1 // sample.hxx -- Sound sample encapsulation class
3 // Written by Curtis Olson, started April 2004.
5 // Copyright (C) 2004 Curtis L. Olson - http://www.flightgear.org/~curt
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
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 * Provides a sound sample encapsulation
28 #ifndef _SG_SAMPLE_HXX
29 #define _SG_SAMPLE_HXX 1
32 # error This library requires C++
35 #include <simgear/compiler.h>
39 #include <simgear/debug/logstream.hxx>
40 #include <simgear/structure/SGReferenced.hxx>
41 #include <simgear/structure/SGSharedPtr.hxx>
45 #if defined(__APPLE__)
46 # define AL_ILLEGAL_ENUM AL_INVALID_ENUM
47 # define AL_ILLEGAL_COMMAND AL_INVALID_OPERATION
48 # include <OpenAL/al.h>
49 # include <OpenAL/alut.h>
59 * manages everything we need to know for an individual sound sample
62 class SGSoundSample : public SGReferenced {
68 // Buffers hold sound data.
71 // Sources are points emitting sound.
74 // Position of the source sound.
75 ALfloat source_pos[3];
77 // A constant offset to be applied to the final source_pos
78 ALfloat offset_pos[3];
80 // The orientation of the sound (direction and cut-off angles)
82 ALfloat inner, outer, outergain;
84 // Velocity of the source sound.
85 ALfloat source_vel[3];
87 // configuration values
94 double reference_dist;
100 bool no_Doppler_effect;
105 * Empty constructor, can be used to read data to the systems
106 * memory and not to the driver.
112 * @param path Path name to sound
113 * @param file File name of sound
114 should usually be true unless you want to manipulate the data
117 SGSoundSample( const char *path, const char *file , bool no_Doppler_effect = true );
121 * @param _data Pointer to a memory buffer containing the sample data
122 the application is responsible for freeing the buffer data.
123 * @param len Byte length of array
124 * @param _freq Frequency of the provided data (bytes per second)
125 should usually be true unless you want to manipulate the data
128 SGSoundSample( unsigned char *_data, int len, int _freq , bool no_Doppler_effect = true );
133 * Start playing this sample.
135 * @param _loop Define wether the sound should be played in a loop.
137 void play( bool _loop );
140 * Stop playing this sample.
142 * @param sched A pointer to the appropriate scheduler.
147 * Play this sample once.
150 inline void play_once() { play(false); }
153 * Play this sample looped.
156 inline void play_looped() { play(true); }
159 * Test if a sample is curretnly playing.
160 * @return true if is is playing, false otherwise.
165 * Get the current pitch setting of this sample.
167 inline double get_pitch() const { return pitch; }
170 * Set the pitch of this sample.
172 void set_pitch( double p );
175 * Get the current volume setting of this sample.
177 inline double get_volume() const { return volume; }
180 * Set the volume of this sample.
182 void set_volume( double v );
185 * Returns the size of the sounds sample
187 inline int get_size() {
192 * Set position of sound source (uses same coordinate system as opengl)
194 void set_source_pos( ALfloat *pos );
197 * Set "constant" offset position of sound source (uses same
198 * coordinate system as opengl)
200 void set_offset_pos( ALfloat *pos );
203 * Set the orientation of the sound source, both for direction
204 * and audio cut-off angles.
206 void set_orientation( ALfloat *dir, ALfloat inner_angle=360.0,
207 ALfloat outer_angle=360.0,
208 ALfloat outer_gain=0.0);
211 * Set velocity of sound source (uses same coordinate system as opengl)
213 void set_source_vel( ALfloat *vel , ALfloat *listener_vel );
217 * Set reference distance of sound (the distance where the gain
220 void set_reference_dist( ALfloat dist );
224 * Set maximume distance of sound (the distance where the sound is
227 void set_max_dist( ALfloat dist );
230 * Load a sound file into a memory buffer only.
232 ALvoid* load_file(const char *path, const char *file);
236 #endif // _SG_SAMPLE_HXX