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dimuse_track.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001-2005 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/imuse_digi/dimuse_track.cpp,v 1.53.2.2 2005/10/26 17:04:43 lavosspawn Exp $
 */

#include "common/stdafx.h"
#include "common/timer.h"

#include "scumm/actor.h"
#include "scumm/scumm.h"
#include "scumm/sound.h"
#include "scumm/imuse_digi/dimuse.h"
#include "scumm/imuse_digi/dimuse_bndmgr.h"

#include "sound/audiostream.h"
#include "sound/mixer.h"

namespace Scumm {

int IMuseDigital::allocSlot(int priority) {
      int l, lowest_priority = 127;
      int trackId = -1;

      for (l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            if (!_track[l]->used) {
                  trackId = l;
                  break;
            }
      }

      if (trackId == -1) {
            debug(5, "IMuseDigital::startSound(): All slots are full");
            for (l = 0; l < MAX_DIGITAL_TRACKS; l++) {
                  Track *track = _track[l];
                  if (track->used && !track->toBeRemoved &&
                              (lowest_priority > track->priority) && !track->stream2) {
                        lowest_priority = track->priority;
                        trackId = l;
                  }
            }
            if (lowest_priority <= priority) {
                  assert(trackId != -1);
                  _track[trackId]->toBeRemoved = true;
                  debug(5, "IMuseDigital::startSound(): Removed sound %d from track %d", _track[trackId]->soundId, trackId);
            } else {
                  debug(5, "IMuseDigital::startSound(): Priority sound too low");
                  return -1;
            }
      }

      return trackId;
}

void IMuseDigital::startSound(int soundId, const char *soundName, int soundType, int volGroupId, AudioStream *input, int hookId, int volume, int priority) {
      debug(5, "IMuseDigital::startSound(%d)", soundId);

      int l = allocSlot(priority);
      if (l == -1) {
            warning("IMuseDigital::startSound() Can't start sound - no free slots");
            return;
      }

      Track *track = _track[l];
      while (track->used) {
            // The designated track is not yet available. So, we call flushTracks()
            // to get it processed (and thus made ready for us). Since the actual
            // processing is done by another thread, we also call parseEvents to
            // give it some time (and to avoid busy waiting/looping).
            flushTracks();
#ifndef __PLAYSTATION2__
            _vm->parseEvents();
#endif
      }

      track->pan = 64;
      track->vol = volume * 1000;
      track->volFadeDest = 0;
      track->volFadeStep = 0;
      track->volFadeDelay = 0;
      track->volFadeUsed = false;
      track->soundId = soundId;
      track->started = false;
      track->volGroupId = volGroupId;
      track->curHookId = hookId;
      track->priority = priority;
      track->curRegion = -1;
      track->dataOffset = 0;
      track->regionOffset = 0;
      track->mod = 0;
      track->mixerFlags = 0;
      track->toBeRemoved = false;
      track->readyToRemove = false;
      track->soundType = soundType;

      int bits = 0, freq = 0, channels = 0;

      if (input) {
            track->iteration = 0;
            track->souStream = true;
            track->soundName[0] = 0;
      } else {
            track->souStream = false;
            strcpy(track->soundName, soundName);
            track->soundHandle = _sound->openSound(soundId, soundName, soundType, volGroupId, -1);

            if (track->soundHandle == NULL)
                  return;

            track->compressed = _sound->isCompressed(track->soundHandle);

            bits = _sound->getBits(track->soundHandle);
            channels = _sound->getChannels(track->soundHandle);
            freq = _sound->getFreq(track->soundHandle);

            if ((soundId == kTalkSoundID) && (soundType == IMUSE_BUNDLE)) {
                  if (_vm->_actorToPrintStrFor != 0xFF && _vm->_actorToPrintStrFor != 0) {
                        Actor *a = _vm->derefActor(_vm->_actorToPrintStrFor, "IMuseDigital::startSound");
                        freq = (freq * a->_talkFrequency) / 256;
                        track->pan = a->_talkPan;
                        track->vol = a->_talkVolume * 1000;
                  }
            }

            assert(bits == 8 || bits == 12 || bits == 16);
            assert(channels == 1 || channels == 2);
            assert(0 < freq && freq <= 65535);

            track->iteration = freq * channels;
            if (channels == 2)
                  track->mixerFlags = Audio::Mixer::FLAG_STEREO | Audio::Mixer::FLAG_REVERSE_STEREO;

            if ((bits == 12) || (bits == 16)) {
                  track->mixerFlags |= Audio::Mixer::FLAG_16BITS;
                  track->iteration *= 2;
            } else if (bits == 8) {
                  track->mixerFlags |= Audio::Mixer::FLAG_UNSIGNED;
            } else
                  error("IMuseDigital::startSound(): Can't handle %d bit samples", bits);

#ifdef SCUMM_LITTLE_ENDIAN
            if (track->compressed)
                  track->mixerFlags |= Audio::Mixer::FLAG_LITTLE_ENDIAN;
#endif
      }

      if (input) {
            track->stream2 = input;
            track->stream = NULL;
            track->started = false;
      } else {
            const int pan = (track->pan != 64) ? 2 * track->pan - 127 : 0;
            const int vol = track->vol / 1000;
            Audio::Mixer::SoundType type = Audio::Mixer::kPlainSoundType;

            if (track->volGroupId == 1)
                  type = Audio::Mixer::kSpeechSoundType;
            if (track->volGroupId == 2)
                  type = Audio::Mixer::kSFXSoundType;
            if (track->volGroupId == 3)
                  type = Audio::Mixer::kMusicSoundType;

            // setup 1 second stream wrapped buffer
            int32 streamBufferSize = track->iteration;
            track->stream2 = NULL;
            track->stream = makeAppendableAudioStream(freq, track->mixerFlags, streamBufferSize);
            _vm->_mixer->playInputStream(type, &track->handle, track->stream, -1, vol, pan, false);
            track->started = true;
      }

      track->used = true;
}

void IMuseDigital::setPriority(int soundId, int priority) {
      debug(5, "IMuseDigital::setPriority(%d, %d)", soundId, priority);
      assert ((priority >= 0) && (priority <= 127));

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->priority = priority;
            }
      }
}

void IMuseDigital::setVolume(int soundId, int volume) {
      debug(5, "IMuseDigital::setVolume(%d, %d)", soundId, volume);

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->vol = volume * 1000;
            }
      }
}

void IMuseDigital::setHookId(int soundId, int hookId) {
      Common::StackLock lock(_mutex, "IMuseDigital::setHookId()");

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->curHookId = hookId;
            }
      }
}

int IMuseDigital::getCurMusicSoundId() {
      int soundId = -1;

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if (track->used && !track->toBeRemoved && (track->volGroupId == IMUSE_VOLGRP_MUSIC)) {
                  soundId = track->soundId;
            }
      }

      return soundId;
}

char *IMuseDigital::getCurMusicSoundName() {
      char *soundName = NULL;

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if (track->used && !track->toBeRemoved && (track->volGroupId == IMUSE_VOLGRP_MUSIC)) {
                  soundName = track->soundName;
            }
      }

      return soundName;
}

void IMuseDigital::setPan(int soundId, int pan) {
      debug(5, "IMuseDigital::setPan(%d, %d)", soundId, pan);

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->pan = pan;
            }
      }
}

void IMuseDigital::selectVolumeGroup(int soundId, int volGroupId) {
      debug(5, "IMuseDigital::setGroupVolume(%d, %d)", soundId, volGroupId);
      assert((volGroupId >= 1) && (volGroupId <= 4));

      if (volGroupId == 4)
            volGroupId = 3;

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->volGroupId = volGroupId;
            }
      }
}

void IMuseDigital::setFade(int soundId, int destVolume, int delay60HzTicks) {
      Common::StackLock lock(_mutex, "IMuseDigital::setFade()");
      debug(5, "IMuseDigital::setFade(%d, %d, %d)", soundId, destVolume, delay60HzTicks);

      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if ((track->soundId == soundId) && track->used && !track->toBeRemoved) {
                  track->volFadeDelay = delay60HzTicks;
                  track->volFadeDest = destVolume * 1000;
                  track->volFadeStep = (track->volFadeDest - track->vol) * 60 * (1000 / _callbackFps) / (1000 * delay60HzTicks);
                  track->volFadeUsed = true;
            }
      }
}

void IMuseDigital::fadeOutMusic(int fadeDelay) {
      debug(5, "IMuseDigital::fadeOutMusic");
      for (int l = 0; l < MAX_DIGITAL_TRACKS; l++) {
            Track *track = _track[l];
            if (track->used && !track->toBeRemoved && (track->volGroupId == IMUSE_VOLGRP_MUSIC)) {
                  cloneToFadeOutTrack(track, fadeDelay);
                  track->toBeRemoved = true;
            }
      }
}

IMuseDigital::Track *IMuseDigital::cloneToFadeOutTrack(Track *track, int fadeDelay) {
      assert(track);
      Track *fadeTrack = 0;

      debug(5, "IMuseDigital::cloneToFadeOutTrack(%d, %d)", track->trackId, fadeDelay);

      {
            Common::StackLock lock(_mutex, "IMuseDigital::cloneToFadeOutTrack()");
            for (int l = MAX_DIGITAL_TRACKS; l < MAX_DIGITAL_TRACKS + MAX_DIGITAL_FADETRACKS; l++) {
                  if (!_track[l]->used) {
                        fadeTrack = _track[l];
                        break;
                  }
            }
            if (fadeTrack == 0)
                  error("IMuseDigital::cloneToFadeOutTrack() Can't find free fade track");

            fadeTrack->pan = track->pan;
            fadeTrack->vol = track->vol;
            fadeTrack->volGroupId = track->volGroupId;
            fadeTrack->priority = track->priority;
            fadeTrack->soundId = track->soundId;
            fadeTrack->dataOffset = track->dataOffset;
            fadeTrack->regionOffset = track->regionOffset;
            fadeTrack->curRegion = track->curRegion;
            fadeTrack->curHookId = track->curHookId;
            fadeTrack->iteration = track->iteration;
            fadeTrack->mixerFlags = track->mixerFlags;
            fadeTrack->mod = track->mod;
            fadeTrack->toBeRemoved = track->toBeRemoved;
            fadeTrack->readyToRemove = track->readyToRemove;
            fadeTrack->souStream = track->souStream;
            fadeTrack->started = track->started;
            fadeTrack->stream2 = track->stream2;
            strcpy(fadeTrack->soundName, track->soundName);
            fadeTrack->soundType = track->soundType;
            fadeTrack->soundHandle = _sound->cloneSound(track->soundHandle);
            assert(fadeTrack->soundHandle);
      }

      fadeTrack->volFadeDelay = fadeDelay;
      fadeTrack->volFadeDest = 0;
      fadeTrack->volFadeStep = (fadeTrack->volFadeDest - fadeTrack->vol) * 60 * (1000 / _callbackFps) / (1000 * fadeDelay);
      fadeTrack->volFadeUsed = true;

      Audio::Mixer::SoundType type = Audio::Mixer::kPlainSoundType;

      if (fadeTrack->volGroupId == 1)
            type = Audio::Mixer::kSpeechSoundType;
      if (fadeTrack->volGroupId == 2)
            type = Audio::Mixer::kSFXSoundType;
      if (fadeTrack->volGroupId == 3)
            type = Audio::Mixer::kMusicSoundType;

      // setup 1 second stream wrapped buffer
      int32 streamBufferSize = fadeTrack->iteration;
      fadeTrack->stream = makeAppendableAudioStream(_sound->getFreq(fadeTrack->soundHandle), fadeTrack->mixerFlags, streamBufferSize);
      _vm->_mixer->playInputStream(type, &fadeTrack->handle, fadeTrack->stream, -1, fadeTrack->vol / 1000, fadeTrack->pan, false);
      fadeTrack->started = true;
      fadeTrack->used = true;

      return fadeTrack;
}

} // End of namespace Scumm

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