1 // sample_group.hxx -- 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 * \file sample_group.hxx
25 * sample groups contain all sounds related to one specific object and
26 * have to be added to the sound manager, otherwise they won't get processed.
29 #ifndef _SG_SAMPLE_GROUP_OPENAL_HXX
30 #define _SG_SAMPLE_GROUP_OPENAL_HXX 1
33 # error This library requires C++
36 #if defined(__APPLE__)
37 # include <OpenAL/al.h>
38 #elif defined(OPENALSDK)
48 #include <simgear/compiler.h>
49 #include <simgear/math/SGMath.hxx>
50 #include <simgear/structure/SGReferenced.hxx>
51 #include <simgear/structure/SGSharedPtr.hxx>
52 #include <simgear/structure/exception.hxx>
54 #include "sample_openal.hxx"
59 typedef map < string, SGSharedPtr<SGSoundSample> > sample_map;
60 typedef sample_map::iterator sample_map_iterator;
61 typedef sample_map::const_iterator const_sample_map_iterator;
65 class SGSampleGroup : public SGReferenced
70 * Empty constructor for class encapsulation.
71 * Note: The sample group should still be activated before use
77 * Register this sample group at the sound manager using refname
78 * Note: The sample group should still be activated before use
79 * @param smgr Pointer to a pre-initialized sound manager class
80 * @param refname Name of this group for reference purposes.
82 SGSampleGroup ( SGSoundMgr *smgr, const string &refname );
90 * Set the status of this sample group to active.
92 inline void activate() { _active = true; }
96 * Call this function periodically to update the OpenAL state of all
97 * samples associated with this class. None op the configuration changes
98 * take place without a call to this function.
100 virtual void update (double dt);
103 * Register an audio sample to this group.
104 * @param sound Pointer to a pre-initialized audio sample
105 * @param refname Name of this audio sample for reference purposes
106 * @return return true if successful
108 bool add( SGSharedPtr<SGSoundSample> sound, const string& refname );
111 * Remove an audio sample from this group.
112 * @param refname Reference name of the audio sample to remove
113 * @return return true if successful
115 bool remove( const string& refname );
118 * Test if a specified audio sample is registered at this sample group
119 * @param refname Reference name of the audio sample to test for
120 * @return true if the specified audio sample exists
122 bool exists( const string& refname );
125 * Find a specified audio sample in this sample group
126 * @param refname Reference name of the audio sample to find
127 * @return A pointer to the SGSoundSample
129 SGSoundSample *find( const string& refname );
132 * Request to stop playing all audio samples until further notice.
137 * Request to resume playing all audio samples.
142 * Request to start playing the refered audio sample.
143 * @param refname Reference name of the audio sample to start playing
144 * @param looping Define if the sound should loop continuously
145 * @return true if the audio sample exsists and is scheduled for playing
147 bool play( const string& refname, bool looping );
150 * Request to start playing the refered audio sample looping.
151 * @param refname Reference name of the audio sample to start playing
152 * @return true if the audio sample exsists and is scheduled for playing
154 inline bool play_looped( const string& refname ) {
155 return play( refname, true );
159 * Request to start playing the refered audio sample once.
160 * @param refname Reference name of the audio sample to start playing
161 * @return true if the audio sample exsists and is scheduled for playing
163 inline bool play_once( const string& refname ) {
164 return play( refname, false );
168 * Test if a referenced sample is playing or not.
169 * @param refname Reference name of the audio sample to test for
170 * @return True of the specified sound is currently playing
172 bool is_playing( const string& refname );
175 * Request to stop playing the refered audio sample.
176 * @param refname Reference name of the audio sample to stop
177 * @return true if the audio sample exsists and is scheduled to stop
179 bool stop( const string& refname );
182 * Set the master volume for this sample group.
183 * @param vol Volume (must be between 0.0 and 1.0)
185 void set_volume( float vol );
188 * Set the velocity vector of this sample group.
189 * This is in the local frame coordinate system; x=north, y=east, z=down
190 * @param vel Velocity vector
192 void set_velocity( const SGVec3d& vel ) {
193 _velocity = vel; _changed = true;
197 * Set the position of this sample group.
198 * This is in the same coordinate system as OpenGL; y=up, z=back, x=right.
199 * @param pos Base position
201 void set_position_geod( const SGGeod& pos ) {
202 _base_pos = pos; _changed = true;
206 * Set the orientation of this sample group.
207 * @param ori Quaternation containing the orientation information
209 void set_orientation( const SGQuatd& ori ) {
210 _orientation = ori; _changed = true;
214 * Tie this sample group to the listener position, orientation and velocity
216 void tie_to_listener() { _tied_to_listener = true; }
227 bool _tied_to_listener;
231 SGQuatd _orientation;
234 std::vector< SGSharedPtr<SGSoundSample> > _removed_samples;
236 bool testForALError(string s);
237 bool testForError(void *p, string s);
239 void update_pos_and_orientation();
240 void update_sample_config( SGSoundSample *sound );
243 #endif // _SG_SAMPLE_GROUP_OPENAL_HXX