Bug Summary

File:libs/libsndfile/src/GSM610/gsm_decode.c
Location:line 101, column 25
Description:Value stored to 'sr' is never read

Annotated Source Code

1/*
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.
5 */
6
7#include "gsm610_priv.h"
8
9#include "gsm.h"
10
11int gsm_decode (gsm s, gsm_byte * c, gsm_signal * target)
12{
13 word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
14
15#ifdef WAV49
16 if (s->wav_fmt) {
17
18 uword sr = 0;
19
20 s->frame_index = !s->frame_index;
21 if (s->frame_index) {
22
23 sr = *c++;
24 LARc[0] = sr & 0x3f; sr >>= 6;
25 sr |= (uword)*c++ << 2;
26 LARc[1] = sr & 0x3f; sr >>= 6;
27 sr |= (uword)*c++ << 4;
28 LARc[2] = sr & 0x1f; sr >>= 5;
29 LARc[3] = sr & 0x1f; sr >>= 5;
30 sr |= (uword)*c++ << 2;
31 LARc[4] = sr & 0xf; sr >>= 4;
32 LARc[5] = sr & 0xf; sr >>= 4;
33 sr |= (uword)*c++ << 2; /* 5 */
34 LARc[6] = sr & 0x7; sr >>= 3;
35 LARc[7] = sr & 0x7; sr >>= 3;
36 sr |= (uword)*c++ << 4;
37 Nc[0] = sr & 0x7f; sr >>= 7;
38 bc[0] = sr & 0x3; sr >>= 2;
39 Mc[0] = sr & 0x3; sr >>= 2;
40 sr |= (uword)*c++ << 1;
41 xmaxc[0] = sr & 0x3f; sr >>= 6;
42 xmc[0] = sr & 0x7; sr >>= 3;
43 sr = *c++;
44 xmc[1] = sr & 0x7; sr >>= 3;
45 xmc[2] = sr & 0x7; sr >>= 3;
46 sr |= (uword)*c++ << 2;
47 xmc[3] = sr & 0x7; sr >>= 3;
48 xmc[4] = sr & 0x7; sr >>= 3;
49 xmc[5] = sr & 0x7; sr >>= 3;
50 sr |= (uword)*c++ << 1; /* 10 */
51 xmc[6] = sr & 0x7; sr >>= 3;
52 xmc[7] = sr & 0x7; sr >>= 3;
53 xmc[8] = sr & 0x7; sr >>= 3;
54 sr = *c++;
55 xmc[9] = sr & 0x7; sr >>= 3;
56 xmc[10] = sr & 0x7; sr >>= 3;
57 sr |= (uword)*c++ << 2;
58 xmc[11] = sr & 0x7; sr >>= 3;
59 xmc[12] = sr & 0x7; sr >>= 3;
60 sr |= (uword)*c++ << 4;
61 Nc[1] = sr & 0x7f; sr >>= 7;
62 bc[1] = sr & 0x3; sr >>= 2;
63 Mc[1] = sr & 0x3; sr >>= 2;
64 sr |= (uword)*c++ << 1;
65 xmaxc[1] = sr & 0x3f; sr >>= 6;
66 xmc[13] = sr & 0x7; sr >>= 3;
67 sr = *c++; /* 15 */
68 xmc[14] = sr & 0x7; sr >>= 3;
69 xmc[15] = sr & 0x7; sr >>= 3;
70 sr |= (uword)*c++ << 2;
71 xmc[16] = sr & 0x7; sr >>= 3;
72 xmc[17] = sr & 0x7; sr >>= 3;
73 xmc[18] = sr & 0x7; sr >>= 3;
74 sr |= (uword)*c++ << 1;
75 xmc[19] = sr & 0x7; sr >>= 3;
76 xmc[20] = sr & 0x7; sr >>= 3;
77 xmc[21] = sr & 0x7; sr >>= 3;
78 sr = *c++;
79 xmc[22] = sr & 0x7; sr >>= 3;
80 xmc[23] = sr & 0x7; sr >>= 3;
81 sr |= (uword)*c++ << 2;
82 xmc[24] = sr & 0x7; sr >>= 3;
83 xmc[25] = sr & 0x7; sr >>= 3;
84 sr |= (uword)*c++ << 4; /* 20 */
85 Nc[2] = sr & 0x7f; sr >>= 7;
86 bc[2] = sr & 0x3; sr >>= 2;
87 Mc[2] = sr & 0x3; sr >>= 2;
88 sr |= (uword)*c++ << 1;
89 xmaxc[2] = sr & 0x3f; sr >>= 6;
90 xmc[26] = sr & 0x7; sr >>= 3;
91 sr = *c++;
92 xmc[27] = sr & 0x7; sr >>= 3;
93 xmc[28] = sr & 0x7; sr >>= 3;
94 sr |= (uword)*c++ << 2;
95 xmc[29] = sr & 0x7; sr >>= 3;
96 xmc[30] = sr & 0x7; sr >>= 3;
97 xmc[31] = sr & 0x7; sr >>= 3;
98 sr |= (uword)*c++ << 1;
99 xmc[32] = sr & 0x7; sr >>= 3;
100 xmc[33] = sr & 0x7; sr >>= 3;
101 xmc[34] = sr & 0x7; sr >>= 3;
Value stored to 'sr' is never read
102 sr = *c++; /* 25 */
103 xmc[35] = sr & 0x7; sr >>= 3;
104 xmc[36] = sr & 0x7; sr >>= 3;
105 sr |= (uword)*c++ << 2;
106 xmc[37] = sr & 0x7; sr >>= 3;
107 xmc[38] = sr & 0x7; sr >>= 3;
108 sr |= (uword)*c++ << 4;
109 Nc[3] = sr & 0x7f; sr >>= 7;
110 bc[3] = sr & 0x3; sr >>= 2;
111 Mc[3] = sr & 0x3; sr >>= 2;
112 sr |= (uword)*c++ << 1;
113 xmaxc[3] = sr & 0x3f; sr >>= 6;
114 xmc[39] = sr & 0x7; sr >>= 3;
115 sr = *c++;
116 xmc[40] = sr & 0x7; sr >>= 3;
117 xmc[41] = sr & 0x7; sr >>= 3;
118 sr |= (uword)*c++ << 2; /* 30 */
119 xmc[42] = sr & 0x7; sr >>= 3;
120 xmc[43] = sr & 0x7; sr >>= 3;
121 xmc[44] = sr & 0x7; sr >>= 3;
122 sr |= (uword)*c++ << 1;
123 xmc[45] = sr & 0x7; sr >>= 3;
124 xmc[46] = sr & 0x7; sr >>= 3;
125 xmc[47] = sr & 0x7; sr >>= 3;
126 sr = *c++;
127 xmc[48] = sr & 0x7; sr >>= 3;
128 xmc[49] = sr & 0x7; sr >>= 3;
129 sr |= (uword)*c++ << 2;
130 xmc[50] = sr & 0x7; sr >>= 3;
131 xmc[51] = sr & 0x7; sr >>= 3;
132
133 s->frame_chain = sr & 0xf;
134 }
135 else {
136 sr = s->frame_chain;
137 sr |= (uword)*c++ << 4; /* 1 */
138 LARc[0] = sr & 0x3f; sr >>= 6;
139 LARc[1] = sr & 0x3f; sr >>= 6;
140 sr = *c++;
141 LARc[2] = sr & 0x1f; sr >>= 5;
142 sr |= (uword)*c++ << 3;
143 LARc[3] = sr & 0x1f; sr >>= 5;
144 LARc[4] = sr & 0xf; sr >>= 4;
145 sr |= (uword)*c++ << 2;
146 LARc[5] = sr & 0xf; sr >>= 4;
147 LARc[6] = sr & 0x7; sr >>= 3;
148 LARc[7] = sr & 0x7; sr >>= 3;
149 sr = *c++; /* 5 */
150 Nc[0] = sr & 0x7f; sr >>= 7;
151 sr |= (uword)*c++ << 1;
152 bc[0] = sr & 0x3; sr >>= 2;
153 Mc[0] = sr & 0x3; sr >>= 2;
154 sr |= (uword)*c++ << 5;
155 xmaxc[0] = sr & 0x3f; sr >>= 6;
156 xmc[0] = sr & 0x7; sr >>= 3;
157 xmc[1] = sr & 0x7; sr >>= 3;
158 sr |= (uword)*c++ << 1;
159 xmc[2] = sr & 0x7; sr >>= 3;
160 xmc[3] = sr & 0x7; sr >>= 3;
161 xmc[4] = sr & 0x7; sr >>= 3;
162 sr = *c++;
163 xmc[5] = sr & 0x7; sr >>= 3;
164 xmc[6] = sr & 0x7; sr >>= 3;
165 sr |= (uword)*c++ << 2; /* 10 */
166 xmc[7] = sr & 0x7; sr >>= 3;
167 xmc[8] = sr & 0x7; sr >>= 3;
168 xmc[9] = sr & 0x7; sr >>= 3;
169 sr |= (uword)*c++ << 1;
170 xmc[10] = sr & 0x7; sr >>= 3;
171 xmc[11] = sr & 0x7; sr >>= 3;
172 xmc[12] = sr & 0x7; sr >>= 3;
173 sr = *c++;
174 Nc[1] = sr & 0x7f; sr >>= 7;
175 sr |= (uword)*c++ << 1;
176 bc[1] = sr & 0x3; sr >>= 2;
177 Mc[1] = sr & 0x3; sr >>= 2;
178 sr |= (uword)*c++ << 5;
179 xmaxc[1] = sr & 0x3f; sr >>= 6;
180 xmc[13] = sr & 0x7; sr >>= 3;
181 xmc[14] = sr & 0x7; sr >>= 3;
182 sr |= (uword)*c++ << 1; /* 15 */
183 xmc[15] = sr & 0x7; sr >>= 3;
184 xmc[16] = sr & 0x7; sr >>= 3;
185 xmc[17] = sr & 0x7; sr >>= 3;
186 sr = *c++;
187 xmc[18] = sr & 0x7; sr >>= 3;
188 xmc[19] = sr & 0x7; sr >>= 3;
189 sr |= (uword)*c++ << 2;
190 xmc[20] = sr & 0x7; sr >>= 3;
191 xmc[21] = sr & 0x7; sr >>= 3;
192 xmc[22] = sr & 0x7; sr >>= 3;
193 sr |= (uword)*c++ << 1;
194 xmc[23] = sr & 0x7; sr >>= 3;
195 xmc[24] = sr & 0x7; sr >>= 3;
196 xmc[25] = sr & 0x7; sr >>= 3;
197 sr = *c++;
198 Nc[2] = sr & 0x7f; sr >>= 7;
199 sr |= (uword)*c++ << 1; /* 20 */
200 bc[2] = sr & 0x3; sr >>= 2;
201 Mc[2] = sr & 0x3; sr >>= 2;
202 sr |= (uword)*c++ << 5;
203 xmaxc[2] = sr & 0x3f; sr >>= 6;
204 xmc[26] = sr & 0x7; sr >>= 3;
205 xmc[27] = sr & 0x7; sr >>= 3;
206 sr |= (uword)*c++ << 1;
207 xmc[28] = sr & 0x7; sr >>= 3;
208 xmc[29] = sr & 0x7; sr >>= 3;
209 xmc[30] = sr & 0x7; sr >>= 3;
210 sr = *c++;
211 xmc[31] = sr & 0x7; sr >>= 3;
212 xmc[32] = sr & 0x7; sr >>= 3;
213 sr |= (uword)*c++ << 2;
214 xmc[33] = sr & 0x7; sr >>= 3;
215 xmc[34] = sr & 0x7; sr >>= 3;
216 xmc[35] = sr & 0x7; sr >>= 3;
217 sr |= (uword)*c++ << 1; /* 25 */
218 xmc[36] = sr & 0x7; sr >>= 3;
219 xmc[37] = sr & 0x7; sr >>= 3;
220 xmc[38] = sr & 0x7; sr >>= 3;
221 sr = *c++;
222 Nc[3] = sr & 0x7f; sr >>= 7;
223 sr |= (uword)*c++ << 1;
224 bc[3] = sr & 0x3; sr >>= 2;
225 Mc[3] = sr & 0x3; sr >>= 2;
226 sr |= (uword)*c++ << 5;
227 xmaxc[3] = sr & 0x3f; sr >>= 6;
228 xmc[39] = sr & 0x7; sr >>= 3;
229 xmc[40] = sr & 0x7; sr >>= 3;
230 sr |= (uword)*c++ << 1;
231 xmc[41] = sr & 0x7; sr >>= 3;
232 xmc[42] = sr & 0x7; sr >>= 3;
233 xmc[43] = sr & 0x7; sr >>= 3;
234 sr = *c++; /* 30 */
235 xmc[44] = sr & 0x7; sr >>= 3;
236 xmc[45] = sr & 0x7; sr >>= 3;
237 sr |= (uword)*c++ << 2;
238 xmc[46] = sr & 0x7; sr >>= 3;
239 xmc[47] = sr & 0x7; sr >>= 3;
240 xmc[48] = sr & 0x7; sr >>= 3;
241 sr |= (uword)*c++ << 1;
242 xmc[49] = sr & 0x7; sr >>= 3;
243 xmc[50] = sr & 0x7; sr >>= 3;
244 xmc[51] = sr & 0x7; sr >>= 3;
245 }
246 }
247 else
248#endif
249 {
250 /* GSM_MAGIC = (*c >> 4) & 0xF; */
251
252 if (((*c >> 4) & 0x0F) != GSM_MAGIC0xD) return -1;
253
254 LARc[0] = (*c++ & 0xF) << 2; /* 1 */
255 LARc[0] |= (*c >> 6) & 0x3;
256 LARc[1] = *c++ & 0x3F;
257 LARc[2] = (*c >> 3) & 0x1F;
258 LARc[3] = (*c++ & 0x7) << 2;
259 LARc[3] |= (*c >> 6) & 0x3;
260 LARc[4] = (*c >> 2) & 0xF;
261 LARc[5] = (*c++ & 0x3) << 2;
262 LARc[5] |= (*c >> 6) & 0x3;
263 LARc[6] = (*c >> 3) & 0x7;
264 LARc[7] = *c++ & 0x7;
265 Nc[0] = (*c >> 1) & 0x7F;
266 bc[0] = (*c++ & 0x1) << 1;
267 bc[0] |= (*c >> 7) & 0x1;
268 Mc[0] = (*c >> 5) & 0x3;
269 xmaxc[0] = (*c++ & 0x1F) << 1;
270 xmaxc[0] |= (*c >> 7) & 0x1;
271 xmc[0] = (*c >> 4) & 0x7;
272 xmc[1] = (*c >> 1) & 0x7;
273 xmc[2] = (*c++ & 0x1) << 2;
274 xmc[2] |= (*c >> 6) & 0x3;
275 xmc[3] = (*c >> 3) & 0x7;
276 xmc[4] = *c++ & 0x7;
277 xmc[5] = (*c >> 5) & 0x7;
278 xmc[6] = (*c >> 2) & 0x7;
279 xmc[7] = (*c++ & 0x3) << 1; /* 10 */
280 xmc[7] |= (*c >> 7) & 0x1;
281 xmc[8] = (*c >> 4) & 0x7;
282 xmc[9] = (*c >> 1) & 0x7;
283 xmc[10] = (*c++ & 0x1) << 2;
284 xmc[10] |= (*c >> 6) & 0x3;
285 xmc[11] = (*c >> 3) & 0x7;
286 xmc[12] = *c++ & 0x7;
287 Nc[1] = (*c >> 1) & 0x7F;
288 bc[1] = (*c++ & 0x1) << 1;
289 bc[1] |= (*c >> 7) & 0x1;
290 Mc[1] = (*c >> 5) & 0x3;
291 xmaxc[1] = (*c++ & 0x1F) << 1;
292 xmaxc[1] |= (*c >> 7) & 0x1;
293 xmc[13] = (*c >> 4) & 0x7;
294 xmc[14] = (*c >> 1) & 0x7;
295 xmc[15] = (*c++ & 0x1) << 2;
296 xmc[15] |= (*c >> 6) & 0x3;
297 xmc[16] = (*c >> 3) & 0x7;
298 xmc[17] = *c++ & 0x7;
299 xmc[18] = (*c >> 5) & 0x7;
300 xmc[19] = (*c >> 2) & 0x7;
301 xmc[20] = (*c++ & 0x3) << 1;
302 xmc[20] |= (*c >> 7) & 0x1;
303 xmc[21] = (*c >> 4) & 0x7;
304 xmc[22] = (*c >> 1) & 0x7;
305 xmc[23] = (*c++ & 0x1) << 2;
306 xmc[23] |= (*c >> 6) & 0x3;
307 xmc[24] = (*c >> 3) & 0x7;
308 xmc[25] = *c++ & 0x7;
309 Nc[2] = (*c >> 1) & 0x7F;
310 bc[2] = (*c++ & 0x1) << 1; /* 20 */
311 bc[2] |= (*c >> 7) & 0x1;
312 Mc[2] = (*c >> 5) & 0x3;
313 xmaxc[2] = (*c++ & 0x1F) << 1;
314 xmaxc[2] |= (*c >> 7) & 0x1;
315 xmc[26] = (*c >> 4) & 0x7;
316 xmc[27] = (*c >> 1) & 0x7;
317 xmc[28] = (*c++ & 0x1) << 2;
318 xmc[28] |= (*c >> 6) & 0x3;
319 xmc[29] = (*c >> 3) & 0x7;
320 xmc[30] = *c++ & 0x7;
321 xmc[31] = (*c >> 5) & 0x7;
322 xmc[32] = (*c >> 2) & 0x7;
323 xmc[33] = (*c++ & 0x3) << 1;
324 xmc[33] |= (*c >> 7) & 0x1;
325 xmc[34] = (*c >> 4) & 0x7;
326 xmc[35] = (*c >> 1) & 0x7;
327 xmc[36] = (*c++ & 0x1) << 2;
328 xmc[36] |= (*c >> 6) & 0x3;
329 xmc[37] = (*c >> 3) & 0x7;
330 xmc[38] = *c++ & 0x7;
331 Nc[3] = (*c >> 1) & 0x7F;
332 bc[3] = (*c++ & 0x1) << 1;
333 bc[3] |= (*c >> 7) & 0x1;
334 Mc[3] = (*c >> 5) & 0x3;
335 xmaxc[3] = (*c++ & 0x1F) << 1;
336 xmaxc[3] |= (*c >> 7) & 0x1;
337 xmc[39] = (*c >> 4) & 0x7;
338 xmc[40] = (*c >> 1) & 0x7;
339 xmc[41] = (*c++ & 0x1) << 2;
340 xmc[41] |= (*c >> 6) & 0x3;
341 xmc[42] = (*c >> 3) & 0x7;
342 xmc[43] = *c++ & 0x7; /* 30 */
343 xmc[44] = (*c >> 5) & 0x7;
344 xmc[45] = (*c >> 2) & 0x7;
345 xmc[46] = (*c++ & 0x3) << 1;
346 xmc[46] |= (*c >> 7) & 0x1;
347 xmc[47] = (*c >> 4) & 0x7;
348 xmc[48] = (*c >> 1) & 0x7;
349 xmc[49] = (*c++ & 0x1) << 2;
350 xmc[49] |= (*c >> 6) & 0x3;
351 xmc[50] = (*c >> 3) & 0x7;
352 xmc[51] = *c & 0x7; /* 33 */
353 }
354
355 Gsm_Decoder(s, LARc, Nc, bc, Mc, xmaxc, xmc, target);
356
357 return 0;
358}
359