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Move the FlightGear sound code over to SimGear

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This commit is contained in:
ehofman
2003-05-09 17:29:06 +00:00
parent 68b2c9e7d3
commit e8cb3cbfa4
10 changed files with 1150 additions and 0 deletions
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1
configure.ac
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@@ -423,6 +423,7 @@ AC_CONFIG_FILES([ \
simgear/serial/Makefile \
simgear/sky/Makefile \
simgear/sky/clouds3d/Makefile \
simgear/sound/Makefile \
simgear/threads/Makefile \
simgear/timing/Makefile \
simgear/xgl/Makefile \

1
simgear/Makefile.am
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@@ -29,6 +29,7 @@ SUBDIRS = \
screen \
serial \
sky \
sound \
$(SGTHREAD_DIR) \
timing \
xgl

1
simgear/compatibility/Makefile.am
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@@ -27,4 +27,5 @@ include_HEADERS = \
cstddef \
ctime \
iomanip \
new \
streambuf

12
simgear/compatibility/new Normal file
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@@ -0,0 +1,12 @@
#ifndef __SG_NEW
#define __SG_NEW 1
#if defined(sgi) && !defined(__GNUC__)
# include <new.h>
#endif
#endif // !__SG_NEW

3
simgear/sound/.cvsignore Normal file
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@@ -0,0 +1,3 @@
.deps
Makefile
Makefile.in

11
simgear/sound/Makefile.am Normal file
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@@ -0,0 +1,11 @@
includedir = @includedir@/sound
lib_LIBRARIES = libsgsound.a
noinst_HEADERS =
include_HEADERS = sound.hxx soundmgr.hxx
libsgsound_a_SOURCES = sound.cxx soundmgr.cxx
INCLUDES = -I$(top_srcdir)

408
simgear/sound/sound.cxx Normal file
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@@ -0,0 +1,408 @@
// sound.cxx -- Sound class implementation
//
// Started by Erik Hofman, February 2002
// (Reuses some code from fg_fx.cxx created by David Megginson)
//
// Copyright (C) 2002 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#include <simgear/compiler.h>
#ifdef SG_HAVE_STD_INCLUDES
# include <cmath>
#else
# include <math.h>
#endif
#include <string.h>
#include <simgear/debug/logstream.hxx>
#include <simgear/props/condition.hxx>
#include "sound.hxx"
// static double _snd_lin(double v) { return v; }
static double _snd_inv(double v) { return (v == 0) ? 1e99 : 1/v; }
static double _snd_abs(double v) { return (v >= 0) ? v : -v; }
static double _snd_sqrt(double v) { return (v < 0) ? sqrt(-v) : sqrt(v); }
static double _snd_log10(double v) { return (v < 1) ? 0 : log10(v); }
static double _snd_log(double v) { return (v < 1) ? 0 : log(v); }
// static double _snd_sqr(double v) { return pow(v, 2); }
// static double _snd_pow3(double v) { return pow(v, 3); }
static const struct {
char *name;
double (*fn)(double);
} __sound_fn[] = {
// {"lin", _snd_lin},
{"inv", _snd_inv},
{"abs", _snd_abs},
{"sqrt", _snd_sqrt},
{"log", _snd_log10},
{"ln", _snd_log},
// {"sqr", _snd_sqr},
// {"pow3", _snd_pow3},
{"", NULL}
};
Sound::Sound()
: _sample(NULL),
_condition(NULL),
_property(NULL),
_active(false),
_name(""),
_mode(Sound::ONCE),
_prev_value(0),
_dt_play(0.0),
_dt_stop(0.0),
_stopping(0.0)
{
}
Sound::~Sound()
{
_mgr->get_scheduler()->stopSample(_sample->get_sample());
if (_property)
delete _property;
if (_condition)
delete _condition;
_volume.clear();
_pitch.clear();
delete _sample;
}
void
Sound::init(SGPropertyNode *root, SGPropertyNode *node, SoundMgr *sndmgr,
const string &path)
{
//
// set global sound properties
//
_name = node->getStringValue("name", "");
SG_LOG(SG_GENERAL, SG_INFO, "Loading sound information for: " << _name );
const char *mode_str = node->getStringValue("mode", "");
if ( !strcmp(mode_str, "looped") ) {
_mode = Sound::LOOPED;
} else if ( !strcmp(mode_str, "in-transit") ) {
_mode = Sound::IN_TRANSIT;
} else {
_mode = Sound::ONCE;
if ( strcmp(mode_str, "") )
SG_LOG(SG_GENERAL,SG_INFO, " Unknown sound mode, default to 'once'");
}
_property = root->getNode(node->getStringValue("property", ""), true);
SGPropertyNode *condition = node->getChild("condition");
if (condition != NULL)
_condition = fgReadCondition(root, condition);
if (!_property && !_condition)
SG_LOG(SG_GENERAL, SG_WARN,
" Neither a condition nor a property specified");
//
// set volume properties
//
unsigned int i;
float v = 0.0;
vector<SGPropertyNode_ptr> kids = node->getChildren("volume");
for (i = 0; (i < kids.size()) && (i < Sound::MAXPROP); i++) {
_snd_prop volume = {NULL, NULL, NULL, 1.0, 0.0, 0.0, 0.0, false};
if (strcmp(kids[i]->getStringValue("property"), ""))
volume.prop = root->getNode(kids[i]->getStringValue("property", ""), true);
const char *intern_str = kids[i]->getStringValue("internal", "");
if (!strcmp(intern_str, "dt_play"))
volume.intern = &_dt_play;
else if (!strcmp(intern_str, "dt_stop"))
volume.intern = &_dt_stop;
if ((volume.factor = kids[i]->getDoubleValue("factor", 1.0)) != 0.0)
if (volume.factor < 0.0) {
volume.factor = -volume.factor;
volume.subtract = true;
}
const char *type_str = kids[i]->getStringValue("type", "");
if ( strcmp(type_str, "") ) {
for (int j=0; __sound_fn[j].fn; j++)
if ( !strcmp(type_str, __sound_fn[j].name) ) {
volume.fn = __sound_fn[j].fn;
break;
}
if (!volume.fn)
SG_LOG(SG_GENERAL,SG_INFO,
" Unknown volume type, default to 'lin'");
}
volume.offset = kids[i]->getDoubleValue("offset", 0.0);
if ((volume.min = kids[i]->getDoubleValue("min", 0.0)) < 0.0)
SG_LOG( SG_GENERAL, SG_WARN,
"Volume minimum value below 0. Forced to 0.");
volume.max = kids[i]->getDoubleValue("max", 0.0);
if (volume.max && (volume.max < volume.min) )
SG_LOG(SG_GENERAL,SG_ALERT,
" Volume maximum below minimum. Neglected.");
_volume.push_back(volume);
v += volume.offset;
}
//
// set pitch properties
//
float p = 0.0;
kids = node->getChildren("pitch");
for (i = 0; (i < kids.size()) && (i < Sound::MAXPROP); i++) {
_snd_prop pitch = {NULL, NULL, NULL, 1.0, 1.0, 0.0, 0.0, false};
if (strcmp(kids[i]->getStringValue("property", ""), ""))
pitch.prop = root->getNode(kids[i]->getStringValue("property", ""), true);
const char *intern_str = kids[i]->getStringValue("internal", "");
if (!strcmp(intern_str, "dt_play"))
pitch.intern = &_dt_play;
else if (!strcmp(intern_str, "dt_stop"))
pitch.intern = &_dt_stop;
if ((pitch.factor = kids[i]->getDoubleValue("factor", 1.0)) != 0.0)
if (pitch.factor < 0.0) {
pitch.factor = -pitch.factor;
pitch.subtract = true;
}
const char *type_str = kids[i]->getStringValue("type", "");
if ( strcmp(type_str, "") ) {
for (int j=0; __sound_fn[j].fn; j++)
if ( !strcmp(type_str, __sound_fn[j].name) ) {
pitch.fn = __sound_fn[j].fn;
break;
}
if (!pitch.fn)
SG_LOG(SG_GENERAL,SG_INFO,
" Unknown pitch type, default to 'lin'");
}
pitch.offset = kids[i]->getDoubleValue("offset", 1.0);
if ((pitch.min = kids[i]->getDoubleValue("min", 0.0)) < 0.0)
SG_LOG(SG_GENERAL,SG_WARN,
" Pitch minimum value below 0. Forced to 0.");
pitch.max = kids[i]->getDoubleValue("max", 0.0);
if (pitch.max && (pitch.max < pitch.min) )
SG_LOG(SG_GENERAL,SG_ALERT,
" Pitch maximum below minimum. Neglected");
_pitch.push_back(pitch);
p += pitch.offset;
}
//
// Initialize the sample
//
_mgr = sndmgr;
if ((_sample = _mgr->find(_name)) == NULL)
_sample = _mgr->add(_name, path.c_str(), node->getStringValue("path", ""));
_sample->set_volume(v);
_sample->set_pitch(p);
}
void
Sound::update (double dt)
{
double curr_value = 0.0;
//
// If the state changes to false, stop playing.
//
if (_property)
curr_value = _property->getDoubleValue();
if ( // Lisp, anyone?
(_condition && !_condition->test()) ||
(!_condition && _property &&
(
!curr_value ||
( (_mode == Sound::IN_TRANSIT) && (curr_value == _prev_value) )
)
)
)
{
if ((_mode != Sound::IN_TRANSIT) || (_stopping > MAX_TRANSIT_TIME)) {
if (_sample->is_playing()) {
SG_LOG(SG_GENERAL, SG_INFO, "Stopping audio after " << _dt_play
<< " sec: " << _name );
_sample->stop( _mgr->get_scheduler() );
}
_active = false;
_dt_stop += dt;
_dt_play = 0.0;
} else {
_stopping += dt;
}
return;
}
//
// If the mode is ONCE and the sound is still playing,
// we have nothing to do anymore.
//
if (_active && (_mode == Sound::ONCE)) {
if (!_sample->is_playing()) {
_dt_stop += dt;
_dt_play = 0.0;
} else {
_dt_play += dt;
}
return;
}
//
// Update the playing time, cache the current value and
// clear the delay timer.
//
_dt_play += dt;
_prev_value = curr_value;
_stopping = 0.0;
//
// Update the volume
//
int i;
int max = _volume.size();
double volume = 1.0;
double volume_offset = 0.0;
for(i = 0; i < max; i++) {
double v = 1.0;
if (_volume[i].prop)
v = _volume[i].prop->getDoubleValue();
else if (_volume[i].intern)
v = *_volume[i].intern;
if (_volume[i].fn)
v = _volume[i].fn(v);
v *= _volume[i].factor;
if (_volume[i].max && (v > _volume[i].max))
v = _volume[i].max;
else if (v < _volume[i].min)
v = _volume[i].min;
if (_volume[i].subtract) // Hack!
volume = _volume[i].offset - v;
else {
volume_offset += _volume[i].offset;
volume *= v;
}
}
//
// Update the pitch
//
max = _pitch.size();
double pitch = 1.0;
double pitch_offset = 0.0;
for(i = 0; i < max; i++) {
double p = 1.0;
if (_pitch[i].prop)
p = _pitch[i].prop->getDoubleValue();
else if (_pitch[i].intern)
p = *_pitch[i].intern;
if (_pitch[i].fn)
p = _pitch[i].fn(p);
p *= _pitch[i].factor;
if (_pitch[i].max && (p > _pitch[i].max))
p = _pitch[i].max;
else if (p < _pitch[i].min)
p = _pitch[i].min;
if (_pitch[i].subtract) // Hack!
pitch = _pitch[i].offset - p;
else {
pitch_offset += _pitch[i].offset;
pitch *= p;
}
}
//
// Change sample state
//
_sample->set_pitch( pitch_offset + pitch );
_sample->set_volume( volume_offset + volume );
//
// Do we need to start playing the sample?
//
if (!_active) {
if (_mode == Sound::ONCE)
_sample->play(_mgr->get_scheduler(), false);
else
_sample->play(_mgr->get_scheduler(), true);
SG_LOG(SG_GENERAL, SG_INFO, "Playing audio after " << _dt_stop
<< " sec: " << _name);
SG_LOG(SG_GENERAL, SG_BULK,
"Playing " << ((_mode == ONCE) ? "once" : "looped"));
_active = true;
_dt_stop = 0.0;
}
}

96
simgear/sound/sound.hxx Normal file
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@@ -0,0 +1,96 @@
// sound.hxx -- Sound class implementation
//
// Started by Erik Hofman, February 2002
//
// Copyright (C) 2002 Erik Hofman - erik@ehofman.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#ifndef _SG_SOUND_HXX
#define _SG_SOUND_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/compiler.h>
#include <simgear/props/condition.hxx>
#include "soundmgr.hxx"
static const double MAX_TRANSIT_TIME = 0.1; // 100 ms.
/**
* Class for handling one sound event.
*
*/
class Sound
{
public:
Sound();
virtual ~Sound();
virtual void init (SGPropertyNode *, SGPropertyNode *, SoundMgr *,
const string &);
virtual void update (double dt);
void stop();
protected:
enum { MAXPROP=5 };
enum { ONCE=0, LOOPED, IN_TRANSIT };
enum { LEVEL=0, INVERTED, FLIPFLOP };
// Sound properties
typedef struct {
SGPropertyNode * prop;
double (*fn)(double);
double *intern;
double factor;
double offset;
double min;
double max;
bool subtract;
} _snd_prop;
private:
SoundMgr * _mgr;
SimpleSound * _sample;
FGCondition * _condition;
SGPropertyNode * _property;
bool _active;
string _name;
int _mode;
double _prev_value;
double _dt_play;
double _dt_stop;
double _stopping; // time after the sound should have stopped.
// This is usefull for lost packets in in-trasit mode.
vector<_snd_prop> _volume;
vector<_snd_prop> _pitch;
};
#endif // _SG_SOUND_HXX

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simgear/sound/soundmgr.cxx Normal file
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// soundmgr.cxx -- Sound effect management class
//
// Sound manager initially written by David Findlay
// <david_j_findlay@yahoo.com.au> 2001
//
// C++-ified by Curtis Olson, started March 2001.
//
// Copyright (C) 2001 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#include <iostream>
#include <simgear/debug/logstream.hxx>
#include <simgear/misc/sg_path.hxx>
#include "soundmgr.hxx"
#define SOUND_SAFETY_MULT 3
#define MAX_SOUND_SAFETY ( 1.0 / SOUND_SAFETY_MULT )
//
// SimpleSound
//
// constructor
SimpleSound::SimpleSound( const char *path, const char *file )
: sample(NULL),
pitch_envelope(NULL),
volume_envelope(NULL),
pitch(1.0),
volume(1.0)
{
SGPath slfile( path );
if ( file )
slfile.append( file );
sample = new slSample ( slfile.c_str() );
pitch_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
volume_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
pitch_envelope->setStep ( 0, 0.01, 1.0 );
volume_envelope->setStep ( 0, 0.01, 1.0 );
}
SimpleSound::SimpleSound( unsigned char *buffer, int len )
: pitch(1.0),
volume(1.0)
{
sample = new slSample ( buffer, len );
pitch_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
volume_envelope = new slEnvelope( 1, SL_SAMPLE_ONE_SHOT );
pitch_envelope->setStep ( 0, 0.01, 1.0 );
volume_envelope->setStep ( 0, 0.01, 1.0 );
}
// destructor
SimpleSound::~SimpleSound() {
delete pitch_envelope;
delete volume_envelope;
delete sample;
}
void SimpleSound::play( slScheduler *sched, bool looped ) {
// make sure sound isn't already playing
if ( sample->getPlayCount() > 0 ) {
sched->stopSample(sample);
// return;
}
if ( looped ) {
sched->loopSample(sample);
} else {
sched->playSample(sample);
}
sched->addSampleEnvelope(sample, 0, 0, pitch_envelope, SL_PITCH_ENVELOPE);
sched->addSampleEnvelope(sample, 0, 1, volume_envelope, SL_VOLUME_ENVELOPE);
}
void SimpleSound::stop( slScheduler *sched, bool quick ) {
sched->stopSample( sample );
}
//
// Sound Manager
//
// constructor
SoundMgr::SoundMgr() {
audio_sched = new slScheduler( 8000 );
if ( audio_sched->notWorking() ) {
SG_LOG( SG_GENERAL, SG_ALERT, "Audio initialization failed!" );
} else {
audio_sched -> setMaxConcurrent ( 6 );
audio_mixer = new smMixer;
SG_LOG( SG_GENERAL, SG_INFO,
"Rate = " << audio_sched->getRate()
<< " Bps = " << audio_sched->getBps()
<< " Stereo = " << audio_sched->getStereo() );
}
}
// destructor
SoundMgr::~SoundMgr() {
//
// Remove the samples from the sample manager.
//
sample_map_iterator sample_current = samples.begin();
sample_map_iterator sample_end = samples.end();
for ( ; sample_current != sample_end; ++sample_current ) {
sample_ref *sr = sample_current->second;
audio_sched->stopSample(sr->sample);
delete sr->sample;
delete sr;
}
//
// Remove the sounds from the sound manager.
//
sound_map_iterator sound_current = sounds.begin();
sound_map_iterator sound_end = sounds.end();
for ( ; sound_current != sound_end; ++sound_current ) {
SimpleSound *s = sound_current->second;
audio_sched->stopSample(s->get_sample());
delete s->get_sample();
delete s;
}
delete audio_sched;
delete audio_mixer;
}
// initialize the sound manager
void SoundMgr::init() {
safety = MAX_SOUND_SAFETY;
// audio_mixer -> setMasterVolume ( 80 ) ; /* 80% of max volume. */
audio_sched -> setSafetyMargin ( SOUND_SAFETY_MULT * safety ) ;
//
// Remove the samples from the sample manager.
//
sample_map_iterator sample_current = samples.begin();
sample_map_iterator sample_end = samples.end();
for ( ; sample_current != sample_end; ++sample_current ) {
sample_ref *sr = sample_current->second;
audio_sched->stopSample(sr->sample);
delete sr->sample;
delete sr;
}
samples.clear();
//
// Remove the sounds from the sound manager.
//
sound_map_iterator sound_current = sounds.begin();
sound_map_iterator sound_end = sounds.end();
for ( ; sound_current != sound_end; ++sound_current ) {
SimpleSound *s = sound_current->second;
audio_sched->stopSample(s->get_sample());
delete s->get_sample();
delete s;
}
sounds.clear();
}
void SoundMgr::bind ()
{
// no properties yet
}
void SoundMgr::unbind ()
{
// no properties yet
}
// run the audio scheduler
void SoundMgr::update( double dt ) {
if ( dt > safety ) {
safety = dt;
} else {
safety = safety * 0.99 + dt * 0.01;
}
if ( safety > MAX_SOUND_SAFETY ) {
safety = MAX_SOUND_SAFETY;
}
// cout << "safety = " << safety << endl;
audio_sched -> setSafetyMargin ( SOUND_SAFETY_MULT * safety ) ;
if ( !audio_sched->not_working() )
audio_sched -> update();
}
void
SoundMgr::pause ()
{
audio_sched->pauseSample(0, 0);
}
void
SoundMgr::resume ()
{
audio_sched->resumeSample(0, 0);
}
// add a sound effect, return true if successful
bool SoundMgr::add( SimpleSound *sound, const string& refname ) {
sound_map_iterator sound_it = sounds.find( refname );
if ( sound_it != sounds.end() ) {
// sound already exists
return false;
}
sample_map_iterator sample_it = samples.find( refname );
if ( sample_it != samples.end() ) {
// this sound has existed in the past and it's sample is still
// here, delete the sample so we can replace it.
samples.erase( sample_it );
}
sample_ref *sr = new sample_ref;
sr->n=1;
sr->sample = sound->get_sample();
samples[refname] = sr;
sounds[refname] = sound;
return true;
}
// add a sound from a file, return the sample if successful, else return NULL
SimpleSound *SoundMgr::add( const string &refname,
const char *path, const char *file ) {
SimpleSound *sound;
SGPath slfile( path );
if ( file )
slfile.append( file );
if ( slfile.str().empty() )
return NULL;
sample_map_iterator it = samples.find(slfile.str());
if (it == samples.end()) {
sound = new SimpleSound(slfile.c_str());
sounds[refname] = sound;
sample_ref *sr = new sample_ref;
sr->n=1;
sr->sample = sound->get_sample();
samples[slfile.str()] = sr;
} else {
sample_ref *sr = it->second;
sr->n++;
sound =
new SimpleSound(sr->sample->getBuffer(), sr->sample->getLength());
sounds[refname] = sound;
}
return sound;
}
// remove a sound effect, return true if successful
bool SoundMgr::remove( const string &refname ) {
sound_map_iterator it = sounds.find( refname );
if ( it != sounds.end() ) {
// first stop the sound from playing (so we don't bomb the
// audio scheduler)
SimpleSound *sample = it->second;
// cout << "Playing " << sample->get_sample()->getPlayCount()
// << " instances!" << endl;
audio_sched->stopSample( sample->get_sample() );
audio_sched->addSampleEnvelope( sample->get_sample(), 0, 0,
NULL,
SL_PITCH_ENVELOPE );
audio_sched->addSampleEnvelope( sample->get_sample(), 0, 1,
NULL,
SL_VOLUME_ENVELOPE );
// must call audio_sched->update() after stopping the sound
// but before deleting it.
audio_sched -> update();
// cout << "Still playing " << sample->get_sample()->getPlayCount()
// << " instances!" << endl;
//
// FIXME:
// Due to the change in the sound manager, samples live
// until the sound manager gets removed.
//
// delete sample;
sounds.erase( it );
// cout << "sndmgr: removed -> " << refname << endl;
return true;
} else {
// cout << "sndmgr: failed remove -> " << refname << endl;
return false;
}
}
// return true of the specified sound exists in the sound manager system
bool SoundMgr::exists( const string &refname ) {
sound_map_iterator it = sounds.find( refname );
if ( it != sounds.end() ) {
return true;
} else {
return false;
}
}
// return a pointer to the SimpleSound if the specified sound exists
// in the sound manager system, otherwise return NULL
SimpleSound *SoundMgr::find( const string &refname ) {
sound_map_iterator it = sounds.find( refname );
if ( it != sounds.end() ) {
return it->second;
} else {
return NULL;
}
}
// tell the scheduler to play the indexed sample in a continuous
// loop
bool SoundMgr::play_looped( const string &refname ) {
SimpleSound *sample;
if ((sample = find( refname )) == NULL)
return false;
sample->play(audio_sched, true);
return true;
}
// tell the scheduler to play the indexed sample once
bool SoundMgr::play_once( const string& refname ) {
SimpleSound *sample;
if ((sample = find( refname )) == NULL)
return false;
sample->play(audio_sched, false);
return true;
}
// return true of the specified sound is currently being played
bool SoundMgr::is_playing( const string& refname ) {
SimpleSound *sample;
if ((sample = find( refname )) == NULL)
return false;
return (sample->get_sample()->getPlayCount() > 0 );
}
// immediate stop playing the sound
bool SoundMgr::stop( const string& refname ) {
SimpleSound *sample;
if ((sample = find( refname )) == NULL)
return false;
audio_sched->stopSample( sample->get_sample() );
return true;
}

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// soundmgr.hxx -- Sound effect management class
//
// Sound manager initially written by David Findlay
// <david_j_findlay@yahoo.com.au> 2001
//
// C++-ified by Curtis Olson, started March 2001.
//
// Copyright (C) 2001 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#ifndef _SG_SOUNDMGR_HXX
#define _SG_SOUNDMGR_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/compiler.h>
#include <simgear/timing/timestamp.hxx>
#include STL_STRING
#include <map>
#include <plib/sl.h>
#include <plib/sm.h>
SG_USING_STD(map);
SG_USING_STD(string);
// manages everything we need to know for an individual sound sample
class SimpleSound {
private:
slSample *sample;
slEnvelope *pitch_envelope;
slEnvelope *volume_envelope;
double pitch;
double volume;
public:
SimpleSound( const char *path, const char *file = NULL );
SimpleSound( unsigned char *buffer, int len );
~SimpleSound();
void play( slScheduler *sched, bool looped );
void stop( slScheduler *sched, bool quick = true );
inline void play_once( slScheduler *sched ) { play( sched, false); }
inline void play_looped( slScheduler *sched ) { play( sched, true); }
inline bool is_playing( ) {
return ( sample->getPlayCount() > 0 );
}
inline double get_pitch() const { return pitch; }
inline void set_pitch( double p ) {
pitch = p;
pitch_envelope->setStep( 0, 0.01, pitch );
}
inline double get_volume() const { return volume; }
inline void set_volume( double v ) {
volume = v;
volume_envelope->setStep( 0, 0.01, volume );
}
inline slSample *get_sample() { return sample; }
inline slEnvelope *get_pitch_envelope() { return pitch_envelope; }
inline slEnvelope *get_volume_envelope() { return volume_envelope; }
};
typedef struct {
int n;
slSample *sample;
} sample_ref;
typedef map < string, sample_ref * > sample_map;
typedef sample_map::iterator sample_map_iterator;
typedef sample_map::const_iterator const_sample_map_iterator;
typedef map < string, SimpleSound * > sound_map;
typedef sound_map::iterator sound_map_iterator;
typedef sound_map::const_iterator const_sound_map_iterator;
class SoundMgr
{
slScheduler *audio_sched;
smMixer *audio_mixer;
sound_map sounds;
sample_map samples;
double safety;
public:
SoundMgr();
~SoundMgr();
/**
* (re) initialize the sound manager.
*/
void init();
/**
* Bind properties for the sound manager.
*/
void bind ();
/**
* Unbind properties for the sound manager.
*/
void unbind ();
/**
* Run the audio scheduler.
*/
void update(double dt);
/**
* Pause all sounds.
*/
void pause ();
/**
* Resume all sounds.
*/
void resume ();
// is audio working?
inline bool is_working() const { return !audio_sched->notWorking(); }
// reinitialize the sound manager
inline void reinit() { init(); }
// add a sound effect, return true if successful
bool add( SimpleSound *sound, const string& refname);
// add a sound file, return the sample if successful, else return NULL
SimpleSound *add( const string& refname,
const char *path, const char *file = NULL );
// remove a sound effect, return true if successful
bool remove( const string& refname );
// return true of the specified sound exists in the sound manager system
bool exists( const string& refname );
// return a pointer to the SimpleSound if the specified sound
// exists in the sound manager system, otherwise return NULL
SimpleSound *find( const string& refname );
// tell the scheduler to play the indexed sample in a continuous
// loop
bool play_looped( const string& refname );
// tell the scheduler to play the indexed sample once
bool play_once( const string& refname );
// return true of the specified sound is currently being played
bool is_playing( const string& refname );
// immediate stop playing the sound
bool stop( const string& refname );
// return the audio scheduler
inline slScheduler *get_scheduler( ) { return audio_sched; };
};
#endif // _SG_SOUNDMGR_HXX