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 #ifdef __GNUG__
  13 #pragma interface "sndg72x.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 #include "wx/mmedia/sndbase.h"
  21
  22 typedef enum {
  23   wxSOUND_G721,
  24   wxSOUND_G723_24,
  25   wxSOUND_G723_40
  26 } wxSoundG72XType;
  27
  28 // This fixes a bug in Mingw95
  29 typedef struct g72x_state g72state;
  30
  31 //
  32 // G72X format
  33 //
  34 class WXDLLIMPEXP_MMEDIA wxSoundFormatG72X: public wxSoundFormatBase {
  35  public:
  36   wxSoundFormatG72X();
  37   ~wxSoundFormatG72X();
  38
  39   void SetG72XType(wxSoundG72XType type);
  40   wxSoundG72XType GetG72XType() const { return m_g72x_type; }
  41
  42   void SetSampleRate(wxUint32 srate);
  43   wxUint32 GetSampleRate() const;
  44
  45   wxSoundFormatType GetType() const { return wxSOUND_G72X; }
  46   wxSoundFormatBase *Clone() const;
  47
  48   wxUint32 GetTimeFromBytes(wxUint32 bytes) const;
  49   wxUint32 GetBytesFromTime(wxUint32 time) const;
  50
  51   bool operator !=(const wxSoundFormatBase& frmt2) const;
  52
  53  protected:
  54   wxUint32 m_srate;
  55   wxSoundG72XType m_g72x_type;
  56 };
  57
  58 //
  59 // ULAW converter class
  60 //
  61
  62 class WXDLLIMPEXP_MMEDIA wxSoundRouterStream;
  63 class WXDLLIMPEXP_MMEDIA wxSoundStreamG72X: public wxSoundStreamCodec {
  64  public:
  65   wxSoundStreamG72X(wxSoundStream& sndio);
  66   ~wxSoundStreamG72X();
  67
  68   wxSoundStream& Read(void *buffer, wxUint32 len);
  69   wxSoundStream& Write(const void *buffer, wxUint32 len);
  70
  71   bool SetSoundFormat(const wxSoundFormatBase& format);
  72
  73  protected:
  74   wxSoundRouterStream *m_router;
  75   wxUint8 m_n_bits, m_current_mask, m_current_b_pos, m_current_byte;
  76   wxUint8 *m_io_buffer;
  77   g72state *m_state;
  78
  79   int (*m_coder)(int code, int in_code, struct g72x_state *state);
  80   int (*m_decoder)(int code, int out_code, struct g72x_state *state);
  81
  82  protected:
  83   void PutBits(wxUint8 bits);
  84   wxUint8 GetBits();
  85 };
  86
  87 #endif