2 * Copyright (C) 2008 Nokia Corporation. All rights reserved.
3 * Contact: Stefan Kost <stefan.kost@nokia.com>
4 * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
5 * Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
6 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 * SECTION:gstbaseparse
26 * @short_description: Base class for stream parsers
27 * @see_also: #GstBaseTransform
29 * This base class is for parser elements that process data and splits it
30 * into separate audio/video/whatever frames.
34 * <listitem><para>provides one sink pad and one source pad</para></listitem>
35 * <listitem><para>handles state changes</para></listitem>
36 * <listitem><para>can operate in pull mode or push mode</para></listitem>
37 * <listitem><para>handles seeking in both modes</para></listitem>
38 * <listitem><para>handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
40 * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
42 * <listitem><para>handles flushing</para></listitem>
45 * The purpose of this base class is to provide the basic functionality of
46 * a parser and share a lot of rather complex code.
48 * Description of the parsing mechanism:
51 * <itemizedlist><title>Set-up phase</title>
53 * GstBaseParse calls @start to inform subclass that data processing is
57 * GstBaseParse class calls @set_sink_caps to inform the subclass about
58 * incoming sinkpad caps. Subclass could already set the srcpad caps
59 * accordingly, but this might be delayed until calling
60 * gst_base_parse_finish_frame() with a non-queued frame.
63 * At least at this point subclass needs to tell the GstBaseParse class
64 * how big data chunks it wants to receive (min_frame_size). It can do
65 * this with gst_base_parse_set_min_frame_size().
68 * GstBaseParse class sets up appropriate data passing mode (pull/push)
69 * and starts to process the data.
75 * <title>Parsing phase</title>
77 * GstBaseParse gathers at least min_frame_size bytes of data either
78 * by pulling it from upstream or collecting buffers in an internal
82 * A buffer of (at least) min_frame_size bytes is passed to subclass with
83 * @handle_frame. Subclass checks the contents and can optionally
84 * return GST_FLOW_OK along with an amount of data to be skipped to find
85 * a valid frame (which will result in a subsequent DISCONT).
86 * If, otherwise, the buffer does not hold a complete frame,
87 * @handle_frame can merely return and will be called again when additional
88 * data is available. In push mode this amounts to an
89 * additional input buffer (thus minimal additional latency), in pull mode
90 * this amounts to some arbitrary reasonable buffer size increase.
91 * Of course, gst_base_parse_set_min_size() could also be used if a very
92 * specific known amount of additional data is required.
93 * If, however, the buffer holds a complete valid frame, it can pass
94 * the size of this frame to gst_base_parse_finish_frame().
95 * If acting as a converter, it can also merely indicate consumed input data
96 * while simultaneously providing custom output data.
97 * Note that baseclass performs some processing (such as tracking
98 * overall consumed data rate versus duration) for each finished frame,
99 * but other state is only updated upon each call to @handle_frame
100 * (such as tracking upstream input timestamp).
102 * Subclass is also responsible for setting the buffer metadata
103 * (e.g. buffer timestamp and duration, or keyframe if applicable).
104 * (although the latter can also be done by GstBaseParse if it is
105 * appropriately configured, see below). Frame is provided with
106 * timestamp derived from upstream (as much as generally possible),
107 * duration obtained from configuration (see below), and offset
108 * if meaningful (in pull mode).
110 * Note that @check_valid_frame might receive any small
111 * amount of input data when leftover data is being drained (e.g. at EOS).
114 * As part of finish frame processing,
115 * just prior to actually pushing the buffer in question,
116 * it is passed to @pre_push_frame which gives subclass yet one
117 * last chance to examine buffer metadata, or to send some custom (tag)
118 * events, or to perform custom (segment) filtering.
121 * During the parsing process GstBaseParseClass will handle both srcpad
122 * and sinkpad events. They will be passed to subclass if @event or
123 * @src_event callbacks have been provided.
128 * <itemizedlist><title>Shutdown phase</title>
130 * GstBaseParse class calls @stop to inform the subclass that data
131 * parsing will be stopped.
137 * Subclass is responsible for providing pad template caps for
138 * source and sink pads. The pads need to be named "sink" and "src". It also
139 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
140 * when base class calls subclass' @set_sink_caps function).
142 * This base class uses #GST_FORMAT_DEFAULT as a meaning of frames. So,
143 * subclass conversion routine needs to know that conversion from
144 * #GST_FORMAT_TIME to #GST_FORMAT_DEFAULT must return the
145 * frame number that can be found from the given byte position.
147 * GstBaseParse uses subclasses conversion methods also for seeking (or
148 * otherwise uses its own default one, see also below).
150 * Subclass @start and @stop functions will be called to inform the beginning
151 * and end of data processing.
153 * Things that subclass need to take care of:
155 * <listitem><para>Provide pad templates</para></listitem>
157 * Fixate the source pad caps when appropriate
160 * Inform base class how big data chunks should be retrieved. This is
161 * done with gst_base_parse_set_min_frame_size() function.
164 * Examine data chunks passed to subclass with @handle_frame and pass
165 * proper frame(s) to gst_base_parse_finish_frame(), and setting src pad
166 * caps and timestamps on frame.
168 * <listitem><para>Provide conversion functions</para></listitem>
170 * Update the duration information with gst_base_parse_set_duration()
173 * Optionally passthrough using gst_base_parse_set_passthrough()
176 * Configure various baseparse parameters using
177 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
178 * and gst_base_parse_set_frame_rate().
181 * In particular, if subclass is unable to determine a duration, but
182 * parsing (or specs) yields a frames per seconds rate, then this can be
183 * provided to GstBaseParse to enable it to cater for
184 * buffer time metadata (which will be taken from upstream as much as
185 * possible). Internally keeping track of frame durations and respective
186 * sizes that have been pushed provides GstBaseParse with an estimated
187 * bitrate. A default @convert (used if not overriden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
222 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
223 #define GST_CAT_DEFAULT gst_base_parse_debug
225 /* Supported formats */
226 static const GstFormat fmtlist[] = {
233 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
234 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
236 struct _GstBaseParsePrivate
243 GstFormat duration_fmt;
244 gint64 estimated_duration;
245 gint64 estimated_drift;
247 guint min_frame_size;
248 gboolean passthrough;
250 gboolean has_timing_info;
251 guint fps_num, fps_den;
252 gint update_interval;
254 guint lead_in, lead_out;
255 GstClockTime lead_in_ts, lead_out_ts;
256 GstClockTime min_latency, max_latency;
264 GstClockTime next_ts;
265 GstClockTime prev_ts;
266 GstClockTime frame_duration;
267 gboolean seen_keyframe;
273 guint64 data_bytecount;
274 guint64 acc_duration;
275 GstClockTime first_frame_ts;
276 gint64 first_frame_offset;
278 gboolean post_min_bitrate;
279 gboolean post_avg_bitrate;
280 gboolean post_max_bitrate;
284 guint posted_avg_bitrate;
286 GList *pending_events;
288 /* frames/buffers that are queued and ready to go on OK */
289 GQueue queued_frames;
293 /* index entry storage, either ours or provided */
299 /* seek table entries only maintained if upstream is BYTE seekable */
300 gboolean upstream_seekable;
301 gboolean upstream_has_duration;
302 gint64 upstream_size;
303 /* minimum distance between two index entries */
304 GstClockTimeDiff idx_interval;
305 /* ts and offset of last entry added */
306 GstClockTime index_last_ts;
307 gint64 index_last_offset;
308 gboolean index_last_valid;
310 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
311 gboolean exact_position;
312 /* seek events are temporarily kept to match them with newsegments */
313 GSList *pending_seeks;
315 /* reverse playback */
316 GSList *buffers_pending;
317 GSList *buffers_head;
318 GSList *buffers_queued;
319 GSList *buffers_send;
320 GstClockTime last_ts;
323 /* Newsegment event to be sent after SEEK */
324 GstEvent *pending_segment;
326 /* frame previously passed to subclass (might be re-used) */
327 GstBaseParseFrame *prev_frame;
328 /* offset corresponding to above frame */
330 /* whether we are merely scanning for a frame */
332 /* ... and resulting frame, if any */
333 GstBaseParseFrame *scanned_frame;
335 /* TRUE if we're still detecting the format, i.e.
336 * if ::detect() is still called for future buffers */
338 GList *detect_buffers;
339 guint detect_buffers_size;
342 typedef struct _GstBaseParseSeek
347 GstClockTime start_ts;
350 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
351 g_mutex_lock (&parse->priv->index_lock);
352 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
353 g_mutex_unlock (&parse->priv->index_lock);
355 static GstElementClass *parent_class = NULL;
357 static void gst_base_parse_class_init (GstBaseParseClass * klass);
358 static void gst_base_parse_init (GstBaseParse * parse,
359 GstBaseParseClass * klass);
362 gst_base_parse_get_type (void)
364 static volatile gsize base_parse_type = 0;
366 if (g_once_init_enter (&base_parse_type)) {
367 static const GTypeInfo base_parse_info = {
368 sizeof (GstBaseParseClass),
369 (GBaseInitFunc) NULL,
370 (GBaseFinalizeFunc) NULL,
371 (GClassInitFunc) gst_base_parse_class_init,
374 sizeof (GstBaseParse),
376 (GInstanceInitFunc) gst_base_parse_init,
380 _type = g_type_register_static (GST_TYPE_ELEMENT,
381 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
382 g_once_init_leave (&base_parse_type, _type);
384 return (GType) base_parse_type;
387 static void gst_base_parse_finalize (GObject * object);
389 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
390 GstStateChange transition);
391 static void gst_base_parse_reset (GstBaseParse * parse);
394 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
395 static GstIndex *gst_base_parse_get_index (GstElement * element);
398 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
400 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
401 GstObject * parent, GstPadMode mode, gboolean active);
402 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
404 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
406 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
408 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
411 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
413 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
416 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
418 static void gst_base_parse_loop (GstPad * pad);
420 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
421 GstBaseParseFrame * frame);
423 static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
426 static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
429 static void gst_base_parse_drain (GstBaseParse * parse);
431 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
432 gboolean post_min, gboolean post_avg, gboolean post_max);
434 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
435 GstClockTime time, gboolean before, GstClockTime * _ts);
436 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
437 GstClockTime * _time, gint64 * _offset);
439 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
440 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
443 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
445 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
448 gst_base_parse_clear_queues (GstBaseParse * parse)
450 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
451 g_slist_free (parse->priv->buffers_queued);
452 parse->priv->buffers_queued = NULL;
453 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
455 g_slist_free (parse->priv->buffers_pending);
456 parse->priv->buffers_pending = NULL;
457 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
458 g_slist_free (parse->priv->buffers_head);
459 parse->priv->buffers_head = NULL;
460 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
461 g_slist_free (parse->priv->buffers_send);
462 parse->priv->buffers_send = NULL;
464 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
465 g_list_free (parse->priv->detect_buffers);
466 parse->priv->detect_buffers = NULL;
467 parse->priv->detect_buffers_size = 0;
469 g_queue_foreach (&parse->priv->queued_frames,
470 (GFunc) gst_base_parse_frame_free, NULL);
471 g_queue_clear (&parse->priv->queued_frames);
475 gst_base_parse_finalize (GObject * object)
477 GstBaseParse *parse = GST_BASE_PARSE (object);
480 g_object_unref (parse->priv->adapter);
482 if (parse->priv->pending_segment) {
483 p_ev = &parse->priv->pending_segment;
484 gst_event_replace (p_ev, NULL);
487 if (parse->priv->cache) {
488 gst_buffer_unref (parse->priv->cache);
489 parse->priv->cache = NULL;
492 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
494 g_list_free (parse->priv->pending_events);
495 parse->priv->pending_events = NULL;
497 if (parse->priv->index) {
498 gst_object_unref (parse->priv->index);
499 parse->priv->index = NULL;
501 g_mutex_clear (&parse->priv->index_lock);
503 gst_base_parse_clear_queues (parse);
505 G_OBJECT_CLASS (parent_class)->finalize (object);
509 gst_base_parse_class_init (GstBaseParseClass * klass)
511 GObjectClass *gobject_class;
512 GstElementClass *gstelement_class;
514 gobject_class = G_OBJECT_CLASS (klass);
515 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
516 parent_class = g_type_class_peek_parent (klass);
517 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
519 gstelement_class = (GstElementClass *) klass;
520 gstelement_class->change_state =
521 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
524 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
525 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
528 /* Default handlers */
529 klass->event = gst_base_parse_sink_eventfunc;
530 klass->src_event = gst_base_parse_src_eventfunc;
531 klass->convert = gst_base_parse_convert_default;
533 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
534 "baseparse element");
538 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
540 GstPadTemplate *pad_template;
542 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
544 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
547 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
548 g_return_if_fail (pad_template != NULL);
549 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
550 gst_pad_set_event_function (parse->sinkpad,
551 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
552 gst_pad_set_query_function (parse->sinkpad,
553 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
554 gst_pad_set_chain_function (parse->sinkpad,
555 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
556 gst_pad_set_activate_function (parse->sinkpad,
557 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
558 gst_pad_set_activatemode_function (parse->sinkpad,
559 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
560 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
562 GST_DEBUG_OBJECT (parse, "sinkpad created");
565 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
566 g_return_if_fail (pad_template != NULL);
567 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
568 gst_pad_set_event_function (parse->srcpad,
569 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
570 gst_pad_set_query_function (parse->srcpad,
571 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
572 gst_pad_use_fixed_caps (parse->srcpad);
573 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
574 GST_DEBUG_OBJECT (parse, "src created");
576 g_queue_init (&parse->priv->queued_frames);
578 parse->priv->adapter = gst_adapter_new ();
580 parse->priv->pad_mode = GST_PAD_MODE_NONE;
582 g_mutex_init (&parse->priv->index_lock);
585 gst_base_parse_reset (parse);
586 GST_DEBUG_OBJECT (parse, "init ok");
588 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
591 static GstBaseParseFrame *
592 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
594 GstBaseParseFrame *copy;
596 copy = g_slice_dup (GstBaseParseFrame, frame);
597 copy->buffer = gst_buffer_ref (frame->buffer);
598 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
600 GST_TRACE ("copied frame %p -> %p", frame, copy);
606 gst_base_parse_frame_free (GstBaseParseFrame * frame)
608 GST_TRACE ("freeing frame %p", frame);
611 gst_buffer_unref (frame->buffer);
612 frame->buffer = NULL;
615 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
616 g_slice_free (GstBaseParseFrame, frame);
618 memset (frame, 0, sizeof (*frame));
622 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
623 (GBoxedCopyFunc) gst_base_parse_frame_copy,
624 (GBoxedFreeFunc) gst_base_parse_frame_free);
627 * gst_base_parse_frame_init:
628 * @frame: #GstBaseParseFrame.
630 * Sets a #GstBaseParseFrame to initial state. Currently this means
631 * all public fields are zero-ed and a private flag is set to make
632 * sure gst_base_parse_frame_free() only frees the contents but not
633 * the actual frame. Use this function to initialise a #GstBaseParseFrame
634 * allocated on the stack.
639 gst_base_parse_frame_init (GstBaseParseFrame * frame)
641 memset (frame, 0, sizeof (GstBaseParseFrame));
642 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
643 GST_TRACE ("inited frame %p", frame);
647 * gst_base_parse_frame_new:
648 * @buffer: (transfer none): a #GstBuffer
650 * @overhead: number of bytes in this frame which should be counted as
651 * metadata overhead, ie. not used to calculate the average bitrate.
652 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
654 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
655 * elements written in C should usually allocate the frame on the stack and
656 * then use gst_base_parse_frame_init() to initialise it.
658 * Returns: a newly-allocated #GstBaseParseFrame. Free with
659 * gst_base_parse_frame_free() when no longer needed, unless you gave
660 * away ownership to gst_base_parse_push_frame().
665 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
668 GstBaseParseFrame *frame;
670 frame = g_slice_new0 (GstBaseParseFrame);
671 frame->buffer = gst_buffer_ref (buffer);
673 GST_TRACE ("created frame %p", frame);
678 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
681 gst_buffer_replace (&frame->buffer, buf);
685 /* set flags one by one for clarity */
686 if (G_UNLIKELY (parse->priv->drain))
687 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
689 /* losing sync is pretty much a discont (and vice versa), no ? */
690 if (G_UNLIKELY (parse->priv->discont))
691 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
695 gst_base_parse_reset (GstBaseParse * parse)
697 GST_OBJECT_LOCK (parse);
698 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
699 parse->priv->duration = -1;
700 parse->priv->min_frame_size = 1;
701 parse->priv->discont = TRUE;
702 parse->priv->flushing = FALSE;
703 parse->priv->offset = 0;
704 parse->priv->sync_offset = 0;
705 parse->priv->update_interval = -1;
706 parse->priv->fps_num = parse->priv->fps_den = 0;
707 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
708 parse->priv->lead_in = parse->priv->lead_out = 0;
709 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
710 parse->priv->bitrate = 0;
711 parse->priv->framecount = 0;
712 parse->priv->bytecount = 0;
713 parse->priv->acc_duration = 0;
714 parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
715 parse->priv->first_frame_offset = -1;
716 parse->priv->estimated_duration = -1;
717 parse->priv->estimated_drift = 0;
718 parse->priv->next_ts = 0;
719 parse->priv->syncable = TRUE;
720 parse->priv->passthrough = FALSE;
721 parse->priv->has_timing_info = FALSE;
722 parse->priv->post_min_bitrate = TRUE;
723 parse->priv->post_avg_bitrate = TRUE;
724 parse->priv->post_max_bitrate = TRUE;
725 parse->priv->min_bitrate = G_MAXUINT;
726 parse->priv->max_bitrate = 0;
727 parse->priv->avg_bitrate = 0;
728 parse->priv->posted_avg_bitrate = 0;
730 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
731 parse->priv->index_last_offset = -1;
732 parse->priv->index_last_valid = TRUE;
733 parse->priv->upstream_seekable = FALSE;
734 parse->priv->upstream_size = 0;
735 parse->priv->upstream_has_duration = FALSE;
736 parse->priv->idx_interval = 0;
737 parse->priv->exact_position = TRUE;
738 parse->priv->seen_keyframe = FALSE;
740 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
741 parse->priv->last_offset = 0;
743 if (parse->priv->pending_segment) {
744 gst_event_unref (parse->priv->pending_segment);
745 parse->priv->pending_segment = NULL;
748 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
750 g_list_free (parse->priv->pending_events);
751 parse->priv->pending_events = NULL;
753 if (parse->priv->cache) {
754 gst_buffer_unref (parse->priv->cache);
755 parse->priv->cache = NULL;
758 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
759 g_slist_free (parse->priv->pending_seeks);
760 parse->priv->pending_seeks = NULL;
762 if (parse->priv->adapter)
763 gst_adapter_clear (parse->priv->adapter);
765 /* we know it is not alloc'ed, but maybe other stuff to free, some day ... */
766 if (parse->priv->prev_frame) {
767 gst_base_parse_frame_free (parse->priv->prev_frame);
768 parse->priv->prev_frame = NULL;
771 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
772 g_list_free (parse->priv->detect_buffers);
773 parse->priv->detect_buffers = NULL;
774 parse->priv->detect_buffers_size = 0;
775 GST_OBJECT_UNLOCK (parse);
778 /* gst_base_parse_parse_frame:
779 * @parse: #GstBaseParse.
780 * @buffer: #GstBuffer.
782 * Default callback for parse_frame.
785 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
787 GstBuffer *buffer = frame->buffer;
789 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
790 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
791 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
793 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
794 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
795 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
800 /* gst_base_parse_convert:
801 * @parse: #GstBaseParse.
802 * @src_format: #GstFormat describing the source format.
803 * @src_value: Source value to be converted.
804 * @dest_format: #GstFormat defining the converted format.
805 * @dest_value: Pointer where the conversion result will be put.
807 * Converts using configured "convert" vmethod in #GstBaseParse class.
809 * Returns: TRUE if conversion was successful.
812 gst_base_parse_convert (GstBaseParse * parse,
813 GstFormat src_format,
814 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
816 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
819 g_return_val_if_fail (dest_value != NULL, FALSE);
824 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
826 #ifndef GST_DISABLE_GST_DEBUG
829 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
830 GST_LOG_OBJECT (parse,
831 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
832 GST_TIME_ARGS (src_value), *dest_value);
833 } else if (dest_format == GST_FORMAT_TIME &&
834 src_format == GST_FORMAT_BYTES) {
835 GST_LOG_OBJECT (parse,
836 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
837 src_value, GST_TIME_ARGS (*dest_value));
839 GST_LOG_OBJECT (parse,
840 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
841 GST_STR_NULL (gst_format_get_name (src_format)),
842 GST_STR_NULL (gst_format_get_name (dest_format)),
843 src_value, *dest_value);
846 GST_DEBUG_OBJECT (parse, "conversion failed");
854 /* gst_base_parse_sink_event:
855 * @pad: #GstPad that received the event.
856 * @event: #GstEvent to be handled.
858 * Handler for sink pad events.
860 * Returns: TRUE if the event was handled.
863 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
866 GstBaseParseClass *bclass;
869 parse = GST_BASE_PARSE (parent);
870 bclass = GST_BASE_PARSE_GET_CLASS (parse);
872 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
873 GST_EVENT_TYPE_NAME (event));
875 /* Cache all events except EOS, SEGMENT and FLUSH_STOP if we have a
877 if (parse->priv->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
878 && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT
879 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
880 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP
881 && GST_EVENT_TYPE (event) != GST_EVENT_CAPS) {
883 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
884 /* See if any bitrate tags were posted */
885 gst_base_parse_handle_tag (parse, event);
887 parse->priv->pending_events =
888 g_list_append (parse->priv->pending_events, event);
892 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
893 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
894 /* We've not posted bitrate tags yet - do so now */
895 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
898 ret = bclass->event (parse, event);
903 GST_DEBUG_OBJECT (parse, "event handled");
909 /* gst_base_parse_sink_eventfunc:
910 * @parse: #GstBaseParse.
911 * @event: #GstEvent to be handled.
913 * Element-level event handler function.
915 * The event will be unreffed only if it has been handled and this
916 * function returns %TRUE
918 * Returns: %TRUE if the event was handled and not need forwarding.
921 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
926 switch (GST_EVENT_TYPE (event)) {
930 GstBaseParseClass *klass;
932 klass = GST_BASE_PARSE_GET_CLASS (parse);
934 gst_event_parse_caps (event, &caps);
935 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
937 if (klass->set_sink_caps)
938 ret = klass->set_sink_caps (parse, caps);
942 /* will send our own caps downstream */
943 gst_event_unref (event);
946 case GST_EVENT_SEGMENT:
948 const GstSegment *in_segment;
949 GstSegment out_segment;
950 gint64 offset = 0, next_ts;
953 gdouble rate, applied_rate;
955 gint64 start, stop, pos, next_ts;
959 gst_event_parse_segment (event, &in_segment);
960 gst_segment_init (&out_segment, GST_FORMAT_TIME);
962 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
964 if (in_segment->format == GST_FORMAT_BYTES) {
965 GstBaseParseSeek *seek = NULL;
968 /* stop time is allowed to be open-ended, but not start & pos */
969 offset = in_segment->time;
971 GST_OBJECT_LOCK (parse);
972 for (node = parse->priv->pending_seeks; node; node = node->next) {
973 GstBaseParseSeek *tmp = node->data;
975 if (tmp->offset == offset) {
980 parse->priv->pending_seeks =
981 g_slist_remove (parse->priv->pending_seeks, seek);
982 GST_OBJECT_UNLOCK (parse);
985 GST_DEBUG_OBJECT (parse,
986 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
987 seek->accurate ? " accurate" : "", &seek->segment);
989 out_segment.start = seek->segment.start;
990 out_segment.stop = seek->segment.stop;
991 out_segment.time = seek->segment.start;
993 next_ts = seek->start_ts;
994 parse->priv->exact_position = seek->accurate;
997 /* best attempt convert */
998 /* as these are only estimates, stop is kept open-ended to avoid
999 * premature cutting */
1000 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1001 GST_FORMAT_TIME, (gint64 *) & next_ts);
1003 out_segment.start = next_ts;
1004 out_segment.stop = GST_CLOCK_TIME_NONE;
1005 out_segment.time = next_ts;
1007 parse->priv->exact_position = (in_segment->start == 0);
1010 gst_event_unref (event);
1012 event = gst_event_new_segment (&out_segment);
1014 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1015 GST_SEGMENT_FORMAT, in_segment);
1017 } else if (in_segment->format != GST_FORMAT_TIME) {
1018 /* Unknown incoming segment format. Output a default open-ended
1020 gst_event_unref (event);
1022 out_segment.start = 0;
1023 out_segment.stop = GST_CLOCK_TIME_NONE;
1024 out_segment.time = 0;
1026 event = gst_event_new_segment (&out_segment);
1030 /* not considered BYTE seekable if it is talking to us in TIME,
1031 * whatever else it might claim */
1032 parse->priv->upstream_seekable = FALSE;
1033 next_ts = in_segment->start;
1036 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1039 gst_segment_set_newsegment (&parse->segment, update, rate,
1040 applied_rate, format, start, stop, start);
1043 /* save the segment for later, right before we push a new buffer so that
1044 * the caps are fixed and the next linked element can receive
1046 eventp = &parse->priv->pending_segment;
1047 gst_event_replace (eventp, event);
1048 gst_event_unref (event);
1051 /* but finish the current segment */
1052 GST_DEBUG_OBJECT (parse, "draining current segment");
1053 if (in_segment->rate > 0.0)
1054 gst_base_parse_drain (parse);
1056 gst_base_parse_finish_fragment (parse, FALSE);
1057 gst_adapter_clear (parse->priv->adapter);
1059 parse->priv->offset = offset;
1060 parse->priv->sync_offset = offset;
1061 parse->priv->next_ts = next_ts;
1062 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1063 parse->priv->discont = TRUE;
1064 parse->priv->seen_keyframe = FALSE;
1068 case GST_EVENT_FLUSH_START:
1069 parse->priv->flushing = TRUE;
1070 ret = gst_pad_push_event (parse->srcpad, event);
1071 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1072 GST_PAD_STREAM_LOCK (parse->srcpad);
1073 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1076 case GST_EVENT_FLUSH_STOP:
1077 ret = gst_pad_push_event (parse->srcpad, event);
1078 gst_adapter_clear (parse->priv->adapter);
1079 gst_base_parse_clear_queues (parse);
1080 parse->priv->flushing = FALSE;
1081 parse->priv->discont = TRUE;
1082 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1083 if (parse->priv->prev_frame) {
1084 gst_base_parse_frame_free (parse->priv->prev_frame);
1085 parse->priv->prev_frame = NULL;
1090 if (parse->segment.rate > 0.0)
1091 gst_base_parse_drain (parse);
1093 gst_base_parse_finish_fragment (parse, TRUE);
1095 /* If we STILL have zero frames processed, fire an error */
1096 if (parse->priv->framecount == 0) {
1097 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1098 ("No valid frames found before end of stream"), (NULL));
1100 /* newsegment before eos */
1101 if (parse->priv->pending_segment) {
1102 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
1103 parse->priv->pending_segment = NULL;
1105 ret = gst_pad_push_event (parse->srcpad, event);
1110 gst_pad_event_default (parse->sinkpad, GST_OBJECT_CAST (parse),
1118 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1120 GstBaseParse *parse;
1121 GstBaseParseClass *bclass;
1124 parse = GST_BASE_PARSE (parent);
1125 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1127 switch (GST_QUERY_TYPE (query)) {
1128 case GST_QUERY_CAPS:
1130 if (bclass->get_sink_caps) {
1131 GstCaps *caps, *filter;
1133 gst_query_parse_caps (query, &filter);
1134 caps = bclass->get_sink_caps (parse, filter);
1135 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1137 gst_query_set_caps_result (query, caps);
1138 gst_caps_unref (caps);
1142 GstCaps *caps, *template_caps, *filter;
1144 gst_query_parse_caps (query, &filter);
1145 template_caps = gst_pad_get_pad_template_caps (pad);
1146 if (filter != NULL) {
1148 gst_caps_intersect_full (filter, template_caps,
1149 GST_CAPS_INTERSECT_FIRST);
1150 gst_caps_unref (template_caps);
1152 caps = template_caps;
1154 gst_query_set_caps_result (query, caps);
1155 gst_caps_unref (caps);
1163 res = gst_pad_query_default (pad, parent, query);
1172 /* gst_base_parse_src_event:
1173 * @pad: #GstPad that received the event.
1174 * @event: #GstEvent that was received.
1176 * Handler for source pad events.
1178 * Returns: TRUE if the event was handled.
1181 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1183 GstBaseParse *parse;
1184 GstBaseParseClass *bclass;
1185 gboolean ret = TRUE;
1187 parse = GST_BASE_PARSE (parent);
1188 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1190 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1191 GST_EVENT_TYPE_NAME (event));
1193 if (bclass->src_event)
1194 ret = bclass->src_event (parse, event);
1196 gst_event_unref (event);
1202 gst_base_parse_is_seekable (GstBaseParse * parse)
1204 /* FIXME: could do more here, e.g. check index or just send data from 0
1205 * in pull mode and let decoder/sink clip */
1206 return parse->priv->syncable;
1209 /* gst_base_parse_src_eventfunc:
1210 * @parse: #GstBaseParse.
1211 * @event: #GstEvent that was received.
1213 * Default srcpad event handler.
1215 * Returns: TRUE if the event was handled and can be dropped.
1218 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1220 gboolean res = FALSE;
1222 switch (GST_EVENT_TYPE (event)) {
1223 case GST_EVENT_SEEK:
1224 if (gst_base_parse_is_seekable (parse))
1225 res = gst_base_parse_handle_seek (parse, event);
1228 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1237 * gst_base_parse_convert_default:
1238 * @parse: #GstBaseParse.
1239 * @src_format: #GstFormat describing the source format.
1240 * @src_value: Source value to be converted.
1241 * @dest_format: #GstFormat defining the converted format.
1242 * @dest_value: Pointer where the conversion result will be put.
1244 * Default implementation of "convert" vmethod in #GstBaseParse class.
1246 * Returns: TRUE if conversion was successful.
1251 gst_base_parse_convert_default (GstBaseParse * parse,
1252 GstFormat src_format,
1253 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1255 gboolean ret = FALSE;
1256 guint64 bytes, duration;
1258 if (G_UNLIKELY (src_format == dest_format)) {
1259 *dest_value = src_value;
1263 if (G_UNLIKELY (src_value == -1)) {
1268 if (G_UNLIKELY (src_value == 0)) {
1273 /* need at least some frames */
1274 if (!parse->priv->framecount)
1277 duration = parse->priv->acc_duration / GST_MSECOND;
1278 bytes = parse->priv->bytecount;
1280 if (G_UNLIKELY (!duration || !bytes))
1283 if (src_format == GST_FORMAT_BYTES) {
1284 if (dest_format == GST_FORMAT_TIME) {
1285 /* BYTES -> TIME conversion */
1286 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1287 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1288 *dest_value *= GST_MSECOND;
1289 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1290 *dest_value / GST_MSECOND);
1293 } else if (src_format == GST_FORMAT_TIME) {
1294 if (dest_format == GST_FORMAT_BYTES) {
1295 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1296 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1298 GST_DEBUG_OBJECT (parse,
1299 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1300 src_value / GST_MSECOND, *dest_value);
1303 } else if (src_format == GST_FORMAT_DEFAULT) {
1304 /* DEFAULT == frame-based */
1305 if (dest_format == GST_FORMAT_TIME) {
1306 if (parse->priv->fps_den) {
1307 *dest_value = gst_util_uint64_scale (src_value,
1308 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1311 } else if (dest_format == GST_FORMAT_BYTES) {
1319 gst_base_parse_update_duration (GstBaseParse * baseparse)
1322 GstBaseParse *parse;
1324 parse = GST_BASE_PARSE (baseparse);
1326 peer = gst_pad_get_peer (parse->sinkpad);
1328 gboolean qres = FALSE;
1329 gint64 ptot, dest_value;
1331 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1332 gst_object_unref (GST_OBJECT (peer));
1334 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1335 GST_FORMAT_TIME, &dest_value)) {
1337 /* inform if duration changed, but try to avoid spamming */
1338 parse->priv->estimated_drift +=
1339 dest_value - parse->priv->estimated_duration;
1340 if (parse->priv->estimated_drift > GST_SECOND ||
1341 parse->priv->estimated_drift < -GST_SECOND) {
1342 gst_element_post_message (GST_ELEMENT (parse),
1343 gst_message_new_duration (GST_OBJECT (parse),
1344 GST_FORMAT_TIME, dest_value));
1345 parse->priv->estimated_drift = 0;
1347 parse->priv->estimated_duration = dest_value;
1348 GST_LOG_OBJECT (parse,
1349 "updated estimated duration to %" GST_TIME_FORMAT,
1350 GST_TIME_ARGS (dest_value));
1357 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1358 gboolean post_avg, gboolean post_max)
1360 GstTagList *taglist = NULL;
1362 if (post_min && parse->priv->post_min_bitrate) {
1363 taglist = gst_tag_list_new_empty ();
1365 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1366 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1369 if (post_avg && parse->priv->post_avg_bitrate) {
1370 if (taglist == NULL)
1371 taglist = gst_tag_list_new_empty ();
1373 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1374 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1375 parse->priv->avg_bitrate, NULL);
1378 if (post_max && parse->priv->post_max_bitrate) {
1379 if (taglist == NULL)
1380 taglist = gst_tag_list_new_empty ();
1382 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1383 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1386 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1387 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1388 parse->priv->max_bitrate);
1390 if (taglist != NULL) {
1391 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1395 /* gst_base_parse_update_bitrates:
1396 * @parse: #GstBaseParse.
1397 * @buffer: Current frame as a #GstBuffer
1399 * Keeps track of the minimum and maximum bitrates, and also maintains a
1400 * running average bitrate of the stream so far.
1403 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1405 /* Only update the tag on a 10 kbps delta */
1406 static const gint update_threshold = 10000;
1408 guint64 data_len, frame_dur;
1409 gint overhead, frame_bitrate, old_avg_bitrate;
1410 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1411 GstBuffer *buffer = frame->buffer;
1413 overhead = frame->overhead;
1417 data_len = gst_buffer_get_size (buffer) - overhead;
1418 parse->priv->data_bytecount += data_len;
1420 /* duration should be valid by now,
1421 * either set by subclass or maybe based on fps settings */
1422 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1423 /* Calculate duration of a frame from buffer properties */
1424 frame_dur = GST_BUFFER_DURATION (buffer);
1425 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1426 parse->priv->acc_duration;
1429 /* No way to figure out frame duration (is this even possible?) */
1433 /* override if subclass provided bitrate, e.g. metadata based */
1434 if (parse->priv->bitrate) {
1435 parse->priv->avg_bitrate = parse->priv->bitrate;
1436 /* spread this (confirmed) info ASAP */
1437 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1438 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1442 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1446 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1447 parse->priv->avg_bitrate);
1449 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1451 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1452 /* always post all at threshold time */
1453 update_min = update_max = update_avg = TRUE;
1456 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1457 if (frame_bitrate < parse->priv->min_bitrate) {
1458 parse->priv->min_bitrate = frame_bitrate;
1462 if (frame_bitrate > parse->priv->max_bitrate) {
1463 parse->priv->max_bitrate = frame_bitrate;
1467 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1468 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1469 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1474 if ((update_min || update_avg || update_max))
1475 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1482 * gst_base_parse_add_index_entry:
1483 * @parse: #GstBaseParse.
1484 * @offset: offset of entry
1485 * @ts: timestamp associated with offset
1486 * @key: whether entry refers to keyframe
1487 * @force: add entry disregarding sanity checks
1489 * Adds an entry to the index associating @offset to @ts. It is recommended
1490 * to only add keyframe entries. @force allows to bypass checks, such as
1491 * whether the stream is (upstream) seekable, another entry is already "close"
1492 * to the new entry, etc.
1494 * Returns: #gboolean indicating whether entry was added
1499 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1500 GstClockTime ts, gboolean key, gboolean force)
1502 gboolean ret = FALSE;
1503 GstIndexAssociation associations[2];
1505 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1506 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1508 if (G_LIKELY (!force)) {
1510 if (!parse->priv->upstream_seekable) {
1511 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1515 /* FIXME need better helper data structure that handles these issues
1516 * related to ongoing collecting of index entries */
1517 if (parse->priv->index_last_offset >= (gint64) offset) {
1518 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1519 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1523 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1524 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1525 parse->priv->idx_interval) {
1526 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1527 GST_TIME_ARGS (parse->priv->index_last_ts));
1531 /* if last is not really the last one */
1532 if (!parse->priv->index_last_valid) {
1533 GstClockTime prev_ts;
1535 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1536 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1537 GST_DEBUG_OBJECT (parse,
1538 "entry too close to existing entry %" GST_TIME_FORMAT,
1539 GST_TIME_ARGS (prev_ts));
1540 parse->priv->index_last_offset = offset;
1541 parse->priv->index_last_ts = ts;
1547 associations[0].format = GST_FORMAT_TIME;
1548 associations[0].value = ts;
1549 associations[1].format = GST_FORMAT_BYTES;
1550 associations[1].value = offset;
1552 /* index might change on-the-fly, although that would be nutty app ... */
1553 GST_BASE_PARSE_INDEX_LOCK (parse);
1554 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1555 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1556 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1557 (const GstIndexAssociation *) &associations);
1558 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1561 parse->priv->index_last_offset = offset;
1562 parse->priv->index_last_ts = ts;
1571 /* check for seekable upstream, above and beyond a mere query */
1573 gst_base_parse_check_seekability (GstBaseParse * parse)
1576 gboolean seekable = FALSE;
1577 gint64 start = -1, stop = -1;
1578 guint idx_interval = 0;
1580 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1581 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1582 GST_DEBUG_OBJECT (parse, "seeking query failed");
1586 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1588 /* try harder to query upstream size if we didn't get it the first time */
1589 if (seekable && stop == -1) {
1590 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1591 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1594 /* if upstream doesn't know the size, it's likely that it's not seekable in
1595 * practice even if it technically may be seekable */
1596 if (seekable && (start != 0 || stop <= start)) {
1597 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1601 /* let's not put every single frame into our index */
1603 if (stop < 10 * 1024 * 1024)
1605 else if (stop < 100 * 1024 * 1024)
1608 idx_interval = 1000;
1612 gst_query_unref (query);
1614 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1615 G_GUINT64_FORMAT ")", seekable, start, stop);
1616 parse->priv->upstream_seekable = seekable;
1617 parse->priv->upstream_size = seekable ? stop : 0;
1619 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1620 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1623 /* some misc checks on upstream */
1625 gst_base_parse_check_upstream (GstBaseParse * parse)
1629 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1630 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1631 /* upstream has one, accept it also, and no further updates */
1632 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1633 parse->priv->upstream_has_duration = TRUE;
1636 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1637 parse->priv->upstream_has_duration);
1640 /* checks src caps to determine if dealing with audio or video */
1641 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1643 gst_base_parse_check_media (GstBaseParse * parse)
1648 caps = gst_pad_get_current_caps (parse->srcpad);
1649 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1650 parse->priv->is_video =
1651 g_str_has_prefix (gst_structure_get_name (s), "video");
1653 /* historical default */
1654 parse->priv->is_video = FALSE;
1657 gst_caps_unref (caps);
1659 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1662 /* takes ownership of frame */
1664 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1666 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1667 /* frame allocated on the heap, we can just take ownership */
1668 g_queue_push_tail (&parse->priv->queued_frames, frame);
1669 GST_TRACE ("queued frame %p", frame);
1671 GstBaseParseFrame *copy;
1673 /* probably allocated on the stack, must make a proper copy */
1674 copy = gst_base_parse_frame_copy (frame);
1675 g_queue_push_tail (&parse->priv->queued_frames, copy);
1676 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1677 gst_base_parse_frame_free (frame);
1681 /* makes sure that @buf is properly prepared and decorated for passing
1682 * to baseclass, and an equally setup frame is returned setup with @buf.
1683 * Takes ownership of @buf. */
1684 static GstBaseParseFrame *
1685 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1687 GstBaseParseFrame *frame = NULL;
1689 buffer = gst_buffer_make_writable (buffer);
1691 GST_LOG_OBJECT (parse,
1692 "preparing frame at offset %" G_GUINT64_FORMAT
1693 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1694 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1695 gst_buffer_get_size (buffer));
1697 if (parse->priv->discont) {
1698 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1699 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1700 parse->priv->discont = FALSE;
1703 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1705 if (parse->priv->prev_frame) {
1706 if (parse->priv->prev_offset == parse->priv->offset) {
1707 frame = parse->priv->prev_frame;
1709 gst_base_parse_frame_free (parse->priv->prev_frame);
1711 parse->priv->prev_frame = NULL;
1715 frame = gst_base_parse_frame_new (buffer, 0, 0);
1718 /* also ensure to update state flags */
1719 gst_base_parse_frame_update (parse, frame, buffer);
1720 gst_buffer_unref (buffer);
1722 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1724 /* use default handler to provide initial (upstream) metadata */
1725 gst_base_parse_parse_frame (parse, frame);
1731 gst_base_parse_unprepare_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1733 g_assert (parse->priv->prev_frame == NULL);
1735 parse->priv->prev_frame = frame;
1736 gst_base_parse_frame_update (parse, frame, NULL);
1739 /* Wraps buffer in a frame and dispatches to subclass.
1740 * Also manages data skipping and offset handling (including adapter flushing).
1741 * Takes ownership of @buffer */
1742 static GstFlowReturn
1743 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1744 gint * skip, gint * flushed)
1746 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1747 GstBaseParseFrame *frame;
1750 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1752 GST_LOG_OBJECT (parse,
1753 "handling buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1754 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1755 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1756 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1758 /* track what is being flushed during this single round of frame processing */
1759 parse->priv->flushed = 0;
1762 /* make it easy for _finish_frame to pick up input data */
1763 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1764 gst_buffer_ref (buffer);
1765 gst_adapter_push (parse->priv->adapter, buffer);
1768 frame = gst_base_parse_prepare_frame (parse, buffer);
1769 ret = klass->handle_frame (parse, frame, skip);
1770 gst_base_parse_unprepare_frame (parse, frame);
1772 *flushed = parse->priv->flushed;
1774 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1777 if (ret != GST_FLOW_OK) {
1778 GST_DEBUG_OBJECT (parse, "handle_frame returned %d", ret);
1782 /* subclass can only do one of these, or semantics are too unclear */
1783 g_assert (*skip == 0 || *flushed == 0);
1785 /* if it did something, clear frame state,
1786 * though this should also trigger the offset check anyway */
1787 if (*skip != 0 || *flushed != 0) {
1788 GST_LOG_OBJECT (parse, "clearing prev frame");
1789 gst_base_parse_frame_free (parse->priv->prev_frame);
1790 parse->priv->prev_frame = NULL;
1793 /* track skipping */
1795 GstClockTime timestamp;
1798 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1799 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1800 /* reverse playback, and no frames found yet, so we are skipping
1801 * the leading part of a fragment, which may form the tail of
1802 * fragment coming later, hopefully subclass skips efficiently ... */
1803 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
1804 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1805 outbuf = gst_buffer_make_writable (outbuf);
1806 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
1807 parse->priv->buffers_head =
1808 g_slist_prepend (parse->priv->buffers_head, outbuf);
1811 gst_adapter_flush (parse->priv->adapter, *skip);
1813 if (!parse->priv->discont)
1814 parse->priv->sync_offset = parse->priv->offset;
1815 parse->priv->offset += *skip;
1816 parse->priv->discont = TRUE;
1817 /* check for indefinite skipping */
1818 if (ret == GST_FLOW_OK)
1819 ret = gst_base_parse_check_sync (parse);
1822 parse->priv->offset += *flushed;
1825 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1826 gst_adapter_clear (parse->priv->adapter);
1832 /* gst_base_parse_handle_and_push_buffer:
1833 * @parse: #GstBaseParse.
1834 * @klass: #GstBaseParseClass.
1835 * @frame: (transfer full): a #GstBaseParseFrame
1837 * Parses the frame from given buffer and pushes it forward. Also performs
1838 * timestamp handling and checks the segment limits.
1840 * This is called with srcpad STREAM_LOCK held.
1842 * Returns: #GstFlowReturn
1844 static GstFlowReturn
1845 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1846 GstBaseParseFrame * frame)
1851 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1853 /* some one-time start-up */
1854 if (G_UNLIKELY (!parse->priv->framecount)) {
1855 gst_base_parse_check_seekability (parse);
1856 gst_base_parse_check_upstream (parse);
1859 buffer = frame->buffer;
1860 offset = frame->offset;
1862 /* check if subclass/format can provide ts.
1863 * If so, that allows and enables extra seek and duration determining options */
1864 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1865 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1866 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1867 parse->priv->first_frame_offset = offset;
1868 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1869 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1870 " for first frame at offset %" G_GINT64_FORMAT,
1871 GST_TIME_ARGS (parse->priv->first_frame_ts),
1872 parse->priv->first_frame_offset);
1873 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1875 GstClockTime last_ts = G_MAXINT64;
1877 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1878 gst_base_parse_locate_time (parse, &last_ts, &off);
1879 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1880 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1883 /* disable further checks */
1884 parse->priv->first_frame_offset = 0;
1888 /* again use default handler to add missing metadata;
1889 * we may have new information on frame properties */
1890 gst_base_parse_parse_frame (parse, frame);
1891 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1892 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1893 parse->priv->next_ts =
1894 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1896 /* we lost track, do not produce bogus time next time around
1897 * (probably means parser subclass has given up on parsing as well) */
1898 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1899 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1902 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1903 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1904 gst_base_parse_add_index_entry (parse, offset,
1905 GST_BUFFER_TIMESTAMP (buffer),
1906 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1908 /* All OK, push queued frames if there are any */
1909 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1910 GstBaseParseFrame *queued_frame;
1912 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1913 gst_base_parse_push_frame (parse, queued_frame);
1917 return gst_base_parse_push_frame (parse, frame);
1921 * gst_base_parse_push_frame:
1922 * @parse: #GstBaseParse.
1923 * @frame: (transfer none): a #GstBaseParseFrame
1925 * Pushes the frame's buffer downstream, sends any pending events and
1926 * does some timestamp and segment handling. Takes ownership of
1927 * frame's buffer, though caller retains ownership of @frame.
1929 * This must be called with sinkpad STREAM_LOCK held.
1931 * Returns: #GstFlowReturn
1936 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1938 GstFlowReturn ret = GST_FLOW_OK;
1939 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1940 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1941 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1945 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1946 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1948 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1950 buffer = frame->buffer;
1952 GST_LOG_OBJECT (parse,
1953 "processing buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1954 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1955 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1956 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1959 parse->priv->bytecount += frame->size;
1960 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1961 parse->priv->framecount++;
1962 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1963 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1966 /* 0 means disabled */
1967 if (parse->priv->update_interval < 0)
1968 parse->priv->update_interval = 50;
1969 else if (parse->priv->update_interval > 0 &&
1970 (parse->priv->framecount % parse->priv->update_interval) == 0)
1971 gst_base_parse_update_duration (parse);
1973 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1974 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1975 if (last_start != GST_CLOCK_TIME_NONE
1976 && GST_BUFFER_DURATION_IS_VALID (buffer))
1977 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1979 /* should have caps by now */
1980 if (!gst_pad_has_current_caps (parse->srcpad))
1983 /* segment adjustment magic; only if we are running the whole show */
1984 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
1985 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
1986 parse->priv->upstream_seekable)) {
1987 /* segment times are typically estimates,
1988 * actual frame data might lead subclass to different timestamps,
1989 * so override segment start from what is supplied there */
1990 if (G_UNLIKELY (parse->priv->pending_segment && !parse->priv->exact_position
1991 && GST_CLOCK_TIME_IS_VALID (last_start))) {
1992 gst_event_unref (parse->priv->pending_segment);
1993 parse->segment.start =
1994 MIN ((guint64) last_start, (guint64) parse->segment.stop);
1996 GST_DEBUG_OBJECT (parse,
1997 "adjusting pending segment start to %" GST_TIME_FORMAT,
1998 GST_TIME_ARGS (parse->segment.start));
2000 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
2002 /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
2003 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2004 GST_CLOCK_TIME_IS_VALID (last_start)) {
2005 GstClockTimeDiff diff;
2007 /* only send newsegments with increasing start times,
2008 * otherwise if these go back and forth downstream (sinks) increase
2009 * accumulated time and running_time */
2010 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2011 if (G_UNLIKELY (diff > 2 * GST_SECOND
2012 && last_start > parse->segment.start
2013 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2014 || last_start < parse->segment.stop))) {
2016 GST_DEBUG_OBJECT (parse,
2017 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2018 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2019 "Sending updated NEWSEGMENT events", diff,
2020 GST_TIME_ARGS (parse->segment.position),
2021 GST_TIME_ARGS (last_start));
2023 if (G_UNLIKELY (parse->priv->pending_segment)) {
2024 gst_event_unref (parse->priv->pending_segment);
2025 parse->segment.start = last_start;
2026 parse->segment.time = last_start;
2027 parse->priv->pending_segment =
2028 gst_event_new_segment (&parse->segment);
2030 /* skip gap FIXME */
2031 gst_pad_push_event (parse->srcpad,
2032 gst_event_new_segment (&parse->segment));
2034 parse->segment.position = last_start;
2039 if (G_UNLIKELY (parse->priv->pending_segment)) {
2040 GstEvent *pending_segment;
2042 pending_segment = parse->priv->pending_segment;
2043 parse->priv->pending_segment = NULL;
2045 GST_DEBUG_OBJECT (parse, "%s push pending segment",
2046 parse->priv->pad_mode == GST_PAD_MODE_PULL ? "loop" : "chain");
2047 gst_pad_push_event (parse->srcpad, pending_segment);
2049 /* have caps; check identity */
2050 gst_base_parse_check_media (parse);
2053 /* update bitrates and optionally post corresponding tags
2054 * (following newsegment) */
2055 gst_base_parse_update_bitrates (parse, frame);
2057 if (G_UNLIKELY (parse->priv->pending_events)) {
2060 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
2061 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2063 g_list_free (parse->priv->pending_events);
2064 parse->priv->pending_events = NULL;
2067 if (klass->pre_push_frame) {
2068 ret = klass->pre_push_frame (parse, frame);
2070 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2073 /* take final ownership of frame buffer */
2074 if (frame->out_buffer) {
2075 buffer = frame->out_buffer;
2076 frame->out_buffer = NULL;
2077 gst_buffer_replace (&frame->buffer, NULL);
2079 buffer = frame->buffer;
2080 frame->buffer = NULL;
2083 /* subclass must play nice */
2084 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2086 size = gst_buffer_get_size (buffer);
2088 parse->priv->seen_keyframe |= parse->priv->is_video &&
2089 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2091 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2092 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2093 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2094 GST_BUFFER_TIMESTAMP (buffer) >
2095 parse->segment.stop + parse->priv->lead_out_ts) {
2096 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2098 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2099 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2100 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2101 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2102 parse->priv->lead_in_ts < parse->segment.start) {
2103 if (parse->priv->seen_keyframe) {
2104 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2107 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2108 ret = GST_BASE_PARSE_FLOW_DROPPED;
2115 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2116 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2117 gst_buffer_unref (buffer);
2119 } else if (ret == GST_FLOW_OK) {
2120 if (parse->segment.rate > 0.0) {
2121 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2123 ret = gst_pad_push (parse->srcpad, buffer);
2124 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2126 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2128 parse->priv->buffers_queued =
2129 g_slist_prepend (parse->priv->buffers_queued, buffer);
2133 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2134 size, gst_flow_get_name (ret));
2135 gst_buffer_unref (buffer);
2136 /* if we are not sufficiently in control, let upstream decide on EOS */
2137 if (ret == GST_FLOW_EOS &&
2138 (parse->priv->passthrough ||
2139 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2140 !parse->priv->upstream_seekable)))
2144 /* Update current running segment position */
2145 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2146 parse->segment.position < last_stop)
2147 parse->segment.position = last_stop;
2154 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2155 return GST_FLOW_ERROR;
2160 * gst_base_parse_finish_frame:
2161 * @parse: a #GstBaseParse
2162 * @frame: a #GstBaseParseFrame
2163 * @size: consumed input data represented by frame
2165 * Collects parsed data and pushes this downstream.
2166 * Source pad caps must be set when this is called.
2168 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2169 * Otherwise, @size samples will be taken from the input and used for output,
2170 * and the output's metadata (timestamps etc) will be taken as (optionally)
2171 * set by the subclass on @frame's (input) buffer.
2173 * Note that the latter buffer is invalidated by this call, whereas the
2174 * caller retains ownership of @frame.
2176 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2181 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2184 GstFlowReturn ret = GST_FLOW_OK;
2186 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2187 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2188 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2189 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2192 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2193 "flushing size %d", frame->offset, size);
2195 if (parse->priv->scanning && frame->buffer) {
2196 if (!parse->priv->scanned_frame) {
2197 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2202 parse->priv->flushed += size;
2204 /* either PUSH or PULL mode arranges for adapter data */
2205 /* ensure output buffer */
2206 if (!frame->out_buffer) {
2207 GstBuffer *src, *dest;
2209 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2210 dest = frame->out_buffer;
2211 src = frame->buffer;
2212 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2213 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2214 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2215 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2216 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2217 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2219 gst_adapter_flush (parse->priv->adapter, size);
2222 /* use as input for subsequent processing */
2223 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2224 gst_buffer_unref (frame->out_buffer);
2225 frame->out_buffer = NULL;
2227 /* subclass might queue frames/data internally if it needs more
2228 * frames to decide on the format, or might request us to queue here. */
2229 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2230 gst_buffer_replace (&frame->buffer, NULL);
2232 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2233 GstBaseParseFrame *copy;
2235 copy = gst_base_parse_frame_copy (frame);
2236 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2237 gst_base_parse_queue_frame (parse, copy);
2241 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2247 /* gst_base_parse_drain:
2249 * Drains the adapter until it is empty. It decreases the min_frame_size to
2250 * match the current adapter size and calls chain method until the adapter
2251 * is emptied or chain returns with error.
2254 gst_base_parse_drain (GstBaseParse * parse)
2258 GST_DEBUG_OBJECT (parse, "draining");
2259 parse->priv->drain = TRUE;
2262 avail = gst_adapter_available (parse->priv->adapter);
2266 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2267 NULL) != GST_FLOW_OK) {
2271 /* nothing changed, maybe due to truncated frame; break infinite loop */
2272 if (avail == gst_adapter_available (parse->priv->adapter)) {
2273 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2274 gst_adapter_clear (parse->priv->adapter);
2278 parse->priv->drain = FALSE;
2281 /* gst_base_parse_send_buffers
2283 * Sends buffers collected in send_buffers downstream, and ensures that list
2284 * is empty at the end (errors or not).
2286 static GstFlowReturn
2287 gst_base_parse_send_buffers (GstBaseParse * parse)
2289 GSList *send = NULL;
2291 GstFlowReturn ret = GST_FLOW_OK;
2293 send = parse->priv->buffers_send;
2297 buf = GST_BUFFER_CAST (send->data);
2298 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
2299 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2300 ", offset %" G_GINT64_FORMAT, buf,
2301 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2302 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2304 /* iterate output queue an push downstream */
2305 ret = gst_pad_push (parse->srcpad, buf);
2306 send = g_slist_delete_link (send, send);
2308 /* clear any leftover if error */
2309 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2311 buf = GST_BUFFER_CAST (send->data);
2312 gst_buffer_unref (buf);
2313 send = g_slist_delete_link (send, send);
2318 parse->priv->buffers_send = send;
2323 /* gst_base_parse_start_fragment:
2325 * Prepares for processing a reverse playback (forward) fragment
2326 * by (re)setting proper state variables.
2328 static GstFlowReturn
2329 gst_base_parse_start_fragment (GstBaseParse * parse)
2331 GST_LOG_OBJECT (parse, "starting fragment");
2333 /* invalidate so no fall-back timestamping is performed;
2334 * ok if taken from subclass or upstream */
2335 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2336 parse->priv->prev_ts = GST_CLOCK_TIME_NONE;
2337 /* prevent it hanging around stop all the time */
2338 parse->segment.position = GST_CLOCK_TIME_NONE;
2340 parse->priv->discont = TRUE;
2342 /* head of previous fragment is now pending tail of current fragment */
2343 parse->priv->buffers_pending = parse->priv->buffers_head;
2344 parse->priv->buffers_head = NULL;
2350 /* gst_base_parse_finish_fragment:
2352 * Processes a reverse playback (forward) fragment:
2353 * - append head of last fragment that was skipped to current fragment data
2354 * - drain the resulting current fragment data (i.e. repeated chain)
2355 * - add time/duration (if needed) to frames queued by chain
2356 * - push queued data
2358 static GstFlowReturn
2359 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2362 GstFlowReturn ret = GST_FLOW_OK;
2363 gboolean seen_key = FALSE, seen_delta = FALSE;
2365 GST_LOG_OBJECT (parse, "finishing fragment");
2368 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2369 while (parse->priv->buffers_pending) {
2370 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2372 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2373 gst_buffer_get_size (buf));
2374 gst_adapter_push (parse->priv->adapter, buf);
2376 GST_LOG_OBJECT (parse, "discarding head buffer");
2377 gst_buffer_unref (buf);
2379 parse->priv->buffers_pending =
2380 g_slist_delete_link (parse->priv->buffers_pending,
2381 parse->priv->buffers_pending);
2384 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2385 /* initial skipped data is added to buffers_pending */
2386 gst_base_parse_drain (parse);
2388 if (parse->priv->buffers_send) {
2389 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2390 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2393 /* add metadata (if needed to queued buffers */
2394 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2395 GST_TIME_ARGS (parse->priv->last_ts));
2396 while (parse->priv->buffers_queued) {
2397 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2399 /* no touching if upstream or parsing provided time */
2400 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2401 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2402 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2403 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2404 GST_BUFFER_DURATION_IS_VALID (buf)) {
2405 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2406 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2408 parse->priv->last_ts = 0;
2409 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2410 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2411 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2413 /* no idea, very bad */
2414 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2417 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2419 /* reverse order for ascending sending */
2420 /* send downstream at keyframe not preceded by a keyframe
2421 * (e.g. that should identify start of collection of IDR nals) */
2422 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2424 ret = gst_base_parse_send_buffers (parse);
2425 /* if a problem, throw all to sending */
2426 if (ret != GST_FLOW_OK) {
2427 parse->priv->buffers_send =
2428 g_slist_reverse (parse->priv->buffers_queued);
2429 parse->priv->buffers_queued = NULL;
2439 parse->priv->buffers_send =
2440 g_slist_prepend (parse->priv->buffers_send, buf);
2441 parse->priv->buffers_queued =
2442 g_slist_delete_link (parse->priv->buffers_queued,
2443 parse->priv->buffers_queued);
2446 /* audio may have all marked as keyframe, so arrange to send here */
2448 ret = gst_base_parse_send_buffers (parse);
2450 /* any trailing unused no longer usable (ideally none) */
2451 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2452 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2453 gst_adapter_available (parse->priv->adapter));
2454 gst_adapter_clear (parse->priv->adapter);
2460 /* small helper that checks whether we have been trying to resync too long */
2461 static inline GstFlowReturn
2462 gst_base_parse_check_sync (GstBaseParse * parse)
2464 if (G_UNLIKELY (parse->priv->discont &&
2465 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2466 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2467 ("Failed to parse stream"), (NULL));
2468 return GST_FLOW_ERROR;
2474 static GstFlowReturn
2475 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2477 GstBaseParseClass *bclass;
2478 GstBaseParse *parse;
2479 GstFlowReturn ret = GST_FLOW_OK;
2480 GstBuffer *tmpbuf = NULL;
2485 GstClockTime timestamp;
2487 parse = GST_BASE_PARSE (parent);
2488 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2490 if (parse->priv->detecting) {
2491 GstBuffer *detect_buf;
2493 if (parse->priv->detect_buffers_size == 0) {
2494 detect_buf = gst_buffer_ref (buffer);
2499 detect_buf = gst_buffer_new ();
2501 for (l = parse->priv->detect_buffers; l; l = l->next) {
2502 gsize tmpsize = gst_buffer_get_size (l->data);
2504 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2505 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2509 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2510 offset, gst_buffer_get_size (buffer));
2513 ret = bclass->detect (parse, detect_buf);
2514 gst_buffer_unref (detect_buf);
2516 if (ret == GST_FLOW_OK) {
2519 /* Detected something */
2520 parse->priv->detecting = FALSE;
2522 for (l = parse->priv->detect_buffers; l; l = l->next) {
2523 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2525 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2526 parent, GST_BUFFER_CAST (l->data));
2528 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2530 g_list_free (parse->priv->detect_buffers);
2531 parse->priv->detect_buffers = NULL;
2532 parse->priv->detect_buffers_size = 0;
2534 if (ret != GST_FLOW_OK) {
2538 /* Handle the current buffer */
2539 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2540 /* Still detecting, append buffer or error out if draining */
2542 if (parse->priv->drain) {
2543 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2544 return GST_FLOW_ERROR;
2545 } else if (parse->priv->flushing) {
2546 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2548 g_list_free (parse->priv->detect_buffers);
2549 parse->priv->detect_buffers = NULL;
2550 parse->priv->detect_buffers_size = 0;
2552 parse->priv->detect_buffers =
2553 g_list_append (parse->priv->detect_buffers, buffer);
2554 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2558 /* Something went wrong, subclass responsible for error reporting */
2562 /* And now handle the current buffer if detection worked */
2565 if (G_LIKELY (buffer)) {
2566 GST_LOG_OBJECT (parse,
2567 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT,
2568 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer));
2569 if (G_UNLIKELY (parse->priv->passthrough)) {
2570 GstBaseParseFrame frame;
2572 gst_base_parse_frame_init (&frame);
2573 frame.buffer = gst_buffer_make_writable (buffer);
2574 ret = gst_base_parse_push_frame (parse, &frame);
2575 gst_base_parse_frame_free (&frame);
2578 /* upstream feeding us in reverse playback;
2579 * finish previous fragment and start new upon DISCONT */
2580 if (parse->segment.rate < 0.0) {
2581 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2582 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2583 ret = gst_base_parse_finish_fragment (parse, TRUE);
2584 gst_base_parse_start_fragment (parse);
2587 gst_adapter_push (parse->priv->adapter, buffer);
2590 /* Parse and push as many frames as possible */
2591 /* Stop either when adapter is empty or we are flushing */
2592 while (!parse->priv->flushing) {
2595 /* note: if subclass indicates MAX fsize,
2596 * this will not likely be available anyway ... */
2597 min_size = MAX (parse->priv->min_frame_size, fsize);
2598 av = gst_adapter_available (parse->priv->adapter);
2600 if (G_UNLIKELY (parse->priv->drain)) {
2602 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2603 if (G_UNLIKELY (!min_size)) {
2608 /* Collect at least min_frame_size bytes */
2609 if (av < min_size) {
2610 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2614 /* move along with upstream timestamp (if any),
2615 * but interpolate in between */
2616 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2617 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2618 (parse->priv->prev_ts != timestamp)) {
2619 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2622 /* always pass all available data */
2623 data = gst_adapter_map (parse->priv->adapter, av);
2624 /* arrange for actual data to be copied if subclass tries to,
2625 * since what is passed is tied to the adapter */
2626 tmpbuf = gst_buffer_new ();
2627 gst_buffer_take_memory (tmpbuf, -1,
2628 gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY |
2629 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, NULL, av, 0, av));
2631 /* keep the adapter mapped, so keep track of what has to be flushed */
2632 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2635 /* probably already implicitly unmapped due to adapter operation,
2636 * but for good measure ... */
2637 gst_adapter_unmap (parse->priv->adapter);
2638 if (ret != GST_FLOW_OK) {
2641 if (skip == 0 && flush == 0) {
2642 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2643 "breaking to get more data");
2649 GST_LOG_OBJECT (parse, "chain leaving");
2653 /* pull @size bytes at current offset,
2654 * i.e. at least try to and possibly return a shorter buffer if near the end */
2655 static GstFlowReturn
2656 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2657 GstBuffer ** buffer)
2659 GstFlowReturn ret = GST_FLOW_OK;
2661 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2663 /* Caching here actually makes much less difference than one would expect.
2664 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2665 if (parse->priv->cache) {
2666 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2667 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2669 if (cache_offset <= parse->priv->offset &&
2670 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2671 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2672 parse->priv->offset - cache_offset, size);
2673 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2676 /* not enough data in the cache, free cache and get a new one */
2677 gst_buffer_unref (parse->priv->cache);
2678 parse->priv->cache = NULL;
2681 /* refill the cache */
2683 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2684 64 * 1024), &parse->priv->cache);
2685 if (ret != GST_FLOW_OK) {
2686 parse->priv->cache = NULL;
2690 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2692 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2694 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2698 /* Not possible to get enough data, try a last time with
2699 * requesting exactly the size we need */
2700 gst_buffer_unref (parse->priv->cache);
2701 parse->priv->cache = NULL;
2703 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2704 &parse->priv->cache);
2706 if (ret != GST_FLOW_OK) {
2707 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2712 if (gst_buffer_get_size (parse->priv->cache) < size) {
2713 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2714 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2715 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2717 *buffer = parse->priv->cache;
2718 parse->priv->cache = NULL;
2724 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2725 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2730 static GstFlowReturn
2731 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2734 GstClockTime ts = 0;
2738 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2739 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2740 parse->priv->last_offset);
2742 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2743 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2744 GST_TIME_ARGS (parse->segment.start));
2749 /* last fragment started at last_offset / last_ts;
2750 * seek back 10s capped at 1MB */
2751 if (parse->priv->last_ts >= 10 * GST_SECOND)
2752 ts = parse->priv->last_ts - 10 * GST_SECOND;
2753 /* if we are exact now, we will be more so going backwards */
2754 if (parse->priv->exact_position) {
2755 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2757 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2758 GST_FORMAT_BYTES, &offset)) {
2759 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2762 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2763 parse->priv->last_offset - 1024);
2764 offset = MAX (0, offset);
2766 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2768 parse->priv->offset = offset;
2770 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2772 if (ret != GST_FLOW_OK)
2775 /* offset will increase again as fragment is processed/parsed */
2776 parse->priv->last_offset = offset;
2778 gst_base_parse_start_fragment (parse);
2779 gst_adapter_push (parse->priv->adapter, buffer);
2780 ret = gst_base_parse_finish_fragment (parse, TRUE);
2781 if (ret != GST_FLOW_OK)
2784 /* force previous fragment */
2785 parse->priv->offset = -1;
2792 * pull and scan for next frame starting from current offset
2793 * ajusts sync, drain and offset going along */
2794 static GstFlowReturn
2795 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2799 GstFlowReturn ret = GST_FLOW_OK;
2800 guint fsize, min_size;
2804 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2805 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2807 /* let's make this efficient for all subclass once and for all;
2808 * maybe it does not need this much, but in the latter case, we know we are
2809 * in pull mode here and might as well try to read and supply more anyway
2810 * (so does the buffer caching mechanism) */
2814 min_size = MAX (parse->priv->min_frame_size, fsize);
2816 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2818 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2819 if (ret != GST_FLOW_OK)
2822 /* if we got a short read, inform subclass we are draining leftover
2823 * and no more is to be expected */
2824 if (gst_buffer_get_size (buffer) < min_size) {
2825 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2826 parse->priv->drain = TRUE;
2829 if (parse->priv->detecting) {
2830 ret = klass->detect (parse, buffer);
2831 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2832 /* If draining we error out, otherwise request a buffer
2834 if (parse->priv->drain) {
2835 gst_buffer_unref (buffer);
2836 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2837 return GST_FLOW_ERROR;
2840 gst_buffer_unref (buffer);
2843 } else if (ret != GST_FLOW_OK) {
2844 gst_buffer_unref (buffer);
2845 GST_ERROR_OBJECT (parse, "detect() returned %s",
2846 gst_flow_get_name (ret));
2850 /* Else handle this buffer normally */
2853 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2854 if (ret != GST_FLOW_OK)
2857 /* something flushed means something happened,
2858 * and we should bail out of this loop so as not to occupy
2859 * the task thread indefinitely */
2861 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2864 /* nothing flushed, no skip and draining, so nothing left to do */
2865 if (!skip && parse->priv->drain) {
2866 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2867 "breaking loop and marking EOS");
2871 /* otherwise, get some more data
2872 * note that is checked this does not happen indefinitely */
2874 GST_LOG_OBJECT (parse, "getting some more data");
2877 parse->priv->drain = FALSE;
2884 /* Loop that is used in pull mode to retrieve data from upstream */
2886 gst_base_parse_loop (GstPad * pad)
2888 GstBaseParse *parse;
2889 GstBaseParseClass *klass;
2890 GstFlowReturn ret = GST_FLOW_OK;
2892 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2893 klass = GST_BASE_PARSE_GET_CLASS (parse);
2895 /* reverse playback:
2896 * first fragment (closest to stop time) is handled normally below,
2897 * then we pull in fragments going backwards */
2898 if (parse->segment.rate < 0.0) {
2899 /* check if we jumped back to a previous fragment,
2900 * which is a post-first fragment */
2901 if (parse->priv->offset < 0) {
2902 ret = gst_base_parse_handle_previous_fragment (parse);
2907 ret = gst_base_parse_scan_frame (parse, klass, TRUE);
2908 if (ret != GST_FLOW_OK)
2911 /* eat expected eos signalling past segment in reverse playback */
2912 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
2913 parse->segment.position >= parse->segment.stop) {
2914 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2915 /* push what was accumulated during loop run */
2916 gst_base_parse_finish_fragment (parse, FALSE);
2917 /* force previous fragment */
2918 parse->priv->offset = -1;
2923 if (ret == GST_FLOW_EOS)
2925 else if (ret != GST_FLOW_OK)
2928 gst_object_unref (parse);
2935 GST_DEBUG_OBJECT (parse, "eos");
2940 gboolean push_eos = FALSE;
2942 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2943 gst_flow_get_name (ret));
2944 gst_pad_pause_task (parse->sinkpad);
2946 if (ret == GST_FLOW_EOS) {
2947 /* handle end-of-stream/segment */
2948 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2951 if ((stop = parse->segment.stop) == -1)
2952 stop = parse->segment.duration;
2954 GST_DEBUG_OBJECT (parse, "sending segment_done");
2956 gst_element_post_message
2957 (GST_ELEMENT_CAST (parse),
2958 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2959 GST_FORMAT_TIME, stop));
2961 /* If we STILL have zero frames processed, fire an error */
2962 if (parse->priv->framecount == 0) {
2963 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2964 ("No valid frames found before end of stream"), (NULL));
2968 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
2969 /* for fatal errors we post an error message, wrong-state is
2970 * not fatal because it happens due to flushes and only means
2971 * that we should stop now. */
2972 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2973 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2977 /* newsegment before eos */
2978 if (parse->priv->pending_segment) {
2979 gst_pad_push_event (parse->srcpad, parse->priv->pending_segment);
2980 parse->priv->pending_segment = NULL;
2982 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
2984 gst_object_unref (parse);
2989 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
2991 GstBaseParse *parse;
2992 gboolean result = TRUE;
2996 parse = GST_BASE_PARSE (parent);
2998 GST_DEBUG_OBJECT (parse, "sink activate");
3000 query = gst_query_new_scheduling ();
3001 result = gst_pad_peer_query (sinkpad, query);
3003 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
3007 gst_query_unref (query);
3010 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3011 result = gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
3013 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3014 result = gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3017 GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
3022 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3024 GstBaseParseClass *klass;
3025 gboolean result = TRUE;
3027 GST_DEBUG_OBJECT (parse, "activate %d", active);
3029 klass = GST_BASE_PARSE_GET_CLASS (parse);
3032 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3033 result = klass->start (parse);
3035 /* If the subclass implements ::detect we want to
3036 * call it for the first buffers now */
3037 parse->priv->detecting = (klass->detect != NULL);
3039 /* We must make sure streaming has finished before resetting things
3040 * and calling the ::stop vfunc */
3041 GST_PAD_STREAM_LOCK (parse->sinkpad);
3042 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3044 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3045 result = klass->stop (parse);
3047 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3049 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3054 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3055 GstPadMode mode, gboolean active)
3057 gboolean result = TRUE;
3058 GstBaseParse *parse;
3060 parse = GST_BASE_PARSE (parent);
3062 GST_DEBUG_OBJECT (parse, "sink activate mode %d, %d", mode, active);
3064 result = gst_base_parse_activate (parse, active);
3068 case GST_PAD_MODE_PULL:
3070 parse->priv->pending_segment =
3071 gst_event_new_segment (&parse->segment);
3073 gst_pad_start_task (pad, (GstTaskFunction) gst_base_parse_loop,
3076 result &= gst_pad_stop_task (pad);
3084 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3086 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3092 * gst_base_parse_set_duration:
3093 * @parse: #GstBaseParse.
3095 * @duration: duration value.
3096 * @interval: how often to update the duration estimate based on bitrate, or 0.
3098 * Sets the duration of the currently playing media. Subclass can use this
3099 * when it is able to determine duration and/or notices a change in the media
3100 * duration. Alternatively, if @interval is non-zero (default), then stream
3101 * duration is determined based on estimated bitrate, and updated every @interval
3107 gst_base_parse_set_duration (GstBaseParse * parse,
3108 GstFormat fmt, gint64 duration, gint interval)
3110 g_return_if_fail (parse != NULL);
3112 if (parse->priv->upstream_has_duration) {
3113 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3117 if (duration != parse->priv->duration) {
3120 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
3121 gst_element_post_message (GST_ELEMENT (parse), m);
3123 /* TODO: what about duration tag? */
3125 parse->priv->duration = duration;
3126 parse->priv->duration_fmt = fmt;
3127 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3128 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3129 if (interval != 0) {
3130 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3134 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3135 parse->priv->update_interval = interval;
3141 * gst_base_parse_set_average_bitrate:
3142 * @parse: #GstBaseParse.
3143 * @bitrate: average bitrate in bits/second
3145 * Optionally sets the average bitrate detected in media (if non-zero),
3146 * e.g. based on metadata, as it will be posted to the application.
3148 * By default, announced average bitrate is estimated. The average bitrate
3149 * is used to estimate the total duration of the stream and to estimate
3150 * a seek position, if there's no index and the format is syncable
3151 * (see gst_base_parse_set_syncable()).
3156 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3158 parse->priv->bitrate = bitrate;
3159 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3163 * gst_base_parse_set_min_frame_size:
3164 * @parse: #GstBaseParse.
3165 * @min_size: Minimum size of the data that this base class should give to
3168 * Subclass can use this function to tell the base class that it needs to
3169 * give at least #min_size buffers.
3174 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3176 g_return_if_fail (parse != NULL);
3178 parse->priv->min_frame_size = min_size;
3179 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3183 * gst_base_parse_set_frame_rate:
3184 * @parse: the #GstBaseParse to set
3185 * @fps_num: frames per second (numerator).
3186 * @fps_den: frames per second (denominator).
3187 * @lead_in: frames needed before a segment for subsequent decode
3188 * @lead_out: frames needed after a segment
3190 * If frames per second is configured, parser can take care of buffer duration
3191 * and timestamping. When performing segment clipping, or seeking to a specific
3192 * location, a corresponding decoder might need an initial @lead_in and a
3193 * following @lead_out number of frames to ensure the desired segment is
3194 * entirely filled upon decoding.
3199 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3200 guint fps_den, guint lead_in, guint lead_out)
3202 g_return_if_fail (parse != NULL);
3204 parse->priv->fps_num = fps_num;
3205 parse->priv->fps_den = fps_den;
3206 if (!fps_num || !fps_den) {
3207 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3209 fps_num = fps_den = 0;
3210 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3211 parse->priv->lead_in = parse->priv->lead_out = 0;
3212 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3214 parse->priv->frame_duration =
3215 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3216 parse->priv->lead_in = lead_in;
3217 parse->priv->lead_out = lead_out;
3218 parse->priv->lead_in_ts =
3219 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3220 parse->priv->lead_out_ts =
3221 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3222 /* aim for about 1.5s to estimate duration */
3223 if (parse->priv->update_interval < 0) {
3224 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3225 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3226 parse->priv->update_interval);
3229 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3230 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3231 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3232 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3233 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3234 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3238 * gst_base_parse_set_has_timing_info:
3239 * @parse: a #GstBaseParse
3240 * @has_timing: whether frames carry timing information
3242 * Set if frames carry timing information which the subclass can (generally)
3243 * parse and provide. In particular, intrinsic (rather than estimated) time
3244 * can be obtained following a seek.
3249 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3251 parse->priv->has_timing_info = has_timing;
3252 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3256 * gst_base_parse_set_syncable:
3257 * @parse: a #GstBaseParse
3258 * @syncable: set if frame starts can be identified
3260 * Set if frame starts can be identified. This is set by default and
3261 * determines whether seeking based on bitrate averages
3262 * is possible for a format/stream.
3267 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3269 parse->priv->syncable = syncable;
3270 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3274 * gst_base_parse_set_passthrough:
3275 * @parse: a #GstBaseParse
3276 * @passthrough: %TRUE if parser should run in passthrough mode
3278 * Set if the nature of the format or configuration does not allow (much)
3279 * parsing, and the parser should operate in passthrough mode (which only
3280 * applies when operating in push mode). That is, incoming buffers are
3281 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3282 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3283 * so subclass can perform as much or as little is appropriate for
3284 * passthrough semantics in @pre_push_frame.
3289 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3291 parse->priv->passthrough = passthrough;
3292 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3296 * gst_base_parse_set_latency:
3297 * @parse: a #GstBaseParse
3298 * @min_latency: minimum parse latency
3299 * @max_latency: maximum parse latency
3301 * Sets the minimum and maximum (which may likely be equal) latency introduced
3302 * by the parsing process. If there is such a latency, which depends on the
3303 * particular parsing of the format, it typically corresponds to 1 frame duration.
3308 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3309 GstClockTime max_latency)
3311 GST_OBJECT_LOCK (parse);
3312 parse->priv->min_latency = min_latency;
3313 parse->priv->max_latency = max_latency;
3314 GST_OBJECT_UNLOCK (parse);
3315 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3316 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3317 GST_TIME_ARGS (max_latency));
3321 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3322 GstClockTime * duration)
3324 gboolean res = FALSE;
3326 g_return_val_if_fail (duration != NULL, FALSE);
3328 *duration = GST_CLOCK_TIME_NONE;
3329 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3330 GST_LOG_OBJECT (parse, "using provided duration");
3331 *duration = parse->priv->duration;
3333 } else if (parse->priv->duration != -1) {
3334 GST_LOG_OBJECT (parse, "converting provided duration");
3335 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3336 parse->priv->duration, format, (gint64 *) duration);
3337 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3338 GST_LOG_OBJECT (parse, "using estimated duration");
3339 *duration = parse->priv->estimated_duration;
3342 GST_LOG_OBJECT (parse, "cannot estimate duration");
3345 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3346 GST_TIME_ARGS (*duration));
3351 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
3353 GstBaseParse *parse;
3354 gboolean res = FALSE;
3356 parse = GST_BASE_PARSE (parent);
3358 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3360 switch (GST_QUERY_TYPE (query)) {
3361 case GST_QUERY_POSITION:
3366 GST_DEBUG_OBJECT (parse, "position query");
3367 gst_query_parse_position (query, &format, NULL);
3369 /* try upstream first */
3370 res = gst_pad_query_default (pad, parent, query);
3372 /* Fall back on interpreting segment */
3373 GST_OBJECT_LOCK (parse);
3374 if (format == GST_FORMAT_BYTES) {
3375 dest_value = parse->priv->offset;
3377 } else if (format == parse->segment.format &&
3378 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3379 dest_value = gst_segment_to_stream_time (&parse->segment,
3380 parse->segment.format, parse->segment.position);
3383 GST_OBJECT_UNLOCK (parse);
3385 /* no precise result, upstream no idea either, then best estimate */
3386 /* priv->offset is updated in both PUSH/PULL modes */
3387 res = gst_base_parse_convert (parse,
3388 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3391 gst_query_set_position (query, format, dest_value);
3395 case GST_QUERY_DURATION:
3398 GstClockTime duration;
3400 GST_DEBUG_OBJECT (parse, "duration query");
3401 gst_query_parse_duration (query, &format, NULL);
3403 /* consult upstream */
3404 res = gst_pad_query_default (pad, parent, query);
3406 /* otherwise best estimate from us */
3408 res = gst_base_parse_get_duration (parse, format, &duration);
3410 gst_query_set_duration (query, format, duration);
3414 case GST_QUERY_SEEKING:
3417 GstClockTime duration = GST_CLOCK_TIME_NONE;
3418 gboolean seekable = FALSE;
3420 GST_DEBUG_OBJECT (parse, "seeking query");
3421 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3423 /* consult upstream */
3424 res = gst_pad_query_default (pad, parent, query);
3426 /* we may be able to help if in TIME */
3427 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3428 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3429 /* already OK if upstream takes care */
3430 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3432 if (!(res && seekable)) {
3433 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3434 || duration == -1) {
3435 /* seekable if we still have a chance to get duration later on */
3437 parse->priv->upstream_seekable && parse->priv->update_interval;
3439 seekable = parse->priv->upstream_seekable;
3440 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3443 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3449 case GST_QUERY_FORMATS:
3450 gst_query_set_formatsv (query, 3, fmtlist);
3453 case GST_QUERY_CONVERT:
3455 GstFormat src_format, dest_format;
3456 gint64 src_value, dest_value;
3458 gst_query_parse_convert (query, &src_format, &src_value,
3459 &dest_format, &dest_value);
3461 res = gst_base_parse_convert (parse, src_format, src_value,
3462 dest_format, &dest_value);
3464 gst_query_set_convert (query, src_format, src_value,
3465 dest_format, dest_value);
3469 case GST_QUERY_LATENCY:
3471 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3473 GstClockTime min_latency, max_latency;
3475 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3476 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3477 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3478 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3480 GST_OBJECT_LOCK (parse);
3481 /* add our latency */
3482 if (min_latency != -1)
3483 min_latency += parse->priv->min_latency;
3484 if (max_latency != -1)
3485 max_latency += parse->priv->max_latency;
3486 GST_OBJECT_UNLOCK (parse);
3488 gst_query_set_latency (query, live, min_latency, max_latency);
3493 res = gst_pad_query_default (pad, parent, query);
3499 /* scans for a cluster start from @pos,
3500 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3501 static GstFlowReturn
3502 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3503 GstClockTime * time, GstClockTime * duration)
3505 GstBaseParseClass *klass;
3507 gboolean orig_drain, orig_discont;
3508 GstFlowReturn ret = GST_FLOW_OK;
3509 GstBuffer *buf = NULL;
3510 GstBaseParseFrame *sframe = NULL;
3512 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3513 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3514 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3516 klass = GST_BASE_PARSE_GET_CLASS (parse);
3518 *time = GST_CLOCK_TIME_NONE;
3519 *duration = GST_CLOCK_TIME_NONE;
3522 orig_offset = parse->priv->offset;
3523 orig_discont = parse->priv->discont;
3524 orig_drain = parse->priv->drain;
3526 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3527 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3529 /* jump elsewhere and locate next frame */
3530 parse->priv->offset = *pos;
3531 /* mark as scanning so frames don't get processed all the way */
3532 parse->priv->scanning = TRUE;
3533 ret = gst_base_parse_scan_frame (parse, klass, FALSE);
3534 parse->priv->scanning = FALSE;
3535 /* retrieve frame found during scan */
3536 sframe = parse->priv->scanned_frame;
3537 parse->priv->scanned_frame = NULL;
3539 if (ret != GST_FLOW_OK || !sframe)
3542 /* get offset first, subclass parsing might dump other stuff in there */
3543 *pos = sframe->offset;
3544 buf = sframe->buffer;
3547 /* but it should provide proper time */
3548 *time = GST_BUFFER_TIMESTAMP (buf);
3549 *duration = GST_BUFFER_DURATION (buf);
3551 GST_LOG_OBJECT (parse,
3552 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3553 GST_TIME_ARGS (*time), *pos);
3557 gst_base_parse_frame_free (sframe);
3560 parse->priv->offset = orig_offset;
3561 parse->priv->discont = orig_discont;
3562 parse->priv->drain = orig_drain;
3567 /* bisect and scan through file for frame starting before @time,
3568 * returns OK and @time/@offset if found, NONE and/or error otherwise
3569 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3570 static GstFlowReturn
3571 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3574 GstFlowReturn ret = GST_FLOW_OK;
3575 gint64 lpos, hpos, newpos;
3576 GstClockTime time, ltime, htime, newtime, dur;
3577 gboolean cont = TRUE;
3578 const GstClockTime tolerance = TARGET_DIFFERENCE;
3579 const guint chunk = 4 * 1024;
3581 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3582 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3584 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3585 GST_TIME_ARGS (*_time));
3587 /* TODO also make keyframe aware if useful some day */
3602 /* do not know at first */
3604 *_time = GST_CLOCK_TIME_NONE;
3606 /* need initial positions; start and end */
3607 lpos = parse->priv->first_frame_offset;
3608 ltime = parse->priv->first_frame_ts;
3609 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3610 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3611 return GST_FLOW_ERROR;
3613 hpos = parse->priv->upstream_size;
3615 GST_DEBUG_OBJECT (parse,
3616 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3617 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3618 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3620 /* check preconditions are satisfied;
3621 * start and end are needed, except for special case where we scan for
3622 * last frame to determine duration */
3623 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3624 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3625 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3629 /* shortcut cases */
3632 } else if (time < ltime + tolerance) {
3636 } else if (time >= htime) {
3642 while (htime > ltime && cont) {
3643 GST_LOG_OBJECT (parse,
3644 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3645 GST_TIME_ARGS (ltime));
3646 GST_LOG_OBJECT (parse,
3647 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3648 GST_TIME_ARGS (htime));
3649 if (G_UNLIKELY (time == G_MAXINT64)) {
3651 } else if (G_LIKELY (hpos > lpos)) {
3653 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3656 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3658 /* we check this case once, but not forever, so break loop */
3663 newpos = CLAMP (newpos, lpos, hpos);
3664 GST_LOG_OBJECT (parse,
3665 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3666 GST_TIME_ARGS (time), newpos);
3668 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3669 if (ret == GST_FLOW_EOS) {
3670 /* heuristic HACK */
3671 hpos = MAX (lpos, hpos - chunk);
3673 } else if (ret != GST_FLOW_OK) {
3677 if (newtime == -1 || newpos == -1) {
3678 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3682 if (G_UNLIKELY (time == G_MAXINT64)) {
3685 if (GST_CLOCK_TIME_IS_VALID (dur))
3688 } else if (newtime > time) {
3690 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3692 } else if (newtime + tolerance > time) {
3693 /* close enough undershoot */
3697 } else if (newtime < ltime) {
3698 /* so a position beyond lpos resulted in earlier time than ltime ... */
3699 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3702 /* undershoot too far */
3703 newpos += newpos == lpos ? chunk : 0;
3704 lpos = CLAMP (newpos, lpos, hpos);
3710 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3711 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3716 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3717 gboolean before, GstClockTime * _ts)
3719 gint64 bytes = 0, ts = 0;
3720 GstIndexEntry *entry = NULL;
3722 if (time == GST_CLOCK_TIME_NONE) {
3728 GST_BASE_PARSE_INDEX_LOCK (parse);
3729 if (parse->priv->index) {
3730 /* Let's check if we have an index entry for that time */
3731 entry = gst_index_get_assoc_entry (parse->priv->index,
3732 parse->priv->index_id,
3733 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3734 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3738 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3739 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3741 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3742 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3743 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3745 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3746 GST_TIME_ARGS (time));
3749 ts = GST_CLOCK_TIME_NONE;
3752 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3761 /* returns TRUE if seek succeeded */
3763 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3768 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3769 gboolean flush, update, res = TRUE, accurate;
3770 gint64 cur, stop, seekpos, seekstop;
3771 GstSegment seeksegment = { 0, };
3772 GstClockTime start_ts;
3774 gst_event_parse_seek (event, &rate, &format, &flags,
3775 &cur_type, &cur, &stop_type, &stop);
3777 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3778 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3779 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3780 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3782 /* no negative rates in push mode */
3783 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3786 if (cur_type != GST_SEEK_TYPE_SET ||
3787 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3790 /* For any format other than TIME, see if upstream handles
3791 * it directly or fail. For TIME, try upstream, but do it ourselves if
3792 * it fails upstream */
3793 res = gst_pad_push_event (parse->sinkpad, event);
3794 if (format != GST_FORMAT_TIME || res)
3797 /* get flush flag */
3798 flush = flags & GST_SEEK_FLAG_FLUSH;
3800 /* copy segment, we need this because we still need the old
3801 * segment when we close the current segment. */
3802 gst_segment_copy_into (&parse->segment, &seeksegment);
3804 GST_DEBUG_OBJECT (parse, "configuring seek");
3805 gst_segment_do_seek (&seeksegment, rate, format, flags,
3806 cur_type, cur, stop_type, stop, &update);
3808 /* accurate seeking implies seek tables are used to obtain position,
3809 * and the requested segment is maintained exactly, not adjusted any way */
3810 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3812 /* maybe we can be accurate for (almost) free */
3813 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3814 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3815 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3819 GstClockTime startpos = seeksegment.position;
3821 /* accurate requested, so ... seek a bit before target */
3822 if (startpos < parse->priv->lead_in_ts)
3825 startpos -= parse->priv->lead_in_ts;
3826 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3827 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3830 start_ts = seeksegment.position;
3831 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.position,
3832 GST_FORMAT_BYTES, &seekpos))
3833 goto convert_failed;
3834 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3835 GST_FORMAT_BYTES, &seekstop))
3836 goto convert_failed;
3839 GST_DEBUG_OBJECT (parse,
3840 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3842 GST_DEBUG_OBJECT (parse,
3843 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3844 seeksegment.stop, seekstop);
3846 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
3849 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3852 if (parse->srcpad) {
3853 GST_DEBUG_OBJECT (parse, "sending flush start");
3854 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3855 /* unlock upstream pull_range */
3856 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3859 gst_pad_pause_task (parse->sinkpad);
3862 /* we should now be able to grab the streaming thread because we stopped it
3863 * with the above flush/pause code */
3864 GST_PAD_STREAM_LOCK (parse->sinkpad);
3866 /* save current position */
3867 last_stop = parse->segment.position;
3868 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3871 /* now commit to new position */
3873 /* prepare for streaming again */
3875 GST_DEBUG_OBJECT (parse, "sending flush stop");
3876 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
3877 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
3878 gst_base_parse_clear_queues (parse);
3880 /* keep track of our position */
3881 seeksegment.base = gst_segment_to_running_time (&seeksegment,
3882 seeksegment.format, parse->segment.position);
3885 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3887 /* store the newsegment event so it can be sent from the streaming thread. */
3888 if (parse->priv->pending_segment)
3889 gst_event_unref (parse->priv->pending_segment);
3891 /* This will be sent later in _loop() */
3892 parse->priv->pending_segment = gst_event_new_segment (&parse->segment);
3894 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3895 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3896 ", pos = %" GST_TIME_FORMAT, format,
3897 GST_TIME_ARGS (parse->segment.start),
3898 GST_TIME_ARGS (parse->segment.stop),
3899 GST_TIME_ARGS (parse->segment.start));
3901 /* one last chance in pull mode to stay accurate;
3902 * maybe scan and subclass can find where to go */
3905 GstClockTime ts = seeksegment.position;
3907 gst_base_parse_locate_time (parse, &ts, &scanpos);
3911 /* running collected index now consists of several intervals,
3912 * so optimized check no longer possible */
3913 parse->priv->index_last_valid = FALSE;
3914 parse->priv->index_last_offset = 0;
3915 parse->priv->index_last_ts = 0;
3919 /* mark discont if we are going to stream from another position. */
3920 if (seekpos != parse->priv->offset) {
3921 GST_DEBUG_OBJECT (parse,
3922 "mark DISCONT, we did a seek to another position");
3923 parse->priv->offset = seekpos;
3924 parse->priv->last_offset = seekpos;
3925 parse->priv->seen_keyframe = FALSE;
3926 parse->priv->discont = TRUE;
3927 parse->priv->next_ts = start_ts;
3928 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3929 parse->priv->sync_offset = seekpos;
3930 parse->priv->exact_position = accurate;
3933 /* Start streaming thread if paused */
3934 gst_pad_start_task (parse->sinkpad,
3935 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3937 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3942 GstEvent *new_event;
3943 GstBaseParseSeek *seek;
3944 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
3946 /* The only thing we need to do in PUSH-mode is to send the
3947 seek event (in bytes) to upstream. Segment / flush handling happens
3948 in corresponding src event handlers */
3949 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3950 if (seekstop >= 0 && seekstop <= seekpos)
3952 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
3953 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3955 /* store segment info so its precise details can be reconstructed when
3956 * receiving newsegment;
3957 * this matters for all details when accurate seeking,
3958 * is most useful to preserve NONE stop time otherwise */
3959 seek = g_new0 (GstBaseParseSeek, 1);
3960 seek->segment = seeksegment;
3961 seek->accurate = accurate;
3962 seek->offset = seekpos;
3963 seek->start_ts = start_ts;
3964 GST_OBJECT_LOCK (parse);
3965 /* less optimal, but preserves order */
3966 parse->priv->pending_seeks =
3967 g_slist_append (parse->priv->pending_seeks, seek);
3968 GST_OBJECT_UNLOCK (parse);
3970 res = gst_pad_push_event (parse->sinkpad, new_event);
3973 GST_OBJECT_LOCK (parse);
3974 parse->priv->pending_seeks =
3975 g_slist_remove (parse->priv->pending_seeks, seek);
3976 GST_OBJECT_UNLOCK (parse);
3987 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
3993 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
3999 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4005 /* Checks if bitrates are available from upstream tags so that we don't
4006 * override them later
4009 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4011 GstTagList *taglist = NULL;
4014 gst_event_parse_tag (event, &taglist);
4016 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4017 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4018 parse->priv->post_min_bitrate = FALSE;
4020 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4021 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4022 parse->priv->post_avg_bitrate = FALSE;
4024 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4025 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4026 parse->priv->post_max_bitrate = FALSE;
4032 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4034 GstBaseParse *parse = GST_BASE_PARSE (element);
4036 GST_BASE_PARSE_INDEX_LOCK (parse);
4037 if (parse->priv->index)
4038 gst_object_unref (parse->priv->index);
4040 parse->priv->index = gst_object_ref (index);
4041 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4042 &parse->priv->index_id);
4043 parse->priv->own_index = FALSE;
4045 parse->priv->index = NULL;
4047 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4051 gst_base_parse_get_index (GstElement * element)
4053 GstBaseParse *parse = GST_BASE_PARSE (element);
4054 GstIndex *result = NULL;
4056 GST_BASE_PARSE_INDEX_LOCK (parse);
4057 if (parse->priv->index)
4058 result = gst_object_ref (parse->priv->index);
4059 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4065 static GstStateChangeReturn
4066 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4068 GstBaseParse *parse;
4069 GstStateChangeReturn result;
4071 parse = GST_BASE_PARSE (element);
4073 switch (transition) {
4074 case GST_STATE_CHANGE_READY_TO_PAUSED:
4075 /* If this is our own index destroy it as the
4076 * old entries might be wrong for the new stream */
4077 GST_BASE_PARSE_INDEX_LOCK (parse);
4078 if (parse->priv->own_index) {
4079 gst_object_unref (parse->priv->index);
4080 parse->priv->index = NULL;
4081 parse->priv->own_index = FALSE;
4084 /* If no index was created, generate one */
4085 if (G_UNLIKELY (!parse->priv->index)) {
4086 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4088 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4089 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4090 &parse->priv->index_id);
4091 parse->priv->own_index = TRUE;
4093 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4099 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4101 switch (transition) {
4102 case GST_STATE_CHANGE_PAUSED_TO_READY:
4103 gst_base_parse_reset (parse);