1 // Copyright 2022 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #include "pw_transfer/rate_estimate.h" 16 17 namespace pw::transfer { 18 GetRateBytesPerSecond() const19size_t RateEstimate::GetRateBytesPerSecond() const { 20 if (!start_time_.has_value()) { 21 return 0; 22 } 23 24 auto elapsed_ms = std::chrono::duration_cast<std::chrono::milliseconds>( 25 chrono::SystemClock::now() - start_time_.value()); 26 if (elapsed_ms.count() == 0) { 27 return 0; 28 } 29 30 constexpr unsigned int kMillsecondsPerSecond = 1000; 31 return (static_cast<uint64_t>(bytes_transferred_) * kMillsecondsPerSecond) / 32 elapsed_ms.count(); 33 } 34 35 } // namespace pw::transfer 36