1 /*

     2  * Image Scaling Functions (4 tap)

     3  * Copyright (c) 2005 David A. Schleef <ds@schleef.org>

     4  * All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions

     8  * are met:

     9  * 1. Redistributions of source code must retain the above copyright

    10  *    notice, this list of conditions and the following disclaimer.

    11  * 2. Redistributions in binary form must reproduce the above copyright

    12  *    notice, this list of conditions and the following disclaimer in the

    13  *    documentation and/or other materials provided with the distribution.

    14  * 

    15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

    16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,

    19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

    24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    27 

    28 #ifndef _VS_4TAP_H_

    29 #define _VS_4TAP_H_

    30 

    31 #include "vs_image.h"

    32 

    33 #include <gst/liboil.h>

    34 

    35 void vs_4tap_init (void);

    36 void vs_scanline_resample_4tap_Y (uint8_t *dest, uint8_t *src,

    37     int n, int src_width, int *xacc, int increment);

    38 void vs_scanline_merge_4tap_Y (uint8_t *dest, uint8_t *src1, uint8_t *src2,

    39     uint8_t *src3, uint8_t *src4, int n, int acc);

    40 void vs_image_scale_4tap_Y (const VSImage * dest, const VSImage * src,

    41     uint8_t * tmpbuf);

    42 

    43 #endif

    44