AudioOut.cxx

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/*
 * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "AudioOut.hxx"
#include "AudioManager.hxx"
#include "ProcessingFactory.hxx"



namespace CLAM
{

namespace Hidden
{
        static const char * metadata[] = {
                "key", "AudioOut",
//              "category", "Audio I/O",
//              "description", "AudioOut",
                0
        };
        static FactoryRegistrator<ProcessingFactory, AudioOut> reg = metadata;
}
        
AudioOut::AudioOut() 
        : mInput( "Audio Input", this )
{ 
        mpDevice = 0; 
        Configure(AudioIOConfig()); 
}

AudioOut::AudioOut(const AudioIOConfig &c)
        : mInput( "Audio Input", this )
{ 
        mpDevice = 0; 
        Configure(c); 
}

AudioOut::~AudioOut()
{ 
        try {
                if (mpDevice) 
                        mpDevice->Unregister(*this); 
        }
        catch (Err &e) {
                std::cerr << "AudioOut::~AudioOut: unregistering processing: " << e.what() << std::endl; 
        }
}

bool AudioOut::ConcreteConfigure(const ProcessingConfig& c)
        throw(ErrProcessingObj)
{
        CopyAsConcreteConfig(mConfig, c);

        if (mpDevice)
                mpDevice->Unregister(*this);

        AudioManager *m;

        try {
                m = &(AudioManager::Current());
        }
        catch (Err &e) {
                ErrProcessingObj ne("AudioOut::ConcreteConfigure(): No AudioManager found.",this);
                ne.Embed(e);
                throw(ne);
        }

        bool res;
        try {
                res = m->Register(*this);
        }
        catch (Err &e) {
                AddConfigErrorMessage( e.what() );
                res = false;
        }

        if (res == false)
                AddConfigErrorMessage( "AudioOut::ConcreteConfigure(): "
                       "Failed to register in AudioManager.") ;

        mInput.SetSize(mConfig.GetFrameSize());
        return res;
}

bool AudioOut::ConcreteStart(void) 
{
        if (!mpDevice)
                throw Err("AudioOut::ConcreteStart(): No Device found!");
        try
        {
                mpDevice->Start();
        }
        catch (Err &e) {
                std::cerr << " AudioOut::ConcreteStart(): could not start audio device: maybe another program is blocking it" << std::endl;
                std::cerr << " Received error message: <"<<e.what() << std::endl;
        }
        return true;
}

bool AudioOut::ConcreteStop()
{
        mpDevice->Stop();
        return true;
}

void AudioOut::GetDeviceInfo(AudioDevice::TInfo &info) const
{
        if (mpDevice)
                mpDevice->GetInfo(info);
        else
                info.Reset();
}

bool AudioOut::Do()
{
        bool res = Do(mInput.GetAudio());
        mInput.Consume();;
        return res;
}

}