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jellyfin/Emby.Server.Implementations/Library/MediaSourceManager.cs

888 lines
32 KiB

using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using Microsoft.Extensions.Logging;
using MediaBrowser.Model.MediaInfo;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Threading;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Globalization;
using System.IO;
using System.Globalization;
using MediaBrowser.Common.Configuration;
namespace Emby.Server.Implementations.Library
{
public class MediaSourceManager : IMediaSourceManager, IDisposable
{
private readonly IItemRepository _itemRepo;
private readonly IUserManager _userManager;
private readonly ILibraryManager _libraryManager;
private readonly IJsonSerializer _jsonSerializer;
private readonly IFileSystem _fileSystem;
private IMediaSourceProvider[] _providers;
private readonly ILogger _logger;
private readonly IUserDataManager _userDataManager;
private readonly ITimerFactory _timerFactory;
private readonly Func<IMediaEncoder> _mediaEncoder;
private ILocalizationManager _localizationManager;
private IApplicationPaths _appPaths;
public MediaSourceManager(IItemRepository itemRepo, IApplicationPaths applicationPaths, ILocalizationManager localizationManager, IUserManager userManager, ILibraryManager libraryManager, ILogger logger, IJsonSerializer jsonSerializer, IFileSystem fileSystem, IUserDataManager userDataManager, ITimerFactory timerFactory, Func<IMediaEncoder> mediaEncoder)
{
_itemRepo = itemRepo;
_userManager = userManager;
_libraryManager = libraryManager;
_logger = logger;
_jsonSerializer = jsonSerializer;
_fileSystem = fileSystem;
_userDataManager = userDataManager;
_timerFactory = timerFactory;
_mediaEncoder = mediaEncoder;
_localizationManager = localizationManager;
_appPaths = applicationPaths;
}
public void AddParts(IEnumerable<IMediaSourceProvider> providers)
{
_providers = providers.ToArray();
}
public List<MediaStream> GetMediaStreams(MediaStreamQuery query)
{
var list = _itemRepo.GetMediaStreams(query);
foreach (var stream in list)
{
stream.SupportsExternalStream = StreamSupportsExternalStream(stream);
}
return list;
}
private bool StreamSupportsExternalStream(MediaStream stream)
{
if (stream.IsExternal)
{
return true;
}
if (stream.IsTextSubtitleStream)
{
return true;
}
return false;
}
public List<MediaStream> GetMediaStreams(string mediaSourceId)
{
var list = GetMediaStreams(new MediaStreamQuery
{
ItemId = new Guid(mediaSourceId)
});
return GetMediaStreamsForItem(list);
}
public List<MediaStream> GetMediaStreams(Guid itemId)
{
var list = GetMediaStreams(new MediaStreamQuery
{
ItemId = itemId
});
return GetMediaStreamsForItem(list);
}
private List<MediaStream> GetMediaStreamsForItem(List<MediaStream> streams)
{
foreach (var stream in streams)
{
if (stream.Type == MediaStreamType.Subtitle)
{
stream.SupportsExternalStream = StreamSupportsExternalStream(stream);
}
}
return streams;
}
public async Task<List<MediaSourceInfo>> GetPlayackMediaSources(BaseItem item, User user, bool allowMediaProbe, bool enablePathSubstitution, CancellationToken cancellationToken)
{
var mediaSources = GetStaticMediaSources(item, enablePathSubstitution, user);
if (allowMediaProbe && mediaSources[0].Type != MediaSourceType.Placeholder && !mediaSources[0].MediaStreams.Any(i => i.Type == MediaStreamType.Audio || i.Type == MediaStreamType.Video))
{
await item.RefreshMetadata(new MediaBrowser.Controller.Providers.MetadataRefreshOptions(new DirectoryService(_logger, _fileSystem))
{
EnableRemoteContentProbe = true,
MetadataRefreshMode = MediaBrowser.Controller.Providers.MetadataRefreshMode.FullRefresh
}, cancellationToken).ConfigureAwait(false);
mediaSources = GetStaticMediaSources(item, enablePathSubstitution, user);
}
var dynamicMediaSources = await GetDynamicMediaSources(item, cancellationToken).ConfigureAwait(false);
var list = new List<MediaSourceInfo>();
list.AddRange(mediaSources);
foreach (var source in dynamicMediaSources)
{
if (user != null)
{
SetDefaultAudioAndSubtitleStreamIndexes(item, source, user);
}
// Validate that this is actually possible
if (source.SupportsDirectStream)
{
source.SupportsDirectStream = SupportsDirectStream(source.Path, source.Protocol);
}
list.Add(source);
}
if (user != null)
{
foreach (var source in list)
{
if (string.Equals(item.MediaType, MediaType.Audio, StringComparison.OrdinalIgnoreCase))
{
if (!user.Policy.EnableAudioPlaybackTranscoding)
{
source.SupportsTranscoding = false;
}
}
}
}
return SortMediaSources(list).Where(i => i.Type != MediaSourceType.Placeholder).ToList();
}
public MediaProtocol GetPathProtocol(string path)
{
if (path.StartsWith("Rtsp", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Rtsp;
}
if (path.StartsWith("Rtmp", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Rtmp;
}
if (path.StartsWith("Http", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Http;
}
if (path.StartsWith("rtp", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Rtp;
}
if (path.StartsWith("ftp", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Ftp;
}
if (path.StartsWith("udp", StringComparison.OrdinalIgnoreCase))
{
return MediaProtocol.Udp;
}
return _fileSystem.IsPathFile(path) ? MediaProtocol.File : MediaProtocol.Http;
}
public bool SupportsDirectStream(string path, MediaProtocol protocol)
{
if (protocol == MediaProtocol.File)
{
return true;
}
if (protocol == MediaProtocol.Http)
{
if (path != null)
{
if (path.IndexOf(".m3u", StringComparison.OrdinalIgnoreCase) != -1)
{
return false;
}
return true;
}
}
return false;
}
private async Task<IEnumerable<MediaSourceInfo>> GetDynamicMediaSources(BaseItem item, CancellationToken cancellationToken)
{
var tasks = _providers.Select(i => GetDynamicMediaSources(item, i, cancellationToken));
var results = await Task.WhenAll(tasks).ConfigureAwait(false);
return results.SelectMany(i => i.ToList());
}
private async Task<IEnumerable<MediaSourceInfo>> GetDynamicMediaSources(BaseItem item, IMediaSourceProvider provider, CancellationToken cancellationToken)
{
try
{
var sources = await provider.GetMediaSources(item, cancellationToken).ConfigureAwait(false);
var list = sources.ToList();
foreach (var mediaSource in list)
{
mediaSource.InferTotalBitrate();
SetKeyProperties(provider, mediaSource);
}
return list;
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting media sources");
return new List<MediaSourceInfo>();
}
}
private void SetKeyProperties(IMediaSourceProvider provider, MediaSourceInfo mediaSource)
{
var prefix = provider.GetType().FullName.GetMD5().ToString("N") + LiveStreamIdDelimeter;
if (!string.IsNullOrEmpty(mediaSource.OpenToken) && !mediaSource.OpenToken.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
mediaSource.OpenToken = prefix + mediaSource.OpenToken;
}
if (!string.IsNullOrEmpty(mediaSource.LiveStreamId) && !mediaSource.LiveStreamId.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
mediaSource.LiveStreamId = prefix + mediaSource.LiveStreamId;
}
}
public async Task<MediaSourceInfo> GetMediaSource(BaseItem item, string mediaSourceId, string liveStreamId, bool enablePathSubstitution, CancellationToken cancellationToken)
{
if (!string.IsNullOrEmpty(liveStreamId))
{
return await GetLiveStream(liveStreamId, cancellationToken).ConfigureAwait(false);
}
var sources = await GetPlayackMediaSources(item, null, false, enablePathSubstitution, cancellationToken).ConfigureAwait(false);
return sources.FirstOrDefault(i => string.Equals(i.Id, mediaSourceId, StringComparison.OrdinalIgnoreCase));
}
public List<MediaSourceInfo> GetStaticMediaSources(BaseItem item, bool enablePathSubstitution, User user = null)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
var hasMediaSources = (IHasMediaSources)item;
var sources = hasMediaSources.GetMediaSources(enablePathSubstitution);
if (user != null)
{
foreach (var source in sources)
{
SetDefaultAudioAndSubtitleStreamIndexes(item, source, user);
}
}
return sources;
}
private string[] NormalizeLanguage(string language)
{
if (language != null)
{
var culture = _localizationManager.FindLanguageInfo(language);
if (culture != null)
{
return culture.ThreeLetterISOLanguageNames;
}
return new string[] { language };
}
return Array.Empty<string>();
}
private void SetDefaultSubtitleStreamIndex(MediaSourceInfo source, UserItemData userData, User user, bool allowRememberingSelection)
{
if (userData.SubtitleStreamIndex.HasValue && user.Configuration.RememberSubtitleSelections && user.Configuration.SubtitleMode != SubtitlePlaybackMode.None && allowRememberingSelection)
{
var index = userData.SubtitleStreamIndex.Value;
// Make sure the saved index is still valid
if (index == -1 || source.MediaStreams.Any(i => i.Type == MediaStreamType.Subtitle && i.Index == index))
{
source.DefaultSubtitleStreamIndex = index;
return;
}
}
var preferredSubs = string.IsNullOrEmpty(user.Configuration.SubtitleLanguagePreference)
? Array.Empty<string>() : NormalizeLanguage(user.Configuration.SubtitleLanguagePreference);
var defaultAudioIndex = source.DefaultAudioStreamIndex;
var audioLangage = defaultAudioIndex == null
? null
: source.MediaStreams.Where(i => i.Type == MediaStreamType.Audio && i.Index == defaultAudioIndex).Select(i => i.Language).FirstOrDefault();
source.DefaultSubtitleStreamIndex = MediaStreamSelector.GetDefaultSubtitleStreamIndex(source.MediaStreams,
preferredSubs,
user.Configuration.SubtitleMode,
audioLangage);
MediaStreamSelector.SetSubtitleStreamScores(source.MediaStreams, preferredSubs,
user.Configuration.SubtitleMode, audioLangage);
}
private void SetDefaultAudioStreamIndex(MediaSourceInfo source, UserItemData userData, User user, bool allowRememberingSelection)
{
if (userData.AudioStreamIndex.HasValue && user.Configuration.RememberAudioSelections && allowRememberingSelection)
{
var index = userData.AudioStreamIndex.Value;
// Make sure the saved index is still valid
if (source.MediaStreams.Any(i => i.Type == MediaStreamType.Audio && i.Index == index))
{
source.DefaultAudioStreamIndex = index;
return;
}
}
var preferredAudio = string.IsNullOrEmpty(user.Configuration.AudioLanguagePreference)
? Array.Empty<string>()
: NormalizeLanguage(user.Configuration.AudioLanguagePreference);
source.DefaultAudioStreamIndex = MediaStreamSelector.GetDefaultAudioStreamIndex(source.MediaStreams, preferredAudio, user.Configuration.PlayDefaultAudioTrack);
}
public void SetDefaultAudioAndSubtitleStreamIndexes(BaseItem item, MediaSourceInfo source, User user)
{
// Item would only be null if the app didn't supply ItemId as part of the live stream open request
var mediaType = item == null ? MediaType.Video : item.MediaType;
if (string.Equals(mediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase))
{
var userData = item == null ? new UserItemData() : _userDataManager.GetUserData(user, item);
var allowRememberingSelection = item == null || item.EnableRememberingTrackSelections;
SetDefaultAudioStreamIndex(source, userData, user, allowRememberingSelection);
SetDefaultSubtitleStreamIndex(source, userData, user, allowRememberingSelection);
}
else if (string.Equals(mediaType, MediaType.Audio, StringComparison.OrdinalIgnoreCase))
{
var audio = source.MediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
if (audio != null)
{
source.DefaultAudioStreamIndex = audio.Index;
}
}
}
private IEnumerable<MediaSourceInfo> SortMediaSources(IEnumerable<MediaSourceInfo> sources)
{
return sources.OrderBy(i =>
{
if (i.VideoType.HasValue && i.VideoType.Value == VideoType.VideoFile)
{
return 0;
}
return 1;
}).ThenBy(i => i.Video3DFormat.HasValue ? 1 : 0)
.ThenByDescending(i =>
{
var stream = i.VideoStream;
return stream == null || stream.Width == null ? 0 : stream.Width.Value;
})
.ToList();
}
private readonly Dictionary<string, ILiveStream> _openStreams = new Dictionary<string, ILiveStream>(StringComparer.OrdinalIgnoreCase);
private readonly SemaphoreSlim _liveStreamSemaphore = new SemaphoreSlim(1, 1);
public async Task<Tuple<LiveStreamResponse, IDirectStreamProvider>> OpenLiveStreamInternal(LiveStreamRequest request, CancellationToken cancellationToken)
{
await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
MediaSourceInfo mediaSource;
ILiveStream liveStream;
try
{
var tuple = GetProvider(request.OpenToken);
var provider = tuple.Item1;
var currentLiveStreams = _openStreams.Values.ToList();
liveStream = await provider.OpenMediaSource(tuple.Item2, currentLiveStreams, cancellationToken).ConfigureAwait(false);
mediaSource = liveStream.MediaSource;
// Validate that this is actually possible
if (mediaSource.SupportsDirectStream)
{
mediaSource.SupportsDirectStream = SupportsDirectStream(mediaSource.Path, mediaSource.Protocol);
}
SetKeyProperties(provider, mediaSource);
_openStreams[mediaSource.LiveStreamId] = liveStream;
}
finally
{
_liveStreamSemaphore.Release();
}
// TODO: Don't hardcode this
var isAudio = false;
try
{
if (mediaSource.MediaStreams.Any(i => i.Index != -1) || !mediaSource.SupportsProbing)
{
AddMediaInfo(mediaSource, isAudio);
}
else
{
// hack - these two values were taken from LiveTVMediaSourceProvider
var cacheKey = request.OpenToken;
await new LiveStreamHelper(_mediaEncoder(), _logger, _jsonSerializer, _appPaths).AddMediaInfoWithProbe(mediaSource, isAudio, cacheKey, true, cancellationToken).ConfigureAwait(false);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error probing live tv stream");
AddMediaInfo(mediaSource, isAudio);
}
var json = _jsonSerializer.SerializeToString(mediaSource);
_logger.LogInformation("Live stream opened: " + json);
var clone = _jsonSerializer.DeserializeFromString<MediaSourceInfo>(json);
if (!request.UserId.Equals(Guid.Empty))
{
var user = _userManager.GetUserById(request.UserId);
var item = request.ItemId.Equals(Guid.Empty)
? null
: _libraryManager.GetItemById(request.ItemId);
SetDefaultAudioAndSubtitleStreamIndexes(item, clone, user);
}
return new Tuple<LiveStreamResponse, IDirectStreamProvider>(new LiveStreamResponse
{
MediaSource = clone
}, liveStream as IDirectStreamProvider);
}
private void AddMediaInfo(MediaSourceInfo mediaSource, bool isAudio)
{
mediaSource.DefaultSubtitleStreamIndex = null;
// Null this out so that it will be treated like a live stream
if (mediaSource.IsInfiniteStream)
{
mediaSource.RunTimeTicks = null;
}
var audioStream = mediaSource.MediaStreams.FirstOrDefault(i => i.Type == MediaBrowser.Model.Entities.MediaStreamType.Audio);
if (audioStream == null || audioStream.Index == -1)
{
mediaSource.DefaultAudioStreamIndex = null;
}
else
{
mediaSource.DefaultAudioStreamIndex = audioStream.Index;
}
var videoStream = mediaSource.MediaStreams.FirstOrDefault(i => i.Type == MediaBrowser.Model.Entities.MediaStreamType.Video);
if (videoStream != null)
{
if (!videoStream.BitRate.HasValue)
{
var width = videoStream.Width ?? 1920;
if (width >= 3000)
{
videoStream.BitRate = 30000000;
}
else if (width >= 1900)
{
videoStream.BitRate = 20000000;
}
else if (width >= 1200)
{
videoStream.BitRate = 8000000;
}
else if (width >= 700)
{
videoStream.BitRate = 2000000;
}
}
}
// Try to estimate this
mediaSource.InferTotalBitrate();
}
public async Task<IDirectStreamProvider> GetDirectStreamProviderByUniqueId(string uniqueId, CancellationToken cancellationToken)
{
await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
var info = _openStreams.Values.FirstOrDefault(i =>
{
var liveStream = i as ILiveStream;
if (liveStream != null)
{
return string.Equals(liveStream.UniqueId, uniqueId, StringComparison.OrdinalIgnoreCase);
}
return false;
});
return info as IDirectStreamProvider;
}
finally
{
_liveStreamSemaphore.Release();
}
}
public async Task<LiveStreamResponse> OpenLiveStream(LiveStreamRequest request, CancellationToken cancellationToken)
{
var result = await OpenLiveStreamInternal(request, cancellationToken).ConfigureAwait(false);
return result.Item1;
}
public async Task<MediaSourceInfo> GetLiveStreamMediaInfo(string id, CancellationToken cancellationToken)
{
var liveStreamInfo = await GetLiveStreamInfo(id, cancellationToken).ConfigureAwait(false);
var mediaSource = liveStreamInfo.MediaSource;
if (liveStreamInfo is IDirectStreamProvider)
{
var info = await _mediaEncoder().GetMediaInfo(new MediaInfoRequest
{
MediaSource = mediaSource,
ExtractChapters = false,
MediaType = DlnaProfileType.Video
}, cancellationToken).ConfigureAwait(false);
mediaSource.MediaStreams = info.MediaStreams;
mediaSource.Container = info.Container;
mediaSource.Bitrate = info.Bitrate;
}
return mediaSource;
}
public async Task AddMediaInfoWithProbe(MediaSourceInfo mediaSource, bool isAudio, string cacheKey, bool addProbeDelay, bool isLiveStream, CancellationToken cancellationToken)
{
var originalRuntime = mediaSource.RunTimeTicks;
var now = DateTime.UtcNow;
MediaInfo mediaInfo = null;
var cacheFilePath = string.IsNullOrEmpty(cacheKey) ? null : Path.Combine(_appPaths.CachePath, "mediainfo", cacheKey.GetMD5().ToString("N") + ".json");
if (!string.IsNullOrEmpty(cacheKey))
{
try
{
mediaInfo = _jsonSerializer.DeserializeFromFile<MediaInfo>(cacheFilePath);
//_logger.LogDebug("Found cached media info");
}
catch (Exception ex)
{
}
}
if (mediaInfo == null)
{
if (addProbeDelay)
{
var delayMs = mediaSource.AnalyzeDurationMs ?? 0;
delayMs = Math.Max(3000, delayMs);
await Task.Delay(delayMs, cancellationToken).ConfigureAwait(false);
}
if (isLiveStream)
{
mediaSource.AnalyzeDurationMs = 3000;
}
mediaInfo = await _mediaEncoder().GetMediaInfo(new MediaInfoRequest
{
MediaSource = mediaSource,
MediaType = isAudio ? DlnaProfileType.Audio : DlnaProfileType.Video,
ExtractChapters = false
}, cancellationToken).ConfigureAwait(false);
if (cacheFilePath != null)
{
_fileSystem.CreateDirectory(_fileSystem.GetDirectoryName(cacheFilePath));
_jsonSerializer.SerializeToFile(mediaInfo, cacheFilePath);
//_logger.LogDebug("Saved media info to {0}", cacheFilePath);
}
}
var mediaStreams = mediaInfo.MediaStreams;
if (isLiveStream && !string.IsNullOrEmpty(cacheKey))
{
var newList = new List<MediaStream>();
newList.AddRange(mediaStreams.Where(i => i.Type == MediaStreamType.Video).Take(1));
newList.AddRange(mediaStreams.Where(i => i.Type == MediaStreamType.Audio).Take(1));
foreach (var stream in newList)
{
stream.Index = -1;
stream.Language = null;
}
mediaStreams = newList;
}
_logger.LogInformation("Live tv media info probe took {0} seconds", (DateTime.UtcNow - now).TotalSeconds.ToString(CultureInfo.InvariantCulture));
mediaSource.Bitrate = mediaInfo.Bitrate;
mediaSource.Container = mediaInfo.Container;
mediaSource.Formats = mediaInfo.Formats;
mediaSource.MediaStreams = mediaStreams;
mediaSource.RunTimeTicks = mediaInfo.RunTimeTicks;
mediaSource.Size = mediaInfo.Size;
mediaSource.Timestamp = mediaInfo.Timestamp;
mediaSource.Video3DFormat = mediaInfo.Video3DFormat;
mediaSource.VideoType = mediaInfo.VideoType;
mediaSource.DefaultSubtitleStreamIndex = null;
if (isLiveStream)
{
// Null this out so that it will be treated like a live stream
if (!originalRuntime.HasValue)
{
mediaSource.RunTimeTicks = null;
}
}
var audioStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Audio);
if (audioStream == null || audioStream.Index == -1)
{
mediaSource.DefaultAudioStreamIndex = null;
}
else
{
mediaSource.DefaultAudioStreamIndex = audioStream.Index;
}
var videoStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
if (videoStream != null)
{
if (!videoStream.BitRate.HasValue)
{
var width = videoStream.Width ?? 1920;
if (width >= 3000)
{
videoStream.BitRate = 30000000;
}
else if (width >= 1900)
{
videoStream.BitRate = 20000000;
}
else if (width >= 1200)
{
videoStream.BitRate = 8000000;
}
else if (width >= 700)
{
videoStream.BitRate = 2000000;
}
}
// This is coming up false and preventing stream copy
videoStream.IsAVC = null;
}
if (isLiveStream)
{
mediaSource.AnalyzeDurationMs = 3000;
}
// Try to estimate this
mediaSource.InferTotalBitrate(true);
}
public async Task<Tuple<MediaSourceInfo, IDirectStreamProvider>> GetLiveStreamWithDirectStreamProvider(string id, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
var info = await GetLiveStreamInfo(id, cancellationToken).ConfigureAwait(false);
return new Tuple<MediaSourceInfo, IDirectStreamProvider>(info.MediaSource, info as IDirectStreamProvider);
}
private async Task<ILiveStream> GetLiveStreamInfo(string id, CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
ILiveStream info;
if (_openStreams.TryGetValue(id, out info))
{
return info;
}
else
{
throw new ResourceNotFoundException();
}
}
finally
{
_liveStreamSemaphore.Release();
}
}
public async Task<MediaSourceInfo> GetLiveStream(string id, CancellationToken cancellationToken)
{
var result = await GetLiveStreamWithDirectStreamProvider(id, cancellationToken).ConfigureAwait(false);
return result.Item1;
}
public async Task CloseLiveStream(string id)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentNullException("id");
}
await _liveStreamSemaphore.WaitAsync().ConfigureAwait(false);
try
{
ILiveStream liveStream;
if (_openStreams.TryGetValue(id, out liveStream))
{
liveStream.ConsumerCount--;
_logger.LogInformation("Live stream {0} consumer count is now {1}", liveStream.OriginalStreamId, liveStream.ConsumerCount);
if (liveStream.ConsumerCount <= 0)
{
_openStreams.Remove(id);
_logger.LogInformation("Closing live stream {0}", id);
await liveStream.Close().ConfigureAwait(false);
_logger.LogInformation("Live stream {0} closed successfully", id);
}
}
}
finally
{
_liveStreamSemaphore.Release();
}
}
// Do not use a pipe here because Roku http requests to the server will fail, without any explicit error message.
private const char LiveStreamIdDelimeter = '_';
private Tuple<IMediaSourceProvider, string> GetProvider(string key)
{
if (string.IsNullOrEmpty(key))
{
throw new ArgumentException("key");
}
var keys = key.Split(new[] { LiveStreamIdDelimeter }, 2);
var provider = _providers.FirstOrDefault(i => string.Equals(i.GetType().FullName.GetMD5().ToString("N"), keys[0], StringComparison.OrdinalIgnoreCase));
var splitIndex = key.IndexOf(LiveStreamIdDelimeter);
var keyId = key.Substring(splitIndex + 1);
return new Tuple<IMediaSourceProvider, string>(provider, keyId);
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
}
private readonly object _disposeLock = new object();
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
if (dispose)
{
lock (_disposeLock)
{
foreach (var key in _openStreams.Keys.ToList())
{
var task = CloseLiveStream(key);
Task.WaitAll(task);
}
}
}
}
}
}