OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef MEDIA_BASE_ANDROID_ANDROID_OVERLAY_CALLBACK_H_ |
| 6 #define MEDIA_BASE_ANDROID_ANDROID_OVERLAY_CALLBACK_H_ |
| 7 |
| 8 #include <jni.h> |
| 9 #include <stddef.h> |
| 10 #include <stdint.h> |
| 11 |
| 12 #include <set> |
| 13 #include <string> |
| 14 |
| 15 #include "base/android/scoped_java_ref.h" |
| 16 #include "base/lazy_instance.h" |
| 17 #include "base/macros.h" |
| 18 #include "base/single_thread_task_runner.h" |
| 19 #include "base/task_runner.h" |
| 20 #include "base/threading/thread_checker.h" |
| 21 #include "base/time/time.h" |
| 22 #include "media/base/android/android_overlay_proxy.h" |
| 23 #include "media/base/media_export.h" |
| 24 #include "ui/gfx/geometry/point.h" |
| 25 #include "ui/gfx/geometry/size.h" |
| 26 |
| 27 namespace media { |
| 28 |
| 29 // This class implements the C++ wrapper around the java AndroidOverlayCallback. |
| 30 // Callbacks will happen on the thread that it's created on. |
| 31 // It handles threading and object lifecycle issues. In particular, it's safe |
| 32 // to delete this object on the same thread as it was created on at any time, |
| 33 // even during a callback. Future callbacks from java will be cancelled |
| 34 // automatically, regardless of java threading. |
| 35 class MEDIA_EXPORT AndroidOverlayCallback { |
| 36 public: |
| 37 // |callback| will be called on the same thread that we're created on, |
| 38 // regardless of the thread that's used to call from java. |
| 39 explicit AndroidOverlayCallback( |
| 40 const AndroidOverlayProxy::Callback& callback); |
| 41 ~AndroidOverlayCallback(); |
| 42 |
| 43 // Callback that we should use to send the java surface when it arrives. |
| 44 using AndroidSurfaceCB = |
| 45 base::Callback<void(const base::android::JavaRef<jobject>& jsurface)>; |
| 46 |
| 47 // Sets the callback that we'll use to provide the surface to AndroidOverlay. |
| 48 void SetAndroidSurfaceCB(const AndroidSurfaceCB& cb); |
| 49 |
| 50 static scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner(); |
| 51 bool CalledOnValidThread() const; |
| 52 |
| 53 jobject obj() const { return j_surface_callback_.obj(); } |
| 54 |
| 55 // Called on the proper thread for the callback for |id|, though |id| might |
| 56 // no longer refer to a valid callback. |jsurface_opt| is an optional object |
| 57 // that goes with the callback. For OP_CREATED, it is the Android Surface. |
| 58 // |jcompletion_opt| is an optional IAndroidSurfaceCompletion that we'll |
| 59 // signal when done. |
| 60 static void OnCallbackProperThread( |
| 61 long id, |
| 62 AndroidOverlayProxy::CallbackOp what, |
| 63 base::android::ScopedJavaGlobalRef<jobject> jobject_opt, |
| 64 base::android::ScopedJavaGlobalRef<jobject> jcompletion_opt); |
| 65 |
| 66 static bool RegisterAndroidOverlayCallback(JNIEnv* env); |
| 67 |
| 68 private: |
| 69 // Java callback instance. |
| 70 base::android::ScopedJavaGlobalRef<jobject> j_surface_callback_; |
| 71 |
| 72 // |id_| must be non-repeating. We can't use |this| directly because of race |
| 73 // conditions with destruction and re-allocation. |
| 74 long id_; |
| 75 |
| 76 AndroidOverlayProxy::Callback callback_; |
| 77 |
| 78 base::ThreadChecker thread_checker_; |
| 79 |
| 80 AndroidSurfaceCB android_surface_cb_; |
| 81 |
| 82 // Task runner of the first callback that uses us. We'll use this for all |
| 83 // callbacks on all task runners. |
| 84 static scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| 85 |
| 86 DISALLOW_COPY_AND_ASSIGN(AndroidOverlayCallback); |
| 87 }; |
| 88 |
| 89 } // namespace media |
| 90 |
| 91 #endif // MEDIA_BASE_ANDROID_ANDROID_OVERLAY_CALLBACK_H_ |
OLD | NEW |