ui/gl/android/surface_texture_listener.h

// Copyright (c) 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.

#ifndef UI_GL_ANDROID_SURFACE_TEXTURE_LISTENER_H_
#define UI_GL_ANDROID_SURFACE_TEXTURE_LISTENER_H_

#include <jni.h>

#include "base/android/scoped_java_ref.h"
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/sequenced_task_runner_helpers.h"
#include "ui/gl/gl_export.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace gl {

// Listener class for all the callbacks from android SurfaceTexture.
class GL_EXPORT SurfaceTextureListener {
 public:
  // Destroy this listener.
  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);

  // A new frame is available to consume.
  void FrameAvailable(JNIEnv* env,
                      const base::android::JavaParamRef<jobject>& obj);

 private:
  friend class base::DeleteHelper<SurfaceTextureListener>;

  // Native code should not hold any reference to this object, and instead pass
  // it up to Java for being referenced by a SurfaceTexture instance.
  // If use_any_thread is true, then the FrameAvailable callback will happen
  // on whatever thread calls us.  Otherwise, we will call it back on the same
  // thread that was used to construct us.
  SurfaceTextureListener(const base::Closure& callback, bool use_any_thread);
  ~SurfaceTextureListener();

  friend class SurfaceTexture;

  base::Closure callback_;

  scoped_refptr<base::SingleThreadTaskRunner> browser_loop_;

  bool use_any_thread_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(SurfaceTextureListener);
};

}  // namespace gl

#endif  // UI_GL_ANDROID_SURFACE_TEXTURE_LISTENER_H_