2 * Copyright (C) 2008 Nokia Corporation. All rights reserved.
3 * Contact: Stefan Kost <stefan.kost@nokia.com>
4 * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
5 * Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
6 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 * SECTION:gstbaseparse
26 * @short_description: Base class for stream parsers
27 * @see_also: #GstBaseTransform
29 * This base class is for parser elements that process data and splits it
30 * into separate audio/video/whatever frames.
34 * <listitem><para>provides one sink pad and one source pad</para></listitem>
35 * <listitem><para>handles state changes</para></listitem>
36 * <listitem><para>can operate in pull mode or push mode</para></listitem>
37 * <listitem><para>handles seeking in both modes</para></listitem>
38 * <listitem><para>handles events (SEGMENT/EOS/FLUSH)</para></listitem>
40 * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
42 * <listitem><para>handles flushing</para></listitem>
45 * The purpose of this base class is to provide the basic functionality of
46 * a parser and share a lot of rather complex code.
48 * Description of the parsing mechanism:
51 * <itemizedlist><title>Set-up phase</title>
53 * #GstBaseParse calls @start to inform subclass that data processing is
57 * #GstBaseParse class calls @set_sink_caps to inform the subclass about
58 * incoming sinkpad caps. Subclass could already set the srcpad caps
59 * accordingly, but this might be delayed until calling
60 * gst_base_parse_finish_frame() with a non-queued frame.
63 * At least at this point subclass needs to tell the #GstBaseParse class
64 * how big data chunks it wants to receive (min_frame_size). It can do
65 * this with gst_base_parse_set_min_frame_size().
68 * #GstBaseParse class sets up appropriate data passing mode (pull/push)
69 * and starts to process the data.
75 * <title>Parsing phase</title>
77 * #GstBaseParse gathers at least min_frame_size bytes of data either
78 * by pulling it from upstream or collecting buffers in an internal
82 * A buffer of (at least) min_frame_size bytes is passed to subclass with
83 * @handle_frame. Subclass checks the contents and can optionally
84 * return GST_FLOW_OK along with an amount of data to be skipped to find
85 * a valid frame (which will result in a subsequent DISCONT).
86 * If, otherwise, the buffer does not hold a complete frame,
87 * @handle_frame can merely return and will be called again when additional
88 * data is available. In push mode this amounts to an
89 * additional input buffer (thus minimal additional latency), in pull mode
90 * this amounts to some arbitrary reasonable buffer size increase.
91 * Of course, gst_base_parse_set_min_frame_size() could also be used if a
92 * very specific known amount of additional data is required.
93 * If, however, the buffer holds a complete valid frame, it can pass
94 * the size of this frame to gst_base_parse_finish_frame().
95 * If acting as a converter, it can also merely indicate consumed input data
96 * while simultaneously providing custom output data.
97 * Note that baseclass performs some processing (such as tracking
98 * overall consumed data rate versus duration) for each finished frame,
99 * but other state is only updated upon each call to @handle_frame
100 * (such as tracking upstream input timestamp).
102 * Subclass is also responsible for setting the buffer metadata
103 * (e.g. buffer timestamp and duration, or keyframe if applicable).
104 * (although the latter can also be done by #GstBaseParse if it is
105 * appropriately configured, see below). Frame is provided with
106 * timestamp derived from upstream (as much as generally possible),
107 * duration obtained from configuration (see below), and offset
108 * if meaningful (in pull mode).
110 * Note that @check_valid_frame might receive any small
111 * amount of input data when leftover data is being drained (e.g. at EOS).
114 * As part of finish frame processing,
115 * just prior to actually pushing the buffer in question,
116 * it is passed to @pre_push_frame which gives subclass yet one
117 * last chance to examine buffer metadata, or to send some custom (tag)
118 * events, or to perform custom (segment) filtering.
121 * During the parsing process #GstBaseParseClass will handle both srcpad
122 * and sinkpad events. They will be passed to subclass if @event or
123 * @src_event callbacks have been provided.
128 * <itemizedlist><title>Shutdown phase</title>
130 * #GstBaseParse class calls @stop to inform the subclass that data
131 * parsing will be stopped.
137 * Subclass is responsible for providing pad template caps for
138 * source and sink pads. The pads need to be named "sink" and "src". It also
139 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
140 * when base class calls subclass' @set_sink_caps function).
142 * This base class uses %GST_FORMAT_DEFAULT as a meaning of frames. So,
143 * subclass conversion routine needs to know that conversion from
144 * %GST_FORMAT_TIME to %GST_FORMAT_DEFAULT must return the
145 * frame number that can be found from the given byte position.
147 * #GstBaseParse uses subclasses conversion methods also for seeking (or
148 * otherwise uses its own default one, see also below).
150 * Subclass @start and @stop functions will be called to inform the beginning
151 * and end of data processing.
153 * Things that subclass need to take care of:
155 * <listitem><para>Provide pad templates</para></listitem>
157 * Fixate the source pad caps when appropriate
160 * Inform base class how big data chunks should be retrieved. This is
161 * done with gst_base_parse_set_min_frame_size() function.
164 * Examine data chunks passed to subclass with @handle_frame and pass
165 * proper frame(s) to gst_base_parse_finish_frame(), and setting src pad
166 * caps and timestamps on frame.
168 * <listitem><para>Provide conversion functions</para></listitem>
170 * Update the duration information with gst_base_parse_set_duration()
173 * Optionally passthrough using gst_base_parse_set_passthrough()
176 * Configure various baseparse parameters using
177 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
178 * and gst_base_parse_set_frame_rate().
181 * In particular, if subclass is unable to determine a duration, but
182 * parsing (or specs) yields a frames per seconds rate, then this can be
183 * provided to #GstBaseParse to enable it to cater for
184 * buffer time metadata (which will be taken from upstream as much as
185 * possible). Internally keeping track of frame durations and respective
186 * sizes that have been pushed provides #GstBaseParse with an estimated
187 * bitrate. A default @convert (used if not overridden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
221 #define MAX_INDEX_ENTRIES 4096
222 #define UPDATE_THRESHOLD 2
224 #define ABSDIFF(a,b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
226 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
227 #define GST_CAT_DEFAULT gst_base_parse_debug
229 /* Supported formats */
230 static const GstFormat fmtlist[] = {
237 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
238 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
240 struct _GstBaseParsePrivate
247 GstFormat duration_fmt;
248 gint64 estimated_duration;
249 gint64 estimated_drift;
251 guint min_frame_size;
252 gboolean disable_passthrough;
253 gboolean passthrough;
254 gboolean pts_interpolate;
257 gboolean has_timing_info;
258 guint fps_num, fps_den;
259 gint update_interval;
261 guint lead_in, lead_out;
262 GstClockTime lead_in_ts, lead_out_ts;
263 GstClockTime min_latency, max_latency;
272 GstClockTime next_pts;
273 GstClockTime next_dts;
274 GstClockTime prev_pts;
275 GstClockTime prev_dts;
276 GstClockTime frame_duration;
277 gboolean seen_keyframe;
283 guint64 data_bytecount;
284 guint64 acc_duration;
285 GstClockTime first_frame_pts;
286 GstClockTime first_frame_dts;
287 gint64 first_frame_offset;
289 gboolean post_min_bitrate;
290 gboolean post_avg_bitrate;
291 gboolean post_max_bitrate;
296 guint posted_avg_bitrate;
298 /* frames/buffers that are queued and ready to go on OK */
299 GQueue queued_frames;
303 /* index entry storage, either ours or provided */
309 /* seek table entries only maintained if upstream is BYTE seekable */
310 gboolean upstream_seekable;
311 gboolean upstream_has_duration;
312 gint64 upstream_size;
313 GstFormat upstream_format;
314 /* minimum distance between two index entries */
315 GstClockTimeDiff idx_interval;
316 guint64 idx_byte_interval;
317 /* ts and offset of last entry added */
318 GstClockTime index_last_ts;
319 gint64 index_last_offset;
320 gboolean index_last_valid;
322 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
323 gboolean exact_position;
324 /* seek events are temporarily kept to match them with newsegments */
325 GSList *pending_seeks;
327 /* reverse playback */
328 GSList *buffers_pending;
329 GSList *buffers_head;
330 GSList *buffers_queued;
331 GSList *buffers_send;
332 GstClockTime last_pts;
333 GstClockTime last_dts;
336 /* Pending serialized events */
337 GList *pending_events;
339 /* If baseparse has checked the caps to identify if it is
340 * handling video or audio */
341 gboolean checked_media;
343 /* offset of last parsed frame/data */
345 /* force a new frame, regardless of offset */
347 /* whether we are merely scanning for a frame */
349 /* ... and resulting frame, if any */
350 GstBaseParseFrame *scanned_frame;
352 /* TRUE if we're still detecting the format, i.e.
353 * if ::detect() is still called for future buffers */
355 GList *detect_buffers;
356 guint detect_buffers_size;
358 /* True when no buffers have been received yet */
359 gboolean first_buffer;
361 /* if TRUE, a STREAM_START event needs to be pushed */
362 gboolean push_stream_start;
364 /* When we need to skip more data than we have currently */
367 /* Tag handling (stream tags only, global tags are passed through as-is) */
368 GstTagList *upstream_tags;
369 GstTagList *parser_tags;
370 GstTagMergeMode parser_tags_merge_mode;
371 gboolean tags_changed;
374 typedef struct _GstBaseParseSeek
379 GstClockTime start_ts;
382 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
387 PROP_DISABLE_PASSTHROUGH,
391 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
392 g_mutex_lock (&parse->priv->index_lock);
393 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
394 g_mutex_unlock (&parse->priv->index_lock);
396 static GstElementClass *parent_class = NULL;
398 static void gst_base_parse_class_init (GstBaseParseClass * klass);
399 static void gst_base_parse_init (GstBaseParse * parse,
400 GstBaseParseClass * klass);
403 gst_base_parse_get_type (void)
405 static volatile gsize base_parse_type = 0;
407 if (g_once_init_enter (&base_parse_type)) {
408 static const GTypeInfo base_parse_info = {
409 sizeof (GstBaseParseClass),
410 (GBaseInitFunc) NULL,
411 (GBaseFinalizeFunc) NULL,
412 (GClassInitFunc) gst_base_parse_class_init,
415 sizeof (GstBaseParse),
417 (GInstanceInitFunc) gst_base_parse_init,
421 _type = g_type_register_static (GST_TYPE_ELEMENT,
422 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
423 g_once_init_leave (&base_parse_type, _type);
425 return (GType) base_parse_type;
428 static void gst_base_parse_finalize (GObject * object);
430 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
431 GstStateChange transition);
432 static void gst_base_parse_reset (GstBaseParse * parse);
435 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
436 static GstIndex *gst_base_parse_get_index (GstElement * element);
439 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
441 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
442 GstObject * parent, GstPadMode mode, gboolean active);
443 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
445 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
446 GstTagList * taglist);
448 static void gst_base_parse_set_property (GObject * object, guint prop_id,
449 const GValue * value, GParamSpec * pspec);
450 static void gst_base_parse_get_property (GObject * object, guint prop_id,
451 GValue * value, GParamSpec * pspec);
453 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
455 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
458 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
460 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
463 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
465 static void gst_base_parse_loop (GstPad * pad);
467 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
468 GstBaseParseFrame * frame);
470 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
473 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
476 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
478 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
481 static void gst_base_parse_drain (GstBaseParse * parse);
483 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
484 GstClockTime time, gboolean before, GstClockTime * _ts);
485 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
486 GstClockTime * _time, gint64 * _offset);
488 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
489 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
491 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
493 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
495 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
497 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
500 gst_base_parse_clear_queues (GstBaseParse * parse)
502 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
503 g_slist_free (parse->priv->buffers_queued);
504 parse->priv->buffers_queued = NULL;
505 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
507 g_slist_free (parse->priv->buffers_pending);
508 parse->priv->buffers_pending = NULL;
509 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
510 g_slist_free (parse->priv->buffers_head);
511 parse->priv->buffers_head = NULL;
512 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
513 g_slist_free (parse->priv->buffers_send);
514 parse->priv->buffers_send = NULL;
516 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
517 g_list_free (parse->priv->detect_buffers);
518 parse->priv->detect_buffers = NULL;
519 parse->priv->detect_buffers_size = 0;
521 g_queue_foreach (&parse->priv->queued_frames,
522 (GFunc) gst_base_parse_frame_free, NULL);
523 g_queue_clear (&parse->priv->queued_frames);
525 gst_buffer_replace (&parse->priv->cache, NULL);
527 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
528 g_list_free (parse->priv->pending_events);
529 parse->priv->pending_events = NULL;
531 parse->priv->checked_media = FALSE;
535 gst_base_parse_finalize (GObject * object)
537 GstBaseParse *parse = GST_BASE_PARSE (object);
539 g_object_unref (parse->priv->adapter);
541 if (parse->priv->index) {
542 gst_object_unref (parse->priv->index);
543 parse->priv->index = NULL;
545 g_mutex_clear (&parse->priv->index_lock);
547 gst_base_parse_clear_queues (parse);
549 G_OBJECT_CLASS (parent_class)->finalize (object);
553 gst_base_parse_class_init (GstBaseParseClass * klass)
555 GObjectClass *gobject_class;
556 GstElementClass *gstelement_class;
558 gobject_class = G_OBJECT_CLASS (klass);
559 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
560 parent_class = g_type_class_peek_parent (klass);
562 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
563 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
564 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
567 * GstBaseParse:disable-passthrough:
569 * If set to %TRUE, baseparse will unconditionally force parsing of the
570 * incoming data. This can be required in the rare cases where the incoming
571 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
572 * force validation and parsing of the incoming data.
573 * If set to %FALSE, decision of whether to parse the data or not is up to
574 * the implementation (standard behaviour).
576 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
577 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
578 "Force processing (disables passthrough)",
579 DEFAULT_DISABLE_PASSTHROUGH,
580 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
582 gstelement_class = (GstElementClass *) klass;
583 gstelement_class->change_state =
584 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
587 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
588 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
591 /* Default handlers */
592 klass->sink_event = gst_base_parse_sink_event_default;
593 klass->src_event = gst_base_parse_src_event_default;
594 klass->sink_query = gst_base_parse_sink_query_default;
595 klass->src_query = gst_base_parse_src_query_default;
596 klass->convert = gst_base_parse_convert_default;
598 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
599 "baseparse element");
603 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
605 GstPadTemplate *pad_template;
607 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
609 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
612 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
613 g_return_if_fail (pad_template != NULL);
614 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
615 gst_pad_set_event_function (parse->sinkpad,
616 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
617 gst_pad_set_query_function (parse->sinkpad,
618 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
619 gst_pad_set_chain_function (parse->sinkpad,
620 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
621 gst_pad_set_activate_function (parse->sinkpad,
622 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
623 gst_pad_set_activatemode_function (parse->sinkpad,
624 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
625 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
626 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
628 GST_DEBUG_OBJECT (parse, "sinkpad created");
631 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
632 g_return_if_fail (pad_template != NULL);
633 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
634 gst_pad_set_event_function (parse->srcpad,
635 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
636 gst_pad_set_query_function (parse->srcpad,
637 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
638 gst_pad_use_fixed_caps (parse->srcpad);
639 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
640 GST_DEBUG_OBJECT (parse, "src created");
642 g_queue_init (&parse->priv->queued_frames);
644 parse->priv->adapter = gst_adapter_new ();
646 parse->priv->pad_mode = GST_PAD_MODE_NONE;
648 g_mutex_init (&parse->priv->index_lock);
651 gst_base_parse_reset (parse);
652 GST_DEBUG_OBJECT (parse, "init ok");
654 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
656 parse->priv->upstream_tags = NULL;
657 parse->priv->parser_tags = NULL;
658 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
662 gst_base_parse_set_property (GObject * object, guint prop_id,
663 const GValue * value, GParamSpec * pspec)
665 GstBaseParse *parse = GST_BASE_PARSE (object);
668 case PROP_DISABLE_PASSTHROUGH:
669 parse->priv->disable_passthrough = g_value_get_boolean (value);
672 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
678 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
681 GstBaseParse *parse = GST_BASE_PARSE (object);
684 case PROP_DISABLE_PASSTHROUGH:
685 g_value_set_boolean (value, parse->priv->disable_passthrough);
688 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
693 static GstBaseParseFrame *
694 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
696 GstBaseParseFrame *copy;
698 copy = g_slice_dup (GstBaseParseFrame, frame);
699 copy->buffer = gst_buffer_ref (frame->buffer);
700 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
702 GST_TRACE ("copied frame %p -> %p", frame, copy);
708 gst_base_parse_frame_free (GstBaseParseFrame * frame)
710 GST_TRACE ("freeing frame %p", frame);
713 gst_buffer_unref (frame->buffer);
714 frame->buffer = NULL;
717 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
718 g_slice_free (GstBaseParseFrame, frame);
720 memset (frame, 0, sizeof (*frame));
724 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
725 (GBoxedCopyFunc) gst_base_parse_frame_copy,
726 (GBoxedFreeFunc) gst_base_parse_frame_free);
729 * gst_base_parse_frame_init:
730 * @frame: #GstBaseParseFrame.
732 * Sets a #GstBaseParseFrame to initial state. Currently this means
733 * all public fields are zero-ed and a private flag is set to make
734 * sure gst_base_parse_frame_free() only frees the contents but not
735 * the actual frame. Use this function to initialise a #GstBaseParseFrame
736 * allocated on the stack.
739 gst_base_parse_frame_init (GstBaseParseFrame * frame)
741 memset (frame, 0, sizeof (GstBaseParseFrame));
742 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
743 GST_TRACE ("inited frame %p", frame);
747 * gst_base_parse_frame_new:
748 * @buffer: (transfer none): a #GstBuffer
750 * @overhead: number of bytes in this frame which should be counted as
751 * metadata overhead, ie. not used to calculate the average bitrate.
752 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
754 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
755 * elements written in C should usually allocate the frame on the stack and
756 * then use gst_base_parse_frame_init() to initialise it.
758 * Returns: a newly-allocated #GstBaseParseFrame. Free with
759 * gst_base_parse_frame_free() when no longer needed.
762 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
765 GstBaseParseFrame *frame;
767 frame = g_slice_new0 (GstBaseParseFrame);
768 frame->buffer = gst_buffer_ref (buffer);
770 GST_TRACE ("created frame %p", frame);
775 gst_base_parse_update_flags (GstBaseParse * parse)
779 /* set flags one by one for clarity */
780 if (G_UNLIKELY (parse->priv->drain))
781 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
783 /* losing sync is pretty much a discont (and vice versa), no ? */
784 if (G_UNLIKELY (parse->priv->discont))
785 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
789 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
791 if (G_UNLIKELY (parse->priv->discont)) {
792 GST_DEBUG_OBJECT (parse, "marking DISCONT");
793 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
795 GST_BUFFER_FLAG_UNSET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
798 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
799 GST_LOG_OBJECT (parse, "marking as new frame");
800 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
803 frame->offset = parse->priv->prev_offset = parse->priv->offset;
807 gst_base_parse_reset (GstBaseParse * parse)
809 GST_OBJECT_LOCK (parse);
810 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
811 parse->priv->duration = -1;
812 parse->priv->min_frame_size = 1;
813 parse->priv->discont = TRUE;
814 parse->priv->flushing = FALSE;
815 parse->priv->saw_gaps = FALSE;
816 parse->priv->offset = 0;
817 parse->priv->sync_offset = 0;
818 parse->priv->update_interval = -1;
819 parse->priv->fps_num = parse->priv->fps_den = 0;
820 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
821 parse->priv->lead_in = parse->priv->lead_out = 0;
822 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
823 parse->priv->bitrate = 0;
824 parse->priv->framecount = 0;
825 parse->priv->bytecount = 0;
826 parse->priv->acc_duration = 0;
827 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
828 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
829 parse->priv->first_frame_offset = -1;
830 parse->priv->estimated_duration = -1;
831 parse->priv->estimated_drift = 0;
832 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
833 parse->priv->next_dts = 0;
834 parse->priv->syncable = TRUE;
835 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
836 parse->priv->passthrough = FALSE;
837 parse->priv->pts_interpolate = TRUE;
838 parse->priv->infer_ts = TRUE;
839 parse->priv->has_timing_info = FALSE;
840 parse->priv->min_bitrate = G_MAXUINT;
841 parse->priv->max_bitrate = 0;
842 parse->priv->avg_bitrate = 0;
843 parse->priv->posted_avg_bitrate = 0;
845 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
846 parse->priv->index_last_offset = -1;
847 parse->priv->index_last_valid = TRUE;
848 parse->priv->upstream_seekable = FALSE;
849 parse->priv->upstream_size = 0;
850 parse->priv->upstream_has_duration = FALSE;
851 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
852 parse->priv->idx_interval = 0;
853 parse->priv->idx_byte_interval = 0;
854 parse->priv->exact_position = TRUE;
855 parse->priv->seen_keyframe = FALSE;
856 parse->priv->checked_media = FALSE;
858 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
859 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
860 parse->priv->last_offset = 0;
862 parse->priv->skip = 0;
864 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
866 g_list_free (parse->priv->pending_events);
867 parse->priv->pending_events = NULL;
869 if (parse->priv->cache) {
870 gst_buffer_unref (parse->priv->cache);
871 parse->priv->cache = NULL;
874 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
875 g_slist_free (parse->priv->pending_seeks);
876 parse->priv->pending_seeks = NULL;
878 if (parse->priv->adapter)
879 gst_adapter_clear (parse->priv->adapter);
881 gst_base_parse_set_upstream_tags (parse, NULL);
883 if (parse->priv->parser_tags) {
884 gst_tag_list_unref (parse->priv->parser_tags);
885 parse->priv->parser_tags = NULL;
887 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
889 parse->priv->new_frame = TRUE;
891 parse->priv->first_buffer = TRUE;
893 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
894 g_list_free (parse->priv->detect_buffers);
895 parse->priv->detect_buffers = NULL;
896 parse->priv->detect_buffers_size = 0;
897 GST_OBJECT_UNLOCK (parse);
901 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
903 gboolean got_tag = FALSE;
906 if (parse->priv->upstream_tags != NULL)
907 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
909 if (!got_tag && parse->priv->parser_tags != NULL)
910 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
915 /* check if upstream or subclass tags contain bitrates already */
917 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
919 parse->priv->post_min_bitrate =
920 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
921 parse->priv->post_avg_bitrate =
922 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
923 parse->priv->post_max_bitrate =
924 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
927 /* Queues new tag event with the current combined state of the stream tags
928 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
930 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
932 GstTagList *merged_tags;
934 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
935 parse->priv->upstream_tags);
936 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
937 parse->priv->parser_tags);
938 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
941 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
942 parse->priv->parser_tags_merge_mode);
944 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
946 if (merged_tags == NULL)
949 if (gst_tag_list_is_empty (merged_tags)) {
950 gst_tag_list_unref (merged_tags);
954 /* only add bitrate tags to non-empty taglists for now, and only if neither
955 * upstream tags nor the subclass sets the bitrate tag in question already */
956 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
957 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
958 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MINIMUM_BITRATE,
959 parse->priv->min_bitrate, NULL);
961 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
962 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
963 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MAXIMUM_BITRATE,
964 parse->priv->max_bitrate, NULL);
966 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
967 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
968 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
969 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_BITRATE,
970 parse->priv->avg_bitrate, NULL);
973 parse->priv->pending_events =
974 g_list_prepend (parse->priv->pending_events,
975 gst_event_new_tag (merged_tags));
978 /* gst_base_parse_parse_frame:
979 * @parse: #GstBaseParse.
980 * @buffer: #GstBuffer.
982 * Default callback for parse_frame.
985 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
987 GstBuffer *buffer = frame->buffer;
989 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
990 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
991 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
993 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
994 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
995 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
997 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
998 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
999 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
1004 /* gst_base_parse_convert:
1005 * @parse: #GstBaseParse.
1006 * @src_format: #GstFormat describing the source format.
1007 * @src_value: Source value to be converted.
1008 * @dest_format: #GstFormat defining the converted format.
1009 * @dest_value: Pointer where the conversion result will be put.
1011 * Converts using configured "convert" vmethod in #GstBaseParse class.
1013 * Returns: %TRUE if conversion was successful.
1016 gst_base_parse_convert (GstBaseParse * parse,
1017 GstFormat src_format,
1018 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1020 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1023 g_return_val_if_fail (dest_value != NULL, FALSE);
1025 if (!klass->convert)
1028 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
1030 #ifndef GST_DISABLE_GST_DEBUG
1033 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1034 GST_LOG_OBJECT (parse,
1035 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1036 GST_TIME_ARGS (src_value), *dest_value);
1037 } else if (dest_format == GST_FORMAT_TIME &&
1038 src_format == GST_FORMAT_BYTES) {
1039 GST_LOG_OBJECT (parse,
1040 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1041 src_value, GST_TIME_ARGS (*dest_value));
1043 GST_LOG_OBJECT (parse,
1044 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1045 GST_STR_NULL (gst_format_get_name (src_format)),
1046 GST_STR_NULL (gst_format_get_name (dest_format)),
1047 src_value, *dest_value);
1050 GST_DEBUG_OBJECT (parse, "conversion failed");
1059 update_upstream_provided (GQuark field_id, const GValue * value,
1062 GstCaps *default_caps = user_data;
1066 caps_size = gst_caps_get_size (default_caps);
1067 for (i = 0; i < caps_size; i++) {
1068 GstStructure *structure = gst_caps_get_structure (default_caps, i);
1069 if (gst_structure_id_has_field (structure, field_id))
1070 gst_structure_id_set_value (structure, field_id, value);
1077 gst_base_parse_negotiate_default_caps (GstBaseParse * parse)
1079 GstCaps *caps, *templcaps;
1080 GstCaps *sinkcaps = NULL;
1081 GstCaps *default_caps = NULL;
1082 GstStructure *structure;
1084 templcaps = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD (parse));
1085 caps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), templcaps);
1087 gst_caps_unref (templcaps);
1092 if (!caps || gst_caps_is_empty (caps) || gst_caps_is_any (caps)) {
1096 GST_LOG_OBJECT (parse, "peer caps %" GST_PTR_FORMAT, caps);
1098 /* before fixating, try to use whatever upstream provided */
1099 default_caps = gst_caps_copy (caps);
1100 sinkcaps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
1102 GST_LOG_OBJECT (parse, "current caps %" GST_PTR_FORMAT " for sinkpad",
1106 structure = gst_caps_get_structure (sinkcaps, 0);
1107 gst_structure_foreach (structure, update_upstream_provided, default_caps);
1110 default_caps = gst_caps_fixate (default_caps);
1112 if (!default_caps) {
1113 GST_WARNING_OBJECT (parse, "Failed to create default caps !");
1117 GST_INFO_OBJECT (parse,
1118 "Chose default caps %" GST_PTR_FORMAT " for initial gap", default_caps);
1120 gst_caps_unref (sinkcaps);
1121 gst_caps_unref (caps);
1123 return default_caps;
1128 gst_caps_unref (caps);
1130 gst_caps_unref (sinkcaps);
1135 /* gst_base_parse_sink_event:
1136 * @pad: #GstPad that received the event.
1137 * @event: #GstEvent to be handled.
1139 * Handler for sink pad events.
1141 * Returns: %TRUE if the event was handled.
1144 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1146 GstBaseParse *parse = GST_BASE_PARSE (parent);
1147 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1150 ret = bclass->sink_event (parse, event);
1155 /* gst_base_parse_sink_event_default:
1156 * @parse: #GstBaseParse.
1157 * @event: #GstEvent to be handled.
1159 * Element-level event handler function.
1161 * The event will be unreffed only if it has been handled and this
1162 * function returns %TRUE
1164 * Returns: %TRUE if the event was handled and not need forwarding.
1167 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1169 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1170 gboolean ret = FALSE;
1171 gboolean forward_immediate = FALSE;
1173 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1174 GST_EVENT_TYPE_NAME (event));
1176 switch (GST_EVENT_TYPE (event)) {
1177 case GST_EVENT_CAPS:
1181 gst_event_parse_caps (event, &caps);
1182 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1184 if (klass->set_sink_caps)
1185 ret = klass->set_sink_caps (parse, caps);
1189 /* will send our own caps downstream */
1190 gst_event_unref (event);
1194 case GST_EVENT_SEGMENT:
1196 const GstSegment *in_segment;
1197 GstSegment out_segment;
1198 gint64 offset = 0, next_dts;
1199 guint32 seqnum = gst_event_get_seqnum (event);
1201 gst_event_parse_segment (event, &in_segment);
1202 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1203 out_segment.rate = in_segment->rate;
1204 out_segment.applied_rate = in_segment->applied_rate;
1206 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1208 parse->priv->upstream_format = in_segment->format;
1209 if (in_segment->format == GST_FORMAT_BYTES) {
1210 GstBaseParseSeek *seek = NULL;
1213 /* stop time is allowed to be open-ended, but not start & pos */
1214 offset = in_segment->time;
1216 GST_OBJECT_LOCK (parse);
1217 for (node = parse->priv->pending_seeks; node; node = node->next) {
1218 GstBaseParseSeek *tmp = node->data;
1220 if (tmp->offset == offset) {
1225 parse->priv->pending_seeks =
1226 g_slist_remove (parse->priv->pending_seeks, seek);
1227 GST_OBJECT_UNLOCK (parse);
1230 GST_DEBUG_OBJECT (parse,
1231 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1232 seek->accurate ? " accurate" : "", &seek->segment);
1234 out_segment.start = seek->segment.start;
1235 out_segment.stop = seek->segment.stop;
1236 out_segment.time = seek->segment.start;
1238 next_dts = seek->start_ts;
1239 parse->priv->exact_position = seek->accurate;
1242 /* best attempt convert */
1243 /* as these are only estimates, stop is kept open-ended to avoid
1244 * premature cutting */
1245 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1246 GST_FORMAT_TIME, (gint64 *) & next_dts);
1248 out_segment.start = next_dts;
1249 out_segment.stop = GST_CLOCK_TIME_NONE;
1250 out_segment.time = next_dts;
1252 parse->priv->exact_position = (in_segment->start == 0);
1255 gst_event_unref (event);
1257 event = gst_event_new_segment (&out_segment);
1258 gst_event_set_seqnum (event, seqnum);
1260 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1261 GST_SEGMENT_FORMAT, in_segment);
1263 } else if (in_segment->format != GST_FORMAT_TIME) {
1264 /* Unknown incoming segment format. Output a default open-ended
1266 gst_event_unref (event);
1268 out_segment.start = 0;
1269 out_segment.stop = GST_CLOCK_TIME_NONE;
1270 out_segment.time = 0;
1272 event = gst_event_new_segment (&out_segment);
1273 gst_event_set_seqnum (event, seqnum);
1277 /* not considered BYTE seekable if it is talking to us in TIME,
1278 * whatever else it might claim */
1279 parse->priv->upstream_seekable = FALSE;
1280 next_dts = in_segment->start;
1281 gst_event_copy_segment (event, &out_segment);
1284 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1287 gst_segment_set_newsegment (&parse->segment, update, rate,
1288 applied_rate, format, start, stop, start);
1293 /* save the segment for later, right before we push a new buffer so that
1294 * the caps are fixed and the next linked element can receive
1295 * the segment but finish the current segment */
1296 GST_DEBUG_OBJECT (parse, "draining current segment");
1297 if (in_segment->rate > 0.0)
1298 gst_base_parse_drain (parse);
1300 gst_base_parse_finish_fragment (parse, FALSE);
1301 gst_adapter_clear (parse->priv->adapter);
1303 parse->priv->offset = offset;
1304 parse->priv->sync_offset = offset;
1305 parse->priv->next_dts = next_dts;
1306 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1307 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1308 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1309 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1310 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1311 parse->priv->discont = TRUE;
1312 parse->priv->seen_keyframe = FALSE;
1313 parse->priv->skip = 0;
1317 case GST_EVENT_SEGMENT_DONE:
1318 /* need to drain now, rather than upon a new segment,
1319 * since that would have SEGMENT_DONE come before potential
1320 * delayed last part of the current segment */
1321 GST_DEBUG_OBJECT (parse, "draining current segment");
1322 if (parse->segment.rate > 0.0)
1323 gst_base_parse_drain (parse);
1325 gst_base_parse_finish_fragment (parse, FALSE);
1326 /* Also forward event immediately, there might be no new data
1327 * coming afterwards that would allow us to forward it later */
1328 forward_immediate = TRUE;
1331 case GST_EVENT_FLUSH_START:
1332 GST_OBJECT_LOCK (parse);
1333 parse->priv->flushing = TRUE;
1334 GST_OBJECT_UNLOCK (parse);
1337 case GST_EVENT_FLUSH_STOP:
1338 gst_adapter_clear (parse->priv->adapter);
1339 gst_base_parse_clear_queues (parse);
1340 parse->priv->flushing = FALSE;
1341 parse->priv->discont = TRUE;
1342 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1343 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1344 parse->priv->new_frame = TRUE;
1345 parse->priv->skip = 0;
1347 forward_immediate = TRUE;
1351 if (parse->segment.rate > 0.0)
1352 gst_base_parse_drain (parse);
1354 gst_base_parse_finish_fragment (parse, TRUE);
1356 /* If we STILL have zero frames processed, fire an error */
1357 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1358 !parse->priv->first_buffer) {
1359 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1360 ("No valid frames found before end of stream"), (NULL));
1363 if (!parse->priv->saw_gaps
1364 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1365 /* We've not posted bitrate tags yet - do so now */
1366 gst_base_parse_queue_tag_event_update (parse);
1369 /* newsegment and other serialized events before eos */
1370 gst_base_parse_push_pending_events (parse);
1372 forward_immediate = TRUE;
1374 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1375 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1376 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1377 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1380 const GstStructure *s;
1381 gboolean ev_still_state;
1383 s = gst_event_get_structure (event);
1385 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1386 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1387 if (ev_still_state) {
1388 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1389 if (parse->segment.rate > 0.0)
1390 gst_base_parse_drain (parse);
1392 gst_base_parse_finish_fragment (parse, TRUE);
1394 forward_immediate = TRUE;
1400 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1402 /* Ensure we have caps before forwarding the event */
1403 if (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (parse))) {
1404 GstCaps *default_caps = NULL;
1405 if ((default_caps = gst_base_parse_negotiate_default_caps (parse))) {
1406 GST_DEBUG_OBJECT (parse,
1407 "Store caps event to pending list for initial pre-rolling");
1408 parse->priv->pending_events =
1409 g_list_prepend (parse->priv->pending_events,
1410 gst_event_new_caps (default_caps));
1411 gst_caps_unref (default_caps);
1413 gst_event_unref (event);
1416 GST_ELEMENT_ERROR (parse, STREAM, FORMAT, (NULL),
1417 ("Parser output not negotiated before GAP event."));
1422 gst_base_parse_push_pending_events (parse);
1424 if (parse->segment.rate > 0.0)
1425 gst_base_parse_drain (parse);
1427 gst_base_parse_finish_fragment (parse, TRUE);
1428 forward_immediate = TRUE;
1429 parse->priv->saw_gaps = TRUE;
1434 GstTagList *tags = NULL;
1436 gst_event_parse_tag (event, &tags);
1438 /* We only care about stream tags here, global tags we just forward */
1439 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1442 gst_base_parse_set_upstream_tags (parse, tags);
1443 gst_base_parse_queue_tag_event_update (parse);
1444 parse->priv->tags_changed = FALSE;
1445 gst_event_unref (event);
1450 case GST_EVENT_STREAM_START:
1452 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1453 forward_immediate = TRUE;
1455 gst_base_parse_set_upstream_tags (parse, NULL);
1456 parse->priv->tags_changed = TRUE;
1463 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1464 * For EOS this is required because no buffer or serialized event
1465 * will come after EOS and nothing could trigger another
1466 * _finish_frame() call. *
1467 * If the subclass handles sending of EOS manually it can return
1468 * _DROPPED from ::finish() and all other subclasses should have
1469 * decoded/flushed all remaining data before this
1471 * For FLUSH_STOP this is required because it is expected
1472 * to be forwarded immediately and no buffers are queued anyway.
1475 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1476 ret = gst_pad_push_event (parse->srcpad, event);
1478 parse->priv->pending_events =
1479 g_list_prepend (parse->priv->pending_events, event);
1484 GST_DEBUG_OBJECT (parse, "event handled");
1490 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1495 pad = GST_BASE_PARSE_SINK_PAD (parse);
1497 switch (GST_QUERY_TYPE (query)) {
1498 case GST_QUERY_CAPS:
1500 GstBaseParseClass *bclass;
1502 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1504 if (bclass->get_sink_caps) {
1505 GstCaps *caps, *filter;
1507 gst_query_parse_caps (query, &filter);
1508 caps = bclass->get_sink_caps (parse, filter);
1509 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1511 gst_query_set_caps_result (query, caps);
1512 gst_caps_unref (caps);
1516 GstCaps *caps, *template_caps, *filter;
1518 gst_query_parse_caps (query, &filter);
1519 template_caps = gst_pad_get_pad_template_caps (pad);
1520 if (filter != NULL) {
1522 gst_caps_intersect_full (filter, template_caps,
1523 GST_CAPS_INTERSECT_FIRST);
1524 gst_caps_unref (template_caps);
1526 caps = template_caps;
1528 gst_query_set_caps_result (query, caps);
1529 gst_caps_unref (caps);
1537 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1546 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1548 GstBaseParseClass *bclass;
1549 GstBaseParse *parse;
1552 parse = GST_BASE_PARSE (parent);
1553 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1555 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1557 if (bclass->sink_query)
1558 ret = bclass->sink_query (parse, query);
1562 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1563 GST_QUERY_TYPE_NAME (query), ret, query);
1569 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1571 GstBaseParseClass *bclass;
1572 GstBaseParse *parse;
1575 parse = GST_BASE_PARSE (parent);
1576 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1578 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1579 GST_QUERY_TYPE_NAME (query), query);
1581 if (bclass->src_query)
1582 ret = bclass->src_query (parse, query);
1586 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1587 GST_QUERY_TYPE_NAME (query), ret, query);
1592 /* gst_base_parse_src_event:
1593 * @pad: #GstPad that received the event.
1594 * @event: #GstEvent that was received.
1596 * Handler for source pad events.
1598 * Returns: %TRUE if the event was handled.
1601 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1603 GstBaseParse *parse;
1604 GstBaseParseClass *bclass;
1605 gboolean ret = TRUE;
1607 parse = GST_BASE_PARSE (parent);
1608 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1610 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1611 GST_EVENT_TYPE_NAME (event));
1613 if (bclass->src_event)
1614 ret = bclass->src_event (parse, event);
1616 gst_event_unref (event);
1622 gst_base_parse_is_seekable (GstBaseParse * parse)
1624 /* FIXME: could do more here, e.g. check index or just send data from 0
1625 * in pull mode and let decoder/sink clip */
1626 return parse->priv->syncable;
1629 /* gst_base_parse_src_event_default:
1630 * @parse: #GstBaseParse.
1631 * @event: #GstEvent that was received.
1633 * Default srcpad event handler.
1635 * Returns: %TRUE if the event was handled and can be dropped.
1638 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1640 gboolean res = FALSE;
1642 switch (GST_EVENT_TYPE (event)) {
1643 case GST_EVENT_SEEK:
1644 if (gst_base_parse_is_seekable (parse))
1645 res = gst_base_parse_handle_seek (parse, event);
1648 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1657 * gst_base_parse_convert_default:
1658 * @parse: #GstBaseParse.
1659 * @src_format: #GstFormat describing the source format.
1660 * @src_value: Source value to be converted.
1661 * @dest_format: #GstFormat defining the converted format.
1662 * @dest_value: Pointer where the conversion result will be put.
1664 * Default implementation of "convert" vmethod in #GstBaseParse class.
1666 * Returns: %TRUE if conversion was successful.
1669 gst_base_parse_convert_default (GstBaseParse * parse,
1670 GstFormat src_format,
1671 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1673 gboolean ret = FALSE;
1674 guint64 bytes, duration;
1676 if (G_UNLIKELY (src_format == dest_format)) {
1677 *dest_value = src_value;
1681 if (G_UNLIKELY (src_value == -1)) {
1686 if (G_UNLIKELY (src_value == 0)) {
1691 /* need at least some frames */
1692 if (!parse->priv->framecount)
1695 duration = parse->priv->acc_duration / GST_MSECOND;
1696 bytes = parse->priv->bytecount;
1698 if (G_UNLIKELY (!duration || !bytes))
1699 goto no_duration_bytes;
1701 if (src_format == GST_FORMAT_BYTES) {
1702 if (dest_format == GST_FORMAT_TIME) {
1703 /* BYTES -> TIME conversion */
1704 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1705 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1706 *dest_value *= GST_MSECOND;
1707 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1708 *dest_value / GST_MSECOND);
1711 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1713 } else if (src_format == GST_FORMAT_TIME) {
1714 if (dest_format == GST_FORMAT_BYTES) {
1715 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1716 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1718 GST_DEBUG_OBJECT (parse,
1719 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1720 src_value / GST_MSECOND, *dest_value);
1723 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1725 } else if (src_format == GST_FORMAT_DEFAULT) {
1726 /* DEFAULT == frame-based */
1727 if (dest_format == GST_FORMAT_TIME) {
1728 GST_DEBUG_OBJECT (parse, "converting default -> time");
1729 if (parse->priv->fps_den) {
1730 *dest_value = gst_util_uint64_scale (src_value,
1731 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1735 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1738 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1745 GST_DEBUG_OBJECT (parse, "no framecount");
1750 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1751 G_GUINT64_FORMAT, duration, bytes);
1758 gst_base_parse_update_duration (GstBaseParse * parse)
1760 gint64 ptot, dest_value;
1762 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1765 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1766 GST_FORMAT_TIME, &dest_value))
1769 /* inform if duration changed, but try to avoid spamming */
1770 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1772 parse->priv->estimated_duration = dest_value;
1773 GST_LOG_OBJECT (parse,
1774 "updated estimated duration to %" GST_TIME_FORMAT,
1775 GST_TIME_ARGS (dest_value));
1777 if (parse->priv->estimated_drift > GST_SECOND ||
1778 parse->priv->estimated_drift < -GST_SECOND) {
1779 gst_element_post_message (GST_ELEMENT (parse),
1780 gst_message_new_duration_changed (GST_OBJECT (parse)));
1781 parse->priv->estimated_drift = 0;
1785 /* gst_base_parse_update_bitrates:
1786 * @parse: #GstBaseParse.
1787 * @buffer: Current frame as a #GstBuffer
1789 * Keeps track of the minimum and maximum bitrates, and also maintains a
1790 * running average bitrate of the stream so far.
1793 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1795 guint64 data_len, frame_dur;
1796 gint overhead, frame_bitrate;
1797 GstBuffer *buffer = frame->buffer;
1799 overhead = frame->overhead;
1803 data_len = gst_buffer_get_size (buffer) - overhead;
1804 parse->priv->data_bytecount += data_len;
1806 /* duration should be valid by now,
1807 * either set by subclass or maybe based on fps settings */
1808 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1809 /* Calculate duration of a frame from buffer properties */
1810 frame_dur = GST_BUFFER_DURATION (buffer);
1811 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1812 parse->priv->acc_duration;
1815 /* No way to figure out frame duration (is this even possible?) */
1819 /* override if subclass provided bitrate, e.g. metadata based */
1820 if (parse->priv->bitrate) {
1821 parse->priv->avg_bitrate = parse->priv->bitrate;
1822 /* spread this (confirmed) info ASAP */
1823 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1824 parse->priv->tags_changed = TRUE;
1828 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1832 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1833 parse->priv->avg_bitrate);
1835 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1838 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1839 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1840 || parse->priv->post_max_bitrate))
1841 parse->priv->tags_changed = TRUE;
1843 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1844 if (frame_bitrate < parse->priv->min_bitrate) {
1845 parse->priv->min_bitrate = frame_bitrate;
1846 if (parse->priv->post_min_bitrate)
1847 parse->priv->tags_changed = TRUE;
1850 if (frame_bitrate > parse->priv->max_bitrate) {
1851 parse->priv->max_bitrate = frame_bitrate;
1852 if (parse->priv->post_max_bitrate)
1853 parse->priv->tags_changed = TRUE;
1856 /* Only update the tag on a 2% change */
1857 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1858 guint64 diffprev = gst_util_uint64_scale_int (100,
1859 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1860 parse->priv->avg_bitrate);
1861 if (diffprev >= UPDATE_THRESHOLD)
1862 parse->priv->tags_changed = TRUE;
1868 * gst_base_parse_add_index_entry:
1869 * @parse: #GstBaseParse.
1870 * @offset: offset of entry
1871 * @ts: timestamp associated with offset
1872 * @key: whether entry refers to keyframe
1873 * @force: add entry disregarding sanity checks
1875 * Adds an entry to the index associating @offset to @ts. It is recommended
1876 * to only add keyframe entries. @force allows to bypass checks, such as
1877 * whether the stream is (upstream) seekable, another entry is already "close"
1878 * to the new entry, etc.
1880 * Returns: #gboolean indicating whether entry was added
1883 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1884 GstClockTime ts, gboolean key, gboolean force)
1886 gboolean ret = FALSE;
1887 GstIndexAssociation associations[2];
1889 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1890 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1892 if (G_LIKELY (!force)) {
1894 if (!parse->priv->upstream_seekable) {
1895 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1899 /* FIXME need better helper data structure that handles these issues
1900 * related to ongoing collecting of index entries */
1901 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1903 GST_LOG_OBJECT (parse,
1904 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1905 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1909 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1910 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1911 parse->priv->idx_interval) {
1912 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1913 GST_TIME_ARGS (parse->priv->index_last_ts));
1917 /* if last is not really the last one */
1918 if (!parse->priv->index_last_valid) {
1919 GstClockTime prev_ts;
1921 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1922 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1923 GST_LOG_OBJECT (parse,
1924 "entry too close to existing entry %" GST_TIME_FORMAT,
1925 GST_TIME_ARGS (prev_ts));
1926 parse->priv->index_last_offset = offset;
1927 parse->priv->index_last_ts = ts;
1933 associations[0].format = GST_FORMAT_TIME;
1934 associations[0].value = ts;
1935 associations[1].format = GST_FORMAT_BYTES;
1936 associations[1].value = offset;
1938 /* index might change on-the-fly, although that would be nutty app ... */
1939 GST_BASE_PARSE_INDEX_LOCK (parse);
1940 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1941 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1942 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1943 (const GstIndexAssociation *) &associations);
1944 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1947 parse->priv->index_last_offset = offset;
1948 parse->priv->index_last_ts = ts;
1957 /* check for seekable upstream, above and beyond a mere query */
1959 gst_base_parse_check_seekability (GstBaseParse * parse)
1962 gboolean seekable = FALSE;
1963 gint64 start = -1, stop = -1;
1964 guint idx_interval = 0;
1965 guint64 idx_byte_interval = 0;
1967 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1968 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1969 GST_DEBUG_OBJECT (parse, "seeking query failed");
1973 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1975 /* try harder to query upstream size if we didn't get it the first time */
1976 if (seekable && stop == -1) {
1977 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1978 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1981 /* if upstream doesn't know the size, it's likely that it's not seekable in
1982 * practice even if it technically may be seekable */
1983 if (seekable && (start != 0 || stop <= start)) {
1984 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1988 /* let's not put every single frame into our index */
1990 if (stop < 10 * 1024 * 1024)
1992 else if (stop < 100 * 1024 * 1024)
1995 idx_interval = 1000;
1997 /* ensure that even for large files (e.g. very long audio files), the index
1998 * stays reasonably-size, with some arbitrary limit to the total number of
2000 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
2001 GST_DEBUG_OBJECT (parse,
2002 "Limiting index entries to %d, indexing byte interval %"
2003 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
2007 gst_query_unref (query);
2009 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
2010 G_GUINT64_FORMAT ")", seekable, start, stop);
2011 parse->priv->upstream_seekable = seekable;
2012 parse->priv->upstream_size = seekable ? stop : 0;
2014 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
2015 parse->priv->idx_interval = idx_interval * GST_MSECOND;
2016 parse->priv->idx_byte_interval = idx_byte_interval;
2019 /* some misc checks on upstream */
2021 gst_base_parse_check_upstream (GstBaseParse * parse)
2025 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
2026 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
2027 /* upstream has one, accept it also, and no further updates */
2028 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
2029 parse->priv->upstream_has_duration = TRUE;
2032 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
2033 parse->priv->upstream_has_duration);
2036 /* checks src caps to determine if dealing with audio or video */
2037 /* TODO maybe forego automagic stuff and let subclass configure it ? */
2039 gst_base_parse_check_media (GstBaseParse * parse)
2044 caps = gst_pad_get_current_caps (parse->srcpad);
2045 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
2046 parse->priv->is_video =
2047 g_str_has_prefix (gst_structure_get_name (s), "video");
2049 /* historical default */
2050 parse->priv->is_video = FALSE;
2053 gst_caps_unref (caps);
2055 parse->priv->checked_media = TRUE;
2056 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
2059 /* takes ownership of frame */
2061 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2063 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2064 /* frame allocated on the heap, we can just take ownership */
2065 g_queue_push_tail (&parse->priv->queued_frames, frame);
2066 GST_TRACE ("queued frame %p", frame);
2068 GstBaseParseFrame *copy;
2070 /* probably allocated on the stack, must make a proper copy */
2071 copy = gst_base_parse_frame_copy (frame);
2072 g_queue_push_tail (&parse->priv->queued_frames, copy);
2073 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2074 gst_base_parse_frame_free (frame);
2078 /* makes sure that @buf is properly prepared and decorated for passing
2079 * to baseclass, and an equally setup frame is returned setup with @buf.
2080 * Takes ownership of @buf. */
2081 static GstBaseParseFrame *
2082 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2084 GstBaseParseFrame *frame = NULL;
2086 buffer = gst_buffer_make_writable (buffer);
2088 GST_LOG_OBJECT (parse,
2089 "preparing frame at offset %" G_GUINT64_FORMAT
2090 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2091 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2092 gst_buffer_get_size (buffer));
2094 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2096 gst_base_parse_update_flags (parse);
2098 frame = gst_base_parse_frame_new (buffer, 0, 0);
2099 gst_buffer_unref (buffer);
2100 gst_base_parse_update_frame (parse, frame);
2102 /* clear flags for next frame */
2103 parse->priv->discont = FALSE;
2104 parse->priv->new_frame = FALSE;
2106 /* use default handler to provide initial (upstream) metadata */
2107 gst_base_parse_parse_frame (parse, frame);
2112 /* Wraps buffer in a frame and dispatches to subclass.
2113 * Also manages data skipping and offset handling (including adapter flushing).
2114 * Takes ownership of @buffer */
2115 static GstFlowReturn
2116 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2117 gint * skip, gint * flushed)
2119 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2120 GstBaseParseFrame *frame;
2123 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2125 GST_LOG_OBJECT (parse,
2126 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2127 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2128 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2129 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2130 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2132 /* track what is being flushed during this single round of frame processing */
2133 parse->priv->flushed = 0;
2136 /* make it easy for _finish_frame to pick up input data */
2137 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2138 gst_buffer_ref (buffer);
2139 gst_adapter_push (parse->priv->adapter, buffer);
2142 frame = gst_base_parse_prepare_frame (parse, buffer);
2143 ret = klass->handle_frame (parse, frame, skip);
2145 *flushed = parse->priv->flushed;
2147 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2150 /* subclass can only do one of these, or semantics are too unclear */
2151 g_assert (*skip == 0 || *flushed == 0);
2153 /* track skipping */
2155 GstClockTime pts, dts;
2158 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2159 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2160 /* reverse playback, and no frames found yet, so we are skipping
2161 * the leading part of a fragment, which may form the tail of
2162 * fragment coming later, hopefully subclass skips efficiently ... */
2163 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2164 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2165 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2166 outbuf = gst_buffer_make_writable (outbuf);
2167 GST_BUFFER_PTS (outbuf) = pts;
2168 GST_BUFFER_DTS (outbuf) = dts;
2169 parse->priv->buffers_head =
2170 g_slist_prepend (parse->priv->buffers_head, outbuf);
2173 /* If we're asked to skip more than is available in the adapter,
2174 we need to remember what we need to skip for next iteration */
2175 gsize av = gst_adapter_available (parse->priv->adapter);
2176 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2178 gst_adapter_flush (parse->priv->adapter, *skip);
2181 ("This is more than available, flushing %" G_GSIZE_FORMAT
2182 ", storing %u to skip", av, (guint) (*skip - av));
2183 parse->priv->skip = *skip - av;
2184 gst_adapter_flush (parse->priv->adapter, av);
2188 if (!parse->priv->discont)
2189 parse->priv->sync_offset = parse->priv->offset;
2190 parse->priv->offset += *skip;
2191 parse->priv->discont = TRUE;
2192 /* check for indefinite skipping */
2193 if (ret == GST_FLOW_OK)
2194 ret = gst_base_parse_check_sync (parse);
2197 parse->priv->offset += *flushed;
2199 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2200 gst_adapter_clear (parse->priv->adapter);
2203 gst_base_parse_frame_free (frame);
2208 /* gst_base_parse_push_pending_events:
2209 * @parse: #GstBaseParse
2211 * Pushes the pending events
2214 gst_base_parse_push_pending_events (GstBaseParse * parse)
2216 if (G_UNLIKELY (parse->priv->pending_events)) {
2217 GList *r = g_list_reverse (parse->priv->pending_events);
2220 parse->priv->pending_events = NULL;
2221 for (l = r; l != NULL; l = l->next) {
2222 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2228 /* gst_base_parse_handle_and_push_frame:
2229 * @parse: #GstBaseParse.
2230 * @klass: #GstBaseParseClass.
2231 * @frame: (transfer full): a #GstBaseParseFrame
2233 * Parses the frame from given buffer and pushes it forward. Also performs
2234 * timestamp handling and checks the segment limits.
2236 * This is called with srcpad STREAM_LOCK held.
2238 * Returns: #GstFlowReturn
2240 static GstFlowReturn
2241 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2242 GstBaseParseFrame * frame)
2247 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2249 buffer = frame->buffer;
2250 offset = frame->offset;
2252 /* check if subclass/format can provide ts.
2253 * If so, that allows and enables extra seek and duration determining options */
2254 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2255 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2256 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2257 parse->priv->first_frame_offset = offset;
2258 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2259 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2260 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2261 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2262 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2263 GST_TIME_ARGS (parse->priv->first_frame_pts),
2264 parse->priv->first_frame_offset);
2265 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2267 GstClockTime last_ts = G_MAXINT64;
2269 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2270 gst_base_parse_locate_time (parse, &last_ts, &off);
2271 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2272 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2275 /* disable further checks */
2276 parse->priv->first_frame_offset = 0;
2280 /* track upstream time if provided, not subclass' internal notion of it */
2281 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2282 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2283 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2286 /* interpolating and no valid pts yet,
2287 * start with dts and carry on from there */
2288 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2289 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2290 parse->priv->next_pts = parse->priv->next_dts;
2292 /* again use default handler to add missing metadata;
2293 * we may have new information on frame properties */
2294 gst_base_parse_parse_frame (parse, frame);
2296 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2297 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2298 parse->priv->next_dts =
2299 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2300 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2301 GstClockTime next_pts =
2302 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2303 if (next_pts >= parse->priv->next_dts)
2304 parse->priv->next_pts = next_pts;
2307 /* we lost track, do not produce bogus time next time around
2308 * (probably means parser subclass has given up on parsing as well) */
2309 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2310 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2313 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2314 GST_BUFFER_PTS_IS_VALID (buffer))
2315 gst_base_parse_add_index_entry (parse, offset,
2316 GST_BUFFER_PTS (buffer),
2317 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2319 /* All OK, push queued frames if there are any */
2320 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2321 GstBaseParseFrame *queued_frame;
2323 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2324 gst_base_parse_push_frame (parse, queued_frame);
2325 gst_base_parse_frame_free (queued_frame);
2329 return gst_base_parse_push_frame (parse, frame);
2333 * gst_base_parse_push_frame:
2334 * @parse: #GstBaseParse.
2335 * @frame: (transfer none): a #GstBaseParseFrame
2337 * Pushes the frame's buffer downstream, sends any pending events and
2338 * does some timestamp and segment handling. Takes ownership of
2339 * frame's buffer, though caller retains ownership of @frame.
2341 * This must be called with sinkpad STREAM_LOCK held.
2343 * Returns: #GstFlowReturn
2346 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2348 GstFlowReturn ret = GST_FLOW_OK;
2349 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2350 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2351 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2355 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2356 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2358 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2360 buffer = frame->buffer;
2362 GST_LOG_OBJECT (parse,
2363 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2364 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2365 gst_buffer_get_size (buffer),
2366 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2367 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2368 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2371 parse->priv->bytecount += frame->size;
2372 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2373 parse->priv->framecount++;
2374 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2375 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2378 /* 0 means disabled */
2379 if (parse->priv->update_interval < 0)
2380 parse->priv->update_interval = 50;
2381 else if (parse->priv->update_interval > 0 &&
2382 (parse->priv->framecount % parse->priv->update_interval) == 0)
2383 gst_base_parse_update_duration (parse);
2385 if (GST_BUFFER_PTS_IS_VALID (buffer))
2386 last_start = last_stop = GST_BUFFER_PTS (buffer);
2387 if (last_start != GST_CLOCK_TIME_NONE
2388 && GST_BUFFER_DURATION_IS_VALID (buffer))
2389 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2391 /* should have caps by now */
2392 if (!gst_pad_has_current_caps (parse->srcpad))
2395 if (G_UNLIKELY (!parse->priv->checked_media)) {
2396 /* have caps; check identity */
2397 gst_base_parse_check_media (parse);
2400 if (parse->priv->tags_changed) {
2401 gst_base_parse_queue_tag_event_update (parse);
2402 parse->priv->tags_changed = FALSE;
2405 /* Push pending events, including SEGMENT events */
2406 gst_base_parse_push_pending_events (parse);
2408 /* segment adjustment magic; only if we are running the whole show */
2409 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2410 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2411 parse->priv->upstream_seekable)) {
2413 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2414 GST_CLOCK_TIME_IS_VALID (last_start)) {
2415 GstClockTimeDiff diff;
2417 /* only send newsegments with increasing start times,
2418 * otherwise if these go back and forth downstream (sinks) increase
2419 * accumulated time and running_time */
2420 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2421 if (G_UNLIKELY (diff > 2 * GST_SECOND
2422 && last_start > parse->segment.start
2423 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2424 || last_start < parse->segment.stop))) {
2426 GST_DEBUG_OBJECT (parse,
2427 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2428 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2429 "Sending updated SEGMENT events", diff,
2430 GST_TIME_ARGS (parse->segment.position),
2431 GST_TIME_ARGS (last_start));
2433 /* skip gap FIXME */
2434 gst_pad_push_event (parse->srcpad,
2435 gst_event_new_segment (&parse->segment));
2437 parse->segment.position = last_start;
2442 /* update bitrates and optionally post corresponding tags
2443 * (following newsegment) */
2444 gst_base_parse_update_bitrates (parse, frame);
2446 if (klass->pre_push_frame) {
2447 ret = klass->pre_push_frame (parse, frame);
2449 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2452 /* take final ownership of frame buffer */
2453 if (frame->out_buffer) {
2454 buffer = frame->out_buffer;
2455 frame->out_buffer = NULL;
2456 gst_buffer_replace (&frame->buffer, NULL);
2458 buffer = frame->buffer;
2459 frame->buffer = NULL;
2462 /* subclass must play nice */
2463 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2465 size = gst_buffer_get_size (buffer);
2467 parse->priv->seen_keyframe |= parse->priv->is_video &&
2468 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2470 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2471 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2472 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2473 GST_BUFFER_TIMESTAMP (buffer) >
2474 parse->segment.stop + parse->priv->lead_out_ts) {
2475 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2477 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2478 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2479 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2480 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2481 parse->priv->lead_in_ts < parse->segment.start) {
2482 if (parse->priv->seen_keyframe) {
2483 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2486 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2487 ret = GST_BASE_PARSE_FLOW_DROPPED;
2494 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2495 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2496 gst_buffer_unref (buffer);
2498 } else if (ret == GST_FLOW_OK) {
2499 if (parse->segment.rate > 0.0) {
2500 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2502 ret = gst_pad_push (parse->srcpad, buffer);
2503 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2504 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2506 /* in backwards playback mode, if on passthrough we need to push buffers
2507 * directly without accumulating them into the buffers_queued as baseparse
2508 * will never check for a DISCONT while on passthrough and those buffers
2509 * will never be pushed.
2511 * also, as we are on reverse playback, it might be possible that
2512 * passthrough might have just been enabled, so make sure to drain the
2513 * buffers_queued list */
2514 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2515 gst_base_parse_finish_fragment (parse, TRUE);
2516 ret = gst_base_parse_send_buffers (parse);
2519 if (ret == GST_FLOW_OK) {
2520 GST_LOG_OBJECT (parse,
2521 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2522 ret = gst_pad_push (parse->srcpad, buffer);
2523 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2524 gst_flow_get_name (ret));
2526 GST_LOG_OBJECT (parse,
2527 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2528 gst_flow_get_name (ret));
2529 gst_buffer_unref (buffer);
2533 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2535 parse->priv->buffers_queued =
2536 g_slist_prepend (parse->priv->buffers_queued, buffer);
2540 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2541 size, gst_flow_get_name (ret));
2542 gst_buffer_unref (buffer);
2543 /* if we are not sufficiently in control, let upstream decide on EOS */
2544 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2545 (parse->priv->passthrough ||
2546 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2547 !parse->priv->upstream_seekable)))
2551 /* Update current running segment position */
2552 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2553 && last_stop != GST_CLOCK_TIME_NONE
2554 && parse->segment.position < last_stop)
2555 parse->segment.position = last_stop;
2562 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2563 return GST_FLOW_FLUSHING;
2565 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2566 return GST_FLOW_ERROR;
2571 * gst_base_parse_finish_frame:
2572 * @parse: a #GstBaseParse
2573 * @frame: a #GstBaseParseFrame
2574 * @size: consumed input data represented by frame
2576 * Collects parsed data and pushes this downstream.
2577 * Source pad caps must be set when this is called.
2579 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2580 * Otherwise, @size samples will be taken from the input and used for output,
2581 * and the output's metadata (timestamps etc) will be taken as (optionally)
2582 * set by the subclass on @frame's (input) buffer (which is otherwise
2583 * ignored for any but the above purpose/information).
2585 * Note that the latter buffer is invalidated by this call, whereas the
2586 * caller retains ownership of @frame.
2588 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2591 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2594 GstFlowReturn ret = GST_FLOW_OK;
2596 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2597 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2598 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2599 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2602 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2603 "flushing size %d", frame->offset, size);
2605 /* some one-time start-up */
2606 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2607 gst_base_parse_check_seekability (parse);
2608 gst_base_parse_check_upstream (parse);
2611 parse->priv->flushed += size;
2613 if (parse->priv->scanning && frame->buffer) {
2614 if (!parse->priv->scanned_frame) {
2615 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2620 /* either PUSH or PULL mode arranges for adapter data */
2621 /* ensure output buffer */
2622 if (!frame->out_buffer) {
2623 GstBuffer *src, *dest;
2625 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2626 dest = frame->out_buffer;
2627 src = frame->buffer;
2628 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2629 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2630 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2631 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2632 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2633 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2635 gst_adapter_flush (parse->priv->adapter, size);
2638 /* use as input for subsequent processing */
2639 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2640 gst_buffer_unref (frame->out_buffer);
2641 frame->out_buffer = NULL;
2643 /* mark input size consumed */
2646 /* subclass might queue frames/data internally if it needs more
2647 * frames to decide on the format, or might request us to queue here. */
2648 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2649 gst_buffer_replace (&frame->buffer, NULL);
2651 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2652 GstBaseParseFrame *copy;
2654 copy = gst_base_parse_frame_copy (frame);
2655 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2656 gst_base_parse_queue_frame (parse, copy);
2660 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2666 /* gst_base_parse_drain:
2668 * Drains the adapter until it is empty. It decreases the min_frame_size to
2669 * match the current adapter size and calls chain method until the adapter
2670 * is emptied or chain returns with error.
2673 gst_base_parse_drain (GstBaseParse * parse)
2677 GST_DEBUG_OBJECT (parse, "draining");
2678 parse->priv->drain = TRUE;
2681 avail = gst_adapter_available (parse->priv->adapter);
2685 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2686 NULL) != GST_FLOW_OK) {
2690 /* nothing changed, maybe due to truncated frame; break infinite loop */
2691 if (avail == gst_adapter_available (parse->priv->adapter)) {
2692 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2693 gst_adapter_clear (parse->priv->adapter);
2697 parse->priv->drain = FALSE;
2700 /* gst_base_parse_send_buffers
2702 * Sends buffers collected in send_buffers downstream, and ensures that list
2703 * is empty at the end (errors or not).
2705 static GstFlowReturn
2706 gst_base_parse_send_buffers (GstBaseParse * parse)
2708 GSList *send = NULL;
2710 GstFlowReturn ret = GST_FLOW_OK;
2711 gboolean first = TRUE;
2713 send = parse->priv->buffers_send;
2717 buf = GST_BUFFER_CAST (send->data);
2718 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2719 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2720 ", offset %" G_GINT64_FORMAT, buf,
2721 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2722 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2723 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2725 /* Make sure the first buffer is always DISCONT. If we split
2726 * GOPs inside the parser this is otherwise not guaranteed */
2728 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2732 /* iterate output queue an push downstream */
2733 ret = gst_pad_push (parse->srcpad, buf);
2734 send = g_slist_delete_link (send, send);
2736 /* clear any leftover if error */
2737 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2739 buf = GST_BUFFER_CAST (send->data);
2740 gst_buffer_unref (buf);
2741 send = g_slist_delete_link (send, send);
2746 parse->priv->buffers_send = send;
2751 /* gst_base_parse_start_fragment:
2753 * Prepares for processing a reverse playback (forward) fragment
2754 * by (re)setting proper state variables.
2756 static GstFlowReturn
2757 gst_base_parse_start_fragment (GstBaseParse * parse)
2759 GST_LOG_OBJECT (parse, "starting fragment");
2761 /* invalidate so no fall-back timestamping is performed;
2762 * ok if taken from subclass or upstream */
2763 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2764 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2765 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2766 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2767 /* prevent it hanging around stop all the time */
2768 parse->segment.position = GST_CLOCK_TIME_NONE;
2770 parse->priv->discont = TRUE;
2772 /* head of previous fragment is now pending tail of current fragment */
2773 parse->priv->buffers_pending = parse->priv->buffers_head;
2774 parse->priv->buffers_head = NULL;
2780 /* gst_base_parse_finish_fragment:
2782 * Processes a reverse playback (forward) fragment:
2783 * - append head of last fragment that was skipped to current fragment data
2784 * - drain the resulting current fragment data (i.e. repeated chain)
2785 * - add time/duration (if needed) to frames queued by chain
2786 * - push queued data
2788 static GstFlowReturn
2789 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2792 GstFlowReturn ret = GST_FLOW_OK;
2793 gboolean seen_key = FALSE, seen_delta = FALSE;
2795 GST_LOG_OBJECT (parse, "finishing fragment");
2798 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2799 while (parse->priv->buffers_pending) {
2800 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2802 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2803 gst_buffer_get_size (buf));
2804 gst_adapter_push (parse->priv->adapter, buf);
2806 GST_LOG_OBJECT (parse, "discarding head buffer");
2807 gst_buffer_unref (buf);
2809 parse->priv->buffers_pending =
2810 g_slist_delete_link (parse->priv->buffers_pending,
2811 parse->priv->buffers_pending);
2814 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2815 /* initial skipped data is added to buffers_pending */
2816 gst_base_parse_drain (parse);
2818 if (parse->priv->buffers_send) {
2819 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2820 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2823 /* add metadata (if needed to queued buffers */
2824 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2825 GST_TIME_ARGS (parse->priv->last_pts));
2826 while (parse->priv->buffers_queued) {
2827 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2829 /* no touching if upstream or parsing provided time */
2830 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2831 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2832 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2833 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2834 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2835 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2836 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2838 parse->priv->last_pts = 0;
2839 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2840 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2841 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2843 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2844 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2845 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2847 parse->priv->last_dts = 0;
2848 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2849 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2850 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2853 /* no idea, very bad */
2854 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2857 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2858 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2860 /* reverse order for ascending sending */
2861 /* send downstream at keyframe not preceded by a keyframe
2862 * (e.g. that should identify start of collection of IDR nals) */
2863 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2865 ret = gst_base_parse_send_buffers (parse);
2866 /* if a problem, throw all to sending */
2867 if (ret != GST_FLOW_OK) {
2868 parse->priv->buffers_send =
2869 g_slist_reverse (parse->priv->buffers_queued);
2870 parse->priv->buffers_queued = NULL;
2880 parse->priv->buffers_send =
2881 g_slist_prepend (parse->priv->buffers_send, buf);
2882 parse->priv->buffers_queued =
2883 g_slist_delete_link (parse->priv->buffers_queued,
2884 parse->priv->buffers_queued);
2887 /* audio may have all marked as keyframe, so arrange to send here. Also
2888 * we might have ended the loop above on a keyframe, in which case we
2890 if (!seen_delta || seen_key)
2891 ret = gst_base_parse_send_buffers (parse);
2893 /* any trailing unused no longer usable (ideally none) */
2894 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2895 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2896 gst_adapter_available (parse->priv->adapter));
2897 gst_adapter_clear (parse->priv->adapter);
2903 /* small helper that checks whether we have been trying to resync too long */
2904 static inline GstFlowReturn
2905 gst_base_parse_check_sync (GstBaseParse * parse)
2907 if (G_UNLIKELY (parse->priv->discont &&
2908 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2909 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2910 ("Failed to parse stream"), (NULL));
2911 return GST_FLOW_ERROR;
2917 static GstFlowReturn
2918 gst_base_parse_process_streamheader (GstBaseParse * parse)
2922 const GValue *value;
2923 GstFlowReturn ret = GST_FLOW_OK;
2925 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2929 str = gst_caps_get_structure (caps, 0);
2930 value = gst_structure_get_value (str, "streamheader");
2934 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2936 if (GST_VALUE_HOLDS_ARRAY (value)) {
2938 gsize len = gst_value_array_get_size (value);
2940 for (i = 0; i < len; i++) {
2942 gst_value_get_buffer (gst_value_array_get_value (value, i));
2944 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2945 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2948 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2949 GstBuffer *buffer = gst_value_get_buffer (value);
2951 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2952 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2955 gst_caps_unref (caps);
2962 gst_caps_unref (caps);
2965 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2970 static GstFlowReturn
2971 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2973 GstBaseParseClass *bclass;
2974 GstBaseParse *parse;
2975 GstFlowReturn ret = GST_FLOW_OK;
2976 GstFlowReturn old_ret = GST_FLOW_OK;
2977 GstBuffer *tmpbuf = NULL;
2981 GstClockTime pts, dts;
2983 parse = GST_BASE_PARSE (parent);
2984 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2985 GST_DEBUG_OBJECT (parent, "chain");
2987 /* early out for speed, if we need to skip */
2988 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
2989 parse->priv->skip = 0;
2990 if (parse->priv->skip > 0) {
2991 gsize bsize = gst_buffer_get_size (buffer);
2992 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2994 if (parse->priv->skip >= bsize) {
2995 parse->priv->skip -= bsize;
2996 GST_DEBUG ("All the buffer is skipped");
2997 parse->priv->offset += bsize;
2998 parse->priv->sync_offset = parse->priv->offset;
3001 buffer = gst_buffer_make_writable (buffer);
3002 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
3003 parse->priv->offset += parse->priv->skip;
3004 GST_DEBUG ("Done skipping, we have %u left on this buffer",
3005 (unsigned) (bsize - parse->priv->skip));
3006 parse->priv->skip = 0;
3007 parse->priv->discont = TRUE;
3010 if (G_UNLIKELY (parse->priv->first_buffer)) {
3011 parse->priv->first_buffer = FALSE;
3012 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
3013 /* this stream has no header buffers, check if we just prepend the
3014 * streamheader from caps to the stream */
3015 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
3016 "prepend to the stream");
3017 gst_base_parse_process_streamheader (parse);
3019 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
3020 "streamheader from caps");
3024 if (parse->priv->detecting) {
3025 GstBuffer *detect_buf;
3027 if (parse->priv->detect_buffers_size == 0) {
3028 detect_buf = gst_buffer_ref (buffer);
3033 detect_buf = gst_buffer_new ();
3035 for (l = parse->priv->detect_buffers; l; l = l->next) {
3036 gsize tmpsize = gst_buffer_get_size (l->data);
3038 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
3039 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3043 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3044 offset, gst_buffer_get_size (buffer));
3047 ret = bclass->detect (parse, detect_buf);
3048 gst_buffer_unref (detect_buf);
3050 if (ret == GST_FLOW_OK) {
3053 /* Detected something */
3054 parse->priv->detecting = FALSE;
3056 for (l = parse->priv->detect_buffers; l; l = l->next) {
3057 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3059 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3060 parent, GST_BUFFER_CAST (l->data));
3062 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3064 g_list_free (parse->priv->detect_buffers);
3065 parse->priv->detect_buffers = NULL;
3066 parse->priv->detect_buffers_size = 0;
3068 if (ret != GST_FLOW_OK) {
3072 /* Handle the current buffer */
3073 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3074 /* Still detecting, append buffer or error out if draining */
3076 if (parse->priv->drain) {
3077 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3078 return GST_FLOW_ERROR;
3079 } else if (parse->priv->flushing) {
3080 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3082 g_list_free (parse->priv->detect_buffers);
3083 parse->priv->detect_buffers = NULL;
3084 parse->priv->detect_buffers_size = 0;
3086 parse->priv->detect_buffers =
3087 g_list_append (parse->priv->detect_buffers, buffer);
3088 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3092 /* Something went wrong, subclass responsible for error reporting */
3096 /* And now handle the current buffer if detection worked */
3099 if (G_LIKELY (buffer)) {
3100 GST_LOG_OBJECT (parse,
3101 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3102 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3103 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3104 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3105 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3107 if (G_UNLIKELY (!parse->priv->disable_passthrough
3108 && parse->priv->passthrough)) {
3109 GstBaseParseFrame frame;
3111 gst_base_parse_frame_init (&frame);
3112 frame.buffer = gst_buffer_make_writable (buffer);
3113 ret = gst_base_parse_push_frame (parse, &frame);
3114 gst_base_parse_frame_free (&frame);
3117 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3118 /* upstream feeding us in reverse playback;
3119 * finish previous fragment and start new upon DISCONT */
3120 if (parse->segment.rate < 0.0) {
3121 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3122 ret = gst_base_parse_finish_fragment (parse, TRUE);
3123 gst_base_parse_start_fragment (parse);
3125 /* discont in the stream, drain and mark discont for next output */
3126 gst_base_parse_drain (parse);
3127 parse->priv->discont = TRUE;
3130 gst_adapter_push (parse->priv->adapter, buffer);
3133 /* Parse and push as many frames as possible */
3134 /* Stop either when adapter is empty or we are flushing */
3135 while (!parse->priv->flushing) {
3138 /* note: if subclass indicates MAX fsize,
3139 * this will not likely be available anyway ... */
3140 min_size = MAX (parse->priv->min_frame_size, fsize);
3141 av = gst_adapter_available (parse->priv->adapter);
3143 if (G_UNLIKELY (parse->priv->drain)) {
3145 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3146 if (G_UNLIKELY (!min_size)) {
3151 /* Collect at least min_frame_size bytes */
3152 if (av < min_size) {
3153 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3157 /* move along with upstream timestamp (if any),
3158 * but interpolate in between */
3159 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3160 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3161 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
3162 parse->priv->prev_pts = parse->priv->next_pts = pts;
3164 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
3165 parse->priv->prev_dts = parse->priv->next_dts = dts;
3167 /* we can mess with, erm interpolate, timestamps,
3168 * and incoming stuff has PTS but no DTS seen so far,
3169 * then pick up DTS from PTS and hope for the best ... */
3170 if (parse->priv->infer_ts &&
3171 parse->priv->pts_interpolate &&
3172 !GST_CLOCK_TIME_IS_VALID (dts) &&
3173 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
3174 GST_CLOCK_TIME_IS_VALID (pts))
3175 parse->priv->next_dts = pts;
3177 /* always pass all available data */
3178 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3180 /* already inform subclass what timestamps we have planned,
3181 * at least if provided by time-based upstream */
3182 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3183 tmpbuf = gst_buffer_make_writable (tmpbuf);
3184 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3185 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3186 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3189 /* keep the adapter mapped, so keep track of what has to be flushed */
3190 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3193 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3196 if (skip == 0 && flush == 0) {
3197 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3198 "breaking to get more data");
3199 /* ignore this return as it produced no data */
3207 GST_LOG_OBJECT (parse, "chain leaving");
3211 /* pull @size bytes at current offset,
3212 * i.e. at least try to and possibly return a shorter buffer if near the end */
3213 static GstFlowReturn
3214 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3215 GstBuffer ** buffer)
3217 GstFlowReturn ret = GST_FLOW_OK;
3219 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3221 /* Caching here actually makes much less difference than one would expect.
3222 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3223 if (parse->priv->cache) {
3224 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3225 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3227 if (cache_offset <= parse->priv->offset &&
3228 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3229 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3230 parse->priv->offset - cache_offset, size);
3231 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3234 /* not enough data in the cache, free cache and get a new one */
3235 gst_buffer_unref (parse->priv->cache);
3236 parse->priv->cache = NULL;
3239 /* refill the cache */
3241 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3242 64 * 1024), &parse->priv->cache);
3243 if (ret != GST_FLOW_OK) {
3244 parse->priv->cache = NULL;
3248 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3250 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3252 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3256 /* Not possible to get enough data, try a last time with
3257 * requesting exactly the size we need */
3258 gst_buffer_unref (parse->priv->cache);
3259 parse->priv->cache = NULL;
3261 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3262 &parse->priv->cache);
3264 if (ret != GST_FLOW_OK) {
3265 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3270 if (gst_buffer_get_size (parse->priv->cache) < size) {
3271 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3272 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3273 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3275 *buffer = parse->priv->cache;
3276 parse->priv->cache = NULL;
3282 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3283 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3288 static GstFlowReturn
3289 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3292 GstClockTime ts = 0;
3296 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3297 ", last_offset = %" G_GINT64_FORMAT,
3298 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3300 if (!parse->priv->last_offset
3301 || parse->priv->last_pts <= parse->segment.start) {
3302 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3303 GST_TIME_ARGS (parse->segment.start));
3308 /* last fragment started at last_offset / last_ts;
3309 * seek back 10s capped at 1MB */
3310 if (parse->priv->last_pts >= 10 * GST_SECOND)
3311 ts = parse->priv->last_pts - 10 * GST_SECOND;
3312 /* if we are exact now, we will be more so going backwards */
3313 if (parse->priv->exact_position) {
3314 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3316 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3317 GST_FORMAT_BYTES, &offset)) {
3318 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3321 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3322 parse->priv->last_offset - 1024);
3323 offset = MAX (0, offset);
3325 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3327 parse->priv->offset = offset;
3329 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3331 if (ret != GST_FLOW_OK)
3334 /* offset will increase again as fragment is processed/parsed */
3335 parse->priv->last_offset = offset;
3337 gst_base_parse_start_fragment (parse);
3338 gst_adapter_push (parse->priv->adapter, buffer);
3339 ret = gst_base_parse_finish_fragment (parse, TRUE);
3340 if (ret != GST_FLOW_OK)
3343 /* force previous fragment */
3344 parse->priv->offset = -1;
3351 * pull and scan for next frame starting from current offset
3352 * ajusts sync, drain and offset going along */
3353 static GstFlowReturn
3354 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3357 GstFlowReturn ret = GST_FLOW_OK;
3358 guint fsize, min_size;
3362 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3363 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3365 /* let's make this efficient for all subclass once and for all;
3366 * maybe it does not need this much, but in the latter case, we know we are
3367 * in pull mode here and might as well try to read and supply more anyway
3368 * (so does the buffer caching mechanism) */
3372 min_size = MAX (parse->priv->min_frame_size, fsize);
3374 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3376 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3377 if (ret != GST_FLOW_OK)
3380 /* if we got a short read, inform subclass we are draining leftover
3381 * and no more is to be expected */
3382 if (gst_buffer_get_size (buffer) < min_size) {
3383 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3384 parse->priv->drain = TRUE;
3387 if (parse->priv->detecting) {
3388 ret = klass->detect (parse, buffer);
3389 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3390 /* If draining we error out, otherwise request a buffer
3392 if (parse->priv->drain) {
3393 gst_buffer_unref (buffer);
3394 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3395 return GST_FLOW_ERROR;
3398 gst_buffer_unref (buffer);
3401 } else if (ret != GST_FLOW_OK) {
3402 gst_buffer_unref (buffer);
3403 GST_ERROR_OBJECT (parse, "detect() returned %s",
3404 gst_flow_get_name (ret));
3408 /* Else handle this buffer normally */
3411 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3412 if (ret != GST_FLOW_OK)
3415 /* If a large amount of data was requested to be skipped, _handle_buffer
3416 might have set the priv->skip flag to an extra amount on top of skip.
3417 In pull mode, we can just pull from the new offset directly. */
3418 parse->priv->offset += parse->priv->skip;
3419 parse->priv->skip = 0;
3421 /* something flushed means something happened,
3422 * and we should bail out of this loop so as not to occupy
3423 * the task thread indefinitely */
3425 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3428 /* nothing flushed, no skip and draining, so nothing left to do */
3429 if (!skip && parse->priv->drain) {
3430 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3431 "breaking loop and marking EOS");
3435 /* otherwise, get some more data
3436 * note that is checked this does not happen indefinitely */
3438 GST_LOG_OBJECT (parse, "getting some more data");
3441 parse->priv->drain = FALSE;
3448 /* Loop that is used in pull mode to retrieve data from upstream */
3450 gst_base_parse_loop (GstPad * pad)
3452 GstBaseParse *parse;
3453 GstBaseParseClass *klass;
3454 GstFlowReturn ret = GST_FLOW_OK;
3456 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3457 klass = GST_BASE_PARSE_GET_CLASS (parse);
3459 GST_LOG_OBJECT (parse, "Entering parse loop");
3461 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3466 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3469 event = gst_event_new_stream_start (stream_id);
3470 gst_event_set_group_id (event, gst_util_group_id_next ());
3472 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3473 gst_pad_push_event (parse->srcpad, event);
3474 parse->priv->push_stream_start = FALSE;
3478 /* reverse playback:
3479 * first fragment (closest to stop time) is handled normally below,
3480 * then we pull in fragments going backwards */
3481 if (parse->segment.rate < 0.0) {
3482 /* check if we jumped back to a previous fragment,
3483 * which is a post-first fragment */
3484 if (parse->priv->offset < 0) {
3485 ret = gst_base_parse_handle_previous_fragment (parse);
3490 ret = gst_base_parse_scan_frame (parse, klass);
3492 /* eat expected eos signalling past segment in reverse playback */
3493 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3494 parse->segment.position >= parse->segment.stop) {
3495 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3496 /* push what was accumulated during loop run */
3497 gst_base_parse_finish_fragment (parse, FALSE);
3498 /* force previous fragment */
3499 parse->priv->offset = -1;
3503 if (ret != GST_FLOW_OK)
3507 if (ret == GST_FLOW_EOS)
3509 else if (ret != GST_FLOW_OK)
3512 gst_object_unref (parse);
3519 GST_DEBUG_OBJECT (parse, "eos");
3524 gboolean push_eos = FALSE;
3526 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3527 gst_flow_get_name (ret));
3528 gst_pad_pause_task (parse->sinkpad);
3530 if (ret == GST_FLOW_EOS) {
3531 /* handle end-of-stream/segment */
3532 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3535 if ((stop = parse->segment.stop) == -1)
3536 stop = parse->segment.duration;
3538 GST_DEBUG_OBJECT (parse, "sending segment_done");
3540 gst_element_post_message
3541 (GST_ELEMENT_CAST (parse),
3542 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3543 GST_FORMAT_TIME, stop));
3544 gst_pad_push_event (parse->srcpad,
3545 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3547 /* If we STILL have zero frames processed, fire an error */
3548 if (parse->priv->framecount == 0) {
3549 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3550 ("No valid frames found before end of stream"), (NULL));
3554 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3555 /* for fatal errors we post an error message, wrong-state is
3556 * not fatal because it happens due to flushes and only means
3557 * that we should stop now. */
3558 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3559 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3563 if (parse->priv->estimated_duration <= 0) {
3564 gst_base_parse_update_duration (parse);
3566 /* Push pending events, including SEGMENT events */
3567 gst_base_parse_push_pending_events (parse);
3569 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3571 gst_object_unref (parse);
3576 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3578 GstSchedulingFlags sched_flags;
3579 GstBaseParse *parse;
3583 parse = GST_BASE_PARSE (parent);
3585 GST_DEBUG_OBJECT (parse, "sink activate");
3587 query = gst_query_new_scheduling ();
3588 if (!gst_pad_peer_query (sinkpad, query)) {
3589 gst_query_unref (query);
3590 goto baseparse_push;
3593 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3595 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3596 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3598 gst_query_unref (query);
3601 goto baseparse_push;
3603 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3604 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3605 goto baseparse_push;
3607 parse->priv->push_stream_start = TRUE;
3609 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3614 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3615 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3620 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3622 GstBaseParseClass *klass;
3623 gboolean result = TRUE;
3625 GST_DEBUG_OBJECT (parse, "activate %d", active);
3627 klass = GST_BASE_PARSE_GET_CLASS (parse);
3630 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3631 result = klass->start (parse);
3633 /* If the subclass implements ::detect we want to
3634 * call it for the first buffers now */
3635 parse->priv->detecting = (klass->detect != NULL);
3637 /* We must make sure streaming has finished before resetting things
3638 * and calling the ::stop vfunc */
3639 GST_PAD_STREAM_LOCK (parse->sinkpad);
3640 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3642 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3643 result = klass->stop (parse);
3645 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3647 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3652 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3653 GstPadMode mode, gboolean active)
3656 GstBaseParse *parse;
3658 parse = GST_BASE_PARSE (parent);
3660 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3661 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3663 if (!gst_base_parse_activate (parse, active))
3664 goto activate_failed;
3667 case GST_PAD_MODE_PULL:
3669 parse->priv->pending_events =
3670 g_list_prepend (parse->priv->pending_events,
3671 gst_event_new_segment (&parse->segment));
3674 result = gst_pad_stop_task (pad);
3682 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3684 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3691 GST_DEBUG_OBJECT (parse, "activate failed");
3697 * gst_base_parse_set_duration:
3698 * @parse: #GstBaseParse.
3700 * @duration: duration value.
3701 * @interval: how often to update the duration estimate based on bitrate, or 0.
3703 * Sets the duration of the currently playing media. Subclass can use this
3704 * when it is able to determine duration and/or notices a change in the media
3705 * duration. Alternatively, if @interval is non-zero (default), then stream
3706 * duration is determined based on estimated bitrate, and updated every @interval
3710 gst_base_parse_set_duration (GstBaseParse * parse,
3711 GstFormat fmt, gint64 duration, gint interval)
3713 g_return_if_fail (parse != NULL);
3715 if (parse->priv->upstream_has_duration) {
3716 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3720 if (duration != parse->priv->duration) {
3723 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3724 gst_element_post_message (GST_ELEMENT (parse), m);
3726 /* TODO: what about duration tag? */
3728 parse->priv->duration = duration;
3729 parse->priv->duration_fmt = fmt;
3730 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3731 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3732 if (interval != 0) {
3733 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3737 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3738 parse->priv->update_interval = interval;
3744 * gst_base_parse_set_average_bitrate:
3745 * @parse: #GstBaseParse.
3746 * @bitrate: average bitrate in bits/second
3748 * Optionally sets the average bitrate detected in media (if non-zero),
3749 * e.g. based on metadata, as it will be posted to the application.
3751 * By default, announced average bitrate is estimated. The average bitrate
3752 * is used to estimate the total duration of the stream and to estimate
3753 * a seek position, if there's no index and the format is syncable
3754 * (see gst_base_parse_set_syncable()).
3757 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3759 parse->priv->bitrate = bitrate;
3760 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3764 * gst_base_parse_set_min_frame_size:
3765 * @parse: #GstBaseParse.
3766 * @min_size: Minimum size of the data that this base class should give to
3769 * Subclass can use this function to tell the base class that it needs to
3770 * give at least #min_size buffers.
3773 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3775 g_return_if_fail (parse != NULL);
3777 parse->priv->min_frame_size = min_size;
3778 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3782 * gst_base_parse_set_frame_rate:
3783 * @parse: the #GstBaseParse to set
3784 * @fps_num: frames per second (numerator).
3785 * @fps_den: frames per second (denominator).
3786 * @lead_in: frames needed before a segment for subsequent decode
3787 * @lead_out: frames needed after a segment
3789 * If frames per second is configured, parser can take care of buffer duration
3790 * and timestamping. When performing segment clipping, or seeking to a specific
3791 * location, a corresponding decoder might need an initial @lead_in and a
3792 * following @lead_out number of frames to ensure the desired segment is
3793 * entirely filled upon decoding.
3796 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3797 guint fps_den, guint lead_in, guint lead_out)
3799 g_return_if_fail (parse != NULL);
3801 parse->priv->fps_num = fps_num;
3802 parse->priv->fps_den = fps_den;
3803 if (!fps_num || !fps_den) {
3804 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3806 fps_num = fps_den = 0;
3807 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3808 parse->priv->lead_in = parse->priv->lead_out = 0;
3809 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3811 parse->priv->frame_duration =
3812 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3813 parse->priv->lead_in = lead_in;
3814 parse->priv->lead_out = lead_out;
3815 parse->priv->lead_in_ts =
3816 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3817 parse->priv->lead_out_ts =
3818 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3819 /* aim for about 1.5s to estimate duration */
3820 if (parse->priv->update_interval < 0) {
3821 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3822 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3823 parse->priv->update_interval);
3826 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3827 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3828 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3829 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3830 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3831 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3835 * gst_base_parse_set_has_timing_info:
3836 * @parse: a #GstBaseParse
3837 * @has_timing: whether frames carry timing information
3839 * Set if frames carry timing information which the subclass can (generally)
3840 * parse and provide. In particular, intrinsic (rather than estimated) time
3841 * can be obtained following a seek.
3844 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3846 parse->priv->has_timing_info = has_timing;
3847 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3851 * gst_base_parse_set_syncable:
3852 * @parse: a #GstBaseParse
3853 * @syncable: set if frame starts can be identified
3855 * Set if frame starts can be identified. This is set by default and
3856 * determines whether seeking based on bitrate averages
3857 * is possible for a format/stream.
3860 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3862 parse->priv->syncable = syncable;
3863 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3867 * gst_base_parse_set_passthrough:
3868 * @parse: a #GstBaseParse
3869 * @passthrough: %TRUE if parser should run in passthrough mode
3871 * Set if the nature of the format or configuration does not allow (much)
3872 * parsing, and the parser should operate in passthrough mode (which only
3873 * applies when operating in push mode). That is, incoming buffers are
3874 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3875 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3876 * so subclass can perform as much or as little is appropriate for
3877 * passthrough semantics in @pre_push_frame.
3880 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3882 parse->priv->passthrough = passthrough;
3883 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3887 * gst_base_parse_set_pts_interpolation:
3888 * @parse: a #GstBaseParse
3889 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3891 * By default, the base class will guess PTS timestamps using a simple
3892 * interpolation (previous timestamp + duration), which is incorrect for
3893 * data streams with reordering, where PTS can go backward. Sub-classes
3894 * implementing such formats should disable PTS interpolation.
3897 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3898 gboolean pts_interpolate)
3900 parse->priv->pts_interpolate = pts_interpolate;
3901 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3902 (pts_interpolate) ? "yes" : "no");
3906 * gst_base_parse_set_infer_ts:
3907 * @parse: a #GstBaseParse
3908 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3910 * By default, the base class might try to infer PTS from DTS and vice
3911 * versa. While this is generally correct for audio data, it may not
3912 * be otherwise. Sub-classes implementing such formats should disable
3913 * timestamp inferring.
3916 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3918 parse->priv->infer_ts = infer_ts;
3919 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3923 * gst_base_parse_set_latency:
3924 * @parse: a #GstBaseParse
3925 * @min_latency: minimum parse latency
3926 * @max_latency: maximum parse latency
3928 * Sets the minimum and maximum (which may likely be equal) latency introduced
3929 * by the parsing process. If there is such a latency, which depends on the
3930 * particular parsing of the format, it typically corresponds to 1 frame duration.
3933 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3934 GstClockTime max_latency)
3936 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3937 g_return_if_fail (min_latency <= max_latency);
3939 GST_OBJECT_LOCK (parse);
3940 parse->priv->min_latency = min_latency;
3941 parse->priv->max_latency = max_latency;
3942 GST_OBJECT_UNLOCK (parse);
3943 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3944 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3945 GST_TIME_ARGS (max_latency));
3949 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3950 GstClockTime * duration)
3952 gboolean res = FALSE;
3954 g_return_val_if_fail (duration != NULL, FALSE);
3956 *duration = GST_CLOCK_TIME_NONE;
3957 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3958 GST_LOG_OBJECT (parse, "using provided duration");
3959 *duration = parse->priv->duration;
3961 } else if (parse->priv->duration != -1) {
3962 GST_LOG_OBJECT (parse, "converting provided duration");
3963 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3964 parse->priv->duration, format, (gint64 *) duration);
3965 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3966 GST_LOG_OBJECT (parse, "using estimated duration");
3967 *duration = parse->priv->estimated_duration;
3970 GST_LOG_OBJECT (parse, "cannot estimate duration");
3973 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3974 GST_TIME_ARGS (*duration));
3979 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3981 gboolean res = FALSE;
3984 pad = GST_BASE_PARSE_SRC_PAD (parse);
3986 switch (GST_QUERY_TYPE (query)) {
3987 case GST_QUERY_POSITION:
3992 GST_DEBUG_OBJECT (parse, "position query");
3993 gst_query_parse_position (query, &format, NULL);
3995 /* try upstream first */
3996 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3998 /* Fall back on interpreting segment */
3999 GST_OBJECT_LOCK (parse);
4000 if (format == GST_FORMAT_BYTES) {
4001 dest_value = parse->priv->offset;
4003 } else if (format == parse->segment.format &&
4004 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
4005 dest_value = gst_segment_to_stream_time (&parse->segment,
4006 parse->segment.format, parse->segment.position);
4009 GST_OBJECT_UNLOCK (parse);
4011 /* no precise result, upstream no idea either, then best estimate */
4012 /* priv->offset is updated in both PUSH/PULL modes */
4013 res = gst_base_parse_convert (parse,
4014 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
4017 gst_query_set_position (query, format, dest_value);
4021 case GST_QUERY_DURATION:
4024 GstClockTime duration;
4026 GST_DEBUG_OBJECT (parse, "duration query");
4027 gst_query_parse_duration (query, &format, NULL);
4029 /* consult upstream */
4030 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4032 /* otherwise best estimate from us */
4034 res = gst_base_parse_get_duration (parse, format, &duration);
4036 gst_query_set_duration (query, format, duration);
4040 case GST_QUERY_SEEKING:
4043 GstClockTime duration = GST_CLOCK_TIME_NONE;
4044 gboolean seekable = FALSE;
4046 GST_DEBUG_OBJECT (parse, "seeking query");
4047 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4049 /* consult upstream */
4050 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4052 /* we may be able to help if in TIME */
4053 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4054 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4055 /* already OK if upstream takes care */
4056 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4058 if (!(res && seekable)) {
4059 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4060 || duration == -1) {
4061 /* seekable if we still have a chance to get duration later on */
4063 parse->priv->upstream_seekable && parse->priv->update_interval;
4065 seekable = parse->priv->upstream_seekable;
4066 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4069 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4075 case GST_QUERY_FORMATS:
4076 gst_query_set_formatsv (query, 3, fmtlist);
4079 case GST_QUERY_CONVERT:
4081 GstFormat src_format, dest_format;
4082 gint64 src_value, dest_value;
4084 gst_query_parse_convert (query, &src_format, &src_value,
4085 &dest_format, &dest_value);
4087 res = gst_base_parse_convert (parse, src_format, src_value,
4088 dest_format, &dest_value);
4090 gst_query_set_convert (query, src_format, src_value,
4091 dest_format, dest_value);
4095 case GST_QUERY_LATENCY:
4097 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4099 GstClockTime min_latency, max_latency;
4101 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4102 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4103 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4104 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4106 GST_OBJECT_LOCK (parse);
4107 /* add our latency */
4108 min_latency += parse->priv->min_latency;
4109 if (max_latency == -1 || parse->priv->max_latency == -1)
4112 max_latency += parse->priv->max_latency;
4113 GST_OBJECT_UNLOCK (parse);
4115 gst_query_set_latency (query, live, min_latency, max_latency);
4119 case GST_QUERY_SEGMENT:
4124 format = parse->segment.format;
4127 gst_segment_to_stream_time (&parse->segment, format,
4128 parse->segment.start);
4129 if ((stop = parse->segment.stop) == -1)
4130 stop = parse->segment.duration;
4132 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4134 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4139 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4145 /* scans for a cluster start from @pos,
4146 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4147 static GstFlowReturn
4148 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4149 GstClockTime * time, GstClockTime * duration)
4151 GstBaseParseClass *klass;
4153 gboolean orig_drain, orig_discont;
4154 GstFlowReturn ret = GST_FLOW_OK;
4155 GstBuffer *buf = NULL;
4156 GstBaseParseFrame *sframe = NULL;
4158 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4159 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4160 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4162 klass = GST_BASE_PARSE_GET_CLASS (parse);
4164 *time = GST_CLOCK_TIME_NONE;
4165 *duration = GST_CLOCK_TIME_NONE;
4168 orig_offset = parse->priv->offset;
4169 orig_discont = parse->priv->discont;
4170 orig_drain = parse->priv->drain;
4172 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4173 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4175 /* jump elsewhere and locate next frame */
4176 parse->priv->offset = *pos;
4177 /* mark as scanning so frames don't get processed all the way */
4178 parse->priv->scanning = TRUE;
4179 ret = gst_base_parse_scan_frame (parse, klass);
4180 parse->priv->scanning = FALSE;
4181 /* retrieve frame found during scan */
4182 sframe = parse->priv->scanned_frame;
4183 parse->priv->scanned_frame = NULL;
4185 if (ret != GST_FLOW_OK || !sframe)
4188 /* get offset first, subclass parsing might dump other stuff in there */
4189 *pos = sframe->offset;
4190 buf = sframe->buffer;
4193 /* but it should provide proper time */
4194 *time = GST_BUFFER_TIMESTAMP (buf);
4195 *duration = GST_BUFFER_DURATION (buf);
4197 GST_LOG_OBJECT (parse,
4198 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4199 GST_TIME_ARGS (*time), *pos);
4203 gst_base_parse_frame_free (sframe);
4206 parse->priv->offset = orig_offset;
4207 parse->priv->discont = orig_discont;
4208 parse->priv->drain = orig_drain;
4213 /* bisect and scan through file for frame starting before @time,
4214 * returns OK and @time/@offset if found, NONE and/or error otherwise
4215 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4216 static GstFlowReturn
4217 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4220 GstFlowReturn ret = GST_FLOW_OK;
4221 gint64 lpos, hpos, newpos;
4222 GstClockTime time, ltime, htime, newtime, dur;
4223 gboolean cont = TRUE;
4224 const GstClockTime tolerance = TARGET_DIFFERENCE;
4225 const guint chunk = 4 * 1024;
4227 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4228 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4230 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4231 GST_TIME_ARGS (*_time));
4233 /* TODO also make keyframe aware if useful some day */
4248 /* do not know at first */
4250 *_time = GST_CLOCK_TIME_NONE;
4252 /* need initial positions; start and end */
4253 lpos = parse->priv->first_frame_offset;
4254 ltime = parse->priv->first_frame_pts;
4255 /* try other one if no luck */
4256 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4257 ltime = parse->priv->first_frame_dts;
4258 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4259 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4260 return GST_FLOW_ERROR;
4262 hpos = parse->priv->upstream_size;
4264 GST_DEBUG_OBJECT (parse,
4265 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4266 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4267 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4269 /* check preconditions are satisfied;
4270 * start and end are needed, except for special case where we scan for
4271 * last frame to determine duration */
4272 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4273 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4274 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4278 /* shortcut cases */
4281 } else if (time < ltime + tolerance) {
4285 } else if (time >= htime) {
4291 while (htime > ltime && cont) {
4292 GST_LOG_OBJECT (parse,
4293 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4294 GST_TIME_ARGS (ltime));
4295 GST_LOG_OBJECT (parse,
4296 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4297 GST_TIME_ARGS (htime));
4298 if (G_UNLIKELY (time == G_MAXINT64)) {
4300 } else if (G_LIKELY (hpos > lpos)) {
4302 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4305 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4307 /* we check this case once, but not forever, so break loop */
4312 newpos = CLAMP (newpos, lpos, hpos);
4313 GST_LOG_OBJECT (parse,
4314 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4315 GST_TIME_ARGS (time), newpos);
4317 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4318 if (ret == GST_FLOW_EOS) {
4319 /* heuristic HACK */
4320 hpos = MAX (lpos, hpos - chunk);
4322 } else if (ret != GST_FLOW_OK) {
4326 if (newtime == -1 || newpos == -1) {
4327 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4331 if (G_UNLIKELY (time == G_MAXINT64)) {
4334 if (GST_CLOCK_TIME_IS_VALID (dur))
4337 } else if (newtime > time) {
4339 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4341 } else if (newtime + tolerance > time) {
4342 /* close enough undershoot */
4346 } else if (newtime < ltime) {
4347 /* so a position beyond lpos resulted in earlier time than ltime ... */
4348 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4351 /* undershoot too far */
4352 newpos += newpos == lpos ? chunk : 0;
4353 lpos = CLAMP (newpos, lpos, hpos);
4359 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4360 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4365 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4366 gboolean before, GstClockTime * _ts)
4368 gint64 bytes = 0, ts = 0;
4369 GstIndexEntry *entry = NULL;
4371 if (time == GST_CLOCK_TIME_NONE) {
4377 GST_BASE_PARSE_INDEX_LOCK (parse);
4378 if (parse->priv->index) {
4379 /* Let's check if we have an index entry for that time */
4380 entry = gst_index_get_assoc_entry (parse->priv->index,
4381 parse->priv->index_id,
4382 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4383 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4387 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4388 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4390 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4391 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4392 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4394 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4395 GST_TIME_ARGS (time));
4398 ts = GST_CLOCK_TIME_NONE;
4401 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4410 /* returns TRUE if seek succeeded */
4412 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4417 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4418 gboolean flush, update, res = TRUE, accurate;
4419 gint64 start, stop, seekpos, seekstop;
4420 GstSegment seeksegment = { 0, };
4421 GstClockTime start_ts;
4423 GstEvent *segment_event;
4425 /* try upstream first, unless we're driving the streaming thread ourselves */
4426 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4427 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4432 gst_event_parse_seek (event, &rate, &format, &flags,
4433 &start_type, &start, &stop_type, &stop);
4434 seqnum = gst_event_get_seqnum (event);
4436 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4437 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4438 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4439 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4441 /* we can only handle TIME, so check if subclass can convert
4442 * to TIME format if it's some other format (such as DEFAULT) */
4443 if (format != GST_FORMAT_TIME) {
4444 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4445 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4447 goto no_convert_to_time;
4449 GST_INFO_OBJECT (parse, "converted %s format to start time "
4450 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4451 gst_format_get_name (format), GST_TIME_ARGS (start),
4452 GST_TIME_ARGS (stop));
4454 format = GST_FORMAT_TIME;
4457 /* no negative rates in push mode (unless upstream takes care of that, but
4458 * we've already tried upstream and it didn't handle the seek request) */
4459 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4462 if (start_type != GST_SEEK_TYPE_SET ||
4463 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4466 /* get flush flag */
4467 flush = flags & GST_SEEK_FLAG_FLUSH;
4469 /* copy segment, we need this because we still need the old
4470 * segment when we close the current segment. */
4471 gst_segment_copy_into (&parse->segment, &seeksegment);
4473 GST_DEBUG_OBJECT (parse, "configuring seek");
4474 gst_segment_do_seek (&seeksegment, rate, format, flags,
4475 start_type, start, stop_type, stop, &update);
4477 /* accurate seeking implies seek tables are used to obtain position,
4478 * and the requested segment is maintained exactly, not adjusted any way */
4479 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4481 /* maybe we can be accurate for (almost) free */
4482 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4483 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4484 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4489 GstClockTime startpos;
4491 startpos = seeksegment.position;
4495 /* accurate requested, so ... seek a bit before target */
4496 if (startpos < parse->priv->lead_in_ts)
4499 startpos -= parse->priv->lead_in_ts;
4501 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4502 seeksegment.stop = seeksegment.start + seeksegment.duration;
4504 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4505 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4509 start_ts = seeksegment.position;
4513 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4514 seeksegment.stop = seeksegment.start + seeksegment.duration;
4516 if (!gst_base_parse_convert (parse, format, start_ts,
4517 GST_FORMAT_BYTES, &seekpos))
4518 goto convert_failed;
4519 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4520 GST_FORMAT_BYTES, &seekstop))
4521 goto convert_failed;
4524 GST_DEBUG_OBJECT (parse,
4525 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4527 GST_DEBUG_OBJECT (parse,
4528 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4529 seeksegment.stop, seekstop);
4531 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4534 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4537 if (parse->srcpad) {
4538 GstEvent *fevent = gst_event_new_flush_start ();
4539 GST_DEBUG_OBJECT (parse, "sending flush start");
4541 gst_event_set_seqnum (fevent, seqnum);
4543 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4544 /* unlock upstream pull_range */
4545 gst_pad_push_event (parse->sinkpad, fevent);
4548 gst_pad_pause_task (parse->sinkpad);
4551 /* we should now be able to grab the streaming thread because we stopped it
4552 * with the above flush/pause code */
4553 GST_PAD_STREAM_LOCK (parse->sinkpad);
4555 /* save current position */
4556 last_stop = parse->segment.position;
4557 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4560 /* now commit to new position */
4562 /* prepare for streaming again */
4564 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4565 GST_DEBUG_OBJECT (parse, "sending flush stop");
4566 gst_event_set_seqnum (fevent, seqnum);
4567 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4568 gst_pad_push_event (parse->sinkpad, fevent);
4569 gst_base_parse_clear_queues (parse);
4571 /* keep track of our position */
4572 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4573 seeksegment.format, parse->segment.position);
4576 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4578 /* store the newsegment event so it can be sent from the streaming thread. */
4579 /* This will be sent later in _loop() */
4580 segment_event = gst_event_new_segment (&parse->segment);
4581 gst_event_set_seqnum (segment_event, seqnum);
4582 parse->priv->pending_events =
4583 g_list_prepend (parse->priv->pending_events, segment_event);
4585 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4586 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4587 ", time = %" GST_TIME_FORMAT, format,
4588 GST_TIME_ARGS (parse->segment.start),
4589 GST_TIME_ARGS (parse->segment.stop),
4590 GST_TIME_ARGS (parse->segment.time));
4592 /* one last chance in pull mode to stay accurate;
4593 * maybe scan and subclass can find where to go */
4596 GstClockTime ts = seeksegment.position;
4598 gst_base_parse_locate_time (parse, &ts, &scanpos);
4602 /* running collected index now consists of several intervals,
4603 * so optimized check no longer possible */
4604 parse->priv->index_last_valid = FALSE;
4605 parse->priv->index_last_offset = 0;
4606 parse->priv->index_last_ts = 0;
4610 /* mark discont if we are going to stream from another position. */
4611 if (seekpos != parse->priv->offset) {
4612 GST_DEBUG_OBJECT (parse,
4613 "mark DISCONT, we did a seek to another position");
4614 parse->priv->offset = seekpos;
4615 parse->priv->last_offset = seekpos;
4616 parse->priv->seen_keyframe = FALSE;
4617 parse->priv->discont = TRUE;
4618 parse->priv->next_dts = start_ts;
4619 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4620 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4621 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4622 parse->priv->sync_offset = seekpos;
4623 parse->priv->exact_position = accurate;
4626 /* Start streaming thread if paused */
4627 gst_pad_start_task (parse->sinkpad,
4628 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4630 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4635 GstEvent *new_event;
4636 GstBaseParseSeek *seek;
4637 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4639 /* The only thing we need to do in PUSH-mode is to send the
4640 seek event (in bytes) to upstream. Segment / flush handling happens
4641 in corresponding src event handlers */
4642 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4643 if (seekstop >= 0 && seekstop <= seekpos)
4645 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4646 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4647 gst_event_set_seqnum (new_event, seqnum);
4649 /* store segment info so its precise details can be reconstructed when
4650 * receiving newsegment;
4651 * this matters for all details when accurate seeking,
4652 * is most useful to preserve NONE stop time otherwise */
4653 seek = g_new0 (GstBaseParseSeek, 1);
4654 seek->segment = seeksegment;
4655 seek->accurate = accurate;
4656 seek->offset = seekpos;
4657 seek->start_ts = start_ts;
4658 GST_OBJECT_LOCK (parse);
4659 /* less optimal, but preserves order */
4660 parse->priv->pending_seeks =
4661 g_slist_append (parse->priv->pending_seeks, seek);
4662 GST_OBJECT_UNLOCK (parse);
4664 res = gst_pad_push_event (parse->sinkpad, new_event);
4667 GST_OBJECT_LOCK (parse);
4668 parse->priv->pending_seeks =
4669 g_slist_remove (parse->priv->pending_seeks, seek);
4670 GST_OBJECT_UNLOCK (parse);
4676 gst_event_unref (event);
4682 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4688 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4694 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4695 "couldn't convert that into TIME format", gst_format_get_name (format));
4701 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4708 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4710 if (taglist == parse->priv->upstream_tags)
4713 if (parse->priv->upstream_tags) {
4714 gst_tag_list_unref (parse->priv->upstream_tags);
4715 parse->priv->upstream_tags = NULL;
4718 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4720 if (taglist != NULL)
4721 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4723 gst_base_parse_check_bitrate_tags (parse);
4728 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4730 GstBaseParse *parse = GST_BASE_PARSE (element);
4732 GST_BASE_PARSE_INDEX_LOCK (parse);
4733 if (parse->priv->index)
4734 gst_object_unref (parse->priv->index);
4736 parse->priv->index = gst_object_ref (index);
4737 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4738 &parse->priv->index_id);
4739 parse->priv->own_index = FALSE;
4741 parse->priv->index = NULL;
4743 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4747 gst_base_parse_get_index (GstElement * element)
4749 GstBaseParse *parse = GST_BASE_PARSE (element);
4750 GstIndex *result = NULL;
4752 GST_BASE_PARSE_INDEX_LOCK (parse);
4753 if (parse->priv->index)
4754 result = gst_object_ref (parse->priv->index);
4755 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4761 static GstStateChangeReturn
4762 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4764 GstBaseParse *parse;
4765 GstStateChangeReturn result;
4767 parse = GST_BASE_PARSE (element);
4769 switch (transition) {
4770 case GST_STATE_CHANGE_READY_TO_PAUSED:
4771 /* If this is our own index destroy it as the
4772 * old entries might be wrong for the new stream */
4773 GST_BASE_PARSE_INDEX_LOCK (parse);
4774 if (parse->priv->own_index) {
4775 gst_object_unref (parse->priv->index);
4776 parse->priv->index = NULL;
4777 parse->priv->own_index = FALSE;
4780 /* If no index was created, generate one */
4781 if (G_UNLIKELY (!parse->priv->index)) {
4782 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4784 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4785 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4786 &parse->priv->index_id);
4787 parse->priv->own_index = TRUE;
4789 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4795 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4797 switch (transition) {
4798 case GST_STATE_CHANGE_PAUSED_TO_READY:
4799 gst_base_parse_reset (parse);
4809 * gst_base_parse_set_ts_at_offset:
4810 * @parse: a #GstBaseParse
4811 * @offset: offset into current buffer
4813 * This function should only be called from a @handle_frame implementation.
4815 * #GstBaseParse creates initial timestamps for frames by using the last
4816 * timestamp seen in the stream before the frame starts. In certain
4817 * cases, the correct timestamps will occur in the stream after the
4818 * start of the frame, but before the start of the actual picture data.
4819 * This function can be used to set the timestamps based on the offset
4820 * into the frame data that the picture starts.
4825 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4827 GstClockTime pts, dts;
4829 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4831 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4832 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4834 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4835 GST_DEBUG_OBJECT (parse,
4836 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4837 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4839 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4840 parse->priv->prev_pts = parse->priv->next_pts = pts;
4842 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4843 parse->priv->prev_dts = parse->priv->next_dts = dts;
4847 * gst_base_parse_merge_tags:
4848 * @parse: a #GstBaseParse
4849 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4850 * previously-set tags
4851 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4853 * Sets the parser subclass's tags and how they should be merged with any
4854 * upstream stream tags. This will override any tags previously-set
4855 * with gst_base_parse_merge_tags().
4857 * Note that this is provided for convenience, and the subclass is
4858 * not required to use this and can still do tag handling on its own.
4863 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4864 GstTagMergeMode mode)
4866 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4867 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4868 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4870 GST_OBJECT_LOCK (parse);
4872 if (tags != parse->priv->parser_tags) {
4873 if (parse->priv->parser_tags) {
4874 gst_tag_list_unref (parse->priv->parser_tags);
4875 parse->priv->parser_tags = NULL;
4876 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4879 parse->priv->parser_tags = gst_tag_list_ref (tags);
4880 parse->priv->parser_tags_merge_mode = mode;
4883 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4884 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4886 gst_base_parse_check_bitrate_tags (parse);
4887 parse->priv->tags_changed = TRUE;
4890 GST_OBJECT_UNLOCK (parse);