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Erik Hofman:

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This patch adds "elapsed time" support to the sound code.
It is now possible to define <internal>dt_play</internal> or
<internal>dt_stop</internal> instead of a propery in the <volume> and
<pitch> sections of the configuration file.
This commit is contained in:
curt 2002-05-20 16:28:21 +00:00
parent 2cafd466e2
commit e380891c40
3 changed files with 72 additions and 48 deletions
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10
docs-mini/README.xmlsound
View file

@ -155,8 +155,18 @@ Configuration description:
<property>
Defins which property supplies the value for the calculation.
Either a <property> or an <internal> should be defined.
The value is treatened as a floating point number.
<internal>
Defins which internal variable should be used for the calculation.
The value is treatened as a floating point number.
The following internals are available at this time:
dt_play: the number of seconds since the sound started playing.
dt_stop: the number of seconds after the sound has stopped.
<type>
Defines the function that should be used upon the property
before it is used for calculating the net result:

102
src/Sound/fg_sound.cxx
View file

@ -65,6 +65,8 @@ FGSound::FGSound()
: _sample(NULL),
_condition(NULL),
_property(NULL),
_dt_play(0.0),
_dt_stop(0.0),
_prev_value(0),
_name(""),
_mode(FGSound::ONCE)
@ -73,7 +75,12 @@ FGSound::FGSound()
FGSound::~FGSound()
{
delete _condition;
if (_property)
delete _property;
if (_condition)
delete _condition;
delete _sample;
}
@ -118,22 +125,23 @@ FGSound::init(SGPropertyNode *node)
float v = 0.0;
vector<SGPropertyNode_ptr> kids = node->getChildren("volume");
for (i = 0; (i < kids.size()) && (i < FGSound::MAXPROP); i++) {
_snd_prop volume;
_snd_prop volume = {NULL, NULL, NULL, 1.0, 0.0, 0.0, 0.0, false};
volume.prop = fgGetNode(kids[i]->getStringValue("property"), true);
if (strcmp(kids[i]->getStringValue("property"), ""))
volume.prop = fgGetNode(kids[i]->getStringValue("property"), true);
if ((volume.factor = kids[i]->getDoubleValue("factor")) == 0.0)
volume.factor = 1.0;
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;
else
if ((volume.factor = kids[i]->getDoubleValue("factor")) != 0.0)
if (volume.factor < 0.0) {
volume.factor = -volume.factor;
volume.subtract = true;
}
} else
volume.subtract = false;
volume.fn = NULL;
const char *type_str = kids[i]->getStringValue("type");
if ( strcmp(type_str, "") ) {
@ -150,21 +158,15 @@ FGSound::init(SGPropertyNode *node)
volume.offset = kids[i]->getDoubleValue("offset");
if ((volume.min = kids[i]->getDoubleValue("min")) < 0.0) {
if ((volume.min = kids[i]->getDoubleValue("min")) < 0.0)
SG_LOG( SG_GENERAL, SG_WARN,
"Volume minimum value below 0. Forced to 0.");
volume.min = 0.0;
}
volume.max = kids[i]->getDoubleValue("max");
if (volume.max && (volume.max < volume.min) ) {
if (volume.max && (volume.max < volume.min) )
SG_LOG(SG_GENERAL,SG_ALERT,
" Volume maximum below minimum. Neglected.");
volume.max = 0.0;
}
_volume.push_back(volume);
v += volume.offset;
@ -177,22 +179,23 @@ FGSound::init(SGPropertyNode *node)
float p = 0.0;
kids = node->getChildren("pitch");
for (i = 0; (i < kids.size()) && (i < FGSound::MAXPROP); i++) {
_snd_prop pitch;
_snd_prop pitch = {NULL, NULL, NULL, 1.0, 1.0, 0.0, 0.0, false};
pitch.prop = fgGetNode(kids[i]->getStringValue("property"), true);
if (strcmp(kids[i]->getStringValue("property"), ""))
pitch.prop = fgGetNode(kids[i]->getStringValue("property"), true);
if ((pitch.factor = kids[i]->getDoubleValue("factor")) == 0.0)
pitch.factor = 1.0;
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;
else
if ((pitch.factor = kids[i]->getDoubleValue("factor")) != 0.0)
if (pitch.factor < 0.0) {
pitch.factor = -pitch.factor;
pitch.subtract = true;
}
} else
pitch.subtract = false;
pitch.fn = NULL;
const char *type_str = kids[i]->getStringValue("type");
if ( strcmp(type_str, "") ) {
@ -207,24 +210,17 @@ FGSound::init(SGPropertyNode *node)
" Unknown pitch type, default to 'lin'");
}
if ((pitch.offset = kids[i]->getDoubleValue("offset")) == 0.0)
pitch.offset = 1.0;
pitch.offset = kids[i]->getDoubleValue("offset");
if ((pitch.min = kids[i]->getDoubleValue("min")) < 0.0) {
if ((pitch.min = kids[i]->getDoubleValue("min")) < 0.0)
SG_LOG(SG_GENERAL,SG_WARN,
" Pitch minimum value below 0. Forced to 0.");
pitch.min = 0.0;
}
pitch.max = kids[i]->getDoubleValue("max");
if (pitch.max && (pitch.max < pitch.min) ) {
if (pitch.max && (pitch.max < pitch.min) )
SG_LOG(SG_GENERAL,SG_ALERT,
" Pitch maximum below minimum. Neglected");
pitch.max = 0.0;
}
_pitch.push_back(pitch);
p += pitch.offset;
}
@ -272,10 +268,12 @@ FGSound::update (double dt)
)
{
_active = false;
_dt_stop += dt;
if (_sample->is_playing()) {
SG_LOG(SG_GENERAL, SG_INFO, "Stopping sound: " << _name);
SG_LOG(SG_GENERAL, SG_INFO, "Stopping audio after " << _dt_play
<< " sec: " << _name );
_sample->stop( _mgr->get_scheduler() );
_dt_play = 0.0;
}
return;
@ -286,13 +284,14 @@ FGSound::update (double dt)
// If the mode is ONCE and the sound is still playing,
// we have nothing to do anymore.
//
if (_active && (_mode == FGSound::ONCE))
if (_dt_play && (_mode == FGSound::ONCE))
return;
//
// Cache current value;
// Cache current value and Update playing time
//
_prev_value = curr_value;
_dt_play += dt;
//
// Update the volume
@ -303,7 +302,13 @@ FGSound::update (double dt)
double volume_offset = 0.0;
for(i = 0; i < max; i++) {
double v = _volume[i].prop->getDoubleValue();
double v;
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);
@ -333,7 +338,13 @@ FGSound::update (double dt)
double pitch_offset = 0.0;
for(i = 0; i < max; i++) {
double p = _pitch[i].prop->getDoubleValue();
double p;
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);
@ -365,9 +376,10 @@ FGSound::update (double dt)
//
// Do we need to start playing the sample?
//
if (!_active) {
if (_dt_stop) {
_dt_stop = 0.0;
_active = true;
if (_mode == FGSound::ONCE)
_sample->play(_mgr->get_scheduler(), false);

8
src/Sound/fg_sound.hxx
View file

@ -61,6 +61,7 @@ protected:
typedef struct {
SGPropertyNode * prop;
double (*fn)(double);
double *intern;
double factor;
double offset;
double min;
@ -72,14 +73,15 @@ private:
FGSoundMgr * _mgr;
FGSimpleSound * _sample;
FGCondition * _condition;
SGPropertyNode * _property;
double _prev_value;
bool _active;
string _name;
int _mode;
double _prev_value;
double _dt_play;
double _dt_stop;
vector<_snd_prop> _volume;
vector<_snd_prop> _pitch;