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 (SEGMENT/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_frame_size() could also be used if a
92 * very 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 overridden) 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
222 #define UPDATE_THRESHOLD 2
224 #define ABSDIFF(a,b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
226 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
227 #define GST_CAT_DEFAULT gst_base_parse_debug
229 /* Supported formats */
230 static const GstFormat fmtlist[] = {
237 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
238 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
240 struct _GstBaseParsePrivate
247 GstFormat duration_fmt;
248 gint64 estimated_duration;
249 gint64 estimated_drift;
251 guint min_frame_size;
252 gboolean disable_passthrough;
253 gboolean passthrough;
254 gboolean pts_interpolate;
257 gboolean has_timing_info;
258 guint fps_num, fps_den;
259 gint update_interval;
261 guint lead_in, lead_out;
262 GstClockTime lead_in_ts, lead_out_ts;
263 GstClockTime min_latency, max_latency;
272 GstClockTime next_pts;
273 GstClockTime next_dts;
274 GstClockTime prev_pts;
275 GstClockTime prev_dts;
276 GstClockTime frame_duration;
277 gboolean seen_keyframe;
283 guint64 data_bytecount;
284 guint64 acc_duration;
285 GstClockTime first_frame_pts;
286 GstClockTime first_frame_dts;
287 gint64 first_frame_offset;
289 gboolean post_min_bitrate;
290 gboolean post_avg_bitrate;
291 gboolean post_max_bitrate;
296 guint posted_avg_bitrate;
298 /* frames/buffers that are queued and ready to go on OK */
299 GQueue queued_frames;
303 /* index entry storage, either ours or provided */
309 /* seek table entries only maintained if upstream is BYTE seekable */
310 gboolean upstream_seekable;
311 gboolean upstream_has_duration;
312 gint64 upstream_size;
313 GstFormat upstream_format;
314 /* minimum distance between two index entries */
315 GstClockTimeDiff idx_interval;
316 guint64 idx_byte_interval;
317 /* ts and offset of last entry added */
318 GstClockTime index_last_ts;
319 gint64 index_last_offset;
320 gboolean index_last_valid;
322 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
323 gboolean exact_position;
324 /* seek events are temporarily kept to match them with newsegments */
325 GSList *pending_seeks;
327 /* reverse playback */
328 GSList *buffers_pending;
329 GSList *buffers_head;
330 GSList *buffers_queued;
331 GSList *buffers_send;
332 GstClockTime last_pts;
333 GstClockTime last_dts;
336 /* Pending serialized events */
337 GList *pending_events;
339 /* If baseparse has checked the caps to identify if it is
340 * handling video or audio */
341 gboolean checked_media;
343 /* offset of last parsed frame/data */
345 /* force a new frame, regardless of offset */
347 /* whether we are merely scanning for a frame */
349 /* ... and resulting frame, if any */
350 GstBaseParseFrame *scanned_frame;
352 /* TRUE if we're still detecting the format, i.e.
353 * if ::detect() is still called for future buffers */
355 GList *detect_buffers;
356 guint detect_buffers_size;
358 /* True when no buffers have been received yet */
359 gboolean first_buffer;
361 /* if TRUE, a STREAM_START event needs to be pushed */
362 gboolean push_stream_start;
364 /* When we need to skip more data than we have currently */
367 /* Tag handling (stream tags only, global tags are passed through as-is) */
368 GstTagList *upstream_tags;
369 GstTagList *parser_tags;
370 GstTagMergeMode parser_tags_merge_mode;
371 gboolean tags_changed;
374 typedef struct _GstBaseParseSeek
379 GstClockTime start_ts;
382 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
387 PROP_DISABLE_PASSTHROUGH,
391 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
392 g_mutex_lock (&parse->priv->index_lock);
393 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
394 g_mutex_unlock (&parse->priv->index_lock);
396 static GstElementClass *parent_class = NULL;
398 static void gst_base_parse_class_init (GstBaseParseClass * klass);
399 static void gst_base_parse_init (GstBaseParse * parse,
400 GstBaseParseClass * klass);
403 gst_base_parse_get_type (void)
405 static volatile gsize base_parse_type = 0;
407 if (g_once_init_enter (&base_parse_type)) {
408 static const GTypeInfo base_parse_info = {
409 sizeof (GstBaseParseClass),
410 (GBaseInitFunc) NULL,
411 (GBaseFinalizeFunc) NULL,
412 (GClassInitFunc) gst_base_parse_class_init,
415 sizeof (GstBaseParse),
417 (GInstanceInitFunc) gst_base_parse_init,
421 _type = g_type_register_static (GST_TYPE_ELEMENT,
422 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
423 g_once_init_leave (&base_parse_type, _type);
425 return (GType) base_parse_type;
428 static void gst_base_parse_finalize (GObject * object);
430 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
431 GstStateChange transition);
432 static void gst_base_parse_reset (GstBaseParse * parse);
435 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
436 static GstIndex *gst_base_parse_get_index (GstElement * element);
439 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
441 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
442 GstObject * parent, GstPadMode mode, gboolean active);
443 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
445 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
446 GstTagList * taglist);
448 static void gst_base_parse_set_property (GObject * object, guint prop_id,
449 const GValue * value, GParamSpec * pspec);
450 static void gst_base_parse_get_property (GObject * object, guint prop_id,
451 GValue * value, GParamSpec * pspec);
453 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
455 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
458 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
460 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
463 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
465 static void gst_base_parse_loop (GstPad * pad);
467 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
468 GstBaseParseFrame * frame);
470 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
473 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
476 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
478 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
481 static void gst_base_parse_drain (GstBaseParse * parse);
483 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
484 GstClockTime time, gboolean before, GstClockTime * _ts);
485 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
486 GstClockTime * _time, gint64 * _offset);
488 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
489 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
491 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
493 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
495 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
497 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
500 gst_base_parse_clear_queues (GstBaseParse * parse)
502 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
503 g_slist_free (parse->priv->buffers_queued);
504 parse->priv->buffers_queued = NULL;
505 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
507 g_slist_free (parse->priv->buffers_pending);
508 parse->priv->buffers_pending = NULL;
509 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
510 g_slist_free (parse->priv->buffers_head);
511 parse->priv->buffers_head = NULL;
512 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
513 g_slist_free (parse->priv->buffers_send);
514 parse->priv->buffers_send = NULL;
516 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
517 g_list_free (parse->priv->detect_buffers);
518 parse->priv->detect_buffers = NULL;
519 parse->priv->detect_buffers_size = 0;
521 g_queue_foreach (&parse->priv->queued_frames,
522 (GFunc) gst_base_parse_frame_free, NULL);
523 g_queue_clear (&parse->priv->queued_frames);
525 gst_buffer_replace (&parse->priv->cache, NULL);
527 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
528 g_list_free (parse->priv->pending_events);
529 parse->priv->pending_events = NULL;
531 parse->priv->checked_media = FALSE;
535 gst_base_parse_finalize (GObject * object)
537 GstBaseParse *parse = GST_BASE_PARSE (object);
539 g_object_unref (parse->priv->adapter);
541 if (parse->priv->index) {
542 gst_object_unref (parse->priv->index);
543 parse->priv->index = NULL;
545 g_mutex_clear (&parse->priv->index_lock);
547 gst_base_parse_clear_queues (parse);
549 G_OBJECT_CLASS (parent_class)->finalize (object);
553 gst_base_parse_class_init (GstBaseParseClass * klass)
555 GObjectClass *gobject_class;
556 GstElementClass *gstelement_class;
558 gobject_class = G_OBJECT_CLASS (klass);
559 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
560 parent_class = g_type_class_peek_parent (klass);
562 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
563 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
564 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
567 * GstBaseParse:disable-passthrough:
569 * If set to %TRUE, baseparse will unconditionally force parsing of the
570 * incoming data. This can be required in the rare cases where the incoming
571 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
572 * force validation and parsing of the incoming data.
573 * If set to %FALSE, decision of whether to parse the data or not is up to
574 * the implementation (standard behaviour).
576 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
577 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
578 "Force processing (disables passthrough)",
579 DEFAULT_DISABLE_PASSTHROUGH,
580 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
582 gstelement_class = (GstElementClass *) klass;
583 gstelement_class->change_state =
584 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
587 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
588 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
591 /* Default handlers */
592 klass->sink_event = gst_base_parse_sink_event_default;
593 klass->src_event = gst_base_parse_src_event_default;
594 klass->sink_query = gst_base_parse_sink_query_default;
595 klass->src_query = gst_base_parse_src_query_default;
596 klass->convert = gst_base_parse_convert_default;
598 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
599 "baseparse element");
603 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
605 GstPadTemplate *pad_template;
607 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
609 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
612 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
613 g_return_if_fail (pad_template != NULL);
614 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
615 gst_pad_set_event_function (parse->sinkpad,
616 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
617 gst_pad_set_query_function (parse->sinkpad,
618 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
619 gst_pad_set_chain_function (parse->sinkpad,
620 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
621 gst_pad_set_activate_function (parse->sinkpad,
622 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
623 gst_pad_set_activatemode_function (parse->sinkpad,
624 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
625 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
626 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
628 GST_DEBUG_OBJECT (parse, "sinkpad created");
631 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
632 g_return_if_fail (pad_template != NULL);
633 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
634 gst_pad_set_event_function (parse->srcpad,
635 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
636 gst_pad_set_query_function (parse->srcpad,
637 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
638 gst_pad_use_fixed_caps (parse->srcpad);
639 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
640 GST_DEBUG_OBJECT (parse, "src created");
642 g_queue_init (&parse->priv->queued_frames);
644 parse->priv->adapter = gst_adapter_new ();
646 parse->priv->pad_mode = GST_PAD_MODE_NONE;
648 g_mutex_init (&parse->priv->index_lock);
651 gst_base_parse_reset (parse);
652 GST_DEBUG_OBJECT (parse, "init ok");
654 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
656 parse->priv->upstream_tags = NULL;
657 parse->priv->parser_tags = NULL;
658 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
662 gst_base_parse_set_property (GObject * object, guint prop_id,
663 const GValue * value, GParamSpec * pspec)
665 GstBaseParse *parse = GST_BASE_PARSE (object);
668 case PROP_DISABLE_PASSTHROUGH:
669 parse->priv->disable_passthrough = g_value_get_boolean (value);
672 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
678 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
681 GstBaseParse *parse = GST_BASE_PARSE (object);
684 case PROP_DISABLE_PASSTHROUGH:
685 g_value_set_boolean (value, parse->priv->disable_passthrough);
688 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
693 static GstBaseParseFrame *
694 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
696 GstBaseParseFrame *copy;
698 copy = g_slice_dup (GstBaseParseFrame, frame);
699 copy->buffer = gst_buffer_ref (frame->buffer);
700 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
702 GST_TRACE ("copied frame %p -> %p", frame, copy);
708 gst_base_parse_frame_free (GstBaseParseFrame * frame)
710 GST_TRACE ("freeing frame %p", frame);
713 gst_buffer_unref (frame->buffer);
714 frame->buffer = NULL;
717 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
718 g_slice_free (GstBaseParseFrame, frame);
720 memset (frame, 0, sizeof (*frame));
724 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
725 (GBoxedCopyFunc) gst_base_parse_frame_copy,
726 (GBoxedFreeFunc) gst_base_parse_frame_free);
729 * gst_base_parse_frame_init:
730 * @frame: #GstBaseParseFrame.
732 * Sets a #GstBaseParseFrame to initial state. Currently this means
733 * all public fields are zero-ed and a private flag is set to make
734 * sure gst_base_parse_frame_free() only frees the contents but not
735 * the actual frame. Use this function to initialise a #GstBaseParseFrame
736 * allocated on the stack.
739 gst_base_parse_frame_init (GstBaseParseFrame * frame)
741 memset (frame, 0, sizeof (GstBaseParseFrame));
742 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
743 GST_TRACE ("inited frame %p", frame);
747 * gst_base_parse_frame_new:
748 * @buffer: (transfer none): a #GstBuffer
750 * @overhead: number of bytes in this frame which should be counted as
751 * metadata overhead, ie. not used to calculate the average bitrate.
752 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
754 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
755 * elements written in C should usually allocate the frame on the stack and
756 * then use gst_base_parse_frame_init() to initialise it.
758 * Returns: a newly-allocated #GstBaseParseFrame. Free with
759 * gst_base_parse_frame_free() when no longer needed.
762 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
765 GstBaseParseFrame *frame;
767 frame = g_slice_new0 (GstBaseParseFrame);
768 frame->buffer = gst_buffer_ref (buffer);
770 GST_TRACE ("created frame %p", frame);
775 gst_base_parse_update_flags (GstBaseParse * parse)
779 /* set flags one by one for clarity */
780 if (G_UNLIKELY (parse->priv->drain))
781 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
783 /* losing sync is pretty much a discont (and vice versa), no ? */
784 if (G_UNLIKELY (parse->priv->discont))
785 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
789 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
791 if (G_UNLIKELY (parse->priv->discont)) {
792 GST_DEBUG_OBJECT (parse, "marking DISCONT");
793 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
796 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
797 GST_LOG_OBJECT (parse, "marking as new frame");
798 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
801 frame->offset = parse->priv->prev_offset = parse->priv->offset;
805 gst_base_parse_reset (GstBaseParse * parse)
807 GST_OBJECT_LOCK (parse);
808 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
809 parse->priv->duration = -1;
810 parse->priv->min_frame_size = 1;
811 parse->priv->discont = TRUE;
812 parse->priv->flushing = FALSE;
813 parse->priv->saw_gaps = FALSE;
814 parse->priv->offset = 0;
815 parse->priv->sync_offset = 0;
816 parse->priv->update_interval = -1;
817 parse->priv->fps_num = parse->priv->fps_den = 0;
818 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
819 parse->priv->lead_in = parse->priv->lead_out = 0;
820 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
821 parse->priv->bitrate = 0;
822 parse->priv->framecount = 0;
823 parse->priv->bytecount = 0;
824 parse->priv->acc_duration = 0;
825 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
826 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
827 parse->priv->first_frame_offset = -1;
828 parse->priv->estimated_duration = -1;
829 parse->priv->estimated_drift = 0;
830 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
831 parse->priv->next_dts = 0;
832 parse->priv->syncable = TRUE;
833 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
834 parse->priv->passthrough = FALSE;
835 parse->priv->pts_interpolate = TRUE;
836 parse->priv->infer_ts = TRUE;
837 parse->priv->has_timing_info = FALSE;
838 parse->priv->min_bitrate = G_MAXUINT;
839 parse->priv->max_bitrate = 0;
840 parse->priv->avg_bitrate = 0;
841 parse->priv->posted_avg_bitrate = 0;
843 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
844 parse->priv->index_last_offset = -1;
845 parse->priv->index_last_valid = TRUE;
846 parse->priv->upstream_seekable = FALSE;
847 parse->priv->upstream_size = 0;
848 parse->priv->upstream_has_duration = FALSE;
849 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
850 parse->priv->idx_interval = 0;
851 parse->priv->idx_byte_interval = 0;
852 parse->priv->exact_position = TRUE;
853 parse->priv->seen_keyframe = FALSE;
854 parse->priv->checked_media = FALSE;
856 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
857 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
858 parse->priv->last_offset = 0;
860 parse->priv->skip = 0;
862 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
864 g_list_free (parse->priv->pending_events);
865 parse->priv->pending_events = NULL;
867 if (parse->priv->cache) {
868 gst_buffer_unref (parse->priv->cache);
869 parse->priv->cache = NULL;
872 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
873 g_slist_free (parse->priv->pending_seeks);
874 parse->priv->pending_seeks = NULL;
876 if (parse->priv->adapter)
877 gst_adapter_clear (parse->priv->adapter);
879 gst_base_parse_set_upstream_tags (parse, NULL);
881 if (parse->priv->parser_tags) {
882 gst_tag_list_unref (parse->priv->parser_tags);
883 parse->priv->parser_tags = NULL;
885 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
887 parse->priv->new_frame = TRUE;
889 parse->priv->first_buffer = TRUE;
891 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
892 g_list_free (parse->priv->detect_buffers);
893 parse->priv->detect_buffers = NULL;
894 parse->priv->detect_buffers_size = 0;
895 GST_OBJECT_UNLOCK (parse);
899 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
901 gboolean got_tag = FALSE;
904 if (parse->priv->upstream_tags != NULL)
905 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
907 if (!got_tag && parse->priv->parser_tags != NULL)
908 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
913 /* check if upstream or subclass tags contain bitrates already */
915 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
917 parse->priv->post_min_bitrate =
918 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
919 parse->priv->post_avg_bitrate =
920 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
921 parse->priv->post_max_bitrate =
922 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
925 /* Queues new tag event with the current combined state of the stream tags
926 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
928 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
930 GstTagList *merged_tags;
932 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
933 parse->priv->upstream_tags);
934 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
935 parse->priv->parser_tags);
936 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
939 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
940 parse->priv->parser_tags_merge_mode);
942 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
944 if (merged_tags == NULL)
947 if (gst_tag_list_is_empty (merged_tags)) {
948 gst_tag_list_unref (merged_tags);
952 /* only add bitrate tags to non-empty taglists for now, and only if neither
953 * upstream tags nor the subclass sets the bitrate tag in question already */
954 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
955 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
956 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MINIMUM_BITRATE,
957 parse->priv->min_bitrate, NULL);
959 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
960 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
961 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MAXIMUM_BITRATE,
962 parse->priv->max_bitrate, NULL);
964 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
965 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
966 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
967 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_BITRATE,
968 parse->priv->avg_bitrate, NULL);
971 parse->priv->pending_events =
972 g_list_prepend (parse->priv->pending_events,
973 gst_event_new_tag (merged_tags));
976 /* gst_base_parse_parse_frame:
977 * @parse: #GstBaseParse.
978 * @buffer: #GstBuffer.
980 * Default callback for parse_frame.
983 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
985 GstBuffer *buffer = frame->buffer;
987 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
988 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
989 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
991 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
992 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
993 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
995 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
996 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
997 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
1002 /* gst_base_parse_convert:
1003 * @parse: #GstBaseParse.
1004 * @src_format: #GstFormat describing the source format.
1005 * @src_value: Source value to be converted.
1006 * @dest_format: #GstFormat defining the converted format.
1007 * @dest_value: Pointer where the conversion result will be put.
1009 * Converts using configured "convert" vmethod in #GstBaseParse class.
1011 * Returns: %TRUE if conversion was successful.
1014 gst_base_parse_convert (GstBaseParse * parse,
1015 GstFormat src_format,
1016 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1018 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1021 g_return_val_if_fail (dest_value != NULL, FALSE);
1023 if (!klass->convert)
1026 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
1028 #ifndef GST_DISABLE_GST_DEBUG
1031 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1032 GST_LOG_OBJECT (parse,
1033 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1034 GST_TIME_ARGS (src_value), *dest_value);
1035 } else if (dest_format == GST_FORMAT_TIME &&
1036 src_format == GST_FORMAT_BYTES) {
1037 GST_LOG_OBJECT (parse,
1038 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1039 src_value, GST_TIME_ARGS (*dest_value));
1041 GST_LOG_OBJECT (parse,
1042 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1043 GST_STR_NULL (gst_format_get_name (src_format)),
1044 GST_STR_NULL (gst_format_get_name (dest_format)),
1045 src_value, *dest_value);
1048 GST_DEBUG_OBJECT (parse, "conversion failed");
1056 /* gst_base_parse_sink_event:
1057 * @pad: #GstPad that received the event.
1058 * @event: #GstEvent to be handled.
1060 * Handler for sink pad events.
1062 * Returns: %TRUE if the event was handled.
1065 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1067 GstBaseParse *parse = GST_BASE_PARSE (parent);
1068 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1071 ret = bclass->sink_event (parse, event);
1077 /* gst_base_parse_sink_event_default:
1078 * @parse: #GstBaseParse.
1079 * @event: #GstEvent to be handled.
1081 * Element-level event handler function.
1083 * The event will be unreffed only if it has been handled and this
1084 * function returns %TRUE
1086 * Returns: %TRUE if the event was handled and not need forwarding.
1089 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1091 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1092 gboolean ret = FALSE;
1093 gboolean forward_immediate = FALSE;
1095 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1096 GST_EVENT_TYPE_NAME (event));
1098 switch (GST_EVENT_TYPE (event)) {
1099 case GST_EVENT_CAPS:
1103 gst_event_parse_caps (event, &caps);
1104 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1106 if (klass->set_sink_caps)
1107 ret = klass->set_sink_caps (parse, caps);
1111 /* will send our own caps downstream */
1112 gst_event_unref (event);
1116 case GST_EVENT_SEGMENT:
1118 const GstSegment *in_segment;
1119 GstSegment out_segment;
1120 gint64 offset = 0, next_dts;
1121 guint32 seqnum = gst_event_get_seqnum (event);
1123 gst_event_parse_segment (event, &in_segment);
1124 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1125 out_segment.rate = in_segment->rate;
1126 out_segment.applied_rate = in_segment->applied_rate;
1128 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1130 parse->priv->upstream_format = in_segment->format;
1131 if (in_segment->format == GST_FORMAT_BYTES) {
1132 GstBaseParseSeek *seek = NULL;
1135 /* stop time is allowed to be open-ended, but not start & pos */
1136 offset = in_segment->time;
1138 GST_OBJECT_LOCK (parse);
1139 for (node = parse->priv->pending_seeks; node; node = node->next) {
1140 GstBaseParseSeek *tmp = node->data;
1142 if (tmp->offset == offset) {
1147 parse->priv->pending_seeks =
1148 g_slist_remove (parse->priv->pending_seeks, seek);
1149 GST_OBJECT_UNLOCK (parse);
1152 GST_DEBUG_OBJECT (parse,
1153 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1154 seek->accurate ? " accurate" : "", &seek->segment);
1156 out_segment.start = seek->segment.start;
1157 out_segment.stop = seek->segment.stop;
1158 out_segment.time = seek->segment.start;
1160 next_dts = seek->start_ts;
1161 parse->priv->exact_position = seek->accurate;
1164 /* best attempt convert */
1165 /* as these are only estimates, stop is kept open-ended to avoid
1166 * premature cutting */
1167 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1168 GST_FORMAT_TIME, (gint64 *) & next_dts);
1170 out_segment.start = next_dts;
1171 out_segment.stop = GST_CLOCK_TIME_NONE;
1172 out_segment.time = next_dts;
1174 parse->priv->exact_position = (in_segment->start == 0);
1177 gst_event_unref (event);
1179 event = gst_event_new_segment (&out_segment);
1180 gst_event_set_seqnum (event, seqnum);
1182 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1183 GST_SEGMENT_FORMAT, in_segment);
1185 } else if (in_segment->format != GST_FORMAT_TIME) {
1186 /* Unknown incoming segment format. Output a default open-ended
1188 gst_event_unref (event);
1190 out_segment.start = 0;
1191 out_segment.stop = GST_CLOCK_TIME_NONE;
1192 out_segment.time = 0;
1194 event = gst_event_new_segment (&out_segment);
1195 gst_event_set_seqnum (event, seqnum);
1199 /* not considered BYTE seekable if it is talking to us in TIME,
1200 * whatever else it might claim */
1201 parse->priv->upstream_seekable = FALSE;
1202 next_dts = in_segment->start;
1203 gst_event_copy_segment (event, &out_segment);
1206 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1209 gst_segment_set_newsegment (&parse->segment, update, rate,
1210 applied_rate, format, start, stop, start);
1215 /* save the segment for later, right before we push a new buffer so that
1216 * the caps are fixed and the next linked element can receive
1217 * the segment but finish the current segment */
1218 GST_DEBUG_OBJECT (parse, "draining current segment");
1219 if (in_segment->rate > 0.0)
1220 gst_base_parse_drain (parse);
1222 gst_base_parse_finish_fragment (parse, FALSE);
1223 gst_adapter_clear (parse->priv->adapter);
1225 parse->priv->offset = offset;
1226 parse->priv->sync_offset = offset;
1227 parse->priv->next_dts = next_dts;
1228 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1229 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1230 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1231 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1232 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1233 parse->priv->discont = TRUE;
1234 parse->priv->seen_keyframe = FALSE;
1235 parse->priv->skip = 0;
1239 case GST_EVENT_SEGMENT_DONE:
1240 /* need to drain now, rather than upon a new segment,
1241 * since that would have SEGMENT_DONE come before potential
1242 * delayed last part of the current segment */
1243 GST_DEBUG_OBJECT (parse, "draining current segment");
1244 if (parse->segment.rate > 0.0)
1245 gst_base_parse_drain (parse);
1247 gst_base_parse_finish_fragment (parse, FALSE);
1248 /* Also forward event immediately, there might be no new data
1249 * coming afterwards that would allow us to forward it later */
1250 forward_immediate = TRUE;
1253 case GST_EVENT_FLUSH_START:
1254 GST_OBJECT_LOCK (parse);
1255 parse->priv->flushing = TRUE;
1256 GST_OBJECT_UNLOCK (parse);
1259 case GST_EVENT_FLUSH_STOP:
1260 gst_adapter_clear (parse->priv->adapter);
1261 gst_base_parse_clear_queues (parse);
1262 parse->priv->flushing = FALSE;
1263 parse->priv->discont = TRUE;
1264 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1265 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1266 parse->priv->new_frame = TRUE;
1267 parse->priv->skip = 0;
1269 forward_immediate = TRUE;
1273 if (parse->segment.rate > 0.0)
1274 gst_base_parse_drain (parse);
1276 gst_base_parse_finish_fragment (parse, TRUE);
1278 /* If we STILL have zero frames processed, fire an error */
1279 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1280 !parse->priv->first_buffer) {
1281 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1282 ("No valid frames found before end of stream"), (NULL));
1285 if (!parse->priv->saw_gaps
1286 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1287 /* We've not posted bitrate tags yet - do so now */
1288 gst_base_parse_queue_tag_event_update (parse);
1291 /* newsegment and other serialized events before eos */
1292 gst_base_parse_push_pending_events (parse);
1294 forward_immediate = TRUE;
1296 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1297 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1298 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1299 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1302 const GstStructure *s;
1303 gboolean ev_still_state;
1305 s = gst_event_get_structure (event);
1307 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1308 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1309 if (ev_still_state) {
1310 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1311 if (parse->segment.rate > 0.0)
1312 gst_base_parse_drain (parse);
1314 gst_base_parse_finish_fragment (parse, TRUE);
1316 forward_immediate = TRUE;
1322 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1324 gst_base_parse_push_pending_events (parse);
1326 if (parse->segment.rate > 0.0)
1327 gst_base_parse_drain (parse);
1329 gst_base_parse_finish_fragment (parse, TRUE);
1330 forward_immediate = TRUE;
1331 parse->priv->saw_gaps = TRUE;
1336 GstTagList *tags = NULL;
1338 gst_event_parse_tag (event, &tags);
1340 /* We only care about stream tags here, global tags we just forward */
1341 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1344 gst_base_parse_set_upstream_tags (parse, tags);
1345 gst_base_parse_queue_tag_event_update (parse);
1346 parse->priv->tags_changed = FALSE;
1347 gst_event_unref (event);
1352 case GST_EVENT_STREAM_START:
1354 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1355 forward_immediate = TRUE;
1357 gst_base_parse_set_upstream_tags (parse, NULL);
1358 parse->priv->tags_changed = TRUE;
1365 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1366 * For EOS this is required because no buffer or serialized event
1367 * will come after EOS and nothing could trigger another
1368 * _finish_frame() call. *
1369 * If the subclass handles sending of EOS manually it can return
1370 * _DROPPED from ::finish() and all other subclasses should have
1371 * decoded/flushed all remaining data before this
1373 * For FLUSH_STOP this is required because it is expected
1374 * to be forwarded immediately and no buffers are queued anyway.
1377 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1378 ret = gst_pad_push_event (parse->srcpad, event);
1380 parse->priv->pending_events =
1381 g_list_prepend (parse->priv->pending_events, event);
1386 GST_DEBUG_OBJECT (parse, "event handled");
1392 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1397 pad = GST_BASE_PARSE_SINK_PAD (parse);
1399 switch (GST_QUERY_TYPE (query)) {
1400 case GST_QUERY_CAPS:
1402 GstBaseParseClass *bclass;
1404 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1406 if (bclass->get_sink_caps) {
1407 GstCaps *caps, *filter;
1409 gst_query_parse_caps (query, &filter);
1410 caps = bclass->get_sink_caps (parse, filter);
1411 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1413 gst_query_set_caps_result (query, caps);
1414 gst_caps_unref (caps);
1418 GstCaps *caps, *template_caps, *filter;
1420 gst_query_parse_caps (query, &filter);
1421 template_caps = gst_pad_get_pad_template_caps (pad);
1422 if (filter != NULL) {
1424 gst_caps_intersect_full (filter, template_caps,
1425 GST_CAPS_INTERSECT_FIRST);
1426 gst_caps_unref (template_caps);
1428 caps = template_caps;
1430 gst_query_set_caps_result (query, caps);
1431 gst_caps_unref (caps);
1439 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1448 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1450 GstBaseParseClass *bclass;
1451 GstBaseParse *parse;
1454 parse = GST_BASE_PARSE (parent);
1455 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1457 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1459 if (bclass->sink_query)
1460 ret = bclass->sink_query (parse, query);
1464 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1465 GST_QUERY_TYPE_NAME (query), ret, query);
1471 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1473 GstBaseParseClass *bclass;
1474 GstBaseParse *parse;
1477 parse = GST_BASE_PARSE (parent);
1478 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1480 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1481 GST_QUERY_TYPE_NAME (query), query);
1483 if (bclass->src_query)
1484 ret = bclass->src_query (parse, query);
1488 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1489 GST_QUERY_TYPE_NAME (query), ret, query);
1494 /* gst_base_parse_src_event:
1495 * @pad: #GstPad that received the event.
1496 * @event: #GstEvent that was received.
1498 * Handler for source pad events.
1500 * Returns: %TRUE if the event was handled.
1503 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1505 GstBaseParse *parse;
1506 GstBaseParseClass *bclass;
1507 gboolean ret = TRUE;
1509 parse = GST_BASE_PARSE (parent);
1510 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1512 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1513 GST_EVENT_TYPE_NAME (event));
1515 if (bclass->src_event)
1516 ret = bclass->src_event (parse, event);
1518 gst_event_unref (event);
1524 gst_base_parse_is_seekable (GstBaseParse * parse)
1526 /* FIXME: could do more here, e.g. check index or just send data from 0
1527 * in pull mode and let decoder/sink clip */
1528 return parse->priv->syncable;
1531 /* gst_base_parse_src_event_default:
1532 * @parse: #GstBaseParse.
1533 * @event: #GstEvent that was received.
1535 * Default srcpad event handler.
1537 * Returns: %TRUE if the event was handled and can be dropped.
1540 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1542 gboolean res = FALSE;
1544 switch (GST_EVENT_TYPE (event)) {
1545 case GST_EVENT_SEEK:
1546 if (gst_base_parse_is_seekable (parse))
1547 res = gst_base_parse_handle_seek (parse, event);
1550 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1559 * gst_base_parse_convert_default:
1560 * @parse: #GstBaseParse.
1561 * @src_format: #GstFormat describing the source format.
1562 * @src_value: Source value to be converted.
1563 * @dest_format: #GstFormat defining the converted format.
1564 * @dest_value: Pointer where the conversion result will be put.
1566 * Default implementation of "convert" vmethod in #GstBaseParse class.
1568 * Returns: %TRUE if conversion was successful.
1571 gst_base_parse_convert_default (GstBaseParse * parse,
1572 GstFormat src_format,
1573 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1575 gboolean ret = FALSE;
1576 guint64 bytes, duration;
1578 if (G_UNLIKELY (src_format == dest_format)) {
1579 *dest_value = src_value;
1583 if (G_UNLIKELY (src_value == -1)) {
1588 if (G_UNLIKELY (src_value == 0)) {
1593 /* need at least some frames */
1594 if (!parse->priv->framecount)
1597 duration = parse->priv->acc_duration / GST_MSECOND;
1598 bytes = parse->priv->bytecount;
1600 if (G_UNLIKELY (!duration || !bytes))
1601 goto no_duration_bytes;
1603 if (src_format == GST_FORMAT_BYTES) {
1604 if (dest_format == GST_FORMAT_TIME) {
1605 /* BYTES -> TIME conversion */
1606 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1607 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1608 *dest_value *= GST_MSECOND;
1609 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1610 *dest_value / GST_MSECOND);
1613 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1615 } else if (src_format == GST_FORMAT_TIME) {
1616 if (dest_format == GST_FORMAT_BYTES) {
1617 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1618 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1620 GST_DEBUG_OBJECT (parse,
1621 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1622 src_value / GST_MSECOND, *dest_value);
1625 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1627 } else if (src_format == GST_FORMAT_DEFAULT) {
1628 /* DEFAULT == frame-based */
1629 if (dest_format == GST_FORMAT_TIME) {
1630 GST_DEBUG_OBJECT (parse, "converting default -> time");
1631 if (parse->priv->fps_den) {
1632 *dest_value = gst_util_uint64_scale (src_value,
1633 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1637 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1640 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1647 GST_DEBUG_OBJECT (parse, "no framecount");
1652 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1653 G_GUINT64_FORMAT, duration, bytes);
1660 gst_base_parse_update_duration (GstBaseParse * parse)
1662 gint64 ptot, dest_value;
1664 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1667 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1668 GST_FORMAT_TIME, &dest_value))
1671 /* inform if duration changed, but try to avoid spamming */
1672 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1674 parse->priv->estimated_duration = dest_value;
1675 GST_LOG_OBJECT (parse,
1676 "updated estimated duration to %" GST_TIME_FORMAT,
1677 GST_TIME_ARGS (dest_value));
1679 if (parse->priv->estimated_drift > GST_SECOND ||
1680 parse->priv->estimated_drift < -GST_SECOND) {
1681 gst_element_post_message (GST_ELEMENT (parse),
1682 gst_message_new_duration_changed (GST_OBJECT (parse)));
1683 parse->priv->estimated_drift = 0;
1687 /* gst_base_parse_update_bitrates:
1688 * @parse: #GstBaseParse.
1689 * @buffer: Current frame as a #GstBuffer
1691 * Keeps track of the minimum and maximum bitrates, and also maintains a
1692 * running average bitrate of the stream so far.
1695 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1697 guint64 data_len, frame_dur;
1698 gint overhead, frame_bitrate;
1699 GstBuffer *buffer = frame->buffer;
1701 overhead = frame->overhead;
1705 data_len = gst_buffer_get_size (buffer) - overhead;
1706 parse->priv->data_bytecount += data_len;
1708 /* duration should be valid by now,
1709 * either set by subclass or maybe based on fps settings */
1710 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1711 /* Calculate duration of a frame from buffer properties */
1712 frame_dur = GST_BUFFER_DURATION (buffer);
1713 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1714 parse->priv->acc_duration;
1717 /* No way to figure out frame duration (is this even possible?) */
1721 /* override if subclass provided bitrate, e.g. metadata based */
1722 if (parse->priv->bitrate) {
1723 parse->priv->avg_bitrate = parse->priv->bitrate;
1724 /* spread this (confirmed) info ASAP */
1725 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1726 parse->priv->tags_changed = TRUE;
1730 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1734 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1735 parse->priv->avg_bitrate);
1737 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1740 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1741 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1742 || parse->priv->post_max_bitrate))
1743 parse->priv->tags_changed = TRUE;
1745 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1746 if (frame_bitrate < parse->priv->min_bitrate) {
1747 parse->priv->min_bitrate = frame_bitrate;
1748 if (parse->priv->post_min_bitrate)
1749 parse->priv->tags_changed = TRUE;
1752 if (frame_bitrate > parse->priv->max_bitrate) {
1753 parse->priv->max_bitrate = frame_bitrate;
1754 if (parse->priv->post_max_bitrate)
1755 parse->priv->tags_changed = TRUE;
1758 /* Only update the tag on a 2% change */
1759 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1760 guint64 diffprev = gst_util_uint64_scale_int (100,
1761 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1762 parse->priv->avg_bitrate);
1763 if (diffprev >= UPDATE_THRESHOLD)
1764 parse->priv->tags_changed = TRUE;
1770 * gst_base_parse_add_index_entry:
1771 * @parse: #GstBaseParse.
1772 * @offset: offset of entry
1773 * @ts: timestamp associated with offset
1774 * @key: whether entry refers to keyframe
1775 * @force: add entry disregarding sanity checks
1777 * Adds an entry to the index associating @offset to @ts. It is recommended
1778 * to only add keyframe entries. @force allows to bypass checks, such as
1779 * whether the stream is (upstream) seekable, another entry is already "close"
1780 * to the new entry, etc.
1782 * Returns: #gboolean indicating whether entry was added
1785 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1786 GstClockTime ts, gboolean key, gboolean force)
1788 gboolean ret = FALSE;
1789 GstIndexAssociation associations[2];
1791 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1792 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1794 if (G_LIKELY (!force)) {
1796 if (!parse->priv->upstream_seekable) {
1797 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1801 /* FIXME need better helper data structure that handles these issues
1802 * related to ongoing collecting of index entries */
1803 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1805 GST_LOG_OBJECT (parse,
1806 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1807 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1811 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1812 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1813 parse->priv->idx_interval) {
1814 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1815 GST_TIME_ARGS (parse->priv->index_last_ts));
1819 /* if last is not really the last one */
1820 if (!parse->priv->index_last_valid) {
1821 GstClockTime prev_ts;
1823 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1824 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1825 GST_LOG_OBJECT (parse,
1826 "entry too close to existing entry %" GST_TIME_FORMAT,
1827 GST_TIME_ARGS (prev_ts));
1828 parse->priv->index_last_offset = offset;
1829 parse->priv->index_last_ts = ts;
1835 associations[0].format = GST_FORMAT_TIME;
1836 associations[0].value = ts;
1837 associations[1].format = GST_FORMAT_BYTES;
1838 associations[1].value = offset;
1840 /* index might change on-the-fly, although that would be nutty app ... */
1841 GST_BASE_PARSE_INDEX_LOCK (parse);
1842 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1843 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1844 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1845 (const GstIndexAssociation *) &associations);
1846 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1849 parse->priv->index_last_offset = offset;
1850 parse->priv->index_last_ts = ts;
1859 /* check for seekable upstream, above and beyond a mere query */
1861 gst_base_parse_check_seekability (GstBaseParse * parse)
1864 gboolean seekable = FALSE;
1865 gint64 start = -1, stop = -1;
1866 guint idx_interval = 0;
1867 guint64 idx_byte_interval = 0;
1869 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1870 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1871 GST_DEBUG_OBJECT (parse, "seeking query failed");
1875 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1877 /* try harder to query upstream size if we didn't get it the first time */
1878 if (seekable && stop == -1) {
1879 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1880 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1883 /* if upstream doesn't know the size, it's likely that it's not seekable in
1884 * practice even if it technically may be seekable */
1885 if (seekable && (start != 0 || stop <= start)) {
1886 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1890 /* let's not put every single frame into our index */
1892 if (stop < 10 * 1024 * 1024)
1894 else if (stop < 100 * 1024 * 1024)
1897 idx_interval = 1000;
1899 /* ensure that even for large files (e.g. very long audio files), the index
1900 * stays reasonably-size, with some arbitrary limit to the total number of
1902 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1903 GST_DEBUG_OBJECT (parse,
1904 "Limiting index entries to %d, indexing byte interval %"
1905 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1909 gst_query_unref (query);
1911 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1912 G_GUINT64_FORMAT ")", seekable, start, stop);
1913 parse->priv->upstream_seekable = seekable;
1914 parse->priv->upstream_size = seekable ? stop : 0;
1916 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1917 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1918 parse->priv->idx_byte_interval = idx_byte_interval;
1921 /* some misc checks on upstream */
1923 gst_base_parse_check_upstream (GstBaseParse * parse)
1927 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1928 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1929 /* upstream has one, accept it also, and no further updates */
1930 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1931 parse->priv->upstream_has_duration = TRUE;
1934 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1935 parse->priv->upstream_has_duration);
1938 /* checks src caps to determine if dealing with audio or video */
1939 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1941 gst_base_parse_check_media (GstBaseParse * parse)
1946 caps = gst_pad_get_current_caps (parse->srcpad);
1947 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1948 parse->priv->is_video =
1949 g_str_has_prefix (gst_structure_get_name (s), "video");
1951 /* historical default */
1952 parse->priv->is_video = FALSE;
1955 gst_caps_unref (caps);
1957 parse->priv->checked_media = TRUE;
1958 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1961 /* takes ownership of frame */
1963 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1965 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1966 /* frame allocated on the heap, we can just take ownership */
1967 g_queue_push_tail (&parse->priv->queued_frames, frame);
1968 GST_TRACE ("queued frame %p", frame);
1970 GstBaseParseFrame *copy;
1972 /* probably allocated on the stack, must make a proper copy */
1973 copy = gst_base_parse_frame_copy (frame);
1974 g_queue_push_tail (&parse->priv->queued_frames, copy);
1975 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1976 gst_base_parse_frame_free (frame);
1980 /* makes sure that @buf is properly prepared and decorated for passing
1981 * to baseclass, and an equally setup frame is returned setup with @buf.
1982 * Takes ownership of @buf. */
1983 static GstBaseParseFrame *
1984 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1986 GstBaseParseFrame *frame = NULL;
1988 buffer = gst_buffer_make_writable (buffer);
1990 GST_LOG_OBJECT (parse,
1991 "preparing frame at offset %" G_GUINT64_FORMAT
1992 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1993 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1994 gst_buffer_get_size (buffer));
1996 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1998 gst_base_parse_update_flags (parse);
2000 frame = gst_base_parse_frame_new (buffer, 0, 0);
2001 gst_buffer_unref (buffer);
2002 gst_base_parse_update_frame (parse, frame);
2004 /* clear flags for next frame */
2005 parse->priv->discont = FALSE;
2006 parse->priv->new_frame = FALSE;
2008 /* use default handler to provide initial (upstream) metadata */
2009 gst_base_parse_parse_frame (parse, frame);
2014 /* Wraps buffer in a frame and dispatches to subclass.
2015 * Also manages data skipping and offset handling (including adapter flushing).
2016 * Takes ownership of @buffer */
2017 static GstFlowReturn
2018 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2019 gint * skip, gint * flushed)
2021 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2022 GstBaseParseFrame *frame;
2025 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2027 GST_LOG_OBJECT (parse,
2028 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2029 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2030 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2031 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2032 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2034 /* track what is being flushed during this single round of frame processing */
2035 parse->priv->flushed = 0;
2038 /* make it easy for _finish_frame to pick up input data */
2039 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2040 gst_buffer_ref (buffer);
2041 gst_adapter_push (parse->priv->adapter, buffer);
2044 frame = gst_base_parse_prepare_frame (parse, buffer);
2045 ret = klass->handle_frame (parse, frame, skip);
2047 *flushed = parse->priv->flushed;
2049 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2052 /* subclass can only do one of these, or semantics are too unclear */
2053 g_assert (*skip == 0 || *flushed == 0);
2055 /* track skipping */
2057 GstClockTime pts, dts;
2060 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2061 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2062 /* reverse playback, and no frames found yet, so we are skipping
2063 * the leading part of a fragment, which may form the tail of
2064 * fragment coming later, hopefully subclass skips efficiently ... */
2065 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2066 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2067 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2068 outbuf = gst_buffer_make_writable (outbuf);
2069 GST_BUFFER_PTS (outbuf) = pts;
2070 GST_BUFFER_DTS (outbuf) = dts;
2071 parse->priv->buffers_head =
2072 g_slist_prepend (parse->priv->buffers_head, outbuf);
2075 /* If we're asked to skip more than is available in the adapter,
2076 we need to remember what we need to skip for next iteration */
2077 gsize av = gst_adapter_available (parse->priv->adapter);
2078 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2080 gst_adapter_flush (parse->priv->adapter, *skip);
2083 ("This is more than available, flushing %" G_GSIZE_FORMAT
2084 ", storing %u to skip", av, (guint) (*skip - av));
2085 parse->priv->skip = *skip - av;
2086 gst_adapter_flush (parse->priv->adapter, av);
2090 if (!parse->priv->discont)
2091 parse->priv->sync_offset = parse->priv->offset;
2092 parse->priv->offset += *skip;
2093 parse->priv->discont = TRUE;
2094 /* check for indefinite skipping */
2095 if (ret == GST_FLOW_OK)
2096 ret = gst_base_parse_check_sync (parse);
2099 parse->priv->offset += *flushed;
2101 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2102 gst_adapter_clear (parse->priv->adapter);
2105 gst_base_parse_frame_free (frame);
2110 /* gst_base_parse_push_pending_events:
2111 * @parse: #GstBaseParse
2113 * Pushes the pending events
2116 gst_base_parse_push_pending_events (GstBaseParse * parse)
2118 if (G_UNLIKELY (parse->priv->pending_events)) {
2119 GList *r = g_list_reverse (parse->priv->pending_events);
2122 parse->priv->pending_events = NULL;
2123 for (l = r; l != NULL; l = l->next) {
2124 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2130 /* gst_base_parse_handle_and_push_frame:
2131 * @parse: #GstBaseParse.
2132 * @klass: #GstBaseParseClass.
2133 * @frame: (transfer full): a #GstBaseParseFrame
2135 * Parses the frame from given buffer and pushes it forward. Also performs
2136 * timestamp handling and checks the segment limits.
2138 * This is called with srcpad STREAM_LOCK held.
2140 * Returns: #GstFlowReturn
2142 static GstFlowReturn
2143 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2144 GstBaseParseFrame * frame)
2149 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2151 buffer = frame->buffer;
2152 offset = frame->offset;
2154 /* check if subclass/format can provide ts.
2155 * If so, that allows and enables extra seek and duration determining options */
2156 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2157 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2158 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2159 parse->priv->first_frame_offset = offset;
2160 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2161 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2162 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2163 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2164 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2165 GST_TIME_ARGS (parse->priv->first_frame_pts),
2166 parse->priv->first_frame_offset);
2167 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2169 GstClockTime last_ts = G_MAXINT64;
2171 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2172 gst_base_parse_locate_time (parse, &last_ts, &off);
2173 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2174 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2177 /* disable further checks */
2178 parse->priv->first_frame_offset = 0;
2182 /* track upstream time if provided, not subclass' internal notion of it */
2183 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2184 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2185 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2188 /* interpolating and no valid pts yet,
2189 * start with dts and carry on from there */
2190 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2191 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2192 parse->priv->next_pts = parse->priv->next_dts;
2194 /* again use default handler to add missing metadata;
2195 * we may have new information on frame properties */
2196 gst_base_parse_parse_frame (parse, frame);
2198 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2199 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2200 parse->priv->next_dts =
2201 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2202 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2203 GstClockTime next_pts =
2204 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2205 if (next_pts >= parse->priv->next_dts)
2206 parse->priv->next_pts = next_pts;
2209 /* we lost track, do not produce bogus time next time around
2210 * (probably means parser subclass has given up on parsing as well) */
2211 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2212 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2215 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2216 GST_BUFFER_PTS_IS_VALID (buffer))
2217 gst_base_parse_add_index_entry (parse, offset,
2218 GST_BUFFER_PTS (buffer),
2219 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2221 /* All OK, push queued frames if there are any */
2222 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2223 GstBaseParseFrame *queued_frame;
2225 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2226 gst_base_parse_push_frame (parse, queued_frame);
2227 gst_base_parse_frame_free (queued_frame);
2231 return gst_base_parse_push_frame (parse, frame);
2235 * gst_base_parse_push_frame:
2236 * @parse: #GstBaseParse.
2237 * @frame: (transfer none): a #GstBaseParseFrame
2239 * Pushes the frame's buffer downstream, sends any pending events and
2240 * does some timestamp and segment handling. Takes ownership of
2241 * frame's buffer, though caller retains ownership of @frame.
2243 * This must be called with sinkpad STREAM_LOCK held.
2245 * Returns: #GstFlowReturn
2248 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2250 GstFlowReturn ret = GST_FLOW_OK;
2251 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2252 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2253 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2257 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2258 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2260 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2262 buffer = frame->buffer;
2264 GST_LOG_OBJECT (parse,
2265 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2266 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2267 gst_buffer_get_size (buffer),
2268 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2269 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2270 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2273 parse->priv->bytecount += frame->size;
2274 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2275 parse->priv->framecount++;
2276 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2277 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2280 /* 0 means disabled */
2281 if (parse->priv->update_interval < 0)
2282 parse->priv->update_interval = 50;
2283 else if (parse->priv->update_interval > 0 &&
2284 (parse->priv->framecount % parse->priv->update_interval) == 0)
2285 gst_base_parse_update_duration (parse);
2287 if (GST_BUFFER_PTS_IS_VALID (buffer))
2288 last_start = last_stop = GST_BUFFER_PTS (buffer);
2289 if (last_start != GST_CLOCK_TIME_NONE
2290 && GST_BUFFER_DURATION_IS_VALID (buffer))
2291 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2293 /* should have caps by now */
2294 if (!gst_pad_has_current_caps (parse->srcpad))
2297 if (G_UNLIKELY (!parse->priv->checked_media)) {
2298 /* have caps; check identity */
2299 gst_base_parse_check_media (parse);
2302 if (parse->priv->tags_changed) {
2303 gst_base_parse_queue_tag_event_update (parse);
2304 parse->priv->tags_changed = FALSE;
2307 /* Push pending events, including SEGMENT events */
2308 gst_base_parse_push_pending_events (parse);
2310 /* segment adjustment magic; only if we are running the whole show */
2311 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2312 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2313 parse->priv->upstream_seekable)) {
2315 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2316 GST_CLOCK_TIME_IS_VALID (last_start)) {
2317 GstClockTimeDiff diff;
2319 /* only send newsegments with increasing start times,
2320 * otherwise if these go back and forth downstream (sinks) increase
2321 * accumulated time and running_time */
2322 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2323 if (G_UNLIKELY (diff > 2 * GST_SECOND
2324 && last_start > parse->segment.start
2325 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2326 || last_start < parse->segment.stop))) {
2328 GST_DEBUG_OBJECT (parse,
2329 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2330 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2331 "Sending updated SEGMENT events", diff,
2332 GST_TIME_ARGS (parse->segment.position),
2333 GST_TIME_ARGS (last_start));
2335 /* skip gap FIXME */
2336 gst_pad_push_event (parse->srcpad,
2337 gst_event_new_segment (&parse->segment));
2339 parse->segment.position = last_start;
2344 /* update bitrates and optionally post corresponding tags
2345 * (following newsegment) */
2346 gst_base_parse_update_bitrates (parse, frame);
2348 if (klass->pre_push_frame) {
2349 ret = klass->pre_push_frame (parse, frame);
2351 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2354 /* take final ownership of frame buffer */
2355 if (frame->out_buffer) {
2356 buffer = frame->out_buffer;
2357 frame->out_buffer = NULL;
2358 gst_buffer_replace (&frame->buffer, NULL);
2360 buffer = frame->buffer;
2361 frame->buffer = NULL;
2364 /* subclass must play nice */
2365 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2367 size = gst_buffer_get_size (buffer);
2369 parse->priv->seen_keyframe |= parse->priv->is_video &&
2370 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2372 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2373 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2374 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2375 GST_BUFFER_TIMESTAMP (buffer) >
2376 parse->segment.stop + parse->priv->lead_out_ts) {
2377 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2379 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2380 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2381 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2382 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2383 parse->priv->lead_in_ts < parse->segment.start) {
2384 if (parse->priv->seen_keyframe) {
2385 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2388 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2389 ret = GST_BASE_PARSE_FLOW_DROPPED;
2396 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2397 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2398 gst_buffer_unref (buffer);
2400 } else if (ret == GST_FLOW_OK) {
2401 if (parse->segment.rate > 0.0) {
2402 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2404 ret = gst_pad_push (parse->srcpad, buffer);
2405 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2406 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2408 /* in backwards playback mode, if on passthrough we need to push buffers
2409 * directly without accumulating them into the buffers_queued as baseparse
2410 * will never check for a DISCONT while on passthrough and those buffers
2411 * will never be pushed.
2413 * also, as we are on reverse playback, it might be possible that
2414 * passthrough might have just been enabled, so make sure to drain the
2415 * buffers_queued list */
2416 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2417 gst_base_parse_finish_fragment (parse, TRUE);
2418 ret = gst_base_parse_send_buffers (parse);
2421 if (ret == GST_FLOW_OK) {
2422 GST_LOG_OBJECT (parse,
2423 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2424 ret = gst_pad_push (parse->srcpad, buffer);
2425 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2426 gst_flow_get_name (ret));
2428 GST_LOG_OBJECT (parse,
2429 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2430 gst_flow_get_name (ret));
2431 gst_buffer_unref (buffer);
2435 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2437 parse->priv->buffers_queued =
2438 g_slist_prepend (parse->priv->buffers_queued, buffer);
2442 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2443 size, gst_flow_get_name (ret));
2444 gst_buffer_unref (buffer);
2445 /* if we are not sufficiently in control, let upstream decide on EOS */
2446 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2447 (parse->priv->passthrough ||
2448 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2449 !parse->priv->upstream_seekable)))
2453 /* Update current running segment position */
2454 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2455 && last_stop != GST_CLOCK_TIME_NONE
2456 && parse->segment.position < last_stop)
2457 parse->segment.position = last_stop;
2464 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2465 return GST_FLOW_FLUSHING;
2467 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2468 return GST_FLOW_ERROR;
2473 * gst_base_parse_finish_frame:
2474 * @parse: a #GstBaseParse
2475 * @frame: a #GstBaseParseFrame
2476 * @size: consumed input data represented by frame
2478 * Collects parsed data and pushes this downstream.
2479 * Source pad caps must be set when this is called.
2481 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2482 * Otherwise, @size samples will be taken from the input and used for output,
2483 * and the output's metadata (timestamps etc) will be taken as (optionally)
2484 * set by the subclass on @frame's (input) buffer (which is otherwise
2485 * ignored for any but the above purpose/information).
2487 * Note that the latter buffer is invalidated by this call, whereas the
2488 * caller retains ownership of @frame.
2490 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2493 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2496 GstFlowReturn ret = GST_FLOW_OK;
2498 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2499 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2500 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2501 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2504 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2505 "flushing size %d", frame->offset, size);
2507 /* some one-time start-up */
2508 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2509 gst_base_parse_check_seekability (parse);
2510 gst_base_parse_check_upstream (parse);
2513 parse->priv->flushed += size;
2515 if (parse->priv->scanning && frame->buffer) {
2516 if (!parse->priv->scanned_frame) {
2517 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2522 /* either PUSH or PULL mode arranges for adapter data */
2523 /* ensure output buffer */
2524 if (!frame->out_buffer) {
2525 GstBuffer *src, *dest;
2527 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2528 dest = frame->out_buffer;
2529 src = frame->buffer;
2530 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2531 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2532 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2533 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2534 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2535 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2537 gst_adapter_flush (parse->priv->adapter, size);
2540 /* use as input for subsequent processing */
2541 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2542 gst_buffer_unref (frame->out_buffer);
2543 frame->out_buffer = NULL;
2545 /* mark input size consumed */
2548 /* subclass might queue frames/data internally if it needs more
2549 * frames to decide on the format, or might request us to queue here. */
2550 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2551 gst_buffer_replace (&frame->buffer, NULL);
2553 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2554 GstBaseParseFrame *copy;
2556 copy = gst_base_parse_frame_copy (frame);
2557 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2558 gst_base_parse_queue_frame (parse, copy);
2562 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2568 /* gst_base_parse_drain:
2570 * Drains the adapter until it is empty. It decreases the min_frame_size to
2571 * match the current adapter size and calls chain method until the adapter
2572 * is emptied or chain returns with error.
2575 gst_base_parse_drain (GstBaseParse * parse)
2579 GST_DEBUG_OBJECT (parse, "draining");
2580 parse->priv->drain = TRUE;
2583 avail = gst_adapter_available (parse->priv->adapter);
2587 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2588 NULL) != GST_FLOW_OK) {
2592 /* nothing changed, maybe due to truncated frame; break infinite loop */
2593 if (avail == gst_adapter_available (parse->priv->adapter)) {
2594 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2595 gst_adapter_clear (parse->priv->adapter);
2599 parse->priv->drain = FALSE;
2602 /* gst_base_parse_send_buffers
2604 * Sends buffers collected in send_buffers downstream, and ensures that list
2605 * is empty at the end (errors or not).
2607 static GstFlowReturn
2608 gst_base_parse_send_buffers (GstBaseParse * parse)
2610 GSList *send = NULL;
2612 GstFlowReturn ret = GST_FLOW_OK;
2613 gboolean first = TRUE;
2615 send = parse->priv->buffers_send;
2619 buf = GST_BUFFER_CAST (send->data);
2620 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2621 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2622 ", offset %" G_GINT64_FORMAT, buf,
2623 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2624 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2625 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2627 /* Make sure the first buffer is always DISCONT. If we split
2628 * GOPs inside the parser this is otherwise not guaranteed */
2630 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2634 /* iterate output queue an push downstream */
2635 ret = gst_pad_push (parse->srcpad, buf);
2636 send = g_slist_delete_link (send, send);
2638 /* clear any leftover if error */
2639 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2641 buf = GST_BUFFER_CAST (send->data);
2642 gst_buffer_unref (buf);
2643 send = g_slist_delete_link (send, send);
2648 parse->priv->buffers_send = send;
2653 /* gst_base_parse_start_fragment:
2655 * Prepares for processing a reverse playback (forward) fragment
2656 * by (re)setting proper state variables.
2658 static GstFlowReturn
2659 gst_base_parse_start_fragment (GstBaseParse * parse)
2661 GST_LOG_OBJECT (parse, "starting fragment");
2663 /* invalidate so no fall-back timestamping is performed;
2664 * ok if taken from subclass or upstream */
2665 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2666 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2667 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2668 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2669 /* prevent it hanging around stop all the time */
2670 parse->segment.position = GST_CLOCK_TIME_NONE;
2672 parse->priv->discont = TRUE;
2674 /* head of previous fragment is now pending tail of current fragment */
2675 parse->priv->buffers_pending = parse->priv->buffers_head;
2676 parse->priv->buffers_head = NULL;
2682 /* gst_base_parse_finish_fragment:
2684 * Processes a reverse playback (forward) fragment:
2685 * - append head of last fragment that was skipped to current fragment data
2686 * - drain the resulting current fragment data (i.e. repeated chain)
2687 * - add time/duration (if needed) to frames queued by chain
2688 * - push queued data
2690 static GstFlowReturn
2691 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2694 GstFlowReturn ret = GST_FLOW_OK;
2695 gboolean seen_key = FALSE, seen_delta = FALSE;
2697 GST_LOG_OBJECT (parse, "finishing fragment");
2700 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2701 while (parse->priv->buffers_pending) {
2702 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2704 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2705 gst_buffer_get_size (buf));
2706 gst_adapter_push (parse->priv->adapter, buf);
2708 GST_LOG_OBJECT (parse, "discarding head buffer");
2709 gst_buffer_unref (buf);
2711 parse->priv->buffers_pending =
2712 g_slist_delete_link (parse->priv->buffers_pending,
2713 parse->priv->buffers_pending);
2716 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2717 /* initial skipped data is added to buffers_pending */
2718 gst_base_parse_drain (parse);
2720 if (parse->priv->buffers_send) {
2721 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2722 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2725 /* add metadata (if needed to queued buffers */
2726 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2727 GST_TIME_ARGS (parse->priv->last_pts));
2728 while (parse->priv->buffers_queued) {
2729 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2731 /* no touching if upstream or parsing provided time */
2732 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2733 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2734 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2735 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2736 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2737 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2738 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2740 parse->priv->last_pts = 0;
2741 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2742 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2743 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2745 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2746 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2747 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2749 parse->priv->last_dts = 0;
2750 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2751 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2752 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2755 /* no idea, very bad */
2756 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2759 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2760 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2762 /* reverse order for ascending sending */
2763 /* send downstream at keyframe not preceded by a keyframe
2764 * (e.g. that should identify start of collection of IDR nals) */
2765 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2767 ret = gst_base_parse_send_buffers (parse);
2768 /* if a problem, throw all to sending */
2769 if (ret != GST_FLOW_OK) {
2770 parse->priv->buffers_send =
2771 g_slist_reverse (parse->priv->buffers_queued);
2772 parse->priv->buffers_queued = NULL;
2782 parse->priv->buffers_send =
2783 g_slist_prepend (parse->priv->buffers_send, buf);
2784 parse->priv->buffers_queued =
2785 g_slist_delete_link (parse->priv->buffers_queued,
2786 parse->priv->buffers_queued);
2789 /* audio may have all marked as keyframe, so arrange to send here. Also
2790 * we might have ended the loop above on a keyframe, in which case we
2792 if (!seen_delta || seen_key)
2793 ret = gst_base_parse_send_buffers (parse);
2795 /* any trailing unused no longer usable (ideally none) */
2796 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2797 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2798 gst_adapter_available (parse->priv->adapter));
2799 gst_adapter_clear (parse->priv->adapter);
2805 /* small helper that checks whether we have been trying to resync too long */
2806 static inline GstFlowReturn
2807 gst_base_parse_check_sync (GstBaseParse * parse)
2809 if (G_UNLIKELY (parse->priv->discont &&
2810 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2811 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2812 ("Failed to parse stream"), (NULL));
2813 return GST_FLOW_ERROR;
2819 static GstFlowReturn
2820 gst_base_parse_process_streamheader (GstBaseParse * parse)
2824 const GValue *value;
2825 GstFlowReturn ret = GST_FLOW_OK;
2827 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2831 str = gst_caps_get_structure (caps, 0);
2832 value = gst_structure_get_value (str, "streamheader");
2836 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2838 if (GST_VALUE_HOLDS_ARRAY (value)) {
2840 gsize len = gst_value_array_get_size (value);
2842 for (i = 0; i < len; i++) {
2844 gst_value_get_buffer (gst_value_array_get_value (value, i));
2846 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2847 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2850 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2851 GstBuffer *buffer = gst_value_get_buffer (value);
2853 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2854 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2857 gst_caps_unref (caps);
2864 gst_caps_unref (caps);
2867 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2872 static GstFlowReturn
2873 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2875 GstBaseParseClass *bclass;
2876 GstBaseParse *parse;
2877 GstFlowReturn ret = GST_FLOW_OK;
2878 GstFlowReturn old_ret = GST_FLOW_OK;
2879 GstBuffer *tmpbuf = NULL;
2883 GstClockTime pts, dts;
2885 parse = GST_BASE_PARSE (parent);
2886 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2887 GST_DEBUG_OBJECT (parent, "chain");
2889 /* early out for speed, if we need to skip */
2890 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
2891 parse->priv->skip = 0;
2892 if (parse->priv->skip > 0) {
2893 gsize bsize = gst_buffer_get_size (buffer);
2894 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2896 if (parse->priv->skip >= bsize) {
2897 parse->priv->skip -= bsize;
2898 GST_DEBUG ("All the buffer is skipped");
2899 parse->priv->offset += bsize;
2900 parse->priv->sync_offset = parse->priv->offset;
2903 buffer = gst_buffer_make_writable (buffer);
2904 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2905 parse->priv->offset += parse->priv->skip;
2906 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2907 (unsigned) (bsize - parse->priv->skip));
2908 parse->priv->skip = 0;
2909 parse->priv->discont = TRUE;
2912 if (G_UNLIKELY (parse->priv->first_buffer)) {
2913 parse->priv->first_buffer = FALSE;
2914 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2915 /* this stream has no header buffers, check if we just prepend the
2916 * streamheader from caps to the stream */
2917 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2918 "prepend to the stream");
2919 gst_base_parse_process_streamheader (parse);
2921 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2922 "streamheader from caps");
2926 if (parse->priv->detecting) {
2927 GstBuffer *detect_buf;
2929 if (parse->priv->detect_buffers_size == 0) {
2930 detect_buf = gst_buffer_ref (buffer);
2935 detect_buf = gst_buffer_new ();
2937 for (l = parse->priv->detect_buffers; l; l = l->next) {
2938 gsize tmpsize = gst_buffer_get_size (l->data);
2940 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2941 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2945 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2946 offset, gst_buffer_get_size (buffer));
2949 ret = bclass->detect (parse, detect_buf);
2950 gst_buffer_unref (detect_buf);
2952 if (ret == GST_FLOW_OK) {
2955 /* Detected something */
2956 parse->priv->detecting = FALSE;
2958 for (l = parse->priv->detect_buffers; l; l = l->next) {
2959 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2961 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2962 parent, GST_BUFFER_CAST (l->data));
2964 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2966 g_list_free (parse->priv->detect_buffers);
2967 parse->priv->detect_buffers = NULL;
2968 parse->priv->detect_buffers_size = 0;
2970 if (ret != GST_FLOW_OK) {
2974 /* Handle the current buffer */
2975 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2976 /* Still detecting, append buffer or error out if draining */
2978 if (parse->priv->drain) {
2979 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2980 return GST_FLOW_ERROR;
2981 } else if (parse->priv->flushing) {
2982 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2984 g_list_free (parse->priv->detect_buffers);
2985 parse->priv->detect_buffers = NULL;
2986 parse->priv->detect_buffers_size = 0;
2988 parse->priv->detect_buffers =
2989 g_list_append (parse->priv->detect_buffers, buffer);
2990 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2994 /* Something went wrong, subclass responsible for error reporting */
2998 /* And now handle the current buffer if detection worked */
3001 if (G_LIKELY (buffer)) {
3002 GST_LOG_OBJECT (parse,
3003 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3004 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3005 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3006 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3007 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3009 if (G_UNLIKELY (!parse->priv->disable_passthrough
3010 && parse->priv->passthrough)) {
3011 GstBaseParseFrame frame;
3013 gst_base_parse_frame_init (&frame);
3014 frame.buffer = gst_buffer_make_writable (buffer);
3015 ret = gst_base_parse_push_frame (parse, &frame);
3016 gst_base_parse_frame_free (&frame);
3019 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3020 /* upstream feeding us in reverse playback;
3021 * finish previous fragment and start new upon DISCONT */
3022 if (parse->segment.rate < 0.0) {
3023 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3024 ret = gst_base_parse_finish_fragment (parse, TRUE);
3025 gst_base_parse_start_fragment (parse);
3027 /* discont in the stream, drain and mark discont for next output */
3028 gst_base_parse_drain (parse);
3029 parse->priv->discont = TRUE;
3032 gst_adapter_push (parse->priv->adapter, buffer);
3035 /* Parse and push as many frames as possible */
3036 /* Stop either when adapter is empty or we are flushing */
3037 while (!parse->priv->flushing) {
3040 /* note: if subclass indicates MAX fsize,
3041 * this will not likely be available anyway ... */
3042 min_size = MAX (parse->priv->min_frame_size, fsize);
3043 av = gst_adapter_available (parse->priv->adapter);
3045 if (G_UNLIKELY (parse->priv->drain)) {
3047 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3048 if (G_UNLIKELY (!min_size)) {
3053 /* Collect at least min_frame_size bytes */
3054 if (av < min_size) {
3055 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3059 /* move along with upstream timestamp (if any),
3060 * but interpolate in between */
3061 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3062 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3063 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
3064 parse->priv->prev_pts = parse->priv->next_pts = pts;
3066 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
3067 parse->priv->prev_dts = parse->priv->next_dts = dts;
3069 /* we can mess with, erm interpolate, timestamps,
3070 * and incoming stuff has PTS but no DTS seen so far,
3071 * then pick up DTS from PTS and hope for the best ... */
3072 if (parse->priv->infer_ts &&
3073 parse->priv->pts_interpolate &&
3074 !GST_CLOCK_TIME_IS_VALID (dts) &&
3075 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
3076 GST_CLOCK_TIME_IS_VALID (pts))
3077 parse->priv->next_dts = pts;
3079 /* always pass all available data */
3080 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3082 /* already inform subclass what timestamps we have planned,
3083 * at least if provided by time-based upstream */
3084 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3085 tmpbuf = gst_buffer_make_writable (tmpbuf);
3086 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3087 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3088 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3091 /* keep the adapter mapped, so keep track of what has to be flushed */
3092 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3095 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3098 if (skip == 0 && flush == 0) {
3099 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3100 "breaking to get more data");
3101 /* ignore this return as it produced no data */
3109 GST_LOG_OBJECT (parse, "chain leaving");
3113 /* pull @size bytes at current offset,
3114 * i.e. at least try to and possibly return a shorter buffer if near the end */
3115 static GstFlowReturn
3116 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3117 GstBuffer ** buffer)
3119 GstFlowReturn ret = GST_FLOW_OK;
3121 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3123 /* Caching here actually makes much less difference than one would expect.
3124 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3125 if (parse->priv->cache) {
3126 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3127 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3129 if (cache_offset <= parse->priv->offset &&
3130 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3131 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3132 parse->priv->offset - cache_offset, size);
3133 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3136 /* not enough data in the cache, free cache and get a new one */
3137 gst_buffer_unref (parse->priv->cache);
3138 parse->priv->cache = NULL;
3141 /* refill the cache */
3143 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3144 64 * 1024), &parse->priv->cache);
3145 if (ret != GST_FLOW_OK) {
3146 parse->priv->cache = NULL;
3150 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3152 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3154 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3158 /* Not possible to get enough data, try a last time with
3159 * requesting exactly the size we need */
3160 gst_buffer_unref (parse->priv->cache);
3161 parse->priv->cache = NULL;
3163 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3164 &parse->priv->cache);
3166 if (ret != GST_FLOW_OK) {
3167 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3172 if (gst_buffer_get_size (parse->priv->cache) < size) {
3173 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3174 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3175 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3177 *buffer = parse->priv->cache;
3178 parse->priv->cache = NULL;
3184 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3185 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3190 static GstFlowReturn
3191 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3194 GstClockTime ts = 0;
3198 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3199 ", last_offset = %" G_GINT64_FORMAT,
3200 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3202 if (!parse->priv->last_offset
3203 || parse->priv->last_pts <= parse->segment.start) {
3204 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3205 GST_TIME_ARGS (parse->segment.start));
3210 /* last fragment started at last_offset / last_ts;
3211 * seek back 10s capped at 1MB */
3212 if (parse->priv->last_pts >= 10 * GST_SECOND)
3213 ts = parse->priv->last_pts - 10 * GST_SECOND;
3214 /* if we are exact now, we will be more so going backwards */
3215 if (parse->priv->exact_position) {
3216 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3218 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3219 GST_FORMAT_BYTES, &offset)) {
3220 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3223 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3224 parse->priv->last_offset - 1024);
3225 offset = MAX (0, offset);
3227 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3229 parse->priv->offset = offset;
3231 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3233 if (ret != GST_FLOW_OK)
3236 /* offset will increase again as fragment is processed/parsed */
3237 parse->priv->last_offset = offset;
3239 gst_base_parse_start_fragment (parse);
3240 gst_adapter_push (parse->priv->adapter, buffer);
3241 ret = gst_base_parse_finish_fragment (parse, TRUE);
3242 if (ret != GST_FLOW_OK)
3245 /* force previous fragment */
3246 parse->priv->offset = -1;
3253 * pull and scan for next frame starting from current offset
3254 * ajusts sync, drain and offset going along */
3255 static GstFlowReturn
3256 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3259 GstFlowReturn ret = GST_FLOW_OK;
3260 guint fsize, min_size;
3264 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3265 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3267 /* let's make this efficient for all subclass once and for all;
3268 * maybe it does not need this much, but in the latter case, we know we are
3269 * in pull mode here and might as well try to read and supply more anyway
3270 * (so does the buffer caching mechanism) */
3274 min_size = MAX (parse->priv->min_frame_size, fsize);
3276 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3278 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3279 if (ret != GST_FLOW_OK)
3282 /* if we got a short read, inform subclass we are draining leftover
3283 * and no more is to be expected */
3284 if (gst_buffer_get_size (buffer) < min_size) {
3285 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3286 parse->priv->drain = TRUE;
3289 if (parse->priv->detecting) {
3290 ret = klass->detect (parse, buffer);
3291 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3292 /* If draining we error out, otherwise request a buffer
3294 if (parse->priv->drain) {
3295 gst_buffer_unref (buffer);
3296 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3297 return GST_FLOW_ERROR;
3300 gst_buffer_unref (buffer);
3303 } else if (ret != GST_FLOW_OK) {
3304 gst_buffer_unref (buffer);
3305 GST_ERROR_OBJECT (parse, "detect() returned %s",
3306 gst_flow_get_name (ret));
3310 /* Else handle this buffer normally */
3313 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3314 if (ret != GST_FLOW_OK)
3317 /* If a large amount of data was requested to be skipped, _handle_buffer
3318 might have set the priv->skip flag to an extra amount on top of skip.
3319 In pull mode, we can just pull from the new offset directly. */
3320 parse->priv->offset += parse->priv->skip;
3321 parse->priv->skip = 0;
3323 /* something flushed means something happened,
3324 * and we should bail out of this loop so as not to occupy
3325 * the task thread indefinitely */
3327 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3330 /* nothing flushed, no skip and draining, so nothing left to do */
3331 if (!skip && parse->priv->drain) {
3332 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3333 "breaking loop and marking EOS");
3337 /* otherwise, get some more data
3338 * note that is checked this does not happen indefinitely */
3340 GST_LOG_OBJECT (parse, "getting some more data");
3343 parse->priv->drain = FALSE;
3350 /* Loop that is used in pull mode to retrieve data from upstream */
3352 gst_base_parse_loop (GstPad * pad)
3354 GstBaseParse *parse;
3355 GstBaseParseClass *klass;
3356 GstFlowReturn ret = GST_FLOW_OK;
3358 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3359 klass = GST_BASE_PARSE_GET_CLASS (parse);
3361 GST_LOG_OBJECT (parse, "Entering parse loop");
3363 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3368 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3371 event = gst_event_new_stream_start (stream_id);
3372 gst_event_set_group_id (event, gst_util_group_id_next ());
3374 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3375 gst_pad_push_event (parse->srcpad, event);
3376 parse->priv->push_stream_start = FALSE;
3380 /* reverse playback:
3381 * first fragment (closest to stop time) is handled normally below,
3382 * then we pull in fragments going backwards */
3383 if (parse->segment.rate < 0.0) {
3384 /* check if we jumped back to a previous fragment,
3385 * which is a post-first fragment */
3386 if (parse->priv->offset < 0) {
3387 ret = gst_base_parse_handle_previous_fragment (parse);
3392 ret = gst_base_parse_scan_frame (parse, klass);
3394 /* eat expected eos signalling past segment in reverse playback */
3395 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3396 parse->segment.position >= parse->segment.stop) {
3397 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3398 /* push what was accumulated during loop run */
3399 gst_base_parse_finish_fragment (parse, FALSE);
3400 /* force previous fragment */
3401 parse->priv->offset = -1;
3405 if (ret != GST_FLOW_OK)
3409 if (ret == GST_FLOW_EOS)
3411 else if (ret != GST_FLOW_OK)
3414 gst_object_unref (parse);
3421 GST_DEBUG_OBJECT (parse, "eos");
3426 gboolean push_eos = FALSE;
3428 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3429 gst_flow_get_name (ret));
3430 gst_pad_pause_task (parse->sinkpad);
3432 if (ret == GST_FLOW_EOS) {
3433 /* handle end-of-stream/segment */
3434 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3437 if ((stop = parse->segment.stop) == -1)
3438 stop = parse->segment.duration;
3440 GST_DEBUG_OBJECT (parse, "sending segment_done");
3442 gst_element_post_message
3443 (GST_ELEMENT_CAST (parse),
3444 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3445 GST_FORMAT_TIME, stop));
3446 gst_pad_push_event (parse->srcpad,
3447 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3449 /* If we STILL have zero frames processed, fire an error */
3450 if (parse->priv->framecount == 0) {
3451 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3452 ("No valid frames found before end of stream"), (NULL));
3456 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3457 /* for fatal errors we post an error message, wrong-state is
3458 * not fatal because it happens due to flushes and only means
3459 * that we should stop now. */
3460 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3461 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3465 if (parse->priv->estimated_duration <= 0) {
3466 gst_base_parse_update_duration (parse);
3468 /* Push pending events, including SEGMENT events */
3469 gst_base_parse_push_pending_events (parse);
3471 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3473 gst_object_unref (parse);
3478 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3480 GstSchedulingFlags sched_flags;
3481 GstBaseParse *parse;
3485 parse = GST_BASE_PARSE (parent);
3487 GST_DEBUG_OBJECT (parse, "sink activate");
3489 query = gst_query_new_scheduling ();
3490 if (!gst_pad_peer_query (sinkpad, query)) {
3491 gst_query_unref (query);
3492 goto baseparse_push;
3495 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3497 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3498 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3500 gst_query_unref (query);
3503 goto baseparse_push;
3505 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3506 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3507 goto baseparse_push;
3509 parse->priv->push_stream_start = TRUE;
3511 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3516 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3517 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3522 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3524 GstBaseParseClass *klass;
3525 gboolean result = TRUE;
3527 GST_DEBUG_OBJECT (parse, "activate %d", active);
3529 klass = GST_BASE_PARSE_GET_CLASS (parse);
3532 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3533 result = klass->start (parse);
3535 /* If the subclass implements ::detect we want to
3536 * call it for the first buffers now */
3537 parse->priv->detecting = (klass->detect != NULL);
3539 /* We must make sure streaming has finished before resetting things
3540 * and calling the ::stop vfunc */
3541 GST_PAD_STREAM_LOCK (parse->sinkpad);
3542 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3544 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3545 result = klass->stop (parse);
3547 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3549 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3554 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3555 GstPadMode mode, gboolean active)
3558 GstBaseParse *parse;
3560 parse = GST_BASE_PARSE (parent);
3562 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3563 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3565 if (!gst_base_parse_activate (parse, active))
3566 goto activate_failed;
3569 case GST_PAD_MODE_PULL:
3571 parse->priv->pending_events =
3572 g_list_prepend (parse->priv->pending_events,
3573 gst_event_new_segment (&parse->segment));
3576 result = gst_pad_stop_task (pad);
3584 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3586 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3593 GST_DEBUG_OBJECT (parse, "activate failed");
3599 * gst_base_parse_set_duration:
3600 * @parse: #GstBaseParse.
3602 * @duration: duration value.
3603 * @interval: how often to update the duration estimate based on bitrate, or 0.
3605 * Sets the duration of the currently playing media. Subclass can use this
3606 * when it is able to determine duration and/or notices a change in the media
3607 * duration. Alternatively, if @interval is non-zero (default), then stream
3608 * duration is determined based on estimated bitrate, and updated every @interval
3612 gst_base_parse_set_duration (GstBaseParse * parse,
3613 GstFormat fmt, gint64 duration, gint interval)
3615 g_return_if_fail (parse != NULL);
3617 if (parse->priv->upstream_has_duration) {
3618 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3622 if (duration != parse->priv->duration) {
3625 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3626 gst_element_post_message (GST_ELEMENT (parse), m);
3628 /* TODO: what about duration tag? */
3630 parse->priv->duration = duration;
3631 parse->priv->duration_fmt = fmt;
3632 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3633 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3634 if (interval != 0) {
3635 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3639 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3640 parse->priv->update_interval = interval;
3646 * gst_base_parse_set_average_bitrate:
3647 * @parse: #GstBaseParse.
3648 * @bitrate: average bitrate in bits/second
3650 * Optionally sets the average bitrate detected in media (if non-zero),
3651 * e.g. based on metadata, as it will be posted to the application.
3653 * By default, announced average bitrate is estimated. The average bitrate
3654 * is used to estimate the total duration of the stream and to estimate
3655 * a seek position, if there's no index and the format is syncable
3656 * (see gst_base_parse_set_syncable()).
3659 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3661 parse->priv->bitrate = bitrate;
3662 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3666 * gst_base_parse_set_min_frame_size:
3667 * @parse: #GstBaseParse.
3668 * @min_size: Minimum size of the data that this base class should give to
3671 * Subclass can use this function to tell the base class that it needs to
3672 * give at least #min_size buffers.
3675 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3677 g_return_if_fail (parse != NULL);
3679 parse->priv->min_frame_size = min_size;
3680 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3684 * gst_base_parse_set_frame_rate:
3685 * @parse: the #GstBaseParse to set
3686 * @fps_num: frames per second (numerator).
3687 * @fps_den: frames per second (denominator).
3688 * @lead_in: frames needed before a segment for subsequent decode
3689 * @lead_out: frames needed after a segment
3691 * If frames per second is configured, parser can take care of buffer duration
3692 * and timestamping. When performing segment clipping, or seeking to a specific
3693 * location, a corresponding decoder might need an initial @lead_in and a
3694 * following @lead_out number of frames to ensure the desired segment is
3695 * entirely filled upon decoding.
3698 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3699 guint fps_den, guint lead_in, guint lead_out)
3701 g_return_if_fail (parse != NULL);
3703 parse->priv->fps_num = fps_num;
3704 parse->priv->fps_den = fps_den;
3705 if (!fps_num || !fps_den) {
3706 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3708 fps_num = fps_den = 0;
3709 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3710 parse->priv->lead_in = parse->priv->lead_out = 0;
3711 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3713 parse->priv->frame_duration =
3714 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3715 parse->priv->lead_in = lead_in;
3716 parse->priv->lead_out = lead_out;
3717 parse->priv->lead_in_ts =
3718 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3719 parse->priv->lead_out_ts =
3720 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3721 /* aim for about 1.5s to estimate duration */
3722 if (parse->priv->update_interval < 0) {
3723 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3724 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3725 parse->priv->update_interval);
3728 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3729 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3730 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3731 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3732 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3733 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3737 * gst_base_parse_set_has_timing_info:
3738 * @parse: a #GstBaseParse
3739 * @has_timing: whether frames carry timing information
3741 * Set if frames carry timing information which the subclass can (generally)
3742 * parse and provide. In particular, intrinsic (rather than estimated) time
3743 * can be obtained following a seek.
3746 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3748 parse->priv->has_timing_info = has_timing;
3749 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3753 * gst_base_parse_set_syncable:
3754 * @parse: a #GstBaseParse
3755 * @syncable: set if frame starts can be identified
3757 * Set if frame starts can be identified. This is set by default and
3758 * determines whether seeking based on bitrate averages
3759 * is possible for a format/stream.
3762 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3764 parse->priv->syncable = syncable;
3765 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3769 * gst_base_parse_set_passthrough:
3770 * @parse: a #GstBaseParse
3771 * @passthrough: %TRUE if parser should run in passthrough mode
3773 * Set if the nature of the format or configuration does not allow (much)
3774 * parsing, and the parser should operate in passthrough mode (which only
3775 * applies when operating in push mode). That is, incoming buffers are
3776 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3777 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3778 * so subclass can perform as much or as little is appropriate for
3779 * passthrough semantics in @pre_push_frame.
3782 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3784 parse->priv->passthrough = passthrough;
3785 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3789 * gst_base_parse_set_pts_interpolation:
3790 * @parse: a #GstBaseParse
3791 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3793 * By default, the base class will guess PTS timestamps using a simple
3794 * interpolation (previous timestamp + duration), which is incorrect for
3795 * data streams with reordering, where PTS can go backward. Sub-classes
3796 * implementing such formats should disable PTS interpolation.
3799 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3800 gboolean pts_interpolate)
3802 parse->priv->pts_interpolate = pts_interpolate;
3803 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3804 (pts_interpolate) ? "yes" : "no");
3808 * gst_base_parse_set_infer_ts:
3809 * @parse: a #GstBaseParse
3810 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3812 * By default, the base class might try to infer PTS from DTS and vice
3813 * versa. While this is generally correct for audio data, it may not
3814 * be otherwise. Sub-classes implementing such formats should disable
3815 * timestamp inferring.
3818 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3820 parse->priv->infer_ts = infer_ts;
3821 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3825 * gst_base_parse_set_latency:
3826 * @parse: a #GstBaseParse
3827 * @min_latency: minimum parse latency
3828 * @max_latency: maximum parse latency
3830 * Sets the minimum and maximum (which may likely be equal) latency introduced
3831 * by the parsing process. If there is such a latency, which depends on the
3832 * particular parsing of the format, it typically corresponds to 1 frame duration.
3835 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3836 GstClockTime max_latency)
3838 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3839 g_return_if_fail (min_latency <= max_latency);
3841 GST_OBJECT_LOCK (parse);
3842 parse->priv->min_latency = min_latency;
3843 parse->priv->max_latency = max_latency;
3844 GST_OBJECT_UNLOCK (parse);
3845 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3846 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3847 GST_TIME_ARGS (max_latency));
3851 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3852 GstClockTime * duration)
3854 gboolean res = FALSE;
3856 g_return_val_if_fail (duration != NULL, FALSE);
3858 *duration = GST_CLOCK_TIME_NONE;
3859 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3860 GST_LOG_OBJECT (parse, "using provided duration");
3861 *duration = parse->priv->duration;
3863 } else if (parse->priv->duration != -1) {
3864 GST_LOG_OBJECT (parse, "converting provided duration");
3865 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3866 parse->priv->duration, format, (gint64 *) duration);
3867 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3868 GST_LOG_OBJECT (parse, "using estimated duration");
3869 *duration = parse->priv->estimated_duration;
3872 GST_LOG_OBJECT (parse, "cannot estimate duration");
3875 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3876 GST_TIME_ARGS (*duration));
3881 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3883 gboolean res = FALSE;
3886 pad = GST_BASE_PARSE_SRC_PAD (parse);
3888 switch (GST_QUERY_TYPE (query)) {
3889 case GST_QUERY_POSITION:
3894 GST_DEBUG_OBJECT (parse, "position query");
3895 gst_query_parse_position (query, &format, NULL);
3897 /* try upstream first */
3898 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3900 /* Fall back on interpreting segment */
3901 GST_OBJECT_LOCK (parse);
3902 if (format == GST_FORMAT_BYTES) {
3903 dest_value = parse->priv->offset;
3905 } else if (format == parse->segment.format &&
3906 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3907 dest_value = gst_segment_to_stream_time (&parse->segment,
3908 parse->segment.format, parse->segment.position);
3911 GST_OBJECT_UNLOCK (parse);
3913 /* no precise result, upstream no idea either, then best estimate */
3914 /* priv->offset is updated in both PUSH/PULL modes */
3915 res = gst_base_parse_convert (parse,
3916 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3919 gst_query_set_position (query, format, dest_value);
3923 case GST_QUERY_DURATION:
3926 GstClockTime duration;
3928 GST_DEBUG_OBJECT (parse, "duration query");
3929 gst_query_parse_duration (query, &format, NULL);
3931 /* consult upstream */
3932 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3934 /* otherwise best estimate from us */
3936 res = gst_base_parse_get_duration (parse, format, &duration);
3938 gst_query_set_duration (query, format, duration);
3942 case GST_QUERY_SEEKING:
3945 GstClockTime duration = GST_CLOCK_TIME_NONE;
3946 gboolean seekable = FALSE;
3948 GST_DEBUG_OBJECT (parse, "seeking query");
3949 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3951 /* consult upstream */
3952 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3954 /* we may be able to help if in TIME */
3955 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3956 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3957 /* already OK if upstream takes care */
3958 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3960 if (!(res && seekable)) {
3961 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3962 || duration == -1) {
3963 /* seekable if we still have a chance to get duration later on */
3965 parse->priv->upstream_seekable && parse->priv->update_interval;
3967 seekable = parse->priv->upstream_seekable;
3968 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3971 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3977 case GST_QUERY_FORMATS:
3978 gst_query_set_formatsv (query, 3, fmtlist);
3981 case GST_QUERY_CONVERT:
3983 GstFormat src_format, dest_format;
3984 gint64 src_value, dest_value;
3986 gst_query_parse_convert (query, &src_format, &src_value,
3987 &dest_format, &dest_value);
3989 res = gst_base_parse_convert (parse, src_format, src_value,
3990 dest_format, &dest_value);
3992 gst_query_set_convert (query, src_format, src_value,
3993 dest_format, dest_value);
3997 case GST_QUERY_LATENCY:
3999 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4001 GstClockTime min_latency, max_latency;
4003 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4004 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4005 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4006 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4008 GST_OBJECT_LOCK (parse);
4009 /* add our latency */
4010 min_latency += parse->priv->min_latency;
4011 if (max_latency == -1 || parse->priv->max_latency == -1)
4014 max_latency += parse->priv->max_latency;
4015 GST_OBJECT_UNLOCK (parse);
4017 gst_query_set_latency (query, live, min_latency, max_latency);
4021 case GST_QUERY_SEGMENT:
4026 format = parse->segment.format;
4029 gst_segment_to_stream_time (&parse->segment, format,
4030 parse->segment.start);
4031 if ((stop = parse->segment.stop) == -1)
4032 stop = parse->segment.duration;
4034 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4036 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4041 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4047 /* scans for a cluster start from @pos,
4048 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4049 static GstFlowReturn
4050 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4051 GstClockTime * time, GstClockTime * duration)
4053 GstBaseParseClass *klass;
4055 gboolean orig_drain, orig_discont;
4056 GstFlowReturn ret = GST_FLOW_OK;
4057 GstBuffer *buf = NULL;
4058 GstBaseParseFrame *sframe = NULL;
4060 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4061 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4062 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4064 klass = GST_BASE_PARSE_GET_CLASS (parse);
4066 *time = GST_CLOCK_TIME_NONE;
4067 *duration = GST_CLOCK_TIME_NONE;
4070 orig_offset = parse->priv->offset;
4071 orig_discont = parse->priv->discont;
4072 orig_drain = parse->priv->drain;
4074 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4075 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4077 /* jump elsewhere and locate next frame */
4078 parse->priv->offset = *pos;
4079 /* mark as scanning so frames don't get processed all the way */
4080 parse->priv->scanning = TRUE;
4081 ret = gst_base_parse_scan_frame (parse, klass);
4082 parse->priv->scanning = FALSE;
4083 /* retrieve frame found during scan */
4084 sframe = parse->priv->scanned_frame;
4085 parse->priv->scanned_frame = NULL;
4087 if (ret != GST_FLOW_OK || !sframe)
4090 /* get offset first, subclass parsing might dump other stuff in there */
4091 *pos = sframe->offset;
4092 buf = sframe->buffer;
4095 /* but it should provide proper time */
4096 *time = GST_BUFFER_TIMESTAMP (buf);
4097 *duration = GST_BUFFER_DURATION (buf);
4099 GST_LOG_OBJECT (parse,
4100 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4101 GST_TIME_ARGS (*time), *pos);
4105 gst_base_parse_frame_free (sframe);
4108 parse->priv->offset = orig_offset;
4109 parse->priv->discont = orig_discont;
4110 parse->priv->drain = orig_drain;
4115 /* bisect and scan through file for frame starting before @time,
4116 * returns OK and @time/@offset if found, NONE and/or error otherwise
4117 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4118 static GstFlowReturn
4119 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4122 GstFlowReturn ret = GST_FLOW_OK;
4123 gint64 lpos, hpos, newpos;
4124 GstClockTime time, ltime, htime, newtime, dur;
4125 gboolean cont = TRUE;
4126 const GstClockTime tolerance = TARGET_DIFFERENCE;
4127 const guint chunk = 4 * 1024;
4129 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4130 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4132 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4133 GST_TIME_ARGS (*_time));
4135 /* TODO also make keyframe aware if useful some day */
4150 /* do not know at first */
4152 *_time = GST_CLOCK_TIME_NONE;
4154 /* need initial positions; start and end */
4155 lpos = parse->priv->first_frame_offset;
4156 ltime = parse->priv->first_frame_pts;
4157 /* try other one if no luck */
4158 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4159 ltime = parse->priv->first_frame_dts;
4160 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4161 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4162 return GST_FLOW_ERROR;
4164 hpos = parse->priv->upstream_size;
4166 GST_DEBUG_OBJECT (parse,
4167 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4168 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4169 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4171 /* check preconditions are satisfied;
4172 * start and end are needed, except for special case where we scan for
4173 * last frame to determine duration */
4174 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4175 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4176 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4180 /* shortcut cases */
4183 } else if (time < ltime + tolerance) {
4187 } else if (time >= htime) {
4193 while (htime > ltime && cont) {
4194 GST_LOG_OBJECT (parse,
4195 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4196 GST_TIME_ARGS (ltime));
4197 GST_LOG_OBJECT (parse,
4198 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4199 GST_TIME_ARGS (htime));
4200 if (G_UNLIKELY (time == G_MAXINT64)) {
4202 } else if (G_LIKELY (hpos > lpos)) {
4204 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4207 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4209 /* we check this case once, but not forever, so break loop */
4214 newpos = CLAMP (newpos, lpos, hpos);
4215 GST_LOG_OBJECT (parse,
4216 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4217 GST_TIME_ARGS (time), newpos);
4219 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4220 if (ret == GST_FLOW_EOS) {
4221 /* heuristic HACK */
4222 hpos = MAX (lpos, hpos - chunk);
4224 } else if (ret != GST_FLOW_OK) {
4228 if (newtime == -1 || newpos == -1) {
4229 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4233 if (G_UNLIKELY (time == G_MAXINT64)) {
4236 if (GST_CLOCK_TIME_IS_VALID (dur))
4239 } else if (newtime > time) {
4241 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4243 } else if (newtime + tolerance > time) {
4244 /* close enough undershoot */
4248 } else if (newtime < ltime) {
4249 /* so a position beyond lpos resulted in earlier time than ltime ... */
4250 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4253 /* undershoot too far */
4254 newpos += newpos == lpos ? chunk : 0;
4255 lpos = CLAMP (newpos, lpos, hpos);
4261 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4262 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4267 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4268 gboolean before, GstClockTime * _ts)
4270 gint64 bytes = 0, ts = 0;
4271 GstIndexEntry *entry = NULL;
4273 if (time == GST_CLOCK_TIME_NONE) {
4279 GST_BASE_PARSE_INDEX_LOCK (parse);
4280 if (parse->priv->index) {
4281 /* Let's check if we have an index entry for that time */
4282 entry = gst_index_get_assoc_entry (parse->priv->index,
4283 parse->priv->index_id,
4284 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4285 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4289 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4290 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4292 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4293 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4294 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4296 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4297 GST_TIME_ARGS (time));
4300 ts = GST_CLOCK_TIME_NONE;
4303 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4312 /* returns TRUE if seek succeeded */
4314 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4319 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4320 gboolean flush, update, res = TRUE, accurate;
4321 gint64 start, stop, seekpos, seekstop;
4322 GstSegment seeksegment = { 0, };
4323 GstClockTime start_ts;
4325 GstEvent *segment_event;
4327 /* try upstream first, unless we're driving the streaming thread ourselves */
4328 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4329 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4334 gst_event_parse_seek (event, &rate, &format, &flags,
4335 &start_type, &start, &stop_type, &stop);
4336 seqnum = gst_event_get_seqnum (event);
4338 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4339 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4340 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4341 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4343 /* we can only handle TIME, so check if subclass can convert
4344 * to TIME format if it's some other format (such as DEFAULT) */
4345 if (format != GST_FORMAT_TIME) {
4346 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4347 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4349 goto no_convert_to_time;
4351 GST_INFO_OBJECT (parse, "converted %s format to start time "
4352 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4353 gst_format_get_name (format), GST_TIME_ARGS (start),
4354 GST_TIME_ARGS (stop));
4356 format = GST_FORMAT_TIME;
4359 /* no negative rates in push mode (unless upstream takes care of that, but
4360 * we've already tried upstream and it didn't handle the seek request) */
4361 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4364 if (start_type != GST_SEEK_TYPE_SET ||
4365 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4368 /* get flush flag */
4369 flush = flags & GST_SEEK_FLAG_FLUSH;
4371 /* copy segment, we need this because we still need the old
4372 * segment when we close the current segment. */
4373 gst_segment_copy_into (&parse->segment, &seeksegment);
4375 GST_DEBUG_OBJECT (parse, "configuring seek");
4376 gst_segment_do_seek (&seeksegment, rate, format, flags,
4377 start_type, start, stop_type, stop, &update);
4379 /* accurate seeking implies seek tables are used to obtain position,
4380 * and the requested segment is maintained exactly, not adjusted any way */
4381 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4383 /* maybe we can be accurate for (almost) free */
4384 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4385 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4386 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4391 GstClockTime startpos;
4393 startpos = seeksegment.position;
4397 /* accurate requested, so ... seek a bit before target */
4398 if (startpos < parse->priv->lead_in_ts)
4401 startpos -= parse->priv->lead_in_ts;
4403 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4404 seeksegment.stop = seeksegment.start + seeksegment.duration;
4406 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4407 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4411 start_ts = seeksegment.position;
4415 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4416 seeksegment.stop = seeksegment.start + seeksegment.duration;
4418 if (!gst_base_parse_convert (parse, format, start_ts,
4419 GST_FORMAT_BYTES, &seekpos))
4420 goto convert_failed;
4421 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4422 GST_FORMAT_BYTES, &seekstop))
4423 goto convert_failed;
4426 GST_DEBUG_OBJECT (parse,
4427 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4429 GST_DEBUG_OBJECT (parse,
4430 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4431 seeksegment.stop, seekstop);
4433 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4436 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4439 if (parse->srcpad) {
4440 GstEvent *fevent = gst_event_new_flush_start ();
4441 GST_DEBUG_OBJECT (parse, "sending flush start");
4443 gst_event_set_seqnum (fevent, seqnum);
4445 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4446 /* unlock upstream pull_range */
4447 gst_pad_push_event (parse->sinkpad, fevent);
4450 gst_pad_pause_task (parse->sinkpad);
4453 /* we should now be able to grab the streaming thread because we stopped it
4454 * with the above flush/pause code */
4455 GST_PAD_STREAM_LOCK (parse->sinkpad);
4457 /* save current position */
4458 last_stop = parse->segment.position;
4459 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4462 /* now commit to new position */
4464 /* prepare for streaming again */
4466 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4467 GST_DEBUG_OBJECT (parse, "sending flush stop");
4468 gst_event_set_seqnum (fevent, seqnum);
4469 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4470 gst_pad_push_event (parse->sinkpad, fevent);
4471 gst_base_parse_clear_queues (parse);
4473 /* keep track of our position */
4474 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4475 seeksegment.format, parse->segment.position);
4478 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4480 /* store the newsegment event so it can be sent from the streaming thread. */
4481 /* This will be sent later in _loop() */
4482 segment_event = gst_event_new_segment (&parse->segment);
4483 gst_event_set_seqnum (segment_event, seqnum);
4484 parse->priv->pending_events =
4485 g_list_prepend (parse->priv->pending_events, segment_event);
4487 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4488 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4489 ", time = %" GST_TIME_FORMAT, format,
4490 GST_TIME_ARGS (parse->segment.start),
4491 GST_TIME_ARGS (parse->segment.stop),
4492 GST_TIME_ARGS (parse->segment.time));
4494 /* one last chance in pull mode to stay accurate;
4495 * maybe scan and subclass can find where to go */
4498 GstClockTime ts = seeksegment.position;
4500 gst_base_parse_locate_time (parse, &ts, &scanpos);
4504 /* running collected index now consists of several intervals,
4505 * so optimized check no longer possible */
4506 parse->priv->index_last_valid = FALSE;
4507 parse->priv->index_last_offset = 0;
4508 parse->priv->index_last_ts = 0;
4512 /* mark discont if we are going to stream from another position. */
4513 if (seekpos != parse->priv->offset) {
4514 GST_DEBUG_OBJECT (parse,
4515 "mark DISCONT, we did a seek to another position");
4516 parse->priv->offset = seekpos;
4517 parse->priv->last_offset = seekpos;
4518 parse->priv->seen_keyframe = FALSE;
4519 parse->priv->discont = TRUE;
4520 parse->priv->next_dts = start_ts;
4521 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4522 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4523 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4524 parse->priv->sync_offset = seekpos;
4525 parse->priv->exact_position = accurate;
4528 /* Start streaming thread if paused */
4529 gst_pad_start_task (parse->sinkpad,
4530 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4532 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4537 GstEvent *new_event;
4538 GstBaseParseSeek *seek;
4539 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4541 /* The only thing we need to do in PUSH-mode is to send the
4542 seek event (in bytes) to upstream. Segment / flush handling happens
4543 in corresponding src event handlers */
4544 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4545 if (seekstop >= 0 && seekstop <= seekpos)
4547 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4548 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4549 gst_event_set_seqnum (new_event, seqnum);
4551 /* store segment info so its precise details can be reconstructed when
4552 * receiving newsegment;
4553 * this matters for all details when accurate seeking,
4554 * is most useful to preserve NONE stop time otherwise */
4555 seek = g_new0 (GstBaseParseSeek, 1);
4556 seek->segment = seeksegment;
4557 seek->accurate = accurate;
4558 seek->offset = seekpos;
4559 seek->start_ts = start_ts;
4560 GST_OBJECT_LOCK (parse);
4561 /* less optimal, but preserves order */
4562 parse->priv->pending_seeks =
4563 g_slist_append (parse->priv->pending_seeks, seek);
4564 GST_OBJECT_UNLOCK (parse);
4566 res = gst_pad_push_event (parse->sinkpad, new_event);
4569 GST_OBJECT_LOCK (parse);
4570 parse->priv->pending_seeks =
4571 g_slist_remove (parse->priv->pending_seeks, seek);
4572 GST_OBJECT_UNLOCK (parse);
4578 gst_event_unref (event);
4584 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4590 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4596 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4597 "couldn't convert that into TIME format", gst_format_get_name (format));
4603 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4610 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4612 if (taglist == parse->priv->upstream_tags)
4615 if (parse->priv->upstream_tags) {
4616 gst_tag_list_unref (parse->priv->upstream_tags);
4617 parse->priv->upstream_tags = NULL;
4620 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4622 if (taglist != NULL)
4623 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4625 gst_base_parse_check_bitrate_tags (parse);
4630 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4632 GstBaseParse *parse = GST_BASE_PARSE (element);
4634 GST_BASE_PARSE_INDEX_LOCK (parse);
4635 if (parse->priv->index)
4636 gst_object_unref (parse->priv->index);
4638 parse->priv->index = gst_object_ref (index);
4639 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4640 &parse->priv->index_id);
4641 parse->priv->own_index = FALSE;
4643 parse->priv->index = NULL;
4645 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4649 gst_base_parse_get_index (GstElement * element)
4651 GstBaseParse *parse = GST_BASE_PARSE (element);
4652 GstIndex *result = NULL;
4654 GST_BASE_PARSE_INDEX_LOCK (parse);
4655 if (parse->priv->index)
4656 result = gst_object_ref (parse->priv->index);
4657 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4663 static GstStateChangeReturn
4664 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4666 GstBaseParse *parse;
4667 GstStateChangeReturn result;
4669 parse = GST_BASE_PARSE (element);
4671 switch (transition) {
4672 case GST_STATE_CHANGE_READY_TO_PAUSED:
4673 /* If this is our own index destroy it as the
4674 * old entries might be wrong for the new stream */
4675 GST_BASE_PARSE_INDEX_LOCK (parse);
4676 if (parse->priv->own_index) {
4677 gst_object_unref (parse->priv->index);
4678 parse->priv->index = NULL;
4679 parse->priv->own_index = FALSE;
4682 /* If no index was created, generate one */
4683 if (G_UNLIKELY (!parse->priv->index)) {
4684 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4686 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4687 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4688 &parse->priv->index_id);
4689 parse->priv->own_index = TRUE;
4691 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4697 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4699 switch (transition) {
4700 case GST_STATE_CHANGE_PAUSED_TO_READY:
4701 gst_base_parse_reset (parse);
4711 * gst_base_parse_set_ts_at_offset:
4712 * @parse: a #GstBaseParse
4713 * @offset: offset into current buffer
4715 * This function should only be called from a @handle_frame implementation.
4717 * #GstBaseParse creates initial timestamps for frames by using the last
4718 * timestamp seen in the stream before the frame starts. In certain
4719 * cases, the correct timestamps will occur in the stream after the
4720 * start of the frame, but before the start of the actual picture data.
4721 * This function can be used to set the timestamps based on the offset
4722 * into the frame data that the picture starts.
4727 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4729 GstClockTime pts, dts;
4731 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4733 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4734 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4736 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4737 GST_DEBUG_OBJECT (parse,
4738 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4739 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4741 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4742 parse->priv->prev_pts = parse->priv->next_pts = pts;
4744 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4745 parse->priv->prev_dts = parse->priv->next_dts = dts;
4749 * gst_base_parse_merge_tags:
4750 * @parse: a #GstBaseParse
4751 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4752 * previously-set tags
4753 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4755 * Sets the parser subclass's tags and how they should be merged with any
4756 * upstream stream tags. This will override any tags previously-set
4757 * with gst_base_parse_merge_tags().
4759 * Note that this is provided for convenience, and the subclass is
4760 * not required to use this and can still do tag handling on its own.
4765 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4766 GstTagMergeMode mode)
4768 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4769 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4770 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4772 GST_OBJECT_LOCK (parse);
4774 if (tags != parse->priv->parser_tags) {
4775 if (parse->priv->parser_tags) {
4776 gst_tag_list_unref (parse->priv->parser_tags);
4777 parse->priv->parser_tags = NULL;
4778 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4781 parse->priv->parser_tags = gst_tag_list_ref (tags);
4782 parse->priv->parser_tags_merge_mode = mode;
4785 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4786 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4788 gst_base_parse_check_bitrate_tags (parse);
4789 parse->priv->tags_changed = TRUE;
4792 GST_OBJECT_UNLOCK (parse);