reactos/base/applications/sndrec32/audio_format.hpp

/* PROJECT:         ReactOS sndrec32
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            base/applications/sndrec32/audio_format.hpp
 * PURPOSE:         Audio format abstraction
 * PROGRAMMERS:     Marco Pagliaricci (irc: rendar)
 */



#ifndef _AUDIOFORMAT__H_
#define _AUDIOFORMAT__H_



#include "audio_def.hpp"




_AUDIO_NAMESPACE_START_







class audio_format
{
    protected:
    

        unsigned int samples_psec;
        unsigned short int bits_psample;
        unsigned short int chan;


    public:
        
        
        //
        // Ctors
        //

        audio_format( unsigned int samples_per_second, 
            unsigned short int bits_per_sample, unsigned short int channels )

            : samples_psec( samples_per_second ), bits_psample( bits_per_sample ),
            chan( channels )

        {     }







        //
        // Dtor
        //

        virtual ~audio_format( void )
        { }







        //
        // Operators
        //

        bool operator==( audio_format & eq ) const
        {
            //
            // The same audio format is when samples per second,
            // bit per sample, and channels mono/stereo are equal.
            //

            return (( samples_psec == eq.samples_psec ) 
                && ( bits_psample == eq.bits_psample ) && ( chan == eq.chan ));
        }








        //
        // Public Functions
        //

        unsigned int sample_rate( void ) const
        { return samples_psec; }


        unsigned short int bits( void ) const
        { return bits_psample; }


        unsigned short int channels( void ) const
        { return chan; }


        unsigned int byte_rate( void ) const
        { return ( samples_psec * chan * ( bits_psample / 8 )); }


        unsigned int block_align( void ) const
        { return ( chan * ( bits_psample / 8 )); }



        unsigned int samples_in_seconds( float seconds ) const
        {

            return ( unsigned int )
                ((( float )samples_psec * ( float ) chan ) * seconds );

        }

        unsigned int samples_in_bytes ( unsigned int bytes ) const
        {

            return ( bytes / (( bits_psample / 8 ) * chan ));

        }

        unsigned int bytes_in_samples( unsigned int samples ) const
        {

            return ( samples * (( bits_psample / 8 ) * chan ));

        }

};




extern audio_format UNKNOWN_FORMAT;
extern audio_format A44100_16BIT_STEREO;
extern audio_format A44100_16BIT_MONO;






_AUDIO_NAMESPACE_END_







#endif //ifdef _AUDIOFORMAT__H_