From 85da15685f7a761af3a34f1c591bf129aa5deb5f Mon Sep 17 00:00:00 2001 From: Andreas B <6439218+YouKnowBlom@users.noreply.github.com> Date: Sun, 15 Mar 2020 15:06:38 +0100 Subject: [PATCH 1/5] Refactor DynamicHlsService.AppendPlaylist to use StringBuilder --- MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs index 262f517869..8787eb2a3f 100644 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs @@ -724,7 +724,10 @@ namespace MediaBrowser.Api.Playback.Hls private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup) { - var header = "#EXT-X-STREAM-INF:BANDWIDTH=" + bitrate.ToString(CultureInfo.InvariantCulture) + ",AVERAGE-BANDWIDTH=" + bitrate.ToString(CultureInfo.InvariantCulture); + builder.Append("#EXT-X-STREAM-INF:BANDWIDTH=") + .Append(bitrate.ToString(CultureInfo.InvariantCulture)) + .Append(",AVERAGE-BANDWIDTH=") + .Append(bitrate.ToString(CultureInfo.InvariantCulture)); // tvos wants resolution, codecs, framerate //if (state.TargetFramerate.HasValue) @@ -734,10 +737,12 @@ namespace MediaBrowser.Api.Playback.Hls if (!string.IsNullOrWhiteSpace(subtitleGroup)) { - header += string.Format(",SUBTITLES=\"{0}\"", subtitleGroup); + builder.Append(",SUBTITLES=\"") + .Append(subtitleGroup) + .Append('"'); } - builder.AppendLine(header); + builder.Append(Environment.NewLine); builder.AppendLine(url); } From f2858878d166df214aee20f2dc0710b766285c91 Mon Sep 17 00:00:00 2001 From: Andreas B <6439218+YouKnowBlom@users.noreply.github.com> Date: Wed, 11 Mar 2020 18:14:36 +0100 Subject: [PATCH 2/5] Add CODECS field to HLS master playlist --- .../Playback/Hls/DynamicHlsService.cs | 110 +++++++++++++++ .../Playback/Hls/HlsCodecStringFactory.cs | 126 ++++++++++++++++++ 2 files changed, 236 insertions(+) create mode 100644 MediaBrowser.Api/Playback/Hls/HlsCodecStringFactory.cs diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs index 8787eb2a3f..e6c9213912 100644 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs @@ -722,6 +722,114 @@ namespace MediaBrowser.Api.Playback.Hls //return state.VideoRequest.VideoBitRate.HasValue; } + /// + /// Gets a formatted string of the output audio codec, for use in the CODECS field. + /// + /// + /// + /// StreamState of the current stream. + /// Formatted audio codec string. + 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; + } + + /// + /// Gets a formatted string of the output video codec, for use in the CODECS field. + /// + /// + /// + /// StreamState of the current stream. + /// Formatted video codec string. + private string GetPlaylistVideoCodecs(StreamState state) + { + int level = Convert.ToInt32(state.GetRequestedLevel(state.ActualOutputVideoCodec)); + + if (string.Equals(state.ActualOutputVideoCodec, "h264", StringComparison.OrdinalIgnoreCase)) + { + string profile = state.GetRequestedProfiles("h264").FirstOrDefault(); + + return HlsCodecStringFactory.GetH264String(profile, level); + } + else if (string.Equals(state.ActualOutputVideoCodec, "h265", StringComparison.OrdinalIgnoreCase) + || string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase)) + { + string profile = state.GetRequestedProfiles("h265").FirstOrDefault(); + + return HlsCodecStringFactory.GetH265String(profile, level); + } + + return string.Empty; + } + + /// + /// Appends a CODECS field containing formatted strings of + /// the active streams output video and audio codecs. + /// + /// + /// + /// + /// StringBuilder to append the field to. + /// StreamState of the current stream. + private void AppendPlaylistCodecsField(StringBuilder builder, StreamState state) + { + // Video + string videoCodecs = string.Empty; + if (!string.IsNullOrEmpty(state.ActualOutputVideoCodec)) + { + videoCodecs = GetPlaylistVideoCodecs(state); + } + + // Audio + string audioCodecs = string.Empty; + if (!string.IsNullOrEmpty(state.ActualOutputAudioCodec)) + { + audioCodecs = GetPlaylistAudioCodecs(state); + } + + if (!string.IsNullOrEmpty(videoCodecs) || !string.IsNullOrEmpty(audioCodecs)) + { + builder.Append(",CODECS=\""); + + if (!string.IsNullOrEmpty(videoCodecs) && !string.IsNullOrEmpty(audioCodecs)) + { + builder.Append(videoCodecs) + .Append(',') + .Append(audioCodecs); + } + else if (!string.IsNullOrEmpty(videoCodecs)) + { + builder.Append(videoCodecs); + } + else if (!string.IsNullOrEmpty(audioCodecs)) + { + builder.Append(audioCodecs); + } + + builder.Append('"'); + } + } + private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup) { builder.Append("#EXT-X-STREAM-INF:BANDWIDTH=") @@ -735,6 +843,8 @@ namespace MediaBrowser.Api.Playback.Hls // header += string.Format(",FRAME-RATE=\"{0}\"", state.TargetFramerate.Value.ToString(CultureInfo.InvariantCulture)); //} + AppendPlaylistCodecsField(builder, state); + if (!string.IsNullOrWhiteSpace(subtitleGroup)) { builder.Append(",SUBTITLES=\"") diff --git a/MediaBrowser.Api/Playback/Hls/HlsCodecStringFactory.cs b/MediaBrowser.Api/Playback/Hls/HlsCodecStringFactory.cs new file mode 100644 index 0000000000..3bbb77a65e --- /dev/null +++ b/MediaBrowser.Api/Playback/Hls/HlsCodecStringFactory.cs @@ -0,0 +1,126 @@ +using System; +using System.Text; + + +namespace MediaBrowser.Api.Playback +{ + /// + /// Get various codec strings for use in HLS playlists. + /// + static class HlsCodecStringFactory + { + + /// + /// Gets a MP3 codec string. + /// + /// MP3 codec string. + public static string GetMP3String() + { + return "mp4a.40.34"; + } + + /// + /// Gets an AAC codec string. + /// + /// AAC profile. + /// AAC codec string. + public static string GetAACString(string profile) + { + StringBuilder result = new StringBuilder("mp4a", 9); + + if (string.Equals(profile, "HE", StringComparison.OrdinalIgnoreCase)) + { + result.Append(".40.5"); + } + else + { + // Default to LC if profile is invalid + result.Append(".40.2"); + } + + return result.ToString(); + } + + /// + /// Gets a H.264 codec string. + /// + /// H.264 profile. + /// H.264 level. + /// H.264 string. + public static string GetH264String(string profile, int level) + { + StringBuilder result = new StringBuilder("avc1", 11); + + if (string.Equals(profile, "high", StringComparison.OrdinalIgnoreCase)) + { + result.Append(".6400"); + } + else if (string.Equals(profile, "main", StringComparison.OrdinalIgnoreCase)) + { + result.Append(".4D40"); + } + else if (string.Equals(profile, "baseline", StringComparison.OrdinalIgnoreCase)) + { + result.Append(".42E0"); + } + else + { + // Default to constrained baseline if profile is invalid + result.Append(".4240"); + } + + string levelHex = level.ToString("X2"); + result.Append(levelHex); + + return result.ToString(); + } + + /// + /// Gets a H.265 codec string. + /// + /// H.265 profile. + /// H.265 level. + /// H.265 string. + public static string GetH265String(string profile, int level) + { + // The h265 syntax is a bit of a mystery at the time this comment was written. + // This is what I've found through various sources: + // FORMAT: [codecTag].[profile].[constraint?].L[level * 30].[UNKNOWN] + StringBuilder result = new StringBuilder("hev1", 16); + + if (string.Equals(profile, "main10", StringComparison.OrdinalIgnoreCase)) + { + result.Append(".2.6"); + } + else + { + // Default to main if profile is invalid + result.Append(".1.6"); + } + + result.Append(".L") + .Append(level * 3) + .Append(".B0"); + + return result.ToString(); + } + + /// + /// Gets an AC-3 codec string. + /// + /// AC-3 codec string. + public static string GetAC3String() + { + return "mp4a.a5"; + } + + /// + /// Gets an E-AC-3 codec string. + /// + /// E-AC-3 codec string. + public static string GetEAC3String() + { + return "mp4a.a6"; + } + } +} From 8a990d1d95aa22840bae5c3494cb5371bcf2b4d8 Mon Sep 17 00:00:00 2001 From: Andreas B <6439218+YouKnowBlom@users.noreply.github.com> Date: Wed, 11 Mar 2020 18:16:57 +0100 Subject: [PATCH 3/5] Add FRAME-RATE field to HLS master playlist --- .../Playback/Hls/DynamicHlsService.cs | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs index e6c9213912..d56b5cbff4 100644 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs @@ -830,6 +830,32 @@ namespace MediaBrowser.Api.Playback.Hls } } + /// + /// Appends a FRAME-RATE field containing the framerate of the output stream. + /// + /// + /// StringBuilder to append the field to. + /// StreamState of the current stream. + 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.HasValue) + { + framerate = Math.Round(state.VideoStream.RealFrameRate.GetValueOrDefault(), 3); + } + + if (framerate.HasValue) + { + builder.Append(",FRAME-RATE=\"") + .Append(framerate.Value) + .Append('"'); + } + } + private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup) { builder.Append("#EXT-X-STREAM-INF:BANDWIDTH=") @@ -845,6 +871,8 @@ namespace MediaBrowser.Api.Playback.Hls AppendPlaylistCodecsField(builder, state); + AppendPlaylistFramerateField(builder, state); + if (!string.IsNullOrWhiteSpace(subtitleGroup)) { builder.Append(",SUBTITLES=\"") From 0a2d24aff3d2e78c97b4b2294a418e2cd4a16be1 Mon Sep 17 00:00:00 2001 From: Andreas B <6439218+YouKnowBlom@users.noreply.github.com> Date: Sun, 15 Mar 2020 18:13:19 +0100 Subject: [PATCH 4/5] Add RESOLUTION field to HLS master playlist --- .../Playback/Hls/DynamicHlsService.cs | 26 ++++++++++++++----- 1 file changed, 20 insertions(+), 6 deletions(-) diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs index d56b5cbff4..ce25676ff5 100644 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs @@ -856,6 +856,24 @@ namespace MediaBrowser.Api.Playback.Hls } } + /// + /// Appends a RESOLUTION field containing the resolution of the output stream. + /// + /// + /// StringBuilder to append the field to. + /// StreamState of the current stream. + 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()) + .Append('"'); + } + } + private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup) { builder.Append("#EXT-X-STREAM-INF:BANDWIDTH=") @@ -863,14 +881,10 @@ namespace MediaBrowser.Api.Playback.Hls .Append(",AVERAGE-BANDWIDTH=") .Append(bitrate.ToString(CultureInfo.InvariantCulture)); - // tvos wants resolution, codecs, framerate - //if (state.TargetFramerate.HasValue) - //{ - // header += string.Format(",FRAME-RATE=\"{0}\"", state.TargetFramerate.Value.ToString(CultureInfo.InvariantCulture)); - //} - AppendPlaylistCodecsField(builder, state); + AppendPlaylistResolutionField(builder, state); + AppendPlaylistFramerateField(builder, state); if (!string.IsNullOrWhiteSpace(subtitleGroup)) From 153ea9f027d038ae86f644348eac7b43778d751d Mon Sep 17 00:00:00 2001 From: Andreas B <6439218+YouKnowBlom@users.noreply.github.com> Date: Sat, 25 Apr 2020 15:22:09 +0200 Subject: [PATCH 5/5] Fix error in HLS codecs field when level is null --- .../Playback/Hls/DynamicHlsService.cs | 80 ++++++++++++------- 1 file changed, 52 insertions(+), 28 deletions(-) diff --git a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs index ce25676ff5..9071ef18fd 100644 --- a/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs +++ b/MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs @@ -722,11 +722,37 @@ namespace MediaBrowser.Api.Playback.Hls //return state.VideoRequest.VideoBitRate.HasValue; } + /// + /// Get the H.26X level of the output video stream. + /// + /// StreamState of the current stream. + /// H.26X level of the output video stream. + private int? GetOutputVideoCodecLevel(StreamState state) + { + string levelString; + if (string.Equals(state.OutputVideoCodec, "copy", StringComparison.OrdinalIgnoreCase) + && 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; + } + /// /// Gets a formatted string of the output audio codec, for use in the CODECS field. /// /// - /// + /// /// StreamState of the current stream. /// Formatted audio codec string. private string GetPlaylistAudioCodecs(StreamState state) @@ -761,18 +787,24 @@ namespace MediaBrowser.Api.Playback.Hls /// /// StreamState of the current stream. /// Formatted video codec string. - private string GetPlaylistVideoCodecs(StreamState state) + private string GetPlaylistVideoCodecs(StreamState state, string codec, int level) { - int level = Convert.ToInt32(state.GetRequestedLevel(state.ActualOutputVideoCodec)); + 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(state.ActualOutputVideoCodec, "h264", StringComparison.OrdinalIgnoreCase)) + if (string.Equals(codec, "h264", StringComparison.OrdinalIgnoreCase)) { string profile = state.GetRequestedProfiles("h264").FirstOrDefault(); return HlsCodecStringFactory.GetH264String(profile, level); } - else if (string.Equals(state.ActualOutputVideoCodec, "h265", StringComparison.OrdinalIgnoreCase) - || string.Equals(state.ActualOutputVideoCodec, "hevc", StringComparison.OrdinalIgnoreCase)) + else if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) + || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase)) { string profile = state.GetRequestedProfiles("h265").FirstOrDefault(); @@ -787,7 +819,7 @@ namespace MediaBrowser.Api.Playback.Hls /// the active streams output video and audio codecs. /// /// - /// + /// /// /// StringBuilder to append the field to. /// StreamState of the current stream. @@ -795,9 +827,10 @@ namespace MediaBrowser.Api.Playback.Hls { // Video string videoCodecs = string.Empty; - if (!string.IsNullOrEmpty(state.ActualOutputVideoCodec)) + int? videoCodecLevel = GetOutputVideoCodecLevel(state); + if (!string.IsNullOrEmpty(state.ActualOutputVideoCodec) && videoCodecLevel.HasValue) { - videoCodecs = GetPlaylistVideoCodecs(state); + videoCodecs = GetPlaylistVideoCodecs(state, state.ActualOutputVideoCodec, videoCodecLevel.Value); } // Audio @@ -807,26 +840,17 @@ namespace MediaBrowser.Api.Playback.Hls audioCodecs = GetPlaylistAudioCodecs(state); } - if (!string.IsNullOrEmpty(videoCodecs) || !string.IsNullOrEmpty(audioCodecs)) + StringBuilder codecs = new StringBuilder(); + + codecs.Append(videoCodecs) + .Append(',') + .Append(audioCodecs); + + if (codecs.Length > 1) { - builder.Append(",CODECS=\""); - - if (!string.IsNullOrEmpty(videoCodecs) && !string.IsNullOrEmpty(audioCodecs)) - { - builder.Append(videoCodecs) - .Append(',') - .Append(audioCodecs); - } - else if (!string.IsNullOrEmpty(videoCodecs)) - { - builder.Append(videoCodecs); - } - else if (!string.IsNullOrEmpty(audioCodecs)) - { - builder.Append(audioCodecs); - } - - builder.Append('"'); + builder.Append(",CODECS=\"") + .Append(codecs) + .Append('"'); } }