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;
269 GstClockTime next_pts;
270 GstClockTime next_dts;
271 GstClockTime prev_pts;
272 GstClockTime prev_dts;
273 GstClockTime frame_duration;
274 gboolean seen_keyframe;
280 guint64 data_bytecount;
281 guint64 acc_duration;
282 GstClockTime first_frame_pts;
283 GstClockTime first_frame_dts;
284 gint64 first_frame_offset;
286 gboolean post_min_bitrate;
287 gboolean post_avg_bitrate;
288 gboolean post_max_bitrate;
292 guint posted_avg_bitrate;
294 /* frames/buffers that are queued and ready to go on OK */
295 GQueue queued_frames;
299 /* index entry storage, either ours or provided */
305 /* seek table entries only maintained if upstream is BYTE seekable */
306 gboolean upstream_seekable;
307 gboolean upstream_has_duration;
308 gint64 upstream_size;
309 GstFormat upstream_format;
310 /* minimum distance between two index entries */
311 GstClockTimeDiff idx_interval;
312 guint64 idx_byte_interval;
313 /* ts and offset of last entry added */
314 GstClockTime index_last_ts;
315 gint64 index_last_offset;
316 gboolean index_last_valid;
318 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
319 gboolean exact_position;
320 /* seek events are temporarily kept to match them with newsegments */
321 GSList *pending_seeks;
323 /* reverse playback */
324 GSList *buffers_pending;
325 GSList *buffers_head;
326 GSList *buffers_queued;
327 GSList *buffers_send;
328 GstClockTime last_pts;
329 GstClockTime last_dts;
332 /* Pending serialized events */
333 GList *pending_events;
335 /* If baseparse has checked the caps to identify if it is
336 * handling video or audio */
337 gboolean checked_media;
339 /* offset of last parsed frame/data */
341 /* force a new frame, regardless of offset */
343 /* whether we are merely scanning for a frame */
345 /* ... and resulting frame, if any */
346 GstBaseParseFrame *scanned_frame;
348 /* TRUE if we're still detecting the format, i.e.
349 * if ::detect() is still called for future buffers */
351 GList *detect_buffers;
352 guint detect_buffers_size;
354 /* True when no buffers have been received yet */
355 gboolean first_buffer;
357 /* if TRUE, a STREAM_START event needs to be pushed */
358 gboolean push_stream_start;
360 /* When we need to skip more data than we have currently */
364 typedef struct _GstBaseParseSeek
369 GstClockTime start_ts;
372 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
377 PROP_DISABLE_PASSTHROUGH,
381 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
382 g_mutex_lock (&parse->priv->index_lock);
383 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
384 g_mutex_unlock (&parse->priv->index_lock);
386 static GstElementClass *parent_class = NULL;
388 static void gst_base_parse_class_init (GstBaseParseClass * klass);
389 static void gst_base_parse_init (GstBaseParse * parse,
390 GstBaseParseClass * klass);
393 gst_base_parse_get_type (void)
395 static volatile gsize base_parse_type = 0;
397 if (g_once_init_enter (&base_parse_type)) {
398 static const GTypeInfo base_parse_info = {
399 sizeof (GstBaseParseClass),
400 (GBaseInitFunc) NULL,
401 (GBaseFinalizeFunc) NULL,
402 (GClassInitFunc) gst_base_parse_class_init,
405 sizeof (GstBaseParse),
407 (GInstanceInitFunc) gst_base_parse_init,
411 _type = g_type_register_static (GST_TYPE_ELEMENT,
412 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
413 g_once_init_leave (&base_parse_type, _type);
415 return (GType) base_parse_type;
418 static void gst_base_parse_finalize (GObject * object);
420 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
421 GstStateChange transition);
422 static void gst_base_parse_reset (GstBaseParse * parse);
425 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
426 static GstIndex *gst_base_parse_get_index (GstElement * element);
429 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
431 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
432 GstObject * parent, GstPadMode mode, gboolean active);
433 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
435 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
437 static void gst_base_parse_set_property (GObject * object, guint prop_id,
438 const GValue * value, GParamSpec * pspec);
439 static void gst_base_parse_get_property (GObject * object, guint prop_id,
440 GValue * value, GParamSpec * pspec);
442 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
444 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
447 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
449 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
452 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
454 static void gst_base_parse_loop (GstPad * pad);
456 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
457 GstBaseParseFrame * frame);
459 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
462 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
465 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
467 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
470 static void gst_base_parse_drain (GstBaseParse * parse);
472 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
473 gboolean post_min, gboolean post_avg, gboolean post_max);
475 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
476 GstClockTime time, gboolean before, GstClockTime * _ts);
477 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
478 GstClockTime * _time, gint64 * _offset);
480 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
481 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
483 static GstFlowReturn gst_base_parse_send_buffers (GstBaseParse * parse);
485 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
487 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
489 static void gst_base_parse_push_pending_events (GstBaseParse * parse);
492 gst_base_parse_clear_queues (GstBaseParse * parse)
494 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
495 g_slist_free (parse->priv->buffers_queued);
496 parse->priv->buffers_queued = NULL;
497 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
499 g_slist_free (parse->priv->buffers_pending);
500 parse->priv->buffers_pending = NULL;
501 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
502 g_slist_free (parse->priv->buffers_head);
503 parse->priv->buffers_head = NULL;
504 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
505 g_slist_free (parse->priv->buffers_send);
506 parse->priv->buffers_send = NULL;
508 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
509 g_list_free (parse->priv->detect_buffers);
510 parse->priv->detect_buffers = NULL;
511 parse->priv->detect_buffers_size = 0;
513 g_queue_foreach (&parse->priv->queued_frames,
514 (GFunc) gst_base_parse_frame_free, NULL);
515 g_queue_clear (&parse->priv->queued_frames);
517 gst_buffer_replace (&parse->priv->cache, NULL);
519 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
520 g_list_free (parse->priv->pending_events);
521 parse->priv->pending_events = NULL;
523 parse->priv->checked_media = FALSE;
527 gst_base_parse_finalize (GObject * object)
529 GstBaseParse *parse = GST_BASE_PARSE (object);
531 g_object_unref (parse->priv->adapter);
533 if (parse->priv->index) {
534 gst_object_unref (parse->priv->index);
535 parse->priv->index = NULL;
537 g_mutex_clear (&parse->priv->index_lock);
539 gst_base_parse_clear_queues (parse);
541 G_OBJECT_CLASS (parent_class)->finalize (object);
545 gst_base_parse_class_init (GstBaseParseClass * klass)
547 GObjectClass *gobject_class;
548 GstElementClass *gstelement_class;
550 gobject_class = G_OBJECT_CLASS (klass);
551 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
552 parent_class = g_type_class_peek_parent (klass);
554 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
555 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
556 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
559 * GstBaseParse:disable-passthrough:
561 * If set to %TRUE, baseparse will unconditionally force parsing of the
562 * incoming data. This can be required in the rare cases where the incoming
563 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
564 * force validation and parsing of the incoming data.
565 * If set to %FALSE, decision of whether to parse the data or not is up to
566 * the implementation (standard behaviour).
568 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
569 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
570 "Force processing (disables passthrough)",
571 DEFAULT_DISABLE_PASSTHROUGH,
572 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
574 gstelement_class = (GstElementClass *) klass;
575 gstelement_class->change_state =
576 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
579 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
580 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
583 /* Default handlers */
584 klass->sink_event = gst_base_parse_sink_event_default;
585 klass->src_event = gst_base_parse_src_event_default;
586 klass->sink_query = gst_base_parse_sink_query_default;
587 klass->src_query = gst_base_parse_src_query_default;
588 klass->convert = gst_base_parse_convert_default;
590 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
591 "baseparse element");
595 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
597 GstPadTemplate *pad_template;
599 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
601 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
604 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
605 g_return_if_fail (pad_template != NULL);
606 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
607 gst_pad_set_event_function (parse->sinkpad,
608 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
609 gst_pad_set_query_function (parse->sinkpad,
610 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
611 gst_pad_set_chain_function (parse->sinkpad,
612 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
613 gst_pad_set_activate_function (parse->sinkpad,
614 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
615 gst_pad_set_activatemode_function (parse->sinkpad,
616 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
617 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
618 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
620 GST_DEBUG_OBJECT (parse, "sinkpad created");
623 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
624 g_return_if_fail (pad_template != NULL);
625 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
626 gst_pad_set_event_function (parse->srcpad,
627 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
628 gst_pad_set_query_function (parse->srcpad,
629 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
630 gst_pad_use_fixed_caps (parse->srcpad);
631 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
632 GST_DEBUG_OBJECT (parse, "src created");
634 g_queue_init (&parse->priv->queued_frames);
636 parse->priv->adapter = gst_adapter_new ();
638 parse->priv->pad_mode = GST_PAD_MODE_NONE;
640 g_mutex_init (&parse->priv->index_lock);
643 gst_base_parse_reset (parse);
644 GST_DEBUG_OBJECT (parse, "init ok");
646 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
650 gst_base_parse_set_property (GObject * object, guint prop_id,
651 const GValue * value, GParamSpec * pspec)
653 GstBaseParse *parse = GST_BASE_PARSE (object);
656 case PROP_DISABLE_PASSTHROUGH:
657 parse->priv->disable_passthrough = g_value_get_boolean (value);
660 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
666 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
669 GstBaseParse *parse = GST_BASE_PARSE (object);
672 case PROP_DISABLE_PASSTHROUGH:
673 g_value_set_boolean (value, parse->priv->disable_passthrough);
676 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
681 static GstBaseParseFrame *
682 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
684 GstBaseParseFrame *copy;
686 copy = g_slice_dup (GstBaseParseFrame, frame);
687 copy->buffer = gst_buffer_ref (frame->buffer);
688 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
690 GST_TRACE ("copied frame %p -> %p", frame, copy);
696 gst_base_parse_frame_free (GstBaseParseFrame * frame)
698 GST_TRACE ("freeing frame %p", frame);
701 gst_buffer_unref (frame->buffer);
702 frame->buffer = NULL;
705 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
706 g_slice_free (GstBaseParseFrame, frame);
708 memset (frame, 0, sizeof (*frame));
712 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
713 (GBoxedCopyFunc) gst_base_parse_frame_copy,
714 (GBoxedFreeFunc) gst_base_parse_frame_free);
717 * gst_base_parse_frame_init:
718 * @frame: #GstBaseParseFrame.
720 * Sets a #GstBaseParseFrame to initial state. Currently this means
721 * all public fields are zero-ed and a private flag is set to make
722 * sure gst_base_parse_frame_free() only frees the contents but not
723 * the actual frame. Use this function to initialise a #GstBaseParseFrame
724 * allocated on the stack.
727 gst_base_parse_frame_init (GstBaseParseFrame * frame)
729 memset (frame, 0, sizeof (GstBaseParseFrame));
730 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
731 GST_TRACE ("inited frame %p", frame);
735 * gst_base_parse_frame_new:
736 * @buffer: (transfer none): a #GstBuffer
738 * @overhead: number of bytes in this frame which should be counted as
739 * metadata overhead, ie. not used to calculate the average bitrate.
740 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
742 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
743 * elements written in C should usually allocate the frame on the stack and
744 * then use gst_base_parse_frame_init() to initialise it.
746 * Returns: a newly-allocated #GstBaseParseFrame. Free with
747 * gst_base_parse_frame_free() when no longer needed.
750 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
753 GstBaseParseFrame *frame;
755 frame = g_slice_new0 (GstBaseParseFrame);
756 frame->buffer = gst_buffer_ref (buffer);
758 GST_TRACE ("created frame %p", frame);
763 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
766 gst_buffer_replace (&frame->buffer, buf);
770 /* set flags one by one for clarity */
771 if (G_UNLIKELY (parse->priv->drain))
772 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
774 /* losing sync is pretty much a discont (and vice versa), no ? */
775 if (G_UNLIKELY (parse->priv->discont))
776 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
780 gst_base_parse_reset (GstBaseParse * parse)
782 GST_OBJECT_LOCK (parse);
783 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
784 parse->priv->duration = -1;
785 parse->priv->min_frame_size = 1;
786 parse->priv->discont = TRUE;
787 parse->priv->flushing = FALSE;
788 parse->priv->saw_gaps = FALSE;
789 parse->priv->offset = 0;
790 parse->priv->sync_offset = 0;
791 parse->priv->update_interval = -1;
792 parse->priv->fps_num = parse->priv->fps_den = 0;
793 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
794 parse->priv->lead_in = parse->priv->lead_out = 0;
795 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
796 parse->priv->bitrate = 0;
797 parse->priv->framecount = 0;
798 parse->priv->bytecount = 0;
799 parse->priv->acc_duration = 0;
800 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
801 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
802 parse->priv->first_frame_offset = -1;
803 parse->priv->estimated_duration = -1;
804 parse->priv->estimated_drift = 0;
805 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
806 parse->priv->next_dts = 0;
807 parse->priv->syncable = TRUE;
808 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
809 parse->priv->passthrough = FALSE;
810 parse->priv->pts_interpolate = TRUE;
811 parse->priv->infer_ts = TRUE;
812 parse->priv->has_timing_info = FALSE;
813 parse->priv->post_min_bitrate = TRUE;
814 parse->priv->post_avg_bitrate = TRUE;
815 parse->priv->post_max_bitrate = TRUE;
816 parse->priv->min_bitrate = G_MAXUINT;
817 parse->priv->max_bitrate = 0;
818 parse->priv->avg_bitrate = 0;
819 parse->priv->posted_avg_bitrate = 0;
821 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
822 parse->priv->index_last_offset = -1;
823 parse->priv->index_last_valid = TRUE;
824 parse->priv->upstream_seekable = FALSE;
825 parse->priv->upstream_size = 0;
826 parse->priv->upstream_has_duration = FALSE;
827 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
828 parse->priv->idx_interval = 0;
829 parse->priv->idx_byte_interval = 0;
830 parse->priv->exact_position = TRUE;
831 parse->priv->seen_keyframe = FALSE;
832 parse->priv->checked_media = FALSE;
834 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
835 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
836 parse->priv->last_offset = 0;
838 parse->priv->skip = 0;
840 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
842 g_list_free (parse->priv->pending_events);
843 parse->priv->pending_events = NULL;
845 if (parse->priv->cache) {
846 gst_buffer_unref (parse->priv->cache);
847 parse->priv->cache = NULL;
850 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
851 g_slist_free (parse->priv->pending_seeks);
852 parse->priv->pending_seeks = NULL;
854 if (parse->priv->adapter)
855 gst_adapter_clear (parse->priv->adapter);
857 parse->priv->new_frame = TRUE;
859 parse->priv->first_buffer = TRUE;
861 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
862 g_list_free (parse->priv->detect_buffers);
863 parse->priv->detect_buffers = NULL;
864 parse->priv->detect_buffers_size = 0;
865 GST_OBJECT_UNLOCK (parse);
868 /* gst_base_parse_parse_frame:
869 * @parse: #GstBaseParse.
870 * @buffer: #GstBuffer.
872 * Default callback for parse_frame.
875 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
877 GstBuffer *buffer = frame->buffer;
879 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
880 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
881 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
883 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
884 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
885 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
887 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
888 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
889 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
894 /* gst_base_parse_convert:
895 * @parse: #GstBaseParse.
896 * @src_format: #GstFormat describing the source format.
897 * @src_value: Source value to be converted.
898 * @dest_format: #GstFormat defining the converted format.
899 * @dest_value: Pointer where the conversion result will be put.
901 * Converts using configured "convert" vmethod in #GstBaseParse class.
903 * Returns: %TRUE if conversion was successful.
906 gst_base_parse_convert (GstBaseParse * parse,
907 GstFormat src_format,
908 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
910 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
913 g_return_val_if_fail (dest_value != NULL, FALSE);
918 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
920 #ifndef GST_DISABLE_GST_DEBUG
923 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
924 GST_LOG_OBJECT (parse,
925 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
926 GST_TIME_ARGS (src_value), *dest_value);
927 } else if (dest_format == GST_FORMAT_TIME &&
928 src_format == GST_FORMAT_BYTES) {
929 GST_LOG_OBJECT (parse,
930 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
931 src_value, GST_TIME_ARGS (*dest_value));
933 GST_LOG_OBJECT (parse,
934 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
935 GST_STR_NULL (gst_format_get_name (src_format)),
936 GST_STR_NULL (gst_format_get_name (dest_format)),
937 src_value, *dest_value);
940 GST_DEBUG_OBJECT (parse, "conversion failed");
948 /* gst_base_parse_sink_event:
949 * @pad: #GstPad that received the event.
950 * @event: #GstEvent to be handled.
952 * Handler for sink pad events.
954 * Returns: %TRUE if the event was handled.
957 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
959 GstBaseParse *parse = GST_BASE_PARSE (parent);
960 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
963 ret = bclass->sink_event (parse, event);
969 /* gst_base_parse_sink_event_default:
970 * @parse: #GstBaseParse.
971 * @event: #GstEvent to be handled.
973 * Element-level event handler function.
975 * The event will be unreffed only if it has been handled and this
976 * function returns %TRUE
978 * Returns: %TRUE if the event was handled and not need forwarding.
981 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
983 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
984 gboolean ret = FALSE;
985 gboolean forward_immediate = FALSE;
987 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
988 GST_EVENT_TYPE_NAME (event));
990 switch (GST_EVENT_TYPE (event)) {
995 gst_event_parse_caps (event, &caps);
996 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
998 if (klass->set_sink_caps)
999 ret = klass->set_sink_caps (parse, caps);
1003 /* will send our own caps downstream */
1004 gst_event_unref (event);
1008 case GST_EVENT_SEGMENT:
1010 const GstSegment *in_segment;
1011 GstSegment out_segment;
1012 gint64 offset = 0, next_dts;
1013 guint32 seqnum = gst_event_get_seqnum (event);
1015 gst_event_parse_segment (event, &in_segment);
1016 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1017 out_segment.rate = in_segment->rate;
1018 out_segment.applied_rate = in_segment->applied_rate;
1020 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1022 parse->priv->upstream_format = in_segment->format;
1023 if (in_segment->format == GST_FORMAT_BYTES) {
1024 GstBaseParseSeek *seek = NULL;
1027 /* stop time is allowed to be open-ended, but not start & pos */
1028 offset = in_segment->time;
1030 GST_OBJECT_LOCK (parse);
1031 for (node = parse->priv->pending_seeks; node; node = node->next) {
1032 GstBaseParseSeek *tmp = node->data;
1034 if (tmp->offset == offset) {
1039 parse->priv->pending_seeks =
1040 g_slist_remove (parse->priv->pending_seeks, seek);
1041 GST_OBJECT_UNLOCK (parse);
1044 GST_DEBUG_OBJECT (parse,
1045 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1046 seek->accurate ? " accurate" : "", &seek->segment);
1048 out_segment.start = seek->segment.start;
1049 out_segment.stop = seek->segment.stop;
1050 out_segment.time = seek->segment.start;
1052 next_dts = seek->start_ts;
1053 parse->priv->exact_position = seek->accurate;
1056 /* best attempt convert */
1057 /* as these are only estimates, stop is kept open-ended to avoid
1058 * premature cutting */
1059 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1060 GST_FORMAT_TIME, (gint64 *) & next_dts);
1062 out_segment.start = next_dts;
1063 out_segment.stop = GST_CLOCK_TIME_NONE;
1064 out_segment.time = next_dts;
1066 parse->priv->exact_position = (in_segment->start == 0);
1069 gst_event_unref (event);
1071 event = gst_event_new_segment (&out_segment);
1072 gst_event_set_seqnum (event, seqnum);
1074 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1075 GST_SEGMENT_FORMAT, in_segment);
1077 } else if (in_segment->format != GST_FORMAT_TIME) {
1078 /* Unknown incoming segment format. Output a default open-ended
1080 gst_event_unref (event);
1082 out_segment.start = 0;
1083 out_segment.stop = GST_CLOCK_TIME_NONE;
1084 out_segment.time = 0;
1086 event = gst_event_new_segment (&out_segment);
1087 gst_event_set_seqnum (event, seqnum);
1091 /* not considered BYTE seekable if it is talking to us in TIME,
1092 * whatever else it might claim */
1093 parse->priv->upstream_seekable = FALSE;
1094 next_dts = in_segment->start;
1095 gst_event_copy_segment (event, &out_segment);
1098 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1101 gst_segment_set_newsegment (&parse->segment, update, rate,
1102 applied_rate, format, start, stop, start);
1107 /* save the segment for later, right before we push a new buffer so that
1108 * the caps are fixed and the next linked element can receive
1109 * the segment but finish the current segment */
1110 GST_DEBUG_OBJECT (parse, "draining current segment");
1111 if (in_segment->rate > 0.0)
1112 gst_base_parse_drain (parse);
1114 gst_base_parse_finish_fragment (parse, FALSE);
1115 gst_adapter_clear (parse->priv->adapter);
1117 parse->priv->offset = offset;
1118 parse->priv->sync_offset = offset;
1119 parse->priv->next_dts = next_dts;
1120 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1121 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1122 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1123 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1124 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1125 parse->priv->discont = TRUE;
1126 parse->priv->seen_keyframe = FALSE;
1127 parse->priv->skip = 0;
1131 case GST_EVENT_SEGMENT_DONE:
1132 /* need to drain now, rather than upon a new segment,
1133 * since that would have SEGMENT_DONE come before potential
1134 * delayed last part of the current segment */
1135 GST_DEBUG_OBJECT (parse, "draining current segment");
1136 if (parse->segment.rate > 0.0)
1137 gst_base_parse_drain (parse);
1139 gst_base_parse_finish_fragment (parse, FALSE);
1142 case GST_EVENT_FLUSH_START:
1143 GST_OBJECT_LOCK (parse);
1144 parse->priv->flushing = TRUE;
1145 GST_OBJECT_UNLOCK (parse);
1148 case GST_EVENT_FLUSH_STOP:
1149 gst_adapter_clear (parse->priv->adapter);
1150 gst_base_parse_clear_queues (parse);
1151 parse->priv->flushing = FALSE;
1152 parse->priv->discont = TRUE;
1153 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1154 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1155 parse->priv->new_frame = TRUE;
1156 parse->priv->skip = 0;
1158 forward_immediate = TRUE;
1162 if (parse->segment.rate > 0.0)
1163 gst_base_parse_drain (parse);
1165 gst_base_parse_finish_fragment (parse, TRUE);
1167 /* If we STILL have zero frames processed, fire an error */
1168 if (parse->priv->framecount == 0 && !parse->priv->saw_gaps) {
1169 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1170 ("No valid frames found before end of stream"), (NULL));
1172 /* newsegment and other serialized events before eos */
1173 gst_base_parse_push_pending_events (parse);
1175 if (!parse->priv->saw_gaps
1176 && parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1177 /* We've not posted bitrate tags yet - do so now */
1178 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1180 forward_immediate = TRUE;
1182 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1183 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1184 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1185 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1188 const GstStructure *s;
1189 gboolean ev_still_state;
1191 s = gst_event_get_structure (event);
1193 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1194 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1195 if (ev_still_state) {
1196 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1197 if (parse->segment.rate > 0.0)
1198 gst_base_parse_drain (parse);
1200 gst_base_parse_finish_fragment (parse, TRUE);
1202 forward_immediate = TRUE;
1208 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1210 gst_base_parse_push_pending_events (parse);
1212 if (parse->segment.rate > 0.0)
1213 gst_base_parse_drain (parse);
1215 gst_base_parse_finish_fragment (parse, TRUE);
1216 forward_immediate = TRUE;
1217 parse->priv->saw_gaps = TRUE;
1221 /* See if any bitrate tags were posted */
1222 gst_base_parse_handle_tag (parse, event);
1225 case GST_EVENT_STREAM_START:
1226 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1227 forward_immediate = TRUE;
1234 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1235 * For EOS this is required because no buffer or serialized event
1236 * will come after EOS and nothing could trigger another
1237 * _finish_frame() call. *
1238 * If the subclass handles sending of EOS manually it can return
1239 * _DROPPED from ::finish() and all other subclasses should have
1240 * decoded/flushed all remaining data before this
1242 * For FLUSH_STOP this is required because it is expected
1243 * to be forwarded immediately and no buffers are queued anyway.
1246 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1247 ret = gst_pad_push_event (parse->srcpad, event);
1249 parse->priv->pending_events =
1250 g_list_prepend (parse->priv->pending_events, event);
1255 GST_DEBUG_OBJECT (parse, "event handled");
1261 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1266 pad = GST_BASE_PARSE_SINK_PAD (parse);
1268 switch (GST_QUERY_TYPE (query)) {
1269 case GST_QUERY_CAPS:
1271 GstBaseParseClass *bclass;
1273 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1275 if (bclass->get_sink_caps) {
1276 GstCaps *caps, *filter;
1278 gst_query_parse_caps (query, &filter);
1279 caps = bclass->get_sink_caps (parse, filter);
1280 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1282 gst_query_set_caps_result (query, caps);
1283 gst_caps_unref (caps);
1287 GstCaps *caps, *template_caps, *filter;
1289 gst_query_parse_caps (query, &filter);
1290 template_caps = gst_pad_get_pad_template_caps (pad);
1291 if (filter != NULL) {
1293 gst_caps_intersect_full (filter, template_caps,
1294 GST_CAPS_INTERSECT_FIRST);
1295 gst_caps_unref (template_caps);
1297 caps = template_caps;
1299 gst_query_set_caps_result (query, caps);
1300 gst_caps_unref (caps);
1308 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1317 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1319 GstBaseParseClass *bclass;
1320 GstBaseParse *parse;
1323 parse = GST_BASE_PARSE (parent);
1324 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1326 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1328 if (bclass->sink_query)
1329 ret = bclass->sink_query (parse, query);
1333 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1334 GST_QUERY_TYPE_NAME (query), ret, query);
1340 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1342 GstBaseParseClass *bclass;
1343 GstBaseParse *parse;
1346 parse = GST_BASE_PARSE (parent);
1347 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1349 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1350 GST_QUERY_TYPE_NAME (query), query);
1352 if (bclass->src_query)
1353 ret = bclass->src_query (parse, query);
1357 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1358 GST_QUERY_TYPE_NAME (query), ret, query);
1363 /* gst_base_parse_src_event:
1364 * @pad: #GstPad that received the event.
1365 * @event: #GstEvent that was received.
1367 * Handler for source pad events.
1369 * Returns: %TRUE if the event was handled.
1372 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1374 GstBaseParse *parse;
1375 GstBaseParseClass *bclass;
1376 gboolean ret = TRUE;
1378 parse = GST_BASE_PARSE (parent);
1379 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1381 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1382 GST_EVENT_TYPE_NAME (event));
1384 if (bclass->src_event)
1385 ret = bclass->src_event (parse, event);
1387 gst_event_unref (event);
1393 gst_base_parse_is_seekable (GstBaseParse * parse)
1395 /* FIXME: could do more here, e.g. check index or just send data from 0
1396 * in pull mode and let decoder/sink clip */
1397 return parse->priv->syncable;
1400 /* gst_base_parse_src_event_default:
1401 * @parse: #GstBaseParse.
1402 * @event: #GstEvent that was received.
1404 * Default srcpad event handler.
1406 * Returns: %TRUE if the event was handled and can be dropped.
1409 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1411 gboolean res = FALSE;
1413 switch (GST_EVENT_TYPE (event)) {
1414 case GST_EVENT_SEEK:
1415 if (gst_base_parse_is_seekable (parse))
1416 res = gst_base_parse_handle_seek (parse, event);
1419 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1428 * gst_base_parse_convert_default:
1429 * @parse: #GstBaseParse.
1430 * @src_format: #GstFormat describing the source format.
1431 * @src_value: Source value to be converted.
1432 * @dest_format: #GstFormat defining the converted format.
1433 * @dest_value: Pointer where the conversion result will be put.
1435 * Default implementation of "convert" vmethod in #GstBaseParse class.
1437 * Returns: %TRUE if conversion was successful.
1440 gst_base_parse_convert_default (GstBaseParse * parse,
1441 GstFormat src_format,
1442 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1444 gboolean ret = FALSE;
1445 guint64 bytes, duration;
1447 if (G_UNLIKELY (src_format == dest_format)) {
1448 *dest_value = src_value;
1452 if (G_UNLIKELY (src_value == -1)) {
1457 if (G_UNLIKELY (src_value == 0)) {
1462 /* need at least some frames */
1463 if (!parse->priv->framecount)
1466 duration = parse->priv->acc_duration / GST_MSECOND;
1467 bytes = parse->priv->bytecount;
1469 if (G_UNLIKELY (!duration || !bytes))
1470 goto no_duration_bytes;
1472 if (src_format == GST_FORMAT_BYTES) {
1473 if (dest_format == GST_FORMAT_TIME) {
1474 /* BYTES -> TIME conversion */
1475 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1476 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1477 *dest_value *= GST_MSECOND;
1478 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1479 *dest_value / GST_MSECOND);
1482 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1484 } else if (src_format == GST_FORMAT_TIME) {
1485 if (dest_format == GST_FORMAT_BYTES) {
1486 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1487 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1489 GST_DEBUG_OBJECT (parse,
1490 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1491 src_value / GST_MSECOND, *dest_value);
1494 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1496 } else if (src_format == GST_FORMAT_DEFAULT) {
1497 /* DEFAULT == frame-based */
1498 if (dest_format == GST_FORMAT_TIME) {
1499 GST_DEBUG_OBJECT (parse, "converting default -> time");
1500 if (parse->priv->fps_den) {
1501 *dest_value = gst_util_uint64_scale (src_value,
1502 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1506 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1509 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1516 GST_DEBUG_OBJECT (parse, "no framecount");
1521 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1522 G_GUINT64_FORMAT, duration, bytes);
1529 gst_base_parse_update_duration (GstBaseParse * baseparse)
1532 GstBaseParse *parse;
1534 parse = GST_BASE_PARSE (baseparse);
1536 peer = gst_pad_get_peer (parse->sinkpad);
1538 gboolean qres = FALSE;
1539 gint64 ptot, dest_value;
1541 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1542 gst_object_unref (GST_OBJECT (peer));
1544 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1545 GST_FORMAT_TIME, &dest_value)) {
1547 /* inform if duration changed, but try to avoid spamming */
1548 parse->priv->estimated_drift +=
1549 dest_value - parse->priv->estimated_duration;
1551 parse->priv->estimated_duration = dest_value;
1552 GST_LOG_OBJECT (parse,
1553 "updated estimated duration to %" GST_TIME_FORMAT,
1554 GST_TIME_ARGS (dest_value));
1556 if (parse->priv->estimated_drift > GST_SECOND ||
1557 parse->priv->estimated_drift < -GST_SECOND) {
1558 gst_element_post_message (GST_ELEMENT (parse),
1559 gst_message_new_duration_changed (GST_OBJECT (parse)));
1560 parse->priv->estimated_drift = 0;
1568 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1569 gboolean post_avg, gboolean post_max)
1571 GstTagList *taglist = NULL;
1573 if (post_min && parse->priv->post_min_bitrate) {
1574 taglist = gst_tag_list_new_empty ();
1576 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1577 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1580 if (post_avg && parse->priv->post_avg_bitrate) {
1581 if (taglist == NULL)
1582 taglist = gst_tag_list_new_empty ();
1584 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1585 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1586 parse->priv->avg_bitrate, NULL);
1589 if (post_max && parse->priv->post_max_bitrate) {
1590 if (taglist == NULL)
1591 taglist = gst_tag_list_new_empty ();
1593 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1594 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1597 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1598 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1599 parse->priv->max_bitrate);
1601 if (taglist != NULL) {
1602 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1606 /* gst_base_parse_update_bitrates:
1607 * @parse: #GstBaseParse.
1608 * @buffer: Current frame as a #GstBuffer
1610 * Keeps track of the minimum and maximum bitrates, and also maintains a
1611 * running average bitrate of the stream so far.
1614 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1616 /* Only update the tag on a 10 kbps delta */
1617 static const gint update_threshold = 10000;
1619 guint64 data_len, frame_dur;
1620 gint overhead, frame_bitrate, old_avg_bitrate;
1621 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1622 GstBuffer *buffer = frame->buffer;
1624 overhead = frame->overhead;
1628 data_len = gst_buffer_get_size (buffer) - overhead;
1629 parse->priv->data_bytecount += data_len;
1631 /* duration should be valid by now,
1632 * either set by subclass or maybe based on fps settings */
1633 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1634 /* Calculate duration of a frame from buffer properties */
1635 frame_dur = GST_BUFFER_DURATION (buffer);
1636 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1637 parse->priv->acc_duration;
1640 /* No way to figure out frame duration (is this even possible?) */
1644 /* override if subclass provided bitrate, e.g. metadata based */
1645 if (parse->priv->bitrate) {
1646 parse->priv->avg_bitrate = parse->priv->bitrate;
1647 /* spread this (confirmed) info ASAP */
1648 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1649 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1653 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1657 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1658 parse->priv->avg_bitrate);
1660 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1662 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1663 /* always post all at threshold time */
1664 update_min = update_max = update_avg = TRUE;
1667 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1668 if (frame_bitrate < parse->priv->min_bitrate) {
1669 parse->priv->min_bitrate = frame_bitrate;
1673 if (frame_bitrate > parse->priv->max_bitrate) {
1674 parse->priv->max_bitrate = frame_bitrate;
1678 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1679 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1680 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1685 if ((update_min || update_avg || update_max))
1686 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1693 * gst_base_parse_add_index_entry:
1694 * @parse: #GstBaseParse.
1695 * @offset: offset of entry
1696 * @ts: timestamp associated with offset
1697 * @key: whether entry refers to keyframe
1698 * @force: add entry disregarding sanity checks
1700 * Adds an entry to the index associating @offset to @ts. It is recommended
1701 * to only add keyframe entries. @force allows to bypass checks, such as
1702 * whether the stream is (upstream) seekable, another entry is already "close"
1703 * to the new entry, etc.
1705 * Returns: #gboolean indicating whether entry was added
1708 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1709 GstClockTime ts, gboolean key, gboolean force)
1711 gboolean ret = FALSE;
1712 GstIndexAssociation associations[2];
1714 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1715 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1717 if (G_LIKELY (!force)) {
1719 if (!parse->priv->upstream_seekable) {
1720 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1724 /* FIXME need better helper data structure that handles these issues
1725 * related to ongoing collecting of index entries */
1726 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1728 GST_LOG_OBJECT (parse,
1729 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1730 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1734 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1735 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1736 parse->priv->idx_interval) {
1737 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1738 GST_TIME_ARGS (parse->priv->index_last_ts));
1742 /* if last is not really the last one */
1743 if (!parse->priv->index_last_valid) {
1744 GstClockTime prev_ts;
1746 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1747 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1748 GST_LOG_OBJECT (parse,
1749 "entry too close to existing entry %" GST_TIME_FORMAT,
1750 GST_TIME_ARGS (prev_ts));
1751 parse->priv->index_last_offset = offset;
1752 parse->priv->index_last_ts = ts;
1758 associations[0].format = GST_FORMAT_TIME;
1759 associations[0].value = ts;
1760 associations[1].format = GST_FORMAT_BYTES;
1761 associations[1].value = offset;
1763 /* index might change on-the-fly, although that would be nutty app ... */
1764 GST_BASE_PARSE_INDEX_LOCK (parse);
1765 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1766 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1767 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1768 (const GstIndexAssociation *) &associations);
1769 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1772 parse->priv->index_last_offset = offset;
1773 parse->priv->index_last_ts = ts;
1782 /* check for seekable upstream, above and beyond a mere query */
1784 gst_base_parse_check_seekability (GstBaseParse * parse)
1787 gboolean seekable = FALSE;
1788 gint64 start = -1, stop = -1;
1789 guint idx_interval = 0;
1790 guint64 idx_byte_interval = 0;
1792 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1793 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1794 GST_DEBUG_OBJECT (parse, "seeking query failed");
1798 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1800 /* try harder to query upstream size if we didn't get it the first time */
1801 if (seekable && stop == -1) {
1802 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1803 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1806 /* if upstream doesn't know the size, it's likely that it's not seekable in
1807 * practice even if it technically may be seekable */
1808 if (seekable && (start != 0 || stop <= start)) {
1809 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1813 /* let's not put every single frame into our index */
1815 if (stop < 10 * 1024 * 1024)
1817 else if (stop < 100 * 1024 * 1024)
1820 idx_interval = 1000;
1822 /* ensure that even for large files (e.g. very long audio files), the index
1823 * stays reasonably-size, with some arbitrary limit to the total number of
1825 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1826 GST_DEBUG_OBJECT (parse,
1827 "Limiting index entries to %d, indexing byte interval %"
1828 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1832 gst_query_unref (query);
1834 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1835 G_GUINT64_FORMAT ")", seekable, start, stop);
1836 parse->priv->upstream_seekable = seekable;
1837 parse->priv->upstream_size = seekable ? stop : 0;
1839 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1840 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1841 parse->priv->idx_byte_interval = idx_byte_interval;
1844 /* some misc checks on upstream */
1846 gst_base_parse_check_upstream (GstBaseParse * parse)
1850 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1851 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1852 /* upstream has one, accept it also, and no further updates */
1853 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1854 parse->priv->upstream_has_duration = TRUE;
1857 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1858 parse->priv->upstream_has_duration);
1861 /* checks src caps to determine if dealing with audio or video */
1862 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1864 gst_base_parse_check_media (GstBaseParse * parse)
1869 caps = gst_pad_get_current_caps (parse->srcpad);
1870 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1871 parse->priv->is_video =
1872 g_str_has_prefix (gst_structure_get_name (s), "video");
1874 /* historical default */
1875 parse->priv->is_video = FALSE;
1878 gst_caps_unref (caps);
1880 parse->priv->checked_media = TRUE;
1881 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1884 /* takes ownership of frame */
1886 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1888 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1889 /* frame allocated on the heap, we can just take ownership */
1890 g_queue_push_tail (&parse->priv->queued_frames, frame);
1891 GST_TRACE ("queued frame %p", frame);
1893 GstBaseParseFrame *copy;
1895 /* probably allocated on the stack, must make a proper copy */
1896 copy = gst_base_parse_frame_copy (frame);
1897 g_queue_push_tail (&parse->priv->queued_frames, copy);
1898 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1899 gst_base_parse_frame_free (frame);
1903 /* makes sure that @buf is properly prepared and decorated for passing
1904 * to baseclass, and an equally setup frame is returned setup with @buf.
1905 * Takes ownership of @buf. */
1906 static GstBaseParseFrame *
1907 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1909 GstBaseParseFrame *frame = NULL;
1911 buffer = gst_buffer_make_writable (buffer);
1913 GST_LOG_OBJECT (parse,
1914 "preparing frame at offset %" G_GUINT64_FORMAT
1915 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1916 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1917 gst_buffer_get_size (buffer));
1919 if (parse->priv->discont) {
1920 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1921 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1922 parse->priv->discont = FALSE;
1925 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1927 frame = gst_base_parse_frame_new (buffer, 0, 0);
1929 /* also ensure to update state flags */
1930 gst_base_parse_frame_update (parse, frame, buffer);
1931 gst_buffer_unref (buffer);
1933 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1934 GST_LOG_OBJECT (parse, "marking as new frame");
1935 parse->priv->new_frame = FALSE;
1936 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1939 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1941 /* use default handler to provide initial (upstream) metadata */
1942 gst_base_parse_parse_frame (parse, frame);
1947 /* Wraps buffer in a frame and dispatches to subclass.
1948 * Also manages data skipping and offset handling (including adapter flushing).
1949 * Takes ownership of @buffer */
1950 static GstFlowReturn
1951 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1952 gint * skip, gint * flushed)
1954 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1955 GstBaseParseFrame *frame;
1958 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1960 GST_LOG_OBJECT (parse,
1961 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1962 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1963 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1964 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1965 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1967 /* track what is being flushed during this single round of frame processing */
1968 parse->priv->flushed = 0;
1971 /* make it easy for _finish_frame to pick up input data */
1972 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1973 gst_buffer_ref (buffer);
1974 gst_adapter_push (parse->priv->adapter, buffer);
1977 frame = gst_base_parse_prepare_frame (parse, buffer);
1978 ret = klass->handle_frame (parse, frame, skip);
1980 *flushed = parse->priv->flushed;
1982 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1985 /* subclass can only do one of these, or semantics are too unclear */
1986 g_assert (*skip == 0 || *flushed == 0);
1988 /* track skipping */
1990 GstClockTime pts, dts;
1993 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1994 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1995 /* reverse playback, and no frames found yet, so we are skipping
1996 * the leading part of a fragment, which may form the tail of
1997 * fragment coming later, hopefully subclass skips efficiently ... */
1998 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1999 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2000 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
2001 outbuf = gst_buffer_make_writable (outbuf);
2002 GST_BUFFER_PTS (outbuf) = pts;
2003 GST_BUFFER_DTS (outbuf) = dts;
2004 parse->priv->buffers_head =
2005 g_slist_prepend (parse->priv->buffers_head, outbuf);
2008 /* If we're asked to skip more than is available in the adapter,
2009 we need to remember what we need to skip for next iteration */
2010 gsize av = gst_adapter_available (parse->priv->adapter);
2011 GST_DEBUG ("Asked to skip %u (%" G_GSIZE_FORMAT " available)", *skip, av);
2013 gst_adapter_flush (parse->priv->adapter, *skip);
2016 ("This is more than available, flushing %" G_GSIZE_FORMAT
2017 ", storing %u to skip", av, (guint) (*skip - av));
2018 parse->priv->skip = *skip - av;
2019 gst_adapter_flush (parse->priv->adapter, av);
2023 if (!parse->priv->discont)
2024 parse->priv->sync_offset = parse->priv->offset;
2025 parse->priv->offset += *skip;
2026 parse->priv->discont = TRUE;
2027 /* check for indefinite skipping */
2028 if (ret == GST_FLOW_OK)
2029 ret = gst_base_parse_check_sync (parse);
2032 parse->priv->offset += *flushed;
2034 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2035 gst_adapter_clear (parse->priv->adapter);
2038 gst_base_parse_frame_free (frame);
2043 /* gst_base_parse_push_pending_events:
2044 * @parse: #GstBaseParse
2046 * Pushes the pending events
2049 gst_base_parse_push_pending_events (GstBaseParse * parse)
2051 if (G_UNLIKELY (parse->priv->pending_events)) {
2052 GList *r = g_list_reverse (parse->priv->pending_events);
2055 parse->priv->pending_events = NULL;
2056 for (l = r; l != NULL; l = l->next) {
2057 gst_pad_push_event (parse->srcpad, GST_EVENT_CAST (l->data));
2063 /* gst_base_parse_handle_and_push_frame:
2064 * @parse: #GstBaseParse.
2065 * @klass: #GstBaseParseClass.
2066 * @frame: (transfer full): a #GstBaseParseFrame
2068 * Parses the frame from given buffer and pushes it forward. Also performs
2069 * timestamp handling and checks the segment limits.
2071 * This is called with srcpad STREAM_LOCK held.
2073 * Returns: #GstFlowReturn
2075 static GstFlowReturn
2076 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2077 GstBaseParseFrame * frame)
2082 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2084 buffer = frame->buffer;
2085 offset = frame->offset;
2087 /* check if subclass/format can provide ts.
2088 * If so, that allows and enables extra seek and duration determining options */
2089 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2090 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2091 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2092 parse->priv->first_frame_offset = offset;
2093 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2094 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2095 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2096 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2097 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2098 GST_TIME_ARGS (parse->priv->first_frame_pts),
2099 parse->priv->first_frame_offset);
2100 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2102 GstClockTime last_ts = G_MAXINT64;
2104 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2105 gst_base_parse_locate_time (parse, &last_ts, &off);
2106 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2107 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2110 /* disable further checks */
2111 parse->priv->first_frame_offset = 0;
2115 /* track upstream time if provided, not subclass' internal notion of it */
2116 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2117 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2118 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2121 /* interpolating and no valid pts yet,
2122 * start with dts and carry on from there */
2123 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2124 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2125 parse->priv->next_pts = parse->priv->next_dts;
2127 /* again use default handler to add missing metadata;
2128 * we may have new information on frame properties */
2129 gst_base_parse_parse_frame (parse, frame);
2131 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2132 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2133 parse->priv->next_dts =
2134 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2135 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2136 GstClockTime next_pts =
2137 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2138 if (next_pts >= parse->priv->next_dts)
2139 parse->priv->next_pts = next_pts;
2142 /* we lost track, do not produce bogus time next time around
2143 * (probably means parser subclass has given up on parsing as well) */
2144 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2145 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2148 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2149 GST_BUFFER_PTS_IS_VALID (buffer))
2150 gst_base_parse_add_index_entry (parse, offset,
2151 GST_BUFFER_PTS (buffer),
2152 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2154 /* All OK, push queued frames if there are any */
2155 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2156 GstBaseParseFrame *queued_frame;
2158 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2159 gst_base_parse_push_frame (parse, queued_frame);
2160 gst_base_parse_frame_free (queued_frame);
2164 return gst_base_parse_push_frame (parse, frame);
2168 * gst_base_parse_push_frame:
2169 * @parse: #GstBaseParse.
2170 * @frame: (transfer none): a #GstBaseParseFrame
2172 * Pushes the frame's buffer downstream, sends any pending events and
2173 * does some timestamp and segment handling. Takes ownership of
2174 * frame's buffer, though caller retains ownership of @frame.
2176 * This must be called with sinkpad STREAM_LOCK held.
2178 * Returns: #GstFlowReturn
2181 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2183 GstFlowReturn ret = GST_FLOW_OK;
2184 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2185 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2186 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2190 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2191 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2193 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2195 buffer = frame->buffer;
2197 GST_LOG_OBJECT (parse,
2198 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2199 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2200 gst_buffer_get_size (buffer),
2201 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2202 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2203 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2206 parse->priv->bytecount += frame->size;
2207 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2208 parse->priv->framecount++;
2209 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2210 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2213 /* 0 means disabled */
2214 if (parse->priv->update_interval < 0)
2215 parse->priv->update_interval = 50;
2216 else if (parse->priv->update_interval > 0 &&
2217 (parse->priv->framecount % parse->priv->update_interval) == 0)
2218 gst_base_parse_update_duration (parse);
2220 if (GST_BUFFER_PTS_IS_VALID (buffer))
2221 last_start = last_stop = GST_BUFFER_PTS (buffer);
2222 if (last_start != GST_CLOCK_TIME_NONE
2223 && GST_BUFFER_DURATION_IS_VALID (buffer))
2224 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2226 /* should have caps by now */
2227 if (!gst_pad_has_current_caps (parse->srcpad))
2230 if (G_UNLIKELY (!parse->priv->checked_media)) {
2231 /* have caps; check identity */
2232 gst_base_parse_check_media (parse);
2235 /* Push pending events, including SEGMENT events */
2236 gst_base_parse_push_pending_events (parse);
2238 /* segment adjustment magic; only if we are running the whole show */
2239 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2240 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2241 parse->priv->upstream_seekable)) {
2243 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2244 GST_CLOCK_TIME_IS_VALID (last_start)) {
2245 GstClockTimeDiff diff;
2247 /* only send newsegments with increasing start times,
2248 * otherwise if these go back and forth downstream (sinks) increase
2249 * accumulated time and running_time */
2250 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2251 if (G_UNLIKELY (diff > 2 * GST_SECOND
2252 && last_start > parse->segment.start
2253 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2254 || last_start < parse->segment.stop))) {
2256 GST_DEBUG_OBJECT (parse,
2257 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2258 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2259 "Sending updated SEGMENT events", diff,
2260 GST_TIME_ARGS (parse->segment.position),
2261 GST_TIME_ARGS (last_start));
2263 /* skip gap FIXME */
2264 gst_pad_push_event (parse->srcpad,
2265 gst_event_new_segment (&parse->segment));
2267 parse->segment.position = last_start;
2272 /* update bitrates and optionally post corresponding tags
2273 * (following newsegment) */
2274 gst_base_parse_update_bitrates (parse, frame);
2276 if (klass->pre_push_frame) {
2277 ret = klass->pre_push_frame (parse, frame);
2279 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2282 /* take final ownership of frame buffer */
2283 if (frame->out_buffer) {
2284 buffer = frame->out_buffer;
2285 frame->out_buffer = NULL;
2286 gst_buffer_replace (&frame->buffer, NULL);
2288 buffer = frame->buffer;
2289 frame->buffer = NULL;
2292 /* subclass must play nice */
2293 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2295 size = gst_buffer_get_size (buffer);
2297 parse->priv->seen_keyframe |= parse->priv->is_video &&
2298 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2300 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2301 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2302 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2303 GST_BUFFER_TIMESTAMP (buffer) >
2304 parse->segment.stop + parse->priv->lead_out_ts) {
2305 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2307 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2308 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2309 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2310 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2311 parse->priv->lead_in_ts < parse->segment.start) {
2312 if (parse->priv->seen_keyframe) {
2313 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2316 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2317 ret = GST_BASE_PARSE_FLOW_DROPPED;
2324 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2325 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2326 gst_buffer_unref (buffer);
2328 } else if (ret == GST_FLOW_OK) {
2329 if (parse->segment.rate > 0.0) {
2330 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2332 ret = gst_pad_push (parse->srcpad, buffer);
2333 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2334 } else if (!parse->priv->disable_passthrough && parse->priv->passthrough) {
2336 /* in backwards playback mode, if on passthrough we need to push buffers
2337 * directly without accumulating them into the buffers_queued as baseparse
2338 * will never check for a DISCONT while on passthrough and those buffers
2339 * will never be pushed.
2341 * also, as we are on reverse playback, it might be possible that
2342 * passthrough might have just been enabled, so make sure to drain the
2343 * buffers_queued list */
2344 if (G_UNLIKELY (parse->priv->buffers_queued != NULL)) {
2345 gst_base_parse_finish_fragment (parse, TRUE);
2346 ret = gst_base_parse_send_buffers (parse);
2349 if (ret == GST_FLOW_OK) {
2350 GST_LOG_OBJECT (parse,
2351 "pushing frame (%" G_GSIZE_FORMAT " bytes) now..", size);
2352 ret = gst_pad_push (parse->srcpad, buffer);
2353 GST_LOG_OBJECT (parse, "frame pushed, flow %s",
2354 gst_flow_get_name (ret));
2356 GST_LOG_OBJECT (parse,
2357 "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s", size,
2358 gst_flow_get_name (ret));
2359 gst_buffer_unref (buffer);
2363 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2365 parse->priv->buffers_queued =
2366 g_slist_prepend (parse->priv->buffers_queued, buffer);
2370 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2371 size, gst_flow_get_name (ret));
2372 gst_buffer_unref (buffer);
2373 /* if we are not sufficiently in control, let upstream decide on EOS */
2374 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2375 (parse->priv->passthrough ||
2376 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2377 !parse->priv->upstream_seekable)))
2381 /* Update current running segment position */
2382 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2383 parse->segment.position < last_stop)
2384 parse->segment.position = last_stop;
2391 if (GST_PAD_IS_FLUSHING (parse->srcpad))
2392 return GST_FLOW_FLUSHING;
2394 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2395 return GST_FLOW_ERROR;
2400 * gst_base_parse_finish_frame:
2401 * @parse: a #GstBaseParse
2402 * @frame: a #GstBaseParseFrame
2403 * @size: consumed input data represented by frame
2405 * Collects parsed data and pushes this downstream.
2406 * Source pad caps must be set when this is called.
2408 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2409 * Otherwise, @size samples will be taken from the input and used for output,
2410 * and the output's metadata (timestamps etc) will be taken as (optionally)
2411 * set by the subclass on @frame's (input) buffer (which is otherwise
2412 * ignored for any but the above purpose/information).
2414 * Note that the latter buffer is invalidated by this call, whereas the
2415 * caller retains ownership of @frame.
2417 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2420 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2423 GstFlowReturn ret = GST_FLOW_OK;
2425 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2426 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2427 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2428 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2431 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2432 "flushing size %d", frame->offset, size);
2434 /* some one-time start-up */
2435 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2436 gst_base_parse_check_seekability (parse);
2437 gst_base_parse_check_upstream (parse);
2440 parse->priv->flushed += size;
2442 if (parse->priv->scanning && frame->buffer) {
2443 if (!parse->priv->scanned_frame) {
2444 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2449 /* either PUSH or PULL mode arranges for adapter data */
2450 /* ensure output buffer */
2451 if (!frame->out_buffer) {
2452 GstBuffer *src, *dest;
2454 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2455 dest = frame->out_buffer;
2456 src = frame->buffer;
2457 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2458 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2459 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2460 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2461 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2462 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2464 gst_adapter_flush (parse->priv->adapter, size);
2467 /* use as input for subsequent processing */
2468 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2469 gst_buffer_unref (frame->out_buffer);
2470 frame->out_buffer = NULL;
2472 /* mark input size consumed */
2475 /* subclass might queue frames/data internally if it needs more
2476 * frames to decide on the format, or might request us to queue here. */
2477 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2478 gst_buffer_replace (&frame->buffer, NULL);
2480 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2481 GstBaseParseFrame *copy;
2483 copy = gst_base_parse_frame_copy (frame);
2484 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2485 gst_base_parse_queue_frame (parse, copy);
2489 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2495 /* gst_base_parse_drain:
2497 * Drains the adapter until it is empty. It decreases the min_frame_size to
2498 * match the current adapter size and calls chain method until the adapter
2499 * is emptied or chain returns with error.
2502 gst_base_parse_drain (GstBaseParse * parse)
2506 GST_DEBUG_OBJECT (parse, "draining");
2507 parse->priv->drain = TRUE;
2510 avail = gst_adapter_available (parse->priv->adapter);
2514 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2515 NULL) != GST_FLOW_OK) {
2519 /* nothing changed, maybe due to truncated frame; break infinite loop */
2520 if (avail == gst_adapter_available (parse->priv->adapter)) {
2521 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2522 gst_adapter_clear (parse->priv->adapter);
2526 parse->priv->drain = FALSE;
2529 /* gst_base_parse_send_buffers
2531 * Sends buffers collected in send_buffers downstream, and ensures that list
2532 * is empty at the end (errors or not).
2534 static GstFlowReturn
2535 gst_base_parse_send_buffers (GstBaseParse * parse)
2537 GSList *send = NULL;
2539 GstFlowReturn ret = GST_FLOW_OK;
2540 gboolean first = TRUE;
2542 send = parse->priv->buffers_send;
2546 buf = GST_BUFFER_CAST (send->data);
2547 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2548 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2549 ", offset %" G_GINT64_FORMAT, buf,
2550 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2551 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2552 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2554 /* Make sure the first buffer is always DISCONT. If we split
2555 * GOPs inside the parser this is otherwise not guaranteed */
2557 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
2561 /* iterate output queue an push downstream */
2562 ret = gst_pad_push (parse->srcpad, buf);
2563 send = g_slist_delete_link (send, send);
2565 /* clear any leftover if error */
2566 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2568 buf = GST_BUFFER_CAST (send->data);
2569 gst_buffer_unref (buf);
2570 send = g_slist_delete_link (send, send);
2575 parse->priv->buffers_send = send;
2580 /* gst_base_parse_start_fragment:
2582 * Prepares for processing a reverse playback (forward) fragment
2583 * by (re)setting proper state variables.
2585 static GstFlowReturn
2586 gst_base_parse_start_fragment (GstBaseParse * parse)
2588 GST_LOG_OBJECT (parse, "starting fragment");
2590 /* invalidate so no fall-back timestamping is performed;
2591 * ok if taken from subclass or upstream */
2592 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2593 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2594 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2595 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2596 /* prevent it hanging around stop all the time */
2597 parse->segment.position = GST_CLOCK_TIME_NONE;
2599 parse->priv->discont = TRUE;
2601 /* head of previous fragment is now pending tail of current fragment */
2602 parse->priv->buffers_pending = parse->priv->buffers_head;
2603 parse->priv->buffers_head = NULL;
2609 /* gst_base_parse_finish_fragment:
2611 * Processes a reverse playback (forward) fragment:
2612 * - append head of last fragment that was skipped to current fragment data
2613 * - drain the resulting current fragment data (i.e. repeated chain)
2614 * - add time/duration (if needed) to frames queued by chain
2615 * - push queued data
2617 static GstFlowReturn
2618 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2621 GstFlowReturn ret = GST_FLOW_OK;
2622 gboolean seen_key = FALSE, seen_delta = FALSE;
2624 GST_LOG_OBJECT (parse, "finishing fragment");
2627 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2628 while (parse->priv->buffers_pending) {
2629 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2631 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2632 gst_buffer_get_size (buf));
2633 gst_adapter_push (parse->priv->adapter, buf);
2635 GST_LOG_OBJECT (parse, "discarding head buffer");
2636 gst_buffer_unref (buf);
2638 parse->priv->buffers_pending =
2639 g_slist_delete_link (parse->priv->buffers_pending,
2640 parse->priv->buffers_pending);
2643 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2644 /* initial skipped data is added to buffers_pending */
2645 gst_base_parse_drain (parse);
2647 if (parse->priv->buffers_send) {
2648 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2649 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2652 /* add metadata (if needed to queued buffers */
2653 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2654 GST_TIME_ARGS (parse->priv->last_pts));
2655 while (parse->priv->buffers_queued) {
2656 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2658 /* no touching if upstream or parsing provided time */
2659 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2660 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2661 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2662 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2663 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2664 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2665 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2667 parse->priv->last_pts = 0;
2668 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2669 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2670 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2672 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2673 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2674 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2676 parse->priv->last_dts = 0;
2677 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2678 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2679 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2682 /* no idea, very bad */
2683 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2686 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2687 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2689 /* reverse order for ascending sending */
2690 /* send downstream at keyframe not preceded by a keyframe
2691 * (e.g. that should identify start of collection of IDR nals) */
2692 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2694 ret = gst_base_parse_send_buffers (parse);
2695 /* if a problem, throw all to sending */
2696 if (ret != GST_FLOW_OK) {
2697 parse->priv->buffers_send =
2698 g_slist_reverse (parse->priv->buffers_queued);
2699 parse->priv->buffers_queued = NULL;
2709 parse->priv->buffers_send =
2710 g_slist_prepend (parse->priv->buffers_send, buf);
2711 parse->priv->buffers_queued =
2712 g_slist_delete_link (parse->priv->buffers_queued,
2713 parse->priv->buffers_queued);
2716 /* audio may have all marked as keyframe, so arrange to send here. Also
2717 * we might have ended the loop above on a keyframe, in which case we
2719 if (!seen_delta || seen_key)
2720 ret = gst_base_parse_send_buffers (parse);
2722 /* any trailing unused no longer usable (ideally none) */
2723 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2724 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2725 gst_adapter_available (parse->priv->adapter));
2726 gst_adapter_clear (parse->priv->adapter);
2732 /* small helper that checks whether we have been trying to resync too long */
2733 static inline GstFlowReturn
2734 gst_base_parse_check_sync (GstBaseParse * parse)
2736 if (G_UNLIKELY (parse->priv->discont &&
2737 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2738 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2739 ("Failed to parse stream"), (NULL));
2740 return GST_FLOW_ERROR;
2746 static GstFlowReturn
2747 gst_base_parse_process_streamheader (GstBaseParse * parse)
2751 const GValue *value;
2752 GstFlowReturn ret = GST_FLOW_OK;
2754 caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (parse));
2758 str = gst_caps_get_structure (caps, 0);
2759 value = gst_structure_get_value (str, "streamheader");
2763 GST_DEBUG_OBJECT (parse, "Found streamheader field on input caps");
2765 if (GST_VALUE_HOLDS_ARRAY (value)) {
2767 gsize len = gst_value_array_get_size (value);
2769 for (i = 0; i < len; i++) {
2771 gst_value_get_buffer (gst_value_array_get_value (value, i));
2773 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2774 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2777 } else if (GST_VALUE_HOLDS_BUFFER (value)) {
2778 GstBuffer *buffer = gst_value_get_buffer (value);
2780 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2781 GST_OBJECT_CAST (parse), gst_buffer_ref (buffer));
2784 gst_caps_unref (caps);
2791 gst_caps_unref (caps);
2794 GST_DEBUG_OBJECT (parse, "No streamheader on caps");
2799 static GstFlowReturn
2800 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2802 GstBaseParseClass *bclass;
2803 GstBaseParse *parse;
2804 GstFlowReturn ret = GST_FLOW_OK;
2805 GstFlowReturn old_ret = GST_FLOW_OK;
2806 GstBuffer *tmpbuf = NULL;
2811 GstClockTime pts, dts;
2813 parse = GST_BASE_PARSE (parent);
2814 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2815 GST_DEBUG_OBJECT (parent, "chain");
2817 /* early out for speed, if we need to skip */
2818 if (buffer && GST_BUFFER_IS_DISCONT (buffer))
2819 parse->priv->skip = 0;
2820 if (parse->priv->skip > 0) {
2821 gsize bsize = gst_buffer_get_size (buffer);
2822 GST_DEBUG ("Got %" G_GSIZE_FORMAT " buffer, need to skip %u", bsize,
2824 if (parse->priv->skip >= bsize) {
2825 parse->priv->skip -= bsize;
2826 GST_DEBUG ("All the buffer is skipped");
2827 parse->priv->offset += bsize;
2828 parse->priv->sync_offset = parse->priv->offset;
2831 buffer = gst_buffer_make_writable (buffer);
2832 gst_buffer_resize (buffer, parse->priv->skip, bsize - parse->priv->skip);
2833 parse->priv->offset += parse->priv->skip;
2834 GST_DEBUG ("Done skipping, we have %u left on this buffer",
2835 (unsigned) (bsize - parse->priv->skip));
2836 parse->priv->skip = 0;
2837 parse->priv->discont = TRUE;
2840 if (G_UNLIKELY (parse->priv->first_buffer)) {
2841 parse->priv->first_buffer = FALSE;
2842 if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_HEADER)) {
2843 /* this stream has no header buffers, check if we just prepend the
2844 * streamheader from caps to the stream */
2845 GST_DEBUG_OBJECT (parse, "Looking for streamheader field on caps to "
2846 "prepend to the stream");
2847 gst_base_parse_process_streamheader (parse);
2849 GST_DEBUG_OBJECT (parse, "Stream has header buffers, not prepending "
2850 "streamheader from caps");
2854 if (parse->priv->detecting) {
2855 GstBuffer *detect_buf;
2857 if (parse->priv->detect_buffers_size == 0) {
2858 detect_buf = gst_buffer_ref (buffer);
2863 detect_buf = gst_buffer_new ();
2865 for (l = parse->priv->detect_buffers; l; l = l->next) {
2866 gsize tmpsize = gst_buffer_get_size (l->data);
2868 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2869 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2873 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2874 offset, gst_buffer_get_size (buffer));
2877 ret = bclass->detect (parse, detect_buf);
2878 gst_buffer_unref (detect_buf);
2880 if (ret == GST_FLOW_OK) {
2883 /* Detected something */
2884 parse->priv->detecting = FALSE;
2886 for (l = parse->priv->detect_buffers; l; l = l->next) {
2887 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2889 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2890 parent, GST_BUFFER_CAST (l->data));
2892 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2894 g_list_free (parse->priv->detect_buffers);
2895 parse->priv->detect_buffers = NULL;
2896 parse->priv->detect_buffers_size = 0;
2898 if (ret != GST_FLOW_OK) {
2902 /* Handle the current buffer */
2903 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2904 /* Still detecting, append buffer or error out if draining */
2906 if (parse->priv->drain) {
2907 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2908 return GST_FLOW_ERROR;
2909 } else if (parse->priv->flushing) {
2910 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2912 g_list_free (parse->priv->detect_buffers);
2913 parse->priv->detect_buffers = NULL;
2914 parse->priv->detect_buffers_size = 0;
2916 parse->priv->detect_buffers =
2917 g_list_append (parse->priv->detect_buffers, buffer);
2918 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2922 /* Something went wrong, subclass responsible for error reporting */
2926 /* And now handle the current buffer if detection worked */
2929 if (G_LIKELY (buffer)) {
2930 GST_LOG_OBJECT (parse,
2931 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2932 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2933 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2934 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2935 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2937 if (G_UNLIKELY (!parse->priv->disable_passthrough
2938 && parse->priv->passthrough)) {
2939 GstBaseParseFrame frame;
2941 gst_base_parse_frame_init (&frame);
2942 frame.buffer = gst_buffer_make_writable (buffer);
2943 ret = gst_base_parse_push_frame (parse, &frame);
2944 gst_base_parse_frame_free (&frame);
2947 /* upstream feeding us in reverse playback;
2948 * finish previous fragment and start new upon DISCONT */
2949 if (parse->segment.rate < 0.0) {
2950 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2951 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2952 ret = gst_base_parse_finish_fragment (parse, TRUE);
2953 gst_base_parse_start_fragment (parse);
2956 gst_adapter_push (parse->priv->adapter, buffer);
2959 /* Parse and push as many frames as possible */
2960 /* Stop either when adapter is empty or we are flushing */
2961 while (!parse->priv->flushing) {
2964 /* note: if subclass indicates MAX fsize,
2965 * this will not likely be available anyway ... */
2966 min_size = MAX (parse->priv->min_frame_size, fsize);
2967 av = gst_adapter_available (parse->priv->adapter);
2969 if (G_UNLIKELY (parse->priv->drain)) {
2971 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2972 if (G_UNLIKELY (!min_size)) {
2977 /* Collect at least min_frame_size bytes */
2978 if (av < min_size) {
2979 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2983 /* move along with upstream timestamp (if any),
2984 * but interpolate in between */
2985 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2986 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2987 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2988 parse->priv->prev_pts = parse->priv->next_pts = pts;
2990 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2991 parse->priv->prev_dts = parse->priv->next_dts = dts;
2993 /* we can mess with, erm interpolate, timestamps,
2994 * and incoming stuff has PTS but no DTS seen so far,
2995 * then pick up DTS from PTS and hope for the best ... */
2996 if (parse->priv->infer_ts &&
2997 parse->priv->pts_interpolate &&
2998 !GST_CLOCK_TIME_IS_VALID (dts) &&
2999 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
3000 GST_CLOCK_TIME_IS_VALID (pts))
3001 parse->priv->next_dts = pts;
3003 /* always pass all available data */
3004 data = gst_adapter_map (parse->priv->adapter, av);
3005 /* arrange for actual data to be copied if subclass tries to,
3006 * since what is passed is tied to the adapter */
3007 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
3008 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
3010 /* already inform subclass what timestamps we have planned,
3011 * at least if provided by time-based upstream */
3012 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
3013 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
3014 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
3017 /* keep the adapter mapped, so keep track of what has to be flushed */
3018 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
3021 /* probably already implicitly unmapped due to adapter operation,
3022 * but for good measure ... */
3023 gst_adapter_unmap (parse->priv->adapter);
3024 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
3027 if (skip == 0 && flush == 0) {
3028 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
3029 "breaking to get more data");
3030 /* ignore this return as it produced no data */
3038 GST_LOG_OBJECT (parse, "chain leaving");
3042 /* pull @size bytes at current offset,
3043 * i.e. at least try to and possibly return a shorter buffer if near the end */
3044 static GstFlowReturn
3045 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
3046 GstBuffer ** buffer)
3048 GstFlowReturn ret = GST_FLOW_OK;
3050 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
3052 /* Caching here actually makes much less difference than one would expect.
3053 * We do it mainly to avoid pulling buffers of 1 byte all the time */
3054 if (parse->priv->cache) {
3055 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
3056 gint cache_size = gst_buffer_get_size (parse->priv->cache);
3058 if (cache_offset <= parse->priv->offset &&
3059 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
3060 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
3061 parse->priv->offset - cache_offset, size);
3062 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3065 /* not enough data in the cache, free cache and get a new one */
3066 gst_buffer_unref (parse->priv->cache);
3067 parse->priv->cache = NULL;
3070 /* refill the cache */
3072 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
3073 64 * 1024), &parse->priv->cache);
3074 if (ret != GST_FLOW_OK) {
3075 parse->priv->cache = NULL;
3079 if (gst_buffer_get_size (parse->priv->cache) >= size) {
3081 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
3083 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3087 /* Not possible to get enough data, try a last time with
3088 * requesting exactly the size we need */
3089 gst_buffer_unref (parse->priv->cache);
3090 parse->priv->cache = NULL;
3092 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
3093 &parse->priv->cache);
3095 if (ret != GST_FLOW_OK) {
3096 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
3101 if (gst_buffer_get_size (parse->priv->cache) < size) {
3102 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
3103 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
3104 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
3106 *buffer = parse->priv->cache;
3107 parse->priv->cache = NULL;
3113 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
3114 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
3119 static GstFlowReturn
3120 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
3123 GstClockTime ts = 0;
3127 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
3128 ", last_offset = %" G_GINT64_FORMAT,
3129 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
3131 if (!parse->priv->last_offset
3132 || parse->priv->last_pts <= parse->segment.start) {
3133 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
3134 GST_TIME_ARGS (parse->segment.start));
3139 /* last fragment started at last_offset / last_ts;
3140 * seek back 10s capped at 1MB */
3141 if (parse->priv->last_pts >= 10 * GST_SECOND)
3142 ts = parse->priv->last_pts - 10 * GST_SECOND;
3143 /* if we are exact now, we will be more so going backwards */
3144 if (parse->priv->exact_position) {
3145 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
3147 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
3148 GST_FORMAT_BYTES, &offset)) {
3149 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
3152 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
3153 parse->priv->last_offset - 1024);
3154 offset = MAX (0, offset);
3156 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
3158 parse->priv->offset = offset;
3160 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
3162 if (ret != GST_FLOW_OK)
3165 /* offset will increase again as fragment is processed/parsed */
3166 parse->priv->last_offset = offset;
3168 gst_base_parse_start_fragment (parse);
3169 gst_adapter_push (parse->priv->adapter, buffer);
3170 ret = gst_base_parse_finish_fragment (parse, TRUE);
3171 if (ret != GST_FLOW_OK)
3174 /* force previous fragment */
3175 parse->priv->offset = -1;
3182 * pull and scan for next frame starting from current offset
3183 * ajusts sync, drain and offset going along */
3184 static GstFlowReturn
3185 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3188 GstFlowReturn ret = GST_FLOW_OK;
3189 guint fsize, min_size;
3193 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3194 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3196 /* let's make this efficient for all subclass once and for all;
3197 * maybe it does not need this much, but in the latter case, we know we are
3198 * in pull mode here and might as well try to read and supply more anyway
3199 * (so does the buffer caching mechanism) */
3203 min_size = MAX (parse->priv->min_frame_size, fsize);
3205 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3207 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3208 if (ret != GST_FLOW_OK)
3211 /* if we got a short read, inform subclass we are draining leftover
3212 * and no more is to be expected */
3213 if (gst_buffer_get_size (buffer) < min_size) {
3214 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3215 parse->priv->drain = TRUE;
3218 if (parse->priv->detecting) {
3219 ret = klass->detect (parse, buffer);
3220 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3221 /* If draining we error out, otherwise request a buffer
3223 if (parse->priv->drain) {
3224 gst_buffer_unref (buffer);
3225 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3226 return GST_FLOW_ERROR;
3229 gst_buffer_unref (buffer);
3232 } else if (ret != GST_FLOW_OK) {
3233 gst_buffer_unref (buffer);
3234 GST_ERROR_OBJECT (parse, "detect() returned %s",
3235 gst_flow_get_name (ret));
3239 /* Else handle this buffer normally */
3242 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3243 if (ret != GST_FLOW_OK)
3246 /* If a large amount of data was requested to be skipped, _handle_buffer
3247 might have set the priv->skip flag to an extra amount on top of skip.
3248 In pull mode, we can just pull from the new offset directly. */
3249 parse->priv->offset += parse->priv->skip;
3250 parse->priv->skip = 0;
3252 /* something flushed means something happened,
3253 * and we should bail out of this loop so as not to occupy
3254 * the task thread indefinitely */
3256 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3259 /* nothing flushed, no skip and draining, so nothing left to do */
3260 if (!skip && parse->priv->drain) {
3261 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3262 "breaking loop and marking EOS");
3266 /* otherwise, get some more data
3267 * note that is checked this does not happen indefinitely */
3269 GST_LOG_OBJECT (parse, "getting some more data");
3272 parse->priv->drain = FALSE;
3279 /* Loop that is used in pull mode to retrieve data from upstream */
3281 gst_base_parse_loop (GstPad * pad)
3283 GstBaseParse *parse;
3284 GstBaseParseClass *klass;
3285 GstFlowReturn ret = GST_FLOW_OK;
3287 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3288 klass = GST_BASE_PARSE_GET_CLASS (parse);
3290 GST_LOG_OBJECT (parse, "Entering parse loop");
3292 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3297 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3300 event = gst_event_new_stream_start (stream_id);
3301 gst_event_set_group_id (event, gst_util_group_id_next ());
3303 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3304 gst_pad_push_event (parse->srcpad, event);
3305 parse->priv->push_stream_start = FALSE;
3309 /* reverse playback:
3310 * first fragment (closest to stop time) is handled normally below,
3311 * then we pull in fragments going backwards */
3312 if (parse->segment.rate < 0.0) {
3313 /* check if we jumped back to a previous fragment,
3314 * which is a post-first fragment */
3315 if (parse->priv->offset < 0) {
3316 ret = gst_base_parse_handle_previous_fragment (parse);
3321 ret = gst_base_parse_scan_frame (parse, klass);
3322 if (ret != GST_FLOW_OK)
3325 /* eat expected eos signalling past segment in reverse playback */
3326 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3327 parse->segment.position >= parse->segment.stop) {
3328 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3329 /* push what was accumulated during loop run */
3330 gst_base_parse_finish_fragment (parse, FALSE);
3331 /* force previous fragment */
3332 parse->priv->offset = -1;
3337 if (ret == GST_FLOW_EOS)
3339 else if (ret != GST_FLOW_OK)
3342 gst_object_unref (parse);
3349 GST_DEBUG_OBJECT (parse, "eos");
3354 gboolean push_eos = FALSE;
3356 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3357 gst_flow_get_name (ret));
3358 gst_pad_pause_task (parse->sinkpad);
3360 if (ret == GST_FLOW_EOS) {
3361 /* handle end-of-stream/segment */
3362 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3365 if ((stop = parse->segment.stop) == -1)
3366 stop = parse->segment.duration;
3368 GST_DEBUG_OBJECT (parse, "sending segment_done");
3370 gst_element_post_message
3371 (GST_ELEMENT_CAST (parse),
3372 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3373 GST_FORMAT_TIME, stop));
3374 gst_pad_push_event (parse->srcpad,
3375 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3377 /* If we STILL have zero frames processed, fire an error */
3378 if (parse->priv->framecount == 0) {
3379 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3380 ("No valid frames found before end of stream"), (NULL));
3384 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3385 /* for fatal errors we post an error message, wrong-state is
3386 * not fatal because it happens due to flushes and only means
3387 * that we should stop now. */
3388 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3389 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3393 /* Push pending events, including SEGMENT events */
3394 gst_base_parse_push_pending_events (parse);
3396 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3398 gst_object_unref (parse);
3403 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3405 GstSchedulingFlags sched_flags;
3406 GstBaseParse *parse;
3410 parse = GST_BASE_PARSE (parent);
3412 GST_DEBUG_OBJECT (parse, "sink activate");
3414 query = gst_query_new_scheduling ();
3415 if (!gst_pad_peer_query (sinkpad, query)) {
3416 gst_query_unref (query);
3417 goto baseparse_push;
3420 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3422 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3423 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3425 gst_query_unref (query);
3428 goto baseparse_push;
3430 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3431 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3432 goto baseparse_push;
3434 parse->priv->push_stream_start = TRUE;
3436 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3441 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3442 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3447 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3449 GstBaseParseClass *klass;
3450 gboolean result = TRUE;
3452 GST_DEBUG_OBJECT (parse, "activate %d", active);
3454 klass = GST_BASE_PARSE_GET_CLASS (parse);
3457 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3458 result = klass->start (parse);
3460 /* If the subclass implements ::detect we want to
3461 * call it for the first buffers now */
3462 parse->priv->detecting = (klass->detect != NULL);
3464 /* We must make sure streaming has finished before resetting things
3465 * and calling the ::stop vfunc */
3466 GST_PAD_STREAM_LOCK (parse->sinkpad);
3467 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3469 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3470 result = klass->stop (parse);
3472 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3474 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3479 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3480 GstPadMode mode, gboolean active)
3483 GstBaseParse *parse;
3485 parse = GST_BASE_PARSE (parent);
3487 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3488 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3490 if (!gst_base_parse_activate (parse, active))
3491 goto activate_failed;
3494 case GST_PAD_MODE_PULL:
3496 parse->priv->pending_events =
3497 g_list_prepend (parse->priv->pending_events,
3498 gst_event_new_segment (&parse->segment));
3501 result = gst_pad_stop_task (pad);
3509 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3511 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3518 GST_DEBUG_OBJECT (parse, "activate failed");
3524 * gst_base_parse_set_duration:
3525 * @parse: #GstBaseParse.
3527 * @duration: duration value.
3528 * @interval: how often to update the duration estimate based on bitrate, or 0.
3530 * Sets the duration of the currently playing media. Subclass can use this
3531 * when it is able to determine duration and/or notices a change in the media
3532 * duration. Alternatively, if @interval is non-zero (default), then stream
3533 * duration is determined based on estimated bitrate, and updated every @interval
3537 gst_base_parse_set_duration (GstBaseParse * parse,
3538 GstFormat fmt, gint64 duration, gint interval)
3540 g_return_if_fail (parse != NULL);
3542 if (parse->priv->upstream_has_duration) {
3543 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3547 if (duration != parse->priv->duration) {
3550 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3551 gst_element_post_message (GST_ELEMENT (parse), m);
3553 /* TODO: what about duration tag? */
3555 parse->priv->duration = duration;
3556 parse->priv->duration_fmt = fmt;
3557 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3558 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3559 if (interval != 0) {
3560 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3564 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3565 parse->priv->update_interval = interval;
3571 * gst_base_parse_set_average_bitrate:
3572 * @parse: #GstBaseParse.
3573 * @bitrate: average bitrate in bits/second
3575 * Optionally sets the average bitrate detected in media (if non-zero),
3576 * e.g. based on metadata, as it will be posted to the application.
3578 * By default, announced average bitrate is estimated. The average bitrate
3579 * is used to estimate the total duration of the stream and to estimate
3580 * a seek position, if there's no index and the format is syncable
3581 * (see gst_base_parse_set_syncable()).
3584 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3586 parse->priv->bitrate = bitrate;
3587 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3591 * gst_base_parse_set_min_frame_size:
3592 * @parse: #GstBaseParse.
3593 * @min_size: Minimum size of the data that this base class should give to
3596 * Subclass can use this function to tell the base class that it needs to
3597 * give at least #min_size buffers.
3600 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3602 g_return_if_fail (parse != NULL);
3604 parse->priv->min_frame_size = min_size;
3605 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3609 * gst_base_parse_set_frame_rate:
3610 * @parse: the #GstBaseParse to set
3611 * @fps_num: frames per second (numerator).
3612 * @fps_den: frames per second (denominator).
3613 * @lead_in: frames needed before a segment for subsequent decode
3614 * @lead_out: frames needed after a segment
3616 * If frames per second is configured, parser can take care of buffer duration
3617 * and timestamping. When performing segment clipping, or seeking to a specific
3618 * location, a corresponding decoder might need an initial @lead_in and a
3619 * following @lead_out number of frames to ensure the desired segment is
3620 * entirely filled upon decoding.
3623 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3624 guint fps_den, guint lead_in, guint lead_out)
3626 g_return_if_fail (parse != NULL);
3628 parse->priv->fps_num = fps_num;
3629 parse->priv->fps_den = fps_den;
3630 if (!fps_num || !fps_den) {
3631 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3633 fps_num = fps_den = 0;
3634 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3635 parse->priv->lead_in = parse->priv->lead_out = 0;
3636 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3638 parse->priv->frame_duration =
3639 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3640 parse->priv->lead_in = lead_in;
3641 parse->priv->lead_out = lead_out;
3642 parse->priv->lead_in_ts =
3643 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3644 parse->priv->lead_out_ts =
3645 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3646 /* aim for about 1.5s to estimate duration */
3647 if (parse->priv->update_interval < 0) {
3648 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3649 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3650 parse->priv->update_interval);
3653 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3654 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3655 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3656 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3657 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3658 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3662 * gst_base_parse_set_has_timing_info:
3663 * @parse: a #GstBaseParse
3664 * @has_timing: whether frames carry timing information
3666 * Set if frames carry timing information which the subclass can (generally)
3667 * parse and provide. In particular, intrinsic (rather than estimated) time
3668 * can be obtained following a seek.
3671 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3673 parse->priv->has_timing_info = has_timing;
3674 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3678 * gst_base_parse_set_syncable:
3679 * @parse: a #GstBaseParse
3680 * @syncable: set if frame starts can be identified
3682 * Set if frame starts can be identified. This is set by default and
3683 * determines whether seeking based on bitrate averages
3684 * is possible for a format/stream.
3687 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3689 parse->priv->syncable = syncable;
3690 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3694 * gst_base_parse_set_passthrough:
3695 * @parse: a #GstBaseParse
3696 * @passthrough: %TRUE if parser should run in passthrough mode
3698 * Set if the nature of the format or configuration does not allow (much)
3699 * parsing, and the parser should operate in passthrough mode (which only
3700 * applies when operating in push mode). That is, incoming buffers are
3701 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3702 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3703 * so subclass can perform as much or as little is appropriate for
3704 * passthrough semantics in @pre_push_frame.
3707 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3709 parse->priv->passthrough = passthrough;
3710 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3714 * gst_base_parse_set_pts_interpolation:
3715 * @parse: a #GstBaseParse
3716 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3718 * By default, the base class will guess PTS timestamps using a simple
3719 * interpolation (previous timestamp + duration), which is incorrect for
3720 * data streams with reordering, where PTS can go backward. Sub-classes
3721 * implementing such formats should disable PTS interpolation.
3724 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3725 gboolean pts_interpolate)
3727 parse->priv->pts_interpolate = pts_interpolate;
3728 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3729 (pts_interpolate) ? "yes" : "no");
3733 * gst_base_parse_set_infer_ts:
3734 * @parse: a #GstBaseParse
3735 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3737 * By default, the base class might try to infer PTS from DTS and vice
3738 * versa. While this is generally correct for audio data, it may not
3739 * be otherwise. Sub-classes implementing such formats should disable
3740 * timestamp inferring.
3743 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3745 parse->priv->infer_ts = infer_ts;
3746 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3750 * gst_base_parse_set_latency:
3751 * @parse: a #GstBaseParse
3752 * @min_latency: minimum parse latency
3753 * @max_latency: maximum parse latency
3755 * Sets the minimum and maximum (which may likely be equal) latency introduced
3756 * by the parsing process. If there is such a latency, which depends on the
3757 * particular parsing of the format, it typically corresponds to 1 frame duration.
3760 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3761 GstClockTime max_latency)
3763 g_return_if_fail (min_latency != GST_CLOCK_TIME_NONE);
3764 g_return_if_fail (min_latency <= max_latency);
3766 GST_OBJECT_LOCK (parse);
3767 parse->priv->min_latency = min_latency;
3768 parse->priv->max_latency = max_latency;
3769 GST_OBJECT_UNLOCK (parse);
3770 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3771 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3772 GST_TIME_ARGS (max_latency));
3776 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3777 GstClockTime * duration)
3779 gboolean res = FALSE;
3781 g_return_val_if_fail (duration != NULL, FALSE);
3783 *duration = GST_CLOCK_TIME_NONE;
3784 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3785 GST_LOG_OBJECT (parse, "using provided duration");
3786 *duration = parse->priv->duration;
3788 } else if (parse->priv->duration != -1) {
3789 GST_LOG_OBJECT (parse, "converting provided duration");
3790 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3791 parse->priv->duration, format, (gint64 *) duration);
3792 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3793 GST_LOG_OBJECT (parse, "using estimated duration");
3794 *duration = parse->priv->estimated_duration;
3797 GST_LOG_OBJECT (parse, "cannot estimate duration");
3800 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3801 GST_TIME_ARGS (*duration));
3806 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3808 gboolean res = FALSE;
3811 pad = GST_BASE_PARSE_SRC_PAD (parse);
3813 switch (GST_QUERY_TYPE (query)) {
3814 case GST_QUERY_POSITION:
3819 GST_DEBUG_OBJECT (parse, "position query");
3820 gst_query_parse_position (query, &format, NULL);
3822 /* try upstream first */
3823 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3825 /* Fall back on interpreting segment */
3826 GST_OBJECT_LOCK (parse);
3827 if (format == GST_FORMAT_BYTES) {
3828 dest_value = parse->priv->offset;
3830 } else if (format == parse->segment.format &&
3831 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3832 dest_value = gst_segment_to_stream_time (&parse->segment,
3833 parse->segment.format, parse->segment.position);
3836 GST_OBJECT_UNLOCK (parse);
3838 /* no precise result, upstream no idea either, then best estimate */
3839 /* priv->offset is updated in both PUSH/PULL modes */
3840 res = gst_base_parse_convert (parse,
3841 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3844 gst_query_set_position (query, format, dest_value);
3848 case GST_QUERY_DURATION:
3851 GstClockTime duration;
3853 GST_DEBUG_OBJECT (parse, "duration query");
3854 gst_query_parse_duration (query, &format, NULL);
3856 /* consult upstream */
3857 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3859 /* otherwise best estimate from us */
3861 res = gst_base_parse_get_duration (parse, format, &duration);
3863 gst_query_set_duration (query, format, duration);
3867 case GST_QUERY_SEEKING:
3870 GstClockTime duration = GST_CLOCK_TIME_NONE;
3871 gboolean seekable = FALSE;
3873 GST_DEBUG_OBJECT (parse, "seeking query");
3874 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3876 /* consult upstream */
3877 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3879 /* we may be able to help if in TIME */
3880 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3881 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3882 /* already OK if upstream takes care */
3883 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3885 if (!(res && seekable)) {
3886 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3887 || duration == -1) {
3888 /* seekable if we still have a chance to get duration later on */
3890 parse->priv->upstream_seekable && parse->priv->update_interval;
3892 seekable = parse->priv->upstream_seekable;
3893 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3896 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3902 case GST_QUERY_FORMATS:
3903 gst_query_set_formatsv (query, 3, fmtlist);
3906 case GST_QUERY_CONVERT:
3908 GstFormat src_format, dest_format;
3909 gint64 src_value, dest_value;
3911 gst_query_parse_convert (query, &src_format, &src_value,
3912 &dest_format, &dest_value);
3914 res = gst_base_parse_convert (parse, src_format, src_value,
3915 dest_format, &dest_value);
3917 gst_query_set_convert (query, src_format, src_value,
3918 dest_format, dest_value);
3922 case GST_QUERY_LATENCY:
3924 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3926 GstClockTime min_latency, max_latency;
3928 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3929 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3930 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3931 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3933 GST_OBJECT_LOCK (parse);
3934 /* add our latency */
3935 min_latency += parse->priv->min_latency;
3936 if (max_latency == -1 || parse->priv->max_latency == -1)
3939 max_latency += parse->priv->max_latency;
3940 GST_OBJECT_UNLOCK (parse);
3942 gst_query_set_latency (query, live, min_latency, max_latency);
3946 case GST_QUERY_SEGMENT:
3951 format = parse->segment.format;
3954 gst_segment_to_stream_time (&parse->segment, format,
3955 parse->segment.start);
3956 if ((stop = parse->segment.stop) == -1)
3957 stop = parse->segment.duration;
3959 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3961 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3966 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3972 /* scans for a cluster start from @pos,
3973 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3974 static GstFlowReturn
3975 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3976 GstClockTime * time, GstClockTime * duration)
3978 GstBaseParseClass *klass;
3980 gboolean orig_drain, orig_discont;
3981 GstFlowReturn ret = GST_FLOW_OK;
3982 GstBuffer *buf = NULL;
3983 GstBaseParseFrame *sframe = NULL;
3985 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3986 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3987 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3989 klass = GST_BASE_PARSE_GET_CLASS (parse);
3991 *time = GST_CLOCK_TIME_NONE;
3992 *duration = GST_CLOCK_TIME_NONE;
3995 orig_offset = parse->priv->offset;
3996 orig_discont = parse->priv->discont;
3997 orig_drain = parse->priv->drain;
3999 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
4000 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
4002 /* jump elsewhere and locate next frame */
4003 parse->priv->offset = *pos;
4004 /* mark as scanning so frames don't get processed all the way */
4005 parse->priv->scanning = TRUE;
4006 ret = gst_base_parse_scan_frame (parse, klass);
4007 parse->priv->scanning = FALSE;
4008 /* retrieve frame found during scan */
4009 sframe = parse->priv->scanned_frame;
4010 parse->priv->scanned_frame = NULL;
4012 if (ret != GST_FLOW_OK || !sframe)
4015 /* get offset first, subclass parsing might dump other stuff in there */
4016 *pos = sframe->offset;
4017 buf = sframe->buffer;
4020 /* but it should provide proper time */
4021 *time = GST_BUFFER_TIMESTAMP (buf);
4022 *duration = GST_BUFFER_DURATION (buf);
4024 GST_LOG_OBJECT (parse,
4025 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
4026 GST_TIME_ARGS (*time), *pos);
4030 gst_base_parse_frame_free (sframe);
4033 parse->priv->offset = orig_offset;
4034 parse->priv->discont = orig_discont;
4035 parse->priv->drain = orig_drain;
4040 /* bisect and scan through file for frame starting before @time,
4041 * returns OK and @time/@offset if found, NONE and/or error otherwise
4042 * If @time == G_MAXINT64, scan for duration ( == last frame) */
4043 static GstFlowReturn
4044 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
4047 GstFlowReturn ret = GST_FLOW_OK;
4048 gint64 lpos, hpos, newpos;
4049 GstClockTime time, ltime, htime, newtime, dur;
4050 gboolean cont = TRUE;
4051 const GstClockTime tolerance = TARGET_DIFFERENCE;
4052 const guint chunk = 4 * 1024;
4054 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
4055 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
4057 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
4058 GST_TIME_ARGS (*_time));
4060 /* TODO also make keyframe aware if useful some day */
4075 /* do not know at first */
4077 *_time = GST_CLOCK_TIME_NONE;
4079 /* need initial positions; start and end */
4080 lpos = parse->priv->first_frame_offset;
4081 ltime = parse->priv->first_frame_pts;
4082 /* try other one if no luck */
4083 if (!GST_CLOCK_TIME_IS_VALID (ltime))
4084 ltime = parse->priv->first_frame_dts;
4085 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
4086 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
4087 return GST_FLOW_ERROR;
4089 hpos = parse->priv->upstream_size;
4091 GST_DEBUG_OBJECT (parse,
4092 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
4093 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
4094 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
4096 /* check preconditions are satisfied;
4097 * start and end are needed, except for special case where we scan for
4098 * last frame to determine duration */
4099 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
4100 !GST_CLOCK_TIME_IS_VALID (ltime) ||
4101 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
4105 /* shortcut cases */
4108 } else if (time < ltime + tolerance) {
4112 } else if (time >= htime) {
4118 while (htime > ltime && cont) {
4119 GST_LOG_OBJECT (parse,
4120 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
4121 GST_TIME_ARGS (ltime));
4122 GST_LOG_OBJECT (parse,
4123 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
4124 GST_TIME_ARGS (htime));
4125 if (G_UNLIKELY (time == G_MAXINT64)) {
4127 } else if (G_LIKELY (hpos > lpos)) {
4129 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
4132 /* should mean lpos == hpos, since lpos <= hpos is invariant */
4134 /* we check this case once, but not forever, so break loop */
4139 newpos = CLAMP (newpos, lpos, hpos);
4140 GST_LOG_OBJECT (parse,
4141 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
4142 GST_TIME_ARGS (time), newpos);
4144 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
4145 if (ret == GST_FLOW_EOS) {
4146 /* heuristic HACK */
4147 hpos = MAX (lpos, hpos - chunk);
4149 } else if (ret != GST_FLOW_OK) {
4153 if (newtime == -1 || newpos == -1) {
4154 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
4158 if (G_UNLIKELY (time == G_MAXINT64)) {
4161 if (GST_CLOCK_TIME_IS_VALID (dur))
4164 } else if (newtime > time) {
4166 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
4168 } else if (newtime + tolerance > time) {
4169 /* close enough undershoot */
4173 } else if (newtime < ltime) {
4174 /* so a position beyond lpos resulted in earlier time than ltime ... */
4175 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4178 /* undershoot too far */
4179 newpos += newpos == lpos ? chunk : 0;
4180 lpos = CLAMP (newpos, lpos, hpos);
4186 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4187 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4192 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4193 gboolean before, GstClockTime * _ts)
4195 gint64 bytes = 0, ts = 0;
4196 GstIndexEntry *entry = NULL;
4198 if (time == GST_CLOCK_TIME_NONE) {
4204 GST_BASE_PARSE_INDEX_LOCK (parse);
4205 if (parse->priv->index) {
4206 /* Let's check if we have an index entry for that time */
4207 entry = gst_index_get_assoc_entry (parse->priv->index,
4208 parse->priv->index_id,
4209 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4210 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4214 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4215 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4217 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4218 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4219 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4221 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4222 GST_TIME_ARGS (time));
4225 ts = GST_CLOCK_TIME_NONE;
4228 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4237 /* returns TRUE if seek succeeded */
4239 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4244 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4245 gboolean flush, update, res = TRUE, accurate;
4246 gint64 start, stop, seekpos, seekstop;
4247 GstSegment seeksegment = { 0, };
4248 GstClockTime start_ts;
4250 GstEvent *segment_event;
4252 /* try upstream first, unless we're driving the streaming thread ourselves */
4253 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4254 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4259 gst_event_parse_seek (event, &rate, &format, &flags,
4260 &start_type, &start, &stop_type, &stop);
4261 seqnum = gst_event_get_seqnum (event);
4263 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4264 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4265 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4266 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4268 /* we can only handle TIME, so check if subclass can convert
4269 * to TIME format if it's some other format (such as DEFAULT) */
4270 if (format != GST_FORMAT_TIME) {
4271 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4272 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4274 goto no_convert_to_time;
4276 GST_INFO_OBJECT (parse, "converted %s format to start time "
4277 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4278 gst_format_get_name (format), GST_TIME_ARGS (start),
4279 GST_TIME_ARGS (stop));
4281 format = GST_FORMAT_TIME;
4284 /* no negative rates in push mode (unless upstream takes care of that, but
4285 * we've already tried upstream and it didn't handle the seek request) */
4286 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4289 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4290 goto negative_rate_pull_mode;
4292 if (start_type != GST_SEEK_TYPE_SET ||
4293 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4296 /* get flush flag */
4297 flush = flags & GST_SEEK_FLAG_FLUSH;
4299 /* copy segment, we need this because we still need the old
4300 * segment when we close the current segment. */
4301 gst_segment_copy_into (&parse->segment, &seeksegment);
4303 GST_DEBUG_OBJECT (parse, "configuring seek");
4304 gst_segment_do_seek (&seeksegment, rate, format, flags,
4305 start_type, start, stop_type, stop, &update);
4307 /* accurate seeking implies seek tables are used to obtain position,
4308 * and the requested segment is maintained exactly, not adjusted any way */
4309 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4311 /* maybe we can be accurate for (almost) free */
4312 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4313 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4314 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4318 GstClockTime startpos = seeksegment.position;
4320 /* accurate requested, so ... seek a bit before target */
4321 if (startpos < parse->priv->lead_in_ts)
4324 startpos -= parse->priv->lead_in_ts;
4325 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4326 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4329 start_ts = seeksegment.position;
4330 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4331 GST_FORMAT_BYTES, &seekpos))
4332 goto convert_failed;
4333 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4334 GST_FORMAT_BYTES, &seekstop))
4335 goto convert_failed;
4338 GST_DEBUG_OBJECT (parse,
4339 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4341 GST_DEBUG_OBJECT (parse,
4342 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4343 seeksegment.stop, seekstop);
4345 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4348 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4351 if (parse->srcpad) {
4352 GstEvent *fevent = gst_event_new_flush_start ();
4353 GST_DEBUG_OBJECT (parse, "sending flush start");
4355 gst_event_set_seqnum (fevent, seqnum);
4357 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4358 /* unlock upstream pull_range */
4359 gst_pad_push_event (parse->sinkpad, fevent);
4362 gst_pad_pause_task (parse->sinkpad);
4365 /* we should now be able to grab the streaming thread because we stopped it
4366 * with the above flush/pause code */
4367 GST_PAD_STREAM_LOCK (parse->sinkpad);
4369 /* save current position */
4370 last_stop = parse->segment.position;
4371 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4374 /* now commit to new position */
4376 /* prepare for streaming again */
4378 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4379 GST_DEBUG_OBJECT (parse, "sending flush stop");
4380 gst_event_set_seqnum (fevent, seqnum);
4381 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4382 gst_pad_push_event (parse->sinkpad, fevent);
4383 gst_base_parse_clear_queues (parse);
4385 /* keep track of our position */
4386 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4387 seeksegment.format, parse->segment.position);
4390 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4392 /* store the newsegment event so it can be sent from the streaming thread. */
4393 /* This will be sent later in _loop() */
4394 segment_event = gst_event_new_segment (&parse->segment);
4395 gst_event_set_seqnum (segment_event, seqnum);
4396 parse->priv->pending_events =
4397 g_list_prepend (parse->priv->pending_events, segment_event);
4399 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4400 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4401 ", time = %" GST_TIME_FORMAT, format,
4402 GST_TIME_ARGS (parse->segment.start),
4403 GST_TIME_ARGS (parse->segment.stop),
4404 GST_TIME_ARGS (parse->segment.time));
4406 /* one last chance in pull mode to stay accurate;
4407 * maybe scan and subclass can find where to go */
4410 GstClockTime ts = seeksegment.position;
4412 gst_base_parse_locate_time (parse, &ts, &scanpos);
4416 /* running collected index now consists of several intervals,
4417 * so optimized check no longer possible */
4418 parse->priv->index_last_valid = FALSE;
4419 parse->priv->index_last_offset = 0;
4420 parse->priv->index_last_ts = 0;
4424 /* mark discont if we are going to stream from another position. */
4425 if (seekpos != parse->priv->offset) {
4426 GST_DEBUG_OBJECT (parse,
4427 "mark DISCONT, we did a seek to another position");
4428 parse->priv->offset = seekpos;
4429 parse->priv->last_offset = seekpos;
4430 parse->priv->seen_keyframe = FALSE;
4431 parse->priv->discont = TRUE;
4432 parse->priv->next_dts = start_ts;
4433 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4434 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4435 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4436 parse->priv->sync_offset = seekpos;
4437 parse->priv->exact_position = accurate;
4440 /* Start streaming thread if paused */
4441 gst_pad_start_task (parse->sinkpad,
4442 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4444 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4449 GstEvent *new_event;
4450 GstBaseParseSeek *seek;
4451 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4453 /* The only thing we need to do in PUSH-mode is to send the
4454 seek event (in bytes) to upstream. Segment / flush handling happens
4455 in corresponding src event handlers */
4456 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4457 if (seekstop >= 0 && seekstop <= seekpos)
4459 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4460 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4461 gst_event_set_seqnum (new_event, seqnum);
4463 /* store segment info so its precise details can be reconstructed when
4464 * receiving newsegment;
4465 * this matters for all details when accurate seeking,
4466 * is most useful to preserve NONE stop time otherwise */
4467 seek = g_new0 (GstBaseParseSeek, 1);
4468 seek->segment = seeksegment;
4469 seek->accurate = accurate;
4470 seek->offset = seekpos;
4471 seek->start_ts = start_ts;
4472 GST_OBJECT_LOCK (parse);
4473 /* less optimal, but preserves order */
4474 parse->priv->pending_seeks =
4475 g_slist_append (parse->priv->pending_seeks, seek);
4476 GST_OBJECT_UNLOCK (parse);
4478 res = gst_pad_push_event (parse->sinkpad, new_event);
4481 GST_OBJECT_LOCK (parse);
4482 parse->priv->pending_seeks =
4483 g_slist_remove (parse->priv->pending_seeks, seek);
4484 GST_OBJECT_UNLOCK (parse);
4490 gst_event_unref (event);
4494 negative_rate_pull_mode:
4496 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4502 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4508 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4514 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4515 "couldn't convert that into TIME format", gst_format_get_name (format));
4521 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4527 /* Checks if bitrates are available from upstream tags so that we don't
4528 * override them later
4531 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4533 GstTagList *taglist = NULL;
4536 gst_event_parse_tag (event, &taglist);
4538 /* We only care about stream tags here */
4539 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4542 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4543 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4544 parse->priv->post_min_bitrate = FALSE;
4546 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4547 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4548 parse->priv->post_avg_bitrate = FALSE;
4550 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4551 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4552 parse->priv->post_max_bitrate = FALSE;
4558 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4560 GstBaseParse *parse = GST_BASE_PARSE (element);
4562 GST_BASE_PARSE_INDEX_LOCK (parse);
4563 if (parse->priv->index)
4564 gst_object_unref (parse->priv->index);
4566 parse->priv->index = gst_object_ref (index);
4567 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4568 &parse->priv->index_id);
4569 parse->priv->own_index = FALSE;
4571 parse->priv->index = NULL;
4573 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4577 gst_base_parse_get_index (GstElement * element)
4579 GstBaseParse *parse = GST_BASE_PARSE (element);
4580 GstIndex *result = NULL;
4582 GST_BASE_PARSE_INDEX_LOCK (parse);
4583 if (parse->priv->index)
4584 result = gst_object_ref (parse->priv->index);
4585 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4591 static GstStateChangeReturn
4592 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4594 GstBaseParse *parse;
4595 GstStateChangeReturn result;
4597 parse = GST_BASE_PARSE (element);
4599 switch (transition) {
4600 case GST_STATE_CHANGE_READY_TO_PAUSED:
4601 /* If this is our own index destroy it as the
4602 * old entries might be wrong for the new stream */
4603 GST_BASE_PARSE_INDEX_LOCK (parse);
4604 if (parse->priv->own_index) {
4605 gst_object_unref (parse->priv->index);
4606 parse->priv->index = NULL;
4607 parse->priv->own_index = FALSE;
4610 /* If no index was created, generate one */
4611 if (G_UNLIKELY (!parse->priv->index)) {
4612 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4614 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4615 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4616 &parse->priv->index_id);
4617 parse->priv->own_index = TRUE;
4619 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4625 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4627 switch (transition) {
4628 case GST_STATE_CHANGE_PAUSED_TO_READY:
4629 gst_base_parse_reset (parse);
4639 * gst_base_parse_set_ts_at_offset:
4640 * @parse: a #GstBaseParse
4641 * @offset: offset into current buffer
4643 * This function should only be called from a @handle_frame implementation.
4645 * #GstBaseParse creates initial timestamps for frames by using the last
4646 * timestamp seen in the stream before the frame starts. In certain
4647 * cases, the correct timestamps will occur in the stream after the
4648 * start of the frame, but before the start of the actual picture data.
4649 * This function can be used to set the timestamps based on the offset
4650 * into the frame data that the picture starts.
4655 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4657 GstClockTime pts, dts;
4659 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4661 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4662 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4664 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4665 GST_DEBUG_OBJECT (parse,
4666 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4667 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4669 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4670 parse->priv->prev_pts = parse->priv->next_pts = pts;
4672 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4673 parse->priv->prev_dts = parse->priv->next_dts = dts;