avfilter/avf_showspectrum: add green color map

doc/filters.texi

@@ -20640,6 +20640,8 @@ each channel is displayed using the fruit color scheme
 each channel is displayed using the cool color scheme
 @item magma
 each channel is displayed using the magma color scheme
+@item green
+each channel is displayed using the green color scheme
 @end table
 
 Default value is @samp{channel}.
@@ -20797,6 +20799,8 @@ each channel is displayed using the fruit color scheme
 each channel is displayed using the cool color scheme
 @item magma
 each channel is displayed using the magma color scheme
+@item green
+each channel is displayed using the green color scheme
 @end table
 Default value is @samp{intensity}.
 

libavfilter/avf_showspectrum.c

@@ -44,7 +44,7 @@
 enum DisplayMode  { COMBINED, SEPARATE, NB_MODES };
 enum DataMode     { D_MAGNITUDE, D_PHASE, NB_DMODES };
 enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
-enum ColorMode    { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, MAGMA, NB_CLMODES };
+enum ColorMode    { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, MAGMA, GREEN, NB_CLMODES };
 enum SlideMode    { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
 enum Orientation  { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
 
@@ -114,6 +114,7 @@ static const AVOption showspectrum_options[] = {
         { "fruit",     "fruit based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FRUIT},     0, 0, FLAGS, "color" },
         { "cool",      "cool based coloring",             0, AV_OPT_TYPE_CONST, {.i64=COOL},      0, 0, FLAGS, "color" },
         { "magma",     "magma based coloring",            0, AV_OPT_TYPE_CONST, {.i64=MAGMA},     0, 0, FLAGS, "color" },
+        { "green",     "green based coloring",            0, AV_OPT_TYPE_CONST, {.i64=GREEN},     0, 0, FLAGS, "color" },
     { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
         { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
         { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT},   0, 0, FLAGS, "scale" },
@@ -238,6 +239,10 @@ static const struct ColorTable {
     { 0.64,           128/256.,     (103-128)/256.,      (214-128)/256. },
     { 0.78,           167/256.,      (85-128)/256.,      (174-128)/256. },
     {    1,           205/256.,      (80-128)/256.,      (152-128)/256. }},
+    [GREEN] = {
+    {    0,                  0,                  0,                   0 },
+    {  .75,                 .5,                  0,                 -.5 },
+    {    1,                  1,                  0,                   0 }},
 };
 
 static av_cold void uninit(AVFilterContext *ctx)
@@ -698,6 +703,7 @@ static void color_range(ShowSpectrumContext *s, int ch,
         case FIERY:
         case FRUIT:
         case COOL:
+        case GREEN:
         case MAGMA:
         case INTENSITY:
             *uf = *yf;
@@ -1086,6 +1092,7 @@ static const AVOption showspectrumpic_options[] = {
         { "fruit",     "fruit based coloring",            0, AV_OPT_TYPE_CONST, {.i64=FRUIT},     0, 0, FLAGS, "color" },
         { "cool",      "cool based coloring",             0, AV_OPT_TYPE_CONST, {.i64=COOL},      0, 0, FLAGS, "color" },
         { "magma",     "magma based coloring",            0, AV_OPT_TYPE_CONST, {.i64=MAGMA},     0, 0, FLAGS, "color" },
+        { "green",     "green based coloring",            0, AV_OPT_TYPE_CONST, {.i64=GREEN},     0, 0, FLAGS, "color" },
     { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" },
         { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
         { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT},   0, 0, FLAGS, "scale" },