Ooops, missed adding this the first time.

src/Sound/soundmgr.hxx

@@ -0,0 +1,117 @@
+// 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 _SOUNDMGR_HXX
+#define _SOUNDMGR_HXX
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <simgear/compiler.h>
+
+#include STL_STRING
+#include <map>
+
+#include <plib/sl.h>
+#include <plib/sm.h>
+
+FG_USING_STD(map);
+FG_USING_STD(string);
+
+
+// manages everything we need to know for an individual sound sample
+class FGSimpleSound {
+
+    slSample *sample;
+    slEnvelope *pitch_envelope;
+    slEnvelope *volume_envelope;
+    double pitch;
+    double volume;
+
+public:
+
+    FGSimpleSound( string file );
+    FGSimpleSound( unsigned char *buffer, int len );
+    ~FGSimpleSound();
+
+    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 map < string, FGSimpleSound * > sound_map;
+typedef sound_map::iterator sound_map_iterator;
+typedef sound_map::const_iterator const_sound_map_iterator;
+
+
+class FGSoundMgr {
+
+    slScheduler *audio_sched;
+    smMixer *audio_mixer;
+    sound_map sounds;
+
+public:
+
+    FGSoundMgr();
+    ~FGSoundMgr();
+
+    // initialize the sound manager
+    bool init();
+
+    // run the audio scheduler
+    bool update();
+
+    // is audio working?
+    inline bool is_working() const { return !audio_sched->not_working(); }
+
+    // add a sound effect, return the index of the sound
+    bool add( FGSimpleSound *sound, 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 );
+};
+
+
+#endif // _SOUNDMGR_HXX
+
+