summaryrefslogtreecommitdiff
path: root/gst/videoscale/vs_4tap.c
diff options
context:
space:
mode:
Diffstat (limited to 'gst/videoscale/vs_4tap.c')
-rw-r--r--gst/videoscale/vs_4tap.c1339
1 files changed, 0 insertions, 1339 deletions
diff --git a/gst/videoscale/vs_4tap.c b/gst/videoscale/vs_4tap.c
deleted file mode 100644
index ffe96aae..00000000
--- a/gst/videoscale/vs_4tap.c
+++ /dev/null
@@ -1,1339 +0,0 @@
-/*
- * Image Scaling Functions (4 tap)
- * Copyright (c) 2005 David A. Schleef <ds@schleef.org>
- * Copyright (c) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "vs_image.h"
-#include "vs_scanline.h"
-
-#include "vs_4tap.h"
-
-#include <liboil/liboil.h>
-#include <math.h>
-
-#define SHIFT 10
-
-#define MAX(a,b) (((a) > (b)) ? (a) : (b))
-#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#define CLAMP(x,a,b) MAX(MIN((x),(b)),(a))
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#ifdef _MSC_VER
-#define rint(x) (floor((x)+0.5))
-#endif
-
-static int16_t vs_4tap_taps[256][4];
-
-static double
-vs_4tap_func (double x)
-{
-#if 0
- if (x < -1)
- return 0;
- if (x > 1)
- return 0;
- if (x < 0)
- return 1 + x;
- return 1 - x;
-#endif
-#if 0
- if (x == 0)
- return 1;
- return sin (M_PI * x) / (M_PI * x) * (1 - 0.25 * x * x);
-#endif
-#if 1
- if (x == 0)
- return 1;
- return sin (M_PI * x) / (M_PI * x);
-#endif
-}
-
-void
-vs_4tap_init (void)
-{
- int i;
- double a, b, c, d;
- double sum;
-
- for (i = 0; i < 256; i++) {
- a = vs_4tap_func (-1 - i / 256.0);
- b = vs_4tap_func (0 - i / 256.0);
- c = vs_4tap_func (1 - i / 256.0);
- d = vs_4tap_func (2 - i / 256.0);
- sum = a + b + c + d;
-
- vs_4tap_taps[i][0] = rint ((1 << SHIFT) * (a / sum));
- vs_4tap_taps[i][1] = rint ((1 << SHIFT) * (b / sum));
- vs_4tap_taps[i][2] = rint ((1 << SHIFT) * (c / sum));
- vs_4tap_taps[i][3] = rint ((1 << SHIFT) * (d / sum));
- }
-}
-
-
-void
-vs_scanline_resample_4tap_Y (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = (acc & 0xff00) >> 8;
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j - 1, 0)];
- y += vs_4tap_taps[x][1] * src[j];
- y += vs_4tap_taps[x][2] * src[j + 1];
- y += vs_4tap_taps[x][3] * src[j + 2];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j - 1, 0, src_width - 1)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j, 0, src_width - 1)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j + 1, 0, src_width - 1)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j + 2, 0, src_width - 1)];
- }
- y += (1 << (SHIFT - 1));
- dest[i] = CLAMP (y >> SHIFT, 0, 255);
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_Y (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int a, b, c, d;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < n; i++) {
- y = a * src1[i];
- y += b * src2[i];
- y += c * src3[i];
- y += d * src4[i];
- y += (1 << (SHIFT - 1));
- dest[i] = CLAMP (y >> SHIFT, 0, 255);
- }
-}
-
-
-void
-vs_image_scale_4tap_Y (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_Y (tmpbuf + i * dest->width,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_Y (tmpbuf + ((k + 3) & 3) * dest->width,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->width;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->width;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->width;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->width;
- vs_scanline_merge_4tap_Y (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-void
-vs_scanline_resample_4tap_Y16 (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
- uint16_t *d = (uint16_t *) dest, *s = (uint16_t *) src;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = (acc & 0xff00) >> 8;
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * s[MAX (j - 1, 0)];
- y += vs_4tap_taps[x][1] * s[j];
- y += vs_4tap_taps[x][2] * s[j + 1];
- y += vs_4tap_taps[x][3] * s[j + 2];
- } else {
- y = vs_4tap_taps[x][0] * s[CLAMP (j - 1, 0, src_width - 1)];
- y += vs_4tap_taps[x][1] * s[CLAMP (j, 0, src_width - 1)];
- y += vs_4tap_taps[x][2] * s[CLAMP (j + 1, 0, src_width - 1)];
- y += vs_4tap_taps[x][3] * s[CLAMP (j + 2, 0, src_width - 1)];
- }
- y += (1 << (SHIFT - 1));
- d[i] = CLAMP (y >> SHIFT, 0, 65535);
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_Y16 (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int a, b, c, d;
- uint16_t *de = (uint16_t *) dest, *s1 = (uint16_t *) src1;
- uint16_t *s2 = (uint16_t *) src2, *s3 = (uint16_t *) src3;
- uint16_t *s4 = (uint16_t *) src4;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < n; i++) {
- y = a * s1[i];
- y += b * s2[i];
- y += c * s3[i];
- y += d * s4[i];
- y += (1 << (SHIFT - 1));
- de[i] = CLAMP (y >> SHIFT, 0, 65535);
- }
-}
-
-
-void
-vs_image_scale_4tap_Y16 (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_Y16 (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_Y16 (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_Y16 (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-void
-vs_scanline_resample_4tap_RGBA (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
- int off;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- for (off = 0; off < 4; off++) {
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX ((j - 1) * 4 + off, 0)];
- y += vs_4tap_taps[x][1] * src[j * 4 + off];
- y += vs_4tap_taps[x][2] * src[(j + 1) * 4 + off];
- y += vs_4tap_taps[x][3] * src[(j + 2) * 4 + off];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP ((j - 1) * 4 + off, 0,
- 4 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + off, 0,
- 4 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][2] * src[CLAMP ((j + 1) * 4 + off, 0,
- 4 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][3] * src[CLAMP ((j + 2) * 4 + off, 0,
- 4 * (src_width - 1) + off)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + off] = CLAMP (y >> SHIFT, 0, 255);
- }
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_RGBA (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int off;
- int a, b, c, d;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < n; i++) {
- for (off = 0; off < 4; off++) {
- y = a * src1[i * 4 + off];
- y += b * src2[i * 4 + off];
- y += c * src3[i * 4 + off];
- y += d * src4[i * 4 + off];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + off] = CLAMP (y >> SHIFT, 0, 255);
- }
- }
-}
-
-void
-vs_image_scale_4tap_RGBA (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_RGBA (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_RGBA (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_RGBA (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-void
-vs_scanline_resample_4tap_RGB (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
- int off;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- for (off = 0; off < 3; off++) {
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX ((j - 1) * 3 + off, 0)];
- y += vs_4tap_taps[x][1] * src[j * 3 + off];
- y += vs_4tap_taps[x][2] * src[(j + 1) * 3 + off];
- y += vs_4tap_taps[x][3] * src[(j + 2) * 3 + off];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP ((j - 1) * 3 + off, 0,
- 3 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 3 + off, 0,
- 3 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][2] * src[CLAMP ((j + 1) * 3 + off, 0,
- 3 * (src_width - 1) + off)];
- y += vs_4tap_taps[x][3] * src[CLAMP ((j + 2) * 3 + off, 0,
- 3 * (src_width - 1) + off)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 3 + off] = CLAMP (y >> SHIFT, 0, 255);
- }
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_RGB (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int off;
- int a, b, c, d;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < n; i++) {
- for (off = 0; off < 3; off++) {
- y = a * src1[i * 3 + off];
- y += b * src2[i * 3 + off];
- y += c * src3[i * 3 + off];
- y += d * src4[i * 3 + off];
- y += (1 << (SHIFT - 1));
- dest[i * 3 + off] = CLAMP (y >> SHIFT, 0, 255);
- }
- }
-}
-
-void
-vs_image_scale_4tap_RGB (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_RGB (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-void
-vs_scanline_resample_4tap_YUYV (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
- int quads = (n + 1) / 2;
- int last_y = 2 * (src_width - 1);
- int last_u =
- MAX ((2 * (src_width - 1) % 4 ==
- 0) ? 2 * (src_width - 1) + 1 : 2 * (src_width - 1) - 1, 1);
- int last_v =
- MAX ((2 * (src_width - 1) % 4 ==
- 2) ? 2 * (src_width - 1) + 1 : 2 * (src_width - 1) - 1, 1);
-
- acc = *xacc;
- for (i = 0; i < quads; i++) {
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 2 + 0 - 2, 0)];
- y += vs_4tap_taps[x][1] * src[j * 2 + 0];
- y += vs_4tap_taps[x][2] * src[j * 2 + 0 + 2];
- y += vs_4tap_taps[x][3] * src[j * 2 + 0 + 4];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 2 + 0 - 2, 0, last_y)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 2 + 0, 0, last_y)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 2 + 0 + 2, 0, last_y)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 2 + 0 + 4, 0, last_y)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 0] = CLAMP (y >> SHIFT, 0, 255);
-
- j = acc >> 17;
- x = (acc & 0x1ffff) >> 9;
-
- if (2 * (j - 1) >= 0 && 2 * (j + 4) < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 4 + 1 - 4, 1)];
- y += vs_4tap_taps[x][1] * src[j * 4 + 1];
- y += vs_4tap_taps[x][2] * src[j * 4 + 1 + 4];
- y += vs_4tap_taps[x][3] * src[j * 4 + 1 + 8];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 1 - 4, 1, last_u)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 1, 1, last_u)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 1 + 4, 1, last_u)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 1 + 8, 1, last_u)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 1] = CLAMP (y >> SHIFT, 0, 255);
-
- if (2 * i + 1 < n) {
- if (2 * (j - 1) >= 0 && 2 * (j + 4) < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 4 + 3 - 4, 3)];
- y += vs_4tap_taps[x][1] * src[j * 4 + 3];
- y += vs_4tap_taps[x][2] * src[j * 4 + 3 + 4];
- y += vs_4tap_taps[x][3] * src[j * 4 + 3 + 8];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 3 - 4, 3, last_v)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 3, 3, last_v)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 3 + 4, 3, last_v)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 3 + 8, 3, last_v)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 3] = CLAMP (y >> SHIFT, 0, 255);
- }
-
- acc += increment;
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- if (2 * i + 1 < n) {
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 2 + 0 - 2, 0)];
- y += vs_4tap_taps[x][1] * src[j * 2 + 0];
- y += vs_4tap_taps[x][2] * src[j * 2 + 0 + 2];
- y += vs_4tap_taps[x][3] * src[j * 2 + 0 + 4];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 2 + 0 - 2, 0, last_y)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 2 + 0, 0, last_y)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 2 + 0 + 2, 0, last_y)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 2 + 0 + 4, 0, last_y)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 2] = CLAMP (y >> SHIFT, 0, 255);
- acc += increment;
- }
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_YUYV (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int a, b, c, d;
- int quads = (n + 1) / 2;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < quads; i++) {
- y = a * src1[i * 4 + 0];
- y += b * src2[i * 4 + 0];
- y += c * src3[i * 4 + 0];
- y += d * src4[i * 4 + 0];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 0] = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * src1[i * 4 + 1];
- y += b * src2[i * 4 + 1];
- y += c * src3[i * 4 + 1];
- y += d * src4[i * 4 + 1];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 1] = CLAMP (y >> SHIFT, 0, 255);
-
- if (2 * i + 1 < n) {
- y = a * src1[i * 4 + 2];
- y += b * src2[i * 4 + 2];
- y += c * src3[i * 4 + 2];
- y += d * src4[i * 4 + 2];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 2] = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * src1[i * 4 + 3];
- y += b * src2[i * 4 + 3];
- y += c * src3[i * 4 + 3];
- y += d * src4[i * 4 + 3];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 3] = CLAMP (y >> SHIFT, 0, 255);
- }
- }
-}
-
-void
-vs_image_scale_4tap_YUYV (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_YUYV (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_YUYV (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_YUYV (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-void
-vs_scanline_resample_4tap_UYVY (uint8_t * dest, uint8_t * src,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y;
- int quads = (n + 1) / 2;
- int last_y = 2 * (src_width - 1) + 1;
- int last_u =
- MAX ((2 * (src_width - 1) % 4 ==
- 0) ? 2 * (src_width - 1) : 2 * (src_width - 1) - 2, 0);
- int last_v =
- MAX ((2 * (src_width - 1) % 4 ==
- 2) ? 2 * (src_width - 1) : 2 * (src_width - 1) - 2, 0);
-
- acc = *xacc;
- for (i = 0; i < quads; i++) {
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 2 + 1 - 2, 1)];
- y += vs_4tap_taps[x][1] * src[j * 2 + 1];
- y += vs_4tap_taps[x][2] * src[j * 2 + 1 + 2];
- y += vs_4tap_taps[x][3] * src[j * 2 + 1 + 4];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 2 + 1 - 2, 1, last_y)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 2 + 1, 1, last_y)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 2 + 1 + 2, 1, last_y)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 2 + 1 + 4, 1, last_y)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 1] = CLAMP (y >> SHIFT, 0, 255);
-
- j = acc >> 17;
- x = (acc & 0x1ffff) >> 9;
-
- if (2 * (j - 2) >= 0 && 2 * (j + 4) < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 4 + 0 - 4, 0)];
- y += vs_4tap_taps[x][1] * src[j * 4 + 0];
- y += vs_4tap_taps[x][2] * src[j * 4 + 0 + 4];
- y += vs_4tap_taps[x][3] * src[j * 4 + 0 + 8];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 0 - 4, 0, last_u)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 0, 0, last_u)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 0 + 4, 0, last_u)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 0 + 8, 0, last_u)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 0] = CLAMP (y >> SHIFT, 0, 255);
-
- if (2 * i + 1 < n) {
- if (2 * (j - 1) >= 0 && 2 * (j + 4) < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 4 + 2 - 4, 2)];
- y += vs_4tap_taps[x][1] * src[j * 4 + 2];
- y += vs_4tap_taps[x][2] * src[j * 4 + 2 + 4];
- y += vs_4tap_taps[x][3] * src[j * 4 + 2 + 8];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 2 - 4, 2, last_v)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 2, 2, last_v)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 2 + 4, 2, last_v)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 2 + 8, 2, last_v)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 2] = CLAMP (y >> SHIFT, 0, 255);
- }
-
- acc += increment;
- j = acc >> 16;
- x = (acc & 0xffff) >> 8;
-
- if (2 * i + 1 < n) {
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * src[MAX (j * 2 + 1 - 2, 0)];
- y += vs_4tap_taps[x][1] * src[j * 2 + 1];
- y += vs_4tap_taps[x][2] * src[j * 2 + 1 + 2];
- y += vs_4tap_taps[x][3] * src[j * 2 + 1 + 4];
- } else {
- y = vs_4tap_taps[x][0] * src[CLAMP (j * 2 + 1 - 2, 1, last_y)];
- y += vs_4tap_taps[x][1] * src[CLAMP (j * 2 + 1, 1, last_y)];
- y += vs_4tap_taps[x][2] * src[CLAMP (j * 2 + 1 + 2, 1, last_y)];
- y += vs_4tap_taps[x][3] * src[CLAMP (j * 2 + 1 + 4, 1, last_y)];
- }
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 3] = CLAMP (y >> SHIFT, 0, 255);
- acc += increment;
- }
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_UYVY (uint8_t * dest, uint8_t * src1, uint8_t * src2,
- uint8_t * src3, uint8_t * src4, int n, int acc)
-{
- int i;
- int y;
- int a, b, c, d;
- int quads = (n + 1) / 2;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
- for (i = 0; i < quads; i++) {
- y = a * src1[i * 4 + 0];
- y += b * src2[i * 4 + 0];
- y += c * src3[i * 4 + 0];
- y += d * src4[i * 4 + 0];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 0] = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * src1[i * 4 + 1];
- y += b * src2[i * 4 + 1];
- y += c * src3[i * 4 + 1];
- y += d * src4[i * 4 + 1];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 1] = CLAMP (y >> SHIFT, 0, 255);
-
- if (2 * i + 1 < n) {
- y = a * src1[i * 4 + 2];
- y += b * src2[i * 4 + 2];
- y += c * src3[i * 4 + 2];
- y += d * src4[i * 4 + 2];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 2] = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * src1[i * 4 + 3];
- y += b * src2[i * 4 + 3];
- y += c * src3[i * 4 + 3];
- y += d * src4[i * 4 + 3];
- y += (1 << (SHIFT - 1));
- dest[i * 4 + 3] = CLAMP (y >> SHIFT, 0, 255);
- }
- }
-}
-
-void
-vs_image_scale_4tap_UYVY (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_UYVY (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_UYVY (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_UYVY (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-/* note that src and dest are uint16_t, and thus endian dependent */
-
-#define RGB565_R(x) (((x)&0xf800)>>8 | ((x)&0xf800)>>13)
-#define RGB565_G(x) (((x)&0x07e0)>>3 | ((x)&0x07e0)>>9)
-#define RGB565_B(x) (((x)&0x001f)<<3 | ((x)&0x001f)>>2)
-
-#define RGB565(r,g,b) \
- ((((r)<<8)&0xf800) | (((g)<<3)&0x07e0) | (((b)>>3)&0x001f))
-
-void
-vs_scanline_resample_4tap_RGB565 (uint8_t * dest_u8, uint8_t * src_u8,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y, y_r, y_b, y_g;
- uint16_t *dest = (uint16_t *) dest_u8;
- uint16_t *src = (uint16_t *) src_u8;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = acc & 0xffff >> 8;
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB565_R (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB565_R (src[j]);
- y += vs_4tap_taps[x][2] * RGB565_R (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB565_R (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB565_R (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB565_R (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB565_R (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB565_R (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_r = CLAMP (y >> SHIFT, 0, 255);
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB565_G (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB565_G (src[j]);
- y += vs_4tap_taps[x][2] * RGB565_G (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB565_G (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB565_G (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB565_G (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB565_G (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB565_G (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_g = CLAMP (y >> SHIFT, 0, 255);
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB565_B (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB565_B (src[j]);
- y += vs_4tap_taps[x][2] * RGB565_B (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB565_B (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB565_B (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB565_B (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB565_B (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB565_B (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_b = CLAMP (y >> SHIFT, 0, 255);
-
- dest[i] = RGB565 (y_r, y_b, y_g);
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_RGB565 (uint8_t * dest_u8, uint8_t * src1_u8,
- uint8_t * src2_u8, uint8_t * src3_u8, uint8_t * src4_u8, int n, int acc)
-{
- int i;
- int y, y_r, y_b, y_g;
- int a, b, c, d;
- uint16_t *dest = (uint16_t *) dest_u8;
- uint16_t *src1 = (uint16_t *) src1_u8;
- uint16_t *src2 = (uint16_t *) src2_u8;
- uint16_t *src3 = (uint16_t *) src3_u8;
- uint16_t *src4 = (uint16_t *) src4_u8;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
-
- for (i = 0; i < n; i++) {
- y = a * RGB565_R (src1[i]);
- y += b * RGB565_R (src2[i]);
- y += c * RGB565_R (src3[i]);
- y += d * RGB565_R (src4[i]);
- y += (1 << (SHIFT - 1));
- y_r = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * RGB565_G (src1[i]);
- y += b * RGB565_G (src2[i]);
- y += c * RGB565_G (src3[i]);
- y += d * RGB565_G (src4[i]);
- y += (1 << (SHIFT - 1));
- y_g = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * RGB565_B (src1[i]);
- y += b * RGB565_B (src2[i]);
- y += c * RGB565_B (src3[i]);
- y += d * RGB565_B (src4[i]);
- y += (1 << (SHIFT - 1));
- y_b = CLAMP (y >> SHIFT, 0, 255);
-
- dest[i] = RGB565 (y_r, y_b, y_g);
- }
-}
-
-void
-vs_image_scale_4tap_RGB565 (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB565 (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB565 (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_RGB565 (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
-
-/* note that src and dest are uint16_t, and thus endian dependent */
-
-#define RGB555_R(x) (((x)&0x7c00)>>8 | ((x)&0x7c00)>>13)
-#define RGB555_G(x) (((x)&0x03e0)>>3 | ((x)&0x03e0)>>9)
-#define RGB555_B(x) (((x)&0x001f)<<3 | ((x)&0x001f)>>2)
-
-#define RGB555(r,g,b) \
- ((((r)<<7)&0x7c00) | (((g)<<2)&0x03e0) | (((b)>>3)&0x001f))
-
-void
-vs_scanline_resample_4tap_RGB555 (uint8_t * dest_u8, uint8_t * src_u8,
- int n, int src_width, int *xacc, int increment)
-{
- int i;
- int j;
- int acc;
- int x;
- int y, y_r, y_b, y_g;
- uint16_t *dest = (uint16_t *) dest_u8;
- uint16_t *src = (uint16_t *) src_u8;
-
- acc = *xacc;
- for (i = 0; i < n; i++) {
- j = acc >> 16;
- x = acc & 0xffff >> 8;
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB555_R (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB555_R (src[j]);
- y += vs_4tap_taps[x][2] * RGB555_R (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB555_R (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB555_R (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB555_R (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB555_R (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB555_R (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_r = CLAMP (y >> SHIFT, 0, 255);
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB555_G (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB555_G (src[j]);
- y += vs_4tap_taps[x][2] * RGB555_G (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB555_G (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB555_G (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB555_G (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB555_G (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB555_G (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_g = CLAMP (y >> SHIFT, 0, 255);
-
- if (j - 1 >= 0 && j + 2 < src_width) {
- y = vs_4tap_taps[x][0] * RGB555_B (src[MAX ((j - 1), 0)]);
- y += vs_4tap_taps[x][1] * RGB555_B (src[j]);
- y += vs_4tap_taps[x][2] * RGB555_B (src[(j + 1)]);
- y += vs_4tap_taps[x][3] * RGB555_B (src[(j + 2)]);
- } else {
- y = vs_4tap_taps[x][0] * RGB555_B (src[CLAMP ((j - 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][1] * RGB555_B (src[CLAMP (j, 0, src_width - 1)]);
- y += vs_4tap_taps[x][2] * RGB555_B (src[CLAMP ((j + 1), 0,
- src_width - 1)]);
- y += vs_4tap_taps[x][3] * RGB555_B (src[CLAMP ((j + 2), 0,
- src_width - 1)]);
- }
- y += (1 << (SHIFT - 1));
- y_b = CLAMP (y >> SHIFT, 0, 255);
-
- dest[i] = RGB555 (y_r, y_b, y_g);
- acc += increment;
- }
- *xacc = acc;
-}
-
-void
-vs_scanline_merge_4tap_RGB555 (uint8_t * dest_u8, uint8_t * src1_u8,
- uint8_t * src2_u8, uint8_t * src3_u8, uint8_t * src4_u8, int n, int acc)
-{
- int i;
- int y, y_r, y_b, y_g;
- int a, b, c, d;
- uint16_t *dest = (uint16_t *) dest_u8;
- uint16_t *src1 = (uint16_t *) src1_u8;
- uint16_t *src2 = (uint16_t *) src2_u8;
- uint16_t *src3 = (uint16_t *) src3_u8;
- uint16_t *src4 = (uint16_t *) src4_u8;
-
- acc = (acc >> 8) & 0xff;
- a = vs_4tap_taps[acc][0];
- b = vs_4tap_taps[acc][1];
- c = vs_4tap_taps[acc][2];
- d = vs_4tap_taps[acc][3];
-
- for (i = 0; i < n; i++) {
- y = a * RGB555_R (src1[i]);
- y += b * RGB555_R (src2[i]);
- y += c * RGB555_R (src3[i]);
- y += d * RGB555_R (src4[i]);
- y += (1 << (SHIFT - 1));
- y_r = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * RGB555_G (src1[i]);
- y += b * RGB555_G (src2[i]);
- y += c * RGB555_G (src3[i]);
- y += d * RGB555_G (src4[i]);
- y += (1 << (SHIFT - 1));
- y_g = CLAMP (y >> SHIFT, 0, 255);
-
- y = a * RGB555_B (src1[i]);
- y += b * RGB555_B (src2[i]);
- y += c * RGB555_B (src3[i]);
- y += d * RGB555_B (src4[i]);
- y += (1 << (SHIFT - 1));
- y_b = CLAMP (y >> SHIFT, 0, 255);
-
- dest[i] = RGB555 (y_r, y_b, y_g);
- }
-}
-
-void
-vs_image_scale_4tap_RGB555 (const VSImage * dest, const VSImage * src,
- uint8_t * tmpbuf)
-{
- int yacc;
- int y_increment;
- int x_increment;
- int i;
- int j;
- int xacc;
- int k;
-
- if (dest->height == 1)
- y_increment = 0;
- else
- y_increment = ((src->height - 1) << 16) / (dest->height - 1);
-
- if (dest->width == 1)
- x_increment = 0;
- else
- x_increment = ((src->width - 1) << 16) / (dest->width - 1);
-
- k = 0;
- for (i = 0; i < 4; i++) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB555 (tmpbuf + i * dest->stride,
- src->pixels + i * src->stride, dest->width, src->width,
- &xacc, x_increment);
- }
-
- yacc = 0;
- for (i = 0; i < dest->height; i++) {
- uint8_t *t0, *t1, *t2, *t3;
-
- j = yacc >> 16;
-
- while (j > k) {
- k++;
- if (k + 3 < src->height) {
- xacc = 0;
- vs_scanline_resample_4tap_RGB555 (tmpbuf + ((k + 3) & 3) * dest->stride,
- src->pixels + (k + 3) * src->stride,
- dest->width, src->width, &xacc, x_increment);
- }
- }
-
- t0 = tmpbuf + (CLAMP (j - 1, 0, src->height - 1) & 3) * dest->stride;
- t1 = tmpbuf + (CLAMP (j, 0, src->height - 1) & 3) * dest->stride;
- t2 = tmpbuf + (CLAMP (j + 1, 0, src->height - 1) & 3) * dest->stride;
- t3 = tmpbuf + (CLAMP (j + 2, 0, src->height - 1) & 3) * dest->stride;
- vs_scanline_merge_4tap_RGB555 (dest->pixels + i * dest->stride,
- t0, t1, t2, t3, dest->width, yacc & 0xffff);
-
- yacc += y_increment;
- }
-}
generated by cgit (git 2.34.1) at 2025-05-09 19:45:07 +0000