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 /* frames/buffers that are queued and ready to go on OK */
287 GQueue queued_frames;
291 /* index entry storage, either ours or provided */
297 /* seek table entries only maintained if upstream is BYTE seekable */
298 gboolean upstream_seekable;
299 gboolean upstream_has_duration;
300 gint64 upstream_size;
301 /* minimum distance between two index entries */
302 GstClockTimeDiff idx_interval;
303 /* ts and offset of last entry added */
304 GstClockTime index_last_ts;
305 gint64 index_last_offset;
306 gboolean index_last_valid;
308 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
309 gboolean exact_position;
310 /* seek events are temporarily kept to match them with newsegments */
311 GSList *pending_seeks;
313 /* reverse playback */
314 GSList *buffers_pending;
315 GSList *buffers_head;
316 GSList *buffers_queued;
317 GSList *buffers_send;
318 GstClockTime last_ts;
321 /* Pending serialized events */
322 GList *pending_events;
323 /* Newsegment event to be sent after SEEK */
324 gboolean pending_segment;
326 /* offset of last parsed frame/data */
328 /* force a new frame, regardless of offset */
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);
473 gst_buffer_replace (&parse->priv->cache, NULL);
475 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
476 g_list_free (parse->priv->pending_events);
477 parse->priv->pending_events = NULL;
478 parse->priv->pending_segment = FALSE;
482 gst_base_parse_finalize (GObject * object)
484 GstBaseParse *parse = GST_BASE_PARSE (object);
486 g_object_unref (parse->priv->adapter);
488 if (parse->priv->cache) {
489 gst_buffer_unref (parse->priv->cache);
490 parse->priv->cache = NULL;
493 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
495 g_list_free (parse->priv->pending_events);
496 parse->priv->pending_events = NULL;
497 parse->priv->pending_segment = FALSE;
499 if (parse->priv->index) {
500 gst_object_unref (parse->priv->index);
501 parse->priv->index = NULL;
503 g_mutex_clear (&parse->priv->index_lock);
505 gst_base_parse_clear_queues (parse);
507 G_OBJECT_CLASS (parent_class)->finalize (object);
511 gst_base_parse_class_init (GstBaseParseClass * klass)
513 GObjectClass *gobject_class;
514 GstElementClass *gstelement_class;
516 gobject_class = G_OBJECT_CLASS (klass);
517 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
518 parent_class = g_type_class_peek_parent (klass);
519 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
521 gstelement_class = (GstElementClass *) klass;
522 gstelement_class->change_state =
523 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
526 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
527 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
530 /* Default handlers */
531 klass->event = gst_base_parse_sink_eventfunc;
532 klass->src_event = gst_base_parse_src_eventfunc;
533 klass->convert = gst_base_parse_convert_default;
535 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
536 "baseparse element");
540 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
542 GstPadTemplate *pad_template;
544 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
546 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
549 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
550 g_return_if_fail (pad_template != NULL);
551 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
552 gst_pad_set_event_function (parse->sinkpad,
553 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
554 gst_pad_set_query_function (parse->sinkpad,
555 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
556 gst_pad_set_chain_function (parse->sinkpad,
557 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
558 gst_pad_set_activate_function (parse->sinkpad,
559 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
560 gst_pad_set_activatemode_function (parse->sinkpad,
561 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
562 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
563 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
565 GST_DEBUG_OBJECT (parse, "sinkpad created");
568 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
569 g_return_if_fail (pad_template != NULL);
570 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
571 gst_pad_set_event_function (parse->srcpad,
572 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
573 gst_pad_set_query_function (parse->srcpad,
574 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
575 gst_pad_use_fixed_caps (parse->srcpad);
576 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
577 GST_DEBUG_OBJECT (parse, "src created");
579 g_queue_init (&parse->priv->queued_frames);
581 parse->priv->adapter = gst_adapter_new ();
583 parse->priv->pad_mode = GST_PAD_MODE_NONE;
585 g_mutex_init (&parse->priv->index_lock);
588 gst_base_parse_reset (parse);
589 GST_DEBUG_OBJECT (parse, "init ok");
591 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
594 static GstBaseParseFrame *
595 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
597 GstBaseParseFrame *copy;
599 copy = g_slice_dup (GstBaseParseFrame, frame);
600 copy->buffer = gst_buffer_ref (frame->buffer);
601 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
603 GST_TRACE ("copied frame %p -> %p", frame, copy);
609 gst_base_parse_frame_free (GstBaseParseFrame * frame)
611 GST_TRACE ("freeing frame %p", frame);
614 gst_buffer_unref (frame->buffer);
615 frame->buffer = NULL;
618 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
619 g_slice_free (GstBaseParseFrame, frame);
621 memset (frame, 0, sizeof (*frame));
625 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
626 (GBoxedCopyFunc) gst_base_parse_frame_copy,
627 (GBoxedFreeFunc) gst_base_parse_frame_free);
630 * gst_base_parse_frame_init:
631 * @frame: #GstBaseParseFrame.
633 * Sets a #GstBaseParseFrame to initial state. Currently this means
634 * all public fields are zero-ed and a private flag is set to make
635 * sure gst_base_parse_frame_free() only frees the contents but not
636 * the actual frame. Use this function to initialise a #GstBaseParseFrame
637 * allocated on the stack.
642 gst_base_parse_frame_init (GstBaseParseFrame * frame)
644 memset (frame, 0, sizeof (GstBaseParseFrame));
645 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
646 GST_TRACE ("inited frame %p", frame);
650 * gst_base_parse_frame_new:
651 * @buffer: (transfer none): a #GstBuffer
653 * @overhead: number of bytes in this frame which should be counted as
654 * metadata overhead, ie. not used to calculate the average bitrate.
655 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
657 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
658 * elements written in C should usually allocate the frame on the stack and
659 * then use gst_base_parse_frame_init() to initialise it.
661 * Returns: a newly-allocated #GstBaseParseFrame. Free with
662 * gst_base_parse_frame_free() when no longer needed.
667 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
670 GstBaseParseFrame *frame;
672 frame = g_slice_new0 (GstBaseParseFrame);
673 frame->buffer = gst_buffer_ref (buffer);
675 GST_TRACE ("created frame %p", frame);
680 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
683 gst_buffer_replace (&frame->buffer, buf);
687 /* set flags one by one for clarity */
688 if (G_UNLIKELY (parse->priv->drain))
689 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
691 /* losing sync is pretty much a discont (and vice versa), no ? */
692 if (G_UNLIKELY (parse->priv->discont))
693 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
697 gst_base_parse_reset (GstBaseParse * parse)
699 GST_OBJECT_LOCK (parse);
700 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
701 parse->priv->duration = -1;
702 parse->priv->min_frame_size = 1;
703 parse->priv->discont = TRUE;
704 parse->priv->flushing = FALSE;
705 parse->priv->offset = 0;
706 parse->priv->sync_offset = 0;
707 parse->priv->update_interval = -1;
708 parse->priv->fps_num = parse->priv->fps_den = 0;
709 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
710 parse->priv->lead_in = parse->priv->lead_out = 0;
711 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
712 parse->priv->bitrate = 0;
713 parse->priv->framecount = 0;
714 parse->priv->bytecount = 0;
715 parse->priv->acc_duration = 0;
716 parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
717 parse->priv->first_frame_offset = -1;
718 parse->priv->estimated_duration = -1;
719 parse->priv->estimated_drift = 0;
720 parse->priv->next_ts = 0;
721 parse->priv->syncable = TRUE;
722 parse->priv->passthrough = FALSE;
723 parse->priv->has_timing_info = FALSE;
724 parse->priv->post_min_bitrate = TRUE;
725 parse->priv->post_avg_bitrate = TRUE;
726 parse->priv->post_max_bitrate = TRUE;
727 parse->priv->min_bitrate = G_MAXUINT;
728 parse->priv->max_bitrate = 0;
729 parse->priv->avg_bitrate = 0;
730 parse->priv->posted_avg_bitrate = 0;
732 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
733 parse->priv->index_last_offset = -1;
734 parse->priv->index_last_valid = TRUE;
735 parse->priv->upstream_seekable = FALSE;
736 parse->priv->upstream_size = 0;
737 parse->priv->upstream_has_duration = FALSE;
738 parse->priv->idx_interval = 0;
739 parse->priv->exact_position = TRUE;
740 parse->priv->seen_keyframe = FALSE;
742 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
743 parse->priv->last_offset = 0;
745 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
747 g_list_free (parse->priv->pending_events);
748 parse->priv->pending_events = NULL;
749 parse->priv->pending_segment = FALSE;
751 if (parse->priv->cache) {
752 gst_buffer_unref (parse->priv->cache);
753 parse->priv->cache = NULL;
756 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
757 g_slist_free (parse->priv->pending_seeks);
758 parse->priv->pending_seeks = NULL;
760 if (parse->priv->adapter)
761 gst_adapter_clear (parse->priv->adapter);
763 parse->priv->new_frame = TRUE;
765 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
766 g_list_free (parse->priv->detect_buffers);
767 parse->priv->detect_buffers = NULL;
768 parse->priv->detect_buffers_size = 0;
769 GST_OBJECT_UNLOCK (parse);
772 /* gst_base_parse_parse_frame:
773 * @parse: #GstBaseParse.
774 * @buffer: #GstBuffer.
776 * Default callback for parse_frame.
779 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
781 GstBuffer *buffer = frame->buffer;
783 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
784 GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
785 GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
787 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
788 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
789 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
794 /* gst_base_parse_convert:
795 * @parse: #GstBaseParse.
796 * @src_format: #GstFormat describing the source format.
797 * @src_value: Source value to be converted.
798 * @dest_format: #GstFormat defining the converted format.
799 * @dest_value: Pointer where the conversion result will be put.
801 * Converts using configured "convert" vmethod in #GstBaseParse class.
803 * Returns: TRUE if conversion was successful.
806 gst_base_parse_convert (GstBaseParse * parse,
807 GstFormat src_format,
808 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
810 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
813 g_return_val_if_fail (dest_value != NULL, FALSE);
818 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
820 #ifndef GST_DISABLE_GST_DEBUG
823 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
824 GST_LOG_OBJECT (parse,
825 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
826 GST_TIME_ARGS (src_value), *dest_value);
827 } else if (dest_format == GST_FORMAT_TIME &&
828 src_format == GST_FORMAT_BYTES) {
829 GST_LOG_OBJECT (parse,
830 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
831 src_value, GST_TIME_ARGS (*dest_value));
833 GST_LOG_OBJECT (parse,
834 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
835 GST_STR_NULL (gst_format_get_name (src_format)),
836 GST_STR_NULL (gst_format_get_name (dest_format)),
837 src_value, *dest_value);
840 GST_DEBUG_OBJECT (parse, "conversion failed");
848 /* gst_base_parse_sink_event:
849 * @pad: #GstPad that received the event.
850 * @event: #GstEvent to be handled.
852 * Handler for sink pad events.
854 * Returns: TRUE if the event was handled.
857 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
860 GstBaseParseClass *bclass;
863 parse = GST_BASE_PARSE (parent);
864 bclass = GST_BASE_PARSE_GET_CLASS (parse);
866 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
867 GST_EVENT_TYPE_NAME (event));
869 /* Cache all serialized events except EOS, SEGMENT and FLUSH_STOP if we have a
871 if (parse->priv->pending_segment && GST_EVENT_IS_SERIALIZED (event)
872 && GST_EVENT_TYPE (event) != GST_EVENT_EOS
873 && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT
874 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
875 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP
876 && GST_EVENT_TYPE (event) != GST_EVENT_CAPS) {
878 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
879 /* See if any bitrate tags were posted */
880 gst_base_parse_handle_tag (parse, event);
882 parse->priv->pending_events =
883 g_list_append (parse->priv->pending_events, event);
886 if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
887 parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
888 /* We've not posted bitrate tags yet - do so now */
889 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
892 ret = bclass->event (parse, event);
894 gst_event_unref (event);
899 GST_DEBUG_OBJECT (parse, "event handled");
905 /* gst_base_parse_sink_eventfunc:
906 * @parse: #GstBaseParse.
907 * @event: #GstEvent to be handled.
909 * Element-level event handler function.
911 * The event will be unreffed only if it has been handled and this
912 * function returns %TRUE
914 * Returns: %TRUE if the event was handled and not need forwarding.
917 gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
921 switch (GST_EVENT_TYPE (event)) {
925 GstBaseParseClass *klass;
927 klass = GST_BASE_PARSE_GET_CLASS (parse);
929 gst_event_parse_caps (event, &caps);
930 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
932 if (klass->set_sink_caps)
933 ret = klass->set_sink_caps (parse, caps);
937 /* will send our own caps downstream */
938 gst_event_unref (event);
941 case GST_EVENT_SEGMENT:
943 const GstSegment *in_segment;
944 GstSegment out_segment;
945 gint64 offset = 0, next_ts;
948 gdouble rate, applied_rate;
950 gint64 start, stop, pos, next_ts;
954 gst_event_parse_segment (event, &in_segment);
955 gst_segment_init (&out_segment, GST_FORMAT_TIME);
957 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
959 if (in_segment->format == GST_FORMAT_BYTES) {
960 GstBaseParseSeek *seek = NULL;
963 /* stop time is allowed to be open-ended, but not start & pos */
964 offset = in_segment->time;
966 GST_OBJECT_LOCK (parse);
967 for (node = parse->priv->pending_seeks; node; node = node->next) {
968 GstBaseParseSeek *tmp = node->data;
970 if (tmp->offset == offset) {
975 parse->priv->pending_seeks =
976 g_slist_remove (parse->priv->pending_seeks, seek);
977 GST_OBJECT_UNLOCK (parse);
980 GST_DEBUG_OBJECT (parse,
981 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
982 seek->accurate ? " accurate" : "", &seek->segment);
984 out_segment.start = seek->segment.start;
985 out_segment.stop = seek->segment.stop;
986 out_segment.time = seek->segment.start;
988 next_ts = seek->start_ts;
989 parse->priv->exact_position = seek->accurate;
992 /* best attempt convert */
993 /* as these are only estimates, stop is kept open-ended to avoid
994 * premature cutting */
995 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
996 GST_FORMAT_TIME, (gint64 *) & next_ts);
998 out_segment.start = next_ts;
999 out_segment.stop = GST_CLOCK_TIME_NONE;
1000 out_segment.time = next_ts;
1002 parse->priv->exact_position = (in_segment->start == 0);
1005 gst_event_unref (event);
1007 event = gst_event_new_segment (&out_segment);
1009 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1010 GST_SEGMENT_FORMAT, in_segment);
1012 } else if (in_segment->format != GST_FORMAT_TIME) {
1013 /* Unknown incoming segment format. Output a default open-ended
1015 gst_event_unref (event);
1017 out_segment.start = 0;
1018 out_segment.stop = GST_CLOCK_TIME_NONE;
1019 out_segment.time = 0;
1021 event = gst_event_new_segment (&out_segment);
1025 /* not considered BYTE seekable if it is talking to us in TIME,
1026 * whatever else it might claim */
1027 parse->priv->upstream_seekable = FALSE;
1028 next_ts = in_segment->start;
1031 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1034 gst_segment_set_newsegment (&parse->segment, update, rate,
1035 applied_rate, format, start, stop, start);
1038 /* save the segment for later, right before we push a new buffer so that
1039 * the caps are fixed and the next linked element can receive
1041 parse->priv->pending_events =
1042 g_list_append (parse->priv->pending_events, event);
1043 parse->priv->pending_segment = TRUE;
1046 /* but finish the current segment */
1047 GST_DEBUG_OBJECT (parse, "draining current segment");
1048 if (in_segment->rate > 0.0)
1049 gst_base_parse_drain (parse);
1051 gst_base_parse_finish_fragment (parse, FALSE);
1052 gst_adapter_clear (parse->priv->adapter);
1054 parse->priv->offset = offset;
1055 parse->priv->sync_offset = offset;
1056 parse->priv->next_ts = next_ts;
1057 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1058 parse->priv->discont = TRUE;
1059 parse->priv->seen_keyframe = FALSE;
1063 case GST_EVENT_FLUSH_START:
1064 parse->priv->flushing = TRUE;
1065 ret = gst_pad_push_event (parse->srcpad, event);
1066 /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
1067 GST_PAD_STREAM_LOCK (parse->srcpad);
1068 GST_PAD_STREAM_UNLOCK (parse->srcpad);
1071 case GST_EVENT_FLUSH_STOP:
1072 ret = gst_pad_push_event (parse->srcpad, event);
1073 gst_adapter_clear (parse->priv->adapter);
1074 gst_base_parse_clear_queues (parse);
1075 parse->priv->flushing = FALSE;
1076 parse->priv->discont = TRUE;
1077 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
1078 parse->priv->new_frame = TRUE;
1082 if (parse->segment.rate > 0.0)
1083 gst_base_parse_drain (parse);
1085 gst_base_parse_finish_fragment (parse, TRUE);
1087 /* If we STILL have zero frames processed, fire an error */
1088 if (parse->priv->framecount == 0) {
1089 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1090 ("No valid frames found before end of stream"), (NULL));
1092 /* newsegment and other serialized events before eos */
1093 if (G_UNLIKELY (parse->priv->pending_events)) {
1096 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1097 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1099 g_list_free (parse->priv->pending_events);
1100 parse->priv->pending_events = NULL;
1101 parse->priv->pending_segment = FALSE;
1103 ret = gst_pad_push_event (parse->srcpad, event);
1108 gst_pad_event_default (parse->sinkpad, GST_OBJECT_CAST (parse),
1116 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1118 GstBaseParse *parse;
1119 GstBaseParseClass *bclass;
1122 parse = GST_BASE_PARSE (parent);
1123 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1125 switch (GST_QUERY_TYPE (query)) {
1126 case GST_QUERY_CAPS:
1128 if (bclass->get_sink_caps) {
1129 GstCaps *caps, *filter;
1131 gst_query_parse_caps (query, &filter);
1132 caps = bclass->get_sink_caps (parse, filter);
1133 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1135 gst_query_set_caps_result (query, caps);
1136 gst_caps_unref (caps);
1140 GstCaps *caps, *template_caps, *filter;
1142 gst_query_parse_caps (query, &filter);
1143 template_caps = gst_pad_get_pad_template_caps (pad);
1144 if (filter != NULL) {
1146 gst_caps_intersect_full (filter, template_caps,
1147 GST_CAPS_INTERSECT_FIRST);
1148 gst_caps_unref (template_caps);
1150 caps = template_caps;
1152 gst_query_set_caps_result (query, caps);
1153 gst_caps_unref (caps);
1161 res = gst_pad_query_default (pad, parent, query);
1170 /* gst_base_parse_src_event:
1171 * @pad: #GstPad that received the event.
1172 * @event: #GstEvent that was received.
1174 * Handler for source pad events.
1176 * Returns: TRUE if the event was handled.
1179 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1181 GstBaseParse *parse;
1182 GstBaseParseClass *bclass;
1183 gboolean ret = TRUE;
1185 parse = GST_BASE_PARSE (parent);
1186 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1188 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1189 GST_EVENT_TYPE_NAME (event));
1191 if (bclass->src_event)
1192 ret = bclass->src_event (parse, event);
1194 gst_event_unref (event);
1200 gst_base_parse_is_seekable (GstBaseParse * parse)
1202 /* FIXME: could do more here, e.g. check index or just send data from 0
1203 * in pull mode and let decoder/sink clip */
1204 return parse->priv->syncable;
1207 /* gst_base_parse_src_eventfunc:
1208 * @parse: #GstBaseParse.
1209 * @event: #GstEvent that was received.
1211 * Default srcpad event handler.
1213 * Returns: TRUE if the event was handled and can be dropped.
1216 gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
1218 gboolean res = FALSE;
1220 switch (GST_EVENT_TYPE (event)) {
1221 case GST_EVENT_SEEK:
1222 if (gst_base_parse_is_seekable (parse))
1223 res = gst_base_parse_handle_seek (parse, event);
1226 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1235 * gst_base_parse_convert_default:
1236 * @parse: #GstBaseParse.
1237 * @src_format: #GstFormat describing the source format.
1238 * @src_value: Source value to be converted.
1239 * @dest_format: #GstFormat defining the converted format.
1240 * @dest_value: Pointer where the conversion result will be put.
1242 * Default implementation of "convert" vmethod in #GstBaseParse class.
1244 * Returns: TRUE if conversion was successful.
1249 gst_base_parse_convert_default (GstBaseParse * parse,
1250 GstFormat src_format,
1251 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1253 gboolean ret = FALSE;
1254 guint64 bytes, duration;
1256 if (G_UNLIKELY (src_format == dest_format)) {
1257 *dest_value = src_value;
1261 if (G_UNLIKELY (src_value == -1)) {
1266 if (G_UNLIKELY (src_value == 0)) {
1271 /* need at least some frames */
1272 if (!parse->priv->framecount)
1275 duration = parse->priv->acc_duration / GST_MSECOND;
1276 bytes = parse->priv->bytecount;
1278 if (G_UNLIKELY (!duration || !bytes))
1279 goto no_duration_bytes;
1281 if (src_format == GST_FORMAT_BYTES) {
1282 if (dest_format == GST_FORMAT_TIME) {
1283 /* BYTES -> TIME conversion */
1284 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1285 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1286 *dest_value *= GST_MSECOND;
1287 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1288 *dest_value / GST_MSECOND);
1291 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
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 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1305 } else if (src_format == GST_FORMAT_DEFAULT) {
1306 /* DEFAULT == frame-based */
1307 if (dest_format == GST_FORMAT_TIME) {
1308 GST_DEBUG_OBJECT (parse, "converting default -> time");
1309 if (parse->priv->fps_den) {
1310 *dest_value = gst_util_uint64_scale (src_value,
1311 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1315 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1318 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1325 GST_DEBUG_OBJECT (parse, "no framecount");
1330 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1331 G_GUINT64_FORMAT, duration, bytes);
1338 gst_base_parse_update_duration (GstBaseParse * baseparse)
1341 GstBaseParse *parse;
1343 parse = GST_BASE_PARSE (baseparse);
1345 peer = gst_pad_get_peer (parse->sinkpad);
1347 gboolean qres = FALSE;
1348 gint64 ptot, dest_value;
1350 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1351 gst_object_unref (GST_OBJECT (peer));
1353 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1354 GST_FORMAT_TIME, &dest_value)) {
1356 /* inform if duration changed, but try to avoid spamming */
1357 parse->priv->estimated_drift +=
1358 dest_value - parse->priv->estimated_duration;
1359 if (parse->priv->estimated_drift > GST_SECOND ||
1360 parse->priv->estimated_drift < -GST_SECOND) {
1361 gst_element_post_message (GST_ELEMENT (parse),
1362 gst_message_new_duration (GST_OBJECT (parse),
1363 GST_FORMAT_TIME, dest_value));
1364 parse->priv->estimated_drift = 0;
1366 parse->priv->estimated_duration = dest_value;
1367 GST_LOG_OBJECT (parse,
1368 "updated estimated duration to %" GST_TIME_FORMAT,
1369 GST_TIME_ARGS (dest_value));
1376 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1377 gboolean post_avg, gboolean post_max)
1379 GstTagList *taglist = NULL;
1381 if (post_min && parse->priv->post_min_bitrate) {
1382 taglist = gst_tag_list_new_empty ();
1384 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1385 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1388 if (post_avg && parse->priv->post_avg_bitrate) {
1389 if (taglist == NULL)
1390 taglist = gst_tag_list_new_empty ();
1392 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1393 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1394 parse->priv->avg_bitrate, NULL);
1397 if (post_max && parse->priv->post_max_bitrate) {
1398 if (taglist == NULL)
1399 taglist = gst_tag_list_new_empty ();
1401 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1402 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1405 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1406 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1407 parse->priv->max_bitrate);
1409 if (taglist != NULL) {
1410 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1414 /* gst_base_parse_update_bitrates:
1415 * @parse: #GstBaseParse.
1416 * @buffer: Current frame as a #GstBuffer
1418 * Keeps track of the minimum and maximum bitrates, and also maintains a
1419 * running average bitrate of the stream so far.
1422 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1424 /* Only update the tag on a 10 kbps delta */
1425 static const gint update_threshold = 10000;
1427 guint64 data_len, frame_dur;
1428 gint overhead, frame_bitrate, old_avg_bitrate;
1429 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1430 GstBuffer *buffer = frame->buffer;
1432 overhead = frame->overhead;
1436 data_len = gst_buffer_get_size (buffer) - overhead;
1437 parse->priv->data_bytecount += data_len;
1439 /* duration should be valid by now,
1440 * either set by subclass or maybe based on fps settings */
1441 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1442 /* Calculate duration of a frame from buffer properties */
1443 frame_dur = GST_BUFFER_DURATION (buffer);
1444 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1445 parse->priv->acc_duration;
1448 /* No way to figure out frame duration (is this even possible?) */
1452 /* override if subclass provided bitrate, e.g. metadata based */
1453 if (parse->priv->bitrate) {
1454 parse->priv->avg_bitrate = parse->priv->bitrate;
1455 /* spread this (confirmed) info ASAP */
1456 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1457 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1461 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1465 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1466 parse->priv->avg_bitrate);
1468 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1470 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1471 /* always post all at threshold time */
1472 update_min = update_max = update_avg = TRUE;
1475 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1476 if (frame_bitrate < parse->priv->min_bitrate) {
1477 parse->priv->min_bitrate = frame_bitrate;
1481 if (frame_bitrate > parse->priv->max_bitrate) {
1482 parse->priv->max_bitrate = frame_bitrate;
1486 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1487 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1488 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1493 if ((update_min || update_avg || update_max))
1494 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1501 * gst_base_parse_add_index_entry:
1502 * @parse: #GstBaseParse.
1503 * @offset: offset of entry
1504 * @ts: timestamp associated with offset
1505 * @key: whether entry refers to keyframe
1506 * @force: add entry disregarding sanity checks
1508 * Adds an entry to the index associating @offset to @ts. It is recommended
1509 * to only add keyframe entries. @force allows to bypass checks, such as
1510 * whether the stream is (upstream) seekable, another entry is already "close"
1511 * to the new entry, etc.
1513 * Returns: #gboolean indicating whether entry was added
1518 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1519 GstClockTime ts, gboolean key, gboolean force)
1521 gboolean ret = FALSE;
1522 GstIndexAssociation associations[2];
1524 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1525 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1527 if (G_LIKELY (!force)) {
1529 if (!parse->priv->upstream_seekable) {
1530 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1534 /* FIXME need better helper data structure that handles these issues
1535 * related to ongoing collecting of index entries */
1536 if (parse->priv->index_last_offset >= (gint64) offset) {
1537 GST_DEBUG_OBJECT (parse, "already have entries up to offset "
1538 "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
1542 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1543 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1544 parse->priv->idx_interval) {
1545 GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1546 GST_TIME_ARGS (parse->priv->index_last_ts));
1550 /* if last is not really the last one */
1551 if (!parse->priv->index_last_valid) {
1552 GstClockTime prev_ts;
1554 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1555 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1556 GST_DEBUG_OBJECT (parse,
1557 "entry too close to existing entry %" GST_TIME_FORMAT,
1558 GST_TIME_ARGS (prev_ts));
1559 parse->priv->index_last_offset = offset;
1560 parse->priv->index_last_ts = ts;
1566 associations[0].format = GST_FORMAT_TIME;
1567 associations[0].value = ts;
1568 associations[1].format = GST_FORMAT_BYTES;
1569 associations[1].value = offset;
1571 /* index might change on-the-fly, although that would be nutty app ... */
1572 GST_BASE_PARSE_INDEX_LOCK (parse);
1573 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1574 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1575 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1576 (const GstIndexAssociation *) &associations);
1577 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1580 parse->priv->index_last_offset = offset;
1581 parse->priv->index_last_ts = ts;
1590 /* check for seekable upstream, above and beyond a mere query */
1592 gst_base_parse_check_seekability (GstBaseParse * parse)
1595 gboolean seekable = FALSE;
1596 gint64 start = -1, stop = -1;
1597 guint idx_interval = 0;
1599 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1600 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1601 GST_DEBUG_OBJECT (parse, "seeking query failed");
1605 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1607 /* try harder to query upstream size if we didn't get it the first time */
1608 if (seekable && stop == -1) {
1609 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1610 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1613 /* if upstream doesn't know the size, it's likely that it's not seekable in
1614 * practice even if it technically may be seekable */
1615 if (seekable && (start != 0 || stop <= start)) {
1616 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1620 /* let's not put every single frame into our index */
1622 if (stop < 10 * 1024 * 1024)
1624 else if (stop < 100 * 1024 * 1024)
1627 idx_interval = 1000;
1631 gst_query_unref (query);
1633 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1634 G_GUINT64_FORMAT ")", seekable, start, stop);
1635 parse->priv->upstream_seekable = seekable;
1636 parse->priv->upstream_size = seekable ? stop : 0;
1638 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1639 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1642 /* some misc checks on upstream */
1644 gst_base_parse_check_upstream (GstBaseParse * parse)
1648 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1649 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1650 /* upstream has one, accept it also, and no further updates */
1651 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1652 parse->priv->upstream_has_duration = TRUE;
1655 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1656 parse->priv->upstream_has_duration);
1659 /* checks src caps to determine if dealing with audio or video */
1660 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1662 gst_base_parse_check_media (GstBaseParse * parse)
1667 caps = gst_pad_get_current_caps (parse->srcpad);
1668 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1669 parse->priv->is_video =
1670 g_str_has_prefix (gst_structure_get_name (s), "video");
1672 /* historical default */
1673 parse->priv->is_video = FALSE;
1676 gst_caps_unref (caps);
1678 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1681 /* takes ownership of frame */
1683 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1685 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1686 /* frame allocated on the heap, we can just take ownership */
1687 g_queue_push_tail (&parse->priv->queued_frames, frame);
1688 GST_TRACE ("queued frame %p", frame);
1690 GstBaseParseFrame *copy;
1692 /* probably allocated on the stack, must make a proper copy */
1693 copy = gst_base_parse_frame_copy (frame);
1694 g_queue_push_tail (&parse->priv->queued_frames, copy);
1695 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1696 gst_base_parse_frame_free (frame);
1700 /* makes sure that @buf is properly prepared and decorated for passing
1701 * to baseclass, and an equally setup frame is returned setup with @buf.
1702 * Takes ownership of @buf. */
1703 static GstBaseParseFrame *
1704 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1706 GstBaseParseFrame *frame = NULL;
1708 buffer = gst_buffer_make_writable (buffer);
1710 GST_LOG_OBJECT (parse,
1711 "preparing frame at offset %" G_GUINT64_FORMAT
1712 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1713 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1714 gst_buffer_get_size (buffer));
1716 if (parse->priv->discont) {
1717 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1718 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1719 parse->priv->discont = FALSE;
1722 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1724 frame = gst_base_parse_frame_new (buffer, 0, 0);
1726 /* also ensure to update state flags */
1727 gst_base_parse_frame_update (parse, frame, buffer);
1728 gst_buffer_unref (buffer);
1730 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1731 GST_LOG_OBJECT (parse, "marking as new frame");
1732 parse->priv->new_frame = FALSE;
1733 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1736 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1738 /* use default handler to provide initial (upstream) metadata */
1739 gst_base_parse_parse_frame (parse, frame);
1744 /* Wraps buffer in a frame and dispatches to subclass.
1745 * Also manages data skipping and offset handling (including adapter flushing).
1746 * Takes ownership of @buffer */
1747 static GstFlowReturn
1748 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1749 gint * skip, gint * flushed)
1751 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1752 GstBaseParseFrame *frame;
1755 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1757 GST_LOG_OBJECT (parse,
1758 "handling buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1759 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1760 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1761 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1763 /* track what is being flushed during this single round of frame processing */
1764 parse->priv->flushed = 0;
1767 /* make it easy for _finish_frame to pick up input data */
1768 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1769 gst_buffer_ref (buffer);
1770 gst_adapter_push (parse->priv->adapter, buffer);
1773 frame = gst_base_parse_prepare_frame (parse, buffer);
1774 ret = klass->handle_frame (parse, frame, skip);
1776 *flushed = parse->priv->flushed;
1778 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1781 if (ret != GST_FLOW_OK) {
1782 GST_DEBUG_OBJECT (parse, "handle_frame returned %d", ret);
1786 /* subclass can only do one of these, or semantics are too unclear */
1787 g_assert (*skip == 0 || *flushed == 0);
1789 /* track skipping */
1791 GstClockTime timestamp;
1794 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1795 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1796 /* reverse playback, and no frames found yet, so we are skipping
1797 * the leading part of a fragment, which may form the tail of
1798 * fragment coming later, hopefully subclass skips efficiently ... */
1799 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
1800 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1801 outbuf = gst_buffer_make_writable (outbuf);
1802 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
1803 parse->priv->buffers_head =
1804 g_slist_prepend (parse->priv->buffers_head, outbuf);
1807 gst_adapter_flush (parse->priv->adapter, *skip);
1809 if (!parse->priv->discont)
1810 parse->priv->sync_offset = parse->priv->offset;
1811 parse->priv->offset += *skip;
1812 parse->priv->discont = TRUE;
1813 /* check for indefinite skipping */
1814 if (ret == GST_FLOW_OK)
1815 ret = gst_base_parse_check_sync (parse);
1818 parse->priv->offset += *flushed;
1821 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1822 gst_adapter_clear (parse->priv->adapter);
1825 gst_base_parse_frame_free (frame);
1830 /* gst_base_parse_handle_and_push_buffer:
1831 * @parse: #GstBaseParse.
1832 * @klass: #GstBaseParseClass.
1833 * @frame: (transfer full): a #GstBaseParseFrame
1835 * Parses the frame from given buffer and pushes it forward. Also performs
1836 * timestamp handling and checks the segment limits.
1838 * This is called with srcpad STREAM_LOCK held.
1840 * Returns: #GstFlowReturn
1842 static GstFlowReturn
1843 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1844 GstBaseParseFrame * frame)
1849 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1851 /* some one-time start-up */
1852 if (G_UNLIKELY (!parse->priv->framecount)) {
1853 gst_base_parse_check_seekability (parse);
1854 gst_base_parse_check_upstream (parse);
1857 buffer = frame->buffer;
1858 offset = frame->offset;
1860 /* check if subclass/format can provide ts.
1861 * If so, that allows and enables extra seek and duration determining options */
1862 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1863 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) && parse->priv->has_timing_info
1864 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1865 parse->priv->first_frame_offset = offset;
1866 parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
1867 GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
1868 " for first frame at offset %" G_GINT64_FORMAT,
1869 GST_TIME_ARGS (parse->priv->first_frame_ts),
1870 parse->priv->first_frame_offset);
1871 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1873 GstClockTime last_ts = G_MAXINT64;
1875 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1876 gst_base_parse_locate_time (parse, &last_ts, &off);
1877 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1878 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1881 /* disable further checks */
1882 parse->priv->first_frame_offset = 0;
1886 /* again use default handler to add missing metadata;
1887 * we may have new information on frame properties */
1888 gst_base_parse_parse_frame (parse, frame);
1889 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
1890 GST_BUFFER_DURATION_IS_VALID (buffer)) {
1891 parse->priv->next_ts =
1892 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
1894 /* we lost track, do not produce bogus time next time around
1895 * (probably means parser subclass has given up on parsing as well) */
1896 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1897 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
1900 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1901 GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1902 gst_base_parse_add_index_entry (parse, offset,
1903 GST_BUFFER_TIMESTAMP (buffer),
1904 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1906 /* All OK, push queued frames if there are any */
1907 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1908 GstBaseParseFrame *queued_frame;
1910 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1911 gst_base_parse_push_frame (parse, queued_frame);
1915 return gst_base_parse_push_frame (parse, frame);
1919 * gst_base_parse_push_frame:
1920 * @parse: #GstBaseParse.
1921 * @frame: (transfer none): a #GstBaseParseFrame
1923 * Pushes the frame's buffer downstream, sends any pending events and
1924 * does some timestamp and segment handling. Takes ownership of
1925 * frame's buffer, though caller retains ownership of @frame.
1927 * This must be called with sinkpad STREAM_LOCK held.
1929 * Returns: #GstFlowReturn
1934 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1936 GstFlowReturn ret = GST_FLOW_OK;
1937 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1938 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1939 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1943 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1944 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1946 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1948 buffer = frame->buffer;
1950 GST_LOG_OBJECT (parse,
1951 "processing buffer of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT
1952 ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buffer),
1953 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1954 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1957 parse->priv->bytecount += frame->size;
1958 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
1959 parse->priv->framecount++;
1960 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
1961 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
1964 /* 0 means disabled */
1965 if (parse->priv->update_interval < 0)
1966 parse->priv->update_interval = 50;
1967 else if (parse->priv->update_interval > 0 &&
1968 (parse->priv->framecount % parse->priv->update_interval) == 0)
1969 gst_base_parse_update_duration (parse);
1971 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
1972 last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
1973 if (last_start != GST_CLOCK_TIME_NONE
1974 && GST_BUFFER_DURATION_IS_VALID (buffer))
1975 last_stop = last_start + GST_BUFFER_DURATION (buffer);
1977 /* should have caps by now */
1978 if (!gst_pad_has_current_caps (parse->srcpad))
1981 if (G_UNLIKELY (parse->priv->pending_segment)) {
1982 /* have caps; check identity */
1983 gst_base_parse_check_media (parse);
1986 /* Push pending events, including NEWSEGMENT events */
1987 if (G_UNLIKELY (parse->priv->pending_events)) {
1990 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1991 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1993 g_list_free (parse->priv->pending_events);
1994 parse->priv->pending_events = NULL;
1995 parse->priv->pending_segment = FALSE;
1998 /* segment adjustment magic; only if we are running the whole show */
1999 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2000 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2001 parse->priv->upstream_seekable)) {
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 /* skip gap FIXME */
2024 gst_pad_push_event (parse->srcpad,
2025 gst_event_new_segment (&parse->segment));
2027 parse->segment.position = last_start;
2032 /* update bitrates and optionally post corresponding tags
2033 * (following newsegment) */
2034 gst_base_parse_update_bitrates (parse, frame);
2036 if (klass->pre_push_frame) {
2037 ret = klass->pre_push_frame (parse, frame);
2039 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2042 /* take final ownership of frame buffer */
2043 if (frame->out_buffer) {
2044 buffer = frame->out_buffer;
2045 frame->out_buffer = NULL;
2046 gst_buffer_replace (&frame->buffer, NULL);
2048 buffer = frame->buffer;
2049 frame->buffer = NULL;
2052 /* subclass must play nice */
2053 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2055 size = gst_buffer_get_size (buffer);
2057 parse->priv->seen_keyframe |= parse->priv->is_video &&
2058 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2060 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2061 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2062 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2063 GST_BUFFER_TIMESTAMP (buffer) >
2064 parse->segment.stop + parse->priv->lead_out_ts) {
2065 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2067 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2068 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2069 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2070 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2071 parse->priv->lead_in_ts < parse->segment.start) {
2072 if (parse->priv->seen_keyframe) {
2073 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2076 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2077 ret = GST_BASE_PARSE_FLOW_DROPPED;
2084 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2085 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2086 gst_buffer_unref (buffer);
2088 } else if (ret == GST_FLOW_OK) {
2089 if (parse->segment.rate > 0.0) {
2090 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2092 ret = gst_pad_push (parse->srcpad, buffer);
2093 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2095 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2097 parse->priv->buffers_queued =
2098 g_slist_prepend (parse->priv->buffers_queued, buffer);
2102 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2103 size, gst_flow_get_name (ret));
2104 gst_buffer_unref (buffer);
2105 /* if we are not sufficiently in control, let upstream decide on EOS */
2106 if (ret == GST_FLOW_EOS &&
2107 (parse->priv->passthrough ||
2108 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2109 !parse->priv->upstream_seekable)))
2113 /* Update current running segment position */
2114 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2115 parse->segment.position < last_stop)
2116 parse->segment.position = last_stop;
2123 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2124 return GST_FLOW_ERROR;
2129 * gst_base_parse_finish_frame:
2130 * @parse: a #GstBaseParse
2131 * @frame: a #GstBaseParseFrame
2132 * @size: consumed input data represented by frame
2134 * Collects parsed data and pushes this downstream.
2135 * Source pad caps must be set when this is called.
2137 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2138 * Otherwise, @size samples will be taken from the input and used for output,
2139 * and the output's metadata (timestamps etc) will be taken as (optionally)
2140 * set by the subclass on @frame's (input) buffer (which is otherwise
2141 * ignored for any but the above purpose/information).
2143 * Note that the latter buffer is invalidated by this call, whereas the
2144 * caller retains ownership of @frame.
2146 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2151 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2154 GstFlowReturn ret = GST_FLOW_OK;
2156 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2157 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2158 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2159 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2162 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2163 "flushing size %d", frame->offset, size);
2165 if (parse->priv->scanning && frame->buffer) {
2166 if (!parse->priv->scanned_frame) {
2167 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2172 parse->priv->flushed += size;
2174 /* either PUSH or PULL mode arranges for adapter data */
2175 /* ensure output buffer */
2176 if (!frame->out_buffer) {
2177 GstBuffer *src, *dest;
2179 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2180 dest = frame->out_buffer;
2181 src = frame->buffer;
2182 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2183 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2184 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2185 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2186 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2187 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2189 gst_adapter_flush (parse->priv->adapter, size);
2192 /* use as input for subsequent processing */
2193 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2194 gst_buffer_unref (frame->out_buffer);
2195 frame->out_buffer = NULL;
2197 /* mark input size consumed */
2200 /* subclass might queue frames/data internally if it needs more
2201 * frames to decide on the format, or might request us to queue here. */
2202 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2203 gst_buffer_replace (&frame->buffer, NULL);
2205 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2206 GstBaseParseFrame *copy;
2208 copy = gst_base_parse_frame_copy (frame);
2209 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2210 gst_base_parse_queue_frame (parse, copy);
2214 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2220 /* gst_base_parse_drain:
2222 * Drains the adapter until it is empty. It decreases the min_frame_size to
2223 * match the current adapter size and calls chain method until the adapter
2224 * is emptied or chain returns with error.
2227 gst_base_parse_drain (GstBaseParse * parse)
2231 GST_DEBUG_OBJECT (parse, "draining");
2232 parse->priv->drain = TRUE;
2235 avail = gst_adapter_available (parse->priv->adapter);
2239 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2240 NULL) != GST_FLOW_OK) {
2244 /* nothing changed, maybe due to truncated frame; break infinite loop */
2245 if (avail == gst_adapter_available (parse->priv->adapter)) {
2246 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2247 gst_adapter_clear (parse->priv->adapter);
2251 parse->priv->drain = FALSE;
2254 /* gst_base_parse_send_buffers
2256 * Sends buffers collected in send_buffers downstream, and ensures that list
2257 * is empty at the end (errors or not).
2259 static GstFlowReturn
2260 gst_base_parse_send_buffers (GstBaseParse * parse)
2262 GSList *send = NULL;
2264 GstFlowReturn ret = GST_FLOW_OK;
2266 send = parse->priv->buffers_send;
2270 buf = GST_BUFFER_CAST (send->data);
2271 GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
2272 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2273 ", offset %" G_GINT64_FORMAT, buf,
2274 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
2275 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2277 /* iterate output queue an push downstream */
2278 ret = gst_pad_push (parse->srcpad, buf);
2279 send = g_slist_delete_link (send, send);
2281 /* clear any leftover if error */
2282 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2284 buf = GST_BUFFER_CAST (send->data);
2285 gst_buffer_unref (buf);
2286 send = g_slist_delete_link (send, send);
2291 parse->priv->buffers_send = send;
2296 /* gst_base_parse_start_fragment:
2298 * Prepares for processing a reverse playback (forward) fragment
2299 * by (re)setting proper state variables.
2301 static GstFlowReturn
2302 gst_base_parse_start_fragment (GstBaseParse * parse)
2304 GST_LOG_OBJECT (parse, "starting fragment");
2306 /* invalidate so no fall-back timestamping is performed;
2307 * ok if taken from subclass or upstream */
2308 parse->priv->next_ts = GST_CLOCK_TIME_NONE;
2309 parse->priv->prev_ts = GST_CLOCK_TIME_NONE;
2310 /* prevent it hanging around stop all the time */
2311 parse->segment.position = GST_CLOCK_TIME_NONE;
2313 parse->priv->discont = TRUE;
2315 /* head of previous fragment is now pending tail of current fragment */
2316 parse->priv->buffers_pending = parse->priv->buffers_head;
2317 parse->priv->buffers_head = NULL;
2323 /* gst_base_parse_finish_fragment:
2325 * Processes a reverse playback (forward) fragment:
2326 * - append head of last fragment that was skipped to current fragment data
2327 * - drain the resulting current fragment data (i.e. repeated chain)
2328 * - add time/duration (if needed) to frames queued by chain
2329 * - push queued data
2331 static GstFlowReturn
2332 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2335 GstFlowReturn ret = GST_FLOW_OK;
2336 gboolean seen_key = FALSE, seen_delta = FALSE;
2338 GST_LOG_OBJECT (parse, "finishing fragment");
2341 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2342 while (parse->priv->buffers_pending) {
2343 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2345 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2346 gst_buffer_get_size (buf));
2347 gst_adapter_push (parse->priv->adapter, buf);
2349 GST_LOG_OBJECT (parse, "discarding head buffer");
2350 gst_buffer_unref (buf);
2352 parse->priv->buffers_pending =
2353 g_slist_delete_link (parse->priv->buffers_pending,
2354 parse->priv->buffers_pending);
2357 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2358 /* initial skipped data is added to buffers_pending */
2359 gst_base_parse_drain (parse);
2361 if (parse->priv->buffers_send) {
2362 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2363 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2366 /* add metadata (if needed to queued buffers */
2367 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2368 GST_TIME_ARGS (parse->priv->last_ts));
2369 while (parse->priv->buffers_queued) {
2370 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2372 /* no touching if upstream or parsing provided time */
2373 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
2374 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2375 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2376 } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
2377 GST_BUFFER_DURATION_IS_VALID (buf)) {
2378 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
2379 parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
2381 parse->priv->last_ts = 0;
2382 GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
2383 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2384 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
2386 /* no idea, very bad */
2387 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2390 parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
2392 /* reverse order for ascending sending */
2393 /* send downstream at keyframe not preceded by a keyframe
2394 * (e.g. that should identify start of collection of IDR nals) */
2395 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2397 ret = gst_base_parse_send_buffers (parse);
2398 /* if a problem, throw all to sending */
2399 if (ret != GST_FLOW_OK) {
2400 parse->priv->buffers_send =
2401 g_slist_reverse (parse->priv->buffers_queued);
2402 parse->priv->buffers_queued = NULL;
2412 parse->priv->buffers_send =
2413 g_slist_prepend (parse->priv->buffers_send, buf);
2414 parse->priv->buffers_queued =
2415 g_slist_delete_link (parse->priv->buffers_queued,
2416 parse->priv->buffers_queued);
2419 /* audio may have all marked as keyframe, so arrange to send here */
2421 ret = gst_base_parse_send_buffers (parse);
2423 /* any trailing unused no longer usable (ideally none) */
2424 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2425 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2426 gst_adapter_available (parse->priv->adapter));
2427 gst_adapter_clear (parse->priv->adapter);
2433 /* small helper that checks whether we have been trying to resync too long */
2434 static inline GstFlowReturn
2435 gst_base_parse_check_sync (GstBaseParse * parse)
2437 if (G_UNLIKELY (parse->priv->discont &&
2438 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2439 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2440 ("Failed to parse stream"), (NULL));
2441 return GST_FLOW_ERROR;
2447 static GstFlowReturn
2448 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2450 GstBaseParseClass *bclass;
2451 GstBaseParse *parse;
2452 GstFlowReturn ret = GST_FLOW_OK;
2453 GstBuffer *tmpbuf = NULL;
2458 GstClockTime timestamp;
2460 parse = GST_BASE_PARSE (parent);
2461 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2463 if (parse->priv->detecting) {
2464 GstBuffer *detect_buf;
2466 if (parse->priv->detect_buffers_size == 0) {
2467 detect_buf = gst_buffer_ref (buffer);
2472 detect_buf = gst_buffer_new ();
2474 for (l = parse->priv->detect_buffers; l; l = l->next) {
2475 gsize tmpsize = gst_buffer_get_size (l->data);
2477 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2478 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2482 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2483 offset, gst_buffer_get_size (buffer));
2486 ret = bclass->detect (parse, detect_buf);
2487 gst_buffer_unref (detect_buf);
2489 if (ret == GST_FLOW_OK) {
2492 /* Detected something */
2493 parse->priv->detecting = FALSE;
2495 for (l = parse->priv->detect_buffers; l; l = l->next) {
2496 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2498 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2499 parent, GST_BUFFER_CAST (l->data));
2501 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2503 g_list_free (parse->priv->detect_buffers);
2504 parse->priv->detect_buffers = NULL;
2505 parse->priv->detect_buffers_size = 0;
2507 if (ret != GST_FLOW_OK) {
2511 /* Handle the current buffer */
2512 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2513 /* Still detecting, append buffer or error out if draining */
2515 if (parse->priv->drain) {
2516 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2517 return GST_FLOW_ERROR;
2518 } else if (parse->priv->flushing) {
2519 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2521 g_list_free (parse->priv->detect_buffers);
2522 parse->priv->detect_buffers = NULL;
2523 parse->priv->detect_buffers_size = 0;
2525 parse->priv->detect_buffers =
2526 g_list_append (parse->priv->detect_buffers, buffer);
2527 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2531 /* Something went wrong, subclass responsible for error reporting */
2535 /* And now handle the current buffer if detection worked */
2538 if (G_LIKELY (buffer)) {
2539 GST_LOG_OBJECT (parse,
2540 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT,
2541 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer));
2542 if (G_UNLIKELY (parse->priv->passthrough)) {
2543 GstBaseParseFrame frame;
2545 gst_base_parse_frame_init (&frame);
2546 frame.buffer = gst_buffer_make_writable (buffer);
2547 ret = gst_base_parse_push_frame (parse, &frame);
2548 gst_base_parse_frame_free (&frame);
2551 /* upstream feeding us in reverse playback;
2552 * finish previous fragment and start new upon DISCONT */
2553 if (parse->segment.rate < 0.0) {
2554 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2555 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2556 ret = gst_base_parse_finish_fragment (parse, TRUE);
2557 gst_base_parse_start_fragment (parse);
2560 gst_adapter_push (parse->priv->adapter, buffer);
2563 /* Parse and push as many frames as possible */
2564 /* Stop either when adapter is empty or we are flushing */
2565 while (!parse->priv->flushing) {
2568 /* note: if subclass indicates MAX fsize,
2569 * this will not likely be available anyway ... */
2570 min_size = MAX (parse->priv->min_frame_size, fsize);
2571 av = gst_adapter_available (parse->priv->adapter);
2573 if (G_UNLIKELY (parse->priv->drain)) {
2575 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2576 if (G_UNLIKELY (!min_size)) {
2581 /* Collect at least min_frame_size bytes */
2582 if (av < min_size) {
2583 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2587 /* move along with upstream timestamp (if any),
2588 * but interpolate in between */
2589 timestamp = gst_adapter_prev_timestamp (parse->priv->adapter, NULL);
2590 if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
2591 (parse->priv->prev_ts != timestamp)) {
2592 parse->priv->prev_ts = parse->priv->next_ts = timestamp;
2595 /* always pass all available data */
2596 data = gst_adapter_map (parse->priv->adapter, av);
2597 /* arrange for actual data to be copied if subclass tries to,
2598 * since what is passed is tied to the adapter */
2599 tmpbuf = gst_buffer_new ();
2600 gst_buffer_take_memory (tmpbuf, -1,
2601 gst_memory_new_wrapped (GST_MEMORY_FLAG_READONLY |
2602 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL));
2604 /* keep the adapter mapped, so keep track of what has to be flushed */
2605 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2608 /* probably already implicitly unmapped due to adapter operation,
2609 * but for good measure ... */
2610 gst_adapter_unmap (parse->priv->adapter);
2611 if (ret != GST_FLOW_OK) {
2614 if (skip == 0 && flush == 0) {
2615 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2616 "breaking to get more data");
2622 GST_LOG_OBJECT (parse, "chain leaving");
2626 /* pull @size bytes at current offset,
2627 * i.e. at least try to and possibly return a shorter buffer if near the end */
2628 static GstFlowReturn
2629 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2630 GstBuffer ** buffer)
2632 GstFlowReturn ret = GST_FLOW_OK;
2634 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2636 /* Caching here actually makes much less difference than one would expect.
2637 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2638 if (parse->priv->cache) {
2639 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2640 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2642 if (cache_offset <= parse->priv->offset &&
2643 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2644 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2645 parse->priv->offset - cache_offset, size);
2646 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2649 /* not enough data in the cache, free cache and get a new one */
2650 gst_buffer_unref (parse->priv->cache);
2651 parse->priv->cache = NULL;
2654 /* refill the cache */
2656 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2657 64 * 1024), &parse->priv->cache);
2658 if (ret != GST_FLOW_OK) {
2659 parse->priv->cache = NULL;
2663 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2665 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2667 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2671 /* Not possible to get enough data, try a last time with
2672 * requesting exactly the size we need */
2673 gst_buffer_unref (parse->priv->cache);
2674 parse->priv->cache = NULL;
2676 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2677 &parse->priv->cache);
2679 if (ret != GST_FLOW_OK) {
2680 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2685 if (gst_buffer_get_size (parse->priv->cache) < size) {
2686 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2687 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2688 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2690 *buffer = parse->priv->cache;
2691 parse->priv->cache = NULL;
2697 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2698 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2703 static GstFlowReturn
2704 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2707 GstClockTime ts = 0;
2711 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2712 ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
2713 parse->priv->last_offset);
2715 if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
2716 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2717 GST_TIME_ARGS (parse->segment.start));
2722 /* last fragment started at last_offset / last_ts;
2723 * seek back 10s capped at 1MB */
2724 if (parse->priv->last_ts >= 10 * GST_SECOND)
2725 ts = parse->priv->last_ts - 10 * GST_SECOND;
2726 /* if we are exact now, we will be more so going backwards */
2727 if (parse->priv->exact_position) {
2728 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2730 if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
2731 GST_FORMAT_BYTES, &offset)) {
2732 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2735 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2736 parse->priv->last_offset - 1024);
2737 offset = MAX (0, offset);
2739 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2741 parse->priv->offset = offset;
2743 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2745 if (ret != GST_FLOW_OK)
2748 /* offset will increase again as fragment is processed/parsed */
2749 parse->priv->last_offset = offset;
2751 gst_base_parse_start_fragment (parse);
2752 gst_adapter_push (parse->priv->adapter, buffer);
2753 ret = gst_base_parse_finish_fragment (parse, TRUE);
2754 if (ret != GST_FLOW_OK)
2757 /* force previous fragment */
2758 parse->priv->offset = -1;
2765 * pull and scan for next frame starting from current offset
2766 * ajusts sync, drain and offset going along */
2767 static GstFlowReturn
2768 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
2772 GstFlowReturn ret = GST_FLOW_OK;
2773 guint fsize, min_size;
2777 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2778 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2780 /* let's make this efficient for all subclass once and for all;
2781 * maybe it does not need this much, but in the latter case, we know we are
2782 * in pull mode here and might as well try to read and supply more anyway
2783 * (so does the buffer caching mechanism) */
2787 min_size = MAX (parse->priv->min_frame_size, fsize);
2789 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2791 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2792 if (ret != GST_FLOW_OK)
2795 /* if we got a short read, inform subclass we are draining leftover
2796 * and no more is to be expected */
2797 if (gst_buffer_get_size (buffer) < min_size) {
2798 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2799 parse->priv->drain = TRUE;
2802 if (parse->priv->detecting) {
2803 ret = klass->detect (parse, buffer);
2804 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2805 /* If draining we error out, otherwise request a buffer
2807 if (parse->priv->drain) {
2808 gst_buffer_unref (buffer);
2809 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2810 return GST_FLOW_ERROR;
2813 gst_buffer_unref (buffer);
2816 } else if (ret != GST_FLOW_OK) {
2817 gst_buffer_unref (buffer);
2818 GST_ERROR_OBJECT (parse, "detect() returned %s",
2819 gst_flow_get_name (ret));
2823 /* Else handle this buffer normally */
2826 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2827 if (ret != GST_FLOW_OK)
2830 /* something flushed means something happened,
2831 * and we should bail out of this loop so as not to occupy
2832 * the task thread indefinitely */
2834 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2837 /* nothing flushed, no skip and draining, so nothing left to do */
2838 if (!skip && parse->priv->drain) {
2839 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2840 "breaking loop and marking EOS");
2844 /* otherwise, get some more data
2845 * note that is checked this does not happen indefinitely */
2847 GST_LOG_OBJECT (parse, "getting some more data");
2850 parse->priv->drain = FALSE;
2857 /* Loop that is used in pull mode to retrieve data from upstream */
2859 gst_base_parse_loop (GstPad * pad)
2861 GstBaseParse *parse;
2862 GstBaseParseClass *klass;
2863 GstFlowReturn ret = GST_FLOW_OK;
2865 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2866 klass = GST_BASE_PARSE_GET_CLASS (parse);
2868 /* reverse playback:
2869 * first fragment (closest to stop time) is handled normally below,
2870 * then we pull in fragments going backwards */
2871 if (parse->segment.rate < 0.0) {
2872 /* check if we jumped back to a previous fragment,
2873 * which is a post-first fragment */
2874 if (parse->priv->offset < 0) {
2875 ret = gst_base_parse_handle_previous_fragment (parse);
2880 ret = gst_base_parse_scan_frame (parse, klass, TRUE);
2881 if (ret != GST_FLOW_OK)
2884 /* eat expected eos signalling past segment in reverse playback */
2885 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
2886 parse->segment.position >= parse->segment.stop) {
2887 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2888 /* push what was accumulated during loop run */
2889 gst_base_parse_finish_fragment (parse, FALSE);
2890 /* force previous fragment */
2891 parse->priv->offset = -1;
2896 if (ret == GST_FLOW_EOS)
2898 else if (ret != GST_FLOW_OK)
2901 gst_object_unref (parse);
2908 GST_DEBUG_OBJECT (parse, "eos");
2913 gboolean push_eos = FALSE;
2915 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
2916 gst_flow_get_name (ret));
2917 gst_pad_pause_task (parse->sinkpad);
2919 if (ret == GST_FLOW_EOS) {
2920 /* handle end-of-stream/segment */
2921 if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
2924 if ((stop = parse->segment.stop) == -1)
2925 stop = parse->segment.duration;
2927 GST_DEBUG_OBJECT (parse, "sending segment_done");
2929 gst_element_post_message
2930 (GST_ELEMENT_CAST (parse),
2931 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
2932 GST_FORMAT_TIME, stop));
2934 /* If we STILL have zero frames processed, fire an error */
2935 if (parse->priv->framecount == 0) {
2936 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
2937 ("No valid frames found before end of stream"), (NULL));
2941 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
2942 /* for fatal errors we post an error message, wrong-state is
2943 * not fatal because it happens due to flushes and only means
2944 * that we should stop now. */
2945 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
2946 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
2950 /* Push pending events, including NEWSEGMENT events */
2951 if (G_UNLIKELY (parse->priv->pending_events)) {
2954 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
2955 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2957 g_list_free (parse->priv->pending_events);
2958 parse->priv->pending_events = NULL;
2959 parse->priv->pending_segment = FALSE;
2962 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
2964 gst_object_unref (parse);
2969 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
2971 GstBaseParse *parse;
2975 parse = GST_BASE_PARSE (parent);
2977 GST_DEBUG_OBJECT (parse, "sink activate");
2979 query = gst_query_new_scheduling ();
2980 if (!gst_pad_peer_query (sinkpad, query)) {
2981 gst_query_unref (query);
2982 goto baseparse_push;
2985 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
2986 gst_query_unref (query);
2989 goto baseparse_push;
2991 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
2992 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
2993 goto baseparse_push;
2995 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3000 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3001 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3006 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3008 GstBaseParseClass *klass;
3009 gboolean result = TRUE;
3011 GST_DEBUG_OBJECT (parse, "activate %d", active);
3013 klass = GST_BASE_PARSE_GET_CLASS (parse);
3016 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3017 result = klass->start (parse);
3019 /* If the subclass implements ::detect we want to
3020 * call it for the first buffers now */
3021 parse->priv->detecting = (klass->detect != NULL);
3023 /* We must make sure streaming has finished before resetting things
3024 * and calling the ::stop vfunc */
3025 GST_PAD_STREAM_LOCK (parse->sinkpad);
3026 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3028 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3029 result = klass->stop (parse);
3031 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3033 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3038 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3039 GstPadMode mode, gboolean active)
3042 GstBaseParse *parse;
3044 parse = GST_BASE_PARSE (parent);
3046 GST_DEBUG_OBJECT (parse, "sink activate mode %d, %d", mode, active);
3048 if (!gst_base_parse_activate (parse, active))
3049 goto activate_failed;
3052 case GST_PAD_MODE_PULL:
3054 parse->priv->pending_events =
3055 g_list_append (parse->priv->pending_events,
3056 gst_event_new_segment (&parse->segment));
3057 parse->priv->pending_segment = TRUE;
3060 result = gst_pad_stop_task (pad);
3068 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3070 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3077 GST_DEBUG_OBJECT (parse, "activate failed");
3083 * gst_base_parse_set_duration:
3084 * @parse: #GstBaseParse.
3086 * @duration: duration value.
3087 * @interval: how often to update the duration estimate based on bitrate, or 0.
3089 * Sets the duration of the currently playing media. Subclass can use this
3090 * when it is able to determine duration and/or notices a change in the media
3091 * duration. Alternatively, if @interval is non-zero (default), then stream
3092 * duration is determined based on estimated bitrate, and updated every @interval
3098 gst_base_parse_set_duration (GstBaseParse * parse,
3099 GstFormat fmt, gint64 duration, gint interval)
3101 g_return_if_fail (parse != NULL);
3103 if (parse->priv->upstream_has_duration) {
3104 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3108 if (duration != parse->priv->duration) {
3111 m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
3112 gst_element_post_message (GST_ELEMENT (parse), m);
3114 /* TODO: what about duration tag? */
3116 parse->priv->duration = duration;
3117 parse->priv->duration_fmt = fmt;
3118 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3119 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3120 if (interval != 0) {
3121 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3125 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3126 parse->priv->update_interval = interval;
3132 * gst_base_parse_set_average_bitrate:
3133 * @parse: #GstBaseParse.
3134 * @bitrate: average bitrate in bits/second
3136 * Optionally sets the average bitrate detected in media (if non-zero),
3137 * e.g. based on metadata, as it will be posted to the application.
3139 * By default, announced average bitrate is estimated. The average bitrate
3140 * is used to estimate the total duration of the stream and to estimate
3141 * a seek position, if there's no index and the format is syncable
3142 * (see gst_base_parse_set_syncable()).
3147 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3149 parse->priv->bitrate = bitrate;
3150 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3154 * gst_base_parse_set_min_frame_size:
3155 * @parse: #GstBaseParse.
3156 * @min_size: Minimum size of the data that this base class should give to
3159 * Subclass can use this function to tell the base class that it needs to
3160 * give at least #min_size buffers.
3165 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3167 g_return_if_fail (parse != NULL);
3169 parse->priv->min_frame_size = min_size;
3170 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3174 * gst_base_parse_set_frame_rate:
3175 * @parse: the #GstBaseParse to set
3176 * @fps_num: frames per second (numerator).
3177 * @fps_den: frames per second (denominator).
3178 * @lead_in: frames needed before a segment for subsequent decode
3179 * @lead_out: frames needed after a segment
3181 * If frames per second is configured, parser can take care of buffer duration
3182 * and timestamping. When performing segment clipping, or seeking to a specific
3183 * location, a corresponding decoder might need an initial @lead_in and a
3184 * following @lead_out number of frames to ensure the desired segment is
3185 * entirely filled upon decoding.
3190 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3191 guint fps_den, guint lead_in, guint lead_out)
3193 g_return_if_fail (parse != NULL);
3195 parse->priv->fps_num = fps_num;
3196 parse->priv->fps_den = fps_den;
3197 if (!fps_num || !fps_den) {
3198 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3200 fps_num = fps_den = 0;
3201 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3202 parse->priv->lead_in = parse->priv->lead_out = 0;
3203 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3205 parse->priv->frame_duration =
3206 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3207 parse->priv->lead_in = lead_in;
3208 parse->priv->lead_out = lead_out;
3209 parse->priv->lead_in_ts =
3210 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3211 parse->priv->lead_out_ts =
3212 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3213 /* aim for about 1.5s to estimate duration */
3214 if (parse->priv->update_interval < 0) {
3215 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3216 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3217 parse->priv->update_interval);
3220 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3221 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3222 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3223 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3224 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3225 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3229 * gst_base_parse_set_has_timing_info:
3230 * @parse: a #GstBaseParse
3231 * @has_timing: whether frames carry timing information
3233 * Set if frames carry timing information which the subclass can (generally)
3234 * parse and provide. In particular, intrinsic (rather than estimated) time
3235 * can be obtained following a seek.
3240 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3242 parse->priv->has_timing_info = has_timing;
3243 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3247 * gst_base_parse_set_syncable:
3248 * @parse: a #GstBaseParse
3249 * @syncable: set if frame starts can be identified
3251 * Set if frame starts can be identified. This is set by default and
3252 * determines whether seeking based on bitrate averages
3253 * is possible for a format/stream.
3258 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3260 parse->priv->syncable = syncable;
3261 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3265 * gst_base_parse_set_passthrough:
3266 * @parse: a #GstBaseParse
3267 * @passthrough: %TRUE if parser should run in passthrough mode
3269 * Set if the nature of the format or configuration does not allow (much)
3270 * parsing, and the parser should operate in passthrough mode (which only
3271 * applies when operating in push mode). That is, incoming buffers are
3272 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3273 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3274 * so subclass can perform as much or as little is appropriate for
3275 * passthrough semantics in @pre_push_frame.
3280 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3282 parse->priv->passthrough = passthrough;
3283 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3287 * gst_base_parse_set_latency:
3288 * @parse: a #GstBaseParse
3289 * @min_latency: minimum parse latency
3290 * @max_latency: maximum parse latency
3292 * Sets the minimum and maximum (which may likely be equal) latency introduced
3293 * by the parsing process. If there is such a latency, which depends on the
3294 * particular parsing of the format, it typically corresponds to 1 frame duration.
3299 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3300 GstClockTime max_latency)
3302 GST_OBJECT_LOCK (parse);
3303 parse->priv->min_latency = min_latency;
3304 parse->priv->max_latency = max_latency;
3305 GST_OBJECT_UNLOCK (parse);
3306 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3307 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3308 GST_TIME_ARGS (max_latency));
3312 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3313 GstClockTime * duration)
3315 gboolean res = FALSE;
3317 g_return_val_if_fail (duration != NULL, FALSE);
3319 *duration = GST_CLOCK_TIME_NONE;
3320 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3321 GST_LOG_OBJECT (parse, "using provided duration");
3322 *duration = parse->priv->duration;
3324 } else if (parse->priv->duration != -1) {
3325 GST_LOG_OBJECT (parse, "converting provided duration");
3326 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3327 parse->priv->duration, format, (gint64 *) duration);
3328 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3329 GST_LOG_OBJECT (parse, "using estimated duration");
3330 *duration = parse->priv->estimated_duration;
3333 GST_LOG_OBJECT (parse, "cannot estimate duration");
3336 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3337 GST_TIME_ARGS (*duration));
3342 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
3344 GstBaseParse *parse;
3345 gboolean res = FALSE;
3347 parse = GST_BASE_PARSE (parent);
3349 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3351 switch (GST_QUERY_TYPE (query)) {
3352 case GST_QUERY_POSITION:
3357 GST_DEBUG_OBJECT (parse, "position query");
3358 gst_query_parse_position (query, &format, NULL);
3360 /* try upstream first */
3361 res = gst_pad_query_default (pad, parent, query);
3363 /* Fall back on interpreting segment */
3364 GST_OBJECT_LOCK (parse);
3365 if (format == GST_FORMAT_BYTES) {
3366 dest_value = parse->priv->offset;
3368 } else if (format == parse->segment.format &&
3369 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3370 dest_value = gst_segment_to_stream_time (&parse->segment,
3371 parse->segment.format, parse->segment.position);
3374 GST_OBJECT_UNLOCK (parse);
3376 /* no precise result, upstream no idea either, then best estimate */
3377 /* priv->offset is updated in both PUSH/PULL modes */
3378 res = gst_base_parse_convert (parse,
3379 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3382 gst_query_set_position (query, format, dest_value);
3386 case GST_QUERY_DURATION:
3389 GstClockTime duration;
3391 GST_DEBUG_OBJECT (parse, "duration query");
3392 gst_query_parse_duration (query, &format, NULL);
3394 /* consult upstream */
3395 res = gst_pad_query_default (pad, parent, query);
3397 /* otherwise best estimate from us */
3399 res = gst_base_parse_get_duration (parse, format, &duration);
3401 gst_query_set_duration (query, format, duration);
3405 case GST_QUERY_SEEKING:
3408 GstClockTime duration = GST_CLOCK_TIME_NONE;
3409 gboolean seekable = FALSE;
3411 GST_DEBUG_OBJECT (parse, "seeking query");
3412 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3414 /* consult upstream */
3415 res = gst_pad_query_default (pad, parent, query);
3417 /* we may be able to help if in TIME */
3418 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3419 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3420 /* already OK if upstream takes care */
3421 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3423 if (!(res && seekable)) {
3424 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3425 || duration == -1) {
3426 /* seekable if we still have a chance to get duration later on */
3428 parse->priv->upstream_seekable && parse->priv->update_interval;
3430 seekable = parse->priv->upstream_seekable;
3431 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3434 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3440 case GST_QUERY_FORMATS:
3441 gst_query_set_formatsv (query, 3, fmtlist);
3444 case GST_QUERY_CONVERT:
3446 GstFormat src_format, dest_format;
3447 gint64 src_value, dest_value;
3449 gst_query_parse_convert (query, &src_format, &src_value,
3450 &dest_format, &dest_value);
3452 res = gst_base_parse_convert (parse, src_format, src_value,
3453 dest_format, &dest_value);
3455 gst_query_set_convert (query, src_format, src_value,
3456 dest_format, dest_value);
3460 case GST_QUERY_LATENCY:
3462 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3464 GstClockTime min_latency, max_latency;
3466 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3467 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3468 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3469 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3471 GST_OBJECT_LOCK (parse);
3472 /* add our latency */
3473 if (min_latency != -1)
3474 min_latency += parse->priv->min_latency;
3475 if (max_latency != -1)
3476 max_latency += parse->priv->max_latency;
3477 GST_OBJECT_UNLOCK (parse);
3479 gst_query_set_latency (query, live, min_latency, max_latency);
3484 res = gst_pad_query_default (pad, parent, query);
3490 /* scans for a cluster start from @pos,
3491 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3492 static GstFlowReturn
3493 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3494 GstClockTime * time, GstClockTime * duration)
3496 GstBaseParseClass *klass;
3498 gboolean orig_drain, orig_discont;
3499 GstFlowReturn ret = GST_FLOW_OK;
3500 GstBuffer *buf = NULL;
3501 GstBaseParseFrame *sframe = NULL;
3503 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3504 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3505 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3507 klass = GST_BASE_PARSE_GET_CLASS (parse);
3509 *time = GST_CLOCK_TIME_NONE;
3510 *duration = GST_CLOCK_TIME_NONE;
3513 orig_offset = parse->priv->offset;
3514 orig_discont = parse->priv->discont;
3515 orig_drain = parse->priv->drain;
3517 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3518 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3520 /* jump elsewhere and locate next frame */
3521 parse->priv->offset = *pos;
3522 /* mark as scanning so frames don't get processed all the way */
3523 parse->priv->scanning = TRUE;
3524 ret = gst_base_parse_scan_frame (parse, klass, FALSE);
3525 parse->priv->scanning = FALSE;
3526 /* retrieve frame found during scan */
3527 sframe = parse->priv->scanned_frame;
3528 parse->priv->scanned_frame = NULL;
3530 if (ret != GST_FLOW_OK || !sframe)
3533 /* get offset first, subclass parsing might dump other stuff in there */
3534 *pos = sframe->offset;
3535 buf = sframe->buffer;
3538 /* but it should provide proper time */
3539 *time = GST_BUFFER_TIMESTAMP (buf);
3540 *duration = GST_BUFFER_DURATION (buf);
3542 GST_LOG_OBJECT (parse,
3543 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3544 GST_TIME_ARGS (*time), *pos);
3548 gst_base_parse_frame_free (sframe);
3551 parse->priv->offset = orig_offset;
3552 parse->priv->discont = orig_discont;
3553 parse->priv->drain = orig_drain;
3558 /* bisect and scan through file for frame starting before @time,
3559 * returns OK and @time/@offset if found, NONE and/or error otherwise
3560 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3561 static GstFlowReturn
3562 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3565 GstFlowReturn ret = GST_FLOW_OK;
3566 gint64 lpos, hpos, newpos;
3567 GstClockTime time, ltime, htime, newtime, dur;
3568 gboolean cont = TRUE;
3569 const GstClockTime tolerance = TARGET_DIFFERENCE;
3570 const guint chunk = 4 * 1024;
3572 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3573 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3575 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3576 GST_TIME_ARGS (*_time));
3578 /* TODO also make keyframe aware if useful some day */
3593 /* do not know at first */
3595 *_time = GST_CLOCK_TIME_NONE;
3597 /* need initial positions; start and end */
3598 lpos = parse->priv->first_frame_offset;
3599 ltime = parse->priv->first_frame_ts;
3600 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3601 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3602 return GST_FLOW_ERROR;
3604 hpos = parse->priv->upstream_size;
3606 GST_DEBUG_OBJECT (parse,
3607 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3608 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3609 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3611 /* check preconditions are satisfied;
3612 * start and end are needed, except for special case where we scan for
3613 * last frame to determine duration */
3614 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3615 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3616 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3620 /* shortcut cases */
3623 } else if (time < ltime + tolerance) {
3627 } else if (time >= htime) {
3633 while (htime > ltime && cont) {
3634 GST_LOG_OBJECT (parse,
3635 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3636 GST_TIME_ARGS (ltime));
3637 GST_LOG_OBJECT (parse,
3638 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3639 GST_TIME_ARGS (htime));
3640 if (G_UNLIKELY (time == G_MAXINT64)) {
3642 } else if (G_LIKELY (hpos > lpos)) {
3644 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3647 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3649 /* we check this case once, but not forever, so break loop */
3654 newpos = CLAMP (newpos, lpos, hpos);
3655 GST_LOG_OBJECT (parse,
3656 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3657 GST_TIME_ARGS (time), newpos);
3659 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3660 if (ret == GST_FLOW_EOS) {
3661 /* heuristic HACK */
3662 hpos = MAX (lpos, hpos - chunk);
3664 } else if (ret != GST_FLOW_OK) {
3668 if (newtime == -1 || newpos == -1) {
3669 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3673 if (G_UNLIKELY (time == G_MAXINT64)) {
3676 if (GST_CLOCK_TIME_IS_VALID (dur))
3679 } else if (newtime > time) {
3681 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3683 } else if (newtime + tolerance > time) {
3684 /* close enough undershoot */
3688 } else if (newtime < ltime) {
3689 /* so a position beyond lpos resulted in earlier time than ltime ... */
3690 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3693 /* undershoot too far */
3694 newpos += newpos == lpos ? chunk : 0;
3695 lpos = CLAMP (newpos, lpos, hpos);
3701 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3702 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3707 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3708 gboolean before, GstClockTime * _ts)
3710 gint64 bytes = 0, ts = 0;
3711 GstIndexEntry *entry = NULL;
3713 if (time == GST_CLOCK_TIME_NONE) {
3719 GST_BASE_PARSE_INDEX_LOCK (parse);
3720 if (parse->priv->index) {
3721 /* Let's check if we have an index entry for that time */
3722 entry = gst_index_get_assoc_entry (parse->priv->index,
3723 parse->priv->index_id,
3724 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3725 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3729 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3730 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3732 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3733 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3734 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3736 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3737 GST_TIME_ARGS (time));
3740 ts = GST_CLOCK_TIME_NONE;
3743 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3752 /* returns TRUE if seek succeeded */
3754 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3759 GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
3760 gboolean flush, update, res = TRUE, accurate;
3761 gint64 cur, stop, seekpos, seekstop;
3762 GstSegment seeksegment = { 0, };
3763 GstClockTime start_ts;
3765 gst_event_parse_seek (event, &rate, &format, &flags,
3766 &cur_type, &cur, &stop_type, &stop);
3768 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3769 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3770 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3771 cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
3773 /* no negative rates in push mode */
3774 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3777 if (cur_type != GST_SEEK_TYPE_SET ||
3778 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3781 /* For any format other than TIME, see if upstream handles
3782 * it directly or fail. For TIME, try upstream, but do it ourselves if
3783 * it fails upstream */
3784 res = gst_pad_push_event (parse->sinkpad, event);
3785 if (format != GST_FORMAT_TIME || res)
3788 /* get flush flag */
3789 flush = flags & GST_SEEK_FLAG_FLUSH;
3791 /* copy segment, we need this because we still need the old
3792 * segment when we close the current segment. */
3793 gst_segment_copy_into (&parse->segment, &seeksegment);
3795 GST_DEBUG_OBJECT (parse, "configuring seek");
3796 gst_segment_do_seek (&seeksegment, rate, format, flags,
3797 cur_type, cur, stop_type, stop, &update);
3799 /* accurate seeking implies seek tables are used to obtain position,
3800 * and the requested segment is maintained exactly, not adjusted any way */
3801 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3803 /* maybe we can be accurate for (almost) free */
3804 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3805 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3806 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3810 GstClockTime startpos = seeksegment.position;
3812 /* accurate requested, so ... seek a bit before target */
3813 if (startpos < parse->priv->lead_in_ts)
3816 startpos -= parse->priv->lead_in_ts;
3817 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3818 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3821 start_ts = seeksegment.position;
3822 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.position,
3823 GST_FORMAT_BYTES, &seekpos))
3824 goto convert_failed;
3825 if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
3826 GST_FORMAT_BYTES, &seekstop))
3827 goto convert_failed;
3830 GST_DEBUG_OBJECT (parse,
3831 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3833 GST_DEBUG_OBJECT (parse,
3834 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3835 seeksegment.stop, seekstop);
3837 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
3840 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3843 if (parse->srcpad) {
3844 GST_DEBUG_OBJECT (parse, "sending flush start");
3845 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3846 /* unlock upstream pull_range */
3847 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3850 gst_pad_pause_task (parse->sinkpad);
3853 /* we should now be able to grab the streaming thread because we stopped it
3854 * with the above flush/pause code */
3855 GST_PAD_STREAM_LOCK (parse->sinkpad);
3857 /* save current position */
3858 last_stop = parse->segment.position;
3859 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3862 /* now commit to new position */
3864 /* prepare for streaming again */
3866 GST_DEBUG_OBJECT (parse, "sending flush stop");
3867 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
3868 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
3869 gst_base_parse_clear_queues (parse);
3871 /* keep track of our position */
3872 seeksegment.base = gst_segment_to_running_time (&seeksegment,
3873 seeksegment.format, parse->segment.position);
3876 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
3878 /* store the newsegment event so it can be sent from the streaming thread. */
3879 /* This will be sent later in _loop() */
3880 parse->priv->pending_segment = TRUE;
3881 parse->priv->pending_events =
3882 g_list_append (parse->priv->pending_events,
3883 gst_event_new_segment (&parse->segment));
3885 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
3886 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
3887 ", pos = %" GST_TIME_FORMAT, format,
3888 GST_TIME_ARGS (parse->segment.start),
3889 GST_TIME_ARGS (parse->segment.stop),
3890 GST_TIME_ARGS (parse->segment.start));
3892 /* one last chance in pull mode to stay accurate;
3893 * maybe scan and subclass can find where to go */
3896 GstClockTime ts = seeksegment.position;
3898 gst_base_parse_locate_time (parse, &ts, &scanpos);
3902 /* running collected index now consists of several intervals,
3903 * so optimized check no longer possible */
3904 parse->priv->index_last_valid = FALSE;
3905 parse->priv->index_last_offset = 0;
3906 parse->priv->index_last_ts = 0;
3910 /* mark discont if we are going to stream from another position. */
3911 if (seekpos != parse->priv->offset) {
3912 GST_DEBUG_OBJECT (parse,
3913 "mark DISCONT, we did a seek to another position");
3914 parse->priv->offset = seekpos;
3915 parse->priv->last_offset = seekpos;
3916 parse->priv->seen_keyframe = FALSE;
3917 parse->priv->discont = TRUE;
3918 parse->priv->next_ts = start_ts;
3919 parse->priv->last_ts = GST_CLOCK_TIME_NONE;
3920 parse->priv->sync_offset = seekpos;
3921 parse->priv->exact_position = accurate;
3924 /* Start streaming thread if paused */
3925 gst_pad_start_task (parse->sinkpad,
3926 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
3928 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3933 GstEvent *new_event;
3934 GstBaseParseSeek *seek;
3935 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
3937 /* The only thing we need to do in PUSH-mode is to send the
3938 seek event (in bytes) to upstream. Segment / flush handling happens
3939 in corresponding src event handlers */
3940 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
3941 if (seekstop >= 0 && seekstop <= seekpos)
3943 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
3944 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
3946 /* store segment info so its precise details can be reconstructed when
3947 * receiving newsegment;
3948 * this matters for all details when accurate seeking,
3949 * is most useful to preserve NONE stop time otherwise */
3950 seek = g_new0 (GstBaseParseSeek, 1);
3951 seek->segment = seeksegment;
3952 seek->accurate = accurate;
3953 seek->offset = seekpos;
3954 seek->start_ts = start_ts;
3955 GST_OBJECT_LOCK (parse);
3956 /* less optimal, but preserves order */
3957 parse->priv->pending_seeks =
3958 g_slist_append (parse->priv->pending_seeks, seek);
3959 GST_OBJECT_UNLOCK (parse);
3961 res = gst_pad_push_event (parse->sinkpad, new_event);
3964 GST_OBJECT_LOCK (parse);
3965 parse->priv->pending_seeks =
3966 g_slist_remove (parse->priv->pending_seeks, seek);
3967 GST_OBJECT_UNLOCK (parse);
3978 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
3984 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
3990 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
3996 /* Checks if bitrates are available from upstream tags so that we don't
3997 * override them later
4000 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4002 GstTagList *taglist = NULL;
4005 gst_event_parse_tag (event, &taglist);
4007 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4008 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4009 parse->priv->post_min_bitrate = FALSE;
4011 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4012 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4013 parse->priv->post_avg_bitrate = FALSE;
4015 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4016 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4017 parse->priv->post_max_bitrate = FALSE;
4023 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4025 GstBaseParse *parse = GST_BASE_PARSE (element);
4027 GST_BASE_PARSE_INDEX_LOCK (parse);
4028 if (parse->priv->index)
4029 gst_object_unref (parse->priv->index);
4031 parse->priv->index = gst_object_ref (index);
4032 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4033 &parse->priv->index_id);
4034 parse->priv->own_index = FALSE;
4036 parse->priv->index = NULL;
4038 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4042 gst_base_parse_get_index (GstElement * element)
4044 GstBaseParse *parse = GST_BASE_PARSE (element);
4045 GstIndex *result = NULL;
4047 GST_BASE_PARSE_INDEX_LOCK (parse);
4048 if (parse->priv->index)
4049 result = gst_object_ref (parse->priv->index);
4050 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4056 static GstStateChangeReturn
4057 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4059 GstBaseParse *parse;
4060 GstStateChangeReturn result;
4062 parse = GST_BASE_PARSE (element);
4064 switch (transition) {
4065 case GST_STATE_CHANGE_READY_TO_PAUSED:
4066 /* If this is our own index destroy it as the
4067 * old entries might be wrong for the new stream */
4068 GST_BASE_PARSE_INDEX_LOCK (parse);
4069 if (parse->priv->own_index) {
4070 gst_object_unref (parse->priv->index);
4071 parse->priv->index = NULL;
4072 parse->priv->own_index = FALSE;
4075 /* If no index was created, generate one */
4076 if (G_UNLIKELY (!parse->priv->index)) {
4077 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4079 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4080 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4081 &parse->priv->index_id);
4082 parse->priv->own_index = TRUE;
4084 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4090 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4092 switch (transition) {
4093 case GST_STATE_CHANGE_PAUSED_TO_READY:
4094 gst_base_parse_reset (parse);