1 // sample_group.cxx -- Manage a group of samples relative to a base position
3 // Written for the new SoundSystem by Erik Hofman, October 2009
5 // Copyright (C) 2009 Erik Hofman <erik@ehofman.com>
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
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 Foundation,
19 // Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
24 # include <simgear_config.h>
27 #include <simgear/compiler.h>
29 #include "soundmgr_openal.hxx"
30 #include "sample_group.hxx"
32 bool isNaN(float *v) {
33 return (isnan(v[0]) || isnan(v[1]) || isnan(v[2]));
36 SGSampleGroup::SGSampleGroup () :
43 _tied_to_listener(false),
44 _velocity(SGVec3d::zeros()),
45 _orientation(SGQuatd::zeros())
50 SGSampleGroup::SGSampleGroup ( SGSoundMgr *smgr, const string &refname ) :
57 _tied_to_listener(false),
58 _velocity(SGVec3d::zeros()),
59 _orientation(SGQuatd::zeros())
61 _smgr->add(this, refname);
65 SGSampleGroup::~SGSampleGroup ()
69 sample_map_iterator sample_current = _samples.begin();
70 sample_map_iterator sample_end = _samples.end();
71 for ( ; sample_current != sample_end; ++sample_current ) {
72 SGSoundSample *sample = sample_current->second;
74 if ( sample->is_valid_source() && sample->is_playing() ) {
75 sample->no_valid_source();
76 _smgr->release_source( sample->get_source() );
77 _smgr->release_buffer( sample );
84 void SGSampleGroup::update( double dt ) {
86 if ( !_active || _pause ) return;
88 testForALError("start of update!!\n");
90 // Delete any OpenAL buffers that might still be in use.
91 unsigned int size = _removed_samples.size();
92 for (unsigned int i=0; i<size; ) {
93 SGSoundSample *sample = _removed_samples[i];
94 ALint result = AL_STOPPED;
96 if ( sample->is_valid_source() ) {
97 int source = sample->get_source();
99 alGetSourcei( source, AL_SOURCE_STATE, &result );
100 if ( sample->is_looping() ) {
101 if ( result != AL_STOPPED ) {
102 alSourceStop( source );
103 alGetSourcei( source, AL_SOURCE_STATE, &result );
106 if ( result == AL_STOPPED ) {
107 sample->no_valid_source();
108 _smgr->release_source( source );
112 if ( result == AL_STOPPED ) {
114 if (( !sample->is_queue() )&&
115 (sample->is_valid_buffer()))
117 _smgr->release_buffer(sample);
119 _removed_samples.erase( _removed_samples.begin()+i );
126 // Update the position and orientation information for all samples.
127 if ( _changed || _smgr->has_changed() ) {
128 update_pos_and_orientation();
132 sample_map_iterator sample_current = _samples.begin();
133 sample_map_iterator sample_end = _samples.end();
134 for ( ; sample_current != sample_end; ++sample_current ) {
135 SGSoundSample *sample = sample_current->second;
137 if ( !sample->is_valid_source() && sample->is_playing() && !sample->test_out_of_range()) {
139 // a request to start playing a sound has been filed.
141 ALuint source = _smgr->request_source();
142 if (alIsSource(source) == AL_TRUE )
144 ALboolean looping = sample->is_looping() ? AL_TRUE : AL_FALSE;
145 if ( sample->is_queue() )
147 sample->set_source( source );
148 update_sample_config( sample );
150 alSourcef( source, AL_ROLLOFF_FACTOR, 0.3 );
151 alSourcei( source, AL_LOOPING, looping );
152 alSourcei( source, AL_SOURCE_RELATIVE, AL_FALSE );
153 alSourcePlay( source );
154 testForALError("sample play");
158 ALuint buffer = _smgr->request_buffer(sample);
159 if (buffer == SGSoundMgr::FAILED_BUFFER ||
160 buffer == SGSoundMgr::NO_BUFFER)
162 _smgr->release_source(source);
166 // start playing the sample
167 buffer = sample->get_buffer();
168 if ( alIsBuffer(buffer) == AL_TRUE )
170 alSourcei( source, AL_BUFFER, buffer );
171 testForALError("assign buffer to source");
173 sample->set_source( source );
174 update_sample_config( sample );
176 alSourcei( source, AL_LOOPING, looping );
177 alSourcef( source, AL_ROLLOFF_FACTOR, 0.3 );
178 alSourcei( source, AL_SOURCE_RELATIVE, AL_FALSE );
179 alSourcePlay( source );
180 testForALError("sample play");
182 SG_LOG( SG_SOUND, SG_ALERT, "No such buffer!");
186 } else if ( sample->is_valid_source() ) {
187 // check if the sound has stopped by itself
189 unsigned int source = sample->get_source();
192 alGetSourcei( source, AL_SOURCE_STATE, &result );
193 if ( result == AL_STOPPED ) {
194 // sample is stopped because it wasn't looping
196 sample->no_valid_source();
197 _smgr->release_source( source );
198 _smgr->release_buffer( sample );
199 remove( sample->get_sample_name() );
202 if ( sample->has_changed() ) {
203 if ( !sample->is_playing() ) {
204 // a request to stop playing the sound has been filed.
206 sample->no_valid_source();
207 _smgr->release_source( sample->get_source() );
208 } else if ( _smgr->has_changed() ) {
209 update_sample_config( sample );
214 testForALError("update");
218 // add a sound effect, return true if successful
219 bool SGSampleGroup::add( SGSharedPtr<SGSoundSample> sound, const string& refname ) {
221 sample_map_iterator sample_it = _samples.find( refname );
222 if ( sample_it != _samples.end() ) {
223 // sample name already exists
227 _samples[refname] = sound;
232 // remove a sound effect, return true if successful
233 bool SGSampleGroup::remove( const string &refname ) {
235 sample_map_iterator sample_it = _samples.find( refname );
236 if ( sample_it == _samples.end() ) {
237 // sample was not found
241 if ( sample_it->second->is_valid_buffer() )
242 _removed_samples.push_back( sample_it->second );
244 _samples.erase( sample_it );
250 // return true of the specified sound exists in the sound manager system
251 bool SGSampleGroup::exists( const string &refname ) {
252 sample_map_iterator sample_it = _samples.find( refname );
253 if ( sample_it == _samples.end() ) {
254 // sample was not found
262 // return a pointer to the SGSoundSample if the specified sound exists
263 // in the sound manager system, otherwise return NULL
264 SGSoundSample *SGSampleGroup::find( const string &refname ) {
265 sample_map_iterator sample_it = _samples.find( refname );
266 if ( sample_it == _samples.end() ) {
267 // sample was not found
271 return sample_it->second;
276 SGSampleGroup::stop ()
279 sample_map_iterator sample_current = _samples.begin();
280 sample_map_iterator sample_end = _samples.end();
281 for ( ; sample_current != sample_end; ++sample_current ) {
282 SGSoundSample *sample = sample_current->second;
284 if ( sample->is_valid_source() ) {
285 ALint source = sample->get_source();
286 if ( sample->is_playing() ) {
287 alSourceStop( source );
289 _smgr->release_source( source );
290 sample->no_valid_source();
293 if ( sample->is_valid_buffer() ) {
294 _smgr->release_buffer( sample );
295 sample->no_valid_buffer();
298 testForALError("stop");
301 // stop playing all associated samples
303 SGSampleGroup::suspend ()
305 if (_active && _pause == false) {
307 sample_map_iterator sample_current = _samples.begin();
308 sample_map_iterator sample_end = _samples.end();
309 for ( ; sample_current != sample_end; ++sample_current ) {
310 SGSoundSample *sample = sample_current->second;
312 if ( sample->is_valid_source() && sample->is_playing() ) {
313 alSourcePause( sample->get_source() );
316 testForALError("suspend");
320 // resume playing all associated samples
322 SGSampleGroup::resume ()
324 if (_active && _pause == true) {
325 sample_map_iterator sample_current = _samples.begin();
326 sample_map_iterator sample_end = _samples.end();
327 for ( ; sample_current != sample_end; ++sample_current ) {
328 SGSoundSample *sample = sample_current->second;
330 if ( sample->is_valid_source() && sample->is_playing() ) {
331 alSourcePlay( sample->get_source() );
334 testForALError("resume");
340 // tell the scheduler to play the indexed sample in a continuous loop
341 bool SGSampleGroup::play( const string &refname, bool looping = false ) {
342 SGSoundSample *sample = find( refname );
344 if ( sample == NULL ) {
348 sample->play( looping );
353 // return true of the specified sound is currently being played
354 bool SGSampleGroup::is_playing( const string& refname ) {
355 SGSoundSample *sample = find( refname );
357 if ( sample == NULL ) {
361 return ( sample->is_playing() ) ? true : false;
364 // immediate stop playing the sound
365 bool SGSampleGroup::stop( const string& refname ) {
366 SGSoundSample *sample = find( refname );
368 if ( sample == NULL ) {
376 void SGSampleGroup::set_volume( float vol )
378 if (vol > _volume*1.01 || vol < _volume*0.99) {
380 if (_volume < 0.0) _volume = 0.0;
381 if (_volume > 1.0) _volume = 1.0;
386 // set the source position and orientation of all managed sounds
387 void SGSampleGroup::update_pos_and_orientation() {
389 SGVec3d position = SGVec3d::fromGeod(_base_pos) - _smgr->get_position();
390 SGQuatd hlOr = SGQuatd::fromLonLat(_base_pos);
391 SGQuatd ec2body = hlOr*_orientation;
393 SGVec3f velocity = SGVec3f::zeros();
394 if ( _velocity[0] || _velocity[1] || _velocity[2] ) {
395 velocity = toVec3f( hlOr.backTransform(_velocity*SG_FEET_TO_METER) );
398 sample_map_iterator sample_current = _samples.begin();
399 sample_map_iterator sample_end = _samples.end();
400 for ( ; sample_current != sample_end; ++sample_current ) {
401 SGSoundSample *sample = sample_current->second;
402 sample->set_master_volume( _volume );
403 sample->set_orientation( _orientation );
404 sample->set_rotation( ec2body );
405 sample->set_position( position );
406 sample->set_velocity( velocity );
408 // Test if a sample is farther away than max distance, if so
409 // stop the sound playback and free it's source.
410 if (!_tied_to_listener) {
411 float max2 = sample->get_max_dist() * sample->get_max_dist();
412 float dist2 = position[0]*position[0]
413 + position[1]*position[1] + position[2]*position[2];
414 if ((dist2 > max2) && !sample->test_out_of_range()) {
415 sample->set_out_of_range(true);
416 } else if ((dist2 < max2) && sample->test_out_of_range()) {
417 sample->set_out_of_range(false);
423 void SGSampleGroup::update_sample_config( SGSoundSample *sample ) {
424 SGVec3f orientation, velocity;
427 if ( _tied_to_listener ) {
428 orientation = _smgr->get_direction();
429 position = SGVec3d::zeros();
430 velocity = _smgr->get_velocity();
432 sample->update_pos_and_orientation();
433 orientation = sample->get_orientation();
434 position = sample->get_position();
435 velocity = sample->get_velocity();
438 if (_smgr->bad_doppler_effect()) {
443 if (length(position) > 20000)
444 printf("%s source and listener distance greater than 20km!\n",
446 if (isNaN(toVec3f(position).data())) printf("NaN in source position\n");
447 if (isNaN(orientation.data())) printf("NaN in source orientation\n");
448 if (isNaN(velocity.data())) printf("NaN in source velocity\n");
451 unsigned int source = sample->get_source();
452 alSourcefv( source, AL_POSITION, toVec3f(position).data() );
453 alSourcefv( source, AL_VELOCITY, velocity.data() );
454 alSourcefv( source, AL_DIRECTION, orientation.data() );
455 testForALError("position and orientation");
457 alSourcef( source, AL_PITCH, sample->get_pitch() );
458 alSourcef( source, AL_GAIN, sample->get_volume() );
459 testForALError("pitch and gain");
461 if ( sample->has_static_data_changed() ) {
462 alSourcef( source, AL_CONE_INNER_ANGLE, sample->get_innerangle() );
463 alSourcef( source, AL_CONE_OUTER_ANGLE, sample->get_outerangle() );
464 alSourcef( source, AL_CONE_OUTER_GAIN, sample->get_outergain() );
465 testForALError("audio cone");
467 alSourcef( source, AL_MAX_DISTANCE, sample->get_max_dist() );
468 alSourcef( source, AL_REFERENCE_DISTANCE,
469 sample->get_reference_dist() );
470 testForALError("distance rolloff");
474 bool SGSampleGroup::testForError(void *p, string s)
477 SG_LOG( SG_SOUND, SG_ALERT, "Error (sample group): " << s);
483 bool SGSampleGroup::testForALError(string s)
485 ALenum error = alGetError();
486 if (error != AL_NO_ERROR) {
487 SG_LOG( SG_SOUND, SG_ALERT, "AL Error (" << _refname << "): "
488 << alGetString(error) << " at " << s);