508 lines
16 KiB
Swift
508 lines
16 KiB
Swift
import Libmpv
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import UIKit
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/// Protocol for receiving player events
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protocol MpvPlayerDelegate: AnyObject {
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func onPropertyChange(name: String, value: Any?)
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func onEvent(name: String, data: [String: Any]?)
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}
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// Workaround for MoltenVK problems that cause flicker
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// https://github.com/mpv-player/mpv/pull/13651
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private class MetalLayer: CAMetalLayer {
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override var drawableSize: CGSize {
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get { return super.drawableSize }
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set {
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if Int(newValue.width) > 1 && Int(newValue.height) > 1 {
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super.drawableSize = newValue
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}
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}
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}
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// Fix for target-colorspace-hint - needs main thread for EDR
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@available(iOS 16.0, *)
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override var wantsExtendedDynamicRangeContent: Bool {
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get { return super.wantsExtendedDynamicRangeContent }
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set {
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if Thread.isMainThread {
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super.wantsExtendedDynamicRangeContent = newValue
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} else {
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DispatchQueue.main.sync {
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super.wantsExtendedDynamicRangeContent = newValue
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}
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}
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}
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}
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}
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/// Core MPV player using Metal rendering for iOS
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class MpvPlayerCore: NSObject {
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// MARK: - Properties
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private var metalLayer: MetalLayer?
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private var containerView: UIView? // Container for proper EDR activation
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private var mpv: OpaquePointer?
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private weak var window: UIWindow?
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private lazy var queue = DispatchQueue(label: "mpv", qos: .userInitiated)
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weak var delegate: MpvPlayerDelegate?
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private(set) var isInitialized = false
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// HDR settings
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private var hdrEnabled = true // User preference for HDR
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private var lastSigPeak: Double = 0.0 // Last known sig-peak for re-evaluation
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// MARK: - Initialization
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func initialize(in window: UIWindow) -> Bool {
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guard !isInitialized else {
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print("[MpvPlayerCore] Already initialized")
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return true
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}
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self.window = window
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// Create container view for proper EDR activation
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// EDR requires the CAMetalLayer to be in a UIView hierarchy, not just window.layer
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let container = UIView(frame: window.bounds)
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container.backgroundColor = .clear
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container.isUserInteractionEnabled = false
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// Create Metal layer for video rendering
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let layer = MetalLayer()
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layer.frame = container.bounds
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layer.contentsScale = UIScreen.main.nativeScale
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layer.framebufferOnly = true
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layer.backgroundColor = UIColor.black.cgColor
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container.layer.addSublayer(layer)
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containerView = container
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metalLayer = layer
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// Add container view to window (behind Flutter's root view controller)
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window.insertSubview(container, at: 0)
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print(
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"[MpvPlayerCore] Metal layer added to window via container view, frame: \(layer.frame)")
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// Initialize MPV with this Metal layer
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guard setupMpv() else {
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print("[MpvPlayerCore] Failed to setup MPV")
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layer.removeFromSuperlayer()
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container.removeFromSuperview()
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metalLayer = nil
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containerView = nil
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return false
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}
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// Setup background/foreground notifications
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setupNotifications()
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isInitialized = true
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print("[MpvPlayerCore] Initialized successfully with MPV")
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return true
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}
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private func setupMpv() -> Bool {
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guard let metalLayer = metalLayer else { return false }
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mpv = mpv_create()
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guard mpv != nil else {
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print("[MpvPlayerCore] Failed to create MPV context")
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return false
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}
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// Logging
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#if DEBUG
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checkError(mpv_request_log_messages(mpv, "info"))
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#else
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checkError(mpv_request_log_messages(mpv, "warn"))
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#endif
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// Set the Metal layer as the render target (must use local var for &)
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var layer = metalLayer
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checkError(mpv_set_option(mpv, "wid", MPV_FORMAT_INT64, &layer))
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// Video output settings for Metal/Vulkan
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checkError(mpv_set_option_string(mpv, "vo", "gpu-next"))
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checkError(mpv_set_option_string(mpv, "gpu-api", "vulkan"))
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checkError(mpv_set_option_string(mpv, "gpu-context", "moltenvk"))
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checkError(mpv_set_option_string(mpv, "hwdec", "videotoolbox"))
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checkError(mpv_set_option_string(mpv, "target-colorspace-hint", "yes"))
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// Initialize MPV
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let initResult = mpv_initialize(mpv)
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if initResult < 0 {
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print(
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"[MpvPlayerCore] mpv_initialize failed: \(String(cString: mpv_error_string(initResult)))"
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)
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mpv_terminate_destroy(mpv)
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mpv = nil
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return false
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}
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// Set up wakeup callback for event handling
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mpv_set_wakeup_callback(
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mpv,
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{ ctx in
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let core = Unmanaged<MpvPlayerCore>.fromOpaque(ctx!).takeUnretainedValue()
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core.readEvents()
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}, UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque()))
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// Observe video-params/sig-peak for HDR detection
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mpv_observe_property(mpv, 0, "video-params/sig-peak", MPV_FORMAT_DOUBLE)
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print("[MpvPlayerCore] MPV initialized successfully")
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return true
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}
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// MARK: - Background/Foreground Handling
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private func setupNotifications() {
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(enterBackground),
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name: UIApplication.didEnterBackgroundNotification,
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object: nil
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)
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(enterForeground),
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name: UIApplication.willEnterForegroundNotification,
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object: nil
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)
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}
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@objc private func enterBackground() {
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// Disable video output to fix black screen when returning from background
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print("[MpvPlayerCore] Entering background - disabling video")
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if mpv != nil {
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mpv_set_option_string(mpv, "vid", "no")
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}
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}
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@objc private func enterForeground() {
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// Re-enable video output
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print("[MpvPlayerCore] Entering foreground - enabling video")
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if mpv != nil {
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mpv_set_option_string(mpv, "vid", "auto")
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}
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}
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// MARK: - MPV Properties and Commands
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func setProperty(_ name: String, value: String) {
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guard mpv != nil else { return }
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// Handle custom HDR toggle property
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if name == "hdr-enabled" {
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let enabled = value == "yes" || value == "true" || value == "1"
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setHDREnabled(enabled)
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return
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}
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mpv_set_property_string(mpv, name, value)
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}
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/// Enable or disable HDR mode
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func setHDREnabled(_ enabled: Bool) {
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hdrEnabled = enabled
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print("[MpvPlayerCore] HDR enabled: \(enabled)")
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// Update MPV's target-colorspace-hint
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if mpv != nil {
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mpv_set_property_string(mpv, "target-colorspace-hint", enabled ? "yes" : "no")
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}
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// Re-evaluate EDR mode with current sig-peak
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DispatchQueue.main.async {
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self.updateEDRMode(sigPeak: self.lastSigPeak)
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}
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}
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func getProperty(_ name: String) -> String? {
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guard mpv != nil else { return nil }
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let cstr = mpv_get_property_string(mpv, name)
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defer { mpv_free(cstr) }
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return cstr.map { String(cString: $0) }
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}
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func observeProperty(_ name: String, format: String) {
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guard mpv != nil else { return }
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let mpvFormat: mpv_format
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switch format {
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case "double": mpvFormat = MPV_FORMAT_DOUBLE
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case "flag": mpvFormat = MPV_FORMAT_FLAG
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case "node": mpvFormat = MPV_FORMAT_NODE
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case "string": mpvFormat = MPV_FORMAT_STRING
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default: return
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}
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mpv_observe_property(mpv, 0, name, mpvFormat)
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}
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func command(_ args: [String]) {
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guard mpv != nil, !args.isEmpty else { return }
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command(args[0], args: Array(args.dropFirst()))
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}
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// MARK: - Visibility
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func setVisible(_ visible: Bool) {
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guard let container = containerView else { return }
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if visible {
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// Re-insert at the bottom of the window view stack
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container.removeFromSuperview()
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window?.insertSubview(container, at: 0)
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}
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container.isHidden = !visible
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print("[MpvPlayerCore] setVisible(\(visible))")
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}
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func updateFrame(_ frame: CGRect? = nil) {
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guard let metalLayer = metalLayer, let container = containerView else { return }
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if let frame = frame {
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container.frame = frame
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metalLayer.frame = container.bounds
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} else if let window = window {
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container.frame = window.bounds
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metalLayer.frame = container.bounds
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}
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// Update drawable size for proper scaling
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let scale = UIScreen.main.nativeScale
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metalLayer.drawableSize = CGSize(
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width: metalLayer.frame.width * scale,
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height: metalLayer.frame.height * scale
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)
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print("[MpvPlayerCore] updateFrame: \(container.frame)")
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}
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// MARK: - Private Helpers
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private func command(_ cmd: String, args: [String] = []) {
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guard mpv != nil else { return }
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// Build array of C strings for mpv_command
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var cargs: [UnsafeMutablePointer<CChar>?] = ([cmd] + args).map { strdup($0) }
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cargs.append(nil) // null-terminate
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defer {
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for ptr in cargs {
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free(ptr)
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}
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}
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// mpv_command expects UnsafePointer, use withUnsafeBufferPointer for the conversion
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cargs.withUnsafeBufferPointer { buffer in
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var constPtrs = buffer.map { UnsafePointer($0) }
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_ = mpv_command(mpv, &constPtrs)
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}
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}
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private func readEvents() {
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queue.async { [weak self] in
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guard let self = self, let mpv = self.mpv else { return }
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while true {
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let event = mpv_wait_event(mpv, 0)
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guard let eventPtr = event else { break }
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if eventPtr.pointee.event_id == MPV_EVENT_NONE {
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break
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}
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self.handleEvent(eventPtr.pointee)
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}
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}
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}
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private func handleEvent(_ event: mpv_event) {
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switch event.event_id {
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case MPV_EVENT_PROPERTY_CHANGE:
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guard let data = event.data else { break }
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let property = data.assumingMemoryBound(to: mpv_event_property.self).pointee
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let name = String(cString: property.name)
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handlePropertyChange(name: name, property: property)
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case MPV_EVENT_FILE_LOADED:
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "file-loaded", data: nil)
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}
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case MPV_EVENT_END_FILE:
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "end-file", data: nil)
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}
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case MPV_EVENT_SHUTDOWN:
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print("[MpvPlayerCore] MPV shutdown event")
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case MPV_EVENT_LOG_MESSAGE:
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if let msgPtr = event.data?.assumingMemoryBound(to: mpv_event_log_message.self) {
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let msg = msgPtr.pointee
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let prefix = msg.prefix.map { String(cString: $0) } ?? ""
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let level = msg.level.map { String(cString: $0) } ?? ""
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let text = msg.text.map { String(cString: $0) } ?? ""
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "log-message", data: [
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"prefix": prefix,
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"level": level,
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"text": text
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])
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}
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}
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default:
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break
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}
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}
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private func handlePropertyChange(name: String, property: mpv_event_property) {
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var value: Any?
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switch property.format {
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case MPV_FORMAT_DOUBLE:
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if let ptr = property.data {
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value = ptr.assumingMemoryBound(to: Double.self).pointee
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}
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case MPV_FORMAT_FLAG:
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if let ptr = property.data {
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value = ptr.assumingMemoryBound(to: Int32.self).pointee != 0
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}
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case MPV_FORMAT_NODE:
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if let ptr = property.data {
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let node = ptr.assumingMemoryBound(to: mpv_node.self).pointee
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value = convertNode(node)
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}
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case MPV_FORMAT_STRING:
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if let ptr = property.data {
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let cstr = ptr.assumingMemoryBound(to: UnsafePointer<CChar>?.self).pointee
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value = cstr.map { String(cString: $0) }
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}
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default:
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break
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}
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// Handle sig-peak for HDR/EDR activation
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if name == "video-params/sig-peak", let sigPeak = value as? Double {
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lastSigPeak = sigPeak
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DispatchQueue.main.async {
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self.updateEDRMode(sigPeak: sigPeak)
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}
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}
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DispatchQueue.main.async {
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self.delegate?.onPropertyChange(name: name, value: value)
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}
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}
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// MARK: - HDR/EDR Support
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private func updateEDRMode(sigPeak: Double) {
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guard let layer = metalLayer else { return }
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// Check if screen supports EDR (iOS 16+)
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var edrHeadroom: CGFloat = 1.0
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if #available(iOS 16.0, *) {
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edrHeadroom = containerView?.window?.screen.potentialEDRHeadroom ?? 1.0
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}
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let isHDRContent = sigPeak > 1.0
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let screenSupportsEDR = edrHeadroom > 1.0
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let shouldEnableEDR = hdrEnabled && isHDRContent && screenSupportsEDR
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if #available(iOS 16.0, *) {
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layer.wantsExtendedDynamicRangeContent = shouldEnableEDR
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}
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print(
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"[MpvPlayerCore] EDR mode: \(shouldEnableEDR) (hdrEnabled: \(hdrEnabled), sigPeak: \(sigPeak), headroom: \(edrHeadroom))"
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)
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}
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private func convertNode(_ node: mpv_node) -> Any? {
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switch node.format {
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case MPV_FORMAT_STRING:
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return node.u.string.map { String(cString: $0) }
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case MPV_FORMAT_FLAG:
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return node.u.flag != 0
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case MPV_FORMAT_INT64:
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return node.u.int64
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case MPV_FORMAT_DOUBLE:
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return node.u.double_
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case MPV_FORMAT_NODE_ARRAY:
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guard let list = node.u.list?.pointee else { return nil }
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var array = [Any]()
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for i in 0..<Int(list.num) {
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if let item = convertNode(list.values[i]) {
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array.append(item)
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}
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}
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return array
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case MPV_FORMAT_NODE_MAP:
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guard let list = node.u.list?.pointee else { return nil }
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var dict = [String: Any]()
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for i in 0..<Int(list.num) {
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if let key = list.keys?[i].map({ String(cString: $0) }),
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let val = convertNode(list.values[i])
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{
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dict[key] = val
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}
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}
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return dict
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default:
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return nil
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}
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}
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private func checkError(_ status: CInt) {
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if status < 0 {
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print("[MpvPlayerCore] MPV error: \(String(cString: mpv_error_string(status)))")
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}
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}
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// MARK: - Cleanup
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func dispose() {
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NotificationCenter.default.removeObserver(self)
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let mpvHandle = mpv
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mpv = nil
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queue.sync {
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if let handle = mpvHandle {
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mpv_set_wakeup_callback(handle, nil, nil)
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mpv_terminate_destroy(handle)
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}
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}
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metalLayer?.removeFromSuperlayer()
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metalLayer = nil
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containerView?.removeFromSuperview()
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containerView = nil
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isInitialized = false
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print("[MpvPlayerCore] Disposed")
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}
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deinit {
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dispose()
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}
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}
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