-int t2_encode_packets(opj_t2_t* t2, int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_image_info_t *image_info);
+int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,int tpnum, int tppos,int pino,J2K_T2_MODE t2_mode,int cur_totnum_tp);
+/**
+Decode the packets of a tile from a source buffer
+@param t2 T2 handle
+@param src the source buffer
+@param len length of the source buffer
+@param tileno number that identifies the tile for which to decode the packets
+@param tile tile for which to decode the packets
+@param cstr_info Codestream information structure
+ */
+int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info);