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dimuse.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.cpp,v 1.132.2.1 2005/10/18 02:11:25 sev Exp $
 */

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

#include "scumm/actor.h"
#include "scumm/saveload.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 {

IMuseDigital::Track::Track()
      : soundId(-1), used(false), stream(NULL), stream2(NULL) {
}

void IMuseDigital::timer_handler(void *refCon) {
      IMuseDigital *imuseDigital = (IMuseDigital *)refCon;
      imuseDigital->callback();
}

IMuseDigital::IMuseDigital(ScummEngine *scumm, int fps)
      : _vm(scumm) {
      _pause = false;
      _sound = new ImuseDigiSndMgr(_vm);
      _callbackFps = fps;
      resetState();
      for (int l = 0; l < MAX_DIGITAL_TRACKS + MAX_DIGITAL_FADETRACKS; l++) {
            _track[l] = new Track;
            _track[l]->trackId = l;
            _track[l]->used = false;
      }
      _vm->_timer->installTimerProc(timer_handler, 1000000 / _callbackFps, this);

      _audioNames = NULL;
      _numAudioNames = 0;
}

IMuseDigital::~IMuseDigital() {
      stopAllSounds();
      _vm->_timer->removeTimerProc(timer_handler);
      for (int l = 0; l < MAX_DIGITAL_TRACKS + MAX_DIGITAL_FADETRACKS; l++) {
            delete _track[l];
      }
      delete _sound;
      free(_audioNames);
}

void IMuseDigital::resetState() {
      _curMusicState = 0;
      _curMusicSeq = 0;
      _curMusicCue = 0;
      memset(_attributes, 0, sizeof(_attributes));
      _nextSeqToPlay = 0;
}

void IMuseDigital::saveOrLoad(Serializer *ser) {
      Common::StackLock lock(_mutex, "IMuseDigital::saveOrLoad()");

      const SaveLoadEntry mainEntries[] = {
            MK_OBSOLETE(IMuseDigital, _volVoice, sleInt32, VER(31), VER(42)),
            MK_OBSOLETE(IMuseDigital, _volSfx, sleInt32, VER(31), VER(42)),
            MK_OBSOLETE(IMuseDigital, _volMusic, sleInt32, VER(31), VER(42)),
            MKLINE(IMuseDigital, _curMusicState, sleInt32, VER(31)),
            MKLINE(IMuseDigital, _curMusicSeq, sleInt32, VER(31)),
            MKLINE(IMuseDigital, _curMusicCue, sleInt32, VER(31)),
            MKLINE(IMuseDigital, _nextSeqToPlay, sleInt32, VER(31)),
            MKARRAY(IMuseDigital, _attributes[0], sleInt32, 188, VER(31)),
            MKEND()
      };

      const SaveLoadEntry trackEntries[] = {
            MKLINE(Track, pan, sleInt8, VER(31)),
            MKLINE(Track, vol, sleInt32, VER(31)),
            MKLINE(Track, volFadeDest, sleInt32, VER(31)),
            MKLINE(Track, volFadeStep, sleInt32, VER(31)),
            MKLINE(Track, volFadeDelay, sleInt32, VER(31)),
            MKLINE(Track, volFadeUsed, sleByte, VER(31)),
            MKLINE(Track, soundId, sleInt32, VER(31)),
            MKARRAY(Track, soundName[0], sleByte, 15, VER(31)),
            MKLINE(Track, used, sleByte, VER(31)),
            MKLINE(Track, toBeRemoved, sleByte, VER(31)),
            MKLINE(Track, souStream, sleByte, VER(31)),
            MKLINE(Track, started, sleByte, VER(31)),
            MKLINE(Track, priority, sleInt32, VER(31)),
            MKLINE(Track, regionOffset, sleInt32, VER(31)),
            MK_OBSOLETE(Track, trackOffset, sleInt32, VER(31), VER(31)),
            MKLINE(Track, dataOffset, sleInt32, VER(31)),
            MKLINE(Track, curRegion, sleInt32, VER(31)),
            MKLINE(Track, curHookId, sleInt32, VER(31)),
            MKLINE(Track, volGroupId, sleInt32, VER(31)),
            MKLINE(Track, soundType, sleInt32, VER(31)),
            MKLINE(Track, iteration, sleInt32, VER(31)),
            MKLINE(Track, mod, sleInt32, VER(31)),
            MKLINE(Track, mixerFlags, sleInt32, VER(31)),
            MK_OBSOLETE(Track, mixerVol, sleInt32, VER(31), VER(42)),
            MK_OBSOLETE(Track, mixerPan, sleInt32, VER(31), VER(42)),
            MKLINE(Track, compressed, sleByte, VER(45)),
            MKEND()
      };

      ser->_ref_me = this;
      ser->_save_ref = NULL;
      ser->_load_ref = NULL;

      ser->saveLoadEntries(this, mainEntries);

      for (int l = 0; l < MAX_DIGITAL_TRACKS + MAX_DIGITAL_FADETRACKS; l++) {
            Track *track = _track[l];
            if (!ser->isSaving()) {
                  track->compressed = false;
            }
            ser->saveLoadEntries(track, trackEntries);
            if (!ser->isSaving()) {
                  if (!track->used)
                        continue;
                  track->readyToRemove = false;
                  if ((track->toBeRemoved) || (track->souStream) || (track->curRegion == -1)) {
                        track->stream2 = NULL;
                        track->stream = NULL;
                        track->used = false;
                        continue;
                  }

                  track->soundHandle = _sound->openSound(track->soundId,
                                                      track->soundName, track->soundType,
                                                      track->volGroupId, -1);
                  if (!track->soundHandle) {
                        warning("IMuseDigital::saveOrLoad: Can't open sound so will not be resumed, propably on diffrent CD");
                        track->stream2 = NULL;
                        track->stream = NULL;
                        track->used = false;
                        continue;
                  }

                  if (track->compressed) {
                        track->regionOffset = 0;
                  }
                  track->compressed = _sound->isCompressed(track->soundHandle);
                  if (track->compressed) {
                        track->regionOffset = 0;
                  }
                  track->dataOffset = _sound->getRegionOffset(track->soundHandle, track->curRegion);
                  int bits = _sound->getBits(track->soundHandle);
                  int channels = _sound->getChannels(track->soundHandle);
                  int freq = _sound->getFreq(track->soundHandle);
                  track->iteration = freq * channels;
                  track->mixerFlags = 0;
                  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::saveOrLoad(): Can't handle %d bit samples", bits);

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

                  int32 streamBufferSize = track->iteration;
                  track->stream2 = NULL;
                  track->stream = makeAppendableAudioStream(freq, track->mixerFlags, streamBufferSize);

                  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;

                  _vm->_mixer->playInputStream(type, &track->handle, track->stream, -1, vol, pan, false);
            }
      }
}

void IMuseDigital::callback() {
      Common::StackLock lock(_mutex, "IMuseDigital::callback()");

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

                  if (_pause || !_vm)
                        return;

                  if (track->volFadeUsed) {
                        if (track->volFadeStep < 0) {
                              if (track->vol > track->volFadeDest) {
                                    track->vol += track->volFadeStep;
                                    if (track->vol < track->volFadeDest) {
                                          track->vol = track->volFadeDest;
                                          track->volFadeUsed = false;
                                    }
                                    if (track->vol == 0) {
                                          track->toBeRemoved = true;
                                    }
                              }
                        } else if (track->volFadeStep > 0) {
                              if (track->vol < track->volFadeDest) {
                                    track->vol += track->volFadeStep;
                                    if (track->vol > track->volFadeDest) {
                                          track->vol = track->volFadeDest;
                                          track->volFadeUsed = false;
                                    }
                              }
                        }
                        debug(5, "Fade: sound(%d), Vol(%d)", track->soundId, track->vol / 1000);
                  }

                  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;

                  if (track->stream) {
                        byte *data = NULL;
                        int32 result = 0;

                        if (track->curRegion == -1) {
                              switchToNextRegion(track);
                              if (track->toBeRemoved)
                                    continue;
                        }

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

                        int32 mixer_size = track->iteration / _callbackFps;

                        if (track->stream->endOfData()) {
                              mixer_size *= 2;
                        }

                        if ((bits == 12) || (bits == 16)) {
                              if (channels == 1)
                                    mixer_size &= ~1;
                              if (channels == 2)
                                    mixer_size &= ~3;
                        } else {
                              if (channels == 2)
                                    mixer_size &= ~1;
                        }

                        if (mixer_size == 0)
                              continue;

                        do {
                              if (bits == 12) {
                                    byte *ptr = NULL;

                                    mixer_size += track->mod;
                                    int mixer_size_12 = (mixer_size * 3) / 4;
                                    int length = (mixer_size_12 / 3) * 4;
                                    track->mod = mixer_size - length;

                                    int32 offset = (track->regionOffset * 3) / 4;
                                    int result2 = _sound->getDataFromRegion(track->soundHandle, track->curRegion, &ptr, offset, mixer_size_12);
                                    result = BundleCodecs::decode12BitsSample(ptr, &data, result2);

                                    free(ptr);
                              } else if (bits == 16) {
                                    result = _sound->getDataFromRegion(track->soundHandle, track->curRegion, &data, track->regionOffset, mixer_size);
                                    if (channels == 1) {
                                          result &= ~1;
                                    }
                                    if (channels == 2) {
                                          result &= ~3;
                                    }
                              } else if (bits == 8) {
                                    result = _sound->getDataFromRegion(track->soundHandle, track->curRegion, &data, track->regionOffset, mixer_size);
                                    if (channels == 2) {
                                          result &= ~1;
                                    }
                              }

                              if (result > mixer_size)
                                    result = mixer_size;

                              if (_vm->_mixer->isReady()) {
                                    _vm->_mixer->setChannelVolume(track->handle, vol);
                                    _vm->_mixer->setChannelBalance(track->handle, pan);
                                    track->stream->append(data, result);
                                    track->regionOffset += result;
                              }
                              free(data);

                              if (_sound->isEndOfRegion(track->soundHandle, track->curRegion)) {
                                    switchToNextRegion(track);
                                    if (track->toBeRemoved)
                                          break;
                              }
                              mixer_size -= result;
                              assert(mixer_size >= 0);
                        } while (mixer_size != 0);
                  } else if (track->stream2) {
                        if (_vm->_mixer->isReady()) {
                              if (!track->started) {
                                    track->started = true;
                                    _vm->_mixer->playInputStream(type, &track->handle, track->stream2, -1, vol, pan, false);
                              } else {
                                    _vm->_mixer->setChannelVolume(track->handle, vol);
                                    _vm->_mixer->setChannelBalance(track->handle, pan);
                              }
                        }
                  }
            }
      }
}

void IMuseDigital::switchToNextRegion(Track *track) {
      assert(track);
      debug(5, "switchToNextRegion(track:%d)", track->trackId);

      if (track->trackId >= MAX_DIGITAL_TRACKS) {
            track->toBeRemoved = true;
            debug(5, "exit (fadetrack can't go next region) switchToNextRegion(trackId:%d)", track->trackId);
            return;
      }

      int num_regions = _sound->getNumRegions(track->soundHandle);

      if (++track->curRegion == num_regions) {
            track->toBeRemoved = true;
            debug(5, "exit (end of regions) switchToNextRegion(track:%d)", track->trackId);
            return;
      }

      ImuseDigiSndMgr::soundStruct *soundHandle = track->soundHandle;
      int jumpId = _sound->getJumpIdByRegionAndHookId(soundHandle, track->curRegion, track->curHookId);
      if (jumpId == -1)
            jumpId = _sound->getJumpIdByRegionAndHookId(soundHandle, track->curRegion, 0);
      if (jumpId != -1) {
            int region = _sound->getRegionIdByJumpId(soundHandle, jumpId);
            assert(region != -1);
            int sampleHookId = _sound->getJumpHookId(soundHandle, jumpId);
            assert(sampleHookId != -1);
            int fadeDelay = (60 * _sound->getJumpFade(soundHandle, jumpId)) / 1000;
            if (sampleHookId != 0) {
                  if (track->curHookId == sampleHookId) {
                        if (fadeDelay != 0) {
                              Track *fadeTrack = cloneToFadeOutTrack(track, fadeDelay);
                              fadeTrack->dataOffset = _sound->getRegionOffset(fadeTrack->soundHandle, fadeTrack->curRegion);
                              fadeTrack->regionOffset = 0;
                              debug(5, "switchToNextRegion-sound(%d) select region %d, curHookId: %d", fadeTrack->soundId, fadeTrack->curRegion, fadeTrack->curHookId);
                              fadeTrack->curHookId = 0;
                        }
                        track->curRegion = region;
                        debug(5, "switchToNextRegion-sound(%d) jump to region %d, curHookId: %d", track->soundId, track->curRegion, track->curHookId);
                        track->curHookId = 0;
                  }
            } else {
                  if (fadeDelay != 0) {
                        Track *fadeTrack = cloneToFadeOutTrack(track, fadeDelay);
                        fadeTrack->dataOffset = _sound->getRegionOffset(fadeTrack->soundHandle, fadeTrack->curRegion);
                        fadeTrack->regionOffset = 0;
                        debug(5, "switchToNextRegion-sound(%d) select region %d, curHookId: %d", fadeTrack->soundId, fadeTrack->curRegion, fadeTrack->curHookId);
                  }
                  track->curRegion = region;
                  debug(5, "switchToNextRegion-sound(%d) jump to region %d, curHookId: %d", track->soundId, track->curRegion, track->curHookId);
            }
      }

      debug(5, "switchToNextRegion-sound(%d) select region %d, curHookId: %d", track->soundId, track->curRegion, track->curHookId);
      track->dataOffset = _sound->getRegionOffset(soundHandle, track->curRegion);
      track->regionOffset = 0;
}

} // End of namespace Scumm

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