diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 153 |
1 files changed, 0 insertions, 153 deletions
@@ -1,153 +0,0 @@ -#include <gtk/gtk.h> -#include <cairo/cairo.h> -#include <portaudio.h> - -int device = -1; - -typedef struct { - float left; - float right; -} AudioData; - -AudioData audiodata; - -struct data { - int device_num; -}; - -PaStream *stream = NULL; -GtkWidget *drawing_area; - -#define FRAMES_PER_BUFFER 256 - -int patestCallback(const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags, void *userData) -{ - AudioData *data = (AudioData *)userData; - float *in = (float *)inputBuffer; - - if (data->left > 0) { - data->left -= 0.005; - } - - if (data->right > 0) { - data->right -= 0.005; - } - - for (unsigned long i = 0; i < framesPerBuffer * 2; i += 2) { - data->left = MAX(data->left, fabs(in[i])); - data->right = MAX(data->right, fabs(in[i + 1])); - } - - if (drawing_area) { - gtk_widget_queue_draw(GTK_WIDGET(drawing_area)); - } - - return 0; -} - -static void select_device(GtkWidget *widget, gpointer data) -{ - struct data *d = (struct data *)data; - device = d->device_num; - printf("Device %d selected\n", d->device_num); - - PaStreamParameters inputParameters; - memset(&inputParameters, 0, sizeof(inputParameters)); - inputParameters.channelCount = 2; - inputParameters.device = device; - inputParameters.hostApiSpecificStreamInfo = NULL; - inputParameters.sampleFormat = paFloat32; - inputParameters.suggestedLatency = Pa_GetDeviceInfo(device)->defaultLowInputLatency; - - Pa_OpenStream(&stream, &inputParameters, NULL, Pa_GetDeviceInfo(device)->defaultSampleRate, FRAMES_PER_BUFFER, paNoFlag, patestCallback, &audiodata); - Pa_StartStream(stream); -} - -static void draw(cairo_t *cr, GtkWidget *area) -{ - cairo_set_source_rgba(cr, 1, 0, 0, 1); - cairo_arc(cr, 250, 250, audiodata.left * 250, 0, 2 * M_PI); - cairo_arc(cr, 800, 250, audiodata.right * 250, 0, 2 * M_PI); - cairo_fill(cr); - - gtk_widget_queue_draw(area); -} - -static void draw_cb(GtkDrawingArea *drawing_area, cairo_t *cr, int width, int height, gpointer data) -{ - cairo_paint(cr); - draw(cr, data); -} - -static void refresh() -{ -} - -static void activate(GtkApplication *app, gpointer user_data) -{ - GtkWidget *window; - GtkWidget *grid; - GtkWidget *button; - - // init window - window = gtk_application_window_new(app); - gtk_window_set_title(GTK_WINDOW(window), "Directional Audio Visualizer"); - - // init grid - grid = gtk_grid_new(); - gtk_window_set_child(GTK_WINDOW(window), grid); - - // init drawing_area - drawing_area = gtk_drawing_area_new(); - gtk_widget_set_size_request(drawing_area, 1050, 500); - gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(drawing_area), draw_cb, drawing_area, NULL); - gtk_grid_attach(GTK_GRID(grid), drawing_area, 1, 2, 100, 100); - - // init audio devices - Pa_Initialize(); - int numDevices = Pa_GetDeviceCount(); - - if (numDevices < 0) { - printf("Error getting device count.\n"); - exit(EXIT_FAILURE); - } else if (numDevices == 0) { - printf("There are no available audio devices on this machine.\n"); - exit(EXIT_SUCCESS); - } - - // init button for every audio device - for (int i = 0; i < numDevices; i++) { - const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo(i); - struct data *d = malloc(sizeof(struct data)); - d->device_num = i; - button = gtk_button_new_with_label(deviceInfo->name); - g_signal_connect(button, "clicked", G_CALLBACK(select_device), d); - gtk_grid_attach(GTK_GRID(grid), button, 0, numDevices - i - 1, 1, 1); - } - - // init button for refresh - button = gtk_button_new_with_label("Refresh"); - g_signal_connect_swapped(button, "clicked", G_CALLBACK(refresh), window); - gtk_grid_attach(GTK_GRID(grid), button, 1, 0, 1, 1); - - // init button for quit - button = gtk_button_new_with_label("Quit"); - g_signal_connect_swapped(button, "clicked", G_CALLBACK(gtk_window_destroy), window); - gtk_grid_attach(GTK_GRID(grid), button, 1, 1, 1, 1); - - // set window - gtk_window_present(GTK_WINDOW(window)); -} - -int main(int argc, char **argv) -{ - GtkApplication *app; - int status; - - app = gtk_application_new("org.gtk.example", G_APPLICATION_DEFAULT_FLAGS); - g_signal_connect(app, "activate", G_CALLBACK(activate), NULL); - status = g_application_run(G_APPLICATION(app), argc, argv); - g_object_unref(app); - - return status; -} |