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Adds bytes per second to DataType class.

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This is useful for internal calculations in bitrate control code as we
can skip conversion constants.

DataRate Example(TimeDelta time, DataSize size) {
 double time_seconds = time.seconds<double>();
 double size_bytes = size.bytes<double>();
 double rate_bytes_per_sec = size_bytes/time_seconds;
 return DataRate::bytes_per_sec(std::max(0.0,rate_bytes_per_sec));
}

Bug: webrtc:9709
Change-Id: I8eefed578b6e8eee67fc36af723216407e0d0323
Reviewed-on: https://webrtc-review.googlesource.com/c/120720
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26488}
This commit is contained in:
Sebastian Jansson 2019-01-31 11:09:35 +01:00 committed by Commit Bot
parent 813c79bff9
commit 8fe7995045
1 changed files with 9 additions and 0 deletions
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9
api/units/data_rate.h
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@ -56,6 +56,11 @@ class DataRate final : public rtc_units_impl::RelativeUnit<DataRate> {
return FromValue(bits_per_second);
}
template <typename T>
static constexpr DataRate bytes_per_sec(T bytes_per_second) {
static_assert(std::is_arithmetic<T>::value, "");
return FromFraction<8>(bytes_per_second);
}
template <typename T>
static constexpr DataRate kbps(T kilobits_per_sec) {
static_assert(std::is_arithmetic<T>::value, "");
return FromFraction<1000>(kilobits_per_sec);
@ -65,6 +70,10 @@ class DataRate final : public rtc_units_impl::RelativeUnit<DataRate> {
return ToValue<T>();
}
template <typename T = int64_t>
constexpr T bytes_per_sec() const {
return ToFraction<8, T>();
}
template <typename T = int64_t>
T kbps() const {
return ToFraction<1000, T>();
}