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GL: compute coeffs dynamically

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This commit is contained in:
Martin Pulec
2024-10-08 15:14:13 +02:00
parent 3f813d5a2d
commit 5daca13530
4 changed files with 21 additions and 8 deletions
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6
src/color.c
View File

@@ -150,3 +150,9 @@ get_default_cs()
return get_commandline_param("color-601") != NULL ? CS_601_LIM
: CS_709_LIM;
}
struct color_coeffs
compute_color_coeffs(double kr, double kb, int ycbcr_bit_depth)
{
return (struct color_coeffs) COEFFS(ycbcr_bit_depth, kr, kb);
}

4
src/color.h
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@@ -176,7 +176,9 @@ struct color_coeffs {
};
const struct color_coeffs *get_color_coeffs(enum colorspace cs,
int ycbcr_bit_depth);
enum colorspace get_default_cs(void);
struct color_coeffs compute_color_coeffs(double kr, double kb,
int ycbcr_bit_depth);
enum colorspace get_default_cs(void);
#ifdef __cplusplus
} // extern "C"

8
src/video_display/gl.cpp
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@@ -1533,8 +1533,12 @@ static GLuint gl_substitute_compile_link(const char *vprogram, const char *fprog
double kr = cs_coeffs[2 * index];
double kb = cs_coeffs[2 * index + 1];
const char *placeholders[] = { "Y_SCALED_PLACEHOLDER", "R_CR_PLACEHOLDER", "G_CB_PLACEHOLDER", "G_CR_PLACEHOLDER", "B_CB_PLACEHOLDER" };
double values[] = { Y_LIMIT_INV(8), R_CR(8,kr,kb), G_CB(8,kr,kb), G_CR(8,kr,kb), B_CB(8,kr,kb)};
const struct color_coeffs cfs = compute_color_coeffs(kr, kb, 8);
const double values[] = { (double) cfs.y_scale / (1 << COMP_BASE),
(double) cfs.r_cr / (1 << COMP_BASE),
(double) cfs.g_cb / (1 << COMP_BASE),
(double) cfs.g_cr / (1 << COMP_BASE),
(double) cfs.b_cb / (1 << COMP_BASE) };
for (size_t i = 0; i < sizeof placeholders / sizeof placeholders[0]; ++i) {
char *tok = fp;
while ((tok = strstr(fp, placeholders[i])) != nullptr) {

11
src/video_display/opengl_conversions.cpp
View File

@@ -112,15 +112,16 @@ static void load_yuv_coefficients(GlProgram& program){
glUseProgram(program.get());
GLuint loc = glGetUniformLocation(program.get(), "luma_scale");
glUniform1f(loc, Y_LIMIT_INV(8));
const struct color_coeffs cfs = compute_color_coeffs(kr, kb, 8);
glUniform1f(loc, (double) cfs.y_scale / (1 << COMP_BASE));
loc = glGetUniformLocation(program.get(), "r_cr");
glUniform1f(loc, R_CR(8, kr, kb));
glUniform1f(loc, (double) cfs.r_cr / (1 << COMP_BASE));
loc = glGetUniformLocation(program.get(), "g_cr");
glUniform1f(loc, G_CR(8, kr, kb));
glUniform1f(loc, (double) cfs.g_cb / (1 << COMP_BASE));
loc = glGetUniformLocation(program.get(), "g_cb");
glUniform1f(loc, G_CB(8, kr, kb));
glUniform1f(loc, (double) cfs.g_cr / (1 << COMP_BASE));
loc = glGetUniformLocation(program.get(), "b_cb");
glUniform1f(loc, B_CB(8, kr, kb));
glUniform1f(loc, (double) cfs.b_cb / (1 << COMP_BASE));
}
class Rendering_convertor : public Frame_convertor{