mirror of
https://github.com/jellyfin/jellyfin.git
synced 2026-05-31 21:08:27 +01:00
Refactor and add scheduled task
This commit is contained in:
cvium
@@ -1,57 +1,56 @@
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namespace Jellyfin.MediaEncoding.Hls.Playlist
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namespace Jellyfin.MediaEncoding.Hls.Playlist;
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/// <summary>
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/// Request class for the <see cref="IDynamicHlsPlaylistGenerator.CreateMainPlaylist(CreateMainPlaylistRequest)"/> method.
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/// </summary>
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public class CreateMainPlaylistRequest
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{
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/// <summary>
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/// Request class for the <see cref="IDynamicHlsPlaylistGenerator.CreateMainPlaylist(CreateMainPlaylistRequest)"/> method.
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/// Initializes a new instance of the <see cref="CreateMainPlaylistRequest"/> class.
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/// </summary>
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public class CreateMainPlaylistRequest
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/// <param name="filePath">The absolute file path to the file.</param>
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/// <param name="desiredSegmentLengthMs">The desired segment length in milliseconds.</param>
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/// <param name="totalRuntimeTicks">The total duration of the file in ticks.</param>
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/// <param name="segmentContainer">The desired segment container eg. "ts".</param>
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/// <param name="endpointPrefix">The URI prefix for the relative URL in the playlist.</param>
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/// <param name="queryString">The desired query string to append (must start with ?).</param>
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public CreateMainPlaylistRequest(string filePath, int desiredSegmentLengthMs, long totalRuntimeTicks, string segmentContainer, string endpointPrefix, string queryString)
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="CreateMainPlaylistRequest"/> class.
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/// </summary>
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/// <param name="filePath">The absolute file path to the file.</param>
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/// <param name="desiredSegmentLengthMs">The desired segment length in milliseconds.</param>
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/// <param name="totalRuntimeTicks">The total duration of the file in ticks.</param>
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/// <param name="segmentContainer">The desired segment container eg. "ts".</param>
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/// <param name="endpointPrefix">The URI prefix for the relative URL in the playlist.</param>
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/// <param name="queryString">The desired query string to append (must start with ?).</param>
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public CreateMainPlaylistRequest(string filePath, int desiredSegmentLengthMs, long totalRuntimeTicks, string segmentContainer, string endpointPrefix, string queryString)
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{
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FilePath = filePath;
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DesiredSegmentLengthMs = desiredSegmentLengthMs;
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TotalRuntimeTicks = totalRuntimeTicks;
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SegmentContainer = segmentContainer;
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EndpointPrefix = endpointPrefix;
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QueryString = queryString;
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}
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/// <summary>
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/// Gets the file path.
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/// </summary>
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public string FilePath { get; }
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/// <summary>
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/// Gets the desired segment length in milliseconds.
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/// </summary>
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public int DesiredSegmentLengthMs { get; }
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/// <summary>
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/// Gets the total runtime in ticks.
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/// </summary>
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public long TotalRuntimeTicks { get; }
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/// <summary>
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/// Gets the segment container.
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/// </summary>
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public string SegmentContainer { get; }
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/// <summary>
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/// Gets the endpoint prefix for the URL.
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/// </summary>
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public string EndpointPrefix { get; }
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/// <summary>
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/// Gets the query string.
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/// </summary>
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public string QueryString { get; }
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FilePath = filePath;
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DesiredSegmentLengthMs = desiredSegmentLengthMs;
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TotalRuntimeTicks = totalRuntimeTicks;
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SegmentContainer = segmentContainer;
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EndpointPrefix = endpointPrefix;
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QueryString = queryString;
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}
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/// <summary>
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/// Gets the file path.
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/// </summary>
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public string FilePath { get; }
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/// <summary>
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/// Gets the desired segment length in milliseconds.
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/// </summary>
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public int DesiredSegmentLengthMs { get; }
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/// <summary>
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/// Gets the total runtime in ticks.
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/// </summary>
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public long TotalRuntimeTicks { get; }
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/// <summary>
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/// Gets the segment container.
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/// </summary>
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public string SegmentContainer { get; }
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/// <summary>
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/// Gets the endpoint prefix for the URL.
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/// </summary>
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public string EndpointPrefix { get; }
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/// <summary>
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/// Gets the query string.
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/// </summary>
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public string QueryString { get; }
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}
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@@ -5,269 +5,200 @@ using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Text.Json;
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using Jellyfin.Extensions.Json;
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using Jellyfin.MediaEncoding.Hls.Extractors;
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using Jellyfin.MediaEncoding.Keyframes;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.MediaEncoding;
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using Microsoft.Extensions.Logging;
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namespace Jellyfin.MediaEncoding.Hls.Playlist
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namespace Jellyfin.MediaEncoding.Hls.Playlist;
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/// <inheritdoc />
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public class DynamicHlsPlaylistGenerator : IDynamicHlsPlaylistGenerator
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{
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/// <inheritdoc />
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public class DynamicHlsPlaylistGenerator : IDynamicHlsPlaylistGenerator
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private readonly IServerConfigurationManager _serverConfigurationManager;
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private readonly IKeyframeExtractor[] _extractors;
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/// <summary>
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/// Initializes a new instance of the <see cref="DynamicHlsPlaylistGenerator"/> class.
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/// </summary>
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/// <param name="serverConfigurationManager">An instance of the see <see cref="IServerConfigurationManager"/> interface.</param>
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/// <param name="extractors">An instance of <see cref="IEnumerable{IKeyframeExtractor}"/>.</param>
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public DynamicHlsPlaylistGenerator(IServerConfigurationManager serverConfigurationManager, IEnumerable<IKeyframeExtractor> extractors)
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{
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private const string DefaultContainerExtension = ".ts";
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_serverConfigurationManager = serverConfigurationManager;
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_extractors = extractors.Where(e => e.IsMetadataBased).ToArray();
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}
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private readonly JsonSerializerOptions _jsonOptions = JsonDefaults.Options;
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private readonly IServerConfigurationManager _serverConfigurationManager;
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private readonly IMediaEncoder _mediaEncoder;
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private readonly IApplicationPaths _applicationPaths;
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private readonly KeyframeExtractor _keyframeExtractor;
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private readonly ILogger<DynamicHlsPlaylistGenerator> _logger;
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/// <summary>
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/// Initializes a new instance of the <see cref="DynamicHlsPlaylistGenerator"/> class.
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/// </summary>
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/// <param name="serverConfigurationManager">An instance of the see <see cref="IServerConfigurationManager"/> interface.</param>
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/// <param name="mediaEncoder">An instance of the see <see cref="IMediaEncoder"/> interface.</param>
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/// <param name="applicationPaths">An instance of the <see cref="IApplicationPaths"/> interface.</param>
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/// <param name="loggerFactory">An instance of the see <see cref="ILoggerFactory"/> interface.</param>
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public DynamicHlsPlaylistGenerator(IServerConfigurationManager serverConfigurationManager, IMediaEncoder mediaEncoder, IApplicationPaths applicationPaths, ILoggerFactory loggerFactory)
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/// <inheritdoc />
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public string CreateMainPlaylist(CreateMainPlaylistRequest request)
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{
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IReadOnlyList<double> segments;
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if (TryExtractKeyframes(request.FilePath, out var keyframeData))
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{
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_serverConfigurationManager = serverConfigurationManager;
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_mediaEncoder = mediaEncoder;
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_applicationPaths = applicationPaths;
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_keyframeExtractor = new KeyframeExtractor(loggerFactory.CreateLogger<KeyframeExtractor>());
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_logger = loggerFactory.CreateLogger<DynamicHlsPlaylistGenerator>();
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segments = ComputeSegments(keyframeData, request.DesiredSegmentLengthMs);
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}
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else
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{
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segments = ComputeEqualLengthSegments(request.DesiredSegmentLengthMs, request.TotalRuntimeTicks);
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}
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private string KeyframeCachePath => Path.Combine(_applicationPaths.DataPath, "keyframes");
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var segmentExtension = EncodingHelper.GetSegmentFileExtension(request.SegmentContainer);
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/// <inheritdoc />
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public string CreateMainPlaylist(CreateMainPlaylistRequest request)
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// http://ffmpeg.org/ffmpeg-all.html#toc-hls-2
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var isHlsInFmp4 = string.Equals(segmentExtension, "mp4", StringComparison.OrdinalIgnoreCase);
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var hlsVersion = isHlsInFmp4 ? "7" : "3";
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var builder = new StringBuilder(128);
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builder.AppendLine("#EXTM3U")
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.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD")
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.Append("#EXT-X-VERSION:")
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.Append(hlsVersion)
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.AppendLine()
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.Append("#EXT-X-TARGETDURATION:")
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.Append(Math.Ceiling(segments.Count > 0 ? segments.Max() : request.DesiredSegmentLengthMs))
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.AppendLine()
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.AppendLine("#EXT-X-MEDIA-SEQUENCE:0");
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var index = 0;
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if (isHlsInFmp4)
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{
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IReadOnlyList<double> segments;
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if (TryExtractKeyframes(request.FilePath, out var keyframeData))
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{
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segments = ComputeSegments(keyframeData, request.DesiredSegmentLengthMs);
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}
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else
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{
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segments = ComputeEqualLengthSegments(request.DesiredSegmentLengthMs, request.TotalRuntimeTicks);
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}
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var segmentExtension = GetSegmentFileExtension(request.SegmentContainer);
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// http://ffmpeg.org/ffmpeg-all.html#toc-hls-2
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var isHlsInFmp4 = string.Equals(segmentExtension, "mp4", StringComparison.OrdinalIgnoreCase);
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var hlsVersion = isHlsInFmp4 ? "7" : "3";
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var builder = new StringBuilder(128);
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builder.AppendLine("#EXTM3U")
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.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD")
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.Append("#EXT-X-VERSION:")
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.Append(hlsVersion)
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.AppendLine()
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.Append("#EXT-X-TARGETDURATION:")
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.Append(Math.Ceiling(segments.Count > 0 ? segments.Max() : request.DesiredSegmentLengthMs))
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.AppendLine()
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.AppendLine("#EXT-X-MEDIA-SEQUENCE:0");
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var index = 0;
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if (isHlsInFmp4)
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{
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builder.Append("#EXT-X-MAP:URI=\"")
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.Append(request.EndpointPrefix)
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.Append("-1")
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.Append(segmentExtension)
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.Append(request.QueryString)
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.Append('"')
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.AppendLine();
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}
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long currentRuntimeInSeconds = 0;
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foreach (var length in segments)
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{
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// Manually convert to ticks to avoid precision loss when converting double
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var lengthTicks = Convert.ToInt64(length * TimeSpan.TicksPerSecond);
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builder.Append("#EXTINF:")
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.Append(length.ToString("0.000000", CultureInfo.InvariantCulture))
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.AppendLine(", nodesc")
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.Append(request.EndpointPrefix)
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.Append(index++)
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.Append(segmentExtension)
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.Append(request.QueryString)
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.Append("&runtimeTicks=")
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.Append(currentRuntimeInSeconds)
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.Append("&actualSegmentLengthTicks=")
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.Append(lengthTicks)
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.AppendLine();
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currentRuntimeInSeconds += lengthTicks;
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}
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builder.AppendLine("#EXT-X-ENDLIST");
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return builder.ToString();
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builder.Append("#EXT-X-MAP:URI=\"")
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.Append(request.EndpointPrefix)
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.Append("-1")
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.Append(segmentExtension)
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.Append(request.QueryString)
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.Append('"')
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.AppendLine();
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}
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private bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
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long currentRuntimeInSeconds = 0;
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foreach (var length in segments)
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{
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keyframeData = null;
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if (!IsExtractionAllowedForFile(filePath, _serverConfigurationManager.GetEncodingOptions().AllowAutomaticKeyframeExtractionForExtensions))
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{
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return false;
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}
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// Manually convert to ticks to avoid precision loss when converting double
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var lengthTicks = Convert.ToInt64(length * TimeSpan.TicksPerSecond);
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builder.Append("#EXTINF:")
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.Append(length.ToString("0.000000", CultureInfo.InvariantCulture))
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.AppendLine(", nodesc")
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.Append(request.EndpointPrefix)
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.Append(index++)
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.Append(segmentExtension)
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.Append(request.QueryString)
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.Append("&runtimeTicks=")
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.Append(currentRuntimeInSeconds)
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.Append("&actualSegmentLengthTicks=")
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.Append(lengthTicks)
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.AppendLine();
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var succeeded = false;
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var cachePath = GetCachePath(filePath);
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if (TryReadFromCache(cachePath, out var cachedResult))
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{
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keyframeData = cachedResult;
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}
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else
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{
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try
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{
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keyframeData = _keyframeExtractor.GetKeyframeData(filePath, _mediaEncoder.ProbePath, string.Empty);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Keyframe extraction failed for path {FilePath}", filePath);
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return false;
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}
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succeeded = keyframeData.KeyframeTicks.Count > 0;
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if (succeeded)
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{
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CacheResult(cachePath, keyframeData);
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}
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}
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return succeeded;
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currentRuntimeInSeconds += lengthTicks;
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}
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private void CacheResult(string cachePath, KeyframeData keyframeData)
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builder.AppendLine("#EXT-X-ENDLIST");
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return builder.ToString();
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}
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private bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
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{
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keyframeData = null;
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if (!IsExtractionAllowedForFile(filePath, _serverConfigurationManager.GetEncodingOptions().AllowOnDemandMetadataBasedKeyframeExtractionForExtensions))
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{
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var json = JsonSerializer.Serialize(keyframeData, _jsonOptions);
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Directory.CreateDirectory(Path.GetDirectoryName(cachePath) ?? throw new ArgumentException($"Provided path ({cachePath}) is not valid.", nameof(cachePath)));
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File.WriteAllText(cachePath, json);
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}
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private string GetCachePath(string filePath)
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{
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var lastWriteTimeUtc = File.GetLastWriteTimeUtc(filePath);
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ReadOnlySpan<char> filename = (filePath + "_" + lastWriteTimeUtc.Ticks.ToString(CultureInfo.InvariantCulture)).GetMD5() + ".json";
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var prefix = filename.Slice(0, 1);
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return Path.Join(KeyframeCachePath, prefix, filename);
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}
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private bool TryReadFromCache(string cachePath, [NotNullWhen(true)] out KeyframeData? cachedResult)
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{
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if (File.Exists(cachePath))
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{
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var bytes = File.ReadAllBytes(cachePath);
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cachedResult = JsonSerializer.Deserialize<KeyframeData>(bytes, _jsonOptions);
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return cachedResult != null;
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}
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cachedResult = null;
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return false;
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}
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internal static bool IsExtractionAllowedForFile(ReadOnlySpan<char> filePath, string[] allowedExtensions)
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var len = _extractors.Length;
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for (var i = 0; i < len; i++)
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{
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var extension = Path.GetExtension(filePath);
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if (extension.IsEmpty)
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var extractor = _extractors[i];
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if (!extractor.TryExtractKeyframes(filePath, out var result))
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{
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return false;
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continue;
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}
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// Remove the leading dot
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var extensionWithoutDot = extension[1..];
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for (var i = 0; i < allowedExtensions.Length; i++)
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{
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var allowedExtension = allowedExtensions[i];
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if (extensionWithoutDot.Equals(allowedExtension, StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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}
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keyframeData = result;
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return true;
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}
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return false;
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}
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internal static bool IsExtractionAllowedForFile(ReadOnlySpan<char> filePath, string[] allowedExtensions)
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{
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var extension = Path.GetExtension(filePath);
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if (extension.IsEmpty)
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{
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return false;
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}
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internal static IReadOnlyList<double> ComputeSegments(KeyframeData keyframeData, int desiredSegmentLengthMs)
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// Remove the leading dot
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var extensionWithoutDot = extension[1..];
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for (var i = 0; i < allowedExtensions.Length; i++)
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{
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if (keyframeData.KeyframeTicks.Count > 0 && keyframeData.TotalDuration < keyframeData.KeyframeTicks[^1])
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var allowedExtension = allowedExtensions[i].AsSpan().TrimStart('.');
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if (extensionWithoutDot.Equals(allowedExtension, StringComparison.OrdinalIgnoreCase))
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{
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throw new ArgumentException("Invalid duration in keyframe data", nameof(keyframeData));
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return true;
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}
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long lastKeyframe = 0;
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var result = new List<double>();
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// Scale the segment length to ticks to match the keyframes
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var desiredSegmentLengthTicks = TimeSpan.FromMilliseconds(desiredSegmentLengthMs).Ticks;
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var desiredCutTime = desiredSegmentLengthTicks;
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for (var j = 0; j < keyframeData.KeyframeTicks.Count; j++)
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{
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var keyframe = keyframeData.KeyframeTicks[j];
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if (keyframe >= desiredCutTime)
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{
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var currentSegmentLength = keyframe - lastKeyframe;
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result.Add(TimeSpan.FromTicks(currentSegmentLength).TotalSeconds);
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lastKeyframe = keyframe;
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desiredCutTime += desiredSegmentLengthTicks;
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}
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}
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result.Add(TimeSpan.FromTicks(keyframeData.TotalDuration - lastKeyframe).TotalSeconds);
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return result;
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}
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internal static double[] ComputeEqualLengthSegments(int desiredSegmentLengthMs, long totalRuntimeTicks)
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return false;
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}
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internal static IReadOnlyList<double> ComputeSegments(KeyframeData keyframeData, int desiredSegmentLengthMs)
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{
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if (keyframeData.KeyframeTicks.Count > 0 && keyframeData.TotalDuration < keyframeData.KeyframeTicks[^1])
|
||||
{
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||||
if (desiredSegmentLengthMs == 0 || totalRuntimeTicks == 0)
|
||||
{
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||||
throw new InvalidOperationException($"Invalid segment length ({desiredSegmentLengthMs}) or runtime ticks ({totalRuntimeTicks})");
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||||
}
|
||||
|
||||
var desiredSegmentLength = TimeSpan.FromMilliseconds(desiredSegmentLengthMs);
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||||
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var segmentLengthTicks = desiredSegmentLength.Ticks;
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var wholeSegments = totalRuntimeTicks / segmentLengthTicks;
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var remainingTicks = totalRuntimeTicks % segmentLengthTicks;
|
||||
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||||
var segmentsLen = wholeSegments + (remainingTicks == 0 ? 0 : 1);
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var segments = new double[segmentsLen];
|
||||
for (int i = 0; i < wholeSegments; i++)
|
||||
{
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segments[i] = desiredSegmentLength.TotalSeconds;
|
||||
}
|
||||
|
||||
if (remainingTicks != 0)
|
||||
{
|
||||
segments[^1] = TimeSpan.FromTicks(remainingTicks).TotalSeconds;
|
||||
}
|
||||
|
||||
return segments;
|
||||
throw new ArgumentException("Invalid duration in keyframe data", nameof(keyframeData));
|
||||
}
|
||||
|
||||
// TODO copied from DynamicHlsController
|
||||
private static string GetSegmentFileExtension(string segmentContainer)
|
||||
long lastKeyframe = 0;
|
||||
var result = new List<double>();
|
||||
// Scale the segment length to ticks to match the keyframes
|
||||
var desiredSegmentLengthTicks = TimeSpan.FromMilliseconds(desiredSegmentLengthMs).Ticks;
|
||||
var desiredCutTime = desiredSegmentLengthTicks;
|
||||
for (var j = 0; j < keyframeData.KeyframeTicks.Count; j++)
|
||||
{
|
||||
if (!string.IsNullOrWhiteSpace(segmentContainer))
|
||||
var keyframe = keyframeData.KeyframeTicks[j];
|
||||
if (keyframe >= desiredCutTime)
|
||||
{
|
||||
return "." + segmentContainer;
|
||||
var currentSegmentLength = keyframe - lastKeyframe;
|
||||
result.Add(TimeSpan.FromTicks(currentSegmentLength).TotalSeconds);
|
||||
lastKeyframe = keyframe;
|
||||
desiredCutTime += desiredSegmentLengthTicks;
|
||||
}
|
||||
|
||||
return DefaultContainerExtension;
|
||||
}
|
||||
|
||||
result.Add(TimeSpan.FromTicks(keyframeData.TotalDuration - lastKeyframe).TotalSeconds);
|
||||
return result;
|
||||
}
|
||||
|
||||
internal static double[] ComputeEqualLengthSegments(int desiredSegmentLengthMs, long totalRuntimeTicks)
|
||||
{
|
||||
if (desiredSegmentLengthMs == 0 || totalRuntimeTicks == 0)
|
||||
{
|
||||
throw new InvalidOperationException($"Invalid segment length ({desiredSegmentLengthMs}) or runtime ticks ({totalRuntimeTicks})");
|
||||
}
|
||||
|
||||
var desiredSegmentLength = TimeSpan.FromMilliseconds(desiredSegmentLengthMs);
|
||||
|
||||
var segmentLengthTicks = desiredSegmentLength.Ticks;
|
||||
var wholeSegments = totalRuntimeTicks / segmentLengthTicks;
|
||||
var remainingTicks = totalRuntimeTicks % segmentLengthTicks;
|
||||
|
||||
var segmentsLen = wholeSegments + (remainingTicks == 0 ? 0 : 1);
|
||||
var segments = new double[segmentsLen];
|
||||
for (int i = 0; i < wholeSegments; i++)
|
||||
{
|
||||
segments[i] = desiredSegmentLength.TotalSeconds;
|
||||
}
|
||||
|
||||
if (remainingTicks != 0)
|
||||
{
|
||||
segments[^1] = TimeSpan.FromTicks(remainingTicks).TotalSeconds;
|
||||
}
|
||||
|
||||
return segments;
|
||||
}
|
||||
}
|
||||
|
||||
@@ -1,15 +1,14 @@
|
||||
namespace Jellyfin.MediaEncoding.Hls.Playlist
|
||||
namespace Jellyfin.MediaEncoding.Hls.Playlist;
|
||||
|
||||
/// <summary>
|
||||
/// Generator for dynamic HLS playlists where the segment lengths aren't known in advance.
|
||||
/// </summary>
|
||||
public interface IDynamicHlsPlaylistGenerator
|
||||
{
|
||||
/// <summary>
|
||||
/// Generator for dynamic HLS playlists where the segment lengths aren't known in advance.
|
||||
/// Creates the main playlist containing the main video or audio stream.
|
||||
/// </summary>
|
||||
public interface IDynamicHlsPlaylistGenerator
|
||||
{
|
||||
/// <summary>
|
||||
/// Creates the main playlist containing the main video or audio stream.
|
||||
/// </summary>
|
||||
/// <param name="request">An instance of the <see cref="CreateMainPlaylistRequest"/> class.</param>
|
||||
/// <returns>The playlist as a formatted string.</returns>
|
||||
string CreateMainPlaylist(CreateMainPlaylistRequest request);
|
||||
}
|
||||
/// <param name="request">An instance of the <see cref="CreateMainPlaylistRequest"/> class.</param>
|
||||
/// <returns>The playlist as a formatted string.</returns>
|
||||
string CreateMainPlaylist(CreateMainPlaylistRequest request);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user