Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

17 files changed, 1488 insertions, 0 deletions

diff --git a/dom/media/webrtc/common/CandidateInfo.h b/dom/media/webrtc/common/CandidateInfo.h
new file mode 100644
index 0000000000..eb5b2ea299
--- /dev/null
+++ b/dom/media/webrtc/common/CandidateInfo.h
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _CANDIDATE_INFO_H__
+#define _CANDIDATE_INFO_H__
+
+#include <string>
+#include <cstdint>
+
+namespace mozilla {
+
+// This is used both by IPDL code, and by signaling code.
+struct CandidateInfo {
+  std::string mCandidate;
+  std::string mMDNSAddress;
+  std::string mActualAddress;
+  std::string mUfrag;
+  std::string mDefaultHostRtp;
+  uint16_t mDefaultPortRtp = 0;
+  std::string mDefaultHostRtcp;
+  uint16_t mDefaultPortRtcp = 0;
+};
+
+}  // namespace mozilla
+
+#endif  //_CANDIDATE_INFO_H__
diff --git a/dom/media/webrtc/common/CommonTypes.h b/dom/media/webrtc/common/CommonTypes.h
new file mode 100644
index 0000000000..e9c9ffdefc
--- /dev/null
+++ b/dom/media/webrtc/common/CommonTypes.h
@@ -0,0 +1,52 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma once
+
+#include <string>
+
+namespace csf {
+
+namespace ProviderStateEnum {
+enum ProviderState {
+  Ready,
+  Registering,
+  AwaitingIpAddress,
+  FetchingDeviceConfig,
+  Idle,
+  RecoveryPending,
+  Connected
+};
+const std::string toString(ProviderState);
+}  // namespace ProviderStateEnum
+namespace LoginErrorStatusEnum {
+enum LoginErrorStatus {
+  Ok,                             // No Error
+  Unknown,                        // Unknown Error
+  NoCallManagerConfigured,        // No Primary or Backup Call Manager
+  NoDevicesFound,                 // No devices
+  NoCsfDevicesFound,              // Devices but none of type CSF
+  PhoneConfigGenError,            // Could not generate phone config
+  SipProfileGenError,             // Could not build SIP profile
+  ConfigNotSet,                   // Config not set before calling login()
+  CreateConfigProviderFailed,     // Could not create ConfigProvider
+  CreateSoftPhoneProviderFailed,  // Could not create SoftPhoneProvider
+  MissingUsername,                // Username argument missing,
+  ManualLogout,                   // logout() has been called
+  LoggedInElseWhere,  // Another process has the mutex indicating it is logged
+                      // in
+  AuthenticationFailure,  // Authentication failure (probably bad password, but
+                          // best not to say for sure)
+  CtiCouldNotConnect,     // Could not connect to CTI service
+  InvalidServerSearchList
+};
+const std::string toString(LoginErrorStatus);
+}  // namespace LoginErrorStatusEnum
+
+namespace ErrorCodeEnum {
+enum ErrorCode { Ok, Unknown, InvalidState, InvalidArgument };
+const std::string toString(ErrorCode);
+}  // namespace ErrorCodeEnum
+
+}  // namespace csf
diff --git a/dom/media/webrtc/common/EncodingConstraints.h b/dom/media/webrtc/common/EncodingConstraints.h
new file mode 100644
index 0000000000..0bfa7f9f75
--- /dev/null
+++ b/dom/media/webrtc/common/EncodingConstraints.h
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _ENCODING_CONSTRAINTS_H_
+#define _ENCODING_CONSTRAINTS_H_
+
+#include <algorithm>
+#include "mozilla/Maybe.h"
+
+namespace mozilla {
+class EncodingConstraints {
+ public:
+  EncodingConstraints()
+      : maxWidth(0),
+        maxHeight(0),
+        maxFs(0),
+        maxBr(0),
+        maxPps(0),
+        maxMbps(0),
+        maxCpb(0),
+        maxDpb(0),
+        scaleDownBy(1.0) {}
+
+  bool operator==(const EncodingConstraints& constraints) const {
+    return maxWidth == constraints.maxWidth &&
+           maxHeight == constraints.maxHeight && maxFps == constraints.maxFps &&
+           maxFs == constraints.maxFs && maxBr == constraints.maxBr &&
+           maxPps == constraints.maxPps && maxMbps == constraints.maxMbps &&
+           maxCpb == constraints.maxCpb && maxDpb == constraints.maxDpb &&
+           scaleDownBy == constraints.scaleDownBy;
+  }
+
+  /**
+   * This returns true if the constraints affecting resolution are equal.
+   */
+  bool ResolutionEquals(const EncodingConstraints& constraints) const {
+    return maxWidth == constraints.maxWidth &&
+           maxHeight == constraints.maxHeight && maxFs == constraints.maxFs &&
+           scaleDownBy == constraints.scaleDownBy;
+  }
+
+  uint32_t maxWidth;
+  uint32_t maxHeight;
+  Maybe<double> maxFps;
+  uint32_t maxFs;
+  uint32_t maxBr;
+  uint32_t maxPps;
+  uint32_t maxMbps;    // macroblocks per second
+  uint32_t maxCpb;     // coded picture buffer size
+  uint32_t maxDpb;     // decoded picture buffer size
+  double scaleDownBy;  // To preserve resolution
+};
+}  // namespace mozilla
+
+#endif  // _ENCODING_CONSTRAINTS_H_
diff --git a/dom/media/webrtc/common/MediaEngineWrapper.h b/dom/media/webrtc/common/MediaEngineWrapper.h
new file mode 100644
index 0000000000..ba48ad57d8
--- /dev/null
+++ b/dom/media/webrtc/common/MediaEngineWrapper.h
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MEDIA_ENGINE_WRAPPER_H_
+#define MEDIA_ENGINE_WRAPPER_H_
+
+#include <mozilla/Scoped.h>
+
+namespace mozilla {
+/**
+ * A Custom scoped template to release a resoure of Type T
+ * with a function of Type F
+ * ScopedCustomReleasePtr<webrtc::VoENetwork> ptr =
+ *               webrtc::VoENetwork->GetInterface(voiceEngine);
+ *
+ */
+template <typename T>
+struct ScopedCustomReleaseTraits0 {
+  typedef T* type;
+  static T* empty() { return nullptr; }
+  static void release(T* ptr) {
+    if (ptr) {
+      (ptr)->Release();
+    }
+  }
+};
+
+SCOPED_TEMPLATE(ScopedCustomReleasePtr, ScopedCustomReleaseTraits0)
+}  // namespace mozilla
+
+#endif
diff --git a/dom/media/webrtc/common/NullDeleter.h b/dom/media/webrtc/common/NullDeleter.h
new file mode 100644
index 0000000000..76326c197e
--- /dev/null
+++ b/dom/media/webrtc/common/NullDeleter.h
@@ -0,0 +1,14 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma once
+
+/*
+ * Helper class to allow smart pointers to stack objects to be constructed for
+ * ease of unit testing. Recycled here to help expose a shared_ptr interface to
+ * objects which are really raw pointers.
+ */
+struct null_deleter {
+  void operator()(void const*) const {}
+};
diff --git a/dom/media/webrtc/common/NullTransport.h b/dom/media/webrtc/common/NullTransport.h
new file mode 100644
index 0000000000..a9b270c6d6
--- /dev/null
+++ b/dom/media/webrtc/common/NullTransport.h
@@ -0,0 +1,56 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef NULL_TRANSPORT_H_
+#define NULL_TRANSPORT_H_
+
+#include "mozilla/Attributes.h"
+
+#include "api/call/transport.h"
+
+namespace mozilla {
+
+/**
+ * NullTransport is registered as ExternalTransport to throw away data
+ */
+class NullTransport : public webrtc::Transport {
+ public:
+  virtual bool SendRtp(const uint8_t* packet, size_t length,
+                       const webrtc::PacketOptions& options) override {
+    (void)packet;
+    (void)length;
+    (void)options;
+    return true;
+  }
+
+  virtual bool SendRtcp(const uint8_t* packet, size_t length) override {
+    (void)packet;
+    (void)length;
+    return true;
+  }
+#if 0
+  virtual int SendPacket(int channel, const void *data, size_t len)
+  {
+    (void) channel; (void) data;
+    return len;
+  }
+
+  virtual int SendRTCPPacket(int channel, const void *data, size_t len)
+  {
+    (void) channel; (void) data;
+    return len;
+  }
+#endif
+  NullTransport() {}
+
+  virtual ~NullTransport() {}
+
+ private:
+  NullTransport(const NullTransport& other) = delete;
+  void operator=(const NullTransport& other) = delete;
+};
+
+}  // namespace mozilla
+
+#endif
diff --git a/dom/media/webrtc/common/Wrapper.h b/dom/media/webrtc/common/Wrapper.h
new file mode 100644
index 0000000000..69c7406b07
--- /dev/null
+++ b/dom/media/webrtc/common/Wrapper.h
@@ -0,0 +1,157 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma once
+
+/*
+ * Wrapper - Helper class for wrapper objects.
+ *
+ * This helps to construct a shared_ptr object which wraps access to an
+ * underlying handle. (The handle could be a pointer to some low-level type, a
+ * conventional C handle, an int ID, a GUID, etc.)
+ *
+ * Usage:
+ *   To obtain a FooPtr from a foo_handle_t, call
+ *     FooPtr Foo::wrap(foo_handle_t);
+ *
+ * To implement Foo using Wrapper, Foo needs to include this macro in its class
+ * definition:
+ *   CSF_DECLARE_WRAP(Foo, foo_handle_t);
+ * It also needs to include this in the cpp file, to provide the wrap()
+ * implementation and define the static Wrapper.
+ *   CSF_IMPLEMENT_WRAP(Foo, foo_handle_t);
+ * These are all declared in common/Wrapper.h - Foo.h needs to include this
+ * too.
+ * The client needs to declare Foo(foo_handle_t) as private, and provide a
+ * suitable implementation, as well as implementing wrappers for any other
+ * functions to be exposed.
+ * The client needs to implement ~Foo() to perform any cleanup as usual.
+ *
+ * wrap() will always return the same FooPtr for a given foo_handle_t, it will
+ * not construct additional objects if a suitable one already exists.
+ * changeHandle() is used in rare cases where the underlying handle is changed,
+ *                but the wrapper object is intended to remain.  This is the
+ *                case for the "fake" CC_DPCall generated on
+ *                CC_DPLine::CreateCall(), where the correct IDPCall* is
+ *                provided later.
+ * reset() is a cleanup step to wipe the handle map and allow memory to be
+ * reclaimed.
+ *
+ * Future enhancements:
+ * - For now, objects remain in the map forever.  Better would be to add a
+ *   releaseHandle() function which would allow the map to be emptied as
+ *   underlying handles expired.  While we can't force the client to give up
+ *   its shared_ptr<Foo> objects, we can remove our own copy, for instance on a
+ *   call ended event.
+ */
+
+#include <map>
+#include "prlock.h"
+#include "mozilla/Assertions.h"
+
+/*
+ * Wrapper has its own autolock class because the instances are declared
+ * statically and mozilla::Mutex will not work properly when instantiated
+ * in a static constructor.
+ */
+
+class LockNSPR {
+ public:
+  LockNSPR() : lock_(nullptr) {
+    lock_ = PR_NewLock();
+    MOZ_ASSERT(lock_);
+  }
+  ~LockNSPR() { PR_DestroyLock(lock_); }
+
+  void Acquire() { PR_Lock(lock_); }
+
+  void Release() { PR_Unlock(lock_); }
+
+ private:
+  PRLock* lock_;
+};
+
+class AutoLockNSPR {
+ public:
+  explicit AutoLockNSPR(LockNSPR& lock) : lock_(lock) { lock_.Acquire(); }
+  ~AutoLockNSPR() { lock_.Release(); }
+
+ private:
+  LockNSPR& lock_;
+};
+
+template <class T>
+class Wrapper {
+ private:
+  typedef std::map<typename T::Handle, typename T::Ptr> HandleMapType;
+  HandleMapType handleMap;
+  LockNSPR handleMapMutex;
+
+ public:
+  Wrapper() {}
+
+  typename T::Ptr wrap(typename T::Handle handle) {
+    AutoLockNSPR lock(handleMapMutex);
+    typename HandleMapType::iterator it = handleMap.find(handle);
+    if (it != handleMap.end()) {
+      return it->second;
+    } else {
+      typename T::Ptr p(new T(handle));
+      handleMap[handle] = p;
+      return p;
+    }
+  }
+
+  bool changeHandle(typename T::Handle oldHandle,
+                    typename T::Handle newHandle) {
+    AutoLockNSPR lock(handleMapMutex);
+    typename HandleMapType::iterator it = handleMap.find(oldHandle);
+    if (it != handleMap.end()) {
+      typename T::Ptr p = it->second;
+      handleMap.erase(it);
+      handleMap[newHandle] = p;
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  bool release(typename T::Handle handle) {
+    AutoLockNSPR lock(handleMapMutex);
+    typename HandleMapType::iterator it = handleMap.find(handle);
+    if (it != handleMap.end()) {
+      handleMap.erase(it);
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  void reset() {
+    AutoLockNSPR lock(handleMapMutex);
+    handleMap.clear();
+  }
+};
+
+#define CSF_DECLARE_WRAP(classname, handletype)  \
+ public:                                         \
+  static classname##Ptr wrap(handletype handle); \
+  static void reset();                           \
+  static void release(handletype handle);        \
+                                                 \
+ private:                                        \
+  friend class Wrapper<classname>;               \
+  typedef classname##Ptr Ptr;                    \
+  typedef handletype Handle;                     \
+  static Wrapper<classname>& getWrapper() {      \
+    static Wrapper<classname> wrapper;           \
+    return wrapper;                              \
+  }
+
+#define CSF_IMPLEMENT_WRAP(classname, handletype)     \
+  classname##Ptr classname::wrap(handletype handle) { \
+    return getWrapper().wrap(handle);                 \
+  }                                                   \
+  void classname::reset() { getWrapper().reset(); }   \
+  void classname::release(handletype handle) { getWrapper().release(handle); }
diff --git a/dom/media/webrtc/common/YuvStamper.cpp b/dom/media/webrtc/common/YuvStamper.cpp
new file mode 100644
index 0000000000..b0c8426983
--- /dev/null
+++ b/dom/media/webrtc/common/YuvStamper.cpp
@@ -0,0 +1,394 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#elif defined XP_WIN
+#  include <winsock2.h>
+#endif
+#include <string.h>
+
+#include "nspr.h"
+#include "YuvStamper.h"
+#include "mozilla/Sprintf.h"
+
+typedef uint32_t UINT4;  // Needed for r_crc32() call
+extern "C" {
+#include "r_crc32.h"
+}
+
+namespace mozilla {
+
+#define ON_5 0x20
+#define ON_4 0x10
+#define ON_3 0x08
+#define ON_2 0x04
+#define ON_1 0x02
+#define ON_0 0x01
+
+/*
+  0, 0, 1, 1, 0, 0,
+  0, 1, 0, 0, 1, 0,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  0, 1, 0, 0, 1, 0,
+  0, 0, 1, 1, 0, 0
+*/
+static unsigned char DIGIT_0[] = {ON_3 | ON_2, ON_4 | ON_1, ON_5 | ON_0,
+                                  ON_5 | ON_0, ON_5 | ON_0, ON_4 | ON_1,
+                                  ON_3 | ON_2};
+
+/*
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 0, 1, 0, 0,
+*/
+static unsigned char DIGIT_1[] = {ON_2, ON_2, ON_2, ON_2, ON_2, ON_2, ON_2};
+
+/*
+  1, 1, 1, 1, 1, 0,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 0,
+  1, 0, 0, 0, 0, 0,
+  1, 0, 0, 0, 0, 0,
+  0, 1, 1, 1, 1, 1,
+*/
+static unsigned char DIGIT_2[] = {
+    ON_5 | ON_4 | ON_3 | ON_2 | ON_1, ON_0, ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1,        ON_5, ON_5,
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0,
+};
+
+/*
+  1, 1, 1, 1, 1, 0,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  1, 1, 1, 1, 1, 0,
+*/
+static unsigned char DIGIT_3[] = {
+    ON_5 | ON_4 | ON_3 | ON_2 | ON_1, ON_0, ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0, ON_0, ON_0,
+    ON_5 | ON_4 | ON_3 | ON_2 | ON_1,
+};
+
+/*
+  0, 1, 0, 0, 0, 1,
+  0, 1, 0, 0, 0, 1,
+  0, 1, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1
+*/
+static unsigned char DIGIT_4[] = {
+    ON_4 | ON_0, ON_4 | ON_0, ON_4 | ON_0, ON_4 | ON_3 | ON_2 | ON_1 | ON_0,
+    ON_0,        ON_0,        ON_0,
+};
+
+/*
+  0, 1, 1, 1, 1, 1,
+  1, 0, 0, 0, 0, 0,
+  1, 0, 0, 0, 0, 0,
+  0, 1, 1, 1, 1, 0,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  1, 1, 1, 1, 1, 0,
+*/
+static unsigned char DIGIT_5[] = {
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0, ON_5, ON_5,
+    ON_4 | ON_3 | ON_2 | ON_1,        ON_0, ON_0,
+    ON_5 | ON_4 | ON_3 | ON_2 | ON_1,
+};
+
+/*
+  0, 1, 1, 1, 1, 1,
+  1, 0, 0, 0, 0, 0,
+  1, 0, 0, 0, 0, 0,
+  1, 1, 1, 1, 1, 0,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 0,
+*/
+static unsigned char DIGIT_6[] = {
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0, ON_5,        ON_5,
+    ON_4 | ON_3 | ON_2 | ON_1,        ON_5 | ON_0, ON_5 | ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1,
+};
+
+/*
+  1, 1, 1, 1, 1, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 1, 0,
+  0, 0, 0, 1, 0, 0,
+  0, 0, 1, 0, 0, 0,
+  0, 1, 0, 0, 0, 0,
+  1, 0, 0, 0, 0, 0
+*/
+static unsigned char DIGIT_7[] = {ON_5 | ON_4 | ON_3 | ON_2 | ON_1 | ON_0,
+                                  ON_0,
+                                  ON_1,
+                                  ON_2,
+                                  ON_3,
+                                  ON_4,
+                                  ON_5};
+
+/*
+  0, 1, 1, 1, 1, 1,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 0,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 0
+*/
+static unsigned char DIGIT_8[] = {
+    ON_4 | ON_3 | ON_2 | ON_1, ON_5 | ON_0, ON_5 | ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1, ON_5 | ON_0, ON_5 | ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1,
+};
+
+/*
+  0, 1, 1, 1, 1, 1,
+  1, 0, 0, 0, 0, 1,
+  1, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 0, 0, 0, 0, 1,
+  0, 1, 1, 1, 1, 0
+*/
+static unsigned char DIGIT_9[] = {
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0, ON_5 | ON_0, ON_5 | ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1 | ON_0, ON_0,        ON_0,
+    ON_4 | ON_3 | ON_2 | ON_1,
+};
+
+static unsigned char* DIGITS[] = {DIGIT_0, DIGIT_1, DIGIT_2, DIGIT_3, DIGIT_4,
+                                  DIGIT_5, DIGIT_6, DIGIT_7, DIGIT_8, DIGIT_9};
+
+YuvStamper::YuvStamper(unsigned char* pYData, uint32_t width, uint32_t height,
+                       uint32_t stride, uint32_t x, uint32_t y,
+                       unsigned char symbol_width, unsigned char symbol_height)
+    : pYData(pYData),
+      mStride(stride),
+      mWidth(width),
+      mHeight(height),
+      mSymbolWidth(symbol_width),
+      mSymbolHeight(symbol_height),
+      mCursor(x, y) {}
+
+bool YuvStamper::Encode(uint32_t width, uint32_t height, uint32_t stride,
+                        unsigned char* pYData, unsigned char* pMsg,
+                        size_t msg_len, uint32_t x, uint32_t y) {
+  YuvStamper stamper(pYData, width, height, stride, x, y, sBitSize, sBitSize);
+
+  // Reserve space for a checksum.
+  if (stamper.Capacity() < 8 * (msg_len + sizeof(uint32_t))) {
+    return false;
+  }
+
+  bool ok = false;
+  uint32_t crc;
+  unsigned char* pCrc = reinterpret_cast<unsigned char*>(&crc);
+  r_crc32(reinterpret_cast<char*>(pMsg), (int)msg_len, &crc);
+  crc = htonl(crc);
+
+  while (msg_len-- > 0) {
+    if (!stamper.Write8(*pMsg++)) {
+      return false;
+    }
+  }
+
+  // Add checksum after the message.
+  ok = stamper.Write8(*pCrc++) && stamper.Write8(*pCrc++) &&
+       stamper.Write8(*pCrc++) && stamper.Write8(*pCrc++);
+
+  return ok;
+}
+
+bool YuvStamper::Decode(uint32_t width, uint32_t height, uint32_t stride,
+                        unsigned char* pYData, unsigned char* pMsg,
+                        size_t msg_len, uint32_t x, uint32_t y) {
+  YuvStamper stamper(pYData, width, height, stride, x, y, sBitSize, sBitSize);
+
+  unsigned char* ptr = pMsg;
+  size_t len = msg_len;
+  uint32_t crc, msg_crc;
+  unsigned char* pCrc = reinterpret_cast<unsigned char*>(&crc);
+
+  // Account for space reserved for the checksum
+  if (stamper.Capacity() < 8 * (len + sizeof(uint32_t))) {
+    return false;
+  }
+
+  while (len-- > 0) {
+    if (!stamper.Read8(*ptr++)) {
+      return false;
+    }
+  }
+
+  if (!(stamper.Read8(*pCrc++) && stamper.Read8(*pCrc++) &&
+        stamper.Read8(*pCrc++) && stamper.Read8(*pCrc++))) {
+    return false;
+  }
+
+  r_crc32(reinterpret_cast<char*>(pMsg), (int)msg_len, &msg_crc);
+  return crc == htonl(msg_crc);
+}
+
+inline uint32_t YuvStamper::Capacity() {
+  // Enforce at least a symbol width and height offset from outer edges.
+  if (mCursor.y + mSymbolHeight > mHeight) {
+    return 0;
+  }
+
+  if (mCursor.x + mSymbolWidth > mWidth && !AdvanceCursor()) {
+    return 0;
+  }
+
+  // Normalize frame integral to mSymbolWidth x mSymbolHeight
+  uint32_t width = mWidth / mSymbolWidth;
+  uint32_t height = mHeight / mSymbolHeight;
+  uint32_t x = mCursor.x / mSymbolWidth;
+  uint32_t y = mCursor.y / mSymbolHeight;
+
+  return (width * height - width * y) - x;
+}
+
+bool YuvStamper::Write8(unsigned char value) {
+  // Encode MSB to LSB.
+  unsigned char mask = 0x80;
+  while (mask) {
+    if (!WriteBit(!!(value & mask))) {
+      return false;
+    }
+    mask >>= 1;
+  }
+  return true;
+}
+
+bool YuvStamper::WriteBit(bool one) {
+  // A bit is mapped to a mSymbolWidth x mSymbolHeight square of luma data
+  // points. Don't use ternary op.:
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1001708
+  unsigned char value;
+  if (one)
+    value = sYOn;
+  else
+    value = sYOff;
+
+  for (uint32_t y = 0; y < mSymbolHeight; y++) {
+    for (uint32_t x = 0; x < mSymbolWidth; x++) {
+      *(pYData + (mCursor.x + x) + ((mCursor.y + y) * mStride)) = value;
+    }
+  }
+
+  return AdvanceCursor();
+}
+
+bool YuvStamper::AdvanceCursor() {
+  mCursor.x += mSymbolWidth;
+  if (mCursor.x + mSymbolWidth > mWidth) {
+    // move to the start of the next row if possible.
+    mCursor.y += mSymbolHeight;
+    if (mCursor.y + mSymbolHeight > mHeight) {
+      // end of frame, do not advance
+      mCursor.y -= mSymbolHeight;
+      mCursor.x -= mSymbolWidth;
+      return false;
+    } else {
+      mCursor.x = 0;
+    }
+  }
+
+  return true;
+}
+
+bool YuvStamper::Read8(unsigned char& value) {
+  unsigned char octet = 0;
+  unsigned char bit = 0;
+
+  for (int i = 8; i > 0; --i) {
+    if (!ReadBit(bit)) {
+      return false;
+    }
+    octet <<= 1;
+    octet |= bit;
+  }
+
+  value = octet;
+  return true;
+}
+
+bool YuvStamper::ReadBit(unsigned char& bit) {
+  uint32_t sum = 0;
+  for (uint32_t y = 0; y < mSymbolHeight; y++) {
+    for (uint32_t x = 0; x < mSymbolWidth; x++) {
+      sum += *(pYData + mStride * (mCursor.y + y) + mCursor.x + x);
+    }
+  }
+
+  // apply threshold to collected bit square
+  bit = (sum > (sBitThreshold * mSymbolWidth * mSymbolHeight)) ? 1 : 0;
+  return AdvanceCursor();
+}
+
+bool YuvStamper::WriteDigits(uint32_t value) {
+  char buf[20];
+  SprintfLiteral(buf, "%.5u", value);
+  size_t size = strlen(buf);
+
+  if (Capacity() < size) {
+    return false;
+  }
+
+  for (size_t i = 0; i < size; ++i) {
+    if (!WriteDigit(buf[i] - '0')) return false;
+    if (!AdvanceCursor()) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+bool YuvStamper::WriteDigit(unsigned char digit) {
+  if (digit > sizeof(DIGITS) / sizeof(DIGITS[0])) return false;
+
+  unsigned char* dig = DIGITS[digit];
+  for (uint32_t row = 0; row < sDigitHeight; ++row) {
+    unsigned char mask = 0x01 << (sDigitWidth - 1);
+    for (uint32_t col = 0; col < sDigitWidth; ++col, mask >>= 1) {
+      if (dig[row] & mask) {
+        for (uint32_t xx = 0; xx < sPixelSize; ++xx) {
+          for (uint32_t yy = 0; yy < sPixelSize; ++yy) {
+            WritePixel(pYData, mCursor.x + (col * sPixelSize) + xx,
+                       mCursor.y + (row * sPixelSize) + yy);
+          }
+        }
+      }
+    }
+  }
+
+  return true;
+}
+
+void YuvStamper::WritePixel(unsigned char* data, uint32_t x, uint32_t y) {
+  unsigned char* ptr = &data[y * mStride + x];
+  // Don't use ternary op.: https://bugzilla.mozilla.org/show_bug.cgi?id=1001708
+  if (*ptr > sLumaThreshold)
+    *ptr = sLumaMin;
+  else
+    *ptr = sLumaMax;
+}
+
+}  // namespace mozilla.
diff --git a/dom/media/webrtc/common/YuvStamper.h b/dom/media/webrtc/common/YuvStamper.h
new file mode 100644
index 0000000000..f355055cd9
--- /dev/null
+++ b/dom/media/webrtc/common/YuvStamper.h
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef YUV_STAMPER_H_
+#define YUV_STAMPER_H_
+
+#include <cstdint>
+
+namespace mozilla {
+
+class YuvStamper {
+ public:
+  bool WriteDigits(uint32_t value);
+
+  template <typename T>
+  static bool Write(uint32_t width, uint32_t height, uint32_t stride,
+                    unsigned char* pYData, const T& value, uint32_t x = 0,
+                    uint32_t y = 0) {
+    YuvStamper stamper(pYData, width, height, stride, x, y,
+                       (sDigitWidth + sInterDigit) * sPixelSize,
+                       (sDigitHeight + sInterLine) * sPixelSize);
+    return stamper.WriteDigits(value);
+  }
+
+  static bool Encode(uint32_t width, uint32_t height, uint32_t stride,
+                     unsigned char* pYData, unsigned char* pMsg, size_t msg_len,
+                     uint32_t x = 0, uint32_t y = 0);
+
+  static bool Decode(uint32_t width, uint32_t height, uint32_t stride,
+                     unsigned char* pYData, unsigned char* pMsg, size_t msg_len,
+                     uint32_t x = 0, uint32_t y = 0);
+
+ private:
+  YuvStamper(unsigned char* pYData, uint32_t width, uint32_t height,
+             uint32_t stride, uint32_t x, uint32_t y,
+             unsigned char symbol_width, unsigned char symbol_height);
+
+  bool WriteDigit(unsigned char digit);
+  void WritePixel(unsigned char* data, uint32_t x, uint32_t y);
+  uint32_t Capacity();
+  bool AdvanceCursor();
+  bool WriteBit(bool one);
+  bool Write8(unsigned char value);
+  bool ReadBit(unsigned char& value);
+  bool Read8(unsigned char& bit);
+
+  const static unsigned char sPixelSize = 3;
+  const static unsigned char sDigitWidth = 6;
+  const static unsigned char sDigitHeight = 7;
+  const static unsigned char sInterDigit = 1;
+  const static unsigned char sInterLine = 1;
+  const static uint32_t sBitSize = 4;
+  const static uint32_t sBitThreshold = 60;
+  const static unsigned char sYOn = 0x80;
+  const static unsigned char sYOff = 0;
+  const static unsigned char sLumaThreshold = 96;
+  const static unsigned char sLumaMin = 16;
+  const static unsigned char sLumaMax = 235;
+
+  unsigned char* pYData;
+  uint32_t mStride;
+  uint32_t mWidth;
+  uint32_t mHeight;
+  unsigned char mSymbolWidth;
+  unsigned char mSymbolHeight;
+
+  struct Cursor {
+    Cursor(uint32_t x, uint32_t y) : x(x), y(y) {}
+    uint32_t x;
+    uint32_t y;
+  } mCursor;
+};
+
+}  // namespace mozilla
+
+#endif
diff --git a/dom/media/webrtc/common/browser_logging/CSFLog.cpp b/dom/media/webrtc/common/browser_logging/CSFLog.cpp
new file mode 100644
index 0000000000..d58f5726a5
--- /dev/null
+++ b/dom/media/webrtc/common/browser_logging/CSFLog.cpp
@@ -0,0 +1,85 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "CSFLog.h"
+
+#include <map>
+#include "prrwlock.h"
+#include "prthread.h"
+#include "nsThreadUtils.h"
+
+#include "mozilla/Logging.h"
+#include "mozilla/Sprintf.h"
+
+mozilla::LazyLogModule gSignalingLog("signaling");
+
+void CSFLogV(CSFLogLevel priority, const char* sourceFile, int sourceLine,
+             const char* tag, const char* format, va_list args) {
+#ifdef STDOUT_LOGGING
+  printf("%s\n:", tag);
+  vprintf(format, args);
+#else
+
+  mozilla::LogLevel level =
+      static_cast<mozilla::LogLevel>(static_cast<unsigned int>(priority));
+
+  // Skip doing any of this work if we're not logging the indicated level...
+  if (!MOZ_LOG_TEST(gSignalingLog, level)) {
+    return;
+  }
+
+  // Trim the path component from the filename
+  const char* lastSlash = sourceFile;
+  while (*sourceFile) {
+    if (*sourceFile == '/' || *sourceFile == '\\') {
+      lastSlash = sourceFile;
+    }
+    sourceFile++;
+  }
+  sourceFile = lastSlash;
+  if (*sourceFile == '/' || *sourceFile == '\\') {
+    sourceFile++;
+  }
+
+#  define MAX_MESSAGE_LENGTH 1024
+  char message[MAX_MESSAGE_LENGTH];
+
+  const char* threadName = NULL;
+
+  // Check if we're the main thread...
+  if (NS_IsMainThread()) {
+    threadName = "main";
+  } else {
+    threadName = PR_GetThreadName(PR_GetCurrentThread());
+  }
+
+  // If we can't find it anywhere, use a blank string
+  if (!threadName) {
+    threadName = "";
+  }
+
+  VsprintfLiteral(message, format, args);
+  MOZ_LOG(
+      gSignalingLog, level,
+      ("[%s|%s] %s:%d: %s", threadName, tag, sourceFile, sourceLine, message));
+#endif
+}
+
+void CSFLog(CSFLogLevel priority, const char* sourceFile, int sourceLine,
+            const char* tag, const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+
+  CSFLogV(priority, sourceFile, sourceLine, tag, format, ap);
+  va_end(ap);
+}
+
+int CSFLogTestLevel(CSFLogLevel priority) {
+  return MOZ_LOG_TEST(gSignalingLog, static_cast<mozilla::LogLevel>(
+                                         static_cast<unsigned int>(priority)));
+}
diff --git a/dom/media/webrtc/common/browser_logging/CSFLog.h b/dom/media/webrtc/common/browser_logging/CSFLog.h
new file mode 100644
index 0000000000..eb46b37cc3
--- /dev/null
+++ b/dom/media/webrtc/common/browser_logging/CSFLog.h
@@ -0,0 +1,58 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef CSFLOG_H
+#define CSFLOG_H
+
+#include <stdarg.h>
+
+typedef enum {
+  CSF_LOG_ERROR = 1,
+  CSF_LOG_WARNING,
+  CSF_LOG_INFO,
+  CSF_LOG_DEBUG,
+  CSF_LOG_VERBOSE,
+} CSFLogLevel;
+
+#define CSFLogError(tag, format, ...) \
+  CSFLog(CSF_LOG_ERROR, __FILE__, __LINE__, tag, format, ##__VA_ARGS__)
+#define CSFLogErrorV(tag, format, va_list_arg) \
+  CSFLogV(CSF_LOG_ERROR, __FILE__, __LINE__, tag, format, va_list_arg)
+#define CSFLogWarn(tag, format, ...) \
+  CSFLog(CSF_LOG_WARNING, __FILE__, __LINE__, tag, format, ##__VA_ARGS__)
+#define CSFLogWarnV(tag, format, va_list_arg) \
+  CSFLogV(CSF_LOG_WARNING, __FILE__, __LINE__, tag, format, va_list_arg)
+#define CSFLogInfo(tag, format, ...) \
+  CSFLog(CSF_LOG_INFO, __FILE__, __LINE__, tag, format, ##__VA_ARGS__)
+#define CSFLogInfoV(tag, format, va_list_arg) \
+  CSFLogV(CSF_LOG_INFO, __FILE__, __LINE__, tag, format, va_list_arg)
+#define CSFLogDebug(tag, format, ...) \
+  CSFLog(CSF_LOG_DEBUG, __FILE__, __LINE__, tag, format, ##__VA_ARGS__)
+#define CSFLogDebugV(tag, format, va_list_arg) \
+  CSFLogV(CSF_LOG_DEBUG, __FILE__, __LINE__, tag, format, va_list_arg)
+#define CSFLogVerbose(tag, format, ...) \
+  CSFLog(CSF_LOG_VERBOSE, __FILE__, __LINE__, tag, format, ##__VA_ARGS__)
+#define CSFLogVerboseV(tag, format, va_list_arg) \
+  CSFLogV(CSF_LOG_VERBOSE, __FILE__, __LINE__, tag, format, va_list_arg)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void CSFLog(CSFLogLevel priority, const char* sourceFile, int sourceLine,
+            const char* tag, const char* format, ...)
+#ifdef __GNUC__
+    __attribute__((format(printf, 5, 6)))
+#endif
+    ;
+
+void CSFLogV(CSFLogLevel priority, const char* sourceFile, int sourceLine,
+             const char* tag, const char* format, va_list args);
+
+int CSFLogTestLevel(CSFLogLevel priority);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/dom/media/webrtc/common/browser_logging/WebRtcLog.cpp b/dom/media/webrtc/common/browser_logging/WebRtcLog.cpp
new file mode 100644
index 0000000000..0f3769604e
--- /dev/null
+++ b/dom/media/webrtc/common/browser_logging/WebRtcLog.cpp
@@ -0,0 +1,162 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebRtcLog.h"
+
+#include "mozilla/Logging.h"
+#include "mozilla/StaticPtr.h"
+#include "prenv.h"
+#include "rtc_base/logging.h"
+
+#include "nscore.h"
+#include "nsString.h"
+#include "nsXULAppAPI.h"
+#include "mozilla/Preferences.h"
+
+#include "nsIFile.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsNativeCharsetUtils.h"
+
+using mozilla::LogLevel;
+
+static mozilla::LazyLogModule sWebRtcLog("webrtc_trace");
+static mozilla::LazyLogModule sLogAEC("AEC");
+
+class LogSinkImpl : public rtc::LogSink {
+ public:
+  LogSinkImpl() {}
+
+ private:
+  void OnLogMessage(const std::string& message) override {
+    MOZ_LOG(sWebRtcLog, LogLevel::Debug, ("%s", message.data()));
+  }
+};
+
+// For RTC_LOG()
+static mozilla::StaticAutoPtr<LogSinkImpl> sSink;
+
+void GetWebRtcLogPrefs() {
+  rtc::LogMessage::set_aec_debug_size(
+      mozilla::Preferences::GetUint("media.webrtc.debug.aec_dump_max_size"));
+}
+
+mozilla::LogLevel CheckOverrides() {
+  mozilla::LogModule* log_info = sWebRtcLog;
+  mozilla::LogLevel log_level = log_info->Level();
+
+  log_info = sLogAEC;
+  if (sLogAEC && (log_info->Level() != mozilla::LogLevel::Disabled)) {
+    rtc::LogMessage::set_aec_debug(true);
+  }
+
+  return log_level;
+}
+
+void ConfigWebRtcLog(mozilla::LogLevel level) {
+  rtc::LoggingSeverity log_level;
+  switch (level) {
+    case mozilla::LogLevel::Verbose:
+      log_level = rtc::LoggingSeverity::LS_VERBOSE;
+      break;
+    case mozilla::LogLevel::Debug:
+    case mozilla::LogLevel::Info:
+      log_level = rtc::LoggingSeverity::LS_INFO;
+      break;
+    case mozilla::LogLevel::Warning:
+      log_level = rtc::LoggingSeverity::LS_WARNING;
+      break;
+    case mozilla::LogLevel::Error:
+      log_level = rtc::LoggingSeverity::LS_ERROR;
+      break;
+    case mozilla::LogLevel::Disabled:
+      log_level = rtc::LoggingSeverity::LS_NONE;
+      break;
+    default:
+      MOZ_ASSERT(false);
+      break;
+  }
+  rtc::LogMessage::LogToDebug(log_level);
+  if (level != mozilla::LogLevel::Disabled) {
+    // always capture LOG(...) << ... logging in webrtc.org code to nspr logs
+    if (!sSink) {
+      sSink = new LogSinkImpl();
+      rtc::LogMessage::AddLogToStream(sSink, log_level);
+      // it's ok if this leaks to program end
+    }
+  } else if (sSink) {
+    rtc::LogMessage::RemoveLogToStream(sSink);
+    sSink = nullptr;
+  }
+}
+
+void StartWebRtcLog(mozilla::LogLevel log_level) {
+  if (log_level == mozilla::LogLevel::Disabled) {
+    return;
+  }
+
+  GetWebRtcLogPrefs();
+  mozilla::LogLevel level = CheckOverrides();
+
+  ConfigWebRtcLog(level);
+}
+
+void EnableWebRtcLog() {
+  GetWebRtcLogPrefs();
+  mozilla::LogLevel level = CheckOverrides();
+  ConfigWebRtcLog(level);
+}
+
+// Called when we destroy the singletons from PeerConnectionCtx or if the
+// user changes logging in about:webrtc
+void StopWebRtcLog() {
+  if (sSink) {
+    rtc::LogMessage::RemoveLogToStream(sSink);
+    sSink = nullptr;
+  }
+}
+
+nsCString ConfigAecLog() {
+  nsCString aecLogDir;
+  if (rtc::LogMessage::aec_debug()) {
+    return ""_ns;
+  }
+#if defined(ANDROID)
+  const char* default_tmp_dir = "/dev/null";
+  aecLogDir.Assign(default_tmp_dir);
+#else
+  nsCOMPtr<nsIFile> tempDir;
+  nsresult rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tempDir));
+  if (NS_SUCCEEDED(rv)) {
+#  ifdef XP_WIN
+    // WebRTC wants a path encoded in the native charset, not UTF-8.
+    nsAutoString temp;
+    tempDir->GetPath(temp);
+    NS_CopyUnicodeToNative(temp, aecLogDir);
+#  else
+    tempDir->GetNativePath(aecLogDir);
+#  endif
+  }
+#endif
+  rtc::LogMessage::set_aec_debug_filename(aecLogDir.get());
+
+  return aecLogDir;
+}
+
+nsCString StartAecLog() {
+  nsCString aecLogDir;
+  if (rtc::LogMessage::aec_debug()) {
+    return ""_ns;
+  }
+
+  GetWebRtcLogPrefs();
+  CheckOverrides();
+  aecLogDir = ConfigAecLog();
+
+  rtc::LogMessage::set_aec_debug(true);
+
+  return aecLogDir;
+}
+
+void StopAecLog() { rtc::LogMessage::set_aec_debug(false); }
diff --git a/dom/media/webrtc/common/browser_logging/WebRtcLog.h b/dom/media/webrtc/common/browser_logging/WebRtcLog.h
new file mode 100644
index 0000000000..b933ff43a5
--- /dev/null
+++ b/dom/media/webrtc/common/browser_logging/WebRtcLog.h
@@ -0,0 +1,17 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef WEBRTCLOG_H_
+#define WEBRTCLOG_H_
+
+#include "mozilla/Logging.h"
+#include "nsStringFwd.h"
+
+nsCString StartAecLog();
+void StopAecLog();
+void EnableWebRtcLog();
+void StartWebRtcLog(mozilla::LogLevel level);
+void StopWebRtcLog();
+
+#endif
diff --git a/dom/media/webrtc/common/csf_common.h b/dom/media/webrtc/common/csf_common.h
new file mode 100644
index 0000000000..8b01047553
--- /dev/null
+++ b/dom/media/webrtc/common/csf_common.h
@@ -0,0 +1,90 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _CSF_COMMON_E58E5677_950A_424c_B6C2_CA180092E6A2_H
+#define _CSF_COMMON_E58E5677_950A_424c_B6C2_CA180092E6A2_H
+
+#include <assert.h>
+#include <memory>
+#include <vector>
+#include <stdlib.h>
+
+/*
+
+This header file defines:
+
+csf_countof
+csf_sprintf
+csf_vsprintf
+
+*/
+
+/*
+  General security tip: Ensure that "format" is never a user-defined string.
+  Format should ALWAYS be something that's built into your code, not user
+  supplied. For example: never write:
+
+  csf_sprintf(buffer, csf_countof(buffer), pUserSuppliedString);
+
+  Instead write:
+
+  csf_sprintf(buffer, csf_countof(buffer), "%s", pUserSuppliedString);
+
+*/
+
+#ifdef WIN32
+#  if !defined(_countof)
+#    if !defined(__cplusplus)
+#      define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0]))
+#    else
+extern "C++" {
+template <typename _CountofType, size_t _SizeOfArray>
+char (*_csf_countof_helper(_CountofType (&_Array)[_SizeOfArray]))[_SizeOfArray];
+#      define _countof(_Array) sizeof(*_csf_countof_helper(_Array))
+}
+#    endif
+#  endif
+#else
+#  define _countof(_Array) (sizeof(_Array) / sizeof(_Array[0]))
+#endif
+// csf_countof
+
+#define csf_countof(anArray) _countof(anArray)
+
+// csf_sprintf
+
+#ifdef _WIN32
+// Unlike snprintf, sprintf_s guarantees that the buffer will be null-terminated
+// (unless the buffer size is zero).
+#  define csf_sprintf(/* char* */ buffer,                                   \
+                      /* size_t */ sizeOfBufferInCharsInclNullTerm,         \
+                      /* const char * */ format, ...)                       \
+    _snprintf_s(buffer, sizeOfBufferInCharsInclNullTerm, _TRUNCATE, format, \
+                __VA_ARGS__)
+#else
+#  define csf_sprintf(/* char */ buffer,                                    \
+                      /* size_t */ sizeOfBufferInCharsInclNullTerm,         \
+                      /* const char * */ format, ...)                       \
+    snprintf(buffer, sizeOfBufferInCharsInclNullTerm, format, __VA_ARGS__); \
+    buffer[sizeOfBufferInCharsInclNullTerm - 1] = '\0'
+#endif
+
+// csf_vsprintf
+
+#ifdef _WIN32
+#  define csf_vsprintf(/* char* */ buffer,                                  \
+                       /* size_t */ sizeOfBufferInCharsInclNullTerm,        \
+                       /* const char * */ format, /* va_list */ vaList)     \
+    vsnprintf_s(buffer, sizeOfBufferInCharsInclNullTerm, _TRUNCATE, format, \
+                vaList);                                                    \
+    buffer[sizeOfBufferInCharsInclNullTerm - 1] = '\0'
+#else
+#  define csf_vsprintf(/* char */ buffer,                               \
+                       /* size_t */ sizeOfBufferInCharsInclNullTerm,    \
+                       /* const char * */ format, /* va_list */ vaList) \
+    vsprintf(buffer, format, vaList);                                   \
+    buffer[sizeOfBufferInCharsInclNullTerm - 1] = '\0'
+#endif
+
+#endif
diff --git a/dom/media/webrtc/common/moz.build b/dom/media/webrtc/common/moz.build
new file mode 100644
index 0000000000..7605d27835
--- /dev/null
+++ b/dom/media/webrtc/common/moz.build
@@ -0,0 +1,23 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+include("/dom/media/webrtc/third_party_build/webrtc.mozbuild")
+
+EXPORTS.mozilla.dom += ["CandidateInfo.h"]
+
+LOCAL_INCLUDES += [
+    "/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr",
+    "/third_party/libwebrtc",
+    "/third_party/libwebrtc/third_party/abseil-cpp",
+]
+
+UNIFIED_SOURCES += [
+    "browser_logging/CSFLog.cpp",
+    "browser_logging/WebRtcLog.cpp",
+    "time_profiling/timecard.c",
+    "YuvStamper.cpp",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/dom/media/webrtc/common/time_profiling/timecard.c b/dom/media/webrtc/common/time_profiling/timecard.c
new file mode 100644
index 0000000000..c0218cb92d
--- /dev/null
+++ b/dom/media/webrtc/common/time_profiling/timecard.c
@@ -0,0 +1,112 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include <string.h>
+#include "timecard.h"
+#include "mozilla/mozalloc.h"
+
+Timecard* create_timecard() {
+  Timecard* tc = moz_xcalloc(1, sizeof(Timecard));
+  tc->entries_allocated = TIMECARD_INITIAL_TABLE_SIZE;
+  tc->entries = moz_xcalloc(tc->entries_allocated, sizeof(TimecardEntry));
+  tc->start_time = PR_Now();
+  return tc;
+}
+
+void destroy_timecard(Timecard* tc) {
+  free(tc->entries);
+  free(tc);
+}
+
+void stamp_timecard(Timecard* tc, const char* event, const char* file,
+                    unsigned int line, const char* function) {
+  TimecardEntry* entry = NULL;
+
+  /* Trim the path component from the filename */
+  const char* last_slash = file;
+  while (*file) {
+    if (*file == '/' || *file == '\\') {
+      last_slash = file;
+    }
+    file++;
+  }
+  file = last_slash;
+  if (*file == '/' || *file == '\\') {
+    file++;
+  }
+
+  /* Ensure there is enough space left in the entries list */
+  if (tc->curr_entry == tc->entries_allocated) {
+    tc->entries_allocated *= 2;
+    tc->entries = moz_xrealloc(tc->entries,
+                               tc->entries_allocated * sizeof(TimecardEntry));
+  }
+
+  /* Record the data into the timecard entry */
+  entry = &tc->entries[tc->curr_entry];
+  entry->timestamp = PR_Now();
+  entry->event = event;
+  entry->file = file;
+  entry->line = line;
+  entry->function = function;
+  tc->curr_entry++;
+}
+
+void print_timecard(Timecard* tc) {
+  size_t i;
+  TimecardEntry* entry;
+  size_t event_width = 5;
+  size_t file_width = 4;
+  size_t function_width = 8;
+  size_t line_width;
+  PRTime offset, delta;
+
+  for (i = 0; i < tc->curr_entry; i++) {
+    entry = &tc->entries[i];
+    if (strlen(entry->event) > event_width) {
+      event_width = strlen(entry->event);
+    }
+    if (strlen(entry->file) > file_width) {
+      file_width = strlen(entry->file);
+    }
+    if (strlen(entry->function) > function_width) {
+      function_width = strlen(entry->function);
+    }
+  }
+
+  printf("\nTimecard created %4ld.%6.6ld\n\n",
+         (long)(tc->start_time / PR_USEC_PER_SEC),
+         (long)(tc->start_time % PR_USEC_PER_SEC));
+
+  line_width =
+      1 + 11 + 11 + event_width + file_width + 6 + function_width + (4 * 3);
+
+  printf(" %-11s | %-11s | %-*s | %-*s | %-*s\n", "Timestamp", "Delta",
+         (int)event_width, "Event", (int)file_width + 6, "File",
+         (int)function_width, "Function");
+
+  for (i = 0; i <= line_width; i++) {
+    printf("=");
+  }
+  printf("\n");
+
+  for (i = 0; i < tc->curr_entry; i++) {
+    entry = &tc->entries[i];
+    offset = entry->timestamp - tc->start_time;
+    if (i > 0) {
+      delta = entry->timestamp - tc->entries[i - 1].timestamp;
+    } else {
+      delta = entry->timestamp - tc->start_time;
+    }
+    printf(" %4ld.%6.6ld | %4ld.%6.6ld | %-*s | %*s:%-5d | %-*s\n",
+           (long)(offset / PR_USEC_PER_SEC), (long)(offset % PR_USEC_PER_SEC),
+           (long)(delta / PR_USEC_PER_SEC), (long)(delta % PR_USEC_PER_SEC),
+           (int)event_width, entry->event, (int)file_width, entry->file,
+           entry->line, (int)function_width, entry->function);
+  }
+  printf("\n");
+}
diff --git a/dom/media/webrtc/common/time_profiling/timecard.h b/dom/media/webrtc/common/time_profiling/timecard.h
new file mode 100644
index 0000000000..38d4a8d1ec
--- /dev/null
+++ b/dom/media/webrtc/common/time_profiling/timecard.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef timecard_h__
+#define timecard_h__
+
+#include <stdlib.h>
+#include "prtime.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define STAMP_TIMECARD(card, event)                                      \
+  do {                                                                   \
+    if (card) {                                                          \
+      stamp_timecard((card), (event), __FILE__, __LINE__, __FUNCTION__); \
+    }                                                                    \
+  } while (0)
+
+#define TIMECARD_INITIAL_TABLE_SIZE 16
+
+/*
+ * The "const char *" members of this structure point to static strings.
+ * We do not own them, and should not attempt to deallocate them.
+ */
+
+typedef struct {
+  PRTime timestamp;
+  const char* event;
+  const char* file;
+  unsigned int line;
+  const char* function;
+} TimecardEntry;
+
+typedef struct Timecard {
+  size_t curr_entry;
+  size_t entries_allocated;
+  TimecardEntry* entries;
+  PRTime start_time;
+} Timecard;
+
+/**
+ * Creates a new Timecard structure for tracking events.
+ */
+Timecard* create_timecard();
+
+/**
+ * Frees the memory associated with a timecard. After returning, the
+ * timecard pointed to by tc is no longer valid.
+ */
+void destroy_timecard(Timecard* tc);
+
+/**
+ * Records a new event in the indicated timecard. This should not be
+ * called directly; code should instead use the STAMP_TIMECARD macro,
+ * above.
+ */
+void stamp_timecard(Timecard* tc, const char* event, const char* file,
+                    unsigned int line, const char* function);
+
+/**
+ * Formats and outputs the contents of a timecard onto stdout.
+ */
+void print_timecard(Timecard* tc);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif