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using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net.Mime;
using System.Text;
using Jellyfin.Api.Attributes;
using Jellyfin.Api.Extensions;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Trickplay;
using MediaBrowser.Model;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
namespace Jellyfin.Api.Controllers;
/// <summary>
/// Trickplay controller.
/// </summary>
[Route("")]
[Authorize]
public class TrickplayController : BaseJellyfinApiController
{
private readonly ILibraryManager _libraryManager;
private readonly ITrickplayManager _trickplayManager;
/// <summary>
/// Initializes a new instance of the <see cref="TrickplayController"/> class.
/// </summary>
/// <param name="libraryManager">Instance of <see cref="ILibraryManager"/>.</param>
/// <param name="trickplayManager">Instance of <see cref="ITrickplayManager"/>.</param>
public TrickplayController(
ILibraryManager libraryManager,
ITrickplayManager trickplayManager)
{
_libraryManager = libraryManager;
_trickplayManager = trickplayManager;
}
/// <summary>
/// Gets an image tiles playlist for trickplay.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="width">The width of a single tile.</param>
/// <param name="mediaSourceId">The media version id, if using an alternate version.</param>
/// <response code="200">Tiles stream returned.</response>
/// <returns>A <see cref="FileResult"/> containing the trickplay tiles file.</returns>
[HttpGet("Videos/{itemId}/Trickplay/{width}/tiles.m3u8")]
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesPlaylistFile]
public ActionResult GetTrickplayHlsPlaylist(
[FromRoute, Required] Guid itemId,
[FromRoute, Required] int width,
[FromQuery] Guid? mediaSourceId)
{
return GetTrickplayPlaylistInternal(width, mediaSourceId ?? itemId);
}
/// <summary>
/// Gets a trickplay tile grid image.
/// </summary>
/// <param name="itemId">The item id.</param>
/// <param name="width">The width of a single tile.</param>
/// <param name="index">The index of the desired tile grid.</param>
/// <param name="mediaSourceId">The media version id, if using an alternate version.</param>
/// <response code="200">Tiles image returned.</response>
/// <response code="200">Tiles image not found at specified index.</response>
/// <returns>A <see cref="FileResult"/> containing the trickplay tiles image.</returns>
[HttpGet("Videos/{itemId}/Trickplay/{width}/{index}.jpg")]
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status404NotFound)]
[ProducesImageFile]
public ActionResult GetTrickplayHlsPlaylist(
[FromRoute, Required] Guid itemId,
[FromRoute, Required] int width,
[FromRoute, Required] int index,
[FromQuery] Guid? mediaSourceId)
{
var item = _libraryManager.GetItemById(mediaSourceId ?? itemId);
if (item is null)
{
return NotFound();
}
var path = _trickplayManager.GetTrickplayTilePath(item, width, index);
if (System.IO.File.Exists(path))
{
return PhysicalFile(path, MediaTypeNames.Image.Jpeg);
}
return NotFound();
}
private ActionResult GetTrickplayPlaylistInternal(int width, Guid mediaSourceId)
{
var tilesResolutions = _trickplayManager.GetTilesResolutions(mediaSourceId);
if (tilesResolutions is not null && tilesResolutions.TryGetValue(width, out var tilesInfo))
{
var builder = new StringBuilder(128);
if (tilesInfo.TileCount > 0)
{
const string urlFormat = "Trickplay/{0}/{1}.jpg?MediaSourceId={2}&api_key={3}";
const string decimalFormat = "{0:0.###}";
var resolution = $"{tilesInfo.Width}x{tilesInfo.Height}";
var layout = $"{tilesInfo.TileWidth}x{tilesInfo.TileHeight}";
var tilesPerGrid = tilesInfo.TileWidth * tilesInfo.TileHeight;
var tileDuration = tilesInfo.Interval / 1000m;
var infDuration = tileDuration * tilesPerGrid;
var tileGridCount = (int)Math.Ceiling((decimal)tilesInfo.TileCount / tilesPerGrid);
builder
.AppendLine("#EXTM3U")
.Append("#EXT-X-TARGETDURATION:")
.AppendLine(tileGridCount.ToString(CultureInfo.InvariantCulture))
.AppendLine("#EXT-X-VERSION:7")
.AppendLine("#EXT-X-MEDIA-SEQUENCE:1")
.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD")
.AppendLine("#EXT-X-IMAGES-ONLY");
for (int i = 0; i < tileGridCount; i++)
{
// All tile grids before the last one must contain full amount of tiles.
// The final grid will be 0 < count <= maxTiles
if (i == tileGridCount - 1)
{
tilesPerGrid = tilesInfo.TileCount - (i * tilesPerGrid);
infDuration = tileDuration * tilesPerGrid;
}
var url = string.Format(
CultureInfo.InvariantCulture,
urlFormat,
width.ToString(CultureInfo.InvariantCulture),
i.ToString(CultureInfo.InvariantCulture),
mediaSourceId.ToString("N"),
User.GetToken());
// EXTINF
builder
.Append("#EXTINF:")
.Append(string.Format(CultureInfo.InvariantCulture, decimalFormat, infDuration))
.AppendLine(",");
// EXT-X-TILES
builder
.Append("#EXT-X-TILES:RESOLUTION=")
.Append(resolution)
.Append(",LAYOUT=")
.Append(layout)
.Append(",DURATION=")
.AppendLine(string.Format(CultureInfo.InvariantCulture, decimalFormat, tileDuration));
// URL
builder.AppendLine(url);
}
builder.AppendLine("#EXT-X-ENDLIST");
return new FileContentResult(Encoding.UTF8.GetBytes(builder.ToString()), MimeTypes.GetMimeType("playlist.m3u8"));
}
}
return new FileContentResult(Array.Empty<byte>(), MimeTypes.GetMimeType("playlist.m3u8"));
}
}
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