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      1 // Copyright 2014 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 REMOTING_IOS_BRIDGE_FRAME_CONSUMER_BRIDGE_H_
      6 #define REMOTING_IOS_BRIDGE_FRAME_CONSUMER_BRIDGE_H_
      7 
      8 #include <list>
      9 
     10 #include "base/callback.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/memory/scoped_vector.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "remoting/client/frame_consumer.h"
     15 #include "remoting/client/frame_producer.h"
     16 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
     17 
     18 namespace remoting {
     19 
     20 class FrameConsumerBridge : public base::SupportsWeakPtr<FrameConsumerBridge>,
     21                             public FrameConsumer {
     22  public:
     23   typedef base::Callback<void(const webrtc::DesktopSize& view_size,
     24                               webrtc::DesktopFrame* buffer,
     25                               const webrtc::DesktopRegion& region)>
     26       OnFrameCallback;
     27 
     28   // A callback is provided to return frame updates asynchronously.
     29   explicit FrameConsumerBridge(OnFrameCallback callback);
     30 
     31   virtual ~FrameConsumerBridge();
     32   // This must be called before any other functional use.
     33   void Initialize(FrameProducer* producer);
     34 
     35   // FrameConsumer implementation.
     36   virtual void ApplyBuffer(const webrtc::DesktopSize& view_size,
     37                            const webrtc::DesktopRect& clip_area,
     38                            webrtc::DesktopFrame* buffer,
     39                            const webrtc::DesktopRegion& region,
     40                            const webrtc::DesktopRegion& shape) OVERRIDE;
     41   virtual void ReturnBuffer(webrtc::DesktopFrame* buffer) OVERRIDE;
     42   virtual void SetSourceSize(const webrtc::DesktopSize& source_size,
     43                              const webrtc::DesktopVector& dpi) OVERRIDE;
     44   virtual PixelFormat GetPixelFormat() OVERRIDE;
     45 
     46  private:
     47   // Allocates a new buffer of |view_size_|, and tells the producer to draw onto
     48   // it.  This can be called as soon as the producer is known, but is not
     49   // required until ready to receive frames.
     50   void DrawWithNewBuffer();
     51 
     52   OnFrameCallback callback_;
     53 
     54   FrameProducer* frame_producer_;
     55   webrtc::DesktopSize view_size_;
     56 
     57   // List of allocated image buffers.
     58   ScopedVector<webrtc::DesktopFrame> buffers_;
     59 
     60   DISALLOW_COPY_AND_ASSIGN(FrameConsumerBridge);
     61 };
     62 
     63 }  // namespace remoting
     64 
     65 #endif  // REMOTING_IOS_BRIDGE_FRAME_CONSUMER_BRIDGE_H_
     66