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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/media.h"
#include "base/files/file_path.h"
#include "base/lazy_instance.h"
#include "base/path_service.h"
#include "base/synchronization/lock.h"
#include "build/build_config.h"
#include "media/base/yuv_convert.h"
namespace media {
namespace internal {
// Platform specific initialization method.
extern bool InitializeMediaLibraryInternal(const base::FilePath& module_dir);
} // namespace internal
// Media must only be initialized once, so use a LazyInstance to ensure this.
class MediaInitializer {
public:
bool Initialize(const base::FilePath& module_dir) {
base::AutoLock auto_lock(lock_);
if (!tried_initialize_) {
tried_initialize_ = true;
initialized_ = internal::InitializeMediaLibraryInternal(module_dir);
}
return initialized_;
}
bool IsInitialized() {
base::AutoLock auto_lock(lock_);
return initialized_;
}
private:
friend struct base::DefaultLazyInstanceTraits<MediaInitializer>;
MediaInitializer()
: initialized_(false),
tried_initialize_(false) {
// Perform initialization of libraries which require runtime CPU detection.
InitializeCPUSpecificYUVConversions();
}
~MediaInitializer() {
NOTREACHED() << "MediaInitializer should be leaky!";
}
base::Lock lock_;
bool initialized_;
bool tried_initialize_;
DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
};
static base::LazyInstance<MediaInitializer>::Leaky g_media_library =
LAZY_INSTANCE_INITIALIZER;
bool InitializeMediaLibrary(const base::FilePath& module_dir) {
return g_media_library.Get().Initialize(module_dir);
}
void InitializeMediaLibraryForTesting() {
base::FilePath module_dir;
CHECK(PathService::Get(base::DIR_EXE, &module_dir));
CHECK(g_media_library.Get().Initialize(module_dir));
}
bool IsMediaLibraryInitialized() {
return g_media_library.Get().IsInitialized();
}
void InitializeCPUSpecificMediaFeatures() {
// Force initialization of the media initializer, but don't call Initialize().
g_media_library.Get();
}
} // namespace media
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