1 // fg_sound.hxx -- Sound class implementation
3 // Started by Erik Hofman, February 2002
4 // (Reuses some code from fg_fx.cxx created by David Megginson)
6 // Copyright (C) 2002 Curtis L. Olson - curt@flightgear.org
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <simgear/compiler.h>
26 #ifdef SG_HAVE_STD_INCLUDES
33 #include <simgear/debug/logstream.hxx>
35 #include <Main/fg_props.hxx>
37 #include "fg_sound.hxx"
40 // static double _fg_lin(double v) { return v; };
41 static double _fg_inv(double v) { return (v == 0) ? 1e99 : 1/v; };
42 static double _fg_abs(double v) { return (v >= 0) ? v : -v; };
43 static double _fg_sqrt(double v) { return (v < 0) ? sqrt(-v) : sqrt(v); };
44 static double _fg_log10(double v) { return (v < 1) ? 0 : log10(v); };
45 static double _fg_log(double v) { return (v < 1) ? 0 : log(v); };
46 // static double _fg_sqr(double v) { return pow(v, 2); };
47 // static double _fg_pow3(double v) { return pow(v, 3); };
60 // {"pow3", _fg_pow3},
88 FGSound::init(SGPropertyNode *node)
92 // set global sound properties
95 _name = node->getStringValue("name");
96 SG_LOG(SG_GENERAL, SG_INFO, "Loading sound information for: " << _name );
98 const char *mode_str = node->getStringValue("mode");
99 if ( !strcmp(mode_str, "looped") ) {
100 _mode = FGSound::LOOPED;
102 } else if ( !strcmp(mode_str, "in-transit") ) {
103 _mode = FGSound::IN_TRANSIT;
106 _mode = FGSound::ONCE;
108 if ( strcmp(mode_str, "") )
109 SG_LOG(SG_GENERAL,SG_INFO, " Unknown sound mode, default to 'once'");
112 _property = fgGetNode(node->getStringValue("property"), true);
113 SGPropertyNode *condition = node->getChild("condition");
114 if (condition != NULL)
115 _condition = fgReadCondition(condition);
117 if (!_property && !_condition)
118 SG_LOG(SG_GENERAL, SG_WARN,
119 " Neither a condition nor a property specified");
122 // set volume properties
126 vector<SGPropertyNode_ptr> kids = node->getChildren("volume");
127 for (i = 0; (i < kids.size()) && (i < FGSound::MAXPROP); i++) {
128 _snd_prop volume = {NULL, NULL, NULL, 1.0, 0.0, 0.0, 0.0, false};
130 if (strcmp(kids[i]->getStringValue("property"), ""))
131 volume.prop = fgGetNode(kids[i]->getStringValue("property"), true);
133 const char *intern_str = kids[i]->getStringValue("internal");
134 if (!strcmp(intern_str, "dt_play"))
135 volume.intern = &_dt_play;
136 else if (!strcmp(intern_str, "dt_stop"))
137 volume.intern = &_dt_stop;
139 if ((volume.factor = kids[i]->getDoubleValue("factor")) != 0.0)
140 if (volume.factor < 0.0) {
141 volume.factor = -volume.factor;
142 volume.subtract = true;
145 const char *type_str = kids[i]->getStringValue("type");
146 if ( strcmp(type_str, "") ) {
148 for (int j=0; __fg_snd_fn[j].fn; j++)
149 if ( !strcmp(type_str, __fg_snd_fn[j].name) ) {
150 volume.fn = __fg_snd_fn[j].fn;
155 SG_LOG(SG_GENERAL,SG_INFO,
156 " Unknown volume type, default to 'lin'");
159 volume.offset = kids[i]->getDoubleValue("offset");
161 if ((volume.min = kids[i]->getDoubleValue("min")) < 0.0)
162 SG_LOG( SG_GENERAL, SG_WARN,
163 "Volume minimum value below 0. Forced to 0.");
165 volume.max = kids[i]->getDoubleValue("max");
166 if (volume.max && (volume.max < volume.min) )
167 SG_LOG(SG_GENERAL,SG_ALERT,
168 " Volume maximum below minimum. Neglected.");
170 _volume.push_back(volume);
177 // set pitch properties
180 kids = node->getChildren("pitch");
181 for (i = 0; (i < kids.size()) && (i < FGSound::MAXPROP); i++) {
182 _snd_prop pitch = {NULL, NULL, NULL, 1.0, 1.0, 0.0, 0.0, false};
184 if (strcmp(kids[i]->getStringValue("property"), ""))
185 pitch.prop = fgGetNode(kids[i]->getStringValue("property"), true);
187 const char *intern_str = kids[i]->getStringValue("internal");
188 if (!strcmp(intern_str, "dt_play"))
189 pitch.intern = &_dt_play;
190 else if (!strcmp(intern_str, "dt_stop"))
191 pitch.intern = &_dt_stop;
193 if ((pitch.factor = kids[i]->getDoubleValue("factor")) != 0.0)
194 if (pitch.factor < 0.0) {
195 pitch.factor = -pitch.factor;
196 pitch.subtract = true;
199 const char *type_str = kids[i]->getStringValue("type");
200 if ( strcmp(type_str, "") ) {
202 for (int j=0; __fg_snd_fn[j].fn; j++)
203 if ( !strcmp(type_str, __fg_snd_fn[j].name) ) {
204 pitch.fn = __fg_snd_fn[j].fn;
209 SG_LOG(SG_GENERAL,SG_INFO,
210 " Unknown pitch type, default to 'lin'");
213 pitch.offset = kids[i]->getDoubleValue("offset");
215 if ((pitch.min = kids[i]->getDoubleValue("min")) < 0.0)
216 SG_LOG(SG_GENERAL,SG_WARN,
217 " Pitch minimum value below 0. Forced to 0.");
219 pitch.max = kids[i]->getDoubleValue("max");
220 if (pitch.max && (pitch.max < pitch.min) )
221 SG_LOG(SG_GENERAL,SG_ALERT,
222 " Pitch maximum below minimum. Neglected");
224 _pitch.push_back(pitch);
229 // Initialize the sample
231 _mgr = globals->get_soundmgr();
232 if ((_sample = _mgr->find(_name)) == NULL)
233 _sample = _mgr->add(_name, node->getStringValue("path"));
235 _sample->set_volume(v);
236 _sample->set_pitch(p);
250 FGSound::update (double dt)
252 double curr_value = 0.0;
255 // If the state changes to false, stop playing.
258 curr_value = _property->getDoubleValue();
260 if ( // Lisp, anyone?
261 (_condition && !_condition->test()) ||
262 (_property && !_condition &&
265 ( (_mode == FGSound::IN_TRANSIT) && (curr_value == _prev_value) )
272 if (_sample->is_playing()) {
273 SG_LOG(SG_GENERAL, SG_INFO, "Stopping audio after " << _dt_play
274 << " sec: " << _name );
275 _sample->stop( _mgr->get_scheduler() );
284 // If the mode is ONCE and the sound is still playing,
285 // we have nothing to do anymore.
287 if (_dt_play && (_mode == FGSound::ONCE))
291 // Cache current value and Update playing time
293 _prev_value = curr_value;
300 int max = _volume.size();
302 double volume_offset = 0.0;
304 for(i = 0; i < max; i++) {
308 v = _volume[i].prop->getDoubleValue();
310 else if (_volume[i].intern)
311 v = *_volume[i].intern;
314 v = _volume[i].fn(v);
316 v *= _volume[i].factor;
318 if (_volume[i].max && (v > _volume[i].max))
321 else if (v < _volume[i].min)
324 if (_volume[i].subtract) // Hack!
325 volume = _volume[i].offset - v;
328 volume_offset += _volume[i].offset;
338 double pitch_offset = 0.0;
340 for(i = 0; i < max; i++) {
344 p = _pitch[i].prop->getDoubleValue();
346 else if (_pitch[i].intern)
347 p = *_pitch[i].intern;
352 p *= _pitch[i].factor;
354 if (_pitch[i].max && (p > _pitch[i].max))
357 else if (p < _pitch[i].min)
360 if (_pitch[i].subtract) // Hack!
361 pitch = _pitch[i].offset - p;
364 pitch_offset += _pitch[i].offset;
370 // Change sample state
372 _sample->set_pitch( pitch_offset + pitch );
373 _sample->set_volume( volume_offset + volume );
377 // Do we need to start playing the sample?
383 if (_mode == FGSound::ONCE)
384 _sample->play(_mgr->get_scheduler(), false);
387 _sample->play(_mgr->get_scheduler(), true);
389 SG_LOG(SG_GENERAL, SG_INFO, "Starting audio playback for: " << _name);
390 SG_LOG(SG_GENERAL, SG_BULK,
391 "Playing " << ((_mode == ONCE) ? "once" : "looped"));