1 /* GStreamer 2 * 3 * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org> 4 * 5 * gstinterpolationcontrolsource.h: Control source that provides several 6 * interpolation methods 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public 19 * License along with this library; if not, write to the 20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23 24 #ifndef __GST_INTERPOLATION_CONTROL_SOURCE_H__ 25 #define __GST_INTERPOLATION_CONTROL_SOURCE_H__ 26 27 #include <glib-object.h> 28 #include <gst/gst.h> 29 30 #include <gst/controller/gsttimedvaluecontrolsource.h> 31 #include <gst/controller/controller-enumtypes.h> 32 33 G_BEGIN_DECLS 34 35 #define GST_TYPE_INTERPOLATION_CONTROL_SOURCE \ 36 (gst_interpolation_control_source_get_type ()) 37 #define GST_INTERPOLATION_CONTROL_SOURCE(obj) \ 38 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_INTERPOLATION_CONTROL_SOURCE, GstInterpolationControlSource)) 39 #define GST_INTERPOLATION_CONTROL_SOURCE_CLASS(vtable) \ 40 (G_TYPE_CHECK_CLASS_CAST ((vtable), GST_TYPE_INTERPOLATION_CONTROL_SOURCE, GstInterpolationControlSourceClass)) 41 #define GST_IS_INTERPOLATION_CONTROL_SOURCE(obj) \ 42 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_INTERPOLATION_CONTROL_SOURCE)) 43 #define GST_IS_INTERPOLATION_CONTROL_SOURCE_CLASS(vtable) \ 44 (G_TYPE_CHECK_CLASS_TYPE ((vtable), GST_TYPE_INTERPOLATION_CONTROL_SOURCE)) 45 #define GST_INTERPOLATION_CONTROL_SOURCE_GET_CLASS(inst) \ 46 (G_TYPE_INSTANCE_GET_CLASS ((inst), GST_TYPE_INTERPOLATION_CONTROL_SOURCE, GstInterpolationControlSourceClass)) 47 48 typedef struct _GstInterpolationControlSource GstInterpolationControlSource; 49 typedef struct _GstInterpolationControlSourceClass GstInterpolationControlSourceClass; 50 typedef struct _GstInterpolationControlSourcePrivate GstInterpolationControlSourcePrivate; 51 52 /** 53 * GstInterpolationMode: 54 * @GST_INTERPOLATION_MODE_NONE: steps-like interpolation, default 55 * @GST_INTERPOLATION_MODE_LINEAR: linear interpolation 56 * @GST_INTERPOLATION_MODE_CUBIC: cubic interpolation (natural), may overshoot 57 * the min or max values set by the control point, but is more 'curvy' 58 * @GST_INTERPOLATION_MODE_CUBIC_MONOTONIC: monotonic cubic interpolation, will not 59 * produce any values outside of the min-max range set by the control points 60 * (Since: 1.8) 61 * 62 * The various interpolation modes available. 63 */ 64 typedef enum 65 { 66 GST_INTERPOLATION_MODE_NONE, 67 GST_INTERPOLATION_MODE_LINEAR, 68 GST_INTERPOLATION_MODE_CUBIC, 69 GST_INTERPOLATION_MODE_CUBIC_MONOTONIC, 70 } GstInterpolationMode; 71 72 /** 73 * GstInterpolationControlSource: 74 * 75 * The instance structure of #GstControlSource. 76 */ 77 struct _GstInterpolationControlSource { 78 GstTimedValueControlSource parent; 79 80 /*< private >*/ 81 GstInterpolationControlSourcePrivate *priv; 82 gpointer _gst_reserved[GST_PADDING]; 83 }; 84 85 struct _GstInterpolationControlSourceClass { 86 GstTimedValueControlSourceClass parent_class; 87 88 /*< private >*/ 89 gpointer _gst_reserved[GST_PADDING]; 90 }; 91 92 GST_CONTROLLER_API 93 GType gst_interpolation_control_source_get_type (void); 94 95 /* Functions */ 96 97 GST_CONTROLLER_API 98 GstControlSource * gst_interpolation_control_source_new (void); 99 100 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstInterpolationControlSource, gst_object_unref) 101 102 G_END_DECLS 103 104 #endif /* __GST_INTERPOLATION_CONTROL_SOURCE_H__ */ 105