You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
183 lines
6.9 KiB
183 lines
6.9 KiB
using System;
|
|
using System.Buffers;
|
|
using System.IO;
|
|
using System.Runtime.InteropServices;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
using Jellyfin.Api.Models.PlaybackDtos;
|
|
using MediaBrowser.Controller.Library;
|
|
using MediaBrowser.Model.IO;
|
|
|
|
namespace Jellyfin.Api.Helpers
|
|
{
|
|
/// <summary>
|
|
/// Progressive file copier.
|
|
/// </summary>
|
|
public class ProgressiveFileCopier
|
|
{
|
|
private readonly TranscodingJobDto? _job;
|
|
private readonly string? _path;
|
|
private readonly CancellationToken _cancellationToken;
|
|
private readonly IDirectStreamProvider? _directStreamProvider;
|
|
private readonly TranscodingJobHelper _transcodingJobHelper;
|
|
private long _bytesWritten;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ProgressiveFileCopier"/> class.
|
|
/// </summary>
|
|
/// <param name="path">The path to copy from.</param>
|
|
/// <param name="job">The transcoding job.</param>
|
|
/// <param name="transcodingJobHelper">Instance of the <see cref="TranscodingJobHelper"/>.</param>
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|
public ProgressiveFileCopier(string path, TranscodingJobDto? job, TranscodingJobHelper transcodingJobHelper, CancellationToken cancellationToken)
|
|
{
|
|
_path = path;
|
|
_job = job;
|
|
_cancellationToken = cancellationToken;
|
|
_transcodingJobHelper = transcodingJobHelper;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ProgressiveFileCopier"/> class.
|
|
/// </summary>
|
|
/// <param name="directStreamProvider">Instance of the <see cref="IDirectStreamProvider"/> interface.</param>
|
|
/// <param name="job">The transcoding job.</param>
|
|
/// <param name="transcodingJobHelper">Instance of the <see cref="TranscodingJobHelper"/>.</param>
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|
public ProgressiveFileCopier(IDirectStreamProvider directStreamProvider, TranscodingJobDto? job, TranscodingJobHelper transcodingJobHelper, CancellationToken cancellationToken)
|
|
{
|
|
_directStreamProvider = directStreamProvider;
|
|
_job = job;
|
|
_cancellationToken = cancellationToken;
|
|
_transcodingJobHelper = transcodingJobHelper;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets or sets a value indicating whether allow read end of file.
|
|
/// </summary>
|
|
public bool AllowEndOfFile { get; set; } = true;
|
|
|
|
/// <summary>
|
|
/// Gets or sets copy start position.
|
|
/// </summary>
|
|
public long StartPosition { get; set; }
|
|
|
|
/// <summary>
|
|
/// Write source stream to output.
|
|
/// </summary>
|
|
/// <param name="outputStream">Output stream.</param>
|
|
/// <param name="cancellationToken">Cancellation token.</param>
|
|
/// <returns>A <see cref="Task"/>.</returns>
|
|
public async Task WriteToAsync(Stream outputStream, CancellationToken cancellationToken)
|
|
{
|
|
cancellationToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, _cancellationToken).Token;
|
|
|
|
try
|
|
{
|
|
if (_directStreamProvider != null)
|
|
{
|
|
await _directStreamProvider.CopyToAsync(outputStream, cancellationToken).ConfigureAwait(false);
|
|
return;
|
|
}
|
|
|
|
var fileOptions = FileOptions.SequentialScan;
|
|
var allowAsyncFileRead = false;
|
|
|
|
// use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
|
|
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
|
|
{
|
|
fileOptions |= FileOptions.Asynchronous;
|
|
allowAsyncFileRead = true;
|
|
}
|
|
|
|
await using var inputStream = new FileStream(_path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, IODefaults.FileStreamBufferSize, fileOptions);
|
|
|
|
var eofCount = 0;
|
|
const int EmptyReadLimit = 20;
|
|
if (StartPosition > 0)
|
|
{
|
|
inputStream.Position = StartPosition;
|
|
}
|
|
|
|
while (eofCount < EmptyReadLimit || !AllowEndOfFile)
|
|
{
|
|
var bytesRead = await CopyToInternalAsync(inputStream, outputStream, allowAsyncFileRead, cancellationToken).ConfigureAwait(false);
|
|
|
|
if (bytesRead == 0)
|
|
{
|
|
if (_job == null || _job.HasExited)
|
|
{
|
|
eofCount++;
|
|
}
|
|
|
|
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
|
|
}
|
|
else
|
|
{
|
|
eofCount = 0;
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
if (_job != null)
|
|
{
|
|
_transcodingJobHelper.OnTranscodeEndRequest(_job);
|
|
}
|
|
}
|
|
}
|
|
|
|
private async Task<int> CopyToInternalAsync(Stream source, Stream destination, bool readAsync, CancellationToken cancellationToken)
|
|
{
|
|
var array = ArrayPool<byte>.Shared.Rent(IODefaults.CopyToBufferSize);
|
|
try
|
|
{
|
|
int bytesRead;
|
|
int totalBytesRead = 0;
|
|
|
|
if (readAsync)
|
|
{
|
|
bytesRead = await source.ReadAsync(array, 0, array.Length, cancellationToken).ConfigureAwait(false);
|
|
}
|
|
else
|
|
{
|
|
bytesRead = source.Read(array, 0, array.Length);
|
|
}
|
|
|
|
while (bytesRead != 0)
|
|
{
|
|
var bytesToWrite = bytesRead;
|
|
|
|
if (bytesToWrite > 0)
|
|
{
|
|
await destination.WriteAsync(array, 0, Convert.ToInt32(bytesToWrite), cancellationToken).ConfigureAwait(false);
|
|
|
|
_bytesWritten += bytesRead;
|
|
totalBytesRead += bytesRead;
|
|
|
|
if (_job != null)
|
|
{
|
|
_job.BytesDownloaded = Math.Max(_job.BytesDownloaded ?? _bytesWritten, _bytesWritten);
|
|
}
|
|
}
|
|
|
|
if (readAsync)
|
|
{
|
|
bytesRead = await source.ReadAsync(array, 0, array.Length, cancellationToken).ConfigureAwait(false);
|
|
}
|
|
else
|
|
{
|
|
bytesRead = source.Read(array, 0, array.Length);
|
|
}
|
|
}
|
|
|
|
return totalBytesRead;
|
|
}
|
|
finally
|
|
{
|
|
ArrayPool<byte>.Shared.Return(array);
|
|
}
|
|
}
|
|
}
|
|
}
|