diff --git a/MediaBrowser.Api/Playback/BifService.cs b/MediaBrowser.Api/Playback/BifService.cs new file mode 100644 index 000000000..7a3a7d32d --- /dev/null +++ b/MediaBrowser.Api/Playback/BifService.cs @@ -0,0 +1,181 @@ +using MediaBrowser.Common.IO; +using MediaBrowser.Controller; +using MediaBrowser.Controller.Entities; +using MediaBrowser.Controller.Library; +using MediaBrowser.Controller.MediaEncoding; +using ServiceStack; +using System; +using System.Collections.Concurrent; +using System.Globalization; +using System.IO; +using System.Linq; +using System.Threading; +using System.Threading.Tasks; + +namespace MediaBrowser.Api.Playback +{ + [Route("/Videos/{Id}/index.bif", "GET")] + public class GetBifFile + { + [ApiMember(Name = "MediaSourceId", Description = "The media version id, if playing an alternate version", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")] + public string MediaSourceId { get; set; } + + [ApiMember(Name = "MaxWidth", Description = "Optional. The maximum horizontal resolution of the encoded video.", IsRequired = false, DataType = "int", ParameterType = "query", Verb = "GET")] + public int? MaxWidth { get; set; } + + [ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")] + public string Id { get; set; } + } + + public class BifService : BaseApiService + { + private readonly IServerApplicationPaths _appPaths; + private readonly ILibraryManager _libraryManager; + private readonly IMediaEncoder _mediaEncoder; + private readonly IFileSystem _fileSystem; + + public BifService(IServerApplicationPaths appPaths, ILibraryManager libraryManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem) + { + _appPaths = appPaths; + _libraryManager = libraryManager; + _mediaEncoder = mediaEncoder; + _fileSystem = fileSystem; + } + + public object Get(GetBifFile request) + { + return ToStaticFileResult(GetBifFile(request).Result); + } + + private async Task GetBifFile(GetBifFile request) + { + var widthVal = request.MaxWidth.HasValue ? request.MaxWidth.Value.ToString(CultureInfo.InvariantCulture) : string.Empty; + + var item = _libraryManager.GetItemById(request.Id); + var mediaSources = ((IHasMediaSources)item).GetMediaSources(false).ToList(); + var mediaSource = mediaSources.FirstOrDefault(i => string.Equals(i.Id, request.MediaSourceId)) ?? mediaSources.First(); + + var path = Path.Combine(_appPaths.ImageCachePath, "bif", request.Id, request.MediaSourceId, widthVal, "index.bif"); + + if (File.Exists(path)) + { + return path; + } + + var protocol = mediaSource.Protocol; + + var inputPath = MediaEncoderHelpers.GetInputArgument(mediaSource.Path, protocol, null, mediaSource.PlayableStreamFileNames); + + var semaphore = GetLock(path); + + await semaphore.WaitAsync().ConfigureAwait(false); + + try + { + await _mediaEncoder.ExtractVideoImagesOnInterval(inputPath, protocol, mediaSource.Video3DFormat, + TimeSpan.FromSeconds(10), Path.GetDirectoryName(path), "img_", request.MaxWidth, CancellationToken.None) + .ConfigureAwait(false); + + var images = new DirectoryInfo(Path.GetDirectoryName(path)) + .EnumerateFiles() + .Where(img => string.Equals(img.Extension, ".jpg", StringComparison.Ordinal)) + .OrderBy(i => i.FullName) + .ToList(); + + using (var fs = _fileSystem.GetFileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read, true)) + { + var magicNumber = new byte[] { 0x89, 0x42, 0x49, 0x46, 0x0d, 0x0a, 0x1a, 0x0a }; + await fs.WriteAsync(magicNumber, 0, magicNumber.Length); + + // version + var bytes = GetBytes(0); + await fs.WriteAsync(bytes, 0, bytes.Length); + + // image count + bytes = GetBytes(images.Count); + await fs.WriteAsync(bytes, 0, bytes.Length); + + // interval in ms + bytes = GetBytes(10000); + await fs.WriteAsync(bytes, 0, bytes.Length); + + // reserved + for (var i = 20; i <= 63; i++) + { + bytes = new byte[] { 0x00 }; + await fs.WriteAsync(bytes, 0, bytes.Length); + } + + // write the bif index + var index = 0; + long imageOffset = 64 + (8 * images.Count) + 8; + + foreach (var img in images) + { + bytes = GetBytes(index); + await fs.WriteAsync(bytes, 0, bytes.Length); + + bytes = GetBytes(imageOffset); + await fs.WriteAsync(bytes, 0, bytes.Length); + + imageOffset += img.Length; + + index++; + } + + bytes = new byte[] { 0xff, 0xff, 0xff, 0xff }; + await fs.WriteAsync(bytes, 0, bytes.Length); + + bytes = GetBytes(imageOffset); + await fs.WriteAsync(bytes, 0, bytes.Length); + + // write the images + foreach (var img in images) + { + using (var imgStream = _fileSystem.GetFileStream(img.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, true)) + { + await imgStream.CopyToAsync(fs).ConfigureAwait(false); + } + } + } + + return path; + } + finally + { + semaphore.Release(); + } + } + + private byte[] GetBytes(int value) + { + byte[] bytes = BitConverter.GetBytes(value); + if (BitConverter.IsLittleEndian) + Array.Reverse(bytes); + return bytes; + } + + private byte[] GetBytes(long value) + { + var intVal = Convert.ToInt32(value); + return GetBytes(intVal); + + //byte[] bytes = BitConverter.GetBytes(value); + //if (BitConverter.IsLittleEndian) + // Array.Reverse(bytes); + //return bytes; + } + + private static readonly ConcurrentDictionary SemaphoreLocks = new ConcurrentDictionary(); + + /// + /// Gets the lock. + /// + /// The filename. + /// System.Object. + private static SemaphoreSlim GetLock(string filename) + { + return SemaphoreLocks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1)); + } + } +}