/* Creates the default voice and mixer if they haven't been created yet. */
static bool create_default_mixer(void)
{
int voice_frequency = 44100;
int voice_depth = ALLEGRO_AUDIO_DEPTH_INT16;
int mixer_frequency = 44100;
int mixer_depth = ALLEGRO_AUDIO_DEPTH_FLOAT32;
ALLEGRO_CONFIG *config = al_get_system_config();
const char *p;
p = al_get_config_value(config, "audio", "primary_voice_frequency");
if (p && p[0] != '\0') {
voice_frequency = atoi(p);
}
p = al_get_config_value(config, "audio", "primary_mixer_frequency");
if (p && p[0] != '\0') {
mixer_frequency = atoi(p);
}
p = al_get_config_value(config, "audio", "primary_voice_depth");
if (p && p[0] != '\0') {
voice_depth = string_to_depth(p);
}
p = al_get_config_value(config, "audio", "primary_mixer_depth");
if (p && p[0] != '\0') {
mixer_depth = string_to_depth(p);
}
if (!allegro_voice) {
allegro_voice = al_create_voice(voice_frequency, voice_depth,
ALLEGRO_CHANNEL_CONF_2);
if (!allegro_voice) {
ALLEGRO_ERROR("al_create_voice failed\n");
goto Error;
}
}
if (!allegro_mixer) {
allegro_mixer = al_create_mixer(mixer_frequency, mixer_depth,
ALLEGRO_CHANNEL_CONF_2);
if (!allegro_mixer) {
ALLEGRO_ERROR("al_create_voice failed\n");
goto Error;
}
}
/* In case this function is called multiple times. */
al_detach_mixer(allegro_mixer);
if (!al_attach_mixer_to_voice(allegro_mixer, allegro_voice)) {
ALLEGRO_ERROR("al_attach_mixer_to_voice failed\n");
goto Error;
}
return true;
Error:
if (allegro_mixer) {
al_destroy_mixer(allegro_mixer);
allegro_mixer = NULL;
}
if (allegro_voice) {
al_destroy_voice(allegro_voice);
allegro_voice = NULL;
}
return false;
}
int main(int argc, char **argv)
{
ALLEGRO_VOICE *voice;
ALLEGRO_MIXER *mixer;
ALLEGRO_SAMPLE_INSTANCE *sample;
int i;
char const **filenames;
int n;
if (argc < 2) {
n = 1;
filenames = malloc(sizeof *filenames);
filenames[0] = "data/testing.ogg";
}
else {
n = argc - 1;
filenames = malloc(sizeof *filenames * n);
for (i = 1; i < argc; ++i) {
filenames[i - 1] = argv[i];
}
}
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
open_log();
al_init_acodec_addon();
if (!al_install_audio()) {
abort_example("Could not init sound!\n");
}
voice = al_create_voice(44100, ALLEGRO_AUDIO_DEPTH_INT16,
ALLEGRO_CHANNEL_CONF_2);
if (!voice) {
abort_example("Could not create ALLEGRO_VOICE.\n");
}
mixer = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
if (!mixer) {
abort_example("al_create_mixer failed.\n");
}
if (!al_attach_mixer_to_voice(mixer, voice)) {
abort_example("al_attach_mixer_to_voice failed.\n");
}
sample = al_create_sample_instance(NULL);
if (!sample) {
abort_example("al_create_sample failed.\n");
}
for (i = 0; i < n; ++i) {
ALLEGRO_SAMPLE *sample_data = NULL;
const char *filename = filenames[i];
float sample_time = 0;
/* Load the entire sound file from disk. */
sample_data = al_load_sample(filename);
if (!sample_data) {
abort_example("Could not load sample from '%s'!\n",
filename);
continue;
}
if (!al_set_sample(sample, sample_data)) {
abort_example("al_set_sample_instance_ptr failed.\n");
continue;
}
if (!al_attach_sample_instance_to_mixer(sample, mixer)) {
abort_example("al_attach_sample_instance_to_mixer failed.\n");
goto done;
}
/* Play sample in looping mode. */
al_set_sample_instance_playmode(sample, ALLEGRO_PLAYMODE_LOOP);
al_play_sample_instance(sample);
sample_time = al_get_sample_instance_time(sample);
log_printf("Playing '%s' (%.3f seconds) 3 times", filename,
sample_time);
al_rest(sample_time);
if (!al_set_sample_instance_gain(sample, 0.5)) {
abort_example("Failed to set gain.\n");
}
al_rest(sample_time);
if (!al_set_sample_instance_gain(sample, 0.25)) {
abort_example("Failed to set gain.\n");
}
al_rest(sample_time);
al_stop_sample_instance(sample);
log_printf("\nDone playing '%s'\n", filename);
/* Free the memory allocated. */
al_set_sample(sample, NULL);
al_destroy_sample(sample_data);
}
al_destroy_sample_instance(sample);
al_destroy_mixer(mixer);
al_destroy_voice(voice);
al_uninstall_audio();
done:
close_log(true);
return 0;
}
int main(int argc, char **argv)
{
ALLEGRO_VOICE *voice;
ALLEGRO_MIXER *mixer;
ALLEGRO_MIXER *submixer[2];
ALLEGRO_SAMPLE_INSTANCE *sample[2];
ALLEGRO_SAMPLE *sample_data[2];
float sample_time;
float max_sample_time;
int i;
if (!al_init()) {
abort_example("Could not init Allegro.\n");
}
open_log();
if (argc < 3) {
log_printf("This example needs to be run from the command line.\nUsage: %s file1 file2\n", argv[0]);
goto done;
}
al_init_acodec_addon();
if (!al_install_audio()) {
abort_example("Could not init sound!\n");
}
voice = al_create_voice(44100, ALLEGRO_AUDIO_DEPTH_INT16,
ALLEGRO_CHANNEL_CONF_2);
if (!voice) {
abort_example("Could not create ALLEGRO_VOICE.\n");
}
mixer = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
submixer[0] = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
submixer[1] = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
if (!mixer || !submixer[0] || !submixer[1]) {
abort_example("al_create_mixer failed.\n");
}
if (!al_attach_mixer_to_voice(mixer, voice)) {
abort_example("al_attach_mixer_to_voice failed.\n");
}
for (i = 0; i < 2; i++) {
const char *filename = argv[i + 1];
sample_data[i] = al_load_sample(filename);
if (!sample_data[i]) {
abort_example("Could not load sample from '%s'!\n", filename);
}
sample[i] = al_create_sample_instance(NULL);
if (!sample[i]) {
abort_example("al_create_sample failed.\n");
}
if (!al_set_sample(sample[i], sample_data[i])) {
abort_example("al_set_sample_ptr failed.\n");
}
if (!al_attach_sample_instance_to_mixer(sample[i], submixer[i])) {
abort_example("al_attach_sample_instance_to_mixer failed.\n");
}
if (!al_attach_mixer_to_mixer(submixer[i], mixer)) {
abort_example("al_attach_mixer_to_mixer failed.\n");
}
}
/* Play sample in looping mode. */
for (i = 0; i < 2; i++) {
al_set_sample_instance_playmode(sample[i], ALLEGRO_PLAYMODE_LOOP);
al_play_sample_instance(sample[i]);
}
max_sample_time = al_get_sample_instance_time(sample[0]);
sample_time = al_get_sample_instance_time(sample[1]);
if (sample_time > max_sample_time)
max_sample_time = sample_time;
log_printf("Playing...");
al_rest(max_sample_time);
al_set_sample_instance_gain(sample[0], 0.5);
al_rest(max_sample_time);
al_set_sample_instance_gain(sample[1], 0.25);
al_rest(max_sample_time);
al_stop_sample_instance(sample[0]);
al_stop_sample_instance(sample[1]);
log_printf("Done\n");
/* Free the memory allocated. */
for (i = 0; i < 2; i++) {
al_set_sample(sample[i], NULL);
al_destroy_sample(sample_data[i]);
al_destroy_sample_instance(sample[i]);
al_destroy_mixer(submixer[i]);
}
al_destroy_mixer(mixer);
al_destroy_voice(voice);
al_uninstall_audio();
done:
close_log(true);
return 0;
}
int main(int argc, char **argv)
{
const char *filename = "../demos/cosmic_protector/data/sfx/title_music.ogg";
ALLEGRO_VOICE *voice;
ALLEGRO_MIXER *mixer;
ALLEGRO_AUDIO_STREAM *stream;
if (argc > 1) {
filename = argv[1];
}
if (!al_init()) {
abort_example("Could not init Allegro.\n");
return 1;
}
al_init_primitives_addon();
al_init_image_addon();
al_init_acodec_addon();
al_install_keyboard();
display = al_create_display(640, 480);
if (!display) {
abort_example("Could not create display.\n");
return 1;
}
dbuf = al_create_bitmap(640, 480);
bmp = al_load_bitmap("data/mysha.pcx");
if (!bmp) {
abort_example("Could not load data/mysha.pcx\n");
return 1;
}
if (!al_install_audio()) {
abort_example("Could not init sound.\n");
return 1;
}
voice = al_create_voice(44100, ALLEGRO_AUDIO_DEPTH_INT16,
ALLEGRO_CHANNEL_CONF_2);
if (!voice) {
abort_example("Could not create voice.\n");
return 1;
}
mixer = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32,
ALLEGRO_CHANNEL_CONF_2);
if (!mixer) {
abort_example("Could not create mixer.\n");
return 1;
}
if (!al_attach_mixer_to_voice(mixer, voice)) {
abort_example("al_attach_mixer_to_voice failed.\n");
return 1;
}
stream = al_load_audio_stream(filename, 4, 2048);
if (!stream) {
abort_example("Could not load '%s'\n", filename);
return 1;
}
al_set_audio_stream_playmode(stream, ALLEGRO_PLAYMODE_LOOP);
al_attach_audio_stream_to_mixer(stream, mixer);
al_set_mixer_postprocess_callback(mixer, update_meter, NULL);
main_loop();
al_destroy_audio_stream(stream);
al_destroy_mixer(mixer);
al_destroy_voice(voice);
al_uninstall_audio();
al_destroy_bitmap(dbuf);
al_destroy_bitmap(bmp);
return 0;
}
