oasissound.cpp

使用stl技术,(还没看,是听说的)

/******************************************************************************
 * This source file is part of Bad Camel Gaming
 * Copyright (C) 2003  Zephie Greyvenstein
 * See Readme.html for acknowledgements
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *****************************************************************************/

/******************************************************************************
 * FILENAME    : oasisSound.cpp
 * DESCRIPTION : Sound instance
 * AUTHOR      : Zephie Greyvenstein
 *****************************************************************************/

#include "oasisSound.h"
#include "oasisSoundResource.h"
#include "oasisException.h"
#include "oasisVector3.h"
#include "oasisAudioCommon.h"

#include "OgreLogManager.h"

namespace Oasis {
  
  sound::sound( ) {
    source = 0;
  
    alGenSources( 1, ( ALuint* )&source );
   
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not allocate source for sound",
      "sound::( )" );
    }

    alSourcef( source, AL_PITCH, 1 );      
    alSource3f( source, AL_VELOCITY, 0.0, 0.0, 0.0 );
    
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not set source for sound",
      "sound::( )" );
    }
  
    setVolume( 1 );
    setLooping( false );
    setPosition( vector3::ZERO );
  }
  
  sound::~sound( ) {
    clear( );
    alDeleteSources( 1, ( ALuint* )&source );
    
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not delete source for sound",
      "sound::~( )" );
    }
  }
 
  void sound::setVolume( const real newVolume ) {
    volume = newVolume;
    alSourcef( source, AL_MAX_GAIN, ( ALfloat )volume );
   
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not set volume for source",
      "sound::setVolume" );
    }
  }

  const real sound::getVolume( void ) const {
    return volume;
  }

  void sound::setLooping( const bool newLooping ) {
    looping = newLooping;

    if ( looping ) {
      alSourcei( source, AL_LOOPING, AL_TRUE );
    } else {
      alSourcei( source, AL_LOOPING, AL_FALSE );
    }

    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not set looping for source",
      "sound::setLooping" );
    }
  }
  
  const bool sound::getLooping( void ) const {
    return looping;
  }

  void sound::setPosition( const vector3 &newPosition ) {  
    alSource3f( source, AL_POSITION,
    newPosition.x,
    newPosition.y,
    newPosition.z );
   
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not set position for source",
      "sound::setPosition" );
    }
  }

  void sound::play( void ) {
    alSourcePlay( source );

    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not play sound source",
      "sound::play" );
    }
  }

  void sound::stop( void ) {
    alSourceStop( source );

    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not stop sound source",
      "sound::stop" );
    }
  }

  const bool sound::isPlaying( void ) const {
    ALenum state;
    alGetSourcei( source, AL_SOURCE_STATE, &state );
  
    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not retrieve source state",
      "sound::isPlaying" );
    }

    return ( state == AL_PLAYING );
  }

  void sound::setup( resource *parent ) {
    soundResource *sp = ( soundResource* )parent;

    setPosition( vector3::ZERO );
    setVolume( sp->getVolume( ) );
    setLooping( sp->getLooping( ) );
    
    alSourcef( source, AL_MAX_DISTANCE, ( ALfloat )sp->getAttenuationMax( ) );
    alSourcei( source, AL_BUFFER, sp->getBuffer( ) );

    if ( alGetError( ) != AL_NO_ERROR ) {
      oasisError( exception::ET_INTERNAL_ERROR,
      "Could not setup sound source for use",
      "sound::setup" );
    }
  }

  void sound::clear( void ) {
    stop( );
  }
}