mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-06 22:07:13 -04:00
164 lines
5.4 KiB
C#
164 lines
5.4 KiB
C#
using System;
|
|
using System.Diagnostics;
|
|
using System.IO;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
using Jellyfin.Api.Models.PlaybackDtos;
|
|
using MediaBrowser.Model.IO;
|
|
|
|
namespace Jellyfin.Api.Helpers
|
|
{
|
|
/// <summary>
|
|
/// A progressive file stream for transferring transcoded files as they are written to.
|
|
/// </summary>
|
|
public class ProgressiveFileStream : Stream
|
|
{
|
|
private readonly Stream _stream;
|
|
private readonly TranscodingJobDto? _job;
|
|
private readonly TranscodingJobHelper? _transcodingJobHelper;
|
|
private readonly int _timeoutMs;
|
|
private int _bytesWritten;
|
|
private bool _disposed;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ProgressiveFileStream"/> class.
|
|
/// </summary>
|
|
/// <param name="filePath">The path to the transcoded file.</param>
|
|
/// <param name="job">The transcoding job information.</param>
|
|
/// <param name="transcodingJobHelper">The transcoding job helper.</param>
|
|
/// <param name="timeoutMs">The timeout duration in milliseconds.</param>
|
|
public ProgressiveFileStream(string filePath, TranscodingJobDto? job, TranscodingJobHelper transcodingJobHelper, int timeoutMs = 30000)
|
|
{
|
|
_job = job;
|
|
_transcodingJobHelper = transcodingJobHelper;
|
|
_timeoutMs = timeoutMs;
|
|
|
|
_stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous | FileOptions.SequentialScan);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ProgressiveFileStream"/> class.
|
|
/// </summary>
|
|
/// <param name="stream">The stream to progressively copy.</param>
|
|
/// <param name="timeoutMs">The timeout duration in milliseconds.</param>
|
|
public ProgressiveFileStream(Stream stream, int timeoutMs = 30000)
|
|
{
|
|
_job = null;
|
|
_transcodingJobHelper = null;
|
|
_timeoutMs = timeoutMs;
|
|
_stream = stream;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override bool CanRead => _stream.CanRead;
|
|
|
|
/// <inheritdoc />
|
|
public override bool CanSeek => false;
|
|
|
|
/// <inheritdoc />
|
|
public override bool CanWrite => false;
|
|
|
|
/// <inheritdoc />
|
|
public override long Length => throw new NotSupportedException();
|
|
|
|
/// <inheritdoc />
|
|
public override long Position
|
|
{
|
|
get => throw new NotSupportedException();
|
|
set => throw new NotSupportedException();
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override void Flush()
|
|
{
|
|
_stream.Flush();
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override int Read(byte[] buffer, int offset, int count)
|
|
{
|
|
return _stream.Read(buffer, offset, count);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
|
|
{
|
|
int totalBytesRead = 0;
|
|
int remainingBytesToRead = count;
|
|
var stopwatch = Stopwatch.StartNew();
|
|
|
|
int newOffset = offset;
|
|
while (remainingBytesToRead > 0)
|
|
{
|
|
cancellationToken.ThrowIfCancellationRequested();
|
|
int bytesRead = await _stream.ReadAsync(buffer, newOffset, remainingBytesToRead, cancellationToken).ConfigureAwait(false);
|
|
|
|
remainingBytesToRead -= bytesRead;
|
|
newOffset += bytesRead;
|
|
|
|
if (bytesRead > 0)
|
|
{
|
|
_bytesWritten += bytesRead;
|
|
totalBytesRead += bytesRead;
|
|
|
|
if (_job != null)
|
|
{
|
|
_job.BytesDownloaded = Math.Max(_job.BytesDownloaded ?? _bytesWritten, _bytesWritten);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If the job is null it's a live stream and will require user action to close, but don't keep it open indefinitely
|
|
if (_job?.HasExited ?? stopwatch.ElapsedMilliseconds > _timeoutMs)
|
|
{
|
|
break;
|
|
}
|
|
|
|
await Task.Delay(50, cancellationToken).ConfigureAwait(false);
|
|
}
|
|
}
|
|
|
|
return totalBytesRead;
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
public override long Seek(long offset, SeekOrigin origin)
|
|
=> throw new NotSupportedException();
|
|
|
|
/// <inheritdoc />
|
|
public override void SetLength(long value)
|
|
=> throw new NotSupportedException();
|
|
|
|
/// <inheritdoc />
|
|
public override void Write(byte[] buffer, int offset, int count)
|
|
=> throw new NotSupportedException();
|
|
|
|
/// <inheritdoc />
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
if (_disposed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
try
|
|
{
|
|
if (disposing)
|
|
{
|
|
_stream.Dispose();
|
|
|
|
if (_job != null)
|
|
{
|
|
_transcodingJobHelper?.OnTranscodeEndRequest(_job);
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
_disposed = true;
|
|
base.Dispose(disposing);
|
|
}
|
|
}
|
|
}
|
|
}
|