334 lines
10 KiB
C#
334 lines
10 KiB
C#
using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.MediaInfo;
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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namespace MediaBrowser.Controller.MediaEncoding
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{
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/// <summary>
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/// Class MediaEncoderHelpers
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/// </summary>
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public static class MediaEncoderHelpers
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{
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/// <summary>
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/// Gets the input argument.
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/// </summary>
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/// <param name="videoPath">The video path.</param>
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/// <param name="protocol">The protocol.</param>
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/// <param name="isoMount">The iso mount.</param>
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/// <param name="playableStreamFileNames">The playable stream file names.</param>
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/// <returns>System.String[][].</returns>
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public static string[] GetInputArgument(string videoPath, MediaProtocol protocol, IIsoMount isoMount, List<string> playableStreamFileNames)
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{
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if (playableStreamFileNames.Count > 0)
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{
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if (isoMount == null)
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{
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return GetPlayableStreamFiles(videoPath, playableStreamFileNames).ToArray();
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}
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return GetPlayableStreamFiles(isoMount.MountedPath, playableStreamFileNames).ToArray();
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}
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return new[] {videoPath};
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}
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public static List<string> GetPlayableStreamFiles(string rootPath, IEnumerable<string> filenames)
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{
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var allFiles = Directory
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.EnumerateFiles(rootPath, "*", SearchOption.AllDirectories)
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.ToList();
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return filenames.Select(name => allFiles.FirstOrDefault(f => string.Equals(Path.GetFileName(f), name, StringComparison.OrdinalIgnoreCase)))
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.Where(f => !string.IsNullOrEmpty(f))
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.ToList();
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}
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public static MediaInfo GetMediaInfo(InternalMediaInfoResult data)
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{
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var internalStreams = data.streams ?? new MediaStreamInfo[] { };
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var info = new MediaInfo
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{
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MediaStreams = internalStreams.Select(s => GetMediaStream(s, data.format))
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.Where(i => i != null)
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.ToList()
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};
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if (data.format != null)
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{
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info.Format = data.format.format_name;
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if (!string.IsNullOrEmpty(data.format.bit_rate))
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{
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info.TotalBitrate = int.Parse(data.format.bit_rate, UsCulture);
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}
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}
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return info;
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}
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private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
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/// Converts ffprobe stream info to our MediaStream class
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/// </summary>
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/// <param name="streamInfo">The stream info.</param>
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/// <param name="formatInfo">The format info.</param>
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/// <returns>MediaStream.</returns>
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private static MediaStream GetMediaStream(MediaStreamInfo streamInfo, MediaFormatInfo formatInfo)
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{
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var stream = new MediaStream
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{
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Codec = streamInfo.codec_name,
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Profile = streamInfo.profile,
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Level = streamInfo.level,
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Index = streamInfo.index,
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PixelFormat = streamInfo.pix_fmt
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};
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if (streamInfo.tags != null)
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{
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stream.Language = GetDictionaryValue(streamInfo.tags, "language");
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}
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if (string.Equals(streamInfo.codec_type, "audio", StringComparison.OrdinalIgnoreCase))
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{
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stream.Type = MediaStreamType.Audio;
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stream.Channels = streamInfo.channels;
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if (!string.IsNullOrEmpty(streamInfo.sample_rate))
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{
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stream.SampleRate = int.Parse(streamInfo.sample_rate, UsCulture);
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}
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stream.ChannelLayout = ParseChannelLayout(streamInfo.channel_layout);
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}
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else if (string.Equals(streamInfo.codec_type, "subtitle", StringComparison.OrdinalIgnoreCase))
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{
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stream.Type = MediaStreamType.Subtitle;
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}
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else if (string.Equals(streamInfo.codec_type, "video", StringComparison.OrdinalIgnoreCase))
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{
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stream.Type = (streamInfo.codec_name ?? string.Empty).IndexOf("mjpeg", StringComparison.OrdinalIgnoreCase) != -1
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? MediaStreamType.EmbeddedImage
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: MediaStreamType.Video;
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stream.Width = streamInfo.width;
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stream.Height = streamInfo.height;
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stream.AspectRatio = GetAspectRatio(streamInfo);
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stream.AverageFrameRate = GetFrameRate(streamInfo.avg_frame_rate);
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stream.RealFrameRate = GetFrameRate(streamInfo.r_frame_rate);
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stream.BitDepth = GetBitDepth(stream.PixelFormat);
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stream.IsAnamorphic = string.Equals(streamInfo.sample_aspect_ratio, "0:1",
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StringComparison.OrdinalIgnoreCase);
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}
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else
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{
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return null;
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}
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// Get stream bitrate
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var bitrate = 0;
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if (!string.IsNullOrEmpty(streamInfo.bit_rate))
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{
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bitrate = int.Parse(streamInfo.bit_rate, UsCulture);
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}
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else if (formatInfo != null && !string.IsNullOrEmpty(formatInfo.bit_rate) && stream.Type == MediaStreamType.Video)
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{
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// If the stream info doesn't have a bitrate get the value from the media format info
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bitrate = int.Parse(formatInfo.bit_rate, UsCulture);
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}
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if (bitrate > 0)
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{
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stream.BitRate = bitrate;
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}
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if (streamInfo.disposition != null)
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{
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var isDefault = GetDictionaryValue(streamInfo.disposition, "default");
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var isForced = GetDictionaryValue(streamInfo.disposition, "forced");
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stream.IsDefault = string.Equals(isDefault, "1", StringComparison.OrdinalIgnoreCase);
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stream.IsForced = string.Equals(isForced, "1", StringComparison.OrdinalIgnoreCase);
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}
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return stream;
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}
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private static int? GetBitDepth(string pixelFormat)
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{
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var eightBit = new List<string>
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{
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"yuv420p",
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"yuv411p",
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"yuvj420p",
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"uyyvyy411",
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"nv12",
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"nv21",
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"rgb444le",
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"rgb444be",
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"bgr444le",
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"bgr444be",
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"yuvj411p"
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};
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if (!string.IsNullOrEmpty(pixelFormat))
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{
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if (eightBit.Contains(pixelFormat, StringComparer.OrdinalIgnoreCase))
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{
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return 8;
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}
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}
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return null;
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}
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/// <summary>
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/// Gets a string from an FFProbeResult tags dictionary
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/// </summary>
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/// <param name="tags">The tags.</param>
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/// <param name="key">The key.</param>
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/// <returns>System.String.</returns>
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private static string GetDictionaryValue(Dictionary<string, string> tags, string key)
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{
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if (tags == null)
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{
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return null;
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}
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string val;
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tags.TryGetValue(key, out val);
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return val;
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}
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private static string ParseChannelLayout(string input)
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{
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if (string.IsNullOrEmpty(input))
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{
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return input;
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}
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return input.Split('(').FirstOrDefault();
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}
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private static string GetAspectRatio(MediaStreamInfo info)
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{
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var original = info.display_aspect_ratio;
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int height;
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int width;
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var parts = (original ?? string.Empty).Split(':');
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if (!(parts.Length == 2 &&
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int.TryParse(parts[0], NumberStyles.Any, UsCulture, out width) &&
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int.TryParse(parts[1], NumberStyles.Any, UsCulture, out height) &&
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width > 0 &&
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height > 0))
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{
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width = info.width;
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height = info.height;
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}
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if (width > 0 && height > 0)
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{
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double ratio = width;
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ratio /= height;
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if (IsClose(ratio, 1.777777778, .03))
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{
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return "16:9";
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}
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if (IsClose(ratio, 1.3333333333, .05))
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{
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return "4:3";
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}
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if (IsClose(ratio, 1.41))
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{
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return "1.41:1";
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}
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if (IsClose(ratio, 1.5))
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{
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return "1.5:1";
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}
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if (IsClose(ratio, 1.6))
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{
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return "1.6:1";
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}
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if (IsClose(ratio, 1.66666666667))
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{
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return "5:3";
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}
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if (IsClose(ratio, 1.85, .02))
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{
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return "1.85:1";
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}
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if (IsClose(ratio, 2.35, .025))
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{
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return "2.35:1";
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}
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if (IsClose(ratio, 2.4, .025))
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{
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return "2.40:1";
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}
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}
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return original;
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}
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private static bool IsClose(double d1, double d2, double variance = .005)
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{
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return Math.Abs(d1 - d2) <= variance;
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}
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/// <summary>
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/// Gets a frame rate from a string value in ffprobe output
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/// This could be a number or in the format of 2997/125.
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/// </summary>
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/// <param name="value">The value.</param>
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/// <returns>System.Nullable{System.Single}.</returns>
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private static float? GetFrameRate(string value)
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{
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if (!string.IsNullOrEmpty(value))
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{
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var parts = value.Split('/');
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float result;
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if (parts.Length == 2)
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{
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result = float.Parse(parts[0], UsCulture) / float.Parse(parts[1], UsCulture);
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}
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else
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{
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result = float.Parse(parts[0], UsCulture);
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}
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return float.IsNaN(result) ? (float?)null : result;
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}
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return null;
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}
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}
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}
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