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 * @title: GstBaseParse
27 * @short_description: Base class for stream parsers
28 * @see_also: #GstBaseTransform
30 * This base class is for parser elements that process data and splits it
31 * into separate audio/video/whatever frames.
35 * * provides one sink pad and one source pad
36 * * handles state changes
37 * * can operate in pull mode or push mode
38 * * handles seeking in both modes
39 * * handles events (SEGMENT/EOS/FLUSH)
40 * * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
43 * The purpose of this base class is to provide the basic functionality of
44 * a parser and share a lot of rather complex code.
46 * # Description of the parsing mechanism:
50 * * #GstBaseParse calls @start to inform subclass that data processing is
53 * * #GstBaseParse class calls @set_sink_caps to inform the subclass about
54 * incoming sinkpad caps. Subclass could already set the srcpad caps
55 * accordingly, but this might be delayed until calling
56 * gst_base_parse_finish_frame() with a non-queued frame.
58 * * At least at this point subclass needs to tell the #GstBaseParse class
59 * how big data chunks it wants to receive (min_frame_size). It can do
60 * this with gst_base_parse_set_min_frame_size().
62 * * #GstBaseParse class sets up appropriate data passing mode (pull/push)
63 * and starts to process the data.
67 * * #GstBaseParse gathers at least min_frame_size bytes of data either
68 * by pulling it from upstream or collecting buffers in an internal
71 * * A buffer of (at least) min_frame_size bytes is passed to subclass with
72 * @handle_frame. Subclass checks the contents and can optionally
73 * return GST_FLOW_OK along with an amount of data to be skipped to find
74 * a valid frame (which will result in a subsequent DISCONT).
75 * If, otherwise, the buffer does not hold a complete frame,
76 * @handle_frame can merely return and will be called again when additional
77 * data is available. In push mode this amounts to an
78 * additional input buffer (thus minimal additional latency), in pull mode
79 * this amounts to some arbitrary reasonable buffer size increase.
80 * Of course, gst_base_parse_set_min_frame_size() could also be used if a
81 * very specific known amount of additional data is required.
82 * If, however, the buffer holds a complete valid frame, it can pass
83 * the size of this frame to gst_base_parse_finish_frame().
84 * If acting as a converter, it can also merely indicate consumed input data
85 * while simultaneously providing custom output data.
86 * Note that baseclass performs some processing (such as tracking
87 * overall consumed data rate versus duration) for each finished frame,
88 * but other state is only updated upon each call to @handle_frame
89 * (such as tracking upstream input timestamp).
91 * Subclass is also responsible for setting the buffer metadata
92 * (e.g. buffer timestamp and duration, or keyframe if applicable).
93 * (although the latter can also be done by #GstBaseParse if it is
94 * appropriately configured, see below). Frame is provided with
95 * timestamp derived from upstream (as much as generally possible),
96 * duration obtained from configuration (see below), and offset
97 * if meaningful (in pull mode).
99 * Note that @check_valid_frame might receive any small
100 * amount of input data when leftover data is being drained (e.g. at EOS).
102 * * As part of finish frame processing,
103 * just prior to actually pushing the buffer in question,
104 * it is passed to @pre_push_frame which gives subclass yet one
105 * last chance to examine buffer metadata, or to send some custom (tag)
106 * events, or to perform custom (segment) filtering.
108 * * During the parsing process #GstBaseParseClass will handle both srcpad
109 * and sinkpad events. They will be passed to subclass if @event or
110 * @src_event callbacks have been provided.
114 * * #GstBaseParse class calls @stop to inform the subclass that data
115 * parsing will be stopped.
117 * Subclass is responsible for providing pad template caps for
118 * source and sink pads. The pads need to be named "sink" and "src". It also
119 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
120 * when base class calls subclass' @set_sink_caps function).
122 * This base class uses %GST_FORMAT_DEFAULT as a meaning of frames. So,
123 * subclass conversion routine needs to know that conversion from
124 * %GST_FORMAT_TIME to %GST_FORMAT_DEFAULT must return the
125 * frame number that can be found from the given byte position.
127 * #GstBaseParse uses subclasses conversion methods also for seeking (or
128 * otherwise uses its own default one, see also below).
130 * Subclass @start and @stop functions will be called to inform the beginning
131 * and end of data processing.
133 * Things that subclass need to take care of:
135 * * Provide pad templates
136 * * Fixate the source pad caps when appropriate
137 * * Inform base class how big data chunks should be retrieved. This is
138 * done with gst_base_parse_set_min_frame_size() function.
139 * * Examine data chunks passed to subclass with @handle_frame and pass
140 * proper frame(s) to gst_base_parse_finish_frame(), and setting src pad
141 * caps and timestamps on frame.
142 * * Provide conversion functions
143 * * Update the duration information with gst_base_parse_set_duration()
144 * * Optionally passthrough using gst_base_parse_set_passthrough()
145 * * Configure various baseparse parameters using
146 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
147 * and gst_base_parse_set_frame_rate().
149 * * In particular, if subclass is unable to determine a duration, but
150 * parsing (or specs) yields a frames per seconds rate, then this can be
151 * provided to #GstBaseParse to enable it to cater for
152 * buffer time metadata (which will be taken from upstream as much as
153 * possible). Internally keeping track of frame durations and respective
154 * sizes that have been pushed provides #GstBaseParse with an estimated
155 * bitrate. A default @convert (used if not overridden) will then use these
156 * rates to perform obvious conversions. These rates are also used to
157 * update (estimated) duration at regular frame intervals.
162 * - In push mode provide a queue of adapter-"queued" buffers for upstream
164 * - Queue buffers/events until caps are set
174 #include <gst/base/gstadapter.h>
176 #include "gstbaseparse.h"
178 /* FIXME: get rid of old GstIndex code */
179 #include "gstindex.h"
180 #include "gstindex.c"
181 #include "gstmemindex.c"
183 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
185 #define MIN_FRAMES_TO_POST_BITRATE 10
186 #define TARGET_DIFFERENCE (20 * GST_SECOND)
187 #define MAX_INDEX_ENTRIES 4096
188 #define UPDATE_THRESHOLD 2
190 #define ABSDIFF(a,b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
192 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
193 #define GST_CAT_DEFAULT gst_base_parse_debug
195 /* Supported formats */
196 static const GstFormat fmtlist[] = {
203 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
204 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
206 struct _GstBaseParsePrivate
213 GstFormat duration_fmt;
214 gint64 estimated_duration;
215 gint64 estimated_drift;
217 guint min_frame_size;
218 gboolean disable_passthrough;
219 gboolean passthrough;
220 gboolean pts_interpolate;
223 gboolean has_timing_info;
224 guint fps_num, fps_den;
225 gint update_interval;
227 guint lead_in, lead_out;
228 GstClockTime lead_in_ts, lead_out_ts;
229 GstClockTime min_latency, max_latency;
238 GstClockTime next_pts;
239 GstClockTime next_dts;
240 GstClockTime prev_pts;
241 GstClockTime prev_dts;
242 gboolean prev_dts_from_pts;
243 GstClockTime frame_duration;
244 gboolean seen_keyframe;
250 guint64 data_bytecount;
251 guint64 acc_duration;
252 GstClockTime first_frame_pts;
253 GstClockTime first_frame_dts;
254 gint64 first_frame_offset;
256 gboolean post_min_bitrate;
257 gboolean post_avg_bitrate;
258 gboolean post_max_bitrate;
263 guint posted_avg_bitrate;
265 /* frames/buffers that are queued and ready to go on OK */
266 GQueue queued_frames;
270 /* index entry storage, either ours or provided */
276 /* seek table entries only maintained if upstream is BYTE seekable */
277 gboolean upstream_seekable;
278 gboolean upstream_has_duration;
279 gint64 upstream_size;
280 GstFormat upstream_format;
281 /* minimum distance between two index entries */
282 GstClockTimeDiff idx_interval;
283 guint64 idx_byte_interval;
284 /* ts and offset of last entry added */
285 GstClockTime index_last_ts;
286 gint64 index_last_offset;
287 gboolean index_last_valid;
289 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
290 gboolean exact_position;
291 /* seek events are temporarily kept to match them with newsegments */
292 GSList *pending_seeks;
294 /* reverse playback */
295 GSList *buffers_pending;
296 GSList *buffers_head;
297 GSList *buffers_queued;
298 GSList *buffers_send;
299 GstClockTime last_pts;
300 GstClockTime last_dts;
303 /* Pending serialized events */
304 GList *pending_events;
306 /* If baseparse has checked the caps to identify if it is
307 * handling video or audio */
308 gboolean checked_media;
310 /* offset of last parsed frame/data */
312 /* force a new frame, regardless of offset */
314 /* whether we are merely scanning for a frame */
316 /* ... and resulting frame, if any */
317 GstBaseParseFrame *scanned_frame;
319 /* TRUE if we're still detecting the format, i.e.
320 * if ::detect() is still called for future buffers */
322 GList *detect_buffers;
323 guint detect_buffers_size;
325 /* True when no buffers have been received yet */
326 gboolean first_buffer;
328 /* if TRUE, a STREAM_START event needs to be pushed */
329 gboolean push_stream_start;
331 /* When we need to skip more data than we have currently */
334 /* Tag handling (stream tags only, global tags are passed through as-is) */
335 GstTagList *upstream_tags;
336 GstTagList *parser_tags;
337 GstTagMergeMode parser_tags_merge_mode;
338 gboolean tags_changed;
341 typedef struct _GstBaseParseSeek
346 GstClockTime start_ts;
349 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
354 PROP_DISABLE_PASSTHROUGH,
358 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
359 g_mutex_lock (&parse->priv->index_lock);
360 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
361 g_mutex_unlock (&parse->priv->index_lock);
363 static GstElementClass *parent_class = NULL;
365 static void gst_base_parse_class_init (GstBaseParseClass * klass);
366 static void gst_base_parse_init (GstBaseParse * parse,
367 GstBaseParseClass * klass);
370 gst_base_parse_get_type (void)
372 static volatile gsize base_parse_type = 0;
374 if (g_once_init_enter (&base_parse_type)) {
375 static const GTypeInfo base_parse_info = {
376 sizeof (GstBaseParseClass),
377 (GBaseInitFunc) NULL,
378 (GBaseFinalizeFunc) NULL,
379 (GClassInitFunc) gst_base_parse_class_init,
382 sizeof (GstBaseParse),
384 (GInstanceInitFunc) gst_base_parse_init,
388 _type = g_type_register_static (GST_TYPE_ELEMENT,
389 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
390 g_once_init_leave (&base_parse_type, _type);
392 return (GType) base_parse_type;
395 static void gst_base_parse_finalize (GObject * object);
397 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
398 GstStateChange transition);
399 static void gst_base_parse_reset (GstBaseParse * parse);
402 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
403 static GstIndex *gst_base_parse_get_index (GstElement * element);
406 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
408 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
409 GstObject * parent, GstPadMode mode, gboolean active);
410 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
412 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
413 GstTagList * taglist);
415 static void gst_base_parse_set_property (GObject * object, guint prop_id,
416 const GValue * value, GParamSpec * pspec);
417 static void gst_base_parse_get_property (GObject * object, guint prop_id,
418 GValue * value, GParamSpec * pspec);
420 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
422 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
425 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
427 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
430 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
432 static void gst_base_parse_loop (GstPad * pad);
434 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
435 GstBaseParseFrame * frame);
437 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
440 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
443 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
445 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
448 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
449 GstClockTime time, gboolean before, GstClockTime * _ts);
450 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
451 GstClockTime * _time, gint64 * _offset);
453 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
454 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
456 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
458 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
460 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
462 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
465 gst_base_parse_clear_queues (GstBaseParse * parse)
467 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
468 g_slist_free (parse->priv->buffers_queued);
469 parse->priv->buffers_queued = NULL;
470 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
472 g_slist_free (parse->priv->buffers_pending);
473 parse->priv->buffers_pending = NULL;
474 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
475 g_slist_free (parse->priv->buffers_head);
476 parse->priv->buffers_head = NULL;
477 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
478 g_slist_free (parse->priv->buffers_send);
479 parse->priv->buffers_send = NULL;
481 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
482 g_list_free (parse->priv->detect_buffers);
483 parse->priv->detect_buffers = NULL;
484 parse->priv->detect_buffers_size = 0;
486 g_queue_foreach (&parse->priv->queued_frames,
487 (GFunc) gst_base_parse_frame_free, NULL);
488 g_queue_clear (&parse->priv->queued_frames);
490 gst_buffer_replace (&parse->priv->cache, NULL);
492 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
493 g_list_free (parse->priv->pending_events);
494 parse->priv->pending_events = NULL;
496 parse->priv->checked_media = FALSE;
500 gst_base_parse_finalize (GObject * object)
502 GstBaseParse *parse = GST_BASE_PARSE (object);
504 g_object_unref (parse->priv->adapter);
506 if (parse->priv->index) {
507 gst_object_unref (parse->priv->index);
508 parse->priv->index = NULL;
510 g_mutex_clear (&parse->priv->index_lock);
512 gst_base_parse_clear_queues (parse);
514 G_OBJECT_CLASS (parent_class)->finalize (object);
518 gst_base_parse_class_init (GstBaseParseClass * klass)
520 GObjectClass *gobject_class;
521 GstElementClass *gstelement_class;
523 gobject_class = G_OBJECT_CLASS (klass);
524 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
525 parent_class = g_type_class_peek_parent (klass);
527 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
528 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
529 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
532 * GstBaseParse:disable-passthrough:
534 * If set to %TRUE, baseparse will unconditionally force parsing of the
535 * incoming data. This can be required in the rare cases where the incoming
536 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
537 * force validation and parsing of the incoming data.
538 * If set to %FALSE, decision of whether to parse the data or not is up to
539 * the implementation (standard behaviour).
541 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
542 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
543 "Force processing (disables passthrough)",
544 DEFAULT_DISABLE_PASSTHROUGH,
545 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
547 gstelement_class = (GstElementClass *) klass;
548 gstelement_class->change_state =
549 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
552 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
553 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
556 /* Default handlers */
557 klass->sink_event = gst_base_parse_sink_event_default;
558 klass->src_event = gst_base_parse_src_event_default;
559 klass->sink_query = gst_base_parse_sink_query_default;
560 klass->src_query = gst_base_parse_src_query_default;
561 klass->convert = gst_base_parse_convert_default;
563 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
564 "baseparse element");
568 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
570 GstPadTemplate *pad_template;
572 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
574 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
577 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
578 g_return_if_fail (pad_template != NULL);
579 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
580 gst_pad_set_event_function (parse->sinkpad,
581 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
582 gst_pad_set_query_function (parse->sinkpad,
583 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
584 gst_pad_set_chain_function (parse->sinkpad,
585 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
586 gst_pad_set_activate_function (parse->sinkpad,
587 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
588 gst_pad_set_activatemode_function (parse->sinkpad,
589 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
590 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
591 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
593 GST_DEBUG_OBJECT (parse, "sinkpad created");
596 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
597 g_return_if_fail (pad_template != NULL);
598 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
599 gst_pad_set_event_function (parse->srcpad,
600 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
601 gst_pad_set_query_function (parse->srcpad,
602 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
603 gst_pad_use_fixed_caps (parse->srcpad);
604 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
605 GST_DEBUG_OBJECT (parse, "src created");
607 g_queue_init (&parse->priv->queued_frames);
609 parse->priv->adapter = gst_adapter_new ();
611 parse->priv->pad_mode = GST_PAD_MODE_NONE;
613 g_mutex_init (&parse->priv->index_lock);
616 gst_base_parse_reset (parse);
617 GST_DEBUG_OBJECT (parse, "init ok");
619 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
621 parse->priv->upstream_tags = NULL;
622 parse->priv->parser_tags = NULL;
623 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
627 gst_base_parse_set_property (GObject * object, guint prop_id,
628 const GValue * value, GParamSpec * pspec)
630 GstBaseParse *parse = GST_BASE_PARSE (object);
633 case PROP_DISABLE_PASSTHROUGH:
634 parse->priv->disable_passthrough = g_value_get_boolean (value);
637 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
643 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
646 GstBaseParse *parse = GST_BASE_PARSE (object);
649 case PROP_DISABLE_PASSTHROUGH:
650 g_value_set_boolean (value, parse->priv->disable_passthrough);
653 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
659 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
661 GstBaseParseFrame *copy;
663 copy = g_slice_dup (GstBaseParseFrame, frame);
664 copy->buffer = gst_buffer_ref (frame->buffer);
665 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
667 GST_TRACE ("copied frame %p -> %p", frame, copy);
673 gst_base_parse_frame_free (GstBaseParseFrame * frame)
675 GST_TRACE ("freeing frame %p", frame);
678 gst_buffer_unref (frame->buffer);
679 frame->buffer = NULL;
682 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
683 g_slice_free (GstBaseParseFrame, frame);
685 memset (frame, 0, sizeof (*frame));
689 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
690 (GBoxedCopyFunc) gst_base_parse_frame_copy,
691 (GBoxedFreeFunc) gst_base_parse_frame_free);
694 * gst_base_parse_frame_init:
695 * @frame: #GstBaseParseFrame.
697 * Sets a #GstBaseParseFrame to initial state. Currently this means
698 * all public fields are zero-ed and a private flag is set to make
699 * sure gst_base_parse_frame_free() only frees the contents but not
700 * the actual frame. Use this function to initialise a #GstBaseParseFrame
701 * allocated on the stack.
704 gst_base_parse_frame_init (GstBaseParseFrame * frame)
706 memset (frame, 0, sizeof (GstBaseParseFrame));
707 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
708 GST_TRACE ("inited frame %p", frame);
712 * gst_base_parse_frame_new:
713 * @buffer: (transfer none): a #GstBuffer
715 * @overhead: number of bytes in this frame which should be counted as
716 * metadata overhead, ie. not used to calculate the average bitrate.
717 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
719 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
720 * elements written in C should usually allocate the frame on the stack and
721 * then use gst_base_parse_frame_init() to initialise it.
723 * Returns: a newly-allocated #GstBaseParseFrame. Free with
724 * gst_base_parse_frame_free() when no longer needed.
727 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
730 GstBaseParseFrame *frame;
732 frame = g_slice_new0 (GstBaseParseFrame);
733 frame->buffer = gst_buffer_ref (buffer);
735 GST_TRACE ("created frame %p", frame);
740 gst_base_parse_update_flags (GstBaseParse * parse)
744 /* set flags one by one for clarity */
745 if (G_UNLIKELY (parse->priv->drain))
746 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
748 /* losing sync is pretty much a discont (and vice versa), no ? */
749 if (G_UNLIKELY (parse->priv->discont))
750 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
754 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
756 if (G_UNLIKELY (parse->priv->discont)) {
757 GST_DEBUG_OBJECT (parse, "marking DISCONT");
758 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
760 GST_BUFFER_FLAG_UNSET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
763 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
764 GST_LOG_OBJECT (parse, "marking as new frame");
765 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
768 frame->offset = parse->priv->prev_offset = parse->priv->offset;
772 gst_base_parse_reset (GstBaseParse * parse)
774 GST_OBJECT_LOCK (parse);
775 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
776 parse->priv->duration = -1;
777 parse->priv->min_frame_size = 1;
778 parse->priv->discont = TRUE;
779 parse->priv->flushing = FALSE;
780 parse->priv->saw_gaps = FALSE;
781 parse->priv->offset = 0;
782 parse->priv->sync_offset = 0;
783 parse->priv->update_interval = -1;
784 parse->priv->fps_num = parse->priv->fps_den = 0;
785 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
786 parse->priv->lead_in = parse->priv->lead_out = 0;
787 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
788 parse->priv->bitrate = 0;
789 parse->priv->framecount = 0;
790 parse->priv->bytecount = 0;
791 parse->priv->acc_duration = 0;
792 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
793 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
794 parse->priv->first_frame_offset = -1;
795 parse->priv->estimated_duration = -1;
796 parse->priv->estimated_drift = 0;
797 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
798 parse->priv->next_dts = 0;
799 parse->priv->syncable = TRUE;
800 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
801 parse->priv->passthrough = FALSE;
802 parse->priv->pts_interpolate = TRUE;
803 parse->priv->infer_ts = TRUE;
804 parse->priv->has_timing_info = FALSE;
805 parse->priv->min_bitrate = G_MAXUINT;
806 parse->priv->max_bitrate = 0;
807 parse->priv->avg_bitrate = 0;
808 parse->priv->posted_avg_bitrate = 0;
810 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
811 parse->priv->index_last_offset = -1;
812 parse->priv->index_last_valid = TRUE;
813 parse->priv->upstream_seekable = FALSE;
814 parse->priv->upstream_size = 0;
815 parse->priv->upstream_has_duration = FALSE;
816 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
817 parse->priv->idx_interval = 0;
818 parse->priv->idx_byte_interval = 0;
819 parse->priv->exact_position = TRUE;
820 parse->priv->seen_keyframe = FALSE;
821 parse->priv->checked_media = FALSE;
823 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
824 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
825 parse->priv->last_offset = 0;
827 parse->priv->skip = 0;
829 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
831 g_list_free (parse->priv->pending_events);
832 parse->priv->pending_events = NULL;
834 if (parse->priv->cache) {
835 gst_buffer_unref (parse->priv->cache);
836 parse->priv->cache = NULL;
839 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
840 g_slist_free (parse->priv->pending_seeks);
841 parse->priv->pending_seeks = NULL;
843 if (parse->priv->adapter)
844 gst_adapter_clear (parse->priv->adapter);
846 gst_base_parse_set_upstream_tags (parse, NULL);
848 if (parse->priv->parser_tags) {
849 gst_tag_list_unref (parse->priv->parser_tags);
850 parse->priv->parser_tags = NULL;
852 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
854 parse->priv->new_frame = TRUE;
856 parse->priv->first_buffer = TRUE;
858 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
859 g_list_free (parse->priv->detect_buffers);
860 parse->priv->detect_buffers = NULL;
861 parse->priv->detect_buffers_size = 0;
862 GST_OBJECT_UNLOCK (parse);
866 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
868 gboolean got_tag = FALSE;
871 if (parse->priv->upstream_tags != NULL)
872 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
874 if (!got_tag && parse->priv->parser_tags != NULL)
875 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
880 /* check if upstream or subclass tags contain bitrates already */
882 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
884 parse->priv->post_min_bitrate =
885 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
886 parse->priv->post_avg_bitrate =
887 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
888 parse->priv->post_max_bitrate =
889 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
892 /* Queues new tag event with the current combined state of the stream tags
893 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
895 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
897 GstTagList *merged_tags;
899 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
900 parse->priv->upstream_tags);
901 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
902 parse->priv->parser_tags);
903 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
906 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
907 parse->priv->parser_tags_merge_mode);
909 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
911 if (merged_tags == NULL)
914 if (gst_tag_list_is_empty (merged_tags)) {
915 gst_tag_list_unref (merged_tags);
919 if (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE) {
920 /* only add bitrate tags to non-empty taglists for now, and only if neither
921 * upstream tags nor the subclass sets the bitrate tag in question already */
922 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
923 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
924 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
925 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
927 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
928 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
929 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
930 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
932 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
933 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
934 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
935 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
936 GST_TAG_BITRATE, parse->priv->avg_bitrate, NULL);
940 parse->priv->pending_events =
941 g_list_prepend (parse->priv->pending_events,
942 gst_event_new_tag (merged_tags));
945 /* gst_base_parse_parse_frame:
946 * @parse: #GstBaseParse.
947 * @buffer: #GstBuffer.
949 * Default callback for parse_frame.
952 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
954 GstBuffer *buffer = frame->buffer;
956 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
957 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
958 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
960 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
961 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
962 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
964 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
965 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
966 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
971 /* gst_base_parse_convert:
972 * @parse: #GstBaseParse.
973 * @src_format: #GstFormat describing the source format.
974 * @src_value: Source value to be converted.
975 * @dest_format: #GstFormat defining the converted format.
976 * @dest_value: Pointer where the conversion result will be put.
978 * Converts using configured "convert" vmethod in #GstBaseParse class.
980 * Returns: %TRUE if conversion was successful.
983 gst_base_parse_convert (GstBaseParse * parse,
984 GstFormat src_format,
985 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
987 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
990 g_return_val_if_fail (dest_value != NULL, FALSE);
995 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
997 #ifndef GST_DISABLE_GST_DEBUG
1000 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1001 GST_LOG_OBJECT (parse,
1002 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1003 GST_TIME_ARGS (src_value), *dest_value);
1004 } else if (dest_format == GST_FORMAT_TIME &&
1005 src_format == GST_FORMAT_BYTES) {
1006 GST_LOG_OBJECT (parse,
1007 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1008 src_value, GST_TIME_ARGS (*dest_value));
1010 GST_LOG_OBJECT (parse,
1011 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1012 GST_STR_NULL (gst_format_get_name (src_format)),
1013 GST_STR_NULL (gst_format_get_name (dest_format)),
1014 src_value, *dest_value);
1017 GST_DEBUG_OBJECT (parse, "conversion failed");
1026 update_upstream_provided (GQuark field_id, const GValue * value,
1029 GstCaps *default_caps = user_data;
1033 caps_size = gst_caps_get_size (default_caps);
1034 for (i = 0; i < caps_size; i++) {
1035 GstStructure *structure = gst_caps_get_structure (default_caps, i);
1036 if (gst_structure_id_has_field (structure, field_id))
1037 gst_structure_id_set_value (structure, field_id, value);
1044 gst_base_parse_negotiate_default_caps (GstBaseParse * parse)
1046 GstCaps *caps, *templcaps;
1047 GstCaps *sinkcaps = NULL;
1048 GstCaps *default_caps = NULL;
1049 GstStructure *structure;
1051 templcaps = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD (parse));
1052 caps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), templcaps);
1054 gst_caps_unref (templcaps);
1059 if (!caps || gst_caps_is_empty (caps) || gst_caps_is_any (caps)) {
1063 GST_LOG_OBJECT (parse, "peer caps %" GST_PTR_FORMAT, caps);
1065 /* before fixating, try to use whatever upstream provided */
1066 default_caps = gst_caps_copy (caps);
1067 sinkcaps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
1069 GST_LOG_OBJECT (parse, "current caps %" GST_PTR_FORMAT " for sinkpad",
1073 structure = gst_caps_get_structure (sinkcaps, 0);
1074 gst_structure_foreach (structure, update_upstream_provided, default_caps);
1077 default_caps = gst_caps_fixate (default_caps);
1079 if (!default_caps) {
1080 GST_WARNING_OBJECT (parse, "Failed to create default caps !");
1084 GST_INFO_OBJECT (parse,
1085 "Chose default caps %" GST_PTR_FORMAT " for initial gap", default_caps);
1088 gst_caps_unref (sinkcaps);
1089 gst_caps_unref (caps);
1091 return default_caps;
1096 gst_caps_unref (caps);
1098 gst_caps_unref (sinkcaps);
1103 /* gst_base_parse_sink_event:
1104 * @pad: #GstPad that received the event.
1105 * @event: #GstEvent to be handled.
1107 * Handler for sink pad events.
1109 * Returns: %TRUE if the event was handled.
1112 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1114 GstBaseParse *parse = GST_BASE_PARSE (parent);
1115 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1118 ret = bclass->sink_event (parse, event);
1123 /* gst_base_parse_sink_event_default:
1124 * @parse: #GstBaseParse.
1125 * @event: #GstEvent to be handled.
1127 * Element-level event handler function.
1129 * The event will be unreffed only if it has been handled and this
1130 * function returns %TRUE
1132 * Returns: %TRUE if the event was handled and not need forwarding.
1135 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1137 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1138 gboolean ret = FALSE;
1139 gboolean forward_immediate = FALSE;
1141 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1142 GST_EVENT_TYPE_NAME (event));
1144 switch (GST_EVENT_TYPE (event)) {
1145 case GST_EVENT_CAPS:
1149 gst_event_parse_caps (event, &caps);
1150 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1152 if (klass->set_sink_caps)
1153 ret = klass->set_sink_caps (parse, caps);
1157 /* will send our own caps downstream */
1158 gst_event_unref (event);
1162 case GST_EVENT_SEGMENT:
1164 const GstSegment *in_segment;
1165 GstSegment out_segment;
1166 gint64 offset = 0, next_dts;
1167 guint32 seqnum = gst_event_get_seqnum (event);
1169 gst_event_parse_segment (event, &in_segment);
1170 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1171 out_segment.rate = in_segment->rate;
1172 out_segment.applied_rate = in_segment->applied_rate;
1174 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1176 parse->priv->upstream_format = in_segment->format;
1177 if (in_segment->format == GST_FORMAT_BYTES) {
1178 GstBaseParseSeek *seek = NULL;
1181 /* stop time is allowed to be open-ended, but not start & pos */
1182 offset = in_segment->time;
1184 GST_OBJECT_LOCK (parse);
1185 for (node = parse->priv->pending_seeks; node; node = node->next) {
1186 GstBaseParseSeek *tmp = node->data;
1188 if (tmp->offset == offset) {
1193 parse->priv->pending_seeks =
1194 g_slist_remove (parse->priv->pending_seeks, seek);
1195 GST_OBJECT_UNLOCK (parse);
1198 GST_DEBUG_OBJECT (parse,
1199 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1200 seek->accurate ? " accurate" : "", &seek->segment);
1202 out_segment.start = seek->segment.start;
1203 out_segment.stop = seek->segment.stop;
1204 out_segment.time = seek->segment.start;
1206 next_dts = seek->start_ts;
1207 parse->priv->exact_position = seek->accurate;
1210 /* best attempt convert */
1211 /* as these are only estimates, stop is kept open-ended to avoid
1212 * premature cutting */
1213 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1214 GST_FORMAT_TIME, (gint64 *) & next_dts);
1216 out_segment.start = next_dts;
1217 out_segment.stop = GST_CLOCK_TIME_NONE;
1218 out_segment.time = next_dts;
1220 parse->priv->exact_position = (in_segment->start == 0);
1223 gst_event_unref (event);
1225 event = gst_event_new_segment (&out_segment);
1226 gst_event_set_seqnum (event, seqnum);
1228 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1229 GST_SEGMENT_FORMAT, in_segment);
1231 } else if (in_segment->format != GST_FORMAT_TIME) {
1232 /* Unknown incoming segment format. Output a default open-ended
1234 gst_event_unref (event);
1236 out_segment.start = 0;
1237 out_segment.stop = GST_CLOCK_TIME_NONE;
1238 out_segment.time = 0;
1240 event = gst_event_new_segment (&out_segment);
1241 gst_event_set_seqnum (event, seqnum);
1245 /* not considered BYTE seekable if it is talking to us in TIME,
1246 * whatever else it might claim */
1247 parse->priv->upstream_seekable = FALSE;
1248 next_dts = in_segment->start;
1249 gst_event_copy_segment (event, &out_segment);
1252 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1255 gst_segment_set_newsegment (&parse->segment, update, rate,
1256 applied_rate, format, start, stop, start);
1261 /* save the segment for later, right before we push a new buffer so that
1262 * the caps are fixed and the next linked element can receive
1263 * the segment but finish the current segment */
1264 GST_DEBUG_OBJECT (parse, "draining current segment");
1265 if (in_segment->rate > 0.0)
1266 gst_base_parse_drain (parse);
1268 gst_base_parse_finish_fragment (parse, FALSE);
1269 gst_adapter_clear (parse->priv->adapter);
1271 parse->priv->offset = offset;
1272 parse->priv->sync_offset = offset;
1273 parse->priv->next_dts = next_dts;
1274 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1275 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1276 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1277 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1278 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1279 parse->priv->prev_dts_from_pts = FALSE;
1280 parse->priv->discont = TRUE;
1281 parse->priv->seen_keyframe = FALSE;
1282 parse->priv->skip = 0;
1286 case GST_EVENT_SEGMENT_DONE:
1287 /* need to drain now, rather than upon a new segment,
1288 * since that would have SEGMENT_DONE come before potential
1289 * delayed last part of the current segment */
1290 GST_DEBUG_OBJECT (parse, "draining current segment");
1291 if (parse->segment.rate > 0.0)
1292 gst_base_parse_drain (parse);
1294 gst_base_parse_finish_fragment (parse, FALSE);
1295 /* Also forward event immediately, there might be no new data
1296 * coming afterwards that would allow us to forward it later */
1297 forward_immediate = TRUE;
1300 case GST_EVENT_FLUSH_START:
1301 GST_OBJECT_LOCK (parse);
1302 parse->priv->flushing = TRUE;
1303 GST_OBJECT_UNLOCK (parse);
1306 case GST_EVENT_FLUSH_STOP:
1307 gst_adapter_clear (parse->priv->adapter);
1308 gst_base_parse_clear_queues (parse);
1309 parse->priv->flushing = FALSE;
1310 parse->priv->discont = TRUE;
1311 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1312 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1313 parse->priv->new_frame = TRUE;
1314 parse->priv->skip = 0;
1316 forward_immediate = TRUE;
1320 if (parse->segment.rate > 0.0)
1321 gst_base_parse_drain (parse);
1323 gst_base_parse_finish_fragment (parse, TRUE);
1325 /* If we STILL have zero frames processed, fire an error */
1326 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1327 !parse->priv->first_buffer) {
1328 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1329 ("No valid frames found before end of stream"), (NULL));
1332 if (!parse->priv->saw_gaps
1333 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1334 /* We've not posted bitrate tags yet - do so now */
1335 gst_base_parse_queue_tag_event_update (parse);
1338 /* newsegment and other serialized events before eos */
1339 gst_base_parse_push_pending_events (parse);
1341 forward_immediate = TRUE;
1343 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1344 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1345 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1346 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1349 const GstStructure *s;
1350 gboolean ev_still_state;
1352 s = gst_event_get_structure (event);
1354 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1355 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1356 if (ev_still_state) {
1357 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1358 if (parse->segment.rate > 0.0)
1359 gst_base_parse_drain (parse);
1361 gst_base_parse_finish_fragment (parse, TRUE);
1363 forward_immediate = TRUE;
1369 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1371 /* Ensure we have caps before forwarding the event */
1372 if (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (parse))) {
1373 GstCaps *default_caps = NULL;
1374 if ((default_caps = gst_base_parse_negotiate_default_caps (parse))) {
1376 GstEvent *caps_event = gst_event_new_caps (default_caps);
1378 GST_DEBUG_OBJECT (parse,
1379 "Store caps event to pending list for initial pre-rolling");
1381 /* Events are in decreasing order. Go down the list until we
1382 * find the first pre-CAPS event and insert our CAPS event there.
1384 * There should be a SEGMENT event already, which is > CAPS */
1385 for (l = parse->priv->pending_events; l; l = l->next) {
1386 GstEvent *e = l->data;
1388 if (GST_EVENT_TYPE (e) < GST_EVENT_CAPS) {
1389 parse->priv->pending_events =
1390 g_list_insert_before (parse->priv->pending_events, l,
1395 /* No pending event that is < CAPS, so we have to add it at the very
1396 * end of the list */
1398 parse->priv->pending_events =
1399 g_list_append (parse->priv->pending_events, caps_event);
1401 gst_caps_unref (default_caps);
1403 gst_event_unref (event);
1406 GST_ELEMENT_ERROR (parse, STREAM, FORMAT, (NULL),
1407 ("Parser output not negotiated before GAP event."));
1412 gst_base_parse_push_pending_events (parse);
1414 if (parse->segment.rate > 0.0)
1415 gst_base_parse_drain (parse);
1417 gst_base_parse_finish_fragment (parse, TRUE);
1418 forward_immediate = TRUE;
1419 parse->priv->saw_gaps = TRUE;
1424 GstTagList *tags = NULL;
1426 gst_event_parse_tag (event, &tags);
1428 /* We only care about stream tags here, global tags we just forward */
1429 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1432 gst_base_parse_set_upstream_tags (parse, tags);
1433 gst_base_parse_queue_tag_event_update (parse);
1434 parse->priv->tags_changed = FALSE;
1435 gst_event_unref (event);
1440 case GST_EVENT_STREAM_START:
1442 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1443 forward_immediate = TRUE;
1445 gst_base_parse_set_upstream_tags (parse, NULL);
1446 parse->priv->tags_changed = TRUE;
1453 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1454 * For EOS this is required because no buffer or serialized event
1455 * will come after EOS and nothing could trigger another
1456 * _finish_frame() call. *
1457 * If the subclass handles sending of EOS manually it can return
1458 * _DROPPED from ::finish() and all other subclasses should have
1459 * decoded/flushed all remaining data before this
1461 * For FLUSH_STOP this is required because it is expected
1462 * to be forwarded immediately and no buffers are queued anyway.
1465 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1466 ret = gst_pad_push_event (parse->srcpad, event);
1468 parse->priv->pending_events =
1469 g_list_prepend (parse->priv->pending_events, event);
1474 GST_DEBUG_OBJECT (parse, "event handled");
1480 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1485 pad = GST_BASE_PARSE_SINK_PAD (parse);
1487 switch (GST_QUERY_TYPE (query)) {
1488 case GST_QUERY_CAPS:
1490 GstBaseParseClass *bclass;
1492 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1494 if (bclass->get_sink_caps) {
1495 GstCaps *caps, *filter;
1497 gst_query_parse_caps (query, &filter);
1498 caps = bclass->get_sink_caps (parse, filter);
1499 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1501 gst_query_set_caps_result (query, caps);
1502 gst_caps_unref (caps);
1506 GstCaps *caps, *template_caps, *filter;
1508 gst_query_parse_caps (query, &filter);
1509 template_caps = gst_pad_get_pad_template_caps (pad);
1510 if (filter != NULL) {
1512 gst_caps_intersect_full (filter, template_caps,
1513 GST_CAPS_INTERSECT_FIRST);
1514 gst_caps_unref (template_caps);
1516 caps = template_caps;
1518 gst_query_set_caps_result (query, caps);
1519 gst_caps_unref (caps);
1527 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1536 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1538 GstBaseParseClass *bclass;
1539 GstBaseParse *parse;
1542 parse = GST_BASE_PARSE (parent);
1543 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1545 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1547 if (bclass->sink_query)
1548 ret = bclass->sink_query (parse, query);
1552 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1553 GST_QUERY_TYPE_NAME (query), ret, query);
1559 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1561 GstBaseParseClass *bclass;
1562 GstBaseParse *parse;
1565 parse = GST_BASE_PARSE (parent);
1566 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1568 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1569 GST_QUERY_TYPE_NAME (query), query);
1571 if (bclass->src_query)
1572 ret = bclass->src_query (parse, query);
1576 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1577 GST_QUERY_TYPE_NAME (query), ret, query);
1582 /* gst_base_parse_src_event:
1583 * @pad: #GstPad that received the event.
1584 * @event: #GstEvent that was received.
1586 * Handler for source pad events.
1588 * Returns: %TRUE if the event was handled.
1591 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1593 GstBaseParse *parse;
1594 GstBaseParseClass *bclass;
1595 gboolean ret = TRUE;
1597 parse = GST_BASE_PARSE (parent);
1598 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1600 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1601 GST_EVENT_TYPE_NAME (event));
1603 if (bclass->src_event)
1604 ret = bclass->src_event (parse, event);
1606 gst_event_unref (event);
1612 gst_base_parse_is_seekable (GstBaseParse * parse)
1614 /* FIXME: could do more here, e.g. check index or just send data from 0
1615 * in pull mode and let decoder/sink clip */
1616 return parse->priv->syncable;
1619 /* gst_base_parse_src_event_default:
1620 * @parse: #GstBaseParse.
1621 * @event: #GstEvent that was received.
1623 * Default srcpad event handler.
1625 * Returns: %TRUE if the event was handled and can be dropped.
1628 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1630 gboolean res = FALSE;
1632 switch (GST_EVENT_TYPE (event)) {
1633 case GST_EVENT_SEEK:
1634 if (gst_base_parse_is_seekable (parse))
1635 res = gst_base_parse_handle_seek (parse, event);
1638 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1647 * gst_base_parse_convert_default:
1648 * @parse: #GstBaseParse.
1649 * @src_format: #GstFormat describing the source format.
1650 * @src_value: Source value to be converted.
1651 * @dest_format: #GstFormat defining the converted format.
1652 * @dest_value: Pointer where the conversion result will be put.
1654 * Default implementation of "convert" vmethod in #GstBaseParse class.
1656 * Returns: %TRUE if conversion was successful.
1659 gst_base_parse_convert_default (GstBaseParse * parse,
1660 GstFormat src_format,
1661 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1663 gboolean ret = FALSE;
1664 guint64 bytes, duration;
1666 if (G_UNLIKELY (src_format == dest_format)) {
1667 *dest_value = src_value;
1671 if (G_UNLIKELY (src_value == -1)) {
1676 if (G_UNLIKELY (src_value == 0)) {
1681 if (parse->priv->upstream_format != GST_FORMAT_BYTES) {
1682 /* don't do byte format conversions if we're not really parsing
1683 * a raw elementary stream, since we don't really have BYTES
1684 * position / duration info */
1685 if (src_format == GST_FORMAT_BYTES || dest_format == GST_FORMAT_BYTES)
1686 goto no_slaved_conversions;
1689 /* need at least some frames */
1690 if (!parse->priv->framecount)
1693 duration = parse->priv->acc_duration / GST_MSECOND;
1694 bytes = parse->priv->bytecount;
1696 if (G_UNLIKELY (!duration || !bytes))
1697 goto no_duration_bytes;
1699 if (src_format == GST_FORMAT_BYTES) {
1700 if (dest_format == GST_FORMAT_TIME) {
1701 /* BYTES -> TIME conversion */
1702 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1703 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1704 *dest_value *= GST_MSECOND;
1705 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1706 *dest_value / GST_MSECOND);
1709 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1711 } else if (src_format == GST_FORMAT_TIME) {
1712 if (dest_format == GST_FORMAT_BYTES) {
1713 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1714 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1716 GST_DEBUG_OBJECT (parse,
1717 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1718 src_value / GST_MSECOND, *dest_value);
1721 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1723 } else if (src_format == GST_FORMAT_DEFAULT) {
1724 /* DEFAULT == frame-based */
1725 if (dest_format == GST_FORMAT_TIME) {
1726 GST_DEBUG_OBJECT (parse, "converting default -> time");
1727 if (parse->priv->fps_den) {
1728 *dest_value = gst_util_uint64_scale (src_value,
1729 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1733 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1736 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1743 GST_DEBUG_OBJECT (parse, "no framecount");
1748 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1749 G_GUINT64_FORMAT, duration, bytes);
1752 no_slaved_conversions:
1754 GST_DEBUG_OBJECT (parse,
1755 "Can't do format conversions when upstream format is not BYTES");
1761 gst_base_parse_update_duration (GstBaseParse * parse)
1763 gint64 ptot, dest_value;
1765 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1768 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1769 GST_FORMAT_TIME, &dest_value))
1772 /* inform if duration changed, but try to avoid spamming */
1773 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1775 parse->priv->estimated_duration = dest_value;
1776 GST_LOG_OBJECT (parse,
1777 "updated estimated duration to %" GST_TIME_FORMAT,
1778 GST_TIME_ARGS (dest_value));
1780 if (parse->priv->estimated_drift > GST_SECOND ||
1781 parse->priv->estimated_drift < -GST_SECOND) {
1782 gst_element_post_message (GST_ELEMENT (parse),
1783 gst_message_new_duration_changed (GST_OBJECT (parse)));
1784 parse->priv->estimated_drift = 0;
1788 /* gst_base_parse_update_bitrates:
1789 * @parse: #GstBaseParse.
1790 * @buffer: Current frame as a #GstBuffer
1792 * Keeps track of the minimum and maximum bitrates, and also maintains a
1793 * running average bitrate of the stream so far.
1796 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1798 guint64 data_len, frame_dur;
1799 gint overhead, frame_bitrate;
1800 GstBuffer *buffer = frame->buffer;
1802 overhead = frame->overhead;
1806 data_len = gst_buffer_get_size (buffer) - overhead;
1807 parse->priv->data_bytecount += data_len;
1809 /* duration should be valid by now,
1810 * either set by subclass or maybe based on fps settings */
1811 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1812 /* Calculate duration of a frame from buffer properties */
1813 frame_dur = GST_BUFFER_DURATION (buffer);
1814 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1815 parse->priv->acc_duration;
1818 /* No way to figure out frame duration (is this even possible?) */
1822 /* override if subclass provided bitrate, e.g. metadata based */
1823 if (parse->priv->bitrate) {
1824 parse->priv->avg_bitrate = parse->priv->bitrate;
1825 /* spread this (confirmed) info ASAP */
1826 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1827 parse->priv->tags_changed = TRUE;
1831 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1835 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1836 parse->priv->avg_bitrate);
1838 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1841 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1842 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1843 || parse->priv->post_max_bitrate))
1844 parse->priv->tags_changed = TRUE;
1846 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1847 if (frame_bitrate < parse->priv->min_bitrate) {
1848 parse->priv->min_bitrate = frame_bitrate;
1849 if (parse->priv->post_min_bitrate)
1850 parse->priv->tags_changed = TRUE;
1853 if (frame_bitrate > parse->priv->max_bitrate) {
1854 parse->priv->max_bitrate = frame_bitrate;
1855 if (parse->priv->post_max_bitrate)
1856 parse->priv->tags_changed = TRUE;
1859 /* Only update the tag on a 2% change */
1860 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1861 guint64 diffprev = gst_util_uint64_scale_int (100,
1862 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1863 parse->priv->avg_bitrate);
1864 if (diffprev >= UPDATE_THRESHOLD)
1865 parse->priv->tags_changed = TRUE;
1871 * gst_base_parse_add_index_entry:
1872 * @parse: #GstBaseParse.
1873 * @offset: offset of entry
1874 * @ts: timestamp associated with offset
1875 * @key: whether entry refers to keyframe
1876 * @force: add entry disregarding sanity checks
1878 * Adds an entry to the index associating @offset to @ts. It is recommended
1879 * to only add keyframe entries. @force allows to bypass checks, such as
1880 * whether the stream is (upstream) seekable, another entry is already "close"
1881 * to the new entry, etc.
1883 * Returns: #gboolean indicating whether entry was added
1886 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1887 GstClockTime ts, gboolean key, gboolean force)
1889 gboolean ret = FALSE;
1890 GstIndexAssociation associations[2];
1892 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1893 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1895 if (G_LIKELY (!force)) {
1897 if (!parse->priv->upstream_seekable) {
1898 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1902 /* FIXME need better helper data structure that handles these issues
1903 * related to ongoing collecting of index entries */
1904 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1906 GST_LOG_OBJECT (parse,
1907 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1908 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1912 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1913 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1914 parse->priv->idx_interval) {
1915 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1916 GST_TIME_ARGS (parse->priv->index_last_ts));
1920 /* if last is not really the last one */
1921 if (!parse->priv->index_last_valid) {
1922 GstClockTime prev_ts;
1924 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1925 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1926 GST_LOG_OBJECT (parse,
1927 "entry too close to existing entry %" GST_TIME_FORMAT,
1928 GST_TIME_ARGS (prev_ts));
1929 parse->priv->index_last_offset = offset;
1930 parse->priv->index_last_ts = ts;
1936 associations[0].format = GST_FORMAT_TIME;
1937 associations[0].value = ts;
1938 associations[1].format = GST_FORMAT_BYTES;
1939 associations[1].value = offset;
1941 /* index might change on-the-fly, although that would be nutty app ... */
1942 GST_BASE_PARSE_INDEX_LOCK (parse);
1943 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1944 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1945 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1946 (const GstIndexAssociation *) &associations);
1947 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1950 parse->priv->index_last_offset = offset;
1951 parse->priv->index_last_ts = ts;
1960 /* check for seekable upstream, above and beyond a mere query */
1962 gst_base_parse_check_seekability (GstBaseParse * parse)
1965 gboolean seekable = FALSE;
1966 gint64 start = -1, stop = -1;
1967 guint idx_interval = 0;
1968 guint64 idx_byte_interval = 0;
1970 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1971 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1972 GST_DEBUG_OBJECT (parse, "seeking query failed");
1976 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1978 /* try harder to query upstream size if we didn't get it the first time */
1979 if (seekable && stop == -1) {
1980 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1981 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1984 /* if upstream doesn't know the size, it's likely that it's not seekable in
1985 * practice even if it technically may be seekable */
1986 if (seekable && (start != 0 || stop <= start)) {
1987 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1991 /* let's not put every single frame into our index */
1993 if (stop < 10 * 1024 * 1024)
1995 else if (stop < 100 * 1024 * 1024)
1998 idx_interval = 1000;
2000 /* ensure that even for large files (e.g. very long audio files), the index
2001 * stays reasonably-size, with some arbitrary limit to the total number of
2003 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
2004 GST_DEBUG_OBJECT (parse,
2005 "Limiting index entries to %d, indexing byte interval %"
2006 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
2010 gst_query_unref (query);
2012 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
2013 G_GUINT64_FORMAT ")", seekable, start, stop);
2014 parse->priv->upstream_seekable = seekable;
2015 parse->priv->upstream_size = seekable ? stop : 0;
2017 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
2018 parse->priv->idx_interval = idx_interval * GST_MSECOND;
2019 parse->priv->idx_byte_interval = idx_byte_interval;
2022 /* some misc checks on upstream */
2024 gst_base_parse_check_upstream (GstBaseParse * parse)
2028 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
2029 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
2030 /* upstream has one, accept it also, and no further updates */
2031 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
2032 parse->priv->upstream_has_duration = TRUE;
2035 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
2036 parse->priv->upstream_has_duration);
2039 /* checks src caps to determine if dealing with audio or video */
2040 /* TODO maybe forego automagic stuff and let subclass configure it ? */
2042 gst_base_parse_check_media (GstBaseParse * parse)
2047 caps = gst_pad_get_current_caps (parse->srcpad);
2048 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
2049 parse->priv->is_video =
2050 g_str_has_prefix (gst_structure_get_name (s), "video");
2052 /* historical default */
2053 parse->priv->is_video = FALSE;
2056 gst_caps_unref (caps);
2058 parse->priv->checked_media = TRUE;
2059 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
2062 /* takes ownership of frame */
2064 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2066 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2067 /* frame allocated on the heap, we can just take ownership */
2068 g_queue_push_tail (&parse->priv->queued_frames, frame);
2069 GST_TRACE ("queued frame %p", frame);
2071 GstBaseParseFrame *copy;
2073 /* probably allocated on the stack, must make a proper copy */
2074 copy = gst_base_parse_frame_copy (frame);
2075 g_queue_push_tail (&parse->priv->queued_frames, copy);
2076 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2077 gst_base_parse_frame_free (frame);
2081 /* makes sure that @buf is properly prepared and decorated for passing
2082 * to baseclass, and an equally setup frame is returned setup with @buf.
2083 * Takes ownership of @buf. */
2084 static GstBaseParseFrame *
2085 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2087 GstBaseParseFrame *frame = NULL;
2089 buffer = gst_buffer_make_writable (buffer);
2091 GST_LOG_OBJECT (parse,
2092 "preparing frame at offset %" G_GUINT64_FORMAT
2093 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2094 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2095 gst_buffer_get_size (buffer));
2097 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2099 gst_base_parse_update_flags (parse);
2101 frame = gst_base_parse_frame_new (buffer, 0, 0);
2102 gst_buffer_unref (buffer);
2103 gst_base_parse_update_frame (parse, frame);
2105 /* clear flags for next frame */
2106 parse->priv->discont = FALSE;
2107 parse->priv->new_frame = FALSE;
2109 /* use default handler to provide initial (upstream) metadata */
2110 gst_base_parse_parse_frame (parse, frame);
2115 /* Wraps buffer in a frame and dispatches to subclass.
2116 * Also manages data skipping and offset handling (including adapter flushing).
2117 * Takes ownership of @buffer */
2118 static GstFlowReturn
2119 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2120 gint * skip, gint * flushed)
2122 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2123 GstBaseParseFrame *frame;
2126 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2128 GST_LOG_OBJECT (parse,
2129 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2130 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2131 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2132 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2133 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2135 /* track what is being flushed during this single round of frame processing */
2136 parse->priv->flushed = 0;
2139 /* make it easy for _finish_frame to pick up input data */
2140 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2141 gst_buffer_ref (buffer);
2142 gst_adapter_push (parse->priv->adapter, buffer);
2145 frame = gst_base_parse_prepare_frame (parse, buffer);
2146 ret = klass->handle_frame (parse, frame, skip);
2148 *flushed = parse->priv->flushed;
2150 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2153 /* subclass can only do one of these, or semantics are too unclear */
2154 g_assert (*skip == 0 || *flushed == 0);
2156 /* track skipping */
2158 GstClockTime pts, dts;
2161 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2162 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2163 /* reverse playback, and no frames found yet, so we are skipping
2164 * the leading part of a fragment, which may form the tail of
2165 * fragment coming later, hopefully subclass skips efficiently ... */
2166 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2167 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2168 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2169 outbuf = gst_buffer_make_writable (outbuf);
2170 GST_BUFFER_PTS (outbuf) = pts;
2171 GST_BUFFER_DTS (outbuf) = dts;
2172 parse->priv->buffers_head =
2173 g_slist_prepend (parse->priv->buffers_head, outbuf);
2176 /* If we're asked to skip more than is available in the adapter,
2177 we need to remember what we need to skip for next iteration */
2178 gsize av = gst_adapter_available (parse->priv->adapter);
2179 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2181 gst_adapter_flush (parse->priv->adapter, *skip);
2184 ("This is more than available, flushing %" G_GSIZE_FORMAT
2185 ", storing %u to skip", av, (guint) (*skip - av));
2186 parse->priv->skip = *skip - av;
2187 gst_adapter_flush (parse->priv->adapter, av);
2191 if (!parse->priv->discont)
2192 parse->priv->sync_offset = parse->priv->offset;
2193 parse->priv->offset += *skip;
2194 parse->priv->discont = TRUE;
2195 /* check for indefinite skipping */
2196 if (ret == GST_FLOW_OK)
2197 ret = gst_base_parse_check_sync (parse);
2200 parse->priv->offset += *flushed;
2202 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2203 gst_adapter_clear (parse->priv->adapter);
2206 if (*skip == 0 && *flushed == 0) {
2207 /* Carry over discont if we need more data */
2208 if (GST_BUFFER_IS_DISCONT (frame->buffer))
2209 parse->priv->discont = TRUE;
2212 gst_base_parse_frame_free (frame);
2217 /* gst_base_parse_push_pending_events:
2218 * @parse: #GstBaseParse
2220 * Pushes the pending events
2223 gst_base_parse_push_pending_events (GstBaseParse * parse)
2225 if (G_UNLIKELY (parse->priv->pending_events)) {
2226 GList *r = g_list_reverse (parse->priv->pending_events);
2229 parse->priv->pending_events = NULL;
2230 for (l = r; l != NULL; l = l->next) {
2231 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2237 /* gst_base_parse_handle_and_push_frame:
2238 * @parse: #GstBaseParse.
2239 * @klass: #GstBaseParseClass.
2240 * @frame: (transfer full): a #GstBaseParseFrame
2242 * Parses the frame from given buffer and pushes it forward. Also performs
2243 * timestamp handling and checks the segment limits.
2245 * This is called with srcpad STREAM_LOCK held.
2247 * Returns: #GstFlowReturn
2249 static GstFlowReturn
2250 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2251 GstBaseParseFrame * frame)
2256 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2258 buffer = frame->buffer;
2259 offset = frame->offset;
2261 /* check if subclass/format can provide ts.
2262 * If so, that allows and enables extra seek and duration determining options */
2263 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2264 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2265 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2266 parse->priv->first_frame_offset = offset;
2267 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2268 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2269 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2270 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2271 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2272 GST_TIME_ARGS (parse->priv->first_frame_pts),
2273 parse->priv->first_frame_offset);
2274 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2276 GstClockTime last_ts = G_MAXINT64;
2278 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2279 gst_base_parse_locate_time (parse, &last_ts, &off);
2280 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2281 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2284 /* disable further checks */
2285 parse->priv->first_frame_offset = 0;
2289 /* track upstream time if provided, not subclass' internal notion of it */
2290 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2291 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2292 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2295 /* interpolating and no valid pts yet,
2296 * start with dts and carry on from there */
2297 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2298 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2299 parse->priv->next_pts = parse->priv->next_dts;
2301 /* again use default handler to add missing metadata;
2302 * we may have new information on frame properties */
2303 gst_base_parse_parse_frame (parse, frame);
2305 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2306 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2307 parse->priv->next_dts =
2308 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2309 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2310 GstClockTime next_pts =
2311 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2312 if (next_pts >= parse->priv->next_dts)
2313 parse->priv->next_pts = next_pts;
2316 /* we lost track, do not produce bogus time next time around
2317 * (probably means parser subclass has given up on parsing as well) */
2318 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2319 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2322 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2323 GST_BUFFER_PTS_IS_VALID (buffer))
2324 gst_base_parse_add_index_entry (parse, offset,
2325 GST_BUFFER_PTS (buffer),
2326 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2328 /* All OK, push queued frames if there are any */
2329 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2330 GstBaseParseFrame *queued_frame;
2332 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2333 gst_base_parse_push_frame (parse, queued_frame);
2334 gst_base_parse_frame_free (queued_frame);
2338 return gst_base_parse_push_frame (parse, frame);
2342 * gst_base_parse_push_frame:
2343 * @parse: #GstBaseParse.
2344 * @frame: (transfer none): a #GstBaseParseFrame
2346 * Pushes the frame's buffer downstream, sends any pending events and
2347 * does some timestamp and segment handling. Takes ownership of
2348 * frame's buffer, though caller retains ownership of @frame.
2350 * This must be called with sinkpad STREAM_LOCK held.
2352 * Returns: #GstFlowReturn
2355 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2357 GstFlowReturn ret = GST_FLOW_OK;
2358 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2359 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2360 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2364 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2365 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2367 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2369 buffer = frame->buffer;
2371 GST_LOG_OBJECT (parse,
2372 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2373 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2374 gst_buffer_get_size (buffer),
2375 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2376 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2377 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2380 parse->priv->bytecount += frame->size;
2381 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2382 parse->priv->framecount++;
2383 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2384 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2387 /* 0 means disabled */
2388 if (parse->priv->update_interval < 0)
2389 parse->priv->update_interval = 50;
2390 else if (parse->priv->update_interval > 0 &&
2391 (parse->priv->framecount % parse->priv->update_interval) == 0)
2392 gst_base_parse_update_duration (parse);
2394 if (GST_BUFFER_PTS_IS_VALID (buffer))
2395 last_start = last_stop = GST_BUFFER_PTS (buffer);
2396 if (last_start != GST_CLOCK_TIME_NONE
2397 && GST_BUFFER_DURATION_IS_VALID (buffer))
2398 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2400 /* should have caps by now */
2401 if (!gst_pad_has_current_caps (parse->srcpad))
2404 if (G_UNLIKELY (!parse->priv->checked_media)) {
2405 /* have caps; check identity */
2406 gst_base_parse_check_media (parse);
2409 if (parse->priv->tags_changed) {
2410 gst_base_parse_queue_tag_event_update (parse);
2411 parse->priv->tags_changed = FALSE;
2414 /* Push pending events, including SEGMENT events */
2415 gst_base_parse_push_pending_events (parse);
2417 /* segment adjustment magic; only if we are running the whole show */
2418 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2419 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2420 parse->priv->upstream_seekable)) {
2422 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2423 GST_CLOCK_TIME_IS_VALID (last_start)) {
2424 GstClockTimeDiff diff;
2426 /* only send newsegments with increasing start times,
2427 * otherwise if these go back and forth downstream (sinks) increase
2428 * accumulated time and running_time */
2429 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2430 if (G_UNLIKELY (diff > 2 * GST_SECOND
2431 && last_start > parse->segment.start
2432 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2433 || last_start < parse->segment.stop))) {
2435 GST_DEBUG_OBJECT (parse,
2436 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2437 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2438 "Sending updated SEGMENT events", diff,
2439 GST_TIME_ARGS (parse->segment.position),
2440 GST_TIME_ARGS (last_start));
2442 /* skip gap FIXME */
2443 gst_pad_push_event (parse->srcpad,
2444 gst_event_new_segment (&parse->segment));
2446 parse->segment.position = last_start;
2451 /* update bitrates and optionally post corresponding tags
2452 * (following newsegment) */
2453 gst_base_parse_update_bitrates (parse, frame);
2455 if (klass->pre_push_frame) {
2456 ret = klass->pre_push_frame (parse, frame);
2458 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2461 /* Push pending events, if there are any new ones
2462 * like tags added by pre_push_frame */
2463 if (parse->priv->tags_changed) {
2464 gst_base_parse_queue_tag_event_update (parse);
2465 parse->priv->tags_changed = FALSE;
2467 gst_base_parse_push_pending_events (parse);
2469 /* take final ownership of frame buffer */
2470 if (frame->out_buffer) {
2471 buffer = frame->out_buffer;
2472 frame->out_buffer = NULL;
2473 gst_buffer_replace (&frame->buffer, NULL);
2475 buffer = frame->buffer;
2476 frame->buffer = NULL;
2479 /* subclass must play nice */
2480 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2482 size = gst_buffer_get_size (buffer);
2484 parse->priv->seen_keyframe |= parse->priv->is_video &&
2485 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2487 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2488 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2489 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2490 GST_BUFFER_TIMESTAMP (buffer) >
2491 parse->segment.stop + parse->priv->lead_out_ts) {
2492 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2494 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2495 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2496 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2497 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2498 parse->priv->lead_in_ts < parse->segment.start) {
2499 if (parse->priv->seen_keyframe) {
2500 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2503 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2504 ret = GST_BASE_PARSE_FLOW_DROPPED;
2511 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2512 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2513 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
2514 parse->priv->discont = TRUE;
2515 gst_buffer_unref (buffer);
2517 } else if (ret == GST_FLOW_OK) {
2518 if (parse->segment.rate > 0.0) {
2519 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2521 ret = gst_pad_push (parse->srcpad, buffer);
2522 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2523 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2525 /* in backwards playback mode, if on passthrough we need to push buffers
2526 * directly without accumulating them into the buffers_queued as baseparse
2527 * will never check for a DISCONT while on passthrough and those buffers
2528 * will never be pushed.
2530 * also, as we are on reverse playback, it might be possible that
2531 * passthrough might have just been enabled, so make sure to drain the
2532 * buffers_queued list */
2533 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2534 gst_base_parse_finish_fragment (parse, TRUE);
2535 ret = gst_base_parse_send_buffers (parse);
2538 if (ret == GST_FLOW_OK) {
2539 GST_LOG_OBJECT (parse,
2540 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2541 ret = gst_pad_push (parse->srcpad, buffer);
2542 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2543 gst_flow_get_name (ret));
2545 GST_LOG_OBJECT (parse,
2546 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2547 gst_flow_get_name (ret));
2548 gst_buffer_unref (buffer);
2552 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2554 parse->priv->buffers_queued =
2555 g_slist_prepend (parse->priv->buffers_queued, buffer);
2559 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2560 size, gst_flow_get_name (ret));
2561 gst_buffer_unref (buffer);
2562 /* if we are not sufficiently in control, let upstream decide on EOS */
2563 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2564 (parse->priv->passthrough ||
2565 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2566 !parse->priv->upstream_seekable)))
2570 /* Update current running segment position */
2571 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2572 && last_stop != GST_CLOCK_TIME_NONE
2573 && parse->segment.position < last_stop)
2574 parse->segment.position = last_stop;
2581 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2582 return GST_FLOW_FLUSHING;
2584 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2585 return GST_FLOW_ERROR;
2590 * gst_base_parse_finish_frame:
2591 * @parse: a #GstBaseParse
2592 * @frame: a #GstBaseParseFrame
2593 * @size: consumed input data represented by frame
2595 * Collects parsed data and pushes this downstream.
2596 * Source pad caps must be set when this is called.
2598 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2599 * Otherwise, @size samples will be taken from the input and used for output,
2600 * and the output's metadata (timestamps etc) will be taken as (optionally)
2601 * set by the subclass on @frame's (input) buffer (which is otherwise
2602 * ignored for any but the above purpose/information).
2604 * Note that the latter buffer is invalidated by this call, whereas the
2605 * caller retains ownership of @frame.
2607 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2610 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2613 GstFlowReturn ret = GST_FLOW_OK;
2615 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2616 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2617 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2618 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2621 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2622 "flushing size %d", frame->offset, size);
2624 /* some one-time start-up */
2625 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2626 gst_base_parse_check_seekability (parse);
2627 gst_base_parse_check_upstream (parse);
2630 parse->priv->flushed += size;
2632 if (parse->priv->scanning && frame->buffer) {
2633 if (!parse->priv->scanned_frame) {
2634 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2639 /* either PUSH or PULL mode arranges for adapter data */
2640 /* ensure output buffer */
2641 if (!frame->out_buffer) {
2642 GstBuffer *src, *dest;
2644 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2645 dest = frame->out_buffer;
2646 src = frame->buffer;
2647 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2648 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2649 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2650 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2651 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2652 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2654 gst_adapter_flush (parse->priv->adapter, size);
2657 /* use as input for subsequent processing */
2658 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2659 gst_buffer_unref (frame->out_buffer);
2660 frame->out_buffer = NULL;
2662 /* mark input size consumed */
2665 /* subclass might queue frames/data internally if it needs more
2666 * frames to decide on the format, or might request us to queue here. */
2667 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2668 gst_buffer_replace (&frame->buffer, NULL);
2670 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2671 GstBaseParseFrame *copy;
2673 copy = gst_base_parse_frame_copy (frame);
2674 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2675 gst_base_parse_queue_frame (parse, copy);
2679 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2686 * gst_base_parse_drain:
2687 * @parse: a #GstBaseParse
2689 * Drains the adapter until it is empty. It decreases the min_frame_size to
2690 * match the current adapter size and calls chain method until the adapter
2691 * is emptied or chain returns with error.
2696 gst_base_parse_drain (GstBaseParse * parse)
2700 GST_DEBUG_OBJECT (parse, "draining");
2701 parse->priv->drain = TRUE;
2704 avail = gst_adapter_available (parse->priv->adapter);
2708 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2709 NULL) != GST_FLOW_OK) {
2713 /* nothing changed, maybe due to truncated frame; break infinite loop */
2714 if (avail == gst_adapter_available (parse->priv->adapter)) {
2715 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2716 gst_adapter_clear (parse->priv->adapter);
2720 parse->priv->drain = FALSE;
2723 /* gst_base_parse_send_buffers
2725 * Sends buffers collected in send_buffers downstream, and ensures that list
2726 * is empty at the end (errors or not).
2728 static GstFlowReturn
2729 gst_base_parse_send_buffers (GstBaseParse * parse)
2731 GSList *send = NULL;
2733 GstFlowReturn ret = GST_FLOW_OK;
2734 gboolean first = TRUE;
2736 send = parse->priv->buffers_send;
2740 buf = GST_BUFFER_CAST (send->data);
2741 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2742 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2743 ", offset %" G_GINT64_FORMAT, buf,
2744 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2745 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2746 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2748 /* Make sure the first buffer is always DISCONT. If we split
2749 * GOPs inside the parser this is otherwise not guaranteed */
2751 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2754 /* likewise, subsequent buffers should never have DISCONT
2755 * according to the "reverse fragment protocol", or such would
2756 * confuse a downstream decoder
2757 * (could be DISCONT due to aggregating upstream fragments by parsing) */
2758 GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
2761 /* iterate output queue an push downstream */
2762 ret = gst_pad_push (parse->srcpad, buf);
2763 send = g_slist_delete_link (send, send);
2765 /* clear any leftover if error */
2766 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2768 buf = GST_BUFFER_CAST (send->data);
2769 gst_buffer_unref (buf);
2770 send = g_slist_delete_link (send, send);
2775 parse->priv->buffers_send = send;
2780 /* gst_base_parse_start_fragment:
2782 * Prepares for processing a reverse playback (forward) fragment
2783 * by (re)setting proper state variables.
2785 static GstFlowReturn
2786 gst_base_parse_start_fragment (GstBaseParse * parse)
2788 GST_LOG_OBJECT (parse, "starting fragment");
2790 /* invalidate so no fall-back timestamping is performed;
2791 * ok if taken from subclass or upstream */
2792 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2793 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2794 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2795 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2796 parse->priv->prev_dts_from_pts = FALSE;
2797 /* prevent it hanging around stop all the time */
2798 parse->segment.position = GST_CLOCK_TIME_NONE;
2800 parse->priv->discont = TRUE;
2802 /* head of previous fragment is now pending tail of current fragment */
2803 parse->priv->buffers_pending = parse->priv->buffers_head;
2804 parse->priv->buffers_head = NULL;
2810 /* gst_base_parse_finish_fragment:
2812 * Processes a reverse playback (forward) fragment:
2813 * - append head of last fragment that was skipped to current fragment data
2814 * - drain the resulting current fragment data (i.e. repeated chain)
2815 * - add time/duration (if needed) to frames queued by chain
2816 * - push queued data
2818 static GstFlowReturn
2819 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2822 GstFlowReturn ret = GST_FLOW_OK;
2823 gboolean seen_key = FALSE, seen_delta = FALSE;
2825 GST_LOG_OBJECT (parse, "finishing fragment");
2828 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2829 while (parse->priv->buffers_pending) {
2830 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2832 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2833 gst_buffer_get_size (buf));
2834 gst_adapter_push (parse->priv->adapter, buf);
2836 GST_LOG_OBJECT (parse, "discarding head buffer");
2837 gst_buffer_unref (buf);
2839 parse->priv->buffers_pending =
2840 g_slist_delete_link (parse->priv->buffers_pending,
2841 parse->priv->buffers_pending);
2844 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2845 /* initial skipped data is added to buffers_pending */
2846 gst_base_parse_drain (parse);
2848 if (parse->priv->buffers_send) {
2849 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2850 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2853 /* add metadata (if needed to queued buffers */
2854 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2855 GST_TIME_ARGS (parse->priv->last_pts));
2856 while (parse->priv->buffers_queued) {
2857 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2859 /* no touching if upstream or parsing provided time */
2860 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2861 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2862 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2863 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2864 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2865 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2866 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2868 parse->priv->last_pts = 0;
2869 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2870 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2871 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2873 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2874 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2875 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2877 parse->priv->last_dts = 0;
2878 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2879 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2880 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2883 /* no idea, very bad */
2884 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2887 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2888 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2890 /* reverse order for ascending sending */
2891 /* send downstream at keyframe not preceded by a keyframe
2892 * (e.g. that should identify start of collection of IDR nals) */
2893 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2895 ret = gst_base_parse_send_buffers (parse);
2896 /* if a problem, throw all to sending */
2897 if (ret != GST_FLOW_OK) {
2898 parse->priv->buffers_send =
2899 g_slist_reverse (parse->priv->buffers_queued);
2900 parse->priv->buffers_queued = NULL;
2910 parse->priv->buffers_send =
2911 g_slist_prepend (parse->priv->buffers_send, buf);
2912 parse->priv->buffers_queued =
2913 g_slist_delete_link (parse->priv->buffers_queued,
2914 parse->priv->buffers_queued);
2917 /* audio may have all marked as keyframe, so arrange to send here. Also
2918 * we might have ended the loop above on a keyframe, in which case we
2920 if (!seen_delta || seen_key)
2921 ret = gst_base_parse_send_buffers (parse);
2923 /* any trailing unused no longer usable (ideally none) */
2924 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2925 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2926 gst_adapter_available (parse->priv->adapter));
2927 gst_adapter_clear (parse->priv->adapter);
2933 /* small helper that checks whether we have been trying to resync too long */
2934 static inline GstFlowReturn
2935 gst_base_parse_check_sync (GstBaseParse * parse)
2937 if (G_UNLIKELY (parse->priv->discont &&
2938 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2939 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2940 ("Failed to parse stream"), (NULL));
2941 return GST_FLOW_ERROR;
2947 static GstFlowReturn
2948 gst_base_parse_process_streamheader (GstBaseParse * parse)
2952 const GValue *value;
2953 GstFlowReturn ret = GST_FLOW_OK;
2955 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2959 str = gst_caps_get_structure (caps, 0);
2960 value = gst_structure_get_value (str, "streamheader");
2964 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2966 if (GST_VALUE_HOLDS_ARRAY (value)) {
2968 gsize len = gst_value_array_get_size (value);
2970 for (i = 0; i < len; i++) {
2972 gst_value_get_buffer (gst_value_array_get_value (value, i));
2974 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2975 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2978 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2979 GstBuffer *buffer = gst_value_get_buffer (value);
2981 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2982 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2985 gst_caps_unref (caps);
2992 gst_caps_unref (caps);
2995 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
3000 static GstFlowReturn
3001 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
3003 GstBaseParseClass *bclass;
3004 GstBaseParse *parse;
3005 GstFlowReturn ret = GST_FLOW_OK;
3006 GstFlowReturn old_ret = GST_FLOW_OK;
3007 GstBuffer *tmpbuf = NULL;
3011 GstClockTime pts, dts;
3013 parse = GST_BASE_PARSE (parent);
3014 bclass = GST_BASE_PARSE_GET_CLASS (parse);
3015 GST_DEBUG_OBJECT (parent, "chain");
3017 /* early out for speed, if we need to skip */
3018 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
3019 parse->priv->skip = 0;
3020 if (parse->priv->skip > 0) {
3021 gsize bsize = gst_buffer_get_size (buffer);
3022 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
3024 if (parse->priv->skip >= bsize) {
3025 parse->priv->skip -= bsize;
3026 GST_DEBUG ("All the buffer is skipped");
3027 parse->priv->offset += bsize;
3028 parse->priv->sync_offset = parse->priv->offset;
3031 buffer = gst_buffer_make_writable (buffer);
3032 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
3033 parse->priv->offset += parse->priv->skip;
3034 GST_DEBUG ("Done skipping, we have %u left on this buffer",
3035 (unsigned) (bsize - parse->priv->skip));
3036 parse->priv->skip = 0;
3037 parse->priv->discont = TRUE;
3040 if (G_UNLIKELY (parse->priv->first_buffer)) {
3041 parse->priv->first_buffer = FALSE;
3042 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
3043 /* this stream has no header buffers, check if we just prepend the
3044 * streamheader from caps to the stream */
3045 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
3046 "prepend to the stream");
3047 gst_base_parse_process_streamheader (parse);
3049 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
3050 "streamheader from caps");
3054 if (parse->priv->detecting) {
3055 GstBuffer *detect_buf;
3057 if (parse->priv->detect_buffers_size == 0) {
3058 detect_buf = gst_buffer_ref (buffer);
3063 detect_buf = gst_buffer_new ();
3065 for (l = parse->priv->detect_buffers; l; l = l->next) {
3066 gsize tmpsize = gst_buffer_get_size (l->data);
3068 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
3069 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3073 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3074 offset, gst_buffer_get_size (buffer));
3077 ret = bclass->detect (parse, detect_buf);
3078 gst_buffer_unref (detect_buf);
3080 if (ret == GST_FLOW_OK) {
3083 /* Detected something */
3084 parse->priv->detecting = FALSE;
3086 for (l = parse->priv->detect_buffers; l; l = l->next) {
3087 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3089 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3090 parent, GST_BUFFER_CAST (l->data));
3092 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3094 g_list_free (parse->priv->detect_buffers);
3095 parse->priv->detect_buffers = NULL;
3096 parse->priv->detect_buffers_size = 0;
3098 if (ret != GST_FLOW_OK) {
3102 /* Handle the current buffer */
3103 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3104 /* Still detecting, append buffer or error out if draining */
3106 if (parse->priv->drain) {
3107 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3108 return GST_FLOW_ERROR;
3109 } else if (parse->priv->flushing) {
3110 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3112 g_list_free (parse->priv->detect_buffers);
3113 parse->priv->detect_buffers = NULL;
3114 parse->priv->detect_buffers_size = 0;
3116 parse->priv->detect_buffers =
3117 g_list_append (parse->priv->detect_buffers, buffer);
3118 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3122 /* Something went wrong, subclass responsible for error reporting */
3126 /* And now handle the current buffer if detection worked */
3129 if (G_LIKELY (buffer)) {
3130 GST_LOG_OBJECT (parse,
3131 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3132 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3133 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3134 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3135 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3137 if (G_UNLIKELY (!parse->priv->disable_passthrough
3138 && parse->priv->passthrough)) {
3139 GstBaseParseFrame frame;
3141 gst_base_parse_frame_init (&frame);
3142 frame.buffer = gst_buffer_make_writable (buffer);
3143 ret = gst_base_parse_push_frame (parse, &frame);
3144 gst_base_parse_frame_free (&frame);
3147 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3148 /* upstream feeding us in reverse playback;
3149 * finish previous fragment and start new upon DISCONT */
3150 if (parse->segment.rate < 0.0) {
3151 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3152 ret = gst_base_parse_finish_fragment (parse, TRUE);
3153 gst_base_parse_start_fragment (parse);
3155 /* discont in the stream, drain and mark discont for next output */
3156 gst_base_parse_drain (parse);
3157 parse->priv->discont = TRUE;
3160 gst_adapter_push (parse->priv->adapter, buffer);
3163 /* Parse and push as many frames as possible */
3164 /* Stop either when adapter is empty or we are flushing */
3165 while (!parse->priv->flushing) {
3167 gboolean updated_prev_pts = FALSE;
3169 /* note: if subclass indicates MAX fsize,
3170 * this will not likely be available anyway ... */
3171 min_size = MAX (parse->priv->min_frame_size, fsize);
3172 av = gst_adapter_available (parse->priv->adapter);
3174 if (G_UNLIKELY (parse->priv->drain)) {
3176 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3177 if (G_UNLIKELY (!min_size)) {
3182 /* Collect at least min_frame_size bytes */
3183 if (av < min_size) {
3184 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3188 /* move along with upstream timestamp (if any),
3189 * but interpolate in between */
3190 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3191 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3192 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts)) {
3193 parse->priv->prev_pts = parse->priv->next_pts = pts;
3194 updated_prev_pts = TRUE;
3197 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
3198 parse->priv->prev_dts = parse->priv->next_dts = dts;
3199 parse->priv->prev_dts_from_pts = FALSE;
3202 /* we can mess with, erm interpolate, timestamps,
3203 * and incoming stuff has PTS but no DTS seen so far,
3204 * then pick up DTS from PTS and hope for the best ... */
3205 if (parse->priv->infer_ts &&
3206 parse->priv->pts_interpolate &&
3207 !GST_CLOCK_TIME_IS_VALID (dts) &&
3208 (!GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts)
3209 || (parse->priv->prev_dts_from_pts && updated_prev_pts))
3210 && GST_CLOCK_TIME_IS_VALID (pts)) {
3211 parse->priv->prev_dts = parse->priv->next_dts = pts;
3212 parse->priv->prev_dts_from_pts = TRUE;
3215 /* always pass all available data */
3216 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3218 /* already inform subclass what timestamps we have planned,
3219 * at least if provided by time-based upstream */
3220 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3221 tmpbuf = gst_buffer_make_writable (tmpbuf);
3222 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3223 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3224 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3227 /* keep the adapter mapped, so keep track of what has to be flushed */
3228 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3231 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3234 if (skip == 0 && flush == 0) {
3235 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3236 "breaking to get more data");
3237 /* ignore this return as it produced no data */
3241 if (old_ret == GST_FLOW_OK)
3246 GST_LOG_OBJECT (parse, "chain leaving");
3250 /* pull @size bytes at current offset,
3251 * i.e. at least try to and possibly return a shorter buffer if near the end */
3252 static GstFlowReturn
3253 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3254 GstBuffer ** buffer)
3256 GstFlowReturn ret = GST_FLOW_OK;
3258 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3260 /* Caching here actually makes much less difference than one would expect.
3261 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3262 if (parse->priv->cache) {
3263 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3264 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3266 if (cache_offset <= parse->priv->offset &&
3267 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3268 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3269 parse->priv->offset - cache_offset, size);
3270 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3273 /* not enough data in the cache, free cache and get a new one */
3274 gst_buffer_unref (parse->priv->cache);
3275 parse->priv->cache = NULL;
3278 /* refill the cache */
3280 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3281 64 * 1024), &parse->priv->cache);
3282 if (ret != GST_FLOW_OK) {
3283 parse->priv->cache = NULL;
3287 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3289 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3291 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3295 /* Not possible to get enough data, try a last time with
3296 * requesting exactly the size we need */
3297 gst_buffer_unref (parse->priv->cache);
3298 parse->priv->cache = NULL;
3300 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3301 &parse->priv->cache);
3303 if (ret != GST_FLOW_OK) {
3304 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3309 if (gst_buffer_get_size (parse->priv->cache) < size) {
3310 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3311 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3312 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3314 *buffer = parse->priv->cache;
3315 parse->priv->cache = NULL;
3321 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3322 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3327 static GstFlowReturn
3328 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3331 GstClockTime ts = 0;
3335 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3336 ", last_offset = %" G_GINT64_FORMAT,
3337 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3339 if (!parse->priv->last_offset
3340 || parse->priv->last_pts <= parse->segment.start) {
3341 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3342 GST_TIME_ARGS (parse->segment.start));
3347 /* last fragment started at last_offset / last_ts;
3348 * seek back 10s capped at 1MB */
3349 if (parse->priv->last_pts >= 10 * GST_SECOND)
3350 ts = parse->priv->last_pts - 10 * GST_SECOND;
3351 /* if we are exact now, we will be more so going backwards */
3352 if (parse->priv->exact_position) {
3353 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3355 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3356 GST_FORMAT_BYTES, &offset)) {
3357 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3360 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3361 parse->priv->last_offset - 1024);
3362 offset = MAX (0, offset);
3364 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3366 parse->priv->offset = offset;
3368 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3370 if (ret != GST_FLOW_OK)
3373 /* offset will increase again as fragment is processed/parsed */
3374 parse->priv->last_offset = offset;
3376 gst_base_parse_start_fragment (parse);
3377 gst_adapter_push (parse->priv->adapter, buffer);
3378 ret = gst_base_parse_finish_fragment (parse, TRUE);
3379 if (ret != GST_FLOW_OK)
3382 /* force previous fragment */
3383 parse->priv->offset = -1;
3390 * pull and scan for next frame starting from current offset
3391 * ajusts sync, drain and offset going along */
3392 static GstFlowReturn
3393 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3396 GstFlowReturn ret = GST_FLOW_OK;
3397 guint fsize, min_size;
3401 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3402 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3404 /* let's make this efficient for all subclass once and for all;
3405 * maybe it does not need this much, but in the latter case, we know we are
3406 * in pull mode here and might as well try to read and supply more anyway
3407 * (so does the buffer caching mechanism) */
3411 min_size = MAX (parse->priv->min_frame_size, fsize);
3413 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3415 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3416 if (ret != GST_FLOW_OK)
3419 /* if we got a short read, inform subclass we are draining leftover
3420 * and no more is to be expected */
3421 if (gst_buffer_get_size (buffer) < min_size) {
3422 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3423 parse->priv->drain = TRUE;
3426 if (parse->priv->detecting) {
3427 ret = klass->detect (parse, buffer);
3428 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3429 /* If draining we error out, otherwise request a buffer
3431 if (parse->priv->drain) {
3432 gst_buffer_unref (buffer);
3433 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3434 return GST_FLOW_ERROR;
3437 gst_buffer_unref (buffer);
3440 } else if (ret != GST_FLOW_OK) {
3441 gst_buffer_unref (buffer);
3442 GST_ERROR_OBJECT (parse, "detect() returned %s",
3443 gst_flow_get_name (ret));
3447 /* Else handle this buffer normally */
3450 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3451 if (ret != GST_FLOW_OK)
3454 /* If a large amount of data was requested to be skipped, _handle_buffer
3455 might have set the priv->skip flag to an extra amount on top of skip.
3456 In pull mode, we can just pull from the new offset directly. */
3457 parse->priv->offset += parse->priv->skip;
3458 parse->priv->skip = 0;
3460 /* something flushed means something happened,
3461 * and we should bail out of this loop so as not to occupy
3462 * the task thread indefinitely */
3464 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3467 /* nothing flushed, no skip and draining, so nothing left to do */
3468 if (!skip && parse->priv->drain) {
3469 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3470 "breaking loop and marking EOS");
3474 /* otherwise, get some more data
3475 * note that is checked this does not happen indefinitely */
3477 GST_LOG_OBJECT (parse, "getting some more data");
3480 parse->priv->drain = FALSE;
3487 /* Loop that is used in pull mode to retrieve data from upstream */
3489 gst_base_parse_loop (GstPad * pad)
3491 GstBaseParse *parse;
3492 GstBaseParseClass *klass;
3493 GstFlowReturn ret = GST_FLOW_OK;
3495 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3496 klass = GST_BASE_PARSE_GET_CLASS (parse);
3498 GST_LOG_OBJECT (parse, "Entering parse loop");
3500 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3505 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3508 event = gst_event_new_stream_start (stream_id);
3509 gst_event_set_group_id (event, gst_util_group_id_next ());
3511 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3512 gst_pad_push_event (parse->srcpad, event);
3513 parse->priv->push_stream_start = FALSE;
3517 /* reverse playback:
3518 * first fragment (closest to stop time) is handled normally below,
3519 * then we pull in fragments going backwards */
3520 if (parse->segment.rate < 0.0) {
3521 /* check if we jumped back to a previous fragment,
3522 * which is a post-first fragment */
3523 if (parse->priv->offset < 0) {
3524 ret = gst_base_parse_handle_previous_fragment (parse);
3529 ret = gst_base_parse_scan_frame (parse, klass);
3531 /* eat expected eos signalling past segment in reverse playback */
3532 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3533 parse->segment.position >= parse->segment.stop) {
3534 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3535 /* push what was accumulated during loop run */
3536 gst_base_parse_finish_fragment (parse, FALSE);
3537 /* force previous fragment */
3538 parse->priv->offset = -1;
3542 if (ret != GST_FLOW_OK)
3546 if (ret == GST_FLOW_EOS)
3548 else if (ret != GST_FLOW_OK)
3551 gst_object_unref (parse);
3558 GST_DEBUG_OBJECT (parse, "eos");
3563 gboolean push_eos = FALSE;
3565 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3566 gst_flow_get_name (ret));
3567 gst_pad_pause_task (parse->sinkpad);
3569 if (ret == GST_FLOW_EOS) {
3570 /* handle end-of-stream/segment */
3571 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3574 if ((stop = parse->segment.stop) == -1)
3575 stop = parse->segment.duration;
3577 GST_DEBUG_OBJECT (parse, "sending segment_done");
3579 gst_element_post_message
3580 (GST_ELEMENT_CAST (parse),
3581 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3582 GST_FORMAT_TIME, stop));
3583 gst_pad_push_event (parse->srcpad,
3584 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3586 /* If we STILL have zero frames processed, fire an error */
3587 if (parse->priv->framecount == 0) {
3588 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3589 ("No valid frames found before end of stream"), (NULL));
3593 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3594 /* for fatal errors we post an error message, wrong-state is
3595 * not fatal because it happens due to flushes and only means
3596 * that we should stop now. */
3597 GST_ELEMENT_FLOW_ERROR (parse, ret);
3601 if (parse->priv->estimated_duration <= 0) {
3602 gst_base_parse_update_duration (parse);
3604 /* Push pending events, including SEGMENT events */
3605 gst_base_parse_push_pending_events (parse);
3607 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3609 gst_object_unref (parse);
3614 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3616 GstSchedulingFlags sched_flags;
3617 GstBaseParse *parse;
3621 parse = GST_BASE_PARSE (parent);
3623 GST_DEBUG_OBJECT (parse, "sink activate");
3625 query = gst_query_new_scheduling ();
3626 if (!gst_pad_peer_query (sinkpad, query)) {
3627 gst_query_unref (query);
3628 goto baseparse_push;
3631 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3633 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3634 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3636 gst_query_unref (query);
3639 goto baseparse_push;
3641 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3642 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3643 goto baseparse_push;
3645 parse->priv->push_stream_start = TRUE;
3646 /* In pull mode, upstream is BYTES */
3647 parse->priv->upstream_format = GST_FORMAT_BYTES;
3649 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3654 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3655 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3660 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3662 GstBaseParseClass *klass;
3663 gboolean result = TRUE;
3665 GST_DEBUG_OBJECT (parse, "activate %d", active);
3667 klass = GST_BASE_PARSE_GET_CLASS (parse);
3670 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3671 result = klass->start (parse);
3673 /* If the subclass implements ::detect we want to
3674 * call it for the first buffers now */
3675 parse->priv->detecting = (klass->detect != NULL);
3677 /* We must make sure streaming has finished before resetting things
3678 * and calling the ::stop vfunc */
3679 GST_PAD_STREAM_LOCK (parse->sinkpad);
3680 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3682 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3683 result = klass->stop (parse);
3685 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3686 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
3688 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3693 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3694 GstPadMode mode, gboolean active)
3697 GstBaseParse *parse;
3699 parse = GST_BASE_PARSE (parent);
3701 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3702 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3704 if (!gst_base_parse_activate (parse, active))
3705 goto activate_failed;
3708 case GST_PAD_MODE_PULL:
3710 parse->priv->pending_events =
3711 g_list_prepend (parse->priv->pending_events,
3712 gst_event_new_segment (&parse->segment));
3715 result = gst_pad_stop_task (pad);
3723 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3725 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3732 GST_DEBUG_OBJECT (parse, "activate failed");
3738 * gst_base_parse_set_duration:
3739 * @parse: #GstBaseParse.
3741 * @duration: duration value.
3742 * @interval: how often to update the duration estimate based on bitrate, or 0.
3744 * Sets the duration of the currently playing media. Subclass can use this
3745 * when it is able to determine duration and/or notices a change in the media
3746 * duration. Alternatively, if @interval is non-zero (default), then stream
3747 * duration is determined based on estimated bitrate, and updated every @interval
3751 gst_base_parse_set_duration (GstBaseParse * parse,
3752 GstFormat fmt, gint64 duration, gint interval)
3754 g_return_if_fail (parse != NULL);
3756 if (parse->priv->upstream_has_duration) {
3757 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3761 if (duration != parse->priv->duration) {
3764 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3765 gst_element_post_message (GST_ELEMENT (parse), m);
3767 /* TODO: what about duration tag? */
3769 parse->priv->duration = duration;
3770 parse->priv->duration_fmt = fmt;
3771 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3772 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3773 if (interval != 0) {
3774 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3778 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3779 parse->priv->update_interval = interval;
3785 * gst_base_parse_set_average_bitrate:
3786 * @parse: #GstBaseParse.
3787 * @bitrate: average bitrate in bits/second
3789 * Optionally sets the average bitrate detected in media (if non-zero),
3790 * e.g. based on metadata, as it will be posted to the application.
3792 * By default, announced average bitrate is estimated. The average bitrate
3793 * is used to estimate the total duration of the stream and to estimate
3794 * a seek position, if there's no index and the format is syncable
3795 * (see gst_base_parse_set_syncable()).
3798 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3800 parse->priv->bitrate = bitrate;
3801 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3805 * gst_base_parse_set_min_frame_size:
3806 * @parse: #GstBaseParse.
3807 * @min_size: Minimum size of the data that this base class should give to
3810 * Subclass can use this function to tell the base class that it needs to
3811 * give at least #min_size buffers.
3814 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3816 g_return_if_fail (parse != NULL);
3818 parse->priv->min_frame_size = min_size;
3819 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3823 * gst_base_parse_set_frame_rate:
3824 * @parse: the #GstBaseParse to set
3825 * @fps_num: frames per second (numerator).
3826 * @fps_den: frames per second (denominator).
3827 * @lead_in: frames needed before a segment for subsequent decode
3828 * @lead_out: frames needed after a segment
3830 * If frames per second is configured, parser can take care of buffer duration
3831 * and timestamping. When performing segment clipping, or seeking to a specific
3832 * location, a corresponding decoder might need an initial @lead_in and a
3833 * following @lead_out number of frames to ensure the desired segment is
3834 * entirely filled upon decoding.
3837 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3838 guint fps_den, guint lead_in, guint lead_out)
3840 g_return_if_fail (parse != NULL);
3842 parse->priv->fps_num = fps_num;
3843 parse->priv->fps_den = fps_den;
3844 if (!fps_num || !fps_den) {
3845 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3847 fps_num = fps_den = 0;
3848 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3849 parse->priv->lead_in = parse->priv->lead_out = 0;
3850 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3852 parse->priv->frame_duration =
3853 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3854 parse->priv->lead_in = lead_in;
3855 parse->priv->lead_out = lead_out;
3856 parse->priv->lead_in_ts =
3857 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3858 parse->priv->lead_out_ts =
3859 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3860 /* aim for about 1.5s to estimate duration */
3861 if (parse->priv->update_interval < 0) {
3862 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3863 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3864 parse->priv->update_interval);
3867 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3868 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3869 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3870 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3871 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3872 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3876 * gst_base_parse_set_has_timing_info:
3877 * @parse: a #GstBaseParse
3878 * @has_timing: whether frames carry timing information
3880 * Set if frames carry timing information which the subclass can (generally)
3881 * parse and provide. In particular, intrinsic (rather than estimated) time
3882 * can be obtained following a seek.
3885 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3887 parse->priv->has_timing_info = has_timing;
3888 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3892 * gst_base_parse_set_syncable:
3893 * @parse: a #GstBaseParse
3894 * @syncable: set if frame starts can be identified
3896 * Set if frame starts can be identified. This is set by default and
3897 * determines whether seeking based on bitrate averages
3898 * is possible for a format/stream.
3901 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3903 parse->priv->syncable = syncable;
3904 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3908 * gst_base_parse_set_passthrough:
3909 * @parse: a #GstBaseParse
3910 * @passthrough: %TRUE if parser should run in passthrough mode
3912 * Set if the nature of the format or configuration does not allow (much)
3913 * parsing, and the parser should operate in passthrough mode (which only
3914 * applies when operating in push mode). That is, incoming buffers are
3915 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3916 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3917 * so subclass can perform as much or as little is appropriate for
3918 * passthrough semantics in @pre_push_frame.
3921 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3923 parse->priv->passthrough = passthrough;
3924 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3928 * gst_base_parse_set_pts_interpolation:
3929 * @parse: a #GstBaseParse
3930 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3932 * By default, the base class will guess PTS timestamps using a simple
3933 * interpolation (previous timestamp + duration), which is incorrect for
3934 * data streams with reordering, where PTS can go backward. Sub-classes
3935 * implementing such formats should disable PTS interpolation.
3938 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3939 gboolean pts_interpolate)
3941 parse->priv->pts_interpolate = pts_interpolate;
3942 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3943 (pts_interpolate) ? "yes" : "no");
3947 * gst_base_parse_set_infer_ts:
3948 * @parse: a #GstBaseParse
3949 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3951 * By default, the base class might try to infer PTS from DTS and vice
3952 * versa. While this is generally correct for audio data, it may not
3953 * be otherwise. Sub-classes implementing such formats should disable
3954 * timestamp inferring.
3957 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3959 parse->priv->infer_ts = infer_ts;
3960 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3964 * gst_base_parse_set_latency:
3965 * @parse: a #GstBaseParse
3966 * @min_latency: minimum parse latency
3967 * @max_latency: maximum parse latency
3969 * Sets the minimum and maximum (which may likely be equal) latency introduced
3970 * by the parsing process. If there is such a latency, which depends on the
3971 * particular parsing of the format, it typically corresponds to 1 frame duration.
3974 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3975 GstClockTime max_latency)
3977 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3978 g_return_if_fail (min_latency <= max_latency);
3980 GST_OBJECT_LOCK (parse);
3981 parse->priv->min_latency = min_latency;
3982 parse->priv->max_latency = max_latency;
3983 GST_OBJECT_UNLOCK (parse);
3984 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3985 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3986 GST_TIME_ARGS (max_latency));
3990 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3991 GstClockTime * duration)
3993 gboolean res = FALSE;
3995 g_return_val_if_fail (duration != NULL, FALSE);
3997 *duration = GST_CLOCK_TIME_NONE;
3998 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3999 GST_LOG_OBJECT (parse, "using provided duration");
4000 *duration = parse->priv->duration;
4002 } else if (parse->priv->duration != -1) {
4003 GST_LOG_OBJECT (parse, "converting provided duration");
4004 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
4005 parse->priv->duration, format, (gint64 *) duration);
4006 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
4007 GST_LOG_OBJECT (parse, "using estimated duration");
4008 *duration = parse->priv->estimated_duration;
4011 GST_LOG_OBJECT (parse, "cannot estimate duration");
4014 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
4015 GST_TIME_ARGS (*duration));
4020 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
4022 gboolean res = FALSE;
4025 pad = GST_BASE_PARSE_SRC_PAD (parse);
4027 switch (GST_QUERY_TYPE (query)) {
4028 case GST_QUERY_POSITION:
4033 GST_DEBUG_OBJECT (parse, "position query");
4034 gst_query_parse_position (query, &format, NULL);
4036 /* try upstream first */
4037 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4039 /* Fall back on interpreting segment */
4040 GST_OBJECT_LOCK (parse);
4041 /* Only reply BYTES if upstream is in BYTES already, otherwise
4042 * we're not in charge */
4043 if (format == GST_FORMAT_BYTES
4044 && parse->priv->upstream_format == GST_FORMAT_BYTES) {
4045 dest_value = parse->priv->offset;
4047 } else if (format == parse->segment.format &&
4048 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
4049 dest_value = gst_segment_to_stream_time (&parse->segment,
4050 parse->segment.format, parse->segment.position);
4053 GST_OBJECT_UNLOCK (parse);
4054 if (!res && parse->priv->upstream_format == GST_FORMAT_BYTES) {
4055 /* no precise result, upstream no idea either, then best estimate */
4056 /* priv->offset is updated in both PUSH/PULL modes, *iff* we're
4057 * in charge of things */
4058 res = gst_base_parse_convert (parse,
4059 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
4062 gst_query_set_position (query, format, dest_value);
4066 case GST_QUERY_DURATION:
4069 GstClockTime duration;
4071 GST_DEBUG_OBJECT (parse, "duration query");
4072 gst_query_parse_duration (query, &format, NULL);
4074 /* consult upstream */
4075 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4077 /* otherwise best estimate from us */
4079 res = gst_base_parse_get_duration (parse, format, &duration);
4081 gst_query_set_duration (query, format, duration);
4085 case GST_QUERY_SEEKING:
4088 GstClockTime duration = GST_CLOCK_TIME_NONE;
4089 gboolean seekable = FALSE;
4091 GST_DEBUG_OBJECT (parse, "seeking query");
4092 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4094 /* consult upstream */
4095 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4097 /* we may be able to help if in TIME */
4098 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4099 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4100 /* already OK if upstream takes care */
4101 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4103 if (!(res && seekable)) {
4104 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4105 || duration == -1) {
4106 /* seekable if we still have a chance to get duration later on */
4108 parse->priv->upstream_seekable && parse->priv->update_interval;
4110 seekable = parse->priv->upstream_seekable;
4111 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4114 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4120 case GST_QUERY_FORMATS:
4121 gst_query_set_formatsv (query, 3, fmtlist);
4124 case GST_QUERY_CONVERT:
4126 GstFormat src_format, dest_format;
4127 gint64 src_value, dest_value;
4129 gst_query_parse_convert (query, &src_format, &src_value,
4130 &dest_format, &dest_value);
4132 res = gst_base_parse_convert (parse, src_format, src_value,
4133 dest_format, &dest_value);
4135 gst_query_set_convert (query, src_format, src_value,
4136 dest_format, dest_value);
4140 case GST_QUERY_LATENCY:
4142 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4144 GstClockTime min_latency, max_latency;
4146 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4147 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4148 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4149 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4151 GST_OBJECT_LOCK (parse);
4152 /* add our latency */
4153 min_latency += parse->priv->min_latency;
4154 if (max_latency == -1 || parse->priv->max_latency == -1)
4157 max_latency += parse->priv->max_latency;
4158 GST_OBJECT_UNLOCK (parse);
4160 gst_query_set_latency (query, live, min_latency, max_latency);
4164 case GST_QUERY_SEGMENT:
4169 format = parse->segment.format;
4172 gst_segment_to_stream_time (&parse->segment, format,
4173 parse->segment.start);
4174 if ((stop = parse->segment.stop) == -1)
4175 stop = parse->segment.duration;
4177 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4179 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4184 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4190 /* scans for a cluster start from @pos,
4191 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4192 static GstFlowReturn
4193 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4194 GstClockTime * time, GstClockTime * duration)
4196 GstBaseParseClass *klass;
4198 gboolean orig_drain, orig_discont;
4199 GstFlowReturn ret = GST_FLOW_OK;
4200 GstBuffer *buf = NULL;
4201 GstBaseParseFrame *sframe = NULL;
4203 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4204 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4205 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4207 klass = GST_BASE_PARSE_GET_CLASS (parse);
4209 *time = GST_CLOCK_TIME_NONE;
4210 *duration = GST_CLOCK_TIME_NONE;
4213 orig_offset = parse->priv->offset;
4214 orig_discont = parse->priv->discont;
4215 orig_drain = parse->priv->drain;
4217 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4218 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4220 /* jump elsewhere and locate next frame */
4221 parse->priv->offset = *pos;
4222 /* mark as scanning so frames don't get processed all the way */
4223 parse->priv->scanning = TRUE;
4224 ret = gst_base_parse_scan_frame (parse, klass);
4225 parse->priv->scanning = FALSE;
4226 /* retrieve frame found during scan */
4227 sframe = parse->priv->scanned_frame;
4228 parse->priv->scanned_frame = NULL;
4230 if (ret != GST_FLOW_OK || !sframe)
4233 /* get offset first, subclass parsing might dump other stuff in there */
4234 *pos = sframe->offset;
4235 buf = sframe->buffer;
4238 /* but it should provide proper time */
4239 *time = GST_BUFFER_TIMESTAMP (buf);
4240 *duration = GST_BUFFER_DURATION (buf);
4242 GST_LOG_OBJECT (parse,
4243 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4244 GST_TIME_ARGS (*time), *pos);
4248 gst_base_parse_frame_free (sframe);
4251 parse->priv->offset = orig_offset;
4252 parse->priv->discont = orig_discont;
4253 parse->priv->drain = orig_drain;
4258 /* bisect and scan through file for frame starting before @time,
4259 * returns OK and @time/@offset if found, NONE and/or error otherwise
4260 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4261 static GstFlowReturn
4262 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4265 GstFlowReturn ret = GST_FLOW_OK;
4266 gint64 lpos, hpos, newpos;
4267 GstClockTime time, ltime, htime, newtime, dur;
4268 gboolean cont = TRUE;
4269 const GstClockTime tolerance = TARGET_DIFFERENCE;
4270 const guint chunk = 4 * 1024;
4272 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4273 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4275 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4276 GST_TIME_ARGS (*_time));
4278 /* TODO also make keyframe aware if useful some day */
4293 /* do not know at first */
4295 *_time = GST_CLOCK_TIME_NONE;
4297 /* need initial positions; start and end */
4298 lpos = parse->priv->first_frame_offset;
4299 ltime = parse->priv->first_frame_pts;
4300 /* try other one if no luck */
4301 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4302 ltime = parse->priv->first_frame_dts;
4303 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4304 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4305 return GST_FLOW_ERROR;
4307 hpos = parse->priv->upstream_size;
4309 GST_DEBUG_OBJECT (parse,
4310 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4311 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4312 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4314 /* check preconditions are satisfied;
4315 * start and end are needed, except for special case where we scan for
4316 * last frame to determine duration */
4317 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4318 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4319 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4323 /* shortcut cases */
4326 } else if (time < ltime + tolerance) {
4330 } else if (time >= htime) {
4336 while (htime > ltime && cont) {
4337 GST_LOG_OBJECT (parse,
4338 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4339 GST_TIME_ARGS (ltime));
4340 GST_LOG_OBJECT (parse,
4341 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4342 GST_TIME_ARGS (htime));
4343 if (G_UNLIKELY (time == G_MAXINT64)) {
4345 } else if (G_LIKELY (hpos > lpos)) {
4347 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4350 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4352 /* we check this case once, but not forever, so break loop */
4357 newpos = CLAMP (newpos, lpos, hpos);
4358 GST_LOG_OBJECT (parse,
4359 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4360 GST_TIME_ARGS (time), newpos);
4362 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4363 if (ret == GST_FLOW_EOS) {
4364 /* heuristic HACK */
4365 hpos = MAX (lpos, hpos - chunk);
4367 } else if (ret != GST_FLOW_OK) {
4371 if (newtime == -1 || newpos == -1) {
4372 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4376 if (G_UNLIKELY (time == G_MAXINT64)) {
4379 if (GST_CLOCK_TIME_IS_VALID (dur))
4382 } else if (newtime > time) {
4384 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4386 } else if (newtime + tolerance > time) {
4387 /* close enough undershoot */
4391 } else if (newtime < ltime) {
4392 /* so a position beyond lpos resulted in earlier time than ltime ... */
4393 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4396 /* undershoot too far */
4397 newpos += newpos == lpos ? chunk : 0;
4398 lpos = CLAMP (newpos, lpos, hpos);
4404 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4405 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4410 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4411 gboolean before, GstClockTime * _ts)
4413 gint64 bytes = 0, ts = 0;
4414 GstIndexEntry *entry = NULL;
4416 if (time == GST_CLOCK_TIME_NONE) {
4422 GST_BASE_PARSE_INDEX_LOCK (parse);
4423 if (parse->priv->index) {
4424 /* Let's check if we have an index entry for that time */
4425 entry = gst_index_get_assoc_entry (parse->priv->index,
4426 parse->priv->index_id,
4427 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4428 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4432 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4433 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4435 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4436 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4437 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4439 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4440 GST_TIME_ARGS (time));
4443 ts = GST_CLOCK_TIME_NONE;
4446 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4455 /* returns TRUE if seek succeeded */
4457 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4462 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4463 gboolean flush, update, res = TRUE, accurate;
4464 gint64 start, stop, seekpos, seekstop;
4465 GstSegment seeksegment = { 0, };
4466 GstClockTime start_ts;
4468 GstEvent *segment_event;
4470 /* try upstream first, unless we're driving the streaming thread ourselves */
4471 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4472 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4477 gst_event_parse_seek (event, &rate, &format, &flags,
4478 &start_type, &start, &stop_type, &stop);
4479 seqnum = gst_event_get_seqnum (event);
4481 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4482 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4483 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4484 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4486 /* we can only handle TIME, so check if subclass can convert
4487 * to TIME format if it's some other format (such as DEFAULT) */
4488 if (format != GST_FORMAT_TIME) {
4489 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4490 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4492 goto no_convert_to_time;
4494 GST_INFO_OBJECT (parse, "converted %s format to start time "
4495 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4496 gst_format_get_name (format), GST_TIME_ARGS (start),
4497 GST_TIME_ARGS (stop));
4499 format = GST_FORMAT_TIME;
4502 /* no negative rates in push mode (unless upstream takes care of that, but
4503 * we've already tried upstream and it didn't handle the seek request) */
4504 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4507 if (start_type != GST_SEEK_TYPE_SET ||
4508 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4511 /* get flush flag */
4512 flush = flags & GST_SEEK_FLAG_FLUSH;
4514 /* copy segment, we need this because we still need the old
4515 * segment when we close the current segment. */
4516 gst_segment_copy_into (&parse->segment, &seeksegment);
4518 GST_DEBUG_OBJECT (parse, "configuring seek");
4519 gst_segment_do_seek (&seeksegment, rate, format, flags,
4520 start_type, start, stop_type, stop, &update);
4522 /* accurate seeking implies seek tables are used to obtain position,
4523 * and the requested segment is maintained exactly, not adjusted any way */
4524 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4526 /* maybe we can be accurate for (almost) free */
4527 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4528 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4529 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4534 GstClockTime startpos;
4536 startpos = seeksegment.position;
4540 /* accurate requested, so ... seek a bit before target */
4541 if (startpos < parse->priv->lead_in_ts)
4544 startpos -= parse->priv->lead_in_ts;
4546 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4547 seeksegment.stop = seeksegment.start + seeksegment.duration;
4549 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4550 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4554 start_ts = seeksegment.position;
4558 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4559 seeksegment.stop = seeksegment.start + seeksegment.duration;
4561 if (!gst_base_parse_convert (parse, format, start_ts,
4562 GST_FORMAT_BYTES, &seekpos))
4563 goto convert_failed;
4564 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4565 GST_FORMAT_BYTES, &seekstop))
4566 goto convert_failed;
4569 GST_DEBUG_OBJECT (parse,
4570 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4572 GST_DEBUG_OBJECT (parse,
4573 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4574 seeksegment.stop, seekstop);
4576 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4579 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4582 if (parse->srcpad) {
4583 GstEvent *fevent = gst_event_new_flush_start ();
4584 GST_DEBUG_OBJECT (parse, "sending flush start");
4586 gst_event_set_seqnum (fevent, seqnum);
4588 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4589 /* unlock upstream pull_range */
4590 gst_pad_push_event (parse->sinkpad, fevent);
4593 gst_pad_pause_task (parse->sinkpad);
4596 /* we should now be able to grab the streaming thread because we stopped it
4597 * with the above flush/pause code */
4598 GST_PAD_STREAM_LOCK (parse->sinkpad);
4600 /* save current position */
4601 last_stop = parse->segment.position;
4602 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4605 /* now commit to new position */
4607 /* prepare for streaming again */
4609 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4610 GST_DEBUG_OBJECT (parse, "sending flush stop");
4611 gst_event_set_seqnum (fevent, seqnum);
4612 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4613 gst_pad_push_event (parse->sinkpad, fevent);
4614 gst_base_parse_clear_queues (parse);
4617 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4619 /* store the newsegment event so it can be sent from the streaming thread. */
4620 /* This will be sent later in _loop() */
4621 segment_event = gst_event_new_segment (&parse->segment);
4622 gst_event_set_seqnum (segment_event, seqnum);
4623 parse->priv->pending_events =
4624 g_list_prepend (parse->priv->pending_events, segment_event);
4626 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4627 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4628 ", time = %" GST_TIME_FORMAT, format,
4629 GST_TIME_ARGS (parse->segment.start),
4630 GST_TIME_ARGS (parse->segment.stop),
4631 GST_TIME_ARGS (parse->segment.time));
4633 /* one last chance in pull mode to stay accurate;
4634 * maybe scan and subclass can find where to go */
4637 GstClockTime ts = seeksegment.position;
4639 gst_base_parse_locate_time (parse, &ts, &scanpos);
4643 /* running collected index now consists of several intervals,
4644 * so optimized check no longer possible */
4645 parse->priv->index_last_valid = FALSE;
4646 parse->priv->index_last_offset = 0;
4647 parse->priv->index_last_ts = 0;
4651 /* mark discont if we are going to stream from another position. */
4652 if (seekpos != parse->priv->offset) {
4653 GST_DEBUG_OBJECT (parse,
4654 "mark DISCONT, we did a seek to another position");
4655 parse->priv->offset = seekpos;
4656 parse->priv->last_offset = seekpos;
4657 parse->priv->seen_keyframe = FALSE;
4658 parse->priv->discont = TRUE;
4659 parse->priv->next_dts = start_ts;
4660 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4661 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4662 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4663 parse->priv->sync_offset = seekpos;
4664 parse->priv->exact_position = accurate;
4667 /* Start streaming thread if paused */
4668 gst_pad_start_task (parse->sinkpad,
4669 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4671 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4676 GstEvent *new_event;
4677 GstBaseParseSeek *seek;
4678 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4680 /* The only thing we need to do in PUSH-mode is to send the
4681 seek event (in bytes) to upstream. Segment / flush handling happens
4682 in corresponding src event handlers */
4683 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4684 if (seekstop >= 0 && seekstop <= seekpos)
4686 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4687 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4688 gst_event_set_seqnum (new_event, seqnum);
4690 /* store segment info so its precise details can be reconstructed when
4691 * receiving newsegment;
4692 * this matters for all details when accurate seeking,
4693 * is most useful to preserve NONE stop time otherwise */
4694 seek = g_new0 (GstBaseParseSeek, 1);
4695 seek->segment = seeksegment;
4696 seek->accurate = accurate;
4697 seek->offset = seekpos;
4698 seek->start_ts = start_ts;
4699 GST_OBJECT_LOCK (parse);
4700 /* less optimal, but preserves order */
4701 parse->priv->pending_seeks =
4702 g_slist_append (parse->priv->pending_seeks, seek);
4703 GST_OBJECT_UNLOCK (parse);
4705 res = gst_pad_push_event (parse->sinkpad, new_event);
4708 GST_OBJECT_LOCK (parse);
4709 parse->priv->pending_seeks =
4710 g_slist_remove (parse->priv->pending_seeks, seek);
4711 GST_OBJECT_UNLOCK (parse);
4717 gst_event_unref (event);
4723 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4729 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4735 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4736 "couldn't convert that into TIME format", gst_format_get_name (format));
4742 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4749 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4751 if (taglist == parse->priv->upstream_tags)
4754 if (parse->priv->upstream_tags) {
4755 gst_tag_list_unref (parse->priv->upstream_tags);
4756 parse->priv->upstream_tags = NULL;
4759 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4761 if (taglist != NULL)
4762 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4764 gst_base_parse_check_bitrate_tags (parse);
4769 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4771 GstBaseParse *parse = GST_BASE_PARSE (element);
4773 GST_BASE_PARSE_INDEX_LOCK (parse);
4774 if (parse->priv->index)
4775 gst_object_unref (parse->priv->index);
4777 parse->priv->index = gst_object_ref (index);
4778 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4779 &parse->priv->index_id);
4780 parse->priv->own_index = FALSE;
4782 parse->priv->index = NULL;
4784 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4788 gst_base_parse_get_index (GstElement * element)
4790 GstBaseParse *parse = GST_BASE_PARSE (element);
4791 GstIndex *result = NULL;
4793 GST_BASE_PARSE_INDEX_LOCK (parse);
4794 if (parse->priv->index)
4795 result = gst_object_ref (parse->priv->index);
4796 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4802 static GstStateChangeReturn
4803 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4805 GstBaseParse *parse;
4806 GstStateChangeReturn result;
4808 parse = GST_BASE_PARSE (element);
4810 switch (transition) {
4811 case GST_STATE_CHANGE_READY_TO_PAUSED:
4812 /* If this is our own index destroy it as the
4813 * old entries might be wrong for the new stream */
4814 GST_BASE_PARSE_INDEX_LOCK (parse);
4815 if (parse->priv->own_index) {
4816 gst_object_unref (parse->priv->index);
4817 parse->priv->index = NULL;
4818 parse->priv->own_index = FALSE;
4821 /* If no index was created, generate one */
4822 if (G_UNLIKELY (!parse->priv->index)) {
4823 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4825 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4826 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4827 &parse->priv->index_id);
4828 parse->priv->own_index = TRUE;
4830 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4836 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4838 switch (transition) {
4839 case GST_STATE_CHANGE_PAUSED_TO_READY:
4840 gst_base_parse_reset (parse);
4850 * gst_base_parse_set_ts_at_offset:
4851 * @parse: a #GstBaseParse
4852 * @offset: offset into current buffer
4854 * This function should only be called from a @handle_frame implementation.
4856 * #GstBaseParse creates initial timestamps for frames by using the last
4857 * timestamp seen in the stream before the frame starts. In certain
4858 * cases, the correct timestamps will occur in the stream after the
4859 * start of the frame, but before the start of the actual picture data.
4860 * This function can be used to set the timestamps based on the offset
4861 * into the frame data that the picture starts.
4866 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4868 GstClockTime pts, dts;
4870 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4872 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4873 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4875 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4876 GST_DEBUG_OBJECT (parse,
4877 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4878 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4880 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4881 parse->priv->prev_pts = parse->priv->next_pts = pts;
4883 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
4884 parse->priv->prev_dts = parse->priv->next_dts = dts;
4885 parse->priv->prev_dts_from_pts = FALSE;
4890 * gst_base_parse_merge_tags:
4891 * @parse: a #GstBaseParse
4892 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4893 * previously-set tags
4894 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4896 * Sets the parser subclass's tags and how they should be merged with any
4897 * upstream stream tags. This will override any tags previously-set
4898 * with gst_base_parse_merge_tags().
4900 * Note that this is provided for convenience, and the subclass is
4901 * not required to use this and can still do tag handling on its own.
4906 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4907 GstTagMergeMode mode)
4909 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4910 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4911 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4913 GST_OBJECT_LOCK (parse);
4915 if (tags != parse->priv->parser_tags) {
4916 if (parse->priv->parser_tags) {
4917 gst_tag_list_unref (parse->priv->parser_tags);
4918 parse->priv->parser_tags = NULL;
4919 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4922 parse->priv->parser_tags = gst_tag_list_ref (tags);
4923 parse->priv->parser_tags_merge_mode = mode;
4926 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4927 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4929 gst_base_parse_check_bitrate_tags (parse);
4930 parse->priv->tags_changed = TRUE;
4933 GST_OBJECT_UNLOCK (parse);