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;
369 #ifdef GST_BASEPARSE_MODIFICATION
370 /* to get pad mode early */
371 GstPadMode expected_pad_mode;
372 /* check first frame in base parser */
373 gboolean first_frame;
374 /* remove zero padding */
375 gint64 remove_from_total;
376 gboolean accurate_index_seek;
380 typedef struct _GstBaseParseSeek
385 GstClockTime start_ts;
388 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
393 PROP_DISABLE_PASSTHROUGH,
397 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
398 g_mutex_lock (&parse->priv->index_lock);
399 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
400 g_mutex_unlock (&parse->priv->index_lock);
402 static GstElementClass *parent_class = NULL;
404 static void gst_base_parse_class_init (GstBaseParseClass * klass);
405 static void gst_base_parse_init (GstBaseParse * parse,
406 GstBaseParseClass * klass);
409 gst_base_parse_get_type (void)
411 static volatile gsize base_parse_type = 0;
413 if (g_once_init_enter (&base_parse_type)) {
414 static const GTypeInfo base_parse_info = {
415 sizeof (GstBaseParseClass),
416 (GBaseInitFunc) NULL,
417 (GBaseFinalizeFunc) NULL,
418 (GClassInitFunc) gst_base_parse_class_init,
421 sizeof (GstBaseParse),
423 (GInstanceInitFunc) gst_base_parse_init,
427 _type = g_type_register_static (GST_TYPE_ELEMENT,
428 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
429 g_once_init_leave (&base_parse_type, _type);
431 return (GType) base_parse_type;
434 static void gst_base_parse_finalize (GObject * object);
436 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
437 GstStateChange transition);
438 static void gst_base_parse_reset (GstBaseParse * parse);
441 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
442 static GstIndex *gst_base_parse_get_index (GstElement * element);
445 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
447 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
448 GstObject * parent, GstPadMode mode, gboolean active);
449 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
451 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
452 GstTagList * taglist);
454 static void gst_base_parse_set_property (GObject * object, guint prop_id,
455 const GValue * value, GParamSpec * pspec);
456 static void gst_base_parse_get_property (GObject * object, guint prop_id,
457 GValue * value, GParamSpec * pspec);
459 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
461 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
464 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
466 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
469 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
471 static void gst_base_parse_loop (GstPad * pad);
473 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
474 GstBaseParseFrame * frame);
476 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
479 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
482 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
484 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
487 static void gst_base_parse_drain (GstBaseParse * parse);
489 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
490 GstClockTime time, gboolean before, GstClockTime * _ts);
491 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
492 GstClockTime * _time, gint64 * _offset);
494 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
495 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
497 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
499 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
501 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
503 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
506 gst_base_parse_clear_queues (GstBaseParse * parse)
508 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
509 g_slist_free (parse->priv->buffers_queued);
510 parse->priv->buffers_queued = NULL;
511 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
513 g_slist_free (parse->priv->buffers_pending);
514 parse->priv->buffers_pending = NULL;
515 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
516 g_slist_free (parse->priv->buffers_head);
517 parse->priv->buffers_head = NULL;
518 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
519 g_slist_free (parse->priv->buffers_send);
520 parse->priv->buffers_send = NULL;
522 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
523 g_list_free (parse->priv->detect_buffers);
524 parse->priv->detect_buffers = NULL;
525 parse->priv->detect_buffers_size = 0;
527 g_queue_foreach (&parse->priv->queued_frames,
528 (GFunc) gst_base_parse_frame_free, NULL);
529 g_queue_clear (&parse->priv->queued_frames);
531 gst_buffer_replace (&parse->priv->cache, NULL);
533 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
534 g_list_free (parse->priv->pending_events);
535 parse->priv->pending_events = NULL;
537 parse->priv->checked_media = FALSE;
541 gst_base_parse_finalize (GObject * object)
543 GstBaseParse *parse = GST_BASE_PARSE (object);
545 g_object_unref (parse->priv->adapter);
547 if (parse->priv->index) {
548 gst_object_unref (parse->priv->index);
549 parse->priv->index = NULL;
551 g_mutex_clear (&parse->priv->index_lock);
553 gst_base_parse_clear_queues (parse);
555 G_OBJECT_CLASS (parent_class)->finalize (object);
559 gst_base_parse_class_init (GstBaseParseClass * klass)
561 GObjectClass *gobject_class;
562 GstElementClass *gstelement_class;
564 gobject_class = G_OBJECT_CLASS (klass);
565 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
566 parent_class = g_type_class_peek_parent (klass);
568 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
569 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
570 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
573 * GstBaseParse:disable-passthrough:
575 * If set to %TRUE, baseparse will unconditionally force parsing of the
576 * incoming data. This can be required in the rare cases where the incoming
577 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
578 * force validation and parsing of the incoming data.
579 * If set to %FALSE, decision of whether to parse the data or not is up to
580 * the implementation (standard behaviour).
582 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
583 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
584 "Force processing (disables passthrough)",
585 DEFAULT_DISABLE_PASSTHROUGH,
586 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
588 gstelement_class = (GstElementClass *) klass;
589 gstelement_class->change_state =
590 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
593 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
594 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
597 /* Default handlers */
598 klass->sink_event = gst_base_parse_sink_event_default;
599 klass->src_event = gst_base_parse_src_event_default;
600 klass->sink_query = gst_base_parse_sink_query_default;
601 klass->src_query = gst_base_parse_src_query_default;
602 klass->convert = gst_base_parse_convert_default;
604 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
605 "baseparse element");
609 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
611 GstPadTemplate *pad_template;
613 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
615 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
618 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
619 g_return_if_fail (pad_template != NULL);
620 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
621 gst_pad_set_event_function (parse->sinkpad,
622 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
623 gst_pad_set_query_function (parse->sinkpad,
624 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
625 gst_pad_set_chain_function (parse->sinkpad,
626 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
627 gst_pad_set_activate_function (parse->sinkpad,
628 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
629 gst_pad_set_activatemode_function (parse->sinkpad,
630 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
631 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
632 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
634 GST_DEBUG_OBJECT (parse, "sinkpad created");
637 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
638 g_return_if_fail (pad_template != NULL);
639 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
640 gst_pad_set_event_function (parse->srcpad,
641 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
642 gst_pad_set_query_function (parse->srcpad,
643 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
644 gst_pad_use_fixed_caps (parse->srcpad);
645 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
646 GST_DEBUG_OBJECT (parse, "src created");
648 g_queue_init (&parse->priv->queued_frames);
650 parse->priv->adapter = gst_adapter_new ();
652 parse->priv->pad_mode = GST_PAD_MODE_NONE;
654 #ifdef GST_BASEPARSE_MODIFICATION
655 parse->priv->expected_pad_mode = GST_PAD_MODE_NONE;
658 g_mutex_init (&parse->priv->index_lock);
661 gst_base_parse_reset (parse);
662 GST_DEBUG_OBJECT (parse, "init ok");
664 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
666 parse->priv->upstream_tags = NULL;
667 parse->priv->parser_tags = NULL;
668 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
672 gst_base_parse_set_property (GObject * object, guint prop_id,
673 const GValue * value, GParamSpec * pspec)
675 GstBaseParse *parse = GST_BASE_PARSE (object);
678 case PROP_DISABLE_PASSTHROUGH:
679 parse->priv->disable_passthrough = g_value_get_boolean (value);
682 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
688 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
691 GstBaseParse *parse = GST_BASE_PARSE (object);
694 case PROP_DISABLE_PASSTHROUGH:
695 g_value_set_boolean (value, parse->priv->disable_passthrough);
698 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
703 static GstBaseParseFrame *
704 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
706 GstBaseParseFrame *copy;
708 copy = g_slice_dup (GstBaseParseFrame, frame);
709 copy->buffer = gst_buffer_ref (frame->buffer);
710 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
712 GST_TRACE ("copied frame %p -> %p", frame, copy);
718 gst_base_parse_frame_free (GstBaseParseFrame * frame)
720 GST_TRACE ("freeing frame %p", frame);
723 gst_buffer_unref (frame->buffer);
724 frame->buffer = NULL;
727 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
728 g_slice_free (GstBaseParseFrame, frame);
730 memset (frame, 0, sizeof (*frame));
734 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
735 (GBoxedCopyFunc) gst_base_parse_frame_copy,
736 (GBoxedFreeFunc) gst_base_parse_frame_free);
739 * gst_base_parse_frame_init:
740 * @frame: #GstBaseParseFrame.
742 * Sets a #GstBaseParseFrame to initial state. Currently this means
743 * all public fields are zero-ed and a private flag is set to make
744 * sure gst_base_parse_frame_free() only frees the contents but not
745 * the actual frame. Use this function to initialise a #GstBaseParseFrame
746 * allocated on the stack.
749 gst_base_parse_frame_init (GstBaseParseFrame * frame)
751 memset (frame, 0, sizeof (GstBaseParseFrame));
752 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
753 GST_TRACE ("inited frame %p", frame);
757 * gst_base_parse_frame_new:
758 * @buffer: (transfer none): a #GstBuffer
760 * @overhead: number of bytes in this frame which should be counted as
761 * metadata overhead, ie. not used to calculate the average bitrate.
762 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
764 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
765 * elements written in C should usually allocate the frame on the stack and
766 * then use gst_base_parse_frame_init() to initialise it.
768 * Returns: a newly-allocated #GstBaseParseFrame. Free with
769 * gst_base_parse_frame_free() when no longer needed.
772 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
775 GstBaseParseFrame *frame;
777 frame = g_slice_new0 (GstBaseParseFrame);
778 frame->buffer = gst_buffer_ref (buffer);
780 GST_TRACE ("created frame %p", frame);
785 gst_base_parse_update_flags (GstBaseParse * parse)
789 /* set flags one by one for clarity */
790 if (G_UNLIKELY (parse->priv->drain))
791 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
793 /* losing sync is pretty much a discont (and vice versa), no ? */
794 if (G_UNLIKELY (parse->priv->discont))
795 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
799 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
801 if (G_UNLIKELY (parse->priv->discont)) {
802 GST_DEBUG_OBJECT (parse, "marking DISCONT");
803 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
806 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
807 GST_LOG_OBJECT (parse, "marking as new frame");
808 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
811 frame->offset = parse->priv->prev_offset = parse->priv->offset;
815 gst_base_parse_reset (GstBaseParse * parse)
817 GST_OBJECT_LOCK (parse);
818 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
819 parse->priv->duration = -1;
820 parse->priv->min_frame_size = 1;
821 parse->priv->discont = TRUE;
822 parse->priv->flushing = FALSE;
823 parse->priv->saw_gaps = FALSE;
824 parse->priv->offset = 0;
825 parse->priv->sync_offset = 0;
826 parse->priv->update_interval = -1;
827 parse->priv->fps_num = parse->priv->fps_den = 0;
828 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
829 parse->priv->lead_in = parse->priv->lead_out = 0;
830 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
831 parse->priv->bitrate = 0;
832 parse->priv->framecount = 0;
833 parse->priv->bytecount = 0;
834 parse->priv->acc_duration = 0;
835 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
836 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
837 parse->priv->first_frame_offset = -1;
838 parse->priv->estimated_duration = -1;
839 parse->priv->estimated_drift = 0;
840 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
841 parse->priv->next_dts = 0;
842 parse->priv->syncable = TRUE;
843 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
844 parse->priv->passthrough = FALSE;
845 parse->priv->pts_interpolate = TRUE;
846 parse->priv->infer_ts = TRUE;
847 parse->priv->has_timing_info = FALSE;
848 parse->priv->min_bitrate = G_MAXUINT;
849 parse->priv->max_bitrate = 0;
850 parse->priv->avg_bitrate = 0;
851 parse->priv->posted_avg_bitrate = 0;
853 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
854 parse->priv->index_last_offset = -1;
855 parse->priv->index_last_valid = TRUE;
856 parse->priv->upstream_seekable = FALSE;
857 parse->priv->upstream_size = 0;
858 parse->priv->upstream_has_duration = FALSE;
859 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
860 parse->priv->idx_interval = 0;
861 parse->priv->idx_byte_interval = 0;
862 parse->priv->exact_position = TRUE;
863 parse->priv->seen_keyframe = FALSE;
864 parse->priv->checked_media = FALSE;
866 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
867 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
868 parse->priv->last_offset = 0;
870 parse->priv->skip = 0;
872 #ifdef GST_BASEPARSE_MODIFICATION
873 parse->priv->first_frame = TRUE;
874 parse->priv->remove_from_total = 0;
875 parse->priv->accurate_index_seek = TRUE;
878 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
880 g_list_free (parse->priv->pending_events);
881 parse->priv->pending_events = NULL;
883 if (parse->priv->cache) {
884 gst_buffer_unref (parse->priv->cache);
885 parse->priv->cache = NULL;
888 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
889 g_slist_free (parse->priv->pending_seeks);
890 parse->priv->pending_seeks = NULL;
892 if (parse->priv->adapter)
893 gst_adapter_clear (parse->priv->adapter);
895 gst_base_parse_set_upstream_tags (parse, NULL);
897 if (parse->priv->parser_tags) {
898 gst_tag_list_unref (parse->priv->parser_tags);
899 parse->priv->parser_tags = NULL;
901 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
903 parse->priv->new_frame = TRUE;
905 parse->priv->first_buffer = TRUE;
907 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
908 g_list_free (parse->priv->detect_buffers);
909 parse->priv->detect_buffers = NULL;
910 parse->priv->detect_buffers_size = 0;
911 #ifdef GST_BASEPARSE_MODIFICATION
912 parse->priv->accurate_index_seek = TRUE;
914 GST_OBJECT_UNLOCK (parse);
918 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
920 gboolean got_tag = FALSE;
923 if (parse->priv->upstream_tags != NULL)
924 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
926 if (!got_tag && parse->priv->parser_tags != NULL)
927 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
932 /* check if upstream or subclass tags contain bitrates already */
934 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
936 parse->priv->post_min_bitrate =
937 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
938 parse->priv->post_avg_bitrate =
939 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
940 parse->priv->post_max_bitrate =
941 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
944 /* Queues new tag event with the current combined state of the stream tags
945 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
947 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
949 GstTagList *merged_tags;
951 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
952 parse->priv->upstream_tags);
953 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
954 parse->priv->parser_tags);
955 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
958 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
959 parse->priv->parser_tags_merge_mode);
961 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
963 if (merged_tags == NULL)
966 if (gst_tag_list_is_empty (merged_tags)) {
967 gst_tag_list_unref (merged_tags);
971 /* only add bitrate tags to non-empty taglists for now, and only if neither
972 * upstream tags nor the subclass sets the bitrate tag in question already */
973 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
974 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
975 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MINIMUM_BITRATE,
976 parse->priv->min_bitrate, NULL);
978 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
979 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
980 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MAXIMUM_BITRATE,
981 parse->priv->max_bitrate, NULL);
983 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
984 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
985 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
986 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_BITRATE,
987 parse->priv->avg_bitrate, NULL);
990 parse->priv->pending_events =
991 g_list_prepend (parse->priv->pending_events,
992 gst_event_new_tag (merged_tags));
995 /* gst_base_parse_parse_frame:
996 * @parse: #GstBaseParse.
997 * @buffer: #GstBuffer.
999 * Default callback for parse_frame.
1001 static GstFlowReturn
1002 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1004 GstBuffer *buffer = frame->buffer;
1006 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
1007 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
1008 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
1010 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
1011 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
1012 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
1014 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
1015 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
1016 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
1021 /* gst_base_parse_convert:
1022 * @parse: #GstBaseParse.
1023 * @src_format: #GstFormat describing the source format.
1024 * @src_value: Source value to be converted.
1025 * @dest_format: #GstFormat defining the converted format.
1026 * @dest_value: Pointer where the conversion result will be put.
1028 * Converts using configured "convert" vmethod in #GstBaseParse class.
1030 * Returns: %TRUE if conversion was successful.
1033 gst_base_parse_convert (GstBaseParse * parse,
1034 GstFormat src_format,
1035 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1037 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1040 g_return_val_if_fail (dest_value != NULL, FALSE);
1042 if (!klass->convert)
1045 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
1047 #ifndef GST_DISABLE_GST_DEBUG
1050 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1051 GST_LOG_OBJECT (parse,
1052 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1053 GST_TIME_ARGS (src_value), *dest_value);
1054 } else if (dest_format == GST_FORMAT_TIME &&
1055 src_format == GST_FORMAT_BYTES) {
1056 GST_LOG_OBJECT (parse,
1057 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1058 src_value, GST_TIME_ARGS (*dest_value));
1060 GST_LOG_OBJECT (parse,
1061 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1062 GST_STR_NULL (gst_format_get_name (src_format)),
1063 GST_STR_NULL (gst_format_get_name (dest_format)),
1064 src_value, *dest_value);
1067 GST_DEBUG_OBJECT (parse, "conversion failed");
1075 /* gst_base_parse_sink_event:
1076 * @pad: #GstPad that received the event.
1077 * @event: #GstEvent to be handled.
1079 * Handler for sink pad events.
1081 * Returns: %TRUE if the event was handled.
1084 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1086 GstBaseParse *parse = GST_BASE_PARSE (parent);
1087 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1090 ret = bclass->sink_event (parse, event);
1096 /* gst_base_parse_sink_event_default:
1097 * @parse: #GstBaseParse.
1098 * @event: #GstEvent to be handled.
1100 * Element-level event handler function.
1102 * The event will be unreffed only if it has been handled and this
1103 * function returns %TRUE
1105 * Returns: %TRUE if the event was handled and not need forwarding.
1108 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1110 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1111 gboolean ret = FALSE;
1112 gboolean forward_immediate = FALSE;
1114 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1115 GST_EVENT_TYPE_NAME (event));
1117 switch (GST_EVENT_TYPE (event)) {
1118 case GST_EVENT_CAPS:
1122 gst_event_parse_caps (event, &caps);
1123 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1125 if (klass->set_sink_caps)
1126 ret = klass->set_sink_caps (parse, caps);
1130 /* will send our own caps downstream */
1131 gst_event_unref (event);
1135 case GST_EVENT_SEGMENT:
1137 const GstSegment *in_segment;
1138 GstSegment out_segment;
1139 gint64 offset = 0, next_dts;
1140 guint32 seqnum = gst_event_get_seqnum (event);
1142 gst_event_parse_segment (event, &in_segment);
1143 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1144 out_segment.rate = in_segment->rate;
1145 out_segment.applied_rate = in_segment->applied_rate;
1147 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1149 parse->priv->upstream_format = in_segment->format;
1150 if (in_segment->format == GST_FORMAT_BYTES) {
1151 GstBaseParseSeek *seek = NULL;
1154 /* stop time is allowed to be open-ended, but not start & pos */
1155 offset = in_segment->time;
1157 GST_OBJECT_LOCK (parse);
1158 for (node = parse->priv->pending_seeks; node; node = node->next) {
1159 GstBaseParseSeek *tmp = node->data;
1161 if (tmp->offset == offset) {
1166 parse->priv->pending_seeks =
1167 g_slist_remove (parse->priv->pending_seeks, seek);
1168 GST_OBJECT_UNLOCK (parse);
1171 GST_DEBUG_OBJECT (parse,
1172 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1173 seek->accurate ? " accurate" : "", &seek->segment);
1175 out_segment.start = seek->segment.start;
1176 out_segment.stop = seek->segment.stop;
1177 out_segment.time = seek->segment.start;
1179 next_dts = seek->start_ts;
1180 parse->priv->exact_position = seek->accurate;
1183 /* best attempt convert */
1184 /* as these are only estimates, stop is kept open-ended to avoid
1185 * premature cutting */
1186 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1187 GST_FORMAT_TIME, (gint64 *) & next_dts);
1189 out_segment.start = next_dts;
1190 out_segment.stop = GST_CLOCK_TIME_NONE;
1191 out_segment.time = next_dts;
1193 parse->priv->exact_position = (in_segment->start == 0);
1196 gst_event_unref (event);
1198 event = gst_event_new_segment (&out_segment);
1199 gst_event_set_seqnum (event, seqnum);
1201 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1202 GST_SEGMENT_FORMAT, in_segment);
1204 } else if (in_segment->format != GST_FORMAT_TIME) {
1205 /* Unknown incoming segment format. Output a default open-ended
1207 gst_event_unref (event);
1209 out_segment.start = 0;
1210 out_segment.stop = GST_CLOCK_TIME_NONE;
1211 out_segment.time = 0;
1213 event = gst_event_new_segment (&out_segment);
1214 gst_event_set_seqnum (event, seqnum);
1218 /* not considered BYTE seekable if it is talking to us in TIME,
1219 * whatever else it might claim */
1220 parse->priv->upstream_seekable = FALSE;
1221 next_dts = in_segment->start;
1222 gst_event_copy_segment (event, &out_segment);
1225 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1228 gst_segment_set_newsegment (&parse->segment, update, rate,
1229 applied_rate, format, start, stop, start);
1234 /* save the segment for later, right before we push a new buffer so that
1235 * the caps are fixed and the next linked element can receive
1236 * the segment but finish the current segment */
1237 GST_DEBUG_OBJECT (parse, "draining current segment");
1238 if (in_segment->rate > 0.0)
1239 gst_base_parse_drain (parse);
1241 gst_base_parse_finish_fragment (parse, FALSE);
1242 gst_adapter_clear (parse->priv->adapter);
1244 parse->priv->offset = offset;
1245 parse->priv->sync_offset = offset;
1246 parse->priv->next_dts = next_dts;
1247 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1248 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1249 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1250 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1251 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1252 parse->priv->discont = TRUE;
1253 parse->priv->seen_keyframe = FALSE;
1254 parse->priv->skip = 0;
1258 case GST_EVENT_SEGMENT_DONE:
1259 /* need to drain now, rather than upon a new segment,
1260 * since that would have SEGMENT_DONE come before potential
1261 * delayed last part of the current segment */
1262 GST_DEBUG_OBJECT (parse, "draining current segment");
1263 if (parse->segment.rate > 0.0)
1264 gst_base_parse_drain (parse);
1266 gst_base_parse_finish_fragment (parse, FALSE);
1267 /* Also forward event immediately, there might be no new data
1268 * coming afterwards that would allow us to forward it later */
1269 forward_immediate = TRUE;
1272 case GST_EVENT_FLUSH_START:
1273 GST_OBJECT_LOCK (parse);
1274 parse->priv->flushing = TRUE;
1275 GST_OBJECT_UNLOCK (parse);
1278 case GST_EVENT_FLUSH_STOP:
1279 gst_adapter_clear (parse->priv->adapter);
1280 gst_base_parse_clear_queues (parse);
1281 parse->priv->flushing = FALSE;
1282 parse->priv->discont = TRUE;
1283 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1284 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1285 parse->priv->new_frame = TRUE;
1286 parse->priv->skip = 0;
1288 forward_immediate = TRUE;
1292 if (parse->segment.rate > 0.0)
1293 gst_base_parse_drain (parse);
1295 gst_base_parse_finish_fragment (parse, TRUE);
1297 /* If we STILL have zero frames processed, fire an error */
1298 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1299 !parse->priv->first_buffer) {
1300 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1301 ("No valid frames found before end of stream"), (NULL));
1304 if (!parse->priv->saw_gaps
1305 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1306 /* We've not posted bitrate tags yet - do so now */
1307 gst_base_parse_queue_tag_event_update (parse);
1310 /* newsegment and other serialized events before eos */
1311 gst_base_parse_push_pending_events (parse);
1313 forward_immediate = TRUE;
1315 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1316 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1317 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1318 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1321 const GstStructure *s;
1322 gboolean ev_still_state;
1324 s = gst_event_get_structure (event);
1326 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1327 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1328 if (ev_still_state) {
1329 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1330 if (parse->segment.rate > 0.0)
1331 gst_base_parse_drain (parse);
1333 gst_base_parse_finish_fragment (parse, TRUE);
1335 forward_immediate = TRUE;
1341 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1343 gst_base_parse_push_pending_events (parse);
1345 if (parse->segment.rate > 0.0)
1346 gst_base_parse_drain (parse);
1348 gst_base_parse_finish_fragment (parse, TRUE);
1349 forward_immediate = TRUE;
1350 parse->priv->saw_gaps = TRUE;
1355 GstTagList *tags = NULL;
1357 gst_event_parse_tag (event, &tags);
1359 /* We only care about stream tags here, global tags we just forward */
1360 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1363 gst_base_parse_set_upstream_tags (parse, tags);
1364 gst_base_parse_queue_tag_event_update (parse);
1365 parse->priv->tags_changed = FALSE;
1366 gst_event_unref (event);
1371 case GST_EVENT_STREAM_START:
1373 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1374 forward_immediate = TRUE;
1376 gst_base_parse_set_upstream_tags (parse, NULL);
1377 parse->priv->tags_changed = TRUE;
1384 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1385 * For EOS this is required because no buffer or serialized event
1386 * will come after EOS and nothing could trigger another
1387 * _finish_frame() call. *
1388 * If the subclass handles sending of EOS manually it can return
1389 * _DROPPED from ::finish() and all other subclasses should have
1390 * decoded/flushed all remaining data before this
1392 * For FLUSH_STOP this is required because it is expected
1393 * to be forwarded immediately and no buffers are queued anyway.
1396 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1397 ret = gst_pad_push_event (parse->srcpad, event);
1399 parse->priv->pending_events =
1400 g_list_prepend (parse->priv->pending_events, event);
1405 GST_DEBUG_OBJECT (parse, "event handled");
1411 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1416 pad = GST_BASE_PARSE_SINK_PAD (parse);
1418 switch (GST_QUERY_TYPE (query)) {
1419 case GST_QUERY_CAPS:
1421 GstBaseParseClass *bclass;
1423 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1425 if (bclass->get_sink_caps) {
1426 GstCaps *caps, *filter;
1428 gst_query_parse_caps (query, &filter);
1429 caps = bclass->get_sink_caps (parse, filter);
1430 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1432 gst_query_set_caps_result (query, caps);
1433 gst_caps_unref (caps);
1437 GstCaps *caps, *template_caps, *filter;
1439 gst_query_parse_caps (query, &filter);
1440 template_caps = gst_pad_get_pad_template_caps (pad);
1441 if (filter != NULL) {
1443 gst_caps_intersect_full (filter, template_caps,
1444 GST_CAPS_INTERSECT_FIRST);
1445 gst_caps_unref (template_caps);
1447 caps = template_caps;
1449 gst_query_set_caps_result (query, caps);
1450 gst_caps_unref (caps);
1458 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1467 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1469 GstBaseParseClass *bclass;
1470 GstBaseParse *parse;
1473 parse = GST_BASE_PARSE (parent);
1474 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1476 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1478 if (bclass->sink_query)
1479 ret = bclass->sink_query (parse, query);
1483 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1484 GST_QUERY_TYPE_NAME (query), ret, query);
1490 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1492 GstBaseParseClass *bclass;
1493 GstBaseParse *parse;
1496 parse = GST_BASE_PARSE (parent);
1497 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1499 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1500 GST_QUERY_TYPE_NAME (query), query);
1502 if (bclass->src_query)
1503 ret = bclass->src_query (parse, query);
1507 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1508 GST_QUERY_TYPE_NAME (query), ret, query);
1513 /* gst_base_parse_src_event:
1514 * @pad: #GstPad that received the event.
1515 * @event: #GstEvent that was received.
1517 * Handler for source pad events.
1519 * Returns: %TRUE if the event was handled.
1522 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1524 GstBaseParse *parse;
1525 GstBaseParseClass *bclass;
1526 gboolean ret = TRUE;
1528 parse = GST_BASE_PARSE (parent);
1529 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1531 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1532 GST_EVENT_TYPE_NAME (event));
1534 if (bclass->src_event)
1535 ret = bclass->src_event (parse, event);
1537 gst_event_unref (event);
1543 gst_base_parse_is_seekable (GstBaseParse * parse)
1545 /* FIXME: could do more here, e.g. check index or just send data from 0
1546 * in pull mode and let decoder/sink clip */
1547 return parse->priv->syncable;
1550 /* gst_base_parse_src_event_default:
1551 * @parse: #GstBaseParse.
1552 * @event: #GstEvent that was received.
1554 * Default srcpad event handler.
1556 * Returns: %TRUE if the event was handled and can be dropped.
1559 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1561 gboolean res = FALSE;
1563 switch (GST_EVENT_TYPE (event)) {
1564 case GST_EVENT_SEEK:
1565 if (gst_base_parse_is_seekable (parse))
1566 res = gst_base_parse_handle_seek (parse, event);
1569 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1578 * gst_base_parse_convert_default:
1579 * @parse: #GstBaseParse.
1580 * @src_format: #GstFormat describing the source format.
1581 * @src_value: Source value to be converted.
1582 * @dest_format: #GstFormat defining the converted format.
1583 * @dest_value: Pointer where the conversion result will be put.
1585 * Default implementation of "convert" vmethod in #GstBaseParse class.
1587 * Returns: %TRUE if conversion was successful.
1590 gst_base_parse_convert_default (GstBaseParse * parse,
1591 GstFormat src_format,
1592 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1594 gboolean ret = FALSE;
1595 guint64 bytes, duration;
1597 if (G_UNLIKELY (src_format == dest_format)) {
1598 *dest_value = src_value;
1602 if (G_UNLIKELY (src_value == -1)) {
1607 if (G_UNLIKELY (src_value == 0)) {
1612 /* need at least some frames */
1613 if (!parse->priv->framecount)
1616 #ifdef GST_BASEPARSE_MODIFICATION
1617 duration = parse->priv->acc_duration / GST_USECOND;
1619 duration = parse->priv->acc_duration / GST_MSECOND;
1621 bytes = parse->priv->bytecount;
1623 if (G_UNLIKELY (!duration || !bytes))
1624 goto no_duration_bytes;
1626 if (src_format == GST_FORMAT_BYTES) {
1627 if (dest_format == GST_FORMAT_TIME) {
1628 /* BYTES -> TIME conversion */
1629 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1630 #ifdef GST_BASEPARSE_MODIFICATION
1631 src_value = src_value - parse->priv->remove_from_total;
1633 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1634 #ifdef GST_BASEPARSE_MODIFICATION
1635 *dest_value /= GST_USECOND;
1637 *dest_value *= GST_MSECOND;
1638 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1639 *dest_value / GST_MSECOND);
1642 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1644 } else if (src_format == GST_FORMAT_TIME) {
1645 if (dest_format == GST_FORMAT_BYTES) {
1646 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1647 #ifdef GST_BASEPARSE_MODIFICATION
1648 *dest_value = gst_util_uint64_scale (src_value / GST_USECOND, bytes,
1651 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1654 GST_DEBUG_OBJECT (parse,
1655 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1656 src_value / GST_MSECOND, *dest_value);
1659 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1661 } else if (src_format == GST_FORMAT_DEFAULT) {
1662 /* DEFAULT == frame-based */
1663 if (dest_format == GST_FORMAT_TIME) {
1664 GST_DEBUG_OBJECT (parse, "converting default -> time");
1665 if (parse->priv->fps_den) {
1666 *dest_value = gst_util_uint64_scale (src_value,
1667 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1671 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1674 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1681 GST_DEBUG_OBJECT (parse, "no framecount");
1686 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1687 G_GUINT64_FORMAT, duration, bytes);
1694 gst_base_parse_update_duration (GstBaseParse * parse)
1696 gint64 ptot, dest_value;
1698 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1701 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1702 GST_FORMAT_TIME, &dest_value))
1705 /* inform if duration changed, but try to avoid spamming */
1706 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1708 parse->priv->estimated_duration = dest_value;
1709 GST_LOG_OBJECT (parse,
1710 "updated estimated duration to %" GST_TIME_FORMAT,
1711 GST_TIME_ARGS (dest_value));
1713 if (parse->priv->estimated_drift > GST_SECOND ||
1714 parse->priv->estimated_drift < -GST_SECOND) {
1715 gst_element_post_message (GST_ELEMENT (parse),
1716 gst_message_new_duration_changed (GST_OBJECT (parse)));
1717 parse->priv->estimated_drift = 0;
1721 /* gst_base_parse_update_bitrates:
1722 * @parse: #GstBaseParse.
1723 * @buffer: Current frame as a #GstBuffer
1725 * Keeps track of the minimum and maximum bitrates, and also maintains a
1726 * running average bitrate of the stream so far.
1729 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1731 /* Only update the tag on a 10 kbps delta */
1732 static const gint update_threshold = 10000;
1734 guint64 data_len, frame_dur;
1735 gint overhead, frame_bitrate, old_avg_bitrate;
1736 GstBuffer *buffer = frame->buffer;
1738 overhead = frame->overhead;
1742 data_len = gst_buffer_get_size (buffer) - overhead;
1743 parse->priv->data_bytecount += data_len;
1745 /* duration should be valid by now,
1746 * either set by subclass or maybe based on fps settings */
1747 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1748 /* Calculate duration of a frame from buffer properties */
1749 frame_dur = GST_BUFFER_DURATION (buffer);
1750 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1751 parse->priv->acc_duration;
1754 /* No way to figure out frame duration (is this even possible?) */
1758 /* override if subclass provided bitrate, e.g. metadata based */
1759 if (parse->priv->bitrate) {
1760 parse->priv->avg_bitrate = parse->priv->bitrate;
1761 /* spread this (confirmed) info ASAP */
1762 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1763 parse->priv->tags_changed = TRUE;
1767 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1771 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1772 parse->priv->avg_bitrate);
1774 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1777 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1778 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1779 || parse->priv->post_max_bitrate))
1780 parse->priv->tags_changed = TRUE;
1782 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1783 if (frame_bitrate < parse->priv->min_bitrate) {
1784 parse->priv->min_bitrate = frame_bitrate;
1785 if (parse->priv->post_min_bitrate)
1786 parse->priv->tags_changed = TRUE;
1789 if (frame_bitrate > parse->priv->max_bitrate) {
1790 parse->priv->max_bitrate = frame_bitrate;
1791 if (parse->priv->post_max_bitrate)
1792 parse->priv->tags_changed = TRUE;
1795 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1796 if (((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1797 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1798 update_threshold) && parse->priv->post_avg_bitrate)
1799 parse->priv->tags_changed = TRUE;
1804 * gst_base_parse_add_index_entry:
1805 * @parse: #GstBaseParse.
1806 * @offset: offset of entry
1807 * @ts: timestamp associated with offset
1808 * @key: whether entry refers to keyframe
1809 * @force: add entry disregarding sanity checks
1811 * Adds an entry to the index associating @offset to @ts. It is recommended
1812 * to only add keyframe entries. @force allows to bypass checks, such as
1813 * whether the stream is (upstream) seekable, another entry is already "close"
1814 * to the new entry, etc.
1816 * Returns: #gboolean indicating whether entry was added
1819 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1820 GstClockTime ts, gboolean key, gboolean force)
1822 gboolean ret = FALSE;
1823 GstIndexAssociation associations[2];
1825 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1826 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1828 if (G_LIKELY (!force)) {
1830 if (!parse->priv->upstream_seekable) {
1831 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1835 /* FIXME need better helper data structure that handles these issues
1836 * related to ongoing collecting of index entries */
1837 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1839 GST_LOG_OBJECT (parse,
1840 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1841 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1845 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1846 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1847 parse->priv->idx_interval) {
1848 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1849 GST_TIME_ARGS (parse->priv->index_last_ts));
1853 /* if last is not really the last one */
1854 if (!parse->priv->index_last_valid) {
1855 GstClockTime prev_ts;
1857 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1858 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1859 GST_LOG_OBJECT (parse,
1860 "entry too close to existing entry %" GST_TIME_FORMAT,
1861 GST_TIME_ARGS (prev_ts));
1862 parse->priv->index_last_offset = offset;
1863 parse->priv->index_last_ts = ts;
1869 associations[0].format = GST_FORMAT_TIME;
1870 associations[0].value = ts;
1871 associations[1].format = GST_FORMAT_BYTES;
1872 associations[1].value = offset;
1874 /* index might change on-the-fly, although that would be nutty app ... */
1875 GST_BASE_PARSE_INDEX_LOCK (parse);
1876 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1877 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1878 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1879 (const GstIndexAssociation *) &associations);
1880 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1883 parse->priv->index_last_offset = offset;
1884 parse->priv->index_last_ts = ts;
1893 /* check for seekable upstream, above and beyond a mere query */
1895 gst_base_parse_check_seekability (GstBaseParse * parse)
1898 gboolean seekable = FALSE;
1899 gint64 start = -1, stop = -1;
1900 guint idx_interval = 0;
1901 guint64 idx_byte_interval = 0;
1903 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1904 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1905 GST_DEBUG_OBJECT (parse, "seeking query failed");
1909 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1911 /* try harder to query upstream size if we didn't get it the first time */
1912 if (seekable && stop == -1) {
1913 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1914 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1917 /* if upstream doesn't know the size, it's likely that it's not seekable in
1918 * practice even if it technically may be seekable */
1919 if (seekable && (start != 0 || stop <= start)) {
1920 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1924 /* let's not put every single frame into our index */
1926 if (stop < 10 * 1024 * 1024)
1928 else if (stop < 100 * 1024 * 1024)
1931 idx_interval = 1000;
1933 /* ensure that even for large files (e.g. very long audio files), the index
1934 * stays reasonably-size, with some arbitrary limit to the total number of
1936 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1937 GST_DEBUG_OBJECT (parse,
1938 "Limiting index entries to %d, indexing byte interval %"
1939 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1943 gst_query_unref (query);
1945 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1946 G_GUINT64_FORMAT ")", seekable, start, stop);
1947 parse->priv->upstream_seekable = seekable;
1948 parse->priv->upstream_size = seekable ? stop : 0;
1950 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1951 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1952 parse->priv->idx_byte_interval = idx_byte_interval;
1955 /* some misc checks on upstream */
1957 gst_base_parse_check_upstream (GstBaseParse * parse)
1961 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1962 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1963 /* upstream has one, accept it also, and no further updates */
1964 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1965 parse->priv->upstream_has_duration = TRUE;
1968 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1969 parse->priv->upstream_has_duration);
1972 /* checks src caps to determine if dealing with audio or video */
1973 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1975 gst_base_parse_check_media (GstBaseParse * parse)
1980 caps = gst_pad_get_current_caps (parse->srcpad);
1981 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1982 parse->priv->is_video =
1983 g_str_has_prefix (gst_structure_get_name (s), "video");
1985 /* historical default */
1986 parse->priv->is_video = FALSE;
1989 gst_caps_unref (caps);
1991 parse->priv->checked_media = TRUE;
1992 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1995 /* takes ownership of frame */
1997 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1999 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2000 /* frame allocated on the heap, we can just take ownership */
2001 g_queue_push_tail (&parse->priv->queued_frames, frame);
2002 GST_TRACE ("queued frame %p", frame);
2004 GstBaseParseFrame *copy;
2006 /* probably allocated on the stack, must make a proper copy */
2007 copy = gst_base_parse_frame_copy (frame);
2008 g_queue_push_tail (&parse->priv->queued_frames, copy);
2009 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2010 gst_base_parse_frame_free (frame);
2014 /* makes sure that @buf is properly prepared and decorated for passing
2015 * to baseclass, and an equally setup frame is returned setup with @buf.
2016 * Takes ownership of @buf. */
2017 static GstBaseParseFrame *
2018 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2020 GstBaseParseFrame *frame = NULL;
2022 buffer = gst_buffer_make_writable (buffer);
2024 GST_LOG_OBJECT (parse,
2025 "preparing frame at offset %" G_GUINT64_FORMAT
2026 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2027 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2028 gst_buffer_get_size (buffer));
2030 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2032 gst_base_parse_update_flags (parse);
2034 frame = gst_base_parse_frame_new (buffer, 0, 0);
2035 gst_buffer_unref (buffer);
2036 gst_base_parse_update_frame (parse, frame);
2038 /* clear flags for next frame */
2039 parse->priv->discont = FALSE;
2040 parse->priv->new_frame = FALSE;
2042 /* use default handler to provide initial (upstream) metadata */
2043 gst_base_parse_parse_frame (parse, frame);
2048 /* Wraps buffer in a frame and dispatches to subclass.
2049 * Also manages data skipping and offset handling (including adapter flushing).
2050 * Takes ownership of @buffer */
2051 static GstFlowReturn
2052 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2053 gint * skip, gint * flushed)
2055 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2056 GstBaseParseFrame *frame;
2059 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2061 GST_LOG_OBJECT (parse,
2062 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2063 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2064 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2065 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2066 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2068 /* track what is being flushed during this single round of frame processing */
2069 parse->priv->flushed = 0;
2072 /* make it easy for _finish_frame to pick up input data */
2073 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2074 gst_buffer_ref (buffer);
2075 gst_adapter_push (parse->priv->adapter, buffer);
2078 #ifdef GST_BASEPARSE_MODIFICATION
2079 /* some one-time start-up */
2080 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2081 gst_base_parse_check_seekability (parse);
2082 gst_base_parse_check_upstream (parse);
2086 frame = gst_base_parse_prepare_frame (parse, buffer);
2087 ret = klass->handle_frame (parse, frame, skip);
2089 *flushed = parse->priv->flushed;
2091 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2094 /* subclass can only do one of these, or semantics are too unclear */
2095 g_assert (*skip == 0 || *flushed == 0);
2097 /* track skipping */
2099 GstClockTime pts, dts;
2102 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2103 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2104 /* reverse playback, and no frames found yet, so we are skipping
2105 * the leading part of a fragment, which may form the tail of
2106 * fragment coming later, hopefully subclass skips efficiently ... */
2107 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2108 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2109 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2110 outbuf = gst_buffer_make_writable (outbuf);
2111 GST_BUFFER_PTS (outbuf) = pts;
2112 GST_BUFFER_DTS (outbuf) = dts;
2113 parse->priv->buffers_head =
2114 g_slist_prepend (parse->priv->buffers_head, outbuf);
2117 /* If we're asked to skip more than is available in the adapter,
2118 we need to remember what we need to skip for next iteration */
2119 gsize av = gst_adapter_available (parse->priv->adapter);
2120 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2122 gst_adapter_flush (parse->priv->adapter, *skip);
2125 ("This is more than available, flushing %" G_GSIZE_FORMAT
2126 ", storing %u to skip", av, (guint) (*skip - av));
2127 parse->priv->skip = *skip - av;
2128 gst_adapter_flush (parse->priv->adapter, av);
2132 if (!parse->priv->discont)
2133 parse->priv->sync_offset = parse->priv->offset;
2134 parse->priv->offset += *skip;
2135 parse->priv->discont = TRUE;
2136 /* check for indefinite skipping */
2137 if (ret == GST_FLOW_OK)
2138 ret = gst_base_parse_check_sync (parse);
2141 parse->priv->offset += *flushed;
2143 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2144 gst_adapter_clear (parse->priv->adapter);
2147 gst_base_parse_frame_free (frame);
2152 /* gst_base_parse_push_pending_events:
2153 * @parse: #GstBaseParse
2155 * Pushes the pending events
2158 gst_base_parse_push_pending_events (GstBaseParse * parse)
2160 if (G_UNLIKELY (parse->priv->pending_events)) {
2161 GList *r = g_list_reverse (parse->priv->pending_events);
2164 parse->priv->pending_events = NULL;
2165 for (l = r; l != NULL; l = l->next) {
2166 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2172 /* gst_base_parse_handle_and_push_frame:
2173 * @parse: #GstBaseParse.
2174 * @klass: #GstBaseParseClass.
2175 * @frame: (transfer full): a #GstBaseParseFrame
2177 * Parses the frame from given buffer and pushes it forward. Also performs
2178 * timestamp handling and checks the segment limits.
2180 * This is called with srcpad STREAM_LOCK held.
2182 * Returns: #GstFlowReturn
2184 static GstFlowReturn
2185 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2186 GstBaseParseFrame * frame)
2191 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2193 buffer = frame->buffer;
2194 offset = frame->offset;
2196 /* check if subclass/format can provide ts.
2197 * If so, that allows and enables extra seek and duration determining options */
2198 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2199 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2200 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2201 parse->priv->first_frame_offset = offset;
2202 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2203 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2204 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2205 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2206 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2207 GST_TIME_ARGS (parse->priv->first_frame_pts),
2208 parse->priv->first_frame_offset);
2209 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2211 GstClockTime last_ts = G_MAXINT64;
2213 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2214 gst_base_parse_locate_time (parse, &last_ts, &off);
2215 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2216 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2219 /* disable further checks */
2220 parse->priv->first_frame_offset = 0;
2224 /* track upstream time if provided, not subclass' internal notion of it */
2225 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2226 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2227 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2230 /* interpolating and no valid pts yet,
2231 * start with dts and carry on from there */
2232 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2233 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2234 parse->priv->next_pts = parse->priv->next_dts;
2236 /* again use default handler to add missing metadata;
2237 * we may have new information on frame properties */
2238 gst_base_parse_parse_frame (parse, frame);
2240 #ifdef GST_BASEPARSE_MODIFICATION
2241 if (parse->priv->first_frame) {
2242 parse->priv->remove_from_total = GST_BUFFER_OFFSET (buffer);
2243 GST_DEBUG_OBJECT (parse, "first frame has offset %" G_GINT64_FORMAT ". remove from total",
2244 parse->priv->remove_from_total);
2245 parse->priv->first_frame = FALSE;
2249 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2250 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2251 parse->priv->next_dts =
2252 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2253 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2254 GstClockTime next_pts =
2255 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2256 if (next_pts >= parse->priv->next_dts)
2257 parse->priv->next_pts = next_pts;
2260 /* we lost track, do not produce bogus time next time around
2261 * (probably means parser subclass has given up on parsing as well) */
2262 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2263 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2266 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2267 GST_BUFFER_PTS_IS_VALID (buffer))
2268 gst_base_parse_add_index_entry (parse, offset,
2269 GST_BUFFER_PTS (buffer),
2270 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2272 /* All OK, push queued frames if there are any */
2273 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2274 GstBaseParseFrame *queued_frame;
2276 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2277 gst_base_parse_push_frame (parse, queued_frame);
2278 gst_base_parse_frame_free (queued_frame);
2282 return gst_base_parse_push_frame (parse, frame);
2286 * gst_base_parse_push_frame:
2287 * @parse: #GstBaseParse.
2288 * @frame: (transfer none): a #GstBaseParseFrame
2290 * Pushes the frame's buffer downstream, sends any pending events and
2291 * does some timestamp and segment handling. Takes ownership of
2292 * frame's buffer, though caller retains ownership of @frame.
2294 * This must be called with sinkpad STREAM_LOCK held.
2296 * Returns: #GstFlowReturn
2299 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2301 GstFlowReturn ret = GST_FLOW_OK;
2302 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2303 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2304 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2308 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2309 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2311 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2313 buffer = frame->buffer;
2315 GST_LOG_OBJECT (parse,
2316 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2317 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2318 gst_buffer_get_size (buffer),
2319 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2320 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2321 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2324 parse->priv->bytecount += frame->size;
2325 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2326 parse->priv->framecount++;
2327 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2328 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2331 /* 0 means disabled */
2332 if (parse->priv->update_interval < 0)
2333 parse->priv->update_interval = 50;
2334 else if (parse->priv->update_interval > 0 &&
2335 #ifdef GST_BASEPARSE_MODIFICATION
2336 ((parse->priv->framecount - 1) % parse->priv->update_interval) == 0)
2338 (parse->priv->framecount % parse->priv->update_interval) == 0)
2340 gst_base_parse_update_duration (parse);
2342 if (GST_BUFFER_PTS_IS_VALID (buffer))
2343 last_start = last_stop = GST_BUFFER_PTS (buffer);
2344 if (last_start != GST_CLOCK_TIME_NONE
2345 && GST_BUFFER_DURATION_IS_VALID (buffer))
2346 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2348 /* should have caps by now */
2349 if (!gst_pad_has_current_caps (parse->srcpad))
2352 if (G_UNLIKELY (!parse->priv->checked_media)) {
2353 /* have caps; check identity */
2354 gst_base_parse_check_media (parse);
2357 if (parse->priv->tags_changed) {
2358 gst_base_parse_queue_tag_event_update (parse);
2359 parse->priv->tags_changed = FALSE;
2362 /* Push pending events, including SEGMENT events */
2363 gst_base_parse_push_pending_events (parse);
2365 /* segment adjustment magic; only if we are running the whole show */
2366 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2367 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2368 parse->priv->upstream_seekable)) {
2370 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2371 GST_CLOCK_TIME_IS_VALID (last_start)) {
2372 GstClockTimeDiff diff;
2374 /* only send newsegments with increasing start times,
2375 * otherwise if these go back and forth downstream (sinks) increase
2376 * accumulated time and running_time */
2377 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2378 if (G_UNLIKELY (diff > 2 * GST_SECOND
2379 && last_start > parse->segment.start
2380 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2381 || last_start < parse->segment.stop))) {
2383 GST_DEBUG_OBJECT (parse,
2384 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2385 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2386 "Sending updated SEGMENT events", diff,
2387 GST_TIME_ARGS (parse->segment.position),
2388 GST_TIME_ARGS (last_start));
2390 /* skip gap FIXME */
2391 gst_pad_push_event (parse->srcpad,
2392 gst_event_new_segment (&parse->segment));
2394 parse->segment.position = last_start;
2399 /* update bitrates and optionally post corresponding tags
2400 * (following newsegment) */
2401 gst_base_parse_update_bitrates (parse, frame);
2403 if (klass->pre_push_frame) {
2404 ret = klass->pre_push_frame (parse, frame);
2406 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2409 /* take final ownership of frame buffer */
2410 if (frame->out_buffer) {
2411 buffer = frame->out_buffer;
2412 frame->out_buffer = NULL;
2413 gst_buffer_replace (&frame->buffer, NULL);
2415 buffer = frame->buffer;
2416 frame->buffer = NULL;
2419 /* subclass must play nice */
2420 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2422 size = gst_buffer_get_size (buffer);
2424 parse->priv->seen_keyframe |= parse->priv->is_video &&
2425 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2427 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2428 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2429 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2430 GST_BUFFER_TIMESTAMP (buffer) >
2431 parse->segment.stop + parse->priv->lead_out_ts) {
2432 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2434 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2435 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2436 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2437 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2438 parse->priv->lead_in_ts < parse->segment.start) {
2439 if (parse->priv->seen_keyframe) {
2440 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2443 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2444 ret = GST_BASE_PARSE_FLOW_DROPPED;
2451 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2452 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2453 gst_buffer_unref (buffer);
2455 } else if (ret == GST_FLOW_OK) {
2456 if (parse->segment.rate > 0.0) {
2457 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2459 ret = gst_pad_push (parse->srcpad, buffer);
2460 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2461 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2463 /* in backwards playback mode, if on passthrough we need to push buffers
2464 * directly without accumulating them into the buffers_queued as baseparse
2465 * will never check for a DISCONT while on passthrough and those buffers
2466 * will never be pushed.
2468 * also, as we are on reverse playback, it might be possible that
2469 * passthrough might have just been enabled, so make sure to drain the
2470 * buffers_queued list */
2471 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2472 gst_base_parse_finish_fragment (parse, TRUE);
2473 ret = gst_base_parse_send_buffers (parse);
2476 if (ret == GST_FLOW_OK) {
2477 GST_LOG_OBJECT (parse,
2478 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2479 ret = gst_pad_push (parse->srcpad, buffer);
2480 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2481 gst_flow_get_name (ret));
2483 GST_LOG_OBJECT (parse,
2484 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2485 gst_flow_get_name (ret));
2486 gst_buffer_unref (buffer);
2490 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2492 parse->priv->buffers_queued =
2493 g_slist_prepend (parse->priv->buffers_queued, buffer);
2497 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2498 size, gst_flow_get_name (ret));
2499 gst_buffer_unref (buffer);
2500 /* if we are not sufficiently in control, let upstream decide on EOS */
2501 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2502 (parse->priv->passthrough ||
2503 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2504 !parse->priv->upstream_seekable)))
2508 /* Update current running segment position */
2509 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2510 && last_stop != GST_CLOCK_TIME_NONE
2511 && parse->segment.position < last_stop)
2512 parse->segment.position = last_stop;
2519 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2520 return GST_FLOW_FLUSHING;
2522 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2523 return GST_FLOW_ERROR;
2528 * gst_base_parse_finish_frame:
2529 * @parse: a #GstBaseParse
2530 * @frame: a #GstBaseParseFrame
2531 * @size: consumed input data represented by frame
2533 * Collects parsed data and pushes this downstream.
2534 * Source pad caps must be set when this is called.
2536 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2537 * Otherwise, @size samples will be taken from the input and used for output,
2538 * and the output's metadata (timestamps etc) will be taken as (optionally)
2539 * set by the subclass on @frame's (input) buffer (which is otherwise
2540 * ignored for any but the above purpose/information).
2542 * Note that the latter buffer is invalidated by this call, whereas the
2543 * caller retains ownership of @frame.
2545 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2548 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2551 GstFlowReturn ret = GST_FLOW_OK;
2553 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2554 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2555 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2556 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2559 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2560 "flushing size %d", frame->offset, size);
2562 /* some one-time start-up */
2563 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2564 gst_base_parse_check_seekability (parse);
2565 gst_base_parse_check_upstream (parse);
2568 parse->priv->flushed += size;
2570 if (parse->priv->scanning && frame->buffer) {
2571 if (!parse->priv->scanned_frame) {
2572 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2577 /* either PUSH or PULL mode arranges for adapter data */
2578 /* ensure output buffer */
2579 if (!frame->out_buffer) {
2580 GstBuffer *src, *dest;
2582 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2583 dest = frame->out_buffer;
2584 src = frame->buffer;
2585 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2586 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2587 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2588 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2589 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2590 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2592 gst_adapter_flush (parse->priv->adapter, size);
2595 /* use as input for subsequent processing */
2596 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2597 gst_buffer_unref (frame->out_buffer);
2598 frame->out_buffer = NULL;
2600 /* mark input size consumed */
2603 /* subclass might queue frames/data internally if it needs more
2604 * frames to decide on the format, or might request us to queue here. */
2605 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2606 gst_buffer_replace (&frame->buffer, NULL);
2608 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2609 GstBaseParseFrame *copy;
2611 copy = gst_base_parse_frame_copy (frame);
2612 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2613 gst_base_parse_queue_frame (parse, copy);
2617 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2623 /* gst_base_parse_drain:
2625 * Drains the adapter until it is empty. It decreases the min_frame_size to
2626 * match the current adapter size and calls chain method until the adapter
2627 * is emptied or chain returns with error.
2630 gst_base_parse_drain (GstBaseParse * parse)
2634 GST_DEBUG_OBJECT (parse, "draining");
2635 parse->priv->drain = TRUE;
2638 avail = gst_adapter_available (parse->priv->adapter);
2642 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2643 NULL) != GST_FLOW_OK) {
2647 /* nothing changed, maybe due to truncated frame; break infinite loop */
2648 if (avail == gst_adapter_available (parse->priv->adapter)) {
2649 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2650 gst_adapter_clear (parse->priv->adapter);
2654 parse->priv->drain = FALSE;
2657 /* gst_base_parse_send_buffers
2659 * Sends buffers collected in send_buffers downstream, and ensures that list
2660 * is empty at the end (errors or not).
2662 static GstFlowReturn
2663 gst_base_parse_send_buffers (GstBaseParse * parse)
2665 GSList *send = NULL;
2667 GstFlowReturn ret = GST_FLOW_OK;
2668 gboolean first = TRUE;
2670 send = parse->priv->buffers_send;
2674 buf = GST_BUFFER_CAST (send->data);
2675 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2676 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2677 ", offset %" G_GINT64_FORMAT, buf,
2678 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2679 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2680 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2682 /* Make sure the first buffer is always DISCONT. If we split
2683 * GOPs inside the parser this is otherwise not guaranteed */
2685 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2689 /* iterate output queue an push downstream */
2690 ret = gst_pad_push (parse->srcpad, buf);
2691 send = g_slist_delete_link (send, send);
2693 /* clear any leftover if error */
2694 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2696 buf = GST_BUFFER_CAST (send->data);
2697 gst_buffer_unref (buf);
2698 send = g_slist_delete_link (send, send);
2703 parse->priv->buffers_send = send;
2708 /* gst_base_parse_start_fragment:
2710 * Prepares for processing a reverse playback (forward) fragment
2711 * by (re)setting proper state variables.
2713 static GstFlowReturn
2714 gst_base_parse_start_fragment (GstBaseParse * parse)
2716 GST_LOG_OBJECT (parse, "starting fragment");
2718 /* invalidate so no fall-back timestamping is performed;
2719 * ok if taken from subclass or upstream */
2720 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2721 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2722 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2723 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2724 /* prevent it hanging around stop all the time */
2725 parse->segment.position = GST_CLOCK_TIME_NONE;
2727 parse->priv->discont = TRUE;
2729 /* head of previous fragment is now pending tail of current fragment */
2730 parse->priv->buffers_pending = parse->priv->buffers_head;
2731 parse->priv->buffers_head = NULL;
2737 /* gst_base_parse_finish_fragment:
2739 * Processes a reverse playback (forward) fragment:
2740 * - append head of last fragment that was skipped to current fragment data
2741 * - drain the resulting current fragment data (i.e. repeated chain)
2742 * - add time/duration (if needed) to frames queued by chain
2743 * - push queued data
2745 static GstFlowReturn
2746 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2749 GstFlowReturn ret = GST_FLOW_OK;
2750 gboolean seen_key = FALSE, seen_delta = FALSE;
2752 GST_LOG_OBJECT (parse, "finishing fragment");
2755 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2756 while (parse->priv->buffers_pending) {
2757 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2759 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2760 gst_buffer_get_size (buf));
2761 gst_adapter_push (parse->priv->adapter, buf);
2763 GST_LOG_OBJECT (parse, "discarding head buffer");
2764 gst_buffer_unref (buf);
2766 parse->priv->buffers_pending =
2767 g_slist_delete_link (parse->priv->buffers_pending,
2768 parse->priv->buffers_pending);
2771 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2772 /* initial skipped data is added to buffers_pending */
2773 gst_base_parse_drain (parse);
2775 if (parse->priv->buffers_send) {
2776 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2777 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2780 /* add metadata (if needed to queued buffers */
2781 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2782 GST_TIME_ARGS (parse->priv->last_pts));
2783 while (parse->priv->buffers_queued) {
2784 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2786 /* no touching if upstream or parsing provided time */
2787 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2788 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2789 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2790 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2791 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2792 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2793 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2795 parse->priv->last_pts = 0;
2796 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2797 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2798 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2800 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2801 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2802 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2804 parse->priv->last_dts = 0;
2805 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2806 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2807 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2810 /* no idea, very bad */
2811 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2814 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2815 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2817 /* reverse order for ascending sending */
2818 /* send downstream at keyframe not preceded by a keyframe
2819 * (e.g. that should identify start of collection of IDR nals) */
2820 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2822 ret = gst_base_parse_send_buffers (parse);
2823 /* if a problem, throw all to sending */
2824 if (ret != GST_FLOW_OK) {
2825 parse->priv->buffers_send =
2826 g_slist_reverse (parse->priv->buffers_queued);
2827 parse->priv->buffers_queued = NULL;
2837 parse->priv->buffers_send =
2838 g_slist_prepend (parse->priv->buffers_send, buf);
2839 parse->priv->buffers_queued =
2840 g_slist_delete_link (parse->priv->buffers_queued,
2841 parse->priv->buffers_queued);
2844 /* audio may have all marked as keyframe, so arrange to send here. Also
2845 * we might have ended the loop above on a keyframe, in which case we
2847 if (!seen_delta || seen_key)
2848 ret = gst_base_parse_send_buffers (parse);
2850 /* any trailing unused no longer usable (ideally none) */
2851 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2852 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2853 gst_adapter_available (parse->priv->adapter));
2854 gst_adapter_clear (parse->priv->adapter);
2860 /* small helper that checks whether we have been trying to resync too long */
2861 static inline GstFlowReturn
2862 gst_base_parse_check_sync (GstBaseParse * parse)
2864 if (G_UNLIKELY (parse->priv->discont &&
2865 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2866 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2867 ("Failed to parse stream"), (NULL));
2868 return GST_FLOW_ERROR;
2874 static GstFlowReturn
2875 gst_base_parse_process_streamheader (GstBaseParse * parse)
2879 const GValue *value;
2880 GstFlowReturn ret = GST_FLOW_OK;
2882 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2886 str = gst_caps_get_structure (caps, 0);
2887 value = gst_structure_get_value (str, "streamheader");
2891 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2893 if (GST_VALUE_HOLDS_ARRAY (value)) {
2895 gsize len = gst_value_array_get_size (value);
2897 for (i = 0; i < len; i++) {
2899 gst_value_get_buffer (gst_value_array_get_value (value, i));
2901 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2902 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2905 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2906 GstBuffer *buffer = gst_value_get_buffer (value);
2908 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2909 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2912 gst_caps_unref (caps);
2919 gst_caps_unref (caps);
2922 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2927 static GstFlowReturn
2928 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2930 GstBaseParseClass *bclass;
2931 GstBaseParse *parse;
2932 GstFlowReturn ret = GST_FLOW_OK;
2933 GstFlowReturn old_ret = GST_FLOW_OK;
2934 GstBuffer *tmpbuf = NULL;
2938 GstClockTime pts, dts;
2940 parse = GST_BASE_PARSE (parent);
2941 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2942 GST_DEBUG_OBJECT (parent, "chain");
2944 /* early out for speed, if we need to skip */
2945 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
2946 parse->priv->skip = 0;
2947 if (parse->priv->skip > 0) {
2948 gsize bsize = gst_buffer_get_size (buffer);
2949 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2951 if (parse->priv->skip >= bsize) {
2952 parse->priv->skip -= bsize;
2953 GST_DEBUG ("All the buffer is skipped");
2954 parse->priv->offset += bsize;
2955 parse->priv->sync_offset = parse->priv->offset;
2958 buffer = gst_buffer_make_writable (buffer);
2959 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2960 parse->priv->offset += parse->priv->skip;
2961 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2962 (unsigned) (bsize - parse->priv->skip));
2963 parse->priv->skip = 0;
2964 parse->priv->discont = TRUE;
2967 if (G_UNLIKELY (parse->priv->first_buffer)) {
2968 parse->priv->first_buffer = FALSE;
2969 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2970 /* this stream has no header buffers, check if we just prepend the
2971 * streamheader from caps to the stream */
2972 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2973 "prepend to the stream");
2974 gst_base_parse_process_streamheader (parse);
2976 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2977 "streamheader from caps");
2981 if (parse->priv->detecting) {
2982 GstBuffer *detect_buf;
2984 if (parse->priv->detect_buffers_size == 0) {
2985 detect_buf = gst_buffer_ref (buffer);
2990 detect_buf = gst_buffer_new ();
2992 for (l = parse->priv->detect_buffers; l; l = l->next) {
2993 gsize tmpsize = gst_buffer_get_size (l->data);
2995 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2996 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3000 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3001 offset, gst_buffer_get_size (buffer));
3004 ret = bclass->detect (parse, detect_buf);
3005 gst_buffer_unref (detect_buf);
3007 if (ret == GST_FLOW_OK) {
3010 /* Detected something */
3011 parse->priv->detecting = FALSE;
3013 for (l = parse->priv->detect_buffers; l; l = l->next) {
3014 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3016 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3017 parent, GST_BUFFER_CAST (l->data));
3019 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3021 g_list_free (parse->priv->detect_buffers);
3022 parse->priv->detect_buffers = NULL;
3023 parse->priv->detect_buffers_size = 0;
3025 if (ret != GST_FLOW_OK) {
3029 /* Handle the current buffer */
3030 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3031 /* Still detecting, append buffer or error out if draining */
3033 if (parse->priv->drain) {
3034 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3035 return GST_FLOW_ERROR;
3036 } else if (parse->priv->flushing) {
3037 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3039 g_list_free (parse->priv->detect_buffers);
3040 parse->priv->detect_buffers = NULL;
3041 parse->priv->detect_buffers_size = 0;
3043 parse->priv->detect_buffers =
3044 g_list_append (parse->priv->detect_buffers, buffer);
3045 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3049 /* Something went wrong, subclass responsible for error reporting */
3053 /* And now handle the current buffer if detection worked */
3056 if (G_LIKELY (buffer)) {
3057 GST_LOG_OBJECT (parse,
3058 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3059 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3060 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3061 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3062 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3064 if (G_UNLIKELY (!parse->priv->disable_passthrough
3065 && parse->priv->passthrough)) {
3066 GstBaseParseFrame frame;
3068 gst_base_parse_frame_init (&frame);
3069 frame.buffer = gst_buffer_make_writable (buffer);
3070 ret = gst_base_parse_push_frame (parse, &frame);
3071 gst_base_parse_frame_free (&frame);
3074 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3075 /* upstream feeding us in reverse playback;
3076 * finish previous fragment and start new upon DISCONT */
3077 if (parse->segment.rate < 0.0) {
3078 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3079 ret = gst_base_parse_finish_fragment (parse, TRUE);
3080 gst_base_parse_start_fragment (parse);
3082 /* discont in the stream, drain and mark discont for next output */
3083 gst_base_parse_drain (parse);
3084 parse->priv->discont = TRUE;
3087 gst_adapter_push (parse->priv->adapter, buffer);
3090 /* Parse and push as many frames as possible */
3091 /* Stop either when adapter is empty or we are flushing */
3092 while (!parse->priv->flushing) {
3095 /* note: if subclass indicates MAX fsize,
3096 * this will not likely be available anyway ... */
3097 min_size = MAX (parse->priv->min_frame_size, fsize);
3098 av = gst_adapter_available (parse->priv->adapter);
3100 if (G_UNLIKELY (parse->priv->drain)) {
3102 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3103 if (G_UNLIKELY (!min_size)) {
3108 /* Collect at least min_frame_size bytes */
3109 if (av < min_size) {
3110 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3114 /* move along with upstream timestamp (if any),
3115 * but interpolate in between */
3116 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3117 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3118 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
3119 parse->priv->prev_pts = parse->priv->next_pts = pts;
3121 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
3122 parse->priv->prev_dts = parse->priv->next_dts = dts;
3124 /* we can mess with, erm interpolate, timestamps,
3125 * and incoming stuff has PTS but no DTS seen so far,
3126 * then pick up DTS from PTS and hope for the best ... */
3127 if (parse->priv->infer_ts &&
3128 parse->priv->pts_interpolate &&
3129 !GST_CLOCK_TIME_IS_VALID (dts) &&
3130 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
3131 GST_CLOCK_TIME_IS_VALID (pts))
3132 parse->priv->next_dts = pts;
3134 /* always pass all available data */
3135 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3137 /* already inform subclass what timestamps we have planned,
3138 * at least if provided by time-based upstream */
3139 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3140 tmpbuf = gst_buffer_make_writable (tmpbuf);
3141 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3142 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3143 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3146 /* keep the adapter mapped, so keep track of what has to be flushed */
3147 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3150 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3153 if (skip == 0 && flush == 0) {
3154 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3155 "breaking to get more data");
3156 /* ignore this return as it produced no data */
3164 GST_LOG_OBJECT (parse, "chain leaving");
3168 /* pull @size bytes at current offset,
3169 * i.e. at least try to and possibly return a shorter buffer if near the end */
3170 static GstFlowReturn
3171 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3172 GstBuffer ** buffer)
3174 GstFlowReturn ret = GST_FLOW_OK;
3176 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3178 /* Caching here actually makes much less difference than one would expect.
3179 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3180 if (parse->priv->cache) {
3181 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3182 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3184 if (cache_offset <= parse->priv->offset &&
3185 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3186 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3187 parse->priv->offset - cache_offset, size);
3188 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3191 /* not enough data in the cache, free cache and get a new one */
3192 gst_buffer_unref (parse->priv->cache);
3193 parse->priv->cache = NULL;
3196 /* refill the cache */
3198 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3199 64 * 1024), &parse->priv->cache);
3200 if (ret != GST_FLOW_OK) {
3201 parse->priv->cache = NULL;
3205 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3207 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3209 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3213 /* Not possible to get enough data, try a last time with
3214 * requesting exactly the size we need */
3215 gst_buffer_unref (parse->priv->cache);
3216 parse->priv->cache = NULL;
3218 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3219 &parse->priv->cache);
3221 if (ret != GST_FLOW_OK) {
3222 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3227 if (gst_buffer_get_size (parse->priv->cache) < size) {
3228 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3229 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3230 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3232 *buffer = parse->priv->cache;
3233 parse->priv->cache = NULL;
3239 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3240 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3245 static GstFlowReturn
3246 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3249 GstClockTime ts = 0;
3253 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3254 ", last_offset = %" G_GINT64_FORMAT,
3255 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3257 if (!parse->priv->last_offset
3258 || parse->priv->last_pts <= parse->segment.start) {
3259 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3260 GST_TIME_ARGS (parse->segment.start));
3265 /* last fragment started at last_offset / last_ts;
3266 * seek back 10s capped at 1MB */
3267 if (parse->priv->last_pts >= 10 * GST_SECOND)
3268 ts = parse->priv->last_pts - 10 * GST_SECOND;
3269 /* if we are exact now, we will be more so going backwards */
3270 if (parse->priv->exact_position) {
3271 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3273 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3274 GST_FORMAT_BYTES, &offset)) {
3275 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3278 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3279 parse->priv->last_offset - 1024);
3280 offset = MAX (0, offset);
3282 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3284 parse->priv->offset = offset;
3286 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3288 if (ret != GST_FLOW_OK)
3291 /* offset will increase again as fragment is processed/parsed */
3292 parse->priv->last_offset = offset;
3294 gst_base_parse_start_fragment (parse);
3295 gst_adapter_push (parse->priv->adapter, buffer);
3296 ret = gst_base_parse_finish_fragment (parse, TRUE);
3297 if (ret != GST_FLOW_OK)
3300 /* force previous fragment */
3301 parse->priv->offset = -1;
3308 * pull and scan for next frame starting from current offset
3309 * ajusts sync, drain and offset going along */
3310 static GstFlowReturn
3311 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3314 GstFlowReturn ret = GST_FLOW_OK;
3315 guint fsize, min_size;
3319 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3320 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3322 /* let's make this efficient for all subclass once and for all;
3323 * maybe it does not need this much, but in the latter case, we know we are
3324 * in pull mode here and might as well try to read and supply more anyway
3325 * (so does the buffer caching mechanism) */
3329 min_size = MAX (parse->priv->min_frame_size, fsize);
3331 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3333 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3334 if (ret != GST_FLOW_OK)
3337 /* if we got a short read, inform subclass we are draining leftover
3338 * and no more is to be expected */
3339 if (gst_buffer_get_size (buffer) < min_size) {
3340 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3341 parse->priv->drain = TRUE;
3344 if (parse->priv->detecting) {
3345 ret = klass->detect (parse, buffer);
3346 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3347 /* If draining we error out, otherwise request a buffer
3349 if (parse->priv->drain) {
3350 gst_buffer_unref (buffer);
3351 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3352 return GST_FLOW_ERROR;
3355 gst_buffer_unref (buffer);
3358 } else if (ret != GST_FLOW_OK) {
3359 gst_buffer_unref (buffer);
3360 GST_ERROR_OBJECT (parse, "detect() returned %s",
3361 gst_flow_get_name (ret));
3365 /* Else handle this buffer normally */
3368 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3369 if (ret != GST_FLOW_OK)
3372 /* If a large amount of data was requested to be skipped, _handle_buffer
3373 might have set the priv->skip flag to an extra amount on top of skip.
3374 In pull mode, we can just pull from the new offset directly. */
3375 parse->priv->offset += parse->priv->skip;
3376 parse->priv->skip = 0;
3378 /* something flushed means something happened,
3379 * and we should bail out of this loop so as not to occupy
3380 * the task thread indefinitely */
3382 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3385 /* nothing flushed, no skip and draining, so nothing left to do */
3386 if (!skip && parse->priv->drain) {
3387 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3388 "breaking loop and marking EOS");
3392 /* otherwise, get some more data
3393 * note that is checked this does not happen indefinitely */
3395 GST_LOG_OBJECT (parse, "getting some more data");
3398 parse->priv->drain = FALSE;
3405 /* Loop that is used in pull mode to retrieve data from upstream */
3407 gst_base_parse_loop (GstPad * pad)
3409 GstBaseParse *parse;
3410 GstBaseParseClass *klass;
3411 GstFlowReturn ret = GST_FLOW_OK;
3413 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3414 klass = GST_BASE_PARSE_GET_CLASS (parse);
3416 GST_LOG_OBJECT (parse, "Entering parse loop");
3418 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3423 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3426 event = gst_event_new_stream_start (stream_id);
3427 gst_event_set_group_id (event, gst_util_group_id_next ());
3429 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3430 gst_pad_push_event (parse->srcpad, event);
3431 parse->priv->push_stream_start = FALSE;
3435 /* reverse playback:
3436 * first fragment (closest to stop time) is handled normally below,
3437 * then we pull in fragments going backwards */
3438 if (parse->segment.rate < 0.0) {
3439 /* check if we jumped back to a previous fragment,
3440 * which is a post-first fragment */
3441 if (parse->priv->offset < 0) {
3442 ret = gst_base_parse_handle_previous_fragment (parse);
3447 ret = gst_base_parse_scan_frame (parse, klass);
3449 /* eat expected eos signalling past segment in reverse playback */
3450 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3451 parse->segment.position >= parse->segment.stop) {
3452 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3453 /* push what was accumulated during loop run */
3454 gst_base_parse_finish_fragment (parse, FALSE);
3455 /* force previous fragment */
3456 parse->priv->offset = -1;
3460 if (ret != GST_FLOW_OK)
3464 if (ret == GST_FLOW_EOS)
3466 else if (ret != GST_FLOW_OK)
3469 gst_object_unref (parse);
3476 GST_DEBUG_OBJECT (parse, "eos");
3481 gboolean push_eos = FALSE;
3483 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3484 gst_flow_get_name (ret));
3485 gst_pad_pause_task (parse->sinkpad);
3487 if (ret == GST_FLOW_EOS) {
3488 /* handle end-of-stream/segment */
3489 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3492 if ((stop = parse->segment.stop) == -1)
3493 stop = parse->segment.duration;
3495 GST_DEBUG_OBJECT (parse, "sending segment_done");
3497 gst_element_post_message
3498 (GST_ELEMENT_CAST (parse),
3499 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3500 GST_FORMAT_TIME, stop));
3501 gst_pad_push_event (parse->srcpad,
3502 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3504 /* If we STILL have zero frames processed, fire an error */
3505 if (parse->priv->framecount == 0) {
3506 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3507 ("No valid frames found before end of stream"), (NULL));
3511 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3512 /* for fatal errors we post an error message, wrong-state is
3513 * not fatal because it happens due to flushes and only means
3514 * that we should stop now. */
3515 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3516 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3520 if (parse->priv->estimated_duration <= 0) {
3521 gst_base_parse_update_duration (parse);
3523 /* Push pending events, including SEGMENT events */
3524 gst_base_parse_push_pending_events (parse);
3526 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3528 gst_object_unref (parse);
3533 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3535 GstSchedulingFlags sched_flags;
3536 GstBaseParse *parse;
3540 parse = GST_BASE_PARSE (parent);
3542 GST_DEBUG_OBJECT (parse, "sink activate");
3544 query = gst_query_new_scheduling ();
3545 if (!gst_pad_peer_query (sinkpad, query)) {
3546 gst_query_unref (query);
3547 goto baseparse_push;
3550 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3552 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3553 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3555 gst_query_unref (query);
3558 goto baseparse_push;
3560 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3561 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3562 goto baseparse_push;
3564 parse->priv->push_stream_start = TRUE;
3566 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3571 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3572 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3577 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3579 GstBaseParseClass *klass;
3580 gboolean result = TRUE;
3582 GST_DEBUG_OBJECT (parse, "activate %d", active);
3584 klass = GST_BASE_PARSE_GET_CLASS (parse);
3587 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3588 result = klass->start (parse);
3590 /* If the subclass implements ::detect we want to
3591 * call it for the first buffers now */
3592 parse->priv->detecting = (klass->detect != NULL);
3594 /* We must make sure streaming has finished before resetting things
3595 * and calling the ::stop vfunc */
3596 GST_PAD_STREAM_LOCK (parse->sinkpad);
3597 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3599 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3600 result = klass->stop (parse);
3602 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3604 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3609 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3610 GstPadMode mode, gboolean active)
3613 GstBaseParse *parse;
3615 parse = GST_BASE_PARSE (parent);
3617 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3618 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3620 #ifdef GST_BASEPARSE_MODIFICATION
3621 /* to know early what is the mode */
3622 parse->priv->expected_pad_mode = active ? mode : GST_PAD_MODE_NONE;
3625 if (!gst_base_parse_activate (parse, active))
3626 goto activate_failed;
3629 case GST_PAD_MODE_PULL:
3631 parse->priv->pending_events =
3632 g_list_prepend (parse->priv->pending_events,
3633 gst_event_new_segment (&parse->segment));
3636 result = gst_pad_stop_task (pad);
3644 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3646 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3653 GST_DEBUG_OBJECT (parse, "activate failed");
3659 * gst_base_parse_set_duration:
3660 * @parse: #GstBaseParse.
3662 * @duration: duration value.
3663 * @interval: how often to update the duration estimate based on bitrate, or 0.
3665 * Sets the duration of the currently playing media. Subclass can use this
3666 * when it is able to determine duration and/or notices a change in the media
3667 * duration. Alternatively, if @interval is non-zero (default), then stream
3668 * duration is determined based on estimated bitrate, and updated every @interval
3672 gst_base_parse_set_duration (GstBaseParse * parse,
3673 GstFormat fmt, gint64 duration, gint interval)
3675 g_return_if_fail (parse != NULL);
3677 if (parse->priv->upstream_has_duration) {
3678 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3682 if (duration != parse->priv->duration) {
3685 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3686 gst_element_post_message (GST_ELEMENT (parse), m);
3688 /* TODO: what about duration tag? */
3690 parse->priv->duration = duration;
3691 parse->priv->duration_fmt = fmt;
3692 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3693 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3694 if (interval != 0) {
3695 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3699 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3700 parse->priv->update_interval = interval;
3706 * gst_base_parse_set_average_bitrate:
3707 * @parse: #GstBaseParse.
3708 * @bitrate: average bitrate in bits/second
3710 * Optionally sets the average bitrate detected in media (if non-zero),
3711 * e.g. based on metadata, as it will be posted to the application.
3713 * By default, announced average bitrate is estimated. The average bitrate
3714 * is used to estimate the total duration of the stream and to estimate
3715 * a seek position, if there's no index and the format is syncable
3716 * (see gst_base_parse_set_syncable()).
3719 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3721 parse->priv->bitrate = bitrate;
3722 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3726 * gst_base_parse_set_min_frame_size:
3727 * @parse: #GstBaseParse.
3728 * @min_size: Minimum size of the data that this base class should give to
3731 * Subclass can use this function to tell the base class that it needs to
3732 * give at least #min_size buffers.
3735 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3737 g_return_if_fail (parse != NULL);
3739 parse->priv->min_frame_size = min_size;
3740 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3744 * gst_base_parse_set_frame_rate:
3745 * @parse: the #GstBaseParse to set
3746 * @fps_num: frames per second (numerator).
3747 * @fps_den: frames per second (denominator).
3748 * @lead_in: frames needed before a segment for subsequent decode
3749 * @lead_out: frames needed after a segment
3751 * If frames per second is configured, parser can take care of buffer duration
3752 * and timestamping. When performing segment clipping, or seeking to a specific
3753 * location, a corresponding decoder might need an initial @lead_in and a
3754 * following @lead_out number of frames to ensure the desired segment is
3755 * entirely filled upon decoding.
3758 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3759 guint fps_den, guint lead_in, guint lead_out)
3761 g_return_if_fail (parse != NULL);
3763 parse->priv->fps_num = fps_num;
3764 parse->priv->fps_den = fps_den;
3765 if (!fps_num || !fps_den) {
3766 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3768 fps_num = fps_den = 0;
3769 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3770 parse->priv->lead_in = parse->priv->lead_out = 0;
3771 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3773 parse->priv->frame_duration =
3774 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3775 parse->priv->lead_in = lead_in;
3776 parse->priv->lead_out = lead_out;
3777 parse->priv->lead_in_ts =
3778 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3779 parse->priv->lead_out_ts =
3780 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3781 /* aim for about 1.5s to estimate duration */
3782 if (parse->priv->update_interval < 0) {
3783 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3784 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3785 parse->priv->update_interval);
3788 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3789 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3790 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3791 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3792 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3793 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3797 * gst_base_parse_set_has_timing_info:
3798 * @parse: a #GstBaseParse
3799 * @has_timing: whether frames carry timing information
3801 * Set if frames carry timing information which the subclass can (generally)
3802 * parse and provide. In particular, intrinsic (rather than estimated) time
3803 * can be obtained following a seek.
3806 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3808 parse->priv->has_timing_info = has_timing;
3809 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3813 * gst_base_parse_set_syncable:
3814 * @parse: a #GstBaseParse
3815 * @syncable: set if frame starts can be identified
3817 * Set if frame starts can be identified. This is set by default and
3818 * determines whether seeking based on bitrate averages
3819 * is possible for a format/stream.
3822 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3824 parse->priv->syncable = syncable;
3825 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3829 * gst_base_parse_set_passthrough:
3830 * @parse: a #GstBaseParse
3831 * @passthrough: %TRUE if parser should run in passthrough mode
3833 * Set if the nature of the format or configuration does not allow (much)
3834 * parsing, and the parser should operate in passthrough mode (which only
3835 * applies when operating in push mode). That is, incoming buffers are
3836 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3837 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3838 * so subclass can perform as much or as little is appropriate for
3839 * passthrough semantics in @pre_push_frame.
3842 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3844 parse->priv->passthrough = passthrough;
3845 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3849 * gst_base_parse_set_pts_interpolation:
3850 * @parse: a #GstBaseParse
3851 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3853 * By default, the base class will guess PTS timestamps using a simple
3854 * interpolation (previous timestamp + duration), which is incorrect for
3855 * data streams with reordering, where PTS can go backward. Sub-classes
3856 * implementing such formats should disable PTS interpolation.
3859 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3860 gboolean pts_interpolate)
3862 parse->priv->pts_interpolate = pts_interpolate;
3863 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3864 (pts_interpolate) ? "yes" : "no");
3868 * gst_base_parse_set_infer_ts:
3869 * @parse: a #GstBaseParse
3870 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3872 * By default, the base class might try to infer PTS from DTS and vice
3873 * versa. While this is generally correct for audio data, it may not
3874 * be otherwise. Sub-classes implementing such formats should disable
3875 * timestamp inferring.
3878 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3880 parse->priv->infer_ts = infer_ts;
3881 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3885 * gst_base_parse_set_latency:
3886 * @parse: a #GstBaseParse
3887 * @min_latency: minimum parse latency
3888 * @max_latency: maximum parse latency
3890 * Sets the minimum and maximum (which may likely be equal) latency introduced
3891 * by the parsing process. If there is such a latency, which depends on the
3892 * particular parsing of the format, it typically corresponds to 1 frame duration.
3895 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3896 GstClockTime max_latency)
3898 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3899 g_return_if_fail (min_latency <= max_latency);
3901 GST_OBJECT_LOCK (parse);
3902 parse->priv->min_latency = min_latency;
3903 parse->priv->max_latency = max_latency;
3904 GST_OBJECT_UNLOCK (parse);
3905 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3906 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3907 GST_TIME_ARGS (max_latency));
3911 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3912 GstClockTime * duration)
3914 gboolean res = FALSE;
3916 g_return_val_if_fail (duration != NULL, FALSE);
3918 *duration = GST_CLOCK_TIME_NONE;
3919 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3920 GST_LOG_OBJECT (parse, "using provided duration");
3921 *duration = parse->priv->duration;
3923 } else if (parse->priv->duration != -1) {
3924 GST_LOG_OBJECT (parse, "converting provided duration");
3925 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3926 parse->priv->duration, format, (gint64 *) duration);
3927 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3928 GST_LOG_OBJECT (parse, "using estimated duration");
3929 *duration = parse->priv->estimated_duration;
3932 GST_LOG_OBJECT (parse, "cannot estimate duration");
3935 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3936 GST_TIME_ARGS (*duration));
3941 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3943 gboolean res = FALSE;
3946 pad = GST_BASE_PARSE_SRC_PAD (parse);
3948 switch (GST_QUERY_TYPE (query)) {
3949 case GST_QUERY_POSITION:
3954 GST_DEBUG_OBJECT (parse, "position query");
3955 gst_query_parse_position (query, &format, NULL);
3957 /* try upstream first */
3958 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3960 /* Fall back on interpreting segment */
3961 GST_OBJECT_LOCK (parse);
3962 if (format == GST_FORMAT_BYTES) {
3963 dest_value = parse->priv->offset;
3965 } else if (format == parse->segment.format &&
3966 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3967 dest_value = gst_segment_to_stream_time (&parse->segment,
3968 parse->segment.format, parse->segment.position);
3971 GST_OBJECT_UNLOCK (parse);
3973 /* no precise result, upstream no idea either, then best estimate */
3974 /* priv->offset is updated in both PUSH/PULL modes */
3975 res = gst_base_parse_convert (parse,
3976 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3979 gst_query_set_position (query, format, dest_value);
3983 case GST_QUERY_DURATION:
3986 GstClockTime duration;
3988 GST_DEBUG_OBJECT (parse, "duration query");
3989 gst_query_parse_duration (query, &format, NULL);
3991 /* consult upstream */
3992 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3994 /* otherwise best estimate from us */
3996 res = gst_base_parse_get_duration (parse, format, &duration);
3998 gst_query_set_duration (query, format, duration);
4002 case GST_QUERY_SEEKING:
4005 GstClockTime duration = GST_CLOCK_TIME_NONE;
4006 gboolean seekable = FALSE;
4008 GST_DEBUG_OBJECT (parse, "seeking query");
4009 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4011 /* consult upstream */
4012 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4014 /* we may be able to help if in TIME */
4015 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4016 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4017 /* already OK if upstream takes care */
4018 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4020 if (!(res && seekable)) {
4021 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4022 || duration == -1) {
4023 /* seekable if we still have a chance to get duration later on */
4025 parse->priv->upstream_seekable && parse->priv->update_interval;
4027 seekable = parse->priv->upstream_seekable;
4028 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4031 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4037 case GST_QUERY_FORMATS:
4038 gst_query_set_formatsv (query, 3, fmtlist);
4041 case GST_QUERY_CONVERT:
4043 GstFormat src_format, dest_format;
4044 gint64 src_value, dest_value;
4046 gst_query_parse_convert (query, &src_format, &src_value,
4047 &dest_format, &dest_value);
4049 res = gst_base_parse_convert (parse, src_format, src_value,
4050 dest_format, &dest_value);
4052 gst_query_set_convert (query, src_format, src_value,
4053 dest_format, dest_value);
4057 case GST_QUERY_LATENCY:
4059 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4061 GstClockTime min_latency, max_latency;
4063 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4064 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4065 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4066 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4068 GST_OBJECT_LOCK (parse);
4069 /* add our latency */
4070 min_latency += parse->priv->min_latency;
4071 if (max_latency == -1 || parse->priv->max_latency == -1)
4074 max_latency += parse->priv->max_latency;
4075 GST_OBJECT_UNLOCK (parse);
4077 gst_query_set_latency (query, live, min_latency, max_latency);
4081 case GST_QUERY_SEGMENT:
4086 format = parse->segment.format;
4089 gst_segment_to_stream_time (&parse->segment, format,
4090 parse->segment.start);
4091 if ((stop = parse->segment.stop) == -1)
4092 stop = parse->segment.duration;
4094 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4096 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4101 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4107 /* scans for a cluster start from @pos,
4108 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4109 static GstFlowReturn
4110 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4111 GstClockTime * time, GstClockTime * duration)
4113 GstBaseParseClass *klass;
4115 gboolean orig_drain, orig_discont;
4116 GstFlowReturn ret = GST_FLOW_OK;
4117 GstBuffer *buf = NULL;
4118 GstBaseParseFrame *sframe = NULL;
4120 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4121 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4122 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4124 klass = GST_BASE_PARSE_GET_CLASS (parse);
4126 *time = GST_CLOCK_TIME_NONE;
4127 *duration = GST_CLOCK_TIME_NONE;
4130 orig_offset = parse->priv->offset;
4131 orig_discont = parse->priv->discont;
4132 orig_drain = parse->priv->drain;
4134 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4135 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4137 /* jump elsewhere and locate next frame */
4138 parse->priv->offset = *pos;
4139 /* mark as scanning so frames don't get processed all the way */
4140 parse->priv->scanning = TRUE;
4141 ret = gst_base_parse_scan_frame (parse, klass);
4142 parse->priv->scanning = FALSE;
4143 /* retrieve frame found during scan */
4144 sframe = parse->priv->scanned_frame;
4145 parse->priv->scanned_frame = NULL;
4147 if (ret != GST_FLOW_OK || !sframe)
4150 /* get offset first, subclass parsing might dump other stuff in there */
4151 *pos = sframe->offset;
4152 buf = sframe->buffer;
4155 /* but it should provide proper time */
4156 *time = GST_BUFFER_TIMESTAMP (buf);
4157 *duration = GST_BUFFER_DURATION (buf);
4159 GST_LOG_OBJECT (parse,
4160 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4161 GST_TIME_ARGS (*time), *pos);
4165 gst_base_parse_frame_free (sframe);
4168 parse->priv->offset = orig_offset;
4169 parse->priv->discont = orig_discont;
4170 parse->priv->drain = orig_drain;
4175 /* bisect and scan through file for frame starting before @time,
4176 * returns OK and @time/@offset if found, NONE and/or error otherwise
4177 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4178 static GstFlowReturn
4179 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4182 GstFlowReturn ret = GST_FLOW_OK;
4183 gint64 lpos, hpos, newpos;
4184 GstClockTime time, ltime, htime, newtime, dur;
4185 gboolean cont = TRUE;
4186 const GstClockTime tolerance = TARGET_DIFFERENCE;
4187 const guint chunk = 4 * 1024;
4189 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4190 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4192 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4193 GST_TIME_ARGS (*_time));
4195 /* TODO also make keyframe aware if useful some day */
4210 /* do not know at first */
4212 *_time = GST_CLOCK_TIME_NONE;
4214 /* need initial positions; start and end */
4215 lpos = parse->priv->first_frame_offset;
4216 ltime = parse->priv->first_frame_pts;
4217 /* try other one if no luck */
4218 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4219 ltime = parse->priv->first_frame_dts;
4220 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4221 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4222 return GST_FLOW_ERROR;
4224 hpos = parse->priv->upstream_size;
4226 GST_DEBUG_OBJECT (parse,
4227 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4228 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4229 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4231 /* check preconditions are satisfied;
4232 * start and end are needed, except for special case where we scan for
4233 * last frame to determine duration */
4234 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4235 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4236 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4240 /* shortcut cases */
4243 } else if (time < ltime + tolerance) {
4247 } else if (time >= htime) {
4253 while (htime > ltime && cont) {
4254 GST_LOG_OBJECT (parse,
4255 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4256 GST_TIME_ARGS (ltime));
4257 GST_LOG_OBJECT (parse,
4258 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4259 GST_TIME_ARGS (htime));
4260 if (G_UNLIKELY (time == G_MAXINT64)) {
4262 } else if (G_LIKELY (hpos > lpos)) {
4264 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4267 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4269 /* we check this case once, but not forever, so break loop */
4274 newpos = CLAMP (newpos, lpos, hpos);
4275 GST_LOG_OBJECT (parse,
4276 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4277 GST_TIME_ARGS (time), newpos);
4279 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4280 if (ret == GST_FLOW_EOS) {
4281 /* heuristic HACK */
4282 hpos = MAX (lpos, hpos - chunk);
4284 } else if (ret != GST_FLOW_OK) {
4288 if (newtime == -1 || newpos == -1) {
4289 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4293 if (G_UNLIKELY (time == G_MAXINT64)) {
4296 if (GST_CLOCK_TIME_IS_VALID (dur))
4299 } else if (newtime > time) {
4301 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4303 } else if (newtime + tolerance > time) {
4304 /* close enough undershoot */
4308 } else if (newtime < ltime) {
4309 /* so a position beyond lpos resulted in earlier time than ltime ... */
4310 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4313 /* undershoot too far */
4314 newpos += newpos == lpos ? chunk : 0;
4315 lpos = CLAMP (newpos, lpos, hpos);
4321 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4322 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4327 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4328 gboolean before, GstClockTime * _ts)
4330 gint64 bytes = 0, ts = 0;
4331 GstIndexEntry *entry = NULL;
4333 if (time == GST_CLOCK_TIME_NONE) {
4339 GST_BASE_PARSE_INDEX_LOCK (parse);
4340 if (parse->priv->index) {
4341 /* Let's check if we have an index entry for that time */
4342 entry = gst_index_get_assoc_entry (parse->priv->index,
4343 parse->priv->index_id,
4344 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4345 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4349 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4350 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4352 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4353 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4354 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4356 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4357 GST_TIME_ARGS (time));
4360 ts = GST_CLOCK_TIME_NONE;
4363 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4372 /* returns TRUE if seek succeeded */
4374 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4379 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4380 gboolean flush, update, res = TRUE, accurate;
4381 gint64 start, stop, seekpos, seekstop;
4382 GstSegment seeksegment = { 0, };
4383 GstClockTime start_ts;
4385 GstEvent *segment_event;
4387 /* try upstream first, unless we're driving the streaming thread ourselves */
4388 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4389 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4394 gst_event_parse_seek (event, &rate, &format, &flags,
4395 &start_type, &start, &stop_type, &stop);
4396 seqnum = gst_event_get_seqnum (event);
4398 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4399 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4400 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4401 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4403 /* we can only handle TIME, so check if subclass can convert
4404 * to TIME format if it's some other format (such as DEFAULT) */
4405 if (format != GST_FORMAT_TIME) {
4406 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4407 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4409 goto no_convert_to_time;
4411 GST_INFO_OBJECT (parse, "converted %s format to start time "
4412 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4413 gst_format_get_name (format), GST_TIME_ARGS (start),
4414 GST_TIME_ARGS (stop));
4416 format = GST_FORMAT_TIME;
4419 /* no negative rates in push mode (unless upstream takes care of that, but
4420 * we've already tried upstream and it didn't handle the seek request) */
4421 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4424 if (start_type != GST_SEEK_TYPE_SET ||
4425 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4428 /* get flush flag */
4429 flush = flags & GST_SEEK_FLAG_FLUSH;
4431 /* copy segment, we need this because we still need the old
4432 * segment when we close the current segment. */
4433 gst_segment_copy_into (&parse->segment, &seeksegment);
4435 GST_DEBUG_OBJECT (parse, "configuring seek");
4436 gst_segment_do_seek (&seeksegment, rate, format, flags,
4437 start_type, start, stop_type, stop, &update);
4439 /* accurate seeking implies seek tables are used to obtain position,
4440 * and the requested segment is maintained exactly, not adjusted any way */
4441 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4443 /* maybe we can be accurate for (almost) free */
4444 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4445 #ifdef GST_BASEPARSE_MODIFICATION
4446 if (parse->priv->accurate_index_seek) {
4447 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4448 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4452 GST_DEBUG_OBJECT (parse, "accurate seek NOT possible");
4456 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4457 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4463 GstClockTime startpos;
4465 startpos = seeksegment.position;
4469 /* accurate requested, so ... seek a bit before target */
4470 if (startpos < parse->priv->lead_in_ts)
4473 startpos -= parse->priv->lead_in_ts;
4475 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4476 seeksegment.stop = seeksegment.start + seeksegment.duration;
4478 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4479 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4483 start_ts = seeksegment.position;
4487 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4488 seeksegment.stop = seeksegment.start + seeksegment.duration;
4490 if (!gst_base_parse_convert (parse, format, start_ts,
4491 GST_FORMAT_BYTES, &seekpos))
4492 goto convert_failed;
4493 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4494 GST_FORMAT_BYTES, &seekstop))
4495 goto convert_failed;
4498 GST_DEBUG_OBJECT (parse,
4499 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4501 GST_DEBUG_OBJECT (parse,
4502 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4503 seeksegment.stop, seekstop);
4505 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4508 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4511 if (parse->srcpad) {
4512 GstEvent *fevent = gst_event_new_flush_start ();
4513 GST_DEBUG_OBJECT (parse, "sending flush start");
4515 gst_event_set_seqnum (fevent, seqnum);
4517 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4518 /* unlock upstream pull_range */
4519 gst_pad_push_event (parse->sinkpad, fevent);
4522 gst_pad_pause_task (parse->sinkpad);
4525 /* we should now be able to grab the streaming thread because we stopped it
4526 * with the above flush/pause code */
4527 GST_PAD_STREAM_LOCK (parse->sinkpad);
4529 /* save current position */
4530 last_stop = parse->segment.position;
4531 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4534 /* now commit to new position */
4536 /* prepare for streaming again */
4538 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4539 GST_DEBUG_OBJECT (parse, "sending flush stop");
4540 gst_event_set_seqnum (fevent, seqnum);
4541 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4542 gst_pad_push_event (parse->sinkpad, fevent);
4543 gst_base_parse_clear_queues (parse);
4545 /* keep track of our position */
4546 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4547 seeksegment.format, parse->segment.position);
4550 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4552 /* store the newsegment event so it can be sent from the streaming thread. */
4553 /* This will be sent later in _loop() */
4554 segment_event = gst_event_new_segment (&parse->segment);
4555 gst_event_set_seqnum (segment_event, seqnum);
4556 parse->priv->pending_events =
4557 g_list_prepend (parse->priv->pending_events, segment_event);
4559 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4560 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4561 ", time = %" GST_TIME_FORMAT, format,
4562 GST_TIME_ARGS (parse->segment.start),
4563 GST_TIME_ARGS (parse->segment.stop),
4564 GST_TIME_ARGS (parse->segment.time));
4566 /* one last chance in pull mode to stay accurate;
4567 * maybe scan and subclass can find where to go */
4570 GstClockTime ts = seeksegment.position;
4572 gst_base_parse_locate_time (parse, &ts, &scanpos);
4576 /* running collected index now consists of several intervals,
4577 * so optimized check no longer possible */
4578 parse->priv->index_last_valid = FALSE;
4579 parse->priv->index_last_offset = 0;
4580 parse->priv->index_last_ts = 0;
4584 /* mark discont if we are going to stream from another position. */
4585 if (seekpos != parse->priv->offset) {
4586 GST_DEBUG_OBJECT (parse,
4587 "mark DISCONT, we did a seek to another position");
4588 parse->priv->offset = seekpos;
4589 parse->priv->last_offset = seekpos;
4590 parse->priv->seen_keyframe = FALSE;
4591 parse->priv->discont = TRUE;
4592 parse->priv->next_dts = start_ts;
4593 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4594 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4595 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4596 parse->priv->sync_offset = seekpos;
4597 parse->priv->exact_position = accurate;
4600 /* Start streaming thread if paused */
4601 gst_pad_start_task (parse->sinkpad,
4602 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4604 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4609 GstEvent *new_event;
4610 GstBaseParseSeek *seek;
4611 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4613 /* The only thing we need to do in PUSH-mode is to send the
4614 seek event (in bytes) to upstream. Segment / flush handling happens
4615 in corresponding src event handlers */
4616 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4617 if (seekstop >= 0 && seekstop <= seekpos)
4619 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4620 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4621 gst_event_set_seqnum (new_event, seqnum);
4623 /* store segment info so its precise details can be reconstructed when
4624 * receiving newsegment;
4625 * this matters for all details when accurate seeking,
4626 * is most useful to preserve NONE stop time otherwise */
4627 seek = g_new0 (GstBaseParseSeek, 1);
4628 seek->segment = seeksegment;
4629 seek->accurate = accurate;
4630 seek->offset = seekpos;
4631 seek->start_ts = start_ts;
4632 GST_OBJECT_LOCK (parse);
4633 /* less optimal, but preserves order */
4634 parse->priv->pending_seeks =
4635 g_slist_append (parse->priv->pending_seeks, seek);
4636 GST_OBJECT_UNLOCK (parse);
4638 res = gst_pad_push_event (parse->sinkpad, new_event);
4641 GST_OBJECT_LOCK (parse);
4642 parse->priv->pending_seeks =
4643 g_slist_remove (parse->priv->pending_seeks, seek);
4644 GST_OBJECT_UNLOCK (parse);
4650 gst_event_unref (event);
4656 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4662 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4668 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4669 "couldn't convert that into TIME format", gst_format_get_name (format));
4675 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4682 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4684 if (taglist == parse->priv->upstream_tags)
4687 if (parse->priv->upstream_tags) {
4688 gst_tag_list_unref (parse->priv->upstream_tags);
4689 parse->priv->upstream_tags = NULL;
4692 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4694 if (taglist != NULL)
4695 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4697 gst_base_parse_check_bitrate_tags (parse);
4702 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4704 GstBaseParse *parse = GST_BASE_PARSE (element);
4706 GST_BASE_PARSE_INDEX_LOCK (parse);
4707 if (parse->priv->index)
4708 gst_object_unref (parse->priv->index);
4710 parse->priv->index = gst_object_ref (index);
4711 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4712 &parse->priv->index_id);
4713 parse->priv->own_index = FALSE;
4715 parse->priv->index = NULL;
4717 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4721 gst_base_parse_get_index (GstElement * element)
4723 GstBaseParse *parse = GST_BASE_PARSE (element);
4724 GstIndex *result = NULL;
4726 GST_BASE_PARSE_INDEX_LOCK (parse);
4727 if (parse->priv->index)
4728 result = gst_object_ref (parse->priv->index);
4729 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4735 static GstStateChangeReturn
4736 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4738 GstBaseParse *parse;
4739 GstStateChangeReturn result;
4741 parse = GST_BASE_PARSE (element);
4743 switch (transition) {
4744 case GST_STATE_CHANGE_READY_TO_PAUSED:
4745 /* If this is our own index destroy it as the
4746 * old entries might be wrong for the new stream */
4747 GST_BASE_PARSE_INDEX_LOCK (parse);
4748 if (parse->priv->own_index) {
4749 gst_object_unref (parse->priv->index);
4750 parse->priv->index = NULL;
4751 parse->priv->own_index = FALSE;
4754 /* If no index was created, generate one */
4755 if (G_UNLIKELY (!parse->priv->index)) {
4756 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4758 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4759 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4760 &parse->priv->index_id);
4761 parse->priv->own_index = TRUE;
4763 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4769 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4771 switch (transition) {
4772 case GST_STATE_CHANGE_PAUSED_TO_READY:
4773 gst_base_parse_reset (parse);
4783 * gst_base_parse_set_ts_at_offset:
4784 * @parse: a #GstBaseParse
4785 * @offset: offset into current buffer
4787 * This function should only be called from a @handle_frame implementation.
4789 * #GstBaseParse creates initial timestamps for frames by using the last
4790 * timestamp seen in the stream before the frame starts. In certain
4791 * cases, the correct timestamps will occur in the stream after the
4792 * start of the frame, but before the start of the actual picture data.
4793 * This function can be used to set the timestamps based on the offset
4794 * into the frame data that the picture starts.
4799 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4801 GstClockTime pts, dts;
4803 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4805 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4806 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4808 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4809 GST_DEBUG_OBJECT (parse,
4810 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4811 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4813 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4814 parse->priv->prev_pts = parse->priv->next_pts = pts;
4816 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4817 parse->priv->prev_dts = parse->priv->next_dts = dts;
4821 * gst_base_parse_merge_tags:
4822 * @parse: a #GstBaseParse
4823 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4824 * previously-set tags
4825 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4827 * Sets the parser subclass's tags and how they should be merged with any
4828 * upstream stream tags. This will override any tags previously-set
4829 * with gst_base_parse_merge_tags().
4831 * Note that this is provided for convenience, and the subclass is
4832 * not required to use this and can still do tag handling on its own.
4837 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4838 GstTagMergeMode mode)
4840 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4841 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4842 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4844 GST_OBJECT_LOCK (parse);
4846 if (tags != parse->priv->parser_tags) {
4847 if (parse->priv->parser_tags) {
4848 gst_tag_list_unref (parse->priv->parser_tags);
4849 parse->priv->parser_tags = NULL;
4850 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4853 parse->priv->parser_tags = gst_tag_list_ref (tags);
4854 parse->priv->parser_tags_merge_mode = mode;
4857 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4858 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4860 gst_base_parse_check_bitrate_tags (parse);
4861 parse->priv->tags_changed = TRUE;
4864 GST_OBJECT_UNLOCK (parse);
4867 #ifdef GST_BASEPARSE_MODIFICATION
4869 gst_base_parse_get_upstream_size (GstBaseParse * parse,
4870 gint64 * upstream_size)
4872 GST_BASE_PARSE_INDEX_LOCK (parse);
4873 *upstream_size = parse->priv->upstream_size;
4874 GST_INFO_OBJECT (parse, "get upstream_size for child parser : (%"G_GUINT64_FORMAT")",
4875 parse->priv->upstream_size);
4876 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4880 gst_base_parse_get_index_last_offset (GstBaseParse * parse,
4881 gint64 * index_last_offset)
4883 GST_BASE_PARSE_INDEX_LOCK (parse);
4884 *index_last_offset = parse->priv->index_last_offset;
4885 GST_INFO_OBJECT (parse, "get index_last_offset for child parser : (%"G_GUINT64_FORMAT")",
4886 parse->priv->index_last_offset);
4887 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4891 gst_base_parse_get_index_last_ts (GstBaseParse * parse,
4892 GstClockTime * index_last_ts)
4894 GST_BASE_PARSE_INDEX_LOCK (parse);
4895 *index_last_ts = parse->priv->index_last_ts;
4896 GST_INFO_OBJECT (parse, "get index_last_ts for child parser : (%"GST_TIME_FORMAT")",
4897 GST_TIME_ARGS(parse->priv->index_last_ts));
4898 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4902 gst_base_parse_get_pad_mode (GstBaseParse * parse,
4903 GstPadMode * pad_mode)
4905 GST_BASE_PARSE_INDEX_LOCK (parse);
4906 *pad_mode = parse->priv->expected_pad_mode;
4907 GST_INFO_OBJECT (parse, "get pad_mode for child parse: mode num (%d)",
4908 parse->priv->expected_pad_mode);
4909 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4912 * Checks if accurate seek mode are avilable from sub-parse
4915 gst_base_parse_set_seek_mode (GstBaseParse * parse, gboolean seek_mode)
4917 g_return_if_fail (parse != NULL);
4918 parse->priv->accurate_index_seek = seek_mode;
4920 GST_INFO_OBJECT (parse, "accurate seek mode ON");
4922 GST_INFO_OBJECT (parse, "accurate seek mode OFF - for HTTP SEEK");