gstreamer/subprojects/gst-plugins-base/gst/videoscale/gstvideoscale.h

93 lines
2.7 KiB
C

/* 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>
#include <gst/video/gstvideofilter.h>
G_BEGIN_DECLS
#define GST_TYPE_VIDEO_SCALE (gst_video_scale_get_type())
#define GST_VIDEO_SCALE_CAST(obj) ((GstVideoScale *)(obj))
G_DECLARE_FINAL_TYPE (GstVideoScale, gst_video_scale, GST, VIDEO_SCALE,
GstVideoFilter)
/**
* GstVideoScaleMethod:
* @GST_VIDEO_SCALE_NEAREST: use nearest neighbour scaling (fast and ugly)
* @GST_VIDEO_SCALE_BILINEAR: use 2-tap bilinear scaling (slower but prettier).
* @GST_VIDEO_SCALE_4TAP: use a 4-tap sinc filter for scaling (slow).
* @GST_VIDEO_SCALE_LANCZOS: use a multitap Lanczos filter for scaling (slow).
* @GST_VIDEO_SCALE_BILINEAR2: use a multitap bilinear filter
* @GST_VIDEO_SCALE_SINC: use a multitap sinc filter
* @GST_VIDEO_SCALE_HERMITE: use a multitap bicubic Hermite filter
* @GST_VIDEO_SCALE_SPLINE: use a multitap bicubic spline filter
* @GST_VIDEO_SCALE_CATROM: use a multitap bicubic Catmull-Rom filter
* @GST_VIDEO_SCALE_MITCHELL: use a multitap bicubic Mitchell filter
*
* The videoscale method to use.
*/
typedef enum {
GST_VIDEO_SCALE_NEAREST,
GST_VIDEO_SCALE_BILINEAR,
GST_VIDEO_SCALE_4TAP,
GST_VIDEO_SCALE_LANCZOS,
GST_VIDEO_SCALE_BILINEAR2,
GST_VIDEO_SCALE_SINC,
GST_VIDEO_SCALE_HERMITE,
GST_VIDEO_SCALE_SPLINE,
GST_VIDEO_SCALE_CATROM,
GST_VIDEO_SCALE_MITCHELL
} GstVideoScaleMethod;
/**
* GstVideoScale:
*
* Opaque data structure
*/
struct _GstVideoScale {
GstVideoFilter element;
/* properties */
GstVideoScaleMethod method;
gboolean add_borders;
double sharpness;
double sharpen;
gboolean dither;
int submethod;
double envelope;
gboolean gamma_decode;
gint n_threads;
GstVideoConverter *convert;
gint borders_h;
gint borders_w;
};
GST_ELEMENT_REGISTER_DECLARE (videoscale);
G_END_DECLS
#endif /* __GST_VIDEO_SCALE_H__ */