initial commit

2026-03-27 10:26:47 -07:00
commit 5df346e342
38 changed files with 1687 additions and 0 deletions
--- a/audio_class.cpp
+++ b/audio_class.cpp
@@ -0,0 +1,127 @@
+#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"
+
+// Audio class method bodies
+// Audio window
+
+int audio_window_class::draw_trace(int *audio_data, int audio_data_size)
+  {
+  int audio_data_counter;
+  int *current_audio_data_value;
+  int *prev_audio_data_value;
+  int this_audio_data_size;
+  
+  if (audio_data_size >= max_audio_trace_width)
+    {
+    this_audio_data_size = max_audio_trace_width;
+    }
+  else
+    {
+    this_audio_data_size = audio_data_size;
+    }
+
+  //printf("this size %d\n", this_audio_data_size);
+  //Clear the window
+
+  SDL_SetRenderDrawColor(renderer_for_audio, (Uint8)40, (Uint8)40, (Uint8)0, (Uint8)255);
+  SDL_RenderClear(renderer_for_audio);
+
+  // Render word Oscilloscope
+  SDL_RenderCopy(renderer_for_audio, texture_for_audio, NULL, &rect_for_audio);
+  
+  // green trace
+  SDL_SetRenderDrawColor(renderer_for_audio, (Uint8)0, (Uint8)(255), (Uint8)0, (Uint8)255);
+
+  for (audio_data_counter = 1; audio_data_counter < this_audio_data_size; audio_data_counter += 1)
+    {
+    current_audio_data_value = audio_data + audio_data_counter;
+    prev_audio_data_value = audio_data + audio_data_counter - 1;
+    SDL_RenderDrawLine (renderer_for_audio, x_audio_window_trace_base + audio_data_counter -1,
+      y_audio_window_trace_base + *prev_audio_data_value,
+      x_audio_window_trace_base + audio_data_counter,
+      y_audio_window_trace_base + *current_audio_data_value);
+    }
+       
+  SDL_RenderPresent(renderer_for_audio);
+  return 0;
+  }
+
+int audio_window_class::get_max_audio_trace_width()
+  {
+  return max_audio_trace_width;
+  }
+
+int audio_window_class::get_max_audio_trace_height()
+  {
+  return max_audio_trace_height;
+  }
+
+
+audio_window_class::audio_window_class (int x_main_window_size, int y_main_window_size)
+  {
+  x_audio_window_position = 5;
+  y_audio_window_position = 5;
+  x_audio_window_size = ((int)(x_main_window_size / 2)) - 20;
+  y_audio_window_size = (((int)(y_main_window_size / 3)) * 2) - 10;
+  x_audio_window_trace_base = x_audio_window_position;
+  y_audio_window_trace_base = (int)(y_audio_window_size / 2) + y_audio_window_position;
+  max_audio_trace_width = x_audio_window_size;
+  max_audio_trace_height = y_audio_window_size;
+  if ((window_for_audio = SDL_CreateWindow("Oscilloscope",
+    x_audio_window_position, y_audio_window_position,
+    x_audio_window_size, y_audio_window_size,0)) == NULL) {
+      printf("error opening audio window SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  printf("audio window: window_size %d x pos %d max trace width %d\n",
+    x_audio_window_size, x_audio_window_position, max_audio_trace_width);
+
+  SDL_SetWindowBordered(window_for_audio, SDL_FALSE); 
+
+  if ((renderer_for_audio = SDL_CreateRenderer(window_for_audio, -1, 0)) == NULL) {
+      printf("error opening audio renderer SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+  
+  if ((font_for_audio = TTF_OpenFont("/usr/share/fonts/truetype/freefont/FreeSans.ttf",
+    24)) == NULL) {
+      printf("error opening audio font SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  color_for_audio = {255,255,255};
+  
+  if ((surface_for_audio = TTF_RenderText_Solid(font_for_audio, 
+    "OSCILLOSCOPE", color_for_audio)) == NULL) {
+      printf("error opening audio surface SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+
+  if ((texture_for_audio = SDL_CreateTextureFromSurface(renderer_for_audio,
+    surface_for_audio)) == NULL) {
+      printf("error opening audio texture SDL: %s\n", SDL_GetError());
+      exit (0);
+    }
+
+  rect_for_audio.x = x_audio_window_trace_base + ((int)(max_audio_trace_width/2) -
+    (int)(surface_for_audio->w / 2));
+  rect_for_audio.y = 20;
+  rect_for_audio.w = surface_for_audio->w;
+  rect_for_audio.h = surface_for_audio->h;
+
+  SDL_SetRenderDrawColor(renderer_for_audio, (Uint8)40, (Uint8)40, (Uint8)0, (Uint8)255);
+
+  SDL_RenderClear(renderer_for_audio);
+  SDL_RenderCopy(renderer_for_audio, texture_for_audio, NULL, &rect_for_audio);
+
+  SDL_RenderPresent(renderer_for_audio);
+  }