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do avg and lerp in linear rgb space

master
Ahmet Inan 2013-12-15 14:41:51 +01:00
rodzic 8448764aae
commit 8b7c2d150c
1 zmienionych plików z 27 dodań i 27 usunięć
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54
encode.c
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@ -84,15 +84,15 @@ void y_scan(int y)
int x1 = fclampf(x0 + 1, 0.0, 319.0);
int off0 = 3 * y * img->width + 3 * x0;
int off1 = 3 * y * img->width + 3 * x1;
uint8_t R0 = img->pixel[off0 + 0];
uint8_t G0 = img->pixel[off0 + 1];
uint8_t B0 = img->pixel[off0 + 2];
uint8_t R1 = img->pixel[off1 + 0];
uint8_t G1 = img->pixel[off1 + 1];
uint8_t B1 = img->pixel[off1 + 2];
uint8_t R = flerpf(R0, R1, xf - (float)x0);
uint8_t G = flerpf(G0, G1, xf - (float)x0);
uint8_t B = flerpf(B0, B1, xf - (float)x0);
float R0 = srgb_linear(img->pixel[off0 + 0]);
float G0 = srgb_linear(img->pixel[off0 + 1]);
float B0 = srgb_linear(img->pixel[off0 + 2]);
float R1 = srgb_linear(img->pixel[off1 + 0]);
float G1 = srgb_linear(img->pixel[off1 + 1]);
float B1 = srgb_linear(img->pixel[off1 + 2]);
uint8_t R = linear_srgb(flerpf(R0, R1, xf - (float)x0));
uint8_t G = linear_srgb(flerpf(G0, G1, xf - (float)x0));
uint8_t B = linear_srgb(flerpf(B0, B1, xf - (float)x0));
add_freq(1500.0 + 800.0 * Y_RGB(R, G, B) / 255.0);
}
}
@ -107,15 +107,15 @@ void v_scan(int y)
int evn1 = 3 * y * img->width + 6 * x1;
int odd0 = 3 * (y + 1) * img->width + 6 * x0;
int odd1 = 3 * (y + 1) * img->width + 6 * x1;
uint8_t R0 = (img->pixel[evn0 + 0] + img->pixel[odd0 + 0] + img->pixel[evn0 + 3] + img->pixel[odd0 + 3]) / 4;
uint8_t G0 = (img->pixel[evn0 + 1] + img->pixel[odd0 + 1] + img->pixel[evn0 + 4] + img->pixel[odd0 + 4]) / 4;
uint8_t B0 = (img->pixel[evn0 + 2] + img->pixel[odd0 + 2] + img->pixel[evn0 + 5] + img->pixel[odd0 + 5]) / 4;
uint8_t R1 = (img->pixel[evn1 + 0] + img->pixel[odd1 + 0] + img->pixel[evn1 + 3] + img->pixel[odd1 + 3]) / 4;
uint8_t G1 = (img->pixel[evn1 + 1] + img->pixel[odd1 + 1] + img->pixel[evn1 + 4] + img->pixel[odd1 + 4]) / 4;
uint8_t B1 = (img->pixel[evn1 + 2] + img->pixel[odd1 + 2] + img->pixel[evn1 + 5] + img->pixel[odd1 + 5]) / 4;
uint8_t R = flerpf(R0, R1, xf - (float)x0);
uint8_t G = flerpf(G0, G1, xf - (float)x0);
uint8_t B = flerpf(B0, B1, xf - (float)x0);
float R0 = (srgb_linear(img->pixel[evn0 + 0]) + srgb_linear(img->pixel[odd0 + 0]) + srgb_linear(img->pixel[evn0 + 3]) + srgb_linear(img->pixel[odd0 + 3])) / 4;
float G0 = (srgb_linear(img->pixel[evn0 + 1]) + srgb_linear(img->pixel[odd0 + 1]) + srgb_linear(img->pixel[evn0 + 4]) + srgb_linear(img->pixel[odd0 + 4])) / 4;
float B0 = (srgb_linear(img->pixel[evn0 + 2]) + srgb_linear(img->pixel[odd0 + 2]) + srgb_linear(img->pixel[evn0 + 5]) + srgb_linear(img->pixel[odd0 + 5])) / 4;
float R1 = (srgb_linear(img->pixel[evn1 + 0]) + srgb_linear(img->pixel[odd1 + 0]) + srgb_linear(img->pixel[evn1 + 3]) + srgb_linear(img->pixel[odd1 + 3])) / 4;
float G1 = (srgb_linear(img->pixel[evn1 + 1]) + srgb_linear(img->pixel[odd1 + 1]) + srgb_linear(img->pixel[evn1 + 4]) + srgb_linear(img->pixel[odd1 + 4])) / 4;
float B1 = (srgb_linear(img->pixel[evn1 + 2]) + srgb_linear(img->pixel[odd1 + 2]) + srgb_linear(img->pixel[evn1 + 5]) + srgb_linear(img->pixel[odd1 + 5])) / 4;
uint8_t R = linear_srgb(flerpf(R0, R1, xf - (float)x0));
uint8_t G = linear_srgb(flerpf(G0, G1, xf - (float)x0));
uint8_t B = linear_srgb(flerpf(B0, B1, xf - (float)x0));
add_freq(1500.0 + 800.0 * V_RGB(R, G, B) / 255.0);
}
}
@ -129,15 +129,15 @@ void u_scan(int y)
int evn1 = 3 * (y - 1) * img->width + 6 * x1;
int odd0 = 3 * y * img->width + 6 * x0;
int odd1 = 3 * y * img->width + 6 * x1;
uint8_t R0 = (img->pixel[evn0 + 0] + img->pixel[odd0 + 0] + img->pixel[evn0 + 3] + img->pixel[odd0 + 3]) / 4;
uint8_t G0 = (img->pixel[evn0 + 1] + img->pixel[odd0 + 1] + img->pixel[evn0 + 4] + img->pixel[odd0 + 4]) / 4;
uint8_t B0 = (img->pixel[evn0 + 2] + img->pixel[odd0 + 2] + img->pixel[evn0 + 5] + img->pixel[odd0 + 5]) / 4;
uint8_t R1 = (img->pixel[evn1 + 0] + img->pixel[odd1 + 0] + img->pixel[evn1 + 3] + img->pixel[odd1 + 3]) / 4;
uint8_t G1 = (img->pixel[evn1 + 1] + img->pixel[odd1 + 1] + img->pixel[evn1 + 4] + img->pixel[odd1 + 4]) / 4;
uint8_t B1 = (img->pixel[evn1 + 2] + img->pixel[odd1 + 2] + img->pixel[evn1 + 5] + img->pixel[odd1 + 5]) / 4;
uint8_t R = flerpf(R0, R1, xf - (float)x0);
uint8_t G = flerpf(G0, G1, xf - (float)x0);
uint8_t B = flerpf(B0, B1, xf - (float)x0);
float R0 = (srgb_linear(img->pixel[evn0 + 0]) + srgb_linear(img->pixel[odd0 + 0]) + srgb_linear(img->pixel[evn0 + 3]) + srgb_linear(img->pixel[odd0 + 3])) / 4;
float G0 = (srgb_linear(img->pixel[evn0 + 1]) + srgb_linear(img->pixel[odd0 + 1]) + srgb_linear(img->pixel[evn0 + 4]) + srgb_linear(img->pixel[odd0 + 4])) / 4;
float B0 = (srgb_linear(img->pixel[evn0 + 2]) + srgb_linear(img->pixel[odd0 + 2]) + srgb_linear(img->pixel[evn0 + 5]) + srgb_linear(img->pixel[odd0 + 5])) / 4;
float R1 = (srgb_linear(img->pixel[evn1 + 0]) + srgb_linear(img->pixel[odd1 + 0]) + srgb_linear(img->pixel[evn1 + 3]) + srgb_linear(img->pixel[odd1 + 3])) / 4;
float G1 = (srgb_linear(img->pixel[evn1 + 1]) + srgb_linear(img->pixel[odd1 + 1]) + srgb_linear(img->pixel[evn1 + 4]) + srgb_linear(img->pixel[odd1 + 4])) / 4;
float B1 = (srgb_linear(img->pixel[evn1 + 2]) + srgb_linear(img->pixel[odd1 + 2]) + srgb_linear(img->pixel[evn1 + 5]) + srgb_linear(img->pixel[odd1 + 5])) / 4;
uint8_t R = linear_srgb(flerpf(R0, R1, xf - (float)x0));
uint8_t G = linear_srgb(flerpf(G0, G1, xf - (float)x0));
uint8_t B = linear_srgb(flerpf(B0, B1, xf - (float)x0));
add_freq(1500.0 + 800.0 * U_RGB(R, G, B) / 255.0);
}
}