1/*
2 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_
12#define WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_
13
14#include <set>
15
16#include "webrtc/base/random.h"
17#include "webrtc/base/scoped_ptr.h"
18#include "webrtc/system_wrappers/include/static_instance.h"
19#include "webrtc/typedefs.h"
20
21namespace webrtc {
22class CriticalSectionWrapper;
23
24class SSRCDatabase {
25 public:
26  static SSRCDatabase* GetSSRCDatabase();
27  static void ReturnSSRCDatabase();
28
29  uint32_t CreateSSRC();
30  void RegisterSSRC(uint32_t ssrc);
31  void ReturnSSRC(uint32_t ssrc);
32
33 protected:
34  SSRCDatabase();
35  virtual ~SSRCDatabase();
36
37  static SSRCDatabase* CreateInstance() { return new SSRCDatabase(); }
38
39 private:
40  // Friend function to allow the SSRC destructor to be accessed from the
41  // template class.
42  friend SSRCDatabase* GetStaticInstance<SSRCDatabase>(
43      CountOperation count_operation);
44
45  rtc::scoped_ptr<CriticalSectionWrapper> crit_;
46  Random random_ GUARDED_BY(crit_);
47  std::set<uint32_t> ssrcs_ GUARDED_BY(crit_);
48};
49}  // namespace webrtc
50
51#endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_
52