public static extern void av_rc4_crypt(libavutil.AVRC4 *d, byte *dst, byte *src, int count, byte *iv, int decrypt);
public static extern int av_rc4_init(libavutil.AVRC4 *d, byte *key, int key_bits, int decrypt);
public static extern void av_rc4_crypt(libavutil.AVRC4 *d, byte *dst, byte *src, int count, byte *iv, int decrypt);
public static extern int av_rc4_init(libavutil.AVRC4 *d, byte *key, int key_bits, int decrypt);