C++ (Cpp) waveform_get_n_frames примеры использования

Пример #1

static size_t
get_n_words(Waveform* wv, const char* peakfile)
{
	//ardour peak files are oversized. To get the useable size, we need to refer to the original file.

	int64_t n_frames = waveform_get_n_frames(wv);

	dbg(3, "n_frames=%Li n_peaks=%zu", n_frames, (size_t)(ceil(((float)n_frames) / WF_PEAK_RATIO)));

	return ceil(((float)n_frames) / WF_PEAK_RATIO);
}

Пример #2

Файл: actor_test.c Проект: EQ4/libwaveform

int
main (int argc, char *argv[])
{
	set_log_handlers();

	wf_debug = 1;

	gtk_init(&argc, &argv);
	if(!(glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGBA | GDK_GL_MODE_DEPTH | GDK_GL_MODE_DOUBLE))){
		gerr ("Cannot initialise gtkglext."); return EXIT_FAILURE;
	}

	GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	canvas = gtk_drawing_area_new();

#ifdef HAVE_GTK_2_18
	gtk_widget_set_can_focus     (canvas, true);
#endif
	gtk_widget_set_size_request  (canvas, 320, 128);
	gtk_widget_set_gl_capability (canvas, glconfig, NULL, 1, GDK_GL_RGBA_TYPE);
	gtk_widget_add_events        (canvas, GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
	gtk_container_add((GtkContainer*)window, (GtkWidget*)canvas);

	agl_get_instance()->pref_use_shaders = USE_SHADERS;

	scene = (AGlRootActor*)agl_actor__new_root(canvas);

	char* filename = g_build_filename(g_get_current_dir(), "test/data/mono_0:10.wav", NULL);
	w1 = waveform_load_new(filename);
	g_free(filename);

	wfc = wf_canvas_new(scene);

	int n_frames = waveform_get_n_frames(w1);

	WfSampleRegion region[] = {
		{0,            n_frames     - 1},
		{0,            n_frames / 2 - 1},
		{n_frames / 4, n_frames / 4 - 1},
		{n_frames / 2, n_frames / 2 - 1},
	};

	uint32_t colours[4][2] = {
		{0xffffff77, 0x0000ffff},
		{0x66eeffff, 0x0000ffff},
		{0xffdd66ff, 0x0000ffff},
		{0x66ff66ff, 0x0000ffff},
	};

	int i; for(i=0;i<G_N_ELEMENTS(a);i++){
		a[i] = wf_canvas_add_new_actor(wfc, w1);
		agl_actor__add_child((AGlActor*)scene, (AGlActor*)a[i]);

		wf_actor_set_region(a[i], &region[i]);
		wf_actor_set_colour(a[i], colours[i][0]);
	}

	g_signal_connect((gpointer)canvas, "realize",       G_CALLBACK(on_canvas_realise), NULL);
	g_signal_connect((gpointer)canvas, "size-allocate", G_CALLBACK(on_allocate), NULL);
	g_signal_connect((gpointer)canvas, "expose-event",  G_CALLBACK(agl_actor__on_expose), scene);

	gtk_widget_show_all(window);

	add_key_handlers((GtkWindow*)window, NULL, (Key*)&keys);

	bool window_on_delete(GtkWidget* widget, GdkEvent* event, gpointer user_data)
	{
		gtk_main_quit();
		return false;
	}