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 _velocity(SGVec3d::zeros()),
70 _orientation(SGQuatd::zeros()),
73 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
74 if (_alut_init == 0) {
75 if ( !alutInitWithoutContext(NULL, NULL) ) {
76 testForALUTError("alut initialization");
86 SGSoundMgr::~SGSoundMgr() {
89 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
91 if (_alut_init == 0) {
97 // initialize the sound manager
98 void SGSoundMgr::init() {
100 SG_LOG( SG_GENERAL, SG_INFO, "Initializing OpenAL sound manager" );
102 ALCdevice *device = alcOpenDevice(_devname);
103 if ( testForError(device, "No default audio device available.") ) {
107 ALCcontext *context = alcCreateContext(device, NULL);
108 if ( testForError(context, "Unable to create a valid context.") ) {
109 alcCloseDevice (device);
113 if ( !alcMakeContextCurrent(context) ) {
114 testForALCError("context initialization");
115 alcDestroyContext (context);
116 alcCloseDevice (device);
120 if (_context != NULL)
121 SG_LOG(SG_GENERAL, SG_ALERT, "context is already assigned");
125 _at_up_vec[0] = 0.0; _at_up_vec[1] = 0.0; _at_up_vec[2] = -1.0;
126 _at_up_vec[3] = 0.0; _at_up_vec[4] = 1.0; _at_up_vec[5] = 0.0;
128 alListenerf( AL_GAIN, 0.0f );
129 alListenerfv( AL_ORIENTATION, _at_up_vec );
130 alListenerfv( AL_POSITION, SGVec3f::zeros().data() );
131 alListenerfv( AL_VELOCITY, SGVec3f::zeros().data() );
133 alDopplerFactor(1.0);
134 alDopplerVelocity(340.3); // speed of sound in meters per second.
137 if ( alIsExtensionPresent((const ALchar*)"EXT_exponent_distance") ) {
138 alDistanceModel(AL_EXPONENT_DISTANCE);
140 alDistanceModel(AL_INVERSE_DISTANCE);
144 testForALError("listener initialization");
146 // get a free source one at a time
147 // if an error is returned no more (hardware) sources are available
148 for (unsigned int i=0; i<MAX_SOURCES; i++) {
153 alGenSources(1, &source);
154 error = alGetError();
155 if ( error == AL_NO_ERROR ) {
156 _free_sources.push_back( source );
161 if (_free_sources.size() == 0) {
162 SG_LOG(SG_GENERAL, SG_ALERT, "Unable to grab any OpenAL sources!");
166 void SGSoundMgr::activate() {
169 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
170 sample_group_map_iterator sample_grp_end = _sample_groups.end();
171 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
172 SGSampleGroup *sgrp = sample_grp_current->second;
178 // stop the sound manager
179 void SGSoundMgr::stop() {
184 // clear any OpenAL buffers before shutting down
185 buffer_map_iterator buffers_current = _buffers.begin();
186 buffer_map_iterator buffers_end = _buffers.end();
187 for ( ; buffers_current != buffers_end; ++buffers_current ) {
188 refUint ref = buffers_current->second;
189 ALuint buffer = ref.id;
190 alDeleteBuffers(1, &buffer);
194 _context = alcGetCurrentContext();
195 _device = alcGetContextsDevice(_context);
196 alcDestroyContext(_context);
197 alcCloseDevice(_device);
201 void SGSoundMgr::suspend() {
203 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
204 sample_group_map_iterator sample_grp_end = _sample_groups.end();
205 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
206 SGSampleGroup *sgrp = sample_grp_current->second;
213 void SGSoundMgr::resume() {
215 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
216 sample_group_map_iterator sample_grp_end = _sample_groups.end();
217 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
218 SGSampleGroup *sgrp = sample_grp_current->second;
225 void SGSoundMgr::bind ()
227 _free_sources.clear();
228 _free_sources.reserve( MAX_SOURCES );
229 _sources_in_use.clear();
230 _sources_in_use.reserve( MAX_SOURCES );
234 void SGSoundMgr::unbind ()
236 _sample_groups.clear();
238 // delete free sources
239 for (unsigned int i=0; i<_free_sources.size(); i++) {
240 ALuint source = _free_sources[i];
241 alDeleteSources( 1 , &source );
244 _free_sources.clear();
245 _sources_in_use.clear();
248 // run the audio scheduler
249 void SGSoundMgr::update( double dt ) {
252 update_pos_and_orientation();
255 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
256 sample_group_map_iterator sample_grp_end = _sample_groups.end();
257 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
258 SGSampleGroup *sgrp = sample_grp_current->second;
264 if (isNaN(_at_up_vec)) printf("NaN in listener orientation\n");
265 if (isNaN(toVec3f(_absolute_pos).data())) printf("NaN in listener position\n");
266 if (isNaN(_velocity.data())) printf("NaN in listener velocity\n");
268 alListenerf( AL_GAIN, _volume );
269 alListenerfv( AL_ORIENTATION, _at_up_vec );
270 // alListenerfv( AL_POSITION, toVec3f(_absolute_pos).data() );
271 alListenerfv( AL_VELOCITY, _velocity.data() );
272 // alDopplerVelocity(340.3); // TODO: altitude dependent
273 testForALError("update");
279 // add a sample group, return true if successful
280 bool SGSoundMgr::add( SGSampleGroup *sgrp, const string& refname )
282 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
283 if ( sample_grp_it != _sample_groups.end() ) {
284 // sample group already exists
288 if (_active) sgrp->activate();
289 _sample_groups[refname] = sgrp;
295 // remove a sound effect, return true if successful
296 bool SGSoundMgr::remove( const string &refname )
298 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
299 if ( sample_grp_it == _sample_groups.end() ) {
300 // sample group was not found.
304 _sample_groups.erase( sample_grp_it );
310 // return true of the specified sound exists in the sound manager system
311 bool SGSoundMgr::exists( const string &refname ) {
312 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
313 if ( sample_grp_it == _sample_groups.end() ) {
314 // sample group was not found.
322 // return a pointer to the SGSampleGroup if the specified sound exists
323 // in the sound manager system, otherwise return NULL
324 SGSampleGroup *SGSoundMgr::find( const string &refname, bool create ) {
325 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
326 if ( sample_grp_it == _sample_groups.end() ) {
327 // sample group was not found.
329 SGSampleGroup* sgrp = new SGSampleGroup(this, refname);
336 return sample_grp_it->second;
340 void SGSoundMgr::set_volume( float v )
343 if (_volume > 1.0) _volume = 1.0;
344 if (_volume < 0.0) _volume = 0.0;
348 // Get an unused source id
350 // The Sound Manager should keep track of the sources in use, the distance
351 // of these sources to the listener and the volume (also based on audio cone
352 // and hence orientation) of the sources.
354 // The Sound Manager is (and should be) the only one knowing about source
355 // management. Sources further away should be suspendped to free resources for
356 // newly added sounds close by.
357 unsigned int SGSoundMgr::request_source()
359 unsigned int source = NO_SOURCE;
361 if (_free_sources.size() > 0) {
362 source = _free_sources.back();
363 _free_sources.pop_back();
364 _sources_in_use.push_back(source);
367 SG_LOG( SG_GENERAL, SG_INFO, "No more free sources available\n");
372 // Free up a source id for further use
373 void SGSoundMgr::release_source( unsigned int source )
375 vector<ALuint>::iterator it;
377 it = std::find(_sources_in_use.begin(), _sources_in_use.end(), source);
378 if ( it != _sources_in_use.end() ) {
381 alGetSourcei( source, AL_SOURCE_STATE, &result );
382 if ( result == AL_PLAYING )
383 alSourceStop( source );
384 testForALError("release source");
386 alSourcei( source, AL_BUFFER, 0 );
387 _free_sources.push_back( source );
388 _sources_in_use.erase( it );
392 unsigned int SGSoundMgr::request_buffer(SGSoundSample *sample)
394 ALuint buffer = NO_BUFFER;
396 if ( !sample->is_valid_buffer() ) {
397 // sample was not yet loaded or removed again
398 string sample_name = sample->get_sample_name();
400 // see if the sample name is already cached
401 buffer_map_iterator buffer_it = _buffers.find( sample_name );
402 if ( buffer_it != _buffers.end() ) {
403 buffer_it->second.refctr++;
404 buffer = buffer_it->second.id;
405 sample->set_buffer( buffer );
409 // sample name was not found in the buffer cache.
410 if ( sample->is_file() ) {
415 load(sample_name, &data, &format, &size, &freq);
416 sample->set_data( &data );
417 sample->set_frequency( freq );
418 sample->set_format( format );
419 sample->set_size( size );
422 // create an OpenAL buffer handle
423 alGenBuffers(1, &buffer);
424 if ( !testForALError("generate buffer") ) {
425 // Copy data to the internal OpenAL buffer
427 const ALvoid *data = sample->get_data();
428 ALenum format = sample->get_format();
429 ALsizei size = sample->get_size();
430 ALsizei freq = sample->get_frequency();
431 alBufferData( buffer, format, data, size, freq );
433 // If this sample was read from a file we have all the information
434 // needed to read it again. For data buffers provided by the
435 // program we don't; so don't delete it's data.
436 if ( sample->is_file() ) sample->free_data();
438 if ( !testForALError("buffer add data") ) {
439 sample->set_buffer(buffer);
440 _buffers[sample_name] = refUint(buffer);
445 buffer = sample->get_buffer();
451 void SGSoundMgr::release_buffer(SGSoundSample *sample)
453 string sample_name = sample->get_sample_name();
454 buffer_map_iterator buffer_it = _buffers.find( sample_name );
455 if ( buffer_it == _buffers.end() ) {
456 // buffer was not found
460 sample->no_valid_buffer();
461 buffer_it->second.refctr--;
462 if (buffer_it->second.refctr == 0) {
463 ALuint buffer = buffer_it->second.id;
464 alDeleteBuffers(1, &buffer);
465 _buffers.erase( buffer_it );
466 testForALError("release buffer");
470 void SGSoundMgr::update_pos_and_orientation() {
472 * Description: ORIENTATION is a pair of 3-tuples representing the
473 * 'at' direction vector and 'up' direction of the Object in
474 * Cartesian space. AL expects two vectors that are orthogonal to
475 * each other. These vectors are not expected to be normalized. If
476 * one or more vectors have zero length, implementation behavior
477 * is undefined. If the two vectors are linearly dependent,
478 * behavior is undefined.
480 * This is in the same coordinate system as OpenGL; y=up, z=back, x=right.
482 SGVec3d sgv_at = _orientation.backTransform(-SGVec3d::e3());
483 SGVec3d sgv_up = _orientation.backTransform(SGVec3d::e2());
484 _at_up_vec[0] = sgv_at[0];
485 _at_up_vec[1] = sgv_at[1];
486 _at_up_vec[2] = sgv_at[2];
487 _at_up_vec[3] = sgv_up[0];
488 _at_up_vec[4] = sgv_up[1];
489 _at_up_vec[5] = sgv_up[2];
491 // static const SGQuatd q(-0.5, -0.5, 0.5, 0.5);
492 // SGQuatd hlOr = SGQuatd::fromLonLat(SGGeod::fromCart(_base_pos));
493 // SGQuatd ec2body = hlOr*_orientation;
494 _absolute_pos = _base_pos; // + ec2body.backTransform( _offset_pos );
497 bool SGSoundMgr::load(string &samplepath, void **dbuf, int *fmt,
498 size_t *sz, int *frq )
500 if ( !_working ) return false;
507 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
509 data = alutLoadMemoryFromFile(samplepath.c_str(), &format, &size, &freqf );
510 freq = (ALsizei)freqf;
512 int error = alutGetError();
513 string msg = "Failed to load wav file: ";
514 msg.append(alutGetErrorString(error));
515 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
520 ALbyte *fname = (ALbyte *)samplepath.c_str();
521 # if defined (__APPLE__)
522 alutLoadWAVFile( fname, &format, &data, &size, &freq );
525 alutLoadWAVFile( fname, &format, &data, &size, &freq, &loop );
527 ALenum error = alGetError();
528 if ( error != AL_NO_ERROR ) {
529 string msg = "Failed to load wav file: ";
530 msg.append(alGetString(error));
531 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
536 *dbuf = (void *)data;
545 bool SGSoundMgr::testForError(void *p, string s)
548 SG_LOG( SG_GENERAL, SG_ALERT, "Error: " << s);
555 bool SGSoundMgr::testForALError(string s)
557 ALenum error = alGetError();
558 if (error != AL_NO_ERROR) {
559 SG_LOG( SG_GENERAL, SG_ALERT, "AL Error (sound manager): "
560 << alGetString(error) << " at " << s);
566 bool SGSoundMgr::testForALCError(string s)
569 error = alcGetError(_device);
570 if (error != ALC_NO_ERROR) {
571 SG_LOG( SG_GENERAL, SG_ALERT, "ALC Error (sound manager): "
572 << alcGetString(_device, error) << " at "
579 bool SGSoundMgr::testForALUTError(string s)
581 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
583 error = alutGetError ();
584 if (error != ALUT_ERROR_NO_ERROR) {
585 SG_LOG( SG_GENERAL, SG_ALERT, "ALUT Error (sound manager): "
586 << alutGetErrorString(error) << " at "