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avfilter/vf_vibrance: add alternate option

This commit is contained in:
Paul B Mahol 2019-05-05 13:26:24 +02:00
parent 526bc2205b
commit 38baaa1617
2 changed files with 14 additions and 6 deletions
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4
doc/filters.texi
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@ -17984,6 +17984,10 @@ Set the green luma coefficient.
@item blum
Set the blue luma coefficient.
@item alternate
If @code{intensity} is negative and this is set to 1, colors will change,
otherwise colors will be less saturated, more towards gray.
@end table
@anchor{vignette}

16
libavfilter/vf_vibrance.c
View File

@ -31,6 +31,7 @@ typedef struct VibranceContext {
float intensity;
float balance[3];
float lcoeffs[3];
int alternate;
int depth;
@ -54,12 +55,13 @@ static int vibrance_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_
const float bc = s->lcoeffs[1];
const float rc = s->lcoeffs[2];
const float intensity = s->intensity;
const float alternate = s->alternate ? 1.f : -1.f;
const float gintensity = intensity * s->balance[0];
const float bintensity = intensity * s->balance[1];
const float rintensity = intensity * s->balance[2];
const float sgintensity = FFSIGN(intensity);
const float sbintensity = FFSIGN(intensity);
const float srintensity = FFSIGN(intensity);
const float sgintensity = alternate * FFSIGN(gintensity);
const float sbintensity = alternate * FFSIGN(bintensity);
const float srintensity = alternate * FFSIGN(rintensity);
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int glinesize = frame->linesize[0];
@ -112,12 +114,13 @@ static int vibrance_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb
const int width = frame->width;
const int height = frame->height;
const float intensity = s->intensity;
const float alternate = s->alternate ? 1.f : -1.f;
const float gintensity = intensity * s->balance[0];
const float bintensity = intensity * s->balance[1];
const float rintensity = intensity * s->balance[2];
const float sgintensity = FFSIGN(intensity);
const float sbintensity = FFSIGN(intensity);
const float srintensity = FFSIGN(intensity);
const float sgintensity = alternate * FFSIGN(gintensity);
const float sbintensity = alternate * FFSIGN(bintensity);
const float srintensity = alternate * FFSIGN(rintensity);
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int glinesize = frame->linesize[0] / 2;
@ -231,6 +234,7 @@ static const AVOption vibrance_options[] = {
{ "rlum", "set the red luma coefficient", OFFSET(lcoeffs[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.072186}, 0, 1, VF },
{ "glum", "set the green luma coefficient", OFFSET(lcoeffs[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.715158}, 0, 1, VF },
{ "blum", "set the blue luma coefficient", OFFSET(lcoeffs[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.212656}, 0, 1, VF },
{ "alternate", "use alternate colors", OFFSET(alternate), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, VF },
{ NULL }
};