mirror of
https://github.com/scottlamb/moonfire-nvr.git
synced 2024-12-27 15:45:55 -05:00
317a620e6e
* As discussed in #48, say "The Moonfire NVR Authors" at the top of every file rather than whoever created that file. Have one AUTHORS file listing everyone. * Consistently call it a "security camera network video recorder" rather than "security camera digital video recorder".
111 lines
3.2 KiB
JavaScript
111 lines
3.2 KiB
JavaScript
// vim: set et sw=2 ts=2:
|
|
//
|
|
// This file is part of Moonfire NVR, a security camera network video recorder.
|
|
// Copyright (C) 2018 The Moonfire NVR Authors
|
|
//
|
|
// 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 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// In addition, as a special exception, the copyright holders give
|
|
// permission to link the code of portions of this program with the
|
|
// OpenSSL library under certain conditions as described in each
|
|
// individual source file, and distribute linked combinations including
|
|
// the two.
|
|
//
|
|
// You must obey the GNU General Public License in all respects for all
|
|
// of the code used other than OpenSSL. If you modify file(s) with this
|
|
// exception, you may extend this exception to your version of the
|
|
// file(s), but you are not obligated to do so. If you do not wish to do
|
|
// so, delete this exception statement from your version. If you delete
|
|
// this exception statement from all source files in the program, then
|
|
// also delete it here.
|
|
//
|
|
// 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 <http://www.gnu.org/licenses/>.
|
|
|
|
import Range from './Range';
|
|
|
|
/**
|
|
* WeakMap that keeps our private data.
|
|
*
|
|
* @type {WeakMap}
|
|
*/
|
|
const _range = new WeakMap();
|
|
|
|
/**
|
|
* Class like Range to represent ranges over timestamps in 90k format.
|
|
*
|
|
* A composed member of the Range class is use for the heavy lifting, while
|
|
* this class provides a different interface.
|
|
*/
|
|
export default class Range90k {
|
|
/**
|
|
* Create a range.
|
|
*
|
|
* @param {Number} low Low value (inclusive) in range.
|
|
* @param {Number} high High value (inclusive) in range.
|
|
*/
|
|
constructor(low, high) {
|
|
_range.set(this, new Range(low, high));
|
|
}
|
|
|
|
/**
|
|
* Return the range's start time.
|
|
*
|
|
* @return {Number} Number in 90k units
|
|
*/
|
|
get startTime90k() {
|
|
return _range.get(this).low;
|
|
}
|
|
|
|
/**
|
|
* Return the range's end time.
|
|
*
|
|
* @return {Number} Number in 90k units
|
|
*/
|
|
get endTime90k() {
|
|
return _range.get(this).high;
|
|
}
|
|
|
|
/**
|
|
* Return the range's duration.
|
|
*
|
|
* @return {Number} Number in 90k units
|
|
*/
|
|
get duration90k() {
|
|
return _range.get(this).size;
|
|
}
|
|
|
|
/**
|
|
* Create a new range by trimming the current range against
|
|
* another.
|
|
*
|
|
* The returned range will lie completely within the provided range.
|
|
*
|
|
* @param {Range90k} against Range the be used for limits
|
|
* @return {Range90k} The trimmed range (always a new object)
|
|
*/
|
|
trimmed(against) {
|
|
return new Range90k(
|
|
Math.max(this.startTime90k, against.startTime90k),
|
|
Math.min(this.endTime90k, against.endTime90k)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Return a copy of this range.
|
|
*
|
|
* @return {Range90k} A copy of this range object.
|
|
*/
|
|
clone() {
|
|
return new Range90k(this.startTime90k, this.endTime90k);
|
|
}
|
|
}
|