mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 10:40:34 +00:00
25d874ec9b
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.
94 lines
2.5 KiB
C
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__ */
|