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// 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 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
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