using MediaBrowser.Api.Playback.Hls; using MediaBrowser.Common.IO; using MediaBrowser.Common.Net; using MediaBrowser.Controller.Configuration; using MediaBrowser.Controller.Devices; using MediaBrowser.Controller.Dlna; using MediaBrowser.Controller.Library; using MediaBrowser.Controller.MediaEncoding; using MediaBrowser.Controller.Net; using MediaBrowser.Model.IO; using MediaBrowser.Model.Serialization; 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 { /// /// Options is needed for chromecast. Threw Head in there since it's related /// [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/{RepresentationId}/{SegmentId}.m4s", "GET")] public class GetDashSegment : VideoStreamRequest { /// /// Gets or sets the segment id. /// /// The segment id. public string SegmentId { get; set; } /// /// Gets or sets the representation identifier. /// /// The representation identifier. public string RepresentationId { get; set; } } public class MpegDashService : BaseHlsService { public MpegDashService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, IJsonSerializer jsonSerializer, INetworkManager networkManager) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, dlnaManager, subtitleEncoder, deviceManager, mediaSourceManager, zipClient, jsonSerializer) { 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 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()); } public object Get(GetDashSegment request) { return GetDynamicSegment(request, request.SegmentId, request.RepresentationId).Result; } private async Task GetDynamicSegment(VideoStreamRequest request, string segmentId, string representationId) { if ((request.StartTimeTicks ?? 0) > 0) { throw new ArgumentException("StartTimeTicks is not allowed."); } var cancellationTokenSource = new CancellationTokenSource(); var cancellationToken = cancellationTokenSource.Token; var requestedIndex = string.Equals(segmentId, "init", StringComparison.OrdinalIgnoreCase) ? -1 : 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 = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex); var segmentLength = state.SegmentLength; TranscodingJob job = null; if (!string.IsNullOrWhiteSpace(segmentPath)) { job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType); return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job, cancellationToken).ConfigureAwait(false); } await ApiEntryPoint.Instance.TranscodingStartLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false); try { segmentPath = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex); if (!string.IsNullOrWhiteSpace(segmentPath)) { job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType); return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job, cancellationToken).ConfigureAwait(false); } else { if (string.Equals(representationId, "0", StringComparison.OrdinalIgnoreCase)) { job = ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType); var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension); var segmentGapRequiringTranscodingChange = 24 / state.SegmentLength; Logger.Debug("Current transcoding index is {0}. requestedIndex={1}. segmentGapRequiringTranscodingChange={2}", currentTranscodingIndex ?? -2, requestedIndex, segmentGapRequiringTranscodingChange); if (currentTranscodingIndex == null || requestedIndex < currentTranscodingIndex.Value || (requestedIndex - currentTranscodingIndex.Value) > segmentGapRequiringTranscodingChange) { // If the playlist doesn't already exist, startup ffmpeg try { ApiEntryPoint.Instance.KillTranscodingJobs(request.DeviceId, request.PlaySessionId, p => false); if (currentTranscodingIndex.HasValue) { DeleteLastTranscodedFiles(playlistPath, 0); } var positionTicks = GetPositionTicks(state, requestedIndex); request.StartTimeTicks = positionTicks; var startNumber = GetStartNumber(state); var workingDirectory = Path.Combine(Path.GetDirectoryName(playlistPath), (startNumber == -1 ? 0 : startNumber).ToString(CultureInfo.InvariantCulture)); state.WaitForPath = Path.Combine(workingDirectory, Path.GetFileName(playlistPath)); Directory.CreateDirectory(workingDirectory); job = await StartFfMpeg(state, playlistPath, cancellationTokenSource, workingDirectory).ConfigureAwait(false); await WaitForMinimumDashSegmentCount(Path.Combine(workingDirectory, Path.GetFileName(playlistPath)), 1, cancellationTokenSource.Token).ConfigureAwait(false); } catch { state.Dispose(); throw; } } } } } finally { ApiEntryPoint.Instance.TranscodingStartLock.Release(); } while (string.IsNullOrWhiteSpace(segmentPath)) { segmentPath = FindSegment(playlistPath, representationId, segmentExtension, requestedIndex); await Task.Delay(50, cancellationToken).ConfigureAwait(false); } Logger.Info("returning {0}", segmentPath); return await GetSegmentResult(playlistPath, segmentPath, requestedIndex, segmentLength, job ?? ApiEntryPoint.Instance.GetTranscodingJob(playlistPath, TranscodingJobType), cancellationToken).ConfigureAwait(false); } private long GetPositionTicks(StreamState state, int requestedIndex) { if (requestedIndex <= 0) { return 0; } var startSeconds = requestedIndex * state.SegmentLength; return TimeSpan.FromSeconds(startSeconds).Ticks; } protected Task WaitForMinimumDashSegmentCount(string playlist, int segmentCount, CancellationToken cancellationToken) { return WaitForSegment(playlist, "stream0-" + segmentCount.ToString("00000", CultureInfo.InvariantCulture) + ".m4s", cancellationToken); } private async Task GetSegmentResult(string playlistPath, string segmentPath, int segmentIndex, int segmentLength, TranscodingJob transcodingJob, CancellationToken cancellationToken) { // If all transcoding has completed, just return immediately if (transcodingJob != null && transcodingJob.HasExited) { return GetSegmentResult(segmentPath, segmentIndex, segmentLength, transcodingJob); } // 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); } } }); } public int? GetCurrentTranscodingIndex(string playlist, string segmentExtension) { var job = ApiEntryPoint.Instance.GetTranscodingJob(playlist, TranscodingJobType); if (job == null || job.HasExited) { return null; } var file = GetLastTranscodingFiles(playlist, segmentExtension, FileSystem, 1).FirstOrDefault(); if (file == null) { return null; } return GetIndex(file.FullName); } public int GetIndex(string segmentPath) { var indexString = Path.GetFileNameWithoutExtension(segmentPath).Split('-').LastOrDefault(); if (string.Equals(indexString, "init", StringComparison.OrdinalIgnoreCase)) { return -1; } var startNumber = int.Parse(Path.GetFileNameWithoutExtension(Path.GetDirectoryName(segmentPath)), NumberStyles.Integer, UsCulture); return startNumber + int.Parse(indexString, NumberStyles.Integer, UsCulture) - 1; } private void DeleteLastTranscodedFiles(string playlistPath, int retryCount) { if (retryCount >= 5) { return; } } private static List GetLastTranscodingFiles(string playlist, string segmentExtension, IFileSystem fileSystem, int count) { var folder = Path.GetDirectoryName(playlist); try { return new DirectoryInfo(folder) .EnumerateFiles("*", SearchOption.AllDirectories) .Where(i => string.Equals(i.Extension, segmentExtension, StringComparison.OrdinalIgnoreCase)) .OrderByDescending(fileSystem.GetLastWriteTimeUtc) .Take(count) .ToList(); } catch (DirectoryNotFoundException) { return new List(); } } private string FindSegment(string playlist, string representationId, string segmentExtension, int requestedIndex) { var folder = Path.GetDirectoryName(playlist); if (requestedIndex == -1) { var path = Path.Combine(folder, "0", "stream" + representationId + "-" + "init" + segmentExtension); return File.Exists(path) ? path : null; } try { foreach (var subfolder in new DirectoryInfo(folder).EnumerateDirectories().ToList()) { var subfolderName = Path.GetFileNameWithoutExtension(subfolder.FullName); int startNumber; if (int.TryParse(subfolderName, NumberStyles.Any, UsCulture, out startNumber)) { var segmentIndex = requestedIndex - startNumber + 1; var path = Path.Combine(folder, subfolderName, "stream" + representationId + "-" + segmentIndex.ToString("00000", CultureInfo.InvariantCulture) + segmentExtension); if (File.Exists(path)) { return path; } } } } catch (DirectoryNotFoundException) { } return null; } protected override string GetAudioArguments(StreamState state) { var codec = GetAudioEncoder(state); if (string.Equals(codec, "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 = GetVideoEncoder(state); 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, 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 initSegmentName = "stream$RepresentationID$-init.m4s"; var segmentName = "stream$RepresentationID$-$Number%05d$.m4s"; var args = string.Format("{0} {1} -map_metadata -1 -threads {2} {3} {4} -copyts {5} -f dash -init_seg_name \"{6}\" -media_seg_name \"{7}\" -use_template 0 -use_timeline 1 -min_seg_duration {8} -y \"{9}\"", inputModifier, GetInputArgument(state), threads, GetMapArgs(state), GetVideoArguments(state), GetAudioArguments(state), initSegmentName, segmentName, (state.SegmentLength * 1000000).ToString(CultureInfo.InvariantCulture), state.WaitForPath ).Trim(); return args; } protected override int GetStartNumber(StreamState state) { return GetStartNumber(state.VideoRequest); } private int GetStartNumber(VideoStreamRequest request) { var segmentId = "0"; var segmentRequest = request as GetDashSegment; if (segmentRequest != null) { segmentId = segmentRequest.SegmentId; } if (string.Equals(segmentId, "init", StringComparison.OrdinalIgnoreCase)) { return -1; } return int.Parse(segmentId, NumberStyles.Integer, UsCulture); } /// /// Gets the segment file extension. /// /// The state. /// System.String. protected override string GetSegmentFileExtension(StreamState state) { return ".m4s"; } protected override TranscodingJobType TranscodingJobType { get { return TranscodingJobType.Dash; } } private async Task WaitForSegment(string playlist, string segment, CancellationToken cancellationToken) { var segmentFilename = Path.GetFileName(segment); Logger.Debug("Waiting for {0} in {1}", segmentFilename, playlist); while (true) { // Need to use FileShare.ReadWrite because we're reading the file at the same time it's being written using (var fileStream = GetPlaylistFileStream(playlist)) { using (var reader = new StreamReader(fileStream)) { while (!reader.EndOfStream) { var line = await reader.ReadLineAsync().ConfigureAwait(false); if (line.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1) { Logger.Debug("Finished waiting for {0} in {1}", segmentFilename, playlist); return; } } await Task.Delay(100, cancellationToken).ConfigureAwait(false); } } } } } }