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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/media/platforms/apple/AppleVTLinker.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/media/platforms/apple/AppleVTLinker.cpp')
-rw-r--r--dom/media/platforms/apple/AppleVTLinker.cpp104
1 files changed, 104 insertions, 0 deletions
diff --git a/dom/media/platforms/apple/AppleVTLinker.cpp b/dom/media/platforms/apple/AppleVTLinker.cpp
new file mode 100644
index 000000000..51a8a0122
--- /dev/null
+++ b/dom/media/platforms/apple/AppleVTLinker.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 "AppleVTLinker.h"
+#include "mozilla/ArrayUtils.h"
+#include "nsDebug.h"
+
+#define LOG(...) MOZ_LOG(sPDMLog, mozilla::LogLevel::Debug, (__VA_ARGS__))
+
+namespace mozilla {
+
+AppleVTLinker::LinkStatus
+AppleVTLinker::sLinkStatus = LinkStatus_INIT;
+
+void* AppleVTLinker::sLink = nullptr;
+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()
+{
+ 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()
+{
+ if (sLink) {
+ 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