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
  21 #include "mmfile.h"
  22
  23 #ifdef __BORLANDC__
  24 #pragma hdrstop
  25 #endif
  26
  27 wxMMediaFile::wxMMediaFile()
  28   : m_istream(NULL), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  29     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  30     m_seekable(FALSE)
  31 {
  32 }
  33
  34 wxMMediaFile::wxMMediaFile(wxOutputStream& os, bool seekable)
  35   : m_istream(NULL), m_i_temp(NULL), m_ostream(&os), m_o_temp(NULL),
  36     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  37     m_seekable(seekable)
  38 {
  39 }
  40
  41 wxMMediaFile::wxMMediaFile(wxInputStream& is, bool preload, bool seekable)
  42   : m_istream(&is), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  43     m_tmpfname((char *)NULL), m_mfname((char *)NULL),
  44     m_seekable(seekable)
  45 {
  46   if (preload) {
  47     wxStreamBuffer *streamb = new wxStreamBuffer(wxStreamBuffer::read_write);
  48
  49     streamb->Fixed(FALSE);
  50     streamb->Flushable(FALSE);
  51
  52     m_o_temp = new wxOutputStream(streamb);
  53     m_i_temp = new wxInputStream(streamb);
  54
  55     m_o_temp->Write(is);
  56     streamb->ResetBuffer();
  57   }
  58 }
  59
  60 wxMMediaFile::wxMMediaFile(const wxString& fname)
  61   : m_istream(NULL), m_i_temp(NULL), m_ostream(NULL), m_o_temp(NULL),
  62     m_tmpfname((char *)NULL), m_mfname(fname),
  63     m_seekable(TRUE)
  64 {
  65   wxFileStream *s = new wxFileStream(fname);
  66
  67   m_mfname = fname;
  68   m_istream = s;
  69   m_ostream = s;
  70 }
  71
  72 void wxMMediaFile::SetFile(wxInputStream& str, bool preload, bool seekable)
  73 {
  74   CleanUpPrevious();
  75   m_istream = &str;
  76   m_ostream = NULL;
  77   m_seekable = seekable;
  78
  79   if (preload) {
  80     wxStreamBuffer *streamb = new wxStreamBuffer(wxStreamBuffer::read_write);
  81
  82     streamb->Fixed(FALSE);
  83     streamb->Flushable(FALSE);
  84
  85     m_o_temp = new wxOutputStream(streamb);
  86     m_i_temp = new wxInputStream(streamb);
  87
  88     m_o_temp->Write(str);
  89     streamb->ResetBuffer();
  90   }
  91 }
  92
  93 void wxMMediaFile::SetFile(wxOutputStream& str, bool seekable)
  94 {
  95   CleanUpPrevious();
  96   m_ostream = &str;
  97   m_istream = NULL;
  98   m_seekable = seekable;
  99 }
 100
 101 void wxMMediaFile::SetFile(const wxString& fname)
 102 {
 103   CleanUpPrevious();
 104
 105   m_mfname = fname;
 106   wxFileStream *f = new wxFileStream(fname);
 107
 108   SetFile(*f, FALSE, TRUE);
 109 }
 110
 111 void wxMMediaFile::CleanUpPrevious()
 112 {
 113   if (m_i_temp) {
 114     m_i_temp->SeekI(0);
 115
 116     if (m_ostream)
 117       m_ostream->Write(*m_i_temp);
 118
 119     delete (m_i_temp->InputStreamBuffer());
 120     delete m_i_temp;
 121     delete m_o_temp;
 122
 123     if (m_tmpfname)
 124       wxRemoveFile(m_tmpfname);
 125   }
 126
 127   if (!m_mfname.IsNull() && m_mfname != "")
 128     delete m_istream;
 129
 130   m_i_temp = NULL;
 131   m_o_temp = NULL;
 132   m_istream = NULL;
 133   m_ostream = NULL;
 134 }
 135
 136 wxMMediaFile::~wxMMediaFile()
 137 {
 138   CleanUpPrevious();
 139 }
 140
 141 wxMMtime wxMMediaFile::GetLength()
 142 {
 143   wxMMtime mm_time = {-1, 0, 0};
 144   return mm_time;
 145 }
 146
 147 wxMMtime wxMMediaFile::GetPosition()
 148 {
 149   wxMMtime mm_time = {0, 0, 0};
 150   return mm_time;
 151 }
 152
 153 wxInputStream *wxMMediaFile::GetIRawData()
 154 {
 155   if (!m_istream)
 156     return NULL;
 157
 158   if (!m_seekable && !m_i_temp)
 159     CacheIO();
 160
 161   return (m_i_temp) ? m_i_temp : m_istream;
 162 }
 163
 164 wxOutputStream *wxMMediaFile::GetORawData()
 165 {
 166   if (!m_ostream)
 167     return NULL;
 168
 169   if (!m_seekable && !m_i_temp)
 170     CacheIO();
 171
 172   return (m_o_temp) ? m_o_temp : m_ostream;
 173 }
 174
 175 wxString wxMMediaFile::GetCurrentFile()
 176 {
 177   if (!m_istream && !m_ostream)
 178     return wxString((char *)NULL);
 179
 180   if (!m_mfname && !m_i_temp)
 181     CacheIO();
 182
 183   return (!m_tmpfname.IsEmpty()) ? m_tmpfname : m_mfname;
 184 }
 185
 186 void wxMMediaFile::CacheIO()
 187 {
 188   if ((!m_istream && !m_ostream) || m_i_temp)
 189     return;
 190
 191   m_tmpfname = wxGetTempFileName("mmd");
 192
 193   wxFileStream *tmpstream = new wxFileStream(m_tmpfname);
 194   m_i_temp = tmpstream;
 195   m_o_temp = tmpstream;
 196
 197   if (m_istream)
 198     tmpstream->wxOutputStream::Write(*m_istream);
 199 }