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Add screen and multiply in LAB space

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veejay
2023-10-28 19:17:23 +02:00
parent ae9de77e41
commit fe7672633d
1 changed files with 69 additions and 9 deletions
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78
veejay-current/veejay-server/libvje/effects/chromamagick.c
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@@ -38,7 +38,7 @@ vj_effect *chromamagick_init(int w, int h)
ve->parallel = 1;
ve->description = "Chroma Magic";
ve->limits[0][0] = 0;
ve->limits[1][0] = 38;
ve->limits[1][0] = 40;
ve->limits[0][1] = 0;
ve->limits[1][1] = 255;
ve->parallel = 1;
@@ -55,8 +55,11 @@ vj_effect *chromamagick_init(int w, int h)
"Difference Negate", "Additive", "Basecolor", "Freeze", "Unfreeze",
"Hardlight", "Multiply", "Divide", "Subtract", "Add", "Screen",
"Difference", "Softlight", "Dodge", "Reflect", "Difference Replace",
"Darken", "Lighten", "Modulo Add", "Pixel Fuckery", "Quilt",
"Dodge LAB", "Additive LAB" , "Divide LAB", "Freeze LAB", "Unfreeze LAB", "Darken LAB", "Lighten LAB", "Softlight LAB", "Hardlight LAB", "Difference LAB"
"Darken", "Lighten", "Modulo Add", "Pixel Fuckery", "Quilt",
// process in LAB space:
"Dodge LAB", "Additive LAB" , "Divide LAB", "Freeze LAB", "Unfreeze LAB",
"Darken LAB", "Lighten LAB", "Softlight LAB", "Hardlight LAB", "Difference LAB",
"Screen LAB", "Multiply LAB"
);
@@ -480,12 +483,10 @@ static void chromamagic_freeze2(VJFrame *frame, VJFrame *frame2, int op_a) {
#pragma omp simd
for (i = 0; i < len; i++) {
// Convert YUV to LAB for frame 1
L1 = (Y[i] * 100) >> 8;
a1 = (((Cb[i] - 128) * 127) >> 8);
b1 = (((Cr[i] - 128) * 127) >> 8);
// Convert YUV to LAB for frame 2
L2 = (Y2[i] * 100) >> 8;
a2 = (((Cb2[i] - 128) * 127) >> 8);
b2 = (((Cr2[i] - 128) * 127) >> 8);
@@ -494,22 +495,18 @@ static void chromamagic_freeze2(VJFrame *frame, VJFrame *frame2, int op_a) {
a2 = a2 | 1;
b2 = b2 | 1;
// Apply freeze blending operation on L channel
c = L1 - (((op_a - L1) * (op_a - L1)) / L2);
c = CLAMP_LAB(c);
L1 = c;
// Apply freeze blending operation on a channel
c = a1 - (((op_a - a1) * (op_a - a1)) / a2);
c = CLAMP_LAB(c);
a1 = c;
// Apply freeze blending operation on b channel
c = b1 - (((op_a - b1) * (op_a - b1)) / b2);
c = CLAMP_LAB(c);
b1 = c;
// Convert LAB back to YUV for frame 1
Y[i] = (uint8_t)((L1 * 255 + 128) / 100);
Cb[i] = (uint8_t)(a1 + 128);
Cr[i] = (uint8_t)(b1 + 128);
@@ -817,6 +814,34 @@ static void chromamagic_hardlight( VJFrame *frame, VJFrame *frame2, int op_a) {
}
}
static void chromamagic_multiply2(VJFrame *frame, VJFrame *frame2, int op_a) {
unsigned int i;
const int len = frame->len;
uint8_t *Y = frame->data[0];
uint8_t *Cb = frame->data[1];
uint8_t *Cr = frame->data[2];
uint8_t *Y2 = frame2->data[0];
uint8_t *Cb2 = frame2->data[1];
uint8_t *Cr2 = frame2->data[2];
for(i = 0; i < len; i++) {
int L1 = (Y[i] * 100) / 255;
int a1 = ((Cb[i] - 128) * 127) / 255;
int b1 = ((Cr[i] - 128) * 127) / 255;
int L2 = (Y2[i] * 100) / 255;
int a2 = ((Cb2[i] - 128) * 127) / 255;
int b2 = ((Cr2[i] - 128) * 127) / 255;
L1 = (L1 * L2 * 255) / 10000;
a1 = (a1 * a2 * 255) / 16256;
b1 = (b1 * b2 * 255) / 16256;
Y[i] = (uint8_t)(L1);
Cb[i] = (uint8_t)(a1 + 128);
Cr[i] = (uint8_t)(b1 + 128);
}
}
static void chromamagic_multiply( VJFrame *frame, VJFrame *frame2, int op_a ) {
@@ -987,6 +1012,35 @@ static void chromamagic_add(VJFrame *frame, VJFrame *frame2, int op_a) {
}
}
static void chromamagic_screen2(VJFrame *frame, VJFrame *frame2, int op_a) {
unsigned int i;
const int len = frame->len;
uint8_t *Y = frame->data[0];
uint8_t *Cb = frame->data[1];
uint8_t *Cr = frame->data[2];
uint8_t *Y2 = frame2->data[0];
uint8_t *Cb2 = frame2->data[1];
uint8_t *Cr2 = frame2->data[2];
for(i = 0; i < len; i++) {
int inverted_Y = 255 - ((255 - Y[i]) * 255) / 255;
int a1 = ((Cb[i] - 128) * 127) / 256;
int b1 = ((Cr[i] - 128) * 127) / 256;
int inverted_Y2 = 255 - ((255 - Y2[i]) * 255) / 255;
int a2 = ((Cb2[i] - 128) * 127) / 256;
int b2 = ((Cr2[i] - 128) * 127) / 256;
int blended_Y = (inverted_Y * (256 - op_a) + inverted_Y2 * op_a) / 256;
int blended_a = (a1 * (256 - op_a) + a2 * op_a) / 256;
int blended_b = (b1 * (256 - op_a) + b2 * op_a) / 256;
Y[i] = (uint8_t)((255 - blended_Y) + 0.5);
Cb[i] = (uint8_t)(blended_a + 128);
Cr[i] = (uint8_t)(blended_b + 128);
}
}
static void chromamagic_screen(VJFrame *frame, VJFrame *frame2, int op_a) {
unsigned int i;
const int len = frame->len;
@@ -1580,6 +1634,12 @@ void chromamagick_apply(void *ptr, VJFrame *frame, VJFrame *frame2, int *args) {
case 38:
chromamagic_difference2(frame,frame2,op_a);
break;
case 39:
chromamagic_screen2(frame,frame2,op_a);
break;
case 40:
chromamagic_multiply2(frame,frame2,op_a);
break;
}
}