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 calls @start to inform subclass that data processing is
57 * GstBaseParse class calls @set_sink_caps to inform the subclass about
58 * incoming sinkpad caps. Subclass could already set the srcpad caps
59 * accordingly, but this might be delayed until calling
60 * gst_base_parse_finish_frame() with a non-queued frame.
63 * At least at this point subclass needs to tell the GstBaseParse class
64 * how big data chunks it wants to receive (min_frame_size). It can do
65 * this with gst_base_parse_set_min_frame_size().
68 * GstBaseParse class sets up appropriate data passing mode (pull/push)
69 * and starts to process the data.
75 * <title>Parsing phase</title>
77 * GstBaseParse gathers at least min_frame_size bytes of data either
78 * by pulling it from upstream or collecting buffers in an internal
82 * A buffer of (at least) min_frame_size bytes is passed to subclass with
83 * @handle_frame. Subclass checks the contents and can optionally
84 * return GST_FLOW_OK along with an amount of data to be skipped to find
85 * a valid frame (which will result in a subsequent DISCONT).
86 * If, otherwise, the buffer does not hold a complete frame,
87 * @handle_frame can merely return and will be called again when additional
88 * data is available. In push mode this amounts to an
89 * additional input buffer (thus minimal additional latency), in pull mode
90 * this amounts to some arbitrary reasonable buffer size increase.
91 * Of course, gst_base_parse_set_min_size() could also be used if a very
92 * specific known amount of additional data is required.
93 * If, however, the buffer holds a complete valid frame, it can pass
94 * the size of this frame to gst_base_parse_finish_frame().
95 * If acting as a converter, it can also merely indicate consumed input data
96 * while simultaneously providing custom output data.
97 * Note that baseclass performs some processing (such as tracking
98 * overall consumed data rate versus duration) for each finished frame,
99 * but other state is only updated upon each call to @handle_frame
100 * (such as tracking upstream input timestamp).
102 * Subclass is also responsible for setting the buffer metadata
103 * (e.g. buffer timestamp and duration, or keyframe if applicable).
104 * (although the latter can also be done by GstBaseParse if it is
105 * appropriately configured, see below). Frame is provided with
106 * timestamp derived from upstream (as much as generally possible),
107 * duration obtained from configuration (see below), and offset
108 * if meaningful (in pull mode).
110 * Note that @check_valid_frame might receive any small
111 * amount of input data when leftover data is being drained (e.g. at EOS).
114 * As part of finish frame processing,
115 * just prior to actually pushing the buffer in question,
116 * it is passed to @pre_push_frame which gives subclass yet one
117 * last chance to examine buffer metadata, or to send some custom (tag)
118 * events, or to perform custom (segment) filtering.
121 * During the parsing process GstBaseParseClass will handle both srcpad
122 * and sinkpad events. They will be passed to subclass if @event or
123 * @src_event callbacks have been provided.
128 * <itemizedlist><title>Shutdown phase</title>
130 * GstBaseParse class calls @stop to inform the subclass that data
131 * parsing will be stopped.
137 * Subclass is responsible for providing pad template caps for
138 * source and sink pads. The pads need to be named "sink" and "src". It also
139 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
140 * when base class calls subclass' @set_sink_caps function).
142 * This base class uses #GST_FORMAT_DEFAULT as a meaning of frames. So,
143 * subclass conversion routine needs to know that conversion from
144 * #GST_FORMAT_TIME to #GST_FORMAT_DEFAULT must return the
145 * frame number that can be found from the given byte position.
147 * GstBaseParse uses subclasses conversion methods also for seeking (or
148 * otherwise uses its own default one, see also below).
150 * Subclass @start and @stop functions will be called to inform the beginning
151 * and end of data processing.
153 * Things that subclass need to take care of:
155 * <listitem><para>Provide pad templates</para></listitem>
157 * Fixate the source pad caps when appropriate
160 * Inform base class how big data chunks should be retrieved. This is
161 * done with gst_base_parse_set_min_frame_size() function.
164 * Examine data chunks passed to subclass with @handle_frame and pass
165 * proper frame(s) to gst_base_parse_finish_frame(), and setting src pad
166 * caps and timestamps on frame.
168 * <listitem><para>Provide conversion functions</para></listitem>
170 * Update the duration information with gst_base_parse_set_duration()
173 * Optionally passthrough using gst_base_parse_set_passthrough()
176 * Configure various baseparse parameters using
177 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
178 * and gst_base_parse_set_frame_rate().
181 * In particular, if subclass is unable to determine a duration, but
182 * parsing (or specs) yields a frames per seconds rate, then this can be
183 * provided to GstBaseParse to enable it to cater for
184 * buffer time metadata (which will be taken from upstream as much as
185 * possible). Internally keeping track of frame durations and respective
186 * sizes that have been pushed provides GstBaseParse with an estimated
187 * bitrate. A default @convert (used if not overriden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
222 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
223 #define GST_CAT_DEFAULT gst_base_parse_debug
225 /* Supported formats */
226 static const GstFormat fmtlist[] = {
233 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
234 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
236 struct _GstBaseParsePrivate
243 GstFormat duration_fmt;
244 gint64 estimated_duration;
245 gint64 estimated_drift;
247 guint min_frame_size;
248 gboolean passthrough;
250 gboolean has_timing_info;
251 guint fps_num, fps_den;
252 gint update_interval;
254 guint lead_in, lead_out;
255 GstClockTime lead_in_ts, lead_out_ts;
256 GstClockTime min_latency, max_latency;
264 GstClockTime next_ts;
265 GstClockTime prev_ts;
266 GstClockTime frame_duration;
267 gboolean seen_keyframe;
273 guint64 data_bytecount;
274 guint64 acc_duration;
275 GstClockTime first_frame_ts;
276 gint64 first_frame_offset;
278 gboolean post_min_bitrate;
279 gboolean post_avg_bitrate;
280 gboolean post_max_bitrate;
284 guint posted_avg_bitrate;
286 GList *pending_events;
288 /* frames/buffers that are queued and ready to go on OK */
289 GQueue queued_frames;
293 /* index entry storage, either ours or provided */
299 /* seek table entries only maintained if upstream is BYTE seekable */
300 gboolean upstream_seekable;
301 gboolean upstream_has_duration;
302 gint64 upstream_size;
303 /* minimum distance between two index entries */
304 GstClockTimeDiff idx_interval;
305 /* ts and offset of last entry added */
306 GstClockTime index_last_ts;
307 gint64 index_last_offset;
308 gboolean index_last_valid;
310 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
311 gboolean exact_position;
312 /* seek events are temporarily kept to match them with newsegments */
313 GSList *pending_seeks;
315 /* reverse playback */
316 GSList *buffers_pending;
317 GSList *buffers_head;
318 GSList *buffers_queued;
319 GSList *buffers_send;
320 GstClockTime last_ts;
323 /* Newsegment event to be sent after SEEK */
324 GstEvent *pending_segment;
326 /* frame previously passed to subclass (might be re-used) */
327 GstBaseParseFrame *prev_frame;
328 /* offset corresponding to above frame */
330 /* whether we are merely scanning for a frame */
332 /* ... and resulting frame, if any */
333 GstBaseParseFrame *scanned_frame;
335 /* TRUE if we're still detecting the format, i.e.
336 * if ::detect() is still called for future buffers */
338 GList *detect_buffers;
339 guint detect_buffers_size;
342 typedef struct _GstBaseParseSeek
347 GstClockTime start_ts;
350 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
351 g_mutex_lock (&parse->priv->index_lock);
352 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
353 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);
394 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
395 static GstIndex *gst_base_parse_get_index (GstElement * element);
398 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
400 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
401 GstObject * parent, GstPadMode mode, gboolean active);
402 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
404 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
406 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
408 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
411 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
413 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
416 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
418 static void gst_base_parse_loop (GstPad * pad);
420 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
421 GstBaseParseFrame * frame);
423 static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
426 static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
429 static void gst_base_parse_drain (GstBaseParse * parse);
431 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
432 gboolean post_min, gboolean post_avg, gboolean post_max);
434 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
435 GstClockTime time, gboolean before, GstClockTime * _ts);
436 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
437 GstClockTime * _time, gint64 * _offset);
439 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
440 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
443 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
445 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
448 gst_base_parse_clear_queues (GstBaseParse * parse)
450 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
451 g_slist_free (parse->priv->buffers_queued);
452 parse->priv->buffers_queued = NULL;
453 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
455 g_slist_free (parse->priv->buffers_pending);
456 parse->priv->buffers_pending = NULL;
457 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
458 g_slist_free (parse->priv->buffers_head);
459 parse->priv->buffers_head = NULL;
460 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
461 g_slist_free (parse->priv->buffers_send);
462 parse->priv->buffers_send = NULL;
464 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
465 g_list_free (parse->priv->detect_buffers);
466 parse->priv->detect_buffers = NULL;
467 parse->priv->detect_buffers_size = 0;
469 g_queue_foreach (&parse->priv->queued_frames,
470 (GFunc) gst_base_parse_frame_free, NULL);
471 g_queue_clear (&parse->priv->queued_frames);
475 gst_base_parse_finalize (GObject * object)
477 GstBaseParse *parse = GST_BASE_PARSE (object);
480 g_object_unref (parse->priv->adapter);
482 if (parse->priv->pending_segment) {
483 p_ev = &parse->priv->pending_segment;
484 gst_event_replace (p_ev, NULL);
487 if (parse->priv->cache) {
488 gst_buffer_unref (parse->priv->cache);
489 parse->priv->cache = NULL;
492 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
494 g_list_free (parse->priv->pending_events);
495 parse->priv->pending_events = NULL;
497 if (parse->priv->index) {
498 gst_object_unref (parse->priv->index);
499 parse->priv->index = NULL;
501 g_mutex_clear (&parse->priv->index_lock);
503 gst_base_parse_clear_queues (parse);
505 G_OBJECT_CLASS (parent_class)->finalize (object);
509 gst_base_parse_class_init (GstBaseParseClass * klass)
511 GObjectClass *gobject_class;
512 GstElementClass *gstelement_class;
514 gobject_class = G_OBJECT_CLASS (klass);
515 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
516 parent_class = g_type_class_peek_parent (klass);
517 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
519 gstelement_class = (GstElementClass *) klass;
520 gstelement_class->change_state =
521 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
524 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
525 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
528 /* Default handlers */
529 klass->src_event = gst_base_parse_src_eventfunc;
530 klass->convert = gst_base_parse_convert_default;
532 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
533 "baseparse element");
537 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
539 GstPadTemplate *pad_template;
541 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
543 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
546 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
547 g_return_if_fail (pad_template != NULL);
548 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
549 gst_pad_set_event_function (parse->sinkpad,
550 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
551 gst_pad_set_query_function (parse->sinkpad,
552 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
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_activatemode_function (parse->sinkpad,
558 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
559 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
561 GST_DEBUG_OBJECT (parse, "sinkpad created");
564 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
565 g_return_if_fail (pad_template != NULL);
566 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
567 gst_pad_set_event_function (parse->srcpad,
568 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
569 gst_pad_set_query_function (parse->srcpad,
570 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
571 gst_pad_use_fixed_caps (parse->srcpad);
572 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
573 GST_DEBUG_OBJECT (parse, "src created");
575 g_queue_init (&parse->priv->queued_frames);
577 parse->priv->adapter = gst_adapter_new ();
579 parse->priv->pad_mode = GST_PAD_MODE_NONE;
581 g_mutex_init (&parse->priv->index_lock);
584 gst_base_parse_reset (parse);
585 GST_DEBUG_OBJECT (parse, "init ok");
587 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
590 static GstBaseParseFrame *
591 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
593 GstBaseParseFrame *copy;
595 copy = g_slice_dup (GstBaseParseFrame, frame);
596 copy->buffer = gst_buffer_ref (frame->buffer);
597 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
599 GST_TRACE ("copied frame %p -> %p", frame, copy);
605 gst_base_parse_frame_free (GstBaseParseFrame * frame)
607 GST_TRACE ("freeing frame %p", frame);
610 gst_buffer_unref (frame->buffer);
611 frame->buffer = NULL;
614 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
615 g_slice_free (GstBaseParseFrame, frame);
617 memset (frame, 0, sizeof (*frame));
621 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
622 (GBoxedCopyFunc) gst_base_parse_frame_copy,
623 (GBoxedFreeFunc) gst_base_parse_frame_free);
626 * gst_base_parse_frame_init:
627 * @frame: #GstBaseParseFrame.
629 * Sets a #GstBaseParseFrame to initial state. Currently this means
630 * all public fields are zero-ed and a private flag is set to make
631 * sure gst_base_parse_frame_free() only frees the contents but not
632 * the actual frame. Use this function to initialise a #GstBaseParseFrame
633 * allocated on the stack.
638 gst_base_parse_frame_init (GstBaseParseFrame * frame)
640 memset (frame, 0, sizeof (GstBaseParseFrame));
641 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
642 GST_TRACE ("inited frame %p", frame);
646 * gst_base_parse_frame_new:
647 * @buffer: (transfer none): a #GstBuffer
649 * @overhead: number of bytes in this frame which should be counted as
650 * metadata overhead, ie. not used to calculate the average bitrate.
651 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
653 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
654 * elements written in C should usually allocate the frame on the stack and
655 * then use gst_base_parse_frame_init() to initialise it.
657 * Returns: a newly-allocated #GstBaseParseFrame. Free with
658 * gst_base_parse_frame_free() when no longer needed, unless you gave
659 * away ownership to gst_base_parse_push_frame().
664 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
667 GstBaseParseFrame *frame;
669 frame = g_slice_new0 (GstBaseParseFrame);
670 frame->buffer = gst_buffer_ref (buffer);
672 GST_TRACE ("created frame %p", frame);
677 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
680 gst_buffer_replace (&frame->buffer, buf);
684 /* set flags one by one for clarity */
685 if (G_UNLIKELY (parse->priv->drain))
686 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
688 /* losing sync is pretty much a discont (and vice versa), no ? */
689 if (G_UNLIKELY (parse->priv->discont))
690 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
694 gst_base_parse_reset (GstBaseParse * parse)
696 GST_OBJECT_LOCK (parse);
697 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
698 parse->priv->duration = -1;
699 parse->priv->min_frame_size = 1;
700 parse->priv->discont = TRUE;
701 parse->priv->flushing = FALSE;
702 parse->priv->offset = 0;
703 parse->priv->sync_offset = 0;
704 parse->priv->update_interval = -1;
705 parse->priv->fps_num = parse->priv->fps_den = 0;
706 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
707 parse->priv->lead_in = parse->priv->lead_out = 0;
708 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
709 parse->priv->bitrate = 0;
710 parse->priv->framecount = 0;
711 parse->priv->bytecount = 0;
712 parse->priv->acc_duration = 0;
713 parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
714 parse->priv->first_frame_offset = -1;
715 parse->priv->estimated_duration = -1;
716 parse->priv->estimated_drift = 0;
717 parse->priv->next_ts = 0;
718 parse->priv->syncable = TRUE;
719 parse->priv->passthrough = FALSE;
720 parse->priv->has_timing_info = FALSE;
721 parse->priv->post_min_bitrate = TRUE;
722 parse->priv->post_avg_bitrate = TRUE;
723 parse->priv->post_max_bitrate = TRUE;
724 parse->priv->min_bitrate = G_MAXUINT;
725 parse->priv->max_bitrate = 0;
726 parse->priv->avg_bitrate = 0;
727 parse->priv->posted_avg_bitrate = 0;
729 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
730 parse->priv->index_last_offset = -1;
731 parse->priv->index_last_valid = TRUE;
732 parse->priv->upstream_seekable = FALSE;
733 parse->priv->upstream_size = 0;
734 parse->priv->upstream_has_duration = FALSE;
735 parse->priv->idx_interval = 0;
736 parse->priv->exact_position = TRUE;
737 parse->priv->seen_keyframe = FALSE;
739 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
740 parse->priv->last_offset = 0;
742 if (parse->priv->pending_segment) {
743 gst_event_unref (parse->priv->pending_segment);
744 parse->priv->pending_segment = NULL;
747 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
749 g_list_free (parse->priv->pending_events);
750 parse->priv->pending_events = NULL;
752 if (parse->priv->cache) {
753 gst_buffer_unref (parse->priv->cache);
754 parse->priv->cache = NULL;
757 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
758 g_slist_free (parse->priv->pending_seeks);
759 parse->priv->pending_seeks = NULL;
761 if (parse->priv->adapter)
762 gst_adapter_clear (parse->priv->adapter);
764 /* we know it is not alloc'ed, but maybe other stuff to free, some day ... */
765 if (parse->priv->prev_frame) {
766 gst_base_parse_frame_free (parse->priv->prev_frame);
767 parse->priv->prev_frame = NULL;
770 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
771 g_list_free (parse->priv->detect_buffers);
772 parse->priv->detect_buffers = NULL;
773 parse->priv->detect_buffers_size = 0;
774 GST_OBJECT_UNLOCK (parse);
777 /* gst_base_parse_parse_frame:
778 * @parse: #GstBaseParse.
779 * @buffer: #GstBuffer.
781 * Default callback for parse_frame.
784 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
786 GstBuffer *buffer = frame->buffer;
788 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
789 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
790 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
792 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
793 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
794 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
799 /* gst_base_parse_convert:
800 * @parse: #GstBaseParse.
801 * @src_format: #GstFormat describing the source format.
802 * @src_value: Source value to be converted.
803 * @dest_format: #GstFormat defining the converted format.
804 * @dest_value: Pointer where the conversion result will be put.
806 * Converts using configured "convert" vmethod in #GstBaseParse class.
808 * Returns: TRUE if conversion was successful.
811 gst_base_parse_convert (GstBaseParse * parse,
812 GstFormat src_format,
813 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
815 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
818 g_return_val_if_fail (dest_value != NULL, FALSE);
823 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
825 #ifndef GST_DISABLE_GST_DEBUG
828 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
829 GST_LOG_OBJECT (parse,
830 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
831 GST_TIME_ARGS (src_value), *dest_value);
832 } else if (dest_format == GST_FORMAT_TIME &&
833 src_format == GST_FORMAT_BYTES) {
834 GST_LOG_OBJECT (parse,
835 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
836 src_value, GST_TIME_ARGS (*dest_value));
838 GST_LOG_OBJECT (parse,
839 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
840 GST_STR_NULL (gst_format_get_name (src_format)),
841 GST_STR_NULL (gst_format_get_name (dest_format)),
842 src_value, *dest_value);
845 GST_DEBUG_OBJECT (parse, "conversion failed");
853 /* gst_base_parse_sink_event:
854 * @pad: #GstPad that received the event.
855 * @event: #GstEvent to be handled.
857 * Handler for sink pad events.
859 * Returns: TRUE if the event was handled.
862 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
865 GstBaseParseClass *bclass;
866 gboolean handled = FALSE;
869 parse = GST_BASE_PARSE (parent);
870 bclass = GST_BASE_PARSE_GET_CLASS (parse);
872 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
873 GST_EVENT_TYPE_NAME (event));
875 /* Cache all events except EOS, SEGMENT and FLUSH_STOP if we have a
877 if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
878 && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT
879 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
880 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP
881 && GST_EVENT_TYPE (event) != GST_EVENT_CAPS) {
883 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
884 /* See if any bitrate tags were posted */
885 gst_base_parse_handle_tag (parse, event);
887 parse->priv->pending_events =
888 g_list_append (parse->priv->pending_events, event);
892 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
893 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
894 /* We've not posted bitrate tags yet - do so now */
895 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
898 handled = bclass->event (parse, event);
901 handled = gst_base_parse_sink_eventfunc (parse, event);
904 ret = gst_pad_event_default (pad, parent, event);
907 GST_DEBUG_OBJECT (parse, "event handled");
913 /* gst_base_parse_sink_eventfunc:
914 * @parse: #GstBaseParse.
915 * @event: #GstEvent to be handled.
917 * Element-level event handler function.
919 * The event will be unreffed only if it has been handled and this
920 * function returns %TRUE
922 * Returns: %TRUE if the event was handled and not need forwarding.
925 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
927 gboolean handled = FALSE;
930 switch (GST_EVENT_TYPE (event)) {
934 GstBaseParseClass *klass;
936 klass = GST_BASE_PARSE_GET_CLASS (parse);
938 gst_event_parse_caps (event, &caps);
939 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
941 if (klass->set_sink_caps)
942 klass->set_sink_caps (parse, caps);
944 /* will send our own caps downstream */
945 gst_event_unref (event);
949 case GST_EVENT_SEGMENT:
951 const GstSegment *in_segment;
952 GstSegment out_segment;
953 gint64 offset = 0, next_ts;
956 gdouble rate, applied_rate;
958 gint64 start, stop, pos, next_ts;
962 gst_event_parse_segment (event, &in_segment);
963 gst_segment_init (&out_segment, GST_FORMAT_TIME);
965 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
967 if (in_segment->format == GST_FORMAT_BYTES) {
968 GstBaseParseSeek *seek = NULL;
971 /* stop time is allowed to be open-ended, but not start & pos */
972 offset = in_segment->time;
974 GST_OBJECT_LOCK (parse);
975 for (node = parse->priv->pending_seeks; node; node = node->next) {
976 GstBaseParseSeek *tmp = node->data;
978 if (tmp->offset == offset) {
983 parse->priv->pending_seeks =
984 g_slist_remove (parse->priv->pending_seeks, seek);
985 GST_OBJECT_UNLOCK (parse);
988 GST_DEBUG_OBJECT (parse,
989 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
990 seek->accurate ? " accurate" : "", &seek->segment);
992 out_segment.start = seek->segment.start;
993 out_segment.stop = seek->segment.stop;
994 out_segment.time = seek->segment.start;
996 next_ts = seek->start_ts;
997 parse->priv->exact_position = seek->accurate;
1000 /* best attempt convert */
1001 /* as these are only estimates, stop is kept open-ended to avoid
1002 * premature cutting */
1003 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1004 GST_FORMAT_TIME, (gint64 *) & next_ts);
1006 out_segment.start = next_ts;
1007 out_segment.stop = GST_CLOCK_TIME_NONE;
1008 out_segment.time = next_ts;
1010 parse->priv->exact_position = (in_segment->start == 0);
1013 gst_event_unref (event);
1015 event = gst_event_new_segment (&out_segment);
1017 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1018 GST_SEGMENT_FORMAT, in_segment);
1020 } else if (in_segment->format != GST_FORMAT_TIME) {
1021 /* Unknown incoming segment format. Output a default open-ended
1023 gst_event_unref (event);
1025 out_segment.start = 0;
1026 out_segment.stop = GST_CLOCK_TIME_NONE;
1027 out_segment.time = 0;
1029 event = gst_event_new_segment (&out_segment);
1033 /* not considered BYTE seekable if it is talking to us in TIME,
1034 * whatever else it might claim */
1035 parse->priv->upstream_seekable = FALSE;
1036 next_ts = in_segment->start;
1039 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1042 gst_segment_set_newsegment (&parse->segment, update, rate,
1043 applied_rate, format, start, stop, start);
1046 /* save the segment for later, right before we push a new buffer so that
1047 * the caps are fixed and the next linked element can receive
1049 eventp = &parse->priv->pending_segment;
1050 gst_event_replace (eventp, event);
1051 gst_event_unref (event);
1054 /* but finish the current segment */
1055 GST_DEBUG_OBJECT (parse, "draining current segment");
1056 if (in_segment->rate > 0.0)
1057 gst_base_parse_drain (parse);
1059 gst_base_parse_finish_fragment (parse, FALSE);
1060 gst_adapter_clear (parse->priv->adapter);
1062 parse->priv->offset = offset;
1063 parse->priv->sync_offset = offset;
1064 parse->priv->next_ts = next_ts;
1065 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1066 parse->priv->discont = TRUE;
1067 parse->priv->seen_keyframe = FALSE;
1071 case GST_EVENT_FLUSH_START:
1072 parse->priv->flushing = TRUE;
1073 handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
1075 gst_event_unref (event);
1076 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1077 GST_PAD_STREAM_LOCK (parse->srcpad);
1078 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1082 case GST_EVENT_FLUSH_STOP:
1083 gst_adapter_clear (parse->priv->adapter);
1084 gst_base_parse_clear_queues (parse);
1085 parse->priv->flushing = FALSE;
1086 parse->priv->discont = TRUE;
1087 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1088 if (parse->priv->prev_frame) {
1089 gst_base_parse_frame_free (parse->priv->prev_frame);
1090 parse->priv->prev_frame = NULL;
1095 if (parse->segment.rate > 0.0)
1096 gst_base_parse_drain (parse);
1098 gst_base_parse_finish_fragment (parse, TRUE);
1100 /* If we STILL have zero frames processed, fire an error */
1101 if (parse->priv->framecount == 0) {
1102 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1103 ("No valid frames found before end of stream"), (NULL));
1105 /* newsegment before eos */
1106 if (parse->priv->pending_segment) {
1107 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1108 parse->priv->pending_segment = NULL;
1120 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1122 GstBaseParse *parse;
1123 GstBaseParseClass *bclass;
1126 parse = GST_BASE_PARSE (parent);
1127 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1129 switch (GST_QUERY_TYPE (query)) {
1130 case GST_QUERY_CAPS:
1132 if (bclass->get_sink_caps) {
1133 GstCaps *caps, *filter;
1135 gst_query_parse_caps (query, &filter);
1136 caps = bclass->get_sink_caps (parse, filter);
1137 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1139 gst_query_set_caps_result (query, caps);
1140 gst_caps_unref (caps);
1144 GstCaps *caps, *template_caps, *filter;
1146 gst_query_parse_caps (query, &filter);
1147 template_caps = gst_pad_get_pad_template_caps (pad);
1148 if (filter != NULL) {
1150 gst_caps_intersect_full (filter, template_caps,
1151 GST_CAPS_INTERSECT_FIRST);
1152 gst_caps_unref (template_caps);
1154 caps = template_caps;
1156 gst_query_set_caps_result (query, caps);
1157 gst_caps_unref (caps);
1165 res = gst_pad_query_default (pad, parent, query);
1174 /* gst_base_parse_src_event:
1175 * @pad: #GstPad that received the event.
1176 * @event: #GstEvent that was received.
1178 * Handler for source pad events.
1180 * Returns: TRUE if the event was handled.
1183 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1185 GstBaseParse *parse;
1186 GstBaseParseClass *bclass;
1187 gboolean handled = FALSE;
1188 gboolean ret = TRUE;
1190 parse = GST_BASE_PARSE (parent);
1191 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1193 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1194 GST_EVENT_TYPE_NAME (event));
1196 if (bclass->src_event)
1197 handled = bclass->src_event (parse, event);
1200 ret = gst_pad_event_default (pad, parent, event);
1206 gst_base_parse_is_seekable (GstBaseParse * parse)
1208 /* FIXME: could do more here, e.g. check index or just send data from 0
1209 * in pull mode and let decoder/sink clip */
1210 return parse->priv->syncable;
1213 /* gst_base_parse_src_eventfunc:
1214 * @parse: #GstBaseParse.
1215 * @event: #GstEvent that was received.
1217 * Default srcpad event handler.
1219 * Returns: TRUE if the event was handled and can be dropped.
1222 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1224 gboolean handled = FALSE;
1226 switch (GST_EVENT_TYPE (event)) {
1227 case GST_EVENT_SEEK:
1229 if (gst_base_parse_is_seekable (parse)) {
1230 handled = gst_base_parse_handle_seek (parse, event);
1242 * gst_base_parse_convert_default:
1243 * @parse: #GstBaseParse.
1244 * @src_format: #GstFormat describing the source format.
1245 * @src_value: Source value to be converted.
1246 * @dest_format: #GstFormat defining the converted format.
1247 * @dest_value: Pointer where the conversion result will be put.
1249 * Default implementation of "convert" vmethod in #GstBaseParse class.
1251 * Returns: TRUE if conversion was successful.
1256 gst_base_parse_convert_default (GstBaseParse * parse,
1257 GstFormat src_format,
1258 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1260 gboolean ret = FALSE;
1261 guint64 bytes, duration;
1263 if (G_UNLIKELY (src_format == dest_format)) {
1264 *dest_value = src_value;
1268 if (G_UNLIKELY (src_value == -1)) {
1273 if (G_UNLIKELY (src_value == 0)) {
1278 /* need at least some frames */
1279 if (!parse->priv->framecount)
1282 duration = parse->priv->acc_duration / GST_MSECOND;
1283 bytes = parse->priv->bytecount;
1285 if (G_UNLIKELY (!duration || !bytes))
1288 if (src_format == GST_FORMAT_BYTES) {
1289 if (dest_format == GST_FORMAT_TIME) {
1290 /* BYTES -> TIME conversion */
1291 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1292 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1293 *dest_value *= GST_MSECOND;
1294 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1295 *dest_value / GST_MSECOND);
1298 } else if (src_format == GST_FORMAT_TIME) {
1299 if (dest_format == GST_FORMAT_BYTES) {
1300 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1301 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1303 GST_DEBUG_OBJECT (parse,
1304 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1305 src_value / GST_MSECOND, *dest_value);
1308 } else if (src_format == GST_FORMAT_DEFAULT) {
1309 /* DEFAULT == frame-based */
1310 if (dest_format == GST_FORMAT_TIME) {
1311 if (parse->priv->fps_den) {
1312 *dest_value = gst_util_uint64_scale (src_value,
1313 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1316 } else if (dest_format == GST_FORMAT_BYTES) {
1324 gst_base_parse_update_duration (GstBaseParse * baseparse)
1327 GstBaseParse *parse;
1329 parse = GST_BASE_PARSE (baseparse);
1331 peer = gst_pad_get_peer (parse->sinkpad);
1333 gboolean qres = FALSE;
1334 gint64 ptot, dest_value;
1336 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1337 gst_object_unref (GST_OBJECT (peer));
1339 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1340 GST_FORMAT_TIME, &dest_value)) {
1342 /* inform if duration changed, but try to avoid spamming */
1343 parse->priv->estimated_drift +=
1344 dest_value - parse->priv->estimated_duration;
1345 if (parse->priv->estimated_drift > GST_SECOND ||
1346 parse->priv->estimated_drift < -GST_SECOND) {
1347 gst_element_post_message (GST_ELEMENT (parse),
1348 gst_message_new_duration (GST_OBJECT (parse),
1349 GST_FORMAT_TIME, dest_value));
1350 parse->priv->estimated_drift = 0;
1352 parse->priv->estimated_duration = dest_value;
1353 GST_LOG_OBJECT (parse,
1354 "updated estimated duration to %" GST_TIME_FORMAT,
1355 GST_TIME_ARGS (dest_value));
1362 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1363 gboolean post_avg, gboolean post_max)
1365 GstTagList *taglist = NULL;
1367 if (post_min && parse->priv->post_min_bitrate) {
1368 taglist = gst_tag_list_new_empty ();
1370 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1371 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1374 if (post_avg && parse->priv->post_avg_bitrate) {
1375 if (taglist == NULL)
1376 taglist = gst_tag_list_new_empty ();
1378 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1379 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1380 parse->priv->avg_bitrate, NULL);
1383 if (post_max && parse->priv->post_max_bitrate) {
1384 if (taglist == NULL)
1385 taglist = gst_tag_list_new_empty ();
1387 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1388 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1391 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1392 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1393 parse->priv->max_bitrate);
1395 if (taglist != NULL) {
1396 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1400 /* gst_base_parse_update_bitrates:
1401 * @parse: #GstBaseParse.
1402 * @buffer: Current frame as a #GstBuffer
1404 * Keeps track of the minimum and maximum bitrates, and also maintains a
1405 * running average bitrate of the stream so far.
1408 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1410 /* Only update the tag on a 10 kbps delta */
1411 static const gint update_threshold = 10000;
1413 guint64 data_len, frame_dur;
1414 gint overhead, frame_bitrate, old_avg_bitrate;
1415 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1416 GstBuffer *buffer = frame->buffer;
1418 overhead = frame->overhead;
1422 data_len = gst_buffer_get_size (buffer) - overhead;
1423 parse->priv->data_bytecount += data_len;
1425 /* duration should be valid by now,
1426 * either set by subclass or maybe based on fps settings */
1427 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1428 /* Calculate duration of a frame from buffer properties */
1429 frame_dur = GST_BUFFER_DURATION (buffer);
1430 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1431 parse->priv->acc_duration;
1434 /* No way to figure out frame duration (is this even possible?) */
1438 /* override if subclass provided bitrate, e.g. metadata based */
1439 if (parse->priv->bitrate) {
1440 parse->priv->avg_bitrate = parse->priv->bitrate;
1441 /* spread this (confirmed) info ASAP */
1442 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1443 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1447 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1451 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1452 parse->priv->avg_bitrate);
1454 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1456 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1457 /* always post all at threshold time */
1458 update_min = update_max = update_avg = TRUE;
1461 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1462 if (frame_bitrate < parse->priv->min_bitrate) {
1463 parse->priv->min_bitrate = frame_bitrate;
1467 if (frame_bitrate > parse->priv->max_bitrate) {
1468 parse->priv->max_bitrate = frame_bitrate;
1472 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1473 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1474 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1479 if ((update_min || update_avg || update_max))
1480 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1487 * gst_base_parse_add_index_entry:
1488 * @parse: #GstBaseParse.
1489 * @offset: offset of entry
1490 * @ts: timestamp associated with offset
1491 * @key: whether entry refers to keyframe
1492 * @force: add entry disregarding sanity checks
1494 * Adds an entry to the index associating @offset to @ts. It is recommended
1495 * to only add keyframe entries. @force allows to bypass checks, such as
1496 * whether the stream is (upstream) seekable, another entry is already "close"
1497 * to the new entry, etc.
1499 * Returns: #gboolean indicating whether entry was added
1504 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1505 GstClockTime ts, gboolean key, gboolean force)
1507 gboolean ret = FALSE;
1508 GstIndexAssociation associations[2];
1510 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1511 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1513 if (G_LIKELY (!force)) {
1515 if (!parse->priv->upstream_seekable) {
1516 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1520 /* FIXME need better helper data structure that handles these issues
1521 * related to ongoing collecting of index entries */
1522 if (parse->priv->index_last_offset >= (gint64) offset) {
1523 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1524 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1528 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1529 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1530 parse->priv->idx_interval) {
1531 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1532 GST_TIME_ARGS (parse->priv->index_last_ts));
1536 /* if last is not really the last one */
1537 if (!parse->priv->index_last_valid) {
1538 GstClockTime prev_ts;
1540 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1541 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1542 GST_DEBUG_OBJECT (parse,
1543 "entry too close to existing entry %" GST_TIME_FORMAT,
1544 GST_TIME_ARGS (prev_ts));
1545 parse->priv->index_last_offset = offset;
1546 parse->priv->index_last_ts = ts;
1552 associations[0].format = GST_FORMAT_TIME;
1553 associations[0].value = ts;
1554 associations[1].format = GST_FORMAT_BYTES;
1555 associations[1].value = offset;
1557 /* index might change on-the-fly, although that would be nutty app ... */
1558 GST_BASE_PARSE_INDEX_LOCK (parse);
1559 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1560 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1561 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1562 (const GstIndexAssociation *) &associations);
1563 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1566 parse->priv->index_last_offset = offset;
1567 parse->priv->index_last_ts = ts;
1576 /* check for seekable upstream, above and beyond a mere query */
1578 gst_base_parse_check_seekability (GstBaseParse * parse)
1581 gboolean seekable = FALSE;
1582 gint64 start = -1, stop = -1;
1583 guint idx_interval = 0;
1585 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1586 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1587 GST_DEBUG_OBJECT (parse, "seeking query failed");
1591 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1593 /* try harder to query upstream size if we didn't get it the first time */
1594 if (seekable && stop == -1) {
1595 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1596 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1599 /* if upstream doesn't know the size, it's likely that it's not seekable in
1600 * practice even if it technically may be seekable */
1601 if (seekable && (start != 0 || stop <= start)) {
1602 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1606 /* let's not put every single frame into our index */
1608 if (stop < 10 * 1024 * 1024)
1610 else if (stop < 100 * 1024 * 1024)
1613 idx_interval = 1000;
1617 gst_query_unref (query);
1619 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1620 G_GUINT64_FORMAT ")", seekable, start, stop);
1621 parse->priv->upstream_seekable = seekable;
1622 parse->priv->upstream_size = seekable ? stop : 0;
1624 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1625 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1628 /* some misc checks on upstream */
1630 gst_base_parse_check_upstream (GstBaseParse * parse)
1634 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1635 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1636 /* upstream has one, accept it also, and no further updates */
1637 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1638 parse->priv->upstream_has_duration = TRUE;
1641 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1642 parse->priv->upstream_has_duration);
1645 /* checks src caps to determine if dealing with audio or video */
1646 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1648 gst_base_parse_check_media (GstBaseParse * parse)
1653 caps = gst_pad_get_current_caps (parse->srcpad);
1654 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1655 parse->priv->is_video =
1656 g_str_has_prefix (gst_structure_get_name (s), "video");
1658 /* historical default */
1659 parse->priv->is_video = FALSE;
1662 gst_caps_unref (caps);
1664 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1667 /* takes ownership of frame */
1669 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1671 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1672 /* frame allocated on the heap, we can just take ownership */
1673 g_queue_push_tail (&parse->priv->queued_frames, frame);
1674 GST_TRACE ("queued frame %p", frame);
1676 GstBaseParseFrame *copy;
1678 /* probably allocated on the stack, must make a proper copy */
1679 copy = gst_base_parse_frame_copy (frame);
1680 g_queue_push_tail (&parse->priv->queued_frames, copy);
1681 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1682 gst_base_parse_frame_free (frame);
1686 /* makes sure that @buf is properly prepared and decorated for passing
1687 * to baseclass, and an equally setup frame is returned setup with @buf.
1688 * Takes ownership of @buf. */
1689 static GstBaseParseFrame *
1690 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1692 GstBaseParseFrame *frame = NULL;
1694 buffer = gst_buffer_make_writable (buffer);
1696 GST_LOG_OBJECT (parse,
1697 "preparing frame at offset %" G_GUINT64_FORMAT
1698 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1699 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1700 gst_buffer_get_size (buffer));
1702 if (parse->priv->discont) {
1703 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1704 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1705 parse->priv->discont = FALSE;
1708 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1710 if (parse->priv->prev_frame) {
1711 if (parse->priv->prev_offset == parse->priv->offset) {
1712 frame = parse->priv->prev_frame;
1714 gst_base_parse_frame_free (parse->priv->prev_frame);
1716 parse->priv->prev_frame = NULL;
1720 frame = gst_base_parse_frame_new (buffer, 0, 0);
1723 /* also ensure to update state flags */
1724 gst_base_parse_frame_update (parse, frame, buffer);
1725 gst_buffer_unref (buffer);
1727 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1729 /* use default handler to provide initial (upstream) metadata */
1730 gst_base_parse_parse_frame (parse, frame);
1736 gst_base_parse_unprepare_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1738 g_assert (parse->priv->prev_frame == NULL);
1740 parse->priv->prev_frame = frame;
1741 gst_base_parse_frame_update (parse, frame, NULL);
1744 /* Wraps buffer in a frame and dispatches to subclass.
1745 * Also manages data skipping and offset handling (including adapter flushing).
1746 * Takes ownership of @buffer */
1747 static GstFlowReturn
1748 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1749 gint * skip, gint * flushed)
1751 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1752 GstBaseParseFrame *frame;
1755 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1757 GST_LOG_OBJECT (parse,
1758 "handling buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1759 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1760 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1761 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1763 /* track what is being flushed during this single round of frame processing */
1764 parse->priv->flushed = 0;
1767 /* make it easy for _finish_frame to pick up input data */
1768 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1769 gst_buffer_ref (buffer);
1770 gst_adapter_push (parse->priv->adapter, buffer);
1773 frame = gst_base_parse_prepare_frame (parse, buffer);
1774 ret = klass->handle_frame (parse, frame, skip);
1775 gst_base_parse_unprepare_frame (parse, frame);
1777 *flushed = parse->priv->flushed;
1779 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1782 if (ret != GST_FLOW_OK) {
1783 GST_DEBUG_OBJECT (parse, "handle_frame returned %d", ret);
1787 /* subclass can only do one of these, or semantics are too unclear */
1788 g_assert (*skip == 0 || *flushed == 0);
1790 /* if it did something, clear frame state,
1791 * though this should also trigger the offset check anyway */
1792 if (*skip != 0 || *flushed != 0) {
1793 GST_LOG_OBJECT (parse, "clearing prev frame");
1794 gst_base_parse_frame_free (parse->priv->prev_frame);
1795 parse->priv->prev_frame = NULL;
1798 /* track skipping */
1800 GstClockTime timestamp;
1803 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1804 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1805 /* reverse playback, and no frames found yet, so we are skipping
1806 * the leading part of a fragment, which may form the tail of
1807 * fragment coming later, hopefully subclass skips efficiently ... */
1808 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
1809 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1810 outbuf = gst_buffer_make_writable (outbuf);
1811 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
1812 parse->priv->buffers_head =
1813 g_slist_prepend (parse->priv->buffers_head, outbuf);
1816 gst_adapter_flush (parse->priv->adapter, *skip);
1818 if (!parse->priv->discont)
1819 parse->priv->sync_offset = parse->priv->offset;
1820 parse->priv->offset += *skip;
1821 parse->priv->discont = TRUE;
1822 /* check for indefinite skipping */
1823 if (ret == GST_FLOW_OK)
1824 ret = gst_base_parse_check_sync (parse);
1827 parse->priv->offset += *flushed;
1830 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1831 gst_adapter_clear (parse->priv->adapter);
1837 /* gst_base_parse_handle_and_push_buffer:
1838 * @parse: #GstBaseParse.
1839 * @klass: #GstBaseParseClass.
1840 * @frame: (transfer full): a #GstBaseParseFrame
1842 * Parses the frame from given buffer and pushes it forward. Also performs
1843 * timestamp handling and checks the segment limits.
1845 * This is called with srcpad STREAM_LOCK held.
1847 * Returns: #GstFlowReturn
1849 static GstFlowReturn
1850 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1851 GstBaseParseFrame * frame)
1856 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1858 /* some one-time start-up */
1859 if (G_UNLIKELY (!parse->priv->framecount)) {
1860 gst_base_parse_check_seekability (parse);
1861 gst_base_parse_check_upstream (parse);
1864 buffer = frame->buffer;
1865 offset = frame->offset;
1867 /* check if subclass/format can provide ts.
1868 * If so, that allows and enables extra seek and duration determining options */
1869 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1870 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1871 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1872 parse->priv->first_frame_offset = offset;
1873 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1874 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1875 " for first frame at offset %" G_GINT64_FORMAT,
1876 GST_TIME_ARGS (parse->priv->first_frame_ts),
1877 parse->priv->first_frame_offset);
1878 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1880 GstClockTime last_ts = G_MAXINT64;
1882 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1883 gst_base_parse_locate_time (parse, &last_ts, &off);
1884 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1885 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1888 /* disable further checks */
1889 parse->priv->first_frame_offset = 0;
1893 /* again use default handler to add missing metadata;
1894 * we may have new information on frame properties */
1895 gst_base_parse_parse_frame (parse, frame);
1896 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1897 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1898 parse->priv->next_ts =
1899 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1901 /* we lost track, do not produce bogus time next time around
1902 * (probably means parser subclass has given up on parsing as well) */
1903 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1904 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1907 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1908 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1909 gst_base_parse_add_index_entry (parse, offset,
1910 GST_BUFFER_TIMESTAMP (buffer),
1911 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1913 /* All OK, push queued frames if there are any */
1914 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1915 GstBaseParseFrame *queued_frame;
1917 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1918 gst_base_parse_push_frame (parse, queued_frame);
1922 return gst_base_parse_push_frame (parse, frame);
1926 * gst_base_parse_push_frame:
1927 * @parse: #GstBaseParse.
1928 * @frame: (transfer none): a #GstBaseParseFrame
1930 * Pushes the frame's buffer downstream, sends any pending events and
1931 * does some timestamp and segment handling. Takes ownership of
1932 * frame's buffer, though caller retains ownership of @frame.
1934 * This must be called with sinkpad STREAM_LOCK held.
1936 * Returns: #GstFlowReturn
1941 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1943 GstFlowReturn ret = GST_FLOW_OK;
1944 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1945 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1946 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1950 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1951 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1953 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1955 buffer = frame->buffer;
1957 GST_LOG_OBJECT (parse,
1958 "processing buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1959 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1960 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1961 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1964 parse->priv->bytecount += frame->size;
1965 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1966 parse->priv->framecount++;
1967 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1968 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1971 /* 0 means disabled */
1972 if (parse->priv->update_interval < 0)
1973 parse->priv->update_interval = 50;
1974 else if (parse->priv->update_interval > 0 &&
1975 (parse->priv->framecount % parse->priv->update_interval) == 0)
1976 gst_base_parse_update_duration (parse);
1978 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1979 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1980 if (last_start != GST_CLOCK_TIME_NONE
1981 && GST_BUFFER_DURATION_IS_VALID (buffer))
1982 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1984 /* should have caps by now */
1985 if (!gst_pad_has_current_caps (parse->srcpad))
1988 /* segment adjustment magic; only if we are running the whole show */
1989 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
1990 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
1991 parse->priv->upstream_seekable)) {
1992 /* segment times are typically estimates,
1993 * actual frame data might lead subclass to different timestamps,
1994 * so override segment start from what is supplied there */
1995 if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
1996 && GST_CLOCK_TIME_IS_VALID (last_start))) {
1997 gst_event_unref (parse->priv->pending_segment);
1998 parse->segment.start =
1999 MIN ((guint64) last_start, (guint64) parse->segment.stop);
2001 GST_DEBUG_OBJECT (parse,
2002 "adjusting pending segment start to %" GST_TIME_FORMAT,
2003 GST_TIME_ARGS (parse->segment.start));
2005 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
2007 /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
2008 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2009 GST_CLOCK_TIME_IS_VALID (last_start)) {
2010 GstClockTimeDiff diff;
2012 /* only send newsegments with increasing start times,
2013 * otherwise if these go back and forth downstream (sinks) increase
2014 * accumulated time and running_time */
2015 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2016 if (G_UNLIKELY (diff > 2 * GST_SECOND
2017 && last_start > parse->segment.start
2018 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2019 || last_start < parse->segment.stop))) {
2021 GST_DEBUG_OBJECT (parse,
2022 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2023 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2024 "Sending updated NEWSEGMENT events", diff,
2025 GST_TIME_ARGS (parse->segment.position),
2026 GST_TIME_ARGS (last_start));
2028 if (G_UNLIKELY (parse->priv->pending_segment)) {
2029 gst_event_unref (parse->priv->pending_segment);
2030 parse->segment.start = last_start;
2031 parse->segment.time = last_start;
2032 parse->priv->pending_segment =
2033 gst_event_new_segment (&parse->segment);
2035 /* skip gap FIXME */
2036 gst_pad_push_event (parse->srcpad,
2037 gst_event_new_segment (&parse->segment));
2039 parse->segment.position = last_start;
2044 if (G_UNLIKELY (parse->priv->pending_segment)) {
2045 GstEvent *pending_segment;
2047 pending_segment = parse->priv->pending_segment;
2048 parse->priv->pending_segment = NULL;
2050 GST_DEBUG_OBJECT (parse, "%s push pending segment",
2051 parse->priv->pad_mode == GST_PAD_MODE_PULL ? "loop" : "chain");
2052 gst_pad_push_event (parse->srcpad, pending_segment);
2054 /* have caps; check identity */
2055 gst_base_parse_check_media (parse);
2058 /* update bitrates and optionally post corresponding tags
2059 * (following newsegment) */
2060 gst_base_parse_update_bitrates (parse, frame);
2062 if (G_UNLIKELY (parse->priv->pending_events)) {
2065 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
2066 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2068 g_list_free (parse->priv->pending_events);
2069 parse->priv->pending_events = NULL;
2072 if (klass->pre_push_frame) {
2073 ret = klass->pre_push_frame (parse, frame);
2075 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2078 /* take final ownership of frame buffer */
2079 if (frame->out_buffer) {
2080 buffer = frame->out_buffer;
2081 frame->out_buffer = NULL;
2082 gst_buffer_replace (&frame->buffer, NULL);
2084 buffer = frame->buffer;
2085 frame->buffer = NULL;
2088 /* subclass must play nice */
2089 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2091 size = gst_buffer_get_size (buffer);
2093 parse->priv->seen_keyframe |= parse->priv->is_video &&
2094 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2096 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2097 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2098 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2099 GST_BUFFER_TIMESTAMP (buffer) >
2100 parse->segment.stop + parse->priv->lead_out_ts) {
2101 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2103 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2104 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2105 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2106 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2107 parse->priv->lead_in_ts < parse->segment.start) {
2108 if (parse->priv->seen_keyframe) {
2109 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2112 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2113 ret = GST_BASE_PARSE_FLOW_DROPPED;
2120 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2121 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2122 gst_buffer_unref (buffer);
2124 } else if (ret == GST_FLOW_OK) {
2125 if (parse->segment.rate > 0.0) {
2126 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2128 ret = gst_pad_push (parse->srcpad, buffer);
2129 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2131 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2133 parse->priv->buffers_queued =
2134 g_slist_prepend (parse->priv->buffers_queued, buffer);
2138 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2139 size, gst_flow_get_name (ret));
2140 gst_buffer_unref (buffer);
2141 /* if we are not sufficiently in control, let upstream decide on EOS */
2142 if (ret == GST_FLOW_EOS &&
2143 (parse->priv->passthrough ||
2144 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2145 !parse->priv->upstream_seekable)))
2149 /* Update current running segment position */
2150 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2151 parse->segment.position < last_stop)
2152 parse->segment.position = last_stop;
2159 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2160 return GST_FLOW_ERROR;
2165 * gst_base_parse_finish_frame:
2166 * @parse: a #GstBaseParse
2167 * @frame: a #GstBaseParseFrame
2168 * @size: consumed input data represented by frame
2170 * Collects parsed data and pushes this downstream.
2171 * Source pad caps must be set when this is called.
2173 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2174 * Otherwise, @size samples will be taken from the input and used for output,
2175 * and the output's metadata (timestamps etc) will be taken as (optionally)
2176 * set by the subclass on @frame's (input) buffer.
2178 * Note that the latter buffer is invalidated by this call, whereas the
2179 * caller retains ownership of @frame.
2181 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2186 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2189 GstFlowReturn ret = GST_FLOW_OK;
2191 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2192 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2193 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2194 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2197 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2198 "flushing size %d", frame->offset, size);
2200 if (parse->priv->scanning && frame->buffer) {
2201 if (!parse->priv->scanned_frame) {
2202 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2207 parse->priv->flushed += size;
2209 /* either PUSH or PULL mode arranges for adapter data */
2210 /* ensure output buffer */
2211 if (!frame->out_buffer) {
2212 GstBuffer *src, *dest;
2214 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2215 dest = frame->out_buffer;
2216 src = frame->buffer;
2217 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2218 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2219 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2220 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2221 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2222 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2224 gst_adapter_flush (parse->priv->adapter, size);
2227 /* use as input for subsequent processing */
2228 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2229 gst_buffer_unref (frame->out_buffer);
2230 frame->out_buffer = NULL;
2232 /* subclass might queue frames/data internally if it needs more
2233 * frames to decide on the format, or might request us to queue here. */
2234 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2235 gst_buffer_replace (&frame->buffer, NULL);
2237 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2238 GstBaseParseFrame *copy;
2240 copy = gst_base_parse_frame_copy (frame);
2241 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2242 gst_base_parse_queue_frame (parse, copy);
2246 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2252 /* gst_base_parse_drain:
2254 * Drains the adapter until it is empty. It decreases the min_frame_size to
2255 * match the current adapter size and calls chain method until the adapter
2256 * is emptied or chain returns with error.
2259 gst_base_parse_drain (GstBaseParse * parse)
2263 GST_DEBUG_OBJECT (parse, "draining");
2264 parse->priv->drain = TRUE;
2267 avail = gst_adapter_available (parse->priv->adapter);
2271 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2272 NULL) != GST_FLOW_OK) {
2276 /* nothing changed, maybe due to truncated frame; break infinite loop */
2277 if (avail == gst_adapter_available (parse->priv->adapter)) {
2278 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2279 gst_adapter_clear (parse->priv->adapter);
2283 parse->priv->drain = FALSE;
2286 /* gst_base_parse_send_buffers
2288 * Sends buffers collected in send_buffers downstream, and ensures that list
2289 * is empty at the end (errors or not).
2291 static GstFlowReturn
2292 gst_base_parse_send_buffers (GstBaseParse * parse)
2294 GSList *send = NULL;
2296 GstFlowReturn ret = GST_FLOW_OK;
2298 send = parse->priv->buffers_send;
2302 buf = GST_BUFFER_CAST (send->data);
2303 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
2304 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2305 ", offset %" G_GINT64_FORMAT, buf,
2306 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2307 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2309 /* iterate output queue an push downstream */
2310 ret = gst_pad_push (parse->srcpad, buf);
2311 send = g_slist_delete_link (send, send);
2313 /* clear any leftover if error */
2314 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2316 buf = GST_BUFFER_CAST (send->data);
2317 gst_buffer_unref (buf);
2318 send = g_slist_delete_link (send, send);
2323 parse->priv->buffers_send = send;
2328 /* gst_base_parse_start_fragment:
2330 * Prepares for processing a reverse playback (forward) fragment
2331 * by (re)setting proper state variables.
2333 static GstFlowReturn
2334 gst_base_parse_start_fragment (GstBaseParse * parse)
2336 GST_LOG_OBJECT (parse, "starting fragment");
2338 /* invalidate so no fall-back timestamping is performed;
2339 * ok if taken from subclass or upstream */
2340 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2341 parse->priv->prev_ts = GST_CLOCK_TIME_NONE;
2342 /* prevent it hanging around stop all the time */
2343 parse->segment.position = GST_CLOCK_TIME_NONE;
2345 parse->priv->discont = TRUE;
2347 /* head of previous fragment is now pending tail of current fragment */
2348 parse->priv->buffers_pending = parse->priv->buffers_head;
2349 parse->priv->buffers_head = NULL;
2355 /* gst_base_parse_finish_fragment:
2357 * Processes a reverse playback (forward) fragment:
2358 * - append head of last fragment that was skipped to current fragment data
2359 * - drain the resulting current fragment data (i.e. repeated chain)
2360 * - add time/duration (if needed) to frames queued by chain
2361 * - push queued data
2363 static GstFlowReturn
2364 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2367 GstFlowReturn ret = GST_FLOW_OK;
2368 gboolean seen_key = FALSE, seen_delta = FALSE;
2370 GST_LOG_OBJECT (parse, "finishing fragment");
2373 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2374 while (parse->priv->buffers_pending) {
2375 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2377 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2378 gst_buffer_get_size (buf));
2379 gst_adapter_push (parse->priv->adapter, buf);
2381 GST_LOG_OBJECT (parse, "discarding head buffer");
2382 gst_buffer_unref (buf);
2384 parse->priv->buffers_pending =
2385 g_slist_delete_link (parse->priv->buffers_pending,
2386 parse->priv->buffers_pending);
2389 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2390 /* initial skipped data is added to buffers_pending */
2391 gst_base_parse_drain (parse);
2393 if (parse->priv->buffers_send) {
2394 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2395 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2398 /* add metadata (if needed to queued buffers */
2399 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2400 GST_TIME_ARGS (parse->priv->last_ts));
2401 while (parse->priv->buffers_queued) {
2402 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2404 /* no touching if upstream or parsing provided time */
2405 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2406 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2407 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2408 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2409 GST_BUFFER_DURATION_IS_VALID (buf)) {
2410 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2411 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2413 parse->priv->last_ts = 0;
2414 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2415 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2416 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2418 /* no idea, very bad */
2419 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2422 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2424 /* reverse order for ascending sending */
2425 /* send downstream at keyframe not preceded by a keyframe
2426 * (e.g. that should identify start of collection of IDR nals) */
2427 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2429 ret = gst_base_parse_send_buffers (parse);
2430 /* if a problem, throw all to sending */
2431 if (ret != GST_FLOW_OK) {
2432 parse->priv->buffers_send =
2433 g_slist_reverse (parse->priv->buffers_queued);
2434 parse->priv->buffers_queued = NULL;
2444 parse->priv->buffers_send =
2445 g_slist_prepend (parse->priv->buffers_send, buf);
2446 parse->priv->buffers_queued =
2447 g_slist_delete_link (parse->priv->buffers_queued,
2448 parse->priv->buffers_queued);
2451 /* audio may have all marked as keyframe, so arrange to send here */
2453 ret = gst_base_parse_send_buffers (parse);
2455 /* any trailing unused no longer usable (ideally none) */
2456 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2457 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2458 gst_adapter_available (parse->priv->adapter));
2459 gst_adapter_clear (parse->priv->adapter);
2465 /* small helper that checks whether we have been trying to resync too long */
2466 static inline GstFlowReturn
2467 gst_base_parse_check_sync (GstBaseParse * parse)
2469 if (G_UNLIKELY (parse->priv->discont &&
2470 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2471 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2472 ("Failed to parse stream"), (NULL));
2473 return GST_FLOW_ERROR;
2479 static GstFlowReturn
2480 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2482 GstBaseParseClass *bclass;
2483 GstBaseParse *parse;
2484 GstFlowReturn ret = GST_FLOW_OK;
2485 GstBuffer *tmpbuf = NULL;
2490 GstClockTime timestamp;
2492 parse = GST_BASE_PARSE (parent);
2493 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2495 if (parse->priv->detecting) {
2496 GstBuffer *detect_buf;
2498 if (parse->priv->detect_buffers_size == 0) {
2499 detect_buf = gst_buffer_ref (buffer);
2504 detect_buf = gst_buffer_new ();
2506 for (l = parse->priv->detect_buffers; l; l = l->next) {
2507 gsize tmpsize = gst_buffer_get_size (l->data);
2509 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2510 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2514 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2515 offset, gst_buffer_get_size (buffer));
2518 ret = bclass->detect (parse, detect_buf);
2519 gst_buffer_unref (detect_buf);
2521 if (ret == GST_FLOW_OK) {
2524 /* Detected something */
2525 parse->priv->detecting = FALSE;
2527 for (l = parse->priv->detect_buffers; l; l = l->next) {
2528 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2530 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2531 parent, GST_BUFFER_CAST (l->data));
2533 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2535 g_list_free (parse->priv->detect_buffers);
2536 parse->priv->detect_buffers = NULL;
2537 parse->priv->detect_buffers_size = 0;
2539 if (ret != GST_FLOW_OK) {
2543 /* Handle the current buffer */
2544 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2545 /* Still detecting, append buffer or error out if draining */
2547 if (parse->priv->drain) {
2548 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2549 return GST_FLOW_ERROR;
2550 } else if (parse->priv->flushing) {
2551 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2553 g_list_free (parse->priv->detect_buffers);
2554 parse->priv->detect_buffers = NULL;
2555 parse->priv->detect_buffers_size = 0;
2557 parse->priv->detect_buffers =
2558 g_list_append (parse->priv->detect_buffers, buffer);
2559 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2563 /* Something went wrong, subclass responsible for error reporting */
2567 /* And now handle the current buffer if detection worked */
2570 if (G_LIKELY (buffer)) {
2571 GST_LOG_OBJECT (parse,
2572 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT,
2573 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer));
2574 if (G_UNLIKELY (parse->priv->passthrough)) {
2575 GstBaseParseFrame frame;
2577 gst_base_parse_frame_init (&frame);
2578 frame.buffer = gst_buffer_make_writable (buffer);
2579 ret = gst_base_parse_push_frame (parse, &frame);
2580 gst_base_parse_frame_free (&frame);
2583 /* upstream feeding us in reverse playback;
2584 * finish previous fragment and start new upon DISCONT */
2585 if (parse->segment.rate < 0.0) {
2586 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2587 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2588 ret = gst_base_parse_finish_fragment (parse, TRUE);
2589 gst_base_parse_start_fragment (parse);
2592 gst_adapter_push (parse->priv->adapter, buffer);
2595 /* Parse and push as many frames as possible */
2596 /* Stop either when adapter is empty or we are flushing */
2597 while (!parse->priv->flushing) {
2600 /* Synchronization loop */
2602 /* note: if subclass indicates MAX fsize,
2603 * this will not likely be available anyway ... */
2604 min_size = MAX (parse->priv->min_frame_size, fsize);
2605 av = gst_adapter_available (parse->priv->adapter);
2607 if (G_UNLIKELY (parse->priv->drain)) {
2609 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2610 if (G_UNLIKELY (!min_size)) {
2615 /* Collect at least min_frame_size bytes */
2616 if (av < min_size) {
2617 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
2622 /* move along with upstream timestamp (if any),
2623 * but interpolate in between */
2624 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2625 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2626 (parse->priv->prev_ts != timestamp)) {
2627 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2630 /* always pass all available data */
2631 data = gst_adapter_map (parse->priv->adapter, av);
2632 /* arrange for actual data to be copied if subclass tries to,
2633 * since what is passed is tied to the adapter */
2634 tmpbuf = gst_buffer_new ();
2635 gst_buffer_take_memory (tmpbuf, -1,
2636 gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY |
2637 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, NULL, av, 0, av));
2638 GST_BUFFER_TIMESTAMP (tmpbuf) = timestamp;
2640 /* keep the adapter mapped, so keep track of what has to be flushed */
2641 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2644 /* probably already implicitly unmapped due to adapter operation,
2645 * but for good measure ... */
2646 gst_adapter_unmap (parse->priv->adapter);
2647 if (ret != GST_FLOW_OK) {
2650 if (skip == 0 && flush == 0) {
2651 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2652 "breaking to get more data");
2657 /* Grab lock to prevent a race with FLUSH_START handler */
2658 GST_PAD_STREAM_LOCK (parse->srcpad);
2660 /* FLUSH_START event causes the "flushing" flag to be set. In this
2661 * case we can leave the frame pushing loop */
2662 if (parse->priv->flushing) {
2663 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2669 GST_LOG_OBJECT (parse, "chain leaving");
2673 /* pull @size bytes at current offset,
2674 * i.e. at least try to and possibly return a shorter buffer if near the end */
2675 static GstFlowReturn
2676 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2677 GstBuffer ** buffer)
2679 GstFlowReturn ret = GST_FLOW_OK;
2681 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2683 /* Caching here actually makes much less difference than one would expect.
2684 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2685 if (parse->priv->cache) {
2686 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2687 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2689 if (cache_offset <= parse->priv->offset &&
2690 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2691 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2692 parse->priv->offset - cache_offset, size);
2693 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2696 /* not enough data in the cache, free cache and get a new one */
2697 gst_buffer_unref (parse->priv->cache);
2698 parse->priv->cache = NULL;
2701 /* refill the cache */
2703 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2704 64 * 1024), &parse->priv->cache);
2705 if (ret != GST_FLOW_OK) {
2706 parse->priv->cache = NULL;
2710 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2712 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2714 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2718 /* Not possible to get enough data, try a last time with
2719 * requesting exactly the size we need */
2720 gst_buffer_unref (parse->priv->cache);
2721 parse->priv->cache = NULL;
2723 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2724 &parse->priv->cache);
2726 if (ret != GST_FLOW_OK) {
2727 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2732 if (gst_buffer_get_size (parse->priv->cache) < size) {
2733 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2734 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2735 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2737 *buffer = parse->priv->cache;
2738 parse->priv->cache = NULL;
2744 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2745 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2750 static GstFlowReturn
2751 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2754 GstClockTime ts = 0;
2758 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2759 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2760 parse->priv->last_offset);
2762 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2763 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2764 GST_TIME_ARGS (parse->segment.start));
2769 /* last fragment started at last_offset / last_ts;
2770 * seek back 10s capped at 1MB */
2771 if (parse->priv->last_ts >= 10 * GST_SECOND)
2772 ts = parse->priv->last_ts - 10 * GST_SECOND;
2773 /* if we are exact now, we will be more so going backwards */
2774 if (parse->priv->exact_position) {
2775 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2777 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2778 GST_FORMAT_BYTES, &offset)) {
2779 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2782 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2783 parse->priv->last_offset - 1024);
2784 offset = MAX (0, offset);
2786 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2788 parse->priv->offset = offset;
2790 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2792 if (ret != GST_FLOW_OK)
2795 /* offset will increase again as fragment is processed/parsed */
2796 parse->priv->last_offset = offset;
2798 gst_base_parse_start_fragment (parse);
2799 gst_adapter_push (parse->priv->adapter, buffer);
2800 ret = gst_base_parse_finish_fragment (parse, TRUE);
2801 if (ret != GST_FLOW_OK)
2804 /* force previous fragment */
2805 parse->priv->offset = -1;
2812 * pull and scan for next frame starting from current offset
2813 * ajusts sync, drain and offset going along */
2814 static GstFlowReturn
2815 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2819 GstFlowReturn ret = GST_FLOW_OK;
2820 guint fsize, min_size;
2824 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2825 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2827 /* let's make this efficient for all subclass once and for all;
2828 * maybe it does not need this much, but in the latter case, we know we are
2829 * in pull mode here and might as well try to read and supply more anyway
2830 * (so does the buffer caching mechanism) */
2834 min_size = MAX (parse->priv->min_frame_size, fsize);
2836 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2838 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2839 if (ret != GST_FLOW_OK)
2842 /* if we got a short read, inform subclass we are draining leftover
2843 * and no more is to be expected */
2844 if (gst_buffer_get_size (buffer) < min_size) {
2845 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2846 parse->priv->drain = TRUE;
2849 if (parse->priv->detecting) {
2850 ret = klass->detect (parse, buffer);
2851 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2852 /* If draining we error out, otherwise request a buffer
2854 if (parse->priv->drain) {
2855 gst_buffer_unref (buffer);
2856 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2857 return GST_FLOW_ERROR;
2860 gst_buffer_unref (buffer);
2863 } else if (ret != GST_FLOW_OK) {
2864 gst_buffer_unref (buffer);
2865 GST_ERROR_OBJECT (parse, "detect() returned %s",
2866 gst_flow_get_name (ret));
2870 /* Else handle this buffer normally */
2873 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2874 if (ret != GST_FLOW_OK)
2877 /* something flushed means something happened,
2878 * and we should bail out of this loop so as not to occupy
2879 * the task thread indefinitely */
2881 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2884 /* nothing flushed, no skip and draining, so nothing left to do */
2885 if (!skip && parse->priv->drain) {
2886 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2887 "breaking loop and marking EOS");
2891 /* otherwise, get some more data
2892 * note that is checked this does not happen indefinitely */
2894 GST_LOG_OBJECT (parse, "getting some more data");
2897 parse->priv->drain = FALSE;
2904 /* Loop that is used in pull mode to retrieve data from upstream */
2906 gst_base_parse_loop (GstPad * pad)
2908 GstBaseParse *parse;
2909 GstBaseParseClass *klass;
2910 GstFlowReturn ret = GST_FLOW_OK;
2912 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2913 klass = GST_BASE_PARSE_GET_CLASS (parse);
2915 /* reverse playback:
2916 * first fragment (closest to stop time) is handled normally below,
2917 * then we pull in fragments going backwards */
2918 if (parse->segment.rate < 0.0) {
2919 /* check if we jumped back to a previous fragment,
2920 * which is a post-first fragment */
2921 if (parse->priv->offset < 0) {
2922 ret = gst_base_parse_handle_previous_fragment (parse);
2927 ret = gst_base_parse_scan_frame (parse, klass, TRUE);
2928 if (ret != GST_FLOW_OK)
2931 /* eat expected eos signalling past segment in reverse playback */
2932 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
2933 parse->segment.position >= parse->segment.stop) {
2934 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2935 /* push what was accumulated during loop run */
2936 gst_base_parse_finish_fragment (parse, FALSE);
2937 /* force previous fragment */
2938 parse->priv->offset = -1;
2943 if (ret == GST_FLOW_EOS)
2945 else if (ret != GST_FLOW_OK)
2948 gst_object_unref (parse);
2955 GST_DEBUG_OBJECT (parse, "eos");
2960 gboolean push_eos = FALSE;
2962 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2963 gst_flow_get_name (ret));
2964 gst_pad_pause_task (parse->sinkpad);
2966 if (ret == GST_FLOW_EOS) {
2967 /* handle end-of-stream/segment */
2968 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2971 if ((stop = parse->segment.stop) == -1)
2972 stop = parse->segment.duration;
2974 GST_DEBUG_OBJECT (parse, "sending segment_done");
2976 gst_element_post_message
2977 (GST_ELEMENT_CAST (parse),
2978 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2979 GST_FORMAT_TIME, stop));
2981 /* If we STILL have zero frames processed, fire an error */
2982 if (parse->priv->framecount == 0) {
2983 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2984 ("No valid frames found before end of stream"), (NULL));
2988 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
2989 /* for fatal errors we post an error message, wrong-state is
2990 * not fatal because it happens due to flushes and only means
2991 * that we should stop now. */
2992 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2993 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2997 /* newsegment before eos */
2998 if (parse->priv->pending_segment) {
2999 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
3000 parse->priv->pending_segment = NULL;
3002 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3004 gst_object_unref (parse);
3009 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3011 GstBaseParse *parse;
3012 gboolean result = TRUE;
3016 parse = GST_BASE_PARSE (parent);
3018 GST_DEBUG_OBJECT (parse, "sink activate");
3020 query = gst_query_new_scheduling ();
3021 result = gst_pad_peer_query (sinkpad, query);
3023 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
3027 gst_query_unref (query);
3030 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3031 result = gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
3033 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3034 result = gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3037 GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
3042 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3044 GstBaseParseClass *klass;
3045 gboolean result = TRUE;
3047 GST_DEBUG_OBJECT (parse, "activate %d", active);
3049 klass = GST_BASE_PARSE_GET_CLASS (parse);
3052 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3053 result = klass->start (parse);
3055 /* If the subclass implements ::detect we want to
3056 * call it for the first buffers now */
3057 parse->priv->detecting = (klass->detect != NULL);
3059 /* We must make sure streaming has finished before resetting things
3060 * and calling the ::stop vfunc */
3061 GST_PAD_STREAM_LOCK (parse->sinkpad);
3062 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3064 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3065 result = klass->stop (parse);
3067 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3069 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3074 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3075 GstPadMode mode, gboolean active)
3077 gboolean result = TRUE;
3078 GstBaseParse *parse;
3080 parse = GST_BASE_PARSE (parent);
3082 GST_DEBUG_OBJECT (parse, "sink activate mode %d, %d", mode, active);
3084 result = gst_base_parse_activate (parse, active);
3088 case GST_PAD_MODE_PULL:
3090 parse->priv->pending_segment =
3091 gst_event_new_segment (&parse->segment);
3093 gst_pad_start_task (pad, (GstTaskFunction) gst_base_parse_loop,
3096 result &= gst_pad_stop_task (pad);
3104 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3106 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3112 * gst_base_parse_set_duration:
3113 * @parse: #GstBaseParse.
3115 * @duration: duration value.
3116 * @interval: how often to update the duration estimate based on bitrate, or 0.
3118 * Sets the duration of the currently playing media. Subclass can use this
3119 * when it is able to determine duration and/or notices a change in the media
3120 * duration. Alternatively, if @interval is non-zero (default), then stream
3121 * duration is determined based on estimated bitrate, and updated every @interval
3127 gst_base_parse_set_duration (GstBaseParse * parse,
3128 GstFormat fmt, gint64 duration, gint interval)
3130 g_return_if_fail (parse != NULL);
3132 if (parse->priv->upstream_has_duration) {
3133 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3137 if (duration != parse->priv->duration) {
3140 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
3141 gst_element_post_message (GST_ELEMENT (parse), m);
3143 /* TODO: what about duration tag? */
3145 parse->priv->duration = duration;
3146 parse->priv->duration_fmt = fmt;
3147 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3148 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3149 if (interval != 0) {
3150 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3154 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3155 parse->priv->update_interval = interval;
3161 * gst_base_parse_set_average_bitrate:
3162 * @parse: #GstBaseParse.
3163 * @bitrate: average bitrate in bits/second
3165 * Optionally sets the average bitrate detected in media (if non-zero),
3166 * e.g. based on metadata, as it will be posted to the application.
3168 * By default, announced average bitrate is estimated. The average bitrate
3169 * is used to estimate the total duration of the stream and to estimate
3170 * a seek position, if there's no index and the format is syncable
3171 * (see gst_base_parse_set_syncable()).
3176 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3178 parse->priv->bitrate = bitrate;
3179 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3183 * gst_base_parse_set_min_frame_size:
3184 * @parse: #GstBaseParse.
3185 * @min_size: Minimum size of the data that this base class should give to
3188 * Subclass can use this function to tell the base class that it needs to
3189 * give at least #min_size buffers.
3194 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3196 g_return_if_fail (parse != NULL);
3198 parse->priv->min_frame_size = min_size;
3199 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3203 * gst_base_parse_set_frame_rate:
3204 * @parse: the #GstBaseParse to set
3205 * @fps_num: frames per second (numerator).
3206 * @fps_den: frames per second (denominator).
3207 * @lead_in: frames needed before a segment for subsequent decode
3208 * @lead_out: frames needed after a segment
3210 * If frames per second is configured, parser can take care of buffer duration
3211 * and timestamping. When performing segment clipping, or seeking to a specific
3212 * location, a corresponding decoder might need an initial @lead_in and a
3213 * following @lead_out number of frames to ensure the desired segment is
3214 * entirely filled upon decoding.
3219 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3220 guint fps_den, guint lead_in, guint lead_out)
3222 g_return_if_fail (parse != NULL);
3224 parse->priv->fps_num = fps_num;
3225 parse->priv->fps_den = fps_den;
3226 if (!fps_num || !fps_den) {
3227 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3229 fps_num = fps_den = 0;
3230 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3231 parse->priv->lead_in = parse->priv->lead_out = 0;
3232 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3234 parse->priv->frame_duration =
3235 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3236 parse->priv->lead_in = lead_in;
3237 parse->priv->lead_out = lead_out;
3238 parse->priv->lead_in_ts =
3239 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3240 parse->priv->lead_out_ts =
3241 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3242 /* aim for about 1.5s to estimate duration */
3243 if (parse->priv->update_interval < 0) {
3244 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3245 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3246 parse->priv->update_interval);
3249 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3250 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3251 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3252 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3253 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3254 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3258 * gst_base_parse_set_has_timing_info:
3259 * @parse: a #GstBaseParse
3260 * @has_timing: whether frames carry timing information
3262 * Set if frames carry timing information which the subclass can (generally)
3263 * parse and provide. In particular, intrinsic (rather than estimated) time
3264 * can be obtained following a seek.
3269 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3271 parse->priv->has_timing_info = has_timing;
3272 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3276 * gst_base_parse_set_syncable:
3277 * @parse: a #GstBaseParse
3278 * @syncable: set if frame starts can be identified
3280 * Set if frame starts can be identified. This is set by default and
3281 * determines whether seeking based on bitrate averages
3282 * is possible for a format/stream.
3287 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3289 parse->priv->syncable = syncable;
3290 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3294 * gst_base_parse_set_passthrough:
3295 * @parse: a #GstBaseParse
3296 * @passthrough: %TRUE if parser should run in passthrough mode
3298 * Set if the nature of the format or configuration does not allow (much)
3299 * parsing, and the parser should operate in passthrough mode (which only
3300 * applies when operating in push mode). That is, incoming buffers are
3301 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3302 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3303 * so subclass can perform as much or as little is appropriate for
3304 * passthrough semantics in @pre_push_frame.
3309 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3311 parse->priv->passthrough = passthrough;
3312 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3316 * gst_base_parse_set_latency:
3317 * @parse: a #GstBaseParse
3318 * @min_latency: minimum parse latency
3319 * @max_latency: maximum parse latency
3321 * Sets the minimum and maximum (which may likely be equal) latency introduced
3322 * by the parsing process. If there is such a latency, which depends on the
3323 * particular parsing of the format, it typically corresponds to 1 frame duration.
3328 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3329 GstClockTime max_latency)
3331 GST_OBJECT_LOCK (parse);
3332 parse->priv->min_latency = min_latency;
3333 parse->priv->max_latency = max_latency;
3334 GST_OBJECT_UNLOCK (parse);
3335 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3336 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3337 GST_TIME_ARGS (max_latency));
3341 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3342 GstClockTime * duration)
3344 gboolean res = FALSE;
3346 g_return_val_if_fail (duration != NULL, FALSE);
3348 *duration = GST_CLOCK_TIME_NONE;
3349 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3350 GST_LOG_OBJECT (parse, "using provided duration");
3351 *duration = parse->priv->duration;
3353 } else if (parse->priv->duration != -1) {
3354 GST_LOG_OBJECT (parse, "converting provided duration");
3355 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3356 parse->priv->duration, format, (gint64 *) duration);
3357 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3358 GST_LOG_OBJECT (parse, "using estimated duration");
3359 *duration = parse->priv->estimated_duration;
3363 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3364 GST_TIME_ARGS (*duration));
3369 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
3371 GstBaseParse *parse;
3372 gboolean res = FALSE;
3374 parse = GST_BASE_PARSE (parent);
3376 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3378 switch (GST_QUERY_TYPE (query)) {
3379 case GST_QUERY_POSITION:
3384 GST_DEBUG_OBJECT (parse, "position query");
3385 gst_query_parse_position (query, &format, NULL);
3387 /* try upstream first */
3388 res = gst_pad_query_default (pad, parent, query);
3390 /* Fall back on interpreting segment */
3391 GST_OBJECT_LOCK (parse);
3392 if (format == GST_FORMAT_BYTES) {
3393 dest_value = parse->priv->offset;
3395 } else if (format == parse->segment.format &&
3396 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3397 dest_value = gst_segment_to_stream_time (&parse->segment,
3398 parse->segment.format, parse->segment.position);
3401 GST_OBJECT_UNLOCK (parse);
3403 /* no precise result, upstream no idea either, then best estimate */
3404 /* priv->offset is updated in both PUSH/PULL modes */
3405 res = gst_base_parse_convert (parse,
3406 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3409 gst_query_set_position (query, format, dest_value);
3413 case GST_QUERY_DURATION:
3416 GstClockTime duration;
3418 GST_DEBUG_OBJECT (parse, "duration query");
3419 gst_query_parse_duration (query, &format, NULL);
3421 /* consult upstream */
3422 res = gst_pad_query_default (pad, parent, query);
3424 /* otherwise best estimate from us */
3426 res = gst_base_parse_get_duration (parse, format, &duration);
3428 gst_query_set_duration (query, format, duration);
3432 case GST_QUERY_SEEKING:
3435 GstClockTime duration = GST_CLOCK_TIME_NONE;
3436 gboolean seekable = FALSE;
3438 GST_DEBUG_OBJECT (parse, "seeking query");
3439 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3441 /* consult upstream */
3442 res = gst_pad_query_default (pad, parent, query);
3444 /* we may be able to help if in TIME */
3445 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3446 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3447 /* already OK if upstream takes care */
3448 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3450 if (!(res && seekable)) {
3451 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3452 || duration == -1) {
3453 /* seekable if we still have a chance to get duration later on */
3455 parse->priv->upstream_seekable && parse->priv->update_interval;
3457 seekable = parse->priv->upstream_seekable;
3458 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3461 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3467 case GST_QUERY_FORMATS:
3468 gst_query_set_formatsv (query, 3, fmtlist);
3471 case GST_QUERY_CONVERT:
3473 GstFormat src_format, dest_format;
3474 gint64 src_value, dest_value;
3476 gst_query_parse_convert (query, &src_format, &src_value,
3477 &dest_format, &dest_value);
3479 res = gst_base_parse_convert (parse, src_format, src_value,
3480 dest_format, &dest_value);
3482 gst_query_set_convert (query, src_format, src_value,
3483 dest_format, dest_value);
3487 case GST_QUERY_LATENCY:
3489 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3491 GstClockTime min_latency, max_latency;
3493 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3494 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3495 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3496 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3498 GST_OBJECT_LOCK (parse);
3499 /* add our latency */
3500 if (min_latency != -1)
3501 min_latency += parse->priv->min_latency;
3502 if (max_latency != -1)
3503 max_latency += parse->priv->max_latency;
3504 GST_OBJECT_UNLOCK (parse);
3506 gst_query_set_latency (query, live, min_latency, max_latency);
3511 res = gst_pad_query_default (pad, parent, query);
3517 /* scans for a cluster start from @pos,
3518 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3519 static GstFlowReturn
3520 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3521 GstClockTime * time, GstClockTime * duration)
3523 GstBaseParseClass *klass;
3525 gboolean orig_drain, orig_discont;
3526 GstFlowReturn ret = GST_FLOW_OK;
3527 GstBuffer *buf = NULL;
3528 GstBaseParseFrame *sframe = NULL;
3530 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3531 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3532 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3534 klass = GST_BASE_PARSE_GET_CLASS (parse);
3536 *time = GST_CLOCK_TIME_NONE;
3537 *duration = GST_CLOCK_TIME_NONE;
3540 orig_offset = parse->priv->offset;
3541 orig_discont = parse->priv->discont;
3542 orig_drain = parse->priv->drain;
3544 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3545 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3547 /* jump elsewhere and locate next frame */
3548 parse->priv->offset = *pos;
3549 /* mark as scanning so frames don't get processed all the way */
3550 parse->priv->scanning = TRUE;
3551 ret = gst_base_parse_scan_frame (parse, klass, FALSE);
3552 parse->priv->scanning = FALSE;
3553 /* retrieve frame found during scan */
3554 sframe = parse->priv->scanned_frame;
3555 parse->priv->scanned_frame = NULL;
3557 if (ret != GST_FLOW_OK || !sframe)
3560 /* get offset first, subclass parsing might dump other stuff in there */
3561 *pos = sframe->offset;
3562 buf = sframe->buffer;
3565 /* but it should provide proper time */
3566 *time = GST_BUFFER_TIMESTAMP (buf);
3567 *duration = GST_BUFFER_DURATION (buf);
3569 GST_LOG_OBJECT (parse,
3570 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3571 GST_TIME_ARGS (*time), *pos);
3575 gst_base_parse_frame_free (sframe);
3578 parse->priv->offset = orig_offset;
3579 parse->priv->discont = orig_discont;
3580 parse->priv->drain = orig_drain;
3585 /* bisect and scan through file for frame starting before @time,
3586 * returns OK and @time/@offset if found, NONE and/or error otherwise
3587 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3588 static GstFlowReturn
3589 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3592 GstFlowReturn ret = GST_FLOW_OK;
3593 gint64 lpos, hpos, newpos;
3594 GstClockTime time, ltime, htime, newtime, dur;
3595 gboolean cont = TRUE;
3596 const GstClockTime tolerance = TARGET_DIFFERENCE;
3597 const guint chunk = 4 * 1024;
3599 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3600 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3602 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3603 GST_TIME_ARGS (*_time));
3605 /* TODO also make keyframe aware if useful some day */
3620 /* do not know at first */
3622 *_time = GST_CLOCK_TIME_NONE;
3624 /* need initial positions; start and end */
3625 lpos = parse->priv->first_frame_offset;
3626 ltime = parse->priv->first_frame_ts;
3627 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3628 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3629 return GST_FLOW_ERROR;
3631 hpos = parse->priv->upstream_size;
3633 GST_DEBUG_OBJECT (parse,
3634 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3635 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3636 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3638 /* check preconditions are satisfied;
3639 * start and end are needed, except for special case where we scan for
3640 * last frame to determine duration */
3641 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3642 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3643 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3647 /* shortcut cases */
3650 } else if (time < ltime + tolerance) {
3654 } else if (time >= htime) {
3660 while (htime > ltime && cont) {
3661 GST_LOG_OBJECT (parse,
3662 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3663 GST_TIME_ARGS (ltime));
3664 GST_LOG_OBJECT (parse,
3665 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3666 GST_TIME_ARGS (htime));
3667 if (G_UNLIKELY (time == G_MAXINT64)) {
3669 } else if (G_LIKELY (hpos > lpos)) {
3671 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3674 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3676 /* we check this case once, but not forever, so break loop */
3681 newpos = CLAMP (newpos, lpos, hpos);
3682 GST_LOG_OBJECT (parse,
3683 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3684 GST_TIME_ARGS (time), newpos);
3686 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3687 if (ret == GST_FLOW_EOS) {
3688 /* heuristic HACK */
3689 hpos = MAX (lpos, hpos - chunk);
3691 } else if (ret != GST_FLOW_OK) {
3695 if (newtime == -1 || newpos == -1) {
3696 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3700 if (G_UNLIKELY (time == G_MAXINT64)) {
3703 if (GST_CLOCK_TIME_IS_VALID (dur))
3706 } else if (newtime > time) {
3708 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3710 } else if (newtime + tolerance > time) {
3711 /* close enough undershoot */
3715 } else if (newtime < ltime) {
3716 /* so a position beyond lpos resulted in earlier time than ltime ... */
3717 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3720 /* undershoot too far */
3721 newpos += newpos == lpos ? chunk : 0;
3722 lpos = CLAMP (newpos, lpos, hpos);
3728 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3729 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3734 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3735 gboolean before, GstClockTime * _ts)
3737 gint64 bytes = 0, ts = 0;
3738 GstIndexEntry *entry = NULL;
3740 if (time == GST_CLOCK_TIME_NONE) {
3746 GST_BASE_PARSE_INDEX_LOCK (parse);
3747 if (parse->priv->index) {
3748 /* Let's check if we have an index entry for that time */
3749 entry = gst_index_get_assoc_entry (parse->priv->index,
3750 parse->priv->index_id,
3751 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3752 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3756 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3757 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3759 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3760 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3761 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3763 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3764 GST_TIME_ARGS (time));
3767 ts = GST_CLOCK_TIME_NONE;
3770 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3779 /* returns TRUE if seek succeeded */
3781 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3786 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3787 gboolean flush, update, res = TRUE, accurate;
3788 gint64 cur, stop, seekpos, seekstop;
3789 GstSegment seeksegment = { 0, };
3790 GstClockTime start_ts;
3792 gst_event_parse_seek (event, &rate, &format, &flags,
3793 &cur_type, &cur, &stop_type, &stop);
3795 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3796 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3797 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3798 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3800 /* no negative rates in push mode */
3801 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3804 if (cur_type != GST_SEEK_TYPE_SET ||
3805 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3808 /* For any format other than TIME, see if upstream handles
3809 * it directly or fail. For TIME, try upstream, but do it ourselves if
3810 * it fails upstream */
3811 if (format != GST_FORMAT_TIME) {
3812 /* default action delegates to upstream */
3816 gst_event_ref (event);
3817 if ((res = gst_pad_push_event (parse->sinkpad, event))) {
3822 /* get flush flag */
3823 flush = flags & GST_SEEK_FLAG_FLUSH;
3825 /* copy segment, we need this because we still need the old
3826 * segment when we close the current segment. */
3827 gst_segment_copy_into (&parse->segment, &seeksegment);
3829 GST_DEBUG_OBJECT (parse, "configuring seek");
3830 gst_segment_do_seek (&seeksegment, rate, format, flags,
3831 cur_type, cur, stop_type, stop, &update);
3833 /* accurate seeking implies seek tables are used to obtain position,
3834 * and the requested segment is maintained exactly, not adjusted any way */
3835 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3837 /* maybe we can be accurate for (almost) free */
3838 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3839 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3840 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3844 GstClockTime startpos = seeksegment.position;
3846 /* accurate requested, so ... seek a bit before target */
3847 if (startpos < parse->priv->lead_in_ts)
3850 startpos -= parse->priv->lead_in_ts;
3851 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3852 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3855 start_ts = seeksegment.position;
3856 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.position,
3857 GST_FORMAT_BYTES, &seekpos))
3858 goto convert_failed;
3859 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3860 GST_FORMAT_BYTES, &seekstop))
3861 goto convert_failed;
3864 GST_DEBUG_OBJECT (parse,
3865 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3867 GST_DEBUG_OBJECT (parse,
3868 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3869 seeksegment.stop, seekstop);
3871 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
3874 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3877 if (parse->srcpad) {
3878 GST_DEBUG_OBJECT (parse, "sending flush start");
3879 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3880 /* unlock upstream pull_range */
3881 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3884 gst_pad_pause_task (parse->sinkpad);
3887 /* we should now be able to grab the streaming thread because we stopped it
3888 * with the above flush/pause code */
3889 GST_PAD_STREAM_LOCK (parse->sinkpad);
3891 /* save current position */
3892 last_stop = parse->segment.position;
3893 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3896 /* now commit to new position */
3898 /* prepare for streaming again */
3900 GST_DEBUG_OBJECT (parse, "sending flush stop");
3901 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
3902 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
3903 gst_base_parse_clear_queues (parse);
3905 /* keep track of our position */
3906 seeksegment.base = gst_segment_to_running_time (&seeksegment,
3907 seeksegment.format, parse->segment.position);
3910 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3912 /* store the newsegment event so it can be sent from the streaming thread. */
3913 if (parse->priv->pending_segment)
3914 gst_event_unref (parse->priv->pending_segment);
3916 /* This will be sent later in _loop() */
3917 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
3919 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3920 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3921 ", pos = %" GST_TIME_FORMAT, format,
3922 GST_TIME_ARGS (parse->segment.start),
3923 GST_TIME_ARGS (parse->segment.stop),
3924 GST_TIME_ARGS (parse->segment.start));
3926 /* one last chance in pull mode to stay accurate;
3927 * maybe scan and subclass can find where to go */
3930 GstClockTime ts = seeksegment.position;
3932 gst_base_parse_locate_time (parse, &ts, &scanpos);
3936 /* running collected index now consists of several intervals,
3937 * so optimized check no longer possible */
3938 parse->priv->index_last_valid = FALSE;
3939 parse->priv->index_last_offset = 0;
3940 parse->priv->index_last_ts = 0;
3944 /* mark discont if we are going to stream from another position. */
3945 if (seekpos != parse->priv->offset) {
3946 GST_DEBUG_OBJECT (parse,
3947 "mark DISCONT, we did a seek to another position");
3948 parse->priv->offset = seekpos;
3949 parse->priv->last_offset = seekpos;
3950 parse->priv->seen_keyframe = FALSE;
3951 parse->priv->discont = TRUE;
3952 parse->priv->next_ts = start_ts;
3953 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3954 parse->priv->sync_offset = seekpos;
3955 parse->priv->exact_position = accurate;
3958 /* Start streaming thread if paused */
3959 gst_pad_start_task (parse->sinkpad,
3960 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3962 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3967 GstEvent *new_event;
3968 GstBaseParseSeek *seek;
3969 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
3971 /* The only thing we need to do in PUSH-mode is to send the
3972 seek event (in bytes) to upstream. Segment / flush handling happens
3973 in corresponding src event handlers */
3974 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3975 if (seekstop >= 0 && seekstop <= seekpos)
3977 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
3978 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3980 /* store segment info so its precise details can be reconstructed when
3981 * receiving newsegment;
3982 * this matters for all details when accurate seeking,
3983 * is most useful to preserve NONE stop time otherwise */
3984 seek = g_new0 (GstBaseParseSeek, 1);
3985 seek->segment = seeksegment;
3986 seek->accurate = accurate;
3987 seek->offset = seekpos;
3988 seek->start_ts = start_ts;
3989 GST_OBJECT_LOCK (parse);
3990 /* less optimal, but preserves order */
3991 parse->priv->pending_seeks =
3992 g_slist_append (parse->priv->pending_seeks, seek);
3993 GST_OBJECT_UNLOCK (parse);
3995 res = gst_pad_push_event (parse->sinkpad, new_event);
3998 GST_OBJECT_LOCK (parse);
3999 parse->priv->pending_seeks =
4000 g_slist_remove (parse->priv->pending_seeks, seek);
4001 GST_OBJECT_UNLOCK (parse);
4007 /* handled event is ours to free */
4009 gst_event_unref (event);
4015 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4021 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4027 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4033 /* Checks if bitrates are available from upstream tags so that we don't
4034 * override them later
4037 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4039 GstTagList *taglist = NULL;
4042 gst_event_parse_tag (event, &taglist);
4044 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4045 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4046 parse->priv->post_min_bitrate = FALSE;
4048 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4049 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4050 parse->priv->post_avg_bitrate = FALSE;
4052 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4053 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4054 parse->priv->post_max_bitrate = FALSE;
4060 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4062 GstBaseParse *parse = GST_BASE_PARSE (element);
4064 GST_BASE_PARSE_INDEX_LOCK (parse);
4065 if (parse->priv->index)
4066 gst_object_unref (parse->priv->index);
4068 parse->priv->index = gst_object_ref (index);
4069 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4070 &parse->priv->index_id);
4071 parse->priv->own_index = FALSE;
4073 parse->priv->index = NULL;
4075 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4079 gst_base_parse_get_index (GstElement * element)
4081 GstBaseParse *parse = GST_BASE_PARSE (element);
4082 GstIndex *result = NULL;
4084 GST_BASE_PARSE_INDEX_LOCK (parse);
4085 if (parse->priv->index)
4086 result = gst_object_ref (parse->priv->index);
4087 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4093 static GstStateChangeReturn
4094 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4096 GstBaseParse *parse;
4097 GstStateChangeReturn result;
4099 parse = GST_BASE_PARSE (element);
4101 switch (transition) {
4102 case GST_STATE_CHANGE_READY_TO_PAUSED:
4103 /* If this is our own index destroy it as the
4104 * old entries might be wrong for the new stream */
4105 GST_BASE_PARSE_INDEX_LOCK (parse);
4106 if (parse->priv->own_index) {
4107 gst_object_unref (parse->priv->index);
4108 parse->priv->index = NULL;
4109 parse->priv->own_index = FALSE;
4112 /* If no index was created, generate one */
4113 if (G_UNLIKELY (!parse->priv->index)) {
4114 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4116 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4117 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4118 &parse->priv->index_id);
4119 parse->priv->own_index = TRUE;
4121 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4127 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4129 switch (transition) {
4130 case GST_STATE_CHANGE_PAUSED_TO_READY:
4131 gst_base_parse_reset (parse);