added missing files

core/src/dsp/utils/math.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <math.h>
+
+#define FL_M_PI     3.1415926535f
+
+namespace dsp {
+    namespace math {
+        inline float sinc(float omega, float x, float norm) {
+            return (x == 0.0f) ? 1.0f : (sinf(omega*x)/(norm*x));
+        }
+    }
+}

core/src/dsp/utils/window_functions.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <dsp/types.h>
+
+namespace dsp {
+    namespace window_function {
+        inline float blackman(float n, float N, float alpha = 0.16f) {
+            float a0 = (1.0f-alpha) / 2.0f;
+            float a2 = alpha / 2.0f;
+            return a0 - (0.5f*cosf(2.0f*FL_M_PI*(n/N))) + (a2*cosf(4.0f*FL_M_PI*(n/N)));
+        }
+
+        inline float blackmanThirdOrder(float n, float N, float a0, float a1, float a2, float a3) {
+            return a0 - (a1*cosf(2.0f*FL_M_PI*(n/N))) + (a2*cosf(4.0f*FL_M_PI*(n/N))) - (a3*cosf(6.0f*FL_M_PI*(n/N)));
+        }
+
+        inline float nuttall(float n, float N) {
+            return blackmanThirdOrder(n, N, 0.3635819f, 0.4891775f, 0.1365995f, 0.0106411f);
+        }
+
+        inline float blackmanNuttall(float n, float N) {
+            return blackmanThirdOrder(n, N, 0.3635819f, 0.4891775f, 0.1365995f, 0.0106411f);
+        }
+
+        inline float blackmanHarris(float n, float N) {
+            return blackmanThirdOrder(n, N, 0.35875f, 0.48829f, 0.14128f, 0.01168f);
+        }
+    }
+}

root/res/colormaps/websdr.json

@@ -0,0 +1,11 @@
+{
+    "name": "WebSDR",
+    "author": "Ryzerth",
+    "map": [
+        "#000000",
+        "#000050",
+        "#FF00FF",
+        "#FFFF50",
+        "#FFFFFF"
+    ]
+}