364 lines
15 KiB
Swift
364 lines
15 KiB
Swift
import AVFoundation
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import Photos
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import Promises
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/*!
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* Collection of pure functions
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*/
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enum RCTVideoUtils {
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/*!
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* Calculates and returns the playable duration of the current player item using its loaded time ranges.
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*
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* \returns The playable duration of the current player item in seconds.
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*/
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static func calculatePlayableDuration(_ player: AVPlayer?, withSource source: VideoSource?) -> NSNumber {
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guard let player,
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let video: AVPlayerItem = player.currentItem,
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video.status == AVPlayerItem.Status.readyToPlay else {
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return 0
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}
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if source?.cropStart != nil && source?.cropEnd != nil {
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return NSNumber(value: (Float64(source?.cropEnd ?? 0) - Float64(source?.cropStart ?? 0)) / 1000)
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}
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var effectiveTimeRange: CMTimeRange?
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for value in video.loadedTimeRanges {
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let timeRange: CMTimeRange = value.timeRangeValue
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if CMTimeRangeContainsTime(timeRange, time: video.currentTime()) {
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effectiveTimeRange = timeRange
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break
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}
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}
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if let effectiveTimeRange {
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let playableDuration: Float64 = CMTimeGetSeconds(CMTimeRangeGetEnd(effectiveTimeRange))
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if playableDuration > 0 {
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if source?.cropStart != nil {
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return NSNumber(value: playableDuration - Float64(source?.cropStart ?? 0) / 1000)
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}
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return playableDuration as NSNumber
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}
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}
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return 0
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}
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static func urlFilePath(filepath: NSString!, searchPath: FileManager.SearchPathDirectory) -> NSURL! {
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if filepath.contains("file://") {
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return NSURL(string: filepath as String)
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}
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// if no file found, check if the file exists in the Document directory
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let paths: [String]! = NSSearchPathForDirectoriesInDomains(searchPath, .userDomainMask, true)
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var relativeFilePath: String! = filepath.lastPathComponent
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// the file may be multiple levels below the documents directory
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let directoryString: String! = searchPath == .cachesDirectory ? "Library/Caches/" : "Documents"
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let fileComponents: [String]! = filepath.components(separatedBy: directoryString)
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if fileComponents.count > 1 {
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relativeFilePath = fileComponents[1]
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}
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let path: String! = (paths.first! as NSString).appendingPathComponent(relativeFilePath)
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if FileManager.default.fileExists(atPath: path) {
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return NSURL.fileURL(withPath: path) as NSURL
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}
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return nil
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}
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static func playerItemSeekableTimeRange(_ player: AVPlayer?) -> CMTimeRange {
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if let playerItem = player?.currentItem,
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playerItem.status == .readyToPlay,
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let firstItem = playerItem.seekableTimeRanges.first {
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return firstItem.timeRangeValue
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}
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return CMTimeRange.zero
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}
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static func playerItemDuration(_ player: AVPlayer?) -> CMTime {
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if let playerItem = player?.currentItem,
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playerItem.status == .readyToPlay {
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return playerItem.duration
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}
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return CMTime.invalid
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}
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static func calculateSeekableDuration(_ player: AVPlayer?) -> NSNumber {
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let timeRange: CMTimeRange = RCTVideoUtils.playerItemSeekableTimeRange(player)
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if CMTIME_IS_NUMERIC(timeRange.duration) {
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return NSNumber(value: CMTimeGetSeconds(timeRange.duration))
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}
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return 0
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}
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static func getAudioTrackInfo(_ player: AVPlayer?) -> [AnyObject]! {
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guard let player else {
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return []
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}
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let audioTracks: NSMutableArray! = NSMutableArray()
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let group = player.currentItem?.asset.mediaSelectionGroup(forMediaCharacteristic: .audible)
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for i in 0 ..< (group?.options.count ?? 0) {
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let currentOption = group?.options[i]
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var title = ""
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let values = currentOption?.commonMetadata.map(\.value)
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if (values?.count ?? 0) > 0, let value = values?[0] {
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title = value as! String
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}
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let language: String! = currentOption?.extendedLanguageTag ?? ""
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let selectedOption: AVMediaSelectionOption? = player.currentItem?.currentMediaSelection.selectedMediaOption(in: group!)
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let audioTrack = [
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"index": NSNumber(value: i),
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"title": title,
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"language": language ?? "",
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"selected": currentOption?.displayName == selectedOption?.displayName,
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] as [String: Any]
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audioTracks.add(audioTrack)
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}
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return audioTracks as [AnyObject]?
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}
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static func getTextTrackInfo(_ player: AVPlayer?) -> [TextTrack]! {
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guard let player else {
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return []
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}
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// if streaming video, we extract the text tracks
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var textTracks: [TextTrack] = []
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let group = player.currentItem?.asset.mediaSelectionGroup(forMediaCharacteristic: .legible)
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for i in 0 ..< (group?.options.count ?? 0) {
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let currentOption = group?.options[i]
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var title = ""
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let values = currentOption?.commonMetadata.map(\.value)
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if (values?.count ?? 0) > 0, let value = values?[0] {
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title = value as! String
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}
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let language: String! = currentOption?.extendedLanguageTag ?? ""
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let selectedOpt = player.currentItem?.currentMediaSelection
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let selectedOption: AVMediaSelectionOption? = player.currentItem?.currentMediaSelection.selectedMediaOption(in: group!)
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let textTrack = TextTrack([
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"index": NSNumber(value: i),
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"title": title,
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"language": language,
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"selected": currentOption?.displayName == selectedOption?.displayName,
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])
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textTracks.append(textTrack)
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}
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return textTracks
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}
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// UNUSED
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static func getCurrentTime(playerItem: AVPlayerItem?) -> Float {
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return Float(CMTimeGetSeconds(playerItem?.currentTime() ?? .zero))
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}
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static func base64DataFromBase64String(base64String: String?) -> Data? {
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if let base64String {
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return Data(base64Encoded: base64String)
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}
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return nil
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}
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static func replaceURLScheme(url: URL, scheme: String?) -> URL? {
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var urlComponents = URLComponents(url: url, resolvingAgainstBaseURL: false)
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urlComponents?.scheme = scheme
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return urlComponents?.url
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}
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static func extractDataFromCustomSchemeUrl(from url: URL, scheme: String) -> Data? {
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guard url.scheme == scheme,
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let adoptURL = RCTVideoUtils.replaceURLScheme(url: url, scheme: nil) else { return nil }
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return Data(base64Encoded: adoptURL.absoluteString)
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}
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static func generateMixComposition(_ asset: AVAsset) -> AVMutableComposition {
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let mixComposition = AVMutableComposition()
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let videoAsset: AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.video).first
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// we need videoAsset asset to be not null to get durration later
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if videoAsset == nil {
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return mixComposition
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}
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let videoCompTrack: AVMutableCompositionTrack! = mixComposition.addMutableTrack(
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withMediaType: AVMediaType.video,
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preferredTrackID: kCMPersistentTrackID_Invalid
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)
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try? videoCompTrack.insertTimeRange(
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CMTimeRangeMake(start: .zero, duration: videoAsset.timeRange.duration),
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of: videoAsset,
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at: .zero
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)
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let audioAsset: AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.audio).first
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let audioCompTrack: AVMutableCompositionTrack! = mixComposition.addMutableTrack(
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withMediaType: AVMediaType.audio,
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preferredTrackID: kCMPersistentTrackID_Invalid
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)
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try? audioCompTrack.insertTimeRange(
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CMTimeRangeMake(start: .zero, duration: audioAsset.timeRange.duration),
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of: audioAsset,
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at: .zero
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)
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return mixComposition
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}
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static func getValidTextTracks(asset: AVAsset, assetOptions: NSDictionary?, mixComposition: AVMutableComposition, textTracks: [TextTrack]?) -> [TextTrack] {
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let videoAsset: AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.video).first
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var validTextTracks: [TextTrack] = []
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if let textTracks, !textTracks.isEmpty {
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for i in 0 ..< textTracks.count {
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var textURLAsset: AVURLAsset!
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let textUri: String = textTracks[i].uri
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if textUri.lowercased().hasPrefix("http") {
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textURLAsset = AVURLAsset(url: NSURL(string: textUri)! as URL, options: (assetOptions as! [String: Any]))
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} else {
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let isDisabledTrack: Bool! = textTracks[i].type == "disabled"
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let searchPath: FileManager.SearchPathDirectory = isDisabledTrack ? .cachesDirectory : .documentDirectory
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textURLAsset = AVURLAsset(url: RCTVideoUtils.urlFilePath(filepath: textUri as NSString?, searchPath: searchPath) as URL, options: nil)
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}
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let textTrackAsset: AVAssetTrack! = textURLAsset.tracks(withMediaType: AVMediaType.text).first
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if textTrackAsset == nil { continue } // fix when there's no textTrackAsset
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validTextTracks.append(textTracks[i])
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let textCompTrack: AVMutableCompositionTrack! = mixComposition.addMutableTrack(withMediaType: AVMediaType.text,
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preferredTrackID: kCMPersistentTrackID_Invalid)
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if videoAsset != nil {
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try? textCompTrack.insertTimeRange(
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CMTimeRangeMake(start: .zero, duration: videoAsset!.timeRange.duration),
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of: textTrackAsset,
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at: .zero
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)
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}
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}
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}
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let emptyVttFile: TextTrack? = self.createEmptyVttFile()
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if emptyVttFile != nil {
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validTextTracks.append(emptyVttFile!)
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}
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return validTextTracks
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}
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/*
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* Create an useless/almost empty VTT file in the list with available tracks.
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* This track gets selected when you give type: "disabled" as the selectedTextTrack
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* This is needed because there is a bug where sideloaded texttracks cannot be disabled in the AVPlayer. Loading this VTT file instead solves that problem.
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* For more info see: https://github.com/react-native-community/react-native-video/issues/1144
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*/
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static func createEmptyVttFile() -> TextTrack? {
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let fileManager = FileManager.default
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let cachesDirectoryUrl = fileManager.urls(for: .cachesDirectory, in: .userDomainMask)[0]
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let filePath = cachesDirectoryUrl.appendingPathComponent("empty.vtt").path
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if !fileManager.fileExists(atPath: filePath) {
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let stringToWrite = "WEBVTT\n\n1\n99:59:59.000 --> 99:59:59.001\n."
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do {
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try stringToWrite.write(to: URL(fileURLWithPath: filePath), atomically: true, encoding: String.Encoding.utf8)
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} catch {
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return nil
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}
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}
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return TextTrack([
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"language": "disabled",
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"title": "EmptyVttFile",
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"type": "text/vtt",
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"uri": filePath,
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])
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}
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static func delay(seconds: Int = 0) -> Promise<Void> {
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return Promise<Void>(on: .global()) { fulfill, _ in
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DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(seconds)) / Double(NSEC_PER_SEC)) {
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fulfill(())
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}
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}
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}
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static func preparePHAsset(uri: String) -> Promise<AVAsset?> {
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return Promise<AVAsset?>(on: .global()) { fulfill, reject in
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let assetId = String(uri[uri.index(uri.startIndex, offsetBy: "ph://".count)...])
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guard let phAsset = PHAsset.fetchAssets(withLocalIdentifiers: [assetId], options: nil).firstObject else {
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reject(NSError(domain: "", code: 0, userInfo: nil))
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return
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}
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let options = PHVideoRequestOptions()
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options.isNetworkAccessAllowed = true
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PHCachingImageManager().requestAVAsset(forVideo: phAsset, options: options) { data, _, _ in
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fulfill(data)
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}
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}
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}
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static func prepareAsset(source: VideoSource) -> (asset: AVURLAsset?, assetOptions: NSMutableDictionary?)? {
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guard let sourceUri = source.uri, sourceUri != "" else { return nil }
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var asset: AVURLAsset!
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let bundlePath = Bundle.main.path(forResource: source.uri, ofType: source.type) ?? ""
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let url = source.isNetwork || source.isAsset
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? URL(string: source.uri ?? "")
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: URL(fileURLWithPath: bundlePath)
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let assetOptions: NSMutableDictionary! = NSMutableDictionary()
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if source.isNetwork {
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if let headers = source.requestHeaders, !headers.isEmpty {
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assetOptions.setObject(headers, forKey: "AVURLAssetHTTPHeaderFieldsKey" as NSCopying)
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}
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let cookies: [AnyObject]! = HTTPCookieStorage.shared.cookies
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assetOptions.setObject(cookies, forKey: AVURLAssetHTTPCookiesKey as NSCopying)
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asset = AVURLAsset(url: url!, options: assetOptions as! [String: Any])
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} else {
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asset = AVURLAsset(url: url!)
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}
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return (asset, assetOptions)
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}
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static func createMetadataItems(for mapping: [AVMetadataIdentifier: Any]) -> [AVMetadataItem] {
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return mapping.compactMap { createMetadataItem(for: $0, value: $1) }
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}
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static func createMetadataItem(for identifier: AVMetadataIdentifier,
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value: Any) -> AVMetadataItem {
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let item = AVMutableMetadataItem()
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item.identifier = identifier
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item.value = value as? NSCopying & NSObjectProtocol
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// Specify "und" to indicate an undefined language.
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item.extendedLanguageTag = "und"
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return item.copy() as! AVMetadataItem
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}
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static func createImageMetadataItem(imageUri: String) -> Data? {
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if let uri = URL(string: imageUri),
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let imgData = try? Data(contentsOf: uri),
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let image = UIImage(data: imgData),
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let pngData = image.pngData() {
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return pngData
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}
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return nil
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}
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static func getCurrentWindow() -> UIWindow? {
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if #available(iOS 13.0, tvOS 13, *) {
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return UIApplication.shared.connectedScenes
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.flatMap { ($0 as? UIWindowScene)?.windows ?? [] }
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.last { $0.isKeyWindow }
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} else {
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#if !os(visionOS)
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return UIApplication.shared.keyWindow
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#endif
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}
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}
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}
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