Copy the (early prototype of) remoting in Chrome into the public tree....

remoting/client/plugin/compression.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_CLIENT_PLUGIN_COMPRESSION_H_
+#define REMOTING_CLIENT_PLUGIN_COMPRESSION_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+
+#if defined(USE_SYSTEM_ZLIB)
+#include <zlib.h>
+#else
+#include "third_party/zlib/zlib.h"
+#endif
+
+namespace remoting {
+
+class Compressor {
+ public:
+  Compressor() {}
+  virtual ~Compressor() {}
+
+  virtual void Write(char* buffer, int size) = 0;
+  virtual void Flush() = 0;
+  virtual int GetCompressedSize() = 0;
+  virtual char* GetCompressedData() = 0;
+  virtual int GetRawSize() = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(Compressor);
+};
+
+class Decompressor {
+ public:
+  Decompressor() {}
+  virtual ~Decompressor() {}
+
+  virtual void Write(char* buffer, int size) = 0;
+  virtual void Flush() = 0;
+  virtual char* GetRawData() = 0;
+  virtual int GetRawSize() = 0;
+  virtual int GetCompressedSize() = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(Decompressor);
+};
+
+class ZCompressor : public Compressor {
+ public:
+  ZCompressor();
+  virtual ~ZCompressor() {}
+
+  virtual void Write(char* buffer, int size);
+  virtual void Flush();
+  virtual int GetCompressedSize();
+  virtual char* GetCompressedData();
+  virtual int GetRawSize();
+
+ private:
+  void WriteInternal(char* buffer, int size, int flush);
+
+  std::vector<char> buffer_;
+  z_stream stream_;
+
+  DISALLOW_COPY_AND_ASSIGN(ZCompressor);
+};
+
+class ZDecompressor : public Decompressor {
+ public:
+  ZDecompressor();
+  virtual ~ZDecompressor() {}
+
+  virtual void Write(char* buffer, int size);
+  virtual void Flush();
+  virtual char* GetRawData();
+  virtual int GetRawSize();
+  virtual int GetCompressedSize();
+
+ private:
+  void WriteInternal(char* buffer, int size, int flush);
+
+  std::vector<char> buffer_;
+  z_stream stream_;
+
+  DISALLOW_COPY_AND_ASSIGN(ZDecompressor);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_PLUGIN_COMPRESSION_H_