SystemTime.h (1694B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_SYSTEMTIMENANOS_H_ 8 #define DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_SYSTEMTIMENANOS_H_ 9 10 #include "jsapi/RTCStatsReport.h" 11 #include "mozilla/TimeStamp.h" 12 #include "system_wrappers/include/clock.h" 13 14 namespace mozilla { 15 class RTCStatsTimestampMakerRealtimeClock : public webrtc::Clock { 16 public: 17 explicit RTCStatsTimestampMakerRealtimeClock( 18 const dom::RTCStatsTimestampMaker& aTimestampMaker); 19 20 webrtc::Timestamp CurrentTime() override; 21 22 // Upstream, this method depend on rtc::TimeUTCMicros for converting the 23 // monotonic system clock to Ntp, if only for the first call when deciding the 24 // Ntp offset. 25 // We override this to be able to use our own clock instead of 26 // rtc::TimeUTCMicros for ntp timestamps. 27 webrtc::NtpTime ConvertTimestampToNtpTime( 28 webrtc::Timestamp aRealtime) override; 29 30 const dom::RTCStatsTimestampMaker mTimestampMaker; 31 }; 32 33 // The time base used for WebrtcSystemTime(). Completely arbitrary. Constant. 34 TimeStamp WebrtcSystemTimeBase(); 35 36 // The returned timestamp denotes the monotonic time passed since 37 // WebrtcSystemTimeBase(). Libwebrtc uses this to track how time advances from a 38 // specific point in time. It adds an offset to make the timestamps absolute. 39 webrtc::Timestamp WebrtcSystemTime(); 40 41 webrtc::NtpTime CreateNtp(webrtc::Timestamp aTime); 42 } // namespace mozilla 43 44 #endif