Preparation CL for WebRTC performance test using promise-based getStats

chrome/browser/media/webrtc/rtc_stats_dictionary.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_MEDIA_WEBRTC_RTC_STATS_DICTIONARY_H_
+#define CHROME_BROWSER_MEDIA_WEBRTC_RTC_STATS_DICTIONARY_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/values.h"
+
+namespace content {
+
+class RTCStatsDictionary;
+
+class RTCStatsReportDictionary
+    : public base::RefCounted<RTCStatsReportDictionary> {
+ public:
+  explicit RTCStatsReportDictionary(
+      std::unique_ptr<base::DictionaryValue> report);
+
+  std::unique_ptr<RTCStatsDictionary> Get(const std::string id);
+  std::vector<RTCStatsDictionary> Filter(
+      bool(*filter)(const RTCStatsDictionary& dictionary));
+
+ private:
+  friend class base::RefCounted<RTCStatsReportDictionary>;
+  ~RTCStatsReportDictionary();
+
+  std::unique_ptr<base::DictionaryValue> report_;
+};
+
+class RTCStatsDictionary {
+ public:
+  RTCStatsDictionary(RTCStatsReportDictionary* report,
+                     const base::DictionaryValue* stats);
+  RTCStatsDictionary(const RTCStatsDictionary& other);
+  ~RTCStatsDictionary();
+
+  bool IsBoolean(const std::string& key) const;
+  bool GetBoolean(const std::string& key) const;
+
+  bool IsNumber(const std::string& key) const;
+  double GetNumber(const std::string& key) const;
+
+  bool IsString(const std::string& key) const;
+  std::string GetString(const std::string& key) const;
+
+  bool IsSequenceBoolean(const std::string& key) const;
+  std::vector<bool> GetSequenceBoolean(const std::string& key) const;
+
+  bool IsSequenceNumber(const std::string& key) const;
+  std::vector<double> GetSequenceNumber(const std::string& key) const;
+
+  bool IsSequenceString(const std::string& key) const;
+  std::vector<std::string> GetSequenceString(const std::string& key) const;
+
+ private:
+  bool GetBoolean(const std::string& key, bool* out) const;
+  bool GetNumber(const std::string& key, double* out) const;
+  bool GetString(const std::string& key, std::string* out) const;
+  bool GetSequenceBoolean(
+      const std::string& key, std::vector<bool>* out) const;
+  bool GetSequenceNumber(
+      const std::string& key, std::vector<double>* out) const;
+  bool GetSequenceString(
+      const std::string& key, std::vector<std::string>* out) const;
+
+  // The reference keeps the report alive which indirectly owns |stats_|.
+  scoped_refptr<RTCStatsReportDictionary> report_;
+  const base::DictionaryValue* stats_;
+};
+
+}  // namespace content
+
+#endif  // CHROME_BROWSER_MEDIA_WEBRTC_RTC_STATS_DICTIONARY_H_