2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
23 #ifndef __GST_BASE_SINK_H__
24 #define __GST_BASE_SINK_H__
31 #define GST_TYPE_BASE_SINK (gst_base_sink_get_type())
32 #define GST_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_SINK,GstBaseSink))
33 #define GST_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_SINK,GstBaseSinkClass))
34 #define GST_BASE_SINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_SINK, GstBaseSinkClass))
35 #define GST_IS_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_SINK))
36 #define GST_IS_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_SINK))
37 #define GST_BASE_SINK_CAST(obj) ((GstBaseSink *) (obj))
41 * @obj: base sink instance
43 * Gives the pointer to the #GstPad object of the element.
45 #define GST_BASE_SINK_PAD(obj) (GST_BASE_SINK_CAST (obj)->sinkpad)
47 #define GST_BASE_SINK_GET_PREROLL_LOCK(obj) (&GST_BASE_SINK_CAST(obj)->preroll_lock)
48 #define GST_BASE_SINK_PREROLL_LOCK(obj) (g_mutex_lock(GST_BASE_SINK_GET_PREROLL_LOCK(obj)))
49 #define GST_BASE_SINK_PREROLL_TRYLOCK(obj) (g_mutex_trylock(GST_BASE_SINK_GET_PREROLL_LOCK(obj)))
50 #define GST_BASE_SINK_PREROLL_UNLOCK(obj) (g_mutex_unlock(GST_BASE_SINK_GET_PREROLL_LOCK(obj)))
52 #define GST_BASE_SINK_GET_PREROLL_COND(obj) (&GST_BASE_SINK_CAST(obj)->preroll_cond)
53 #define GST_BASE_SINK_PREROLL_WAIT(obj) \
54 g_cond_wait (GST_BASE_SINK_GET_PREROLL_COND (obj), GST_BASE_SINK_GET_PREROLL_LOCK (obj))
55 #define GST_BASE_SINK_PREROLL_WAIT_UNTIL(obj, end_time) \
56 g_cond_wait_until (GST_BASE_SINK_GET_PREROLL_COND (obj), GST_BASE_SINK_GET_PREROLL_LOCK (obj), end_time)
57 #define GST_BASE_SINK_PREROLL_SIGNAL(obj) g_cond_signal (GST_BASE_SINK_GET_PREROLL_COND (obj));
58 #define GST_BASE_SINK_PREROLL_BROADCAST(obj) g_cond_broadcast (GST_BASE_SINK_GET_PREROLL_COND (obj));
60 typedef struct _GstBaseSink GstBaseSink;
61 typedef struct _GstBaseSinkClass GstBaseSinkClass;
62 typedef struct _GstBaseSinkPrivate GstBaseSinkPrivate;
67 * The opaque #GstBaseSink data structure.
76 /*< protected >*/ /* with LOCK */
78 gboolean can_activate_pull;
79 gboolean can_activate_push;
81 /*< protected >*/ /* with PREROLL_LOCK */
85 gboolean need_preroll;
86 gboolean have_preroll;
87 gboolean playing_async;
89 /*< protected >*/ /* with STREAM_LOCK */
90 gboolean have_newsegment;
93 /*< private >*/ /* with LOCK */
102 GstBaseSinkPrivate *priv;
104 gpointer _gst_reserved[GST_PADDING_LARGE];
109 * @parent_class: Element parent class
110 * @get_caps: Called to get sink pad caps from the subclass
111 * @set_caps: Notify subclass of changed caps
112 * @fixate: Only useful in pull mode. Implement if you have
113 * ideas about what should be the default values for the caps you support.
114 * @activate_pull: Subclasses should override this when they can provide an
115 * alternate method of spawning a thread to drive the pipeline in pull mode.
116 * Should start or stop the pulling thread, depending on the value of the
117 * "active" argument. Called after actually activating the sink pad in pull
118 * mode. The default implementation starts a task on the sink pad.
119 * @get_times: Called to get the start and end times for synchronising
120 * the passed buffer to the clock
121 * @propose_allocation: configure the allocation query
122 * @start: Start processing. Ideal for opening resources in the subclass
123 * @stop: Stop processing. Subclasses should use this to close resources.
124 * @unlock: Unlock any pending access to the resource. Subclasses should
125 * unblock any blocked function ASAP and call gst_base_sink_wait_preroll()
126 * @unlock_stop: Clear the previous unlock request. Subclasses should clear
127 * any state they set during #GstBaseSinkClass.unlock(), and be ready to
128 * continue where they left off after gst_base_sink_wait_preroll(),
129 * gst_base_sink_wait() or gst_wait_sink_wait_clock() return or
130 * #GstBaseSinkClass.render() is called again.
131 * @query: perform a #GstQuery on the element.
132 * @event: Override this to handle events arriving on the sink pad
133 * @wait_event: Override this to implement custom logic to wait for the event
134 * time (for events like EOS and GAP). Subclasses should always first
135 * chain up to the default implementation.
136 * @prepare: Called to prepare the buffer for @render and @preroll. This
137 * function is called before synchronisation is performed.
138 * @prepare_list: Called to prepare the buffer list for @render_list. This
139 * function is called before synchronisation is performed.
140 * @preroll: Called to present the preroll buffer if desired.
141 * @render: Called when a buffer should be presented or output, at the
142 * correct moment if the #GstBaseSink has been set to sync to the clock.
143 * @render_list: Same as @render but used with buffer lists instead of
146 * Subclasses can override any of the available virtual methods or not, as
147 * needed. At the minimum, the @render method should be overridden to
148 * output/present buffers.
150 struct _GstBaseSinkClass {
151 GstElementClass parent_class;
153 /* get caps from subclass */
154 GstCaps* (*get_caps) (GstBaseSink *sink, GstCaps *filter);
155 /* notify subclass of new caps */
156 gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps);
158 /* fixate sink caps during pull-mode negotiation */
159 GstCaps * (*fixate) (GstBaseSink *sink, GstCaps *caps);
160 /* start or stop a pulling thread */
161 gboolean (*activate_pull)(GstBaseSink *sink, gboolean active);
163 /* get the start and end times for syncing on this buffer */
164 void (*get_times) (GstBaseSink *sink, GstBuffer *buffer,
165 GstClockTime *start, GstClockTime *end);
167 /* propose allocation parameters for upstream */
168 gboolean (*propose_allocation) (GstBaseSink *sink, GstQuery *query);
170 /* start and stop processing, ideal for opening/closing the resource */
171 gboolean (*start) (GstBaseSink *sink);
172 gboolean (*stop) (GstBaseSink *sink);
174 /* unlock any pending access to the resource. subclasses should unlock
175 * any function ASAP. */
176 gboolean (*unlock) (GstBaseSink *sink);
177 /* Clear a previously indicated unlock request not that unlocking is
178 * complete. Sub-classes should clear any command queue or indicator they
179 * set during unlock */
180 gboolean (*unlock_stop) (GstBaseSink *sink);
182 /* notify subclass of query */
183 gboolean (*query) (GstBaseSink *sink, GstQuery *query);
185 /* notify subclass of event */
186 gboolean (*event) (GstBaseSink *sink, GstEvent *event);
187 /* wait for eos or gap, subclasses should chain up to parent first */
188 GstFlowReturn (*wait_event) (GstBaseSink *sink, GstEvent *event);
190 /* notify subclass of buffer or list before doing sync */
191 GstFlowReturn (*prepare) (GstBaseSink *sink, GstBuffer *buffer);
192 GstFlowReturn (*prepare_list) (GstBaseSink *sink, GstBufferList *buffer_list);
194 /* notify subclass of preroll buffer or real buffer */
195 GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer);
196 GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer);
197 /* Render a BufferList */
198 GstFlowReturn (*render_list) (GstBaseSink *sink, GstBufferList *buffer_list);
201 gpointer _gst_reserved[GST_PADDING_LARGE];
205 GType gst_base_sink_get_type (void);
208 GstFlowReturn gst_base_sink_do_preroll (GstBaseSink *sink, GstMiniObject *obj);
211 GstFlowReturn gst_base_sink_wait_preroll (GstBaseSink *sink);
213 /* synchronizing against the clock */
216 void gst_base_sink_set_sync (GstBaseSink *sink, gboolean sync);
219 gboolean gst_base_sink_get_sync (GstBaseSink *sink);
221 /* Drop buffers which are out of segment */
224 void gst_base_sink_set_drop_out_of_segment (GstBaseSink *sink, gboolean drop_out_of_segment);
227 gboolean gst_base_sink_get_drop_out_of_segment (GstBaseSink *sink);
229 /* dropping late buffers */
232 void gst_base_sink_set_max_lateness (GstBaseSink *sink, gint64 max_lateness);
235 gint64 gst_base_sink_get_max_lateness (GstBaseSink *sink);
240 void gst_base_sink_set_qos_enabled (GstBaseSink *sink, gboolean enabled);
243 gboolean gst_base_sink_is_qos_enabled (GstBaseSink *sink);
245 /* doing async state changes */
248 void gst_base_sink_set_async_enabled (GstBaseSink *sink, gboolean enabled);
251 gboolean gst_base_sink_is_async_enabled (GstBaseSink *sink);
253 /* tuning synchronisation */
256 void gst_base_sink_set_ts_offset (GstBaseSink *sink, GstClockTimeDiff offset);
259 GstClockTimeDiff gst_base_sink_get_ts_offset (GstBaseSink *sink);
264 GstSample * gst_base_sink_get_last_sample (GstBaseSink *sink);
267 void gst_base_sink_set_last_sample_enabled (GstBaseSink *sink, gboolean enabled);
270 gboolean gst_base_sink_is_last_sample_enabled (GstBaseSink *sink);
275 gboolean gst_base_sink_query_latency (GstBaseSink *sink, gboolean *live, gboolean *upstream_live,
276 GstClockTime *min_latency, GstClockTime *max_latency);
278 GstClockTime gst_base_sink_get_latency (GstBaseSink *sink);
283 void gst_base_sink_set_render_delay (GstBaseSink *sink, GstClockTime delay);
286 GstClockTime gst_base_sink_get_render_delay (GstBaseSink *sink);
291 void gst_base_sink_set_blocksize (GstBaseSink *sink, guint blocksize);
294 guint gst_base_sink_get_blocksize (GstBaseSink *sink);
299 void gst_base_sink_set_throttle_time (GstBaseSink *sink, guint64 throttle);
302 guint64 gst_base_sink_get_throttle_time (GstBaseSink *sink);
307 void gst_base_sink_set_max_bitrate (GstBaseSink *sink, guint64 max_bitrate);
310 guint64 gst_base_sink_get_max_bitrate (GstBaseSink *sink);
313 GstClockReturn gst_base_sink_wait_clock (GstBaseSink *sink, GstClockTime time,
314 GstClockTimeDiff * jitter);
316 GstFlowReturn gst_base_sink_wait (GstBaseSink *sink, GstClockTime time,
317 GstClockTimeDiff *jitter);
319 #ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
320 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBaseSink, gst_object_unref)
325 #endif /* __GST_BASE_SINK_H__ */