/usr/share/movit/ycbcr_input.frag is in libmovit4 1.3.1-1.
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 | // Implicit uniforms:
// uniform sampler2D PREFIX(tex_y);
// uniform sampler2D PREFIX(tex_cbcr); // If CB_CR_SAME_TEXTURE.
// uniform sampler2D PREFIX(tex_cb); // If not CB_CR_SAME_TEXTURE.
// uniform sampler2D PREFIX(tex_cr); // If not CB_CR_SAME_TEXTURE.
vec4 FUNCNAME(vec2 tc) {
// OpenGL's origin is bottom-left, but most graphics software assumes
// a top-left origin. Thus, for inputs that come from the user,
// we flip the y coordinate.
tc.y = 1.0 - tc.y;
vec3 ycbcr;
ycbcr.x = tex2D(PREFIX(tex_y), tc).x;
#if CB_CR_SAME_TEXTURE
#if CB_CR_OFFSETS_EQUAL
ycbcr.yz = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).xy;
#else
ycbcr.y = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).x;
ycbcr.z = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cr_offset)).x;
#endif
#else
ycbcr.y = tex2D(PREFIX(tex_cb), tc + PREFIX(cb_offset)).x;
ycbcr.z = tex2D(PREFIX(tex_cr), tc + PREFIX(cr_offset)).x;
#endif
ycbcr -= PREFIX(offset);
vec4 rgba;
rgba.rgb = PREFIX(inv_ycbcr_matrix) * ycbcr;
rgba.a = 1.0;
return rgba;
}
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