mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 04:31:06 +00:00
videoscale: Implement 4-tap scaling for RGB565 and RGB555
This commit is contained in:
Sebastian Dröge
parent
c1653fc5b0
commit
77795ac240
2 changed files with 383 additions and 0 deletions
|
|
@ -699,3 +699,373 @@ vs_image_scale_4tap_UYVY (const VSImage * dest, const VSImage * src,
|
|||
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)<<3)&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;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -68,6 +68,19 @@ void vs_scanline_merge_4tap_UYVY (uint8_t *dest, uint8_t *src1, uint8_t *src2,
|
|||
void vs_image_scale_4tap_UYVY (const VSImage * dest, const VSImage * src,
|
||||
uint8_t * tmpbuf);
|
||||
|
||||
void vs_scanline_resample_4tap_RGB565 (uint8_t *dest, uint8_t *src,
|
||||
int n, int src_width, int *xacc, int increment);
|
||||
void vs_scanline_merge_4tap_RGB565 (uint8_t *dest, uint8_t *src1, uint8_t *src2,
|
||||
uint8_t *src3, uint8_t *src4, int n, int acc);
|
||||
void vs_image_scale_4tap_RGB565 (const VSImage * dest, const VSImage * src,
|
||||
uint8_t * tmpbuf);
|
||||
|
||||
void vs_scanline_resample_4tap_RGB555 (uint8_t *dest, uint8_t *src,
|
||||
int n, int src_width, int *xacc, int increment);
|
||||
void vs_scanline_merge_4tap_RGB555 (uint8_t *dest, uint8_t *src1, uint8_t *src2,
|
||||
uint8_t *src3, uint8_t *src4, int n, int acc);
|
||||
void vs_image_scale_4tap_RGB555 (const VSImage * dest, const VSImage * src,
|
||||
uint8_t * tmpbuf);
|
||||
|
||||
#endif
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue