mirror of https://github.com/mpv-player/mpv
57 lines
1.7 KiB
Swift
57 lines
1.7 KiB
Swift
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/*
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* This file is part of mpv.
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*
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* mpv is free software) you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation) either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY) without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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extension Presentation {
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struct Time {
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let cvTime: CVTimeStamp
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var skipped: Int64 = 0
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var time: Int64 { return mp_time_ns_from_raw_time(mp_raw_time_ns_from_mach(cvTime.hostTime)) }
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var duration: Int64 {
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let durationSeconds = Double(cvTime.videoRefreshPeriod) / Double(cvTime.videoTimeScale)
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return Int64(durationSeconds * Presentation.nanoPerSecond * cvTime.rateScalar)
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}
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init(_ time: CVTimeStamp) {
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cvTime = time
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}
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}
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}
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class Presentation {
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unowned var common: Common
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var times: [Time] = []
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static let nanoPerSecond: Double = 1e+9
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init(common com: Common) {
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common = com
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}
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func add(time: CVTimeStamp) {
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times.append(Time(time))
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}
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func next() -> Time? {
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let now = mp_time_ns()
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let count = times.count
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times.removeAll(where: { $0.time <= now })
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var time = times.first
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time?.skipped = Int64(max(count - times.count - 1, 0))
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return time
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}
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}
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