offset_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 PACKAGER_MEDIA_BASE_OFFSET_BYTE_QUEUE_H_
#define PACKAGER_MEDIA_BASE_OFFSET_BYTE_QUEUE_H_
 
#include <stdint.h>
 
#include "packager/media/base/byte_queue.h"
 
namespace shaka {
namespace media {
 
class OffsetByteQueue {
 public:
  OffsetByteQueue();
  ~OffsetByteQueue();
 
  void Reset();
  void Push(const uint8_t* buf, int size);
  void Peek(const uint8_t** buf, int* size);
  void Pop(int count);
 
  void PeekAt(int64_t offset, const uint8_t** buf, int* size);
 
  bool Trim(int64_t max_offset);
 
  int64_t head() { return head_; }
  int64_t tail() { return head_ + size_; }
 
 private:
  // Synchronize |buf_| and |size_| with |queue_|.
  void Sync();
 
  ByteQueue queue_;
  const uint8_t* buf_;
  int size_;
  int64_t head_;
 
  DISALLOW_COPY_AND_ASSIGN(OffsetByteQueue);
};
 
}  // namespace media
}  // namespace shaka
 
#endif  // PACKAGER_MEDIA_BASE_OFFSET_BYTE_QUEUE_H_