makemodes.awk revision 1.4
1 # $NetBSD: makemodes.awk,v 1.4 2006/08/17 22:33:59 bjh21 Exp $ 2 3 # 4 # Copyright (c) 1998 The NetBSD Foundation, Inc. 5 # All rights reserved. 6 # 7 # This code is derived from software contributed to The NetBSD Foundation 8 # by Mark Brinicombe 9 # 10 # Redistribution and use in source and binary forms, with or without 11 # modification, are permitted provided that the following conditions 12 # are met: 13 # 1. Redistributions of source code must retain the above copyright 14 # notice, this list of conditions and the following disclaimer. 15 # 2. Redistributions in binary form must reproduce the above copyright 16 # notice, this list of conditions and the following disclaimer in the 17 # documentation and/or other materials provided with the distribution. 18 # 3. All advertising materials mentioning features or use of this software 19 # must display the following acknowledgement: 20 # This product includes software developed by the NetBSD 21 # Foundation, Inc. and its contributors. 22 # 4. Neither the name of The NetBSD Foundation nor the names of its 23 # contributors may be used to endorse or promote products derived 24 # from this software without specific prior written permission. 25 # 26 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 # POSSIBILITY OF SUCH DAMAGE. 37 # 38 39 # This parses a Acorn monitor definition file and constructs an array of 40 # parameters for each mode. 41 # Once the file has been parsed the list of modes is examined to find modes 42 # that match the mode specifications specified on the command line. 43 # The matching mode definitions are written to stdout in the form of a C file. 44 # Parsing information is written to stderr. 45 # 46 # 47 # Syntax for using this program 48 # 49 # awk -f makemodes.awk <MDF file> <mode spec> [<mode spec> ...] 50 # 51 # where <mode spec> is 52 # <x>,<y> 53 # <x>,<y>,<f> 54 # <x>,<y>,<c>,<f> 55 # 56 # Note: Spaces are NOT allowed in a mode specifier 57 # 58 # where x = x resolution 59 # y = y resolution 60 # f = frame rate 61 # c = colour depth (16, 256, 32768, 65536) 62 # 63 64 BEGIN { 65 # Number of modes parsed and valid in the modes array. 66 mode = 0; 67 68 # MDF file globals 69 monitor = ""; 70 dpms = 0; 71 72 # Non zero if we are translating a mode 73 translate = 0; 74 75 # ':' character is used to separate the tokens. 76 FS=":"; 77 78 # Note the real number of arguments and truncate ARGC so that only the first 79 # argument is used as a filename. 80 realargc = ARGC; 81 ARGC=2; 82 83 # Translation of sync_pol to videomode.flags 84 pol[0] = "HP|VP"; 85 pol[1] = "HN|VP"; 86 pol[2] = "HP|VN"; 87 pol[3] = "HN|VN"; 88 } 89 90 # MDF File format 91 /^file_format/ { 92 # Currently we only understand format 1 MDF files 93 if ($2 != 1) { 94 printf("Unrecognised MDF format (%d)\n", $2); 95 exit; 96 } 97 } 98 99 # Monitor name 100 /^monitor_title/ { 101 monitor = $2; 102 } 103 104 # Monitor DPMS state 105 /^DPMS_state/ { 106 dpms = $2; 107 } 108 109 # Start of mode definition 110 /^startmode/ { 111 translate = 1; 112 } 113 114 # End of mode definition 115 /^endmode/ { 116 translate = 0; 117 mode = mode + 1; 118 } 119 120 # The mode definition name (only valid within startmode/endmode section) 121 /^mode_name:/ { 122 if (!translate) 123 next; 124 modes[mode, 0] = $2; 125 next; 126 } 127 128 # The horizontal resolution (only valid within startmode/endmode section) 129 /^x_res:/ { 130 if (!translate) 131 next; 132 modes[mode, 1] = $2; 133 next; 134 } 135 136 # The vertical resolution (only valid within startmode/endmode section) 137 /^y_res:/ { 138 if (!translate) 139 next; 140 modes[mode, 2] = $2; 141 next; 142 } 143 144 # The pixel rate (only valid within startmode/endmode section) 145 /^pixel_rate:/ { 146 if (!translate) 147 next; 148 modes[mode, 3] = $2; 149 next; 150 } 151 152 # The horizontal timings (only valid within startmode/endmode section) 153 /^h_timings:/ { 154 if (!translate) 155 next; 156 modes[mode, 4] = $2; 157 next; 158 } 159 160 # The vertical timings (only valid within startmode/endmode section) 161 /^v_timings:/ { 162 if (!translate) 163 next; 164 modes[mode, 5] = $2; 165 next; 166 } 167 168 # The sync polarity (only valid within startmode/endmode section) 169 /^sync_pol:/ { 170 if (!translate) 171 next; 172 modes[mode, 6] = $2; 173 next; 174 } 175 176 END { 177 # 178 # Now generate the C file 179 # 180 181 # Create the file header 182 printf("/*\n"); 183 printf(" * MACHINE GENERATED: DO NOT EDIT\n"); 184 printf(" *\n"); 185 printf(" * Created from %s\n", FILENAME); 186 printf(" */\n\n"); 187 printf("#include <sys/types.h>\n"); 188 printf("#include <arm/iomd/vidc.h>\n\n"); 189 printf("const char *monitor = \"%s\";\n", monitor); 190 printf("const int dpms = %d;\n", dpms); 191 printf("#define HP VID_PHSYNC\n"); 192 printf("#define HN VID_NHSYNC\n"); 193 printf("#define VP VID_PVSYNC\n"); 194 printf("#define VN VID_NVSYNC\n"); 195 printf("\n"); 196 197 # Now define the modes array 198 printf("struct vidc_mode vidcmodes[] = {\n"); 199 200 # Loop round all the modespecs on the command line 201 for (res = 2; res < realargc; res = res + 1) { 202 pos = -1; 203 found = -1; 204 closest = 200; 205 206 # Report the mode specifier being processed 207 printf("%s ==> ", ARGV[res]) | "cat 1>&2"; 208 209 # Pull apart the modespec 210 args = split(ARGV[res], modespec, ","); 211 212 # We need at least 2 arguments 213 if (args < 2) { 214 printf("Invalid mode specifier\n") | "cat 1>&2"; 215 continue; 216 } 217 218 # If we only have x,y default c and f 219 if (args == 2) { 220 modespec[3] = 256; 221 modespec[4] = -1; 222 } 223 # If we have x,y,f default c and re-arrange. 224 if (args == 3) { 225 modespec[4] = modespec[3]; 226 modespec[3] = 256; 227 } 228 229 # Report the full mode specifier 230 printf("%d x %d x %d x %d : ", modespec[1], modespec[2], 231 modespec[3], modespec[4]) | "cat 1>&2"; 232 233 # Now loop round all the modes we parsed and find the matches 234 for (loop = 0; loop < mode; loop = loop + 1) { 235 # Match X & Y 236 if (modespec[1] != modes[loop, 1]) continue; 237 if (modespec[2] != modes[loop, 2]) continue; 238 239 # Split the horizontal and vertical timings 240 # This is needed for the frame rate calculation 241 ht = split(modes[loop, 4], htimings, ","); 242 if (ht != 6) continue; 243 vt = split(modes[loop, 5], vtimings, ","); 244 if (vt != 6) continue; 245 246 # Calculate the frame rate 247 fr = modes[loop, 3] / (htimings[1] + htimings[2] + \ 248 htimings[3] + htimings[4] + htimings[5] + \ 249 htimings[6]) / ( vtimings[1] + vtimings[2] + \ 250 vtimings[3] + vtimings[4] + vtimings[5] + \ 251 vtimings[6]); 252 fr = fr * 1000; 253 254 # Remember the frame rate 255 modes[loop, 7] = int(fr + 0.5); 256 257 # Create the internal version of the timings 258 modes[loop, "timings"] = \ 259 sprintf( \ 260 "{ %d, %d,%d,%d,%d, %d,%d,%d,%d, %s, \"%s\" }",\ 261 modes[loop, 3], htimings[4], \ 262 htimings[4] + htimings[5] + htimings[6], \ 263 htimings[4] + htimings[5] + htimings[6] + \ 264 htimings[1], \ 265 htimings[4] + htimings[5] + htimings[6] + \ 266 htimings[1] + htimings[2] + htimings[3], \ 267 vtimings[4], \ 268 vtimings[4] + vtimings[5] + vtimings[6], \ 269 vtimings[4] + vtimings[5] + vtimings[6] + \ 270 vtimings[1], \ 271 vtimings[4] + vtimings[5] + vtimings[6] + \ 272 vtimings[1] + vtimings[2] + vtimings[3], \ 273 pol[modes[loop, 6]], modes[loop, 0]); 274 275 # Report the frame rate 276 printf("%d ", modes[loop, 7]) | "cat 1>&2"; 277 278 # Is this the closest 279 if (closest > mod(modes[loop, 7] - modespec[4])) { 280 closest = mod(modes[loop, 7] - modespec[4]); 281 pos = loop; 282 } 283 284 # Do we have an exact match ? 285 if (modes[loop, 7] == modespec[4]) 286 found = pos; 287 } 288 289 # If no exact match use the nearest 290 if (found == -1) 291 found = pos; 292 293 # Did we find any sort of match ? 294 if (found == -1) { 295 printf("Cannot find mode") | "cat 1>&2"; 296 continue; 297 } 298 299 # Report the frame rate matched 300 printf("- %d", modes[found, 7]) | "cat 1>&2"; 301 302 # Output the mode as part of the mode definition array 303 printf("\t{ %s,\n\t %d, %d },\n", 304 modes[found, "timings"], cdepth(modespec[3]), 305 modes[found, 7]); 306 307 printf("\n") | "cat 1>&2"; 308 } 309 310 # Add a terminating entry and close the array. 311 printf("\t{ { 0 } }\n"); 312 printf("};\n"); 313 } 314 315 # 316 # cdepth() function 317 # 318 # This returns the colour depth as a power of 2 + 1 319 # 320 function cdepth(depth) { 321 if (depth == 16) 322 return 5; 323 if (depth == 256) 324 return 9; 325 if (depth == 32768) 326 return 16; 327 if (depth == 65536) 328 return 17; 329 return 9; 330 } 331 332 # 333 # Simple mod() function 334 # 335 function mod(a) { 336 if (a < 0) 337 return -a; 338 return a; 339 } 340
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