jellyfin-server/MediaBrowser.Server.Implementations/Playlists/PlaylistImageProvider.cs

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using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Entities.TV;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Playlists;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MoreLinq;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.Playlists
{
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public class PlaylistImageProvider : ICustomMetadataProvider<Playlist>, IHasChangeMonitor
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{
private readonly IFileSystem _fileSystem;
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private readonly IProviderManager _provider;
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public PlaylistImageProvider(IFileSystem fileSystem, IProviderManager provider)
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{
_fileSystem = fileSystem;
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_provider = provider;
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}
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public async Task<ItemUpdateType> FetchAsync(Playlist item, MetadataRefreshOptions options, CancellationToken cancellationToken)
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{
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var primaryResult = await FetchAsync(item, ImageType.Primary, options, cancellationToken).ConfigureAwait(false);
var thumbResult = await FetchAsync(item, ImageType.Thumb, options, cancellationToken).ConfigureAwait(false);
return primaryResult | thumbResult;
}
public async Task<ItemUpdateType> FetchAsync(PhotoAlbum item, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
var primaryResult = await FetchAsync(item, ImageType.Primary, options, cancellationToken).ConfigureAwait(false);
var thumbResult = await FetchAsync(item, ImageType.Thumb, options, cancellationToken).ConfigureAwait(false);
return primaryResult | thumbResult;
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}
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private Task<ItemUpdateType> FetchAsync(IHasImages item, ImageType imageType, MetadataRefreshOptions options, CancellationToken cancellationToken)
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{
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var items = GetItemsWithImages(item);
var cacheKey = GetConfigurationCacheKey(items);
if (!HasChanged(item, imageType, cacheKey))
{
return Task.FromResult(ItemUpdateType.None);
}
return FetchAsyncInternal(item, imageType, cacheKey, options, cancellationToken);
}
private async Task<ItemUpdateType> FetchAsyncInternal(IHasImages item, ImageType imageType, string cacheKey, MetadataRefreshOptions options, CancellationToken cancellationToken)
{
var img = await CreateImageAsync(item, imageType, 0).ConfigureAwait(false);
if (img == null)
{
return ItemUpdateType.None;
}
using (var ms = new MemoryStream())
{
img.Save(ms, ImageFormat.Png);
ms.Position = 0;
await _provider.SaveImage(item, ms, "image/png", imageType, null, cacheKey, cancellationToken).ConfigureAwait(false);
}
return ItemUpdateType.ImageUpdate;
}
private bool HasChanged(IHasImages item, ImageType type, string cacheKey)
{
var image = item.GetImageInfo(type, 0);
if (image != null)
{
if (!_fileSystem.ContainsSubPath(item.GetInternalMetadataPath(), image.Path))
{
return false;
}
var currentPathCacheKey = (Path.GetFileNameWithoutExtension(image.Path) ?? string.Empty).Split('_').LastOrDefault();
if (string.Equals(cacheKey, currentPathCacheKey, StringComparison.OrdinalIgnoreCase))
{
return false;
}
}
return true;
}
private const string Version = "3";
public string GetConfigurationCacheKey(List<BaseItem> items)
{
return (Version + "_" + string.Join(",", items.Select(i => i.Id.ToString("N")).ToArray())).GetMD5().ToString("N");
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}
private List<BaseItem> GetItemsWithImages(IHasImages item)
{
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var photoAlbum = item as PhotoAlbum;
if (photoAlbum != null)
{
return GetFinalItems(photoAlbum.RecursiveChildren.Where(i => i is Photo).ToList());
}
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var playlist = (Playlist)item;
var items = playlist.GetManageableItems()
.Select(i =>
{
var subItem = i.Item2;
var episode = subItem as Episode;
if (episode != null)
{
var series = episode.Series;
if (series != null && series.HasImage(ImageType.Primary))
{
return series;
}
}
if (subItem.HasImage(ImageType.Primary))
{
return subItem;
}
var parent = subItem.Parent;
if (parent != null && parent.HasImage(ImageType.Primary))
{
if (parent is MusicAlbum)
{
return parent;
}
}
return null;
})
.Where(i => i != null)
.DistinctBy(i => i.Id)
.ToList();
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return GetFinalItems(items);
}
private List<BaseItem> GetFinalItems(List<BaseItem> items)
{
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// Rotate the images no more than once per day
var random = new Random(DateTime.Now.DayOfYear).Next();
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return items
.OrderBy(i => random - items.IndexOf(i))
.Take(4)
.OrderBy(i => i.Name)
.ToList();
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}
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public async Task<Image> CreateImageAsync(IHasImages item, ImageType imageType, int imageIndex)
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{
var items = GetItemsWithImages(item);
if (items.Count == 0)
{
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return null;
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}
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return imageType == ImageType.Thumb ?
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await GetThumbCollage(items).ConfigureAwait(false) :
await GetSquareCollage(items).ConfigureAwait(false);
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}
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private Task<Image> GetThumbCollage(List<BaseItem> items)
{
return GetThumbCollage(items.Select(i => i.GetImagePath(ImageType.Primary)).ToList());
}
private Task<Image> GetSquareCollage(List<BaseItem> items)
{
return GetSquareCollage(items.Select(i => i.GetImagePath(ImageType.Primary)).ToList());
}
private async Task<Image> GetThumbCollage(List<string> files)
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{
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if (files.Count < 3)
{
return await GetSingleImage(files).ConfigureAwait(false);
}
const int rows = 1;
const int cols = 3;
const int cellWidth = 2 * (ThumbImageWidth / 3);
const int cellHeight = ThumbImageHeight;
var index = 0;
var img = new Bitmap(ThumbImageWidth, ThumbImageHeight, PixelFormat.Format32bppPArgb);
using (var graphics = Graphics.FromImage(img))
{
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.CompositingMode = CompositingMode.SourceCopy;
for (var row = 0; row < rows; row++)
{
for (var col = 0; col < cols; col++)
{
var x = col * (cellWidth / 2);
var y = row * cellHeight;
if (files.Count > index)
{
using (var fileStream = _fileSystem.GetFileStream(files[index], FileMode.Open, FileAccess.Read, FileShare.Read, true))
{
using (var memoryStream = new MemoryStream())
{
await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
memoryStream.Position = 0;
using (var imgtemp = Image.FromStream(memoryStream, true, false))
{
graphics.DrawImage(imgtemp, x, y, cellWidth, cellHeight);
}
}
}
}
index++;
}
}
}
return img;
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}
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private const int SquareImageSize = 800;
private const int ThumbImageWidth = 1600;
private const int ThumbImageHeight = 900;
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private async Task<Image> GetSquareCollage(List<string> files)
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{
if (files.Count < 4)
{
return await GetSingleImage(files).ConfigureAwait(false);
}
const int rows = 2;
const int cols = 2;
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const int singleSize = SquareImageSize / 2;
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var index = 0;
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var img = new Bitmap(SquareImageSize, SquareImageSize, PixelFormat.Format32bppPArgb);
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using (var graphics = Graphics.FromImage(img))
{
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.CompositingMode = CompositingMode.SourceCopy;
for (var row = 0; row < rows; row++)
{
for (var col = 0; col < cols; col++)
{
var x = col * singleSize;
var y = row * singleSize;
using (var fileStream = _fileSystem.GetFileStream(files[index], FileMode.Open, FileAccess.Read, FileShare.Read, true))
{
using (var memoryStream = new MemoryStream())
{
await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
memoryStream.Position = 0;
using (var imgtemp = Image.FromStream(memoryStream, true, false))
{
graphics.DrawImage(imgtemp, x, y, singleSize, singleSize);
}
}
}
index++;
}
}
}
return img;
}
private Task<Image> GetSingleImage(List<string> files)
{
return GetImage(files[0]);
}
private async Task<Image> GetImage(string file)
{
using (var fileStream = _fileSystem.GetFileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, true))
{
var memoryStream = new MemoryStream();
await fileStream.CopyToAsync(memoryStream).ConfigureAwait(false);
memoryStream.Position = 0;
return Image.FromStream(memoryStream, true, false);
}
}
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public string Name
{
get { return "Dynamic Image Provider"; }
}
public bool HasChanged(IHasMetadata item, IDirectoryService directoryService, DateTime date)
{
var items = GetItemsWithImages(item);
var cacheKey = GetConfigurationCacheKey(items);
return HasChanged(item, ImageType.Primary, cacheKey) || HasChanged(item, ImageType.Thumb, cacheKey);
}
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}
}