/usr/share/movit/ycbcr_conversion_effect.frag is in libmovit8 1.6.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | // See footer.frag for details about this if statement.
#ifndef YCBCR_ALSO_OUTPUT_RGBA
#define YCBCR_ALSO_OUTPUT_RGBA 0
#endif
uniform sampler2D PREFIX(tex_y);
uniform sampler2D PREFIX(tex_cb);
uniform sampler2D PREFIX(tex_cr);
#if YCBCR_ALSO_OUTPUT_RGBA
vec4[2] FUNCNAME(vec2 tc) {
#else
vec4 FUNCNAME(vec2 tc) {
#endif
vec4 rgba = INPUT(tc);
vec4 ycbcr_a;
ycbcr_a.rgb = PREFIX(ycbcr_matrix) * rgba.rgb + PREFIX(offset);
if (PREFIX(clamp_range)) {
// If we use limited-range Y'CbCr, the card's usual 0–255 clamping
// won't be enough, so we need to clamp ourselves here.
//
// We clamp before dither, which is a bit unfortunate, since
// it means dither can take us out of the clamped range again.
// However, since DitherEffect never adds enough dither to change
// the quantized levels, we will be fine in practice.
ycbcr_a.rgb = clamp(ycbcr_a.rgb, PREFIX(ycbcr_min), PREFIX(ycbcr_max));
}
ycbcr_a.a = rgba.a;
#if YCBCR_ALSO_OUTPUT_RGBA
return vec4[2](ycbcr_a, rgba);
#else
return ycbcr_a;
#endif
}
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