third_party/libjingle/overrides/init_webrtc.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "init_webrtc.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/files/file_path.h"
   9 #include "base/files/file_util.h"
  10 #include "base/logging.h"
  11 #include "base/metrics/field_trial.h"
  12 #include "base/metrics/histogram.h"
  13 #include "base/native_library.h"
  14 #include "base/path_service.h"
  15 #include "base/trace_event/trace_event.h"
  16 #include "third_party/webrtc/overrides/webrtc/base/basictypes.h"
  17 #include "third_party/webrtc/overrides/webrtc/base/logging.h"
  18 #include "third_party/webrtc/system_wrappers/interface/cpu_info.h"
  19 #include "third_party/webrtc/system_wrappers/interface/event_tracer.h"
  20
  21 const unsigned char* GetCategoryGroupEnabled(const char* category_group) {
  22   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group);
  23 }
  24
  25 void AddTraceEvent(char phase,
  26                    const unsigned char* category_group_enabled,
  27                    const char* name,
  28                    unsigned long long id,
  29                    int num_args,
  30                    const char** arg_names,
  31                    const unsigned char* arg_types,
  32                    const unsigned long long* arg_values,
  33                    unsigned char flags) {
  34   TRACE_EVENT_API_ADD_TRACE_EVENT(phase, category_group_enabled, name, id,
  35                                   num_args, arg_names, arg_types, arg_values,
  36                                   NULL, flags);
  37 }
  38
  39 namespace webrtc {
  40 // Define webrtc::field_trial::FindFullName to provide webrtc with a field trial
  41 // implementation.
  42 namespace field_trial {
  43 std::string FindFullName(const std::string& trial_name) {
  44   return base::FieldTrialList::FindFullName(trial_name);
  45 }
  46 }  // namespace field_trial
  47
  48 // Define webrtc::metrics functions to provide webrtc with implementations.
  49 namespace metrics {
  50
  51 // This class doesn't actually exist, so don't go looking for it :)
  52 // This type is just fwd declared here in order to use it as an opaque type
  53 // between the Histogram functions in this file.
  54 class Histogram;
  55
  56 Histogram* HistogramFactoryGetCounts(
  57     const std::string& name, int min, int max, int bucket_count) {
  58   return reinterpret_cast<Histogram*>(
  59       base::Histogram::FactoryGet(name, min, max, bucket_count,
  60           base::HistogramBase::kUmaTargetedHistogramFlag));
  61 }
  62
  63 Histogram* HistogramFactoryGetEnumeration(
  64     const std::string& name, int boundary) {
  65   return reinterpret_cast<Histogram*>(
  66       base::LinearHistogram::FactoryGet(name, 1, boundary, boundary + 1,
  67           base::HistogramBase::kUmaTargetedHistogramFlag));
  68 }
  69
  70 void HistogramAdd(
  71     Histogram* histogram_pointer, const std::string& name, int sample) {
  72   base::HistogramBase* ptr =
  73       reinterpret_cast<base::HistogramBase*>(histogram_pointer);
  74   // The name should not vary.
  75   DCHECK(ptr->histogram_name() == name);
  76   ptr->Add(sample);
  77 }
  78 }  // namespace metrics
  79 }  // namespace webrtc
  80
  81 bool InitializeWebRtcModule() {
  82   // Workaround for crbug.com/176522
  83   // On Linux, we can't fetch the number of cores after the sandbox has been
  84   // initialized, so we call DetectNumberOfCores() here, to cache the value.
  85   webrtc::CpuInfo::DetectNumberOfCores();
  86   webrtc::SetupEventTracer(&GetCategoryGroupEnabled, &AddTraceEvent);
  87   return true;
  88 }