/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*
* If you would like to incorporate Link into a proprietary software application,
* please contact .
*/
#pragma once
#include
#include
#include
#include
#include
#include
namespace ableton
{
namespace link
{
// A tuple of (tempo, beats, time), with integral units
// based on microseconds. This type establishes a bijection between
// beats and wall time, given a valid tempo. It also serves as a
// payload entry.
struct Timeline
{
static const std::int32_t key = 'tmln';
static_assert(key == 0x746d6c6e, "Unexpected byte order");
Beats toBeats(const std::chrono::microseconds time) const
{
return beatOrigin + tempo.microsToBeats(time - timeOrigin);
}
std::chrono::microseconds fromBeats(const Beats beats) const
{
return timeOrigin + tempo.beatsToMicros(beats - beatOrigin);
}
friend bool operator==(const Timeline& lhs, const Timeline& rhs)
{
return std::tie(lhs.tempo, lhs.beatOrigin, lhs.timeOrigin)
== std::tie(rhs.tempo, rhs.beatOrigin, rhs.timeOrigin);
}
friend bool operator!=(const Timeline& lhs, const Timeline& rhs)
{
return !(lhs == rhs);
}
// Model the NetworkByteStreamSerializable concept
friend std::uint32_t sizeInByteStream(const Timeline& tl)
{
return discovery::sizeInByteStream(std::tie(tl.tempo, tl.beatOrigin, tl.timeOrigin));
}
template
friend It toNetworkByteStream(const Timeline& tl, It out)
{
return discovery::toNetworkByteStream(
std::tie(tl.tempo, tl.beatOrigin, tl.timeOrigin), std::move(out));
}
template
static std::pair fromNetworkByteStream(It begin, It end)
{
using namespace std;
using namespace discovery;
Timeline timeline;
auto result =
Deserialize>::fromNetworkByteStream(
std::move(begin), std::move(end));
tie(timeline.tempo, timeline.beatOrigin, timeline.timeOrigin) =
std::move(result.first);
return make_pair(std::move(timeline), std::move(result.second));
}
Tempo tempo;
Beats beatOrigin;
std::chrono::microseconds timeOrigin;
};
} // namespace link
} // namespace ableton