byte_queue.h

// Copyright (c) 2012 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 MEDIA_BASE_BYTE_QUEUE_H_
#define MEDIA_BASE_BYTE_QUEUE_H_

#include <stdint.h>

#include "packager/base/memory/scoped_ptr.h"

namespace edash_packager {
namespace media {

class ByteQueue {
 public:
  ByteQueue();
  ~ByteQueue();

  void Reset();

  void Push(const uint8_t* data, int size);

  void Peek(const uint8_t** data, int* size) const;

  void Pop(int count);

 private:
  // Returns a pointer to the front of the queue.
  uint8_t* front() const;

  scoped_ptr<uint8_t[]> buffer_;

  // Size of |buffer_|.
  size_t size_;

  // Offset from the start of |buffer_| that marks the front of the queue.
  size_t offset_;

  // Number of bytes stored in the queue.
  int used_;

  DISALLOW_COPY_AND_ASSIGN(ByteQueue);
};

}  // namespace media
}  // namespace edash_packager

#endif  // MEDIA_BASE_BYTE_QUEUE_H_