AudioDevice.hxx

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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
 *
 */
#ifndef __AudioDevice__
#define __AudioDevice__

#include "AudioManager.hxx"
#include "Audio.hxx"

namespace CLAM{



class AudioDevice
{
        friend class AudioIn;
        friend class AudioOut;
        friend class AudioManager;
public:
        struct TInfo
        {
                std::string mName;
                std::string mArch;
                int mNReadChannels;
                int mNWriteChannels;
                int mNChannels;
                int mSampleRate;
                unsigned int mNotifySize;

                TInfo() { Reset();}

                void Reset()
                {
                        mName=mArch="";
                        mNChannels=mNReadChannels=mNWriteChannels=mSampleRate=mNotifySize=0;
                }
        };
        
        std::vector<AudioIn*> mInputs;
        std::vector<AudioOut*> mOutputs;
        
        std::string mName;
        bool mForceNChannels;
        int mNChannels;
        int mNReadChannels;
        int mNWriteChannels;
        
        AudioDevice(const std::string& name)
        {
                mName = name;
                mNChannels = mNReadChannels = mNWriteChannels = 0;
                mForceNChannels=false;
                mAudioManager=0;
        }
        
        virtual ~AudioDevice() { };
        
        virtual void Start(void) throw(Err) = 0;
        virtual void Stop(void) throw(Err) = 0;
        virtual void Read(Audio& audio,const int channelID) = 0;

        virtual void Write(const Audio& audio,const int channelID) = 0;
        
        virtual void GetInfo(TInfo&);

        virtual void SetNChannels(int channels);
        
protected:
        
        bool Register(AudioManager* am,AudioIn& in);
        bool Register(AudioManager* am,AudioOut& out);
        void Unregister(AudioIn& in);
        void Unregister(AudioOut& out);
        
        int SampleRate(void);
        int Latency(void);
        void SetLatency(int latency);

private:
        AudioManager* mAudioManager;
        AudioManager& _AudioManager(void);
        void _SetAudioManager(AudioManager* am);
};

};//CLAM

#endif