1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "media/cast/test/skewed_tick_clock.h" 6 7#include "base/time/time.h" 8 9namespace media { 10namespace cast { 11namespace test { 12 13SkewedTickClock::SkewedTickClock(base::TickClock* clock) 14 : clock_(clock), 15 skew_(1.0), 16 last_skew_set_time_(clock_->NowTicks()), 17 skew_clock_at_last_set_(last_skew_set_time_) { 18} 19 20base::TimeTicks SkewedTickClock::SkewTicks(base::TimeTicks now) { 21 return base::TimeDelta::FromMicroseconds( 22 (now - last_skew_set_time_).InMicroseconds() * skew_) + 23 skew_clock_at_last_set_; 24} 25 26void SkewedTickClock::SetSkew(double skew, base::TimeDelta offset) { 27 base::TimeTicks now = clock_->NowTicks(); 28 skew_clock_at_last_set_ = SkewTicks(now) + offset; 29 skew_ = skew; 30 last_skew_set_time_ = now; 31} 32 33base::TimeTicks SkewedTickClock::NowTicks() { 34 return SkewTicks(clock_->NowTicks()); 35} 36 37} // namespace test 38} // namespace cast 39} // namespace media 40