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);
1016 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1018 parse->priv->upstream_format = in_segment->format;
1019 if (in_segment->format == GST_FORMAT_BYTES) {
1020 GstBaseParseSeek *seek = NULL;
1023 /* stop time is allowed to be open-ended, but not start & pos */
1024 offset = in_segment->time;
1026 GST_OBJECT_LOCK (parse);
1027 for (node = parse->priv->pending_seeks; node; node = node->next) {
1028 GstBaseParseSeek *tmp = node->data;
1030 if (tmp->offset == offset) {
1035 parse->priv->pending_seeks =
1036 g_slist_remove (parse->priv->pending_seeks, seek);
1037 GST_OBJECT_UNLOCK (parse);
1040 GST_DEBUG_OBJECT (parse,
1041 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1042 seek->accurate ? " accurate" : "", &seek->segment);
1044 out_segment.start = seek->segment.start;
1045 out_segment.stop = seek->segment.stop;
1046 out_segment.time = seek->segment.start;
1048 next_dts = seek->start_ts;
1049 parse->priv->exact_position = seek->accurate;
1052 /* best attempt convert */
1053 /* as these are only estimates, stop is kept open-ended to avoid
1054 * premature cutting */
1055 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1056 GST_FORMAT_TIME, (gint64 *) & next_dts);
1058 out_segment.start = next_dts;
1059 out_segment.stop = GST_CLOCK_TIME_NONE;
1060 out_segment.time = next_dts;
1062 parse->priv->exact_position = (in_segment->start == 0);
1065 gst_event_unref (event);
1067 event = gst_event_new_segment (&out_segment);
1068 gst_event_set_seqnum (event, seqnum);
1070 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1071 GST_SEGMENT_FORMAT, in_segment);
1073 } else if (in_segment->format != GST_FORMAT_TIME) {
1074 /* Unknown incoming segment format. Output a default open-ended
1076 gst_event_unref (event);
1078 out_segment.start = 0;
1079 out_segment.stop = GST_CLOCK_TIME_NONE;
1080 out_segment.time = 0;
1082 event = gst_event_new_segment (&out_segment);
1083 gst_event_set_seqnum (event, seqnum);
1087 /* not considered BYTE seekable if it is talking to us in TIME,
1088 * whatever else it might claim */
1089 parse->priv->upstream_seekable = FALSE;
1090 next_dts = in_segment->start;
1091 gst_event_copy_segment (event, &out_segment);
1094 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1097 gst_segment_set_newsegment (&parse->segment, update, rate,
1098 applied_rate, format, start, stop, start);
1103 /* save the segment for later, right before we push a new buffer so that
1104 * the caps are fixed and the next linked element can receive
1105 * the segment but finish the current segment */
1106 GST_DEBUG_OBJECT (parse, "draining current segment");
1107 if (in_segment->rate > 0.0)
1108 gst_base_parse_drain (parse);
1110 gst_base_parse_finish_fragment (parse, FALSE);
1111 gst_adapter_clear (parse->priv->adapter);
1113 parse->priv->offset = offset;
1114 parse->priv->sync_offset = offset;
1115 parse->priv->next_dts = next_dts;
1116 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1117 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1118 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1119 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1120 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1121 parse->priv->discont = TRUE;
1122 parse->priv->seen_keyframe = FALSE;
1126 case GST_EVENT_FLUSH_START:
1127 GST_OBJECT_LOCK (parse);
1128 parse->priv->flushing = TRUE;
1129 GST_OBJECT_UNLOCK (parse);
1132 case GST_EVENT_FLUSH_STOP:
1133 gst_adapter_clear (parse->priv->adapter);
1134 gst_base_parse_clear_queues (parse);
1135 parse->priv->flushing = FALSE;
1136 parse->priv->discont = TRUE;
1137 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1138 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1139 parse->priv->new_frame = TRUE;
1141 forward_immediate = TRUE;
1145 if (parse->segment.rate > 0.0)
1146 gst_base_parse_drain (parse);
1148 gst_base_parse_finish_fragment (parse, TRUE);
1150 /* If we STILL have zero frames processed, fire an error */
1151 if (parse->priv->framecount == 0) {
1152 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1153 ("No valid frames found before end of stream"), (NULL));
1155 /* newsegment and other serialized events before eos */
1156 gst_base_parse_push_pending_events (parse);
1158 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1159 /* We've not posted bitrate tags yet - do so now */
1160 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1162 forward_immediate = TRUE;
1164 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1165 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1166 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1167 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1170 const GstStructure *s;
1171 gboolean ev_still_state;
1173 s = gst_event_get_structure (event);
1175 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1176 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1177 if (ev_still_state) {
1178 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1179 if (parse->segment.rate > 0.0)
1180 gst_base_parse_drain (parse);
1182 gst_base_parse_finish_fragment (parse, TRUE);
1184 forward_immediate = TRUE;
1190 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1192 gst_base_parse_push_pending_events (parse);
1194 if (parse->segment.rate > 0.0)
1195 gst_base_parse_drain (parse);
1197 gst_base_parse_finish_fragment (parse, TRUE);
1198 forward_immediate = TRUE;
1202 /* See if any bitrate tags were posted */
1203 gst_base_parse_handle_tag (parse, event);
1206 case GST_EVENT_STREAM_START:
1207 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1208 forward_immediate = TRUE;
1215 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1216 * For EOS this is required because no buffer or serialized event
1217 * will come after EOS and nothing could trigger another
1218 * _finish_frame() call. *
1219 * If the subclass handles sending of EOS manually it can return
1220 * _DROPPED from ::finish() and all other subclasses should have
1221 * decoded/flushed all remaining data before this
1223 * For FLUSH_STOP this is required because it is expected
1224 * to be forwarded immediately and no buffers are queued anyway.
1227 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1228 ret = gst_pad_push_event (parse->srcpad, event);
1230 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1231 parse->priv->pending_events =
1232 g_list_prepend (parse->priv->pending_events, event);
1233 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1238 GST_DEBUG_OBJECT (parse, "event handled");
1244 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1249 pad = GST_BASE_PARSE_SINK_PAD (parse);
1251 switch (GST_QUERY_TYPE (query)) {
1252 case GST_QUERY_CAPS:
1254 GstBaseParseClass *bclass;
1256 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1258 if (bclass->get_sink_caps) {
1259 GstCaps *caps, *filter;
1261 gst_query_parse_caps (query, &filter);
1262 caps = bclass->get_sink_caps (parse, filter);
1263 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1265 gst_query_set_caps_result (query, caps);
1266 gst_caps_unref (caps);
1270 GstCaps *caps, *template_caps, *filter;
1272 gst_query_parse_caps (query, &filter);
1273 template_caps = gst_pad_get_pad_template_caps (pad);
1274 if (filter != NULL) {
1276 gst_caps_intersect_full (filter, template_caps,
1277 GST_CAPS_INTERSECT_FIRST);
1278 gst_caps_unref (template_caps);
1280 caps = template_caps;
1282 gst_query_set_caps_result (query, caps);
1283 gst_caps_unref (caps);
1291 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1300 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1302 GstBaseParseClass *bclass;
1303 GstBaseParse *parse;
1306 parse = GST_BASE_PARSE (parent);
1307 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1309 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1311 if (bclass->sink_query)
1312 ret = bclass->sink_query (parse, query);
1316 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1317 GST_QUERY_TYPE_NAME (query), ret, query);
1323 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1325 GstBaseParseClass *bclass;
1326 GstBaseParse *parse;
1329 parse = GST_BASE_PARSE (parent);
1330 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1332 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1333 GST_QUERY_TYPE_NAME (query), query);
1335 if (bclass->src_query)
1336 ret = bclass->src_query (parse, query);
1340 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1341 GST_QUERY_TYPE_NAME (query), ret, query);
1346 /* gst_base_parse_src_event:
1347 * @pad: #GstPad that received the event.
1348 * @event: #GstEvent that was received.
1350 * Handler for source pad events.
1352 * Returns: TRUE if the event was handled.
1355 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1357 GstBaseParse *parse;
1358 GstBaseParseClass *bclass;
1359 gboolean ret = TRUE;
1361 parse = GST_BASE_PARSE (parent);
1362 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1364 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1365 GST_EVENT_TYPE_NAME (event));
1367 if (bclass->src_event)
1368 ret = bclass->src_event (parse, event);
1370 gst_event_unref (event);
1376 gst_base_parse_is_seekable (GstBaseParse * parse)
1378 /* FIXME: could do more here, e.g. check index or just send data from 0
1379 * in pull mode and let decoder/sink clip */
1380 return parse->priv->syncable;
1383 /* gst_base_parse_src_event_default:
1384 * @parse: #GstBaseParse.
1385 * @event: #GstEvent that was received.
1387 * Default srcpad event handler.
1389 * Returns: TRUE if the event was handled and can be dropped.
1392 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1394 gboolean res = FALSE;
1396 switch (GST_EVENT_TYPE (event)) {
1397 case GST_EVENT_SEEK:
1398 if (gst_base_parse_is_seekable (parse))
1399 res = gst_base_parse_handle_seek (parse, event);
1402 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1411 * gst_base_parse_convert_default:
1412 * @parse: #GstBaseParse.
1413 * @src_format: #GstFormat describing the source format.
1414 * @src_value: Source value to be converted.
1415 * @dest_format: #GstFormat defining the converted format.
1416 * @dest_value: Pointer where the conversion result will be put.
1418 * Default implementation of "convert" vmethod in #GstBaseParse class.
1420 * Returns: TRUE if conversion was successful.
1423 gst_base_parse_convert_default (GstBaseParse * parse,
1424 GstFormat src_format,
1425 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1427 gboolean ret = FALSE;
1428 guint64 bytes, duration;
1430 if (G_UNLIKELY (src_format == dest_format)) {
1431 *dest_value = src_value;
1435 if (G_UNLIKELY (src_value == -1)) {
1440 if (G_UNLIKELY (src_value == 0)) {
1445 /* need at least some frames */
1446 if (!parse->priv->framecount)
1449 duration = parse->priv->acc_duration / GST_MSECOND;
1450 bytes = parse->priv->bytecount;
1452 if (G_UNLIKELY (!duration || !bytes))
1453 goto no_duration_bytes;
1455 if (src_format == GST_FORMAT_BYTES) {
1456 if (dest_format == GST_FORMAT_TIME) {
1457 /* BYTES -> TIME conversion */
1458 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1459 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1460 *dest_value *= GST_MSECOND;
1461 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1462 *dest_value / GST_MSECOND);
1465 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1467 } else if (src_format == GST_FORMAT_TIME) {
1468 if (dest_format == GST_FORMAT_BYTES) {
1469 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1470 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1472 GST_DEBUG_OBJECT (parse,
1473 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1474 src_value / GST_MSECOND, *dest_value);
1477 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1479 } else if (src_format == GST_FORMAT_DEFAULT) {
1480 /* DEFAULT == frame-based */
1481 if (dest_format == GST_FORMAT_TIME) {
1482 GST_DEBUG_OBJECT (parse, "converting default -> time");
1483 if (parse->priv->fps_den) {
1484 *dest_value = gst_util_uint64_scale (src_value,
1485 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1489 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1492 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1499 GST_DEBUG_OBJECT (parse, "no framecount");
1504 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1505 G_GUINT64_FORMAT, duration, bytes);
1512 gst_base_parse_update_duration (GstBaseParse * baseparse)
1515 GstBaseParse *parse;
1517 parse = GST_BASE_PARSE (baseparse);
1519 peer = gst_pad_get_peer (parse->sinkpad);
1521 gboolean qres = FALSE;
1522 gint64 ptot, dest_value;
1524 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1525 gst_object_unref (GST_OBJECT (peer));
1527 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1528 GST_FORMAT_TIME, &dest_value)) {
1530 /* inform if duration changed, but try to avoid spamming */
1531 parse->priv->estimated_drift +=
1532 dest_value - parse->priv->estimated_duration;
1533 if (parse->priv->estimated_drift > GST_SECOND ||
1534 parse->priv->estimated_drift < -GST_SECOND) {
1535 gst_element_post_message (GST_ELEMENT (parse),
1536 gst_message_new_duration_changed (GST_OBJECT (parse)));
1537 parse->priv->estimated_drift = 0;
1539 parse->priv->estimated_duration = dest_value;
1540 GST_LOG_OBJECT (parse,
1541 "updated estimated duration to %" GST_TIME_FORMAT,
1542 GST_TIME_ARGS (dest_value));
1549 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1550 gboolean post_avg, gboolean post_max)
1552 GstTagList *taglist = NULL;
1554 if (post_min && parse->priv->post_min_bitrate) {
1555 taglist = gst_tag_list_new_empty ();
1557 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1558 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1561 if (post_avg && parse->priv->post_avg_bitrate) {
1562 if (taglist == NULL)
1563 taglist = gst_tag_list_new_empty ();
1565 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1566 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1567 parse->priv->avg_bitrate, NULL);
1570 if (post_max && parse->priv->post_max_bitrate) {
1571 if (taglist == NULL)
1572 taglist = gst_tag_list_new_empty ();
1574 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1575 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1578 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1579 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1580 parse->priv->max_bitrate);
1582 if (taglist != NULL) {
1583 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1587 /* gst_base_parse_update_bitrates:
1588 * @parse: #GstBaseParse.
1589 * @buffer: Current frame as a #GstBuffer
1591 * Keeps track of the minimum and maximum bitrates, and also maintains a
1592 * running average bitrate of the stream so far.
1595 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1597 /* Only update the tag on a 10 kbps delta */
1598 static const gint update_threshold = 10000;
1600 guint64 data_len, frame_dur;
1601 gint overhead, frame_bitrate, old_avg_bitrate;
1602 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1603 GstBuffer *buffer = frame->buffer;
1605 overhead = frame->overhead;
1609 data_len = gst_buffer_get_size (buffer) - overhead;
1610 parse->priv->data_bytecount += data_len;
1612 /* duration should be valid by now,
1613 * either set by subclass or maybe based on fps settings */
1614 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1615 /* Calculate duration of a frame from buffer properties */
1616 frame_dur = GST_BUFFER_DURATION (buffer);
1617 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1618 parse->priv->acc_duration;
1621 /* No way to figure out frame duration (is this even possible?) */
1625 /* override if subclass provided bitrate, e.g. metadata based */
1626 if (parse->priv->bitrate) {
1627 parse->priv->avg_bitrate = parse->priv->bitrate;
1628 /* spread this (confirmed) info ASAP */
1629 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1630 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1634 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1638 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1639 parse->priv->avg_bitrate);
1641 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1643 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1644 /* always post all at threshold time */
1645 update_min = update_max = update_avg = TRUE;
1648 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1649 if (frame_bitrate < parse->priv->min_bitrate) {
1650 parse->priv->min_bitrate = frame_bitrate;
1654 if (frame_bitrate > parse->priv->max_bitrate) {
1655 parse->priv->max_bitrate = frame_bitrate;
1659 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1660 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1661 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1666 if ((update_min || update_avg || update_max))
1667 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1674 * gst_base_parse_add_index_entry:
1675 * @parse: #GstBaseParse.
1676 * @offset: offset of entry
1677 * @ts: timestamp associated with offset
1678 * @key: whether entry refers to keyframe
1679 * @force: add entry disregarding sanity checks
1681 * Adds an entry to the index associating @offset to @ts. It is recommended
1682 * to only add keyframe entries. @force allows to bypass checks, such as
1683 * whether the stream is (upstream) seekable, another entry is already "close"
1684 * to the new entry, etc.
1686 * Returns: #gboolean indicating whether entry was added
1689 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1690 GstClockTime ts, gboolean key, gboolean force)
1692 gboolean ret = FALSE;
1693 GstIndexAssociation associations[2];
1695 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1696 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1698 if (G_LIKELY (!force)) {
1700 if (!parse->priv->upstream_seekable) {
1701 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1705 /* FIXME need better helper data structure that handles these issues
1706 * related to ongoing collecting of index entries */
1707 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1709 GST_LOG_OBJECT (parse,
1710 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1711 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1715 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1716 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1717 parse->priv->idx_interval) {
1718 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1719 GST_TIME_ARGS (parse->priv->index_last_ts));
1723 /* if last is not really the last one */
1724 if (!parse->priv->index_last_valid) {
1725 GstClockTime prev_ts;
1727 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1728 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1729 GST_LOG_OBJECT (parse,
1730 "entry too close to existing entry %" GST_TIME_FORMAT,
1731 GST_TIME_ARGS (prev_ts));
1732 parse->priv->index_last_offset = offset;
1733 parse->priv->index_last_ts = ts;
1739 associations[0].format = GST_FORMAT_TIME;
1740 associations[0].value = ts;
1741 associations[1].format = GST_FORMAT_BYTES;
1742 associations[1].value = offset;
1744 /* index might change on-the-fly, although that would be nutty app ... */
1745 GST_BASE_PARSE_INDEX_LOCK (parse);
1746 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1747 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1748 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1749 (const GstIndexAssociation *) &associations);
1750 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1753 parse->priv->index_last_offset = offset;
1754 parse->priv->index_last_ts = ts;
1763 /* check for seekable upstream, above and beyond a mere query */
1765 gst_base_parse_check_seekability (GstBaseParse * parse)
1768 gboolean seekable = FALSE;
1769 gint64 start = -1, stop = -1;
1770 guint idx_interval = 0;
1771 guint64 idx_byte_interval = 0;
1773 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1774 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1775 GST_DEBUG_OBJECT (parse, "seeking query failed");
1779 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1781 /* try harder to query upstream size if we didn't get it the first time */
1782 if (seekable && stop == -1) {
1783 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1784 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1787 /* if upstream doesn't know the size, it's likely that it's not seekable in
1788 * practice even if it technically may be seekable */
1789 if (seekable && (start != 0 || stop <= start)) {
1790 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1794 /* let's not put every single frame into our index */
1796 if (stop < 10 * 1024 * 1024)
1798 else if (stop < 100 * 1024 * 1024)
1801 idx_interval = 1000;
1803 /* ensure that even for large files (e.g. very long audio files), the index
1804 * stays reasonably-size, with some arbitrary limit to the total number of
1806 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1807 GST_DEBUG_OBJECT (parse,
1808 "Limiting index entries to %d, indexing byte interval %"
1809 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1813 gst_query_unref (query);
1815 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1816 G_GUINT64_FORMAT ")", seekable, start, stop);
1817 parse->priv->upstream_seekable = seekable;
1818 parse->priv->upstream_size = seekable ? stop : 0;
1820 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1821 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1822 parse->priv->idx_byte_interval = idx_byte_interval;
1825 /* some misc checks on upstream */
1827 gst_base_parse_check_upstream (GstBaseParse * parse)
1831 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1832 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1833 /* upstream has one, accept it also, and no further updates */
1834 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1835 parse->priv->upstream_has_duration = TRUE;
1838 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1839 parse->priv->upstream_has_duration);
1842 /* checks src caps to determine if dealing with audio or video */
1843 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1845 gst_base_parse_check_media (GstBaseParse * parse)
1850 caps = gst_pad_get_current_caps (parse->srcpad);
1851 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1852 parse->priv->is_video =
1853 g_str_has_prefix (gst_structure_get_name (s), "video");
1855 /* historical default */
1856 parse->priv->is_video = FALSE;
1859 gst_caps_unref (caps);
1861 parse->priv->checked_media = TRUE;
1862 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1865 /* takes ownership of frame */
1867 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1869 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1870 /* frame allocated on the heap, we can just take ownership */
1871 g_queue_push_tail (&parse->priv->queued_frames, frame);
1872 GST_TRACE ("queued frame %p", frame);
1874 GstBaseParseFrame *copy;
1876 /* probably allocated on the stack, must make a proper copy */
1877 copy = gst_base_parse_frame_copy (frame);
1878 g_queue_push_tail (&parse->priv->queued_frames, copy);
1879 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1880 gst_base_parse_frame_free (frame);
1884 /* makes sure that @buf is properly prepared and decorated for passing
1885 * to baseclass, and an equally setup frame is returned setup with @buf.
1886 * Takes ownership of @buf. */
1887 static GstBaseParseFrame *
1888 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1890 GstBaseParseFrame *frame = NULL;
1892 buffer = gst_buffer_make_writable (buffer);
1894 GST_LOG_OBJECT (parse,
1895 "preparing frame at offset %" G_GUINT64_FORMAT
1896 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1897 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1898 gst_buffer_get_size (buffer));
1900 if (parse->priv->discont) {
1901 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1902 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1903 parse->priv->discont = FALSE;
1906 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1908 frame = gst_base_parse_frame_new (buffer, 0, 0);
1910 /* also ensure to update state flags */
1911 gst_base_parse_frame_update (parse, frame, buffer);
1912 gst_buffer_unref (buffer);
1914 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1915 GST_LOG_OBJECT (parse, "marking as new frame");
1916 parse->priv->new_frame = FALSE;
1917 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1920 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1922 /* use default handler to provide initial (upstream) metadata */
1923 gst_base_parse_parse_frame (parse, frame);
1928 /* Wraps buffer in a frame and dispatches to subclass.
1929 * Also manages data skipping and offset handling (including adapter flushing).
1930 * Takes ownership of @buffer */
1931 static GstFlowReturn
1932 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1933 gint * skip, gint * flushed)
1935 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1936 GstBaseParseFrame *frame;
1939 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1941 GST_LOG_OBJECT (parse,
1942 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1943 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1944 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1945 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1946 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1948 /* track what is being flushed during this single round of frame processing */
1949 parse->priv->flushed = 0;
1952 /* make it easy for _finish_frame to pick up input data */
1953 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1954 gst_buffer_ref (buffer);
1955 gst_adapter_push (parse->priv->adapter, buffer);
1958 frame = gst_base_parse_prepare_frame (parse, buffer);
1959 ret = klass->handle_frame (parse, frame, skip);
1961 *flushed = parse->priv->flushed;
1963 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1966 /* subclass can only do one of these, or semantics are too unclear */
1967 g_assert (*skip == 0 || *flushed == 0);
1969 /* track skipping */
1971 GstClockTime pts, dts;
1974 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1975 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1976 /* reverse playback, and no frames found yet, so we are skipping
1977 * the leading part of a fragment, which may form the tail of
1978 * fragment coming later, hopefully subclass skips efficiently ... */
1979 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1980 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1981 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1982 outbuf = gst_buffer_make_writable (outbuf);
1983 GST_BUFFER_PTS (outbuf) = pts;
1984 GST_BUFFER_DTS (outbuf) = dts;
1985 parse->priv->buffers_head =
1986 g_slist_prepend (parse->priv->buffers_head, outbuf);
1989 gst_adapter_flush (parse->priv->adapter, *skip);
1991 if (!parse->priv->discont)
1992 parse->priv->sync_offset = parse->priv->offset;
1993 parse->priv->offset += *skip;
1994 parse->priv->discont = TRUE;
1995 /* check for indefinite skipping */
1996 if (ret == GST_FLOW_OK)
1997 ret = gst_base_parse_check_sync (parse);
2000 parse->priv->offset += *flushed;
2002 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2003 gst_adapter_clear (parse->priv->adapter);
2006 gst_base_parse_frame_free (frame);
2011 /* gst_base_parse_push_pending_events:
2012 * @parse: #GstBaseParse
2014 * Pushes the pending events
2017 gst_base_parse_push_pending_events (GstBaseParse * parse)
2019 if (G_UNLIKELY (parse->priv->pending_events)) {
2020 GList *r = g_list_reverse (parse->priv->pending_events);
2023 parse->priv->pending_events = NULL;
2024 for (l = r; l != NULL; l = l->next) {
2025 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2031 /* gst_base_parse_handle_and_push_frame:
2032 * @parse: #GstBaseParse.
2033 * @klass: #GstBaseParseClass.
2034 * @frame: (transfer full): a #GstBaseParseFrame
2036 * Parses the frame from given buffer and pushes it forward. Also performs
2037 * timestamp handling and checks the segment limits.
2039 * This is called with srcpad STREAM_LOCK held.
2041 * Returns: #GstFlowReturn
2043 static GstFlowReturn
2044 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2045 GstBaseParseFrame * frame)
2050 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2052 buffer = frame->buffer;
2053 offset = frame->offset;
2055 /* check if subclass/format can provide ts.
2056 * If so, that allows and enables extra seek and duration determining options */
2057 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2058 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2059 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2060 parse->priv->first_frame_offset = offset;
2061 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2062 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2063 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2064 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2065 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2066 GST_TIME_ARGS (parse->priv->first_frame_pts),
2067 parse->priv->first_frame_offset);
2068 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2070 GstClockTime last_ts = G_MAXINT64;
2072 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2073 gst_base_parse_locate_time (parse, &last_ts, &off);
2074 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2075 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2078 /* disable further checks */
2079 parse->priv->first_frame_offset = 0;
2083 /* track upstream time if provided, not subclass' internal notion of it */
2084 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2085 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2086 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2089 /* interpolating and no valid pts yet,
2090 * start with dts and carry on from there */
2091 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2092 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2093 parse->priv->next_pts = parse->priv->next_dts;
2095 /* again use default handler to add missing metadata;
2096 * we may have new information on frame properties */
2097 gst_base_parse_parse_frame (parse, frame);
2099 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2100 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2101 parse->priv->next_dts =
2102 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2103 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2104 GstClockTime next_pts =
2105 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2106 if (next_pts >= parse->priv->next_dts)
2107 parse->priv->next_pts = next_pts;
2110 /* we lost track, do not produce bogus time next time around
2111 * (probably means parser subclass has given up on parsing as well) */
2112 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2113 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2116 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2117 GST_BUFFER_PTS_IS_VALID (buffer))
2118 gst_base_parse_add_index_entry (parse, offset,
2119 GST_BUFFER_PTS (buffer),
2120 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2122 /* All OK, push queued frames if there are any */
2123 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2124 GstBaseParseFrame *queued_frame;
2126 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2127 gst_base_parse_push_frame (parse, queued_frame);
2128 gst_base_parse_frame_free (queued_frame);
2132 return gst_base_parse_push_frame (parse, frame);
2136 * gst_base_parse_push_frame:
2137 * @parse: #GstBaseParse.
2138 * @frame: (transfer none): a #GstBaseParseFrame
2140 * Pushes the frame's buffer downstream, sends any pending events and
2141 * does some timestamp and segment handling. Takes ownership of
2142 * frame's buffer, though caller retains ownership of @frame.
2144 * This must be called with sinkpad STREAM_LOCK held.
2146 * Returns: #GstFlowReturn
2149 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2151 GstFlowReturn ret = GST_FLOW_OK;
2152 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2153 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2154 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2158 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2159 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2161 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2163 buffer = frame->buffer;
2165 GST_LOG_OBJECT (parse,
2166 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2167 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2168 gst_buffer_get_size (buffer),
2169 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2170 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2171 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2174 parse->priv->bytecount += frame->size;
2175 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2176 parse->priv->framecount++;
2177 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2178 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2181 /* 0 means disabled */
2182 if (parse->priv->update_interval < 0)
2183 parse->priv->update_interval = 50;
2184 else if (parse->priv->update_interval > 0 &&
2185 (parse->priv->framecount % parse->priv->update_interval) == 0)
2186 gst_base_parse_update_duration (parse);
2188 if (GST_BUFFER_PTS_IS_VALID (buffer))
2189 last_start = last_stop = GST_BUFFER_PTS (buffer);
2190 if (last_start != GST_CLOCK_TIME_NONE
2191 && GST_BUFFER_DURATION_IS_VALID (buffer))
2192 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2194 /* should have caps by now */
2195 if (!gst_pad_has_current_caps (parse->srcpad))
2198 if (G_UNLIKELY (!parse->priv->checked_media)) {
2199 /* have caps; check identity */
2200 gst_base_parse_check_media (parse);
2203 /* Push pending events, including SEGMENT events */
2204 gst_base_parse_push_pending_events (parse);
2206 /* segment adjustment magic; only if we are running the whole show */
2207 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2208 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2209 parse->priv->upstream_seekable)) {
2211 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2212 GST_CLOCK_TIME_IS_VALID (last_start)) {
2213 GstClockTimeDiff diff;
2215 /* only send newsegments with increasing start times,
2216 * otherwise if these go back and forth downstream (sinks) increase
2217 * accumulated time and running_time */
2218 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2219 if (G_UNLIKELY (diff > 2 * GST_SECOND
2220 && last_start > parse->segment.start
2221 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2222 || last_start < parse->segment.stop))) {
2224 GST_DEBUG_OBJECT (parse,
2225 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2226 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2227 "Sending updated SEGMENT events", diff,
2228 GST_TIME_ARGS (parse->segment.position),
2229 GST_TIME_ARGS (last_start));
2231 /* skip gap FIXME */
2232 gst_pad_push_event (parse->srcpad,
2233 gst_event_new_segment (&parse->segment));
2235 parse->segment.position = last_start;
2240 /* update bitrates and optionally post corresponding tags
2241 * (following newsegment) */
2242 gst_base_parse_update_bitrates (parse, frame);
2244 if (klass->pre_push_frame) {
2245 ret = klass->pre_push_frame (parse, frame);
2247 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2250 /* take final ownership of frame buffer */
2251 if (frame->out_buffer) {
2252 buffer = frame->out_buffer;
2253 frame->out_buffer = NULL;
2254 gst_buffer_replace (&frame->buffer, NULL);
2256 buffer = frame->buffer;
2257 frame->buffer = NULL;
2260 /* subclass must play nice */
2261 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2263 size = gst_buffer_get_size (buffer);
2265 parse->priv->seen_keyframe |= parse->priv->is_video &&
2266 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2268 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2269 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2270 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2271 GST_BUFFER_TIMESTAMP (buffer) >
2272 parse->segment.stop + parse->priv->lead_out_ts) {
2273 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2275 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2276 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2277 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2278 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2279 parse->priv->lead_in_ts < parse->segment.start) {
2280 if (parse->priv->seen_keyframe) {
2281 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2284 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2285 ret = GST_BASE_PARSE_FLOW_DROPPED;
2292 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2293 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2294 gst_buffer_unref (buffer);
2296 } else if (ret == GST_FLOW_OK) {
2297 if (parse->segment.rate > 0.0) {
2298 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2300 ret = gst_pad_push (parse->srcpad, buffer);
2301 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2302 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2304 /* in backwards playback mode, if on passthrough we need to push buffers
2305 * directly without accumulating them into the buffers_queued as baseparse
2306 * will never check for a DISCONT while on passthrough and those buffers
2307 * will never be pushed.
2309 * also, as we are on reverse playback, it might be possible that
2310 * passthrough might have just been enabled, so make sure to drain the
2311 * buffers_queued list */
2312 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2313 gst_base_parse_finish_fragment (parse, TRUE);
2314 ret = gst_base_parse_send_buffers (parse);
2317 if (ret == GST_FLOW_OK) {
2318 GST_LOG_OBJECT (parse,
2319 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2320 ret = gst_pad_push (parse->srcpad, buffer);
2321 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2322 gst_flow_get_name (ret));
2324 GST_LOG_OBJECT (parse,
2325 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2326 gst_flow_get_name (ret));
2327 gst_buffer_unref (buffer);
2331 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2333 parse->priv->buffers_queued =
2334 g_slist_prepend (parse->priv->buffers_queued, buffer);
2338 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2339 size, gst_flow_get_name (ret));
2340 gst_buffer_unref (buffer);
2341 /* if we are not sufficiently in control, let upstream decide on EOS */
2342 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2343 (parse->priv->passthrough ||
2344 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2345 !parse->priv->upstream_seekable)))
2349 /* Update current running segment position */
2350 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2351 parse->segment.position < last_stop)
2352 parse->segment.position = last_stop;
2359 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2360 return GST_FLOW_ERROR;
2365 * gst_base_parse_finish_frame:
2366 * @parse: a #GstBaseParse
2367 * @frame: a #GstBaseParseFrame
2368 * @size: consumed input data represented by frame
2370 * Collects parsed data and pushes this downstream.
2371 * Source pad caps must be set when this is called.
2373 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2374 * Otherwise, @size samples will be taken from the input and used for output,
2375 * and the output's metadata (timestamps etc) will be taken as (optionally)
2376 * set by the subclass on @frame's (input) buffer (which is otherwise
2377 * ignored for any but the above purpose/information).
2379 * Note that the latter buffer is invalidated by this call, whereas the
2380 * caller retains ownership of @frame.
2382 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2385 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2388 GstFlowReturn ret = GST_FLOW_OK;
2390 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2391 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2392 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2393 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2396 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2397 "flushing size %d", frame->offset, size);
2399 /* some one-time start-up */
2400 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2401 gst_base_parse_check_seekability (parse);
2402 gst_base_parse_check_upstream (parse);
2405 parse->priv->flushed += size;
2407 if (parse->priv->scanning && frame->buffer) {
2408 if (!parse->priv->scanned_frame) {
2409 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2414 /* either PUSH or PULL mode arranges for adapter data */
2415 /* ensure output buffer */
2416 if (!frame->out_buffer) {
2417 GstBuffer *src, *dest;
2419 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2420 dest = frame->out_buffer;
2421 src = frame->buffer;
2422 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2423 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2424 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2425 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2426 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2427 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2429 gst_adapter_flush (parse->priv->adapter, size);
2432 /* use as input for subsequent processing */
2433 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2434 gst_buffer_unref (frame->out_buffer);
2435 frame->out_buffer = NULL;
2437 /* mark input size consumed */
2440 /* subclass might queue frames/data internally if it needs more
2441 * frames to decide on the format, or might request us to queue here. */
2442 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2443 gst_buffer_replace (&frame->buffer, NULL);
2445 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2446 GstBaseParseFrame *copy;
2448 copy = gst_base_parse_frame_copy (frame);
2449 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2450 gst_base_parse_queue_frame (parse, copy);
2454 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2460 /* gst_base_parse_drain:
2462 * Drains the adapter until it is empty. It decreases the min_frame_size to
2463 * match the current adapter size and calls chain method until the adapter
2464 * is emptied or chain returns with error.
2467 gst_base_parse_drain (GstBaseParse * parse)
2471 GST_DEBUG_OBJECT (parse, "draining");
2472 parse->priv->drain = TRUE;
2475 avail = gst_adapter_available (parse->priv->adapter);
2479 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2480 NULL) != GST_FLOW_OK) {
2484 /* nothing changed, maybe due to truncated frame; break infinite loop */
2485 if (avail == gst_adapter_available (parse->priv->adapter)) {
2486 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2487 gst_adapter_clear (parse->priv->adapter);
2491 parse->priv->drain = FALSE;
2494 /* gst_base_parse_send_buffers
2496 * Sends buffers collected in send_buffers downstream, and ensures that list
2497 * is empty at the end (errors or not).
2499 static GstFlowReturn
2500 gst_base_parse_send_buffers (GstBaseParse * parse)
2502 GSList *send = NULL;
2504 GstFlowReturn ret = GST_FLOW_OK;
2505 gboolean first = TRUE;
2507 send = parse->priv->buffers_send;
2511 buf = GST_BUFFER_CAST (send->data);
2512 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2513 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2514 ", offset %" G_GINT64_FORMAT, buf,
2515 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2516 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2517 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2519 /* Make sure the first buffer is always DISCONT. If we split
2520 * GOPs inside the parser this is otherwise not guaranteed */
2522 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2526 /* iterate output queue an push downstream */
2527 ret = gst_pad_push (parse->srcpad, buf);
2528 send = g_slist_delete_link (send, send);
2530 /* clear any leftover if error */
2531 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2533 buf = GST_BUFFER_CAST (send->data);
2534 gst_buffer_unref (buf);
2535 send = g_slist_delete_link (send, send);
2540 parse->priv->buffers_send = send;
2545 /* gst_base_parse_start_fragment:
2547 * Prepares for processing a reverse playback (forward) fragment
2548 * by (re)setting proper state variables.
2550 static GstFlowReturn
2551 gst_base_parse_start_fragment (GstBaseParse * parse)
2553 GST_LOG_OBJECT (parse, "starting fragment");
2555 /* invalidate so no fall-back timestamping is performed;
2556 * ok if taken from subclass or upstream */
2557 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2558 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2559 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2560 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2561 /* prevent it hanging around stop all the time */
2562 parse->segment.position = GST_CLOCK_TIME_NONE;
2564 parse->priv->discont = TRUE;
2566 /* head of previous fragment is now pending tail of current fragment */
2567 parse->priv->buffers_pending = parse->priv->buffers_head;
2568 parse->priv->buffers_head = NULL;
2574 /* gst_base_parse_finish_fragment:
2576 * Processes a reverse playback (forward) fragment:
2577 * - append head of last fragment that was skipped to current fragment data
2578 * - drain the resulting current fragment data (i.e. repeated chain)
2579 * - add time/duration (if needed) to frames queued by chain
2580 * - push queued data
2582 static GstFlowReturn
2583 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2586 GstFlowReturn ret = GST_FLOW_OK;
2587 gboolean seen_key = FALSE, seen_delta = FALSE;
2589 GST_LOG_OBJECT (parse, "finishing fragment");
2592 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2593 while (parse->priv->buffers_pending) {
2594 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2596 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2597 gst_buffer_get_size (buf));
2598 gst_adapter_push (parse->priv->adapter, buf);
2600 GST_LOG_OBJECT (parse, "discarding head buffer");
2601 gst_buffer_unref (buf);
2603 parse->priv->buffers_pending =
2604 g_slist_delete_link (parse->priv->buffers_pending,
2605 parse->priv->buffers_pending);
2608 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2609 /* initial skipped data is added to buffers_pending */
2610 gst_base_parse_drain (parse);
2612 if (parse->priv->buffers_send) {
2613 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2614 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2617 /* add metadata (if needed to queued buffers */
2618 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2619 GST_TIME_ARGS (parse->priv->last_pts));
2620 while (parse->priv->buffers_queued) {
2621 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2623 /* no touching if upstream or parsing provided time */
2624 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2625 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2626 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2627 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2628 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2629 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2630 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2632 parse->priv->last_pts = 0;
2633 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2634 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2635 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2637 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2638 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2639 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2641 parse->priv->last_dts = 0;
2642 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2643 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2644 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2647 /* no idea, very bad */
2648 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2651 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2652 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2654 /* reverse order for ascending sending */
2655 /* send downstream at keyframe not preceded by a keyframe
2656 * (e.g. that should identify start of collection of IDR nals) */
2657 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2659 ret = gst_base_parse_send_buffers (parse);
2660 /* if a problem, throw all to sending */
2661 if (ret != GST_FLOW_OK) {
2662 parse->priv->buffers_send =
2663 g_slist_reverse (parse->priv->buffers_queued);
2664 parse->priv->buffers_queued = NULL;
2674 parse->priv->buffers_send =
2675 g_slist_prepend (parse->priv->buffers_send, buf);
2676 parse->priv->buffers_queued =
2677 g_slist_delete_link (parse->priv->buffers_queued,
2678 parse->priv->buffers_queued);
2681 /* audio may have all marked as keyframe, so arrange to send here. Also
2682 * we might have ended the loop above on a keyframe, in which case we
2684 if (!seen_delta || seen_key)
2685 ret = gst_base_parse_send_buffers (parse);
2687 /* any trailing unused no longer usable (ideally none) */
2688 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2689 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2690 gst_adapter_available (parse->priv->adapter));
2691 gst_adapter_clear (parse->priv->adapter);
2697 /* small helper that checks whether we have been trying to resync too long */
2698 static inline GstFlowReturn
2699 gst_base_parse_check_sync (GstBaseParse * parse)
2701 if (G_UNLIKELY (parse->priv->discont &&
2702 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2703 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2704 ("Failed to parse stream"), (NULL));
2705 return GST_FLOW_ERROR;
2711 static GstFlowReturn
2712 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2714 GstBaseParseClass *bclass;
2715 GstBaseParse *parse;
2716 GstFlowReturn ret = GST_FLOW_OK;
2717 GstBuffer *tmpbuf = NULL;
2722 GstClockTime pts, dts;
2724 parse = GST_BASE_PARSE (parent);
2725 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2727 if (parse->priv->detecting) {
2728 GstBuffer *detect_buf;
2730 if (parse->priv->detect_buffers_size == 0) {
2731 detect_buf = gst_buffer_ref (buffer);
2736 detect_buf = gst_buffer_new ();
2738 for (l = parse->priv->detect_buffers; l; l = l->next) {
2739 gsize tmpsize = gst_buffer_get_size (l->data);
2741 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2742 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2746 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2747 offset, gst_buffer_get_size (buffer));
2750 ret = bclass->detect (parse, detect_buf);
2751 gst_buffer_unref (detect_buf);
2753 if (ret == GST_FLOW_OK) {
2756 /* Detected something */
2757 parse->priv->detecting = FALSE;
2759 for (l = parse->priv->detect_buffers; l; l = l->next) {
2760 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2762 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2763 parent, GST_BUFFER_CAST (l->data));
2765 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2767 g_list_free (parse->priv->detect_buffers);
2768 parse->priv->detect_buffers = NULL;
2769 parse->priv->detect_buffers_size = 0;
2771 if (ret != GST_FLOW_OK) {
2775 /* Handle the current buffer */
2776 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2777 /* Still detecting, append buffer or error out if draining */
2779 if (parse->priv->drain) {
2780 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2781 return GST_FLOW_ERROR;
2782 } else if (parse->priv->flushing) {
2783 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2785 g_list_free (parse->priv->detect_buffers);
2786 parse->priv->detect_buffers = NULL;
2787 parse->priv->detect_buffers_size = 0;
2789 parse->priv->detect_buffers =
2790 g_list_append (parse->priv->detect_buffers, buffer);
2791 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2795 /* Something went wrong, subclass responsible for error reporting */
2799 /* And now handle the current buffer if detection worked */
2802 if (G_LIKELY (buffer)) {
2803 GST_LOG_OBJECT (parse,
2804 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2805 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2806 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2807 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2808 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2810 if (G_UNLIKELY (!parse->priv->disable_passthrough
2811 && parse->priv->passthrough)) {
2812 GstBaseParseFrame frame;
2814 gst_base_parse_frame_init (&frame);
2815 frame.buffer = gst_buffer_make_writable (buffer);
2816 ret = gst_base_parse_push_frame (parse, &frame);
2817 gst_base_parse_frame_free (&frame);
2820 /* upstream feeding us in reverse playback;
2821 * finish previous fragment and start new upon DISCONT */
2822 if (parse->segment.rate < 0.0) {
2823 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2824 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2825 ret = gst_base_parse_finish_fragment (parse, TRUE);
2826 gst_base_parse_start_fragment (parse);
2829 gst_adapter_push (parse->priv->adapter, buffer);
2832 /* Parse and push as many frames as possible */
2833 /* Stop either when adapter is empty or we are flushing */
2834 while (!parse->priv->flushing) {
2837 /* note: if subclass indicates MAX fsize,
2838 * this will not likely be available anyway ... */
2839 min_size = MAX (parse->priv->min_frame_size, fsize);
2840 av = gst_adapter_available (parse->priv->adapter);
2842 if (G_UNLIKELY (parse->priv->drain)) {
2844 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2845 if (G_UNLIKELY (!min_size)) {
2850 /* Collect at least min_frame_size bytes */
2851 if (av < min_size) {
2852 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2856 /* move along with upstream timestamp (if any),
2857 * but interpolate in between */
2858 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2859 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2860 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2861 parse->priv->prev_pts = parse->priv->next_pts = pts;
2863 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2864 parse->priv->prev_dts = parse->priv->next_dts = dts;
2866 /* we can mess with, erm interpolate, timestamps,
2867 * and incoming stuff has PTS but no DTS seen so far,
2868 * then pick up DTS from PTS and hope for the best ... */
2869 if (parse->priv->infer_ts &&
2870 parse->priv->pts_interpolate &&
2871 !GST_CLOCK_TIME_IS_VALID (dts) &&
2872 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
2873 GST_CLOCK_TIME_IS_VALID (pts))
2874 parse->priv->next_dts = pts;
2876 /* always pass all available data */
2877 data = gst_adapter_map (parse->priv->adapter, av);
2878 /* arrange for actual data to be copied if subclass tries to,
2879 * since what is passed is tied to the adapter */
2880 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2881 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2883 /* already inform subclass what timestamps we have planned,
2884 * at least if provided by time-based upstream */
2885 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2886 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
2887 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
2890 /* keep the adapter mapped, so keep track of what has to be flushed */
2891 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2894 /* probably already implicitly unmapped due to adapter operation,
2895 * but for good measure ... */
2896 gst_adapter_unmap (parse->priv->adapter);
2897 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2900 if (skip == 0 && flush == 0) {
2901 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2902 "breaking to get more data");
2908 GST_LOG_OBJECT (parse, "chain leaving");
2912 /* pull @size bytes at current offset,
2913 * i.e. at least try to and possibly return a shorter buffer if near the end */
2914 static GstFlowReturn
2915 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2916 GstBuffer ** buffer)
2918 GstFlowReturn ret = GST_FLOW_OK;
2920 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2922 /* Caching here actually makes much less difference than one would expect.
2923 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2924 if (parse->priv->cache) {
2925 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2926 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2928 if (cache_offset <= parse->priv->offset &&
2929 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2930 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2931 parse->priv->offset - cache_offset, size);
2932 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2935 /* not enough data in the cache, free cache and get a new one */
2936 gst_buffer_unref (parse->priv->cache);
2937 parse->priv->cache = NULL;
2940 /* refill the cache */
2942 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2943 64 * 1024), &parse->priv->cache);
2944 if (ret != GST_FLOW_OK) {
2945 parse->priv->cache = NULL;
2949 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2951 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2953 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2957 /* Not possible to get enough data, try a last time with
2958 * requesting exactly the size we need */
2959 gst_buffer_unref (parse->priv->cache);
2960 parse->priv->cache = NULL;
2962 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2963 &parse->priv->cache);
2965 if (ret != GST_FLOW_OK) {
2966 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2971 if (gst_buffer_get_size (parse->priv->cache) < size) {
2972 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2973 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2974 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2976 *buffer = parse->priv->cache;
2977 parse->priv->cache = NULL;
2983 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2984 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2989 static GstFlowReturn
2990 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2993 GstClockTime ts = 0;
2997 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2998 ", last_offset = %" G_GINT64_FORMAT,
2999 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3001 if (!parse->priv->last_offset
3002 || parse->priv->last_pts <= parse->segment.start) {
3003 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3004 GST_TIME_ARGS (parse->segment.start));
3009 /* last fragment started at last_offset / last_ts;
3010 * seek back 10s capped at 1MB */
3011 if (parse->priv->last_pts >= 10 * GST_SECOND)
3012 ts = parse->priv->last_pts - 10 * GST_SECOND;
3013 /* if we are exact now, we will be more so going backwards */
3014 if (parse->priv->exact_position) {
3015 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3017 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3018 GST_FORMAT_BYTES, &offset)) {
3019 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3022 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3023 parse->priv->last_offset - 1024);
3024 offset = MAX (0, offset);
3026 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3028 parse->priv->offset = offset;
3030 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3032 if (ret != GST_FLOW_OK)
3035 /* offset will increase again as fragment is processed/parsed */
3036 parse->priv->last_offset = offset;
3038 gst_base_parse_start_fragment (parse);
3039 gst_adapter_push (parse->priv->adapter, buffer);
3040 ret = gst_base_parse_finish_fragment (parse, TRUE);
3041 if (ret != GST_FLOW_OK)
3044 /* force previous fragment */
3045 parse->priv->offset = -1;
3052 * pull and scan for next frame starting from current offset
3053 * ajusts sync, drain and offset going along */
3054 static GstFlowReturn
3055 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3058 GstFlowReturn ret = GST_FLOW_OK;
3059 guint fsize, min_size;
3063 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3064 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3066 /* let's make this efficient for all subclass once and for all;
3067 * maybe it does not need this much, but in the latter case, we know we are
3068 * in pull mode here and might as well try to read and supply more anyway
3069 * (so does the buffer caching mechanism) */
3073 min_size = MAX (parse->priv->min_frame_size, fsize);
3075 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3077 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3078 if (ret != GST_FLOW_OK)
3081 /* if we got a short read, inform subclass we are draining leftover
3082 * and no more is to be expected */
3083 if (gst_buffer_get_size (buffer) < min_size) {
3084 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3085 parse->priv->drain = TRUE;
3088 if (parse->priv->detecting) {
3089 ret = klass->detect (parse, buffer);
3090 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3091 /* If draining we error out, otherwise request a buffer
3093 if (parse->priv->drain) {
3094 gst_buffer_unref (buffer);
3095 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3096 return GST_FLOW_ERROR;
3099 gst_buffer_unref (buffer);
3102 } else if (ret != GST_FLOW_OK) {
3103 gst_buffer_unref (buffer);
3104 GST_ERROR_OBJECT (parse, "detect() returned %s",
3105 gst_flow_get_name (ret));
3109 /* Else handle this buffer normally */
3112 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3113 if (ret != GST_FLOW_OK)
3116 /* something flushed means something happened,
3117 * and we should bail out of this loop so as not to occupy
3118 * the task thread indefinitely */
3120 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3123 /* nothing flushed, no skip and draining, so nothing left to do */
3124 if (!skip && parse->priv->drain) {
3125 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3126 "breaking loop and marking EOS");
3130 /* otherwise, get some more data
3131 * note that is checked this does not happen indefinitely */
3133 GST_LOG_OBJECT (parse, "getting some more data");
3136 parse->priv->drain = FALSE;
3143 /* Loop that is used in pull mode to retrieve data from upstream */
3145 gst_base_parse_loop (GstPad * pad)
3147 GstBaseParse *parse;
3148 GstBaseParseClass *klass;
3149 GstFlowReturn ret = GST_FLOW_OK;
3151 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3152 klass = GST_BASE_PARSE_GET_CLASS (parse);
3154 GST_LOG_OBJECT (parse, "Entering parse loop");
3156 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3161 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3164 event = gst_event_new_stream_start (stream_id);
3165 gst_event_set_group_id (event, gst_util_group_id_next ());
3167 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3168 gst_pad_push_event (parse->srcpad, event);
3169 parse->priv->push_stream_start = FALSE;
3173 /* reverse playback:
3174 * first fragment (closest to stop time) is handled normally below,
3175 * then we pull in fragments going backwards */
3176 if (parse->segment.rate < 0.0) {
3177 /* check if we jumped back to a previous fragment,
3178 * which is a post-first fragment */
3179 if (parse->priv->offset < 0) {
3180 ret = gst_base_parse_handle_previous_fragment (parse);
3185 ret = gst_base_parse_scan_frame (parse, klass);
3186 if (ret != GST_FLOW_OK)
3189 /* eat expected eos signalling past segment in reverse playback */
3190 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3191 parse->segment.position >= parse->segment.stop) {
3192 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3193 /* push what was accumulated during loop run */
3194 gst_base_parse_finish_fragment (parse, FALSE);
3195 /* force previous fragment */
3196 parse->priv->offset = -1;
3201 if (ret == GST_FLOW_EOS)
3203 else if (ret != GST_FLOW_OK)
3206 gst_object_unref (parse);
3213 GST_DEBUG_OBJECT (parse, "eos");
3218 gboolean push_eos = FALSE;
3220 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3221 gst_flow_get_name (ret));
3222 gst_pad_pause_task (parse->sinkpad);
3224 if (ret == GST_FLOW_EOS) {
3225 /* handle end-of-stream/segment */
3226 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3229 if ((stop = parse->segment.stop) == -1)
3230 stop = parse->segment.duration;
3232 GST_DEBUG_OBJECT (parse, "sending segment_done");
3234 gst_element_post_message
3235 (GST_ELEMENT_CAST (parse),
3236 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3237 GST_FORMAT_TIME, stop));
3238 gst_pad_push_event (parse->srcpad,
3239 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3241 /* If we STILL have zero frames processed, fire an error */
3242 if (parse->priv->framecount == 0) {
3243 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3244 ("No valid frames found before end of stream"), (NULL));
3248 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3249 /* for fatal errors we post an error message, wrong-state is
3250 * not fatal because it happens due to flushes and only means
3251 * that we should stop now. */
3252 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3253 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3257 /* Push pending events, including SEGMENT events */
3258 gst_base_parse_push_pending_events (parse);
3260 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3262 gst_object_unref (parse);
3267 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3269 GstSchedulingFlags sched_flags;
3270 GstBaseParse *parse;
3274 parse = GST_BASE_PARSE (parent);
3276 GST_DEBUG_OBJECT (parse, "sink activate");
3278 query = gst_query_new_scheduling ();
3279 if (!gst_pad_peer_query (sinkpad, query)) {
3280 gst_query_unref (query);
3281 goto baseparse_push;
3284 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3286 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3287 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3289 gst_query_unref (query);
3292 goto baseparse_push;
3294 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3295 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3296 goto baseparse_push;
3298 parse->priv->push_stream_start = TRUE;
3300 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3305 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3306 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3311 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3313 GstBaseParseClass *klass;
3314 gboolean result = TRUE;
3316 GST_DEBUG_OBJECT (parse, "activate %d", active);
3318 klass = GST_BASE_PARSE_GET_CLASS (parse);
3321 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3322 result = klass->start (parse);
3324 /* If the subclass implements ::detect we want to
3325 * call it for the first buffers now */
3326 parse->priv->detecting = (klass->detect != NULL);
3328 /* We must make sure streaming has finished before resetting things
3329 * and calling the ::stop vfunc */
3330 GST_PAD_STREAM_LOCK (parse->sinkpad);
3331 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3333 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3334 result = klass->stop (parse);
3336 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3338 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3343 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3344 GstPadMode mode, gboolean active)
3347 GstBaseParse *parse;
3349 parse = GST_BASE_PARSE (parent);
3351 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3352 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3354 if (!gst_base_parse_activate (parse, active))
3355 goto activate_failed;
3358 case GST_PAD_MODE_PULL:
3360 parse->priv->pending_events =
3361 g_list_prepend (parse->priv->pending_events,
3362 gst_event_new_segment (&parse->segment));
3365 result = gst_pad_stop_task (pad);
3373 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3375 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3382 GST_DEBUG_OBJECT (parse, "activate failed");
3388 * gst_base_parse_set_duration:
3389 * @parse: #GstBaseParse.
3391 * @duration: duration value.
3392 * @interval: how often to update the duration estimate based on bitrate, or 0.
3394 * Sets the duration of the currently playing media. Subclass can use this
3395 * when it is able to determine duration and/or notices a change in the media
3396 * duration. Alternatively, if @interval is non-zero (default), then stream
3397 * duration is determined based on estimated bitrate, and updated every @interval
3401 gst_base_parse_set_duration (GstBaseParse * parse,
3402 GstFormat fmt, gint64 duration, gint interval)
3404 g_return_if_fail (parse != NULL);
3406 if (parse->priv->upstream_has_duration) {
3407 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3411 if (duration != parse->priv->duration) {
3414 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3415 gst_element_post_message (GST_ELEMENT (parse), m);
3417 /* TODO: what about duration tag? */
3419 parse->priv->duration = duration;
3420 parse->priv->duration_fmt = fmt;
3421 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3422 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3423 if (interval != 0) {
3424 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3428 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3429 parse->priv->update_interval = interval;
3435 * gst_base_parse_set_average_bitrate:
3436 * @parse: #GstBaseParse.
3437 * @bitrate: average bitrate in bits/second
3439 * Optionally sets the average bitrate detected in media (if non-zero),
3440 * e.g. based on metadata, as it will be posted to the application.
3442 * By default, announced average bitrate is estimated. The average bitrate
3443 * is used to estimate the total duration of the stream and to estimate
3444 * a seek position, if there's no index and the format is syncable
3445 * (see gst_base_parse_set_syncable()).
3448 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3450 parse->priv->bitrate = bitrate;
3451 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3455 * gst_base_parse_set_min_frame_size:
3456 * @parse: #GstBaseParse.
3457 * @min_size: Minimum size of the data that this base class should give to
3460 * Subclass can use this function to tell the base class that it needs to
3461 * give at least #min_size buffers.
3464 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3466 g_return_if_fail (parse != NULL);
3468 parse->priv->min_frame_size = min_size;
3469 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3473 * gst_base_parse_set_frame_rate:
3474 * @parse: the #GstBaseParse to set
3475 * @fps_num: frames per second (numerator).
3476 * @fps_den: frames per second (denominator).
3477 * @lead_in: frames needed before a segment for subsequent decode
3478 * @lead_out: frames needed after a segment
3480 * If frames per second is configured, parser can take care of buffer duration
3481 * and timestamping. When performing segment clipping, or seeking to a specific
3482 * location, a corresponding decoder might need an initial @lead_in and a
3483 * following @lead_out number of frames to ensure the desired segment is
3484 * entirely filled upon decoding.
3487 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3488 guint fps_den, guint lead_in, guint lead_out)
3490 g_return_if_fail (parse != NULL);
3492 parse->priv->fps_num = fps_num;
3493 parse->priv->fps_den = fps_den;
3494 if (!fps_num || !fps_den) {
3495 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3497 fps_num = fps_den = 0;
3498 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3499 parse->priv->lead_in = parse->priv->lead_out = 0;
3500 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3502 parse->priv->frame_duration =
3503 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3504 parse->priv->lead_in = lead_in;
3505 parse->priv->lead_out = lead_out;
3506 parse->priv->lead_in_ts =
3507 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3508 parse->priv->lead_out_ts =
3509 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3510 /* aim for about 1.5s to estimate duration */
3511 if (parse->priv->update_interval < 0) {
3512 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3513 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3514 parse->priv->update_interval);
3517 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3518 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3519 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3520 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3521 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3522 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3526 * gst_base_parse_set_has_timing_info:
3527 * @parse: a #GstBaseParse
3528 * @has_timing: whether frames carry timing information
3530 * Set if frames carry timing information which the subclass can (generally)
3531 * parse and provide. In particular, intrinsic (rather than estimated) time
3532 * can be obtained following a seek.
3535 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3537 parse->priv->has_timing_info = has_timing;
3538 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3542 * gst_base_parse_set_syncable:
3543 * @parse: a #GstBaseParse
3544 * @syncable: set if frame starts can be identified
3546 * Set if frame starts can be identified. This is set by default and
3547 * determines whether seeking based on bitrate averages
3548 * is possible for a format/stream.
3551 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3553 parse->priv->syncable = syncable;
3554 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3558 * gst_base_parse_set_passthrough:
3559 * @parse: a #GstBaseParse
3560 * @passthrough: %TRUE if parser should run in passthrough mode
3562 * Set if the nature of the format or configuration does not allow (much)
3563 * parsing, and the parser should operate in passthrough mode (which only
3564 * applies when operating in push mode). That is, incoming buffers are
3565 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3566 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3567 * so subclass can perform as much or as little is appropriate for
3568 * passthrough semantics in @pre_push_frame.
3571 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3573 parse->priv->passthrough = passthrough;
3574 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3578 * gst_base_parse_set_pts_interpolation:
3579 * @parse: a #GstBaseParse
3580 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3582 * By default, the base class will guess PTS timestamps using a simple
3583 * interpolation (previous timestamp + duration), which is incorrect for
3584 * data streams with reordering, where PTS can go backward. Sub-classes
3585 * implementing such formats should disable PTS interpolation.
3588 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3589 gboolean pts_interpolate)
3591 parse->priv->pts_interpolate = pts_interpolate;
3592 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3593 (pts_interpolate) ? "yes" : "no");
3597 * gst_base_parse_set_infer_ts:
3598 * @parse: a #GstBaseParse
3599 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3601 * By default, the base class might try to infer PTS from DTS and vice
3602 * versa. While this is generally correct for audio data, it may not
3603 * be otherwise. Sub-classes implementing such formats should disable
3604 * timestamp inferring.
3607 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3609 parse->priv->infer_ts = infer_ts;
3610 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3614 * gst_base_parse_set_latency:
3615 * @parse: a #GstBaseParse
3616 * @min_latency: minimum parse latency
3617 * @max_latency: maximum parse latency
3619 * Sets the minimum and maximum (which may likely be equal) latency introduced
3620 * by the parsing process. If there is such a latency, which depends on the
3621 * particular parsing of the format, it typically corresponds to 1 frame duration.
3624 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3625 GstClockTime max_latency)
3627 GST_OBJECT_LOCK (parse);
3628 parse->priv->min_latency = min_latency;
3629 parse->priv->max_latency = max_latency;
3630 GST_OBJECT_UNLOCK (parse);
3631 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3632 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3633 GST_TIME_ARGS (max_latency));
3637 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3638 GstClockTime * duration)
3640 gboolean res = FALSE;
3642 g_return_val_if_fail (duration != NULL, FALSE);
3644 *duration = GST_CLOCK_TIME_NONE;
3645 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3646 GST_LOG_OBJECT (parse, "using provided duration");
3647 *duration = parse->priv->duration;
3649 } else if (parse->priv->duration != -1) {
3650 GST_LOG_OBJECT (parse, "converting provided duration");
3651 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3652 parse->priv->duration, format, (gint64 *) duration);
3653 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3654 GST_LOG_OBJECT (parse, "using estimated duration");
3655 *duration = parse->priv->estimated_duration;
3658 GST_LOG_OBJECT (parse, "cannot estimate duration");
3661 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3662 GST_TIME_ARGS (*duration));
3667 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3669 gboolean res = FALSE;
3672 pad = GST_BASE_PARSE_SRC_PAD (parse);
3674 switch (GST_QUERY_TYPE (query)) {
3675 case GST_QUERY_POSITION:
3680 GST_DEBUG_OBJECT (parse, "position query");
3681 gst_query_parse_position (query, &format, NULL);
3683 /* try upstream first */
3684 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3686 /* Fall back on interpreting segment */
3687 GST_OBJECT_LOCK (parse);
3688 if (format == GST_FORMAT_BYTES) {
3689 dest_value = parse->priv->offset;
3691 } else if (format == parse->segment.format &&
3692 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3693 dest_value = gst_segment_to_stream_time (&parse->segment,
3694 parse->segment.format, parse->segment.position);
3697 GST_OBJECT_UNLOCK (parse);
3699 /* no precise result, upstream no idea either, then best estimate */
3700 /* priv->offset is updated in both PUSH/PULL modes */
3701 res = gst_base_parse_convert (parse,
3702 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3705 gst_query_set_position (query, format, dest_value);
3709 case GST_QUERY_DURATION:
3712 GstClockTime duration;
3714 GST_DEBUG_OBJECT (parse, "duration query");
3715 gst_query_parse_duration (query, &format, NULL);
3717 /* consult upstream */
3718 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3720 /* otherwise best estimate from us */
3722 res = gst_base_parse_get_duration (parse, format, &duration);
3724 gst_query_set_duration (query, format, duration);
3728 case GST_QUERY_SEEKING:
3731 GstClockTime duration = GST_CLOCK_TIME_NONE;
3732 gboolean seekable = FALSE;
3734 GST_DEBUG_OBJECT (parse, "seeking query");
3735 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3737 /* consult upstream */
3738 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3740 /* we may be able to help if in TIME */
3741 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3742 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3743 /* already OK if upstream takes care */
3744 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3746 if (!(res && seekable)) {
3747 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3748 || duration == -1) {
3749 /* seekable if we still have a chance to get duration later on */
3751 parse->priv->upstream_seekable && parse->priv->update_interval;
3753 seekable = parse->priv->upstream_seekable;
3754 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3757 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3763 case GST_QUERY_FORMATS:
3764 gst_query_set_formatsv (query, 3, fmtlist);
3767 case GST_QUERY_CONVERT:
3769 GstFormat src_format, dest_format;
3770 gint64 src_value, dest_value;
3772 gst_query_parse_convert (query, &src_format, &src_value,
3773 &dest_format, &dest_value);
3775 res = gst_base_parse_convert (parse, src_format, src_value,
3776 dest_format, &dest_value);
3778 gst_query_set_convert (query, src_format, src_value,
3779 dest_format, dest_value);
3783 case GST_QUERY_LATENCY:
3785 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3787 GstClockTime min_latency, max_latency;
3789 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3790 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3791 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3792 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3794 GST_OBJECT_LOCK (parse);
3795 /* add our latency */
3796 if (min_latency != -1)
3797 min_latency += parse->priv->min_latency;
3798 if (max_latency != -1)
3799 max_latency += parse->priv->max_latency;
3800 GST_OBJECT_UNLOCK (parse);
3802 gst_query_set_latency (query, live, min_latency, max_latency);
3806 case GST_QUERY_SEGMENT:
3811 format = parse->segment.format;
3814 gst_segment_to_stream_time (&parse->segment, format,
3815 parse->segment.start);
3816 if ((stop = parse->segment.stop) == -1)
3817 stop = parse->segment.duration;
3819 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3821 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3826 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3832 /* scans for a cluster start from @pos,
3833 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3834 static GstFlowReturn
3835 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3836 GstClockTime * time, GstClockTime * duration)
3838 GstBaseParseClass *klass;
3840 gboolean orig_drain, orig_discont;
3841 GstFlowReturn ret = GST_FLOW_OK;
3842 GstBuffer *buf = NULL;
3843 GstBaseParseFrame *sframe = NULL;
3845 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3846 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3847 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3849 klass = GST_BASE_PARSE_GET_CLASS (parse);
3851 *time = GST_CLOCK_TIME_NONE;
3852 *duration = GST_CLOCK_TIME_NONE;
3855 orig_offset = parse->priv->offset;
3856 orig_discont = parse->priv->discont;
3857 orig_drain = parse->priv->drain;
3859 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3860 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3862 /* jump elsewhere and locate next frame */
3863 parse->priv->offset = *pos;
3864 /* mark as scanning so frames don't get processed all the way */
3865 parse->priv->scanning = TRUE;
3866 ret = gst_base_parse_scan_frame (parse, klass);
3867 parse->priv->scanning = FALSE;
3868 /* retrieve frame found during scan */
3869 sframe = parse->priv->scanned_frame;
3870 parse->priv->scanned_frame = NULL;
3872 if (ret != GST_FLOW_OK || !sframe)
3875 /* get offset first, subclass parsing might dump other stuff in there */
3876 *pos = sframe->offset;
3877 buf = sframe->buffer;
3880 /* but it should provide proper time */
3881 *time = GST_BUFFER_TIMESTAMP (buf);
3882 *duration = GST_BUFFER_DURATION (buf);
3884 GST_LOG_OBJECT (parse,
3885 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3886 GST_TIME_ARGS (*time), *pos);
3890 gst_base_parse_frame_free (sframe);
3893 parse->priv->offset = orig_offset;
3894 parse->priv->discont = orig_discont;
3895 parse->priv->drain = orig_drain;
3900 /* bisect and scan through file for frame starting before @time,
3901 * returns OK and @time/@offset if found, NONE and/or error otherwise
3902 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3903 static GstFlowReturn
3904 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3907 GstFlowReturn ret = GST_FLOW_OK;
3908 gint64 lpos, hpos, newpos;
3909 GstClockTime time, ltime, htime, newtime, dur;
3910 gboolean cont = TRUE;
3911 const GstClockTime tolerance = TARGET_DIFFERENCE;
3912 const guint chunk = 4 * 1024;
3914 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3915 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3917 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3918 GST_TIME_ARGS (*_time));
3920 /* TODO also make keyframe aware if useful some day */
3935 /* do not know at first */
3937 *_time = GST_CLOCK_TIME_NONE;
3939 /* need initial positions; start and end */
3940 lpos = parse->priv->first_frame_offset;
3941 ltime = parse->priv->first_frame_pts;
3942 /* try other one if no luck */
3943 if (!GST_CLOCK_TIME_IS_VALID (ltime))
3944 ltime = parse->priv->first_frame_dts;
3945 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3946 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3947 return GST_FLOW_ERROR;
3949 hpos = parse->priv->upstream_size;
3951 GST_DEBUG_OBJECT (parse,
3952 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3953 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
3954 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3956 /* check preconditions are satisfied;
3957 * start and end are needed, except for special case where we scan for
3958 * last frame to determine duration */
3959 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3960 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3961 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3965 /* shortcut cases */
3968 } else if (time < ltime + tolerance) {
3972 } else if (time >= htime) {
3978 while (htime > ltime && cont) {
3979 GST_LOG_OBJECT (parse,
3980 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3981 GST_TIME_ARGS (ltime));
3982 GST_LOG_OBJECT (parse,
3983 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3984 GST_TIME_ARGS (htime));
3985 if (G_UNLIKELY (time == G_MAXINT64)) {
3987 } else if (G_LIKELY (hpos > lpos)) {
3989 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3992 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3994 /* we check this case once, but not forever, so break loop */
3999 newpos = CLAMP (newpos, lpos, hpos);
4000 GST_LOG_OBJECT (parse,
4001 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4002 GST_TIME_ARGS (time), newpos);
4004 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4005 if (ret == GST_FLOW_EOS) {
4006 /* heuristic HACK */
4007 hpos = MAX (lpos, hpos - chunk);
4009 } else if (ret != GST_FLOW_OK) {
4013 if (newtime == -1 || newpos == -1) {
4014 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4018 if (G_UNLIKELY (time == G_MAXINT64)) {
4021 if (GST_CLOCK_TIME_IS_VALID (dur))
4024 } else if (newtime > time) {
4026 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4028 } else if (newtime + tolerance > time) {
4029 /* close enough undershoot */
4033 } else if (newtime < ltime) {
4034 /* so a position beyond lpos resulted in earlier time than ltime ... */
4035 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4038 /* undershoot too far */
4039 newpos += newpos == lpos ? chunk : 0;
4040 lpos = CLAMP (newpos, lpos, hpos);
4046 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4047 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4052 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4053 gboolean before, GstClockTime * _ts)
4055 gint64 bytes = 0, ts = 0;
4056 GstIndexEntry *entry = NULL;
4058 if (time == GST_CLOCK_TIME_NONE) {
4064 GST_BASE_PARSE_INDEX_LOCK (parse);
4065 if (parse->priv->index) {
4066 /* Let's check if we have an index entry for that time */
4067 entry = gst_index_get_assoc_entry (parse->priv->index,
4068 parse->priv->index_id,
4069 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4070 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4074 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4075 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4077 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4078 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4079 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4081 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4082 GST_TIME_ARGS (time));
4085 ts = GST_CLOCK_TIME_NONE;
4088 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4097 /* returns TRUE if seek succeeded */
4099 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4104 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4105 gboolean flush, update, res = TRUE, accurate;
4106 gint64 start, stop, seekpos, seekstop;
4107 GstSegment seeksegment = { 0, };
4108 GstClockTime start_ts;
4110 GstEvent *segment_event;
4112 /* try upstream first, unless we're driving the streaming thread ourselves */
4113 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4114 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4119 gst_event_parse_seek (event, &rate, &format, &flags,
4120 &start_type, &start, &stop_type, &stop);
4121 seqnum = gst_event_get_seqnum (event);
4123 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4124 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4125 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4126 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4128 /* we can only handle TIME, so check if subclass can convert
4129 * to TIME format if it's some other format (such as DEFAULT) */
4130 if (format != GST_FORMAT_TIME) {
4131 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4132 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4134 goto no_convert_to_time;
4136 GST_INFO_OBJECT (parse, "converted %s format to start time "
4137 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4138 gst_format_get_name (format), GST_TIME_ARGS (start),
4139 GST_TIME_ARGS (stop));
4141 format = GST_FORMAT_TIME;
4144 /* no negative rates in push mode (unless upstream takes care of that, but
4145 * we've already tried upstream and it didn't handle the seek request) */
4146 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4149 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4150 goto negative_rate_pull_mode;
4152 if (start_type != GST_SEEK_TYPE_SET ||
4153 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4156 /* get flush flag */
4157 flush = flags & GST_SEEK_FLAG_FLUSH;
4159 /* copy segment, we need this because we still need the old
4160 * segment when we close the current segment. */
4161 gst_segment_copy_into (&parse->segment, &seeksegment);
4163 GST_DEBUG_OBJECT (parse, "configuring seek");
4164 gst_segment_do_seek (&seeksegment, rate, format, flags,
4165 start_type, start, stop_type, stop, &update);
4167 /* accurate seeking implies seek tables are used to obtain position,
4168 * and the requested segment is maintained exactly, not adjusted any way */
4169 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4171 /* maybe we can be accurate for (almost) free */
4172 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4173 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4174 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4178 GstClockTime startpos = seeksegment.position;
4180 /* accurate requested, so ... seek a bit before target */
4181 if (startpos < parse->priv->lead_in_ts)
4184 startpos -= parse->priv->lead_in_ts;
4185 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4186 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4189 start_ts = seeksegment.position;
4190 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4191 GST_FORMAT_BYTES, &seekpos))
4192 goto convert_failed;
4193 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4194 GST_FORMAT_BYTES, &seekstop))
4195 goto convert_failed;
4198 GST_DEBUG_OBJECT (parse,
4199 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4201 GST_DEBUG_OBJECT (parse,
4202 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4203 seeksegment.stop, seekstop);
4205 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4208 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4211 if (parse->srcpad) {
4212 GstEvent *fevent = gst_event_new_flush_start ();
4213 GST_DEBUG_OBJECT (parse, "sending flush start");
4215 gst_event_set_seqnum (fevent, seqnum);
4217 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4218 /* unlock upstream pull_range */
4219 gst_pad_push_event (parse->sinkpad, fevent);
4222 gst_pad_pause_task (parse->sinkpad);
4225 /* we should now be able to grab the streaming thread because we stopped it
4226 * with the above flush/pause code */
4227 GST_PAD_STREAM_LOCK (parse->sinkpad);
4229 /* save current position */
4230 last_stop = parse->segment.position;
4231 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4234 /* now commit to new position */
4236 /* prepare for streaming again */
4238 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4239 GST_DEBUG_OBJECT (parse, "sending flush stop");
4240 gst_event_set_seqnum (fevent, seqnum);
4241 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4242 gst_pad_push_event (parse->sinkpad, fevent);
4243 gst_base_parse_clear_queues (parse);
4245 /* keep track of our position */
4246 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4247 seeksegment.format, parse->segment.position);
4250 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4252 /* store the newsegment event so it can be sent from the streaming thread. */
4253 /* This will be sent later in _loop() */
4254 segment_event = gst_event_new_segment (&parse->segment);
4255 gst_event_set_seqnum (segment_event, seqnum);
4256 parse->priv->pending_events =
4257 g_list_prepend (parse->priv->pending_events, segment_event);
4259 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4260 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4261 ", time = %" GST_TIME_FORMAT, format,
4262 GST_TIME_ARGS (parse->segment.start),
4263 GST_TIME_ARGS (parse->segment.stop),
4264 GST_TIME_ARGS (parse->segment.time));
4266 /* one last chance in pull mode to stay accurate;
4267 * maybe scan and subclass can find where to go */
4270 GstClockTime ts = seeksegment.position;
4272 gst_base_parse_locate_time (parse, &ts, &scanpos);
4276 /* running collected index now consists of several intervals,
4277 * so optimized check no longer possible */
4278 parse->priv->index_last_valid = FALSE;
4279 parse->priv->index_last_offset = 0;
4280 parse->priv->index_last_ts = 0;
4284 /* mark discont if we are going to stream from another position. */
4285 if (seekpos != parse->priv->offset) {
4286 GST_DEBUG_OBJECT (parse,
4287 "mark DISCONT, we did a seek to another position");
4288 parse->priv->offset = seekpos;
4289 parse->priv->last_offset = seekpos;
4290 parse->priv->seen_keyframe = FALSE;
4291 parse->priv->discont = TRUE;
4292 parse->priv->next_dts = start_ts;
4293 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4294 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4295 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4296 parse->priv->sync_offset = seekpos;
4297 parse->priv->exact_position = accurate;
4300 /* Start streaming thread if paused */
4301 gst_pad_start_task (parse->sinkpad,
4302 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4304 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4309 GstEvent *new_event;
4310 GstBaseParseSeek *seek;
4311 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4313 /* The only thing we need to do in PUSH-mode is to send the
4314 seek event (in bytes) to upstream. Segment / flush handling happens
4315 in corresponding src event handlers */
4316 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4317 if (seekstop >= 0 && seekstop <= seekpos)
4319 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4320 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4321 gst_event_set_seqnum (new_event, seqnum);
4323 /* store segment info so its precise details can be reconstructed when
4324 * receiving newsegment;
4325 * this matters for all details when accurate seeking,
4326 * is most useful to preserve NONE stop time otherwise */
4327 seek = g_new0 (GstBaseParseSeek, 1);
4328 seek->segment = seeksegment;
4329 seek->accurate = accurate;
4330 seek->offset = seekpos;
4331 seek->start_ts = start_ts;
4332 GST_OBJECT_LOCK (parse);
4333 /* less optimal, but preserves order */
4334 parse->priv->pending_seeks =
4335 g_slist_append (parse->priv->pending_seeks, seek);
4336 GST_OBJECT_UNLOCK (parse);
4338 res = gst_pad_push_event (parse->sinkpad, new_event);
4341 GST_OBJECT_LOCK (parse);
4342 parse->priv->pending_seeks =
4343 g_slist_remove (parse->priv->pending_seeks, seek);
4344 GST_OBJECT_UNLOCK (parse);
4350 gst_event_unref (event);
4354 negative_rate_pull_mode:
4356 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4362 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4368 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4374 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4375 "couldn't convert that into TIME format", gst_format_get_name (format));
4381 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4387 /* Checks if bitrates are available from upstream tags so that we don't
4388 * override them later
4391 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4393 GstTagList *taglist = NULL;
4396 gst_event_parse_tag (event, &taglist);
4398 /* We only care about stream tags here */
4399 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4402 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4403 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4404 parse->priv->post_min_bitrate = FALSE;
4406 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4407 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4408 parse->priv->post_avg_bitrate = FALSE;
4410 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4411 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4412 parse->priv->post_max_bitrate = FALSE;
4418 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4420 GstBaseParse *parse = GST_BASE_PARSE (element);
4422 GST_BASE_PARSE_INDEX_LOCK (parse);
4423 if (parse->priv->index)
4424 gst_object_unref (parse->priv->index);
4426 parse->priv->index = gst_object_ref (index);
4427 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4428 &parse->priv->index_id);
4429 parse->priv->own_index = FALSE;
4431 parse->priv->index = NULL;
4433 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4437 gst_base_parse_get_index (GstElement * element)
4439 GstBaseParse *parse = GST_BASE_PARSE (element);
4440 GstIndex *result = NULL;
4442 GST_BASE_PARSE_INDEX_LOCK (parse);
4443 if (parse->priv->index)
4444 result = gst_object_ref (parse->priv->index);
4445 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4451 static GstStateChangeReturn
4452 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4454 GstBaseParse *parse;
4455 GstStateChangeReturn result;
4457 parse = GST_BASE_PARSE (element);
4459 switch (transition) {
4460 case GST_STATE_CHANGE_READY_TO_PAUSED:
4461 /* If this is our own index destroy it as the
4462 * old entries might be wrong for the new stream */
4463 GST_BASE_PARSE_INDEX_LOCK (parse);
4464 if (parse->priv->own_index) {
4465 gst_object_unref (parse->priv->index);
4466 parse->priv->index = NULL;
4467 parse->priv->own_index = FALSE;
4470 /* If no index was created, generate one */
4471 if (G_UNLIKELY (!parse->priv->index)) {
4472 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4474 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4475 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4476 &parse->priv->index_id);
4477 parse->priv->own_index = TRUE;
4479 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4485 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4487 switch (transition) {
4488 case GST_STATE_CHANGE_PAUSED_TO_READY:
4489 gst_base_parse_reset (parse);
4499 * gst_base_parse_set_ts_at_offset:
4500 * @parse: a #GstBaseParse
4501 * @offset: offset into current buffer
4503 * This function should only be called from a @handle_frame implementation.
4505 * GstBaseParse creates initial timestamps for frames by using the last
4506 * timestamp seen in the stream before the frame starts. In certain
4507 * cases, the correct timestamps will occur in the stream after the
4508 * start of the frame, but before the start of the actual picture data.
4509 * This function can be used to set the timestamps based on the offset
4510 * into the frame data that the picture starts.
4515 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4517 GstClockTime pts, dts;
4519 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4521 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4522 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4524 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4525 GST_DEBUG_OBJECT (parse,
4526 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4527 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4529 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4530 parse->priv->prev_pts = parse->priv->next_pts = pts;
4532 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4533 parse->priv->prev_dts = parse->priv->next_dts = dts;