2 * Copyright (C) 2007 David Schleef <ds@schleef.org>
3 * (C) 2008 Wim Taymans <wim.taymans@gmail.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
22 * @short_description: Easy way for applications to inject buffers into a
24 * @see_also: #GstBaseSrc, appsink
26 * The appsrc element can be used by applications to insert data into a
27 * GStreamer pipeline. Unlike most GStreamer elements, Appsrc provides
28 * external API functions.
30 * appsrc can be used by linking with the libgstapp library to access the
31 * methods directly or by using the appsrc action signals.
33 * Before operating appsrc, the caps property must be set to a fixed caps
34 * describing the format of the data that will be pushed with appsrc. An
35 * exception to this is when pushing buffers with unknown caps, in which case no
36 * caps should be set. This is typically true of file-like sources that push raw
39 * The main way of handing data to the appsrc element is by calling the
40 * gst_app_src_push_buffer() method or by emitting the push-buffer action signal.
41 * This will put the buffer onto a queue from which appsrc will read from in its
42 * streaming thread. It is important to note that data transport will not happen
43 * from the thread that performed the push-buffer call.
45 * The "max-bytes" property controls how much data can be queued in appsrc
46 * before appsrc considers the queue full. A filled internal queue will always
47 * signal the "enough-data" signal, which signals the application that it should
48 * stop pushing data into appsrc. The "block" property will cause appsrc to
49 * block the push-buffer method until free data becomes available again.
51 * When the internal queue is running out of data, the "need-data" signal is
52 * emitted, which signals the application that it should start pushing more data
55 * In addition to the "need-data" and "enough-data" signals, appsrc can emit the
56 * "seek-data" signal when the "stream-mode" property is set to "seekable" or
57 * "random-access". The signal argument will contain the new desired position in
58 * the stream expressed in the unit set with the "format" property. After
59 * receiving the seek-data signal, the application should push-buffers from the
62 * These signals allow the application to operate the appsrc in two different
65 * The push model, in which the application repeatedly calls the push-buffer method
66 * with a new buffer. Optionally, the queue size in the appsrc can be controlled
67 * with the enough-data and need-data signals by respectively stopping/starting
68 * the push-buffer calls. This is a typical mode of operation for the
69 * stream-type "stream" and "seekable". Use this model when implementing various
70 * network protocols or hardware devices.
72 * The pull model where the need-data signal triggers the next push-buffer call.
73 * This mode is typically used in the "random-access" stream-type. Use this
74 * model for file access or other randomly accessable sources. In this mode, a
75 * buffer of exactly the amount of bytes given by the need-data signal should be
78 * In all modes, the size property on appsrc should contain the total stream
79 * size in bytes. Setting this property is mandatory in the random-access mode.
80 * For the stream and seekable modes, setting this property is optional but
83 * When the application is finished pushing data into appsrc, it should call
84 * gst_app_src_end_of_stream() or emit the end-of-stream action signal. After
85 * this call, no more buffers can be pushed into appsrc until a flushing seek
86 * happened or the state of the appsrc has gone through READY.
88 * Last reviewed on 2008-12-17 (0.10.10)
96 #include <gst/base/gstbasesrc.h>
100 #include "gstapp-marshal.h"
101 #include "gstappsrc.h"
103 struct _GstAppSrcPrivate
111 GstAppStreamType stream_type;
121 guint64 queued_bytes;
123 GstAppStreamType current_type;
127 gboolean emit_signals;
130 GstAppSrcCallbacks callbacks;
132 GDestroyNotify notify;
135 GST_DEBUG_CATEGORY_STATIC (app_src_debug);
136 #define GST_CAT_DEFAULT app_src_debug
147 SIGNAL_END_OF_STREAM,
152 #define DEFAULT_PROP_SIZE -1
153 #define DEFAULT_PROP_STREAM_TYPE GST_APP_STREAM_TYPE_STREAM
154 #define DEFAULT_PROP_MAX_BYTES 200000
155 #define DEFAULT_PROP_FORMAT GST_FORMAT_BYTES
156 #define DEFAULT_PROP_BLOCK FALSE
157 #define DEFAULT_PROP_IS_LIVE FALSE
158 #define DEFAULT_PROP_MIN_LATENCY -1
159 #define DEFAULT_PROP_MAX_LATENCY -1
160 #define DEFAULT_PROP_EMIT_SIGNALS TRUE
161 #define DEFAULT_PROP_MIN_PERCENT 0
180 static GstStaticPadTemplate gst_app_src_template =
181 GST_STATIC_PAD_TEMPLATE ("src",
184 GST_STATIC_CAPS_ANY);
187 gst_app_stream_type_get_type (void)
189 static volatile gsize stream_type_type = 0;
190 static const GEnumValue stream_type[] = {
191 {GST_APP_STREAM_TYPE_STREAM, "GST_APP_STREAM_TYPE_STREAM", "stream"},
192 {GST_APP_STREAM_TYPE_SEEKABLE, "GST_APP_STREAM_TYPE_SEEKABLE", "seekable"},
193 {GST_APP_STREAM_TYPE_RANDOM_ACCESS, "GST_APP_STREAM_TYPE_RANDOM_ACCESS",
198 if (g_once_init_enter (&stream_type_type)) {
199 GType tmp = g_enum_register_static ("GstAppStreamType", stream_type);
200 g_once_init_leave (&stream_type_type, tmp);
203 return (GType) stream_type_type;
206 static void gst_app_src_uri_handler_init (gpointer g_iface,
207 gpointer iface_data);
209 static void gst_app_src_dispose (GObject * object);
210 static void gst_app_src_finalize (GObject * object);
212 static void gst_app_src_set_property (GObject * object, guint prop_id,
213 const GValue * value, GParamSpec * pspec);
214 static void gst_app_src_get_property (GObject * object, guint prop_id,
215 GValue * value, GParamSpec * pspec);
217 static void gst_app_src_set_latencies (GstAppSrc * appsrc,
218 gboolean do_min, guint64 min, gboolean do_max, guint64 max);
220 static gboolean gst_app_src_negotiate (GstBaseSrc * basesrc);
221 static GstCaps *gst_app_src_internal_get_caps (GstBaseSrc * bsrc,
223 static GstFlowReturn gst_app_src_create (GstBaseSrc * bsrc, guint64 offset,
224 guint size, GstBuffer ** buf);
225 static gboolean gst_app_src_start (GstBaseSrc * bsrc);
226 static gboolean gst_app_src_stop (GstBaseSrc * bsrc);
227 static gboolean gst_app_src_unlock (GstBaseSrc * bsrc);
228 static gboolean gst_app_src_unlock_stop (GstBaseSrc * bsrc);
229 static gboolean gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment);
230 static gboolean gst_app_src_is_seekable (GstBaseSrc * src);
231 static gboolean gst_app_src_do_get_size (GstBaseSrc * src, guint64 * size);
232 static gboolean gst_app_src_query (GstBaseSrc * src, GstQuery * query);
234 static GstFlowReturn gst_app_src_push_buffer_action (GstAppSrc * appsrc,
237 static guint gst_app_src_signals[LAST_SIGNAL] = { 0 };
239 #define gst_app_src_parent_class parent_class
240 G_DEFINE_TYPE_WITH_CODE (GstAppSrc, gst_app_src, GST_TYPE_BASE_SRC,
241 G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_app_src_uri_handler_init));
244 gst_app_src_class_init (GstAppSrcClass * klass)
246 GObjectClass *gobject_class = (GObjectClass *) klass;
247 GstElementClass *element_class = (GstElementClass *) klass;
248 GstBaseSrcClass *basesrc_class = (GstBaseSrcClass *) klass;
250 GST_DEBUG_CATEGORY_INIT (app_src_debug, "appsrc", 0, "appsrc element");
252 gobject_class->dispose = gst_app_src_dispose;
253 gobject_class->finalize = gst_app_src_finalize;
255 gobject_class->set_property = gst_app_src_set_property;
256 gobject_class->get_property = gst_app_src_get_property;
261 * The GstCaps that will negotiated downstream and will be put
262 * on outgoing buffers.
264 g_object_class_install_property (gobject_class, PROP_CAPS,
265 g_param_spec_boxed ("caps", "Caps",
266 "The allowed caps for the src pad", GST_TYPE_CAPS,
267 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
271 * The format to use for segment events. When the source is producing
272 * timestamped buffers this property should be set to GST_FORMAT_TIME.
274 g_object_class_install_property (gobject_class, PROP_FORMAT,
275 g_param_spec_enum ("format", "Format",
276 "The format of the segment events and seek", GST_TYPE_FORMAT,
277 DEFAULT_PROP_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
281 * The total size in bytes of the data stream. If the total size is known, it
282 * is recommended to configure it with this property.
284 g_object_class_install_property (gobject_class, PROP_SIZE,
285 g_param_spec_int64 ("size", "Size",
286 "The size of the data stream in bytes (-1 if unknown)",
287 -1, G_MAXINT64, DEFAULT_PROP_SIZE,
288 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
290 * GstAppSrc::stream-type:
292 * The type of stream that this source is producing. For seekable streams the
293 * application should connect to the seek-data signal.
295 g_object_class_install_property (gobject_class, PROP_STREAM_TYPE,
296 g_param_spec_enum ("stream-type", "Stream Type",
297 "the type of the stream", GST_TYPE_APP_STREAM_TYPE,
298 DEFAULT_PROP_STREAM_TYPE,
299 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
301 * GstAppSrc::max-bytes:
303 * The maximum amount of bytes that can be queued internally.
304 * After the maximum amount of bytes are queued, appsrc will emit the
305 * "enough-data" signal.
307 g_object_class_install_property (gobject_class, PROP_MAX_BYTES,
308 g_param_spec_uint64 ("max-bytes", "Max bytes",
309 "The maximum number of bytes to queue internally (0 = unlimited)",
310 0, G_MAXUINT64, DEFAULT_PROP_MAX_BYTES,
311 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
315 * When max-bytes are queued and after the enough-data signal has been emitted,
316 * block any further push-buffer calls until the amount of queued bytes drops
317 * below the max-bytes limit.
319 g_object_class_install_property (gobject_class, PROP_BLOCK,
320 g_param_spec_boolean ("block", "Block",
321 "Block push-buffer when max-bytes are queued",
322 DEFAULT_PROP_BLOCK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
325 * GstAppSrc::is-live:
327 * Instruct the source to behave like a live source. This includes that it
328 * will only push out buffers in the PLAYING state.
330 g_object_class_install_property (gobject_class, PROP_IS_LIVE,
331 g_param_spec_boolean ("is-live", "Is Live",
332 "Whether to act as a live source",
333 DEFAULT_PROP_IS_LIVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
335 * GstAppSrc::min-latency:
337 * The minimum latency of the source. A value of -1 will use the default
338 * latency calculations of #GstBaseSrc.
340 g_object_class_install_property (gobject_class, PROP_MIN_LATENCY,
341 g_param_spec_int64 ("min-latency", "Min Latency",
342 "The minimum latency (-1 = default)",
343 -1, G_MAXINT64, DEFAULT_PROP_MIN_LATENCY,
344 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
346 * GstAppSrc::max-latency:
348 * The maximum latency of the source. A value of -1 means an unlimited amout
351 g_object_class_install_property (gobject_class, PROP_MAX_LATENCY,
352 g_param_spec_int64 ("max-latency", "Max Latency",
353 "The maximum latency (-1 = unlimited)",
354 -1, G_MAXINT64, DEFAULT_PROP_MAX_LATENCY,
355 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
358 * GstAppSrc::emit-signals:
360 * Make appsrc emit the "need-data", "enough-data" and "seek-data" signals.
361 * This option is by default enabled for backwards compatibility reasons but
362 * can disabled when needed because signal emission is expensive.
364 g_object_class_install_property (gobject_class, PROP_EMIT_SIGNALS,
365 g_param_spec_boolean ("emit-signals", "Emit signals",
366 "Emit need-data, enough-data and seek-data signals",
367 DEFAULT_PROP_EMIT_SIGNALS,
368 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
371 * GstAppSrc::empty-percent:
373 * Make appsrc emit the "need-data" signal when the amount of bytes in the
374 * queue drops below this percentage of max-bytes.
376 g_object_class_install_property (gobject_class, PROP_MIN_PERCENT,
377 g_param_spec_uint ("min-percent", "Min Percent",
378 "Emit need-data when queued bytes drops below this percent of max-bytes",
379 0, 100, DEFAULT_PROP_MIN_PERCENT,
380 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
383 * GstAppSrc::need-data:
384 * @appsrc: the appsrc element that emitted the signal
385 * @length: the amount of bytes needed.
387 * Signal that the source needs more data. In the callback or from another
388 * thread you should call push-buffer or end-of-stream.
390 * @length is just a hint and when it is set to -1, any number of bytes can be
391 * pushed into @appsrc.
393 * You can call push-buffer multiple times until the enough-data signal is
396 gst_app_src_signals[SIGNAL_NEED_DATA] =
397 g_signal_new ("need-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
398 G_STRUCT_OFFSET (GstAppSrcClass, need_data),
399 NULL, NULL, __gst_app_marshal_VOID__UINT, G_TYPE_NONE, 1, G_TYPE_UINT);
402 * GstAppSrc::enough-data:
403 * @appsrc: the appsrc element that emitted the signal
405 * Signal that the source has enough data. It is recommended that the
406 * application stops calling push-buffer until the need-data signal is
407 * emitted again to avoid excessive buffer queueing.
409 gst_app_src_signals[SIGNAL_ENOUGH_DATA] =
410 g_signal_new ("enough-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
411 G_STRUCT_OFFSET (GstAppSrcClass, enough_data),
412 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
415 * GstAppSrc::seek-data:
416 * @appsrc: the appsrc element that emitted the signal
417 * @offset: the offset to seek to
419 * Seek to the given offset. The next push-buffer should produce buffers from
421 * This callback is only called for seekable stream types.
423 * Returns: %TRUE if the seek succeeded.
425 gst_app_src_signals[SIGNAL_SEEK_DATA] =
426 g_signal_new ("seek-data", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
427 G_STRUCT_OFFSET (GstAppSrcClass, seek_data),
428 NULL, NULL, __gst_app_marshal_BOOLEAN__UINT64, G_TYPE_BOOLEAN, 1,
432 * GstAppSrc::push-buffer:
433 * @appsrc: the appsrc
434 * @buffer: a buffer to push
436 * Adds a buffer to the queue of buffers that the appsrc element will
437 * push to its source pad. This function does not take ownership of the
438 * buffer so the buffer needs to be unreffed after calling this function.
440 * When the block property is TRUE, this function can block until free space
441 * becomes available in the queue.
443 gst_app_src_signals[SIGNAL_PUSH_BUFFER] =
444 g_signal_new ("push-buffer", G_TYPE_FROM_CLASS (klass),
445 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstAppSrcClass,
446 push_buffer), NULL, NULL, __gst_app_marshal_ENUM__BOXED,
447 GST_TYPE_FLOW_RETURN, 1, GST_TYPE_BUFFER);
450 * GstAppSrc::end-of-stream:
451 * @appsrc: the appsrc
453 * Notify @appsrc that no more buffer are available.
455 gst_app_src_signals[SIGNAL_END_OF_STREAM] =
456 g_signal_new ("end-of-stream", G_TYPE_FROM_CLASS (klass),
457 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstAppSrcClass,
458 end_of_stream), NULL, NULL, __gst_app_marshal_ENUM__VOID,
459 GST_TYPE_FLOW_RETURN, 0, G_TYPE_NONE);
461 gst_element_class_set_static_metadata (element_class, "AppSrc",
462 "Generic/Source", "Allow the application to feed buffers to a pipeline",
463 "David Schleef <ds@schleef.org>, Wim Taymans <wim.taymans@gmail.com>");
465 gst_element_class_add_pad_template (element_class,
466 gst_static_pad_template_get (&gst_app_src_template));
468 basesrc_class->negotiate = gst_app_src_negotiate;
469 basesrc_class->get_caps = gst_app_src_internal_get_caps;
470 basesrc_class->create = gst_app_src_create;
471 basesrc_class->start = gst_app_src_start;
472 basesrc_class->stop = gst_app_src_stop;
473 basesrc_class->unlock = gst_app_src_unlock;
474 basesrc_class->unlock_stop = gst_app_src_unlock_stop;
475 basesrc_class->do_seek = gst_app_src_do_seek;
476 basesrc_class->is_seekable = gst_app_src_is_seekable;
477 basesrc_class->get_size = gst_app_src_do_get_size;
478 basesrc_class->get_size = gst_app_src_do_get_size;
479 basesrc_class->query = gst_app_src_query;
481 klass->push_buffer = gst_app_src_push_buffer_action;
482 klass->end_of_stream = gst_app_src_end_of_stream;
484 g_type_class_add_private (klass, sizeof (GstAppSrcPrivate));
488 gst_app_src_init (GstAppSrc * appsrc)
490 GstAppSrcPrivate *priv;
492 priv = appsrc->priv = G_TYPE_INSTANCE_GET_PRIVATE (appsrc, GST_TYPE_APP_SRC,
495 g_mutex_init (&priv->mutex);
496 g_cond_init (&priv->cond);
497 priv->queue = g_queue_new ();
499 priv->size = DEFAULT_PROP_SIZE;
500 priv->stream_type = DEFAULT_PROP_STREAM_TYPE;
501 priv->max_bytes = DEFAULT_PROP_MAX_BYTES;
502 priv->format = DEFAULT_PROP_FORMAT;
503 priv->block = DEFAULT_PROP_BLOCK;
504 priv->min_latency = DEFAULT_PROP_MIN_LATENCY;
505 priv->max_latency = DEFAULT_PROP_MAX_LATENCY;
506 priv->emit_signals = DEFAULT_PROP_EMIT_SIGNALS;
507 priv->min_percent = DEFAULT_PROP_MIN_PERCENT;
509 gst_base_src_set_live (GST_BASE_SRC (appsrc), DEFAULT_PROP_IS_LIVE);
513 gst_app_src_flush_queued (GstAppSrc * src)
516 GstAppSrcPrivate *priv = src->priv;
518 while ((buf = g_queue_pop_head (priv->queue)))
519 gst_buffer_unref (buf);
520 priv->queued_bytes = 0;
524 gst_app_src_dispose (GObject * obj)
526 GstAppSrc *appsrc = GST_APP_SRC_CAST (obj);
527 GstAppSrcPrivate *priv = appsrc->priv;
530 gst_caps_unref (priv->caps);
533 gst_app_src_flush_queued (appsrc);
535 G_OBJECT_CLASS (parent_class)->dispose (obj);
539 gst_app_src_finalize (GObject * obj)
541 GstAppSrc *appsrc = GST_APP_SRC_CAST (obj);
542 GstAppSrcPrivate *priv = appsrc->priv;
544 g_mutex_clear (&priv->mutex);
545 g_cond_clear (&priv->cond);
546 g_queue_free (priv->queue);
550 G_OBJECT_CLASS (parent_class)->finalize (obj);
554 gst_app_src_internal_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
556 GstAppSrc *appsrc = GST_APP_SRC (bsrc);
559 GST_OBJECT_LOCK (appsrc);
560 if ((caps = appsrc->priv->caps))
562 GST_OBJECT_UNLOCK (appsrc);
566 GstCaps *intersection =
567 gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
568 gst_caps_unref (caps);
571 caps = gst_caps_ref (filter);
575 GST_DEBUG_OBJECT (appsrc, "caps: %" GST_PTR_FORMAT, caps);
580 gst_app_src_set_property (GObject * object, guint prop_id,
581 const GValue * value, GParamSpec * pspec)
583 GstAppSrc *appsrc = GST_APP_SRC_CAST (object);
584 GstAppSrcPrivate *priv = appsrc->priv;
588 gst_app_src_set_caps (appsrc, gst_value_get_caps (value));
591 gst_app_src_set_size (appsrc, g_value_get_int64 (value));
593 case PROP_STREAM_TYPE:
594 gst_app_src_set_stream_type (appsrc, g_value_get_enum (value));
597 gst_app_src_set_max_bytes (appsrc, g_value_get_uint64 (value));
600 priv->format = g_value_get_enum (value);
603 priv->block = g_value_get_boolean (value);
606 gst_base_src_set_live (GST_BASE_SRC (appsrc),
607 g_value_get_boolean (value));
609 case PROP_MIN_LATENCY:
610 gst_app_src_set_latencies (appsrc, TRUE, g_value_get_int64 (value),
613 case PROP_MAX_LATENCY:
614 gst_app_src_set_latencies (appsrc, FALSE, -1, TRUE,
615 g_value_get_int64 (value));
617 case PROP_EMIT_SIGNALS:
618 gst_app_src_set_emit_signals (appsrc, g_value_get_boolean (value));
620 case PROP_MIN_PERCENT:
621 priv->min_percent = g_value_get_uint (value);
624 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
630 gst_app_src_get_property (GObject * object, guint prop_id, GValue * value,
633 GstAppSrc *appsrc = GST_APP_SRC_CAST (object);
634 GstAppSrcPrivate *priv = appsrc->priv;
638 g_value_take_boxed (value, gst_app_src_get_caps (appsrc));
641 g_value_set_int64 (value, gst_app_src_get_size (appsrc));
643 case PROP_STREAM_TYPE:
644 g_value_set_enum (value, gst_app_src_get_stream_type (appsrc));
647 g_value_set_uint64 (value, gst_app_src_get_max_bytes (appsrc));
650 g_value_set_enum (value, priv->format);
653 g_value_set_boolean (value, priv->block);
656 g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (appsrc)));
658 case PROP_MIN_LATENCY:
662 gst_app_src_get_latency (appsrc, &min, NULL);
663 g_value_set_int64 (value, min);
666 case PROP_MAX_LATENCY:
670 gst_app_src_get_latency (appsrc, NULL, &max);
671 g_value_set_int64 (value, max);
674 case PROP_EMIT_SIGNALS:
675 g_value_set_boolean (value, gst_app_src_get_emit_signals (appsrc));
677 case PROP_MIN_PERCENT:
678 g_value_set_uint (value, priv->min_percent);
681 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
687 gst_app_src_unlock (GstBaseSrc * bsrc)
689 GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
690 GstAppSrcPrivate *priv = appsrc->priv;
692 g_mutex_lock (&priv->mutex);
693 GST_DEBUG_OBJECT (appsrc, "unlock start");
694 priv->flushing = TRUE;
695 g_cond_broadcast (&priv->cond);
696 g_mutex_unlock (&priv->mutex);
702 gst_app_src_unlock_stop (GstBaseSrc * bsrc)
704 GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
705 GstAppSrcPrivate *priv = appsrc->priv;
707 g_mutex_lock (&priv->mutex);
708 GST_DEBUG_OBJECT (appsrc, "unlock stop");
709 priv->flushing = FALSE;
710 g_cond_broadcast (&priv->cond);
711 g_mutex_unlock (&priv->mutex);
717 gst_app_src_start (GstBaseSrc * bsrc)
719 GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
720 GstAppSrcPrivate *priv = appsrc->priv;
722 g_mutex_lock (&priv->mutex);
723 GST_DEBUG_OBJECT (appsrc, "starting");
724 priv->new_caps = FALSE;
725 priv->started = TRUE;
726 /* set the offset to -1 so that we always do a first seek. This is only used
727 * in random-access mode. */
729 priv->flushing = FALSE;
730 g_mutex_unlock (&priv->mutex);
732 gst_base_src_set_format (bsrc, priv->format);
738 gst_app_src_stop (GstBaseSrc * bsrc)
740 GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
741 GstAppSrcPrivate *priv = appsrc->priv;
743 g_mutex_lock (&priv->mutex);
744 GST_DEBUG_OBJECT (appsrc, "stopping");
745 priv->is_eos = FALSE;
746 priv->flushing = TRUE;
747 priv->started = FALSE;
748 gst_app_src_flush_queued (appsrc);
749 g_cond_broadcast (&priv->cond);
750 g_mutex_unlock (&priv->mutex);
756 gst_app_src_is_seekable (GstBaseSrc * src)
758 GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
759 GstAppSrcPrivate *priv = appsrc->priv;
760 gboolean res = FALSE;
762 switch (priv->stream_type) {
763 case GST_APP_STREAM_TYPE_STREAM:
765 case GST_APP_STREAM_TYPE_SEEKABLE:
766 case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
774 gst_app_src_do_get_size (GstBaseSrc * src, guint64 * size)
776 GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
778 *size = gst_app_src_get_size (appsrc);
784 gst_app_src_query (GstBaseSrc * src, GstQuery * query)
786 GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
787 GstAppSrcPrivate *priv = appsrc->priv;
790 switch (GST_QUERY_TYPE (query)) {
791 case GST_QUERY_LATENCY:
793 GstClockTime min, max;
796 /* Query the parent class for the defaults */
797 res = gst_base_src_query_latency (src, &live, &min, &max);
799 /* overwrite with our values when we need to */
800 g_mutex_lock (&priv->mutex);
801 if (priv->min_latency != -1)
802 min = priv->min_latency;
803 if (priv->max_latency != -1)
804 max = priv->max_latency;
805 g_mutex_unlock (&priv->mutex);
807 gst_query_set_latency (query, live, min, max);
810 case GST_QUERY_SCHEDULING:
812 gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0);
813 gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
815 switch (priv->stream_type) {
816 case GST_APP_STREAM_TYPE_STREAM:
817 case GST_APP_STREAM_TYPE_SEEKABLE:
819 case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
820 gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL);
827 res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
834 /* will be called in push mode */
836 gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment)
838 GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
839 GstAppSrcPrivate *priv = appsrc->priv;
840 gint64 desired_position;
841 gboolean res = FALSE;
843 desired_position = segment->position;
845 GST_DEBUG_OBJECT (appsrc, "seeking to %" G_GINT64_FORMAT ", format %s",
846 desired_position, gst_format_get_name (segment->format));
848 /* no need to try to seek in streaming mode */
849 if (priv->stream_type == GST_APP_STREAM_TYPE_STREAM)
852 if (priv->callbacks.seek_data)
853 res = priv->callbacks.seek_data (appsrc, desired_position, priv->user_data);
857 g_mutex_lock (&priv->mutex);
858 emit = priv->emit_signals;
859 g_mutex_unlock (&priv->mutex);
862 g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
863 desired_position, &res);
867 GST_DEBUG_OBJECT (appsrc, "flushing queue");
868 gst_app_src_flush_queued (appsrc);
869 priv->is_eos = FALSE;
871 GST_WARNING_OBJECT (appsrc, "seek failed");
877 /* must be called with the appsrc mutex */
879 gst_app_src_emit_seek (GstAppSrc * appsrc, guint64 offset)
881 gboolean res = FALSE;
883 GstAppSrcPrivate *priv = appsrc->priv;
885 emit = priv->emit_signals;
886 g_mutex_unlock (&priv->mutex);
888 GST_DEBUG_OBJECT (appsrc,
889 "we are at %" G_GINT64_FORMAT ", seek to %" G_GINT64_FORMAT,
890 priv->offset, offset);
892 if (priv->callbacks.seek_data)
893 res = priv->callbacks.seek_data (appsrc, offset, priv->user_data);
895 g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
898 g_mutex_lock (&priv->mutex);
903 /* must be called with the appsrc mutex. After this call things can be
906 gst_app_src_emit_need_data (GstAppSrc * appsrc, guint size)
909 GstAppSrcPrivate *priv = appsrc->priv;
911 emit = priv->emit_signals;
912 g_mutex_unlock (&priv->mutex);
914 /* we have no data, we need some. We fire the signal with the size hint. */
915 if (priv->callbacks.need_data)
916 priv->callbacks.need_data (appsrc, size, priv->user_data);
918 g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_NEED_DATA], 0, size,
921 g_mutex_lock (&priv->mutex);
922 /* we can be flushing now because we released the lock */
926 gst_app_src_do_negotiate (GstBaseSrc * basesrc)
928 GstAppSrc *appsrc = GST_APP_SRC_CAST (basesrc);
929 GstAppSrcPrivate *priv = appsrc->priv;
933 GST_OBJECT_LOCK (basesrc);
934 caps = priv->caps ? gst_caps_ref (priv->caps) : NULL;
935 GST_OBJECT_UNLOCK (basesrc);
938 result = gst_base_src_set_caps (basesrc, caps);
939 gst_caps_unref (caps);
941 result = GST_BASE_SRC_CLASS (parent_class)->negotiate (basesrc);
948 gst_app_src_negotiate (GstBaseSrc * basesrc)
950 GstAppSrc *appsrc = GST_APP_SRC_CAST (basesrc);
951 GstAppSrcPrivate *priv = appsrc->priv;
954 g_mutex_lock (&priv->mutex);
955 result = gst_app_src_do_negotiate (basesrc);
956 priv->new_caps = FALSE;
957 g_mutex_unlock (&priv->mutex);
962 gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
965 GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
966 GstAppSrcPrivate *priv = appsrc->priv;
969 GST_OBJECT_LOCK (appsrc);
970 if (G_UNLIKELY (priv->size != bsrc->segment.duration &&
971 bsrc->segment.format == GST_FORMAT_BYTES)) {
972 GST_DEBUG_OBJECT (appsrc,
973 "Size changed from %" G_GINT64_FORMAT " to %" G_GINT64_FORMAT,
974 bsrc->segment.duration, priv->size);
975 bsrc->segment.duration = priv->size;
976 GST_OBJECT_UNLOCK (appsrc);
978 gst_element_post_message (GST_ELEMENT (appsrc),
979 gst_message_new_duration_changed (GST_OBJECT (appsrc)));
981 GST_OBJECT_UNLOCK (appsrc);
984 g_mutex_lock (&priv->mutex);
985 /* check flushing first */
986 if (G_UNLIKELY (priv->flushing))
989 if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS) {
990 /* if we are dealing with a random-access stream, issue a seek if the offset
992 if (G_UNLIKELY (priv->offset != offset)) {
996 res = gst_app_src_emit_seek (appsrc, offset);
998 if (G_UNLIKELY (!res))
999 /* failing to seek is fatal */
1002 priv->offset = offset;
1003 priv->is_eos = FALSE;
1008 /* return data as long as we have some */
1009 if (!g_queue_is_empty (priv->queue)) {
1012 if (priv->new_caps) {
1013 gst_app_src_do_negotiate (bsrc);
1014 priv->new_caps = FALSE;
1017 *buf = g_queue_pop_head (priv->queue);
1018 buf_size = gst_buffer_get_size (*buf);
1020 GST_DEBUG_OBJECT (appsrc, "we have buffer %p of size %u", *buf, buf_size);
1022 priv->queued_bytes -= buf_size;
1024 /* only update the offset when in random_access mode */
1025 if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS)
1026 priv->offset += buf_size;
1028 /* signal that we removed an item */
1029 g_cond_broadcast (&priv->cond);
1031 /* see if we go lower than the empty-percent */
1032 if (priv->min_percent && priv->max_bytes) {
1033 if (priv->queued_bytes * 100 / priv->max_bytes <= priv->min_percent)
1034 /* ignore flushing state, we got a buffer and we will return it now.
1035 * Errors will be handled in the next round */
1036 gst_app_src_emit_need_data (appsrc, size);
1041 gst_app_src_emit_need_data (appsrc, size);
1043 /* we can be flushing now because we released the lock above */
1044 if (G_UNLIKELY (priv->flushing))
1047 /* if we have a buffer now, continue the loop and try to return it. In
1048 * random-access mode (where a buffer is normally pushed in the above
1049 * signal) we can still be empty because the pushed buffer got flushed or
1050 * when the application pushes the requested buffer later, we support both
1052 if (!g_queue_is_empty (priv->queue))
1055 /* no buffer yet, maybe we are EOS, if not, block for more data. */
1059 if (G_UNLIKELY (priv->is_eos))
1062 /* nothing to return, wait a while for new data or flushing. */
1063 g_cond_wait (&priv->cond, &priv->mutex);
1065 g_mutex_unlock (&priv->mutex);
1071 GST_DEBUG_OBJECT (appsrc, "we are flushing");
1072 g_mutex_unlock (&priv->mutex);
1073 return GST_FLOW_FLUSHING;
1077 GST_DEBUG_OBJECT (appsrc, "we are EOS");
1078 g_mutex_unlock (&priv->mutex);
1079 return GST_FLOW_EOS;
1083 g_mutex_unlock (&priv->mutex);
1084 GST_ELEMENT_ERROR (appsrc, RESOURCE, READ, ("failed to seek"),
1086 return GST_FLOW_ERROR;
1093 * gst_app_src_set_caps:
1094 * @appsrc: a #GstAppSrc
1095 * @caps: caps to set
1097 * Set the capabilities on the appsrc element. This function takes
1098 * a copy of the caps structure. After calling this method, the source will
1099 * only produce caps that match @caps. @caps must be fixed and the caps on the
1100 * buffers must match the caps or left NULL.
1103 gst_app_src_set_caps (GstAppSrc * appsrc, const GstCaps * caps)
1106 GstAppSrcPrivate *priv;
1108 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1110 priv = appsrc->priv;
1112 g_mutex_lock (&priv->mutex);
1114 GST_OBJECT_LOCK (appsrc);
1115 GST_DEBUG_OBJECT (appsrc, "setting caps to %" GST_PTR_FORMAT, caps);
1116 if ((old = priv->caps) != caps) {
1118 priv->caps = gst_caps_copy (caps);
1122 gst_caps_unref (old);
1123 priv->new_caps = TRUE;
1125 GST_OBJECT_UNLOCK (appsrc);
1127 g_mutex_unlock (&priv->mutex);
1131 * gst_app_src_get_caps:
1132 * @appsrc: a #GstAppSrc
1134 * Get the configured caps on @appsrc.
1136 * Returns: the #GstCaps produced by the source. gst_caps_unref() after usage.
1139 gst_app_src_get_caps (GstAppSrc * appsrc)
1141 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), NULL);
1143 return gst_app_src_internal_get_caps (GST_BASE_SRC_CAST (appsrc), NULL);
1147 * gst_app_src_set_size:
1148 * @appsrc: a #GstAppSrc
1149 * @size: the size to set
1151 * Set the size of the stream in bytes. A value of -1 means that the size is
1155 gst_app_src_set_size (GstAppSrc * appsrc, gint64 size)
1157 GstAppSrcPrivate *priv;
1159 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1161 priv = appsrc->priv;
1163 GST_OBJECT_LOCK (appsrc);
1164 GST_DEBUG_OBJECT (appsrc, "setting size of %" G_GINT64_FORMAT, size);
1166 GST_OBJECT_UNLOCK (appsrc);
1170 * gst_app_src_get_size:
1171 * @appsrc: a #GstAppSrc
1173 * Get the size of the stream in bytes. A value of -1 means that the size is
1176 * Returns: the size of the stream previously set with gst_app_src_set_size();
1179 gst_app_src_get_size (GstAppSrc * appsrc)
1182 GstAppSrcPrivate *priv;
1184 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), -1);
1186 priv = appsrc->priv;
1188 GST_OBJECT_LOCK (appsrc);
1190 GST_DEBUG_OBJECT (appsrc, "getting size of %" G_GINT64_FORMAT, size);
1191 GST_OBJECT_UNLOCK (appsrc);
1197 * gst_app_src_set_stream_type:
1198 * @appsrc: a #GstAppSrc
1199 * @type: the new state
1201 * Set the stream type on @appsrc. For seekable streams, the "seek" signal must
1204 * A stream_type stream
1207 gst_app_src_set_stream_type (GstAppSrc * appsrc, GstAppStreamType type)
1209 GstAppSrcPrivate *priv;
1211 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1213 priv = appsrc->priv;
1215 GST_OBJECT_LOCK (appsrc);
1216 GST_DEBUG_OBJECT (appsrc, "setting stream_type of %d", type);
1217 priv->stream_type = type;
1218 GST_OBJECT_UNLOCK (appsrc);
1222 * gst_app_src_get_stream_type:
1223 * @appsrc: a #GstAppSrc
1225 * Get the stream type. Control the stream type of @appsrc
1226 * with gst_app_src_set_stream_type().
1228 * Returns: the stream type.
1231 gst_app_src_get_stream_type (GstAppSrc * appsrc)
1233 gboolean stream_type;
1234 GstAppSrcPrivate *priv;
1236 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), FALSE);
1238 priv = appsrc->priv;
1240 GST_OBJECT_LOCK (appsrc);
1241 stream_type = priv->stream_type;
1242 GST_DEBUG_OBJECT (appsrc, "getting stream_type of %d", stream_type);
1243 GST_OBJECT_UNLOCK (appsrc);
1249 * gst_app_src_set_max_bytes:
1250 * @appsrc: a #GstAppSrc
1251 * @max: the maximum number of bytes to queue
1253 * Set the maximum amount of bytes that can be queued in @appsrc.
1254 * After the maximum amount of bytes are queued, @appsrc will emit the
1255 * "enough-data" signal.
1258 gst_app_src_set_max_bytes (GstAppSrc * appsrc, guint64 max)
1260 GstAppSrcPrivate *priv;
1262 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1264 priv = appsrc->priv;
1266 g_mutex_lock (&priv->mutex);
1267 if (max != priv->max_bytes) {
1268 GST_DEBUG_OBJECT (appsrc, "setting max-bytes to %" G_GUINT64_FORMAT, max);
1269 priv->max_bytes = max;
1270 /* signal the change */
1271 g_cond_broadcast (&priv->cond);
1273 g_mutex_unlock (&priv->mutex);
1277 * gst_app_src_get_max_bytes:
1278 * @appsrc: a #GstAppSrc
1280 * Get the maximum amount of bytes that can be queued in @appsrc.
1282 * Returns: The maximum amount of bytes that can be queued.
1285 gst_app_src_get_max_bytes (GstAppSrc * appsrc)
1288 GstAppSrcPrivate *priv;
1290 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), 0);
1292 priv = appsrc->priv;
1294 g_mutex_lock (&priv->mutex);
1295 result = priv->max_bytes;
1296 GST_DEBUG_OBJECT (appsrc, "getting max-bytes of %" G_GUINT64_FORMAT, result);
1297 g_mutex_unlock (&priv->mutex);
1303 gst_app_src_set_latencies (GstAppSrc * appsrc, gboolean do_min, guint64 min,
1304 gboolean do_max, guint64 max)
1306 GstAppSrcPrivate *priv = appsrc->priv;
1307 gboolean changed = FALSE;
1309 g_mutex_lock (&priv->mutex);
1310 if (do_min && priv->min_latency != min) {
1311 priv->min_latency = min;
1314 if (do_max && priv->max_latency != max) {
1315 priv->max_latency = max;
1318 g_mutex_unlock (&priv->mutex);
1321 GST_DEBUG_OBJECT (appsrc, "posting latency changed");
1322 gst_element_post_message (GST_ELEMENT_CAST (appsrc),
1323 gst_message_new_latency (GST_OBJECT_CAST (appsrc)));
1328 * gst_app_src_set_latency:
1329 * @appsrc: a #GstAppSrc
1330 * @min: the min latency
1331 * @max: the min latency
1333 * Configure the @min and @max latency in @src. If @min is set to -1, the
1334 * default latency calculations for pseudo-live sources will be used.
1337 gst_app_src_set_latency (GstAppSrc * appsrc, guint64 min, guint64 max)
1339 gst_app_src_set_latencies (appsrc, TRUE, min, TRUE, max);
1343 * gst_app_src_get_latency:
1344 * @appsrc: a #GstAppSrc
1345 * @min: the min latency
1346 * @max: the min latency
1348 * Retrieve the min and max latencies in @min and @max respectively.
1351 gst_app_src_get_latency (GstAppSrc * appsrc, guint64 * min, guint64 * max)
1353 GstAppSrcPrivate *priv;
1355 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1357 priv = appsrc->priv;
1359 g_mutex_lock (&priv->mutex);
1361 *min = priv->min_latency;
1363 *max = priv->max_latency;
1364 g_mutex_unlock (&priv->mutex);
1368 * gst_app_src_set_emit_signals:
1369 * @appsrc: a #GstAppSrc
1370 * @emit: the new state
1372 * Make appsrc emit the "new-preroll" and "new-buffer" signals. This option is
1373 * by default disabled because signal emission is expensive and unneeded when
1374 * the application prefers to operate in pull mode.
1377 gst_app_src_set_emit_signals (GstAppSrc * appsrc, gboolean emit)
1379 GstAppSrcPrivate *priv;
1381 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1383 priv = appsrc->priv;
1385 g_mutex_lock (&priv->mutex);
1386 priv->emit_signals = emit;
1387 g_mutex_unlock (&priv->mutex);
1391 * gst_app_src_get_emit_signals:
1392 * @appsrc: a #GstAppSrc
1394 * Check if appsrc will emit the "new-preroll" and "new-buffer" signals.
1396 * Returns: %TRUE if @appsrc is emitting the "new-preroll" and "new-buffer"
1400 gst_app_src_get_emit_signals (GstAppSrc * appsrc)
1403 GstAppSrcPrivate *priv;
1405 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), FALSE);
1407 priv = appsrc->priv;
1409 g_mutex_lock (&priv->mutex);
1410 result = priv->emit_signals;
1411 g_mutex_unlock (&priv->mutex);
1416 static GstFlowReturn
1417 gst_app_src_push_buffer_full (GstAppSrc * appsrc, GstBuffer * buffer,
1420 gboolean first = TRUE;
1421 GstAppSrcPrivate *priv;
1423 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), GST_FLOW_ERROR);
1424 g_return_val_if_fail (GST_IS_BUFFER (buffer), GST_FLOW_ERROR);
1426 priv = appsrc->priv;
1428 g_mutex_lock (&priv->mutex);
1431 /* can't accept buffers when we are flushing or EOS */
1438 if (priv->max_bytes && priv->queued_bytes >= priv->max_bytes) {
1439 GST_DEBUG_OBJECT (appsrc,
1440 "queue filled (%" G_GUINT64_FORMAT " >= %" G_GUINT64_FORMAT ")",
1441 priv->queued_bytes, priv->max_bytes);
1446 emit = priv->emit_signals;
1447 /* only signal on the first push */
1448 g_mutex_unlock (&priv->mutex);
1450 if (priv->callbacks.enough_data)
1451 priv->callbacks.enough_data (appsrc, priv->user_data);
1453 g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_ENOUGH_DATA], 0,
1456 g_mutex_lock (&priv->mutex);
1457 /* continue to check for flushing/eos after releasing the lock */
1462 GST_DEBUG_OBJECT (appsrc, "waiting for free space");
1463 /* we are filled, wait until a buffer gets popped or when we
1465 g_cond_wait (&priv->cond, &priv->mutex);
1467 /* no need to wait for free space, we just pump more data into the
1468 * queue hoping that the caller reacts to the enough-data signal and
1469 * stops pushing buffers. */
1476 GST_DEBUG_OBJECT (appsrc, "queueing buffer %p", buffer);
1478 gst_buffer_ref (buffer);
1479 g_queue_push_tail (priv->queue, buffer);
1480 priv->queued_bytes += gst_buffer_get_size (buffer);
1481 g_cond_broadcast (&priv->cond);
1482 g_mutex_unlock (&priv->mutex);
1489 GST_DEBUG_OBJECT (appsrc, "refuse buffer %p, we are flushing", buffer);
1491 gst_buffer_unref (buffer);
1492 g_mutex_unlock (&priv->mutex);
1493 return GST_FLOW_FLUSHING;
1497 GST_DEBUG_OBJECT (appsrc, "refuse buffer %p, we are EOS", buffer);
1499 gst_buffer_unref (buffer);
1500 g_mutex_unlock (&priv->mutex);
1501 return GST_FLOW_EOS;
1506 * gst_app_src_push_buffer:
1507 * @appsrc: a #GstAppSrc
1508 * @buffer: (transfer full): a #GstBuffer to push
1510 * Adds a buffer to the queue of buffers that the appsrc element will
1511 * push to its source pad. This function takes ownership of the buffer.
1513 * When the block property is TRUE, this function can block until free
1514 * space becomes available in the queue.
1516 * Returns: #GST_FLOW_OK when the buffer was successfuly queued.
1517 * #GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
1518 * #GST_FLOW_EOS when EOS occured.
1521 gst_app_src_push_buffer (GstAppSrc * appsrc, GstBuffer * buffer)
1523 return gst_app_src_push_buffer_full (appsrc, buffer, TRUE);
1526 /* push a buffer without stealing the ref of the buffer. This is used for the
1528 static GstFlowReturn
1529 gst_app_src_push_buffer_action (GstAppSrc * appsrc, GstBuffer * buffer)
1531 return gst_app_src_push_buffer_full (appsrc, buffer, FALSE);
1535 * gst_app_src_end_of_stream:
1536 * @appsrc: a #GstAppSrc
1538 * Indicates to the appsrc element that the last buffer queued in the
1539 * element is the last buffer of the stream.
1541 * Returns: #GST_FLOW_OK when the EOS was successfuly queued.
1542 * #GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
1545 gst_app_src_end_of_stream (GstAppSrc * appsrc)
1547 GstAppSrcPrivate *priv;
1549 g_return_val_if_fail (GST_IS_APP_SRC (appsrc), GST_FLOW_ERROR);
1551 priv = appsrc->priv;
1553 g_mutex_lock (&priv->mutex);
1554 /* can't accept buffers when we are flushing. We can accept them when we are
1555 * EOS although it will not do anything. */
1559 GST_DEBUG_OBJECT (appsrc, "sending EOS");
1560 priv->is_eos = TRUE;
1561 g_cond_broadcast (&priv->cond);
1562 g_mutex_unlock (&priv->mutex);
1569 g_mutex_unlock (&priv->mutex);
1570 GST_DEBUG_OBJECT (appsrc, "refuse EOS, we are flushing");
1571 return GST_FLOW_FLUSHING;
1576 * gst_app_src_set_callbacks: (skip)
1577 * @appsrc: a #GstAppSrc
1578 * @callbacks: the callbacks
1579 * @user_data: a user_data argument for the callbacks
1580 * @notify: a destroy notify function
1582 * Set callbacks which will be executed when data is needed, enough data has
1583 * been collected or when a seek should be performed.
1584 * This is an alternative to using the signals, it has lower overhead and is thus
1585 * less expensive, but also less flexible.
1587 * If callbacks are installed, no signals will be emitted for performance
1591 gst_app_src_set_callbacks (GstAppSrc * appsrc,
1592 GstAppSrcCallbacks * callbacks, gpointer user_data, GDestroyNotify notify)
1594 GDestroyNotify old_notify;
1595 GstAppSrcPrivate *priv;
1597 g_return_if_fail (GST_IS_APP_SRC (appsrc));
1598 g_return_if_fail (callbacks != NULL);
1600 priv = appsrc->priv;
1602 GST_OBJECT_LOCK (appsrc);
1603 old_notify = priv->notify;
1608 old_data = priv->user_data;
1610 priv->user_data = NULL;
1611 priv->notify = NULL;
1612 GST_OBJECT_UNLOCK (appsrc);
1614 old_notify (old_data);
1616 GST_OBJECT_LOCK (appsrc);
1618 priv->callbacks = *callbacks;
1619 priv->user_data = user_data;
1620 priv->notify = notify;
1621 GST_OBJECT_UNLOCK (appsrc);
1624 /*** GSTURIHANDLER INTERFACE *************************************************/
1627 gst_app_src_uri_get_type (GType type)
1632 static const gchar *const *
1633 gst_app_src_uri_get_protocols (GType type)
1635 static const gchar *protocols[] = { "appsrc", NULL };
1641 gst_app_src_uri_get_uri (GstURIHandler * handler)
1643 GstAppSrc *appsrc = GST_APP_SRC (handler);
1645 return appsrc->priv->uri ? g_strdup (appsrc->priv->uri) : NULL;
1649 gst_app_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
1652 GstAppSrc *appsrc = GST_APP_SRC (handler);
1654 g_free (appsrc->priv->uri);
1655 appsrc->priv->uri = uri ? g_strdup (uri) : NULL;
1661 gst_app_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
1663 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
1665 iface->get_type = gst_app_src_uri_get_type;
1666 iface->get_protocols = gst_app_src_uri_get_protocols;
1667 iface->get_uri = gst_app_src_uri_get_uri;
1668 iface->set_uri = gst_app_src_uri_set_uri;