Exemplo n.º 1
0
/* 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;
}
Exemplo n.º 2
0
/* 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;
}