mirror of
https://github.com/jellyfin/jellyfin.git
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249 lines
8.3 KiB
C#
249 lines
8.3 KiB
C#
using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Entities.Audio;
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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.Linq;
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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 "ffmpeg20131209";
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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<InternalMediaInfoResult> GetMediaInfo(BaseItem item, IIsoMount isoMount, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var type = InputType.File;
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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.Path, video.LocationType == LocationType.Remote, video.VideoType, video.IsoType, isoMount, video.PlayableStreamFileNames, out type);
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}
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return await MediaEncoder.GetMediaInfo(inputPath, type, item is Audio, 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(InternalMediaInfoResult 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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/// 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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