1 // Description:
2 // Audio subsysytem.
3 //
4 // Copyright (C) 2003 Frank Becker
5 //
6 // This program is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU General Public License as published by the Free Software
8 // Foundation; either version 2 of the License, or (at your option) any later
9 // version.
10 //
11 // This program is distributed in the hope that it will be useful, but WITHOUT
12 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 // FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
14 //
15 #include <Audio.hpp>
16 #include <Trace.hpp>
17 #include <Config.hpp>
18 #include <ResourceManager.hpp>
19 #include <zrwops.hpp>
20 #include <SampleManager.hpp>
21 #include <Timer.hpp>
22
23 #include <sys/types.h>
24 #include <sys/stat.h>
25
26 #include "SDL.h"
27 #include "SDL_mixer.h"
28
Audio()29 Audio::Audio():
30 _sampleManager(0),
31 _soundTrack(0),
32 _playDefaultSoundtrack( true),
33 _playMusic( true),
34 _isPlaying( false)
35 {
36 XTRACE();
37
38 bool dummy;
39 //if config variables don't exist (upgrade, etc) update
40 if( ! ConfigS::instance()->getBoolean( "playMusic", dummy))
41 {
42 Value *v = new Value( _playMusic);
43 ConfigS::instance()->updateKeyword( "playMusic", v);
44 }
45 if( ! ConfigS::instance()->getBoolean(
46 "playDefaultSoundtrack", dummy))
47 {
48 Value *v = new Value( _playDefaultSoundtrack);
49 ConfigS::instance()->updateKeyword( "playDefaultSoundtrack", v);
50 }
51 }
52
~Audio()53 Audio::~Audio()
54 {
55 XTRACE();
56 LOG_INFO << "Audio shutdown..." << endl;
57
58 turnMusicOff();
59
60 Mix_CloseAudio();
61 delete _sampleManager;
62
63 SDL_QuitSubSystem(SDL_INIT_AUDIO);
64 }
65
loadMusic(const string & mod)66 void Audio::loadMusic( const string &mod)
67 {
68 XTRACE();
69 if( mod == "") return;
70
71 LOG_INFO << "Loading soundtrack...[" << mod << "]" << endl;
72
73 #if 0
74 //SDL_mixer doesn't have RWops support for MUS yet :(
75 if( !ResourceManagerS::instance()->selectResource( mod))
76 {
77 LOG_ERROR << "Music file [" << mod << "] not found." << endl;
78 return;
79 }
80
81 ziStream &infile = ResourceManagerS::instance()->getInputStream();
82 SDL_RWops *src = RWops_from_ziStream( infile);
83
84 _soundTrack = Mix_LoadMUS_RW(src);
85 SDL_RWclose( src);
86 #else
87 _soundTrack = Mix_LoadMUS( mod.c_str());
88 #endif
89
90 if( !_soundTrack)
91 {
92 LOG_ERROR << "Failed to load soundtrack: [" << mod << "]" << endl;
93 LOG_ERROR << SDL_GetError() << endl;
94 }
95 else
96 {
97 //loop soundtrack
98 Mix_PlayMusic( _soundTrack, -1);
99 _isPlaying = true;
100 }
101 }
102
init(void)103 bool Audio::init( void)
104 {
105 XTRACE();
106 LOG_INFO << "Initializing Audio..." << endl;
107
108 bool audio;
109 if( !ConfigS::instance()->getBoolean( "audio", audio))
110 {
111 audio = false;
112 }
113 if( audio)
114 {
115 if( SDL_InitSubSystem( SDL_INIT_AUDIO) < 0 )
116 {
117 LOG_ERROR << "Init Audio: failed # " << SDL_GetError() << endl;
118 return false;
119 }
120
121 if( Mix_OpenAudio(22050, AUDIO_S16, 1, 1024) < 0 )
122 {
123 LOG_ERROR << "Init Audio (Mixer): failed # "
124 << SDL_GetError() << endl;
125 return false;
126 }
127
128 _sampleManager = new SampleManager();
129
130 ConfigS::instance()->getBoolean( "playMusic", _playMusic);
131 ConfigS::instance()->getBoolean(
132 "playDefaultSoundtrack", _playDefaultSoundtrack);
133 startMusic();
134
135 LOG_INFO << "Audio ON." << endl;
136 }
137 else
138 {
139 LOG_INFO << "Audio OFF." << endl;
140 }
141
142 return true;
143 }
144
playSample(const string & sampleName)145 void Audio::playSample( const string &sampleName)
146 {
147 if( !_sampleManager) return;
148
149 Mix_Chunk *sample = _sampleManager->getSample( sampleName);
150 if( sample)
151 {
152 //any channel, no loop
153 Mix_PlayChannel(-1, sample, 0);
154 }
155 }
156
turnMusicOff(void)157 void Audio::turnMusicOff( void)
158 {
159 if( _isPlaying)
160 {
161 Mix_HaltMusic();
162 if( _soundTrack)
163 {
164 Mix_FreeMusic( _soundTrack);
165 _soundTrack = 0;
166 }
167 _isPlaying = false;
168 }
169 }
170
startMusic(void)171 void Audio::startMusic( void)
172 {
173 if( _playMusic)
174 {
175 string soundtrack = "";
176
177 if( _playDefaultSoundtrack)
178 {
179 //look in developer file tree first
180 soundtrack = string("../data/music/TODO.ogg");
181
182 struct stat statInfo;
183 if( stat( soundtrack.c_str(), &statInfo) == -1)
184 {
185 //try global
186 soundtrack = DATA_DIR+string("TODO.ogg");
187 }
188 }
189 else
190 {
191 ConfigS::instance()->getString( "soundtrack", soundtrack);
192 }
193
194 turnMusicOff();
195 loadMusic( soundtrack);
196 }
197 else
198 {
199 turnMusicOff();
200 }
201 }
202
updateSettings(void)203 void Audio::updateSettings( void)
204 {
205 bool oldPlayMusic = _playMusic;
206 bool oldPlayDefaultSoundtrack = _playDefaultSoundtrack;
207
208 ConfigS::instance()->getBoolean( "playMusic", _playMusic);
209 ConfigS::instance()->getBoolean(
210 "playDefaultSoundtrack", _playDefaultSoundtrack);
211
212 if( (oldPlayMusic == _playMusic) &&
213 (oldPlayDefaultSoundtrack == _playDefaultSoundtrack))
214 {
215 //no changes...
216 return;
217 }
218
219 startMusic();
220 }
221
update(void)222 bool Audio::update( void)
223 {
224 if( !_sampleManager) return true;
225
226 static float nextTime = Timer::getTime()+0.5;
227 float thisTime = Timer::getTime();
228 if( thisTime > nextTime)
229 {
230 updateSettings();
231 nextTime = thisTime+0.5;
232 }
233
234 return true;
235 }
236