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 /* True when no buffers have been received yet */
354 gboolean first_buffer;
356 /* if TRUE, a STREAM_START event needs to be pushed */
357 gboolean push_stream_start;
359 /* When we need to skip more data than we have currently */
363 typedef struct _GstBaseParseSeek
368 GstClockTime start_ts;
371 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
376 PROP_DISABLE_PASSTHROUGH,
380 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
381 g_mutex_lock (&parse->priv->index_lock);
382 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
383 g_mutex_unlock (&parse->priv->index_lock);
385 static GstElementClass *parent_class = NULL;
387 static void gst_base_parse_class_init (GstBaseParseClass * klass);
388 static void gst_base_parse_init (GstBaseParse * parse,
389 GstBaseParseClass * klass);
392 gst_base_parse_get_type (void)
394 static volatile gsize base_parse_type = 0;
396 if (g_once_init_enter (&base_parse_type)) {
397 static const GTypeInfo base_parse_info = {
398 sizeof (GstBaseParseClass),
399 (GBaseInitFunc) NULL,
400 (GBaseFinalizeFunc) NULL,
401 (GClassInitFunc) gst_base_parse_class_init,
404 sizeof (GstBaseParse),
406 (GInstanceInitFunc) gst_base_parse_init,
410 _type = g_type_register_static (GST_TYPE_ELEMENT,
411 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
412 g_once_init_leave (&base_parse_type, _type);
414 return (GType) base_parse_type;
417 static void gst_base_parse_finalize (GObject * object);
419 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
420 GstStateChange transition);
421 static void gst_base_parse_reset (GstBaseParse * parse);
424 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
425 static GstIndex *gst_base_parse_get_index (GstElement * element);
428 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
430 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
431 GstObject * parent, GstPadMode mode, gboolean active);
432 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
434 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
436 static void gst_base_parse_set_property (GObject * object, guint prop_id,
437 const GValue * value, GParamSpec * pspec);
438 static void gst_base_parse_get_property (GObject * object, guint prop_id,
439 GValue * value, GParamSpec * pspec);
441 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
443 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
446 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
448 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
451 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
453 static void gst_base_parse_loop (GstPad * pad);
455 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
456 GstBaseParseFrame * frame);
458 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
461 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
464 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
466 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
469 static void gst_base_parse_drain (GstBaseParse * parse);
471 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
472 gboolean post_min, gboolean post_avg, gboolean post_max);
474 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
475 GstClockTime time, gboolean before, GstClockTime * _ts);
476 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
477 GstClockTime * _time, gint64 * _offset);
479 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
480 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
482 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
484 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
486 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
488 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
491 gst_base_parse_clear_queues (GstBaseParse * parse)
493 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
494 g_slist_free (parse->priv->buffers_queued);
495 parse->priv->buffers_queued = NULL;
496 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
498 g_slist_free (parse->priv->buffers_pending);
499 parse->priv->buffers_pending = NULL;
500 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
501 g_slist_free (parse->priv->buffers_head);
502 parse->priv->buffers_head = NULL;
503 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
504 g_slist_free (parse->priv->buffers_send);
505 parse->priv->buffers_send = NULL;
507 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
508 g_list_free (parse->priv->detect_buffers);
509 parse->priv->detect_buffers = NULL;
510 parse->priv->detect_buffers_size = 0;
512 g_queue_foreach (&parse->priv->queued_frames,
513 (GFunc) gst_base_parse_frame_free, NULL);
514 g_queue_clear (&parse->priv->queued_frames);
516 gst_buffer_replace (&parse->priv->cache, NULL);
518 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
519 g_list_free (parse->priv->pending_events);
520 parse->priv->pending_events = NULL;
522 parse->priv->checked_media = FALSE;
526 gst_base_parse_finalize (GObject * object)
528 GstBaseParse *parse = GST_BASE_PARSE (object);
530 g_object_unref (parse->priv->adapter);
532 if (parse->priv->cache) {
533 gst_buffer_unref (parse->priv->cache);
534 parse->priv->cache = NULL;
537 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
539 g_list_free (parse->priv->pending_events);
540 parse->priv->pending_events = NULL;
542 if (parse->priv->index) {
543 gst_object_unref (parse->priv->index);
544 parse->priv->index = NULL;
546 g_mutex_clear (&parse->priv->index_lock);
548 gst_base_parse_clear_queues (parse);
550 G_OBJECT_CLASS (parent_class)->finalize (object);
554 gst_base_parse_class_init (GstBaseParseClass * klass)
556 GObjectClass *gobject_class;
557 GstElementClass *gstelement_class;
559 gobject_class = G_OBJECT_CLASS (klass);
560 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
561 parent_class = g_type_class_peek_parent (klass);
563 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
564 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
565 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
568 * GstBaseParse:disable-passthrough:
570 * If set to %TRUE, baseparse will unconditionally force parsing of the
571 * incoming data. This can be required in the rare cases where the incoming
572 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
573 * force validation and parsing of the incoming data.
574 * If set to %FALSE, decision of whether to parse the data or not is up to
575 * the implementation (standard behaviour).
577 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
578 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
579 "Force processing (disables passthrough)",
580 DEFAULT_DISABLE_PASSTHROUGH,
581 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
583 gstelement_class = (GstElementClass *) klass;
584 gstelement_class->change_state =
585 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
588 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
589 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
592 /* Default handlers */
593 klass->sink_event = gst_base_parse_sink_event_default;
594 klass->src_event = gst_base_parse_src_event_default;
595 klass->sink_query = gst_base_parse_sink_query_default;
596 klass->src_query = gst_base_parse_src_query_default;
597 klass->convert = gst_base_parse_convert_default;
599 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
600 "baseparse element");
604 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
606 GstPadTemplate *pad_template;
608 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
610 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
613 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
614 g_return_if_fail (pad_template != NULL);
615 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
616 gst_pad_set_event_function (parse->sinkpad,
617 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
618 gst_pad_set_query_function (parse->sinkpad,
619 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
620 gst_pad_set_chain_function (parse->sinkpad,
621 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
622 gst_pad_set_activate_function (parse->sinkpad,
623 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
624 gst_pad_set_activatemode_function (parse->sinkpad,
625 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
626 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
627 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
629 GST_DEBUG_OBJECT (parse, "sinkpad created");
632 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
633 g_return_if_fail (pad_template != NULL);
634 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
635 gst_pad_set_event_function (parse->srcpad,
636 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
637 gst_pad_set_query_function (parse->srcpad,
638 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
639 gst_pad_use_fixed_caps (parse->srcpad);
640 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
641 GST_DEBUG_OBJECT (parse, "src created");
643 g_queue_init (&parse->priv->queued_frames);
645 parse->priv->adapter = gst_adapter_new ();
647 parse->priv->pad_mode = GST_PAD_MODE_NONE;
649 g_mutex_init (&parse->priv->index_lock);
652 gst_base_parse_reset (parse);
653 GST_DEBUG_OBJECT (parse, "init ok");
655 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
659 gst_base_parse_set_property (GObject * object, guint prop_id,
660 const GValue * value, GParamSpec * pspec)
662 GstBaseParse *parse = GST_BASE_PARSE (object);
665 case PROP_DISABLE_PASSTHROUGH:
666 parse->priv->disable_passthrough = g_value_get_boolean (value);
669 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
675 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
678 GstBaseParse *parse = GST_BASE_PARSE (object);
681 case PROP_DISABLE_PASSTHROUGH:
682 g_value_set_boolean (value, parse->priv->disable_passthrough);
685 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
690 static GstBaseParseFrame *
691 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
693 GstBaseParseFrame *copy;
695 copy = g_slice_dup (GstBaseParseFrame, frame);
696 copy->buffer = gst_buffer_ref (frame->buffer);
697 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
699 GST_TRACE ("copied frame %p -> %p", frame, copy);
705 gst_base_parse_frame_free (GstBaseParseFrame * frame)
707 GST_TRACE ("freeing frame %p", frame);
710 gst_buffer_unref (frame->buffer);
711 frame->buffer = NULL;
714 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
715 g_slice_free (GstBaseParseFrame, frame);
717 memset (frame, 0, sizeof (*frame));
721 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
722 (GBoxedCopyFunc) gst_base_parse_frame_copy,
723 (GBoxedFreeFunc) gst_base_parse_frame_free);
726 * gst_base_parse_frame_init:
727 * @frame: #GstBaseParseFrame.
729 * Sets a #GstBaseParseFrame to initial state. Currently this means
730 * all public fields are zero-ed and a private flag is set to make
731 * sure gst_base_parse_frame_free() only frees the contents but not
732 * the actual frame. Use this function to initialise a #GstBaseParseFrame
733 * allocated on the stack.
736 gst_base_parse_frame_init (GstBaseParseFrame * frame)
738 memset (frame, 0, sizeof (GstBaseParseFrame));
739 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
740 GST_TRACE ("inited frame %p", frame);
744 * gst_base_parse_frame_new:
745 * @buffer: (transfer none): a #GstBuffer
747 * @overhead: number of bytes in this frame which should be counted as
748 * metadata overhead, ie. not used to calculate the average bitrate.
749 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
751 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
752 * elements written in C should usually allocate the frame on the stack and
753 * then use gst_base_parse_frame_init() to initialise it.
755 * Returns: a newly-allocated #GstBaseParseFrame. Free with
756 * gst_base_parse_frame_free() when no longer needed.
759 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
762 GstBaseParseFrame *frame;
764 frame = g_slice_new0 (GstBaseParseFrame);
765 frame->buffer = gst_buffer_ref (buffer);
767 GST_TRACE ("created frame %p", frame);
772 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
775 gst_buffer_replace (&frame->buffer, buf);
779 /* set flags one by one for clarity */
780 if (G_UNLIKELY (parse->priv->drain))
781 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
783 /* losing sync is pretty much a discont (and vice versa), no ? */
784 if (G_UNLIKELY (parse->priv->discont))
785 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
789 gst_base_parse_reset (GstBaseParse * parse)
791 GST_OBJECT_LOCK (parse);
792 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
793 parse->priv->duration = -1;
794 parse->priv->min_frame_size = 1;
795 parse->priv->discont = TRUE;
796 parse->priv->flushing = FALSE;
797 parse->priv->offset = 0;
798 parse->priv->sync_offset = 0;
799 parse->priv->update_interval = -1;
800 parse->priv->fps_num = parse->priv->fps_den = 0;
801 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
802 parse->priv->lead_in = parse->priv->lead_out = 0;
803 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
804 parse->priv->bitrate = 0;
805 parse->priv->framecount = 0;
806 parse->priv->bytecount = 0;
807 parse->priv->acc_duration = 0;
808 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
809 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
810 parse->priv->first_frame_offset = -1;
811 parse->priv->estimated_duration = -1;
812 parse->priv->estimated_drift = 0;
813 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
814 parse->priv->next_dts = 0;
815 parse->priv->syncable = TRUE;
816 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
817 parse->priv->passthrough = FALSE;
818 parse->priv->pts_interpolate = TRUE;
819 parse->priv->infer_ts = TRUE;
820 parse->priv->has_timing_info = FALSE;
821 parse->priv->post_min_bitrate = TRUE;
822 parse->priv->post_avg_bitrate = TRUE;
823 parse->priv->post_max_bitrate = TRUE;
824 parse->priv->min_bitrate = G_MAXUINT;
825 parse->priv->max_bitrate = 0;
826 parse->priv->avg_bitrate = 0;
827 parse->priv->posted_avg_bitrate = 0;
829 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
830 parse->priv->index_last_offset = -1;
831 parse->priv->index_last_valid = TRUE;
832 parse->priv->upstream_seekable = FALSE;
833 parse->priv->upstream_size = 0;
834 parse->priv->upstream_has_duration = FALSE;
835 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
836 parse->priv->idx_interval = 0;
837 parse->priv->idx_byte_interval = 0;
838 parse->priv->exact_position = TRUE;
839 parse->priv->seen_keyframe = FALSE;
840 parse->priv->checked_media = FALSE;
842 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
843 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
844 parse->priv->last_offset = 0;
846 parse->priv->skip = 0;
848 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
850 g_list_free (parse->priv->pending_events);
851 parse->priv->pending_events = NULL;
853 if (parse->priv->cache) {
854 gst_buffer_unref (parse->priv->cache);
855 parse->priv->cache = NULL;
858 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
859 g_slist_free (parse->priv->pending_seeks);
860 parse->priv->pending_seeks = NULL;
862 if (parse->priv->adapter)
863 gst_adapter_clear (parse->priv->adapter);
865 parse->priv->new_frame = TRUE;
867 parse->priv->first_buffer = TRUE;
869 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
870 g_list_free (parse->priv->detect_buffers);
871 parse->priv->detect_buffers = NULL;
872 parse->priv->detect_buffers_size = 0;
873 GST_OBJECT_UNLOCK (parse);
876 /* gst_base_parse_parse_frame:
877 * @parse: #GstBaseParse.
878 * @buffer: #GstBuffer.
880 * Default callback for parse_frame.
883 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
885 GstBuffer *buffer = frame->buffer;
887 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
888 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
889 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
891 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
892 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
893 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
895 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
896 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
897 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
902 /* gst_base_parse_convert:
903 * @parse: #GstBaseParse.
904 * @src_format: #GstFormat describing the source format.
905 * @src_value: Source value to be converted.
906 * @dest_format: #GstFormat defining the converted format.
907 * @dest_value: Pointer where the conversion result will be put.
909 * Converts using configured "convert" vmethod in #GstBaseParse class.
911 * Returns: %TRUE if conversion was successful.
914 gst_base_parse_convert (GstBaseParse * parse,
915 GstFormat src_format,
916 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
918 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
921 g_return_val_if_fail (dest_value != NULL, FALSE);
926 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
928 #ifndef GST_DISABLE_GST_DEBUG
931 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
932 GST_LOG_OBJECT (parse,
933 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
934 GST_TIME_ARGS (src_value), *dest_value);
935 } else if (dest_format == GST_FORMAT_TIME &&
936 src_format == GST_FORMAT_BYTES) {
937 GST_LOG_OBJECT (parse,
938 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
939 src_value, GST_TIME_ARGS (*dest_value));
941 GST_LOG_OBJECT (parse,
942 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
943 GST_STR_NULL (gst_format_get_name (src_format)),
944 GST_STR_NULL (gst_format_get_name (dest_format)),
945 src_value, *dest_value);
948 GST_DEBUG_OBJECT (parse, "conversion failed");
956 /* gst_base_parse_sink_event:
957 * @pad: #GstPad that received the event.
958 * @event: #GstEvent to be handled.
960 * Handler for sink pad events.
962 * Returns: %TRUE if the event was handled.
965 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
967 GstBaseParse *parse = GST_BASE_PARSE (parent);
968 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
971 ret = bclass->sink_event (parse, event);
977 /* gst_base_parse_sink_event_default:
978 * @parse: #GstBaseParse.
979 * @event: #GstEvent to be handled.
981 * Element-level event handler function.
983 * The event will be unreffed only if it has been handled and this
984 * function returns %TRUE
986 * Returns: %TRUE if the event was handled and not need forwarding.
989 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
991 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
992 gboolean ret = FALSE;
993 gboolean forward_immediate = FALSE;
995 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
996 GST_EVENT_TYPE_NAME (event));
998 switch (GST_EVENT_TYPE (event)) {
1003 gst_event_parse_caps (event, &caps);
1004 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
1006 if (klass->set_sink_caps)
1007 ret = klass->set_sink_caps (parse, caps);
1011 /* will send our own caps downstream */
1012 gst_event_unref (event);
1016 case GST_EVENT_SEGMENT:
1018 const GstSegment *in_segment;
1019 GstSegment out_segment;
1020 gint64 offset = 0, next_dts;
1021 guint32 seqnum = gst_event_get_seqnum (event);
1023 gst_event_parse_segment (event, &in_segment);
1024 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1025 out_segment.rate = in_segment->rate;
1026 out_segment.applied_rate = in_segment->applied_rate;
1028 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1030 parse->priv->upstream_format = in_segment->format;
1031 if (in_segment->format == GST_FORMAT_BYTES) {
1032 GstBaseParseSeek *seek = NULL;
1035 /* stop time is allowed to be open-ended, but not start & pos */
1036 offset = in_segment->time;
1038 GST_OBJECT_LOCK (parse);
1039 for (node = parse->priv->pending_seeks; node; node = node->next) {
1040 GstBaseParseSeek *tmp = node->data;
1042 if (tmp->offset == offset) {
1047 parse->priv->pending_seeks =
1048 g_slist_remove (parse->priv->pending_seeks, seek);
1049 GST_OBJECT_UNLOCK (parse);
1052 GST_DEBUG_OBJECT (parse,
1053 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1054 seek->accurate ? " accurate" : "", &seek->segment);
1056 out_segment.start = seek->segment.start;
1057 out_segment.stop = seek->segment.stop;
1058 out_segment.time = seek->segment.start;
1060 next_dts = seek->start_ts;
1061 parse->priv->exact_position = seek->accurate;
1064 /* best attempt convert */
1065 /* as these are only estimates, stop is kept open-ended to avoid
1066 * premature cutting */
1067 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1068 GST_FORMAT_TIME, (gint64 *) & next_dts);
1070 out_segment.start = next_dts;
1071 out_segment.stop = GST_CLOCK_TIME_NONE;
1072 out_segment.time = next_dts;
1074 parse->priv->exact_position = (in_segment->start == 0);
1077 gst_event_unref (event);
1079 event = gst_event_new_segment (&out_segment);
1080 gst_event_set_seqnum (event, seqnum);
1082 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1083 GST_SEGMENT_FORMAT, in_segment);
1085 } else if (in_segment->format != GST_FORMAT_TIME) {
1086 /* Unknown incoming segment format. Output a default open-ended
1088 gst_event_unref (event);
1090 out_segment.start = 0;
1091 out_segment.stop = GST_CLOCK_TIME_NONE;
1092 out_segment.time = 0;
1094 event = gst_event_new_segment (&out_segment);
1095 gst_event_set_seqnum (event, seqnum);
1099 /* not considered BYTE seekable if it is talking to us in TIME,
1100 * whatever else it might claim */
1101 parse->priv->upstream_seekable = FALSE;
1102 next_dts = in_segment->start;
1103 gst_event_copy_segment (event, &out_segment);
1106 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1109 gst_segment_set_newsegment (&parse->segment, update, rate,
1110 applied_rate, format, start, stop, start);
1115 /* save the segment for later, right before we push a new buffer so that
1116 * the caps are fixed and the next linked element can receive
1117 * the segment but finish the current segment */
1118 GST_DEBUG_OBJECT (parse, "draining current segment");
1119 if (in_segment->rate > 0.0)
1120 gst_base_parse_drain (parse);
1122 gst_base_parse_finish_fragment (parse, FALSE);
1123 gst_adapter_clear (parse->priv->adapter);
1125 parse->priv->offset = offset;
1126 parse->priv->sync_offset = offset;
1127 parse->priv->next_dts = next_dts;
1128 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1129 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1130 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1131 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1132 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1133 parse->priv->discont = TRUE;
1134 parse->priv->seen_keyframe = FALSE;
1138 case GST_EVENT_FLUSH_START:
1139 GST_OBJECT_LOCK (parse);
1140 parse->priv->flushing = TRUE;
1141 GST_OBJECT_UNLOCK (parse);
1144 case GST_EVENT_FLUSH_STOP:
1145 gst_adapter_clear (parse->priv->adapter);
1146 gst_base_parse_clear_queues (parse);
1147 parse->priv->flushing = FALSE;
1148 parse->priv->discont = TRUE;
1149 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1150 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1151 parse->priv->new_frame = TRUE;
1152 parse->priv->skip = 0;
1154 forward_immediate = TRUE;
1158 if (parse->segment.rate > 0.0)
1159 gst_base_parse_drain (parse);
1161 gst_base_parse_finish_fragment (parse, TRUE);
1163 /* If we STILL have zero frames processed, fire an error */
1164 if (parse->priv->framecount == 0) {
1165 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1166 ("No valid frames found before end of stream"), (NULL));
1168 /* newsegment and other serialized events before eos */
1169 gst_base_parse_push_pending_events (parse);
1171 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1172 /* We've not posted bitrate tags yet - do so now */
1173 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1175 forward_immediate = TRUE;
1177 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1178 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1179 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1180 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1183 const GstStructure *s;
1184 gboolean ev_still_state;
1186 s = gst_event_get_structure (event);
1188 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1189 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1190 if (ev_still_state) {
1191 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1192 if (parse->segment.rate > 0.0)
1193 gst_base_parse_drain (parse);
1195 gst_base_parse_finish_fragment (parse, TRUE);
1197 forward_immediate = TRUE;
1203 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1205 gst_base_parse_push_pending_events (parse);
1207 if (parse->segment.rate > 0.0)
1208 gst_base_parse_drain (parse);
1210 gst_base_parse_finish_fragment (parse, TRUE);
1211 forward_immediate = TRUE;
1215 /* See if any bitrate tags were posted */
1216 gst_base_parse_handle_tag (parse, event);
1219 case GST_EVENT_STREAM_START:
1220 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1221 forward_immediate = TRUE;
1228 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1229 * For EOS this is required because no buffer or serialized event
1230 * will come after EOS and nothing could trigger another
1231 * _finish_frame() call. *
1232 * If the subclass handles sending of EOS manually it can return
1233 * _DROPPED from ::finish() and all other subclasses should have
1234 * decoded/flushed all remaining data before this
1236 * For FLUSH_STOP this is required because it is expected
1237 * to be forwarded immediately and no buffers are queued anyway.
1240 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1241 ret = gst_pad_push_event (parse->srcpad, event);
1243 parse->priv->pending_events =
1244 g_list_prepend (parse->priv->pending_events, event);
1249 GST_DEBUG_OBJECT (parse, "event handled");
1255 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1260 pad = GST_BASE_PARSE_SINK_PAD (parse);
1262 switch (GST_QUERY_TYPE (query)) {
1263 case GST_QUERY_CAPS:
1265 GstBaseParseClass *bclass;
1267 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1269 if (bclass->get_sink_caps) {
1270 GstCaps *caps, *filter;
1272 gst_query_parse_caps (query, &filter);
1273 caps = bclass->get_sink_caps (parse, filter);
1274 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1276 gst_query_set_caps_result (query, caps);
1277 gst_caps_unref (caps);
1281 GstCaps *caps, *template_caps, *filter;
1283 gst_query_parse_caps (query, &filter);
1284 template_caps = gst_pad_get_pad_template_caps (pad);
1285 if (filter != NULL) {
1287 gst_caps_intersect_full (filter, template_caps,
1288 GST_CAPS_INTERSECT_FIRST);
1289 gst_caps_unref (template_caps);
1291 caps = template_caps;
1293 gst_query_set_caps_result (query, caps);
1294 gst_caps_unref (caps);
1302 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1311 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1313 GstBaseParseClass *bclass;
1314 GstBaseParse *parse;
1317 parse = GST_BASE_PARSE (parent);
1318 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1320 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1322 if (bclass->sink_query)
1323 ret = bclass->sink_query (parse, query);
1327 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1328 GST_QUERY_TYPE_NAME (query), ret, query);
1334 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1336 GstBaseParseClass *bclass;
1337 GstBaseParse *parse;
1340 parse = GST_BASE_PARSE (parent);
1341 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1343 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1344 GST_QUERY_TYPE_NAME (query), query);
1346 if (bclass->src_query)
1347 ret = bclass->src_query (parse, query);
1351 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1352 GST_QUERY_TYPE_NAME (query), ret, query);
1357 /* gst_base_parse_src_event:
1358 * @pad: #GstPad that received the event.
1359 * @event: #GstEvent that was received.
1361 * Handler for source pad events.
1363 * Returns: %TRUE if the event was handled.
1366 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1368 GstBaseParse *parse;
1369 GstBaseParseClass *bclass;
1370 gboolean ret = TRUE;
1372 parse = GST_BASE_PARSE (parent);
1373 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1375 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1376 GST_EVENT_TYPE_NAME (event));
1378 if (bclass->src_event)
1379 ret = bclass->src_event (parse, event);
1381 gst_event_unref (event);
1387 gst_base_parse_is_seekable (GstBaseParse * parse)
1389 /* FIXME: could do more here, e.g. check index or just send data from 0
1390 * in pull mode and let decoder/sink clip */
1391 return parse->priv->syncable;
1394 /* gst_base_parse_src_event_default:
1395 * @parse: #GstBaseParse.
1396 * @event: #GstEvent that was received.
1398 * Default srcpad event handler.
1400 * Returns: %TRUE if the event was handled and can be dropped.
1403 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1405 gboolean res = FALSE;
1407 switch (GST_EVENT_TYPE (event)) {
1408 case GST_EVENT_SEEK:
1409 if (gst_base_parse_is_seekable (parse))
1410 res = gst_base_parse_handle_seek (parse, event);
1413 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1422 * gst_base_parse_convert_default:
1423 * @parse: #GstBaseParse.
1424 * @src_format: #GstFormat describing the source format.
1425 * @src_value: Source value to be converted.
1426 * @dest_format: #GstFormat defining the converted format.
1427 * @dest_value: Pointer where the conversion result will be put.
1429 * Default implementation of "convert" vmethod in #GstBaseParse class.
1431 * Returns: %TRUE if conversion was successful.
1434 gst_base_parse_convert_default (GstBaseParse * parse,
1435 GstFormat src_format,
1436 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1438 gboolean ret = FALSE;
1439 guint64 bytes, duration;
1441 if (G_UNLIKELY (src_format == dest_format)) {
1442 *dest_value = src_value;
1446 if (G_UNLIKELY (src_value == -1)) {
1451 if (G_UNLIKELY (src_value == 0)) {
1456 /* need at least some frames */
1457 if (!parse->priv->framecount)
1460 duration = parse->priv->acc_duration / GST_MSECOND;
1461 bytes = parse->priv->bytecount;
1463 if (G_UNLIKELY (!duration || !bytes))
1464 goto no_duration_bytes;
1466 if (src_format == GST_FORMAT_BYTES) {
1467 if (dest_format == GST_FORMAT_TIME) {
1468 /* BYTES -> TIME conversion */
1469 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1470 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1471 *dest_value *= GST_MSECOND;
1472 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1473 *dest_value / GST_MSECOND);
1476 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1478 } else if (src_format == GST_FORMAT_TIME) {
1479 if (dest_format == GST_FORMAT_BYTES) {
1480 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1481 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1483 GST_DEBUG_OBJECT (parse,
1484 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1485 src_value / GST_MSECOND, *dest_value);
1488 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1490 } else if (src_format == GST_FORMAT_DEFAULT) {
1491 /* DEFAULT == frame-based */
1492 if (dest_format == GST_FORMAT_TIME) {
1493 GST_DEBUG_OBJECT (parse, "converting default -> time");
1494 if (parse->priv->fps_den) {
1495 *dest_value = gst_util_uint64_scale (src_value,
1496 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1500 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1503 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1510 GST_DEBUG_OBJECT (parse, "no framecount");
1515 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1516 G_GUINT64_FORMAT, duration, bytes);
1523 gst_base_parse_update_duration (GstBaseParse * baseparse)
1526 GstBaseParse *parse;
1528 parse = GST_BASE_PARSE (baseparse);
1530 peer = gst_pad_get_peer (parse->sinkpad);
1532 gboolean qres = FALSE;
1533 gint64 ptot, dest_value;
1535 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1536 gst_object_unref (GST_OBJECT (peer));
1538 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1539 GST_FORMAT_TIME, &dest_value)) {
1541 /* inform if duration changed, but try to avoid spamming */
1542 parse->priv->estimated_drift +=
1543 dest_value - parse->priv->estimated_duration;
1545 parse->priv->estimated_duration = dest_value;
1546 GST_LOG_OBJECT (parse,
1547 "updated estimated duration to %" GST_TIME_FORMAT,
1548 GST_TIME_ARGS (dest_value));
1550 if (parse->priv->estimated_drift > GST_SECOND ||
1551 parse->priv->estimated_drift < -GST_SECOND) {
1552 gst_element_post_message (GST_ELEMENT (parse),
1553 gst_message_new_duration_changed (GST_OBJECT (parse)));
1554 parse->priv->estimated_drift = 0;
1562 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1563 gboolean post_avg, gboolean post_max)
1565 GstTagList *taglist = NULL;
1567 if (post_min && parse->priv->post_min_bitrate) {
1568 taglist = gst_tag_list_new_empty ();
1570 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1571 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1574 if (post_avg && parse->priv->post_avg_bitrate) {
1575 if (taglist == NULL)
1576 taglist = gst_tag_list_new_empty ();
1578 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1579 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1580 parse->priv->avg_bitrate, NULL);
1583 if (post_max && parse->priv->post_max_bitrate) {
1584 if (taglist == NULL)
1585 taglist = gst_tag_list_new_empty ();
1587 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1588 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1591 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1592 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1593 parse->priv->max_bitrate);
1595 if (taglist != NULL) {
1596 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1600 /* gst_base_parse_update_bitrates:
1601 * @parse: #GstBaseParse.
1602 * @buffer: Current frame as a #GstBuffer
1604 * Keeps track of the minimum and maximum bitrates, and also maintains a
1605 * running average bitrate of the stream so far.
1608 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1610 /* Only update the tag on a 10 kbps delta */
1611 static const gint update_threshold = 10000;
1613 guint64 data_len, frame_dur;
1614 gint overhead, frame_bitrate, old_avg_bitrate;
1615 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1616 GstBuffer *buffer = frame->buffer;
1618 overhead = frame->overhead;
1622 data_len = gst_buffer_get_size (buffer) - overhead;
1623 parse->priv->data_bytecount += data_len;
1625 /* duration should be valid by now,
1626 * either set by subclass or maybe based on fps settings */
1627 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1628 /* Calculate duration of a frame from buffer properties */
1629 frame_dur = GST_BUFFER_DURATION (buffer);
1630 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1631 parse->priv->acc_duration;
1634 /* No way to figure out frame duration (is this even possible?) */
1638 /* override if subclass provided bitrate, e.g. metadata based */
1639 if (parse->priv->bitrate) {
1640 parse->priv->avg_bitrate = parse->priv->bitrate;
1641 /* spread this (confirmed) info ASAP */
1642 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1643 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1647 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1651 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1652 parse->priv->avg_bitrate);
1654 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1656 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1657 /* always post all at threshold time */
1658 update_min = update_max = update_avg = TRUE;
1661 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1662 if (frame_bitrate < parse->priv->min_bitrate) {
1663 parse->priv->min_bitrate = frame_bitrate;
1667 if (frame_bitrate > parse->priv->max_bitrate) {
1668 parse->priv->max_bitrate = frame_bitrate;
1672 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1673 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1674 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1679 if ((update_min || update_avg || update_max))
1680 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1687 * gst_base_parse_add_index_entry:
1688 * @parse: #GstBaseParse.
1689 * @offset: offset of entry
1690 * @ts: timestamp associated with offset
1691 * @key: whether entry refers to keyframe
1692 * @force: add entry disregarding sanity checks
1694 * Adds an entry to the index associating @offset to @ts. It is recommended
1695 * to only add keyframe entries. @force allows to bypass checks, such as
1696 * whether the stream is (upstream) seekable, another entry is already "close"
1697 * to the new entry, etc.
1699 * Returns: #gboolean indicating whether entry was added
1702 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1703 GstClockTime ts, gboolean key, gboolean force)
1705 gboolean ret = FALSE;
1706 GstIndexAssociation associations[2];
1708 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1709 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1711 if (G_LIKELY (!force)) {
1713 if (!parse->priv->upstream_seekable) {
1714 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1718 /* FIXME need better helper data structure that handles these issues
1719 * related to ongoing collecting of index entries */
1720 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1722 GST_LOG_OBJECT (parse,
1723 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1724 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1728 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1729 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1730 parse->priv->idx_interval) {
1731 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1732 GST_TIME_ARGS (parse->priv->index_last_ts));
1736 /* if last is not really the last one */
1737 if (!parse->priv->index_last_valid) {
1738 GstClockTime prev_ts;
1740 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1741 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1742 GST_LOG_OBJECT (parse,
1743 "entry too close to existing entry %" GST_TIME_FORMAT,
1744 GST_TIME_ARGS (prev_ts));
1745 parse->priv->index_last_offset = offset;
1746 parse->priv->index_last_ts = ts;
1752 associations[0].format = GST_FORMAT_TIME;
1753 associations[0].value = ts;
1754 associations[1].format = GST_FORMAT_BYTES;
1755 associations[1].value = offset;
1757 /* index might change on-the-fly, although that would be nutty app ... */
1758 GST_BASE_PARSE_INDEX_LOCK (parse);
1759 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1760 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1761 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1762 (const GstIndexAssociation *) &associations);
1763 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1766 parse->priv->index_last_offset = offset;
1767 parse->priv->index_last_ts = ts;
1776 /* check for seekable upstream, above and beyond a mere query */
1778 gst_base_parse_check_seekability (GstBaseParse * parse)
1781 gboolean seekable = FALSE;
1782 gint64 start = -1, stop = -1;
1783 guint idx_interval = 0;
1784 guint64 idx_byte_interval = 0;
1786 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1787 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1788 GST_DEBUG_OBJECT (parse, "seeking query failed");
1792 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1794 /* try harder to query upstream size if we didn't get it the first time */
1795 if (seekable && stop == -1) {
1796 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1797 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1800 /* if upstream doesn't know the size, it's likely that it's not seekable in
1801 * practice even if it technically may be seekable */
1802 if (seekable && (start != 0 || stop <= start)) {
1803 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1807 /* let's not put every single frame into our index */
1809 if (stop < 10 * 1024 * 1024)
1811 else if (stop < 100 * 1024 * 1024)
1814 idx_interval = 1000;
1816 /* ensure that even for large files (e.g. very long audio files), the index
1817 * stays reasonably-size, with some arbitrary limit to the total number of
1819 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1820 GST_DEBUG_OBJECT (parse,
1821 "Limiting index entries to %d, indexing byte interval %"
1822 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1826 gst_query_unref (query);
1828 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1829 G_GUINT64_FORMAT ")", seekable, start, stop);
1830 parse->priv->upstream_seekable = seekable;
1831 parse->priv->upstream_size = seekable ? stop : 0;
1833 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1834 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1835 parse->priv->idx_byte_interval = idx_byte_interval;
1838 /* some misc checks on upstream */
1840 gst_base_parse_check_upstream (GstBaseParse * parse)
1844 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1845 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1846 /* upstream has one, accept it also, and no further updates */
1847 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1848 parse->priv->upstream_has_duration = TRUE;
1851 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1852 parse->priv->upstream_has_duration);
1855 /* checks src caps to determine if dealing with audio or video */
1856 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1858 gst_base_parse_check_media (GstBaseParse * parse)
1863 caps = gst_pad_get_current_caps (parse->srcpad);
1864 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1865 parse->priv->is_video =
1866 g_str_has_prefix (gst_structure_get_name (s), "video");
1868 /* historical default */
1869 parse->priv->is_video = FALSE;
1872 gst_caps_unref (caps);
1874 parse->priv->checked_media = TRUE;
1875 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1878 /* takes ownership of frame */
1880 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1882 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1883 /* frame allocated on the heap, we can just take ownership */
1884 g_queue_push_tail (&parse->priv->queued_frames, frame);
1885 GST_TRACE ("queued frame %p", frame);
1887 GstBaseParseFrame *copy;
1889 /* probably allocated on the stack, must make a proper copy */
1890 copy = gst_base_parse_frame_copy (frame);
1891 g_queue_push_tail (&parse->priv->queued_frames, copy);
1892 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1893 gst_base_parse_frame_free (frame);
1897 /* makes sure that @buf is properly prepared and decorated for passing
1898 * to baseclass, and an equally setup frame is returned setup with @buf.
1899 * Takes ownership of @buf. */
1900 static GstBaseParseFrame *
1901 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1903 GstBaseParseFrame *frame = NULL;
1905 buffer = gst_buffer_make_writable (buffer);
1907 GST_LOG_OBJECT (parse,
1908 "preparing frame at offset %" G_GUINT64_FORMAT
1909 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1910 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1911 gst_buffer_get_size (buffer));
1913 if (parse->priv->discont) {
1914 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1915 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1916 parse->priv->discont = FALSE;
1919 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1921 frame = gst_base_parse_frame_new (buffer, 0, 0);
1923 /* also ensure to update state flags */
1924 gst_base_parse_frame_update (parse, frame, buffer);
1925 gst_buffer_unref (buffer);
1927 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1928 GST_LOG_OBJECT (parse, "marking as new frame");
1929 parse->priv->new_frame = FALSE;
1930 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1933 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1935 /* use default handler to provide initial (upstream) metadata */
1936 gst_base_parse_parse_frame (parse, frame);
1941 /* Wraps buffer in a frame and dispatches to subclass.
1942 * Also manages data skipping and offset handling (including adapter flushing).
1943 * Takes ownership of @buffer */
1944 static GstFlowReturn
1945 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1946 gint * skip, gint * flushed)
1948 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1949 GstBaseParseFrame *frame;
1952 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1954 GST_LOG_OBJECT (parse,
1955 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1956 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1957 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1958 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1959 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1961 /* track what is being flushed during this single round of frame processing */
1962 parse->priv->flushed = 0;
1965 /* make it easy for _finish_frame to pick up input data */
1966 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1967 gst_buffer_ref (buffer);
1968 gst_adapter_push (parse->priv->adapter, buffer);
1971 frame = gst_base_parse_prepare_frame (parse, buffer);
1972 ret = klass->handle_frame (parse, frame, skip);
1974 *flushed = parse->priv->flushed;
1976 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1979 /* subclass can only do one of these, or semantics are too unclear */
1980 g_assert (*skip == 0 || *flushed == 0);
1982 /* track skipping */
1984 GstClockTime pts, dts;
1987 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1988 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1989 /* reverse playback, and no frames found yet, so we are skipping
1990 * the leading part of a fragment, which may form the tail of
1991 * fragment coming later, hopefully subclass skips efficiently ... */
1992 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1993 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1994 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1995 outbuf = gst_buffer_make_writable (outbuf);
1996 GST_BUFFER_PTS (outbuf) = pts;
1997 GST_BUFFER_DTS (outbuf) = dts;
1998 parse->priv->buffers_head =
1999 g_slist_prepend (parse->priv->buffers_head, outbuf);
2002 /* If we're asked to skip more than is available in the adapter,
2003 we need to remember what we need to skip for next iteration */
2004 gsize av = gst_adapter_available (parse->priv->adapter);
2005 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2007 gst_adapter_flush (parse->priv->adapter, *skip);
2010 ("This is more than available, flushing %" G_GSIZE_FORMAT
2011 ", storing %u to skip", av, (guint) (*skip - av));
2012 parse->priv->skip = *skip - av;
2013 gst_adapter_flush (parse->priv->adapter, av);
2017 if (!parse->priv->discont)
2018 parse->priv->sync_offset = parse->priv->offset;
2019 parse->priv->offset += *skip;
2020 parse->priv->discont = TRUE;
2021 /* check for indefinite skipping */
2022 if (ret == GST_FLOW_OK)
2023 ret = gst_base_parse_check_sync (parse);
2026 parse->priv->offset += *flushed;
2028 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2029 gst_adapter_clear (parse->priv->adapter);
2032 gst_base_parse_frame_free (frame);
2037 /* gst_base_parse_push_pending_events:
2038 * @parse: #GstBaseParse
2040 * Pushes the pending events
2043 gst_base_parse_push_pending_events (GstBaseParse * parse)
2045 if (G_UNLIKELY (parse->priv->pending_events)) {
2046 GList *r = g_list_reverse (parse->priv->pending_events);
2049 parse->priv->pending_events = NULL;
2050 for (l = r; l != NULL; l = l->next) {
2051 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2057 /* gst_base_parse_handle_and_push_frame:
2058 * @parse: #GstBaseParse.
2059 * @klass: #GstBaseParseClass.
2060 * @frame: (transfer full): a #GstBaseParseFrame
2062 * Parses the frame from given buffer and pushes it forward. Also performs
2063 * timestamp handling and checks the segment limits.
2065 * This is called with srcpad STREAM_LOCK held.
2067 * Returns: #GstFlowReturn
2069 static GstFlowReturn
2070 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2071 GstBaseParseFrame * frame)
2076 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2078 buffer = frame->buffer;
2079 offset = frame->offset;
2081 /* check if subclass/format can provide ts.
2082 * If so, that allows and enables extra seek and duration determining options */
2083 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2084 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2085 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2086 parse->priv->first_frame_offset = offset;
2087 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2088 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2089 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2090 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2091 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2092 GST_TIME_ARGS (parse->priv->first_frame_pts),
2093 parse->priv->first_frame_offset);
2094 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2096 GstClockTime last_ts = G_MAXINT64;
2098 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2099 gst_base_parse_locate_time (parse, &last_ts, &off);
2100 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2101 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2104 /* disable further checks */
2105 parse->priv->first_frame_offset = 0;
2109 /* track upstream time if provided, not subclass' internal notion of it */
2110 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2111 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2112 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2115 /* interpolating and no valid pts yet,
2116 * start with dts and carry on from there */
2117 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2118 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2119 parse->priv->next_pts = parse->priv->next_dts;
2121 /* again use default handler to add missing metadata;
2122 * we may have new information on frame properties */
2123 gst_base_parse_parse_frame (parse, frame);
2125 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2126 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2127 parse->priv->next_dts =
2128 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2129 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2130 GstClockTime next_pts =
2131 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2132 if (next_pts >= parse->priv->next_dts)
2133 parse->priv->next_pts = next_pts;
2136 /* we lost track, do not produce bogus time next time around
2137 * (probably means parser subclass has given up on parsing as well) */
2138 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2139 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2142 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2143 GST_BUFFER_PTS_IS_VALID (buffer))
2144 gst_base_parse_add_index_entry (parse, offset,
2145 GST_BUFFER_PTS (buffer),
2146 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2148 /* All OK, push queued frames if there are any */
2149 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2150 GstBaseParseFrame *queued_frame;
2152 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2153 gst_base_parse_push_frame (parse, queued_frame);
2154 gst_base_parse_frame_free (queued_frame);
2158 return gst_base_parse_push_frame (parse, frame);
2162 * gst_base_parse_push_frame:
2163 * @parse: #GstBaseParse.
2164 * @frame: (transfer none): a #GstBaseParseFrame
2166 * Pushes the frame's buffer downstream, sends any pending events and
2167 * does some timestamp and segment handling. Takes ownership of
2168 * frame's buffer, though caller retains ownership of @frame.
2170 * This must be called with sinkpad STREAM_LOCK held.
2172 * Returns: #GstFlowReturn
2175 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2177 GstFlowReturn ret = GST_FLOW_OK;
2178 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2179 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2180 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2184 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2185 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2187 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2189 buffer = frame->buffer;
2191 GST_LOG_OBJECT (parse,
2192 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2193 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2194 gst_buffer_get_size (buffer),
2195 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2196 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2197 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2200 parse->priv->bytecount += frame->size;
2201 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2202 parse->priv->framecount++;
2203 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2204 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2207 /* 0 means disabled */
2208 if (parse->priv->update_interval < 0)
2209 parse->priv->update_interval = 50;
2210 else if (parse->priv->update_interval > 0 &&
2211 (parse->priv->framecount % parse->priv->update_interval) == 0)
2212 gst_base_parse_update_duration (parse);
2214 if (GST_BUFFER_PTS_IS_VALID (buffer))
2215 last_start = last_stop = GST_BUFFER_PTS (buffer);
2216 if (last_start != GST_CLOCK_TIME_NONE
2217 && GST_BUFFER_DURATION_IS_VALID (buffer))
2218 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2220 /* should have caps by now */
2221 if (!gst_pad_has_current_caps (parse->srcpad))
2224 if (G_UNLIKELY (!parse->priv->checked_media)) {
2225 /* have caps; check identity */
2226 gst_base_parse_check_media (parse);
2229 /* Push pending events, including SEGMENT events */
2230 gst_base_parse_push_pending_events (parse);
2232 /* segment adjustment magic; only if we are running the whole show */
2233 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2234 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2235 parse->priv->upstream_seekable)) {
2237 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2238 GST_CLOCK_TIME_IS_VALID (last_start)) {
2239 GstClockTimeDiff diff;
2241 /* only send newsegments with increasing start times,
2242 * otherwise if these go back and forth downstream (sinks) increase
2243 * accumulated time and running_time */
2244 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2245 if (G_UNLIKELY (diff > 2 * GST_SECOND
2246 && last_start > parse->segment.start
2247 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2248 || last_start < parse->segment.stop))) {
2250 GST_DEBUG_OBJECT (parse,
2251 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2252 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2253 "Sending updated SEGMENT events", diff,
2254 GST_TIME_ARGS (parse->segment.position),
2255 GST_TIME_ARGS (last_start));
2257 /* skip gap FIXME */
2258 gst_pad_push_event (parse->srcpad,
2259 gst_event_new_segment (&parse->segment));
2261 parse->segment.position = last_start;
2266 /* update bitrates and optionally post corresponding tags
2267 * (following newsegment) */
2268 gst_base_parse_update_bitrates (parse, frame);
2270 if (klass->pre_push_frame) {
2271 ret = klass->pre_push_frame (parse, frame);
2273 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2276 /* take final ownership of frame buffer */
2277 if (frame->out_buffer) {
2278 buffer = frame->out_buffer;
2279 frame->out_buffer = NULL;
2280 gst_buffer_replace (&frame->buffer, NULL);
2282 buffer = frame->buffer;
2283 frame->buffer = NULL;
2286 /* subclass must play nice */
2287 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2289 size = gst_buffer_get_size (buffer);
2291 parse->priv->seen_keyframe |= parse->priv->is_video &&
2292 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2294 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2295 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2296 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2297 GST_BUFFER_TIMESTAMP (buffer) >
2298 parse->segment.stop + parse->priv->lead_out_ts) {
2299 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2301 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2302 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2303 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2304 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2305 parse->priv->lead_in_ts < parse->segment.start) {
2306 if (parse->priv->seen_keyframe) {
2307 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2310 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2311 ret = GST_BASE_PARSE_FLOW_DROPPED;
2318 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2319 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2320 gst_buffer_unref (buffer);
2322 } else if (ret == GST_FLOW_OK) {
2323 if (parse->segment.rate > 0.0) {
2324 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2326 ret = gst_pad_push (parse->srcpad, buffer);
2327 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2328 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2330 /* in backwards playback mode, if on passthrough we need to push buffers
2331 * directly without accumulating them into the buffers_queued as baseparse
2332 * will never check for a DISCONT while on passthrough and those buffers
2333 * will never be pushed.
2335 * also, as we are on reverse playback, it might be possible that
2336 * passthrough might have just been enabled, so make sure to drain the
2337 * buffers_queued list */
2338 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2339 gst_base_parse_finish_fragment (parse, TRUE);
2340 ret = gst_base_parse_send_buffers (parse);
2343 if (ret == GST_FLOW_OK) {
2344 GST_LOG_OBJECT (parse,
2345 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2346 ret = gst_pad_push (parse->srcpad, buffer);
2347 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2348 gst_flow_get_name (ret));
2350 GST_LOG_OBJECT (parse,
2351 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2352 gst_flow_get_name (ret));
2353 gst_buffer_unref (buffer);
2357 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2359 parse->priv->buffers_queued =
2360 g_slist_prepend (parse->priv->buffers_queued, buffer);
2364 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2365 size, gst_flow_get_name (ret));
2366 gst_buffer_unref (buffer);
2367 /* if we are not sufficiently in control, let upstream decide on EOS */
2368 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2369 (parse->priv->passthrough ||
2370 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2371 !parse->priv->upstream_seekable)))
2375 /* Update current running segment position */
2376 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2377 parse->segment.position < last_stop)
2378 parse->segment.position = last_stop;
2385 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2386 return GST_FLOW_FLUSHING;
2388 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2389 return GST_FLOW_ERROR;
2394 * gst_base_parse_finish_frame:
2395 * @parse: a #GstBaseParse
2396 * @frame: a #GstBaseParseFrame
2397 * @size: consumed input data represented by frame
2399 * Collects parsed data and pushes this downstream.
2400 * Source pad caps must be set when this is called.
2402 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2403 * Otherwise, @size samples will be taken from the input and used for output,
2404 * and the output's metadata (timestamps etc) will be taken as (optionally)
2405 * set by the subclass on @frame's (input) buffer (which is otherwise
2406 * ignored for any but the above purpose/information).
2408 * Note that the latter buffer is invalidated by this call, whereas the
2409 * caller retains ownership of @frame.
2411 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2414 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2417 GstFlowReturn ret = GST_FLOW_OK;
2419 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2420 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2421 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2422 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2425 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2426 "flushing size %d", frame->offset, size);
2428 /* some one-time start-up */
2429 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2430 gst_base_parse_check_seekability (parse);
2431 gst_base_parse_check_upstream (parse);
2434 parse->priv->flushed += size;
2436 if (parse->priv->scanning && frame->buffer) {
2437 if (!parse->priv->scanned_frame) {
2438 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2443 /* either PUSH or PULL mode arranges for adapter data */
2444 /* ensure output buffer */
2445 if (!frame->out_buffer) {
2446 GstBuffer *src, *dest;
2448 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2449 dest = frame->out_buffer;
2450 src = frame->buffer;
2451 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2452 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2453 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2454 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2455 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2456 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2458 gst_adapter_flush (parse->priv->adapter, size);
2461 /* use as input for subsequent processing */
2462 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2463 gst_buffer_unref (frame->out_buffer);
2464 frame->out_buffer = NULL;
2466 /* mark input size consumed */
2469 /* subclass might queue frames/data internally if it needs more
2470 * frames to decide on the format, or might request us to queue here. */
2471 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2472 gst_buffer_replace (&frame->buffer, NULL);
2474 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2475 GstBaseParseFrame *copy;
2477 copy = gst_base_parse_frame_copy (frame);
2478 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2479 gst_base_parse_queue_frame (parse, copy);
2483 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2489 /* gst_base_parse_drain:
2491 * Drains the adapter until it is empty. It decreases the min_frame_size to
2492 * match the current adapter size and calls chain method until the adapter
2493 * is emptied or chain returns with error.
2496 gst_base_parse_drain (GstBaseParse * parse)
2500 GST_DEBUG_OBJECT (parse, "draining");
2501 parse->priv->drain = TRUE;
2504 avail = gst_adapter_available (parse->priv->adapter);
2508 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2509 NULL) != GST_FLOW_OK) {
2513 /* nothing changed, maybe due to truncated frame; break infinite loop */
2514 if (avail == gst_adapter_available (parse->priv->adapter)) {
2515 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2516 gst_adapter_clear (parse->priv->adapter);
2520 parse->priv->drain = FALSE;
2523 /* gst_base_parse_send_buffers
2525 * Sends buffers collected in send_buffers downstream, and ensures that list
2526 * is empty at the end (errors or not).
2528 static GstFlowReturn
2529 gst_base_parse_send_buffers (GstBaseParse * parse)
2531 GSList *send = NULL;
2533 GstFlowReturn ret = GST_FLOW_OK;
2534 gboolean first = TRUE;
2536 send = parse->priv->buffers_send;
2540 buf = GST_BUFFER_CAST (send->data);
2541 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2542 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2543 ", offset %" G_GINT64_FORMAT, buf,
2544 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2545 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2546 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2548 /* Make sure the first buffer is always DISCONT. If we split
2549 * GOPs inside the parser this is otherwise not guaranteed */
2551 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2555 /* iterate output queue an push downstream */
2556 ret = gst_pad_push (parse->srcpad, buf);
2557 send = g_slist_delete_link (send, send);
2559 /* clear any leftover if error */
2560 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2562 buf = GST_BUFFER_CAST (send->data);
2563 gst_buffer_unref (buf);
2564 send = g_slist_delete_link (send, send);
2569 parse->priv->buffers_send = send;
2574 /* gst_base_parse_start_fragment:
2576 * Prepares for processing a reverse playback (forward) fragment
2577 * by (re)setting proper state variables.
2579 static GstFlowReturn
2580 gst_base_parse_start_fragment (GstBaseParse * parse)
2582 GST_LOG_OBJECT (parse, "starting fragment");
2584 /* invalidate so no fall-back timestamping is performed;
2585 * ok if taken from subclass or upstream */
2586 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2587 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2588 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2589 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2590 /* prevent it hanging around stop all the time */
2591 parse->segment.position = GST_CLOCK_TIME_NONE;
2593 parse->priv->discont = TRUE;
2595 /* head of previous fragment is now pending tail of current fragment */
2596 parse->priv->buffers_pending = parse->priv->buffers_head;
2597 parse->priv->buffers_head = NULL;
2603 /* gst_base_parse_finish_fragment:
2605 * Processes a reverse playback (forward) fragment:
2606 * - append head of last fragment that was skipped to current fragment data
2607 * - drain the resulting current fragment data (i.e. repeated chain)
2608 * - add time/duration (if needed) to frames queued by chain
2609 * - push queued data
2611 static GstFlowReturn
2612 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2615 GstFlowReturn ret = GST_FLOW_OK;
2616 gboolean seen_key = FALSE, seen_delta = FALSE;
2618 GST_LOG_OBJECT (parse, "finishing fragment");
2621 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2622 while (parse->priv->buffers_pending) {
2623 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2625 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2626 gst_buffer_get_size (buf));
2627 gst_adapter_push (parse->priv->adapter, buf);
2629 GST_LOG_OBJECT (parse, "discarding head buffer");
2630 gst_buffer_unref (buf);
2632 parse->priv->buffers_pending =
2633 g_slist_delete_link (parse->priv->buffers_pending,
2634 parse->priv->buffers_pending);
2637 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2638 /* initial skipped data is added to buffers_pending */
2639 gst_base_parse_drain (parse);
2641 if (parse->priv->buffers_send) {
2642 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2643 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2646 /* add metadata (if needed to queued buffers */
2647 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2648 GST_TIME_ARGS (parse->priv->last_pts));
2649 while (parse->priv->buffers_queued) {
2650 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2652 /* no touching if upstream or parsing provided time */
2653 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2654 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2655 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2656 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2657 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2658 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2659 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2661 parse->priv->last_pts = 0;
2662 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2663 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2664 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2666 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2667 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2668 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2670 parse->priv->last_dts = 0;
2671 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2672 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2673 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2676 /* no idea, very bad */
2677 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2680 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2681 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2683 /* reverse order for ascending sending */
2684 /* send downstream at keyframe not preceded by a keyframe
2685 * (e.g. that should identify start of collection of IDR nals) */
2686 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2688 ret = gst_base_parse_send_buffers (parse);
2689 /* if a problem, throw all to sending */
2690 if (ret != GST_FLOW_OK) {
2691 parse->priv->buffers_send =
2692 g_slist_reverse (parse->priv->buffers_queued);
2693 parse->priv->buffers_queued = NULL;
2703 parse->priv->buffers_send =
2704 g_slist_prepend (parse->priv->buffers_send, buf);
2705 parse->priv->buffers_queued =
2706 g_slist_delete_link (parse->priv->buffers_queued,
2707 parse->priv->buffers_queued);
2710 /* audio may have all marked as keyframe, so arrange to send here. Also
2711 * we might have ended the loop above on a keyframe, in which case we
2713 if (!seen_delta || seen_key)
2714 ret = gst_base_parse_send_buffers (parse);
2716 /* any trailing unused no longer usable (ideally none) */
2717 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2718 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2719 gst_adapter_available (parse->priv->adapter));
2720 gst_adapter_clear (parse->priv->adapter);
2726 /* small helper that checks whether we have been trying to resync too long */
2727 static inline GstFlowReturn
2728 gst_base_parse_check_sync (GstBaseParse * parse)
2730 if (G_UNLIKELY (parse->priv->discont &&
2731 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2732 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2733 ("Failed to parse stream"), (NULL));
2734 return GST_FLOW_ERROR;
2740 static GstFlowReturn
2741 gst_base_parse_process_streamheader (GstBaseParse * parse)
2745 const GValue *value;
2746 GstFlowReturn ret = GST_FLOW_OK;
2748 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2752 str = gst_caps_get_structure (caps, 0);
2753 value = gst_structure_get_value (str, "streamheader");
2757 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2759 if (GST_VALUE_HOLDS_ARRAY (value)) {
2761 gsize len = gst_value_array_get_size (value);
2763 for (i = 0; i < len; i++) {
2765 gst_value_get_buffer (gst_value_array_get_value (value, i));
2767 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2768 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2771 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2772 GstBuffer *buffer = gst_value_get_buffer (value);
2774 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2775 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2778 gst_caps_unref (caps);
2785 gst_caps_unref (caps);
2788 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2793 static GstFlowReturn
2794 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2796 GstBaseParseClass *bclass;
2797 GstBaseParse *parse;
2798 GstFlowReturn ret = GST_FLOW_OK;
2799 GstFlowReturn old_ret = GST_FLOW_OK;
2800 GstBuffer *tmpbuf = NULL;
2805 GstClockTime pts, dts;
2807 parse = GST_BASE_PARSE (parent);
2808 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2809 GST_DEBUG_OBJECT (parent, "chain");
2811 /* early out for speed, if we need to skip */
2812 if (parse->priv->skip > 0) {
2813 gsize bsize = gst_buffer_get_size (buffer);
2814 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2816 if (parse->priv->skip >= bsize) {
2817 parse->priv->skip -= bsize;
2818 GST_DEBUG ("All the buffer is skipped");
2819 parse->priv->offset += bsize;
2820 parse->priv->sync_offset = parse->priv->offset;
2823 buffer = gst_buffer_make_writable (buffer);
2824 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2825 parse->priv->offset += parse->priv->skip;
2826 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2827 (unsigned) (bsize - parse->priv->skip));
2828 parse->priv->skip = 0;
2829 parse->priv->discont = TRUE;
2832 if (G_UNLIKELY (parse->priv->first_buffer)) {
2833 parse->priv->first_buffer = FALSE;
2834 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2835 /* this stream has no header buffers, check if we just prepend the
2836 * streamheader from caps to the stream */
2837 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2838 "prepend to the stream");
2839 gst_base_parse_process_streamheader (parse);
2841 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2842 "streamheader from caps");
2846 if (parse->priv->detecting) {
2847 GstBuffer *detect_buf;
2849 if (parse->priv->detect_buffers_size == 0) {
2850 detect_buf = gst_buffer_ref (buffer);
2855 detect_buf = gst_buffer_new ();
2857 for (l = parse->priv->detect_buffers; l; l = l->next) {
2858 gsize tmpsize = gst_buffer_get_size (l->data);
2860 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2861 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2865 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2866 offset, gst_buffer_get_size (buffer));
2869 ret = bclass->detect (parse, detect_buf);
2870 gst_buffer_unref (detect_buf);
2872 if (ret == GST_FLOW_OK) {
2875 /* Detected something */
2876 parse->priv->detecting = FALSE;
2878 for (l = parse->priv->detect_buffers; l; l = l->next) {
2879 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2881 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2882 parent, GST_BUFFER_CAST (l->data));
2884 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2886 g_list_free (parse->priv->detect_buffers);
2887 parse->priv->detect_buffers = NULL;
2888 parse->priv->detect_buffers_size = 0;
2890 if (ret != GST_FLOW_OK) {
2894 /* Handle the current buffer */
2895 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2896 /* Still detecting, append buffer or error out if draining */
2898 if (parse->priv->drain) {
2899 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2900 return GST_FLOW_ERROR;
2901 } else if (parse->priv->flushing) {
2902 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2904 g_list_free (parse->priv->detect_buffers);
2905 parse->priv->detect_buffers = NULL;
2906 parse->priv->detect_buffers_size = 0;
2908 parse->priv->detect_buffers =
2909 g_list_append (parse->priv->detect_buffers, buffer);
2910 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2914 /* Something went wrong, subclass responsible for error reporting */
2918 /* And now handle the current buffer if detection worked */
2921 if (G_LIKELY (buffer)) {
2922 GST_LOG_OBJECT (parse,
2923 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2924 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2925 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2926 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2927 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2929 if (G_UNLIKELY (!parse->priv->disable_passthrough
2930 && parse->priv->passthrough)) {
2931 GstBaseParseFrame frame;
2933 gst_base_parse_frame_init (&frame);
2934 frame.buffer = gst_buffer_make_writable (buffer);
2935 ret = gst_base_parse_push_frame (parse, &frame);
2936 gst_base_parse_frame_free (&frame);
2939 /* upstream feeding us in reverse playback;
2940 * finish previous fragment and start new upon DISCONT */
2941 if (parse->segment.rate < 0.0) {
2942 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2943 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2944 ret = gst_base_parse_finish_fragment (parse, TRUE);
2945 gst_base_parse_start_fragment (parse);
2948 gst_adapter_push (parse->priv->adapter, buffer);
2951 /* Parse and push as many frames as possible */
2952 /* Stop either when adapter is empty or we are flushing */
2953 while (!parse->priv->flushing) {
2956 /* note: if subclass indicates MAX fsize,
2957 * this will not likely be available anyway ... */
2958 min_size = MAX (parse->priv->min_frame_size, fsize);
2959 av = gst_adapter_available (parse->priv->adapter);
2961 if (G_UNLIKELY (parse->priv->drain)) {
2963 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2964 if (G_UNLIKELY (!min_size)) {
2969 /* Collect at least min_frame_size bytes */
2970 if (av < min_size) {
2971 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2975 /* move along with upstream timestamp (if any),
2976 * but interpolate in between */
2977 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2978 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2979 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2980 parse->priv->prev_pts = parse->priv->next_pts = pts;
2982 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2983 parse->priv->prev_dts = parse->priv->next_dts = dts;
2985 /* we can mess with, erm interpolate, timestamps,
2986 * and incoming stuff has PTS but no DTS seen so far,
2987 * then pick up DTS from PTS and hope for the best ... */
2988 if (parse->priv->infer_ts &&
2989 parse->priv->pts_interpolate &&
2990 !GST_CLOCK_TIME_IS_VALID (dts) &&
2991 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
2992 GST_CLOCK_TIME_IS_VALID (pts))
2993 parse->priv->next_dts = pts;
2995 /* always pass all available data */
2996 data = gst_adapter_map (parse->priv->adapter, av);
2997 /* arrange for actual data to be copied if subclass tries to,
2998 * since what is passed is tied to the adapter */
2999 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
3000 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
3002 /* already inform subclass what timestamps we have planned,
3003 * at least if provided by time-based upstream */
3004 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3005 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3006 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3009 /* keep the adapter mapped, so keep track of what has to be flushed */
3010 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3013 /* probably already implicitly unmapped due to adapter operation,
3014 * but for good measure ... */
3015 gst_adapter_unmap (parse->priv->adapter);
3016 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3019 if (skip == 0 && flush == 0) {
3020 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3021 "breaking to get more data");
3022 /* ignore this return as it produced no data */
3030 GST_LOG_OBJECT (parse, "chain leaving");
3034 /* pull @size bytes at current offset,
3035 * i.e. at least try to and possibly return a shorter buffer if near the end */
3036 static GstFlowReturn
3037 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3038 GstBuffer ** buffer)
3040 GstFlowReturn ret = GST_FLOW_OK;
3042 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3044 /* Caching here actually makes much less difference than one would expect.
3045 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3046 if (parse->priv->cache) {
3047 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3048 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3050 if (cache_offset <= parse->priv->offset &&
3051 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3052 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3053 parse->priv->offset - cache_offset, size);
3054 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3057 /* not enough data in the cache, free cache and get a new one */
3058 gst_buffer_unref (parse->priv->cache);
3059 parse->priv->cache = NULL;
3062 /* refill the cache */
3064 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3065 64 * 1024), &parse->priv->cache);
3066 if (ret != GST_FLOW_OK) {
3067 parse->priv->cache = NULL;
3071 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3073 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3075 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3079 /* Not possible to get enough data, try a last time with
3080 * requesting exactly the size we need */
3081 gst_buffer_unref (parse->priv->cache);
3082 parse->priv->cache = NULL;
3084 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3085 &parse->priv->cache);
3087 if (ret != GST_FLOW_OK) {
3088 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3093 if (gst_buffer_get_size (parse->priv->cache) < size) {
3094 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3095 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3096 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3098 *buffer = parse->priv->cache;
3099 parse->priv->cache = NULL;
3105 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3106 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3111 static GstFlowReturn
3112 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3115 GstClockTime ts = 0;
3119 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3120 ", last_offset = %" G_GINT64_FORMAT,
3121 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3123 if (!parse->priv->last_offset
3124 || parse->priv->last_pts <= parse->segment.start) {
3125 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3126 GST_TIME_ARGS (parse->segment.start));
3131 /* last fragment started at last_offset / last_ts;
3132 * seek back 10s capped at 1MB */
3133 if (parse->priv->last_pts >= 10 * GST_SECOND)
3134 ts = parse->priv->last_pts - 10 * GST_SECOND;
3135 /* if we are exact now, we will be more so going backwards */
3136 if (parse->priv->exact_position) {
3137 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3139 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3140 GST_FORMAT_BYTES, &offset)) {
3141 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3144 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3145 parse->priv->last_offset - 1024);
3146 offset = MAX (0, offset);
3148 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3150 parse->priv->offset = offset;
3152 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3154 if (ret != GST_FLOW_OK)
3157 /* offset will increase again as fragment is processed/parsed */
3158 parse->priv->last_offset = offset;
3160 gst_base_parse_start_fragment (parse);
3161 gst_adapter_push (parse->priv->adapter, buffer);
3162 ret = gst_base_parse_finish_fragment (parse, TRUE);
3163 if (ret != GST_FLOW_OK)
3166 /* force previous fragment */
3167 parse->priv->offset = -1;
3174 * pull and scan for next frame starting from current offset
3175 * ajusts sync, drain and offset going along */
3176 static GstFlowReturn
3177 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3180 GstFlowReturn ret = GST_FLOW_OK;
3181 guint fsize, min_size;
3185 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3186 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3188 /* let's make this efficient for all subclass once and for all;
3189 * maybe it does not need this much, but in the latter case, we know we are
3190 * in pull mode here and might as well try to read and supply more anyway
3191 * (so does the buffer caching mechanism) */
3195 min_size = MAX (parse->priv->min_frame_size, fsize);
3197 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3199 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3200 if (ret != GST_FLOW_OK)
3203 /* if we got a short read, inform subclass we are draining leftover
3204 * and no more is to be expected */
3205 if (gst_buffer_get_size (buffer) < min_size) {
3206 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3207 parse->priv->drain = TRUE;
3210 if (parse->priv->detecting) {
3211 ret = klass->detect (parse, buffer);
3212 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3213 /* If draining we error out, otherwise request a buffer
3215 if (parse->priv->drain) {
3216 gst_buffer_unref (buffer);
3217 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3218 return GST_FLOW_ERROR;
3221 gst_buffer_unref (buffer);
3224 } else if (ret != GST_FLOW_OK) {
3225 gst_buffer_unref (buffer);
3226 GST_ERROR_OBJECT (parse, "detect() returned %s",
3227 gst_flow_get_name (ret));
3231 /* Else handle this buffer normally */
3234 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3235 if (ret != GST_FLOW_OK)
3238 /* If a large amount of data was requested to be skipped, _handle_buffer
3239 might have set the priv->skip flag to an extra amount on top of skip.
3240 In pull mode, we can just pull from the new offset directly. */
3241 parse->priv->offset += parse->priv->skip;
3242 parse->priv->skip = 0;
3244 /* something flushed means something happened,
3245 * and we should bail out of this loop so as not to occupy
3246 * the task thread indefinitely */
3248 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3251 /* nothing flushed, no skip and draining, so nothing left to do */
3252 if (!skip && parse->priv->drain) {
3253 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3254 "breaking loop and marking EOS");
3258 /* otherwise, get some more data
3259 * note that is checked this does not happen indefinitely */
3261 GST_LOG_OBJECT (parse, "getting some more data");
3264 parse->priv->drain = FALSE;
3271 /* Loop that is used in pull mode to retrieve data from upstream */
3273 gst_base_parse_loop (GstPad * pad)
3275 GstBaseParse *parse;
3276 GstBaseParseClass *klass;
3277 GstFlowReturn ret = GST_FLOW_OK;
3279 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3280 klass = GST_BASE_PARSE_GET_CLASS (parse);
3282 GST_LOG_OBJECT (parse, "Entering parse loop");
3284 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3289 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3292 event = gst_event_new_stream_start (stream_id);
3293 gst_event_set_group_id (event, gst_util_group_id_next ());
3295 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3296 gst_pad_push_event (parse->srcpad, event);
3297 parse->priv->push_stream_start = FALSE;
3301 /* reverse playback:
3302 * first fragment (closest to stop time) is handled normally below,
3303 * then we pull in fragments going backwards */
3304 if (parse->segment.rate < 0.0) {
3305 /* check if we jumped back to a previous fragment,
3306 * which is a post-first fragment */
3307 if (parse->priv->offset < 0) {
3308 ret = gst_base_parse_handle_previous_fragment (parse);
3313 ret = gst_base_parse_scan_frame (parse, klass);
3314 if (ret != GST_FLOW_OK)
3317 /* eat expected eos signalling past segment in reverse playback */
3318 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3319 parse->segment.position >= parse->segment.stop) {
3320 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3321 /* push what was accumulated during loop run */
3322 gst_base_parse_finish_fragment (parse, FALSE);
3323 /* force previous fragment */
3324 parse->priv->offset = -1;
3329 if (ret == GST_FLOW_EOS)
3331 else if (ret != GST_FLOW_OK)
3334 gst_object_unref (parse);
3341 GST_DEBUG_OBJECT (parse, "eos");
3346 gboolean push_eos = FALSE;
3348 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3349 gst_flow_get_name (ret));
3350 gst_pad_pause_task (parse->sinkpad);
3352 if (ret == GST_FLOW_EOS) {
3353 /* handle end-of-stream/segment */
3354 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3357 if ((stop = parse->segment.stop) == -1)
3358 stop = parse->segment.duration;
3360 GST_DEBUG_OBJECT (parse, "sending segment_done");
3362 gst_element_post_message
3363 (GST_ELEMENT_CAST (parse),
3364 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3365 GST_FORMAT_TIME, stop));
3366 gst_pad_push_event (parse->srcpad,
3367 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3369 /* If we STILL have zero frames processed, fire an error */
3370 if (parse->priv->framecount == 0) {
3371 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3372 ("No valid frames found before end of stream"), (NULL));
3376 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3377 /* for fatal errors we post an error message, wrong-state is
3378 * not fatal because it happens due to flushes and only means
3379 * that we should stop now. */
3380 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3381 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3385 /* Push pending events, including SEGMENT events */
3386 gst_base_parse_push_pending_events (parse);
3388 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3390 gst_object_unref (parse);
3395 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3397 GstSchedulingFlags sched_flags;
3398 GstBaseParse *parse;
3402 parse = GST_BASE_PARSE (parent);
3404 GST_DEBUG_OBJECT (parse, "sink activate");
3406 query = gst_query_new_scheduling ();
3407 if (!gst_pad_peer_query (sinkpad, query)) {
3408 gst_query_unref (query);
3409 goto baseparse_push;
3412 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3414 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3415 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3417 gst_query_unref (query);
3420 goto baseparse_push;
3422 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3423 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3424 goto baseparse_push;
3426 parse->priv->push_stream_start = TRUE;
3428 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3433 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3434 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3439 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3441 GstBaseParseClass *klass;
3442 gboolean result = TRUE;
3444 GST_DEBUG_OBJECT (parse, "activate %d", active);
3446 klass = GST_BASE_PARSE_GET_CLASS (parse);
3449 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3450 result = klass->start (parse);
3452 /* If the subclass implements ::detect we want to
3453 * call it for the first buffers now */
3454 parse->priv->detecting = (klass->detect != NULL);
3456 /* We must make sure streaming has finished before resetting things
3457 * and calling the ::stop vfunc */
3458 GST_PAD_STREAM_LOCK (parse->sinkpad);
3459 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3461 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3462 result = klass->stop (parse);
3464 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3466 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3471 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3472 GstPadMode mode, gboolean active)
3475 GstBaseParse *parse;
3477 parse = GST_BASE_PARSE (parent);
3479 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3480 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3482 if (!gst_base_parse_activate (parse, active))
3483 goto activate_failed;
3486 case GST_PAD_MODE_PULL:
3488 parse->priv->pending_events =
3489 g_list_prepend (parse->priv->pending_events,
3490 gst_event_new_segment (&parse->segment));
3493 result = gst_pad_stop_task (pad);
3501 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3503 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3510 GST_DEBUG_OBJECT (parse, "activate failed");
3516 * gst_base_parse_set_duration:
3517 * @parse: #GstBaseParse.
3519 * @duration: duration value.
3520 * @interval: how often to update the duration estimate based on bitrate, or 0.
3522 * Sets the duration of the currently playing media. Subclass can use this
3523 * when it is able to determine duration and/or notices a change in the media
3524 * duration. Alternatively, if @interval is non-zero (default), then stream
3525 * duration is determined based on estimated bitrate, and updated every @interval
3529 gst_base_parse_set_duration (GstBaseParse * parse,
3530 GstFormat fmt, gint64 duration, gint interval)
3532 g_return_if_fail (parse != NULL);
3534 if (parse->priv->upstream_has_duration) {
3535 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3539 if (duration != parse->priv->duration) {
3542 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3543 gst_element_post_message (GST_ELEMENT (parse), m);
3545 /* TODO: what about duration tag? */
3547 parse->priv->duration = duration;
3548 parse->priv->duration_fmt = fmt;
3549 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3550 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3551 if (interval != 0) {
3552 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3556 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3557 parse->priv->update_interval = interval;
3563 * gst_base_parse_set_average_bitrate:
3564 * @parse: #GstBaseParse.
3565 * @bitrate: average bitrate in bits/second
3567 * Optionally sets the average bitrate detected in media (if non-zero),
3568 * e.g. based on metadata, as it will be posted to the application.
3570 * By default, announced average bitrate is estimated. The average bitrate
3571 * is used to estimate the total duration of the stream and to estimate
3572 * a seek position, if there's no index and the format is syncable
3573 * (see gst_base_parse_set_syncable()).
3576 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3578 parse->priv->bitrate = bitrate;
3579 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3583 * gst_base_parse_set_min_frame_size:
3584 * @parse: #GstBaseParse.
3585 * @min_size: Minimum size of the data that this base class should give to
3588 * Subclass can use this function to tell the base class that it needs to
3589 * give at least #min_size buffers.
3592 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3594 g_return_if_fail (parse != NULL);
3596 parse->priv->min_frame_size = min_size;
3597 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3601 * gst_base_parse_set_frame_rate:
3602 * @parse: the #GstBaseParse to set
3603 * @fps_num: frames per second (numerator).
3604 * @fps_den: frames per second (denominator).
3605 * @lead_in: frames needed before a segment for subsequent decode
3606 * @lead_out: frames needed after a segment
3608 * If frames per second is configured, parser can take care of buffer duration
3609 * and timestamping. When performing segment clipping, or seeking to a specific
3610 * location, a corresponding decoder might need an initial @lead_in and a
3611 * following @lead_out number of frames to ensure the desired segment is
3612 * entirely filled upon decoding.
3615 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3616 guint fps_den, guint lead_in, guint lead_out)
3618 g_return_if_fail (parse != NULL);
3620 parse->priv->fps_num = fps_num;
3621 parse->priv->fps_den = fps_den;
3622 if (!fps_num || !fps_den) {
3623 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3625 fps_num = fps_den = 0;
3626 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3627 parse->priv->lead_in = parse->priv->lead_out = 0;
3628 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3630 parse->priv->frame_duration =
3631 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3632 parse->priv->lead_in = lead_in;
3633 parse->priv->lead_out = lead_out;
3634 parse->priv->lead_in_ts =
3635 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3636 parse->priv->lead_out_ts =
3637 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3638 /* aim for about 1.5s to estimate duration */
3639 if (parse->priv->update_interval < 0) {
3640 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3641 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3642 parse->priv->update_interval);
3645 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3646 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3647 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3648 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3649 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3650 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3654 * gst_base_parse_set_has_timing_info:
3655 * @parse: a #GstBaseParse
3656 * @has_timing: whether frames carry timing information
3658 * Set if frames carry timing information which the subclass can (generally)
3659 * parse and provide. In particular, intrinsic (rather than estimated) time
3660 * can be obtained following a seek.
3663 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3665 parse->priv->has_timing_info = has_timing;
3666 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3670 * gst_base_parse_set_syncable:
3671 * @parse: a #GstBaseParse
3672 * @syncable: set if frame starts can be identified
3674 * Set if frame starts can be identified. This is set by default and
3675 * determines whether seeking based on bitrate averages
3676 * is possible for a format/stream.
3679 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3681 parse->priv->syncable = syncable;
3682 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3686 * gst_base_parse_set_passthrough:
3687 * @parse: a #GstBaseParse
3688 * @passthrough: %TRUE if parser should run in passthrough mode
3690 * Set if the nature of the format or configuration does not allow (much)
3691 * parsing, and the parser should operate in passthrough mode (which only
3692 * applies when operating in push mode). That is, incoming buffers are
3693 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3694 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3695 * so subclass can perform as much or as little is appropriate for
3696 * passthrough semantics in @pre_push_frame.
3699 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3701 parse->priv->passthrough = passthrough;
3702 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3706 * gst_base_parse_set_pts_interpolation:
3707 * @parse: a #GstBaseParse
3708 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3710 * By default, the base class will guess PTS timestamps using a simple
3711 * interpolation (previous timestamp + duration), which is incorrect for
3712 * data streams with reordering, where PTS can go backward. Sub-classes
3713 * implementing such formats should disable PTS interpolation.
3716 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3717 gboolean pts_interpolate)
3719 parse->priv->pts_interpolate = pts_interpolate;
3720 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3721 (pts_interpolate) ? "yes" : "no");
3725 * gst_base_parse_set_infer_ts:
3726 * @parse: a #GstBaseParse
3727 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3729 * By default, the base class might try to infer PTS from DTS and vice
3730 * versa. While this is generally correct for audio data, it may not
3731 * be otherwise. Sub-classes implementing such formats should disable
3732 * timestamp inferring.
3735 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3737 parse->priv->infer_ts = infer_ts;
3738 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3742 * gst_base_parse_set_latency:
3743 * @parse: a #GstBaseParse
3744 * @min_latency: minimum parse latency
3745 * @max_latency: maximum parse latency
3747 * Sets the minimum and maximum (which may likely be equal) latency introduced
3748 * by the parsing process. If there is such a latency, which depends on the
3749 * particular parsing of the format, it typically corresponds to 1 frame duration.
3752 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3753 GstClockTime max_latency)
3755 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3756 g_return_if_fail (min_latency <= max_latency);
3758 GST_OBJECT_LOCK (parse);
3759 parse->priv->min_latency = min_latency;
3760 parse->priv->max_latency = max_latency;
3761 GST_OBJECT_UNLOCK (parse);
3762 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3763 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3764 GST_TIME_ARGS (max_latency));
3768 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3769 GstClockTime * duration)
3771 gboolean res = FALSE;
3773 g_return_val_if_fail (duration != NULL, FALSE);
3775 *duration = GST_CLOCK_TIME_NONE;
3776 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3777 GST_LOG_OBJECT (parse, "using provided duration");
3778 *duration = parse->priv->duration;
3780 } else if (parse->priv->duration != -1) {
3781 GST_LOG_OBJECT (parse, "converting provided duration");
3782 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3783 parse->priv->duration, format, (gint64 *) duration);
3784 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3785 GST_LOG_OBJECT (parse, "using estimated duration");
3786 *duration = parse->priv->estimated_duration;
3789 GST_LOG_OBJECT (parse, "cannot estimate duration");
3792 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3793 GST_TIME_ARGS (*duration));
3798 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3800 gboolean res = FALSE;
3803 pad = GST_BASE_PARSE_SRC_PAD (parse);
3805 switch (GST_QUERY_TYPE (query)) {
3806 case GST_QUERY_POSITION:
3811 GST_DEBUG_OBJECT (parse, "position query");
3812 gst_query_parse_position (query, &format, NULL);
3814 /* try upstream first */
3815 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3817 /* Fall back on interpreting segment */
3818 GST_OBJECT_LOCK (parse);
3819 if (format == GST_FORMAT_BYTES) {
3820 dest_value = parse->priv->offset;
3822 } else if (format == parse->segment.format &&
3823 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3824 dest_value = gst_segment_to_stream_time (&parse->segment,
3825 parse->segment.format, parse->segment.position);
3828 GST_OBJECT_UNLOCK (parse);
3830 /* no precise result, upstream no idea either, then best estimate */
3831 /* priv->offset is updated in both PUSH/PULL modes */
3832 res = gst_base_parse_convert (parse,
3833 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3836 gst_query_set_position (query, format, dest_value);
3840 case GST_QUERY_DURATION:
3843 GstClockTime duration;
3845 GST_DEBUG_OBJECT (parse, "duration query");
3846 gst_query_parse_duration (query, &format, NULL);
3848 /* consult upstream */
3849 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3851 /* otherwise best estimate from us */
3853 res = gst_base_parse_get_duration (parse, format, &duration);
3855 gst_query_set_duration (query, format, duration);
3859 case GST_QUERY_SEEKING:
3862 GstClockTime duration = GST_CLOCK_TIME_NONE;
3863 gboolean seekable = FALSE;
3865 GST_DEBUG_OBJECT (parse, "seeking query");
3866 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3868 /* consult upstream */
3869 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3871 /* we may be able to help if in TIME */
3872 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3873 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3874 /* already OK if upstream takes care */
3875 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3877 if (!(res && seekable)) {
3878 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3879 || duration == -1) {
3880 /* seekable if we still have a chance to get duration later on */
3882 parse->priv->upstream_seekable && parse->priv->update_interval;
3884 seekable = parse->priv->upstream_seekable;
3885 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3888 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3894 case GST_QUERY_FORMATS:
3895 gst_query_set_formatsv (query, 3, fmtlist);
3898 case GST_QUERY_CONVERT:
3900 GstFormat src_format, dest_format;
3901 gint64 src_value, dest_value;
3903 gst_query_parse_convert (query, &src_format, &src_value,
3904 &dest_format, &dest_value);
3906 res = gst_base_parse_convert (parse, src_format, src_value,
3907 dest_format, &dest_value);
3909 gst_query_set_convert (query, src_format, src_value,
3910 dest_format, dest_value);
3914 case GST_QUERY_LATENCY:
3916 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3918 GstClockTime min_latency, max_latency;
3920 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3921 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3922 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3923 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3925 GST_OBJECT_LOCK (parse);
3926 /* add our latency */
3927 min_latency += parse->priv->min_latency;
3928 if (max_latency == -1 || parse->priv->max_latency == -1)
3931 max_latency += parse->priv->max_latency;
3932 GST_OBJECT_UNLOCK (parse);
3934 gst_query_set_latency (query, live, min_latency, max_latency);
3938 case GST_QUERY_SEGMENT:
3943 format = parse->segment.format;
3946 gst_segment_to_stream_time (&parse->segment, format,
3947 parse->segment.start);
3948 if ((stop = parse->segment.stop) == -1)
3949 stop = parse->segment.duration;
3951 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3953 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3958 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3964 /* scans for a cluster start from @pos,
3965 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3966 static GstFlowReturn
3967 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3968 GstClockTime * time, GstClockTime * duration)
3970 GstBaseParseClass *klass;
3972 gboolean orig_drain, orig_discont;
3973 GstFlowReturn ret = GST_FLOW_OK;
3974 GstBuffer *buf = NULL;
3975 GstBaseParseFrame *sframe = NULL;
3977 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3978 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3979 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3981 klass = GST_BASE_PARSE_GET_CLASS (parse);
3983 *time = GST_CLOCK_TIME_NONE;
3984 *duration = GST_CLOCK_TIME_NONE;
3987 orig_offset = parse->priv->offset;
3988 orig_discont = parse->priv->discont;
3989 orig_drain = parse->priv->drain;
3991 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3992 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3994 /* jump elsewhere and locate next frame */
3995 parse->priv->offset = *pos;
3996 /* mark as scanning so frames don't get processed all the way */
3997 parse->priv->scanning = TRUE;
3998 ret = gst_base_parse_scan_frame (parse, klass);
3999 parse->priv->scanning = FALSE;
4000 /* retrieve frame found during scan */
4001 sframe = parse->priv->scanned_frame;
4002 parse->priv->scanned_frame = NULL;
4004 if (ret != GST_FLOW_OK || !sframe)
4007 /* get offset first, subclass parsing might dump other stuff in there */
4008 *pos = sframe->offset;
4009 buf = sframe->buffer;
4012 /* but it should provide proper time */
4013 *time = GST_BUFFER_TIMESTAMP (buf);
4014 *duration = GST_BUFFER_DURATION (buf);
4016 GST_LOG_OBJECT (parse,
4017 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4018 GST_TIME_ARGS (*time), *pos);
4022 gst_base_parse_frame_free (sframe);
4025 parse->priv->offset = orig_offset;
4026 parse->priv->discont = orig_discont;
4027 parse->priv->drain = orig_drain;
4032 /* bisect and scan through file for frame starting before @time,
4033 * returns OK and @time/@offset if found, NONE and/or error otherwise
4034 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4035 static GstFlowReturn
4036 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4039 GstFlowReturn ret = GST_FLOW_OK;
4040 gint64 lpos, hpos, newpos;
4041 GstClockTime time, ltime, htime, newtime, dur;
4042 gboolean cont = TRUE;
4043 const GstClockTime tolerance = TARGET_DIFFERENCE;
4044 const guint chunk = 4 * 1024;
4046 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4047 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4049 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4050 GST_TIME_ARGS (*_time));
4052 /* TODO also make keyframe aware if useful some day */
4067 /* do not know at first */
4069 *_time = GST_CLOCK_TIME_NONE;
4071 /* need initial positions; start and end */
4072 lpos = parse->priv->first_frame_offset;
4073 ltime = parse->priv->first_frame_pts;
4074 /* try other one if no luck */
4075 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4076 ltime = parse->priv->first_frame_dts;
4077 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4078 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4079 return GST_FLOW_ERROR;
4081 hpos = parse->priv->upstream_size;
4083 GST_DEBUG_OBJECT (parse,
4084 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4085 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4086 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4088 /* check preconditions are satisfied;
4089 * start and end are needed, except for special case where we scan for
4090 * last frame to determine duration */
4091 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4092 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4093 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4097 /* shortcut cases */
4100 } else if (time < ltime + tolerance) {
4104 } else if (time >= htime) {
4110 while (htime > ltime && cont) {
4111 GST_LOG_OBJECT (parse,
4112 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4113 GST_TIME_ARGS (ltime));
4114 GST_LOG_OBJECT (parse,
4115 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4116 GST_TIME_ARGS (htime));
4117 if (G_UNLIKELY (time == G_MAXINT64)) {
4119 } else if (G_LIKELY (hpos > lpos)) {
4121 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4124 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4126 /* we check this case once, but not forever, so break loop */
4131 newpos = CLAMP (newpos, lpos, hpos);
4132 GST_LOG_OBJECT (parse,
4133 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4134 GST_TIME_ARGS (time), newpos);
4136 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4137 if (ret == GST_FLOW_EOS) {
4138 /* heuristic HACK */
4139 hpos = MAX (lpos, hpos - chunk);
4141 } else if (ret != GST_FLOW_OK) {
4145 if (newtime == -1 || newpos == -1) {
4146 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4150 if (G_UNLIKELY (time == G_MAXINT64)) {
4153 if (GST_CLOCK_TIME_IS_VALID (dur))
4156 } else if (newtime > time) {
4158 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4160 } else if (newtime + tolerance > time) {
4161 /* close enough undershoot */
4165 } else if (newtime < ltime) {
4166 /* so a position beyond lpos resulted in earlier time than ltime ... */
4167 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4170 /* undershoot too far */
4171 newpos += newpos == lpos ? chunk : 0;
4172 lpos = CLAMP (newpos, lpos, hpos);
4178 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4179 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4184 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4185 gboolean before, GstClockTime * _ts)
4187 gint64 bytes = 0, ts = 0;
4188 GstIndexEntry *entry = NULL;
4190 if (time == GST_CLOCK_TIME_NONE) {
4196 GST_BASE_PARSE_INDEX_LOCK (parse);
4197 if (parse->priv->index) {
4198 /* Let's check if we have an index entry for that time */
4199 entry = gst_index_get_assoc_entry (parse->priv->index,
4200 parse->priv->index_id,
4201 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4202 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4206 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4207 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4209 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4210 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4211 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4213 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4214 GST_TIME_ARGS (time));
4217 ts = GST_CLOCK_TIME_NONE;
4220 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4229 /* returns TRUE if seek succeeded */
4231 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4236 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4237 gboolean flush, update, res = TRUE, accurate;
4238 gint64 start, stop, seekpos, seekstop;
4239 GstSegment seeksegment = { 0, };
4240 GstClockTime start_ts;
4242 GstEvent *segment_event;
4244 /* try upstream first, unless we're driving the streaming thread ourselves */
4245 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4246 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4251 gst_event_parse_seek (event, &rate, &format, &flags,
4252 &start_type, &start, &stop_type, &stop);
4253 seqnum = gst_event_get_seqnum (event);
4255 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4256 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4257 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4258 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4260 /* we can only handle TIME, so check if subclass can convert
4261 * to TIME format if it's some other format (such as DEFAULT) */
4262 if (format != GST_FORMAT_TIME) {
4263 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4264 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4266 goto no_convert_to_time;
4268 GST_INFO_OBJECT (parse, "converted %s format to start time "
4269 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4270 gst_format_get_name (format), GST_TIME_ARGS (start),
4271 GST_TIME_ARGS (stop));
4273 format = GST_FORMAT_TIME;
4276 /* no negative rates in push mode (unless upstream takes care of that, but
4277 * we've already tried upstream and it didn't handle the seek request) */
4278 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4281 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4282 goto negative_rate_pull_mode;
4284 if (start_type != GST_SEEK_TYPE_SET ||
4285 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4288 /* get flush flag */
4289 flush = flags & GST_SEEK_FLAG_FLUSH;
4291 /* copy segment, we need this because we still need the old
4292 * segment when we close the current segment. */
4293 gst_segment_copy_into (&parse->segment, &seeksegment);
4295 GST_DEBUG_OBJECT (parse, "configuring seek");
4296 gst_segment_do_seek (&seeksegment, rate, format, flags,
4297 start_type, start, stop_type, stop, &update);
4299 /* accurate seeking implies seek tables are used to obtain position,
4300 * and the requested segment is maintained exactly, not adjusted any way */
4301 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4303 /* maybe we can be accurate for (almost) free */
4304 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4305 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4306 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4310 GstClockTime startpos = seeksegment.position;
4312 /* accurate requested, so ... seek a bit before target */
4313 if (startpos < parse->priv->lead_in_ts)
4316 startpos -= parse->priv->lead_in_ts;
4317 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4318 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4321 start_ts = seeksegment.position;
4322 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4323 GST_FORMAT_BYTES, &seekpos))
4324 goto convert_failed;
4325 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4326 GST_FORMAT_BYTES, &seekstop))
4327 goto convert_failed;
4330 GST_DEBUG_OBJECT (parse,
4331 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4333 GST_DEBUG_OBJECT (parse,
4334 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4335 seeksegment.stop, seekstop);
4337 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4340 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4343 if (parse->srcpad) {
4344 GstEvent *fevent = gst_event_new_flush_start ();
4345 GST_DEBUG_OBJECT (parse, "sending flush start");
4347 gst_event_set_seqnum (fevent, seqnum);
4349 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4350 /* unlock upstream pull_range */
4351 gst_pad_push_event (parse->sinkpad, fevent);
4354 gst_pad_pause_task (parse->sinkpad);
4357 /* we should now be able to grab the streaming thread because we stopped it
4358 * with the above flush/pause code */
4359 GST_PAD_STREAM_LOCK (parse->sinkpad);
4361 /* save current position */
4362 last_stop = parse->segment.position;
4363 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4366 /* now commit to new position */
4368 /* prepare for streaming again */
4370 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4371 GST_DEBUG_OBJECT (parse, "sending flush stop");
4372 gst_event_set_seqnum (fevent, seqnum);
4373 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4374 gst_pad_push_event (parse->sinkpad, fevent);
4375 gst_base_parse_clear_queues (parse);
4377 /* keep track of our position */
4378 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4379 seeksegment.format, parse->segment.position);
4382 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4384 /* store the newsegment event so it can be sent from the streaming thread. */
4385 /* This will be sent later in _loop() */
4386 segment_event = gst_event_new_segment (&parse->segment);
4387 gst_event_set_seqnum (segment_event, seqnum);
4388 parse->priv->pending_events =
4389 g_list_prepend (parse->priv->pending_events, segment_event);
4391 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4392 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4393 ", time = %" GST_TIME_FORMAT, format,
4394 GST_TIME_ARGS (parse->segment.start),
4395 GST_TIME_ARGS (parse->segment.stop),
4396 GST_TIME_ARGS (parse->segment.time));
4398 /* one last chance in pull mode to stay accurate;
4399 * maybe scan and subclass can find where to go */
4402 GstClockTime ts = seeksegment.position;
4404 gst_base_parse_locate_time (parse, &ts, &scanpos);
4408 /* running collected index now consists of several intervals,
4409 * so optimized check no longer possible */
4410 parse->priv->index_last_valid = FALSE;
4411 parse->priv->index_last_offset = 0;
4412 parse->priv->index_last_ts = 0;
4416 /* mark discont if we are going to stream from another position. */
4417 if (seekpos != parse->priv->offset) {
4418 GST_DEBUG_OBJECT (parse,
4419 "mark DISCONT, we did a seek to another position");
4420 parse->priv->offset = seekpos;
4421 parse->priv->last_offset = seekpos;
4422 parse->priv->seen_keyframe = FALSE;
4423 parse->priv->discont = TRUE;
4424 parse->priv->next_dts = start_ts;
4425 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4426 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4427 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4428 parse->priv->sync_offset = seekpos;
4429 parse->priv->exact_position = accurate;
4432 /* Start streaming thread if paused */
4433 gst_pad_start_task (parse->sinkpad,
4434 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4436 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4441 GstEvent *new_event;
4442 GstBaseParseSeek *seek;
4443 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4445 /* The only thing we need to do in PUSH-mode is to send the
4446 seek event (in bytes) to upstream. Segment / flush handling happens
4447 in corresponding src event handlers */
4448 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4449 if (seekstop >= 0 && seekstop <= seekpos)
4451 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4452 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4453 gst_event_set_seqnum (new_event, seqnum);
4455 /* store segment info so its precise details can be reconstructed when
4456 * receiving newsegment;
4457 * this matters for all details when accurate seeking,
4458 * is most useful to preserve NONE stop time otherwise */
4459 seek = g_new0 (GstBaseParseSeek, 1);
4460 seek->segment = seeksegment;
4461 seek->accurate = accurate;
4462 seek->offset = seekpos;
4463 seek->start_ts = start_ts;
4464 GST_OBJECT_LOCK (parse);
4465 /* less optimal, but preserves order */
4466 parse->priv->pending_seeks =
4467 g_slist_append (parse->priv->pending_seeks, seek);
4468 GST_OBJECT_UNLOCK (parse);
4470 res = gst_pad_push_event (parse->sinkpad, new_event);
4473 GST_OBJECT_LOCK (parse);
4474 parse->priv->pending_seeks =
4475 g_slist_remove (parse->priv->pending_seeks, seek);
4476 GST_OBJECT_UNLOCK (parse);
4482 gst_event_unref (event);
4486 negative_rate_pull_mode:
4488 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4494 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4500 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4506 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4507 "couldn't convert that into TIME format", gst_format_get_name (format));
4513 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4519 /* Checks if bitrates are available from upstream tags so that we don't
4520 * override them later
4523 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4525 GstTagList *taglist = NULL;
4528 gst_event_parse_tag (event, &taglist);
4530 /* We only care about stream tags here */
4531 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4534 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4535 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4536 parse->priv->post_min_bitrate = FALSE;
4538 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4539 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4540 parse->priv->post_avg_bitrate = FALSE;
4542 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4543 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4544 parse->priv->post_max_bitrate = FALSE;
4550 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4552 GstBaseParse *parse = GST_BASE_PARSE (element);
4554 GST_BASE_PARSE_INDEX_LOCK (parse);
4555 if (parse->priv->index)
4556 gst_object_unref (parse->priv->index);
4558 parse->priv->index = gst_object_ref (index);
4559 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4560 &parse->priv->index_id);
4561 parse->priv->own_index = FALSE;
4563 parse->priv->index = NULL;
4565 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4569 gst_base_parse_get_index (GstElement * element)
4571 GstBaseParse *parse = GST_BASE_PARSE (element);
4572 GstIndex *result = NULL;
4574 GST_BASE_PARSE_INDEX_LOCK (parse);
4575 if (parse->priv->index)
4576 result = gst_object_ref (parse->priv->index);
4577 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4583 static GstStateChangeReturn
4584 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4586 GstBaseParse *parse;
4587 GstStateChangeReturn result;
4589 parse = GST_BASE_PARSE (element);
4591 switch (transition) {
4592 case GST_STATE_CHANGE_READY_TO_PAUSED:
4593 /* If this is our own index destroy it as the
4594 * old entries might be wrong for the new stream */
4595 GST_BASE_PARSE_INDEX_LOCK (parse);
4596 if (parse->priv->own_index) {
4597 gst_object_unref (parse->priv->index);
4598 parse->priv->index = NULL;
4599 parse->priv->own_index = FALSE;
4602 /* If no index was created, generate one */
4603 if (G_UNLIKELY (!parse->priv->index)) {
4604 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4606 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4607 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4608 &parse->priv->index_id);
4609 parse->priv->own_index = TRUE;
4611 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4617 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4619 switch (transition) {
4620 case GST_STATE_CHANGE_PAUSED_TO_READY:
4621 gst_base_parse_reset (parse);
4631 * gst_base_parse_set_ts_at_offset:
4632 * @parse: a #GstBaseParse
4633 * @offset: offset into current buffer
4635 * This function should only be called from a @handle_frame implementation.
4637 * #GstBaseParse creates initial timestamps for frames by using the last
4638 * timestamp seen in the stream before the frame starts. In certain
4639 * cases, the correct timestamps will occur in the stream after the
4640 * start of the frame, but before the start of the actual picture data.
4641 * This function can be used to set the timestamps based on the offset
4642 * into the frame data that the picture starts.
4647 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4649 GstClockTime pts, dts;
4651 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4653 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4654 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4656 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4657 GST_DEBUG_OBJECT (parse,
4658 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4659 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4661 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4662 parse->priv->prev_pts = parse->priv->next_pts = pts;
4664 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4665 parse->priv->prev_dts = parse->priv->next_dts = dts;