base/applications/sndrec32/audio_format.hpp

   1 /* PROJECT:         ReactOS sndrec32
   2  * LICENSE:         GPL - See COPYING in the top level directory
   3  * FILE:            base/applications/sndrec32/audio_format.hpp
   4  * PURPOSE:         Audio format abstraction
   5  * PROGRAMMERS:     Marco Pagliaricci (irc: rendar)
   6  */
   7
   8 #ifndef _AUDIOFORMAT__H_
   9 #define _AUDIOFORMAT__H_
  10
  11 #include "audio_def.hpp"
  12
  13 _AUDIO_NAMESPACE_START_
  14
  15 class audio_format
  16 {
  17     protected:
  18         unsigned int samples_psec;
  19         unsigned short int bits_psample;
  20         unsigned short int chan;
  21     public:
  22         /* Ctors */
  23         audio_format(unsigned int samples_per_second,
  24                      unsigned short int bits_per_sample,
  25                      unsigned short int channels) : samples_psec(samples_per_second),
  26                                                     bits_psample(bits_per_sample),
  27                                                     chan(channels)
  28         {
  29         }
  30
  31         /* Dtor */
  32         virtual ~audio_format(void)
  33         {
  34         }
  35
  36         /* Operators */
  37         bool operator==(audio_format & eq) const
  38         {
  39             /* The same audio format is when samples per second,
  40                bit per sample, and channels mono/stereo are equal */
  41             return ((samples_psec == eq.samples_psec) &&
  42                     (bits_psample == eq.bits_psample) &&
  43                     (chan == eq.chan));
  44         }
  45
  46         /* Public Functions */
  47
  48         unsigned int sample_rate(void) const
  49         {
  50             return samples_psec;
  51         }
  52
  53         unsigned short int bits(void) const
  54         {
  55             return bits_psample;
  56         }
  57
  58         unsigned short int channels(void) const
  59         {
  60             return chan;
  61         }
  62
  63         unsigned int byte_rate(void) const
  64         {
  65             return (samples_psec * chan * (bits_psample / 8));
  66         }
  67
  68         unsigned int block_align(void) const
  69         {
  70             return (chan * (bits_psample / 8));
  71         }
  72
  73         unsigned int samples_in_seconds(float seconds) const
  74         {
  75             return (unsigned int)(((float)samples_psec * (float) chan) * seconds);
  76         }
  77
  78         unsigned int samples_in_bytes(unsigned int bytes) const
  79         {
  80             return (bytes / ((bits_psample / 8) * chan));
  81         }
  82
  83         unsigned int bytes_in_samples(unsigned int samples) const
  84         {
  85             return (samples * ((bits_psample / 8) * chan));
  86         }
  87 };
  88
  89 extern audio_format UNKNOWN_FORMAT;
  90 extern audio_format A44100_16BIT_STEREO;
  91 extern audio_format A44100_16BIT_MONO;
  92
  93 _AUDIO_NAMESPACE_END_
  94
  95 #endif /* _AUDIOFORMAT__H_ */