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