scummvm/engines/macventure/sound.cpp
2016-08-19 16:30:24 +02:00

261 lines
7.2 KiB
C++

/* 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.
*
*/
#include "macventure/sound.h"
#include "audio/mixer.h"
#include "audio/audiostream.h"
#include "audio/decoders/raw.h"
namespace MacVenture {
// SoundManager
SoundManager::SoundManager(MacVentureEngine *engine, Audio::Mixer *mixer) {
_container = NULL;
Common::String filename = engine->getFilePath(kSoundPathID);
_container = new Container(filename);
_mixer = mixer;
debugC(1, kMVDebugSound, "Created sound manager with file %s", filename.c_str());
}
SoundManager::~SoundManager(){
if (_container)
delete _container;
Common::HashMap<ObjID, SoundAsset*>::iterator it;
Common::HashMap<ObjID, SoundAsset*>::iterator end = _assets.end();
for (it = _assets.begin(); it != end; it++) {
delete it->_value;
}
}
uint32 SoundManager::playSound(ObjID sound) {
ensureLoaded(sound);
_assets[sound]->play(_mixer, &_handle);
return _assets[sound]->getPlayLength();
}
void SoundManager::ensureLoaded(ObjID sound) {
if (!_assets.contains(sound))
_assets[sound] = new SoundAsset(_container, sound);
}
SoundAsset::SoundAsset(Container *container, ObjID id) :
_container(container), _id(id), _length(0), _frequency(1) {
if (_container->getItemByteSize(_id) == 0)
warning("Trying to load an empty sound asset (%d).", _id);
Common::SeekableReadStream *stream = _container->getItem(_id);
stream->seek(5, SEEK_SET);
SoundType type = (SoundType)stream->readByte();
debugC(2, kMVDebugSound, "Decoding sound of type %x", type);
switch(type) {
case kSound10:
decode10(stream);
break;
case kSound12:
decode12(stream);
break;
case kSound18:
decode18(stream);
break;
case kSound1a:
decode1a(stream);
break;
case kSound44:
decode44(stream);
break;
case kSound78:
decode78(stream);
break;
case kSound7e:
decode7e(stream);
break;
default:
warning("Unrecognized sound type: %x", type);
break;
}
delete stream;
}
SoundAsset::~SoundAsset() {
debugC(3, kMVDebugSound, "~SoundAsset(%d)", _id);
}
void SoundAsset::play(Audio::Mixer *mixer, Audio::SoundHandle *soundHandle) {
if (_data.size() == 0) return;
Audio::AudioStream *sound = Audio::makeRawStream(&_data.front(), _length, _frequency, Audio::FLAG_UNSIGNED, DisposeAfterUse::NO);
mixer->playStream(Audio::Mixer::kPlainSoundType, soundHandle, sound);
}
uint32 SoundAsset::getPlayLength() {
// Transform to milliseconds
return _length * 1000 / _frequency;
}
void SoundAsset::decode10(Common::SeekableReadStream *stream) {
warning("Decode sound 0x10 untested");
Common::Array<byte> wavtable;
stream->seek(0x198, SEEK_SET);
for (uint i = 0; i < 16; i++) {
wavtable.push_back(stream->readByte());
}
_length = stream->readUint32BE() * 2;
//Unused
stream->readUint16BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
byte ch = 0;
for (uint i = 0; i < _length; i++) {
if (i & 1) ch >>= 4;
else ch = stream->readByte();
_data.push_back(wavtable[ch & 0xf]);
}
}
void SoundAsset::decode12(Common::SeekableReadStream *stream) {
warning("Decode sound 0x12 untested");
stream->seek(0xc, SEEK_SET);
uint32 repeat = stream->readUint16BE();
stream->seek(0x34, SEEK_SET);
uint32 base = stream->readUint16BE() + 0x34;
stream->seek(base, SEEK_SET);
_length = stream->readUint32BE() - 6;
stream->readUint16BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
stream->seek(0xe2, SEEK_SET);
// TODO: Possible source of bugs, the original just assigns the seek to the scales
uint32 scales = stream->pos() + 0xe2;
for (uint i = 0; i < repeat; i++) {
stream->seek(scales + i * 2, SEEK_SET);
uint32 scale = stream->readUint16BE();
stream->seek(base + 0xa, SEEK_SET);
for (uint j = 0; j < _length; j++) {
byte ch = stream->readByte();
if (ch & 0x80) {
ch -= 0x80;
uint32 env= ch * scale;
ch = (env >> 8) & 0xff;
if (ch & 0x80) ch = 0x7f;
ch += 0x80;
} else {
ch = (ch ^ 0xff) + 1;
ch -= 0x80;
uint32 env = ch * scale;
ch = (env >> 8) & 0xff;
if (ch & 0x80) ch = 0x7f;
ch += 0x80;
ch = (ch ^ 0xff) + 1;
}
_data.push_back(ch);
}
}
}
void SoundAsset::decode18(Common::SeekableReadStream *stream) {
warning("Decode sound 0x18 untested");
Common::Array<byte> wavtable;
stream->seek(0x252, SEEK_SET);
for (uint i = 0; i < 16; i++) {
wavtable.push_back(stream->readByte());
}
_length = stream->readUint32BE() * 2;
//Unused
stream->readUint16BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
byte ch = 0;
for (uint i = 0; i < _length; i++) {
if (i & 1) ch >>= 4;
else ch = stream->readByte();
_data.push_back(wavtable[ch & 0xf]);
}
}
void SoundAsset::decode1a(Common::SeekableReadStream *stream) {
warning("Decode sound 0x1a untested");
Common::Array<byte> wavtable;
stream->seek(0x220, SEEK_SET);
for (uint i = 0; i < 16; i++) {
wavtable.push_back(stream->readByte());
}
_length = stream->readUint32BE();
//Unused
stream->readUint16BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
byte ch = 0;
for (uint i = 0; i < _length; i++) {
if (i & 1) ch >>= 4;
else ch = stream->readByte();
_data.push_back(wavtable[ch & 0xf]);
}
}
void SoundAsset::decode44(Common::SeekableReadStream *stream) {
stream->seek(0x5e, SEEK_SET);
_length = stream->readUint32BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
for (uint i = 0; i < _length; i++) {
_data.push_back(stream->readByte());
}
}
void SoundAsset::decode78(Common::SeekableReadStream *stream) {
Common::Array<byte> wavtable;
stream->seek(0xba, SEEK_SET);
for (uint i = 0; i < 16; i++) {
wavtable.push_back(stream->readByte());
}
//Unused
stream->readUint32BE();
_length = stream->readUint32BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
byte ch = 0;
for (uint i = 0; i < _length; i++) {
if (i & 1) ch <<= 4;
else ch = stream->readByte();
_data.push_back(wavtable[(ch >> 4) & 0xf]);
}
}
void SoundAsset::decode7e(Common::SeekableReadStream *stream) {
Common::Array<byte> wavtable;
stream->seek(0xc2, SEEK_SET);
for (uint i = 0; i < 16; i++) {
wavtable.push_back(stream->readByte());
}
//Unused
stream->readUint32BE();
_length = stream->readUint32BE();
_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
uint32 last=0x80;
byte ch = 0;
for (uint i = 0; i < _length; i++) {
if (i & 1) ch <<= 4;
else ch = stream->readByte();
last += wavtable[(ch >> 4) & 0xf];
_data.push_back(last & 0xff);
}
}
} //End of namespace MacVenture