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2504ba9f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d855497e | 2 | /* |
d855497e MI |
3 | * |
4 | * Copyright (C) 2005 Mike Isely <isely@pobox.com> | |
d855497e MI |
5 | */ |
6 | ||
7 | #include "pvrusb2-std.h" | |
8 | #include "pvrusb2-debug.h" | |
b2bbaa93 MI |
9 | #include <asm/string.h> |
10 | #include <linux/slab.h> | |
d855497e MI |
11 | |
12 | struct std_name { | |
13 | const char *name; | |
14 | v4l2_std_id id; | |
15 | }; | |
16 | ||
17 | ||
18 | #define CSTD_PAL \ | |
19 | (V4L2_STD_PAL_B| \ | |
20 | V4L2_STD_PAL_B1| \ | |
21 | V4L2_STD_PAL_G| \ | |
22 | V4L2_STD_PAL_H| \ | |
23 | V4L2_STD_PAL_I| \ | |
24 | V4L2_STD_PAL_D| \ | |
25 | V4L2_STD_PAL_D1| \ | |
26 | V4L2_STD_PAL_K| \ | |
27 | V4L2_STD_PAL_M| \ | |
28 | V4L2_STD_PAL_N| \ | |
29 | V4L2_STD_PAL_Nc| \ | |
30 | V4L2_STD_PAL_60) | |
31 | ||
32 | #define CSTD_NTSC \ | |
33 | (V4L2_STD_NTSC_M| \ | |
34 | V4L2_STD_NTSC_M_JP| \ | |
35 | V4L2_STD_NTSC_M_KR| \ | |
36 | V4L2_STD_NTSC_443) | |
37 | ||
9de982d3 MI |
38 | #define CSTD_ATSC \ |
39 | (V4L2_STD_ATSC_8_VSB| \ | |
40 | V4L2_STD_ATSC_16_VSB) | |
41 | ||
d855497e MI |
42 | #define CSTD_SECAM \ |
43 | (V4L2_STD_SECAM_B| \ | |
44 | V4L2_STD_SECAM_D| \ | |
45 | V4L2_STD_SECAM_G| \ | |
46 | V4L2_STD_SECAM_H| \ | |
47 | V4L2_STD_SECAM_K| \ | |
48 | V4L2_STD_SECAM_K1| \ | |
49 | V4L2_STD_SECAM_L| \ | |
50 | V4L2_STD_SECAM_LC) | |
51 | ||
52 | #define TSTD_B (V4L2_STD_PAL_B|V4L2_STD_SECAM_B) | |
53 | #define TSTD_B1 (V4L2_STD_PAL_B1) | |
54 | #define TSTD_D (V4L2_STD_PAL_D|V4L2_STD_SECAM_D) | |
55 | #define TSTD_D1 (V4L2_STD_PAL_D1) | |
56 | #define TSTD_G (V4L2_STD_PAL_G|V4L2_STD_SECAM_G) | |
57 | #define TSTD_H (V4L2_STD_PAL_H|V4L2_STD_SECAM_H) | |
58 | #define TSTD_I (V4L2_STD_PAL_I) | |
59 | #define TSTD_K (V4L2_STD_PAL_K|V4L2_STD_SECAM_K) | |
60 | #define TSTD_K1 (V4L2_STD_SECAM_K1) | |
61 | #define TSTD_L (V4L2_STD_SECAM_L) | |
62 | #define TSTD_M (V4L2_STD_PAL_M|V4L2_STD_NTSC_M) | |
63 | #define TSTD_N (V4L2_STD_PAL_N) | |
64 | #define TSTD_Nc (V4L2_STD_PAL_Nc) | |
65 | #define TSTD_60 (V4L2_STD_PAL_60) | |
66 | ||
ef7c3700 | 67 | #define CSTD_ALL (CSTD_PAL|CSTD_NTSC|CSTD_ATSC|CSTD_SECAM) |
d855497e MI |
68 | |
69 | /* Mapping of standard bits to color system */ | |
c5a69d57 | 70 | static const struct std_name std_groups[] = { |
d855497e MI |
71 | {"PAL",CSTD_PAL}, |
72 | {"NTSC",CSTD_NTSC}, | |
73 | {"SECAM",CSTD_SECAM}, | |
9de982d3 | 74 | {"ATSC",CSTD_ATSC}, |
d855497e MI |
75 | }; |
76 | ||
77 | /* Mapping of standard bits to modulation system */ | |
c5a69d57 | 78 | static const struct std_name std_items[] = { |
d855497e MI |
79 | {"B",TSTD_B}, |
80 | {"B1",TSTD_B1}, | |
81 | {"D",TSTD_D}, | |
82 | {"D1",TSTD_D1}, | |
83 | {"G",TSTD_G}, | |
84 | {"H",TSTD_H}, | |
85 | {"I",TSTD_I}, | |
86 | {"K",TSTD_K}, | |
87 | {"K1",TSTD_K1}, | |
88 | {"L",TSTD_L}, | |
89 | {"LC",V4L2_STD_SECAM_LC}, | |
90 | {"M",TSTD_M}, | |
91 | {"Mj",V4L2_STD_NTSC_M_JP}, | |
92 | {"443",V4L2_STD_NTSC_443}, | |
93 | {"Mk",V4L2_STD_NTSC_M_KR}, | |
94 | {"N",TSTD_N}, | |
95 | {"Nc",TSTD_Nc}, | |
96 | {"60",TSTD_60}, | |
9de982d3 MI |
97 | {"8VSB",V4L2_STD_ATSC_8_VSB}, |
98 | {"16VSB",V4L2_STD_ATSC_16_VSB}, | |
d855497e MI |
99 | }; |
100 | ||
101 | ||
102 | // Search an array of std_name structures and return a pointer to the | |
103 | // element with the matching name. | |
104 | static const struct std_name *find_std_name(const struct std_name *arrPtr, | |
105 | unsigned int arrSize, | |
106 | const char *bufPtr, | |
107 | unsigned int bufSize) | |
108 | { | |
109 | unsigned int idx; | |
110 | const struct std_name *p; | |
111 | for (idx = 0; idx < arrSize; idx++) { | |
112 | p = arrPtr + idx; | |
113 | if (strlen(p->name) != bufSize) continue; | |
114 | if (!memcmp(bufPtr,p->name,bufSize)) return p; | |
115 | } | |
a0fd1cb1 | 116 | return NULL; |
d855497e MI |
117 | } |
118 | ||
119 | ||
120 | int pvr2_std_str_to_id(v4l2_std_id *idPtr,const char *bufPtr, | |
121 | unsigned int bufSize) | |
122 | { | |
123 | v4l2_std_id id = 0; | |
124 | v4l2_std_id cmsk = 0; | |
125 | v4l2_std_id t; | |
126 | int mMode = 0; | |
127 | unsigned int cnt; | |
128 | char ch; | |
129 | const struct std_name *sp; | |
130 | ||
131 | while (bufSize) { | |
132 | if (!mMode) { | |
133 | cnt = 0; | |
134 | while ((cnt < bufSize) && (bufPtr[cnt] != '-')) cnt++; | |
135 | if (cnt >= bufSize) return 0; // No more characters | |
eca8ebfc AD |
136 | sp = find_std_name(std_groups, ARRAY_SIZE(std_groups), |
137 | bufPtr,cnt); | |
d855497e MI |
138 | if (!sp) return 0; // Illegal color system name |
139 | cnt++; | |
140 | bufPtr += cnt; | |
141 | bufSize -= cnt; | |
142 | mMode = !0; | |
143 | cmsk = sp->id; | |
144 | continue; | |
145 | } | |
146 | cnt = 0; | |
147 | while (cnt < bufSize) { | |
148 | ch = bufPtr[cnt]; | |
149 | if (ch == ';') { | |
150 | mMode = 0; | |
151 | break; | |
152 | } | |
153 | if (ch == '/') break; | |
154 | cnt++; | |
155 | } | |
eca8ebfc | 156 | sp = find_std_name(std_items, ARRAY_SIZE(std_items), |
d855497e MI |
157 | bufPtr,cnt); |
158 | if (!sp) return 0; // Illegal modulation system ID | |
159 | t = sp->id & cmsk; | |
160 | if (!t) return 0; // Specific color + modulation system illegal | |
161 | id |= t; | |
162 | if (cnt < bufSize) cnt++; | |
163 | bufPtr += cnt; | |
164 | bufSize -= cnt; | |
165 | } | |
166 | ||
167 | if (idPtr) *idPtr = id; | |
168 | return !0; | |
169 | } | |
170 | ||
171 | ||
172 | unsigned int pvr2_std_id_to_str(char *bufPtr, unsigned int bufSize, | |
173 | v4l2_std_id id) | |
174 | { | |
175 | unsigned int idx1,idx2; | |
176 | const struct std_name *ip,*gp; | |
177 | int gfl,cfl; | |
178 | unsigned int c1,c2; | |
179 | cfl = 0; | |
180 | c1 = 0; | |
eca8ebfc | 181 | for (idx1 = 0; idx1 < ARRAY_SIZE(std_groups); idx1++) { |
d855497e MI |
182 | gp = std_groups + idx1; |
183 | gfl = 0; | |
eca8ebfc | 184 | for (idx2 = 0; idx2 < ARRAY_SIZE(std_items); idx2++) { |
d855497e MI |
185 | ip = std_items + idx2; |
186 | if (!(gp->id & ip->id & id)) continue; | |
187 | if (!gfl) { | |
188 | if (cfl) { | |
189 | c2 = scnprintf(bufPtr,bufSize,";"); | |
190 | c1 += c2; | |
191 | bufSize -= c2; | |
192 | bufPtr += c2; | |
193 | } | |
194 | cfl = !0; | |
195 | c2 = scnprintf(bufPtr,bufSize, | |
196 | "%s-",gp->name); | |
197 | gfl = !0; | |
198 | } else { | |
199 | c2 = scnprintf(bufPtr,bufSize,"/"); | |
200 | } | |
201 | c1 += c2; | |
202 | bufSize -= c2; | |
203 | bufPtr += c2; | |
204 | c2 = scnprintf(bufPtr,bufSize, | |
205 | ip->name); | |
206 | c1 += c2; | |
207 | bufSize -= c2; | |
208 | bufPtr += c2; | |
209 | } | |
210 | } | |
211 | return c1; | |
212 | } | |
213 | ||
214 | ||
215 | // Template data for possible enumerated video standards. Here we group | |
216 | // standards which share common frame rates and resolution. | |
217 | static struct v4l2_standard generic_standards[] = { | |
218 | { | |
219 | .id = (TSTD_B|TSTD_B1| | |
220 | TSTD_D|TSTD_D1| | |
221 | TSTD_G| | |
222 | TSTD_H| | |
223 | TSTD_I| | |
224 | TSTD_K|TSTD_K1| | |
225 | TSTD_L| | |
226 | V4L2_STD_SECAM_LC | | |
227 | TSTD_N|TSTD_Nc), | |
228 | .frameperiod = | |
229 | { | |
230 | .numerator = 1, | |
231 | .denominator= 25 | |
232 | }, | |
233 | .framelines = 625, | |
234 | .reserved = {0,0,0,0} | |
235 | }, { | |
236 | .id = (TSTD_M| | |
237 | V4L2_STD_NTSC_M_JP| | |
238 | V4L2_STD_NTSC_M_KR), | |
239 | .frameperiod = | |
240 | { | |
241 | .numerator = 1001, | |
242 | .denominator= 30000 | |
243 | }, | |
244 | .framelines = 525, | |
245 | .reserved = {0,0,0,0} | |
246 | }, { // This is a total wild guess | |
247 | .id = (TSTD_60), | |
248 | .frameperiod = | |
249 | { | |
250 | .numerator = 1001, | |
251 | .denominator= 30000 | |
252 | }, | |
253 | .framelines = 525, | |
254 | .reserved = {0,0,0,0} | |
255 | }, { // This is total wild guess | |
256 | .id = V4L2_STD_NTSC_443, | |
257 | .frameperiod = | |
258 | { | |
259 | .numerator = 1001, | |
260 | .denominator= 30000 | |
261 | }, | |
262 | .framelines = 525, | |
263 | .reserved = {0,0,0,0} | |
264 | } | |
265 | }; | |
266 | ||
d855497e MI |
267 | static struct v4l2_standard *match_std(v4l2_std_id id) |
268 | { | |
269 | unsigned int idx; | |
92f6ed71 | 270 | for (idx = 0; idx < ARRAY_SIZE(generic_standards); idx++) { |
d855497e MI |
271 | if (generic_standards[idx].id & id) { |
272 | return generic_standards + idx; | |
273 | } | |
274 | } | |
a0fd1cb1 | 275 | return NULL; |
d855497e MI |
276 | } |
277 | ||
278 | static int pvr2_std_fill(struct v4l2_standard *std,v4l2_std_id id) | |
279 | { | |
280 | struct v4l2_standard *template; | |
281 | int idx; | |
282 | unsigned int bcnt; | |
283 | template = match_std(id); | |
284 | if (!template) return 0; | |
285 | idx = std->index; | |
286 | memcpy(std,template,sizeof(*template)); | |
287 | std->index = idx; | |
288 | std->id = id; | |
289 | bcnt = pvr2_std_id_to_str(std->name,sizeof(std->name)-1,id); | |
290 | std->name[bcnt] = 0; | |
56585386 | 291 | pvr2_trace(PVR2_TRACE_STD,"Set up standard idx=%u name=%s", |
d855497e MI |
292 | std->index,std->name); |
293 | return !0; | |
294 | } | |
295 | ||
296 | /* These are special cases of combined standards that we should enumerate | |
297 | separately if the component pieces are present. */ | |
298 | static v4l2_std_id std_mixes[] = { | |
299 | V4L2_STD_PAL_B | V4L2_STD_PAL_G, | |
300 | V4L2_STD_PAL_D | V4L2_STD_PAL_K, | |
301 | V4L2_STD_SECAM_B | V4L2_STD_SECAM_G, | |
302 | V4L2_STD_SECAM_D | V4L2_STD_SECAM_K, | |
303 | }; | |
304 | ||
305 | struct v4l2_standard *pvr2_std_create_enum(unsigned int *countptr, | |
306 | v4l2_std_id id) | |
307 | { | |
308 | unsigned int std_cnt = 0; | |
309 | unsigned int idx,bcnt,idx2; | |
310 | v4l2_std_id idmsk,cmsk,fmsk; | |
311 | struct v4l2_standard *stddefs; | |
312 | ||
56585386 | 313 | if (pvrusb2_debug & PVR2_TRACE_STD) { |
a00199fb | 314 | char buf[100]; |
d855497e MI |
315 | bcnt = pvr2_std_id_to_str(buf,sizeof(buf),id); |
316 | pvr2_trace( | |
56585386 | 317 | PVR2_TRACE_STD,"Mapping standards mask=0x%x (%.*s)", |
d855497e MI |
318 | (int)id,bcnt,buf); |
319 | } | |
320 | ||
321 | *countptr = 0; | |
322 | std_cnt = 0; | |
323 | fmsk = 0; | |
324 | for (idmsk = 1, cmsk = id; cmsk; idmsk <<= 1) { | |
325 | if (!(idmsk & cmsk)) continue; | |
326 | cmsk &= ~idmsk; | |
327 | if (match_std(idmsk)) { | |
328 | std_cnt++; | |
329 | continue; | |
330 | } | |
331 | fmsk |= idmsk; | |
332 | } | |
333 | ||
eca8ebfc | 334 | for (idx2 = 0; idx2 < ARRAY_SIZE(std_mixes); idx2++) { |
d855497e MI |
335 | if ((id & std_mixes[idx2]) == std_mixes[idx2]) std_cnt++; |
336 | } | |
337 | ||
ef7c3700 MI |
338 | /* Don't complain about ATSC standard values */ |
339 | fmsk &= ~CSTD_ATSC; | |
340 | ||
d855497e | 341 | if (fmsk) { |
a00199fb | 342 | char buf[100]; |
d855497e MI |
343 | bcnt = pvr2_std_id_to_str(buf,sizeof(buf),fmsk); |
344 | pvr2_trace( | |
345 | PVR2_TRACE_ERROR_LEGS, | |
1753c7c4 | 346 | "***WARNING*** Failed to classify the following standard(s): %.*s", |
d855497e MI |
347 | bcnt,buf); |
348 | } | |
349 | ||
56585386 | 350 | pvr2_trace(PVR2_TRACE_STD,"Setting up %u unique standard(s)", |
d855497e | 351 | std_cnt); |
a0fd1cb1 | 352 | if (!std_cnt) return NULL; // paranoia |
d855497e | 353 | |
6396bb22 | 354 | stddefs = kcalloc(std_cnt, sizeof(struct v4l2_standard), |
d855497e | 355 | GFP_KERNEL); |
0cff5937 DC |
356 | if (!stddefs) |
357 | return NULL; | |
358 | ||
359 | for (idx = 0; idx < std_cnt; idx++) | |
360 | stddefs[idx].index = idx; | |
d855497e MI |
361 | |
362 | idx = 0; | |
363 | ||
364 | /* Enumerate potential special cases */ | |
eca8ebfc AD |
365 | for (idx2 = 0; (idx2 < ARRAY_SIZE(std_mixes)) && (idx < std_cnt); |
366 | idx2++) { | |
d855497e MI |
367 | if (!(id & std_mixes[idx2])) continue; |
368 | if (pvr2_std_fill(stddefs+idx,std_mixes[idx2])) idx++; | |
369 | } | |
370 | /* Now enumerate individual pieces */ | |
371 | for (idmsk = 1, cmsk = id; cmsk && (idx < std_cnt); idmsk <<= 1) { | |
372 | if (!(idmsk & cmsk)) continue; | |
373 | cmsk &= ~idmsk; | |
374 | if (!pvr2_std_fill(stddefs+idx,idmsk)) continue; | |
375 | idx++; | |
376 | } | |
377 | ||
378 | *countptr = std_cnt; | |
379 | return stddefs; | |
380 | } | |
381 | ||
382 | v4l2_std_id pvr2_std_get_usable(void) | |
383 | { | |
384 | return CSTD_ALL; | |
385 | } |