utils/wxMMedia/mmfile.cpp

   1 ////////////////////////////////////////////////////////////////////////////////
   2 // Name:       mmfile.cpp
   3 // Purpose:    wxMMedia
   4 // Author:     Guilhem Lavaux
   5 // Created:    1997
   6 // Updated:    1998
   7 // Copyright:  (C) 1997, 1998, Guilhem Lavaux
   8 // License:    wxWindows license
   9 ////////////////////////////////////////////////////////////////////////////////
  10 #ifdef __GNUG__
  11 #pragma implementation
  12 #endif
  13 #ifdef WX_PRECOMP
  14 #include "wx_prec.h"
  15 #else
  16 #include "wx/wx.h"
  17 #endif
  18 #include <wx/stream.h>
  19 #include <wx/wfstream.h>
  20 #include <wx/mstream.h>
  21
  22 #include "mmfile.h"
  23
  24 #ifdef __BORLANDC__
  25 #pragma hdrstop
  26 #endif
  27
  28 wxMMediaFile::wxMMediaFile()
  29   : m_istream(NULL), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  30     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  31     m_seekable(FALSE)
  32 {
  33 }
  34
  35 wxMMediaFile::wxMMediaFile(wxOutputStream& os, bool seekable)
  36   : m_istream(NULL), m_i_temp(NULL), m_ostream(&os), m_o_temp(NULL),
  37     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  38     m_seekable(seekable)
  39 {
  40 }
  41
  42 wxMMediaFile::wxMMediaFile(wxInputStream& is, bool preload, bool seekable)
  43   : m_istream(&is), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  44     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  45     m_seekable(seekable)
  46 {
  47 /*
  48   if (preload) {
  49     wxMemoryStream *tmpstream = new wxMemoryStream();
  50
  51     m_o_temp = tmpstream;
  52     m_i_temp = tmpstream;
  53
  54     m_o_temp->Write(is);
  55   }
  56 */
  57 }
  58
  59 wxMMediaFile::wxMMediaFile(const wxString& fname)
  60   : m_istream(NULL), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  61     m_tmpfname((char *)NULL), m_mfname(fname),
  62     m_seekable(TRUE)
  63 {
  64   wxFileStream *s = new wxFileStream(fname);
  65
  66   m_mfname = fname;
  67   m_istream = s;
  68   m_ostream = s;
  69 }
  70
  71 void wxMMediaFile::SetFile(wxInputStream& str, bool preload, bool seekable)
  72 {
  73   CleanUpPrevious();
  74   m_istream = &str;
  75   m_ostream = NULL;
  76   m_seekable = seekable;
  77
  78 /*
  79   if (preload) {
  80     wxMemoryStream *tmpstream = new wxMemoryStream();
  81
  82     m_i_temp = tmpstream;
  83     m_o_temp = tmpstream;
  84
  85     m_o_temp->Write(str);
  86   }
  87 */
  88 }
  89
  90 void wxMMediaFile::SetFile(wxOutputStream& str, bool seekable)
  91 {
  92   CleanUpPrevious();
  93   m_ostream = &str;
  94   m_istream = NULL;
  95   m_seekable = seekable;
  96 }
  97
  98 void wxMMediaFile::SetFile(const wxString& fname)
  99 {
 100   CleanUpPrevious();
 101
 102   m_mfname = fname;
 103   wxFileStream *f = new wxFileStream(fname);
 104
 105   SetFile(*f, FALSE, TRUE);
 106 }
 107
 108 void wxMMediaFile::CleanUpPrevious()
 109 {
 110   if (m_i_temp) {
 111     m_i_temp->SeekI(0);
 112
 113     if (m_ostream)
 114       m_ostream->Write(*m_i_temp);
 115
 116     delete m_i_temp; // Only one delete because m_tmpo* and m_tmpi* are linked
 117
 118     if (m_tmpfname)
 119       wxRemoveFile(m_tmpfname);
 120   }
 121
 122   if (!m_mfname.IsNull() && m_mfname != "")
 123     delete m_istream;
 124
 125   m_i_temp = NULL;
 126   m_o_temp = NULL;
 127   m_istream = NULL;
 128   m_ostream = NULL;
 129 }
 130
 131 wxMMediaFile::~wxMMediaFile()
 132 {
 133   CleanUpPrevious();
 134 }
 135
 136 wxMMtime wxMMediaFile::GetLength()
 137 {
 138   wxMMtime mm_time = {-1, 0, 0};
 139   return mm_time;
 140 }
 141
 142 wxMMtime wxMMediaFile::GetPosition()
 143 {
 144   wxMMtime mm_time = {0, 0, 0};
 145   return mm_time;
 146 }
 147
 148 wxInputStream *wxMMediaFile::GetIRawData()
 149 {
 150   if (!m_istream)
 151     return NULL;
 152
 153   if (!m_seekable && !m_i_temp)
 154     CacheIO();
 155
 156   return (m_i_temp) ? m_i_temp : m_istream;
 157 }
 158
 159 wxOutputStream *wxMMediaFile::GetORawData()
 160 {
 161   if (!m_ostream)
 162     return NULL;
 163
 164   if (!m_seekable && !m_i_temp)
 165     CacheIO();
 166
 167   return (m_o_temp) ? m_o_temp : m_ostream;
 168 }
 169
 170 wxString wxMMediaFile::GetCurrentFile()
 171 {
 172   if (!m_istream && !m_ostream)
 173     return wxString((char *)NULL);
 174
 175   if (!m_mfname && !m_i_temp)
 176     CacheIO();
 177
 178   return (!m_tmpfname.IsEmpty()) ? m_tmpfname : m_mfname;
 179 }
 180
 181 void wxMMediaFile::CacheIO()
 182 {
 183   if ((!m_istream && !m_ostream) || m_i_temp)
 184     return;
 185
 186   m_tmpfname = wxGetTempFileName("mmd");
 187
 188   wxFileStream *tmpstream = new wxFileStream(m_tmpfname);
 189   m_i_temp = tmpstream;
 190   m_o_temp = tmpstream;
 191
 192   if (m_istream)
 193     tmpstream->wxOutputStream::Write(*m_istream);
 194 }