097 if (parse->segment.rate > 0.0)
1098 gst_base_parse_drain (parse);
1100 gst_base_parse_process_fragment (parse, FALSE);
1102 /* If we STILL have zero frames processed, fire an error */
1103 if (parse->priv->framecount == 0) {
1104 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1105 ("No valid frames found before end of stream"), (NULL));
1107 /* newsegment before eos */
1108 if (parse->priv->pending_segment) {
1109 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1110 parse->priv->pending_segment = NULL;
1122 /* gst_base_parse_src_event:
1123 * @pad: #GstPad that received the event.
1124 * @event: #GstEvent that was received.
1126 * Handler for source pad events.
1128 * Returns: TRUE if the event was handled.
1131 gst_base_parse_src_event (GstPad * pad, GstEvent * event)
1133 GstBaseParse *parse;
1134 GstBaseParseClass *bclass;
1135 gboolean handled = FALSE;
1136 gboolean ret = TRUE;
1138 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
1139 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1141 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1142 GST_EVENT_TYPE_NAME (event));
1144 if (bclass->src_event)
1145 handled = bclass->src_event (parse, event);
1148 ret = gst_pad_event_default (pad, event);
1150 gst_object_unref (parse);
1155 gst_base_parse_is_seekable (GstBaseParse * parse)
1157 /* FIXME: could do more here, e.g. check index or just send data from 0
1158 * in pull mode and let decoder/sink clip */
1159 return parse->priv->syncable;
1162 /* gst_base_parse_src_eventfunc:
1163 * @parse: #GstBaseParse.
1164 * @event: #GstEvent that was received.
1166 * Default srcpad event handler.
1168 * Returns: TRUE if the event was handled and can be dropped.
1171 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1173 gboolean handled = FALSE;
1175 switch (GST_EVENT_TYPE (event)) {
1176 case GST_EVENT_SEEK:
1178 if (gst_base_parse_is_seekable (parse)) {
1179 handled = gst_base_parse_handle_seek (parse, event);
1191 * gst_base_parse_convert_default:
1192 * @parse: #GstBaseParse.
1193 * @src_format: #GstFormat describing the source format.
1194 * @src_value: Source value to be converted.
1195 * @dest_format: #GstFormat defining the converted format.
1196 * @dest_value: Pointer where the conversion result will be put.
1198 * Default implementation of "convert" vmethod in #GstBaseParse class.
1200 * Returns: TRUE if conversion was successful.
1205 gst_base_parse_convert_default (GstBaseParse * parse,
1206 GstFormat src_format,
1207 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1209 gboolean ret = FALSE;
1210 guint64 bytes, duration;
1212 if (G_UNLIKELY (src_format == dest_format)) {
1213 *dest_value = src_value;
1217 if (G_UNLIKELY (src_value == -1)) {
1222 if (G_UNLIKELY (src_value == 0)) {
1227 /* need at least some frames */
1228 if (!parse->priv->framecount)
1231 duration = parse->priv->acc_duration / GST_MSECOND;
1232 bytes = parse->priv->bytecount;
1234 if (G_UNLIKELY (!duration || !bytes))
1237 if (src_format == GST_FORMAT_BYTES) {
1238 if (dest_format == GST_FORMAT_TIME) {
1239 /* BYTES -> TIME conversion */
1240 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1241 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1242 *dest_value *= GST_MSECOND;
1243 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1244 *dest_value / GST_MSECOND);
1247 } else if (src_format == GST_FORMAT_TIME) {
1248 if (dest_format == GST_FORMAT_BYTES) {
1249 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1250 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1252 GST_DEBUG_OBJECT (parse,
1253 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1254 src_value / GST_MSECOND, *dest_value);
1257 } else if (src_format == GST_FORMAT_DEFAULT) {
1258 /* DEFAULT == frame-based */
1259 if (dest_format == GST_FORMAT_TIME) {
1260 if (parse->priv->fps_den) {
1261 *dest_value = gst_util_uint64_scale (src_value,
1262 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1265 } else if (dest_format == GST_FORMAT_BYTES) {
1273 gst_base_parse_update_duration (GstBaseParse * baseparse)
1276 GstBaseParse *parse;
1278 parse = GST_BASE_PARSE (baseparse);
1280 peer = gst_pad_get_peer (parse->sinkpad);
1282 GstFormat pformat = GST_FORMAT_BYTES;
1283 gboolean qres = FALSE;
1284 gint64 ptot, dest_value;
1286 qres = gst_pad_query_duration (peer, &pformat, &ptot);
1287 gst_object_unref (GST_OBJECT (peer));
1289 if (gst_base_parse_convert (parse, pformat, ptot,
1290 GST_FORMAT_TIME, &dest_value)) {
1292 /* inform if duration changed, but try to avoid spamming */
1293 parse->priv->estimated_drift +=
1294 dest_value - parse->priv->estimated_duration;
1295 if (parse->priv->estimated_drift > GST_SECOND ||
1296 parse->priv->estimated_drift < -GST_SECOND) {
1297 gst_element_post_message (GST_ELEMENT (parse),
1298 gst_message_new_duration (GST_OBJECT (parse),
1299 GST_FORMAT_TIME, dest_value));
1300 parse->priv->estimated_drift = 0;
1302 parse->priv->estimated_duration = dest_value;
1303 GST_LOG_OBJECT (parse,
1304 "updated estimated duration to %" GST_TIME_FORMAT,
1305 GST_TIME_ARGS (dest_value));
1312 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1313 gboolean post_avg, gboolean post_max)
1315 GstTagList *taglist = NULL;
1317 if (post_min && parse->priv->post_min_bitrate) {
1318 taglist = gst_tag_list_new ();
1320 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1321 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1324 if (post_avg && parse->priv->post_avg_bitrate) {
1325 if (taglist == NULL)
1326 taglist = gst_tag_list_new ();
1328 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1329 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1330 parse->priv->avg_bitrate, NULL);
1333 if (post_max && parse->priv->post_max_bitrate) {
1334 if (taglist == NULL)
1335 taglist = gst_tag_list_new ();
1337 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1338 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1341 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1342 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1343 parse->priv->max_bitrate);
1345 if (taglist != NULL) {
1346 gst_element_found_tags_for_pad (GST_ELEMENT_CAST (parse), parse->srcpad,
1351 /* gst_base_parse_update_bitrates:
1352 * @parse: #GstBaseParse.
1353 * @buffer: Current frame as a #GstBuffer
1355 * Keeps track of the minimum and maximum bitrates, and also maintains a
1356 * running average bitrate of the stream so far.
1359 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1361 /* Only update the tag on a 10 kbps delta */
1362 static const gint update_threshold = 10000;
1364 guint64 data_len, frame_dur;
1365 gint overhead, frame_bitrate, old_avg_bitrate;
1366 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1367 GstBuffer *buffer = frame->buffer;
1369 overhead = frame->overhead;
1373 data_len = GST_BUFFER_SIZE (buffer) - overhead;
1374 parse->priv->data_bytecount += data_len;
1376 /* duration should be valid by now,
1377 * either set by subclass or maybe based on fps settings */
1378 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1379 /* Calculate duration of a frame from buffer properties */
1380 frame_dur = GST_BUFFER_DURATION (buffer);
1381 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1382 parse->priv->acc_duration;
1385 /* No way to figure out frame duration (is this even possible?) */
1389 /* override if subclass provided bitrate, e.g. metadata based */
1390 if (parse->priv->bitrate) {
1391 parse->priv->avg_bitrate = parse->priv->bitrate;
1392 /* spread this (confirmed) info ASAP */
1393 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1394 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1398 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1402 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1403 parse->priv->avg_bitrate);
1405 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1407 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1408 /* always post all at threshold time */
1409 update_min = update_max = update_avg = TRUE;
1412 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1413 if (frame_bitrate < parse->priv->min_bitrate) {
1414 parse->priv->min_bitrate = frame_bitrate;
1418 if (frame_bitrate > parse->priv->max_bitrate) {
1419 parse->priv->max_bitrate = frame_bitrate;
1423 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1424 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1425 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1430 if ((update_min || update_avg || update_max))
1431 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1433 /* If average bitrate changes that much and no valid (time) duration provided,
1434 * then post a new duration message so applications can update their cached
1436 if (update_avg && !(parse->priv->duration_fmt == GST_FORMAT_TIME &&
1437 GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
1438 gst_element_post_message (GST_ELEMENT (parse),
1439 gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
1446 * gst_base_parse_add_index_entry:
1447 * @parse: #GstBaseParse.
1448 * @offset: offset of entry
1449 * @ts: timestamp associated with offset
1450 * @key: whether entry refers to keyframe
1451 * @force: add entry disregarding sanity checks
1453 * Adds an entry to the index associating @offset to @ts. It is recommended
1454 * to only add keyframe entries. @force allows to bypass checks, such as
1455 * whether the stream is (upstream) seekable, another entry is already "close"
1456 * to the new entry, etc.
1458 * Returns: #gboolean indicating whether entry was added
1463 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1464 GstClockTime ts, gboolean key, gboolean force)
1466 gboolean ret = FALSE;
1467 GstIndexAssociation associations[2];
1469 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1470 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1472 if (G_LIKELY (!force)) {
1474 if (!parse->priv->upstream_seekable) {
1475 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1479 /* FIXME need better helper data structure that handles these issues
1480 * related to ongoing collecting of index entries */
1481 if (parse->priv->index_last_offset >= (gint64) offset) {
1482 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1483 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1487 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1488 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1489 parse->priv->idx_interval) {
1490 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1491 GST_TIME_ARGS (parse->priv->index_last_ts));
1495 /* if last is not really the last one */
1496 if (!parse->priv->index_last_valid) {
1497 GstClockTime prev_ts;
1499 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1500 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1501 GST_DEBUG_OBJECT (parse,
1502 "entry too close to existing entry %" GST_TIME_FORMAT,
1503 GST_TIME_ARGS (prev_ts));
1504 parse->priv->index_last_offset = offset;
1505 parse->priv->index_last_ts = ts;
1511 associations[0].format = GST_FORMAT_TIME;
1512 associations[0].value = ts;
1513 associations[1].format = GST_FORMAT_BYTES;
1514 associations[1].value = offset;
1516 /* index might change on-the-fly, although that would be nutty app ... */
1517 GST_BASE_PARSE_INDEX_LOCK (parse);
1518 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1519 (key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_DELTA_UNIT,
1520 2, (const GstIndexAssociation *) &associations);
1521 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1524 parse->priv->index_last_offset = offset;
1525 parse->priv->index_last_ts = ts;
1534 /* check for seekable upstream, above and beyond a mere query */
1536 gst_base_parse_check_seekability (GstBaseParse * parse)
1539 gboolean seekable = FALSE;
1540 gint64 start = -1, stop = -1;
1541 guint idx_interval = 0;
1543 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1544 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1545 GST_DEBUG_OBJECT (parse, "seeking query failed");
1549 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1551 /* try harder to query upstream size if we didn't get it the first time */
1552 if (seekable && stop == -1) {
1553 GstFormat fmt = GST_FORMAT_BYTES;
1555 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1556 gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop);
1559 /* if upstream doesn't know the size, it's likely that it's not seekable in
1560 * practice even if it technically may be seekable */
1561 if (seekable && (start != 0 || stop <= start)) {
1562 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1566 /* let's not put every single frame into our index */
1568 if (stop < 10 * 1024 * 1024)
1570 else if (stop < 100 * 1024 * 1024)
1573 idx_interval = 1000;
1577 gst_query_unref (query);
1579 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1580 G_GUINT64_FORMAT ")", seekable, start, stop);
1581 parse->priv->upstream_seekable = seekable;
1582 parse->priv->upstream_size = seekable ? stop : 0;
1584 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1585 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1588 /* some misc checks on upstream */
1590 gst_base_parse_check_upstream (GstBaseParse * parse)
1592 GstFormat fmt = GST_FORMAT_TIME;
1595 if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
1596 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1597 /* upstream has one, accept it also, and no further updates */
1598 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1599 parse->priv->upstream_has_duration = TRUE;
1602 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1603 parse->priv->upstream_has_duration);
1606 /* checks src caps to determine if dealing with audio or video */
1607 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1609 gst_base_parse_check_media (GstBaseParse * parse)
1614 caps = GST_PAD_CAPS (parse->srcpad);
1615 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1616 parse->priv->is_video =
1617 g_str_has_prefix (gst_structure_get_name (s), "video");
1619 /* historical default */
1620 parse->priv->is_video = FALSE;
1623 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1626 /* takes ownership of frame */
1628 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1630 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1631 /* frame allocated on the heap, we can just take ownership */
1632 g_queue_push_tail (&parse->priv->queued_frames, frame);
1633 GST_TRACE ("queued frame %p", frame);
1635 GstBaseParseFrame *copy;
1637 /* probably allocated on the stack, must make a proper copy */
1638 copy = gst_base_parse_frame_copy (frame);
1639 g_queue_push_tail (&parse->priv->queued_frames, copy);
1640 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1641 gst_base_parse_frame_free (frame);
1645 /* gst_base_parse_handle_and_push_buffer:
1646 * @parse: #GstBaseParse.
1647 * @klass: #GstBaseParseClass.
1648 * @frame: (transfer full): a #GstBaseParseFrame
1650 * Parses the frame from given buffer and pushes it forward. Also performs
1651 * timestamp handling and checks the segment limits.
1653 * This is called with srcpad STREAM_LOCK held.
1655 * Returns: #GstFlowReturn
1657 static GstFlowReturn
1658 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1659 GstBaseParseClass * klass, GstBaseParseFrame * frame)
1665 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1667 buffer = frame->buffer;
1669 if (parse->priv->discont) {
1670 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1671 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1672 parse->priv->discont = FALSE;
1675 /* some one-time start-up */
1676 if (G_UNLIKELY (!parse->priv->framecount)) {
1677 gst_base_parse_check_seekability (parse);
1678 gst_base_parse_check_upstream (parse);
1681 GST_LOG_OBJECT (parse,
1682 "parsing frame at offset %" G_GUINT64_FORMAT
1683 " (%#" G_GINT64_MODIFIER "x) of size %d",
1684 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1685 GST_BUFFER_SIZE (buffer));
1687 /* use default handler to provide initial (upstream) metadata */
1688 gst_base_parse_parse_frame (parse, frame);
1690 /* store offset as it might get overwritten */
1691 offset = GST_BUFFER_OFFSET (buffer);
1692 ret = klass->parse_frame (parse, frame);
1694 buffer = frame->buffer;
1695 /* subclass must play nice */
1696 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1698 /* check if subclass/format can provide ts.
1699 * If so, that allows and enables extra seek and duration determining options */
1700 if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
1701 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1702 && parse->priv->pad_mode == GST_ACTIVATE_PULL) {
1703 parse->priv->first_frame_offset = offset;
1704 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1705 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1706 " for first frame at offset %" G_GINT64_FORMAT,
1707 GST_TIME_ARGS (parse->priv->first_frame_ts),
1708 parse->priv->first_frame_offset);
1709 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1711 GstClockTime last_ts = G_MAXINT64;
1713 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1714 gst_base_parse_locate_time (parse, &last_ts, &off);
1715 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1716 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1719 /* disable further checks */
1720 parse->priv->first_frame_offset = 0;
1724 /* again use default handler to add missing metadata;
1725 * we may have new information on frame properties */
1726 gst_base_parse_parse_frame (parse, frame);
1727 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1728 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1729 parse->priv->next_ts =
1730 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1732 /* we lost track, do not produce bogus time next time around
1733 * (probably means parser subclass has given up on parsing as well) */
1734 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1735 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1738 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1739 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1740 gst_base_parse_add_index_entry (parse, offset,
1741 GST_BUFFER_TIMESTAMP (buffer),
1742 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1744 /* First buffers are dropped, this means that the subclass needs more
1745 * frames to decide on the format and queues them internally */
1746 /* convert internal flow to OK and mark discont for the next buffer. */
1747 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1748 gst_base_parse_frame_free (frame);
1750 } else if (ret == GST_BASE_PARSE_FLOW_QUEUED) {
1751 gst_base_parse_queue_frame (parse, frame);
1753 } else if (ret != GST_FLOW_OK) {
1757 /* All OK, push queued frames if there are any */
1758 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1759 GstBaseParseFrame *queued_frame;
1761 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1762 queued_frame->buffer =
1763 gst_buffer_make_metadata_writable (queued_frame->buffer);
1764 gst_buffer_set_caps (queued_frame->buffer,
1765 GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (parse)));
1766 gst_base_parse_push_frame (parse, queued_frame);
1770 return gst_base_parse_push_frame (parse, frame);
1774 * gst_base_parse_push_frame:
1775 * @parse: #GstBaseParse.
1776 * @frame: (transfer full): a #GstBaseParseFrame
1778 * Pushes the frame downstream, sends any pending events and
1779 * does some timestamp and segment handling. Takes ownership
1780 * of @frame and will clear it (if it was initialised with
1781 * gst_base_parse_frame_init()) or free it.
1783 * This must be called with sinkpad STREAM_LOCK held.
1785 * Returns: #GstFlowReturn
1790 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1792 GstFlowReturn ret = GST_FLOW_OK;
1793 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1794 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1795 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1798 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1799 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1801 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1803 buffer = frame->buffer;
1805 GST_LOG_OBJECT (parse,
1806 "processing buffer of size %d with ts %" GST_TIME_FORMAT
1807 ", duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buffer),
1808 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1809 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1812 parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
1813 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1814 parse->priv->framecount++;
1815 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1816 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1819 /* 0 means disabled */
1820 if (parse->priv->update_interval < 0)
1821 parse->priv->update_interval = 50;
1822 else if (parse->priv->update_interval > 0 &&
1823 (parse->priv->framecount % parse->priv->update_interval) == 0)
1824 gst_base_parse_update_duration (parse);
1826 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1827 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1828 if (last_start != GST_CLOCK_TIME_NONE
1829 && GST_BUFFER_DURATION_IS_VALID (buffer))
1830 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1832 /* should have caps by now */
1833 g_return_val_if_fail (GST_PAD_CAPS (parse->srcpad), GST_FLOW_ERROR);
1835 /* segment adjustment magic; only if we are running the whole show */
1836 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
1837 (parse->priv->pad_mode == GST_ACTIVATE_PULL ||
1838 parse->priv->upstream_seekable)) {
1839 /* segment times are typically estimates,
1840 * actual frame data might lead subclass to different timestamps,
1841 * so override segment start from what is supplied there */
1842 if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
1843 && GST_CLOCK_TIME_IS_VALID (last_start))) {
1844 gst_event_unref (parse->priv->pending_segment);
1845 parse->segment.start =
1846 MIN ((guint64) last_start, (guint64) parse->segment.stop);
1847 GST_DEBUG_OBJECT (parse,
1848 "adjusting pending segment start to %" GST_TIME_FORMAT,
1849 GST_TIME_ARGS (parse->segment.start));
1850 parse->priv->pending_segment =
1851 gst_event_new_new_segment (FALSE, parse->segment.rate,
1852 parse->segment.format, parse->segment.start,
1853 parse->segment.stop, parse->segment.start);
1855 /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
1856 if (GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop) &&
1857 GST_CLOCK_TIME_IS_VALID (last_start)) {
1858 GstClockTimeDiff diff;
1860 /* only send newsegments with increasing start times,
1861 * otherwise if these go back and forth downstream (sinks) increase
1862 * accumulated time and running_time */
1863 diff = GST_CLOCK_DIFF (parse->segment.last_stop, last_start);
1864 if (G_UNLIKELY (diff > 2 * GST_SECOND
1865 && last_start > parse->segment.start
1866 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
1867 || last_start < parse->segment.stop))) {
1868 GST_DEBUG_OBJECT (parse,
1869 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
1870 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
1871 "Sending updated NEWSEGMENT events", diff,
1872 GST_TIME_ARGS (parse->segment.last_stop),
1873 GST_TIME_ARGS (last_start));
1874 if (G_UNLIKELY (parse->priv->pending_segment)) {
1875 gst_event_unref (parse->priv->pending_segment);
1876 parse->segment.start = last_start;
1877 parse->priv->pending_segment =
1878 gst_event_new_new_segment (FALSE, parse->segment.rate,
1879 parse->segment.format, parse->segment.start,
1880 parse->segment.stop, parse->segment.start);
1882 /* send newsegment events such that the gap is not accounted in
1883 * accum time, hence running_time */
1884 /* close ahead of gap */
1885 gst_pad_push_event (parse->srcpad,
1886 gst_event_new_new_segment (TRUE, parse->segment.rate,
1887 parse->segment.format, parse->segment.last_stop,
1888 parse->segment.last_stop, parse->segment.last_stop));
1890 gst_pad_push_event (parse->srcpad,
1891 gst_event_new_new_segment (FALSE, parse->segment.rate,
1892 parse->segment.format, last_start,
1893 parse->segment.stop, last_start));
1895 /* align segment view with downstream,
1896 * prevents double-counting accum when closing segment */
1897 gst_segment_set_newsegment (&parse->segment, FALSE,
1898 parse->segment.rate, parse->segment.format, last_start,
1899 parse->segment.stop, last_start);
1900 parse->segment.last_stop = last_start;
1905 /* and should then also be linked downstream, so safe to send some events */
1906 if (G_UNLIKELY (parse->priv->close_segment)) {
1907 /* only set up by loop */
1908 GST_DEBUG_OBJECT (parse, "loop sending close segment");
1909 gst_pad_push_event (parse->srcpad, parse->priv->close_segment);
1910 parse->priv->close_segment = NULL;
1912 if (G_UNLIKELY (parse->priv->pending_segment)) {
1913 GstEvent *pending_segment;
1915 pending_segment = parse->priv->pending_segment;
1916 parse->priv->pending_segment = NULL;
1918 GST_DEBUG_OBJECT (parse, "%s push pending segment",
1919 parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
1920 gst_pad_push_event (parse->srcpad, pending_segment);
1922 /* have caps; check identity */
1923 gst_base_parse_check_media (parse);
1926 /* update bitrates and optionally post corresponding tags
1927 * (following newsegment) */
1928 gst_base_parse_update_bitrates (parse, frame);
1930 if (G_UNLIKELY (parse->priv->pending_events)) {
1933 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1934 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1936 g_list_free (parse->priv->pending_events);
1937 parse->priv->pending_events = NULL;
1940 if (klass->pre_push_frame) {
1941 ret = klass->pre_push_frame (parse, frame);
1943 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
1946 /* take final ownership of frame buffer */
1947 buffer = frame->buffer;
1948 frame->buffer = NULL;
1950 /* subclass must play nice */
1951 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1954 buffer = gst_buffer_make_metadata_writable (buffer);
1955 gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
1957 parse->priv->seen_keyframe |= parse->priv->is_video &&
1958 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
1960 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
1961 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1962 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
1963 GST_BUFFER_TIMESTAMP (buffer) >
1964 parse->segment.stop + parse->priv->lead_out_ts) {
1965 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
1966 ret = GST_FLOW_UNEXPECTED;
1967 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1968 GST_BUFFER_DURATION_IS_VALID (buffer) &&
1969 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
1970 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
1971 parse->priv->lead_in_ts < parse->segment.start) {
1972 if (parse->priv->seen_keyframe) {
1973 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
1976 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
1977 ret = GST_BASE_PARSE_FLOW_DROPPED;
1984 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1985 GST_LOG_OBJECT (parse, "frame (%d bytes) dropped",
1986 GST_BUFFER_SIZE (buffer));
1987 gst_buffer_unref (buffer);
1989 } else if (ret == GST_FLOW_OK) {
1990 if (parse->segment.rate > 0.0) {
1991 GST_LOG_OBJECT (parse, "pushing frame (%d bytes) now..",
1992 GST_BUFFER_SIZE (buffer));
1993 ret = gst_pad_push (parse->srcpad, buffer);
1994 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
1996 GST_LOG_OBJECT (parse, "frame (%d bytes) queued for now",
1997 GST_BUFFER_SIZE (buffer));
1998 parse->priv->buffers_queued =
1999 g_slist_prepend (parse->priv->buffers_queued, buffer);
2003 GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
2004 GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
2005 gst_buffer_unref (buffer);
2006 /* if we are not sufficiently in control, let upstream decide on EOS */
2007 if (ret == GST_FLOW_UNEXPECTED &&
2008 (parse->priv->passthrough ||
2009 (parse->priv->pad_mode == GST_ACTIVATE_PUSH &&
2010 !parse->priv->upstream_seekable)))
2014 /* Update current running segment position */
2015 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2016 parse->segment.last_stop < last_stop)
2017 gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
2019 gst_base_parse_frame_free (frame);
2025 /* gst_base_parse_drain:
2027 * Drains the adapter until it is empty. It decreases the min_frame_size to
2028 * match the current adapter size and calls chain method until the adapter
2029 * is emptied or chain returns with error.
2032 gst_base_parse_drain (GstBaseParse * parse)
2036 GST_DEBUG_OBJECT (parse, "draining");
2037 parse->priv->drain = TRUE;
2040 avail = gst_adapter_available (parse->priv->adapter);
2044 if (gst_base_parse_chain (parse->sinkpad, NULL) != GST_FLOW_OK) {
2048 /* nothing changed, maybe due to truncated frame; break infinite loop */
2049 if (avail == gst_adapter_available (parse->priv->adapter)) {
2050 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2051 gst_adapter_clear (parse->priv->adapter);
2055 parse->priv->drain = FALSE;
2058 /* gst_base_parse_send_buffers
2060 * Sends buffers collected in send_buffers downstream, and ensures that list
2061 * is empty at the end (errors or not).
2063 static GstFlowReturn
2064 gst_base_parse_send_buffers (GstBaseParse * parse)
2066 GSList *send = NULL;
2068 GstFlowReturn ret = GST_FLOW_OK;
2070 send = parse->priv->buffers_send;
2074 buf = GST_BUFFER_CAST (send->data);
2075 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
2076 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2077 ", offset %" G_GINT64_FORMAT, buf,
2078 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2079 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2081 /* iterate output queue an push downstream */
2082 ret = gst_pad_push (parse->srcpad, buf);
2083 send = g_slist_delete_link (send, send);
2085 /* clear any leftover if error */
2086 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2088 buf = GST_BUFFER_CAST (send->data);
2089 gst_buffer_unref (buf);
2090 send = g_slist_delete_link (send, send);
2095 parse->priv->buffers_send = send;
2100 /* gst_base_parse_process_fragment:
2102 * Processes a reverse playback (forward) fragment:
2103 * - append head of last fragment that was skipped to current fragment data
2104 * - drain the resulting current fragment data (i.e. repeated chain)
2105 * - add time/duration (if needed) to frames queued by chain
2106 * - push queued data
2108 static GstFlowReturn
2109 gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
2112 GstFlowReturn ret = GST_FLOW_OK;
2113 gboolean seen_key = FALSE, seen_delta = FALSE;
2119 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2120 while (parse->priv->buffers_pending) {
2121 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2122 GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
2123 GST_BUFFER_SIZE (buf));
2124 gst_adapter_push (parse->priv->adapter, buf);
2125 parse->priv->buffers_pending =
2126 g_slist_delete_link (parse->priv->buffers_pending,
2127 parse->priv->buffers_pending);
2130 /* invalidate so no fall-back timestamping is performed;
2131 * ok if taken from subclass or upstream */
2132 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2133 /* prevent it hanging around stop all the time */
2134 parse->segment.last_stop = GST_CLOCK_TIME_NONE;
2136 parse->priv->discont = TRUE;
2138 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2139 /* initial skipped data is added to buffers_pending */
2140 gst_base_parse_drain (parse);
2143 if (parse->priv->buffers_send) {
2144 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2145 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2148 /* add metadata (if needed to queued buffers */
2149 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2150 GST_TIME_ARGS (parse->priv->last_ts));
2151 while (parse->priv->buffers_queued) {
2152 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2154 /* no touching if upstream or parsing provided time */
2155 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2156 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2157 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2158 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2159 GST_BUFFER_DURATION_IS_VALID (buf)) {
2160 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2161 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2163 parse->priv->last_ts = 0;
2164 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2165 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2166 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2168 /* no idea, very bad */
2169 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2172 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2174 /* reverse order for ascending sending */
2175 /* send downstream at keyframe not preceded by a keyframe
2176 * (e.g. that should identify start of collection of IDR nals) */
2177 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2179 ret = gst_base_parse_send_buffers (parse);
2180 /* if a problem, throw all to sending */
2181 if (ret != GST_FLOW_OK) {
2182 parse->priv->buffers_send =
2183 g_slist_reverse (parse->priv->buffers_queued);
2184 parse->priv->buffers_queued = NULL;
2193 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2195 parse->priv->buffers_send =
2196 g_slist_prepend (parse->priv->buffers_send, buf);
2197 parse->priv->buffers_queued =
2198 g_slist_delete_link (parse->priv->buffers_queued,
2199 parse->priv->buffers_queued);
2202 /* audio may have all marked as keyframe, so arrange to send here */
2204 ret = gst_base_parse_send_buffers (parse);
2206 /* any trailing unused no longer usable (ideally none) */
2207 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2208 GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
2209 gst_adapter_available (parse->priv->adapter));
2210 gst_adapter_clear (parse->priv->adapter);
2216 /* small helper that checks whether we have been trying to resync too long */
2217 static inline GstFlowReturn
2218 gst_base_parse_check_sync (GstBaseParse * parse)
2220 if (G_UNLIKELY (parse->priv->discont &&
2221 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2222 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2223 ("Failed to parse stream"), (NULL));
2224 return GST_FLOW_ERROR;
2230 static GstFlowReturn
2231 gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
2233 GstBaseParseClass *bclass;
2234 GstBaseParse *parse;
2235 GstFlowReturn ret = GST_FLOW_OK;
2236 GstBuffer *outbuf = NULL;
2237 GstBuffer *tmpbuf = NULL;
2241 guint old_min_size = 0, min_size, av;
2242 GstClockTime timestamp;
2243 GstBaseParseFrame *frame;
2245 parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
2246 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2248 if (parse->priv->detecting) {
2249 GstBuffer *detect_buf;
2251 if (parse->priv->detect_buffers_size == 0) {
2252 detect_buf = gst_buffer_ref (buffer);
2258 gst_buffer_new_and_alloc (parse->priv->detect_buffers_size +
2259 (buffer ? GST_BUFFER_SIZE (buffer) : 0));
2260 for (l = parse->priv->detect_buffers; l; l = l->next) {
2261 memcpy (GST_BUFFER_DATA (detect_buf) + offset,
2262 GST_BUFFER_DATA (l->data), GST_BUFFER_SIZE (l->data));
2263 offset += GST_BUFFER_SIZE (l->data);
2266 memcpy (GST_BUFFER_DATA (detect_buf) + offset, GST_BUFFER_DATA (buffer),
2267 GST_BUFFER_SIZE (buffer));
2270 ret = bclass->detect (parse, detect_buf);
2271 gst_buffer_unref (detect_buf);
2273 if (ret == GST_FLOW_OK) {
2276 /* Detected something */
2277 parse->priv->detecting = FALSE;
2279 for (l = parse->priv->detect_buffers; l; l = l->next) {
2280 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2282 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2283 GST_BUFFER_CAST (l->data));
2285 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2287 g_list_free (parse->priv->detect_buffers);
2288 parse->priv->detect_buffers = NULL;
2289 parse->priv->detect_buffers_size = 0;
2291 if (ret != GST_FLOW_OK) {
2295 /* Handle the current buffer */
2296 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2297 /* Still detecting, append buffer or error out if draining */
2299 if (parse->priv->drain) {
2300 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2301 return GST_FLOW_ERROR;
2302 } else if (parse->priv->flushing) {
2303 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2305 g_list_free (parse->priv->detect_buffers);
2306 parse->priv->detect_buffers = NULL;
2307 parse->priv->detect_buffers_size = 0;
2309 parse->priv->detect_buffers =
2310 g_list_append (parse->priv->detect_buffers, buffer);
2311 parse->priv->detect_buffers_size += GST_BUFFER_SIZE (buffer);
2315 /* Something went wrong, subclass responsible for error reporting */
2319 /* And now handle the current buffer if detection worked */
2322 frame = &parse->priv->frame;
2324 if (G_LIKELY (buffer)) {
2325 GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
2326 GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
2327 if (G_UNLIKELY (parse->priv->passthrough)) {
2328 gst_base_parse_frame_init (frame);
2329 frame->buffer = gst_buffer_make_metadata_writable (buffer);
2330 return gst_base_parse_push_frame (parse, frame);
2332 /* upstream feeding us in reverse playback;
2333 * gather each fragment, then process it in single run */
2334 if (parse->segment.rate < 0.0) {
2335 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2336 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2337 ret = gst_base_parse_process_fragment (parse, FALSE);
2339 gst_adapter_push (parse->priv->adapter, buffer);
2342 gst_adapter_push (parse->priv->adapter, buffer);
2345 if (G_UNLIKELY (buffer &&
2346 GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2347 frame->_private_flags |= GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
2348 gst_base_parse_frame_free (frame);
2351 /* Parse and push as many frames as possible */
2352 /* Stop either when adapter is empty or we are flushing */
2353 while (!parse->priv->flushing) {
2356 /* maintain frame state for a single frame parsing round across _chain calls,
2357 * so only init when needed */
2358 if (!frame->_private_flags)
2359 gst_base_parse_frame_init (frame);
2361 tmpbuf = gst_buffer_new ();
2364 /* Synchronization loop */
2366 /* note: if subclass indicates MAX fsize,
2367 * this will not likely be available anyway ... */
2368 min_size = MAX (parse->priv->min_frame_size, fsize);
2369 av = gst_adapter_available (parse->priv->adapter);
2371 /* loop safety check */
2372 if (G_UNLIKELY (old_min_size >= min_size))
2374 old_min_size = min_size;
2376 if (G_UNLIKELY (parse->priv->drain)) {
2378 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2379 if (G_UNLIKELY (!min_size)) {
2380 gst_buffer_unref (tmpbuf);
2385 /* Collect at least min_frame_size bytes */
2386 if (av < min_size) {
2387 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
2389 gst_buffer_unref (tmpbuf);
2393 /* always pass all available data */
2394 data = gst_adapter_peek (parse->priv->adapter, av);
2395 GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
2396 GST_BUFFER_SIZE (tmpbuf) = av;
2397 GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
2398 GST_BUFFER_FLAG_SET (tmpbuf, GST_MINI_OBJECT_FLAG_READONLY);
2400 if (parse->priv->discont) {
2401 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2402 GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
2406 gst_base_parse_frame_update (parse, frame, tmpbuf);
2407 res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
2408 gst_buffer_replace (&frame->buffer, NULL);
2410 if (gst_adapter_available (parse->priv->adapter) < fsize) {
2411 GST_DEBUG_OBJECT (parse,
2412 "found valid frame but not enough data available (only %d bytes)",
2413 gst_adapter_available (parse->priv->adapter));
2414 gst_buffer_unref (tmpbuf);
2417 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2421 /* subclass didn't touch this value. By default we skip 1 byte */
2425 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2426 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2427 /* reverse playback, and no frames found yet, so we are skipping
2428 * the leading part of a fragment, which may form the tail of
2429 * fragment coming later, hopefully subclass skips efficiently ... */
2430 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2431 outbuf = gst_adapter_take_buffer (parse->priv->adapter, skip);
2432 outbuf = gst_buffer_make_metadata_writable (outbuf);
2433 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
2434 parse->priv->buffers_pending =
2435 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2438 gst_adapter_flush (parse->priv->adapter, skip);
2440 parse->priv->offset += skip;
2441 if (!parse->priv->discont)
2442 parse->priv->sync_offset = parse->priv->offset;
2443 parse->priv->discont = TRUE;
2444 /* something changed least; nullify loop check */
2447 /* skip == 0 should imply subclass set min_size to need more data;
2448 * we check this shortly */
2449 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2450 gst_buffer_unref (tmpbuf);
2454 gst_buffer_unref (tmpbuf);
2458 /* Subclass found the sync, but still wants to skip some data */
2459 GST_LOG_OBJECT (parse, "skipping %d bytes", skip);
2460 gst_adapter_flush (parse->priv->adapter, skip);
2461 parse->priv->offset += skip;
2464 /* Grab lock to prevent a race with FLUSH_START handler */
2465 GST_PAD_STREAM_LOCK (parse->srcpad);
2467 /* FLUSH_START event causes the "flushing" flag to be set. In this
2468 * case we can leave the frame pushing loop */
2469 if (parse->priv->flushing) {
2470 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2474 /* move along with upstream timestamp (if any),
2475 * but interpolate in between */
2476 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2477 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2478 (parse->priv->prev_ts != timestamp)) {
2479 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2482 /* FIXME: Would it be more efficient to make a subbuffer instead? */
2483 outbuf = gst_adapter_take_buffer (parse->priv->adapter, fsize);
2484 outbuf = gst_buffer_make_metadata_writable (outbuf);
2486 /* Subclass may want to know the data offset */
2487 GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
2488 parse->priv->offset += fsize;
2489 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2490 GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
2492 frame->buffer = outbuf;
2493 ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
2494 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2496 if (ret != GST_FLOW_OK) {
2497 GST_LOG_OBJECT (parse, "push returned %d", ret);
2503 GST_LOG_OBJECT (parse, "chain leaving");
2509 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2510 ("min_size evolution %d -> %d; breaking to avoid looping",
2511 old_min_size, min_size));
2512 return GST_FLOW_ERROR;
2516 /* pull @size bytes at current offset,
2517 * i.e. at least try to and possibly return a shorter buffer if near the end */
2518 static GstFlowReturn
2519 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2520 GstBuffer ** buffer)
2522 GstFlowReturn ret = GST_FLOW_OK;
2524 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2526 /* Caching here actually makes much less difference than one would expect.
2527 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2528 if (parse->priv->cache) {
2529 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2530 gint cache_size = GST_BUFFER_SIZE (parse->priv->cache);
2532 if (cache_offset <= parse->priv->offset &&
2533 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2534 *buffer = gst_buffer_create_sub (parse->priv->cache,
2535 parse->priv->offset - cache_offset, size);
2536 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2539 /* not enough data in the cache, free cache and get a new one */
2540 gst_buffer_unref (parse->priv->cache);
2541 parse->priv->cache = NULL;
2544 /* refill the cache */
2546 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2547 64 * 1024), &parse->priv->cache);
2548 if (ret != GST_FLOW_OK) {
2549 parse->priv->cache = NULL;
2553 if (GST_BUFFER_SIZE (parse->priv->cache) >= size) {
2554 *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
2555 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2559 /* Not possible to get enough data, try a last time with
2560 * requesting exactly the size we need */
2561 gst_buffer_unref (parse->priv->cache);
2562 parse->priv->cache = NULL;
2564 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2565 &parse->priv->cache);
2567 if (ret != GST_FLOW_OK) {
2568 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2573 if (GST_BUFFER_SIZE (parse->priv->cache) < size) {
2574 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2575 G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", parse->priv->offset,
2576 size, GST_BUFFER_SIZE (parse->priv->cache));
2578 *buffer = parse->priv->cache;
2579 parse->priv->cache = NULL;
2584 *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
2585 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2590 static GstFlowReturn
2591 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2594 GstClockTime ts = 0;
2598 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2599 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2600 parse->priv->last_offset);
2602 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2603 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2604 GST_TIME_ARGS (parse->segment.start));
2605 ret = GST_FLOW_UNEXPECTED;
2609 /* last fragment started at last_offset / last_ts;
2610 * seek back 10s capped at 1MB */
2611 if (parse->priv->last_ts >= 10 * GST_SECOND)
2612 ts = parse->priv->last_ts - 10 * GST_SECOND;
2613 /* if we are exact now, we will be more so going backwards */
2614 if (parse->priv->exact_position) {
2615 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2617 GstFormat dstformat = GST_FORMAT_BYTES;
2619 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2620 &dstformat, &offset)) {
2621 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2624 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2625 parse->priv->last_offset - 1024);
2626 offset = MAX (0, offset);
2628 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2630 parse->priv->offset = offset;
2632 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2634 if (ret != GST_FLOW_OK)
2637 /* offset will increase again as fragment is processed/parsed */
2638 parse->priv->last_offset = offset;
2640 gst_adapter_push (parse->priv->adapter, buffer);
2641 ret = gst_base_parse_process_fragment (parse, FALSE);
2642 if (ret != GST_FLOW_OK)
2645 /* force previous fragment */
2646 parse->priv->offset = -1;
2653 * pull and scan for next frame starting from current offset
2654 * ajusts sync, drain and offset going along */
2655 static GstFlowReturn
2656 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2657 GstBaseParseFrame * frame, gboolean full)
2659 GstBuffer *buffer, *outbuf;
2660 GstFlowReturn ret = GST_FLOW_OK;
2661 guint fsize = 1, min_size, old_min_size = 0;
2664 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2666 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2667 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2669 /* let's make this efficient for all subclass once and for all;
2670 * maybe it does not need this much, but in the latter case, we know we are
2671 * in pull mode here and might as well try to read and supply more anyway
2672 * (so does the buffer caching mechanism) */
2678 min_size = MAX (parse->priv->min_frame_size, fsize);
2679 /* loop safety check */
2680 if (G_UNLIKELY (old_min_size >= min_size))
2682 old_min_size = min_size;
2684 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2685 if (ret != GST_FLOW_OK)
2688 if (parse->priv->discont) {
2689 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2690 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
2693 /* if we got a short read, inform subclass we are draining leftover
2694 * and no more is to be expected */
2695 if (GST_BUFFER_SIZE (buffer) < min_size)
2696 parse->priv->drain = TRUE;
2698 if (parse->priv->detecting) {
2699 ret = klass->detect (parse, buffer);
2700 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2701 /* If draining we error out, otherwise request a buffer
2703 if (parse->priv->drain) {
2704 gst_buffer_unref (buffer);
2705 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2706 return GST_FLOW_ERROR;
2709 gst_buffer_unref (buffer);
2712 } else if (ret != GST_FLOW_OK) {
2713 gst_buffer_unref (buffer);
2714 GST_ERROR_OBJECT (parse, "detect() returned %s",
2715 gst_flow_get_name (ret));
2719 /* Else handle this buffer normally */
2723 gst_base_parse_frame_update (parse, frame, buffer);
2724 res = klass->check_valid_frame (parse, frame, &fsize, &skip);
2725 gst_buffer_replace (&frame->buffer, NULL);
2727 parse->priv->drain = FALSE;
2728 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2731 parse->priv->drain = FALSE;
2735 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2736 if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2737 /* reverse playback, and no frames found yet, so we are skipping
2738 * the leading part of a fragment, which may form the tail of
2739 * fragment coming later, hopefully subclass skips efficiently ... */
2740 outbuf = gst_buffer_create_sub (buffer, 0, skip);
2741 parse->priv->buffers_pending =
2742 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2745 parse->priv->offset += skip;
2746 if (!parse->priv->discont)
2747 parse->priv->sync_offset = parse->priv->offset;
2748 parse->priv->discont = TRUE;
2749 /* something changed at least; nullify loop check */
2750 if (fsize == G_MAXUINT)
2751 fsize = old_min_size + 64 * 1024;
2754 /* skip == 0 should imply subclass set min_size to need more data;
2755 * we check this shortly */
2756 GST_DEBUG_OBJECT (parse, "finding sync...");
2757 gst_buffer_unref (buffer);
2758 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2763 /* Does the subclass want to skip too? */
2765 parse->priv->offset += skip;
2769 if (fsize + skip <= GST_BUFFER_SIZE (buffer)) {
2770 outbuf = gst_buffer_create_sub (buffer, skip, fsize);
2771 GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
2772 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2773 gst_buffer_unref (buffer);
2775 gst_buffer_unref (buffer);
2776 ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
2777 if (ret != GST_FLOW_OK)
2779 if (GST_BUFFER_SIZE (outbuf) < fsize) {
2780 gst_buffer_unref (outbuf);
2781 ret = GST_FLOW_UNEXPECTED;
2785 parse->priv->offset += fsize;
2787 frame->buffer = outbuf;
2795 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2796 ("min_size evolution %d -> %d; breaking to avoid looping",
2797 old_min_size, min_size));
2798 return GST_FLOW_ERROR;
2802 /* Loop that is used in pull mode to retrieve data from upstream */
2804 gst_base_parse_loop (GstPad * pad)
2806 GstBaseParse *parse;
2807 GstBaseParseClass *klass;
2808 GstFlowReturn ret = GST_FLOW_OK;
2809 GstBaseParseFrame frame;
2811 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2812 klass = GST_BASE_PARSE_GET_CLASS (parse);
2814 /* reverse playback:
2815 * first fragment (closest to stop time) is handled normally below,
2816 * then we pull in fragments going backwards */
2817 if (parse->segment.rate < 0.0) {
2818 /* check if we jumped back to a previous fragment,
2819 * which is a post-first fragment */
2820 if (parse->priv->offset < 0) {
2821 ret = gst_base_parse_handle_previous_fragment (parse);
2826 gst_base_parse_frame_init (&frame);
2827 ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
2828 if (ret != GST_FLOW_OK)
2831 /* This always cleans up frame, even if error occurs */
2832 ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
2834 /* eat expected eos signalling past segment in reverse playback */
2835 if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
2836 parse->segment.last_stop >= parse->segment.stop) {
2837 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2838 /* push what was accumulated during loop run */
2839 gst_base_parse_process_fragment (parse, TRUE);
2840 /* force previous fragment */
2841 parse->priv->offset = -1;
2846 if (ret == GST_FLOW_UNEXPECTED)
2848 else if (ret != GST_FLOW_OK)
2851 gst_object_unref (parse);
2857 ret = GST_FLOW_UNEXPECTED;
2858 GST_DEBUG_OBJECT (parse, "eos");
2863 gboolean push_eos = FALSE;
2865 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2866 gst_flow_get_name (ret));
2867 gst_pad_pause_task (parse->sinkpad);
2869 if (ret == GST_FLOW_UNEXPECTED) {
2870 /* handle end-of-stream/segment */
2871 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2874 if ((stop = parse->segment.stop) == -1)
2875 stop = parse->segment.duration;
2877 GST_DEBUG_OBJECT (parse, "sending segment_done");
2879 gst_element_post_message
2880 (GST_ELEMENT_CAST (parse),
2881 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2882 GST_FORMAT_TIME, stop));
2884 /* If we STILL have zero frames processed, fire an error */
2885 if (parse->priv->framecount == 0) {
2886 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2887 ("No valid frames found before end of stream"), (NULL));
2891 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
2892 /* for fatal errors we post an error message, wrong-state is
2893 * not fatal because it happens due to flushes and only means
2894 * that we should stop now. */
2895 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2896 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2900 /* newsegment before eos */
2901 if (parse->priv->pending_segment) {
2902 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
2903 parse->priv->pending_segment = NULL;
2905 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
2907 gst_object_unref (parse);
2912 gst_base_parse_sink_activate (GstPad * sinkpad)
2914 GstBaseParse *parse;
2915 gboolean result = TRUE;
2917 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2919 GST_DEBUG_OBJECT (parse, "sink activate");
2921 if (gst_pad_check_pull_range (sinkpad)) {
2922 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
2923 result = gst_pad_activate_pull (sinkpad, TRUE);
2925 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
2926 result = gst_pad_activate_push (sinkpad, TRUE);
2929 GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
2930 gst_object_unref (parse);
2935 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
2937 GstBaseParseClass *klass;
2938 gboolean result = TRUE;
2940 GST_DEBUG_OBJECT (parse, "activate %d", active);
2942 klass = GST_BASE_PARSE_GET_CLASS (parse);
2945 if (parse->priv->pad_mode == GST_ACTIVATE_NONE && klass->start)
2946 result = klass->start (parse);
2948 /* If the subclass implements ::detect we want to
2949 * call it for the first buffers now */
2950 parse->priv->detecting = (klass->detect != NULL);
2952 /* We must make sure streaming has finished before resetting things
2953 * and calling the ::stop vfunc */
2954 GST_PAD_STREAM_LOCK (parse->sinkpad);
2955 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
2957 if (parse->priv->pad_mode != GST_ACTIVATE_NONE && klass->stop)
2958 result = klass->stop (parse);
2960 parse->priv->pad_mode = GST_ACTIVATE_NONE;
2962 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
2967 gst_base_parse_sink_activate_push (GstPad * pad, gboolean active)
2969 gboolean result = TRUE;
2970 GstBaseParse *parse;
2972 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2974 GST_DEBUG_OBJECT (parse, "sink activate push %d", active);
2976 result = gst_base_parse_activate (parse, active);
2979 parse->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
2981 GST_DEBUG_OBJECT (parse, "sink activate push return: %d", result);
2983 gst_object_unref (parse);
2988 gst_base_parse_sink_activate_pull (GstPad * sinkpad, gboolean active)
2990 gboolean result = FALSE;
2991 GstBaseParse *parse;
2993 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2995 GST_DEBUG_OBJECT (parse, "activate pull %d", active);
2997 result = gst_base_parse_activate (parse, active);
3001 parse->priv->pending_segment = gst_event_new_new_segment (FALSE,
3002 parse->segment.rate, parse->segment.format,
3003 parse->segment.start, parse->segment.stop, parse->segment.last_stop);
3005 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3008 result &= gst_pad_stop_task (sinkpad);
3013 parse->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
3015 GST_DEBUG_OBJECT (parse, "sink activate pull return: %d", result);
3017 gst_object_unref (parse);
3023 * gst_base_parse_set_duration:
3024 * @parse: #GstBaseParse.
3026 * @duration: duration value.
3027 * @interval: how often to update the duration estimate based on bitrate, or 0.
3029 * Sets the duration of the currently playing media. Subclass can use this
3030 * when it is able to determine duration and/or notices a change in the media
3031 * duration. Alternatively, if @interval is non-zero (default), then stream
3032 * duration is determined based on estimated bitrate, and updated every @interval
3038 gst_base_parse_set_duration (GstBaseParse * parse,
3039 GstFormat fmt, gint64 duration, gint interval)
3041 g_return_if_fail (parse != NULL);
3043 if (parse->priv->upstream_has_duration) {
3044 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3048 if (duration != parse->priv->duration) {
3051 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
3052 gst_element_post_message (GST_ELEMENT (parse), m);
3054 /* TODO: what about duration tag? */
3056 parse->priv->duration = duration;
3057 parse->priv->duration_fmt = fmt;
3058 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3059 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3060 if (interval != 0) {
3061 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3065 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3066 parse->priv->update_interval = interval;
3072 * gst_base_parse_set_average_bitrate:
3073 * @parse: #GstBaseParse.
3074 * @bitrate: average bitrate in bits/second
3076 * Optionally sets the average bitrate detected in media (if non-zero),
3077 * e.g. based on metadata, as it will be posted to the application.
3079 * By default, announced average bitrate is estimated. The average bitrate
3080 * is used to estimate the total duration of the stream and to estimate
3081 * a seek position, if there's no index and the format is syncable
3082 * (see gst_base_parse_set_syncable()).
3087 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3089 parse->priv->bitrate = bitrate;
3090 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3094 * gst_base_parse_set_min_frame_size:
3095 * @parse: #GstBaseParse.
3096 * @min_size: Minimum size of the data that this base class should give to
3099 * Subclass can use this function to tell the base class that it needs to
3100 * give at least #min_size buffers.
3105 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3107 g_return_if_fail (parse != NULL);
3109 parse->priv->min_frame_size = min_size;
3110 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3114 * gst_base_parse_set_frame_rate:
3115 * @parse: the #GstBaseParse to set
3116 * @fps_num: frames per second (numerator).
3117 * @fps_den: frames per second (denominator).
3118 * @lead_in: frames needed before a segment for subsequent decode
3119 * @lead_out: frames needed after a segment
3121 * If frames per second is configured, parser can take care of buffer duration
3122 * and timestamping. When performing segment clipping, or seeking to a specific
3123 * location, a corresponding decoder might need an initial @lead_in and a
3124 * following @lead_out number of frames to ensure the desired segment is
3125 * entirely filled upon decoding.
3130 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3131 guint fps_den, guint lead_in, guint lead_out)
3133 g_return_if_fail (parse != NULL);
3135 parse->priv->fps_num = fps_num;
3136 parse->priv->fps_den = fps_den;
3137 if (!fps_num || !fps_den) {
3138 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3140 fps_num = fps_den = 0;
3141 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3142 parse->priv->lead_in = parse->priv->lead_out = 0;
3143 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3145 parse->priv->frame_duration =
3146 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3147 parse->priv->lead_in = lead_in;
3148 parse->priv->lead_out = lead_out;
3149 parse->priv->lead_in_ts =
3150 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3151 parse->priv->lead_out_ts =
3152 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3153 /* aim for about 1.5s to estimate duration */
3154 if (parse->priv->update_interval < 0) {
3155 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3156 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3157 parse->priv->update_interval);
3160 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3161 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3162 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3163 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3164 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3165 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3169 * gst_base_parse_set_has_timing_info:
3170 * @parse: a #GstBaseParse
3171 * @has_timing: whether frames carry timing information
3173 * Set if frames carry timing information which the subclass can (generally)
3174 * parse and provide. In particular, intrinsic (rather than estimated) time
3175 * can be obtained following a seek.
3180 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3182 parse->priv->has_timing_info = has_timing;
3183 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3187 * gst_base_parse_set_syncable:
3188 * @parse: a #GstBaseParse
3189 * @syncable: set if frame starts can be identified
3191 * Set if frame starts can be identified. This is set by default and
3192 * determines whether seeking based on bitrate averages
3193 * is possible for a format/stream.
3198 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3200 parse->priv->syncable = syncable;
3201 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3205 * gst_base_parse_set_passthrough:
3206 * @parse: a #GstBaseParse
3207 * @passthrough: %TRUE if parser should run in passthrough mode
3209 * Set if the nature of the format or configuration does not allow (much)
3210 * parsing, and the parser should operate in passthrough mode (which only
3211 * applies when operating in push mode). That is, incoming buffers are
3212 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3213 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3214 * so subclass can perform as much or as little is appropriate for
3215 * passthrough semantics in @pre_push_frame.
3220 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3222 parse->priv->passthrough = passthrough;
3223 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3227 * gst_base_parse_set_latency:
3228 * @parse: a #GstBaseParse
3229 * @min_latency: minimum parse latency
3230 * @max_latency: maximum parse latency
3232 * Sets the minimum and maximum (which may likely be equal) latency introduced
3233 * by the parsing process. If there is such a latency, which depends on the
3234 * particular parsing of the format, it typically corresponds to 1 frame duration.
3239 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3240 GstClockTime max_latency)
3242 GST_OBJECT_LOCK (parse);
3243 parse->priv->min_latency = min_latency;
3244 parse->priv->max_latency = max_latency;
3245 GST_OBJECT_UNLOCK (parse);
3246 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3247 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3248 GST_TIME_ARGS (max_latency));
3252 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3253 GstClockTime * duration)
3255 gboolean res = FALSE;
3257 g_return_val_if_fail (duration != NULL, FALSE);
3259 *duration = GST_CLOCK_TIME_NONE;
3260 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3261 GST_LOG_OBJECT (parse, "using provided duration");
3262 *duration = parse->priv->duration;
3264 } else if (parse->priv->duration != -1) {
3265 GST_LOG_OBJECT (parse, "converting provided duration");
3266 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3267 parse->priv->duration, format, (gint64 *) duration);
3268 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3269 GST_LOG_OBJECT (parse, "using estimated duration");
3270 *duration = parse->priv->estimated_duration;
3274 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3275 GST_TIME_ARGS (*duration));
3279 static const GstQueryType *
3280 gst_base_parse_get_querytypes (GstPad * pad)
3282 static const GstQueryType list[] = {
3295 gst_base_parse_query (GstPad * pad, GstQuery * query)
3297 GstBaseParse *parse;
3298 gboolean res = FALSE;
3300 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
3302 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3304 switch (GST_QUERY_TYPE (query)) {
3305 case GST_QUERY_POSITION:
3310 GST_DEBUG_OBJECT (parse, "position query");
3311 gst_query_parse_position (query, &format, NULL);
3313 /* try upstream first */
3314 res = gst_pad_query_default (pad, query);
3316 /* Fall back on interpreting segment */
3317 GST_OBJECT_LOCK (parse);
3318 if (format == GST_FORMAT_BYTES) {
3319 dest_value = parse->priv->offset;
3321 } else if (format == parse->segment.format &&
3322 GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop)) {
3323 dest_value = gst_segment_to_stream_time (&parse->segment,
3324 parse->segment.format, parse->segment.last_stop);
3327 GST_OBJECT_UNLOCK (parse);
3329 /* no precise result, upstream no idea either, then best estimate */
3330 /* priv->offset is updated in both PUSH/PULL modes */
3331 res = gst_base_parse_convert (parse,
3332 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3335 gst_query_set_position (query, format, dest_value);
3339 case GST_QUERY_DURATION:
3342 GstClockTime duration;
3344 GST_DEBUG_OBJECT (parse, "duration query");
3345 gst_query_parse_duration (query, &format, NULL);
3347 /* consult upstream */
3348 res = gst_pad_query_default (pad, query);
3350 /* otherwise best estimate from us */
3352 res = gst_base_parse_get_duration (parse, format, &duration);
3354 gst_query_set_duration (query, format, duration);
3358 case GST_QUERY_SEEKING:
3361 GstClockTime duration = GST_CLOCK_TIME_NONE;
3362 gboolean seekable = FALSE;
3364 GST_DEBUG_OBJECT (parse, "seeking query");
3365 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3367 /* consult upstream */
3368 res = gst_pad_query_default (pad, query);
3370 /* we may be able to help if in TIME */
3371 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3372 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3373 /* already OK if upstream takes care */
3374 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3376 if (!(res && seekable)) {
3377 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3378 || duration == -1) {
3379 /* seekable if we still have a chance to get duration later on */
3381 parse->priv->upstream_seekable && parse->priv->update_interval;
3383 seekable = parse->priv->upstream_seekable;
3384 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3387 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3393 case GST_QUERY_FORMATS:
3394 gst_query_set_formatsv (query, 3, fmtlist);
3397 case GST_QUERY_CONVERT:
3399 GstFormat src_format, dest_format;
3400 gint64 src_value, dest_value;
3402 gst_query_parse_convert (query, &src_format, &src_value,
3403 &dest_format, &dest_value);
3405 res = gst_base_parse_convert (parse, src_format, src_value,
3406 dest_format, &dest_value);
3408 gst_query_set_convert (query, src_format, src_value,
3409 dest_format, dest_value);
3413 case GST_QUERY_LATENCY:
3415 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3417 GstClockTime min_latency, max_latency;
3419 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3420 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3421 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3422 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3424 GST_OBJECT_LOCK (parse);
3425 /* add our latency */
3426 if (min_latency != -1)
3427 min_latency += parse->priv->min_latency;
3428 if (max_latency != -1)
3429 max_latency += parse->priv->max_latency;
3430 GST_OBJECT_UNLOCK (parse);
3432 gst_query_set_latency (query, live, min_latency, max_latency);
3437 res = gst_pad_query_default (pad, query);
3443 /* scans for a cluster start from @pos,
3444 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3445 static GstFlowReturn
3446 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3447 GstClockTime * time, GstClockTime * duration)
3449 GstBaseParseClass *klass;
3451 gboolean orig_drain, orig_discont;
3452 GstFlowReturn ret = GST_FLOW_OK;
3453 GstBuffer *buf = NULL;
3454 GstBaseParseFrame frame;
3456 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3457 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3458 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3460 klass = GST_BASE_PARSE_GET_CLASS (parse);
3462 *time = GST_CLOCK_TIME_NONE;
3463 *duration = GST_CLOCK_TIME_NONE;
3466 orig_offset = parse->priv->offset;
3467 orig_discont = parse->priv->discont;
3468 orig_drain = parse->priv->drain;
3470 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3471 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3473 gst_base_parse_frame_init (&frame);
3475 /* jump elsewhere and locate next frame */
3476 parse->priv->offset = *pos;
3477 ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
3478 if (ret != GST_FLOW_OK)
3482 GST_LOG_OBJECT (parse,
3483 "peek parsing frame at offset %" G_GUINT64_FORMAT
3484 " (%#" G_GINT64_MODIFIER "x) of size %d",
3485 GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
3487 /* get offset first, subclass parsing might dump other stuff in there */
3488 *pos = GST_BUFFER_OFFSET (buf);
3489 ret = klass->parse_frame (parse, &frame);
3492 /* but it should provide proper time */
3493 *time = GST_BUFFER_TIMESTAMP (buf);
3494 *duration = GST_BUFFER_DURATION (buf);
3496 gst_base_parse_frame_free (&frame);
3498 GST_LOG_OBJECT (parse,
3499 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3500 GST_TIME_ARGS (*time), *pos);
3504 parse->priv->offset = orig_offset;
3505 parse->priv->discont = orig_discont;
3506 parse->priv->drain = orig_drain;
3511 /* bisect and scan through file for frame starting before @time,
3512 * returns OK and @time/@offset if found, NONE and/or error otherwise
3513 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3514 static GstFlowReturn
3515 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3518 GstFlowReturn ret = GST_FLOW_OK;
3519 gint64 lpos, hpos, newpos;
3520 GstClockTime time, ltime, htime, newtime, dur;
3521 gboolean cont = TRUE;
3522 const GstClockTime tolerance = TARGET_DIFFERENCE;
3523 const guint chunk = 4 * 1024;
3525 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3526 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3528 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3529 GST_TIME_ARGS (*_time));
3531 /* TODO also make keyframe aware if useful some day */
3546 /* do not know at first */
3548 *_time = GST_CLOCK_TIME_NONE;
3550 /* need initial positions; start and end */
3551 lpos = parse->priv->first_frame_offset;
3552 ltime = parse->priv->first_frame_ts;
3553 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3554 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3555 return GST_FLOW_ERROR;
3557 hpos = parse->priv->upstream_size;
3559 GST_DEBUG_OBJECT (parse,
3560 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3561 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3562 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3564 /* check preconditions are satisfied;
3565 * start and end are needed, except for special case where we scan for
3566 * last frame to determine duration */
3567 if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
3568 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3569 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3573 /* shortcut cases */
3576 } else if (time < ltime + tolerance) {
3580 } else if (time >= htime) {
3586 while (htime > ltime && cont) {
3587 GST_LOG_OBJECT (parse,
3588 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3589 GST_TIME_ARGS (ltime));
3590 GST_LOG_OBJECT (parse,
3591 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3592 GST_TIME_ARGS (htime));
3593 if (G_UNLIKELY (time == G_MAXINT64)) {
3595 } else if (G_LIKELY (hpos > lpos)) {
3597 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3600 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3602 /* we check this case once, but not forever, so break loop */
3607 newpos = CLAMP (newpos, lpos, hpos);
3608 GST_LOG_OBJECT (parse,
3609 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3610 GST_TIME_ARGS (time), newpos);
3612 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3613 if (ret == GST_FLOW_UNEXPECTED) {
3614 /* heuristic HACK */
3615 hpos = MAX (lpos, hpos - chunk);
3617 } else if (ret != GST_FLOW_OK) {
3621 if (newtime == -1 || newpos == -1) {
3622 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3626 if (G_UNLIKELY (time == G_MAXINT64)) {
3629 if (GST_CLOCK_TIME_IS_VALID (dur))
3632 } else if (newtime > time) {
3634 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3636 } else if (newtime + tolerance > time) {
3637 /* close enough undershoot */
3641 } else if (newtime < ltime) {
3642 /* so a position beyond lpos resulted in earlier time than ltime ... */
3643 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3646 /* undershoot too far */
3647 newpos += newpos == lpos ? chunk : 0;
3648 lpos = CLAMP (newpos, lpos, hpos);
3654 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3655 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3660 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3661 gboolean before, GstClockTime * _ts)
3663 gint64 bytes = 0, ts = 0;
3664 GstIndexEntry *entry = NULL;
3666 if (time == GST_CLOCK_TIME_NONE) {
3672 GST_BASE_PARSE_INDEX_LOCK (parse);
3673 if (parse->priv->index) {
3674 /* Let's check if we have an index entry for that time */
3675 entry = gst_index_get_assoc_entry (parse->priv->index,
3676 parse->priv->index_id,
3677 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3678 GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3682 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3683 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3685 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3686 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3687 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3689 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3690 GST_TIME_ARGS (time));
3693 ts = GST_CLOCK_TIME_NONE;
3696 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3705 /* returns TRUE if seek succeeded */
3707 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3712 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3713 gboolean flush, update, res = TRUE, accurate;
3714 gint64 cur, stop, seekpos, seekstop;
3715 GstSegment seeksegment = { 0, };
3716 GstFormat dstformat;
3717 GstClockTime start_ts;
3719 gst_event_parse_seek (event, &rate, &format, &flags,
3720 &cur_type, &cur, &stop_type, &stop);
3722 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3723 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3724 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3725 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3727 /* no negative rates in push mode */
3728 if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
3731 if (cur_type != GST_SEEK_TYPE_SET ||
3732 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3735 /* For any format other than TIME, see if upstream handles
3736 * it directly or fail. For TIME, try upstream, but do it ourselves if
3737 * it fails upstream */
3738 if (format != GST_FORMAT_TIME) {
3739 /* default action delegates to upstream */
3743 gst_event_ref (event);
3744 if ((res = gst_pad_push_event (parse->sinkpad, event))) {
3749 /* get flush flag */
3750 flush = flags & GST_SEEK_FLAG_FLUSH;
3752 /* copy segment, we need this because we still need the old
3753 * segment when we close the current segment. */
3754 memcpy (&seeksegment, &parse->segment, sizeof (GstSegment));
3756 GST_DEBUG_OBJECT (parse, "configuring seek");
3757 gst_segment_set_seek (&seeksegment, rate, format, flags,
3758 cur_type, cur, stop_type, stop, &update);
3760 /* accurate seeking implies seek tables are used to obtain position,
3761 * and the requested segment is maintained exactly, not adjusted any way */
3762 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3764 /* maybe we can be accurate for (almost) free */
3765 gst_base_parse_find_offset (parse, seeksegment.last_stop, TRUE, &start_ts);
3766 if (seeksegment.last_stop <= start_ts + TARGET_DIFFERENCE) {
3767 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3771 GstClockTime startpos = seeksegment.last_stop;
3773 /* accurate requested, so ... seek a bit before target */
3774 if (startpos < parse->priv->lead_in_ts)
3777 startpos -= parse->priv->lead_in_ts;
3778 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3779 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3782 start_ts = seeksegment.last_stop;
3783 dstformat = GST_FORMAT_BYTES;
3784 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
3785 &dstformat, &seekpos))
3786 goto convert_failed;
3787 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3788 &dstformat, &seekstop))
3789 goto convert_failed;
3792 GST_DEBUG_OBJECT (parse,
3793 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3795 GST_DEBUG_OBJECT (parse,
3796 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3797 seeksegment.stop, seekstop);
3799 if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
3802 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3805 if (parse->srcpad) {
3806 GST_DEBUG_OBJECT (parse, "sending flush start");
3807 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3808 /* unlock upstream pull_range */
3809 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3812 gst_pad_pause_task (parse->sinkpad);
3815 /* we should now be able to grab the streaming thread because we stopped it
3816 * with the above flush/pause code */
3817 GST_PAD_STREAM_LOCK (parse->sinkpad);
3819 /* save current position */
3820 last_stop = parse->segment.last_stop;
3821 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3824 /* now commit to new position */
3826 /* prepare for streaming again */
3828 GST_DEBUG_OBJECT (parse, "sending flush stop");
3829 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
3830 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
3831 gst_base_parse_clear_queues (parse);
3833 if (parse->priv->close_segment)
3834 gst_event_unref (parse->priv->close_segment);
3836 parse->priv->close_segment = gst_event_new_new_segment (TRUE,
3837 parse->segment.rate, parse->segment.format,
3838 parse->segment.accum, parse->segment.last_stop, parse->segment.accum);
3840 /* keep track of our last_stop */
3841 seeksegment.accum = parse->segment.last_stop;
3843 GST_DEBUG_OBJECT (parse, "Created close seg format %d, "
3844 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3845 ", pos = %" GST_TIME_FORMAT, format,
3846 GST_TIME_ARGS (parse->segment.accum),
3847 GST_TIME_ARGS (parse->segment.last_stop),
3848 GST_TIME_ARGS (parse->segment.accum));
3851 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3853 /* store the newsegment event so it can be sent from the streaming thread. */
3854 if (parse->priv->pending_segment)
3855 gst_event_unref (parse->priv->pending_segment);
3857 /* This will be sent later in _loop() */
3858 parse->priv->pending_segment =
3859 gst_event_new_new_segment (FALSE, parse->segment.rate,
3860 parse->segment.format, parse->segment.start,
3861 parse->segment.stop, parse->segment.start);
3863 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3864 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3865 ", pos = %" GST_TIME_FORMAT, format,
3866 GST_TIME_ARGS (parse->segment.start),
3867 GST_TIME_ARGS (parse->segment.stop),
3868 GST_TIME_ARGS (parse->segment.start));
3870 /* one last chance in pull mode to stay accurate;
3871 * maybe scan and subclass can find where to go */
3874 GstClockTime ts = seeksegment.last_stop;
3876 gst_base_parse_locate_time (parse, &ts, &scanpos);
3880 /* running collected index now consists of several intervals,
3881 * so optimized check no longer possible */
3882 parse->priv->index_last_valid = FALSE;
3883 parse->priv->index_last_offset = 0;
3884 parse->priv->index_last_ts = 0;
3888 /* mark discont if we are going to stream from another position. */
3889 if (seekpos != parse->priv->offset) {
3890 GST_DEBUG_OBJECT (parse,
3891 "mark DISCONT, we did a seek to another position");
3892 parse->priv->offset = seekpos;
3893 parse->priv->last_offset = seekpos;
3894 parse->priv->seen_keyframe = FALSE;
3895 parse->priv->discont = TRUE;
3896 parse->priv->next_ts = start_ts;
3897 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3898 parse->priv->sync_offset = seekpos;
3899 parse->priv->exact_position = accurate;
3902 /* Start streaming thread if paused */
3903 gst_pad_start_task (parse->sinkpad,
3904 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3906 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3911 GstEvent *new_event;
3912 GstBaseParseSeek *seek;
3913 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
3915 /* The only thing we need to do in PUSH-mode is to send the
3916 seek event (in bytes) to upstream. Segment / flush handling happens
3917 in corresponding src event handlers */
3918 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3919 if (seekstop >= 0 && seekpos <= seekpos)
3921 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
3922 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3924 /* store segment info so its precise details can be reconstructed when
3925 * receiving newsegment;
3926 * this matters for all details when accurate seeking,
3927 * is most useful to preserve NONE stop time otherwise */
3928 seek = g_new0 (GstBaseParseSeek, 1);
3929 seek->segment = seeksegment;
3930 seek->accurate = accurate;
3931 seek->offset = seekpos;
3932 seek->start_ts = start_ts;
3933 GST_OBJECT_LOCK (parse);
3934 /* less optimal, but preserves order */
3935 parse->priv->pending_seeks =
3936 g_slist_append (parse->priv->pending_seeks, seek);
3937 GST_OBJECT_UNLOCK (parse);
3939 res = gst_pad_push_event (parse->sinkpad, new_event);
3942 GST_OBJECT_LOCK (parse);
3943 parse->priv->pending_seeks =
3944 g_slist_remove (parse->priv->pending_seeks, seek);
3945 GST_OBJECT_UNLOCK (parse);
3951 /* handled event is ours to free */
3953 gst_event_unref (event);
3959 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
3965 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
3971 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
3977 /* Checks if bitrates are available from upstream tags so that we don't
3978 * override them later
3981 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
3983 GstTagList *taglist = NULL;
3986 gst_event_parse_tag (event, &taglist);
3988 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
3989 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
3990 parse->priv->post_min_bitrate = FALSE;
3992 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
3993 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
3994 parse->priv->post_avg_bitrate = FALSE;
3996 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
3997 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
3998 parse->priv->post_max_bitrate = FALSE;
4003 gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
4005 GstBaseParse *parse;
4006 GstBaseParseClass *klass;
4007 gboolean res = TRUE;
4009 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
4010 klass = GST_BASE_PARSE_GET_CLASS (parse);
4012 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
4014 if (klass->set_sink_caps)
4015 res = klass->set_sink_caps (parse, caps);
4021 gst_base_parse_sink_getcaps (GstPad * pad)
4023 GstBaseParse *parse;
4024 GstBaseParseClass *klass;
4027 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
4028 klass = GST_BASE_PARSE_GET_CLASS (parse);
4029 g_assert (pad == GST_BASE_PARSE_SINK_PAD (parse));
4031 if (klass->get_sink_caps)
4032 caps = klass->get_sink_caps (parse);
4034 caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
4035 gst_object_unref (parse);
4037 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT, caps);
4043 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4045 GstBaseParse *parse = GST_BASE_PARSE (element);
4047 GST_BASE_PARSE_INDEX_LOCK (parse);
4048 if (parse->priv->index)
4049 gst_object_unref (parse->priv->index);
4051 parse->priv->index = gst_object_ref (index);
4052 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4053 &parse->priv->index_id);
4054 parse->priv->own_index = FALSE;
4056 parse->priv->index = NULL;
4058 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4062 gst_base_parse_get_index (GstElement * element)
4064 GstBaseParse *parse = GST_BASE_PARSE (element);
4065 GstIndex *result = NULL;
4067 GST_BASE_PARSE_INDEX_LOCK (parse);
4068 if (parse->priv->index)
4069 result = gst_object_ref (parse->priv->index);
4070 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4075 static GstStateChangeReturn
4076 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4078 GstBaseParse *parse;
4079 GstStateChangeReturn result;
4081 parse = GST_BASE_PARSE (element);
4083 switch (transition) {
4084 case GST_STATE_CHANGE_READY_TO_PAUSED:
4085 /* If this is our own index destroy it as the
4086 * old entries might be wrong for the new stream */
4087 GST_BASE_PARSE_INDEX_LOCK (parse);
4088 if (parse->priv->own_index) {
4089 gst_object_unref (parse->priv->index);
4090 parse->priv->index = NULL;
4091 parse->priv->own_index = FALSE;
4094 /* If no index was created, generate one */
4095 if (G_UNLIKELY (!parse->priv->index)) {
4096 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4098 parse->priv->index = gst_index_factory_make ("memindex");
4099 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4100 &parse->priv->index_id);
4101 parse->priv->own_index = TRUE;
4103 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4109 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4111 switch (transition) {
4112 case GST_STATE_CHANGE_PAUSED_TO_READY:
4113 gst_base_parse_reset (parse);