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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "FFVPXRuntimeLinker.h"
#include "FFmpegLibWrapper.h"
#include "FFmpegLog.h"
#include "mozilla/FileUtils.h"
#include "nsLocalFile.h"
#include "nsXPCOMPrivate.h"
#include "prlink.h"
namespace mozilla {
template <int V>
class FFmpegDecoderModule {
public:
static already_AddRefed<PlatformDecoderModule> Create(FFmpegLibWrapper*);
};
template <int V>
class FFmpegEncoderModule {
public:
static already_AddRefed<PlatformEncoderModule> Create(FFmpegLibWrapper*);
};
static FFmpegLibWrapper sFFVPXLib;
StaticMutex FFVPXRuntimeLinker::sMutex;
FFVPXRuntimeLinker::LinkStatus FFVPXRuntimeLinker::sLinkStatus =
LinkStatus_INIT;
static PRLibrary* MozAVLink(nsIFile* aFile) {
PRLibSpec lspec;
PathString path = aFile->NativePath();
#ifdef XP_WIN
lspec.type = PR_LibSpec_PathnameU;
lspec.value.pathname_u = path.get();
#else
# if defined(XP_OPENBSD)
/* on OpenBSD, libmozavcodec.so and libmozavutil.so are preloaded before
* sandboxing so make sure only the filename is passed to
* PR_LoadLibraryWithFlags(), dlopen() will return the preloaded library
* handle instead of failing to find it due to sandboxing */
nsAutoCString leaf;
nsresult rv = aFile->GetNativeLeafName(leaf);
if (NS_SUCCEEDED(rv)) {
path = PathString(leaf);
}
# endif // defined(XP_OPENBSD)
lspec.type = PR_LibSpec_Pathname;
lspec.value.pathname = path.get();
#endif
#ifdef MOZ_WIDGET_ANDROID
PRLibrary* lib = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_GLOBAL);
#else
PRLibrary* lib = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
#endif
if (!lib) {
FFMPEGV_LOG("unable to load library %s", aFile->HumanReadablePath().get());
}
return lib;
}
/* static */
bool FFVPXRuntimeLinker::Init() {
// Enter critical section to set up ffvpx.
StaticMutexAutoLock lock(sMutex);
if (sLinkStatus) {
return sLinkStatus == LinkStatus_SUCCEEDED;
}
sLinkStatus = LinkStatus_FAILED;
#ifdef MOZ_WIDGET_GTK
sFFVPXLib.LinkVAAPILibs();
#endif
#ifdef XP_WIN
PathString path =
GetLibraryFilePathname(LXUL_DLL, (PRFuncPtr)&FFVPXRuntimeLinker::Init);
#else
PathString path =
GetLibraryFilePathname(XUL_DLL, (PRFuncPtr)&FFVPXRuntimeLinker::Init);
#endif
if (path.IsEmpty()) {
return false;
}
nsCOMPtr<nsIFile> libFile = new nsLocalFile(path);
if (libFile->NativePath().IsEmpty()) {
return false;
}
if (getenv("MOZ_RUN_GTEST")
#ifdef FUZZING
|| getenv("FUZZER")
#endif
) {
// The condition above is the same as in
// xpcom/glue/standalone/nsXPCOMGlue.cpp. This means we can't reach here
// without the gtest libxul being loaded. In turn, that means the path to
// libxul leads to a subdirectory of where the libmozav* libraries are, so
// we get the parent.
nsCOMPtr<nsIFile> parent;
if (NS_FAILED(libFile->GetParent(getter_AddRefs(parent)))) {
return false;
}
libFile = parent;
}
if (NS_FAILED(libFile->SetNativeLeafName(MOZ_DLL_PREFIX
"mozavutil" MOZ_DLL_SUFFIX ""_ns))) {
return false;
}
sFFVPXLib.mAVUtilLib = MozAVLink(libFile);
if (NS_FAILED(libFile->SetNativeLeafName(
MOZ_DLL_PREFIX "mozavcodec" MOZ_DLL_SUFFIX ""_ns))) {
return false;
}
sFFVPXLib.mAVCodecLib = MozAVLink(libFile);
FFmpegLibWrapper::LinkResult res = sFFVPXLib.Link();
FFMPEGP_LOG("Link result: %s", FFmpegLibWrapper::LinkResultToString(res));
if (res == FFmpegLibWrapper::LinkResult::Success) {
sLinkStatus = LinkStatus_SUCCEEDED;
return true;
}
return false;
}
/* static */
already_AddRefed<PlatformDecoderModule> FFVPXRuntimeLinker::CreateDecoder() {
if (!Init()) {
return nullptr;
}
return FFmpegDecoderModule<FFVPX_VERSION>::Create(&sFFVPXLib);
}
/* static */
already_AddRefed<PlatformEncoderModule> FFVPXRuntimeLinker::CreateEncoder() {
if (!Init()) {
return nullptr;
}
return FFmpegEncoderModule<FFVPX_VERSION>::Create(&sFFVPXLib);
}
/* static */
void FFVPXRuntimeLinker::GetFFTFuncs(FFmpegFFTFuncs* aOutFuncs) {
[]() MOZ_NO_THREAD_SAFETY_ANALYSIS {
MOZ_ASSERT(sLinkStatus != LinkStatus_INIT);
}();
MOZ_ASSERT(sFFVPXLib.av_tx_init && sFFVPXLib.av_tx_uninit);
aOutFuncs->init = sFFVPXLib.av_tx_init;
aOutFuncs->uninit = sFFVPXLib.av_tx_uninit;
}
} // namespace mozilla
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