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/* GStreamer
*
* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
* 2011 Stefan Sauer <ensonic@users.sf.net>
*
* gsttimedvaluecontrolsource.h: Base class for timeed value based control
* sources
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_TIMED_VALUE_CONTROL_SOURCE_H__
#define __GST_TIMED_VALUE_CONTROL_SOURCE_H__
#include <glib-object.h>
#include <gst/gst.h>
#include <gst/gstcontrolsource.h>
G_BEGIN_DECLS
#define GST_TYPE_TIMED_VALUE_CONTROL_SOURCE \
(gst_timed_value_control_source_get_type ())
#define GST_TIMED_VALUE_CONTROL_SOURCE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSource))
#define GST_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
(G_TYPE_CHECK_CLASS_CAST ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
#define GST_IS_TIMED_VALUE_CONTROL_SOURCE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
#define GST_IS_TIMED_VALUE_CONTROL_SOURCE_CLASS(vtable) \
(G_TYPE_CHECK_CLASS_TYPE ((vtable), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE))
#define GST_TIMED_VALUE_CONTROL_SOURCE_GET_CLASS(inst) \
(G_TYPE_INSTANCE_GET_CLASS ((inst), GST_TYPE_TIMED_VALUE_CONTROL_SOURCE, GstTimedValueControlSourceClass))
typedef struct _GstTimedValueControlSource GstTimedValueControlSource;
typedef struct _GstTimedValueControlSourceClass GstTimedValueControlSourceClass;
typedef struct _GstTimedValueControlSourcePrivate GstTimedValueControlSourcePrivate;
/**
* GstControlPoint:
*
* a internal structure for value+time and various temporary
* values used for interpolation. This "inherits" from
* GstTimedValue.
*/
typedef struct _GstControlPoint
{
/* fields from GstTimedValue. DO NOT CHANGE! */
GstClockTime timestamp; /* timestamp of the value change */
gdouble value; /* the new value */
/* internal fields */
/* Caches for the interpolators */
// FIXME: we should not have this here already ...
union {
struct {
gdouble h;
gdouble z;
} cubic;
} cache;
} GstControlPoint;
/**
* GstTimedValueControlSource:
*
* The instance structure of #GstControlSource.
*/
struct _GstTimedValueControlSource {
GstControlSource parent;
/*< protected >*/
GMutex lock;
GSequence *values; /* List of GstControlPoint */
gint nvalues; /* Number of control points */
gboolean valid_cache;
GstTimedValueControlSourcePrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstTimedValueControlSourceClass {
GstControlSourceClass parent_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
#define GST_TIMED_VALUE_CONTROL_SOURCE_LOCK(o) \
g_mutex_lock(&((GstTimedValueControlSource *)o)->lock)
#define GST_TIMED_VALUE_CONTROL_SOURCE_UNLOCK(o) \
g_mutex_unlock(&((GstTimedValueControlSource *)o)->lock)
GType gst_timed_value_control_source_get_type (void);
/* Functions */
GSequenceIter * gst_timed_value_control_source_find_control_point_iter (
GstTimedValueControlSource * self,
GstClockTime timestamp);
gboolean gst_timed_value_control_source_set (GstTimedValueControlSource * self,
GstClockTime timestamp,
const gdouble value);
gboolean gst_timed_value_control_source_set_from_list (GstTimedValueControlSource * self,
const GSList * timedvalues);
gboolean gst_timed_value_control_source_unset (GstTimedValueControlSource * self,
GstClockTime timestamp);
void gst_timed_value_control_source_unset_all (GstTimedValueControlSource *self);
GList * gst_timed_value_control_source_get_all (GstTimedValueControlSource * self);
gint gst_timed_value_control_source_get_count (GstTimedValueControlSource * self);
void gst_timed_value_control_invalidate_cache (GstTimedValueControlSource * self);
G_END_DECLS
#endif /* __GST_TIMED_VALUE_CONTROL_SOURCE_H__ */
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