Update mpv config:

mpv/shaders/hdr-toys/transfer-function/pq_inv.glsl

@@ -0,0 +1,40 @@
+// https://ieeexplore.ieee.org/document/7291452
+// https://www.itu.int/rec/R-REC-BT.2100
+
+//!PARAM reference_white
+//!TYPE float
+//!MINIMUM 0.0
+//!MAXIMUM 1000.0
+203.0
+
+//!HOOK OUTPUT
+//!BIND HOOKED
+//!DESC transfer function (pq, inverse)
+
+const float m1 = 2610.0 / 4096.0 / 4.0;
+const float m2 = 2523.0 / 4096.0 * 128.0;
+const float c1 = 3424.0 / 4096.0;
+const float c2 = 2413.0 / 4096.0 * 32.0;
+const float c3 = 2392.0 / 4096.0 * 32.0;
+const float pw = 10000.0;
+
+float pq_eotf(float x) {
+    float t = pow(x, 1.0 / m2);
+    return pow(max(t - c1, 0.0) / (c2 - c3 * t), 1.0 / m1) * pw;
+}
+
+vec3 pq_eotf(vec3 color) {
+    return vec3(
+        pq_eotf(color.r),
+        pq_eotf(color.g),
+        pq_eotf(color.b)
+    );
+}
+
+vec4 hook() {
+    vec4 color = HOOKED_tex(HOOKED_pos);
+
+    color.rgb = pq_eotf(color.rgb) / reference_white;
+
+    return color;
+}