session-ios/SignalMessaging/attachments/OWSVideoPlayer.swift
2018-10-24 07:46:27 -06:00

86 lines
2.2 KiB
Swift

//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
import Foundation
import AVFoundation
@objc
protocol OWSVideoPlayerDelegate: class {
func videoPlayerDidPlayToCompletion(_ videoPlayer: OWSVideoPlayer)
}
@objc
public class OWSVideoPlayer: NSObject {
@objc
let avPlayer: AVPlayer
let audioActivity: AudioActivity
@objc
weak var delegate: OWSVideoPlayerDelegate?
@objc init(url: URL) {
self.avPlayer = AVPlayer(url: url)
self.audioActivity = AudioActivity(audioDescription: "[OWSVideoPlayer] url:\(url)", behavior: .playback)
super.init()
NotificationCenter.default.addObserver(self,
selector: #selector(playerItemDidPlayToCompletion(_:)),
name: NSNotification.Name.AVPlayerItemDidPlayToEndTime,
object: avPlayer.currentItem)
}
// MARK: Dependencies
var audioSession: OWSAudioSession {
return Environment.shared.audioSession
}
// MARK: Playback Controls
@objc
public func pause() {
avPlayer.pause()
audioSession.endAudioActivity(self.audioActivity)
}
@objc
public func play() {
let success = audioSession.startAudioActivity(self.audioActivity)
assert(success)
guard let item = avPlayer.currentItem else {
owsFailDebug("video player item was unexpectedly nil")
return
}
if item.currentTime() == item.duration {
// Rewind for repeated plays, but only if it previously played to end.
avPlayer.seek(to: kCMTimeZero)
}
avPlayer.play()
}
@objc
public func stop() {
avPlayer.pause()
avPlayer.seek(to: kCMTimeZero)
audioSession.endAudioActivity(self.audioActivity)
}
@objc(seekToTime:)
public func seek(to time: CMTime) {
avPlayer.seek(to: time)
}
// MARK: private
@objc
private func playerItemDidPlayToCompletion(_ notification: Notification) {
self.delegate?.videoPlayerDidPlayToCompletion(self)
audioSession.endAudioActivity(self.audioActivity)
}
}