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Code Issues Releases Activity

avfilter/vf_pseudocolor: add four more presets

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This commit is contained in:
Paul B Mahol 2023-07-20 09:37:20 +02:00
parent 44cac1def0
commit 3dc93acc56
2 changed files with 73 additions and 1 deletions
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4
doc/filters.texi
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@ -19711,6 +19711,10 @@ Available LUTs:
@item spectral
@item cool
@item heat
@item fiery
@item blues
@item green
@item helix
@end table
@item opacity

70
libavfilter/vf_pseudocolor.c
View File

@ -70,6 +70,10 @@ enum Curves {
SPECTRAL,
COOL,
HEAT,
FIERY,
BLUES,
GREEN,
HELIX,
NB_CURVES,
};
@ -91,6 +95,10 @@ enum Presets {
PRESET_SPECTRAL,
PRESET_COOL,
PRESET_HEAT,
PRESET_FIERY,
PRESET_BLUES,
PRESET_GREEN,
PRESET_HELIX,
NB_PRESETS,
};
@ -162,6 +170,26 @@ static double heatfunv(double x)
return 0.25 * sin(2.0 * x * M_PI) + 0.5;
}
static double fieryfunu(double x)
{
return 0.75 - 0.25 * cos(2.0 * x * M_PI);
}
static double fieryfunv(double x)
{
return 0.25 + 0.25 * cos(2.0 * x * M_PI);
}
static double helixfunu(double x)
{
return 0.5 + 0.15 * sin(5.0 * x * M_PI + M_PI);
}
static double helixfunv(double x)
{
return 0.5 + 0.15 * cos(6.0 * x * M_PI + M_PI_2);
}
static const Curve curves[] =
{
[MAGMA] = {{
@ -222,6 +250,38 @@ static const Curve curves[] =
.offset = { 0., 0., 0 },
.yuv = 1,
.fun = { heatfunu, limit, heatfunv }, },
[FIERY] = {{
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
},
.offset = { 0., 0., 0 },
.yuv = 1,
.fun = { fieryfunu, limit, fieryfunv }, },
[BLUES] = {{
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
},
.offset = { 0., 0., 0 },
.yuv = 1,
.fun = { fieryfunv, limit, fieryfunu }, },
[GREEN] = {{
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
},
.offset = { 0., 0., 0 },
.yuv = 1,
.fun = { fieryfunv, limit, fieryfunv }, },
[HELIX] = {{
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
{ 0, 0, 0, 0, 0, 0, 1./256, 0 },
},
.offset = { 0., 0., 0 },
.yuv = 1,
.fun = { helixfunu, limit, helixfunv }, },
};
static const Preset presets[] =
@ -242,7 +302,11 @@ static const Preset presets[] =
[PRESET_SOLAR] = { 1, &full_range, &curves[SOLAR], NULL },
[PRESET_SPECTRAL]= { 1, &full_range, &curves[SPECTRAL],NULL },
[PRESET_COOL] = { 1, &full_range, &curves[COOL], NULL },
[PRESET_HEAT]= { 1, &full_range, &curves[HEAT],NULL },
[PRESET_HEAT] = { 1, &full_range, &curves[HEAT], NULL },
[PRESET_FIERY] = { 1, &full_range, &curves[FIERY], NULL },
[PRESET_BLUES] = { 1, &full_range, &curves[BLUES], NULL },
[PRESET_GREEN] = { 1, &full_range, &curves[GREEN], NULL },
[PRESET_HELIX] = { 1, &full_range, &curves[HELIX], NULL },
};
typedef struct PseudoColorContext {
@ -300,6 +364,10 @@ static const AVOption pseudocolor_options[] = {
{ "spectral", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_SPECTRAL},.flags = FLAGS, "preset" },
{ "cool", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_COOL}, .flags = FLAGS, "preset" },
{ "heat", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_HEAT}, .flags = FLAGS, "preset" },
{ "fiery", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_FIERY}, .flags = FLAGS, "preset" },
{ "blues", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_BLUES}, .flags = FLAGS, "preset" },
{ "green", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_GREEN}, .flags = FLAGS, "preset" },
{ "helix", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_HELIX}, .flags = FLAGS, "preset" },
{ "opacity", "set pseudocolor opacity",OFFSET(opacity), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, .flags = FLAGS },
{ NULL }
};