protected override void SetupWriter(AudioData audio)
{
var encodingConfig = new CriHcaParameters
{
Progress = Configuration.Progress,
Bitrate = Configuration.Bitrate,
LimitBitrate = Configuration.LimitBitrate
};
if (Configuration.Quality != CriHcaQuality.NotSet)
{
encodingConfig.Quality = Configuration.Quality;
}
var hcaFormat = audio.GetFormat <CriHcaFormat>(encodingConfig);
Hca = hcaFormat.Hca;
AudioData = hcaFormat.AudioData;
if (Configuration.EncryptionKey != null)
{
CriHcaEncryption.Crypt(Hca, AudioData, Configuration.EncryptionKey, false);
Hca.EncryptionType = Configuration.EncryptionKey.KeyType;
}
}
protected override IAudioFormat ToAudioStream(HcaStructure structure)
{
if (structure.EncryptionKey != null)
{
CriHcaEncryption.Decrypt(structure.Hca, structure.AudioData, structure.EncryptionKey);
}
return(new CriHcaFormatBuilder(structure.AudioData, structure.Hca).Build());
}
private static CriHcaKey FindKey(HcaStructure structure)
{
switch (structure.Hca.EncryptionType)
{
case 0:
return(null);
case 1:
return(new CriHcaKey(CriHcaKey.Type.Type1));
case 56:
return(CriHcaEncryption.FindKey(structure.Hca, structure.AudioData) ??
throw new InvalidDataException("Cannot find key to decrypt HCA file."));
default:
return(null);
}
}
