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flightgear/src/Sound/fg_fx.cxx

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// fg_fx.cxx -- Sound effect management class implementation
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//
// Started by David Megginson, October 2001
// (Reuses some code from main.cxx, probably by Curtis Olson)
//
// Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
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//
// 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
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
// $Id$
#ifdef _MSC_VER
#pragma warning (disable: 4786)
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "fg_fx.hxx"
#include <Main/fg_props.hxx>
#include <simgear/props/props.hxx>
#include <simgear/misc/sg_path.hxx>
#include <simgear/sound/soundmgr_openal.hxx>
#include <simgear/sound/xmlsound.hxx>
FGFX::FGFX ( SGSoundMgr *smgr, const string &refname ) :
_enabled( fgGetNode("/sim/sound/effects/enabled", true) ),
_volume( fgGetNode("/sim/sound/effects/volume", true) ),
_avionics_enabled( fgGetNode("/sim/sound/avionics/enabled", true) ),
_avionics_volume( fgGetNode("/sim/sound/avionics/volume", true) ),
_avionics_external( fgGetNode("/sim/sound/avionics/external-view", true) ),
_internal( fgGetNode("/sim/current-view/internal", true) )
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{
SGSampleGroup::_smgr = smgr;
SGSampleGroup::_refname = refname;
SGSampleGroup::_smgr->add(this, refname);
_avionics = _smgr->find("avionics", true);
_avionics->tie_to_listener();
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}
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FGFX::~FGFX ()
{
for (unsigned int i = 0; i < _sound.size(); i++ ) {
delete _sound[i];
}
_sound.clear();
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}
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void
FGFX::init()
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{
SGPropertyNode *node = fgGetNode("/sim/sound", true);
string path_str = node->getStringValue("path");
SGPath path( globals->get_fg_root() );
if (path_str.empty()) {
SG_LOG(SG_GENERAL, SG_ALERT, "No path in /sim/sound/path");
return;
}
path.append(path_str.c_str());
SG_LOG(SG_GENERAL, SG_INFO, "Reading sound " << node->getName()
<< " from " << path.str());
SGPropertyNode root;
try {
readProperties(path.str(), &root);
} catch (const sg_exception &) {
SG_LOG(SG_GENERAL, SG_ALERT,
"Error reading file '" << path.str() << '\'');
return;
}
node = root.getNode("fx");
if(node) {
for (int i = 0; i < node->nChildren(); ++i) {
SGXmlSound *sound = new SGXmlSound();
try {
sound->init(globals->get_props(), node->getChild(i), this,
_avionics, globals->get_fg_root());
_sound.push_back(sound);
} catch ( sg_exception &e ) {
SG_LOG(SG_GENERAL, SG_ALERT, e.getFormattedMessage());
delete sound;
}
}
}
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}
void
FGFX::reinit()
{
_sound.clear();
init();
};
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void
FGFX::update (double dt)
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{
bool active = _avionics_external->getBoolValue() ||
_internal->getBoolValue();
if ( active && _avionics_enabled->getBoolValue() )
_avionics->resume(); // no-op if already in resumed state
else
_avionics->suspend();
_avionics->set_volume( _avionics_volume->getFloatValue() );
if ( _enabled->getBoolValue() ) {
set_volume( _volume->getDoubleValue() );
resume();
// update sound effects if not paused
for ( unsigned int i = 0; i < _sound.size(); i++ ) {
_sound[i]->update(dt);
}
SGSampleGroup::update(dt);
}
else
suspend();
}
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// end of fg_fx.cxx