libreoffice/slideshow/source/engine/soundplayer.cxx

/*************************************************************************
 *
 *  $RCSfile: soundplayer.cxx,v $
 *
 *  $Revision: 1.3 $
 *
 *  last change: $Author: vg $ $Date: 2005-03-10 13:45:15 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  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
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
 *  License at http://www.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
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 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/

#include <canvas/debug.hxx>
#include <canvas/verbosetrace.hxx>
#include <soundplayer.hxx>

#ifndef _COM_SUN_STAR_LANG_XMULTICOMPONENTFACTORY_HPP_
#include <com/sun/star/lang/XMultiComponentFactory.hpp>
#endif
#ifndef _COM_SUN_STAR_LANG_NOSUPPORTEXCEPTION_HPP_
#include <com/sun/star/lang/NoSupportException.hpp>
#endif
#ifndef _COM_SUN_STAR_LANG_XCOMPONENT_HDL_
#include <com/sun/star/lang/XComponent.hdl>
#endif

#include <tools/urlobj.hxx>

#include <algorithm>

using namespace ::com::sun::star;


// TODO(Q3): This breaks encapsulation. Either export
// these strings from avmedia, or provide an XManager
// factory there
#ifdef WNT
#   define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.media.Manager_DirectX"
#else
#   define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.media.Manager_Java"
#endif


namespace presentation
{
    namespace internal
    {
        // TODO(Q3): Move the whole SoundPlayer class to avmedia.

        boost::shared_ptr<SoundPlayer> SoundPlayer::create(
            EventMultiplexer & rEventMultiplexer,
            const ::rtl::OUString& rSoundURL,
            const uno::Reference< uno::XComponentContext>&  rComponentContext )
        {
            boost::shared_ptr<SoundPlayer> pPlayer(
                new SoundPlayer( rEventMultiplexer,
                                 rSoundURL,
                                 rComponentContext ) );
            rEventMultiplexer.addPauseHandler( pPlayer );
            pPlayer->mThis = pPlayer;
            return pPlayer;
        }

        bool SoundPlayer::handlePause( bool bPauseShow )
        {
            return bPauseShow ? stopPlayback() : startPlayback();
        }

        void SoundPlayer::dispose()
        {
            if (mThis.get() != 0) {
                mrEventMultiplexer.removePauseHandler( mThis );
                mThis.reset();
            }

            if (mxPlayer.is()) {
                mxPlayer->stop();
                uno::Reference<lang::XComponent> xComponent(
                    mxPlayer, uno::UNO_QUERY );
                if (xComponent.is())
                    xComponent->dispose();
                mxPlayer.clear();
            }
        }

        SoundPlayer::SoundPlayer(
            EventMultiplexer & rEventMultiplexer,
            const ::rtl::OUString& rSoundURL,
            const uno::Reference< uno::XComponentContext>&  rComponentContext )
            : mrEventMultiplexer(rEventMultiplexer),
              mThis(),
              mxPlayer()
        {
            ENSURE_AND_THROW( rComponentContext.is(),
                              "SoundPlayer::SoundPlayer(): Invalid component context" );

            try
            {
                uno::Reference<lang::XMultiComponentFactory> xFac(
                    rComponentContext->getServiceManager() );

                uno::Reference< ::com::sun::star::media::XManager > xManager(
                    xFac->createInstanceWithContext(
                        ::rtl::OUString::createFromAscii( AVMEDIA_MANAGER_SERVICE_NAME ),
                        rComponentContext ),
                    uno::UNO_QUERY_THROW );

                const INetURLObject aURL( rSoundURL );
                mxPlayer.set( xManager->createPlayer(
                                aURL.GetMainURL( INetURLObject::DECODE_UNAMBIGUOUS ) ),
                                uno::UNO_QUERY_THROW );
            }
            catch( uno::Exception& )
            {
                throw lang::NoSupportException(
                    rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                       "No sound support for ") ) + rSoundURL,
                    uno::Reference<uno::XInterface>() );
            }
        }

        SoundPlayer::~SoundPlayer()
        {
            dispose();
        }

        double SoundPlayer::getDuration() const
        {
            if( !mxPlayer.is() )
                return 0.0;

            const double nDuration( mxPlayer->getDuration() );
            if( mxPlayer->isPlaying() )
                return ::std::max( 0.0,
                                   nDuration - mxPlayer->getMediaTime() );
            else
                return nDuration;
        }

        bool SoundPlayer::startPlayback()
        {
            if( !mxPlayer.is() )
                return false;

            if( mxPlayer->isPlaying() )
                mxPlayer->stop();

            mxPlayer->start();
            return true;
        }

        bool SoundPlayer::stopPlayback()
        {
            if( mxPlayer.is() )
                mxPlayer->stop();

            return true;
        }

    }
}