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 overriden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
221 #define MAX_INDEX_ENTRIES 4096
223 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
224 #define GST_CAT_DEFAULT gst_base_parse_debug
226 /* Supported formats */
227 static const GstFormat fmtlist[] = {
234 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
235 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
237 struct _GstBaseParsePrivate
244 GstFormat duration_fmt;
245 gint64 estimated_duration;
246 gint64 estimated_drift;
248 guint min_frame_size;
249 gboolean passthrough;
250 gboolean pts_interpolate;
252 gboolean has_timing_info;
253 guint fps_num, fps_den;
254 gint update_interval;
256 guint lead_in, lead_out;
257 GstClockTime lead_in_ts, lead_out_ts;
258 GstClockTime min_latency, max_latency;
266 GstClockTime next_pts;
267 GstClockTime next_dts;
268 GstClockTime prev_pts;
269 GstClockTime prev_dts;
270 GstClockTime frame_duration;
271 gboolean seen_keyframe;
277 guint64 data_bytecount;
278 guint64 acc_duration;
279 GstClockTime first_frame_pts;
280 GstClockTime first_frame_dts;
281 gint64 first_frame_offset;
283 gboolean post_min_bitrate;
284 gboolean post_avg_bitrate;
285 gboolean post_max_bitrate;
289 guint posted_avg_bitrate;
291 /* frames/buffers that are queued and ready to go on OK */
292 GQueue queued_frames;
296 /* index entry storage, either ours or provided */
302 /* seek table entries only maintained if upstream is BYTE seekable */
303 gboolean upstream_seekable;
304 gboolean upstream_has_duration;
305 gint64 upstream_size;
306 /* minimum distance between two index entries */
307 GstClockTimeDiff idx_interval;
308 guint64 idx_byte_interval;
309 /* ts and offset of last entry added */
310 GstClockTime index_last_ts;
311 gint64 index_last_offset;
312 gboolean index_last_valid;
314 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
315 gboolean exact_position;
316 /* seek events are temporarily kept to match them with newsegments */
317 GSList *pending_seeks;
319 /* reverse playback */
320 GSList *buffers_pending;
321 GSList *buffers_head;
322 GSList *buffers_queued;
323 GSList *buffers_send;
324 GstClockTime last_pts;
325 GstClockTime last_dts;
328 /* Pending serialized events */
329 GList *pending_events;
330 /* Newsegment event to be sent after SEEK */
331 gboolean pending_segment;
333 /* offset of last parsed frame/data */
335 /* force a new frame, regardless of offset */
337 /* whether we are merely scanning for a frame */
339 /* ... and resulting frame, if any */
340 GstBaseParseFrame *scanned_frame;
342 /* TRUE if we're still detecting the format, i.e.
343 * if ::detect() is still called for future buffers */
345 GList *detect_buffers;
346 guint detect_buffers_size;
348 /* if TRUE, a STREAM_START event needs to be pushed */
349 gboolean push_stream_start;
352 typedef struct _GstBaseParseSeek
357 GstClockTime start_ts;
360 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
361 g_mutex_lock (&parse->priv->index_lock);
362 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
363 g_mutex_unlock (&parse->priv->index_lock);
365 static GstElementClass *parent_class = NULL;
367 static void gst_base_parse_class_init (GstBaseParseClass * klass);
368 static void gst_base_parse_init (GstBaseParse * parse,
369 GstBaseParseClass * klass);
372 gst_base_parse_get_type (void)
374 static volatile gsize base_parse_type = 0;
376 if (g_once_init_enter (&base_parse_type)) {
377 static const GTypeInfo base_parse_info = {
378 sizeof (GstBaseParseClass),
379 (GBaseInitFunc) NULL,
380 (GBaseFinalizeFunc) NULL,
381 (GClassInitFunc) gst_base_parse_class_init,
384 sizeof (GstBaseParse),
386 (GInstanceInitFunc) gst_base_parse_init,
390 _type = g_type_register_static (GST_TYPE_ELEMENT,
391 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
392 g_once_init_leave (&base_parse_type, _type);
394 return (GType) base_parse_type;
397 static void gst_base_parse_finalize (GObject * object);
399 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
400 GstStateChange transition);
401 static void gst_base_parse_reset (GstBaseParse * parse);
404 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
405 static GstIndex *gst_base_parse_get_index (GstElement * element);
408 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
410 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
411 GstObject * parent, GstPadMode mode, gboolean active);
412 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
414 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
416 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
418 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
421 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
423 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
426 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
428 static void gst_base_parse_loop (GstPad * pad);
430 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
431 GstBaseParseFrame * frame);
433 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
436 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
439 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
441 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
444 static void gst_base_parse_drain (GstBaseParse * parse);
446 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
447 gboolean post_min, gboolean post_avg, gboolean post_max);
449 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
450 GstClockTime time, gboolean before, GstClockTime * _ts);
451 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
452 GstClockTime * _time, gint64 * _offset);
454 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
455 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
458 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
460 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
463 gst_base_parse_clear_queues (GstBaseParse * parse)
465 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
466 g_slist_free (parse->priv->buffers_queued);
467 parse->priv->buffers_queued = NULL;
468 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
470 g_slist_free (parse->priv->buffers_pending);
471 parse->priv->buffers_pending = NULL;
472 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
473 g_slist_free (parse->priv->buffers_head);
474 parse->priv->buffers_head = NULL;
475 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
476 g_slist_free (parse->priv->buffers_send);
477 parse->priv->buffers_send = NULL;
479 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
480 g_list_free (parse->priv->detect_buffers);
481 parse->priv->detect_buffers = NULL;
482 parse->priv->detect_buffers_size = 0;
484 g_queue_foreach (&parse->priv->queued_frames,
485 (GFunc) gst_base_parse_frame_free, NULL);
486 g_queue_clear (&parse->priv->queued_frames);
488 gst_buffer_replace (&parse->priv->cache, NULL);
490 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
491 g_list_free (parse->priv->pending_events);
492 parse->priv->pending_events = NULL;
493 parse->priv->pending_segment = FALSE;
497 gst_base_parse_finalize (GObject * object)
499 GstBaseParse *parse = GST_BASE_PARSE (object);
501 g_object_unref (parse->priv->adapter);
503 if (parse->priv->cache) {
504 gst_buffer_unref (parse->priv->cache);
505 parse->priv->cache = NULL;
508 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
510 g_list_free (parse->priv->pending_events);
511 parse->priv->pending_events = NULL;
512 parse->priv->pending_segment = FALSE;
514 if (parse->priv->index) {
515 gst_object_unref (parse->priv->index);
516 parse->priv->index = NULL;
518 g_mutex_clear (&parse->priv->index_lock);
520 gst_base_parse_clear_queues (parse);
522 G_OBJECT_CLASS (parent_class)->finalize (object);
526 gst_base_parse_class_init (GstBaseParseClass * klass)
528 GObjectClass *gobject_class;
529 GstElementClass *gstelement_class;
531 gobject_class = G_OBJECT_CLASS (klass);
532 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
533 parent_class = g_type_class_peek_parent (klass);
534 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
536 gstelement_class = (GstElementClass *) klass;
537 gstelement_class->change_state =
538 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
541 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
542 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
545 /* Default handlers */
546 klass->sink_event = gst_base_parse_sink_event_default;
547 klass->src_event = gst_base_parse_src_event_default;
548 klass->sink_query = gst_base_parse_sink_query_default;
549 klass->src_query = gst_base_parse_src_query_default;
550 klass->convert = gst_base_parse_convert_default;
552 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
553 "baseparse element");
557 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
559 GstPadTemplate *pad_template;
561 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
563 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
566 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
567 g_return_if_fail (pad_template != NULL);
568 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
569 gst_pad_set_event_function (parse->sinkpad,
570 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
571 gst_pad_set_query_function (parse->sinkpad,
572 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
573 gst_pad_set_chain_function (parse->sinkpad,
574 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
575 gst_pad_set_activate_function (parse->sinkpad,
576 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
577 gst_pad_set_activatemode_function (parse->sinkpad,
578 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
579 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
580 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
582 GST_DEBUG_OBJECT (parse, "sinkpad created");
585 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
586 g_return_if_fail (pad_template != NULL);
587 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
588 gst_pad_set_event_function (parse->srcpad,
589 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
590 gst_pad_set_query_function (parse->srcpad,
591 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
592 gst_pad_use_fixed_caps (parse->srcpad);
593 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
594 GST_DEBUG_OBJECT (parse, "src created");
596 g_queue_init (&parse->priv->queued_frames);
598 parse->priv->adapter = gst_adapter_new ();
600 parse->priv->pad_mode = GST_PAD_MODE_NONE;
602 g_mutex_init (&parse->priv->index_lock);
605 gst_base_parse_reset (parse);
606 GST_DEBUG_OBJECT (parse, "init ok");
608 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
611 static GstBaseParseFrame *
612 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
614 GstBaseParseFrame *copy;
616 copy = g_slice_dup (GstBaseParseFrame, frame);
617 copy->buffer = gst_buffer_ref (frame->buffer);
618 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
620 GST_TRACE ("copied frame %p -> %p", frame, copy);
626 gst_base_parse_frame_free (GstBaseParseFrame * frame)
628 GST_TRACE ("freeing frame %p", frame);
631 gst_buffer_unref (frame->buffer);
632 frame->buffer = NULL;
635 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
636 g_slice_free (GstBaseParseFrame, frame);
638 memset (frame, 0, sizeof (*frame));
642 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
643 (GBoxedCopyFunc) gst_base_parse_frame_copy,
644 (GBoxedFreeFunc) gst_base_parse_frame_free);
647 * gst_base_parse_frame_init:
648 * @frame: #GstBaseParseFrame.
650 * Sets a #GstBaseParseFrame to initial state. Currently this means
651 * all public fields are zero-ed and a private flag is set to make
652 * sure gst_base_parse_frame_free() only frees the contents but not
653 * the actual frame. Use this function to initialise a #GstBaseParseFrame
654 * allocated on the stack.
657 gst_base_parse_frame_init (GstBaseParseFrame * frame)
659 memset (frame, 0, sizeof (GstBaseParseFrame));
660 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
661 GST_TRACE ("inited frame %p", frame);
665 * gst_base_parse_frame_new:
666 * @buffer: (transfer none): a #GstBuffer
668 * @overhead: number of bytes in this frame which should be counted as
669 * metadata overhead, ie. not used to calculate the average bitrate.
670 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
672 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
673 * elements written in C should usually allocate the frame on the stack and
674 * then use gst_base_parse_frame_init() to initialise it.
676 * Returns: a newly-allocated #GstBaseParseFrame. Free with
677 * gst_base_parse_frame_free() when no longer needed.
680 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
683 GstBaseParseFrame *frame;
685 frame = g_slice_new0 (GstBaseParseFrame);
686 frame->buffer = gst_buffer_ref (buffer);
688 GST_TRACE ("created frame %p", frame);
693 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
696 gst_buffer_replace (&frame->buffer, buf);
700 /* set flags one by one for clarity */
701 if (G_UNLIKELY (parse->priv->drain))
702 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
704 /* losing sync is pretty much a discont (and vice versa), no ? */
705 if (G_UNLIKELY (parse->priv->discont))
706 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
710 gst_base_parse_reset (GstBaseParse * parse)
712 GST_OBJECT_LOCK (parse);
713 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
714 parse->priv->duration = -1;
715 parse->priv->min_frame_size = 1;
716 parse->priv->discont = TRUE;
717 parse->priv->flushing = FALSE;
718 parse->priv->offset = 0;
719 parse->priv->sync_offset = 0;
720 parse->priv->update_interval = -1;
721 parse->priv->fps_num = parse->priv->fps_den = 0;
722 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
723 parse->priv->lead_in = parse->priv->lead_out = 0;
724 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
725 parse->priv->bitrate = 0;
726 parse->priv->framecount = 0;
727 parse->priv->bytecount = 0;
728 parse->priv->acc_duration = 0;
729 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
730 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
731 parse->priv->first_frame_offset = -1;
732 parse->priv->estimated_duration = -1;
733 parse->priv->estimated_drift = 0;
734 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
735 parse->priv->next_dts = 0;
736 parse->priv->syncable = TRUE;
737 parse->priv->passthrough = FALSE;
738 parse->priv->pts_interpolate = TRUE;
739 parse->priv->has_timing_info = FALSE;
740 parse->priv->post_min_bitrate = TRUE;
741 parse->priv->post_avg_bitrate = TRUE;
742 parse->priv->post_max_bitrate = TRUE;
743 parse->priv->min_bitrate = G_MAXUINT;
744 parse->priv->max_bitrate = 0;
745 parse->priv->avg_bitrate = 0;
746 parse->priv->posted_avg_bitrate = 0;
748 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
749 parse->priv->index_last_offset = -1;
750 parse->priv->index_last_valid = TRUE;
751 parse->priv->upstream_seekable = FALSE;
752 parse->priv->upstream_size = 0;
753 parse->priv->upstream_has_duration = FALSE;
754 parse->priv->idx_interval = 0;
755 parse->priv->idx_byte_interval = 0;
756 parse->priv->exact_position = TRUE;
757 parse->priv->seen_keyframe = FALSE;
759 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
760 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
761 parse->priv->last_offset = 0;
763 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
765 g_list_free (parse->priv->pending_events);
766 parse->priv->pending_events = NULL;
767 parse->priv->pending_segment = FALSE;
769 if (parse->priv->cache) {
770 gst_buffer_unref (parse->priv->cache);
771 parse->priv->cache = NULL;
774 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
775 g_slist_free (parse->priv->pending_seeks);
776 parse->priv->pending_seeks = NULL;
778 if (parse->priv->adapter)
779 gst_adapter_clear (parse->priv->adapter);
781 parse->priv->new_frame = TRUE;
783 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
784 g_list_free (parse->priv->detect_buffers);
785 parse->priv->detect_buffers = NULL;
786 parse->priv->detect_buffers_size = 0;
787 GST_OBJECT_UNLOCK (parse);
790 /* gst_base_parse_parse_frame:
791 * @parse: #GstBaseParse.
792 * @buffer: #GstBuffer.
794 * Default callback for parse_frame.
797 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
799 GstBuffer *buffer = frame->buffer;
801 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
802 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
803 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
805 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
806 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
807 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
809 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
810 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
811 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
816 /* gst_base_parse_convert:
817 * @parse: #GstBaseParse.
818 * @src_format: #GstFormat describing the source format.
819 * @src_value: Source value to be converted.
820 * @dest_format: #GstFormat defining the converted format.
821 * @dest_value: Pointer where the conversion result will be put.
823 * Converts using configured "convert" vmethod in #GstBaseParse class.
825 * Returns: TRUE if conversion was successful.
828 gst_base_parse_convert (GstBaseParse * parse,
829 GstFormat src_format,
830 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
832 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
835 g_return_val_if_fail (dest_value != NULL, FALSE);
840 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
842 #ifndef GST_DISABLE_GST_DEBUG
845 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
846 GST_LOG_OBJECT (parse,
847 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
848 GST_TIME_ARGS (src_value), *dest_value);
849 } else if (dest_format == GST_FORMAT_TIME &&
850 src_format == GST_FORMAT_BYTES) {
851 GST_LOG_OBJECT (parse,
852 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
853 src_value, GST_TIME_ARGS (*dest_value));
855 GST_LOG_OBJECT (parse,
856 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
857 GST_STR_NULL (gst_format_get_name (src_format)),
858 GST_STR_NULL (gst_format_get_name (dest_format)),
859 src_value, *dest_value);
862 GST_DEBUG_OBJECT (parse, "conversion failed");
870 /* gst_base_parse_sink_event:
871 * @pad: #GstPad that received the event.
872 * @event: #GstEvent to be handled.
874 * Handler for sink pad events.
876 * Returns: TRUE if the event was handled.
879 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
881 GstBaseParse *parse = GST_BASE_PARSE (parent);
882 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
885 ret = bclass->sink_event (parse, event);
891 /* gst_base_parse_sink_event_default:
892 * @parse: #GstBaseParse.
893 * @event: #GstEvent to be handled.
895 * Element-level event handler function.
897 * The event will be unreffed only if it has been handled and this
898 * function returns %TRUE
900 * Returns: %TRUE if the event was handled and not need forwarding.
903 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
905 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
906 gboolean ret = FALSE;
907 gboolean forward_immediate = FALSE;
909 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
910 GST_EVENT_TYPE_NAME (event));
912 switch (GST_EVENT_TYPE (event)) {
917 gst_event_parse_caps (event, &caps);
918 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
920 if (klass->set_sink_caps)
921 ret = klass->set_sink_caps (parse, caps);
925 /* will send our own caps downstream */
926 gst_event_unref (event);
930 case GST_EVENT_SEGMENT:
932 const GstSegment *in_segment;
933 GstSegment out_segment;
934 gint64 offset = 0, next_dts;
936 gst_event_parse_segment (event, &in_segment);
937 gst_segment_init (&out_segment, GST_FORMAT_TIME);
939 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
941 if (in_segment->format == GST_FORMAT_BYTES) {
942 GstBaseParseSeek *seek = NULL;
945 /* stop time is allowed to be open-ended, but not start & pos */
946 offset = in_segment->time;
948 GST_OBJECT_LOCK (parse);
949 for (node = parse->priv->pending_seeks; node; node = node->next) {
950 GstBaseParseSeek *tmp = node->data;
952 if (tmp->offset == offset) {
957 parse->priv->pending_seeks =
958 g_slist_remove (parse->priv->pending_seeks, seek);
959 GST_OBJECT_UNLOCK (parse);
962 GST_DEBUG_OBJECT (parse,
963 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
964 seek->accurate ? " accurate" : "", &seek->segment);
966 out_segment.start = seek->segment.start;
967 out_segment.stop = seek->segment.stop;
968 out_segment.time = seek->segment.start;
970 next_dts = seek->start_ts;
971 parse->priv->exact_position = seek->accurate;
974 /* best attempt convert */
975 /* as these are only estimates, stop is kept open-ended to avoid
976 * premature cutting */
977 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
978 GST_FORMAT_TIME, (gint64 *) & next_dts);
980 out_segment.start = next_dts;
981 out_segment.stop = GST_CLOCK_TIME_NONE;
982 out_segment.time = next_dts;
984 parse->priv->exact_position = (in_segment->start == 0);
987 gst_event_unref (event);
989 event = gst_event_new_segment (&out_segment);
991 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
992 GST_SEGMENT_FORMAT, in_segment);
994 } else if (in_segment->format != GST_FORMAT_TIME) {
995 /* Unknown incoming segment format. Output a default open-ended
997 gst_event_unref (event);
999 out_segment.start = 0;
1000 out_segment.stop = GST_CLOCK_TIME_NONE;
1001 out_segment.time = 0;
1003 event = gst_event_new_segment (&out_segment);
1007 /* not considered BYTE seekable if it is talking to us in TIME,
1008 * whatever else it might claim */
1009 parse->priv->upstream_seekable = FALSE;
1010 next_dts = in_segment->start;
1013 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1016 gst_segment_set_newsegment (&parse->segment, update, rate,
1017 applied_rate, format, start, stop, start);
1020 /* save the segment for later, right before we push a new buffer so that
1021 * the caps are fixed and the next linked element can receive
1023 parse->priv->pending_segment = TRUE;
1026 /* but finish the current segment */
1027 GST_DEBUG_OBJECT (parse, "draining current segment");
1028 if (in_segment->rate > 0.0)
1029 gst_base_parse_drain (parse);
1031 gst_base_parse_finish_fragment (parse, FALSE);
1032 gst_adapter_clear (parse->priv->adapter);
1034 parse->priv->offset = offset;
1035 parse->priv->sync_offset = offset;
1036 parse->priv->next_dts = next_dts;
1037 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1038 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1039 parse->priv->discont = TRUE;
1040 parse->priv->seen_keyframe = FALSE;
1044 case GST_EVENT_FLUSH_START:
1045 GST_OBJECT_LOCK (parse);
1046 parse->priv->flushing = TRUE;
1047 GST_OBJECT_UNLOCK (parse);
1050 case GST_EVENT_FLUSH_STOP:
1051 gst_adapter_clear (parse->priv->adapter);
1052 gst_base_parse_clear_queues (parse);
1053 parse->priv->flushing = FALSE;
1054 parse->priv->discont = TRUE;
1055 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1056 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1057 parse->priv->new_frame = TRUE;
1059 forward_immediate = TRUE;
1063 if (parse->segment.rate > 0.0)
1064 gst_base_parse_drain (parse);
1066 gst_base_parse_finish_fragment (parse, TRUE);
1068 /* If we STILL have zero frames processed, fire an error */
1069 if (parse->priv->framecount == 0) {
1070 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1071 ("No valid frames found before end of stream"), (NULL));
1073 /* newsegment and other serialized events before eos */
1074 if (G_UNLIKELY (parse->priv->pending_events)) {
1077 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1078 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1080 g_list_free (parse->priv->pending_events);
1081 parse->priv->pending_events = NULL;
1082 parse->priv->pending_segment = FALSE;
1084 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1085 /* We've not posted bitrate tags yet - do so now */
1086 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1088 forward_immediate = TRUE;
1090 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1091 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1092 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1093 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1096 const GstStructure *s;
1097 gboolean ev_still_state;
1099 s = gst_event_get_structure (event);
1101 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1102 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1103 if (ev_still_state) {
1104 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1105 if (parse->segment.rate > 0.0)
1106 gst_base_parse_drain (parse);
1108 gst_base_parse_finish_fragment (parse, TRUE);
1110 forward_immediate = TRUE;
1116 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1117 if (parse->segment.rate > 0.0)
1118 gst_base_parse_drain (parse);
1120 gst_base_parse_finish_fragment (parse, TRUE);
1121 forward_immediate = TRUE;
1125 /* See if any bitrate tags were posted */
1126 gst_base_parse_handle_tag (parse, event);
1129 case GST_EVENT_STREAM_START:
1130 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1131 forward_immediate = TRUE;
1138 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1139 * For EOS this is required because no buffer or serialized event
1140 * will come after EOS and nothing could trigger another
1141 * _finish_frame() call. *
1142 * If the subclass handles sending of EOS manually it can return
1143 * _DROPPED from ::finish() and all other subclasses should have
1144 * decoded/flushed all remaining data before this
1146 * For FLUSH_STOP this is required because it is expected
1147 * to be forwarded immediately and no buffers are queued anyway.
1150 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1151 ret = gst_pad_push_event (parse->srcpad, event);
1153 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1154 parse->priv->pending_events =
1155 g_list_prepend (parse->priv->pending_events, event);
1156 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1161 GST_DEBUG_OBJECT (parse, "event handled");
1167 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1172 pad = GST_BASE_PARSE_SINK_PAD (parse);
1174 switch (GST_QUERY_TYPE (query)) {
1175 case GST_QUERY_CAPS:
1177 GstBaseParseClass *bclass;
1179 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1181 if (bclass->get_sink_caps) {
1182 GstCaps *caps, *filter;
1184 gst_query_parse_caps (query, &filter);
1185 caps = bclass->get_sink_caps (parse, filter);
1186 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1188 gst_query_set_caps_result (query, caps);
1189 gst_caps_unref (caps);
1193 GstCaps *caps, *template_caps, *filter;
1195 gst_query_parse_caps (query, &filter);
1196 template_caps = gst_pad_get_pad_template_caps (pad);
1197 if (filter != NULL) {
1199 gst_caps_intersect_full (filter, template_caps,
1200 GST_CAPS_INTERSECT_FIRST);
1201 gst_caps_unref (template_caps);
1203 caps = template_caps;
1205 gst_query_set_caps_result (query, caps);
1206 gst_caps_unref (caps);
1214 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1223 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1225 GstBaseParseClass *bclass;
1226 GstBaseParse *parse;
1229 parse = GST_BASE_PARSE (parent);
1230 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1232 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1234 if (bclass->sink_query)
1235 ret = bclass->sink_query (parse, query);
1239 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1240 GST_QUERY_TYPE_NAME (query), ret, query);
1246 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1248 GstBaseParseClass *bclass;
1249 GstBaseParse *parse;
1252 parse = GST_BASE_PARSE (parent);
1253 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1255 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1256 GST_QUERY_TYPE_NAME (query), query);
1258 if (bclass->src_query)
1259 ret = bclass->src_query (parse, query);
1263 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1264 GST_QUERY_TYPE_NAME (query), ret, query);
1269 /* gst_base_parse_src_event:
1270 * @pad: #GstPad that received the event.
1271 * @event: #GstEvent that was received.
1273 * Handler for source pad events.
1275 * Returns: TRUE if the event was handled.
1278 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1280 GstBaseParse *parse;
1281 GstBaseParseClass *bclass;
1282 gboolean ret = TRUE;
1284 parse = GST_BASE_PARSE (parent);
1285 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1287 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1288 GST_EVENT_TYPE_NAME (event));
1290 if (bclass->src_event)
1291 ret = bclass->src_event (parse, event);
1293 gst_event_unref (event);
1299 gst_base_parse_is_seekable (GstBaseParse * parse)
1301 /* FIXME: could do more here, e.g. check index or just send data from 0
1302 * in pull mode and let decoder/sink clip */
1303 return parse->priv->syncable;
1306 /* gst_base_parse_src_event_default:
1307 * @parse: #GstBaseParse.
1308 * @event: #GstEvent that was received.
1310 * Default srcpad event handler.
1312 * Returns: TRUE if the event was handled and can be dropped.
1315 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1317 gboolean res = FALSE;
1319 switch (GST_EVENT_TYPE (event)) {
1320 case GST_EVENT_SEEK:
1321 if (gst_base_parse_is_seekable (parse))
1322 res = gst_base_parse_handle_seek (parse, event);
1325 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1334 * gst_base_parse_convert_default:
1335 * @parse: #GstBaseParse.
1336 * @src_format: #GstFormat describing the source format.
1337 * @src_value: Source value to be converted.
1338 * @dest_format: #GstFormat defining the converted format.
1339 * @dest_value: Pointer where the conversion result will be put.
1341 * Default implementation of "convert" vmethod in #GstBaseParse class.
1343 * Returns: TRUE if conversion was successful.
1346 gst_base_parse_convert_default (GstBaseParse * parse,
1347 GstFormat src_format,
1348 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1350 gboolean ret = FALSE;
1351 guint64 bytes, duration;
1353 if (G_UNLIKELY (src_format == dest_format)) {
1354 *dest_value = src_value;
1358 if (G_UNLIKELY (src_value == -1)) {
1363 if (G_UNLIKELY (src_value == 0)) {
1368 /* need at least some frames */
1369 if (!parse->priv->framecount)
1372 duration = parse->priv->acc_duration / GST_MSECOND;
1373 bytes = parse->priv->bytecount;
1375 if (G_UNLIKELY (!duration || !bytes))
1376 goto no_duration_bytes;
1378 if (src_format == GST_FORMAT_BYTES) {
1379 if (dest_format == GST_FORMAT_TIME) {
1380 /* BYTES -> TIME conversion */
1381 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1382 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1383 *dest_value *= GST_MSECOND;
1384 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1385 *dest_value / GST_MSECOND);
1388 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1390 } else if (src_format == GST_FORMAT_TIME) {
1391 if (dest_format == GST_FORMAT_BYTES) {
1392 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1393 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1395 GST_DEBUG_OBJECT (parse,
1396 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1397 src_value / GST_MSECOND, *dest_value);
1400 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1402 } else if (src_format == GST_FORMAT_DEFAULT) {
1403 /* DEFAULT == frame-based */
1404 if (dest_format == GST_FORMAT_TIME) {
1405 GST_DEBUG_OBJECT (parse, "converting default -> time");
1406 if (parse->priv->fps_den) {
1407 *dest_value = gst_util_uint64_scale (src_value,
1408 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1412 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1415 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1422 GST_DEBUG_OBJECT (parse, "no framecount");
1427 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1428 G_GUINT64_FORMAT, duration, bytes);
1435 gst_base_parse_update_duration (GstBaseParse * baseparse)
1438 GstBaseParse *parse;
1440 parse = GST_BASE_PARSE (baseparse);
1442 peer = gst_pad_get_peer (parse->sinkpad);
1444 gboolean qres = FALSE;
1445 gint64 ptot, dest_value;
1447 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1448 gst_object_unref (GST_OBJECT (peer));
1450 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1451 GST_FORMAT_TIME, &dest_value)) {
1453 /* inform if duration changed, but try to avoid spamming */
1454 parse->priv->estimated_drift +=
1455 dest_value - parse->priv->estimated_duration;
1456 if (parse->priv->estimated_drift > GST_SECOND ||
1457 parse->priv->estimated_drift < -GST_SECOND) {
1458 gst_element_post_message (GST_ELEMENT (parse),
1459 gst_message_new_duration_changed (GST_OBJECT (parse)));
1460 parse->priv->estimated_drift = 0;
1462 parse->priv->estimated_duration = dest_value;
1463 GST_LOG_OBJECT (parse,
1464 "updated estimated duration to %" GST_TIME_FORMAT,
1465 GST_TIME_ARGS (dest_value));
1472 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1473 gboolean post_avg, gboolean post_max)
1475 GstTagList *taglist = NULL;
1477 if (post_min && parse->priv->post_min_bitrate) {
1478 taglist = gst_tag_list_new_empty ();
1480 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1481 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1484 if (post_avg && parse->priv->post_avg_bitrate) {
1485 if (taglist == NULL)
1486 taglist = gst_tag_list_new_empty ();
1488 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1489 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1490 parse->priv->avg_bitrate, NULL);
1493 if (post_max && parse->priv->post_max_bitrate) {
1494 if (taglist == NULL)
1495 taglist = gst_tag_list_new_empty ();
1497 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1498 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1501 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1502 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1503 parse->priv->max_bitrate);
1505 if (taglist != NULL) {
1506 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1510 /* gst_base_parse_update_bitrates:
1511 * @parse: #GstBaseParse.
1512 * @buffer: Current frame as a #GstBuffer
1514 * Keeps track of the minimum and maximum bitrates, and also maintains a
1515 * running average bitrate of the stream so far.
1518 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1520 /* Only update the tag on a 10 kbps delta */
1521 static const gint update_threshold = 10000;
1523 guint64 data_len, frame_dur;
1524 gint overhead, frame_bitrate, old_avg_bitrate;
1525 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1526 GstBuffer *buffer = frame->buffer;
1528 overhead = frame->overhead;
1532 data_len = gst_buffer_get_size (buffer) - overhead;
1533 parse->priv->data_bytecount += data_len;
1535 /* duration should be valid by now,
1536 * either set by subclass or maybe based on fps settings */
1537 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1538 /* Calculate duration of a frame from buffer properties */
1539 frame_dur = GST_BUFFER_DURATION (buffer);
1540 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1541 parse->priv->acc_duration;
1544 /* No way to figure out frame duration (is this even possible?) */
1548 /* override if subclass provided bitrate, e.g. metadata based */
1549 if (parse->priv->bitrate) {
1550 parse->priv->avg_bitrate = parse->priv->bitrate;
1551 /* spread this (confirmed) info ASAP */
1552 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1553 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1557 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1561 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1562 parse->priv->avg_bitrate);
1564 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1566 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1567 /* always post all at threshold time */
1568 update_min = update_max = update_avg = TRUE;
1571 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1572 if (frame_bitrate < parse->priv->min_bitrate) {
1573 parse->priv->min_bitrate = frame_bitrate;
1577 if (frame_bitrate > parse->priv->max_bitrate) {
1578 parse->priv->max_bitrate = frame_bitrate;
1582 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1583 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1584 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1589 if ((update_min || update_avg || update_max))
1590 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1597 * gst_base_parse_add_index_entry:
1598 * @parse: #GstBaseParse.
1599 * @offset: offset of entry
1600 * @ts: timestamp associated with offset
1601 * @key: whether entry refers to keyframe
1602 * @force: add entry disregarding sanity checks
1604 * Adds an entry to the index associating @offset to @ts. It is recommended
1605 * to only add keyframe entries. @force allows to bypass checks, such as
1606 * whether the stream is (upstream) seekable, another entry is already "close"
1607 * to the new entry, etc.
1609 * Returns: #gboolean indicating whether entry was added
1612 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1613 GstClockTime ts, gboolean key, gboolean force)
1615 gboolean ret = FALSE;
1616 GstIndexAssociation associations[2];
1618 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1619 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1621 if (G_LIKELY (!force)) {
1623 if (!parse->priv->upstream_seekable) {
1624 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1628 /* FIXME need better helper data structure that handles these issues
1629 * related to ongoing collecting of index entries */
1630 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1632 GST_LOG_OBJECT (parse,
1633 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1634 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1638 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1639 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1640 parse->priv->idx_interval) {
1641 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1642 GST_TIME_ARGS (parse->priv->index_last_ts));
1646 /* if last is not really the last one */
1647 if (!parse->priv->index_last_valid) {
1648 GstClockTime prev_ts;
1650 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1651 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1652 GST_LOG_OBJECT (parse,
1653 "entry too close to existing entry %" GST_TIME_FORMAT,
1654 GST_TIME_ARGS (prev_ts));
1655 parse->priv->index_last_offset = offset;
1656 parse->priv->index_last_ts = ts;
1662 associations[0].format = GST_FORMAT_TIME;
1663 associations[0].value = ts;
1664 associations[1].format = GST_FORMAT_BYTES;
1665 associations[1].value = offset;
1667 /* index might change on-the-fly, although that would be nutty app ... */
1668 GST_BASE_PARSE_INDEX_LOCK (parse);
1669 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1670 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1671 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1672 (const GstIndexAssociation *) &associations);
1673 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1676 parse->priv->index_last_offset = offset;
1677 parse->priv->index_last_ts = ts;
1686 /* check for seekable upstream, above and beyond a mere query */
1688 gst_base_parse_check_seekability (GstBaseParse * parse)
1691 gboolean seekable = FALSE;
1692 gint64 start = -1, stop = -1;
1693 guint idx_interval = 0;
1694 guint64 idx_byte_interval = 0;
1696 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1697 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1698 GST_DEBUG_OBJECT (parse, "seeking query failed");
1702 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1704 /* try harder to query upstream size if we didn't get it the first time */
1705 if (seekable && stop == -1) {
1706 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1707 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1710 /* if upstream doesn't know the size, it's likely that it's not seekable in
1711 * practice even if it technically may be seekable */
1712 if (seekable && (start != 0 || stop <= start)) {
1713 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1717 /* let's not put every single frame into our index */
1719 if (stop < 10 * 1024 * 1024)
1721 else if (stop < 100 * 1024 * 1024)
1724 idx_interval = 1000;
1726 /* ensure that even for large files (e.g. very long audio files), the index
1727 * stays reasonably-size, with some arbitrary limit to the total number of
1729 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1730 GST_DEBUG_OBJECT (parse,
1731 "Limiting index entries to %d, indexing byte interval %"
1732 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1736 gst_query_unref (query);
1738 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1739 G_GUINT64_FORMAT ")", seekable, start, stop);
1740 parse->priv->upstream_seekable = seekable;
1741 parse->priv->upstream_size = seekable ? stop : 0;
1743 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1744 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1745 parse->priv->idx_byte_interval = idx_byte_interval;
1748 /* some misc checks on upstream */
1750 gst_base_parse_check_upstream (GstBaseParse * parse)
1754 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1755 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1756 /* upstream has one, accept it also, and no further updates */
1757 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1758 parse->priv->upstream_has_duration = TRUE;
1761 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1762 parse->priv->upstream_has_duration);
1765 /* checks src caps to determine if dealing with audio or video */
1766 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1768 gst_base_parse_check_media (GstBaseParse * parse)
1773 caps = gst_pad_get_current_caps (parse->srcpad);
1774 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1775 parse->priv->is_video =
1776 g_str_has_prefix (gst_structure_get_name (s), "video");
1778 /* historical default */
1779 parse->priv->is_video = FALSE;
1782 gst_caps_unref (caps);
1784 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1787 /* takes ownership of frame */
1789 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1791 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1792 /* frame allocated on the heap, we can just take ownership */
1793 g_queue_push_tail (&parse->priv->queued_frames, frame);
1794 GST_TRACE ("queued frame %p", frame);
1796 GstBaseParseFrame *copy;
1798 /* probably allocated on the stack, must make a proper copy */
1799 copy = gst_base_parse_frame_copy (frame);
1800 g_queue_push_tail (&parse->priv->queued_frames, copy);
1801 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1802 gst_base_parse_frame_free (frame);
1806 /* makes sure that @buf is properly prepared and decorated for passing
1807 * to baseclass, and an equally setup frame is returned setup with @buf.
1808 * Takes ownership of @buf. */
1809 static GstBaseParseFrame *
1810 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1812 GstBaseParseFrame *frame = NULL;
1814 buffer = gst_buffer_make_writable (buffer);
1816 GST_LOG_OBJECT (parse,
1817 "preparing frame at offset %" G_GUINT64_FORMAT
1818 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1819 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1820 gst_buffer_get_size (buffer));
1822 if (parse->priv->discont) {
1823 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1824 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1825 parse->priv->discont = FALSE;
1828 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1830 frame = gst_base_parse_frame_new (buffer, 0, 0);
1832 /* also ensure to update state flags */
1833 gst_base_parse_frame_update (parse, frame, buffer);
1834 gst_buffer_unref (buffer);
1836 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1837 GST_LOG_OBJECT (parse, "marking as new frame");
1838 parse->priv->new_frame = FALSE;
1839 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1842 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1844 /* use default handler to provide initial (upstream) metadata */
1845 gst_base_parse_parse_frame (parse, frame);
1850 /* Wraps buffer in a frame and dispatches to subclass.
1851 * Also manages data skipping and offset handling (including adapter flushing).
1852 * Takes ownership of @buffer */
1853 static GstFlowReturn
1854 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1855 gint * skip, gint * flushed)
1857 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1858 GstBaseParseFrame *frame;
1861 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1863 GST_LOG_OBJECT (parse,
1864 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1865 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1866 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1867 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1868 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1870 /* track what is being flushed during this single round of frame processing */
1871 parse->priv->flushed = 0;
1874 /* make it easy for _finish_frame to pick up input data */
1875 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1876 gst_buffer_ref (buffer);
1877 gst_adapter_push (parse->priv->adapter, buffer);
1880 frame = gst_base_parse_prepare_frame (parse, buffer);
1881 ret = klass->handle_frame (parse, frame, skip);
1883 *flushed = parse->priv->flushed;
1885 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1888 /* subclass can only do one of these, or semantics are too unclear */
1889 g_assert (*skip == 0 || *flushed == 0);
1891 /* track skipping */
1893 GstClockTime pts, dts;
1896 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1897 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1898 /* reverse playback, and no frames found yet, so we are skipping
1899 * the leading part of a fragment, which may form the tail of
1900 * fragment coming later, hopefully subclass skips efficiently ... */
1901 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1902 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1903 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1904 outbuf = gst_buffer_make_writable (outbuf);
1905 GST_BUFFER_PTS (outbuf) = pts;
1906 GST_BUFFER_DTS (outbuf) = dts;
1907 parse->priv->buffers_head =
1908 g_slist_prepend (parse->priv->buffers_head, outbuf);
1911 gst_adapter_flush (parse->priv->adapter, *skip);
1913 if (!parse->priv->discont)
1914 parse->priv->sync_offset = parse->priv->offset;
1915 parse->priv->offset += *skip;
1916 parse->priv->discont = TRUE;
1917 /* check for indefinite skipping */
1918 if (ret == GST_FLOW_OK)
1919 ret = gst_base_parse_check_sync (parse);
1922 parse->priv->offset += *flushed;
1924 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1925 gst_adapter_clear (parse->priv->adapter);
1928 gst_base_parse_frame_free (frame);
1933 /* gst_base_parse_handle_and_push_buffer:
1934 * @parse: #GstBaseParse.
1935 * @klass: #GstBaseParseClass.
1936 * @frame: (transfer full): a #GstBaseParseFrame
1938 * Parses the frame from given buffer and pushes it forward. Also performs
1939 * timestamp handling and checks the segment limits.
1941 * This is called with srcpad STREAM_LOCK held.
1943 * Returns: #GstFlowReturn
1945 static GstFlowReturn
1946 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1947 GstBaseParseFrame * frame)
1952 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1954 buffer = frame->buffer;
1955 offset = frame->offset;
1957 /* check if subclass/format can provide ts.
1958 * If so, that allows and enables extra seek and duration determining options */
1959 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1960 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
1961 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1962 parse->priv->first_frame_offset = offset;
1963 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
1964 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
1965 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
1966 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
1967 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
1968 GST_TIME_ARGS (parse->priv->first_frame_pts),
1969 parse->priv->first_frame_offset);
1970 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1972 GstClockTime last_ts = G_MAXINT64;
1974 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1975 gst_base_parse_locate_time (parse, &last_ts, &off);
1976 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1977 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1980 /* disable further checks */
1981 parse->priv->first_frame_offset = 0;
1985 /* interpolating and no valid pts yet,
1986 * start with dts and carry on from there */
1987 if (parse->priv->pts_interpolate &&
1988 !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
1989 parse->priv->next_pts = parse->priv->next_dts;
1991 /* again use default handler to add missing metadata;
1992 * we may have new information on frame properties */
1993 gst_base_parse_parse_frame (parse, frame);
1995 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1996 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
1997 parse->priv->next_dts =
1998 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
1999 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2000 GstClockTime next_pts =
2001 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2002 if (next_pts >= parse->priv->next_dts)
2003 parse->priv->next_pts = next_pts;
2006 /* we lost track, do not produce bogus time next time around
2007 * (probably means parser subclass has given up on parsing as well) */
2008 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2009 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2012 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2013 GST_BUFFER_PTS_IS_VALID (buffer))
2014 gst_base_parse_add_index_entry (parse, offset,
2015 GST_BUFFER_PTS (buffer),
2016 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2018 /* All OK, push queued frames if there are any */
2019 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2020 GstBaseParseFrame *queued_frame;
2022 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2023 gst_base_parse_push_frame (parse, queued_frame);
2027 return gst_base_parse_push_frame (parse, frame);
2031 * gst_base_parse_push_frame:
2032 * @parse: #GstBaseParse.
2033 * @frame: (transfer none): a #GstBaseParseFrame
2035 * Pushes the frame's buffer downstream, sends any pending events and
2036 * does some timestamp and segment handling. Takes ownership of
2037 * frame's buffer, though caller retains ownership of @frame.
2039 * This must be called with sinkpad STREAM_LOCK held.
2041 * Returns: #GstFlowReturn
2044 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2046 GstFlowReturn ret = GST_FLOW_OK;
2047 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2048 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2049 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2053 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2054 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2056 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2058 buffer = frame->buffer;
2060 GST_LOG_OBJECT (parse,
2061 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2062 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2063 gst_buffer_get_size (buffer),
2064 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2065 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2066 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2069 parse->priv->bytecount += frame->size;
2070 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2071 parse->priv->framecount++;
2072 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2073 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2076 /* 0 means disabled */
2077 if (parse->priv->update_interval < 0)
2078 parse->priv->update_interval = 50;
2079 else if (parse->priv->update_interval > 0 &&
2080 (parse->priv->framecount % parse->priv->update_interval) == 0)
2081 gst_base_parse_update_duration (parse);
2083 if (GST_BUFFER_PTS_IS_VALID (buffer))
2084 last_start = last_stop = GST_BUFFER_PTS (buffer);
2085 if (last_start != GST_CLOCK_TIME_NONE
2086 && GST_BUFFER_DURATION_IS_VALID (buffer))
2087 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2089 /* should have caps by now */
2090 if (!gst_pad_has_current_caps (parse->srcpad))
2093 if (G_UNLIKELY (parse->priv->pending_segment)) {
2094 /* have caps; check identity */
2095 gst_base_parse_check_media (parse);
2098 /* Push pending events, including SEGMENT events */
2099 if (G_UNLIKELY (parse->priv->pending_events)) {
2100 GList *r = g_list_reverse (parse->priv->pending_events);
2103 parse->priv->pending_events = NULL;
2104 for (l = r; l != NULL; l = l->next) {
2105 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2108 parse->priv->pending_segment = FALSE;
2111 /* segment adjustment magic; only if we are running the whole show */
2112 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2113 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2114 parse->priv->upstream_seekable)) {
2116 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2117 GST_CLOCK_TIME_IS_VALID (last_start)) {
2118 GstClockTimeDiff diff;
2120 /* only send newsegments with increasing start times,
2121 * otherwise if these go back and forth downstream (sinks) increase
2122 * accumulated time and running_time */
2123 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2124 if (G_UNLIKELY (diff > 2 * GST_SECOND
2125 && last_start > parse->segment.start
2126 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2127 || last_start < parse->segment.stop))) {
2129 GST_DEBUG_OBJECT (parse,
2130 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2131 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2132 "Sending updated SEGMENT events", diff,
2133 GST_TIME_ARGS (parse->segment.position),
2134 GST_TIME_ARGS (last_start));
2136 /* skip gap FIXME */
2137 gst_pad_push_event (parse->srcpad,
2138 gst_event_new_segment (&parse->segment));
2140 parse->segment.position = last_start;
2145 /* update bitrates and optionally post corresponding tags
2146 * (following newsegment) */
2147 gst_base_parse_update_bitrates (parse, frame);
2149 if (klass->pre_push_frame) {
2150 ret = klass->pre_push_frame (parse, frame);
2152 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2155 /* take final ownership of frame buffer */
2156 if (frame->out_buffer) {
2157 buffer = frame->out_buffer;
2158 frame->out_buffer = NULL;
2159 gst_buffer_replace (&frame->buffer, NULL);
2161 buffer = frame->buffer;
2162 frame->buffer = NULL;
2165 /* subclass must play nice */
2166 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2168 size = gst_buffer_get_size (buffer);
2170 parse->priv->seen_keyframe |= parse->priv->is_video &&
2171 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2173 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2174 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2175 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2176 GST_BUFFER_TIMESTAMP (buffer) >
2177 parse->segment.stop + parse->priv->lead_out_ts) {
2178 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2180 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2181 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2182 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2183 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2184 parse->priv->lead_in_ts < parse->segment.start) {
2185 if (parse->priv->seen_keyframe) {
2186 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2189 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2190 ret = GST_BASE_PARSE_FLOW_DROPPED;
2197 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2198 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2199 gst_buffer_unref (buffer);
2201 } else if (ret == GST_FLOW_OK) {
2202 if (parse->segment.rate > 0.0) {
2203 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2205 ret = gst_pad_push (parse->srcpad, buffer);
2206 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2208 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2210 parse->priv->buffers_queued =
2211 g_slist_prepend (parse->priv->buffers_queued, buffer);
2215 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2216 size, gst_flow_get_name (ret));
2217 gst_buffer_unref (buffer);
2218 /* if we are not sufficiently in control, let upstream decide on EOS */
2219 if (ret == GST_FLOW_EOS &&
2220 (parse->priv->passthrough ||
2221 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2222 !parse->priv->upstream_seekable)))
2226 /* Update current running segment position */
2227 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2228 parse->segment.position < last_stop)
2229 parse->segment.position = last_stop;
2236 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2237 return GST_FLOW_ERROR;
2242 * gst_base_parse_finish_frame:
2243 * @parse: a #GstBaseParse
2244 * @frame: a #GstBaseParseFrame
2245 * @size: consumed input data represented by frame
2247 * Collects parsed data and pushes this downstream.
2248 * Source pad caps must be set when this is called.
2250 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2251 * Otherwise, @size samples will be taken from the input and used for output,
2252 * and the output's metadata (timestamps etc) will be taken as (optionally)
2253 * set by the subclass on @frame's (input) buffer (which is otherwise
2254 * ignored for any but the above purpose/information).
2256 * Note that the latter buffer is invalidated by this call, whereas the
2257 * caller retains ownership of @frame.
2259 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2262 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2265 GstFlowReturn ret = GST_FLOW_OK;
2267 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2268 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2269 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2270 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2273 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2274 "flushing size %d", frame->offset, size);
2276 /* some one-time start-up */
2277 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2278 gst_base_parse_check_seekability (parse);
2279 gst_base_parse_check_upstream (parse);
2282 parse->priv->flushed += size;
2284 if (parse->priv->scanning && frame->buffer) {
2285 if (!parse->priv->scanned_frame) {
2286 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2291 /* either PUSH or PULL mode arranges for adapter data */
2292 /* ensure output buffer */
2293 if (!frame->out_buffer) {
2294 GstBuffer *src, *dest;
2296 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2297 dest = frame->out_buffer;
2298 src = frame->buffer;
2299 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2300 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2301 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2302 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2303 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2304 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2306 gst_adapter_flush (parse->priv->adapter, size);
2309 /* use as input for subsequent processing */
2310 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2311 gst_buffer_unref (frame->out_buffer);
2312 frame->out_buffer = NULL;
2314 /* mark input size consumed */
2317 /* subclass might queue frames/data internally if it needs more
2318 * frames to decide on the format, or might request us to queue here. */
2319 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2320 gst_buffer_replace (&frame->buffer, NULL);
2322 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2323 GstBaseParseFrame *copy;
2325 copy = gst_base_parse_frame_copy (frame);
2326 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2327 gst_base_parse_queue_frame (parse, copy);
2331 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2337 /* gst_base_parse_drain:
2339 * Drains the adapter until it is empty. It decreases the min_frame_size to
2340 * match the current adapter size and calls chain method until the adapter
2341 * is emptied or chain returns with error.
2344 gst_base_parse_drain (GstBaseParse * parse)
2348 GST_DEBUG_OBJECT (parse, "draining");
2349 parse->priv->drain = TRUE;
2352 avail = gst_adapter_available (parse->priv->adapter);
2356 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2357 NULL) != GST_FLOW_OK) {
2361 /* nothing changed, maybe due to truncated frame; break infinite loop */
2362 if (avail == gst_adapter_available (parse->priv->adapter)) {
2363 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2364 gst_adapter_clear (parse->priv->adapter);
2368 parse->priv->drain = FALSE;
2371 /* gst_base_parse_send_buffers
2373 * Sends buffers collected in send_buffers downstream, and ensures that list
2374 * is empty at the end (errors or not).
2376 static GstFlowReturn
2377 gst_base_parse_send_buffers (GstBaseParse * parse)
2379 GSList *send = NULL;
2381 GstFlowReturn ret = GST_FLOW_OK;
2383 send = parse->priv->buffers_send;
2387 buf = GST_BUFFER_CAST (send->data);
2388 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2389 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2390 ", offset %" G_GINT64_FORMAT, buf,
2391 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2392 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2393 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2395 /* iterate output queue an push downstream */
2396 ret = gst_pad_push (parse->srcpad, buf);
2397 send = g_slist_delete_link (send, send);
2399 /* clear any leftover if error */
2400 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2402 buf = GST_BUFFER_CAST (send->data);
2403 gst_buffer_unref (buf);
2404 send = g_slist_delete_link (send, send);
2409 parse->priv->buffers_send = send;
2414 /* gst_base_parse_start_fragment:
2416 * Prepares for processing a reverse playback (forward) fragment
2417 * by (re)setting proper state variables.
2419 static GstFlowReturn
2420 gst_base_parse_start_fragment (GstBaseParse * parse)
2422 GST_LOG_OBJECT (parse, "starting fragment");
2424 /* invalidate so no fall-back timestamping is performed;
2425 * ok if taken from subclass or upstream */
2426 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2427 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2428 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2429 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2430 /* prevent it hanging around stop all the time */
2431 parse->segment.position = GST_CLOCK_TIME_NONE;
2433 parse->priv->discont = TRUE;
2435 /* head of previous fragment is now pending tail of current fragment */
2436 parse->priv->buffers_pending = parse->priv->buffers_head;
2437 parse->priv->buffers_head = NULL;
2443 /* gst_base_parse_finish_fragment:
2445 * Processes a reverse playback (forward) fragment:
2446 * - append head of last fragment that was skipped to current fragment data
2447 * - drain the resulting current fragment data (i.e. repeated chain)
2448 * - add time/duration (if needed) to frames queued by chain
2449 * - push queued data
2451 static GstFlowReturn
2452 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2455 GstFlowReturn ret = GST_FLOW_OK;
2456 gboolean seen_key = FALSE, seen_delta = FALSE;
2458 GST_LOG_OBJECT (parse, "finishing fragment");
2461 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2462 while (parse->priv->buffers_pending) {
2463 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2465 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2466 gst_buffer_get_size (buf));
2467 gst_adapter_push (parse->priv->adapter, buf);
2469 GST_LOG_OBJECT (parse, "discarding head buffer");
2470 gst_buffer_unref (buf);
2472 parse->priv->buffers_pending =
2473 g_slist_delete_link (parse->priv->buffers_pending,
2474 parse->priv->buffers_pending);
2477 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2478 /* initial skipped data is added to buffers_pending */
2479 gst_base_parse_drain (parse);
2481 if (parse->priv->buffers_send) {
2482 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2483 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2486 /* add metadata (if needed to queued buffers */
2487 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2488 GST_TIME_ARGS (parse->priv->last_pts));
2489 while (parse->priv->buffers_queued) {
2490 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2492 /* no touching if upstream or parsing provided time */
2493 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2494 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2495 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2496 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2497 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2498 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2499 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2501 parse->priv->last_pts = 0;
2502 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2503 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2504 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2506 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2507 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2508 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2510 parse->priv->last_dts = 0;
2511 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2512 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2513 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2516 /* no idea, very bad */
2517 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2520 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2521 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2523 /* reverse order for ascending sending */
2524 /* send downstream at keyframe not preceded by a keyframe
2525 * (e.g. that should identify start of collection of IDR nals) */
2526 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2528 ret = gst_base_parse_send_buffers (parse);
2529 /* if a problem, throw all to sending */
2530 if (ret != GST_FLOW_OK) {
2531 parse->priv->buffers_send =
2532 g_slist_reverse (parse->priv->buffers_queued);
2533 parse->priv->buffers_queued = NULL;
2543 parse->priv->buffers_send =
2544 g_slist_prepend (parse->priv->buffers_send, buf);
2545 parse->priv->buffers_queued =
2546 g_slist_delete_link (parse->priv->buffers_queued,
2547 parse->priv->buffers_queued);
2550 /* audio may have all marked as keyframe, so arrange to send here */
2552 ret = gst_base_parse_send_buffers (parse);
2554 /* any trailing unused no longer usable (ideally none) */
2555 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2556 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2557 gst_adapter_available (parse->priv->adapter));
2558 gst_adapter_clear (parse->priv->adapter);
2564 /* small helper that checks whether we have been trying to resync too long */
2565 static inline GstFlowReturn
2566 gst_base_parse_check_sync (GstBaseParse * parse)
2568 if (G_UNLIKELY (parse->priv->discont &&
2569 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2570 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2571 ("Failed to parse stream"), (NULL));
2572 return GST_FLOW_ERROR;
2578 static GstFlowReturn
2579 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2581 GstBaseParseClass *bclass;
2582 GstBaseParse *parse;
2583 GstFlowReturn ret = GST_FLOW_OK;
2584 GstBuffer *tmpbuf = NULL;
2589 GstClockTime pts, dts;
2591 parse = GST_BASE_PARSE (parent);
2592 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2594 if (parse->priv->detecting) {
2595 GstBuffer *detect_buf;
2597 if (parse->priv->detect_buffers_size == 0) {
2598 detect_buf = gst_buffer_ref (buffer);
2603 detect_buf = gst_buffer_new ();
2605 for (l = parse->priv->detect_buffers; l; l = l->next) {
2606 gsize tmpsize = gst_buffer_get_size (l->data);
2608 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2609 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2613 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2614 offset, gst_buffer_get_size (buffer));
2617 ret = bclass->detect (parse, detect_buf);
2618 gst_buffer_unref (detect_buf);
2620 if (ret == GST_FLOW_OK) {
2623 /* Detected something */
2624 parse->priv->detecting = FALSE;
2626 for (l = parse->priv->detect_buffers; l; l = l->next) {
2627 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2629 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2630 parent, GST_BUFFER_CAST (l->data));
2632 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2634 g_list_free (parse->priv->detect_buffers);
2635 parse->priv->detect_buffers = NULL;
2636 parse->priv->detect_buffers_size = 0;
2638 if (ret != GST_FLOW_OK) {
2642 /* Handle the current buffer */
2643 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2644 /* Still detecting, append buffer or error out if draining */
2646 if (parse->priv->drain) {
2647 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2648 return GST_FLOW_ERROR;
2649 } else if (parse->priv->flushing) {
2650 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2652 g_list_free (parse->priv->detect_buffers);
2653 parse->priv->detect_buffers = NULL;
2654 parse->priv->detect_buffers_size = 0;
2656 parse->priv->detect_buffers =
2657 g_list_append (parse->priv->detect_buffers, buffer);
2658 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2662 /* Something went wrong, subclass responsible for error reporting */
2666 /* And now handle the current buffer if detection worked */
2669 if (G_LIKELY (buffer)) {
2670 GST_LOG_OBJECT (parse,
2671 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2672 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2673 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2674 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2675 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2677 if (G_UNLIKELY (parse->priv->passthrough)) {
2678 GstBaseParseFrame frame;
2680 gst_base_parse_frame_init (&frame);
2681 frame.buffer = gst_buffer_make_writable (buffer);
2682 ret = gst_base_parse_push_frame (parse, &frame);
2683 gst_base_parse_frame_free (&frame);
2686 /* upstream feeding us in reverse playback;
2687 * finish previous fragment and start new upon DISCONT */
2688 if (parse->segment.rate < 0.0) {
2689 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2690 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2691 ret = gst_base_parse_finish_fragment (parse, TRUE);
2692 gst_base_parse_start_fragment (parse);
2695 gst_adapter_push (parse->priv->adapter, buffer);
2698 /* Parse and push as many frames as possible */
2699 /* Stop either when adapter is empty or we are flushing */
2700 while (!parse->priv->flushing) {
2703 /* note: if subclass indicates MAX fsize,
2704 * this will not likely be available anyway ... */
2705 min_size = MAX (parse->priv->min_frame_size, fsize);
2706 av = gst_adapter_available (parse->priv->adapter);
2708 if (G_UNLIKELY (parse->priv->drain)) {
2710 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2711 if (G_UNLIKELY (!min_size)) {
2716 /* Collect at least min_frame_size bytes */
2717 if (av < min_size) {
2718 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2722 /* move along with upstream timestamp (if any),
2723 * but interpolate in between */
2724 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2725 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2726 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2727 parse->priv->prev_pts = parse->priv->next_pts = pts;
2729 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2730 parse->priv->prev_dts = parse->priv->next_dts = dts;
2732 /* always pass all available data */
2733 data = gst_adapter_map (parse->priv->adapter, av);
2734 /* arrange for actual data to be copied if subclass tries to,
2735 * since what is passed is tied to the adapter */
2736 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2737 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2739 /* keep the adapter mapped, so keep track of what has to be flushed */
2740 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2743 /* probably already implicitly unmapped due to adapter operation,
2744 * but for good measure ... */
2745 gst_adapter_unmap (parse->priv->adapter);
2746 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2749 if (skip == 0 && flush == 0) {
2750 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2751 "breaking to get more data");
2757 GST_LOG_OBJECT (parse, "chain leaving");
2761 /* pull @size bytes at current offset,
2762 * i.e. at least try to and possibly return a shorter buffer if near the end */
2763 static GstFlowReturn
2764 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2765 GstBuffer ** buffer)
2767 GstFlowReturn ret = GST_FLOW_OK;
2769 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2771 /* Caching here actually makes much less difference than one would expect.
2772 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2773 if (parse->priv->cache) {
2774 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2775 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2777 if (cache_offset <= parse->priv->offset &&
2778 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2779 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2780 parse->priv->offset - cache_offset, size);
2781 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2784 /* not enough data in the cache, free cache and get a new one */
2785 gst_buffer_unref (parse->priv->cache);
2786 parse->priv->cache = NULL;
2789 /* refill the cache */
2791 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2792 64 * 1024), &parse->priv->cache);
2793 if (ret != GST_FLOW_OK) {
2794 parse->priv->cache = NULL;
2798 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2800 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2802 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2806 /* Not possible to get enough data, try a last time with
2807 * requesting exactly the size we need */
2808 gst_buffer_unref (parse->priv->cache);
2809 parse->priv->cache = NULL;
2811 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2812 &parse->priv->cache);
2814 if (ret != GST_FLOW_OK) {
2815 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2820 if (gst_buffer_get_size (parse->priv->cache) < size) {
2821 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2822 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2823 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2825 *buffer = parse->priv->cache;
2826 parse->priv->cache = NULL;
2832 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2833 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2838 static GstFlowReturn
2839 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2842 GstClockTime ts = 0;
2846 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2847 ", last_offset = %" G_GINT64_FORMAT,
2848 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
2850 if (!parse->priv->last_offset
2851 || parse->priv->last_pts <= parse->segment.start) {
2852 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2853 GST_TIME_ARGS (parse->segment.start));
2858 /* last fragment started at last_offset / last_ts;
2859 * seek back 10s capped at 1MB */
2860 if (parse->priv->last_pts >= 10 * GST_SECOND)
2861 ts = parse->priv->last_pts - 10 * GST_SECOND;
2862 /* if we are exact now, we will be more so going backwards */
2863 if (parse->priv->exact_position) {
2864 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2866 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
2867 GST_FORMAT_BYTES, &offset)) {
2868 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2871 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2872 parse->priv->last_offset - 1024);
2873 offset = MAX (0, offset);
2875 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2877 parse->priv->offset = offset;
2879 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2881 if (ret != GST_FLOW_OK)
2884 /* offset will increase again as fragment is processed/parsed */
2885 parse->priv->last_offset = offset;
2887 gst_base_parse_start_fragment (parse);
2888 gst_adapter_push (parse->priv->adapter, buffer);
2889 ret = gst_base_parse_finish_fragment (parse, TRUE);
2890 if (ret != GST_FLOW_OK)
2893 /* force previous fragment */
2894 parse->priv->offset = -1;
2901 * pull and scan for next frame starting from current offset
2902 * ajusts sync, drain and offset going along */
2903 static GstFlowReturn
2904 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
2907 GstFlowReturn ret = GST_FLOW_OK;
2908 guint fsize, min_size;
2912 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2913 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2915 /* let's make this efficient for all subclass once and for all;
2916 * maybe it does not need this much, but in the latter case, we know we are
2917 * in pull mode here and might as well try to read and supply more anyway
2918 * (so does the buffer caching mechanism) */
2922 min_size = MAX (parse->priv->min_frame_size, fsize);
2924 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2926 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2927 if (ret != GST_FLOW_OK)
2930 /* if we got a short read, inform subclass we are draining leftover
2931 * and no more is to be expected */
2932 if (gst_buffer_get_size (buffer) < min_size) {
2933 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2934 parse->priv->drain = TRUE;
2937 if (parse->priv->detecting) {
2938 ret = klass->detect (parse, buffer);
2939 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2940 /* If draining we error out, otherwise request a buffer
2942 if (parse->priv->drain) {
2943 gst_buffer_unref (buffer);
2944 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2945 return GST_FLOW_ERROR;
2948 gst_buffer_unref (buffer);
2951 } else if (ret != GST_FLOW_OK) {
2952 gst_buffer_unref (buffer);
2953 GST_ERROR_OBJECT (parse, "detect() returned %s",
2954 gst_flow_get_name (ret));
2958 /* Else handle this buffer normally */
2961 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2962 if (ret != GST_FLOW_OK)
2965 /* something flushed means something happened,
2966 * and we should bail out of this loop so as not to occupy
2967 * the task thread indefinitely */
2969 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2972 /* nothing flushed, no skip and draining, so nothing left to do */
2973 if (!skip && parse->priv->drain) {
2974 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2975 "breaking loop and marking EOS");
2979 /* otherwise, get some more data
2980 * note that is checked this does not happen indefinitely */
2982 GST_LOG_OBJECT (parse, "getting some more data");
2985 parse->priv->drain = FALSE;
2992 /* Loop that is used in pull mode to retrieve data from upstream */
2994 gst_base_parse_loop (GstPad * pad)
2996 GstBaseParse *parse;
2997 GstBaseParseClass *klass;
2998 GstFlowReturn ret = GST_FLOW_OK;
3000 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3001 klass = GST_BASE_PARSE_GET_CLASS (parse);
3003 GST_LOG_OBJECT (parse, "Entering parse loop");
3005 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3009 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3012 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3013 gst_pad_push_event (parse->srcpad, gst_event_new_stream_start (stream_id));
3014 parse->priv->push_stream_start = FALSE;
3018 /* reverse playback:
3019 * first fragment (closest to stop time) is handled normally below,
3020 * then we pull in fragments going backwards */
3021 if (parse->segment.rate < 0.0) {
3022 /* check if we jumped back to a previous fragment,
3023 * which is a post-first fragment */
3024 if (parse->priv->offset < 0) {
3025 ret = gst_base_parse_handle_previous_fragment (parse);
3030 ret = gst_base_parse_scan_frame (parse, klass);
3031 if (ret != GST_FLOW_OK)
3034 /* eat expected eos signalling past segment in reverse playback */
3035 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3036 parse->segment.position >= parse->segment.stop) {
3037 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3038 /* push what was accumulated during loop run */
3039 gst_base_parse_finish_fragment (parse, FALSE);
3040 /* force previous fragment */
3041 parse->priv->offset = -1;
3046 if (ret == GST_FLOW_EOS)
3048 else if (ret != GST_FLOW_OK)
3051 gst_object_unref (parse);
3058 GST_DEBUG_OBJECT (parse, "eos");
3063 gboolean push_eos = FALSE;
3065 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3066 gst_flow_get_name (ret));
3067 gst_pad_pause_task (parse->sinkpad);
3069 if (ret == GST_FLOW_EOS) {
3070 /* handle end-of-stream/segment */
3071 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3074 if ((stop = parse->segment.stop) == -1)
3075 stop = parse->segment.duration;
3077 GST_DEBUG_OBJECT (parse, "sending segment_done");
3079 gst_element_post_message
3080 (GST_ELEMENT_CAST (parse),
3081 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3082 GST_FORMAT_TIME, stop));
3083 gst_pad_push_event (parse->srcpad,
3084 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3086 /* If we STILL have zero frames processed, fire an error */
3087 if (parse->priv->framecount == 0) {
3088 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3089 ("No valid frames found before end of stream"), (NULL));
3093 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3094 /* for fatal errors we post an error message, wrong-state is
3095 * not fatal because it happens due to flushes and only means
3096 * that we should stop now. */
3097 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3098 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3102 /* Push pending events, including SEGMENT events */
3103 if (G_UNLIKELY (parse->priv->pending_events)) {
3104 GList *r = g_list_reverse (parse->priv->pending_events);
3107 parse->priv->pending_events = NULL;
3108 for (l = r; l != NULL; l = l->next) {
3109 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
3112 parse->priv->pending_segment = FALSE;
3115 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3117 gst_object_unref (parse);
3122 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3124 GstSchedulingFlags sched_flags;
3125 GstBaseParse *parse;
3129 parse = GST_BASE_PARSE (parent);
3131 GST_DEBUG_OBJECT (parse, "sink activate");
3133 query = gst_query_new_scheduling ();
3134 if (!gst_pad_peer_query (sinkpad, query)) {
3135 gst_query_unref (query);
3136 goto baseparse_push;
3139 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3141 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3142 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3144 gst_query_unref (query);
3147 goto baseparse_push;
3149 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3150 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3151 goto baseparse_push;
3153 parse->priv->push_stream_start = TRUE;
3155 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3160 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3161 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3166 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3168 GstBaseParseClass *klass;
3169 gboolean result = TRUE;
3171 GST_DEBUG_OBJECT (parse, "activate %d", active);
3173 klass = GST_BASE_PARSE_GET_CLASS (parse);
3176 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3177 result = klass->start (parse);
3179 /* If the subclass implements ::detect we want to
3180 * call it for the first buffers now */
3181 parse->priv->detecting = (klass->detect != NULL);
3183 /* We must make sure streaming has finished before resetting things
3184 * and calling the ::stop vfunc */
3185 GST_PAD_STREAM_LOCK (parse->sinkpad);
3186 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3188 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3189 result = klass->stop (parse);
3191 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3193 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3198 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3199 GstPadMode mode, gboolean active)
3202 GstBaseParse *parse;
3204 parse = GST_BASE_PARSE (parent);
3206 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3207 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3209 if (!gst_base_parse_activate (parse, active))
3210 goto activate_failed;
3213 case GST_PAD_MODE_PULL:
3215 parse->priv->pending_events =
3216 g_list_prepend (parse->priv->pending_events,
3217 gst_event_new_segment (&parse->segment));
3218 parse->priv->pending_segment = TRUE;
3221 result = gst_pad_stop_task (pad);
3229 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3231 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3238 GST_DEBUG_OBJECT (parse, "activate failed");
3244 * gst_base_parse_set_duration:
3245 * @parse: #GstBaseParse.
3247 * @duration: duration value.
3248 * @interval: how often to update the duration estimate based on bitrate, or 0.
3250 * Sets the duration of the currently playing media. Subclass can use this
3251 * when it is able to determine duration and/or notices a change in the media
3252 * duration. Alternatively, if @interval is non-zero (default), then stream
3253 * duration is determined based on estimated bitrate, and updated every @interval
3257 gst_base_parse_set_duration (GstBaseParse * parse,
3258 GstFormat fmt, gint64 duration, gint interval)
3260 g_return_if_fail (parse != NULL);
3262 if (parse->priv->upstream_has_duration) {
3263 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3267 if (duration != parse->priv->duration) {
3270 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3271 gst_element_post_message (GST_ELEMENT (parse), m);
3273 /* TODO: what about duration tag? */
3275 parse->priv->duration = duration;
3276 parse->priv->duration_fmt = fmt;
3277 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3278 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3279 if (interval != 0) {
3280 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3284 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3285 parse->priv->update_interval = interval;
3291 * gst_base_parse_set_average_bitrate:
3292 * @parse: #GstBaseParse.
3293 * @bitrate: average bitrate in bits/second
3295 * Optionally sets the average bitrate detected in media (if non-zero),
3296 * e.g. based on metadata, as it will be posted to the application.
3298 * By default, announced average bitrate is estimated. The average bitrate
3299 * is used to estimate the total duration of the stream and to estimate
3300 * a seek position, if there's no index and the format is syncable
3301 * (see gst_base_parse_set_syncable()).
3304 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3306 parse->priv->bitrate = bitrate;
3307 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3311 * gst_base_parse_set_min_frame_size:
3312 * @parse: #GstBaseParse.
3313 * @min_size: Minimum size of the data that this base class should give to
3316 * Subclass can use this function to tell the base class that it needs to
3317 * give at least #min_size buffers.
3320 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3322 g_return_if_fail (parse != NULL);
3324 parse->priv->min_frame_size = min_size;
3325 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3329 * gst_base_parse_set_frame_rate:
3330 * @parse: the #GstBaseParse to set
3331 * @fps_num: frames per second (numerator).
3332 * @fps_den: frames per second (denominator).
3333 * @lead_in: frames needed before a segment for subsequent decode
3334 * @lead_out: frames needed after a segment
3336 * If frames per second is configured, parser can take care of buffer duration
3337 * and timestamping. When performing segment clipping, or seeking to a specific
3338 * location, a corresponding decoder might need an initial @lead_in and a
3339 * following @lead_out number of frames to ensure the desired segment is
3340 * entirely filled upon decoding.
3343 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3344 guint fps_den, guint lead_in, guint lead_out)
3346 g_return_if_fail (parse != NULL);
3348 parse->priv->fps_num = fps_num;
3349 parse->priv->fps_den = fps_den;
3350 if (!fps_num || !fps_den) {
3351 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3353 fps_num = fps_den = 0;
3354 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3355 parse->priv->lead_in = parse->priv->lead_out = 0;
3356 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3358 parse->priv->frame_duration =
3359 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3360 parse->priv->lead_in = lead_in;
3361 parse->priv->lead_out = lead_out;
3362 parse->priv->lead_in_ts =
3363 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3364 parse->priv->lead_out_ts =
3365 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3366 /* aim for about 1.5s to estimate duration */
3367 if (parse->priv->update_interval < 0) {
3368 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3369 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3370 parse->priv->update_interval);
3373 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3374 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3375 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3376 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3377 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3378 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3382 * gst_base_parse_set_has_timing_info:
3383 * @parse: a #GstBaseParse
3384 * @has_timing: whether frames carry timing information
3386 * Set if frames carry timing information which the subclass can (generally)
3387 * parse and provide. In particular, intrinsic (rather than estimated) time
3388 * can be obtained following a seek.
3391 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3393 parse->priv->has_timing_info = has_timing;
3394 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3398 * gst_base_parse_set_syncable:
3399 * @parse: a #GstBaseParse
3400 * @syncable: set if frame starts can be identified
3402 * Set if frame starts can be identified. This is set by default and
3403 * determines whether seeking based on bitrate averages
3404 * is possible for a format/stream.
3407 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3409 parse->priv->syncable = syncable;
3410 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3414 * gst_base_parse_set_passthrough:
3415 * @parse: a #GstBaseParse
3416 * @passthrough: %TRUE if parser should run in passthrough mode
3418 * Set if the nature of the format or configuration does not allow (much)
3419 * parsing, and the parser should operate in passthrough mode (which only
3420 * applies when operating in push mode). That is, incoming buffers are
3421 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3422 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3423 * so subclass can perform as much or as little is appropriate for
3424 * passthrough semantics in @pre_push_frame.
3427 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3429 parse->priv->passthrough = passthrough;
3430 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3434 * gst_base_parse_set_pts_interpolation:
3435 * @parse: a #GstBaseParse
3436 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3438 * By default, the base class will guess PTS timestamps using a simple
3439 * interpolation (previous timestamp + duration), which is incorrect for
3440 * data streams with reordering, where PTS can go backward. Sub-classes
3441 * implementing such formats should disable PTS interpolation.
3444 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3445 gboolean pts_interpolate)
3447 parse->priv->pts_interpolate = pts_interpolate;
3448 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3449 (pts_interpolate) ? "yes" : "no");
3453 * gst_base_parse_set_latency:
3454 * @parse: a #GstBaseParse
3455 * @min_latency: minimum parse latency
3456 * @max_latency: maximum parse latency
3458 * Sets the minimum and maximum (which may likely be equal) latency introduced
3459 * by the parsing process. If there is such a latency, which depends on the
3460 * particular parsing of the format, it typically corresponds to 1 frame duration.
3463 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3464 GstClockTime max_latency)
3466 GST_OBJECT_LOCK (parse);
3467 parse->priv->min_latency = min_latency;
3468 parse->priv->max_latency = max_latency;
3469 GST_OBJECT_UNLOCK (parse);
3470 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3471 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3472 GST_TIME_ARGS (max_latency));
3476 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3477 GstClockTime * duration)
3479 gboolean res = FALSE;
3481 g_return_val_if_fail (duration != NULL, FALSE);
3483 *duration = GST_CLOCK_TIME_NONE;
3484 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3485 GST_LOG_OBJECT (parse, "using provided duration");
3486 *duration = parse->priv->duration;
3488 } else if (parse->priv->duration != -1) {
3489 GST_LOG_OBJECT (parse, "converting provided duration");
3490 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3491 parse->priv->duration, format, (gint64 *) duration);
3492 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3493 GST_LOG_OBJECT (parse, "using estimated duration");
3494 *duration = parse->priv->estimated_duration;
3497 GST_LOG_OBJECT (parse, "cannot estimate duration");
3500 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3501 GST_TIME_ARGS (*duration));
3506 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3508 gboolean res = FALSE;
3511 pad = GST_BASE_PARSE_SRC_PAD (parse);
3513 switch (GST_QUERY_TYPE (query)) {
3514 case GST_QUERY_POSITION:
3519 GST_DEBUG_OBJECT (parse, "position query");
3520 gst_query_parse_position (query, &format, NULL);
3522 /* try upstream first */
3523 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3525 /* Fall back on interpreting segment */
3526 GST_OBJECT_LOCK (parse);
3527 if (format == GST_FORMAT_BYTES) {
3528 dest_value = parse->priv->offset;
3530 } else if (format == parse->segment.format &&
3531 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3532 dest_value = gst_segment_to_stream_time (&parse->segment,
3533 parse->segment.format, parse->segment.position);
3536 GST_OBJECT_UNLOCK (parse);
3538 /* no precise result, upstream no idea either, then best estimate */
3539 /* priv->offset is updated in both PUSH/PULL modes */
3540 res = gst_base_parse_convert (parse,
3541 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3544 gst_query_set_position (query, format, dest_value);
3548 case GST_QUERY_DURATION:
3551 GstClockTime duration;
3553 GST_DEBUG_OBJECT (parse, "duration query");
3554 gst_query_parse_duration (query, &format, NULL);
3556 /* consult upstream */
3557 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3559 /* otherwise best estimate from us */
3561 res = gst_base_parse_get_duration (parse, format, &duration);
3563 gst_query_set_duration (query, format, duration);
3567 case GST_QUERY_SEEKING:
3570 GstClockTime duration = GST_CLOCK_TIME_NONE;
3571 gboolean seekable = FALSE;
3573 GST_DEBUG_OBJECT (parse, "seeking query");
3574 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3576 /* consult upstream */
3577 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3579 /* we may be able to help if in TIME */
3580 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3581 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3582 /* already OK if upstream takes care */
3583 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3585 if (!(res && seekable)) {
3586 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3587 || duration == -1) {
3588 /* seekable if we still have a chance to get duration later on */
3590 parse->priv->upstream_seekable && parse->priv->update_interval;
3592 seekable = parse->priv->upstream_seekable;
3593 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3596 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3602 case GST_QUERY_FORMATS:
3603 gst_query_set_formatsv (query, 3, fmtlist);
3606 case GST_QUERY_CONVERT:
3608 GstFormat src_format, dest_format;
3609 gint64 src_value, dest_value;
3611 gst_query_parse_convert (query, &src_format, &src_value,
3612 &dest_format, &dest_value);
3614 res = gst_base_parse_convert (parse, src_format, src_value,
3615 dest_format, &dest_value);
3617 gst_query_set_convert (query, src_format, src_value,
3618 dest_format, dest_value);
3622 case GST_QUERY_LATENCY:
3624 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3626 GstClockTime min_latency, max_latency;
3628 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3629 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3630 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3631 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3633 GST_OBJECT_LOCK (parse);
3634 /* add our latency */
3635 if (min_latency != -1)
3636 min_latency += parse->priv->min_latency;
3637 if (max_latency != -1)
3638 max_latency += parse->priv->max_latency;
3639 GST_OBJECT_UNLOCK (parse);
3641 gst_query_set_latency (query, live, min_latency, max_latency);
3646 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3652 /* scans for a cluster start from @pos,
3653 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3654 static GstFlowReturn
3655 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3656 GstClockTime * time, GstClockTime * duration)
3658 GstBaseParseClass *klass;
3660 gboolean orig_drain, orig_discont;
3661 GstFlowReturn ret = GST_FLOW_OK;
3662 GstBuffer *buf = NULL;
3663 GstBaseParseFrame *sframe = NULL;
3665 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3666 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3667 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3669 klass = GST_BASE_PARSE_GET_CLASS (parse);
3671 *time = GST_CLOCK_TIME_NONE;
3672 *duration = GST_CLOCK_TIME_NONE;
3675 orig_offset = parse->priv->offset;
3676 orig_discont = parse->priv->discont;
3677 orig_drain = parse->priv->drain;
3679 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3680 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3682 /* jump elsewhere and locate next frame */
3683 parse->priv->offset = *pos;
3684 /* mark as scanning so frames don't get processed all the way */
3685 parse->priv->scanning = TRUE;
3686 ret = gst_base_parse_scan_frame (parse, klass);
3687 parse->priv->scanning = FALSE;
3688 /* retrieve frame found during scan */
3689 sframe = parse->priv->scanned_frame;
3690 parse->priv->scanned_frame = NULL;
3692 if (ret != GST_FLOW_OK || !sframe)
3695 /* get offset first, subclass parsing might dump other stuff in there */
3696 *pos = sframe->offset;
3697 buf = sframe->buffer;
3700 /* but it should provide proper time */
3701 *time = GST_BUFFER_TIMESTAMP (buf);
3702 *duration = GST_BUFFER_DURATION (buf);
3704 GST_LOG_OBJECT (parse,
3705 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3706 GST_TIME_ARGS (*time), *pos);
3710 gst_base_parse_frame_free (sframe);
3713 parse->priv->offset = orig_offset;
3714 parse->priv->discont = orig_discont;
3715 parse->priv->drain = orig_drain;
3720 /* bisect and scan through file for frame starting before @time,
3721 * returns OK and @time/@offset if found, NONE and/or error otherwise
3722 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3723 static GstFlowReturn
3724 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3727 GstFlowReturn ret = GST_FLOW_OK;
3728 gint64 lpos, hpos, newpos;
3729 GstClockTime time, ltime, htime, newtime, dur;
3730 gboolean cont = TRUE;
3731 const GstClockTime tolerance = TARGET_DIFFERENCE;
3732 const guint chunk = 4 * 1024;
3734 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3735 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3737 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3738 GST_TIME_ARGS (*_time));
3740 /* TODO also make keyframe aware if useful some day */
3755 /* do not know at first */
3757 *_time = GST_CLOCK_TIME_NONE;
3759 /* need initial positions; start and end */
3760 lpos = parse->priv->first_frame_offset;
3761 ltime = parse->priv->first_frame_pts;
3762 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3763 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3764 return GST_FLOW_ERROR;
3766 hpos = parse->priv->upstream_size;
3768 GST_DEBUG_OBJECT (parse,
3769 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3770 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3771 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3773 /* check preconditions are satisfied;
3774 * start and end are needed, except for special case where we scan for
3775 * last frame to determine duration */
3776 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3777 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3778 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3782 /* shortcut cases */
3785 } else if (time < ltime + tolerance) {
3789 } else if (time >= htime) {
3795 while (htime > ltime && cont) {
3796 GST_LOG_OBJECT (parse,
3797 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3798 GST_TIME_ARGS (ltime));
3799 GST_LOG_OBJECT (parse,
3800 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3801 GST_TIME_ARGS (htime));
3802 if (G_UNLIKELY (time == G_MAXINT64)) {
3804 } else if (G_LIKELY (hpos > lpos)) {
3806 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3809 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3811 /* we check this case once, but not forever, so break loop */
3816 newpos = CLAMP (newpos, lpos, hpos);
3817 GST_LOG_OBJECT (parse,
3818 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3819 GST_TIME_ARGS (time), newpos);
3821 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3822 if (ret == GST_FLOW_EOS) {
3823 /* heuristic HACK */
3824 hpos = MAX (lpos, hpos - chunk);
3826 } else if (ret != GST_FLOW_OK) {
3830 if (newtime == -1 || newpos == -1) {
3831 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3835 if (G_UNLIKELY (time == G_MAXINT64)) {
3838 if (GST_CLOCK_TIME_IS_VALID (dur))
3841 } else if (newtime > time) {
3843 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3845 } else if (newtime + tolerance > time) {
3846 /* close enough undershoot */
3850 } else if (newtime < ltime) {
3851 /* so a position beyond lpos resulted in earlier time than ltime ... */
3852 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3855 /* undershoot too far */
3856 newpos += newpos == lpos ? chunk : 0;
3857 lpos = CLAMP (newpos, lpos, hpos);
3863 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3864 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3869 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3870 gboolean before, GstClockTime * _ts)
3872 gint64 bytes = 0, ts = 0;
3873 GstIndexEntry *entry = NULL;
3875 if (time == GST_CLOCK_TIME_NONE) {
3881 GST_BASE_PARSE_INDEX_LOCK (parse);
3882 if (parse->priv->index) {
3883 /* Let's check if we have an index entry for that time */
3884 entry = gst_index_get_assoc_entry (parse->priv->index,
3885 parse->priv->index_id,
3886 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3887 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3891 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3892 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3894 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3895 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3896 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3898 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3899 GST_TIME_ARGS (time));
3902 ts = GST_CLOCK_TIME_NONE;
3905 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3914 /* returns TRUE if seek succeeded */
3916 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3921 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
3922 gboolean flush, update, res = TRUE, accurate;
3923 gint64 start, stop, seekpos, seekstop;
3924 GstSegment seeksegment = { 0, };
3925 GstClockTime start_ts;
3927 /* try upstream first, unless we're driving the streaming thread ourselves */
3928 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
3929 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
3934 gst_event_parse_seek (event, &rate, &format, &flags,
3935 &start_type, &start, &stop_type, &stop);
3937 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3938 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3939 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3940 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
3942 /* we can only handle TIME, so check if subclass can convert
3943 * to TIME format if it's some other format (such as DEFAULT) */
3944 if (format != GST_FORMAT_TIME) {
3945 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
3946 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
3948 goto no_convert_to_time;
3950 GST_INFO_OBJECT (parse, "converted %s format to start time "
3951 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
3952 gst_format_get_name (format), GST_TIME_ARGS (start),
3953 GST_TIME_ARGS (stop));
3955 format = GST_FORMAT_TIME;
3958 /* no negative rates in push mode (unless upstream takes care of that, but
3959 * we've already tried upstream and it didn't handle the seek request) */
3960 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3963 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
3964 goto negative_rate_pull_mode;
3966 if (start_type != GST_SEEK_TYPE_SET ||
3967 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3970 /* get flush flag */
3971 flush = flags & GST_SEEK_FLAG_FLUSH;
3973 /* copy segment, we need this because we still need the old
3974 * segment when we close the current segment. */
3975 gst_segment_copy_into (&parse->segment, &seeksegment);
3977 GST_DEBUG_OBJECT (parse, "configuring seek");
3978 gst_segment_do_seek (&seeksegment, rate, format, flags,
3979 start_type, start, stop_type, stop, &update);
3981 /* accurate seeking implies seek tables are used to obtain position,
3982 * and the requested segment is maintained exactly, not adjusted any way */
3983 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3985 /* maybe we can be accurate for (almost) free */
3986 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3987 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3988 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3992 GstClockTime startpos = seeksegment.position;
3994 /* accurate requested, so ... seek a bit before target */
3995 if (startpos < parse->priv->lead_in_ts)
3998 startpos -= parse->priv->lead_in_ts;
3999 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4000 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4003 start_ts = seeksegment.position;
4004 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4005 GST_FORMAT_BYTES, &seekpos))
4006 goto convert_failed;
4007 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4008 GST_FORMAT_BYTES, &seekstop))
4009 goto convert_failed;
4012 GST_DEBUG_OBJECT (parse,
4013 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4015 GST_DEBUG_OBJECT (parse,
4016 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4017 seeksegment.stop, seekstop);
4019 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4022 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4025 if (parse->srcpad) {
4026 GST_DEBUG_OBJECT (parse, "sending flush start");
4027 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
4028 /* unlock upstream pull_range */
4029 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
4032 gst_pad_pause_task (parse->sinkpad);
4035 /* we should now be able to grab the streaming thread because we stopped it
4036 * with the above flush/pause code */
4037 GST_PAD_STREAM_LOCK (parse->sinkpad);
4039 /* save current position */
4040 last_stop = parse->segment.position;
4041 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4044 /* now commit to new position */
4046 /* prepare for streaming again */
4048 GST_DEBUG_OBJECT (parse, "sending flush stop");
4049 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
4050 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
4051 gst_base_parse_clear_queues (parse);
4053 /* keep track of our position */
4054 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4055 seeksegment.format, parse->segment.position);
4058 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4060 /* store the newsegment event so it can be sent from the streaming thread. */
4061 /* This will be sent later in _loop() */
4062 parse->priv->pending_segment = TRUE;
4063 parse->priv->pending_events =
4064 g_list_prepend (parse->priv->pending_events,
4065 gst_event_new_segment (&parse->segment));
4067 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4068 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4069 ", time = %" GST_TIME_FORMAT, format,
4070 GST_TIME_ARGS (parse->segment.start),
4071 GST_TIME_ARGS (parse->segment.stop),
4072 GST_TIME_ARGS (parse->segment.time));
4074 /* one last chance in pull mode to stay accurate;
4075 * maybe scan and subclass can find where to go */
4078 GstClockTime ts = seeksegment.position;
4080 gst_base_parse_locate_time (parse, &ts, &scanpos);
4084 /* running collected index now consists of several intervals,
4085 * so optimized check no longer possible */
4086 parse->priv->index_last_valid = FALSE;
4087 parse->priv->index_last_offset = 0;
4088 parse->priv->index_last_ts = 0;
4092 /* mark discont if we are going to stream from another position. */
4093 if (seekpos != parse->priv->offset) {
4094 GST_DEBUG_OBJECT (parse,
4095 "mark DISCONT, we did a seek to another position");
4096 parse->priv->offset = seekpos;
4097 parse->priv->last_offset = seekpos;
4098 parse->priv->seen_keyframe = FALSE;
4099 parse->priv->discont = TRUE;
4100 parse->priv->next_dts = start_ts;
4101 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4102 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4103 parse->priv->sync_offset = seekpos;
4104 parse->priv->exact_position = accurate;
4107 /* Start streaming thread if paused */
4108 gst_pad_start_task (parse->sinkpad,
4109 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4111 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4116 GstEvent *new_event;
4117 GstBaseParseSeek *seek;
4118 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4120 /* The only thing we need to do in PUSH-mode is to send the
4121 seek event (in bytes) to upstream. Segment / flush handling happens
4122 in corresponding src event handlers */
4123 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4124 if (seekstop >= 0 && seekstop <= seekpos)
4126 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4127 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4129 /* store segment info so its precise details can be reconstructed when
4130 * receiving newsegment;
4131 * this matters for all details when accurate seeking,
4132 * is most useful to preserve NONE stop time otherwise */
4133 seek = g_new0 (GstBaseParseSeek, 1);
4134 seek->segment = seeksegment;
4135 seek->accurate = accurate;
4136 seek->offset = seekpos;
4137 seek->start_ts = start_ts;
4138 GST_OBJECT_LOCK (parse);
4139 /* less optimal, but preserves order */
4140 parse->priv->pending_seeks =
4141 g_slist_append (parse->priv->pending_seeks, seek);
4142 GST_OBJECT_UNLOCK (parse);
4144 res = gst_pad_push_event (parse->sinkpad, new_event);
4147 GST_OBJECT_LOCK (parse);
4148 parse->priv->pending_seeks =
4149 g_slist_remove (parse->priv->pending_seeks, seek);
4150 GST_OBJECT_UNLOCK (parse);
4156 gst_event_unref (event);
4160 negative_rate_pull_mode:
4162 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4168 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4174 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4180 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4181 "couldn't convert that into TIME format", gst_format_get_name (format));
4187 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4193 /* Checks if bitrates are available from upstream tags so that we don't
4194 * override them later
4197 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4199 GstTagList *taglist = NULL;
4202 gst_event_parse_tag (event, &taglist);
4204 /* We only care about stream tags here */
4205 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4208 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4209 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4210 parse->priv->post_min_bitrate = FALSE;
4212 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4213 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4214 parse->priv->post_avg_bitrate = FALSE;
4216 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4217 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4218 parse->priv->post_max_bitrate = FALSE;
4224 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4226 GstBaseParse *parse = GST_BASE_PARSE (element);
4228 GST_BASE_PARSE_INDEX_LOCK (parse);
4229 if (parse->priv->index)
4230 gst_object_unref (parse->priv->index);
4232 parse->priv->index = gst_object_ref (index);
4233 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4234 &parse->priv->index_id);
4235 parse->priv->own_index = FALSE;
4237 parse->priv->index = NULL;
4239 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4243 gst_base_parse_get_index (GstElement * element)
4245 GstBaseParse *parse = GST_BASE_PARSE (element);
4246 GstIndex *result = NULL;
4248 GST_BASE_PARSE_INDEX_LOCK (parse);
4249 if (parse->priv->index)
4250 result = gst_object_ref (parse->priv->index);
4251 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4257 static GstStateChangeReturn
4258 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4260 GstBaseParse *parse;
4261 GstStateChangeReturn result;
4263 parse = GST_BASE_PARSE (element);
4265 switch (transition) {
4266 case GST_STATE_CHANGE_READY_TO_PAUSED:
4267 /* If this is our own index destroy it as the
4268 * old entries might be wrong for the new stream */
4269 GST_BASE_PARSE_INDEX_LOCK (parse);
4270 if (parse->priv->own_index) {
4271 gst_object_unref (parse->priv->index);
4272 parse->priv->index = NULL;
4273 parse->priv->own_index = FALSE;
4276 /* If no index was created, generate one */
4277 if (G_UNLIKELY (!parse->priv->index)) {
4278 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4280 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4281 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4282 &parse->priv->index_id);
4283 parse->priv->own_index = TRUE;
4285 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4291 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4293 switch (transition) {
4294 case GST_STATE_CHANGE_PAUSED_TO_READY:
4295 gst_base_parse_reset (parse);