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.
8 // Copyright (C) 2001 Curtis L. Olson - curt@flightgear.org
10 // This program is free software; you can redistribute it and/or
11 // modify it under the terms of the GNU General Public License as
12 // published by the Free Software Foundation; either version 2 of the
13 // License, or (at your option) any later version.
15 // This program is distributed in the hope that it will be useful, but
16 // WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 // General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this program; if not, write to the Free Software
22 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <simgear/debug/logstream.hxx>
28 #include <simgear/misc/fgpath.hxx>
30 #include <Main/globals.hxx>
32 #include "soundmgr.hxx"
36 FGSimpleSound::FGSimpleSound( string file ) {
37 FGPath slfile( globals->get_fg_root() );
38 slfile.append( file );
39 sample = new slSample ( (char *)slfile.c_str() );
40 pitch_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
41 volume_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
42 pitch_envelope->setStep ( 0, 0.01, 1.0 );
43 volume_envelope->setStep ( 0, 0.01, 1.0 );
46 FGSimpleSound::FGSimpleSound( unsigned char *buffer, int len ) {
47 sample = new slSample ( buffer, len );
48 pitch_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
49 volume_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
50 pitch_envelope->setStep ( 0, 0.01, 1.0 );
51 volume_envelope->setStep ( 0, 0.01, 1.0 );
55 FGSimpleSound::~FGSimpleSound() {
56 delete pitch_envelope;
57 delete volume_envelope;
63 FGSoundMgr::FGSoundMgr() {
64 audio_sched = new slScheduler( 8000 );
65 audio_mixer = new smMixer;
67 FG_LOG( FG_GENERAL, FG_INFO,
68 "Rate = " << audio_sched->getRate()
69 << " Bps = " << audio_sched->getBps()
70 << " Stereo = " << audio_sched->getStereo() );
74 FGSoundMgr::~FGSoundMgr() {
75 sound_map_iterator current = sounds.begin();
76 sound_map_iterator end = sounds.end();
77 for ( ; current != end; ++current ) {
78 FGSimpleSound *s = current->second;
79 delete s->get_sample();
88 // initialize the sound manager
89 bool FGSoundMgr::init() {
90 audio_mixer -> setMasterVolume ( 80 ) ; /* 80% of max volume. */
91 audio_sched -> setSafetyMargin ( 1.0 ) ;
93 sound_map_iterator current = sounds.begin();
94 sound_map_iterator end = sounds.end();
95 for ( ; current != end; ++current ) {
96 FGSimpleSound *s = current->second;
97 delete s->get_sample();
102 if ( audio_sched->not_working() ) {
110 // run the audio scheduler
111 bool FGSoundMgr::update() {
112 if ( !audio_sched->not_working() ) {
113 audio_sched -> update();
121 // add a sound effect
122 bool FGSoundMgr::add( FGSimpleSound *sound, const string& refname ) {
123 sounds[refname] = sound;
129 // tell the scheduler to play the indexed sample in a continuous
131 bool FGSoundMgr::play_looped( const string& refname ) {
132 sound_map_iterator it = sounds.find( refname );
133 if ( it != sounds.end() ) {
134 FGSimpleSound *sample = it->second;
135 audio_sched->loopSample( sample->get_sample() );
136 audio_sched->addSampleEnvelope( sample->get_sample(), 0, 0,
137 sample->get_pitch_envelope(),
139 audio_sched->addSampleEnvelope( sample->get_sample(), 0, 1,
140 sample->get_volume_envelope(),
141 SL_VOLUME_ENVELOPE );
150 // tell the scheduler to play the indexed sample once
151 bool FGSoundMgr::FGSoundMgr::play_once( const string& refname ) {
152 sound_map_iterator it = sounds.find( refname );
153 if ( it != sounds.end() ) {
154 FGSimpleSound *sample = it->second;
155 audio_sched->playSample( sample->get_sample() );
156 audio_sched->addSampleEnvelope( sample->get_sample(), 0, 0,
157 sample->get_pitch_envelope(),
159 audio_sched->addSampleEnvelope( sample->get_sample(), 0, 1,
160 sample->get_volume_envelope(),
161 SL_VOLUME_ENVELOPE );