2 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
3 * Universitaet Berlin. See the accompanying file "COPYRIGHT" for
4 * details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
7 /*$Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/private.h,v 1.6 1996/07/02 10:15:26 jutta Exp $*/
12 typedef short word; /* 16 bit signed int */
13 typedef long longword; /* 32 bit signed int */
15 typedef unsigned short uword; /* unsigned word */
16 typedef unsigned long ulongword; /* unsigned longword */
21 word e[ 50 ]; /* code.c */
23 word z1; /* preprocessing.c, Offset_com. */
24 longword L_z2; /* Offset_com. */
25 int mp; /* Preemphasis */
27 word u[8]; /* short_term_aly_filter.c */
28 word LARpp[2][8]; /* */
31 word ltp_cut; /* long_term.c, LTP crosscorr. */
32 word nrp; /* 40 */ /* long_term.c, synthesis */
33 word v[9]; /* short_term.c, synthesis */
34 word msr; /* decoder.c, Postprocessing */
36 char verbose; /* only used if !NDEBUG */
37 char fast; /* only used if FAST */
39 char wav_fmt; /* only used if WAV49 defined */
40 unsigned char frame_index; /* odd/even chaining */
41 unsigned char frame_chain; /* half-byte to carry forward */
45 #define MIN_WORD (-32767 - 1)
46 #define MAX_WORD 32767
48 #define MIN_LONGWORD (-2147483647 - 1)
49 #define MAX_LONGWORD 2147483647
51 #ifdef SASR /* flag: >> is a signed arithmetic shift right */
53 #define SASR(x, by) ((x) >> (by))
55 #define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
61 * Prototypes from add.c
63 extern word gsm_mult P((word a, word b));
64 extern longword gsm_L_mult P((word a, word b));
65 extern word gsm_mult_r P((word a, word b));
67 extern word gsm_div P((word num, word denum));
69 extern word gsm_add P(( word a, word b ));
70 extern longword gsm_L_add P(( longword a, longword b ));
72 extern word gsm_sub P((word a, word b));
73 extern longword gsm_L_sub P((longword a, longword b));
75 extern word gsm_abs P((word a));
77 extern word gsm_norm P(( longword a ));
79 extern longword gsm_L_asl P((longword a, int n));
80 extern word gsm_asl P((word a, int n));
82 extern longword gsm_L_asr P((longword a, int n));
83 extern word gsm_asr P((word a, int n));
86 * Inlined functions from add.h
90 * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
91 * (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
93 #define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \
94 (SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
96 # define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \
97 (SASR( ((longword)(a) * (longword)(b)), 15 ))
99 # define GSM_L_MULT(a, b) /* word a, word b */ \
100 (((longword)(a) * (longword)(b)) << 1)
102 # define GSM_L_ADD(a, b) \
103 ( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
104 : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
105 >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
106 : ((b) <= 0 ? (a) + (b) \
107 : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
108 ? MAX_LONGWORD : utmp))
111 * # define GSM_ADD(a, b) \
112 * ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
113 * ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
115 /* Nonportable, but faster: */
117 #define GSM_ADD(a, b) \
118 ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
119 MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
121 # define GSM_SUB(a, b) \
122 ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
123 ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
125 # define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
127 /* Use these if necessary:
129 # define GSM_MULT_R(a, b) gsm_mult_r(a, b)
130 # define GSM_MULT(a, b) gsm_mult(a, b)
131 # define GSM_L_MULT(a, b) gsm_L_mult(a, b)
133 # define GSM_L_ADD(a, b) gsm_L_add(a, b)
134 # define GSM_ADD(a, b) gsm_add(a, b)
135 # define GSM_SUB(a, b) gsm_sub(a, b)
137 # define GSM_ABS(a) gsm_abs(a)
142 * More prototypes from implementations..
144 extern void Gsm_Coder P((
145 struct gsm_state * S,
146 word * s, /* [0..159] samples IN */
147 word * LARc, /* [0..7] LAR coefficients OUT */
148 word * Nc, /* [0..3] LTP lag OUT */
149 word * bc, /* [0..3] coded LTP gain OUT */
150 word * Mc, /* [0..3] RPE grid selection OUT */
151 word * xmaxc,/* [0..3] Coded maximum amplitude OUT */
152 word * xMc /* [13*4] normalized RPE samples OUT */));
154 extern void Gsm_Long_Term_Predictor P(( /* 4x for 160 samples */
155 struct gsm_state * S,
156 word * d, /* [0..39] residual signal IN */
157 word * dp, /* [-120..-1] d' IN */
158 word * e, /* [0..40] OUT */
159 word * dpp, /* [0..40] OUT */
160 word * Nc, /* correlation lag OUT */
161 word * bc /* gain factor OUT */));
163 extern void Gsm_LPC_Analysis P((
164 struct gsm_state * S,
165 word * s, /* 0..159 signals IN/OUT */
166 word * LARc)); /* 0..7 LARc's OUT */
168 extern void Gsm_Preprocess P((
169 struct gsm_state * S,
170 word * s, word * so));
172 extern void Gsm_Encoding P((
173 struct gsm_state * S,
180 extern void Gsm_Short_Term_Analysis_Filter P((
181 struct gsm_state * S,
182 word * LARc, /* coded log area ratio [0..7] IN */
183 word * d /* st res. signal [0..159] IN/OUT */));
185 extern void Gsm_Decoder P((
186 struct gsm_state * S,
187 word * LARcr, /* [0..7] IN */
188 word * Ncr, /* [0..3] IN */
189 word * bcr, /* [0..3] IN */
190 word * Mcr, /* [0..3] IN */
191 word * xmaxcr, /* [0..3] IN */
192 word * xMcr, /* [0..13*4] IN */
193 word * s)); /* [0..159] OUT */
195 extern void Gsm_Decoding P((
196 struct gsm_state * S,
199 word * xMcr, /* [0..12] IN */
200 word * erp)); /* [0..39] OUT */
202 extern void Gsm_Long_Term_Synthesis_Filtering P((
206 word * erp, /* [0..39] IN */
207 word * drp)); /* [-120..-1] IN, [0..40] OUT */
209 void Gsm_RPE_Decoding P((
213 word * xMcr, /* [0..12], 3 bits IN */
214 word * erp)); /* [0..39] OUT */
216 void Gsm_RPE_Encoding P((
217 struct gsm_state * S,
218 word * e, /* -5..-1][0..39][40..44 IN/OUT */
219 word * xmaxc, /* OUT */
221 word * xMc)); /* [0..12] OUT */
223 extern void Gsm_Short_Term_Synthesis_Filter P((
224 struct gsm_state * S,
225 word * LARcr, /* log area ratios [0..7] IN */
226 word * drp, /* received d [0...39] IN */
227 word * s)); /* signal s [0..159] OUT */
229 extern void Gsm_Update_of_reconstructed_short_time_residual_signal P((
230 word * dpp, /* [0...39] IN */
231 word * ep, /* [0...39] IN */
232 word * dp)); /* [-120...-1] IN/OUT */
235 * Tables from table.c
239 extern word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8];
240 extern word gsm_INVA[8];
241 extern word gsm_DLB[4], gsm_QLB[4];
242 extern word gsm_H[11];
243 extern word gsm_NRFAC[8];
244 extern word gsm_FAC[8];
246 #endif /* GSM_TABLE_C */
253 # define gsm_debug_words(a, b, c, d) /* nil */
254 # define gsm_debug_longwords(a, b, c, d) /* nil */
255 # define gsm_debug_word(a, b) /* nil */
256 # define gsm_debug_longword(a, b) /* nil */
258 #else /* !NDEBUG => DEBUG */
260 extern void gsm_debug_words P((char * name, int, int, word *));
261 extern void gsm_debug_longwords P((char * name, int, int, longword *));
262 extern void gsm_debug_longword P((char * name, longword));
263 extern void gsm_debug_word P((char * name, word));
269 #endif /* PRIVATE_H */