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Diffstat (limited to 'engines/scumm/player_v5m.cpp')
| -rw-r--r-- | engines/scumm/player_v5m.cpp | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/engines/scumm/player_v5m.cpp b/engines/scumm/player_v5m.cpp new file mode 100644 index 0000000000..500f3bbc40 --- /dev/null +++ b/engines/scumm/player_v5m.cpp @@ -0,0 +1,246 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * 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. + * + */ + +/* + From Markus Magnuson (superqult) we got this information: + Mac0 + --- + 4 bytes - 'SOUN' + BE 4 bytes - block length + + 4 bytes - 'Mac0' + BE 4 bytes - (blockLength - 27) + 28 bytes - ??? + + do this three times (once for each channel): + 4 bytes - 'Chan' + BE 4 bytes - channel length + 4 bytes - instrument name (e.g. 'MARI') + + do this for ((chanLength-24)/4) times: + 2 bytes - note duration + 1 byte - note value + 1 byte - note velocity + + 4 bytes - ??? + 4 bytes - 'Loop'/'Done' + 4 bytes - ??? + + 1 byte - 0x09 + --- + + The instruments presumably correspond to the snd resource names in the + Monkey Island executable: + + Instruments + "MARI" - MARIMBA + "PLUC" - PLUCK + "HARM" - HARMONIC + "PIPE" - PIPEORGAN + "TROM" - TROMBONE + "STRI" - STRINGS + "HORN" - HORN + "VIBE" - VIBES + "SHAK" - SHAKUHACHI + "PANP" - PANPIPE + "WHIS" - WHISTLE + "ORGA" - ORGAN3 + "BONG" - BONGO + "BASS" - BASS + + --- + + Note values <= 1 are silent. +*/ + +#include "common/macresman.h" +#include "common/translation.h" +#include "engines/engine.h" +#include "gui/message.h" +#include "scumm/player_v5m.h" +#include "scumm/scumm.h" + +namespace Scumm { + +Player_V5M::Player_V5M(ScummEngine *scumm, Audio::Mixer *mixer) + : Player_Mac(scumm, mixer, 3, 0x07, false) { + assert(_vm->_game.id == GID_MONKEY); +} + +// Try both with and without underscore in the filename, because hfsutils may +// turn the space into an underscore. At least, it did for me. + +static const char *monkeyIslandFileNames[] = { + "Monkey Island", + "Monkey_Island" +}; + +bool Player_V5M::checkMusicAvailable() { + Common::MacResManager resource; + + for (int i = 0; i < ARRAYSIZE(monkeyIslandFileNames); i++) { + if (resource.exists(monkeyIslandFileNames[i])) { + return true; + } + } + + GUI::MessageDialog dialog(_( + "Could not find the 'Monkey Island' Macintosh executable to read the\n" + "instruments from. Music will be disabled."), _("OK")); + dialog.runModal(); + return false; +} + +bool Player_V5M::loadMusic(const byte *ptr) { + Common::MacResManager resource; + bool found = false; + uint i; + + for (i = 0; i < ARRAYSIZE(monkeyIslandFileNames); i++) { + if (resource.open(monkeyIslandFileNames[i])) { + found = true; + break; + } + } + + if (!found) { + return false; + } + + ptr += 8; + // TODO: Decipher the unknown bytes in the header. For now, skip 'em + ptr += 28; + + Common::MacResIDArray idArray = resource.getResIDArray(RES_SND); + + // Load the three channels and their instruments + for (i = 0; i < 3; i++) { + assert(READ_BE_UINT32(ptr) == MKTAG('C', 'h', 'a', 'n')); + uint32 len = READ_BE_UINT32(ptr + 4); + uint32 instrument = READ_BE_UINT32(ptr + 8); + + _channel[i]._length = len - 20; + _channel[i]._data = ptr + 12; + _channel[i]._looped = (READ_BE_UINT32(ptr + len - 8) == MKTAG('L', 'o', 'o', 'p')); + _channel[i]._pos = 0; + _channel[i]._pitchModifier = 0; + _channel[i]._velocity = 0; + _channel[i]._remaining = 0; + _channel[i]._notesLeft = true; + + for (uint j = 0; j < idArray.size(); j++) { + Common::String name = resource.getResName(RES_SND, idArray[j]); + if (instrument == READ_BE_UINT32(name.c_str())) { + debug(6, "Player_V5M::loadMusic: Channel %d: Loading instrument '%s'", i, name.c_str()); + Common::SeekableReadStream *stream = resource.getResource(RES_SND, idArray[j]); + + if (!_channel[i].loadInstrument(stream)) { + resource.close(); + return false; + } + + break; + } + } + + ptr += len; + } + + resource.close(); + + // The last note of each channel is just zeroes. We will adjust this + // note so that all the channels end at the same time. + + uint32 samples[3]; + uint32 maxSamples = 0; + for (i = 0; i < 3; i++) { + samples[i] = 0; + for (uint j = 0; j < _channel[i]._length; j += 4) { + samples[i] += durationToSamples(READ_BE_UINT16(&_channel[i]._data[j])); + } + if (samples[i] > maxSamples) { + maxSamples = samples[i]; + } + } + + for (i = 0; i < 3; i++) { + _lastNoteSamples[i] = maxSamples - samples[i]; + } + + return true; +} + +bool Player_V5M::getNextNote(int ch, uint32 &samples, int &pitchModifier, byte &velocity) { + if (_channel[ch]._pos >= _channel[ch]._length) { + if (!_channel[ch]._looped) { + _channel[ch]._notesLeft = false; + return false; + } + // FIXME: Jamieson630: The jump seems to be happening + // too quickly! There should maybe be a pause after + // the last Note Off? But I couldn't find one in the + // MI1 Lookout music, where I was hearing problems. + _channel[ch]._pos = 0; + } + uint16 duration = READ_BE_UINT16(&_channel[ch]._data[_channel[ch]._pos]); + byte note = _channel[ch]._data[_channel[ch]._pos + 2]; + samples = durationToSamples(duration); + + if (note != 1) { + _channel[ch]._instrument.newNote(); + } + + if (note > 1) { + pitchModifier = noteToPitchModifier(note, &_channel[ch]._instrument); + velocity = _channel[ch]._data[_channel[ch]._pos + 3]; + } else if (note == 1) { + // This is guesswork, but Monkey Island uses two different + // "special" note values: 0, which is clearly a rest, and 1 + // which is... I thought at first it was a "soft" key off, to + // fade out the note, but listening to the music in a Mac + // emulator (which unfortunately doesn't work all that well), + // I hear no trace of fading out. + // + // It could mean "change the volume on the current note", but + // I can't hear that either, and it always seems to use the + // exact same velocity on this note. + // + // So it appears it really just is a "hold the current note", + // but why? Couldn't they just have made the original note + // longer? + + pitchModifier = _channel[ch]._pitchModifier; + velocity = _channel[ch]._velocity; + } else { + pitchModifier = 0; + velocity = 0; + } + + _channel[ch]._pos += 4; + + if (_channel[ch]._pos >= _channel[ch]._length) { + samples = _lastNoteSamples[ch]; + } + return true; +} + +} // End of namespace Scumm |