jellyfin/MediaBrowser.Controller/Providers/MediaInfo/BaseFFProbeProvider.cs

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using MediaBrowser.Common.IO;
using MediaBrowser.Common.MediaInfo;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Serialization;
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using System;
using System.Collections.Generic;
using System.Globalization;
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using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.Providers.MediaInfo
{
/// <summary>
/// Provides a base class for extracting media information through ffprobe
/// </summary>
/// <typeparam name="T"></typeparam>
public abstract class BaseFFProbeProvider<T> : BaseFFMpegProvider<T>
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where T : BaseItem
{
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protected BaseFFProbeProvider(ILogManager logManager, IServerConfigurationManager configurationManager, IMediaEncoder mediaEncoder, IJsonSerializer jsonSerializer)
: base(logManager, configurationManager, mediaEncoder)
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{
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JsonSerializer = jsonSerializer;
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}
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protected readonly IJsonSerializer JsonSerializer;
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/// <summary>
/// Gets the priority.
/// </summary>
/// <value>The priority.</value>
public override MetadataProviderPriority Priority
{
// Give this second priority
// Give metadata xml providers a chance to fill in data first, so that we can skip this whenever possible
get { return MetadataProviderPriority.Second; }
}
protected readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
/// Fetches metadata and returns true or false indicating if any work that requires persistence was done
/// </summary>
/// <param name="item">The item.</param>
/// <param name="force">if set to <c>true</c> [force].</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task{System.Boolean}.</returns>
public override async Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
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{
var myItem = (T)item;
var isoMount = await MountIsoIfNeeded(myItem, cancellationToken).ConfigureAwait(false);
try
{
OnPreFetch(myItem, isoMount);
var result = await GetMediaInfo(item, isoMount, cancellationToken).ConfigureAwait(false);
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cancellationToken.ThrowIfCancellationRequested();
NormalizeFFProbeResult(result);
cancellationToken.ThrowIfCancellationRequested();
Fetch(myItem, cancellationToken, result, isoMount);
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var video = myItem as Video;
if (video != null)
{
await Kernel.Instance.FFMpegManager.PopulateChapterImages(video, cancellationToken, false, false).ConfigureAwait(false);
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}
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SetLastRefreshed(item, DateTime.UtcNow);
}
finally
{
if (isoMount != null)
{
isoMount.Dispose();
}
}
return true;
}
/// <summary>
/// Gets the media info.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="isoMount">The iso mount.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task{MediaInfoResult}.</returns>
/// <exception cref="System.ArgumentNullException">inputPath
/// or
/// cache</exception>
private async Task<MediaInfoResult> GetMediaInfo(BaseItem item, IIsoMount isoMount, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var type = InputType.AudioFile;
var inputPath = isoMount == null ? new[] { item.Path } : new[] { isoMount.MountedPath };
var video = item as Video;
if (video != null)
{
inputPath = MediaEncoderHelpers.GetInputArgument(video, isoMount, out type);
}
return await MediaEncoder.GetMediaInfo(inputPath, type, cancellationToken).ConfigureAwait(false);
}
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/// <summary>
/// Mounts the iso if needed.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>IsoMount.</returns>
protected virtual Task<IIsoMount> MountIsoIfNeeded(T item, CancellationToken cancellationToken)
{
return NullMountTaskResult;
}
/// <summary>
/// Called when [pre fetch].
/// </summary>
/// <param name="item">The item.</param>
/// <param name="mount">The mount.</param>
protected virtual void OnPreFetch(T item, IIsoMount mount)
{
}
/// <summary>
/// Normalizes the FF probe result.
/// </summary>
/// <param name="result">The result.</param>
private void NormalizeFFProbeResult(MediaInfoResult result)
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{
if (result.format != null && result.format.tags != null)
{
result.format.tags = ConvertDictionaryToCaseInSensitive(result.format.tags);
}
if (result.streams != null)
{
// Convert all dictionaries to case insensitive
foreach (var stream in result.streams)
{
if (stream.tags != null)
{
stream.tags = ConvertDictionaryToCaseInSensitive(stream.tags);
}
if (stream.disposition != null)
{
stream.disposition = ConvertDictionaryToCaseInSensitive(stream.disposition);
}
}
}
}
/// <summary>
/// Subclasses must set item values using this
/// </summary>
/// <param name="item">The item.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="result">The result.</param>
/// <param name="isoMount">The iso mount.</param>
/// <returns>Task.</returns>
protected abstract void Fetch(T item, CancellationToken cancellationToken, MediaInfoResult result, IIsoMount isoMount);
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/// <summary>
/// Converts ffprobe stream info to our MediaStream class
/// </summary>
/// <param name="streamInfo">The stream info.</param>
/// <param name="formatInfo">The format info.</param>
/// <returns>MediaStream.</returns>
protected MediaStream GetMediaStream(MediaStreamInfo streamInfo, MediaFormatInfo formatInfo)
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{
var stream = new MediaStream
{
Codec = streamInfo.codec_name,
Language = GetDictionaryValue(streamInfo.tags, "language"),
Profile = streamInfo.profile,
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Level = streamInfo.level,
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Index = streamInfo.index
};
if (streamInfo.codec_type.Equals("audio", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Audio;
stream.Channels = streamInfo.channels;
if (!string.IsNullOrEmpty(streamInfo.sample_rate))
{
stream.SampleRate = int.Parse(streamInfo.sample_rate, UsCulture);
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}
}
else if (streamInfo.codec_type.Equals("subtitle", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Subtitle;
}
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else if (streamInfo.codec_type.Equals("video", StringComparison.OrdinalIgnoreCase))
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{
stream.Type = MediaStreamType.Video;
stream.Width = streamInfo.width;
stream.Height = streamInfo.height;
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stream.PixelFormat = streamInfo.pix_fmt;
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stream.AspectRatio = streamInfo.display_aspect_ratio;
stream.AverageFrameRate = GetFrameRate(streamInfo.avg_frame_rate);
stream.RealFrameRate = GetFrameRate(streamInfo.r_frame_rate);
}
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else
{
return null;
}
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// Get stream bitrate
if (stream.Type != MediaStreamType.Subtitle)
{
if (!string.IsNullOrEmpty(streamInfo.bit_rate))
{
stream.BitRate = int.Parse(streamInfo.bit_rate, UsCulture);
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}
else if (formatInfo != null && !string.IsNullOrEmpty(formatInfo.bit_rate))
{
// If the stream info doesn't have a bitrate get the value from the media format info
stream.BitRate = int.Parse(formatInfo.bit_rate, UsCulture);
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}
}
if (streamInfo.disposition != null)
{
var isDefault = GetDictionaryValue(streamInfo.disposition, "default");
var isForced = GetDictionaryValue(streamInfo.disposition, "forced");
stream.IsDefault = string.Equals(isDefault, "1", StringComparison.OrdinalIgnoreCase);
stream.IsForced = string.Equals(isForced, "1", StringComparison.OrdinalIgnoreCase);
}
return stream;
}
/// <summary>
/// Gets a frame rate from a string value in ffprobe output
/// This could be a number or in the format of 2997/125.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>System.Nullable{System.Single}.</returns>
private float? GetFrameRate(string value)
{
if (!string.IsNullOrEmpty(value))
{
var parts = value.Split('/');
float result;
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if (parts.Length == 2)
{
result = float.Parse(parts[0], UsCulture) / float.Parse(parts[1], UsCulture);
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}
else
{
result = float.Parse(parts[0], UsCulture);
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}
return float.IsNaN(result) ? (float?)null : result;
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}
return null;
}
/// <summary>
/// Gets a string from an FFProbeResult tags dictionary
/// </summary>
/// <param name="tags">The tags.</param>
/// <param name="key">The key.</param>
/// <returns>System.String.</returns>
protected string GetDictionaryValue(Dictionary<string, string> tags, string key)
{
if (tags == null)
{
return null;
}
string val;
tags.TryGetValue(key, out val);
return val;
}
/// <summary>
/// Gets an int from an FFProbeResult tags dictionary
/// </summary>
/// <param name="tags">The tags.</param>
/// <param name="key">The key.</param>
/// <returns>System.Nullable{System.Int32}.</returns>
protected int? GetDictionaryNumericValue(Dictionary<string, string> tags, string key)
{
var val = GetDictionaryValue(tags, key);
if (!string.IsNullOrEmpty(val))
{
int i;
if (int.TryParse(val, out i))
{
return i;
}
}
return null;
}
/// <summary>
/// Gets a DateTime from an FFProbeResult tags dictionary
/// </summary>
/// <param name="tags">The tags.</param>
/// <param name="key">The key.</param>
/// <returns>System.Nullable{DateTime}.</returns>
protected DateTime? GetDictionaryDateTime(Dictionary<string, string> tags, string key)
{
var val = GetDictionaryValue(tags, key);
if (!string.IsNullOrEmpty(val))
{
DateTime i;
if (DateTime.TryParse(val, out i))
{
return i.ToUniversalTime();
}
}
return null;
}
/// <summary>
/// Converts a dictionary to case insensitive
/// </summary>
/// <param name="dict">The dict.</param>
/// <returns>Dictionary{System.StringSystem.String}.</returns>
private Dictionary<string, string> ConvertDictionaryToCaseInSensitive(Dictionary<string, string> dict)
{
return new Dictionary<string, string>(dict, StringComparer.OrdinalIgnoreCase);
}
}
}