public static byte[] RunLengthEncodeByteArray(
byte[] uncompressed,
eEncodeType encodeType,
byte[] header)
{
List<byte> compressed = new List<byte>();
byte encodeValue = (encodeType == eEncodeType.Zeros) ? (byte)0 : (byte)255;
int readIndex = 0;
// Add header bytes, uncompressed
if (header != null && header.Length > 0)
{
foreach (byte headerByte in header)
{
compressed.Add(headerByte);
}
}
// Apply RLE compression on the rest of the buffer
while (readIndex < uncompressed.Length)
{
byte uncompressedByte = uncompressed[readIndex++];
compressed.Add(uncompressedByte);
if (uncompressedByte == encodeValue)
{
byte encodeByteRunCount = 0;
while (readIndex < uncompressed.Length && uncompressed[readIndex] == encodeValue && encodeByteRunCount < 255)
{
encodeByteRunCount++;
readIndex++;
}
compressed.Add(encodeByteRunCount);
}
}
return compressed.ToArray();
}
public static byte[] RunLengthEncodeByteArray(
byte[] uncompressed,
eEncodeType encodeType,
byte[] header)
{
List <byte> compressed = new List <byte>();
byte encodeValue = (encodeType == eEncodeType.Zeros) ? (byte)0 : (byte)255;
int readIndex = 0;
// Add header bytes, uncompressed
if (header != null && header.Length > 0)
{
foreach (byte headerByte in header)
{
compressed.Add(headerByte);
}
}
// Apply RLE compression on the rest of the buffer
while (readIndex < uncompressed.Length)
{
byte uncompressedByte = uncompressed[readIndex++];
compressed.Add(uncompressedByte);
if (uncompressedByte == encodeValue)
{
byte encodeByteRunCount = 0;
while (readIndex < uncompressed.Length && uncompressed[readIndex] == encodeValue && encodeByteRunCount < 255)
{
encodeByteRunCount++;
readIndex++;
}
compressed.Add(encodeByteRunCount);
}
}
return(compressed.ToArray());
}
public static byte[] RunLengthDecodeByteArray(
byte[] compressed,
eEncodeType encodeType,
byte[] header)
{
List<byte> uncompressed = new List<byte>();
byte encodeValue = (encodeType == eEncodeType.Zeros) ? (byte)0 : (byte)255;
int readIndex = 0;
// Extract the uncompressed header first
while (header != null && readIndex < header.Length)
{
header[readIndex] = compressed[readIndex];
readIndex++;
}
// Decompress the rest of the buffer
while (readIndex < compressed.Length)
{
if (compressed[readIndex] != encodeValue)
{
uncompressed.Add(compressed[readIndex++]);
}
else
{
for (int encodeBytesLeft = compressed[readIndex + 1] + 1; encodeBytesLeft != 0; encodeBytesLeft--)
{
uncompressed.Add(encodeValue);
}
readIndex += 2;
}
}
return uncompressed.ToArray();
}
public static byte[] RunLengthDecodeByteArray(
byte[] compressed,
eEncodeType encodeType,
byte[] header)
{
List <byte> uncompressed = new List <byte>();
byte encodeValue = (encodeType == eEncodeType.Zeros) ? (byte)0 : (byte)255;
int readIndex = 0;
// Extract the uncompressed header first
while (header != null && readIndex < header.Length)
{
header[readIndex] = compressed[readIndex];
readIndex++;
}
// Decompress the rest of the buffer
while (readIndex < compressed.Length)
{
if (compressed[readIndex] != encodeValue)
{
uncompressed.Add(compressed[readIndex++]);
}
else
{
for (int encodeBytesLeft = compressed[readIndex + 1] + 1; encodeBytesLeft != 0; encodeBytesLeft--)
{
uncompressed.Add(encodeValue);
}
readIndex += 2;
}
}
return(uncompressed.ToArray());
}
