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/sndbase.h"
  17 #include "wx/mmedia/sndcodec.h"
  18 #include "wx/mmedia/sndbase.h"
  19
  20 typedef enum {
  21   wxSOUND_G721,
  22   wxSOUND_G723_24,
  23   wxSOUND_G723_40
  24 } wxSoundG72XType;
  25
  26 // This fixes a bug in Mingw95
  27 typedef struct g72x_state g72state;
  28
  29 //
  30 // G72X format
  31 //
  32 class WXDLLEXPORT wxSoundFormatG72X: public wxSoundFormatBase {
  33  public:
  34   wxSoundFormatG72X();
  35   ~wxSoundFormatG72X();
  36
  37   void SetG72XType(wxSoundG72XType type);
  38   wxSoundG72XType GetG72XType() const { return m_g72x_type; }
  39
  40   void SetSampleRate(wxUint32 srate);
  41   wxUint32 GetSampleRate() const;
  42
  43   wxSoundFormatType GetType() const { return wxSOUND_G72X; }
  44   wxSoundFormatBase *Clone() const;
  45
  46   wxUint32 GetTimeFromBytes(wxUint32 bytes) const;
  47   wxUint32 GetBytesFromTime(wxUint32 time) const;
  48
  49   bool operator !=(const wxSoundFormatBase& frmt2) const;
  50
  51  protected:
  52   wxUint32 m_srate;
  53   wxSoundG72XType m_g72x_type;
  54 };
  55
  56 //
  57 // ULAW converter class
  58 //
  59
  60 class WXDLLEXPORT wxSoundRouterStream;
  61 class WXDLLEXPORT wxSoundStreamG72X: public wxSoundStreamCodec {
  62  public:
  63   wxSoundStreamG72X(wxSoundStream& sndio);
  64   ~wxSoundStreamG72X();
  65
  66   wxSoundStream& Read(void *buffer, wxUint32 len);
  67   wxSoundStream& Write(const void *buffer, wxUint32 len);
  68
  69   bool SetSoundFormat(const wxSoundFormatBase& format);
  70
  71  protected:
  72   wxSoundRouterStream *m_router;
  73   wxUint8 m_n_bits, m_current_mask, m_current_b_pos, m_current_byte;
  74   wxUint8 *m_io_buffer;
  75   g72state *m_state;
  76
  77   int (*m_coder)(int code, int in_code, struct g72x_state *state);
  78   int (*m_decoder)(int code, int out_code, struct g72x_state *state);
  79
  80  protected:
  81   void PutBits(wxUint8 bits);
  82   wxUint8 GetBits();
  83 };
  84
  85 #endif