mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-22 09:49:11 +00:00
261 lines
7.2 KiB
C++
261 lines
7.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "macventure/sound.h"
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#include "audio/mixer.h"
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#include "audio/audiostream.h"
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#include "audio/decoders/raw.h"
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namespace MacVenture {
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// SoundManager
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SoundManager::SoundManager(MacVentureEngine *engine, Audio::Mixer *mixer) {
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_container = NULL;
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Common::String filename = engine->getFilePath(kSoundPathID);
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_container = new Container(filename);
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_mixer = mixer;
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debugC(1, kMVDebugSound, "Created sound manager with file %s", filename.c_str());
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}
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SoundManager::~SoundManager(){
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if (_container)
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delete _container;
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Common::HashMap<ObjID, SoundAsset*>::iterator it;
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Common::HashMap<ObjID, SoundAsset*>::iterator end = _assets.end();
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for (it = _assets.begin(); it != end; it++) {
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delete it->_value;
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}
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}
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uint32 SoundManager::playSound(ObjID sound) {
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ensureLoaded(sound);
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_assets[sound]->play(_mixer, &_handle);
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return _assets[sound]->getPlayLength();
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}
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void SoundManager::ensureLoaded(ObjID sound) {
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if (!_assets.contains(sound))
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_assets[sound] = new SoundAsset(_container, sound);
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}
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SoundAsset::SoundAsset(Container *container, ObjID id) :
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_container(container), _id(id), _length(0), _frequency(1) {
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if (_container->getItemByteSize(_id) == 0)
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warning("Trying to load an empty sound asset (%d).", _id);
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Common::SeekableReadStream *stream = _container->getItem(_id);
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stream->seek(5, SEEK_SET);
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SoundType type = (SoundType)stream->readByte();
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debugC(2, kMVDebugSound, "Decoding sound of type %x", type);
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switch(type) {
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case kSound10:
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decode10(stream);
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break;
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case kSound12:
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decode12(stream);
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break;
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case kSound18:
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decode18(stream);
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break;
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case kSound1a:
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decode1a(stream);
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break;
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case kSound44:
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decode44(stream);
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break;
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case kSound78:
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decode78(stream);
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break;
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case kSound7e:
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decode7e(stream);
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break;
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default:
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warning("Unrecognized sound type: %x", type);
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break;
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}
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delete stream;
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}
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SoundAsset::~SoundAsset() {
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debugC(3, kMVDebugSound, "~SoundAsset(%d)", _id);
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}
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void SoundAsset::play(Audio::Mixer *mixer, Audio::SoundHandle *soundHandle) {
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if (_data.size() == 0) return;
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Audio::AudioStream *sound = Audio::makeRawStream(&_data.front(), _length, _frequency, Audio::FLAG_UNSIGNED, DisposeAfterUse::NO);
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mixer->playStream(Audio::Mixer::kPlainSoundType, soundHandle, sound);
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}
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uint32 SoundAsset::getPlayLength() {
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// Transform to milliseconds
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return _length * 1000 / _frequency;
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}
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void SoundAsset::decode10(Common::SeekableReadStream *stream) {
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warning("Decode sound 0x10 untested");
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Common::Array<byte> wavtable;
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stream->seek(0x198, SEEK_SET);
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for (uint i = 0; i < 16; i++) {
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wavtable.push_back(stream->readByte());
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}
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_length = stream->readUint32BE() * 2;
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//Unused
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stream->readUint16BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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byte ch = 0;
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for (uint i = 0; i < _length; i++) {
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if (i & 1) ch >>= 4;
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else ch = stream->readByte();
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_data.push_back(wavtable[ch & 0xf]);
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}
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}
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void SoundAsset::decode12(Common::SeekableReadStream *stream) {
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warning("Decode sound 0x12 untested");
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stream->seek(0xc, SEEK_SET);
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uint32 repeat = stream->readUint16BE();
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stream->seek(0x34, SEEK_SET);
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uint32 base = stream->readUint16BE() + 0x34;
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stream->seek(base, SEEK_SET);
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_length = stream->readUint32BE() - 6;
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stream->readUint16BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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stream->seek(0xe2, SEEK_SET);
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// TODO: Possible source of bugs, the original just assigns the seek to the scales
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uint32 scales = stream->pos() + 0xe2;
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for (uint i = 0; i < repeat; i++) {
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stream->seek(scales + i * 2, SEEK_SET);
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uint32 scale = stream->readUint16BE();
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stream->seek(base + 0xa, SEEK_SET);
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for (uint j = 0; j < _length; j++) {
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byte ch = stream->readByte();
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if (ch & 0x80) {
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ch -= 0x80;
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uint32 env= ch * scale;
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ch = (env >> 8) & 0xff;
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if (ch & 0x80) ch = 0x7f;
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ch += 0x80;
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} else {
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ch = (ch ^ 0xff) + 1;
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ch -= 0x80;
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uint32 env = ch * scale;
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ch = (env >> 8) & 0xff;
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if (ch & 0x80) ch = 0x7f;
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ch += 0x80;
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ch = (ch ^ 0xff) + 1;
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}
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_data.push_back(ch);
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}
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}
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}
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void SoundAsset::decode18(Common::SeekableReadStream *stream) {
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warning("Decode sound 0x18 untested");
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Common::Array<byte> wavtable;
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stream->seek(0x252, SEEK_SET);
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for (uint i = 0; i < 16; i++) {
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wavtable.push_back(stream->readByte());
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}
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_length = stream->readUint32BE() * 2;
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//Unused
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stream->readUint16BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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byte ch = 0;
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for (uint i = 0; i < _length; i++) {
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if (i & 1) ch >>= 4;
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else ch = stream->readByte();
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_data.push_back(wavtable[ch & 0xf]);
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}
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}
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void SoundAsset::decode1a(Common::SeekableReadStream *stream) {
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warning("Decode sound 0x1a untested");
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Common::Array<byte> wavtable;
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stream->seek(0x220, SEEK_SET);
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for (uint i = 0; i < 16; i++) {
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wavtable.push_back(stream->readByte());
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}
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_length = stream->readUint32BE();
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//Unused
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stream->readUint16BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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byte ch = 0;
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for (uint i = 0; i < _length; i++) {
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if (i & 1) ch >>= 4;
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else ch = stream->readByte();
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_data.push_back(wavtable[ch & 0xf]);
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}
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}
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void SoundAsset::decode44(Common::SeekableReadStream *stream) {
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stream->seek(0x5e, SEEK_SET);
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_length = stream->readUint32BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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for (uint i = 0; i < _length; i++) {
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_data.push_back(stream->readByte());
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}
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}
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void SoundAsset::decode78(Common::SeekableReadStream *stream) {
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Common::Array<byte> wavtable;
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stream->seek(0xba, SEEK_SET);
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for (uint i = 0; i < 16; i++) {
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wavtable.push_back(stream->readByte());
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}
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//Unused
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stream->readUint32BE();
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_length = stream->readUint32BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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byte ch = 0;
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for (uint i = 0; i < _length; i++) {
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if (i & 1) ch <<= 4;
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else ch = stream->readByte();
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_data.push_back(wavtable[(ch >> 4) & 0xf]);
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}
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}
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void SoundAsset::decode7e(Common::SeekableReadStream *stream) {
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Common::Array<byte> wavtable;
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stream->seek(0xc2, SEEK_SET);
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for (uint i = 0; i < 16; i++) {
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wavtable.push_back(stream->readByte());
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}
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//Unused
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stream->readUint32BE();
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_length = stream->readUint32BE();
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_frequency = (stream->readUint32BE() * 22100 / 0x10000) | 0;
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uint32 last=0x80;
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byte ch = 0;
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for (uint i = 0; i < _length; i++) {
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if (i & 1) ch <<= 4;
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else ch = stream->readByte();
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last += wavtable[(ch >> 4) & 0xf];
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_data.push_back(last & 0xff);
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}
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}
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} //End of namespace MacVenture
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