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 // License:    wxWindows license
   8 // --------------------------------------------------------------------------
   9 #ifndef _WX_SNDG72X_H
  10 #define _WX_SNDG72X_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 #include "wx/mmedia/sndbase.h"
  17
  18 typedef enum {
  19   wxSOUND_G721,
  20   wxSOUND_G723_24,
  21   wxSOUND_G723_40
  22 } wxSoundG72XType;
  23
  24 // This fixes a bug in Mingw95
  25 typedef struct g72x_state g72state;
  26
  27 //
  28 // G72X format
  29 //
  30 class WXDLLIMPEXP_MMEDIA wxSoundFormatG72X: public wxSoundFormatBase {
  31  public:
  32   wxSoundFormatG72X();
  33   ~wxSoundFormatG72X();
  34
  35   void SetG72XType(wxSoundG72XType type);
  36   wxSoundG72XType GetG72XType() const { return m_g72x_type; }
  37
  38   void SetSampleRate(wxUint32 srate);
  39   wxUint32 GetSampleRate() const;
  40
  41   wxSoundFormatType GetType() const { return wxSOUND_G72X; }
  42   wxSoundFormatBase *Clone() const;
  43
  44   wxUint32 GetTimeFromBytes(wxUint32 bytes) const;
  45   wxUint32 GetBytesFromTime(wxUint32 time) const;
  46
  47   bool operator !=(const wxSoundFormatBase& frmt2) const;
  48
  49  protected:
  50   wxUint32 m_srate;
  51   wxSoundG72XType m_g72x_type;
  52 };
  53
  54 //
  55 // ULAW converter class
  56 //
  57
  58 class WXDLLIMPEXP_MMEDIA wxSoundRouterStream;
  59 class WXDLLIMPEXP_MMEDIA wxSoundStreamG72X: public wxSoundStreamCodec {
  60  public:
  61   wxSoundStreamG72X(wxSoundStream& sndio);
  62   ~wxSoundStreamG72X();
  63
  64   wxSoundStream& Read(void *buffer, wxUint32 len);
  65   wxSoundStream& Write(const void *buffer, wxUint32 len);
  66
  67   bool SetSoundFormat(const wxSoundFormatBase& format);
  68
  69  protected:
  70   wxSoundRouterStream *m_router;
  71   wxUint8 m_n_bits, m_current_mask, m_current_b_pos, m_current_byte;
  72   wxUint8 *m_io_buffer;
  73   g72state *m_state;
  74
  75   int (*m_coder)(int code, int in_code, struct g72x_state *state);
  76   int (*m_decoder)(int code, int out_code, struct g72x_state *state);
  77
  78  protected:
  79   void PutBits(wxUint8 bits);
  80   wxUint8 GetBits();
  81 };
  82
  83 #endif