mirror of
https://github.com/jellyfin/jellyfin.git
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419 lines
14 KiB
C#
419 lines
14 KiB
C#
using MediaBrowser.Common.MediaInfo;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.MediaInfo;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.Serialization;
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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.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.Providers.MediaInfo
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{
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/// <summary>
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/// Provides a base class for extracting media information through ffprobe
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public abstract class BaseFFProbeProvider<T> : BaseMetadataProvider
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where T : BaseItem, IHasMediaStreams
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{
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protected BaseFFProbeProvider(ILogManager logManager, IServerConfigurationManager configurationManager, IMediaEncoder mediaEncoder, IJsonSerializer jsonSerializer)
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: base(logManager, configurationManager)
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{
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JsonSerializer = jsonSerializer;
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MediaEncoder = mediaEncoder;
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}
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protected readonly IMediaEncoder MediaEncoder;
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protected readonly IJsonSerializer JsonSerializer;
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/// <summary>
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/// Gets the priority.
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/// </summary>
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/// <value>The priority.</value>
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public override MetadataProviderPriority Priority
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{
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get { return MetadataProviderPriority.First; }
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}
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protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
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/// Supportses the specified item.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
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public override bool Supports(BaseItem item)
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{
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return item.LocationType == LocationType.FileSystem && item is T;
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}
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/// <summary>
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/// Override this to return the date that should be compared to the last refresh date
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/// to determine if this provider should be re-fetched.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns>DateTime.</returns>
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protected override DateTime CompareDate(BaseItem item)
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{
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return item.DateModified;
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}
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/// <summary>
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/// The null mount task result
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/// </summary>
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protected readonly Task<IIsoMount> NullMountTaskResult = Task.FromResult<IIsoMount>(null);
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/// <summary>
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/// Gets the provider version.
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/// </summary>
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/// <value>The provider version.</value>
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protected override string ProviderVersion
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{
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get
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{
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return MediaEncoder.Version;
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}
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}
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/// <summary>
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/// Gets a value indicating whether [refresh on version change].
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/// </summary>
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/// <value><c>true</c> if [refresh on version change]; otherwise, <c>false</c>.</value>
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protected override bool RefreshOnVersionChange
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{
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get
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{
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return true;
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}
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}
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/// <summary>
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/// Gets the media info.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="isoMount">The iso mount.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task{MediaInfoResult}.</returns>
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/// <exception cref="System.ArgumentNullException">inputPath
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/// or
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/// cache</exception>
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protected async Task<MediaInfoResult> GetMediaInfo(BaseItem item, IIsoMount isoMount, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var type = InputType.AudioFile;
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var inputPath = isoMount == null ? new[] { item.Path } : new[] { isoMount.MountedPath };
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var video = item as Video;
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if (video != null)
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{
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inputPath = MediaEncoderHelpers.GetInputArgument(video, isoMount, out type);
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}
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return await MediaEncoder.GetMediaInfo(inputPath, type, cancellationToken).ConfigureAwait(false);
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}
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/// <summary>
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/// Mounts the iso if needed.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>IsoMount.</returns>
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protected virtual Task<IIsoMount> MountIsoIfNeeded(T item, CancellationToken cancellationToken)
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{
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return NullMountTaskResult;
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}
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/// <summary>
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/// Called when [pre fetch].
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="mount">The mount.</param>
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protected virtual void OnPreFetch(T item, IIsoMount mount)
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{
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}
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/// <summary>
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/// Normalizes the FF probe result.
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/// </summary>
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/// <param name="result">The result.</param>
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protected void NormalizeFFProbeResult(MediaInfoResult result)
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{
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if (result.format != null && result.format.tags != null)
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{
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result.format.tags = ConvertDictionaryToCaseInSensitive(result.format.tags);
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}
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if (result.streams != null)
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{
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// Convert all dictionaries to case insensitive
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foreach (var stream in result.streams)
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{
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if (stream.tags != null)
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{
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stream.tags = ConvertDictionaryToCaseInSensitive(stream.tags);
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}
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if (stream.disposition != null)
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{
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stream.disposition = ConvertDictionaryToCaseInSensitive(stream.disposition);
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}
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}
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}
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}
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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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protected 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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};
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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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}
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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 = 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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}
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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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if (stream.Type != MediaStreamType.Subtitle)
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{
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if (!string.IsNullOrEmpty(streamInfo.bit_rate))
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{
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stream.BitRate = int.Parse(streamInfo.bit_rate, UsCulture);
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}
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else if (formatInfo != null && !string.IsNullOrEmpty(formatInfo.bit_rate))
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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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stream.BitRate = int.Parse(formatInfo.bit_rate, UsCulture);
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}
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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 string GetAspectRatio(MediaStreamInfo info)
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{
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if (info.height > 0 && info.width > 0)
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{
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double ratio = info.width;
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ratio /= info.height;
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if (IsClose(ratio, 1.777777778))
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{
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return "16:9";
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}
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if (IsClose(ratio, 1.3333333333))
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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))
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{
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return "1.85:1";
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}
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if (IsClose(ratio, 2.39))
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{
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return "2.39:1";
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}
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if (IsClose(ratio, 2.4))
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{
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return "2.4:1";
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}
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}
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return info.display_aspect_ratio;
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}
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private bool IsClose(double d1, double d2)
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{
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return Math.Abs(d1 - d2) <= .005;
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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 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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/// <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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protected 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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/// <summary>
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/// Gets an int 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.Nullable{System.Int32}.</returns>
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protected int? GetDictionaryNumericValue(Dictionary<string, string> tags, string key)
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{
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var val = GetDictionaryValue(tags, key);
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if (!string.IsNullOrEmpty(val))
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{
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int i;
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if (int.TryParse(val, out i))
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{
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return i;
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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 DateTime 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.Nullable{DateTime}.</returns>
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protected DateTime? GetDictionaryDateTime(Dictionary<string, string> tags, string key)
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{
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var val = GetDictionaryValue(tags, key);
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if (!string.IsNullOrEmpty(val))
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{
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DateTime i;
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if (DateTime.TryParse(val, out i))
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{
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return i.ToUniversalTime();
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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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/// Converts a dictionary to case insensitive
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/// </summary>
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/// <param name="dict">The dict.</param>
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/// <returns>Dictionary{System.StringSystem.String}.</returns>
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private Dictionary<string, string> ConvertDictionaryToCaseInSensitive(Dictionary<string, string> dict)
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{
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return new Dictionary<string, string>(dict, StringComparer.OrdinalIgnoreCase);
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}
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}
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}
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