Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 780 insertions, 0 deletions

diff --git a/third_party/libwebrtc/rtc_base/logging.h b/third_party/libwebrtc/rtc_base/logging.h
new file mode 100644
index 0000000000..a3733d7543
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/logging.h
@@ -0,0 +1,780 @@
+/*
+ *  Copyright 2004 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.
+ */
+
+// RTC_LOG(...) an ostream target that can be used to send formatted
+// output to a variety of logging targets, such as debugger console, stderr,
+// or any LogSink.
+// The severity level passed as the first argument to the logging
+// functions is used as a filter, to limit the verbosity of the logging.
+// Static members of LogMessage documented below are used to control the
+// verbosity and target of the output.
+// There are several variations on the RTC_LOG macro which facilitate logging
+// of common error conditions, detailed below.
+
+// RTC_LOG(sev) logs the given stream at severity "sev", which must be a
+//     compile-time constant of the LoggingSeverity type, without the namespace
+//     prefix.
+// RTC_LOG_IF(sev, condition) logs the given stream at severitye "sev" if
+//     "condition" is true.
+// RTC_LOG_V(sev) Like RTC_LOG(), but sev is a run-time variable of the
+//     LoggingSeverity type (basically, it just doesn't prepend the namespace).
+// RTC_LOG_F(sev) Like RTC_LOG(), but includes the name of the current function.
+// RTC_LOG_IF_F(sev, condition), Like RTC_LOG_IF(), but includes the name of
+//     the current function.
+// RTC_LOG_T(sev) Like RTC_LOG(), but includes the this pointer.
+// RTC_LOG_T_F(sev) Like RTC_LOG_F(), but includes the this pointer.
+// RTC_LOG_GLE(sev [, mod]) attempt to add a string description of the
+//     HRESULT returned by GetLastError.
+// RTC_LOG_ERRNO(sev) attempts to add a string description of an errno-derived
+//     error. errno and associated facilities exist on both Windows and POSIX,
+//     but on Windows they only apply to the C/C++ runtime.
+// RTC_LOG_ERR(sev) is an alias for the platform's normal error system, i.e.
+//     _GLE on Windows and _ERRNO on POSIX.
+// (The above three also all have _EX versions that let you specify the error
+// code, rather than using the last one.)
+// RTC_LOG_E(sev, ctx, err, ...) logs a detailed error interpreted using the
+//     specified context.
+// RTC_LOG_CHECK_LEVEL(sev) (and RTC_LOG_CHECK_LEVEL_V(sev)) can be used as a
+//     test before performing expensive or sensitive operations whose sole
+//     purpose is to output logging data at the desired level.
+
+#ifndef RTC_BASE_LOGGING_H_
+#define RTC_BASE_LOGGING_H_
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wvarargs"
+
+#if defined(__clang__)
+#  pragma clang diagnostic push
+#  pragma clang diagnostic ignored "-Wclass-varargs"
+#endif
+
+#include <errno.h>
+
+#include <atomic>
+#include <sstream>  // no-presubmit-check TODO(webrtc:8982)
+#include <string>
+#include <type_traits>
+#include <utility>
+
+#include "absl/base/attributes.h"
+#include "absl/meta/type_traits.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "api/units/timestamp.h"
+#include "rtc_base/platform_thread_types.h"
+#include "rtc_base/strings/string_builder.h"
+#include "rtc_base/system/inline.h"
+
+#if !defined(NDEBUG) || defined(DLOG_ALWAYS_ON)
+#define RTC_DLOG_IS_ON 1
+#else
+#define RTC_DLOG_IS_ON 0
+#endif
+
+#if defined(RTC_DISABLE_LOGGING)
+#define RTC_LOG_ENABLED() 0
+#else
+#define RTC_LOG_ENABLED() 1
+#endif
+
+namespace rtc {
+
+//////////////////////////////////////////////////////////////////////
+// The meanings of the levels are:
+//  LS_VERBOSE: This level is for data which we do not want to appear in the
+//   normal debug log, but should appear in diagnostic logs.
+//  LS_INFO: Chatty level used in debugging for all sorts of things, the default
+//   in debug builds.
+//  LS_WARNING: Something that may warrant investigation.
+//  LS_ERROR: Something that should not have occurred.
+//  LS_NONE: Don't log.
+enum LoggingSeverity {
+  LS_VERBOSE,
+  LS_INFO,
+  LS_WARNING,
+  LS_ERROR,
+  LS_NONE,
+};
+
+// LogErrorContext assists in interpreting the meaning of an error value.
+enum LogErrorContext {
+  ERRCTX_NONE,
+  ERRCTX_ERRNO,    // System-local errno
+  ERRCTX_HRESULT,  // Windows HRESULT
+
+  // Abbreviations for LOG_E macro
+  ERRCTX_EN = ERRCTX_ERRNO,    // LOG_E(sev, EN, x)
+  ERRCTX_HR = ERRCTX_HRESULT,  // LOG_E(sev, HR, x)
+};
+
+class LogMessage;
+
+// LogLineRef encapsulates all the information required to generate a log line.
+// It is used both internally to LogMessage but also as a parameter to
+// LogSink::OnLogMessage, allowing custom LogSinks to format the log in
+// the most flexible way.
+class LogLineRef {
+ public:
+  absl::string_view message() const { return message_; }
+  absl::string_view filename() const { return filename_; }
+  int line() const { return line_; }
+  absl::optional<PlatformThreadId> thread_id() const { return thread_id_; }
+  webrtc::Timestamp timestamp() const { return timestamp_; }
+  absl::string_view tag() const { return tag_; }
+  LoggingSeverity severity() const { return severity_; }
+
+#if RTC_LOG_ENABLED()
+  std::string DefaultLogLine() const;
+#else
+  std::string DefaultLogLine() const { return ""; }
+#endif
+
+ private:
+  friend class LogMessage;
+  void set_message(std::string message) { message_ = std::move(message); }
+  void set_filename(absl::string_view filename) { filename_ = filename; }
+  void set_line(int line) { line_ = line; }
+  void set_thread_id(absl::optional<PlatformThreadId> thread_id) {
+    thread_id_ = thread_id;
+  }
+  void set_timestamp(webrtc::Timestamp timestamp) { timestamp_ = timestamp; }
+  void set_tag(absl::string_view tag) { tag_ = tag; }
+  void set_severity(LoggingSeverity severity) { severity_ = severity; }
+
+  std::string message_;
+  absl::string_view filename_;
+  int line_ = 0;
+  absl::optional<PlatformThreadId> thread_id_;
+  webrtc::Timestamp timestamp_ = webrtc::Timestamp::MinusInfinity();
+  // The default Android debug output tag.
+  absl::string_view tag_ = "libjingle";
+  // The severity level of this message
+  LoggingSeverity severity_;
+};
+
+// Virtual sink interface that can receive log messages.
+class LogSink {
+ public:
+  LogSink() {}
+  virtual ~LogSink() {}
+  virtual void OnLogMessage(const std::string& msg,
+                            LoggingSeverity severity,
+                            const char* tag);
+  virtual void OnLogMessage(const std::string& message,
+                            LoggingSeverity severity);
+  virtual void OnLogMessage(const std::string& message) = 0;
+
+  virtual void OnLogMessage(absl::string_view msg,
+                            LoggingSeverity severity,
+                            const char* tag);
+  virtual void OnLogMessage(absl::string_view message,
+                            LoggingSeverity severity);
+  virtual void OnLogMessage(absl::string_view message);
+  virtual void OnLogMessage(const LogLineRef& line);
+
+ private:
+  friend class ::rtc::LogMessage;
+#if RTC_LOG_ENABLED()
+  // Members for LogMessage class to keep linked list of the registered sinks.
+  LogSink* next_ = nullptr;
+  LoggingSeverity min_severity_;
+#endif
+};
+
+namespace webrtc_logging_impl {
+
+class LogMetadata {
+ public:
+  LogMetadata(const char* file, int line, LoggingSeverity severity)
+      : file_(file),
+        line_and_sev_(static_cast<uint32_t>(line) << 3 | severity) {}
+  LogMetadata() = default;
+
+  const char* File() const { return file_; }
+  int Line() const { return line_and_sev_ >> 3; }
+  LoggingSeverity Severity() const {
+    return static_cast<LoggingSeverity>(line_and_sev_ & 0x7);
+  }
+
+ private:
+  const char* file_;
+
+  // Line number and severity, the former in the most significant 29 bits, the
+  // latter in the least significant 3 bits. (This is an optimization; since
+  // both numbers are usually compile-time constants, this way we can load them
+  // both with a single instruction.)
+  uint32_t line_and_sev_;
+};
+static_assert(std::is_trivial<LogMetadata>::value, "");
+
+struct LogMetadataErr {
+  LogMetadata meta;
+  LogErrorContext err_ctx;
+  int err;
+};
+
+#ifdef WEBRTC_ANDROID
+struct LogMetadataTag {
+  LoggingSeverity severity;
+  const char* tag;
+};
+#endif
+
+enum class LogArgType : int8_t {
+  kEnd = 0,
+  kInt,
+  kLong,
+  kLongLong,
+  kUInt,
+  kULong,
+  kULongLong,
+  kDouble,
+  kLongDouble,
+  kCharP,
+  kStdString,
+  kStringView,
+  kVoidP,
+  kLogMetadata,
+  kLogMetadataErr,
+#ifdef WEBRTC_ANDROID
+  kLogMetadataTag,
+#endif
+};
+
+// Wrapper for log arguments. Only ever make values of this type with the
+// MakeVal() functions.
+template <LogArgType N, typename T>
+struct Val {
+  static constexpr LogArgType Type() { return N; }
+  T GetVal() const { return val; }
+  T val;
+};
+
+// Case for when we need to construct a temp string and then print that.
+// (We can't use Val<CheckArgType::kStdString, const std::string*>
+// because we need somewhere to store the temp string.)
+struct ToStringVal {
+  static constexpr LogArgType Type() { return LogArgType::kStdString; }
+  const std::string* GetVal() const { return &val; }
+  std::string val;
+};
+
+inline Val<LogArgType::kInt, int> MakeVal(int x) {
+  return {x};
+}
+inline Val<LogArgType::kLong, long> MakeVal(long x) {
+  return {x};
+}
+inline Val<LogArgType::kLongLong, long long> MakeVal(long long x) {
+  return {x};
+}
+inline Val<LogArgType::kUInt, unsigned int> MakeVal(unsigned int x) {
+  return {x};
+}
+inline Val<LogArgType::kULong, unsigned long> MakeVal(unsigned long x) {
+  return {x};
+}
+inline Val<LogArgType::kULongLong, unsigned long long> MakeVal(
+    unsigned long long x) {
+  return {x};
+}
+
+inline Val<LogArgType::kDouble, double> MakeVal(double x) {
+  return {x};
+}
+inline Val<LogArgType::kLongDouble, long double> MakeVal(long double x) {
+  return {x};
+}
+
+inline Val<LogArgType::kCharP, const char*> MakeVal(const char* x) {
+  return {x};
+}
+inline Val<LogArgType::kStdString, const std::string*> MakeVal(
+    const std::string& x) {
+  return {&x};
+}
+inline Val<LogArgType::kStringView, const absl::string_view*> MakeVal(
+    const absl::string_view& x) {
+  return {&x};
+}
+
+inline Val<LogArgType::kVoidP, const void*> MakeVal(const void* x) {
+  return {x};
+}
+
+inline Val<LogArgType::kLogMetadata, LogMetadata> MakeVal(
+    const LogMetadata& x) {
+  return {x};
+}
+inline Val<LogArgType::kLogMetadataErr, LogMetadataErr> MakeVal(
+    const LogMetadataErr& x) {
+  return {x};
+}
+
+// The enum class types are not implicitly convertible to arithmetic types.
+template <typename T,
+          absl::enable_if_t<std::is_enum<T>::value &&
+                            !std::is_arithmetic<T>::value>* = nullptr>
+inline decltype(MakeVal(std::declval<absl::underlying_type_t<T>>())) MakeVal(
+    T x) {
+  return {static_cast<absl::underlying_type_t<T>>(x)};
+}
+
+#ifdef WEBRTC_ANDROID
+inline Val<LogArgType::kLogMetadataTag, LogMetadataTag> MakeVal(
+    const LogMetadataTag& x) {
+  return {x};
+}
+#endif
+
+template <typename T, class = void>
+struct has_to_log_string : std::false_type {};
+template <typename T>
+struct has_to_log_string<T,
+                         absl::enable_if_t<std::is_convertible<
+                             decltype(ToLogString(std::declval<T>())),
+                             std::string>::value>> : std::true_type {};
+
+template <typename T, absl::enable_if_t<has_to_log_string<T>::value>* = nullptr>
+ToStringVal MakeVal(const T& x) {
+  return {ToLogString(x)};
+}
+
+// Handle arbitrary types other than the above by falling back to stringstream.
+// TODO(bugs.webrtc.org/9278): Get rid of this overload when callers don't need
+// it anymore. No in-tree caller does, but some external callers still do.
+template <
+    typename T,
+    typename T1 = absl::decay_t<T>,
+    absl::enable_if_t<std::is_class<T1>::value &&
+                      !std::is_same<T1, std::string>::value &&
+                      !std::is_same<T1, LogMetadata>::value &&
+                      !has_to_log_string<T1>::value &&
+#ifdef WEBRTC_ANDROID
+                      !std::is_same<T1, LogMetadataTag>::value &&
+#endif
+                      !std::is_same<T1, LogMetadataErr>::value>* = nullptr>
+ToStringVal MakeVal(const T& x) {
+  std::ostringstream os;  // no-presubmit-check TODO(webrtc:8982)
+  os << x;
+  return {os.str()};
+}
+
+#if RTC_LOG_ENABLED()
+void Log(const LogArgType* fmt, ...);
+#else
+inline void Log(const LogArgType* fmt, ...) {
+  // Do nothing, shouldn't be invoked
+}
+#endif
+
+// Ephemeral type that represents the result of the logging << operator.
+template <typename... Ts>
+class LogStreamer;
+
+// Base case: Before the first << argument.
+template <>
+class LogStreamer<> final {
+ public:
+  template <typename U,
+            typename V = decltype(MakeVal(std::declval<U>())),
+            absl::enable_if_t<std::is_arithmetic<U>::value ||
+                              std::is_enum<U>::value>* = nullptr>
+  RTC_FORCE_INLINE LogStreamer<V> operator<<(U arg) const {
+    return LogStreamer<V>(MakeVal(arg), this);
+  }
+
+  template <typename U,
+            typename V = decltype(MakeVal(std::declval<U>())),
+            absl::enable_if_t<!std::is_arithmetic<U>::value &&
+                              !std::is_enum<U>::value>* = nullptr>
+  RTC_FORCE_INLINE LogStreamer<V> operator<<(const U& arg) const {
+    return LogStreamer<V>(MakeVal(arg), this);
+  }
+
+  template <typename... Us>
+  RTC_FORCE_INLINE static void Call(const Us&... args) {
+    static constexpr LogArgType t[] = {Us::Type()..., LogArgType::kEnd};
+    Log(t, args.GetVal()...);
+  }
+};
+
+// Inductive case: We've already seen at least one << argument. The most recent
+// one had type `T`, and the earlier ones had types `Ts`.
+template <typename T, typename... Ts>
+class LogStreamer<T, Ts...> final {
+ public:
+  RTC_FORCE_INLINE LogStreamer(T arg, const LogStreamer<Ts...>* prior)
+      : arg_(arg), prior_(prior) {}
+
+  template <typename U,
+            typename V = decltype(MakeVal(std::declval<U>())),
+            absl::enable_if_t<std::is_arithmetic<U>::value ||
+                              std::is_enum<U>::value>* = nullptr>
+  RTC_FORCE_INLINE LogStreamer<V, T, Ts...> operator<<(U arg) const {
+    return LogStreamer<V, T, Ts...>(MakeVal(arg), this);
+  }
+
+  template <typename U,
+            typename V = decltype(MakeVal(std::declval<U>())),
+            absl::enable_if_t<!std::is_arithmetic<U>::value &&
+                              !std::is_enum<U>::value>* = nullptr>
+  RTC_FORCE_INLINE LogStreamer<V, T, Ts...> operator<<(const U& arg) const {
+    return LogStreamer<V, T, Ts...>(MakeVal(arg), this);
+  }
+
+  template <typename... Us>
+  RTC_FORCE_INLINE void Call(const Us&... args) const {
+    prior_->Call(arg_, args...);
+  }
+
+ private:
+  // The most recent argument.
+  T arg_;
+
+  // Earlier arguments.
+  const LogStreamer<Ts...>* prior_;
+};
+
+class LogCall final {
+ public:
+  // This can be any binary operator with precedence lower than <<.
+  // We return bool here to be able properly remove logging if
+  // RTC_DISABLE_LOGGING is defined.
+  template <typename... Ts>
+  RTC_FORCE_INLINE bool operator&(const LogStreamer<Ts...>& streamer) {
+    streamer.Call();
+    return true;
+  }
+};
+
+// This class is used to explicitly ignore values in the conditional
+// logging macros.  This avoids compiler warnings like "value computed
+// is not used" and "statement has no effect".
+class LogMessageVoidify {
+ public:
+  LogMessageVoidify() = default;
+  // This has to be an operator with a precedence lower than << but
+  // higher than ?:
+  template <typename... Ts>
+  void operator&(LogStreamer<Ts...>&& streamer) {}
+};
+
+}  // namespace webrtc_logging_impl
+
+// Direct use of this class is deprecated; please use the logging macros
+// instead.
+// TODO(bugs.webrtc.org/9278): Move this class to an unnamed namespace in the
+// .cc file.
+class LogMessage {
+ public:
+  // Same as the above, but using a compile-time constant for the logging
+  // severity. This saves space at the call site, since passing an empty struct
+  // is generally the same as not passing an argument at all.
+  template <LoggingSeverity S>
+  RTC_NO_INLINE LogMessage(const char* file,
+                           int line,
+                           std::integral_constant<LoggingSeverity, S>)
+      : LogMessage(file, line, S) {}
+
+#if RTC_LOG_ENABLED()
+  LogMessage(const char* file, int line, LoggingSeverity sev);
+  LogMessage(const char* file,
+             int line,
+             LoggingSeverity sev,
+             LogErrorContext err_ctx,
+             int err);
+#if defined(WEBRTC_ANDROID)
+  LogMessage(const char* file, int line, LoggingSeverity sev, const char* tag);
+#endif
+  ~LogMessage();
+
+  LogMessage(const LogMessage&) = delete;
+  LogMessage& operator=(const LogMessage&) = delete;
+
+  void AddTag(const char* tag);
+  rtc::StringBuilder& stream();
+  // Returns the time at which this function was called for the first time.
+  // The time will be used as the logging start time.
+  // If this is not called externally, the LogMessage ctor also calls it, in
+  // which case the logging start time will be the time of the first LogMessage
+  // instance is created.
+  static int64_t LogStartTime();
+  // Returns the wall clock equivalent of `LogStartTime`, in seconds from the
+  // epoch.
+  static uint32_t WallClockStartTime();
+  //  LogThreads: Display the thread identifier of the current thread
+  static void LogThreads(bool on = true);
+  //  LogTimestamps: Display the elapsed time of the program
+  static void LogTimestamps(bool on = true);
+  // These are the available logging channels
+  //  Debug: Debug console on Windows, otherwise stderr
+  static void LogToDebug(LoggingSeverity min_sev);
+  static LoggingSeverity GetLogToDebug();
+  // Sets whether logs will be directed to stderr in debug mode.
+  static void SetLogToStderr(bool log_to_stderr);
+  // Stream: Any non-blocking stream interface.
+  // Installs the `stream` to collect logs with severtiy `min_sev` or higher.
+  // `stream` must live until deinstalled by RemoveLogToStream.
+  // If `stream` is the first stream added to the system, we might miss some
+  // early concurrent log statement happening from another thread happening near
+  // this instant.
+  static void AddLogToStream(LogSink* stream, LoggingSeverity min_sev);
+  // Removes the specified stream, without destroying it. When the method
+  // has completed, it's guaranteed that `stream` will receive no more logging
+  // calls.
+  static void RemoveLogToStream(LogSink* stream);
+  // Returns the severity for the specified stream, of if none is specified,
+  // the minimum stream severity.
+  static int GetLogToStream(LogSink* stream = nullptr);
+  // Testing against MinLogSeverity allows code to avoid potentially expensive
+  // logging operations by pre-checking the logging level.
+  static int GetMinLogSeverity();
+  // Parses the provided parameter stream to configure the options above.
+  // Useful for configuring logging from the command line.
+  static void ConfigureLogging(absl::string_view params);
+  // Checks the current global debug severity and if the `streams_` collection
+  // is empty. If `severity` is smaller than the global severity and if the
+  // `streams_` collection is empty, the LogMessage will be considered a noop
+  // LogMessage.
+  static bool IsNoop(LoggingSeverity severity);
+  // Version of IsNoop that uses fewer instructions at the call site, since the
+  // caller doesn't have to pass an argument.
+  template <LoggingSeverity S>
+  RTC_NO_INLINE static bool IsNoop() {
+    return IsNoop(S);
+  }
+#else
+  // Next methods do nothing; no one will call these functions.
+  LogMessage(const char* file, int line, LoggingSeverity sev) {}
+  LogMessage(const char* file,
+             int line,
+             LoggingSeverity sev,
+             LogErrorContext err_ctx,
+             int err) {}
+#if defined(WEBRTC_ANDROID)
+  LogMessage(const char* file, int line, LoggingSeverity sev, const char* tag) {
+  }
+#endif
+  ~LogMessage() = default;
+
+  inline void AddTag(const char* tag) {}
+  inline rtc::StringBuilder& stream() { return print_stream_; }
+  inline static int64_t LogStartTime() { return 0; }
+  inline static uint32_t WallClockStartTime() { return 0; }
+  inline static void LogThreads(bool on = true) {}
+  inline static void LogTimestamps(bool on = true) {}
+  inline static void LogToDebug(LoggingSeverity min_sev) {}
+  inline static LoggingSeverity GetLogToDebug() {
+    return LoggingSeverity::LS_INFO;
+  }
+  inline static void SetLogToStderr(bool log_to_stderr) {}
+  inline static void AddLogToStream(LogSink* stream, LoggingSeverity min_sev) {}
+  inline static void RemoveLogToStream(LogSink* stream) {}
+  inline static int GetLogToStream(LogSink* stream = nullptr) { return 0; }
+  inline static int GetMinLogSeverity() { return 0; }
+  inline static void ConfigureLogging(absl::string_view params) {}
+  static constexpr bool IsNoop(LoggingSeverity severity) { return true; }
+  template <LoggingSeverity S>
+  static constexpr bool IsNoop() {
+    return IsNoop(S);
+  }
+#endif  // RTC_LOG_ENABLED()
+
+  // Enable dumping of AEC inputs and outputs.  Can be changed in mid-call
+  static void set_aec_debug(bool enable);
+  static bool aec_debug() { return aec_debug_; }
+  static std::string aec_debug_filename();
+  static void set_aec_debug_filename(const char* filename);
+
+ private:
+  friend class LogMessageForTesting;
+
+#if RTC_LOG_ENABLED()
+  // Updates min_sev_ appropriately when debug sinks change.
+  static void UpdateMinLogSeverity();
+
+  // This writes out the actual log messages.
+  static void OutputToDebug(const LogLineRef& log_line_ref);
+
+  // Called from the dtor (or from a test) to append optional extra error
+  // information to the log stream and a newline character.
+  void FinishPrintStream();
+
+  LogLineRef log_line_;
+
+  // String data generated in the constructor, that should be appended to
+  // the message before output.
+  std::string extra_;
+
+  // The output streams and their associated severities
+  static LogSink* streams_;
+
+  // Holds true with high probability if `streams_` is empty, false with high
+  // probability otherwise. Operated on with std::memory_order_relaxed because
+  // it's ok to lose or log some additional statements near the instant streams
+  // are added/removed.
+  static std::atomic<bool> streams_empty_;
+
+  // Flags for formatting options and their potential values.
+  static bool log_thread_;
+  static bool log_timestamp_;
+
+  // Determines if logs will be directed to stderr in debug mode.
+  static bool log_to_stderr_;
+#else  // RTC_LOG_ENABLED()
+  // Next methods do nothing; no one will call these functions.
+  inline static void UpdateMinLogSeverity() {}
+#if defined(WEBRTC_ANDROID)
+  inline static void OutputToDebug(absl::string_view filename,
+                                   int line,
+                                   absl::string_view msg,
+                                   LoggingSeverity severity,
+                                   const char* tag) {}
+#else
+  inline static void OutputToDebug(absl::string_view filename,
+                                   int line,
+                                   absl::string_view msg,
+                                   LoggingSeverity severity) {}
+#endif  // defined(WEBRTC_ANDROID)
+  inline void FinishPrintStream() {}
+#endif  // RTC_LOG_ENABLED()
+
+  // The stringbuilder that buffers the formatted message before output
+  rtc::StringBuilder print_stream_;
+
+  static bool aec_debug_;
+  static std::string aec_filename_base_;
+};
+
+//////////////////////////////////////////////////////////////////////
+// Logging Helpers
+//////////////////////////////////////////////////////////////////////
+
+#define RTC_LOG_FILE_LINE(sev, file, line)        \
+  ::rtc::webrtc_logging_impl::LogCall() &         \
+      ::rtc::webrtc_logging_impl::LogStreamer<>() \
+          << ::rtc::webrtc_logging_impl::LogMetadata(file, line, sev)
+
+#define RTC_LOG(sev)                          \
+  !::rtc::LogMessage::IsNoop<::rtc::sev>() && \
+      RTC_LOG_FILE_LINE(::rtc::sev, __FILE__, __LINE__)
+
+#define RTC_LOG_IF(sev, condition)                           \
+  !::rtc::LogMessage::IsNoop<::rtc::sev>() && (condition) && \
+      RTC_LOG_FILE_LINE(::rtc::sev, __FILE__, __LINE__)
+
+// The _V version is for when a variable is passed in.
+#define RTC_LOG_V(sev) \
+  !::rtc::LogMessage::IsNoop(sev) && RTC_LOG_FILE_LINE(sev, __FILE__, __LINE__)
+
+// The _F version prefixes the message with the current function name.
+#if (defined(__GNUC__) && !defined(NDEBUG)) || defined(WANT_PRETTY_LOG_F)
+#define RTC_LOG_F(sev) RTC_LOG(sev) << __PRETTY_FUNCTION__ << ": "
+#define RTC_LOG_IF_F(sev, condition) \
+  RTC_LOG_IF(sev, condition) << __PRETTY_FUNCTION__ << ": "
+#define RTC_LOG_T_F(sev) \
+  RTC_LOG(sev) << this << ": " << __PRETTY_FUNCTION__ << ": "
+#else
+#define RTC_LOG_F(sev) RTC_LOG(sev) << __FUNCTION__ << ": "
+#define RTC_LOG_IF_F(sev, condition) \
+  RTC_LOG_IF(sev, condition) << __FUNCTION__ << ": "
+#define RTC_LOG_T_F(sev) RTC_LOG(sev) << this << ": " << __FUNCTION__ << ": "
+#endif
+
+#define RTC_LOG_CHECK_LEVEL(sev) ::rtc::LogCheckLevel(::rtc::sev)
+#define RTC_LOG_CHECK_LEVEL_V(sev) ::rtc::LogCheckLevel(sev)
+
+inline bool LogCheckLevel(LoggingSeverity sev) {
+  return (LogMessage::GetMinLogSeverity() <= sev);
+}
+
+#define RTC_LOG_E(sev, ctx, err)                                 \
+  !::rtc::LogMessage::IsNoop<::rtc::sev>() &&                    \
+      ::rtc::webrtc_logging_impl::LogCall() &                    \
+          ::rtc::webrtc_logging_impl::LogStreamer<>()            \
+              << ::rtc::webrtc_logging_impl::LogMetadataErr {    \
+    {__FILE__, __LINE__, ::rtc::sev}, ::rtc::ERRCTX_##ctx, (err) \
+  }
+
+#define RTC_LOG_T(sev) RTC_LOG(sev) << this << ": "
+
+#define RTC_LOG_ERRNO_EX(sev, err) RTC_LOG_E(sev, ERRNO, err)
+#define RTC_LOG_ERRNO(sev) RTC_LOG_ERRNO_EX(sev, errno)
+
+#if defined(WEBRTC_WIN)
+#define RTC_LOG_GLE_EX(sev, err) RTC_LOG_E(sev, HRESULT, err)
+#define RTC_LOG_GLE(sev) RTC_LOG_GLE_EX(sev, static_cast<int>(GetLastError()))
+#define RTC_LOG_ERR_EX(sev, err) RTC_LOG_GLE_EX(sev, err)
+#define RTC_LOG_ERR(sev) RTC_LOG_GLE(sev)
+#elif defined(__native_client__) && __native_client__
+#define RTC_LOG_ERR_EX(sev, err) RTC_LOG(sev)
+#define RTC_LOG_ERR(sev) RTC_LOG(sev)
+#elif defined(WEBRTC_POSIX)
+#define RTC_LOG_ERR_EX(sev, err) RTC_LOG_ERRNO_EX(sev, err)
+#define RTC_LOG_ERR(sev) RTC_LOG_ERRNO(sev)
+#endif  // WEBRTC_WIN
+
+#ifdef WEBRTC_ANDROID
+
+namespace webrtc_logging_impl {
+// TODO(kwiberg): Replace these with absl::string_view.
+inline const char* AdaptString(const char* str) {
+  return str;
+}
+inline const char* AdaptString(const std::string& str) {
+  return str.c_str();
+}
+}  // namespace webrtc_logging_impl
+
+#define RTC_LOG_TAG(sev, tag)                                 \
+  !::rtc::LogMessage::IsNoop(sev) &&                          \
+      ::rtc::webrtc_logging_impl::LogCall() &                 \
+          ::rtc::webrtc_logging_impl::LogStreamer<>()         \
+              << ::rtc::webrtc_logging_impl::LogMetadataTag { \
+    sev, ::rtc::webrtc_logging_impl::AdaptString(tag)         \
+  }
+
+#else
+
+// DEPRECATED. This macro is only intended for Android.
+#define RTC_LOG_TAG(sev, tag) RTC_LOG_V(sev)
+
+#endif
+
+// The RTC_DLOG macros are equivalent to their RTC_LOG counterparts except that
+// they only generate code in debug builds.
+#if RTC_DLOG_IS_ON
+#define RTC_DLOG(sev) RTC_LOG(sev)
+#define RTC_DLOG_IF(sev, condition) RTC_LOG_IF(sev, condition)
+#define RTC_DLOG_V(sev) RTC_LOG_V(sev)
+#define RTC_DLOG_F(sev) RTC_LOG_F(sev)
+#define RTC_DLOG_IF_F(sev, condition) RTC_LOG_IF_F(sev, condition)
+#else
+#define RTC_DLOG_EAT_STREAM_PARAMS()                \
+  while (false)                                     \
+  ::rtc::webrtc_logging_impl::LogMessageVoidify() & \
+      (::rtc::webrtc_logging_impl::LogStreamer<>())
+#define RTC_DLOG(sev) RTC_DLOG_EAT_STREAM_PARAMS()
+#define RTC_DLOG_IF(sev, condition) RTC_DLOG_EAT_STREAM_PARAMS()
+#define RTC_DLOG_V(sev) RTC_DLOG_EAT_STREAM_PARAMS()
+#define RTC_DLOG_F(sev) RTC_DLOG_EAT_STREAM_PARAMS()
+#define RTC_DLOG_IF_F(sev, condition) RTC_DLOG_EAT_STREAM_PARAMS()
+#endif
+
+}  // namespace rtc
+
+#pragma GCC diagnostic pop
+#if defined(__clang__)
+#  pragma clang diagnostic pop
+#endif
+
+#endif  // RTC_BASE_LOGGING_H_