initial commit

2026-03-27 10:26:47 -07:00
commit 5df346e342
38 changed files with 1687 additions and 0 deletions
--- a/spectrum_class.cpp
+++ b/spectrum_class.cpp
@@ -0,0 +1,126 @@
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_timer.h>
+#include <SDL2/SDL_ttf.h>
+#include <stdio.h>
+#include <cmath>
+#include <unistd.h>
+#include <iostream>
+#include <chrono>
+#include "scope.h"
+
+// Spectrum class method bodies
+// Spectrum window
+
+int spectrum_window_class::draw_trace(int *spectrum_data, int spectrum_data_size)
+  {
+  int spectrum_data_counter;
+  int *current_spectrum_data_value;
+  int *prev_spectrum_data_value;
+  int this_spectrum_data_size;
+  
+  if (spectrum_data_size >= max_spectrum_trace_width)
+    {
+    this_spectrum_data_size = max_spectrum_trace_width;
+    }
+  else
+    {
+    this_spectrum_data_size = spectrum_data_size;
+    }
+
+  //printf("this size %d\n", this_spectrum_data_size);
+  //Clear the window
+  SDL_SetRenderDrawColor(renderer_for_spectrum, (Uint8)40, (Uint8)40, (Uint8)0, (Uint8)255);
+  SDL_RenderClear(renderer_for_spectrum);
+
+  // Render word Spectrum
+  SDL_RenderCopy(renderer_for_spectrum, texture_for_spectrum, NULL, &rect_for_spectrum);
+  
+  // green trace
+  SDL_SetRenderDrawColor(renderer_for_spectrum, (Uint8)0, (Uint8)(255), (Uint8)255, (Uint8)255);
+
+  for (spectrum_data_counter = 1; spectrum_data_counter < this_spectrum_data_size; spectrum_data_counter += 1)
+    {
+    current_spectrum_data_value = spectrum_data + spectrum_data_counter;
+    prev_spectrum_data_value = spectrum_data + spectrum_data_counter - 1;
+    SDL_RenderDrawLine (renderer_for_spectrum, x_spectrum_window_trace_base + spectrum_data_counter -1,
+      y_spectrum_window_trace_base + *prev_spectrum_data_value,
+      x_spectrum_window_trace_base + spectrum_data_counter,
+      y_spectrum_window_trace_base + *current_spectrum_data_value);
+    }
+       
+  SDL_RenderPresent(renderer_for_spectrum);
+  return 0;
+  }
+
+int spectrum_window_class::get_max_spectrum_trace_width()
+  {
+  return max_spectrum_trace_width;
+  } 
+
+int spectrum_window_class::get_max_spectrum_trace_height()
+  {
+  return max_spectrum_trace_height;
+  }
+
+
+spectrum_window_class::spectrum_window_class (int x_main_window_size, int y_main_window_size)
+  {
+  x_spectrum_window_position = 30 + (int)(x_main_window_size / 2);
+  y_spectrum_window_position = 5;
+  x_spectrum_window_size = ((int)(x_main_window_size / 2)) - 10;
+  y_spectrum_window_size = (((int)(y_main_window_size / 3)) * 2) - 10;
+  x_spectrum_window_trace_base = 1;
+  y_spectrum_window_trace_base = y_spectrum_window_size - 2;
+  max_spectrum_trace_width = x_spectrum_window_size - 2;
+  max_spectrum_trace_height = y_spectrum_window_size;
+  if ((window_for_spectrum = SDL_CreateWindow("Spectrum",
+    x_spectrum_window_position, y_spectrum_window_position,
+    x_spectrum_window_size, y_spectrum_window_size,0)) == NULL) {
+      printf("error opening spectrum window SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  printf("spectrum window: window_size %d x pos %d max trace width %d\n",
+    x_spectrum_window_size, x_spectrum_window_position, max_spectrum_trace_width);
+
+  SDL_SetWindowBordered(window_for_spectrum, SDL_FALSE); 
+
+  if ((renderer_for_spectrum = SDL_CreateRenderer(window_for_spectrum, -1, 0)) == NULL) {
+      printf("error opening spectrum renderer SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+  
+  if ((font_for_spectrum = TTF_OpenFont("/usr/share/fonts/truetype/freefont/FreeSans.ttf",
+    24)) == NULL) {
+      printf("error opening spectrum font SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  color_for_spectrum = {255,255,255};
+  
+  if ((surface_for_spectrum = TTF_RenderText_Solid(font_for_spectrum, 
+    "SPECTRUM ANALYZER", color_for_spectrum)) == NULL) {
+      printf("error opening spectrum surface SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+
+  if ((texture_for_spectrum = SDL_CreateTextureFromSurface(renderer_for_spectrum,
+    surface_for_spectrum)) == NULL) {
+      printf("error opening spectrum texture SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  rect_for_spectrum.x = x_spectrum_window_trace_base + ((int)(max_spectrum_trace_width/2) -
+    (int)(surface_for_spectrum->w / 2));
+  rect_for_spectrum.y = 20;
+  rect_for_spectrum.w = surface_for_spectrum->w;
+  rect_for_spectrum.h = surface_for_spectrum->h;
+
+  SDL_SetRenderDrawColor(renderer_for_spectrum, (Uint8)40, (Uint8)40, (Uint8)0, (Uint8)255);
+
+  SDL_RenderClear(renderer_for_spectrum);
+  SDL_RenderCopy(renderer_for_spectrum, texture_for_spectrum, NULL, &rect_for_spectrum);
+
+  SDL_RenderPresent(renderer_for_spectrum);
+  }