utils/wxMMedia2/lib/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 <stddef.h>
  16 #include "sndcodec.h"
  17
  18 //
  19 // PCM converter class
  20 //
  21
  22 class wxSoundStreamPcm: public wxSoundStreamCodec {
  23 public:
  24     typedef void (*ConverterType)(const void *buf_in, void *buf_out,
  25                                   wxUint32 len);
  26
  27     wxSoundStreamPcm(wxSoundStream& sndio);
  28     ~wxSoundStreamPcm();
  29
  30     wxSoundStream& Read(void *buffer, wxUint32 len);
  31     wxSoundStream& Write(const void *buffer, wxUint32 len);
  32
  33     bool SetSoundFormat(const wxSoundFormatBase& format);
  34
  35     wxUint32 GetBestSize() const;
  36
  37 protected:
  38     wxUint32 GetReadSize(wxUint32 len) const;
  39     wxUint32 GetWriteSize(wxUint32 len) const;
  40
  41 protected:
  42     ConverterType m_function_out, m_function_in;
  43
  44     // Static temporary buffer
  45     char *m_prebuffer;
  46     wxUint32 m_prebuffer_size;
  47     // Estimated best size to fit into the static buffer
  48     wxUint32 m_best_size;
  49     // Multiplier for IO buffer size
  50     float m_multiplier_in, m_multiplier_out;
  51 };
  52
  53 #endif