Revert "Chromium changes to statically link ffmpeg."

media/base/media.cc

 // 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"
 
-#if !defined(MEDIA_DISABLE_FFMPEG)
-#include "media/ffmpeg/ffmpeg_common.h"
-#endif
+namespace media {
 
-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() {
+  MediaInitializer()
+      : initialized_(false),
+        tried_initialize_(false) {
     // Perform initialization of libraries which require runtime CPU detection.
     InitializeCPUSpecificYUVConversions();
-
-#if !defined(MEDIA_DISABLE_FFMPEG)
-    // Disable logging as it interferes with layout tests.
-    av_log_set_level(AV_LOG_QUIET);
-
-#if defined(ALLOCATOR_SHIM)
-    // Remove allocation limit from ffmpeg, so calls go down to shim layer.
-    av_max_alloc(0);
-#endif  // defined(ALLOCATOR_SHIM)
-
-#endif  // !defined(MEDIA_DISABLE_FFMPEG)
   }
 
   ~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;
 
-void InitializeMediaLibrary() {
+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