Reland of Delete class SSRCDatabase, and its global ssrc registry.

webrtc/modules/rtp_rtcp/source/ssrc_database.cc

Index: webrtc/modules/rtp_rtcp/source/ssrc_database.cc
diff --git a/webrtc/modules/rtp_rtcp/source/ssrc_database.cc b/webrtc/modules/rtp_rtcp/source/ssrc_database.cc
deleted file mode 100644
index a96d05db468f0309740b8dca2cdc617ffd310daf..0000000000000000000000000000000000000000
--- a/webrtc/modules/rtp_rtcp/source/ssrc_database.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- *  Copyright (c) 2011 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.
- */
-
-#include "webrtc/modules/rtp_rtcp/source/ssrc_database.h"
-#include "webrtc/base/timeutils.h"
-#include "webrtc/base/checks.h"
-
-namespace webrtc {
-
-SSRCDatabase* SSRCDatabase::GetSSRCDatabase() {
-  return GetStaticInstance<SSRCDatabase>(kAddRef);
-}
-
-void SSRCDatabase::ReturnSSRCDatabase() {
-  GetStaticInstance<SSRCDatabase>(kRelease);
-}
-
-uint32_t SSRCDatabase::CreateSSRC() {
-  rtc::CritScope lock(&crit_);
-
-  while (true) {  // Try until get a new ssrc.
-    // 0 and 0xffffffff are invalid values for SSRC.
-    uint32_t ssrc = random_.Rand(1u, 0xfffffffe);
-    if (ssrcs_.insert(ssrc).second) {
-      return ssrc;
-    }
-  }
-}
-
-void SSRCDatabase::RegisterSSRC(uint32_t ssrc) {
-  rtc::CritScope lock(&crit_);
-  ssrcs_.insert(ssrc);
-}
-
-void SSRCDatabase::ReturnSSRC(uint32_t ssrc) {
-  rtc::CritScope lock(&crit_);
-  ssrcs_.erase(ssrc);
-}
-
-SSRCDatabase::SSRCDatabase() : random_(rtc::TimeMicros()) {}
-
-SSRCDatabase::~SSRCDatabase() {}
-
-}  // namespace webrtc