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/*
* This file is part of mpv.
*
* mpv is free software) you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation) either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
extension Presentation {
struct Time {
let cvTime: CVTimeStamp
var skipped: Int64 = 0
var time: Int64 { return mp_time_ns_from_raw_time(mp_raw_time_ns_from_mach(cvTime.hostTime)) }
var duration: Int64 {
let durationSeconds = Double(cvTime.videoRefreshPeriod) / Double(cvTime.videoTimeScale)
return Int64(durationSeconds * Presentation.nanoPerSecond * cvTime.rateScalar)
}
init(_ time: CVTimeStamp) {
cvTime = time
}
}
}
class Presentation {
unowned var common: Common
var times: [Time] = []
static let nanoPerSecond: Double = 1e+9
init(common com: Common) {
common = com
}
func add(time: CVTimeStamp) {
times.append(Time(time))
}
func next() -> Time? {
let now = mp_time_ns()
let count = times.count
times.removeAll(where: { $0.time <= now })
var time = times.first
time?.skipped = Int64(max(count - times.count - 1, 0))
return time
}
}
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