utils/wxMMedia/mmriff.h

   1 // /////////////////////////////////////////////////////////////////////////////
   2 // Name:       mmriff.h
   3 // Purpose:    wxMMedia
   4 // Author:     Guilhem Lavaux
   5 // Created:    1998
   6 // Updated:
   7 // Copyright:  (C) 1998, Guilhem Lavaux
   8 // License:    wxWindows license
   9 // /////////////////////////////////////////////////////////////////////////////
  10 /* Real -*- C++ -*- */
  11 #ifndef __MM_riff_H__
  12 #define __MM_riff_H__
  13 #ifdef __GNUG__
  14 #pragma interface
  15 #endif
  16
  17 #include "mmtype.h"
  18 #include "mmfile.h"
  19
  20 #define RIFF_READ 0
  21 #define RIFF_WRITE 1
  22 #define INVALID_CHUNK_LEN ((wxUint32)-1)
  23
  24 ///
  25 class wxRiffCodec {
  26 public:
  27   ///
  28   wxRiffCodec();
  29   ///
  30   wxRiffCodec(wxOutputStream& s);
  31   ///
  32   wxRiffCodec(wxInputStream& s);
  33   ///
  34   virtual ~wxRiffCodec();
  35
  36   ///
  37   void SetFile(wxInputStream& s) { cout << "RIFF:SetFile(i)" << endl; riff_i_stream = &s; riff_o_stream = NULL; }
  38   ///
  39   void SetFile(wxOutputStream& s) { cout << "RIFF::SetFile(o)" << endl; riff_i_stream = NULL; riff_o_stream = &s; }
  40
  41   ///
  42   bool Read32(wxUint32& i32);
  43   ///
  44   bool Read16(wxUint16& i16);
  45   ///
  46   bool ReadData(void *data, wxUint32 size);
  47   ///
  48   bool Skip(wxUint32 skip);
  49
  50   ///
  51   bool Write32(wxUint32 i32);
  52   ///
  53   bool Write16(wxUint16 i16);
  54   ///
  55   bool WriteData(void *data, wxUint32 size);
  56
  57   ///
  58   inline wxUint32 GetChunkLength() const { return chunk_length; }
  59   ///
  60   inline const wxString& GetChunkName() const { return m_chunk; }
  61
  62   ///
  63   bool RiffReset(wxUint8 state);
  64
  65   ///
  66   bool FindChunk(const wxString& name = "", bool from_here = FALSE);
  67   ///
  68   bool CreateChunk(const wxString& name, wxUint32 chunk_size);
  69
  70   ///
  71   inline wxMMFileError GetError() const { return riff_error; }
  72
  73 protected:
  74   wxInputStream *riff_i_stream;
  75   wxOutputStream *riff_o_stream;
  76   wxUint32 chunk_length;
  77   wxMMFileError riff_error;
  78   wxString m_chunk;
  79 };
  80
  81 #endif