1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * 4 * Copyright (C) 2005 Mike Isely <isely@pobox.com> 5 */ 6 7 #include "pvrusb2-std.h" 8 #include "pvrusb2-debug.h" 9 #include <asm/string.h> 10 #include <linux/slab.h> 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 38 #define CSTD_ATSC \ 39 (V4L2_STD_ATSC_8_VSB| \ 40 V4L2_STD_ATSC_16_VSB) 41 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 67 #define CSTD_ALL (CSTD_PAL|CSTD_NTSC|CSTD_ATSC|CSTD_SECAM) 68 69 /* Mapping of standard bits to color system */ 70 static const struct std_name std_groups[] = { 71 {"PAL",CSTD_PAL}, 72 {"NTSC",CSTD_NTSC}, 73 {"SECAM",CSTD_SECAM}, 74 {"ATSC",CSTD_ATSC}, 75 }; 76 77 /* Mapping of standard bits to modulation system */ 78 static const struct std_name std_items[] = { 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}, 97 {"8VSB",V4L2_STD_ATSC_8_VSB}, 98 {"16VSB",V4L2_STD_ATSC_16_VSB}, 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 } 116 return NULL; 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 136 sp = find_std_name(std_groups, ARRAY_SIZE(std_groups), 137 bufPtr,cnt); 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 } 156 sp = find_std_name(std_items, ARRAY_SIZE(std_items), 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; 181 for (idx1 = 0; idx1 < ARRAY_SIZE(std_groups); idx1++) { 182 gp = std_groups + idx1; 183 gfl = 0; 184 for (idx2 = 0; idx2 < ARRAY_SIZE(std_items); idx2++) { 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 v4l2_std_id pvr2_std_get_usable(void) 216 { 217 return CSTD_ALL; 218 } 219