128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
#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);
|
|
}
|