Throttle media decoding after excessive Android media server crashes

content/browser/media/android/media_throttler.h

+// Copyright 2015 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.
+
+#ifndef CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_
+#define CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_
+
+#include <jni.h>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/memory/singleton.h"
+
+namespace content {
+
+class MediaThrottler {
+ public:
+  // Called to get the singleton MediaThrottler instance.
+  static MediaThrottler* GetInstance();
+
+  // Jni registration.
+  static bool RegisterMediaThrottler(JNIEnv* env);
+
+  virtual ~MediaThrottler();
+
+  // Called to request the permission to decode media data. Returns true if
+  // permitted, or false otherwise.
+  bool RequestDecoderResources();
+
+  // Called when a decode request finishes.
+  void OnDecodeRequestFinished();
+
+  // Resets the throttler to a fresh state.
+  void Reset();
+
+ private:
+  friend struct base::DefaultSingletonTraits<MediaThrottler>;
+  MediaThrottler();
+
+  base::android::ScopedJavaGlobalRef<jobject> j_media_throttler_;
+  DISALLOW_COPY_AND_ASSIGN(MediaThrottler);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_