yattee/Model/Player/Backends/MPVClient.swift

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Swift
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import CoreMedia
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import Defaults
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import Foundation
import Logging
#if !os(macOS)
import Siesta
import UIKit
#endif
final class MPVClient: ObservableObject {
private var logger = Logger(label: "mpv-client")
var mpv: OpaquePointer!
var mpvGL: OpaquePointer!
var queue: DispatchQueue!
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#if os(macOS)
var layer: VideoLayer!
var link: CVDisplayLink!
#else
var glView: MPVOGLView!
#endif
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var backend: MPVBackend!
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var seeking = false
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func create(frame: CGRect? = nil) {
#if !os(macOS)
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if let frame = frame {
glView = MPVOGLView(frame: frame)
}
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#endif
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mpv = mpv_create()
if mpv == nil {
print("failed creating context\n")
exit(1)
}
#if DEBUG
checkError(mpv_request_log_messages(mpv, "debug"))
#else
checkError(mpv_request_log_messages(mpv, "warn"))
#endif
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#if os(macOS)
checkError(mpv_set_option_string(mpv, "input-media-keys", "yes"))
#endif
checkError(mpv_set_option_string(mpv, "cache-pause-initial", "yes"))
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checkError(mpv_set_option_string(mpv, "cache-secs", Defaults[.mpvCacheSecs]))
checkError(mpv_set_option_string(mpv, "cache-pause-wait", Defaults[.mpvCachePauseWait]))
checkError(mpv_set_option_string(mpv, "keep-open", "yes"))
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checkError(mpv_set_option_string(mpv, "hwdec", machine == "x86_64" ? "no" : "auto-safe"))
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checkError(mpv_set_option_string(mpv, "vo", "libmpv"))
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checkError(mpv_initialize(mpv))
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let api = UnsafeMutableRawPointer(mutating: (MPV_RENDER_API_TYPE_OPENGL as NSString).utf8String)
var initParams = mpv_opengl_init_params(
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get_proc_address: getProcAddress,
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get_proc_address_ctx: nil,
extra_exts: nil
)
queue = DispatchQueue(label: "mpv", qos: .userInteractive)
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withUnsafeMutablePointer(to: &initParams) { initParams in
var params = [
mpv_render_param(type: MPV_RENDER_PARAM_API_TYPE, data: api),
mpv_render_param(type: MPV_RENDER_PARAM_OPENGL_INIT_PARAMS, data: initParams),
mpv_render_param()
]
if mpv_render_context_create(&mpvGL, mpv, &params) < 0 {
puts("failed to initialize mpv GL context")
exit(1)
}
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#if os(macOS)
mpv_render_context_set_update_callback(
mpvGL,
glUpdate,
UnsafeMutableRawPointer(Unmanaged.passUnretained(layer).toOpaque())
)
#else
glView.mpvGL = UnsafeMutableRawPointer(mpvGL)
mpv_render_context_set_update_callback(
mpvGL,
glUpdate(_:),
UnsafeMutableRawPointer(Unmanaged.passUnretained(glView).toOpaque())
)
#endif
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}
queue!.async {
mpv_set_wakeup_callback(self.mpv, wakeUp, UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque()))
}
}
func readEvents() {
queue?.async { [self] in
while self.mpv != nil {
let event = mpv_wait_event(self.mpv, 0)
if event!.pointee.event_id == MPV_EVENT_NONE {
break
}
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backend?.handle(event)
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}
}
}
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func loadFile(_ url: URL, audio: URL? = nil, sub: URL? = nil, time: CMTime? = nil, completionHandler: ((Int32) -> Void)? = nil) {
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var args = [url.absoluteString]
var options = [String]()
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if let time = time {
args.append("replace")
options.append("start=\(Int(time.seconds))")
}
if let audioURL = audio?.absoluteString {
options.append("audio-files-append=\"\(audioURL)\"")
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}
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if let subURL = sub?.absoluteString {
options.append("sub-files-append=\"\(subURL)\"")
}
args.append(options.joined(separator: ","))
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command("loadfile", args: args, returnValueCallback: completionHandler)
}
func play() {
setFlagAsync("pause", false)
}
func pause() {
setFlagAsync("pause", true)
}
func togglePlay() {
command("cycle", args: ["pause"])
}
func stop() {
command("stop")
}
var currentTime: CMTime {
CMTime.secondsInDefaultTimescale(mpv.isNil ? -1 : getDouble("time-pos"))
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}
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var frameDropCount: Int {
mpv.isNil ? 0 : getInt("frame-drop-count")
}
var outputFps: Double {
mpv.isNil ? 0.0 : getDouble("estimated-vf-fps")
}
var hwDecoder: String {
mpv.isNil ? "unknown" : (getString("hwdec-current") ?? "unknown")
}
var bufferingState: Double {
mpv.isNil ? 0.0 : getDouble("cache-buffering-state")
}
var cacheDuration: Double {
mpv.isNil ? 0.0 : getDouble("demuxer-cache-duration")
}
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var duration: CMTime {
CMTime.secondsInDefaultTimescale(mpv.isNil ? -1 : getDouble("duration"))
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}
var pausedForCache: Bool {
mpv.isNil ? false : getFlag("paused-for-cache")
}
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var eofReached: Bool {
mpv.isNil ? false : getFlag("eof-reached")
}
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func seek(relative time: CMTime, completionHandler: ((Bool) -> Void)? = nil) {
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guard !seeking else {
logger.warning("ignoring seek, another in progress")
return
}
seeking = true
command("seek", args: [String(time.seconds)]) { [weak self] _ in
self?.seeking = false
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completionHandler?(true)
}
}
func seek(to time: CMTime, completionHandler: ((Bool) -> Void)? = nil) {
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guard !seeking else {
logger.warning("ignoring seek, another in progress")
return
}
seeking = true
command("seek", args: [String(time.seconds), "absolute"]) { [weak self] _ in
self?.seeking = false
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completionHandler?(true)
}
}
func setSize(_ width: Double, _ height: Double) {
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let roundedWidth = width.rounded()
let roundedHeight = height.rounded()
guard width > 0, height > 0 else {
return
}
logger.info("setting player size to \(roundedWidth),\(roundedHeight)")
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#if !os(macOS)
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guard roundedWidth <= UIScreen.main.bounds.width, roundedHeight <= UIScreen.main.bounds.height else {
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logger.info("requested size is greater than screen size, ignoring")
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logger.info("width: \(roundedWidth) <= \(UIScreen.main.bounds.width)")
logger.info("height: \(roundedHeight) <= \(UIScreen.main.bounds.height)")
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return
}
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glView?.frame = CGRect(x: 0, y: 0, width: roundedWidth, height: roundedHeight)
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#endif
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}
func setNeedsDrawing(_ needsDrawing: Bool) {
logger.info("needs drawing: \(needsDrawing)")
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#if !os(macOS)
glView.needsDrawing = needsDrawing
#endif
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}
func command(
_ command: String,
args: [String?] = [],
checkForErrors: Bool = true,
returnValueCallback: ((Int32) -> Void)? = nil
) {
guard mpv != nil else {
return
}
var cargs = makeCArgs(command, args).map { $0.flatMap { UnsafePointer<CChar>(strdup($0)) } }
defer {
for ptr in cargs where ptr != nil {
free(UnsafeMutablePointer(mutating: ptr!))
}
}
logger.info("\(command) -- \(args)")
let returnValue = mpv_command(mpv, &cargs)
if checkForErrors {
checkError(returnValue)
}
if let cb = returnValueCallback {
cb(returnValue)
}
}
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func addVideoTrack(_ url: URL) {
command("video-add", args: [url.absoluteString])
}
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func addSubTrack(_ url: URL) {
command("sub-add", args: [url.absoluteString])
}
func removeSubs() {
command("sub-remove")
}
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func setVideoToAuto() {
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setString("video", "1")
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}
func setVideoToNo() {
setString("video", "no")
}
var tracksCount: Int {
Int(getString("track-list/count") ?? "-1") ?? -1
}
private func getFlag(_ name: String) -> Bool {
var data = Int64()
mpv_get_property(mpv, name, MPV_FORMAT_FLAG, &data)
return data > 0
}
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private func setFlagAsync(_ name: String, _ flag: Bool) {
var data: Int = flag ? 1 : 0
mpv_set_property_async(mpv, 0, name, MPV_FORMAT_FLAG, &data)
}
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func setDoubleAsync(_ name: String, _ value: Double) {
var data = value
mpv_set_property_async(mpv, 0, name, MPV_FORMAT_DOUBLE, &data)
}
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private func getDouble(_ name: String) -> Double {
var data = Double()
mpv_get_property(mpv, name, MPV_FORMAT_DOUBLE, &data)
return data
}
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private func getInt(_ name: String) -> Int {
var data = Int64()
mpv_get_property(mpv, name, MPV_FORMAT_INT64, &data)
return Int(data)
}
func getString(_ name: String) -> String? {
let cstr = mpv_get_property_string(mpv, name)
let str: String? = cstr == nil ? nil : String(cString: cstr!)
mpv_free(cstr)
return str
}
private func setString(_ name: String, _ value: String) {
mpv_set_property_string(mpv, name, value)
}
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private func makeCArgs(_ command: String, _ args: [String?]) -> [String?] {
if !args.isEmpty, args.last == nil {
fatalError("Command do not need a nil suffix")
}
var strArgs = args
strArgs.insert(command, at: 0)
strArgs.append(nil)
return strArgs
}
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private func checkError(_ status: CInt) {
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if status < 0 {
logger.error(.init(stringLiteral: "MPV API error: \(String(cString: mpv_error_string(status)))\n"))
}
}
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private var machine: String {
var systeminfo = utsname()
uname(&systeminfo)
return withUnsafeBytes(of: &systeminfo.machine) { bufPtr -> String in
let data = Data(bufPtr)
if let lastIndex = data.lastIndex(where: { $0 != 0 }) {
return String(data: data[0 ... lastIndex], encoding: .isoLatin1)!
} else {
return String(data: data, encoding: .isoLatin1)!
}
}
}
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}
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#if os(macOS)
func getProcAddress(_: UnsafeMutableRawPointer?, _ name: UnsafePointer<Int8>?) -> UnsafeMutableRawPointer? {
let symbolName = CFStringCreateWithCString(kCFAllocatorDefault, name, CFStringBuiltInEncodings.ASCII.rawValue)
let identifier = CFBundleGetBundleWithIdentifier("com.apple.opengl" as CFString)
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return CFBundleGetFunctionPointerForName(identifier, symbolName)
}
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func glUpdate(_ ctx: UnsafeMutableRawPointer?) {
let videoLayer = unsafeBitCast(ctx, to: VideoLayer.self)
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videoLayer.client?.queue?.async {
if !videoLayer.isAsynchronous {
videoLayer.display()
}
}
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}
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#else
func getProcAddress(_: UnsafeMutableRawPointer?, _ name: UnsafePointer<Int8>?) -> UnsafeMutableRawPointer? {
let symbolName = CFStringCreateWithCString(kCFAllocatorDefault, name, CFStringBuiltInEncodings.ASCII.rawValue)
let identifier = CFBundleGetBundleWithIdentifier("com.apple.opengles" as CFString)
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return CFBundleGetFunctionPointerForName(identifier, symbolName)
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}
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private func glUpdate(_ ctx: UnsafeMutableRawPointer?) {
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#if targetEnvironment(simulator)
// performance of drawing in simulator is poor and buggy, disable it
return
#endif
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let glView = unsafeBitCast(ctx, to: MPVOGLView.self)
guard glView.needsDrawing else {
return
}
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glView.queue.async {
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glView.display()
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}
}
#endif
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private func wakeUp(_ context: UnsafeMutableRawPointer?) {
let client = unsafeBitCast(context, to: MPVClient.self)
client.readEvents()
}