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
223 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
224 #define GST_CAT_DEFAULT gst_base_parse_debug
226 /* Supported formats */
227 static const GstFormat fmtlist[] = {
234 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
235 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
237 struct _GstBaseParsePrivate
244 GstFormat duration_fmt;
245 gint64 estimated_duration;
246 gint64 estimated_drift;
248 guint min_frame_size;
249 gboolean disable_passthrough;
250 gboolean passthrough;
251 gboolean pts_interpolate;
254 gboolean has_timing_info;
255 guint fps_num, fps_den;
256 gint update_interval;
258 guint lead_in, lead_out;
259 GstClockTime lead_in_ts, lead_out_ts;
260 GstClockTime min_latency, max_latency;
269 GstClockTime next_pts;
270 GstClockTime next_dts;
271 GstClockTime prev_pts;
272 GstClockTime prev_dts;
273 GstClockTime frame_duration;
274 gboolean seen_keyframe;
280 guint64 data_bytecount;
281 guint64 acc_duration;
282 GstClockTime first_frame_pts;
283 GstClockTime first_frame_dts;
284 gint64 first_frame_offset;
286 gboolean post_min_bitrate;
287 gboolean post_avg_bitrate;
288 gboolean post_max_bitrate;
293 guint posted_avg_bitrate;
295 /* frames/buffers that are queued and ready to go on OK */
296 GQueue queued_frames;
300 /* index entry storage, either ours or provided */
306 /* seek table entries only maintained if upstream is BYTE seekable */
307 gboolean upstream_seekable;
308 gboolean upstream_has_duration;
309 gint64 upstream_size;
310 GstFormat upstream_format;
311 /* minimum distance between two index entries */
312 GstClockTimeDiff idx_interval;
313 guint64 idx_byte_interval;
314 /* ts and offset of last entry added */
315 GstClockTime index_last_ts;
316 gint64 index_last_offset;
317 gboolean index_last_valid;
319 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
320 gboolean exact_position;
321 /* seek events are temporarily kept to match them with newsegments */
322 GSList *pending_seeks;
324 /* reverse playback */
325 GSList *buffers_pending;
326 GSList *buffers_head;
327 GSList *buffers_queued;
328 GSList *buffers_send;
329 GstClockTime last_pts;
330 GstClockTime last_dts;
333 /* Pending serialized events */
334 GList *pending_events;
336 /* If baseparse has checked the caps to identify if it is
337 * handling video or audio */
338 gboolean checked_media;
340 /* offset of last parsed frame/data */
342 /* force a new frame, regardless of offset */
344 /* whether we are merely scanning for a frame */
346 /* ... and resulting frame, if any */
347 GstBaseParseFrame *scanned_frame;
349 /* TRUE if we're still detecting the format, i.e.
350 * if ::detect() is still called for future buffers */
352 GList *detect_buffers;
353 guint detect_buffers_size;
355 /* True when no buffers have been received yet */
356 gboolean first_buffer;
358 /* if TRUE, a STREAM_START event needs to be pushed */
359 gboolean push_stream_start;
361 /* When we need to skip more data than we have currently */
364 /* Tag handling (stream tags only, global tags are passed through as-is) */
365 GstTagList *upstream_tags;
366 GstTagList *parser_tags;
367 GstTagMergeMode parser_tags_merge_mode;
368 gboolean tags_changed;
371 typedef struct _GstBaseParseSeek
376 GstClockTime start_ts;
379 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
384 PROP_DISABLE_PASSTHROUGH,
388 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
389 g_mutex_lock (&parse->priv->index_lock);
390 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
391 g_mutex_unlock (&parse->priv->index_lock);
393 static GstElementClass *parent_class = NULL;
395 static void gst_base_parse_class_init (GstBaseParseClass * klass);
396 static void gst_base_parse_init (GstBaseParse * parse,
397 GstBaseParseClass * klass);
400 gst_base_parse_get_type (void)
402 static volatile gsize base_parse_type = 0;
404 if (g_once_init_enter (&base_parse_type)) {
405 static const GTypeInfo base_parse_info = {
406 sizeof (GstBaseParseClass),
407 (GBaseInitFunc) NULL,
408 (GBaseFinalizeFunc) NULL,
409 (GClassInitFunc) gst_base_parse_class_init,
412 sizeof (GstBaseParse),
414 (GInstanceInitFunc) gst_base_parse_init,
418 _type = g_type_register_static (GST_TYPE_ELEMENT,
419 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
420 g_once_init_leave (&base_parse_type, _type);
422 return (GType) base_parse_type;
425 static void gst_base_parse_finalize (GObject * object);
427 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
428 GstStateChange transition);
429 static void gst_base_parse_reset (GstBaseParse * parse);
432 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
433 static GstIndex *gst_base_parse_get_index (GstElement * element);
436 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
438 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
439 GstObject * parent, GstPadMode mode, gboolean active);
440 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
442 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
443 GstTagList * taglist);
445 static void gst_base_parse_set_property (GObject * object, guint prop_id,
446 const GValue * value, GParamSpec * pspec);
447 static void gst_base_parse_get_property (GObject * object, guint prop_id,
448 GValue * value, GParamSpec * pspec);
450 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
452 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
455 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
457 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
460 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
462 static void gst_base_parse_loop (GstPad * pad);
464 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
465 GstBaseParseFrame * frame);
467 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
470 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
473 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
475 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
478 static void gst_base_parse_drain (GstBaseParse * parse);
480 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
481 GstClockTime time, gboolean before, GstClockTime * _ts);
482 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
483 GstClockTime * _time, gint64 * _offset);
485 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
486 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
488 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
490 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
492 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
494 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
497 gst_base_parse_clear_queues (GstBaseParse * parse)
499 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
500 g_slist_free (parse->priv->buffers_queued);
501 parse->priv->buffers_queued = NULL;
502 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
504 g_slist_free (parse->priv->buffers_pending);
505 parse->priv->buffers_pending = NULL;
506 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
507 g_slist_free (parse->priv->buffers_head);
508 parse->priv->buffers_head = NULL;
509 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
510 g_slist_free (parse->priv->buffers_send);
511 parse->priv->buffers_send = NULL;
513 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
514 g_list_free (parse->priv->detect_buffers);
515 parse->priv->detect_buffers = NULL;
516 parse->priv->detect_buffers_size = 0;
518 g_queue_foreach (&parse->priv->queued_frames,
519 (GFunc) gst_base_parse_frame_free, NULL);
520 g_queue_clear (&parse->priv->queued_frames);
522 gst_buffer_replace (&parse->priv->cache, NULL);
524 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
525 g_list_free (parse->priv->pending_events);
526 parse->priv->pending_events = NULL;
528 parse->priv->checked_media = FALSE;
532 gst_base_parse_finalize (GObject * object)
534 GstBaseParse *parse = GST_BASE_PARSE (object);
536 g_object_unref (parse->priv->adapter);
538 if (parse->priv->index) {
539 gst_object_unref (parse->priv->index);
540 parse->priv->index = NULL;
542 g_mutex_clear (&parse->priv->index_lock);
544 gst_base_parse_clear_queues (parse);
546 G_OBJECT_CLASS (parent_class)->finalize (object);
550 gst_base_parse_class_init (GstBaseParseClass * klass)
552 GObjectClass *gobject_class;
553 GstElementClass *gstelement_class;
555 gobject_class = G_OBJECT_CLASS (klass);
556 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
557 parent_class = g_type_class_peek_parent (klass);
559 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
560 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
561 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
564 * GstBaseParse:disable-passthrough:
566 * If set to %TRUE, baseparse will unconditionally force parsing of the
567 * incoming data. This can be required in the rare cases where the incoming
568 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
569 * force validation and parsing of the incoming data.
570 * If set to %FALSE, decision of whether to parse the data or not is up to
571 * the implementation (standard behaviour).
573 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
574 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
575 "Force processing (disables passthrough)",
576 DEFAULT_DISABLE_PASSTHROUGH,
577 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
579 gstelement_class = (GstElementClass *) klass;
580 gstelement_class->change_state =
581 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
584 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
585 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
588 /* Default handlers */
589 klass->sink_event = gst_base_parse_sink_event_default;
590 klass->src_event = gst_base_parse_src_event_default;
591 klass->sink_query = gst_base_parse_sink_query_default;
592 klass->src_query = gst_base_parse_src_query_default;
593 klass->convert = gst_base_parse_convert_default;
595 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
596 "baseparse element");
600 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
602 GstPadTemplate *pad_template;
604 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
606 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
609 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
610 g_return_if_fail (pad_template != NULL);
611 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
612 gst_pad_set_event_function (parse->sinkpad,
613 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
614 gst_pad_set_query_function (parse->sinkpad,
615 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
616 gst_pad_set_chain_function (parse->sinkpad,
617 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
618 gst_pad_set_activate_function (parse->sinkpad,
619 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
620 gst_pad_set_activatemode_function (parse->sinkpad,
621 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
622 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
623 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
625 GST_DEBUG_OBJECT (parse, "sinkpad created");
628 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
629 g_return_if_fail (pad_template != NULL);
630 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
631 gst_pad_set_event_function (parse->srcpad,
632 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
633 gst_pad_set_query_function (parse->srcpad,
634 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
635 gst_pad_use_fixed_caps (parse->srcpad);
636 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
637 GST_DEBUG_OBJECT (parse, "src created");
639 g_queue_init (&parse->priv->queued_frames);
641 parse->priv->adapter = gst_adapter_new ();
643 parse->priv->pad_mode = GST_PAD_MODE_NONE;
645 g_mutex_init (&parse->priv->index_lock);
648 gst_base_parse_reset (parse);
649 GST_DEBUG_OBJECT (parse, "init ok");
651 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
653 parse->priv->upstream_tags = NULL;
654 parse->priv->parser_tags = NULL;
655 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
659 gst_base_parse_set_property (GObject * object, guint prop_id,
660 const GValue * value, GParamSpec * pspec)
662 GstBaseParse *parse = GST_BASE_PARSE (object);
665 case PROP_DISABLE_PASSTHROUGH:
666 parse->priv->disable_passthrough = g_value_get_boolean (value);
669 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
675 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
678 GstBaseParse *parse = GST_BASE_PARSE (object);
681 case PROP_DISABLE_PASSTHROUGH:
682 g_value_set_boolean (value, parse->priv->disable_passthrough);
685 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
690 static GstBaseParseFrame *
691 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
693 GstBaseParseFrame *copy;
695 copy = g_slice_dup (GstBaseParseFrame, frame);
696 copy->buffer = gst_buffer_ref (frame->buffer);
697 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
699 GST_TRACE ("copied frame %p -> %p", frame, copy);
705 gst_base_parse_frame_free (GstBaseParseFrame * frame)
707 GST_TRACE ("freeing frame %p", frame);
710 gst_buffer_unref (frame->buffer);
711 frame->buffer = NULL;
714 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
715 g_slice_free (GstBaseParseFrame, frame);
717 memset (frame, 0, sizeof (*frame));
721 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
722 (GBoxedCopyFunc) gst_base_parse_frame_copy,
723 (GBoxedFreeFunc) gst_base_parse_frame_free);
726 * gst_base_parse_frame_init:
727 * @frame: #GstBaseParseFrame.
729 * Sets a #GstBaseParseFrame to initial state. Currently this means
730 * all public fields are zero-ed and a private flag is set to make
731 * sure gst_base_parse_frame_free() only frees the contents but not
732 * the actual frame. Use this function to initialise a #GstBaseParseFrame
733 * allocated on the stack.
736 gst_base_parse_frame_init (GstBaseParseFrame * frame)
738 memset (frame, 0, sizeof (GstBaseParseFrame));
739 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
740 GST_TRACE ("inited frame %p", frame);
744 * gst_base_parse_frame_new:
745 * @buffer: (transfer none): a #GstBuffer
747 * @overhead: number of bytes in this frame which should be counted as
748 * metadata overhead, ie. not used to calculate the average bitrate.
749 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
751 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
752 * elements written in C should usually allocate the frame on the stack and
753 * then use gst_base_parse_frame_init() to initialise it.
755 * Returns: a newly-allocated #GstBaseParseFrame. Free with
756 * gst_base_parse_frame_free() when no longer needed.
759 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
762 GstBaseParseFrame *frame;
764 frame = g_slice_new0 (GstBaseParseFrame);
765 frame->buffer = gst_buffer_ref (buffer);
767 GST_TRACE ("created frame %p", frame);
772 gst_base_parse_update_flags (GstBaseParse * parse)
776 /* set flags one by one for clarity */
777 if (G_UNLIKELY (parse->priv->drain))
778 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
780 /* losing sync is pretty much a discont (and vice versa), no ? */
781 if (G_UNLIKELY (parse->priv->discont))
782 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
786 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
788 if (G_UNLIKELY (parse->priv->discont)) {
789 GST_DEBUG_OBJECT (parse, "marking DISCONT");
790 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
793 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
794 GST_LOG_OBJECT (parse, "marking as new frame");
795 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
798 frame->offset = parse->priv->prev_offset = parse->priv->offset;
802 gst_base_parse_reset (GstBaseParse * parse)
804 GST_OBJECT_LOCK (parse);
805 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
806 parse->priv->duration = -1;
807 parse->priv->min_frame_size = 1;
808 parse->priv->discont = TRUE;
809 parse->priv->flushing = FALSE;
810 parse->priv->saw_gaps = FALSE;
811 parse->priv->offset = 0;
812 parse->priv->sync_offset = 0;
813 parse->priv->update_interval = -1;
814 parse->priv->fps_num = parse->priv->fps_den = 0;
815 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
816 parse->priv->lead_in = parse->priv->lead_out = 0;
817 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
818 parse->priv->bitrate = 0;
819 parse->priv->framecount = 0;
820 parse->priv->bytecount = 0;
821 parse->priv->acc_duration = 0;
822 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
823 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
824 parse->priv->first_frame_offset = -1;
825 parse->priv->estimated_duration = -1;
826 parse->priv->estimated_drift = 0;
827 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
828 parse->priv->next_dts = 0;
829 parse->priv->syncable = TRUE;
830 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
831 parse->priv->passthrough = FALSE;
832 parse->priv->pts_interpolate = TRUE;
833 parse->priv->infer_ts = TRUE;
834 parse->priv->has_timing_info = FALSE;
835 parse->priv->min_bitrate = G_MAXUINT;
836 parse->priv->max_bitrate = 0;
837 parse->priv->avg_bitrate = 0;
838 parse->priv->posted_avg_bitrate = 0;
840 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
841 parse->priv->index_last_offset = -1;
842 parse->priv->index_last_valid = TRUE;
843 parse->priv->upstream_seekable = FALSE;
844 parse->priv->upstream_size = 0;
845 parse->priv->upstream_has_duration = FALSE;
846 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
847 parse->priv->idx_interval = 0;
848 parse->priv->idx_byte_interval = 0;
849 parse->priv->exact_position = TRUE;
850 parse->priv->seen_keyframe = FALSE;
851 parse->priv->checked_media = FALSE;
853 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
854 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
855 parse->priv->last_offset = 0;
857 parse->priv->skip = 0;
859 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
861 g_list_free (parse->priv->pending_events);
862 parse->priv->pending_events = NULL;
864 if (parse->priv->cache) {
865 gst_buffer_unref (parse->priv->cache);
866 parse->priv->cache = NULL;
869 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
870 g_slist_free (parse->priv->pending_seeks);
871 parse->priv->pending_seeks = NULL;
873 if (parse->priv->adapter)
874 gst_adapter_clear (parse->priv->adapter);
876 gst_base_parse_set_upstream_tags (parse, NULL);
878 if (parse->priv->parser_tags) {
879 gst_tag_list_unref (parse->priv->parser_tags);
880 parse->priv->parser_tags = NULL;
882 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
884 parse->priv->new_frame = TRUE;
886 parse->priv->first_buffer = TRUE;
888 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
889 g_list_free (parse->priv->detect_buffers);
890 parse->priv->detect_buffers = NULL;
891 parse->priv->detect_buffers_size = 0;
892 GST_OBJECT_UNLOCK (parse);
896 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
898 gboolean got_tag = FALSE;
901 if (parse->priv->upstream_tags != NULL)
902 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
904 if (!got_tag && parse->priv->parser_tags != NULL)
905 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
910 /* check if upstream or subclass tags contain bitrates already */
912 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
914 parse->priv->post_min_bitrate =
915 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
916 parse->priv->post_avg_bitrate =
917 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
918 parse->priv->post_max_bitrate =
919 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
922 /* Queues new tag event with the current combined state of the stream tags
923 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
925 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
927 GstTagList *merged_tags;
929 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
930 parse->priv->upstream_tags);
931 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
932 parse->priv->parser_tags);
933 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
936 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
937 parse->priv->parser_tags_merge_mode);
939 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
941 if (merged_tags == NULL)
944 if (gst_tag_list_is_empty (merged_tags)) {
945 gst_tag_list_unref (merged_tags);
949 /* only add bitrate tags to non-empty taglists for now, and only if neither
950 * upstream tags nor the subclass sets the bitrate tag in question already */
951 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
952 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
953 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MINIMUM_BITRATE,
954 parse->priv->min_bitrate, NULL);
956 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
957 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
958 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MAXIMUM_BITRATE,
959 parse->priv->max_bitrate, NULL);
961 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
962 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
963 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
964 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_BITRATE,
965 parse->priv->avg_bitrate, NULL);
968 parse->priv->pending_events =
969 g_list_prepend (parse->priv->pending_events,
970 gst_event_new_tag (merged_tags));
973 /* gst_base_parse_parse_frame:
974 * @parse: #GstBaseParse.
975 * @buffer: #GstBuffer.
977 * Default callback for parse_frame.
980 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
982 GstBuffer *buffer = frame->buffer;
984 /* Avoid updating timestamps of header buffers */
985 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
986 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
987 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
988 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
990 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
991 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
992 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
994 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
995 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
996 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 /* Only update the tag on a 10 kbps delta */
1698 static const gint update_threshold = 10000;
1700 guint64 data_len, frame_dur;
1701 gint overhead, frame_bitrate, old_avg_bitrate;
1702 GstBuffer *buffer = frame->buffer;
1704 overhead = frame->overhead;
1708 data_len = gst_buffer_get_size (buffer) - overhead;
1709 parse->priv->data_bytecount += data_len;
1711 /* duration should be valid by now,
1712 * either set by subclass or maybe based on fps settings */
1713 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1714 /* Calculate duration of a frame from buffer properties */
1715 frame_dur = GST_BUFFER_DURATION (buffer);
1716 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1717 parse->priv->acc_duration;
1720 /* No way to figure out frame duration (is this even possible?) */
1724 /* override if subclass provided bitrate, e.g. metadata based */
1725 if (parse->priv->bitrate) {
1726 parse->priv->avg_bitrate = parse->priv->bitrate;
1727 /* spread this (confirmed) info ASAP */
1728 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1729 parse->priv->tags_changed = TRUE;
1733 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1737 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1738 parse->priv->avg_bitrate);
1740 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1743 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1744 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1745 || parse->priv->post_max_bitrate))
1746 parse->priv->tags_changed = TRUE;
1748 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1749 if (frame_bitrate < parse->priv->min_bitrate) {
1750 parse->priv->min_bitrate = frame_bitrate;
1751 if (parse->priv->post_min_bitrate)
1752 parse->priv->tags_changed = TRUE;
1755 if (frame_bitrate > parse->priv->max_bitrate) {
1756 parse->priv->max_bitrate = frame_bitrate;
1757 if (parse->priv->post_max_bitrate)
1758 parse->priv->tags_changed = TRUE;
1761 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1762 if (((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1763 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1764 update_threshold) && parse->priv->post_avg_bitrate)
1765 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;
2886 parse = GST_BASE_PARSE (parent);
2887 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2888 GST_DEBUG_OBJECT (parent, "chain");
2890 is_header = buffer && GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER);
2892 /* early out for speed, if we need to skip */
2893 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
2894 parse->priv->skip = 0;
2895 if (parse->priv->skip > 0) {
2896 gsize bsize = gst_buffer_get_size (buffer);
2897 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2899 if (parse->priv->skip >= bsize) {
2900 parse->priv->skip -= bsize;
2901 GST_DEBUG ("All the buffer is skipped");
2902 parse->priv->offset += bsize;
2903 parse->priv->sync_offset = parse->priv->offset;
2906 buffer = gst_buffer_make_writable (buffer);
2907 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2908 parse->priv->offset += parse->priv->skip;
2909 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2910 (unsigned) (bsize - parse->priv->skip));
2911 parse->priv->skip = 0;
2912 parse->priv->discont = TRUE;
2915 if (G_UNLIKELY (parse->priv->first_buffer)) {
2916 parse->priv->first_buffer = FALSE;
2917 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2918 /* this stream has no header buffers, check if we just prepend the
2919 * streamheader from caps to the stream */
2920 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2921 "prepend to the stream");
2922 gst_base_parse_process_streamheader (parse);
2924 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2925 "streamheader from caps");
2929 if (parse->priv->detecting) {
2930 GstBuffer *detect_buf;
2932 if (parse->priv->detect_buffers_size == 0) {
2933 detect_buf = gst_buffer_ref (buffer);
2938 detect_buf = gst_buffer_new ();
2940 for (l = parse->priv->detect_buffers; l; l = l->next) {
2941 gsize tmpsize = gst_buffer_get_size (l->data);
2943 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2944 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2948 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2949 offset, gst_buffer_get_size (buffer));
2952 ret = bclass->detect (parse, detect_buf);
2953 gst_buffer_unref (detect_buf);
2955 if (ret == GST_FLOW_OK) {
2958 /* Detected something */
2959 parse->priv->detecting = FALSE;
2961 for (l = parse->priv->detect_buffers; l; l = l->next) {
2962 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2964 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2965 parent, GST_BUFFER_CAST (l->data));
2967 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2969 g_list_free (parse->priv->detect_buffers);
2970 parse->priv->detect_buffers = NULL;
2971 parse->priv->detect_buffers_size = 0;
2973 if (ret != GST_FLOW_OK) {
2977 /* Handle the current buffer */
2978 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2979 /* Still detecting, append buffer or error out if draining */
2981 if (parse->priv->drain) {
2982 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2983 return GST_FLOW_ERROR;
2984 } else if (parse->priv->flushing) {
2985 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2987 g_list_free (parse->priv->detect_buffers);
2988 parse->priv->detect_buffers = NULL;
2989 parse->priv->detect_buffers_size = 0;
2991 parse->priv->detect_buffers =
2992 g_list_append (parse->priv->detect_buffers, buffer);
2993 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2997 /* Something went wrong, subclass responsible for error reporting */
3001 /* And now handle the current buffer if detection worked */
3004 if (G_LIKELY (buffer)) {
3005 GST_LOG_OBJECT (parse,
3006 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3007 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3008 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3009 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3010 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3012 if (G_UNLIKELY (!parse->priv->disable_passthrough
3013 && parse->priv->passthrough)) {
3014 GstBaseParseFrame frame;
3016 gst_base_parse_frame_init (&frame);
3017 frame.buffer = gst_buffer_make_writable (buffer);
3018 ret = gst_base_parse_push_frame (parse, &frame);
3019 gst_base_parse_frame_free (&frame);
3022 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3023 /* upstream feeding us in reverse playback;
3024 * finish previous fragment and start new upon DISCONT */
3025 if (parse->segment.rate < 0.0) {
3026 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3027 ret = gst_base_parse_finish_fragment (parse, TRUE);
3028 gst_base_parse_start_fragment (parse);
3030 /* discont in the stream, drain and mark discont for next output */
3031 gst_base_parse_drain (parse);
3032 parse->priv->discont = TRUE;
3035 gst_adapter_push (parse->priv->adapter, buffer);
3038 /* Parse and push as many frames as possible */
3039 /* Stop either when adapter is empty or we are flushing */
3040 while (!parse->priv->flushing) {
3043 /* note: if subclass indicates MAX fsize,
3044 * this will not likely be available anyway ... */
3045 min_size = MAX (parse->priv->min_frame_size, fsize);
3046 av = gst_adapter_available (parse->priv->adapter);
3048 if (G_UNLIKELY (parse->priv->drain)) {
3050 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3051 if (G_UNLIKELY (!min_size)) {
3056 /* Collect at least min_frame_size bytes */
3057 if (av < min_size) {
3058 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3062 /* move along with upstream timestamp (if any),
3063 * but interpolate in between */
3064 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3065 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3066 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
3067 parse->priv->prev_pts = parse->priv->next_pts = pts;
3069 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
3070 parse->priv->prev_dts = parse->priv->next_dts = dts;
3072 /* we can mess with, erm interpolate, timestamps,
3073 * and incoming stuff has PTS but no DTS seen so far,
3074 * then pick up DTS from PTS and hope for the best ... */
3075 if (parse->priv->infer_ts &&
3076 parse->priv->pts_interpolate &&
3077 !GST_CLOCK_TIME_IS_VALID (dts) &&
3078 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
3079 GST_CLOCK_TIME_IS_VALID (pts))
3080 parse->priv->next_dts = pts;
3082 /* always pass all available data */
3083 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3085 /* already inform subclass what timestamps we have planned,
3086 * at least if provided by time-based upstream */
3087 if (parse->priv->upstream_format == GST_FORMAT_TIME && !is_header) {
3088 tmpbuf = gst_buffer_make_writable (tmpbuf);
3089 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3090 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3091 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3094 /* keep the adapter mapped, so keep track of what has to be flushed */
3095 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3098 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3101 if (skip == 0 && flush == 0) {
3102 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3103 "breaking to get more data");
3104 /* ignore this return as it produced no data */
3112 GST_LOG_OBJECT (parse, "chain leaving");
3116 /* pull @size bytes at current offset,
3117 * i.e. at least try to and possibly return a shorter buffer if near the end */
3118 static GstFlowReturn
3119 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3120 GstBuffer ** buffer)
3122 GstFlowReturn ret = GST_FLOW_OK;
3124 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3126 /* Caching here actually makes much less difference than one would expect.
3127 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3128 if (parse->priv->cache) {
3129 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3130 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3132 if (cache_offset <= parse->priv->offset &&
3133 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3134 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3135 parse->priv->offset - cache_offset, size);
3136 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3139 /* not enough data in the cache, free cache and get a new one */
3140 gst_buffer_unref (parse->priv->cache);
3141 parse->priv->cache = NULL;
3144 /* refill the cache */
3146 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3147 64 * 1024), &parse->priv->cache);
3148 if (ret != GST_FLOW_OK) {
3149 parse->priv->cache = NULL;
3153 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3155 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3157 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3161 /* Not possible to get enough data, try a last time with
3162 * requesting exactly the size we need */
3163 gst_buffer_unref (parse->priv->cache);
3164 parse->priv->cache = NULL;
3166 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3167 &parse->priv->cache);
3169 if (ret != GST_FLOW_OK) {
3170 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3175 if (gst_buffer_get_size (parse->priv->cache) < size) {
3176 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3177 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3178 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3180 *buffer = parse->priv->cache;
3181 parse->priv->cache = NULL;
3187 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3188 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3193 static GstFlowReturn
3194 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3197 GstClockTime ts = 0;
3201 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3202 ", last_offset = %" G_GINT64_FORMAT,
3203 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3205 if (!parse->priv->last_offset
3206 || parse->priv->last_pts <= parse->segment.start) {
3207 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3208 GST_TIME_ARGS (parse->segment.start));
3213 /* last fragment started at last_offset / last_ts;
3214 * seek back 10s capped at 1MB */
3215 if (parse->priv->last_pts >= 10 * GST_SECOND)
3216 ts = parse->priv->last_pts - 10 * GST_SECOND;
3217 /* if we are exact now, we will be more so going backwards */
3218 if (parse->priv->exact_position) {
3219 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3221 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3222 GST_FORMAT_BYTES, &offset)) {
3223 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3226 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3227 parse->priv->last_offset - 1024);
3228 offset = MAX (0, offset);
3230 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3232 parse->priv->offset = offset;
3234 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3236 if (ret != GST_FLOW_OK)
3239 /* offset will increase again as fragment is processed/parsed */
3240 parse->priv->last_offset = offset;
3242 gst_base_parse_start_fragment (parse);
3243 gst_adapter_push (parse->priv->adapter, buffer);
3244 ret = gst_base_parse_finish_fragment (parse, TRUE);
3245 if (ret != GST_FLOW_OK)
3248 /* force previous fragment */
3249 parse->priv->offset = -1;
3256 * pull and scan for next frame starting from current offset
3257 * ajusts sync, drain and offset going along */
3258 static GstFlowReturn
3259 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3262 GstFlowReturn ret = GST_FLOW_OK;
3263 guint fsize, min_size;
3267 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3268 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3270 /* let's make this efficient for all subclass once and for all;
3271 * maybe it does not need this much, but in the latter case, we know we are
3272 * in pull mode here and might as well try to read and supply more anyway
3273 * (so does the buffer caching mechanism) */
3277 min_size = MAX (parse->priv->min_frame_size, fsize);
3279 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3281 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3282 if (ret != GST_FLOW_OK)
3285 /* if we got a short read, inform subclass we are draining leftover
3286 * and no more is to be expected */
3287 if (gst_buffer_get_size (buffer) < min_size) {
3288 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3289 parse->priv->drain = TRUE;
3292 if (parse->priv->detecting) {
3293 ret = klass->detect (parse, buffer);
3294 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3295 /* If draining we error out, otherwise request a buffer
3297 if (parse->priv->drain) {
3298 gst_buffer_unref (buffer);
3299 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3300 return GST_FLOW_ERROR;
3303 gst_buffer_unref (buffer);
3306 } else if (ret != GST_FLOW_OK) {
3307 gst_buffer_unref (buffer);
3308 GST_ERROR_OBJECT (parse, "detect() returned %s",
3309 gst_flow_get_name (ret));
3313 /* Else handle this buffer normally */
3316 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3317 if (ret != GST_FLOW_OK)
3320 /* If a large amount of data was requested to be skipped, _handle_buffer
3321 might have set the priv->skip flag to an extra amount on top of skip.
3322 In pull mode, we can just pull from the new offset directly. */
3323 parse->priv->offset += parse->priv->skip;
3324 parse->priv->skip = 0;
3326 /* something flushed means something happened,
3327 * and we should bail out of this loop so as not to occupy
3328 * the task thread indefinitely */
3330 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3333 /* nothing flushed, no skip and draining, so nothing left to do */
3334 if (!skip && parse->priv->drain) {
3335 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3336 "breaking loop and marking EOS");
3340 /* otherwise, get some more data
3341 * note that is checked this does not happen indefinitely */
3343 GST_LOG_OBJECT (parse, "getting some more data");
3346 parse->priv->drain = FALSE;
3353 /* Loop that is used in pull mode to retrieve data from upstream */
3355 gst_base_parse_loop (GstPad * pad)
3357 GstBaseParse *parse;
3358 GstBaseParseClass *klass;
3359 GstFlowReturn ret = GST_FLOW_OK;
3361 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3362 klass = GST_BASE_PARSE_GET_CLASS (parse);
3364 GST_LOG_OBJECT (parse, "Entering parse loop");
3366 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3371 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3374 event = gst_event_new_stream_start (stream_id);
3375 gst_event_set_group_id (event, gst_util_group_id_next ());
3377 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3378 gst_pad_push_event (parse->srcpad, event);
3379 parse->priv->push_stream_start = FALSE;
3383 /* reverse playback:
3384 * first fragment (closest to stop time) is handled normally below,
3385 * then we pull in fragments going backwards */
3386 if (parse->segment.rate < 0.0) {
3387 /* check if we jumped back to a previous fragment,
3388 * which is a post-first fragment */
3389 if (parse->priv->offset < 0) {
3390 ret = gst_base_parse_handle_previous_fragment (parse);
3395 ret = gst_base_parse_scan_frame (parse, klass);
3397 /* eat expected eos signalling past segment in reverse playback */
3398 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3399 parse->segment.position >= parse->segment.stop) {
3400 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3401 /* push what was accumulated during loop run */
3402 gst_base_parse_finish_fragment (parse, FALSE);
3403 /* force previous fragment */
3404 parse->priv->offset = -1;
3408 if (ret != GST_FLOW_OK)
3412 if (ret == GST_FLOW_EOS)
3414 else if (ret != GST_FLOW_OK)
3417 gst_object_unref (parse);
3424 GST_DEBUG_OBJECT (parse, "eos");
3429 gboolean push_eos = FALSE;
3431 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3432 gst_flow_get_name (ret));
3433 gst_pad_pause_task (parse->sinkpad);
3435 if (ret == GST_FLOW_EOS) {
3436 /* handle end-of-stream/segment */
3437 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3440 if ((stop = parse->segment.stop) == -1)
3441 stop = parse->segment.duration;
3443 GST_DEBUG_OBJECT (parse, "sending segment_done");
3445 gst_element_post_message
3446 (GST_ELEMENT_CAST (parse),
3447 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3448 GST_FORMAT_TIME, stop));
3449 gst_pad_push_event (parse->srcpad,
3450 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3452 /* If we STILL have zero frames processed, fire an error */
3453 if (parse->priv->framecount == 0) {
3454 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3455 ("No valid frames found before end of stream"), (NULL));
3459 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3460 /* for fatal errors we post an error message, wrong-state is
3461 * not fatal because it happens due to flushes and only means
3462 * that we should stop now. */
3463 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3464 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3468 if (parse->priv->estimated_duration <= 0) {
3469 gst_base_parse_update_duration (parse);
3471 /* Push pending events, including SEGMENT events */
3472 gst_base_parse_push_pending_events (parse);
3474 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3476 gst_object_unref (parse);
3481 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3483 GstSchedulingFlags sched_flags;
3484 GstBaseParse *parse;
3488 parse = GST_BASE_PARSE (parent);
3490 GST_DEBUG_OBJECT (parse, "sink activate");
3492 query = gst_query_new_scheduling ();
3493 if (!gst_pad_peer_query (sinkpad, query)) {
3494 gst_query_unref (query);
3495 goto baseparse_push;
3498 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3500 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3501 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3503 gst_query_unref (query);
3506 goto baseparse_push;
3508 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3509 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3510 goto baseparse_push;
3512 parse->priv->push_stream_start = TRUE;
3514 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3519 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3520 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3525 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3527 GstBaseParseClass *klass;
3528 gboolean result = TRUE;
3530 GST_DEBUG_OBJECT (parse, "activate %d", active);
3532 klass = GST_BASE_PARSE_GET_CLASS (parse);
3535 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3536 result = klass->start (parse);
3538 /* If the subclass implements ::detect we want to
3539 * call it for the first buffers now */
3540 parse->priv->detecting = (klass->detect != NULL);
3542 /* We must make sure streaming has finished before resetting things
3543 * and calling the ::stop vfunc */
3544 GST_PAD_STREAM_LOCK (parse->sinkpad);
3545 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3547 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3548 result = klass->stop (parse);
3550 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3552 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3557 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3558 GstPadMode mode, gboolean active)
3561 GstBaseParse *parse;
3563 parse = GST_BASE_PARSE (parent);
3565 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3566 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3568 if (!gst_base_parse_activate (parse, active))
3569 goto activate_failed;
3572 case GST_PAD_MODE_PULL:
3574 parse->priv->pending_events =
3575 g_list_prepend (parse->priv->pending_events,
3576 gst_event_new_segment (&parse->segment));
3579 result = gst_pad_stop_task (pad);
3587 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3589 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3596 GST_DEBUG_OBJECT (parse, "activate failed");
3602 * gst_base_parse_set_duration:
3603 * @parse: #GstBaseParse.
3605 * @duration: duration value.
3606 * @interval: how often to update the duration estimate based on bitrate, or 0.
3608 * Sets the duration of the currently playing media. Subclass can use this
3609 * when it is able to determine duration and/or notices a change in the media
3610 * duration. Alternatively, if @interval is non-zero (default), then stream
3611 * duration is determined based on estimated bitrate, and updated every @interval
3615 gst_base_parse_set_duration (GstBaseParse * parse,
3616 GstFormat fmt, gint64 duration, gint interval)
3618 g_return_if_fail (parse != NULL);
3620 if (parse->priv->upstream_has_duration) {
3621 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3625 if (duration != parse->priv->duration) {
3628 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3629 gst_element_post_message (GST_ELEMENT (parse), m);
3631 /* TODO: what about duration tag? */
3633 parse->priv->duration = duration;
3634 parse->priv->duration_fmt = fmt;
3635 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3636 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3637 if (interval != 0) {
3638 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3642 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3643 parse->priv->update_interval = interval;
3649 * gst_base_parse_set_average_bitrate:
3650 * @parse: #GstBaseParse.
3651 * @bitrate: average bitrate in bits/second
3653 * Optionally sets the average bitrate detected in media (if non-zero),
3654 * e.g. based on metadata, as it will be posted to the application.
3656 * By default, announced average bitrate is estimated. The average bitrate
3657 * is used to estimate the total duration of the stream and to estimate
3658 * a seek position, if there's no index and the format is syncable
3659 * (see gst_base_parse_set_syncable()).
3662 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3664 parse->priv->bitrate = bitrate;
3665 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3669 * gst_base_parse_set_min_frame_size:
3670 * @parse: #GstBaseParse.
3671 * @min_size: Minimum size of the data that this base class should give to
3674 * Subclass can use this function to tell the base class that it needs to
3675 * give at least #min_size buffers.
3678 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3680 g_return_if_fail (parse != NULL);
3682 parse->priv->min_frame_size = min_size;
3683 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3687 * gst_base_parse_set_frame_rate:
3688 * @parse: the #GstBaseParse to set
3689 * @fps_num: frames per second (numerator).
3690 * @fps_den: frames per second (denominator).
3691 * @lead_in: frames needed before a segment for subsequent decode
3692 * @lead_out: frames needed after a segment
3694 * If frames per second is configured, parser can take care of buffer duration
3695 * and timestamping. When performing segment clipping, or seeking to a specific
3696 * location, a corresponding decoder might need an initial @lead_in and a
3697 * following @lead_out number of frames to ensure the desired segment is
3698 * entirely filled upon decoding.
3701 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3702 guint fps_den, guint lead_in, guint lead_out)
3704 g_return_if_fail (parse != NULL);
3706 parse->priv->fps_num = fps_num;
3707 parse->priv->fps_den = fps_den;
3708 if (!fps_num || !fps_den) {
3709 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3711 fps_num = fps_den = 0;
3712 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3713 parse->priv->lead_in = parse->priv->lead_out = 0;
3714 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3716 parse->priv->frame_duration =
3717 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3718 parse->priv->lead_in = lead_in;
3719 parse->priv->lead_out = lead_out;
3720 parse->priv->lead_in_ts =
3721 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3722 parse->priv->lead_out_ts =
3723 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3724 /* aim for about 1.5s to estimate duration */
3725 if (parse->priv->update_interval < 0) {
3726 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3727 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3728 parse->priv->update_interval);
3731 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3732 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3733 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3734 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3735 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3736 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3740 * gst_base_parse_set_has_timing_info:
3741 * @parse: a #GstBaseParse
3742 * @has_timing: whether frames carry timing information
3744 * Set if frames carry timing information which the subclass can (generally)
3745 * parse and provide. In particular, intrinsic (rather than estimated) time
3746 * can be obtained following a seek.
3749 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3751 parse->priv->has_timing_info = has_timing;
3752 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3756 * gst_base_parse_set_syncable:
3757 * @parse: a #GstBaseParse
3758 * @syncable: set if frame starts can be identified
3760 * Set if frame starts can be identified. This is set by default and
3761 * determines whether seeking based on bitrate averages
3762 * is possible for a format/stream.
3765 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3767 parse->priv->syncable = syncable;
3768 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3772 * gst_base_parse_set_passthrough:
3773 * @parse: a #GstBaseParse
3774 * @passthrough: %TRUE if parser should run in passthrough mode
3776 * Set if the nature of the format or configuration does not allow (much)
3777 * parsing, and the parser should operate in passthrough mode (which only
3778 * applies when operating in push mode). That is, incoming buffers are
3779 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3780 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3781 * so subclass can perform as much or as little is appropriate for
3782 * passthrough semantics in @pre_push_frame.
3785 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3787 parse->priv->passthrough = passthrough;
3788 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3792 * gst_base_parse_set_pts_interpolation:
3793 * @parse: a #GstBaseParse
3794 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3796 * By default, the base class will guess PTS timestamps using a simple
3797 * interpolation (previous timestamp + duration), which is incorrect for
3798 * data streams with reordering, where PTS can go backward. Sub-classes
3799 * implementing such formats should disable PTS interpolation.
3802 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3803 gboolean pts_interpolate)
3805 parse->priv->pts_interpolate = pts_interpolate;
3806 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3807 (pts_interpolate) ? "yes" : "no");
3811 * gst_base_parse_set_infer_ts:
3812 * @parse: a #GstBaseParse
3813 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3815 * By default, the base class might try to infer PTS from DTS and vice
3816 * versa. While this is generally correct for audio data, it may not
3817 * be otherwise. Sub-classes implementing such formats should disable
3818 * timestamp inferring.
3821 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3823 parse->priv->infer_ts = infer_ts;
3824 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3828 * gst_base_parse_set_latency:
3829 * @parse: a #GstBaseParse
3830 * @min_latency: minimum parse latency
3831 * @max_latency: maximum parse latency
3833 * Sets the minimum and maximum (which may likely be equal) latency introduced
3834 * by the parsing process. If there is such a latency, which depends on the
3835 * particular parsing of the format, it typically corresponds to 1 frame duration.
3838 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3839 GstClockTime max_latency)
3841 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3842 g_return_if_fail (min_latency <= max_latency);
3844 GST_OBJECT_LOCK (parse);
3845 parse->priv->min_latency = min_latency;
3846 parse->priv->max_latency = max_latency;
3847 GST_OBJECT_UNLOCK (parse);
3848 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3849 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3850 GST_TIME_ARGS (max_latency));
3854 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3855 GstClockTime * duration)
3857 gboolean res = FALSE;
3859 g_return_val_if_fail (duration != NULL, FALSE);
3861 *duration = GST_CLOCK_TIME_NONE;
3862 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3863 GST_LOG_OBJECT (parse, "using provided duration");
3864 *duration = parse->priv->duration;
3866 } else if (parse->priv->duration != -1) {
3867 GST_LOG_OBJECT (parse, "converting provided duration");
3868 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3869 parse->priv->duration, format, (gint64 *) duration);
3870 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3871 GST_LOG_OBJECT (parse, "using estimated duration");
3872 *duration = parse->priv->estimated_duration;
3875 GST_LOG_OBJECT (parse, "cannot estimate duration");
3878 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3879 GST_TIME_ARGS (*duration));
3884 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3886 gboolean res = FALSE;
3889 pad = GST_BASE_PARSE_SRC_PAD (parse);
3891 switch (GST_QUERY_TYPE (query)) {
3892 case GST_QUERY_POSITION:
3897 GST_DEBUG_OBJECT (parse, "position query");
3898 gst_query_parse_position (query, &format, NULL);
3900 /* try upstream first */
3901 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3903 /* Fall back on interpreting segment */
3904 GST_OBJECT_LOCK (parse);
3905 if (format == GST_FORMAT_BYTES) {
3906 dest_value = parse->priv->offset;
3908 } else if (format == parse->segment.format &&
3909 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3910 dest_value = gst_segment_to_stream_time (&parse->segment,
3911 parse->segment.format, parse->segment.position);
3914 GST_OBJECT_UNLOCK (parse);
3916 /* no precise result, upstream no idea either, then best estimate */
3917 /* priv->offset is updated in both PUSH/PULL modes */
3918 res = gst_base_parse_convert (parse,
3919 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3922 gst_query_set_position (query, format, dest_value);
3926 case GST_QUERY_DURATION:
3929 GstClockTime duration;
3931 GST_DEBUG_OBJECT (parse, "duration query");
3932 gst_query_parse_duration (query, &format, NULL);
3934 /* consult upstream */
3935 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3937 /* otherwise best estimate from us */
3939 res = gst_base_parse_get_duration (parse, format, &duration);
3941 gst_query_set_duration (query, format, duration);
3945 case GST_QUERY_SEEKING:
3948 GstClockTime duration = GST_CLOCK_TIME_NONE;
3949 gboolean seekable = FALSE;
3951 GST_DEBUG_OBJECT (parse, "seeking query");
3952 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3954 /* consult upstream */
3955 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3957 /* we may be able to help if in TIME */
3958 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3959 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3960 /* already OK if upstream takes care */
3961 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3963 if (!(res && seekable)) {
3964 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3965 || duration == -1) {
3966 /* seekable if we still have a chance to get duration later on */
3968 parse->priv->upstream_seekable && parse->priv->update_interval;
3970 seekable = parse->priv->upstream_seekable;
3971 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3974 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3980 case GST_QUERY_FORMATS:
3981 gst_query_set_formatsv (query, 3, fmtlist);
3984 case GST_QUERY_CONVERT:
3986 GstFormat src_format, dest_format;
3987 gint64 src_value, dest_value;
3989 gst_query_parse_convert (query, &src_format, &src_value,
3990 &dest_format, &dest_value);
3992 res = gst_base_parse_convert (parse, src_format, src_value,
3993 dest_format, &dest_value);
3995 gst_query_set_convert (query, src_format, src_value,
3996 dest_format, dest_value);
4000 case GST_QUERY_LATENCY:
4002 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4004 GstClockTime min_latency, max_latency;
4006 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4007 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4008 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4009 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4011 GST_OBJECT_LOCK (parse);
4012 /* add our latency */
4013 min_latency += parse->priv->min_latency;
4014 if (max_latency == -1 || parse->priv->max_latency == -1)
4017 max_latency += parse->priv->max_latency;
4018 GST_OBJECT_UNLOCK (parse);
4020 gst_query_set_latency (query, live, min_latency, max_latency);
4024 case GST_QUERY_SEGMENT:
4029 format = parse->segment.format;
4032 gst_segment_to_stream_time (&parse->segment, format,
4033 parse->segment.start);
4034 if ((stop = parse->segment.stop) == -1)
4035 stop = parse->segment.duration;
4037 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4039 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4044 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4050 /* scans for a cluster start from @pos,
4051 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4052 static GstFlowReturn
4053 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4054 GstClockTime * time, GstClockTime * duration)
4056 GstBaseParseClass *klass;
4058 gboolean orig_drain, orig_discont;
4059 GstFlowReturn ret = GST_FLOW_OK;
4060 GstBuffer *buf = NULL;
4061 GstBaseParseFrame *sframe = NULL;
4063 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4064 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4065 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4067 klass = GST_BASE_PARSE_GET_CLASS (parse);
4069 *time = GST_CLOCK_TIME_NONE;
4070 *duration = GST_CLOCK_TIME_NONE;
4073 orig_offset = parse->priv->offset;
4074 orig_discont = parse->priv->discont;
4075 orig_drain = parse->priv->drain;
4077 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4078 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4080 /* jump elsewhere and locate next frame */
4081 parse->priv->offset = *pos;
4082 /* mark as scanning so frames don't get processed all the way */
4083 parse->priv->scanning = TRUE;
4084 ret = gst_base_parse_scan_frame (parse, klass);
4085 parse->priv->scanning = FALSE;
4086 /* retrieve frame found during scan */
4087 sframe = parse->priv->scanned_frame;
4088 parse->priv->scanned_frame = NULL;
4090 if (ret != GST_FLOW_OK || !sframe)
4093 /* get offset first, subclass parsing might dump other stuff in there */
4094 *pos = sframe->offset;
4095 buf = sframe->buffer;
4098 /* but it should provide proper time */
4099 *time = GST_BUFFER_TIMESTAMP (buf);
4100 *duration = GST_BUFFER_DURATION (buf);
4102 GST_LOG_OBJECT (parse,
4103 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4104 GST_TIME_ARGS (*time), *pos);
4108 gst_base_parse_frame_free (sframe);
4111 parse->priv->offset = orig_offset;
4112 parse->priv->discont = orig_discont;
4113 parse->priv->drain = orig_drain;
4118 /* bisect and scan through file for frame starting before @time,
4119 * returns OK and @time/@offset if found, NONE and/or error otherwise
4120 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4121 static GstFlowReturn
4122 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4125 GstFlowReturn ret = GST_FLOW_OK;
4126 gint64 lpos, hpos, newpos;
4127 GstClockTime time, ltime, htime, newtime, dur;
4128 gboolean cont = TRUE;
4129 const GstClockTime tolerance = TARGET_DIFFERENCE;
4130 const guint chunk = 4 * 1024;
4132 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4133 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4135 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4136 GST_TIME_ARGS (*_time));
4138 /* TODO also make keyframe aware if useful some day */
4153 /* do not know at first */
4155 *_time = GST_CLOCK_TIME_NONE;
4157 /* need initial positions; start and end */
4158 lpos = parse->priv->first_frame_offset;
4159 ltime = parse->priv->first_frame_pts;
4160 /* try other one if no luck */
4161 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4162 ltime = parse->priv->first_frame_dts;
4163 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4164 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4165 return GST_FLOW_ERROR;
4167 hpos = parse->priv->upstream_size;
4169 GST_DEBUG_OBJECT (parse,
4170 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4171 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4172 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4174 /* check preconditions are satisfied;
4175 * start and end are needed, except for special case where we scan for
4176 * last frame to determine duration */
4177 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4178 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4179 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4183 /* shortcut cases */
4186 } else if (time < ltime + tolerance) {
4190 } else if (time >= htime) {
4196 while (htime > ltime && cont) {
4197 GST_LOG_OBJECT (parse,
4198 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4199 GST_TIME_ARGS (ltime));
4200 GST_LOG_OBJECT (parse,
4201 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4202 GST_TIME_ARGS (htime));
4203 if (G_UNLIKELY (time == G_MAXINT64)) {
4205 } else if (G_LIKELY (hpos > lpos)) {
4207 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4210 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4212 /* we check this case once, but not forever, so break loop */
4217 newpos = CLAMP (newpos, lpos, hpos);
4218 GST_LOG_OBJECT (parse,
4219 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4220 GST_TIME_ARGS (time), newpos);
4222 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4223 if (ret == GST_FLOW_EOS) {
4224 /* heuristic HACK */
4225 hpos = MAX (lpos, hpos - chunk);
4227 } else if (ret != GST_FLOW_OK) {
4231 if (newtime == -1 || newpos == -1) {
4232 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4236 if (G_UNLIKELY (time == G_MAXINT64)) {
4239 if (GST_CLOCK_TIME_IS_VALID (dur))
4242 } else if (newtime > time) {
4244 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4246 } else if (newtime + tolerance > time) {
4247 /* close enough undershoot */
4251 } else if (newtime < ltime) {
4252 /* so a position beyond lpos resulted in earlier time than ltime ... */
4253 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4256 /* undershoot too far */
4257 newpos += newpos == lpos ? chunk : 0;
4258 lpos = CLAMP (newpos, lpos, hpos);
4264 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4265 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4270 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4271 gboolean before, GstClockTime * _ts)
4273 gint64 bytes = 0, ts = 0;
4274 GstIndexEntry *entry = NULL;
4276 if (time == GST_CLOCK_TIME_NONE) {
4282 GST_BASE_PARSE_INDEX_LOCK (parse);
4283 if (parse->priv->index) {
4284 /* Let's check if we have an index entry for that time */
4285 entry = gst_index_get_assoc_entry (parse->priv->index,
4286 parse->priv->index_id,
4287 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4288 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4292 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4293 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4295 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4296 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4297 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4299 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4300 GST_TIME_ARGS (time));
4303 ts = GST_CLOCK_TIME_NONE;
4306 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4315 /* returns TRUE if seek succeeded */
4317 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4322 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4323 gboolean flush, update, res = TRUE, accurate;
4324 gint64 start, stop, seekpos, seekstop;
4325 GstSegment seeksegment = { 0, };
4326 GstClockTime start_ts;
4328 GstEvent *segment_event;
4330 /* try upstream first, unless we're driving the streaming thread ourselves */
4331 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4332 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4337 gst_event_parse_seek (event, &rate, &format, &flags,
4338 &start_type, &start, &stop_type, &stop);
4339 seqnum = gst_event_get_seqnum (event);
4341 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4342 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4343 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4344 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4346 /* we can only handle TIME, so check if subclass can convert
4347 * to TIME format if it's some other format (such as DEFAULT) */
4348 if (format != GST_FORMAT_TIME) {
4349 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4350 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4352 goto no_convert_to_time;
4354 GST_INFO_OBJECT (parse, "converted %s format to start time "
4355 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4356 gst_format_get_name (format), GST_TIME_ARGS (start),
4357 GST_TIME_ARGS (stop));
4359 format = GST_FORMAT_TIME;
4362 /* no negative rates in push mode (unless upstream takes care of that, but
4363 * we've already tried upstream and it didn't handle the seek request) */
4364 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4367 if (start_type != GST_SEEK_TYPE_SET ||
4368 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4371 /* get flush flag */
4372 flush = flags & GST_SEEK_FLAG_FLUSH;
4374 /* copy segment, we need this because we still need the old
4375 * segment when we close the current segment. */
4376 gst_segment_copy_into (&parse->segment, &seeksegment);
4378 GST_DEBUG_OBJECT (parse, "configuring seek");
4379 gst_segment_do_seek (&seeksegment, rate, format, flags,
4380 start_type, start, stop_type, stop, &update);
4382 /* accurate seeking implies seek tables are used to obtain position,
4383 * and the requested segment is maintained exactly, not adjusted any way */
4384 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4386 /* maybe we can be accurate for (almost) free */
4387 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4388 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4389 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4394 GstClockTime startpos;
4396 startpos = seeksegment.position;
4400 /* accurate requested, so ... seek a bit before target */
4401 if (startpos < parse->priv->lead_in_ts)
4404 startpos -= parse->priv->lead_in_ts;
4406 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4407 seeksegment.stop = seeksegment.start + seeksegment.duration;
4409 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4410 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4414 start_ts = seeksegment.position;
4418 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4419 seeksegment.stop = seeksegment.start + seeksegment.duration;
4421 if (!gst_base_parse_convert (parse, format, start_ts,
4422 GST_FORMAT_BYTES, &seekpos))
4423 goto convert_failed;
4424 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4425 GST_FORMAT_BYTES, &seekstop))
4426 goto convert_failed;
4429 GST_DEBUG_OBJECT (parse,
4430 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4432 GST_DEBUG_OBJECT (parse,
4433 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4434 seeksegment.stop, seekstop);
4436 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4439 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4442 if (parse->srcpad) {
4443 GstEvent *fevent = gst_event_new_flush_start ();
4444 GST_DEBUG_OBJECT (parse, "sending flush start");
4446 gst_event_set_seqnum (fevent, seqnum);
4448 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4449 /* unlock upstream pull_range */
4450 gst_pad_push_event (parse->sinkpad, fevent);
4453 gst_pad_pause_task (parse->sinkpad);
4456 /* we should now be able to grab the streaming thread because we stopped it
4457 * with the above flush/pause code */
4458 GST_PAD_STREAM_LOCK (parse->sinkpad);
4460 /* save current position */
4461 last_stop = parse->segment.position;
4462 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4465 /* now commit to new position */
4467 /* prepare for streaming again */
4469 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4470 GST_DEBUG_OBJECT (parse, "sending flush stop");
4471 gst_event_set_seqnum (fevent, seqnum);
4472 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4473 gst_pad_push_event (parse->sinkpad, fevent);
4474 gst_base_parse_clear_queues (parse);
4476 /* keep track of our position */
4477 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4478 seeksegment.format, parse->segment.position);
4481 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4483 /* store the newsegment event so it can be sent from the streaming thread. */
4484 /* This will be sent later in _loop() */
4485 segment_event = gst_event_new_segment (&parse->segment);
4486 gst_event_set_seqnum (segment_event, seqnum);
4487 parse->priv->pending_events =
4488 g_list_prepend (parse->priv->pending_events, segment_event);
4490 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4491 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4492 ", time = %" GST_TIME_FORMAT, format,
4493 GST_TIME_ARGS (parse->segment.start),
4494 GST_TIME_ARGS (parse->segment.stop),
4495 GST_TIME_ARGS (parse->segment.time));
4497 /* one last chance in pull mode to stay accurate;
4498 * maybe scan and subclass can find where to go */
4501 GstClockTime ts = seeksegment.position;
4503 gst_base_parse_locate_time (parse, &ts, &scanpos);
4507 /* running collected index now consists of several intervals,
4508 * so optimized check no longer possible */
4509 parse->priv->index_last_valid = FALSE;
4510 parse->priv->index_last_offset = 0;
4511 parse->priv->index_last_ts = 0;
4515 /* mark discont if we are going to stream from another position. */
4516 if (seekpos != parse->priv->offset) {
4517 GST_DEBUG_OBJECT (parse,
4518 "mark DISCONT, we did a seek to another position");
4519 parse->priv->offset = seekpos;
4520 parse->priv->last_offset = seekpos;
4521 parse->priv->seen_keyframe = FALSE;
4522 parse->priv->discont = TRUE;
4523 parse->priv->next_dts = start_ts;
4524 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4525 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4526 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4527 parse->priv->sync_offset = seekpos;
4528 parse->priv->exact_position = accurate;
4531 /* Start streaming thread if paused */
4532 gst_pad_start_task (parse->sinkpad,
4533 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4535 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4540 GstEvent *new_event;
4541 GstBaseParseSeek *seek;
4542 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4544 /* The only thing we need to do in PUSH-mode is to send the
4545 seek event (in bytes) to upstream. Segment / flush handling happens
4546 in corresponding src event handlers */
4547 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4548 if (seekstop >= 0 && seekstop <= seekpos)
4550 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4551 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4552 gst_event_set_seqnum (new_event, seqnum);
4554 /* store segment info so its precise details can be reconstructed when
4555 * receiving newsegment;
4556 * this matters for all details when accurate seeking,
4557 * is most useful to preserve NONE stop time otherwise */
4558 seek = g_new0 (GstBaseParseSeek, 1);
4559 seek->segment = seeksegment;
4560 seek->accurate = accurate;
4561 seek->offset = seekpos;
4562 seek->start_ts = start_ts;
4563 GST_OBJECT_LOCK (parse);
4564 /* less optimal, but preserves order */
4565 parse->priv->pending_seeks =
4566 g_slist_append (parse->priv->pending_seeks, seek);
4567 GST_OBJECT_UNLOCK (parse);
4569 res = gst_pad_push_event (parse->sinkpad, new_event);
4572 GST_OBJECT_LOCK (parse);
4573 parse->priv->pending_seeks =
4574 g_slist_remove (parse->priv->pending_seeks, seek);
4575 GST_OBJECT_UNLOCK (parse);
4581 gst_event_unref (event);
4587 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4593 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4599 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4600 "couldn't convert that into TIME format", gst_format_get_name (format));
4606 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4613 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4615 if (taglist == parse->priv->upstream_tags)
4618 if (parse->priv->upstream_tags) {
4619 gst_tag_list_unref (parse->priv->upstream_tags);
4620 parse->priv->upstream_tags = NULL;
4623 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4625 if (taglist != NULL)
4626 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4628 gst_base_parse_check_bitrate_tags (parse);
4633 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4635 GstBaseParse *parse = GST_BASE_PARSE (element);
4637 GST_BASE_PARSE_INDEX_LOCK (parse);
4638 if (parse->priv->index)
4639 gst_object_unref (parse->priv->index);
4641 parse->priv->index = gst_object_ref (index);
4642 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4643 &parse->priv->index_id);
4644 parse->priv->own_index = FALSE;
4646 parse->priv->index = NULL;
4648 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4652 gst_base_parse_get_index (GstElement * element)
4654 GstBaseParse *parse = GST_BASE_PARSE (element);
4655 GstIndex *result = NULL;
4657 GST_BASE_PARSE_INDEX_LOCK (parse);
4658 if (parse->priv->index)
4659 result = gst_object_ref (parse->priv->index);
4660 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4666 static GstStateChangeReturn
4667 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4669 GstBaseParse *parse;
4670 GstStateChangeReturn result;
4672 parse = GST_BASE_PARSE (element);
4674 switch (transition) {
4675 case GST_STATE_CHANGE_READY_TO_PAUSED:
4676 /* If this is our own index destroy it as the
4677 * old entries might be wrong for the new stream */
4678 GST_BASE_PARSE_INDEX_LOCK (parse);
4679 if (parse->priv->own_index) {
4680 gst_object_unref (parse->priv->index);
4681 parse->priv->index = NULL;
4682 parse->priv->own_index = FALSE;
4685 /* If no index was created, generate one */
4686 if (G_UNLIKELY (!parse->priv->index)) {
4687 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4689 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4690 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4691 &parse->priv->index_id);
4692 parse->priv->own_index = TRUE;
4694 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4700 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4702 switch (transition) {
4703 case GST_STATE_CHANGE_PAUSED_TO_READY:
4704 gst_base_parse_reset (parse);
4714 * gst_base_parse_set_ts_at_offset:
4715 * @parse: a #GstBaseParse
4716 * @offset: offset into current buffer
4718 * This function should only be called from a @handle_frame implementation.
4720 * #GstBaseParse creates initial timestamps for frames by using the last
4721 * timestamp seen in the stream before the frame starts. In certain
4722 * cases, the correct timestamps will occur in the stream after the
4723 * start of the frame, but before the start of the actual picture data.
4724 * This function can be used to set the timestamps based on the offset
4725 * into the frame data that the picture starts.
4730 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4732 GstClockTime pts, dts;
4734 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4736 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4737 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4739 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4740 GST_DEBUG_OBJECT (parse,
4741 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4742 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4744 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4745 parse->priv->prev_pts = parse->priv->next_pts = pts;
4747 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4748 parse->priv->prev_dts = parse->priv->next_dts = dts;
4752 * gst_base_parse_merge_tags:
4753 * @parse: a #GstBaseParse
4754 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4755 * previously-set tags
4756 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4758 * Sets the parser subclass's tags and how they should be merged with any
4759 * upstream stream tags. This will override any tags previously-set
4760 * with gst_base_parse_merge_tags().
4762 * Note that this is provided for convenience, and the subclass is
4763 * not required to use this and can still do tag handling on its own.
4768 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4769 GstTagMergeMode mode)
4771 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4772 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4773 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4775 GST_OBJECT_LOCK (parse);
4777 if (tags != parse->priv->parser_tags) {
4778 if (parse->priv->parser_tags) {
4779 gst_tag_list_unref (parse->priv->parser_tags);
4780 parse->priv->parser_tags = NULL;
4781 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4784 parse->priv->parser_tags = gst_tag_list_ref (tags);
4785 parse->priv->parser_tags_merge_mode = mode;
4788 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4789 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4791 gst_base_parse_check_bitrate_tags (parse);
4792 parse->priv->tags_changed = TRUE;
4795 GST_OBJECT_UNLOCK (parse);