122 lines
3.3 KiB
Swift
122 lines
3.3 KiB
Swift
//
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// Copyright 2018 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import AVFoundation
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import Foundation
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public protocol VideoPlayerDelegate: AnyObject {
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func videoPlayerDidPlayToCompletion(_ videoPlayer: VideoPlayer)
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}
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public class VideoPlayer: NSObject {
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public let avPlayer: AVPlayer
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private let audioActivity: AudioActivity
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private let shouldLoop: Bool
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public var isMuted = false {
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didSet {
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avPlayer.volume = isMuted ? 0 : 1
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}
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}
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weak public var delegate: VideoPlayerDelegate?
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convenience public init(url: URL) {
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self.init(url: url, shouldLoop: false)
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}
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public init(url: URL, shouldLoop: Bool, shouldMixAudioWithOthers: Bool = false) {
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avPlayer = AVPlayer(url: url)
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audioActivity = AudioActivity(
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audioDescription: "[VideoPlayer] url:\(url)",
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behavior: shouldMixAudioWithOthers ? .playbackMixWithOthers : .playback
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)
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self.shouldLoop = shouldLoop
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super.init()
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(playerItemDidPlayToCompletion(_:)),
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name: .AVPlayerItemDidPlayToEndTime,
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object: avPlayer.currentItem
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)
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}
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deinit {
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endAudioActivity()
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}
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// MARK: Playback Controls
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public func endAudioActivity() {
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audioSession.endAudioActivity(audioActivity)
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}
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public func pause() {
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avPlayer.pause()
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endAudioActivity()
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}
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public func play() {
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let success = audioSession.startAudioActivity(audioActivity)
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assert(success)
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guard let item = avPlayer.currentItem else {
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owsFailDebug("video player item was unexpectedly nil")
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return
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}
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if item.currentTime() == item.duration {
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// Rewind for repeated plays, but only if it previously played to end.
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avPlayer.seek(to: CMTime.zero)
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}
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avPlayer.play()
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}
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public func stop() {
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avPlayer.pause()
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avPlayer.seek(to: CMTime.zero)
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endAudioActivity()
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}
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public func seek(to time: CMTime) {
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// Seek with a tolerance (or precision) of a hundredth of a second.
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let tolerance = CMTime(seconds: 0.01, preferredTimescale: Self.preferredTimescale)
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avPlayer.seek(to: time, toleranceBefore: tolerance, toleranceAfter: tolerance)
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}
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public func rewind(_ seconds: TimeInterval) {
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let newTime = avPlayer.currentTime() - CMTime(seconds: seconds, preferredTimescale: Self.preferredTimescale)
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seek(to: newTime)
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}
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public func fastForward(_ seconds: TimeInterval) {
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let newTime = avPlayer.currentTime() + CMTime(seconds: seconds, preferredTimescale: Self.preferredTimescale)
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seek(to: newTime)
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}
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public var currentTimeSeconds: Double {
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return avPlayer.currentTime().seconds
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}
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private static var preferredTimescale: CMTimeScale { 1000 }
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// MARK: private
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@objc
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private func playerItemDidPlayToCompletion(_ notification: Notification) {
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delegate?.videoPlayerDidPlayToCompletion(self)
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if shouldLoop {
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avPlayer.seek(to: CMTime.zero)
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avPlayer.play()
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} else {
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endAudioActivity()
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}
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}
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}
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