676 lines
25 KiB
C#
676 lines
25 KiB
C#
using MediaBrowser.Common.IO;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller.Channels;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Devices;
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using MediaBrowser.Controller.Dlna;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.LiveTv;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Model.IO;
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using ServiceStack;
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Security;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using MimeTypes = MediaBrowser.Model.Net.MimeTypes;
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namespace MediaBrowser.Api.Playback.Hls
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{
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/// <summary>
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/// Options is needed for chromecast. Threw Head in there since it's related
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/// </summary>
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[Route("/Videos/{Id}/master.mpd", "GET", Summary = "Gets a video stream using Mpeg dash.")]
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[Route("/Videos/{Id}/master.mpd", "HEAD", Summary = "Gets a video stream using Mpeg dash.")]
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public class GetMasterManifest : VideoStreamRequest
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{
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public bool EnableAdaptiveBitrateStreaming { get; set; }
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public GetMasterManifest()
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{
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EnableAdaptiveBitrateStreaming = true;
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}
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}
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[Route("/Videos/{Id}/dash/{SegmentId}.ts", "GET")]
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[Route("/Videos/{Id}/dash/{SegmentId}.mp4", "GET")]
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public class GetDashSegment : VideoStreamRequest
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{
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/// <summary>
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/// Gets or sets the segment id.
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/// </summary>
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/// <value>The segment id.</value>
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public string SegmentId { get; set; }
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}
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public class MpegDashService : BaseHlsService
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{
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public MpegDashService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, ILiveTvManager liveTvManager, IDlnaManager dlnaManager, IChannelManager channelManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, INetworkManager networkManager) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, liveTvManager, dlnaManager, channelManager, subtitleEncoder, deviceManager)
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{
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NetworkManager = networkManager;
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}
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protected INetworkManager NetworkManager { get; private set; }
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public object Get(GetMasterManifest request)
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{
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var result = GetAsync(request, "GET").Result;
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return result;
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}
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public object Head(GetMasterManifest request)
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{
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var result = GetAsync(request, "HEAD").Result;
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return result;
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}
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private async Task<object> GetAsync(GetMasterManifest request, string method)
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{
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if (string.Equals(request.AudioCodec, "copy", StringComparison.OrdinalIgnoreCase))
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{
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throw new ArgumentException("Audio codec copy is not allowed here.");
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}
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if (string.Equals(request.VideoCodec, "copy", StringComparison.OrdinalIgnoreCase))
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{
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throw new ArgumentException("Video codec copy is not allowed here.");
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}
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if (string.IsNullOrEmpty(request.MediaSourceId))
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{
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throw new ArgumentException("MediaSourceId is required");
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}
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var state = await GetState(request, CancellationToken.None).ConfigureAwait(false);
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var playlistText = string.Empty;
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if (string.Equals(method, "GET", StringComparison.OrdinalIgnoreCase))
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{
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playlistText = GetManifestText(state);
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}
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return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.mpd"), new Dictionary<string, string>());
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}
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private string GetManifestText(StreamState state)
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{
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var builder = new StringBuilder();
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var time = TimeSpan.FromTicks(state.RunTimeTicks.Value);
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var duration = "PT" + time.Hours.ToString("00", UsCulture) + "H" + time.Minutes.ToString("00", UsCulture) + "M" + time.Seconds.ToString("00", UsCulture) + ".00S";
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builder.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
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var profile = string.Equals(GetSegmentFileExtension(state), ".ts", StringComparison.OrdinalIgnoreCase)
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? "urn:mpeg:dash:profile:mp2t-simple:2011"
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: "urn:mpeg:dash:profile:mp2t-simple:2011";
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builder.AppendFormat(
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"<MPD xmlns=\"urn:mpeg:dash:schema:mpd:2011\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"urn:mpeg:dash:schema:mpd:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\" minBufferTime=\"PT2.00S\" mediaPresentationDuration=\"{0}\" maxSegmentDuration=\"PT{1}S\" type=\"static\" profiles=\""+profile+"\">",
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duration,
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state.SegmentLength.ToString(CultureInfo.InvariantCulture));
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builder.Append("<ProgramInformation moreInformationURL=\"http://gpac.sourceforge.net\">");
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builder.Append("</ProgramInformation>");
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builder.AppendFormat("<Period start=\"PT0S\" duration=\"{0}\">", duration);
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builder.Append("<AdaptationSet segmentAlignment=\"true\">");
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builder.Append("<ContentComponent id=\"1\" contentType=\"video\"/>");
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var lang = state.AudioStream != null ? state.AudioStream.Language : null;
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if (string.IsNullOrWhiteSpace(lang)) lang = "und";
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builder.AppendFormat("<ContentComponent id=\"2\" contentType=\"audio\" lang=\"{0}\"/>", lang);
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builder.Append(GetRepresentationOpenElement(state, lang));
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AppendSegmentList(state, builder);
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builder.Append("</Representation>");
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builder.Append("</AdaptationSet>");
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builder.Append("</Period>");
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builder.Append("</MPD>");
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return builder.ToString();
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}
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private string GetRepresentationOpenElement(StreamState state, string language)
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{
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var codecs = GetVideoCodecDescriptor(state) + "," + GetAudioCodecDescriptor(state);
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var mime = string.Equals(GetSegmentFileExtension(state), ".ts", StringComparison.OrdinalIgnoreCase)
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? "video/mp2t"
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: "video/mp4";
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var xml = "<Representation id=\"1\" mimeType=\"" + mime + "\" startWithSAP=\"1\" codecs=\"" + codecs + "\"";
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if (state.OutputWidth.HasValue)
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{
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xml += " width=\"" + state.OutputWidth.Value.ToString(UsCulture) + "\"";
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}
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if (state.OutputHeight.HasValue)
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{
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xml += " height=\"" + state.OutputHeight.Value.ToString(UsCulture) + "\"";
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}
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if (state.OutputAudioSampleRate.HasValue)
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{
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xml += " sampleRate=\"" + state.OutputAudioSampleRate.Value.ToString(UsCulture) + "\"";
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}
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if (state.TotalOutputBitrate.HasValue)
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{
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xml += " bandwidth=\"" + state.TotalOutputBitrate.Value.ToString(UsCulture) + "\"";
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}
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xml += ">";
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return xml;
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}
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private string GetVideoCodecDescriptor(StreamState state)
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{
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// https://developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/FrequentlyAskedQuestions/FrequentlyAskedQuestions.html
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// http://www.chipwreck.de/blog/2010/02/25/html-5-video-tag-and-attributes/
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var level = state.TargetVideoLevel ?? 0;
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var profile = state.TargetVideoProfile ?? string.Empty;
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if (profile.IndexOf("high", StringComparison.OrdinalIgnoreCase) != -1)
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{
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if (level >= 4.1)
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{
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return "avc1.640028";
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}
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if (level >= 4)
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{
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return "avc1.640028";
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}
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return "avc1.64001f";
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}
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if (profile.IndexOf("main", StringComparison.OrdinalIgnoreCase) != -1)
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{
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if (level >= 4)
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{
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return "avc1.4d0028";
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}
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if (level >= 3.1)
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{
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return "avc1.4d001f";
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}
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return "avc1.4d001e";
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}
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if (level >= 3.1)
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{
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return "avc1.42001f";
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}
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return "avc1.42E01E";
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}
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private string GetAudioCodecDescriptor(StreamState state)
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{
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// https://developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/FrequentlyAskedQuestions/FrequentlyAskedQuestions.html
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if (string.Equals(state.OutputAudioCodec, "mp3", StringComparison.OrdinalIgnoreCase))
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{
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return "mp4a.40.34";
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}
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// AAC 5ch
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if (state.OutputAudioChannels.HasValue && state.OutputAudioChannels.Value >= 5)
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{
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return "mp4a.40.5";
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}
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// AAC 2ch
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return "mp4a.40.2";
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}
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public object Get(GetDashSegment request)
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{
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return GetDynamicSegment(request, request.SegmentId).Result;
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}
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private void AppendSegmentList(StreamState state, StringBuilder builder)
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{
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var extension = GetSegmentFileExtension(state);
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var seconds = TimeSpan.FromTicks(state.RunTimeTicks ?? 0).TotalSeconds;
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var queryStringIndex = Request.RawUrl.IndexOf('?');
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var queryString = queryStringIndex == -1 ? string.Empty : Request.RawUrl.Substring(queryStringIndex);
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var index = 0;
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builder.Append("<SegmentList timescale=\"1000\" duration=\"10000\">");
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while (seconds > 0)
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{
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var segmentUrl = string.Format("dash/{0}{1}{2}",
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index.ToString(UsCulture),
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extension,
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SecurityElement.Escape(queryString));
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if (index == 0)
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{
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builder.AppendFormat("<Initialization sourceURL=\"{0}\"/>", segmentUrl);
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}
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else
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{
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builder.AppendFormat("<SegmentURL media=\"{0}\"/>", segmentUrl);
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}
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seconds -= state.SegmentLength;
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index++;
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}
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builder.Append("</SegmentList>");
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}
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private async Task<object> GetDynamicSegment(VideoStreamRequest request, string segmentId)
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{
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if ((request.StartTimeTicks ?? 0) > 0)
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{
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throw new ArgumentException("StartTimeTicks is not allowed.");
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}
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var cancellationTokenSource = new CancellationTokenSource();
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var cancellationToken = cancellationTokenSource.Token;
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var index = int.Parse(segmentId, NumberStyles.Integer, UsCulture);
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var state = await GetState(request, cancellationToken).ConfigureAwait(false);
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var playlistPath = Path.ChangeExtension(state.OutputFilePath, ".m3u8");
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var segmentExtension = GetSegmentFileExtension(state);
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var segmentPath = GetSegmentPath(playlistPath, segmentExtension, index);
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var segmentLength = state.SegmentLength;
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TranscodingJob job = null;
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if (File.Exists(segmentPath))
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{
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return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
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}
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await ApiEntryPoint.Instance.TranscodingStartLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
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try
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{
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if (File.Exists(segmentPath))
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{
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return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
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}
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else
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{
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var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
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if (currentTranscodingIndex == null || index < currentTranscodingIndex.Value || (index - currentTranscodingIndex.Value) > 4)
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{
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// If the playlist doesn't already exist, startup ffmpeg
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try
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{
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ApiEntryPoint.Instance.KillTranscodingJobs(j => j.Type == TranscodingJobType && string.Equals(j.DeviceId, request.DeviceId, StringComparison.OrdinalIgnoreCase), p => !string.Equals(p, playlistPath, StringComparison.OrdinalIgnoreCase));
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if (currentTranscodingIndex.HasValue)
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{
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DeleteLastFile(playlistPath, segmentExtension, 0);
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}
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var startSeconds = index * state.SegmentLength;
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request.StartTimeTicks = TimeSpan.FromSeconds(startSeconds).Ticks;
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job = await StartFfMpeg(state, playlistPath, cancellationTokenSource, Path.GetDirectoryName(playlistPath)).ConfigureAwait(false);
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}
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catch
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{
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state.Dispose();
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throw;
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}
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await WaitForMinimumSegmentCount(playlistPath, 2, cancellationTokenSource.Token).ConfigureAwait(false);
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}
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}
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}
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finally
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{
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ApiEntryPoint.Instance.TranscodingStartLock.Release();
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}
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Logger.Info("waiting for {0}", segmentPath);
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while (!File.Exists(segmentPath))
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{
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await Task.Delay(50, cancellationToken).ConfigureAwait(false);
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}
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Logger.Info("returning {0}", segmentPath);
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job = job ?? ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
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return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
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}
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private async Task<object> GetSegmentResult(string playlistPath,
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string segmentPath,
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int segmentIndex,
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int segmentLength,
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TranscodingJob transcodingJob,
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CancellationToken cancellationToken)
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{
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// If all transcoding has completed, just return immediately
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if (!IsTranscoding(playlistPath))
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{
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return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
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}
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var segmentFilename = Path.GetFileName(segmentPath);
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using (var fileStream = FileSystem.GetFileStream(playlistPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true))
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{
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using (var reader = new StreamReader(fileStream))
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{
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var text = await reader.ReadToEndAsync().ConfigureAwait(false);
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// If it appears in the playlist, it's done
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if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
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{
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return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
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}
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}
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}
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// if a different file is encoding, it's done
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//var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath);
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//if (currentTranscodingIndex > segmentIndex)
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//{
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//return GetSegmentResult(segmentPath, segmentIndex);
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//}
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// Wait for the file to stop being written to, then stream it
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var length = new FileInfo(segmentPath).Length;
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var eofCount = 0;
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while (eofCount < 10)
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{
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var info = new FileInfo(segmentPath);
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if (!info.Exists)
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{
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break;
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}
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var newLength = info.Length;
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if (newLength == length)
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{
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eofCount++;
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}
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else
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{
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eofCount = 0;
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}
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length = newLength;
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await Task.Delay(100, cancellationToken).ConfigureAwait(false);
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}
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return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
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}
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private object GetSegmentResult(string segmentPath, int index, int segmentLength, TranscodingJob transcodingJob)
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{
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var segmentEndingSeconds = (1 + index) * segmentLength;
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var segmentEndingPositionTicks = TimeSpan.FromSeconds(segmentEndingSeconds).Ticks;
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return ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions
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{
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Path = segmentPath,
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FileShare = FileShare.ReadWrite,
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OnComplete = () =>
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{
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if (transcodingJob != null)
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{
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transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks);
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}
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}
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});
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}
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private bool IsTranscoding(string playlistPath)
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{
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var job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
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return job != null && !job.HasExited;
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}
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public int? GetCurrentTranscodingIndex(string playlist, string segmentExtension)
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{
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var file = GetLastTranscodingFile(playlist, segmentExtension, FileSystem);
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if (file == null)
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{
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return null;
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}
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var playlistFilename = Path.GetFileNameWithoutExtension(playlist);
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var indexString = Path.GetFileNameWithoutExtension(file.Name).Substring(playlistFilename.Length);
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return int.Parse(indexString, NumberStyles.Integer, UsCulture);
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}
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private void DeleteLastFile(string path, string segmentExtension, int retryCount)
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{
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if (retryCount >= 5)
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{
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return;
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}
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var file = GetLastTranscodingFile(path, segmentExtension, FileSystem);
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if (file != null)
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{
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try
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{
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FileSystem.DeleteFile(file.FullName);
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}
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catch (IOException ex)
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{
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Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, file.FullName);
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Thread.Sleep(100);
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DeleteLastFile(path, segmentExtension, retryCount + 1);
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, file.FullName);
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}
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}
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}
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private static FileInfo GetLastTranscodingFile(string playlist, string segmentExtension, IFileSystem fileSystem)
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{
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var folder = Path.GetDirectoryName(playlist);
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try
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{
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return new DirectoryInfo(folder)
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.EnumerateFiles("*", SearchOption.TopDirectoryOnly)
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.Where(i => string.Equals(i.Extension, segmentExtension, StringComparison.OrdinalIgnoreCase))
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.OrderByDescending(fileSystem.GetLastWriteTimeUtc)
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.FirstOrDefault();
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}
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catch (DirectoryNotFoundException)
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{
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return null;
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}
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}
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protected override int GetStartNumber(StreamState state)
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{
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return GetStartNumber(state.VideoRequest);
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}
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private int GetStartNumber(VideoStreamRequest request)
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{
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var segmentId = "0";
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var segmentRequest = request as GetDynamicHlsVideoSegment;
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if (segmentRequest != null)
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{
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segmentId = segmentRequest.SegmentId;
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|
}
|
|
|
|
return int.Parse(segmentId, NumberStyles.Integer, UsCulture);
|
|
}
|
|
|
|
private string GetSegmentPath(string playlist, string segmentExtension, int index)
|
|
{
|
|
var folder = Path.GetDirectoryName(playlist);
|
|
|
|
var filename = Path.GetFileNameWithoutExtension(playlist);
|
|
|
|
return Path.Combine(folder, filename + index.ToString("000", UsCulture) + segmentExtension);
|
|
}
|
|
|
|
protected override string GetAudioArguments(StreamState state)
|
|
{
|
|
var codec = state.OutputAudioCodec;
|
|
|
|
if (codec.Equals("copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return "-codec:a:0 copy";
|
|
}
|
|
|
|
var args = "-codec:a:0 " + codec;
|
|
|
|
var channels = state.OutputAudioChannels;
|
|
|
|
if (channels.HasValue)
|
|
{
|
|
args += " -ac " + channels.Value;
|
|
}
|
|
|
|
var bitrate = state.OutputAudioBitrate;
|
|
|
|
if (bitrate.HasValue)
|
|
{
|
|
args += " -ab " + bitrate.Value.ToString(UsCulture);
|
|
}
|
|
|
|
args += " " + GetAudioFilterParam(state, true);
|
|
|
|
return args;
|
|
}
|
|
|
|
protected override string GetVideoArguments(StreamState state)
|
|
{
|
|
var codec = state.OutputVideoCodec;
|
|
|
|
var args = "-codec:v:0 " + codec;
|
|
|
|
if (state.EnableMpegtsM2TsMode)
|
|
{
|
|
args += " -mpegts_m2ts_mode 1";
|
|
}
|
|
|
|
// See if we can save come cpu cycles by avoiding encoding
|
|
if (codec.Equals("copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return state.VideoStream != null && IsH264(state.VideoStream) ?
|
|
args + " -bsf:v h264_mp4toannexb" :
|
|
args;
|
|
}
|
|
|
|
var keyFrameArg = string.Format(" -force_key_frames expr:gte(t,n_forced*{0})",
|
|
state.SegmentLength.ToString(UsCulture));
|
|
|
|
var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream;
|
|
|
|
args+= " " + GetVideoQualityParam(state, H264Encoder, true) + keyFrameArg;
|
|
|
|
args += " -r 24 -g 24";
|
|
|
|
// Add resolution params, if specified
|
|
if (!hasGraphicalSubs)
|
|
{
|
|
args += GetOutputSizeParam(state, codec, false);
|
|
}
|
|
|
|
// This is for internal graphical subs
|
|
if (hasGraphicalSubs)
|
|
{
|
|
args += GetGraphicalSubtitleParam(state, codec);
|
|
}
|
|
|
|
return args;
|
|
}
|
|
|
|
protected override string GetCommandLineArguments(string outputPath, string transcodingJobId, StreamState state, bool isEncoding)
|
|
{
|
|
// test url http://192.168.1.2:8096/videos/233e8905d559a8f230db9bffd2ac9d6d/master.mpd?mediasourceid=233e8905d559a8f230db9bffd2ac9d6d&videocodec=h264&audiocodec=aac&maxwidth=1280&videobitrate=500000&audiobitrate=128000&profile=baseline&level=3
|
|
// Good info on i-frames http://blog.streamroot.io/encode-multi-bitrate-videos-mpeg-dash-mse-based-media-players/
|
|
|
|
var threads = GetNumberOfThreads(state, false);
|
|
|
|
var inputModifier = GetInputModifier(state);
|
|
|
|
// If isEncoding is true we're actually starting ffmpeg
|
|
var startNumberParam = isEncoding ? GetStartNumber(state).ToString(UsCulture) : "0";
|
|
|
|
var segmentFilename = Path.GetFileNameWithoutExtension(outputPath) + "%03d" + GetSegmentFileExtension(state);
|
|
|
|
var args = string.Format("{0} {1} -map_metadata -1 -threads {2} {3} {4} -copyts {5} -f ssegment -segment_time {6} -segment_list_size {8} -segment_list \"{9}\" {10}",
|
|
inputModifier,
|
|
GetInputArgument(transcodingJobId, state),
|
|
threads,
|
|
GetMapArgs(state),
|
|
GetVideoArguments(state),
|
|
GetAudioArguments(state),
|
|
state.SegmentLength.ToString(UsCulture),
|
|
startNumberParam,
|
|
state.HlsListSize.ToString(UsCulture),
|
|
outputPath,
|
|
segmentFilename
|
|
).Trim();
|
|
|
|
return args;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the segment file extension.
|
|
/// </summary>
|
|
/// <param name="state">The state.</param>
|
|
/// <returns>System.String.</returns>
|
|
protected override string GetSegmentFileExtension(StreamState state)
|
|
{
|
|
return ".mp4";
|
|
}
|
|
|
|
protected override TranscodingJobType TranscodingJobType
|
|
{
|
|
get
|
|
{
|
|
return TranscodingJobType.Dash;
|
|
}
|
|
}
|
|
}
|
|
}
|