Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "FFVPXRuntimeLinker.h"
       8             : #include "FFmpegLibWrapper.h"
       9             : #include "FFmpegLog.h"
      10             : #include "nsIFile.h"
      11             : #include "prmem.h"
      12             : #include "prlink.h"
      13             : 
      14             : // We use a known symbol located in lgpllibs to determine its location.
      15             : // soundtouch happens to be always included in lgpllibs
      16             : #include "soundtouch/SoundTouch.h"
      17             : 
      18             : namespace mozilla {
      19             : 
      20             : template <int V> class FFmpegDecoderModule
      21             : {
      22             : public:
      23             :   static already_AddRefed<PlatformDecoderModule> Create(FFmpegLibWrapper*);
      24             : };
      25             : 
      26           3 : static FFmpegLibWrapper sFFVPXLib;
      27             : 
      28             : FFVPXRuntimeLinker::LinkStatus FFVPXRuntimeLinker::sLinkStatus =
      29             :   LinkStatus_INIT;
      30             : 
      31             : static PRLibrary*
      32           0 : MozAVLink(const char* aName)
      33             : {
      34             :   PRLibSpec lspec;
      35           0 :   lspec.type = PR_LibSpec_Pathname;
      36           0 :   lspec.value.pathname = aName;
      37           0 :   PRLibrary* lib = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
      38           0 :   if (!lib) {
      39           0 :     FFMPEG_LOG("unable to load library %s", aName);
      40             :   }
      41           0 :   return lib;
      42             : }
      43             : 
      44             : /* static */ bool
      45           0 : FFVPXRuntimeLinker::Init()
      46             : {
      47           0 :   if (sLinkStatus) {
      48           0 :     return sLinkStatus == LinkStatus_SUCCEEDED;
      49             :   }
      50             : 
      51           0 :   sLinkStatus = LinkStatus_FAILED;
      52             : 
      53             :   // We retrieve the path of the lgpllibs library as this is where mozavcodec
      54             :   // and mozavutil libs are located.
      55           0 :   char* lgpllibsname = PR_GetLibraryName(nullptr, "lgpllibs");
      56           0 :   if (!lgpllibsname) {
      57           0 :     return false;
      58             :   }
      59             :   char* path =
      60             :     PR_GetLibraryFilePathname(lgpllibsname,
      61           0 :                               (PRFuncPtr)&soundtouch::SoundTouch::getVersionId);
      62           0 :   PR_FreeLibraryName(lgpllibsname);
      63           0 :   if (!path) {
      64           0 :     return false;
      65             :   }
      66           0 :   nsCOMPtr<nsIFile> xulFile = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID);
      67           0 :   if (!xulFile ||
      68           0 :       NS_FAILED(xulFile->InitWithNativePath(nsDependentCString(path)))) {
      69           0 :     PR_Free(path); // PR_GetLibraryFilePathname() uses PR_Malloc().
      70           0 :     return false;
      71             :   }
      72           0 :   PR_Free(path); // PR_GetLibraryFilePathname() uses PR_Malloc().
      73             : 
      74           0 :   nsCOMPtr<nsIFile> rootDir;
      75           0 :   if (NS_FAILED(xulFile->GetParent(getter_AddRefs(rootDir))) || !rootDir) {
      76           0 :     return false;
      77             :   }
      78           0 :   nsAutoCString rootPath;
      79           0 :   if (NS_FAILED(rootDir->GetNativePath(rootPath))) {
      80           0 :     return false;
      81             :   }
      82             : 
      83           0 :   char* libname = NULL;
      84             :   /* Get the platform-dependent library name of the module */
      85           0 :   libname = PR_GetLibraryName(rootPath.get(), "mozavutil");
      86           0 :   if (!libname) {
      87           0 :     return false;
      88             :   }
      89           0 :   sFFVPXLib.mAVUtilLib = MozAVLink(libname);
      90           0 :   PR_FreeLibraryName(libname);
      91           0 :   libname = PR_GetLibraryName(rootPath.get(), "mozavcodec");
      92           0 :   if (libname) {
      93           0 :     sFFVPXLib.mAVCodecLib = MozAVLink(libname);
      94           0 :     PR_FreeLibraryName(libname);
      95             :   }
      96           0 :   if (sFFVPXLib.Link() == FFmpegLibWrapper::LinkResult::Success) {
      97           0 :     sLinkStatus = LinkStatus_SUCCEEDED;
      98           0 :     return true;
      99             :   }
     100           0 :   return false;
     101             : }
     102             : 
     103             : /* static */ already_AddRefed<PlatformDecoderModule>
     104           0 : FFVPXRuntimeLinker::CreateDecoderModule()
     105             : {
     106           0 :   if (!Init()) {
     107           0 :     return nullptr;
     108             :   }
     109           0 :   return FFmpegDecoderModule<FFVPX_VERSION>::Create(&sFFVPXLib);
     110             : }
     111             : 
     112           9 : } // namespace mozilla