[Draft] RtpPacket sketched.

webrtc/modules/rtp_rtcp/source/rtp_packet_history.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  *
  *  Class for storing RTP packets.
  */
 
 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_HISTORY_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_HISTORY_H_
 
+#include <memory>
 #include <vector>
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class Clock;
+class RtpPacketToSend;
 
 static const size_t kMaxHistoryCapacity = 9600;
 
 class RTPPacketHistory {
  public:
   explicit RTPPacketHistory(Clock* clock);
   ~RTPPacketHistory();
 
-  void SetStorePacketsStatus(bool enable, uint16_t number_to_store);
-
+  void SetStoreSize(uint16_t number_to_store);
   bool StorePackets() const;
 
   // Stores RTP packet.
-  int32_t PutRTPPacket(const uint8_t* packet,
-                       size_t packet_length,
-                       int64_t capture_time_ms,
-                       StorageType type);
+  RtpPacketToSend* PutRtpPacket(std::unique_ptr<RtpPacketToSend>* packet,
+                                StorageType type);
 
   // Gets stored RTP packet corresponding to the input sequence number.
   // The packet is copied to the buffer pointed to by ptr_rtp_packet.
   // The rtp_packet_length should show the available buffer size.
   // Returns true if packet is found.
   // packet_length: returns the copied packet length on success.
   // min_elapsed_time_ms: the minimum time that must have elapsed since the last
   // time the packet was resent (parameter is ignored if set to zero).
   // If the packet is found but the minimum time has not elapsed, no bytes are
   // copied.
   // stored_time_ms: returns the time when the packet was stored.
-  bool GetPacketAndSetSendTime(uint16_t sequence_number,
-                               int64_t min_elapsed_time_ms,
-                               bool retransmit,
-                               uint8_t* packet,
-                               size_t* packet_length,
-                               int64_t* stored_time_ms);
+  RtpPacketToSend* GetPacket(uint16_t sequence_number,
+                             int64_t min_elapsed_time_ms,
+                             bool retransmit);
 
-  bool GetBestFittingPacket(uint8_t* packet, size_t* packet_length,
-                            int64_t* stored_time_ms);
+  RtpPacketToSend* GetBestFittingPacket(size_t packet_length);
 
   bool HasRTPPacket(uint16_t sequence_number) const;
 
-  bool SetSent(uint16_t sequence_number);
+ private:
+  struct StoredPacket {
+    std::unique_ptr<RtpPacketToSend> packet;
+    uint16_t sequence_number = 0;
+    StorageType storage_type = kDontRetransmit;
+    bool has_been_retransmitted = false;
+  };
 
- private:
-  void GetPacket(int index,
-                 uint8_t* packet,
-                 size_t* packet_length,
-                 int64_t* stored_time_ms) const
+  RtpPacketToSend* StorePacket(std::unique_ptr<RtpPacketToSend> packet,
+                               StorageType type)
       EXCLUSIVE_LOCKS_REQUIRED(critsect_);
   void Allocate(size_t number_to_store) EXCLUSIVE_LOCKS_REQUIRED(critsect_);
   void Free() EXCLUSIVE_LOCKS_REQUIRED(critsect_);
   void VerifyAndAllocatePacketLength(size_t packet_length, uint32_t start_index)
       EXCLUSIVE_LOCKS_REQUIRED(critsect_);
-  bool FindSeqNum(uint16_t sequence_number, int32_t* index) const
+  bool FindSeqNum(uint16_t sequence_number, size_t* index) const
       EXCLUSIVE_LOCKS_REQUIRED(critsect_);
   int FindBestFittingPacket(size_t size) const
       EXCLUSIVE_LOCKS_REQUIRED(critsect_);
 
- private:
   Clock* clock_;
   rtc::CriticalSection critsect_;
-  bool store_ GUARDED_BY(critsect_);
   uint32_t prev_index_ GUARDED_BY(critsect_);
 
-  struct StoredPacket {
-    StoredPacket();
-    uint16_t sequence_number = 0;
-    int64_t time_ms = 0;
-    int64_t send_time = 0;
-    StorageType storage_type = kDontRetransmit;
-    bool has_been_retransmitted = false;
-
-    uint8_t data[IP_PACKET_SIZE];
-    size_t length = 0;
-  };
   std::vector<StoredPacket> stored_packets_ GUARDED_BY(critsect_);
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_PACKET_HISTORY_H_