src/common/mediactrlcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/mediactrl.cpp
   3 // Purpose:     wxMediaCtrl common code
   4 // Author:      Ryan Norton <wxprojects@comcast.net>
   5 // Modified by:
   6 // Created:     11/07/04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Ryan Norton
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 //===========================================================================
  13 // Definitions
  14 //===========================================================================
  15
  16 //---------------------------------------------------------------------------
  17 // Pre-compiled header stuff
  18 //---------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21 #pragma implementation "mediactrl.h"
  22 #endif
  23
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27 #pragma hdrstop
  28 #endif
  29
  30 //---------------------------------------------------------------------------
  31 // Includes
  32 //---------------------------------------------------------------------------
  33 #include "wx/mediactrl.h"
  34 #include "wx/hash.h"
  35
  36 //---------------------------------------------------------------------------
  37 // Compilation guard
  38 //---------------------------------------------------------------------------
  39 #if wxUSE_MEDIACTRL
  40
  41 //===========================================================================
  42 //
  43 // Implementation
  44 //
  45 //===========================================================================
  46
  47 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  48 // RTTI and Event implementations
  49 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  50
  51 IMPLEMENT_CLASS(wxMediaCtrl, wxControl);
  52 IMPLEMENT_CLASS(wxMediaBackend, wxObject);
  53 IMPLEMENT_DYNAMIC_CLASS(wxMediaEvent, wxEvent);
  54 DEFINE_EVENT_TYPE(wxEVT_MEDIA_FINISHED);
  55 DEFINE_EVENT_TYPE(wxEVT_MEDIA_LOADED);
  56 DEFINE_EVENT_TYPE(wxEVT_MEDIA_STOP);
  57
  58 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  59 //
  60 //  wxMediaCtrl
  61 //
  62 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  63
  64 //---------------------------------------------------------------------------
  65 // wxMediaBackend Destructor
  66 //
  67 // This is here because the DARWIN gcc compiler badly screwed up and
  68 // needs the destructor implementation in the source
  69 //---------------------------------------------------------------------------
  70 wxMediaBackend::~wxMediaBackend()
  71 {
  72 }
  73
  74 //---------------------------------------------------------------------------
  75 // wxMediaCtrl::Create (file version)
  76 // wxMediaCtrl::Create (URL version)
  77 //
  78 // Searches for a backend that is installed on the system (backends
  79 // starting with lower characters in the alphabet are given priority),
  80 // and creates the control from it
  81 //
  82 // This searches by searching the global RTTI hashtable, class by class,
  83 // attempting to call CreateControl on each one found that is a derivative
  84 // of wxMediaBackend - if it succeeded Create returns true, otherwise
  85 // it keeps iterating through the hashmap.
  86 //---------------------------------------------------------------------------
  87 bool wxMediaCtrl::Create(wxWindow* parent, wxWindowID id,
  88                 const wxString& fileName,
  89                 const wxPoint& pos,
  90                 const wxSize& size,
  91                 long style,
  92                 const wxString& szBackend,
  93                 const wxValidator& validator,
  94                 const wxString& name)
  95 {
  96     if(!szBackend.empty())
  97     {
  98         wxClassInfo* pClassInfo = wxClassInfo::FindClass(szBackend);
  99
 100         if(!pClassInfo || !DoCreate(pClassInfo, parent, id,
 101                                     pos, size, style, validator, name))
 102         {
 103             m_imp = NULL;
 104             return false;
 105         }
 106
 107         if (!fileName.empty())
 108         {
 109             if (!Load(fileName))
 110             {
 111                 delete m_imp;
 112                 m_imp = NULL;
 113                 return false;
 114             }
 115         }
 116
 117         SetBestFittingSize(size);
 118         return true;
 119     }
 120     else
 121     {
 122         wxClassInfo::sm_classTable->BeginFind();
 123
 124         wxClassInfo* classInfo;
 125
 126         while((classInfo = NextBackend()) != NULL)
 127         {
 128             if(!DoCreate(classInfo, parent, id,
 129                          pos, size, style, validator, name))
 130                 continue;
 131
 132             if (!fileName.empty())
 133             {
 134                 if (Load(fileName))
 135                 {
 136                     SetBestFittingSize(size);
 137                     return true;
 138                 }
 139                 else
 140                     delete m_imp;
 141             }
 142             else
 143             {
 144                 SetBestFittingSize(size);
 145                 return true;
 146             }
 147         }
 148
 149         m_imp = NULL;
 150         return false;
 151     }
 152 }
 153
 154 bool wxMediaCtrl::Create(wxWindow* parent, wxWindowID id,
 155                          const wxURI& location,
 156                          const wxPoint& pos,
 157                          const wxSize& size,
 158                          long style,
 159                          const wxString& szBackend,
 160                          const wxValidator& validator,
 161                          const wxString& name)
 162 {
 163     if(!szBackend.empty())
 164     {
 165         wxClassInfo* pClassInfo = wxClassInfo::FindClass(szBackend);
 166         if(!pClassInfo || !DoCreate(pClassInfo, parent, id,
 167                                     pos, size, style, validator, name))
 168         {
 169             m_imp = NULL;
 170             return false;
 171         }
 172
 173         if (!Load(location))
 174         {
 175             delete m_imp;
 176             m_imp = NULL;
 177             return false;
 178         }
 179
 180         SetBestFittingSize(size);
 181         return true;
 182     }
 183     else
 184     {
 185         wxClassInfo::sm_classTable->BeginFind();
 186
 187         wxClassInfo* classInfo;
 188
 189         while((classInfo = NextBackend()) != NULL)
 190         {
 191             if(!DoCreate(classInfo, parent, id,
 192                          pos, size, style, validator, name))
 193                 continue;
 194
 195             if (Load(location))
 196             {
 197                 SetBestFittingSize(size);
 198                 return true;
 199             }
 200             else
 201                 delete m_imp;
 202         }
 203
 204         m_imp = NULL;
 205         return false;
 206     }
 207 }
 208
 209 //---------------------------------------------------------------------------
 210 // wxMediaCtrl::DoCreate
 211 //
 212 // Attempts to create the control from a backend
 213 //---------------------------------------------------------------------------
 214 bool wxMediaCtrl::DoCreate(wxClassInfo* classInfo,
 215                             wxWindow* parent, wxWindowID id,
 216                             const wxPoint& pos,
 217                             const wxSize& size,
 218                             long style,
 219                             const wxValidator& validator,
 220                             const wxString& name)
 221 {
 222     m_imp = (wxMediaBackend*)classInfo->CreateObject();
 223
 224     if( m_imp->CreateControl(this, parent, id, pos, size,
 225                              style, validator, name) )
 226     {
 227         return true;
 228     }
 229
 230     delete m_imp;
 231     return false;
 232 }
 233
 234 //---------------------------------------------------------------------------
 235 // wxMediaCtrl::NextBackend
 236 //
 237 //
 238 // Search through the RTTI hashmap one at a
 239 // time, attempting to create each derivative
 240 // of wxMediaBackend
 241 //
 242 //
 243 // STL isn't compatible with and will have a compilation error
 244 // on a wxNode, however, wxHashTable::compatibility_iterator is
 245 // incompatible with the old 2.4 stable version - but since
 246 // we're in 2.5 only we don't need to worry about this
 247 // static
 248 //---------------------------------------------------------------------------
 249 wxClassInfo* wxMediaCtrl::NextBackend()
 250 {
 251     wxHashTable::compatibility_iterator
 252             node = wxClassInfo::sm_classTable->Next();
 253     while (node)
 254     {
 255         wxClassInfo* classInfo = (wxClassInfo *)node->GetData();
 256         if ( classInfo->IsKindOf(CLASSINFO(wxMediaBackend)) &&
 257              classInfo != CLASSINFO(wxMediaBackend) )
 258         {
 259             return classInfo;
 260         }
 261         node = wxClassInfo::sm_classTable->Next();
 262     }
 263
 264     //
 265     // Nope - couldn't successfully find one... fail
 266     //
 267     return NULL;
 268 }
 269
 270
 271 //---------------------------------------------------------------------------
 272 // wxMediaCtrl Destructor
 273 //
 274 // Free up the backend if it exists
 275 //---------------------------------------------------------------------------
 276 wxMediaCtrl::~wxMediaCtrl()
 277 {
 278     if (m_imp)
 279         delete m_imp;
 280 }
 281
 282 //---------------------------------------------------------------------------
 283 // wxMediaCtrl::Load (file version)
 284 // wxMediaCtrl::Load (URL version)
 285 // wxMediaCtrl::Load (URL & Proxy version)
 286 // wxMediaCtrl::Load (wxInputStream version)
 287 //
 288 // Here we call load of the backend - keeping
 289 // track of whether it was successful or not - which
 290 // will determine which later method calls work
 291 //---------------------------------------------------------------------------
 292 bool wxMediaCtrl::Load(const wxString& fileName)
 293 {
 294     if(m_imp)
 295         return (m_bLoaded = m_imp->Load(fileName));
 296     return false;
 297 }
 298
 299 bool wxMediaCtrl::Load(const wxURI& location)
 300 {
 301     if(m_imp)
 302         return (m_bLoaded = m_imp->Load(location));
 303     return false;
 304 }
 305
 306 bool wxMediaCtrl::Load(const wxURI& location, const wxURI& proxy)
 307 {
 308     if(m_imp)
 309         return (m_bLoaded = m_imp->Load(location, proxy));
 310     return false;
 311 }
 312
 313 //---------------------------------------------------------------------------
 314 // wxMediaCtrl::Play
 315 // wxMediaCtrl::Pause
 316 // wxMediaCtrl::Stop
 317 // wxMediaCtrl::GetPlaybackRate
 318 // wxMediaCtrl::SetPlaybackRate
 319 // wxMediaCtrl::Seek --> SetPosition
 320 // wxMediaCtrl::Tell --> GetPosition
 321 // wxMediaCtrl::Length --> GetDuration
 322 // wxMediaCtrl::GetState
 323 // wxMediaCtrl::DoGetBestSize
 324 // wxMediaCtrl::SetVolume
 325 // wxMediaCtrl::GetVolume
 326 // wxMediaCtrl::ShowInterface
 327 // wxMediaCtrl::GetDownloadProgress
 328 // wxMediaCtrl::GetDownloadTotal
 329 //
 330 // 1) Check to see whether the backend exists and is loading
 331 // 2) Call the backend's version of the method, returning success
 332 //    if the backend's version succeeds
 333 //---------------------------------------------------------------------------
 334 bool wxMediaCtrl::Play()
 335 {
 336     if(m_imp && m_bLoaded)
 337         return m_imp->Play();
 338     return 0;
 339 }
 340
 341 bool wxMediaCtrl::Pause()
 342 {
 343     if(m_imp && m_bLoaded)
 344         return m_imp->Pause();
 345     return 0;
 346 }
 347
 348 bool wxMediaCtrl::Stop()
 349 {
 350     if(m_imp && m_bLoaded)
 351         return m_imp->Stop();
 352     return 0;
 353 }
 354
 355 double wxMediaCtrl::GetPlaybackRate()
 356 {
 357     if(m_imp && m_bLoaded)
 358         return m_imp->GetPlaybackRate();
 359     return 0;
 360 }
 361
 362 bool wxMediaCtrl::SetPlaybackRate(double dRate)
 363 {
 364     if(m_imp && m_bLoaded)
 365         return m_imp->SetPlaybackRate(dRate);
 366     return false;
 367 }
 368
 369 wxFileOffset wxMediaCtrl::Seek(wxFileOffset where, wxSeekMode mode)
 370 {
 371     wxFileOffset offset;
 372
 373     switch (mode)
 374     {
 375     case wxFromStart:
 376         offset = where;
 377         break;
 378     case wxFromEnd:
 379         offset = Length() - where;
 380         break;
 381 //    case wxFromCurrent:
 382     default:
 383         offset = Tell() + where;
 384         break;
 385     }
 386
 387     if(m_imp && m_bLoaded && m_imp->SetPosition(offset))
 388         return offset;
 389     return wxInvalidOffset;
 390 }
 391
 392 wxFileOffset wxMediaCtrl::Tell()
 393 {
 394     if(m_imp && m_bLoaded)
 395         return (wxFileOffset) m_imp->GetPosition().ToLong();
 396     return wxInvalidOffset;
 397 }
 398
 399 wxFileOffset wxMediaCtrl::Length()
 400 {
 401     if(m_imp && m_bLoaded)
 402         return (wxFileOffset) m_imp->GetDuration().ToLong();
 403     return wxInvalidOffset;
 404 }
 405
 406 wxMediaState wxMediaCtrl::GetState()
 407 {
 408     if(m_imp && m_bLoaded)
 409         return m_imp->GetState();
 410     return wxMEDIASTATE_STOPPED;
 411 }
 412
 413 wxSize wxMediaCtrl::DoGetBestSize() const
 414 {
 415     if(m_imp)
 416         return m_imp->GetVideoSize();
 417     return wxSize(0,0);
 418 }
 419
 420 double wxMediaCtrl::GetVolume()
 421 {
 422     if(m_imp && m_bLoaded)
 423         return m_imp->GetVolume();
 424     return 0.0;
 425 }
 426
 427 bool wxMediaCtrl::SetVolume(double dVolume)
 428 {
 429     if(m_imp && m_bLoaded)
 430         return m_imp->SetVolume(dVolume);
 431     return false;
 432 }
 433
 434 bool wxMediaCtrl::ShowPlayerControls(wxMediaCtrlPlayerControls flags)
 435 {
 436     if(m_imp)
 437         return m_imp->ShowPlayerControls(flags);
 438     return false;
 439 }
 440
 441 wxFileOffset wxMediaCtrl::GetDownloadProgress()
 442 {
 443     if(m_imp && m_bLoaded)
 444         return (wxFileOffset) m_imp->GetDownloadProgress().ToLong();
 445     return wxInvalidOffset;
 446 }
 447
 448 wxFileOffset wxMediaCtrl::GetDownloadTotal()
 449 {
 450     if(m_imp && m_bLoaded)
 451         return (wxFileOffset) m_imp->GetDownloadTotal().ToLong();
 452     return wxInvalidOffset;
 453 }
 454
 455 //---------------------------------------------------------------------------
 456 // wxMediaCtrl::DoMoveWindow
 457 //
 458 // 1) Call parent's version so that our control's window moves where
 459 //    it's supposed to
 460 // 2) If the backend exists and is loaded, move the video
 461 //    of the media to where our control's window is now located
 462 //---------------------------------------------------------------------------
 463 void wxMediaCtrl::DoMoveWindow(int x, int y, int w, int h)
 464 {
 465     wxControl::DoMoveWindow(x,y,w,h);
 466
 467     if(m_imp)
 468         m_imp->Move(x, y, w, h);
 469 }
 470
 471 #include "wx/html/forcelnk.h"
 472 FORCE_LINK(basewxmediabackends);
 473
 474 //---------------------------------------------------------------------------
 475 // End of compilation guard and of file
 476 //---------------------------------------------------------------------------
 477 #endif //wxUSE_MEDIACTRL
 478
 479