mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-27 14:56:16 +00:00
121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/* -*- 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 "AppleVTLinker.h"
|
|
#include "MainThreadUtils.h"
|
|
#include "mozilla/ArrayUtils.h"
|
|
#include "nsDebug.h"
|
|
|
|
extern mozilla::LogModule* GetPDMLog();
|
|
#define LOG(...) MOZ_LOG(GetPDMLog(), mozilla::LogLevel::Debug, (__VA_ARGS__))
|
|
|
|
namespace mozilla {
|
|
|
|
AppleVTLinker::LinkStatus
|
|
AppleVTLinker::sLinkStatus = LinkStatus_INIT;
|
|
|
|
void* AppleVTLinker::sLink = nullptr;
|
|
nsrefcnt AppleVTLinker::sRefCount = 0;
|
|
CFStringRef AppleVTLinker::skPropEnableHWAccel = nullptr;
|
|
CFStringRef AppleVTLinker::skPropUsingHWAccel = nullptr;
|
|
|
|
#define LINK_FUNC(func) typeof(func) func;
|
|
#include "AppleVTFunctions.h"
|
|
#undef LINK_FUNC
|
|
|
|
/* static */ bool
|
|
AppleVTLinker::Link()
|
|
{
|
|
// Bump our reference count every time we're called.
|
|
// Add a lock or change the thread assertion if
|
|
// you need to call this off the main thread.
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
++sRefCount;
|
|
|
|
if (sLinkStatus) {
|
|
return sLinkStatus == LinkStatus_SUCCEEDED;
|
|
}
|
|
|
|
const char* dlnames[] =
|
|
{ "/System/Library/Frameworks/VideoToolbox.framework/VideoToolbox",
|
|
"/System/Library/PrivateFrameworks/VideoToolbox.framework/VideoToolbox" };
|
|
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 VideoToolbox framework");
|
|
goto fail;
|
|
}
|
|
|
|
#define LINK_FUNC(func) \
|
|
func = (typeof(func))dlsym(sLink, #func); \
|
|
if (!func) { \
|
|
NS_WARNING("Couldn't load VideoToolbox function " #func ); \
|
|
goto fail; \
|
|
}
|
|
#include "AppleVTFunctions.h"
|
|
#undef LINK_FUNC
|
|
|
|
// Will only resolve in 10.9 and later.
|
|
skPropEnableHWAccel =
|
|
GetIOConst("kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder");
|
|
skPropUsingHWAccel =
|
|
GetIOConst("kVTDecompressionPropertyKey_UsingHardwareAcceleratedVideoDecoder");
|
|
|
|
LOG("Loaded VideoToolbox framework.");
|
|
sLinkStatus = LinkStatus_SUCCEEDED;
|
|
return true;
|
|
|
|
fail:
|
|
Unlink();
|
|
|
|
sLinkStatus = LinkStatus_FAILED;
|
|
return false;
|
|
}
|
|
|
|
/* static */ void
|
|
AppleVTLinker::Unlink()
|
|
{
|
|
// We'll be called by multiple Decoders, one intantiated for
|
|
// each media element. Therefore we receive must maintain a
|
|
// reference count to avoidunloading our symbols when other
|
|
// instances still need them.
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
MOZ_ASSERT(sRefCount > 0, "Unbalanced Unlink()");
|
|
--sRefCount;
|
|
if (sLink && sRefCount < 1) {
|
|
LOG("Unlinking VideoToolbox framework.");
|
|
#define LINK_FUNC(func) \
|
|
func = nullptr;
|
|
#include "AppleVTFunctions.h"
|
|
#undef LINK_FUNC
|
|
dlclose(sLink);
|
|
sLink = nullptr;
|
|
skPropEnableHWAccel = nullptr;
|
|
skPropUsingHWAccel = nullptr;
|
|
sLinkStatus = LinkStatus_INIT;
|
|
}
|
|
}
|
|
|
|
/* static */ CFStringRef
|
|
AppleVTLinker::GetIOConst(const char* symbol)
|
|
{
|
|
CFStringRef* address = (CFStringRef*)dlsym(sLink, symbol);
|
|
if (!address) {
|
|
return nullptr;
|
|
}
|
|
|
|
return *address;
|
|
}
|
|
|
|
} // namespace mozilla
|