contrib/include/wx/mmedia/sndcpcm.h

   1 // --------------------------------------------------------------------------
   2 // Name: sndcpcm.h
   3 // Purpose:
   4 // Date: 08/11/1999
   5 // Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
   6 // CVSID: $Id$
   7 // --------------------------------------------------------------------------
   8 #ifndef _WX_SNDCPCM_H
   9 #define _WX_SNDCPCM_H
  10
  11 #ifdef __GNUG__
  12 #pragma interface "sndcpcm.h"
  13 #endif
  14
  15 #include "wx/defs.h"
  16 #include "wx/mmedia/sndbase.h"
  17 #include "wx/mmedia/sndcodec.h"
  18
  19 //
  20 // PCM converter class
  21 //
  22
  23 class wxSoundStreamPcm: public wxSoundStreamCodec {
  24 public:
  25     typedef void (*ConverterType)(const void *buf_in, void *buf_out,
  26                                   wxUint32 len);
  27
  28     wxSoundStreamPcm(wxSoundStream& sndio);
  29     ~wxSoundStreamPcm();
  30
  31     wxSoundStream& Read(void *buffer, wxUint32 len);
  32     wxSoundStream& Write(const void *buffer, wxUint32 len);
  33
  34     bool SetSoundFormat(const wxSoundFormatBase& format);
  35
  36     wxUint32 GetBestSize() const;
  37
  38 protected:
  39     wxUint32 GetReadSize(wxUint32 len) const;
  40     wxUint32 GetWriteSize(wxUint32 len) const;
  41
  42 protected:
  43     ConverterType m_function_out, m_function_in;
  44
  45     // Static temporary buffer
  46     char *m_prebuffer;
  47     wxUint32 m_prebuffer_size;
  48     // Estimated best size to fit into the static buffer
  49     wxUint32 m_best_size;
  50     // Multiplier for IO buffer size
  51     float m_multiplier_in, m_multiplier_out;
  52 };
  53
  54 #endif