public void TestTwoItems()
{
FingerprintCompressor compressor = new FingerprintCompressor();
int[] fingerprint = { 1, 0 };
string value = compressor.Compress(fingerprint);
byte[] expected = { 0, 0, 0, 2, 65, 0 };
byte[] actual = Base64.ByteEncoding.GetBytes(value);
CollectionAssert.AreEqual(actual, expected);
}
public void TestOneItemOneBitExcept2()
{
FingerprintCompressor compressor = new FingerprintCompressor();
int[] fingerprint = { 1 << 8 };
string value = compressor.Compress(fingerprint);
byte[] expected = { 0, 0, 0, 1, 7, 2 };
byte[] actual = Base64.ByteEncoding.GetBytes(value);
CollectionAssert.AreEqual(actual, expected);
}
/// <summary>
/// Compress and optionally base64-encode a raw fingerprint.
/// </summary>
/// <param name="fp">pointer to an array of 32-bit integers representing the raw fingerprint to be encoded</param>
/// <param name="algorithm">Chromaprint algorithm version which was used to generate the raw fingerprint</param>
/// <param name="base64">Whether to return binary data or base64-encoded ASCII data. The
/// compressed fingerprint will be encoded using base64 with the URL-safe scheme if you
/// set this parameter to 1. It will return binary data if it's 0.</param>
/// <returns>The encoded fingerprint</returns>
public static byte[] EncodeFingerprint(int[] fp, int algorithm, bool base64)
{
FingerprintCompressor compressor = new FingerprintCompressor();
string compressed = compressor.Compress(fp, algorithm);
if (!base64)
{
return Base64.ByteEncoding.GetBytes(compressed);
}
return Base64.ByteEncoding.GetBytes(Base64.Encode(compressed));
}
/// <summary>
/// Return the calculated fingerprint as a compressed string.
/// </summary>
/// <returns>The fingerprint as a compressed string</returns>
public string GetFingerprint()
{
FingerprintCompressor compressor = new FingerprintCompressor();
return Base64.Encode(compressor.Compress(this.fingerprint, algorithm));
}
