private static void SelectStream(
ArchiveMetadata archiveMetadata,
ArchiveDecoderSection sectionMetadata,
DecoderInputMetadata selector,
ReaderNode[] streams,
DecoderNode[] decoders,
out ReaderNode result,
out long length)
{
var decoderIndex = selector.DecoderIndex;
if (decoderIndex.HasValue)
{
length = sectionMetadata.Decoders[decoderIndex.Value].OutputStreams[selector.StreamIndex].Length;
result = decoders[decoderIndex.Value].GetOutputStream(selector.StreamIndex);
}
else
{
length = archiveMetadata.FileSections[selector.StreamIndex].Length;
result = streams[selector.StreamIndex];
}
}
public ArchiveSectionDecoder(Stream stream, ArchiveMetadata metadata, int index, PasswordStorage password)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream must be readable.", nameof(stream));
}
if (!stream.CanSeek)
{
throw new ArgumentException("Stream must be seekable.", nameof(stream));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
if (index < 0 || index >= metadata.DecoderSections.Length)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
var inputCoordinator = new StreamCoordinator(stream);
var inputStreams = new ReaderNode[metadata.FileSections.Length];
for (int i = 0; i < inputStreams.Length; i++)
{
inputStreams[i] = new CoordinatedStream(inputCoordinator, metadata.FileSections[i].Offset, metadata.FileSections[i].Length);
}
var decoderSection = metadata.DecoderSections[index];
var decoderDefinitions = decoderSection.Decoders;
var decoders = new DecoderNode[decoderDefinitions.Length];
for (int i = 0; i < decoders.Length; i++)
{
var decoderDefinition = decoderDefinitions[i];
decoders[i] = decoderDefinition.DecoderType.CreateDecoder(decoderDefinition.Settings, decoderDefinition.OutputStreams, password);
}
for (int i = 0; i < decoders.Length; i++)
{
var decoder = decoders[i];
var decoderDefinition = decoderDefinitions[i];
var decoderInputDefinitions = decoderDefinition.InputStreams;
for (int j = 0; j < decoderInputDefinitions.Length; j++)
{
ReaderNode inputStream;
long inputLength;
SelectStream(metadata, decoderSection, decoderInputDefinitions[j], inputStreams, decoders, out inputStream, out inputLength);
decoder.SetInputStream(j, inputStream, inputLength);
}
}
ReaderNode outputStream;
long outputLength;
SelectStream(metadata, decoderSection, decoderSection.DecodedStream, inputStreams, decoders, out outputStream, out outputLength);
mCoordinator = inputCoordinator;
mInputStreams = inputStreams;
mDecoders = decoders;
mOutputStream = outputStream;
}
public ArchiveSectionDecoder(Stream stream, ArchiveMetadata metadata, int index, PasswordStorage password)
{
if (stream == null)
throw new ArgumentNullException(nameof(stream));
if (!stream.CanRead)
throw new ArgumentException("Stream must be readable.", nameof(stream));
if (!stream.CanSeek)
throw new ArgumentException("Stream must be seekable.", nameof(stream));
if (metadata == null)
throw new ArgumentNullException(nameof(metadata));
if (index < 0 || index >= metadata.DecoderSections.Length)
throw new ArgumentOutOfRangeException(nameof(index));
var inputCoordinator = new StreamCoordinator(stream);
var inputStreams = new ReaderNode[metadata.FileSections.Length];
for (int i = 0; i < inputStreams.Length; i++)
inputStreams[i] = new CoordinatedStream(inputCoordinator, metadata.FileSections[i].Offset, metadata.FileSections[i].Length);
var decoderSection = metadata.DecoderSections[index];
var decoderDefinitions = decoderSection.Decoders;
var decoders = new DecoderNode[decoderDefinitions.Length];
for (int i = 0; i < decoders.Length; i++)
{
var decoderDefinition = decoderDefinitions[i];
decoders[i] = decoderDefinition.DecoderType.CreateDecoder(decoderDefinition.Settings, decoderDefinition.OutputStreams, password);
}
for (int i = 0; i < decoders.Length; i++)
{
var decoder = decoders[i];
var decoderDefinition = decoderDefinitions[i];
var decoderInputDefinitions = decoderDefinition.InputStreams;
for (int j = 0; j < decoderInputDefinitions.Length; j++)
{
ReaderNode inputStream;
long inputLength;
SelectStream(metadata, decoderSection, decoderInputDefinitions[j], inputStreams, decoders, out inputStream, out inputLength);
decoder.SetInputStream(j, inputStream, inputLength);
}
}
ReaderNode outputStream;
long outputLength;
SelectStream(metadata, decoderSection, decoderSection.DecodedStream, inputStreams, decoders, out outputStream, out outputLength);
mCoordinator = inputCoordinator;
mInputStreams = inputStreams;
mDecoders = decoders;
mOutputStream = outputStream;
}