Simplify FrameConsumer interface. Remove FrameProducer interface.

remoting/client/jni/jni_frame_consumer.h

 // 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.
 
 #ifndef REMOTING_CLIENT_JNI_JNI_FRAME_CONSUMER_H_
 #define REMOTING_CLIENT_JNI_JNI_FRAME_CONSUMER_H_
 
 #include <list>
 
-#include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "remoting/client/frame_consumer.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 
-namespace gfx {
-class JavaBitmap;
-}  // namespace gfx
+namespace remoting {
 
-namespace webrtc {
-class DesktopFrame;
-}  // namespace webrtc
-
-namespace remoting {
-class ChromotingJniInstance;
 class ChromotingJniRuntime;
-class FrameProducer;
 
 // FrameConsumer implementation that draws onto a JNI direct byte buffer.
 class JniFrameConsumer : public FrameConsumer {
  public:
-  // The instance does not take ownership of |jni_runtime|.
-  explicit JniFrameConsumer(ChromotingJniRuntime* jni_runtime,
-                            scoped_refptr<ChromotingJniInstance> jni_instance);
+  // Does not take ownership of |jni_runtime|.
+  explicit JniFrameConsumer(ChromotingJniRuntime* jni_runtime);
 
   ~JniFrameConsumer() override;
 
-  // This must be called once before the producer's source size is set.
-  void set_frame_producer(FrameProducer* producer);
-
   // FrameConsumer implementation.
-  void ApplyBuffer(const webrtc::DesktopSize& view_size,
-                   const webrtc::DesktopRect& clip_area,
-                   webrtc::DesktopFrame* buffer,
-                   const webrtc::DesktopRegion& region,
-                   const webrtc::DesktopRegion* shape) override;
-  void ReturnBuffer(webrtc::DesktopFrame* buffer) override;
-  void SetSourceSize(const webrtc::DesktopSize& source_size,
-                     const webrtc::DesktopVector& dpi) override;
+  scoped_ptr<webrtc::DesktopFrame> AllocateFrame(
+      const webrtc::DesktopSize& size) override;
+  void DrawFrame(scoped_ptr<webrtc::DesktopFrame> frame,
+                 const base::Closure& done) override;
   PixelFormat GetPixelFormat() override;
 
  private:
-  // Allocates a new buffer of |source_size|, informs Java about it, and tells
-  // the producer to draw onto it.
-  void AllocateBuffer(const webrtc::DesktopSize& source_size);
+  class Renderer;
 
-  // Frees a frame buffer previously allocated by AllocateBuffer.
-  void FreeBuffer(webrtc::DesktopFrame* buffer);
-
-  // Variables are to be used from the display thread.
+  void OnFrameRendered(const base::Closure& done);
 
   // Used to obtain task runner references and make calls to Java methods.
   ChromotingJniRuntime* jni_runtime_;
 
-  // Used to record statistics.
-  scoped_refptr<ChromotingJniInstance> jni_instance_;
+  // Renderer object used to render the frames on the display thread.
+  scoped_ptr<Renderer> renderer_;
 
-  FrameProducer* frame_producer_;
-  webrtc::DesktopRect clip_area_;
-
-  // List of allocated image buffers.
-  std::list<webrtc::DesktopFrame*> buffers_;
-
-  // This global reference is required, instead of a local reference, so it
-  // remains valid for the lifetime of |bitmap_| - gfx::JavaBitmap does not
-  // create its own global reference internally. And this global ref must be
-  // destroyed (released) after |bitmap_| is destroyed.
-  base::android::ScopedJavaGlobalRef<jobject> bitmap_global_ref_;
-
-  // Reference to the frame bitmap that is passed to Java when the frame is
-  // allocated. This provides easy access to the underlying pixels.
-  scoped_ptr<gfx::JavaBitmap> bitmap_;
+  base::WeakPtrFactory<JniFrameConsumer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(JniFrameConsumer);
 };
 
 }  // namespace remoting
 
 #endif