2021-05-20 15:28:18 -04:00
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#nullable disable
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2020-02-06 09:20:23 -05:00
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#pragma warning disable CS1591
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2019-01-13 14:54:44 -05:00
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using System;
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2019-02-28 17:22:57 -05:00
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using System.Globalization;
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2017-09-28 13:02:49 -04:00
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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2019-11-08 06:49:00 -05:00
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Model.Dto;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.LiveTv;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.LiveTv.TunerHosts
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{
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public class LiveStream : ILiveStream
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{
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private readonly IConfigurationManager _configurationManager;
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public LiveStream(
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MediaSourceInfo mediaSource,
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TunerHostInfo tuner,
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IFileSystem fileSystem,
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ILogger logger,
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IConfigurationManager configurationManager,
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IStreamHelper streamHelper)
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{
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OriginalMediaSource = mediaSource;
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FileSystem = fileSystem;
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MediaSource = mediaSource;
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Logger = logger;
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EnableStreamSharing = true;
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UniqueId = Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
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if (tuner is not null)
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{
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TunerHostId = tuner.Id;
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}
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_configurationManager = configurationManager;
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StreamHelper = streamHelper;
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ConsumerCount = 1;
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SetTempFilePath("ts");
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}
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protected IFileSystem FileSystem { get; }
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protected IStreamHelper StreamHelper { get; }
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protected ILogger Logger { get; }
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protected CancellationTokenSource LiveStreamCancellationTokenSource { get; } = new CancellationTokenSource();
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protected string TempFilePath { get; set; }
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public MediaSourceInfo OriginalMediaSource { get; set; }
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public MediaSourceInfo MediaSource { get; set; }
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public int ConsumerCount { get; set; }
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public string OriginalStreamId { get; set; }
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public bool EnableStreamSharing { get; set; }
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public string UniqueId { get; }
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public string TunerHostId { get; }
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public DateTime DateOpened { get; protected set; }
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protected void SetTempFilePath(string extension)
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{
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TempFilePath = Path.Combine(_configurationManager.GetTranscodePath(), UniqueId + "." + extension);
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}
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public virtual Task Open(CancellationToken openCancellationToken)
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{
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DateOpened = DateTime.UtcNow;
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return Task.CompletedTask;
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}
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public Task Close()
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{
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EnableStreamSharing = false;
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Logger.LogInformation("Closing {Type}", GetType().Name);
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LiveStreamCancellationTokenSource.Cancel();
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return Task.CompletedTask;
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}
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public Stream GetStream()
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{
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var stream = new FileStream(
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TempFilePath,
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FileMode.Open,
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FileAccess.Read,
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FileShare.ReadWrite,
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IODefaults.FileStreamBufferSize,
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FileOptions.SequentialScan | FileOptions.Asynchronous);
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bool seekFile = (DateTime.UtcNow - DateOpened).TotalSeconds > 10;
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if (seekFile)
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{
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TrySeek(stream, -20000);
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}
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return stream;
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}
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protected async Task DeleteTempFiles(string path, int retryCount = 0)
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{
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if (retryCount == 0)
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{
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Logger.LogInformation("Deleting temp file {FilePath}", path);
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}
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try
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{
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FileSystem.DeleteFile(path);
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error deleting file {FilePath}", path);
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if (retryCount <= 40)
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{
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await Task.Delay(500).ConfigureAwait(false);
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await DeleteTempFiles(path, retryCount + 1).ConfigureAwait(false);
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}
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}
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}
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private void TrySeek(Stream stream, long offset)
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{
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if (!stream.CanSeek)
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{
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return;
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}
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try
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{
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stream.Seek(offset, SeekOrigin.End);
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}
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catch (IOException)
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{
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}
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catch (ArgumentException)
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{
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error seeking stream");
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}
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}
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}
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}
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