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/* 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"
namespace MacVenture {
SoundAsset::SoundAsset(Container *container, ObjID id) :
_container(container), _id(id) {
//TODO Decode the sound
if (_container->getItemByteSize(_id) == 0)
warning("Trying to load an empty sound asset.");
Common::SeekableReadStream *stream = _container->getItem(_id);
stream->seek(5, SEEK_SET);
SoundType type = (SoundType)stream->readByte();
debug(2, "Decoding sound of type %x", type);
switch(type) {
case kSound10:
decode10(stream);
break;
case kSound7e:
decode7e(stream);
break;
default:
warning("Unrecognized sound type: %x", type);
}
delete stream;
}
SoundAsset::~SoundAsset() {}
void SoundAsset::play() {
//TODO: Play song
warning("SoundAsset::play() not yet implemented");
}
uint32 SoundAsset::getPlayLength() {
return _length / _frequency;
}
void SoundAsset::decode10(Common::SeekableReadStream *stream) {
Common::Array<byte> wavtable;
stream->seek(0x198, SEEK_SET);
for (int 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 (int i = 0; i < _length; i++) {
if (i & 1) ch >>= 4;
else ch = stream->readByte();
_data.push_back(wavtable[ch & 0xf]);
}
}
void SoundAsset::decode7e(Common::SeekableReadStream *stream) {
Common::Array<byte> wavtable;
stream->seek(0xc2, SEEK_SET);
for (int 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 (int i = 0; i < _length; i++) {
if (i & 1) ch <<= 4;
else ch = stream->readByte();
last += wavtable[(ch >> 4) & 0xf];
_data.push_back(last & 0xff);
}
}
// SoundManager
SoundManager::SoundManager(MacVentureEngine *engine) {
_container = nullptr;
Common::String filename = engine->getFilePath(kSoundPathID);
_container = new Container(filename);
debug(1, "Created sound manager with file %s", filename.c_str());
}
SoundManager::~SoundManager(){
if (_container)
delete _container;
Common::HashMap<ObjID, SoundAsset*>::iterator it;
for (it = _assets.begin(); it != _assets.end(); it++) {
delete it->_value;
}
}
uint32 SoundManager::playSound(ObjID sound) {
ensureLoaded(sound);
_assets[sound]->play();
return _assets[sound]->getPlayLength();
}
void SoundManager::ensureLoaded(ObjID sound) {
if (!_assets.contains(sound))
_assets[sound] = new SoundAsset(_container, sound);
}
} //End of namespace MacVenture
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