/* Function: al_reserve_samples
*/
bool al_reserve_samples(int reserve_samples)
{
int i;
int current_samples_count = (int) _al_vector_size(&auto_samples);
ASSERT(reserve_samples >= 0);
/* If no default mixer has been set by the user, then create a voice
* and a mixer, and set them to be the default one for use with
* al_play_sample().
*/
if (default_mixer == NULL) {
if (!al_restore_default_mixer())
goto Error;
}
if (current_samples_count < reserve_samples) {
/* We need to reserve more samples than currently are reserved. */
for (i = 0; i < reserve_samples - current_samples_count; i++) {
ALLEGRO_SAMPLE_INSTANCE **slot = _al_vector_alloc_back(&auto_samples);
int *id = _al_vector_alloc_back(&auto_sample_ids);
*id = 0;
*slot = al_create_sample_instance(NULL);
if (!*slot) {
ALLEGRO_ERROR("al_create_sample failed\n");
goto Error;
}
if (!al_attach_sample_instance_to_mixer(*slot, default_mixer)) {
ALLEGRO_ERROR("al_attach_mixer_to_sample failed\n");
goto Error;
}
}
}
else if (current_samples_count > reserve_samples) {
/* We need to reserve fewer samples than currently are reserved. */
while (current_samples_count-- > reserve_samples) {
_al_vector_delete_at(&auto_samples, current_samples_count);
_al_vector_delete_at(&auto_sample_ids, current_samples_count);
}
}
return true;
Error:
free_sample_vector();
return false;
}
/* Function: al_set_default_mixer
*/
bool al_set_default_mixer(ALLEGRO_MIXER *mixer)
{
ASSERT(mixer != NULL);
if (mixer != default_mixer) {
int i;
default_mixer = mixer;
/* Destroy all current sample instances, recreate them, and
* attach them to the new mixer */
for (i = 0; i < (int) _al_vector_size(&auto_samples); i++) {
ALLEGRO_SAMPLE_INSTANCE **slot = _al_vector_ref(&auto_samples, i);
int *id = _al_vector_ref(&auto_sample_ids, i);
*id = 0;
al_destroy_sample_instance(*slot);
*slot = al_create_sample_instance(NULL);
if (!*slot) {
ALLEGRO_ERROR("al_create_sample failed\n");
goto Error;
}
if (!al_attach_sample_instance_to_mixer(*slot, default_mixer)) {
ALLEGRO_ERROR("al_attach_mixer_to_sample failed\n");
goto Error;
}
}
}
return true;
Error:
free_sample_vector();
default_mixer = NULL;
return false;
}