1 // soundmgr.cxx -- Sound effect management class
3 // Sound manager initially written by David Findlay
4 // <david_j_findlay@yahoo.com.au> 2001
6 // C++-ified by Curtis Olson, started March 2001.
7 // Modified for the new SoundSystem by Erik Hofman, October 2009
9 // Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
10 // Copyright (C) 2009 Erik Hofman <erik@ehofman.com>
12 // This program is free software; you can redistribute it and/or
13 // modify it under the terms of the GNU General Public License as
14 // published by the Free Software Foundation; either version 2 of the
15 // License, or (at your option) any later version.
17 // This program is distributed in the hope that it will be useful, but
18 // WITHOUT ANY WARRANTY; without even the implied warranty of
19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 // General Public License for more details.
22 // You should have received a copy of the GNU General Public License
23 // along with this program; if not, write to the Free Software Foundation,
24 // Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
29 # include <simgear_config.h>
32 #if defined( __APPLE__ )
33 # include <OpenAL/alut.h>
41 #include "soundmgr_openal.hxx"
43 #include <simgear/structure/exception.hxx>
44 #include <simgear/debug/logstream.hxx>
45 #include <simgear/misc/sg_path.hxx>
46 #include <simgear/math/SGMath.hxx>
48 extern bool isNaN(float *v);
50 #define MAX_SOURCES 128
56 int SGSoundMgr::_alut_init = 0;
59 SGSoundMgr::SGSoundMgr() :
66 _absolute_pos(SGVec3d::zeros()),
67 _offset_pos(SGVec3d::zeros()),
68 _base_pos(SGVec3d::zeros()),
69 _geod_pos(SGGeod::fromCart(SGVec3d::zeros())),
70 _velocity(SGVec3d::zeros()),
71 _orientation(SGQuatd::zeros()),
74 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
75 if (_alut_init == 0) {
76 if ( !alutInitWithoutContext(NULL, NULL) ) {
77 testForALUTError("alut initialization");
87 SGSoundMgr::~SGSoundMgr() {
90 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
92 if (_alut_init == 0) {
98 // initialize the sound manager
99 void SGSoundMgr::init() {
101 SG_LOG( SG_GENERAL, SG_INFO, "Initializing OpenAL sound manager" );
103 ALCdevice *device = alcOpenDevice(_devname);
104 if ( testForError(device, "No default audio device available.") ) {
108 ALCcontext *context = alcCreateContext(device, NULL);
109 if ( testForError(context, "Unable to create a valid context.") ) {
110 alcCloseDevice (device);
114 if ( !alcMakeContextCurrent(context) ) {
115 testForALCError("context initialization");
116 alcDestroyContext (context);
117 alcCloseDevice (device);
121 if (_context != NULL)
122 SG_LOG(SG_GENERAL, SG_ALERT, "context is already assigned");
126 _at_up_vec[0] = 0.0; _at_up_vec[1] = 0.0; _at_up_vec[2] = -1.0;
127 _at_up_vec[3] = 0.0; _at_up_vec[4] = 1.0; _at_up_vec[5] = 0.0;
129 alListenerf( AL_GAIN, 0.0f );
130 alListenerfv( AL_ORIENTATION, _at_up_vec );
131 alListenerfv( AL_POSITION, SGVec3f::zeros().data() );
132 alListenerfv( AL_VELOCITY, SGVec3f::zeros().data() );
134 alDopplerFactor(1.0);
135 alDopplerVelocity(340.3); // speed of sound in meters per second.
137 // gain = AL_REFERENCE_DISTANCE / (AL_REFERENCE_DISTANCE +
138 // AL_ROLLOFF_FACTOR * (distance - AL_REFERENCE_DISTANCE));
139 alDistanceModel(AL_INVERSE_DISTANCE_CLAMPED);
141 testForALError("listener initialization");
143 // get a free source one at a time
144 // if an error is returned no more (hardware) sources are available
145 for (unsigned int i=0; i<MAX_SOURCES; i++) {
150 alGenSources(1, &source);
151 error = alGetError();
152 if ( error == AL_NO_ERROR ) {
153 _free_sources.push_back( source );
158 if (_free_sources.size() == 0) {
159 SG_LOG(SG_GENERAL, SG_ALERT, "Unable to grab any OpenAL sources!");
163 void SGSoundMgr::activate() {
166 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
167 sample_group_map_iterator sample_grp_end = _sample_groups.end();
168 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
169 SGSampleGroup *sgrp = sample_grp_current->second;
175 // stop the sound manager
176 void SGSoundMgr::stop() {
181 // clear any OpenAL buffers before shutting down
182 buffer_map_iterator buffers_current = _buffers.begin();
183 buffer_map_iterator buffers_end = _buffers.end();
184 for ( ; buffers_current != buffers_end; ++buffers_current ) {
185 refUint ref = buffers_current->second;
186 ALuint buffer = ref.id;
187 alDeleteBuffers(1, &buffer);
191 _context = alcGetCurrentContext();
192 _device = alcGetContextsDevice(_context);
193 alcDestroyContext(_context);
194 alcCloseDevice(_device);
198 void SGSoundMgr::suspend() {
200 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
201 sample_group_map_iterator sample_grp_end = _sample_groups.end();
202 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
203 SGSampleGroup *sgrp = sample_grp_current->second;
210 void SGSoundMgr::resume() {
212 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
213 sample_group_map_iterator sample_grp_end = _sample_groups.end();
214 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
215 SGSampleGroup *sgrp = sample_grp_current->second;
222 void SGSoundMgr::bind ()
224 _free_sources.clear();
225 _free_sources.reserve( MAX_SOURCES );
226 _sources_in_use.clear();
227 _sources_in_use.reserve( MAX_SOURCES );
231 void SGSoundMgr::unbind ()
233 _sample_groups.clear();
235 // delete free sources
236 for (unsigned int i=0; i<_free_sources.size(); i++) {
237 ALuint source = _free_sources[i];
238 alDeleteSources( 1 , &source );
241 _free_sources.clear();
242 _sources_in_use.clear();
245 // run the audio scheduler
246 void SGSoundMgr::update( double dt ) {
249 update_pos_and_orientation();
252 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
253 sample_group_map_iterator sample_grp_end = _sample_groups.end();
254 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
255 SGSampleGroup *sgrp = sample_grp_current->second;
261 if (isNaN(_at_up_vec)) printf("NaN in listener orientation\n");
262 if (isNaN(toVec3f(_absolute_pos).data())) printf("NaN in listener position\n");
263 if (isNaN(_velocity.data())) printf("NaN in listener velocity\n");
265 alListenerf( AL_GAIN, _volume );
266 alListenerfv( AL_ORIENTATION, _at_up_vec );
267 // alListenerfv( AL_POSITION, toVec3f(_absolute_pos).data() );
269 SGQuatd hlOr = SGQuatd::fromLonLat( _geod_pos );
270 SGVec3d velocity = SGVec3d::zeros();
271 if ( _velocity[0] || _velocity[1] || _velocity[2] ) {
272 velocity = hlOr.backTransform(_velocity*SG_FEET_TO_METER);
274 alListenerfv( AL_VELOCITY, toVec3f(velocity).data() );
275 // alDopplerVelocity(340.3); // TODO: altitude dependent
276 testForALError("update");
282 // add a sample group, return true if successful
283 bool SGSoundMgr::add( SGSampleGroup *sgrp, const string& refname )
285 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
286 if ( sample_grp_it != _sample_groups.end() ) {
287 // sample group already exists
291 if (_active) sgrp->activate();
292 _sample_groups[refname] = sgrp;
298 // remove a sound effect, return true if successful
299 bool SGSoundMgr::remove( const string &refname )
301 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
302 if ( sample_grp_it == _sample_groups.end() ) {
303 // sample group was not found.
307 _sample_groups.erase( sample_grp_it );
313 // return true of the specified sound exists in the sound manager system
314 bool SGSoundMgr::exists( const string &refname ) {
315 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
316 if ( sample_grp_it == _sample_groups.end() ) {
317 // sample group was not found.
325 // return a pointer to the SGSampleGroup if the specified sound exists
326 // in the sound manager system, otherwise return NULL
327 SGSampleGroup *SGSoundMgr::find( const string &refname, bool create ) {
328 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
329 if ( sample_grp_it == _sample_groups.end() ) {
330 // sample group was not found.
332 SGSampleGroup* sgrp = new SGSampleGroup(this, refname);
333 add( sgrp, refname );
340 return sample_grp_it->second;
344 void SGSoundMgr::set_volume( float v )
347 if (_volume > 1.0) _volume = 1.0;
348 if (_volume < 0.0) _volume = 0.0;
352 // Get an unused source id
354 // The Sound Manager should keep track of the sources in use, the distance
355 // of these sources to the listener and the volume (also based on audio cone
356 // and hence orientation) of the sources.
358 // The Sound Manager is (and should be) the only one knowing about source
359 // management. Sources further away should be suspendped to free resources for
360 // newly added sounds close by.
361 unsigned int SGSoundMgr::request_source()
363 unsigned int source = NO_SOURCE;
365 if (_free_sources.size() > 0) {
366 source = _free_sources.back();
367 _free_sources.pop_back();
368 _sources_in_use.push_back(source);
371 SG_LOG( SG_GENERAL, SG_INFO, "No more free sources available\n");
376 // Free up a source id for further use
377 void SGSoundMgr::release_source( unsigned int source )
379 vector<ALuint>::iterator it;
381 it = std::find(_sources_in_use.begin(), _sources_in_use.end(), source);
382 if ( it != _sources_in_use.end() ) {
385 alGetSourcei( source, AL_SOURCE_STATE, &result );
386 if ( result == AL_PLAYING )
387 alSourceStop( source );
388 testForALError("release source");
390 alSourcei( source, AL_BUFFER, 0 );
391 _free_sources.push_back( source );
392 _sources_in_use.erase( it );
396 unsigned int SGSoundMgr::request_buffer(SGSoundSample *sample)
398 ALuint buffer = NO_BUFFER;
400 if ( !sample->is_valid_buffer() ) {
401 // sample was not yet loaded or removed again
402 string sample_name = sample->get_sample_name();
404 // see if the sample name is already cached
405 buffer_map_iterator buffer_it = _buffers.find( sample_name );
406 if ( buffer_it != _buffers.end() ) {
407 buffer_it->second.refctr++;
408 buffer = buffer_it->second.id;
409 sample->set_buffer( buffer );
413 // sample name was not found in the buffer cache.
414 if ( sample->is_file() ) {
419 load(sample_name, &data, &format, &size, &freq);
420 sample->set_data( &data );
421 sample->set_frequency( freq );
422 sample->set_format( format );
423 sample->set_size( size );
426 // create an OpenAL buffer handle
427 alGenBuffers(1, &buffer);
428 if ( !testForALError("generate buffer") ) {
429 // Copy data to the internal OpenAL buffer
431 const ALvoid *data = sample->get_data();
432 ALenum format = sample->get_format();
433 ALsizei size = sample->get_size();
434 ALsizei freq = sample->get_frequency();
435 alBufferData( buffer, format, data, size, freq );
437 // If this sample was read from a file we have all the information
438 // needed to read it again. For data buffers provided by the
439 // program we don't; so don't delete it's data.
440 if ( sample->is_file() ) sample->free_data();
442 if ( !testForALError("buffer add data") ) {
443 sample->set_buffer(buffer);
444 _buffers[sample_name] = refUint(buffer);
449 buffer = sample->get_buffer();
455 void SGSoundMgr::release_buffer(SGSoundSample *sample)
457 string sample_name = sample->get_sample_name();
458 buffer_map_iterator buffer_it = _buffers.find( sample_name );
459 if ( buffer_it == _buffers.end() ) {
460 // buffer was not found
464 sample->no_valid_buffer();
465 buffer_it->second.refctr--;
466 if (buffer_it->second.refctr == 0) {
467 ALuint buffer = buffer_it->second.id;
468 alDeleteBuffers(1, &buffer);
469 _buffers.erase( buffer_it );
470 testForALError("release buffer");
474 void SGSoundMgr::update_pos_and_orientation() {
476 * Description: ORIENTATION is a pair of 3-tuples representing the
477 * 'at' direction vector and 'up' direction of the Object in
478 * Cartesian space. AL expects two vectors that are orthogonal to
479 * each other. These vectors are not expected to be normalized. If
480 * one or more vectors have zero length, implementation behavior
481 * is undefined. If the two vectors are linearly dependent,
482 * behavior is undefined.
484 * This is in the same coordinate system as OpenGL; y=up, z=back, x=right.
486 SGVec3d sgv_at = _orientation.backTransform(-SGVec3d::e3());
487 SGVec3d sgv_up = _orientation.backTransform(SGVec3d::e2());
488 _at_up_vec[0] = sgv_at[0];
489 _at_up_vec[1] = sgv_at[1];
490 _at_up_vec[2] = sgv_at[2];
491 _at_up_vec[3] = sgv_up[0];
492 _at_up_vec[4] = sgv_up[1];
493 _at_up_vec[5] = sgv_up[2];
495 // static const SGQuatd q(-0.5, -0.5, 0.5, 0.5);
496 // SGQuatd hlOr = SGQuatd::fromLonLat(SGGeod::fromCart(_base_pos));
497 // SGQuatd ec2body = hlOr*_orientation;
498 _absolute_pos = _base_pos; // + ec2body.backTransform( _offset_pos );
501 bool SGSoundMgr::load(string &samplepath, void **dbuf, int *fmt,
502 size_t *sz, int *frq )
504 if ( !_working ) return false;
511 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
513 data = alutLoadMemoryFromFile(samplepath.c_str(), &format, &size, &freqf );
514 freq = (ALsizei)freqf;
516 int error = alutGetError();
517 string msg = "Failed to load wav file: ";
518 msg.append(alutGetErrorString(error));
519 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
524 ALbyte *fname = (ALbyte *)samplepath.c_str();
525 # if defined (__APPLE__)
526 alutLoadWAVFile( fname, &format, &data, &size, &freq );
529 alutLoadWAVFile( fname, &format, &data, &size, &freq, &loop );
531 ALenum error = alGetError();
532 if ( error != AL_NO_ERROR ) {
533 string msg = "Failed to load wav file: ";
534 msg.append(alGetString(error));
535 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
540 *dbuf = (void *)data;
549 bool SGSoundMgr::testForError(void *p, string s)
552 SG_LOG( SG_GENERAL, SG_ALERT, "Error: " << s);
559 bool SGSoundMgr::testForALError(string s)
561 ALenum error = alGetError();
562 if (error != AL_NO_ERROR) {
563 SG_LOG( SG_GENERAL, SG_ALERT, "AL Error (sound manager): "
564 << alGetString(error) << " at " << s);
570 bool SGSoundMgr::testForALCError(string s)
573 error = alcGetError(_device);
574 if (error != ALC_NO_ERROR) {
575 SG_LOG( SG_GENERAL, SG_ALERT, "ALC Error (sound manager): "
576 << alcGetString(_device, error) << " at "
583 bool SGSoundMgr::testForALUTError(string s)
585 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
587 error = alutGetError ();
588 if (error != ALUT_ERROR_NO_ERROR) {
589 SG_LOG( SG_GENERAL, SG_ALERT, "ALUT Error (sound manager): "
590 << alutGetErrorString(error) << " at "