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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /dom/media/platforms/apple/AppleCMLinker.cpp | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/media/platforms/apple/AppleCMLinker.cpp')
-rw-r--r-- | dom/media/platforms/apple/AppleCMLinker.cpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/media/platforms/apple/AppleCMLinker.cpp b/dom/media/platforms/apple/AppleCMLinker.cpp new file mode 100644 index 000000000..5227bf9e5 --- /dev/null +++ b/dom/media/platforms/apple/AppleCMLinker.cpp @@ -0,0 +1,104 @@ +/* -*- 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 <dlfcn.h> + +#include "AppleCMLinker.h" +#include "mozilla/ArrayUtils.h" +#include "nsDebug.h" + +#define LOG(...) MOZ_LOG(sPDMLog, mozilla::LogLevel::Debug, (__VA_ARGS__)) + +namespace mozilla { + +AppleCMLinker::LinkStatus +AppleCMLinker::sLinkStatus = LinkStatus_INIT; + +void* AppleCMLinker::sLink = nullptr; +CFStringRef AppleCMLinker::skPropExtensionAtoms = nullptr; +CFStringRef AppleCMLinker::skPropFullRangeVideo = nullptr; + +#define LINK_FUNC(func) typeof(CM ## func) CM ## func; +#include "AppleCMFunctions.h" +#undef LINK_FUNC + +/* static */ bool +AppleCMLinker::Link() +{ + if (sLinkStatus) { + return sLinkStatus == LinkStatus_SUCCEEDED; + } + + const char* dlnames[] = + { "/System/Library/Frameworks/CoreMedia.framework/CoreMedia", + "/System/Library/PrivateFrameworks/CoreMedia.framework/CoreMedia" }; + bool dlfound = false; + for (size_t i = 0; i < ArrayLength(dlnames); i++) { + if ((sLink = dlopen(dlnames[i], RTLD_NOW | RTLD_LOCAL))) { + dlfound = true; + break; + } + } + if (!dlfound) { + NS_WARNING("Couldn't load CoreMedia framework"); + goto fail; + } + +#define LINK_FUNC2(func) \ + func = (typeof(func))dlsym(sLink, #func); \ + if (!func) { \ + NS_WARNING("Couldn't load CoreMedia function " #func ); \ + goto fail; \ + } +#define LINK_FUNC(func) LINK_FUNC2(CM ## func) +#include "AppleCMFunctions.h" +#undef LINK_FUNC +#undef LINK_FUNC2 + + skPropExtensionAtoms = + GetIOConst("kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms"); + + skPropFullRangeVideo = + GetIOConst("kCMFormatDescriptionExtension_FullRangeVideo"); + + if (!skPropExtensionAtoms) { + goto fail; + } + + LOG("Loaded CoreMedia framework."); + sLinkStatus = LinkStatus_SUCCEEDED; + return true; + +fail: + Unlink(); + + sLinkStatus = LinkStatus_FAILED; + return false; +} + +/* static */ void +AppleCMLinker::Unlink() +{ + if (sLink) { + LOG("Unlinking CoreMedia framework."); + dlclose(sLink); + sLink = nullptr; + sLinkStatus = LinkStatus_INIT; + } +} + +/* static */ CFStringRef +AppleCMLinker::GetIOConst(const char* symbol) +{ + CFStringRef* address = (CFStringRef*)dlsym(sLink, symbol); + if (!address) { + return nullptr; + } + + return *address; +} + +} // namespace mozilla |