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 overriden) will then use these
188 * rates to perform obvious conversions. These rates are also used to
189 * update (estimated) duration at regular frame intervals.
196 * - In push mode provide a queue of adapter-"queued" buffers for upstream
198 * - Queue buffers/events until caps are set
208 #include <gst/base/gstadapter.h>
210 #include "gstbaseparse.h"
212 /* FIXME: get rid of old GstIndex code */
213 #include "gstindex.h"
214 #include "gstindex.c"
215 #include "gstmemindex.c"
217 #define GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC (1 << 0)
219 #define MIN_FRAMES_TO_POST_BITRATE 10
220 #define TARGET_DIFFERENCE (20 * GST_SECOND)
221 #define MAX_INDEX_ENTRIES 4096
223 GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
224 #define GST_CAT_DEFAULT gst_base_parse_debug
226 /* Supported formats */
227 static const GstFormat fmtlist[] = {
234 #define GST_BASE_PARSE_GET_PRIVATE(obj) \
235 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
237 struct _GstBaseParsePrivate
244 GstFormat duration_fmt;
245 gint64 estimated_duration;
246 gint64 estimated_drift;
248 guint min_frame_size;
249 gboolean disable_passthrough;
250 gboolean passthrough;
251 gboolean pts_interpolate;
254 gboolean has_timing_info;
255 guint fps_num, fps_den;
256 gint update_interval;
258 guint lead_in, lead_out;
259 GstClockTime lead_in_ts, lead_out_ts;
260 GstClockTime min_latency, max_latency;
268 GstClockTime next_pts;
269 GstClockTime next_dts;
270 GstClockTime prev_pts;
271 GstClockTime prev_dts;
272 GstClockTime frame_duration;
273 gboolean seen_keyframe;
279 guint64 data_bytecount;
280 guint64 acc_duration;
281 GstClockTime first_frame_pts;
282 GstClockTime first_frame_dts;
283 gint64 first_frame_offset;
285 gboolean post_min_bitrate;
286 gboolean post_avg_bitrate;
287 gboolean post_max_bitrate;
291 guint posted_avg_bitrate;
293 /* frames/buffers that are queued and ready to go on OK */
294 GQueue queued_frames;
298 /* index entry storage, either ours or provided */
304 /* seek table entries only maintained if upstream is BYTE seekable */
305 gboolean upstream_seekable;
306 gboolean upstream_has_duration;
307 gint64 upstream_size;
308 GstFormat upstream_format;
309 /* minimum distance between two index entries */
310 GstClockTimeDiff idx_interval;
311 guint64 idx_byte_interval;
312 /* ts and offset of last entry added */
313 GstClockTime index_last_ts;
314 gint64 index_last_offset;
315 gboolean index_last_valid;
317 /* timestamps currently produced are accurate, e.g. started from 0 onwards */
318 gboolean exact_position;
319 /* seek events are temporarily kept to match them with newsegments */
320 GSList *pending_seeks;
322 /* reverse playback */
323 GSList *buffers_pending;
324 GSList *buffers_head;
325 GSList *buffers_queued;
326 GSList *buffers_send;
327 GstClockTime last_pts;
328 GstClockTime last_dts;
331 /* Pending serialized events */
332 GList *pending_events;
333 /* Newsegment event to be sent after SEEK */
334 gboolean pending_segment;
336 /* offset of last parsed frame/data */
338 /* force a new frame, regardless of offset */
340 /* whether we are merely scanning for a frame */
342 /* ... and resulting frame, if any */
343 GstBaseParseFrame *scanned_frame;
345 /* TRUE if we're still detecting the format, i.e.
346 * if ::detect() is still called for future buffers */
348 GList *detect_buffers;
349 guint detect_buffers_size;
351 /* if TRUE, a STREAM_START event needs to be pushed */
352 gboolean push_stream_start;
355 typedef struct _GstBaseParseSeek
360 GstClockTime start_ts;
363 #define DEFAULT_DISABLE_PASSTHROUGH FALSE
368 PROP_DISABLE_PASSTHROUGH,
372 #define GST_BASE_PARSE_INDEX_LOCK(parse) \
373 g_mutex_lock (&parse->priv->index_lock);
374 #define GST_BASE_PARSE_INDEX_UNLOCK(parse) \
375 g_mutex_unlock (&parse->priv->index_lock);
377 static GstElementClass *parent_class = NULL;
379 static void gst_base_parse_class_init (GstBaseParseClass * klass);
380 static void gst_base_parse_init (GstBaseParse * parse,
381 GstBaseParseClass * klass);
384 gst_base_parse_get_type (void)
386 static volatile gsize base_parse_type = 0;
388 if (g_once_init_enter (&base_parse_type)) {
389 static const GTypeInfo base_parse_info = {
390 sizeof (GstBaseParseClass),
391 (GBaseInitFunc) NULL,
392 (GBaseFinalizeFunc) NULL,
393 (GClassInitFunc) gst_base_parse_class_init,
396 sizeof (GstBaseParse),
398 (GInstanceInitFunc) gst_base_parse_init,
402 _type = g_type_register_static (GST_TYPE_ELEMENT,
403 "GstBaseParse", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
404 g_once_init_leave (&base_parse_type, _type);
406 return (GType) base_parse_type;
409 static void gst_base_parse_finalize (GObject * object);
411 static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
412 GstStateChange transition);
413 static void gst_base_parse_reset (GstBaseParse * parse);
416 static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
417 static GstIndex *gst_base_parse_get_index (GstElement * element);
420 static gboolean gst_base_parse_sink_activate (GstPad * sinkpad,
422 static gboolean gst_base_parse_sink_activate_mode (GstPad * pad,
423 GstObject * parent, GstPadMode mode, gboolean active);
424 static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
426 static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
428 static void gst_base_parse_set_property (GObject * object, guint prop_id,
429 const GValue * value, GParamSpec * pspec);
430 static void gst_base_parse_get_property (GObject * object, guint prop_id,
431 GValue * value, GParamSpec * pspec);
433 static gboolean gst_base_parse_src_event (GstPad * pad, GstObject * parent,
435 static gboolean gst_base_parse_src_query (GstPad * pad, GstObject * parent,
438 static gboolean gst_base_parse_sink_event (GstPad * pad, GstObject * parent,
440 static gboolean gst_base_parse_sink_query (GstPad * pad, GstObject * parent,
443 static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstObject * parent,
445 static void gst_base_parse_loop (GstPad * pad);
447 static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
448 GstBaseParseFrame * frame);
450 static gboolean gst_base_parse_sink_event_default (GstBaseParse * parse,
453 static gboolean gst_base_parse_src_event_default (GstBaseParse * parse,
456 static gboolean gst_base_parse_sink_query_default (GstBaseParse * parse,
458 static gboolean gst_base_parse_src_query_default (GstBaseParse * parse,
461 static void gst_base_parse_drain (GstBaseParse * parse);
463 static void gst_base_parse_post_bitrates (GstBaseParse * parse,
464 gboolean post_min, gboolean post_avg, gboolean post_max);
466 static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
467 GstClockTime time, gboolean before, GstClockTime * _ts);
468 static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
469 GstClockTime * _time, gint64 * _offset);
471 static GstFlowReturn gst_base_parse_start_fragment (GstBaseParse * parse);
472 static GstFlowReturn gst_base_parse_finish_fragment (GstBaseParse * parse,
475 static inline GstFlowReturn gst_base_parse_check_sync (GstBaseParse * parse);
477 static gboolean gst_base_parse_is_seekable (GstBaseParse * parse);
480 gst_base_parse_clear_queues (GstBaseParse * parse)
482 g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
483 g_slist_free (parse->priv->buffers_queued);
484 parse->priv->buffers_queued = NULL;
485 g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
487 g_slist_free (parse->priv->buffers_pending);
488 parse->priv->buffers_pending = NULL;
489 g_slist_foreach (parse->priv->buffers_head, (GFunc) gst_buffer_unref, NULL);
490 g_slist_free (parse->priv->buffers_head);
491 parse->priv->buffers_head = NULL;
492 g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
493 g_slist_free (parse->priv->buffers_send);
494 parse->priv->buffers_send = NULL;
496 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
497 g_list_free (parse->priv->detect_buffers);
498 parse->priv->detect_buffers = NULL;
499 parse->priv->detect_buffers_size = 0;
501 g_queue_foreach (&parse->priv->queued_frames,
502 (GFunc) gst_base_parse_frame_free, NULL);
503 g_queue_clear (&parse->priv->queued_frames);
505 gst_buffer_replace (&parse->priv->cache, NULL);
507 g_list_foreach (parse->priv->pending_events, (GFunc) gst_event_unref, NULL);
508 g_list_free (parse->priv->pending_events);
509 parse->priv->pending_events = NULL;
510 parse->priv->pending_segment = FALSE;
514 gst_base_parse_finalize (GObject * object)
516 GstBaseParse *parse = GST_BASE_PARSE (object);
518 g_object_unref (parse->priv->adapter);
520 if (parse->priv->cache) {
521 gst_buffer_unref (parse->priv->cache);
522 parse->priv->cache = NULL;
525 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
527 g_list_free (parse->priv->pending_events);
528 parse->priv->pending_events = NULL;
529 parse->priv->pending_segment = FALSE;
531 if (parse->priv->index) {
532 gst_object_unref (parse->priv->index);
533 parse->priv->index = NULL;
535 g_mutex_clear (&parse->priv->index_lock);
537 gst_base_parse_clear_queues (parse);
539 G_OBJECT_CLASS (parent_class)->finalize (object);
543 gst_base_parse_class_init (GstBaseParseClass * klass)
545 GObjectClass *gobject_class;
546 GstElementClass *gstelement_class;
548 gobject_class = G_OBJECT_CLASS (klass);
549 g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
550 parent_class = g_type_class_peek_parent (klass);
552 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
553 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_base_parse_set_property);
554 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_base_parse_get_property);
557 * GstBaseParse:disable-passthrough:
559 * If set to #TRUE, baseparse will unconditionally force parsing of the
560 * incoming data. This can be required in the rare cases where the incoming
561 * side-data (caps, pts, dts, ...) is not trusted by the user and wants to
562 * force validation and parsing of the incoming data.
563 * If set to #FALSE, decision of whether to parse the data or not is up to
564 * the implementation (standard behaviour).
566 g_object_class_install_property (gobject_class, PROP_DISABLE_PASSTHROUGH,
567 g_param_spec_boolean ("disable-passthrough", "Disable passthrough",
568 "Force processing (disables passthrough)",
569 DEFAULT_DISABLE_PASSTHROUGH,
570 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
572 gstelement_class = (GstElementClass *) klass;
573 gstelement_class->change_state =
574 GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
577 gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
578 gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
581 /* Default handlers */
582 klass->sink_event = gst_base_parse_sink_event_default;
583 klass->src_event = gst_base_parse_src_event_default;
584 klass->sink_query = gst_base_parse_sink_query_default;
585 klass->src_query = gst_base_parse_src_query_default;
586 klass->convert = gst_base_parse_convert_default;
588 GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
589 "baseparse element");
593 gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
595 GstPadTemplate *pad_template;
597 GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
599 parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
602 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
603 g_return_if_fail (pad_template != NULL);
604 parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
605 gst_pad_set_event_function (parse->sinkpad,
606 GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
607 gst_pad_set_query_function (parse->sinkpad,
608 GST_DEBUG_FUNCPTR (gst_base_parse_sink_query));
609 gst_pad_set_chain_function (parse->sinkpad,
610 GST_DEBUG_FUNCPTR (gst_base_parse_chain));
611 gst_pad_set_activate_function (parse->sinkpad,
612 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
613 gst_pad_set_activatemode_function (parse->sinkpad,
614 GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_mode));
615 GST_PAD_SET_PROXY_ALLOCATION (parse->sinkpad);
616 gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
618 GST_DEBUG_OBJECT (parse, "sinkpad created");
621 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
622 g_return_if_fail (pad_template != NULL);
623 parse->srcpad = gst_pad_new_from_template (pad_template, "src");
624 gst_pad_set_event_function (parse->srcpad,
625 GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
626 gst_pad_set_query_function (parse->srcpad,
627 GST_DEBUG_FUNCPTR (gst_base_parse_src_query));
628 gst_pad_use_fixed_caps (parse->srcpad);
629 gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
630 GST_DEBUG_OBJECT (parse, "src created");
632 g_queue_init (&parse->priv->queued_frames);
634 parse->priv->adapter = gst_adapter_new ();
636 parse->priv->pad_mode = GST_PAD_MODE_NONE;
638 g_mutex_init (&parse->priv->index_lock);
641 gst_base_parse_reset (parse);
642 GST_DEBUG_OBJECT (parse, "init ok");
644 GST_OBJECT_FLAG_SET (parse, GST_ELEMENT_FLAG_INDEXABLE);
648 gst_base_parse_set_property (GObject * object, guint prop_id,
649 const GValue * value, GParamSpec * pspec)
651 GstBaseParse *parse = GST_BASE_PARSE (object);
654 case PROP_DISABLE_PASSTHROUGH:
655 parse->priv->disable_passthrough = g_value_get_boolean (value);
658 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
664 gst_base_parse_get_property (GObject * object, guint prop_id, GValue * value,
667 GstBaseParse *parse = GST_BASE_PARSE (object);
670 case PROP_DISABLE_PASSTHROUGH:
671 g_value_set_boolean (value, parse->priv->disable_passthrough);
674 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
679 static GstBaseParseFrame *
680 gst_base_parse_frame_copy (GstBaseParseFrame * frame)
682 GstBaseParseFrame *copy;
684 copy = g_slice_dup (GstBaseParseFrame, frame);
685 copy->buffer = gst_buffer_ref (frame->buffer);
686 copy->_private_flags &= ~GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
688 GST_TRACE ("copied frame %p -> %p", frame, copy);
694 gst_base_parse_frame_free (GstBaseParseFrame * frame)
696 GST_TRACE ("freeing frame %p", frame);
699 gst_buffer_unref (frame->buffer);
700 frame->buffer = NULL;
703 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
704 g_slice_free (GstBaseParseFrame, frame);
706 memset (frame, 0, sizeof (*frame));
710 G_DEFINE_BOXED_TYPE (GstBaseParseFrame, gst_base_parse_frame,
711 (GBoxedCopyFunc) gst_base_parse_frame_copy,
712 (GBoxedFreeFunc) gst_base_parse_frame_free);
715 * gst_base_parse_frame_init:
716 * @frame: #GstBaseParseFrame.
718 * Sets a #GstBaseParseFrame to initial state. Currently this means
719 * all public fields are zero-ed and a private flag is set to make
720 * sure gst_base_parse_frame_free() only frees the contents but not
721 * the actual frame. Use this function to initialise a #GstBaseParseFrame
722 * allocated on the stack.
725 gst_base_parse_frame_init (GstBaseParseFrame * frame)
727 memset (frame, 0, sizeof (GstBaseParseFrame));
728 frame->_private_flags = GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC;
729 GST_TRACE ("inited frame %p", frame);
733 * gst_base_parse_frame_new:
734 * @buffer: (transfer none): a #GstBuffer
736 * @overhead: number of bytes in this frame which should be counted as
737 * metadata overhead, ie. not used to calculate the average bitrate.
738 * Set to -1 to mark the entire frame as metadata. If in doubt, set to 0.
740 * Allocates a new #GstBaseParseFrame. This function is mainly for bindings,
741 * elements written in C should usually allocate the frame on the stack and
742 * then use gst_base_parse_frame_init() to initialise it.
744 * Returns: a newly-allocated #GstBaseParseFrame. Free with
745 * gst_base_parse_frame_free() when no longer needed.
748 gst_base_parse_frame_new (GstBuffer * buffer, GstBaseParseFrameFlags flags,
751 GstBaseParseFrame *frame;
753 frame = g_slice_new0 (GstBaseParseFrame);
754 frame->buffer = gst_buffer_ref (buffer);
756 GST_TRACE ("created frame %p", frame);
761 gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
764 gst_buffer_replace (&frame->buffer, buf);
768 /* set flags one by one for clarity */
769 if (G_UNLIKELY (parse->priv->drain))
770 parse->flags |= GST_BASE_PARSE_FLAG_DRAINING;
772 /* losing sync is pretty much a discont (and vice versa), no ? */
773 if (G_UNLIKELY (parse->priv->discont))
774 parse->flags |= GST_BASE_PARSE_FLAG_LOST_SYNC;
778 gst_base_parse_reset (GstBaseParse * parse)
780 GST_OBJECT_LOCK (parse);
781 gst_segment_init (&parse->segment, GST_FORMAT_TIME);
782 parse->priv->duration = -1;
783 parse->priv->min_frame_size = 1;
784 parse->priv->discont = TRUE;
785 parse->priv->flushing = FALSE;
786 parse->priv->offset = 0;
787 parse->priv->sync_offset = 0;
788 parse->priv->update_interval = -1;
789 parse->priv->fps_num = parse->priv->fps_den = 0;
790 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
791 parse->priv->lead_in = parse->priv->lead_out = 0;
792 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
793 parse->priv->bitrate = 0;
794 parse->priv->framecount = 0;
795 parse->priv->bytecount = 0;
796 parse->priv->acc_duration = 0;
797 parse->priv->first_frame_pts = GST_CLOCK_TIME_NONE;
798 parse->priv->first_frame_dts = GST_CLOCK_TIME_NONE;
799 parse->priv->first_frame_offset = -1;
800 parse->priv->estimated_duration = -1;
801 parse->priv->estimated_drift = 0;
802 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
803 parse->priv->next_dts = 0;
804 parse->priv->syncable = TRUE;
805 parse->priv->disable_passthrough = DEFAULT_DISABLE_PASSTHROUGH;
806 parse->priv->passthrough = FALSE;
807 parse->priv->pts_interpolate = TRUE;
808 parse->priv->infer_ts = TRUE;
809 parse->priv->has_timing_info = FALSE;
810 parse->priv->post_min_bitrate = TRUE;
811 parse->priv->post_avg_bitrate = TRUE;
812 parse->priv->post_max_bitrate = TRUE;
813 parse->priv->min_bitrate = G_MAXUINT;
814 parse->priv->max_bitrate = 0;
815 parse->priv->avg_bitrate = 0;
816 parse->priv->posted_avg_bitrate = 0;
818 parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
819 parse->priv->index_last_offset = -1;
820 parse->priv->index_last_valid = TRUE;
821 parse->priv->upstream_seekable = FALSE;
822 parse->priv->upstream_size = 0;
823 parse->priv->upstream_has_duration = FALSE;
824 parse->priv->upstream_format = GST_FORMAT_UNDEFINED;
825 parse->priv->idx_interval = 0;
826 parse->priv->idx_byte_interval = 0;
827 parse->priv->exact_position = TRUE;
828 parse->priv->seen_keyframe = FALSE;
830 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
831 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
832 parse->priv->last_offset = 0;
834 g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
836 g_list_free (parse->priv->pending_events);
837 parse->priv->pending_events = NULL;
838 parse->priv->pending_segment = FALSE;
840 if (parse->priv->cache) {
841 gst_buffer_unref (parse->priv->cache);
842 parse->priv->cache = NULL;
845 g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
846 g_slist_free (parse->priv->pending_seeks);
847 parse->priv->pending_seeks = NULL;
849 if (parse->priv->adapter)
850 gst_adapter_clear (parse->priv->adapter);
852 parse->priv->new_frame = TRUE;
854 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref, NULL);
855 g_list_free (parse->priv->detect_buffers);
856 parse->priv->detect_buffers = NULL;
857 parse->priv->detect_buffers_size = 0;
858 GST_OBJECT_UNLOCK (parse);
861 /* gst_base_parse_parse_frame:
862 * @parse: #GstBaseParse.
863 * @buffer: #GstBuffer.
865 * Default callback for parse_frame.
868 gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
870 GstBuffer *buffer = frame->buffer;
872 if (!GST_BUFFER_PTS_IS_VALID (buffer) &&
873 GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts)) {
874 GST_BUFFER_PTS (buffer) = parse->priv->next_pts;
876 if (!GST_BUFFER_DTS_IS_VALID (buffer) &&
877 GST_CLOCK_TIME_IS_VALID (parse->priv->next_dts)) {
878 GST_BUFFER_DTS (buffer) = parse->priv->next_dts;
880 if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
881 GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
882 GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
887 /* gst_base_parse_convert:
888 * @parse: #GstBaseParse.
889 * @src_format: #GstFormat describing the source format.
890 * @src_value: Source value to be converted.
891 * @dest_format: #GstFormat defining the converted format.
892 * @dest_value: Pointer where the conversion result will be put.
894 * Converts using configured "convert" vmethod in #GstBaseParse class.
896 * Returns: TRUE if conversion was successful.
899 gst_base_parse_convert (GstBaseParse * parse,
900 GstFormat src_format,
901 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
903 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
906 g_return_val_if_fail (dest_value != NULL, FALSE);
911 ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
913 #ifndef GST_DISABLE_GST_DEBUG
916 if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
917 GST_LOG_OBJECT (parse,
918 "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
919 GST_TIME_ARGS (src_value), *dest_value);
920 } else if (dest_format == GST_FORMAT_TIME &&
921 src_format == GST_FORMAT_BYTES) {
922 GST_LOG_OBJECT (parse,
923 "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
924 src_value, GST_TIME_ARGS (*dest_value));
926 GST_LOG_OBJECT (parse,
927 "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
928 GST_STR_NULL (gst_format_get_name (src_format)),
929 GST_STR_NULL (gst_format_get_name (dest_format)),
930 src_value, *dest_value);
933 GST_DEBUG_OBJECT (parse, "conversion failed");
941 /* gst_base_parse_sink_event:
942 * @pad: #GstPad that received the event.
943 * @event: #GstEvent to be handled.
945 * Handler for sink pad events.
947 * Returns: TRUE if the event was handled.
950 gst_base_parse_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
952 GstBaseParse *parse = GST_BASE_PARSE (parent);
953 GstBaseParseClass *bclass = GST_BASE_PARSE_GET_CLASS (parse);
956 ret = bclass->sink_event (parse, event);
962 /* gst_base_parse_sink_event_default:
963 * @parse: #GstBaseParse.
964 * @event: #GstEvent to be handled.
966 * Element-level event handler function.
968 * The event will be unreffed only if it has been handled and this
969 * function returns %TRUE
971 * Returns: %TRUE if the event was handled and not need forwarding.
974 gst_base_parse_sink_event_default (GstBaseParse * parse, GstEvent * event)
976 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
977 gboolean ret = FALSE;
978 gboolean forward_immediate = FALSE;
980 GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
981 GST_EVENT_TYPE_NAME (event));
983 switch (GST_EVENT_TYPE (event)) {
988 gst_event_parse_caps (event, &caps);
989 GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
991 if (klass->set_sink_caps)
992 ret = klass->set_sink_caps (parse, caps);
996 /* will send our own caps downstream */
997 gst_event_unref (event);
1001 case GST_EVENT_SEGMENT:
1003 const GstSegment *in_segment;
1004 GstSegment out_segment;
1005 gint64 offset = 0, next_dts;
1006 guint32 seqnum = gst_event_get_seqnum (event);
1008 gst_event_parse_segment (event, &in_segment);
1009 gst_segment_init (&out_segment, GST_FORMAT_TIME);
1011 GST_DEBUG_OBJECT (parse, "segment %" GST_SEGMENT_FORMAT, in_segment);
1013 parse->priv->upstream_format = in_segment->format;
1014 if (in_segment->format == GST_FORMAT_BYTES) {
1015 GstBaseParseSeek *seek = NULL;
1018 /* stop time is allowed to be open-ended, but not start & pos */
1019 offset = in_segment->time;
1021 GST_OBJECT_LOCK (parse);
1022 for (node = parse->priv->pending_seeks; node; node = node->next) {
1023 GstBaseParseSeek *tmp = node->data;
1025 if (tmp->offset == offset) {
1030 parse->priv->pending_seeks =
1031 g_slist_remove (parse->priv->pending_seeks, seek);
1032 GST_OBJECT_UNLOCK (parse);
1035 GST_DEBUG_OBJECT (parse,
1036 "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
1037 seek->accurate ? " accurate" : "", &seek->segment);
1039 out_segment.start = seek->segment.start;
1040 out_segment.stop = seek->segment.stop;
1041 out_segment.time = seek->segment.start;
1043 next_dts = seek->start_ts;
1044 parse->priv->exact_position = seek->accurate;
1047 /* best attempt convert */
1048 /* as these are only estimates, stop is kept open-ended to avoid
1049 * premature cutting */
1050 gst_base_parse_convert (parse, GST_FORMAT_BYTES, in_segment->start,
1051 GST_FORMAT_TIME, (gint64 *) & next_dts);
1053 out_segment.start = next_dts;
1054 out_segment.stop = GST_CLOCK_TIME_NONE;
1055 out_segment.time = next_dts;
1057 parse->priv->exact_position = (in_segment->start == 0);
1060 gst_event_unref (event);
1062 event = gst_event_new_segment (&out_segment);
1063 gst_event_set_seqnum (event, seqnum);
1065 GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. %"
1066 GST_SEGMENT_FORMAT, in_segment);
1068 } else if (in_segment->format != GST_FORMAT_TIME) {
1069 /* Unknown incoming segment format. Output a default open-ended
1071 gst_event_unref (event);
1073 out_segment.start = 0;
1074 out_segment.stop = GST_CLOCK_TIME_NONE;
1075 out_segment.time = 0;
1077 event = gst_event_new_segment (&out_segment);
1078 gst_event_set_seqnum (event, seqnum);
1082 /* not considered BYTE seekable if it is talking to us in TIME,
1083 * whatever else it might claim */
1084 parse->priv->upstream_seekable = FALSE;
1085 next_dts = in_segment->start;
1088 memcpy (&parse->segment, &out_segment, sizeof (GstSegment));
1091 gst_segment_set_newsegment (&parse->segment, update, rate,
1092 applied_rate, format, start, stop, start);
1095 /* save the segment for later, right before we push a new buffer so that
1096 * the caps are fixed and the next linked element can receive
1098 parse->priv->pending_segment = TRUE;
1101 /* but finish the current segment */
1102 GST_DEBUG_OBJECT (parse, "draining current segment");
1103 if (in_segment->rate > 0.0)
1104 gst_base_parse_drain (parse);
1106 gst_base_parse_finish_fragment (parse, FALSE);
1107 gst_adapter_clear (parse->priv->adapter);
1109 parse->priv->offset = offset;
1110 parse->priv->sync_offset = offset;
1111 parse->priv->next_dts = next_dts;
1112 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
1113 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1114 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1115 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
1116 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
1117 parse->priv->discont = TRUE;
1118 parse->priv->seen_keyframe = FALSE;
1122 case GST_EVENT_FLUSH_START:
1123 GST_OBJECT_LOCK (parse);
1124 parse->priv->flushing = TRUE;
1125 GST_OBJECT_UNLOCK (parse);
1128 case GST_EVENT_FLUSH_STOP:
1129 gst_adapter_clear (parse->priv->adapter);
1130 gst_base_parse_clear_queues (parse);
1131 parse->priv->flushing = FALSE;
1132 parse->priv->discont = TRUE;
1133 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
1134 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
1135 parse->priv->new_frame = TRUE;
1137 forward_immediate = TRUE;
1141 if (parse->segment.rate > 0.0)
1142 gst_base_parse_drain (parse);
1144 gst_base_parse_finish_fragment (parse, TRUE);
1146 /* If we STILL have zero frames processed, fire an error */
1147 if (parse->priv->framecount == 0) {
1148 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
1149 ("No valid frames found before end of stream"), (NULL));
1151 /* newsegment and other serialized events before eos */
1152 if (G_UNLIKELY (parse->priv->pending_events)) {
1155 for (l = parse->priv->pending_events; l != NULL; l = l->next) {
1156 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
1158 g_list_free (parse->priv->pending_events);
1159 parse->priv->pending_events = NULL;
1160 parse->priv->pending_segment = FALSE;
1162 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1163 /* We've not posted bitrate tags yet - do so now */
1164 gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
1166 forward_immediate = TRUE;
1168 case GST_EVENT_CUSTOM_DOWNSTREAM:{
1169 /* FIXME: Code duplicated from libgstvideo because core can't depend on -base */
1170 #ifndef GST_VIDEO_EVENT_STILL_STATE_NAME
1171 #define GST_VIDEO_EVENT_STILL_STATE_NAME "GstEventStillFrame"
1174 const GstStructure *s;
1175 gboolean ev_still_state;
1177 s = gst_event_get_structure (event);
1179 gst_structure_has_name (s, GST_VIDEO_EVENT_STILL_STATE_NAME) &&
1180 gst_structure_get_boolean (s, "still-state", &ev_still_state)) {
1181 if (ev_still_state) {
1182 GST_DEBUG_OBJECT (parse, "draining current data for still-frame");
1183 if (parse->segment.rate > 0.0)
1184 gst_base_parse_drain (parse);
1186 gst_base_parse_finish_fragment (parse, TRUE);
1188 forward_immediate = TRUE;
1194 GST_DEBUG_OBJECT (parse, "draining current data due to gap event");
1195 if (parse->segment.rate > 0.0)
1196 gst_base_parse_drain (parse);
1198 gst_base_parse_finish_fragment (parse, TRUE);
1199 forward_immediate = TRUE;
1203 /* See if any bitrate tags were posted */
1204 gst_base_parse_handle_tag (parse, event);
1207 case GST_EVENT_STREAM_START:
1208 if (parse->priv->pad_mode != GST_PAD_MODE_PULL)
1209 forward_immediate = TRUE;
1216 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
1217 * For EOS this is required because no buffer or serialized event
1218 * will come after EOS and nothing could trigger another
1219 * _finish_frame() call. *
1220 * If the subclass handles sending of EOS manually it can return
1221 * _DROPPED from ::finish() and all other subclasses should have
1222 * decoded/flushed all remaining data before this
1224 * For FLUSH_STOP this is required because it is expected
1225 * to be forwarded immediately and no buffers are queued anyway.
1228 if (!GST_EVENT_IS_SERIALIZED (event) || forward_immediate) {
1229 ret = gst_pad_push_event (parse->srcpad, event);
1231 // GST_VIDEO_DECODER_STREAM_LOCK (decoder);
1232 parse->priv->pending_events =
1233 g_list_prepend (parse->priv->pending_events, event);
1234 // GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
1239 GST_DEBUG_OBJECT (parse, "event handled");
1245 gst_base_parse_sink_query_default (GstBaseParse * parse, GstQuery * query)
1250 pad = GST_BASE_PARSE_SINK_PAD (parse);
1252 switch (GST_QUERY_TYPE (query)) {
1253 case GST_QUERY_CAPS:
1255 GstBaseParseClass *bclass;
1257 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1259 if (bclass->get_sink_caps) {
1260 GstCaps *caps, *filter;
1262 gst_query_parse_caps (query, &filter);
1263 caps = bclass->get_sink_caps (parse, filter);
1264 GST_LOG_OBJECT (parse, "sink getcaps returning caps %" GST_PTR_FORMAT,
1266 gst_query_set_caps_result (query, caps);
1267 gst_caps_unref (caps);
1271 GstCaps *caps, *template_caps, *filter;
1273 gst_query_parse_caps (query, &filter);
1274 template_caps = gst_pad_get_pad_template_caps (pad);
1275 if (filter != NULL) {
1277 gst_caps_intersect_full (filter, template_caps,
1278 GST_CAPS_INTERSECT_FIRST);
1279 gst_caps_unref (template_caps);
1281 caps = template_caps;
1283 gst_query_set_caps_result (query, caps);
1284 gst_caps_unref (caps);
1292 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
1301 gst_base_parse_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1303 GstBaseParseClass *bclass;
1304 GstBaseParse *parse;
1307 parse = GST_BASE_PARSE (parent);
1308 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1310 GST_DEBUG_OBJECT (parse, "%s query", GST_QUERY_TYPE_NAME (query));
1312 if (bclass->sink_query)
1313 ret = bclass->sink_query (parse, query);
1317 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1318 GST_QUERY_TYPE_NAME (query), ret, query);
1324 gst_base_parse_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1326 GstBaseParseClass *bclass;
1327 GstBaseParse *parse;
1330 parse = GST_BASE_PARSE (parent);
1331 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1333 GST_DEBUG_OBJECT (parse, "%s query: %" GST_PTR_FORMAT,
1334 GST_QUERY_TYPE_NAME (query), query);
1336 if (bclass->src_query)
1337 ret = bclass->src_query (parse, query);
1341 GST_LOG_OBJECT (parse, "%s query result: %d %" GST_PTR_FORMAT,
1342 GST_QUERY_TYPE_NAME (query), ret, query);
1347 /* gst_base_parse_src_event:
1348 * @pad: #GstPad that received the event.
1349 * @event: #GstEvent that was received.
1351 * Handler for source pad events.
1353 * Returns: TRUE if the event was handled.
1356 gst_base_parse_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1358 GstBaseParse *parse;
1359 GstBaseParseClass *bclass;
1360 gboolean ret = TRUE;
1362 parse = GST_BASE_PARSE (parent);
1363 bclass = GST_BASE_PARSE_GET_CLASS (parse);
1365 GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
1366 GST_EVENT_TYPE_NAME (event));
1368 if (bclass->src_event)
1369 ret = bclass->src_event (parse, event);
1371 gst_event_unref (event);
1377 gst_base_parse_is_seekable (GstBaseParse * parse)
1379 /* FIXME: could do more here, e.g. check index or just send data from 0
1380 * in pull mode and let decoder/sink clip */
1381 return parse->priv->syncable;
1384 /* gst_base_parse_src_event_default:
1385 * @parse: #GstBaseParse.
1386 * @event: #GstEvent that was received.
1388 * Default srcpad event handler.
1390 * Returns: TRUE if the event was handled and can be dropped.
1393 gst_base_parse_src_event_default (GstBaseParse * parse, GstEvent * event)
1395 gboolean res = FALSE;
1397 switch (GST_EVENT_TYPE (event)) {
1398 case GST_EVENT_SEEK:
1399 if (gst_base_parse_is_seekable (parse))
1400 res = gst_base_parse_handle_seek (parse, event);
1403 res = gst_pad_event_default (parse->srcpad, GST_OBJECT_CAST (parse),
1412 * gst_base_parse_convert_default:
1413 * @parse: #GstBaseParse.
1414 * @src_format: #GstFormat describing the source format.
1415 * @src_value: Source value to be converted.
1416 * @dest_format: #GstFormat defining the converted format.
1417 * @dest_value: Pointer where the conversion result will be put.
1419 * Default implementation of "convert" vmethod in #GstBaseParse class.
1421 * Returns: TRUE if conversion was successful.
1424 gst_base_parse_convert_default (GstBaseParse * parse,
1425 GstFormat src_format,
1426 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
1428 gboolean ret = FALSE;
1429 guint64 bytes, duration;
1431 if (G_UNLIKELY (src_format == dest_format)) {
1432 *dest_value = src_value;
1436 if (G_UNLIKELY (src_value == -1)) {
1441 if (G_UNLIKELY (src_value == 0)) {
1446 /* need at least some frames */
1447 if (!parse->priv->framecount)
1450 duration = parse->priv->acc_duration / GST_MSECOND;
1451 bytes = parse->priv->bytecount;
1453 if (G_UNLIKELY (!duration || !bytes))
1454 goto no_duration_bytes;
1456 if (src_format == GST_FORMAT_BYTES) {
1457 if (dest_format == GST_FORMAT_TIME) {
1458 /* BYTES -> TIME conversion */
1459 GST_DEBUG_OBJECT (parse, "converting bytes -> time");
1460 *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
1461 *dest_value *= GST_MSECOND;
1462 GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
1463 *dest_value / GST_MSECOND);
1466 GST_DEBUG_OBJECT (parse, "converting bytes -> other not implemented");
1468 } else if (src_format == GST_FORMAT_TIME) {
1469 if (dest_format == GST_FORMAT_BYTES) {
1470 GST_DEBUG_OBJECT (parse, "converting time -> bytes");
1471 *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
1473 GST_DEBUG_OBJECT (parse,
1474 "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
1475 src_value / GST_MSECOND, *dest_value);
1478 GST_DEBUG_OBJECT (parse, "converting time -> other not implemented");
1480 } else if (src_format == GST_FORMAT_DEFAULT) {
1481 /* DEFAULT == frame-based */
1482 if (dest_format == GST_FORMAT_TIME) {
1483 GST_DEBUG_OBJECT (parse, "converting default -> time");
1484 if (parse->priv->fps_den) {
1485 *dest_value = gst_util_uint64_scale (src_value,
1486 GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
1490 GST_DEBUG_OBJECT (parse, "converting default -> other not implemented");
1493 GST_DEBUG_OBJECT (parse, "conversion not implemented");
1500 GST_DEBUG_OBJECT (parse, "no framecount");
1505 GST_DEBUG_OBJECT (parse, "no duration %" G_GUINT64_FORMAT ", bytes %"
1506 G_GUINT64_FORMAT, duration, bytes);
1513 gst_base_parse_update_duration (GstBaseParse * baseparse)
1516 GstBaseParse *parse;
1518 parse = GST_BASE_PARSE (baseparse);
1520 peer = gst_pad_get_peer (parse->sinkpad);
1522 gboolean qres = FALSE;
1523 gint64 ptot, dest_value;
1525 qres = gst_pad_query_duration (peer, GST_FORMAT_BYTES, &ptot);
1526 gst_object_unref (GST_OBJECT (peer));
1528 if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, ptot,
1529 GST_FORMAT_TIME, &dest_value)) {
1531 /* inform if duration changed, but try to avoid spamming */
1532 parse->priv->estimated_drift +=
1533 dest_value - parse->priv->estimated_duration;
1534 if (parse->priv->estimated_drift > GST_SECOND ||
1535 parse->priv->estimated_drift < -GST_SECOND) {
1536 gst_element_post_message (GST_ELEMENT (parse),
1537 gst_message_new_duration_changed (GST_OBJECT (parse)));
1538 parse->priv->estimated_drift = 0;
1540 parse->priv->estimated_duration = dest_value;
1541 GST_LOG_OBJECT (parse,
1542 "updated estimated duration to %" GST_TIME_FORMAT,
1543 GST_TIME_ARGS (dest_value));
1550 gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
1551 gboolean post_avg, gboolean post_max)
1553 GstTagList *taglist = NULL;
1555 if (post_min && parse->priv->post_min_bitrate) {
1556 taglist = gst_tag_list_new_empty ();
1558 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1559 GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
1562 if (post_avg && parse->priv->post_avg_bitrate) {
1563 if (taglist == NULL)
1564 taglist = gst_tag_list_new_empty ();
1566 parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
1567 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
1568 parse->priv->avg_bitrate, NULL);
1571 if (post_max && parse->priv->post_max_bitrate) {
1572 if (taglist == NULL)
1573 taglist = gst_tag_list_new_empty ();
1575 gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
1576 GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
1579 GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
1580 parse->priv->min_bitrate, parse->priv->avg_bitrate,
1581 parse->priv->max_bitrate);
1583 if (taglist != NULL) {
1584 gst_pad_push_event (parse->srcpad, gst_event_new_tag (taglist));
1588 /* gst_base_parse_update_bitrates:
1589 * @parse: #GstBaseParse.
1590 * @buffer: Current frame as a #GstBuffer
1592 * Keeps track of the minimum and maximum bitrates, and also maintains a
1593 * running average bitrate of the stream so far.
1596 gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
1598 /* Only update the tag on a 10 kbps delta */
1599 static const gint update_threshold = 10000;
1601 guint64 data_len, frame_dur;
1602 gint overhead, frame_bitrate, old_avg_bitrate;
1603 gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
1604 GstBuffer *buffer = frame->buffer;
1606 overhead = frame->overhead;
1610 data_len = gst_buffer_get_size (buffer) - overhead;
1611 parse->priv->data_bytecount += data_len;
1613 /* duration should be valid by now,
1614 * either set by subclass or maybe based on fps settings */
1615 if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
1616 /* Calculate duration of a frame from buffer properties */
1617 frame_dur = GST_BUFFER_DURATION (buffer);
1618 parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
1619 parse->priv->acc_duration;
1622 /* No way to figure out frame duration (is this even possible?) */
1626 /* override if subclass provided bitrate, e.g. metadata based */
1627 if (parse->priv->bitrate) {
1628 parse->priv->avg_bitrate = parse->priv->bitrate;
1629 /* spread this (confirmed) info ASAP */
1630 if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
1631 gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
1635 frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
1639 GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
1640 parse->priv->avg_bitrate);
1642 if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
1644 } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
1645 /* always post all at threshold time */
1646 update_min = update_max = update_avg = TRUE;
1649 if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
1650 if (frame_bitrate < parse->priv->min_bitrate) {
1651 parse->priv->min_bitrate = frame_bitrate;
1655 if (frame_bitrate > parse->priv->max_bitrate) {
1656 parse->priv->max_bitrate = frame_bitrate;
1660 old_avg_bitrate = parse->priv->posted_avg_bitrate;
1661 if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
1662 || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
1667 if ((update_min || update_avg || update_max))
1668 gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
1675 * gst_base_parse_add_index_entry:
1676 * @parse: #GstBaseParse.
1677 * @offset: offset of entry
1678 * @ts: timestamp associated with offset
1679 * @key: whether entry refers to keyframe
1680 * @force: add entry disregarding sanity checks
1682 * Adds an entry to the index associating @offset to @ts. It is recommended
1683 * to only add keyframe entries. @force allows to bypass checks, such as
1684 * whether the stream is (upstream) seekable, another entry is already "close"
1685 * to the new entry, etc.
1687 * Returns: #gboolean indicating whether entry was added
1690 gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
1691 GstClockTime ts, gboolean key, gboolean force)
1693 gboolean ret = FALSE;
1694 GstIndexAssociation associations[2];
1696 GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
1697 " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
1699 if (G_LIKELY (!force)) {
1701 if (!parse->priv->upstream_seekable) {
1702 GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
1706 /* FIXME need better helper data structure that handles these issues
1707 * related to ongoing collecting of index entries */
1708 if (parse->priv->index_last_offset + parse->priv->idx_byte_interval >=
1710 GST_LOG_OBJECT (parse,
1711 "already have entries up to offset 0x%08" G_GINT64_MODIFIER "x",
1712 parse->priv->index_last_offset + parse->priv->idx_byte_interval);
1716 if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
1717 GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
1718 parse->priv->idx_interval) {
1719 GST_LOG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
1720 GST_TIME_ARGS (parse->priv->index_last_ts));
1724 /* if last is not really the last one */
1725 if (!parse->priv->index_last_valid) {
1726 GstClockTime prev_ts;
1728 gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
1729 if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
1730 GST_LOG_OBJECT (parse,
1731 "entry too close to existing entry %" GST_TIME_FORMAT,
1732 GST_TIME_ARGS (prev_ts));
1733 parse->priv->index_last_offset = offset;
1734 parse->priv->index_last_ts = ts;
1740 associations[0].format = GST_FORMAT_TIME;
1741 associations[0].value = ts;
1742 associations[1].format = GST_FORMAT_BYTES;
1743 associations[1].value = offset;
1745 /* index might change on-the-fly, although that would be nutty app ... */
1746 GST_BASE_PARSE_INDEX_LOCK (parse);
1747 gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
1748 (key) ? GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT :
1749 GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT, 2,
1750 (const GstIndexAssociation *) &associations);
1751 GST_BASE_PARSE_INDEX_UNLOCK (parse);
1754 parse->priv->index_last_offset = offset;
1755 parse->priv->index_last_ts = ts;
1764 /* check for seekable upstream, above and beyond a mere query */
1766 gst_base_parse_check_seekability (GstBaseParse * parse)
1769 gboolean seekable = FALSE;
1770 gint64 start = -1, stop = -1;
1771 guint idx_interval = 0;
1772 guint64 idx_byte_interval = 0;
1774 query = gst_query_new_seeking (GST_FORMAT_BYTES);
1775 if (!gst_pad_peer_query (parse->sinkpad, query)) {
1776 GST_DEBUG_OBJECT (parse, "seeking query failed");
1780 gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
1782 /* try harder to query upstream size if we didn't get it the first time */
1783 if (seekable && stop == -1) {
1784 GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
1785 gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_BYTES, &stop);
1788 /* if upstream doesn't know the size, it's likely that it's not seekable in
1789 * practice even if it technically may be seekable */
1790 if (seekable && (start != 0 || stop <= start)) {
1791 GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
1795 /* let's not put every single frame into our index */
1797 if (stop < 10 * 1024 * 1024)
1799 else if (stop < 100 * 1024 * 1024)
1802 idx_interval = 1000;
1804 /* ensure that even for large files (e.g. very long audio files), the index
1805 * stays reasonably-size, with some arbitrary limit to the total number of
1807 idx_byte_interval = (stop - start) / MAX_INDEX_ENTRIES;
1808 GST_DEBUG_OBJECT (parse,
1809 "Limiting index entries to %d, indexing byte interval %"
1810 G_GUINT64_FORMAT " bytes", MAX_INDEX_ENTRIES, idx_byte_interval);
1814 gst_query_unref (query);
1816 GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
1817 G_GUINT64_FORMAT ")", seekable, start, stop);
1818 parse->priv->upstream_seekable = seekable;
1819 parse->priv->upstream_size = seekable ? stop : 0;
1821 GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
1822 parse->priv->idx_interval = idx_interval * GST_MSECOND;
1823 parse->priv->idx_byte_interval = idx_byte_interval;
1826 /* some misc checks on upstream */
1828 gst_base_parse_check_upstream (GstBaseParse * parse)
1832 if (gst_pad_peer_query_duration (parse->sinkpad, GST_FORMAT_TIME, &stop))
1833 if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
1834 /* upstream has one, accept it also, and no further updates */
1835 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
1836 parse->priv->upstream_has_duration = TRUE;
1839 GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
1840 parse->priv->upstream_has_duration);
1843 /* checks src caps to determine if dealing with audio or video */
1844 /* TODO maybe forego automagic stuff and let subclass configure it ? */
1846 gst_base_parse_check_media (GstBaseParse * parse)
1851 caps = gst_pad_get_current_caps (parse->srcpad);
1852 if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
1853 parse->priv->is_video =
1854 g_str_has_prefix (gst_structure_get_name (s), "video");
1856 /* historical default */
1857 parse->priv->is_video = FALSE;
1860 gst_caps_unref (caps);
1862 GST_DEBUG_OBJECT (parse, "media is video: %d", parse->priv->is_video);
1865 /* takes ownership of frame */
1867 gst_base_parse_queue_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
1869 if (!(frame->_private_flags & GST_BASE_PARSE_FRAME_PRIVATE_FLAG_NOALLOC)) {
1870 /* frame allocated on the heap, we can just take ownership */
1871 g_queue_push_tail (&parse->priv->queued_frames, frame);
1872 GST_TRACE ("queued frame %p", frame);
1874 GstBaseParseFrame *copy;
1876 /* probably allocated on the stack, must make a proper copy */
1877 copy = gst_base_parse_frame_copy (frame);
1878 g_queue_push_tail (&parse->priv->queued_frames, copy);
1879 GST_TRACE ("queued frame %p (copy of %p)", copy, frame);
1880 gst_base_parse_frame_free (frame);
1884 /* makes sure that @buf is properly prepared and decorated for passing
1885 * to baseclass, and an equally setup frame is returned setup with @buf.
1886 * Takes ownership of @buf. */
1887 static GstBaseParseFrame *
1888 gst_base_parse_prepare_frame (GstBaseParse * parse, GstBuffer * buffer)
1890 GstBaseParseFrame *frame = NULL;
1892 buffer = gst_buffer_make_writable (buffer);
1894 GST_LOG_OBJECT (parse,
1895 "preparing frame at offset %" G_GUINT64_FORMAT
1896 " (%#" G_GINT64_MODIFIER "x) of size %" G_GSIZE_FORMAT,
1897 GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
1898 gst_buffer_get_size (buffer));
1900 if (parse->priv->discont) {
1901 GST_DEBUG_OBJECT (parse, "marking DISCONT");
1902 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1903 parse->priv->discont = FALSE;
1906 GST_BUFFER_OFFSET (buffer) = parse->priv->offset;
1908 frame = gst_base_parse_frame_new (buffer, 0, 0);
1910 /* also ensure to update state flags */
1911 gst_base_parse_frame_update (parse, frame, buffer);
1912 gst_buffer_unref (buffer);
1914 if (parse->priv->prev_offset != parse->priv->offset || parse->priv->new_frame) {
1915 GST_LOG_OBJECT (parse, "marking as new frame");
1916 parse->priv->new_frame = FALSE;
1917 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME;
1920 frame->offset = parse->priv->prev_offset = parse->priv->offset;
1922 /* use default handler to provide initial (upstream) metadata */
1923 gst_base_parse_parse_frame (parse, frame);
1928 /* Wraps buffer in a frame and dispatches to subclass.
1929 * Also manages data skipping and offset handling (including adapter flushing).
1930 * Takes ownership of @buffer */
1931 static GstFlowReturn
1932 gst_base_parse_handle_buffer (GstBaseParse * parse, GstBuffer * buffer,
1933 gint * skip, gint * flushed)
1935 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
1936 GstBaseParseFrame *frame;
1939 g_return_val_if_fail (skip != NULL || flushed != NULL, GST_FLOW_ERROR);
1941 GST_LOG_OBJECT (parse,
1942 "handling buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
1943 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1944 gst_buffer_get_size (buffer), GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
1945 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
1946 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1948 /* track what is being flushed during this single round of frame processing */
1949 parse->priv->flushed = 0;
1952 /* make it easy for _finish_frame to pick up input data */
1953 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
1954 gst_buffer_ref (buffer);
1955 gst_adapter_push (parse->priv->adapter, buffer);
1958 frame = gst_base_parse_prepare_frame (parse, buffer);
1959 ret = klass->handle_frame (parse, frame, skip);
1961 *flushed = parse->priv->flushed;
1963 GST_LOG_OBJECT (parse, "handle_frame skipped %d, flushed %d",
1966 /* subclass can only do one of these, or semantics are too unclear */
1967 g_assert (*skip == 0 || *flushed == 0);
1969 /* track skipping */
1971 GstClockTime pts, dts;
1974 GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", *skip);
1975 if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
1976 /* reverse playback, and no frames found yet, so we are skipping
1977 * the leading part of a fragment, which may form the tail of
1978 * fragment coming later, hopefully subclass skips efficiently ... */
1979 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
1980 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
1981 outbuf = gst_adapter_take_buffer (parse->priv->adapter, *skip);
1982 outbuf = gst_buffer_make_writable (outbuf);
1983 GST_BUFFER_PTS (outbuf) = pts;
1984 GST_BUFFER_DTS (outbuf) = dts;
1985 parse->priv->buffers_head =
1986 g_slist_prepend (parse->priv->buffers_head, outbuf);
1989 gst_adapter_flush (parse->priv->adapter, *skip);
1991 if (!parse->priv->discont)
1992 parse->priv->sync_offset = parse->priv->offset;
1993 parse->priv->offset += *skip;
1994 parse->priv->discont = TRUE;
1995 /* check for indefinite skipping */
1996 if (ret == GST_FLOW_OK)
1997 ret = gst_base_parse_check_sync (parse);
2000 parse->priv->offset += *flushed;
2002 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2003 gst_adapter_clear (parse->priv->adapter);
2006 gst_base_parse_frame_free (frame);
2011 /* gst_base_parse_handle_and_push_frame:
2012 * @parse: #GstBaseParse.
2013 * @klass: #GstBaseParseClass.
2014 * @frame: (transfer full): a #GstBaseParseFrame
2016 * Parses the frame from given buffer and pushes it forward. Also performs
2017 * timestamp handling and checks the segment limits.
2019 * This is called with srcpad STREAM_LOCK held.
2021 * Returns: #GstFlowReturn
2023 static GstFlowReturn
2024 gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
2025 GstBaseParseFrame * frame)
2030 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2032 buffer = frame->buffer;
2033 offset = frame->offset;
2035 /* check if subclass/format can provide ts.
2036 * If so, that allows and enables extra seek and duration determining options */
2037 if (G_UNLIKELY (parse->priv->first_frame_offset < 0)) {
2038 if (GST_BUFFER_PTS_IS_VALID (buffer) && parse->priv->has_timing_info
2039 && parse->priv->pad_mode == GST_PAD_MODE_PULL) {
2040 parse->priv->first_frame_offset = offset;
2041 parse->priv->first_frame_pts = GST_BUFFER_PTS (buffer);
2042 parse->priv->first_frame_dts = GST_BUFFER_DTS (buffer);
2043 GST_DEBUG_OBJECT (parse, "subclass provided dts %" GST_TIME_FORMAT
2044 ", pts %" GST_TIME_FORMAT " for first frame at offset %"
2045 G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->first_frame_dts),
2046 GST_TIME_ARGS (parse->priv->first_frame_pts),
2047 parse->priv->first_frame_offset);
2048 if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
2050 GstClockTime last_ts = G_MAXINT64;
2052 GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
2053 gst_base_parse_locate_time (parse, &last_ts, &off);
2054 if (GST_CLOCK_TIME_IS_VALID (last_ts))
2055 gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
2058 /* disable further checks */
2059 parse->priv->first_frame_offset = 0;
2063 /* track upstream time if provided, not subclass' internal notion of it */
2064 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2065 GST_BUFFER_PTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2066 GST_BUFFER_DTS (frame->buffer) = GST_CLOCK_TIME_NONE;
2069 /* interpolating and no valid pts yet,
2070 * start with dts and carry on from there */
2071 if (parse->priv->infer_ts && parse->priv->pts_interpolate
2072 && !GST_CLOCK_TIME_IS_VALID (parse->priv->next_pts))
2073 parse->priv->next_pts = parse->priv->next_dts;
2075 /* again use default handler to add missing metadata;
2076 * we may have new information on frame properties */
2077 gst_base_parse_parse_frame (parse, frame);
2079 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2080 if (GST_BUFFER_DTS_IS_VALID (buffer) && GST_BUFFER_DURATION_IS_VALID (buffer)) {
2081 parse->priv->next_dts =
2082 GST_BUFFER_DTS (buffer) + GST_BUFFER_DURATION (buffer);
2083 if (parse->priv->pts_interpolate && GST_BUFFER_PTS_IS_VALID (buffer)) {
2084 GstClockTime next_pts =
2085 GST_BUFFER_PTS (buffer) + GST_BUFFER_DURATION (buffer);
2086 if (next_pts >= parse->priv->next_dts)
2087 parse->priv->next_pts = next_pts;
2090 /* we lost track, do not produce bogus time next time around
2091 * (probably means parser subclass has given up on parsing as well) */
2092 GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
2093 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2096 if (parse->priv->upstream_seekable && parse->priv->exact_position &&
2097 GST_BUFFER_PTS_IS_VALID (buffer))
2098 gst_base_parse_add_index_entry (parse, offset,
2099 GST_BUFFER_PTS (buffer),
2100 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
2102 /* All OK, push queued frames if there are any */
2103 if (G_UNLIKELY (!g_queue_is_empty (&parse->priv->queued_frames))) {
2104 GstBaseParseFrame *queued_frame;
2106 while ((queued_frame = g_queue_pop_head (&parse->priv->queued_frames))) {
2107 gst_base_parse_push_frame (parse, queued_frame);
2111 return gst_base_parse_push_frame (parse, frame);
2115 * gst_base_parse_push_frame:
2116 * @parse: #GstBaseParse.
2117 * @frame: (transfer none): a #GstBaseParseFrame
2119 * Pushes the frame's buffer downstream, sends any pending events and
2120 * does some timestamp and segment handling. Takes ownership of
2121 * frame's buffer, though caller retains ownership of @frame.
2123 * This must be called with sinkpad STREAM_LOCK held.
2125 * Returns: #GstFlowReturn
2128 gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
2130 GstFlowReturn ret = GST_FLOW_OK;
2131 GstClockTime last_start = GST_CLOCK_TIME_NONE;
2132 GstClockTime last_stop = GST_CLOCK_TIME_NONE;
2133 GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
2137 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2138 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2140 GST_TRACE_OBJECT (parse, "pushing frame %p", frame);
2142 buffer = frame->buffer;
2144 GST_LOG_OBJECT (parse,
2145 "processing buffer of size %" G_GSIZE_FORMAT " with dts %" GST_TIME_FORMAT
2146 ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
2147 gst_buffer_get_size (buffer),
2148 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2149 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
2150 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
2153 parse->priv->bytecount += frame->size;
2154 if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
2155 parse->priv->framecount++;
2156 if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
2157 parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
2160 /* 0 means disabled */
2161 if (parse->priv->update_interval < 0)
2162 parse->priv->update_interval = 50;
2163 else if (parse->priv->update_interval > 0 &&
2164 (parse->priv->framecount % parse->priv->update_interval) == 0)
2165 gst_base_parse_update_duration (parse);
2167 if (GST_BUFFER_PTS_IS_VALID (buffer))
2168 last_start = last_stop = GST_BUFFER_PTS (buffer);
2169 if (last_start != GST_CLOCK_TIME_NONE
2170 && GST_BUFFER_DURATION_IS_VALID (buffer))
2171 last_stop = last_start + GST_BUFFER_DURATION (buffer);
2173 /* should have caps by now */
2174 if (!gst_pad_has_current_caps (parse->srcpad))
2177 if (G_UNLIKELY (parse->priv->pending_segment)) {
2178 /* have caps; check identity */
2179 gst_base_parse_check_media (parse);
2182 /* Push pending events, including SEGMENT events */
2183 if (G_UNLIKELY (parse->priv->pending_events)) {
2184 GList *r = g_list_reverse (parse->priv->pending_events);
2187 parse->priv->pending_events = NULL;
2188 for (l = r; l != NULL; l = l->next) {
2189 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
2192 parse->priv->pending_segment = FALSE;
2195 /* segment adjustment magic; only if we are running the whole show */
2196 if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
2197 (parse->priv->pad_mode == GST_PAD_MODE_PULL ||
2198 parse->priv->upstream_seekable)) {
2200 if (GST_CLOCK_TIME_IS_VALID (parse->segment.position) &&
2201 GST_CLOCK_TIME_IS_VALID (last_start)) {
2202 GstClockTimeDiff diff;
2204 /* only send newsegments with increasing start times,
2205 * otherwise if these go back and forth downstream (sinks) increase
2206 * accumulated time and running_time */
2207 diff = GST_CLOCK_DIFF (parse->segment.position, last_start);
2208 if (G_UNLIKELY (diff > 2 * GST_SECOND
2209 && last_start > parse->segment.start
2210 && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop)
2211 || last_start < parse->segment.stop))) {
2213 GST_DEBUG_OBJECT (parse,
2214 "Gap of %" G_GINT64_FORMAT " ns detected in stream " "(%"
2215 GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
2216 "Sending updated SEGMENT events", diff,
2217 GST_TIME_ARGS (parse->segment.position),
2218 GST_TIME_ARGS (last_start));
2220 /* skip gap FIXME */
2221 gst_pad_push_event (parse->srcpad,
2222 gst_event_new_segment (&parse->segment));
2224 parse->segment.position = last_start;
2229 /* update bitrates and optionally post corresponding tags
2230 * (following newsegment) */
2231 gst_base_parse_update_bitrates (parse, frame);
2233 if (klass->pre_push_frame) {
2234 ret = klass->pre_push_frame (parse, frame);
2236 frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
2239 /* take final ownership of frame buffer */
2240 if (frame->out_buffer) {
2241 buffer = frame->out_buffer;
2242 frame->out_buffer = NULL;
2243 gst_buffer_replace (&frame->buffer, NULL);
2245 buffer = frame->buffer;
2246 frame->buffer = NULL;
2249 /* subclass must play nice */
2250 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2252 size = gst_buffer_get_size (buffer);
2254 parse->priv->seen_keyframe |= parse->priv->is_video &&
2255 !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
2257 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
2258 if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2259 GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
2260 GST_BUFFER_TIMESTAMP (buffer) >
2261 parse->segment.stop + parse->priv->lead_out_ts) {
2262 GST_LOG_OBJECT (parse, "Dropped frame, after segment");
2264 } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
2265 GST_BUFFER_DURATION_IS_VALID (buffer) &&
2266 GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
2267 GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
2268 parse->priv->lead_in_ts < parse->segment.start) {
2269 if (parse->priv->seen_keyframe) {
2270 GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
2273 GST_LOG_OBJECT (parse, "Dropped frame, before segment");
2274 ret = GST_BASE_PARSE_FLOW_DROPPED;
2281 if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
2282 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) dropped", size);
2283 gst_buffer_unref (buffer);
2285 } else if (ret == GST_FLOW_OK) {
2286 if (parse->segment.rate > 0.0) {
2287 GST_LOG_OBJECT (parse, "pushing frame (%" G_GSIZE_FORMAT " bytes) now..",
2289 ret = gst_pad_push (parse->srcpad, buffer);
2290 GST_LOG_OBJECT (parse, "frame pushed, flow %s", gst_flow_get_name (ret));
2292 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) queued for now",
2294 parse->priv->buffers_queued =
2295 g_slist_prepend (parse->priv->buffers_queued, buffer);
2299 GST_LOG_OBJECT (parse, "frame (%" G_GSIZE_FORMAT " bytes) not pushed: %s",
2300 size, gst_flow_get_name (ret));
2301 gst_buffer_unref (buffer);
2302 /* if we are not sufficiently in control, let upstream decide on EOS */
2303 if (ret == GST_FLOW_EOS && !parse->priv->disable_passthrough &&
2304 (parse->priv->passthrough ||
2305 (parse->priv->pad_mode == GST_PAD_MODE_PUSH &&
2306 !parse->priv->upstream_seekable)))
2310 /* Update current running segment position */
2311 if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
2312 parse->segment.position < last_stop)
2313 parse->segment.position = last_stop;
2320 GST_ELEMENT_ERROR (parse, STREAM, DECODE, ("No caps set"), (NULL));
2321 return GST_FLOW_ERROR;
2326 * gst_base_parse_finish_frame:
2327 * @parse: a #GstBaseParse
2328 * @frame: a #GstBaseParseFrame
2329 * @size: consumed input data represented by frame
2331 * Collects parsed data and pushes this downstream.
2332 * Source pad caps must be set when this is called.
2334 * If @frame's out_buffer is set, that will be used as subsequent frame data.
2335 * Otherwise, @size samples will be taken from the input and used for output,
2336 * and the output's metadata (timestamps etc) will be taken as (optionally)
2337 * set by the subclass on @frame's (input) buffer (which is otherwise
2338 * ignored for any but the above purpose/information).
2340 * Note that the latter buffer is invalidated by this call, whereas the
2341 * caller retains ownership of @frame.
2343 * Returns: a #GstFlowReturn that should be escalated to caller (of caller)
2346 gst_base_parse_finish_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
2349 GstFlowReturn ret = GST_FLOW_OK;
2351 g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
2352 g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
2353 g_return_val_if_fail (size > 0 || frame->out_buffer, GST_FLOW_ERROR);
2354 g_return_val_if_fail (gst_adapter_available (parse->priv->adapter) >= size,
2357 GST_LOG_OBJECT (parse, "finished frame at offset %" G_GUINT64_FORMAT ", "
2358 "flushing size %d", frame->offset, size);
2360 /* some one-time start-up */
2361 if (G_UNLIKELY (parse->priv->framecount == 0)) {
2362 gst_base_parse_check_seekability (parse);
2363 gst_base_parse_check_upstream (parse);
2366 parse->priv->flushed += size;
2368 if (parse->priv->scanning && frame->buffer) {
2369 if (!parse->priv->scanned_frame) {
2370 parse->priv->scanned_frame = gst_base_parse_frame_copy (frame);
2375 /* either PUSH or PULL mode arranges for adapter data */
2376 /* ensure output buffer */
2377 if (!frame->out_buffer) {
2378 GstBuffer *src, *dest;
2380 frame->out_buffer = gst_adapter_take_buffer (parse->priv->adapter, size);
2381 dest = frame->out_buffer;
2382 src = frame->buffer;
2383 GST_BUFFER_PTS (dest) = GST_BUFFER_PTS (src);
2384 GST_BUFFER_DTS (dest) = GST_BUFFER_DTS (src);
2385 GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src);
2386 GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src);
2387 GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src);
2388 GST_MINI_OBJECT_FLAGS (dest) = GST_MINI_OBJECT_FLAGS (src);
2390 gst_adapter_flush (parse->priv->adapter, size);
2393 /* use as input for subsequent processing */
2394 gst_buffer_replace (&frame->buffer, frame->out_buffer);
2395 gst_buffer_unref (frame->out_buffer);
2396 frame->out_buffer = NULL;
2398 /* mark input size consumed */
2401 /* subclass might queue frames/data internally if it needs more
2402 * frames to decide on the format, or might request us to queue here. */
2403 if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_DROP) {
2404 gst_buffer_replace (&frame->buffer, NULL);
2406 } else if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_QUEUE) {
2407 GstBaseParseFrame *copy;
2409 copy = gst_base_parse_frame_copy (frame);
2410 copy->flags &= ~GST_BASE_PARSE_FRAME_FLAG_QUEUE;
2411 gst_base_parse_queue_frame (parse, copy);
2415 ret = gst_base_parse_handle_and_push_frame (parse, frame);
2421 /* gst_base_parse_drain:
2423 * Drains the adapter until it is empty. It decreases the min_frame_size to
2424 * match the current adapter size and calls chain method until the adapter
2425 * is emptied or chain returns with error.
2428 gst_base_parse_drain (GstBaseParse * parse)
2432 GST_DEBUG_OBJECT (parse, "draining");
2433 parse->priv->drain = TRUE;
2436 avail = gst_adapter_available (parse->priv->adapter);
2440 if (gst_base_parse_chain (parse->sinkpad, GST_OBJECT_CAST (parse),
2441 NULL) != GST_FLOW_OK) {
2445 /* nothing changed, maybe due to truncated frame; break infinite loop */
2446 if (avail == gst_adapter_available (parse->priv->adapter)) {
2447 GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
2448 gst_adapter_clear (parse->priv->adapter);
2452 parse->priv->drain = FALSE;
2455 /* gst_base_parse_send_buffers
2457 * Sends buffers collected in send_buffers downstream, and ensures that list
2458 * is empty at the end (errors or not).
2460 static GstFlowReturn
2461 gst_base_parse_send_buffers (GstBaseParse * parse)
2463 GSList *send = NULL;
2465 GstFlowReturn ret = GST_FLOW_OK;
2467 send = parse->priv->buffers_send;
2471 buf = GST_BUFFER_CAST (send->data);
2472 GST_LOG_OBJECT (parse, "pushing buffer %p, dts %"
2473 GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
2474 ", offset %" G_GINT64_FORMAT, buf,
2475 GST_TIME_ARGS (GST_BUFFER_DTS (buf)),
2476 GST_TIME_ARGS (GST_BUFFER_PTS (buf)),
2477 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
2479 /* iterate output queue an push downstream */
2480 ret = gst_pad_push (parse->srcpad, buf);
2481 send = g_slist_delete_link (send, send);
2483 /* clear any leftover if error */
2484 if (G_UNLIKELY (ret != GST_FLOW_OK)) {
2486 buf = GST_BUFFER_CAST (send->data);
2487 gst_buffer_unref (buf);
2488 send = g_slist_delete_link (send, send);
2493 parse->priv->buffers_send = send;
2498 /* gst_base_parse_start_fragment:
2500 * Prepares for processing a reverse playback (forward) fragment
2501 * by (re)setting proper state variables.
2503 static GstFlowReturn
2504 gst_base_parse_start_fragment (GstBaseParse * parse)
2506 GST_LOG_OBJECT (parse, "starting fragment");
2508 /* invalidate so no fall-back timestamping is performed;
2509 * ok if taken from subclass or upstream */
2510 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
2511 parse->priv->prev_pts = GST_CLOCK_TIME_NONE;
2512 parse->priv->next_dts = GST_CLOCK_TIME_NONE;
2513 parse->priv->prev_dts = GST_CLOCK_TIME_NONE;
2514 /* prevent it hanging around stop all the time */
2515 parse->segment.position = GST_CLOCK_TIME_NONE;
2517 parse->priv->discont = TRUE;
2519 /* head of previous fragment is now pending tail of current fragment */
2520 parse->priv->buffers_pending = parse->priv->buffers_head;
2521 parse->priv->buffers_head = NULL;
2527 /* gst_base_parse_finish_fragment:
2529 * Processes a reverse playback (forward) fragment:
2530 * - append head of last fragment that was skipped to current fragment data
2531 * - drain the resulting current fragment data (i.e. repeated chain)
2532 * - add time/duration (if needed) to frames queued by chain
2533 * - push queued data
2535 static GstFlowReturn
2536 gst_base_parse_finish_fragment (GstBaseParse * parse, gboolean prev_head)
2539 GstFlowReturn ret = GST_FLOW_OK;
2540 gboolean seen_key = FALSE, seen_delta = FALSE;
2542 GST_LOG_OBJECT (parse, "finishing fragment");
2545 parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
2546 while (parse->priv->buffers_pending) {
2547 buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
2549 GST_LOG_OBJECT (parse, "adding pending buffer (size %" G_GSIZE_FORMAT ")",
2550 gst_buffer_get_size (buf));
2551 gst_adapter_push (parse->priv->adapter, buf);
2553 GST_LOG_OBJECT (parse, "discarding head buffer");
2554 gst_buffer_unref (buf);
2556 parse->priv->buffers_pending =
2557 g_slist_delete_link (parse->priv->buffers_pending,
2558 parse->priv->buffers_pending);
2561 /* chain looks for frames and queues resulting ones (in stead of pushing) */
2562 /* initial skipped data is added to buffers_pending */
2563 gst_base_parse_drain (parse);
2565 if (parse->priv->buffers_send) {
2566 buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
2567 seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
2570 /* add metadata (if needed to queued buffers */
2571 GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
2572 GST_TIME_ARGS (parse->priv->last_pts));
2573 while (parse->priv->buffers_queued) {
2574 buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
2576 /* no touching if upstream or parsing provided time */
2577 if (GST_BUFFER_PTS_IS_VALID (buf)) {
2578 GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
2579 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2580 } else if (GST_BUFFER_DURATION_IS_VALID (buf)) {
2581 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_pts)) {
2582 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_pts))
2583 parse->priv->last_pts -= GST_BUFFER_DURATION (buf);
2585 parse->priv->last_pts = 0;
2586 GST_BUFFER_PTS (buf) = parse->priv->last_pts;
2587 GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
2588 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
2590 if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_dts)) {
2591 if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_dts))
2592 parse->priv->last_dts -= GST_BUFFER_DURATION (buf);
2594 parse->priv->last_dts = 0;
2595 GST_BUFFER_DTS (buf) = parse->priv->last_dts;
2596 GST_LOG_OBJECT (parse, "applied dts %" GST_TIME_FORMAT,
2597 GST_TIME_ARGS (GST_BUFFER_DTS (buf)));
2600 /* no idea, very bad */
2601 GST_WARNING_OBJECT (parse, "could not determine time for buffer");
2604 parse->priv->last_pts = GST_BUFFER_PTS (buf);
2605 parse->priv->last_dts = GST_BUFFER_DTS (buf);
2607 /* reverse order for ascending sending */
2608 /* send downstream at keyframe not preceded by a keyframe
2609 * (e.g. that should identify start of collection of IDR nals) */
2610 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
2612 ret = gst_base_parse_send_buffers (parse);
2613 /* if a problem, throw all to sending */
2614 if (ret != GST_FLOW_OK) {
2615 parse->priv->buffers_send =
2616 g_slist_reverse (parse->priv->buffers_queued);
2617 parse->priv->buffers_queued = NULL;
2627 parse->priv->buffers_send =
2628 g_slist_prepend (parse->priv->buffers_send, buf);
2629 parse->priv->buffers_queued =
2630 g_slist_delete_link (parse->priv->buffers_queued,
2631 parse->priv->buffers_queued);
2634 /* audio may have all marked as keyframe, so arrange to send here */
2636 ret = gst_base_parse_send_buffers (parse);
2638 /* any trailing unused no longer usable (ideally none) */
2639 if (G_UNLIKELY (gst_adapter_available (parse->priv->adapter))) {
2640 GST_DEBUG_OBJECT (parse, "discarding %" G_GSIZE_FORMAT " trailing bytes",
2641 gst_adapter_available (parse->priv->adapter));
2642 gst_adapter_clear (parse->priv->adapter);
2648 /* small helper that checks whether we have been trying to resync too long */
2649 static inline GstFlowReturn
2650 gst_base_parse_check_sync (GstBaseParse * parse)
2652 if (G_UNLIKELY (parse->priv->discont &&
2653 parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
2654 GST_ELEMENT_ERROR (parse, STREAM, DECODE,
2655 ("Failed to parse stream"), (NULL));
2656 return GST_FLOW_ERROR;
2662 static GstFlowReturn
2663 gst_base_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
2665 GstBaseParseClass *bclass;
2666 GstBaseParse *parse;
2667 GstFlowReturn ret = GST_FLOW_OK;
2668 GstBuffer *tmpbuf = NULL;
2673 GstClockTime pts, dts;
2675 parse = GST_BASE_PARSE (parent);
2676 bclass = GST_BASE_PARSE_GET_CLASS (parse);
2678 if (parse->priv->detecting) {
2679 GstBuffer *detect_buf;
2681 if (parse->priv->detect_buffers_size == 0) {
2682 detect_buf = gst_buffer_ref (buffer);
2687 detect_buf = gst_buffer_new ();
2689 for (l = parse->priv->detect_buffers; l; l = l->next) {
2690 gsize tmpsize = gst_buffer_get_size (l->data);
2692 gst_buffer_copy_into (detect_buf, GST_BUFFER_CAST (l->data),
2693 GST_BUFFER_COPY_MEMORY, offset, tmpsize);
2697 gst_buffer_copy_into (detect_buf, buffer, GST_BUFFER_COPY_MEMORY,
2698 offset, gst_buffer_get_size (buffer));
2701 ret = bclass->detect (parse, detect_buf);
2702 gst_buffer_unref (detect_buf);
2704 if (ret == GST_FLOW_OK) {
2707 /* Detected something */
2708 parse->priv->detecting = FALSE;
2710 for (l = parse->priv->detect_buffers; l; l = l->next) {
2711 if (ret == GST_FLOW_OK && !parse->priv->flushing)
2713 gst_base_parse_chain (GST_BASE_PARSE_SINK_PAD (parse),
2714 parent, GST_BUFFER_CAST (l->data));
2716 gst_buffer_unref (GST_BUFFER_CAST (l->data));
2718 g_list_free (parse->priv->detect_buffers);
2719 parse->priv->detect_buffers = NULL;
2720 parse->priv->detect_buffers_size = 0;
2722 if (ret != GST_FLOW_OK) {
2726 /* Handle the current buffer */
2727 } else if (ret == GST_FLOW_NOT_NEGOTIATED) {
2728 /* Still detecting, append buffer or error out if draining */
2730 if (parse->priv->drain) {
2731 GST_DEBUG_OBJECT (parse, "Draining but did not detect format yet");
2732 return GST_FLOW_ERROR;
2733 } else if (parse->priv->flushing) {
2734 g_list_foreach (parse->priv->detect_buffers, (GFunc) gst_buffer_unref,
2736 g_list_free (parse->priv->detect_buffers);
2737 parse->priv->detect_buffers = NULL;
2738 parse->priv->detect_buffers_size = 0;
2740 parse->priv->detect_buffers =
2741 g_list_append (parse->priv->detect_buffers, buffer);
2742 parse->priv->detect_buffers_size += gst_buffer_get_size (buffer);
2746 /* Something went wrong, subclass responsible for error reporting */
2750 /* And now handle the current buffer if detection worked */
2753 if (G_LIKELY (buffer)) {
2754 GST_LOG_OBJECT (parse,
2755 "buffer size: %" G_GSIZE_FORMAT ", offset = %" G_GINT64_FORMAT
2756 ", dts %" GST_TIME_FORMAT ", pts %" GST_TIME_FORMAT,
2757 gst_buffer_get_size (buffer), GST_BUFFER_OFFSET (buffer),
2758 GST_TIME_ARGS (GST_BUFFER_DTS (buffer)),
2759 GST_TIME_ARGS (GST_BUFFER_PTS (buffer)));
2761 if (G_UNLIKELY (!parse->priv->disable_passthrough
2762 && parse->priv->passthrough)) {
2763 GstBaseParseFrame frame;
2765 gst_base_parse_frame_init (&frame);
2766 frame.buffer = gst_buffer_make_writable (buffer);
2767 ret = gst_base_parse_push_frame (parse, &frame);
2768 gst_base_parse_frame_free (&frame);
2771 /* upstream feeding us in reverse playback;
2772 * finish previous fragment and start new upon DISCONT */
2773 if (parse->segment.rate < 0.0) {
2774 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
2775 GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
2776 ret = gst_base_parse_finish_fragment (parse, TRUE);
2777 gst_base_parse_start_fragment (parse);
2780 gst_adapter_push (parse->priv->adapter, buffer);
2783 /* Parse and push as many frames as possible */
2784 /* Stop either when adapter is empty or we are flushing */
2785 while (!parse->priv->flushing) {
2788 /* note: if subclass indicates MAX fsize,
2789 * this will not likely be available anyway ... */
2790 min_size = MAX (parse->priv->min_frame_size, fsize);
2791 av = gst_adapter_available (parse->priv->adapter);
2793 if (G_UNLIKELY (parse->priv->drain)) {
2795 GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
2796 if (G_UNLIKELY (!min_size)) {
2801 /* Collect at least min_frame_size bytes */
2802 if (av < min_size) {
2803 GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)", av);
2807 /* move along with upstream timestamp (if any),
2808 * but interpolate in between */
2809 pts = gst_adapter_prev_pts (parse->priv->adapter, NULL);
2810 dts = gst_adapter_prev_dts (parse->priv->adapter, NULL);
2811 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
2812 parse->priv->prev_pts = parse->priv->next_pts = pts;
2814 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
2815 parse->priv->prev_dts = parse->priv->next_dts = dts;
2817 /* we can mess with, erm interpolate, timestamps,
2818 * and incoming stuff has PTS but no DTS seen so far,
2819 * then pick up DTS from PTS and hope for the best ... */
2820 if (parse->priv->infer_ts &&
2821 parse->priv->pts_interpolate &&
2822 !GST_CLOCK_TIME_IS_VALID (dts) &&
2823 !GST_CLOCK_TIME_IS_VALID (parse->priv->prev_dts) &&
2824 GST_CLOCK_TIME_IS_VALID (pts))
2825 parse->priv->next_dts = pts;
2827 /* always pass all available data */
2828 data = gst_adapter_map (parse->priv->adapter, av);
2829 /* arrange for actual data to be copied if subclass tries to,
2830 * since what is passed is tied to the adapter */
2831 tmpbuf = gst_buffer_new_wrapped_full (GST_MEMORY_FLAG_READONLY |
2832 GST_MEMORY_FLAG_NO_SHARE, (gpointer) data, av, 0, av, NULL, NULL);
2834 /* already inform subclass what timestamps we have planned,
2835 * at least if provided by time-based upstream */
2836 if (parse->priv->upstream_format == GST_FORMAT_TIME) {
2837 GST_BUFFER_PTS (tmpbuf) = parse->priv->next_pts;
2838 GST_BUFFER_DTS (tmpbuf) = parse->priv->next_dts;
2841 /* keep the adapter mapped, so keep track of what has to be flushed */
2842 ret = gst_base_parse_handle_buffer (parse, tmpbuf, &skip, &flush);
2845 /* probably already implicitly unmapped due to adapter operation,
2846 * but for good measure ... */
2847 gst_adapter_unmap (parse->priv->adapter);
2848 if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED) {
2851 if (skip == 0 && flush == 0) {
2852 GST_LOG_OBJECT (parse, "nothing skipped and no frames finished, "
2853 "breaking to get more data");
2859 GST_LOG_OBJECT (parse, "chain leaving");
2863 /* pull @size bytes at current offset,
2864 * i.e. at least try to and possibly return a shorter buffer if near the end */
2865 static GstFlowReturn
2866 gst_base_parse_pull_range (GstBaseParse * parse, guint size,
2867 GstBuffer ** buffer)
2869 GstFlowReturn ret = GST_FLOW_OK;
2871 g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
2873 /* Caching here actually makes much less difference than one would expect.
2874 * We do it mainly to avoid pulling buffers of 1 byte all the time */
2875 if (parse->priv->cache) {
2876 gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
2877 gint cache_size = gst_buffer_get_size (parse->priv->cache);
2879 if (cache_offset <= parse->priv->offset &&
2880 (parse->priv->offset + size) <= (cache_offset + cache_size)) {
2881 *buffer = gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL,
2882 parse->priv->offset - cache_offset, size);
2883 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2886 /* not enough data in the cache, free cache and get a new one */
2887 gst_buffer_unref (parse->priv->cache);
2888 parse->priv->cache = NULL;
2891 /* refill the cache */
2893 gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
2894 64 * 1024), &parse->priv->cache);
2895 if (ret != GST_FLOW_OK) {
2896 parse->priv->cache = NULL;
2900 if (gst_buffer_get_size (parse->priv->cache) >= size) {
2902 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0,
2904 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2908 /* Not possible to get enough data, try a last time with
2909 * requesting exactly the size we need */
2910 gst_buffer_unref (parse->priv->cache);
2911 parse->priv->cache = NULL;
2913 ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
2914 &parse->priv->cache);
2916 if (ret != GST_FLOW_OK) {
2917 GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
2922 if (gst_buffer_get_size (parse->priv->cache) < size) {
2923 GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
2924 G_GUINT64_FORMAT ": wanted %u bytes, got %" G_GSIZE_FORMAT " bytes",
2925 parse->priv->offset, size, gst_buffer_get_size (parse->priv->cache));
2927 *buffer = parse->priv->cache;
2928 parse->priv->cache = NULL;
2934 gst_buffer_copy_region (parse->priv->cache, GST_BUFFER_COPY_ALL, 0, size);
2935 GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
2940 static GstFlowReturn
2941 gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
2944 GstClockTime ts = 0;
2948 GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
2949 ", last_offset = %" G_GINT64_FORMAT,
2950 GST_TIME_ARGS (parse->priv->last_pts), parse->priv->last_offset);
2952 if (!parse->priv->last_offset
2953 || parse->priv->last_pts <= parse->segment.start) {
2954 GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
2955 GST_TIME_ARGS (parse->segment.start));
2960 /* last fragment started at last_offset / last_ts;
2961 * seek back 10s capped at 1MB */
2962 if (parse->priv->last_pts >= 10 * GST_SECOND)
2963 ts = parse->priv->last_pts - 10 * GST_SECOND;
2964 /* if we are exact now, we will be more so going backwards */
2965 if (parse->priv->exact_position) {
2966 offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
2968 if (!gst_base_parse_convert (parse, GST_FORMAT_TIME, ts,
2969 GST_FORMAT_BYTES, &offset)) {
2970 GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
2973 offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
2974 parse->priv->last_offset - 1024);
2975 offset = MAX (0, offset);
2977 GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
2979 parse->priv->offset = offset;
2981 ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
2983 if (ret != GST_FLOW_OK)
2986 /* offset will increase again as fragment is processed/parsed */
2987 parse->priv->last_offset = offset;
2989 gst_base_parse_start_fragment (parse);
2990 gst_adapter_push (parse->priv->adapter, buffer);
2991 ret = gst_base_parse_finish_fragment (parse, TRUE);
2992 if (ret != GST_FLOW_OK)
2995 /* force previous fragment */
2996 parse->priv->offset = -1;
3003 * pull and scan for next frame starting from current offset
3004 * ajusts sync, drain and offset going along */
3005 static GstFlowReturn
3006 gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass)
3009 GstFlowReturn ret = GST_FLOW_OK;
3010 guint fsize, min_size;
3014 GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
3015 " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
3017 /* let's make this efficient for all subclass once and for all;
3018 * maybe it does not need this much, but in the latter case, we know we are
3019 * in pull mode here and might as well try to read and supply more anyway
3020 * (so does the buffer caching mechanism) */
3024 min_size = MAX (parse->priv->min_frame_size, fsize);
3026 GST_LOG_OBJECT (parse, "reading buffer size %u", min_size);
3028 ret = gst_base_parse_pull_range (parse, min_size, &buffer);
3029 if (ret != GST_FLOW_OK)
3032 /* if we got a short read, inform subclass we are draining leftover
3033 * and no more is to be expected */
3034 if (gst_buffer_get_size (buffer) < min_size) {
3035 GST_LOG_OBJECT (parse, "... but did not get that; marked draining");
3036 parse->priv->drain = TRUE;
3039 if (parse->priv->detecting) {
3040 ret = klass->detect (parse, buffer);
3041 if (ret == GST_FLOW_NOT_NEGOTIATED) {
3042 /* If draining we error out, otherwise request a buffer
3044 if (parse->priv->drain) {
3045 gst_buffer_unref (buffer);
3046 GST_ERROR_OBJECT (parse, "Failed to detect format but draining");
3047 return GST_FLOW_ERROR;
3050 gst_buffer_unref (buffer);
3053 } else if (ret != GST_FLOW_OK) {
3054 gst_buffer_unref (buffer);
3055 GST_ERROR_OBJECT (parse, "detect() returned %s",
3056 gst_flow_get_name (ret));
3060 /* Else handle this buffer normally */
3063 ret = gst_base_parse_handle_buffer (parse, buffer, &skip, &flushed);
3064 if (ret != GST_FLOW_OK)
3067 /* something flushed means something happened,
3068 * and we should bail out of this loop so as not to occupy
3069 * the task thread indefinitely */
3071 GST_LOG_OBJECT (parse, "frame finished, breaking loop");
3074 /* nothing flushed, no skip and draining, so nothing left to do */
3075 if (!skip && parse->priv->drain) {
3076 GST_LOG_OBJECT (parse, "no activity or result when draining; "
3077 "breaking loop and marking EOS");
3081 /* otherwise, get some more data
3082 * note that is checked this does not happen indefinitely */
3084 GST_LOG_OBJECT (parse, "getting some more data");
3087 parse->priv->drain = FALSE;
3094 /* Loop that is used in pull mode to retrieve data from upstream */
3096 gst_base_parse_loop (GstPad * pad)
3098 GstBaseParse *parse;
3099 GstBaseParseClass *klass;
3100 GstFlowReturn ret = GST_FLOW_OK;
3102 parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
3103 klass = GST_BASE_PARSE_GET_CLASS (parse);
3105 GST_LOG_OBJECT (parse, "Entering parse loop");
3107 if (G_UNLIKELY (parse->priv->push_stream_start)) {
3112 gst_pad_create_stream_id (parse->srcpad, GST_ELEMENT_CAST (parse),
3115 event = gst_event_new_stream_start (stream_id);
3116 gst_event_set_group_id (event, gst_util_group_id_next ());
3118 GST_DEBUG_OBJECT (parse, "Pushing STREAM_START");
3119 gst_pad_push_event (parse->srcpad, event);
3120 parse->priv->push_stream_start = FALSE;
3124 /* reverse playback:
3125 * first fragment (closest to stop time) is handled normally below,
3126 * then we pull in fragments going backwards */
3127 if (parse->segment.rate < 0.0) {
3128 /* check if we jumped back to a previous fragment,
3129 * which is a post-first fragment */
3130 if (parse->priv->offset < 0) {
3131 ret = gst_base_parse_handle_previous_fragment (parse);
3136 ret = gst_base_parse_scan_frame (parse, klass);
3137 if (ret != GST_FLOW_OK)
3140 /* eat expected eos signalling past segment in reverse playback */
3141 if (parse->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
3142 parse->segment.position >= parse->segment.stop) {
3143 GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
3144 /* push what was accumulated during loop run */
3145 gst_base_parse_finish_fragment (parse, FALSE);
3146 /* force previous fragment */
3147 parse->priv->offset = -1;
3152 if (ret == GST_FLOW_EOS)
3154 else if (ret != GST_FLOW_OK)
3157 gst_object_unref (parse);
3164 GST_DEBUG_OBJECT (parse, "eos");
3169 gboolean push_eos = FALSE;
3171 GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
3172 gst_flow_get_name (ret));
3173 gst_pad_pause_task (parse->sinkpad);
3175 if (ret == GST_FLOW_EOS) {
3176 /* handle end-of-stream/segment */
3177 if (parse->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
3180 if ((stop = parse->segment.stop) == -1)
3181 stop = parse->segment.duration;
3183 GST_DEBUG_OBJECT (parse, "sending segment_done");
3185 gst_element_post_message
3186 (GST_ELEMENT_CAST (parse),
3187 gst_message_new_segment_done (GST_OBJECT_CAST (parse),
3188 GST_FORMAT_TIME, stop));
3189 gst_pad_push_event (parse->srcpad,
3190 gst_event_new_segment_done (GST_FORMAT_TIME, stop));
3192 /* If we STILL have zero frames processed, fire an error */
3193 if (parse->priv->framecount == 0) {
3194 GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
3195 ("No valid frames found before end of stream"), (NULL));
3199 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
3200 /* for fatal errors we post an error message, wrong-state is
3201 * not fatal because it happens due to flushes and only means
3202 * that we should stop now. */
3203 GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
3204 ("streaming stopped, reason %s", gst_flow_get_name (ret)));
3208 /* Push pending events, including SEGMENT events */
3209 if (G_UNLIKELY (parse->priv->pending_events)) {
3210 GList *r = g_list_reverse (parse->priv->pending_events);
3213 parse->priv->pending_events = NULL;
3214 for (l = r; l != NULL; l = l->next) {
3215 gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
3218 parse->priv->pending_segment = FALSE;
3221 gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
3223 gst_object_unref (parse);
3228 gst_base_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
3230 GstSchedulingFlags sched_flags;
3231 GstBaseParse *parse;
3235 parse = GST_BASE_PARSE (parent);
3237 GST_DEBUG_OBJECT (parse, "sink activate");
3239 query = gst_query_new_scheduling ();
3240 if (!gst_pad_peer_query (sinkpad, query)) {
3241 gst_query_unref (query);
3242 goto baseparse_push;
3245 gst_query_parse_scheduling (query, &sched_flags, NULL, NULL, NULL);
3247 pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL)
3248 && ((sched_flags & GST_SCHEDULING_FLAG_SEEKABLE) != 0);
3250 gst_query_unref (query);
3253 goto baseparse_push;
3255 GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
3256 if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
3257 goto baseparse_push;
3259 parse->priv->push_stream_start = TRUE;
3261 return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_base_parse_loop,
3266 GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
3267 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
3272 gst_base_parse_activate (GstBaseParse * parse, gboolean active)
3274 GstBaseParseClass *klass;
3275 gboolean result = TRUE;
3277 GST_DEBUG_OBJECT (parse, "activate %d", active);
3279 klass = GST_BASE_PARSE_GET_CLASS (parse);
3282 if (parse->priv->pad_mode == GST_PAD_MODE_NONE && klass->start)
3283 result = klass->start (parse);
3285 /* If the subclass implements ::detect we want to
3286 * call it for the first buffers now */
3287 parse->priv->detecting = (klass->detect != NULL);
3289 /* We must make sure streaming has finished before resetting things
3290 * and calling the ::stop vfunc */
3291 GST_PAD_STREAM_LOCK (parse->sinkpad);
3292 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
3294 if (parse->priv->pad_mode != GST_PAD_MODE_NONE && klass->stop)
3295 result = klass->stop (parse);
3297 parse->priv->pad_mode = GST_PAD_MODE_NONE;
3299 GST_DEBUG_OBJECT (parse, "activate return: %d", result);
3304 gst_base_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
3305 GstPadMode mode, gboolean active)
3308 GstBaseParse *parse;
3310 parse = GST_BASE_PARSE (parent);
3312 GST_DEBUG_OBJECT (parse, "sink %sactivate in %s mode",
3313 (active) ? "" : "de", gst_pad_mode_get_name (mode));
3315 if (!gst_base_parse_activate (parse, active))
3316 goto activate_failed;
3319 case GST_PAD_MODE_PULL:
3321 parse->priv->pending_events =
3322 g_list_prepend (parse->priv->pending_events,
3323 gst_event_new_segment (&parse->segment));
3324 parse->priv->pending_segment = TRUE;
3327 result = gst_pad_stop_task (pad);
3335 parse->priv->pad_mode = active ? mode : GST_PAD_MODE_NONE;
3337 GST_DEBUG_OBJECT (parse, "sink activate return: %d", result);
3344 GST_DEBUG_OBJECT (parse, "activate failed");
3350 * gst_base_parse_set_duration:
3351 * @parse: #GstBaseParse.
3353 * @duration: duration value.
3354 * @interval: how often to update the duration estimate based on bitrate, or 0.
3356 * Sets the duration of the currently playing media. Subclass can use this
3357 * when it is able to determine duration and/or notices a change in the media
3358 * duration. Alternatively, if @interval is non-zero (default), then stream
3359 * duration is determined based on estimated bitrate, and updated every @interval
3363 gst_base_parse_set_duration (GstBaseParse * parse,
3364 GstFormat fmt, gint64 duration, gint interval)
3366 g_return_if_fail (parse != NULL);
3368 if (parse->priv->upstream_has_duration) {
3369 GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
3373 if (duration != parse->priv->duration) {
3376 m = gst_message_new_duration_changed (GST_OBJECT (parse));
3377 gst_element_post_message (GST_ELEMENT (parse), m);
3379 /* TODO: what about duration tag? */
3381 parse->priv->duration = duration;
3382 parse->priv->duration_fmt = fmt;
3383 GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
3384 if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
3385 if (interval != 0) {
3386 GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
3390 GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
3391 parse->priv->update_interval = interval;
3397 * gst_base_parse_set_average_bitrate:
3398 * @parse: #GstBaseParse.
3399 * @bitrate: average bitrate in bits/second
3401 * Optionally sets the average bitrate detected in media (if non-zero),
3402 * e.g. based on metadata, as it will be posted to the application.
3404 * By default, announced average bitrate is estimated. The average bitrate
3405 * is used to estimate the total duration of the stream and to estimate
3406 * a seek position, if there's no index and the format is syncable
3407 * (see gst_base_parse_set_syncable()).
3410 gst_base_parse_set_average_bitrate (GstBaseParse * parse, guint bitrate)
3412 parse->priv->bitrate = bitrate;
3413 GST_DEBUG_OBJECT (parse, "bitrate %u", bitrate);
3417 * gst_base_parse_set_min_frame_size:
3418 * @parse: #GstBaseParse.
3419 * @min_size: Minimum size of the data that this base class should give to
3422 * Subclass can use this function to tell the base class that it needs to
3423 * give at least #min_size buffers.
3426 gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
3428 g_return_if_fail (parse != NULL);
3430 parse->priv->min_frame_size = min_size;
3431 GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
3435 * gst_base_parse_set_frame_rate:
3436 * @parse: the #GstBaseParse to set
3437 * @fps_num: frames per second (numerator).
3438 * @fps_den: frames per second (denominator).
3439 * @lead_in: frames needed before a segment for subsequent decode
3440 * @lead_out: frames needed after a segment
3442 * If frames per second is configured, parser can take care of buffer duration
3443 * and timestamping. When performing segment clipping, or seeking to a specific
3444 * location, a corresponding decoder might need an initial @lead_in and a
3445 * following @lead_out number of frames to ensure the desired segment is
3446 * entirely filled upon decoding.
3449 gst_base_parse_set_frame_rate (GstBaseParse * parse, guint fps_num,
3450 guint fps_den, guint lead_in, guint lead_out)
3452 g_return_if_fail (parse != NULL);
3454 parse->priv->fps_num = fps_num;
3455 parse->priv->fps_den = fps_den;
3456 if (!fps_num || !fps_den) {
3457 GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
3459 fps_num = fps_den = 0;
3460 parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
3461 parse->priv->lead_in = parse->priv->lead_out = 0;
3462 parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
3464 parse->priv->frame_duration =
3465 gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
3466 parse->priv->lead_in = lead_in;
3467 parse->priv->lead_out = lead_out;
3468 parse->priv->lead_in_ts =
3469 gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
3470 parse->priv->lead_out_ts =
3471 gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
3472 /* aim for about 1.5s to estimate duration */
3473 if (parse->priv->update_interval < 0) {
3474 parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
3475 GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
3476 parse->priv->update_interval);
3479 GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
3480 fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
3481 GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
3482 "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
3483 lead_in, parse->priv->lead_in_ts / GST_MSECOND,
3484 lead_out, parse->priv->lead_out_ts / GST_MSECOND);
3488 * gst_base_parse_set_has_timing_info:
3489 * @parse: a #GstBaseParse
3490 * @has_timing: whether frames carry timing information
3492 * Set if frames carry timing information which the subclass can (generally)
3493 * parse and provide. In particular, intrinsic (rather than estimated) time
3494 * can be obtained following a seek.
3497 gst_base_parse_set_has_timing_info (GstBaseParse * parse, gboolean has_timing)
3499 parse->priv->has_timing_info = has_timing;
3500 GST_INFO_OBJECT (parse, "has_timing: %s", (has_timing) ? "yes" : "no");
3504 * gst_base_parse_set_syncable:
3505 * @parse: a #GstBaseParse
3506 * @syncable: set if frame starts can be identified
3508 * Set if frame starts can be identified. This is set by default and
3509 * determines whether seeking based on bitrate averages
3510 * is possible for a format/stream.
3513 gst_base_parse_set_syncable (GstBaseParse * parse, gboolean syncable)
3515 parse->priv->syncable = syncable;
3516 GST_INFO_OBJECT (parse, "syncable: %s", (syncable) ? "yes" : "no");
3520 * gst_base_parse_set_passthrough:
3521 * @parse: a #GstBaseParse
3522 * @passthrough: %TRUE if parser should run in passthrough mode
3524 * Set if the nature of the format or configuration does not allow (much)
3525 * parsing, and the parser should operate in passthrough mode (which only
3526 * applies when operating in push mode). That is, incoming buffers are
3527 * pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
3528 * callbacks will be invoked, but @pre_push_frame will still be invoked,
3529 * so subclass can perform as much or as little is appropriate for
3530 * passthrough semantics in @pre_push_frame.
3533 gst_base_parse_set_passthrough (GstBaseParse * parse, gboolean passthrough)
3535 parse->priv->passthrough = passthrough;
3536 GST_INFO_OBJECT (parse, "passthrough: %s", (passthrough) ? "yes" : "no");
3540 * gst_base_parse_set_pts_interpolation:
3541 * @parse: a #GstBaseParse
3542 * @pts_interpolate: %TRUE if parser should interpolate PTS timestamps
3544 * By default, the base class will guess PTS timestamps using a simple
3545 * interpolation (previous timestamp + duration), which is incorrect for
3546 * data streams with reordering, where PTS can go backward. Sub-classes
3547 * implementing such formats should disable PTS interpolation.
3550 gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
3551 gboolean pts_interpolate)
3553 parse->priv->pts_interpolate = pts_interpolate;
3554 GST_INFO_OBJECT (parse, "PTS interpolation: %s",
3555 (pts_interpolate) ? "yes" : "no");
3559 * gst_base_parse_set_infer_ts:
3560 * @parse: a #GstBaseParse
3561 * @infer_ts: %TRUE if parser should infer DTS/PTS from each other
3563 * By default, the base class might try to infer PTS from DTS and vice
3564 * versa. While this is generally correct for audio data, it may not
3565 * be otherwise. Sub-classes implementing such formats should disable
3566 * timestamp infering.
3569 gst_base_parse_set_infer_ts (GstBaseParse * parse, gboolean infer_ts)
3571 parse->priv->infer_ts = infer_ts;
3572 GST_INFO_OBJECT (parse, "TS inferring: %s", (infer_ts) ? "yes" : "no");
3576 * gst_base_parse_set_latency:
3577 * @parse: a #GstBaseParse
3578 * @min_latency: minimum parse latency
3579 * @max_latency: maximum parse latency
3581 * Sets the minimum and maximum (which may likely be equal) latency introduced
3582 * by the parsing process. If there is such a latency, which depends on the
3583 * particular parsing of the format, it typically corresponds to 1 frame duration.
3586 gst_base_parse_set_latency (GstBaseParse * parse, GstClockTime min_latency,
3587 GstClockTime max_latency)
3589 GST_OBJECT_LOCK (parse);
3590 parse->priv->min_latency = min_latency;
3591 parse->priv->max_latency = max_latency;
3592 GST_OBJECT_UNLOCK (parse);
3593 GST_INFO_OBJECT (parse, "min/max latency %" GST_TIME_FORMAT ", %"
3594 GST_TIME_FORMAT, GST_TIME_ARGS (min_latency),
3595 GST_TIME_ARGS (max_latency));
3599 gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
3600 GstClockTime * duration)
3602 gboolean res = FALSE;
3604 g_return_val_if_fail (duration != NULL, FALSE);
3606 *duration = GST_CLOCK_TIME_NONE;
3607 if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
3608 GST_LOG_OBJECT (parse, "using provided duration");
3609 *duration = parse->priv->duration;
3611 } else if (parse->priv->duration != -1) {
3612 GST_LOG_OBJECT (parse, "converting provided duration");
3613 res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
3614 parse->priv->duration, format, (gint64 *) duration);
3615 } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
3616 GST_LOG_OBJECT (parse, "using estimated duration");
3617 *duration = parse->priv->estimated_duration;
3620 GST_LOG_OBJECT (parse, "cannot estimate duration");
3623 GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
3624 GST_TIME_ARGS (*duration));
3629 gst_base_parse_src_query_default (GstBaseParse * parse, GstQuery * query)
3631 gboolean res = FALSE;
3634 pad = GST_BASE_PARSE_SRC_PAD (parse);
3636 switch (GST_QUERY_TYPE (query)) {
3637 case GST_QUERY_POSITION:
3642 GST_DEBUG_OBJECT (parse, "position query");
3643 gst_query_parse_position (query, &format, NULL);
3645 /* try upstream first */
3646 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3648 /* Fall back on interpreting segment */
3649 GST_OBJECT_LOCK (parse);
3650 if (format == GST_FORMAT_BYTES) {
3651 dest_value = parse->priv->offset;
3653 } else if (format == parse->segment.format &&
3654 GST_CLOCK_TIME_IS_VALID (parse->segment.position)) {
3655 dest_value = gst_segment_to_stream_time (&parse->segment,
3656 parse->segment.format, parse->segment.position);
3659 GST_OBJECT_UNLOCK (parse);
3661 /* no precise result, upstream no idea either, then best estimate */
3662 /* priv->offset is updated in both PUSH/PULL modes */
3663 res = gst_base_parse_convert (parse,
3664 GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
3667 gst_query_set_position (query, format, dest_value);
3671 case GST_QUERY_DURATION:
3674 GstClockTime duration;
3676 GST_DEBUG_OBJECT (parse, "duration query");
3677 gst_query_parse_duration (query, &format, NULL);
3679 /* consult upstream */
3680 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3682 /* otherwise best estimate from us */
3684 res = gst_base_parse_get_duration (parse, format, &duration);
3686 gst_query_set_duration (query, format, duration);
3690 case GST_QUERY_SEEKING:
3693 GstClockTime duration = GST_CLOCK_TIME_NONE;
3694 gboolean seekable = FALSE;
3696 GST_DEBUG_OBJECT (parse, "seeking query");
3697 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
3699 /* consult upstream */
3700 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3702 /* we may be able to help if in TIME */
3703 if (fmt == GST_FORMAT_TIME && gst_base_parse_is_seekable (parse)) {
3704 gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
3705 /* already OK if upstream takes care */
3706 GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
3708 if (!(res && seekable)) {
3709 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
3710 || duration == -1) {
3711 /* seekable if we still have a chance to get duration later on */
3713 parse->priv->upstream_seekable && parse->priv->update_interval;
3715 seekable = parse->priv->upstream_seekable;
3716 GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
3719 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
3725 case GST_QUERY_FORMATS:
3726 gst_query_set_formatsv (query, 3, fmtlist);
3729 case GST_QUERY_CONVERT:
3731 GstFormat src_format, dest_format;
3732 gint64 src_value, dest_value;
3734 gst_query_parse_convert (query, &src_format, &src_value,
3735 &dest_format, &dest_value);
3737 res = gst_base_parse_convert (parse, src_format, src_value,
3738 dest_format, &dest_value);
3740 gst_query_set_convert (query, src_format, src_value,
3741 dest_format, dest_value);
3745 case GST_QUERY_LATENCY:
3747 if ((res = gst_pad_peer_query (parse->sinkpad, query))) {
3749 GstClockTime min_latency, max_latency;
3751 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
3752 GST_DEBUG_OBJECT (parse, "Peer latency: live %d, min %"
3753 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
3754 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
3756 GST_OBJECT_LOCK (parse);
3757 /* add our latency */
3758 if (min_latency != -1)
3759 min_latency += parse->priv->min_latency;
3760 if (max_latency != -1)
3761 max_latency += parse->priv->max_latency;
3762 GST_OBJECT_UNLOCK (parse);
3764 gst_query_set_latency (query, live, min_latency, max_latency);
3768 case GST_QUERY_SEGMENT:
3773 format = parse->segment.format;
3776 gst_segment_to_stream_time (&parse->segment, format,
3777 parse->segment.start);
3778 if ((stop = parse->segment.stop) == -1)
3779 stop = parse->segment.duration;
3781 stop = gst_segment_to_stream_time (&parse->segment, format, stop);
3783 gst_query_set_segment (query, parse->segment.rate, format, start, stop);
3788 res = gst_pad_query_default (pad, GST_OBJECT_CAST (parse), query);
3794 /* scans for a cluster start from @pos,
3795 * return GST_FLOW_OK and frame position/time in @pos/@time if found */
3796 static GstFlowReturn
3797 gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
3798 GstClockTime * time, GstClockTime * duration)
3800 GstBaseParseClass *klass;
3802 gboolean orig_drain, orig_discont;
3803 GstFlowReturn ret = GST_FLOW_OK;
3804 GstBuffer *buf = NULL;
3805 GstBaseParseFrame *sframe = NULL;
3807 g_return_val_if_fail (pos != NULL, GST_FLOW_ERROR);
3808 g_return_val_if_fail (time != NULL, GST_FLOW_ERROR);
3809 g_return_val_if_fail (duration != NULL, GST_FLOW_ERROR);
3811 klass = GST_BASE_PARSE_GET_CLASS (parse);
3813 *time = GST_CLOCK_TIME_NONE;
3814 *duration = GST_CLOCK_TIME_NONE;
3817 orig_offset = parse->priv->offset;
3818 orig_discont = parse->priv->discont;
3819 orig_drain = parse->priv->drain;
3821 GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
3822 " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
3824 /* jump elsewhere and locate next frame */
3825 parse->priv->offset = *pos;
3826 /* mark as scanning so frames don't get processed all the way */
3827 parse->priv->scanning = TRUE;
3828 ret = gst_base_parse_scan_frame (parse, klass);
3829 parse->priv->scanning = FALSE;
3830 /* retrieve frame found during scan */
3831 sframe = parse->priv->scanned_frame;
3832 parse->priv->scanned_frame = NULL;
3834 if (ret != GST_FLOW_OK || !sframe)
3837 /* get offset first, subclass parsing might dump other stuff in there */
3838 *pos = sframe->offset;
3839 buf = sframe->buffer;
3842 /* but it should provide proper time */
3843 *time = GST_BUFFER_TIMESTAMP (buf);
3844 *duration = GST_BUFFER_DURATION (buf);
3846 GST_LOG_OBJECT (parse,
3847 "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
3848 GST_TIME_ARGS (*time), *pos);
3852 gst_base_parse_frame_free (sframe);
3855 parse->priv->offset = orig_offset;
3856 parse->priv->discont = orig_discont;
3857 parse->priv->drain = orig_drain;
3862 /* bisect and scan through file for frame starting before @time,
3863 * returns OK and @time/@offset if found, NONE and/or error otherwise
3864 * If @time == G_MAXINT64, scan for duration ( == last frame) */
3865 static GstFlowReturn
3866 gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
3869 GstFlowReturn ret = GST_FLOW_OK;
3870 gint64 lpos, hpos, newpos;
3871 GstClockTime time, ltime, htime, newtime, dur;
3872 gboolean cont = TRUE;
3873 const GstClockTime tolerance = TARGET_DIFFERENCE;
3874 const guint chunk = 4 * 1024;
3876 g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
3877 g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
3879 GST_DEBUG_OBJECT (parse, "Bisecting for time %" GST_TIME_FORMAT,
3880 GST_TIME_ARGS (*_time));
3882 /* TODO also make keyframe aware if useful some day */
3897 /* do not know at first */
3899 *_time = GST_CLOCK_TIME_NONE;
3901 /* need initial positions; start and end */
3902 lpos = parse->priv->first_frame_offset;
3903 ltime = parse->priv->first_frame_pts;
3904 /* try other one if no luck */
3905 if (!GST_CLOCK_TIME_IS_VALID (ltime))
3906 ltime = parse->priv->first_frame_dts;
3907 if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &htime)) {
3908 GST_DEBUG_OBJECT (parse, "Unknown time duration, cannot bisect");
3909 return GST_FLOW_ERROR;
3911 hpos = parse->priv->upstream_size;
3913 GST_DEBUG_OBJECT (parse,
3914 "Bisection initial bounds: bytes %" G_GINT64_FORMAT " %" G_GINT64_FORMAT
3915 ", times %" GST_TIME_FORMAT " %" GST_TIME_FORMAT, lpos, hpos,
3916 GST_TIME_ARGS (ltime), GST_TIME_ARGS (htime));
3918 /* check preconditions are satisfied;
3919 * start and end are needed, except for special case where we scan for
3920 * last frame to determine duration */
3921 if (parse->priv->pad_mode != GST_PAD_MODE_PULL || !hpos ||
3922 !GST_CLOCK_TIME_IS_VALID (ltime) ||
3923 (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
3927 /* shortcut cases */
3930 } else if (time < ltime + tolerance) {
3934 } else if (time >= htime) {
3940 while (htime > ltime && cont) {
3941 GST_LOG_OBJECT (parse,
3942 "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
3943 GST_TIME_ARGS (ltime));
3944 GST_LOG_OBJECT (parse,
3945 "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
3946 GST_TIME_ARGS (htime));
3947 if (G_UNLIKELY (time == G_MAXINT64)) {
3949 } else if (G_LIKELY (hpos > lpos)) {
3951 gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
3954 /* should mean lpos == hpos, since lpos <= hpos is invariant */
3956 /* we check this case once, but not forever, so break loop */
3961 newpos = CLAMP (newpos, lpos, hpos);
3962 GST_LOG_OBJECT (parse,
3963 "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
3964 GST_TIME_ARGS (time), newpos);
3966 ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
3967 if (ret == GST_FLOW_EOS) {
3968 /* heuristic HACK */
3969 hpos = MAX (lpos, hpos - chunk);
3971 } else if (ret != GST_FLOW_OK) {
3975 if (newtime == -1 || newpos == -1) {
3976 GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
3980 if (G_UNLIKELY (time == G_MAXINT64)) {
3983 if (GST_CLOCK_TIME_IS_VALID (dur))
3986 } else if (newtime > time) {
3988 hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
3990 } else if (newtime + tolerance > time) {
3991 /* close enough undershoot */
3995 } else if (newtime < ltime) {
3996 /* so a position beyond lpos resulted in earlier time than ltime ... */
3997 GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
4000 /* undershoot too far */
4001 newpos += newpos == lpos ? chunk : 0;
4002 lpos = CLAMP (newpos, lpos, hpos);
4008 GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
4009 GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
4014 gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
4015 gboolean before, GstClockTime * _ts)
4017 gint64 bytes = 0, ts = 0;
4018 GstIndexEntry *entry = NULL;
4020 if (time == GST_CLOCK_TIME_NONE) {
4026 GST_BASE_PARSE_INDEX_LOCK (parse);
4027 if (parse->priv->index) {
4028 /* Let's check if we have an index entry for that time */
4029 entry = gst_index_get_assoc_entry (parse->priv->index,
4030 parse->priv->index_id,
4031 before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
4032 GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
4036 gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
4037 gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
4039 GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
4040 " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
4041 GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
4043 GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
4044 GST_TIME_ARGS (time));
4047 ts = GST_CLOCK_TIME_NONE;
4050 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4059 /* returns TRUE if seek succeeded */
4061 gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
4066 GstSeekType start_type = GST_SEEK_TYPE_NONE, stop_type;
4067 gboolean flush, update, res = TRUE, accurate;
4068 gint64 start, stop, seekpos, seekstop;
4069 GstSegment seeksegment = { 0, };
4070 GstClockTime start_ts;
4072 GstEvent *segment_event;
4074 /* try upstream first, unless we're driving the streaming thread ourselves */
4075 if (parse->priv->pad_mode != GST_PAD_MODE_PULL) {
4076 res = gst_pad_push_event (parse->sinkpad, gst_event_ref (event));
4081 gst_event_parse_seek (event, &rate, &format, &flags,
4082 &start_type, &start, &stop_type, &stop);
4083 seqnum = gst_event_get_seqnum (event);
4085 GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
4086 "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
4087 GST_TIME_FORMAT, gst_format_get_name (format), rate,
4088 start_type, GST_TIME_ARGS (start), stop_type, GST_TIME_ARGS (stop));
4090 /* we can only handle TIME, so check if subclass can convert
4091 * to TIME format if it's some other format (such as DEFAULT) */
4092 if (format != GST_FORMAT_TIME) {
4093 if (!gst_base_parse_convert (parse, format, start, GST_FORMAT_TIME, &start)
4094 || !gst_base_parse_convert (parse, format, stop, GST_FORMAT_TIME,
4096 goto no_convert_to_time;
4098 GST_INFO_OBJECT (parse, "converted %s format to start time "
4099 "%" GST_TIME_FORMAT " and stop time %" GST_TIME_FORMAT,
4100 gst_format_get_name (format), GST_TIME_ARGS (start),
4101 GST_TIME_ARGS (stop));
4103 format = GST_FORMAT_TIME;
4106 /* no negative rates in push mode (unless upstream takes care of that, but
4107 * we've already tried upstream and it didn't handle the seek request) */
4108 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PUSH)
4111 if (rate < 0.0 && parse->priv->pad_mode == GST_PAD_MODE_PULL)
4112 goto negative_rate_pull_mode;
4114 if (start_type != GST_SEEK_TYPE_SET ||
4115 (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
4118 /* get flush flag */
4119 flush = flags & GST_SEEK_FLAG_FLUSH;
4121 /* copy segment, we need this because we still need the old
4122 * segment when we close the current segment. */
4123 gst_segment_copy_into (&parse->segment, &seeksegment);
4125 GST_DEBUG_OBJECT (parse, "configuring seek");
4126 gst_segment_do_seek (&seeksegment, rate, format, flags,
4127 start_type, start, stop_type, stop, &update);
4129 /* accurate seeking implies seek tables are used to obtain position,
4130 * and the requested segment is maintained exactly, not adjusted any way */
4131 accurate = flags & GST_SEEK_FLAG_ACCURATE;
4133 /* maybe we can be accurate for (almost) free */
4134 gst_base_parse_find_offset (parse, seeksegment.position, TRUE, &start_ts);
4135 if (seeksegment.position <= start_ts + TARGET_DIFFERENCE) {
4136 GST_DEBUG_OBJECT (parse, "accurate seek possible");
4140 GstClockTime startpos = seeksegment.position;
4142 /* accurate requested, so ... seek a bit before target */
4143 if (startpos < parse->priv->lead_in_ts)
4146 startpos -= parse->priv->lead_in_ts;
4147 seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
4148 seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
4151 start_ts = seeksegment.position;
4152 if (!gst_base_parse_convert (parse, format, seeksegment.position,
4153 GST_FORMAT_BYTES, &seekpos))
4154 goto convert_failed;
4155 if (!gst_base_parse_convert (parse, format, seeksegment.stop,
4156 GST_FORMAT_BYTES, &seekstop))
4157 goto convert_failed;
4160 GST_DEBUG_OBJECT (parse,
4161 "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4163 GST_DEBUG_OBJECT (parse,
4164 "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
4165 seeksegment.stop, seekstop);
4167 if (parse->priv->pad_mode == GST_PAD_MODE_PULL) {
4170 GST_DEBUG_OBJECT (parse, "seek in PULL mode");
4173 if (parse->srcpad) {
4174 GstEvent *fevent = gst_event_new_flush_start ();
4175 GST_DEBUG_OBJECT (parse, "sending flush start");
4177 gst_event_set_seqnum (fevent, seqnum);
4179 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4180 /* unlock upstream pull_range */
4181 gst_pad_push_event (parse->sinkpad, fevent);
4184 gst_pad_pause_task (parse->sinkpad);
4187 /* we should now be able to grab the streaming thread because we stopped it
4188 * with the above flush/pause code */
4189 GST_PAD_STREAM_LOCK (parse->sinkpad);
4191 /* save current position */
4192 last_stop = parse->segment.position;
4193 GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
4196 /* now commit to new position */
4198 /* prepare for streaming again */
4200 GstEvent *fevent = gst_event_new_flush_stop (TRUE);
4201 GST_DEBUG_OBJECT (parse, "sending flush stop");
4202 gst_event_set_seqnum (fevent, seqnum);
4203 gst_pad_push_event (parse->srcpad, gst_event_ref (fevent));
4204 gst_pad_push_event (parse->sinkpad, fevent);
4205 gst_base_parse_clear_queues (parse);
4207 /* keep track of our position */
4208 seeksegment.base = gst_segment_to_running_time (&seeksegment,
4209 seeksegment.format, parse->segment.position);
4212 memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
4214 /* store the newsegment event so it can be sent from the streaming thread. */
4215 /* This will be sent later in _loop() */
4216 parse->priv->pending_segment = TRUE;
4217 segment_event = gst_event_new_segment (&parse->segment);
4218 gst_event_set_seqnum (segment_event, seqnum);
4219 parse->priv->pending_events =
4220 g_list_prepend (parse->priv->pending_events, segment_event);
4222 GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
4223 "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
4224 ", time = %" GST_TIME_FORMAT, format,
4225 GST_TIME_ARGS (parse->segment.start),
4226 GST_TIME_ARGS (parse->segment.stop),
4227 GST_TIME_ARGS (parse->segment.time));
4229 /* one last chance in pull mode to stay accurate;
4230 * maybe scan and subclass can find where to go */
4233 GstClockTime ts = seeksegment.position;
4235 gst_base_parse_locate_time (parse, &ts, &scanpos);
4239 /* running collected index now consists of several intervals,
4240 * so optimized check no longer possible */
4241 parse->priv->index_last_valid = FALSE;
4242 parse->priv->index_last_offset = 0;
4243 parse->priv->index_last_ts = 0;
4247 /* mark discont if we are going to stream from another position. */
4248 if (seekpos != parse->priv->offset) {
4249 GST_DEBUG_OBJECT (parse,
4250 "mark DISCONT, we did a seek to another position");
4251 parse->priv->offset = seekpos;
4252 parse->priv->last_offset = seekpos;
4253 parse->priv->seen_keyframe = FALSE;
4254 parse->priv->discont = TRUE;
4255 parse->priv->next_dts = start_ts;
4256 parse->priv->next_pts = GST_CLOCK_TIME_NONE;
4257 parse->priv->last_dts = GST_CLOCK_TIME_NONE;
4258 parse->priv->last_pts = GST_CLOCK_TIME_NONE;
4259 parse->priv->sync_offset = seekpos;
4260 parse->priv->exact_position = accurate;
4263 /* Start streaming thread if paused */
4264 gst_pad_start_task (parse->sinkpad,
4265 (GstTaskFunction) gst_base_parse_loop, parse->sinkpad, NULL);
4267 GST_PAD_STREAM_UNLOCK (parse->sinkpad);
4272 GstEvent *new_event;
4273 GstBaseParseSeek *seek;
4274 GstSeekFlags flags = (flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE);
4276 /* The only thing we need to do in PUSH-mode is to send the
4277 seek event (in bytes) to upstream. Segment / flush handling happens
4278 in corresponding src event handlers */
4279 GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
4280 if (seekstop >= 0 && seekstop <= seekpos)
4282 new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
4283 GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
4284 gst_event_set_seqnum (new_event, seqnum);
4286 /* store segment info so its precise details can be reconstructed when
4287 * receiving newsegment;
4288 * this matters for all details when accurate seeking,
4289 * is most useful to preserve NONE stop time otherwise */
4290 seek = g_new0 (GstBaseParseSeek, 1);
4291 seek->segment = seeksegment;
4292 seek->accurate = accurate;
4293 seek->offset = seekpos;
4294 seek->start_ts = start_ts;
4295 GST_OBJECT_LOCK (parse);
4296 /* less optimal, but preserves order */
4297 parse->priv->pending_seeks =
4298 g_slist_append (parse->priv->pending_seeks, seek);
4299 GST_OBJECT_UNLOCK (parse);
4301 res = gst_pad_push_event (parse->sinkpad, new_event);
4304 GST_OBJECT_LOCK (parse);
4305 parse->priv->pending_seeks =
4306 g_slist_remove (parse->priv->pending_seeks, seek);
4307 GST_OBJECT_UNLOCK (parse);
4313 gst_event_unref (event);
4317 negative_rate_pull_mode:
4319 GST_FIXME_OBJECT (parse, "negative playback in pull mode needs fixing");
4325 GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
4331 GST_DEBUG_OBJECT (parse, "unsupported seek type.");
4337 GST_DEBUG_OBJECT (parse, "seek in %s format was requested, but subclass "
4338 "couldn't convert that into TIME format", gst_format_get_name (format));
4344 GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
4350 /* Checks if bitrates are available from upstream tags so that we don't
4351 * override them later
4354 gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
4356 GstTagList *taglist = NULL;
4359 gst_event_parse_tag (event, &taglist);
4361 /* We only care about stream tags here */
4362 if (gst_tag_list_get_scope (taglist) != GST_TAG_SCOPE_STREAM)
4365 if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
4366 GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
4367 parse->priv->post_min_bitrate = FALSE;
4369 if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
4370 GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
4371 parse->priv->post_avg_bitrate = FALSE;
4373 if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
4374 GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
4375 parse->priv->post_max_bitrate = FALSE;
4381 gst_base_parse_set_index (GstElement * element, GstIndex * index)
4383 GstBaseParse *parse = GST_BASE_PARSE (element);
4385 GST_BASE_PARSE_INDEX_LOCK (parse);
4386 if (parse->priv->index)
4387 gst_object_unref (parse->priv->index);
4389 parse->priv->index = gst_object_ref (index);
4390 gst_index_get_writer_id (index, GST_OBJECT_CAST (element),
4391 &parse->priv->index_id);
4392 parse->priv->own_index = FALSE;
4394 parse->priv->index = NULL;
4396 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4400 gst_base_parse_get_index (GstElement * element)
4402 GstBaseParse *parse = GST_BASE_PARSE (element);
4403 GstIndex *result = NULL;
4405 GST_BASE_PARSE_INDEX_LOCK (parse);
4406 if (parse->priv->index)
4407 result = gst_object_ref (parse->priv->index);
4408 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4414 static GstStateChangeReturn
4415 gst_base_parse_change_state (GstElement * element, GstStateChange transition)
4417 GstBaseParse *parse;
4418 GstStateChangeReturn result;
4420 parse = GST_BASE_PARSE (element);
4422 switch (transition) {
4423 case GST_STATE_CHANGE_READY_TO_PAUSED:
4424 /* If this is our own index destroy it as the
4425 * old entries might be wrong for the new stream */
4426 GST_BASE_PARSE_INDEX_LOCK (parse);
4427 if (parse->priv->own_index) {
4428 gst_object_unref (parse->priv->index);
4429 parse->priv->index = NULL;
4430 parse->priv->own_index = FALSE;
4433 /* If no index was created, generate one */
4434 if (G_UNLIKELY (!parse->priv->index)) {
4435 GST_DEBUG_OBJECT (parse, "no index provided creating our own");
4437 parse->priv->index = g_object_new (gst_mem_index_get_type (), NULL);
4438 gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
4439 &parse->priv->index_id);
4440 parse->priv->own_index = TRUE;
4442 GST_BASE_PARSE_INDEX_UNLOCK (parse);
4448 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4450 switch (transition) {
4451 case GST_STATE_CHANGE_PAUSED_TO_READY:
4452 gst_base_parse_reset (parse);
4462 * gst_base_parse_set_ts_at_offset:
4463 * @parse: a #GstBaseParse
4464 * @offset: offset into current buffer
4466 * This function should only be called from a @handle_frame implementation.
4468 * GstBaseParse creates initial timestamps for frames by using the last
4469 * timestamp seen in the stream before the frame starts. In certain
4470 * cases, the correct timestamps will occur in the stream after the
4471 * start of the frame, but before the start of the actual picture data.
4472 * This function can be used to set the timestamps based on the offset
4473 * into the frame data that the picture starts.
4478 gst_base_parse_set_ts_at_offset (GstBaseParse * parse, gsize offset)
4480 GstClockTime pts, dts;
4482 g_return_if_fail (GST_IS_BASE_PARSE (parse));
4483 g_return_if_fail (offset >= 0);
4485 pts = gst_adapter_prev_pts_at_offset (parse->priv->adapter, offset, NULL);
4486 dts = gst_adapter_prev_dts_at_offset (parse->priv->adapter, offset, NULL);
4488 if (!GST_CLOCK_TIME_IS_VALID (pts) || !GST_CLOCK_TIME_IS_VALID (dts)) {
4489 GST_DEBUG_OBJECT (parse,
4490 "offset adapter timestamps dts=%" GST_TIME_FORMAT " pts=%"
4491 GST_TIME_FORMAT, GST_TIME_ARGS (dts), GST_TIME_ARGS (pts));
4493 if (GST_CLOCK_TIME_IS_VALID (pts) && (parse->priv->prev_pts != pts))
4494 parse->priv->prev_pts = parse->priv->next_pts = pts;
4496 if (GST_CLOCK_TIME_IS_VALID (dts) && (parse->priv->prev_dts != dts))
4497 parse->priv->prev_dts = parse->priv->next_dts = dts;