mirror of
https://github.com/jellyfin/jellyfin.git
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234 lines
8.7 KiB
C#
234 lines
8.7 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.LiveTv;
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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.Caching.Memory;
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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 abstract class BaseTunerHost
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{
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protected readonly IServerConfigurationManager Config;
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protected readonly ILogger<BaseTunerHost> Logger;
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protected readonly IFileSystem FileSystem;
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private readonly IMemoryCache _memoryCache;
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protected BaseTunerHost(IServerConfigurationManager config, ILogger<BaseTunerHost> logger, IFileSystem fileSystem, IMemoryCache memoryCache)
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{
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Config = config;
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Logger = logger;
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_memoryCache = memoryCache;
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FileSystem = fileSystem;
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}
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public virtual bool IsSupported => true;
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protected abstract Task<List<ChannelInfo>> GetChannelsInternal(TunerHostInfo tuner, CancellationToken cancellationToken);
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public abstract string Type { get; }
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public async Task<List<ChannelInfo>> GetChannels(TunerHostInfo tuner, bool enableCache, CancellationToken cancellationToken)
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{
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var key = tuner.Id;
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if (enableCache && !string.IsNullOrEmpty(key) && _memoryCache.TryGetValue(key, out List<ChannelInfo> cache))
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{
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return cache;
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}
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var list = await GetChannelsInternal(tuner, cancellationToken).ConfigureAwait(false);
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// logger.LogInformation("Channels from {0}: {1}", tuner.Url, JsonSerializer.SerializeToString(list));
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if (!string.IsNullOrEmpty(key) && list.Count > 0)
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{
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_memoryCache.Set(key, list);
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}
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return list;
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}
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protected virtual List<TunerHostInfo> GetTunerHosts()
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{
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return GetConfiguration().TunerHosts
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.Where(i => string.Equals(i.Type, Type, StringComparison.OrdinalIgnoreCase))
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.ToList();
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}
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public async Task<List<ChannelInfo>> GetChannels(bool enableCache, CancellationToken cancellationToken)
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{
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var list = new List<ChannelInfo>();
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var hosts = GetTunerHosts();
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foreach (var host in hosts)
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{
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var channelCacheFile = Path.Combine(Config.ApplicationPaths.CachePath, host.Id + "_channels");
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try
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{
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var channels = await GetChannels(host, enableCache, cancellationToken).ConfigureAwait(false);
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var newChannels = channels.Where(i => !list.Any(l => string.Equals(i.Id, l.Id, StringComparison.OrdinalIgnoreCase))).ToList();
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list.AddRange(newChannels);
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if (!enableCache)
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{
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try
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{
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Directory.CreateDirectory(Path.GetDirectoryName(channelCacheFile));
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await using var writeStream = File.OpenWrite(channelCacheFile);
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await JsonSerializer.SerializeAsync(writeStream, channels, cancellationToken: cancellationToken).ConfigureAwait(false);
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}
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catch (IOException)
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{
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}
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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 getting channel list");
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if (enableCache)
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{
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try
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{
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await using var readStream = File.OpenRead(channelCacheFile);
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var channels = await JsonSerializer.DeserializeAsync<List<ChannelInfo>>(readStream, cancellationToken: cancellationToken)
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.ConfigureAwait(false);
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list.AddRange(channels);
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}
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catch (IOException)
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{
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}
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}
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}
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}
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return list;
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}
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protected abstract Task<List<MediaSourceInfo>> GetChannelStreamMediaSources(TunerHostInfo tuner, ChannelInfo channel, CancellationToken cancellationToken);
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public async Task<List<MediaSourceInfo>> GetChannelStreamMediaSources(string channelId, CancellationToken cancellationToken)
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{
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if (string.IsNullOrEmpty(channelId))
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{
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throw new ArgumentNullException(nameof(channelId));
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}
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if (IsValidChannelId(channelId))
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{
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var hosts = GetTunerHosts();
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foreach (var host in hosts)
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{
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try
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{
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var channels = await GetChannels(host, true, cancellationToken).ConfigureAwait(false);
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var channelInfo = channels.FirstOrDefault(i => string.Equals(i.Id, channelId, StringComparison.OrdinalIgnoreCase));
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if (channelInfo != null)
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{
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return await GetChannelStreamMediaSources(host, channelInfo, cancellationToken).ConfigureAwait(false);
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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 getting channels");
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}
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}
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}
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return new List<MediaSourceInfo>();
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}
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protected abstract Task<ILiveStream> GetChannelStream(TunerHostInfo tuner, ChannelInfo channel, string streamId, List<ILiveStream> currentLiveStreams, CancellationToken cancellationToken);
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public async Task<ILiveStream> GetChannelStream(string channelId, string streamId, List<ILiveStream> currentLiveStreams, CancellationToken cancellationToken)
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{
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if (string.IsNullOrEmpty(channelId))
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{
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throw new ArgumentNullException(nameof(channelId));
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}
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if (!IsValidChannelId(channelId))
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{
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throw new FileNotFoundException();
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}
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var hosts = GetTunerHosts();
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var hostsWithChannel = new List<Tuple<TunerHostInfo, ChannelInfo>>();
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foreach (var host in hosts)
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{
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try
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{
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var channels = await GetChannels(host, true, cancellationToken).ConfigureAwait(false);
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var channelInfo = channels.FirstOrDefault(i => string.Equals(i.Id, channelId, StringComparison.OrdinalIgnoreCase));
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if (channelInfo != null)
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{
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hostsWithChannel.Add(new Tuple<TunerHostInfo, ChannelInfo>(host, channelInfo));
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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 getting channels");
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}
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}
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foreach (var hostTuple in hostsWithChannel)
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{
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var host = hostTuple.Item1;
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var channelInfo = hostTuple.Item2;
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try
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{
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var liveStream = await GetChannelStream(host, channelInfo, streamId, currentLiveStreams, cancellationToken).ConfigureAwait(false);
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var startTime = DateTime.UtcNow;
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await liveStream.Open(cancellationToken).ConfigureAwait(false);
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var endTime = DateTime.UtcNow;
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Logger.LogInformation("Live stream opened after {0}ms", (endTime - startTime).TotalMilliseconds);
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return liveStream;
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error opening tuner");
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}
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}
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throw new LiveTvConflictException();
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}
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protected virtual string ChannelIdPrefix => Type + "_";
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protected virtual bool IsValidChannelId(string channelId)
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{
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if (string.IsNullOrEmpty(channelId))
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{
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throw new ArgumentNullException(nameof(channelId));
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}
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return channelId.StartsWith(ChannelIdPrefix, StringComparison.OrdinalIgnoreCase);
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}
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protected LiveTvOptions GetConfiguration()
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{
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return Config.GetConfiguration<LiveTvOptions>("livetv");
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}
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}
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}
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