remoting/client/jni/jni_frame_consumer.h

   1 // Copyright 2013 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_CLIENT_JNI_JNI_FRAME_CONSUMER_H_
   6 #define REMOTING_CLIENT_JNI_JNI_FRAME_CONSUMER_H_
   7
   8 #include "remoting/client/frame_consumer.h"
   9
  10 #include "base/compiler_specific.h"
  11
  12 namespace webrtc {
  13 class DesktopFrame;
  14 }  // namespace webrtc
  15
  16 namespace remoting {
  17 class ChromotingJniRuntime;
  18 class FrameProducer;
  19
  20 // FrameConsumer implementation that draws onto a JNI direct byte buffer.
  21 class JniFrameConsumer : public FrameConsumer {
  22  public:
  23   // The instance does not take ownership of |jni_runtime|.
  24   explicit JniFrameConsumer(ChromotingJniRuntime* jni_runtime);
  25
  26   virtual ~JniFrameConsumer();
  27
  28   // This must be called once before the producer's source size is set.
  29   void set_frame_producer(FrameProducer* producer);
  30
  31   // FrameConsumer implementation.
  32   virtual void ApplyBuffer(const SkISize& view_size,
  33                            const SkIRect& clip_area,
  34                            webrtc::DesktopFrame* buffer,
  35                            const SkRegion& region) OVERRIDE;
  36   virtual void ReturnBuffer(webrtc::DesktopFrame* buffer) OVERRIDE;
  37   virtual void SetSourceSize(const SkISize& source_size,
  38                              const SkIPoint& dpi) OVERRIDE;
  39
  40  private:
  41   // Variables are to be used from the display thread.
  42
  43   // Used to obtain task runner references and make calls to Java methods.
  44   ChromotingJniRuntime* jni_runtime_;
  45
  46   // Whether we're currently in the constructor, and should deallocate the
  47   // buffer instead of passing it back to the producer.
  48   bool in_dtor_;
  49
  50   FrameProducer* frame_producer_;
  51   SkISize view_size_;
  52   SkIRect clip_area_;
  53
  54   // If |provide_buffer_|, allocates a new buffer of |view_size_|, informs
  55   // Java about it, and tells the producer to draw onto it. Otherwise, no-op.
  56   void AllocateBuffer();
  57
  58   DISALLOW_COPY_AND_ASSIGN(JniFrameConsumer);
  59 };
  60
  61 }  // namespace remoting
  62
  63 #endif