mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-11-15 18:08:53 -07:00
711 lines
31 KiB
C#
711 lines
31 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Net;
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using System.Security.Claims;
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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 Jellyfin.Api.Models.StreamingDtos;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Net;
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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.MediaEncoding;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Model.Dlna;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Net;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using Microsoft.Net.Http.Headers;
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namespace Jellyfin.Api.Helpers
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{
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/// <summary>
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/// Dynamic hls helper.
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/// </summary>
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public class DynamicHlsHelper
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{
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private readonly ILibraryManager _libraryManager;
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private readonly IUserManager _userManager;
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private readonly IDlnaManager _dlnaManager;
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private readonly IAuthorizationContext _authContext;
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private readonly IMediaSourceManager _mediaSourceManager;
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private readonly IServerConfigurationManager _serverConfigurationManager;
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private readonly IMediaEncoder _mediaEncoder;
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private readonly IFileSystem _fileSystem;
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private readonly ISubtitleEncoder _subtitleEncoder;
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private readonly IConfiguration _configuration;
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private readonly IDeviceManager _deviceManager;
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private readonly TranscodingJobHelper _transcodingJobHelper;
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private readonly INetworkManager _networkManager;
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private readonly ILogger<DynamicHlsHelper> _logger;
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private readonly IHttpContextAccessor _httpContextAccessor;
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/// <summary>
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/// Initializes a new instance of the <see cref="DynamicHlsHelper"/> class.
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/// </summary>
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/// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
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/// <param name="userManager">Instance of the <see cref="IUserManager"/> interface.</param>
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/// <param name="dlnaManager">Instance of the <see cref="IDlnaManager"/> interface.</param>
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/// <param name="authContext">Instance of the <see cref="IAuthorizationContext"/> interface.</param>
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/// <param name="mediaSourceManager">Instance of the <see cref="IMediaSourceManager"/> interface.</param>
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/// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
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/// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
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/// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
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/// <param name="subtitleEncoder">Instance of the <see cref="ISubtitleEncoder"/> interface.</param>
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/// <param name="configuration">Instance of the <see cref="IConfiguration"/> interface.</param>
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/// <param name="deviceManager">Instance of the <see cref="IDeviceManager"/> interface.</param>
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/// <param name="transcodingJobHelper">Instance of <see cref="TranscodingJobHelper"/>.</param>
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/// <param name="networkManager">Instance of the <see cref="INetworkManager"/> interface.</param>
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/// <param name="logger">Instance of the <see cref="ILogger{DynamicHlsHelper}"/> interface.</param>
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/// <param name="httpContextAccessor">Instance of the <see cref="IHttpContextAccessor"/> interface.</param>
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public DynamicHlsHelper(
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ILibraryManager libraryManager,
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IUserManager userManager,
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IDlnaManager dlnaManager,
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IAuthorizationContext authContext,
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IMediaSourceManager mediaSourceManager,
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IServerConfigurationManager serverConfigurationManager,
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IMediaEncoder mediaEncoder,
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IFileSystem fileSystem,
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ISubtitleEncoder subtitleEncoder,
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IConfiguration configuration,
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IDeviceManager deviceManager,
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TranscodingJobHelper transcodingJobHelper,
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INetworkManager networkManager,
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ILogger<DynamicHlsHelper> logger,
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IHttpContextAccessor httpContextAccessor)
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{
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_libraryManager = libraryManager;
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_userManager = userManager;
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_dlnaManager = dlnaManager;
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_authContext = authContext;
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_mediaSourceManager = mediaSourceManager;
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_serverConfigurationManager = serverConfigurationManager;
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_mediaEncoder = mediaEncoder;
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_fileSystem = fileSystem;
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_subtitleEncoder = subtitleEncoder;
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_configuration = configuration;
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_deviceManager = deviceManager;
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_transcodingJobHelper = transcodingJobHelper;
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_networkManager = networkManager;
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_logger = logger;
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_httpContextAccessor = httpContextAccessor;
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}
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/// <summary>
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/// Get master hls playlist.
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/// </summary>
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/// <param name="transcodingJobType">Transcoding job type.</param>
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/// <param name="streamingRequest">Streaming request dto.</param>
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/// <param name="enableAdaptiveBitrateStreaming">Enable adaptive bitrate streaming.</param>
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/// <returns>A <see cref="Task"/> containing the resulting <see cref="ActionResult"/>.</returns>
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public async Task<ActionResult> GetMasterHlsPlaylist(
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TranscodingJobType transcodingJobType,
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StreamingRequestDto streamingRequest,
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bool enableAdaptiveBitrateStreaming)
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{
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var isHeadRequest = _httpContextAccessor.HttpContext.Request.Method == WebRequestMethods.Http.Head;
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var cancellationTokenSource = new CancellationTokenSource();
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return await GetMasterPlaylistInternal(
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streamingRequest,
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isHeadRequest,
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enableAdaptiveBitrateStreaming,
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transcodingJobType,
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cancellationTokenSource).ConfigureAwait(false);
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}
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private async Task<ActionResult> GetMasterPlaylistInternal(
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StreamingRequestDto streamingRequest,
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bool isHeadRequest,
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bool enableAdaptiveBitrateStreaming,
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TranscodingJobType transcodingJobType,
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CancellationTokenSource cancellationTokenSource)
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{
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using var state = await StreamingHelpers.GetStreamingState(
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streamingRequest,
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_httpContextAccessor.HttpContext.Request,
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_authContext,
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_mediaSourceManager,
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_userManager,
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_libraryManager,
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_serverConfigurationManager,
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_mediaEncoder,
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_fileSystem,
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_subtitleEncoder,
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_configuration,
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_dlnaManager,
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_deviceManager,
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_transcodingJobHelper,
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transcodingJobType,
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cancellationTokenSource.Token)
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.ConfigureAwait(false);
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_httpContextAccessor.HttpContext.Response.Headers.Add(HeaderNames.Expires, "0");
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if (isHeadRequest)
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{
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return new FileContentResult(Array.Empty<byte>(), MimeTypes.GetMimeType("playlist.m3u8"));
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}
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var totalBitrate = (state.OutputAudioBitrate ?? 0) + (state.OutputVideoBitrate ?? 0);
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var builder = new StringBuilder();
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builder.AppendLine("#EXTM3U");
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var isLiveStream = state.IsSegmentedLiveStream;
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var queryString = _httpContextAccessor.HttpContext.Request.QueryString.ToString();
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// from universal audio service
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if (queryString.IndexOf("SegmentContainer", StringComparison.OrdinalIgnoreCase) == -1 && !string.IsNullOrWhiteSpace(state.Request.SegmentContainer))
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{
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queryString += "&SegmentContainer=" + state.Request.SegmentContainer;
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}
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// from universal audio service
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if (!string.IsNullOrWhiteSpace(state.Request.TranscodeReasons) && queryString.IndexOf("TranscodeReasons=", StringComparison.OrdinalIgnoreCase) == -1)
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{
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queryString += "&TranscodeReasons=" + state.Request.TranscodeReasons;
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}
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// Main stream
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var playlistUrl = isLiveStream ? "live.m3u8" : "main.m3u8";
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playlistUrl += queryString;
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var subtitleStreams = state.MediaSource
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.MediaStreams
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.Where(i => i.IsTextSubtitleStream)
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.ToList();
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var subtitleGroup = subtitleStreams.Count > 0 && (state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Hls || state.VideoRequest!.EnableSubtitlesInManifest)
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? "subs"
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: null;
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// If we're burning in subtitles then don't add additional subs to the manifest
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if (state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode)
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{
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subtitleGroup = null;
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}
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if (!string.IsNullOrWhiteSpace(subtitleGroup))
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{
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AddSubtitles(state, subtitleStreams, builder, _httpContextAccessor.HttpContext.User);
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}
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var basicPlaylist = AppendPlaylist(builder, state, playlistUrl, totalBitrate, subtitleGroup);
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if (state.VideoStream != null && state.VideoRequest != null)
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{
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// Provide SDR HEVC entrance for backward compatibility
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if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec)
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&& !string.IsNullOrEmpty(state.VideoStream.VideoRange)
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&& string.Equals(state.VideoStream.VideoRange, "HDR", StringComparison.OrdinalIgnoreCase)
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&& string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase))
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{
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var requestedVideoProfiles = state.GetRequestedProfiles("hevc");
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if (requestedVideoProfiles != null && requestedVideoProfiles.Length > 0)
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{
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// Force HEVC Main Profile and disable video stream copy
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state.OutputVideoCodec = "hevc";
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var sdrVideoUrl = ReplaceProfile(playlistUrl, "hevc", string.Join(",", requestedVideoProfiles), "main");
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sdrVideoUrl += "&AllowVideoStreamCopy=false";
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EncodingHelper encodingHelper = new EncodingHelper(_mediaEncoder, _fileSystem, _subtitleEncoder, _configuration);
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var sdrOutputVideoBitrate = encodingHelper.GetVideoBitrateParamValue(state.VideoRequest, state.VideoStream, state.OutputVideoCodec) ?? 0;
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var sdrOutputAudioBitrate = encodingHelper.GetAudioBitrateParam(state.VideoRequest.AudioBitRate, state.AudioStream) ?? 0;
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var sdrTotalBitrate = sdrOutputAudioBitrate + sdrOutputVideoBitrate;
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AppendPlaylist(builder, state, sdrVideoUrl, sdrTotalBitrate, subtitleGroup);
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// Restore the video codec
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state.OutputVideoCodec = "copy";
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}
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}
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// Provide Level 5.0 entrance for backward compatibility
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// e.g. Apple A10 chips refuse the master playlist containing SDR HEVC Main Level 5.1 video,
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// but in fact it is capable of playing videos up to Level 6.1.
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if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec)
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&& state.VideoStream.Level.HasValue
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&& state.VideoStream.Level > 150
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&& !string.IsNullOrEmpty(state.VideoStream.VideoRange)
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&& string.Equals(state.VideoStream.VideoRange, "SDR", StringComparison.OrdinalIgnoreCase)
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&& string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase))
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{
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var playlistCodecsField = new StringBuilder();
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AppendPlaylistCodecsField(playlistCodecsField, state);
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// Force the video level to 5.0
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var originalLevel = state.VideoStream.Level;
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state.VideoStream.Level = 150;
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var newPlaylistCodecsField = new StringBuilder();
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AppendPlaylistCodecsField(newPlaylistCodecsField, state);
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// Restore the video level
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state.VideoStream.Level = originalLevel;
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var newPlaylist = ReplacePlaylistCodecsField(basicPlaylist, playlistCodecsField, newPlaylistCodecsField);
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builder.Append(newPlaylist);
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}
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}
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if (EnableAdaptiveBitrateStreaming(state, isLiveStream, enableAdaptiveBitrateStreaming, _httpContextAccessor.HttpContext.GetNormalizedRemoteIp()))
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{
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var requestedVideoBitrate = state.VideoRequest == null ? 0 : state.VideoRequest.VideoBitRate ?? 0;
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// By default, vary by just 200k
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var variation = GetBitrateVariation(totalBitrate);
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var newBitrate = totalBitrate - variation;
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var variantUrl = ReplaceVideoBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation);
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AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup);
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variation *= 2;
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newBitrate = totalBitrate - variation;
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variantUrl = ReplaceVideoBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation);
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AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup);
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}
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return new FileContentResult(Encoding.UTF8.GetBytes(builder.ToString()), MimeTypes.GetMimeType("playlist.m3u8"));
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}
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private StringBuilder AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string? subtitleGroup)
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{
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var playlistBuilder = new StringBuilder();
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playlistBuilder.Append("#EXT-X-STREAM-INF:BANDWIDTH=")
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.Append(bitrate.ToString(CultureInfo.InvariantCulture))
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.Append(",AVERAGE-BANDWIDTH=")
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.Append(bitrate.ToString(CultureInfo.InvariantCulture));
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AppendPlaylistVideoRangeField(playlistBuilder, state);
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AppendPlaylistCodecsField(playlistBuilder, state);
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AppendPlaylistResolutionField(playlistBuilder, state);
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AppendPlaylistFramerateField(playlistBuilder, state);
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if (!string.IsNullOrWhiteSpace(subtitleGroup))
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{
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playlistBuilder.Append(",SUBTITLES=\"")
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.Append(subtitleGroup)
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.Append('"');
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}
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playlistBuilder.Append(Environment.NewLine);
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playlistBuilder.AppendLine(url);
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builder.Append(playlistBuilder);
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return playlistBuilder;
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}
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/// <summary>
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/// Appends a VIDEO-RANGE field containing the range of the output video stream.
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/// </summary>
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/// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/>
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/// <param name="builder">StringBuilder to append the field to.</param>
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/// <param name="state">StreamState of the current stream.</param>
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private void AppendPlaylistVideoRangeField(StringBuilder builder, StreamState state)
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{
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if (state.VideoStream != null && !string.IsNullOrEmpty(state.VideoStream.VideoRange))
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{
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var videoRange = state.VideoStream.VideoRange;
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if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec))
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{
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if (string.Equals(videoRange, "SDR", StringComparison.OrdinalIgnoreCase))
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{
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builder.Append(",VIDEO-RANGE=SDR");
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}
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if (string.Equals(videoRange, "HDR", StringComparison.OrdinalIgnoreCase))
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{
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builder.Append(",VIDEO-RANGE=PQ");
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}
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}
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else
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{
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// Currently we only encode to SDR
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builder.Append(",VIDEO-RANGE=SDR");
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}
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}
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}
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/// <summary>
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/// Appends a CODECS field containing formatted strings of
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/// the active streams output video and audio codecs.
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/// </summary>
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/// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/>
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/// <seealso cref="GetPlaylistVideoCodecs(StreamState, string, int)"/>
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/// <seealso cref="GetPlaylistAudioCodecs(StreamState)"/>
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/// <param name="builder">StringBuilder to append the field to.</param>
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/// <param name="state">StreamState of the current stream.</param>
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private void AppendPlaylistCodecsField(StringBuilder builder, StreamState state)
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{
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// Video
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string videoCodecs = string.Empty;
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int? videoCodecLevel = GetOutputVideoCodecLevel(state);
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if (!string.IsNullOrEmpty(state.ActualOutputVideoCodec) && videoCodecLevel.HasValue)
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{
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videoCodecs = GetPlaylistVideoCodecs(state, state.ActualOutputVideoCodec, videoCodecLevel.Value);
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}
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// Audio
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string audioCodecs = string.Empty;
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if (!string.IsNullOrEmpty(state.ActualOutputAudioCodec))
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{
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audioCodecs = GetPlaylistAudioCodecs(state);
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}
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StringBuilder codecs = new StringBuilder();
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codecs.Append(videoCodecs);
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if (!string.IsNullOrEmpty(videoCodecs) && !string.IsNullOrEmpty(audioCodecs))
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{
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codecs.Append(',');
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}
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codecs.Append(audioCodecs);
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if (codecs.Length > 1)
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{
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builder.Append(",CODECS=\"")
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.Append(codecs)
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.Append('"');
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}
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}
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/// <summary>
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/// Appends a RESOLUTION field containing the resolution of the output stream.
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/// </summary>
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/// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/>
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/// <param name="builder">StringBuilder to append the field to.</param>
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/// <param name="state">StreamState of the current stream.</param>
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private void AppendPlaylistResolutionField(StringBuilder builder, StreamState state)
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{
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if (state.OutputWidth.HasValue && state.OutputHeight.HasValue)
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{
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builder.Append(",RESOLUTION=")
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.Append(state.OutputWidth.GetValueOrDefault())
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.Append('x')
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.Append(state.OutputHeight.GetValueOrDefault());
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}
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}
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/// <summary>
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/// Appends a FRAME-RATE field containing the framerate of the output stream.
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/// </summary>
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/// <seealso cref="AppendPlaylist(StringBuilder, StreamState, string, int, string)"/>
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/// <param name="builder">StringBuilder to append the field to.</param>
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/// <param name="state">StreamState of the current stream.</param>
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private void AppendPlaylistFramerateField(StringBuilder builder, StreamState state)
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{
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double? framerate = null;
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if (state.TargetFramerate.HasValue)
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{
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framerate = Math.Round(state.TargetFramerate.GetValueOrDefault(), 3);
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}
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else if (state.VideoStream?.RealFrameRate != null)
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{
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framerate = Math.Round(state.VideoStream.RealFrameRate.GetValueOrDefault(), 3);
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}
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if (framerate.HasValue)
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{
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builder.Append(",FRAME-RATE=")
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.Append(framerate.Value);
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}
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}
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private bool EnableAdaptiveBitrateStreaming(StreamState state, bool isLiveStream, bool enableAdaptiveBitrateStreaming, string ipAddress)
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{
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// Within the local network this will likely do more harm than good.
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if (_networkManager.IsInLocalNetwork(ipAddress))
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{
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return false;
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}
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if (!enableAdaptiveBitrateStreaming)
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{
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return false;
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}
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if (isLiveStream || string.IsNullOrWhiteSpace(state.MediaPath))
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{
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// Opening live streams is so slow it's not even worth it
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return false;
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}
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if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec))
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{
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return false;
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}
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if (EncodingHelper.IsCopyCodec(state.OutputAudioCodec))
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{
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return false;
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}
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if (!state.IsOutputVideo)
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{
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return false;
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}
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// Having problems in android
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return false;
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// return state.VideoRequest.VideoBitRate.HasValue;
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}
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private void AddSubtitles(StreamState state, IEnumerable<MediaStream> subtitles, StringBuilder builder, ClaimsPrincipal user)
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{
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var selectedIndex = state.SubtitleStream == null || state.SubtitleDeliveryMethod != SubtitleDeliveryMethod.Hls ? (int?)null : state.SubtitleStream.Index;
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const string Format = "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"{0}\",DEFAULT={1},FORCED={2},AUTOSELECT=YES,URI=\"{3}\",LANGUAGE=\"{4}\"";
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foreach (var stream in subtitles)
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{
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var name = stream.DisplayTitle;
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var isDefault = selectedIndex.HasValue && selectedIndex.Value == stream.Index;
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var isForced = stream.IsForced;
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|
|
|
var url = string.Format(
|
|
CultureInfo.InvariantCulture,
|
|
"{0}/Subtitles/{1}/subtitles.m3u8?SegmentLength={2}&api_key={3}",
|
|
state.Request.MediaSourceId,
|
|
stream.Index.ToString(CultureInfo.InvariantCulture),
|
|
30.ToString(CultureInfo.InvariantCulture),
|
|
ClaimHelpers.GetToken(user));
|
|
|
|
var line = string.Format(
|
|
CultureInfo.InvariantCulture,
|
|
Format,
|
|
name,
|
|
isDefault ? "YES" : "NO",
|
|
isForced ? "YES" : "NO",
|
|
url,
|
|
stream.Language ?? "Unknown");
|
|
|
|
builder.AppendLine(line);
|
|
}
|
|
}
|
|
|
|
/// <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 = string.Empty;
|
|
if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec)
|
|
&& state.VideoStream != null
|
|
&& state.VideoStream.Level.HasValue)
|
|
{
|
|
levelString = state.VideoStream.Level.ToString();
|
|
}
|
|
else
|
|
{
|
|
if (string.Equals(state.ActualOutputVideoCodec, "h264", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
levelString = state.GetRequestedLevel(state.ActualOutputVideoCodec) ?? "41";
|
|
levelString = EncodingHelper.NormalizeTranscodingLevel(state, levelString);
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputVideoCodec, "h265", StringComparison.OrdinalIgnoreCase)
|
|
|| string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
levelString = state.GetRequestedLevel("h265") ?? state.GetRequestedLevel("hevc") ?? "120";
|
|
levelString = EncodingHelper.NormalizeTranscodingLevel(state, levelString);
|
|
}
|
|
}
|
|
|
|
if (int.TryParse(levelString, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsedLevel))
|
|
{
|
|
return parsedLevel;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Get the H.26X profile of the output video stream.
|
|
/// </summary>
|
|
/// <param name="state">StreamState of the current stream.</param>
|
|
/// <param name="codec">Video codec.</param>
|
|
/// <returns>H.26X profile of the output video stream.</returns>
|
|
private string GetOutputVideoCodecProfile(StreamState state, string codec)
|
|
{
|
|
string profileString = string.Empty;
|
|
if (EncodingHelper.IsCopyCodec(state.OutputVideoCodec)
|
|
&& !string.IsNullOrEmpty(state.VideoStream.Profile))
|
|
{
|
|
profileString = state.VideoStream.Profile;
|
|
}
|
|
else if (!string.IsNullOrEmpty(codec))
|
|
{
|
|
profileString = state.GetRequestedProfiles(codec).FirstOrDefault();
|
|
if (string.Equals(state.ActualOutputVideoCodec, "h264", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
profileString = profileString ?? "high";
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputVideoCodec, "h265", StringComparison.OrdinalIgnoreCase)
|
|
|| string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
profileString = profileString ?? "main";
|
|
}
|
|
}
|
|
|
|
return profileString;
|
|
}
|
|
|
|
/// <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 HlsCodecStringHelpers.GetAACString(profile);
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputAudioCodec, "mp3", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return HlsCodecStringHelpers.GetMP3String();
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputAudioCodec, "ac3", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return HlsCodecStringHelpers.GetAC3String();
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputAudioCodec, "eac3", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return HlsCodecStringHelpers.GetEAC3String();
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputAudioCodec, "flac", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return HlsCodecStringHelpers.GetFLACString();
|
|
}
|
|
|
|
if (string.Equals(state.ActualOutputAudioCodec, "alac", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return HlsCodecStringHelpers.GetALACString();
|
|
}
|
|
|
|
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>
|
|
/// <param name="codec">Video codec.</param>
|
|
/// <param name="level">Video level.</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 = GetOutputVideoCodecProfile(state, "h264");
|
|
return HlsCodecStringHelpers.GetH264String(profile, level);
|
|
}
|
|
|
|
if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase)
|
|
|| string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
string profile = GetOutputVideoCodecProfile(state, "hevc");
|
|
return HlsCodecStringHelpers.GetH265String(profile, level);
|
|
}
|
|
|
|
return string.Empty;
|
|
}
|
|
|
|
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 string ReplaceVideoBitrate(string url, int oldValue, int newValue)
|
|
{
|
|
return url.Replace(
|
|
"videobitrate=" + oldValue.ToString(CultureInfo.InvariantCulture),
|
|
"videobitrate=" + newValue.ToString(CultureInfo.InvariantCulture),
|
|
StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
private string ReplaceProfile(string url, string codec, string oldValue, string newValue)
|
|
{
|
|
return url.Replace(
|
|
codec + "-profile=" + oldValue.ToString(),
|
|
codec + "-profile=" + newValue.ToString(),
|
|
StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
private string ReplacePlaylistCodecsField(StringBuilder playlist, StringBuilder oldValue, StringBuilder newValue)
|
|
{
|
|
var oldPlaylist = playlist.ToString();
|
|
return oldPlaylist.Replace(
|
|
oldValue.ToString(),
|
|
newValue.ToString(),
|
|
StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
}
|
|
}
|