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/cvs/gvpe/src/rohc/decomp.h
Revision: 1.2
Committed: Tue Apr 26 00:55:56 2005 UTC (21 years, 5 months ago) by pcg
Content type: text/plain
Branch: MAIN
CVS Tags: rel-2_01, rel-3_0, rel-2_2, rel-2_0, rel-2_21, rel-2_22, rel-2_25, HEAD
Changes since 1.1: +1 -1 lines
Log Message: 
*** empty log message ***

File Contents

# Content
1 /*
2 ROHC Project 2003 at Lulea University of Technology, Sweden.
3 Authors: Andreas Vernersson <andver-8@student.luth.se>
4 Daniel Pettersson <danpet-7@student.luth.se>
5 Erik Soderstrom <soderstrom@yahoo.com>
6 Fredrik Lindstrom <frelin-9@student.luth.se>
7 Johan Stenmark <johste-8@student.luth.se>
8 Martin Juhlin <juhlin@users.sourceforge.net>
9 Mikael Larsson <larmik-9@student.luth.se>
10 Robert Maxe <robmax-1@student.luth.se>
11
12 Copyright (C) 2003 Andreas Vernersson, Daniel Pettersson,
13 Erik Soderström, Fredrik Lindström, Johan Stenmark,
14 Martin Juhlin, Mikael Larsson, Robert Maxe.
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
20
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
25
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30 //----------------------------------------------------------------------------------------------------------------------------------
31 #ifndef _DECOMP_H
32 #define _DECOMP_H
33 //----------------------------------------------------------------------------------------------------------------------------------
34 #include "rohc.h"
35 #include "d_util.h"
36 #include "comp.h"
37
38 #define D_NUM_PROFILES 4
39 //----------------------------------------------------------------------------------------------------------------------------------
40 struct sd_decode_data
41 {
42 int cid;
43 int addcidUsed;
44 int largecidUsed;
45 struct sd_context * active;
46 };
47 //----------------------------------------------------------------------------------------------------------------------------------
48 struct sd_statistics
49 {
50 unsigned int packets_received;
51 unsigned int packets_failed_crc;
52 unsigned int packets_failed_no_context;
53 unsigned int packets_failed_package;
54 unsigned int packets_feedback;
55 };
56 //----------------------------------------------------------------------------------------------------------------------------------
57 struct sd_rohc
58 {
59 struct sd_context ** context;
60 int context_array_size;
61
62 struct s_medium * medium;
63 struct sc_rohc * compressor;
64
65 unsigned int maxval; // updated from GUI
66 unsigned int errval;
67 unsigned int okval;
68 int curval;
69
70 struct sd_statistics statistics;
71 };
72 //----------------------------------------------------------------------------------------------------------------------------------
73 // Medium specific data
74 //----------------------------------------------------------------------------------------------------------------------------------
75 struct s_medium
76 {
77 int cid_type; // large or small cid
78 int max_cid; // maximum cid value
79 };
80 //----------------------------------------------------------------------------------------------------------------------------------
81 // The context structure
82 //----------------------------------------------------------------------------------------------------------------------------------
83 struct sd_context
84 {
85 //int last_failed;
86
87 struct s_profile * profile; // used profile
88
89 void * data; // profile data
90
91 int mode; // U_MODE, O_MODE, R_MODE
92 int state; // NO_CONTEXT, STATIC_CONTEXT, FULL_CONTEXT
93
94
95 int latest_used, first_used; // timestamps..
96
97 // statistics variables..
98 int total_uncompressed_size, total_compressed_size;
99 int header_uncompressed_size, header_compressed_size;
100 int num_recv_packets, num_recv_ir, num_recv_ir_dyn, num_sent_feedbacks;
101 int num_decomp_failures, num_decomp_repairs;
102 struct sc_wlsb *total_16_uncompressed, *total_16_compressed;
103 struct sc_wlsb *header_16_uncompressed, *header_16_compressed;
104
105 int curval;
106 };
107 //----------------------------------------------------------------------------------------------------------------------------------
108 // The profile structure
109 //----------------------------------------------------------------------------------------------------------------------------------
110 struct s_profile
111 {
112 int id; // 0x0000 fr uncompress, etc
113 char *version;
114 char *description;
115
116 int (*decode) (
117 struct sd_rohc * state,
118 struct sd_context * context,
119 unsigned char * src,
120 int size,
121 int second_byte,
122 unsigned char * dest
123 );
124
125 int (*decode_ir) (
126 struct sd_rohc * state,
127 struct sd_context * context,
128 unsigned char * src,
129 int size,
130 int last_bit,
131 unsigned char * dest
132 );
133
134 void *(*allocate_decode_data)(void);
135 void (*free_decode_data)(void *);
136
137 int (*detect_ir_size)(unsigned char * first_byte, int second_byte_add);
138 int (*detect_ir_dyn_size)(unsigned char * first_byte, struct sd_context * context);
139 int (*get_sn)(struct sd_context * context);
140 };
141 //----------------------------------------------------------------------------------------------------------------------------------
142 void context_array_increase(struct sd_rohc * state, int highestcid);
143 void context_array_decrease(struct sd_rohc * state);
144
145 struct sd_context * find_context(struct sd_rohc * state, int cid);
146 struct sd_context * context_create(struct sd_rohc * state, int with_cid, struct s_profile * profile);
147 void context_free(struct sd_context * context);
148
149 struct sd_rohc * rohc_alloc_decompressor(struct sc_rohc *compressor);
150 void rohc_free_decompressor(struct sd_rohc * state);
151 int rohc_decompress(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize );
152
153 int rohc_d_statistics(struct sd_rohc *, char *buffer); // store statistics about decompressor
154 int rohc_d_context(struct sd_rohc *, int index, char *buffer); // store statistics about a context
155
156 int rohc_decompress_both(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize, int large);
157
158 int d_decode_header(struct sd_rohc * state, unsigned char * ibuf, int isize, unsigned char * obuf, int osize, struct sd_decode_data * ddata);
159 int d_decode_feedback(struct sd_rohc * state, unsigned char * ibuf);
160 int d_decode_feedback_first(struct sd_rohc * state, unsigned char ** walk, const int isize);
161
162 void d_operation_mode_feedback(struct sd_rohc * state, int rohc_status, int cid, int addcidUsed, int largecidUsed, int mode, struct sd_context * ctxt);
163 void d_change_mode_feedback(struct sd_rohc * state, struct sd_context * ctxt);
164
165 int rohc_ir_packet_crc_ok(unsigned char * walk, const int largecid, const int addcidUsed, const struct s_profile * profile);
166 int rohc_ir_dyn_packet_crc_ok(unsigned char * walk, const int largecid, const int addcidUsed, const struct s_profile * profile, struct sd_context * context);
167
168 void clear_statistics(struct sd_rohc * state);
169 void usergui_interactions(struct sd_rohc * state, int feedback_maxval);
170 //----------------------------------------------------------------------------------------------------------------------------------
171 #endif
172 //----------------------------------------------------------------------------------------------------------------------------------