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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
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_VIDEO_SCALE_H__
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#define __GST_VIDEO_SCALE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include "vs_image.h"
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G_BEGIN_DECLS
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GST_DEBUG_CATEGORY_EXTERN (video_scale_debug);
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#define GST_CAT_DEFAULT video_scale_debug
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#define GST_TYPE_VIDEO_SCALE \
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(gst_video_scale_get_type())
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#define GST_VIDEO_SCALE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_SCALE,GstVideoScale))
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#define GST_VIDEO_SCALE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_SCALE,GstVideoScaleClass))
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#define GST_IS_VIDEO_SCALE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_SCALE))
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#define GST_IS_VIDEO_SCALE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_SCALE))
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/**
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* GstVideoScaleMethod:
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* @GST_VIDEO_SCALE_NEAREST: use nearest neighbour scaling (fast and ugly)
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* @GST_VIDEO_SCALE_BILINEAR: use bilinear scaling (slower but prettier).
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* @GST_VIDEO_SCALE_4TAP: use a 4-tap filter for scaling (slow).
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*
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* The videoscale method to use.
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*/
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typedef enum {
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GST_VIDEO_SCALE_NEAREST,
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GST_VIDEO_SCALE_BILINEAR,
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GST_VIDEO_SCALE_4TAP
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} GstVideoScaleMethod;
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typedef struct _GstVideoScale GstVideoScale;
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typedef struct _GstVideoScaleClass GstVideoScaleClass;
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/**
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* GstVideoScale:
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*
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* Opaque data structure
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*/
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struct _GstVideoScale {
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GstBaseTransform element;
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GstVideoScaleMethod method;
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/* negotiated stuff */
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int format;
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VSImage src;
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VSImage dest;
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guint src_size;
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guint dest_size;
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gint to_width;
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gint to_height;
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gint from_width;
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gint from_height;
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/*< private >*/
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guint8 *tmp_buf;
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};
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struct _GstVideoScaleClass {
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GstBaseTransformClass parent_class;
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};
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GType gst_video_scale_get_type(void);
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G_END_DECLS
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#endif /* __GST_VIDEO_SCALE_H__ */
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