private static string GetErrorMessage(JpegLSError result)
{
var message = Environment.Is64BitProcess ?
SafeNativeMethods.CharLSGetErrorMessageX64((int)result) :
SafeNativeMethods.CharLSGetErrorMessageX86((int)result);
return(Marshal.PtrToStringAnsi(message));
}
private static void JpegLsReadHeaderThrowWhenError(byte[] source, int length, out JlsParameters info)
{
Contract.Requires(source != null);
var errorMessage = new StringBuilder(256);
JpegLSError result = Is64BitProcess ?
SafeNativeMethods.JpegLsReadHeader64(source, length, out info, errorMessage) :
SafeNativeMethods.JpegLsReadHeader(source, length, out info, errorMessage);
HandleResult(result, errorMessage);
}
private static void HandleResult(JpegLSError result, StringBuilder errorMessage)
{
Exception exception;
switch (result)
{
case JpegLSError.None:
return;
case JpegLSError.TooMuchCompressedData:
case JpegLSError.InvalidJlsParameters:
case JpegLSError.InvalidCompressedData:
case JpegLSError.CompressedBufferTooSmall:
case JpegLSError.ImageTypeNotSupported:
case JpegLSError.UnsupportedBitDepthForTransform:
case JpegLSError.UnsupportedColorTransform:
case JpegLSError.UnsupportedEncoding:
case JpegLSError.UnknownJpegMarker:
case JpegLSError.MissingJpegMarkerStart:
case JpegLSError.UnspecifiedFailure:
exception = new InvalidDataException(errorMessage.ToString());
break;
case JpegLSError.UncompressedBufferTooSmall:
case JpegLSError.ParameterValueNotSupported:
exception = new ArgumentException(errorMessage.ToString());
break;
case JpegLSError.UnexpectedFailure:
exception = new InvalidOperationException("Unexpected failure. The state of the implementation may be invalid.");
break;
default:
exception = new NotImplementedException(string.Format(CultureInfo.InvariantCulture,
"The native codec has returned an unexpected result value: {0}", result));
break;
}
var data = exception.Data;
Contract.Assume(data != null);
// ReSharper disable once PossibleNullReferenceException
data.Add("JpegLSError", result);
throw exception;
}
/// <summary>
/// Decompresses the JPEG-LS encoded data passed in the source byte array into the destination array.
/// </summary>
/// <param name="source">The byte array that contains the JPEG-LS encoded data to decompress.</param>
/// <param name="count">The number of bytes of the array to decompress.</param>
/// <param name="pixels">The byte array that will hold the pixels when the function returns.</param>
/// <exception cref="ArgumentNullException">source -or- pixels is null.</exception>
/// <exception cref="ArgumentOutOfRangeException">count contains an invalid value.</exception>
/// <exception cref="ArgumentException">Thrown when the destination array is too small to hold the decompressed pixel data.</exception>
/// <exception cref="InvalidDataException">Thrown when the source array contains an invalid encodeded JPEG-LS bit stream.</exception>
public static void Decompress(byte[] source, int count, byte[] pixels)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (count < 0 || count > source.Length)
{
throw new ArgumentOutOfRangeException(nameof(count), "count < 0 || count > source.Length");
}
if (pixels == null)
{
throw new ArgumentNullException(nameof(pixels));
}
Contract.EndContractBlock();
var errorMessage = new StringBuilder(256);
JpegLSError error = Is64BitProcess ?
SafeNativeMethods.JpegLsDecode64(pixels, pixels.Length, source, count, IntPtr.Zero, errorMessage) :
SafeNativeMethods.JpegLsDecode(pixels, pixels.Length, source, count, IntPtr.Zero, errorMessage);
HandleResult(error, errorMessage);
}
private static string GetErrorMessage(JpegLSError error)
{
IntPtr message = CharLSGetErrorMessage((int)error);
return(Marshal.PtrToStringAnsi(message) ?? string.Empty);
}
internal static void HandleJpegLSError(JpegLSError error)
{
Exception exception;
switch (error)
{
case JpegLSError.None:
return;
case JpegLSError.TooMuchEncodedData:
case JpegLSError.ParameterValueNotSupported:
case JpegLSError.InvalidEncodedData:
case JpegLSError.SourceBufferTooSmall:
case JpegLSError.BitDepthForTransformNotSupported:
case JpegLSError.ColorTransformNotSupported:
case JpegLSError.EncodingNotSupported:
case JpegLSError.UnknownJpegMarkerFound:
case JpegLSError.JpegMarkerStartByteNotFound:
case JpegLSError.StartOfImageMarkerNotFound:
case JpegLSError.StartOfFrameMarkerNotFound:
case JpegLSError.InvalidMarkerSegmentSize:
case JpegLSError.DuplicateStartOfImageMarker:
case JpegLSError.DuplicateStartOfFrameMarker:
case JpegLSError.DuplicateComponentIdInStartOfFrameSegment:
case JpegLSError.UnexpectedEndOfImageMarker:
case JpegLSError.InvalidJpegLSPresetParameterType:
case JpegLSError.JpeglsPresetExtendedParameterTypeNotSupported:
case JpegLSError.MissingEndOfSpiffDirectory:
case JpegLSError.InvalidParameterWidth:
case JpegLSError.InvalidParameterHeight:
case JpegLSError.InvalidParameterComponentCount:
case JpegLSError.InvalidParameterBitsPerSample:
case JpegLSError.InvalidParameterInterleaveMode:
case JpegLSError.UnexpectedFailure:
case JpegLSError.NotEnoughMemory:
exception = new InvalidDataException(GetErrorMessage(error));
break;
case JpegLSError.InvalidArgument:
case JpegLSError.DestinationBufferTooSmall:
exception = new ArgumentException(GetErrorMessage(error));
break;
case JpegLSError.InvalidArgumentWidth:
case JpegLSError.InvalidArgumentHeight:
case JpegLSError.InvalidArgumentComponentCount:
case JpegLSError.InvalidArgumentBitsPerSample:
case JpegLSError.InvalidArgumentInterleaveMode:
case JpegLSError.InvalidArgumentNearLossless:
case JpegLSError.InvalidArgumentPresetCodingParameters:
case JpegLSError.InvalidArgumentSpiffEntrySize:
case JpegLSError.InvalidArgumentColorTransformation:
exception = new ArgumentOutOfRangeException(GetErrorMessage(error));
break;
case JpegLSError.InvalidOperation:
exception = new InvalidOperationException(GetErrorMessage(error));
break;
default:
Debug.Assert(false, "C# and native implementation mismatch");
// ReSharper disable once HeuristicUnreachableCode
exception = new InvalidOperationException(GetErrorMessage(error));
break;
}
exception.Data.Add(nameof(JpegLSError), error);
throw exception;
}
private static void HandleResult(JpegLSError result, StringBuilder errorMessage)
{
Exception exception;
switch (result)
{
case JpegLSError.None:
return;
case JpegLSError.TooMuchCompressedData:
case JpegLSError.InvalidJlsParameters:
case JpegLSError.InvalidCompressedData:
case JpegLSError.CompressedBufferTooSmall:
case JpegLSError.ImageTypeNotSupported:
case JpegLSError.UnsupportedBitDepthForTransform:
case JpegLSError.UnsupportedColorTransform:
case JpegLSError.UnsupportedEncoding:
case JpegLSError.UnknownJpegMarker:
case JpegLSError.MissingJpegMarkerStart:
case JpegLSError.UnspecifiedFailure:
exception = new InvalidDataException(errorMessage.ToString());
break;
case JpegLSError.UncompressedBufferTooSmall:
case JpegLSError.ParameterValueNotSupported:
exception = new ArgumentException(errorMessage.ToString());
break;
case JpegLSError.UnexpectedFailure:
exception = new InvalidOperationException("Unexpected failure. The state of the implementation may be invalid.");
break;
default:
exception = new NotImplementedException(string.Format(CultureInfo.InvariantCulture,
"The native codec has returned an unexpected result value: {0}", result));
break;
}
var data = exception.Data;
Contract.Assume(data != null);
data.Add("JpegLSError", result);
throw exception;
}
private static void HandleResult(JpegLSError result)
{
Exception exception;
switch (result)
{
case JpegLSError.None:
return;
case JpegLSError.TooMuchEncodedData:
case JpegLSError.ParameterValueNotSupported:
case JpegLSError.InvalidEncodedData:
case JpegLSError.SourceBufferTooSmall:
case JpegLSError.BitDepthForTransformNotSupported:
case JpegLSError.ColorTransformNotSupported:
case JpegLSError.EncodingNotSupported:
case JpegLSError.UnknownJpegMarkerFound:
case JpegLSError.JpegMarkerStartByteNotFound:
case JpegLSError.StartOfImageMarkerNotFound:
case JpegLSError.StartOfFrameMarkerNotFound:
case JpegLSError.InvalidMarkerSegmentSize:
case JpegLSError.DuplicateStartOfImageMarker:
case JpegLSError.DuplicateStartOfFrameMarker:
case JpegLSError.DuplicateComponentIdInStartOfFrameSegment:
case JpegLSError.UnexpectedEndOfImageMarker:
case JpegLSError.InvalidJpeglsPresetParameterType:
case JpegLSError.JpeglsPresetExtendedParameterTypeNotSupported:
case JpegLSError.InvalidParameterWidth:
case JpegLSError.InvalidParameterHeight:
case JpegLSError.InvalidParameterComponentCount:
case JpegLSError.InvalidParameterBitsPerSample:
case JpegLSError.InvalidParameterInterleaveMode:
exception = new InvalidDataException(GetErrorMessage(result));
break;
case JpegLSError.InvalidArgument:
case JpegLSError.DestinationBufferTooSmall:
case JpegLSError.InvalidArgumentWidth:
case JpegLSError.InvalidArgumentHeight:
case JpegLSError.InvalidArgumentComponentCount:
case JpegLSError.InvalidArgumentBitsPerSample:
case JpegLSError.InvalidArgumentInterleaveMode:
case JpegLSError.InvalidArgumentDestination:
case JpegLSError.InvalidArgumentSource:
case JpegLSError.InvalidArgumentThumbnail:
exception = new ArgumentException(GetErrorMessage(result));
break;
case JpegLSError.UnexpectedFailure:
exception = new InvalidOperationException(GetErrorMessage(result));
break;
default:
Debug.Assert(false, "C# and native implementation mismatch");
// ReSharper disable once HeuristicUnreachableCode
exception = new InvalidOperationException(GetErrorMessage(result));
break;
}
var data = exception.Data;
// ReSharper disable once PossibleNullReferenceException
data.Add(nameof(JpegLSError), result);
throw exception;
}
