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
223 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
224 #define GST_CAT_DEFAULT gst_base_parse_debug
226 /* Supported formats */
227 static const GstFormat fmtlist[] = {
234 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
235 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
237 struct _GstBaseParsePrivate
244 GstFormat duration_fmt;
245 gint64 estimated_duration;
246 gint64 estimated_drift;
248 guint min_frame_size;
249 gboolean disable_passthrough;
250 gboolean passthrough;
251 gboolean pts_interpolate;
254 gboolean has_timing_info;
255 guint fps_num, fps_den;
256 gint update_interval;
258 guint lead_in, lead_out;
259 GstClockTime lead_in_ts, lead_out_ts;
260 GstClockTime min_latency, max_latency;
268 GstClockTime next_pts;
269 GstClockTime next_dts;
270 GstClockTime prev_pts;
271 GstClockTime prev_dts;
272 GstClockTime frame_duration;
273 gboolean seen_keyframe;
279 guint64 data_bytecount;
280 guint64 acc_duration;
281 GstClockTime first_frame_pts;
282 GstClockTime first_frame_dts;
283 gint64 first_frame_offset;
285 gboolean post_min_bitrate;
286 gboolean post_avg_bitrate;
287 gboolean post_max_bitrate;
291 guint posted_avg_bitrate;
293 /* frames/buffers that are queued and ready to go on OK */
294 GQueue queued_frames;
298 /* index entry storage, either ours or provided */
304 /* seek table entries only maintained if upstream is BYTE seekable */
305 gboolean upstream_seekable;
306 gboolean upstream_has_duration;
307 gint64 upstream_size;
308 GstFormat upstream_format;
309 /* minimum distance between two index entries */
310 GstClockTimeDiff idx_interval;
311 guint64 idx_byte_interval;
312 /* ts and offset of last entry added */
313 GstClockTime index_last_ts;
314 gint64 index_last_offset;
315 gboolean index_last_valid;
317 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
318 gboolean exact_position;
319 /* seek events are temporarily kept to match them with newsegments */
320 GSList *pending_seeks;
322 /* reverse playback */
323 GSList *buffers_pending;
324 GSList *buffers_head;
325 GSList *buffers_queued;
326 GSList *buffers_send;
327 GstClockTime last_pts;
328 GstClockTime last_dts;
331 /* Pending serialized events */
332 GList *pending_events;
334 /* If baseparse has checked the caps to identify if it is
335 * handling video or audio */
336 gboolean checked_media;
338 /* offset of last parsed frame/data */
340 /* force a new frame, regardless of offset */
342 /* whether we are merely scanning for a frame */
344 /* ... and resulting frame, if any */
345 GstBaseParseFrame *scanned_frame;
347 /* TRUE if we're still detecting the format, i.e.
348 * if ::detect() is still called for future buffers */
350 GList *detect_buffers;
351 guint detect_buffers_size;
353 /* if TRUE, a STREAM_START event needs to be pushed */
354 gboolean push_stream_start;
357 typedef struct _GstBaseParseSeek
362 GstClockTime start_ts;
365 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
370 PROP_DISABLE_PASSTHROUGH,
374 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
375 g_mutex_lock (&parse->priv->index_lock);
376 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
377 g_mutex_unlock (&parse->priv->index_lock);
379 static GstElementClass *parent_class = NULL;
381 static void gst_base_parse_class_init (GstBaseParseClass * klass);
382 static void gst_base_parse_init (GstBaseParse * parse,
383 GstBaseParseClass * klass);
386 gst_base_parse_get_type (void)
388 static volatile gsize base_parse_type = 0;
390 if (g_once_init_enter (&base_parse_type)) {
391 static const GTypeInfo base_parse_info = {
392 sizeof (GstBaseParseClass),
393 (GBaseInitFunc) NULL,
394 (GBaseFinalizeFunc) NULL,
395 (GClassInitFunc) gst_base_parse_class_init,
398 sizeof (GstBaseParse),
400 (GInstanceInitFunc) gst_base_parse_init,
404 _type = g_type_register_static (GST_TYPE_ELEMENT,
405 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
406 g_once_init_leave (&base_parse_type, _type);
408 return (GType) base_parse_type;
411 static void gst_base_parse_finalize (GObject * object);
413 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
414 GstStateChange transition);
415 static void gst_base_parse_reset (GstBaseParse * parse);
418 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
419 static GstIndex *gst_base_parse_get_index (GstElement * element);
422 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
424 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
425 GstObject * parent, GstPadMode mode, gboolean active);
426 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
428 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
430 static void gst_base_parse_set_property (GObject * object, guint prop_id,
431 const GValue * value, GParamSpec * pspec);
432 static void gst_base_parse_get_property (GObject * object, guint prop_id,
433 GValue * value, GParamSpec * pspec);
435 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
437 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
440 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
442 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
445 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
447 static void gst_base_parse_loop (GstPad * pad);
449 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
450 GstBaseParseFrame * frame);
452 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
455 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
458 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
460 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
463 static void gst_base_parse_drain (GstBaseParse * parse);
465 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
466 gboolean post_min, gboolean post_avg, gboolean post_max);
468 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
469 GstClockTime time, gboolean before, GstClockTime * _ts);
470 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
471 GstClockTime * _time, gint64 * _offset);
473 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
474 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
476 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
478 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
480 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
482 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
485 gst_base_parse_clear_queues (GstBaseParse * parse)
487 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
488 g_slist_free (parse->priv->buffers_queued);
489 parse->priv->buffers_queued = NULL;
490 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
492 g_slist_free (parse->priv->buffers_pending);
493 parse->priv->buffers_pending = NULL;
494 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
495 g_slist_free (parse->priv->buffers_head);
496 parse->priv->buffers_head = NULL;
497 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
498 g_slist_free (parse->priv->buffers_send);
499 parse->priv->buffers_send = NULL;
501 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
502 g_list_free (parse->priv->detect_buffers);
503 parse->priv->detect_buffers = NULL;
504 parse->priv->detect_buffers_size = 0;
506 g_queue_foreach (&parse->priv->queued_frames,
507 (GFunc) gst_base_parse_frame_free, NULL);
508 g_queue_clear (&parse->priv->queued_frames);
510 gst_buffer_replace (&parse->priv->cache, NULL);
512 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
513 g_list_free (parse->priv->pending_events);
514 parse->priv->pending_events = NULL;
516 parse->priv->checked_media = FALSE;
520 gst_base_parse_finalize (GObject * object)
522 GstBaseParse *parse = GST_BASE_PARSE (object);
524 g_object_unref (parse->priv->adapter);
526 if (parse->priv->cache) {
527 gst_buffer_unref (parse->priv->cache);
528 parse->priv->cache = NULL;
531 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
533 g_list_free (parse->priv->pending_events);
534 parse->priv->pending_events = NULL;
536 if (parse->priv->index) {
537 gst_object_unref (parse->priv->index);
538 parse->priv->index = NULL;
540 g_mutex_clear (&parse->priv->index_lock);
542 gst_base_parse_clear_queues (parse);
544 G_OBJECT_CLASS (parent_class)->finalize (object);
548 gst_base_parse_class_init (GstBaseParseClass * klass)
550 GObjectClass *gobject_class;
551 GstElementClass *gstelement_class;
553 gobject_class = G_OBJECT_CLASS (klass);
554 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
555 parent_class = g_type_class_peek_parent (klass);
557 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
558 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
559 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
562 * GstBaseParse:disable-passthrough:
564 * If set to %TRUE, baseparse will unconditionally force parsing of the
565 * incoming data. This can be required in the rare cases where the incoming
566 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
567 * force validation and parsing of the incoming data.
568 * If set to %FALSE, decision of whether to parse the data or not is up to
569 * the implementation (standard behaviour).
571 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
572 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
573 "Force processing (disables passthrough)",
574 DEFAULT_DISABLE_PASSTHROUGH,
575 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
577 gstelement_class = (GstElementClass *) klass;
578 gstelement_class->change_state =
579 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
582 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
583 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
586 /* Default handlers */
587 klass->sink_event = gst_base_parse_sink_event_default;
588 klass->src_event = gst_base_parse_src_event_default;
589 klass->sink_query = gst_base_parse_sink_query_default;
590 klass->src_query = gst_base_parse_src_query_default;
591 klass->convert = gst_base_parse_convert_default;
593 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
594 "baseparse element");
598 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
600 GstPadTemplate *pad_template;
602 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
604 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
607 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
608 g_return_if_fail (pad_template != NULL);
609 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
610 gst_pad_set_event_function (parse->sinkpad,
611 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
612 gst_pad_set_query_function (parse->sinkpad,
613 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
614 gst_pad_set_chain_function (parse->sinkpad,
615 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
616 gst_pad_set_activate_function (parse->sinkpad,
617 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
618 gst_pad_set_activatemode_function (parse->sinkpad,
619 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
620 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
621 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
623 GST_DEBUG_OBJECT (parse, "sinkpad created");
626 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
627 g_return_if_fail (pad_template != NULL);
628 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
629 gst_pad_set_event_function (parse->srcpad,
630 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
631 gst_pad_set_query_function (parse->srcpad,
632 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
633 gst_pad_use_fixed_caps (parse->srcpad);
634 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
635 GST_DEBUG_OBJECT (parse, "src created");
637 g_queue_init (&parse->priv->queued_frames);
639 parse->priv->adapter = gst_adapter_new ();
641 parse->priv->pad_mode = GST_PAD_MODE_NONE;
643 g_mutex_init (&parse->priv->index_lock);
646 gst_base_parse_reset (parse);
647 GST_DEBUG_OBJECT (parse, "init ok");
649 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
653 gst_base_parse_set_property (GObject * object, guint prop_id,
654 const GValue * value, GParamSpec * pspec)
656 GstBaseParse *parse = GST_BASE_PARSE (object);
659 case PROP_DISABLE_PASSTHROUGH:
660 parse->priv->disable_passthrough = g_value_get_boolean (value);
663 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
669 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
672 GstBaseParse *parse = GST_BASE_PARSE (object);
675 case PROP_DISABLE_PASSTHROUGH:
676 g_value_set_boolean (value, parse->priv->disable_passthrough);
679 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
684 static GstBaseParseFrame *
685 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
687 GstBaseParseFrame *copy;
689 copy = g_slice_dup (GstBaseParseFrame, frame);
690 copy->buffer = gst_buffer_ref (frame->buffer);
691 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
693 GST_TRACE ("copied frame %p -> %p", frame, copy);
699 gst_base_parse_frame_free (GstBaseParseFrame * frame)
701 GST_TRACE ("freeing frame %p", frame);
704 gst_buffer_unref (frame->buffer);
705 frame->buffer = NULL;
708 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
709 g_slice_free (GstBaseParseFrame, frame);
711 memset (frame, 0, sizeof (*frame));
715 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
716 (GBoxedCopyFunc) gst_base_parse_frame_copy,
717 (GBoxedFreeFunc) gst_base_parse_frame_free);
720 * gst_base_parse_frame_init:
721 * @frame: #GstBaseParseFrame.
723 * Sets a #GstBaseParseFrame to initial state. Currently this means
724 * all public fields are zero-ed and a private flag is set to make
725 * sure gst_base_parse_frame_free() only frees the contents but not
726 * the actual frame. Use this function to initialise a #GstBaseParseFrame
727 * allocated on the stack.
730 gst_base_parse_frame_init (GstBaseParseFrame * frame)
732 memset (frame, 0, sizeof (GstBaseParseFrame));
733 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
734 GST_TRACE ("inited frame %p", frame);
738 * gst_base_parse_frame_new:
739 * @buffer: (transfer none): a #GstBuffer
741 * @overhead: number of bytes in this frame which should be counted as
742 * metadata overhead, ie. not used to calculate the average bitrate.
743 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
745 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
746 * elements written in C should usually allocate the frame on the stack and
747 * then use gst_base_parse_frame_init() to initialise it.
749 * Returns: a newly-allocated #GstBaseParseFrame. Free with
750 * gst_base_parse_frame_free() when no longer needed.
753 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
756 GstBaseParseFrame *frame;
758 frame = g_slice_new0 (GstBaseParseFrame);
759 frame->buffer = gst_buffer_ref (buffer);
761 GST_TRACE ("created frame %p", frame);
766 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
769 gst_buffer_replace (&frame->buffer, buf);
773 /* set flags one by one for clarity */
774 if (G_UNLIKELY (parse->priv->drain))
775 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
777 /* losing sync is pretty much a discont (and vice versa), no ? */
778 if (G_UNLIKELY (parse->priv->discont))
779 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
783 gst_base_parse_reset (GstBaseParse * parse)
785 GST_OBJECT_LOCK (parse);
786 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
787 parse->priv->duration = -1;
788 parse->priv->min_frame_size = 1;
789 parse->priv->discont = TRUE;
790 parse->priv->flushing = FALSE;
791 parse->priv->offset = 0;
792 parse->priv->sync_offset = 0;
793 parse->priv->update_interval = -1;
794 parse->priv->fps_num = parse->priv->fps_den = 0;
795 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
796 parse->priv->lead_in = parse->priv->lead_out = 0;
797 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
798 parse->priv->bitrate = 0;
799 parse->priv->framecount = 0;
800 parse->priv->bytecount = 0;
801 parse->priv->acc_duration = 0;
802 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
803 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
804 parse->priv->first_frame_offset = -1;
805 parse->priv->estimated_duration = -1;
806 parse->priv->estimated_drift = 0;
807 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
808 parse->priv->next_dts = 0;
809 parse->priv->syncable = TRUE;
810 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
811 parse->priv->passthrough = FALSE;
812 parse->priv->pts_interpolate = TRUE;
813 parse->priv->infer_ts = TRUE;
814 parse->priv->has_timing_info = FALSE;
815 parse->priv->post_min_bitrate = TRUE;
816 parse->priv->post_avg_bitrate = TRUE;
817 parse->priv->post_max_bitrate = TRUE;
818 parse->priv->min_bitrate = G_MAXUINT;
819 parse->priv->max_bitrate = 0;
820 parse->priv->avg_bitrate = 0;
821 parse->priv->posted_avg_bitrate = 0;
823 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
824 parse->priv->index_last_offset = -1;
825 parse->priv->index_last_valid = TRUE;
826 parse->priv->upstream_seekable = FALSE;
827 parse->priv->upstream_size = 0;
828 parse->priv->upstream_has_duration = FALSE;
829 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
830 parse->priv->idx_interval = 0;
831 parse->priv->idx_byte_interval = 0;
832 parse->priv->exact_position = TRUE;
833 parse->priv->seen_keyframe = FALSE;
834 parse->priv->checked_media = FALSE;
836 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
837 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
838 parse->priv->last_offset = 0;
840 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
842 g_list_free (parse->priv->pending_events);
843 parse->priv->pending_events = NULL;
845 if (parse->priv->cache) {
846 gst_buffer_unref (parse->priv->cache);
847 parse->priv->cache = NULL;
850 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
851 g_slist_free (parse->priv->pending_seeks);
852 parse->priv->pending_seeks = NULL;
854 if (parse->priv->adapter)
855 gst_adapter_clear (parse->priv->adapter);
857 parse->priv->new_frame = TRUE;
859 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
860 g_list_free (parse->priv->detect_buffers);
861 parse->priv->detect_buffers = NULL;
862 parse->priv->detect_buffers_size = 0;
863 GST_OBJECT_UNLOCK (parse);
866 /* gst_base_parse_parse_frame:
867 * @parse: #GstBaseParse.
868 * @buffer: #GstBuffer.
870 * Default callback for parse_frame.
873 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
875 GstBuffer *buffer = frame->buffer;
877 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
878 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
879 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
881 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
882 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
883 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
885 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
886 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
887 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
892 /* gst_base_parse_convert:
893 * @parse: #GstBaseParse.
894 * @src_format: #GstFormat describing the source format.
895 * @src_value: Source value to be converted.
896 * @dest_format: #GstFormat defining the converted format.
897 * @dest_value: Pointer where the conversion result will be put.
899 * Converts using configured "convert" vmethod in #GstBaseParse class.
901 * Returns: %TRUE if conversion was successful.
904 gst_base_parse_convert (GstBaseParse * parse,
905 GstFormat src_format,
906 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
908 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
911 g_return_val_if_fail (dest_value != NULL, FALSE);
916 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
918 #ifndef GST_DISABLE_GST_DEBUG
921 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
922 GST_LOG_OBJECT (parse,
923 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
924 GST_TIME_ARGS (src_value), *dest_value);
925 } else if (dest_format == GST_FORMAT_TIME &&
926 src_format == GST_FORMAT_BYTES) {
927 GST_LOG_OBJECT (parse,
928 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
929 src_value, GST_TIME_ARGS (*dest_value));
931 GST_LOG_OBJECT (parse,
932 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
933 GST_STR_NULL (gst_format_get_name (src_format)),
934 GST_STR_NULL (gst_format_get_name (dest_format)),
935 src_value, *dest_value);
938 GST_DEBUG_OBJECT (parse, "conversion failed");
946 /* gst_base_parse_sink_event:
947 * @pad: #GstPad that received the event.
948 * @event: #GstEvent to be handled.
950 * Handler for sink pad events.
952 * Returns: %TRUE if the event was handled.
955 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
957 GstBaseParse *parse = GST_BASE_PARSE (parent);
958 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
961 ret = bclass->sink_event (parse, event);
967 /* gst_base_parse_sink_event_default:
968 * @parse: #GstBaseParse.
969 * @event: #GstEvent to be handled.
971 * Element-level event handler function.
973 * The event will be unreffed only if it has been handled and this
974 * function returns %TRUE
976 * Returns: %TRUE if the event was handled and not need forwarding.
979 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
981 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
982 gboolean ret = FALSE;
983 gboolean forward_immediate = FALSE;
985 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
986 GST_EVENT_TYPE_NAME (event));
988 switch (GST_EVENT_TYPE (event)) {
993 gst_event_parse_caps (event, &caps);
994 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
996 if (klass->set_sink_caps)
997 ret = klass->set_sink_caps (parse, caps);
1001 /* will send our own caps downstream */
1002 gst_event_unref (event);
1006 case GST_EVENT_SEGMENT:
1008 const GstSegment *in_segment;
1009 GstSegment out_segment;
1010 gint64 offset = 0, next_dts;
1011 guint32 seqnum = gst_event_get_seqnum (event);
1013 gst_event_parse_segment (event, &in_segment);
1014 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1015 out_segment.rate = in_segment->rate;
1016 out_segment.applied_rate = in_segment->applied_rate;
1018 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1020 parse->priv->upstream_format = in_segment->format;
1021 if (in_segment->format == GST_FORMAT_BYTES) {
1022 GstBaseParseSeek *seek = NULL;
1025 /* stop time is allowed to be open-ended, but not start & pos */
1026 offset = in_segment->time;
1028 GST_OBJECT_LOCK (parse);
1029 for (node = parse->priv->pending_seeks; node; node = node->next) {
1030 GstBaseParseSeek *tmp = node->data;
1032 if (tmp->offset == offset) {
1037 parse->priv->pending_seeks =
1038 g_slist_remove (parse->priv->pending_seeks, seek);
1039 GST_OBJECT_UNLOCK (parse);
1042 GST_DEBUG_OBJECT (parse,
1043 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1044 seek->accurate ? " accurate" : "", &seek->segment);
1046 out_segment.start = seek->segment.start;
1047 out_segment.stop = seek->segment.stop;
1048 out_segment.time = seek->segment.start;
1050 next_dts = seek->start_ts;
1051 parse->priv->exact_position = seek->accurate;
1054 /* best attempt convert */
1055 /* as these are only estimates, stop is kept open-ended to avoid
1056 * premature cutting */
1057 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1058 GST_FORMAT_TIME, (gint64 *) & next_dts);
1060 out_segment.start = next_dts;
1061 out_segment.stop = GST_CLOCK_TIME_NONE;
1062 out_segment.time = next_dts;
1064 parse->priv->exact_position = (in_segment->start == 0);
1067 gst_event_unref (event);
1069 event = gst_event_new_segment (&out_segment);
1070 gst_event_set_seqnum (event, seqnum);
1072 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1073 GST_SEGMENT_FORMAT, in_segment);
1075 } else if (in_segment->format != GST_FORMAT_TIME) {
1076 /* Unknown incoming segment format. Output a default open-ended
1078 gst_event_unref (event);
1080 out_segment.start = 0;
1081 out_segment.stop = GST_CLOCK_TIME_NONE;
1082 out_segment.time = 0;
1084 event = gst_event_new_segment (&out_segment);
1085 gst_event_set_seqnum (event, seqnum);
1089 /* not considered BYTE seekable if it is talking to us in TIME,
1090 * whatever else it might claim */
1091 parse->priv->upstream_seekable = FALSE;
1092 next_dts = in_segment->start;
1093 gst_event_copy_segment (event, &out_segment);
1096 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1099 gst_segment_set_newsegment (&parse->segment, update, rate,
1100 applied_rate, format, start, stop, start);
1105 /* save the segment for later, right before we push a new buffer so that
1106 * the caps are fixed and the next linked element can receive
1107 * the segment but finish the current segment */
1108 GST_DEBUG_OBJECT (parse, "draining current segment");
1109 if (in_segment->rate > 0.0)
1110 gst_base_parse_drain (parse);
1112 gst_base_parse_finish_fragment (parse, FALSE);
1113 gst_adapter_clear (parse->priv->adapter);
1115 parse->priv->offset = offset;
1116 parse->priv->sync_offset = offset;
1117 parse->priv->next_dts = next_dts;
1118 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1119 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1120 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1121 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1122 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1123 parse->priv->discont = TRUE;
1124 parse->priv->seen_keyframe = FALSE;
1128 case GST_EVENT_FLUSH_START:
1129 GST_OBJECT_LOCK (parse);
1130 parse->priv->flushing = TRUE;
1131 GST_OBJECT_UNLOCK (parse);
1134 case GST_EVENT_FLUSH_STOP:
1135 gst_adapter_clear (parse->priv->adapter);
1136 gst_base_parse_clear_queues (parse);
1137 parse->priv->flushing = FALSE;
1138 parse->priv->discont = TRUE;
1139 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1140 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1141 parse->priv->new_frame = TRUE;
1143 forward_immediate = TRUE;
1147 if (parse->segment.rate > 0.0)
1148 gst_base_parse_drain (parse);
1150 gst_base_parse_finish_fragment (parse, TRUE);
1152 /* If we STILL have zero frames processed, fire an error */
1153 if (parse->priv->framecount == 0) {
1154 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1155 ("No valid frames found before end of stream"), (NULL));
1157 /* newsegment and other serialized events before eos */
1158 gst_base_parse_push_pending_events (parse);
1160 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1161 /* We've not posted bitrate tags yet - do so now */
1162 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1164 forward_immediate = TRUE;
1166 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1167 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1168 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1169 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1172 const GstStructure *s;
1173 gboolean ev_still_state;
1175 s = gst_event_get_structure (event);
1177 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1178 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1179 if (ev_still_state) {
1180 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1181 if (parse->segment.rate > 0.0)
1182 gst_base_parse_drain (parse);
1184 gst_base_parse_finish_fragment (parse, TRUE);
1186 forward_immediate = TRUE;
1192 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1194 gst_base_parse_push_pending_events (parse);
1196 if (parse->segment.rate > 0.0)
1197 gst_base_parse_drain (parse);
1199 gst_base_parse_finish_fragment (parse, TRUE);
1200 forward_immediate = TRUE;
1204 /* See if any bitrate tags were posted */
1205 gst_base_parse_handle_tag (parse, event);
1208 case GST_EVENT_STREAM_START:
1209 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1210 forward_immediate = TRUE;
1217 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1218 * For EOS this is required because no buffer or serialized event
1219 * will come after EOS and nothing could trigger another
1220 * _finish_frame() call. *
1221 * If the subclass handles sending of EOS manually it can return
1222 * _DROPPED from ::finish() and all other subclasses should have
1223 * decoded/flushed all remaining data before this
1225 * For FLUSH_STOP this is required because it is expected
1226 * to be forwarded immediately and no buffers are queued anyway.
1229 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1230 ret = gst_pad_push_event (parse->srcpad, event);
1232 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1233 parse->priv->pending_events =
1234 g_list_prepend (parse->priv->pending_events, event);
1235 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1240 GST_DEBUG_OBJECT (parse, "event handled");
1246 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1251 pad = GST_BASE_PARSE_SINK_PAD (parse);
1253 switch (GST_QUERY_TYPE (query)) {
1254 case GST_QUERY_CAPS:
1256 GstBaseParseClass *bclass;
1258 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1260 if (bclass->get_sink_caps) {
1261 GstCaps *caps, *filter;
1263 gst_query_parse_caps (query, &filter);
1264 caps = bclass->get_sink_caps (parse, filter);
1265 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1267 gst_query_set_caps_result (query, caps);
1268 gst_caps_unref (caps);
1272 GstCaps *caps, *template_caps, *filter;
1274 gst_query_parse_caps (query, &filter);
1275 template_caps = gst_pad_get_pad_template_caps (pad);
1276 if (filter != NULL) {
1278 gst_caps_intersect_full (filter, template_caps,
1279 GST_CAPS_INTERSECT_FIRST);
1280 gst_caps_unref (template_caps);
1282 caps = template_caps;
1284 gst_query_set_caps_result (query, caps);
1285 gst_caps_unref (caps);
1293 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1302 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1304 GstBaseParseClass *bclass;
1305 GstBaseParse *parse;
1308 parse = GST_BASE_PARSE (parent);
1309 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1311 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1313 if (bclass->sink_query)
1314 ret = bclass->sink_query (parse, query);
1318 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1319 GST_QUERY_TYPE_NAME (query), ret, query);
1325 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1327 GstBaseParseClass *bclass;
1328 GstBaseParse *parse;
1331 parse = GST_BASE_PARSE (parent);
1332 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1334 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1335 GST_QUERY_TYPE_NAME (query), query);
1337 if (bclass->src_query)
1338 ret = bclass->src_query (parse, query);
1342 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1343 GST_QUERY_TYPE_NAME (query), ret, query);
1348 /* gst_base_parse_src_event:
1349 * @pad: #GstPad that received the event.
1350 * @event: #GstEvent that was received.
1352 * Handler for source pad events.
1354 * Returns: %TRUE if the event was handled.
1357 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1359 GstBaseParse *parse;
1360 GstBaseParseClass *bclass;
1361 gboolean ret = TRUE;
1363 parse = GST_BASE_PARSE (parent);
1364 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1366 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1367 GST_EVENT_TYPE_NAME (event));
1369 if (bclass->src_event)
1370 ret = bclass->src_event (parse, event);
1372 gst_event_unref (event);
1378 gst_base_parse_is_seekable (GstBaseParse * parse)
1380 /* FIXME: could do more here, e.g. check index or just send data from 0
1381 * in pull mode and let decoder/sink clip */
1382 return parse->priv->syncable;
1385 /* gst_base_parse_src_event_default:
1386 * @parse: #GstBaseParse.
1387 * @event: #GstEvent that was received.
1389 * Default srcpad event handler.
1391 * Returns: %TRUE if the event was handled and can be dropped.
1394 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1396 gboolean res = FALSE;
1398 switch (GST_EVENT_TYPE (event)) {
1399 case GST_EVENT_SEEK:
1400 if (gst_base_parse_is_seekable (parse))
1401 res = gst_base_parse_handle_seek (parse, event);
1404 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1413 * gst_base_parse_convert_default:
1414 * @parse: #GstBaseParse.
1415 * @src_format: #GstFormat describing the source format.
1416 * @src_value: Source value to be converted.
1417 * @dest_format: #GstFormat defining the converted format.
1418 * @dest_value: Pointer where the conversion result will be put.
1420 * Default implementation of "convert" vmethod in #GstBaseParse class.
1422 * Returns: %TRUE if conversion was successful.
1425 gst_base_parse_convert_default (GstBaseParse * parse,
1426 GstFormat src_format,
1427 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1429 gboolean ret = FALSE;
1430 guint64 bytes, duration;
1432 if (G_UNLIKELY (src_format == dest_format)) {
1433 *dest_value = src_value;
1437 if (G_UNLIKELY (src_value == -1)) {
1442 if (G_UNLIKELY (src_value == 0)) {
1447 /* need at least some frames */
1448 if (!parse->priv->framecount)
1451 duration = parse->priv->acc_duration / GST_MSECOND;
1452 bytes = parse->priv->bytecount;
1454 if (G_UNLIKELY (!duration || !bytes))
1455 goto no_duration_bytes;
1457 if (src_format == GST_FORMAT_BYTES) {
1458 if (dest_format == GST_FORMAT_TIME) {
1459 /* BYTES -> TIME conversion */
1460 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1461 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1462 *dest_value *= GST_MSECOND;
1463 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1464 *dest_value / GST_MSECOND);
1467 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1469 } else if (src_format == GST_FORMAT_TIME) {
1470 if (dest_format == GST_FORMAT_BYTES) {
1471 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1472 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1474 GST_DEBUG_OBJECT (parse,
1475 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1476 src_value / GST_MSECOND, *dest_value);
1479 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1481 } else if (src_format == GST_FORMAT_DEFAULT) {
1482 /* DEFAULT == frame-based */
1483 if (dest_format == GST_FORMAT_TIME) {
1484 GST_DEBUG_OBJECT (parse, "converting default -> time");
1485 if (parse->priv->fps_den) {
1486 *dest_value = gst_util_uint64_scale (src_value,
1487 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1491 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1494 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1501 GST_DEBUG_OBJECT (parse, "no framecount");
1506 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1507 G_GUINT64_FORMAT, duration, bytes);
1514 gst_base_parse_update_duration (GstBaseParse * baseparse)
1517 GstBaseParse *parse;
1519 parse = GST_BASE_PARSE (baseparse);
1521 peer = gst_pad_get_peer (parse->sinkpad);
1523 gboolean qres = FALSE;
1524 gint64 ptot, dest_value;
1526 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1527 gst_object_unref (GST_OBJECT (peer));
1529 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1530 GST_FORMAT_TIME, &dest_value)) {
1532 /* inform if duration changed, but try to avoid spamming */
1533 parse->priv->estimated_drift +=
1534 dest_value - parse->priv->estimated_duration;
1535 if (parse->priv->estimated_drift > GST_SECOND ||
1536 parse->priv->estimated_drift < -GST_SECOND) {
1537 gst_element_post_message (GST_ELEMENT (parse),
1538 gst_message_new_duration_changed (GST_OBJECT (parse)));
1539 parse->priv->estimated_drift = 0;
1541 parse->priv->estimated_duration = dest_value;
1542 GST_LOG_OBJECT (parse,
1543 "updated estimated duration to %" GST_TIME_FORMAT,
1544 GST_TIME_ARGS (dest_value));
1551 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1552 gboolean post_avg, gboolean post_max)
1554 GstTagList *taglist = NULL;
1556 if (post_min && parse->priv->post_min_bitrate) {
1557 taglist = gst_tag_list_new_empty ();
1559 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1560 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1563 if (post_avg && parse->priv->post_avg_bitrate) {
1564 if (taglist == NULL)
1565 taglist = gst_tag_list_new_empty ();
1567 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1568 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1569 parse->priv->avg_bitrate, NULL);
1572 if (post_max && parse->priv->post_max_bitrate) {
1573 if (taglist == NULL)
1574 taglist = gst_tag_list_new_empty ();
1576 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1577 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1580 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1581 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1582 parse->priv->max_bitrate);
1584 if (taglist != NULL) {
1585 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1589 /* gst_base_parse_update_bitrates:
1590 * @parse: #GstBaseParse.
1591 * @buffer: Current frame as a #GstBuffer
1593 * Keeps track of the minimum and maximum bitrates, and also maintains a
1594 * running average bitrate of the stream so far.
1597 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1599 /* Only update the tag on a 10 kbps delta */
1600 static const gint update_threshold = 10000;
1602 guint64 data_len, frame_dur;
1603 gint overhead, frame_bitrate, old_avg_bitrate;
1604 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1605 GstBuffer *buffer = frame->buffer;
1607 overhead = frame->overhead;
1611 data_len = gst_buffer_get_size (buffer) - overhead;
1612 parse->priv->data_bytecount += data_len;
1614 /* duration should be valid by now,
1615 * either set by subclass or maybe based on fps settings */
1616 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1617 /* Calculate duration of a frame from buffer properties */
1618 frame_dur = GST_BUFFER_DURATION (buffer);
1619 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1620 parse->priv->acc_duration;
1623 /* No way to figure out frame duration (is this even possible?) */
1627 /* override if subclass provided bitrate, e.g. metadata based */
1628 if (parse->priv->bitrate) {
1629 parse->priv->avg_bitrate = parse->priv->bitrate;
1630 /* spread this (confirmed) info ASAP */
1631 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1632 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1636 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1640 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1641 parse->priv->avg_bitrate);
1643 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1645 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1646 /* always post all at threshold time */
1647 update_min = update_max = update_avg = TRUE;
1650 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1651 if (frame_bitrate < parse->priv->min_bitrate) {
1652 parse->priv->min_bitrate = frame_bitrate;
1656 if (frame_bitrate > parse->priv->max_bitrate) {
1657 parse->priv->max_bitrate = frame_bitrate;
1661 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1662 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1663 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1668 if ((update_min || update_avg || update_max))
1669 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1676 * gst_base_parse_add_index_entry:
1677 * @parse: #GstBaseParse.
1678 * @offset: offset of entry
1679 * @ts: timestamp associated with offset
1680 * @key: whether entry refers to keyframe
1681 * @force: add entry disregarding sanity checks
1683 * Adds an entry to the index associating @offset to @ts. It is recommended
1684 * to only add keyframe entries. @force allows to bypass checks, such as
1685 * whether the stream is (upstream) seekable, another entry is already "close"
1686 * to the new entry, etc.
1688 * Returns: #gboolean indicating whether entry was added
1691 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1692 GstClockTime ts, gboolean key, gboolean force)
1694 gboolean ret = FALSE;
1695 GstIndexAssociation associations[2];
1697 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1698 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1700 if (G_LIKELY (!force)) {
1702 if (!parse->priv->upstream_seekable) {
1703 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1707 /* FIXME need better helper data structure that handles these issues
1708 * related to ongoing collecting of index entries */
1709 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1711 GST_LOG_OBJECT (parse,
1712 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1713 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1717 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1718 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1719 parse->priv->idx_interval) {
1720 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1721 GST_TIME_ARGS (parse->priv->index_last_ts));
1725 /* if last is not really the last one */
1726 if (!parse->priv->index_last_valid) {
1727 GstClockTime prev_ts;
1729 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1730 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1731 GST_LOG_OBJECT (parse,
1732 "entry too close to existing entry %" GST_TIME_FORMAT,
1733 GST_TIME_ARGS (prev_ts));
1734 parse->priv->index_last_offset = offset;
1735 parse->priv->index_last_ts = ts;
1741 associations[0].format = GST_FORMAT_TIME;
1742 associations[0].value = ts;
1743 associations[1].format = GST_FORMAT_BYTES;
1744 associations[1].value = offset;
1746 /* index might change on-the-fly, although that would be nutty app ... */
1747 GST_BASE_PARSE_INDEX_LOCK (parse);
1748 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1749 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1750 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1751 (const GstIndexAssociation *) &associations);
1752 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1755 parse->priv->index_last_offset = offset;
1756 parse->priv->index_last_ts = ts;
1765 /* check for seekable upstream, above and beyond a mere query */
1767 gst_base_parse_check_seekability (GstBaseParse * parse)
1770 gboolean seekable = FALSE;
1771 gint64 start = -1, stop = -1;
1772 guint idx_interval = 0;
1773 guint64 idx_byte_interval = 0;
1775 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1776 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1777 GST_DEBUG_OBJECT (parse, "seeking query failed");
1781 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1783 /* try harder to query upstream size if we didn't get it the first time */
1784 if (seekable && stop == -1) {
1785 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1786 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1789 /* if upstream doesn't know the size, it's likely that it's not seekable in
1790 * practice even if it technically may be seekable */
1791 if (seekable && (start != 0 || stop <= start)) {
1792 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1796 /* let's not put every single frame into our index */
1798 if (stop < 10 * 1024 * 1024)
1800 else if (stop < 100 * 1024 * 1024)
1803 idx_interval = 1000;
1805 /* ensure that even for large files (e.g. very long audio files), the index
1806 * stays reasonably-size, with some arbitrary limit to the total number of
1808 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1809 GST_DEBUG_OBJECT (parse,
1810 "Limiting index entries to %d, indexing byte interval %"
1811 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1815 gst_query_unref (query);
1817 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1818 G_GUINT64_FORMAT ")", seekable, start, stop);
1819 parse->priv->upstream_seekable = seekable;
1820 parse->priv->upstream_size = seekable ? stop : 0;
1822 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1823 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1824 parse->priv->idx_byte_interval = idx_byte_interval;
1827 /* some misc checks on upstream */
1829 gst_base_parse_check_upstream (GstBaseParse * parse)
1833 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1834 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1835 /* upstream has one, accept it also, and no further updates */
1836 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1837 parse->priv->upstream_has_duration = TRUE;
1840 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1841 parse->priv->upstream_has_duration);
1844 /* checks src caps to determine if dealing with audio or video */
1845 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1847 gst_base_parse_check_media (GstBaseParse * parse)
1852 caps = gst_pad_get_current_caps (parse->srcpad);
1853 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1854 parse->priv->is_video =
1855 g_str_has_prefix (gst_structure_get_name (s), "video");
1857 /* historical default */
1858 parse->priv->is_video = FALSE;
1861 gst_caps_unref (caps);
1863 parse->priv->checked_media = TRUE;
1864 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1867 /* takes ownership of frame */
1869 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1871 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1872 /* frame allocated on the heap, we can just take ownership */
1873 g_queue_push_tail (&parse->priv->queued_frames, frame);
1874 GST_TRACE ("queued frame %p", frame);
1876 GstBaseParseFrame *copy;
1878 /* probably allocated on the stack, must make a proper copy */
1879 copy = gst_base_parse_frame_copy (frame);
1880 g_queue_push_tail (&parse->priv->queued_frames, copy);
1881 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1882 gst_base_parse_frame_free (frame);
1886 /* makes sure that @buf is properly prepared and decorated for passing
1887 * to baseclass, and an equally setup frame is returned setup with @buf.
1888 * Takes ownership of @buf. */
1889 static GstBaseParseFrame *
1890 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1892 GstBaseParseFrame *frame = NULL;
1894 buffer = gst_buffer_make_writable (buffer);
1896 GST_LOG_OBJECT (parse,
1897 "preparing frame at offset %" G_GUINT64_FORMAT
1898 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1899 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1900 gst_buffer_get_size (buffer));
1902 if (parse->priv->discont) {
1903 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1904 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1905 parse->priv->discont = FALSE;
1908 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1910 frame = gst_base_parse_frame_new (buffer, 0, 0);
1912 /* also ensure to update state flags */
1913 gst_base_parse_frame_update (parse, frame, buffer);
1914 gst_buffer_unref (buffer);
1916 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1917 GST_LOG_OBJECT (parse, "marking as new frame");
1918 parse->priv->new_frame = FALSE;
1919 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1922 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1924 /* use default handler to provide initial (upstream) metadata */
1925 gst_base_parse_parse_frame (parse, frame);
1930 /* Wraps buffer in a frame and dispatches to subclass.
1931 * Also manages data skipping and offset handling (including adapter flushing).
1932 * Takes ownership of @buffer */
1933 static GstFlowReturn
1934 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1935 gint * skip, gint * flushed)
1937 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1938 GstBaseParseFrame *frame;
1941 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1943 GST_LOG_OBJECT (parse,
1944 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1945 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1946 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1947 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1948 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1950 /* track what is being flushed during this single round of frame processing */
1951 parse->priv->flushed = 0;
1954 /* make it easy for _finish_frame to pick up input data */
1955 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1956 gst_buffer_ref (buffer);
1957 gst_adapter_push (parse->priv->adapter, buffer);
1960 frame = gst_base_parse_prepare_frame (parse, buffer);
1961 ret = klass->handle_frame (parse, frame, skip);
1963 *flushed = parse->priv->flushed;
1965 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1968 /* subclass can only do one of these, or semantics are too unclear */
1969 g_assert (*skip == 0 || *flushed == 0);
1971 /* track skipping */
1973 GstClockTime pts, dts;
1976 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1977 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1978 /* reverse playback, and no frames found yet, so we are skipping
1979 * the leading part of a fragment, which may form the tail of
1980 * fragment coming later, hopefully subclass skips efficiently ... */
1981 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1982 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1983 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1984 outbuf = gst_buffer_make_writable (outbuf);
1985 GST_BUFFER_PTS (outbuf) = pts;
1986 GST_BUFFER_DTS (outbuf) = dts;
1987 parse->priv->buffers_head =
1988 g_slist_prepend (parse->priv->buffers_head, outbuf);
1991 gst_adapter_flush (parse->priv->adapter, *skip);
1993 if (!parse->priv->discont)
1994 parse->priv->sync_offset = parse->priv->offset;
1995 parse->priv->offset += *skip;
1996 parse->priv->discont = TRUE;
1997 /* check for indefinite skipping */
1998 if (ret == GST_FLOW_OK)
1999 ret = gst_base_parse_check_sync (parse);
2002 parse->priv->offset += *flushed;
2004 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2005 gst_adapter_clear (parse->priv->adapter);
2008 gst_base_parse_frame_free (frame);
2013 /* gst_base_parse_push_pending_events:
2014 * @parse: #GstBaseParse
2016 * Pushes the pending events
2019 gst_base_parse_push_pending_events (GstBaseParse * parse)
2021 if (G_UNLIKELY (parse->priv->pending_events)) {
2022 GList *r = g_list_reverse (parse->priv->pending_events);
2025 parse->priv->pending_events = NULL;
2026 for (l = r; l != NULL; l = l->next) {
2027 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2033 /* gst_base_parse_handle_and_push_frame:
2034 * @parse: #GstBaseParse.
2035 * @klass: #GstBaseParseClass.
2036 * @frame: (transfer full): a #GstBaseParseFrame
2038 * Parses the frame from given buffer and pushes it forward. Also performs
2039 * timestamp handling and checks the segment limits.
2041 * This is called with srcpad STREAM_LOCK held.
2043 * Returns: #GstFlowReturn
2045 static GstFlowReturn
2046 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2047 GstBaseParseFrame * frame)
2052 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2054 buffer = frame->buffer;
2055 offset = frame->offset;
2057 /* check if subclass/format can provide ts.
2058 * If so, that allows and enables extra seek and duration determining options */
2059 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2060 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2061 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2062 parse->priv->first_frame_offset = offset;
2063 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2064 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2065 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2066 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2067 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2068 GST_TIME_ARGS (parse->priv->first_frame_pts),
2069 parse->priv->first_frame_offset);
2070 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2072 GstClockTime last_ts = G_MAXINT64;
2074 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2075 gst_base_parse_locate_time (parse, &last_ts, &off);
2076 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2077 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2080 /* disable further checks */
2081 parse->priv->first_frame_offset = 0;
2085 /* track upstream time if provided, not subclass' internal notion of it */
2086 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2087 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2088 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2091 /* interpolating and no valid pts yet,
2092 * start with dts and carry on from there */
2093 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2094 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2095 parse->priv->next_pts = parse->priv->next_dts;
2097 /* again use default handler to add missing metadata;
2098 * we may have new information on frame properties */
2099 gst_base_parse_parse_frame (parse, frame);
2101 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2102 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2103 parse->priv->next_dts =
2104 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2105 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2106 GstClockTime next_pts =
2107 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2108 if (next_pts >= parse->priv->next_dts)
2109 parse->priv->next_pts = next_pts;
2112 /* we lost track, do not produce bogus time next time around
2113 * (probably means parser subclass has given up on parsing as well) */
2114 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2115 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2118 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2119 GST_BUFFER_PTS_IS_VALID (buffer))
2120 gst_base_parse_add_index_entry (parse, offset,
2121 GST_BUFFER_PTS (buffer),
2122 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2124 /* All OK, push queued frames if there are any */
2125 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2126 GstBaseParseFrame *queued_frame;
2128 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2129 gst_base_parse_push_frame (parse, queued_frame);
2130 gst_base_parse_frame_free (queued_frame);
2134 return gst_base_parse_push_frame (parse, frame);
2138 * gst_base_parse_push_frame:
2139 * @parse: #GstBaseParse.
2140 * @frame: (transfer none): a #GstBaseParseFrame
2142 * Pushes the frame's buffer downstream, sends any pending events and
2143 * does some timestamp and segment handling. Takes ownership of
2144 * frame's buffer, though caller retains ownership of @frame.
2146 * This must be called with sinkpad STREAM_LOCK held.
2148 * Returns: #GstFlowReturn
2151 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2153 GstFlowReturn ret = GST_FLOW_OK;
2154 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2155 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2156 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2160 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2161 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2163 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2165 buffer = frame->buffer;
2167 GST_LOG_OBJECT (parse,
2168 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2169 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2170 gst_buffer_get_size (buffer),
2171 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2172 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2173 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2176 parse->priv->bytecount += frame->size;
2177 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2178 parse->priv->framecount++;
2179 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2180 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2183 /* 0 means disabled */
2184 if (parse->priv->update_interval < 0)
2185 parse->priv->update_interval = 50;
2186 else if (parse->priv->update_interval > 0 &&
2187 (parse->priv->framecount % parse->priv->update_interval) == 0)
2188 gst_base_parse_update_duration (parse);
2190 if (GST_BUFFER_PTS_IS_VALID (buffer))
2191 last_start = last_stop = GST_BUFFER_PTS (buffer);
2192 if (last_start != GST_CLOCK_TIME_NONE
2193 && GST_BUFFER_DURATION_IS_VALID (buffer))
2194 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2196 /* should have caps by now */
2197 if (!gst_pad_has_current_caps (parse->srcpad))
2200 if (G_UNLIKELY (!parse->priv->checked_media)) {
2201 /* have caps; check identity */
2202 gst_base_parse_check_media (parse);
2205 /* Push pending events, including SEGMENT events */
2206 gst_base_parse_push_pending_events (parse);
2208 /* segment adjustment magic; only if we are running the whole show */
2209 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2210 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2211 parse->priv->upstream_seekable)) {
2213 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2214 GST_CLOCK_TIME_IS_VALID (last_start)) {
2215 GstClockTimeDiff diff;
2217 /* only send newsegments with increasing start times,
2218 * otherwise if these go back and forth downstream (sinks) increase
2219 * accumulated time and running_time */
2220 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2221 if (G_UNLIKELY (diff > 2 * GST_SECOND
2222 && last_start > parse->segment.start
2223 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2224 || last_start < parse->segment.stop))) {
2226 GST_DEBUG_OBJECT (parse,
2227 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2228 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2229 "Sending updated SEGMENT events", diff,
2230 GST_TIME_ARGS (parse->segment.position),
2231 GST_TIME_ARGS (last_start));
2233 /* skip gap FIXME */
2234 gst_pad_push_event (parse->srcpad,
2235 gst_event_new_segment (&parse->segment));
2237 parse->segment.position = last_start;
2242 /* update bitrates and optionally post corresponding tags
2243 * (following newsegment) */
2244 gst_base_parse_update_bitrates (parse, frame);
2246 if (klass->pre_push_frame) {
2247 ret = klass->pre_push_frame (parse, frame);
2249 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2252 /* take final ownership of frame buffer */
2253 if (frame->out_buffer) {
2254 buffer = frame->out_buffer;
2255 frame->out_buffer = NULL;
2256 gst_buffer_replace (&frame->buffer, NULL);
2258 buffer = frame->buffer;
2259 frame->buffer = NULL;
2262 /* subclass must play nice */
2263 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2265 size = gst_buffer_get_size (buffer);
2267 parse->priv->seen_keyframe |= parse->priv->is_video &&
2268 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2270 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2271 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2272 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2273 GST_BUFFER_TIMESTAMP (buffer) >
2274 parse->segment.stop + parse->priv->lead_out_ts) {
2275 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2277 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2278 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2279 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2280 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2281 parse->priv->lead_in_ts < parse->segment.start) {
2282 if (parse->priv->seen_keyframe) {
2283 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2286 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2287 ret = GST_BASE_PARSE_FLOW_DROPPED;
2294 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2295 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2296 gst_buffer_unref (buffer);
2298 } else if (ret == GST_FLOW_OK) {
2299 if (parse->segment.rate > 0.0) {
2300 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2302 ret = gst_pad_push (parse->srcpad, buffer);
2303 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2304 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2306 /* in backwards playback mode, if on passthrough we need to push buffers
2307 * directly without accumulating them into the buffers_queued as baseparse
2308 * will never check for a DISCONT while on passthrough and those buffers
2309 * will never be pushed.
2311 * also, as we are on reverse playback, it might be possible that
2312 * passthrough might have just been enabled, so make sure to drain the
2313 * buffers_queued list */
2314 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2315 gst_base_parse_finish_fragment (parse, TRUE);
2316 ret = gst_base_parse_send_buffers (parse);
2319 if (ret == GST_FLOW_OK) {
2320 GST_LOG_OBJECT (parse,
2321 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2322 ret = gst_pad_push (parse->srcpad, buffer);
2323 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2324 gst_flow_get_name (ret));
2326 GST_LOG_OBJECT (parse,
2327 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2328 gst_flow_get_name (ret));
2329 gst_buffer_unref (buffer);
2333 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2335 parse->priv->buffers_queued =
2336 g_slist_prepend (parse->priv->buffers_queued, buffer);
2340 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2341 size, gst_flow_get_name (ret));
2342 gst_buffer_unref (buffer);
2343 /* if we are not sufficiently in control, let upstream decide on EOS */
2344 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2345 (parse->priv->passthrough ||
2346 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2347 !parse->priv->upstream_seekable)))
2351 /* Update current running segment position */
2352 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2353 parse->segment.position < last_stop)
2354 parse->segment.position = last_stop;
2361 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2362 return GST_FLOW_ERROR;
2367 * gst_base_parse_finish_frame:
2368 * @parse: a #GstBaseParse
2369 * @frame: a #GstBaseParseFrame
2370 * @size: consumed input data represented by frame
2372 * Collects parsed data and pushes this downstream.
2373 * Source pad caps must be set when this is called.
2375 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2376 * Otherwise, @size samples will be taken from the input and used for output,
2377 * and the output's metadata (timestamps etc) will be taken as (optionally)
2378 * set by the subclass on @frame's (input) buffer (which is otherwise
2379 * ignored for any but the above purpose/information).
2381 * Note that the latter buffer is invalidated by this call, whereas the
2382 * caller retains ownership of @frame.
2384 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2387 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2390 GstFlowReturn ret = GST_FLOW_OK;
2392 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2393 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2394 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2395 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2398 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2399 "flushing size %d", frame->offset, size);
2401 /* some one-time start-up */
2402 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2403 gst_base_parse_check_seekability (parse);
2404 gst_base_parse_check_upstream (parse);
2407 parse->priv->flushed += size;
2409 if (parse->priv->scanning && frame->buffer) {
2410 if (!parse->priv->scanned_frame) {
2411 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2416 /* either PUSH or PULL mode arranges for adapter data */
2417 /* ensure output buffer */
2418 if (!frame->out_buffer) {
2419 GstBuffer *src, *dest;
2421 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2422 dest = frame->out_buffer;
2423 src = frame->buffer;
2424 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2425 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2426 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2427 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2428 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2429 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2431 gst_adapter_flush (parse->priv->adapter, size);
2434 /* use as input for subsequent processing */
2435 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2436 gst_buffer_unref (frame->out_buffer);
2437 frame->out_buffer = NULL;
2439 /* mark input size consumed */
2442 /* subclass might queue frames/data internally if it needs more
2443 * frames to decide on the format, or might request us to queue here. */
2444 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2445 gst_buffer_replace (&frame->buffer, NULL);
2447 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2448 GstBaseParseFrame *copy;
2450 copy = gst_base_parse_frame_copy (frame);
2451 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2452 gst_base_parse_queue_frame (parse, copy);
2456 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2462 /* gst_base_parse_drain:
2464 * Drains the adapter until it is empty. It decreases the min_frame_size to
2465 * match the current adapter size and calls chain method until the adapter
2466 * is emptied or chain returns with error.
2469 gst_base_parse_drain (GstBaseParse * parse)
2473 GST_DEBUG_OBJECT (parse, "draining");
2474 parse->priv->drain = TRUE;
2477 avail = gst_adapter_available (parse->priv->adapter);
2481 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2482 NULL) != GST_FLOW_OK) {
2486 /* nothing changed, maybe due to truncated frame; break infinite loop */
2487 if (avail == gst_adapter_available (parse->priv->adapter)) {
2488 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2489 gst_adapter_clear (parse->priv->adapter);
2493 parse->priv->drain = FALSE;
2496 /* gst_base_parse_send_buffers
2498 * Sends buffers collected in send_buffers downstream, and ensures that list
2499 * is empty at the end (errors or not).
2501 static GstFlowReturn
2502 gst_base_parse_send_buffers (GstBaseParse * parse)
2504 GSList *send = NULL;
2506 GstFlowReturn ret = GST_FLOW_OK;
2507 gboolean first = TRUE;
2509 send = parse->priv->buffers_send;
2513 buf = GST_BUFFER_CAST (send->data);
2514 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2515 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2516 ", offset %" G_GINT64_FORMAT, buf,
2517 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2518 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2519 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2521 /* Make sure the first buffer is always DISCONT. If we split
2522 * GOPs inside the parser this is otherwise not guaranteed */
2524 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2528 /* iterate output queue an push downstream */
2529 ret = gst_pad_push (parse->srcpad, buf);
2530 send = g_slist_delete_link (send, send);
2532 /* clear any leftover if error */
2533 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2535 buf = GST_BUFFER_CAST (send->data);
2536 gst_buffer_unref (buf);
2537 send = g_slist_delete_link (send, send);
2542 parse->priv->buffers_send = send;
2547 /* gst_base_parse_start_fragment:
2549 * Prepares for processing a reverse playback (forward) fragment
2550 * by (re)setting proper state variables.
2552 static GstFlowReturn
2553 gst_base_parse_start_fragment (GstBaseParse * parse)
2555 GST_LOG_OBJECT (parse, "starting fragment");
2557 /* invalidate so no fall-back timestamping is performed;
2558 * ok if taken from subclass or upstream */
2559 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2560 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2561 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2562 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2563 /* prevent it hanging around stop all the time */
2564 parse->segment.position = GST_CLOCK_TIME_NONE;
2566 parse->priv->discont = TRUE;
2568 /* head of previous fragment is now pending tail of current fragment */
2569 parse->priv->buffers_pending = parse->priv->buffers_head;
2570 parse->priv->buffers_head = NULL;
2576 /* gst_base_parse_finish_fragment:
2578 * Processes a reverse playback (forward) fragment:
2579 * - append head of last fragment that was skipped to current fragment data
2580 * - drain the resulting current fragment data (i.e. repeated chain)
2581 * - add time/duration (if needed) to frames queued by chain
2582 * - push queued data
2584 static GstFlowReturn
2585 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2588 GstFlowReturn ret = GST_FLOW_OK;
2589 gboolean seen_key = FALSE, seen_delta = FALSE;
2591 GST_LOG_OBJECT (parse, "finishing fragment");
2594 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2595 while (parse->priv->buffers_pending) {
2596 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2598 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2599 gst_buffer_get_size (buf));
2600 gst_adapter_push (parse->priv->adapter, buf);
2602 GST_LOG_OBJECT (parse, "discarding head buffer");
2603 gst_buffer_unref (buf);
2605 parse->priv->buffers_pending =
2606 g_slist_delete_link (parse->priv->buffers_pending,
2607 parse->priv->buffers_pending);
2610 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2611 /* initial skipped data is added to buffers_pending */
2612 gst_base_parse_drain (parse);
2614 if (parse->priv->buffers_send) {
2615 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2616 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2619 /* add metadata (if needed to queued buffers */
2620 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2621 GST_TIME_ARGS (parse->priv->last_pts));
2622 while (parse->priv->buffers_queued) {
2623 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2625 /* no touching if upstream or parsing provided time */
2626 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2627 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2628 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2629 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2630 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2631 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2632 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2634 parse->priv->last_pts = 0;
2635 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2636 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2637 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2639 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2640 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2641 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2643 parse->priv->last_dts = 0;
2644 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2645 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2646 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2649 /* no idea, very bad */
2650 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2653 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2654 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2656 /* reverse order for ascending sending */
2657 /* send downstream at keyframe not preceded by a keyframe
2658 * (e.g. that should identify start of collection of IDR nals) */
2659 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2661 ret = gst_base_parse_send_buffers (parse);
2662 /* if a problem, throw all to sending */
2663 if (ret != GST_FLOW_OK) {
2664 parse->priv->buffers_send =
2665 g_slist_reverse (parse->priv->buffers_queued);
2666 parse->priv->buffers_queued = NULL;
2676 parse->priv->buffers_send =
2677 g_slist_prepend (parse->priv->buffers_send, buf);
2678 parse->priv->buffers_queued =
2679 g_slist_delete_link (parse->priv->buffers_queued,
2680 parse->priv->buffers_queued);
2683 /* audio may have all marked as keyframe, so arrange to send here. Also
2684 * we might have ended the loop above on a keyframe, in which case we
2686 if (!seen_delta || seen_key)
2687 ret = gst_base_parse_send_buffers (parse);
2689 /* any trailing unused no longer usable (ideally none) */
2690 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2691 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2692 gst_adapter_available (parse->priv->adapter));
2693 gst_adapter_clear (parse->priv->adapter);
2699 /* small helper that checks whether we have been trying to resync too long */
2700 static inline GstFlowReturn
2701 gst_base_parse_check_sync (GstBaseParse * parse)
2703 if (G_UNLIKELY (parse->priv->discont &&
2704 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2705 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2706 ("Failed to parse stream"), (NULL));
2707 return GST_FLOW_ERROR;
2713 static GstFlowReturn
2714 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2716 GstBaseParseClass *bclass;
2717 GstBaseParse *parse;
2718 GstFlowReturn ret = GST_FLOW_OK;
2719 GstBuffer *tmpbuf = NULL;
2724 GstClockTime pts, dts;
2726 parse = GST_BASE_PARSE (parent);
2727 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2729 if (parse->priv->detecting) {
2730 GstBuffer *detect_buf;
2732 if (parse->priv->detect_buffers_size == 0) {
2733 detect_buf = gst_buffer_ref (buffer);
2738 detect_buf = gst_buffer_new ();
2740 for (l = parse->priv->detect_buffers; l; l = l->next) {
2741 gsize tmpsize = gst_buffer_get_size (l->data);
2743 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2744 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2748 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2749 offset, gst_buffer_get_size (buffer));
2752 ret = bclass->detect (parse, detect_buf);
2753 gst_buffer_unref (detect_buf);
2755 if (ret == GST_FLOW_OK) {
2758 /* Detected something */
2759 parse->priv->detecting = FALSE;
2761 for (l = parse->priv->detect_buffers; l; l = l->next) {
2762 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2764 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2765 parent, GST_BUFFER_CAST (l->data));
2767 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2769 g_list_free (parse->priv->detect_buffers);
2770 parse->priv->detect_buffers = NULL;
2771 parse->priv->detect_buffers_size = 0;
2773 if (ret != GST_FLOW_OK) {
2777 /* Handle the current buffer */
2778 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2779 /* Still detecting, append buffer or error out if draining */
2781 if (parse->priv->drain) {
2782 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2783 return GST_FLOW_ERROR;
2784 } else if (parse->priv->flushing) {
2785 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2787 g_list_free (parse->priv->detect_buffers);
2788 parse->priv->detect_buffers = NULL;
2789 parse->priv->detect_buffers_size = 0;
2791 parse->priv->detect_buffers =
2792 g_list_append (parse->priv->detect_buffers, buffer);
2793 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2797 /* Something went wrong, subclass responsible for error reporting */
2801 /* And now handle the current buffer if detection worked */
2804 if (G_LIKELY (buffer)) {
2805 GST_LOG_OBJECT (parse,
2806 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2807 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2808 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2809 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2810 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2812 if (G_UNLIKELY (!parse->priv->disable_passthrough
2813 && parse->priv->passthrough)) {
2814 GstBaseParseFrame frame;
2816 gst_base_parse_frame_init (&frame);
2817 frame.buffer = gst_buffer_make_writable (buffer);
2818 ret = gst_base_parse_push_frame (parse, &frame);
2819 gst_base_parse_frame_free (&frame);
2822 /* upstream feeding us in reverse playback;
2823 * finish previous fragment and start new upon DISCONT */
2824 if (parse->segment.rate < 0.0) {
2825 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2826 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2827 ret = gst_base_parse_finish_fragment (parse, TRUE);
2828 gst_base_parse_start_fragment (parse);
2831 gst_adapter_push (parse->priv->adapter, buffer);
2834 /* Parse and push as many frames as possible */
2835 /* Stop either when adapter is empty or we are flushing */
2836 while (!parse->priv->flushing) {
2839 /* note: if subclass indicates MAX fsize,
2840 * this will not likely be available anyway ... */
2841 min_size = MAX (parse->priv->min_frame_size, fsize);
2842 av = gst_adapter_available (parse->priv->adapter);
2844 if (G_UNLIKELY (parse->priv->drain)) {
2846 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2847 if (G_UNLIKELY (!min_size)) {
2852 /* Collect at least min_frame_size bytes */
2853 if (av < min_size) {
2854 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2858 /* move along with upstream timestamp (if any),
2859 * but interpolate in between */
2860 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2861 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2862 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2863 parse->priv->prev_pts = parse->priv->next_pts = pts;
2865 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2866 parse->priv->prev_dts = parse->priv->next_dts = dts;
2868 /* we can mess with, erm interpolate, timestamps,
2869 * and incoming stuff has PTS but no DTS seen so far,
2870 * then pick up DTS from PTS and hope for the best ... */
2871 if (parse->priv->infer_ts &&
2872 parse->priv->pts_interpolate &&
2873 !GST_CLOCK_TIME_IS_VALID (dts) &&
2874 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
2875 GST_CLOCK_TIME_IS_VALID (pts))
2876 parse->priv->next_dts = pts;
2878 /* always pass all available data */
2879 data = gst_adapter_map (parse->priv->adapter, av);
2880 /* arrange for actual data to be copied if subclass tries to,
2881 * since what is passed is tied to the adapter */
2882 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2883 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2885 /* already inform subclass what timestamps we have planned,
2886 * at least if provided by time-based upstream */
2887 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2888 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
2889 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
2892 /* keep the adapter mapped, so keep track of what has to be flushed */
2893 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2896 /* probably already implicitly unmapped due to adapter operation,
2897 * but for good measure ... */
2898 gst_adapter_unmap (parse->priv->adapter);
2899 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2902 if (skip == 0 && flush == 0) {
2903 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2904 "breaking to get more data");
2910 GST_LOG_OBJECT (parse, "chain leaving");
2914 /* pull @size bytes at current offset,
2915 * i.e. at least try to and possibly return a shorter buffer if near the end */
2916 static GstFlowReturn
2917 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2918 GstBuffer ** buffer)
2920 GstFlowReturn ret = GST_FLOW_OK;
2922 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2924 /* Caching here actually makes much less difference than one would expect.
2925 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2926 if (parse->priv->cache) {
2927 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2928 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2930 if (cache_offset <= parse->priv->offset &&
2931 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2932 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2933 parse->priv->offset - cache_offset, size);
2934 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2937 /* not enough data in the cache, free cache and get a new one */
2938 gst_buffer_unref (parse->priv->cache);
2939 parse->priv->cache = NULL;
2942 /* refill the cache */
2944 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2945 64 * 1024), &parse->priv->cache);
2946 if (ret != GST_FLOW_OK) {
2947 parse->priv->cache = NULL;
2951 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2953 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2955 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2959 /* Not possible to get enough data, try a last time with
2960 * requesting exactly the size we need */
2961 gst_buffer_unref (parse->priv->cache);
2962 parse->priv->cache = NULL;
2964 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2965 &parse->priv->cache);
2967 if (ret != GST_FLOW_OK) {
2968 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2973 if (gst_buffer_get_size (parse->priv->cache) < size) {
2974 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2975 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2976 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2978 *buffer = parse->priv->cache;
2979 parse->priv->cache = NULL;
2985 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2986 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2991 static GstFlowReturn
2992 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2995 GstClockTime ts = 0;
2999 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3000 ", last_offset = %" G_GINT64_FORMAT,
3001 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3003 if (!parse->priv->last_offset
3004 || parse->priv->last_pts <= parse->segment.start) {
3005 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3006 GST_TIME_ARGS (parse->segment.start));
3011 /* last fragment started at last_offset / last_ts;
3012 * seek back 10s capped at 1MB */
3013 if (parse->priv->last_pts >= 10 * GST_SECOND)
3014 ts = parse->priv->last_pts - 10 * GST_SECOND;
3015 /* if we are exact now, we will be more so going backwards */
3016 if (parse->priv->exact_position) {
3017 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3019 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3020 GST_FORMAT_BYTES, &offset)) {
3021 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3024 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3025 parse->priv->last_offset - 1024);
3026 offset = MAX (0, offset);
3028 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3030 parse->priv->offset = offset;
3032 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3034 if (ret != GST_FLOW_OK)
3037 /* offset will increase again as fragment is processed/parsed */
3038 parse->priv->last_offset = offset;
3040 gst_base_parse_start_fragment (parse);
3041 gst_adapter_push (parse->priv->adapter, buffer);
3042 ret = gst_base_parse_finish_fragment (parse, TRUE);
3043 if (ret != GST_FLOW_OK)
3046 /* force previous fragment */
3047 parse->priv->offset = -1;
3054 * pull and scan for next frame starting from current offset
3055 * ajusts sync, drain and offset going along */
3056 static GstFlowReturn
3057 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3060 GstFlowReturn ret = GST_FLOW_OK;
3061 guint fsize, min_size;
3065 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3066 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3068 /* let's make this efficient for all subclass once and for all;
3069 * maybe it does not need this much, but in the latter case, we know we are
3070 * in pull mode here and might as well try to read and supply more anyway
3071 * (so does the buffer caching mechanism) */
3075 min_size = MAX (parse->priv->min_frame_size, fsize);
3077 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3079 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3080 if (ret != GST_FLOW_OK)
3083 /* if we got a short read, inform subclass we are draining leftover
3084 * and no more is to be expected */
3085 if (gst_buffer_get_size (buffer) < min_size) {
3086 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3087 parse->priv->drain = TRUE;
3090 if (parse->priv->detecting) {
3091 ret = klass->detect (parse, buffer);
3092 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3093 /* If draining we error out, otherwise request a buffer
3095 if (parse->priv->drain) {
3096 gst_buffer_unref (buffer);
3097 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3098 return GST_FLOW_ERROR;
3101 gst_buffer_unref (buffer);
3104 } else if (ret != GST_FLOW_OK) {
3105 gst_buffer_unref (buffer);
3106 GST_ERROR_OBJECT (parse, "detect() returned %s",
3107 gst_flow_get_name (ret));
3111 /* Else handle this buffer normally */
3114 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3115 if (ret != GST_FLOW_OK)
3118 /* something flushed means something happened,
3119 * and we should bail out of this loop so as not to occupy
3120 * the task thread indefinitely */
3122 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3125 /* nothing flushed, no skip and draining, so nothing left to do */
3126 if (!skip && parse->priv->drain) {
3127 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3128 "breaking loop and marking EOS");
3132 /* otherwise, get some more data
3133 * note that is checked this does not happen indefinitely */
3135 GST_LOG_OBJECT (parse, "getting some more data");
3138 parse->priv->drain = FALSE;
3145 /* Loop that is used in pull mode to retrieve data from upstream */
3147 gst_base_parse_loop (GstPad * pad)
3149 GstBaseParse *parse;
3150 GstBaseParseClass *klass;
3151 GstFlowReturn ret = GST_FLOW_OK;
3153 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3154 klass = GST_BASE_PARSE_GET_CLASS (parse);
3156 GST_LOG_OBJECT (parse, "Entering parse loop");
3158 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3163 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3166 event = gst_event_new_stream_start (stream_id);
3167 gst_event_set_group_id (event, gst_util_group_id_next ());
3169 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3170 gst_pad_push_event (parse->srcpad, event);
3171 parse->priv->push_stream_start = FALSE;
3175 /* reverse playback:
3176 * first fragment (closest to stop time) is handled normally below,
3177 * then we pull in fragments going backwards */
3178 if (parse->segment.rate < 0.0) {
3179 /* check if we jumped back to a previous fragment,
3180 * which is a post-first fragment */
3181 if (parse->priv->offset < 0) {
3182 ret = gst_base_parse_handle_previous_fragment (parse);
3187 ret = gst_base_parse_scan_frame (parse, klass);
3188 if (ret != GST_FLOW_OK)
3191 /* eat expected eos signalling past segment in reverse playback */
3192 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3193 parse->segment.position >= parse->segment.stop) {
3194 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3195 /* push what was accumulated during loop run */
3196 gst_base_parse_finish_fragment (parse, FALSE);
3197 /* force previous fragment */
3198 parse->priv->offset = -1;
3203 if (ret == GST_FLOW_EOS)
3205 else if (ret != GST_FLOW_OK)
3208 gst_object_unref (parse);
3215 GST_DEBUG_OBJECT (parse, "eos");
3220 gboolean push_eos = FALSE;
3222 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3223 gst_flow_get_name (ret));
3224 gst_pad_pause_task (parse->sinkpad);
3226 if (ret == GST_FLOW_EOS) {
3227 /* handle end-of-stream/segment */
3228 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3231 if ((stop = parse->segment.stop) == -1)
3232 stop = parse->segment.duration;
3234 GST_DEBUG_OBJECT (parse, "sending segment_done");
3236 gst_element_post_message
3237 (GST_ELEMENT_CAST (parse),
3238 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3239 GST_FORMAT_TIME, stop));
3240 gst_pad_push_event (parse->srcpad,
3241 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3243 /* If we STILL have zero frames processed, fire an error */
3244 if (parse->priv->framecount == 0) {
3245 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3246 ("No valid frames found before end of stream"), (NULL));
3250 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3251 /* for fatal errors we post an error message, wrong-state is
3252 * not fatal because it happens due to flushes and only means
3253 * that we should stop now. */
3254 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3255 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3259 /* Push pending events, including SEGMENT events */
3260 gst_base_parse_push_pending_events (parse);
3262 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3264 gst_object_unref (parse);
3269 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3271 GstSchedulingFlags sched_flags;
3272 GstBaseParse *parse;
3276 parse = GST_BASE_PARSE (parent);
3278 GST_DEBUG_OBJECT (parse, "sink activate");
3280 query = gst_query_new_scheduling ();
3281 if (!gst_pad_peer_query (sinkpad, query)) {
3282 gst_query_unref (query);
3283 goto baseparse_push;
3286 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3288 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3289 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3291 gst_query_unref (query);
3294 goto baseparse_push;
3296 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3297 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3298 goto baseparse_push;
3300 parse->priv->push_stream_start = TRUE;
3302 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3307 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3308 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3313 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3315 GstBaseParseClass *klass;
3316 gboolean result = TRUE;
3318 GST_DEBUG_OBJECT (parse, "activate %d", active);
3320 klass = GST_BASE_PARSE_GET_CLASS (parse);
3323 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3324 result = klass->start (parse);
3326 /* If the subclass implements ::detect we want to
3327 * call it for the first buffers now */
3328 parse->priv->detecting = (klass->detect != NULL);
3330 /* We must make sure streaming has finished before resetting things
3331 * and calling the ::stop vfunc */
3332 GST_PAD_STREAM_LOCK (parse->sinkpad);
3333 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3335 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3336 result = klass->stop (parse);
3338 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3340 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3345 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3346 GstPadMode mode, gboolean active)
3349 GstBaseParse *parse;
3351 parse = GST_BASE_PARSE (parent);
3353 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3354 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3356 if (!gst_base_parse_activate (parse, active))
3357 goto activate_failed;
3360 case GST_PAD_MODE_PULL:
3362 parse->priv->pending_events =
3363 g_list_prepend (parse->priv->pending_events,
3364 gst_event_new_segment (&parse->segment));
3367 result = gst_pad_stop_task (pad);
3375 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3377 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3384 GST_DEBUG_OBJECT (parse, "activate failed");
3390 * gst_base_parse_set_duration:
3391 * @parse: #GstBaseParse.
3393 * @duration: duration value.
3394 * @interval: how often to update the duration estimate based on bitrate, or 0.
3396 * Sets the duration of the currently playing media. Subclass can use this
3397 * when it is able to determine duration and/or notices a change in the media
3398 * duration. Alternatively, if @interval is non-zero (default), then stream
3399 * duration is determined based on estimated bitrate, and updated every @interval
3403 gst_base_parse_set_duration (GstBaseParse * parse,
3404 GstFormat fmt, gint64 duration, gint interval)
3406 g_return_if_fail (parse != NULL);
3408 if (parse->priv->upstream_has_duration) {
3409 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3413 if (duration != parse->priv->duration) {
3416 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3417 gst_element_post_message (GST_ELEMENT (parse), m);
3419 /* TODO: what about duration tag? */
3421 parse->priv->duration = duration;
3422 parse->priv->duration_fmt = fmt;
3423 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3424 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3425 if (interval != 0) {
3426 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3430 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3431 parse->priv->update_interval = interval;
3437 * gst_base_parse_set_average_bitrate:
3438 * @parse: #GstBaseParse.
3439 * @bitrate: average bitrate in bits/second
3441 * Optionally sets the average bitrate detected in media (if non-zero),
3442 * e.g. based on metadata, as it will be posted to the application.
3444 * By default, announced average bitrate is estimated. The average bitrate
3445 * is used to estimate the total duration of the stream and to estimate
3446 * a seek position, if there's no index and the format is syncable
3447 * (see gst_base_parse_set_syncable()).
3450 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3452 parse->priv->bitrate = bitrate;
3453 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3457 * gst_base_parse_set_min_frame_size:
3458 * @parse: #GstBaseParse.
3459 * @min_size: Minimum size of the data that this base class should give to
3462 * Subclass can use this function to tell the base class that it needs to
3463 * give at least #min_size buffers.
3466 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3468 g_return_if_fail (parse != NULL);
3470 parse->priv->min_frame_size = min_size;
3471 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3475 * gst_base_parse_set_frame_rate:
3476 * @parse: the #GstBaseParse to set
3477 * @fps_num: frames per second (numerator).
3478 * @fps_den: frames per second (denominator).
3479 * @lead_in: frames needed before a segment for subsequent decode
3480 * @lead_out: frames needed after a segment
3482 * If frames per second is configured, parser can take care of buffer duration
3483 * and timestamping. When performing segment clipping, or seeking to a specific
3484 * location, a corresponding decoder might need an initial @lead_in and a
3485 * following @lead_out number of frames to ensure the desired segment is
3486 * entirely filled upon decoding.
3489 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3490 guint fps_den, guint lead_in, guint lead_out)
3492 g_return_if_fail (parse != NULL);
3494 parse->priv->fps_num = fps_num;
3495 parse->priv->fps_den = fps_den;
3496 if (!fps_num || !fps_den) {
3497 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3499 fps_num = fps_den = 0;
3500 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3501 parse->priv->lead_in = parse->priv->lead_out = 0;
3502 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3504 parse->priv->frame_duration =
3505 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3506 parse->priv->lead_in = lead_in;
3507 parse->priv->lead_out = lead_out;
3508 parse->priv->lead_in_ts =
3509 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3510 parse->priv->lead_out_ts =
3511 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3512 /* aim for about 1.5s to estimate duration */
3513 if (parse->priv->update_interval < 0) {
3514 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3515 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3516 parse->priv->update_interval);
3519 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3520 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3521 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3522 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3523 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3524 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3528 * gst_base_parse_set_has_timing_info:
3529 * @parse: a #GstBaseParse
3530 * @has_timing: whether frames carry timing information
3532 * Set if frames carry timing information which the subclass can (generally)
3533 * parse and provide. In particular, intrinsic (rather than estimated) time
3534 * can be obtained following a seek.
3537 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3539 parse->priv->has_timing_info = has_timing;
3540 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3544 * gst_base_parse_set_syncable:
3545 * @parse: a #GstBaseParse
3546 * @syncable: set if frame starts can be identified
3548 * Set if frame starts can be identified. This is set by default and
3549 * determines whether seeking based on bitrate averages
3550 * is possible for a format/stream.
3553 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3555 parse->priv->syncable = syncable;
3556 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3560 * gst_base_parse_set_passthrough:
3561 * @parse: a #GstBaseParse
3562 * @passthrough: %TRUE if parser should run in passthrough mode
3564 * Set if the nature of the format or configuration does not allow (much)
3565 * parsing, and the parser should operate in passthrough mode (which only
3566 * applies when operating in push mode). That is, incoming buffers are
3567 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3568 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3569 * so subclass can perform as much or as little is appropriate for
3570 * passthrough semantics in @pre_push_frame.
3573 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3575 parse->priv->passthrough = passthrough;
3576 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3580 * gst_base_parse_set_pts_interpolation:
3581 * @parse: a #GstBaseParse
3582 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3584 * By default, the base class will guess PTS timestamps using a simple
3585 * interpolation (previous timestamp + duration), which is incorrect for
3586 * data streams with reordering, where PTS can go backward. Sub-classes
3587 * implementing such formats should disable PTS interpolation.
3590 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3591 gboolean pts_interpolate)
3593 parse->priv->pts_interpolate = pts_interpolate;
3594 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3595 (pts_interpolate) ? "yes" : "no");
3599 * gst_base_parse_set_infer_ts:
3600 * @parse: a #GstBaseParse
3601 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3603 * By default, the base class might try to infer PTS from DTS and vice
3604 * versa. While this is generally correct for audio data, it may not
3605 * be otherwise. Sub-classes implementing such formats should disable
3606 * timestamp inferring.
3609 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3611 parse->priv->infer_ts = infer_ts;
3612 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3616 * gst_base_parse_set_latency:
3617 * @parse: a #GstBaseParse
3618 * @min_latency: minimum parse latency
3619 * @max_latency: maximum parse latency
3621 * Sets the minimum and maximum (which may likely be equal) latency introduced
3622 * by the parsing process. If there is such a latency, which depends on the
3623 * particular parsing of the format, it typically corresponds to 1 frame duration.
3626 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3627 GstClockTime max_latency)
3629 GST_OBJECT_LOCK (parse);
3630 parse->priv->min_latency = min_latency;
3631 parse->priv->max_latency = max_latency;
3632 GST_OBJECT_UNLOCK (parse);
3633 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3634 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3635 GST_TIME_ARGS (max_latency));
3639 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3640 GstClockTime * duration)
3642 gboolean res = FALSE;
3644 g_return_val_if_fail (duration != NULL, FALSE);
3646 *duration = GST_CLOCK_TIME_NONE;
3647 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3648 GST_LOG_OBJECT (parse, "using provided duration");
3649 *duration = parse->priv->duration;
3651 } else if (parse->priv->duration != -1) {
3652 GST_LOG_OBJECT (parse, "converting provided duration");
3653 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3654 parse->priv->duration, format, (gint64 *) duration);
3655 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3656 GST_LOG_OBJECT (parse, "using estimated duration");
3657 *duration = parse->priv->estimated_duration;
3660 GST_LOG_OBJECT (parse, "cannot estimate duration");
3663 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3664 GST_TIME_ARGS (*duration));
3669 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3671 gboolean res = FALSE;
3674 pad = GST_BASE_PARSE_SRC_PAD (parse);
3676 switch (GST_QUERY_TYPE (query)) {
3677 case GST_QUERY_POSITION:
3682 GST_DEBUG_OBJECT (parse, "position query");
3683 gst_query_parse_position (query, &format, NULL);
3685 /* try upstream first */
3686 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3688 /* Fall back on interpreting segment */
3689 GST_OBJECT_LOCK (parse);
3690 if (format == GST_FORMAT_BYTES) {
3691 dest_value = parse->priv->offset;
3693 } else if (format == parse->segment.format &&
3694 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3695 dest_value = gst_segment_to_stream_time (&parse->segment,
3696 parse->segment.format, parse->segment.position);
3699 GST_OBJECT_UNLOCK (parse);
3701 /* no precise result, upstream no idea either, then best estimate */
3702 /* priv->offset is updated in both PUSH/PULL modes */
3703 res = gst_base_parse_convert (parse,
3704 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3707 gst_query_set_position (query, format, dest_value);
3711 case GST_QUERY_DURATION:
3714 GstClockTime duration;
3716 GST_DEBUG_OBJECT (parse, "duration query");
3717 gst_query_parse_duration (query, &format, NULL);
3719 /* consult upstream */
3720 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3722 /* otherwise best estimate from us */
3724 res = gst_base_parse_get_duration (parse, format, &duration);
3726 gst_query_set_duration (query, format, duration);
3730 case GST_QUERY_SEEKING:
3733 GstClockTime duration = GST_CLOCK_TIME_NONE;
3734 gboolean seekable = FALSE;
3736 GST_DEBUG_OBJECT (parse, "seeking query");
3737 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3739 /* consult upstream */
3740 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3742 /* we may be able to help if in TIME */
3743 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3744 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3745 /* already OK if upstream takes care */
3746 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3748 if (!(res && seekable)) {
3749 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3750 || duration == -1) {
3751 /* seekable if we still have a chance to get duration later on */
3753 parse->priv->upstream_seekable && parse->priv->update_interval;
3755 seekable = parse->priv->upstream_seekable;
3756 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3759 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3765 case GST_QUERY_FORMATS:
3766 gst_query_set_formatsv (query, 3, fmtlist);
3769 case GST_QUERY_CONVERT:
3771 GstFormat src_format, dest_format;
3772 gint64 src_value, dest_value;
3774 gst_query_parse_convert (query, &src_format, &src_value,
3775 &dest_format, &dest_value);
3777 res = gst_base_parse_convert (parse, src_format, src_value,
3778 dest_format, &dest_value);
3780 gst_query_set_convert (query, src_format, src_value,
3781 dest_format, dest_value);
3785 case GST_QUERY_LATENCY:
3787 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3789 GstClockTime min_latency, max_latency;
3791 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3792 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3793 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3794 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3796 GST_OBJECT_LOCK (parse);
3797 /* add our latency */
3798 if (min_latency != -1)
3799 min_latency += parse->priv->min_latency;
3800 if (max_latency != -1)
3801 max_latency += parse->priv->max_latency;
3802 GST_OBJECT_UNLOCK (parse);
3804 gst_query_set_latency (query, live, min_latency, max_latency);
3808 case GST_QUERY_SEGMENT:
3813 format = parse->segment.format;
3816 gst_segment_to_stream_time (&parse->segment, format,
3817 parse->segment.start);
3818 if ((stop = parse->segment.stop) == -1)
3819 stop = parse->segment.duration;
3821 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3823 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3828 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3834 /* scans for a cluster start from @pos,
3835 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3836 static GstFlowReturn
3837 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3838 GstClockTime * time, GstClockTime * duration)
3840 GstBaseParseClass *klass;
3842 gboolean orig_drain, orig_discont;
3843 GstFlowReturn ret = GST_FLOW_OK;
3844 GstBuffer *buf = NULL;
3845 GstBaseParseFrame *sframe = NULL;
3847 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3848 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3849 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3851 klass = GST_BASE_PARSE_GET_CLASS (parse);
3853 *time = GST_CLOCK_TIME_NONE;
3854 *duration = GST_CLOCK_TIME_NONE;
3857 orig_offset = parse->priv->offset;
3858 orig_discont = parse->priv->discont;
3859 orig_drain = parse->priv->drain;
3861 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3862 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3864 /* jump elsewhere and locate next frame */
3865 parse->priv->offset = *pos;
3866 /* mark as scanning so frames don't get processed all the way */
3867 parse->priv->scanning = TRUE;
3868 ret = gst_base_parse_scan_frame (parse, klass);
3869 parse->priv->scanning = FALSE;
3870 /* retrieve frame found during scan */
3871 sframe = parse->priv->scanned_frame;
3872 parse->priv->scanned_frame = NULL;
3874 if (ret != GST_FLOW_OK || !sframe)
3877 /* get offset first, subclass parsing might dump other stuff in there */
3878 *pos = sframe->offset;
3879 buf = sframe->buffer;
3882 /* but it should provide proper time */
3883 *time = GST_BUFFER_TIMESTAMP (buf);
3884 *duration = GST_BUFFER_DURATION (buf);
3886 GST_LOG_OBJECT (parse,
3887 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3888 GST_TIME_ARGS (*time), *pos);
3892 gst_base_parse_frame_free (sframe);
3895 parse->priv->offset = orig_offset;
3896 parse->priv->discont = orig_discont;
3897 parse->priv->drain = orig_drain;
3902 /* bisect and scan through file for frame starting before @time,
3903 * returns OK and @time/@offset if found, NONE and/or error otherwise
3904 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3905 static GstFlowReturn
3906 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3909 GstFlowReturn ret = GST_FLOW_OK;
3910 gint64 lpos, hpos, newpos;
3911 GstClockTime time, ltime, htime, newtime, dur;
3912 gboolean cont = TRUE;
3913 const GstClockTime tolerance = TARGET_DIFFERENCE;
3914 const guint chunk = 4 * 1024;
3916 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3917 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3919 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3920 GST_TIME_ARGS (*_time));
3922 /* TODO also make keyframe aware if useful some day */
3937 /* do not know at first */
3939 *_time = GST_CLOCK_TIME_NONE;
3941 /* need initial positions; start and end */
3942 lpos = parse->priv->first_frame_offset;
3943 ltime = parse->priv->first_frame_pts;
3944 /* try other one if no luck */
3945 if (!GST_CLOCK_TIME_IS_VALID (ltime))
3946 ltime = parse->priv->first_frame_dts;
3947 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3948 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3949 return GST_FLOW_ERROR;
3951 hpos = parse->priv->upstream_size;
3953 GST_DEBUG_OBJECT (parse,
3954 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3955 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
3956 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3958 /* check preconditions are satisfied;
3959 * start and end are needed, except for special case where we scan for
3960 * last frame to determine duration */
3961 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3962 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3963 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3967 /* shortcut cases */
3970 } else if (time < ltime + tolerance) {
3974 } else if (time >= htime) {
3980 while (htime > ltime && cont) {
3981 GST_LOG_OBJECT (parse,
3982 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3983 GST_TIME_ARGS (ltime));
3984 GST_LOG_OBJECT (parse,
3985 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3986 GST_TIME_ARGS (htime));
3987 if (G_UNLIKELY (time == G_MAXINT64)) {
3989 } else if (G_LIKELY (hpos > lpos)) {
3991 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3994 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3996 /* we check this case once, but not forever, so break loop */
4001 newpos = CLAMP (newpos, lpos, hpos);
4002 GST_LOG_OBJECT (parse,
4003 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4004 GST_TIME_ARGS (time), newpos);
4006 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4007 if (ret == GST_FLOW_EOS) {
4008 /* heuristic HACK */
4009 hpos = MAX (lpos, hpos - chunk);
4011 } else if (ret != GST_FLOW_OK) {
4015 if (newtime == -1 || newpos == -1) {
4016 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4020 if (G_UNLIKELY (time == G_MAXINT64)) {
4023 if (GST_CLOCK_TIME_IS_VALID (dur))
4026 } else if (newtime > time) {
4028 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4030 } else if (newtime + tolerance > time) {
4031 /* close enough undershoot */
4035 } else if (newtime < ltime) {
4036 /* so a position beyond lpos resulted in earlier time than ltime ... */
4037 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4040 /* undershoot too far */
4041 newpos += newpos == lpos ? chunk : 0;
4042 lpos = CLAMP (newpos, lpos, hpos);
4048 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4049 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4054 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4055 gboolean before, GstClockTime * _ts)
4057 gint64 bytes = 0, ts = 0;
4058 GstIndexEntry *entry = NULL;
4060 if (time == GST_CLOCK_TIME_NONE) {
4066 GST_BASE_PARSE_INDEX_LOCK (parse);
4067 if (parse->priv->index) {
4068 /* Let's check if we have an index entry for that time */
4069 entry = gst_index_get_assoc_entry (parse->priv->index,
4070 parse->priv->index_id,
4071 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4072 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4076 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4077 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4079 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4080 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4081 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4083 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4084 GST_TIME_ARGS (time));
4087 ts = GST_CLOCK_TIME_NONE;
4090 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4099 /* returns TRUE if seek succeeded */
4101 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4106 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4107 gboolean flush, update, res = TRUE, accurate;
4108 gint64 start, stop, seekpos, seekstop;
4109 GstSegment seeksegment = { 0, };
4110 GstClockTime start_ts;
4112 GstEvent *segment_event;
4114 /* try upstream first, unless we're driving the streaming thread ourselves */
4115 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4116 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4121 gst_event_parse_seek (event, &rate, &format, &flags,
4122 &start_type, &start, &stop_type, &stop);
4123 seqnum = gst_event_get_seqnum (event);
4125 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4126 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4127 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4128 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4130 /* we can only handle TIME, so check if subclass can convert
4131 * to TIME format if it's some other format (such as DEFAULT) */
4132 if (format != GST_FORMAT_TIME) {
4133 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4134 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4136 goto no_convert_to_time;
4138 GST_INFO_OBJECT (parse, "converted %s format to start time "
4139 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4140 gst_format_get_name (format), GST_TIME_ARGS (start),
4141 GST_TIME_ARGS (stop));
4143 format = GST_FORMAT_TIME;
4146 /* no negative rates in push mode (unless upstream takes care of that, but
4147 * we've already tried upstream and it didn't handle the seek request) */
4148 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4151 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4152 goto negative_rate_pull_mode;
4154 if (start_type != GST_SEEK_TYPE_SET ||
4155 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4158 /* get flush flag */
4159 flush = flags & GST_SEEK_FLAG_FLUSH;
4161 /* copy segment, we need this because we still need the old
4162 * segment when we close the current segment. */
4163 gst_segment_copy_into (&parse->segment, &seeksegment);
4165 GST_DEBUG_OBJECT (parse, "configuring seek");
4166 gst_segment_do_seek (&seeksegment, rate, format, flags,
4167 start_type, start, stop_type, stop, &update);
4169 /* accurate seeking implies seek tables are used to obtain position,
4170 * and the requested segment is maintained exactly, not adjusted any way */
4171 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4173 /* maybe we can be accurate for (almost) free */
4174 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4175 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4176 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4180 GstClockTime startpos = seeksegment.position;
4182 /* accurate requested, so ... seek a bit before target */
4183 if (startpos < parse->priv->lead_in_ts)
4186 startpos -= parse->priv->lead_in_ts;
4187 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4188 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4191 start_ts = seeksegment.position;
4192 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4193 GST_FORMAT_BYTES, &seekpos))
4194 goto convert_failed;
4195 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4196 GST_FORMAT_BYTES, &seekstop))
4197 goto convert_failed;
4200 GST_DEBUG_OBJECT (parse,
4201 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4203 GST_DEBUG_OBJECT (parse,
4204 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4205 seeksegment.stop, seekstop);
4207 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4210 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4213 if (parse->srcpad) {
4214 GstEvent *fevent = gst_event_new_flush_start ();
4215 GST_DEBUG_OBJECT (parse, "sending flush start");
4217 gst_event_set_seqnum (fevent, seqnum);
4219 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4220 /* unlock upstream pull_range */
4221 gst_pad_push_event (parse->sinkpad, fevent);
4224 gst_pad_pause_task (parse->sinkpad);
4227 /* we should now be able to grab the streaming thread because we stopped it
4228 * with the above flush/pause code */
4229 GST_PAD_STREAM_LOCK (parse->sinkpad);
4231 /* save current position */
4232 last_stop = parse->segment.position;
4233 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4236 /* now commit to new position */
4238 /* prepare for streaming again */
4240 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4241 GST_DEBUG_OBJECT (parse, "sending flush stop");
4242 gst_event_set_seqnum (fevent, seqnum);
4243 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4244 gst_pad_push_event (parse->sinkpad, fevent);
4245 gst_base_parse_clear_queues (parse);
4247 /* keep track of our position */
4248 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4249 seeksegment.format, parse->segment.position);
4252 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4254 /* store the newsegment event so it can be sent from the streaming thread. */
4255 /* This will be sent later in _loop() */
4256 segment_event = gst_event_new_segment (&parse->segment);
4257 gst_event_set_seqnum (segment_event, seqnum);
4258 parse->priv->pending_events =
4259 g_list_prepend (parse->priv->pending_events, segment_event);
4261 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4262 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4263 ", time = %" GST_TIME_FORMAT, format,
4264 GST_TIME_ARGS (parse->segment.start),
4265 GST_TIME_ARGS (parse->segment.stop),
4266 GST_TIME_ARGS (parse->segment.time));
4268 /* one last chance in pull mode to stay accurate;
4269 * maybe scan and subclass can find where to go */
4272 GstClockTime ts = seeksegment.position;
4274 gst_base_parse_locate_time (parse, &ts, &scanpos);
4278 /* running collected index now consists of several intervals,
4279 * so optimized check no longer possible */
4280 parse->priv->index_last_valid = FALSE;
4281 parse->priv->index_last_offset = 0;
4282 parse->priv->index_last_ts = 0;
4286 /* mark discont if we are going to stream from another position. */
4287 if (seekpos != parse->priv->offset) {
4288 GST_DEBUG_OBJECT (parse,
4289 "mark DISCONT, we did a seek to another position");
4290 parse->priv->offset = seekpos;
4291 parse->priv->last_offset = seekpos;
4292 parse->priv->seen_keyframe = FALSE;
4293 parse->priv->discont = TRUE;
4294 parse->priv->next_dts = start_ts;
4295 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4296 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4297 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4298 parse->priv->sync_offset = seekpos;
4299 parse->priv->exact_position = accurate;
4302 /* Start streaming thread if paused */
4303 gst_pad_start_task (parse->sinkpad,
4304 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4306 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4311 GstEvent *new_event;
4312 GstBaseParseSeek *seek;
4313 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4315 /* The only thing we need to do in PUSH-mode is to send the
4316 seek event (in bytes) to upstream. Segment / flush handling happens
4317 in corresponding src event handlers */
4318 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4319 if (seekstop >= 0 && seekstop <= seekpos)
4321 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4322 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4323 gst_event_set_seqnum (new_event, seqnum);
4325 /* store segment info so its precise details can be reconstructed when
4326 * receiving newsegment;
4327 * this matters for all details when accurate seeking,
4328 * is most useful to preserve NONE stop time otherwise */
4329 seek = g_new0 (GstBaseParseSeek, 1);
4330 seek->segment = seeksegment;
4331 seek->accurate = accurate;
4332 seek->offset = seekpos;
4333 seek->start_ts = start_ts;
4334 GST_OBJECT_LOCK (parse);
4335 /* less optimal, but preserves order */
4336 parse->priv->pending_seeks =
4337 g_slist_append (parse->priv->pending_seeks, seek);
4338 GST_OBJECT_UNLOCK (parse);
4340 res = gst_pad_push_event (parse->sinkpad, new_event);
4343 GST_OBJECT_LOCK (parse);
4344 parse->priv->pending_seeks =
4345 g_slist_remove (parse->priv->pending_seeks, seek);
4346 GST_OBJECT_UNLOCK (parse);
4352 gst_event_unref (event);
4356 negative_rate_pull_mode:
4358 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4364 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4370 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4376 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4377 "couldn't convert that into TIME format", gst_format_get_name (format));
4383 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4389 /* Checks if bitrates are available from upstream tags so that we don't
4390 * override them later
4393 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4395 GstTagList *taglist = NULL;
4398 gst_event_parse_tag (event, &taglist);
4400 /* We only care about stream tags here */
4401 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4404 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4405 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4406 parse->priv->post_min_bitrate = FALSE;
4408 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4409 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4410 parse->priv->post_avg_bitrate = FALSE;
4412 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4413 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4414 parse->priv->post_max_bitrate = FALSE;
4420 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4422 GstBaseParse *parse = GST_BASE_PARSE (element);
4424 GST_BASE_PARSE_INDEX_LOCK (parse);
4425 if (parse->priv->index)
4426 gst_object_unref (parse->priv->index);
4428 parse->priv->index = gst_object_ref (index);
4429 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4430 &parse->priv->index_id);
4431 parse->priv->own_index = FALSE;
4433 parse->priv->index = NULL;
4435 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4439 gst_base_parse_get_index (GstElement * element)
4441 GstBaseParse *parse = GST_BASE_PARSE (element);
4442 GstIndex *result = NULL;
4444 GST_BASE_PARSE_INDEX_LOCK (parse);
4445 if (parse->priv->index)
4446 result = gst_object_ref (parse->priv->index);
4447 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4453 static GstStateChangeReturn
4454 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4456 GstBaseParse *parse;
4457 GstStateChangeReturn result;
4459 parse = GST_BASE_PARSE (element);
4461 switch (transition) {
4462 case GST_STATE_CHANGE_READY_TO_PAUSED:
4463 /* If this is our own index destroy it as the
4464 * old entries might be wrong for the new stream */
4465 GST_BASE_PARSE_INDEX_LOCK (parse);
4466 if (parse->priv->own_index) {
4467 gst_object_unref (parse->priv->index);
4468 parse->priv->index = NULL;
4469 parse->priv->own_index = FALSE;
4472 /* If no index was created, generate one */
4473 if (G_UNLIKELY (!parse->priv->index)) {
4474 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4476 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4477 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4478 &parse->priv->index_id);
4479 parse->priv->own_index = TRUE;
4481 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4487 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4489 switch (transition) {
4490 case GST_STATE_CHANGE_PAUSED_TO_READY:
4491 gst_base_parse_reset (parse);
4501 * gst_base_parse_set_ts_at_offset:
4502 * @parse: a #GstBaseParse
4503 * @offset: offset into current buffer
4505 * This function should only be called from a @handle_frame implementation.
4507 * #GstBaseParse creates initial timestamps for frames by using the last
4508 * timestamp seen in the stream before the frame starts. In certain
4509 * cases, the correct timestamps will occur in the stream after the
4510 * start of the frame, but before the start of the actual picture data.
4511 * This function can be used to set the timestamps based on the offset
4512 * into the frame data that the picture starts.
4517 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4519 GstClockTime pts, dts;
4521 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4523 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4524 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4526 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4527 GST_DEBUG_OBJECT (parse,
4528 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4529 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4531 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4532 parse->priv->prev_pts = parse->priv->next_pts = pts;
4534 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4535 parse->priv->prev_dts = parse->priv->next_dts = dts;