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Diffstat (limited to 'third_party/libwebrtc/api/stats/rtc_stats.h')
| -rw-r--r-- | third_party/libwebrtc/api/stats/rtc_stats.h | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/stats/rtc_stats.h b/third_party/libwebrtc/api/stats/rtc_stats.h new file mode 100644 index 0000000000..72775243c7 --- /dev/null +++ b/third_party/libwebrtc/api/stats/rtc_stats.h @@ -0,0 +1,580 @@ +/* + * Copyright 2016 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. + */ + +#ifndef API_STATS_RTC_STATS_H_ +#define API_STATS_RTC_STATS_H_ + +#include <stddef.h> +#include <stdint.h> + +#include <map> +#include <memory> +#include <string> +#include <utility> +#include <vector> + +#include "absl/types/optional.h" +#include "api/units/timestamp.h" +#include "rtc_base/checks.h" +#include "rtc_base/system/rtc_export.h" +#include "rtc_base/system/rtc_export_template.h" + +namespace webrtc { + +class RTCStatsMemberInterface; + +// Abstract base class for RTCStats-derived dictionaries, see +// https://w3c.github.io/webrtc-stats/. +// +// All derived classes must have the following static variable defined: +// static const char kType[]; +// It is used as a unique class identifier and a string representation of the +// class type, see https://w3c.github.io/webrtc-stats/#rtcstatstype-str*. +// Use the `WEBRTC_RTCSTATS_IMPL` macro when implementing subclasses, see macro +// for details. +// +// Derived classes list their dictionary members, RTCStatsMember<T>, as public +// fields, allowing the following: +// +// RTCFooStats foo("fooId", Timestamp::Micros(GetCurrentTime())); +// foo.bar = 42; +// foo.baz = std::vector<std::string>(); +// foo.baz->push_back("hello world"); +// uint32_t x = *foo.bar; +// +// Pointers to all the members are available with `Members`, allowing iteration: +// +// for (const RTCStatsMemberInterface* member : foo.Members()) { +// printf("%s = %s\n", member->name(), member->ValueToString().c_str()); +// } +class RTC_EXPORT RTCStats { + public: + RTCStats(const std::string& id, Timestamp timestamp) + : id_(id), timestamp_(timestamp) {} + ABSL_DEPRECATED("Use constructor with Timestamp instead") + RTCStats(std::string id, int64_t timestamp_us) + : RTCStats(std::move(id), Timestamp::Micros(timestamp_us)) {} + + virtual ~RTCStats() {} + + virtual std::unique_ptr<RTCStats> copy() const = 0; + + const std::string& id() const { return id_; } + // Time relative to the UNIX epoch (Jan 1, 1970, UTC), in microseconds. + ABSL_DEPRECATED("Use .timestamp().us() instead") + int64_t timestamp_us() const { return timestamp_.us(); } + Timestamp timestamp() const { return timestamp_; } + + // Returns the static member variable `kType` of the implementing class. + virtual const char* type() const = 0; + // Returns a vector of pointers to all the `RTCStatsMemberInterface` members + // of this class. This allows for iteration of members. For a given class, + // `Members` always returns the same members in the same order. + std::vector<const RTCStatsMemberInterface*> Members() const; + // Checks if the two stats objects are of the same type and have the same + // member values. Timestamps are not compared. These operators are exposed for + // testing. + bool operator==(const RTCStats& other) const; + bool operator!=(const RTCStats& other) const; + + // Creates a JSON readable string representation of the stats + // object, listing all of its members (names and values). + std::string ToJson() const; + + // Downcasts the stats object to an `RTCStats` subclass `T`. DCHECKs that the + // object is of type `T`. + template <typename T> + const T& cast_to() const { + RTC_DCHECK_EQ(type(), T::kType); + return static_cast<const T&>(*this); + } + + protected: + // Gets a vector of all members of this `RTCStats` object, including members + // derived from parent classes. `additional_capacity` is how many more members + // shall be reserved in the vector (so that subclasses can allocate a vector + // with room for both parent and child members without it having to resize). + virtual std::vector<const RTCStatsMemberInterface*> + MembersOfThisObjectAndAncestors(size_t additional_capacity) const; + + std::string const id_; + Timestamp timestamp_; +}; + +// All `RTCStats` classes should use these macros. +// `WEBRTC_RTCSTATS_DECL` is placed in a public section of the class definition. +// `WEBRTC_RTCSTATS_IMPL` is placed outside the class definition (in a .cc). +// +// These macros declare (in _DECL) and define (in _IMPL) the static `kType` and +// overrides methods as required by subclasses of `RTCStats`: `copy`, `type` and +// `MembersOfThisObjectAndAncestors`. The |...| argument is a list of addresses +// to each member defined in the implementing class. The list must have at least +// one member. +// +// (Since class names need to be known to implement these methods this cannot be +// part of the base `RTCStats`. While these methods could be implemented using +// templates, that would only work for immediate subclasses. Subclasses of +// subclasses also have to override these methods, resulting in boilerplate +// code. Using a macro avoids this and works for any `RTCStats` class, including +// grandchildren.) +// +// Sample usage: +// +// rtcfoostats.h: +// class RTCFooStats : public RTCStats { +// public: +// WEBRTC_RTCSTATS_DECL(); +// +// RTCFooStats(const std::string& id, int64_t timestamp_us); +// +// RTCStatsMember<int32_t> foo; +// RTCStatsMember<int32_t> bar; +// }; +// +// rtcfoostats.cc: +// WEBRTC_RTCSTATS_IMPL(RTCFooStats, RTCStats, "foo-stats" +// &foo, +// &bar); +// +// RTCFooStats::RTCFooStats(const std::string& id, int64_t timestamp_us) +// : RTCStats(id, timestamp_us), +// foo("foo"), +// bar("bar") { +// } +// +#define WEBRTC_RTCSTATS_DECL() \ + protected: \ + std::vector<const webrtc::RTCStatsMemberInterface*> \ + MembersOfThisObjectAndAncestors(size_t local_var_additional_capacity) \ + const override; \ + \ + public: \ + static const char kType[]; \ + \ + std::unique_ptr<webrtc::RTCStats> copy() const override; \ + const char* type() const override + +#define WEBRTC_RTCSTATS_IMPL(this_class, parent_class, type_str, ...) \ + const char this_class::kType[] = type_str; \ + \ + std::unique_ptr<webrtc::RTCStats> this_class::copy() const { \ + return std::make_unique<this_class>(*this); \ + } \ + \ + const char* this_class::type() const { return this_class::kType; } \ + \ + std::vector<const webrtc::RTCStatsMemberInterface*> \ + this_class::MembersOfThisObjectAndAncestors( \ + size_t local_var_additional_capacity) const { \ + const webrtc::RTCStatsMemberInterface* local_var_members[] = { \ + __VA_ARGS__}; \ + size_t local_var_members_count = \ + sizeof(local_var_members) / sizeof(local_var_members[0]); \ + std::vector<const webrtc::RTCStatsMemberInterface*> \ + local_var_members_vec = parent_class::MembersOfThisObjectAndAncestors( \ + local_var_members_count + local_var_additional_capacity); \ + RTC_DCHECK_GE( \ + local_var_members_vec.capacity() - local_var_members_vec.size(), \ + local_var_members_count + local_var_additional_capacity); \ + local_var_members_vec.insert(local_var_members_vec.end(), \ + &local_var_members[0], \ + &local_var_members[local_var_members_count]); \ + return local_var_members_vec; \ + } + +// A version of WEBRTC_RTCSTATS_IMPL() where "..." is omitted, used to avoid a +// compile error on windows. This is used if the stats dictionary does not +// declare any members of its own (but perhaps its parent dictionary does). +#define WEBRTC_RTCSTATS_IMPL_NO_MEMBERS(this_class, parent_class, type_str) \ + const char this_class::kType[] = type_str; \ + \ + std::unique_ptr<webrtc::RTCStats> this_class::copy() const { \ + return std::make_unique<this_class>(*this); \ + } \ + \ + const char* this_class::type() const { return this_class::kType; } \ + \ + std::vector<const webrtc::RTCStatsMemberInterface*> \ + this_class::MembersOfThisObjectAndAncestors( \ + size_t local_var_additional_capacity) const { \ + return parent_class::MembersOfThisObjectAndAncestors(0); \ + } + +// Non-standard stats members can be exposed to the JavaScript API in Chrome +// e.g. through origin trials. The group ID can be used by the blink layer to +// determine if a stats member should be exposed or not. Multiple non-standard +// stats members can share the same group ID so that they are exposed together. +enum class NonStandardGroupId { + // Group ID used for testing purposes only. + kGroupIdForTesting, + // I2E: + // https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/hE2B1iItPDk + kRtcAudioJitterBufferMaxPackets, + // I2E: + // https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/YbhMyqLXXXo + kRtcStatsRelativePacketArrivalDelay, +}; + +// Certain stat members should only be exposed to the JavaScript API in +// certain circumstances as to avoid passive fingerprinting. +enum class StatExposureCriteria : uint8_t { + // The stat should always be exposed. This is the default. + kAlways, + // The stat exposes hardware capabilities and thus should has limited exposure + // to JavaScript. The requirements for exposure are written in the spec at + // https://w3c.github.io/webrtc-stats/#limiting-exposure-of-hardware-capabilities. + kHardwareCapability, + // The stat is non-standard so user agents should filter these. + kNonStandard, +}; + +// Interface for `RTCStats` members, which have a name and a value of a type +// defined in a subclass. Only the types listed in `Type` are supported, these +// are implemented by `RTCStatsMember<T>`. The value of a member may be +// undefined, the value can only be read if `is_defined`. +class RTCStatsMemberInterface { + public: + // Member value types. + enum Type { + kBool, // bool + kInt32, // int32_t + kUint32, // uint32_t + kInt64, // int64_t + kUint64, // uint64_t + kDouble, // double + kString, // std::string + + kSequenceBool, // std::vector<bool> + kSequenceInt32, // std::vector<int32_t> + kSequenceUint32, // std::vector<uint32_t> + kSequenceInt64, // std::vector<int64_t> + kSequenceUint64, // std::vector<uint64_t> + kSequenceDouble, // std::vector<double> + kSequenceString, // std::vector<std::string> + + kMapStringUint64, // std::map<std::string, uint64_t> + kMapStringDouble, // std::map<std::string, double> + }; + + virtual ~RTCStatsMemberInterface() {} + + const char* name() const { return name_; } + virtual Type type() const = 0; + virtual bool is_sequence() const = 0; + virtual bool is_string() const = 0; + virtual bool is_defined() const = 0; + // Is this part of the stats spec? Used so that chromium can easily filter + // out anything unstandardized. + bool is_standardized() const { + return exposure_criteria() != StatExposureCriteria::kNonStandard; + } + // Non-standard stats members can have group IDs in order to be exposed in + // JavaScript through experiments. Standardized stats have no group IDs. + virtual std::vector<NonStandardGroupId> group_ids() const { return {}; } + // The conditions for exposing the statistic to JavaScript. Stats with + // criteria that is not kAlways has some restriction and should be filtered + // in accordance to the spec. + virtual StatExposureCriteria exposure_criteria() const { + return StatExposureCriteria::kAlways; + } + // Type and value comparator. The names are not compared. These operators are + // exposed for testing. + bool operator==(const RTCStatsMemberInterface& other) const { + return IsEqual(other); + } + bool operator!=(const RTCStatsMemberInterface& other) const { + return !(*this == other); + } + virtual std::string ValueToString() const = 0; + // This is the same as ValueToString except for kInt64 and kUint64 types, + // where the value is represented as a double instead of as an integer. + // Since JSON stores numbers as floating point numbers, very large integers + // cannot be accurately represented, so we prefer to display them as doubles + // instead. + virtual std::string ValueToJson() const = 0; + + template <typename T> + const T& cast_to() const { + RTC_DCHECK_EQ(type(), T::StaticType()); + return static_cast<const T&>(*this); + } + + protected: + explicit RTCStatsMemberInterface(const char* name) : name_(name) {} + + virtual bool IsEqual(const RTCStatsMemberInterface& other) const = 0; + + const char* const name_; +}; + +// Template implementation of `RTCStatsMemberInterface`. +// The supported types are the ones described by +// `RTCStatsMemberInterface::Type`. +template <typename T> +class RTCStatsMember : public RTCStatsMemberInterface { + public: + explicit RTCStatsMember(const char* name) + : RTCStatsMemberInterface(name), value_() {} + RTCStatsMember(const char* name, const T& value) + : RTCStatsMemberInterface(name), value_(value) {} + RTCStatsMember(const char* name, T&& value) + : RTCStatsMemberInterface(name), value_(std::move(value)) {} + explicit RTCStatsMember(const RTCStatsMember<T>& other) + : RTCStatsMemberInterface(other.name_), value_(other.value_) {} + explicit RTCStatsMember(RTCStatsMember<T>&& other) + : RTCStatsMemberInterface(other.name_), value_(std::move(other.value_)) {} + + static Type StaticType(); + Type type() const override { return StaticType(); } + bool is_sequence() const override; + bool is_string() const override; + bool is_defined() const override { return value_.has_value(); } + std::string ValueToString() const override; + std::string ValueToJson() const override; + + template <typename U> + inline T ValueOrDefault(U default_value) const { + return value_.value_or(default_value); + } + + // Assignment operators. + T& operator=(const T& value) { + value_ = value; + return value_.value(); + } + T& operator=(const T&& value) { + value_ = std::move(value); + return value_.value(); + } + + // Value getters. + T& operator*() { + RTC_DCHECK(value_); + return *value_; + } + const T& operator*() const { + RTC_DCHECK(value_); + return *value_; + } + + // Value getters, arrow operator. + T* operator->() { + RTC_DCHECK(value_); + return &(*value_); + } + const T* operator->() const { + RTC_DCHECK(value_); + return &(*value_); + } + + protected: + bool IsEqual(const RTCStatsMemberInterface& other) const override { + if (type() != other.type() || + is_standardized() != other.is_standardized() || + exposure_criteria() != other.exposure_criteria()) + return false; + const RTCStatsMember<T>& other_t = + static_cast<const RTCStatsMember<T>&>(other); + return value_ == other_t.value_; + } + + private: + absl::optional<T> value_; +}; + +namespace rtc_stats_internal { + +typedef std::map<std::string, uint64_t> MapStringUint64; +typedef std::map<std::string, double> MapStringDouble; + +} // namespace rtc_stats_internal + +#define WEBRTC_DECLARE_RTCSTATSMEMBER(T) \ + template <> \ + RTC_EXPORT RTCStatsMemberInterface::Type RTCStatsMember<T>::StaticType(); \ + template <> \ + RTC_EXPORT bool RTCStatsMember<T>::is_sequence() const; \ + template <> \ + RTC_EXPORT bool RTCStatsMember<T>::is_string() const; \ + template <> \ + RTC_EXPORT std::string RTCStatsMember<T>::ValueToString() const; \ + template <> \ + RTC_EXPORT std::string RTCStatsMember<T>::ValueToJson() const; \ + extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) \ + RTCStatsMember<T> + +WEBRTC_DECLARE_RTCSTATSMEMBER(bool); +WEBRTC_DECLARE_RTCSTATSMEMBER(int32_t); +WEBRTC_DECLARE_RTCSTATSMEMBER(uint32_t); +WEBRTC_DECLARE_RTCSTATSMEMBER(int64_t); +WEBRTC_DECLARE_RTCSTATSMEMBER(uint64_t); +WEBRTC_DECLARE_RTCSTATSMEMBER(double); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::string); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<bool>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<int32_t>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<uint32_t>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<int64_t>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<uint64_t>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<double>); +WEBRTC_DECLARE_RTCSTATSMEMBER(std::vector<std::string>); +WEBRTC_DECLARE_RTCSTATSMEMBER(rtc_stats_internal::MapStringUint64); +WEBRTC_DECLARE_RTCSTATSMEMBER(rtc_stats_internal::MapStringDouble); + +// For stats with restricted exposure. +template <typename T, StatExposureCriteria E> +class RTCRestrictedStatsMember : public RTCStatsMember<T> { + public: + explicit RTCRestrictedStatsMember(const char* name) + : RTCStatsMember<T>(name) {} + RTCRestrictedStatsMember(const char* name, const T& value) + : RTCStatsMember<T>(name, value) {} + RTCRestrictedStatsMember(const char* name, T&& value) + : RTCStatsMember<T>(name, std::move(value)) {} + RTCRestrictedStatsMember(const RTCRestrictedStatsMember<T, E>& other) + : RTCStatsMember<T>(other) {} + RTCRestrictedStatsMember(RTCRestrictedStatsMember<T, E>&& other) + : RTCStatsMember<T>(std::move(other)) {} + + StatExposureCriteria exposure_criteria() const override { return E; } + + T& operator=(const T& value) { return RTCStatsMember<T>::operator=(value); } + T& operator=(const T&& value) { + return RTCStatsMember<T>::operator=(std::move(value)); + } + + private: + static_assert(E != StatExposureCriteria::kAlways, + "kAlways is the default exposure criteria. Use " + "RTCStatMember<T> instead."); +}; + +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<bool, StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<int32_t, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<uint32_t, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<int64_t, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<uint64_t, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<double, StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::string, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<bool>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<int32_t>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<uint32_t>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<int64_t>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<uint64_t>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<double>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::vector<std::string>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::map<std::string, uint64_t>, + StatExposureCriteria::kHardwareCapability>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCRestrictedStatsMember<std::map<std::string, double>, + StatExposureCriteria::kHardwareCapability>; + +// Using inheritance just so that it's obvious from the member's declaration +// whether it's standardized or not. +template <typename T> +class RTCNonStandardStatsMember + : public RTCRestrictedStatsMember<T, StatExposureCriteria::kNonStandard> { + public: + explicit RTCNonStandardStatsMember(const char* name) + : RTCRestrictedStatsBase(name) {} + RTCNonStandardStatsMember(const char* name, + std::initializer_list<NonStandardGroupId> group_ids) + : RTCRestrictedStatsBase(name), group_ids_(group_ids) {} + RTCNonStandardStatsMember(const char* name, const T& value) + : RTCRestrictedStatsBase(name, value) {} + RTCNonStandardStatsMember(const char* name, T&& value) + : RTCRestrictedStatsBase(name, std::move(value)) {} + RTCNonStandardStatsMember(const RTCNonStandardStatsMember<T>& other) + : RTCRestrictedStatsBase(other), group_ids_(other.group_ids_) {} + RTCNonStandardStatsMember(RTCNonStandardStatsMember<T>&& other) + : RTCRestrictedStatsBase(std::move(other)), + group_ids_(std::move(other.group_ids_)) {} + + std::vector<NonStandardGroupId> group_ids() const override { + return group_ids_; + } + + T& operator=(const T& value) { + return RTCRestrictedStatsMember< + T, StatExposureCriteria::kNonStandard>::operator=(value); + } + T& operator=(const T&& value) { + return RTCRestrictedStatsMember< + T, StatExposureCriteria::kNonStandard>::operator=(std::move(value)); + } + + private: + using RTCRestrictedStatsBase = + RTCRestrictedStatsMember<T, StatExposureCriteria::kNonStandard>; + std::vector<NonStandardGroupId> group_ids_; +}; + +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<bool>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<int32_t>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<uint32_t>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<int64_t>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<uint64_t>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<double>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::string>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<bool>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<int32_t>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<uint32_t>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<int64_t>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<uint64_t>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<double>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::vector<std::string>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::map<std::string, uint64_t>>; +extern template class RTC_EXPORT_TEMPLATE_DECLARE(RTC_EXPORT) + RTCNonStandardStatsMember<std::map<std::string, double>>; + +} // namespace webrtc + +#endif // API_STATS_RTC_STATS_H_ |