mirror of
https://github.com/jellyfin/jellyfin.git
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242 lines
8.8 KiB
C#
242 lines
8.8 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Collections.Concurrent;
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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.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 MediaBrowser.Model.Serialization;
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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 IJsonSerializer JsonSerializer;
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protected readonly IFileSystem FileSystem;
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private readonly ConcurrentDictionary<string, ChannelCache> _channelCache =
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new ConcurrentDictionary<string, ChannelCache>(StringComparer.OrdinalIgnoreCase);
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protected BaseTunerHost(IServerConfigurationManager config, ILogger<BaseTunerHost> logger, IJsonSerializer jsonSerializer, IFileSystem fileSystem)
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{
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Config = config;
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Logger = logger;
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JsonSerializer = jsonSerializer;
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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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ChannelCache cache = null;
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var key = tuner.Id;
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if (enableCache && !string.IsNullOrEmpty(key) && _channelCache.TryGetValue(key, out cache))
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{
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return cache.Channels.ToList();
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}
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var result = await GetChannelsInternal(tuner, cancellationToken).ConfigureAwait(false);
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var list = result.ToList();
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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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cache = cache ?? new ChannelCache();
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cache.Channels = list;
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_channelCache.AddOrUpdate(key, cache, (k, v) => cache);
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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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JsonSerializer.SerializeToFile(channels, channelCacheFile);
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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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var channels = JsonSerializer.DeserializeFromFile<List<ChannelInfo>>(channelCacheFile);
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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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private class ChannelCache
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{
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public List<ChannelInfo> Channels;
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}
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}
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}
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