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., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, 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)
221 #define MAX_INDEX_ENTRIES 4096
223 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
224 #define GST_CAT_DEFAULT gst_base_parse_debug
226 /* Supported formats */
227 static const GstFormat fmtlist[] = {
234 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
235 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
237 struct _GstBaseParsePrivate
244 GstFormat duration_fmt;
245 gint64 estimated_duration;
246 gint64 estimated_drift;
248 guint min_frame_size;
249 gboolean passthrough;
250 gboolean pts_interpolate;
252 gboolean has_timing_info;
253 guint fps_num, fps_den;
254 gint update_interval;
256 guint lead_in, lead_out;
257 GstClockTime lead_in_ts, lead_out_ts;
258 GstClockTime min_latency, max_latency;
266 GstClockTime next_pts;
267 GstClockTime next_dts;
268 GstClockTime prev_pts;
269 GstClockTime prev_dts;
270 GstClockTime frame_duration;
271 gboolean seen_keyframe;
277 guint64 data_bytecount;
278 guint64 acc_duration;
279 GstClockTime first_frame_pts;
280 GstClockTime first_frame_dts;
281 gint64 first_frame_offset;
283 gboolean post_min_bitrate;
284 gboolean post_avg_bitrate;
285 gboolean post_max_bitrate;
289 guint posted_avg_bitrate;
291 /* frames/buffers that are queued and ready to go on OK */
292 GQueue queued_frames;
296 /* index entry storage, either ours or provided */
302 /* seek table entries only maintained if upstream is BYTE seekable */
303 gboolean upstream_seekable;
304 gboolean upstream_has_duration;
305 gint64 upstream_size;
306 /* minimum distance between two index entries */
307 GstClockTimeDiff idx_interval;
308 guint64 idx_byte_interval;
309 /* ts and offset of last entry added */
310 GstClockTime index_last_ts;
311 gint64 index_last_offset;
312 gboolean index_last_valid;
314 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
315 gboolean exact_position;
316 /* seek events are temporarily kept to match them with newsegments */
317 GSList *pending_seeks;
319 /* reverse playback */
320 GSList *buffers_pending;
321 GSList *buffers_head;
322 GSList *buffers_queued;
323 GSList *buffers_send;
324 GstClockTime last_pts;
325 GstClockTime last_dts;
328 /* Pending serialized events */
329 GList *pending_events;
330 /* Newsegment event to be sent after SEEK */
331 gboolean pending_segment;
333 /* offset of last parsed frame/data */
335 /* force a new frame, regardless of offset */
337 /* whether we are merely scanning for a frame */
339 /* ... and resulting frame, if any */
340 GstBaseParseFrame *scanned_frame;
342 /* TRUE if we're still detecting the format, i.e.
343 * if ::detect() is still called for future buffers */
345 GList *detect_buffers;
346 guint detect_buffers_size;
348 /* if TRUE, a STREAM_START event needs to be pushed */
349 gboolean push_stream_start;
352 typedef struct _GstBaseParseSeek
357 GstClockTime start_ts;
360 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
361 g_mutex_lock (&parse->priv->index_lock);
362 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
363 g_mutex_unlock (&parse->priv->index_lock);
365 static GstElementClass *parent_class = NULL;
367 static void gst_base_parse_class_init (GstBaseParseClass * klass);
368 static void gst_base_parse_init (GstBaseParse * parse,
369 GstBaseParseClass * klass);
372 gst_base_parse_get_type (void)
374 static volatile gsize base_parse_type = 0;
376 if (g_once_init_enter (&base_parse_type)) {
377 static const GTypeInfo base_parse_info = {
378 sizeof (GstBaseParseClass),
379 (GBaseInitFunc) NULL,
380 (GBaseFinalizeFunc) NULL,
381 (GClassInitFunc) gst_base_parse_class_init,
384 sizeof (GstBaseParse),
386 (GInstanceInitFunc) gst_base_parse_init,
390 _type = g_type_register_static (GST_TYPE_ELEMENT,
391 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
392 g_once_init_leave (&base_parse_type, _type);
394 return (GType) base_parse_type;
397 static void gst_base_parse_finalize (GObject * object);
399 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
400 GstStateChange transition);
401 static void gst_base_parse_reset (GstBaseParse * parse);
404 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
405 static GstIndex *gst_base_parse_get_index (GstElement * element);
408 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
410 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
411 GstObject * parent, GstPadMode mode, gboolean active);
412 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
414 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
416 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
418 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
421 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
423 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
426 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
428 static void gst_base_parse_loop (GstPad * pad);
430 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
431 GstBaseParseFrame * frame);
433 static gboolean gst_base_parse_sink_default (GstBaseParse * parse,
436 static gboolean gst_base_parse_src_default (GstBaseParse * parse,
439 static void gst_base_parse_drain (GstBaseParse * parse);
441 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
442 gboolean post_min, gboolean post_avg, gboolean post_max);
444 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
445 GstClockTime time, gboolean before, GstClockTime * _ts);
446 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
447 GstClockTime * _time, gint64 * _offset);
449 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
450 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
453 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
455 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
458 gst_base_parse_clear_queues (GstBaseParse * parse)
460 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
461 g_slist_free (parse->priv->buffers_queued);
462 parse->priv->buffers_queued = NULL;
463 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
465 g_slist_free (parse->priv->buffers_pending);
466 parse->priv->buffers_pending = NULL;
467 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
468 g_slist_free (parse->priv->buffers_head);
469 parse->priv->buffers_head = NULL;
470 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
471 g_slist_free (parse->priv->buffers_send);
472 parse->priv->buffers_send = NULL;
474 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
475 g_list_free (parse->priv->detect_buffers);
476 parse->priv->detect_buffers = NULL;
477 parse->priv->detect_buffers_size = 0;
479 g_queue_foreach (&parse->priv->queued_frames,
480 (GFunc) gst_base_parse_frame_free, NULL);
481 g_queue_clear (&parse->priv->queued_frames);
483 gst_buffer_replace (&parse->priv->cache, NULL);
485 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
486 g_list_free (parse->priv->pending_events);
487 parse->priv->pending_events = NULL;
488 parse->priv->pending_segment = FALSE;
492 gst_base_parse_finalize (GObject * object)
494 GstBaseParse *parse = GST_BASE_PARSE (object);
496 g_object_unref (parse->priv->adapter);
498 if (parse->priv->cache) {
499 gst_buffer_unref (parse->priv->cache);
500 parse->priv->cache = NULL;
503 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
505 g_list_free (parse->priv->pending_events);
506 parse->priv->pending_events = NULL;
507 parse->priv->pending_segment = FALSE;
509 if (parse->priv->index) {
510 gst_object_unref (parse->priv->index);
511 parse->priv->index = NULL;
513 g_mutex_clear (&parse->priv->index_lock);
515 gst_base_parse_clear_queues (parse);
517 G_OBJECT_CLASS (parent_class)->finalize (object);
521 gst_base_parse_class_init (GstBaseParseClass * klass)
523 GObjectClass *gobject_class;
524 GstElementClass *gstelement_class;
526 gobject_class = G_OBJECT_CLASS (klass);
527 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
528 parent_class = g_type_class_peek_parent (klass);
529 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
531 gstelement_class = (GstElementClass *) klass;
532 gstelement_class->change_state =
533 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
536 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
537 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
540 /* Default handlers */
541 klass->sink_event = gst_base_parse_sink_default;
542 klass->src_event = gst_base_parse_src_default;
543 klass->convert = gst_base_parse_convert_default;
545 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
546 "baseparse element");
550 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
552 GstPadTemplate *pad_template;
554 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
556 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
559 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
560 g_return_if_fail (pad_template != NULL);
561 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
562 gst_pad_set_event_function (parse->sinkpad,
563 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
564 gst_pad_set_query_function (parse->sinkpad,
565 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
566 gst_pad_set_chain_function (parse->sinkpad,
567 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
568 gst_pad_set_activate_function (parse->sinkpad,
569 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
570 gst_pad_set_activatemode_function (parse->sinkpad,
571 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
572 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
573 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
575 GST_DEBUG_OBJECT (parse, "sinkpad created");
578 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
579 g_return_if_fail (pad_template != NULL);
580 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
581 gst_pad_set_event_function (parse->srcpad,
582 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
583 gst_pad_set_query_function (parse->srcpad,
584 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
585 gst_pad_use_fixed_caps (parse->srcpad);
586 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
587 GST_DEBUG_OBJECT (parse, "src created");
589 g_queue_init (&parse->priv->queued_frames);
591 parse->priv->adapter = gst_adapter_new ();
593 parse->priv->pad_mode = GST_PAD_MODE_NONE;
595 g_mutex_init (&parse->priv->index_lock);
598 gst_base_parse_reset (parse);
599 GST_DEBUG_OBJECT (parse, "init ok");
601 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
604 static GstBaseParseFrame *
605 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
607 GstBaseParseFrame *copy;
609 copy = g_slice_dup (GstBaseParseFrame, frame);
610 copy->buffer = gst_buffer_ref (frame->buffer);
611 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
613 GST_TRACE ("copied frame %p -> %p", frame, copy);
619 gst_base_parse_frame_free (GstBaseParseFrame * frame)
621 GST_TRACE ("freeing frame %p", frame);
624 gst_buffer_unref (frame->buffer);
625 frame->buffer = NULL;
628 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
629 g_slice_free (GstBaseParseFrame, frame);
631 memset (frame, 0, sizeof (*frame));
635 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
636 (GBoxedCopyFunc) gst_base_parse_frame_copy,
637 (GBoxedFreeFunc) gst_base_parse_frame_free);
640 * gst_base_parse_frame_init:
641 * @frame: #GstBaseParseFrame.
643 * Sets a #GstBaseParseFrame to initial state. Currently this means
644 * all public fields are zero-ed and a private flag is set to make
645 * sure gst_base_parse_frame_free() only frees the contents but not
646 * the actual frame. Use this function to initialise a #GstBaseParseFrame
647 * allocated on the stack.
650 gst_base_parse_frame_init (GstBaseParseFrame * frame)
652 memset (frame, 0, sizeof (GstBaseParseFrame));
653 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
654 GST_TRACE ("inited frame %p", frame);
658 * gst_base_parse_frame_new:
659 * @buffer: (transfer none): a #GstBuffer
661 * @overhead: number of bytes in this frame which should be counted as
662 * metadata overhead, ie. not used to calculate the average bitrate.
663 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
665 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
666 * elements written in C should usually allocate the frame on the stack and
667 * then use gst_base_parse_frame_init() to initialise it.
669 * Returns: a newly-allocated #GstBaseParseFrame. Free with
670 * gst_base_parse_frame_free() when no longer needed.
673 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
676 GstBaseParseFrame *frame;
678 frame = g_slice_new0 (GstBaseParseFrame);
679 frame->buffer = gst_buffer_ref (buffer);
681 GST_TRACE ("created frame %p", frame);
686 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
689 gst_buffer_replace (&frame->buffer, buf);
693 /* set flags one by one for clarity */
694 if (G_UNLIKELY (parse->priv->drain))
695 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
697 /* losing sync is pretty much a discont (and vice versa), no ? */
698 if (G_UNLIKELY (parse->priv->discont))
699 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
703 gst_base_parse_reset (GstBaseParse * parse)
705 GST_OBJECT_LOCK (parse);
706 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
707 parse->priv->duration = -1;
708 parse->priv->min_frame_size = 1;
709 parse->priv->discont = TRUE;
710 parse->priv->flushing = FALSE;
711 parse->priv->offset = 0;
712 parse->priv->sync_offset = 0;
713 parse->priv->update_interval = -1;
714 parse->priv->fps_num = parse->priv->fps_den = 0;
715 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
716 parse->priv->lead_in = parse->priv->lead_out = 0;
717 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
718 parse->priv->bitrate = 0;
719 parse->priv->framecount = 0;
720 parse->priv->bytecount = 0;
721 parse->priv->acc_duration = 0;
722 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
723 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
724 parse->priv->first_frame_offset = -1;
725 parse->priv->estimated_duration = -1;
726 parse->priv->estimated_drift = 0;
727 parse->priv->next_pts = 0;
728 parse->priv->next_dts = 0;
729 parse->priv->syncable = TRUE;
730 parse->priv->passthrough = FALSE;
731 parse->priv->pts_interpolate = TRUE;
732 parse->priv->has_timing_info = FALSE;
733 parse->priv->post_min_bitrate = TRUE;
734 parse->priv->post_avg_bitrate = TRUE;
735 parse->priv->post_max_bitrate = TRUE;
736 parse->priv->min_bitrate = G_MAXUINT;
737 parse->priv->max_bitrate = 0;
738 parse->priv->avg_bitrate = 0;
739 parse->priv->posted_avg_bitrate = 0;
741 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
742 parse->priv->index_last_offset = -1;
743 parse->priv->index_last_valid = TRUE;
744 parse->priv->upstream_seekable = FALSE;
745 parse->priv->upstream_size = 0;
746 parse->priv->upstream_has_duration = FALSE;
747 parse->priv->idx_interval = 0;
748 parse->priv->idx_byte_interval = 0;
749 parse->priv->exact_position = TRUE;
750 parse->priv->seen_keyframe = FALSE;
752 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
753 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
754 parse->priv->last_offset = 0;
756 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
758 g_list_free (parse->priv->pending_events);
759 parse->priv->pending_events = NULL;
760 parse->priv->pending_segment = FALSE;
762 if (parse->priv->cache) {
763 gst_buffer_unref (parse->priv->cache);
764 parse->priv->cache = NULL;
767 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
768 g_slist_free (parse->priv->pending_seeks);
769 parse->priv->pending_seeks = NULL;
771 if (parse->priv->adapter)
772 gst_adapter_clear (parse->priv->adapter);
774 parse->priv->new_frame = TRUE;
776 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
777 g_list_free (parse->priv->detect_buffers);
778 parse->priv->detect_buffers = NULL;
779 parse->priv->detect_buffers_size = 0;
780 GST_OBJECT_UNLOCK (parse);
783 /* gst_base_parse_parse_frame:
784 * @parse: #GstBaseParse.
785 * @buffer: #GstBuffer.
787 * Default callback for parse_frame.
790 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
792 GstBuffer *buffer = frame->buffer;
794 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
795 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
796 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
798 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
799 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
800 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
802 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
803 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
804 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
809 /* gst_base_parse_convert:
810 * @parse: #GstBaseParse.
811 * @src_format: #GstFormat describing the source format.
812 * @src_value: Source value to be converted.
813 * @dest_format: #GstFormat defining the converted format.
814 * @dest_value: Pointer where the conversion result will be put.
816 * Converts using configured "convert" vmethod in #GstBaseParse class.
818 * Returns: TRUE if conversion was successful.
821 gst_base_parse_convert (GstBaseParse * parse,
822 GstFormat src_format,
823 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
825 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
828 g_return_val_if_fail (dest_value != NULL, FALSE);
833 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
835 #ifndef GST_DISABLE_GST_DEBUG
838 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
839 GST_LOG_OBJECT (parse,
840 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
841 GST_TIME_ARGS (src_value), *dest_value);
842 } else if (dest_format == GST_FORMAT_TIME &&
843 src_format == GST_FORMAT_BYTES) {
844 GST_LOG_OBJECT (parse,
845 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
846 src_value, GST_TIME_ARGS (*dest_value));
848 GST_LOG_OBJECT (parse,
849 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
850 GST_STR_NULL (gst_format_get_name (src_format)),
851 GST_STR_NULL (gst_format_get_name (dest_format)),
852 src_value, *dest_value);
855 GST_DEBUG_OBJECT (parse, "conversion failed");
863 /* gst_base_parse_sink_event:
864 * @pad: #GstPad that received the event.
865 * @event: #GstEvent to be handled.
867 * Handler for sink pad events.
869 * Returns: TRUE if the event was handled.
872 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
874 GstBaseParse *parse = GST_BASE_PARSE (parent);
875 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
878 ret = bclass->sink_event (parse, event);
884 /* gst_base_parse_sink_default:
885 * @parse: #GstBaseParse.
886 * @event: #GstEvent to be handled.
888 * Element-level event handler function.
890 * The event will be unreffed only if it has been handled and this
891 * function returns %TRUE
893 * Returns: %TRUE if the event was handled and not need forwarding.
896 gst_base_parse_sink_default (GstBaseParse * parse, GstEvent * event)
898 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
899 gboolean ret = FALSE;
900 gboolean forward_immediate = FALSE;
902 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
903 GST_EVENT_TYPE_NAME (event));
905 switch (GST_EVENT_TYPE (event)) {
910 gst_event_parse_caps (event, &caps);
911 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
913 if (klass->set_sink_caps)
914 ret = klass->set_sink_caps (parse, caps);
918 /* will send our own caps downstream */
919 gst_event_unref (event);
923 case GST_EVENT_SEGMENT:
925 const GstSegment *in_segment;
926 GstSegment out_segment;
927 gint64 offset = 0, next_dts;
929 gst_event_parse_segment (event, &in_segment);
930 gst_segment_init (&out_segment, GST_FORMAT_TIME);
932 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
934 if (in_segment->format == GST_FORMAT_BYTES) {
935 GstBaseParseSeek *seek = NULL;
938 /* stop time is allowed to be open-ended, but not start & pos */
939 offset = in_segment->time;
941 GST_OBJECT_LOCK (parse);
942 for (node = parse->priv->pending_seeks; node; node = node->next) {
943 GstBaseParseSeek *tmp = node->data;
945 if (tmp->offset == offset) {
950 parse->priv->pending_seeks =
951 g_slist_remove (parse->priv->pending_seeks, seek);
952 GST_OBJECT_UNLOCK (parse);
955 GST_DEBUG_OBJECT (parse,
956 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
957 seek->accurate ? " accurate" : "", &seek->segment);
959 out_segment.start = seek->segment.start;
960 out_segment.stop = seek->segment.stop;
961 out_segment.time = seek->segment.start;
963 next_dts = seek->start_ts;
964 parse->priv->exact_position = seek->accurate;
967 /* best attempt convert */
968 /* as these are only estimates, stop is kept open-ended to avoid
969 * premature cutting */
970 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
971 GST_FORMAT_TIME, (gint64 *) & next_dts);
973 out_segment.start = next_dts;
974 out_segment.stop = GST_CLOCK_TIME_NONE;
975 out_segment.time = next_dts;
977 parse->priv->exact_position = (in_segment->start == 0);
980 gst_event_unref (event);
982 event = gst_event_new_segment (&out_segment);
984 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
985 GST_SEGMENT_FORMAT, in_segment);
987 } else if (in_segment->format != GST_FORMAT_TIME) {
988 /* Unknown incoming segment format. Output a default open-ended
990 gst_event_unref (event);
992 out_segment.start = 0;
993 out_segment.stop = GST_CLOCK_TIME_NONE;
994 out_segment.time = 0;
996 event = gst_event_new_segment (&out_segment);
1000 /* not considered BYTE seekable if it is talking to us in TIME,
1001 * whatever else it might claim */
1002 parse->priv->upstream_seekable = FALSE;
1003 next_dts = in_segment->start;
1006 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1009 gst_segment_set_newsegment (&parse->segment, update, rate,
1010 applied_rate, format, start, stop, start);
1013 /* save the segment for later, right before we push a new buffer so that
1014 * the caps are fixed and the next linked element can receive
1016 parse->priv->pending_segment = TRUE;
1019 /* but finish the current segment */
1020 GST_DEBUG_OBJECT (parse, "draining current segment");
1021 if (in_segment->rate > 0.0)
1022 gst_base_parse_drain (parse);
1024 gst_base_parse_finish_fragment (parse, FALSE);
1025 gst_adapter_clear (parse->priv->adapter);
1027 parse->priv->offset = offset;
1028 parse->priv->sync_offset = offset;
1029 parse->priv->next_dts = next_dts;
1030 if (parse->priv->pts_interpolate)
1031 parse->priv->next_pts = next_dts;
1032 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1033 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1034 parse->priv->discont = TRUE;
1035 parse->priv->seen_keyframe = FALSE;
1039 case GST_EVENT_FLUSH_START:
1040 GST_OBJECT_LOCK (parse);
1041 parse->priv->flushing = TRUE;
1042 GST_OBJECT_UNLOCK (parse);
1045 case GST_EVENT_FLUSH_STOP:
1046 gst_adapter_clear (parse->priv->adapter);
1047 gst_base_parse_clear_queues (parse);
1048 parse->priv->flushing = FALSE;
1049 parse->priv->discont = TRUE;
1050 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1051 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1052 parse->priv->new_frame = TRUE;
1054 forward_immediate = TRUE;
1058 if (parse->segment.rate > 0.0)
1059 gst_base_parse_drain (parse);
1061 gst_base_parse_finish_fragment (parse, TRUE);
1063 /* If we STILL have zero frames processed, fire an error */
1064 if (parse->priv->framecount == 0) {
1065 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1066 ("No valid frames found before end of stream"), (NULL));
1068 /* newsegment and other serialized events before eos */
1069 if (G_UNLIKELY (parse->priv->pending_events)) {
1072 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1073 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1075 g_list_free (parse->priv->pending_events);
1076 parse->priv->pending_events = NULL;
1077 parse->priv->pending_segment = FALSE;
1079 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1080 /* We've not posted bitrate tags yet - do so now */
1081 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1083 forward_immediate = TRUE;
1085 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1086 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1087 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1088 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1091 const GstStructure *s;
1092 gboolean ev_still_state;
1094 s = gst_event_get_structure (event);
1096 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1097 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1098 if (ev_still_state) {
1099 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1100 if (parse->segment.rate > 0.0)
1101 gst_base_parse_drain (parse);
1103 gst_base_parse_finish_fragment (parse, TRUE);
1105 forward_immediate = TRUE;
1111 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1112 if (parse->segment.rate > 0.0)
1113 gst_base_parse_drain (parse);
1115 gst_base_parse_finish_fragment (parse, TRUE);
1116 forward_immediate = TRUE;
1120 /* See if any bitrate tags were posted */
1121 gst_base_parse_handle_tag (parse, event);
1124 case GST_EVENT_STREAM_START:
1125 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1126 forward_immediate = TRUE;
1133 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1134 * For EOS this is required because no buffer or serialized event
1135 * will come after EOS and nothing could trigger another
1136 * _finish_frame() call. *
1137 * If the subclass handles sending of EOS manually it can return
1138 * _DROPPED from ::finish() and all other subclasses should have
1139 * decoded/flushed all remaining data before this
1141 * For FLUSH_STOP this is required because it is expected
1142 * to be forwarded immediately and no buffers are queued anyway.
1145 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1146 ret = gst_pad_push_event (parse->srcpad, event);
1148 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1149 parse->priv->pending_events =
1150 g_list_prepend (parse->priv->pending_events, event);
1151 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1156 GST_DEBUG_OBJECT (parse, "event handled");
1162 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1164 GstBaseParse *parse;
1165 GstBaseParseClass *bclass;
1168 parse = GST_BASE_PARSE (parent);
1169 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1171 switch (GST_QUERY_TYPE (query)) {
1172 case GST_QUERY_CAPS:
1174 if (bclass->get_sink_caps) {
1175 GstCaps *caps, *filter;
1177 gst_query_parse_caps (query, &filter);
1178 caps = bclass->get_sink_caps (parse, filter);
1179 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1181 gst_query_set_caps_result (query, caps);
1182 gst_caps_unref (caps);
1186 GstCaps *caps, *template_caps, *filter;
1188 gst_query_parse_caps (query, &filter);
1189 template_caps = gst_pad_get_pad_template_caps (pad);
1190 if (filter != NULL) {
1192 gst_caps_intersect_full (filter, template_caps,
1193 GST_CAPS_INTERSECT_FIRST);
1194 gst_caps_unref (template_caps);
1196 caps = template_caps;
1198 gst_query_set_caps_result (query, caps);
1199 gst_caps_unref (caps);
1207 res = gst_pad_query_default (pad, parent, query);
1216 /* gst_base_parse_src_event:
1217 * @pad: #GstPad that received the event.
1218 * @event: #GstEvent that was received.
1220 * Handler for source pad events.
1222 * Returns: TRUE if the event was handled.
1225 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1227 GstBaseParse *parse;
1228 GstBaseParseClass *bclass;
1229 gboolean ret = TRUE;
1231 parse = GST_BASE_PARSE (parent);
1232 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1234 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1235 GST_EVENT_TYPE_NAME (event));
1237 if (bclass->src_event)
1238 ret = bclass->src_event (parse, event);
1240 gst_event_unref (event);
1246 gst_base_parse_is_seekable (GstBaseParse * parse)
1248 /* FIXME: could do more here, e.g. check index or just send data from 0
1249 * in pull mode and let decoder/sink clip */
1250 return parse->priv->syncable;
1253 /* gst_base_parse_src_default:
1254 * @parse: #GstBaseParse.
1255 * @event: #GstEvent that was received.
1257 * Default srcpad event handler.
1259 * Returns: TRUE if the event was handled and can be dropped.
1262 gst_base_parse_src_default (GstBaseParse * parse, GstEvent * event)
1264 gboolean res = FALSE;
1266 switch (GST_EVENT_TYPE (event)) {
1267 case GST_EVENT_SEEK:
1268 if (gst_base_parse_is_seekable (parse))
1269 res = gst_base_parse_handle_seek (parse, event);
1272 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1281 * gst_base_parse_convert_default:
1282 * @parse: #GstBaseParse.
1283 * @src_format: #GstFormat describing the source format.
1284 * @src_value: Source value to be converted.
1285 * @dest_format: #GstFormat defining the converted format.
1286 * @dest_value: Pointer where the conversion result will be put.
1288 * Default implementation of "convert" vmethod in #GstBaseParse class.
1290 * Returns: TRUE if conversion was successful.
1293 gst_base_parse_convert_default (GstBaseParse * parse,
1294 GstFormat src_format,
1295 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1297 gboolean ret = FALSE;
1298 guint64 bytes, duration;
1300 if (G_UNLIKELY (src_format == dest_format)) {
1301 *dest_value = src_value;
1305 if (G_UNLIKELY (src_value == -1)) {
1310 if (G_UNLIKELY (src_value == 0)) {
1315 /* need at least some frames */
1316 if (!parse->priv->framecount)
1319 duration = parse->priv->acc_duration / GST_MSECOND;
1320 bytes = parse->priv->bytecount;
1322 if (G_UNLIKELY (!duration || !bytes))
1323 goto no_duration_bytes;
1325 if (src_format == GST_FORMAT_BYTES) {
1326 if (dest_format == GST_FORMAT_TIME) {
1327 /* BYTES -> TIME conversion */
1328 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1329 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1330 *dest_value *= GST_MSECOND;
1331 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1332 *dest_value / GST_MSECOND);
1335 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1337 } else if (src_format == GST_FORMAT_TIME) {
1338 if (dest_format == GST_FORMAT_BYTES) {
1339 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1340 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1342 GST_DEBUG_OBJECT (parse,
1343 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1344 src_value / GST_MSECOND, *dest_value);
1347 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1349 } else if (src_format == GST_FORMAT_DEFAULT) {
1350 /* DEFAULT == frame-based */
1351 if (dest_format == GST_FORMAT_TIME) {
1352 GST_DEBUG_OBJECT (parse, "converting default -> time");
1353 if (parse->priv->fps_den) {
1354 *dest_value = gst_util_uint64_scale (src_value,
1355 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1359 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1362 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1369 GST_DEBUG_OBJECT (parse, "no framecount");
1374 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1375 G_GUINT64_FORMAT, duration, bytes);
1382 gst_base_parse_update_duration (GstBaseParse * baseparse)
1385 GstBaseParse *parse;
1387 parse = GST_BASE_PARSE (baseparse);
1389 peer = gst_pad_get_peer (parse->sinkpad);
1391 gboolean qres = FALSE;
1392 gint64 ptot, dest_value;
1394 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1395 gst_object_unref (GST_OBJECT (peer));
1397 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1398 GST_FORMAT_TIME, &dest_value)) {
1400 /* inform if duration changed, but try to avoid spamming */
1401 parse->priv->estimated_drift +=
1402 dest_value - parse->priv->estimated_duration;
1403 if (parse->priv->estimated_drift > GST_SECOND ||
1404 parse->priv->estimated_drift < -GST_SECOND) {
1405 gst_element_post_message (GST_ELEMENT (parse),
1406 gst_message_new_duration_changed (GST_OBJECT (parse)));
1407 parse->priv->estimated_drift = 0;
1409 parse->priv->estimated_duration = dest_value;
1410 GST_LOG_OBJECT (parse,
1411 "updated estimated duration to %" GST_TIME_FORMAT,
1412 GST_TIME_ARGS (dest_value));
1419 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1420 gboolean post_avg, gboolean post_max)
1422 GstTagList *taglist = NULL;
1424 if (post_min && parse->priv->post_min_bitrate) {
1425 taglist = gst_tag_list_new_empty ();
1427 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1428 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1431 if (post_avg && parse->priv->post_avg_bitrate) {
1432 if (taglist == NULL)
1433 taglist = gst_tag_list_new_empty ();
1435 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1436 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1437 parse->priv->avg_bitrate, NULL);
1440 if (post_max && parse->priv->post_max_bitrate) {
1441 if (taglist == NULL)
1442 taglist = gst_tag_list_new_empty ();
1444 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1445 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1448 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1449 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1450 parse->priv->max_bitrate);
1452 if (taglist != NULL) {
1453 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1457 /* gst_base_parse_update_bitrates:
1458 * @parse: #GstBaseParse.
1459 * @buffer: Current frame as a #GstBuffer
1461 * Keeps track of the minimum and maximum bitrates, and also maintains a
1462 * running average bitrate of the stream so far.
1465 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1467 /* Only update the tag on a 10 kbps delta */
1468 static const gint update_threshold = 10000;
1470 guint64 data_len, frame_dur;
1471 gint overhead, frame_bitrate, old_avg_bitrate;
1472 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1473 GstBuffer *buffer = frame->buffer;
1475 overhead = frame->overhead;
1479 data_len = gst_buffer_get_size (buffer) - overhead;
1480 parse->priv->data_bytecount += data_len;
1482 /* duration should be valid by now,
1483 * either set by subclass or maybe based on fps settings */
1484 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1485 /* Calculate duration of a frame from buffer properties */
1486 frame_dur = GST_BUFFER_DURATION (buffer);
1487 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1488 parse->priv->acc_duration;
1491 /* No way to figure out frame duration (is this even possible?) */
1495 /* override if subclass provided bitrate, e.g. metadata based */
1496 if (parse->priv->bitrate) {
1497 parse->priv->avg_bitrate = parse->priv->bitrate;
1498 /* spread this (confirmed) info ASAP */
1499 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1500 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1504 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1508 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1509 parse->priv->avg_bitrate);
1511 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1513 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1514 /* always post all at threshold time */
1515 update_min = update_max = update_avg = TRUE;
1518 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1519 if (frame_bitrate < parse->priv->min_bitrate) {
1520 parse->priv->min_bitrate = frame_bitrate;
1524 if (frame_bitrate > parse->priv->max_bitrate) {
1525 parse->priv->max_bitrate = frame_bitrate;
1529 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1530 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1531 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1536 if ((update_min || update_avg || update_max))
1537 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1544 * gst_base_parse_add_index_entry:
1545 * @parse: #GstBaseParse.
1546 * @offset: offset of entry
1547 * @ts: timestamp associated with offset
1548 * @key: whether entry refers to keyframe
1549 * @force: add entry disregarding sanity checks
1551 * Adds an entry to the index associating @offset to @ts. It is recommended
1552 * to only add keyframe entries. @force allows to bypass checks, such as
1553 * whether the stream is (upstream) seekable, another entry is already "close"
1554 * to the new entry, etc.
1556 * Returns: #gboolean indicating whether entry was added
1559 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1560 GstClockTime ts, gboolean key, gboolean force)
1562 gboolean ret = FALSE;
1563 GstIndexAssociation associations[2];
1565 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1566 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1568 if (G_LIKELY (!force)) {
1570 if (!parse->priv->upstream_seekable) {
1571 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1575 /* FIXME need better helper data structure that handles these issues
1576 * related to ongoing collecting of index entries */
1577 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1579 GST_LOG_OBJECT (parse,
1580 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1581 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1585 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1586 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1587 parse->priv->idx_interval) {
1588 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1589 GST_TIME_ARGS (parse->priv->index_last_ts));
1593 /* if last is not really the last one */
1594 if (!parse->priv->index_last_valid) {
1595 GstClockTime prev_ts;
1597 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1598 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1599 GST_LOG_OBJECT (parse,
1600 "entry too close to existing entry %" GST_TIME_FORMAT,
1601 GST_TIME_ARGS (prev_ts));
1602 parse->priv->index_last_offset = offset;
1603 parse->priv->index_last_ts = ts;
1609 associations[0].format = GST_FORMAT_TIME;
1610 associations[0].value = ts;
1611 associations[1].format = GST_FORMAT_BYTES;
1612 associations[1].value = offset;
1614 /* index might change on-the-fly, although that would be nutty app ... */
1615 GST_BASE_PARSE_INDEX_LOCK (parse);
1616 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1617 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1618 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1619 (const GstIndexAssociation *) &associations);
1620 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1623 parse->priv->index_last_offset = offset;
1624 parse->priv->index_last_ts = ts;
1633 /* check for seekable upstream, above and beyond a mere query */
1635 gst_base_parse_check_seekability (GstBaseParse * parse)
1638 gboolean seekable = FALSE;
1639 gint64 start = -1, stop = -1;
1640 guint idx_interval = 0;
1641 guint64 idx_byte_interval = 0;
1643 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1644 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1645 GST_DEBUG_OBJECT (parse, "seeking query failed");
1649 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1651 /* try harder to query upstream size if we didn't get it the first time */
1652 if (seekable && stop == -1) {
1653 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1654 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1657 /* if upstream doesn't know the size, it's likely that it's not seekable in
1658 * practice even if it technically may be seekable */
1659 if (seekable && (start != 0 || stop <= start)) {
1660 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1664 /* let's not put every single frame into our index */
1666 if (stop < 10 * 1024 * 1024)
1668 else if (stop < 100 * 1024 * 1024)
1671 idx_interval = 1000;
1673 /* ensure that even for large files (e.g. very long audio files), the index
1674 * stays reasonably-size, with some arbitrary limit to the total number of
1676 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1677 GST_DEBUG_OBJECT (parse,
1678 "Limiting index entries to %d, indexing byte interval %"
1679 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1683 gst_query_unref (query);
1685 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1686 G_GUINT64_FORMAT ")", seekable, start, stop);
1687 parse->priv->upstream_seekable = seekable;
1688 parse->priv->upstream_size = seekable ? stop : 0;
1690 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1691 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1692 parse->priv->idx_byte_interval = idx_byte_interval;
1695 /* some misc checks on upstream */
1697 gst_base_parse_check_upstream (GstBaseParse * parse)
1701 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1702 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1703 /* upstream has one, accept it also, and no further updates */
1704 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1705 parse->priv->upstream_has_duration = TRUE;
1708 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1709 parse->priv->upstream_has_duration);
1712 /* checks src caps to determine if dealing with audio or video */
1713 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1715 gst_base_parse_check_media (GstBaseParse * parse)
1720 caps = gst_pad_get_current_caps (parse->srcpad);
1721 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1722 parse->priv->is_video =
1723 g_str_has_prefix (gst_structure_get_name (s), "video");
1725 /* historical default */
1726 parse->priv->is_video = FALSE;
1729 gst_caps_unref (caps);
1731 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1734 /* takes ownership of frame */
1736 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1738 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1739 /* frame allocated on the heap, we can just take ownership */
1740 g_queue_push_tail (&parse->priv->queued_frames, frame);
1741 GST_TRACE ("queued frame %p", frame);
1743 GstBaseParseFrame *copy;
1745 /* probably allocated on the stack, must make a proper copy */
1746 copy = gst_base_parse_frame_copy (frame);
1747 g_queue_push_tail (&parse->priv->queued_frames, copy);
1748 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1749 gst_base_parse_frame_free (frame);
1753 /* makes sure that @buf is properly prepared and decorated for passing
1754 * to baseclass, and an equally setup frame is returned setup with @buf.
1755 * Takes ownership of @buf. */
1756 static GstBaseParseFrame *
1757 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1759 GstBaseParseFrame *frame = NULL;
1761 buffer = gst_buffer_make_writable (buffer);
1763 GST_LOG_OBJECT (parse,
1764 "preparing frame at offset %" G_GUINT64_FORMAT
1765 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1766 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1767 gst_buffer_get_size (buffer));
1769 if (parse->priv->discont) {
1770 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1771 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1772 parse->priv->discont = FALSE;
1775 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1777 frame = gst_base_parse_frame_new (buffer, 0, 0);
1779 /* also ensure to update state flags */
1780 gst_base_parse_frame_update (parse, frame, buffer);
1781 gst_buffer_unref (buffer);
1783 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1784 GST_LOG_OBJECT (parse, "marking as new frame");
1785 parse->priv->new_frame = FALSE;
1786 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1789 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1791 /* use default handler to provide initial (upstream) metadata */
1792 gst_base_parse_parse_frame (parse, frame);
1797 /* Wraps buffer in a frame and dispatches to subclass.
1798 * Also manages data skipping and offset handling (including adapter flushing).
1799 * Takes ownership of @buffer */
1800 static GstFlowReturn
1801 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1802 gint * skip, gint * flushed)
1804 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1805 GstBaseParseFrame *frame;
1808 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1810 GST_LOG_OBJECT (parse,
1811 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1812 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1813 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1814 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1815 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1817 /* track what is being flushed during this single round of frame processing */
1818 parse->priv->flushed = 0;
1821 /* make it easy for _finish_frame to pick up input data */
1822 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1823 gst_buffer_ref (buffer);
1824 gst_adapter_push (parse->priv->adapter, buffer);
1827 frame = gst_base_parse_prepare_frame (parse, buffer);
1828 ret = klass->handle_frame (parse, frame, skip);
1830 *flushed = parse->priv->flushed;
1832 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1835 /* subclass can only do one of these, or semantics are too unclear */
1836 g_assert (*skip == 0 || *flushed == 0);
1838 /* track skipping */
1840 GstClockTime pts, dts;
1843 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1844 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1845 /* reverse playback, and no frames found yet, so we are skipping
1846 * the leading part of a fragment, which may form the tail of
1847 * fragment coming later, hopefully subclass skips efficiently ... */
1848 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1849 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1850 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1851 outbuf = gst_buffer_make_writable (outbuf);
1852 GST_BUFFER_PTS (outbuf) = pts;
1853 GST_BUFFER_DTS (outbuf) = dts;
1854 parse->priv->buffers_head =
1855 g_slist_prepend (parse->priv->buffers_head, outbuf);
1858 gst_adapter_flush (parse->priv->adapter, *skip);
1860 if (!parse->priv->discont)
1861 parse->priv->sync_offset = parse->priv->offset;
1862 parse->priv->offset += *skip;
1863 parse->priv->discont = TRUE;
1864 /* check for indefinite skipping */
1865 if (ret == GST_FLOW_OK)
1866 ret = gst_base_parse_check_sync (parse);
1869 parse->priv->offset += *flushed;
1871 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1872 gst_adapter_clear (parse->priv->adapter);
1875 gst_base_parse_frame_free (frame);
1880 /* gst_base_parse_handle_and_push_buffer:
1881 * @parse: #GstBaseParse.
1882 * @klass: #GstBaseParseClass.
1883 * @frame: (transfer full): a #GstBaseParseFrame
1885 * Parses the frame from given buffer and pushes it forward. Also performs
1886 * timestamp handling and checks the segment limits.
1888 * This is called with srcpad STREAM_LOCK held.
1890 * Returns: #GstFlowReturn
1892 static GstFlowReturn
1893 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1894 GstBaseParseFrame * frame)
1899 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1901 buffer = frame->buffer;
1902 offset = frame->offset;
1904 /* check if subclass/format can provide ts.
1905 * If so, that allows and enables extra seek and duration determining options */
1906 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1907 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
1908 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1909 parse->priv->first_frame_offset = offset;
1910 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
1911 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
1912 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
1913 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
1914 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
1915 GST_TIME_ARGS (parse->priv->first_frame_pts),
1916 parse->priv->first_frame_offset);
1917 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1919 GstClockTime last_ts = G_MAXINT64;
1921 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1922 gst_base_parse_locate_time (parse, &last_ts, &off);
1923 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1924 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1927 /* disable further checks */
1928 parse->priv->first_frame_offset = 0;
1932 /* again use default handler to add missing metadata;
1933 * we may have new information on frame properties */
1934 gst_base_parse_parse_frame (parse, frame);
1936 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1937 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
1938 parse->priv->next_dts =
1939 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
1940 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
1941 GstClockTime next_pts =
1942 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
1943 if (next_pts >= parse->priv->next_dts)
1944 parse->priv->next_pts = next_pts;
1947 /* we lost track, do not produce bogus time next time around
1948 * (probably means parser subclass has given up on parsing as well) */
1949 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
1950 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
1953 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
1954 GST_BUFFER_PTS_IS_VALID (buffer))
1955 gst_base_parse_add_index_entry (parse, offset,
1956 GST_BUFFER_PTS (buffer),
1957 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
1959 /* All OK, push queued frames if there are any */
1960 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
1961 GstBaseParseFrame *queued_frame;
1963 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
1964 gst_base_parse_push_frame (parse, queued_frame);
1968 return gst_base_parse_push_frame (parse, frame);
1972 * gst_base_parse_push_frame:
1973 * @parse: #GstBaseParse.
1974 * @frame: (transfer none): a #GstBaseParseFrame
1976 * Pushes the frame's buffer downstream, sends any pending events and
1977 * does some timestamp and segment handling. Takes ownership of
1978 * frame's buffer, though caller retains ownership of @frame.
1980 * This must be called with sinkpad STREAM_LOCK held.
1982 * Returns: #GstFlowReturn
1985 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1987 GstFlowReturn ret = GST_FLOW_OK;
1988 GstClockTime last_start = GST_CLOCK_TIME_NONE;
1989 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
1990 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1994 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1995 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
1997 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
1999 buffer = frame->buffer;
2001 GST_LOG_OBJECT (parse,
2002 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2003 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2004 gst_buffer_get_size (buffer),
2005 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2006 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2007 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2010 parse->priv->bytecount += frame->size;
2011 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2012 parse->priv->framecount++;
2013 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2014 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2017 /* 0 means disabled */
2018 if (parse->priv->update_interval < 0)
2019 parse->priv->update_interval = 50;
2020 else if (parse->priv->update_interval > 0 &&
2021 (parse->priv->framecount % parse->priv->update_interval) == 0)
2022 gst_base_parse_update_duration (parse);
2024 if (GST_BUFFER_PTS_IS_VALID (buffer))
2025 last_start = last_stop = GST_BUFFER_PTS (buffer);
2026 if (last_start != GST_CLOCK_TIME_NONE
2027 && GST_BUFFER_DURATION_IS_VALID (buffer))
2028 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2030 /* should have caps by now */
2031 if (!gst_pad_has_current_caps (parse->srcpad))
2034 if (G_UNLIKELY (parse->priv->pending_segment)) {
2035 /* have caps; check identity */
2036 gst_base_parse_check_media (parse);
2039 /* Push pending events, including NEWSEGMENT events */
2040 if (G_UNLIKELY (parse->priv->pending_events)) {
2041 GList *r = g_list_reverse (parse->priv->pending_events);
2044 parse->priv->pending_events = NULL;
2045 for (l = r; l != NULL; l = l->next) {
2046 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2049 parse->priv->pending_segment = FALSE;
2052 /* segment adjustment magic; only if we are running the whole show */
2053 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2054 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2055 parse->priv->upstream_seekable)) {
2057 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2058 GST_CLOCK_TIME_IS_VALID (last_start)) {
2059 GstClockTimeDiff diff;
2061 /* only send newsegments with increasing start times,
2062 * otherwise if these go back and forth downstream (sinks) increase
2063 * accumulated time and running_time */
2064 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2065 if (G_UNLIKELY (diff > 2 * GST_SECOND
2066 && last_start > parse->segment.start
2067 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2068 || last_start < parse->segment.stop))) {
2070 GST_DEBUG_OBJECT (parse,
2071 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2072 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2073 "Sending updated NEWSEGMENT events", diff,
2074 GST_TIME_ARGS (parse->segment.position),
2075 GST_TIME_ARGS (last_start));
2077 /* skip gap FIXME */
2078 gst_pad_push_event (parse->srcpad,
2079 gst_event_new_segment (&parse->segment));
2081 parse->segment.position = last_start;
2086 /* update bitrates and optionally post corresponding tags
2087 * (following newsegment) */
2088 gst_base_parse_update_bitrates (parse, frame);
2090 if (klass->pre_push_frame) {
2091 ret = klass->pre_push_frame (parse, frame);
2093 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2096 /* take final ownership of frame buffer */
2097 if (frame->out_buffer) {
2098 buffer = frame->out_buffer;
2099 frame->out_buffer = NULL;
2100 gst_buffer_replace (&frame->buffer, NULL);
2102 buffer = frame->buffer;
2103 frame->buffer = NULL;
2106 /* subclass must play nice */
2107 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2109 size = gst_buffer_get_size (buffer);
2111 parse->priv->seen_keyframe |= parse->priv->is_video &&
2112 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2114 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2115 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2116 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2117 GST_BUFFER_TIMESTAMP (buffer) >
2118 parse->segment.stop + parse->priv->lead_out_ts) {
2119 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2121 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2122 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2123 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2124 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2125 parse->priv->lead_in_ts < parse->segment.start) {
2126 if (parse->priv->seen_keyframe) {
2127 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2130 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2131 ret = GST_BASE_PARSE_FLOW_DROPPED;
2138 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2139 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2140 gst_buffer_unref (buffer);
2142 } else if (ret == GST_FLOW_OK) {
2143 if (parse->segment.rate > 0.0) {
2144 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2146 ret = gst_pad_push (parse->srcpad, buffer);
2147 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2149 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2151 parse->priv->buffers_queued =
2152 g_slist_prepend (parse->priv->buffers_queued, buffer);
2156 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2157 size, gst_flow_get_name (ret));
2158 gst_buffer_unref (buffer);
2159 /* if we are not sufficiently in control, let upstream decide on EOS */
2160 if (ret == GST_FLOW_EOS &&
2161 (parse->priv->passthrough ||
2162 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2163 !parse->priv->upstream_seekable)))
2167 /* Update current running segment position */
2168 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2169 parse->segment.position < last_stop)
2170 parse->segment.position = last_stop;
2177 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2178 return GST_FLOW_ERROR;
2183 * gst_base_parse_finish_frame:
2184 * @parse: a #GstBaseParse
2185 * @frame: a #GstBaseParseFrame
2186 * @size: consumed input data represented by frame
2188 * Collects parsed data and pushes this downstream.
2189 * Source pad caps must be set when this is called.
2191 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2192 * Otherwise, @size samples will be taken from the input and used for output,
2193 * and the output's metadata (timestamps etc) will be taken as (optionally)
2194 * set by the subclass on @frame's (input) buffer (which is otherwise
2195 * ignored for any but the above purpose/information).
2197 * Note that the latter buffer is invalidated by this call, whereas the
2198 * caller retains ownership of @frame.
2200 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2203 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2206 GstFlowReturn ret = GST_FLOW_OK;
2208 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2209 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2210 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2211 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2214 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2215 "flushing size %d", frame->offset, size);
2217 /* some one-time start-up */
2218 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2219 gst_base_parse_check_seekability (parse);
2220 gst_base_parse_check_upstream (parse);
2223 parse->priv->flushed += size;
2225 if (parse->priv->scanning && frame->buffer) {
2226 if (!parse->priv->scanned_frame) {
2227 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2232 /* either PUSH or PULL mode arranges for adapter data */
2233 /* ensure output buffer */
2234 if (!frame->out_buffer) {
2235 GstBuffer *src, *dest;
2237 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2238 dest = frame->out_buffer;
2239 src = frame->buffer;
2240 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2241 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2242 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2243 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2244 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2245 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2247 gst_adapter_flush (parse->priv->adapter, size);
2250 /* use as input for subsequent processing */
2251 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2252 gst_buffer_unref (frame->out_buffer);
2253 frame->out_buffer = NULL;
2255 /* mark input size consumed */
2258 /* subclass might queue frames/data internally if it needs more
2259 * frames to decide on the format, or might request us to queue here. */
2260 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2261 gst_buffer_replace (&frame->buffer, NULL);
2263 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2264 GstBaseParseFrame *copy;
2266 copy = gst_base_parse_frame_copy (frame);
2267 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2268 gst_base_parse_queue_frame (parse, copy);
2272 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2278 /* gst_base_parse_drain:
2280 * Drains the adapter until it is empty. It decreases the min_frame_size to
2281 * match the current adapter size and calls chain method until the adapter
2282 * is emptied or chain returns with error.
2285 gst_base_parse_drain (GstBaseParse * parse)
2289 GST_DEBUG_OBJECT (parse, "draining");
2290 parse->priv->drain = TRUE;
2293 avail = gst_adapter_available (parse->priv->adapter);
2297 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2298 NULL) != GST_FLOW_OK) {
2302 /* nothing changed, maybe due to truncated frame; break infinite loop */
2303 if (avail == gst_adapter_available (parse->priv->adapter)) {
2304 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2305 gst_adapter_clear (parse->priv->adapter);
2309 parse->priv->drain = FALSE;
2312 /* gst_base_parse_send_buffers
2314 * Sends buffers collected in send_buffers downstream, and ensures that list
2315 * is empty at the end (errors or not).
2317 static GstFlowReturn
2318 gst_base_parse_send_buffers (GstBaseParse * parse)
2320 GSList *send = NULL;
2322 GstFlowReturn ret = GST_FLOW_OK;
2324 send = parse->priv->buffers_send;
2328 buf = GST_BUFFER_CAST (send->data);
2329 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2330 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2331 ", offset %" G_GINT64_FORMAT, buf,
2332 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2333 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2334 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2336 /* iterate output queue an push downstream */
2337 ret = gst_pad_push (parse->srcpad, buf);
2338 send = g_slist_delete_link (send, send);
2340 /* clear any leftover if error */
2341 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2343 buf = GST_BUFFER_CAST (send->data);
2344 gst_buffer_unref (buf);
2345 send = g_slist_delete_link (send, send);
2350 parse->priv->buffers_send = send;
2355 /* gst_base_parse_start_fragment:
2357 * Prepares for processing a reverse playback (forward) fragment
2358 * by (re)setting proper state variables.
2360 static GstFlowReturn
2361 gst_base_parse_start_fragment (GstBaseParse * parse)
2363 GST_LOG_OBJECT (parse, "starting fragment");
2365 /* invalidate so no fall-back timestamping is performed;
2366 * ok if taken from subclass or upstream */
2367 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2368 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2369 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2370 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2371 /* prevent it hanging around stop all the time */
2372 parse->segment.position = GST_CLOCK_TIME_NONE;
2374 parse->priv->discont = TRUE;
2376 /* head of previous fragment is now pending tail of current fragment */
2377 parse->priv->buffers_pending = parse->priv->buffers_head;
2378 parse->priv->buffers_head = NULL;
2384 /* gst_base_parse_finish_fragment:
2386 * Processes a reverse playback (forward) fragment:
2387 * - append head of last fragment that was skipped to current fragment data
2388 * - drain the resulting current fragment data (i.e. repeated chain)
2389 * - add time/duration (if needed) to frames queued by chain
2390 * - push queued data
2392 static GstFlowReturn
2393 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2396 GstFlowReturn ret = GST_FLOW_OK;
2397 gboolean seen_key = FALSE, seen_delta = FALSE;
2399 GST_LOG_OBJECT (parse, "finishing fragment");
2402 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2403 while (parse->priv->buffers_pending) {
2404 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2406 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2407 gst_buffer_get_size (buf));
2408 gst_adapter_push (parse->priv->adapter, buf);
2410 GST_LOG_OBJECT (parse, "discarding head buffer");
2411 gst_buffer_unref (buf);
2413 parse->priv->buffers_pending =
2414 g_slist_delete_link (parse->priv->buffers_pending,
2415 parse->priv->buffers_pending);
2418 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2419 /* initial skipped data is added to buffers_pending */
2420 gst_base_parse_drain (parse);
2422 if (parse->priv->buffers_send) {
2423 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2424 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2427 /* add metadata (if needed to queued buffers */
2428 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2429 GST_TIME_ARGS (parse->priv->last_pts));
2430 while (parse->priv->buffers_queued) {
2431 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2433 /* no touching if upstream or parsing provided time */
2434 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2435 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2436 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2437 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2438 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2439 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2440 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2442 parse->priv->last_pts = 0;
2443 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2444 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2445 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2447 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2448 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2449 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2451 parse->priv->last_dts = 0;
2452 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2453 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2454 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2457 /* no idea, very bad */
2458 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2461 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2462 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2464 /* reverse order for ascending sending */
2465 /* send downstream at keyframe not preceded by a keyframe
2466 * (e.g. that should identify start of collection of IDR nals) */
2467 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2469 ret = gst_base_parse_send_buffers (parse);
2470 /* if a problem, throw all to sending */
2471 if (ret != GST_FLOW_OK) {
2472 parse->priv->buffers_send =
2473 g_slist_reverse (parse->priv->buffers_queued);
2474 parse->priv->buffers_queued = NULL;
2484 parse->priv->buffers_send =
2485 g_slist_prepend (parse->priv->buffers_send, buf);
2486 parse->priv->buffers_queued =
2487 g_slist_delete_link (parse->priv->buffers_queued,
2488 parse->priv->buffers_queued);
2491 /* audio may have all marked as keyframe, so arrange to send here */
2493 ret = gst_base_parse_send_buffers (parse);
2495 /* any trailing unused no longer usable (ideally none) */
2496 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2497 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2498 gst_adapter_available (parse->priv->adapter));
2499 gst_adapter_clear (parse->priv->adapter);
2505 /* small helper that checks whether we have been trying to resync too long */
2506 static inline GstFlowReturn
2507 gst_base_parse_check_sync (GstBaseParse * parse)
2509 if (G_UNLIKELY (parse->priv->discont &&
2510 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2511 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2512 ("Failed to parse stream"), (NULL));
2513 return GST_FLOW_ERROR;
2519 static GstFlowReturn
2520 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2522 GstBaseParseClass *bclass;
2523 GstBaseParse *parse;
2524 GstFlowReturn ret = GST_FLOW_OK;
2525 GstBuffer *tmpbuf = NULL;
2530 GstClockTime pts, dts;
2532 parse = GST_BASE_PARSE (parent);
2533 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2535 if (parse->priv->detecting) {
2536 GstBuffer *detect_buf;
2538 if (parse->priv->detect_buffers_size == 0) {
2539 detect_buf = gst_buffer_ref (buffer);
2544 detect_buf = gst_buffer_new ();
2546 for (l = parse->priv->detect_buffers; l; l = l->next) {
2547 gsize tmpsize = gst_buffer_get_size (l->data);
2549 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2550 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2554 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2555 offset, gst_buffer_get_size (buffer));
2558 ret = bclass->detect (parse, detect_buf);
2559 gst_buffer_unref (detect_buf);
2561 if (ret == GST_FLOW_OK) {
2564 /* Detected something */
2565 parse->priv->detecting = FALSE;
2567 for (l = parse->priv->detect_buffers; l; l = l->next) {
2568 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2570 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2571 parent, GST_BUFFER_CAST (l->data));
2573 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2575 g_list_free (parse->priv->detect_buffers);
2576 parse->priv->detect_buffers = NULL;
2577 parse->priv->detect_buffers_size = 0;
2579 if (ret != GST_FLOW_OK) {
2583 /* Handle the current buffer */
2584 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2585 /* Still detecting, append buffer or error out if draining */
2587 if (parse->priv->drain) {
2588 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2589 return GST_FLOW_ERROR;
2590 } else if (parse->priv->flushing) {
2591 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2593 g_list_free (parse->priv->detect_buffers);
2594 parse->priv->detect_buffers = NULL;
2595 parse->priv->detect_buffers_size = 0;
2597 parse->priv->detect_buffers =
2598 g_list_append (parse->priv->detect_buffers, buffer);
2599 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2603 /* Something went wrong, subclass responsible for error reporting */
2607 /* And now handle the current buffer if detection worked */
2610 if (G_LIKELY (buffer)) {
2611 GST_LOG_OBJECT (parse,
2612 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2613 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2614 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2615 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2616 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2618 if (G_UNLIKELY (parse->priv->passthrough)) {
2619 GstBaseParseFrame frame;
2621 gst_base_parse_frame_init (&frame);
2622 frame.buffer = gst_buffer_make_writable (buffer);
2623 ret = gst_base_parse_push_frame (parse, &frame);
2624 gst_base_parse_frame_free (&frame);
2627 /* upstream feeding us in reverse playback;
2628 * finish previous fragment and start new upon DISCONT */
2629 if (parse->segment.rate < 0.0) {
2630 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2631 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2632 ret = gst_base_parse_finish_fragment (parse, TRUE);
2633 gst_base_parse_start_fragment (parse);
2636 gst_adapter_push (parse->priv->adapter, buffer);
2639 /* Parse and push as many frames as possible */
2640 /* Stop either when adapter is empty or we are flushing */
2641 while (!parse->priv->flushing) {
2644 /* note: if subclass indicates MAX fsize,
2645 * this will not likely be available anyway ... */
2646 min_size = MAX (parse->priv->min_frame_size, fsize);
2647 av = gst_adapter_available (parse->priv->adapter);
2649 if (G_UNLIKELY (parse->priv->drain)) {
2651 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2652 if (G_UNLIKELY (!min_size)) {
2657 /* Collect at least min_frame_size bytes */
2658 if (av < min_size) {
2659 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2663 /* move along with upstream timestamp (if any),
2664 * but interpolate in between */
2665 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2666 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2667 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts)) {
2668 parse->priv->prev_pts = parse->priv->next_pts = pts;
2669 parse->priv->prev_dts = parse->priv->next_dts = dts;
2672 /* always pass all available data */
2673 data = gst_adapter_map (parse->priv->adapter, av);
2674 /* arrange for actual data to be copied if subclass tries to,
2675 * since what is passed is tied to the adapter */
2676 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2677 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2679 /* keep the adapter mapped, so keep track of what has to be flushed */
2680 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2683 /* probably already implicitly unmapped due to adapter operation,
2684 * but for good measure ... */
2685 gst_adapter_unmap (parse->priv->adapter);
2686 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2689 if (skip == 0 && flush == 0) {
2690 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2691 "breaking to get more data");
2697 GST_LOG_OBJECT (parse, "chain leaving");
2701 /* pull @size bytes at current offset,
2702 * i.e. at least try to and possibly return a shorter buffer if near the end */
2703 static GstFlowReturn
2704 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2705 GstBuffer ** buffer)
2707 GstFlowReturn ret = GST_FLOW_OK;
2709 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2711 /* Caching here actually makes much less difference than one would expect.
2712 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2713 if (parse->priv->cache) {
2714 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2715 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2717 if (cache_offset <= parse->priv->offset &&
2718 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2719 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2720 parse->priv->offset - cache_offset, size);
2721 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2724 /* not enough data in the cache, free cache and get a new one */
2725 gst_buffer_unref (parse->priv->cache);
2726 parse->priv->cache = NULL;
2729 /* refill the cache */
2731 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2732 64 * 1024), &parse->priv->cache);
2733 if (ret != GST_FLOW_OK) {
2734 parse->priv->cache = NULL;
2738 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2740 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2742 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2746 /* Not possible to get enough data, try a last time with
2747 * requesting exactly the size we need */
2748 gst_buffer_unref (parse->priv->cache);
2749 parse->priv->cache = NULL;
2751 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2752 &parse->priv->cache);
2754 if (ret != GST_FLOW_OK) {
2755 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2760 if (gst_buffer_get_size (parse->priv->cache) < size) {
2761 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2762 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2763 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2765 *buffer = parse->priv->cache;
2766 parse->priv->cache = NULL;
2772 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2773 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2778 static GstFlowReturn
2779 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2782 GstClockTime ts = 0;
2786 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2787 ", last_offset = %" G_GINT64_FORMAT,
2788 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
2790 if (!parse->priv->last_offset
2791 || parse->priv->last_pts <= parse->segment.start) {
2792 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2793 GST_TIME_ARGS (parse->segment.start));
2798 /* last fragment started at last_offset / last_ts;
2799 * seek back 10s capped at 1MB */
2800 if (parse->priv->last_pts >= 10 * GST_SECOND)
2801 ts = parse->priv->last_pts - 10 * GST_SECOND;
2802 /* if we are exact now, we will be more so going backwards */
2803 if (parse->priv->exact_position) {
2804 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2806 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
2807 GST_FORMAT_BYTES, &offset)) {
2808 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2811 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2812 parse->priv->last_offset - 1024);
2813 offset = MAX (0, offset);
2815 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2817 parse->priv->offset = offset;
2819 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2821 if (ret != GST_FLOW_OK)
2824 /* offset will increase again as fragment is processed/parsed */
2825 parse->priv->last_offset = offset;
2827 gst_base_parse_start_fragment (parse);
2828 gst_adapter_push (parse->priv->adapter, buffer);
2829 ret = gst_base_parse_finish_fragment (parse, TRUE);
2830 if (ret != GST_FLOW_OK)
2833 /* force previous fragment */
2834 parse->priv->offset = -1;
2841 * pull and scan for next frame starting from current offset
2842 * ajusts sync, drain and offset going along */
2843 static GstFlowReturn
2844 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
2847 GstFlowReturn ret = GST_FLOW_OK;
2848 guint fsize, min_size;
2852 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2853 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2855 /* let's make this efficient for all subclass once and for all;
2856 * maybe it does not need this much, but in the latter case, we know we are
2857 * in pull mode here and might as well try to read and supply more anyway
2858 * (so does the buffer caching mechanism) */
2862 min_size = MAX (parse->priv->min_frame_size, fsize);
2864 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2866 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2867 if (ret != GST_FLOW_OK)
2870 /* if we got a short read, inform subclass we are draining leftover
2871 * and no more is to be expected */
2872 if (gst_buffer_get_size (buffer) < min_size) {
2873 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2874 parse->priv->drain = TRUE;
2877 if (parse->priv->detecting) {
2878 ret = klass->detect (parse, buffer);
2879 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2880 /* If draining we error out, otherwise request a buffer
2882 if (parse->priv->drain) {
2883 gst_buffer_unref (buffer);
2884 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2885 return GST_FLOW_ERROR;
2888 gst_buffer_unref (buffer);
2891 } else if (ret != GST_FLOW_OK) {
2892 gst_buffer_unref (buffer);
2893 GST_ERROR_OBJECT (parse, "detect() returned %s",
2894 gst_flow_get_name (ret));
2898 /* Else handle this buffer normally */
2901 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2902 if (ret != GST_FLOW_OK)
2905 /* something flushed means something happened,
2906 * and we should bail out of this loop so as not to occupy
2907 * the task thread indefinitely */
2909 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2912 /* nothing flushed, no skip and draining, so nothing left to do */
2913 if (!skip && parse->priv->drain) {
2914 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2915 "breaking loop and marking EOS");
2919 /* otherwise, get some more data
2920 * note that is checked this does not happen indefinitely */
2922 GST_LOG_OBJECT (parse, "getting some more data");
2925 parse->priv->drain = FALSE;
2932 /* Loop that is used in pull mode to retrieve data from upstream */
2934 gst_base_parse_loop (GstPad * pad)
2936 GstBaseParse *parse;
2937 GstBaseParseClass *klass;
2938 GstFlowReturn ret = GST_FLOW_OK;
2940 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2941 klass = GST_BASE_PARSE_GET_CLASS (parse);
2943 GST_LOG_OBJECT (parse, "Entering parse loop");
2945 if (G_UNLIKELY (parse->priv->push_stream_start)) {
2949 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
2952 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
2953 gst_pad_push_event (parse->srcpad, gst_event_new_stream_start (stream_id));
2954 parse->priv->push_stream_start = FALSE;
2958 /* reverse playback:
2959 * first fragment (closest to stop time) is handled normally below,
2960 * then we pull in fragments going backwards */
2961 if (parse->segment.rate < 0.0) {
2962 /* check if we jumped back to a previous fragment,
2963 * which is a post-first fragment */
2964 if (parse->priv->offset < 0) {
2965 ret = gst_base_parse_handle_previous_fragment (parse);
2970 ret = gst_base_parse_scan_frame (parse, klass);
2971 if (ret != GST_FLOW_OK)
2974 /* eat expected eos signalling past segment in reverse playback */
2975 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
2976 parse->segment.position >= parse->segment.stop) {
2977 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
2978 /* push what was accumulated during loop run */
2979 gst_base_parse_finish_fragment (parse, FALSE);
2980 /* force previous fragment */
2981 parse->priv->offset = -1;
2986 if (ret == GST_FLOW_EOS)
2988 else if (ret != GST_FLOW_OK)
2991 gst_object_unref (parse);
2998 GST_DEBUG_OBJECT (parse, "eos");
3003 gboolean push_eos = FALSE;
3005 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3006 gst_flow_get_name (ret));
3007 gst_pad_pause_task (parse->sinkpad);
3009 if (ret == GST_FLOW_EOS) {
3010 /* handle end-of-stream/segment */
3011 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3014 if ((stop = parse->segment.stop) == -1)
3015 stop = parse->segment.duration;
3017 GST_DEBUG_OBJECT (parse, "sending segment_done");
3019 gst_element_post_message
3020 (GST_ELEMENT_CAST (parse),
3021 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3022 GST_FORMAT_TIME, stop));
3023 gst_pad_push_event (parse->srcpad,
3024 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3026 /* If we STILL have zero frames processed, fire an error */
3027 if (parse->priv->framecount == 0) {
3028 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3029 ("No valid frames found before end of stream"), (NULL));
3033 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3034 /* for fatal errors we post an error message, wrong-state is
3035 * not fatal because it happens due to flushes and only means
3036 * that we should stop now. */
3037 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3038 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3042 /* Push pending events, including NEWSEGMENT events */
3043 if (G_UNLIKELY (parse->priv->pending_events)) {
3044 GList *r = g_list_reverse (parse->priv->pending_events);
3047 parse->priv->pending_events = NULL;
3048 for (l = r; l != NULL; l = l->next) {
3049 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
3052 parse->priv->pending_segment = FALSE;
3055 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3057 gst_object_unref (parse);
3062 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3064 GstSchedulingFlags sched_flags;
3065 GstBaseParse *parse;
3069 parse = GST_BASE_PARSE (parent);
3071 GST_DEBUG_OBJECT (parse, "sink activate");
3073 query = gst_query_new_scheduling ();
3074 if (!gst_pad_peer_query (sinkpad, query)) {
3075 gst_query_unref (query);
3076 goto baseparse_push;
3079 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3081 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3082 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3084 gst_query_unref (query);
3087 goto baseparse_push;
3089 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3090 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3091 goto baseparse_push;
3093 parse->priv->push_stream_start = TRUE;
3095 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3100 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3101 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3106 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3108 GstBaseParseClass *klass;
3109 gboolean result = TRUE;
3111 GST_DEBUG_OBJECT (parse, "activate %d", active);
3113 klass = GST_BASE_PARSE_GET_CLASS (parse);
3116 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3117 result = klass->start (parse);
3119 /* If the subclass implements ::detect we want to
3120 * call it for the first buffers now */
3121 parse->priv->detecting = (klass->detect != NULL);
3123 /* We must make sure streaming has finished before resetting things
3124 * and calling the ::stop vfunc */
3125 GST_PAD_STREAM_LOCK (parse->sinkpad);
3126 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3128 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3129 result = klass->stop (parse);
3131 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3133 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3138 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3139 GstPadMode mode, gboolean active)
3142 GstBaseParse *parse;
3144 parse = GST_BASE_PARSE (parent);
3146 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3147 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3149 if (!gst_base_parse_activate (parse, active))
3150 goto activate_failed;
3153 case GST_PAD_MODE_PULL:
3155 parse->priv->pending_events =
3156 g_list_prepend (parse->priv->pending_events,
3157 gst_event_new_segment (&parse->segment));
3158 parse->priv->pending_segment = TRUE;
3161 result = gst_pad_stop_task (pad);
3169 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3171 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3178 GST_DEBUG_OBJECT (parse, "activate failed");
3184 * gst_base_parse_set_duration:
3185 * @parse: #GstBaseParse.
3187 * @duration: duration value.
3188 * @interval: how often to update the duration estimate based on bitrate, or 0.
3190 * Sets the duration of the currently playing media. Subclass can use this
3191 * when it is able to determine duration and/or notices a change in the media
3192 * duration. Alternatively, if @interval is non-zero (default), then stream
3193 * duration is determined based on estimated bitrate, and updated every @interval
3197 gst_base_parse_set_duration (GstBaseParse * parse,
3198 GstFormat fmt, gint64 duration, gint interval)
3200 g_return_if_fail (parse != NULL);
3202 if (parse->priv->upstream_has_duration) {
3203 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3207 if (duration != parse->priv->duration) {
3210 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3211 gst_element_post_message (GST_ELEMENT (parse), m);
3213 /* TODO: what about duration tag? */
3215 parse->priv->duration = duration;
3216 parse->priv->duration_fmt = fmt;
3217 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3218 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3219 if (interval != 0) {
3220 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3224 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3225 parse->priv->update_interval = interval;
3231 * gst_base_parse_set_average_bitrate:
3232 * @parse: #GstBaseParse.
3233 * @bitrate: average bitrate in bits/second
3235 * Optionally sets the average bitrate detected in media (if non-zero),
3236 * e.g. based on metadata, as it will be posted to the application.
3238 * By default, announced average bitrate is estimated. The average bitrate
3239 * is used to estimate the total duration of the stream and to estimate
3240 * a seek position, if there's no index and the format is syncable
3241 * (see gst_base_parse_set_syncable()).
3244 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3246 parse->priv->bitrate = bitrate;
3247 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3251 * gst_base_parse_set_min_frame_size:
3252 * @parse: #GstBaseParse.
3253 * @min_size: Minimum size of the data that this base class should give to
3256 * Subclass can use this function to tell the base class that it needs to
3257 * give at least #min_size buffers.
3260 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3262 g_return_if_fail (parse != NULL);
3264 parse->priv->min_frame_size = min_size;
3265 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3269 * gst_base_parse_set_frame_rate:
3270 * @parse: the #GstBaseParse to set
3271 * @fps_num: frames per second (numerator).
3272 * @fps_den: frames per second (denominator).
3273 * @lead_in: frames needed before a segment for subsequent decode
3274 * @lead_out: frames needed after a segment
3276 * If frames per second is configured, parser can take care of buffer duration
3277 * and timestamping. When performing segment clipping, or seeking to a specific
3278 * location, a corresponding decoder might need an initial @lead_in and a
3279 * following @lead_out number of frames to ensure the desired segment is
3280 * entirely filled upon decoding.
3283 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3284 guint fps_den, guint lead_in, guint lead_out)
3286 g_return_if_fail (parse != NULL);
3288 parse->priv->fps_num = fps_num;
3289 parse->priv->fps_den = fps_den;
3290 if (!fps_num || !fps_den) {
3291 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3293 fps_num = fps_den = 0;
3294 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3295 parse->priv->lead_in = parse->priv->lead_out = 0;
3296 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3298 parse->priv->frame_duration =
3299 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3300 parse->priv->lead_in = lead_in;
3301 parse->priv->lead_out = lead_out;
3302 parse->priv->lead_in_ts =
3303 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3304 parse->priv->lead_out_ts =
3305 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3306 /* aim for about 1.5s to estimate duration */
3307 if (parse->priv->update_interval < 0) {
3308 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3309 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3310 parse->priv->update_interval);
3313 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3314 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3315 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3316 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3317 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3318 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3322 * gst_base_parse_set_has_timing_info:
3323 * @parse: a #GstBaseParse
3324 * @has_timing: whether frames carry timing information
3326 * Set if frames carry timing information which the subclass can (generally)
3327 * parse and provide. In particular, intrinsic (rather than estimated) time
3328 * can be obtained following a seek.
3331 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3333 parse->priv->has_timing_info = has_timing;
3334 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3338 * gst_base_parse_set_syncable:
3339 * @parse: a #GstBaseParse
3340 * @syncable: set if frame starts can be identified
3342 * Set if frame starts can be identified. This is set by default and
3343 * determines whether seeking based on bitrate averages
3344 * is possible for a format/stream.
3347 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3349 parse->priv->syncable = syncable;
3350 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3354 * gst_base_parse_set_passthrough:
3355 * @parse: a #GstBaseParse
3356 * @passthrough: %TRUE if parser should run in passthrough mode
3358 * Set if the nature of the format or configuration does not allow (much)
3359 * parsing, and the parser should operate in passthrough mode (which only
3360 * applies when operating in push mode). That is, incoming buffers are
3361 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3362 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3363 * so subclass can perform as much or as little is appropriate for
3364 * passthrough semantics in @pre_push_frame.
3367 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3369 parse->priv->passthrough = passthrough;
3370 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3374 * gst_base_parse_set_pts_interpolation:
3375 * @parse: a #GstBaseParse
3376 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3378 * By default, the base class will guess PTS timestamps using a simple
3379 * interpolation (previous timestamp + duration), which is incorrect for
3380 * data streams with reordering, where PTS can go backward. Sub-classes
3381 * implementing such formats should disable PTS interpolation.
3384 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3385 gboolean pts_interpolate)
3387 parse->priv->pts_interpolate = pts_interpolate;
3388 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3389 (pts_interpolate) ? "yes" : "no");
3393 * gst_base_parse_set_latency:
3394 * @parse: a #GstBaseParse
3395 * @min_latency: minimum parse latency
3396 * @max_latency: maximum parse latency
3398 * Sets the minimum and maximum (which may likely be equal) latency introduced
3399 * by the parsing process. If there is such a latency, which depends on the
3400 * particular parsing of the format, it typically corresponds to 1 frame duration.
3403 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3404 GstClockTime max_latency)
3406 GST_OBJECT_LOCK (parse);
3407 parse->priv->min_latency = min_latency;
3408 parse->priv->max_latency = max_latency;
3409 GST_OBJECT_UNLOCK (parse);
3410 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3411 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3412 GST_TIME_ARGS (max_latency));
3416 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3417 GstClockTime * duration)
3419 gboolean res = FALSE;
3421 g_return_val_if_fail (duration != NULL, FALSE);
3423 *duration = GST_CLOCK_TIME_NONE;
3424 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3425 GST_LOG_OBJECT (parse, "using provided duration");
3426 *duration = parse->priv->duration;
3428 } else if (parse->priv->duration != -1) {
3429 GST_LOG_OBJECT (parse, "converting provided duration");
3430 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3431 parse->priv->duration, format, (gint64 *) duration);
3432 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3433 GST_LOG_OBJECT (parse, "using estimated duration");
3434 *duration = parse->priv->estimated_duration;
3437 GST_LOG_OBJECT (parse, "cannot estimate duration");
3440 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3441 GST_TIME_ARGS (*duration));
3446 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
3448 GstBaseParse *parse;
3449 gboolean res = FALSE;
3451 parse = GST_BASE_PARSE (parent);
3453 GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
3455 switch (GST_QUERY_TYPE (query)) {
3456 case GST_QUERY_POSITION:
3461 GST_DEBUG_OBJECT (parse, "position query");
3462 gst_query_parse_position (query, &format, NULL);
3464 /* try upstream first */
3465 res = gst_pad_query_default (pad, parent, query);
3467 /* Fall back on interpreting segment */
3468 GST_OBJECT_LOCK (parse);
3469 if (format == GST_FORMAT_BYTES) {
3470 dest_value = parse->priv->offset;
3472 } else if (format == parse->segment.format &&
3473 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3474 dest_value = gst_segment_to_stream_time (&parse->segment,
3475 parse->segment.format, parse->segment.position);
3478 GST_OBJECT_UNLOCK (parse);
3480 /* no precise result, upstream no idea either, then best estimate */
3481 /* priv->offset is updated in both PUSH/PULL modes */
3482 res = gst_base_parse_convert (parse,
3483 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3486 gst_query_set_position (query, format, dest_value);
3490 case GST_QUERY_DURATION:
3493 GstClockTime duration;
3495 GST_DEBUG_OBJECT (parse, "duration query");
3496 gst_query_parse_duration (query, &format, NULL);
3498 /* consult upstream */
3499 res = gst_pad_query_default (pad, parent, query);
3501 /* otherwise best estimate from us */
3503 res = gst_base_parse_get_duration (parse, format, &duration);
3505 gst_query_set_duration (query, format, duration);
3509 case GST_QUERY_SEEKING:
3512 GstClockTime duration = GST_CLOCK_TIME_NONE;
3513 gboolean seekable = FALSE;
3515 GST_DEBUG_OBJECT (parse, "seeking query");
3516 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3518 /* consult upstream */
3519 res = gst_pad_query_default (pad, parent, query);
3521 /* we may be able to help if in TIME */
3522 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3523 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3524 /* already OK if upstream takes care */
3525 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3527 if (!(res && seekable)) {
3528 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3529 || duration == -1) {
3530 /* seekable if we still have a chance to get duration later on */
3532 parse->priv->upstream_seekable && parse->priv->update_interval;
3534 seekable = parse->priv->upstream_seekable;
3535 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3538 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3544 case GST_QUERY_FORMATS:
3545 gst_query_set_formatsv (query, 3, fmtlist);
3548 case GST_QUERY_CONVERT:
3550 GstFormat src_format, dest_format;
3551 gint64 src_value, dest_value;
3553 gst_query_parse_convert (query, &src_format, &src_value,
3554 &dest_format, &dest_value);
3556 res = gst_base_parse_convert (parse, src_format, src_value,
3557 dest_format, &dest_value);
3559 gst_query_set_convert (query, src_format, src_value,
3560 dest_format, dest_value);
3564 case GST_QUERY_LATENCY:
3566 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3568 GstClockTime min_latency, max_latency;
3570 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3571 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3572 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3573 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3575 GST_OBJECT_LOCK (parse);
3576 /* add our latency */
3577 if (min_latency != -1)
3578 min_latency += parse->priv->min_latency;
3579 if (max_latency != -1)
3580 max_latency += parse->priv->max_latency;
3581 GST_OBJECT_UNLOCK (parse);
3583 gst_query_set_latency (query, live, min_latency, max_latency);
3588 res = gst_pad_query_default (pad, parent, query);
3594 /* scans for a cluster start from @pos,
3595 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3596 static GstFlowReturn
3597 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3598 GstClockTime * time, GstClockTime * duration)
3600 GstBaseParseClass *klass;
3602 gboolean orig_drain, orig_discont;
3603 GstFlowReturn ret = GST_FLOW_OK;
3604 GstBuffer *buf = NULL;
3605 GstBaseParseFrame *sframe = NULL;
3607 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3608 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3609 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3611 klass = GST_BASE_PARSE_GET_CLASS (parse);
3613 *time = GST_CLOCK_TIME_NONE;
3614 *duration = GST_CLOCK_TIME_NONE;
3617 orig_offset = parse->priv->offset;
3618 orig_discont = parse->priv->discont;
3619 orig_drain = parse->priv->drain;
3621 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3622 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3624 /* jump elsewhere and locate next frame */
3625 parse->priv->offset = *pos;
3626 /* mark as scanning so frames don't get processed all the way */
3627 parse->priv->scanning = TRUE;
3628 ret = gst_base_parse_scan_frame (parse, klass);
3629 parse->priv->scanning = FALSE;
3630 /* retrieve frame found during scan */
3631 sframe = parse->priv->scanned_frame;
3632 parse->priv->scanned_frame = NULL;
3634 if (ret != GST_FLOW_OK || !sframe)
3637 /* get offset first, subclass parsing might dump other stuff in there */
3638 *pos = sframe->offset;
3639 buf = sframe->buffer;
3642 /* but it should provide proper time */
3643 *time = GST_BUFFER_TIMESTAMP (buf);
3644 *duration = GST_BUFFER_DURATION (buf);
3646 GST_LOG_OBJECT (parse,
3647 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3648 GST_TIME_ARGS (*time), *pos);
3652 gst_base_parse_frame_free (sframe);
3655 parse->priv->offset = orig_offset;
3656 parse->priv->discont = orig_discont;
3657 parse->priv->drain = orig_drain;
3662 /* bisect and scan through file for frame starting before @time,
3663 * returns OK and @time/@offset if found, NONE and/or error otherwise
3664 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3665 static GstFlowReturn
3666 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3669 GstFlowReturn ret = GST_FLOW_OK;
3670 gint64 lpos, hpos, newpos;
3671 GstClockTime time, ltime, htime, newtime, dur;
3672 gboolean cont = TRUE;
3673 const GstClockTime tolerance = TARGET_DIFFERENCE;
3674 const guint chunk = 4 * 1024;
3676 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3677 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3679 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3680 GST_TIME_ARGS (*_time));
3682 /* TODO also make keyframe aware if useful some day */
3697 /* do not know at first */
3699 *_time = GST_CLOCK_TIME_NONE;
3701 /* need initial positions; start and end */
3702 lpos = parse->priv->first_frame_offset;
3703 ltime = parse->priv->first_frame_pts;
3704 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3705 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3706 return GST_FLOW_ERROR;
3708 hpos = parse->priv->upstream_size;
3710 GST_DEBUG_OBJECT (parse,
3711 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3712 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3713 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3715 /* check preconditions are satisfied;
3716 * start and end are needed, except for special case where we scan for
3717 * last frame to determine duration */
3718 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3719 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3720 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3724 /* shortcut cases */
3727 } else if (time < ltime + tolerance) {
3731 } else if (time >= htime) {
3737 while (htime > ltime && cont) {
3738 GST_LOG_OBJECT (parse,
3739 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3740 GST_TIME_ARGS (ltime));
3741 GST_LOG_OBJECT (parse,
3742 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3743 GST_TIME_ARGS (htime));
3744 if (G_UNLIKELY (time == G_MAXINT64)) {
3746 } else if (G_LIKELY (hpos > lpos)) {
3748 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3751 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3753 /* we check this case once, but not forever, so break loop */
3758 newpos = CLAMP (newpos, lpos, hpos);
3759 GST_LOG_OBJECT (parse,
3760 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3761 GST_TIME_ARGS (time), newpos);
3763 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3764 if (ret == GST_FLOW_EOS) {
3765 /* heuristic HACK */
3766 hpos = MAX (lpos, hpos - chunk);
3768 } else if (ret != GST_FLOW_OK) {
3772 if (newtime == -1 || newpos == -1) {
3773 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3777 if (G_UNLIKELY (time == G_MAXINT64)) {
3780 if (GST_CLOCK_TIME_IS_VALID (dur))
3783 } else if (newtime > time) {
3785 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3787 } else if (newtime + tolerance > time) {
3788 /* close enough undershoot */
3792 } else if (newtime < ltime) {
3793 /* so a position beyond lpos resulted in earlier time than ltime ... */
3794 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3797 /* undershoot too far */
3798 newpos += newpos == lpos ? chunk : 0;
3799 lpos = CLAMP (newpos, lpos, hpos);
3805 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3806 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3811 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3812 gboolean before, GstClockTime * _ts)
3814 gint64 bytes = 0, ts = 0;
3815 GstIndexEntry *entry = NULL;
3817 if (time == GST_CLOCK_TIME_NONE) {
3823 GST_BASE_PARSE_INDEX_LOCK (parse);
3824 if (parse->priv->index) {
3825 /* Let's check if we have an index entry for that time */
3826 entry = gst_index_get_assoc_entry (parse->priv->index,
3827 parse->priv->index_id,
3828 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3829 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3833 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3834 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3836 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3837 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3838 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3840 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3841 GST_TIME_ARGS (time));
3844 ts = GST_CLOCK_TIME_NONE;
3847 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3856 /* returns TRUE if seek succeeded */
3858 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3863 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
3864 gboolean flush, update, res = TRUE, accurate;
3865 gint64 start, stop, seekpos, seekstop;
3866 GstSegment seeksegment = { 0, };
3867 GstClockTime start_ts;
3869 /* try upstream first, unless we're driving the streaming thread ourselves */
3870 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
3871 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
3876 gst_event_parse_seek (event, &rate, &format, &flags,
3877 &start_type, &start, &stop_type, &stop);
3879 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3880 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3881 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3882 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
3884 /* we can only handle TIME, so check if subclass can convert
3885 * to TIME format if it's some other format (such as DEFAULT) */
3886 if (format != GST_FORMAT_TIME) {
3887 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
3888 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
3890 goto no_convert_to_time;
3892 GST_INFO_OBJECT (parse, "converted %s format to start time "
3893 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
3894 gst_format_get_name (format), GST_TIME_ARGS (start),
3895 GST_TIME_ARGS (stop));
3897 format = GST_FORMAT_TIME;
3900 /* no negative rates in push mode (unless upstream takes care of that, but
3901 * we've already tried upstream and it didn't handle the seek request) */
3902 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3905 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
3906 goto negative_rate_pull_mode;
3908 if (start_type != GST_SEEK_TYPE_SET ||
3909 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3912 /* get flush flag */
3913 flush = flags & GST_SEEK_FLAG_FLUSH;
3915 /* copy segment, we need this because we still need the old
3916 * segment when we close the current segment. */
3917 gst_segment_copy_into (&parse->segment, &seeksegment);
3919 GST_DEBUG_OBJECT (parse, "configuring seek");
3920 gst_segment_do_seek (&seeksegment, rate, format, flags,
3921 start_type, start, stop_type, stop, &update);
3923 /* accurate seeking implies seek tables are used to obtain position,
3924 * and the requested segment is maintained exactly, not adjusted any way */
3925 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3927 /* maybe we can be accurate for (almost) free */
3928 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3929 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3930 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3934 GstClockTime startpos = seeksegment.position;
3936 /* accurate requested, so ... seek a bit before target */
3937 if (startpos < parse->priv->lead_in_ts)
3940 startpos -= parse->priv->lead_in_ts;
3941 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3942 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3945 start_ts = seeksegment.position;
3946 if (!gst_base_parse_convert (parse, format, seeksegment.position,
3947 GST_FORMAT_BYTES, &seekpos))
3948 goto convert_failed;
3949 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
3950 GST_FORMAT_BYTES, &seekstop))
3951 goto convert_failed;
3954 GST_DEBUG_OBJECT (parse,
3955 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3957 GST_DEBUG_OBJECT (parse,
3958 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
3959 seeksegment.stop, seekstop);
3961 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
3964 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
3967 if (parse->srcpad) {
3968 GST_DEBUG_OBJECT (parse, "sending flush start");
3969 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
3970 /* unlock upstream pull_range */
3971 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
3974 gst_pad_pause_task (parse->sinkpad);
3977 /* we should now be able to grab the streaming thread because we stopped it
3978 * with the above flush/pause code */
3979 GST_PAD_STREAM_LOCK (parse->sinkpad);
3981 /* save current position */
3982 last_stop = parse->segment.position;
3983 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
3986 /* now commit to new position */
3988 /* prepare for streaming again */
3990 GST_DEBUG_OBJECT (parse, "sending flush stop");
3991 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
3992 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
3993 gst_base_parse_clear_queues (parse);
3995 /* keep track of our position */
3996 seeksegment.base = gst_segment_to_running_time (&seeksegment,
3997 seeksegment.format, parse->segment.position);
4000 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4002 /* store the newsegment event so it can be sent from the streaming thread. */
4003 /* This will be sent later in _loop() */
4004 parse->priv->pending_segment = TRUE;
4005 parse->priv->pending_events =
4006 g_list_prepend (parse->priv->pending_events,
4007 gst_event_new_segment (&parse->segment));
4009 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4010 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4011 ", time = %" GST_TIME_FORMAT, format,
4012 GST_TIME_ARGS (parse->segment.start),
4013 GST_TIME_ARGS (parse->segment.stop),
4014 GST_TIME_ARGS (parse->segment.time));
4016 /* one last chance in pull mode to stay accurate;
4017 * maybe scan and subclass can find where to go */
4020 GstClockTime ts = seeksegment.position;
4022 gst_base_parse_locate_time (parse, &ts, &scanpos);
4026 /* running collected index now consists of several intervals,
4027 * so optimized check no longer possible */
4028 parse->priv->index_last_valid = FALSE;
4029 parse->priv->index_last_offset = 0;
4030 parse->priv->index_last_ts = 0;
4034 /* mark discont if we are going to stream from another position. */
4035 if (seekpos != parse->priv->offset) {
4036 GST_DEBUG_OBJECT (parse,
4037 "mark DISCONT, we did a seek to another position");
4038 parse->priv->offset = seekpos;
4039 parse->priv->last_offset = seekpos;
4040 parse->priv->seen_keyframe = FALSE;
4041 parse->priv->discont = TRUE;
4042 parse->priv->next_dts = start_ts;
4043 if (parse->priv->pts_interpolate)
4044 parse->priv->next_pts = start_ts;
4045 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4046 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4047 parse->priv->sync_offset = seekpos;
4048 parse->priv->exact_position = accurate;
4051 /* Start streaming thread if paused */
4052 gst_pad_start_task (parse->sinkpad,
4053 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4055 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4060 GstEvent *new_event;
4061 GstBaseParseSeek *seek;
4062 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4064 /* The only thing we need to do in PUSH-mode is to send the
4065 seek event (in bytes) to upstream. Segment / flush handling happens
4066 in corresponding src event handlers */
4067 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4068 if (seekstop >= 0 && seekstop <= seekpos)
4070 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4071 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4073 /* store segment info so its precise details can be reconstructed when
4074 * receiving newsegment;
4075 * this matters for all details when accurate seeking,
4076 * is most useful to preserve NONE stop time otherwise */
4077 seek = g_new0 (GstBaseParseSeek, 1);
4078 seek->segment = seeksegment;
4079 seek->accurate = accurate;
4080 seek->offset = seekpos;
4081 seek->start_ts = start_ts;
4082 GST_OBJECT_LOCK (parse);
4083 /* less optimal, but preserves order */
4084 parse->priv->pending_seeks =
4085 g_slist_append (parse->priv->pending_seeks, seek);
4086 GST_OBJECT_UNLOCK (parse);
4088 res = gst_pad_push_event (parse->sinkpad, new_event);
4091 GST_OBJECT_LOCK (parse);
4092 parse->priv->pending_seeks =
4093 g_slist_remove (parse->priv->pending_seeks, seek);
4094 GST_OBJECT_UNLOCK (parse);
4100 gst_event_unref (event);
4104 negative_rate_pull_mode:
4106 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4112 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4118 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4124 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4125 "couldn't convert that into TIME format", gst_format_get_name (format));
4131 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4137 /* Checks if bitrates are available from upstream tags so that we don't
4138 * override them later
4141 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4143 GstTagList *taglist = NULL;
4146 gst_event_parse_tag (event, &taglist);
4148 /* We only care about stream tags here */
4149 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4152 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4153 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4154 parse->priv->post_min_bitrate = FALSE;
4156 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4157 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4158 parse->priv->post_avg_bitrate = FALSE;
4160 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4161 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4162 parse->priv->post_max_bitrate = FALSE;
4168 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4170 GstBaseParse *parse = GST_BASE_PARSE (element);
4172 GST_BASE_PARSE_INDEX_LOCK (parse);
4173 if (parse->priv->index)
4174 gst_object_unref (parse->priv->index);
4176 parse->priv->index = gst_object_ref (index);
4177 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4178 &parse->priv->index_id);
4179 parse->priv->own_index = FALSE;
4181 parse->priv->index = NULL;
4183 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4187 gst_base_parse_get_index (GstElement * element)
4189 GstBaseParse *parse = GST_BASE_PARSE (element);
4190 GstIndex *result = NULL;
4192 GST_BASE_PARSE_INDEX_LOCK (parse);
4193 if (parse->priv->index)
4194 result = gst_object_ref (parse->priv->index);
4195 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4201 static GstStateChangeReturn
4202 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4204 GstBaseParse *parse;
4205 GstStateChangeReturn result;
4207 parse = GST_BASE_PARSE (element);
4209 switch (transition) {
4210 case GST_STATE_CHANGE_READY_TO_PAUSED:
4211 /* If this is our own index destroy it as the
4212 * old entries might be wrong for the new stream */
4213 GST_BASE_PARSE_INDEX_LOCK (parse);
4214 if (parse->priv->own_index) {
4215 gst_object_unref (parse->priv->index);
4216 parse->priv->index = NULL;
4217 parse->priv->own_index = FALSE;
4220 /* If no index was created, generate one */
4221 if (G_UNLIKELY (!parse->priv->index)) {
4222 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4224 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4225 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4226 &parse->priv->index_id);
4227 parse->priv->own_index = TRUE;
4229 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4235 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4237 switch (transition) {
4238 case GST_STATE_CHANGE_PAUSED_TO_READY:
4239 gst_base_parse_reset (parse);