44 #define MIN_WORD (-32767 - 1)
45 #define MAX_WORD 32767
47 #define MIN_LONGWORD (-2147483647 - 1)
48 #define MAX_LONGWORD 2147483647
52 #define SASR(x, by) ((x) >> (by))
54 #define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
92 #define GSM_MULT_R(a, b) \
93 (SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
95 # define GSM_MULT(a,b) \
96 (SASR( ((longword)(a) * (longword)(b)), 15 ))
98 # define GSM_L_MULT(a, b) \
99 (((longword)(a) * (longword)(b)) << 1)
101 # define GSM_L_ADD(a, b) \
102 ( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
103 : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
104 >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
105 : ((b) <= 0 ? (a) + (b) \
106 : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
107 ? MAX_LONGWORD : utmp))
116 #define GSM_ADD(a, b) \
117 ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
118 MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
120 # define GSM_SUB(a, b) \
121 ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
122 ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
124 # define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
143 extern void Gsm_Coder
P((
153 extern void Gsm_Long_Term_Predictor
P((
162 extern void Gsm_LPC_Analysis
P((
167 extern void Gsm_Preprocess
P((
171 extern void Gsm_Encoding
P((
179 extern void Gsm_Short_Term_Analysis_Filter
P((
184 extern void Gsm_Decoder
P((
194 extern void Gsm_Decoding
P((
201 extern void Gsm_Long_Term_Synthesis_Filtering
P((
208 void Gsm_RPE_Decoding
P((
215 void Gsm_RPE_Encoding
P((
222 extern void Gsm_Short_Term_Synthesis_Filter
P((
228 extern void Gsm_Update_of_reconstructed_short_time_residual_signal
P((
252 # define gsm_debug_words(a, b, c, d)
253 # define gsm_debug_longwords(a, b, c, d)
254 # define gsm_debug_word(a, b)
255 # define gsm_debug_longword(a, b)
259 extern void gsm_debug_words
P((
char * name,
int,
int,
word *));
260 extern void gsm_debug_longwords
P((
char * name,
int,
int,
longword *));
261 extern void gsm_debug_longword
P((
char * name,
longword));
262 extern void gsm_debug_word
P((
char * name,
word));