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videoscale: Don't write to few pixels and don't mix Cr and Cb

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Fixes bug #577054.
This commit is contained in:
Sebastian Dröge 2009-04-02 10:52:06 +02:00
parent d271c8de53
commit db1236505e
1 changed files with 30 additions and 34 deletions
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64
gst/videoscale/vs_4tap.c
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@ -492,7 +492,6 @@ vs_scanline_resample_4tap_YUYV (uint8_t * dest, uint8_t * src,
j = acc >> 17;
x = (acc & 0x1ffff) >> 9;
/* FIXME: Clamping can take U instead of V */
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];
@ -500,33 +499,32 @@ vs_scanline_resample_4tap_YUYV (uint8_t * dest, uint8_t * src,
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,
2 * (src_width - 1) + 1)];
(2 * (src_width - 1) & ~1) + 1)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 1, 1,
2 * (src_width - 1) + 1)];
(2 * (src_width - 1) & ~1) + 1)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 1 + 4, 1,
2 * (src_width - 1) + 1)];
(2 * (src_width - 1) & ~1) + 1)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 1 + 8, 1,
2 * (src_width - 1) + 1)];
(2 * (src_width - 1) & ~1) + 1)];
}
y += (1 << (SHIFT - 1));
dest[i * 4 + 1] = CLAMP (y >> SHIFT, 0, 255);
/* FIXME: Clamping can take U instead of V */
if (2 * i + 1 < n && 2 * (j + 1) < src_width) {
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, 1)];
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, 1,
2 * (src_width - 1) + 1)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 3, 1,
2 * (src_width - 1) + 1)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 3 + 4, 1,
2 * (src_width - 1) + 1)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 3 + 8, 1,
2 * (src_width - 1) + 1)];
y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 3 - 4, 3,
(2 * (src_width - 1) + ~1) + 3)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 3, 3,
(2 * (src_width - 1) + ~1) + 3)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 3 + 4, 3,
(2 * (src_width - 1) + ~1) + 3)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 3 + 8, 3,
(2 * (src_width - 1) + ~1) + 3)];
}
y += (1 << (SHIFT - 1));
dest[i * 4 + 3] = CLAMP (y >> SHIFT, 0, 255);
@ -536,7 +534,7 @@ vs_scanline_resample_4tap_YUYV (uint8_t * dest, uint8_t * src,
j = acc >> 16;
x = (acc & 0xffff) >> 8;
if (2 * i + 1 < n && j < src_width) {
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];
@ -701,7 +699,6 @@ vs_scanline_resample_4tap_UYVY (uint8_t * dest, uint8_t * src,
j = acc >> 17;
x = (acc & 0x1ffff) >> 9;
/* FIXME: Clamping can take U instead of V */
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];
@ -709,33 +706,32 @@ vs_scanline_resample_4tap_UYVY (uint8_t * dest, uint8_t * src,
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,
2 * (src_width - 1) + 0)];
((2 * (src_width - 1) + 0)) & ~1)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 0, 0,
2 * (src_width - 1) + 0)];
(2 * (src_width - 1) + 0) & ~1)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 0 + 4, 0,
2 * (src_width - 1) + 0)];
(2 * (src_width - 1) + 0) & ~1)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 0 + 8, 0,
2 * (src_width - 1) + 0)];
(2 * (src_width - 1) + 0) & ~1)];
}
y += (1 << (SHIFT - 1));
dest[i * 4 + 0] = CLAMP (y >> SHIFT, 0, 255);
/* FIXME: Clamping can take U instead of V */
if (2 * i + 1 < n && 2 * (j + 1) < src_width) {
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, 0)];
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, 0,
2 * (src_width - 1) + 0)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 2, 0,
2 * (src_width - 1) + 0)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 2 + 4, 0,
2 * (src_width - 1) + 0)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 2 + 8, 0,
2 * (src_width - 1) + 0)];
y = vs_4tap_taps[x][0] * src[CLAMP (j * 4 + 2 - 4, 2,
(2 * (src_width - 1) & ~1) + 2)];
y += vs_4tap_taps[x][1] * src[CLAMP (j * 4 + 2, 2,
(2 * (src_width - 1) & ~1) + 2)];
y += vs_4tap_taps[x][2] * src[CLAMP (j * 4 + 2 + 4, 2,
(2 * (src_width - 1) & ~1) + 2)];
y += vs_4tap_taps[x][3] * src[CLAMP (j * 4 + 2 + 8, 2,
(2 * (src_width - 1) & ~1) + 2)];
}
y += (1 << (SHIFT - 1));
dest[i * 4 + 2] = CLAMP (y >> SHIFT, 0, 255);
@ -745,7 +741,7 @@ vs_scanline_resample_4tap_UYVY (uint8_t * dest, uint8_t * src,
j = acc >> 16;
x = (acc & 0xffff) >> 8;
if (2 * i + 1 < n && j < src_width) {
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];