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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package sdp
import (
"strconv"
)
// TimeDescription describes "t=", "r=" fields of the session description
// which are used to specify the start and stop times for a session as well as
// repeat intervals and durations for the scheduled session.
type TimeDescription struct {
// t=<start-time> <stop-time>
// https://tools.ietf.org/html/rfc4566#section-5.9
Timing Timing
// r=<repeat interval> <active duration> <offsets from start-time>
// https://tools.ietf.org/html/rfc4566#section-5.10
RepeatTimes []RepeatTime
}
// Timing defines the "t=" field's structured representation for the start and
// stop times.
type Timing struct {
StartTime uint64
StopTime uint64
}
func (t Timing) String() string {
return stringFromMarshal(t.marshalInto, t.marshalSize)
}
func (t Timing) marshalInto(b []byte) []byte {
b = append(strconv.AppendUint(b, t.StartTime, 10), ' ')
return strconv.AppendUint(b, t.StopTime, 10)
}
func (t Timing) marshalSize() (size int) {
return lenUint(t.StartTime) + 1 + lenUint(t.StopTime)
}
// RepeatTime describes the "r=" fields of the session description which
// represents the intervals and durations for repeated scheduled sessions.
type RepeatTime struct {
Interval int64
Duration int64
Offsets []int64
}
func (r RepeatTime) String() string {
return stringFromMarshal(r.marshalInto, r.marshalSize)
}
func (r RepeatTime) marshalInto(b []byte) []byte {
b = strconv.AppendInt(b, r.Interval, 10)
b = append(b, ' ')
b = strconv.AppendInt(b, r.Duration, 10)
for _, value := range r.Offsets {
b = append(b, ' ')
b = strconv.AppendInt(b, value, 10)
}
return b
}
func (r RepeatTime) marshalSize() (size int) {
size = lenInt(r.Interval)
size += 1 + lenInt(r.Duration)
for _, o := range r.Offsets {
size += 1 + lenInt(o)
}
return
}
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