/
ViewController.swift
279 lines (238 loc) · 9.01 KB
/
ViewController.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
import UIKit
import MediaPlayer
import AVFoundation
import CoreMedia
import AVKit
extension CGRect {
init(_ x:CGFloat, _ y:CGFloat, _ w:CGFloat, _ h:CGFloat) {
self.init(x:x, y:y, width:w, height:h)
}
}
extension CGSize {
init(_ width:CGFloat, _ height:CGFloat) {
self.init(width:width, height:height)
}
}
extension CGPoint {
init(_ x:CGFloat, _ y:CGFloat) {
self.init(x:x, y:y)
}
}
extension CGVector {
init (_ dx:CGFloat, _ dy:CGFloat) {
self.init(dx:dx, dy:dy)
}
}
protocol PlayerPauser {
var playing : Bool {get}
func doPlay()
func pause()
}
extension AVAudioPlayer : PlayerPauser {
func doPlay() {
self.play()
}
}
extension AVPlayer : PlayerPauser {
var playing : Bool {
return self.rate > 0.1
}
func doPlay() {
self.play()
}
}
class ViewController: UIViewController {
var player = Player()
var avplayer : AVPlayer!
var qp : AVQueuePlayer!
var items = [AVPlayerItem]()
var ob : Any!
@IBOutlet var prog : UIProgressView!
@IBOutlet var label : UILabel!
var curnum = 0
var total = 0
var curplayer : PlayerPauser!
override var prefersStatusBarHidden : Bool {
return true
}
func oneSong () -> URL? {
let query = MPMediaQuery.songs()
// always need to filter out songs that aren't present
let isPresent = MPMediaPropertyPredicate(value:false,
forProperty:MPMediaItemPropertyIsCloudItem,
comparisonType:.equalTo)
query.addFilterPredicate(isPresent)
return query.items?[0].assetURL
}
@IBAction func doPlayOneSongAVAudioPlayer (_ sender: Any!) {
self.curplayer?.pause()
if let url = self.oneSong() {
self.player.playFile(at:url)
self.curplayer = self.player.player
}
}
@IBAction func doPlayOneSongAVPlayer (_ sender: Any!) {
self.curplayer?.pause()
if let url = self.oneSong() {
self.avplayer = AVPlayer(url:url)
self.avplayer.play()
self.curplayer = self.avplayer
}
}
@IBAction func doPlayOneSongAVKit(_ sender: Any) {
self.curplayer?.pause()
guard let url = self.oneSong() else {return}
let p = AVPlayer(url:url)
let vc = AVPlayerViewController()
vc.player = p
vc.view.frame = CGRect(20,-5,250,80) // no smaller height or we get constraint issues
vc.view.backgroundColor = .clear
// cover the black QuickTime background, heh heh
let v = UIView()
v.translatesAutoresizingMaskIntoConstraints = false
v.backgroundColor = .white
vc.contentOverlayView!.addSubview(v)
let c : [NSLayoutConstraint] = [
v.leadingAnchor.constraint(equalTo:v.superview!.leadingAnchor),
v.trailingAnchor.constraint(equalTo:v.superview!.trailingAnchor),
v.topAnchor.constraint(equalTo:v.superview!.topAnchor),
v.bottomAnchor.constraint(equalTo:v.superview!.bottomAnchor),
]
NSLayoutConstraint.activate(c)
let v2 = UIView()
v2.translatesAutoresizingMaskIntoConstraints = false
v2.backgroundColor = .black
vc.contentOverlayView!.addSubview(v2)
let c2 : [NSLayoutConstraint] = [
v2.leadingAnchor.constraint(equalTo:v2.superview!.leadingAnchor),
v2.trailingAnchor.constraint(equalTo:v2.superview!.trailingAnchor),
v2.heightAnchor.constraint(equalToConstant:44),
v2.bottomAnchor.constraint(equalTo:v2.superview!.bottomAnchor),
]
NSLayoutConstraint.activate(c2)
self.addChildViewController(vc)
self.view.addSubview(vc.view)
vc.didMove(toParentViewController: self)
p.play()
self.curplayer = p
}
@IBAction func doPlayShortSongs (_ sender: Any!) {
self.curplayer?.pause()
let query = MPMediaQuery.songs()
// always need to filter out songs that aren't present
let isPresent = MPMediaPropertyPredicate(value:false,
forProperty:MPMediaItemPropertyIsCloudItem,
comparisonType:.equalTo)
query.addFilterPredicate(isPresent)
guard let items = query.items else {return}
let shorties = items.filter {
let dur = $0.playbackDuration
return dur < 30
}
guard shorties.count > 0 else {
print("no songs that short!")
return
}
self.items = shorties.map {
let url = $0.assetURL!
let asset = AVAsset(url:url)
return AVPlayerItem(
asset: asset, automaticallyLoadedAssetKeys: [#keyPath(AVAsset.duration)])
// duration needed later; this way, queue player will load it for us up front
}
self.curnum = 0
self.total = self.items.count
if self.ob != nil && self.qp != nil {
self.qp.removeTimeObserver(self.ob)
}
let seed = min(3,self.items.count)
self.qp = AVQueuePlayer(items:Array(self.items.prefix(upTo:seed)))
self.items = Array(self.items.suffix(from:seed))
// use .Initial option so that we get an observation for the first item
self.qp.addObserver(self, forKeyPath:#keyPath(AVQueuePlayer.currentItem), options:.initial, context:nil)
self.qp.play()
self.curplayer = self.qp
UIApplication.shared.beginReceivingRemoteControlEvents()
self.ob = self.qp.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(0.5, 600), queue: nil, using: self.timerFired)
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath == #keyPath(AVQueuePlayer.currentItem) {
self.changed()
}
}
func changed() {
guard let item = self.qp.currentItem else {return}
self.curnum += 1
var arr = item.asset.commonMetadata
arr = AVMetadataItem.metadataItems(from:arr,
withKey:AVMetadataCommonKeyTitle,
keySpace:AVMetadataKeySpaceCommon)
let met = arr[0]
let valueKey = #keyPath(AVMetadataItem.value)
met.loadValuesAsynchronously(forKeys:[valueKey]) {
// should always check for successful load of value
if met.statusOfValue(forKey:valueKey, error: nil) == .loaded {
// can't be sure what thread we're on ...
// ...or whether we'll be called back synchronously or asynchronously
// so I like to step out to the main thread just in case
guard let title = met.value as? String else {return}
DispatchQueue.main.async {
self.label.text = "\(self.curnum) of \(self.total): \(title)"
MPNowPlayingInfoCenter.default().nowPlayingInfo = [
MPMediaItemPropertyTitle: title
]
}
}
}
guard self.items.count > 0 else {return}
let newItem = self.items.removeFirst()
self.qp.insert(newItem, after:nil) // means "at end"
}
func timerFired(time:CMTime) {
if let item = self.qp.currentItem {
let asset = item.asset
if asset.statusOfValue(forKey:#keyPath(AVAsset.duration), error: nil) == .loaded {
let dur = asset.duration
self.prog.setProgress(Float(time.seconds/dur.seconds), animated: false)
self.prog.isHidden = false
}
} else {
// none of this is executed; I need a way of learning when we are completely done
// or else I can just forget this feature
self.label.text = ""
self.prog.isHidden = true
self.qp.removeTimeObserver(self.ob)
self.ob = nil
print("removing observer")
}
}
// ======== respond to remote controls
override func viewDidLoad() {
super.viewDidLoad()
let scc = MPRemoteCommandCenter.shared()
scc.togglePlayPauseCommand.addTarget(self, action: #selector(doPlayPause))
scc.playCommand.addTarget(self, action:#selector(doPlay))
scc.pauseCommand.addTarget(self, action:#selector(doPause))
}
func doPlayPause(_ event:MPRemoteCommandEvent) {
print("playpause")
let p = self.player.player!
if p.isPlaying { p.pause() } else { p.play() }
}
func doPlay(_ event:MPRemoteCommandEvent) {
print("play")
let p = self.player.player!
p.play()
}
func doPause(_ event:MPRemoteCommandEvent) {
print("pause")
let p = self.player.player!
p.pause()
}
deinit {
let scc = MPRemoteCommandCenter.shared()
scc.togglePlayPauseCommand.removeTarget(self)
scc.playCommand.removeTarget(self)
scc.pauseCommand.removeTarget(self)
}
}