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 // License:    wxWindows license
   8 // --------------------------------------------------------------------------
   9 #ifndef _WX_SNDCPCM_H
  10 #define _WX_SNDCPCM_H
  11
  12 #ifdef __GNUG__
  13 #pragma interface "sndcpcm.h"
  14 #endif
  15
  16 #include "wx/defs.h"
  17 #include "wx/mmedia/defs.h"
  18 #include "wx/mmedia/sndbase.h"
  19 #include "wx/mmedia/sndcodec.h"
  20
  21 //
  22 // PCM converter class
  23 //
  24
  25 class WXDLLIMPEXP_MMEDIA wxSoundStreamPcm: public wxSoundStreamCodec {
  26 public:
  27     typedef void (*ConverterType)(const void *buf_in, void *buf_out,
  28                                   wxUint32 len);
  29
  30     wxSoundStreamPcm(wxSoundStream& sndio);
  31     ~wxSoundStreamPcm();
  32
  33     wxSoundStream& Read(void *buffer, wxUint32 len);
  34     wxSoundStream& Write(const void *buffer, wxUint32 len);
  35
  36     bool SetSoundFormat(const wxSoundFormatBase& format);
  37
  38     wxUint32 GetBestSize() const;
  39
  40 protected:
  41     wxUint32 GetReadSize(wxUint32 len) const;
  42     wxUint32 GetWriteSize(wxUint32 len) const;
  43
  44 protected:
  45     ConverterType m_function_out, m_function_in;
  46
  47     // Static temporary buffer
  48     char *m_prebuffer;
  49     wxUint32 m_prebuffer_size;
  50     // Estimated best size to fit into the static buffer
  51     wxUint32 m_best_size;
  52     // Multiplier for IO buffer size
  53     float m_multiplier_in, m_multiplier_out;
  54 };
  55
  56 #endif