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>.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
23 * SECTION:gstbaseparse
24 * @short_description: Base class for stream parsers
25 * @see_also: #GstBaseTransform
27 * This base class is for parser elements that process data and splits it
28 * into separate audio/video/whatever frames.
32 * <listitem><para>provides one sink pad and one source pad</para></listitem>
33 * <listitem><para>handles state changes</para></listitem>
34 * <listitem><para>can operate in pull mode or push mode</para></listitem>
35 * <listitem><para>handles seeking in both modes</para></listitem>
36 * <listitem><para>handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
38 * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
40 * <listitem><para>handles flushing</para></listitem>
43 * The purpose of this base class is to provide the basic functionality of
44 * a parser and share a lot of rather complex code.
46 * Description of the parsing mechanism:
49 * <itemizedlist><title>Set-up phase</title>
51 * GstBaseParse class calls @set_sink_caps to inform the subclass about
52 * incoming sinkpad caps. Subclass should set the srcpad caps accordingly.
55 * GstBaseParse calls @start to inform subclass that data processing is
59 * At least at this point subclass needs to tell the GstBaseParse class
60 * how big data chunks it wants to receive (min_frame_size). It can do
61 * this with gst_base_parse_set_min_frame_size().
64 * GstBaseParse class sets up appropriate data passing mode (pull/push)
65 * and starts to process the data.
71 * <title>Parsing phase</title>
73 * GstBaseParse gathers at least min_frame_size bytes of data either
74 * by pulling it from upstream or collecting buffers in an internal
78 * A buffer of (at least) min_frame_size bytes is passed to subclass with
79 * @check_valid_frame. Subclass checks the contents and returns TRUE
80 * if the buffer contains a valid frame. It also needs to set the
81 * @framesize according to the detected frame size. If buffer didn't
82 * contain a valid frame, this call must return FALSE and optionally
83 * set the @skipsize value to inform base class that how many bytes
84 * it needs to skip in order to find a valid frame. @framesize can always
85 * indicate a new minimum for current frame parsing. The passed buffer
86 * is read-only. Note that @check_valid_frame might receive any small
87 * amount of input data when leftover data is being drained (e.g. at EOS).
90 * After valid frame is found, it will be passed again to subclass with
91 * @parse_frame call. Now subclass is responsible for parsing the
92 * frame contents and setting the caps, and buffer metadata (e.g.
93 * buffer timestamp and duration, or keyframe if applicable).
94 * (although the latter can also be done by GstBaseParse if it is
95 * appropriately configured, see below). Frame is provided with
96 * timestamp derived from upstream (as much as generally possible),
97 * duration obtained from configuration (see below), and offset
98 * if meaningful (in pull mode).
101 * Finally the buffer can be pushed downstream and the parsing loop starts
102 * over again. Just prior to actually pushing the buffer in question,
103 * it is passed to @pre_push_buffer which gives subclass yet one
104 * last chance to examine buffer metadata, or to send some custom (tag)
105 * events, or to perform custom (segment) filtering.
108 * During the parsing process GstBaseParseClass will handle both srcpad
109 * and sinkpad events. They will be passed to subclass if @event or
110 * @src_event callbacks have been provided.
115 * <itemizedlist><title>Shutdown phase</title>
117 * GstBaseParse class calls @stop to inform the subclass that data
118 * parsing will be stopped.
124 * Subclass is responsible for providing pad template caps for
125 * source and sink pads. The pads need to be named "sink" and "src". It also
126 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
127 * when base class calls subclass' @set_sink_caps function).
129 * This base class uses #GST_FORMAT_DEFAULT as a meaning of frames. So,
130 * subclass conversion routine needs to know that conversion from
131 * #GST_FORMAT_TIME to #GST_FORMAT_DEFAULT must return the
132 * frame number that can be found from the given byte position.
134 * GstBaseParse uses subclasses conversion methods also for seeking (or
135 * otherwise uses its own default one, see also below).
137 * Subclass @start and @stop functions will be called to inform the beginning
138 * and end of data processing.
140 * Things that subclass need to take care of:
142 * <listitem><para>Provide pad templates</para></listitem>
144 * Fixate the source pad caps when appropriate
147 * Inform base class how big data chunks should be retrieved. This is
148 * done with gst_base_parse_set_min_frame_size() function.
151 * Examine data chunks passed to subclass with @check_valid_frame
152 * and tell if they contain a valid frame
155 * Set the caps and timestamp to frame that is passed to subclass with
156 * @parse_frame function.
158 * <listitem><para>Provide conversion functions</para></listitem>
160 * Update the duration information with gst_base_parse_set_duration()
163 * Optionally passthrough using gst_base_parse_set_passthrough()
166 * Configure various baseparse parameters using
167 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
168 * and gst_base_parse_set_frame_rate().
171 * In particular, if subclass is unable to determine a duration, but
172 * parsing (or specs) yields a frames per seconds rate, then this can be
173 * provided to GstBaseParse to enable it to cater for
174 * buffer time metadata (which will be taken from upstream as much as
175 * possible). Internally keeping track of frame durations and respective
176 * sizes that have been pushed provides GstBaseParse with an estimated
177 * bitrate. A default @convert (used if not overriden) will then use these
178 * rates to perform obvious conversions. These rates are also used to
179 * update (estimated) duration at regular frame intervals.
186 * - In push mode provide a queue of adapter-"queued" buffers for upstream
188 * - Queue buffers/events until caps are set
198 #include <gst/base/gstadapter.h>
200 #include "gstbaseparse.h"
202 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
204 #define MIN_FRAMES_TO_POST_BITRATE 10
205 #define TARGET_DIFFERENCE (20 * GST_SECOND)
207 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
208 #define GST_CAT_DEFAULT gst_base_parse_debug
210 /* Supported formats */
211 static const GstFormat fmtlist[] = {
218 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
219 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
221 struct _GstBaseParsePrivate
223 GstActivateMode pad_mode;
228 GstFormat duration_fmt;
229 gint64 estimated_duration;
231 guint min_frame_size;
232 gboolean passthrough;
234 gboolean has_timing_info;
235 guint fps_num, fps_den;
236 gint update_interval;
238 guint lead_in, lead_out;
239 GstClockTime lead_in_ts, lead_out_ts;
247 GstClockTime next_ts;
248 GstClockTime prev_ts;
249 GstClockTime frame_duration;
250 gboolean seen_keyframe;
255 guint64 data_bytecount;
256 guint64 acc_duration;
257 GstClockTime first_frame_ts;
258 gint64 first_frame_offset;
260 gboolean post_min_bitrate;
261 gboolean post_avg_bitrate;
262 gboolean post_max_bitrate;
266 guint posted_avg_bitrate;
268 GList *pending_events;
270 /* frames/buffers that are queued and ready to go on OK */
271 GQueue queued_frames;
275 /* index entry storage, either ours or provided */
279 GStaticMutex index_lock;
281 /* seek table entries only maintained if upstream is BYTE seekable */
282 gboolean upstream_seekable;
283 gboolean upstream_has_duration;
284 gint64 upstream_size;
285 /* minimum distance between two index entries */
286 GstClockTimeDiff idx_interval;
287 /* ts and offset of last entry added */
288 GstClockTime index_last_ts;
289 gint64 index_last_offset;
290 gboolean index_last_valid;
292 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
293 gboolean exact_position;
294 /* seek events are temporarily kept to match them with newsegments */
295 GSList *pending_seeks;
297 /* reverse playback */
298 GSList *buffers_pending;
299 GSList *buffers_queued;
300 GSList *buffers_send;
301 GstClockTime last_ts;
304 /* Newsegment event to be sent after SEEK */
305 GstEvent *pending_segment;
307 /* Segment event that closes the running segment prior to SEEK */
308 GstEvent *close_segment;
311 typedef struct _GstBaseParseSeek
316 GstClockTime start_ts;
319 static GstElementClass *parent_class = NULL;
321 static void gst_base_parse_class_init (GstBaseParseClass * klass);
322 static void gst_base_parse_init (GstBaseParse * parse,
323 GstBaseParseClass * klass);
326 gst_base_parse_get_type (void)
328 static volatile gsize base_parse_type = 0;
330 if (g_once_init_enter (&base_parse_type)) {
331 static const GTypeInfo base_parse_info = {
332 sizeof (GstBaseParseClass),
333 (GBaseInitFunc) NULL,
334 (GBaseFinalizeFunc) NULL,
335 (GClassInitFunc) gst_base_parse_class_init,
338 sizeof (GstBaseParse),
340 (GInstanceInitFunc) gst_base_parse_init,
344 _type = g_type_register_static (GST_TYPE_ELEMENT,
345 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
346 g_once_init_leave (&base_parse_type, _type);
348 return (GType) base_parse_type;
351 static void gst_base_parse_finalize (GObject * object);
353 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
354 GstStateChange transition);
355 static void gst_base_parse_reset (GstBaseParse * parse);
357 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
358 static GstIndex *gst_base_parse_get_index (GstElement * element);
360 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad);
361 static gboolean gst_base_parse_sink_activate_push (GstPad * pad,
363 static gboolean gst_base_parse_sink_activate_pull (GstPad * pad,
365 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
367 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
369 static gboolean gst_base_parse_src_event (GstPad * pad, GstEvent * event);
370 static gboolean gst_base_parse_sink_event (GstPad * pad, GstEvent * event);
371 static gboolean gst_base_parse_query (GstPad * pad, GstQuery ** query);
372 static gboolean gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps);
373 static const GstQueryType *gst_base_parse_get_querytypes (GstPad * pad);
375 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstBuffer * buffer);
376 static void gst_base_parse_loop (GstPad * pad);
378 static gboolean gst_base_parse_check_frame (GstBaseParse * parse,
379 GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
380 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
381 GstBaseParseFrame * frame);
383 static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
386 static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
389 static void gst_base_parse_drain (GstBaseParse * parse);
391 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
392 gboolean post_min, gboolean post_avg, gboolean post_max);
394 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
395 GstClockTime time, gboolean before, GstClockTime * _ts);
396 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
397 GstClockTime * _time, gint64 * _offset);
399 static GstFlowReturn gst_base_parse_process_fragment (GstBaseParse * parse,
402 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
405 gst_base_parse_clear_queues (GstBaseParse * parse)
407 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
408 g_slist_free (parse->priv->buffers_queued);
409 parse->priv->buffers_queued = NULL;
410 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
412 g_slist_free (parse->priv->buffers_pending);
413 parse->priv->buffers_pending = NULL;
414 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
415 g_slist_free (parse->priv->buffers_send);
416 parse->priv->buffers_send = NULL;
420 gst_base_parse_finalize (GObject * object)
422 GstBaseParse *parse = GST_BASE_PARSE (object);
425 g_object_unref (parse->priv->adapter);
427 if (parse->priv->pending_segment) {
428 p_ev = &parse->priv->pending_segment;
429 gst_event_replace (p_ev, NULL);
431 if (parse->priv->close_segment) {
432 p_ev = &parse->priv->close_segment;
433 gst_event_replace (p_ev, NULL);
436 if (parse->priv->cache) {
437 gst_buffer_unref (parse->priv->cache);
438 parse->priv->cache = NULL;
441 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
443 g_list_free (parse->priv->pending_events);
444 parse->priv->pending_events = NULL;
446 g_queue_foreach (&parse->priv->queued_frames,
447 (GFunc) gst_base_parse_frame_free, NULL);
448 g_queue_clear (&parse->priv->queued_frames);
450 if (parse->priv->index) {
451 gst_object_unref (parse->priv->index);
452 parse->priv->index = NULL;
455 g_static_mutex_free (&parse->priv->index_lock);
457 gst_base_parse_clear_queues (parse);
459 G_OBJECT_CLASS (parent_class)->finalize (object);
463 gst_base_parse_class_init (GstBaseParseClass * klass)
465 GObjectClass *gobject_class;
466 GstElementClass *gstelement_class;
468 gobject_class = G_OBJECT_CLASS (klass);
469 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
470 parent_class = g_type_class_peek_parent (klass);
471 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
473 gstelement_class = (GstElementClass *) klass;
474 gstelement_class->change_state =
475 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
476 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
477 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
479 /* Default handlers */
480 klass->check_valid_frame = gst_base_parse_check_frame;
481 klass->parse_frame = gst_base_parse_parse_frame;
482 klass->src_event = gst_base_parse_src_eventfunc;
483 klass->convert = gst_base_parse_convert_default;
485 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
486 "baseparse element");
490 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
492 GstPadTemplate *pad_template;
494 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
496 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
499 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
500 g_return_if_fail (pad_template != NULL);
501 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
502 gst_pad_set_event_function (parse->sinkpad,
503 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
504 gst_pad_set_setcaps_function (parse->sinkpad,
505 GST_DEBUG_FUNCPTR (gst_base_parse_sink_setcaps));
506 gst_pad_set_chain_function (parse->sinkpad,
507 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
508 gst_pad_set_activate_function (parse->sinkpad,
509 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
510 gst_pad_set_activatepush_function (parse->sinkpad,
511 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_push));
512 gst_pad_set_activatepull_function (parse->sinkpad,
513 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_pull));
514 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
516 GST_DEBUG_OBJECT (parse, "sinkpad created");
519 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
520 g_return_if_fail (pad_template != NULL);
521 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
522 gst_pad_set_event_function (parse->srcpad,
523 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
524 gst_pad_set_query_type_function (parse->srcpad,
525 GST_DEBUG_FUNCPTR (gst_base_parse_get_querytypes));
526 gst_pad_set_query_function (parse->srcpad,
527 GST_DEBUG_FUNCPTR (gst_base_parse_query));
528 gst_pad_use_fixed_caps (parse->srcpad);
529 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
530 GST_DEBUG_OBJECT (parse, "src created");
532 g_queue_init (&parse->priv->queued_frames);
534 parse->priv->adapter = gst_adapter_new ();
536 parse->priv->pad_mode = GST_ACTIVATE_NONE;
538 g_static_mutex_init (&parse->priv->index_lock);
541 gst_base_parse_reset (parse);
542 GST_DEBUG_OBJECT (parse, "init ok");
545 static GstBaseParseFrame *
546 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
548 GstBaseParseFrame *copy;
550 copy = g_slice_dup (GstBaseParseFrame, frame);
551 copy->buffer = gst_buffer_ref (frame->buffer);
552 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
554 GST_TRACE ("copied frame %p -> %p", frame, copy);
560 gst_base_parse_frame_free (GstBaseParseFrame * frame)
562 GST_TRACE ("freeing frame %p", frame);
565 gst_buffer_unref (frame->buffer);
566 frame->buffer = NULL;
569 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC))
570 g_slice_free (GstBaseParseFrame, frame);
574 gst_base_parse_frame_get_type (void)
576 static volatile gsize frame_type = 0;
578 if (g_once_init_enter (&frame_type)) {
581 _type = g_boxed_type_register_static ("GstBaseParseFrame",
582 (GBoxedCopyFunc) gst_base_parse_frame_copy,
583 (GBoxedFreeFunc) gst_base_parse_frame_free);
584 g_once_init_leave (&frame_type, _type);
586 return (GType) frame_type;
590 * gst_base_parse_frame_init:
591 * @frame: #GstBaseParseFrame.
593 * Sets a #GstBaseParseFrame to initial state. Currently this means
594 * all public fields are zero-ed and a private flag is set to make
595 * sure gst_base_parse_frame_free() only frees the contents but not
596 * the actual frame. Use this function to initialise a #GstBaseParseFrame
597 * allocated on the stack.
602 gst_base_parse_frame_init (GstBaseParseFrame * frame)
604 memset (frame, 0, sizeof (GstBaseParseFrame));
605 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
606 GST_TRACE ("inited frame %p", frame);
610 * gst_base_parse_frame_new:
611 * @buffer: (transfer none): a #GstBuffer
613 * @overhead: number of bytes in this frame which should be counted as
614 * metadata overhead, ie. not used to calculate the average bitrate.
615 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
617 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
618 * elements written in C should usually allocate the frame on the stack and
619 * then use gst_base_parse_frame_init() to initialise it.
621 * Returns: a newly-allocated #GstBaseParseFrame. Free with
622 * gst_base_parse_frame_free() when no longer needed, unless you gave
623 * away ownership to gst_base_parse_push_frame().
628 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
631 GstBaseParseFrame *frame;
633 frame = g_slice_new0 (GstBaseParseFrame);
634 frame->buffer = gst_buffer_ref (buffer);
636 GST_TRACE ("created frame %p", frame);
641 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
644 gst_buffer_replace (&frame->buffer, buf);
648 /* set flags one by one for clarity */
649 if (G_UNLIKELY (parse->priv->drain))
650 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
652 /* losing sync is pretty much a discont (and vice versa), no ? */
653 if (G_UNLIKELY (parse->priv->discont))
654 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
658 gst_base_parse_reset (GstBaseParse * parse)
660 GST_OBJECT_LOCK (parse);
661 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
662 parse->priv->duration = -1;
663 parse->priv->min_frame_size = 1;
664 parse->priv->discont = TRUE;
665 parse->priv->flushing = FALSE;
666 parse->priv->offset = 0;
667 parse->priv->sync_offset = 0;
668 parse->priv->update_interval = -1;
669 parse->priv->fps_num = parse->priv->fps_den = 0;
670 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
671 parse->priv->lead_in = parse->priv->lead_out = 0;
672 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
673 parse->priv->bitrate = 0;
674 parse->priv->framecount = 0;
675 parse->priv->bytecount = 0;
676 parse->priv->acc_duration = 0;
677 parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
678 parse->priv->first_frame_offset = -1;
679 parse->priv->estimated_duration = -1;
680 parse->priv->next_ts = 0;
681 parse->priv->syncable = TRUE;
682 parse->priv->passthrough = FALSE;
683 parse->priv->has_timing_info = FALSE;
684 parse->priv->post_min_bitrate = TRUE;
685 parse->priv->post_avg_bitrate = TRUE;
686 parse->priv->post_max_bitrate = TRUE;
687 parse->priv->min_bitrate = G_MAXUINT;
688 parse->priv->max_bitrate = 0;
689 parse->priv->avg_bitrate = 0;
690 parse->priv->posted_avg_bitrate = 0;
692 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
693 parse->priv->index_last_offset = -1;
694 parse->priv->index_last_valid = TRUE;
695 parse->priv->upstream_seekable = FALSE;
696 parse->priv->upstream_size = 0;
697 parse->priv->upstream_has_duration = FALSE;
698 parse->priv->idx_interval = 0;
699 parse->priv->exact_position = TRUE;
700 parse->priv->seen_keyframe = FALSE;
702 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
703 parse->priv->last_offset = 0;
705 if (parse->priv->pending_segment) {
706 gst_event_unref (parse->priv->pending_segment);
707 parse->priv->pending_segment = NULL;
710 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
712 g_list_free (parse->priv->pending_events);
713 parse->priv->pending_events = NULL;
715 if (parse->priv->cache) {
716 gst_buffer_unref (parse->priv->cache);
717 parse->priv->cache = NULL;
720 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
721 g_slist_free (parse->priv->pending_seeks);
722 parse->priv->pending_seeks = NULL;
723 GST_OBJECT_UNLOCK (parse);
726 /* gst_base_parse_check_frame:
727 * @parse: #GstBaseParse.
728 * @buffer: GstBuffer.
729 * @framesize: This will be set to tell the found frame size in bytes.
730 * @skipsize: Output parameter that tells how much data needs to be skipped
731 * in order to find the following frame header.
733 * Default callback for check_valid_frame.
735 * Returns: Always TRUE.
738 gst_base_parse_check_frame (GstBaseParse * parse,
739 GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
741 *framesize = gst_buffer_get_size (frame->buffer);
747 /* gst_base_parse_parse_frame:
748 * @parse: #GstBaseParse.
749 * @buffer: #GstBuffer.
751 * Default callback for parse_frame.
754 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
756 GstBuffer *buffer = frame->buffer;
758 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
759 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
760 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
762 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
763 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
764 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
769 /* gst_base_parse_convert:
770 * @parse: #GstBaseParse.
771 * @src_format: #GstFormat describing the source format.
772 * @src_value: Source value to be converted.
773 * @dest_format: #GstFormat defining the converted format.
774 * @dest_value: Pointer where the conversion result will be put.
776 * Converts using configured "convert" vmethod in #GstBaseParse class.
778 * Returns: TRUE if conversion was successful.
781 gst_base_parse_convert (GstBaseParse * parse,
782 GstFormat src_format,
783 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
785 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
788 g_return_val_if_fail (dest_value != NULL, FALSE);
793 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
795 #ifndef GST_DISABLE_GST_DEBUG
798 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
799 GST_LOG_OBJECT (parse,
800 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
801 GST_TIME_ARGS (src_value), *dest_value);
802 } else if (dest_format == GST_FORMAT_TIME &&
803 src_format == GST_FORMAT_BYTES) {
804 GST_LOG_OBJECT (parse,
805 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
806 src_value, GST_TIME_ARGS (*dest_value));
808 GST_LOG_OBJECT (parse,
809 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
810 GST_STR_NULL (gst_format_get_name (src_format)),
811 GST_STR_NULL (gst_format_get_name (dest_format)),
812 src_value, *dest_value);
815 GST_DEBUG_OBJECT (parse, "conversion failed");
823 /* gst_base_parse_sink_event:
824 * @pad: #GstPad that received the event.
825 * @event: #GstEvent to be handled.
827 * Handler for sink pad events.
829 * Returns: TRUE if the event was handled.
832 gst_base_parse_sink_event (GstPad * pad, GstEvent * event)
835 GstBaseParseClass *bclass;
836 gboolean handled = FALSE;
839 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
840 bclass = GST_BASE_PARSE_GET_CLASS (parse);
842 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
843 GST_EVENT_TYPE_NAME (event));
845 /* Cache all events except EOS, SEGMENT and FLUSH_STOP if we have a
847 if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
848 && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT
849 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
850 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
852 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
853 /* See if any bitrate tags were posted */
854 gst_base_parse_handle_tag (parse, event);
856 parse->priv->pending_events =
857 g_list_append (parse->priv->pending_events, event);
861 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
862 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
863 /* We've not posted bitrate tags yet - do so now */
864 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
867 handled = bclass->event (parse, event);
870 handled = gst_base_parse_sink_eventfunc (parse, event);
873 ret = gst_pad_event_default (pad, event);
876 gst_object_unref (parse);
877 GST_DEBUG_OBJECT (parse, "event handled");
882 /* gst_base_parse_sink_eventfunc:
883 * @parse: #GstBaseParse.
884 * @event: #GstEvent to be handled.
886 * Element-level event handler function.
888 * The event will be unreffed only if it has been handled and this
889 * function returns %TRUE
891 * Returns: %TRUE if the event was handled and not need forwarding.
894 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
896 gboolean handled = FALSE;
899 switch (GST_EVENT_TYPE (event)) {
900 case GST_EVENT_SEGMENT:
902 const GstSegment *in_segment;
903 GstSegment out_segment;
904 gint64 offset = 0, next_ts;
907 gdouble rate, applied_rate;
909 gint64 start, stop, pos, next_ts;
913 in_segment = gst_event_get_segment (event);
914 gst_segment_init (&out_segment, GST_FORMAT_TIME);
916 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
918 if (in_segment->format == GST_FORMAT_BYTES) {
919 GstBaseParseSeek *seek = NULL;
922 /* stop time is allowed to be open-ended, but not start & pos */
923 offset = in_segment->time;
925 GST_OBJECT_LOCK (parse);
926 for (node = parse->priv->pending_seeks; node; node = node->next) {
927 GstBaseParseSeek *tmp = node->data;
929 if (tmp->offset == offset) {
934 parse->priv->pending_seeks =
935 g_slist_remove (parse->priv->pending_seeks, seek);
936 GST_OBJECT_UNLOCK (parse);
939 GST_DEBUG_OBJECT (parse,
940 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
941 seek->accurate ? " accurate" : "", &seek->segment);
943 out_segment.start = seek->segment.start;
944 out_segment.stop = seek->segment.stop;
945 out_segment.time = seek->segment.start;
947 next_ts = seek->start_ts;
948 parse->priv->exact_position = seek->accurate;
951 /* best attempt convert */
952 /* as these are only estimates, stop is kept open-ended to avoid
953 * premature cutting */
954 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
955 GST_FORMAT_TIME, (gint64 *) & next_ts);
957 out_segment.start = next_ts;
958 out_segment.stop = GST_CLOCK_TIME_NONE;
959 out_segment.time = next_ts;
961 parse->priv->exact_position = (in_segment->start == 0);
964 gst_event_unref (event);
966 event = gst_event_new_segment (&out_segment);
968 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
969 GST_SEGMENT_FORMAT, in_segment);
971 } else if (in_segment->format != GST_FORMAT_TIME) {
972 /* Unknown incoming segment format. Output a default open-ended
974 gst_event_unref (event);
976 out_segment.start = 0;
977 out_segment.stop = GST_CLOCK_TIME_NONE;;
978 out_segment.time = 0;;
980 event = gst_event_new_segment (&out_segment);
984 /* not considered BYTE seekable if it is talking to us in TIME,
985 * whatever else it might claim */
986 parse->priv->upstream_seekable = FALSE;
987 next_ts = in_segment->start;
990 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
993 gst_segment_set_newsegment (&parse->segment, update, rate,
994 applied_rate, format, start, stop, start);
997 /* save the segment for later, right before we push a new buffer so that
998 * the caps are fixed and the next linked element can receive
1000 eventp = &parse->priv->pending_segment;
1001 gst_event_replace (eventp, event);
1002 gst_event_unref (event);
1005 /* but finish the current segment */
1006 GST_DEBUG_OBJECT (parse, "draining current segment");
1007 if (in_segment->rate > 0.0)
1008 gst_base_parse_drain (parse);
1010 gst_base_parse_process_fragment (parse, FALSE);
1011 gst_adapter_clear (parse->priv->adapter);
1013 parse->priv->offset = offset;
1014 parse->priv->sync_offset = offset;
1015 parse->priv->next_ts = next_ts;
1016 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1017 parse->priv->discont = TRUE;
1018 parse->priv->seen_keyframe = FALSE;
1022 case GST_EVENT_FLUSH_START:
1023 parse->priv->flushing = TRUE;
1024 handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
1026 gst_event_unref (event);
1027 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1028 GST_PAD_STREAM_LOCK (parse->srcpad);
1029 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1033 case GST_EVENT_FLUSH_STOP:
1034 gst_adapter_clear (parse->priv->adapter);
1035 gst_base_parse_clear_queues (parse);
1036 parse->priv->flushing = FALSE;
1037 parse->priv->discont = TRUE;
1038 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1042 if (parse->segment.rate > 0.0)
1043 gst_base_parse_drain (parse);
1045 gst_base_parse_process_fragment (parse, FALSE);
1047 /* If we STILL have zero frames processed, fire an error */
1048 if (parse->priv->framecount == 0) {
1049 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1050 ("No valid frames found before end of stream"), (NULL));
1052 /* newsegment before eos */
1053 if (parse->priv->pending_segment) {
1054 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1055 parse->priv->pending_segment = NULL;
1067 /* gst_base_parse_src_event:
1068 * @pad: #GstPad that received the event.
1069 * @event: #GstEvent that was received.
1071 * Handler for source pad events.
1073 * Returns: TRUE if the event was handled.
1076 gst_base_parse_src_event (GstPad * pad, GstEvent * event)
1078 GstBaseParse *parse;
1079 GstBaseParseClass *bclass;
1080 gboolean handled = FALSE;
1081 gboolean ret = TRUE;
1083 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
1084 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1086 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1087 GST_EVENT_TYPE_NAME (event));
1089 if (bclass->src_event)
1090 handled = bclass->src_event (parse, event);
1093 ret = gst_pad_event_default (pad, event);
1095 gst_object_unref (parse);
1100 gst_base_parse_is_seekable (GstBaseParse * parse)
1102 /* FIXME: could do more here, e.g. check index or just send data from 0
1103 * in pull mode and let decoder/sink clip */
1104 return parse->priv->syncable;
1107 /* gst_base_parse_src_eventfunc:
1108 * @parse: #GstBaseParse.
1109 * @event: #GstEvent that was received.
1111 * Default srcpad event handler.
1113 * Returns: TRUE if the event was handled and can be dropped.
1116 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1118 gboolean handled = FALSE;
1120 switch (GST_EVENT_TYPE (event)) {
1121 case GST_EVENT_SEEK:
1123 if (gst_base_parse_is_seekable (parse)) {
1124 handled = gst_base_parse_handle_seek (parse, event);
1136 * gst_base_parse_convert_default:
1137 * @parse: #GstBaseParse.
1138 * @src_format: #GstFormat describing the source format.
1139 * @src_value: Source value to be converted.
1140 * @dest_format: #GstFormat defining the converted format.
1141 * @dest_value: Pointer where the conversion result will be put.
1143 * Default implementation of "convert" vmethod in #GstBaseParse class.
1145 * Returns: TRUE if conversion was successful.
1150 gst_base_parse_convert_default (GstBaseParse * parse,
1151 GstFormat src_format,
1152 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1154 gboolean ret = FALSE;
1155 guint64 bytes, duration;
1157 if (G_UNLIKELY (src_format == dest_format)) {
1158 *dest_value = src_value;
1162 if (G_UNLIKELY (src_value == -1)) {
1167 if (G_UNLIKELY (src_value == 0)) {
1172 /* need at least some frames */
1173 if (!parse->priv->framecount)
1176 duration = parse->priv->acc_duration / GST_MSECOND;
1177 bytes = parse->priv->bytecount;
1179 if (G_UNLIKELY (!duration || !bytes))
1182 if (src_format == GST_FORMAT_BYTES) {
1183 if (dest_format == GST_FORMAT_TIME) {
1184 /* BYTES -> TIME conversion */
1185 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1186 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1187 *dest_value *= GST_MSECOND;
1188 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1189 *dest_value / GST_MSECOND);
1192 } else if (src_format == GST_FORMAT_TIME) {
1193 if (dest_format == GST_FORMAT_BYTES) {
1194 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1195 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1197 GST_DEBUG_OBJECT (parse,
1198 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1199 src_value / GST_MSECOND, *dest_value);
1202 } else if (src_format == GST_FORMAT_DEFAULT) {
1203 /* DEFAULT == frame-based */
1204 if (dest_format == GST_FORMAT_TIME) {
1205 if (parse->priv->fps_den) {
1206 *dest_value = gst_util_uint64_scale (src_value,
1207 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1210 } else if (dest_format == GST_FORMAT_BYTES) {
1218 gst_base_parse_update_duration (GstBaseParse * baseparse)
1221 GstBaseParse *parse;
1223 parse = GST_BASE_PARSE (baseparse);
1225 peer = gst_pad_get_peer (parse->sinkpad);
1227 GstFormat pformat = GST_FORMAT_BYTES;
1228 gboolean qres = FALSE;
1229 gint64 ptot, dest_value;
1231 qres = gst_pad_query_duration (peer, &pformat, &ptot);
1232 gst_object_unref (GST_OBJECT (peer));
1234 if (gst_base_parse_convert (parse, pformat, ptot,
1235 GST_FORMAT_TIME, &dest_value)) {
1236 parse->priv->estimated_duration = dest_value;
1237 GST_LOG_OBJECT (parse,
1238 "updated estimated duration to %" GST_TIME_FORMAT,
1239 GST_TIME_ARGS (dest_value));
1246 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1247 gboolean post_avg, gboolean post_max)
1249 GstTagList *taglist = NULL;
1251 if (post_min && parse->priv->post_min_bitrate) {
1252 taglist = gst_tag_list_new ();
1254 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1255 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1258 if (post_avg && parse->priv->post_avg_bitrate) {
1259 if (taglist == NULL)
1260 taglist = gst_tag_list_new ();
1262 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1263 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1264 parse->priv->avg_bitrate, NULL);
1267 if (post_max && parse->priv->post_max_bitrate) {
1268 if (taglist == NULL)
1269 taglist = gst_tag_list_new ();
1271 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1272 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1275 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1276 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1277 parse->priv->max_bitrate);
1279 if (taglist != NULL) {
1280 gst_element_found_tags_for_pad (GST_ELEMENT_CAST (parse), parse->srcpad,
1285 /* gst_base_parse_update_bitrates:
1286 * @parse: #GstBaseParse.
1287 * @buffer: Current frame as a #GstBuffer
1289 * Keeps track of the minimum and maximum bitrates, and also maintains a
1290 * running average bitrate of the stream so far.
1293 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1295 /* Only update the tag on a 10 kbps delta */
1296 static const gint update_threshold = 10000;
1298 guint64 data_len, frame_dur;
1299 gint overhead, frame_bitrate, old_avg_bitrate;
1300 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1301 GstBuffer *buffer = frame->buffer;
1303 overhead = frame->overhead;
1307 data_len = gst_buffer_get_size (buffer) - overhead;
1308 parse->priv->data_bytecount += data_len;
1310 /* duration should be valid by now,
1311 * either set by subclass or maybe based on fps settings */
1312 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1313 /* Calculate duration of a frame from buffer properties */
1314 frame_dur = GST_BUFFER_DURATION (buffer);
1315 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1316 parse->priv->acc_duration;
1319 /* No way to figure out frame duration (is this even possible?) */
1323 /* override if subclass provided bitrate, e.g. metadata based */
1324 if (parse->priv->bitrate) {
1325 parse->priv->avg_bitrate = parse->priv->bitrate;
1326 /* spread this (confirmed) info ASAP */
1327 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1328 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1332 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1336 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1337 parse->priv->avg_bitrate);
1339 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1341 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1342 /* always post all at threshold time */
1343 update_min = update_max = update_avg = TRUE;
1346 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1347 if (frame_bitrate < parse->priv->min_bitrate) {
1348 parse->priv->min_bitrate = frame_bitrate;
1352 if (frame_bitrate > parse->priv->max_bitrate) {
1353 parse->priv->max_bitrate = frame_bitrate;
1357 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1358 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1359 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1364 if ((update_min || update_avg || update_max))
1365 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1367 /* If average bitrate changes that much and no valid (time) duration provided,
1368 * then post a new duration message so applications can update their cached
1370 if (update_avg && !(parse->priv->duration_fmt == GST_FORMAT_TIME &&
1371 GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
1372 gst_element_post_message (GST_ELEMENT (parse),
1373 gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
1380 * gst_base_parse_add_index_entry:
1381 * @parse: #GstBaseParse.
1382 * @offset: offset of entry
1383 * @ts: timestamp associated with offset
1384 * @key: whether entry refers to keyframe
1385 * @force: add entry disregarding sanity checks
1387 * Adds an entry to the index associating @offset to @ts. It is recommended
1388 * to only add keyframe entries. @force allows to bypass checks, such as
1389 * whether the stream is (upstream) seekable, another entry is already "close"
1390 * to the new entry, etc.
1392 * Returns: #gboolean indicating whether entry was added
1397 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1398 GstClockTime ts, gboolean key, gboolean force)
1400 gboolean ret = FALSE;
1401 GstIndexAssociation associations[2];
1403 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1404 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1406 if (G_LIKELY (!force)) {
1408 if (!parse->priv->upstream_seekable) {
1409 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1413 /* FIXME need better helper data structure that handles these issues
1414 * related to ongoing collecting of index entries */
1415 if (parse->priv->index_last_offset >= (gint64) offset) {
1416 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1417 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1421 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1422 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1423 parse->priv->idx_interval) {
1424 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1425 GST_TIME_ARGS (parse->priv->index_last_ts));
1429 /* if last is not really the last one */
1430 if (!parse->priv->index_last_valid) {
1431 GstClockTime prev_ts;
1433 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1434 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1435 GST_DEBUG_OBJECT (parse,
1436 "entry too close to existing entry %" GST_TIME_FORMAT,
1437 GST_TIME_ARGS (prev_ts));
1438 parse->priv->index_last_offset = offset;
1439 parse->priv->index_last_ts = ts;
1445 associations[0].format = GST_FORMAT_TIME;
1446 associations[0].value = ts;
1447 associations[1].format = GST_FORMAT_BYTES;
1448 associations[1].value = offset;
1450 /* index might change on-the-fly, although that would be nutty app ... */
1451 g_static_mutex_lock (&parse->priv->index_lock);
1452 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1453 (key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_DELTA_UNIT,
1454 2, (const GstIndexAssociation *) &associations);
1455 g_static_mutex_unlock (&parse->priv->index_lock);
1458 parse->priv->index_last_offset = offset;
1459 parse->priv->index_last_ts = ts;
1468 /* check for seekable upstream, above and beyond a mere query */
1470 gst_base_parse_check_seekability (GstBaseParse * parse)
1473 gboolean seekable = FALSE;
1474 gint64 start = -1, stop = -1;
1475 guint idx_interval = 0;
1477 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1478 if (!gst_pad_peer_query (parse->sinkpad, &query)) {
1479 GST_DEBUG_OBJECT (parse, "seeking query failed");
1483 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1485 /* try harder to query upstream size if we didn't get it the first time */
1486 if (seekable && stop == -1) {
1487 GstFormat fmt = GST_FORMAT_BYTES;
1489 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1490 gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop);
1493 /* if upstream doesn't know the size, it's likely that it's not seekable in
1494 * practice even if it technically may be seekable */
1495 if (seekable && (start != 0 || stop <= start)) {
1496 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1500 /* let's not put every single frame into our index */
1502 if (stop < 10 * 1024 * 1024)
1504 else if (stop < 100 * 1024 * 1024)
1507 idx_interval = 1000;
1511 gst_query_unref (query);
1513 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1514 G_GUINT64_FORMAT ")", seekable, start, stop);
1515 parse->priv->upstream_seekable = seekable;
1516 parse->priv->upstream_size = seekable ? stop : 0;
1518 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1519 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1522 /* some misc checks on upstream */
1524 gst_base_parse_check_upstream (GstBaseParse * parse)
1526 GstFormat fmt = GST_FORMAT_TIME;
1529 if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
1530 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1531 /* upstream has one, accept it also, and no further updates */
1532 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1533 parse->priv->upstream_has_duration = TRUE;
1536 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1537 parse->priv->upstream_has_duration);
1540 /* checks src caps to determine if dealing with audio or video */
1541 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1543 gst_base_parse_check_media (GstBaseParse * parse)
1548 caps = gst_pad_get_current_caps (parse->srcpad);
1549 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1550 parse->priv->is_video =
1551 g_str_has_prefix (gst_structure_get_name (s), "video");
1553 /* historical default */
1554 parse->priv->is_video = FALSE;
1557 gst_caps_unref (caps);
1559 GST_DEBUG_OBJECT (parse, "media is video == %d", parse->priv->is_video);
1562 /* takes ownership of frame */
1564 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1566 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1567 /* frame allocated on the heap, we can just take ownership */
1568 g_queue_push_tail (&parse->priv->queued_frames, frame);
1569 GST_TRACE ("queued frame %p", frame);
1571 GstBaseParseFrame *copy;
1573 /* probably allocated on the stack, must make a proper copy */
1574 copy = gst_base_parse_frame_copy (frame);
1575 g_queue_push_tail (&parse->priv->queued_frames, copy);
1576 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1577 gst_base_parse_frame_free (frame);
1581 /* gst_base_parse_handle_and_push_buffer:
1582 * @parse: #GstBaseParse.
1583 * @klass: #GstBaseParseClass.
1584 * @frame: (transfer full): a #GstBaseParseFrame
1586 * Parses the frame from given buffer and pushes it forward. Also performs
1587 * timestamp handling and checks the segment limits.
1589 * This is called with srcpad STREAM_LOCK held.
1591 * Returns: #GstFlowReturn
1593 static GstFlowReturn
1594 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1595 GstBaseParseClass * klass, GstBaseParseFrame * frame)
1601 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1603 buffer = frame->buffer;
1605 if (parse->priv->discont) {
1606 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1607 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1608 parse->priv->discont = FALSE;
1611 /* some one-time start-up */
1612 if (G_UNLIKELY (!parse->priv->framecount)) {
1613 gst_base_parse_check_seekability (parse);
1614 gst_base_parse_check_upstream (parse);
1617 GST_LOG_OBJECT (parse,
1618 "parsing frame at offset %" G_GUINT64_FORMAT
1619 " (%#" G_GINT64_MODIFIER "x) of size %d",
1620 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1621 gst_buffer_get_size (buffer));
1623 /* use default handler to provide initial (upstream) metadata */
1624 gst_base_parse_parse_frame (parse, frame);
1626 /* store offset as it might get overwritten */
1627 offset = GST_BUFFER_OFFSET (buffer);
1628 ret = klass->parse_frame (parse, frame);
1630 buffer = frame->buffer;
1631 /* subclass must play nice */
1632 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1634 /* check if subclass/format can provide ts.
1635 * If so, that allows and enables extra seek and duration determining options */
1636 if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
1637 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1638 && parse->priv->pad_mode == GST_ACTIVATE_PULL) {
1639 parse->priv->first_frame_offset = offset;
1640 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1641 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1642 " for first frame at offset %" G_GINT64_FORMAT,
1643 GST_TIME_ARGS (parse->priv->first_frame_ts),
1644 parse->priv->first_frame_offset);
1645 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1647 GstClockTime last_ts = G_MAXINT64;
1649 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1650 gst_base_parse_locate_time (parse, &last_ts, &off);
1651 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1652 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1655 /* disable further checks */
1656 parse->priv->first_frame_offset = 0;
1660 /* again use default handler to add missing metadata;
1661 * we may have new information on frame properties */
1662 gst_base_parse_parse_frame (parse, frame);
1663 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1664 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1665 parse->priv->next_ts =
1666 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1668 /* we lost track, do not produce bogus time next time around
1669 * (probably means parser subclass has given up on parsing as well) */
1670 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1671 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1674 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1675 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1676 gst_base_parse_add_index_entry (parse, offset,
1677 GST_BUFFER_TIMESTAMP (buffer),
1678 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1680 /* First buffers are dropped, this means that the subclass needs more
1681 * frames to decide on the format and queues them internally */
1682 /* convert internal flow to OK and mark discont for the next buffer. */
1683 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1684 gst_base_parse_frame_free (frame);
1686 } else if (ret == GST_BASE_PARSE_FLOW_QUEUED) {
1687 gst_base_parse_queue_frame (parse, frame);
1689 } else if (ret != GST_FLOW_OK) {
1693 /* All OK, push queued frames if there are any */
1694 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1695 GstBaseParseFrame *queued_frame;
1697 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1698 gst_base_parse_push_frame (parse, queued_frame);
1699 gst_base_parse_frame_free (queued_frame);
1703 return gst_base_parse_push_frame (parse, frame);
1707 * gst_base_parse_push_frame:
1708 * @parse: #GstBaseParse.
1709 * @frame: (transfer full): a #GstBaseParseFrame
1711 * Pushes the frame downstream, sends any pending events and
1712 * does some timestamp and segment handling. Takes ownership
1713 * of @frame and will clear it (if it was initialised with
1714 * gst_base_parse_frame_init()) or free it.
1716 * This must be called with sinkpad STREAM_LOCK held.
1718 * Returns: #GstFlowReturn
1723 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1725 GstFlowReturn ret = GST_FLOW_OK;
1726 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1727 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1728 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1732 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1733 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1735 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1737 buffer = frame->buffer;
1739 GST_LOG_OBJECT (parse,
1740 "processing buffer of size %d with ts %" GST_TIME_FORMAT
1741 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1742 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1743 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1746 size = gst_buffer_get_size (buffer);
1747 parse->priv->bytecount += size;
1748 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1749 parse->priv->framecount++;
1750 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1751 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1754 /* 0 means disabled */
1755 if (parse->priv->update_interval < 0)
1756 parse->priv->update_interval = 50;
1757 else if (parse->priv->update_interval > 0 &&
1758 (parse->priv->framecount % parse->priv->update_interval) == 0)
1759 gst_base_parse_update_duration (parse);
1761 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1762 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1763 if (last_start != GST_CLOCK_TIME_NONE
1764 && GST_BUFFER_DURATION_IS_VALID (buffer))
1765 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1767 /* should have caps by now */
1768 g_return_val_if_fail (gst_pad_has_current_caps (parse->srcpad),
1771 /* segment adjustment magic; only if we are running the whole show */
1772 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
1773 (parse->priv->pad_mode == GST_ACTIVATE_PULL ||
1774 parse->priv->upstream_seekable)) {
1775 /* segment times are typically estimates,
1776 * actual frame data might lead subclass to different timestamps,
1777 * so override segment start from what is supplied there */
1778 if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
1779 && GST_CLOCK_TIME_IS_VALID (last_start))) {
1780 gst_event_unref (parse->priv->pending_segment);
1781 parse->segment.start =
1782 MIN ((guint64) last_start, (guint64) parse->segment.stop);
1784 GST_DEBUG_OBJECT (parse,
1785 "adjusting pending segment start to %" GST_TIME_FORMAT,
1786 GST_TIME_ARGS (parse->segment.start));
1788 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
1790 /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
1791 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
1792 GST_CLOCK_TIME_IS_VALID (last_start)) {
1793 GstClockTimeDiff diff;
1795 /* only send newsegments with increasing start times,
1796 * otherwise if these go back and forth downstream (sinks) increase
1797 * accumulated time and running_time */
1798 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
1799 if (G_UNLIKELY (diff > 2 * GST_SECOND
1800 && last_start > parse->segment.start
1801 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
1802 || last_start < parse->segment.stop))) {
1804 GST_DEBUG_OBJECT (parse,
1805 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
1806 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
1807 "Sending updated NEWSEGMENT events", diff,
1808 GST_TIME_ARGS (parse->segment.position),
1809 GST_TIME_ARGS (last_start));
1811 if (G_UNLIKELY (parse->priv->pending_segment)) {
1812 gst_event_unref (parse->priv->pending_segment);
1813 parse->segment.start = last_start;
1814 parse->segment.time = last_start;
1815 parse->priv->pending_segment =
1816 gst_event_new_segment (&parse->segment);
1818 /* skip gap FIXME */
1819 gst_pad_push_event (parse->srcpad,
1820 gst_event_new_segment (&parse->segment));
1822 parse->segment.position = last_start;
1827 /* and should then also be linked downstream, so safe to send some events */
1828 if (G_UNLIKELY (parse->priv->close_segment)) {
1829 /* only set up by loop */
1830 GST_DEBUG_OBJECT (parse, "loop sending close segment");
1831 gst_pad_push_event (parse->srcpad, parse->priv->close_segment);
1832 parse->priv->close_segment = NULL;
1834 if (G_UNLIKELY (parse->priv->pending_segment)) {
1835 GST_DEBUG_OBJECT (parse, "%s push pending segment",
1836 parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
1837 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1838 parse->priv->pending_segment = NULL;
1840 /* have caps; check identity */
1841 gst_base_parse_check_media (parse);
1844 /* update bitrates and optionally post corresponding tags
1845 * (following newsegment) */
1846 gst_base_parse_update_bitrates (parse, frame);
1848 if (G_UNLIKELY (parse->priv->pending_events)) {
1851 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1852 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1854 g_list_free (parse->priv->pending_events);
1855 parse->priv->pending_events = NULL;
1858 if (klass->pre_push_frame) {
1859 ret = klass->pre_push_frame (parse, frame);
1861 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
1864 /* take final ownership of frame buffer */
1865 buffer = frame->buffer;
1866 frame->buffer = NULL;
1868 /* subclass must play nice */
1869 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
1871 parse->priv->seen_keyframe |= parse->priv->is_video &&
1872 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
1874 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
1875 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1876 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
1877 GST_BUFFER_TIMESTAMP (buffer) >
1878 parse->segment.stop + parse->priv->lead_out_ts) {
1879 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
1880 ret = GST_FLOW_UNEXPECTED;
1881 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1882 GST_BUFFER_DURATION_IS_VALID (buffer) &&
1883 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
1884 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
1885 parse->priv->lead_in_ts < parse->segment.start) {
1886 if (parse->priv->seen_keyframe) {
1887 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
1890 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
1891 ret = GST_BASE_PARSE_FLOW_DROPPED;
1898 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
1899 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
1900 gst_buffer_unref (buffer);
1902 } else if (ret == GST_FLOW_OK) {
1903 if (parse->segment.rate > 0.0) {
1904 ret = gst_pad_push (parse->srcpad, buffer);
1905 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) pushed: %s",
1906 size, gst_flow_get_name (ret));
1908 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
1910 parse->priv->buffers_queued =
1911 g_slist_prepend (parse->priv->buffers_queued, buffer);
1915 gst_buffer_unref (buffer);
1916 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
1917 size, gst_flow_get_name (ret));
1918 /* if we are not sufficiently in control, let upstream decide on EOS */
1919 if (ret == GST_FLOW_UNEXPECTED &&
1920 (parse->priv->passthrough ||
1921 (parse->priv->pad_mode == GST_ACTIVATE_PUSH &&
1922 !parse->priv->upstream_seekable)))
1926 /* Update current running segment position */
1927 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
1928 parse->segment.position < last_stop)
1929 parse->segment.position = last_stop;
1931 gst_base_parse_frame_free (frame);
1937 /* gst_base_parse_drain:
1939 * Drains the adapter until it is empty. It decreases the min_frame_size to
1940 * match the current adapter size and calls chain method until the adapter
1941 * is emptied or chain returns with error.
1944 gst_base_parse_drain (GstBaseParse * parse)
1948 GST_DEBUG_OBJECT (parse, "draining");
1949 parse->priv->drain = TRUE;
1952 avail = gst_adapter_available (parse->priv->adapter);
1956 if (gst_base_parse_chain (parse->sinkpad, NULL) != GST_FLOW_OK) {
1960 /* nothing changed, maybe due to truncated frame; break infinite loop */
1961 if (avail == gst_adapter_available (parse->priv->adapter)) {
1962 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
1963 gst_adapter_clear (parse->priv->adapter);
1967 parse->priv->drain = FALSE;
1970 /* gst_base_parse_send_buffers
1972 * Sends buffers collected in send_buffers downstream, and ensures that list
1973 * is empty at the end (errors or not).
1975 static GstFlowReturn
1976 gst_base_parse_send_buffers (GstBaseParse * parse)
1978 GSList *send = NULL;
1980 GstFlowReturn ret = GST_FLOW_OK;
1982 send = parse->priv->buffers_send;
1986 buf = GST_BUFFER_CAST (send->data);
1987 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
1988 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
1989 ", offset %" G_GINT64_FORMAT, buf,
1990 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
1991 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
1993 /* iterate output queue an push downstream */
1994 ret = gst_pad_push (parse->srcpad, buf);
1995 send = g_slist_delete_link (send, send);
1997 /* clear any leftover if error */
1998 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2000 buf = GST_BUFFER_CAST (send->data);
2001 gst_buffer_unref (buf);
2002 send = g_slist_delete_link (send, send);
2007 parse->priv->buffers_send = send;
2012 /* gst_base_parse_process_fragment:
2014 * Processes a reverse playback (forward) fragment:
2015 * - append head of last fragment that was skipped to current fragment data
2016 * - drain the resulting current fragment data (i.e. repeated chain)
2017 * - add time/duration (if needed) to frames queued by chain
2018 * - push queued data
2020 static GstFlowReturn
2021 gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
2024 GstFlowReturn ret = GST_FLOW_OK;
2025 gboolean seen_key = FALSE, seen_delta = FALSE;
2031 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2032 while (parse->priv->buffers_pending) {
2033 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2034 GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
2035 gst_buffer_get_size (buf));
2036 gst_adapter_push (parse->priv->adapter, buf);
2037 parse->priv->buffers_pending =
2038 g_slist_delete_link (parse->priv->buffers_pending,
2039 parse->priv->buffers_pending);
2042 /* invalidate so no fall-back timestamping is performed;
2043 * ok if taken from subclass or upstream */
2044 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2045 /* prevent it hanging around stop all the time */
2046 parse->segment.position = GST_CLOCK_TIME_NONE;
2048 parse->priv->discont = TRUE;
2050 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2051 /* initial skipped data is added to buffers_pending */
2052 gst_base_parse_drain (parse);
2055 if (parse->priv->buffers_send) {
2056 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2057 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2060 /* add metadata (if needed to queued buffers */
2061 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2062 GST_TIME_ARGS (parse->priv->last_ts));
2063 while (parse->priv->buffers_queued) {
2064 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2066 /* no touching if upstream or parsing provided time */
2067 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2068 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2069 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2070 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2071 GST_BUFFER_DURATION_IS_VALID (buf)) {
2072 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2073 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2075 parse->priv->last_ts = 0;
2076 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2077 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2078 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2080 /* no idea, very bad */
2081 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2084 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2086 /* reverse order for ascending sending */
2087 /* send downstream at keyframe not preceded by a keyframe
2088 * (e.g. that should identify start of collection of IDR nals) */
2089 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2091 ret = gst_base_parse_send_buffers (parse);
2092 /* if a problem, throw all to sending */
2093 if (ret != GST_FLOW_OK) {
2094 parse->priv->buffers_send =
2095 g_slist_reverse (parse->priv->buffers_queued);
2096 parse->priv->buffers_queued = NULL;
2105 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2107 parse->priv->buffers_send =
2108 g_slist_prepend (parse->priv->buffers_send, buf);
2109 parse->priv->buffers_queued =
2110 g_slist_delete_link (parse->priv->buffers_queued,
2111 parse->priv->buffers_queued);
2114 /* audio may have all marked as keyframe, so arrange to send here */
2116 ret = gst_base_parse_send_buffers (parse);
2118 /* any trailing unused no longer usable (ideally none) */
2119 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2120 GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
2121 gst_adapter_available (parse->priv->adapter));
2122 gst_adapter_clear (parse->priv->adapter);
2128 /* small helper that checks whether we have been trying to resync too long */
2129 static inline GstFlowReturn
2130 gst_base_parse_check_sync (GstBaseParse * parse)
2132 if (G_UNLIKELY (parse->priv->discont &&
2133 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2134 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2135 ("Failed to parse stream"), (NULL));
2136 return GST_FLOW_ERROR;
2142 static GstFlowReturn
2143 gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
2145 GstBaseParseClass *bclass;
2146 GstBaseParse *parse;
2147 GstFlowReturn ret = GST_FLOW_OK;
2148 GstBuffer *outbuf = NULL;
2149 GstBuffer *tmpbuf = NULL;
2153 guint old_min_size = 0, min_size, av;
2154 GstClockTime timestamp;
2155 GstBaseParseFrame _frame;
2156 GstBaseParseFrame *frame;
2158 parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
2159 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2162 gst_base_parse_frame_init (frame);
2164 if (G_LIKELY (buffer)) {
2165 GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
2166 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer));
2167 if (G_UNLIKELY (parse->priv->passthrough)) {
2168 frame->buffer = gst_buffer_make_writable (buffer);
2169 return gst_base_parse_push_frame (parse, frame);
2171 /* upstream feeding us in reverse playback;
2172 * gather each fragment, then process it in single run */
2173 if (parse->segment.rate < 0.0) {
2174 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2175 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2176 ret = gst_base_parse_process_fragment (parse, FALSE);
2178 gst_adapter_push (parse->priv->adapter, buffer);
2181 gst_adapter_push (parse->priv->adapter, buffer);
2184 /* Parse and push as many frames as possible */
2185 /* Stop either when adapter is empty or we are flushing */
2186 while (!parse->priv->flushing) {
2189 tmpbuf = gst_buffer_new ();
2192 /* Synchronization loop */
2194 min_size = MAX (parse->priv->min_frame_size, fsize);
2195 av = gst_adapter_available (parse->priv->adapter);
2197 /* loop safety check */
2198 if (G_UNLIKELY (old_min_size >= min_size))
2200 old_min_size = min_size;
2202 if (G_UNLIKELY (parse->priv->drain)) {
2204 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2205 if (G_UNLIKELY (!min_size)) {
2206 gst_buffer_unref (tmpbuf);
2211 /* Collect at least min_frame_size bytes */
2212 if (av < min_size) {
2213 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
2215 gst_buffer_unref (tmpbuf);
2219 /* always pass all available data */
2220 data = gst_adapter_map (parse->priv->adapter, av);
2221 gst_buffer_take_memory (tmpbuf,
2222 gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY,
2223 (gpointer) data, NULL, min_size, 0, min_size));
2224 GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
2226 if (parse->priv->discont) {
2227 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2228 GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
2232 gst_base_parse_frame_update (parse, frame, tmpbuf);
2233 res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
2234 gst_adapter_unmap (parse->priv->adapter, 0);
2235 gst_buffer_replace (&frame->buffer, NULL);
2237 if (gst_adapter_available (parse->priv->adapter) < fsize) {
2238 GST_DEBUG_OBJECT (parse,
2239 "found valid frame but not enough data available (only %d bytes)",
2240 gst_adapter_available (parse->priv->adapter));
2241 gst_buffer_unref (tmpbuf);
2244 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2248 /* subclass didn't touch this value. By default we skip 1 byte */
2252 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2253 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2254 /* reverse playback, and no frames found yet, so we are skipping
2255 * the leading part of a fragment, which may form the tail of
2256 * fragment coming later, hopefully subclass skips efficiently ... */
2257 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2258 outbuf = gst_adapter_take_buffer (parse->priv->adapter, skip);
2259 outbuf = gst_buffer_make_writable (outbuf);
2260 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
2261 parse->priv->buffers_pending =
2262 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2265 gst_adapter_flush (parse->priv->adapter, skip);
2267 parse->priv->offset += skip;
2268 if (!parse->priv->discont)
2269 parse->priv->sync_offset = parse->priv->offset;
2270 parse->priv->discont = TRUE;
2271 /* something changed least; nullify loop check */
2274 /* skip == 0 should imply subclass set min_size to need more data;
2275 * we check this shortly */
2276 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2277 gst_buffer_unref (tmpbuf);
2281 gst_buffer_unref (tmpbuf);
2285 /* Subclass found the sync, but still wants to skip some data */
2286 GST_LOG_OBJECT (parse, "skipping %d bytes", skip);
2287 gst_adapter_flush (parse->priv->adapter, skip);
2288 parse->priv->offset += skip;
2291 /* Grab lock to prevent a race with FLUSH_START handler */
2292 GST_PAD_STREAM_LOCK (parse->srcpad);
2294 /* FLUSH_START event causes the "flushing" flag to be set. In this
2295 * case we can leave the frame pushing loop */
2296 if (parse->priv->flushing) {
2297 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2301 /* move along with upstream timestamp (if any),
2302 * but interpolate in between */
2303 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2304 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2305 (parse->priv->prev_ts != timestamp)) {
2306 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2309 /* FIXME: Would it be more efficient to make a subbuffer instead? */
2310 outbuf = gst_adapter_take_buffer (parse->priv->adapter, fsize);
2311 outbuf = gst_buffer_make_writable (outbuf);
2313 /* Subclass may want to know the data offset */
2314 GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
2315 parse->priv->offset += fsize;
2316 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2317 GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
2319 frame->buffer = outbuf;
2320 ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
2321 GST_PAD_STREAM_UNLOCK (parse->srcpad);
2323 if (ret != GST_FLOW_OK) {
2324 GST_LOG_OBJECT (parse, "push returned %d", ret);
2330 GST_LOG_OBJECT (parse, "chain leaving");
2336 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2337 ("min_size evolution %d -> %d; breaking to avoid looping",
2338 old_min_size, min_size));
2339 return GST_FLOW_ERROR;
2343 /* pull @size bytes at current offset,
2344 * i.e. at least try to and possibly return a shorter buffer if near the end */
2345 static GstFlowReturn
2346 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2347 GstBuffer ** buffer)
2349 GstFlowReturn ret = GST_FLOW_OK;
2351 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2353 /* Caching here actually makes much less difference than one would expect.
2354 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2355 if (parse->priv->cache) {
2356 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2357 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2359 if (cache_offset <= parse->priv->offset &&
2360 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2361 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2362 parse->priv->offset - cache_offset, size);
2363 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2366 /* not enough data in the cache, free cache and get a new one */
2367 gst_buffer_unref (parse->priv->cache);
2368 parse->priv->cache = NULL;
2371 /* refill the cache */
2373 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2374 64 * 1024), &parse->priv->cache);
2375 if (ret != GST_FLOW_OK) {
2376 parse->priv->cache = NULL;
2380 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2382 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2384 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2388 /* Not possible to get enough data, try a last time with
2389 * requesting exactly the size we need */
2390 gst_buffer_unref (parse->priv->cache);
2391 parse->priv->cache = NULL;
2393 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2394 &parse->priv->cache);
2396 if (ret != GST_FLOW_OK) {
2397 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2402 if (gst_buffer_get_size (parse->priv->cache) < size) {
2403 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2404 G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", parse->priv->offset,
2405 size, gst_buffer_get_size (parse->priv->cache));
2407 *buffer = parse->priv->cache;
2408 parse->priv->cache = NULL;
2414 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2415 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2420 static GstFlowReturn
2421 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2424 GstClockTime ts = 0;
2428 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2429 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2430 parse->priv->last_offset);
2432 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2433 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2434 GST_TIME_ARGS (parse->segment.start));
2435 ret = GST_FLOW_UNEXPECTED;
2439 /* last fragment started at last_offset / last_ts;
2440 * seek back 10s capped at 1MB */
2441 if (parse->priv->last_ts >= 10 * GST_SECOND)
2442 ts = parse->priv->last_ts - 10 * GST_SECOND;
2443 /* if we are exact now, we will be more so going backwards */
2444 if (parse->priv->exact_position) {
2445 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2447 GstFormat dstformat = GST_FORMAT_BYTES;
2449 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2450 &dstformat, &offset)) {
2451 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2454 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2455 parse->priv->last_offset - 1024);
2456 offset = MAX (0, offset);
2458 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2460 parse->priv->offset = offset;
2462 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2464 if (ret != GST_FLOW_OK)
2467 /* offset will increase again as fragment is processed/parsed */
2468 parse->priv->last_offset = offset;
2470 gst_adapter_push (parse->priv->adapter, buffer);
2471 ret = gst_base_parse_process_fragment (parse, FALSE);
2472 if (ret != GST_FLOW_OK)
2475 /* force previous fragment */
2476 parse->priv->offset = -1;
2483 * pull and scan for next frame starting from current offset
2484 * ajusts sync, drain and offset going along */
2485 static GstFlowReturn
2486 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2487 GstBaseParseFrame * frame, gboolean full)
2489 GstBuffer *buffer, *outbuf;
2490 GstFlowReturn ret = GST_FLOW_OK;
2491 guint fsize = 1, min_size, old_min_size = 0;
2494 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2496 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2497 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2502 min_size = MAX (parse->priv->min_frame_size, fsize);
2503 /* loop safety check */
2504 if (G_UNLIKELY (old_min_size >= min_size))
2506 old_min_size = min_size;
2508 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2509 if (ret != GST_FLOW_OK)
2512 if (parse->priv->discont) {
2513 GST_DEBUG_OBJECT (parse, "marking DISCONT");
2514 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
2517 /* if we got a short read, inform subclass we are draining leftover
2518 * and no more is to be expected */
2519 if (gst_buffer_get_size (buffer) < min_size)
2520 parse->priv->drain = TRUE;
2523 gst_base_parse_frame_update (parse, frame, buffer);
2524 res = klass->check_valid_frame (parse, frame, &fsize, &skip);
2525 gst_buffer_replace (&frame->buffer, NULL);
2527 parse->priv->drain = FALSE;
2528 GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
2531 parse->priv->drain = FALSE;
2535 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
2536 if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2537 /* reverse playback, and no frames found yet, so we are skipping
2538 * the leading part of a fragment, which may form the tail of
2539 * fragment coming later, hopefully subclass skips efficiently ... */
2540 outbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 0, skip);
2541 parse->priv->buffers_pending =
2542 g_slist_prepend (parse->priv->buffers_pending, outbuf);
2545 parse->priv->offset += skip;
2546 if (!parse->priv->discont)
2547 parse->priv->sync_offset = parse->priv->offset;
2548 parse->priv->discont = TRUE;
2549 /* something changed least; nullify loop check */
2552 /* skip == 0 should imply subclass set min_size to need more data;
2553 * we check this shortly */
2554 GST_DEBUG_OBJECT (parse, "finding sync...");
2555 gst_buffer_unref (buffer);
2556 if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
2561 /* Does the subclass want to skip too? */
2563 parse->priv->offset += skip;
2567 if (fsize + skip <= gst_buffer_get_size (buffer)) {
2568 outbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, skip, fsize);
2569 GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
2570 GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
2571 gst_buffer_unref (buffer);
2573 gst_buffer_unref (buffer);
2574 ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
2575 if (ret != GST_FLOW_OK)
2577 if (gst_buffer_get_size (outbuf) < fsize) {
2578 gst_buffer_unref (outbuf);
2579 ret = GST_FLOW_UNEXPECTED;
2583 parse->priv->offset += fsize;
2585 frame->buffer = outbuf;
2593 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2594 ("min_size evolution %d -> %d; breaking to avoid looping",
2595 old_min_size, min_size));
2596 return GST_FLOW_ERROR;
2600 /* Loop that is used in pull mode to retrieve data from upstream */
2602 gst_base_parse_loop (GstPad * pad)
2604 GstBaseParse *parse;
2605 GstBaseParseClass *klass;
2606 GstFlowReturn ret = GST_FLOW_OK;
2607 GstBaseParseFrame frame;
2609 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2610 klass = GST_BASE_PARSE_GET_CLASS (parse);
2612 /* reverse playback:
2613 * first fragment (closest to stop time) is handled normally below,
2614 * then we pull in fragments going backwards */
2615 if (parse->segment.rate < 0.0) {
2616 /* check if we jumped back to a previous fragment,
2617 * which is a post-first fragment */
2618 if (parse->priv->offset < 0) {
2619 ret = gst_base_parse_handle_previous_fragment (parse);
2624 gst_base_parse_frame_init (&frame);
2625 ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
2626 if (ret != GST_FLOW_OK)
2629 /* This always cleans up frame, even if error occurs */
2630 ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
2632 /* eat expected eos signalling past segment in reverse playback */
2633 if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
2634 parse->segment.position >= parse->segment.stop) {
2635 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2636 /* push what was accumulated during loop run */
2637 gst_base_parse_process_fragment (parse, TRUE);
2638 /* force previous fragment */
2639 parse->priv->offset = -1;
2644 if (ret == GST_FLOW_UNEXPECTED)
2646 else if (ret != GST_FLOW_OK)
2649 gst_object_unref (parse);
2655 ret = GST_FLOW_UNEXPECTED;
2656 GST_DEBUG_OBJECT (parse, "eos");
2661 gboolean push_eos = FALSE;
2663 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2664 gst_flow_get_name (ret));
2665 gst_pad_pause_task (parse->sinkpad);
2667 if (ret == GST_FLOW_UNEXPECTED) {
2668 /* handle end-of-stream/segment */
2669 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2672 if ((stop = parse->segment.stop) == -1)
2673 stop = parse->segment.duration;
2675 GST_DEBUG_OBJECT (parse, "sending segment_done");
2677 gst_element_post_message
2678 (GST_ELEMENT_CAST (parse),
2679 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2680 GST_FORMAT_TIME, stop));
2682 /* If we STILL have zero frames processed, fire an error */
2683 if (parse->priv->framecount == 0) {
2684 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2685 ("No valid frames found before end of stream"), (NULL));
2689 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
2690 /* for fatal errors we post an error message, wrong-state is
2691 * not fatal because it happens due to flushes and only means
2692 * that we should stop now. */
2693 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2694 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2698 /* newsegment before eos */
2699 if (parse->priv->pending_segment) {
2700 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
2701 parse->priv->pending_segment = NULL;
2703 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
2705 gst_object_unref (parse);
2710 gst_base_parse_sink_activate (GstPad * sinkpad)
2712 GstBaseParse *parse;
2713 gboolean result = TRUE;
2715 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2717 GST_DEBUG_OBJECT (parse, "sink activate");
2719 if (gst_pad_check_pull_range (sinkpad)) {
2720 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
2721 result = gst_pad_activate_pull (sinkpad, TRUE);
2723 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
2724 result = gst_pad_activate_push (sinkpad, TRUE);
2727 GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
2728 gst_object_unref (parse);
2733 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
2735 GstBaseParseClass *klass;
2736 gboolean result = FALSE;
2738 GST_DEBUG_OBJECT (parse, "activate %d", active);
2740 klass = GST_BASE_PARSE_GET_CLASS (parse);
2743 if (parse->priv->pad_mode == GST_ACTIVATE_NONE && klass->start)
2744 result = klass->start (parse);
2746 /* We must make sure streaming has finished before resetting things
2747 * and calling the ::stop vfunc */
2748 GST_PAD_STREAM_LOCK (parse->sinkpad);
2749 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
2751 if (parse->priv->pad_mode != GST_ACTIVATE_NONE && klass->stop)
2752 result = klass->stop (parse);
2754 parse->priv->pad_mode = GST_ACTIVATE_NONE;
2756 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
2761 gst_base_parse_sink_activate_push (GstPad * pad, gboolean active)
2763 gboolean result = TRUE;
2764 GstBaseParse *parse;
2766 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2768 GST_DEBUG_OBJECT (parse, "sink activate push %d", active);
2770 result = gst_base_parse_activate (parse, active);
2773 parse->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
2775 GST_DEBUG_OBJECT (parse, "sink activate push return: %d", result);
2777 gst_object_unref (parse);
2782 gst_base_parse_sink_activate_pull (GstPad * sinkpad, gboolean active)
2784 gboolean result = FALSE;
2785 GstBaseParse *parse;
2787 parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
2789 GST_DEBUG_OBJECT (parse, "activate pull %d", active);
2791 result = gst_base_parse_activate (parse, active);
2795 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
2797 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
2800 result &= gst_pad_stop_task (sinkpad);
2805 parse->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
2807 GST_DEBUG_OBJECT (parse, "sink activate pull return: %d", result);
2809 gst_object_unref (parse);
2815 * gst_base_parse_set_duration:
2816 * @parse: #GstBaseParse.
2818 * @duration: duration value.
2819 * @interval: how often to update the duration estimate based on bitrate, or 0.
2821 * Sets the duration of the currently playing media. Subclass can use this
2822 * when it is able to determine duration and/or notices a change in the media
2823 * duration. Alternatively, if @interval is non-zero (default), then stream
2824 * duration is determined based on estimated bitrate, and updated every @interval
2830 gst_base_parse_set_duration (GstBaseParse * parse,
2831 GstFormat fmt, gint64 duration, gint interval)
2833 g_return_if_fail (parse != NULL);
2835 if (parse->priv->upstream_has_duration) {
2836 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
2840 if (duration != parse->priv->duration) {
2843 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
2844 gst_element_post_message (GST_ELEMENT (parse), m);
2846 /* TODO: what about duration tag? */
2848 parse->priv->duration = duration;
2849 parse->priv->duration_fmt = fmt;
2850 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
2851 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
2852 if (interval != 0) {
2853 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
2857 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
2858 parse->priv->update_interval = interval;
2864 * gst_base_parse_set_average_bitrate:
2865 * @parse: #GstBaseParse.
2866 * @bitrate: average bitrate in bits/second
2868 * Optionally sets the average bitrate detected in media (if non-zero),
2869 * e.g. based on metadata, as it will be posted to the application.
2871 * By default, announced average bitrate is estimated. The average bitrate
2872 * is used to estimate the total duration of the stream and to estimate
2873 * a seek position, if there's no index and the format is syncable
2874 * (see gst_base_parse_set_syncable()).
2879 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
2881 parse->priv->bitrate = bitrate;
2882 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
2886 * gst_base_parse_set_min_frame_size:
2887 * @parse: #GstBaseParse.
2888 * @min_size: Minimum size of the data that this base class should give to
2891 * Subclass can use this function to tell the base class that it needs to
2892 * give at least #min_size buffers.
2897 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
2899 g_return_if_fail (parse != NULL);
2901 parse->priv->min_frame_size = min_size;
2902 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
2906 * gst_base_parse_set_frame_rate:
2907 * @parse: the #GstBaseParse to set
2908 * @fps_num: frames per second (numerator).
2909 * @fps_den: frames per second (denominator).
2910 * @lead_in: frames needed before a segment for subsequent decode
2911 * @lead_out: frames needed after a segment
2913 * If frames per second is configured, parser can take care of buffer duration
2914 * and timestamping. When performing segment clipping, or seeking to a specific
2915 * location, a corresponding decoder might need an initial @lead_in and a
2916 * following @lead_out number of frames to ensure the desired segment is
2917 * entirely filled upon decoding.
2922 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
2923 guint fps_den, guint lead_in, guint lead_out)
2925 g_return_if_fail (parse != NULL);
2927 parse->priv->fps_num = fps_num;
2928 parse->priv->fps_den = fps_den;
2929 if (!fps_num || !fps_den) {
2930 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
2932 fps_num = fps_den = 0;
2933 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
2934 parse->priv->lead_in = parse->priv->lead_out = 0;
2935 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
2937 parse->priv->frame_duration =
2938 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
2939 parse->priv->lead_in = lead_in;
2940 parse->priv->lead_out = lead_out;
2941 parse->priv->lead_in_ts =
2942 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
2943 parse->priv->lead_out_ts =
2944 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
2945 /* aim for about 1.5s to estimate duration */
2946 if (parse->priv->update_interval < 0) {
2947 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
2948 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
2949 parse->priv->update_interval);
2952 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
2953 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
2954 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
2955 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
2956 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
2957 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
2961 * gst_base_parse_set_has_timing_info:
2962 * @parse: a #GstBaseParse
2963 * @has_timing: whether frames carry timing information
2965 * Set if frames carry timing information which the subclass can (generally)
2966 * parse and provide. In particular, intrinsic (rather than estimated) time
2967 * can be obtained following a seek.
2972 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
2974 parse->priv->has_timing_info = has_timing;
2975 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
2979 * gst_base_parse_set_syncable:
2980 * @parse: a #GstBaseParse
2981 * @syncable: set if frame starts can be identified
2983 * Set if frame starts can be identified. This is set by default and
2984 * determines whether seeking based on bitrate averages
2985 * is possible for a format/stream.
2990 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
2992 parse->priv->syncable = syncable;
2993 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
2997 * gst_base_parse_set_passthrough:
2998 * @parse: a #GstBaseParse
2999 * @passthrough: %TRUE if parser should run in passthrough mode
3001 * Set if the nature of the format or configuration does not allow (much)
3002 * parsing, and the parser should operate in passthrough mode (which only
3003 * applies when operating in push mode). That is, incoming buffers are
3004 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3005 * callbacks will be invoked, but @pre_push_buffer will still be invoked,
3006 * so subclass can perform as much or as little is appropriate for
3007 * passthrough semantics in @pre_push_buffer.
3012 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3014 parse->priv->passthrough = passthrough;
3015 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3019 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3020 GstClockTime * duration)
3022 gboolean res = FALSE;
3024 g_return_val_if_fail (duration != NULL, FALSE);
3026 *duration = GST_CLOCK_TIME_NONE;
3027 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3028 GST_LOG_OBJECT (parse, "using provided duration");
3029 *duration = parse->priv->duration;
3031 } else if (parse->priv->duration != -1) {
3032 GST_LOG_OBJECT (parse, "converting provided duration");
3033 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3034 parse->priv->duration, format, (gint64 *) duration);
3035 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3036 GST_LOG_OBJECT (parse, "using estimated duration");
3037 *duration = parse->priv->estimated_duration;
3041 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3042 GST_TIME_ARGS (*duration));
3046 static const GstQueryType *
3047 gst_base_parse_get_querytypes (GstPad * pad)
3049 static const GstQueryType list[] = {
3062 gst_base_parse_query (GstPad * pad, GstQuery ** query)
3064 GstBaseParse *parse;
3065 gboolean res = FALSE;
3067 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
3069 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3071 switch (GST_QUERY_TYPE (*query)) {
3072 case GST_QUERY_POSITION:
3077 GST_DEBUG_OBJECT (parse, "position query");
3078 gst_query_parse_position (*query, &format, NULL);
3080 GST_OBJECT_LOCK (parse);
3081 if (format == GST_FORMAT_BYTES) {
3082 dest_value = parse->priv->offset;
3084 } else if (format == parse->segment.format &&
3085 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3086 dest_value = parse->segment.position;
3089 GST_OBJECT_UNLOCK (parse);
3092 *query = gst_query_make_writable (*query);
3093 gst_query_set_position (*query, format, dest_value);
3095 res = gst_pad_query_default (pad, query);
3097 /* no precise result, upstream no idea either, then best estimate */
3098 /* priv->offset is updated in both PUSH/PULL modes */
3099 res = gst_base_parse_convert (parse,
3100 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3105 case GST_QUERY_DURATION:
3108 GstClockTime duration;
3110 GST_DEBUG_OBJECT (parse, "duration query");
3111 gst_query_parse_duration (*query, &format, NULL);
3113 /* consult upstream */
3114 res = gst_pad_query_default (pad, query);
3116 /* otherwise best estimate from us */
3118 res = gst_base_parse_get_duration (parse, format, &duration);
3120 *query = gst_query_make_writable (*query);
3121 gst_query_set_duration (*query, format, duration);
3126 case GST_QUERY_SEEKING:
3129 GstClockTime duration = GST_CLOCK_TIME_NONE;
3130 gboolean seekable = FALSE;
3132 GST_DEBUG_OBJECT (parse, "seeking query");
3133 gst_query_parse_seeking (*query, &fmt, NULL, NULL, NULL);
3135 /* consult upstream */
3136 res = gst_pad_query_default (pad, query);
3138 /* we may be able to help if in TIME */
3139 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3140 gst_query_parse_seeking (*query, &fmt, &seekable, NULL, NULL);
3141 /* already OK if upstream takes care */
3142 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3144 if (!(res && seekable)) {
3145 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3146 || duration == -1) {
3147 /* seekable if we still have a chance to get duration later on */
3149 parse->priv->upstream_seekable && parse->priv->update_interval;
3151 seekable = parse->priv->upstream_seekable;
3152 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3155 *query = gst_query_make_writable (*query);
3156 gst_query_set_seeking (*query, GST_FORMAT_TIME, seekable, 0,
3163 case GST_QUERY_FORMATS:
3164 *query = gst_query_make_writable (*query);
3165 gst_query_set_formatsv (*query, 3, fmtlist);
3168 case GST_QUERY_CONVERT:
3170 GstFormat src_format, dest_format;
3171 gint64 src_value, dest_value;
3173 gst_query_parse_convert (*query, &src_format, &src_value,
3174 &dest_format, &dest_value);
3176 res = gst_base_parse_convert (parse, src_format, src_value,
3177 dest_format, &dest_value);
3179 *query = gst_query_make_writable (*query);
3180 gst_query_set_convert (*query, src_format, src_value,
3181 dest_format, dest_value);
3186 res = gst_pad_query_default (pad, query);
3192 /* scans for a cluster start from @pos,
3193 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3194 static GstFlowReturn
3195 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3196 GstClockTime * time, GstClockTime * duration)
3198 GstBaseParseClass *klass;
3200 gboolean orig_drain, orig_discont;
3201 GstFlowReturn ret = GST_FLOW_OK;
3202 GstBuffer *buf = NULL;
3203 GstBaseParseFrame frame;
3205 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3206 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3207 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3209 klass = GST_BASE_PARSE_GET_CLASS (parse);
3211 *time = GST_CLOCK_TIME_NONE;
3212 *duration = GST_CLOCK_TIME_NONE;
3215 orig_offset = parse->priv->offset;
3216 orig_discont = parse->priv->discont;
3217 orig_drain = parse->priv->drain;
3219 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3220 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3222 gst_base_parse_frame_init (&frame);
3224 /* jump elsewhere and locate next frame */
3225 parse->priv->offset = *pos;
3226 ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
3227 if (ret != GST_FLOW_OK)
3231 GST_LOG_OBJECT (parse,
3232 "peek parsing frame at offset %" G_GUINT64_FORMAT
3233 " (%#" G_GINT64_MODIFIER "x) of size %d",
3234 GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf),
3235 gst_buffer_get_size (buf));
3237 /* get offset first, subclass parsing might dump other stuff in there */
3238 *pos = GST_BUFFER_OFFSET (buf);
3239 ret = klass->parse_frame (parse, &frame);
3242 /* but it should provide proper time */
3243 *time = GST_BUFFER_TIMESTAMP (buf);
3244 *duration = GST_BUFFER_DURATION (buf);
3246 gst_base_parse_frame_free (&frame);
3248 GST_LOG_OBJECT (parse,
3249 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3250 GST_TIME_ARGS (*time), *pos);
3254 parse->priv->offset = orig_offset;
3255 parse->priv->discont = orig_discont;
3256 parse->priv->drain = orig_drain;
3261 /* bisect and scan through file for frame starting before @time,
3262 * returns OK and @time/@offset if found, NONE and/or error otherwise
3263 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3264 static GstFlowReturn
3265 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3268 GstFlowReturn ret = GST_FLOW_OK;
3269 gint64 lpos, hpos, newpos;
3270 GstClockTime time, ltime, htime, newtime, dur;
3271 gboolean cont = TRUE;
3272 const GstClockTime tolerance = TARGET_DIFFERENCE;
3273 const guint chunk = 4 * 1024;
3275 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3276 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3278 /* TODO also make keyframe aware if useful some day */
3293 /* do not know at first */
3295 *_time = GST_CLOCK_TIME_NONE;
3297 /* need initial positions; start and end */
3298 lpos = parse->priv->first_frame_offset;
3299 ltime = parse->priv->first_frame_ts;
3300 htime = parse->priv->duration;
3301 hpos = parse->priv->upstream_size;
3303 /* check preconditions are satisfied;
3304 * start and end are needed, except for special case where we scan for
3305 * last frame to determine duration */
3306 if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
3307 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3308 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3312 /* shortcut cases */
3315 } else if (time < ltime + tolerance) {
3319 } else if (time >= htime) {
3325 while (htime > ltime && cont) {
3326 GST_LOG_OBJECT (parse,
3327 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3328 GST_TIME_ARGS (ltime));
3329 GST_LOG_OBJECT (parse,
3330 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3331 GST_TIME_ARGS (htime));
3332 if (G_UNLIKELY (time == G_MAXINT64)) {
3334 } else if (G_LIKELY (hpos > lpos)) {
3336 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3339 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3341 /* we check this case once, but not forever, so break loop */
3346 newpos = CLAMP (newpos, lpos, hpos);
3347 GST_LOG_OBJECT (parse,
3348 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3349 GST_TIME_ARGS (time), newpos);
3351 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3352 if (ret == GST_FLOW_UNEXPECTED) {
3353 /* heuristic HACK */
3354 hpos = MAX (lpos, hpos - chunk);
3356 } else if (ret != GST_FLOW_OK) {
3360 if (newtime == -1 || newpos == -1) {
3361 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3365 if (G_UNLIKELY (time == G_MAXINT64)) {
3368 if (GST_CLOCK_TIME_IS_VALID (dur))
3371 } else if (newtime > time) {
3373 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3375 } else if (newtime + tolerance > time) {
3376 /* close enough undershoot */
3380 } else if (newtime < ltime) {
3381 /* so a position beyond lpos resulted in earlier time than ltime ... */
3382 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3385 /* undershoot too far */
3386 newpos += newpos == lpos ? chunk : 0;
3387 lpos = CLAMP (newpos, lpos, hpos);
3393 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3394 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3399 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3400 gboolean before, GstClockTime * _ts)
3402 gint64 bytes = 0, ts = 0;
3403 GstIndexEntry *entry = NULL;
3405 if (time == GST_CLOCK_TIME_NONE) {
3411 g_static_mutex_lock (&parse->priv->index_lock);
3412 if (parse->priv->index) {
3413 /* Let's check if we have an index entry for that time */
3414 entry = gst_index_get_assoc_entry (parse->priv->index,
3415 parse->priv->index_id,
3416 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3417 GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3421 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3422 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3424 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3425 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3426 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3428 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3429 GST_TIME_ARGS (time));
3432 ts = GST_CLOCK_TIME_NONE;
3435 g_static_mutex_unlock (&parse->priv->index_lock);
3444 /* returns TRUE if seek succeeded */
3446 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3451 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3452 gboolean flush, update, res = TRUE, accurate;
3453 gint64 cur, stop, seekpos, seekstop;
3454 GstSegment seeksegment = { 0, };
3455 GstFormat dstformat;
3456 GstClockTime start_ts;
3458 gst_event_parse_seek (event, &rate, &format, &flags,
3459 &cur_type, &cur, &stop_type, &stop);
3461 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3462 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3463 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3464 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3466 /* no negative rates in push mode */
3467 if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
3470 if (cur_type != GST_SEEK_TYPE_SET ||
3471 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3474 /* For any format other than TIME, see if upstream handles
3475 * it directly or fail. For TIME, try upstream, but do it ourselves if
3476 * it fails upstream */
3477 if (format != GST_FORMAT_TIME) {
3478 /* default action delegates to upstream */
3482 gst_event_ref (event);
3483 if ((res = gst_pad_push_event (parse->sinkpad, event))) {
3488 /* get flush flag */
3489 flush = flags & GST_SEEK_FLAG_FLUSH;
3491 /* copy segment, we need this because we still need the old
3492 * segment when we close the current segment. */
3493 gst_segment_copy_into (&parse->segment, &seeksegment);
3495 GST_DEBUG_OBJECT (parse, "configuring seek");
3496 gst_segment_do_seek (&seeksegment, rate, format, flags,
3497 cur_type, cur, stop_type, stop, &update);
3499 /* accurate seeking implies seek tables are used to obtain position,
3500 * and the requested segment is maintained exactly, not adjusted any way */
3501 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3503 /* maybe we can be accurate for (almost) free */
3504 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3505 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3506 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3510 GstClockTime startpos = seeksegment.position;
3512 /* accurate requested, so ... seek a bit before target */
3513 if (startpos < parse->priv->lead_in_ts)
3516 startpos -= parse->priv->lead_in_ts;
3517 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3518 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3521 start_ts = seeksegment.position;
3522 dstformat = GST_FORMAT_BYTES;
3523 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.position,
3524 &dstformat, &seekpos))
3525 goto convert_failed;
3526 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3527 &dstformat, &seekstop))
3528 goto convert_failed;
3531 GST_DEBUG_OBJECT (parse,
3532 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3534 GST_DEBUG_OBJECT (parse,
3535 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3536 seeksegment.stop, seekstop);
3538 if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
3541 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3544 if (parse->srcpad) {
3545 GST_DEBUG_OBJECT (parse, "sending flush start");
3546 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3547 /* unlock upstream pull_range */
3548 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3551 gst_pad_pause_task (parse->sinkpad);
3554 /* we should now be able to grab the streaming thread because we stopped it
3555 * with the above flush/pause code */
3556 GST_PAD_STREAM_LOCK (parse->sinkpad);
3558 /* save current position */
3559 last_stop = parse->segment.position;
3560 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3563 /* now commit to new position */
3565 /* prepare for streaming again */
3567 GST_DEBUG_OBJECT (parse, "sending flush stop");
3568 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
3569 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
3570 gst_base_parse_clear_queues (parse);
3572 /* keep track of our position */
3573 seeksegment.base = gst_segment_to_running_time (&seeksegment,
3574 seeksegment.format, parse->segment.position);
3577 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3579 /* store the newsegment event so it can be sent from the streaming thread. */
3580 if (parse->priv->pending_segment)
3581 gst_event_unref (parse->priv->pending_segment);
3583 /* This will be sent later in _loop() */
3584 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
3586 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3587 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3588 ", pos = %" GST_TIME_FORMAT, format,
3589 GST_TIME_ARGS (parse->segment.start),
3590 GST_TIME_ARGS (parse->segment.stop),
3591 GST_TIME_ARGS (parse->segment.start));
3593 /* one last chance in pull mode to stay accurate;
3594 * maybe scan and subclass can find where to go */
3597 GstClockTime ts = seeksegment.position;
3599 gst_base_parse_locate_time (parse, &ts, &scanpos);
3603 /* running collected index now consists of several intervals,
3604 * so optimized check no longer possible */
3605 parse->priv->index_last_valid = FALSE;
3606 parse->priv->index_last_offset = 0;
3607 parse->priv->index_last_ts = 0;
3611 /* mark discont if we are going to stream from another position. */
3612 if (seekpos != parse->priv->offset) {
3613 GST_DEBUG_OBJECT (parse,
3614 "mark DISCONT, we did a seek to another position");
3615 parse->priv->offset = seekpos;
3616 parse->priv->last_offset = seekpos;
3617 parse->priv->seen_keyframe = FALSE;
3618 parse->priv->discont = TRUE;
3619 parse->priv->next_ts = start_ts;
3620 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3621 parse->priv->sync_offset = seekpos;
3622 parse->priv->exact_position = accurate;
3625 /* Start streaming thread if paused */
3626 gst_pad_start_task (parse->sinkpad,
3627 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3629 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3634 GstEvent *new_event;
3635 GstBaseParseSeek *seek;
3637 /* The only thing we need to do in PUSH-mode is to send the
3638 seek event (in bytes) to upstream. Segment / flush handling happens
3639 in corresponding src event handlers */
3640 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3641 if (seekstop >= 0 && seekpos <= seekpos)
3643 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flush,
3644 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3646 /* store segment info so its precise details can be reconstructed when
3647 * receiving newsegment;
3648 * this matters for all details when accurate seeking,
3649 * is most useful to preserve NONE stop time otherwise */
3650 seek = g_new0 (GstBaseParseSeek, 1);
3651 seek->segment = seeksegment;
3652 seek->accurate = accurate;
3653 seek->offset = seekpos;
3654 seek->start_ts = start_ts;
3655 GST_OBJECT_LOCK (parse);
3656 /* less optimal, but preserves order */
3657 parse->priv->pending_seeks =
3658 g_slist_append (parse->priv->pending_seeks, seek);
3659 GST_OBJECT_UNLOCK (parse);
3661 res = gst_pad_push_event (parse->sinkpad, new_event);
3664 GST_OBJECT_LOCK (parse);
3665 parse->priv->pending_seeks =
3666 g_slist_remove (parse->priv->pending_seeks, seek);
3667 GST_OBJECT_UNLOCK (parse);
3673 /* handled event is ours to free */
3675 gst_event_unref (event);
3681 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
3687 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
3693 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
3699 /* Checks if bitrates are available from upstream tags so that we don't
3700 * override them later
3703 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
3705 GstTagList *taglist = NULL;
3708 gst_event_parse_tag (event, &taglist);
3710 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
3711 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
3712 parse->priv->post_min_bitrate = FALSE;
3714 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
3715 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
3716 parse->priv->post_avg_bitrate = FALSE;
3718 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
3719 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
3720 parse->priv->post_max_bitrate = FALSE;
3725 gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
3727 GstBaseParse *parse;
3728 GstBaseParseClass *klass;
3729 gboolean res = TRUE;
3731 parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
3732 klass = GST_BASE_PARSE_GET_CLASS (parse);
3734 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
3736 if (klass->set_sink_caps)
3737 res = klass->set_sink_caps (parse, caps);
3743 gst_base_parse_set_index (GstElement * element, GstIndex * index)
3745 GstBaseParse *parse = GST_BASE_PARSE (element);
3747 g_static_mutex_lock (&parse->priv->index_lock);
3748 if (parse->priv->index)
3749 gst_object_unref (parse->priv->index);
3751 parse->priv->index = gst_object_ref (index);
3752 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
3753 &parse->priv->index_id);
3754 parse->priv->own_index = FALSE;
3756 parse->priv->index = NULL;
3758 g_static_mutex_unlock (&parse->priv->index_lock);
3762 gst_base_parse_get_index (GstElement * element)
3764 GstBaseParse *parse = GST_BASE_PARSE (element);
3765 GstIndex *result = NULL;
3767 g_static_mutex_lock (&parse->priv->index_lock);
3768 if (parse->priv->index)
3769 result = gst_object_ref (parse->priv->index);
3770 g_static_mutex_unlock (&parse->priv->index_lock);
3775 static GstStateChangeReturn
3776 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
3778 GstBaseParse *parse;
3779 GstStateChangeReturn result;
3781 parse = GST_BASE_PARSE (element);
3783 switch (transition) {
3784 case GST_STATE_CHANGE_READY_TO_PAUSED:
3785 /* If this is our own index destroy it as the
3786 * old entries might be wrong for the new stream */
3787 g_static_mutex_lock (&parse->priv->index_lock);
3788 if (parse->priv->own_index) {
3789 gst_object_unref (parse->priv->index);
3790 parse->priv->index = NULL;
3791 parse->priv->own_index = FALSE;
3794 /* If no index was created, generate one */
3795 if (G_UNLIKELY (!parse->priv->index)) {
3796 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
3798 parse->priv->index = gst_index_factory_make ("memindex");
3799 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
3800 &parse->priv->index_id);
3801 parse->priv->own_index = TRUE;
3803 g_static_mutex_unlock (&parse->priv->index_lock);
3809 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
3811 switch (transition) {
3812 case GST_STATE_CHANGE_PAUSED_TO_READY:
3813 gst_base_parse_reset (parse);