diff options
Diffstat (limited to 'MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs')
| -rw-r--r-- | MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs | 1230 |
1 files changed, 0 insertions, 1230 deletions
diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs deleted file mode 100644 index fe5f980b1..000000000 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ /dev/null @@ -1,1230 +0,0 @@ -using System; -using System.Collections.Generic; -using System.Globalization; -using System.IO; -using System.Linq; -using System.Text; -using System.Threading; -using System.Threading.Tasks; -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.Configuration; -using MediaBrowser.Model.Dlna; -using MediaBrowser.Model.Entities; -using MediaBrowser.Model.IO; -using MediaBrowser.Model.Serialization; -using MediaBrowser.Model.Services; -using Microsoft.Extensions.Logging; -using MimeTypes = MediaBrowser.Model.Net.MimeTypes; - -namespace MediaBrowser.Api.Playback.Hls -{ - /// <summary> - /// Options is needed for chromecast. Threw Head in there since it's related - /// </summary> - [Route("/Videos/{Id}/master.m3u8", "GET", Summary = "Gets a video stream using HTTP live streaming.")] - [Route("/Videos/{Id}/master.m3u8", "HEAD", Summary = "Gets a video stream using HTTP live streaming.")] - public class GetMasterHlsVideoPlaylist : VideoStreamRequest, IMasterHlsRequest - { - public bool EnableAdaptiveBitrateStreaming { get; set; } - - public GetMasterHlsVideoPlaylist() - { - EnableAdaptiveBitrateStreaming = true; - } - } - - [Route("/Audio/{Id}/master.m3u8", "GET", Summary = "Gets an audio stream using HTTP live streaming.")] - [Route("/Audio/{Id}/master.m3u8", "HEAD", Summary = "Gets an audio stream using HTTP live streaming.")] - public class GetMasterHlsAudioPlaylist : StreamRequest, IMasterHlsRequest - { - public bool EnableAdaptiveBitrateStreaming { get; set; } - - public GetMasterHlsAudioPlaylist() - { - EnableAdaptiveBitrateStreaming = true; - } - } - - public interface IMasterHlsRequest - { - bool EnableAdaptiveBitrateStreaming { get; set; } - } - - [Route("/Videos/{Id}/main.m3u8", "GET", Summary = "Gets a video stream using HTTP live streaming.")] - public class GetVariantHlsVideoPlaylist : VideoStreamRequest - { - } - - [Route("/Audio/{Id}/main.m3u8", "GET", Summary = "Gets an audio stream using HTTP live streaming.")] - public class GetVariantHlsAudioPlaylist : StreamRequest - { - } - - [Route("/Videos/{Id}/hls1/{PlaylistId}/{SegmentId}.{SegmentContainer}", "GET")] - public class GetHlsVideoSegment : VideoStreamRequest - { - public string PlaylistId { get; set; } - - /// <summary> - /// Gets or sets the segment id. - /// </summary> - /// <value>The segment id.</value> - public string SegmentId { get; set; } - } - - [Route("/Audio/{Id}/hls1/{PlaylistId}/{SegmentId}.{SegmentContainer}", "GET")] - public class GetHlsAudioSegment : StreamRequest - { - public string PlaylistId { get; set; } - - /// <summary> - /// Gets or sets the segment id. - /// </summary> - /// <value>The segment id.</value> - public string SegmentId { get; set; } - } - - [Authenticated] - public class DynamicHlsService : BaseHlsService - { - public DynamicHlsService( - ILogger<DynamicHlsService> logger, - IServerConfigurationManager serverConfigurationManager, - IHttpResultFactory httpResultFactory, - IUserManager userManager, - ILibraryManager libraryManager, - IIsoManager isoManager, - IMediaEncoder mediaEncoder, - IFileSystem fileSystem, - IDlnaManager dlnaManager, - IDeviceManager deviceManager, - IMediaSourceManager mediaSourceManager, - IJsonSerializer jsonSerializer, - IAuthorizationContext authorizationContext, - INetworkManager networkManager, - EncodingHelper encodingHelper) - : base( - logger, - serverConfigurationManager, - httpResultFactory, - userManager, - libraryManager, - isoManager, - mediaEncoder, - fileSystem, - dlnaManager, - deviceManager, - mediaSourceManager, - jsonSerializer, - authorizationContext, - encodingHelper) - { - NetworkManager = networkManager; - } - - protected INetworkManager NetworkManager { get; private set; } - - public Task<object> Get(GetMasterHlsVideoPlaylist request) - { - return GetMasterPlaylistInternal(request, "GET"); - } - - public Task<object> Head(GetMasterHlsVideoPlaylist request) - { - return GetMasterPlaylistInternal(request, "HEAD"); - } - - public Task<object> Get(GetMasterHlsAudioPlaylist request) - { - return GetMasterPlaylistInternal(request, "GET"); - } - - public Task<object> Head(GetMasterHlsAudioPlaylist request) - { - return GetMasterPlaylistInternal(request, "HEAD"); - } - - public Task<object> Get(GetVariantHlsVideoPlaylist request) - { - return GetVariantPlaylistInternal(request, true, "main"); - } - - public Task<object> Get(GetVariantHlsAudioPlaylist request) - { - return GetVariantPlaylistInternal(request, false, "main"); - } - - public Task<object> Get(GetHlsVideoSegment request) - { - return GetDynamicSegment(request, request.SegmentId); - } - - public Task<object> Get(GetHlsAudioSegment request) - { - return GetDynamicSegment(request, request.SegmentId); - } - - private async Task<object> GetDynamicSegment(StreamRequest request, string segmentId) - { - if ((request.StartTimeTicks ?? 0) > 0) - { - throw new ArgumentException("StartTimeTicks is not allowed."); - } - - var cancellationTokenSource = new CancellationTokenSource(); - var cancellationToken = cancellationTokenSource.Token; - - var requestedIndex = int.Parse(segmentId, NumberStyles.Integer, CultureInfo.InvariantCulture); - - var state = await GetState(request, cancellationToken).ConfigureAwait(false); - - var playlistPath = Path.ChangeExtension(state.OutputFilePath, ".m3u8"); - - var segmentPath = GetSegmentPath(state, playlistPath, requestedIndex); - - var segmentExtension = GetSegmentFileExtension(state.Request); - - TranscodingJob job = null; - - if (File.Exists(segmentPath)) - { - job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType); - Logger.LogDebug("returning {0} [it exists, try 1]", segmentPath); - return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false); - } - - var transcodingLock = ApiEntryPoint.Instance.GetTranscodingLock(playlistPath); - await transcodingLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false); - var released = false; - var startTranscoding = false; - - try - { - if (File.Exists(segmentPath)) - { - job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType); - transcodingLock.Release(); - released = true; - Logger.LogDebug("returning {0} [it exists, try 2]", segmentPath); - return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false); - } - else - { - var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension); - var segmentGapRequiringTranscodingChange = 24 / state.SegmentLength; - - if (currentTranscodingIndex == null) - { - Logger.LogDebug("Starting transcoding because currentTranscodingIndex=null"); - startTranscoding = true; - } - else if (requestedIndex < currentTranscodingIndex.Value) - { - Logger.LogDebug("Starting transcoding because requestedIndex={0} and currentTranscodingIndex={1}", requestedIndex, currentTranscodingIndex); - startTranscoding = true; - } - else if (requestedIndex - currentTranscodingIndex.Value > segmentGapRequiringTranscodingChange) - { - Logger.LogDebug("Starting transcoding because segmentGap is {0} and max allowed gap is {1}. requestedIndex={2}", requestedIndex - currentTranscodingIndex.Value, segmentGapRequiringTranscodingChange, requestedIndex); - startTranscoding = true; - } - - if (startTranscoding) - { - // If the playlist doesn't already exist, startup ffmpeg - try - { - await ApiEntryPoint.Instance.KillTranscodingJobs(request.DeviceId, request.PlaySessionId, p => false); - - if (currentTranscodingIndex.HasValue) - { - DeleteLastFile(playlistPath, segmentExtension, 0); - } - - request.StartTimeTicks = GetStartPositionTicks(state, requestedIndex); - - state.WaitForPath = segmentPath; - job = await StartFfMpeg(state, playlistPath, cancellationTokenSource).ConfigureAwait(false); - } - catch - { - state.Dispose(); - throw; - } - - // await WaitForMinimumSegmentCount(playlistPath, 1, cancellationTokenSource.Token).ConfigureAwait(false); - } - else - { - job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType); - if (job.TranscodingThrottler != null) - { - await job.TranscodingThrottler.UnpauseTranscoding(); - } - } - } - } - finally - { - if (!released) - { - transcodingLock.Release(); - } - } - - // Logger.LogInformation("waiting for {0}", segmentPath); - // while (!File.Exists(segmentPath)) - //{ - // await Task.Delay(50, cancellationToken).ConfigureAwait(false); - //} - - Logger.LogDebug("returning {0} [general case]", segmentPath); - job ??= ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType); - return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false); - } - - private const int BufferSize = 81920; - - private long GetStartPositionTicks(StreamState state, int requestedIndex) - { - double startSeconds = 0; - var lengths = GetSegmentLengths(state); - - if (requestedIndex >= lengths.Length) - { - var msg = string.Format("Invalid segment index requested: {0} - Segment count: {1}", requestedIndex, lengths.Length); - throw new ArgumentException(msg); - } - - for (var i = 0; i < requestedIndex; i++) - { - startSeconds += lengths[i]; - } - - var position = TimeSpan.FromSeconds(startSeconds).Ticks; - return position; - } - - private long GetEndPositionTicks(StreamState state, int requestedIndex) - { - double startSeconds = 0; - var lengths = GetSegmentLengths(state); - - if (requestedIndex >= lengths.Length) - { - var msg = string.Format("Invalid segment index requested: {0} - Segment count: {1}", requestedIndex, lengths.Length); - throw new ArgumentException(msg); - } - - for (var i = 0; i <= requestedIndex; i++) - { - startSeconds += lengths[i]; - } - - var position = TimeSpan.FromSeconds(startSeconds).Ticks; - return position; - } - - private double[] GetSegmentLengths(StreamState state) - { - var result = new List<double>(); - - var ticks = state.RunTimeTicks ?? 0; - - var segmentLengthTicks = TimeSpan.FromSeconds(state.SegmentLength).Ticks; - - while (ticks > 0) - { - var length = ticks >= segmentLengthTicks ? segmentLengthTicks : ticks; - - result.Add(TimeSpan.FromTicks(length).TotalSeconds); - - ticks -= length; - } - - return result.ToArray(); - } - - public int? GetCurrentTranscodingIndex(string playlist, string segmentExtension) - { - var job = ApiEntryPoint.Instance.GetTranscodingJob(playlist, TranscodingJobType); - - if (job == null || job.HasExited) - { - return null; - } - - 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, CultureInfo.InvariantCulture); - } - - private void DeleteLastFile(string playlistPath, string segmentExtension, int retryCount) - { - var file = GetLastTranscodingFile(playlistPath, segmentExtension, FileSystem); - - if (file != null) - { - DeleteFile(file.FullName, retryCount); - } - } - - private void DeleteFile(string path, int retryCount) - { - if (retryCount >= 5) - { - return; - } - - Logger.LogDebug("Deleting partial HLS file {path}", path); - - try - { - FileSystem.DeleteFile(path); - } - catch (IOException ex) - { - Logger.LogError(ex, "Error deleting partial stream file(s) {path}", path); - - var task = Task.Delay(100); - Task.WaitAll(task); - DeleteFile(path, retryCount + 1); - } - catch (Exception ex) - { - Logger.LogError(ex, "Error deleting partial stream file(s) {path}", path); - } - } - - private static FileSystemMetadata GetLastTranscodingFile(string playlist, string segmentExtension, IFileSystem fileSystem) - { - var folder = Path.GetDirectoryName(playlist); - - var filePrefix = Path.GetFileNameWithoutExtension(playlist) ?? string.Empty; - - try - { - return fileSystem.GetFiles(folder, new[] { segmentExtension }, true, false) - .Where(i => Path.GetFileNameWithoutExtension(i.Name).StartsWith(filePrefix, StringComparison.OrdinalIgnoreCase)) - .OrderByDescending(fileSystem.GetLastWriteTimeUtc) - .FirstOrDefault(); - } - catch (IOException) - { - return null; - } - } - - protected override int GetStartNumber(StreamState state) - { - return GetStartNumber(state.VideoRequest); - } - - private int GetStartNumber(VideoStreamRequest request) - { - var segmentId = "0"; - - if (request is GetHlsVideoSegment segmentRequest) - { - segmentId = segmentRequest.SegmentId; - } - - return int.Parse(segmentId, NumberStyles.Integer, CultureInfo.InvariantCulture); - } - - private string GetSegmentPath(StreamState state, string playlist, int index) - { - var folder = Path.GetDirectoryName(playlist); - - var filename = Path.GetFileNameWithoutExtension(playlist); - - return Path.Combine(folder, filename + index.ToString(CultureInfo.InvariantCulture) + GetSegmentFileExtension(state.Request)); - } - - private async Task<object> GetSegmentResult(StreamState state, - string playlistPath, - string segmentPath, - string segmentExtension, - int segmentIndex, - TranscodingJob transcodingJob, - CancellationToken cancellationToken) - { - var segmentExists = File.Exists(segmentPath); - if (segmentExists) - { - if (transcodingJob != null && transcodingJob.HasExited) - { - // Transcoding job is over, so assume all existing files are ready - Logger.LogDebug("serving up {0} as transcode is over", segmentPath); - return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false); - } - - var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension); - - // If requested segment is less than transcoding position, we can't transcode backwards, so assume it's ready - if (segmentIndex < currentTranscodingIndex) - { - Logger.LogDebug("serving up {0} as transcode index {1} is past requested point {2}", segmentPath, currentTranscodingIndex, segmentIndex); - return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false); - } - } - - var nextSegmentPath = GetSegmentPath(state, playlistPath, segmentIndex + 1); - if (transcodingJob != null) - { - while (!cancellationToken.IsCancellationRequested && !transcodingJob.HasExited) - { - // To be considered ready, the segment file has to exist AND - // either the transcoding job should be done or next segment should also exist - if (segmentExists) - { - if (transcodingJob.HasExited || File.Exists(nextSegmentPath)) - { - Logger.LogDebug("serving up {0} as it deemed ready", segmentPath); - return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false); - } - } - else - { - segmentExists = File.Exists(segmentPath); - if (segmentExists) - { - continue; // avoid unnecessary waiting if segment just became available - } - } - - await Task.Delay(100, cancellationToken).ConfigureAwait(false); - } - - if (!File.Exists(segmentPath)) - { - Logger.LogWarning("cannot serve {0} as transcoding quit before we got there", segmentPath); - } - else - { - Logger.LogDebug("serving {0} as it's on disk and transcoding stopped", segmentPath); - } - - cancellationToken.ThrowIfCancellationRequested(); - } - else - { - Logger.LogWarning("cannot serve {0} as it doesn't exist and no transcode is running", segmentPath); - } - - return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false); - } - - private Task<object> GetSegmentResult(StreamState state, string segmentPath, int index, TranscodingJob transcodingJob) - { - var segmentEndingPositionTicks = GetEndPositionTicks(state, index); - - return ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions - { - Path = segmentPath, - FileShare = FileShare.ReadWrite, - OnComplete = () => - { - Logger.LogDebug("finished serving {0}", segmentPath); - if (transcodingJob != null) - { - transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks); - ApiEntryPoint.Instance.OnTranscodeEndRequest(transcodingJob); - } - } - }); - } - - private async Task<object> GetMasterPlaylistInternal(StreamRequest request, string method) - { - var state = await GetState(request, CancellationToken.None).ConfigureAwait(false); - - if (string.IsNullOrEmpty(request.MediaSourceId)) - { - throw new ArgumentException("MediaSourceId is required"); - } - - var playlistText = string.Empty; - - if (string.Equals(method, "GET", StringComparison.OrdinalIgnoreCase)) - { - var audioBitrate = state.OutputAudioBitrate ?? 0; - var videoBitrate = state.OutputVideoBitrate ?? 0; - - playlistText = GetMasterPlaylistFileText(state, videoBitrate + audioBitrate); - } - - return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.m3u8"), new Dictionary<string, string>()); - } - - private string GetMasterPlaylistFileText(StreamState state, int totalBitrate) - { - var builder = new StringBuilder(); - - builder.AppendLine("#EXTM3U"); - - var isLiveStream = state.IsSegmentedLiveStream; - - var queryStringIndex = Request.RawUrl.IndexOf('?'); - var queryString = queryStringIndex == -1 ? string.Empty : Request.RawUrl.Substring(queryStringIndex); - - // from universal audio service - if (queryString.IndexOf("SegmentContainer", StringComparison.OrdinalIgnoreCase) == -1 && !string.IsNullOrWhiteSpace(state.Request.SegmentContainer)) - { - queryString += "&SegmentContainer=" + state.Request.SegmentContainer; - } - // from universal audio service - if (!string.IsNullOrWhiteSpace(state.Request.TranscodeReasons) && queryString.IndexOf("TranscodeReasons=", StringComparison.OrdinalIgnoreCase) == -1) - { - queryString += "&TranscodeReasons=" + state.Request.TranscodeReasons; - } - - // Main stream - var playlistUrl = isLiveStream ? "live.m3u8" : "main.m3u8"; - - playlistUrl += queryString; - - var request = state.Request; - - var subtitleStreams = state.MediaSource - .MediaStreams - .Where(i => i.IsTextSubtitleStream) - .ToList(); - - var subtitleGroup = subtitleStreams.Count > 0 && - request is GetMasterHlsVideoPlaylist && - (state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Hls || state.VideoRequest.EnableSubtitlesInManifest) ? - "subs" : - null; - - // If we're burning in subtitles then don't add additional subs to the manifest - if (state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode) - { - subtitleGroup = null; - } - - if (!string.IsNullOrWhiteSpace(subtitleGroup)) - { - AddSubtitles(state, subtitleStreams, builder); - } - - AppendPlaylist(builder, state, playlistUrl, totalBitrate, subtitleGroup); - - if (EnableAdaptiveBitrateStreaming(state, isLiveStream)) - { - var requestedVideoBitrate = state.VideoRequest == null ? 0 : state.VideoRequest.VideoBitRate ?? 0; - - // By default, vary by just 200k - var variation = GetBitrateVariation(totalBitrate); - - var newBitrate = totalBitrate - variation; - var variantUrl = ReplaceBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation); - AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup); - - variation *= 2; - newBitrate = totalBitrate - variation; - variantUrl = ReplaceBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation); - AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup); - } - - return builder.ToString(); - } - - private string ReplaceBitrate(string url, int oldValue, int newValue) - { - return url.Replace( - "videobitrate=" + oldValue.ToString(CultureInfo.InvariantCulture), - "videobitrate=" + newValue.ToString(CultureInfo.InvariantCulture), - StringComparison.OrdinalIgnoreCase); - } - - private void AddSubtitles(StreamState state, IEnumerable<MediaStream> subtitles, StringBuilder builder) - { - var selectedIndex = state.SubtitleStream == null || state.SubtitleDeliveryMethod != SubtitleDeliveryMethod.Hls ? (int?)null : state.SubtitleStream.Index; - - foreach (var stream in subtitles) - { - const string format = "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"{0}\",DEFAULT={1},FORCED={2},AUTOSELECT=YES,URI=\"{3}\",LANGUAGE=\"{4}\""; - - var name = stream.DisplayTitle; - - var isDefault = selectedIndex.HasValue && selectedIndex.Value == stream.Index; - var isForced = stream.IsForced; - - var url = string.Format("{0}/Subtitles/{1}/subtitles.m3u8?SegmentLength={2}&api_key={3}", - state.Request.MediaSourceId, - stream.Index.ToString(CultureInfo.InvariantCulture), - 30.ToString(CultureInfo.InvariantCulture), - AuthorizationContext.GetAuthorizationInfo(Request).Token); - - var line = string.Format(format, - name, - isDefault ? "YES" : "NO", - isForced ? "YES" : "NO", - url, - stream.Language ?? "Unknown"); - - builder.AppendLine(line); - } - } - - private bool EnableAdaptiveBitrateStreaming(StreamState state, bool isLiveStream) - { - // Within the local network this will likely do more harm than good. - if (Request.IsLocal || NetworkManager.IsInLocalNetwork(Request.RemoteIp)) - { - return false; - } - - if (state.Request is IMasterHlsRequest request && !request.EnableAdaptiveBitrateStreaming) - { - return false; - } - - if (isLiveStream || string.IsNullOrWhiteSpace(state.MediaPath)) - { - // Opening live streams is so slow it's not even worth it - return false; - } - - if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec)) - { - return false; - } - - if (EncodingHelper.IsCopyCodec(state.OutputAudioCodec)) - { - return false; - } - - if (!state.IsOutputVideo) - { - return false; - } - - // Having problems in android - return false; - // return state.VideoRequest.VideoBitRate.HasValue; - } - - /// <summary> - /// Get the H.26X level of the output video stream. - /// </summary> - /// <param name="state">StreamState of the current stream.</param> - /// <returns>H.26X level of the output video stream.</returns> - private int? GetOutputVideoCodecLevel(StreamState state) - { - string levelString; - if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec) - && state.VideoStream.Level.HasValue) - { - levelString = state.VideoStream?.Level.ToString(); - } - else - { - levelString = state.GetRequestedLevel(state.ActualOutputVideoCodec); - } - - if (int.TryParse(levelString, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsedLevel)) - { - return parsedLevel; - } - - return null; - } - - /// <summary> - /// Gets a formatted string of the output audio codec, for use in the CODECS field. - /// </summary> - /// <seealso cref="AppendPlaylistCodecsField(StringBuilder, StreamState)"/> - /// <seealso cref="GetPlaylistVideoCodecs(StreamState, string, int)"/> - /// <param name="state">StreamState of the current stream.</param> - /// <returns>Formatted audio codec string.</returns> - private string GetPlaylistAudioCodecs(StreamState state) - { - - if (string.Equals(state.ActualOutputAudioCodec, "aac", StringComparison.OrdinalIgnoreCase)) - { - string profile = state.GetRequestedProfiles("aac").FirstOrDefault(); - - return HlsCodecStringFactory.GetAACString(profile); - } - else if (string.Equals(state.ActualOutputAudioCodec, "mp3", StringComparison.OrdinalIgnoreCase)) - { - return HlsCodecStringFactory.GetMP3String(); - } - else if (string.Equals(state.ActualOutputAudioCodec, "ac3", StringComparison.OrdinalIgnoreCase)) - { - return HlsCodecStringFactory.GetAC3String(); - } - else if (string.Equals(state.ActualOutputAudioCodec, "eac3", StringComparison.OrdinalIgnoreCase)) - { - return HlsCodecStringFactory.GetEAC3String(); - } - - return string.Empty; - } - - /// <summary> - /// Gets a formatted string of the output video codec, for use in the CODECS field. - /// </summary> - /// <seealso cref="AppendPlaylistCodecsField(StringBuilder, StreamState)"/> - /// <seealso cref="GetPlaylistAudioCodecs(StreamState)"/> - /// <param name="state">StreamState of the current stream.</param> - /// <returns>Formatted video codec string.</returns> - private string GetPlaylistVideoCodecs(StreamState state, string codec, int level) - { - if (level == 0) - { - // This is 0 when there's no requested H.26X level in the device profile - // and the source is not encoded in H.26X - Logger.LogError("Got invalid H.26X level when building CODECS field for HLS master playlist"); - return string.Empty; - } - - if (string.Equals(codec, "h264", StringComparison.OrdinalIgnoreCase)) - { - string profile = state.GetRequestedProfiles("h264").FirstOrDefault(); - - return HlsCodecStringFactory.GetH264String(profile, level); - } - else if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) - || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase)) - { - string profile = state.GetRequestedProfiles("h265").FirstOrDefault(); - - return HlsCodecStringFactory.GetH265String(profile, level); - } - - return string.Empty; - } - - /// <summary> - /// Appends a CODECS field containing formatted strings of - /// the active streams output video and audio codecs. - /// </summary> - /// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/> - /// <seealso cref="GetPlaylistVideoCodecs(StreamState, string, int)"/> - /// <seealso cref="GetPlaylistAudioCodecs(StreamState)"/> - /// <param name="builder">StringBuilder to append the field to.</param> - /// <param name="state">StreamState of the current stream.</param> - private void AppendPlaylistCodecsField(StringBuilder builder, StreamState state) - { - // Video - string videoCodecs = string.Empty; - int? videoCodecLevel = GetOutputVideoCodecLevel(state); - if (!string.IsNullOrEmpty(state.ActualOutputVideoCodec) && videoCodecLevel.HasValue) - { - videoCodecs = GetPlaylistVideoCodecs(state, state.ActualOutputVideoCodec, videoCodecLevel.Value); - } - - // Audio - string audioCodecs = string.Empty; - if (!string.IsNullOrEmpty(state.ActualOutputAudioCodec)) - { - audioCodecs = GetPlaylistAudioCodecs(state); - } - - StringBuilder codecs = new StringBuilder(); - - codecs.Append(videoCodecs) - .Append(',') - .Append(audioCodecs); - - if (codecs.Length > 1) - { - builder.Append(",CODECS=\"") - .Append(codecs) - .Append('"'); - } - } - - /// <summary> - /// Appends a FRAME-RATE field containing the framerate of the output stream. - /// </summary> - /// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/> - /// <param name="builder">StringBuilder to append the field to.</param> - /// <param name="state">StreamState of the current stream.</param> - private void AppendPlaylistFramerateField(StringBuilder builder, StreamState state) - { - double? framerate = null; - if (state.TargetFramerate.HasValue) - { - framerate = Math.Round(state.TargetFramerate.GetValueOrDefault(), 3); - } - else if (state.VideoStream?.RealFrameRate != null) - { - framerate = Math.Round(state.VideoStream.RealFrameRate.GetValueOrDefault(), 3); - } - - if (framerate.HasValue) - { - builder.Append(",FRAME-RATE=") - .Append(framerate.Value); - } - } - - /// <summary> - /// Appends a RESOLUTION field containing the resolution of the output stream. - /// </summary> - /// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/> - /// <param name="builder">StringBuilder to append the field to.</param> - /// <param name="state">StreamState of the current stream.</param> - private void AppendPlaylistResolutionField(StringBuilder builder, StreamState state) - { - if (state.OutputWidth.HasValue && state.OutputHeight.HasValue) - { - builder.Append(",RESOLUTION=") - .Append(state.OutputWidth.GetValueOrDefault()) - .Append('x') - .Append(state.OutputHeight.GetValueOrDefault()); - } - } - - private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup) - { - builder.Append("#EXT-X-STREAM-INF:BANDWIDTH=") - .Append(bitrate.ToString(CultureInfo.InvariantCulture)) - .Append(",AVERAGE-BANDWIDTH=") - .Append(bitrate.ToString(CultureInfo.InvariantCulture)); - - AppendPlaylistCodecsField(builder, state); - - AppendPlaylistResolutionField(builder, state); - - AppendPlaylistFramerateField(builder, state); - - if (!string.IsNullOrWhiteSpace(subtitleGroup)) - { - builder.Append(",SUBTITLES=\"") - .Append(subtitleGroup) - .Append('"'); - } - - builder.Append(Environment.NewLine); - builder.AppendLine(url); - } - - private int GetBitrateVariation(int bitrate) - { - // By default, vary by just 50k - var variation = 50000; - - if (bitrate >= 10000000) - { - variation = 2000000; - } - else if (bitrate >= 5000000) - { - variation = 1500000; - } - else if (bitrate >= 3000000) - { - variation = 1000000; - } - else if (bitrate >= 2000000) - { - variation = 500000; - } - else if (bitrate >= 1000000) - { - variation = 300000; - } - else if (bitrate >= 600000) - { - variation = 200000; - } - else if (bitrate >= 400000) - { - variation = 100000; - } - - return variation; - } - - private async Task<object> GetVariantPlaylistInternal(StreamRequest request, bool isOutputVideo, string name) - { - var state = await GetState(request, CancellationToken.None).ConfigureAwait(false); - - var segmentLengths = GetSegmentLengths(state); - - var builder = new StringBuilder(); - - builder.AppendLine("#EXTM3U"); - builder.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD"); - builder.AppendLine("#EXT-X-VERSION:3"); - builder.AppendLine("#EXT-X-TARGETDURATION:" + Math.Ceiling(segmentLengths.Length > 0 ? segmentLengths.Max() : state.SegmentLength).ToString(CultureInfo.InvariantCulture)); - builder.AppendLine("#EXT-X-MEDIA-SEQUENCE:0"); - - var queryStringIndex = Request.RawUrl.IndexOf('?'); - var queryString = queryStringIndex == -1 ? string.Empty : Request.RawUrl.Substring(queryStringIndex); - - // if ((Request.UserAgent ?? string.Empty).IndexOf("roku", StringComparison.OrdinalIgnoreCase) != -1) - //{ - // queryString = string.Empty; - //} - - var index = 0; - - foreach (var length in segmentLengths) - { - builder.AppendLine("#EXTINF:" + length.ToString("0.0000", CultureInfo.InvariantCulture) + ", nodesc"); - - builder.AppendLine(string.Format("hls1/{0}/{1}{2}{3}", - - name, - index.ToString(CultureInfo.InvariantCulture), - GetSegmentFileExtension(request), - queryString)); - - index++; - } - - builder.AppendLine("#EXT-X-ENDLIST"); - - var playlistText = builder.ToString(); - - return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.m3u8"), new Dictionary<string, string>()); - } - - protected override string GetAudioArguments(StreamState state, EncodingOptions encodingOptions) - { - var audioCodec = EncodingHelper.GetAudioEncoder(state); - - if (!state.IsOutputVideo) - { - if (EncodingHelper.IsCopyCodec(audioCodec)) - { - return "-acodec copy"; - } - - var audioTranscodeParams = new List<string>(); - - audioTranscodeParams.Add("-acodec " + audioCodec); - - if (state.OutputAudioBitrate.HasValue) - { - audioTranscodeParams.Add("-ab " + state.OutputAudioBitrate.Value.ToString(CultureInfo.InvariantCulture)); - } - - if (state.OutputAudioChannels.HasValue) - { - audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(CultureInfo.InvariantCulture)); - } - - if (state.OutputAudioSampleRate.HasValue) - { - audioTranscodeParams.Add("-ar " + state.OutputAudioSampleRate.Value.ToString(CultureInfo.InvariantCulture)); - } - - audioTranscodeParams.Add("-vn"); - return string.Join(" ", audioTranscodeParams.ToArray()); - } - - if (EncodingHelper.IsCopyCodec(audioCodec)) - { - var videoCodec = EncodingHelper.GetVideoEncoder(state, encodingOptions); - - if (EncodingHelper.IsCopyCodec(videoCodec) && state.EnableBreakOnNonKeyFrames(videoCodec)) - { - return "-codec:a:0 copy -copypriorss:a:0 0"; - } - - return "-codec:a:0 copy"; - } - - var args = "-codec:a:0 " + audioCodec; - - var channels = state.OutputAudioChannels; - - if (channels.HasValue) - { - args += " -ac " + channels.Value; - } - - var bitrate = state.OutputAudioBitrate; - - if (bitrate.HasValue) - { - args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture); - } - - if (state.OutputAudioSampleRate.HasValue) - { - args += " -ar " + state.OutputAudioSampleRate.Value.ToString(CultureInfo.InvariantCulture); - } - - args += " " + EncodingHelper.GetAudioFilterParam(state, encodingOptions, true); - - return args; - } - - protected override string GetVideoArguments(StreamState state, EncodingOptions encodingOptions) - { - if (!state.IsOutputVideo) - { - return string.Empty; - } - - var codec = EncodingHelper.GetVideoEncoder(state, encodingOptions); - - 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 (EncodingHelper.IsCopyCodec(codec)) - { - if (state.VideoStream != null && !string.Equals(state.VideoStream.NalLengthSize, "0", StringComparison.OrdinalIgnoreCase)) - { - string bitStreamArgs = EncodingHelper.GetBitStreamArgs(state.VideoStream); - if (!string.IsNullOrEmpty(bitStreamArgs)) - { - args += " " + bitStreamArgs; - } - } - - // args += " -flags -global_header"; - } - else - { - var gopArg = string.Empty; - var keyFrameArg = string.Format( - CultureInfo.InvariantCulture, - " -force_key_frames:0 \"expr:gte(t,{0}+n_forced*{1})\"", - GetStartNumber(state) * state.SegmentLength, - state.SegmentLength); - - var framerate = state.VideoStream?.RealFrameRate; - - if (framerate.HasValue) - { - // This is to make sure keyframe interval is limited to our segment, - // as forcing keyframes is not enough. - // Example: we encoded half of desired length, then codec detected - // scene cut and inserted a keyframe; next forced keyframe would - // be created outside of segment, which breaks seeking - // -sc_threshold 0 is used to prevent the hardware encoder from post processing to break the set keyframe - gopArg = string.Format( - CultureInfo.InvariantCulture, - " -g {0} -keyint_min {0} -sc_threshold 0", - Math.Ceiling(state.SegmentLength * framerate.Value) - ); - } - - args += " " + EncodingHelper.GetVideoQualityParam(state, codec, encodingOptions, GetDefaultEncoderPreset()); - - // Unable to force key frames using these hw encoders, set key frames by GOP - if (string.Equals(codec, "h264_qsv", StringComparison.OrdinalIgnoreCase) - || string.Equals(codec, "h264_nvenc", StringComparison.OrdinalIgnoreCase) - || string.Equals(codec, "h264_amf", StringComparison.OrdinalIgnoreCase)) - { - args += " " + gopArg; - } - else - { - args += " " + keyFrameArg + gopArg; - } - - // args += " -mixed-refs 0 -refs 3 -x264opts b_pyramid=0:weightb=0:weightp=0"; - - var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode; - - // This is for graphical subs - if (hasGraphicalSubs) - { - args += EncodingHelper.GetGraphicalSubtitleParam(state, encodingOptions, codec); - } - // Add resolution params, if specified - else - { - args += EncodingHelper.GetOutputSizeParam(state, encodingOptions, codec); - } - - // -start_at_zero is necessary to use with -ss when seeking, - // otherwise the target position cannot be determined. - if (!(state.SubtitleStream != null && state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream)) - { - args += " -start_at_zero"; - } - - // args += " -flags -global_header"; - } - - if (!string.IsNullOrEmpty(state.OutputVideoSync)) - { - args += " -vsync " + state.OutputVideoSync; - } - - args += EncodingHelper.GetOutputFFlags(state); - - return args; - } - - protected override string GetCommandLineArguments(string outputPath, EncodingOptions encodingOptions, StreamState state, bool isEncoding) - { - var videoCodec = EncodingHelper.GetVideoEncoder(state, encodingOptions); - - var threads = EncodingHelper.GetNumberOfThreads(state, encodingOptions, videoCodec); - - if (state.BaseRequest.BreakOnNonKeyFrames) - { - // FIXME: this is actually a workaround, as ideally it really should be the client which decides whether non-keyframe - // breakpoints are supported; but current implementation always uses "ffmpeg input seeking" which is liable - // to produce a missing part of video stream before first keyframe is encountered, which may lead to - // awkward cases like a few starting HLS segments having no video whatsoever, which breaks hls.js - Logger.LogInformation("Current HLS implementation doesn't support non-keyframe breaks but one is requested, ignoring that request"); - state.BaseRequest.BreakOnNonKeyFrames = false; - } - - var inputModifier = EncodingHelper.GetInputModifier(state, encodingOptions); - - // If isEncoding is true we're actually starting ffmpeg - var startNumber = GetStartNumber(state); - var startNumberParam = isEncoding ? startNumber.ToString(CultureInfo.InvariantCulture) : "0"; - - var mapArgs = state.IsOutputVideo ? EncodingHelper.GetMapArgs(state) : string.Empty; - - var outputTsArg = Path.Combine(Path.GetDirectoryName(outputPath), Path.GetFileNameWithoutExtension(outputPath)) + "%d" + GetSegmentFileExtension(state.Request); - - var segmentFormat = GetSegmentFileExtension(state.Request).TrimStart('.'); - if (string.Equals(segmentFormat, "ts", StringComparison.OrdinalIgnoreCase)) - { - segmentFormat = "mpegts"; - } - - return string.Format( - "{0} {1} -map_metadata -1 -map_chapters -1 -threads {2} {3} {4} {5} -copyts -avoid_negative_ts disabled -f hls -max_delay 5000000 -hls_time {6} -individual_header_trailer 0 -hls_segment_type {7} -start_number {8} -hls_segment_filename \"{9}\" -hls_playlist_type vod -hls_list_size 0 -y \"{10}\"", - inputModifier, - EncodingHelper.GetInputArgument(state, encodingOptions), - threads, - mapArgs, - GetVideoArguments(state, encodingOptions), - GetAudioArguments(state, encodingOptions), - state.SegmentLength.ToString(CultureInfo.InvariantCulture), - segmentFormat, - startNumberParam, - outputTsArg, - outputPath - ).Trim(); - } - } -} |