1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 /*
24 * This code is based on Labyrinth of Time code with assistance of
25 *
26 * Copyright (c) 1993 Terra Nova Development
27 * Copyright (c) 2004 The Wyrmkeep Entertainment Co.
28 *
29 */
30
31 #include "common/file.h"
32 #include "audio/audiostream.h"
33 #include "audio/decoders/raw.h"
34
35 #include "lab/lab.h"
36
37 #include "lab/anim.h"
38 #include "lab/eventman.h"
39 #include "lab/music.h"
40 #include "lab/resource.h"
41
42 namespace Lab {
43
44 #define CLOWNROOM 123
45 #define DIMROOM 80
46
Music(LabEngine * vm)47 Music::Music(LabEngine *vm) : _vm(vm) {
48 _musicFile = nullptr;
49 _storedPos = 0;
50 }
51
getSoundFlags()52 byte Music::getSoundFlags() {
53 byte soundFlags = Audio::FLAG_LITTLE_ENDIAN;
54 if (_vm->getPlatform() == Common::kPlatformWindows)
55 soundFlags |= Audio::FLAG_16BITS;
56 else if (_vm->getPlatform() == Common::kPlatformDOS)
57 soundFlags |= Audio::FLAG_UNSIGNED;
58
59 return soundFlags;
60 }
61
loadSoundEffect(const Common::String filename,bool loop,bool waitTillFinished)62 void Music::loadSoundEffect(const Common::String filename, bool loop, bool waitTillFinished) {
63 stopSoundEffect();
64
65 Common::File *file = _vm->_resource->openDataFile(filename, MKTAG('D', 'I', 'F', 'F'));
66 if (!file)
67 return;
68
69 _vm->_anim->_doBlack = false;
70
71 uint32 magicBytes = file->readUint32LE();
72 if (magicBytes != 1219009121) {
73 warning("readSound: Bad signature, skipping");
74 return;
75 }
76 uint32 soundTag = file->readUint32LE();
77 uint32 soundSize = file->readUint32LE();
78
79 if (soundTag != 0)
80 return;
81
82 file->skip(soundSize); // skip the header
83
84 while (soundTag != 65535) {
85 _vm->updateEvents();
86 soundTag = file->readUint32LE();
87 soundSize = file->readUint32LE() - 8;
88
89 if ((soundTag == 30) || (soundTag == 31)) {
90 if (waitTillFinished) {
91 while (isSoundEffectActive()) {
92 _vm->updateEvents();
93 _vm->waitTOF();
94 }
95 }
96
97 file->skip(4);
98
99 uint16 sampleRate = file->readUint16LE();
100 file->skip(2);
101 playSoundEffect(sampleRate, soundSize, loop, file);
102 } else if (soundTag == 65535) {
103 if (waitTillFinished) {
104 while (isSoundEffectActive()) {
105 _vm->updateEvents();
106 _vm->waitTOF();
107 }
108 }
109 } else
110 file->skip(soundSize);
111 }
112 }
113
playSoundEffect(uint16 sampleSpeed,uint32 length,bool loop,Common::File * dataFile)114 void Music::playSoundEffect(uint16 sampleSpeed, uint32 length, bool loop, Common::File *dataFile) {
115 stopSoundEffect();
116
117 // NOTE: We need to use malloc(), cause this will be freed with free()
118 // by the music code
119 byte *soundData = (byte *)malloc(length);
120 dataFile->read(soundData, length);
121
122 Audio::SeekableAudioStream *audioStream = Audio::makeRawStream((const byte *)soundData, length, MAX<uint16>(sampleSpeed, 4000), getSoundFlags());
123 _vm->_mixer->playStream(Audio::Mixer::kSFXSoundType, &_sfxHandle, new Audio::LoopingAudioStream(audioStream, (loop) ? 0 : 1));
124 }
125
stopSoundEffect()126 void Music::stopSoundEffect() {
127 if (isSoundEffectActive())
128 _vm->_mixer->stopHandle(_sfxHandle);
129 }
130
isSoundEffectActive() const131 bool Music::isSoundEffectActive() const {
132 return _vm->_mixer->isSoundHandleActive(_sfxHandle);
133 }
134
changeMusic(const Common::String filename,bool storeCurPos,bool seektoStoredPos)135 void Music::changeMusic(const Common::String filename, bool storeCurPos, bool seektoStoredPos) {
136 if (storeCurPos)
137 _storedPos = _musicFile->pos();
138
139 stopSoundEffect();
140 freeMusic();
141 _musicFile = _vm->_resource->openDataFile(filename);
142 if (seektoStoredPos)
143 _musicFile->seek(_storedPos);
144
145 Audio::SeekableAudioStream *audioStream = Audio::makeRawStream(_musicFile, 15000, getSoundFlags());
146 _vm->_mixer->playStream(Audio::Mixer::kMusicSoundType, &_musicHandle, new Audio::LoopingAudioStream(audioStream, 0));
147 }
148
resetMusic(bool seektoStoredPos)149 void Music::resetMusic(bool seektoStoredPos) {
150 if (_vm->getPlatform() != Common::kPlatformAmiga)
151 changeMusic("Music:BackGrou", false, seektoStoredPos);
152 else
153 changeMusic("Music:BackGround", false, seektoStoredPos);
154 }
155
checkRoomMusic(uint16 prevRoom,uint16 newRoom)156 void Music::checkRoomMusic(uint16 prevRoom, uint16 newRoom) {
157 if (newRoom == CLOWNROOM)
158 changeMusic("Music:Laugh", true, false);
159 else if (newRoom == DIMROOM)
160 changeMusic("Music:Rm81", true, false);
161 else if (prevRoom == CLOWNROOM || prevRoom == DIMROOM)
162 resetMusic(true);
163 }
164
freeMusic()165 void Music::freeMusic() {
166 _vm->_mixer->stopHandle(_musicHandle);
167 _vm->_mixer->stopHandle(_sfxHandle);
168 _musicFile = nullptr;
169 }
170
171 } // End of namespace Lab
172