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 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1244 parse->priv->pending_events =
1245 g_list_prepend (parse->priv->pending_events, event);
1246 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1251 GST_DEBUG_OBJECT (parse, "event handled");
1257 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1262 pad = GST_BASE_PARSE_SINK_PAD (parse);
1264 switch (GST_QUERY_TYPE (query)) {
1265 case GST_QUERY_CAPS:
1267 GstBaseParseClass *bclass;
1269 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1271 if (bclass->get_sink_caps) {
1272 GstCaps *caps, *filter;
1274 gst_query_parse_caps (query, &filter);
1275 caps = bclass->get_sink_caps (parse, filter);
1276 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1278 gst_query_set_caps_result (query, caps);
1279 gst_caps_unref (caps);
1283 GstCaps *caps, *template_caps, *filter;
1285 gst_query_parse_caps (query, &filter);
1286 template_caps = gst_pad_get_pad_template_caps (pad);
1287 if (filter != NULL) {
1289 gst_caps_intersect_full (filter, template_caps,
1290 GST_CAPS_INTERSECT_FIRST);
1291 gst_caps_unref (template_caps);
1293 caps = template_caps;
1295 gst_query_set_caps_result (query, caps);
1296 gst_caps_unref (caps);
1304 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1313 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1315 GstBaseParseClass *bclass;
1316 GstBaseParse *parse;
1319 parse = GST_BASE_PARSE (parent);
1320 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1322 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1324 if (bclass->sink_query)
1325 ret = bclass->sink_query (parse, query);
1329 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1330 GST_QUERY_TYPE_NAME (query), ret, query);
1336 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1338 GstBaseParseClass *bclass;
1339 GstBaseParse *parse;
1342 parse = GST_BASE_PARSE (parent);
1343 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1345 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1346 GST_QUERY_TYPE_NAME (query), query);
1348 if (bclass->src_query)
1349 ret = bclass->src_query (parse, query);
1353 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1354 GST_QUERY_TYPE_NAME (query), ret, query);
1359 /* gst_base_parse_src_event:
1360 * @pad: #GstPad that received the event.
1361 * @event: #GstEvent that was received.
1363 * Handler for source pad events.
1365 * Returns: %TRUE if the event was handled.
1368 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1370 GstBaseParse *parse;
1371 GstBaseParseClass *bclass;
1372 gboolean ret = TRUE;
1374 parse = GST_BASE_PARSE (parent);
1375 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1377 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1378 GST_EVENT_TYPE_NAME (event));
1380 if (bclass->src_event)
1381 ret = bclass->src_event (parse, event);
1383 gst_event_unref (event);
1389 gst_base_parse_is_seekable (GstBaseParse * parse)
1391 /* FIXME: could do more here, e.g. check index or just send data from 0
1392 * in pull mode and let decoder/sink clip */
1393 return parse->priv->syncable;
1396 /* gst_base_parse_src_event_default:
1397 * @parse: #GstBaseParse.
1398 * @event: #GstEvent that was received.
1400 * Default srcpad event handler.
1402 * Returns: %TRUE if the event was handled and can be dropped.
1405 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1407 gboolean res = FALSE;
1409 switch (GST_EVENT_TYPE (event)) {
1410 case GST_EVENT_SEEK:
1411 if (gst_base_parse_is_seekable (parse))
1412 res = gst_base_parse_handle_seek (parse, event);
1415 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1424 * gst_base_parse_convert_default:
1425 * @parse: #GstBaseParse.
1426 * @src_format: #GstFormat describing the source format.
1427 * @src_value: Source value to be converted.
1428 * @dest_format: #GstFormat defining the converted format.
1429 * @dest_value: Pointer where the conversion result will be put.
1431 * Default implementation of "convert" vmethod in #GstBaseParse class.
1433 * Returns: %TRUE if conversion was successful.
1436 gst_base_parse_convert_default (GstBaseParse * parse,
1437 GstFormat src_format,
1438 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1440 gboolean ret = FALSE;
1441 guint64 bytes, duration;
1443 if (G_UNLIKELY (src_format == dest_format)) {
1444 *dest_value = src_value;
1448 if (G_UNLIKELY (src_value == -1)) {
1453 if (G_UNLIKELY (src_value == 0)) {
1458 /* need at least some frames */
1459 if (!parse->priv->framecount)
1462 duration = parse->priv->acc_duration / GST_MSECOND;
1463 bytes = parse->priv->bytecount;
1465 if (G_UNLIKELY (!duration || !bytes))
1466 goto no_duration_bytes;
1468 if (src_format == GST_FORMAT_BYTES) {
1469 if (dest_format == GST_FORMAT_TIME) {
1470 /* BYTES -> TIME conversion */
1471 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1472 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1473 *dest_value *= GST_MSECOND;
1474 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1475 *dest_value / GST_MSECOND);
1478 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1480 } else if (src_format == GST_FORMAT_TIME) {
1481 if (dest_format == GST_FORMAT_BYTES) {
1482 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1483 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1485 GST_DEBUG_OBJECT (parse,
1486 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1487 src_value / GST_MSECOND, *dest_value);
1490 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1492 } else if (src_format == GST_FORMAT_DEFAULT) {
1493 /* DEFAULT == frame-based */
1494 if (dest_format == GST_FORMAT_TIME) {
1495 GST_DEBUG_OBJECT (parse, "converting default -> time");
1496 if (parse->priv->fps_den) {
1497 *dest_value = gst_util_uint64_scale (src_value,
1498 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1502 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1505 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1512 GST_DEBUG_OBJECT (parse, "no framecount");
1517 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1518 G_GUINT64_FORMAT, duration, bytes);
1525 gst_base_parse_update_duration (GstBaseParse * baseparse)
1528 GstBaseParse *parse;
1530 parse = GST_BASE_PARSE (baseparse);
1532 peer = gst_pad_get_peer (parse->sinkpad);
1534 gboolean qres = FALSE;
1535 gint64 ptot, dest_value;
1537 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1538 gst_object_unref (GST_OBJECT (peer));
1540 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1541 GST_FORMAT_TIME, &dest_value)) {
1543 /* inform if duration changed, but try to avoid spamming */
1544 parse->priv->estimated_drift +=
1545 dest_value - parse->priv->estimated_duration;
1547 parse->priv->estimated_duration = dest_value;
1548 GST_LOG_OBJECT (parse,
1549 "updated estimated duration to %" GST_TIME_FORMAT,
1550 GST_TIME_ARGS (dest_value));
1552 if (parse->priv->estimated_drift > GST_SECOND ||
1553 parse->priv->estimated_drift < -GST_SECOND) {
1554 gst_element_post_message (GST_ELEMENT (parse),
1555 gst_message_new_duration_changed (GST_OBJECT (parse)));
1556 parse->priv->estimated_drift = 0;
1564 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1565 gboolean post_avg, gboolean post_max)
1567 GstTagList *taglist = NULL;
1569 if (post_min && parse->priv->post_min_bitrate) {
1570 taglist = gst_tag_list_new_empty ();
1572 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1573 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1576 if (post_avg && parse->priv->post_avg_bitrate) {
1577 if (taglist == NULL)
1578 taglist = gst_tag_list_new_empty ();
1580 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1581 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1582 parse->priv->avg_bitrate, NULL);
1585 if (post_max && parse->priv->post_max_bitrate) {
1586 if (taglist == NULL)
1587 taglist = gst_tag_list_new_empty ();
1589 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1590 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1593 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1594 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1595 parse->priv->max_bitrate);
1597 if (taglist != NULL) {
1598 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1602 /* gst_base_parse_update_bitrates:
1603 * @parse: #GstBaseParse.
1604 * @buffer: Current frame as a #GstBuffer
1606 * Keeps track of the minimum and maximum bitrates, and also maintains a
1607 * running average bitrate of the stream so far.
1610 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1612 /* Only update the tag on a 10 kbps delta */
1613 static const gint update_threshold = 10000;
1615 guint64 data_len, frame_dur;
1616 gint overhead, frame_bitrate, old_avg_bitrate;
1617 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1618 GstBuffer *buffer = frame->buffer;
1620 overhead = frame->overhead;
1624 data_len = gst_buffer_get_size (buffer) - overhead;
1625 parse->priv->data_bytecount += data_len;
1627 /* duration should be valid by now,
1628 * either set by subclass or maybe based on fps settings */
1629 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1630 /* Calculate duration of a frame from buffer properties */
1631 frame_dur = GST_BUFFER_DURATION (buffer);
1632 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1633 parse->priv->acc_duration;
1636 /* No way to figure out frame duration (is this even possible?) */
1640 /* override if subclass provided bitrate, e.g. metadata based */
1641 if (parse->priv->bitrate) {
1642 parse->priv->avg_bitrate = parse->priv->bitrate;
1643 /* spread this (confirmed) info ASAP */
1644 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1645 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1649 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1653 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1654 parse->priv->avg_bitrate);
1656 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1658 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1659 /* always post all at threshold time */
1660 update_min = update_max = update_avg = TRUE;
1663 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1664 if (frame_bitrate < parse->priv->min_bitrate) {
1665 parse->priv->min_bitrate = frame_bitrate;
1669 if (frame_bitrate > parse->priv->max_bitrate) {
1670 parse->priv->max_bitrate = frame_bitrate;
1674 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1675 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1676 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1681 if ((update_min || update_avg || update_max))
1682 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1689 * gst_base_parse_add_index_entry:
1690 * @parse: #GstBaseParse.
1691 * @offset: offset of entry
1692 * @ts: timestamp associated with offset
1693 * @key: whether entry refers to keyframe
1694 * @force: add entry disregarding sanity checks
1696 * Adds an entry to the index associating @offset to @ts. It is recommended
1697 * to only add keyframe entries. @force allows to bypass checks, such as
1698 * whether the stream is (upstream) seekable, another entry is already "close"
1699 * to the new entry, etc.
1701 * Returns: #gboolean indicating whether entry was added
1704 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1705 GstClockTime ts, gboolean key, gboolean force)
1707 gboolean ret = FALSE;
1708 GstIndexAssociation associations[2];
1710 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1711 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1713 if (G_LIKELY (!force)) {
1715 if (!parse->priv->upstream_seekable) {
1716 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1720 /* FIXME need better helper data structure that handles these issues
1721 * related to ongoing collecting of index entries */
1722 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1724 GST_LOG_OBJECT (parse,
1725 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1726 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1730 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1731 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1732 parse->priv->idx_interval) {
1733 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1734 GST_TIME_ARGS (parse->priv->index_last_ts));
1738 /* if last is not really the last one */
1739 if (!parse->priv->index_last_valid) {
1740 GstClockTime prev_ts;
1742 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1743 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1744 GST_LOG_OBJECT (parse,
1745 "entry too close to existing entry %" GST_TIME_FORMAT,
1746 GST_TIME_ARGS (prev_ts));
1747 parse->priv->index_last_offset = offset;
1748 parse->priv->index_last_ts = ts;
1754 associations[0].format = GST_FORMAT_TIME;
1755 associations[0].value = ts;
1756 associations[1].format = GST_FORMAT_BYTES;
1757 associations[1].value = offset;
1759 /* index might change on-the-fly, although that would be nutty app ... */
1760 GST_BASE_PARSE_INDEX_LOCK (parse);
1761 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1762 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1763 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1764 (const GstIndexAssociation *) &associations);
1765 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1768 parse->priv->index_last_offset = offset;
1769 parse->priv->index_last_ts = ts;
1778 /* check for seekable upstream, above and beyond a mere query */
1780 gst_base_parse_check_seekability (GstBaseParse * parse)
1783 gboolean seekable = FALSE;
1784 gint64 start = -1, stop = -1;
1785 guint idx_interval = 0;
1786 guint64 idx_byte_interval = 0;
1788 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1789 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1790 GST_DEBUG_OBJECT (parse, "seeking query failed");
1794 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1796 /* try harder to query upstream size if we didn't get it the first time */
1797 if (seekable && stop == -1) {
1798 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1799 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1802 /* if upstream doesn't know the size, it's likely that it's not seekable in
1803 * practice even if it technically may be seekable */
1804 if (seekable && (start != 0 || stop <= start)) {
1805 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1809 /* let's not put every single frame into our index */
1811 if (stop < 10 * 1024 * 1024)
1813 else if (stop < 100 * 1024 * 1024)
1816 idx_interval = 1000;
1818 /* ensure that even for large files (e.g. very long audio files), the index
1819 * stays reasonably-size, with some arbitrary limit to the total number of
1821 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1822 GST_DEBUG_OBJECT (parse,
1823 "Limiting index entries to %d, indexing byte interval %"
1824 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1828 gst_query_unref (query);
1830 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1831 G_GUINT64_FORMAT ")", seekable, start, stop);
1832 parse->priv->upstream_seekable = seekable;
1833 parse->priv->upstream_size = seekable ? stop : 0;
1835 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1836 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1837 parse->priv->idx_byte_interval = idx_byte_interval;
1840 /* some misc checks on upstream */
1842 gst_base_parse_check_upstream (GstBaseParse * parse)
1846 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1847 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1848 /* upstream has one, accept it also, and no further updates */
1849 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1850 parse->priv->upstream_has_duration = TRUE;
1853 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1854 parse->priv->upstream_has_duration);
1857 /* checks src caps to determine if dealing with audio or video */
1858 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1860 gst_base_parse_check_media (GstBaseParse * parse)
1865 caps = gst_pad_get_current_caps (parse->srcpad);
1866 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1867 parse->priv->is_video =
1868 g_str_has_prefix (gst_structure_get_name (s), "video");
1870 /* historical default */
1871 parse->priv->is_video = FALSE;
1874 gst_caps_unref (caps);
1876 parse->priv->checked_media = TRUE;
1877 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1880 /* takes ownership of frame */
1882 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1884 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1885 /* frame allocated on the heap, we can just take ownership */
1886 g_queue_push_tail (&parse->priv->queued_frames, frame);
1887 GST_TRACE ("queued frame %p", frame);
1889 GstBaseParseFrame *copy;
1891 /* probably allocated on the stack, must make a proper copy */
1892 copy = gst_base_parse_frame_copy (frame);
1893 g_queue_push_tail (&parse->priv->queued_frames, copy);
1894 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1895 gst_base_parse_frame_free (frame);
1899 /* makes sure that @buf is properly prepared and decorated for passing
1900 * to baseclass, and an equally setup frame is returned setup with @buf.
1901 * Takes ownership of @buf. */
1902 static GstBaseParseFrame *
1903 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1905 GstBaseParseFrame *frame = NULL;
1907 buffer = gst_buffer_make_writable (buffer);
1909 GST_LOG_OBJECT (parse,
1910 "preparing frame at offset %" G_GUINT64_FORMAT
1911 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1912 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1913 gst_buffer_get_size (buffer));
1915 if (parse->priv->discont) {
1916 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1917 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1918 parse->priv->discont = FALSE;
1921 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1923 frame = gst_base_parse_frame_new (buffer, 0, 0);
1925 /* also ensure to update state flags */
1926 gst_base_parse_frame_update (parse, frame, buffer);
1927 gst_buffer_unref (buffer);
1929 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1930 GST_LOG_OBJECT (parse, "marking as new frame");
1931 parse->priv->new_frame = FALSE;
1932 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1935 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1937 /* use default handler to provide initial (upstream) metadata */
1938 gst_base_parse_parse_frame (parse, frame);
1943 /* Wraps buffer in a frame and dispatches to subclass.
1944 * Also manages data skipping and offset handling (including adapter flushing).
1945 * Takes ownership of @buffer */
1946 static GstFlowReturn
1947 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1948 gint * skip, gint * flushed)
1950 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1951 GstBaseParseFrame *frame;
1954 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1956 GST_LOG_OBJECT (parse,
1957 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1958 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1959 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1960 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1961 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1963 /* track what is being flushed during this single round of frame processing */
1964 parse->priv->flushed = 0;
1967 /* make it easy for _finish_frame to pick up input data */
1968 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1969 gst_buffer_ref (buffer);
1970 gst_adapter_push (parse->priv->adapter, buffer);
1973 frame = gst_base_parse_prepare_frame (parse, buffer);
1974 ret = klass->handle_frame (parse, frame, skip);
1976 *flushed = parse->priv->flushed;
1978 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1981 /* subclass can only do one of these, or semantics are too unclear */
1982 g_assert (*skip == 0 || *flushed == 0);
1984 /* track skipping */
1986 GstClockTime pts, dts;
1989 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1990 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1991 /* reverse playback, and no frames found yet, so we are skipping
1992 * the leading part of a fragment, which may form the tail of
1993 * fragment coming later, hopefully subclass skips efficiently ... */
1994 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1995 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1996 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1997 outbuf = gst_buffer_make_writable (outbuf);
1998 GST_BUFFER_PTS (outbuf) = pts;
1999 GST_BUFFER_DTS (outbuf) = dts;
2000 parse->priv->buffers_head =
2001 g_slist_prepend (parse->priv->buffers_head, outbuf);
2004 /* If we're asked to skip more than is available in the adapter,
2005 we need to remember what we need to skip for next iteration */
2006 gsize av = gst_adapter_available (parse->priv->adapter);
2007 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2009 gst_adapter_flush (parse->priv->adapter, *skip);
2012 ("This is more than available, flushing %" G_GSIZE_FORMAT
2013 ", storing %u to skip", av, (guint) (*skip - av));
2014 parse->priv->skip = *skip - av;
2015 gst_adapter_flush (parse->priv->adapter, av);
2019 if (!parse->priv->discont)
2020 parse->priv->sync_offset = parse->priv->offset;
2021 parse->priv->offset += *skip;
2022 parse->priv->discont = TRUE;
2023 /* check for indefinite skipping */
2024 if (ret == GST_FLOW_OK)
2025 ret = gst_base_parse_check_sync (parse);
2028 parse->priv->offset += *flushed;
2030 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2031 gst_adapter_clear (parse->priv->adapter);
2034 gst_base_parse_frame_free (frame);
2039 /* gst_base_parse_push_pending_events:
2040 * @parse: #GstBaseParse
2042 * Pushes the pending events
2045 gst_base_parse_push_pending_events (GstBaseParse * parse)
2047 if (G_UNLIKELY (parse->priv->pending_events)) {
2048 GList *r = g_list_reverse (parse->priv->pending_events);
2051 parse->priv->pending_events = NULL;
2052 for (l = r; l != NULL; l = l->next) {
2053 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2059 /* gst_base_parse_handle_and_push_frame:
2060 * @parse: #GstBaseParse.
2061 * @klass: #GstBaseParseClass.
2062 * @frame: (transfer full): a #GstBaseParseFrame
2064 * Parses the frame from given buffer and pushes it forward. Also performs
2065 * timestamp handling and checks the segment limits.
2067 * This is called with srcpad STREAM_LOCK held.
2069 * Returns: #GstFlowReturn
2071 static GstFlowReturn
2072 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2073 GstBaseParseFrame * frame)
2078 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2080 buffer = frame->buffer;
2081 offset = frame->offset;
2083 /* check if subclass/format can provide ts.
2084 * If so, that allows and enables extra seek and duration determining options */
2085 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2086 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2087 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2088 parse->priv->first_frame_offset = offset;
2089 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2090 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2091 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2092 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2093 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2094 GST_TIME_ARGS (parse->priv->first_frame_pts),
2095 parse->priv->first_frame_offset);
2096 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2098 GstClockTime last_ts = G_MAXINT64;
2100 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2101 gst_base_parse_locate_time (parse, &last_ts, &off);
2102 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2103 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2106 /* disable further checks */
2107 parse->priv->first_frame_offset = 0;
2111 /* track upstream time if provided, not subclass' internal notion of it */
2112 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2113 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2114 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2117 /* interpolating and no valid pts yet,
2118 * start with dts and carry on from there */
2119 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2120 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2121 parse->priv->next_pts = parse->priv->next_dts;
2123 /* again use default handler to add missing metadata;
2124 * we may have new information on frame properties */
2125 gst_base_parse_parse_frame (parse, frame);
2127 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2128 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2129 parse->priv->next_dts =
2130 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2131 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2132 GstClockTime next_pts =
2133 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2134 if (next_pts >= parse->priv->next_dts)
2135 parse->priv->next_pts = next_pts;
2138 /* we lost track, do not produce bogus time next time around
2139 * (probably means parser subclass has given up on parsing as well) */
2140 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2141 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2144 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2145 GST_BUFFER_PTS_IS_VALID (buffer))
2146 gst_base_parse_add_index_entry (parse, offset,
2147 GST_BUFFER_PTS (buffer),
2148 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2150 /* All OK, push queued frames if there are any */
2151 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2152 GstBaseParseFrame *queued_frame;
2154 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2155 gst_base_parse_push_frame (parse, queued_frame);
2156 gst_base_parse_frame_free (queued_frame);
2160 return gst_base_parse_push_frame (parse, frame);
2164 * gst_base_parse_push_frame:
2165 * @parse: #GstBaseParse.
2166 * @frame: (transfer none): a #GstBaseParseFrame
2168 * Pushes the frame's buffer downstream, sends any pending events and
2169 * does some timestamp and segment handling. Takes ownership of
2170 * frame's buffer, though caller retains ownership of @frame.
2172 * This must be called with sinkpad STREAM_LOCK held.
2174 * Returns: #GstFlowReturn
2177 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2179 GstFlowReturn ret = GST_FLOW_OK;
2180 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2181 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2182 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2186 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2187 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2189 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2191 buffer = frame->buffer;
2193 GST_LOG_OBJECT (parse,
2194 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2195 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2196 gst_buffer_get_size (buffer),
2197 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2198 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2199 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2202 parse->priv->bytecount += frame->size;
2203 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2204 parse->priv->framecount++;
2205 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2206 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2209 /* 0 means disabled */
2210 if (parse->priv->update_interval < 0)
2211 parse->priv->update_interval = 50;
2212 else if (parse->priv->update_interval > 0 &&
2213 (parse->priv->framecount % parse->priv->update_interval) == 0)
2214 gst_base_parse_update_duration (parse);
2216 if (GST_BUFFER_PTS_IS_VALID (buffer))
2217 last_start = last_stop = GST_BUFFER_PTS (buffer);
2218 if (last_start != GST_CLOCK_TIME_NONE
2219 && GST_BUFFER_DURATION_IS_VALID (buffer))
2220 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2222 /* should have caps by now */
2223 if (!gst_pad_has_current_caps (parse->srcpad))
2226 if (G_UNLIKELY (!parse->priv->checked_media)) {
2227 /* have caps; check identity */
2228 gst_base_parse_check_media (parse);
2231 /* Push pending events, including SEGMENT events */
2232 gst_base_parse_push_pending_events (parse);
2234 /* segment adjustment magic; only if we are running the whole show */
2235 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2236 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2237 parse->priv->upstream_seekable)) {
2239 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2240 GST_CLOCK_TIME_IS_VALID (last_start)) {
2241 GstClockTimeDiff diff;
2243 /* only send newsegments with increasing start times,
2244 * otherwise if these go back and forth downstream (sinks) increase
2245 * accumulated time and running_time */
2246 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2247 if (G_UNLIKELY (diff > 2 * GST_SECOND
2248 && last_start > parse->segment.start
2249 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2250 || last_start < parse->segment.stop))) {
2252 GST_DEBUG_OBJECT (parse,
2253 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2254 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2255 "Sending updated SEGMENT events", diff,
2256 GST_TIME_ARGS (parse->segment.position),
2257 GST_TIME_ARGS (last_start));
2259 /* skip gap FIXME */
2260 gst_pad_push_event (parse->srcpad,
2261 gst_event_new_segment (&parse->segment));
2263 parse->segment.position = last_start;
2268 /* update bitrates and optionally post corresponding tags
2269 * (following newsegment) */
2270 gst_base_parse_update_bitrates (parse, frame);
2272 if (klass->pre_push_frame) {
2273 ret = klass->pre_push_frame (parse, frame);
2275 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2278 /* take final ownership of frame buffer */
2279 if (frame->out_buffer) {
2280 buffer = frame->out_buffer;
2281 frame->out_buffer = NULL;
2282 gst_buffer_replace (&frame->buffer, NULL);
2284 buffer = frame->buffer;
2285 frame->buffer = NULL;
2288 /* subclass must play nice */
2289 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2291 size = gst_buffer_get_size (buffer);
2293 parse->priv->seen_keyframe |= parse->priv->is_video &&
2294 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2296 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2297 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2298 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2299 GST_BUFFER_TIMESTAMP (buffer) >
2300 parse->segment.stop + parse->priv->lead_out_ts) {
2301 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2303 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2304 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2305 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2306 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2307 parse->priv->lead_in_ts < parse->segment.start) {
2308 if (parse->priv->seen_keyframe) {
2309 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2312 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2313 ret = GST_BASE_PARSE_FLOW_DROPPED;
2320 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2321 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2322 gst_buffer_unref (buffer);
2324 } else if (ret == GST_FLOW_OK) {
2325 if (parse->segment.rate > 0.0) {
2326 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2328 ret = gst_pad_push (parse->srcpad, buffer);
2329 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2330 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2332 /* in backwards playback mode, if on passthrough we need to push buffers
2333 * directly without accumulating them into the buffers_queued as baseparse
2334 * will never check for a DISCONT while on passthrough and those buffers
2335 * will never be pushed.
2337 * also, as we are on reverse playback, it might be possible that
2338 * passthrough might have just been enabled, so make sure to drain the
2339 * buffers_queued list */
2340 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2341 gst_base_parse_finish_fragment (parse, TRUE);
2342 ret = gst_base_parse_send_buffers (parse);
2345 if (ret == GST_FLOW_OK) {
2346 GST_LOG_OBJECT (parse,
2347 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2348 ret = gst_pad_push (parse->srcpad, buffer);
2349 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2350 gst_flow_get_name (ret));
2352 GST_LOG_OBJECT (parse,
2353 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2354 gst_flow_get_name (ret));
2355 gst_buffer_unref (buffer);
2359 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2361 parse->priv->buffers_queued =
2362 g_slist_prepend (parse->priv->buffers_queued, buffer);
2366 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2367 size, gst_flow_get_name (ret));
2368 gst_buffer_unref (buffer);
2369 /* if we are not sufficiently in control, let upstream decide on EOS */
2370 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2371 (parse->priv->passthrough ||
2372 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2373 !parse->priv->upstream_seekable)))
2377 /* Update current running segment position */
2378 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2379 parse->segment.position < last_stop)
2380 parse->segment.position = last_stop;
2387 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2388 return GST_FLOW_FLUSHING;
2390 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2391 return GST_FLOW_ERROR;
2396 * gst_base_parse_finish_frame:
2397 * @parse: a #GstBaseParse
2398 * @frame: a #GstBaseParseFrame
2399 * @size: consumed input data represented by frame
2401 * Collects parsed data and pushes this downstream.
2402 * Source pad caps must be set when this is called.
2404 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2405 * Otherwise, @size samples will be taken from the input and used for output,
2406 * and the output's metadata (timestamps etc) will be taken as (optionally)
2407 * set by the subclass on @frame's (input) buffer (which is otherwise
2408 * ignored for any but the above purpose/information).
2410 * Note that the latter buffer is invalidated by this call, whereas the
2411 * caller retains ownership of @frame.
2413 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2416 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2419 GstFlowReturn ret = GST_FLOW_OK;
2421 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2422 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2423 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2424 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2427 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2428 "flushing size %d", frame->offset, size);
2430 /* some one-time start-up */
2431 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2432 gst_base_parse_check_seekability (parse);
2433 gst_base_parse_check_upstream (parse);
2436 parse->priv->flushed += size;
2438 if (parse->priv->scanning && frame->buffer) {
2439 if (!parse->priv->scanned_frame) {
2440 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2445 /* either PUSH or PULL mode arranges for adapter data */
2446 /* ensure output buffer */
2447 if (!frame->out_buffer) {
2448 GstBuffer *src, *dest;
2450 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2451 dest = frame->out_buffer;
2452 src = frame->buffer;
2453 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2454 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2455 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2456 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2457 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2458 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2460 gst_adapter_flush (parse->priv->adapter, size);
2463 /* use as input for subsequent processing */
2464 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2465 gst_buffer_unref (frame->out_buffer);
2466 frame->out_buffer = NULL;
2468 /* mark input size consumed */
2471 /* subclass might queue frames/data internally if it needs more
2472 * frames to decide on the format, or might request us to queue here. */
2473 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2474 gst_buffer_replace (&frame->buffer, NULL);
2476 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2477 GstBaseParseFrame *copy;
2479 copy = gst_base_parse_frame_copy (frame);
2480 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2481 gst_base_parse_queue_frame (parse, copy);
2485 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2491 /* gst_base_parse_drain:
2493 * Drains the adapter until it is empty. It decreases the min_frame_size to
2494 * match the current adapter size and calls chain method until the adapter
2495 * is emptied or chain returns with error.
2498 gst_base_parse_drain (GstBaseParse * parse)
2502 GST_DEBUG_OBJECT (parse, "draining");
2503 parse->priv->drain = TRUE;
2506 avail = gst_adapter_available (parse->priv->adapter);
2510 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2511 NULL) != GST_FLOW_OK) {
2515 /* nothing changed, maybe due to truncated frame; break infinite loop */
2516 if (avail == gst_adapter_available (parse->priv->adapter)) {
2517 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2518 gst_adapter_clear (parse->priv->adapter);
2522 parse->priv->drain = FALSE;
2525 /* gst_base_parse_send_buffers
2527 * Sends buffers collected in send_buffers downstream, and ensures that list
2528 * is empty at the end (errors or not).
2530 static GstFlowReturn
2531 gst_base_parse_send_buffers (GstBaseParse * parse)
2533 GSList *send = NULL;
2535 GstFlowReturn ret = GST_FLOW_OK;
2536 gboolean first = TRUE;
2538 send = parse->priv->buffers_send;
2542 buf = GST_BUFFER_CAST (send->data);
2543 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2544 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2545 ", offset %" G_GINT64_FORMAT, buf,
2546 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2547 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2548 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2550 /* Make sure the first buffer is always DISCONT. If we split
2551 * GOPs inside the parser this is otherwise not guaranteed */
2553 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2557 /* iterate output queue an push downstream */
2558 ret = gst_pad_push (parse->srcpad, buf);
2559 send = g_slist_delete_link (send, send);
2561 /* clear any leftover if error */
2562 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2564 buf = GST_BUFFER_CAST (send->data);
2565 gst_buffer_unref (buf);
2566 send = g_slist_delete_link (send, send);
2571 parse->priv->buffers_send = send;
2576 /* gst_base_parse_start_fragment:
2578 * Prepares for processing a reverse playback (forward) fragment
2579 * by (re)setting proper state variables.
2581 static GstFlowReturn
2582 gst_base_parse_start_fragment (GstBaseParse * parse)
2584 GST_LOG_OBJECT (parse, "starting fragment");
2586 /* invalidate so no fall-back timestamping is performed;
2587 * ok if taken from subclass or upstream */
2588 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2589 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2590 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2591 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2592 /* prevent it hanging around stop all the time */
2593 parse->segment.position = GST_CLOCK_TIME_NONE;
2595 parse->priv->discont = TRUE;
2597 /* head of previous fragment is now pending tail of current fragment */
2598 parse->priv->buffers_pending = parse->priv->buffers_head;
2599 parse->priv->buffers_head = NULL;
2605 /* gst_base_parse_finish_fragment:
2607 * Processes a reverse playback (forward) fragment:
2608 * - append head of last fragment that was skipped to current fragment data
2609 * - drain the resulting current fragment data (i.e. repeated chain)
2610 * - add time/duration (if needed) to frames queued by chain
2611 * - push queued data
2613 static GstFlowReturn
2614 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2617 GstFlowReturn ret = GST_FLOW_OK;
2618 gboolean seen_key = FALSE, seen_delta = FALSE;
2620 GST_LOG_OBJECT (parse, "finishing fragment");
2623 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2624 while (parse->priv->buffers_pending) {
2625 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2627 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2628 gst_buffer_get_size (buf));
2629 gst_adapter_push (parse->priv->adapter, buf);
2631 GST_LOG_OBJECT (parse, "discarding head buffer");
2632 gst_buffer_unref (buf);
2634 parse->priv->buffers_pending =
2635 g_slist_delete_link (parse->priv->buffers_pending,
2636 parse->priv->buffers_pending);
2639 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2640 /* initial skipped data is added to buffers_pending */
2641 gst_base_parse_drain (parse);
2643 if (parse->priv->buffers_send) {
2644 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2645 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2648 /* add metadata (if needed to queued buffers */
2649 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2650 GST_TIME_ARGS (parse->priv->last_pts));
2651 while (parse->priv->buffers_queued) {
2652 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2654 /* no touching if upstream or parsing provided time */
2655 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2656 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2657 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2658 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2659 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2660 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2661 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2663 parse->priv->last_pts = 0;
2664 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2665 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2666 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2668 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2669 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2670 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2672 parse->priv->last_dts = 0;
2673 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2674 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2675 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2678 /* no idea, very bad */
2679 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2682 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2683 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2685 /* reverse order for ascending sending */
2686 /* send downstream at keyframe not preceded by a keyframe
2687 * (e.g. that should identify start of collection of IDR nals) */
2688 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2690 ret = gst_base_parse_send_buffers (parse);
2691 /* if a problem, throw all to sending */
2692 if (ret != GST_FLOW_OK) {
2693 parse->priv->buffers_send =
2694 g_slist_reverse (parse->priv->buffers_queued);
2695 parse->priv->buffers_queued = NULL;
2705 parse->priv->buffers_send =
2706 g_slist_prepend (parse->priv->buffers_send, buf);
2707 parse->priv->buffers_queued =
2708 g_slist_delete_link (parse->priv->buffers_queued,
2709 parse->priv->buffers_queued);
2712 /* audio may have all marked as keyframe, so arrange to send here. Also
2713 * we might have ended the loop above on a keyframe, in which case we
2715 if (!seen_delta || seen_key)
2716 ret = gst_base_parse_send_buffers (parse);
2718 /* any trailing unused no longer usable (ideally none) */
2719 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2720 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2721 gst_adapter_available (parse->priv->adapter));
2722 gst_adapter_clear (parse->priv->adapter);
2728 /* small helper that checks whether we have been trying to resync too long */
2729 static inline GstFlowReturn
2730 gst_base_parse_check_sync (GstBaseParse * parse)
2732 if (G_UNLIKELY (parse->priv->discont &&
2733 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2734 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2735 ("Failed to parse stream"), (NULL));
2736 return GST_FLOW_ERROR;
2742 static GstFlowReturn
2743 gst_base_parse_process_streamheader (GstBaseParse * parse)
2747 const GValue *value;
2748 GstFlowReturn ret = GST_FLOW_OK;
2750 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2754 str = gst_caps_get_structure (caps, 0);
2755 value = gst_structure_get_value (str, "streamheader");
2759 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2761 if (GST_VALUE_HOLDS_ARRAY (value)) {
2763 gsize len = gst_value_array_get_size (value);
2765 for (i = 0; i < len; i++) {
2767 gst_value_get_buffer (gst_value_array_get_value (value, i));
2769 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2770 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2773 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2774 GstBuffer *buffer = gst_value_get_buffer (value);
2776 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2777 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2780 gst_caps_unref (caps);
2787 gst_caps_unref (caps);
2790 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2795 static GstFlowReturn
2796 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2798 GstBaseParseClass *bclass;
2799 GstBaseParse *parse;
2800 GstFlowReturn ret = GST_FLOW_OK;
2801 GstFlowReturn old_ret = GST_FLOW_OK;
2802 GstBuffer *tmpbuf = NULL;
2807 GstClockTime pts, dts;
2809 parse = GST_BASE_PARSE (parent);
2810 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2811 GST_DEBUG_OBJECT (parent, "chain");
2813 /* early out for speed, if we need to skip */
2814 if (parse->priv->skip > 0) {
2815 gsize bsize = gst_buffer_get_size (buffer);
2816 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2818 if (parse->priv->skip >= bsize) {
2819 parse->priv->skip -= bsize;
2820 GST_DEBUG ("All the buffer is skipped");
2821 parse->priv->offset += bsize;
2822 parse->priv->sync_offset = parse->priv->offset;
2825 buffer = gst_buffer_make_writable (buffer);
2826 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2827 parse->priv->offset += parse->priv->skip;
2828 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2829 (unsigned) (bsize - parse->priv->skip));
2830 parse->priv->skip = 0;
2831 parse->priv->discont = TRUE;
2834 if (G_UNLIKELY (parse->priv->first_buffer)) {
2835 parse->priv->first_buffer = FALSE;
2836 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2837 /* this stream has no header buffers, check if we just prepend the
2838 * streamheader from caps to the stream */
2839 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2840 "prepend to the stream");
2841 gst_base_parse_process_streamheader (parse);
2843 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2844 "streamheader from caps");
2848 if (parse->priv->detecting) {
2849 GstBuffer *detect_buf;
2851 if (parse->priv->detect_buffers_size == 0) {
2852 detect_buf = gst_buffer_ref (buffer);
2857 detect_buf = gst_buffer_new ();
2859 for (l = parse->priv->detect_buffers; l; l = l->next) {
2860 gsize tmpsize = gst_buffer_get_size (l->data);
2862 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2863 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2867 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2868 offset, gst_buffer_get_size (buffer));
2871 ret = bclass->detect (parse, detect_buf);
2872 gst_buffer_unref (detect_buf);
2874 if (ret == GST_FLOW_OK) {
2877 /* Detected something */
2878 parse->priv->detecting = FALSE;
2880 for (l = parse->priv->detect_buffers; l; l = l->next) {
2881 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2883 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2884 parent, GST_BUFFER_CAST (l->data));
2886 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2888 g_list_free (parse->priv->detect_buffers);
2889 parse->priv->detect_buffers = NULL;
2890 parse->priv->detect_buffers_size = 0;
2892 if (ret != GST_FLOW_OK) {
2896 /* Handle the current buffer */
2897 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2898 /* Still detecting, append buffer or error out if draining */
2900 if (parse->priv->drain) {
2901 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2902 return GST_FLOW_ERROR;
2903 } else if (parse->priv->flushing) {
2904 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2906 g_list_free (parse->priv->detect_buffers);
2907 parse->priv->detect_buffers = NULL;
2908 parse->priv->detect_buffers_size = 0;
2910 parse->priv->detect_buffers =
2911 g_list_append (parse->priv->detect_buffers, buffer);
2912 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2916 /* Something went wrong, subclass responsible for error reporting */
2920 /* And now handle the current buffer if detection worked */
2923 if (G_LIKELY (buffer)) {
2924 GST_LOG_OBJECT (parse,
2925 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2926 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2927 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2928 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2929 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2931 if (G_UNLIKELY (!parse->priv->disable_passthrough
2932 && parse->priv->passthrough)) {
2933 GstBaseParseFrame frame;
2935 gst_base_parse_frame_init (&frame);
2936 frame.buffer = gst_buffer_make_writable (buffer);
2937 ret = gst_base_parse_push_frame (parse, &frame);
2938 gst_base_parse_frame_free (&frame);
2941 /* upstream feeding us in reverse playback;
2942 * finish previous fragment and start new upon DISCONT */
2943 if (parse->segment.rate < 0.0) {
2944 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2945 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2946 ret = gst_base_parse_finish_fragment (parse, TRUE);
2947 gst_base_parse_start_fragment (parse);
2950 gst_adapter_push (parse->priv->adapter, buffer);
2953 /* Parse and push as many frames as possible */
2954 /* Stop either when adapter is empty or we are flushing */
2955 while (!parse->priv->flushing) {
2958 /* note: if subclass indicates MAX fsize,
2959 * this will not likely be available anyway ... */
2960 min_size = MAX (parse->priv->min_frame_size, fsize);
2961 av = gst_adapter_available (parse->priv->adapter);
2963 if (G_UNLIKELY (parse->priv->drain)) {
2965 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2966 if (G_UNLIKELY (!min_size)) {
2971 /* Collect at least min_frame_size bytes */
2972 if (av < min_size) {
2973 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2977 /* move along with upstream timestamp (if any),
2978 * but interpolate in between */
2979 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2980 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2981 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2982 parse->priv->prev_pts = parse->priv->next_pts = pts;
2984 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2985 parse->priv->prev_dts = parse->priv->next_dts = dts;
2987 /* we can mess with, erm interpolate, timestamps,
2988 * and incoming stuff has PTS but no DTS seen so far,
2989 * then pick up DTS from PTS and hope for the best ... */
2990 if (parse->priv->infer_ts &&
2991 parse->priv->pts_interpolate &&
2992 !GST_CLOCK_TIME_IS_VALID (dts) &&
2993 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
2994 GST_CLOCK_TIME_IS_VALID (pts))
2995 parse->priv->next_dts = pts;
2997 /* always pass all available data */
2998 data = gst_adapter_map (parse->priv->adapter, av);
2999 /* arrange for actual data to be copied if subclass tries to,
3000 * since what is passed is tied to the adapter */
3001 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
3002 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
3004 /* already inform subclass what timestamps we have planned,
3005 * at least if provided by time-based upstream */
3006 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3007 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3008 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3011 /* keep the adapter mapped, so keep track of what has to be flushed */
3012 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3015 /* probably already implicitly unmapped due to adapter operation,
3016 * but for good measure ... */
3017 gst_adapter_unmap (parse->priv->adapter);
3018 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3021 if (skip == 0 && flush == 0) {
3022 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3023 "breaking to get more data");
3024 /* ignore this return as it produced no data */
3032 GST_LOG_OBJECT (parse, "chain leaving");
3036 /* pull @size bytes at current offset,
3037 * i.e. at least try to and possibly return a shorter buffer if near the end */
3038 static GstFlowReturn
3039 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3040 GstBuffer ** buffer)
3042 GstFlowReturn ret = GST_FLOW_OK;
3044 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3046 /* Caching here actually makes much less difference than one would expect.
3047 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3048 if (parse->priv->cache) {
3049 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3050 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3052 if (cache_offset <= parse->priv->offset &&
3053 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3054 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3055 parse->priv->offset - cache_offset, size);
3056 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3059 /* not enough data in the cache, free cache and get a new one */
3060 gst_buffer_unref (parse->priv->cache);
3061 parse->priv->cache = NULL;
3064 /* refill the cache */
3066 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3067 64 * 1024), &parse->priv->cache);
3068 if (ret != GST_FLOW_OK) {
3069 parse->priv->cache = NULL;
3073 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3075 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3077 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3081 /* Not possible to get enough data, try a last time with
3082 * requesting exactly the size we need */
3083 gst_buffer_unref (parse->priv->cache);
3084 parse->priv->cache = NULL;
3086 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3087 &parse->priv->cache);
3089 if (ret != GST_FLOW_OK) {
3090 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3095 if (gst_buffer_get_size (parse->priv->cache) < size) {
3096 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3097 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3098 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3100 *buffer = parse->priv->cache;
3101 parse->priv->cache = NULL;
3107 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3108 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3113 static GstFlowReturn
3114 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3117 GstClockTime ts = 0;
3121 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3122 ", last_offset = %" G_GINT64_FORMAT,
3123 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3125 if (!parse->priv->last_offset
3126 || parse->priv->last_pts <= parse->segment.start) {
3127 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3128 GST_TIME_ARGS (parse->segment.start));
3133 /* last fragment started at last_offset / last_ts;
3134 * seek back 10s capped at 1MB */
3135 if (parse->priv->last_pts >= 10 * GST_SECOND)
3136 ts = parse->priv->last_pts - 10 * GST_SECOND;
3137 /* if we are exact now, we will be more so going backwards */
3138 if (parse->priv->exact_position) {
3139 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3141 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3142 GST_FORMAT_BYTES, &offset)) {
3143 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3146 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3147 parse->priv->last_offset - 1024);
3148 offset = MAX (0, offset);
3150 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3152 parse->priv->offset = offset;
3154 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3156 if (ret != GST_FLOW_OK)
3159 /* offset will increase again as fragment is processed/parsed */
3160 parse->priv->last_offset = offset;
3162 gst_base_parse_start_fragment (parse);
3163 gst_adapter_push (parse->priv->adapter, buffer);
3164 ret = gst_base_parse_finish_fragment (parse, TRUE);
3165 if (ret != GST_FLOW_OK)
3168 /* force previous fragment */
3169 parse->priv->offset = -1;
3176 * pull and scan for next frame starting from current offset
3177 * ajusts sync, drain and offset going along */
3178 static GstFlowReturn
3179 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3182 GstFlowReturn ret = GST_FLOW_OK;
3183 guint fsize, min_size;
3187 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3188 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3190 /* let's make this efficient for all subclass once and for all;
3191 * maybe it does not need this much, but in the latter case, we know we are
3192 * in pull mode here and might as well try to read and supply more anyway
3193 * (so does the buffer caching mechanism) */
3197 min_size = MAX (parse->priv->min_frame_size, fsize);
3199 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3201 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3202 if (ret != GST_FLOW_OK)
3205 /* if we got a short read, inform subclass we are draining leftover
3206 * and no more is to be expected */
3207 if (gst_buffer_get_size (buffer) < min_size) {
3208 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3209 parse->priv->drain = TRUE;
3212 if (parse->priv->detecting) {
3213 ret = klass->detect (parse, buffer);
3214 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3215 /* If draining we error out, otherwise request a buffer
3217 if (parse->priv->drain) {
3218 gst_buffer_unref (buffer);
3219 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3220 return GST_FLOW_ERROR;
3223 gst_buffer_unref (buffer);
3226 } else if (ret != GST_FLOW_OK) {
3227 gst_buffer_unref (buffer);
3228 GST_ERROR_OBJECT (parse, "detect() returned %s",
3229 gst_flow_get_name (ret));
3233 /* Else handle this buffer normally */
3236 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3237 if (ret != GST_FLOW_OK)
3240 /* If a large amount of data was requested to be skipped, _handle_buffer
3241 might have set the priv->skip flag to an extra amount on top of skip.
3242 In pull mode, we can just pull from the new offset directly. */
3243 parse->priv->offset += parse->priv->skip;
3244 parse->priv->skip = 0;
3246 /* something flushed means something happened,
3247 * and we should bail out of this loop so as not to occupy
3248 * the task thread indefinitely */
3250 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3253 /* nothing flushed, no skip and draining, so nothing left to do */
3254 if (!skip && parse->priv->drain) {
3255 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3256 "breaking loop and marking EOS");
3260 /* otherwise, get some more data
3261 * note that is checked this does not happen indefinitely */
3263 GST_LOG_OBJECT (parse, "getting some more data");
3266 parse->priv->drain = FALSE;
3273 /* Loop that is used in pull mode to retrieve data from upstream */
3275 gst_base_parse_loop (GstPad * pad)
3277 GstBaseParse *parse;
3278 GstBaseParseClass *klass;
3279 GstFlowReturn ret = GST_FLOW_OK;
3281 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3282 klass = GST_BASE_PARSE_GET_CLASS (parse);
3284 GST_LOG_OBJECT (parse, "Entering parse loop");
3286 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3291 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3294 event = gst_event_new_stream_start (stream_id);
3295 gst_event_set_group_id (event, gst_util_group_id_next ());
3297 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3298 gst_pad_push_event (parse->srcpad, event);
3299 parse->priv->push_stream_start = FALSE;
3303 /* reverse playback:
3304 * first fragment (closest to stop time) is handled normally below,
3305 * then we pull in fragments going backwards */
3306 if (parse->segment.rate < 0.0) {
3307 /* check if we jumped back to a previous fragment,
3308 * which is a post-first fragment */
3309 if (parse->priv->offset < 0) {
3310 ret = gst_base_parse_handle_previous_fragment (parse);
3315 ret = gst_base_parse_scan_frame (parse, klass);
3316 if (ret != GST_FLOW_OK)
3319 /* eat expected eos signalling past segment in reverse playback */
3320 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3321 parse->segment.position >= parse->segment.stop) {
3322 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3323 /* push what was accumulated during loop run */
3324 gst_base_parse_finish_fragment (parse, FALSE);
3325 /* force previous fragment */
3326 parse->priv->offset = -1;
3331 if (ret == GST_FLOW_EOS)
3333 else if (ret != GST_FLOW_OK)
3336 gst_object_unref (parse);
3343 GST_DEBUG_OBJECT (parse, "eos");
3348 gboolean push_eos = FALSE;
3350 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3351 gst_flow_get_name (ret));
3352 gst_pad_pause_task (parse->sinkpad);
3354 if (ret == GST_FLOW_EOS) {
3355 /* handle end-of-stream/segment */
3356 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3359 if ((stop = parse->segment.stop) == -1)
3360 stop = parse->segment.duration;
3362 GST_DEBUG_OBJECT (parse, "sending segment_done");
3364 gst_element_post_message
3365 (GST_ELEMENT_CAST (parse),
3366 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3367 GST_FORMAT_TIME, stop));
3368 gst_pad_push_event (parse->srcpad,
3369 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3371 /* If we STILL have zero frames processed, fire an error */
3372 if (parse->priv->framecount == 0) {
3373 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3374 ("No valid frames found before end of stream"), (NULL));
3378 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3379 /* for fatal errors we post an error message, wrong-state is
3380 * not fatal because it happens due to flushes and only means
3381 * that we should stop now. */
3382 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3383 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3387 /* Push pending events, including SEGMENT events */
3388 gst_base_parse_push_pending_events (parse);
3390 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3392 gst_object_unref (parse);
3397 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3399 GstSchedulingFlags sched_flags;
3400 GstBaseParse *parse;
3404 parse = GST_BASE_PARSE (parent);
3406 GST_DEBUG_OBJECT (parse, "sink activate");
3408 query = gst_query_new_scheduling ();
3409 if (!gst_pad_peer_query (sinkpad, query)) {
3410 gst_query_unref (query);
3411 goto baseparse_push;
3414 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3416 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3417 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3419 gst_query_unref (query);
3422 goto baseparse_push;
3424 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3425 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3426 goto baseparse_push;
3428 parse->priv->push_stream_start = TRUE;
3430 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3435 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3436 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3441 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3443 GstBaseParseClass *klass;
3444 gboolean result = TRUE;
3446 GST_DEBUG_OBJECT (parse, "activate %d", active);
3448 klass = GST_BASE_PARSE_GET_CLASS (parse);
3451 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3452 result = klass->start (parse);
3454 /* If the subclass implements ::detect we want to
3455 * call it for the first buffers now */
3456 parse->priv->detecting = (klass->detect != NULL);
3458 /* We must make sure streaming has finished before resetting things
3459 * and calling the ::stop vfunc */
3460 GST_PAD_STREAM_LOCK (parse->sinkpad);
3461 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3463 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3464 result = klass->stop (parse);
3466 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3468 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3473 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3474 GstPadMode mode, gboolean active)
3477 GstBaseParse *parse;
3479 parse = GST_BASE_PARSE (parent);
3481 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3482 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3484 if (!gst_base_parse_activate (parse, active))
3485 goto activate_failed;
3488 case GST_PAD_MODE_PULL:
3490 parse->priv->pending_events =
3491 g_list_prepend (parse->priv->pending_events,
3492 gst_event_new_segment (&parse->segment));
3495 result = gst_pad_stop_task (pad);
3503 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3505 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3512 GST_DEBUG_OBJECT (parse, "activate failed");
3518 * gst_base_parse_set_duration:
3519 * @parse: #GstBaseParse.
3521 * @duration: duration value.
3522 * @interval: how often to update the duration estimate based on bitrate, or 0.
3524 * Sets the duration of the currently playing media. Subclass can use this
3525 * when it is able to determine duration and/or notices a change in the media
3526 * duration. Alternatively, if @interval is non-zero (default), then stream
3527 * duration is determined based on estimated bitrate, and updated every @interval
3531 gst_base_parse_set_duration (GstBaseParse * parse,
3532 GstFormat fmt, gint64 duration, gint interval)
3534 g_return_if_fail (parse != NULL);
3536 if (parse->priv->upstream_has_duration) {
3537 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3541 if (duration != parse->priv->duration) {
3544 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3545 gst_element_post_message (GST_ELEMENT (parse), m);
3547 /* TODO: what about duration tag? */
3549 parse->priv->duration = duration;
3550 parse->priv->duration_fmt = fmt;
3551 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3552 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3553 if (interval != 0) {
3554 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3558 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3559 parse->priv->update_interval = interval;
3565 * gst_base_parse_set_average_bitrate:
3566 * @parse: #GstBaseParse.
3567 * @bitrate: average bitrate in bits/second
3569 * Optionally sets the average bitrate detected in media (if non-zero),
3570 * e.g. based on metadata, as it will be posted to the application.
3572 * By default, announced average bitrate is estimated. The average bitrate
3573 * is used to estimate the total duration of the stream and to estimate
3574 * a seek position, if there's no index and the format is syncable
3575 * (see gst_base_parse_set_syncable()).
3578 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3580 parse->priv->bitrate = bitrate;
3581 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3585 * gst_base_parse_set_min_frame_size:
3586 * @parse: #GstBaseParse.
3587 * @min_size: Minimum size of the data that this base class should give to
3590 * Subclass can use this function to tell the base class that it needs to
3591 * give at least #min_size buffers.
3594 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3596 g_return_if_fail (parse != NULL);
3598 parse->priv->min_frame_size = min_size;
3599 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3603 * gst_base_parse_set_frame_rate:
3604 * @parse: the #GstBaseParse to set
3605 * @fps_num: frames per second (numerator).
3606 * @fps_den: frames per second (denominator).
3607 * @lead_in: frames needed before a segment for subsequent decode
3608 * @lead_out: frames needed after a segment
3610 * If frames per second is configured, parser can take care of buffer duration
3611 * and timestamping. When performing segment clipping, or seeking to a specific
3612 * location, a corresponding decoder might need an initial @lead_in and a
3613 * following @lead_out number of frames to ensure the desired segment is
3614 * entirely filled upon decoding.
3617 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3618 guint fps_den, guint lead_in, guint lead_out)
3620 g_return_if_fail (parse != NULL);
3622 parse->priv->fps_num = fps_num;
3623 parse->priv->fps_den = fps_den;
3624 if (!fps_num || !fps_den) {
3625 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3627 fps_num = fps_den = 0;
3628 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3629 parse->priv->lead_in = parse->priv->lead_out = 0;
3630 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3632 parse->priv->frame_duration =
3633 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3634 parse->priv->lead_in = lead_in;
3635 parse->priv->lead_out = lead_out;
3636 parse->priv->lead_in_ts =
3637 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3638 parse->priv->lead_out_ts =
3639 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3640 /* aim for about 1.5s to estimate duration */
3641 if (parse->priv->update_interval < 0) {
3642 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3643 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3644 parse->priv->update_interval);
3647 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3648 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3649 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3650 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3651 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3652 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3656 * gst_base_parse_set_has_timing_info:
3657 * @parse: a #GstBaseParse
3658 * @has_timing: whether frames carry timing information
3660 * Set if frames carry timing information which the subclass can (generally)
3661 * parse and provide. In particular, intrinsic (rather than estimated) time
3662 * can be obtained following a seek.
3665 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3667 parse->priv->has_timing_info = has_timing;
3668 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3672 * gst_base_parse_set_syncable:
3673 * @parse: a #GstBaseParse
3674 * @syncable: set if frame starts can be identified
3676 * Set if frame starts can be identified. This is set by default and
3677 * determines whether seeking based on bitrate averages
3678 * is possible for a format/stream.
3681 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3683 parse->priv->syncable = syncable;
3684 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3688 * gst_base_parse_set_passthrough:
3689 * @parse: a #GstBaseParse
3690 * @passthrough: %TRUE if parser should run in passthrough mode
3692 * Set if the nature of the format or configuration does not allow (much)
3693 * parsing, and the parser should operate in passthrough mode (which only
3694 * applies when operating in push mode). That is, incoming buffers are
3695 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3696 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3697 * so subclass can perform as much or as little is appropriate for
3698 * passthrough semantics in @pre_push_frame.
3701 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3703 parse->priv->passthrough = passthrough;
3704 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3708 * gst_base_parse_set_pts_interpolation:
3709 * @parse: a #GstBaseParse
3710 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3712 * By default, the base class will guess PTS timestamps using a simple
3713 * interpolation (previous timestamp + duration), which is incorrect for
3714 * data streams with reordering, where PTS can go backward. Sub-classes
3715 * implementing such formats should disable PTS interpolation.
3718 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3719 gboolean pts_interpolate)
3721 parse->priv->pts_interpolate = pts_interpolate;
3722 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3723 (pts_interpolate) ? "yes" : "no");
3727 * gst_base_parse_set_infer_ts:
3728 * @parse: a #GstBaseParse
3729 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3731 * By default, the base class might try to infer PTS from DTS and vice
3732 * versa. While this is generally correct for audio data, it may not
3733 * be otherwise. Sub-classes implementing such formats should disable
3734 * timestamp inferring.
3737 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3739 parse->priv->infer_ts = infer_ts;
3740 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3744 * gst_base_parse_set_latency:
3745 * @parse: a #GstBaseParse
3746 * @min_latency: minimum parse latency
3747 * @max_latency: maximum parse latency
3749 * Sets the minimum and maximum (which may likely be equal) latency introduced
3750 * by the parsing process. If there is such a latency, which depends on the
3751 * particular parsing of the format, it typically corresponds to 1 frame duration.
3754 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3755 GstClockTime max_latency)
3757 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3758 g_return_if_fail (min_latency <= max_latency);
3760 GST_OBJECT_LOCK (parse);
3761 parse->priv->min_latency = min_latency;
3762 parse->priv->max_latency = max_latency;
3763 GST_OBJECT_UNLOCK (parse);
3764 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3765 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3766 GST_TIME_ARGS (max_latency));
3770 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3771 GstClockTime * duration)
3773 gboolean res = FALSE;
3775 g_return_val_if_fail (duration != NULL, FALSE);
3777 *duration = GST_CLOCK_TIME_NONE;
3778 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3779 GST_LOG_OBJECT (parse, "using provided duration");
3780 *duration = parse->priv->duration;
3782 } else if (parse->priv->duration != -1) {
3783 GST_LOG_OBJECT (parse, "converting provided duration");
3784 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3785 parse->priv->duration, format, (gint64 *) duration);
3786 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3787 GST_LOG_OBJECT (parse, "using estimated duration");
3788 *duration = parse->priv->estimated_duration;
3791 GST_LOG_OBJECT (parse, "cannot estimate duration");
3794 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3795 GST_TIME_ARGS (*duration));
3800 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3802 gboolean res = FALSE;
3805 pad = GST_BASE_PARSE_SRC_PAD (parse);
3807 switch (GST_QUERY_TYPE (query)) {
3808 case GST_QUERY_POSITION:
3813 GST_DEBUG_OBJECT (parse, "position query");
3814 gst_query_parse_position (query, &format, NULL);
3816 /* try upstream first */
3817 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3819 /* Fall back on interpreting segment */
3820 GST_OBJECT_LOCK (parse);
3821 if (format == GST_FORMAT_BYTES) {
3822 dest_value = parse->priv->offset;
3824 } else if (format == parse->segment.format &&
3825 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3826 dest_value = gst_segment_to_stream_time (&parse->segment,
3827 parse->segment.format, parse->segment.position);
3830 GST_OBJECT_UNLOCK (parse);
3832 /* no precise result, upstream no idea either, then best estimate */
3833 /* priv->offset is updated in both PUSH/PULL modes */
3834 res = gst_base_parse_convert (parse,
3835 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3838 gst_query_set_position (query, format, dest_value);
3842 case GST_QUERY_DURATION:
3845 GstClockTime duration;
3847 GST_DEBUG_OBJECT (parse, "duration query");
3848 gst_query_parse_duration (query, &format, NULL);
3850 /* consult upstream */
3851 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3853 /* otherwise best estimate from us */
3855 res = gst_base_parse_get_duration (parse, format, &duration);
3857 gst_query_set_duration (query, format, duration);
3861 case GST_QUERY_SEEKING:
3864 GstClockTime duration = GST_CLOCK_TIME_NONE;
3865 gboolean seekable = FALSE;
3867 GST_DEBUG_OBJECT (parse, "seeking query");
3868 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3870 /* consult upstream */
3871 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3873 /* we may be able to help if in TIME */
3874 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3875 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3876 /* already OK if upstream takes care */
3877 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3879 if (!(res && seekable)) {
3880 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3881 || duration == -1) {
3882 /* seekable if we still have a chance to get duration later on */
3884 parse->priv->upstream_seekable && parse->priv->update_interval;
3886 seekable = parse->priv->upstream_seekable;
3887 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3890 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3896 case GST_QUERY_FORMATS:
3897 gst_query_set_formatsv (query, 3, fmtlist);
3900 case GST_QUERY_CONVERT:
3902 GstFormat src_format, dest_format;
3903 gint64 src_value, dest_value;
3905 gst_query_parse_convert (query, &src_format, &src_value,
3906 &dest_format, &dest_value);
3908 res = gst_base_parse_convert (parse, src_format, src_value,
3909 dest_format, &dest_value);
3911 gst_query_set_convert (query, src_format, src_value,
3912 dest_format, dest_value);
3916 case GST_QUERY_LATENCY:
3918 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3920 GstClockTime min_latency, max_latency;
3922 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3923 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3924 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3925 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3927 GST_OBJECT_LOCK (parse);
3928 /* add our latency */
3929 min_latency += parse->priv->min_latency;
3930 if (max_latency == -1 || parse->priv->max_latency == -1)
3933 max_latency += parse->priv->max_latency;
3934 GST_OBJECT_UNLOCK (parse);
3936 gst_query_set_latency (query, live, min_latency, max_latency);
3940 case GST_QUERY_SEGMENT:
3945 format = parse->segment.format;
3948 gst_segment_to_stream_time (&parse->segment, format,
3949 parse->segment.start);
3950 if ((stop = parse->segment.stop) == -1)
3951 stop = parse->segment.duration;
3953 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3955 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3960 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3966 /* scans for a cluster start from @pos,
3967 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3968 static GstFlowReturn
3969 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3970 GstClockTime * time, GstClockTime * duration)
3972 GstBaseParseClass *klass;
3974 gboolean orig_drain, orig_discont;
3975 GstFlowReturn ret = GST_FLOW_OK;
3976 GstBuffer *buf = NULL;
3977 GstBaseParseFrame *sframe = NULL;
3979 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3980 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3981 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3983 klass = GST_BASE_PARSE_GET_CLASS (parse);
3985 *time = GST_CLOCK_TIME_NONE;
3986 *duration = GST_CLOCK_TIME_NONE;
3989 orig_offset = parse->priv->offset;
3990 orig_discont = parse->priv->discont;
3991 orig_drain = parse->priv->drain;
3993 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3994 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3996 /* jump elsewhere and locate next frame */
3997 parse->priv->offset = *pos;
3998 /* mark as scanning so frames don't get processed all the way */
3999 parse->priv->scanning = TRUE;
4000 ret = gst_base_parse_scan_frame (parse, klass);
4001 parse->priv->scanning = FALSE;
4002 /* retrieve frame found during scan */
4003 sframe = parse->priv->scanned_frame;
4004 parse->priv->scanned_frame = NULL;
4006 if (ret != GST_FLOW_OK || !sframe)
4009 /* get offset first, subclass parsing might dump other stuff in there */
4010 *pos = sframe->offset;
4011 buf = sframe->buffer;
4014 /* but it should provide proper time */
4015 *time = GST_BUFFER_TIMESTAMP (buf);
4016 *duration = GST_BUFFER_DURATION (buf);
4018 GST_LOG_OBJECT (parse,
4019 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4020 GST_TIME_ARGS (*time), *pos);
4024 gst_base_parse_frame_free (sframe);
4027 parse->priv->offset = orig_offset;
4028 parse->priv->discont = orig_discont;
4029 parse->priv->drain = orig_drain;
4034 /* bisect and scan through file for frame starting before @time,
4035 * returns OK and @time/@offset if found, NONE and/or error otherwise
4036 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4037 static GstFlowReturn
4038 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4041 GstFlowReturn ret = GST_FLOW_OK;
4042 gint64 lpos, hpos, newpos;
4043 GstClockTime time, ltime, htime, newtime, dur;
4044 gboolean cont = TRUE;
4045 const GstClockTime tolerance = TARGET_DIFFERENCE;
4046 const guint chunk = 4 * 1024;
4048 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4049 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4051 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4052 GST_TIME_ARGS (*_time));
4054 /* TODO also make keyframe aware if useful some day */
4069 /* do not know at first */
4071 *_time = GST_CLOCK_TIME_NONE;
4073 /* need initial positions; start and end */
4074 lpos = parse->priv->first_frame_offset;
4075 ltime = parse->priv->first_frame_pts;
4076 /* try other one if no luck */
4077 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4078 ltime = parse->priv->first_frame_dts;
4079 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4080 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4081 return GST_FLOW_ERROR;
4083 hpos = parse->priv->upstream_size;
4085 GST_DEBUG_OBJECT (parse,
4086 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4087 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4088 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4090 /* check preconditions are satisfied;
4091 * start and end are needed, except for special case where we scan for
4092 * last frame to determine duration */
4093 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4094 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4095 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4099 /* shortcut cases */
4102 } else if (time < ltime + tolerance) {
4106 } else if (time >= htime) {
4112 while (htime > ltime && cont) {
4113 GST_LOG_OBJECT (parse,
4114 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4115 GST_TIME_ARGS (ltime));
4116 GST_LOG_OBJECT (parse,
4117 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4118 GST_TIME_ARGS (htime));
4119 if (G_UNLIKELY (time == G_MAXINT64)) {
4121 } else if (G_LIKELY (hpos > lpos)) {
4123 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4126 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4128 /* we check this case once, but not forever, so break loop */
4133 newpos = CLAMP (newpos, lpos, hpos);
4134 GST_LOG_OBJECT (parse,
4135 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4136 GST_TIME_ARGS (time), newpos);
4138 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4139 if (ret == GST_FLOW_EOS) {
4140 /* heuristic HACK */
4141 hpos = MAX (lpos, hpos - chunk);
4143 } else if (ret != GST_FLOW_OK) {
4147 if (newtime == -1 || newpos == -1) {
4148 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4152 if (G_UNLIKELY (time == G_MAXINT64)) {
4155 if (GST_CLOCK_TIME_IS_VALID (dur))
4158 } else if (newtime > time) {
4160 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4162 } else if (newtime + tolerance > time) {
4163 /* close enough undershoot */
4167 } else if (newtime < ltime) {
4168 /* so a position beyond lpos resulted in earlier time than ltime ... */
4169 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4172 /* undershoot too far */
4173 newpos += newpos == lpos ? chunk : 0;
4174 lpos = CLAMP (newpos, lpos, hpos);
4180 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4181 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4186 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4187 gboolean before, GstClockTime * _ts)
4189 gint64 bytes = 0, ts = 0;
4190 GstIndexEntry *entry = NULL;
4192 if (time == GST_CLOCK_TIME_NONE) {
4198 GST_BASE_PARSE_INDEX_LOCK (parse);
4199 if (parse->priv->index) {
4200 /* Let's check if we have an index entry for that time */
4201 entry = gst_index_get_assoc_entry (parse->priv->index,
4202 parse->priv->index_id,
4203 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4204 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4208 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4209 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4211 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4212 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4213 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4215 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4216 GST_TIME_ARGS (time));
4219 ts = GST_CLOCK_TIME_NONE;
4222 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4231 /* returns TRUE if seek succeeded */
4233 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4238 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4239 gboolean flush, update, res = TRUE, accurate;
4240 gint64 start, stop, seekpos, seekstop;
4241 GstSegment seeksegment = { 0, };
4242 GstClockTime start_ts;
4244 GstEvent *segment_event;
4246 /* try upstream first, unless we're driving the streaming thread ourselves */
4247 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4248 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4253 gst_event_parse_seek (event, &rate, &format, &flags,
4254 &start_type, &start, &stop_type, &stop);
4255 seqnum = gst_event_get_seqnum (event);
4257 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4258 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4259 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4260 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4262 /* we can only handle TIME, so check if subclass can convert
4263 * to TIME format if it's some other format (such as DEFAULT) */
4264 if (format != GST_FORMAT_TIME) {
4265 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4266 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4268 goto no_convert_to_time;
4270 GST_INFO_OBJECT (parse, "converted %s format to start time "
4271 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4272 gst_format_get_name (format), GST_TIME_ARGS (start),
4273 GST_TIME_ARGS (stop));
4275 format = GST_FORMAT_TIME;
4278 /* no negative rates in push mode (unless upstream takes care of that, but
4279 * we've already tried upstream and it didn't handle the seek request) */
4280 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4283 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4284 goto negative_rate_pull_mode;
4286 if (start_type != GST_SEEK_TYPE_SET ||
4287 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4290 /* get flush flag */
4291 flush = flags & GST_SEEK_FLAG_FLUSH;
4293 /* copy segment, we need this because we still need the old
4294 * segment when we close the current segment. */
4295 gst_segment_copy_into (&parse->segment, &seeksegment);
4297 GST_DEBUG_OBJECT (parse, "configuring seek");
4298 gst_segment_do_seek (&seeksegment, rate, format, flags,
4299 start_type, start, stop_type, stop, &update);
4301 /* accurate seeking implies seek tables are used to obtain position,
4302 * and the requested segment is maintained exactly, not adjusted any way */
4303 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4305 /* maybe we can be accurate for (almost) free */
4306 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4307 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4308 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4312 GstClockTime startpos = seeksegment.position;
4314 /* accurate requested, so ... seek a bit before target */
4315 if (startpos < parse->priv->lead_in_ts)
4318 startpos -= parse->priv->lead_in_ts;
4319 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4320 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4323 start_ts = seeksegment.position;
4324 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4325 GST_FORMAT_BYTES, &seekpos))
4326 goto convert_failed;
4327 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4328 GST_FORMAT_BYTES, &seekstop))
4329 goto convert_failed;
4332 GST_DEBUG_OBJECT (parse,
4333 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4335 GST_DEBUG_OBJECT (parse,
4336 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4337 seeksegment.stop, seekstop);
4339 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4342 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4345 if (parse->srcpad) {
4346 GstEvent *fevent = gst_event_new_flush_start ();
4347 GST_DEBUG_OBJECT (parse, "sending flush start");
4349 gst_event_set_seqnum (fevent, seqnum);
4351 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4352 /* unlock upstream pull_range */
4353 gst_pad_push_event (parse->sinkpad, fevent);
4356 gst_pad_pause_task (parse->sinkpad);
4359 /* we should now be able to grab the streaming thread because we stopped it
4360 * with the above flush/pause code */
4361 GST_PAD_STREAM_LOCK (parse->sinkpad);
4363 /* save current position */
4364 last_stop = parse->segment.position;
4365 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4368 /* now commit to new position */
4370 /* prepare for streaming again */
4372 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4373 GST_DEBUG_OBJECT (parse, "sending flush stop");
4374 gst_event_set_seqnum (fevent, seqnum);
4375 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4376 gst_pad_push_event (parse->sinkpad, fevent);
4377 gst_base_parse_clear_queues (parse);
4379 /* keep track of our position */
4380 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4381 seeksegment.format, parse->segment.position);
4384 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4386 /* store the newsegment event so it can be sent from the streaming thread. */
4387 /* This will be sent later in _loop() */
4388 segment_event = gst_event_new_segment (&parse->segment);
4389 gst_event_set_seqnum (segment_event, seqnum);
4390 parse->priv->pending_events =
4391 g_list_prepend (parse->priv->pending_events, segment_event);
4393 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4394 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4395 ", time = %" GST_TIME_FORMAT, format,
4396 GST_TIME_ARGS (parse->segment.start),
4397 GST_TIME_ARGS (parse->segment.stop),
4398 GST_TIME_ARGS (parse->segment.time));
4400 /* one last chance in pull mode to stay accurate;
4401 * maybe scan and subclass can find where to go */
4404 GstClockTime ts = seeksegment.position;
4406 gst_base_parse_locate_time (parse, &ts, &scanpos);
4410 /* running collected index now consists of several intervals,
4411 * so optimized check no longer possible */
4412 parse->priv->index_last_valid = FALSE;
4413 parse->priv->index_last_offset = 0;
4414 parse->priv->index_last_ts = 0;
4418 /* mark discont if we are going to stream from another position. */
4419 if (seekpos != parse->priv->offset) {
4420 GST_DEBUG_OBJECT (parse,
4421 "mark DISCONT, we did a seek to another position");
4422 parse->priv->offset = seekpos;
4423 parse->priv->last_offset = seekpos;
4424 parse->priv->seen_keyframe = FALSE;
4425 parse->priv->discont = TRUE;
4426 parse->priv->next_dts = start_ts;
4427 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4428 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4429 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4430 parse->priv->sync_offset = seekpos;
4431 parse->priv->exact_position = accurate;
4434 /* Start streaming thread if paused */
4435 gst_pad_start_task (parse->sinkpad,
4436 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4438 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4443 GstEvent *new_event;
4444 GstBaseParseSeek *seek;
4445 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4447 /* The only thing we need to do in PUSH-mode is to send the
4448 seek event (in bytes) to upstream. Segment / flush handling happens
4449 in corresponding src event handlers */
4450 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4451 if (seekstop >= 0 && seekstop <= seekpos)
4453 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4454 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4455 gst_event_set_seqnum (new_event, seqnum);
4457 /* store segment info so its precise details can be reconstructed when
4458 * receiving newsegment;
4459 * this matters for all details when accurate seeking,
4460 * is most useful to preserve NONE stop time otherwise */
4461 seek = g_new0 (GstBaseParseSeek, 1);
4462 seek->segment = seeksegment;
4463 seek->accurate = accurate;
4464 seek->offset = seekpos;
4465 seek->start_ts = start_ts;
4466 GST_OBJECT_LOCK (parse);
4467 /* less optimal, but preserves order */
4468 parse->priv->pending_seeks =
4469 g_slist_append (parse->priv->pending_seeks, seek);
4470 GST_OBJECT_UNLOCK (parse);
4472 res = gst_pad_push_event (parse->sinkpad, new_event);
4475 GST_OBJECT_LOCK (parse);
4476 parse->priv->pending_seeks =
4477 g_slist_remove (parse->priv->pending_seeks, seek);
4478 GST_OBJECT_UNLOCK (parse);
4484 gst_event_unref (event);
4488 negative_rate_pull_mode:
4490 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4496 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4502 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4508 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4509 "couldn't convert that into TIME format", gst_format_get_name (format));
4515 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4521 /* Checks if bitrates are available from upstream tags so that we don't
4522 * override them later
4525 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4527 GstTagList *taglist = NULL;
4530 gst_event_parse_tag (event, &taglist);
4532 /* We only care about stream tags here */
4533 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4536 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4537 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4538 parse->priv->post_min_bitrate = FALSE;
4540 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4541 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4542 parse->priv->post_avg_bitrate = FALSE;
4544 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4545 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4546 parse->priv->post_max_bitrate = FALSE;
4552 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4554 GstBaseParse *parse = GST_BASE_PARSE (element);
4556 GST_BASE_PARSE_INDEX_LOCK (parse);
4557 if (parse->priv->index)
4558 gst_object_unref (parse->priv->index);
4560 parse->priv->index = gst_object_ref (index);
4561 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4562 &parse->priv->index_id);
4563 parse->priv->own_index = FALSE;
4565 parse->priv->index = NULL;
4567 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4571 gst_base_parse_get_index (GstElement * element)
4573 GstBaseParse *parse = GST_BASE_PARSE (element);
4574 GstIndex *result = NULL;
4576 GST_BASE_PARSE_INDEX_LOCK (parse);
4577 if (parse->priv->index)
4578 result = gst_object_ref (parse->priv->index);
4579 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4585 static GstStateChangeReturn
4586 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4588 GstBaseParse *parse;
4589 GstStateChangeReturn result;
4591 parse = GST_BASE_PARSE (element);
4593 switch (transition) {
4594 case GST_STATE_CHANGE_READY_TO_PAUSED:
4595 /* If this is our own index destroy it as the
4596 * old entries might be wrong for the new stream */
4597 GST_BASE_PARSE_INDEX_LOCK (parse);
4598 if (parse->priv->own_index) {
4599 gst_object_unref (parse->priv->index);
4600 parse->priv->index = NULL;
4601 parse->priv->own_index = FALSE;
4604 /* If no index was created, generate one */
4605 if (G_UNLIKELY (!parse->priv->index)) {
4606 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4608 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4609 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4610 &parse->priv->index_id);
4611 parse->priv->own_index = TRUE;
4613 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4619 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4621 switch (transition) {
4622 case GST_STATE_CHANGE_PAUSED_TO_READY:
4623 gst_base_parse_reset (parse);
4633 * gst_base_parse_set_ts_at_offset:
4634 * @parse: a #GstBaseParse
4635 * @offset: offset into current buffer
4637 * This function should only be called from a @handle_frame implementation.
4639 * #GstBaseParse creates initial timestamps for frames by using the last
4640 * timestamp seen in the stream before the frame starts. In certain
4641 * cases, the correct timestamps will occur in the stream after the
4642 * start of the frame, but before the start of the actual picture data.
4643 * This function can be used to set the timestamps based on the offset
4644 * into the frame data that the picture starts.
4649 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4651 GstClockTime pts, dts;
4653 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4655 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4656 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4658 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4659 GST_DEBUG_OBJECT (parse,
4660 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4661 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4663 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4664 parse->priv->prev_pts = parse->priv->next_pts = pts;
4666 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4667 parse->priv->prev_dts = parse->priv->next_dts = dts;