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@bjin
Last active December 14, 2023 23:04
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dynamic stretching filter for mpv, aiming to bring effects similar to GoPro SuperView. use along with '--no-keepaspect'
//!DESC hyperview
//!HOOK MAIN
//!WHEN OUTPUT.width OUTPUT.height / MAIN.width MAIN.height / / 0.667 >
//!WIDTH OUTPUT.width
//!BIND HOOKED
vec4 hook() {
float r = (target_size.x / target_size.y) / (HOOKED_size.x / HOOKED_size.y);
// y = (r - 1) * x^3 + x
float y = (HOOKED_pos.x - 0.5) * 2.0 * r;
float x = y / r;
x -= ((r - 1.0) * x * x * x + x - y) / (3 * (r - 1.0) * x * x + 1.0);
x -= ((r - 1.0) * x * x * x + x - y) / (3 * (r - 1.0) * x * x + 1.0);
x -= ((r - 1.0) * x * x * x + x - y) / (3 * (r - 1.0) * x * x + 1.0);
x -= ((r - 1.0) * x * x * x + x - y) / (3 * (r - 1.0) * x * x + 1.0);
x -= ((r - 1.0) * x * x * x + x - y) / (3 * (r - 1.0) * x * x + 1.0);
return HOOKED_tex(vec2(x / 2.0 + 0.5, HOOKED_pos.y));
}
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