1 // sound.cxx -- 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 - http://www.flightgear.org/~curt
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 # include <simgear_config.h>
28 #include <simgear/compiler.h>
32 #include <simgear/debug/logstream.hxx>
33 #include <simgear/props/condition.hxx>
34 #include <simgear/math/SGMath.hxx>
37 #include "xmlsound.hxx"
40 // static double _snd_lin(double v) { return v; }
41 static double _snd_inv(double v) { return (v == 0) ? 1e99 : 1/v; }
42 static double _snd_abs(double v) { return (v >= 0) ? v : -v; }
43 static double _snd_sqrt(double v) { return sqrt(fabs(v)); }
44 static double _snd_log10(double v) { return log10(fabs(v)); }
45 static double _snd_log(double v) { return log(fabs(v)); }
46 // static double _snd_sqr(double v) { return v*v; }
47 // static double _snd_pow3(double v) { return v*v*v; }
61 SGXmlSound::SGXmlSound()
65 _mode(SGXmlSound::ONCE),
74 SGXmlSound::~SGXmlSound()
84 SGXmlSound::init(SGPropertyNode *root, SGPropertyNode *node,
85 SGSampleGroup *sgrp, const string &path)
89 // set global sound properties
92 _name = node->getStringValue("name", "");
93 SG_LOG(SG_GENERAL, SG_DEBUG, "Loading sound information for: " << _name );
95 const char *mode_str = node->getStringValue("mode", "");
96 if ( !strcmp(mode_str, "looped") ) {
97 _mode = SGXmlSound::LOOPED;
99 } else if ( !strcmp(mode_str, "in-transit") ) {
100 _mode = SGXmlSound::IN_TRANSIT;
103 _mode = SGXmlSound::ONCE;
106 _property = root->getNode(node->getStringValue("property", ""), true);
107 SGPropertyNode *condition = node->getChild("condition");
108 if (condition != NULL)
109 _condition = sgReadCondition(root, condition);
111 if (!_property && !_condition)
112 SG_LOG(SG_GENERAL, SG_WARN,
113 " Neither a condition nor a property specified");
115 _delay = node->getDoubleValue("delay-sec", 0.0);
118 // set volume properties
122 std::vector<SGPropertyNode_ptr> kids = node->getChildren("volume");
123 for (i = 0; (i < kids.size()) && (i < SGXmlSound::MAXPROP); i++) {
124 _snd_prop volume = {NULL, NULL, NULL, 1.0, 0.0, 0.0, 0.0, false};
126 if (strcmp(kids[i]->getStringValue("property"), ""))
127 volume.prop = root->getNode(kids[i]->getStringValue("property", ""), true);
129 const char *intern_str = kids[i]->getStringValue("internal", "");
130 if (!strcmp(intern_str, "dt_play"))
131 volume.intern = &_dt_play;
132 else if (!strcmp(intern_str, "dt_stop"))
133 volume.intern = &_dt_stop;
135 if ((volume.factor = kids[i]->getDoubleValue("factor", 1.0)) != 0.0)
136 if (volume.factor < 0.0) {
137 volume.factor = -volume.factor;
138 volume.subtract = true;
141 const char *type_str = kids[i]->getStringValue("type", "");
142 if ( strcmp(type_str, "") ) {
144 for (int j=0; __sound_fn[j].fn; j++)
145 if ( !strcmp(type_str, __sound_fn[j].name) ) {
146 volume.fn = __sound_fn[j].fn;
151 SG_LOG(SG_GENERAL,SG_INFO,
152 " Unknown volume type, default to 'lin'");
155 volume.offset = kids[i]->getDoubleValue("offset", 0.0);
157 if ((volume.min = kids[i]->getDoubleValue("min", 0.0)) < 0.0)
158 SG_LOG( SG_GENERAL, SG_WARN,
159 "Volume minimum value below 0. Forced to 0.");
161 volume.max = kids[i]->getDoubleValue("max", 0.0);
162 if (volume.max && (volume.max < volume.min) )
163 SG_LOG(SG_GENERAL,SG_ALERT,
164 " Volume maximum below minimum. Neglected.");
166 _volume.push_back(volume);
171 float reference_dist = node->getDoubleValue("reference-dist", 500.0);
172 float max_dist = node->getDoubleValue("max-dist", 3000.0);
175 // set pitch properties
178 kids = node->getChildren("pitch");
179 for (i = 0; (i < kids.size()) && (i < SGXmlSound::MAXPROP); i++) {
180 _snd_prop pitch = {NULL, NULL, NULL, 1.0, 1.0, 0.0, 0.0, false};
182 if (strcmp(kids[i]->getStringValue("property", ""), ""))
183 pitch.prop = root->getNode(kids[i]->getStringValue("property", ""), true);
185 const char *intern_str = kids[i]->getStringValue("internal", "");
186 if (!strcmp(intern_str, "dt_play"))
187 pitch.intern = &_dt_play;
188 else if (!strcmp(intern_str, "dt_stop"))
189 pitch.intern = &_dt_stop;
191 if ((pitch.factor = kids[i]->getDoubleValue("factor", 1.0)) != 0.0)
192 if (pitch.factor < 0.0) {
193 pitch.factor = -pitch.factor;
194 pitch.subtract = true;
197 const char *type_str = kids[i]->getStringValue("type", "");
198 if ( strcmp(type_str, "") ) {
200 for (int j=0; __sound_fn[j].fn; j++)
201 if ( !strcmp(type_str, __sound_fn[j].name) ) {
202 pitch.fn = __sound_fn[j].fn;
207 SG_LOG(SG_GENERAL,SG_INFO,
208 " Unknown pitch type, default to 'lin'");
211 pitch.offset = kids[i]->getDoubleValue("offset", 1.0);
213 if ((pitch.min = kids[i]->getDoubleValue("min", 0.0)) < 0.0)
214 SG_LOG(SG_GENERAL,SG_WARN,
215 " Pitch minimum value below 0. Forced to 0.");
217 pitch.max = kids[i]->getDoubleValue("max", 0.0);
218 if (pitch.max && (pitch.max < pitch.min) )
219 SG_LOG(SG_GENERAL,SG_ALERT,
220 " Pitch maximum below minimum. Neglected");
222 _pitch.push_back(pitch);
229 SGVec3f offset_pos = SGVec3f::zeros();
230 SGPropertyNode_ptr prop = node->getChild("position");
231 if ( prop != NULL ) {
232 offset_pos[0] = prop->getDoubleValue("x", 0.0);
233 offset_pos[1] = -prop->getDoubleValue("y", 0.0);
234 offset_pos[2] = prop->getDoubleValue("z", 0.0);
240 SGVec3d dir = SGVec3d::zeros();
243 float outer_gain = 0.0;
244 prop = node->getChild("orientation");
245 if ( prop != NULL ) {
246 dir = SGVec3d(-prop->getDoubleValue("x", 0.0),
247 -prop->getDoubleValue("y", 0.0),
248 -prop->getDoubleValue("z", 0.0));
249 inner = prop->getDoubleValue("inner-angle", 360.0);
250 outer = prop->getDoubleValue("outer-angle", 360.0);
251 outer_gain = prop->getDoubleValue("outer-gain", 0.0);
255 // Initialize the sample
258 _sample = new SGSoundSample( path.c_str(), node->getStringValue("path", ""));
259 _sample->set_relative_position( offset_pos );
260 _sample->set_direction( dir );
261 _sample->set_audio_cone( inner, outer, outer_gain );
262 _sample->set_reference_dist( reference_dist );
263 _sample->set_max_dist( max_dist );
264 _sample->set_volume( v );
265 _sample->set_pitch( p );
266 _sgrp->add( _sample, _name );
270 SGXmlSound::update (double dt)
272 double curr_value = 0.0;
275 // If the state changes to false, stop playing.
278 curr_value = _property->getDoubleValue();
280 // If a condition is defined, test whether it is FALSE,
282 // if a property is defined then test if it's value is FALSE
283 // or if the mode is IN_TRANSIT then
284 // test whether the current value matches the previous value.
285 if ( // Lisp, anyone?
286 (_condition && !_condition->test()) ||
287 (!_condition && _property &&
290 ( (_mode == SGXmlSound::IN_TRANSIT) && (curr_value == _prev_value) )
295 if ((_mode != SGXmlSound::IN_TRANSIT) || (_stopping > MAX_TRANSIT_TIME))
297 if (_sample->is_playing()) {
298 SG_LOG(SG_GENERAL, SG_DEBUG, "Stopping audio after " << _dt_play
299 << " sec: " << _name );
315 // mode is ONCE and the sound is still playing?
317 if (_active && (_mode == SGXmlSound::ONCE)) {
319 if (!_sample->is_playing()) {
329 // Update the playing time, cache the current value and
330 // clear the delay timer.
333 _prev_value = curr_value;
337 if (_dt_play < _delay)
344 int max = _volume.size();
346 double volume_offset = 0.0;
348 for(i = 0; i < max; i++) {
352 v = _volume[i].prop->getDoubleValue();
354 else if (_volume[i].intern)
355 v = *_volume[i].intern;
358 v = _volume[i].fn(v);
360 v *= _volume[i].factor;
362 if (_volume[i].max && (v > _volume[i].max))
365 else if (v < _volume[i].min)
368 if (_volume[i].subtract) // Hack!
369 volume = _volume[i].offset - v;
372 volume_offset += _volume[i].offset;
382 double pitch_offset = 0.0;
384 for(i = 0; i < max; i++) {
388 p = _pitch[i].prop->getDoubleValue();
390 else if (_pitch[i].intern)
391 p = *_pitch[i].intern;
396 p *= _pitch[i].factor;
398 if (_pitch[i].max && (p > _pitch[i].max))
401 else if (p < _pitch[i].min)
404 if (_pitch[i].subtract) // Hack!
405 pitch = _pitch[i].offset - p;
408 pitch_offset += _pitch[i].offset;
414 // Change sample state
417 double vol = volume_offset + volume;
419 SG_LOG(SG_GENERAL, SG_DEBUG, "Sound volume too large for '"
420 << _name << "': " << vol << " -> clipping to 1.0");
423 _sample->set_volume(vol);
424 _sample->set_pitch( pitch_offset + pitch );
428 // Do we need to start playing the sample?
432 if (_mode == SGXmlSound::ONCE)
433 _sample->play(false);
438 SG_LOG(SG_GENERAL, SG_DEBUG, "Playing audio after " << _dt_stop
439 << " sec: " << _name);
440 SG_LOG(SG_GENERAL, SG_DEBUG,
441 "Playing " << ((_mode == ONCE) ? "once" : "looped"));