private async Task <string> 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
{
if (File.Exists(path))
{
return(path);
}
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 async Task<string> 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
{
if (File.Exists(path))
{
return path;
}
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();
}
}
public object Get(GetBifFile request)
{
return(ToStaticFileResult(GetBifFile(request).Result));
}
public object Get(GetBifFile request)
{
return ToStaticFileResult(GetBifFile(request).Result);
}
