예제 #1
0
        public ChannelStreamer(Protocol protocol, Media.File file, byte[] key, MusicStream output)
        {
            if (key.Length != (128 / 8))
            {
                output.AllAvailable = true;
                throw new InvalidDataException("Encryption key for channel must be 128-bit.");
            }

            _cipher.BlockSize = 128;
            _cipher.KeySize = 128;
            _key = key;
            _cipher.Mode = CipherMode.ECB; //CTR not available
            _cipher.Padding = PaddingMode.None;

            _output = output;

            _file = file;
            _protocol = protocol;

            _channelLength = 160 * 1024 * 5 / 8; /* 160 kbit * 5 seconds. */

            /* Send first substream request. */
            string hash = this._cache.Hash(this._file, this._channelOffset, this._channelLength);

            if (this._cache != null && this._cache.Contains("substream", hash))
            {
                this._cache.Load("substream", hash, this);
            }
            else
            {
                try
                {
                    this._protocol.SendSubstreamRequest(this, this._file, this._channelOffset, this._channelLength);
                }
                catch (ProtocolException)
                {
                    return;
                }
            }
        }
예제 #2
0
 public string Hash(Media.File file, int offset, int length)
 {
     return file.Id + "/" + offset + "-" + length;
 }