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/*
* Example program for the Allegro library, by Peter Wang.
*
* Test audio properties (gain and panning, for now).
*/
#include "allegro5/allegro.h"
#include "allegro5/allegro_font.h"
#include "allegro5/allegro_primitives.h"
#include "allegro5/allegro_audio.h"
#include "allegro5/allegro_acodec.h"
#include "nihgui.hpp"
#include <cstdio>
#include "common.c"
ALLEGRO_FONT *font_gui;
ALLEGRO_SAMPLE *sample;
ALLEGRO_SAMPLE_INSTANCE *sample_inst;
class Prog {
private:
Dialog d;
Label length_label;
HSlider length_slider;
ToggleButton pan_button;
HSlider pan_slider;
Label speed_label;
HSlider speed_slider;
ToggleButton bidir_button;
ToggleButton play_button;
Label gain_label;
VSlider gain_slider;
Label mixer_gain_label;
VSlider mixer_gain_slider;
Label two_label;
Label one_label;
Label zero_label;
public:
Prog(const Theme & theme, ALLEGRO_DISPLAY *display, unsigned int instance_len);
void run();
void update_properties();
};
Prog::Prog(const Theme & theme, ALLEGRO_DISPLAY *display, unsigned int instance_len) :
d(Dialog(theme, display, 40, 20)),
length_label(Label("Length")),
length_slider(HSlider(instance_len, instance_len)),
pan_button(ToggleButton("Pan")),
pan_slider(HSlider(1000, 2000)),
speed_label(Label("Speed")),
speed_slider(HSlider(1000, 5000)),
bidir_button(ToggleButton("Bidir")),
play_button(ToggleButton("Play")),
gain_label(Label("Gain")),
gain_slider(VSlider(1000, 2000)),
mixer_gain_label(Label("Mixer gain")),
mixer_gain_slider(VSlider(1000, 2000)),
two_label(Label("2.0")),
one_label(Label("1.0")),
zero_label(Label("0.0"))
{
pan_button.set_pushed(true);
play_button.set_pushed(true);
d.add(length_label, 2, 8, 4, 1);
d.add(length_slider, 6, 8, 22, 1);
d.add(pan_button, 2, 10, 4, 1);
d.add(pan_slider, 6, 10, 22, 1);
d.add(speed_label, 2, 12, 4, 1);
d.add(speed_slider, 6, 12, 22, 1);
d.add(bidir_button, 2, 14, 4, 1);
d.add(play_button, 6, 14, 4, 1);
d.add(gain_label, 29, 1, 2, 1);
d.add(gain_slider, 29, 2, 2, 17);
d.add(mixer_gain_label, 33, 1, 6, 1);
d.add(mixer_gain_slider, 35, 2, 2, 17);
d.add(two_label, 32, 2, 2, 1);
d.add(one_label, 32, 10, 2, 1);
d.add(zero_label, 32, 18, 2, 1);
}
void Prog::run()
{
d.prepare();
while (!d.is_quit_requested()) {
if (d.is_draw_requested()) {
update_properties();
al_clear_to_color(al_map_rgb(128, 128, 128));
d.draw();
al_flip_display();
}
d.run_step(true);
}
}
void Prog::update_properties()
{
int length;
float pan;
float speed;
float gain;
float mixer_gain;
if (pan_button.get_pushed())
pan = pan_slider.get_cur_value() / 1000.0f - 1.0f;
else
pan = ALLEGRO_AUDIO_PAN_NONE;
al_set_sample_instance_pan(sample_inst, pan);
speed = speed_slider.get_cur_value() / 1000.0f;
al_set_sample_instance_speed(sample_inst, speed);
length = length_slider.get_cur_value();
al_set_sample_instance_length(sample_inst, length);
if (bidir_button.get_pushed())
al_set_sample_instance_playmode(sample_inst, ALLEGRO_PLAYMODE_BIDIR);
else
al_set_sample_instance_playmode(sample_inst, ALLEGRO_PLAYMODE_LOOP);
al_set_sample_instance_playing(sample_inst, play_button.get_pushed());
gain = gain_slider.get_cur_value() / 1000.0f;
al_set_sample_instance_gain(sample_inst, gain);
mixer_gain = mixer_gain_slider.get_cur_value() / 1000.0f;
al_set_mixer_gain(al_get_default_mixer(), mixer_gain);
}
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display;
const char *filename;
if (argc >= 2) {
filename = argv[1];
}
else {
filename = "data/welcome.wav";
}
if (!al_init()) {
abort_example("Could not init Allegro\n");
}
al_install_keyboard();
al_install_mouse();
al_init_font_addon();
al_init_primitives_addon();
al_init_acodec_addon();
init_platform_specific();
if (!al_install_audio()) {
abort_example("Could not init sound!\n");
}
if (!al_reserve_samples(1)) {
abort_example("Could not set up voice and mixer.\n");
}
sample = al_load_sample(filename);
if (!sample) {
abort_example("Could not load sample from '%s'!\n", filename);
}
al_set_new_display_flags(ALLEGRO_GENERATE_EXPOSE_EVENTS);
display = al_create_display(640, 480);
if (!display) {
abort_example("Unable to create display\n");
}
font_gui = al_create_builtin_font();
if (!font_gui) {
abort_example("Failed to create builtin font\n");
}
/* Loop the sample. */
sample_inst = al_create_sample_instance(sample);
al_set_sample_instance_playmode(sample_inst, ALLEGRO_PLAYMODE_LOOP);
al_attach_sample_instance_to_mixer(sample_inst, al_get_default_mixer());
al_play_sample_instance(sample_inst);
/* Don't remove these braces. */
{
Theme theme(font_gui);
Prog prog(theme, display, al_get_sample_instance_length(sample_inst));
prog.run();
}
al_destroy_sample_instance(sample_inst);
al_destroy_sample(sample);
al_uninstall_audio();
al_destroy_font(font_gui);
return 0;
(void)argc;
(void)argv;
}
/* vim: set sts=3 sw=3 et: */
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