--- /dev/null
+/*
+ * 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 <gst/math-compat.h>
+
+#define SHIFT 10
+
+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 + CLAMP (i, 0, src->height - 1) * 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 + CLAMP (i, 0, src->height - 1) * 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), 0, src_width - 1) * 4 + off];
+ y += vs_4tap_taps[x][1] *
+ src[CLAMP ((j + 0), 0, src_width - 1) * 4 + off];
+ y += vs_4tap_taps[x][2] *
+ src[CLAMP ((j + 1), 0, src_width - 1) * 4 + off];
+ y += vs_4tap_taps[x][3] *
+ src[CLAMP ((j + 2), 0, src_width - 1) * 4 + 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 + CLAMP (i, 0, src->height) * 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 + CLAMP (i, 0, src->height - 1) * 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 + CLAMP (i, 0, src->height - 1) * 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 + CLAMP (i, 0, src->height - 1) * 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 + CLAMP (i, 0, src->height - 1) * 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 + CLAMP (i, 0, src->height - 1) * 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;
+ }
+}
+
+void
+vs_scanline_resample_4tap_AYUV64 (uint16_t * dest, uint16_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_AYUV64 (uint16_t * dest, uint16_t * src1,
+ uint16_t * src2, uint16_t * src3, uint16_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, 65535);
+ }
+ }
+}
+
+void
+vs_image_scale_4tap_AYUV64 (const VSImage * dest, const VSImage * src,
+ uint8_t * tmpbuf8)
+{
+ int yacc;
+ int y_increment;
+ int x_increment;
+ int i;
+ int j;
+ int xacc;
+ int k;
+ guint16 *tmpbuf = (guint16 *) tmpbuf8;
+
+ 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_AYUV64 ((guint16 *) (tmpbuf + i * dest->stride),
+ (guint16 *) (src->pixels + CLAMP (i, 0, src->height - 1) * src->stride),
+ dest->width, src->width, &xacc, x_increment);
+ }
+
+ yacc = 0;
+ for (i = 0; i < dest->height; i++) {
+ uint16_t *t0, *t1, *t2, *t3;
+
+ j = yacc >> 16;
+
+ while (j > k) {
+ k++;
+ if (k + 3 < src->height) {
+ xacc = 0;
+ vs_scanline_resample_4tap_AYUV64 ((guint16 *) (tmpbuf + ((k +
+ 3) & 3) * dest->stride),
+ (guint16 *) (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_AYUV64 ((guint16 *) (dest->pixels +
+ i * dest->stride), t0, t1, t2, t3, dest->width, yacc & 0xffff);
+
+ yacc += y_increment;
+ }
+}
projects / mafwsubrenderer / blobdiff