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mirror of https://github.com/yattee/yattee.git synced 2024-12-14 14:20:32 +05:30
yattee/Model/Stream.swift
Toni Förster 6eba2a45c8
Conditional proxying
I added a new feature. When instances are not proxied, Yattee first checks the URL to make sure it is not a restricted video. Usually, music videos and sports content can only be played back by the same IP address that requested the URL in the first place. That is why some videos do not play when the proxy is disabled.

This approach has multiple advantages. First and foremost, It reduced the load on Invidious/Piped instances, since users can now directly access the videos without going through the instance, which might be severely bandwidth limited. Secondly, users don't need to manually turn on the proxy when they want to watch IP address bound content, since Yattee automatically proxies such content.

Furthermore, adding the proxy option allows mitigating some severe playback issues with invidious instances. Invidious by default returns proxied URLs for videos, and due to some bug in the Invidious proxy, scrubbing or continuing playback at a random timestamp can lead to severe wait times for the users.

This should fix numerous playback issues: #666, #626, #590, #585, #498, #457, #400
2024-05-16 19:35:31 +02:00

282 lines
7.4 KiB
Swift

import AVFoundation
import Defaults
import Foundation
// swiftlint:disable:next final_class
class Stream: Equatable, Hashable, Identifiable {
enum Resolution: String, CaseIterable, Comparable, Defaults.Serializable {
case hd2160p60
case hd2160p50
case hd2160p48
case hd2160p30
case hd1440p60
case hd1440p50
case hd1440p48
case hd1440p30
case hd1080p60
case hd1080p50
case hd1080p48
case hd1080p30
case hd720p60
case hd720p50
case hd720p48
case hd720p30
case sd480p30
case sd360p30
case sd240p30
case sd144p30
case unknown
var name: String {
"\(height)p\(refreshRate != -1 && refreshRate != 30 ? ", \(refreshRate) fps" : "")"
}
var height: Int {
if self == .unknown {
return -1
}
let resolutionPart = rawValue.components(separatedBy: "p").first!
return Int(resolutionPart.components(separatedBy: CharacterSet.decimalDigits.inverted).joined())!
}
var refreshRate: Int {
if self == .unknown {
return -1
}
let refreshRatePart = rawValue.components(separatedBy: "p")[1]
if refreshRatePart.isEmpty {
return 30
}
return Int(refreshRatePart.components(separatedBy: CharacterSet.decimalDigits.inverted).joined()) ?? -1
}
// These values are an approximation.
// https://support.google.com/youtube/answer/1722171?hl=en#zippy=%2Cbitrate
var bitrate: Int {
switch self {
case .hd2160p60, .hd2160p50, .hd2160p48, .hd2160p30:
return 56_000_000 // 56 Mbit/s
case .hd1440p60, .hd1440p50, .hd1440p48, .hd1440p30:
return 24_000_000 // 24 Mbit/s
case .hd1080p60, .hd1080p50, .hd1080p48, .hd1080p30:
return 12_000_000 // 12 Mbit/s
case .hd720p60, .hd720p50, .hd720p48, .hd720p30:
return 9_500_000 // 9.5 Mbit/s
case .sd480p30:
return 4_000_000 // 4 Mbit/s
case .sd360p30:
return 1_500_000 // 1.5 Mbit/s
case .sd240p30:
return 1_000_000 // 1 Mbit/s
case .sd144p30:
return 600_000 // 0.6 Mbit/s
case .unknown:
return 0
}
}
static func from(resolution: String, fps: Int? = nil) -> Self {
allCases.first { $0.rawValue.contains(resolution) && $0.refreshRate == (fps ?? 30) } ?? .unknown
}
static func < (lhs: Self, rhs: Self) -> Bool {
lhs.height == rhs.height ? (lhs.refreshRate < rhs.refreshRate) : (lhs.height < rhs.height)
}
}
enum Kind: String, Comparable {
case hls, adaptive, stream
private var sortOrder: Int {
switch self {
case .hls:
return 0
case .stream:
return 1
case .adaptive:
return 2
}
}
static func < (lhs: Self, rhs: Self) -> Bool {
lhs.sortOrder < rhs.sortOrder
}
}
enum Format: String {
case avc1
case mp4
case av1
case webm
case hls
case stream
case unknown
var description: String {
switch self {
case .webm:
return "WebM"
case .hls:
return "adaptive (HLS)"
case .stream:
return "Stream"
default:
return rawValue.uppercased()
}
}
static func from(_ string: String) -> Self {
let lowercased = string.lowercased()
if lowercased.contains("avc1") {
return .avc1
}
if lowercased.contains("mpeg_4") || lowercased.contains("mp4") {
return .mp4
}
if lowercased.contains("av01") {
return .av1
}
if lowercased.contains("webm") {
return .webm
}
if lowercased.contains("stream") {
return .stream
}
if lowercased.contains("hls") {
return .hls
}
return .unknown
}
}
let id = UUID()
var instance: Instance!
var audioAsset: AVURLAsset!
var videoAsset: AVURLAsset!
var hlsURL: URL!
var localURL: URL!
var resolution: Resolution!
var kind: Kind!
var format: Format!
var encoding: String?
var videoFormat: String?
var bitrate: Int?
var requestRange: String?
init(
instance: Instance? = nil,
audioAsset: AVURLAsset? = nil,
videoAsset: AVURLAsset? = nil,
hlsURL: URL? = nil,
localURL: URL? = nil,
resolution: Resolution? = nil,
kind: Kind = .hls,
encoding: String? = nil,
videoFormat: String? = nil,
bitrate: Int? = nil,
requestRange: String? = nil
) {
self.instance = instance
self.audioAsset = audioAsset
self.videoAsset = videoAsset
self.hlsURL = hlsURL
self.localURL = localURL
self.resolution = resolution
self.kind = kind
self.encoding = encoding
format = .from(videoFormat ?? "")
self.bitrate = bitrate
self.requestRange = requestRange
}
var isLocal: Bool {
localURL != nil
}
var isHLS: Bool {
hlsURL != nil
}
var quality: String {
guard localURL.isNil else { return "Opened File" }
if kind == .hls {
return "adaptive (HLS)"
}
return resolution.name
}
var shortQuality: String {
guard localURL.isNil else { return "File" }
if kind == .hls {
return "adaptive (HLS)"
}
if kind == .stream {
return resolution.name
}
return resolutionAndFormat
}
var description: String {
guard localURL.isNil else { return resolutionAndFormat }
let instanceString = instance.isNil ? "" : " - (\(instance!.description))"
return format != .hls ? "\(resolutionAndFormat)\(instanceString)" : "adaptive (HLS)\(instanceString)"
}
var resolutionAndFormat: String {
let formatString = format == .unknown ? "" : " (\(format.description))"
return "\(quality)\(formatString)"
}
var assets: [AVURLAsset] {
[audioAsset, videoAsset]
}
var videoAssetContainsAudio: Bool {
assets.dropFirst().allSatisfy { $0.url == assets.first!.url }
}
var singleAssetURL: URL? {
guard localURL.isNil else {
return URLBookmarkModel.shared.loadBookmark(localURL) ?? localURL
}
if kind == .hls {
return hlsURL
}
if videoAssetContainsAudio {
return videoAsset.url
}
return nil
}
static func == (lhs: Stream, rhs: Stream) -> Bool {
lhs.id == rhs.id
}
func hash(into hasher: inout Hasher) {
if let url = videoAsset?.url {
hasher.combine(url)
}
if let url = audioAsset?.url {
hasher.combine(url)
}
if let url = hlsURL {
hasher.combine(url)
}
}
}