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PlaybackView.swift
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PlaybackView.swift
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//
// Copyright (c) SRG SSR. All rights reserved.
//
// License information is available from the LICENSE file.
//
import AVFoundation
import CoreMedia
import PillarboxMonitoring
import PillarboxPlayer
import SwiftUI
#if os(iOS)
// Behavior: h-exp, v-exp
private struct MainView: View {
@ObservedObject var player: Player
@Binding var layout: PlaybackView.Layout
let supportsPictureInPicture: Bool
let progressTracker: ProgressTracker
@StateObject private var visibilityTracker = VisibilityTracker()
@State private var metricsCollector = MetricsCollector(interval: .init(value: 1, timescale: 1), limit: 90)
@State private var layoutInfo: LayoutInfo = .none
@State private var isPresentingMetrics = false
@State private var selectedGravity: AVLayerVideoGravity = .resizeAspect
@State private var isInteracting = false
private var prioritizesVideoDevices: Bool {
player.mediaType == .video
}
private var shouldHideInterface: Bool {
isUserInterfaceHidden || (isInteracting && !shouldKeepControlsAlwaysVisible)
}
private var shouldKeepControlsAlwaysVisible: Bool {
player.isExternalPlaybackActive || player.mediaType != .video
}
var body: some View {
AdaptiveSheetContainer(isPresenting: $isPresentingMetrics) {
ZStack {
main()
bottomBar()
topBar()
}
.animation(.defaultLinear, value: shouldHideInterface)
} sheet: {
MetricsView(metricsCollector: metricsCollector)
}
.statusBarHidden(isFullScreen ? isUserInterfaceHidden : false)
.bind(visibilityTracker, to: player)
.bind(metricsCollector, to: player)
}
private var isFullScreen: Bool {
layout == .inline || layout == .maximized
}
private var gravity: AVLayerVideoGravity {
layoutInfo.isOverCurrentContext ? selectedGravity : .resizeAspect
}
private var toggleGestureMask: GestureMask {
!isInteracting ? .all : .subviews
}
private var magnificationGestureMask: GestureMask {
layoutInfo.isOverCurrentContext ? .all : .subviews
}
private var isUserInterfaceHidden: Bool {
visibilityTracker.isUserInterfaceHidden && !shouldKeepControlsAlwaysVisible && !player.canReplay()
}
private var title: String? {
player.metadata.title
}
private var subtitle: String? {
player.metadata.subtitle
}
private var isMonoscopic: Bool {
player.metadata.viewport == .monoscopic
}
private func toggleGesture() -> some Gesture {
TapGesture()
.onEnded(visibilityTracker.toggle)
}
private func magnificationGesture() -> some Gesture {
MagnificationGesture()
.onChanged { scale in
selectedGravity = scale > 1.0 ? .resizeAspectFill : .resizeAspect
}
}
private func visibilityResetGesture() -> some Gesture {
TapGesture()
.onEnded(visibilityTracker.reset)
}
@ViewBuilder
private func main() -> some View {
ZStack {
video()
controls()
}
.ignoresSafeArea()
.animation(.defaultLinear, values: isUserInterfaceHidden, isInteracting)
.readLayout(into: $layoutInfo)
.accessibilityAddTraits(.isButton)
.gesture(toggleGesture(), including: toggleGestureMask)
.gesture(magnificationGesture(), including: magnificationGestureMask)
.simultaneousGesture(visibilityResetGesture())
.supportsHighSpeed(!isMonoscopic, for: player)
}
@ViewBuilder
private func metadata() -> some View {
VStack(alignment: .leading) {
HStack {
LiveLabel(player: player, progressTracker: progressTracker)
if let subtitle {
Text(subtitle)
.font(.footnote)
.fontWeight(.semibold)
.lineLimit(2)
}
}
if let title {
Text(title)
.font(.title2)
.fontWeight(.bold)
.lineLimit(1)
}
}
.frame(maxWidth: .infinity, alignment: .leading)
.foregroundStyle(.white)
.opacity(shouldHideInterface ? 0 : 1)
}
@ViewBuilder
private func bottomBar() -> some View {
VStack(spacing: 20) {
skipButton()
bottomControls()
}
.animation(.defaultLinear, values: isUserInterfaceHidden, isInteracting)
.padding(.horizontal)
.padding(.vertical, 10)
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottom)
}
@ViewBuilder
private func bottomControls() -> some View {
VStack(spacing: 0) {
HStack(alignment: .bottom) {
metadata()
if isFullScreen {
bottomButtons()
}
}
HStack(spacing: 20) {
TimeBar(player: player, visibilityTracker: visibilityTracker, isInteracting: $isInteracting)
if !isFullScreen {
bottomButtons()
}
}
}
.preventsTouchPropagation()
.opacity(isUserInterfaceHidden ? 0 : 1)
}
@ViewBuilder
private func bottomButtons() -> some View {
HStack(spacing: 20) {
LiveButton(player: player, progressTracker: progressTracker)
SettingsMenu(player: player, isPresentingMetrics: $isPresentingMetrics)
FullScreenButton(layout: $layout)
}
.opacity(isFullScreen && shouldHideInterface ? 0 : 1)
}
@ViewBuilder
private func topBar() -> some View {
HStack {
HStack(spacing: 20) {
CloseButton()
PiPButton()
routePickerView()
}
.opacity(shouldHideInterface ? 0 : 1)
Spacer()
HStack(spacing: 20) {
LoadingIndicator(player: player)
if !shouldHideInterface {
VolumeButton(player: player)
}
}
}
.topBarStyle()
.preventsTouchPropagation()
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top)
}
@ViewBuilder
private func routePickerView() -> some View {
RoutePickerView(prioritizesVideoDevices: prioritizesVideoDevices)
.tint(.white)
.aspectRatio(contentMode: .fit)
.frame(width: 20)
}
@ViewBuilder
private func artwork(for imageSource: ImageSource) -> some View {
LazyImage(source: imageSource) { image in
image
.resizable()
.aspectRatio(contentMode: .fit)
}
.animation(.easeIn(duration: 0.2), value: imageSource)
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
@ViewBuilder
private func video() -> some View {
ZStack {
if player.mediaType == .audio {
artwork(for: player.metadata.imageSource)
}
else if player.isExternalPlaybackActive {
image(name: "tv")
}
else if isMonoscopic {
MonoscopicVideoView(player: player)
}
else {
VideoView(player: player)
.gravity(gravity)
.supportsPictureInPicture(supportsPictureInPicture)
}
}
.animation(.easeIn(duration: 0.2), values: player.mediaType, player.isExternalPlaybackActive)
}
@ViewBuilder
private func controls() -> some View {
ZStack {
Color(white: 0, opacity: 0.5)
.ignoresSafeArea()
ControlsView(player: player, progressTracker: progressTracker)
}
.opacity(shouldHideInterface ? 0 : 1)
}
@ViewBuilder
private func skipButton() -> some View {
SkipButton(player: player, progressTacker: progressTracker)
.padding(.trailing, 20)
.frame(maxWidth: .infinity, alignment: .trailing)
}
@ViewBuilder
private func image(name: String) -> some View {
Image(systemName: name)
.resizable()
.aspectRatio(contentMode: .fit)
.frame(maxWidth: .infinity, maxHeight: .infinity)
// https://www.hackingwithswift.com/quick-start/swiftui/how-to-control-the-tappable-area-of-a-view-using-contentshape
.contentShape(Rectangle())
.foregroundColor(.white)
.padding(60)
}
}
private struct SkipButton: View {
let player: Player
@ObservedObject var progressTacker: ProgressTracker
private var skippableTimeRange: TimeRange? {
player.skippableTimeRange(at: progressTacker.time)
}
var body: some View {
Button(action: skip) {
Text("Skip")
.font(.subheadline)
.bold()
.foregroundStyle(.white)
.padding(.vertical, 8)
.padding(.horizontal, 10)
.background {
RoundedRectangle(cornerRadius: 2)
.fill(Color(white: 0.1))
RoundedRectangle(cornerRadius: 2)
.stroke(lineWidth: 2.0)
.foregroundStyle(Color(white: 0.3))
}
}
.opacity(skippableTimeRange != nil ? 1 : 0)
.animation(.easeInOut, value: skippableTimeRange)
}
private func skip() {
guard let skippableTimeRange else { return }
player.seek(to: skippableTimeRange.end)
}
}
private struct ControlsView: View {
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
var body: some View {
HStack(spacing: 30) {
SkipBackwardButton(player: player, progressTracker: progressTracker)
PlaybackButton(player: player)
SkipForwardButton(player: player, progressTracker: progressTracker)
}
._debugBodyCounter(color: .green)
.animation(.defaultLinear, value: player.playbackState)
.bind(progressTracker, to: player)
}
}
// Behavior: h-hug, v-hug
private struct SkipBackwardButton: View {
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
var body: some View {
Button(action: skipBackward) {
Image(systemName: "gobackward.10")
.resizable()
.tint(.white)
}
.aspectRatio(contentMode: .fit)
.frame(height: 45)
.opacity(player.canSkipBackward() ? 1 : 0)
.animation(.defaultLinear, value: player.canSkipBackward())
.keyboardShortcut("s", modifiers: [])
}
private func skipBackward() {
player.skipBackward()
}
}
// Behavior: h-hug, v-hug
private struct SkipForwardButton: View {
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
var body: some View {
Button(action: skipForward) {
Image(systemName: "goforward.10")
.resizable()
.tint(.white)
}
.aspectRatio(contentMode: .fit)
.frame(height: 45)
.opacity(player.canSkipForward() ? 1 : 0)
.animation(.defaultLinear, value: player.canSkipForward())
.keyboardShortcut("d", modifiers: [])
}
private func skipForward() {
player.skipForward()
}
}
// Behavior: h-hug, v-hug
private struct FullScreenButton: View {
@Binding var layout: PlaybackView.Layout
var body: some View {
if let imageName {
Button(action: toggleFullScreen) {
Image(systemName: imageName)
.tint(.white)
.font(.system(size: 20))
}
.keyboardShortcut("f", modifiers: [])
}
}
private var imageName: String? {
switch layout {
case .inline:
return nil
case .minimized:
return "arrow.up.left.and.arrow.down.right"
case .maximized:
return "arrow.down.right.and.arrow.up.left"
}
}
private func toggleFullScreen() {
switch layout {
case .minimized:
layout = .maximized
case .maximized:
layout = .minimized
default:
break
}
}
}
// Behavior: h-hug, v-hug
private struct VolumeButton: View {
@ObservedObject var player: Player
var body: some View {
Button(action: toggleMuted) {
Image(systemName: imageName)
.tint(.white)
.font(.system(size: 20))
}
.keyboardShortcut("m", modifiers: [])
}
private var imageName: String {
player.isMuted ? "speaker.slash.fill" : "speaker.wave.3.fill"
}
private func toggleMuted() {
player.isMuted.toggle()
}
}
private struct SettingsMenu: View {
let player: Player
@Binding var isPresentingMetrics: Bool
var body: some View {
Menu {
player.standardSettingMenu()
metricsMenu()
} label: {
Image(systemName: "ellipsis.circle")
.font(.system(size: 20))
.tint(.white)
}
.menuOrder(.fixed)
}
@ViewBuilder
private func metricsMenu() -> some View {
if !isPresentingMetrics {
Button(action: showMetrics) {
Label("Metrics", systemImage: "chart.bar")
}
}
}
private func showMetrics() {
isPresentingMetrics = true
}
}
// Behavior: h-hug, v-hug
private struct LoadingIndicator: View {
let player: Player
@State private var isBuffering = false
var body: some View {
ProgressView()
.tint(.white)
.opacity(isBuffering ? 1 : 0)
.animation(.linear(duration: 0.1), value: isBuffering)
.onReceive(player: player, assign: \.isBuffering, to: $isBuffering)
}
}
// Behavior: h-hug, v-hug
private struct LiveLabel: View {
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
@State private var streamType: StreamType = .unknown
private var canSkipToLive: Bool {
player.canSkipToDefault()
}
private var liveButtonColor: Color {
canSkipToLive && streamType == .dvr ? .gray : .red
}
var body: some View {
Group {
if streamType == .dvr || streamType == .live {
Text("LIVE")
.font(.footnote)
.padding(.horizontal, 7)
.background(liveButtonColor)
.foregroundColor(.white)
.clipShape(.capsule)
}
}
.onReceive(player: player, assign: \.streamType, to: $streamType)
}
}
// Behavior: h-hug, v-hug
private struct LiveButton: View {
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
@State private var streamType: StreamType = .unknown
private var canSkipToLive: Bool {
streamType == .dvr && player.canSkipToDefault()
}
var body: some View {
Group {
if canSkipToLive {
Button(action: skipToLive) {
Image(systemName: "forward.end.fill")
.foregroundStyle(.white)
.fontWeight(.ultraLight)
.font(.system(size: 20))
}
}
}
.onReceive(player: player, assign: \.streamType, to: $streamType)
}
private func skipToLive() {
player.skipToDefault()
}
}
// Behavior: h-exp, v-hug
private struct TimeBar: View {
@ObservedObject var player: Player
@ObservedObject var visibilityTracker: VisibilityTracker
@Binding var isInteracting: Bool
@StateObject private var progressTracker = ProgressTracker(
interval: CMTime(value: 1, timescale: 10),
seekBehavior: UserDefaults.standard.seekBehavior
)
var body: some View {
TimeSlider(player: player, progressTracker: progressTracker, visibilityTracker: visibilityTracker)
.onChange(of: progressTracker.isInteracting) { isInteracting = $0 }
.bind(progressTracker, to: player)
}
}
// Behavior: h-exp, v-hug
private struct TimeSlider: View {
private static let shortFormatter: DateComponentsFormatter = {
let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.second, .minute]
formatter.zeroFormattingBehavior = .pad
return formatter
}()
private static let longFormatter: DateComponentsFormatter = {
let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.second, .minute, .hour]
formatter.zeroFormattingBehavior = .pad
return formatter
}()
private static let timeFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateStyle = .none
formatter.timeStyle = .medium
return formatter
}()
@ObservedObject var player: Player
@ObservedObject var progressTracker: ProgressTracker
@ObservedObject var visibilityTracker: VisibilityTracker
@State private var streamType: StreamType = .unknown
private var formattedElapsedTime: String? {
if streamType == .onDemand {
return Self.formattedTime((progressTracker.time - progressTracker.timeRange.start), duration: progressTracker.timeRange.duration)
}
else if let date = progressTracker.date() {
return Self.timeFormatter.string(from: date)
}
else {
return nil
}
}
private var formattedTotalTime: String? {
guard streamType == .onDemand else { return nil }
return Self.formattedTime(progressTracker.timeRange.duration, duration: progressTracker.timeRange.duration)
}
private var isVisible: Bool {
progressTracker.isProgressAvailable && streamType != .unknown
}
var body: some View {
PlaybackSlider(
progressTracker: progressTracker,
timeRanges: player.metadata.timeRanges,
minimumValueLabel: {
label(withText: formattedElapsedTime)
},
maximumValueLabel: {
label(withText: formattedTotalTime)
},
onDragging: {
if UserDefaults.standard.seekBehavior == .deferred {
visibilityTracker.reset()
}
}
)
.foregroundColor(.white)
.tint(.white)
.shadow(color: .init(white: 0.2, opacity: 0.8), radius: 15)
.opacity(isVisible ? 1 : 0)
._debugBodyCounter(color: .blue)
.onReceive(player: player, assign: \.streamType, to: $streamType)
}
private static func formattedTime(_ time: CMTime, duration: CMTime) -> String? {
guard time.isValid, duration.isValid else { return nil }
if duration.seconds < 60 * 60 {
return shortFormatter.string(from: time.seconds)!
}
else {
return longFormatter.string(from: time.seconds)!
}
}
@ViewBuilder
private func label(withText text: String?) -> some View {
if let text {
Text(text)
.font(.caption)
.monospacedDigit()
.foregroundColor(.white)
.shadow(color: .init(white: 0.2, opacity: 0.8), radius: 15)
}
}
}
private struct AdaptiveSheetContainer<Content, Sheet>: View where Content: View, Sheet: View {
@Binding var isPresenting: Bool
@ViewBuilder let content: () -> Content
@ViewBuilder let sheet: () -> Sheet
@Environment(\.horizontalSizeClass) private var horizontalSizeClass
var body: some View {
switch horizontalSizeClass {
case .compact:
compactView()
default:
defaultView()
}
}
private func compactView() -> some View {
content()
.sheet(isPresented: $isPresenting) {
NavigationStack {
sheet()
}
.presentationDetents([.medium, .large])
}
}
private func defaultView() -> some View {
HStack(spacing: 0) {
content()
if isPresenting {
NavigationStack {
sheet()
.toolbar(content: toolbarContent)
}
.frame(width: 420)
}
}
.animation(.default, value: isPresenting)
}
private func toolbarContent() -> some ToolbarContent {
ToolbarItem(placement: .topBarLeading) {
Button("Hide", action: close)
}
}
private func close() {
isPresenting = false
}
}
#else
private struct MainSystemView: View {
let player: Player
let supportsPictureInPicture: Bool
@ObservedObject var progressTracker: ProgressTracker
private var contextualActions: [ContextualAction] {
if let skippableTimeRange = player.skippableTimeRange(at: progressTracker.time) {
return [
.init(title: "Skip") {
player.seek(to: skippableTimeRange.end)
}
]
}
else {
return []
}
}
var body: some View {
SystemVideoView(player: player)
.supportsPictureInPicture(supportsPictureInPicture)
.contextualActions(contextualActions)
.ignoresSafeArea()
}
}
#endif
// Behavior: h-hug, v-hug
private struct PlaybackMessageView: View {
let title: String
let subtitle: String?
var body: some View {
VStack {
Text(title)
.foregroundColor(.white)
.font(.body)
if let subtitle {
Text(subtitle)
.foregroundColor(Color(uiColor: .lightGray))
.font(.subheadline)
#if os(iOS)
.textSelection(.enabled)
#endif
}
}
.padding()
.multilineTextAlignment(.center)
}
init(title: String, subtitle: String? = nil) {
self.title = title
self.subtitle = subtitle
}
}
// Behavior: h-hug, v-hug
private struct PlaybackButton: View {
@ObservedObject var player: Player
private var imageName: String? {
if player.canReplay() {
return "arrow.counterclockwise.circle.fill"
}
else if player.shouldPlay {
return "pause.circle.fill"
}
else {
return "play.circle.fill"
}
}
var body: some View {
Button(action: play) {
if let imageName {
Image(systemName: imageName)
.resizable()
.tint(.white)
}
else {
Color.clear
}
}
#if os(iOS)
.keyboardShortcut(.space, modifiers: [])
#endif
.aspectRatio(contentMode: .fit)
.frame(minWidth: 120, maxHeight: 90)
}
private func play() {
if player.canReplay() {
player.replay()
}
else {
player.togglePlayPause()
}
}
}
private struct ErrorView: View {
let description: String
@ObservedObject var player: Player
private var subtitle: String? {
let sessionIdentifiers = player.currentSessionIdentifiers(trackedBy: MetricsTracker.self)
guard !sessionIdentifiers.isEmpty else { return nil }
return "Monitoring: \(sessionIdentifiers.joined(separator: ", "))"
}
var body: some View {
VStack {
PlaybackButton(player: player)
PlaybackMessageView(title: description, subtitle: subtitle)
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.overlay(alignment: .topLeading) {
CloseButton()
.topBarStyle()
}
}
}
/// A playback view with standard controls. Requires an ancestor view to own the player to be used.
/// Behavior: h-exp, v-exp
struct PlaybackView: View {
enum Layout {
case inline
case minimized
case maximized
}
@ObservedObject private var player: Player
@Binding private var layout: Layout
@State private var progressTracker = ProgressTracker(interval: CMTime(value: 1, timescale: 1))
private var supportsPictureInPicture = false
var body: some View {
ZStack {
if let error = player.error {
ErrorView(description: error.localizedDescription, player: player)
}
else if !player.items.isEmpty {
mainView()
.persistentSystemOverlays(.hidden)
}
else {
PlaybackMessageView(title: "No content")
.frame(maxWidth: .infinity, maxHeight: .infinity)
.overlay(alignment: .topLeading) {
CloseButton()
.topBarStyle()
}
}
}
.background(.black)
.bind(progressTracker, to: player)
}
private var isMonoscopic: Bool {
player.metadata.viewport == .monoscopic
}
init(player: Player, layout: Binding<Layout> = .constant(.inline)) {
self.player = player
_layout = layout
}
@ViewBuilder
private func mainView() -> some View {
ZStack {
#if os(iOS)
MainView(
player: player,
layout: $layout,
supportsPictureInPicture: supportsPictureInPicture,
progressTracker: progressTracker
)
#else
if isMonoscopic {
VideoView(player: player)
.ignoresSafeArea()
}
else {
MainSystemView(
player: player,
supportsPictureInPicture: supportsPictureInPicture,
progressTracker: progressTracker
)
}
#endif
}
._debugBodyCounter()
}
}
extension PlaybackView {
func supportsPictureInPicture(_ supportsPictureInPicture: Bool = true) -> PlaybackView {
var view = self
view.supportsPictureInPicture = supportsPictureInPicture
return view
}
}
private extension View {
func topBarStyle() -> some View {
padding(.horizontal)
.frame(minHeight: 35)
}
}
private extension Player {
func skippableTimeRange(at time: CMTime) -> TimeRange? {
metadata.timeRanges.first { timeRange in
if case .credits = timeRange.kind, timeRange.containsTime(time) {
return true
}
else {
return false
}
}
}
}
#Preview {
PlaybackView(player: Player(item: URLMedia.onDemandVideoLocalHLS.item()))
}