2 * Copyright (C) 2008 Nokia Corporation. All rights reserved.
3 * Contact: Stefan Kost <stefan.kost@nokia.com>
4 * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
5 * Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
6 * Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 * SECTION:gstbaseparse
26 * @short_description: Base class for stream parsers
27 * @see_also: #GstBaseTransform
29 * This base class is for parser elements that process data and splits it
30 * into separate audio/video/whatever frames.
34 * <listitem><para>provides one sink pad and one source pad</para></listitem>
35 * <listitem><para>handles state changes</para></listitem>
36 * <listitem><para>can operate in pull mode or push mode</para></listitem>
37 * <listitem><para>handles seeking in both modes</para></listitem>
38 * <listitem><para>handles events (SEGMENT/EOS/FLUSH)</para></listitem>
40 * handles queries (POSITION/DURATION/SEEKING/FORMAT/CONVERT)
42 * <listitem><para>handles flushing</para></listitem>
45 * The purpose of this base class is to provide the basic functionality of
46 * a parser and share a lot of rather complex code.
48 * Description of the parsing mechanism:
51 * <itemizedlist><title>Set-up phase</title>
53 * #GstBaseParse calls @start to inform subclass that data processing is
57 * #GstBaseParse class calls @set_sink_caps to inform the subclass about
58 * incoming sinkpad caps. Subclass could already set the srcpad caps
59 * accordingly, but this might be delayed until calling
60 * gst_base_parse_finish_frame() with a non-queued frame.
63 * At least at this point subclass needs to tell the #GstBaseParse class
64 * how big data chunks it wants to receive (min_frame_size). It can do
65 * this with gst_base_parse_set_min_frame_size().
68 * #GstBaseParse class sets up appropriate data passing mode (pull/push)
69 * and starts to process the data.
75 * <title>Parsing phase</title>
77 * #GstBaseParse gathers at least min_frame_size bytes of data either
78 * by pulling it from upstream or collecting buffers in an internal
82 * A buffer of (at least) min_frame_size bytes is passed to subclass with
83 * @handle_frame. Subclass checks the contents and can optionally
84 * return GST_FLOW_OK along with an amount of data to be skipped to find
85 * a valid frame (which will result in a subsequent DISCONT).
86 * If, otherwise, the buffer does not hold a complete frame,
87 * @handle_frame can merely return and will be called again when additional
88 * data is available. In push mode this amounts to an
89 * additional input buffer (thus minimal additional latency), in pull mode
90 * this amounts to some arbitrary reasonable buffer size increase.
91 * Of course, gst_base_parse_set_min_frame_size() could also be used if a
92 * very specific known amount of additional data is required.
93 * If, however, the buffer holds a complete valid frame, it can pass
94 * the size of this frame to gst_base_parse_finish_frame().
95 * If acting as a converter, it can also merely indicate consumed input data
96 * while simultaneously providing custom output data.
97 * Note that baseclass performs some processing (such as tracking
98 * overall consumed data rate versus duration) for each finished frame,
99 * but other state is only updated upon each call to @handle_frame
100 * (such as tracking upstream input timestamp).
102 * Subclass is also responsible for setting the buffer metadata
103 * (e.g. buffer timestamp and duration, or keyframe if applicable).
104 * (although the latter can also be done by #GstBaseParse if it is
105 * appropriately configured, see below). Frame is provided with
106 * timestamp derived from upstream (as much as generally possible),
107 * duration obtained from configuration (see below), and offset
108 * if meaningful (in pull mode).
110 * Note that @check_valid_frame might receive any small
111 * amount of input data when leftover data is being drained (e.g. at EOS).
114 * As part of finish frame processing,
115 * just prior to actually pushing the buffer in question,
116 * it is passed to @pre_push_frame which gives subclass yet one
117 * last chance to examine buffer metadata, or to send some custom (tag)
118 * events, or to perform custom (segment) filtering.
121 * During the parsing process #GstBaseParseClass will handle both srcpad
122 * and sinkpad events. They will be passed to subclass if @event or
123 * @src_event callbacks have been provided.
128 * <itemizedlist><title>Shutdown phase</title>
130 * #GstBaseParse class calls @stop to inform the subclass that data
131 * parsing will be stopped.
137 * Subclass is responsible for providing pad template caps for
138 * source and sink pads. The pads need to be named "sink" and "src". It also
139 * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
140 * when base class calls subclass' @set_sink_caps function).
142 * This base class uses %GST_FORMAT_DEFAULT as a meaning of frames. So,
143 * subclass conversion routine needs to know that conversion from
144 * %GST_FORMAT_TIME to %GST_FORMAT_DEFAULT must return the
145 * frame number that can be found from the given byte position.
147 * #GstBaseParse uses subclasses conversion methods also for seeking (or
148 * otherwise uses its own default one, see also below).
150 * Subclass @start and @stop functions will be called to inform the beginning
151 * and end of data processing.
153 * Things that subclass need to take care of:
155 * <listitem><para>Provide pad templates</para></listitem>
157 * Fixate the source pad caps when appropriate
160 * Inform base class how big data chunks should be retrieved. This is
161 * done with gst_base_parse_set_min_frame_size() function.
164 * Examine data chunks passed to subclass with @handle_frame and pass
165 * proper frame(s) to gst_base_parse_finish_frame(), and setting src pad
166 * caps and timestamps on frame.
168 * <listitem><para>Provide conversion functions</para></listitem>
170 * Update the duration information with gst_base_parse_set_duration()
173 * Optionally passthrough using gst_base_parse_set_passthrough()
176 * Configure various baseparse parameters using
177 * gst_base_parse_set_average_bitrate(), gst_base_parse_set_syncable()
178 * and gst_base_parse_set_frame_rate().
181 * In particular, if subclass is unable to determine a duration, but
182 * parsing (or specs) yields a frames per seconds rate, then this can be
183 * provided to #GstBaseParse to enable it to cater for
184 * buffer time metadata (which will be taken from upstream as much as
185 * possible). Internally keeping track of frame durations and respective
186 * sizes that have been pushed provides #GstBaseParse with an estimated
187 * bitrate. A default @convert (used if not overridden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
221 #define MAX_INDEX_ENTRIES 4096
222 #define UPDATE_THRESHOLD 2
224 #define ABSDIFF(a,b) (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
226 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
227 #define GST_CAT_DEFAULT gst_base_parse_debug
229 /* Supported formats */
230 static const GstFormat fmtlist[] = {
237 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
238 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
240 struct _GstBaseParsePrivate
247 GstFormat duration_fmt;
248 gint64 estimated_duration;
249 gint64 estimated_drift;
251 guint min_frame_size;
252 gboolean disable_passthrough;
253 gboolean passthrough;
254 gboolean pts_interpolate;
257 gboolean has_timing_info;
258 guint fps_num, fps_den;
259 gint update_interval;
261 guint lead_in, lead_out;
262 GstClockTime lead_in_ts, lead_out_ts;
263 GstClockTime min_latency, max_latency;
272 GstClockTime next_pts;
273 GstClockTime next_dts;
274 GstClockTime prev_pts;
275 GstClockTime prev_dts;
276 gboolean prev_dts_from_pts;
277 GstClockTime frame_duration;
278 gboolean seen_keyframe;
284 guint64 data_bytecount;
285 guint64 acc_duration;
286 GstClockTime first_frame_pts;
287 GstClockTime first_frame_dts;
288 gint64 first_frame_offset;
290 gboolean post_min_bitrate;
291 gboolean post_avg_bitrate;
292 gboolean post_max_bitrate;
297 guint posted_avg_bitrate;
299 /* frames/buffers that are queued and ready to go on OK */
300 GQueue queued_frames;
304 /* index entry storage, either ours or provided */
310 /* seek table entries only maintained if upstream is BYTE seekable */
311 gboolean upstream_seekable;
312 gboolean upstream_has_duration;
313 gint64 upstream_size;
314 GstFormat upstream_format;
315 /* minimum distance between two index entries */
316 GstClockTimeDiff idx_interval;
317 guint64 idx_byte_interval;
318 /* ts and offset of last entry added */
319 GstClockTime index_last_ts;
320 gint64 index_last_offset;
321 gboolean index_last_valid;
323 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
324 gboolean exact_position;
325 /* seek events are temporarily kept to match them with newsegments */
326 GSList *pending_seeks;
328 /* reverse playback */
329 GSList *buffers_pending;
330 GSList *buffers_head;
331 GSList *buffers_queued;
332 GSList *buffers_send;
333 GstClockTime last_pts;
334 GstClockTime last_dts;
337 /* Pending serialized events */
338 GList *pending_events;
340 /* If baseparse has checked the caps to identify if it is
341 * handling video or audio */
342 gboolean checked_media;
344 /* offset of last parsed frame/data */
346 /* force a new frame, regardless of offset */
348 /* whether we are merely scanning for a frame */
350 /* ... and resulting frame, if any */
351 GstBaseParseFrame *scanned_frame;
353 /* TRUE if we're still detecting the format, i.e.
354 * if ::detect() is still called for future buffers */
356 GList *detect_buffers;
357 guint detect_buffers_size;
359 /* True when no buffers have been received yet */
360 gboolean first_buffer;
362 /* if TRUE, a STREAM_START event needs to be pushed */
363 gboolean push_stream_start;
365 /* When we need to skip more data than we have currently */
368 /* Tag handling (stream tags only, global tags are passed through as-is) */
369 GstTagList *upstream_tags;
370 GstTagList *parser_tags;
371 GstTagMergeMode parser_tags_merge_mode;
372 gboolean tags_changed;
375 typedef struct _GstBaseParseSeek
380 GstClockTime start_ts;
383 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
388 PROP_DISABLE_PASSTHROUGH,
392 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
393 g_mutex_lock (&parse->priv->index_lock);
394 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
395 g_mutex_unlock (&parse->priv->index_lock);
397 static GstElementClass *parent_class = NULL;
399 static void gst_base_parse_class_init (GstBaseParseClass * klass);
400 static void gst_base_parse_init (GstBaseParse * parse,
401 GstBaseParseClass * klass);
404 gst_base_parse_get_type (void)
406 static volatile gsize base_parse_type = 0;
408 if (g_once_init_enter (&base_parse_type)) {
409 static const GTypeInfo base_parse_info = {
410 sizeof (GstBaseParseClass),
411 (GBaseInitFunc) NULL,
412 (GBaseFinalizeFunc) NULL,
413 (GClassInitFunc) gst_base_parse_class_init,
416 sizeof (GstBaseParse),
418 (GInstanceInitFunc) gst_base_parse_init,
422 _type = g_type_register_static (GST_TYPE_ELEMENT,
423 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
424 g_once_init_leave (&base_parse_type, _type);
426 return (GType) base_parse_type;
429 static void gst_base_parse_finalize (GObject * object);
431 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
432 GstStateChange transition);
433 static void gst_base_parse_reset (GstBaseParse * parse);
436 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
437 static GstIndex *gst_base_parse_get_index (GstElement * element);
440 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
442 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
443 GstObject * parent, GstPadMode mode, gboolean active);
444 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
446 static void gst_base_parse_set_upstream_tags (GstBaseParse * parse,
447 GstTagList * taglist);
449 static void gst_base_parse_set_property (GObject * object, guint prop_id,
450 const GValue * value, GParamSpec * pspec);
451 static void gst_base_parse_get_property (GObject * object, guint prop_id,
452 GValue * value, GParamSpec * pspec);
454 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
456 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
459 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
461 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
464 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
466 static void gst_base_parse_loop (GstPad * pad);
468 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
469 GstBaseParseFrame * frame);
471 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
474 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
477 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
479 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
482 static void gst_base_parse_drain (GstBaseParse * parse);
484 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
485 GstClockTime time, gboolean before, GstClockTime * _ts);
486 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
487 GstClockTime * _time, gint64 * _offset);
489 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
490 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
492 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
494 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
496 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
498 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
501 gst_base_parse_clear_queues (GstBaseParse * parse)
503 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
504 g_slist_free (parse->priv->buffers_queued);
505 parse->priv->buffers_queued = NULL;
506 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
508 g_slist_free (parse->priv->buffers_pending);
509 parse->priv->buffers_pending = NULL;
510 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
511 g_slist_free (parse->priv->buffers_head);
512 parse->priv->buffers_head = NULL;
513 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
514 g_slist_free (parse->priv->buffers_send);
515 parse->priv->buffers_send = NULL;
517 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
518 g_list_free (parse->priv->detect_buffers);
519 parse->priv->detect_buffers = NULL;
520 parse->priv->detect_buffers_size = 0;
522 g_queue_foreach (&parse->priv->queued_frames,
523 (GFunc) gst_base_parse_frame_free, NULL);
524 g_queue_clear (&parse->priv->queued_frames);
526 gst_buffer_replace (&parse->priv->cache, NULL);
528 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
529 g_list_free (parse->priv->pending_events);
530 parse->priv->pending_events = NULL;
532 parse->priv->checked_media = FALSE;
536 gst_base_parse_finalize (GObject * object)
538 GstBaseParse *parse = GST_BASE_PARSE (object);
540 g_object_unref (parse->priv->adapter);
542 if (parse->priv->index) {
543 gst_object_unref (parse->priv->index);
544 parse->priv->index = NULL;
546 g_mutex_clear (&parse->priv->index_lock);
548 gst_base_parse_clear_queues (parse);
550 G_OBJECT_CLASS (parent_class)->finalize (object);
554 gst_base_parse_class_init (GstBaseParseClass * klass)
556 GObjectClass *gobject_class;
557 GstElementClass *gstelement_class;
559 gobject_class = G_OBJECT_CLASS (klass);
560 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
561 parent_class = g_type_class_peek_parent (klass);
563 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
564 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
565 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
568 * GstBaseParse:disable-passthrough:
570 * If set to %TRUE, baseparse will unconditionally force parsing of the
571 * incoming data. This can be required in the rare cases where the incoming
572 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
573 * force validation and parsing of the incoming data.
574 * If set to %FALSE, decision of whether to parse the data or not is up to
575 * the implementation (standard behaviour).
577 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
578 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
579 "Force processing (disables passthrough)",
580 DEFAULT_DISABLE_PASSTHROUGH,
581 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
583 gstelement_class = (GstElementClass *) klass;
584 gstelement_class->change_state =
585 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
588 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
589 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
592 /* Default handlers */
593 klass->sink_event = gst_base_parse_sink_event_default;
594 klass->src_event = gst_base_parse_src_event_default;
595 klass->sink_query = gst_base_parse_sink_query_default;
596 klass->src_query = gst_base_parse_src_query_default;
597 klass->convert = gst_base_parse_convert_default;
599 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
600 "baseparse element");
604 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
606 GstPadTemplate *pad_template;
608 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
610 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
613 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
614 g_return_if_fail (pad_template != NULL);
615 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
616 gst_pad_set_event_function (parse->sinkpad,
617 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
618 gst_pad_set_query_function (parse->sinkpad,
619 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
620 gst_pad_set_chain_function (parse->sinkpad,
621 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
622 gst_pad_set_activate_function (parse->sinkpad,
623 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
624 gst_pad_set_activatemode_function (parse->sinkpad,
625 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
626 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
627 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
629 GST_DEBUG_OBJECT (parse, "sinkpad created");
632 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
633 g_return_if_fail (pad_template != NULL);
634 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
635 gst_pad_set_event_function (parse->srcpad,
636 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
637 gst_pad_set_query_function (parse->srcpad,
638 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
639 gst_pad_use_fixed_caps (parse->srcpad);
640 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
641 GST_DEBUG_OBJECT (parse, "src created");
643 g_queue_init (&parse->priv->queued_frames);
645 parse->priv->adapter = gst_adapter_new ();
647 parse->priv->pad_mode = GST_PAD_MODE_NONE;
649 g_mutex_init (&parse->priv->index_lock);
652 gst_base_parse_reset (parse);
653 GST_DEBUG_OBJECT (parse, "init ok");
655 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
657 parse->priv->upstream_tags = NULL;
658 parse->priv->parser_tags = NULL;
659 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
663 gst_base_parse_set_property (GObject * object, guint prop_id,
664 const GValue * value, GParamSpec * pspec)
666 GstBaseParse *parse = GST_BASE_PARSE (object);
669 case PROP_DISABLE_PASSTHROUGH:
670 parse->priv->disable_passthrough = g_value_get_boolean (value);
673 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
679 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
682 GstBaseParse *parse = GST_BASE_PARSE (object);
685 case PROP_DISABLE_PASSTHROUGH:
686 g_value_set_boolean (value, parse->priv->disable_passthrough);
689 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
694 static GstBaseParseFrame *
695 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
697 GstBaseParseFrame *copy;
699 copy = g_slice_dup (GstBaseParseFrame, frame);
700 copy->buffer = gst_buffer_ref (frame->buffer);
701 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
703 GST_TRACE ("copied frame %p -> %p", frame, copy);
709 gst_base_parse_frame_free (GstBaseParseFrame * frame)
711 GST_TRACE ("freeing frame %p", frame);
714 gst_buffer_unref (frame->buffer);
715 frame->buffer = NULL;
718 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
719 g_slice_free (GstBaseParseFrame, frame);
721 memset (frame, 0, sizeof (*frame));
725 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
726 (GBoxedCopyFunc) gst_base_parse_frame_copy,
727 (GBoxedFreeFunc) gst_base_parse_frame_free);
730 * gst_base_parse_frame_init:
731 * @frame: #GstBaseParseFrame.
733 * Sets a #GstBaseParseFrame to initial state. Currently this means
734 * all public fields are zero-ed and a private flag is set to make
735 * sure gst_base_parse_frame_free() only frees the contents but not
736 * the actual frame. Use this function to initialise a #GstBaseParseFrame
737 * allocated on the stack.
740 gst_base_parse_frame_init (GstBaseParseFrame * frame)
742 memset (frame, 0, sizeof (GstBaseParseFrame));
743 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
744 GST_TRACE ("inited frame %p", frame);
748 * gst_base_parse_frame_new:
749 * @buffer: (transfer none): a #GstBuffer
751 * @overhead: number of bytes in this frame which should be counted as
752 * metadata overhead, ie. not used to calculate the average bitrate.
753 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
755 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
756 * elements written in C should usually allocate the frame on the stack and
757 * then use gst_base_parse_frame_init() to initialise it.
759 * Returns: a newly-allocated #GstBaseParseFrame. Free with
760 * gst_base_parse_frame_free() when no longer needed.
763 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
766 GstBaseParseFrame *frame;
768 frame = g_slice_new0 (GstBaseParseFrame);
769 frame->buffer = gst_buffer_ref (buffer);
771 GST_TRACE ("created frame %p", frame);
776 gst_base_parse_update_flags (GstBaseParse * parse)
780 /* set flags one by one for clarity */
781 if (G_UNLIKELY (parse->priv->drain))
782 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
784 /* losing sync is pretty much a discont (and vice versa), no ? */
785 if (G_UNLIKELY (parse->priv->discont))
786 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
790 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
792 if (G_UNLIKELY (parse->priv->discont)) {
793 GST_DEBUG_OBJECT (parse, "marking DISCONT");
794 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
796 GST_BUFFER_FLAG_UNSET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
799 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
800 GST_LOG_OBJECT (parse, "marking as new frame");
801 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
804 frame->offset = parse->priv->prev_offset = parse->priv->offset;
808 gst_base_parse_reset (GstBaseParse * parse)
810 GST_OBJECT_LOCK (parse);
811 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
812 parse->priv->duration = -1;
813 parse->priv->min_frame_size = 1;
814 parse->priv->discont = TRUE;
815 parse->priv->flushing = FALSE;
816 parse->priv->saw_gaps = FALSE;
817 parse->priv->offset = 0;
818 parse->priv->sync_offset = 0;
819 parse->priv->update_interval = -1;
820 parse->priv->fps_num = parse->priv->fps_den = 0;
821 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
822 parse->priv->lead_in = parse->priv->lead_out = 0;
823 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
824 parse->priv->bitrate = 0;
825 parse->priv->framecount = 0;
826 parse->priv->bytecount = 0;
827 parse->priv->acc_duration = 0;
828 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
829 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
830 parse->priv->first_frame_offset = -1;
831 parse->priv->estimated_duration = -1;
832 parse->priv->estimated_drift = 0;
833 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
834 parse->priv->next_dts = 0;
835 parse->priv->syncable = TRUE;
836 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
837 parse->priv->passthrough = FALSE;
838 parse->priv->pts_interpolate = TRUE;
839 parse->priv->infer_ts = TRUE;
840 parse->priv->has_timing_info = FALSE;
841 parse->priv->min_bitrate = G_MAXUINT;
842 parse->priv->max_bitrate = 0;
843 parse->priv->avg_bitrate = 0;
844 parse->priv->posted_avg_bitrate = 0;
846 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
847 parse->priv->index_last_offset = -1;
848 parse->priv->index_last_valid = TRUE;
849 parse->priv->upstream_seekable = FALSE;
850 parse->priv->upstream_size = 0;
851 parse->priv->upstream_has_duration = FALSE;
852 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
853 parse->priv->idx_interval = 0;
854 parse->priv->idx_byte_interval = 0;
855 parse->priv->exact_position = TRUE;
856 parse->priv->seen_keyframe = FALSE;
857 parse->priv->checked_media = FALSE;
859 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
860 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
861 parse->priv->last_offset = 0;
863 parse->priv->skip = 0;
865 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
867 g_list_free (parse->priv->pending_events);
868 parse->priv->pending_events = NULL;
870 if (parse->priv->cache) {
871 gst_buffer_unref (parse->priv->cache);
872 parse->priv->cache = NULL;
875 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
876 g_slist_free (parse->priv->pending_seeks);
877 parse->priv->pending_seeks = NULL;
879 if (parse->priv->adapter)
880 gst_adapter_clear (parse->priv->adapter);
882 gst_base_parse_set_upstream_tags (parse, NULL);
884 if (parse->priv->parser_tags) {
885 gst_tag_list_unref (parse->priv->parser_tags);
886 parse->priv->parser_tags = NULL;
888 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
890 parse->priv->new_frame = TRUE;
892 parse->priv->first_buffer = TRUE;
894 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
895 g_list_free (parse->priv->detect_buffers);
896 parse->priv->detect_buffers = NULL;
897 parse->priv->detect_buffers_size = 0;
898 GST_OBJECT_UNLOCK (parse);
902 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
904 gboolean got_tag = FALSE;
907 if (parse->priv->upstream_tags != NULL)
908 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
910 if (!got_tag && parse->priv->parser_tags != NULL)
911 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
916 /* check if upstream or subclass tags contain bitrates already */
918 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
920 parse->priv->post_min_bitrate =
921 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
922 parse->priv->post_avg_bitrate =
923 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
924 parse->priv->post_max_bitrate =
925 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
928 /* Queues new tag event with the current combined state of the stream tags
929 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
931 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
933 GstTagList *merged_tags;
935 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
936 parse->priv->upstream_tags);
937 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
938 parse->priv->parser_tags);
939 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
942 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
943 parse->priv->parser_tags_merge_mode);
945 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
947 if (merged_tags == NULL)
950 if (gst_tag_list_is_empty (merged_tags)) {
951 gst_tag_list_unref (merged_tags);
955 if (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE) {
956 /* only add bitrate tags to non-empty taglists for now, and only if neither
957 * upstream tags nor the subclass sets the bitrate tag in question already */
958 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
959 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
960 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
961 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
963 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
964 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
965 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
966 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
968 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
969 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
970 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
971 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
972 GST_TAG_BITRATE, parse->priv->avg_bitrate, NULL);
976 parse->priv->pending_events =
977 g_list_prepend (parse->priv->pending_events,
978 gst_event_new_tag (merged_tags));
981 /* gst_base_parse_parse_frame:
982 * @parse: #GstBaseParse.
983 * @buffer: #GstBuffer.
985 * Default callback for parse_frame.
988 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
990 GstBuffer *buffer = frame->buffer;
992 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
993 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
994 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
996 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
997 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
998 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
1000 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
1001 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
1002 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
1007 /* gst_base_parse_convert:
1008 * @parse: #GstBaseParse.
1009 * @src_format: #GstFormat describing the source format.
1010 * @src_value: Source value to be converted.
1011 * @dest_format: #GstFormat defining the converted format.
1012 * @dest_value: Pointer where the conversion result will be put.
1014 * Converts using configured "convert" vmethod in #GstBaseParse class.
1016 * Returns: %TRUE if conversion was successful.
1019 gst_base_parse_convert (GstBaseParse * parse,
1020 GstFormat src_format,
1021 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1023 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1026 g_return_val_if_fail (dest_value != NULL, FALSE);
1028 if (!klass->convert)
1031 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
1033 #ifndef GST_DISABLE_GST_DEBUG
1036 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1037 GST_LOG_OBJECT (parse,
1038 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1039 GST_TIME_ARGS (src_value), *dest_value);
1040 } else if (dest_format == GST_FORMAT_TIME &&
1041 src_format == GST_FORMAT_BYTES) {
1042 GST_LOG_OBJECT (parse,
1043 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1044 src_value, GST_TIME_ARGS (*dest_value));
1046 GST_LOG_OBJECT (parse,
1047 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1048 GST_STR_NULL (gst_format_get_name (src_format)),
1049 GST_STR_NULL (gst_format_get_name (dest_format)),
1050 src_value, *dest_value);
1053 GST_DEBUG_OBJECT (parse, "conversion failed");
1062 update_upstream_provided (GQuark field_id, const GValue * value,
1065 GstCaps *default_caps = user_data;
1069 caps_size = gst_caps_get_size (default_caps);
1070 for (i = 0; i < caps_size; i++) {
1071 GstStructure *structure = gst_caps_get_structure (default_caps, i);
1072 if (gst_structure_id_has_field (structure, field_id))
1073 gst_structure_id_set_value (structure, field_id, value);
1080 gst_base_parse_negotiate_default_caps (GstBaseParse * parse)
1082 GstCaps *caps, *templcaps;
1083 GstCaps *sinkcaps = NULL;
1084 GstCaps *default_caps = NULL;
1085 GstStructure *structure;
1087 templcaps = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD (parse));
1088 caps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), templcaps);
1090 gst_caps_unref (templcaps);
1095 if (!caps || gst_caps_is_empty (caps) || gst_caps_is_any (caps)) {
1099 GST_LOG_OBJECT (parse, "peer caps %" GST_PTR_FORMAT, caps);
1101 /* before fixating, try to use whatever upstream provided */
1102 default_caps = gst_caps_copy (caps);
1103 sinkcaps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
1105 GST_LOG_OBJECT (parse, "current caps %" GST_PTR_FORMAT " for sinkpad",
1109 structure = gst_caps_get_structure (sinkcaps, 0);
1110 gst_structure_foreach (structure, update_upstream_provided, default_caps);
1113 default_caps = gst_caps_fixate (default_caps);
1115 if (!default_caps) {
1116 GST_WARNING_OBJECT (parse, "Failed to create default caps !");
1120 GST_INFO_OBJECT (parse,
1121 "Chose default caps %" GST_PTR_FORMAT " for initial gap", default_caps);
1123 gst_caps_unref (sinkcaps);
1124 gst_caps_unref (caps);
1126 return default_caps;
1131 gst_caps_unref (caps);
1133 gst_caps_unref (sinkcaps);
1138 /* gst_base_parse_sink_event:
1139 * @pad: #GstPad that received the event.
1140 * @event: #GstEvent to be handled.
1142 * Handler for sink pad events.
1144 * Returns: %TRUE if the event was handled.
1147 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1149 GstBaseParse *parse = GST_BASE_PARSE (parent);
1150 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1153 ret = bclass->sink_event (parse, event);
1158 /* gst_base_parse_sink_event_default:
1159 * @parse: #GstBaseParse.
1160 * @event: #GstEvent to be handled.
1162 * Element-level event handler function.
1164 * The event will be unreffed only if it has been handled and this
1165 * function returns %TRUE
1167 * Returns: %TRUE if the event was handled and not need forwarding.
1170 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1172 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1173 gboolean ret = FALSE;
1174 gboolean forward_immediate = FALSE;
1176 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1177 GST_EVENT_TYPE_NAME (event));
1179 switch (GST_EVENT_TYPE (event)) {
1180 case GST_EVENT_CAPS:
1184 gst_event_parse_caps (event, &caps);
1185 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1187 if (klass->set_sink_caps)
1188 ret = klass->set_sink_caps (parse, caps);
1192 /* will send our own caps downstream */
1193 gst_event_unref (event);
1197 case GST_EVENT_SEGMENT:
1199 const GstSegment *in_segment;
1200 GstSegment out_segment;
1201 gint64 offset = 0, next_dts;
1202 guint32 seqnum = gst_event_get_seqnum (event);
1204 gst_event_parse_segment (event, &in_segment);
1205 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1206 out_segment.rate = in_segment->rate;
1207 out_segment.applied_rate = in_segment->applied_rate;
1209 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1211 parse->priv->upstream_format = in_segment->format;
1212 if (in_segment->format == GST_FORMAT_BYTES) {
1213 GstBaseParseSeek *seek = NULL;
1216 /* stop time is allowed to be open-ended, but not start & pos */
1217 offset = in_segment->time;
1219 GST_OBJECT_LOCK (parse);
1220 for (node = parse->priv->pending_seeks; node; node = node->next) {
1221 GstBaseParseSeek *tmp = node->data;
1223 if (tmp->offset == offset) {
1228 parse->priv->pending_seeks =
1229 g_slist_remove (parse->priv->pending_seeks, seek);
1230 GST_OBJECT_UNLOCK (parse);
1233 GST_DEBUG_OBJECT (parse,
1234 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1235 seek->accurate ? " accurate" : "", &seek->segment);
1237 out_segment.start = seek->segment.start;
1238 out_segment.stop = seek->segment.stop;
1239 out_segment.time = seek->segment.start;
1241 next_dts = seek->start_ts;
1242 parse->priv->exact_position = seek->accurate;
1245 /* best attempt convert */
1246 /* as these are only estimates, stop is kept open-ended to avoid
1247 * premature cutting */
1248 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1249 GST_FORMAT_TIME, (gint64 *) & next_dts);
1251 out_segment.start = next_dts;
1252 out_segment.stop = GST_CLOCK_TIME_NONE;
1253 out_segment.time = next_dts;
1255 parse->priv->exact_position = (in_segment->start == 0);
1258 gst_event_unref (event);
1260 event = gst_event_new_segment (&out_segment);
1261 gst_event_set_seqnum (event, seqnum);
1263 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1264 GST_SEGMENT_FORMAT, in_segment);
1266 } else if (in_segment->format != GST_FORMAT_TIME) {
1267 /* Unknown incoming segment format. Output a default open-ended
1269 gst_event_unref (event);
1271 out_segment.start = 0;
1272 out_segment.stop = GST_CLOCK_TIME_NONE;
1273 out_segment.time = 0;
1275 event = gst_event_new_segment (&out_segment);
1276 gst_event_set_seqnum (event, seqnum);
1280 /* not considered BYTE seekable if it is talking to us in TIME,
1281 * whatever else it might claim */
1282 parse->priv->upstream_seekable = FALSE;
1283 next_dts = in_segment->start;
1284 gst_event_copy_segment (event, &out_segment);
1287 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1290 gst_segment_set_newsegment (&parse->segment, update, rate,
1291 applied_rate, format, start, stop, start);
1296 /* save the segment for later, right before we push a new buffer so that
1297 * the caps are fixed and the next linked element can receive
1298 * the segment but finish the current segment */
1299 GST_DEBUG_OBJECT (parse, "draining current segment");
1300 if (in_segment->rate > 0.0)
1301 gst_base_parse_drain (parse);
1303 gst_base_parse_finish_fragment (parse, FALSE);
1304 gst_adapter_clear (parse->priv->adapter);
1306 parse->priv->offset = offset;
1307 parse->priv->sync_offset = offset;
1308 parse->priv->next_dts = next_dts;
1309 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1310 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1311 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1312 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1313 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1314 parse->priv->prev_dts_from_pts = FALSE;
1315 parse->priv->discont = TRUE;
1316 parse->priv->seen_keyframe = FALSE;
1317 parse->priv->skip = 0;
1321 case GST_EVENT_SEGMENT_DONE:
1322 /* need to drain now, rather than upon a new segment,
1323 * since that would have SEGMENT_DONE come before potential
1324 * delayed last part of the current segment */
1325 GST_DEBUG_OBJECT (parse, "draining current segment");
1326 if (parse->segment.rate > 0.0)
1327 gst_base_parse_drain (parse);
1329 gst_base_parse_finish_fragment (parse, FALSE);
1330 /* Also forward event immediately, there might be no new data
1331 * coming afterwards that would allow us to forward it later */
1332 forward_immediate = TRUE;
1335 case GST_EVENT_FLUSH_START:
1336 GST_OBJECT_LOCK (parse);
1337 parse->priv->flushing = TRUE;
1338 GST_OBJECT_UNLOCK (parse);
1341 case GST_EVENT_FLUSH_STOP:
1342 gst_adapter_clear (parse->priv->adapter);
1343 gst_base_parse_clear_queues (parse);
1344 parse->priv->flushing = FALSE;
1345 parse->priv->discont = TRUE;
1346 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1347 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1348 parse->priv->new_frame = TRUE;
1349 parse->priv->skip = 0;
1351 forward_immediate = TRUE;
1355 if (parse->segment.rate > 0.0)
1356 gst_base_parse_drain (parse);
1358 gst_base_parse_finish_fragment (parse, TRUE);
1360 /* If we STILL have zero frames processed, fire an error */
1361 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1362 !parse->priv->first_buffer) {
1363 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1364 ("No valid frames found before end of stream"), (NULL));
1367 if (!parse->priv->saw_gaps
1368 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1369 /* We've not posted bitrate tags yet - do so now */
1370 gst_base_parse_queue_tag_event_update (parse);
1373 /* newsegment and other serialized events before eos */
1374 gst_base_parse_push_pending_events (parse);
1376 forward_immediate = TRUE;
1378 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1379 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1380 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1381 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1384 const GstStructure *s;
1385 gboolean ev_still_state;
1387 s = gst_event_get_structure (event);
1389 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1390 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1391 if (ev_still_state) {
1392 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1393 if (parse->segment.rate > 0.0)
1394 gst_base_parse_drain (parse);
1396 gst_base_parse_finish_fragment (parse, TRUE);
1398 forward_immediate = TRUE;
1404 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1406 /* Ensure we have caps before forwarding the event */
1407 if (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (parse))) {
1408 GstCaps *default_caps = NULL;
1409 if ((default_caps = gst_base_parse_negotiate_default_caps (parse))) {
1411 GstEvent *caps_event = gst_event_new_caps (default_caps);
1413 GST_DEBUG_OBJECT (parse,
1414 "Store caps event to pending list for initial pre-rolling");
1416 /* Events are in decreasing order. Go down the list until we
1417 * find the first pre-CAPS event and insert our CAPS event there.
1419 * There should be a SEGMENT event already, which is > CAPS */
1420 for (l = parse->priv->pending_events; l; l = l->next) {
1421 GstEvent *e = l->data;
1423 if (GST_EVENT_TYPE (e) < GST_EVENT_CAPS) {
1424 parse->priv->pending_events =
1425 g_list_insert_before (parse->priv->pending_events, l,
1430 /* No pending event that is < CAPS, so we have to add it at the very
1431 * end of the list */
1433 parse->priv->pending_events =
1434 g_list_append (parse->priv->pending_events, caps_event);
1436 gst_caps_unref (default_caps);
1438 gst_event_unref (event);
1441 GST_ELEMENT_ERROR (parse, STREAM, FORMAT, (NULL),
1442 ("Parser output not negotiated before GAP event."));
1447 gst_base_parse_push_pending_events (parse);
1449 if (parse->segment.rate > 0.0)
1450 gst_base_parse_drain (parse);
1452 gst_base_parse_finish_fragment (parse, TRUE);
1453 forward_immediate = TRUE;
1454 parse->priv->saw_gaps = TRUE;
1459 GstTagList *tags = NULL;
1461 gst_event_parse_tag (event, &tags);
1463 /* We only care about stream tags here, global tags we just forward */
1464 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1467 gst_base_parse_set_upstream_tags (parse, tags);
1468 gst_base_parse_queue_tag_event_update (parse);
1469 parse->priv->tags_changed = FALSE;
1470 gst_event_unref (event);
1475 case GST_EVENT_STREAM_START:
1477 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1478 forward_immediate = TRUE;
1480 gst_base_parse_set_upstream_tags (parse, NULL);
1481 parse->priv->tags_changed = TRUE;
1488 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1489 * For EOS this is required because no buffer or serialized event
1490 * will come after EOS and nothing could trigger another
1491 * _finish_frame() call. *
1492 * If the subclass handles sending of EOS manually it can return
1493 * _DROPPED from ::finish() and all other subclasses should have
1494 * decoded/flushed all remaining data before this
1496 * For FLUSH_STOP this is required because it is expected
1497 * to be forwarded immediately and no buffers are queued anyway.
1500 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1501 ret = gst_pad_push_event (parse->srcpad, event);
1503 parse->priv->pending_events =
1504 g_list_prepend (parse->priv->pending_events, event);
1509 GST_DEBUG_OBJECT (parse, "event handled");
1515 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1520 pad = GST_BASE_PARSE_SINK_PAD (parse);
1522 switch (GST_QUERY_TYPE (query)) {
1523 case GST_QUERY_CAPS:
1525 GstBaseParseClass *bclass;
1527 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1529 if (bclass->get_sink_caps) {
1530 GstCaps *caps, *filter;
1532 gst_query_parse_caps (query, &filter);
1533 caps = bclass->get_sink_caps (parse, filter);
1534 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1536 gst_query_set_caps_result (query, caps);
1537 gst_caps_unref (caps);
1541 GstCaps *caps, *template_caps, *filter;
1543 gst_query_parse_caps (query, &filter);
1544 template_caps = gst_pad_get_pad_template_caps (pad);
1545 if (filter != NULL) {
1547 gst_caps_intersect_full (filter, template_caps,
1548 GST_CAPS_INTERSECT_FIRST);
1549 gst_caps_unref (template_caps);
1551 caps = template_caps;
1553 gst_query_set_caps_result (query, caps);
1554 gst_caps_unref (caps);
1562 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1571 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1573 GstBaseParseClass *bclass;
1574 GstBaseParse *parse;
1577 parse = GST_BASE_PARSE (parent);
1578 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1580 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1582 if (bclass->sink_query)
1583 ret = bclass->sink_query (parse, query);
1587 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1588 GST_QUERY_TYPE_NAME (query), ret, query);
1594 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1596 GstBaseParseClass *bclass;
1597 GstBaseParse *parse;
1600 parse = GST_BASE_PARSE (parent);
1601 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1603 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1604 GST_QUERY_TYPE_NAME (query), query);
1606 if (bclass->src_query)
1607 ret = bclass->src_query (parse, query);
1611 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1612 GST_QUERY_TYPE_NAME (query), ret, query);
1617 /* gst_base_parse_src_event:
1618 * @pad: #GstPad that received the event.
1619 * @event: #GstEvent that was received.
1621 * Handler for source pad events.
1623 * Returns: %TRUE if the event was handled.
1626 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1628 GstBaseParse *parse;
1629 GstBaseParseClass *bclass;
1630 gboolean ret = TRUE;
1632 parse = GST_BASE_PARSE (parent);
1633 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1635 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1636 GST_EVENT_TYPE_NAME (event));
1638 if (bclass->src_event)
1639 ret = bclass->src_event (parse, event);
1641 gst_event_unref (event);
1647 gst_base_parse_is_seekable (GstBaseParse * parse)
1649 /* FIXME: could do more here, e.g. check index or just send data from 0
1650 * in pull mode and let decoder/sink clip */
1651 return parse->priv->syncable;
1654 /* gst_base_parse_src_event_default:
1655 * @parse: #GstBaseParse.
1656 * @event: #GstEvent that was received.
1658 * Default srcpad event handler.
1660 * Returns: %TRUE if the event was handled and can be dropped.
1663 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1665 gboolean res = FALSE;
1667 switch (GST_EVENT_TYPE (event)) {
1668 case GST_EVENT_SEEK:
1669 if (gst_base_parse_is_seekable (parse))
1670 res = gst_base_parse_handle_seek (parse, event);
1673 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1682 * gst_base_parse_convert_default:
1683 * @parse: #GstBaseParse.
1684 * @src_format: #GstFormat describing the source format.
1685 * @src_value: Source value to be converted.
1686 * @dest_format: #GstFormat defining the converted format.
1687 * @dest_value: Pointer where the conversion result will be put.
1689 * Default implementation of "convert" vmethod in #GstBaseParse class.
1691 * Returns: %TRUE if conversion was successful.
1694 gst_base_parse_convert_default (GstBaseParse * parse,
1695 GstFormat src_format,
1696 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1698 gboolean ret = FALSE;
1699 guint64 bytes, duration;
1701 if (G_UNLIKELY (src_format == dest_format)) {
1702 *dest_value = src_value;
1706 if (G_UNLIKELY (src_value == -1)) {
1711 if (G_UNLIKELY (src_value == 0)) {
1716 /* need at least some frames */
1717 if (!parse->priv->framecount)
1720 duration = parse->priv->acc_duration / GST_MSECOND;
1721 bytes = parse->priv->bytecount;
1723 if (G_UNLIKELY (!duration || !bytes))
1724 goto no_duration_bytes;
1726 if (src_format == GST_FORMAT_BYTES) {
1727 if (dest_format == GST_FORMAT_TIME) {
1728 /* BYTES -> TIME conversion */
1729 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1730 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1731 *dest_value *= GST_MSECOND;
1732 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1733 *dest_value / GST_MSECOND);
1736 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1738 } else if (src_format == GST_FORMAT_TIME) {
1739 if (dest_format == GST_FORMAT_BYTES) {
1740 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1741 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1743 GST_DEBUG_OBJECT (parse,
1744 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1745 src_value / GST_MSECOND, *dest_value);
1748 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1750 } else if (src_format == GST_FORMAT_DEFAULT) {
1751 /* DEFAULT == frame-based */
1752 if (dest_format == GST_FORMAT_TIME) {
1753 GST_DEBUG_OBJECT (parse, "converting default -> time");
1754 if (parse->priv->fps_den) {
1755 *dest_value = gst_util_uint64_scale (src_value,
1756 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1760 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1763 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1770 GST_DEBUG_OBJECT (parse, "no framecount");
1775 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1776 G_GUINT64_FORMAT, duration, bytes);
1783 gst_base_parse_update_duration (GstBaseParse * parse)
1785 gint64 ptot, dest_value;
1787 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1790 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1791 GST_FORMAT_TIME, &dest_value))
1794 /* inform if duration changed, but try to avoid spamming */
1795 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1797 parse->priv->estimated_duration = dest_value;
1798 GST_LOG_OBJECT (parse,
1799 "updated estimated duration to %" GST_TIME_FORMAT,
1800 GST_TIME_ARGS (dest_value));
1802 if (parse->priv->estimated_drift > GST_SECOND ||
1803 parse->priv->estimated_drift < -GST_SECOND) {
1804 gst_element_post_message (GST_ELEMENT (parse),
1805 gst_message_new_duration_changed (GST_OBJECT (parse)));
1806 parse->priv->estimated_drift = 0;
1810 /* gst_base_parse_update_bitrates:
1811 * @parse: #GstBaseParse.
1812 * @buffer: Current frame as a #GstBuffer
1814 * Keeps track of the minimum and maximum bitrates, and also maintains a
1815 * running average bitrate of the stream so far.
1818 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1820 guint64 data_len, frame_dur;
1821 gint overhead, frame_bitrate;
1822 GstBuffer *buffer = frame->buffer;
1824 overhead = frame->overhead;
1828 data_len = gst_buffer_get_size (buffer) - overhead;
1829 parse->priv->data_bytecount += data_len;
1831 /* duration should be valid by now,
1832 * either set by subclass or maybe based on fps settings */
1833 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1834 /* Calculate duration of a frame from buffer properties */
1835 frame_dur = GST_BUFFER_DURATION (buffer);
1836 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1837 parse->priv->acc_duration;
1840 /* No way to figure out frame duration (is this even possible?) */
1844 /* override if subclass provided bitrate, e.g. metadata based */
1845 if (parse->priv->bitrate) {
1846 parse->priv->avg_bitrate = parse->priv->bitrate;
1847 /* spread this (confirmed) info ASAP */
1848 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1849 parse->priv->tags_changed = TRUE;
1853 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1857 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1858 parse->priv->avg_bitrate);
1860 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1863 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1864 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1865 || parse->priv->post_max_bitrate))
1866 parse->priv->tags_changed = TRUE;
1868 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1869 if (frame_bitrate < parse->priv->min_bitrate) {
1870 parse->priv->min_bitrate = frame_bitrate;
1871 if (parse->priv->post_min_bitrate)
1872 parse->priv->tags_changed = TRUE;
1875 if (frame_bitrate > parse->priv->max_bitrate) {
1876 parse->priv->max_bitrate = frame_bitrate;
1877 if (parse->priv->post_max_bitrate)
1878 parse->priv->tags_changed = TRUE;
1881 /* Only update the tag on a 2% change */
1882 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1883 guint64 diffprev = gst_util_uint64_scale_int (100,
1884 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1885 parse->priv->avg_bitrate);
1886 if (diffprev >= UPDATE_THRESHOLD)
1887 parse->priv->tags_changed = TRUE;
1893 * gst_base_parse_add_index_entry:
1894 * @parse: #GstBaseParse.
1895 * @offset: offset of entry
1896 * @ts: timestamp associated with offset
1897 * @key: whether entry refers to keyframe
1898 * @force: add entry disregarding sanity checks
1900 * Adds an entry to the index associating @offset to @ts. It is recommended
1901 * to only add keyframe entries. @force allows to bypass checks, such as
1902 * whether the stream is (upstream) seekable, another entry is already "close"
1903 * to the new entry, etc.
1905 * Returns: #gboolean indicating whether entry was added
1908 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1909 GstClockTime ts, gboolean key, gboolean force)
1911 gboolean ret = FALSE;
1912 GstIndexAssociation associations[2];
1914 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1915 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1917 if (G_LIKELY (!force)) {
1919 if (!parse->priv->upstream_seekable) {
1920 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1924 /* FIXME need better helper data structure that handles these issues
1925 * related to ongoing collecting of index entries */
1926 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1928 GST_LOG_OBJECT (parse,
1929 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1930 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1934 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1935 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1936 parse->priv->idx_interval) {
1937 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1938 GST_TIME_ARGS (parse->priv->index_last_ts));
1942 /* if last is not really the last one */
1943 if (!parse->priv->index_last_valid) {
1944 GstClockTime prev_ts;
1946 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1947 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1948 GST_LOG_OBJECT (parse,
1949 "entry too close to existing entry %" GST_TIME_FORMAT,
1950 GST_TIME_ARGS (prev_ts));
1951 parse->priv->index_last_offset = offset;
1952 parse->priv->index_last_ts = ts;
1958 associations[0].format = GST_FORMAT_TIME;
1959 associations[0].value = ts;
1960 associations[1].format = GST_FORMAT_BYTES;
1961 associations[1].value = offset;
1963 /* index might change on-the-fly, although that would be nutty app ... */
1964 GST_BASE_PARSE_INDEX_LOCK (parse);
1965 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1966 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1967 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1968 (const GstIndexAssociation *) &associations);
1969 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1972 parse->priv->index_last_offset = offset;
1973 parse->priv->index_last_ts = ts;
1982 /* check for seekable upstream, above and beyond a mere query */
1984 gst_base_parse_check_seekability (GstBaseParse * parse)
1987 gboolean seekable = FALSE;
1988 gint64 start = -1, stop = -1;
1989 guint idx_interval = 0;
1990 guint64 idx_byte_interval = 0;
1992 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1993 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1994 GST_DEBUG_OBJECT (parse, "seeking query failed");
1998 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
2000 /* try harder to query upstream size if we didn't get it the first time */
2001 if (seekable && stop == -1) {
2002 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
2003 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
2006 /* if upstream doesn't know the size, it's likely that it's not seekable in
2007 * practice even if it technically may be seekable */
2008 if (seekable && (start != 0 || stop <= start)) {
2009 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
2013 /* let's not put every single frame into our index */
2015 if (stop < 10 * 1024 * 1024)
2017 else if (stop < 100 * 1024 * 1024)
2020 idx_interval = 1000;
2022 /* ensure that even for large files (e.g. very long audio files), the index
2023 * stays reasonably-size, with some arbitrary limit to the total number of
2025 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
2026 GST_DEBUG_OBJECT (parse,
2027 "Limiting index entries to %d, indexing byte interval %"
2028 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
2032 gst_query_unref (query);
2034 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
2035 G_GUINT64_FORMAT ")", seekable, start, stop);
2036 parse->priv->upstream_seekable = seekable;
2037 parse->priv->upstream_size = seekable ? stop : 0;
2039 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
2040 parse->priv->idx_interval = idx_interval * GST_MSECOND;
2041 parse->priv->idx_byte_interval = idx_byte_interval;
2044 /* some misc checks on upstream */
2046 gst_base_parse_check_upstream (GstBaseParse * parse)
2050 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
2051 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
2052 /* upstream has one, accept it also, and no further updates */
2053 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
2054 parse->priv->upstream_has_duration = TRUE;
2057 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
2058 parse->priv->upstream_has_duration);
2061 /* checks src caps to determine if dealing with audio or video */
2062 /* TODO maybe forego automagic stuff and let subclass configure it ? */
2064 gst_base_parse_check_media (GstBaseParse * parse)
2069 caps = gst_pad_get_current_caps (parse->srcpad);
2070 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
2071 parse->priv->is_video =
2072 g_str_has_prefix (gst_structure_get_name (s), "video");
2074 /* historical default */
2075 parse->priv->is_video = FALSE;
2078 gst_caps_unref (caps);
2080 parse->priv->checked_media = TRUE;
2081 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
2084 /* takes ownership of frame */
2086 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2088 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2089 /* frame allocated on the heap, we can just take ownership */
2090 g_queue_push_tail (&parse->priv->queued_frames, frame);
2091 GST_TRACE ("queued frame %p", frame);
2093 GstBaseParseFrame *copy;
2095 /* probably allocated on the stack, must make a proper copy */
2096 copy = gst_base_parse_frame_copy (frame);
2097 g_queue_push_tail (&parse->priv->queued_frames, copy);
2098 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2099 gst_base_parse_frame_free (frame);
2103 /* makes sure that @buf is properly prepared and decorated for passing
2104 * to baseclass, and an equally setup frame is returned setup with @buf.
2105 * Takes ownership of @buf. */
2106 static GstBaseParseFrame *
2107 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2109 GstBaseParseFrame *frame = NULL;
2111 buffer = gst_buffer_make_writable (buffer);
2113 GST_LOG_OBJECT (parse,
2114 "preparing frame at offset %" G_GUINT64_FORMAT
2115 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2116 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2117 gst_buffer_get_size (buffer));
2119 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2121 gst_base_parse_update_flags (parse);
2123 frame = gst_base_parse_frame_new (buffer, 0, 0);
2124 gst_buffer_unref (buffer);
2125 gst_base_parse_update_frame (parse, frame);
2127 /* clear flags for next frame */
2128 parse->priv->discont = FALSE;
2129 parse->priv->new_frame = FALSE;
2131 /* use default handler to provide initial (upstream) metadata */
2132 gst_base_parse_parse_frame (parse, frame);
2137 /* Wraps buffer in a frame and dispatches to subclass.
2138 * Also manages data skipping and offset handling (including adapter flushing).
2139 * Takes ownership of @buffer */
2140 static GstFlowReturn
2141 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2142 gint * skip, gint * flushed)
2144 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2145 GstBaseParseFrame *frame;
2148 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2150 GST_LOG_OBJECT (parse,
2151 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2152 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2153 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2154 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2155 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2157 /* track what is being flushed during this single round of frame processing */
2158 parse->priv->flushed = 0;
2161 /* make it easy for _finish_frame to pick up input data */
2162 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2163 gst_buffer_ref (buffer);
2164 gst_adapter_push (parse->priv->adapter, buffer);
2167 frame = gst_base_parse_prepare_frame (parse, buffer);
2168 ret = klass->handle_frame (parse, frame, skip);
2170 *flushed = parse->priv->flushed;
2172 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2175 /* subclass can only do one of these, or semantics are too unclear */
2176 g_assert (*skip == 0 || *flushed == 0);
2178 /* track skipping */
2180 GstClockTime pts, dts;
2183 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2184 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2185 /* reverse playback, and no frames found yet, so we are skipping
2186 * the leading part of a fragment, which may form the tail of
2187 * fragment coming later, hopefully subclass skips efficiently ... */
2188 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2189 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2190 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2191 outbuf = gst_buffer_make_writable (outbuf);
2192 GST_BUFFER_PTS (outbuf) = pts;
2193 GST_BUFFER_DTS (outbuf) = dts;
2194 parse->priv->buffers_head =
2195 g_slist_prepend (parse->priv->buffers_head, outbuf);
2198 /* If we're asked to skip more than is available in the adapter,
2199 we need to remember what we need to skip for next iteration */
2200 gsize av = gst_adapter_available (parse->priv->adapter);
2201 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2203 gst_adapter_flush (parse->priv->adapter, *skip);
2206 ("This is more than available, flushing %" G_GSIZE_FORMAT
2207 ", storing %u to skip", av, (guint) (*skip - av));
2208 parse->priv->skip = *skip - av;
2209 gst_adapter_flush (parse->priv->adapter, av);
2213 if (!parse->priv->discont)
2214 parse->priv->sync_offset = parse->priv->offset;
2215 parse->priv->offset += *skip;
2216 parse->priv->discont = TRUE;
2217 /* check for indefinite skipping */
2218 if (ret == GST_FLOW_OK)
2219 ret = gst_base_parse_check_sync (parse);
2222 parse->priv->offset += *flushed;
2224 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2225 gst_adapter_clear (parse->priv->adapter);
2228 if (*skip == 0 && *flushed == 0) {
2229 /* Carry over discont if we need more data */
2230 if (GST_BUFFER_IS_DISCONT (frame->buffer))
2231 parse->priv->discont = TRUE;
2234 gst_base_parse_frame_free (frame);
2239 /* gst_base_parse_push_pending_events:
2240 * @parse: #GstBaseParse
2242 * Pushes the pending events
2245 gst_base_parse_push_pending_events (GstBaseParse * parse)
2247 if (G_UNLIKELY (parse->priv->pending_events)) {
2248 GList *r = g_list_reverse (parse->priv->pending_events);
2251 parse->priv->pending_events = NULL;
2252 for (l = r; l != NULL; l = l->next) {
2253 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2259 /* gst_base_parse_handle_and_push_frame:
2260 * @parse: #GstBaseParse.
2261 * @klass: #GstBaseParseClass.
2262 * @frame: (transfer full): a #GstBaseParseFrame
2264 * Parses the frame from given buffer and pushes it forward. Also performs
2265 * timestamp handling and checks the segment limits.
2267 * This is called with srcpad STREAM_LOCK held.
2269 * Returns: #GstFlowReturn
2271 static GstFlowReturn
2272 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2273 GstBaseParseFrame * frame)
2278 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2280 buffer = frame->buffer;
2281 offset = frame->offset;
2283 /* check if subclass/format can provide ts.
2284 * If so, that allows and enables extra seek and duration determining options */
2285 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2286 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2287 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2288 parse->priv->first_frame_offset = offset;
2289 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2290 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2291 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2292 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2293 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2294 GST_TIME_ARGS (parse->priv->first_frame_pts),
2295 parse->priv->first_frame_offset);
2296 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2298 GstClockTime last_ts = G_MAXINT64;
2300 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2301 gst_base_parse_locate_time (parse, &last_ts, &off);
2302 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2303 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2306 /* disable further checks */
2307 parse->priv->first_frame_offset = 0;
2311 /* track upstream time if provided, not subclass' internal notion of it */
2312 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2313 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2314 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2317 /* interpolating and no valid pts yet,
2318 * start with dts and carry on from there */
2319 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2320 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2321 parse->priv->next_pts = parse->priv->next_dts;
2323 /* again use default handler to add missing metadata;
2324 * we may have new information on frame properties */
2325 gst_base_parse_parse_frame (parse, frame);
2327 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2328 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2329 parse->priv->next_dts =
2330 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2331 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2332 GstClockTime next_pts =
2333 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2334 if (next_pts >= parse->priv->next_dts)
2335 parse->priv->next_pts = next_pts;
2338 /* we lost track, do not produce bogus time next time around
2339 * (probably means parser subclass has given up on parsing as well) */
2340 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2341 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2344 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2345 GST_BUFFER_PTS_IS_VALID (buffer))
2346 gst_base_parse_add_index_entry (parse, offset,
2347 GST_BUFFER_PTS (buffer),
2348 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2350 /* All OK, push queued frames if there are any */
2351 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2352 GstBaseParseFrame *queued_frame;
2354 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2355 gst_base_parse_push_frame (parse, queued_frame);
2356 gst_base_parse_frame_free (queued_frame);
2360 return gst_base_parse_push_frame (parse, frame);
2364 * gst_base_parse_push_frame:
2365 * @parse: #GstBaseParse.
2366 * @frame: (transfer none): a #GstBaseParseFrame
2368 * Pushes the frame's buffer downstream, sends any pending events and
2369 * does some timestamp and segment handling. Takes ownership of
2370 * frame's buffer, though caller retains ownership of @frame.
2372 * This must be called with sinkpad STREAM_LOCK held.
2374 * Returns: #GstFlowReturn
2377 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2379 GstFlowReturn ret = GST_FLOW_OK;
2380 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2381 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2382 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2386 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2387 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2389 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2391 buffer = frame->buffer;
2393 GST_LOG_OBJECT (parse,
2394 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2395 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2396 gst_buffer_get_size (buffer),
2397 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2398 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2399 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2402 parse->priv->bytecount += frame->size;
2403 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2404 parse->priv->framecount++;
2405 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2406 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2409 /* 0 means disabled */
2410 if (parse->priv->update_interval < 0)
2411 parse->priv->update_interval = 50;
2412 else if (parse->priv->update_interval > 0 &&
2413 (parse->priv->framecount % parse->priv->update_interval) == 0)
2414 gst_base_parse_update_duration (parse);
2416 if (GST_BUFFER_PTS_IS_VALID (buffer))
2417 last_start = last_stop = GST_BUFFER_PTS (buffer);
2418 if (last_start != GST_CLOCK_TIME_NONE
2419 && GST_BUFFER_DURATION_IS_VALID (buffer))
2420 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2422 /* should have caps by now */
2423 if (!gst_pad_has_current_caps (parse->srcpad))
2426 if (G_UNLIKELY (!parse->priv->checked_media)) {
2427 /* have caps; check identity */
2428 gst_base_parse_check_media (parse);
2431 if (parse->priv->tags_changed) {
2432 gst_base_parse_queue_tag_event_update (parse);
2433 parse->priv->tags_changed = FALSE;
2436 /* Push pending events, including SEGMENT events */
2437 gst_base_parse_push_pending_events (parse);
2439 /* segment adjustment magic; only if we are running the whole show */
2440 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2441 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2442 parse->priv->upstream_seekable)) {
2444 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2445 GST_CLOCK_TIME_IS_VALID (last_start)) {
2446 GstClockTimeDiff diff;
2448 /* only send newsegments with increasing start times,
2449 * otherwise if these go back and forth downstream (sinks) increase
2450 * accumulated time and running_time */
2451 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2452 if (G_UNLIKELY (diff > 2 * GST_SECOND
2453 && last_start > parse->segment.start
2454 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2455 || last_start < parse->segment.stop))) {
2457 GST_DEBUG_OBJECT (parse,
2458 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2459 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2460 "Sending updated SEGMENT events", diff,
2461 GST_TIME_ARGS (parse->segment.position),
2462 GST_TIME_ARGS (last_start));
2464 /* skip gap FIXME */
2465 gst_pad_push_event (parse->srcpad,
2466 gst_event_new_segment (&parse->segment));
2468 parse->segment.position = last_start;
2473 /* update bitrates and optionally post corresponding tags
2474 * (following newsegment) */
2475 gst_base_parse_update_bitrates (parse, frame);
2477 if (klass->pre_push_frame) {
2478 ret = klass->pre_push_frame (parse, frame);
2480 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2483 /* Push pending events, if there are any new ones
2484 * like tags added by pre_push_frame */
2485 if (parse->priv->tags_changed) {
2486 gst_base_parse_queue_tag_event_update (parse);
2487 parse->priv->tags_changed = FALSE;
2489 gst_base_parse_push_pending_events (parse);
2491 /* take final ownership of frame buffer */
2492 if (frame->out_buffer) {
2493 buffer = frame->out_buffer;
2494 frame->out_buffer = NULL;
2495 gst_buffer_replace (&frame->buffer, NULL);
2497 buffer = frame->buffer;
2498 frame->buffer = NULL;
2501 /* subclass must play nice */
2502 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2504 size = gst_buffer_get_size (buffer);
2506 parse->priv->seen_keyframe |= parse->priv->is_video &&
2507 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2509 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2510 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2511 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2512 GST_BUFFER_TIMESTAMP (buffer) >
2513 parse->segment.stop + parse->priv->lead_out_ts) {
2514 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2516 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2517 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2518 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2519 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2520 parse->priv->lead_in_ts < parse->segment.start) {
2521 if (parse->priv->seen_keyframe) {
2522 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2525 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2526 ret = GST_BASE_PARSE_FLOW_DROPPED;
2533 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2534 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2535 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
2536 parse->priv->discont = TRUE;
2537 gst_buffer_unref (buffer);
2539 } else if (ret == GST_FLOW_OK) {
2540 if (parse->segment.rate > 0.0) {
2541 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2543 ret = gst_pad_push (parse->srcpad, buffer);
2544 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2545 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2547 /* in backwards playback mode, if on passthrough we need to push buffers
2548 * directly without accumulating them into the buffers_queued as baseparse
2549 * will never check for a DISCONT while on passthrough and those buffers
2550 * will never be pushed.
2552 * also, as we are on reverse playback, it might be possible that
2553 * passthrough might have just been enabled, so make sure to drain the
2554 * buffers_queued list */
2555 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2556 gst_base_parse_finish_fragment (parse, TRUE);
2557 ret = gst_base_parse_send_buffers (parse);
2560 if (ret == GST_FLOW_OK) {
2561 GST_LOG_OBJECT (parse,
2562 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2563 ret = gst_pad_push (parse->srcpad, buffer);
2564 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2565 gst_flow_get_name (ret));
2567 GST_LOG_OBJECT (parse,
2568 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2569 gst_flow_get_name (ret));
2570 gst_buffer_unref (buffer);
2574 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2576 parse->priv->buffers_queued =
2577 g_slist_prepend (parse->priv->buffers_queued, buffer);
2581 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2582 size, gst_flow_get_name (ret));
2583 gst_buffer_unref (buffer);
2584 /* if we are not sufficiently in control, let upstream decide on EOS */
2585 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2586 (parse->priv->passthrough ||
2587 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2588 !parse->priv->upstream_seekable)))
2592 /* Update current running segment position */
2593 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2594 && last_stop != GST_CLOCK_TIME_NONE
2595 && parse->segment.position < last_stop)
2596 parse->segment.position = last_stop;
2603 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2604 return GST_FLOW_FLUSHING;
2606 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2607 return GST_FLOW_ERROR;
2612 * gst_base_parse_finish_frame:
2613 * @parse: a #GstBaseParse
2614 * @frame: a #GstBaseParseFrame
2615 * @size: consumed input data represented by frame
2617 * Collects parsed data and pushes this downstream.
2618 * Source pad caps must be set when this is called.
2620 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2621 * Otherwise, @size samples will be taken from the input and used for output,
2622 * and the output's metadata (timestamps etc) will be taken as (optionally)
2623 * set by the subclass on @frame's (input) buffer (which is otherwise
2624 * ignored for any but the above purpose/information).
2626 * Note that the latter buffer is invalidated by this call, whereas the
2627 * caller retains ownership of @frame.
2629 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2632 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2635 GstFlowReturn ret = GST_FLOW_OK;
2637 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2638 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2639 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2640 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2643 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2644 "flushing size %d", frame->offset, size);
2646 /* some one-time start-up */
2647 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2648 gst_base_parse_check_seekability (parse);
2649 gst_base_parse_check_upstream (parse);
2652 parse->priv->flushed += size;
2654 if (parse->priv->scanning && frame->buffer) {
2655 if (!parse->priv->scanned_frame) {
2656 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2661 /* either PUSH or PULL mode arranges for adapter data */
2662 /* ensure output buffer */
2663 if (!frame->out_buffer) {
2664 GstBuffer *src, *dest;
2666 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2667 dest = frame->out_buffer;
2668 src = frame->buffer;
2669 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2670 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2671 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2672 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2673 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2674 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2676 gst_adapter_flush (parse->priv->adapter, size);
2679 /* use as input for subsequent processing */
2680 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2681 gst_buffer_unref (frame->out_buffer);
2682 frame->out_buffer = NULL;
2684 /* mark input size consumed */
2687 /* subclass might queue frames/data internally if it needs more
2688 * frames to decide on the format, or might request us to queue here. */
2689 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2690 gst_buffer_replace (&frame->buffer, NULL);
2692 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2693 GstBaseParseFrame *copy;
2695 copy = gst_base_parse_frame_copy (frame);
2696 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2697 gst_base_parse_queue_frame (parse, copy);
2701 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2707 /* gst_base_parse_drain:
2709 * Drains the adapter until it is empty. It decreases the min_frame_size to
2710 * match the current adapter size and calls chain method until the adapter
2711 * is emptied or chain returns with error.
2714 gst_base_parse_drain (GstBaseParse * parse)
2718 GST_DEBUG_OBJECT (parse, "draining");
2719 parse->priv->drain = TRUE;
2722 avail = gst_adapter_available (parse->priv->adapter);
2726 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2727 NULL) != GST_FLOW_OK) {
2731 /* nothing changed, maybe due to truncated frame; break infinite loop */
2732 if (avail == gst_adapter_available (parse->priv->adapter)) {
2733 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2734 gst_adapter_clear (parse->priv->adapter);
2738 parse->priv->drain = FALSE;
2741 /* gst_base_parse_send_buffers
2743 * Sends buffers collected in send_buffers downstream, and ensures that list
2744 * is empty at the end (errors or not).
2746 static GstFlowReturn
2747 gst_base_parse_send_buffers (GstBaseParse * parse)
2749 GSList *send = NULL;
2751 GstFlowReturn ret = GST_FLOW_OK;
2752 gboolean first = TRUE;
2754 send = parse->priv->buffers_send;
2758 buf = GST_BUFFER_CAST (send->data);
2759 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2760 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2761 ", offset %" G_GINT64_FORMAT, buf,
2762 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2763 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2764 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2766 /* Make sure the first buffer is always DISCONT. If we split
2767 * GOPs inside the parser this is otherwise not guaranteed */
2769 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2773 /* iterate output queue an push downstream */
2774 ret = gst_pad_push (parse->srcpad, buf);
2775 send = g_slist_delete_link (send, send);
2777 /* clear any leftover if error */
2778 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2780 buf = GST_BUFFER_CAST (send->data);
2781 gst_buffer_unref (buf);
2782 send = g_slist_delete_link (send, send);
2787 parse->priv->buffers_send = send;
2792 /* gst_base_parse_start_fragment:
2794 * Prepares for processing a reverse playback (forward) fragment
2795 * by (re)setting proper state variables.
2797 static GstFlowReturn
2798 gst_base_parse_start_fragment (GstBaseParse * parse)
2800 GST_LOG_OBJECT (parse, "starting fragment");
2802 /* invalidate so no fall-back timestamping is performed;
2803 * ok if taken from subclass or upstream */
2804 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2805 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2806 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2807 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2808 parse->priv->prev_dts_from_pts = FALSE;
2809 /* prevent it hanging around stop all the time */
2810 parse->segment.position = GST_CLOCK_TIME_NONE;
2812 parse->priv->discont = TRUE;
2814 /* head of previous fragment is now pending tail of current fragment */
2815 parse->priv->buffers_pending = parse->priv->buffers_head;
2816 parse->priv->buffers_head = NULL;
2822 /* gst_base_parse_finish_fragment:
2824 * Processes a reverse playback (forward) fragment:
2825 * - append head of last fragment that was skipped to current fragment data
2826 * - drain the resulting current fragment data (i.e. repeated chain)
2827 * - add time/duration (if needed) to frames queued by chain
2828 * - push queued data
2830 static GstFlowReturn
2831 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2834 GstFlowReturn ret = GST_FLOW_OK;
2835 gboolean seen_key = FALSE, seen_delta = FALSE;
2837 GST_LOG_OBJECT (parse, "finishing fragment");
2840 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2841 while (parse->priv->buffers_pending) {
2842 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2844 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2845 gst_buffer_get_size (buf));
2846 gst_adapter_push (parse->priv->adapter, buf);
2848 GST_LOG_OBJECT (parse, "discarding head buffer");
2849 gst_buffer_unref (buf);
2851 parse->priv->buffers_pending =
2852 g_slist_delete_link (parse->priv->buffers_pending,
2853 parse->priv->buffers_pending);
2856 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2857 /* initial skipped data is added to buffers_pending */
2858 gst_base_parse_drain (parse);
2860 if (parse->priv->buffers_send) {
2861 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2862 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2865 /* add metadata (if needed to queued buffers */
2866 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2867 GST_TIME_ARGS (parse->priv->last_pts));
2868 while (parse->priv->buffers_queued) {
2869 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2871 /* no touching if upstream or parsing provided time */
2872 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2873 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2874 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2875 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2876 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2877 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2878 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2880 parse->priv->last_pts = 0;
2881 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2882 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2883 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2885 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2886 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2887 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2889 parse->priv->last_dts = 0;
2890 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2891 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2892 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2895 /* no idea, very bad */
2896 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2899 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2900 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2902 /* reverse order for ascending sending */
2903 /* send downstream at keyframe not preceded by a keyframe
2904 * (e.g. that should identify start of collection of IDR nals) */
2905 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2907 ret = gst_base_parse_send_buffers (parse);
2908 /* if a problem, throw all to sending */
2909 if (ret != GST_FLOW_OK) {
2910 parse->priv->buffers_send =
2911 g_slist_reverse (parse->priv->buffers_queued);
2912 parse->priv->buffers_queued = NULL;
2922 parse->priv->buffers_send =
2923 g_slist_prepend (parse->priv->buffers_send, buf);
2924 parse->priv->buffers_queued =
2925 g_slist_delete_link (parse->priv->buffers_queued,
2926 parse->priv->buffers_queued);
2929 /* audio may have all marked as keyframe, so arrange to send here. Also
2930 * we might have ended the loop above on a keyframe, in which case we
2932 if (!seen_delta || seen_key)
2933 ret = gst_base_parse_send_buffers (parse);
2935 /* any trailing unused no longer usable (ideally none) */
2936 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2937 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2938 gst_adapter_available (parse->priv->adapter));
2939 gst_adapter_clear (parse->priv->adapter);
2945 /* small helper that checks whether we have been trying to resync too long */
2946 static inline GstFlowReturn
2947 gst_base_parse_check_sync (GstBaseParse * parse)
2949 if (G_UNLIKELY (parse->priv->discont &&
2950 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2951 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2952 ("Failed to parse stream"), (NULL));
2953 return GST_FLOW_ERROR;
2959 static GstFlowReturn
2960 gst_base_parse_process_streamheader (GstBaseParse * parse)
2964 const GValue *value;
2965 GstFlowReturn ret = GST_FLOW_OK;
2967 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2971 str = gst_caps_get_structure (caps, 0);
2972 value = gst_structure_get_value (str, "streamheader");
2976 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2978 if (GST_VALUE_HOLDS_ARRAY (value)) {
2980 gsize len = gst_value_array_get_size (value);
2982 for (i = 0; i < len; i++) {
2984 gst_value_get_buffer (gst_value_array_get_value (value, i));
2986 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2987 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2990 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2991 GstBuffer *buffer = gst_value_get_buffer (value);
2993 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2994 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2997 gst_caps_unref (caps);
3004 gst_caps_unref (caps);
3007 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
3012 static GstFlowReturn
3013 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
3015 GstBaseParseClass *bclass;
3016 GstBaseParse *parse;
3017 GstFlowReturn ret = GST_FLOW_OK;
3018 GstFlowReturn old_ret = GST_FLOW_OK;
3019 GstBuffer *tmpbuf = NULL;
3023 GstClockTime pts, dts;
3025 parse = GST_BASE_PARSE (parent);
3026 bclass = GST_BASE_PARSE_GET_CLASS (parse);
3027 GST_DEBUG_OBJECT (parent, "chain");
3029 /* early out for speed, if we need to skip */
3030 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
3031 parse->priv->skip = 0;
3032 if (parse->priv->skip > 0) {
3033 gsize bsize = gst_buffer_get_size (buffer);
3034 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
3036 if (parse->priv->skip >= bsize) {
3037 parse->priv->skip -= bsize;
3038 GST_DEBUG ("All the buffer is skipped");
3039 parse->priv->offset += bsize;
3040 parse->priv->sync_offset = parse->priv->offset;
3043 buffer = gst_buffer_make_writable (buffer);
3044 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
3045 parse->priv->offset += parse->priv->skip;
3046 GST_DEBUG ("Done skipping, we have %u left on this buffer",
3047 (unsigned) (bsize - parse->priv->skip));
3048 parse->priv->skip = 0;
3049 parse->priv->discont = TRUE;
3052 if (G_UNLIKELY (parse->priv->first_buffer)) {
3053 parse->priv->first_buffer = FALSE;
3054 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
3055 /* this stream has no header buffers, check if we just prepend the
3056 * streamheader from caps to the stream */
3057 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
3058 "prepend to the stream");
3059 gst_base_parse_process_streamheader (parse);
3061 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
3062 "streamheader from caps");
3066 if (parse->priv->detecting) {
3067 GstBuffer *detect_buf;
3069 if (parse->priv->detect_buffers_size == 0) {
3070 detect_buf = gst_buffer_ref (buffer);
3075 detect_buf = gst_buffer_new ();
3077 for (l = parse->priv->detect_buffers; l; l = l->next) {
3078 gsize tmpsize = gst_buffer_get_size (l->data);
3080 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
3081 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3085 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3086 offset, gst_buffer_get_size (buffer));
3089 ret = bclass->detect (parse, detect_buf);
3090 gst_buffer_unref (detect_buf);
3092 if (ret == GST_FLOW_OK) {
3095 /* Detected something */
3096 parse->priv->detecting = FALSE;
3098 for (l = parse->priv->detect_buffers; l; l = l->next) {
3099 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3101 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3102 parent, GST_BUFFER_CAST (l->data));
3104 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3106 g_list_free (parse->priv->detect_buffers);
3107 parse->priv->detect_buffers = NULL;
3108 parse->priv->detect_buffers_size = 0;
3110 if (ret != GST_FLOW_OK) {
3114 /* Handle the current buffer */
3115 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3116 /* Still detecting, append buffer or error out if draining */
3118 if (parse->priv->drain) {
3119 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3120 return GST_FLOW_ERROR;
3121 } else if (parse->priv->flushing) {
3122 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3124 g_list_free (parse->priv->detect_buffers);
3125 parse->priv->detect_buffers = NULL;
3126 parse->priv->detect_buffers_size = 0;
3128 parse->priv->detect_buffers =
3129 g_list_append (parse->priv->detect_buffers, buffer);
3130 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3134 /* Something went wrong, subclass responsible for error reporting */
3138 /* And now handle the current buffer if detection worked */
3141 if (G_LIKELY (buffer)) {
3142 GST_LOG_OBJECT (parse,
3143 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3144 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3145 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3146 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3147 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3149 if (G_UNLIKELY (!parse->priv->disable_passthrough
3150 && parse->priv->passthrough)) {
3151 GstBaseParseFrame frame;
3153 gst_base_parse_frame_init (&frame);
3154 frame.buffer = gst_buffer_make_writable (buffer);
3155 ret = gst_base_parse_push_frame (parse, &frame);
3156 gst_base_parse_frame_free (&frame);
3159 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3160 /* upstream feeding us in reverse playback;
3161 * finish previous fragment and start new upon DISCONT */
3162 if (parse->segment.rate < 0.0) {
3163 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3164 ret = gst_base_parse_finish_fragment (parse, TRUE);
3165 gst_base_parse_start_fragment (parse);
3167 /* discont in the stream, drain and mark discont for next output */
3168 gst_base_parse_drain (parse);
3169 parse->priv->discont = TRUE;
3172 gst_adapter_push (parse->priv->adapter, buffer);
3175 /* Parse and push as many frames as possible */
3176 /* Stop either when adapter is empty or we are flushing */
3177 while (!parse->priv->flushing) {
3179 gboolean updated_prev_pts = FALSE;
3181 /* note: if subclass indicates MAX fsize,
3182 * this will not likely be available anyway ... */
3183 min_size = MAX (parse->priv->min_frame_size, fsize);
3184 av = gst_adapter_available (parse->priv->adapter);
3186 if (G_UNLIKELY (parse->priv->drain)) {
3187 GST_DEBUG_OBJECT (parse, "draining, data left: %u, min %u", av, min_size);
3188 /* pass all available data to subclass, not just the minimum,
3189 * but never pass less than the minimum required to the subclass */
3190 if (av >= min_size) {
3192 if (G_UNLIKELY (!min_size))
3194 } else if (av > 0) {
3195 GST_DEBUG_OBJECT (parse, "draining, but not enough data available, "
3196 "discarding %u bytes", av);
3197 gst_adapter_clear (parse->priv->adapter);
3202 /* Collect at least min_frame_size bytes */
3203 if (av < min_size) {
3204 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3208 /* move along with upstream timestamp (if any),
3209 * but interpolate in between */
3210 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3211 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3212 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts)) {
3213 parse->priv->prev_pts = parse->priv->next_pts = pts;
3214 updated_prev_pts = TRUE;
3217 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
3218 parse->priv->prev_dts = parse->priv->next_dts = dts;
3219 parse->priv->prev_dts_from_pts = FALSE;
3222 /* we can mess with, erm interpolate, timestamps,
3223 * and incoming stuff has PTS but no DTS seen so far,
3224 * then pick up DTS from PTS and hope for the best ... */
3225 if (parse->priv->infer_ts &&
3226 parse->priv->pts_interpolate &&
3227 !GST_CLOCK_TIME_IS_VALID (dts) &&
3228 (!GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts)
3229 || (parse->priv->prev_dts_from_pts && updated_prev_pts))
3230 && GST_CLOCK_TIME_IS_VALID (pts)) {
3231 parse->priv->prev_dts = parse->priv->next_dts = pts;
3232 parse->priv->prev_dts_from_pts = TRUE;
3235 /* always pass all available data */
3236 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3238 /* already inform subclass what timestamps we have planned,
3239 * at least if provided by time-based upstream */
3240 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3241 tmpbuf = gst_buffer_make_writable (tmpbuf);
3242 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3243 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3244 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3247 /* keep the adapter mapped, so keep track of what has to be flushed */
3248 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3251 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3254 if (skip == 0 && flush == 0) {
3255 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3256 "breaking to get more data");
3257 /* ignore this return as it produced no data */
3265 GST_LOG_OBJECT (parse, "chain leaving");
3269 /* pull @size bytes at current offset,
3270 * i.e. at least try to and possibly return a shorter buffer if near the end */
3271 static GstFlowReturn
3272 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3273 GstBuffer ** buffer)
3275 GstFlowReturn ret = GST_FLOW_OK;
3277 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3279 /* Caching here actually makes much less difference than one would expect.
3280 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3281 if (parse->priv->cache) {
3282 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3283 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3285 if (cache_offset <= parse->priv->offset &&
3286 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3287 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3288 parse->priv->offset - cache_offset, size);
3289 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3292 /* not enough data in the cache, free cache and get a new one */
3293 gst_buffer_unref (parse->priv->cache);
3294 parse->priv->cache = NULL;
3297 /* refill the cache */
3299 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3300 64 * 1024), &parse->priv->cache);
3301 if (ret != GST_FLOW_OK) {
3302 parse->priv->cache = NULL;
3306 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3308 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3310 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3314 /* Not possible to get enough data, try a last time with
3315 * requesting exactly the size we need */
3316 gst_buffer_unref (parse->priv->cache);
3317 parse->priv->cache = NULL;
3319 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3320 &parse->priv->cache);
3322 if (ret != GST_FLOW_OK) {
3323 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3328 if (gst_buffer_get_size (parse->priv->cache) < size) {
3329 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3330 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3331 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3333 *buffer = parse->priv->cache;
3334 parse->priv->cache = NULL;
3340 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3341 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3346 static GstFlowReturn
3347 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3350 GstClockTime ts = 0;
3354 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3355 ", last_offset = %" G_GINT64_FORMAT,
3356 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3358 if (!parse->priv->last_offset
3359 || parse->priv->last_pts <= parse->segment.start) {
3360 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3361 GST_TIME_ARGS (parse->segment.start));
3366 /* last fragment started at last_offset / last_ts;
3367 * seek back 10s capped at 1MB */
3368 if (parse->priv->last_pts >= 10 * GST_SECOND)
3369 ts = parse->priv->last_pts - 10 * GST_SECOND;
3370 /* if we are exact now, we will be more so going backwards */
3371 if (parse->priv->exact_position) {
3372 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3374 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3375 GST_FORMAT_BYTES, &offset)) {
3376 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3379 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3380 parse->priv->last_offset - 1024);
3381 offset = MAX (0, offset);
3383 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3385 parse->priv->offset = offset;
3387 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3389 if (ret != GST_FLOW_OK)
3392 /* offset will increase again as fragment is processed/parsed */
3393 parse->priv->last_offset = offset;
3395 gst_base_parse_start_fragment (parse);
3396 gst_adapter_push (parse->priv->adapter, buffer);
3397 ret = gst_base_parse_finish_fragment (parse, TRUE);
3398 if (ret != GST_FLOW_OK)
3401 /* force previous fragment */
3402 parse->priv->offset = -1;
3409 * pull and scan for next frame starting from current offset
3410 * ajusts sync, drain and offset going along */
3411 static GstFlowReturn
3412 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3415 GstFlowReturn ret = GST_FLOW_OK;
3416 guint fsize, min_size;
3420 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3421 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3423 /* let's make this efficient for all subclass once and for all;
3424 * maybe it does not need this much, but in the latter case, we know we are
3425 * in pull mode here and might as well try to read and supply more anyway
3426 * (so does the buffer caching mechanism) */
3430 min_size = MAX (parse->priv->min_frame_size, fsize);
3432 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3434 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3435 if (ret != GST_FLOW_OK)
3438 /* if we got a short read, inform subclass we are draining leftover
3439 * and no more is to be expected */
3440 if (gst_buffer_get_size (buffer) < min_size) {
3441 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3442 parse->priv->drain = TRUE;
3445 if (parse->priv->detecting) {
3446 ret = klass->detect (parse, buffer);
3447 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3448 /* If draining we error out, otherwise request a buffer
3450 if (parse->priv->drain) {
3451 gst_buffer_unref (buffer);
3452 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3453 return GST_FLOW_ERROR;
3456 gst_buffer_unref (buffer);
3459 } else if (ret != GST_FLOW_OK) {
3460 gst_buffer_unref (buffer);
3461 GST_ERROR_OBJECT (parse, "detect() returned %s",
3462 gst_flow_get_name (ret));
3466 /* Else handle this buffer normally */
3469 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3470 if (ret != GST_FLOW_OK)
3473 /* If a large amount of data was requested to be skipped, _handle_buffer
3474 might have set the priv->skip flag to an extra amount on top of skip.
3475 In pull mode, we can just pull from the new offset directly. */
3476 parse->priv->offset += parse->priv->skip;
3477 parse->priv->skip = 0;
3479 /* something flushed means something happened,
3480 * and we should bail out of this loop so as not to occupy
3481 * the task thread indefinitely */
3483 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3486 /* nothing flushed, no skip and draining, so nothing left to do */
3487 if (!skip && parse->priv->drain) {
3488 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3489 "breaking loop and marking EOS");
3493 /* otherwise, get some more data
3494 * note that is checked this does not happen indefinitely */
3496 GST_LOG_OBJECT (parse, "getting some more data");
3499 parse->priv->drain = FALSE;
3506 /* Loop that is used in pull mode to retrieve data from upstream */
3508 gst_base_parse_loop (GstPad * pad)
3510 GstBaseParse *parse;
3511 GstBaseParseClass *klass;
3512 GstFlowReturn ret = GST_FLOW_OK;
3514 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3515 klass = GST_BASE_PARSE_GET_CLASS (parse);
3517 GST_LOG_OBJECT (parse, "Entering parse loop");
3519 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3524 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3527 event = gst_event_new_stream_start (stream_id);
3528 gst_event_set_group_id (event, gst_util_group_id_next ());
3530 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3531 gst_pad_push_event (parse->srcpad, event);
3532 parse->priv->push_stream_start = FALSE;
3536 /* reverse playback:
3537 * first fragment (closest to stop time) is handled normally below,
3538 * then we pull in fragments going backwards */
3539 if (parse->segment.rate < 0.0) {
3540 /* check if we jumped back to a previous fragment,
3541 * which is a post-first fragment */
3542 if (parse->priv->offset < 0) {
3543 ret = gst_base_parse_handle_previous_fragment (parse);
3548 ret = gst_base_parse_scan_frame (parse, klass);
3550 /* eat expected eos signalling past segment in reverse playback */
3551 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3552 parse->segment.position >= parse->segment.stop) {
3553 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3554 /* push what was accumulated during loop run */
3555 gst_base_parse_finish_fragment (parse, FALSE);
3556 /* force previous fragment */
3557 parse->priv->offset = -1;
3561 if (ret != GST_FLOW_OK)
3565 if (ret == GST_FLOW_EOS)
3567 else if (ret != GST_FLOW_OK)
3570 gst_object_unref (parse);
3577 GST_DEBUG_OBJECT (parse, "eos");
3582 gboolean push_eos = FALSE;
3584 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3585 gst_flow_get_name (ret));
3586 gst_pad_pause_task (parse->sinkpad);
3588 if (ret == GST_FLOW_EOS) {
3589 /* handle end-of-stream/segment */
3590 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3593 if ((stop = parse->segment.stop) == -1)
3594 stop = parse->segment.duration;
3596 GST_DEBUG_OBJECT (parse, "sending segment_done");
3598 gst_element_post_message
3599 (GST_ELEMENT_CAST (parse),
3600 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3601 GST_FORMAT_TIME, stop));
3602 gst_pad_push_event (parse->srcpad,
3603 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3605 /* If we STILL have zero frames processed, fire an error */
3606 if (parse->priv->framecount == 0) {
3607 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3608 ("No valid frames found before end of stream"), (NULL));
3612 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3613 /* for fatal errors we post an error message, wrong-state is
3614 * not fatal because it happens due to flushes and only means
3615 * that we should stop now. */
3616 GST_ELEMENT_FLOW_ERROR (parse, ret);
3620 if (parse->priv->estimated_duration <= 0) {
3621 gst_base_parse_update_duration (parse);
3623 /* Push pending events, including SEGMENT events */
3624 gst_base_parse_push_pending_events (parse);
3626 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3628 gst_object_unref (parse);
3633 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3635 GstSchedulingFlags sched_flags;
3636 GstBaseParse *parse;
3640 parse = GST_BASE_PARSE (parent);
3642 GST_DEBUG_OBJECT (parse, "sink activate");
3644 query = gst_query_new_scheduling ();
3645 if (!gst_pad_peer_query (sinkpad, query)) {
3646 gst_query_unref (query);
3647 goto baseparse_push;
3650 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3652 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3653 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3655 gst_query_unref (query);
3658 goto baseparse_push;
3660 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3661 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3662 goto baseparse_push;
3664 parse->priv->push_stream_start = TRUE;
3666 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3671 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3672 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3677 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3679 GstBaseParseClass *klass;
3680 gboolean result = TRUE;
3682 GST_DEBUG_OBJECT (parse, "activate %d", active);
3684 klass = GST_BASE_PARSE_GET_CLASS (parse);
3687 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3688 result = klass->start (parse);
3690 /* If the subclass implements ::detect we want to
3691 * call it for the first buffers now */
3692 parse->priv->detecting = (klass->detect != NULL);
3694 /* We must make sure streaming has finished before resetting things
3695 * and calling the ::stop vfunc */
3696 GST_PAD_STREAM_LOCK (parse->sinkpad);
3697 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3699 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3700 result = klass->stop (parse);
3702 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3704 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3709 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3710 GstPadMode mode, gboolean active)
3713 GstBaseParse *parse;
3715 parse = GST_BASE_PARSE (parent);
3717 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3718 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3720 if (!gst_base_parse_activate (parse, active))
3721 goto activate_failed;
3724 case GST_PAD_MODE_PULL:
3726 parse->priv->pending_events =
3727 g_list_prepend (parse->priv->pending_events,
3728 gst_event_new_segment (&parse->segment));
3731 result = gst_pad_stop_task (pad);
3739 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3741 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3748 GST_DEBUG_OBJECT (parse, "activate failed");
3754 * gst_base_parse_set_duration:
3755 * @parse: #GstBaseParse.
3757 * @duration: duration value.
3758 * @interval: how often to update the duration estimate based on bitrate, or 0.
3760 * Sets the duration of the currently playing media. Subclass can use this
3761 * when it is able to determine duration and/or notices a change in the media
3762 * duration. Alternatively, if @interval is non-zero (default), then stream
3763 * duration is determined based on estimated bitrate, and updated every @interval
3767 gst_base_parse_set_duration (GstBaseParse * parse,
3768 GstFormat fmt, gint64 duration, gint interval)
3770 g_return_if_fail (parse != NULL);
3772 if (parse->priv->upstream_has_duration) {
3773 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3777 if (duration != parse->priv->duration) {
3780 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3781 gst_element_post_message (GST_ELEMENT (parse), m);
3783 /* TODO: what about duration tag? */
3785 parse->priv->duration = duration;
3786 parse->priv->duration_fmt = fmt;
3787 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3788 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3789 if (interval != 0) {
3790 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3794 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3795 parse->priv->update_interval = interval;
3801 * gst_base_parse_set_average_bitrate:
3802 * @parse: #GstBaseParse.
3803 * @bitrate: average bitrate in bits/second
3805 * Optionally sets the average bitrate detected in media (if non-zero),
3806 * e.g. based on metadata, as it will be posted to the application.
3808 * By default, announced average bitrate is estimated. The average bitrate
3809 * is used to estimate the total duration of the stream and to estimate
3810 * a seek position, if there's no index and the format is syncable
3811 * (see gst_base_parse_set_syncable()).
3814 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3816 parse->priv->bitrate = bitrate;
3817 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3821 * gst_base_parse_set_min_frame_size:
3822 * @parse: #GstBaseParse.
3823 * @min_size: Minimum size of the data that this base class should give to
3826 * Subclass can use this function to tell the base class that it needs to
3827 * give at least #min_size buffers.
3830 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3832 g_return_if_fail (parse != NULL);
3834 parse->priv->min_frame_size = min_size;
3835 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3839 * gst_base_parse_set_frame_rate:
3840 * @parse: the #GstBaseParse to set
3841 * @fps_num: frames per second (numerator).
3842 * @fps_den: frames per second (denominator).
3843 * @lead_in: frames needed before a segment for subsequent decode
3844 * @lead_out: frames needed after a segment
3846 * If frames per second is configured, parser can take care of buffer duration
3847 * and timestamping. When performing segment clipping, or seeking to a specific
3848 * location, a corresponding decoder might need an initial @lead_in and a
3849 * following @lead_out number of frames to ensure the desired segment is
3850 * entirely filled upon decoding.
3853 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3854 guint fps_den, guint lead_in, guint lead_out)
3856 g_return_if_fail (parse != NULL);
3858 parse->priv->fps_num = fps_num;
3859 parse->priv->fps_den = fps_den;
3860 if (!fps_num || !fps_den) {
3861 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3863 fps_num = fps_den = 0;
3864 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3865 parse->priv->lead_in = parse->priv->lead_out = 0;
3866 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3868 parse->priv->frame_duration =
3869 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3870 parse->priv->lead_in = lead_in;
3871 parse->priv->lead_out = lead_out;
3872 parse->priv->lead_in_ts =
3873 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3874 parse->priv->lead_out_ts =
3875 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3876 /* aim for about 1.5s to estimate duration */
3877 if (parse->priv->update_interval < 0) {
3878 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3879 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3880 parse->priv->update_interval);
3883 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3884 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3885 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3886 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3887 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3888 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3892 * gst_base_parse_set_has_timing_info:
3893 * @parse: a #GstBaseParse
3894 * @has_timing: whether frames carry timing information
3896 * Set if frames carry timing information which the subclass can (generally)
3897 * parse and provide. In particular, intrinsic (rather than estimated) time
3898 * can be obtained following a seek.
3901 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3903 parse->priv->has_timing_info = has_timing;
3904 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3908 * gst_base_parse_set_syncable:
3909 * @parse: a #GstBaseParse
3910 * @syncable: set if frame starts can be identified
3912 * Set if frame starts can be identified. This is set by default and
3913 * determines whether seeking based on bitrate averages
3914 * is possible for a format/stream.
3917 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3919 parse->priv->syncable = syncable;
3920 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3924 * gst_base_parse_set_passthrough:
3925 * @parse: a #GstBaseParse
3926 * @passthrough: %TRUE if parser should run in passthrough mode
3928 * Set if the nature of the format or configuration does not allow (much)
3929 * parsing, and the parser should operate in passthrough mode (which only
3930 * applies when operating in push mode). That is, incoming buffers are
3931 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3932 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3933 * so subclass can perform as much or as little is appropriate for
3934 * passthrough semantics in @pre_push_frame.
3937 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3939 parse->priv->passthrough = passthrough;
3940 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3944 * gst_base_parse_set_pts_interpolation:
3945 * @parse: a #GstBaseParse
3946 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3948 * By default, the base class will guess PTS timestamps using a simple
3949 * interpolation (previous timestamp + duration), which is incorrect for
3950 * data streams with reordering, where PTS can go backward. Sub-classes
3951 * implementing such formats should disable PTS interpolation.
3954 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3955 gboolean pts_interpolate)
3957 parse->priv->pts_interpolate = pts_interpolate;
3958 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3959 (pts_interpolate) ? "yes" : "no");
3963 * gst_base_parse_set_infer_ts:
3964 * @parse: a #GstBaseParse
3965 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3967 * By default, the base class might try to infer PTS from DTS and vice
3968 * versa. While this is generally correct for audio data, it may not
3969 * be otherwise. Sub-classes implementing such formats should disable
3970 * timestamp inferring.
3973 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3975 parse->priv->infer_ts = infer_ts;
3976 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3980 * gst_base_parse_set_latency:
3981 * @parse: a #GstBaseParse
3982 * @min_latency: minimum parse latency
3983 * @max_latency: maximum parse latency
3985 * Sets the minimum and maximum (which may likely be equal) latency introduced
3986 * by the parsing process. If there is such a latency, which depends on the
3987 * particular parsing of the format, it typically corresponds to 1 frame duration.
3990 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3991 GstClockTime max_latency)
3993 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3994 g_return_if_fail (min_latency <= max_latency);
3996 GST_OBJECT_LOCK (parse);
3997 parse->priv->min_latency = min_latency;
3998 parse->priv->max_latency = max_latency;
3999 GST_OBJECT_UNLOCK (parse);
4000 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
4001 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
4002 GST_TIME_ARGS (max_latency));
4006 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
4007 GstClockTime * duration)
4009 gboolean res = FALSE;
4011 g_return_val_if_fail (duration != NULL, FALSE);
4013 *duration = GST_CLOCK_TIME_NONE;
4014 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
4015 GST_LOG_OBJECT (parse, "using provided duration");
4016 *duration = parse->priv->duration;
4018 } else if (parse->priv->duration != -1) {
4019 GST_LOG_OBJECT (parse, "converting provided duration");
4020 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
4021 parse->priv->duration, format, (gint64 *) duration);
4022 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
4023 GST_LOG_OBJECT (parse, "using estimated duration");
4024 *duration = parse->priv->estimated_duration;
4027 GST_LOG_OBJECT (parse, "cannot estimate duration");
4030 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
4031 GST_TIME_ARGS (*duration));
4036 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
4038 gboolean res = FALSE;
4041 pad = GST_BASE_PARSE_SRC_PAD (parse);
4043 switch (GST_QUERY_TYPE (query)) {
4044 case GST_QUERY_POSITION:
4049 GST_DEBUG_OBJECT (parse, "position query");
4050 gst_query_parse_position (query, &format, NULL);
4052 /* try upstream first */
4053 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4055 /* Fall back on interpreting segment */
4056 GST_OBJECT_LOCK (parse);
4057 if (format == GST_FORMAT_BYTES) {
4058 dest_value = parse->priv->offset;
4060 } else if (format == parse->segment.format &&
4061 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
4062 dest_value = gst_segment_to_stream_time (&parse->segment,
4063 parse->segment.format, parse->segment.position);
4066 GST_OBJECT_UNLOCK (parse);
4068 /* no precise result, upstream no idea either, then best estimate */
4069 /* priv->offset is updated in both PUSH/PULL modes */
4070 res = gst_base_parse_convert (parse,
4071 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
4074 gst_query_set_position (query, format, dest_value);
4078 case GST_QUERY_DURATION:
4081 GstClockTime duration;
4083 GST_DEBUG_OBJECT (parse, "duration query");
4084 gst_query_parse_duration (query, &format, NULL);
4086 /* consult upstream */
4087 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4089 /* otherwise best estimate from us */
4091 res = gst_base_parse_get_duration (parse, format, &duration);
4093 gst_query_set_duration (query, format, duration);
4097 case GST_QUERY_SEEKING:
4100 GstClockTime duration = GST_CLOCK_TIME_NONE;
4101 gboolean seekable = FALSE;
4103 GST_DEBUG_OBJECT (parse, "seeking query");
4104 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4106 /* consult upstream */
4107 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4109 /* we may be able to help if in TIME */
4110 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4111 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4112 /* already OK if upstream takes care */
4113 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4115 if (!(res && seekable)) {
4116 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4117 || duration == -1) {
4118 /* seekable if we still have a chance to get duration later on */
4120 parse->priv->upstream_seekable && parse->priv->update_interval;
4122 seekable = parse->priv->upstream_seekable;
4123 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4126 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4132 case GST_QUERY_FORMATS:
4133 gst_query_set_formatsv (query, 3, fmtlist);
4136 case GST_QUERY_CONVERT:
4138 GstFormat src_format, dest_format;
4139 gint64 src_value, dest_value;
4141 gst_query_parse_convert (query, &src_format, &src_value,
4142 &dest_format, &dest_value);
4144 res = gst_base_parse_convert (parse, src_format, src_value,
4145 dest_format, &dest_value);
4147 gst_query_set_convert (query, src_format, src_value,
4148 dest_format, dest_value);
4152 case GST_QUERY_LATENCY:
4154 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4156 GstClockTime min_latency, max_latency;
4158 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4159 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4160 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4161 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4163 GST_OBJECT_LOCK (parse);
4164 /* add our latency */
4165 min_latency += parse->priv->min_latency;
4166 if (max_latency == -1 || parse->priv->max_latency == -1)
4169 max_latency += parse->priv->max_latency;
4170 GST_OBJECT_UNLOCK (parse);
4172 gst_query_set_latency (query, live, min_latency, max_latency);
4176 case GST_QUERY_SEGMENT:
4181 format = parse->segment.format;
4184 gst_segment_to_stream_time (&parse->segment, format,
4185 parse->segment.start);
4186 if ((stop = parse->segment.stop) == -1)
4187 stop = parse->segment.duration;
4189 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4191 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4196 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4202 /* scans for a cluster start from @pos,
4203 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4204 static GstFlowReturn
4205 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4206 GstClockTime * time, GstClockTime * duration)
4208 GstBaseParseClass *klass;
4210 gboolean orig_drain, orig_discont;
4211 GstFlowReturn ret = GST_FLOW_OK;
4212 GstBuffer *buf = NULL;
4213 GstBaseParseFrame *sframe = NULL;
4215 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4216 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4217 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4219 klass = GST_BASE_PARSE_GET_CLASS (parse);
4221 *time = GST_CLOCK_TIME_NONE;
4222 *duration = GST_CLOCK_TIME_NONE;
4225 orig_offset = parse->priv->offset;
4226 orig_discont = parse->priv->discont;
4227 orig_drain = parse->priv->drain;
4229 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4230 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4232 /* jump elsewhere and locate next frame */
4233 parse->priv->offset = *pos;
4234 /* mark as scanning so frames don't get processed all the way */
4235 parse->priv->scanning = TRUE;
4236 ret = gst_base_parse_scan_frame (parse, klass);
4237 parse->priv->scanning = FALSE;
4238 /* retrieve frame found during scan */
4239 sframe = parse->priv->scanned_frame;
4240 parse->priv->scanned_frame = NULL;
4242 if (ret != GST_FLOW_OK || !sframe)
4245 /* get offset first, subclass parsing might dump other stuff in there */
4246 *pos = sframe->offset;
4247 buf = sframe->buffer;
4250 /* but it should provide proper time */
4251 *time = GST_BUFFER_TIMESTAMP (buf);
4252 *duration = GST_BUFFER_DURATION (buf);
4254 GST_LOG_OBJECT (parse,
4255 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4256 GST_TIME_ARGS (*time), *pos);
4260 gst_base_parse_frame_free (sframe);
4263 parse->priv->offset = orig_offset;
4264 parse->priv->discont = orig_discont;
4265 parse->priv->drain = orig_drain;
4270 /* bisect and scan through file for frame starting before @time,
4271 * returns OK and @time/@offset if found, NONE and/or error otherwise
4272 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4273 static GstFlowReturn
4274 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4277 GstFlowReturn ret = GST_FLOW_OK;
4278 gint64 lpos, hpos, newpos;
4279 GstClockTime time, ltime, htime, newtime, dur;
4280 gboolean cont = TRUE;
4281 const GstClockTime tolerance = TARGET_DIFFERENCE;
4282 const guint chunk = 4 * 1024;
4284 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4285 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4287 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4288 GST_TIME_ARGS (*_time));
4290 /* TODO also make keyframe aware if useful some day */
4305 /* do not know at first */
4307 *_time = GST_CLOCK_TIME_NONE;
4309 /* need initial positions; start and end */
4310 lpos = parse->priv->first_frame_offset;
4311 ltime = parse->priv->first_frame_pts;
4312 /* try other one if no luck */
4313 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4314 ltime = parse->priv->first_frame_dts;
4315 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4316 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4317 return GST_FLOW_ERROR;
4319 hpos = parse->priv->upstream_size;
4321 GST_DEBUG_OBJECT (parse,
4322 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4323 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4324 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4326 /* check preconditions are satisfied;
4327 * start and end are needed, except for special case where we scan for
4328 * last frame to determine duration */
4329 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4330 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4331 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4335 /* shortcut cases */
4338 } else if (time < ltime + tolerance) {
4342 } else if (time >= htime) {
4348 while (htime > ltime && cont) {
4349 GST_LOG_OBJECT (parse,
4350 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4351 GST_TIME_ARGS (ltime));
4352 GST_LOG_OBJECT (parse,
4353 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4354 GST_TIME_ARGS (htime));
4355 if (G_UNLIKELY (time == G_MAXINT64)) {
4357 } else if (G_LIKELY (hpos > lpos)) {
4359 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4362 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4364 /* we check this case once, but not forever, so break loop */
4369 newpos = CLAMP (newpos, lpos, hpos);
4370 GST_LOG_OBJECT (parse,
4371 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4372 GST_TIME_ARGS (time), newpos);
4374 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4375 if (ret == GST_FLOW_EOS) {
4376 /* heuristic HACK */
4377 hpos = MAX (lpos, hpos - chunk);
4379 } else if (ret != GST_FLOW_OK) {
4383 if (newtime == -1 || newpos == -1) {
4384 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4388 if (G_UNLIKELY (time == G_MAXINT64)) {
4391 if (GST_CLOCK_TIME_IS_VALID (dur))
4394 } else if (newtime > time) {
4396 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4398 } else if (newtime + tolerance > time) {
4399 /* close enough undershoot */
4403 } else if (newtime < ltime) {
4404 /* so a position beyond lpos resulted in earlier time than ltime ... */
4405 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4408 /* undershoot too far */
4409 newpos += newpos == lpos ? chunk : 0;
4410 lpos = CLAMP (newpos, lpos, hpos);
4416 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4417 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4422 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4423 gboolean before, GstClockTime * _ts)
4425 gint64 bytes = 0, ts = 0;
4426 GstIndexEntry *entry = NULL;
4428 if (time == GST_CLOCK_TIME_NONE) {
4434 GST_BASE_PARSE_INDEX_LOCK (parse);
4435 if (parse->priv->index) {
4436 /* Let's check if we have an index entry for that time */
4437 entry = gst_index_get_assoc_entry (parse->priv->index,
4438 parse->priv->index_id,
4439 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4440 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4444 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4445 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4447 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4448 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4449 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4451 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4452 GST_TIME_ARGS (time));
4455 ts = GST_CLOCK_TIME_NONE;
4458 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4467 /* returns TRUE if seek succeeded */
4469 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4474 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4475 gboolean flush, update, res = TRUE, accurate;
4476 gint64 start, stop, seekpos, seekstop;
4477 GstSegment seeksegment = { 0, };
4478 GstClockTime start_ts;
4480 GstEvent *segment_event;
4482 /* try upstream first, unless we're driving the streaming thread ourselves */
4483 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4484 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4489 gst_event_parse_seek (event, &rate, &format, &flags,
4490 &start_type, &start, &stop_type, &stop);
4491 seqnum = gst_event_get_seqnum (event);
4493 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4494 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4495 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4496 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4498 /* we can only handle TIME, so check if subclass can convert
4499 * to TIME format if it's some other format (such as DEFAULT) */
4500 if (format != GST_FORMAT_TIME) {
4501 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4502 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4504 goto no_convert_to_time;
4506 GST_INFO_OBJECT (parse, "converted %s format to start time "
4507 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4508 gst_format_get_name (format), GST_TIME_ARGS (start),
4509 GST_TIME_ARGS (stop));
4511 format = GST_FORMAT_TIME;
4514 /* no negative rates in push mode (unless upstream takes care of that, but
4515 * we've already tried upstream and it didn't handle the seek request) */
4516 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4519 if (start_type != GST_SEEK_TYPE_SET ||
4520 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4523 /* get flush flag */
4524 flush = flags & GST_SEEK_FLAG_FLUSH;
4526 /* copy segment, we need this because we still need the old
4527 * segment when we close the current segment. */
4528 gst_segment_copy_into (&parse->segment, &seeksegment);
4530 GST_DEBUG_OBJECT (parse, "configuring seek");
4531 gst_segment_do_seek (&seeksegment, rate, format, flags,
4532 start_type, start, stop_type, stop, &update);
4534 /* accurate seeking implies seek tables are used to obtain position,
4535 * and the requested segment is maintained exactly, not adjusted any way */
4536 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4538 /* maybe we can be accurate for (almost) free */
4539 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4540 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4541 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4546 GstClockTime startpos;
4548 startpos = seeksegment.position;
4552 /* accurate requested, so ... seek a bit before target */
4553 if (startpos < parse->priv->lead_in_ts)
4556 startpos -= parse->priv->lead_in_ts;
4558 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4559 seeksegment.stop = seeksegment.start + seeksegment.duration;
4561 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4562 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4566 start_ts = seeksegment.position;
4570 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4571 seeksegment.stop = seeksegment.start + seeksegment.duration;
4573 if (!gst_base_parse_convert (parse, format, start_ts,
4574 GST_FORMAT_BYTES, &seekpos))
4575 goto convert_failed;
4576 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4577 GST_FORMAT_BYTES, &seekstop))
4578 goto convert_failed;
4581 GST_DEBUG_OBJECT (parse,
4582 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4584 GST_DEBUG_OBJECT (parse,
4585 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4586 seeksegment.stop, seekstop);
4588 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4591 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4594 if (parse->srcpad) {
4595 GstEvent *fevent = gst_event_new_flush_start ();
4596 GST_DEBUG_OBJECT (parse, "sending flush start");
4598 gst_event_set_seqnum (fevent, seqnum);
4600 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4601 /* unlock upstream pull_range */
4602 gst_pad_push_event (parse->sinkpad, fevent);
4605 gst_pad_pause_task (parse->sinkpad);
4608 /* we should now be able to grab the streaming thread because we stopped it
4609 * with the above flush/pause code */
4610 GST_PAD_STREAM_LOCK (parse->sinkpad);
4612 /* save current position */
4613 last_stop = parse->segment.position;
4614 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4617 /* now commit to new position */
4619 /* prepare for streaming again */
4621 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4622 GST_DEBUG_OBJECT (parse, "sending flush stop");
4623 gst_event_set_seqnum (fevent, seqnum);
4624 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4625 gst_pad_push_event (parse->sinkpad, fevent);
4626 gst_base_parse_clear_queues (parse);
4628 /* keep track of our position */
4629 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4630 seeksegment.format, parse->segment.position);
4633 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4635 /* store the newsegment event so it can be sent from the streaming thread. */
4636 /* This will be sent later in _loop() */
4637 segment_event = gst_event_new_segment (&parse->segment);
4638 gst_event_set_seqnum (segment_event, seqnum);
4639 parse->priv->pending_events =
4640 g_list_prepend (parse->priv->pending_events, segment_event);
4642 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4643 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4644 ", time = %" GST_TIME_FORMAT, format,
4645 GST_TIME_ARGS (parse->segment.start),
4646 GST_TIME_ARGS (parse->segment.stop),
4647 GST_TIME_ARGS (parse->segment.time));
4649 /* one last chance in pull mode to stay accurate;
4650 * maybe scan and subclass can find where to go */
4653 GstClockTime ts = seeksegment.position;
4655 gst_base_parse_locate_time (parse, &ts, &scanpos);
4659 /* running collected index now consists of several intervals,
4660 * so optimized check no longer possible */
4661 parse->priv->index_last_valid = FALSE;
4662 parse->priv->index_last_offset = 0;
4663 parse->priv->index_last_ts = 0;
4667 /* mark discont if we are going to stream from another position. */
4668 if (seekpos != parse->priv->offset) {
4669 GST_DEBUG_OBJECT (parse,
4670 "mark DISCONT, we did a seek to another position");
4671 parse->priv->offset = seekpos;
4672 parse->priv->last_offset = seekpos;
4673 parse->priv->seen_keyframe = FALSE;
4674 parse->priv->discont = TRUE;
4675 parse->priv->next_dts = start_ts;
4676 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4677 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4678 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4679 parse->priv->sync_offset = seekpos;
4680 parse->priv->exact_position = accurate;
4683 /* Start streaming thread if paused */
4684 gst_pad_start_task (parse->sinkpad,
4685 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4687 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4692 GstEvent *new_event;
4693 GstBaseParseSeek *seek;
4694 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4696 /* The only thing we need to do in PUSH-mode is to send the
4697 seek event (in bytes) to upstream. Segment / flush handling happens
4698 in corresponding src event handlers */
4699 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4700 if (seekstop >= 0 && seekstop <= seekpos)
4702 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4703 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4704 gst_event_set_seqnum (new_event, seqnum);
4706 /* store segment info so its precise details can be reconstructed when
4707 * receiving newsegment;
4708 * this matters for all details when accurate seeking,
4709 * is most useful to preserve NONE stop time otherwise */
4710 seek = g_new0 (GstBaseParseSeek, 1);
4711 seek->segment = seeksegment;
4712 seek->accurate = accurate;
4713 seek->offset = seekpos;
4714 seek->start_ts = start_ts;
4715 GST_OBJECT_LOCK (parse);
4716 /* less optimal, but preserves order */
4717 parse->priv->pending_seeks =
4718 g_slist_append (parse->priv->pending_seeks, seek);
4719 GST_OBJECT_UNLOCK (parse);
4721 res = gst_pad_push_event (parse->sinkpad, new_event);
4724 GST_OBJECT_LOCK (parse);
4725 parse->priv->pending_seeks =
4726 g_slist_remove (parse->priv->pending_seeks, seek);
4727 GST_OBJECT_UNLOCK (parse);
4733 gst_event_unref (event);
4739 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4745 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4751 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4752 "couldn't convert that into TIME format", gst_format_get_name (format));
4758 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4765 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4767 if (taglist == parse->priv->upstream_tags)
4770 if (parse->priv->upstream_tags) {
4771 gst_tag_list_unref (parse->priv->upstream_tags);
4772 parse->priv->upstream_tags = NULL;
4775 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4777 if (taglist != NULL)
4778 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4780 gst_base_parse_check_bitrate_tags (parse);
4785 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4787 GstBaseParse *parse = GST_BASE_PARSE (element);
4789 GST_BASE_PARSE_INDEX_LOCK (parse);
4790 if (parse->priv->index)
4791 gst_object_unref (parse->priv->index);
4793 parse->priv->index = gst_object_ref (index);
4794 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4795 &parse->priv->index_id);
4796 parse->priv->own_index = FALSE;
4798 parse->priv->index = NULL;
4800 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4804 gst_base_parse_get_index (GstElement * element)
4806 GstBaseParse *parse = GST_BASE_PARSE (element);
4807 GstIndex *result = NULL;
4809 GST_BASE_PARSE_INDEX_LOCK (parse);
4810 if (parse->priv->index)
4811 result = gst_object_ref (parse->priv->index);
4812 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4818 static GstStateChangeReturn
4819 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4821 GstBaseParse *parse;
4822 GstStateChangeReturn result;
4824 parse = GST_BASE_PARSE (element);
4826 switch (transition) {
4827 case GST_STATE_CHANGE_READY_TO_PAUSED:
4828 /* If this is our own index destroy it as the
4829 * old entries might be wrong for the new stream */
4830 GST_BASE_PARSE_INDEX_LOCK (parse);
4831 if (parse->priv->own_index) {
4832 gst_object_unref (parse->priv->index);
4833 parse->priv->index = NULL;
4834 parse->priv->own_index = FALSE;
4837 /* If no index was created, generate one */
4838 if (G_UNLIKELY (!parse->priv->index)) {
4839 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4841 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4842 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4843 &parse->priv->index_id);
4844 parse->priv->own_index = TRUE;
4846 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4852 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4854 switch (transition) {
4855 case GST_STATE_CHANGE_PAUSED_TO_READY:
4856 gst_base_parse_reset (parse);
4866 * gst_base_parse_set_ts_at_offset:
4867 * @parse: a #GstBaseParse
4868 * @offset: offset into current buffer
4870 * This function should only be called from a @handle_frame implementation.
4872 * #GstBaseParse creates initial timestamps for frames by using the last
4873 * timestamp seen in the stream before the frame starts. In certain
4874 * cases, the correct timestamps will occur in the stream after the
4875 * start of the frame, but before the start of the actual picture data.
4876 * This function can be used to set the timestamps based on the offset
4877 * into the frame data that the picture starts.
4882 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4884 GstClockTime pts, dts;
4886 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4888 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4889 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4891 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4892 GST_DEBUG_OBJECT (parse,
4893 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4894 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4896 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4897 parse->priv->prev_pts = parse->priv->next_pts = pts;
4899 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
4900 parse->priv->prev_dts = parse->priv->next_dts = dts;
4901 parse->priv->prev_dts_from_pts = FALSE;
4906 * gst_base_parse_merge_tags:
4907 * @parse: a #GstBaseParse
4908 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4909 * previously-set tags
4910 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4912 * Sets the parser subclass's tags and how they should be merged with any
4913 * upstream stream tags. This will override any tags previously-set
4914 * with gst_base_parse_merge_tags().
4916 * Note that this is provided for convenience, and the subclass is
4917 * not required to use this and can still do tag handling on its own.
4922 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4923 GstTagMergeMode mode)
4925 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4926 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4927 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4929 GST_OBJECT_LOCK (parse);
4931 if (tags != parse->priv->parser_tags) {
4932 if (parse->priv->parser_tags) {
4933 gst_tag_list_unref (parse->priv->parser_tags);
4934 parse->priv->parser_tags = NULL;
4935 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4938 parse->priv->parser_tags = gst_tag_list_ref (tags);
4939 parse->priv->parser_tags_merge_mode = mode;
4942 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4943 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4945 gst_base_parse_check_bitrate_tags (parse);
4946 parse->priv->tags_changed = TRUE;
4949 GST_OBJECT_UNLOCK (parse);