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/*
* Copyright (c) 2013 Functional Streams for Scala
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
// Adapted from scodec-protocols, licensed under 3-clause BSD
package fs2
package protocols
package mpeg
package transport
import scodec.Codec
import scodec.codecs.uint
case class Pid(value: Int) {
require(value >= Pid.MinValue && value <= Pid.MaxValue)
}
object Pid {
val MinValue = 0
val MaxValue = 8191
implicit val codec: Codec[Pid] = uint(13).as[Pid]
}
case class PidStamped[+A](pid: Pid, value: A) {
def map[B](f: A => B): PidStamped[B] = copy(value = f(value))
}
object PidStamped {
/** Combinator that converts a `Scan[S, I, O]` in to a `Scan[S, PidStamped[I], PidStamped[O]]` such that
* pidstamps are preserved on elements that flow through the stream.
*/
def preserve[S, I, O](t: Scan[S, I, O]): Scan[S, PidStamped[I], PidStamped[O]] =
t.lens(_.value, (psi, o) => psi.copy(value = o))
}
