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()),
75 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
76 if (_alut_init == 0) {
77 if ( !alutInitWithoutContext(NULL, NULL) ) {
78 testForALUTError("alut initialization");
88 SGSoundMgr::~SGSoundMgr() {
91 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
93 if (_alut_init == 0) {
99 // initialize the sound manager
100 void SGSoundMgr::init() {
102 SG_LOG( SG_GENERAL, SG_INFO, "Initializing OpenAL sound manager" );
104 ALCdevice *device = alcOpenDevice(_devname);
105 if ( testForError(device, "No default audio device available.") ) {
109 ALCcontext *context = alcCreateContext(device, NULL);
110 if ( testForError(context, "Unable to create a valid context.") ) {
111 alcCloseDevice (device);
115 if ( !alcMakeContextCurrent(context) ) {
116 testForALCError("context initialization");
117 alcDestroyContext (context);
118 alcCloseDevice (device);
122 if (_context != NULL)
123 SG_LOG(SG_GENERAL, SG_ALERT, "context is already assigned");
127 _at_up_vec[0] = 0.0; _at_up_vec[1] = 0.0; _at_up_vec[2] = -1.0;
128 _at_up_vec[3] = 0.0; _at_up_vec[4] = 1.0; _at_up_vec[5] = 0.0;
130 alListenerf( AL_GAIN, 0.0f );
131 alListenerfv( AL_ORIENTATION, _at_up_vec );
132 alListenerfv( AL_POSITION, SGVec3f::zeros().data() );
133 alListenerfv( AL_VELOCITY, SGVec3f::zeros().data() );
135 alDopplerFactor(1.0);
136 alDopplerVelocity(340.3); // speed of sound in meters per second.
138 // gain = AL_REFERENCE_DISTANCE / (AL_REFERENCE_DISTANCE +
139 // AL_ROLLOFF_FACTOR * (distance - AL_REFERENCE_DISTANCE));
140 alDistanceModel(AL_INVERSE_DISTANCE_CLAMPED);
142 testForALError("listener initialization");
144 // get a free source one at a time
145 // if an error is returned no more (hardware) sources are available
146 for (unsigned int i=0; i<MAX_SOURCES; i++) {
151 alGenSources(1, &source);
152 error = alGetError();
153 if ( error == AL_NO_ERROR ) {
154 _free_sources.push_back( source );
159 const char *vendor = (char *)alGetString(AL_VENDOR);
160 const char *renderer = (char *)alGetString(AL_RENDERER);
161 if ( strcmp(vendor, "OpenAL Community") || strcmp(renderer, "Software")
162 || strcmp(renderer, "OpenAL Sample Implementation") ) {
166 if (_free_sources.size() == 0) {
167 SG_LOG(SG_GENERAL, SG_ALERT, "Unable to grab any OpenAL sources!");
171 void SGSoundMgr::activate() {
174 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
175 sample_group_map_iterator sample_grp_end = _sample_groups.end();
176 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
177 SGSampleGroup *sgrp = sample_grp_current->second;
183 // stop the sound manager
184 void SGSoundMgr::stop() {
189 // clear any OpenAL buffers before shutting down
190 buffer_map_iterator buffers_current = _buffers.begin();
191 buffer_map_iterator buffers_end = _buffers.end();
192 for ( ; buffers_current != buffers_end; ++buffers_current ) {
193 refUint ref = buffers_current->second;
194 ALuint buffer = ref.id;
195 alDeleteBuffers(1, &buffer);
199 _context = alcGetCurrentContext();
200 _device = alcGetContextsDevice(_context);
201 alcDestroyContext(_context);
202 alcCloseDevice(_device);
206 void SGSoundMgr::suspend() {
208 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
209 sample_group_map_iterator sample_grp_end = _sample_groups.end();
210 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
211 SGSampleGroup *sgrp = sample_grp_current->second;
218 void SGSoundMgr::resume() {
220 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
221 sample_group_map_iterator sample_grp_end = _sample_groups.end();
222 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
223 SGSampleGroup *sgrp = sample_grp_current->second;
230 void SGSoundMgr::bind ()
232 _free_sources.clear();
233 _free_sources.reserve( MAX_SOURCES );
234 _sources_in_use.clear();
235 _sources_in_use.reserve( MAX_SOURCES );
239 void SGSoundMgr::unbind ()
241 _sample_groups.clear();
243 // delete free sources
244 for (unsigned int i=0; i<_free_sources.size(); i++) {
245 ALuint source = _free_sources[i];
246 alDeleteSources( 1 , &source );
249 _free_sources.clear();
250 _sources_in_use.clear();
253 // run the audio scheduler
254 void SGSoundMgr::update( double dt ) {
257 update_pos_and_orientation();
260 sample_group_map_iterator sample_grp_current = _sample_groups.begin();
261 sample_group_map_iterator sample_grp_end = _sample_groups.end();
262 for ( ; sample_grp_current != sample_grp_end; ++sample_grp_current ) {
263 SGSampleGroup *sgrp = sample_grp_current->second;
269 if (isNaN(_at_up_vec)) printf("NaN in listener orientation\n");
270 if (isNaN(toVec3f(_absolute_pos).data())) printf("NaN in listener position\n");
271 if (isNaN(_velocity.data())) printf("NaN in listener velocity\n");
273 alListenerf( AL_GAIN, _volume );
274 alListenerfv( AL_ORIENTATION, _at_up_vec );
275 // alListenerfv( AL_POSITION, toVec3f(_absolute_pos).data() );
277 SGQuatd hlOr = SGQuatd::fromLonLat( _geod_pos );
278 SGVec3d velocity = SGVec3d::zeros();
279 if ( _velocity[0] || _velocity[1] || _velocity[2] ) {
280 velocity = hlOr.backTransform(_velocity*SG_FEET_TO_METER);
283 if ( _bad_doppler ) {
287 alListenerfv( AL_VELOCITY, toVec3f(velocity).data() );
288 // alDopplerVelocity(340.3); // TODO: altitude dependent
289 testForALError("update");
295 // add a sample group, return true if successful
296 bool SGSoundMgr::add( SGSampleGroup *sgrp, 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 already exists
304 if (_active) sgrp->activate();
305 _sample_groups[refname] = sgrp;
311 // remove a sound effect, return true if successful
312 bool SGSoundMgr::remove( const string &refname )
314 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
315 if ( sample_grp_it == _sample_groups.end() ) {
316 // sample group was not found.
320 _sample_groups.erase( sample_grp_it );
326 // return true of the specified sound exists in the sound manager system
327 bool SGSoundMgr::exists( const string &refname ) {
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.
338 // return a pointer to the SGSampleGroup if the specified sound exists
339 // in the sound manager system, otherwise return NULL
340 SGSampleGroup *SGSoundMgr::find( const string &refname, bool create ) {
341 sample_group_map_iterator sample_grp_it = _sample_groups.find( refname );
342 if ( sample_grp_it == _sample_groups.end() ) {
343 // sample group was not found.
345 SGSampleGroup* sgrp = new SGSampleGroup(this, refname);
346 add( sgrp, refname );
353 return sample_grp_it->second;
357 void SGSoundMgr::set_volume( float v )
360 if (_volume > 1.0) _volume = 1.0;
361 if (_volume < 0.0) _volume = 0.0;
365 // Get an unused source id
367 // The Sound Manager should keep track of the sources in use, the distance
368 // of these sources to the listener and the volume (also based on audio cone
369 // and hence orientation) of the sources.
371 // The Sound Manager is (and should be) the only one knowing about source
372 // management. Sources further away should be suspendped to free resources for
373 // newly added sounds close by.
374 unsigned int SGSoundMgr::request_source()
376 unsigned int source = NO_SOURCE;
378 if (_free_sources.size() > 0) {
379 source = _free_sources.back();
380 _free_sources.pop_back();
381 _sources_in_use.push_back(source);
384 SG_LOG( SG_GENERAL, SG_INFO, "No more free sources available\n");
389 // Free up a source id for further use
390 void SGSoundMgr::release_source( unsigned int source )
392 vector<ALuint>::iterator it;
394 it = std::find(_sources_in_use.begin(), _sources_in_use.end(), source);
395 if ( it != _sources_in_use.end() ) {
398 alGetSourcei( source, AL_SOURCE_STATE, &result );
399 if ( result == AL_PLAYING )
400 alSourceStop( source );
401 testForALError("release source");
403 alSourcei( source, AL_BUFFER, 0 );
404 _free_sources.push_back( source );
405 _sources_in_use.erase( it );
409 unsigned int SGSoundMgr::request_buffer(SGSoundSample *sample)
411 ALuint buffer = NO_BUFFER;
413 if ( !sample->is_valid_buffer() ) {
414 // sample was not yet loaded or removed again
415 string sample_name = sample->get_sample_name();
417 // see if the sample name is already cached
418 buffer_map_iterator buffer_it = _buffers.find( sample_name );
419 if ( buffer_it != _buffers.end() ) {
420 buffer_it->second.refctr++;
421 buffer = buffer_it->second.id;
422 sample->set_buffer( buffer );
426 // sample name was not found in the buffer cache.
427 if ( sample->is_file() ) {
432 load(sample_name, &data, &format, &size, &freq);
433 sample->set_data( &data );
434 sample->set_frequency( freq );
435 sample->set_format( format );
436 sample->set_size( size );
439 // create an OpenAL buffer handle
440 alGenBuffers(1, &buffer);
441 if ( !testForALError("generate buffer") ) {
442 // Copy data to the internal OpenAL buffer
444 const ALvoid *data = sample->get_data();
445 ALenum format = sample->get_format();
446 ALsizei size = sample->get_size();
447 ALsizei freq = sample->get_frequency();
448 alBufferData( buffer, format, data, size, freq );
450 // If this sample was read from a file we have all the information
451 // needed to read it again. For data buffers provided by the
452 // program we don't; so don't delete it's data.
453 if ( sample->is_file() ) sample->free_data();
455 if ( !testForALError("buffer add data") ) {
456 sample->set_buffer(buffer);
457 _buffers[sample_name] = refUint(buffer);
462 buffer = sample->get_buffer();
468 void SGSoundMgr::release_buffer(SGSoundSample *sample)
470 string sample_name = sample->get_sample_name();
471 buffer_map_iterator buffer_it = _buffers.find( sample_name );
472 if ( buffer_it == _buffers.end() ) {
473 // buffer was not found
477 sample->no_valid_buffer();
478 buffer_it->second.refctr--;
479 if (buffer_it->second.refctr == 0) {
480 ALuint buffer = buffer_it->second.id;
481 alDeleteBuffers(1, &buffer);
482 _buffers.erase( buffer_it );
483 testForALError("release buffer");
487 void SGSoundMgr::update_pos_and_orientation() {
489 * Description: ORIENTATION is a pair of 3-tuples representing the
490 * 'at' direction vector and 'up' direction of the Object in
491 * Cartesian space. AL expects two vectors that are orthogonal to
492 * each other. These vectors are not expected to be normalized. If
493 * one or more vectors have zero length, implementation behavior
494 * is undefined. If the two vectors are linearly dependent,
495 * behavior is undefined.
497 * This is in the same coordinate system as OpenGL; y=up, z=back, x=right.
499 SGVec3d sgv_at = _orientation.backTransform(-SGVec3d::e3());
500 SGVec3d sgv_up = _orientation.backTransform(SGVec3d::e2());
501 _at_up_vec[0] = sgv_at[0];
502 _at_up_vec[1] = sgv_at[1];
503 _at_up_vec[2] = sgv_at[2];
504 _at_up_vec[3] = sgv_up[0];
505 _at_up_vec[4] = sgv_up[1];
506 _at_up_vec[5] = sgv_up[2];
508 // static const SGQuatd q(-0.5, -0.5, 0.5, 0.5);
509 // SGQuatd hlOr = SGQuatd::fromLonLat(SGGeod::fromCart(_base_pos));
510 // SGQuatd ec2body = hlOr*_orientation;
511 _absolute_pos = _base_pos; // + ec2body.backTransform( _offset_pos );
514 bool SGSoundMgr::load(string &samplepath, void **dbuf, int *fmt,
515 size_t *sz, int *frq )
517 if ( !_working ) return false;
524 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
526 data = alutLoadMemoryFromFile(samplepath.c_str(), &format, &size, &freqf );
527 freq = (ALsizei)freqf;
529 int error = alutGetError();
530 string msg = "Failed to load wav file: ";
531 msg.append(alutGetErrorString(error));
532 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
537 ALbyte *fname = (ALbyte *)samplepath.c_str();
538 # if defined (__APPLE__)
539 alutLoadWAVFile( fname, &format, &data, &size, &freq );
542 alutLoadWAVFile( fname, &format, &data, &size, &freq, &loop );
544 ALenum error = alGetError();
545 if ( error != AL_NO_ERROR ) {
546 string msg = "Failed to load wav file: ";
547 msg.append(alGetString(error));
548 throw sg_io_exception(msg.c_str(), sg_location(samplepath));
553 *dbuf = (void *)data;
562 bool SGSoundMgr::testForError(void *p, string s)
565 SG_LOG( SG_GENERAL, SG_ALERT, "Error: " << s);
572 bool SGSoundMgr::testForALError(string s)
574 ALenum error = alGetError();
575 if (error != AL_NO_ERROR) {
576 SG_LOG( SG_GENERAL, SG_ALERT, "AL Error (sound manager): "
577 << alGetString(error) << " at " << s);
583 bool SGSoundMgr::testForALCError(string s)
586 error = alcGetError(_device);
587 if (error != ALC_NO_ERROR) {
588 SG_LOG( SG_GENERAL, SG_ALERT, "ALC Error (sound manager): "
589 << alcGetString(_device, error) << " at "
596 bool SGSoundMgr::testForALUTError(string s)
598 #if defined(ALUT_API_MAJOR_VERSION) && ALUT_API_MAJOR_VERSION >= 1
600 error = alutGetError ();
601 if (error != ALUT_ERROR_NO_ERROR) {
602 SG_LOG( SG_GENERAL, SG_ALERT, "ALUT Error (sound manager): "
603 << alutGetErrorString(error) << " at "