123 lines
3.5 KiB
C#
123 lines
3.5 KiB
C#
using LibVLCSharp.Shared;
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namespace DualScreenDemo.Services
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{
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public class MediaService : IDisposable
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{
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private readonly LibVLC _libVLC;
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private readonly MediaPlayer _mediaPlayer;
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private Media? _media;
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private bool _disposed;
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public MediaService(nint handle)
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{
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Core.Initialize();
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_libVLC = new LibVLC(
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"--network-caching=300",
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"--file-caching=300",
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"--audio-time-stretch",
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"--video-filter=clone",
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$"--clone-views={handle}" // 這是 clone 的目標視窗
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);
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_mediaPlayer = new MediaPlayer(_libVLC);
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}
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#region Player Setup
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public void SetVideoOutput(nint handle, int width, int height)
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{
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_mediaPlayer.Hwnd = handle;
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_mediaPlayer.AspectRatio = $"{width}:{height}";
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_mediaPlayer.Scale = 0;
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}
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#endregion
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#region Playback
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public MediaPlayer Player => _mediaPlayer;
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public bool IsPlaying => _mediaPlayer.IsPlaying;
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public bool IsAtEnd()
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{
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var duration = _mediaPlayer.Media?.Duration ?? 0;
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var time = _mediaPlayer.Time;
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return duration > 0 && Math.Abs(duration - time) < 1000;
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}
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public void LoadMedia(string filePath, int audioTrackIndex = 0)
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{
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_mediaPlayer.Stop();
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_media?.Dispose();
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_media = new Media(_libVLC, filePath, FromType.FromPath);
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_media.AddOption($":audio-track={audioTrackIndex}");
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}
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public void Play()
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{
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if (_media == null) return;
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_mediaPlayer.Play(_media);
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}
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public void Pause() => _mediaPlayer.Pause();
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public void Stop() => _mediaPlayer.Stop();
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#endregion
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#region Audio
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public List<TrackDescription> GetAudioTracks()
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{
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var result = new List<TrackDescription>();
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var media = _mediaPlayer.Media;
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if (media == null) return result;
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if (!media.IsParsed)
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media.Parse(MediaParseOptions.ParseLocal);
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var tracks = media.Tracks;
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if (tracks == null) return result;
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foreach (var track in tracks.Where(t => t.TrackType == TrackType.Audio))
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{
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result.Add(new TrackDescription
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{
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Id = track.Id,
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Name = !string.IsNullOrEmpty(track.Language) ? track.Language : $"Audio Track {track.Id}"
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});
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}
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return result;
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}
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public void SetAudioTrack(int trackIndex)
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{
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var audioTracks = GetAudioTracks();
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if (trackIndex < 0 || trackIndex >= audioTracks.Count) return;
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_mediaPlayer.SetAudioTrack(audioTracks[trackIndex].Id);
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}
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#endregion
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#region Volume
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public void SetVolume(int volume) => _mediaPlayer.Volume = volume;
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public int GetVolume() => _mediaPlayer.Volume;
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public bool Mute(bool isMuted) => _mediaPlayer.Mute = isMuted;
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#endregion
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#region Dispose
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public void Dispose()
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{
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if (_disposed) return;
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_mediaPlayer.Dispose();
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_media?.Dispose();
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_libVLC.Dispose();
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_media = null;
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_disposed = true;
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}
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#endregion
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}
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public class TrackDescription
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{
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public int Id { get; set; }
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public string Name { get; set; } = string.Empty;
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}
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} |