AudioCodecs_Stream.hxx

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/*
 * Copyright (c) 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 __AUDIOCODECS_STREAM__
#define __AUDIOCODECS_STREAM__

#include "DataTypes.hxx"
#include "DataTypes.hxx"
#include <vector>

namespace CLAM
{

        class AudioFile;

namespace AudioCodecs
{
        class Stream
        {
        public:
                Stream();
                virtual ~Stream();
                virtual void PrepareReading()   = 0;
                virtual void PrepareWriting()   = 0;
                virtual void Dispose()          = 0;
                virtual void SeekTo(unsigned long framePosition) {}
                virtual unsigned long GetFramePosition() const {return mFramePosition;}
        protected:
                virtual void DiskToMemoryTransfer() = 0;
                virtual void MemoryToDiskTransfer() = 0;

        public:
                bool ReadData( int channel, TData* buffer, unsigned nFrames );
                bool ReadData( TData** buffers, unsigned nFrames );
                bool ReadData( int* channels, int nchannels,
                               TData** buffers, unsigned nFrames );

                void WriteData( int channel, const TData* buffer, unsigned nFrames );
                void WriteData( TData** const buffers, unsigned nFrames );
                void WriteData( int* channels, int nchannels,
                                TData** const buffers, unsigned nFrames );

        protected:
                void SetChannels( unsigned nChannels );

        protected:
                unsigned            mChannels;
                std::vector<TData>  mInterleavedData;
                bool                mEOFReached;
                unsigned            mFramesLastRead;
                unsigned long       mFramePosition;

        private:
                void AdjustInterleavedBuffer( unsigned nFrames );
        };
}

}

#endif // AudioCodecs_Stream.hxx