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avfilter/avf_showspectrum: add moreland color map

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-12-30 18:35:17 +01:00
parent 05434b0eea
commit 2893dbfe2c
2 changed files with 16 additions and 4 deletions
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2
doc/filters.texi
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@ -14617,6 +14617,8 @@ each channel is displayed in a separate color
each channel is displayed using the same color scheme
@item rainbow
each channel is displayed using the rainbow color scheme
@item moreland
each channel is displayed using the moreland color scheme
@end table
Default value is @samp{channel}.

18
libavfilter/avf_showspectrum.c
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@ -37,7 +37,7 @@
enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
enum DisplayScale { LINEAR, SQRT, CBRT, LOG, NB_SCALES };
enum ColorMode { CHANNEL, INTENSITY, RAINBOW, NB_CLMODES };
enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NB_CLMODES };
enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
@ -82,7 +82,8 @@ static const AVOption showspectrum_options[] = {
{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, "color" },
{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
@ -134,6 +135,15 @@ static const struct ColorTable {
{ 0.73, 205/256., (19-128)/256., (149-128)/256. },
{ 0.86, 135/256., (83-128)/256., (200-128)/256. },
{ 1, 73/256., (95-128)/256., (225-128)/256. }},
[MORELAND] = {
{ 0, 44/256., (181-128)/256., (112-128)/256. },
{ 0.13, 126/256., (177-128)/256., (106-128)/256. },
{ 0.25, 164/256., (163-128)/256., (109-128)/256. },
{ 0.38, 200/256., (140-128)/256., (120-128)/256. },
{ 0.60, 201/256., (117-128)/256., (141-128)/256. },
{ 0.73, 177/256., (103-128)/256., (165-128)/256. },
{ 0.86, 136/256., (100-128)/256., (183-128)/256. },
{ 1, 68/256., (117-128)/256., (203-128)/256. }},
};
static av_cold void uninit(AVFilterContext *ctx)
@ -381,6 +391,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
yf = 256.0f / s->nb_display_channels;
switch (s->color_mode) {
case RAINBOW:
case MORELAND:
case INTENSITY:
uf = yf;
vf = yf;
@ -442,8 +453,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
av_assert0(0);
}
if (s->color_mode == INTENSITY ||
s->color_mode == RAINBOW) {
if (s->color_mode > CHANNEL) {
const int cm = s->color_mode;
float y, u, v;
int i;