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gamma weight patch by (Alexander Stege <mplayer at legale-software dot com>) 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11170 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2003-10-18 23:02:30 +00:00
parent 8812af8057
commit 13f07bfc31
1 changed files with 13 additions and 4 deletions
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17
libmpcodecs/vf_eq2.c
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@ -43,6 +43,7 @@ typedef struct eq2_param_t {
double c;
double b;
double g;
double w;
} eq2_param_t;
typedef struct vf_priv_s {
@ -53,6 +54,7 @@ typedef struct vf_priv_s {
double saturation;
double gamma;
double gamma_weight;
double rgamma;
double ggamma;
double bgamma;
@ -68,8 +70,11 @@ void create_lut (eq2_param_t *par)
{
unsigned i;
double g, v;
double lw, gw;
g = par->g;
gw = par->w;
lw = 1.0 - gw;
if ((g < 0.001) || (g > 1000.0)) {
g = 1.0;
@ -85,7 +90,7 @@ void create_lut (eq2_param_t *par)
par->lut[i] = 0;
}
else {
v = pow (v, g);
v = v*lw + pow(v, g)*gw;
if (v >= 1.0) {
par->lut[i] = 255;
@ -320,6 +325,7 @@ void set_gamma (vf_eq2_t *eq2, double g)
eq2->param[0].g = eq2->gamma * eq2->ggamma;
eq2->param[1].g = sqrt (eq2->bgamma / eq2->ggamma);
eq2->param[2].g = sqrt (eq2->rgamma / eq2->ggamma);
eq2->param[0].w = eq2->param[1].w = eq2->param[2].w = eq2->gamma_weight;
eq2->param[0].lut_clean = 0;
eq2->param[1].lut_clean = 0;
@ -434,7 +440,7 @@ int open (vf_instance_t *vf, char *args)
{
unsigned i;
vf_eq2_t *eq2;
double par[7];
double par[8];
vf->control = control;
vf->query_format = query_format;
@ -461,6 +467,7 @@ int open (vf_instance_t *vf, char *args)
eq2->saturation = 1.0;
eq2->gamma = 1.0;
eq2->gamma_weight = 1.0;
eq2->rgamma = 1.0;
eq2->ggamma = 1.0;
eq2->bgamma = 1.0;
@ -473,11 +480,12 @@ int open (vf_instance_t *vf, char *args)
par[4] = 1.0;
par[5] = 1.0;
par[6] = 1.0;
par[7] = 1.0;
#ifdef USE_SETLOCALE
setlocale (LC_NUMERIC, "C");
#endif
sscanf (args, "%lf:%lf:%lf:%lf:%lf:%lf:%lf",
par, par + 1, par + 2, par + 3, par + 4, par + 5, par + 6
sscanf (args, "%lf:%lf:%lf:%lf:%lf:%lf:%lf:%lf",
par, par + 1, par + 2, par + 3, par + 4, par + 5, par + 6, par + 7
);
#ifdef USE_SETLOCALE
setlocale (LC_NUMERIC, "");
@ -486,6 +494,7 @@ int open (vf_instance_t *vf, char *args)
eq2->rgamma = par[4];
eq2->ggamma = par[5];
eq2->bgamma = par[6];
eq2->gamma_weight = par[7];
set_gamma (eq2, par[0]);
set_contrast (eq2, par[1]);