Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 40 insertions, 0 deletions

diff --git a/third_party/libwebrtc/logging/rtc_event_log/encoder/rtc_event_log_encoder_common.cc b/third_party/libwebrtc/logging/rtc_event_log/encoder/rtc_event_log_encoder_common.cc
new file mode 100644
index 0000000000..7aea47611d
--- /dev/null
+++ b/third_party/libwebrtc/logging/rtc_event_log/encoder/rtc_event_log_encoder_common.cc
@@ -0,0 +1,40 @@
+/*
+ *  Copyright (c) 2018 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.
+ */
+
+#include "logging/rtc_event_log/encoder/rtc_event_log_encoder_common.h"
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+namespace {
+// We use 0x3fff because that gives decent precision (compared to the underlying
+// measurement producing the packet loss fraction) on the one hand, while
+// allowing us to use no more than 2 bytes in varint form on the other hand.
+// (We might also fixed-size encode using at most 14 bits.)
+constexpr uint32_t kPacketLossFractionRange = (1 << 14) - 1;  // 0x3fff
+constexpr float kPacketLossFractionRangeFloat =
+    static_cast<float>(kPacketLossFractionRange);
+}  // namespace
+
+uint32_t ConvertPacketLossFractionToProtoFormat(float packet_loss_fraction) {
+  RTC_DCHECK_GE(packet_loss_fraction, 0);
+  RTC_DCHECK_LE(packet_loss_fraction, 1);
+  return static_cast<uint32_t>(packet_loss_fraction * kPacketLossFractionRange);
+}
+
+bool ParsePacketLossFractionFromProtoFormat(uint32_t proto_packet_loss_fraction,
+                                            float* output) {
+  if (proto_packet_loss_fraction >= kPacketLossFractionRange) {
+    return false;
+  }
+  *output = proto_packet_loss_fraction / kPacketLossFractionRangeFloat;
+  return true;
+}
+}  // namespace webrtc