320 lines
14 KiB
Swift
320 lines
14 KiB
Swift
import AVFoundation
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import Promises
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import Photos
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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 = 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?.startTime != nil && source?.endTime != nil) {
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return NSNumber(value: (Float64(source?.endTime ?? 0) - Float64(source?.startTime ?? 0)) / 1000)
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}
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var effectiveTimeRange:CMTimeRange?
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for (_, value) in video.loadedTimeRanges.enumerated() {
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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 = effectiveTimeRange {
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let playableDuration:Float64 = CMTimeGetSeconds(CMTimeRangeGetEnd(effectiveTimeRange))
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if playableDuration > 0 {
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if (source?.startTime != nil) {
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return NSNumber(value: (playableDuration - Float64(source?.startTime ?? 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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{
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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 = 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 = 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 = 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 = AVMutableComposition()
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let videoAsset:AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.video).first
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let videoCompTrack:AVMutableCompositionTrack! = mixComposition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID:kCMPersistentTrackID_Invalid)
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do {
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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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} catch {
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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(withMediaType: AVMediaType.audio, preferredTrackID:kCMPersistentTrackID_Invalid)
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do {
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try audioCompTrack.insertTimeRange(
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CMTimeRangeMake(start: .zero, duration: videoAsset.timeRange.duration),
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of: audioAsset,
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at: .zero)
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} catch {
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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, textTracks.count > 0 {
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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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do {
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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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} catch {
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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. 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, reject in
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DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(seconds)) / Double(NSEC_PER_SEC), execute: {
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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.count > 0 {
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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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}
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