@@ -39,6 +39,7 @@ enum WindowFunc {

     WFUNC_NUTTALL,

     WFUNC_BNUTTALL,

     WFUNC_BHARRIS,

+    WFUNC_TUKEY,

     NB_WFUNC

 };

@@ -107,6 +108,7 @@ static const AVOption firequalizer_options[] = {

         { "nuttall", "nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_NUTTALL }, 0, 0, FLAGS, "wfunc" },

         { "bnuttall", "blackman-nuttall window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BNUTTALL }, 0, 0, FLAGS, "wfunc" },

         { "bharris", "blackman-harris window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_BHARRIS }, 0, 0, FLAGS, "wfunc" },

+        { "tukey", "tukey window", 0, AV_OPT_TYPE_CONST, { .i64 = WFUNC_TUKEY }, 0, 0, FLAGS, "wfunc" },

     { "fixed", "set fixed frame samples", OFFSET(fixed), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },

     { "multi", "set multi channels mode", OFFSET(multi), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },

     { "zero_phase", "set zero phase mode", OFFSET(zero_phase), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },

@@ -385,6 +387,9 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g

             case WFUNC_BHARRIS:

                 win = 0.35875 + 0.48829 * cos(u) + 0.14128 * cos(2*u) + 0.01168 * cos(3*u);

                 break;

+            case WFUNC_TUKEY:

+                win = (u <= 0.5 * M_PI) ? 1.0 : (0.5 + 0.5 * cos(2*u - M_PI));

+                break;

             default:

                 av_assert0(0);

             }