OEMCrypto Profiler

This CL is a merge from the widevine repo of:
http://go/wvgerrit/16491 Circular Buffer
http://go/wvgerrit/16512 Circular Buffer Tests
http://go/wvgerrit/16493 Entry Writer
http://go/wvgerrit/16495 Profiled Scope
http://go/wvgerrit/16500 Stats Collection
http://go/wvgerrit/16543 Disallow Stats Copy or Assign
http://go/wvgerrit/16514 Moving OEM Function Enum
http://go/wvgerrit/16501 Defining Session Interface
http://go/wvgerrit/16502 Session Definitions
http://go/wvgerrit/16573 Remove code to num bytes table
http://go/wvgerrit/16556 Connecting Profiler to Profiled Scope
http://go/wvgerrit/16557 Android Reading Profiler History
http://go/wvgerrit/16574 Adding Get Stats Method
http://go/wvgerrit/16606 Seperating Session Parsing
http://go/wvgerrit/16607 Adding get stats method to DRMPlugin
http://go/wvgerrit/16608 Fixing Linux Build Failure
http://go/wvgerrit/16612 Stop Clearing History
http://go/wvgerrit/16613 Accessing profiler information using session id
http://go/wvgerrit/16614 Making All Session Subsets of Global Session

BUG: 25123303
BUG: 26027857
Change-Id: Ie2422e644aa631871852ea0e461695aeb7060f88

libwvdrmengine/cdm/profiler/src/profiled_scope.cpp

@@ -0,0 +1,66 @@
+// Copyright 2016 Google Inc. All Rights Reserved
+
+#include "profiled_scope.h"
+
+#include <sys/time.h>
+
+#include "profiler_session.h"
+
+namespace wvcdm {
+namespace oemprofiler {
+
+ProfiledScope::ProfiledScope(OEM_FUNCTION fid) :
+    meta_data_(),
+    sid_(kGlobalSID),
+    fid_(fid),
+    start_time_(GetNowUS()) {
+
+}
+
+// Only allow a user provided sid to be a positive integer
+// to prevent a user provided sid from conflicting with the
+// global sid
+ProfiledScope::ProfiledScope(uint32_t sid, OEM_FUNCTION fid) :
+    meta_data_(),
+    sid_(static_cast<int64_t>(sid)),
+    fid_(fid),
+    start_time_(GetNowUS()) {
+
+}
+
+ProfiledScope::~ProfiledScope() {
+  const uint64_t end_time = GetNowUS();
+
+  if (sid_ != kGlobalSID) {
+    Submit(sid_, end_time);
+  }
+
+  // Always save a copy to the global session so that all other sessions
+  // are subsets of the global session
+  Submit(kGlobalSID, end_time);
+}
+
+void ProfiledScope::Submit(int64_t sid, uint64_t end_time) const {
+  ProfilerSession* const session = ProfilerSession::Find(sid);
+
+  if (session != NULL) {
+    session->Submit(
+        fid_,
+        start_time_,
+        end_time,
+        meta_data_.GetData(),
+        meta_data_.GetSize());
+  }
+}
+
+uint64_t ProfiledScope::GetNowUS() const {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+
+  const uint64_t kSecondsToUSeconds = 1000000;
+  return static_cast<uint64_t>(tv.tv_sec) * kSecondsToUSeconds +
+      static_cast<uint64_t>(tv.tv_usec);
+}
+
+} // namespace oemprofiler
+} // namespace wvcdm