+ /* Mix_VolumeMusic() must be called _after_ Mix_PlayMusic() --
+ this looks like a bug in the SDL_mixer library */
+ Mix_PlayMusic(mixer[audio.music_channel].data_ptr, -1);
+ Mix_VolumeMusic(SOUND_MAX_VOLUME);
+ }
+#endif
+}
+
+static void Mixer_StopChannel(int channel)
+{
+ if (!mixer[channel].active)
+ return;
+
+#if defined(TARGET_SDL)
+ Mix_HaltChannel(channel);
+#elif defined(TARGET_ALLEGRO)
+ voice_set_volume(mixer[channel].voice, 0);
+ deallocate_voice(mixer[channel].voice);
+#endif
+
+ mixer[channel].active = FALSE;
+ mixer_active_channels--;
+}
+
+static void Mixer_StopMusicChannel()
+{
+ Mixer_StopChannel(audio.music_channel);
+
+#if defined(TARGET_SDL)
+ Mix_HaltMusic();
+#endif
+}
+
+static void Mixer_FadeChannel(int channel)
+{
+ if (!mixer[channel].active)
+ return;
+
+ mixer[channel].state |= SND_CTRL_FADE;
+
+#if defined(TARGET_SDL)
+ Mix_FadeOutChannel(channel, SOUND_FADING_INTERVAL);
+#elif defined(TARGET_ALLEGRO)
+ if (voice_check(mixer[channel].voice))
+ voice_ramp_volume(mixer[channel].voice, SOUND_FADING_INTERVAL, 0);
+#endif
+}
+
+static void Mixer_FadeMusicChannel()
+{
+ Mixer_FadeChannel(audio.music_channel);
+
+#if defined(TARGET_SDL)
+ Mix_FadeOutMusic(SOUND_FADING_INTERVAL);
+#endif
+}
+
+static void Mixer_UnFadeChannel(int channel)
+{
+ if (!mixer[channel].active || !IS_FADING(mixer[channel]))
+ return;
+
+ mixer[channel].state &= ~SND_CTRL_FADE;
+ mixer[channel].volume = SOUND_MAX_VOLUME;
+
+#if defined(TARGET_SDL)
+ Mix_ExpireChannel(channel, -1);
+ Mix_Volume(channel, mixer[channel].volume);
+#elif defined(TARGET_ALLEGRO)
+ voice_stop_volumeramp(mixer[channel].voice);
+ voice_ramp_volume(mixer[channel].voice, SOUND_FADING_INTERVAL,
+ mixer[channel].volume);
+#endif
+}
+
+static void Mixer_InsertSound(SoundControl snd_ctrl)
+{
+ SoundInfo *snd_info;
+ int i, k;
+ int num_sounds = getSoundListSize();
+ int num_music = getMusicListSize();
+
+#if 0
+ if (IS_MUSIC(snd_ctrl))
+ printf("NEW MUSIC %d ARRIVED [%d/%d] [%d ACTIVE CHANNELS]\n",
+ snd_ctrl.nr, num_music, num_music_noconf, mixer_active_channels);
+ else
+ printf("NEW SOUND %d ARRIVED [%d] [%d ACTIVE CHANNELS]\n",
+ snd_ctrl.nr, num_sounds, mixer_active_channels);
+#endif
+
+#if 0
+ /* !!! TEST ONLY !!! */
+ if (IS_MUSIC(snd_ctrl))
+ snd_ctrl.nr = 0;
+#endif
+
+#if 1
+ if (IS_MUSIC(snd_ctrl))
+ {
+ if (snd_ctrl.nr >= num_music) /* invalid music */
+ return;
+
+ if (snd_ctrl.nr < 0) /* undefined music */
+ {
+ if (num_music_noconf == 0) /* no fallback music available */
+ return;
+
+ snd_ctrl.nr = (-(snd_ctrl.nr + 1)) % num_music_noconf;
+ snd_info = Music_NoConf[snd_ctrl.nr];
+ }
+ else
+ snd_info = getMusicInfoEntryFromMusicID(snd_ctrl.nr);
+ }
+ else
+ {
+ if (snd_ctrl.nr >= num_sounds)
+ return;
+
+ snd_info = getSoundInfoEntryFromSoundID(snd_ctrl.nr);
+ }
+
+ /*
+ if (snd_ctrl.nr >= (IS_MUSIC(snd_ctrl) ? num_music : num_sounds))
+ return;
+ */
+#else
+ if (IS_MUSIC(snd_ctrl))
+ {
+ if (num_music_noconf == 0)
+ return;
+
+ snd_ctrl.nr = snd_ctrl.nr % num_music_noconf;
+ }
+ else if (snd_ctrl.nr >= num_sounds)
+ return;
+#endif
+
+#if 0
+#if 1
+ snd_info = (IS_MUSIC(snd_ctrl) ? getMusicInfoEntryFromMusicID(snd_ctrl.nr) :
+ getSoundInfoEntryFromSoundID(snd_ctrl.nr));
+#else
+ snd_info = (IS_MUSIC(snd_ctrl) ? Music_NoConf[snd_ctrl.nr] :
+ getSoundInfoEntryFromSoundID(snd_ctrl.nr));
+#endif
+#endif
+
+ if (snd_info == NULL)
+ return;
+
+ /* copy sound sample and format information */
+ snd_ctrl.type = snd_info->type;
+ snd_ctrl.format = snd_info->format;
+ snd_ctrl.data_ptr = snd_info->data_ptr;
+ snd_ctrl.data_len = snd_info->data_len;
+ snd_ctrl.num_channels = snd_info->num_channels;
+
+ /* play music samples on a dedicated music channel */
+ if (IS_MUSIC(snd_ctrl))
+ {
+#if 0
+ printf("::: slot %d, ptr 0x%08x\n", snd_ctrl.nr, snd_ctrl.data_ptr);
+#endif
+
+ Mixer_StopMusicChannel();
+
+ mixer[audio.music_channel] = snd_ctrl;
+ Mixer_PlayMusicChannel();
+
+ return;
+ }
+
+ /* check if (and how often) this sound sample is already playing */
+ for (k=0, i=audio.first_sound_channel; i<audio.num_channels; i++)
+ if (mixer[i].active && SAME_SOUND_DATA(mixer[i], snd_ctrl))
+ k++;
+
+#if 0
+ printf("SOUND %d [CURRENTLY PLAYING %d TIMES]\n", snd_ctrl.nr, k);
+#endif
+
+ /* reset expiration delay for already playing loop sounds */
+ if (k > 0 && IS_LOOP(snd_ctrl))
+ {
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+ if (mixer[i].active && SAME_SOUND_DATA(mixer[i], snd_ctrl))
+ {
+#if 0
+ printf("RESETTING EXPIRATION FOR SOUND %d\n", snd_ctrl.nr);
+#endif
+
+ if (IS_FADING(mixer[i]))
+ Mixer_UnFadeChannel(i);
+
+ /* restore settings like volume and stereo position */
+ mixer[i].volume = snd_ctrl.volume;
+ mixer[i].stereo_position = snd_ctrl.stereo_position;
+
+ Mixer_SetChannelProperties(i);
+ Mixer_ResetChannelExpiration(i);
+
+#if 0
+ printf("RESETTING VOLUME/STEREO FOR SOUND %d TO %d/%d\n",
+ snd_ctrl.nr, snd_ctrl.volume, snd_ctrl.stereo_position);
+#endif
+ }
+ }
+
+ return;
+ }
+
+#if 0
+ printf("PLAYING NEW SOUND %d\n", snd_ctrl.nr);
+#endif
+
+ /* don't play sound more than n times simultaneously (with n == 2 for now) */
+ if (k >= 2)
+ {
+ unsigned long playing_current = Counter();
+ int longest = 0, longest_nr = audio.first_sound_channel;
+
+ /* look for oldest equal sound */
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+ int playing_time = playing_current - mixer[i].playing_starttime;
+ int actual;
+
+ if (!mixer[i].active || !SAME_SOUND_NR(mixer[i], snd_ctrl))
+ continue;
+
+ actual = 1000 * playing_time / mixer[i].data_len;
+
+ if (actual >= longest)
+ {
+ longest = actual;
+ longest_nr = i;
+ }
+ }
+
+ Mixer_StopChannel(longest_nr);
+ }
+
+ /* If all (non-music) channels are active, stop the channel that has
+ played its sound sample most completely (in percent of the sample
+ length). As we cannot currently get the actual playing position
+ of the channel's sound sample when compiling with the SDL mixer
+ library, we use the current playing time (in milliseconds) instead. */
+
+#if DEBUG
+ /* channel allocation sanity check -- should not be needed */
+ if (mixer_active_channels ==
+ audio.num_channels - (mixer[audio.music_channel].active ? 0 : 1))
+ {
+ for (i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+ if (!mixer[i].active)
+ {
+ Error(ERR_RETURN, "Mixer_InsertSound: Channel %d inactive", i);
+ Error(ERR_RETURN, "Mixer_InsertSound: This should never happen!");
+
+ mixer_active_channels--;
+ }
+ }
+ }
+#endif
+
+ if (mixer_active_channels ==
+ audio.num_channels - (mixer[audio.music_channel].active ? 0 : 1))
+ {
+ unsigned long playing_current = Counter();
+ int longest = 0, longest_nr = audio.first_sound_channel;
+
+#if 0
+#if DEBUG
+ /* print some debugging information about audio channel usage */
+ for (i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+ Error(ERR_RETURN, "Mixer_InsertSound: %d [%d]: %ld (%ld)",
+ i, mixer[i].active, mixer[i].data_len, (long)mixer[i].data_ptr);
+ }
+#endif
+#endif
+
+ for (i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+ int playing_time = playing_current - mixer[i].playing_starttime;
+ int actual = 1000 * playing_time / mixer[i].data_len;
+
+ if (!IS_LOOP(mixer[i]) && actual > longest)
+ {
+ longest = actual;
+ longest_nr = i;
+ }
+ }
+
+ Mixer_StopChannel(longest_nr);
+ }
+
+ /* add the new sound to the mixer */
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ {
+#if 0
+ printf("CHECKING CHANNEL %d FOR SOUND %d ...\n", i, snd_ctrl.nr);
+#endif
+
+ if (!mixer[i].active)
+ {
+#if 0
+ printf("ADDING NEW SOUND %d TO MIXER\n", snd_ctrl.nr);
+#endif
+
+#if defined(AUDIO_UNIX_NATIVE)
+ if (snd_info->data_len == 0)
+ {
+ printf("THIS SHOULD NEVER HAPPEN! [snd_info->data_len == 0]\n");
+ }
+#endif
+
+ mixer[i] = snd_ctrl;
+ Mixer_PlayChannel(i);
+
+ break;
+ }
+ }
+}
+
+static void HandleSoundRequest(SoundControl snd_ctrl)
+{
+ int i;
+
+#if defined(AUDIO_UNIX_NATIVE)
+ if (IS_PARENT_PROCESS())
+ {
+ SendSoundControlToMixerProcess(&snd_ctrl);
+ return;
+ }
+#endif
+
+ /* deactivate channels that have expired since the last request */
+ for (i=0; i<audio.num_channels; i++)
+ if (mixer[i].active && Mixer_ChannelExpired(i))
+ Mixer_StopChannel(i);
+
+ if (IS_RELOADING(snd_ctrl)) /* load new sound or music files */
+ {
+ Mixer_StopMusicChannel();
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ Mixer_StopChannel(i);
+
+#if defined(AUDIO_UNIX_NATIVE)
+ CloseAudioDevice(&audio.device_fd);
+ ReadReloadInfoFromPipe(&snd_ctrl);
+#endif
+
+ if (snd_ctrl.state & SND_CTRL_RELOAD_SOUNDS)
+ ReloadCustomSounds();
+ else
+ ReloadCustomMusic();
+ }
+ else if (IS_FADING(snd_ctrl)) /* fade out existing sound or music */
+ {
+ if (IS_MUSIC(snd_ctrl))
+ {
+ Mixer_FadeMusicChannel();
+ return;
+ }
+
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ if (SAME_SOUND_NR(mixer[i], snd_ctrl) || ALL_SOUNDS(snd_ctrl))
+ Mixer_FadeChannel(i);
+ }
+ else if (IS_STOPPING(snd_ctrl)) /* stop existing sound or music */
+ {
+ if (IS_MUSIC(snd_ctrl))
+ {
+ Mixer_StopMusicChannel();
+ return;
+ }
+
+ for(i=audio.first_sound_channel; i<audio.num_channels; i++)
+ if (SAME_SOUND_NR(mixer[i], snd_ctrl) || ALL_SOUNDS(snd_ctrl))
+ Mixer_StopChannel(i);
+
+#if defined(AUDIO_UNIX_NATIVE)
+ if (!mixer_active_channels)
+ CloseAudioDevice(&audio.device_fd);
+#endif
+ }
+ else if (snd_ctrl.active) /* add new sound to mixer */
+ {
+ Mixer_InsertSound(snd_ctrl);
+ }
+}