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 /* only add bitrate tags to non-empty taglists for now, and only if neither
956 * upstream tags nor the subclass sets the bitrate tag in question already */
957 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
958 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
959 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MINIMUM_BITRATE,
960 parse->priv->min_bitrate, NULL);
962 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
963 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
964 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_MAXIMUM_BITRATE,
965 parse->priv->max_bitrate, NULL);
967 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
968 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
969 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
970 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP, GST_TAG_BITRATE,
971 parse->priv->avg_bitrate, NULL);
974 parse->priv->pending_events =
975 g_list_prepend (parse->priv->pending_events,
976 gst_event_new_tag (merged_tags));
979 /* gst_base_parse_parse_frame:
980 * @parse: #GstBaseParse.
981 * @buffer: #GstBuffer.
983 * Default callback for parse_frame.
986 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
988 GstBuffer *buffer = frame->buffer;
990 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
991 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
992 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
994 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
995 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
996 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
998 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
999 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
1000 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
1005 /* gst_base_parse_convert:
1006 * @parse: #GstBaseParse.
1007 * @src_format: #GstFormat describing the source format.
1008 * @src_value: Source value to be converted.
1009 * @dest_format: #GstFormat defining the converted format.
1010 * @dest_value: Pointer where the conversion result will be put.
1012 * Converts using configured "convert" vmethod in #GstBaseParse class.
1014 * Returns: %TRUE if conversion was successful.
1017 gst_base_parse_convert (GstBaseParse * parse,
1018 GstFormat src_format,
1019 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1021 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1024 g_return_val_if_fail (dest_value != NULL, FALSE);
1026 if (!klass->convert)
1029 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
1031 #ifndef GST_DISABLE_GST_DEBUG
1034 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
1035 GST_LOG_OBJECT (parse,
1036 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
1037 GST_TIME_ARGS (src_value), *dest_value);
1038 } else if (dest_format == GST_FORMAT_TIME &&
1039 src_format == GST_FORMAT_BYTES) {
1040 GST_LOG_OBJECT (parse,
1041 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
1042 src_value, GST_TIME_ARGS (*dest_value));
1044 GST_LOG_OBJECT (parse,
1045 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
1046 GST_STR_NULL (gst_format_get_name (src_format)),
1047 GST_STR_NULL (gst_format_get_name (dest_format)),
1048 src_value, *dest_value);
1051 GST_DEBUG_OBJECT (parse, "conversion failed");
1060 update_upstream_provided (GQuark field_id, const GValue * value,
1063 GstCaps *default_caps = user_data;
1067 caps_size = gst_caps_get_size (default_caps);
1068 for (i = 0; i < caps_size; i++) {
1069 GstStructure *structure = gst_caps_get_structure (default_caps, i);
1070 if (gst_structure_id_has_field (structure, field_id))
1071 gst_structure_id_set_value (structure, field_id, value);
1078 gst_base_parse_negotiate_default_caps (GstBaseParse * parse)
1080 GstCaps *caps, *templcaps;
1081 GstCaps *sinkcaps = NULL;
1082 GstCaps *default_caps = NULL;
1083 GstStructure *structure;
1085 templcaps = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SRC_PAD (parse));
1086 caps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), templcaps);
1088 gst_caps_unref (templcaps);
1093 if (!caps || gst_caps_is_empty (caps) || gst_caps_is_any (caps)) {
1097 GST_LOG_OBJECT (parse, "peer caps %" GST_PTR_FORMAT, caps);
1099 /* before fixating, try to use whatever upstream provided */
1100 default_caps = gst_caps_copy (caps);
1101 sinkcaps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
1103 GST_LOG_OBJECT (parse, "current caps %" GST_PTR_FORMAT " for sinkpad",
1107 structure = gst_caps_get_structure (sinkcaps, 0);
1108 gst_structure_foreach (structure, update_upstream_provided, default_caps);
1111 default_caps = gst_caps_fixate (default_caps);
1113 if (!default_caps) {
1114 GST_WARNING_OBJECT (parse, "Failed to create default caps !");
1118 GST_INFO_OBJECT (parse,
1119 "Chose default caps %" GST_PTR_FORMAT " for initial gap", default_caps);
1121 gst_caps_unref (sinkcaps);
1122 gst_caps_unref (caps);
1124 return default_caps;
1129 gst_caps_unref (caps);
1131 gst_caps_unref (sinkcaps);
1136 /* gst_base_parse_sink_event:
1137 * @pad: #GstPad that received the event.
1138 * @event: #GstEvent to be handled.
1140 * Handler for sink pad events.
1142 * Returns: %TRUE if the event was handled.
1145 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1147 GstBaseParse *parse = GST_BASE_PARSE (parent);
1148 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
1151 ret = bclass->sink_event (parse, event);
1156 /* gst_base_parse_sink_event_default:
1157 * @parse: #GstBaseParse.
1158 * @event: #GstEvent to be handled.
1160 * Element-level event handler function.
1162 * The event will be unreffed only if it has been handled and this
1163 * function returns %TRUE
1165 * Returns: %TRUE if the event was handled and not need forwarding.
1168 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
1170 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1171 gboolean ret = FALSE;
1172 gboolean forward_immediate = FALSE;
1174 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
1175 GST_EVENT_TYPE_NAME (event));
1177 switch (GST_EVENT_TYPE (event)) {
1178 case GST_EVENT_CAPS:
1182 gst_event_parse_caps (event, &caps);
1183 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1185 if (klass->set_sink_caps)
1186 ret = klass->set_sink_caps (parse, caps);
1190 /* will send our own caps downstream */
1191 gst_event_unref (event);
1195 case GST_EVENT_SEGMENT:
1197 const GstSegment *in_segment;
1198 GstSegment out_segment;
1199 gint64 offset = 0, next_dts;
1200 guint32 seqnum = gst_event_get_seqnum (event);
1202 gst_event_parse_segment (event, &in_segment);
1203 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1204 out_segment.rate = in_segment->rate;
1205 out_segment.applied_rate = in_segment->applied_rate;
1207 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1209 parse->priv->upstream_format = in_segment->format;
1210 if (in_segment->format == GST_FORMAT_BYTES) {
1211 GstBaseParseSeek *seek = NULL;
1214 /* stop time is allowed to be open-ended, but not start & pos */
1215 offset = in_segment->time;
1217 GST_OBJECT_LOCK (parse);
1218 for (node = parse->priv->pending_seeks; node; node = node->next) {
1219 GstBaseParseSeek *tmp = node->data;
1221 if (tmp->offset == offset) {
1226 parse->priv->pending_seeks =
1227 g_slist_remove (parse->priv->pending_seeks, seek);
1228 GST_OBJECT_UNLOCK (parse);
1231 GST_DEBUG_OBJECT (parse,
1232 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1233 seek->accurate ? " accurate" : "", &seek->segment);
1235 out_segment.start = seek->segment.start;
1236 out_segment.stop = seek->segment.stop;
1237 out_segment.time = seek->segment.start;
1239 next_dts = seek->start_ts;
1240 parse->priv->exact_position = seek->accurate;
1243 /* best attempt convert */
1244 /* as these are only estimates, stop is kept open-ended to avoid
1245 * premature cutting */
1246 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1247 GST_FORMAT_TIME, (gint64 *) & next_dts);
1249 out_segment.start = next_dts;
1250 out_segment.stop = GST_CLOCK_TIME_NONE;
1251 out_segment.time = next_dts;
1253 parse->priv->exact_position = (in_segment->start == 0);
1256 gst_event_unref (event);
1258 event = gst_event_new_segment (&out_segment);
1259 gst_event_set_seqnum (event, seqnum);
1261 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1262 GST_SEGMENT_FORMAT, in_segment);
1264 } else if (in_segment->format != GST_FORMAT_TIME) {
1265 /* Unknown incoming segment format. Output a default open-ended
1267 gst_event_unref (event);
1269 out_segment.start = 0;
1270 out_segment.stop = GST_CLOCK_TIME_NONE;
1271 out_segment.time = 0;
1273 event = gst_event_new_segment (&out_segment);
1274 gst_event_set_seqnum (event, seqnum);
1278 /* not considered BYTE seekable if it is talking to us in TIME,
1279 * whatever else it might claim */
1280 parse->priv->upstream_seekable = FALSE;
1281 next_dts = in_segment->start;
1282 gst_event_copy_segment (event, &out_segment);
1285 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1288 gst_segment_set_newsegment (&parse->segment, update, rate,
1289 applied_rate, format, start, stop, start);
1294 /* save the segment for later, right before we push a new buffer so that
1295 * the caps are fixed and the next linked element can receive
1296 * the segment but finish the current segment */
1297 GST_DEBUG_OBJECT (parse, "draining current segment");
1298 if (in_segment->rate > 0.0)
1299 gst_base_parse_drain (parse);
1301 gst_base_parse_finish_fragment (parse, FALSE);
1302 gst_adapter_clear (parse->priv->adapter);
1304 parse->priv->offset = offset;
1305 parse->priv->sync_offset = offset;
1306 parse->priv->next_dts = next_dts;
1307 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1308 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1309 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1310 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1311 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1312 parse->priv->prev_dts_from_pts = FALSE;
1313 parse->priv->discont = TRUE;
1314 parse->priv->seen_keyframe = FALSE;
1315 parse->priv->skip = 0;
1319 case GST_EVENT_SEGMENT_DONE:
1320 /* need to drain now, rather than upon a new segment,
1321 * since that would have SEGMENT_DONE come before potential
1322 * delayed last part of the current segment */
1323 GST_DEBUG_OBJECT (parse, "draining current segment");
1324 if (parse->segment.rate > 0.0)
1325 gst_base_parse_drain (parse);
1327 gst_base_parse_finish_fragment (parse, FALSE);
1328 /* Also forward event immediately, there might be no new data
1329 * coming afterwards that would allow us to forward it later */
1330 forward_immediate = TRUE;
1333 case GST_EVENT_FLUSH_START:
1334 GST_OBJECT_LOCK (parse);
1335 parse->priv->flushing = TRUE;
1336 GST_OBJECT_UNLOCK (parse);
1339 case GST_EVENT_FLUSH_STOP:
1340 gst_adapter_clear (parse->priv->adapter);
1341 gst_base_parse_clear_queues (parse);
1342 parse->priv->flushing = FALSE;
1343 parse->priv->discont = TRUE;
1344 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1345 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1346 parse->priv->new_frame = TRUE;
1347 parse->priv->skip = 0;
1349 forward_immediate = TRUE;
1353 if (parse->segment.rate > 0.0)
1354 gst_base_parse_drain (parse);
1356 gst_base_parse_finish_fragment (parse, TRUE);
1358 /* If we STILL have zero frames processed, fire an error */
1359 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps &&
1360 !parse->priv->first_buffer) {
1361 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1362 ("No valid frames found before end of stream"), (NULL));
1365 if (!parse->priv->saw_gaps
1366 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1367 /* We've not posted bitrate tags yet - do so now */
1368 gst_base_parse_queue_tag_event_update (parse);
1371 /* newsegment and other serialized events before eos */
1372 gst_base_parse_push_pending_events (parse);
1374 forward_immediate = TRUE;
1376 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1377 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1378 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1379 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1382 const GstStructure *s;
1383 gboolean ev_still_state;
1385 s = gst_event_get_structure (event);
1387 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1388 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1389 if (ev_still_state) {
1390 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1391 if (parse->segment.rate > 0.0)
1392 gst_base_parse_drain (parse);
1394 gst_base_parse_finish_fragment (parse, TRUE);
1396 forward_immediate = TRUE;
1402 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1404 /* Ensure we have caps before forwarding the event */
1405 if (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (parse))) {
1406 GstCaps *default_caps = NULL;
1407 if ((default_caps = gst_base_parse_negotiate_default_caps (parse))) {
1408 GST_DEBUG_OBJECT (parse,
1409 "Store caps event to pending list for initial pre-rolling");
1410 parse->priv->pending_events =
1411 g_list_prepend (parse->priv->pending_events,
1412 gst_event_new_caps (default_caps));
1413 gst_caps_unref (default_caps);
1415 gst_event_unref (event);
1418 GST_ELEMENT_ERROR (parse, STREAM, FORMAT, (NULL),
1419 ("Parser output not negotiated before GAP event."));
1424 gst_base_parse_push_pending_events (parse);
1426 if (parse->segment.rate > 0.0)
1427 gst_base_parse_drain (parse);
1429 gst_base_parse_finish_fragment (parse, TRUE);
1430 forward_immediate = TRUE;
1431 parse->priv->saw_gaps = TRUE;
1436 GstTagList *tags = NULL;
1438 gst_event_parse_tag (event, &tags);
1440 /* We only care about stream tags here, global tags we just forward */
1441 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1444 gst_base_parse_set_upstream_tags (parse, tags);
1445 gst_base_parse_queue_tag_event_update (parse);
1446 parse->priv->tags_changed = FALSE;
1447 gst_event_unref (event);
1452 case GST_EVENT_STREAM_START:
1454 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1455 forward_immediate = TRUE;
1457 gst_base_parse_set_upstream_tags (parse, NULL);
1458 parse->priv->tags_changed = TRUE;
1465 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1466 * For EOS this is required because no buffer or serialized event
1467 * will come after EOS and nothing could trigger another
1468 * _finish_frame() call. *
1469 * If the subclass handles sending of EOS manually it can return
1470 * _DROPPED from ::finish() and all other subclasses should have
1471 * decoded/flushed all remaining data before this
1473 * For FLUSH_STOP this is required because it is expected
1474 * to be forwarded immediately and no buffers are queued anyway.
1477 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1478 ret = gst_pad_push_event (parse->srcpad, event);
1480 parse->priv->pending_events =
1481 g_list_prepend (parse->priv->pending_events, event);
1486 GST_DEBUG_OBJECT (parse, "event handled");
1492 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1497 pad = GST_BASE_PARSE_SINK_PAD (parse);
1499 switch (GST_QUERY_TYPE (query)) {
1500 case GST_QUERY_CAPS:
1502 GstBaseParseClass *bclass;
1504 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1506 if (bclass->get_sink_caps) {
1507 GstCaps *caps, *filter;
1509 gst_query_parse_caps (query, &filter);
1510 caps = bclass->get_sink_caps (parse, filter);
1511 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1513 gst_query_set_caps_result (query, caps);
1514 gst_caps_unref (caps);
1518 GstCaps *caps, *template_caps, *filter;
1520 gst_query_parse_caps (query, &filter);
1521 template_caps = gst_pad_get_pad_template_caps (pad);
1522 if (filter != NULL) {
1524 gst_caps_intersect_full (filter, template_caps,
1525 GST_CAPS_INTERSECT_FIRST);
1526 gst_caps_unref (template_caps);
1528 caps = template_caps;
1530 gst_query_set_caps_result (query, caps);
1531 gst_caps_unref (caps);
1539 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1548 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1550 GstBaseParseClass *bclass;
1551 GstBaseParse *parse;
1554 parse = GST_BASE_PARSE (parent);
1555 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1557 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1559 if (bclass->sink_query)
1560 ret = bclass->sink_query (parse, query);
1564 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1565 GST_QUERY_TYPE_NAME (query), ret, query);
1571 gst_base_parse_src_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_PTR_FORMAT,
1581 GST_QUERY_TYPE_NAME (query), query);
1583 if (bclass->src_query)
1584 ret = bclass->src_query (parse, query);
1588 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1589 GST_QUERY_TYPE_NAME (query), ret, query);
1594 /* gst_base_parse_src_event:
1595 * @pad: #GstPad that received the event.
1596 * @event: #GstEvent that was received.
1598 * Handler for source pad events.
1600 * Returns: %TRUE if the event was handled.
1603 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1605 GstBaseParse *parse;
1606 GstBaseParseClass *bclass;
1607 gboolean ret = TRUE;
1609 parse = GST_BASE_PARSE (parent);
1610 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1612 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1613 GST_EVENT_TYPE_NAME (event));
1615 if (bclass->src_event)
1616 ret = bclass->src_event (parse, event);
1618 gst_event_unref (event);
1624 gst_base_parse_is_seekable (GstBaseParse * parse)
1626 /* FIXME: could do more here, e.g. check index or just send data from 0
1627 * in pull mode and let decoder/sink clip */
1628 return parse->priv->syncable;
1631 /* gst_base_parse_src_event_default:
1632 * @parse: #GstBaseParse.
1633 * @event: #GstEvent that was received.
1635 * Default srcpad event handler.
1637 * Returns: %TRUE if the event was handled and can be dropped.
1640 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1642 gboolean res = FALSE;
1644 switch (GST_EVENT_TYPE (event)) {
1645 case GST_EVENT_SEEK:
1646 if (gst_base_parse_is_seekable (parse))
1647 res = gst_base_parse_handle_seek (parse, event);
1650 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1659 * gst_base_parse_convert_default:
1660 * @parse: #GstBaseParse.
1661 * @src_format: #GstFormat describing the source format.
1662 * @src_value: Source value to be converted.
1663 * @dest_format: #GstFormat defining the converted format.
1664 * @dest_value: Pointer where the conversion result will be put.
1666 * Default implementation of "convert" vmethod in #GstBaseParse class.
1668 * Returns: %TRUE if conversion was successful.
1671 gst_base_parse_convert_default (GstBaseParse * parse,
1672 GstFormat src_format,
1673 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1675 gboolean ret = FALSE;
1676 guint64 bytes, duration;
1678 if (G_UNLIKELY (src_format == dest_format)) {
1679 *dest_value = src_value;
1683 if (G_UNLIKELY (src_value == -1)) {
1688 if (G_UNLIKELY (src_value == 0)) {
1693 /* need at least some frames */
1694 if (!parse->priv->framecount)
1697 duration = parse->priv->acc_duration / GST_MSECOND;
1698 bytes = parse->priv->bytecount;
1700 if (G_UNLIKELY (!duration || !bytes))
1701 goto no_duration_bytes;
1703 if (src_format == GST_FORMAT_BYTES) {
1704 if (dest_format == GST_FORMAT_TIME) {
1705 /* BYTES -> TIME conversion */
1706 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1707 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1708 *dest_value *= GST_MSECOND;
1709 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1710 *dest_value / GST_MSECOND);
1713 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1715 } else if (src_format == GST_FORMAT_TIME) {
1716 if (dest_format == GST_FORMAT_BYTES) {
1717 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1718 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1720 GST_DEBUG_OBJECT (parse,
1721 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1722 src_value / GST_MSECOND, *dest_value);
1725 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1727 } else if (src_format == GST_FORMAT_DEFAULT) {
1728 /* DEFAULT == frame-based */
1729 if (dest_format == GST_FORMAT_TIME) {
1730 GST_DEBUG_OBJECT (parse, "converting default -> time");
1731 if (parse->priv->fps_den) {
1732 *dest_value = gst_util_uint64_scale (src_value,
1733 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1737 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1740 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1747 GST_DEBUG_OBJECT (parse, "no framecount");
1752 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1753 G_GUINT64_FORMAT, duration, bytes);
1760 gst_base_parse_update_duration (GstBaseParse * parse)
1762 gint64 ptot, dest_value;
1764 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1767 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1768 GST_FORMAT_TIME, &dest_value))
1771 /* inform if duration changed, but try to avoid spamming */
1772 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1774 parse->priv->estimated_duration = dest_value;
1775 GST_LOG_OBJECT (parse,
1776 "updated estimated duration to %" GST_TIME_FORMAT,
1777 GST_TIME_ARGS (dest_value));
1779 if (parse->priv->estimated_drift > GST_SECOND ||
1780 parse->priv->estimated_drift < -GST_SECOND) {
1781 gst_element_post_message (GST_ELEMENT (parse),
1782 gst_message_new_duration_changed (GST_OBJECT (parse)));
1783 parse->priv->estimated_drift = 0;
1787 /* gst_base_parse_update_bitrates:
1788 * @parse: #GstBaseParse.
1789 * @buffer: Current frame as a #GstBuffer
1791 * Keeps track of the minimum and maximum bitrates, and also maintains a
1792 * running average bitrate of the stream so far.
1795 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1797 guint64 data_len, frame_dur;
1798 gint overhead, frame_bitrate;
1799 GstBuffer *buffer = frame->buffer;
1801 overhead = frame->overhead;
1805 data_len = gst_buffer_get_size (buffer) - overhead;
1806 parse->priv->data_bytecount += data_len;
1808 /* duration should be valid by now,
1809 * either set by subclass or maybe based on fps settings */
1810 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1811 /* Calculate duration of a frame from buffer properties */
1812 frame_dur = GST_BUFFER_DURATION (buffer);
1813 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1814 parse->priv->acc_duration;
1817 /* No way to figure out frame duration (is this even possible?) */
1821 /* override if subclass provided bitrate, e.g. metadata based */
1822 if (parse->priv->bitrate) {
1823 parse->priv->avg_bitrate = parse->priv->bitrate;
1824 /* spread this (confirmed) info ASAP */
1825 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1826 parse->priv->tags_changed = TRUE;
1830 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1834 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1835 parse->priv->avg_bitrate);
1837 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1840 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1841 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1842 || parse->priv->post_max_bitrate))
1843 parse->priv->tags_changed = TRUE;
1845 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1846 if (frame_bitrate < parse->priv->min_bitrate) {
1847 parse->priv->min_bitrate = frame_bitrate;
1848 if (parse->priv->post_min_bitrate)
1849 parse->priv->tags_changed = TRUE;
1852 if (frame_bitrate > parse->priv->max_bitrate) {
1853 parse->priv->max_bitrate = frame_bitrate;
1854 if (parse->priv->post_max_bitrate)
1855 parse->priv->tags_changed = TRUE;
1858 /* Only update the tag on a 2% change */
1859 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1860 guint64 diffprev = gst_util_uint64_scale_int (100,
1861 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1862 parse->priv->avg_bitrate);
1863 if (diffprev >= UPDATE_THRESHOLD)
1864 parse->priv->tags_changed = TRUE;
1870 * gst_base_parse_add_index_entry:
1871 * @parse: #GstBaseParse.
1872 * @offset: offset of entry
1873 * @ts: timestamp associated with offset
1874 * @key: whether entry refers to keyframe
1875 * @force: add entry disregarding sanity checks
1877 * Adds an entry to the index associating @offset to @ts. It is recommended
1878 * to only add keyframe entries. @force allows to bypass checks, such as
1879 * whether the stream is (upstream) seekable, another entry is already "close"
1880 * to the new entry, etc.
1882 * Returns: #gboolean indicating whether entry was added
1885 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1886 GstClockTime ts, gboolean key, gboolean force)
1888 gboolean ret = FALSE;
1889 GstIndexAssociation associations[2];
1891 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1892 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1894 if (G_LIKELY (!force)) {
1896 if (!parse->priv->upstream_seekable) {
1897 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1901 /* FIXME need better helper data structure that handles these issues
1902 * related to ongoing collecting of index entries */
1903 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1905 GST_LOG_OBJECT (parse,
1906 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1907 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1911 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1912 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1913 parse->priv->idx_interval) {
1914 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1915 GST_TIME_ARGS (parse->priv->index_last_ts));
1919 /* if last is not really the last one */
1920 if (!parse->priv->index_last_valid) {
1921 GstClockTime prev_ts;
1923 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1924 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1925 GST_LOG_OBJECT (parse,
1926 "entry too close to existing entry %" GST_TIME_FORMAT,
1927 GST_TIME_ARGS (prev_ts));
1928 parse->priv->index_last_offset = offset;
1929 parse->priv->index_last_ts = ts;
1935 associations[0].format = GST_FORMAT_TIME;
1936 associations[0].value = ts;
1937 associations[1].format = GST_FORMAT_BYTES;
1938 associations[1].value = offset;
1940 /* index might change on-the-fly, although that would be nutty app ... */
1941 GST_BASE_PARSE_INDEX_LOCK (parse);
1942 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1943 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1944 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1945 (const GstIndexAssociation *) &associations);
1946 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1949 parse->priv->index_last_offset = offset;
1950 parse->priv->index_last_ts = ts;
1959 /* check for seekable upstream, above and beyond a mere query */
1961 gst_base_parse_check_seekability (GstBaseParse * parse)
1964 gboolean seekable = FALSE;
1965 gint64 start = -1, stop = -1;
1966 guint idx_interval = 0;
1967 guint64 idx_byte_interval = 0;
1969 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1970 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1971 GST_DEBUG_OBJECT (parse, "seeking query failed");
1975 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1977 /* try harder to query upstream size if we didn't get it the first time */
1978 if (seekable && stop == -1) {
1979 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1980 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1983 /* if upstream doesn't know the size, it's likely that it's not seekable in
1984 * practice even if it technically may be seekable */
1985 if (seekable && (start != 0 || stop <= start)) {
1986 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1990 /* let's not put every single frame into our index */
1992 if (stop < 10 * 1024 * 1024)
1994 else if (stop < 100 * 1024 * 1024)
1997 idx_interval = 1000;
1999 /* ensure that even for large files (e.g. very long audio files), the index
2000 * stays reasonably-size, with some arbitrary limit to the total number of
2002 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
2003 GST_DEBUG_OBJECT (parse,
2004 "Limiting index entries to %d, indexing byte interval %"
2005 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
2009 gst_query_unref (query);
2011 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
2012 G_GUINT64_FORMAT ")", seekable, start, stop);
2013 parse->priv->upstream_seekable = seekable;
2014 parse->priv->upstream_size = seekable ? stop : 0;
2016 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
2017 parse->priv->idx_interval = idx_interval * GST_MSECOND;
2018 parse->priv->idx_byte_interval = idx_byte_interval;
2021 /* some misc checks on upstream */
2023 gst_base_parse_check_upstream (GstBaseParse * parse)
2027 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
2028 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
2029 /* upstream has one, accept it also, and no further updates */
2030 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
2031 parse->priv->upstream_has_duration = TRUE;
2034 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
2035 parse->priv->upstream_has_duration);
2038 /* checks src caps to determine if dealing with audio or video */
2039 /* TODO maybe forego automagic stuff and let subclass configure it ? */
2041 gst_base_parse_check_media (GstBaseParse * parse)
2046 caps = gst_pad_get_current_caps (parse->srcpad);
2047 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
2048 parse->priv->is_video =
2049 g_str_has_prefix (gst_structure_get_name (s), "video");
2051 /* historical default */
2052 parse->priv->is_video = FALSE;
2055 gst_caps_unref (caps);
2057 parse->priv->checked_media = TRUE;
2058 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
2061 /* takes ownership of frame */
2063 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2065 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2066 /* frame allocated on the heap, we can just take ownership */
2067 g_queue_push_tail (&parse->priv->queued_frames, frame);
2068 GST_TRACE ("queued frame %p", frame);
2070 GstBaseParseFrame *copy;
2072 /* probably allocated on the stack, must make a proper copy */
2073 copy = gst_base_parse_frame_copy (frame);
2074 g_queue_push_tail (&parse->priv->queued_frames, copy);
2075 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2076 gst_base_parse_frame_free (frame);
2080 /* makes sure that @buf is properly prepared and decorated for passing
2081 * to baseclass, and an equally setup frame is returned setup with @buf.
2082 * Takes ownership of @buf. */
2083 static GstBaseParseFrame *
2084 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2086 GstBaseParseFrame *frame = NULL;
2088 buffer = gst_buffer_make_writable (buffer);
2090 GST_LOG_OBJECT (parse,
2091 "preparing frame at offset %" G_GUINT64_FORMAT
2092 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2093 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2094 gst_buffer_get_size (buffer));
2096 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2098 gst_base_parse_update_flags (parse);
2100 frame = gst_base_parse_frame_new (buffer, 0, 0);
2101 gst_buffer_unref (buffer);
2102 gst_base_parse_update_frame (parse, frame);
2104 /* clear flags for next frame */
2105 parse->priv->discont = FALSE;
2106 parse->priv->new_frame = FALSE;
2108 /* use default handler to provide initial (upstream) metadata */
2109 gst_base_parse_parse_frame (parse, frame);
2114 /* Wraps buffer in a frame and dispatches to subclass.
2115 * Also manages data skipping and offset handling (including adapter flushing).
2116 * Takes ownership of @buffer */
2117 static GstFlowReturn
2118 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2119 gint * skip, gint * flushed)
2121 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2122 GstBaseParseFrame *frame;
2125 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2127 GST_LOG_OBJECT (parse,
2128 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2129 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2130 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2131 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2132 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2134 /* track what is being flushed during this single round of frame processing */
2135 parse->priv->flushed = 0;
2138 /* make it easy for _finish_frame to pick up input data */
2139 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2140 gst_buffer_ref (buffer);
2141 gst_adapter_push (parse->priv->adapter, buffer);
2144 frame = gst_base_parse_prepare_frame (parse, buffer);
2145 ret = klass->handle_frame (parse, frame, skip);
2147 *flushed = parse->priv->flushed;
2149 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2152 /* subclass can only do one of these, or semantics are too unclear */
2153 g_assert (*skip == 0 || *flushed == 0);
2155 /* track skipping */
2157 GstClockTime pts, dts;
2160 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2161 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2162 /* reverse playback, and no frames found yet, so we are skipping
2163 * the leading part of a fragment, which may form the tail of
2164 * fragment coming later, hopefully subclass skips efficiently ... */
2165 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2166 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2167 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2168 outbuf = gst_buffer_make_writable (outbuf);
2169 GST_BUFFER_PTS (outbuf) = pts;
2170 GST_BUFFER_DTS (outbuf) = dts;
2171 parse->priv->buffers_head =
2172 g_slist_prepend (parse->priv->buffers_head, outbuf);
2175 /* If we're asked to skip more than is available in the adapter,
2176 we need to remember what we need to skip for next iteration */
2177 gsize av = gst_adapter_available (parse->priv->adapter);
2178 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2180 gst_adapter_flush (parse->priv->adapter, *skip);
2183 ("This is more than available, flushing %" G_GSIZE_FORMAT
2184 ", storing %u to skip", av, (guint) (*skip - av));
2185 parse->priv->skip = *skip - av;
2186 gst_adapter_flush (parse->priv->adapter, av);
2190 if (!parse->priv->discont)
2191 parse->priv->sync_offset = parse->priv->offset;
2192 parse->priv->offset += *skip;
2193 parse->priv->discont = TRUE;
2194 /* check for indefinite skipping */
2195 if (ret == GST_FLOW_OK)
2196 ret = gst_base_parse_check_sync (parse);
2199 parse->priv->offset += *flushed;
2201 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2202 gst_adapter_clear (parse->priv->adapter);
2205 gst_base_parse_frame_free (frame);
2210 /* gst_base_parse_push_pending_events:
2211 * @parse: #GstBaseParse
2213 * Pushes the pending events
2216 gst_base_parse_push_pending_events (GstBaseParse * parse)
2218 if (G_UNLIKELY (parse->priv->pending_events)) {
2219 GList *r = g_list_reverse (parse->priv->pending_events);
2222 parse->priv->pending_events = NULL;
2223 for (l = r; l != NULL; l = l->next) {
2224 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2230 /* gst_base_parse_handle_and_push_frame:
2231 * @parse: #GstBaseParse.
2232 * @klass: #GstBaseParseClass.
2233 * @frame: (transfer full): a #GstBaseParseFrame
2235 * Parses the frame from given buffer and pushes it forward. Also performs
2236 * timestamp handling and checks the segment limits.
2238 * This is called with srcpad STREAM_LOCK held.
2240 * Returns: #GstFlowReturn
2242 static GstFlowReturn
2243 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2244 GstBaseParseFrame * frame)
2249 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2251 buffer = frame->buffer;
2252 offset = frame->offset;
2254 /* check if subclass/format can provide ts.
2255 * If so, that allows and enables extra seek and duration determining options */
2256 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2257 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2258 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2259 parse->priv->first_frame_offset = offset;
2260 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2261 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2262 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2263 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2264 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2265 GST_TIME_ARGS (parse->priv->first_frame_pts),
2266 parse->priv->first_frame_offset);
2267 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2269 GstClockTime last_ts = G_MAXINT64;
2271 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2272 gst_base_parse_locate_time (parse, &last_ts, &off);
2273 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2274 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2277 /* disable further checks */
2278 parse->priv->first_frame_offset = 0;
2282 /* track upstream time if provided, not subclass' internal notion of it */
2283 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2284 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2285 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2288 /* interpolating and no valid pts yet,
2289 * start with dts and carry on from there */
2290 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2291 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2292 parse->priv->next_pts = parse->priv->next_dts;
2294 /* again use default handler to add missing metadata;
2295 * we may have new information on frame properties */
2296 gst_base_parse_parse_frame (parse, frame);
2298 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2299 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2300 parse->priv->next_dts =
2301 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2302 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2303 GstClockTime next_pts =
2304 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2305 if (next_pts >= parse->priv->next_dts)
2306 parse->priv->next_pts = next_pts;
2309 /* we lost track, do not produce bogus time next time around
2310 * (probably means parser subclass has given up on parsing as well) */
2311 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2312 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2315 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2316 GST_BUFFER_PTS_IS_VALID (buffer))
2317 gst_base_parse_add_index_entry (parse, offset,
2318 GST_BUFFER_PTS (buffer),
2319 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2321 /* All OK, push queued frames if there are any */
2322 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2323 GstBaseParseFrame *queued_frame;
2325 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2326 gst_base_parse_push_frame (parse, queued_frame);
2327 gst_base_parse_frame_free (queued_frame);
2331 return gst_base_parse_push_frame (parse, frame);
2335 * gst_base_parse_push_frame:
2336 * @parse: #GstBaseParse.
2337 * @frame: (transfer none): a #GstBaseParseFrame
2339 * Pushes the frame's buffer downstream, sends any pending events and
2340 * does some timestamp and segment handling. Takes ownership of
2341 * frame's buffer, though caller retains ownership of @frame.
2343 * This must be called with sinkpad STREAM_LOCK held.
2345 * Returns: #GstFlowReturn
2348 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2350 GstFlowReturn ret = GST_FLOW_OK;
2351 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2352 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2353 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2357 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2358 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2360 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2362 buffer = frame->buffer;
2364 GST_LOG_OBJECT (parse,
2365 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2366 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2367 gst_buffer_get_size (buffer),
2368 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2369 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2370 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2373 parse->priv->bytecount += frame->size;
2374 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2375 parse->priv->framecount++;
2376 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2377 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2380 /* 0 means disabled */
2381 if (parse->priv->update_interval < 0)
2382 parse->priv->update_interval = 50;
2383 else if (parse->priv->update_interval > 0 &&
2384 (parse->priv->framecount % parse->priv->update_interval) == 0)
2385 gst_base_parse_update_duration (parse);
2387 if (GST_BUFFER_PTS_IS_VALID (buffer))
2388 last_start = last_stop = GST_BUFFER_PTS (buffer);
2389 if (last_start != GST_CLOCK_TIME_NONE
2390 && GST_BUFFER_DURATION_IS_VALID (buffer))
2391 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2393 /* should have caps by now */
2394 if (!gst_pad_has_current_caps (parse->srcpad))
2397 if (G_UNLIKELY (!parse->priv->checked_media)) {
2398 /* have caps; check identity */
2399 gst_base_parse_check_media (parse);
2402 if (parse->priv->tags_changed) {
2403 gst_base_parse_queue_tag_event_update (parse);
2404 parse->priv->tags_changed = FALSE;
2407 /* Push pending events, including SEGMENT events */
2408 gst_base_parse_push_pending_events (parse);
2410 /* segment adjustment magic; only if we are running the whole show */
2411 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2412 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2413 parse->priv->upstream_seekable)) {
2415 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2416 GST_CLOCK_TIME_IS_VALID (last_start)) {
2417 GstClockTimeDiff diff;
2419 /* only send newsegments with increasing start times,
2420 * otherwise if these go back and forth downstream (sinks) increase
2421 * accumulated time and running_time */
2422 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2423 if (G_UNLIKELY (diff > 2 * GST_SECOND
2424 && last_start > parse->segment.start
2425 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2426 || last_start < parse->segment.stop))) {
2428 GST_DEBUG_OBJECT (parse,
2429 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2430 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2431 "Sending updated SEGMENT events", diff,
2432 GST_TIME_ARGS (parse->segment.position),
2433 GST_TIME_ARGS (last_start));
2435 /* skip gap FIXME */
2436 gst_pad_push_event (parse->srcpad,
2437 gst_event_new_segment (&parse->segment));
2439 parse->segment.position = last_start;
2444 /* update bitrates and optionally post corresponding tags
2445 * (following newsegment) */
2446 gst_base_parse_update_bitrates (parse, frame);
2448 if (klass->pre_push_frame) {
2449 ret = klass->pre_push_frame (parse, frame);
2451 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2454 /* Push pending events, if there are any new ones
2455 * like tags added by pre_push_frame */
2456 if (parse->priv->tags_changed) {
2457 gst_base_parse_queue_tag_event_update (parse);
2458 parse->priv->tags_changed = FALSE;
2460 gst_base_parse_push_pending_events (parse);
2462 /* take final ownership of frame buffer */
2463 if (frame->out_buffer) {
2464 buffer = frame->out_buffer;
2465 frame->out_buffer = NULL;
2466 gst_buffer_replace (&frame->buffer, NULL);
2468 buffer = frame->buffer;
2469 frame->buffer = NULL;
2472 /* subclass must play nice */
2473 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2475 size = gst_buffer_get_size (buffer);
2477 parse->priv->seen_keyframe |= parse->priv->is_video &&
2478 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2480 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2481 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2482 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2483 GST_BUFFER_TIMESTAMP (buffer) >
2484 parse->segment.stop + parse->priv->lead_out_ts) {
2485 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2487 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2488 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2489 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2490 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2491 parse->priv->lead_in_ts < parse->segment.start) {
2492 if (parse->priv->seen_keyframe) {
2493 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2496 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2497 ret = GST_BASE_PARSE_FLOW_DROPPED;
2504 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2505 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2506 gst_buffer_unref (buffer);
2508 } else if (ret == GST_FLOW_OK) {
2509 if (parse->segment.rate > 0.0) {
2510 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2512 ret = gst_pad_push (parse->srcpad, buffer);
2513 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2514 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2516 /* in backwards playback mode, if on passthrough we need to push buffers
2517 * directly without accumulating them into the buffers_queued as baseparse
2518 * will never check for a DISCONT while on passthrough and those buffers
2519 * will never be pushed.
2521 * also, as we are on reverse playback, it might be possible that
2522 * passthrough might have just been enabled, so make sure to drain the
2523 * buffers_queued list */
2524 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2525 gst_base_parse_finish_fragment (parse, TRUE);
2526 ret = gst_base_parse_send_buffers (parse);
2529 if (ret == GST_FLOW_OK) {
2530 GST_LOG_OBJECT (parse,
2531 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2532 ret = gst_pad_push (parse->srcpad, buffer);
2533 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2534 gst_flow_get_name (ret));
2536 GST_LOG_OBJECT (parse,
2537 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2538 gst_flow_get_name (ret));
2539 gst_buffer_unref (buffer);
2543 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2545 parse->priv->buffers_queued =
2546 g_slist_prepend (parse->priv->buffers_queued, buffer);
2550 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2551 size, gst_flow_get_name (ret));
2552 gst_buffer_unref (buffer);
2553 /* if we are not sufficiently in control, let upstream decide on EOS */
2554 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2555 (parse->priv->passthrough ||
2556 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2557 !parse->priv->upstream_seekable)))
2561 /* Update current running segment position */
2562 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2563 && last_stop != GST_CLOCK_TIME_NONE
2564 && parse->segment.position < last_stop)
2565 parse->segment.position = last_stop;
2572 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2573 return GST_FLOW_FLUSHING;
2575 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2576 return GST_FLOW_ERROR;
2581 * gst_base_parse_finish_frame:
2582 * @parse: a #GstBaseParse
2583 * @frame: a #GstBaseParseFrame
2584 * @size: consumed input data represented by frame
2586 * Collects parsed data and pushes this downstream.
2587 * Source pad caps must be set when this is called.
2589 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2590 * Otherwise, @size samples will be taken from the input and used for output,
2591 * and the output's metadata (timestamps etc) will be taken as (optionally)
2592 * set by the subclass on @frame's (input) buffer (which is otherwise
2593 * ignored for any but the above purpose/information).
2595 * Note that the latter buffer is invalidated by this call, whereas the
2596 * caller retains ownership of @frame.
2598 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2601 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2604 GstFlowReturn ret = GST_FLOW_OK;
2606 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2607 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2608 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2609 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2612 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2613 "flushing size %d", frame->offset, size);
2615 /* some one-time start-up */
2616 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2617 gst_base_parse_check_seekability (parse);
2618 gst_base_parse_check_upstream (parse);
2621 parse->priv->flushed += size;
2623 if (parse->priv->scanning && frame->buffer) {
2624 if (!parse->priv->scanned_frame) {
2625 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2630 /* either PUSH or PULL mode arranges for adapter data */
2631 /* ensure output buffer */
2632 if (!frame->out_buffer) {
2633 GstBuffer *src, *dest;
2635 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2636 dest = frame->out_buffer;
2637 src = frame->buffer;
2638 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2639 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2640 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2641 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2642 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2643 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2645 gst_adapter_flush (parse->priv->adapter, size);
2648 /* use as input for subsequent processing */
2649 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2650 gst_buffer_unref (frame->out_buffer);
2651 frame->out_buffer = NULL;
2653 /* mark input size consumed */
2656 /* subclass might queue frames/data internally if it needs more
2657 * frames to decide on the format, or might request us to queue here. */
2658 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2659 gst_buffer_replace (&frame->buffer, NULL);
2661 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2662 GstBaseParseFrame *copy;
2664 copy = gst_base_parse_frame_copy (frame);
2665 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2666 gst_base_parse_queue_frame (parse, copy);
2670 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2676 /* gst_base_parse_drain:
2678 * Drains the adapter until it is empty. It decreases the min_frame_size to
2679 * match the current adapter size and calls chain method until the adapter
2680 * is emptied or chain returns with error.
2683 gst_base_parse_drain (GstBaseParse * parse)
2687 GST_DEBUG_OBJECT (parse, "draining");
2688 parse->priv->drain = TRUE;
2691 avail = gst_adapter_available (parse->priv->adapter);
2695 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2696 NULL) != GST_FLOW_OK) {
2700 /* nothing changed, maybe due to truncated frame; break infinite loop */
2701 if (avail == gst_adapter_available (parse->priv->adapter)) {
2702 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2703 gst_adapter_clear (parse->priv->adapter);
2707 parse->priv->drain = FALSE;
2710 /* gst_base_parse_send_buffers
2712 * Sends buffers collected in send_buffers downstream, and ensures that list
2713 * is empty at the end (errors or not).
2715 static GstFlowReturn
2716 gst_base_parse_send_buffers (GstBaseParse * parse)
2718 GSList *send = NULL;
2720 GstFlowReturn ret = GST_FLOW_OK;
2721 gboolean first = TRUE;
2723 send = parse->priv->buffers_send;
2727 buf = GST_BUFFER_CAST (send->data);
2728 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2729 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2730 ", offset %" G_GINT64_FORMAT, buf,
2731 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2732 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2733 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2735 /* Make sure the first buffer is always DISCONT. If we split
2736 * GOPs inside the parser this is otherwise not guaranteed */
2738 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2742 /* iterate output queue an push downstream */
2743 ret = gst_pad_push (parse->srcpad, buf);
2744 send = g_slist_delete_link (send, send);
2746 /* clear any leftover if error */
2747 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2749 buf = GST_BUFFER_CAST (send->data);
2750 gst_buffer_unref (buf);
2751 send = g_slist_delete_link (send, send);
2756 parse->priv->buffers_send = send;
2761 /* gst_base_parse_start_fragment:
2763 * Prepares for processing a reverse playback (forward) fragment
2764 * by (re)setting proper state variables.
2766 static GstFlowReturn
2767 gst_base_parse_start_fragment (GstBaseParse * parse)
2769 GST_LOG_OBJECT (parse, "starting fragment");
2771 /* invalidate so no fall-back timestamping is performed;
2772 * ok if taken from subclass or upstream */
2773 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2774 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2775 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2776 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2777 parse->priv->prev_dts_from_pts = FALSE;
2778 /* prevent it hanging around stop all the time */
2779 parse->segment.position = GST_CLOCK_TIME_NONE;
2781 parse->priv->discont = TRUE;
2783 /* head of previous fragment is now pending tail of current fragment */
2784 parse->priv->buffers_pending = parse->priv->buffers_head;
2785 parse->priv->buffers_head = NULL;
2791 /* gst_base_parse_finish_fragment:
2793 * Processes a reverse playback (forward) fragment:
2794 * - append head of last fragment that was skipped to current fragment data
2795 * - drain the resulting current fragment data (i.e. repeated chain)
2796 * - add time/duration (if needed) to frames queued by chain
2797 * - push queued data
2799 static GstFlowReturn
2800 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2803 GstFlowReturn ret = GST_FLOW_OK;
2804 gboolean seen_key = FALSE, seen_delta = FALSE;
2806 GST_LOG_OBJECT (parse, "finishing fragment");
2809 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2810 while (parse->priv->buffers_pending) {
2811 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2813 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2814 gst_buffer_get_size (buf));
2815 gst_adapter_push (parse->priv->adapter, buf);
2817 GST_LOG_OBJECT (parse, "discarding head buffer");
2818 gst_buffer_unref (buf);
2820 parse->priv->buffers_pending =
2821 g_slist_delete_link (parse->priv->buffers_pending,
2822 parse->priv->buffers_pending);
2825 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2826 /* initial skipped data is added to buffers_pending */
2827 gst_base_parse_drain (parse);
2829 if (parse->priv->buffers_send) {
2830 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2831 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2834 /* add metadata (if needed to queued buffers */
2835 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2836 GST_TIME_ARGS (parse->priv->last_pts));
2837 while (parse->priv->buffers_queued) {
2838 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2840 /* no touching if upstream or parsing provided time */
2841 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2842 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2843 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2844 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2845 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2846 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2847 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2849 parse->priv->last_pts = 0;
2850 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2851 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2852 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2854 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2855 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2856 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2858 parse->priv->last_dts = 0;
2859 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2860 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2861 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2864 /* no idea, very bad */
2865 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2868 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2869 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2871 /* reverse order for ascending sending */
2872 /* send downstream at keyframe not preceded by a keyframe
2873 * (e.g. that should identify start of collection of IDR nals) */
2874 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2876 ret = gst_base_parse_send_buffers (parse);
2877 /* if a problem, throw all to sending */
2878 if (ret != GST_FLOW_OK) {
2879 parse->priv->buffers_send =
2880 g_slist_reverse (parse->priv->buffers_queued);
2881 parse->priv->buffers_queued = NULL;
2891 parse->priv->buffers_send =
2892 g_slist_prepend (parse->priv->buffers_send, buf);
2893 parse->priv->buffers_queued =
2894 g_slist_delete_link (parse->priv->buffers_queued,
2895 parse->priv->buffers_queued);
2898 /* audio may have all marked as keyframe, so arrange to send here. Also
2899 * we might have ended the loop above on a keyframe, in which case we
2901 if (!seen_delta || seen_key)
2902 ret = gst_base_parse_send_buffers (parse);
2904 /* any trailing unused no longer usable (ideally none) */
2905 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2906 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2907 gst_adapter_available (parse->priv->adapter));
2908 gst_adapter_clear (parse->priv->adapter);
2914 /* small helper that checks whether we have been trying to resync too long */
2915 static inline GstFlowReturn
2916 gst_base_parse_check_sync (GstBaseParse * parse)
2918 if (G_UNLIKELY (parse->priv->discont &&
2919 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2920 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2921 ("Failed to parse stream"), (NULL));
2922 return GST_FLOW_ERROR;
2928 static GstFlowReturn
2929 gst_base_parse_process_streamheader (GstBaseParse * parse)
2933 const GValue *value;
2934 GstFlowReturn ret = GST_FLOW_OK;
2936 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2940 str = gst_caps_get_structure (caps, 0);
2941 value = gst_structure_get_value (str, "streamheader");
2945 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2947 if (GST_VALUE_HOLDS_ARRAY (value)) {
2949 gsize len = gst_value_array_get_size (value);
2951 for (i = 0; i < len; i++) {
2953 gst_value_get_buffer (gst_value_array_get_value (value, i));
2955 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2956 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2959 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2960 GstBuffer *buffer = gst_value_get_buffer (value);
2962 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2963 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2966 gst_caps_unref (caps);
2973 gst_caps_unref (caps);
2976 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2981 static GstFlowReturn
2982 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2984 GstBaseParseClass *bclass;
2985 GstBaseParse *parse;
2986 GstFlowReturn ret = GST_FLOW_OK;
2987 GstFlowReturn old_ret = GST_FLOW_OK;
2988 GstBuffer *tmpbuf = NULL;
2992 GstClockTime pts, dts;
2994 parse = GST_BASE_PARSE (parent);
2995 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2996 GST_DEBUG_OBJECT (parent, "chain");
2998 /* early out for speed, if we need to skip */
2999 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
3000 parse->priv->skip = 0;
3001 if (parse->priv->skip > 0) {
3002 gsize bsize = gst_buffer_get_size (buffer);
3003 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
3005 if (parse->priv->skip >= bsize) {
3006 parse->priv->skip -= bsize;
3007 GST_DEBUG ("All the buffer is skipped");
3008 parse->priv->offset += bsize;
3009 parse->priv->sync_offset = parse->priv->offset;
3012 buffer = gst_buffer_make_writable (buffer);
3013 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
3014 parse->priv->offset += parse->priv->skip;
3015 GST_DEBUG ("Done skipping, we have %u left on this buffer",
3016 (unsigned) (bsize - parse->priv->skip));
3017 parse->priv->skip = 0;
3018 parse->priv->discont = TRUE;
3021 if (G_UNLIKELY (parse->priv->first_buffer)) {
3022 parse->priv->first_buffer = FALSE;
3023 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
3024 /* this stream has no header buffers, check if we just prepend the
3025 * streamheader from caps to the stream */
3026 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
3027 "prepend to the stream");
3028 gst_base_parse_process_streamheader (parse);
3030 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
3031 "streamheader from caps");
3035 if (parse->priv->detecting) {
3036 GstBuffer *detect_buf;
3038 if (parse->priv->detect_buffers_size == 0) {
3039 detect_buf = gst_buffer_ref (buffer);
3044 detect_buf = gst_buffer_new ();
3046 for (l = parse->priv->detect_buffers; l; l = l->next) {
3047 gsize tmpsize = gst_buffer_get_size (l->data);
3049 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
3050 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3054 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3055 offset, gst_buffer_get_size (buffer));
3058 ret = bclass->detect (parse, detect_buf);
3059 gst_buffer_unref (detect_buf);
3061 if (ret == GST_FLOW_OK) {
3064 /* Detected something */
3065 parse->priv->detecting = FALSE;
3067 for (l = parse->priv->detect_buffers; l; l = l->next) {
3068 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3070 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3071 parent, GST_BUFFER_CAST (l->data));
3073 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3075 g_list_free (parse->priv->detect_buffers);
3076 parse->priv->detect_buffers = NULL;
3077 parse->priv->detect_buffers_size = 0;
3079 if (ret != GST_FLOW_OK) {
3083 /* Handle the current buffer */
3084 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3085 /* Still detecting, append buffer or error out if draining */
3087 if (parse->priv->drain) {
3088 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3089 return GST_FLOW_ERROR;
3090 } else if (parse->priv->flushing) {
3091 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3093 g_list_free (parse->priv->detect_buffers);
3094 parse->priv->detect_buffers = NULL;
3095 parse->priv->detect_buffers_size = 0;
3097 parse->priv->detect_buffers =
3098 g_list_append (parse->priv->detect_buffers, buffer);
3099 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3103 /* Something went wrong, subclass responsible for error reporting */
3107 /* And now handle the current buffer if detection worked */
3110 if (G_LIKELY (buffer)) {
3111 GST_LOG_OBJECT (parse,
3112 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3113 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3114 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3115 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3116 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3118 if (G_UNLIKELY (!parse->priv->disable_passthrough
3119 && parse->priv->passthrough)) {
3120 GstBaseParseFrame frame;
3122 gst_base_parse_frame_init (&frame);
3123 frame.buffer = gst_buffer_make_writable (buffer);
3124 ret = gst_base_parse_push_frame (parse, &frame);
3125 gst_base_parse_frame_free (&frame);
3128 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3129 /* upstream feeding us in reverse playback;
3130 * finish previous fragment and start new upon DISCONT */
3131 if (parse->segment.rate < 0.0) {
3132 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3133 ret = gst_base_parse_finish_fragment (parse, TRUE);
3134 gst_base_parse_start_fragment (parse);
3136 /* discont in the stream, drain and mark discont for next output */
3137 gst_base_parse_drain (parse);
3138 parse->priv->discont = TRUE;
3141 gst_adapter_push (parse->priv->adapter, buffer);
3144 /* Parse and push as many frames as possible */
3145 /* Stop either when adapter is empty or we are flushing */
3146 while (!parse->priv->flushing) {
3148 gboolean updated_prev_pts = FALSE;
3150 /* note: if subclass indicates MAX fsize,
3151 * this will not likely be available anyway ... */
3152 min_size = MAX (parse->priv->min_frame_size, fsize);
3153 av = gst_adapter_available (parse->priv->adapter);
3155 if (G_UNLIKELY (parse->priv->drain)) {
3157 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3158 if (G_UNLIKELY (!min_size)) {
3163 /* Collect at least min_frame_size bytes */
3164 if (av < min_size) {
3165 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3169 /* move along with upstream timestamp (if any),
3170 * but interpolate in between */
3171 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3172 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3173 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts)) {
3174 parse->priv->prev_pts = parse->priv->next_pts = pts;
3175 updated_prev_pts = TRUE;
3178 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
3179 parse->priv->prev_dts = parse->priv->next_dts = dts;
3180 parse->priv->prev_dts_from_pts = FALSE;
3183 /* we can mess with, erm interpolate, timestamps,
3184 * and incoming stuff has PTS but no DTS seen so far,
3185 * then pick up DTS from PTS and hope for the best ... */
3186 if (parse->priv->infer_ts &&
3187 parse->priv->pts_interpolate &&
3188 !GST_CLOCK_TIME_IS_VALID (dts) &&
3189 (!GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts)
3190 || (parse->priv->prev_dts_from_pts && updated_prev_pts))
3191 && GST_CLOCK_TIME_IS_VALID (pts)) {
3192 parse->priv->prev_dts = parse->priv->next_dts = pts;
3193 parse->priv->prev_dts_from_pts = TRUE;
3196 /* always pass all available data */
3197 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3199 /* already inform subclass what timestamps we have planned,
3200 * at least if provided by time-based upstream */
3201 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3202 tmpbuf = gst_buffer_make_writable (tmpbuf);
3203 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3204 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3205 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3208 /* keep the adapter mapped, so keep track of what has to be flushed */
3209 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3212 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3215 if (skip == 0 && flush == 0) {
3216 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3217 "breaking to get more data");
3218 /* ignore this return as it produced no data */
3226 GST_LOG_OBJECT (parse, "chain leaving");
3230 /* pull @size bytes at current offset,
3231 * i.e. at least try to and possibly return a shorter buffer if near the end */
3232 static GstFlowReturn
3233 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3234 GstBuffer ** buffer)
3236 GstFlowReturn ret = GST_FLOW_OK;
3238 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3240 /* Caching here actually makes much less difference than one would expect.
3241 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3242 if (parse->priv->cache) {
3243 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3244 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3246 if (cache_offset <= parse->priv->offset &&
3247 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3248 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3249 parse->priv->offset - cache_offset, size);
3250 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3253 /* not enough data in the cache, free cache and get a new one */
3254 gst_buffer_unref (parse->priv->cache);
3255 parse->priv->cache = NULL;
3258 /* refill the cache */
3260 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3261 64 * 1024), &parse->priv->cache);
3262 if (ret != GST_FLOW_OK) {
3263 parse->priv->cache = NULL;
3267 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3269 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3271 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3275 /* Not possible to get enough data, try a last time with
3276 * requesting exactly the size we need */
3277 gst_buffer_unref (parse->priv->cache);
3278 parse->priv->cache = NULL;
3280 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3281 &parse->priv->cache);
3283 if (ret != GST_FLOW_OK) {
3284 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3289 if (gst_buffer_get_size (parse->priv->cache) < size) {
3290 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3291 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3292 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3294 *buffer = parse->priv->cache;
3295 parse->priv->cache = NULL;
3301 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3302 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3307 static GstFlowReturn
3308 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3311 GstClockTime ts = 0;
3315 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3316 ", last_offset = %" G_GINT64_FORMAT,
3317 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3319 if (!parse->priv->last_offset
3320 || parse->priv->last_pts <= parse->segment.start) {
3321 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3322 GST_TIME_ARGS (parse->segment.start));
3327 /* last fragment started at last_offset / last_ts;
3328 * seek back 10s capped at 1MB */
3329 if (parse->priv->last_pts >= 10 * GST_SECOND)
3330 ts = parse->priv->last_pts - 10 * GST_SECOND;
3331 /* if we are exact now, we will be more so going backwards */
3332 if (parse->priv->exact_position) {
3333 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3335 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3336 GST_FORMAT_BYTES, &offset)) {
3337 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3340 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3341 parse->priv->last_offset - 1024);
3342 offset = MAX (0, offset);
3344 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3346 parse->priv->offset = offset;
3348 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3350 if (ret != GST_FLOW_OK)
3353 /* offset will increase again as fragment is processed/parsed */
3354 parse->priv->last_offset = offset;
3356 gst_base_parse_start_fragment (parse);
3357 gst_adapter_push (parse->priv->adapter, buffer);
3358 ret = gst_base_parse_finish_fragment (parse, TRUE);
3359 if (ret != GST_FLOW_OK)
3362 /* force previous fragment */
3363 parse->priv->offset = -1;
3370 * pull and scan for next frame starting from current offset
3371 * ajusts sync, drain and offset going along */
3372 static GstFlowReturn
3373 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3376 GstFlowReturn ret = GST_FLOW_OK;
3377 guint fsize, min_size;
3381 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3382 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3384 /* let's make this efficient for all subclass once and for all;
3385 * maybe it does not need this much, but in the latter case, we know we are
3386 * in pull mode here and might as well try to read and supply more anyway
3387 * (so does the buffer caching mechanism) */
3391 min_size = MAX (parse->priv->min_frame_size, fsize);
3393 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3395 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3396 if (ret != GST_FLOW_OK)
3399 /* if we got a short read, inform subclass we are draining leftover
3400 * and no more is to be expected */
3401 if (gst_buffer_get_size (buffer) < min_size) {
3402 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3403 parse->priv->drain = TRUE;
3406 if (parse->priv->detecting) {
3407 ret = klass->detect (parse, buffer);
3408 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3409 /* If draining we error out, otherwise request a buffer
3411 if (parse->priv->drain) {
3412 gst_buffer_unref (buffer);
3413 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3414 return GST_FLOW_ERROR;
3417 gst_buffer_unref (buffer);
3420 } else if (ret != GST_FLOW_OK) {
3421 gst_buffer_unref (buffer);
3422 GST_ERROR_OBJECT (parse, "detect() returned %s",
3423 gst_flow_get_name (ret));
3427 /* Else handle this buffer normally */
3430 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3431 if (ret != GST_FLOW_OK)
3434 /* If a large amount of data was requested to be skipped, _handle_buffer
3435 might have set the priv->skip flag to an extra amount on top of skip.
3436 In pull mode, we can just pull from the new offset directly. */
3437 parse->priv->offset += parse->priv->skip;
3438 parse->priv->skip = 0;
3440 /* something flushed means something happened,
3441 * and we should bail out of this loop so as not to occupy
3442 * the task thread indefinitely */
3444 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3447 /* nothing flushed, no skip and draining, so nothing left to do */
3448 if (!skip && parse->priv->drain) {
3449 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3450 "breaking loop and marking EOS");
3454 /* otherwise, get some more data
3455 * note that is checked this does not happen indefinitely */
3457 GST_LOG_OBJECT (parse, "getting some more data");
3460 parse->priv->drain = FALSE;
3467 /* Loop that is used in pull mode to retrieve data from upstream */
3469 gst_base_parse_loop (GstPad * pad)
3471 GstBaseParse *parse;
3472 GstBaseParseClass *klass;
3473 GstFlowReturn ret = GST_FLOW_OK;
3475 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3476 klass = GST_BASE_PARSE_GET_CLASS (parse);
3478 GST_LOG_OBJECT (parse, "Entering parse loop");
3480 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3485 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3488 event = gst_event_new_stream_start (stream_id);
3489 gst_event_set_group_id (event, gst_util_group_id_next ());
3491 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3492 gst_pad_push_event (parse->srcpad, event);
3493 parse->priv->push_stream_start = FALSE;
3497 /* reverse playback:
3498 * first fragment (closest to stop time) is handled normally below,
3499 * then we pull in fragments going backwards */
3500 if (parse->segment.rate < 0.0) {
3501 /* check if we jumped back to a previous fragment,
3502 * which is a post-first fragment */
3503 if (parse->priv->offset < 0) {
3504 ret = gst_base_parse_handle_previous_fragment (parse);
3509 ret = gst_base_parse_scan_frame (parse, klass);
3511 /* eat expected eos signalling past segment in reverse playback */
3512 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3513 parse->segment.position >= parse->segment.stop) {
3514 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3515 /* push what was accumulated during loop run */
3516 gst_base_parse_finish_fragment (parse, FALSE);
3517 /* force previous fragment */
3518 parse->priv->offset = -1;
3522 if (ret != GST_FLOW_OK)
3526 if (ret == GST_FLOW_EOS)
3528 else if (ret != GST_FLOW_OK)
3531 gst_object_unref (parse);
3538 GST_DEBUG_OBJECT (parse, "eos");
3543 gboolean push_eos = FALSE;
3545 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3546 gst_flow_get_name (ret));
3547 gst_pad_pause_task (parse->sinkpad);
3549 if (ret == GST_FLOW_EOS) {
3550 /* handle end-of-stream/segment */
3551 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3554 if ((stop = parse->segment.stop) == -1)
3555 stop = parse->segment.duration;
3557 GST_DEBUG_OBJECT (parse, "sending segment_done");
3559 gst_element_post_message
3560 (GST_ELEMENT_CAST (parse),
3561 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3562 GST_FORMAT_TIME, stop));
3563 gst_pad_push_event (parse->srcpad,
3564 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3566 /* If we STILL have zero frames processed, fire an error */
3567 if (parse->priv->framecount == 0) {
3568 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3569 ("No valid frames found before end of stream"), (NULL));
3573 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3574 /* for fatal errors we post an error message, wrong-state is
3575 * not fatal because it happens due to flushes and only means
3576 * that we should stop now. */
3577 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3578 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3582 if (parse->priv->estimated_duration <= 0) {
3583 gst_base_parse_update_duration (parse);
3585 /* Push pending events, including SEGMENT events */
3586 gst_base_parse_push_pending_events (parse);
3588 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3590 gst_object_unref (parse);
3595 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3597 GstSchedulingFlags sched_flags;
3598 GstBaseParse *parse;
3602 parse = GST_BASE_PARSE (parent);
3604 GST_DEBUG_OBJECT (parse, "sink activate");
3606 query = gst_query_new_scheduling ();
3607 if (!gst_pad_peer_query (sinkpad, query)) {
3608 gst_query_unref (query);
3609 goto baseparse_push;
3612 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3614 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3615 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3617 gst_query_unref (query);
3620 goto baseparse_push;
3622 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3623 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3624 goto baseparse_push;
3626 parse->priv->push_stream_start = TRUE;
3628 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3633 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3634 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3639 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3641 GstBaseParseClass *klass;
3642 gboolean result = TRUE;
3644 GST_DEBUG_OBJECT (parse, "activate %d", active);
3646 klass = GST_BASE_PARSE_GET_CLASS (parse);
3649 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3650 result = klass->start (parse);
3652 /* If the subclass implements ::detect we want to
3653 * call it for the first buffers now */
3654 parse->priv->detecting = (klass->detect != NULL);
3656 /* We must make sure streaming has finished before resetting things
3657 * and calling the ::stop vfunc */
3658 GST_PAD_STREAM_LOCK (parse->sinkpad);
3659 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3661 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3662 result = klass->stop (parse);
3664 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3666 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3671 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3672 GstPadMode mode, gboolean active)
3675 GstBaseParse *parse;
3677 parse = GST_BASE_PARSE (parent);
3679 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3680 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3682 if (!gst_base_parse_activate (parse, active))
3683 goto activate_failed;
3686 case GST_PAD_MODE_PULL:
3688 parse->priv->pending_events =
3689 g_list_prepend (parse->priv->pending_events,
3690 gst_event_new_segment (&parse->segment));
3693 result = gst_pad_stop_task (pad);
3701 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3703 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3710 GST_DEBUG_OBJECT (parse, "activate failed");
3716 * gst_base_parse_set_duration:
3717 * @parse: #GstBaseParse.
3719 * @duration: duration value.
3720 * @interval: how often to update the duration estimate based on bitrate, or 0.
3722 * Sets the duration of the currently playing media. Subclass can use this
3723 * when it is able to determine duration and/or notices a change in the media
3724 * duration. Alternatively, if @interval is non-zero (default), then stream
3725 * duration is determined based on estimated bitrate, and updated every @interval
3729 gst_base_parse_set_duration (GstBaseParse * parse,
3730 GstFormat fmt, gint64 duration, gint interval)
3732 g_return_if_fail (parse != NULL);
3734 if (parse->priv->upstream_has_duration) {
3735 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3739 if (duration != parse->priv->duration) {
3742 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3743 gst_element_post_message (GST_ELEMENT (parse), m);
3745 /* TODO: what about duration tag? */
3747 parse->priv->duration = duration;
3748 parse->priv->duration_fmt = fmt;
3749 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3750 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3751 if (interval != 0) {
3752 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3756 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3757 parse->priv->update_interval = interval;
3763 * gst_base_parse_set_average_bitrate:
3764 * @parse: #GstBaseParse.
3765 * @bitrate: average bitrate in bits/second
3767 * Optionally sets the average bitrate detected in media (if non-zero),
3768 * e.g. based on metadata, as it will be posted to the application.
3770 * By default, announced average bitrate is estimated. The average bitrate
3771 * is used to estimate the total duration of the stream and to estimate
3772 * a seek position, if there's no index and the format is syncable
3773 * (see gst_base_parse_set_syncable()).
3776 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3778 parse->priv->bitrate = bitrate;
3779 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3783 * gst_base_parse_set_min_frame_size:
3784 * @parse: #GstBaseParse.
3785 * @min_size: Minimum size of the data that this base class should give to
3788 * Subclass can use this function to tell the base class that it needs to
3789 * give at least #min_size buffers.
3792 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3794 g_return_if_fail (parse != NULL);
3796 parse->priv->min_frame_size = min_size;
3797 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3801 * gst_base_parse_set_frame_rate:
3802 * @parse: the #GstBaseParse to set
3803 * @fps_num: frames per second (numerator).
3804 * @fps_den: frames per second (denominator).
3805 * @lead_in: frames needed before a segment for subsequent decode
3806 * @lead_out: frames needed after a segment
3808 * If frames per second is configured, parser can take care of buffer duration
3809 * and timestamping. When performing segment clipping, or seeking to a specific
3810 * location, a corresponding decoder might need an initial @lead_in and a
3811 * following @lead_out number of frames to ensure the desired segment is
3812 * entirely filled upon decoding.
3815 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3816 guint fps_den, guint lead_in, guint lead_out)
3818 g_return_if_fail (parse != NULL);
3820 parse->priv->fps_num = fps_num;
3821 parse->priv->fps_den = fps_den;
3822 if (!fps_num || !fps_den) {
3823 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3825 fps_num = fps_den = 0;
3826 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3827 parse->priv->lead_in = parse->priv->lead_out = 0;
3828 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3830 parse->priv->frame_duration =
3831 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3832 parse->priv->lead_in = lead_in;
3833 parse->priv->lead_out = lead_out;
3834 parse->priv->lead_in_ts =
3835 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3836 parse->priv->lead_out_ts =
3837 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3838 /* aim for about 1.5s to estimate duration */
3839 if (parse->priv->update_interval < 0) {
3840 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3841 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3842 parse->priv->update_interval);
3845 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3846 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3847 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3848 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3849 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3850 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3854 * gst_base_parse_set_has_timing_info:
3855 * @parse: a #GstBaseParse
3856 * @has_timing: whether frames carry timing information
3858 * Set if frames carry timing information which the subclass can (generally)
3859 * parse and provide. In particular, intrinsic (rather than estimated) time
3860 * can be obtained following a seek.
3863 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3865 parse->priv->has_timing_info = has_timing;
3866 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3870 * gst_base_parse_set_syncable:
3871 * @parse: a #GstBaseParse
3872 * @syncable: set if frame starts can be identified
3874 * Set if frame starts can be identified. This is set by default and
3875 * determines whether seeking based on bitrate averages
3876 * is possible for a format/stream.
3879 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3881 parse->priv->syncable = syncable;
3882 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3886 * gst_base_parse_set_passthrough:
3887 * @parse: a #GstBaseParse
3888 * @passthrough: %TRUE if parser should run in passthrough mode
3890 * Set if the nature of the format or configuration does not allow (much)
3891 * parsing, and the parser should operate in passthrough mode (which only
3892 * applies when operating in push mode). That is, incoming buffers are
3893 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3894 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3895 * so subclass can perform as much or as little is appropriate for
3896 * passthrough semantics in @pre_push_frame.
3899 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3901 parse->priv->passthrough = passthrough;
3902 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3906 * gst_base_parse_set_pts_interpolation:
3907 * @parse: a #GstBaseParse
3908 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3910 * By default, the base class will guess PTS timestamps using a simple
3911 * interpolation (previous timestamp + duration), which is incorrect for
3912 * data streams with reordering, where PTS can go backward. Sub-classes
3913 * implementing such formats should disable PTS interpolation.
3916 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3917 gboolean pts_interpolate)
3919 parse->priv->pts_interpolate = pts_interpolate;
3920 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3921 (pts_interpolate) ? "yes" : "no");
3925 * gst_base_parse_set_infer_ts:
3926 * @parse: a #GstBaseParse
3927 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3929 * By default, the base class might try to infer PTS from DTS and vice
3930 * versa. While this is generally correct for audio data, it may not
3931 * be otherwise. Sub-classes implementing such formats should disable
3932 * timestamp inferring.
3935 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3937 parse->priv->infer_ts = infer_ts;
3938 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3942 * gst_base_parse_set_latency:
3943 * @parse: a #GstBaseParse
3944 * @min_latency: minimum parse latency
3945 * @max_latency: maximum parse latency
3947 * Sets the minimum and maximum (which may likely be equal) latency introduced
3948 * by the parsing process. If there is such a latency, which depends on the
3949 * particular parsing of the format, it typically corresponds to 1 frame duration.
3952 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3953 GstClockTime max_latency)
3955 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3956 g_return_if_fail (min_latency <= max_latency);
3958 GST_OBJECT_LOCK (parse);
3959 parse->priv->min_latency = min_latency;
3960 parse->priv->max_latency = max_latency;
3961 GST_OBJECT_UNLOCK (parse);
3962 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3963 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3964 GST_TIME_ARGS (max_latency));
3968 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3969 GstClockTime * duration)
3971 gboolean res = FALSE;
3973 g_return_val_if_fail (duration != NULL, FALSE);
3975 *duration = GST_CLOCK_TIME_NONE;
3976 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3977 GST_LOG_OBJECT (parse, "using provided duration");
3978 *duration = parse->priv->duration;
3980 } else if (parse->priv->duration != -1) {
3981 GST_LOG_OBJECT (parse, "converting provided duration");
3982 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3983 parse->priv->duration, format, (gint64 *) duration);
3984 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3985 GST_LOG_OBJECT (parse, "using estimated duration");
3986 *duration = parse->priv->estimated_duration;
3989 GST_LOG_OBJECT (parse, "cannot estimate duration");
3992 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3993 GST_TIME_ARGS (*duration));
3998 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
4000 gboolean res = FALSE;
4003 pad = GST_BASE_PARSE_SRC_PAD (parse);
4005 switch (GST_QUERY_TYPE (query)) {
4006 case GST_QUERY_POSITION:
4011 GST_DEBUG_OBJECT (parse, "position query");
4012 gst_query_parse_position (query, &format, NULL);
4014 /* try upstream first */
4015 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4017 /* Fall back on interpreting segment */
4018 GST_OBJECT_LOCK (parse);
4019 if (format == GST_FORMAT_BYTES) {
4020 dest_value = parse->priv->offset;
4022 } else if (format == parse->segment.format &&
4023 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
4024 dest_value = gst_segment_to_stream_time (&parse->segment,
4025 parse->segment.format, parse->segment.position);
4028 GST_OBJECT_UNLOCK (parse);
4030 /* no precise result, upstream no idea either, then best estimate */
4031 /* priv->offset is updated in both PUSH/PULL modes */
4032 res = gst_base_parse_convert (parse,
4033 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
4036 gst_query_set_position (query, format, dest_value);
4040 case GST_QUERY_DURATION:
4043 GstClockTime duration;
4045 GST_DEBUG_OBJECT (parse, "duration query");
4046 gst_query_parse_duration (query, &format, NULL);
4048 /* consult upstream */
4049 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4051 /* otherwise best estimate from us */
4053 res = gst_base_parse_get_duration (parse, format, &duration);
4055 gst_query_set_duration (query, format, duration);
4059 case GST_QUERY_SEEKING:
4062 GstClockTime duration = GST_CLOCK_TIME_NONE;
4063 gboolean seekable = FALSE;
4065 GST_DEBUG_OBJECT (parse, "seeking query");
4066 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4068 /* consult upstream */
4069 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4071 /* we may be able to help if in TIME */
4072 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4073 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4074 /* already OK if upstream takes care */
4075 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4077 if (!(res && seekable)) {
4078 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4079 || duration == -1) {
4080 /* seekable if we still have a chance to get duration later on */
4082 parse->priv->upstream_seekable && parse->priv->update_interval;
4084 seekable = parse->priv->upstream_seekable;
4085 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4088 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4094 case GST_QUERY_FORMATS:
4095 gst_query_set_formatsv (query, 3, fmtlist);
4098 case GST_QUERY_CONVERT:
4100 GstFormat src_format, dest_format;
4101 gint64 src_value, dest_value;
4103 gst_query_parse_convert (query, &src_format, &src_value,
4104 &dest_format, &dest_value);
4106 res = gst_base_parse_convert (parse, src_format, src_value,
4107 dest_format, &dest_value);
4109 gst_query_set_convert (query, src_format, src_value,
4110 dest_format, dest_value);
4114 case GST_QUERY_LATENCY:
4116 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4118 GstClockTime min_latency, max_latency;
4120 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4121 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4122 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4123 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4125 GST_OBJECT_LOCK (parse);
4126 /* add our latency */
4127 min_latency += parse->priv->min_latency;
4128 if (max_latency == -1 || parse->priv->max_latency == -1)
4131 max_latency += parse->priv->max_latency;
4132 GST_OBJECT_UNLOCK (parse);
4134 gst_query_set_latency (query, live, min_latency, max_latency);
4138 case GST_QUERY_SEGMENT:
4143 format = parse->segment.format;
4146 gst_segment_to_stream_time (&parse->segment, format,
4147 parse->segment.start);
4148 if ((stop = parse->segment.stop) == -1)
4149 stop = parse->segment.duration;
4151 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4153 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4158 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4164 /* scans for a cluster start from @pos,
4165 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4166 static GstFlowReturn
4167 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4168 GstClockTime * time, GstClockTime * duration)
4170 GstBaseParseClass *klass;
4172 gboolean orig_drain, orig_discont;
4173 GstFlowReturn ret = GST_FLOW_OK;
4174 GstBuffer *buf = NULL;
4175 GstBaseParseFrame *sframe = NULL;
4177 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4178 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4179 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4181 klass = GST_BASE_PARSE_GET_CLASS (parse);
4183 *time = GST_CLOCK_TIME_NONE;
4184 *duration = GST_CLOCK_TIME_NONE;
4187 orig_offset = parse->priv->offset;
4188 orig_discont = parse->priv->discont;
4189 orig_drain = parse->priv->drain;
4191 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4192 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4194 /* jump elsewhere and locate next frame */
4195 parse->priv->offset = *pos;
4196 /* mark as scanning so frames don't get processed all the way */
4197 parse->priv->scanning = TRUE;
4198 ret = gst_base_parse_scan_frame (parse, klass);
4199 parse->priv->scanning = FALSE;
4200 /* retrieve frame found during scan */
4201 sframe = parse->priv->scanned_frame;
4202 parse->priv->scanned_frame = NULL;
4204 if (ret != GST_FLOW_OK || !sframe)
4207 /* get offset first, subclass parsing might dump other stuff in there */
4208 *pos = sframe->offset;
4209 buf = sframe->buffer;
4212 /* but it should provide proper time */
4213 *time = GST_BUFFER_TIMESTAMP (buf);
4214 *duration = GST_BUFFER_DURATION (buf);
4216 GST_LOG_OBJECT (parse,
4217 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4218 GST_TIME_ARGS (*time), *pos);
4222 gst_base_parse_frame_free (sframe);
4225 parse->priv->offset = orig_offset;
4226 parse->priv->discont = orig_discont;
4227 parse->priv->drain = orig_drain;
4232 /* bisect and scan through file for frame starting before @time,
4233 * returns OK and @time/@offset if found, NONE and/or error otherwise
4234 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4235 static GstFlowReturn
4236 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4239 GstFlowReturn ret = GST_FLOW_OK;
4240 gint64 lpos, hpos, newpos;
4241 GstClockTime time, ltime, htime, newtime, dur;
4242 gboolean cont = TRUE;
4243 const GstClockTime tolerance = TARGET_DIFFERENCE;
4244 const guint chunk = 4 * 1024;
4246 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4247 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4249 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4250 GST_TIME_ARGS (*_time));
4252 /* TODO also make keyframe aware if useful some day */
4267 /* do not know at first */
4269 *_time = GST_CLOCK_TIME_NONE;
4271 /* need initial positions; start and end */
4272 lpos = parse->priv->first_frame_offset;
4273 ltime = parse->priv->first_frame_pts;
4274 /* try other one if no luck */
4275 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4276 ltime = parse->priv->first_frame_dts;
4277 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4278 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4279 return GST_FLOW_ERROR;
4281 hpos = parse->priv->upstream_size;
4283 GST_DEBUG_OBJECT (parse,
4284 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4285 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4286 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4288 /* check preconditions are satisfied;
4289 * start and end are needed, except for special case where we scan for
4290 * last frame to determine duration */
4291 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4292 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4293 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4297 /* shortcut cases */
4300 } else if (time < ltime + tolerance) {
4304 } else if (time >= htime) {
4310 while (htime > ltime && cont) {
4311 GST_LOG_OBJECT (parse,
4312 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4313 GST_TIME_ARGS (ltime));
4314 GST_LOG_OBJECT (parse,
4315 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4316 GST_TIME_ARGS (htime));
4317 if (G_UNLIKELY (time == G_MAXINT64)) {
4319 } else if (G_LIKELY (hpos > lpos)) {
4321 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4324 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4326 /* we check this case once, but not forever, so break loop */
4331 newpos = CLAMP (newpos, lpos, hpos);
4332 GST_LOG_OBJECT (parse,
4333 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4334 GST_TIME_ARGS (time), newpos);
4336 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4337 if (ret == GST_FLOW_EOS) {
4338 /* heuristic HACK */
4339 hpos = MAX (lpos, hpos - chunk);
4341 } else if (ret != GST_FLOW_OK) {
4345 if (newtime == -1 || newpos == -1) {
4346 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4350 if (G_UNLIKELY (time == G_MAXINT64)) {
4353 if (GST_CLOCK_TIME_IS_VALID (dur))
4356 } else if (newtime > time) {
4358 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4360 } else if (newtime + tolerance > time) {
4361 /* close enough undershoot */
4365 } else if (newtime < ltime) {
4366 /* so a position beyond lpos resulted in earlier time than ltime ... */
4367 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4370 /* undershoot too far */
4371 newpos += newpos == lpos ? chunk : 0;
4372 lpos = CLAMP (newpos, lpos, hpos);
4378 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4379 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4384 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4385 gboolean before, GstClockTime * _ts)
4387 gint64 bytes = 0, ts = 0;
4388 GstIndexEntry *entry = NULL;
4390 if (time == GST_CLOCK_TIME_NONE) {
4396 GST_BASE_PARSE_INDEX_LOCK (parse);
4397 if (parse->priv->index) {
4398 /* Let's check if we have an index entry for that time */
4399 entry = gst_index_get_assoc_entry (parse->priv->index,
4400 parse->priv->index_id,
4401 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4402 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4406 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4407 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4409 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4410 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4411 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4413 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4414 GST_TIME_ARGS (time));
4417 ts = GST_CLOCK_TIME_NONE;
4420 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4429 /* returns TRUE if seek succeeded */
4431 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4436 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4437 gboolean flush, update, res = TRUE, accurate;
4438 gint64 start, stop, seekpos, seekstop;
4439 GstSegment seeksegment = { 0, };
4440 GstClockTime start_ts;
4442 GstEvent *segment_event;
4444 /* try upstream first, unless we're driving the streaming thread ourselves */
4445 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4446 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4451 gst_event_parse_seek (event, &rate, &format, &flags,
4452 &start_type, &start, &stop_type, &stop);
4453 seqnum = gst_event_get_seqnum (event);
4455 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4456 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4457 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4458 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4460 /* we can only handle TIME, so check if subclass can convert
4461 * to TIME format if it's some other format (such as DEFAULT) */
4462 if (format != GST_FORMAT_TIME) {
4463 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4464 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4466 goto no_convert_to_time;
4468 GST_INFO_OBJECT (parse, "converted %s format to start time "
4469 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4470 gst_format_get_name (format), GST_TIME_ARGS (start),
4471 GST_TIME_ARGS (stop));
4473 format = GST_FORMAT_TIME;
4476 /* no negative rates in push mode (unless upstream takes care of that, but
4477 * we've already tried upstream and it didn't handle the seek request) */
4478 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4481 if (start_type != GST_SEEK_TYPE_SET ||
4482 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4485 /* get flush flag */
4486 flush = flags & GST_SEEK_FLAG_FLUSH;
4488 /* copy segment, we need this because we still need the old
4489 * segment when we close the current segment. */
4490 gst_segment_copy_into (&parse->segment, &seeksegment);
4492 GST_DEBUG_OBJECT (parse, "configuring seek");
4493 gst_segment_do_seek (&seeksegment, rate, format, flags,
4494 start_type, start, stop_type, stop, &update);
4496 /* accurate seeking implies seek tables are used to obtain position,
4497 * and the requested segment is maintained exactly, not adjusted any way */
4498 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4500 /* maybe we can be accurate for (almost) free */
4501 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4502 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4503 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4508 GstClockTime startpos;
4510 startpos = seeksegment.position;
4514 /* accurate requested, so ... seek a bit before target */
4515 if (startpos < parse->priv->lead_in_ts)
4518 startpos -= parse->priv->lead_in_ts;
4520 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4521 seeksegment.stop = seeksegment.start + seeksegment.duration;
4523 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4524 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4528 start_ts = seeksegment.position;
4532 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4533 seeksegment.stop = seeksegment.start + seeksegment.duration;
4535 if (!gst_base_parse_convert (parse, format, start_ts,
4536 GST_FORMAT_BYTES, &seekpos))
4537 goto convert_failed;
4538 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4539 GST_FORMAT_BYTES, &seekstop))
4540 goto convert_failed;
4543 GST_DEBUG_OBJECT (parse,
4544 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4546 GST_DEBUG_OBJECT (parse,
4547 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4548 seeksegment.stop, seekstop);
4550 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4553 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4556 if (parse->srcpad) {
4557 GstEvent *fevent = gst_event_new_flush_start ();
4558 GST_DEBUG_OBJECT (parse, "sending flush start");
4560 gst_event_set_seqnum (fevent, seqnum);
4562 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4563 /* unlock upstream pull_range */
4564 gst_pad_push_event (parse->sinkpad, fevent);
4567 gst_pad_pause_task (parse->sinkpad);
4570 /* we should now be able to grab the streaming thread because we stopped it
4571 * with the above flush/pause code */
4572 GST_PAD_STREAM_LOCK (parse->sinkpad);
4574 /* save current position */
4575 last_stop = parse->segment.position;
4576 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4579 /* now commit to new position */
4581 /* prepare for streaming again */
4583 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4584 GST_DEBUG_OBJECT (parse, "sending flush stop");
4585 gst_event_set_seqnum (fevent, seqnum);
4586 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4587 gst_pad_push_event (parse->sinkpad, fevent);
4588 gst_base_parse_clear_queues (parse);
4590 /* keep track of our position */
4591 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4592 seeksegment.format, parse->segment.position);
4595 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4597 /* store the newsegment event so it can be sent from the streaming thread. */
4598 /* This will be sent later in _loop() */
4599 segment_event = gst_event_new_segment (&parse->segment);
4600 gst_event_set_seqnum (segment_event, seqnum);
4601 parse->priv->pending_events =
4602 g_list_prepend (parse->priv->pending_events, segment_event);
4604 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4605 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4606 ", time = %" GST_TIME_FORMAT, format,
4607 GST_TIME_ARGS (parse->segment.start),
4608 GST_TIME_ARGS (parse->segment.stop),
4609 GST_TIME_ARGS (parse->segment.time));
4611 /* one last chance in pull mode to stay accurate;
4612 * maybe scan and subclass can find where to go */
4615 GstClockTime ts = seeksegment.position;
4617 gst_base_parse_locate_time (parse, &ts, &scanpos);
4621 /* running collected index now consists of several intervals,
4622 * so optimized check no longer possible */
4623 parse->priv->index_last_valid = FALSE;
4624 parse->priv->index_last_offset = 0;
4625 parse->priv->index_last_ts = 0;
4629 /* mark discont if we are going to stream from another position. */
4630 if (seekpos != parse->priv->offset) {
4631 GST_DEBUG_OBJECT (parse,
4632 "mark DISCONT, we did a seek to another position");
4633 parse->priv->offset = seekpos;
4634 parse->priv->last_offset = seekpos;
4635 parse->priv->seen_keyframe = FALSE;
4636 parse->priv->discont = TRUE;
4637 parse->priv->next_dts = start_ts;
4638 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4639 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4640 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4641 parse->priv->sync_offset = seekpos;
4642 parse->priv->exact_position = accurate;
4645 /* Start streaming thread if paused */
4646 gst_pad_start_task (parse->sinkpad,
4647 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4649 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4654 GstEvent *new_event;
4655 GstBaseParseSeek *seek;
4656 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4658 /* The only thing we need to do in PUSH-mode is to send the
4659 seek event (in bytes) to upstream. Segment / flush handling happens
4660 in corresponding src event handlers */
4661 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4662 if (seekstop >= 0 && seekstop <= seekpos)
4664 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4665 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4666 gst_event_set_seqnum (new_event, seqnum);
4668 /* store segment info so its precise details can be reconstructed when
4669 * receiving newsegment;
4670 * this matters for all details when accurate seeking,
4671 * is most useful to preserve NONE stop time otherwise */
4672 seek = g_new0 (GstBaseParseSeek, 1);
4673 seek->segment = seeksegment;
4674 seek->accurate = accurate;
4675 seek->offset = seekpos;
4676 seek->start_ts = start_ts;
4677 GST_OBJECT_LOCK (parse);
4678 /* less optimal, but preserves order */
4679 parse->priv->pending_seeks =
4680 g_slist_append (parse->priv->pending_seeks, seek);
4681 GST_OBJECT_UNLOCK (parse);
4683 res = gst_pad_push_event (parse->sinkpad, new_event);
4686 GST_OBJECT_LOCK (parse);
4687 parse->priv->pending_seeks =
4688 g_slist_remove (parse->priv->pending_seeks, seek);
4689 GST_OBJECT_UNLOCK (parse);
4695 gst_event_unref (event);
4701 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4707 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4713 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4714 "couldn't convert that into TIME format", gst_format_get_name (format));
4720 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4727 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4729 if (taglist == parse->priv->upstream_tags)
4732 if (parse->priv->upstream_tags) {
4733 gst_tag_list_unref (parse->priv->upstream_tags);
4734 parse->priv->upstream_tags = NULL;
4737 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4739 if (taglist != NULL)
4740 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4742 gst_base_parse_check_bitrate_tags (parse);
4747 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4749 GstBaseParse *parse = GST_BASE_PARSE (element);
4751 GST_BASE_PARSE_INDEX_LOCK (parse);
4752 if (parse->priv->index)
4753 gst_object_unref (parse->priv->index);
4755 parse->priv->index = gst_object_ref (index);
4756 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4757 &parse->priv->index_id);
4758 parse->priv->own_index = FALSE;
4760 parse->priv->index = NULL;
4762 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4766 gst_base_parse_get_index (GstElement * element)
4768 GstBaseParse *parse = GST_BASE_PARSE (element);
4769 GstIndex *result = NULL;
4771 GST_BASE_PARSE_INDEX_LOCK (parse);
4772 if (parse->priv->index)
4773 result = gst_object_ref (parse->priv->index);
4774 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4780 static GstStateChangeReturn
4781 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4783 GstBaseParse *parse;
4784 GstStateChangeReturn result;
4786 parse = GST_BASE_PARSE (element);
4788 switch (transition) {
4789 case GST_STATE_CHANGE_READY_TO_PAUSED:
4790 /* If this is our own index destroy it as the
4791 * old entries might be wrong for the new stream */
4792 GST_BASE_PARSE_INDEX_LOCK (parse);
4793 if (parse->priv->own_index) {
4794 gst_object_unref (parse->priv->index);
4795 parse->priv->index = NULL;
4796 parse->priv->own_index = FALSE;
4799 /* If no index was created, generate one */
4800 if (G_UNLIKELY (!parse->priv->index)) {
4801 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4803 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4804 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4805 &parse->priv->index_id);
4806 parse->priv->own_index = TRUE;
4808 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4814 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4816 switch (transition) {
4817 case GST_STATE_CHANGE_PAUSED_TO_READY:
4818 gst_base_parse_reset (parse);
4828 * gst_base_parse_set_ts_at_offset:
4829 * @parse: a #GstBaseParse
4830 * @offset: offset into current buffer
4832 * This function should only be called from a @handle_frame implementation.
4834 * #GstBaseParse creates initial timestamps for frames by using the last
4835 * timestamp seen in the stream before the frame starts. In certain
4836 * cases, the correct timestamps will occur in the stream after the
4837 * start of the frame, but before the start of the actual picture data.
4838 * This function can be used to set the timestamps based on the offset
4839 * into the frame data that the picture starts.
4844 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4846 GstClockTime pts, dts;
4848 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4850 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4851 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4853 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4854 GST_DEBUG_OBJECT (parse,
4855 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4856 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4858 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4859 parse->priv->prev_pts = parse->priv->next_pts = pts;
4861 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
4862 parse->priv->prev_dts = parse->priv->next_dts = dts;
4863 parse->priv->prev_dts_from_pts = FALSE;
4868 * gst_base_parse_merge_tags:
4869 * @parse: a #GstBaseParse
4870 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4871 * previously-set tags
4872 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4874 * Sets the parser subclass's tags and how they should be merged with any
4875 * upstream stream tags. This will override any tags previously-set
4876 * with gst_base_parse_merge_tags().
4878 * Note that this is provided for convenience, and the subclass is
4879 * not required to use this and can still do tag handling on its own.
4884 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4885 GstTagMergeMode mode)
4887 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4888 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4889 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4891 GST_OBJECT_LOCK (parse);
4893 if (tags != parse->priv->parser_tags) {
4894 if (parse->priv->parser_tags) {
4895 gst_tag_list_unref (parse->priv->parser_tags);
4896 parse->priv->parser_tags = NULL;
4897 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4900 parse->priv->parser_tags = gst_tag_list_ref (tags);
4901 parse->priv->parser_tags_merge_mode = mode;
4904 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4905 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4907 gst_base_parse_check_bitrate_tags (parse);
4908 parse->priv->tags_changed = TRUE;
4911 GST_OBJECT_UNLOCK (parse);