diff options
| -rw-r--r-- | video/out/opengl/video_shaders.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/video/out/opengl/video_shaders.c b/video/out/opengl/video_shaders.c index d0e3eaff07..4708187580 100644 --- a/video/out/opengl/video_shaders.c +++ b/video/out/opengl/video_shaders.c @@ -537,12 +537,7 @@ void pass_ootf(struct gl_shader_cache *sc, enum mp_csp_light light, float peak) GLSLF("color.rgb *= vec3(1.0/%f);\n", peak); } -// Inverse of the function pass_ootf, for completeness' sake. Note that the -// inverse OOTF for MP_CSP_LIGHT_SCENE_HLG has no analytical solution and is -// therefore unimplemented. Care must be used to never call this function -// in that way.(In principle, a iterative algorithm can approach -// the solution numerically, but this is tricky and we don't really need it -// since mpv currently only supports outputting display-referred light) +// Inverse of the function pass_ootf, for completeness' sake. void pass_inverse_ootf(struct gl_shader_cache *sc, enum mp_csp_light light, float peak) { if (light == MP_CSP_LIGHT_DISPLAY) @@ -554,8 +549,8 @@ void pass_inverse_ootf(struct gl_shader_cache *sc, enum mp_csp_light light, floa switch (light) { case MP_CSP_LIGHT_SCENE_HLG: - // Has no analytical solution - abort(); + GLSLF("color.rgb *= vec3(1.0/%f);\n", (1000 / MP_REF_WHITE) / pow(12, 1.2)); + GLSL(color.rgb *= vec3(pow(dot(src_luma, color.rgb), 0.2/1.2));) break; case MP_CSP_LIGHT_SCENE_709_1886: GLSL(color.rgb = pow(color.rgb, vec3(1.0/2.4));) |