mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-06-25 20:29:33 +00:00
120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <dlfcn.h>
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#include "AppleVDALinker.h"
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#include "MainThreadUtils.h"
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#include "nsDebug.h"
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extern mozilla::LogModule* GetPDMLog();
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#define LOG(...) MOZ_LOG(GetPDMLog(), mozilla::LogLevel::Debug, (__VA_ARGS__))
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namespace mozilla {
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AppleVDALinker::LinkStatus
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AppleVDALinker::sLinkStatus = LinkStatus_INIT;
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void* AppleVDALinker::sLink = nullptr;
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nsrefcnt AppleVDALinker::sRefCount = 0;
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CFStringRef AppleVDALinker::skPropWidth = nullptr;
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CFStringRef AppleVDALinker::skPropHeight = nullptr;
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CFStringRef AppleVDALinker::skPropSourceFormat = nullptr;
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CFStringRef AppleVDALinker::skPropAVCCData = nullptr;
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#define LINK_FUNC(func) typeof(func) func;
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#include "AppleVDAFunctions.h"
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#undef LINK_FUNC
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/* static */ bool
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AppleVDALinker::Link()
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{
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// Bump our reference count every time we're called.
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// Add a lock or change the thread assertion if
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// you need to call this off the main thread.
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MOZ_ASSERT(NS_IsMainThread());
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++sRefCount;
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if (sLinkStatus) {
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return sLinkStatus == LinkStatus_SUCCEEDED;
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}
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const char* dlname =
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"/System/Library/Frameworks/VideoDecodeAcceleration.framework/VideoDecodeAcceleration";
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if (!(sLink = dlopen(dlname, RTLD_NOW | RTLD_LOCAL))) {
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NS_WARNING("Couldn't load VideoDecodeAcceleration framework");
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goto fail;
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}
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#define LINK_FUNC(func) \
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func = (typeof(func))dlsym(sLink, #func); \
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if (!func) { \
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NS_WARNING("Couldn't load VideoDecodeAcceleration function " #func ); \
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goto fail; \
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}
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#include "AppleVDAFunctions.h"
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#undef LINK_FUNC
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skPropWidth = GetIOConst("kVDADecoderConfiguration_Width");
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skPropHeight = GetIOConst("kVDADecoderConfiguration_Height");
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skPropSourceFormat = GetIOConst("kVDADecoderConfiguration_SourceFormat");
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skPropAVCCData = GetIOConst("kVDADecoderConfiguration_avcCData");
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if (!skPropWidth || !skPropHeight || !skPropSourceFormat || !skPropAVCCData) {
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goto fail;
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}
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LOG("Loaded VideoDecodeAcceleration framework.");
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sLinkStatus = LinkStatus_SUCCEEDED;
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return true;
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fail:
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Unlink();
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sLinkStatus = LinkStatus_FAILED;
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return false;
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}
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/* static */ void
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AppleVDALinker::Unlink()
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{
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// We'll be called by multiple Decoders, one intantiated for
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// each media element. Therefore we receive must maintain a
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// reference count to avoidunloading our symbols when other
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// instances still need them.
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(sRefCount > 0, "Unbalanced Unlink()");
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--sRefCount;
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if (sLink && sRefCount < 1) {
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LOG("Unlinking VideoDecodeAcceleration framework.");
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#define LINK_FUNC(func) \
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func = nullptr;
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#include "AppleVDAFunctions.h"
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#undef LINK_FUNC
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dlclose(sLink);
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sLink = nullptr;
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skPropWidth = nullptr;
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skPropHeight = nullptr;
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skPropSourceFormat = nullptr;
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skPropAVCCData = nullptr;
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sLinkStatus = LinkStatus_INIT;
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}
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}
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/* static */ CFStringRef
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AppleVDALinker::GetIOConst(const char* symbol)
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{
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CFStringRef* address = (CFStringRef*)dlsym(sLink, symbol);
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if (!address) {
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return nullptr;
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}
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return *address;
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}
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} // namespace mozilla
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