EncoderZlib/DecoderZlib for chromoting

remoting/base/decoder_zlib.h

+// Copyright (c) 2010 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_BASE_DECODER_ZLIB_H_
+#define REMOTING_BASE_DECODER_ZLIB_H_
+
+#include "remoting/base/decoder.h"
+
+namespace remoting {
+
+class DecompressorZlib;
+
+class DecoderZlib : public Decoder {
+ public:
+  DecoderZlib();
+
+  // Decoder implementations.
+  virtual bool BeginDecode(scoped_refptr<media::VideoFrame> frame,
+                           UpdatedRects* update_rects,
+                           Task* partial_decode_done,
+                           Task* decode_done);
+  virtual bool PartialDecode(HostMessage* message);
+  virtual void EndDecode();
+
+ private:
+  bool HandleBeginRect(HostMessage* message);
+  bool HandleRectData(HostMessage* message);
+  bool HandleEndRect(HostMessage* message);
+
+  // The internal state of the decoder.
+  State state_;
+
+  // Keeps track of the updating rect.
+  int rect_x_;
+  int rect_y_;
+  int rect_width_;
+  int rect_height_;
+  int bytes_per_pixel_;
+
+  // Tasks to call when decode is done.
+  scoped_ptr<Task> partial_decode_done_;
+  scoped_ptr<Task> decode_done_;
+
+  // The video frame to write to.
+  scoped_refptr<media::VideoFrame> frame_;
+  UpdatedRects* updated_rects_;
+
+  // A zlib decompressor used throughout one update sequence.
+  scoped_ptr<DecompressorZlib> decompressor_;
+
+  // The position in the row that we are updating.
+  int row_pos_;
+
+  // The row number in the rect that we are updaing.
+  int row_y_;
+
+  DISALLOW_COPY_AND_ASSIGN(DecoderZlib);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_BASE_DECODER_ZLIB_H_