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marcusziade

llama 3 70B sample

May 13th, 2024
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Swift 6.14 KB | None | 0 0
  1.  
  2. import UIKit
  3. import AVFoundation
  4.  
  5. class VideoPlayerViewController: UIViewController {
  6.     // Video player view
  7.     let playerView = UIView()
  8.  
  9.     // AVPlayer instance
  10.     var player: AVPlayer?
  11.  
  12.     // Video URL
  13.     var videoURL: URL?
  14.  
  15.     // Buttons and controls
  16.     let playPauseButton = UIButton(type: .system)
  17.     let stopButton = UIButton(type: .system)
  18.     let rewindButton = UIButton(type: .system)
  19.     let fastForwardButton = UIButton(type: .system)
  20.     let volumeSlider = UISlider()
  21.     let timeLabel = UILabel()
  22.     let currentTimeLabel = UILabel()
  23.  
  24.     // Video playback state
  25.     var isPlaying = false
  26.  
  27.     override func viewDidLoad() {
  28.         super.viewDidLoad()
  29.  
  30.         // Set up player view
  31.         playerView.translatesAutoresizingMaskIntoConstraints = false
  32.         view.addSubview(playerView)
  33.         NSLayoutConstraint.activate([
  34.             playerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
  35.             playerView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
  36.             playerView.topAnchor.constraint(equalTo: view.topAnchor),
  37.             playerView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
  38.         ])
  39.  
  40.         // Set up buttons and controls
  41.         playPauseButton.setTitle("Play", for: .normal)
  42.         playPauseButton.addTarget(self, action: #selector(playPauseButtonTapped), for: .touchUpInside)
  43.         stopButton.setTitle("Stop", for: .normal)
  44.         stopButton.addTarget(self, action: #selector(stopButtonTapped), for: .touchUpInside)
  45.         rewindButton.setTitle("Rewind", for: .normal)
  46.         rewindButton.addTarget(self, action: #selector(rewindButtonTapped), for: .touchUpInside)
  47.         fastForwardButton.setTitle("Fast Forward", for: .normal)
  48.         fastForwardButton.addTarget(self, action: #selector(fastForwardButtonTapped), for:
  49. .touchUpInside)
  50.  
  51.         volumeSlider.minimumValue = 0
  52.         volumeSlider.maximumValue = 1
  53.         volumeSlider.value = 0.5
  54.         volumeSlider.addTarget(self, action: #selector(volumeSliderValueChanged), for: .valueChanged)
  55.  
  56.         timeLabel.text = "00:00"
  57.         currentTimeLabel.text = "00:00"
  58.  
  59.         // Add buttons and controls to the view
  60.         let buttonStackView = UIStackView(arrangedSubviews: [playPauseButton, stopButton, rewindButton,
  61. fastForwardButton])
  62.         buttonStackView.axis = .horizontal
  63.         buttonStackView.distribution = .fillEqually
  64.         buttonStackView.spacing = 10
  65.  
  66.         let controlStackView = UIStackView(arrangedSubviews: [volumeSlider, timeLabel,
  67. currentTimeLabel])
  68.         controlStackView.axis = .vertical
  69.         controlStackView.distribution = .fillProportionally
  70.         controlStackView.spacing = 10
  71.  
  72.         view.addSubview(buttonStackView)
  73.         view.addSubview(controlStackView)
  74.  
  75.         NSLayoutConstraint.activate([
  76.             buttonStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
  77.             buttonStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
  78.             buttonStackView.topAnchor.constraint(equalTo: playerView.bottomAnchor, constant: 20),
  79.  
  80.             controlStackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
  81.             controlStackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
  82.             controlStackView.topAnchor.constraint(equalTo: buttonStackView.bottomAnchor, constant: 10)
  83.         ])
  84.     }
  85.  
  86.     // Play/pause button tapped
  87.     @objc func playPauseButtonTapped() {
  88.         if isPlaying {
  89.             player?.pause()
  90.             playPauseButton.setTitle("Play", for: .normal)
  91.             isPlaying = false
  92.         } else {
  93.             player?.play()
  94.             playPauseButton.setTitle("Pause", for: .normal)
  95.             isPlaying = true
  96.         }
  97.     }
  98.  
  99.     // Stop button tapped
  100.     @objc func stopButtonTapped() {
  101.         player?.stop()
  102.         player?.seek(to: CMTime.zero)
  103.         currentTimeLabel.text = "00:00"
  104.         isPlaying = false
  105.     }
  106.  
  107.     // Rewind button tapped
  108.     @objc func rewindButtonTapped() {
  109.         guard let player = player else { return }
  110.         let currentTime = player.currentTime()
  111.         let newTime = currentTime - 10
  112.         if newTime < 0 {
  113.             player.seek(to: CMTime.zero)
  114.         } else {
  115.             player.seek(to: newTime)
  116.         }
  117.     }
  118.  
  119.     // Fast forward button tapped
  120.     @objc func fastForwardButtonTapped() {
  121.         guard let player = player else { return }
  122.         let currentTime = player.currentTime()
  123.         let duration = player.currentItem?.duration
  124.         let newTime = min(currentTime + 10, duration)
  125.         player.seek(to: newTime)
  126.     }
  127.  
  128.     // Volume slider value changed
  129.     @objc func volumeSliderValueChanged() {
  130.         guard let player = player else { return }
  131.         player.volume = volumeSlider.value
  132.     }
  133.  
  134.     // Set up video playback
  135.     func setupVideoPlayback(url: URL) {
  136.         videoURL = url
  137.         player = AVPlayer(url: videoURL)
  138.  
  139.         // Create a player layer and add it to the player view
  140.         let playerLayer = AVPlayerLayer(player: player)
  141.         playerLayer.frame = playerView.bounds
  142.         playerView.layer.addSublayer(playerLayer)
  143.  
  144.         // Add observers for playback state changes
  145.         NotificationCenter.default.addObserver(self, selector: #selector(playbackStateChanged), name:
  146. .AVPlayerItemDidPlayToEndTime, object: player?.currentItem)
  147.     }
  148.  
  149.     // Playback state changed (e.g. video ended)
  150.     @objc func playbackStateChanged() {
  151.         stopButtonTapped()
  152.     }
  153. }
  154.  
  155. This `UIViewController` has the following features:
  156.  
  157. * A `UIView` to display the video
  158. * An `AVPlayer` instance to play the video
  159. * Buttons for playing/pausing, stopping, rewinding, and fast forwarding
  160. * A volume slider to control the audio level
  161. * Labels to display the current time and duration of the video
  162.  
  163. To use this view controller, simply create an instance of it and call the `setupVideoPlayback` method
  164. with a valid `URL` for the video. For example:
  165. ```swift
  166. let videoViewController = VideoPlayerViewController()
  167. videoViewController.setupVideoPlayback(url: URL(string: "https://example.com/video.mp4")!)
  168. ```
  169. Note that this is just an example implementation, and you may want to customize it to fit your specific
  170. needs (e.g. add error handling, display video thumbnails, etc.).
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