import AVFoundation
import Promises
import Photos
/*!
* Collection of pure functions
*/
enum RCTVideoUtils {
/*!
* Calculates and returns the playable duration of the current player item using its loaded time ranges.
*
* \returns The playable duration of the current player item in seconds.
*/
static func calculatePlayableDuration(_ player:AVPlayer?) -> NSNumber {
guard let player = player,
let video:AVPlayerItem = player.currentItem,
video.status == AVPlayerItem.Status.readyToPlay else {
return 0
}
var effectiveTimeRange:CMTimeRange?
for (_, value) in video.loadedTimeRanges.enumerated() {
let timeRange:CMTimeRange = value.timeRangeValue
if CMTimeRangeContainsTime(timeRange, time: video.currentTime()) {
effectiveTimeRange = timeRange
break
}
}
if let effectiveTimeRange = effectiveTimeRange {
let playableDuration:Float64 = CMTimeGetSeconds(CMTimeRangeGetEnd(effectiveTimeRange))
if playableDuration > 0 {
return playableDuration as NSNumber
}
}
return 0
}
static func urlFilePath(filepath:NSString!, searchPath:FileManager.SearchPathDirectory) -> NSURL! {
if filepath.contains("file://") {
return NSURL(string: filepath as String)
}
// if no file found, check if the file exists in the Document directory
let paths:[String]! = NSSearchPathForDirectoriesInDomains(searchPath, .userDomainMask, true)
var relativeFilePath:String! = filepath.lastPathComponent
// the file may be multiple levels below the documents directory
let directoryString:String! = searchPath == .cachesDirectory ? "Library/Caches/" : "Documents";
let fileComponents:[String]! = filepath.components(separatedBy: directoryString)
if fileComponents.count > 1 {
relativeFilePath = fileComponents[1]
}
let path:String! = (paths.first! as NSString).appendingPathComponent(relativeFilePath)
if FileManager.default.fileExists(atPath: path) {
return NSURL.fileURL(withPath: path) as NSURL
}
return nil
}
static func playerItemSeekableTimeRange(_ player:AVPlayer?) -> CMTimeRange {
if let playerItem = player?.currentItem,
playerItem.status == .readyToPlay,
let firstItem = playerItem.seekableTimeRanges.first {
return firstItem.timeRangeValue
}
return (CMTimeRange.zero)
}
static func playerItemDuration(_ player:AVPlayer?) -> CMTime {
if let playerItem = player?.currentItem,
playerItem.status == .readyToPlay {
return(playerItem.duration)
}
return(CMTime.invalid)
}
static func calculateSeekableDuration(_ player:AVPlayer?) -> NSNumber {
let timeRange:CMTimeRange = RCTVideoUtils.playerItemSeekableTimeRange(player)
if CMTIME_IS_NUMERIC(timeRange.duration)
{
return NSNumber(value: CMTimeGetSeconds(timeRange.duration))
}
return 0
}
static func getAudioTrackInfo(_ player:AVPlayer?) -> [AnyObject]! {
guard let player = player else {
return []
}
let audioTracks:NSMutableArray! = NSMutableArray()
let group = player.currentItem?.asset.mediaSelectionGroup(forMediaCharacteristic: .audible)
for i in 0..<(group?.options.count ?? 0) {
let currentOption = group?.options[i]
var title = ""
let values = currentOption?.commonMetadata.map(\.value)
if (values?.count ?? 0) > 0, let value = values?[0] {
title = value as! String
}
let language:String! = currentOption?.extendedLanguageTag ?? ""
let audioTrack = [
"index": NSNumber(value: i),
"title": title,
"language": language
] as [String : Any]
audioTracks.add(audioTrack)
}
return audioTracks as [AnyObject]?
}
static func getTextTrackInfo(_ player:AVPlayer?) -> [TextTrack]! {
guard let player = player else {
return []
}
// if streaming video, we extract the text tracks
var textTracks:[TextTrack] = []
let group = player.currentItem?.asset.mediaSelectionGroup(forMediaCharacteristic: .legible)
for i in 0..<(group?.options.count ?? 0) {
let currentOption = group?.options[i]
var title = ""
let values = currentOption?.commonMetadata.map(\.value)
if (values?.count ?? 0) > 0, let value = values?[0] {
title = value as! String
}
let language:String! = currentOption?.extendedLanguageTag ?? ""
let textTrack = TextTrack([
"index": NSNumber(value: i),
"title": title,
"language": language
])
textTracks.append(textTrack)
}
return textTracks
}
// UNUSED
static func getCurrentTime(playerItem:AVPlayerItem?) -> Float {
return Float(CMTimeGetSeconds(playerItem?.currentTime() ?? .zero))
}
static func base64DataFromBase64String(base64String:String?) -> Data? {
if let base64String = base64String {
return Data(base64Encoded:base64String)
}
return nil
}
static func replaceURLScheme(url: URL, scheme: String?) -> URL? {
var urlComponents = URLComponents(url: url, resolvingAgainstBaseURL: false)
urlComponents?.scheme = scheme
return urlComponents?.url
}
static func extractDataFromCustomSchemeUrl(from url: URL, scheme: String) -> Data? {
guard url.scheme == scheme,
let adoptURL = RCTVideoUtils.replaceURLScheme(url:url, scheme: nil) else { return nil }
return Data(base64Encoded: adoptURL.absoluteString)
}
static func generateMixComposition(_ asset:AVAsset) -> AVMutableComposition {
let mixComposition:AVMutableComposition = AVMutableComposition()
let videoAsset:AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.video).first
let videoCompTrack:AVMutableCompositionTrack! = mixComposition.addMutableTrack(withMediaType: AVMediaType.video, preferredTrackID:kCMPersistentTrackID_Invalid)
do {
try videoCompTrack.insertTimeRange(
CMTimeRangeMake(start: .zero, duration: videoAsset.timeRange.duration),
of: videoAsset,
at: .zero)
} catch {
}
let audioAsset:AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.audio).first
let audioCompTrack:AVMutableCompositionTrack! = mixComposition.addMutableTrack(withMediaType: AVMediaType.audio, preferredTrackID:kCMPersistentTrackID_Invalid)
do {
try audioCompTrack.insertTimeRange(
CMTimeRangeMake(start: .zero, duration: videoAsset.timeRange.duration),
of: audioAsset,
at: .zero)
} catch {
}
return mixComposition
}
static func getValidTextTracks(asset:AVAsset, assetOptions:NSDictionary?, mixComposition:AVMutableComposition, textTracks:[TextTrack]?) -> [TextTrack] {
let videoAsset:AVAssetTrack! = asset.tracks(withMediaType: AVMediaType.video).first
var validTextTracks:[TextTrack] = []
if let textTracks = textTracks, textTracks.count > 0 {
for i in 0..<textTracks.count {
var textURLAsset:AVURLAsset!
let textUri:String = textTracks[i].uri
if textUri.lowercased().hasPrefix("http") {
textURLAsset = AVURLAsset(url: NSURL(string: textUri)! as URL, options:(assetOptions as! [String : Any]))
} else {
let isDisabledTrack:Bool! = textTracks[i].type == "disabled"
let searchPath:FileManager.SearchPathDirectory = isDisabledTrack ? .cachesDirectory : .documentDirectory;
textURLAsset = AVURLAsset(url: RCTVideoUtils.urlFilePath(filepath: textUri as NSString?, searchPath: searchPath) as URL, options:nil)
}
let textTrackAsset:AVAssetTrack! = textURLAsset.tracks(withMediaType: AVMediaType.text).first
if (textTrackAsset == nil) {continue} // fix when there's no textTrackAsset
validTextTracks.append(textTracks[i])
let textCompTrack:AVMutableCompositionTrack! = mixComposition.addMutableTrack(withMediaType: AVMediaType.text,
preferredTrackID:kCMPersistentTrackID_Invalid)
do {
try textCompTrack.insertTimeRange(
CMTimeRangeMake(start: .zero, duration: videoAsset.timeRange.duration),
of: textTrackAsset,
at: .zero)
} catch {
}
}
}
let emptyVttFile:TextTrack? = self.createEmptyVttFile()
if (emptyVttFile != nil) {
validTextTracks.append(emptyVttFile!)
}
return validTextTracks
}
/*
* 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
* 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.
* For more info see: https://github.com/react-native-community/react-native-video/issues/1144
*/
static func createEmptyVttFile() -> TextTrack? {
let fileManager = FileManager.default
let cachesDirectoryUrl = fileManager.urls(for: .cachesDirectory, in: .userDomainMask)[0]
let filePath = cachesDirectoryUrl.appendingPathComponent("empty.vtt").path
if !fileManager.fileExists(atPath: filePath) {
let stringToWrite = "WEBVTT\n\n1\n99:59:59.000 --> 99:59:59.001\n."
do {
try stringToWrite.write(to: URL(fileURLWithPath: filePath), atomically: true, encoding: String.Encoding.utf8)
} catch {
return nil
}
}
return TextTrack([
"language": "disabled",
"title": "EmptyVttFile",
"type": "text/vtt",
"uri": filePath,
])
}
static func delay(seconds: Int = 0) -> Promise<Void> {
return Promise<Void>(on: .global()) { fulfill, reject in
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(seconds)) / Double(NSEC_PER_SEC), execute: {
fulfill(())
})
}
}
static func preparePHAsset(uri: String) -> Promise<AVAsset?> {
return Promise<AVAsset?>(on: .global()) { fulfill, reject in
let assetId = String(uri[uri.index(uri.startIndex, offsetBy: "ph://".count)...])
guard let phAsset = PHAsset.fetchAssets(withLocalIdentifiers: [assetId], options: nil).firstObject else {
reject(NSError(domain: "", code: 0, userInfo: nil))
return
}
let options = PHVideoRequestOptions()
options.isNetworkAccessAllowed = true
PHCachingImageManager().requestAVAsset(forVideo: phAsset, options: options) { data, _, _ in
fulfill(data)
}
}
}
static func prepareAsset(source:VideoSource) -> (asset:AVURLAsset?, assetOptions:NSMutableDictionary?)? {
guard let sourceUri = source.uri, sourceUri != "" else { return nil }
var asset:AVURLAsset!
let bundlePath = Bundle.main.path(forResource: source.uri, ofType: source.type) ?? ""
let url = source.isNetwork || source.isAsset
? URL(string: source.uri ?? "")
: URL(fileURLWithPath: bundlePath)
let assetOptions:NSMutableDictionary! = NSMutableDictionary()
if source.isNetwork {
if let headers = source.requestHeaders, headers.count > 0 {
assetOptions.setObject(headers, forKey:"AVURLAssetHTTPHeaderFieldsKey" as NSCopying)
}
let cookies:[AnyObject]! = HTTPCookieStorage.shared.cookies
assetOptions.setObject(cookies, forKey:AVURLAssetHTTPCookiesKey as NSCopying)
asset = AVURLAsset(url: url!, options:assetOptions as! [String : Any])
} else {
asset = AVURLAsset(url: url!)
}
return (asset, assetOptions)
}
}