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_size() could also be used if a very
92 * 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 = 0;
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 if (parse->priv->pts_interpolate)
1038 parse->priv->next_pts = next_dts;
1039 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1040 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1041 parse->priv->discont = TRUE;
1042 parse->priv->seen_keyframe = FALSE;
1046 case GST_EVENT_FLUSH_START:
1047 GST_OBJECT_LOCK (parse);
1048 parse->priv->flushing = TRUE;
1049 GST_OBJECT_UNLOCK (parse);
1052 case GST_EVENT_FLUSH_STOP:
1053 gst_adapter_clear (parse->priv->adapter);
1054 gst_base_parse_clear_queues (parse);
1055 parse->priv->flushing = FALSE;
1056 parse->priv->discont = TRUE;
1057 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1058 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1059 parse->priv->new_frame = TRUE;
1061 forward_immediate = TRUE;
1065 if (parse->segment.rate > 0.0)
1066 gst_base_parse_drain (parse);
1068 gst_base_parse_finish_fragment (parse, TRUE);
1070 /* If we STILL have zero frames processed, fire an error */
1071 if (parse->priv->framecount == 0) {
1072 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1073 ("No valid frames found before end of stream"), (NULL));
1075 /* newsegment and other serialized events before eos */
1076 if (G_UNLIKELY (parse->priv->pending_events)) {
1079 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1080 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1082 g_list_free (parse->priv->pending_events);
1083 parse->priv->pending_events = NULL;
1084 parse->priv->pending_segment = FALSE;
1086 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1087 /* We've not posted bitrate tags yet - do so now */
1088 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1090 forward_immediate = TRUE;
1092 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1093 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1094 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1095 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1098 const GstStructure *s;
1099 gboolean ev_still_state;
1101 s = gst_event_get_structure (event);
1103 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1104 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1105 if (ev_still_state) {
1106 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1107 if (parse->segment.rate > 0.0)
1108 gst_base_parse_drain (parse);
1110 gst_base_parse_finish_fragment (parse, TRUE);
1112 forward_immediate = TRUE;
1118 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1119 if (parse->segment.rate > 0.0)
1120 gst_base_parse_drain (parse);
1122 gst_base_parse_finish_fragment (parse, TRUE);
1123 forward_immediate = TRUE;
1127 /* See if any bitrate tags were posted */
1128 gst_base_parse_handle_tag (parse, event);
1131 case GST_EVENT_STREAM_START:
1132 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1133 forward_immediate = TRUE;
1140 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1141 * For EOS this is required because no buffer or serialized event
1142 * will come after EOS and nothing could trigger another
1143 * _finish_frame() call. *
1144 * If the subclass handles sending of EOS manually it can return
1145 * _DROPPED from ::finish() and all other subclasses should have
1146 * decoded/flushed all remaining data before this
1148 * For FLUSH_STOP this is required because it is expected
1149 * to be forwarded immediately and no buffers are queued anyway.
1152 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1153 ret = gst_pad_push_event (parse->srcpad, event);
1155 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1156 parse->priv->pending_events =
1157 g_list_prepend (parse->priv->pending_events, event);
1158 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1163 GST_DEBUG_OBJECT (parse, "event handled");
1169 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1174 pad = GST_BASE_PARSE_SINK_PAD (parse);
1176 switch (GST_QUERY_TYPE (query)) {
1177 case GST_QUERY_CAPS:
1179 GstBaseParseClass *bclass;
1181 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1183 if (bclass->get_sink_caps) {
1184 GstCaps *caps, *filter;
1186 gst_query_parse_caps (query, &filter);
1187 caps = bclass->get_sink_caps (parse, filter);
1188 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1190 gst_query_set_caps_result (query, caps);
1191 gst_caps_unref (caps);
1195 GstCaps *caps, *template_caps, *filter;
1197 gst_query_parse_caps (query, &filter);
1198 template_caps = gst_pad_get_pad_template_caps (pad);
1199 if (filter != NULL) {
1201 gst_caps_intersect_full (filter, template_caps,
1202 GST_CAPS_INTERSECT_FIRST);
1203 gst_caps_unref (template_caps);
1205 caps = template_caps;
1207 gst_query_set_caps_result (query, caps);
1208 gst_caps_unref (caps);
1216 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1225 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1227 GstBaseParseClass *bclass;
1228 GstBaseParse *parse;
1231 parse = GST_BASE_PARSE (parent);
1232 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1234 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1236 if (bclass->sink_query)
1237 ret = bclass->sink_query (parse, query);
1241 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1242 GST_QUERY_TYPE_NAME (query), ret, query);
1248 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1250 GstBaseParseClass *bclass;
1251 GstBaseParse *parse;
1254 parse = GST_BASE_PARSE (parent);
1255 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1257 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1258 GST_QUERY_TYPE_NAME (query), query);
1260 if (bclass->src_query)
1261 ret = bclass->src_query (parse, query);
1265 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1266 GST_QUERY_TYPE_NAME (query), ret, query);
1271 /* gst_base_parse_src_event:
1272 * @pad: #GstPad that received the event.
1273 * @event: #GstEvent that was received.
1275 * Handler for source pad events.
1277 * Returns: TRUE if the event was handled.
1280 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1282 GstBaseParse *parse;
1283 GstBaseParseClass *bclass;
1284 gboolean ret = TRUE;
1286 parse = GST_BASE_PARSE (parent);
1287 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1289 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1290 GST_EVENT_TYPE_NAME (event));
1292 if (bclass->src_event)
1293 ret = bclass->src_event (parse, event);
1295 gst_event_unref (event);
1301 gst_base_parse_is_seekable (GstBaseParse * parse)
1303 /* FIXME: could do more here, e.g. check index or just send data from 0
1304 * in pull mode and let decoder/sink clip */
1305 return parse->priv->syncable;
1308 /* gst_base_parse_src_event_default:
1309 * @parse: #GstBaseParse.
1310 * @event: #GstEvent that was received.
1312 * Default srcpad event handler.
1314 * Returns: TRUE if the event was handled and can be dropped.
1317 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1319 gboolean res = FALSE;
1321 switch (GST_EVENT_TYPE (event)) {
1322 case GST_EVENT_SEEK:
1323 if (gst_base_parse_is_seekable (parse))
1324 res = gst_base_parse_handle_seek (parse, event);
1327 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1336 * gst_base_parse_convert_default:
1337 * @parse: #GstBaseParse.
1338 * @src_format: #GstFormat describing the source format.
1339 * @src_value: Source value to be converted.
1340 * @dest_format: #GstFormat defining the converted format.
1341 * @dest_value: Pointer where the conversion result will be put.
1343 * Default implementation of "convert" vmethod in #GstBaseParse class.
1345 * Returns: TRUE if conversion was successful.
1348 gst_base_parse_convert_default (GstBaseParse * parse,
1349 GstFormat src_format,
1350 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1352 gboolean ret = FALSE;
1353 guint64 bytes, duration;
1355 if (G_UNLIKELY (src_format == dest_format)) {
1356 *dest_value = src_value;
1360 if (G_UNLIKELY (src_value == -1)) {
1365 if (G_UNLIKELY (src_value == 0)) {
1370 /* need at least some frames */
1371 if (!parse->priv->framecount)
1374 duration = parse->priv->acc_duration / GST_MSECOND;
1375 bytes = parse->priv->bytecount;
1377 if (G_UNLIKELY (!duration || !bytes))
1378 goto no_duration_bytes;
1380 if (src_format == GST_FORMAT_BYTES) {
1381 if (dest_format == GST_FORMAT_TIME) {
1382 /* BYTES -> TIME conversion */
1383 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1384 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1385 *dest_value *= GST_MSECOND;
1386 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1387 *dest_value / GST_MSECOND);
1390 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1392 } else if (src_format == GST_FORMAT_TIME) {
1393 if (dest_format == GST_FORMAT_BYTES) {
1394 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1395 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1397 GST_DEBUG_OBJECT (parse,
1398 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1399 src_value / GST_MSECOND, *dest_value);
1402 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1404 } else if (src_format == GST_FORMAT_DEFAULT) {
1405 /* DEFAULT == frame-based */
1406 if (dest_format == GST_FORMAT_TIME) {
1407 GST_DEBUG_OBJECT (parse, "converting default -> time");
1408 if (parse->priv->fps_den) {
1409 *dest_value = gst_util_uint64_scale (src_value,
1410 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1414 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1417 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1424 GST_DEBUG_OBJECT (parse, "no framecount");
1429 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1430 G_GUINT64_FORMAT, duration, bytes);
1437 gst_base_parse_update_duration (GstBaseParse * baseparse)
1440 GstBaseParse *parse;
1442 parse = GST_BASE_PARSE (baseparse);
1444 peer = gst_pad_get_peer (parse->sinkpad);
1446 gboolean qres = FALSE;
1447 gint64 ptot, dest_value;
1449 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1450 gst_object_unref (GST_OBJECT (peer));
1452 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1453 GST_FORMAT_TIME, &dest_value)) {
1455 /* inform if duration changed, but try to avoid spamming */
1456 parse->priv->estimated_drift +=
1457 dest_value - parse->priv->estimated_duration;
1458 if (parse->priv->estimated_drift > GST_SECOND ||
1459 parse->priv->estimated_drift < -GST_SECOND) {
1460 gst_element_post_message (GST_ELEMENT (parse),
1461 gst_message_new_duration_changed (GST_OBJECT (parse)));
1462 parse->priv->estimated_drift = 0;
1464 parse->priv->estimated_duration = dest_value;
1465 GST_LOG_OBJECT (parse,
1466 "updated estimated duration to %" GST_TIME_FORMAT,
1467 GST_TIME_ARGS (dest_value));
1474 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1475 gboolean post_avg, gboolean post_max)
1477 GstTagList *taglist = NULL;
1479 if (post_min && parse->priv->post_min_bitrate) {
1480 taglist = gst_tag_list_new_empty ();
1482 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1483 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1486 if (post_avg && parse->priv->post_avg_bitrate) {
1487 if (taglist == NULL)
1488 taglist = gst_tag_list_new_empty ();
1490 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1491 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1492 parse->priv->avg_bitrate, NULL);
1495 if (post_max && parse->priv->post_max_bitrate) {
1496 if (taglist == NULL)
1497 taglist = gst_tag_list_new_empty ();
1499 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1500 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1503 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1504 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1505 parse->priv->max_bitrate);
1507 if (taglist != NULL) {
1508 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1512 /* gst_base_parse_update_bitrates:
1513 * @parse: #GstBaseParse.
1514 * @buffer: Current frame as a #GstBuffer
1516 * Keeps track of the minimum and maximum bitrates, and also maintains a
1517 * running average bitrate of the stream so far.
1520 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1522 /* Only update the tag on a 10 kbps delta */
1523 static const gint update_threshold = 10000;
1525 guint64 data_len, frame_dur;
1526 gint overhead, frame_bitrate, old_avg_bitrate;
1527 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1528 GstBuffer *buffer = frame->buffer;
1530 overhead = frame->overhead;
1534 data_len = gst_buffer_get_size (buffer) - overhead;
1535 parse->priv->data_bytecount += data_len;
1537 /* duration should be valid by now,
1538 * either set by subclass or maybe based on fps settings */
1539 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1540 /* Calculate duration of a frame from buffer properties */
1541 frame_dur = GST_BUFFER_DURATION (buffer);
1542 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1543 parse->priv->acc_duration;
1546 /* No way to figure out frame duration (is this even possible?) */
1550 /* override if subclass provided bitrate, e.g. metadata based */
1551 if (parse->priv->bitrate) {
1552 parse->priv->avg_bitrate = parse->priv->bitrate;
1553 /* spread this (confirmed) info ASAP */
1554 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1555 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1559 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1563 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1564 parse->priv->avg_bitrate);
1566 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1568 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1569 /* always post all at threshold time */
1570 update_min = update_max = update_avg = TRUE;
1573 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1574 if (frame_bitrate < parse->priv->min_bitrate) {
1575 parse->priv->min_bitrate = frame_bitrate;
1579 if (frame_bitrate > parse->priv->max_bitrate) {
1580 parse->priv->max_bitrate = frame_bitrate;
1584 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1585 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1586 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1591 if ((update_min || update_avg || update_max))
1592 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1599 * gst_base_parse_add_index_entry:
1600 * @parse: #GstBaseParse.
1601 * @offset: offset of entry
1602 * @ts: timestamp associated with offset
1603 * @key: whether entry refers to keyframe
1604 * @force: add entry disregarding sanity checks
1606 * Adds an entry to the index associating @offset to @ts. It is recommended
1607 * to only add keyframe entries. @force allows to bypass checks, such as
1608 * whether the stream is (upstream) seekable, another entry is already "close"
1609 * to the new entry, etc.
1611 * Returns: #gboolean indicating whether entry was added
1614 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1615 GstClockTime ts, gboolean key, gboolean force)
1617 gboolean ret = FALSE;
1618 GstIndexAssociation associations[2];
1620 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1621 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1623 if (G_LIKELY (!force)) {
1625 if (!parse->priv->upstream_seekable) {
1626 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1630 /* FIXME need better helper data structure that handles these issues
1631 * related to ongoing collecting of index entries */
1632 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1634 GST_LOG_OBJECT (parse,
1635 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1636 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1640 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1641 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1642 parse->priv->idx_interval) {
1643 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1644 GST_TIME_ARGS (parse->priv->index_last_ts));
1648 /* if last is not really the last one */
1649 if (!parse->priv->index_last_valid) {
1650 GstClockTime prev_ts;
1652 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1653 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1654 GST_LOG_OBJECT (parse,
1655 "entry too close to existing entry %" GST_TIME_FORMAT,
1656 GST_TIME_ARGS (prev_ts));
1657 parse->priv->index_last_offset = offset;
1658 parse->priv->index_last_ts = ts;
1664 associations[0].format = GST_FORMAT_TIME;
1665 associations[0].value = ts;
1666 associations[1].format = GST_FORMAT_BYTES;
1667 associations[1].value = offset;
1669 /* index might change on-the-fly, although that would be nutty app ... */
1670 GST_BASE_PARSE_INDEX_LOCK (parse);
1671 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1672 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1673 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1674 (const GstIndexAssociation *) &associations);
1675 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1678 parse->priv->index_last_offset = offset;
1679 parse->priv->index_last_ts = ts;
1688 /* check for seekable upstream, above and beyond a mere query */
1690 gst_base_parse_check_seekability (GstBaseParse * parse)
1693 gboolean seekable = FALSE;
1694 gint64 start = -1, stop = -1;
1695 guint idx_interval = 0;
1696 guint64 idx_byte_interval = 0;
1698 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1699 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1700 GST_DEBUG_OBJECT (parse, "seeking query failed");
1704 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1706 /* try harder to query upstream size if we didn't get it the first time */
1707 if (seekable && stop == -1) {
1708 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1709 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1712 /* if upstream doesn't know the size, it's likely that it's not seekable in
1713 * practice even if it technically may be seekable */
1714 if (seekable && (start != 0 || stop <= start)) {
1715 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1719 /* let's not put every single frame into our index */
1721 if (stop < 10 * 1024 * 1024)
1723 else if (stop < 100 * 1024 * 1024)
1726 idx_interval = 1000;
1728 /* ensure that even for large files (e.g. very long audio files), the index
1729 * stays reasonably-size, with some arbitrary limit to the total number of
1731 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1732 GST_DEBUG_OBJECT (parse,
1733 "Limiting index entries to %d, indexing byte interval %"
1734 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1738 gst_query_unref (query);
1740 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1741 G_GUINT64_FORMAT ")", seekable, start, stop);
1742 parse->priv->upstream_seekable = seekable;
1743 parse->priv->upstream_size = seekable ? stop : 0;
1745 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1746 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1747 parse->priv->idx_byte_interval = idx_byte_interval;
1750 /* some misc checks on upstream */
1752 gst_base_parse_check_upstream (GstBaseParse * parse)
1756 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1757 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1758 /* upstream has one, accept it also, and no further updates */
1759 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1760 parse->priv->upstream_has_duration = TRUE;
1763 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1764 parse->priv->upstream_has_duration);
1767 /* checks src caps to determine if dealing with audio or video */
1768 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1770 gst_base_parse_check_media (GstBaseParse * parse)
1775 caps = gst_pad_get_current_caps (parse->srcpad);
1776 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1777 parse->priv->is_video =
1778 g_str_has_prefix (gst_structure_get_name (s), "video");
1780 /* historical default */
1781 parse->priv->is_video = FALSE;
1784 gst_caps_unref (caps);
1786 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1789 /* takes ownership of frame */
1791 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1793 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1794 /* frame allocated on the heap, we can just take ownership */
1795 g_queue_push_tail (&parse->priv->queued_frames, frame);
1796 GST_TRACE ("queued frame %p", frame);
1798 GstBaseParseFrame *copy;
1800 /* probably allocated on the stack, must make a proper copy */
1801 copy = gst_base_parse_frame_copy (frame);
1802 g_queue_push_tail (&parse->priv->queued_frames, copy);
1803 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1804 gst_base_parse_frame_free (frame);
1808 /* makes sure that @buf is properly prepared and decorated for passing
1809 * to baseclass, and an equally setup frame is returned setup with @buf.
1810 * Takes ownership of @buf. */
1811 static GstBaseParseFrame *
1812 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1814 GstBaseParseFrame *frame = NULL;
1816 buffer = gst_buffer_make_writable (buffer);
1818 GST_LOG_OBJECT (parse,
1819 "preparing frame at offset %" G_GUINT64_FORMAT
1820 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1821 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1822 gst_buffer_get_size (buffer));
1824 if (parse->priv->discont) {
1825 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1826 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1827 parse->priv->discont = FALSE;
1830 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1832 frame = gst_base_parse_frame_new (buffer, 0, 0);
1834 /* also ensure to update state flags */
1835 gst_base_parse_frame_update (parse, frame, buffer);
1836 gst_buffer_unref (buffer);
1838 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1839 GST_LOG_OBJECT (parse, "marking as new frame");
1840 parse->priv->new_frame = FALSE;
1841 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1844 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1846 /* use default handler to provide initial (upstream) metadata */
1847 gst_base_parse_parse_frame (parse, frame);
1852 /* Wraps buffer in a frame and dispatches to subclass.
1853 * Also manages data skipping and offset handling (including adapter flushing).
1854 * Takes ownership of @buffer */
1855 static GstFlowReturn
1856 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1857 gint * skip, gint * flushed)
1859 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1860 GstBaseParseFrame *frame;
1863 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1865 GST_LOG_OBJECT (parse,
1866 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1867 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1868 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1869 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1870 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1872 /* track what is being flushed during this single round of frame processing */
1873 parse->priv->flushed = 0;
1876 /* make it easy for _finish_frame to pick up input data */
1877 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1878 gst_buffer_ref (buffer);
1879 gst_adapter_push (parse->priv->adapter, buffer);
1882 frame = gst_base_parse_prepare_frame (parse, buffer);
1883 ret = klass->handle_frame (parse, frame, skip);
1885 *flushed = parse->priv->flushed;
1887 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1890 /* subclass can only do one of these, or semantics are too unclear */
1891 g_assert (*skip == 0 || *flushed == 0);
1893 /* track skipping */
1895 GstClockTime pts, dts;
1898 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1899 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1900 /* reverse playback, and no frames found yet, so we are skipping
1901 * the leading part of a fragment, which may form the tail of
1902 * fragment coming later, hopefully subclass skips efficiently ... */
1903 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1904 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1905 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1906 outbuf = gst_buffer_make_writable (outbuf);
1907 GST_BUFFER_PTS (outbuf) = pts;
1908 GST_BUFFER_DTS (outbuf) = dts;
1909 parse->priv->buffers_head =
1910 g_slist_prepend (parse->priv->buffers_head, outbuf);
1913 gst_adapter_flush (parse->priv->adapter, *skip);
1915 if (!parse->priv->discont)
1916 parse->priv->sync_offset = parse->priv->offset;
1917 parse->priv->offset += *skip;
1918 parse->priv->discont = TRUE;
1919 /* check for indefinite skipping */
1920 if (ret == GST_FLOW_OK)
1921 ret = gst_base_parse_check_sync (parse);
1924 parse->priv->offset += *flushed;
1926 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1927 gst_adapter_clear (parse->priv->adapter);
1930 gst_base_parse_frame_free (frame);
1935 /* gst_base_parse_handle_and_push_buffer:
1936 * @parse: #GstBaseParse.
1937 * @klass: #GstBaseParseClass.
1938 * @frame: (transfer full): a #GstBaseParseFrame
1940 * Parses the frame from given buffer and pushes it forward. Also performs
1941 * timestamp handling and checks the segment limits.
1943 * This is called with srcpad STREAM_LOCK held.
1945 * Returns: #GstFlowReturn
1947 static GstFlowReturn
1948 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
1949 GstBaseParseFrame * frame)
1954 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
1956 buffer = frame->buffer;
1957 offset = frame->offset;
1959 /* check if subclass/format can provide ts.
1960 * If so, that allows and enables extra seek and duration determining options */
1961 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
1962 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
1963 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1964 parse->priv->first_frame_offset = offset;
1965 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
1966 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
1967 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
1968 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
1969 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
1970 GST_TIME_ARGS (parse->priv->first_frame_pts),
1971 parse->priv->first_frame_offset);
1972 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
1974 GstClockTime last_ts = G_MAXINT64;
1976 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
1977 gst_base_parse_locate_time (parse, &last_ts, &off);
1978 if (GST_CLOCK_TIME_IS_VALID (last_ts))
1979 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
1982 /* disable further checks */
1983 parse->priv->first_frame_offset = 0;
1987 /* again use default handler to add missing metadata;
1988 * we may have new information on frame properties */
1989 gst_base_parse_parse_frame (parse, frame);
1991 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1992 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
1993 parse->priv->next_dts =
1994 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
1995 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
1996 GstClockTime next_pts =
1997 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
1998 if (next_pts >= parse->priv->next_dts)
1999 parse->priv->next_pts = next_pts;
2002 /* we lost track, do not produce bogus time next time around
2003 * (probably means parser subclass has given up on parsing as well) */
2004 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2005 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2008 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2009 GST_BUFFER_PTS_IS_VALID (buffer))
2010 gst_base_parse_add_index_entry (parse, offset,
2011 GST_BUFFER_PTS (buffer),
2012 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2014 /* All OK, push queued frames if there are any */
2015 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2016 GstBaseParseFrame *queued_frame;
2018 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2019 gst_base_parse_push_frame (parse, queued_frame);
2023 return gst_base_parse_push_frame (parse, frame);
2027 * gst_base_parse_push_frame:
2028 * @parse: #GstBaseParse.
2029 * @frame: (transfer none): a #GstBaseParseFrame
2031 * Pushes the frame's buffer downstream, sends any pending events and
2032 * does some timestamp and segment handling. Takes ownership of
2033 * frame's buffer, though caller retains ownership of @frame.
2035 * This must be called with sinkpad STREAM_LOCK held.
2037 * Returns: #GstFlowReturn
2040 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2042 GstFlowReturn ret = GST_FLOW_OK;
2043 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2044 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2045 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2049 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2050 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2052 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2054 buffer = frame->buffer;
2056 GST_LOG_OBJECT (parse,
2057 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2058 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2059 gst_buffer_get_size (buffer),
2060 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2061 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2062 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2065 parse->priv->bytecount += frame->size;
2066 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2067 parse->priv->framecount++;
2068 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2069 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2072 /* 0 means disabled */
2073 if (parse->priv->update_interval < 0)
2074 parse->priv->update_interval = 50;
2075 else if (parse->priv->update_interval > 0 &&
2076 (parse->priv->framecount % parse->priv->update_interval) == 0)
2077 gst_base_parse_update_duration (parse);
2079 if (GST_BUFFER_PTS_IS_VALID (buffer))
2080 last_start = last_stop = GST_BUFFER_PTS (buffer);
2081 if (last_start != GST_CLOCK_TIME_NONE
2082 && GST_BUFFER_DURATION_IS_VALID (buffer))
2083 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2085 /* should have caps by now */
2086 if (!gst_pad_has_current_caps (parse->srcpad))
2089 if (G_UNLIKELY (parse->priv->pending_segment)) {
2090 /* have caps; check identity */
2091 gst_base_parse_check_media (parse);
2094 /* Push pending events, including SEGMENT events */
2095 if (G_UNLIKELY (parse->priv->pending_events)) {
2096 GList *r = g_list_reverse (parse->priv->pending_events);
2099 parse->priv->pending_events = NULL;
2100 for (l = r; l != NULL; l = l->next) {
2101 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2104 parse->priv->pending_segment = FALSE;
2107 /* segment adjustment magic; only if we are running the whole show */
2108 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2109 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2110 parse->priv->upstream_seekable)) {
2112 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2113 GST_CLOCK_TIME_IS_VALID (last_start)) {
2114 GstClockTimeDiff diff;
2116 /* only send newsegments with increasing start times,
2117 * otherwise if these go back and forth downstream (sinks) increase
2118 * accumulated time and running_time */
2119 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2120 if (G_UNLIKELY (diff > 2 * GST_SECOND
2121 && last_start > parse->segment.start
2122 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2123 || last_start < parse->segment.stop))) {
2125 GST_DEBUG_OBJECT (parse,
2126 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2127 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2128 "Sending updated SEGMENT events", diff,
2129 GST_TIME_ARGS (parse->segment.position),
2130 GST_TIME_ARGS (last_start));
2132 /* skip gap FIXME */
2133 gst_pad_push_event (parse->srcpad,
2134 gst_event_new_segment (&parse->segment));
2136 parse->segment.position = last_start;
2141 /* update bitrates and optionally post corresponding tags
2142 * (following newsegment) */
2143 gst_base_parse_update_bitrates (parse, frame);
2145 if (klass->pre_push_frame) {
2146 ret = klass->pre_push_frame (parse, frame);
2148 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2151 /* take final ownership of frame buffer */
2152 if (frame->out_buffer) {
2153 buffer = frame->out_buffer;
2154 frame->out_buffer = NULL;
2155 gst_buffer_replace (&frame->buffer, NULL);
2157 buffer = frame->buffer;
2158 frame->buffer = NULL;
2161 /* subclass must play nice */
2162 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2164 size = gst_buffer_get_size (buffer);
2166 parse->priv->seen_keyframe |= parse->priv->is_video &&
2167 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2169 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2170 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2171 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2172 GST_BUFFER_TIMESTAMP (buffer) >
2173 parse->segment.stop + parse->priv->lead_out_ts) {
2174 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2176 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2177 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2178 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2179 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2180 parse->priv->lead_in_ts < parse->segment.start) {
2181 if (parse->priv->seen_keyframe) {
2182 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2185 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2186 ret = GST_BASE_PARSE_FLOW_DROPPED;
2193 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2194 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2195 gst_buffer_unref (buffer);
2197 } else if (ret == GST_FLOW_OK) {
2198 if (parse->segment.rate > 0.0) {
2199 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2201 ret = gst_pad_push (parse->srcpad, buffer);
2202 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2204 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2206 parse->priv->buffers_queued =
2207 g_slist_prepend (parse->priv->buffers_queued, buffer);
2211 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2212 size, gst_flow_get_name (ret));
2213 gst_buffer_unref (buffer);
2214 /* if we are not sufficiently in control, let upstream decide on EOS */
2215 if (ret == GST_FLOW_EOS &&
2216 (parse->priv->passthrough ||
2217 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2218 !parse->priv->upstream_seekable)))
2222 /* Update current running segment position */
2223 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2224 parse->segment.position < last_stop)
2225 parse->segment.position = last_stop;
2232 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2233 return GST_FLOW_ERROR;
2238 * gst_base_parse_finish_frame:
2239 * @parse: a #GstBaseParse
2240 * @frame: a #GstBaseParseFrame
2241 * @size: consumed input data represented by frame
2243 * Collects parsed data and pushes this downstream.
2244 * Source pad caps must be set when this is called.
2246 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2247 * Otherwise, @size samples will be taken from the input and used for output,
2248 * and the output's metadata (timestamps etc) will be taken as (optionally)
2249 * set by the subclass on @frame's (input) buffer (which is otherwise
2250 * ignored for any but the above purpose/information).
2252 * Note that the latter buffer is invalidated by this call, whereas the
2253 * caller retains ownership of @frame.
2255 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2258 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2261 GstFlowReturn ret = GST_FLOW_OK;
2263 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2264 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2265 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2266 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2269 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2270 "flushing size %d", frame->offset, size);
2272 /* some one-time start-up */
2273 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2274 gst_base_parse_check_seekability (parse);
2275 gst_base_parse_check_upstream (parse);
2278 parse->priv->flushed += size;
2280 if (parse->priv->scanning && frame->buffer) {
2281 if (!parse->priv->scanned_frame) {
2282 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2287 /* either PUSH or PULL mode arranges for adapter data */
2288 /* ensure output buffer */
2289 if (!frame->out_buffer) {
2290 GstBuffer *src, *dest;
2292 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2293 dest = frame->out_buffer;
2294 src = frame->buffer;
2295 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2296 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2297 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2298 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2299 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2300 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2302 gst_adapter_flush (parse->priv->adapter, size);
2305 /* use as input for subsequent processing */
2306 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2307 gst_buffer_unref (frame->out_buffer);
2308 frame->out_buffer = NULL;
2310 /* mark input size consumed */
2313 /* subclass might queue frames/data internally if it needs more
2314 * frames to decide on the format, or might request us to queue here. */
2315 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2316 gst_buffer_replace (&frame->buffer, NULL);
2318 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2319 GstBaseParseFrame *copy;
2321 copy = gst_base_parse_frame_copy (frame);
2322 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2323 gst_base_parse_queue_frame (parse, copy);
2327 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2333 /* gst_base_parse_drain:
2335 * Drains the adapter until it is empty. It decreases the min_frame_size to
2336 * match the current adapter size and calls chain method until the adapter
2337 * is emptied or chain returns with error.
2340 gst_base_parse_drain (GstBaseParse * parse)
2344 GST_DEBUG_OBJECT (parse, "draining");
2345 parse->priv->drain = TRUE;
2348 avail = gst_adapter_available (parse->priv->adapter);
2352 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2353 NULL) != GST_FLOW_OK) {
2357 /* nothing changed, maybe due to truncated frame; break infinite loop */
2358 if (avail == gst_adapter_available (parse->priv->adapter)) {
2359 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2360 gst_adapter_clear (parse->priv->adapter);
2364 parse->priv->drain = FALSE;
2367 /* gst_base_parse_send_buffers
2369 * Sends buffers collected in send_buffers downstream, and ensures that list
2370 * is empty at the end (errors or not).
2372 static GstFlowReturn
2373 gst_base_parse_send_buffers (GstBaseParse * parse)
2375 GSList *send = NULL;
2377 GstFlowReturn ret = GST_FLOW_OK;
2379 send = parse->priv->buffers_send;
2383 buf = GST_BUFFER_CAST (send->data);
2384 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2385 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2386 ", offset %" G_GINT64_FORMAT, buf,
2387 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2388 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2389 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2391 /* iterate output queue an push downstream */
2392 ret = gst_pad_push (parse->srcpad, buf);
2393 send = g_slist_delete_link (send, send);
2395 /* clear any leftover if error */
2396 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2398 buf = GST_BUFFER_CAST (send->data);
2399 gst_buffer_unref (buf);
2400 send = g_slist_delete_link (send, send);
2405 parse->priv->buffers_send = send;
2410 /* gst_base_parse_start_fragment:
2412 * Prepares for processing a reverse playback (forward) fragment
2413 * by (re)setting proper state variables.
2415 static GstFlowReturn
2416 gst_base_parse_start_fragment (GstBaseParse * parse)
2418 GST_LOG_OBJECT (parse, "starting fragment");
2420 /* invalidate so no fall-back timestamping is performed;
2421 * ok if taken from subclass or upstream */
2422 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2423 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2424 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2425 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2426 /* prevent it hanging around stop all the time */
2427 parse->segment.position = GST_CLOCK_TIME_NONE;
2429 parse->priv->discont = TRUE;
2431 /* head of previous fragment is now pending tail of current fragment */
2432 parse->priv->buffers_pending = parse->priv->buffers_head;
2433 parse->priv->buffers_head = NULL;
2439 /* gst_base_parse_finish_fragment:
2441 * Processes a reverse playback (forward) fragment:
2442 * - append head of last fragment that was skipped to current fragment data
2443 * - drain the resulting current fragment data (i.e. repeated chain)
2444 * - add time/duration (if needed) to frames queued by chain
2445 * - push queued data
2447 static GstFlowReturn
2448 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2451 GstFlowReturn ret = GST_FLOW_OK;
2452 gboolean seen_key = FALSE, seen_delta = FALSE;
2454 GST_LOG_OBJECT (parse, "finishing fragment");
2457 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2458 while (parse->priv->buffers_pending) {
2459 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2461 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2462 gst_buffer_get_size (buf));
2463 gst_adapter_push (parse->priv->adapter, buf);
2465 GST_LOG_OBJECT (parse, "discarding head buffer");
2466 gst_buffer_unref (buf);
2468 parse->priv->buffers_pending =
2469 g_slist_delete_link (parse->priv->buffers_pending,
2470 parse->priv->buffers_pending);
2473 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2474 /* initial skipped data is added to buffers_pending */
2475 gst_base_parse_drain (parse);
2477 if (parse->priv->buffers_send) {
2478 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2479 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2482 /* add metadata (if needed to queued buffers */
2483 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2484 GST_TIME_ARGS (parse->priv->last_pts));
2485 while (parse->priv->buffers_queued) {
2486 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2488 /* no touching if upstream or parsing provided time */
2489 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2490 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2491 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2492 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2493 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2494 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2495 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2497 parse->priv->last_pts = 0;
2498 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2499 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2500 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2502 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2503 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2504 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2506 parse->priv->last_dts = 0;
2507 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2508 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2509 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2512 /* no idea, very bad */
2513 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2516 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2517 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2519 /* reverse order for ascending sending */
2520 /* send downstream at keyframe not preceded by a keyframe
2521 * (e.g. that should identify start of collection of IDR nals) */
2522 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2524 ret = gst_base_parse_send_buffers (parse);
2525 /* if a problem, throw all to sending */
2526 if (ret != GST_FLOW_OK) {
2527 parse->priv->buffers_send =
2528 g_slist_reverse (parse->priv->buffers_queued);
2529 parse->priv->buffers_queued = NULL;
2539 parse->priv->buffers_send =
2540 g_slist_prepend (parse->priv->buffers_send, buf);
2541 parse->priv->buffers_queued =
2542 g_slist_delete_link (parse->priv->buffers_queued,
2543 parse->priv->buffers_queued);
2546 /* audio may have all marked as keyframe, so arrange to send here */
2548 ret = gst_base_parse_send_buffers (parse);
2550 /* any trailing unused no longer usable (ideally none) */
2551 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2552 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2553 gst_adapter_available (parse->priv->adapter));
2554 gst_adapter_clear (parse->priv->adapter);
2560 /* small helper that checks whether we have been trying to resync too long */
2561 static inline GstFlowReturn
2562 gst_base_parse_check_sync (GstBaseParse * parse)
2564 if (G_UNLIKELY (parse->priv->discont &&
2565 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2566 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2567 ("Failed to parse stream"), (NULL));
2568 return GST_FLOW_ERROR;
2574 static GstFlowReturn
2575 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2577 GstBaseParseClass *bclass;
2578 GstBaseParse *parse;
2579 GstFlowReturn ret = GST_FLOW_OK;
2580 GstBuffer *tmpbuf = NULL;
2585 GstClockTime pts, dts;
2587 parse = GST_BASE_PARSE (parent);
2588 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2590 if (parse->priv->detecting) {
2591 GstBuffer *detect_buf;
2593 if (parse->priv->detect_buffers_size == 0) {
2594 detect_buf = gst_buffer_ref (buffer);
2599 detect_buf = gst_buffer_new ();
2601 for (l = parse->priv->detect_buffers; l; l = l->next) {
2602 gsize tmpsize = gst_buffer_get_size (l->data);
2604 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2605 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2609 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2610 offset, gst_buffer_get_size (buffer));
2613 ret = bclass->detect (parse, detect_buf);
2614 gst_buffer_unref (detect_buf);
2616 if (ret == GST_FLOW_OK) {
2619 /* Detected something */
2620 parse->priv->detecting = FALSE;
2622 for (l = parse->priv->detect_buffers; l; l = l->next) {
2623 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2625 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2626 parent, GST_BUFFER_CAST (l->data));
2628 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2630 g_list_free (parse->priv->detect_buffers);
2631 parse->priv->detect_buffers = NULL;
2632 parse->priv->detect_buffers_size = 0;
2634 if (ret != GST_FLOW_OK) {
2638 /* Handle the current buffer */
2639 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2640 /* Still detecting, append buffer or error out if draining */
2642 if (parse->priv->drain) {
2643 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2644 return GST_FLOW_ERROR;
2645 } else if (parse->priv->flushing) {
2646 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2648 g_list_free (parse->priv->detect_buffers);
2649 parse->priv->detect_buffers = NULL;
2650 parse->priv->detect_buffers_size = 0;
2652 parse->priv->detect_buffers =
2653 g_list_append (parse->priv->detect_buffers, buffer);
2654 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2658 /* Something went wrong, subclass responsible for error reporting */
2662 /* And now handle the current buffer if detection worked */
2665 if (G_LIKELY (buffer)) {
2666 GST_LOG_OBJECT (parse,
2667 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2668 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2669 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2670 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2671 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2673 if (G_UNLIKELY (parse->priv->passthrough)) {
2674 GstBaseParseFrame frame;
2676 gst_base_parse_frame_init (&frame);
2677 frame.buffer = gst_buffer_make_writable (buffer);
2678 ret = gst_base_parse_push_frame (parse, &frame);
2679 gst_base_parse_frame_free (&frame);
2682 /* upstream feeding us in reverse playback;
2683 * finish previous fragment and start new upon DISCONT */
2684 if (parse->segment.rate < 0.0) {
2685 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2686 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2687 ret = gst_base_parse_finish_fragment (parse, TRUE);
2688 gst_base_parse_start_fragment (parse);
2691 gst_adapter_push (parse->priv->adapter, buffer);
2694 /* Parse and push as many frames as possible */
2695 /* Stop either when adapter is empty or we are flushing */
2696 while (!parse->priv->flushing) {
2699 /* note: if subclass indicates MAX fsize,
2700 * this will not likely be available anyway ... */
2701 min_size = MAX (parse->priv->min_frame_size, fsize);
2702 av = gst_adapter_available (parse->priv->adapter);
2704 if (G_UNLIKELY (parse->priv->drain)) {
2706 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2707 if (G_UNLIKELY (!min_size)) {
2712 /* Collect at least min_frame_size bytes */
2713 if (av < min_size) {
2714 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2718 /* move along with upstream timestamp (if any),
2719 * but interpolate in between */
2720 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2721 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2722 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2723 parse->priv->prev_pts = parse->priv->next_pts = pts;
2725 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2726 parse->priv->prev_dts = parse->priv->next_dts = dts;
2728 /* always pass all available data */
2729 data = gst_adapter_map (parse->priv->adapter, av);
2730 /* arrange for actual data to be copied if subclass tries to,
2731 * since what is passed is tied to the adapter */
2732 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2733 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2735 /* keep the adapter mapped, so keep track of what has to be flushed */
2736 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2739 /* probably already implicitly unmapped due to adapter operation,
2740 * but for good measure ... */
2741 gst_adapter_unmap (parse->priv->adapter);
2742 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2745 if (skip == 0 && flush == 0) {
2746 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2747 "breaking to get more data");
2753 GST_LOG_OBJECT (parse, "chain leaving");
2757 /* pull @size bytes at current offset,
2758 * i.e. at least try to and possibly return a shorter buffer if near the end */
2759 static GstFlowReturn
2760 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2761 GstBuffer ** buffer)
2763 GstFlowReturn ret = GST_FLOW_OK;
2765 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2767 /* Caching here actually makes much less difference than one would expect.
2768 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2769 if (parse->priv->cache) {
2770 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2771 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2773 if (cache_offset <= parse->priv->offset &&
2774 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2775 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2776 parse->priv->offset - cache_offset, size);
2777 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2780 /* not enough data in the cache, free cache and get a new one */
2781 gst_buffer_unref (parse->priv->cache);
2782 parse->priv->cache = NULL;
2785 /* refill the cache */
2787 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2788 64 * 1024), &parse->priv->cache);
2789 if (ret != GST_FLOW_OK) {
2790 parse->priv->cache = NULL;
2794 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2796 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2798 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2802 /* Not possible to get enough data, try a last time with
2803 * requesting exactly the size we need */
2804 gst_buffer_unref (parse->priv->cache);
2805 parse->priv->cache = NULL;
2807 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2808 &parse->priv->cache);
2810 if (ret != GST_FLOW_OK) {
2811 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2816 if (gst_buffer_get_size (parse->priv->cache) < size) {
2817 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2818 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2819 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2821 *buffer = parse->priv->cache;
2822 parse->priv->cache = NULL;
2828 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2829 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2834 static GstFlowReturn
2835 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2838 GstClockTime ts = 0;
2842 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2843 ", last_offset = %" G_GINT64_FORMAT,
2844 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
2846 if (!parse->priv->last_offset
2847 || parse->priv->last_pts <= parse->segment.start) {
2848 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2849 GST_TIME_ARGS (parse->segment.start));
2854 /* last fragment started at last_offset / last_ts;
2855 * seek back 10s capped at 1MB */
2856 if (parse->priv->last_pts >= 10 * GST_SECOND)
2857 ts = parse->priv->last_pts - 10 * GST_SECOND;
2858 /* if we are exact now, we will be more so going backwards */
2859 if (parse->priv->exact_position) {
2860 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2862 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
2863 GST_FORMAT_BYTES, &offset)) {
2864 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2867 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2868 parse->priv->last_offset - 1024);
2869 offset = MAX (0, offset);
2871 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2873 parse->priv->offset = offset;
2875 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2877 if (ret != GST_FLOW_OK)
2880 /* offset will increase again as fragment is processed/parsed */
2881 parse->priv->last_offset = offset;
2883 gst_base_parse_start_fragment (parse);
2884 gst_adapter_push (parse->priv->adapter, buffer);
2885 ret = gst_base_parse_finish_fragment (parse, TRUE);
2886 if (ret != GST_FLOW_OK)
2889 /* force previous fragment */
2890 parse->priv->offset = -1;
2897 * pull and scan for next frame starting from current offset
2898 * ajusts sync, drain and offset going along */
2899 static GstFlowReturn
2900 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
2903 GstFlowReturn ret = GST_FLOW_OK;
2904 guint fsize, min_size;
2908 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
2909 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
2911 /* let's make this efficient for all subclass once and for all;
2912 * maybe it does not need this much, but in the latter case, we know we are
2913 * in pull mode here and might as well try to read and supply more anyway
2914 * (so does the buffer caching mechanism) */
2918 min_size = MAX (parse->priv->min_frame_size, fsize);
2920 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
2922 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
2923 if (ret != GST_FLOW_OK)
2926 /* if we got a short read, inform subclass we are draining leftover
2927 * and no more is to be expected */
2928 if (gst_buffer_get_size (buffer) < min_size) {
2929 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
2930 parse->priv->drain = TRUE;
2933 if (parse->priv->detecting) {
2934 ret = klass->detect (parse, buffer);
2935 if (ret == GST_FLOW_NOT_NEGOTIATED) {
2936 /* If draining we error out, otherwise request a buffer
2938 if (parse->priv->drain) {
2939 gst_buffer_unref (buffer);
2940 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
2941 return GST_FLOW_ERROR;
2944 gst_buffer_unref (buffer);
2947 } else if (ret != GST_FLOW_OK) {
2948 gst_buffer_unref (buffer);
2949 GST_ERROR_OBJECT (parse, "detect() returned %s",
2950 gst_flow_get_name (ret));
2954 /* Else handle this buffer normally */
2957 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
2958 if (ret != GST_FLOW_OK)
2961 /* something flushed means something happened,
2962 * and we should bail out of this loop so as not to occupy
2963 * the task thread indefinitely */
2965 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
2968 /* nothing flushed, no skip and draining, so nothing left to do */
2969 if (!skip && parse->priv->drain) {
2970 GST_LOG_OBJECT (parse, "no activity or result when draining; "
2971 "breaking loop and marking EOS");
2975 /* otherwise, get some more data
2976 * note that is checked this does not happen indefinitely */
2978 GST_LOG_OBJECT (parse, "getting some more data");
2981 parse->priv->drain = FALSE;
2988 /* Loop that is used in pull mode to retrieve data from upstream */
2990 gst_base_parse_loop (GstPad * pad)
2992 GstBaseParse *parse;
2993 GstBaseParseClass *klass;
2994 GstFlowReturn ret = GST_FLOW_OK;
2996 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
2997 klass = GST_BASE_PARSE_GET_CLASS (parse);
2999 GST_LOG_OBJECT (parse, "Entering parse loop");
3001 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3005 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3008 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3009 gst_pad_push_event (parse->srcpad, gst_event_new_stream_start (stream_id));
3010 parse->priv->push_stream_start = FALSE;
3014 /* reverse playback:
3015 * first fragment (closest to stop time) is handled normally below,
3016 * then we pull in fragments going backwards */
3017 if (parse->segment.rate < 0.0) {
3018 /* check if we jumped back to a previous fragment,
3019 * which is a post-first fragment */
3020 if (parse->priv->offset < 0) {
3021 ret = gst_base_parse_handle_previous_fragment (parse);
3026 ret = gst_base_parse_scan_frame (parse, klass);
3027 if (ret != GST_FLOW_OK)
3030 /* eat expected eos signalling past segment in reverse playback */
3031 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3032 parse->segment.position >= parse->segment.stop) {
3033 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3034 /* push what was accumulated during loop run */
3035 gst_base_parse_finish_fragment (parse, FALSE);
3036 /* force previous fragment */
3037 parse->priv->offset = -1;
3042 if (ret == GST_FLOW_EOS)
3044 else if (ret != GST_FLOW_OK)
3047 gst_object_unref (parse);
3054 GST_DEBUG_OBJECT (parse, "eos");
3059 gboolean push_eos = FALSE;
3061 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3062 gst_flow_get_name (ret));
3063 gst_pad_pause_task (parse->sinkpad);
3065 if (ret == GST_FLOW_EOS) {
3066 /* handle end-of-stream/segment */
3067 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3070 if ((stop = parse->segment.stop) == -1)
3071 stop = parse->segment.duration;
3073 GST_DEBUG_OBJECT (parse, "sending segment_done");
3075 gst_element_post_message
3076 (GST_ELEMENT_CAST (parse),
3077 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3078 GST_FORMAT_TIME, stop));
3079 gst_pad_push_event (parse->srcpad,
3080 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3082 /* If we STILL have zero frames processed, fire an error */
3083 if (parse->priv->framecount == 0) {
3084 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3085 ("No valid frames found before end of stream"), (NULL));
3089 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3090 /* for fatal errors we post an error message, wrong-state is
3091 * not fatal because it happens due to flushes and only means
3092 * that we should stop now. */
3093 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3094 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3098 /* Push pending events, including SEGMENT events */
3099 if (G_UNLIKELY (parse->priv->pending_events)) {
3100 GList *r = g_list_reverse (parse->priv->pending_events);
3103 parse->priv->pending_events = NULL;
3104 for (l = r; l != NULL; l = l->next) {
3105 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
3108 parse->priv->pending_segment = FALSE;
3111 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3113 gst_object_unref (parse);
3118 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3120 GstSchedulingFlags sched_flags;
3121 GstBaseParse *parse;
3125 parse = GST_BASE_PARSE (parent);
3127 GST_DEBUG_OBJECT (parse, "sink activate");
3129 query = gst_query_new_scheduling ();
3130 if (!gst_pad_peer_query (sinkpad, query)) {
3131 gst_query_unref (query);
3132 goto baseparse_push;
3135 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3137 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3138 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3140 gst_query_unref (query);
3143 goto baseparse_push;
3145 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3146 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3147 goto baseparse_push;
3149 parse->priv->push_stream_start = TRUE;
3151 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3156 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3157 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3162 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3164 GstBaseParseClass *klass;
3165 gboolean result = TRUE;
3167 GST_DEBUG_OBJECT (parse, "activate %d", active);
3169 klass = GST_BASE_PARSE_GET_CLASS (parse);
3172 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3173 result = klass->start (parse);
3175 /* If the subclass implements ::detect we want to
3176 * call it for the first buffers now */
3177 parse->priv->detecting = (klass->detect != NULL);
3179 /* We must make sure streaming has finished before resetting things
3180 * and calling the ::stop vfunc */
3181 GST_PAD_STREAM_LOCK (parse->sinkpad);
3182 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3184 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3185 result = klass->stop (parse);
3187 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3189 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3194 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3195 GstPadMode mode, gboolean active)
3198 GstBaseParse *parse;
3200 parse = GST_BASE_PARSE (parent);
3202 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3203 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3205 if (!gst_base_parse_activate (parse, active))
3206 goto activate_failed;
3209 case GST_PAD_MODE_PULL:
3211 parse->priv->pending_events =
3212 g_list_prepend (parse->priv->pending_events,
3213 gst_event_new_segment (&parse->segment));
3214 parse->priv->pending_segment = TRUE;
3217 result = gst_pad_stop_task (pad);
3225 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3227 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3234 GST_DEBUG_OBJECT (parse, "activate failed");
3240 * gst_base_parse_set_duration:
3241 * @parse: #GstBaseParse.
3243 * @duration: duration value.
3244 * @interval: how often to update the duration estimate based on bitrate, or 0.
3246 * Sets the duration of the currently playing media. Subclass can use this
3247 * when it is able to determine duration and/or notices a change in the media
3248 * duration. Alternatively, if @interval is non-zero (default), then stream
3249 * duration is determined based on estimated bitrate, and updated every @interval
3253 gst_base_parse_set_duration (GstBaseParse * parse,
3254 GstFormat fmt, gint64 duration, gint interval)
3256 g_return_if_fail (parse != NULL);
3258 if (parse->priv->upstream_has_duration) {
3259 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3263 if (duration != parse->priv->duration) {
3266 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3267 gst_element_post_message (GST_ELEMENT (parse), m);
3269 /* TODO: what about duration tag? */
3271 parse->priv->duration = duration;
3272 parse->priv->duration_fmt = fmt;
3273 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3274 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3275 if (interval != 0) {
3276 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3280 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3281 parse->priv->update_interval = interval;
3287 * gst_base_parse_set_average_bitrate:
3288 * @parse: #GstBaseParse.
3289 * @bitrate: average bitrate in bits/second
3291 * Optionally sets the average bitrate detected in media (if non-zero),
3292 * e.g. based on metadata, as it will be posted to the application.
3294 * By default, announced average bitrate is estimated. The average bitrate
3295 * is used to estimate the total duration of the stream and to estimate
3296 * a seek position, if there's no index and the format is syncable
3297 * (see gst_base_parse_set_syncable()).
3300 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3302 parse->priv->bitrate = bitrate;
3303 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3307 * gst_base_parse_set_min_frame_size:
3308 * @parse: #GstBaseParse.
3309 * @min_size: Minimum size of the data that this base class should give to
3312 * Subclass can use this function to tell the base class that it needs to
3313 * give at least #min_size buffers.
3316 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3318 g_return_if_fail (parse != NULL);
3320 parse->priv->min_frame_size = min_size;
3321 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3325 * gst_base_parse_set_frame_rate:
3326 * @parse: the #GstBaseParse to set
3327 * @fps_num: frames per second (numerator).
3328 * @fps_den: frames per second (denominator).
3329 * @lead_in: frames needed before a segment for subsequent decode
3330 * @lead_out: frames needed after a segment
3332 * If frames per second is configured, parser can take care of buffer duration
3333 * and timestamping. When performing segment clipping, or seeking to a specific
3334 * location, a corresponding decoder might need an initial @lead_in and a
3335 * following @lead_out number of frames to ensure the desired segment is
3336 * entirely filled upon decoding.
3339 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3340 guint fps_den, guint lead_in, guint lead_out)
3342 g_return_if_fail (parse != NULL);
3344 parse->priv->fps_num = fps_num;
3345 parse->priv->fps_den = fps_den;
3346 if (!fps_num || !fps_den) {
3347 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3349 fps_num = fps_den = 0;
3350 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3351 parse->priv->lead_in = parse->priv->lead_out = 0;
3352 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3354 parse->priv->frame_duration =
3355 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3356 parse->priv->lead_in = lead_in;
3357 parse->priv->lead_out = lead_out;
3358 parse->priv->lead_in_ts =
3359 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3360 parse->priv->lead_out_ts =
3361 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3362 /* aim for about 1.5s to estimate duration */
3363 if (parse->priv->update_interval < 0) {
3364 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3365 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3366 parse->priv->update_interval);
3369 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3370 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3371 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3372 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3373 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3374 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3378 * gst_base_parse_set_has_timing_info:
3379 * @parse: a #GstBaseParse
3380 * @has_timing: whether frames carry timing information
3382 * Set if frames carry timing information which the subclass can (generally)
3383 * parse and provide. In particular, intrinsic (rather than estimated) time
3384 * can be obtained following a seek.
3387 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3389 parse->priv->has_timing_info = has_timing;
3390 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3394 * gst_base_parse_set_syncable:
3395 * @parse: a #GstBaseParse
3396 * @syncable: set if frame starts can be identified
3398 * Set if frame starts can be identified. This is set by default and
3399 * determines whether seeking based on bitrate averages
3400 * is possible for a format/stream.
3403 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3405 parse->priv->syncable = syncable;
3406 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3410 * gst_base_parse_set_passthrough:
3411 * @parse: a #GstBaseParse
3412 * @passthrough: %TRUE if parser should run in passthrough mode
3414 * Set if the nature of the format or configuration does not allow (much)
3415 * parsing, and the parser should operate in passthrough mode (which only
3416 * applies when operating in push mode). That is, incoming buffers are
3417 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3418 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3419 * so subclass can perform as much or as little is appropriate for
3420 * passthrough semantics in @pre_push_frame.
3423 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3425 parse->priv->passthrough = passthrough;
3426 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3430 * gst_base_parse_set_pts_interpolation:
3431 * @parse: a #GstBaseParse
3432 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3434 * By default, the base class will guess PTS timestamps using a simple
3435 * interpolation (previous timestamp + duration), which is incorrect for
3436 * data streams with reordering, where PTS can go backward. Sub-classes
3437 * implementing such formats should disable PTS interpolation.
3440 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3441 gboolean pts_interpolate)
3443 parse->priv->pts_interpolate = pts_interpolate;
3444 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3445 (pts_interpolate) ? "yes" : "no");
3449 * gst_base_parse_set_latency:
3450 * @parse: a #GstBaseParse
3451 * @min_latency: minimum parse latency
3452 * @max_latency: maximum parse latency
3454 * Sets the minimum and maximum (which may likely be equal) latency introduced
3455 * by the parsing process. If there is such a latency, which depends on the
3456 * particular parsing of the format, it typically corresponds to 1 frame duration.
3459 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3460 GstClockTime max_latency)
3462 GST_OBJECT_LOCK (parse);
3463 parse->priv->min_latency = min_latency;
3464 parse->priv->max_latency = max_latency;
3465 GST_OBJECT_UNLOCK (parse);
3466 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3467 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3468 GST_TIME_ARGS (max_latency));
3472 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3473 GstClockTime * duration)
3475 gboolean res = FALSE;
3477 g_return_val_if_fail (duration != NULL, FALSE);
3479 *duration = GST_CLOCK_TIME_NONE;
3480 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3481 GST_LOG_OBJECT (parse, "using provided duration");
3482 *duration = parse->priv->duration;
3484 } else if (parse->priv->duration != -1) {
3485 GST_LOG_OBJECT (parse, "converting provided duration");
3486 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3487 parse->priv->duration, format, (gint64 *) duration);
3488 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3489 GST_LOG_OBJECT (parse, "using estimated duration");
3490 *duration = parse->priv->estimated_duration;
3493 GST_LOG_OBJECT (parse, "cannot estimate duration");
3496 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3497 GST_TIME_ARGS (*duration));
3502 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3504 gboolean res = FALSE;
3507 pad = GST_BASE_PARSE_SRC_PAD (parse);
3509 switch (GST_QUERY_TYPE (query)) {
3510 case GST_QUERY_POSITION:
3515 GST_DEBUG_OBJECT (parse, "position query");
3516 gst_query_parse_position (query, &format, NULL);
3518 /* try upstream first */
3519 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3521 /* Fall back on interpreting segment */
3522 GST_OBJECT_LOCK (parse);
3523 if (format == GST_FORMAT_BYTES) {
3524 dest_value = parse->priv->offset;
3526 } else if (format == parse->segment.format &&
3527 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3528 dest_value = gst_segment_to_stream_time (&parse->segment,
3529 parse->segment.format, parse->segment.position);
3532 GST_OBJECT_UNLOCK (parse);
3534 /* no precise result, upstream no idea either, then best estimate */
3535 /* priv->offset is updated in both PUSH/PULL modes */
3536 res = gst_base_parse_convert (parse,
3537 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3540 gst_query_set_position (query, format, dest_value);
3544 case GST_QUERY_DURATION:
3547 GstClockTime duration;
3549 GST_DEBUG_OBJECT (parse, "duration query");
3550 gst_query_parse_duration (query, &format, NULL);
3552 /* consult upstream */
3553 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3555 /* otherwise best estimate from us */
3557 res = gst_base_parse_get_duration (parse, format, &duration);
3559 gst_query_set_duration (query, format, duration);
3563 case GST_QUERY_SEEKING:
3566 GstClockTime duration = GST_CLOCK_TIME_NONE;
3567 gboolean seekable = FALSE;
3569 GST_DEBUG_OBJECT (parse, "seeking query");
3570 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3572 /* consult upstream */
3573 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3575 /* we may be able to help if in TIME */
3576 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3577 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3578 /* already OK if upstream takes care */
3579 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3581 if (!(res && seekable)) {
3582 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3583 || duration == -1) {
3584 /* seekable if we still have a chance to get duration later on */
3586 parse->priv->upstream_seekable && parse->priv->update_interval;
3588 seekable = parse->priv->upstream_seekable;
3589 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3592 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3598 case GST_QUERY_FORMATS:
3599 gst_query_set_formatsv (query, 3, fmtlist);
3602 case GST_QUERY_CONVERT:
3604 GstFormat src_format, dest_format;
3605 gint64 src_value, dest_value;
3607 gst_query_parse_convert (query, &src_format, &src_value,
3608 &dest_format, &dest_value);
3610 res = gst_base_parse_convert (parse, src_format, src_value,
3611 dest_format, &dest_value);
3613 gst_query_set_convert (query, src_format, src_value,
3614 dest_format, dest_value);
3618 case GST_QUERY_LATENCY:
3620 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3622 GstClockTime min_latency, max_latency;
3624 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3625 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3626 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3627 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3629 GST_OBJECT_LOCK (parse);
3630 /* add our latency */
3631 if (min_latency != -1)
3632 min_latency += parse->priv->min_latency;
3633 if (max_latency != -1)
3634 max_latency += parse->priv->max_latency;
3635 GST_OBJECT_UNLOCK (parse);
3637 gst_query_set_latency (query, live, min_latency, max_latency);
3642 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3648 /* scans for a cluster start from @pos,
3649 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3650 static GstFlowReturn
3651 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3652 GstClockTime * time, GstClockTime * duration)
3654 GstBaseParseClass *klass;
3656 gboolean orig_drain, orig_discont;
3657 GstFlowReturn ret = GST_FLOW_OK;
3658 GstBuffer *buf = NULL;
3659 GstBaseParseFrame *sframe = NULL;
3661 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3662 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3663 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3665 klass = GST_BASE_PARSE_GET_CLASS (parse);
3667 *time = GST_CLOCK_TIME_NONE;
3668 *duration = GST_CLOCK_TIME_NONE;
3671 orig_offset = parse->priv->offset;
3672 orig_discont = parse->priv->discont;
3673 orig_drain = parse->priv->drain;
3675 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3676 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3678 /* jump elsewhere and locate next frame */
3679 parse->priv->offset = *pos;
3680 /* mark as scanning so frames don't get processed all the way */
3681 parse->priv->scanning = TRUE;
3682 ret = gst_base_parse_scan_frame (parse, klass);
3683 parse->priv->scanning = FALSE;
3684 /* retrieve frame found during scan */
3685 sframe = parse->priv->scanned_frame;
3686 parse->priv->scanned_frame = NULL;
3688 if (ret != GST_FLOW_OK || !sframe)
3691 /* get offset first, subclass parsing might dump other stuff in there */
3692 *pos = sframe->offset;
3693 buf = sframe->buffer;
3696 /* but it should provide proper time */
3697 *time = GST_BUFFER_TIMESTAMP (buf);
3698 *duration = GST_BUFFER_DURATION (buf);
3700 GST_LOG_OBJECT (parse,
3701 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3702 GST_TIME_ARGS (*time), *pos);
3706 gst_base_parse_frame_free (sframe);
3709 parse->priv->offset = orig_offset;
3710 parse->priv->discont = orig_discont;
3711 parse->priv->drain = orig_drain;
3716 /* bisect and scan through file for frame starting before @time,
3717 * returns OK and @time/@offset if found, NONE and/or error otherwise
3718 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3719 static GstFlowReturn
3720 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3723 GstFlowReturn ret = GST_FLOW_OK;
3724 gint64 lpos, hpos, newpos;
3725 GstClockTime time, ltime, htime, newtime, dur;
3726 gboolean cont = TRUE;
3727 const GstClockTime tolerance = TARGET_DIFFERENCE;
3728 const guint chunk = 4 * 1024;
3730 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3731 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3733 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3734 GST_TIME_ARGS (*_time));
3736 /* TODO also make keyframe aware if useful some day */
3751 /* do not know at first */
3753 *_time = GST_CLOCK_TIME_NONE;
3755 /* need initial positions; start and end */
3756 lpos = parse->priv->first_frame_offset;
3757 ltime = parse->priv->first_frame_pts;
3758 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3759 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3760 return GST_FLOW_ERROR;
3762 hpos = parse->priv->upstream_size;
3764 GST_DEBUG_OBJECT (parse,
3765 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3766 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, htime,
3767 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3769 /* check preconditions are satisfied;
3770 * start and end are needed, except for special case where we scan for
3771 * last frame to determine duration */
3772 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3773 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3774 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3778 /* shortcut cases */
3781 } else if (time < ltime + tolerance) {
3785 } else if (time >= htime) {
3791 while (htime > ltime && cont) {
3792 GST_LOG_OBJECT (parse,
3793 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3794 GST_TIME_ARGS (ltime));
3795 GST_LOG_OBJECT (parse,
3796 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3797 GST_TIME_ARGS (htime));
3798 if (G_UNLIKELY (time == G_MAXINT64)) {
3800 } else if (G_LIKELY (hpos > lpos)) {
3802 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3805 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3807 /* we check this case once, but not forever, so break loop */
3812 newpos = CLAMP (newpos, lpos, hpos);
3813 GST_LOG_OBJECT (parse,
3814 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3815 GST_TIME_ARGS (time), newpos);
3817 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3818 if (ret == GST_FLOW_EOS) {
3819 /* heuristic HACK */
3820 hpos = MAX (lpos, hpos - chunk);
3822 } else if (ret != GST_FLOW_OK) {
3826 if (newtime == -1 || newpos == -1) {
3827 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3831 if (G_UNLIKELY (time == G_MAXINT64)) {
3834 if (GST_CLOCK_TIME_IS_VALID (dur))
3837 } else if (newtime > time) {
3839 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3841 } else if (newtime + tolerance > time) {
3842 /* close enough undershoot */
3846 } else if (newtime < ltime) {
3847 /* so a position beyond lpos resulted in earlier time than ltime ... */
3848 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
3851 /* undershoot too far */
3852 newpos += newpos == lpos ? chunk : 0;
3853 lpos = CLAMP (newpos, lpos, hpos);
3859 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
3860 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
3865 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
3866 gboolean before, GstClockTime * _ts)
3868 gint64 bytes = 0, ts = 0;
3869 GstIndexEntry *entry = NULL;
3871 if (time == GST_CLOCK_TIME_NONE) {
3877 GST_BASE_PARSE_INDEX_LOCK (parse);
3878 if (parse->priv->index) {
3879 /* Let's check if we have an index entry for that time */
3880 entry = gst_index_get_assoc_entry (parse->priv->index,
3881 parse->priv->index_id,
3882 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
3883 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
3887 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
3888 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
3890 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
3891 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
3892 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
3894 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
3895 GST_TIME_ARGS (time));
3898 ts = GST_CLOCK_TIME_NONE;
3901 GST_BASE_PARSE_INDEX_UNLOCK (parse);
3910 /* returns TRUE if seek succeeded */
3912 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
3917 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
3918 gboolean flush, update, res = TRUE, accurate;
3919 gint64 start, stop, seekpos, seekstop;
3920 GstSegment seeksegment = { 0, };
3921 GstClockTime start_ts;
3923 /* try upstream first, unless we're driving the streaming thread ourselves */
3924 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
3925 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
3930 gst_event_parse_seek (event, &rate, &format, &flags,
3931 &start_type, &start, &stop_type, &stop);
3933 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
3934 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
3935 GST_TIME_FORMAT, gst_format_get_name (format), rate,
3936 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
3938 /* we can only handle TIME, so check if subclass can convert
3939 * to TIME format if it's some other format (such as DEFAULT) */
3940 if (format != GST_FORMAT_TIME) {
3941 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
3942 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
3944 goto no_convert_to_time;
3946 GST_INFO_OBJECT (parse, "converted %s format to start time "
3947 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
3948 gst_format_get_name (format), GST_TIME_ARGS (start),
3949 GST_TIME_ARGS (stop));
3951 format = GST_FORMAT_TIME;
3954 /* no negative rates in push mode (unless upstream takes care of that, but
3955 * we've already tried upstream and it didn't handle the seek request) */
3956 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
3959 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
3960 goto negative_rate_pull_mode;
3962 if (start_type != GST_SEEK_TYPE_SET ||
3963 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
3966 /* get flush flag */
3967 flush = flags & GST_SEEK_FLAG_FLUSH;
3969 /* copy segment, we need this because we still need the old
3970 * segment when we close the current segment. */
3971 gst_segment_copy_into (&parse->segment, &seeksegment);
3973 GST_DEBUG_OBJECT (parse, "configuring seek");
3974 gst_segment_do_seek (&seeksegment, rate, format, flags,
3975 start_type, start, stop_type, stop, &update);
3977 /* accurate seeking implies seek tables are used to obtain position,
3978 * and the requested segment is maintained exactly, not adjusted any way */
3979 accurate = flags & GST_SEEK_FLAG_ACCURATE;
3981 /* maybe we can be accurate for (almost) free */
3982 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
3983 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
3984 GST_DEBUG_OBJECT (parse, "accurate seek possible");
3988 GstClockTime startpos = seeksegment.position;
3990 /* accurate requested, so ... seek a bit before target */
3991 if (startpos < parse->priv->lead_in_ts)
3994 startpos -= parse->priv->lead_in_ts;
3995 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
3996 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
3999 start_ts = seeksegment.position;
4000 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4001 GST_FORMAT_BYTES, &seekpos))
4002 goto convert_failed;
4003 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4004 GST_FORMAT_BYTES, &seekstop))
4005 goto convert_failed;
4008 GST_DEBUG_OBJECT (parse,
4009 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4011 GST_DEBUG_OBJECT (parse,
4012 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4013 seeksegment.stop, seekstop);
4015 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4018 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4021 if (parse->srcpad) {
4022 GST_DEBUG_OBJECT (parse, "sending flush start");
4023 gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
4024 /* unlock upstream pull_range */
4025 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
4028 gst_pad_pause_task (parse->sinkpad);
4031 /* we should now be able to grab the streaming thread because we stopped it
4032 * with the above flush/pause code */
4033 GST_PAD_STREAM_LOCK (parse->sinkpad);
4035 /* save current position */
4036 last_stop = parse->segment.position;
4037 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4040 /* now commit to new position */
4042 /* prepare for streaming again */
4044 GST_DEBUG_OBJECT (parse, "sending flush stop");
4045 gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop (TRUE));
4046 gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop (TRUE));
4047 gst_base_parse_clear_queues (parse);
4049 /* keep track of our position */
4050 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4051 seeksegment.format, parse->segment.position);
4054 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4056 /* store the newsegment event so it can be sent from the streaming thread. */
4057 /* This will be sent later in _loop() */
4058 parse->priv->pending_segment = TRUE;
4059 parse->priv->pending_events =
4060 g_list_prepend (parse->priv->pending_events,
4061 gst_event_new_segment (&parse->segment));
4063 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4064 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4065 ", time = %" GST_TIME_FORMAT, format,
4066 GST_TIME_ARGS (parse->segment.start),
4067 GST_TIME_ARGS (parse->segment.stop),
4068 GST_TIME_ARGS (parse->segment.time));
4070 /* one last chance in pull mode to stay accurate;
4071 * maybe scan and subclass can find where to go */
4074 GstClockTime ts = seeksegment.position;
4076 gst_base_parse_locate_time (parse, &ts, &scanpos);
4080 /* running collected index now consists of several intervals,
4081 * so optimized check no longer possible */
4082 parse->priv->index_last_valid = FALSE;
4083 parse->priv->index_last_offset = 0;
4084 parse->priv->index_last_ts = 0;
4088 /* mark discont if we are going to stream from another position. */
4089 if (seekpos != parse->priv->offset) {
4090 GST_DEBUG_OBJECT (parse,
4091 "mark DISCONT, we did a seek to another position");
4092 parse->priv->offset = seekpos;
4093 parse->priv->last_offset = seekpos;
4094 parse->priv->seen_keyframe = FALSE;
4095 parse->priv->discont = TRUE;
4096 parse->priv->next_dts = start_ts;
4097 if (parse->priv->pts_interpolate)
4098 parse->priv->next_pts = start_ts;
4099 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4100 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4101 parse->priv->sync_offset = seekpos;
4102 parse->priv->exact_position = accurate;
4105 /* Start streaming thread if paused */
4106 gst_pad_start_task (parse->sinkpad,
4107 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4109 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4114 GstEvent *new_event;
4115 GstBaseParseSeek *seek;
4116 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4118 /* The only thing we need to do in PUSH-mode is to send the
4119 seek event (in bytes) to upstream. Segment / flush handling happens
4120 in corresponding src event handlers */
4121 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4122 if (seekstop >= 0 && seekstop <= seekpos)
4124 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4125 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4127 /* store segment info so its precise details can be reconstructed when
4128 * receiving newsegment;
4129 * this matters for all details when accurate seeking,
4130 * is most useful to preserve NONE stop time otherwise */
4131 seek = g_new0 (GstBaseParseSeek, 1);
4132 seek->segment = seeksegment;
4133 seek->accurate = accurate;
4134 seek->offset = seekpos;
4135 seek->start_ts = start_ts;
4136 GST_OBJECT_LOCK (parse);
4137 /* less optimal, but preserves order */
4138 parse->priv->pending_seeks =
4139 g_slist_append (parse->priv->pending_seeks, seek);
4140 GST_OBJECT_UNLOCK (parse);
4142 res = gst_pad_push_event (parse->sinkpad, new_event);
4145 GST_OBJECT_LOCK (parse);
4146 parse->priv->pending_seeks =
4147 g_slist_remove (parse->priv->pending_seeks, seek);
4148 GST_OBJECT_UNLOCK (parse);
4154 gst_event_unref (event);
4158 negative_rate_pull_mode:
4160 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4166 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4172 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4178 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4179 "couldn't convert that into TIME format", gst_format_get_name (format));
4185 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4191 /* Checks if bitrates are available from upstream tags so that we don't
4192 * override them later
4195 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4197 GstTagList *taglist = NULL;
4200 gst_event_parse_tag (event, &taglist);
4202 /* We only care about stream tags here */
4203 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4206 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4207 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4208 parse->priv->post_min_bitrate = FALSE;
4210 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4211 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4212 parse->priv->post_avg_bitrate = FALSE;
4214 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4215 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4216 parse->priv->post_max_bitrate = FALSE;
4222 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4224 GstBaseParse *parse = GST_BASE_PARSE (element);
4226 GST_BASE_PARSE_INDEX_LOCK (parse);
4227 if (parse->priv->index)
4228 gst_object_unref (parse->priv->index);
4230 parse->priv->index = gst_object_ref (index);
4231 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4232 &parse->priv->index_id);
4233 parse->priv->own_index = FALSE;
4235 parse->priv->index = NULL;
4237 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4241 gst_base_parse_get_index (GstElement * element)
4243 GstBaseParse *parse = GST_BASE_PARSE (element);
4244 GstIndex *result = NULL;
4246 GST_BASE_PARSE_INDEX_LOCK (parse);
4247 if (parse->priv->index)
4248 result = gst_object_ref (parse->priv->index);
4249 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4255 static GstStateChangeReturn
4256 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4258 GstBaseParse *parse;
4259 GstStateChangeReturn result;
4261 parse = GST_BASE_PARSE (element);
4263 switch (transition) {
4264 case GST_STATE_CHANGE_READY_TO_PAUSED:
4265 /* If this is our own index destroy it as the
4266 * old entries might be wrong for the new stream */
4267 GST_BASE_PARSE_INDEX_LOCK (parse);
4268 if (parse->priv->own_index) {
4269 gst_object_unref (parse->priv->index);
4270 parse->priv->index = NULL;
4271 parse->priv->own_index = FALSE;
4274 /* If no index was created, generate one */
4275 if (G_UNLIKELY (!parse->priv->index)) {
4276 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4278 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4279 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4280 &parse->priv->index_id);
4281 parse->priv->own_index = TRUE;
4283 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4289 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4291 switch (transition) {
4292 case GST_STATE_CHANGE_PAUSED_TO_READY:
4293 gst_base_parse_reset (parse);