gstreamer/gst/videoscale/gstvideoscale.h
David Schleef 25d874ec9b gst/videoscale/: Add a 4-tap image scaler. Theoretically looks much prettier.
Original commit message from CVS:
* gst/videoscale/Makefile.am:
* gst/videoscale/gstvideoscale.c:
* gst/videoscale/gstvideoscale.h:
* gst/videoscale/vs_4tap.c:
* gst/videoscale/vs_4tap.h:
* gst/videoscale/vs_image.c:
* gst/videoscale/vs_image.h:
* gst/videoscale/vs_scanline.c:
* gst/videoscale/vs_scanline.h:
Add a 4-tap image scaler.  Theoretically looks much prettier.
The tap calculation could use some improvement.
2006-11-14 23:08:38 +00:00

94 lines
2.5 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_VIDEO_SCALE_H__
#define __GST_VIDEO_SCALE_H__
#include <gst/gst.h>
#include <gst/base/gstbasetransform.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))
/**
* 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).
*
* The videoscale method to use.
*/
typedef enum {
GST_VIDEO_SCALE_NEAREST,
GST_VIDEO_SCALE_BILINEAR,
GST_VIDEO_SCALE_4TAP
} GstVideoScaleMethod;
typedef struct _GstVideoScale GstVideoScale;
typedef struct _GstVideoScaleClass GstVideoScaleClass;
/**
* GstVideoScale:
*
* Opaque data structure
*/
struct _GstVideoScale {
GstBaseTransform element;
GstVideoScaleMethod method;
/* negotiated stuff */
int format;
VSImage src;
VSImage dest;
guint src_size;
guint dest_size;
gint to_width;
gint to_height;
gint from_width;
gint from_height;
/*< private >*/
guint8 *tmp_buf;
};
struct _GstVideoScaleClass {
GstBaseTransformClass parent_class;
};
GType gst_video_scale_get_type(void);
G_END_DECLS
#endif /* __GST_VIDEO_SCALE_H__ */