internal Coder EncodeStart(PpmdProperties properties)
{
Allocator = properties.Allocator;
Coder = new Coder();
Coder.RangeEncoderInitialize();
StartModel(properties.ModelOrder, properties.ModelRestorationMethod);
return(Coder);
}
public ZipWriter(Stream destination, CompressionInfo compressionInfo, string zipComment) : base(ArchiveType.Zip)
{
this.ppmdProperties = new PpmdProperties();
this.entries = new List <ZipCentralDirectoryEntry>();
this.zipComment = zipComment ?? string.Empty;
this.zipCompressionInfo = new ZipCompressionInfo(compressionInfo);
base.InitalizeStream(destination, false);
}
internal Coder DecodeStart(Stream source, PpmdProperties properties)
{
Allocator = properties.Allocator;
Coder = new Coder();
Coder.RangeDecoderInitialize(source);
StartModel(properties.ModelOrder, properties.ModelRestorationMethod);
minimumContext = maximumContext;
numberStatistics = minimumContext.NumberStatistics;
return(Coder);
}
/// <summary>
/// Encode (ie. compress) a given source stream, writing the encoded result to the target stream.
/// </summary>
public void Encode(Stream target, Stream source, PpmdProperties properties)
{
if (target == null)
{
throw new ArgumentNullException("target");
}
if (source == null)
{
throw new ArgumentNullException("source");
}
EncodeStart(properties);
EncodeBlock(target, source, true);
}
public void Encode(Stream target, Stream source, PpmdProperties properties)
{
if (target is null)
{
throw new ArgumentNullException(nameof(target));
}
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
EncodeStart(properties);
EncodeBlock(target, source, true);
}
private readonly PpmdProperties ppmdProperties; // Caching properties to speed up PPMd.
#endif
public ZipWriter(Stream destination, CompressionInfo compressionInfo, string zipComment, Encoding encoding = null)
: base(ArchiveType.Zip)
{
this.zipComment = zipComment ?? string.Empty;
this.encoding = encoding ?? ArchiveEncoding.Default;
switch (compressionInfo.Type)
{
case CompressionType.None:
{
compression = ZipCompressionMethod.None;
}
break;
case CompressionType.Deflate:
{
compression = ZipCompressionMethod.Deflate;
deflateCompressionLevel = compressionInfo.DeflateCompressionLevel;
}
break;
case CompressionType.BZip2:
{
compression = ZipCompressionMethod.BZip2;
}
break;
#if LZMA
case CompressionType.LZMA:
{
compression = ZipCompressionMethod.LZMA;
}
break;
#endif
#if PPMd
case CompressionType.PPMd:
{
ppmdProperties = new PpmdProperties();
compression = ZipCompressionMethod.PPMd;
}
break;
#endif
default:
throw new InvalidFormatException("Invalid compression method: " + compressionInfo.Type);
}
InitalizeStream(destination, false);
}
public void Decode(Stream target, Stream source, PpmdProperties properties)
{
if (target is null)
{
throw new ArgumentNullException(nameof(target));
}
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
DecodeStart(source, properties);
byte[] buffer = new byte[65536];
int read;
while ((read = DecodeBlock(source, buffer, 0, buffer.Length)) != 0)
{
target.Write(buffer, 0, read);
}
}
internal Coder DecodeStart(Stream source, PpmdProperties properties)
{
Allocator = properties.Allocator;
Coder = new Coder();
Coder.RangeDecoderInitialize(source);
StartModel(properties.ModelOrder, properties.ModelRestorationMethod);
minimumContext = maximumContext;
numberStatistics = minimumContext.NumberStatistics;
return Coder;
}
/// <summary>
/// Dencode (ie. decompress) a given source stream, writing the decoded result to the target stream.
/// </summary>
public void Decode(Stream target, Stream source, PpmdProperties properties)
{
if (target == null)
throw new ArgumentNullException("target");
if (source == null)
throw new ArgumentNullException("source");
DecodeStart(source, properties);
byte[] buffer = new byte[65536];
int read;
while ((read = DecodeBlock(source, buffer, 0, buffer.Length)) != 0)
target.Write(buffer, 0, read);
return;
}
internal Coder EncodeStart(PpmdProperties properties)
{
Allocator = properties.Allocator;
Coder = new Coder();
Coder.RangeEncoderInitialize();
StartModel(properties.ModelOrder, properties.ModelRestorationMethod);
return Coder;
}
/// <summary>
/// Encode (ie. compress) a given source stream, writing the encoded result to the target stream.
/// </summary>
public void Encode(Stream target, Stream source, PpmdProperties properties)
{
if (target == null)
throw new ArgumentNullException("target");
if (source == null)
throw new ArgumentNullException("source");
EncodeStart(properties);
EncodeBlock(target, source, true);
}
