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09141c6e1f
Since we started depending on GLib 2.44, we can be sure this macro is defined (it will be a no-op on compilers that don't support it). For plugins we should just start using `G_DECLARE_FINAL_TYPE` which means we no longer need the macro there, but for most types in core we don't want to break ABI, which means it's better to just keep it like it is (and use the `#ifdef` instead).
161 lines
5.6 KiB
C
161 lines
5.6 KiB
C
/* GStreamer
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*
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
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* 2011 Stefan Sauer <ensonic@users.sf.net>
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*
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* gsttimedvaluecontrolsource.h: Base class for timeed value based control
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* sources
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_TIMED_VALUE_CONTROL_SOURCE_H__
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#define __GST_TIMED_VALUE_CONTROL_SOURCE_H__
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#include <glib-object.h>
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#include <gst/gst.h>
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#include <gst/controller/controller-prelude.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TIMED_VALUE_CONTROL_SOURCE \
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(gst_timed_value_control_source_get_type ())
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#define GST_TIMED_VALUE_CONTROL_SOURCE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSource))
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#define GST_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
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(G_TYPE_CHECK_CLASS_CAST ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
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#define GST_IS_TIMED_VALUE_CONTROL_SOURCE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
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#define GST_IS_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
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(G_TYPE_CHECK_CLASS_TYPE ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
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#define GST_TIMED_VALUE_CONTROL_SOURCE_GET_CLASS(inst) \
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(G_TYPE_INSTANCE_GET_CLASS ((inst), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
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typedef struct _GstTimedValueControlSource GstTimedValueControlSource;
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typedef struct _GstTimedValueControlSourceClass GstTimedValueControlSourceClass;
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typedef struct _GstTimedValueControlSourcePrivate GstTimedValueControlSourcePrivate;
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typedef struct _GstControlPoint GstControlPoint;
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/**
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* GstControlPoint:
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* @timestamp: timestamp of the value change
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* @value: the new value
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*
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* An internal structure for value+time and various temporary
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* values used for interpolation. This "inherits" from
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* GstTimedValue.
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*/
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struct _GstControlPoint
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{
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/* fields from GstTimedValue. DO NOT CHANGE! */
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GstClockTime timestamp;
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gdouble value;
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/*< private >*/
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/* Caches for the interpolators */
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/* FIXME: we should not have this here already ... */
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union {
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struct { /* 16 bytes */
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gdouble h;
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gdouble z;
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} cubic;
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struct { /* 24 bytes */
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gdouble c1s, c2s, c3s;
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} cubic_monotonic;
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guint8 _gst_reserved[64];
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} cache;
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};
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GST_CONTROLLER_API
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GType gst_control_point_get_type (void);
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/**
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* GstTimedValueControlSource:
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*
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* The instance structure of #GstControlSource.
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*/
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struct _GstTimedValueControlSource {
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GstControlSource parent;
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/*< protected >*/
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GMutex lock;
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GSequence *values; /* List of GstControlPoint */
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gint nvalues; /* Number of control points */
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gboolean valid_cache;
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/*< private >*/
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GstTimedValueControlSourcePrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstTimedValueControlSourceClass {
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GstControlSourceClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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#define GST_TIMED_VALUE_CONTROL_SOURCE_LOCK(o) \
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g_mutex_lock(&((GstTimedValueControlSource *)o)->lock)
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#define GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK(o) \
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g_mutex_unlock(&((GstTimedValueControlSource *)o)->lock)
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GST_CONTROLLER_API
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GType gst_timed_value_control_source_get_type (void);
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/* Functions */
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GST_CONTROLLER_API
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GSequenceIter * gst_timed_value_control_source_find_control_point_iter (
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GstTimedValueControlSource * self,
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GstClockTime timestamp);
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GST_CONTROLLER_API
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gboolean gst_timed_value_control_source_set (GstTimedValueControlSource * self,
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GstClockTime timestamp,
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const gdouble value);
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GST_CONTROLLER_API
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gboolean gst_timed_value_control_source_set_from_list (GstTimedValueControlSource * self,
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const GSList * timedvalues);
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GST_CONTROLLER_API
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gboolean gst_timed_value_control_source_unset (GstTimedValueControlSource * self,
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GstClockTime timestamp);
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GST_CONTROLLER_API
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void gst_timed_value_control_source_unset_all (GstTimedValueControlSource *self);
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GST_CONTROLLER_API
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GList * gst_timed_value_control_source_get_all (GstTimedValueControlSource * self);
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GST_CONTROLLER_API
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gint gst_timed_value_control_source_get_count (GstTimedValueControlSource * self);
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GST_CONTROLLER_API
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void gst_timed_value_control_invalidate_cache (GstTimedValueControlSource * self);
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GST_CONTROLLER_API
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void gst_control_point_free (GstControlPoint * cp);
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GST_CONTROLLER_API
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GstControlPoint * gst_control_point_copy (GstControlPoint * cp);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstTimedValueControlSource, gst_object_unref)
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G_END_DECLS
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#endif /* __GST_TIMED_VALUE_CONTROL_SOURCE_H__ */
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