avfilter/avf_showspectrum: add yet another color map

Signed-off-by: Paul B Mahol <onemda@gmail.com>

doc/filters.texi

@@ -14625,6 +14625,8 @@ each channel is displayed using the nebulae color scheme
 each channel is displayed using the fire color scheme
 @item fiery
 each channel is displayed using the fiery color scheme
+@item fruit
+each channel is displayed using the fruit color scheme
 @end table
 
 Default value is @samp{channel}.
@@ -14758,6 +14760,8 @@ each channel is displayed using the nebulae color scheme
 each channel is displayed using the fire color scheme
 @item fiery
 each channel is displayed using the fiery color scheme
+@item fruit
+each channel is displayed using the fruit color scheme
 @end table
 Default value is @samp{intensity}.
 

libavfilter/avf_showspectrum.c

@@ -41,7 +41,7 @@
 
 enum DisplayMode  { COMBINED, SEPARATE, NB_MODES };
 enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
-enum ColorMode    { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, NB_CLMODES };
+enum ColorMode    { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, NB_CLMODES };
 enum SlideMode    { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
 enum Orientation  { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
 
@@ -98,6 +98,7 @@ static const AVOption showspectrum_options[] = {
         { "nebulae",   "nebulae based coloring",          0, AV_OPT_TYPE_CONST, {.i64=NEBULAE},   0, 0, FLAGS, "color" },
         { "fire",      "fire based coloring",             0, AV_OPT_TYPE_CONST, {.i64=FIRE},      0, 0, FLAGS, "color" },
         { "fiery",     "fiery based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FIERY},     0, 0, FLAGS, "color" },
+        { "fruit",     "fruit based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FRUIT},     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" },
@@ -189,6 +190,15 @@ static const struct ColorTable {
     { 0.77,           193/256.,      (40-128)/256.,      (155-128)/256. },
     { 0.87,           221/256.,     (101-128)/256.,      (134-128)/256. },
     {    1,                  1,                  0,                   0 }},
+    [FRUIT] = {
+    {    0,                  0,                  0,                   0 },
+    { 0.20,            29/256.,     (136-128)/256.,      (119-128)/256. },
+    { 0.30,            60/256.,     (119-128)/256.,       (90-128)/256. },
+    { 0.40,            85/256.,      (91-128)/256.,       (85-128)/256. },
+    { 0.50,           116/256.,      (70-128)/256.,      (105-128)/256. },
+    { 0.60,           151/256.,      (50-128)/256.,      (146-128)/256. },
+    { 0.70,           191/256.,      (63-128)/256.,      (178-128)/256. },
+    {    1,            98/256.,      (80-128)/256.,      (221-128)/256. }},
 };
 
 static av_cold void uninit(AVFilterContext *ctx)
@@ -523,6 +533,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
             case NEBULAE:
             case FIRE:
             case FIERY:
+            case FRUIT:
             case INTENSITY:
                 uf = yf;
                 vf = yf;
@@ -790,6 +801,7 @@ static const AVOption showspectrumpic_options[] = {
         { "nebulae",   "nebulae based coloring",          0, AV_OPT_TYPE_CONST, {.i64=NEBULAE},   0, 0, FLAGS, "color" },
         { "fire",      "fire based coloring",             0, AV_OPT_TYPE_CONST, {.i64=FIRE},      0, 0, FLAGS, "color" },
         { "fiery",     "fiery based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FIERY},     0, 0, FLAGS, "color" },
+        { "fruit",     "fruit based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FRUIT},     0, 0, FLAGS, "color" },
     { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, 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" },