contrib/include/wx/mmedia/sndg72x.h

   1 // --------------------------------------------------------------------------
   2 // Name: sndg72x.h
   3 // Purpose:
   4 // Date: 08/26/1999
   5 // Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
   6 // CVSID: $Id$
   7 // --------------------------------------------------------------------------
   8 #ifndef _WX_SNDG72X_H
   9 #define _WX_SNDG72X_H
  10
  11 #ifdef __GNUG__
  12 #pragma interface "sndg72x.h"
  13 #endif
  14
  15 #include "wx/defs.h"
  16 #include "wx/mmedia/defs.h"
  17 #include "wx/mmedia/sndbase.h"
  18 #include "wx/mmedia/sndcodec.h"
  19 #include "wx/mmedia/sndbase.h"
  20
  21 typedef enum {
  22   wxSOUND_G721,
  23   wxSOUND_G723_24,
  24   wxSOUND_G723_40
  25 } wxSoundG72XType;
  26
  27 // This fixes a bug in Mingw95
  28 typedef struct g72x_state g72state;
  29
  30 //
  31 // G72X format
  32 //
  33 class WXDLLIMPEXP_MMEDIA wxSoundFormatG72X: public wxSoundFormatBase {
  34  public:
  35   wxSoundFormatG72X();
  36   ~wxSoundFormatG72X();
  37
  38   void SetG72XType(wxSoundG72XType type);
  39   wxSoundG72XType GetG72XType() const { return m_g72x_type; }
  40
  41   void SetSampleRate(wxUint32 srate);
  42   wxUint32 GetSampleRate() const;
  43
  44   wxSoundFormatType GetType() const { return wxSOUND_G72X; }
  45   wxSoundFormatBase *Clone() const;
  46
  47   wxUint32 GetTimeFromBytes(wxUint32 bytes) const;
  48   wxUint32 GetBytesFromTime(wxUint32 time) const;
  49
  50   bool operator !=(const wxSoundFormatBase& frmt2) const;
  51
  52  protected:
  53   wxUint32 m_srate;
  54   wxSoundG72XType m_g72x_type;
  55 };
  56
  57 //
  58 // ULAW converter class
  59 //
  60
  61 class WXDLLIMPEXP_MMEDIA wxSoundRouterStream;
  62 class WXDLLIMPEXP_MMEDIA wxSoundStreamG72X: public wxSoundStreamCodec {
  63  public:
  64   wxSoundStreamG72X(wxSoundStream& sndio);
  65   ~wxSoundStreamG72X();
  66
  67   wxSoundStream& Read(void *buffer, wxUint32 len);
  68   wxSoundStream& Write(const void *buffer, wxUint32 len);
  69
  70   bool SetSoundFormat(const wxSoundFormatBase& format);
  71
  72  protected:
  73   wxSoundRouterStream *m_router;
  74   wxUint8 m_n_bits, m_current_mask, m_current_b_pos, m_current_byte;
  75   wxUint8 *m_io_buffer;
  76   g72state *m_state;
  77
  78   int (*m_coder)(int code, int in_code, struct g72x_state *state);
  79   int (*m_decoder)(int code, int out_code, struct g72x_state *state);
  80
  81  protected:
  82   void PutBits(wxUint8 bits);
  83   wxUint8 GetBits();
  84 };
  85
  86 #endif