Write some Software

Need an android ndk library (to be run on android devices) to decode audio files that are encoded using Opus or Speex audio codec (Opus preferred) and encrypted using a stream cipher (aes preferred). Provided a file pointer and a decryption key, the library should be able to: 1) Decrypt and decode the contents at the file pointer in chunks. 2) Support decrypting+decoding files that are partially downloaded, while they are being downloaded. 3) Support seeking to a given timestamp lying within the downloaded part of the file.