ROHC compression/decompression library: ts_sc

Go to the documentation of this file.
00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 2 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * This program is distributed in the hope that it will be useful,
00008  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00009  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00010  * GNU General Public License for more details.
00011  *
00012  * You should have received a copy of the GNU General Public License
00013  * along with this program; if not, write to the Free Software
00014  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00015  */
00016 
00027 #ifndef TS_SC_COMP_H
00028 #define TS_SC_COMP_H
00029 
00030 #include "rohc.h"
00031 
00032 
00039 typedef enum
00040 {
00042         INIT_TS = 1,
00044         INIT_STRIDE = 2,
00046         SEND_SCALED = 3,
00047 } ts_sc_state;
00048 
00049 
00056 struct ts_sc_comp
00057 {
00059         int ts_stride;
00060 
00062         int ts_scaled;
00064         struct c_wlsb *scaled_window;
00065 
00067         int ts_offset;
00068 
00070         unsigned int ts;
00072         unsigned int old_ts;
00073 
00075         unsigned int sn;
00077         unsigned int old_sn;
00078 
00080         int is_deductible;
00081 
00083         ts_sc_state state;
00084 
00086         int ts_delta;
00087 };
00088 
00089 
00090 
00091 /*
00092  * Function prototypes
00093  */
00094 
00095 int c_create_sc(struct ts_sc_comp *ts_sc);
00096 void c_destroy_sc(struct ts_sc_comp *ts_sc);
00097 
00098 void c_add_ts(struct ts_sc_comp *ts_sc, unsigned int ts, unsigned int sn);
00099 
00100 int nb_bits_stride(struct ts_sc_comp ts_sc);
00101 int nb_bits_scaled(struct ts_sc_comp ts_sc);
00102 
00103 void add_stride(struct ts_sc_comp *ts_sc, int sn);
00104 void add_scaled(struct ts_sc_comp *ts_sc, int sn);
00105 
00106 int get_ts_stride(struct ts_sc_comp ts_sc);
00107 int get_ts_scaled(struct ts_sc_comp ts_sc);
00108 int get_ts_offset(struct ts_sc_comp ts_sc);
00109 
00110 int is_deductible(struct ts_sc_comp ts_sc);
00111 int is_ts_constant(struct ts_sc_comp ts_sc);
00112 
00113 
00114 #endif
00115