AudioManager.hxx

Go to the documentation of this file.

/*
 * 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 __AudioManager___
#define __AudioManager___

#include <vector>
#include <string>
#include "Err.hxx"


namespace CLAM{

class AudioDevice;
class AudioDeviceList;
class AudioIn;
class AudioOut;

class AudioManager
{
        friend class AudioIn;
        friend class AudioOut;
        friend class AudioDeviceList;
private:
        int mSampleRate, mLatency;
        unsigned mInternalBuffersNumber;

        std::vector<AudioDevice*> mDevices;

        static std::vector<AudioDeviceList*>& DeviceLists(void);
        
        static AudioManager* _Current(bool set = 0,AudioManager* m = 0)
        {
                static AudioManager* sCurrent = 0;
                if (set)
                {
                        if (m)
                        {
                                if (sCurrent) throw Err("Can only have one AudioManager at a time");
                        }
                        sCurrent = m;
                }
                return sCurrent;
        }
public:
        typedef std::vector<AudioDevice*>::const_iterator device_iterator;
        typedef std::vector<AudioDeviceList*>::const_iterator list_iterator;

        AudioManager(int sampleRate,int latency);

        ~AudioManager();

        static AudioManager& Current()
        {
                AudioManager* p = _Current();
                
                if (p==0) throw Err("No AudioManager current");
                
                return *p;
        }

        AudioDevice* FindDevice(const std::string& name);

        AudioDevice* FindOrCreateDevice(const std::string& name);

        void Start(void) throw(Err);

        int SampleRate(void) { return mSampleRate; }

        int Latency(void) { return mLatency; }

        void SetLatency(int latency) { mLatency = latency; }


        AudioDeviceList* FindList(const std::string& arch = "default");

        list_iterator lists_begin() const {return DeviceLists().begin();}

        list_iterator lists_end() const {return DeviceLists().end();}

        device_iterator used_devices_begin() const {return mDevices.begin();}
        device_iterator used_devices_end() const {return mDevices.end();}

protected:
        bool Register(AudioIn& in);
        bool Register(AudioOut& out);
};

};//CLAM

#endif