media/cast/net/rtp_sender/packet_storage/packet_storage.h

// Copyright 2013 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_CAST_NET_RTP_SENDER_PACKET_STORAGE_PACKET_STORAGE_H_
#define MEDIA_CAST_NET_RTP_SENDER_PACKET_STORAGE_PACKET_STORAGE_H_

#include <list>
#include <map>
#include <vector>

#include "base/basictypes.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "media/cast/cast_config.h"

namespace media {
namespace cast {

class StoredPacket;
typedef std::map<uint32, linked_ptr<StoredPacket> > PacketMap;
typedef std::multimap<base::TimeTicks, uint32> TimeToPacketMap;

class PacketStorage {
 public:
  static const int kMaxStoredPackets = 1000;

  PacketStorage(base::TickClock* clock, int max_time_stored_ms);
  virtual ~PacketStorage();

  void StorePacket(uint32 frame_id, uint16 packet_id, const Packet* packet);

  // Copies all missing packets into the packet list.
  PacketList GetPackets(
      const MissingFramesAndPacketsMap& missing_frames_and_packets);

  // Copies packet into the packet list.
  bool GetPacket(uint8 frame_id, uint16 packet_id, PacketList* packets);

 private:
  void CleanupOldPackets(base::TimeTicks now);

  base::TickClock* const clock_;  // Not owned by this class.
  base::TimeDelta max_time_stored_;
  PacketMap stored_packets_;
  TimeToPacketMap time_to_packet_map_;
  std::list<linked_ptr<StoredPacket> > free_packets_;
};

}  // namespace cast
}  // namespace media

#endif  // MEDIA_CAST_NET_RTP_SENDER_PACKET_STORAGE_PACKET_STORAGE_H_