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avfilter/vf_pseudocolor: add opacity option

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This commit is contained in:
Paul B Mahol 2021-02-11 13:34:15 +01:00
parent ba2cebb49c
commit 2859c30cd9
2 changed files with 40 additions and 17 deletions
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11
doc/filters.texi
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@ -16449,10 +16449,10 @@ set pixel third component expression
@item c3
set pixel fourth component expression, corresponds to the alpha component
@item i
@item index, i
set component to use as base for altering colors
@item p
@item preset, p
Pick one of built-in LUTs. By default is set to none.
Available LUTs:
@ -16467,10 +16467,13 @@ Available LUTs:
@item range2
@end table
@item opacity
Set opacity of output colors. Allowed range is from 0 to 1.
Default value is set to 1.
@end table
Each of them specifies the expression to use for computing the lookup table for
the corresponding pixel component values.
Each of the expression options specifies the expression to use for computing
the lookup table for the corresponding pixel component values.
The expressions can contain the following constants and functions:

46
libavfilter/vf_pseudocolor.c
View File

@ -156,6 +156,7 @@ static const Preset presets[] =
typedef struct PseudoColorContext {
const AVClass *class;
int preset;
float opacity;
int max;
int index;
int nb_planes;
@ -173,7 +174,8 @@ typedef struct PseudoColorContext {
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut);
float *lut,
float opacity);
} PseudoColorContext;
#define OFFSET(x) offsetof(PseudoColorContext, x)
@ -184,7 +186,9 @@ static const AVOption pseudocolor_options[] = {
{ "c1", "set component #1 expression", OFFSET(comp_expr_str[1]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
{ "index", "set component as base", OFFSET(index), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, .flags = FLAGS },
{ "i", "set component as base", OFFSET(index), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, .flags = FLAGS },
{ "preset", "set preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=-1},-1, NB_PRESETS-1, .flags = FLAGS, "preset" },
{ "p", "set preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=-1},-1, NB_PRESETS-1, .flags = FLAGS, "preset" },
{ "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, .flags = FLAGS, "preset" },
{ "magma", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_MAGMA}, .flags = FLAGS, "preset" },
@ -195,6 +199,7 @@ static const AVOption pseudocolor_options[] = {
{ "cividis", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_CIVIDIS}, .flags = FLAGS, "preset" },
{ "range1", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_RANGE1}, .flags = FLAGS, "preset" },
{ "range2", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PRESET_RANGE2}, .flags = FLAGS, "preset" },
{ "opacity", "set pseudocolor opacity",OFFSET(opacity), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 1, .flags = FLAGS },
{ NULL }
};
@ -235,9 +240,14 @@ static int query_formats(AVFilterContext *ctx)
return ff_set_common_formats(ctx, fmts_list);
}
static inline float lerpf(float v0, float v1, float f)
{
return v0 + (v1 - v0) * f;
}
#define PCLIP(v, max, dst, src, x) \
if (v >= 0 && v <= max) { \
dst[x] = v; \
dst[x] = lerpf(src[x], v, opacity);\
} else { \
dst[x] = src[x]; \
}
@ -249,7 +259,8 @@ static void pseudocolor_filter(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
int x, y;
@ -272,7 +283,8 @@ static void pseudocolor_filter_11(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
int x, y;
@ -294,7 +306,8 @@ static void pseudocolor_filter_11d(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
int x, y;
@ -316,7 +329,8 @@ static void pseudocolor_filter_10(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
int x, y;
@ -339,7 +353,8 @@ static void pseudocolor_filter_10d(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
int x, y;
@ -362,7 +377,8 @@ static void pseudocolor_filter_16(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
@ -388,7 +404,8 @@ static void pseudocolor_filter_16_10(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
@ -414,7 +431,8 @@ static void pseudocolor_filter_16_10d(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
@ -440,7 +458,8 @@ static void pseudocolor_filter_16_11(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
@ -469,7 +488,8 @@ static void pseudocolor_filter_16_11d(int max, int width, int height,
ptrdiff_t ilinesize,
ptrdiff_t slinesize,
ptrdiff_t dlinesize,
float *lut)
float *lut,
float opacity)
{
const uint16_t *index = (const uint16_t *)iindex;
const uint16_t *src = (const uint16_t *)ssrc;
@ -785,7 +805,7 @@ static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
s->filter[plane](s->max, s->width[plane], slice_end - slice_start,
index, src, dst, ilinesize, slinesize,
dlinesize, s->lut[plane]);
dlinesize, s->lut[plane], s->opacity);
}
return 0;