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-/*
- * libjingle
- * Copyright 2004--2006, Google Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef TALK_APP_STREAMUTILS_H__
-#define TALK_APP_STREAMUTILS_H__
-
-#include "talk/base/sigslot.h"
-#include "talk/base/stream.h"
-
-///////////////////////////////////////////////////////////////////////////////
-// StreamRelay - acts as an intermediary between two asynchronous streams,
-// reading from one stream and writing to the other, using a pre-specified
-// amount of buffering in both directions.
-///////////////////////////////////////////////////////////////////////////////
-
-class StreamRelay : public sigslot::has_slots<> {
-public:
- StreamRelay(talk_base::StreamInterface* s1,
- talk_base::StreamInterface* s2, size_t buffer_size);
- virtual ~StreamRelay();
-
- void Circulate(); // Simulate events to get things flowing
- void Close();
-
- sigslot::signal2<StreamRelay*, int> SignalClosed;
-
-private:
- inline int Index(talk_base::StreamInterface* s) const
- { return (s == dir_[1].stream); }
- inline int Complement(int index) const { return (1-index); }
-
- bool Flow(int read_index, int* error);
- void OnEvent(talk_base::StreamInterface* stream, int events, int error);
-
- struct Direction {
- talk_base::StreamInterface* stream;
- char* buffer;
- size_t data_len;
- };
- Direction dir_[2];
- size_t buffer_size_;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// StreamCounter - counts the number of bytes which are transferred in either
-// direction.
-///////////////////////////////////////////////////////////////////////////////
-
-class StreamCounter : public talk_base::StreamAdapterInterface {
- public:
- explicit StreamCounter(talk_base::StreamInterface* stream);
-
- inline void ResetByteCount() { count_ = 0; }
- inline size_t GetByteCount() const { return count_; }
-
- sigslot::signal1<size_t> SignalUpdateByteCount;
-
- // StreamAdapterInterface
- virtual talk_base::StreamResult Read(void* buffer, size_t buffer_len,
- size_t* read, int* error);
- virtual talk_base::StreamResult Write(const void* data, size_t data_len,
- size_t* written, int* error);
-
- private:
- size_t count_;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-#endif // TALK_APP_STREAMUTILS_H__