C++ (Cpp) al_attach_sample_instance_to_voice Examples

Example #1

File: kcm_instance.c Project: georgp24/microwindows-android-bin

/* Function: al_set_sample
 */
bool al_set_sample(ALLEGRO_SAMPLE_INSTANCE *spl, ALLEGRO_SAMPLE *data)
{
   sample_parent_t old_parent;
   bool need_reattach;

   ASSERT(spl);

   /* Stop the sample if it is playing. */
   if (spl->is_playing) {
      if (!al_set_sample_instance_playing(spl, false)) {
         /* Shouldn't happen. */
         ASSERT(false);
         return false;
      }
   }

   if (!data) {
      if (spl->parent.u.ptr) {
         _al_kcm_detach_from_parent(spl);
      }
      spl->spl_data.buffer.ptr = NULL;
      return true;
   }

   /* Have data. */

   need_reattach = false;
   if (spl->parent.u.ptr != NULL) {
      if (spl->spl_data.frequency != data->frequency ||
            spl->spl_data.depth != data->depth ||
            spl->spl_data.chan_conf != data->chan_conf) {
         old_parent = spl->parent;
         need_reattach = true;
         _al_kcm_detach_from_parent(spl);
      }
   }

   spl->spl_data = *data;
   spl->spl_data.free_buf = false;
   spl->pos = 0;
   spl->loop_start = 0;
   spl->loop_end = data->len;
   /* Should we reset the loop mode? */

   if (need_reattach) {
      if (old_parent.is_voice) {
         if (!al_attach_sample_instance_to_voice(spl, old_parent.u.voice)) {
            spl->spl_data.buffer.ptr = NULL;
            return false;
         }
      }
      else {
         if (!al_attach_sample_instance_to_mixer(spl, old_parent.u.mixer)) {
            spl->spl_data.buffer.ptr = NULL;
            return false;
         }
      }
   }

   return true;
}

Example #2

File: ex_kcm_direct.c Project: EricMayberryIV/COP3330-Introduction-to-OOP

int main(int argc, char **argv)
{
   ALLEGRO_VOICE *voice;
   ALLEGRO_SAMPLE_INSTANCE *sample;
   int i;

   if (argc < 2) {
      fprintf(stderr, "Usage: %s {audio_files}\n", argv[0]);
      return 1;
   }

   if (!al_init()) {
      fprintf(stderr, "Could not init Allegro.\n");
      return 1;
   }

   al_init_acodec_addon();

   if (!al_install_audio()) {
      fprintf(stderr, "Could not init sound!\n");
      return 1;
   }

   for (i = 1; i < argc; ++i) {
      ALLEGRO_SAMPLE *sample_data = NULL;
      const char *filename = argv[i];
      ALLEGRO_CHANNEL_CONF chan;
      ALLEGRO_AUDIO_DEPTH depth;
      unsigned long freq;
      float sample_time = 0;

      /* Load the entire sound file from disk. */
      sample_data = al_load_sample(filename);
      if (!sample_data) {
         fprintf(stderr, "Could not load sample from '%s'!\n",
            filename);
         continue;
      }

      sample = al_create_sample_instance(NULL);
      if (!sample) {
         fprintf(stderr, "al_create_sample failed.\n");
        return 1;
      }

      if (!al_set_sample(sample, sample_data)) {
         fprintf(stderr, "al_set_sample failed.\n");
         continue;
      }

      depth = al_get_sample_instance_depth(sample);
      chan = al_get_sample_instance_channels(sample);
      freq = al_get_sample_instance_frequency(sample);
      fprintf(stderr, "Loaded sample: %i-bit depth, %i channels, %li Hz\n",
         (depth < 8) ? (8+depth*8) : 0, (chan>>4)+(chan%0xF), freq);
      fprintf(stderr, "Trying to create a voice with the same specs... ");
      voice = al_create_voice(freq, depth, chan);
      if (!voice) {
         fprintf(stderr, "Could not create ALLEGRO_VOICE.\n");
         return 1;
      }
      fprintf(stderr, "done.\n");

      if (!al_attach_sample_instance_to_voice(sample, voice)) {
         fprintf(stderr, "al_attach_sample_instance_to_voice failed.\n");
         return 1;
      }

      /* 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);
      fprintf(stderr, "Playing '%s' (%.3f seconds) 3 times", filename,
         sample_time);

      al_rest(sample_time * 3);

      al_stop_sample_instance(sample);
      fprintf(stderr, "\n");

      /* Free the memory allocated. */
      al_set_sample(sample, NULL);
      al_destroy_sample(sample_data);
      al_destroy_sample_instance(sample);
      al_destroy_voice(voice);
   }

   al_uninstall_audio();

   return 0;
}