mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 20:51:13 +00:00
92d3246f76
One omission: gst_allocator_sysmem_get_type() was exported but never in any public header file.
150 lines
4.7 KiB
C
150 lines
4.7 KiB
C
/* GStreamer
|
|
*
|
|
* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
|
|
*
|
|
* gstcontrolsource.h: Interface declaration for 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __GST_CONTROL_SOURCE_H__
|
|
#define __GST_CONTROL_SOURCE_H__
|
|
|
|
#include <gst/gstconfig.h>
|
|
|
|
#include <glib-object.h>
|
|
|
|
#include <gst/gstclock.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_CONTROL_SOURCE \
|
|
(gst_control_source_get_type())
|
|
#define GST_CONTROL_SOURCE(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CONTROL_SOURCE,GstControlSource))
|
|
#define GST_CONTROL_SOURCE_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CONTROL_SOURCE,GstControlSourceClass))
|
|
#define GST_IS_CONTROL_SOURCE(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CONTROL_SOURCE))
|
|
#define GST_IS_CONTROL_SOURCE_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CONTROL_SOURCE))
|
|
#define GST_CONTROL_SOURCE_GET_CLASS(obj) \
|
|
(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_CONTOL_SOURCE, GstControlSourceClass))
|
|
|
|
typedef struct _GstControlSource GstControlSource;
|
|
typedef struct _GstControlSourceClass GstControlSourceClass;
|
|
typedef struct _GstTimedValue GstTimedValue;
|
|
typedef struct _GstValueArray GstValueArray;
|
|
|
|
/**
|
|
* GstTimedValue:
|
|
* @timestamp: timestamp of the value change
|
|
* @value: the corresponding value
|
|
*
|
|
* Structure for saving a timestamp and a value.
|
|
*/
|
|
struct _GstTimedValue
|
|
{
|
|
GstClockTime timestamp;
|
|
gdouble value;
|
|
};
|
|
|
|
/**
|
|
* GstControlSourceGetValue:
|
|
* @self: the #GstControlSource instance
|
|
* @timestamp: timestamp for which a value should be calculated
|
|
* @value: a value which will be set to the result.
|
|
*
|
|
* Function for returning a value for a given timestamp.
|
|
*
|
|
* Returns: %TRUE if the value was successfully calculated.
|
|
*
|
|
*/
|
|
typedef gboolean (* GstControlSourceGetValue) (GstControlSource *self,
|
|
GstClockTime timestamp, gdouble *value);
|
|
|
|
/**
|
|
* GstControlSourceGetValueArray:
|
|
* @self: the #GstControlSource instance
|
|
* @timestamp: timestamp for which a value should be calculated
|
|
* @interval: the time spacing between subsequent values
|
|
* @n_values: the number of values
|
|
* @values: array to put control-values in
|
|
*
|
|
* Function for returning an array of values for starting at a given timestamp.
|
|
*
|
|
* Returns: %TRUE if the values were successfully calculated.
|
|
*
|
|
*/
|
|
typedef gboolean (* GstControlSourceGetValueArray) (GstControlSource *self,
|
|
GstClockTime timestamp, GstClockTime interval, guint n_values, gdouble *values);
|
|
|
|
/**
|
|
* GstControlSource:
|
|
* @get_value: Function for returning a value for a given timestamp
|
|
* @get_value_array: Function for returning a values array for a given timestamp
|
|
*
|
|
* The instance structure of #GstControlSource.
|
|
*/
|
|
struct _GstControlSource {
|
|
GstObject parent;
|
|
|
|
/*< public >*/
|
|
GstControlSourceGetValue get_value; /* Returns the value for a property at a given timestamp */
|
|
GstControlSourceGetValueArray get_value_array; /* Returns values for a property in a given timespan */
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
/**
|
|
* GstControlSourceClass:
|
|
* @parent_class: Parent class
|
|
*
|
|
* The class structure of #GstControlSource.
|
|
*/
|
|
|
|
struct _GstControlSourceClass
|
|
{
|
|
GstObjectClass parent_class;
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
GST_EXPORT
|
|
GType gst_control_source_get_type (void);
|
|
|
|
/* Functions */
|
|
|
|
GST_EXPORT
|
|
gboolean gst_control_source_get_value (GstControlSource *self, GstClockTime timestamp,
|
|
gdouble *value);
|
|
GST_EXPORT
|
|
gboolean gst_control_source_get_value_array (GstControlSource *self, GstClockTime timestamp,
|
|
GstClockTime interval, guint n_values,
|
|
gdouble *values);
|
|
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstControlSource, gst_object_unref)
|
|
#endif
|
|
|
|
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstValueArray, gst_object_unref)
|
|
#endif
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_CONTROL_SOURCE_H__ */
|