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 gint64 gst_base_parse_find_offset (GstBaseParse * parse,
483 GstClockTime time, gboolean before, GstClockTime * _ts);
484 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
485 GstClockTime * _time, gint64 * _offset);
487 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
488 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
490 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
492 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
494 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
496 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
499 gst_base_parse_clear_queues (GstBaseParse * parse)
501 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
502 g_slist_free (parse->priv->buffers_queued);
503 parse->priv->buffers_queued = NULL;
504 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
506 g_slist_free (parse->priv->buffers_pending);
507 parse->priv->buffers_pending = NULL;
508 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
509 g_slist_free (parse->priv->buffers_head);
510 parse->priv->buffers_head = NULL;
511 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
512 g_slist_free (parse->priv->buffers_send);
513 parse->priv->buffers_send = NULL;
515 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
516 g_list_free (parse->priv->detect_buffers);
517 parse->priv->detect_buffers = NULL;
518 parse->priv->detect_buffers_size = 0;
520 g_queue_foreach (&parse->priv->queued_frames,
521 (GFunc) gst_base_parse_frame_free, NULL);
522 g_queue_clear (&parse->priv->queued_frames);
524 gst_buffer_replace (&parse->priv->cache, NULL);
526 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
527 g_list_free (parse->priv->pending_events);
528 parse->priv->pending_events = NULL;
530 parse->priv->checked_media = FALSE;
534 gst_base_parse_finalize (GObject * object)
536 GstBaseParse *parse = GST_BASE_PARSE (object);
538 g_object_unref (parse->priv->adapter);
540 if (parse->priv->index) {
541 gst_object_unref (parse->priv->index);
542 parse->priv->index = NULL;
544 g_mutex_clear (&parse->priv->index_lock);
546 gst_base_parse_clear_queues (parse);
548 G_OBJECT_CLASS (parent_class)->finalize (object);
552 gst_base_parse_class_init (GstBaseParseClass * klass)
554 GObjectClass *gobject_class;
555 GstElementClass *gstelement_class;
557 gobject_class = G_OBJECT_CLASS (klass);
558 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
559 parent_class = g_type_class_peek_parent (klass);
561 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
562 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
563 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
566 * GstBaseParse:disable-passthrough:
568 * If set to %TRUE, baseparse will unconditionally force parsing of the
569 * incoming data. This can be required in the rare cases where the incoming
570 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
571 * force validation and parsing of the incoming data.
572 * If set to %FALSE, decision of whether to parse the data or not is up to
573 * the implementation (standard behaviour).
575 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
576 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
577 "Force processing (disables passthrough)",
578 DEFAULT_DISABLE_PASSTHROUGH,
579 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
581 gstelement_class = (GstElementClass *) klass;
582 gstelement_class->change_state =
583 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
586 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
587 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
590 /* Default handlers */
591 klass->sink_event = gst_base_parse_sink_event_default;
592 klass->src_event = gst_base_parse_src_event_default;
593 klass->sink_query = gst_base_parse_sink_query_default;
594 klass->src_query = gst_base_parse_src_query_default;
595 klass->convert = gst_base_parse_convert_default;
597 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
598 "baseparse element");
602 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
604 GstPadTemplate *pad_template;
606 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
608 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
611 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
612 g_return_if_fail (pad_template != NULL);
613 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
614 gst_pad_set_event_function (parse->sinkpad,
615 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
616 gst_pad_set_query_function (parse->sinkpad,
617 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
618 gst_pad_set_chain_function (parse->sinkpad,
619 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
620 gst_pad_set_activate_function (parse->sinkpad,
621 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
622 gst_pad_set_activatemode_function (parse->sinkpad,
623 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
624 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
625 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
627 GST_DEBUG_OBJECT (parse, "sinkpad created");
630 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
631 g_return_if_fail (pad_template != NULL);
632 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
633 gst_pad_set_event_function (parse->srcpad,
634 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
635 gst_pad_set_query_function (parse->srcpad,
636 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
637 gst_pad_use_fixed_caps (parse->srcpad);
638 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
639 GST_DEBUG_OBJECT (parse, "src created");
641 g_queue_init (&parse->priv->queued_frames);
643 parse->priv->adapter = gst_adapter_new ();
645 parse->priv->pad_mode = GST_PAD_MODE_NONE;
647 g_mutex_init (&parse->priv->index_lock);
650 gst_base_parse_reset (parse);
651 GST_DEBUG_OBJECT (parse, "init ok");
653 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
655 parse->priv->upstream_tags = NULL;
656 parse->priv->parser_tags = NULL;
657 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
661 gst_base_parse_set_property (GObject * object, guint prop_id,
662 const GValue * value, GParamSpec * pspec)
664 GstBaseParse *parse = GST_BASE_PARSE (object);
667 case PROP_DISABLE_PASSTHROUGH:
668 parse->priv->disable_passthrough = g_value_get_boolean (value);
671 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
677 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
680 GstBaseParse *parse = GST_BASE_PARSE (object);
683 case PROP_DISABLE_PASSTHROUGH:
684 g_value_set_boolean (value, parse->priv->disable_passthrough);
687 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
692 static GstBaseParseFrame *
693 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
695 GstBaseParseFrame *copy;
697 copy = g_slice_dup (GstBaseParseFrame, frame);
698 copy->buffer = gst_buffer_ref (frame->buffer);
699 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
701 GST_TRACE ("copied frame %p -> %p", frame, copy);
707 gst_base_parse_frame_free (GstBaseParseFrame * frame)
709 GST_TRACE ("freeing frame %p", frame);
712 gst_buffer_unref (frame->buffer);
713 frame->buffer = NULL;
716 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
717 g_slice_free (GstBaseParseFrame, frame);
719 memset (frame, 0, sizeof (*frame));
723 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
724 (GBoxedCopyFunc) gst_base_parse_frame_copy,
725 (GBoxedFreeFunc) gst_base_parse_frame_free);
728 * gst_base_parse_frame_init:
729 * @frame: #GstBaseParseFrame.
731 * Sets a #GstBaseParseFrame to initial state. Currently this means
732 * all public fields are zero-ed and a private flag is set to make
733 * sure gst_base_parse_frame_free() only frees the contents but not
734 * the actual frame. Use this function to initialise a #GstBaseParseFrame
735 * allocated on the stack.
738 gst_base_parse_frame_init (GstBaseParseFrame * frame)
740 memset (frame, 0, sizeof (GstBaseParseFrame));
741 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
742 GST_TRACE ("inited frame %p", frame);
746 * gst_base_parse_frame_new:
747 * @buffer: (transfer none): a #GstBuffer
749 * @overhead: number of bytes in this frame which should be counted as
750 * metadata overhead, ie. not used to calculate the average bitrate.
751 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
753 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
754 * elements written in C should usually allocate the frame on the stack and
755 * then use gst_base_parse_frame_init() to initialise it.
757 * Returns: a newly-allocated #GstBaseParseFrame. Free with
758 * gst_base_parse_frame_free() when no longer needed.
761 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
764 GstBaseParseFrame *frame;
766 frame = g_slice_new0 (GstBaseParseFrame);
767 frame->buffer = gst_buffer_ref (buffer);
769 GST_TRACE ("created frame %p", frame);
774 gst_base_parse_update_flags (GstBaseParse * parse)
778 /* set flags one by one for clarity */
779 if (G_UNLIKELY (parse->priv->drain))
780 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
782 /* losing sync is pretty much a discont (and vice versa), no ? */
783 if (G_UNLIKELY (parse->priv->discont))
784 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
788 gst_base_parse_update_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
790 if (G_UNLIKELY (parse->priv->discont)) {
791 GST_DEBUG_OBJECT (parse, "marking DISCONT");
792 GST_BUFFER_FLAG_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
794 GST_BUFFER_FLAG_UNSET (frame->buffer, GST_BUFFER_FLAG_DISCONT);
797 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
798 GST_LOG_OBJECT (parse, "marking as new frame");
799 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
802 frame->offset = parse->priv->prev_offset = parse->priv->offset;
806 gst_base_parse_reset (GstBaseParse * parse)
808 GST_OBJECT_LOCK (parse);
809 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
810 parse->priv->duration = -1;
811 parse->priv->min_frame_size = 1;
812 parse->priv->discont = TRUE;
813 parse->priv->flushing = FALSE;
814 parse->priv->saw_gaps = FALSE;
815 parse->priv->offset = 0;
816 parse->priv->sync_offset = 0;
817 parse->priv->update_interval = -1;
818 parse->priv->fps_num = parse->priv->fps_den = 0;
819 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
820 parse->priv->lead_in = parse->priv->lead_out = 0;
821 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
822 parse->priv->bitrate = 0;
823 parse->priv->framecount = 0;
824 parse->priv->bytecount = 0;
825 parse->priv->acc_duration = 0;
826 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
827 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
828 parse->priv->first_frame_offset = -1;
829 parse->priv->estimated_duration = -1;
830 parse->priv->estimated_drift = 0;
831 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
832 parse->priv->next_dts = 0;
833 parse->priv->syncable = TRUE;
834 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
835 parse->priv->passthrough = FALSE;
836 parse->priv->pts_interpolate = TRUE;
837 parse->priv->infer_ts = TRUE;
838 parse->priv->has_timing_info = FALSE;
839 parse->priv->min_bitrate = G_MAXUINT;
840 parse->priv->max_bitrate = 0;
841 parse->priv->avg_bitrate = 0;
842 parse->priv->posted_avg_bitrate = 0;
844 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
845 parse->priv->index_last_offset = -1;
846 parse->priv->index_last_valid = TRUE;
847 parse->priv->upstream_seekable = FALSE;
848 parse->priv->upstream_size = 0;
849 parse->priv->upstream_has_duration = FALSE;
850 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
851 parse->priv->idx_interval = 0;
852 parse->priv->idx_byte_interval = 0;
853 parse->priv->exact_position = TRUE;
854 parse->priv->seen_keyframe = FALSE;
855 parse->priv->checked_media = FALSE;
857 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
858 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
859 parse->priv->last_offset = 0;
861 parse->priv->skip = 0;
863 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
865 g_list_free (parse->priv->pending_events);
866 parse->priv->pending_events = NULL;
868 if (parse->priv->cache) {
869 gst_buffer_unref (parse->priv->cache);
870 parse->priv->cache = NULL;
873 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
874 g_slist_free (parse->priv->pending_seeks);
875 parse->priv->pending_seeks = NULL;
877 if (parse->priv->adapter)
878 gst_adapter_clear (parse->priv->adapter);
880 gst_base_parse_set_upstream_tags (parse, NULL);
882 if (parse->priv->parser_tags) {
883 gst_tag_list_unref (parse->priv->parser_tags);
884 parse->priv->parser_tags = NULL;
886 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
888 parse->priv->new_frame = TRUE;
890 parse->priv->first_buffer = TRUE;
892 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
893 g_list_free (parse->priv->detect_buffers);
894 parse->priv->detect_buffers = NULL;
895 parse->priv->detect_buffers_size = 0;
896 GST_OBJECT_UNLOCK (parse);
900 gst_base_parse_check_bitrate_tag (GstBaseParse * parse, const gchar * tag)
902 gboolean got_tag = FALSE;
905 if (parse->priv->upstream_tags != NULL)
906 got_tag = gst_tag_list_get_uint (parse->priv->upstream_tags, tag, &n);
908 if (!got_tag && parse->priv->parser_tags != NULL)
909 got_tag = gst_tag_list_get_uint (parse->priv->parser_tags, tag, &n);
914 /* check if upstream or subclass tags contain bitrates already */
916 gst_base_parse_check_bitrate_tags (GstBaseParse * parse)
918 parse->priv->post_min_bitrate =
919 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MINIMUM_BITRATE);
920 parse->priv->post_avg_bitrate =
921 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_BITRATE);
922 parse->priv->post_max_bitrate =
923 !gst_base_parse_check_bitrate_tag (parse, GST_TAG_MAXIMUM_BITRATE);
926 /* Queues new tag event with the current combined state of the stream tags
927 * (i.e. upstream tags merged with subclass tags and current baseparse tags) */
929 gst_base_parse_queue_tag_event_update (GstBaseParse * parse)
931 GstTagList *merged_tags;
933 GST_LOG_OBJECT (parse, "upstream : %" GST_PTR_FORMAT,
934 parse->priv->upstream_tags);
935 GST_LOG_OBJECT (parse, "parser : %" GST_PTR_FORMAT,
936 parse->priv->parser_tags);
937 GST_LOG_OBJECT (parse, "mode : %d", parse->priv->parser_tags_merge_mode);
940 gst_tag_list_merge (parse->priv->upstream_tags, parse->priv->parser_tags,
941 parse->priv->parser_tags_merge_mode);
943 GST_DEBUG_OBJECT (parse, "merged : %" GST_PTR_FORMAT, merged_tags);
945 if (merged_tags == NULL)
948 if (gst_tag_list_is_empty (merged_tags)) {
949 gst_tag_list_unref (merged_tags);
953 if (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE) {
954 /* only add bitrate tags to non-empty taglists for now, and only if neither
955 * upstream tags nor the subclass sets the bitrate tag in question already */
956 if (parse->priv->min_bitrate != G_MAXUINT && parse->priv->post_min_bitrate) {
957 GST_LOG_OBJECT (parse, "adding min bitrate %u", parse->priv->min_bitrate);
958 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
959 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
961 if (parse->priv->max_bitrate != 0 && parse->priv->post_max_bitrate) {
962 GST_LOG_OBJECT (parse, "adding max bitrate %u", parse->priv->max_bitrate);
963 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
964 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
966 if (parse->priv->avg_bitrate != 0 && parse->priv->post_avg_bitrate) {
967 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
968 GST_LOG_OBJECT (parse, "adding avg bitrate %u", parse->priv->avg_bitrate);
969 gst_tag_list_add (merged_tags, GST_TAG_MERGE_KEEP,
970 GST_TAG_BITRATE, 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))) {
1409 GstEvent *caps_event = gst_event_new_caps (default_caps);
1411 GST_DEBUG_OBJECT (parse,
1412 "Store caps event to pending list for initial pre-rolling");
1414 /* Events are in decreasing order. Go down the list until we
1415 * find the first pre-CAPS event and insert our CAPS event there.
1417 * There should be a SEGMENT event already, which is > CAPS */
1418 for (l = parse->priv->pending_events; l; l = l->next) {
1419 GstEvent *e = l->data;
1421 if (GST_EVENT_TYPE (e) < GST_EVENT_CAPS) {
1422 parse->priv->pending_events =
1423 g_list_insert_before (parse->priv->pending_events, l,
1428 /* No pending event that is < CAPS, so we have to add it at the very
1429 * end of the list */
1431 parse->priv->pending_events =
1432 g_list_append (parse->priv->pending_events, caps_event);
1434 gst_caps_unref (default_caps);
1436 gst_event_unref (event);
1439 GST_ELEMENT_ERROR (parse, STREAM, FORMAT, (NULL),
1440 ("Parser output not negotiated before GAP event."));
1445 gst_base_parse_push_pending_events (parse);
1447 if (parse->segment.rate > 0.0)
1448 gst_base_parse_drain (parse);
1450 gst_base_parse_finish_fragment (parse, TRUE);
1451 forward_immediate = TRUE;
1452 parse->priv->saw_gaps = TRUE;
1457 GstTagList *tags = NULL;
1459 gst_event_parse_tag (event, &tags);
1461 /* We only care about stream tags here, global tags we just forward */
1462 if (gst_tag_list_get_scope (tags) != GST_TAG_SCOPE_STREAM)
1465 gst_base_parse_set_upstream_tags (parse, tags);
1466 gst_base_parse_queue_tag_event_update (parse);
1467 parse->priv->tags_changed = FALSE;
1468 gst_event_unref (event);
1473 case GST_EVENT_STREAM_START:
1475 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1476 forward_immediate = TRUE;
1478 gst_base_parse_set_upstream_tags (parse, NULL);
1479 parse->priv->tags_changed = TRUE;
1486 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1487 * For EOS this is required because no buffer or serialized event
1488 * will come after EOS and nothing could trigger another
1489 * _finish_frame() call. *
1490 * If the subclass handles sending of EOS manually it can return
1491 * _DROPPED from ::finish() and all other subclasses should have
1492 * decoded/flushed all remaining data before this
1494 * For FLUSH_STOP this is required because it is expected
1495 * to be forwarded immediately and no buffers are queued anyway.
1498 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1499 ret = gst_pad_push_event (parse->srcpad, event);
1501 parse->priv->pending_events =
1502 g_list_prepend (parse->priv->pending_events, event);
1507 GST_DEBUG_OBJECT (parse, "event handled");
1513 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1518 pad = GST_BASE_PARSE_SINK_PAD (parse);
1520 switch (GST_QUERY_TYPE (query)) {
1521 case GST_QUERY_CAPS:
1523 GstBaseParseClass *bclass;
1525 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1527 if (bclass->get_sink_caps) {
1528 GstCaps *caps, *filter;
1530 gst_query_parse_caps (query, &filter);
1531 caps = bclass->get_sink_caps (parse, filter);
1532 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1534 gst_query_set_caps_result (query, caps);
1535 gst_caps_unref (caps);
1539 GstCaps *caps, *template_caps, *filter;
1541 gst_query_parse_caps (query, &filter);
1542 template_caps = gst_pad_get_pad_template_caps (pad);
1543 if (filter != NULL) {
1545 gst_caps_intersect_full (filter, template_caps,
1546 GST_CAPS_INTERSECT_FIRST);
1547 gst_caps_unref (template_caps);
1549 caps = template_caps;
1551 gst_query_set_caps_result (query, caps);
1552 gst_caps_unref (caps);
1560 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1569 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1571 GstBaseParseClass *bclass;
1572 GstBaseParse *parse;
1575 parse = GST_BASE_PARSE (parent);
1576 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1578 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1580 if (bclass->sink_query)
1581 ret = bclass->sink_query (parse, query);
1585 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1586 GST_QUERY_TYPE_NAME (query), ret, query);
1592 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1594 GstBaseParseClass *bclass;
1595 GstBaseParse *parse;
1598 parse = GST_BASE_PARSE (parent);
1599 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1601 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1602 GST_QUERY_TYPE_NAME (query), query);
1604 if (bclass->src_query)
1605 ret = bclass->src_query (parse, query);
1609 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1610 GST_QUERY_TYPE_NAME (query), ret, query);
1615 /* gst_base_parse_src_event:
1616 * @pad: #GstPad that received the event.
1617 * @event: #GstEvent that was received.
1619 * Handler for source pad events.
1621 * Returns: %TRUE if the event was handled.
1624 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1626 GstBaseParse *parse;
1627 GstBaseParseClass *bclass;
1628 gboolean ret = TRUE;
1630 parse = GST_BASE_PARSE (parent);
1631 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1633 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1634 GST_EVENT_TYPE_NAME (event));
1636 if (bclass->src_event)
1637 ret = bclass->src_event (parse, event);
1639 gst_event_unref (event);
1645 gst_base_parse_is_seekable (GstBaseParse * parse)
1647 /* FIXME: could do more here, e.g. check index or just send data from 0
1648 * in pull mode and let decoder/sink clip */
1649 return parse->priv->syncable;
1652 /* gst_base_parse_src_event_default:
1653 * @parse: #GstBaseParse.
1654 * @event: #GstEvent that was received.
1656 * Default srcpad event handler.
1658 * Returns: %TRUE if the event was handled and can be dropped.
1661 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1663 gboolean res = FALSE;
1665 switch (GST_EVENT_TYPE (event)) {
1666 case GST_EVENT_SEEK:
1667 if (gst_base_parse_is_seekable (parse))
1668 res = gst_base_parse_handle_seek (parse, event);
1671 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1680 * gst_base_parse_convert_default:
1681 * @parse: #GstBaseParse.
1682 * @src_format: #GstFormat describing the source format.
1683 * @src_value: Source value to be converted.
1684 * @dest_format: #GstFormat defining the converted format.
1685 * @dest_value: Pointer where the conversion result will be put.
1687 * Default implementation of "convert" vmethod in #GstBaseParse class.
1689 * Returns: %TRUE if conversion was successful.
1692 gst_base_parse_convert_default (GstBaseParse * parse,
1693 GstFormat src_format,
1694 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1696 gboolean ret = FALSE;
1697 guint64 bytes, duration;
1699 if (G_UNLIKELY (src_format == dest_format)) {
1700 *dest_value = src_value;
1704 if (G_UNLIKELY (src_value == -1)) {
1709 if (G_UNLIKELY (src_value == 0)) {
1714 if (parse->priv->upstream_format != GST_FORMAT_BYTES) {
1715 /* don't do byte format conversions if we're not really parsing
1716 * a raw elementary stream, since we don't really have BYTES
1717 * position / duration info */
1718 if (src_format == GST_FORMAT_BYTES || dest_format == GST_FORMAT_BYTES)
1719 goto no_slaved_conversions;
1722 /* need at least some frames */
1723 if (!parse->priv->framecount)
1726 duration = parse->priv->acc_duration / GST_MSECOND;
1727 bytes = parse->priv->bytecount;
1729 if (G_UNLIKELY (!duration || !bytes))
1730 goto no_duration_bytes;
1732 if (src_format == GST_FORMAT_BYTES) {
1733 if (dest_format == GST_FORMAT_TIME) {
1734 /* BYTES -> TIME conversion */
1735 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1736 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1737 *dest_value *= GST_MSECOND;
1738 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1739 *dest_value / GST_MSECOND);
1742 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1744 } else if (src_format == GST_FORMAT_TIME) {
1745 if (dest_format == GST_FORMAT_BYTES) {
1746 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1747 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1749 GST_DEBUG_OBJECT (parse,
1750 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1751 src_value / GST_MSECOND, *dest_value);
1754 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1756 } else if (src_format == GST_FORMAT_DEFAULT) {
1757 /* DEFAULT == frame-based */
1758 if (dest_format == GST_FORMAT_TIME) {
1759 GST_DEBUG_OBJECT (parse, "converting default -> time");
1760 if (parse->priv->fps_den) {
1761 *dest_value = gst_util_uint64_scale (src_value,
1762 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1766 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1769 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1776 GST_DEBUG_OBJECT (parse, "no framecount");
1781 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1782 G_GUINT64_FORMAT, duration, bytes);
1785 no_slaved_conversions:
1787 GST_DEBUG_OBJECT (parse,
1788 "Can't do format conversions when upstream format is not BYTES");
1794 gst_base_parse_update_duration (GstBaseParse * parse)
1796 gint64 ptot, dest_value;
1798 if (!gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &ptot))
1801 if (!gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1802 GST_FORMAT_TIME, &dest_value))
1805 /* inform if duration changed, but try to avoid spamming */
1806 parse->priv->estimated_drift += dest_value - parse->priv->estimated_duration;
1808 parse->priv->estimated_duration = dest_value;
1809 GST_LOG_OBJECT (parse,
1810 "updated estimated duration to %" GST_TIME_FORMAT,
1811 GST_TIME_ARGS (dest_value));
1813 if (parse->priv->estimated_drift > GST_SECOND ||
1814 parse->priv->estimated_drift < -GST_SECOND) {
1815 gst_element_post_message (GST_ELEMENT (parse),
1816 gst_message_new_duration_changed (GST_OBJECT (parse)));
1817 parse->priv->estimated_drift = 0;
1821 /* gst_base_parse_update_bitrates:
1822 * @parse: #GstBaseParse.
1823 * @buffer: Current frame as a #GstBuffer
1825 * Keeps track of the minimum and maximum bitrates, and also maintains a
1826 * running average bitrate of the stream so far.
1829 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1831 guint64 data_len, frame_dur;
1832 gint overhead, frame_bitrate;
1833 GstBuffer *buffer = frame->buffer;
1835 overhead = frame->overhead;
1839 data_len = gst_buffer_get_size (buffer) - overhead;
1840 parse->priv->data_bytecount += data_len;
1842 /* duration should be valid by now,
1843 * either set by subclass or maybe based on fps settings */
1844 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1845 /* Calculate duration of a frame from buffer properties */
1846 frame_dur = GST_BUFFER_DURATION (buffer);
1847 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1848 parse->priv->acc_duration;
1851 /* No way to figure out frame duration (is this even possible?) */
1855 /* override if subclass provided bitrate, e.g. metadata based */
1856 if (parse->priv->bitrate) {
1857 parse->priv->avg_bitrate = parse->priv->bitrate;
1858 /* spread this (confirmed) info ASAP */
1859 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1860 parse->priv->tags_changed = TRUE;
1864 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1868 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1869 parse->priv->avg_bitrate);
1871 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
1874 if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE &&
1875 (parse->priv->post_min_bitrate || parse->priv->post_avg_bitrate
1876 || parse->priv->post_max_bitrate))
1877 parse->priv->tags_changed = TRUE;
1879 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1880 if (frame_bitrate < parse->priv->min_bitrate) {
1881 parse->priv->min_bitrate = frame_bitrate;
1882 if (parse->priv->post_min_bitrate)
1883 parse->priv->tags_changed = TRUE;
1886 if (frame_bitrate > parse->priv->max_bitrate) {
1887 parse->priv->max_bitrate = frame_bitrate;
1888 if (parse->priv->post_max_bitrate)
1889 parse->priv->tags_changed = TRUE;
1892 /* Only update the tag on a 2% change */
1893 if (parse->priv->post_avg_bitrate && parse->priv->avg_bitrate) {
1894 guint64 diffprev = gst_util_uint64_scale_int (100,
1895 ABSDIFF (parse->priv->avg_bitrate, parse->priv->posted_avg_bitrate),
1896 parse->priv->avg_bitrate);
1897 if (diffprev >= UPDATE_THRESHOLD)
1898 parse->priv->tags_changed = TRUE;
1904 * gst_base_parse_add_index_entry:
1905 * @parse: #GstBaseParse.
1906 * @offset: offset of entry
1907 * @ts: timestamp associated with offset
1908 * @key: whether entry refers to keyframe
1909 * @force: add entry disregarding sanity checks
1911 * Adds an entry to the index associating @offset to @ts. It is recommended
1912 * to only add keyframe entries. @force allows to bypass checks, such as
1913 * whether the stream is (upstream) seekable, another entry is already "close"
1914 * to the new entry, etc.
1916 * Returns: #gboolean indicating whether entry was added
1919 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1920 GstClockTime ts, gboolean key, gboolean force)
1922 gboolean ret = FALSE;
1923 GstIndexAssociation associations[2];
1925 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1926 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1928 if (G_LIKELY (!force)) {
1930 if (!parse->priv->upstream_seekable) {
1931 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1935 /* FIXME need better helper data structure that handles these issues
1936 * related to ongoing collecting of index entries */
1937 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1939 GST_LOG_OBJECT (parse,
1940 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1941 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1945 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1946 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1947 parse->priv->idx_interval) {
1948 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1949 GST_TIME_ARGS (parse->priv->index_last_ts));
1953 /* if last is not really the last one */
1954 if (!parse->priv->index_last_valid) {
1955 GstClockTime prev_ts;
1957 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1958 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1959 GST_LOG_OBJECT (parse,
1960 "entry too close to existing entry %" GST_TIME_FORMAT,
1961 GST_TIME_ARGS (prev_ts));
1962 parse->priv->index_last_offset = offset;
1963 parse->priv->index_last_ts = ts;
1969 associations[0].format = GST_FORMAT_TIME;
1970 associations[0].value = ts;
1971 associations[1].format = GST_FORMAT_BYTES;
1972 associations[1].value = offset;
1974 /* index might change on-the-fly, although that would be nutty app ... */
1975 GST_BASE_PARSE_INDEX_LOCK (parse);
1976 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1977 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1978 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1979 (const GstIndexAssociation *) &associations);
1980 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1983 parse->priv->index_last_offset = offset;
1984 parse->priv->index_last_ts = ts;
1993 /* check for seekable upstream, above and beyond a mere query */
1995 gst_base_parse_check_seekability (GstBaseParse * parse)
1998 gboolean seekable = FALSE;
1999 gint64 start = -1, stop = -1;
2000 guint idx_interval = 0;
2001 guint64 idx_byte_interval = 0;
2003 query = gst_query_new_seeking (GST_FORMAT_BYTES);
2004 if (!gst_pad_peer_query (parse->sinkpad, query)) {
2005 GST_DEBUG_OBJECT (parse, "seeking query failed");
2009 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
2011 /* try harder to query upstream size if we didn't get it the first time */
2012 if (seekable && stop == -1) {
2013 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
2014 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
2017 /* if upstream doesn't know the size, it's likely that it's not seekable in
2018 * practice even if it technically may be seekable */
2019 if (seekable && (start != 0 || stop <= start)) {
2020 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
2024 /* let's not put every single frame into our index */
2026 if (stop < 10 * 1024 * 1024)
2028 else if (stop < 100 * 1024 * 1024)
2031 idx_interval = 1000;
2033 /* ensure that even for large files (e.g. very long audio files), the index
2034 * stays reasonably-size, with some arbitrary limit to the total number of
2036 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
2037 GST_DEBUG_OBJECT (parse,
2038 "Limiting index entries to %d, indexing byte interval %"
2039 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
2043 gst_query_unref (query);
2045 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
2046 G_GUINT64_FORMAT ")", seekable, start, stop);
2047 parse->priv->upstream_seekable = seekable;
2048 parse->priv->upstream_size = seekable ? stop : 0;
2050 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
2051 parse->priv->idx_interval = idx_interval * GST_MSECOND;
2052 parse->priv->idx_byte_interval = idx_byte_interval;
2055 /* some misc checks on upstream */
2057 gst_base_parse_check_upstream (GstBaseParse * parse)
2061 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
2062 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
2063 /* upstream has one, accept it also, and no further updates */
2064 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
2065 parse->priv->upstream_has_duration = TRUE;
2068 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
2069 parse->priv->upstream_has_duration);
2072 /* checks src caps to determine if dealing with audio or video */
2073 /* TODO maybe forego automagic stuff and let subclass configure it ? */
2075 gst_base_parse_check_media (GstBaseParse * parse)
2080 caps = gst_pad_get_current_caps (parse->srcpad);
2081 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
2082 parse->priv->is_video =
2083 g_str_has_prefix (gst_structure_get_name (s), "video");
2085 /* historical default */
2086 parse->priv->is_video = FALSE;
2089 gst_caps_unref (caps);
2091 parse->priv->checked_media = TRUE;
2092 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
2095 /* takes ownership of frame */
2097 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2099 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
2100 /* frame allocated on the heap, we can just take ownership */
2101 g_queue_push_tail (&parse->priv->queued_frames, frame);
2102 GST_TRACE ("queued frame %p", frame);
2104 GstBaseParseFrame *copy;
2106 /* probably allocated on the stack, must make a proper copy */
2107 copy = gst_base_parse_frame_copy (frame);
2108 g_queue_push_tail (&parse->priv->queued_frames, copy);
2109 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
2110 gst_base_parse_frame_free (frame);
2114 /* makes sure that @buf is properly prepared and decorated for passing
2115 * to baseclass, and an equally setup frame is returned setup with @buf.
2116 * Takes ownership of @buf. */
2117 static GstBaseParseFrame *
2118 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
2120 GstBaseParseFrame *frame = NULL;
2122 buffer = gst_buffer_make_writable (buffer);
2124 GST_LOG_OBJECT (parse,
2125 "preparing frame at offset %" G_GUINT64_FORMAT
2126 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
2127 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
2128 gst_buffer_get_size (buffer));
2130 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
2132 gst_base_parse_update_flags (parse);
2134 frame = gst_base_parse_frame_new (buffer, 0, 0);
2135 gst_buffer_unref (buffer);
2136 gst_base_parse_update_frame (parse, frame);
2138 /* clear flags for next frame */
2139 parse->priv->discont = FALSE;
2140 parse->priv->new_frame = FALSE;
2142 /* use default handler to provide initial (upstream) metadata */
2143 gst_base_parse_parse_frame (parse, frame);
2148 /* Wraps buffer in a frame and dispatches to subclass.
2149 * Also manages data skipping and offset handling (including adapter flushing).
2150 * Takes ownership of @buffer */
2151 static GstFlowReturn
2152 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
2153 gint * skip, gint * flushed)
2155 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2156 GstBaseParseFrame *frame;
2159 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
2161 GST_LOG_OBJECT (parse,
2162 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2163 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2164 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2165 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2166 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2168 /* track what is being flushed during this single round of frame processing */
2169 parse->priv->flushed = 0;
2172 /* make it easy for _finish_frame to pick up input data */
2173 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2174 gst_buffer_ref (buffer);
2175 gst_adapter_push (parse->priv->adapter, buffer);
2178 frame = gst_base_parse_prepare_frame (parse, buffer);
2179 ret = klass->handle_frame (parse, frame, skip);
2181 *flushed = parse->priv->flushed;
2183 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
2186 /* subclass can only do one of these, or semantics are too unclear */
2187 g_assert (*skip == 0 || *flushed == 0);
2189 /* track skipping */
2191 GstClockTime pts, dts;
2194 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
2195 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
2196 /* reverse playback, and no frames found yet, so we are skipping
2197 * the leading part of a fragment, which may form the tail of
2198 * fragment coming later, hopefully subclass skips efficiently ... */
2199 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2200 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2201 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2202 outbuf = gst_buffer_make_writable (outbuf);
2203 GST_BUFFER_PTS (outbuf) = pts;
2204 GST_BUFFER_DTS (outbuf) = dts;
2205 parse->priv->buffers_head =
2206 g_slist_prepend (parse->priv->buffers_head, outbuf);
2209 /* If we're asked to skip more than is available in the adapter,
2210 we need to remember what we need to skip for next iteration */
2211 gsize av = gst_adapter_available (parse->priv->adapter);
2212 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2214 gst_adapter_flush (parse->priv->adapter, *skip);
2217 ("This is more than available, flushing %" G_GSIZE_FORMAT
2218 ", storing %u to skip", av, (guint) (*skip - av));
2219 parse->priv->skip = *skip - av;
2220 gst_adapter_flush (parse->priv->adapter, av);
2224 if (!parse->priv->discont)
2225 parse->priv->sync_offset = parse->priv->offset;
2226 parse->priv->offset += *skip;
2227 parse->priv->discont = TRUE;
2228 /* check for indefinite skipping */
2229 if (ret == GST_FLOW_OK)
2230 ret = gst_base_parse_check_sync (parse);
2233 parse->priv->offset += *flushed;
2235 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2236 gst_adapter_clear (parse->priv->adapter);
2239 if (*skip == 0 && *flushed == 0) {
2240 /* Carry over discont if we need more data */
2241 if (GST_BUFFER_IS_DISCONT (frame->buffer))
2242 parse->priv->discont = TRUE;
2245 gst_base_parse_frame_free (frame);
2250 /* gst_base_parse_push_pending_events:
2251 * @parse: #GstBaseParse
2253 * Pushes the pending events
2256 gst_base_parse_push_pending_events (GstBaseParse * parse)
2258 if (G_UNLIKELY (parse->priv->pending_events)) {
2259 GList *r = g_list_reverse (parse->priv->pending_events);
2262 parse->priv->pending_events = NULL;
2263 for (l = r; l != NULL; l = l->next) {
2264 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2270 /* gst_base_parse_handle_and_push_frame:
2271 * @parse: #GstBaseParse.
2272 * @klass: #GstBaseParseClass.
2273 * @frame: (transfer full): a #GstBaseParseFrame
2275 * Parses the frame from given buffer and pushes it forward. Also performs
2276 * timestamp handling and checks the segment limits.
2278 * This is called with srcpad STREAM_LOCK held.
2280 * Returns: #GstFlowReturn
2282 static GstFlowReturn
2283 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2284 GstBaseParseFrame * frame)
2289 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2291 buffer = frame->buffer;
2292 offset = frame->offset;
2294 /* check if subclass/format can provide ts.
2295 * If so, that allows and enables extra seek and duration determining options */
2296 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2297 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2298 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2299 parse->priv->first_frame_offset = offset;
2300 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2301 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2302 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2303 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2304 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2305 GST_TIME_ARGS (parse->priv->first_frame_pts),
2306 parse->priv->first_frame_offset);
2307 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2309 GstClockTime last_ts = G_MAXINT64;
2311 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2312 gst_base_parse_locate_time (parse, &last_ts, &off);
2313 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2314 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2317 /* disable further checks */
2318 parse->priv->first_frame_offset = 0;
2322 /* track upstream time if provided, not subclass' internal notion of it */
2323 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2324 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2325 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2328 /* interpolating and no valid pts yet,
2329 * start with dts and carry on from there */
2330 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2331 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2332 parse->priv->next_pts = parse->priv->next_dts;
2334 /* again use default handler to add missing metadata;
2335 * we may have new information on frame properties */
2336 gst_base_parse_parse_frame (parse, frame);
2338 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2339 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2340 parse->priv->next_dts =
2341 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2342 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2343 GstClockTime next_pts =
2344 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2345 if (next_pts >= parse->priv->next_dts)
2346 parse->priv->next_pts = next_pts;
2349 /* we lost track, do not produce bogus time next time around
2350 * (probably means parser subclass has given up on parsing as well) */
2351 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2352 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2355 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2356 GST_BUFFER_PTS_IS_VALID (buffer))
2357 gst_base_parse_add_index_entry (parse, offset,
2358 GST_BUFFER_PTS (buffer),
2359 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2361 /* All OK, push queued frames if there are any */
2362 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2363 GstBaseParseFrame *queued_frame;
2365 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2366 gst_base_parse_push_frame (parse, queued_frame);
2367 gst_base_parse_frame_free (queued_frame);
2371 return gst_base_parse_push_frame (parse, frame);
2375 * gst_base_parse_push_frame:
2376 * @parse: #GstBaseParse.
2377 * @frame: (transfer none): a #GstBaseParseFrame
2379 * Pushes the frame's buffer downstream, sends any pending events and
2380 * does some timestamp and segment handling. Takes ownership of
2381 * frame's buffer, though caller retains ownership of @frame.
2383 * This must be called with sinkpad STREAM_LOCK held.
2385 * Returns: #GstFlowReturn
2388 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2390 GstFlowReturn ret = GST_FLOW_OK;
2391 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2392 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2393 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2397 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2398 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2400 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2402 buffer = frame->buffer;
2404 GST_LOG_OBJECT (parse,
2405 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2406 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2407 gst_buffer_get_size (buffer),
2408 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2409 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2410 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2413 parse->priv->bytecount += frame->size;
2414 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2415 parse->priv->framecount++;
2416 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2417 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2420 /* 0 means disabled */
2421 if (parse->priv->update_interval < 0)
2422 parse->priv->update_interval = 50;
2423 else if (parse->priv->update_interval > 0 &&
2424 (parse->priv->framecount % parse->priv->update_interval) == 0)
2425 gst_base_parse_update_duration (parse);
2427 if (GST_BUFFER_PTS_IS_VALID (buffer))
2428 last_start = last_stop = GST_BUFFER_PTS (buffer);
2429 if (last_start != GST_CLOCK_TIME_NONE
2430 && GST_BUFFER_DURATION_IS_VALID (buffer))
2431 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2433 /* should have caps by now */
2434 if (!gst_pad_has_current_caps (parse->srcpad))
2437 if (G_UNLIKELY (!parse->priv->checked_media)) {
2438 /* have caps; check identity */
2439 gst_base_parse_check_media (parse);
2442 if (parse->priv->tags_changed) {
2443 gst_base_parse_queue_tag_event_update (parse);
2444 parse->priv->tags_changed = FALSE;
2447 /* Push pending events, including SEGMENT events */
2448 gst_base_parse_push_pending_events (parse);
2450 /* segment adjustment magic; only if we are running the whole show */
2451 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2452 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2453 parse->priv->upstream_seekable)) {
2455 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2456 GST_CLOCK_TIME_IS_VALID (last_start)) {
2457 GstClockTimeDiff diff;
2459 /* only send newsegments with increasing start times,
2460 * otherwise if these go back and forth downstream (sinks) increase
2461 * accumulated time and running_time */
2462 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2463 if (G_UNLIKELY (diff > 2 * GST_SECOND
2464 && last_start > parse->segment.start
2465 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2466 || last_start < parse->segment.stop))) {
2468 GST_DEBUG_OBJECT (parse,
2469 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2470 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2471 "Sending updated SEGMENT events", diff,
2472 GST_TIME_ARGS (parse->segment.position),
2473 GST_TIME_ARGS (last_start));
2475 /* skip gap FIXME */
2476 gst_pad_push_event (parse->srcpad,
2477 gst_event_new_segment (&parse->segment));
2479 parse->segment.position = last_start;
2484 /* update bitrates and optionally post corresponding tags
2485 * (following newsegment) */
2486 gst_base_parse_update_bitrates (parse, frame);
2488 if (klass->pre_push_frame) {
2489 ret = klass->pre_push_frame (parse, frame);
2491 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2494 /* Push pending events, if there are any new ones
2495 * like tags added by pre_push_frame */
2496 if (parse->priv->tags_changed) {
2497 gst_base_parse_queue_tag_event_update (parse);
2498 parse->priv->tags_changed = FALSE;
2500 gst_base_parse_push_pending_events (parse);
2502 /* take final ownership of frame buffer */
2503 if (frame->out_buffer) {
2504 buffer = frame->out_buffer;
2505 frame->out_buffer = NULL;
2506 gst_buffer_replace (&frame->buffer, NULL);
2508 buffer = frame->buffer;
2509 frame->buffer = NULL;
2512 /* subclass must play nice */
2513 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2515 size = gst_buffer_get_size (buffer);
2517 parse->priv->seen_keyframe |= parse->priv->is_video &&
2518 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2520 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2521 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2522 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2523 GST_BUFFER_TIMESTAMP (buffer) >
2524 parse->segment.stop + parse->priv->lead_out_ts) {
2525 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2527 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2528 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2529 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2530 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2531 parse->priv->lead_in_ts < parse->segment.start) {
2532 if (parse->priv->seen_keyframe) {
2533 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2536 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2537 ret = GST_BASE_PARSE_FLOW_DROPPED;
2544 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2545 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2546 if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
2547 parse->priv->discont = TRUE;
2548 gst_buffer_unref (buffer);
2550 } else if (ret == GST_FLOW_OK) {
2551 if (parse->segment.rate > 0.0) {
2552 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2554 ret = gst_pad_push (parse->srcpad, buffer);
2555 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2556 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2558 /* in backwards playback mode, if on passthrough we need to push buffers
2559 * directly without accumulating them into the buffers_queued as baseparse
2560 * will never check for a DISCONT while on passthrough and those buffers
2561 * will never be pushed.
2563 * also, as we are on reverse playback, it might be possible that
2564 * passthrough might have just been enabled, so make sure to drain the
2565 * buffers_queued list */
2566 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2567 gst_base_parse_finish_fragment (parse, TRUE);
2568 ret = gst_base_parse_send_buffers (parse);
2571 if (ret == GST_FLOW_OK) {
2572 GST_LOG_OBJECT (parse,
2573 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2574 ret = gst_pad_push (parse->srcpad, buffer);
2575 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2576 gst_flow_get_name (ret));
2578 GST_LOG_OBJECT (parse,
2579 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2580 gst_flow_get_name (ret));
2581 gst_buffer_unref (buffer);
2585 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2587 parse->priv->buffers_queued =
2588 g_slist_prepend (parse->priv->buffers_queued, buffer);
2592 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2593 size, gst_flow_get_name (ret));
2594 gst_buffer_unref (buffer);
2595 /* if we are not sufficiently in control, let upstream decide on EOS */
2596 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2597 (parse->priv->passthrough ||
2598 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2599 !parse->priv->upstream_seekable)))
2603 /* Update current running segment position */
2604 if ((ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
2605 && last_stop != GST_CLOCK_TIME_NONE
2606 && parse->segment.position < last_stop)
2607 parse->segment.position = last_stop;
2614 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2615 return GST_FLOW_FLUSHING;
2617 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2618 return GST_FLOW_ERROR;
2623 * gst_base_parse_finish_frame:
2624 * @parse: a #GstBaseParse
2625 * @frame: a #GstBaseParseFrame
2626 * @size: consumed input data represented by frame
2628 * Collects parsed data and pushes this downstream.
2629 * Source pad caps must be set when this is called.
2631 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2632 * Otherwise, @size samples will be taken from the input and used for output,
2633 * and the output's metadata (timestamps etc) will be taken as (optionally)
2634 * set by the subclass on @frame's (input) buffer (which is otherwise
2635 * ignored for any but the above purpose/information).
2637 * Note that the latter buffer is invalidated by this call, whereas the
2638 * caller retains ownership of @frame.
2640 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2643 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2646 GstFlowReturn ret = GST_FLOW_OK;
2648 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2649 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2650 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2651 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2654 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2655 "flushing size %d", frame->offset, size);
2657 /* some one-time start-up */
2658 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2659 gst_base_parse_check_seekability (parse);
2660 gst_base_parse_check_upstream (parse);
2663 parse->priv->flushed += size;
2665 if (parse->priv->scanning && frame->buffer) {
2666 if (!parse->priv->scanned_frame) {
2667 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2672 /* either PUSH or PULL mode arranges for adapter data */
2673 /* ensure output buffer */
2674 if (!frame->out_buffer) {
2675 GstBuffer *src, *dest;
2677 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2678 dest = frame->out_buffer;
2679 src = frame->buffer;
2680 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2681 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2682 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2683 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2684 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2685 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2687 gst_adapter_flush (parse->priv->adapter, size);
2690 /* use as input for subsequent processing */
2691 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2692 gst_buffer_unref (frame->out_buffer);
2693 frame->out_buffer = NULL;
2695 /* mark input size consumed */
2698 /* subclass might queue frames/data internally if it needs more
2699 * frames to decide on the format, or might request us to queue here. */
2700 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2701 gst_buffer_replace (&frame->buffer, NULL);
2703 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2704 GstBaseParseFrame *copy;
2706 copy = gst_base_parse_frame_copy (frame);
2707 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2708 gst_base_parse_queue_frame (parse, copy);
2712 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2719 * gst_base_parse_drain:
2720 * @parse: a #GstBaseParse
2722 * Drains the adapter until it is empty. It decreases the min_frame_size to
2723 * match the current adapter size and calls chain method until the adapter
2724 * is emptied or chain returns with error.
2729 gst_base_parse_drain (GstBaseParse * parse)
2733 GST_DEBUG_OBJECT (parse, "draining");
2734 parse->priv->drain = TRUE;
2737 avail = gst_adapter_available (parse->priv->adapter);
2741 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2742 NULL) != GST_FLOW_OK) {
2746 /* nothing changed, maybe due to truncated frame; break infinite loop */
2747 if (avail == gst_adapter_available (parse->priv->adapter)) {
2748 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2749 gst_adapter_clear (parse->priv->adapter);
2753 parse->priv->drain = FALSE;
2756 /* gst_base_parse_send_buffers
2758 * Sends buffers collected in send_buffers downstream, and ensures that list
2759 * is empty at the end (errors or not).
2761 static GstFlowReturn
2762 gst_base_parse_send_buffers (GstBaseParse * parse)
2764 GSList *send = NULL;
2766 GstFlowReturn ret = GST_FLOW_OK;
2767 gboolean first = TRUE;
2769 send = parse->priv->buffers_send;
2773 buf = GST_BUFFER_CAST (send->data);
2774 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2775 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2776 ", offset %" G_GINT64_FORMAT, buf,
2777 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2778 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2779 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2781 /* Make sure the first buffer is always DISCONT. If we split
2782 * GOPs inside the parser this is otherwise not guaranteed */
2784 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2787 /* likewise, subsequent buffers should never have DISCONT
2788 * according to the "reverse fragment protocol", or such would
2789 * confuse a downstream decoder
2790 * (could be DISCONT due to aggregating upstream fragments by parsing) */
2791 GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
2794 /* iterate output queue an push downstream */
2795 ret = gst_pad_push (parse->srcpad, buf);
2796 send = g_slist_delete_link (send, send);
2798 /* clear any leftover if error */
2799 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2801 buf = GST_BUFFER_CAST (send->data);
2802 gst_buffer_unref (buf);
2803 send = g_slist_delete_link (send, send);
2808 parse->priv->buffers_send = send;
2813 /* gst_base_parse_start_fragment:
2815 * Prepares for processing a reverse playback (forward) fragment
2816 * by (re)setting proper state variables.
2818 static GstFlowReturn
2819 gst_base_parse_start_fragment (GstBaseParse * parse)
2821 GST_LOG_OBJECT (parse, "starting fragment");
2823 /* invalidate so no fall-back timestamping is performed;
2824 * ok if taken from subclass or upstream */
2825 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2826 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2827 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2828 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2829 parse->priv->prev_dts_from_pts = FALSE;
2830 /* prevent it hanging around stop all the time */
2831 parse->segment.position = GST_CLOCK_TIME_NONE;
2833 parse->priv->discont = TRUE;
2835 /* head of previous fragment is now pending tail of current fragment */
2836 parse->priv->buffers_pending = parse->priv->buffers_head;
2837 parse->priv->buffers_head = NULL;
2843 /* gst_base_parse_finish_fragment:
2845 * Processes a reverse playback (forward) fragment:
2846 * - append head of last fragment that was skipped to current fragment data
2847 * - drain the resulting current fragment data (i.e. repeated chain)
2848 * - add time/duration (if needed) to frames queued by chain
2849 * - push queued data
2851 static GstFlowReturn
2852 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2855 GstFlowReturn ret = GST_FLOW_OK;
2856 gboolean seen_key = FALSE, seen_delta = FALSE;
2858 GST_LOG_OBJECT (parse, "finishing fragment");
2861 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2862 while (parse->priv->buffers_pending) {
2863 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2865 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2866 gst_buffer_get_size (buf));
2867 gst_adapter_push (parse->priv->adapter, buf);
2869 GST_LOG_OBJECT (parse, "discarding head buffer");
2870 gst_buffer_unref (buf);
2872 parse->priv->buffers_pending =
2873 g_slist_delete_link (parse->priv->buffers_pending,
2874 parse->priv->buffers_pending);
2877 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2878 /* initial skipped data is added to buffers_pending */
2879 gst_base_parse_drain (parse);
2881 if (parse->priv->buffers_send) {
2882 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2883 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2886 /* add metadata (if needed to queued buffers */
2887 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2888 GST_TIME_ARGS (parse->priv->last_pts));
2889 while (parse->priv->buffers_queued) {
2890 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2892 /* no touching if upstream or parsing provided time */
2893 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2894 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2895 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2896 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2897 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2898 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2899 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2901 parse->priv->last_pts = 0;
2902 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2903 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2904 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2906 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2907 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2908 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2910 parse->priv->last_dts = 0;
2911 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2912 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2913 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2916 /* no idea, very bad */
2917 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2920 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2921 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2923 /* reverse order for ascending sending */
2924 /* send downstream at keyframe not preceded by a keyframe
2925 * (e.g. that should identify start of collection of IDR nals) */
2926 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2928 ret = gst_base_parse_send_buffers (parse);
2929 /* if a problem, throw all to sending */
2930 if (ret != GST_FLOW_OK) {
2931 parse->priv->buffers_send =
2932 g_slist_reverse (parse->priv->buffers_queued);
2933 parse->priv->buffers_queued = NULL;
2943 parse->priv->buffers_send =
2944 g_slist_prepend (parse->priv->buffers_send, buf);
2945 parse->priv->buffers_queued =
2946 g_slist_delete_link (parse->priv->buffers_queued,
2947 parse->priv->buffers_queued);
2950 /* audio may have all marked as keyframe, so arrange to send here. Also
2951 * we might have ended the loop above on a keyframe, in which case we
2953 if (!seen_delta || seen_key)
2954 ret = gst_base_parse_send_buffers (parse);
2956 /* any trailing unused no longer usable (ideally none) */
2957 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2958 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2959 gst_adapter_available (parse->priv->adapter));
2960 gst_adapter_clear (parse->priv->adapter);
2966 /* small helper that checks whether we have been trying to resync too long */
2967 static inline GstFlowReturn
2968 gst_base_parse_check_sync (GstBaseParse * parse)
2970 if (G_UNLIKELY (parse->priv->discont &&
2971 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2972 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2973 ("Failed to parse stream"), (NULL));
2974 return GST_FLOW_ERROR;
2980 static GstFlowReturn
2981 gst_base_parse_process_streamheader (GstBaseParse * parse)
2985 const GValue *value;
2986 GstFlowReturn ret = GST_FLOW_OK;
2988 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2992 str = gst_caps_get_structure (caps, 0);
2993 value = gst_structure_get_value (str, "streamheader");
2997 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2999 if (GST_VALUE_HOLDS_ARRAY (value)) {
3001 gsize len = gst_value_array_get_size (value);
3003 for (i = 0; i < len; i++) {
3005 gst_value_get_buffer (gst_value_array_get_value (value, i));
3007 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3008 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
3011 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
3012 GstBuffer *buffer = gst_value_get_buffer (value);
3014 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3015 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
3018 gst_caps_unref (caps);
3025 gst_caps_unref (caps);
3028 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
3033 static GstFlowReturn
3034 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
3036 GstBaseParseClass *bclass;
3037 GstBaseParse *parse;
3038 GstFlowReturn ret = GST_FLOW_OK;
3039 GstFlowReturn old_ret = GST_FLOW_OK;
3040 GstBuffer *tmpbuf = NULL;
3044 GstClockTime pts, dts;
3046 parse = GST_BASE_PARSE (parent);
3047 bclass = GST_BASE_PARSE_GET_CLASS (parse);
3048 GST_DEBUG_OBJECT (parent, "chain");
3050 /* early out for speed, if we need to skip */
3051 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
3052 parse->priv->skip = 0;
3053 if (parse->priv->skip > 0) {
3054 gsize bsize = gst_buffer_get_size (buffer);
3055 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
3057 if (parse->priv->skip >= bsize) {
3058 parse->priv->skip -= bsize;
3059 GST_DEBUG ("All the buffer is skipped");
3060 parse->priv->offset += bsize;
3061 parse->priv->sync_offset = parse->priv->offset;
3064 buffer = gst_buffer_make_writable (buffer);
3065 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
3066 parse->priv->offset += parse->priv->skip;
3067 GST_DEBUG ("Done skipping, we have %u left on this buffer",
3068 (unsigned) (bsize - parse->priv->skip));
3069 parse->priv->skip = 0;
3070 parse->priv->discont = TRUE;
3073 if (G_UNLIKELY (parse->priv->first_buffer)) {
3074 parse->priv->first_buffer = FALSE;
3075 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
3076 /* this stream has no header buffers, check if we just prepend the
3077 * streamheader from caps to the stream */
3078 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
3079 "prepend to the stream");
3080 gst_base_parse_process_streamheader (parse);
3082 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
3083 "streamheader from caps");
3087 if (parse->priv->detecting) {
3088 GstBuffer *detect_buf;
3090 if (parse->priv->detect_buffers_size == 0) {
3091 detect_buf = gst_buffer_ref (buffer);
3096 detect_buf = gst_buffer_new ();
3098 for (l = parse->priv->detect_buffers; l; l = l->next) {
3099 gsize tmpsize = gst_buffer_get_size (l->data);
3101 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
3102 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
3106 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
3107 offset, gst_buffer_get_size (buffer));
3110 ret = bclass->detect (parse, detect_buf);
3111 gst_buffer_unref (detect_buf);
3113 if (ret == GST_FLOW_OK) {
3116 /* Detected something */
3117 parse->priv->detecting = FALSE;
3119 for (l = parse->priv->detect_buffers; l; l = l->next) {
3120 if (ret == GST_FLOW_OK && !parse->priv->flushing)
3122 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
3123 parent, GST_BUFFER_CAST (l->data));
3125 gst_buffer_unref (GST_BUFFER_CAST (l->data));
3127 g_list_free (parse->priv->detect_buffers);
3128 parse->priv->detect_buffers = NULL;
3129 parse->priv->detect_buffers_size = 0;
3131 if (ret != GST_FLOW_OK) {
3135 /* Handle the current buffer */
3136 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
3137 /* Still detecting, append buffer or error out if draining */
3139 if (parse->priv->drain) {
3140 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
3141 return GST_FLOW_ERROR;
3142 } else if (parse->priv->flushing) {
3143 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
3145 g_list_free (parse->priv->detect_buffers);
3146 parse->priv->detect_buffers = NULL;
3147 parse->priv->detect_buffers_size = 0;
3149 parse->priv->detect_buffers =
3150 g_list_append (parse->priv->detect_buffers, buffer);
3151 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
3155 /* Something went wrong, subclass responsible for error reporting */
3159 /* And now handle the current buffer if detection worked */
3162 if (G_LIKELY (buffer)) {
3163 GST_LOG_OBJECT (parse,
3164 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
3165 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
3166 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
3167 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
3168 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
3170 if (G_UNLIKELY (!parse->priv->disable_passthrough
3171 && parse->priv->passthrough)) {
3172 GstBaseParseFrame frame;
3174 gst_base_parse_frame_init (&frame);
3175 frame.buffer = gst_buffer_make_writable (buffer);
3176 ret = gst_base_parse_push_frame (parse, &frame);
3177 gst_base_parse_frame_free (&frame);
3180 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
3181 /* upstream feeding us in reverse playback;
3182 * finish previous fragment and start new upon DISCONT */
3183 if (parse->segment.rate < 0.0) {
3184 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
3185 ret = gst_base_parse_finish_fragment (parse, TRUE);
3186 gst_base_parse_start_fragment (parse);
3188 /* discont in the stream, drain and mark discont for next output */
3189 gst_base_parse_drain (parse);
3190 parse->priv->discont = TRUE;
3193 gst_adapter_push (parse->priv->adapter, buffer);
3196 /* Parse and push as many frames as possible */
3197 /* Stop either when adapter is empty or we are flushing */
3198 while (!parse->priv->flushing) {
3200 gboolean updated_prev_pts = FALSE;
3202 /* note: if subclass indicates MAX fsize,
3203 * this will not likely be available anyway ... */
3204 min_size = MAX (parse->priv->min_frame_size, fsize);
3205 av = gst_adapter_available (parse->priv->adapter);
3207 if (G_UNLIKELY (parse->priv->drain)) {
3209 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
3210 if (G_UNLIKELY (!min_size)) {
3215 /* Collect at least min_frame_size bytes */
3216 if (av < min_size) {
3217 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
3221 /* move along with upstream timestamp (if any),
3222 * but interpolate in between */
3223 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
3224 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
3225 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts)) {
3226 parse->priv->prev_pts = parse->priv->next_pts = pts;
3227 updated_prev_pts = TRUE;
3230 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
3231 parse->priv->prev_dts = parse->priv->next_dts = dts;
3232 parse->priv->prev_dts_from_pts = FALSE;
3235 /* we can mess with, erm interpolate, timestamps,
3236 * and incoming stuff has PTS but no DTS seen so far,
3237 * then pick up DTS from PTS and hope for the best ... */
3238 if (parse->priv->infer_ts &&
3239 parse->priv->pts_interpolate &&
3240 !GST_CLOCK_TIME_IS_VALID (dts) &&
3241 (!GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts)
3242 || (parse->priv->prev_dts_from_pts && updated_prev_pts))
3243 && GST_CLOCK_TIME_IS_VALID (pts)) {
3244 parse->priv->prev_dts = parse->priv->next_dts = pts;
3245 parse->priv->prev_dts_from_pts = TRUE;
3248 /* always pass all available data */
3249 tmpbuf = gst_adapter_get_buffer (parse->priv->adapter, av);
3251 /* already inform subclass what timestamps we have planned,
3252 * at least if provided by time-based upstream */
3253 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3254 tmpbuf = gst_buffer_make_writable (tmpbuf);
3255 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3256 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3257 GST_BUFFER_DURATION (tmpbuf) = GST_CLOCK_TIME_NONE;
3260 /* keep the adapter mapped, so keep track of what has to be flushed */
3261 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3264 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3267 if (skip == 0 && flush == 0) {
3268 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3269 "breaking to get more data");
3270 /* ignore this return as it produced no data */
3278 GST_LOG_OBJECT (parse, "chain leaving");
3282 /* pull @size bytes at current offset,
3283 * i.e. at least try to and possibly return a shorter buffer if near the end */
3284 static GstFlowReturn
3285 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3286 GstBuffer ** buffer)
3288 GstFlowReturn ret = GST_FLOW_OK;
3290 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3292 /* Caching here actually makes much less difference than one would expect.
3293 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3294 if (parse->priv->cache) {
3295 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3296 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3298 if (cache_offset <= parse->priv->offset &&
3299 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3300 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3301 parse->priv->offset - cache_offset, size);
3302 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3305 /* not enough data in the cache, free cache and get a new one */
3306 gst_buffer_unref (parse->priv->cache);
3307 parse->priv->cache = NULL;
3310 /* refill the cache */
3312 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3313 64 * 1024), &parse->priv->cache);
3314 if (ret != GST_FLOW_OK) {
3315 parse->priv->cache = NULL;
3319 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3321 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3323 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3327 /* Not possible to get enough data, try a last time with
3328 * requesting exactly the size we need */
3329 gst_buffer_unref (parse->priv->cache);
3330 parse->priv->cache = NULL;
3332 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3333 &parse->priv->cache);
3335 if (ret != GST_FLOW_OK) {
3336 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3341 if (gst_buffer_get_size (parse->priv->cache) < size) {
3342 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3343 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3344 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3346 *buffer = parse->priv->cache;
3347 parse->priv->cache = NULL;
3353 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3354 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3359 static GstFlowReturn
3360 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3363 GstClockTime ts = 0;
3367 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3368 ", last_offset = %" G_GINT64_FORMAT,
3369 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3371 if (!parse->priv->last_offset
3372 || parse->priv->last_pts <= parse->segment.start) {
3373 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3374 GST_TIME_ARGS (parse->segment.start));
3379 /* last fragment started at last_offset / last_ts;
3380 * seek back 10s capped at 1MB */
3381 if (parse->priv->last_pts >= 10 * GST_SECOND)
3382 ts = parse->priv->last_pts - 10 * GST_SECOND;
3383 /* if we are exact now, we will be more so going backwards */
3384 if (parse->priv->exact_position) {
3385 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3387 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3388 GST_FORMAT_BYTES, &offset)) {
3389 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3392 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3393 parse->priv->last_offset - 1024);
3394 offset = MAX (0, offset);
3396 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3398 parse->priv->offset = offset;
3400 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3402 if (ret != GST_FLOW_OK)
3405 /* offset will increase again as fragment is processed/parsed */
3406 parse->priv->last_offset = offset;
3408 gst_base_parse_start_fragment (parse);
3409 gst_adapter_push (parse->priv->adapter, buffer);
3410 ret = gst_base_parse_finish_fragment (parse, TRUE);
3411 if (ret != GST_FLOW_OK)
3414 /* force previous fragment */
3415 parse->priv->offset = -1;
3422 * pull and scan for next frame starting from current offset
3423 * ajusts sync, drain and offset going along */
3424 static GstFlowReturn
3425 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3428 GstFlowReturn ret = GST_FLOW_OK;
3429 guint fsize, min_size;
3433 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3434 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3436 /* let's make this efficient for all subclass once and for all;
3437 * maybe it does not need this much, but in the latter case, we know we are
3438 * in pull mode here and might as well try to read and supply more anyway
3439 * (so does the buffer caching mechanism) */
3443 min_size = MAX (parse->priv->min_frame_size, fsize);
3445 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3447 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3448 if (ret != GST_FLOW_OK)
3451 /* if we got a short read, inform subclass we are draining leftover
3452 * and no more is to be expected */
3453 if (gst_buffer_get_size (buffer) < min_size) {
3454 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3455 parse->priv->drain = TRUE;
3458 if (parse->priv->detecting) {
3459 ret = klass->detect (parse, buffer);
3460 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3461 /* If draining we error out, otherwise request a buffer
3463 if (parse->priv->drain) {
3464 gst_buffer_unref (buffer);
3465 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3466 return GST_FLOW_ERROR;
3469 gst_buffer_unref (buffer);
3472 } else if (ret != GST_FLOW_OK) {
3473 gst_buffer_unref (buffer);
3474 GST_ERROR_OBJECT (parse, "detect() returned %s",
3475 gst_flow_get_name (ret));
3479 /* Else handle this buffer normally */
3482 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3483 if (ret != GST_FLOW_OK)
3486 /* If a large amount of data was requested to be skipped, _handle_buffer
3487 might have set the priv->skip flag to an extra amount on top of skip.
3488 In pull mode, we can just pull from the new offset directly. */
3489 parse->priv->offset += parse->priv->skip;
3490 parse->priv->skip = 0;
3492 /* something flushed means something happened,
3493 * and we should bail out of this loop so as not to occupy
3494 * the task thread indefinitely */
3496 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3499 /* nothing flushed, no skip and draining, so nothing left to do */
3500 if (!skip && parse->priv->drain) {
3501 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3502 "breaking loop and marking EOS");
3506 /* otherwise, get some more data
3507 * note that is checked this does not happen indefinitely */
3509 GST_LOG_OBJECT (parse, "getting some more data");
3512 parse->priv->drain = FALSE;
3519 /* Loop that is used in pull mode to retrieve data from upstream */
3521 gst_base_parse_loop (GstPad * pad)
3523 GstBaseParse *parse;
3524 GstBaseParseClass *klass;
3525 GstFlowReturn ret = GST_FLOW_OK;
3527 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3528 klass = GST_BASE_PARSE_GET_CLASS (parse);
3530 GST_LOG_OBJECT (parse, "Entering parse loop");
3532 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3537 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3540 event = gst_event_new_stream_start (stream_id);
3541 gst_event_set_group_id (event, gst_util_group_id_next ());
3543 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3544 gst_pad_push_event (parse->srcpad, event);
3545 parse->priv->push_stream_start = FALSE;
3549 /* reverse playback:
3550 * first fragment (closest to stop time) is handled normally below,
3551 * then we pull in fragments going backwards */
3552 if (parse->segment.rate < 0.0) {
3553 /* check if we jumped back to a previous fragment,
3554 * which is a post-first fragment */
3555 if (parse->priv->offset < 0) {
3556 ret = gst_base_parse_handle_previous_fragment (parse);
3561 ret = gst_base_parse_scan_frame (parse, klass);
3563 /* eat expected eos signalling past segment in reverse playback */
3564 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3565 parse->segment.position >= parse->segment.stop) {
3566 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3567 /* push what was accumulated during loop run */
3568 gst_base_parse_finish_fragment (parse, FALSE);
3569 /* force previous fragment */
3570 parse->priv->offset = -1;
3574 if (ret != GST_FLOW_OK)
3578 if (ret == GST_FLOW_EOS)
3580 else if (ret != GST_FLOW_OK)
3583 gst_object_unref (parse);
3590 GST_DEBUG_OBJECT (parse, "eos");
3595 gboolean push_eos = FALSE;
3597 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3598 gst_flow_get_name (ret));
3599 gst_pad_pause_task (parse->sinkpad);
3601 if (ret == GST_FLOW_EOS) {
3602 /* handle end-of-stream/segment */
3603 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3606 if ((stop = parse->segment.stop) == -1)
3607 stop = parse->segment.duration;
3609 GST_DEBUG_OBJECT (parse, "sending segment_done");
3611 gst_element_post_message
3612 (GST_ELEMENT_CAST (parse),
3613 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3614 GST_FORMAT_TIME, stop));
3615 gst_pad_push_event (parse->srcpad,
3616 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3618 /* If we STILL have zero frames processed, fire an error */
3619 if (parse->priv->framecount == 0) {
3620 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3621 ("No valid frames found before end of stream"), (NULL));
3625 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3626 /* for fatal errors we post an error message, wrong-state is
3627 * not fatal because it happens due to flushes and only means
3628 * that we should stop now. */
3629 GST_ELEMENT_FLOW_ERROR (parse, ret);
3633 if (parse->priv->estimated_duration <= 0) {
3634 gst_base_parse_update_duration (parse);
3636 /* Push pending events, including SEGMENT events */
3637 gst_base_parse_push_pending_events (parse);
3639 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3641 gst_object_unref (parse);
3646 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3648 GstSchedulingFlags sched_flags;
3649 GstBaseParse *parse;
3653 parse = GST_BASE_PARSE (parent);
3655 GST_DEBUG_OBJECT (parse, "sink activate");
3657 query = gst_query_new_scheduling ();
3658 if (!gst_pad_peer_query (sinkpad, query)) {
3659 gst_query_unref (query);
3660 goto baseparse_push;
3663 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3665 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3666 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3668 gst_query_unref (query);
3671 goto baseparse_push;
3673 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3674 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3675 goto baseparse_push;
3677 parse->priv->push_stream_start = TRUE;
3678 /* In pull mode, upstream is BYTES */
3679 parse->priv->upstream_format = GST_FORMAT_BYTES;
3681 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3686 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3687 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3692 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3694 GstBaseParseClass *klass;
3695 gboolean result = TRUE;
3697 GST_DEBUG_OBJECT (parse, "activate %d", active);
3699 klass = GST_BASE_PARSE_GET_CLASS (parse);
3702 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3703 result = klass->start (parse);
3705 /* If the subclass implements ::detect we want to
3706 * call it for the first buffers now */
3707 parse->priv->detecting = (klass->detect != NULL);
3709 /* We must make sure streaming has finished before resetting things
3710 * and calling the ::stop vfunc */
3711 GST_PAD_STREAM_LOCK (parse->sinkpad);
3712 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3714 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3715 result = klass->stop (parse);
3717 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3718 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
3720 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3725 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3726 GstPadMode mode, gboolean active)
3729 GstBaseParse *parse;
3731 parse = GST_BASE_PARSE (parent);
3733 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3734 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3736 if (!gst_base_parse_activate (parse, active))
3737 goto activate_failed;
3740 case GST_PAD_MODE_PULL:
3742 parse->priv->pending_events =
3743 g_list_prepend (parse->priv->pending_events,
3744 gst_event_new_segment (&parse->segment));
3747 result = gst_pad_stop_task (pad);
3755 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3757 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3764 GST_DEBUG_OBJECT (parse, "activate failed");
3770 * gst_base_parse_set_duration:
3771 * @parse: #GstBaseParse.
3773 * @duration: duration value.
3774 * @interval: how often to update the duration estimate based on bitrate, or 0.
3776 * Sets the duration of the currently playing media. Subclass can use this
3777 * when it is able to determine duration and/or notices a change in the media
3778 * duration. Alternatively, if @interval is non-zero (default), then stream
3779 * duration is determined based on estimated bitrate, and updated every @interval
3783 gst_base_parse_set_duration (GstBaseParse * parse,
3784 GstFormat fmt, gint64 duration, gint interval)
3786 g_return_if_fail (parse != NULL);
3788 if (parse->priv->upstream_has_duration) {
3789 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3793 if (duration != parse->priv->duration) {
3796 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3797 gst_element_post_message (GST_ELEMENT (parse), m);
3799 /* TODO: what about duration tag? */
3801 parse->priv->duration = duration;
3802 parse->priv->duration_fmt = fmt;
3803 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3804 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3805 if (interval != 0) {
3806 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3810 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3811 parse->priv->update_interval = interval;
3817 * gst_base_parse_set_average_bitrate:
3818 * @parse: #GstBaseParse.
3819 * @bitrate: average bitrate in bits/second
3821 * Optionally sets the average bitrate detected in media (if non-zero),
3822 * e.g. based on metadata, as it will be posted to the application.
3824 * By default, announced average bitrate is estimated. The average bitrate
3825 * is used to estimate the total duration of the stream and to estimate
3826 * a seek position, if there's no index and the format is syncable
3827 * (see gst_base_parse_set_syncable()).
3830 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3832 parse->priv->bitrate = bitrate;
3833 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3837 * gst_base_parse_set_min_frame_size:
3838 * @parse: #GstBaseParse.
3839 * @min_size: Minimum size of the data that this base class should give to
3842 * Subclass can use this function to tell the base class that it needs to
3843 * give at least #min_size buffers.
3846 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3848 g_return_if_fail (parse != NULL);
3850 parse->priv->min_frame_size = min_size;
3851 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3855 * gst_base_parse_set_frame_rate:
3856 * @parse: the #GstBaseParse to set
3857 * @fps_num: frames per second (numerator).
3858 * @fps_den: frames per second (denominator).
3859 * @lead_in: frames needed before a segment for subsequent decode
3860 * @lead_out: frames needed after a segment
3862 * If frames per second is configured, parser can take care of buffer duration
3863 * and timestamping. When performing segment clipping, or seeking to a specific
3864 * location, a corresponding decoder might need an initial @lead_in and a
3865 * following @lead_out number of frames to ensure the desired segment is
3866 * entirely filled upon decoding.
3869 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3870 guint fps_den, guint lead_in, guint lead_out)
3872 g_return_if_fail (parse != NULL);
3874 parse->priv->fps_num = fps_num;
3875 parse->priv->fps_den = fps_den;
3876 if (!fps_num || !fps_den) {
3877 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3879 fps_num = fps_den = 0;
3880 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3881 parse->priv->lead_in = parse->priv->lead_out = 0;
3882 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3884 parse->priv->frame_duration =
3885 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3886 parse->priv->lead_in = lead_in;
3887 parse->priv->lead_out = lead_out;
3888 parse->priv->lead_in_ts =
3889 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3890 parse->priv->lead_out_ts =
3891 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3892 /* aim for about 1.5s to estimate duration */
3893 if (parse->priv->update_interval < 0) {
3894 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3895 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3896 parse->priv->update_interval);
3899 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3900 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3901 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3902 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3903 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3904 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3908 * gst_base_parse_set_has_timing_info:
3909 * @parse: a #GstBaseParse
3910 * @has_timing: whether frames carry timing information
3912 * Set if frames carry timing information which the subclass can (generally)
3913 * parse and provide. In particular, intrinsic (rather than estimated) time
3914 * can be obtained following a seek.
3917 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3919 parse->priv->has_timing_info = has_timing;
3920 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3924 * gst_base_parse_set_syncable:
3925 * @parse: a #GstBaseParse
3926 * @syncable: set if frame starts can be identified
3928 * Set if frame starts can be identified. This is set by default and
3929 * determines whether seeking based on bitrate averages
3930 * is possible for a format/stream.
3933 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3935 parse->priv->syncable = syncable;
3936 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3940 * gst_base_parse_set_passthrough:
3941 * @parse: a #GstBaseParse
3942 * @passthrough: %TRUE if parser should run in passthrough mode
3944 * Set if the nature of the format or configuration does not allow (much)
3945 * parsing, and the parser should operate in passthrough mode (which only
3946 * applies when operating in push mode). That is, incoming buffers are
3947 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3948 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3949 * so subclass can perform as much or as little is appropriate for
3950 * passthrough semantics in @pre_push_frame.
3953 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3955 parse->priv->passthrough = passthrough;
3956 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3960 * gst_base_parse_set_pts_interpolation:
3961 * @parse: a #GstBaseParse
3962 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3964 * By default, the base class will guess PTS timestamps using a simple
3965 * interpolation (previous timestamp + duration), which is incorrect for
3966 * data streams with reordering, where PTS can go backward. Sub-classes
3967 * implementing such formats should disable PTS interpolation.
3970 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3971 gboolean pts_interpolate)
3973 parse->priv->pts_interpolate = pts_interpolate;
3974 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3975 (pts_interpolate) ? "yes" : "no");
3979 * gst_base_parse_set_infer_ts:
3980 * @parse: a #GstBaseParse
3981 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3983 * By default, the base class might try to infer PTS from DTS and vice
3984 * versa. While this is generally correct for audio data, it may not
3985 * be otherwise. Sub-classes implementing such formats should disable
3986 * timestamp inferring.
3989 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3991 parse->priv->infer_ts = infer_ts;
3992 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3996 * gst_base_parse_set_latency:
3997 * @parse: a #GstBaseParse
3998 * @min_latency: minimum parse latency
3999 * @max_latency: maximum parse latency
4001 * Sets the minimum and maximum (which may likely be equal) latency introduced
4002 * by the parsing process. If there is such a latency, which depends on the
4003 * particular parsing of the format, it typically corresponds to 1 frame duration.
4006 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
4007 GstClockTime max_latency)
4009 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
4010 g_return_if_fail (min_latency <= max_latency);
4012 GST_OBJECT_LOCK (parse);
4013 parse->priv->min_latency = min_latency;
4014 parse->priv->max_latency = max_latency;
4015 GST_OBJECT_UNLOCK (parse);
4016 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
4017 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
4018 GST_TIME_ARGS (max_latency));
4022 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
4023 GstClockTime * duration)
4025 gboolean res = FALSE;
4027 g_return_val_if_fail (duration != NULL, FALSE);
4029 *duration = GST_CLOCK_TIME_NONE;
4030 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
4031 GST_LOG_OBJECT (parse, "using provided duration");
4032 *duration = parse->priv->duration;
4034 } else if (parse->priv->duration != -1) {
4035 GST_LOG_OBJECT (parse, "converting provided duration");
4036 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
4037 parse->priv->duration, format, (gint64 *) duration);
4038 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
4039 GST_LOG_OBJECT (parse, "using estimated duration");
4040 *duration = parse->priv->estimated_duration;
4043 GST_LOG_OBJECT (parse, "cannot estimate duration");
4046 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
4047 GST_TIME_ARGS (*duration));
4052 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
4054 gboolean res = FALSE;
4057 pad = GST_BASE_PARSE_SRC_PAD (parse);
4059 switch (GST_QUERY_TYPE (query)) {
4060 case GST_QUERY_POSITION:
4065 GST_DEBUG_OBJECT (parse, "position query");
4066 gst_query_parse_position (query, &format, NULL);
4068 /* try upstream first */
4069 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4071 /* Fall back on interpreting segment */
4072 GST_OBJECT_LOCK (parse);
4073 /* Only reply BYTES if upstream is in BYTES already, otherwise
4074 * we're not in charge */
4075 if (format == GST_FORMAT_BYTES
4076 && parse->priv->upstream_format == GST_FORMAT_BYTES) {
4077 dest_value = parse->priv->offset;
4079 } else if (format == parse->segment.format &&
4080 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
4081 dest_value = gst_segment_to_stream_time (&parse->segment,
4082 parse->segment.format, parse->segment.position);
4085 GST_OBJECT_UNLOCK (parse);
4086 if (!res && parse->priv->upstream_format == GST_FORMAT_BYTES) {
4087 /* no precise result, upstream no idea either, then best estimate */
4088 /* priv->offset is updated in both PUSH/PULL modes, *iff* we're
4089 * in charge of things */
4090 res = gst_base_parse_convert (parse,
4091 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
4094 gst_query_set_position (query, format, dest_value);
4098 case GST_QUERY_DURATION:
4101 GstClockTime duration;
4103 GST_DEBUG_OBJECT (parse, "duration query");
4104 gst_query_parse_duration (query, &format, NULL);
4106 /* consult upstream */
4107 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4109 /* otherwise best estimate from us */
4111 res = gst_base_parse_get_duration (parse, format, &duration);
4113 gst_query_set_duration (query, format, duration);
4117 case GST_QUERY_SEEKING:
4120 GstClockTime duration = GST_CLOCK_TIME_NONE;
4121 gboolean seekable = FALSE;
4123 GST_DEBUG_OBJECT (parse, "seeking query");
4124 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
4126 /* consult upstream */
4127 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4129 /* we may be able to help if in TIME */
4130 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
4131 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
4132 /* already OK if upstream takes care */
4133 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
4135 if (!(res && seekable)) {
4136 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
4137 || duration == -1) {
4138 /* seekable if we still have a chance to get duration later on */
4140 parse->priv->upstream_seekable && parse->priv->update_interval;
4142 seekable = parse->priv->upstream_seekable;
4143 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
4146 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
4152 case GST_QUERY_FORMATS:
4153 gst_query_set_formatsv (query, 3, fmtlist);
4156 case GST_QUERY_CONVERT:
4158 GstFormat src_format, dest_format;
4159 gint64 src_value, dest_value;
4161 gst_query_parse_convert (query, &src_format, &src_value,
4162 &dest_format, &dest_value);
4164 res = gst_base_parse_convert (parse, src_format, src_value,
4165 dest_format, &dest_value);
4167 gst_query_set_convert (query, src_format, src_value,
4168 dest_format, dest_value);
4172 case GST_QUERY_LATENCY:
4174 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
4176 GstClockTime min_latency, max_latency;
4178 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
4179 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
4180 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
4181 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
4183 GST_OBJECT_LOCK (parse);
4184 /* add our latency */
4185 min_latency += parse->priv->min_latency;
4186 if (max_latency == -1 || parse->priv->max_latency == -1)
4189 max_latency += parse->priv->max_latency;
4190 GST_OBJECT_UNLOCK (parse);
4192 gst_query_set_latency (query, live, min_latency, max_latency);
4196 case GST_QUERY_SEGMENT:
4201 format = parse->segment.format;
4204 gst_segment_to_stream_time (&parse->segment, format,
4205 parse->segment.start);
4206 if ((stop = parse->segment.stop) == -1)
4207 stop = parse->segment.duration;
4209 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
4211 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
4216 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
4222 /* scans for a cluster start from @pos,
4223 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
4224 static GstFlowReturn
4225 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
4226 GstClockTime * time, GstClockTime * duration)
4228 GstBaseParseClass *klass;
4230 gboolean orig_drain, orig_discont;
4231 GstFlowReturn ret = GST_FLOW_OK;
4232 GstBuffer *buf = NULL;
4233 GstBaseParseFrame *sframe = NULL;
4235 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
4236 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
4237 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
4239 klass = GST_BASE_PARSE_GET_CLASS (parse);
4241 *time = GST_CLOCK_TIME_NONE;
4242 *duration = GST_CLOCK_TIME_NONE;
4245 orig_offset = parse->priv->offset;
4246 orig_discont = parse->priv->discont;
4247 orig_drain = parse->priv->drain;
4249 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4250 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4252 /* jump elsewhere and locate next frame */
4253 parse->priv->offset = *pos;
4254 /* mark as scanning so frames don't get processed all the way */
4255 parse->priv->scanning = TRUE;
4256 ret = gst_base_parse_scan_frame (parse, klass);
4257 parse->priv->scanning = FALSE;
4258 /* retrieve frame found during scan */
4259 sframe = parse->priv->scanned_frame;
4260 parse->priv->scanned_frame = NULL;
4262 if (ret != GST_FLOW_OK || !sframe)
4265 /* get offset first, subclass parsing might dump other stuff in there */
4266 *pos = sframe->offset;
4267 buf = sframe->buffer;
4270 /* but it should provide proper time */
4271 *time = GST_BUFFER_TIMESTAMP (buf);
4272 *duration = GST_BUFFER_DURATION (buf);
4274 GST_LOG_OBJECT (parse,
4275 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4276 GST_TIME_ARGS (*time), *pos);
4280 gst_base_parse_frame_free (sframe);
4283 parse->priv->offset = orig_offset;
4284 parse->priv->discont = orig_discont;
4285 parse->priv->drain = orig_drain;
4290 /* bisect and scan through file for frame starting before @time,
4291 * returns OK and @time/@offset if found, NONE and/or error otherwise
4292 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4293 static GstFlowReturn
4294 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4297 GstFlowReturn ret = GST_FLOW_OK;
4298 gint64 lpos, hpos, newpos;
4299 GstClockTime time, ltime, htime, newtime, dur;
4300 gboolean cont = TRUE;
4301 const GstClockTime tolerance = TARGET_DIFFERENCE;
4302 const guint chunk = 4 * 1024;
4304 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4305 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4307 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4308 GST_TIME_ARGS (*_time));
4310 /* TODO also make keyframe aware if useful some day */
4325 /* do not know at first */
4327 *_time = GST_CLOCK_TIME_NONE;
4329 /* need initial positions; start and end */
4330 lpos = parse->priv->first_frame_offset;
4331 ltime = parse->priv->first_frame_pts;
4332 /* try other one if no luck */
4333 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4334 ltime = parse->priv->first_frame_dts;
4335 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4336 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4337 return GST_FLOW_ERROR;
4339 hpos = parse->priv->upstream_size;
4341 GST_DEBUG_OBJECT (parse,
4342 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4343 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4344 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4346 /* check preconditions are satisfied;
4347 * start and end are needed, except for special case where we scan for
4348 * last frame to determine duration */
4349 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4350 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4351 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4355 /* shortcut cases */
4358 } else if (time < ltime + tolerance) {
4362 } else if (time >= htime) {
4368 while (htime > ltime && cont) {
4369 GST_LOG_OBJECT (parse,
4370 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4371 GST_TIME_ARGS (ltime));
4372 GST_LOG_OBJECT (parse,
4373 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4374 GST_TIME_ARGS (htime));
4375 if (G_UNLIKELY (time == G_MAXINT64)) {
4377 } else if (G_LIKELY (hpos > lpos)) {
4379 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4382 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4384 /* we check this case once, but not forever, so break loop */
4389 newpos = CLAMP (newpos, lpos, hpos);
4390 GST_LOG_OBJECT (parse,
4391 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4392 GST_TIME_ARGS (time), newpos);
4394 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4395 if (ret == GST_FLOW_EOS) {
4396 /* heuristic HACK */
4397 hpos = MAX (lpos, hpos - chunk);
4399 } else if (ret != GST_FLOW_OK) {
4403 if (newtime == -1 || newpos == -1) {
4404 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4408 if (G_UNLIKELY (time == G_MAXINT64)) {
4411 if (GST_CLOCK_TIME_IS_VALID (dur))
4414 } else if (newtime > time) {
4416 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4418 } else if (newtime + tolerance > time) {
4419 /* close enough undershoot */
4423 } else if (newtime < ltime) {
4424 /* so a position beyond lpos resulted in earlier time than ltime ... */
4425 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4428 /* undershoot too far */
4429 newpos += newpos == lpos ? chunk : 0;
4430 lpos = CLAMP (newpos, lpos, hpos);
4436 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4437 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4442 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4443 gboolean before, GstClockTime * _ts)
4445 gint64 bytes = 0, ts = 0;
4446 GstIndexEntry *entry = NULL;
4448 if (time == GST_CLOCK_TIME_NONE) {
4454 GST_BASE_PARSE_INDEX_LOCK (parse);
4455 if (parse->priv->index) {
4456 /* Let's check if we have an index entry for that time */
4457 entry = gst_index_get_assoc_entry (parse->priv->index,
4458 parse->priv->index_id,
4459 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4460 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4464 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4465 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4467 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4468 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4469 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4471 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4472 GST_TIME_ARGS (time));
4475 ts = GST_CLOCK_TIME_NONE;
4478 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4487 /* returns TRUE if seek succeeded */
4489 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4494 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4495 gboolean flush, update, res = TRUE, accurate;
4496 gint64 start, stop, seekpos, seekstop;
4497 GstSegment seeksegment = { 0, };
4498 GstClockTime start_ts;
4500 GstEvent *segment_event;
4502 /* try upstream first, unless we're driving the streaming thread ourselves */
4503 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4504 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4509 gst_event_parse_seek (event, &rate, &format, &flags,
4510 &start_type, &start, &stop_type, &stop);
4511 seqnum = gst_event_get_seqnum (event);
4513 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4514 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4515 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4516 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4518 /* we can only handle TIME, so check if subclass can convert
4519 * to TIME format if it's some other format (such as DEFAULT) */
4520 if (format != GST_FORMAT_TIME) {
4521 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4522 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4524 goto no_convert_to_time;
4526 GST_INFO_OBJECT (parse, "converted %s format to start time "
4527 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4528 gst_format_get_name (format), GST_TIME_ARGS (start),
4529 GST_TIME_ARGS (stop));
4531 format = GST_FORMAT_TIME;
4534 /* no negative rates in push mode (unless upstream takes care of that, but
4535 * we've already tried upstream and it didn't handle the seek request) */
4536 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4539 if (start_type != GST_SEEK_TYPE_SET ||
4540 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4543 /* get flush flag */
4544 flush = flags & GST_SEEK_FLAG_FLUSH;
4546 /* copy segment, we need this because we still need the old
4547 * segment when we close the current segment. */
4548 gst_segment_copy_into (&parse->segment, &seeksegment);
4550 GST_DEBUG_OBJECT (parse, "configuring seek");
4551 gst_segment_do_seek (&seeksegment, rate, format, flags,
4552 start_type, start, stop_type, stop, &update);
4554 /* accurate seeking implies seek tables are used to obtain position,
4555 * and the requested segment is maintained exactly, not adjusted any way */
4556 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4558 /* maybe we can be accurate for (almost) free */
4559 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4560 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4561 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4566 GstClockTime startpos;
4568 startpos = seeksegment.position;
4572 /* accurate requested, so ... seek a bit before target */
4573 if (startpos < parse->priv->lead_in_ts)
4576 startpos -= parse->priv->lead_in_ts;
4578 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4579 seeksegment.stop = seeksegment.start + seeksegment.duration;
4581 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4582 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4586 start_ts = seeksegment.position;
4590 if (seeksegment.stop == -1 && seeksegment.duration != -1)
4591 seeksegment.stop = seeksegment.start + seeksegment.duration;
4593 if (!gst_base_parse_convert (parse, format, start_ts,
4594 GST_FORMAT_BYTES, &seekpos))
4595 goto convert_failed;
4596 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4597 GST_FORMAT_BYTES, &seekstop))
4598 goto convert_failed;
4601 GST_DEBUG_OBJECT (parse,
4602 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4604 GST_DEBUG_OBJECT (parse,
4605 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4606 seeksegment.stop, seekstop);
4608 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4611 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4614 if (parse->srcpad) {
4615 GstEvent *fevent = gst_event_new_flush_start ();
4616 GST_DEBUG_OBJECT (parse, "sending flush start");
4618 gst_event_set_seqnum (fevent, seqnum);
4620 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4621 /* unlock upstream pull_range */
4622 gst_pad_push_event (parse->sinkpad, fevent);
4625 gst_pad_pause_task (parse->sinkpad);
4628 /* we should now be able to grab the streaming thread because we stopped it
4629 * with the above flush/pause code */
4630 GST_PAD_STREAM_LOCK (parse->sinkpad);
4632 /* save current position */
4633 last_stop = parse->segment.position;
4634 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4637 /* now commit to new position */
4639 /* prepare for streaming again */
4641 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4642 GST_DEBUG_OBJECT (parse, "sending flush stop");
4643 gst_event_set_seqnum (fevent, seqnum);
4644 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4645 gst_pad_push_event (parse->sinkpad, fevent);
4646 gst_base_parse_clear_queues (parse);
4648 /* keep track of our position */
4649 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4650 seeksegment.format, parse->segment.position);
4653 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4655 /* store the newsegment event so it can be sent from the streaming thread. */
4656 /* This will be sent later in _loop() */
4657 segment_event = gst_event_new_segment (&parse->segment);
4658 gst_event_set_seqnum (segment_event, seqnum);
4659 parse->priv->pending_events =
4660 g_list_prepend (parse->priv->pending_events, segment_event);
4662 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4663 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4664 ", time = %" GST_TIME_FORMAT, format,
4665 GST_TIME_ARGS (parse->segment.start),
4666 GST_TIME_ARGS (parse->segment.stop),
4667 GST_TIME_ARGS (parse->segment.time));
4669 /* one last chance in pull mode to stay accurate;
4670 * maybe scan and subclass can find where to go */
4673 GstClockTime ts = seeksegment.position;
4675 gst_base_parse_locate_time (parse, &ts, &scanpos);
4679 /* running collected index now consists of several intervals,
4680 * so optimized check no longer possible */
4681 parse->priv->index_last_valid = FALSE;
4682 parse->priv->index_last_offset = 0;
4683 parse->priv->index_last_ts = 0;
4687 /* mark discont if we are going to stream from another position. */
4688 if (seekpos != parse->priv->offset) {
4689 GST_DEBUG_OBJECT (parse,
4690 "mark DISCONT, we did a seek to another position");
4691 parse->priv->offset = seekpos;
4692 parse->priv->last_offset = seekpos;
4693 parse->priv->seen_keyframe = FALSE;
4694 parse->priv->discont = TRUE;
4695 parse->priv->next_dts = start_ts;
4696 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4697 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4698 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4699 parse->priv->sync_offset = seekpos;
4700 parse->priv->exact_position = accurate;
4703 /* Start streaming thread if paused */
4704 gst_pad_start_task (parse->sinkpad,
4705 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4707 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4712 GstEvent *new_event;
4713 GstBaseParseSeek *seek;
4714 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4716 /* The only thing we need to do in PUSH-mode is to send the
4717 seek event (in bytes) to upstream. Segment / flush handling happens
4718 in corresponding src event handlers */
4719 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4720 if (seekstop >= 0 && seekstop <= seekpos)
4722 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4723 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4724 gst_event_set_seqnum (new_event, seqnum);
4726 /* store segment info so its precise details can be reconstructed when
4727 * receiving newsegment;
4728 * this matters for all details when accurate seeking,
4729 * is most useful to preserve NONE stop time otherwise */
4730 seek = g_new0 (GstBaseParseSeek, 1);
4731 seek->segment = seeksegment;
4732 seek->accurate = accurate;
4733 seek->offset = seekpos;
4734 seek->start_ts = start_ts;
4735 GST_OBJECT_LOCK (parse);
4736 /* less optimal, but preserves order */
4737 parse->priv->pending_seeks =
4738 g_slist_append (parse->priv->pending_seeks, seek);
4739 GST_OBJECT_UNLOCK (parse);
4741 res = gst_pad_push_event (parse->sinkpad, new_event);
4744 GST_OBJECT_LOCK (parse);
4745 parse->priv->pending_seeks =
4746 g_slist_remove (parse->priv->pending_seeks, seek);
4747 GST_OBJECT_UNLOCK (parse);
4753 gst_event_unref (event);
4759 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4765 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4771 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4772 "couldn't convert that into TIME format", gst_format_get_name (format));
4778 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4785 gst_base_parse_set_upstream_tags (GstBaseParse * parse, GstTagList * taglist)
4787 if (taglist == parse->priv->upstream_tags)
4790 if (parse->priv->upstream_tags) {
4791 gst_tag_list_unref (parse->priv->upstream_tags);
4792 parse->priv->upstream_tags = NULL;
4795 GST_INFO_OBJECT (parse, "upstream tags: %" GST_PTR_FORMAT, taglist);
4797 if (taglist != NULL)
4798 parse->priv->upstream_tags = gst_tag_list_ref (taglist);
4800 gst_base_parse_check_bitrate_tags (parse);
4805 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4807 GstBaseParse *parse = GST_BASE_PARSE (element);
4809 GST_BASE_PARSE_INDEX_LOCK (parse);
4810 if (parse->priv->index)
4811 gst_object_unref (parse->priv->index);
4813 parse->priv->index = gst_object_ref (index);
4814 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4815 &parse->priv->index_id);
4816 parse->priv->own_index = FALSE;
4818 parse->priv->index = NULL;
4820 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4824 gst_base_parse_get_index (GstElement * element)
4826 GstBaseParse *parse = GST_BASE_PARSE (element);
4827 GstIndex *result = NULL;
4829 GST_BASE_PARSE_INDEX_LOCK (parse);
4830 if (parse->priv->index)
4831 result = gst_object_ref (parse->priv->index);
4832 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4838 static GstStateChangeReturn
4839 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4841 GstBaseParse *parse;
4842 GstStateChangeReturn result;
4844 parse = GST_BASE_PARSE (element);
4846 switch (transition) {
4847 case GST_STATE_CHANGE_READY_TO_PAUSED:
4848 /* If this is our own index destroy it as the
4849 * old entries might be wrong for the new stream */
4850 GST_BASE_PARSE_INDEX_LOCK (parse);
4851 if (parse->priv->own_index) {
4852 gst_object_unref (parse->priv->index);
4853 parse->priv->index = NULL;
4854 parse->priv->own_index = FALSE;
4857 /* If no index was created, generate one */
4858 if (G_UNLIKELY (!parse->priv->index)) {
4859 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4861 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4862 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4863 &parse->priv->index_id);
4864 parse->priv->own_index = TRUE;
4866 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4872 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4874 switch (transition) {
4875 case GST_STATE_CHANGE_PAUSED_TO_READY:
4876 gst_base_parse_reset (parse);
4886 * gst_base_parse_set_ts_at_offset:
4887 * @parse: a #GstBaseParse
4888 * @offset: offset into current buffer
4890 * This function should only be called from a @handle_frame implementation.
4892 * #GstBaseParse creates initial timestamps for frames by using the last
4893 * timestamp seen in the stream before the frame starts. In certain
4894 * cases, the correct timestamps will occur in the stream after the
4895 * start of the frame, but before the start of the actual picture data.
4896 * This function can be used to set the timestamps based on the offset
4897 * into the frame data that the picture starts.
4902 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4904 GstClockTime pts, dts;
4906 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4908 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4909 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4911 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4912 GST_DEBUG_OBJECT (parse,
4913 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4914 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4916 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4917 parse->priv->prev_pts = parse->priv->next_pts = pts;
4919 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts)) {
4920 parse->priv->prev_dts = parse->priv->next_dts = dts;
4921 parse->priv->prev_dts_from_pts = FALSE;
4926 * gst_base_parse_merge_tags:
4927 * @parse: a #GstBaseParse
4928 * @tags: (allow-none): a #GstTagList to merge, or NULL to unset
4929 * previously-set tags
4930 * @mode: the #GstTagMergeMode to use, usually #GST_TAG_MERGE_REPLACE
4932 * Sets the parser subclass's tags and how they should be merged with any
4933 * upstream stream tags. This will override any tags previously-set
4934 * with gst_base_parse_merge_tags().
4936 * Note that this is provided for convenience, and the subclass is
4937 * not required to use this and can still do tag handling on its own.
4942 gst_base_parse_merge_tags (GstBaseParse * parse, GstTagList * tags,
4943 GstTagMergeMode mode)
4945 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4946 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
4947 g_return_if_fail (tags == NULL || mode != GST_TAG_MERGE_UNDEFINED);
4949 GST_OBJECT_LOCK (parse);
4951 if (tags != parse->priv->parser_tags) {
4952 if (parse->priv->parser_tags) {
4953 gst_tag_list_unref (parse->priv->parser_tags);
4954 parse->priv->parser_tags = NULL;
4955 parse->priv->parser_tags_merge_mode = GST_TAG_MERGE_APPEND;
4958 parse->priv->parser_tags = gst_tag_list_ref (tags);
4959 parse->priv->parser_tags_merge_mode = mode;
4962 GST_DEBUG_OBJECT (parse, "setting parser tags to %" GST_PTR_FORMAT
4963 " (mode %d)", tags, parse->priv->parser_tags_merge_mode);
4965 gst_base_parse_check_bitrate_tags (parse);
4966 parse->priv->tags_changed = TRUE;
4969 GST_OBJECT_UNLOCK (parse);