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-rw-r--r--MediaBrowser.Api/Playback/Dash/MpegDashService.cs550
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diff --git a/MediaBrowser.Api/Playback/Dash/MpegDashService.cs b/MediaBrowser.Api/Playback/Dash/MpegDashService.cs
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+++ b/MediaBrowser.Api/Playback/Dash/MpegDashService.cs
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+using MediaBrowser.Api.Playback.Hls;
+using MediaBrowser.Common.IO;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Devices;
+using MediaBrowser.Controller.Diagnostics;
+using MediaBrowser.Controller.Dlna;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Net;
+using MediaBrowser.Model.IO;
+using ServiceStack;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MimeTypes = MediaBrowser.Model.Net.MimeTypes;
+
+namespace MediaBrowser.Api.Playback.Dash
+{
+ /// <summary>
+ /// Options is needed for chromecast. Threw Head in there since it's related
+ /// </summary>
+ [Route("/Videos/{Id}/master.mpd", "GET", Summary = "Gets a video stream using Mpeg dash.")]
+ [Route("/Videos/{Id}/master.mpd", "HEAD", Summary = "Gets a video stream using Mpeg dash.")]
+ public class GetMasterManifest : VideoStreamRequest
+ {
+ public bool EnableAdaptiveBitrateStreaming { get; set; }
+
+ public GetMasterManifest()
+ {
+ EnableAdaptiveBitrateStreaming = true;
+ }
+ }
+
+ [Route("/Videos/{Id}/dash/{SegmentType}/{SegmentId}.m4s", "GET")]
+ public class GetDashSegment : VideoStreamRequest
+ {
+ /// <summary>
+ /// Gets or sets the segment id.
+ /// </summary>
+ /// <value>The segment id.</value>
+ public string SegmentId { get; set; }
+
+ /// <summary>
+ /// Gets or sets the type of the segment.
+ /// </summary>
+ /// <value>The type of the segment.</value>
+ public string SegmentType { get; set; }
+ }
+
+ public class MpegDashService : BaseHlsService
+ {
+ public MpegDashService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, ILiveTvManager liveTvManager, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IProcessManager processManager, IMediaSourceManager mediaSourceManager, INetworkManager networkManager)
+ : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, liveTvManager, dlnaManager, subtitleEncoder, deviceManager, processManager, mediaSourceManager)
+ {
+ NetworkManager = networkManager;
+ }
+
+ protected INetworkManager NetworkManager { get; private set; }
+
+ public object Get(GetMasterManifest request)
+ {
+ var result = GetAsync(request, "GET").Result;
+
+ return result;
+ }
+
+ public object Head(GetMasterManifest request)
+ {
+ var result = GetAsync(request, "HEAD").Result;
+
+ return result;
+ }
+
+ protected override bool EnableOutputInSubFolder
+ {
+ get
+ {
+ return true;
+ }
+ }
+
+ private async Task<object> GetAsync(GetMasterManifest request, string method)
+ {
+ if (string.IsNullOrEmpty(request.MediaSourceId))
+ {
+ throw new ArgumentException("MediaSourceId is required");
+ }
+
+ var state = await GetState(request, CancellationToken.None).ConfigureAwait(false);
+
+ var playlistText = string.Empty;
+
+ if (string.Equals(method, "GET", StringComparison.OrdinalIgnoreCase))
+ {
+ playlistText = new ManifestBuilder().GetManifestText(state, Request.RawUrl);
+ }
+
+ return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.mpd"), new Dictionary<string, string>());
+ }
+
+ public object Get(GetDashSegment request)
+ {
+ return GetDynamicSegment(request, request.SegmentId, request.SegmentType).Result;
+ }
+
+ private async Task<object> GetDynamicSegment(VideoStreamRequest request, string segmentId, string segmentType)
+ {
+ if ((request.StartTimeTicks ?? 0) > 0)
+ {
+ throw new ArgumentException("StartTimeTicks is not allowed.");
+ }
+
+ var cancellationTokenSource = new CancellationTokenSource();
+ var cancellationToken = cancellationTokenSource.Token;
+
+ var index = int.Parse(segmentId, NumberStyles.Integer, UsCulture);
+
+ var state = await GetState(request, cancellationToken).ConfigureAwait(false);
+
+ var playlistPath = Path.ChangeExtension(state.OutputFilePath, ".mpd");
+
+ var segmentExtension = GetSegmentFileExtension(state);
+
+ var segmentPath = GetSegmentPath(playlistPath, segmentType, segmentExtension, index);
+ var segmentLength = state.SegmentLength;
+
+ TranscodingJob job = null;
+
+ if (File.Exists(segmentPath))
+ {
+ job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
+ return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
+ }
+
+ await ApiEntryPoint.Instance.TranscodingStartLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
+ try
+ {
+ if (File.Exists(segmentPath))
+ {
+ job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
+ return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
+ }
+ else
+ {
+ var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
+
+ if (currentTranscodingIndex == null || index < currentTranscodingIndex.Value || (index - currentTranscodingIndex.Value) > 4)
+ {
+ // If the playlist doesn't already exist, startup ffmpeg
+ try
+ {
+ ApiEntryPoint.Instance.KillTranscodingJobs(j => j.Type == TranscodingJobType && string.Equals(j.DeviceId, request.DeviceId, StringComparison.OrdinalIgnoreCase), p => !string.Equals(p, playlistPath, StringComparison.OrdinalIgnoreCase));
+
+ if (currentTranscodingIndex.HasValue)
+ {
+ DeleteLastFile(playlistPath, segmentExtension, 0);
+ }
+
+ var startSeconds = index * state.SegmentLength;
+ request.StartTimeTicks = TimeSpan.FromSeconds(startSeconds).Ticks;
+
+ job = await StartFfMpeg(state, playlistPath, cancellationTokenSource, Path.GetDirectoryName(playlistPath)).ConfigureAwait(false);
+ }
+ catch
+ {
+ state.Dispose();
+ throw;
+ }
+
+ await WaitForMinimumSegmentCount(playlistPath, 1, cancellationTokenSource.Token).ConfigureAwait(false);
+ }
+ }
+ }
+ finally
+ {
+ ApiEntryPoint.Instance.TranscodingStartLock.Release();
+ }
+
+ Logger.Info("waiting for {0}", segmentPath);
+ while (!File.Exists(segmentPath))
+ {
+ await Task.Delay(50, cancellationToken).ConfigureAwait(false);
+ }
+
+ Logger.Info("returning {0}", segmentPath);
+ job = job ?? ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
+ return await GetSegmentResult(playlistPath, segmentPath, index, segmentLength, job, cancellationToken).ConfigureAwait(false);
+ }
+
+ protected override async Task WaitForMinimumSegmentCount(string playlist, int segmentCount, CancellationToken cancellationToken)
+ {
+ var tmpPath = playlist + ".tmp";
+ Logger.Debug("Waiting for {0} segments in {1}", segmentCount, playlist);
+ // Double since audio and video are split
+ segmentCount = segmentCount * 2;
+ // Account for the initial segments
+ segmentCount += 2;
+
+ while (true)
+ {
+ FileStream fileStream;
+ try
+ {
+ fileStream = FileSystem.GetFileStream(tmpPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
+ }
+ catch (IOException)
+ {
+ fileStream = FileSystem.GetFileStream(playlist, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true);
+ }
+ // Need to use FileShare.ReadWrite because we're reading the file at the same time it's being written
+ using (fileStream)
+ {
+ using (var reader = new StreamReader(fileStream))
+ {
+ var count = 0;
+
+ while (!reader.EndOfStream)
+ {
+ var line = await reader.ReadLineAsync().ConfigureAwait(false);
+
+ if (line.IndexOf(".m4s", StringComparison.OrdinalIgnoreCase) != -1)
+ {
+ count++;
+ if (count >= segmentCount)
+ {
+ Logger.Debug("Finished waiting for {0} segments in {1}", segmentCount, playlist);
+ return;
+ }
+ }
+ }
+ await Task.Delay(100, cancellationToken).ConfigureAwait(false);
+ }
+ }
+ }
+ }
+
+ private async Task<object> GetSegmentResult(string playlistPath,
+ string segmentPath,
+ int segmentIndex,
+ int segmentLength,
+ TranscodingJob transcodingJob,
+ CancellationToken cancellationToken)
+ {
+ // If all transcoding has completed, just return immediately
+ if (!IsTranscoding(playlistPath))
+ {
+ return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
+ }
+
+ var segmentFilename = Path.GetFileName(segmentPath);
+
+ using (var fileStream = FileSystem.GetFileStream(playlistPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true))
+ {
+ using (var reader = new StreamReader(fileStream))
+ {
+ var text = await reader.ReadToEndAsync().ConfigureAwait(false);
+
+ // If it appears in the playlist, it's done
+ if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
+ {
+ return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
+ }
+ }
+ }
+
+ // if a different file is encoding, it's done
+ //var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath);
+ //if (currentTranscodingIndex > segmentIndex)
+ //{
+ //return GetSegmentResult(segmentPath, segmentIndex);
+ //}
+
+ // Wait for the file to stop being written to, then stream it
+ var length = new FileInfo(segmentPath).Length;
+ var eofCount = 0;
+
+ while (eofCount < 10)
+ {
+ var info = new FileInfo(segmentPath);
+
+ if (!info.Exists)
+ {
+ break;
+ }
+
+ var newLength = info.Length;
+
+ if (newLength == length)
+ {
+ eofCount++;
+ }
+ else
+ {
+ eofCount = 0;
+ }
+
+ length = newLength;
+ await Task.Delay(100, cancellationToken).ConfigureAwait(false);
+ }
+
+ return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob);
+ }
+
+ private object GetSegmentResult(string segmentPath, int index, int segmentLength, TranscodingJob transcodingJob)
+ {
+ var segmentEndingSeconds = (1 + index) * segmentLength;
+ var segmentEndingPositionTicks = TimeSpan.FromSeconds(segmentEndingSeconds).Ticks;
+
+ return ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions
+ {
+ Path = segmentPath,
+ FileShare = FileShare.ReadWrite,
+ OnComplete = () =>
+ {
+ if (transcodingJob != null)
+ {
+ transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks);
+ }
+
+ }
+ });
+ }
+
+ private bool IsTranscoding(string playlistPath)
+ {
+ var job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType);
+
+ return job != null && !job.HasExited;
+ }
+
+ public int? GetCurrentTranscodingIndex(string playlist, string segmentExtension)
+ {
+ var file = GetLastTranscodingFile(playlist, segmentExtension, FileSystem);
+
+ if (file == null)
+ {
+ return null;
+ }
+
+ var playlistFilename = Path.GetFileNameWithoutExtension(playlist);
+
+ var indexString = Path.GetFileNameWithoutExtension(file.Name).Substring(playlistFilename.Length);
+
+ return int.Parse(indexString, NumberStyles.Integer, UsCulture);
+ }
+
+ private void DeleteLastFile(string path, string segmentExtension, int retryCount)
+ {
+ if (retryCount >= 5)
+ {
+ return;
+ }
+
+ var file = GetLastTranscodingFile(path, segmentExtension, FileSystem);
+
+ if (file != null)
+ {
+ try
+ {
+ FileSystem.DeleteFile(file.FullName);
+ }
+ catch (IOException ex)
+ {
+ Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, file.FullName);
+
+ Thread.Sleep(100);
+ DeleteLastFile(path, segmentExtension, retryCount + 1);
+ }
+ catch (Exception ex)
+ {
+ Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, file.FullName);
+ }
+ }
+ }
+
+ private static FileInfo GetLastTranscodingFile(string playlist, string segmentExtension, IFileSystem fileSystem)
+ {
+ var folder = Path.GetDirectoryName(playlist);
+
+ try
+ {
+ return new DirectoryInfo(folder)
+ .EnumerateFiles("*", SearchOption.TopDirectoryOnly)
+ .Where(i => string.Equals(i.Extension, segmentExtension, StringComparison.OrdinalIgnoreCase))
+ .OrderByDescending(fileSystem.GetLastWriteTimeUtc)
+ .FirstOrDefault();
+ }
+ catch (DirectoryNotFoundException)
+ {
+ return null;
+ }
+ }
+
+ private string GetSegmentPath(string playlist, string segmentType, string segmentExtension, int index)
+ {
+ var folder = Path.GetDirectoryName(playlist);
+
+ var id = string.Equals(segmentType, "video", StringComparison.OrdinalIgnoreCase)
+ ? "0"
+ : "1";
+
+ string filename;
+
+ if (index == 0)
+ {
+ filename = "init-stream" + id + segmentExtension;
+ }
+ else
+ {
+ var number = index.ToString("00000", CultureInfo.InvariantCulture);
+ filename = "chunk-stream" + id + "-" + number + segmentExtension;
+ }
+
+ return Path.Combine(folder, filename);
+ }
+
+ 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;
+
+ // 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);
+
+ var args = string.Format("{0} {1} -map_metadata -1 -threads {2} {3} {4} -copyts {5} -f dash -use_template 0 -min_seg_duration {6} -y \"{7}\"",
+ inputModifier,
+ GetInputArgument(transcodingJobId, state),
+ threads,
+ GetMapArgs(state),
+ GetVideoArguments(state),
+ GetAudioArguments(state),
+ (state.SegmentLength * 1000000).ToString(CultureInfo.InvariantCulture),
+ outputPath
+ ).Trim();
+
+ return args;
+ }
+
+ //private string GetCurrentTranscodingIndex(string outputPath)
+ //{
+
+ //}
+
+ //private string GetNextTranscodingIndex(string outputPath)
+ //{
+
+ //}
+
+ //private string GetActualPlaylistPath(string outputPath, string transcodingIndex)
+ //{
+
+ //}
+
+ /// <summary>
+ /// Gets the segment file extension.
+ /// </summary>
+ /// <param name="state">The state.</param>
+ /// <returns>System.String.</returns>
+ protected override string GetSegmentFileExtension(StreamState state)
+ {
+ return ".m4s";
+ }
+
+ protected override TranscodingJobType TranscodingJobType
+ {
+ get
+ {
+ return TranscodingJobType.Dash;
+ }
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-15 11:48:02 +0000