2 * Copyright (C) 2005-2007 Wim Taymans <wim.taymans@gmail.com>
4 * gstbasesink.c: Base class for sink elements
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
24 * @short_description: Base class for sink elements
25 * @see_also: #GstBaseTransform, #GstBaseSrc
27 * #GstBaseSink is the base class for sink elements in GStreamer, such as
28 * xvimagesink or filesink. It is a layer on top of #GstElement that provides a
29 * simplified interface to plugin writers. #GstBaseSink handles many details
30 * for you, for example: preroll, clock synchronization, state changes,
31 * activation in push or pull mode, and queries.
33 * In most cases, when writing sink elements, there is no need to implement
34 * class methods from #GstElement or to set functions on pads, because the
35 * #GstBaseSink infrastructure should be sufficient.
37 * #GstBaseSink provides support for exactly one sink pad, which should be
38 * named "sink". A sink implementation (subclass of #GstBaseSink) should
39 * install a pad template in its base_init function, like so:
42 * my_element_base_init (gpointer g_class)
44 * GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
46 * // sinktemplate should be a #GstStaticPadTemplate with direction
47 * // #GST_PAD_SINK and name "sink"
48 * gst_element_class_add_pad_template (gstelement_class,
49 * gst_static_pad_template_get (&sinktemplate));
50 * // see #GstElementDetails
51 * gst_element_class_set_details (gstelement_class, &details);
55 * #GstBaseSink will handle the prerolling correctly. This means that it will
56 * return #GST_STATE_CHANGE_ASYNC from a state change to PAUSED until the first
57 * buffer arrives in this element. The base class will call the
58 * #GstBaseSinkClass.preroll() vmethod with this preroll buffer and will then
59 * commit the state change to the next asynchronously pending state.
61 * When the element is set to PLAYING, #GstBaseSink will synchronise on the
62 * clock using the times returned from #GstBaseSinkClass.get_times(). If this
63 * function returns #GST_CLOCK_TIME_NONE for the start time, no synchronisation
64 * will be done. Synchronisation can be disabled entirely by setting the object
65 * #GstBaseSink:sync property to %FALSE.
67 * After synchronisation the virtual method #GstBaseSinkClass.render() will be
68 * called. Subclasses should minimally implement this method.
70 * Since 0.10.3 subclasses that synchronise on the clock in the
71 * #GstBaseSinkClass.render() method are supported as well. These classes
72 * typically receive a buffer in the render method and can then potentially
73 * block on the clock while rendering. A typical example is an audiosink.
74 * Since 0.10.11 these subclasses can use gst_base_sink_wait_preroll() to
75 * perform the blocking wait.
77 * Upon receiving the EOS event in the PLAYING state, #GstBaseSink will wait
78 * for the clock to reach the time indicated by the stop time of the last
79 * #GstBaseSinkClass.get_times() call before posting an EOS message. When the
80 * element receives EOS in PAUSED, preroll completes, the event is queued and an
81 * EOS message is posted when going to PLAYING.
83 * #GstBaseSink will internally use the #GST_EVENT_NEWSEGMENT events to schedule
84 * synchronisation and clipping of buffers. Buffers that fall completely outside
85 * of the current segment are dropped. Buffers that fall partially in the
86 * segment are rendered (and prerolled). Subclasses should do any subbuffer
87 * clipping themselves when needed.
89 * #GstBaseSink will by default report the current playback position in
90 * #GST_FORMAT_TIME based on the current clock time and segment information.
91 * If no clock has been set on the element, the query will be forwarded
94 * The #GstBaseSinkClass.set_caps() function will be called when the subclass
95 * should configure itself to process a specific media type.
97 * The #GstBaseSinkClass.start() and #GstBaseSinkClass.stop() virtual methods
98 * will be called when resources should be allocated. Any
99 * #GstBaseSinkClass.preroll(), #GstBaseSinkClass.render() and
100 * #GstBaseSinkClass.set_caps() function will be called between the
101 * #GstBaseSinkClass.start() and #GstBaseSinkClass.stop() calls.
103 * The #GstBaseSinkClass.event() virtual method will be called when an event is
104 * received by #GstBaseSink. Normally this method should only be overriden by
105 * very specific elements (such as file sinks) which need to handle the
106 * newsegment event specially.
108 * #GstBaseSink provides an overridable #GstBaseSinkClass.buffer_alloc()
109 * function that can be used by sinks that want to do reverse negotiation or to
110 * provide custom buffers (hardware buffers for example) to upstream elements.
112 * The #GstBaseSinkClass.unlock() method is called when the elements should
113 * unblock any blocking operations they perform in the
114 * #GstBaseSinkClass.render() method. This is mostly useful when the
115 * #GstBaseSinkClass.render() method performs a blocking write on a file
116 * descriptor, for example.
118 * The #GstBaseSink:max-lateness property affects how the sink deals with
119 * buffers that arrive too late in the sink. A buffer arrives too late in the
120 * sink when the presentation time (as a combination of the last segment, buffer
121 * timestamp and element base_time) plus the duration is before the current
123 * If the frame is later than max-lateness, the sink will drop the buffer
124 * without calling the render method.
125 * This feature is disabled if sync is disabled, the
126 * #GstBaseSinkClass.get_times() method does not return a valid start time or
127 * max-lateness is set to -1 (the default).
128 * Subclasses can use gst_base_sink_set_max_lateness() to configure the
129 * max-lateness value.
131 * The #GstBaseSink:qos property will enable the quality-of-service features of
132 * the basesink which gather statistics about the real-time performance of the
133 * clock synchronisation. For each buffer received in the sink, statistics are
134 * gathered and a QOS event is sent upstream with these numbers. This
135 * information can then be used by upstream elements to reduce their processing
138 * Since 0.10.15 the #GstBaseSink:async property can be used to instruct the
139 * sink to never perform an ASYNC state change. This feature is mostly usable
140 * when dealing with non-synchronized streams or sparse streams.
142 * Last reviewed on 2007-08-29 (0.10.15)
149 #include <gst/gst_private.h>
151 #include "gstbasesink.h"
152 #include <gst/gstmarshal.h>
153 #include <gst/gst-i18n-lib.h>
155 GST_DEBUG_CATEGORY_STATIC (gst_base_sink_debug);
156 #define GST_CAT_DEFAULT gst_base_sink_debug
158 #define GST_BASE_SINK_GET_PRIVATE(obj) \
159 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_SINK, GstBaseSinkPrivate))
161 #define GST_FLOW_STEP GST_FLOW_CUSTOM_ERROR
165 gboolean valid; /* if this info is valid */
166 guint32 seqnum; /* the seqnum of the STEP event */
167 GstFormat format; /* the format of the amount */
168 guint64 amount; /* the total amount of data to skip */
169 guint64 position; /* the position in the stepped data */
170 guint64 duration; /* the duration in time of the skipped data */
171 guint64 start; /* running_time of the start */
172 gdouble rate; /* rate of skipping */
173 gdouble start_rate; /* rate before skipping */
174 guint64 start_start; /* start position skipping */
175 guint64 start_stop; /* stop position skipping */
176 gboolean flush; /* if this was a flushing step */
177 gboolean intermediate; /* if this is an intermediate step */
178 gboolean need_preroll; /* if we need preroll after this step */
181 /* FIXME, some stuff in ABI.data and other in Private...
182 * Make up your mind please.
184 struct _GstBaseSinkPrivate
186 gint qos_enabled; /* ATOMIC */
187 gboolean async_enabled;
188 GstClockTimeDiff ts_offset;
189 GstClockTime render_delay;
191 /* start, stop of current buffer, stream time, used to report position */
192 GstClockTime current_sstart;
193 GstClockTime current_sstop;
195 /* start, stop and jitter of current buffer, running time */
196 GstClockTime current_rstart;
197 GstClockTime current_rstop;
198 GstClockTimeDiff current_jitter;
200 /* EOS sync time in running time */
201 GstClockTime eos_rtime;
203 /* last buffer that arrived in time, running time */
204 GstClockTime last_in_time;
205 /* when the last buffer left the sink, running time */
206 GstClockTime last_left;
208 /* running averages go here these are done on running time */
210 GstClockTime avg_duration;
213 /* these are done on system time. avg_jitter and avg_render are
214 * compared to eachother to see if the rendering time takes a
215 * huge amount of the processing, If so we are flooded with
217 GstClockTime last_left_systime;
218 GstClockTime avg_jitter;
219 GstClockTime start, stop;
220 GstClockTime avg_render;
222 /* number of rendered and dropped frames */
227 GstClockTime latency;
229 /* if we already commited the state */
232 /* when we received EOS */
233 gboolean received_eos;
235 /* when we are prerolled and able to report latency */
236 gboolean have_latency;
238 /* the last buffer we prerolled or rendered. Useful for making snapshots */
239 GstBuffer *last_buffer;
241 /* caps for pull based scheduling */
244 /* blocksize for pulling */
249 /* seqnum of the stream */
252 gboolean call_preroll;
253 gboolean step_unlock;
255 /* we have a pending and a current step operation */
256 GstStepInfo current_step;
257 GstStepInfo pending_step;
260 #define DO_RUNNING_AVG(avg,val,size) (((val) + ((size)-1) * (avg)) / (size))
262 /* generic running average, this has a neutral window size */
263 #define UPDATE_RUNNING_AVG(avg,val) DO_RUNNING_AVG(avg,val,8)
265 /* the windows for these running averages are experimentally obtained.
266 * possitive values get averaged more while negative values use a small
267 * window so we can react faster to badness. */
268 #define UPDATE_RUNNING_AVG_P(avg,val) DO_RUNNING_AVG(avg,val,16)
269 #define UPDATE_RUNNING_AVG_N(avg,val) DO_RUNNING_AVG(avg,val,4)
271 /* BaseSink properties */
273 #define DEFAULT_CAN_ACTIVATE_PULL FALSE /* fixme: enable me */
274 #define DEFAULT_CAN_ACTIVATE_PUSH TRUE
276 #define DEFAULT_PREROLL_QUEUE_LEN 0
277 #define DEFAULT_SYNC TRUE
278 #define DEFAULT_MAX_LATENESS -1
279 #define DEFAULT_QOS FALSE
280 #define DEFAULT_ASYNC TRUE
281 #define DEFAULT_TS_OFFSET 0
282 #define DEFAULT_BLOCKSIZE 4096
283 #define DEFAULT_RENDER_DELAY 0
288 PROP_PREROLL_QUEUE_LEN,
300 static GstElementClass *parent_class = NULL;
302 static void gst_base_sink_class_init (GstBaseSinkClass * klass);
303 static void gst_base_sink_init (GstBaseSink * trans, gpointer g_class);
304 static void gst_base_sink_finalize (GObject * object);
307 gst_base_sink_get_type (void)
309 static volatile gsize base_sink_type = 0;
311 if (g_once_init_enter (&base_sink_type)) {
313 static const GTypeInfo base_sink_info = {
314 sizeof (GstBaseSinkClass),
317 (GClassInitFunc) gst_base_sink_class_init,
320 sizeof (GstBaseSink),
322 (GInstanceInitFunc) gst_base_sink_init,
325 _type = g_type_register_static (GST_TYPE_ELEMENT,
326 "GstBaseSink", &base_sink_info, G_TYPE_FLAG_ABSTRACT);
327 g_once_init_leave (&base_sink_type, _type);
329 return base_sink_type;
332 static void gst_base_sink_set_property (GObject * object, guint prop_id,
333 const GValue * value, GParamSpec * pspec);
334 static void gst_base_sink_get_property (GObject * object, guint prop_id,
335 GValue * value, GParamSpec * pspec);
337 static gboolean gst_base_sink_send_event (GstElement * element,
339 static gboolean gst_base_sink_query (GstElement * element, GstQuery * query);
341 static GstCaps *gst_base_sink_get_caps (GstBaseSink * sink);
342 static gboolean gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps);
343 static GstFlowReturn gst_base_sink_buffer_alloc (GstBaseSink * sink,
344 guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
345 static void gst_base_sink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
346 GstClockTime * start, GstClockTime * end);
347 static gboolean gst_base_sink_set_flushing (GstBaseSink * basesink,
348 GstPad * pad, gboolean flushing);
349 static gboolean gst_base_sink_default_activate_pull (GstBaseSink * basesink,
351 static gboolean gst_base_sink_default_do_seek (GstBaseSink * sink,
352 GstSegment * segment);
353 static gboolean gst_base_sink_default_prepare_seek_segment (GstBaseSink * sink,
354 GstEvent * event, GstSegment * segment);
356 static GstStateChangeReturn gst_base_sink_change_state (GstElement * element,
357 GstStateChange transition);
359 static GstFlowReturn gst_base_sink_chain (GstPad * pad, GstBuffer * buffer);
360 static GstFlowReturn gst_base_sink_chain_list (GstPad * pad,
361 GstBufferList * list);
363 static void gst_base_sink_loop (GstPad * pad);
364 static gboolean gst_base_sink_pad_activate (GstPad * pad);
365 static gboolean gst_base_sink_pad_activate_push (GstPad * pad, gboolean active);
366 static gboolean gst_base_sink_pad_activate_pull (GstPad * pad, gboolean active);
367 static gboolean gst_base_sink_event (GstPad * pad, GstEvent * event);
369 static gboolean gst_base_sink_negotiate_pull (GstBaseSink * basesink);
370 static GstCaps *gst_base_sink_pad_getcaps (GstPad * pad);
371 static gboolean gst_base_sink_pad_setcaps (GstPad * pad, GstCaps * caps);
372 static void gst_base_sink_pad_fixate (GstPad * pad, GstCaps * caps);
373 static GstFlowReturn gst_base_sink_pad_buffer_alloc (GstPad * pad,
374 guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
377 /* check if an object was too late */
378 static gboolean gst_base_sink_is_too_late (GstBaseSink * basesink,
379 GstMiniObject * obj, GstClockTime start, GstClockTime stop,
380 GstClockReturn status, GstClockTimeDiff jitter);
381 static GstFlowReturn gst_base_sink_preroll_object (GstBaseSink * basesink,
382 gboolean is_list, GstMiniObject * obj);
385 gst_base_sink_class_init (GstBaseSinkClass * klass)
387 GObjectClass *gobject_class;
388 GstElementClass *gstelement_class;
390 gobject_class = G_OBJECT_CLASS (klass);
391 gstelement_class = GST_ELEMENT_CLASS (klass);
393 GST_DEBUG_CATEGORY_INIT (gst_base_sink_debug, "basesink", 0,
396 g_type_class_add_private (klass, sizeof (GstBaseSinkPrivate));
398 parent_class = g_type_class_peek_parent (klass);
400 gobject_class->finalize = gst_base_sink_finalize;
401 gobject_class->set_property = gst_base_sink_set_property;
402 gobject_class->get_property = gst_base_sink_get_property;
404 /* FIXME, this next value should be configured using an event from the
405 * upstream element, ie, the BUFFER_SIZE event. */
406 g_object_class_install_property (gobject_class, PROP_PREROLL_QUEUE_LEN,
407 g_param_spec_uint ("preroll-queue-len", "Preroll queue length",
408 "Number of buffers to queue during preroll", 0, G_MAXUINT,
409 DEFAULT_PREROLL_QUEUE_LEN,
410 G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
412 g_object_class_install_property (gobject_class, PROP_SYNC,
413 g_param_spec_boolean ("sync", "Sync", "Sync on the clock", DEFAULT_SYNC,
414 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
416 g_object_class_install_property (gobject_class, PROP_MAX_LATENESS,
417 g_param_spec_int64 ("max-lateness", "Max Lateness",
418 "Maximum number of nanoseconds that a buffer can be late before it "
419 "is dropped (-1 unlimited)", -1, G_MAXINT64, DEFAULT_MAX_LATENESS,
420 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
422 g_object_class_install_property (gobject_class, PROP_QOS,
423 g_param_spec_boolean ("qos", "Qos",
424 "Generate Quality-of-Service events upstream", DEFAULT_QOS,
425 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
429 * If set to #TRUE, the basesink will perform asynchronous state changes.
430 * When set to #FALSE, the sink will not signal the parent when it prerolls.
431 * Use this option when dealing with sparse streams or when synchronisation is
436 g_object_class_install_property (gobject_class, PROP_ASYNC,
437 g_param_spec_boolean ("async", "Async",
438 "Go asynchronously to PAUSED", DEFAULT_ASYNC,
439 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
441 * GstBaseSink:ts-offset
443 * Controls the final synchronisation, a negative value will render the buffer
444 * earlier while a positive value delays playback. This property can be
445 * used to fix synchronisation in bad files.
449 g_object_class_install_property (gobject_class, PROP_TS_OFFSET,
450 g_param_spec_int64 ("ts-offset", "TS Offset",
451 "Timestamp offset in nanoseconds", G_MININT64, G_MAXINT64,
452 DEFAULT_TS_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
454 * GstBaseSink:last-buffer
456 * The last buffer that arrived in the sink and was used for preroll or for
457 * rendering. This property can be used to generate thumbnails. This property
458 * can be NULL when the sink has not yet received a bufer.
462 g_object_class_install_property (gobject_class, PROP_LAST_BUFFER,
463 gst_param_spec_mini_object ("last-buffer", "Last Buffer",
464 "The last buffer received in the sink", GST_TYPE_BUFFER,
465 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
467 * GstBaseSink:blocksize
469 * The amount of bytes to pull when operating in pull mode.
473 g_object_class_install_property (gobject_class, PROP_BLOCKSIZE,
474 g_param_spec_uint ("blocksize", "Block size",
475 "Size in bytes to pull per buffer (0 = default)", 0, G_MAXUINT,
476 DEFAULT_BLOCKSIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
478 * GstBaseSink:render-delay
480 * The additional delay between synchronisation and actual rendering of the
481 * media. This property will add additional latency to the device in order to
482 * make other sinks compensate for the delay.
486 g_object_class_install_property (gobject_class, PROP_RENDER_DELAY,
487 g_param_spec_uint64 ("render-delay", "Render Delay",
488 "Additional render delay of the sink in nanoseconds", 0, G_MAXUINT64,
489 DEFAULT_RENDER_DELAY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
491 gstelement_class->change_state =
492 GST_DEBUG_FUNCPTR (gst_base_sink_change_state);
493 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_base_sink_send_event);
494 gstelement_class->query = GST_DEBUG_FUNCPTR (gst_base_sink_query);
496 klass->get_caps = GST_DEBUG_FUNCPTR (gst_base_sink_get_caps);
497 klass->set_caps = GST_DEBUG_FUNCPTR (gst_base_sink_set_caps);
498 klass->buffer_alloc = GST_DEBUG_FUNCPTR (gst_base_sink_buffer_alloc);
499 klass->get_times = GST_DEBUG_FUNCPTR (gst_base_sink_get_times);
500 klass->activate_pull =
501 GST_DEBUG_FUNCPTR (gst_base_sink_default_activate_pull);
503 /* Registering debug symbols for function pointers */
504 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_getcaps);
505 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_setcaps);
506 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_fixate);
507 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_buffer_alloc);
508 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_activate);
509 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_activate_push);
510 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_pad_activate_pull);
511 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_event);
512 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_chain);
513 GST_DEBUG_REGISTER_FUNCPTR (gst_base_sink_chain_list);
517 gst_base_sink_pad_getcaps (GstPad * pad)
519 GstBaseSinkClass *bclass;
521 GstCaps *caps = NULL;
523 bsink = GST_BASE_SINK (gst_pad_get_parent (pad));
524 bclass = GST_BASE_SINK_GET_CLASS (bsink);
526 if (bsink->pad_mode == GST_ACTIVATE_PULL) {
527 /* if we are operating in pull mode we only accept the negotiated caps */
528 GST_OBJECT_LOCK (pad);
529 if ((caps = GST_PAD_CAPS (pad)))
531 GST_OBJECT_UNLOCK (pad);
534 if (bclass->get_caps)
535 caps = bclass->get_caps (bsink);
538 GstPadTemplate *pad_template;
541 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass),
543 if (pad_template != NULL) {
544 caps = gst_caps_ref (gst_pad_template_get_caps (pad_template));
548 gst_object_unref (bsink);
554 gst_base_sink_pad_setcaps (GstPad * pad, GstCaps * caps)
556 GstBaseSinkClass *bclass;
560 bsink = GST_BASE_SINK (gst_pad_get_parent (pad));
561 bclass = GST_BASE_SINK_GET_CLASS (bsink);
563 if (res && bclass->set_caps)
564 res = bclass->set_caps (bsink, caps);
566 gst_object_unref (bsink);
572 gst_base_sink_pad_fixate (GstPad * pad, GstCaps * caps)
574 GstBaseSinkClass *bclass;
577 bsink = GST_BASE_SINK (gst_pad_get_parent (pad));
578 bclass = GST_BASE_SINK_GET_CLASS (bsink);
581 bclass->fixate (bsink, caps);
583 gst_object_unref (bsink);
587 gst_base_sink_pad_buffer_alloc (GstPad * pad, guint64 offset, guint size,
588 GstCaps * caps, GstBuffer ** buf)
590 GstBaseSinkClass *bclass;
592 GstFlowReturn result = GST_FLOW_OK;
594 bsink = GST_BASE_SINK (gst_pad_get_parent (pad));
595 bclass = GST_BASE_SINK_GET_CLASS (bsink);
597 if (bclass->buffer_alloc)
598 result = bclass->buffer_alloc (bsink, offset, size, caps, buf);
600 *buf = NULL; /* fallback in gstpad.c will allocate generic buffer */
602 gst_object_unref (bsink);
608 gst_base_sink_init (GstBaseSink * basesink, gpointer g_class)
610 GstPadTemplate *pad_template;
611 GstBaseSinkPrivate *priv;
613 basesink->priv = priv = GST_BASE_SINK_GET_PRIVATE (basesink);
616 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
617 g_return_if_fail (pad_template != NULL);
619 basesink->sinkpad = gst_pad_new_from_template (pad_template, "sink");
621 gst_pad_set_getcaps_function (basesink->sinkpad, gst_base_sink_pad_getcaps);
622 gst_pad_set_setcaps_function (basesink->sinkpad, gst_base_sink_pad_setcaps);
623 gst_pad_set_fixatecaps_function (basesink->sinkpad, gst_base_sink_pad_fixate);
624 gst_pad_set_bufferalloc_function (basesink->sinkpad,
625 gst_base_sink_pad_buffer_alloc);
626 gst_pad_set_activate_function (basesink->sinkpad, gst_base_sink_pad_activate);
627 gst_pad_set_activatepush_function (basesink->sinkpad,
628 gst_base_sink_pad_activate_push);
629 gst_pad_set_activatepull_function (basesink->sinkpad,
630 gst_base_sink_pad_activate_pull);
631 gst_pad_set_event_function (basesink->sinkpad, gst_base_sink_event);
632 gst_pad_set_chain_function (basesink->sinkpad, gst_base_sink_chain);
633 gst_pad_set_chain_list_function (basesink->sinkpad, gst_base_sink_chain_list);
634 gst_element_add_pad (GST_ELEMENT_CAST (basesink), basesink->sinkpad);
636 basesink->pad_mode = GST_ACTIVATE_NONE;
637 basesink->preroll_queue = g_queue_new ();
638 basesink->abidata.ABI.clip_segment = gst_segment_new ();
639 priv->have_latency = FALSE;
641 basesink->can_activate_push = DEFAULT_CAN_ACTIVATE_PUSH;
642 basesink->can_activate_pull = DEFAULT_CAN_ACTIVATE_PULL;
644 basesink->sync = DEFAULT_SYNC;
645 basesink->abidata.ABI.max_lateness = DEFAULT_MAX_LATENESS;
646 g_atomic_int_set (&priv->qos_enabled, DEFAULT_QOS);
647 priv->async_enabled = DEFAULT_ASYNC;
648 priv->ts_offset = DEFAULT_TS_OFFSET;
649 priv->render_delay = DEFAULT_RENDER_DELAY;
650 priv->blocksize = DEFAULT_BLOCKSIZE;
652 GST_OBJECT_FLAG_SET (basesink, GST_ELEMENT_IS_SINK);
656 gst_base_sink_finalize (GObject * object)
658 GstBaseSink *basesink;
660 basesink = GST_BASE_SINK (object);
662 g_queue_free (basesink->preroll_queue);
663 gst_segment_free (basesink->abidata.ABI.clip_segment);
665 G_OBJECT_CLASS (parent_class)->finalize (object);
669 * gst_base_sink_set_sync:
671 * @sync: the new sync value.
673 * Configures @sink to synchronize on the clock or not. When
674 * @sync is FALSE, incomming samples will be played as fast as
675 * possible. If @sync is TRUE, the timestamps of the incomming
676 * buffers will be used to schedule the exact render time of its
682 gst_base_sink_set_sync (GstBaseSink * sink, gboolean sync)
684 g_return_if_fail (GST_IS_BASE_SINK (sink));
686 GST_OBJECT_LOCK (sink);
688 GST_OBJECT_UNLOCK (sink);
692 * gst_base_sink_get_sync:
695 * Checks if @sink is currently configured to synchronize against the
698 * Returns: TRUE if the sink is configured to synchronize against the clock.
703 gst_base_sink_get_sync (GstBaseSink * sink)
707 g_return_val_if_fail (GST_IS_BASE_SINK (sink), FALSE);
709 GST_OBJECT_LOCK (sink);
711 GST_OBJECT_UNLOCK (sink);
717 * gst_base_sink_set_max_lateness:
719 * @max_lateness: the new max lateness value.
721 * Sets the new max lateness value to @max_lateness. This value is
722 * used to decide if a buffer should be dropped or not based on the
723 * buffer timestamp and the current clock time. A value of -1 means
729 gst_base_sink_set_max_lateness (GstBaseSink * sink, gint64 max_lateness)
731 g_return_if_fail (GST_IS_BASE_SINK (sink));
733 GST_OBJECT_LOCK (sink);
734 sink->abidata.ABI.max_lateness = max_lateness;
735 GST_OBJECT_UNLOCK (sink);
739 * gst_base_sink_get_max_lateness:
742 * Gets the max lateness value. See gst_base_sink_set_max_lateness for
745 * Returns: The maximum time in nanoseconds that a buffer can be late
746 * before it is dropped and not rendered. A value of -1 means an
752 gst_base_sink_get_max_lateness (GstBaseSink * sink)
756 g_return_val_if_fail (GST_IS_BASE_SINK (sink), -1);
758 GST_OBJECT_LOCK (sink);
759 res = sink->abidata.ABI.max_lateness;
760 GST_OBJECT_UNLOCK (sink);
766 * gst_base_sink_set_qos_enabled:
768 * @enabled: the new qos value.
770 * Configures @sink to send Quality-of-Service events upstream.
775 gst_base_sink_set_qos_enabled (GstBaseSink * sink, gboolean enabled)
777 g_return_if_fail (GST_IS_BASE_SINK (sink));
779 g_atomic_int_set (&sink->priv->qos_enabled, enabled);
783 * gst_base_sink_is_qos_enabled:
786 * Checks if @sink is currently configured to send Quality-of-Service events
789 * Returns: TRUE if the sink is configured to perform Quality-of-Service.
794 gst_base_sink_is_qos_enabled (GstBaseSink * sink)
798 g_return_val_if_fail (GST_IS_BASE_SINK (sink), FALSE);
800 res = g_atomic_int_get (&sink->priv->qos_enabled);
806 * gst_base_sink_set_async_enabled:
808 * @enabled: the new async value.
810 * Configures @sink to perform all state changes asynchronusly. When async is
811 * disabled, the sink will immediatly go to PAUSED instead of waiting for a
812 * preroll buffer. This feature is usefull if the sink does not synchronize
813 * against the clock or when it is dealing with sparse streams.
818 gst_base_sink_set_async_enabled (GstBaseSink * sink, gboolean enabled)
820 g_return_if_fail (GST_IS_BASE_SINK (sink));
822 GST_PAD_PREROLL_LOCK (sink->sinkpad);
823 sink->priv->async_enabled = enabled;
824 GST_LOG_OBJECT (sink, "set async enabled to %d", enabled);
825 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
829 * gst_base_sink_is_async_enabled:
832 * Checks if @sink is currently configured to perform asynchronous state
835 * Returns: TRUE if the sink is configured to perform asynchronous state
841 gst_base_sink_is_async_enabled (GstBaseSink * sink)
845 g_return_val_if_fail (GST_IS_BASE_SINK (sink), FALSE);
847 GST_PAD_PREROLL_LOCK (sink->sinkpad);
848 res = sink->priv->async_enabled;
849 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
855 * gst_base_sink_set_ts_offset:
857 * @offset: the new offset
859 * Adjust the synchronisation of @sink with @offset. A negative value will
860 * render buffers earlier than their timestamp. A positive value will delay
861 * rendering. This function can be used to fix playback of badly timestamped
867 gst_base_sink_set_ts_offset (GstBaseSink * sink, GstClockTimeDiff offset)
869 g_return_if_fail (GST_IS_BASE_SINK (sink));
871 GST_OBJECT_LOCK (sink);
872 sink->priv->ts_offset = offset;
873 GST_LOG_OBJECT (sink, "set time offset to %" G_GINT64_FORMAT, offset);
874 GST_OBJECT_UNLOCK (sink);
878 * gst_base_sink_get_ts_offset:
881 * Get the synchronisation offset of @sink.
883 * Returns: The synchronisation offset.
888 gst_base_sink_get_ts_offset (GstBaseSink * sink)
890 GstClockTimeDiff res;
892 g_return_val_if_fail (GST_IS_BASE_SINK (sink), 0);
894 GST_OBJECT_LOCK (sink);
895 res = sink->priv->ts_offset;
896 GST_OBJECT_UNLOCK (sink);
902 * gst_base_sink_get_last_buffer:
905 * Get the last buffer that arrived in the sink and was used for preroll or for
906 * rendering. This property can be used to generate thumbnails.
908 * The #GstCaps on the buffer can be used to determine the type of the buffer.
910 * Returns: a #GstBuffer. gst_buffer_unref() after usage. This function returns
911 * NULL when no buffer has arrived in the sink yet or when the sink is not in
917 gst_base_sink_get_last_buffer (GstBaseSink * sink)
921 g_return_val_if_fail (GST_IS_BASE_SINK (sink), NULL);
923 GST_OBJECT_LOCK (sink);
924 if ((res = sink->priv->last_buffer))
925 gst_buffer_ref (res);
926 GST_OBJECT_UNLOCK (sink);
932 gst_base_sink_set_last_buffer (GstBaseSink * sink, GstBuffer * buffer)
936 GST_OBJECT_LOCK (sink);
937 old = sink->priv->last_buffer;
938 if (G_LIKELY (old != buffer)) {
939 GST_DEBUG_OBJECT (sink, "setting last buffer to %p", buffer);
940 if (G_LIKELY (buffer))
941 gst_buffer_ref (buffer);
942 sink->priv->last_buffer = buffer;
946 GST_OBJECT_UNLOCK (sink);
948 /* avoid unreffing with the lock because cleanup code might want to take the
951 gst_buffer_unref (old);
955 * gst_base_sink_get_latency:
958 * Get the currently configured latency.
960 * Returns: The configured latency.
965 gst_base_sink_get_latency (GstBaseSink * sink)
969 GST_OBJECT_LOCK (sink);
970 res = sink->priv->latency;
971 GST_OBJECT_UNLOCK (sink);
977 * gst_base_sink_query_latency:
979 * @live: if the sink is live
980 * @upstream_live: if an upstream element is live
981 * @min_latency: the min latency of the upstream elements
982 * @max_latency: the max latency of the upstream elements
984 * Query the sink for the latency parameters. The latency will be queried from
985 * the upstream elements. @live will be TRUE if @sink is configured to
986 * synchronize against the clock. @upstream_live will be TRUE if an upstream
989 * If both @live and @upstream_live are TRUE, the sink will want to compensate
990 * for the latency introduced by the upstream elements by setting the
991 * @min_latency to a strictly possitive value.
993 * This function is mostly used by subclasses.
995 * Returns: TRUE if the query succeeded.
1000 gst_base_sink_query_latency (GstBaseSink * sink, gboolean * live,
1001 gboolean * upstream_live, GstClockTime * min_latency,
1002 GstClockTime * max_latency)
1004 gboolean l, us_live, res, have_latency;
1005 GstClockTime min, max, render_delay;
1007 GstClockTime us_min, us_max;
1009 /* we are live when we sync to the clock */
1010 GST_OBJECT_LOCK (sink);
1012 have_latency = sink->priv->have_latency;
1013 render_delay = sink->priv->render_delay;
1014 GST_OBJECT_UNLOCK (sink);
1016 /* assume no latency */
1022 GST_DEBUG_OBJECT (sink, "we are ready for LATENCY query");
1023 /* we are ready for a latency query this is when we preroll or when we are
1025 query = gst_query_new_latency ();
1027 /* ask the peer for the latency */
1028 if ((res = gst_pad_peer_query (sink->sinkpad, query))) {
1029 /* get upstream min and max latency */
1030 gst_query_parse_latency (query, &us_live, &us_min, &us_max);
1033 /* upstream live, use its latency, subclasses should use these
1034 * values to create the complete latency. */
1039 /* we need to add the render delay if we are live */
1041 min += render_delay;
1043 max += render_delay;
1046 gst_query_unref (query);
1048 GST_DEBUG_OBJECT (sink, "we are not yet ready for LATENCY query");
1052 /* not live, we tried to do the query, if it failed we return TRUE anyway */
1056 GST_DEBUG_OBJECT (sink, "latency query failed but we are not live");
1058 GST_DEBUG_OBJECT (sink, "latency query failed and we are live");
1063 GST_DEBUG_OBJECT (sink, "latency query: live: %d, have_latency %d,"
1064 " upstream: %d, min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT, l,
1065 have_latency, us_live, GST_TIME_ARGS (min), GST_TIME_ARGS (max));
1070 *upstream_live = us_live;
1080 * gst_base_sink_set_render_delay:
1081 * @sink: a #GstBaseSink
1082 * @delay: the new delay
1084 * Set the render delay in @sink to @delay. The render delay is the time
1085 * between actual rendering of a buffer and its synchronisation time. Some
1086 * devices might delay media rendering which can be compensated for with this
1089 * After calling this function, this sink will report additional latency and
1090 * other sinks will adjust their latency to delay the rendering of their media.
1092 * This function is usually called by subclasses.
1097 gst_base_sink_set_render_delay (GstBaseSink * sink, GstClockTime delay)
1099 GstClockTime old_render_delay;
1101 g_return_if_fail (GST_IS_BASE_SINK (sink));
1103 GST_OBJECT_LOCK (sink);
1104 old_render_delay = sink->priv->render_delay;
1105 sink->priv->render_delay = delay;
1106 GST_LOG_OBJECT (sink, "set render delay to %" GST_TIME_FORMAT,
1107 GST_TIME_ARGS (delay));
1108 GST_OBJECT_UNLOCK (sink);
1110 if (delay != old_render_delay) {
1111 GST_DEBUG_OBJECT (sink, "posting latency changed");
1112 gst_element_post_message (GST_ELEMENT_CAST (sink),
1113 gst_message_new_latency (GST_OBJECT_CAST (sink)));
1118 * gst_base_sink_get_render_delay:
1119 * @sink: a #GstBaseSink
1121 * Get the render delay of @sink. see gst_base_sink_set_render_delay() for more
1122 * information about the render delay.
1124 * Returns: the render delay of @sink.
1129 gst_base_sink_get_render_delay (GstBaseSink * sink)
1131 GstClockTimeDiff res;
1133 g_return_val_if_fail (GST_IS_BASE_SINK (sink), 0);
1135 GST_OBJECT_LOCK (sink);
1136 res = sink->priv->render_delay;
1137 GST_OBJECT_UNLOCK (sink);
1143 * gst_base_sink_set_blocksize:
1144 * @sink: a #GstBaseSink
1145 * @blocksize: the blocksize in bytes
1147 * Set the number of bytes that the sink will pull when it is operating in pull
1153 gst_base_sink_set_blocksize (GstBaseSink * sink, guint blocksize)
1155 g_return_if_fail (GST_IS_BASE_SINK (sink));
1157 GST_OBJECT_LOCK (sink);
1158 sink->priv->blocksize = blocksize;
1159 GST_LOG_OBJECT (sink, "set blocksize to %u", blocksize);
1160 GST_OBJECT_UNLOCK (sink);
1164 * gst_base_sink_get_blocksize:
1165 * @sink: a #GstBaseSink
1167 * Get the number of bytes that the sink will pull when it is operating in pull
1170 * Returns: the number of bytes @sink will pull in pull mode.
1175 gst_base_sink_get_blocksize (GstBaseSink * sink)
1179 g_return_val_if_fail (GST_IS_BASE_SINK (sink), 0);
1181 GST_OBJECT_LOCK (sink);
1182 res = sink->priv->blocksize;
1183 GST_OBJECT_UNLOCK (sink);
1189 gst_base_sink_set_property (GObject * object, guint prop_id,
1190 const GValue * value, GParamSpec * pspec)
1192 GstBaseSink *sink = GST_BASE_SINK (object);
1195 case PROP_PREROLL_QUEUE_LEN:
1196 /* preroll lock necessary to serialize with finish_preroll */
1197 GST_PAD_PREROLL_LOCK (sink->sinkpad);
1198 sink->preroll_queue_max_len = g_value_get_uint (value);
1199 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
1202 gst_base_sink_set_sync (sink, g_value_get_boolean (value));
1204 case PROP_MAX_LATENESS:
1205 gst_base_sink_set_max_lateness (sink, g_value_get_int64 (value));
1208 gst_base_sink_set_qos_enabled (sink, g_value_get_boolean (value));
1211 gst_base_sink_set_async_enabled (sink, g_value_get_boolean (value));
1213 case PROP_TS_OFFSET:
1214 gst_base_sink_set_ts_offset (sink, g_value_get_int64 (value));
1216 case PROP_BLOCKSIZE:
1217 gst_base_sink_set_blocksize (sink, g_value_get_uint (value));
1219 case PROP_RENDER_DELAY:
1220 gst_base_sink_set_render_delay (sink, g_value_get_uint64 (value));
1223 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1229 gst_base_sink_get_property (GObject * object, guint prop_id, GValue * value,
1232 GstBaseSink *sink = GST_BASE_SINK (object);
1235 case PROP_PREROLL_QUEUE_LEN:
1236 GST_PAD_PREROLL_LOCK (sink->sinkpad);
1237 g_value_set_uint (value, sink->preroll_queue_max_len);
1238 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
1241 g_value_set_boolean (value, gst_base_sink_get_sync (sink));
1243 case PROP_MAX_LATENESS:
1244 g_value_set_int64 (value, gst_base_sink_get_max_lateness (sink));
1247 g_value_set_boolean (value, gst_base_sink_is_qos_enabled (sink));
1250 g_value_set_boolean (value, gst_base_sink_is_async_enabled (sink));
1252 case PROP_TS_OFFSET:
1253 g_value_set_int64 (value, gst_base_sink_get_ts_offset (sink));
1255 case PROP_LAST_BUFFER:
1256 gst_value_take_buffer (value, gst_base_sink_get_last_buffer (sink));
1258 case PROP_BLOCKSIZE:
1259 g_value_set_uint (value, gst_base_sink_get_blocksize (sink));
1261 case PROP_RENDER_DELAY:
1262 g_value_set_uint64 (value, gst_base_sink_get_render_delay (sink));
1265 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1272 gst_base_sink_get_caps (GstBaseSink * sink)
1278 gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
1283 static GstFlowReturn
1284 gst_base_sink_buffer_alloc (GstBaseSink * sink, guint64 offset, guint size,
1285 GstCaps * caps, GstBuffer ** buf)
1291 /* with PREROLL_LOCK, STREAM_LOCK */
1293 gst_base_sink_preroll_queue_flush (GstBaseSink * basesink, GstPad * pad)
1297 GST_DEBUG_OBJECT (basesink, "flushing queue %p", basesink);
1298 while ((obj = g_queue_pop_head (basesink->preroll_queue))) {
1299 GST_DEBUG_OBJECT (basesink, "popped %p", obj);
1300 gst_mini_object_unref (obj);
1302 /* we can't have EOS anymore now */
1303 basesink->eos = FALSE;
1304 basesink->priv->received_eos = FALSE;
1305 basesink->have_preroll = FALSE;
1306 basesink->priv->step_unlock = FALSE;
1307 basesink->eos_queued = FALSE;
1308 basesink->preroll_queued = 0;
1309 basesink->buffers_queued = 0;
1310 basesink->events_queued = 0;
1311 /* can't report latency anymore until we preroll again */
1312 if (basesink->priv->async_enabled) {
1313 GST_OBJECT_LOCK (basesink);
1314 basesink->priv->have_latency = FALSE;
1315 GST_OBJECT_UNLOCK (basesink);
1317 /* and signal any waiters now */
1318 GST_PAD_PREROLL_SIGNAL (pad);
1321 /* with STREAM_LOCK, configures given segment with the event information. */
1323 gst_base_sink_configure_segment (GstBaseSink * basesink, GstPad * pad,
1324 GstEvent * event, GstSegment * segment)
1327 gdouble rate, arate;
1333 /* the newsegment event is needed to bring the buffer timestamps to the
1334 * stream time and to drop samples outside of the playback segment. */
1335 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
1336 &start, &stop, &time);
1338 /* The segment is protected with both the STREAM_LOCK and the OBJECT_LOCK.
1339 * We protect with the OBJECT_LOCK so that we can use the values to
1340 * safely answer a POSITION query. */
1341 GST_OBJECT_LOCK (basesink);
1342 gst_segment_set_newsegment_full (segment, update, rate, arate, format, start,
1345 if (format == GST_FORMAT_TIME) {
1346 GST_DEBUG_OBJECT (basesink,
1347 "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
1348 "format GST_FORMAT_TIME, "
1349 "%" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT
1350 ", time %" GST_TIME_FORMAT ", accum %" GST_TIME_FORMAT,
1351 update, rate, arate, GST_TIME_ARGS (segment->start),
1352 GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time),
1353 GST_TIME_ARGS (segment->accum));
1355 GST_DEBUG_OBJECT (basesink,
1356 "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
1358 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
1359 G_GINT64_FORMAT ", accum %" G_GINT64_FORMAT, update, rate, arate,
1360 segment->format, segment->start, segment->stop, segment->time,
1363 GST_OBJECT_UNLOCK (basesink);
1366 /* with PREROLL_LOCK, STREAM_LOCK */
1368 gst_base_sink_commit_state (GstBaseSink * basesink)
1370 /* commit state and proceed to next pending state */
1371 GstState current, next, pending, post_pending;
1372 gboolean post_paused = FALSE;
1373 gboolean post_async_done = FALSE;
1374 gboolean post_playing = FALSE;
1376 /* we are certainly not playing async anymore now */
1377 basesink->playing_async = FALSE;
1379 GST_OBJECT_LOCK (basesink);
1380 current = GST_STATE (basesink);
1381 next = GST_STATE_NEXT (basesink);
1382 pending = GST_STATE_PENDING (basesink);
1383 post_pending = pending;
1386 case GST_STATE_PLAYING:
1388 GstBaseSinkClass *bclass;
1389 GstStateChangeReturn ret;
1391 bclass = GST_BASE_SINK_GET_CLASS (basesink);
1393 GST_DEBUG_OBJECT (basesink, "commiting state to PLAYING");
1395 basesink->need_preroll = FALSE;
1396 post_async_done = TRUE;
1397 basesink->priv->commited = TRUE;
1398 post_playing = TRUE;
1399 /* post PAUSED too when we were READY */
1400 if (current == GST_STATE_READY) {
1404 /* make sure we notify the subclass of async playing */
1405 if (bclass->async_play) {
1406 GST_WARNING_OBJECT (basesink, "deprecated async_play");
1407 ret = bclass->async_play (basesink);
1408 if (ret == GST_STATE_CHANGE_FAILURE)
1413 case GST_STATE_PAUSED:
1414 GST_DEBUG_OBJECT (basesink, "commiting state to PAUSED");
1416 post_async_done = TRUE;
1417 basesink->priv->commited = TRUE;
1418 post_pending = GST_STATE_VOID_PENDING;
1420 case GST_STATE_READY:
1421 case GST_STATE_NULL:
1423 case GST_STATE_VOID_PENDING:
1424 goto nothing_pending;
1429 /* we can report latency queries now */
1430 basesink->priv->have_latency = TRUE;
1432 GST_STATE (basesink) = pending;
1433 GST_STATE_NEXT (basesink) = GST_STATE_VOID_PENDING;
1434 GST_STATE_PENDING (basesink) = GST_STATE_VOID_PENDING;
1435 GST_STATE_RETURN (basesink) = GST_STATE_CHANGE_SUCCESS;
1436 GST_OBJECT_UNLOCK (basesink);
1439 GST_DEBUG_OBJECT (basesink, "posting PAUSED state change message");
1440 gst_element_post_message (GST_ELEMENT_CAST (basesink),
1441 gst_message_new_state_changed (GST_OBJECT_CAST (basesink),
1442 current, next, post_pending));
1444 if (post_async_done) {
1445 GST_DEBUG_OBJECT (basesink, "posting async-done message");
1446 gst_element_post_message (GST_ELEMENT_CAST (basesink),
1447 gst_message_new_async_done (GST_OBJECT_CAST (basesink)));
1450 GST_DEBUG_OBJECT (basesink, "posting PLAYING state change message");
1451 gst_element_post_message (GST_ELEMENT_CAST (basesink),
1452 gst_message_new_state_changed (GST_OBJECT_CAST (basesink),
1453 next, pending, GST_STATE_VOID_PENDING));
1456 GST_STATE_BROADCAST (basesink);
1462 /* Depending on the state, set our vars. We get in this situation when the
1463 * state change function got a change to update the state vars before the
1464 * streaming thread did. This is fine but we need to make sure that we
1465 * update the need_preroll var since it was TRUE when we got here and might
1466 * become FALSE if we got to PLAYING. */
1467 GST_DEBUG_OBJECT (basesink, "nothing to commit, now in %s",
1468 gst_element_state_get_name (current));
1470 case GST_STATE_PLAYING:
1471 basesink->need_preroll = FALSE;
1473 case GST_STATE_PAUSED:
1474 basesink->need_preroll = TRUE;
1477 basesink->need_preroll = FALSE;
1478 basesink->flushing = TRUE;
1481 /* we can report latency queries now */
1482 basesink->priv->have_latency = TRUE;
1483 GST_OBJECT_UNLOCK (basesink);
1488 /* app is going to READY */
1489 GST_DEBUG_OBJECT (basesink, "stopping");
1490 basesink->need_preroll = FALSE;
1491 basesink->flushing = TRUE;
1492 GST_OBJECT_UNLOCK (basesink);
1497 GST_DEBUG_OBJECT (basesink, "async commit failed");
1498 GST_STATE_RETURN (basesink) = GST_STATE_CHANGE_FAILURE;
1499 GST_OBJECT_UNLOCK (basesink);
1505 start_stepping (GstBaseSink * sink, GstSegment * segment,
1506 GstStepInfo * pending, GstStepInfo * current)
1509 GstMessage *message;
1511 GST_DEBUG_OBJECT (sink, "update pending step");
1513 GST_OBJECT_LOCK (sink);
1514 memcpy (current, pending, sizeof (GstStepInfo));
1515 pending->valid = FALSE;
1516 GST_OBJECT_UNLOCK (sink);
1518 /* post message first */
1520 gst_message_new_step_start (GST_OBJECT (sink), TRUE, current->format,
1521 current->amount, current->rate, current->flush, current->intermediate);
1522 gst_message_set_seqnum (message, current->seqnum);
1523 gst_element_post_message (GST_ELEMENT (sink), message);
1525 /* get the running time of where we paused and remember it */
1526 current->start = gst_element_get_start_time (GST_ELEMENT_CAST (sink));
1527 gst_segment_set_running_time (segment, GST_FORMAT_TIME, current->start);
1529 /* set the new rate for the remainder of the segment */
1530 current->start_rate = segment->rate;
1531 segment->rate *= current->rate;
1532 segment->abs_rate = ABS (segment->rate);
1535 if (segment->rate > 0.0)
1536 current->start_stop = segment->stop;
1538 current->start_start = segment->start;
1540 if (current->format == GST_FORMAT_TIME) {
1541 end = current->start + current->amount;
1542 if (!current->flush) {
1543 /* update the segment clipping regions for non-flushing seeks */
1544 if (segment->rate > 0.0) {
1545 segment->stop = gst_segment_to_position (segment, GST_FORMAT_TIME, end);
1546 segment->last_stop = segment->stop;
1550 position = gst_segment_to_position (segment, GST_FORMAT_TIME, end);
1551 segment->time = position;
1552 segment->start = position;
1553 segment->last_stop = position;
1558 GST_DEBUG_OBJECT (sink,
1559 "segment now rate %lf, applied rate %lf, "
1560 "format GST_FORMAT_TIME, "
1561 "%" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT
1562 ", time %" GST_TIME_FORMAT ", accum %" GST_TIME_FORMAT,
1563 segment->rate, segment->applied_rate, GST_TIME_ARGS (segment->start),
1564 GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time),
1565 GST_TIME_ARGS (segment->accum));
1567 GST_DEBUG_OBJECT (sink, "step started at running_time %" GST_TIME_FORMAT,
1568 GST_TIME_ARGS (current->start));
1570 if (current->amount == -1) {
1571 GST_DEBUG_OBJECT (sink, "step amount == -1, stop stepping");
1572 current->valid = FALSE;
1574 GST_DEBUG_OBJECT (sink, "step amount: %" G_GUINT64_FORMAT ", format: %s, "
1575 "rate: %f", current->amount, gst_format_get_name (current->format),
1581 stop_stepping (GstBaseSink * sink, GstSegment * segment,
1582 GstStepInfo * current, gint64 rstart, gint64 rstop, gboolean eos)
1584 gint64 stop, position;
1585 GstMessage *message;
1587 GST_DEBUG_OBJECT (sink, "step complete");
1589 if (segment->rate > 0.0)
1594 GST_DEBUG_OBJECT (sink,
1595 "step stop at running_time %" GST_TIME_FORMAT, GST_TIME_ARGS (stop));
1598 current->duration = current->position;
1600 current->duration = stop - current->start;
1602 GST_DEBUG_OBJECT (sink, "step elapsed running_time %" GST_TIME_FORMAT,
1603 GST_TIME_ARGS (current->duration));
1605 position = current->start + current->duration;
1607 /* now move the segment to the new running time */
1608 gst_segment_set_running_time (segment, GST_FORMAT_TIME, position);
1610 if (current->flush) {
1611 /* and remove the accumulated time we flushed, start time did not change */
1612 segment->accum = current->start;
1614 /* start time is now the stepped position */
1615 gst_element_set_start_time (GST_ELEMENT_CAST (sink), position);
1618 /* restore the previous rate */
1619 segment->rate = current->start_rate;
1620 segment->abs_rate = ABS (segment->rate);
1622 if (segment->rate > 0.0)
1623 segment->stop = current->start_stop;
1625 segment->start = current->start_start;
1627 /* the clip segment is used for position report in paused... */
1628 memcpy (sink->abidata.ABI.clip_segment, segment, sizeof (GstSegment));
1630 /* post the step done when we know the stepped duration in TIME */
1632 gst_message_new_step_done (GST_OBJECT_CAST (sink), current->format,
1633 current->amount, current->rate, current->flush, current->intermediate,
1634 current->duration, eos);
1635 gst_message_set_seqnum (message, current->seqnum);
1636 gst_element_post_message (GST_ELEMENT_CAST (sink), message);
1638 if (!current->intermediate)
1639 sink->need_preroll = current->need_preroll;
1641 /* and the current step info finished and becomes invalid */
1642 current->valid = FALSE;
1646 handle_stepping (GstBaseSink * sink, GstSegment * segment,
1647 GstStepInfo * current, gint64 * cstart, gint64 * cstop, gint64 * rstart,
1650 gboolean step_end = FALSE;
1652 /* see if we need to skip this buffer because of stepping */
1653 switch (current->format) {
1654 case GST_FORMAT_TIME:
1659 if (segment->rate > 0.0) {
1660 if (segment->stop == *cstop)
1661 *rstop = *rstart + current->amount;
1666 if (segment->start == *cstart)
1667 *rstart = *rstop + current->amount;
1673 end = current->start + current->amount;
1674 current->position = first - current->start;
1676 if (G_UNLIKELY (segment->abs_rate != 1.0))
1677 current->position /= segment->abs_rate;
1679 GST_DEBUG_OBJECT (sink,
1680 "buffer: %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT,
1681 GST_TIME_ARGS (first), GST_TIME_ARGS (last));
1682 GST_DEBUG_OBJECT (sink,
1683 "got time step %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT "/%"
1684 GST_TIME_FORMAT, GST_TIME_ARGS (current->position),
1685 GST_TIME_ARGS (last - current->start),
1686 GST_TIME_ARGS (current->amount));
1688 if ((current->flush && current->position >= current->amount)
1690 GST_DEBUG_OBJECT (sink, "step ended, we need clipping");
1692 if (segment->rate > 0.0) {
1694 *cstart = gst_segment_to_position (segment, GST_FORMAT_TIME, end);
1697 *cstop = gst_segment_to_position (segment, GST_FORMAT_TIME, end);
1700 GST_DEBUG_OBJECT (sink,
1701 "cstart %" GST_TIME_FORMAT ", rstart %" GST_TIME_FORMAT,
1702 GST_TIME_ARGS (*cstart), GST_TIME_ARGS (*rstart));
1703 GST_DEBUG_OBJECT (sink,
1704 "cstop %" GST_TIME_FORMAT ", rstop %" GST_TIME_FORMAT,
1705 GST_TIME_ARGS (*cstop), GST_TIME_ARGS (*rstop));
1708 case GST_FORMAT_BUFFERS:
1709 GST_DEBUG_OBJECT (sink,
1710 "got default step %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT,
1711 current->position, current->amount);
1713 if (current->position < current->amount) {
1714 current->position++;
1719 case GST_FORMAT_DEFAULT:
1721 GST_DEBUG_OBJECT (sink,
1722 "got unknown step %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT,
1723 current->position, current->amount);
1729 /* with STREAM_LOCK, PREROLL_LOCK
1731 * Returns TRUE if the object needs synchronisation and takes therefore
1732 * part in prerolling.
1734 * rsstart/rsstop contain the start/stop in stream time.
1735 * rrstart/rrstop contain the start/stop in running time.
1738 gst_base_sink_get_sync_times (GstBaseSink * basesink, GstMiniObject * obj,
1739 GstClockTime * rsstart, GstClockTime * rsstop,
1740 GstClockTime * rrstart, GstClockTime * rrstop, gboolean * do_sync,
1741 gboolean * stepped, GstSegment * segment, GstStepInfo * step,
1742 gboolean * step_end)
1744 GstBaseSinkClass *bclass;
1746 GstClockTime start, stop; /* raw start/stop timestamps */
1747 gint64 cstart, cstop; /* clipped raw timestamps */
1748 gint64 rstart, rstop; /* clipped timestamps converted to running time */
1749 GstClockTime sstart, sstop; /* clipped timestamps converted to stream time */
1751 GstBaseSinkPrivate *priv;
1754 priv = basesink->priv;
1756 /* start with nothing */
1757 start = stop = GST_CLOCK_TIME_NONE;
1759 if (G_UNLIKELY (GST_IS_EVENT (obj))) {
1760 GstEvent *event = GST_EVENT_CAST (obj);
1762 switch (GST_EVENT_TYPE (event)) {
1763 /* EOS event needs syncing */
1766 if (basesink->segment.rate >= 0.0) {
1767 sstart = sstop = priv->current_sstop;
1768 if (!GST_CLOCK_TIME_IS_VALID (sstart)) {
1769 /* we have not seen a buffer yet, use the segment values */
1770 sstart = sstop = gst_segment_to_stream_time (&basesink->segment,
1771 basesink->segment.format, basesink->segment.stop);
1774 sstart = sstop = priv->current_sstart;
1775 if (!GST_CLOCK_TIME_IS_VALID (sstart)) {
1776 /* we have not seen a buffer yet, use the segment values */
1777 sstart = sstop = gst_segment_to_stream_time (&basesink->segment,
1778 basesink->segment.format, basesink->segment.start);
1782 rstart = rstop = priv->eos_rtime;
1783 *do_sync = rstart != -1;
1784 GST_DEBUG_OBJECT (basesink, "sync times for EOS %" GST_TIME_FORMAT,
1785 GST_TIME_ARGS (rstart));
1786 /* if we are stepping, we end now */
1787 *step_end = step->valid;
1792 /* other events do not need syncing */
1793 /* FIXME, maybe NEWSEGMENT might need synchronisation
1794 * since the POSITION query depends on accumulated times and
1795 * we cannot accumulate the current segment before the previous
1804 /* else do buffer sync code */
1805 buffer = GST_BUFFER_CAST (obj);
1807 bclass = GST_BASE_SINK_GET_CLASS (basesink);
1809 /* just get the times to see if we need syncing, if the start returns -1 we
1811 if (bclass->get_times)
1812 bclass->get_times (basesink, buffer, &start, &stop);
1814 if (!GST_CLOCK_TIME_IS_VALID (start)) {
1815 /* we don't need to sync but we still want to get the timestamps for
1816 * tracking the position */
1817 gst_base_sink_get_times (basesink, buffer, &start, &stop);
1823 GST_DEBUG_OBJECT (basesink, "got times start: %" GST_TIME_FORMAT
1824 ", stop: %" GST_TIME_FORMAT ", do_sync %d", GST_TIME_ARGS (start),
1825 GST_TIME_ARGS (stop), *do_sync);
1827 /* collect segment and format for code clarity */
1828 format = segment->format;
1830 /* no timestamp clipping if we did not get a TIME segment format */
1831 if (G_UNLIKELY (format != GST_FORMAT_TIME)) {
1834 /* do running and stream time in TIME format */
1835 format = GST_FORMAT_TIME;
1836 GST_LOG_OBJECT (basesink, "not time format, don't clip");
1840 /* clip, only when we know about time */
1841 if (G_UNLIKELY (!gst_segment_clip (segment, GST_FORMAT_TIME,
1842 (gint64) start, (gint64) stop, &cstart, &cstop))) {
1844 GST_DEBUG_OBJECT (basesink, "step out of segment");
1845 /* when we are stepping, pretend we're at the end of the segment */
1846 if (segment->rate > 0.0) {
1847 cstart = segment->stop;
1848 cstop = segment->stop;
1850 cstart = segment->start;
1851 cstop = segment->start;
1855 goto out_of_segment;
1858 if (G_UNLIKELY (start != cstart || stop != cstop)) {
1859 GST_DEBUG_OBJECT (basesink, "clipped to: start %" GST_TIME_FORMAT
1860 ", stop: %" GST_TIME_FORMAT, GST_TIME_ARGS (cstart),
1861 GST_TIME_ARGS (cstop));
1864 /* set last stop position */
1865 if (G_LIKELY (cstop != GST_CLOCK_TIME_NONE))
1866 gst_segment_set_last_stop (segment, GST_FORMAT_TIME, cstop);
1868 gst_segment_set_last_stop (segment, GST_FORMAT_TIME, cstart);
1871 rstart = gst_segment_to_running_time (segment, format, cstart);
1872 rstop = gst_segment_to_running_time (segment, format, cstop);
1874 if (G_UNLIKELY (step->valid)) {
1875 if (!(*step_end = handle_stepping (basesink, segment, step, &cstart, &cstop,
1876 &rstart, &rstop))) {
1877 /* step is still busy, we discard data when we are flushing */
1878 *stepped = step->flush;
1879 GST_DEBUG_OBJECT (basesink, "stepping busy");
1882 /* this can produce wrong values if we accumulated non-TIME segments. If this happens,
1883 * upstream is behaving very badly */
1884 sstart = gst_segment_to_stream_time (segment, format, cstart);
1885 sstop = gst_segment_to_stream_time (segment, format, cstop);
1888 /* eos_done label only called when doing EOS, we also stop stepping then */
1889 if (*step_end && step->flush) {
1890 GST_DEBUG_OBJECT (basesink, "flushing step ended");
1891 stop_stepping (basesink, segment, step, rstart, rstop, eos);
1901 /* buffers and EOS always need syncing and preroll */
1907 /* we usually clip in the chain function already but stepping could cause
1908 * the segment to be updated later. we return FALSE so that we don't try
1910 GST_LOG_OBJECT (basesink, "buffer skipped, not in segment");
1915 /* with STREAM_LOCK, PREROLL_LOCK, LOCK
1916 * adjust a timestamp with the latency and timestamp offset */
1918 gst_base_sink_adjust_time (GstBaseSink * basesink, GstClockTime time)
1920 GstClockTimeDiff ts_offset;
1922 /* don't do anything funny with invalid timestamps */
1923 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time)))
1926 time += basesink->priv->latency;
1928 /* apply offset, be carefull for underflows */
1929 ts_offset = basesink->priv->ts_offset;
1930 if (ts_offset < 0) {
1931 ts_offset = -ts_offset;
1932 if (ts_offset < time)
1943 * gst_base_sink_wait_clock:
1945 * @time: the running_time to be reached
1946 * @jitter: the jitter to be filled with time diff (can be NULL)
1948 * This function will block until @time is reached. It is usually called by
1949 * subclasses that use their own internal synchronisation.
1951 * If @time is not valid, no sycnhronisation is done and #GST_CLOCK_BADTIME is
1952 * returned. Likewise, if synchronisation is disabled in the element or there
1953 * is no clock, no synchronisation is done and #GST_CLOCK_BADTIME is returned.
1955 * This function should only be called with the PREROLL_LOCK held, like when
1956 * receiving an EOS event in the #GstBaseSinkClass.event() vmethod or when
1957 * receiving a buffer in
1958 * the #GstBaseSinkClass.render() vmethod.
1960 * The @time argument should be the running_time of when this method should
1961 * return and is not adjusted with any latency or offset configured in the
1966 * Returns: #GstClockReturn
1969 gst_base_sink_wait_clock (GstBaseSink * sink, GstClockTime time,
1970 GstClockTimeDiff * jitter)
1975 GstClockTime base_time;
1977 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time)))
1980 GST_OBJECT_LOCK (sink);
1981 if (G_UNLIKELY (!sink->sync))
1984 if (G_UNLIKELY ((clock = GST_ELEMENT_CLOCK (sink)) == NULL))
1987 base_time = GST_ELEMENT_CAST (sink)->base_time;
1988 GST_LOG_OBJECT (sink,
1989 "time %" GST_TIME_FORMAT ", base_time %" GST_TIME_FORMAT,
1990 GST_TIME_ARGS (time), GST_TIME_ARGS (base_time));
1992 /* add base_time to running_time to get the time against the clock */
1995 id = gst_clock_new_single_shot_id (clock, time);
1996 GST_OBJECT_UNLOCK (sink);
1998 /* A blocking wait is performed on the clock. We save the ClockID
1999 * so we can unlock the entry at any time. While we are blocking, we
2000 * release the PREROLL_LOCK so that other threads can interrupt the
2002 sink->clock_id = id;
2003 /* release the preroll lock while waiting */
2004 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
2006 ret = gst_clock_id_wait (id, jitter);
2008 GST_PAD_PREROLL_LOCK (sink->sinkpad);
2009 gst_clock_id_unref (id);
2010 sink->clock_id = NULL;
2014 /* no syncing needed */
2017 GST_DEBUG_OBJECT (sink, "time not valid, no sync needed");
2018 return GST_CLOCK_BADTIME;
2022 GST_DEBUG_OBJECT (sink, "sync disabled");
2023 GST_OBJECT_UNLOCK (sink);
2024 return GST_CLOCK_BADTIME;
2028 GST_DEBUG_OBJECT (sink, "no clock, can't sync");
2029 GST_OBJECT_UNLOCK (sink);
2030 return GST_CLOCK_BADTIME;
2035 * gst_base_sink_wait_preroll:
2038 * If the #GstBaseSinkClass.render() method performs its own synchronisation
2039 * against the clock it must unblock when going from PLAYING to the PAUSED state
2040 * and call this method before continuing to render the remaining data.
2042 * This function will block until a state change to PLAYING happens (in which
2043 * case this function returns #GST_FLOW_OK) or the processing must be stopped due
2044 * to a state change to READY or a FLUSH event (in which case this function
2045 * returns #GST_FLOW_WRONG_STATE).
2047 * This function should only be called with the PREROLL_LOCK held, like in the
2052 * Returns: #GST_FLOW_OK if the preroll completed and processing can
2053 * continue. Any other return value should be returned from the render vmethod.
2056 gst_base_sink_wait_preroll (GstBaseSink * sink)
2058 sink->have_preroll = TRUE;
2059 GST_DEBUG_OBJECT (sink, "waiting in preroll for flush or PLAYING");
2060 /* block until the state changes, or we get a flush, or something */
2061 GST_PAD_PREROLL_WAIT (sink->sinkpad);
2062 sink->have_preroll = FALSE;
2063 if (G_UNLIKELY (sink->flushing))
2065 if (G_UNLIKELY (sink->priv->step_unlock))
2067 GST_DEBUG_OBJECT (sink, "continue after preroll");
2074 GST_DEBUG_OBJECT (sink, "preroll interrupted because of flush");
2075 return GST_FLOW_WRONG_STATE;
2079 sink->priv->step_unlock = FALSE;
2080 GST_DEBUG_OBJECT (sink, "preroll interrupted because of step");
2081 return GST_FLOW_STEP;
2086 * gst_base_sink_do_preroll:
2088 * @obj: the object that caused the preroll
2090 * If the @sink spawns its own thread for pulling buffers from upstream it
2091 * should call this method after it has pulled a buffer. If the element needed
2092 * to preroll, this function will perform the preroll and will then block
2093 * until the element state is changed.
2095 * This function should be called with the PREROLL_LOCK held.
2099 * Returns: #GST_FLOW_OK if the preroll completed and processing can
2100 * continue. Any other return value should be returned from the render vmethod.
2103 gst_base_sink_do_preroll (GstBaseSink * sink, GstMiniObject * obj)
2107 while (G_UNLIKELY (sink->need_preroll)) {
2108 GST_DEBUG_OBJECT (sink, "prerolling object %p", obj);
2110 ret = gst_base_sink_preroll_object (sink, FALSE, obj);
2111 if (ret != GST_FLOW_OK)
2112 goto preroll_failed;
2114 /* need to recheck here because the commit state could have
2115 * made us not need the preroll anymore */
2116 if (G_LIKELY (sink->need_preroll)) {
2117 /* block until the state changes, or we get a flush, or something */
2118 ret = gst_base_sink_wait_preroll (sink);
2119 if ((ret != GST_FLOW_OK) && (ret != GST_FLOW_STEP))
2120 goto preroll_failed;
2128 GST_DEBUG_OBJECT (sink, "preroll failed %d", ret);
2134 * gst_base_sink_wait_eos:
2136 * @time: the running_time to be reached
2137 * @jitter: the jitter to be filled with time diff (can be NULL)
2139 * This function will block until @time is reached. It is usually called by
2140 * subclasses that use their own internal synchronisation but want to let the
2141 * EOS be handled by the base class.
2143 * This function should only be called with the PREROLL_LOCK held, like when
2144 * receiving an EOS event in the ::event vmethod.
2146 * The @time argument should be the running_time of when the EOS should happen
2147 * and will be adjusted with any latency and offset configured in the sink.
2151 * Returns: #GstFlowReturn
2154 gst_base_sink_wait_eos (GstBaseSink * sink, GstClockTime time,
2155 GstClockTimeDiff * jitter)
2157 GstClockReturn status;
2163 GST_DEBUG_OBJECT (sink, "checking preroll");
2165 /* first wait for the playing state before we can continue */
2166 if (G_UNLIKELY (sink->need_preroll)) {
2167 ret = gst_base_sink_wait_preroll (sink);
2168 if ((ret != GST_FLOW_OK) && (ret != GST_FLOW_STEP))
2172 /* preroll done, we can sync since we are in PLAYING now. */
2173 GST_DEBUG_OBJECT (sink, "possibly waiting for clock to reach %"
2174 GST_TIME_FORMAT, GST_TIME_ARGS (time));
2176 /* compensate for latency and ts_offset. We don't adjust for render delay
2177 * because we don't interact with the device on EOS normally. */
2178 stime = gst_base_sink_adjust_time (sink, time);
2180 /* wait for the clock, this can be interrupted because we got shut down or
2182 status = gst_base_sink_wait_clock (sink, stime, jitter);
2184 GST_DEBUG_OBJECT (sink, "clock returned %d", status);
2186 /* invalid time, no clock or sync disabled, just continue then */
2187 if (status == GST_CLOCK_BADTIME)
2190 /* waiting could have been interrupted and we can be flushing now */
2191 if (G_UNLIKELY (sink->flushing))
2194 /* retry if we got unscheduled, which means we did not reach the timeout
2195 * yet. if some other error occures, we continue. */
2196 } while (status == GST_CLOCK_UNSCHEDULED);
2198 GST_DEBUG_OBJECT (sink, "end of stream");
2205 GST_DEBUG_OBJECT (sink, "we are flushing");
2206 return GST_FLOW_WRONG_STATE;
2210 /* with STREAM_LOCK, PREROLL_LOCK
2212 * Make sure we are in PLAYING and synchronize an object to the clock.
2214 * If we need preroll, we are not in PLAYING. We try to commit the state
2215 * if needed and then block if we still are not PLAYING.
2217 * We start waiting on the clock in PLAYING. If we got interrupted, we
2218 * immediatly try to re-preroll.
2220 * Some objects do not need synchronisation (most events) and so this function
2221 * immediatly returns GST_FLOW_OK.
2223 * for objects that arrive later than max-lateness to be synchronized to the
2224 * clock have the @late boolean set to TRUE.
2226 * This function keeps a running average of the jitter (the diff between the
2227 * clock time and the requested sync time). The jitter is negative for
2228 * objects that arrive in time and positive for late buffers.
2230 * does not take ownership of obj.
2232 static GstFlowReturn
2233 gst_base_sink_do_sync (GstBaseSink * basesink, GstPad * pad,
2234 GstMiniObject * obj, gboolean * late, gboolean * step_end)
2236 GstClockTimeDiff jitter;
2238 GstClockReturn status = GST_CLOCK_OK;
2239 GstClockTime rstart, rstop, sstart, sstop, stime;
2241 GstBaseSinkPrivate *priv;
2243 GstStepInfo *current, *pending;
2246 priv = basesink->priv;
2249 sstart = sstop = rstart = rstop = GST_CLOCK_TIME_NONE;
2253 priv->current_rstart = GST_CLOCK_TIME_NONE;
2255 /* get stepping info */
2256 current = &priv->current_step;
2257 pending = &priv->pending_step;
2259 /* get timing information for this object against the render segment */
2260 syncable = gst_base_sink_get_sync_times (basesink, obj,
2261 &sstart, &sstop, &rstart, &rstop, &do_sync, &stepped, &basesink->segment,
2264 if (G_UNLIKELY (stepped))
2267 /* a syncable object needs to participate in preroll and
2268 * clocking. All buffers and EOS are syncable. */
2269 if (G_UNLIKELY (!syncable))
2272 /* store timing info for current object */
2273 priv->current_rstart = rstart;
2274 priv->current_rstop = (GST_CLOCK_TIME_IS_VALID (rstop) ? rstop : rstart);
2276 /* save sync time for eos when the previous object needed sync */
2277 priv->eos_rtime = (do_sync ? priv->current_rstop : GST_CLOCK_TIME_NONE);
2280 /* first do preroll, this makes sure we commit our state
2281 * to PAUSED and can continue to PLAYING. We cannot perform
2282 * any clock sync in PAUSED because there is no clock. */
2283 ret = gst_base_sink_do_preroll (basesink, obj);
2284 if (G_UNLIKELY (ret != GST_FLOW_OK))
2285 goto preroll_failed;
2287 /* update the segment with a pending step if the current one is invalid and we
2288 * have a new pending one. We only accept new step updates after a preroll */
2289 if (G_UNLIKELY (pending->valid && !current->valid)) {
2290 start_stepping (basesink, &basesink->segment, pending, current);
2294 /* After rendering we store the position of the last buffer so that we can use
2295 * it to report the position. We need to take the lock here. */
2296 GST_OBJECT_LOCK (basesink);
2297 priv->current_sstart = sstart;
2298 priv->current_sstop = (GST_CLOCK_TIME_IS_VALID (sstop) ? sstop : sstart);
2299 GST_OBJECT_UNLOCK (basesink);
2304 /* adjust for latency */
2305 stime = gst_base_sink_adjust_time (basesink, rstart);
2307 /* adjust for render-delay, avoid underflows */
2308 if (GST_CLOCK_TIME_IS_VALID (stime)) {
2309 if (stime > priv->render_delay)
2310 stime -= priv->render_delay;
2315 /* preroll done, we can sync since we are in PLAYING now. */
2316 GST_DEBUG_OBJECT (basesink, "possibly waiting for clock to reach %"
2317 GST_TIME_FORMAT ", adjusted %" GST_TIME_FORMAT,
2318 GST_TIME_ARGS (rstart), GST_TIME_ARGS (stime));
2320 /* This function will return immediatly if start == -1, no clock
2321 * or sync is disabled with GST_CLOCK_BADTIME. */
2322 status = gst_base_sink_wait_clock (basesink, stime, &jitter);
2324 GST_DEBUG_OBJECT (basesink, "clock returned %d, jitter %" GST_TIME_FORMAT,
2325 status, GST_TIME_ARGS (jitter));
2327 /* invalid time, no clock or sync disabled, just render */
2328 if (status == GST_CLOCK_BADTIME)
2331 /* waiting could have been interrupted and we can be flushing now */
2332 if (G_UNLIKELY (basesink->flushing))
2335 /* check for unlocked by a state change, we are not flushing so
2336 * we can try to preroll on the current buffer. */
2337 if (G_UNLIKELY (status == GST_CLOCK_UNSCHEDULED)) {
2338 GST_DEBUG_OBJECT (basesink, "unscheduled, waiting some more");
2339 priv->call_preroll = TRUE;
2343 /* successful syncing done, record observation */
2344 priv->current_jitter = jitter;
2346 /* check if the object should be dropped */
2347 *late = gst_base_sink_is_too_late (basesink, obj, rstart, rstop,
2356 GST_DEBUG_OBJECT (basesink, "skipped stepped object %p", obj);
2362 GST_DEBUG_OBJECT (basesink, "non syncable object %p", obj);
2367 GST_DEBUG_OBJECT (basesink, "we are flushing");
2368 return GST_FLOW_WRONG_STATE;
2372 GST_DEBUG_OBJECT (basesink, "preroll failed");
2379 gst_base_sink_send_qos (GstBaseSink * basesink,
2380 gdouble proportion, GstClockTime time, GstClockTimeDiff diff)
2385 /* generate Quality-of-Service event */
2386 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, basesink,
2387 "qos: proportion: %lf, diff %" G_GINT64_FORMAT ", timestamp %"
2388 GST_TIME_FORMAT, proportion, diff, GST_TIME_ARGS (time));
2390 event = gst_event_new_qos (proportion, diff, time);
2393 res = gst_pad_push_event (basesink->sinkpad, event);
2399 gst_base_sink_perform_qos (GstBaseSink * sink, gboolean dropped)
2401 GstBaseSinkPrivate *priv;
2402 GstClockTime start, stop;
2403 GstClockTimeDiff jitter;
2404 GstClockTime pt, entered, left;
2405 GstClockTime duration;
2410 start = priv->current_rstart;
2412 if (priv->current_step.valid)
2415 /* if Quality-of-Service disabled, do nothing */
2416 if (!g_atomic_int_get (&priv->qos_enabled) ||
2417 !GST_CLOCK_TIME_IS_VALID (start))
2420 stop = priv->current_rstop;
2421 jitter = priv->current_jitter;
2424 /* this is the time the buffer entered the sink */
2425 if (start < -jitter)
2428 entered = start + jitter;
2431 /* this is the time the buffer entered the sink */
2432 entered = start + jitter;
2433 /* this is the time the buffer left the sink */
2434 left = start + jitter;
2437 /* calculate duration of the buffer */
2438 if (GST_CLOCK_TIME_IS_VALID (stop))
2439 duration = stop - start;
2441 duration = GST_CLOCK_TIME_NONE;
2443 /* if we have the time when the last buffer left us, calculate
2444 * processing time */
2445 if (GST_CLOCK_TIME_IS_VALID (priv->last_left)) {
2446 if (entered > priv->last_left) {
2447 pt = entered - priv->last_left;
2455 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, sink, "start: %" GST_TIME_FORMAT
2456 ", entered %" GST_TIME_FORMAT ", left %" GST_TIME_FORMAT ", pt: %"
2457 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT ",jitter %"
2458 G_GINT64_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (entered),
2459 GST_TIME_ARGS (left), GST_TIME_ARGS (pt), GST_TIME_ARGS (duration),
2462 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, sink, "avg_duration: %" GST_TIME_FORMAT
2463 ", avg_pt: %" GST_TIME_FORMAT ", avg_rate: %g",
2464 GST_TIME_ARGS (priv->avg_duration), GST_TIME_ARGS (priv->avg_pt),
2467 /* collect running averages. for first observations, we copy the
2469 if (!GST_CLOCK_TIME_IS_VALID (priv->avg_duration))
2470 priv->avg_duration = duration;
2472 priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
2474 if (!GST_CLOCK_TIME_IS_VALID (priv->avg_pt))
2477 priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
2479 if (priv->avg_duration != 0)
2481 gst_guint64_to_gdouble (priv->avg_pt) /
2482 gst_guint64_to_gdouble (priv->avg_duration);
2486 if (GST_CLOCK_TIME_IS_VALID (priv->last_left)) {
2487 if (dropped || priv->avg_rate < 0.0) {
2488 priv->avg_rate = rate;
2491 priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
2493 priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
2497 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, sink,
2498 "updated: avg_duration: %" GST_TIME_FORMAT ", avg_pt: %" GST_TIME_FORMAT
2499 ", avg_rate: %g", GST_TIME_ARGS (priv->avg_duration),
2500 GST_TIME_ARGS (priv->avg_pt), priv->avg_rate);
2503 if (priv->avg_rate >= 0.0) {
2504 /* if we have a valid rate, start sending QoS messages */
2505 if (priv->current_jitter < 0) {
2506 /* make sure we never go below 0 when adding the jitter to the
2508 if (priv->current_rstart < -priv->current_jitter)
2509 priv->current_jitter = -priv->current_rstart;
2511 gst_base_sink_send_qos (sink, priv->avg_rate, priv->current_rstart,
2512 priv->current_jitter);
2515 /* record when this buffer will leave us */
2516 priv->last_left = left;
2519 /* reset all qos measuring */
2521 gst_base_sink_reset_qos (GstBaseSink * sink)
2523 GstBaseSinkPrivate *priv;
2527 priv->last_in_time = GST_CLOCK_TIME_NONE;
2528 priv->last_left = GST_CLOCK_TIME_NONE;
2529 priv->avg_duration = GST_CLOCK_TIME_NONE;
2530 priv->avg_pt = GST_CLOCK_TIME_NONE;
2531 priv->avg_rate = -1.0;
2532 priv->avg_render = GST_CLOCK_TIME_NONE;
2538 /* Checks if the object was scheduled too late.
2540 * start/stop contain the raw timestamp start and stop values
2543 * status and jitter contain the return values from the clock wait.
2545 * returns TRUE if the buffer was too late.
2548 gst_base_sink_is_too_late (GstBaseSink * basesink, GstMiniObject * obj,
2549 GstClockTime start, GstClockTime stop,
2550 GstClockReturn status, GstClockTimeDiff jitter)
2553 gint64 max_lateness;
2554 GstBaseSinkPrivate *priv;
2556 priv = basesink->priv;
2560 /* only for objects that were too late */
2561 if (G_LIKELY (status != GST_CLOCK_EARLY))
2564 max_lateness = basesink->abidata.ABI.max_lateness;
2566 /* check if frame dropping is enabled */
2567 if (max_lateness == -1)
2570 /* only check for buffers */
2571 if (G_UNLIKELY (!GST_IS_BUFFER (obj)))
2574 /* can't do check if we don't have a timestamp */
2575 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (start)))
2578 /* we can add a valid stop time */
2579 if (GST_CLOCK_TIME_IS_VALID (stop))
2580 max_lateness += stop;
2582 max_lateness += start;
2584 /* if the jitter bigger than duration and lateness we are too late */
2585 if ((late = start + jitter > max_lateness)) {
2586 GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, basesink,
2587 "buffer is too late %" GST_TIME_FORMAT
2588 " > %" GST_TIME_FORMAT, GST_TIME_ARGS (start + jitter),
2589 GST_TIME_ARGS (max_lateness));
2590 /* !!emergency!!, if we did not receive anything valid for more than a
2591 * second, render it anyway so the user sees something */
2592 if (GST_CLOCK_TIME_IS_VALID (priv->last_in_time) &&
2593 start - priv->last_in_time > GST_SECOND) {
2595 GST_ELEMENT_WARNING (basesink, CORE, CLOCK,
2596 (_("A lot of buffers are being dropped.")),
2597 ("There may be a timestamping problem, or this computer is too slow."));
2598 GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, basesink,
2599 "**emergency** last buffer at %" GST_TIME_FORMAT " > GST_SECOND",
2600 GST_TIME_ARGS (priv->last_in_time));
2605 if (!late || !GST_CLOCK_TIME_IS_VALID (priv->last_in_time)) {
2606 priv->last_in_time = start;
2613 GST_DEBUG_OBJECT (basesink, "object was scheduled in time");
2618 GST_DEBUG_OBJECT (basesink, "frame dropping disabled");
2623 GST_DEBUG_OBJECT (basesink, "object is not a buffer");
2628 GST_DEBUG_OBJECT (basesink, "buffer has no timestamp");
2633 /* called before and after calling the render vmethod. It keeps track of how
2634 * much time was spent in the render method and is used to check if we are
2637 gst_base_sink_do_render_stats (GstBaseSink * basesink, gboolean start)
2639 GstBaseSinkPrivate *priv;
2641 priv = basesink->priv;
2644 priv->start = gst_util_get_timestamp ();
2646 GstClockTime elapsed;
2648 priv->stop = gst_util_get_timestamp ();
2650 elapsed = GST_CLOCK_DIFF (priv->start, priv->stop);
2652 if (!GST_CLOCK_TIME_IS_VALID (priv->avg_render))
2653 priv->avg_render = elapsed;
2655 priv->avg_render = UPDATE_RUNNING_AVG (priv->avg_render, elapsed);
2657 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, basesink,
2658 "avg_render: %" GST_TIME_FORMAT, GST_TIME_ARGS (priv->avg_render));
2662 /* with STREAM_LOCK, PREROLL_LOCK,
2664 * Synchronize the object on the clock and then render it.
2666 * takes ownership of obj.
2668 static GstFlowReturn
2669 gst_base_sink_render_object (GstBaseSink * basesink, GstPad * pad,
2670 gboolean is_list, gpointer obj)
2673 GstBaseSinkClass *bclass;
2674 gboolean late, step_end;
2677 GstBaseSinkPrivate *priv;
2679 priv = basesink->priv;
2683 * If buffer list, use the first group buffer within the list
2686 sync_obj = gst_buffer_list_get (GST_BUFFER_LIST_CAST (obj), 0, 0);
2687 g_assert (NULL != sync_obj);
2696 /* synchronize this object, non syncable objects return OK
2698 ret = gst_base_sink_do_sync (basesink, pad, sync_obj, &late, &step_end);
2699 if (G_UNLIKELY (ret != GST_FLOW_OK))
2702 /* and now render, event or buffer/buffer list. */
2703 if (G_LIKELY (is_list || GST_IS_BUFFER (obj))) {
2704 /* drop late buffers unconditionally, let's hope it's unlikely */
2705 if (G_UNLIKELY (late))
2708 bclass = GST_BASE_SINK_GET_CLASS (basesink);
2710 if (G_LIKELY ((is_list && bclass->render_list) ||
2711 (!is_list && bclass->render))) {
2714 /* read once, to get same value before and after */
2715 do_qos = g_atomic_int_get (&priv->qos_enabled);
2717 GST_DEBUG_OBJECT (basesink, "rendering object %p", obj);
2719 /* record rendering time for QoS and stats */
2721 gst_base_sink_do_render_stats (basesink, TRUE);
2726 /* For buffer lists do not set last buffer. Creating buffer
2727 * with meaningful data can be done only with memcpy which will
2728 * significantly affect performance */
2729 buf = GST_BUFFER_CAST (obj);
2730 gst_base_sink_set_last_buffer (basesink, buf);
2732 ret = bclass->render (basesink, buf);
2734 GstBufferList *buflist;
2736 buflist = GST_BUFFER_LIST_CAST (obj);
2738 ret = bclass->render_list (basesink, buflist);
2742 gst_base_sink_do_render_stats (basesink, FALSE);
2744 if (ret == GST_FLOW_STEP)
2747 if (G_UNLIKELY (basesink->flushing))
2753 GstEvent *event = GST_EVENT_CAST (obj);
2754 gboolean event_res = TRUE;
2757 bclass = GST_BASE_SINK_GET_CLASS (basesink);
2759 type = GST_EVENT_TYPE (event);
2761 GST_DEBUG_OBJECT (basesink, "rendering event %p, type %s", obj,
2762 gst_event_type_get_name (type));
2765 event_res = bclass->event (basesink, event);
2767 /* when we get here we could be flushing again when the event handler calls
2768 * _wait_eos(). We have to ignore this object in that case. */
2769 if (G_UNLIKELY (basesink->flushing))
2772 if (G_LIKELY (event_res)) {
2775 seqnum = basesink->priv->seqnum = gst_event_get_seqnum (event);
2776 GST_DEBUG_OBJECT (basesink, "Got seqnum #%" G_GUINT32_FORMAT, seqnum);
2781 GstMessage *message;
2783 /* the EOS event is completely handled so we mark
2784 * ourselves as being in the EOS state. eos is also
2785 * protected by the object lock so we can read it when
2786 * answering the POSITION query. */
2787 GST_OBJECT_LOCK (basesink);
2788 basesink->eos = TRUE;
2789 GST_OBJECT_UNLOCK (basesink);
2791 /* ok, now we can post the message */
2792 GST_DEBUG_OBJECT (basesink, "Now posting EOS");
2794 message = gst_message_new_eos (GST_OBJECT_CAST (basesink));
2795 gst_message_set_seqnum (message, seqnum);
2796 gst_element_post_message (GST_ELEMENT_CAST (basesink), message);
2799 case GST_EVENT_NEWSEGMENT:
2800 /* configure the segment */
2801 gst_base_sink_configure_segment (basesink, pad, event,
2802 &basesink->segment);
2804 case GST_EVENT_SINK_MESSAGE:{
2805 GstMessage *msg = NULL;
2807 gst_event_parse_sink_message (event, &msg);
2810 gst_element_post_message (GST_ELEMENT_CAST (basesink), msg);
2820 /* the step ended, check if we need to activate a new step */
2821 GST_DEBUG_OBJECT (basesink, "step ended");
2822 stop_stepping (basesink, &basesink->segment, &priv->current_step,
2823 priv->current_rstart, priv->current_rstop, basesink->eos);
2827 gst_base_sink_perform_qos (basesink, late);
2829 GST_DEBUG_OBJECT (basesink, "object unref after render %p", obj);
2830 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
2836 GST_DEBUG_OBJECT (basesink, "do_sync returned %s", gst_flow_get_name (ret));
2842 GST_DEBUG_OBJECT (basesink, "buffer late, dropping");
2844 if (g_atomic_int_get (&priv->qos_enabled)) {
2845 GstMessage *qos_msg;
2846 GstClockTime timestamp, duration;
2848 timestamp = GST_BUFFER_TIMESTAMP (GST_BUFFER_CAST (sync_obj));
2849 duration = GST_BUFFER_DURATION (GST_BUFFER_CAST (sync_obj));
2851 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, basesink,
2852 "qos: dropped buffer rt %" GST_TIME_FORMAT ", st %" GST_TIME_FORMAT
2853 ", ts %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT,
2854 GST_TIME_ARGS (priv->current_rstart),
2855 GST_TIME_ARGS (priv->current_sstart), GST_TIME_ARGS (timestamp),
2856 GST_TIME_ARGS (duration));
2857 GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, basesink,
2858 "qos: rendered %" G_GUINT64_FORMAT ", dropped %" G_GUINT64_FORMAT,
2859 priv->rendered, priv->dropped);
2862 gst_message_new_qos (GST_OBJECT_CAST (basesink), basesink->sync,
2863 priv->current_rstart, priv->current_sstart, timestamp, duration);
2864 gst_message_set_qos_values (qos_msg, priv->current_jitter, priv->avg_rate,
2866 gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS, priv->rendered,
2868 gst_element_post_message (GST_ELEMENT_CAST (basesink), qos_msg);
2874 GST_DEBUG_OBJECT (basesink, "we are flushing, ignore object");
2875 gst_mini_object_unref (obj);
2876 return GST_FLOW_WRONG_STATE;
2880 /* with STREAM_LOCK, PREROLL_LOCK
2882 * Perform preroll on the given object. For buffers this means
2883 * calling the preroll subclass method.
2884 * If that succeeds, the state will be commited.
2886 * function does not take ownership of obj.
2888 static GstFlowReturn
2889 gst_base_sink_preroll_object (GstBaseSink * basesink, gboolean is_list,
2890 GstMiniObject * obj)
2894 GST_DEBUG_OBJECT (basesink, "prerolling object %p", obj);
2896 /* if it's a buffer, we need to call the preroll method */
2897 if (G_LIKELY (is_list || GST_IS_BUFFER (obj)) && basesink->priv->call_preroll) {
2898 GstBaseSinkClass *bclass;
2900 GstClockTime timestamp;
2903 buf = gst_buffer_list_get (GST_BUFFER_LIST_CAST (obj), 0, 0);
2904 g_assert (NULL != buf);
2906 buf = GST_BUFFER_CAST (obj);
2909 timestamp = GST_BUFFER_TIMESTAMP (buf);
2911 GST_DEBUG_OBJECT (basesink, "preroll buffer %" GST_TIME_FORMAT,
2912 GST_TIME_ARGS (timestamp));
2915 * For buffer lists do not set last buffer. Creating buffer
2916 * with meaningful data can be done only with memcpy which will
2917 * significantly affect performance
2920 gst_base_sink_set_last_buffer (basesink, buf);
2923 bclass = GST_BASE_SINK_GET_CLASS (basesink);
2924 if (bclass->preroll)
2925 if ((ret = bclass->preroll (basesink, buf)) != GST_FLOW_OK)
2926 goto preroll_failed;
2928 basesink->priv->call_preroll = FALSE;
2932 if (G_LIKELY (basesink->playing_async)) {
2933 if (G_UNLIKELY (!gst_base_sink_commit_state (basesink)))
2942 GST_DEBUG_OBJECT (basesink, "preroll failed, abort state");
2943 gst_element_abort_state (GST_ELEMENT_CAST (basesink));
2948 GST_DEBUG_OBJECT (basesink, "stopping while commiting state");
2949 return GST_FLOW_WRONG_STATE;
2953 /* with STREAM_LOCK, PREROLL_LOCK
2955 * Queue an object for rendering.
2956 * The first prerollable object queued will complete the preroll. If the
2957 * preroll queue if filled, we render all the objects in the queue.
2959 * This function takes ownership of the object.
2961 static GstFlowReturn
2962 gst_base_sink_queue_object_unlocked (GstBaseSink * basesink, GstPad * pad,
2963 gboolean is_list, gpointer obj, gboolean prerollable)
2965 GstFlowReturn ret = GST_FLOW_OK;
2969 if (G_UNLIKELY (basesink->need_preroll)) {
2970 if (G_LIKELY (prerollable))
2971 basesink->preroll_queued++;
2973 length = basesink->preroll_queued;
2975 GST_DEBUG_OBJECT (basesink, "now %d prerolled items", length);
2977 /* first prerollable item needs to finish the preroll */
2979 ret = gst_base_sink_preroll_object (basesink, is_list, obj);
2980 if (G_UNLIKELY (ret != GST_FLOW_OK))
2981 goto preroll_failed;
2983 /* need to recheck if we need preroll, commmit state during preroll
2984 * could have made us not need more preroll. */
2985 if (G_UNLIKELY (basesink->need_preroll)) {
2986 /* see if we can render now, if we can't add the object to the preroll
2988 if (G_UNLIKELY (length <= basesink->preroll_queue_max_len))
2992 /* we can start rendering (or blocking) the queued object
2994 q = basesink->preroll_queue;
2995 while (G_UNLIKELY (!g_queue_is_empty (q))) {
2998 o = g_queue_pop_head (q);
2999 GST_DEBUG_OBJECT (basesink, "rendering queued object %p", o);
3001 /* do something with the return value */
3002 ret = gst_base_sink_render_object (basesink, pad, FALSE, o);
3003 if (ret != GST_FLOW_OK)
3004 goto dequeue_failed;
3007 /* now render the object */
3008 ret = gst_base_sink_render_object (basesink, pad, is_list, obj);
3009 basesink->preroll_queued = 0;
3016 GST_DEBUG_OBJECT (basesink, "preroll failed, reason %s",
3017 gst_flow_get_name (ret));
3018 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3023 /* add object to the queue and return */
3024 GST_DEBUG_OBJECT (basesink, "need more preroll data %d <= %d",
3025 length, basesink->preroll_queue_max_len);
3026 g_queue_push_tail (basesink->preroll_queue, obj);
3031 GST_DEBUG_OBJECT (basesink, "rendering queued objects failed, reason %s",
3032 gst_flow_get_name (ret));
3033 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3040 * This function grabs the PREROLL_LOCK and adds the object to
3043 * This function takes ownership of obj.
3045 static GstFlowReturn
3046 gst_base_sink_queue_object (GstBaseSink * basesink, GstPad * pad,
3047 GstMiniObject * obj, gboolean prerollable)
3051 GST_PAD_PREROLL_LOCK (pad);
3052 if (G_UNLIKELY (basesink->flushing))
3055 if (G_UNLIKELY (basesink->priv->received_eos))
3059 gst_base_sink_queue_object_unlocked (basesink, pad, FALSE, obj,
3061 GST_PAD_PREROLL_UNLOCK (pad);
3068 GST_DEBUG_OBJECT (basesink, "sink is flushing");
3069 GST_PAD_PREROLL_UNLOCK (pad);
3070 gst_mini_object_unref (obj);
3071 return GST_FLOW_WRONG_STATE;
3075 GST_DEBUG_OBJECT (basesink,
3076 "we are EOS, dropping object, return UNEXPECTED");
3077 GST_PAD_PREROLL_UNLOCK (pad);
3078 gst_mini_object_unref (obj);
3079 return GST_FLOW_UNEXPECTED;
3084 gst_base_sink_flush_start (GstBaseSink * basesink, GstPad * pad)
3086 /* make sure we are not blocked on the clock also clear any pending
3088 gst_base_sink_set_flushing (basesink, pad, TRUE);
3090 /* we grab the stream lock but that is not needed since setting the
3091 * sink to flushing would make sure no state commit is being done
3093 GST_PAD_STREAM_LOCK (pad);
3094 gst_base_sink_reset_qos (basesink);
3095 if (basesink->priv->async_enabled) {
3096 /* and we need to commit our state again on the next
3097 * prerolled buffer */
3098 basesink->playing_async = TRUE;
3099 gst_element_lost_state (GST_ELEMENT_CAST (basesink));
3101 basesink->priv->have_latency = TRUE;
3102 basesink->need_preroll = FALSE;
3104 gst_base_sink_set_last_buffer (basesink, NULL);
3105 GST_PAD_STREAM_UNLOCK (pad);
3109 gst_base_sink_flush_stop (GstBaseSink * basesink, GstPad * pad)
3111 /* unset flushing so we can accept new data, this also flushes out any EOS
3113 gst_base_sink_set_flushing (basesink, pad, FALSE);
3115 /* for position reporting */
3116 GST_OBJECT_LOCK (basesink);
3117 basesink->priv->current_sstart = GST_CLOCK_TIME_NONE;
3118 basesink->priv->current_sstop = GST_CLOCK_TIME_NONE;
3119 basesink->priv->eos_rtime = GST_CLOCK_TIME_NONE;
3120 basesink->priv->call_preroll = TRUE;
3121 basesink->priv->current_step.valid = FALSE;
3122 basesink->priv->pending_step.valid = FALSE;
3123 if (basesink->pad_mode == GST_ACTIVATE_PUSH) {
3124 /* we need new segment info after the flush. */
3125 basesink->have_newsegment = FALSE;
3126 gst_segment_init (&basesink->segment, GST_FORMAT_UNDEFINED);
3127 gst_segment_init (basesink->abidata.ABI.clip_segment, GST_FORMAT_UNDEFINED);
3129 GST_OBJECT_UNLOCK (basesink);
3133 gst_base_sink_event (GstPad * pad, GstEvent * event)
3135 GstBaseSink *basesink;
3136 gboolean result = TRUE;
3137 GstBaseSinkClass *bclass;
3139 basesink = GST_BASE_SINK (gst_pad_get_parent (pad));
3141 bclass = GST_BASE_SINK_GET_CLASS (basesink);
3143 GST_DEBUG_OBJECT (basesink, "event %p (%s)", event,
3144 GST_EVENT_TYPE_NAME (event));
3146 switch (GST_EVENT_TYPE (event)) {
3151 GST_PAD_PREROLL_LOCK (pad);
3152 if (G_UNLIKELY (basesink->flushing))
3155 if (G_UNLIKELY (basesink->priv->received_eos)) {
3156 /* we can't accept anything when we are EOS */
3158 gst_event_unref (event);
3160 /* we set the received EOS flag here so that we can use it when testing if
3161 * we are prerolled and to refuse more buffers. */
3162 basesink->priv->received_eos = TRUE;
3164 /* EOS is a prerollable object, we call the unlocked version because it
3165 * does not check the received_eos flag. */
3166 ret = gst_base_sink_queue_object_unlocked (basesink, pad,
3167 FALSE, GST_MINI_OBJECT_CAST (event), TRUE);
3168 if (G_UNLIKELY (ret != GST_FLOW_OK))
3171 GST_PAD_PREROLL_UNLOCK (pad);
3174 case GST_EVENT_NEWSEGMENT:
3179 GST_DEBUG_OBJECT (basesink, "newsegment %p", event);
3181 GST_PAD_PREROLL_LOCK (pad);
3182 if (G_UNLIKELY (basesink->flushing))
3185 gst_event_parse_new_segment_full (event, &update, NULL, NULL, NULL, NULL,
3188 if (G_UNLIKELY (basesink->priv->received_eos && !update)) {
3189 /* we can't accept anything when we are EOS */
3191 gst_event_unref (event);
3193 /* the new segment is a non prerollable item and does not block anything,
3194 * we need to configure the current clipping segment and insert the event
3195 * in the queue to serialize it with the buffers for rendering. */
3196 gst_base_sink_configure_segment (basesink, pad, event,
3197 basesink->abidata.ABI.clip_segment);
3200 gst_base_sink_queue_object_unlocked (basesink, pad,
3201 FALSE, GST_MINI_OBJECT_CAST (event), FALSE);
3202 if (G_UNLIKELY (ret != GST_FLOW_OK))
3205 GST_OBJECT_LOCK (basesink);
3206 basesink->have_newsegment = TRUE;
3207 GST_OBJECT_UNLOCK (basesink);
3210 GST_PAD_PREROLL_UNLOCK (pad);
3213 case GST_EVENT_FLUSH_START:
3215 bclass->event (basesink, event);
3217 GST_DEBUG_OBJECT (basesink, "flush-start %p", event);
3219 gst_base_sink_flush_start (basesink, pad);
3221 gst_event_unref (event);
3223 case GST_EVENT_FLUSH_STOP:
3225 bclass->event (basesink, event);
3227 GST_DEBUG_OBJECT (basesink, "flush-stop %p", event);
3229 gst_base_sink_flush_stop (basesink, pad);
3231 gst_event_unref (event);
3234 /* other events are sent to queue or subclass depending on if they
3235 * are serialized. */
3236 if (GST_EVENT_IS_SERIALIZED (event)) {
3237 gst_base_sink_queue_object (basesink, pad,
3238 GST_MINI_OBJECT_CAST (event), FALSE);
3241 bclass->event (basesink, event);
3242 gst_event_unref (event);
3247 gst_object_unref (basesink);
3254 GST_DEBUG_OBJECT (basesink, "we are flushing");
3255 GST_PAD_PREROLL_UNLOCK (pad);
3257 gst_event_unref (event);
3262 /* default implementation to calculate the start and end
3263 * timestamps on a buffer, subclasses can override
3266 gst_base_sink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
3267 GstClockTime * start, GstClockTime * end)
3269 GstClockTime timestamp, duration;
3271 timestamp = GST_BUFFER_TIMESTAMP (buffer);
3272 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
3274 /* get duration to calculate end time */
3275 duration = GST_BUFFER_DURATION (buffer);
3276 if (GST_CLOCK_TIME_IS_VALID (duration)) {
3277 *end = timestamp + duration;
3283 /* must be called with PREROLL_LOCK */
3285 gst_base_sink_needs_preroll (GstBaseSink * basesink)
3287 gboolean is_prerolled, res;
3289 /* we have 2 cases where the PREROLL_LOCK is released:
3290 * 1) we are blocking in the PREROLL_LOCK and thus are prerolled.
3291 * 2) we are syncing on the clock
3293 is_prerolled = basesink->have_preroll || basesink->priv->received_eos;
3294 res = !is_prerolled;
3296 GST_DEBUG_OBJECT (basesink, "have_preroll: %d, EOS: %d => needs preroll: %d",
3297 basesink->have_preroll, basesink->priv->received_eos, res);
3302 /* with STREAM_LOCK, PREROLL_LOCK
3304 * Takes a buffer and compare the timestamps with the last segment.
3305 * If the buffer falls outside of the segment boundaries, drop it.
3306 * Else queue the buffer for preroll and rendering.
3308 * This function takes ownership of the buffer.
3310 static GstFlowReturn
3311 gst_base_sink_chain_unlocked (GstBaseSink * basesink, GstPad * pad,
3312 gboolean is_list, gpointer obj)
3314 GstBaseSinkClass *bclass;
3315 GstFlowReturn result;
3316 GstClockTime start = GST_CLOCK_TIME_NONE, end = GST_CLOCK_TIME_NONE;
3317 GstSegment *clip_segment;
3318 GstBuffer *time_buf;
3320 if (G_UNLIKELY (basesink->flushing))
3323 if (G_UNLIKELY (basesink->priv->received_eos))
3327 time_buf = gst_buffer_list_get (GST_BUFFER_LIST_CAST (obj), 0, 0);
3328 g_assert (NULL != time_buf);
3330 time_buf = GST_BUFFER_CAST (obj);
3333 /* for code clarity */
3334 clip_segment = basesink->abidata.ABI.clip_segment;
3336 if (G_UNLIKELY (!basesink->have_newsegment)) {
3339 sync = gst_base_sink_get_sync (basesink);
3341 GST_ELEMENT_WARNING (basesink, STREAM, FAILED,
3342 (_("Internal data flow problem.")),
3343 ("Received buffer without a new-segment. Assuming timestamps start from 0."));
3346 /* this means this sink will assume timestamps start from 0 */
3347 GST_OBJECT_LOCK (basesink);
3348 clip_segment->start = 0;
3349 clip_segment->stop = -1;
3350 basesink->segment.start = 0;
3351 basesink->segment.stop = -1;
3352 basesink->have_newsegment = TRUE;
3353 GST_OBJECT_UNLOCK (basesink);
3356 bclass = GST_BASE_SINK_GET_CLASS (basesink);
3358 /* check if the buffer needs to be dropped, we first ask the subclass for the
3360 if (bclass->get_times)
3361 bclass->get_times (basesink, time_buf, &start, &end);
3363 if (!GST_CLOCK_TIME_IS_VALID (start)) {
3364 /* if the subclass does not want sync, we use our own values so that we at
3365 * least clip the buffer to the segment */
3366 gst_base_sink_get_times (basesink, time_buf, &start, &end);
3369 GST_DEBUG_OBJECT (basesink, "got times start: %" GST_TIME_FORMAT
3370 ", end: %" GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (end));
3372 /* a dropped buffer does not participate in anything */
3373 if (GST_CLOCK_TIME_IS_VALID (start) &&
3374 (clip_segment->format == GST_FORMAT_TIME)) {
3375 if (G_UNLIKELY (!gst_segment_clip (clip_segment,
3376 GST_FORMAT_TIME, (gint64) start, (gint64) end, NULL, NULL)))
3377 goto out_of_segment;
3380 /* now we can process the buffer in the queue, this function takes ownership
3382 result = gst_base_sink_queue_object_unlocked (basesink, pad,
3383 is_list, obj, TRUE);
3389 GST_DEBUG_OBJECT (basesink, "sink is flushing");
3390 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3391 return GST_FLOW_WRONG_STATE;
3395 GST_DEBUG_OBJECT (basesink,
3396 "we are EOS, dropping object, return UNEXPECTED");
3397 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3398 return GST_FLOW_UNEXPECTED;
3402 GST_DEBUG_OBJECT (basesink, "dropping buffer, out of clipping segment");
3403 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3410 static GstFlowReturn
3411 gst_base_sink_chain_main (GstBaseSink * basesink, GstPad * pad,
3412 gboolean is_list, gpointer obj)
3414 GstFlowReturn result;
3416 if (G_UNLIKELY (basesink->pad_mode != GST_ACTIVATE_PUSH))
3419 GST_PAD_PREROLL_LOCK (pad);
3420 result = gst_base_sink_chain_unlocked (basesink, pad, is_list, obj);
3421 GST_PAD_PREROLL_UNLOCK (pad);
3429 GST_OBJECT_LOCK (pad);
3430 GST_WARNING_OBJECT (basesink,
3431 "Push on pad %s:%s, but it was not activated in push mode",
3432 GST_DEBUG_PAD_NAME (pad));
3433 GST_OBJECT_UNLOCK (pad);
3434 gst_mini_object_unref (GST_MINI_OBJECT_CAST (obj));
3435 /* we don't post an error message this will signal to the peer
3436 * pushing that EOS is reached. */
3437 result = GST_FLOW_UNEXPECTED;
3442 static GstFlowReturn
3443 gst_base_sink_chain (GstPad * pad, GstBuffer * buf)
3445 GstBaseSink *basesink;
3447 basesink = GST_BASE_SINK (GST_OBJECT_PARENT (pad));
3449 return gst_base_sink_chain_main (basesink, pad, FALSE, buf);
3452 static GstFlowReturn
3453 gst_base_sink_chain_list (GstPad * pad, GstBufferList * list)
3455 GstBaseSink *basesink;
3456 GstBaseSinkClass *bclass;
3457 GstFlowReturn result;
3459 basesink = GST_BASE_SINK (GST_OBJECT_PARENT (pad));
3460 bclass = GST_BASE_SINK_GET_CLASS (basesink);
3462 if (G_LIKELY (bclass->render_list)) {
3463 result = gst_base_sink_chain_main (basesink, pad, TRUE, list);
3465 GstBufferListIterator *it;
3468 GST_INFO_OBJECT (pad, "chaining each group in list as a merged buffer");
3470 it = gst_buffer_list_iterate (list);
3472 if (gst_buffer_list_iterator_next_group (it)) {
3474 group = gst_buffer_list_iterator_merge_group (it);
3475 if (group == NULL) {
3476 group = gst_buffer_new ();
3477 GST_CAT_INFO_OBJECT (GST_CAT_SCHEDULING, pad, "chaining empty group");
3479 GST_CAT_INFO_OBJECT (GST_CAT_SCHEDULING, pad, "chaining group");
3481 result = gst_base_sink_chain_main (basesink, pad, FALSE, group);
3482 } while (result == GST_FLOW_OK
3483 && gst_buffer_list_iterator_next_group (it));
3485 GST_CAT_INFO_OBJECT (GST_CAT_SCHEDULING, pad, "chaining empty group");
3487 gst_base_sink_chain_main (basesink, pad, FALSE, gst_buffer_new ());
3489 gst_buffer_list_iterator_free (it);
3490 gst_buffer_list_unref (list);
3497 gst_base_sink_default_do_seek (GstBaseSink * sink, GstSegment * segment)
3499 gboolean res = TRUE;
3501 /* update our offset if the start/stop position was updated */
3502 if (segment->format == GST_FORMAT_BYTES) {
3503 segment->time = segment->start;
3504 } else if (segment->start == 0) {
3505 /* seek to start, we can implement a default for this. */
3509 GST_INFO_OBJECT (sink, "Can't do a default seek");
3515 #define SEEK_TYPE_IS_RELATIVE(t) (((t) != GST_SEEK_TYPE_NONE) && ((t) != GST_SEEK_TYPE_SET))
3518 gst_base_sink_default_prepare_seek_segment (GstBaseSink * sink,
3519 GstEvent * event, GstSegment * segment)
3521 /* By default, we try one of 2 things:
3522 * - For absolute seek positions, convert the requested position to our
3523 * configured processing format and place it in the output segment \
3524 * - For relative seek positions, convert our current (input) values to the
3525 * seek format, adjust by the relative seek offset and then convert back to
3526 * the processing format
3528 GstSeekType cur_type, stop_type;
3531 GstFormat seek_format, dest_format;
3534 gboolean res = TRUE;
3536 gst_event_parse_seek (event, &rate, &seek_format, &flags,
3537 &cur_type, &cur, &stop_type, &stop);
3538 dest_format = segment->format;
3540 if (seek_format == dest_format) {
3541 gst_segment_set_seek (segment, rate, seek_format, flags,
3542 cur_type, cur, stop_type, stop, &update);
3546 if (cur_type != GST_SEEK_TYPE_NONE) {
3547 /* FIXME: Handle seek_cur & seek_end by converting the input segment vals */
3549 gst_pad_query_convert (sink->sinkpad, seek_format, cur, &dest_format,
3551 cur_type = GST_SEEK_TYPE_SET;
3554 if (res && stop_type != GST_SEEK_TYPE_NONE) {
3555 /* FIXME: Handle seek_cur & seek_end by converting the input segment vals */
3557 gst_pad_query_convert (sink->sinkpad, seek_format, stop, &dest_format,
3559 stop_type = GST_SEEK_TYPE_SET;
3562 /* And finally, configure our output segment in the desired format */
3563 gst_segment_set_seek (segment, rate, dest_format, flags, cur_type, cur,
3564 stop_type, stop, &update);
3573 GST_DEBUG_OBJECT (sink, "undefined format given, seek aborted.");
3578 /* perform a seek, only executed in pull mode */
3580 gst_base_sink_perform_seek (GstBaseSink * sink, GstPad * pad, GstEvent * event)
3584 GstFormat seek_format, dest_format;
3586 GstSeekType cur_type, stop_type;
3587 gboolean seekseg_configured = FALSE;
3589 gboolean update, res = TRUE;
3590 GstSegment seeksegment;
3592 dest_format = sink->segment.format;
3595 GST_DEBUG_OBJECT (sink, "performing seek with event %p", event);
3596 gst_event_parse_seek (event, &rate, &seek_format, &flags,
3597 &cur_type, &cur, &stop_type, &stop);
3599 flush = flags & GST_SEEK_FLAG_FLUSH;
3601 GST_DEBUG_OBJECT (sink, "performing seek without event");
3606 GST_DEBUG_OBJECT (sink, "flushing upstream");
3607 gst_pad_push_event (pad, gst_event_new_flush_start ());
3608 gst_base_sink_flush_start (sink, pad);
3610 GST_DEBUG_OBJECT (sink, "pausing pulling thread");
3613 GST_PAD_STREAM_LOCK (pad);
3615 /* If we configured the seeksegment above, don't overwrite it now. Otherwise
3616 * copy the current segment info into the temp segment that we can actually
3617 * attempt the seek with. We only update the real segment if the seek suceeds. */
3618 if (!seekseg_configured) {
3619 memcpy (&seeksegment, &sink->segment, sizeof (GstSegment));
3621 /* now configure the final seek segment */
3623 if (sink->segment.format != seek_format) {
3624 /* OK, here's where we give the subclass a chance to convert the relative
3625 * seek into an absolute one in the processing format. We set up any
3626 * absolute seek above, before taking the stream lock. */
3627 if (!gst_base_sink_default_prepare_seek_segment (sink, event,
3629 GST_DEBUG_OBJECT (sink,
3630 "Preparing the seek failed after flushing. " "Aborting seek");
3634 /* The seek format matches our processing format, no need to ask the
3635 * the subclass to configure the segment. */
3636 gst_segment_set_seek (&seeksegment, rate, seek_format, flags,
3637 cur_type, cur, stop_type, stop, &update);
3640 /* Else, no seek event passed, so we're just (re)starting the
3645 GST_DEBUG_OBJECT (sink, "segment configured from %" G_GINT64_FORMAT
3646 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
3647 seeksegment.start, seeksegment.stop, seeksegment.last_stop);
3649 /* do the seek, segment.last_stop contains the new position. */
3650 res = gst_base_sink_default_do_seek (sink, &seeksegment);
3655 GST_DEBUG_OBJECT (sink, "stop flushing upstream");
3656 gst_pad_push_event (pad, gst_event_new_flush_stop ());
3657 gst_base_sink_flush_stop (sink, pad);
3658 } else if (res && sink->abidata.ABI.running) {
3659 /* we are running the current segment and doing a non-flushing seek,
3660 * close the segment first based on the last_stop. */
3661 GST_DEBUG_OBJECT (sink, "closing running segment %" G_GINT64_FORMAT
3662 " to %" G_GINT64_FORMAT, sink->segment.start, sink->segment.last_stop);
3665 /* The subclass must have converted the segment to the processing format
3667 if (res && seeksegment.format != dest_format) {
3668 GST_DEBUG_OBJECT (sink, "Subclass failed to prepare a seek segment "
3669 "in the correct format. Aborting seek.");
3673 /* if successfull seek, we update our real segment and push
3674 * out the new segment. */
3676 memcpy (&sink->segment, &seeksegment, sizeof (GstSegment));
3678 if (sink->segment.flags & GST_SEEK_FLAG_SEGMENT) {
3679 gst_element_post_message (GST_ELEMENT (sink),
3680 gst_message_new_segment_start (GST_OBJECT (sink),
3681 sink->segment.format, sink->segment.last_stop));
3685 sink->priv->discont = TRUE;
3686 sink->abidata.ABI.running = TRUE;
3688 GST_PAD_STREAM_UNLOCK (pad);
3694 set_step_info (GstBaseSink * sink, GstStepInfo * current, GstStepInfo * pending,
3695 guint seqnum, GstFormat format, guint64 amount, gdouble rate,
3696 gboolean flush, gboolean intermediate)
3698 GST_OBJECT_LOCK (sink);
3699 pending->seqnum = seqnum;
3700 pending->format = format;
3701 pending->amount = amount;
3702 pending->position = 0;
3703 pending->rate = rate;
3704 pending->flush = flush;
3705 pending->intermediate = intermediate;
3706 pending->valid = TRUE;
3707 /* flush invalidates the current stepping segment */
3709 current->valid = FALSE;
3710 GST_OBJECT_UNLOCK (sink);
3714 gst_base_sink_perform_step (GstBaseSink * sink, GstPad * pad, GstEvent * event)
3716 GstBaseSinkPrivate *priv;
3717 GstBaseSinkClass *bclass;
3718 gboolean flush, intermediate;
3723 GstStepInfo *pending, *current;
3724 GstMessage *message;
3726 bclass = GST_BASE_SINK_GET_CLASS (sink);
3729 GST_DEBUG_OBJECT (sink, "performing step with event %p", event);
3731 gst_event_parse_step (event, &format, &amount, &rate, &flush, &intermediate);
3732 seqnum = gst_event_get_seqnum (event);
3734 pending = &priv->pending_step;
3735 current = &priv->current_step;
3737 /* post message first */
3738 message = gst_message_new_step_start (GST_OBJECT (sink), FALSE, format,
3739 amount, rate, flush, intermediate);
3740 gst_message_set_seqnum (message, seqnum);
3741 gst_element_post_message (GST_ELEMENT (sink), message);
3744 /* we need to call ::unlock before locking PREROLL_LOCK
3745 * since we lock it before going into ::render */
3747 bclass->unlock (sink);
3749 GST_PAD_PREROLL_LOCK (sink->sinkpad);
3750 /* now that we have the PREROLL lock, clear our unlock request */
3751 if (bclass->unlock_stop)
3752 bclass->unlock_stop (sink);
3754 /* update the stepinfo and make it valid */
3755 set_step_info (sink, current, pending, seqnum, format, amount, rate, flush,
3758 if (sink->priv->async_enabled) {
3759 /* and we need to commit our state again on the next
3760 * prerolled buffer */
3761 sink->playing_async = TRUE;
3762 priv->pending_step.need_preroll = TRUE;
3763 sink->need_preroll = FALSE;
3764 gst_element_lost_state_full (GST_ELEMENT_CAST (sink), FALSE);
3766 sink->priv->have_latency = TRUE;
3767 sink->need_preroll = FALSE;
3769 priv->current_sstart = GST_CLOCK_TIME_NONE;
3770 priv->current_sstop = GST_CLOCK_TIME_NONE;
3771 priv->eos_rtime = GST_CLOCK_TIME_NONE;
3772 priv->call_preroll = TRUE;
3773 gst_base_sink_set_last_buffer (sink, NULL);
3774 gst_base_sink_reset_qos (sink);
3776 if (sink->clock_id) {
3777 gst_clock_id_unschedule (sink->clock_id);
3780 if (sink->have_preroll) {
3781 GST_DEBUG_OBJECT (sink, "signal waiter");
3782 priv->step_unlock = TRUE;
3783 GST_PAD_PREROLL_SIGNAL (sink->sinkpad);
3785 GST_PAD_PREROLL_UNLOCK (sink->sinkpad);
3787 /* update the stepinfo and make it valid */
3788 set_step_info (sink, current, pending, seqnum, format, amount, rate, flush,
3798 gst_base_sink_loop (GstPad * pad)
3800 GstBaseSink *basesink;
3801 GstBuffer *buf = NULL;
3802 GstFlowReturn result;
3806 basesink = GST_BASE_SINK (GST_OBJECT_PARENT (pad));
3808 g_assert (basesink->pad_mode == GST_ACTIVATE_PULL);
3810 if ((blocksize = basesink->priv->blocksize) == 0)
3813 offset = basesink->segment.last_stop;
3815 GST_DEBUG_OBJECT (basesink, "pulling %" G_GUINT64_FORMAT ", %u",
3818 result = gst_pad_pull_range (pad, offset, blocksize, &buf);
3819 if (G_UNLIKELY (result != GST_FLOW_OK))
3822 if (G_UNLIKELY (buf == NULL))
3825 offset += GST_BUFFER_SIZE (buf);
3827 gst_segment_set_last_stop (&basesink->segment, GST_FORMAT_BYTES, offset);
3829 GST_PAD_PREROLL_LOCK (pad);
3830 result = gst_base_sink_chain_unlocked (basesink, pad, FALSE, buf);
3831 GST_PAD_PREROLL_UNLOCK (pad);
3832 if (G_UNLIKELY (result != GST_FLOW_OK))
3840 GST_LOG_OBJECT (basesink, "pausing task, reason %s",
3841 gst_flow_get_name (result));
3842 gst_pad_pause_task (pad);
3843 /* fatal errors and NOT_LINKED cause EOS */
3844 if (GST_FLOW_IS_FATAL (result) || result == GST_FLOW_NOT_LINKED) {
3845 if (result == GST_FLOW_UNEXPECTED) {
3846 /* perform EOS logic */
3847 if (basesink->segment.flags & GST_SEEK_FLAG_SEGMENT) {
3848 gst_element_post_message (GST_ELEMENT_CAST (basesink),
3849 gst_message_new_segment_done (GST_OBJECT_CAST (basesink),
3850 basesink->segment.format, basesink->segment.last_stop));
3852 gst_base_sink_event (pad, gst_event_new_eos ());
3855 /* for fatal errors we post an error message, post the error
3856 * first so the app knows about the error first. */
3857 GST_ELEMENT_ERROR (basesink, STREAM, FAILED,
3858 (_("Internal data stream error.")),
3859 ("stream stopped, reason %s", gst_flow_get_name (result)));
3860 gst_base_sink_event (pad, gst_event_new_eos ());
3867 GST_LOG_OBJECT (basesink, "no buffer, pausing");
3868 GST_ELEMENT_ERROR (basesink, STREAM, FAILED,
3869 (_("Internal data flow error.")), ("element returned NULL buffer"));
3870 result = GST_FLOW_ERROR;
3876 gst_base_sink_set_flushing (GstBaseSink * basesink, GstPad * pad,
3879 GstBaseSinkClass *bclass;
3881 bclass = GST_BASE_SINK_GET_CLASS (basesink);
3884 /* unlock any subclasses, we need to do this before grabbing the
3885 * PREROLL_LOCK since we hold this lock before going into ::render. */
3887 bclass->unlock (basesink);
3890 GST_PAD_PREROLL_LOCK (pad);
3891 basesink->flushing = flushing;
3893 /* step 1, now that we have the PREROLL lock, clear our unlock request */
3894 if (bclass->unlock_stop)
3895 bclass->unlock_stop (basesink);
3897 /* set need_preroll before we unblock the clock. If the clock is unblocked
3898 * before timing out, we can reuse the buffer for preroll. */
3899 basesink->need_preroll = TRUE;
3901 /* step 2, unblock clock sync (if any) or any other blocking thing */
3902 if (basesink->clock_id) {
3903 gst_clock_id_unschedule (basesink->clock_id);
3906 /* flush out the data thread if it's locked in finish_preroll, this will
3907 * also flush out the EOS state */
3908 GST_DEBUG_OBJECT (basesink,
3909 "flushing out data thread, need preroll to TRUE");
3910 gst_base_sink_preroll_queue_flush (basesink, pad);
3912 GST_PAD_PREROLL_UNLOCK (pad);
3918 gst_base_sink_default_activate_pull (GstBaseSink * basesink, gboolean active)
3924 result = gst_pad_start_task (basesink->sinkpad,
3925 (GstTaskFunction) gst_base_sink_loop, basesink->sinkpad);
3927 /* step 2, make sure streaming finishes */
3928 result = gst_pad_stop_task (basesink->sinkpad);
3935 gst_base_sink_pad_activate (GstPad * pad)
3937 gboolean result = FALSE;
3938 GstBaseSink *basesink;
3940 basesink = GST_BASE_SINK (gst_pad_get_parent (pad));
3942 GST_DEBUG_OBJECT (basesink, "Trying pull mode first");
3944 gst_base_sink_set_flushing (basesink, pad, FALSE);
3946 /* we need to have the pull mode enabled */
3947 if (!basesink->can_activate_pull) {
3948 GST_DEBUG_OBJECT (basesink, "pull mode disabled");
3952 /* check if downstreams supports pull mode at all */
3953 if (!gst_pad_check_pull_range (pad)) {
3954 GST_DEBUG_OBJECT (basesink, "pull mode not supported");
3958 /* set the pad mode before starting the task so that it's in the
3959 * correct state for the new thread. also the sink set_caps and get_caps
3960 * function checks this */
3961 basesink->pad_mode = GST_ACTIVATE_PULL;
3963 /* we first try to negotiate a format so that when we try to activate
3964 * downstream, it knows about our format */
3965 if (!gst_base_sink_negotiate_pull (basesink)) {
3966 GST_DEBUG_OBJECT (basesink, "failed to negotiate in pull mode");
3970 /* ok activate now */
3971 if (!gst_pad_activate_pull (pad, TRUE)) {
3972 /* clear any pending caps */
3973 GST_OBJECT_LOCK (basesink);
3974 gst_caps_replace (&basesink->priv->pull_caps, NULL);
3975 GST_OBJECT_UNLOCK (basesink);
3976 GST_DEBUG_OBJECT (basesink, "failed to activate in pull mode");
3980 GST_DEBUG_OBJECT (basesink, "Success activating pull mode");
3984 /* push mode fallback */
3986 GST_DEBUG_OBJECT (basesink, "Falling back to push mode");
3987 if ((result = gst_pad_activate_push (pad, TRUE))) {
3988 GST_DEBUG_OBJECT (basesink, "Success activating push mode");
3993 GST_WARNING_OBJECT (basesink, "Could not activate pad in either mode");
3994 gst_base_sink_set_flushing (basesink, pad, TRUE);
3997 gst_object_unref (basesink);
4003 gst_base_sink_pad_activate_push (GstPad * pad, gboolean active)
4006 GstBaseSink *basesink;
4008 basesink = GST_BASE_SINK (gst_pad_get_parent (pad));
4011 if (!basesink->can_activate_push) {
4013 basesink->pad_mode = GST_ACTIVATE_NONE;
4016 basesink->pad_mode = GST_ACTIVATE_PUSH;
4019 if (G_UNLIKELY (basesink->pad_mode != GST_ACTIVATE_PUSH)) {
4020 g_warning ("Internal GStreamer activation error!!!");
4023 gst_base_sink_set_flushing (basesink, pad, TRUE);
4025 basesink->pad_mode = GST_ACTIVATE_NONE;
4029 gst_object_unref (basesink);
4035 gst_base_sink_negotiate_pull (GstBaseSink * basesink)
4042 /* this returns the intersection between our caps and the peer caps. If there
4043 * is no peer, it returns NULL and we can't operate in pull mode so we can
4044 * fail the negotiation. */
4045 caps = gst_pad_get_allowed_caps (GST_BASE_SINK_PAD (basesink));
4046 if (caps == NULL || gst_caps_is_empty (caps))
4047 goto no_caps_possible;
4049 GST_DEBUG_OBJECT (basesink, "allowed caps: %" GST_PTR_FORMAT, caps);
4051 caps = gst_caps_make_writable (caps);
4052 /* get the first (prefered) format */
4053 gst_caps_truncate (caps);
4055 gst_pad_fixate_caps (GST_BASE_SINK_PAD (basesink), caps);
4057 GST_DEBUG_OBJECT (basesink, "fixated to: %" GST_PTR_FORMAT, caps);
4059 if (gst_caps_is_any (caps)) {
4060 GST_DEBUG_OBJECT (basesink, "caps were ANY after fixating, "
4062 /* neither side has template caps in this case, so they are prepared for
4063 pull() without setcaps() */
4065 } else if (gst_caps_is_fixed (caps)) {
4066 if (!gst_pad_set_caps (GST_BASE_SINK_PAD (basesink), caps))
4067 goto could_not_set_caps;
4069 GST_OBJECT_LOCK (basesink);
4070 gst_caps_replace (&basesink->priv->pull_caps, caps);
4071 GST_OBJECT_UNLOCK (basesink);
4076 gst_caps_unref (caps);
4082 GST_INFO_OBJECT (basesink, "Pipeline could not agree on caps");
4083 GST_DEBUG_OBJECT (basesink, "get_allowed_caps() returned EMPTY");
4085 gst_caps_unref (caps);
4090 GST_INFO_OBJECT (basesink, "Could not set caps: %" GST_PTR_FORMAT, caps);
4091 gst_caps_unref (caps);
4096 /* this won't get called until we implement an activate function */
4098 gst_base_sink_pad_activate_pull (GstPad * pad, gboolean active)
4100 gboolean result = FALSE;
4101 GstBaseSink *basesink;
4102 GstBaseSinkClass *bclass;
4104 basesink = GST_BASE_SINK (gst_pad_get_parent (pad));
4105 bclass = GST_BASE_SINK_GET_CLASS (basesink);
4111 /* we mark we have a newsegment here because pull based
4112 * mode works just fine without having a newsegment before the
4114 format = GST_FORMAT_BYTES;
4116 gst_segment_init (&basesink->segment, format);
4117 gst_segment_init (basesink->abidata.ABI.clip_segment, format);
4118 GST_OBJECT_LOCK (basesink);
4119 basesink->have_newsegment = TRUE;
4120 GST_OBJECT_UNLOCK (basesink);
4122 /* get the peer duration in bytes */
4123 result = gst_pad_query_peer_duration (pad, &format, &duration);
4125 GST_DEBUG_OBJECT (basesink,
4126 "setting duration in bytes to %" G_GINT64_FORMAT, duration);
4127 gst_segment_set_duration (basesink->abidata.ABI.clip_segment, format,
4129 gst_segment_set_duration (&basesink->segment, format, duration);
4131 GST_DEBUG_OBJECT (basesink, "unknown duration");
4134 if (bclass->activate_pull)
4135 result = bclass->activate_pull (basesink, TRUE);
4140 goto activate_failed;
4143 if (G_UNLIKELY (basesink->pad_mode != GST_ACTIVATE_PULL)) {
4144 g_warning ("Internal GStreamer activation error!!!");
4147 result = gst_base_sink_set_flushing (basesink, pad, TRUE);
4148 if (bclass->activate_pull)
4149 result &= bclass->activate_pull (basesink, FALSE);
4150 basesink->pad_mode = GST_ACTIVATE_NONE;
4151 /* clear any pending caps */
4152 GST_OBJECT_LOCK (basesink);
4153 gst_caps_replace (&basesink->priv->pull_caps, NULL);
4154 GST_OBJECT_UNLOCK (basesink);
4157 gst_object_unref (basesink);
4164 /* reset, as starting the thread failed */
4165 basesink->pad_mode = GST_ACTIVATE_NONE;
4167 GST_ERROR_OBJECT (basesink, "subclass failed to activate in pull mode");
4172 /* send an event to our sinkpad peer. */
4174 gst_base_sink_send_event (GstElement * element, GstEvent * event)
4177 GstBaseSink *basesink = GST_BASE_SINK (element);
4178 gboolean forward, result = TRUE;
4179 GstActivateMode mode;
4181 GST_OBJECT_LOCK (element);
4182 /* get the pad and the scheduling mode */
4183 pad = gst_object_ref (basesink->sinkpad);
4184 mode = basesink->pad_mode;
4185 GST_OBJECT_UNLOCK (element);
4187 /* only push UPSTREAM events upstream */
4188 forward = GST_EVENT_IS_UPSTREAM (event);
4190 switch (GST_EVENT_TYPE (event)) {
4191 case GST_EVENT_LATENCY:
4193 GstClockTime latency;
4195 gst_event_parse_latency (event, &latency);
4197 /* store the latency. We use this to adjust the running_time before syncing
4198 * it to the clock. */
4199 GST_OBJECT_LOCK (element);
4200 basesink->priv->latency = latency;
4201 if (!basesink->priv->have_latency)
4203 GST_OBJECT_UNLOCK (element);
4204 GST_DEBUG_OBJECT (basesink, "latency set to %" GST_TIME_FORMAT,
4205 GST_TIME_ARGS (latency));
4207 /* We forward this event so that all elements know about the global pipeline
4208 * latency. This is interesting for an element when it wants to figure out
4209 * when a particular piece of data will be rendered. */
4212 case GST_EVENT_SEEK:
4213 /* in pull mode we will execute the seek */
4214 if (mode == GST_ACTIVATE_PULL)
4215 result = gst_base_sink_perform_seek (basesink, pad, event);
4217 case GST_EVENT_STEP:
4218 result = gst_base_sink_perform_step (basesink, pad, event);
4226 result = gst_pad_push_event (pad, event);
4228 /* not forwarded, unref the event */
4229 gst_event_unref (event);
4232 gst_object_unref (pad);
4236 /* get the end position of the last seen object, this is used
4237 * for EOS and for making sure that we don't report a position we
4238 * have not reached yet. With LOCK. */
4240 gst_base_sink_get_position_last (GstBaseSink * basesink, GstFormat format,
4241 gint64 * cur, gboolean * upstream)
4244 GstSegment *segment;
4245 gboolean ret = TRUE;
4247 segment = &basesink->segment;
4248 oformat = segment->format;
4250 if (oformat == GST_FORMAT_TIME) {
4251 /* return last observed stream time, we keep the stream time around in the
4253 *cur = basesink->priv->current_sstop;
4255 /* convert last stop to stream time */
4256 *cur = gst_segment_to_stream_time (segment, oformat, segment->last_stop);
4259 if (*cur != -1 && oformat != format) {
4260 GST_OBJECT_UNLOCK (basesink);
4261 /* convert to the target format if we need to, release lock first */
4263 gst_pad_query_convert (basesink->sinkpad, oformat, *cur, &format, cur);
4268 GST_OBJECT_LOCK (basesink);
4271 GST_DEBUG_OBJECT (basesink, "POSITION: %" GST_TIME_FORMAT,
4272 GST_TIME_ARGS (*cur));
4277 /* get the position when we are PAUSED, this is the stream time of the buffer
4278 * that prerolled. If no buffer is prerolled (we are still flushing), this
4279 * value will be -1. With LOCK. */
4281 gst_base_sink_get_position_paused (GstBaseSink * basesink, GstFormat format,
4282 gint64 * cur, gboolean * upstream)
4286 GstSegment *segment;
4289 /* we don't use the clip segment in pull mode, when seeking we update the
4290 * main segment directly with the new segment values without it having to be
4291 * activated by the rendering after preroll */
4292 if (basesink->pad_mode == GST_ACTIVATE_PUSH)
4293 segment = basesink->abidata.ABI.clip_segment;
4295 segment = &basesink->segment;
4296 oformat = segment->format;
4298 if (oformat == GST_FORMAT_TIME) {
4299 *cur = basesink->priv->current_sstart;
4300 if (segment->rate < 0.0 &&
4301 GST_CLOCK_TIME_IS_VALID (basesink->priv->current_sstop)) {
4302 /* for reverse playback we prefer the stream time stop position if we have
4304 *cur = basesink->priv->current_sstop;
4307 *cur = gst_segment_to_stream_time (segment, oformat, segment->last_stop);
4310 time = segment->time;
4313 *cur = MAX (*cur, time);
4314 GST_DEBUG_OBJECT (basesink, "POSITION as max: %" GST_TIME_FORMAT
4315 ", time %" GST_TIME_FORMAT, GST_TIME_ARGS (*cur), GST_TIME_ARGS (time));
4317 /* we have no buffer, use the segment times. */
4318 if (segment->rate >= 0.0) {
4319 /* forward, next position is always the time of the segment */
4321 GST_DEBUG_OBJECT (basesink, "POSITION as time: %" GST_TIME_FORMAT,
4322 GST_TIME_ARGS (*cur));
4324 /* reverse, next expected timestamp is segment->stop. We use the function
4325 * to get things right for negative applied_rates. */
4326 *cur = gst_segment_to_stream_time (segment, oformat, segment->stop);
4327 GST_DEBUG_OBJECT (basesink, "reverse POSITION: %" GST_TIME_FORMAT,
4328 GST_TIME_ARGS (*cur));
4333 if (res && oformat != format) {
4334 GST_OBJECT_UNLOCK (basesink);
4336 gst_pad_query_convert (basesink->sinkpad, oformat, *cur, &format, cur);
4341 GST_OBJECT_LOCK (basesink);
4348 gst_base_sink_get_position (GstBaseSink * basesink, GstFormat format,
4349 gint64 * cur, gboolean * upstream)
4352 gboolean res = FALSE;
4353 GstFormat oformat, tformat;
4354 GstClockTime now, latency;
4355 GstClockTimeDiff base;
4356 gint64 time, accum, duration;
4360 GST_OBJECT_LOCK (basesink);
4361 /* our intermediate time format */
4362 tformat = GST_FORMAT_TIME;
4363 /* get the format in the segment */
4364 oformat = basesink->segment.format;
4366 /* can only give answer based on the clock if not EOS */
4367 if (G_UNLIKELY (basesink->eos))
4370 /* we can only get the segment when we are not NULL or READY */
4371 if (!basesink->have_newsegment)
4374 /* when not in PLAYING or when we're busy with a state change, we
4375 * cannot read from the clock so we report time based on the
4376 * last seen timestamp. */
4377 if (GST_STATE (basesink) != GST_STATE_PLAYING ||
4378 GST_STATE_PENDING (basesink) != GST_STATE_VOID_PENDING)
4381 /* we need to sync on the clock. */
4382 if (basesink->sync == FALSE)
4385 /* and we need a clock */
4386 if (G_UNLIKELY ((clock = GST_ELEMENT_CLOCK (basesink)) == NULL))
4389 /* collect all data we need holding the lock */
4390 if (GST_CLOCK_TIME_IS_VALID (basesink->segment.time))
4391 time = basesink->segment.time;
4395 if (GST_CLOCK_TIME_IS_VALID (basesink->segment.stop))
4396 duration = basesink->segment.stop - basesink->segment.start;
4400 base = GST_ELEMENT_CAST (basesink)->base_time;
4401 accum = basesink->segment.accum;
4402 rate = basesink->segment.rate * basesink->segment.applied_rate;
4403 latency = basesink->priv->latency;
4405 gst_object_ref (clock);
4407 /* this function might release the LOCK */
4408 gst_base_sink_get_position_last (basesink, format, &last, upstream);
4410 /* need to release the object lock before we can get the time,
4411 * a clock might take the LOCK of the provider, which could be
4412 * a basesink subclass. */
4413 GST_OBJECT_UNLOCK (basesink);
4415 now = gst_clock_get_time (clock);
4417 if (oformat != tformat) {
4418 /* convert accum, time and duration to time */
4419 if (!gst_pad_query_convert (basesink->sinkpad, oformat, accum, &tformat,
4421 goto convert_failed;
4422 if (!gst_pad_query_convert (basesink->sinkpad, oformat, duration, &tformat,
4424 goto convert_failed;
4425 if (!gst_pad_query_convert (basesink->sinkpad, oformat, time, &tformat,
4427 goto convert_failed;
4430 /* subtract base time and accumulated time from the clock time.
4431 * Make sure we don't go negative. This is the current time in
4432 * the segment which we need to scale with the combined
4433 * rate and applied rate. */
4436 if (GST_CLOCK_DIFF (base, now) < 0)
4439 /* for negative rates we need to count back from the segment
4444 *cur = time + gst_guint64_to_gdouble (now - base) * rate;
4446 /* never report more than last seen position */
4448 *cur = MIN (last, *cur);
4450 gst_object_unref (clock);
4452 GST_DEBUG_OBJECT (basesink,
4453 "now %" GST_TIME_FORMAT " - base %" GST_TIME_FORMAT " - accum %"
4454 GST_TIME_FORMAT " + time %" GST_TIME_FORMAT,
4455 GST_TIME_ARGS (now), GST_TIME_ARGS (base),
4456 GST_TIME_ARGS (accum), GST_TIME_ARGS (time));
4458 if (oformat != format) {
4459 /* convert time to final format */
4460 if (!gst_pad_query_convert (basesink->sinkpad, tformat, *cur, &format, cur))
4461 goto convert_failed;
4467 GST_DEBUG_OBJECT (basesink, "res: %d, POSITION: %" GST_TIME_FORMAT,
4468 res, GST_TIME_ARGS (*cur));
4474 GST_DEBUG_OBJECT (basesink, "position in EOS");
4475 res = gst_base_sink_get_position_last (basesink, format, cur, upstream);
4476 GST_OBJECT_UNLOCK (basesink);
4481 GST_DEBUG_OBJECT (basesink, "position in PAUSED");
4482 res = gst_base_sink_get_position_paused (basesink, format, cur, upstream);
4483 GST_OBJECT_UNLOCK (basesink);
4488 /* in NULL or READY we always return FALSE and -1 */
4489 GST_DEBUG_OBJECT (basesink, "position in wrong state, return -1");
4492 GST_OBJECT_UNLOCK (basesink);
4497 /* report last seen timestamp if any, else ask upstream to answer */
4498 if ((*cur = basesink->priv->current_sstart) != -1)
4503 GST_DEBUG_OBJECT (basesink, "no sync, res %d, POSITION %" GST_TIME_FORMAT,
4504 res, GST_TIME_ARGS (*cur));
4505 GST_OBJECT_UNLOCK (basesink);
4510 GST_DEBUG_OBJECT (basesink, "convert failed, try upstream");
4517 gst_base_sink_get_duration (GstBaseSink * basesink, GstFormat format,
4518 gint64 * dur, gboolean * upstream)
4520 gboolean res = FALSE;
4522 if (basesink->pad_mode == GST_ACTIVATE_PULL) {
4523 GstFormat uformat = GST_FORMAT_BYTES;
4526 /* get the duration in bytes, in pull mode that's all we are sure to
4527 * know. We have to explicitly get this value from upstream instead of
4528 * using our cached value because it might change. Duration caching
4529 * should be done at a higher level. */
4530 res = gst_pad_query_peer_duration (basesink->sinkpad, &uformat, &uduration);
4532 gst_segment_set_duration (&basesink->segment, uformat, uduration);
4533 if (format != uformat) {
4534 /* convert to the requested format */
4535 res = gst_pad_query_convert (basesink->sinkpad, uformat, uduration,
4550 gst_base_sink_query (GstElement * element, GstQuery * query)
4552 gboolean res = FALSE;
4554 GstBaseSink *basesink = GST_BASE_SINK (element);
4556 switch (GST_QUERY_TYPE (query)) {
4557 case GST_QUERY_POSITION:
4561 gboolean upstream = FALSE;
4563 gst_query_parse_position (query, &format, NULL);
4565 GST_DEBUG_OBJECT (basesink, "position query in format %s",
4566 gst_format_get_name (format));
4568 /* first try to get the position based on the clock */
4570 gst_base_sink_get_position (basesink, format, &cur, &upstream))) {
4571 gst_query_set_position (query, format, cur);
4572 } else if (upstream) {
4573 /* fallback to peer query */
4574 res = gst_pad_peer_query (basesink->sinkpad, query);
4577 /* we can handle a few things if upstream failed */
4578 if (format == GST_FORMAT_PERCENT) {
4580 GstFormat uformat = GST_FORMAT_TIME;
4582 res = gst_base_sink_get_position (basesink, GST_FORMAT_TIME, &cur,
4584 if (!res && upstream) {
4585 res = gst_pad_query_peer_position (basesink->sinkpad, &uformat,
4589 res = gst_base_sink_get_duration (basesink, GST_FORMAT_TIME, &dur,
4591 if (!res && upstream) {
4592 res = gst_pad_query_peer_duration (basesink->sinkpad, &uformat,
4599 pos = gst_util_uint64_scale (100 * GST_FORMAT_PERCENT_SCALE, cur,
4601 gst_query_set_position (query, GST_FORMAT_PERCENT, pos);
4607 case GST_QUERY_DURATION:
4611 gboolean upstream = FALSE;
4613 gst_query_parse_duration (query, &format, NULL);
4615 GST_DEBUG_OBJECT (basesink, "duration query in format %s",
4616 gst_format_get_name (format));
4619 gst_base_sink_get_duration (basesink, format, &dur, &upstream))) {
4620 gst_query_set_duration (query, format, dur);
4621 } else if (upstream) {
4622 /* fallback to peer query */
4623 res = gst_pad_peer_query (basesink->sinkpad, query);
4626 /* we can handle a few things if upstream failed */
4627 if (format == GST_FORMAT_PERCENT) {
4628 gst_query_set_duration (query, GST_FORMAT_PERCENT,
4629 GST_FORMAT_PERCENT_MAX);
4635 case GST_QUERY_LATENCY:
4637 gboolean live, us_live;
4638 GstClockTime min, max;
4640 if ((res = gst_base_sink_query_latency (basesink, &live, &us_live, &min,
4642 gst_query_set_latency (query, live, min, max);
4646 case GST_QUERY_JITTER:
4648 case GST_QUERY_RATE:
4649 /* gst_query_set_rate (query, basesink->segment_rate); */
4652 case GST_QUERY_SEGMENT:
4654 /* FIXME, bring start/stop to stream time */
4655 gst_query_set_segment (query, basesink->segment.rate,
4656 GST_FORMAT_TIME, basesink->segment.start, basesink->segment.stop);
4659 case GST_QUERY_SEEKING:
4660 case GST_QUERY_CONVERT:
4661 case GST_QUERY_FORMATS:
4663 res = gst_pad_peer_query (basesink->sinkpad, query);
4666 GST_DEBUG_OBJECT (basesink, "query %s returns %d",
4667 GST_QUERY_TYPE_NAME (query), res);
4671 static GstStateChangeReturn
4672 gst_base_sink_change_state (GstElement * element, GstStateChange transition)
4674 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
4675 GstBaseSink *basesink = GST_BASE_SINK (element);
4676 GstBaseSinkClass *bclass;
4677 GstBaseSinkPrivate *priv;
4679 priv = basesink->priv;
4681 bclass = GST_BASE_SINK_GET_CLASS (basesink);
4683 switch (transition) {
4684 case GST_STATE_CHANGE_NULL_TO_READY:
4686 if (!bclass->start (basesink))
4689 case GST_STATE_CHANGE_READY_TO_PAUSED:
4690 /* need to complete preroll before this state change completes, there
4691 * is no data flow in READY so we can safely assume we need to preroll. */
4692 GST_PAD_PREROLL_LOCK (basesink->sinkpad);
4693 GST_DEBUG_OBJECT (basesink, "READY to PAUSED");
4694 basesink->have_newsegment = FALSE;
4695 gst_segment_init (&basesink->segment, GST_FORMAT_UNDEFINED);
4696 gst_segment_init (basesink->abidata.ABI.clip_segment,
4697 GST_FORMAT_UNDEFINED);
4698 basesink->offset = 0;
4699 basesink->have_preroll = FALSE;
4700 priv->step_unlock = FALSE;
4701 basesink->need_preroll = TRUE;
4702 basesink->playing_async = TRUE;
4703 priv->current_sstart = GST_CLOCK_TIME_NONE;
4704 priv->current_sstop = GST_CLOCK_TIME_NONE;
4705 priv->eos_rtime = GST_CLOCK_TIME_NONE;
4707 basesink->eos = FALSE;
4708 priv->received_eos = FALSE;
4709 gst_base_sink_reset_qos (basesink);
4710 priv->commited = FALSE;
4711 priv->call_preroll = TRUE;
4712 priv->current_step.valid = FALSE;
4713 priv->pending_step.valid = FALSE;
4714 if (priv->async_enabled) {
4715 GST_DEBUG_OBJECT (basesink, "doing async state change");
4716 /* when async enabled, post async-start message and return ASYNC from
4717 * the state change function */
4718 ret = GST_STATE_CHANGE_ASYNC;
4719 gst_element_post_message (GST_ELEMENT_CAST (basesink),
4720 gst_message_new_async_start (GST_OBJECT_CAST (basesink), FALSE));
4722 priv->have_latency = TRUE;
4724 GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
4726 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
4727 GST_PAD_PREROLL_LOCK (basesink->sinkpad);
4728 if (!gst_base_sink_needs_preroll (basesink)) {
4729 GST_DEBUG_OBJECT (basesink, "PAUSED to PLAYING, don't need preroll");
4730 /* no preroll needed anymore now. */
4731 basesink->playing_async = FALSE;
4732 basesink->need_preroll = FALSE;
4733 if (basesink->eos) {
4734 GstMessage *message;
4736 /* need to post EOS message here */
4737 GST_DEBUG_OBJECT (basesink, "Now posting EOS");
4738 message = gst_message_new_eos (GST_OBJECT_CAST (basesink));
4739 gst_message_set_seqnum (message, basesink->priv->seqnum);
4740 gst_element_post_message (GST_ELEMENT_CAST (basesink), message);
4742 GST_DEBUG_OBJECT (basesink, "signal preroll");
4743 GST_PAD_PREROLL_SIGNAL (basesink->sinkpad);
4746 GST_DEBUG_OBJECT (basesink, "PAUSED to PLAYING, we are not prerolled");
4747 basesink->need_preroll = TRUE;
4748 basesink->playing_async = TRUE;
4749 priv->call_preroll = TRUE;
4750 priv->commited = FALSE;
4751 if (priv->async_enabled) {
4752 GST_DEBUG_OBJECT (basesink, "doing async state change");
4753 ret = GST_STATE_CHANGE_ASYNC;
4754 gst_element_post_message (GST_ELEMENT_CAST (basesink),
4755 gst_message_new_async_start (GST_OBJECT_CAST (basesink), FALSE));
4758 GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
4765 GstStateChangeReturn bret;
4767 bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
4768 if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
4769 goto activate_failed;
4772 switch (transition) {
4773 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
4774 GST_DEBUG_OBJECT (basesink, "PLAYING to PAUSED");
4775 /* FIXME, make sure we cannot enter _render first */
4777 /* we need to call ::unlock before locking PREROLL_LOCK
4778 * since we lock it before going into ::render */
4780 bclass->unlock (basesink);
4782 GST_PAD_PREROLL_LOCK (basesink->sinkpad);
4783 GST_DEBUG_OBJECT (basesink, "got preroll lock");
4784 /* now that we have the PREROLL lock, clear our unlock request */
4785 if (bclass->unlock_stop)
4786 bclass->unlock_stop (basesink);
4788 /* we need preroll again and we set the flag before unlocking the clockid
4789 * because if the clockid is unlocked before a current buffer expired, we
4790 * can use that buffer to preroll with */
4791 basesink->need_preroll = TRUE;
4793 if (basesink->clock_id) {
4794 GST_DEBUG_OBJECT (basesink, "unschedule clock");
4795 gst_clock_id_unschedule (basesink->clock_id);
4798 /* if we don't have a preroll buffer we need to wait for a preroll and
4800 if (!gst_base_sink_needs_preroll (basesink)) {
4801 GST_DEBUG_OBJECT (basesink, "PLAYING to PAUSED, we are prerolled");
4802 basesink->playing_async = FALSE;
4804 if (GST_STATE_TARGET (GST_ELEMENT (basesink)) <= GST_STATE_READY) {
4805 GST_DEBUG_OBJECT (basesink, "element is <= READY");
4806 ret = GST_STATE_CHANGE_SUCCESS;
4808 GST_DEBUG_OBJECT (basesink,
4809 "PLAYING to PAUSED, we are not prerolled");
4810 basesink->playing_async = TRUE;
4811 priv->commited = FALSE;
4812 priv->call_preroll = TRUE;
4813 if (priv->async_enabled) {
4814 GST_DEBUG_OBJECT (basesink, "doing async state change");
4815 ret = GST_STATE_CHANGE_ASYNC;
4816 gst_element_post_message (GST_ELEMENT_CAST (basesink),
4817 gst_message_new_async_start (GST_OBJECT_CAST (basesink),
4822 GST_DEBUG_OBJECT (basesink, "rendered: %" G_GUINT64_FORMAT
4823 ", dropped: %" G_GUINT64_FORMAT, priv->rendered, priv->dropped);
4825 gst_base_sink_reset_qos (basesink);
4826 GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
4828 case GST_STATE_CHANGE_PAUSED_TO_READY:
4829 GST_PAD_PREROLL_LOCK (basesink->sinkpad);
4830 /* start by reseting our position state with the object lock so that the
4831 * position query gets the right idea. We do this before we post the
4832 * messages so that the message handlers pick this up. */
4833 GST_OBJECT_LOCK (basesink);
4834 basesink->have_newsegment = FALSE;
4835 priv->current_sstart = GST_CLOCK_TIME_NONE;
4836 priv->current_sstop = GST_CLOCK_TIME_NONE;
4837 priv->have_latency = FALSE;
4838 GST_OBJECT_UNLOCK (basesink);
4840 gst_base_sink_set_last_buffer (basesink, NULL);
4841 priv->call_preroll = FALSE;
4843 if (!priv->commited) {
4844 if (priv->async_enabled) {
4845 GST_DEBUG_OBJECT (basesink, "PAUSED to READY, posting async-done");
4847 gst_element_post_message (GST_ELEMENT_CAST (basesink),
4848 gst_message_new_state_changed (GST_OBJECT_CAST (basesink),
4849 GST_STATE_PLAYING, GST_STATE_PAUSED, GST_STATE_READY));
4851 gst_element_post_message (GST_ELEMENT_CAST (basesink),
4852 gst_message_new_async_done (GST_OBJECT_CAST (basesink)));
4854 priv->commited = TRUE;
4856 GST_DEBUG_OBJECT (basesink, "PAUSED to READY, don't need_preroll");
4858 GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
4860 case GST_STATE_CHANGE_READY_TO_NULL:
4862 if (!bclass->stop (basesink)) {
4863 GST_WARNING_OBJECT (basesink, "failed to stop");
4866 gst_base_sink_set_last_buffer (basesink, NULL);
4867 priv->call_preroll = FALSE;
4878 GST_DEBUG_OBJECT (basesink, "failed to start");
4879 return GST_STATE_CHANGE_FAILURE;
4883 GST_DEBUG_OBJECT (basesink,
4884 "element failed to change states -- activation problem?");
4885 return GST_STATE_CHANGE_FAILURE;