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videoscale: fix 4tap for RGB15 and RGB16

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Fix component ordering, it's wrong in both the scanline and merge
function so it cancels eachother out and isn't really a except for
loss of precision of the green component.
Fix calculation of the filter weight
This commit is contained in:
Wim Taymans 2013-09-12 12:23:35 +02:00
parent 1ede455199
commit 58e6f33e35
1 changed files with 6 additions and 6 deletions
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12
gst/videoscale/vs_4tap.c
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@ -1028,7 +1028,7 @@ vs_scanline_resample_4tap_RGB565 (uint8_t * dest_u8, uint8_t * src_u8,
acc = *xacc;
for (i = 0; i < n; i++) {
j = acc >> 16;
x = acc & 0xffff >> 8;
x = (acc & 0xffff) >> 8;
if (j - 1 >= 0 && j + 2 < src_width) {
y = vs_4tap_taps[x][0] * RGB565_R (src[(j - 1)]);
@ -1081,7 +1081,7 @@ vs_scanline_resample_4tap_RGB565 (uint8_t * dest_u8, uint8_t * src_u8,
y += (1 << (SHIFT - 1));
y_b = CLAMP (y >> SHIFT, 0, 255);
dest[i] = RGB565 (y_r, y_b, y_g);
dest[i] = RGB565 (y_r, y_g, y_b);
acc += increment;
}
*xacc = acc;
@ -1128,7 +1128,7 @@ vs_scanline_merge_4tap_RGB565 (uint8_t * dest_u8, uint8_t * src1_u8,
y += (1 << (SHIFT - 1));
y_b = CLAMP (y >> SHIFT, 0, 255);
dest[i] = RGB565 (y_r, y_b, y_g);
dest[i] = RGB565 (y_r, y_g, y_b);
}
}
@ -1213,7 +1213,7 @@ vs_scanline_resample_4tap_RGB555 (uint8_t * dest_u8, uint8_t * src_u8,
acc = *xacc;
for (i = 0; i < n; i++) {
j = acc >> 16;
x = acc & 0xffff >> 8;
x = (acc & 0xffff) >> 8;
if (j - 1 >= 0 && j + 2 < src_width) {
y = vs_4tap_taps[x][0] * RGB555_R (src[(j - 1)]);
@ -1266,7 +1266,7 @@ vs_scanline_resample_4tap_RGB555 (uint8_t * dest_u8, uint8_t * src_u8,
y += (1 << (SHIFT - 1));
y_b = CLAMP (y >> SHIFT, 0, 255);
dest[i] = RGB555 (y_r, y_b, y_g);
dest[i] = RGB555 (y_r, y_g, y_b);
acc += increment;
}
*xacc = acc;
@ -1313,7 +1313,7 @@ vs_scanline_merge_4tap_RGB555 (uint8_t * dest_u8, uint8_t * src1_u8,
y += (1 << (SHIFT - 1));
y_b = CLAMP (y >> SHIFT, 0, 255);
dest[i] = RGB555 (y_r, y_b, y_g);
dest[i] = RGB555 (y_r, y_g, y_b);
}
}