gstreamer/gst/videoscale/gstvideoscale.h

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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_VIDEO_SCALE_H__
#define __GST_VIDEO_SCALE_H__
#include <gst/gst.h>
#include <gst/video/video.h>
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#include <gst/video/gstvideofilter.h>
#include "vs_image.h"
G_BEGIN_DECLS
GST_DEBUG_CATEGORY_EXTERN (video_scale_debug);
#define GST_CAT_DEFAULT video_scale_debug
#define GST_TYPE_VIDEO_SCALE \
(gst_video_scale_get_type())
#define GST_VIDEO_SCALE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_SCALE,GstVideoScale))
#define GST_VIDEO_SCALE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_SCALE,GstVideoScaleClass))
#define GST_IS_VIDEO_SCALE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_SCALE))
#define GST_IS_VIDEO_SCALE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_SCALE))
#define GST_VIDEO_SCALE_CAST(obj) ((GstVideoScale *)(obj))
/**
* GstVideoScaleMethod:
* @GST_VIDEO_SCALE_NEAREST: use nearest neighbour scaling (fast and ugly)
* @GST_VIDEO_SCALE_BILINEAR: use bilinear scaling (slower but prettier).
* @GST_VIDEO_SCALE_4TAP: use a 4-tap filter for scaling (slow).
* @GST_VIDEO_SCALE_LANCZOS: use a multitap Lanczos filter for scaling (slow).
*
* The videoscale method to use.
*/
typedef enum {
GST_VIDEO_SCALE_NEAREST,
GST_VIDEO_SCALE_BILINEAR,
GST_VIDEO_SCALE_4TAP,
GST_VIDEO_SCALE_LANCZOS
} GstVideoScaleMethod;
typedef struct _GstVideoScale GstVideoScale;
typedef struct _GstVideoScaleClass GstVideoScaleClass;
/**
* GstVideoScale:
*
* Opaque data structure
*/
struct _GstVideoScale {
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GstVideoFilter element;
/* properties */
GstVideoScaleMethod method;
gboolean add_borders;
double sharpness;
double sharpen;
gboolean dither;
int submethod;
double envelope;
gint borders_h;
gint borders_w;
/*< private >*/
guint8 *tmp_buf;
};
struct _GstVideoScaleClass {
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GstVideoFilterClass parent_class;
};
G_GNUC_INTERNAL GType gst_video_scale_get_type (void);
G_END_DECLS
#endif /* __GST_VIDEO_SCALE_H__ */