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solve 'edge' case and pass cancellation token

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Dennis Arfan 2025-08-01 22:13:13 +07:00
parent 0472bfe58e
commit d3dfdd6a74
15 changed files with 208 additions and 551 deletions
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55
Infra/Encoders/PngStreamEncoder.cs
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@ -1,5 +1,6 @@
using System.Buffers.Binary;
using System.IO.Compression;
using StitchATon2.Infra.Buffers;
namespace StitchATon2.Infra.Encoders;
@ -30,7 +31,7 @@ public class PngStreamEncoder : IDisposable, IAsyncDisposable
~PngStreamEncoder() => Dispose();
public async Task WriteHeader()
public async Task WriteHeader(CancellationToken cancellationToken = default)
{
byte[] headerBytes = [
0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, // PNG Signature
@ -54,34 +55,42 @@ public class PngStreamEncoder : IDisposable, IAsyncDisposable
BinaryPrimitives.WriteUInt32BigEndian(headerBytes.AsSpan(29), crc);
await _stream.WriteAsync(headerBytes);
await _stream.WriteAsync(headerBytes, cancellationToken);
}
public async Task WriteData(Memory<byte> data)
public async Task WriteDataAsync(IBuffer<byte> buffer, bool disposeBuffer = true, CancellationToken cancellationToken = default)
{
_zlibStream.Write([0]);
var dataSlice = data;
while (dataSlice.Length > FlushThreshold)
try
{
await _zlibStream.WriteAsync(dataSlice[..FlushThreshold]);
await _zlibStream.FlushAsync();
dataSlice = dataSlice[FlushThreshold..];
if(_memoryStream.Length >= BufferSize)
await Flush();
_zlibStream.Write([0]);
var dataSlice = buffer.Memory;
while (dataSlice.Length > FlushThreshold)
{
await _zlibStream.WriteAsync(dataSlice[..FlushThreshold], cancellationToken);
await _zlibStream.FlushAsync(cancellationToken);
dataSlice = dataSlice[FlushThreshold..];
if (_memoryStream.Length >= BufferSize)
await FlushAsync(cancellationToken);
}
if (dataSlice.Length > 0)
{
await _zlibStream.WriteAsync(dataSlice, cancellationToken);
await _zlibStream.FlushAsync(cancellationToken);
_shouldFlush = true;
}
}
if (dataSlice.Length > 0)
finally
{
await _zlibStream.WriteAsync(dataSlice);
await _zlibStream.FlushAsync();
_shouldFlush = true;
if(disposeBuffer)
buffer.Dispose();
}
}
private async Task Flush()
private async Task FlushAsync(CancellationToken cancellationToken)
{
await _zlibStream.FlushAsync();
await _zlibStream.FlushAsync(cancellationToken);
var dataSize = (int)(_memoryStream.Length - 8);
_memoryStream.Write("\0\0\0\0"u8);
@ -96,16 +105,16 @@ public class PngStreamEncoder : IDisposable, IAsyncDisposable
var crc = Crc32.Compute(buffer.AsSpan(4, dataSize + 4));
BinaryPrimitives.WriteUInt32BigEndian(buffer.AsSpan(dataSize + 8), crc);
await _stream.WriteAsync(buffer.AsMemory(0, dataSize + 12));
await _stream.WriteAsync(buffer.AsMemory(0, dataSize + 12), cancellationToken);
_memoryStream.SetLength(8);
_memoryStream.Position = 8;
_shouldFlush = false;
}
public async ValueTask WriteEndOfFile()
public async ValueTask WriteEndOfFileAsync(CancellationToken cancellationToken = default)
{
if(_shouldFlush)
await Flush();
await FlushAsync(cancellationToken);
var endChunk = new byte[] {
0x00, 0x00, 0x00, 0x00, // Length
@ -113,7 +122,7 @@ public class PngStreamEncoder : IDisposable, IAsyncDisposable
0xAE, 0x42, 0x60, 0x82, // Crc
};
await _stream.WriteAsync(endChunk);
await _stream.WriteAsync(endChunk, cancellationToken);
await DisposeAsync();
}