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| 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/criticalsection.h" |
| 17 #include "webrtc/base/random.h" |
| 18 #include "webrtc/base/thread_annotations.h" |
| 19 #include "webrtc/system_wrappers/include/static_instance.h" |
| 20 #include "webrtc/typedefs.h" |
| 21 |
| 22 namespace webrtc { |
| 23 |
| 24 // TODO(tommi, holmer): Look into whether we can eliminate locking in this |
| 25 // class or the class itself completely once voice engine doesn't rely on it. |
| 26 // At the moment voe_auto_test requires locking, but it's not clear if that's |
| 27 // an issue with the test code or if it reflects real world usage or if that's |
| 28 // the best design performance wise. |
| 29 // If we do decide to keep the class, we should at least get rid of using |
| 30 // StaticInstance. |
| 31 class SSRCDatabase { |
| 32 public: |
| 33 static SSRCDatabase* GetSSRCDatabase(); |
| 34 static void ReturnSSRCDatabase(); |
| 35 |
| 36 uint32_t CreateSSRC(); |
| 37 void RegisterSSRC(uint32_t ssrc); |
| 38 void ReturnSSRC(uint32_t ssrc); |
| 39 |
| 40 protected: |
| 41 SSRCDatabase(); |
| 42 ~SSRCDatabase(); |
| 43 |
| 44 static SSRCDatabase* CreateInstance() { return new SSRCDatabase(); } |
| 45 |
| 46 // Friend function to allow the SSRC destructor to be accessed from the |
| 47 // template class. |
| 48 friend SSRCDatabase* GetStaticInstance<SSRCDatabase>( |
| 49 CountOperation count_operation); |
| 50 |
| 51 private: |
| 52 rtc::CriticalSection crit_; |
| 53 Random random_ GUARDED_BY(crit_); |
| 54 std::set<uint32_t> ssrcs_ GUARDED_BY(crit_); |
| 55 // TODO(tommi): Use a thread checker to ensure the object is created and |
| 56 // deleted on the same thread. At the moment this isn't possible due to |
| 57 // voe::ChannelOwner in voice engine. To reproduce, run: |
| 58 // voe_auto_test --automated --gtest_filter=*MixManyChannelsForStressOpus |
| 59 }; |
| 60 } // namespace webrtc |
| 61 |
| 62 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_ |
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