| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "media/cast/common/rtp_time.h" |
| |
| #include <limits> |
| #include <sstream> |
| |
| namespace cobalt { |
| namespace media { |
| namespace cast { |
| |
| namespace { |
| |
| // Returns the base::TimeDelta nearest to the time represented by a tick count |
| // in the given timebase. |
| base::TimeDelta TicksToTimeDelta(int64_t ticks, int timebase) { |
| DCHECK_GT(timebase, 0); |
| const double micros = static_cast<double>(ticks) / timebase * |
| base::Time::kMicrosecondsPerSecond + |
| 0.5 /* rounding */; |
| DCHECK_LT(micros, static_cast<double>(std::numeric_limits<int64_t>::max())); |
| return base::TimeDelta::FromMicroseconds(static_cast<int64_t>(micros)); |
| } |
| |
| // Returns the tick count in the given timebase nearest to the base::TimeDelta. |
| int64_t TimeDeltaToTicks(base::TimeDelta delta, int timebase) { |
| DCHECK_GT(timebase, 0); |
| const double ticks = delta.InSecondsF() * timebase + 0.5 /* rounding */; |
| DCHECK_LT(ticks, static_cast<double>(std::numeric_limits<int64_t>::max())); |
| return static_cast<int64_t>(ticks); |
| } |
| |
| } // namespace |
| |
| std::ostream& operator<<(std::ostream& out, const RtpTimeDelta rhs) { |
| if (rhs.value_ >= 0) |
| out << "RTP+"; |
| else |
| out << "RTP"; |
| return out << rhs.value_; |
| } |
| |
| std::ostream& operator<<(std::ostream& out, const RtpTimeTicks rhs) { |
| return out << "RTP@" << rhs.value_; |
| } |
| |
| base::TimeDelta RtpTimeDelta::ToTimeDelta(int rtp_timebase) const { |
| return TicksToTimeDelta(value_, rtp_timebase); |
| } |
| |
| // static |
| RtpTimeDelta RtpTimeDelta::FromTimeDelta(base::TimeDelta delta, |
| int rtp_timebase) { |
| return RtpTimeDelta(TimeDeltaToTicks(delta, rtp_timebase)); |
| } |
| |
| // static |
| RtpTimeDelta RtpTimeDelta::FromTicks(int64_t ticks) { |
| return RtpTimeDelta(ticks); |
| } |
| |
| base::TimeDelta RtpTimeTicks::ToTimeDelta(int rtp_timebase) const { |
| return TicksToTimeDelta(value_, rtp_timebase); |
| } |
| |
| // static |
| RtpTimeTicks RtpTimeTicks::FromTimeDelta(base::TimeDelta delta, |
| int rtp_timebase) { |
| return RtpTimeTicks(TimeDeltaToTicks(delta, rtp_timebase)); |
| } |
| |
| } // namespace cast |
| } // namespace media |
| } // namespace cobalt |