src/output/analog.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <math.h>
  24 #include <glib.h>
  25 #include <libsigrok/libsigrok.h>
  26 #include "libsigrok-internal.h"
  27
  28 #define LOG_PREFIX "output/analog"
  29
  30 struct context {
  31         int num_enabled_channels;
  32         GPtrArray *channellist;
  33         int digits;
  34         float *fdata;
  35 };
  36
  37 enum {
  38         DIGITS_ALL,
  39         DIGITS_SPEC,
  40 };
  41
  42 static int init(struct sr_output *o, GHashTable *options)
  43 {
  44         struct context *ctx;
  45         struct sr_channel *ch;
  46         GSList *l;
  47         const char *s;
  48
  49         if (!o || !o->sdi)
  50                 return SR_ERR_ARG;
  51
  52         o->priv = ctx = g_malloc0(sizeof(struct context));
  53         s = g_variant_get_string(g_hash_table_lookup(options, "digits"), NULL);
  54         if (!strcmp(s, "all"))
  55                 ctx->digits = DIGITS_ALL;
  56         else
  57                 ctx->digits = DIGITS_SPEC;
  58
  59         /* Get the number of channels and their names. */
  60         ctx->channellist = g_ptr_array_new();
  61         for (l = o->sdi->channels; l; l = l->next) {
  62                 ch = l->data;
  63                 if (!ch || !ch->enabled)
  64                         continue;
  65                 g_ptr_array_add(ctx->channellist, ch->name);
  66                 ctx->num_enabled_channels++;
  67         }
  68         ctx->fdata = NULL;
  69
  70         return SR_OK;
  71 }
  72
  73 static void si_printf(float value, GString *out, const char *unitstr)
  74 {
  75         float v;
  76
  77         if (signbit(value))
  78                 v = -(value);
  79         else
  80                 v = value;
  81
  82         if (v < 1e-12 || v > 1e+12)
  83                 g_string_append_printf(out, "%f %s", value, unitstr);
  84         else if (v > 1e+9)
  85                 g_string_append_printf(out, "%f G%s", value / 1e+9, unitstr);
  86         else if (v > 1e+6)
  87                 g_string_append_printf(out, "%f M%s", value / 1e+6, unitstr);
  88         else if (v > 1e+3)
  89                 g_string_append_printf(out, "%f k%s", value / 1e+3, unitstr);
  90         else if (v < 1e-9)
  91                 g_string_append_printf(out, "%f n%s", value * 1e+9, unitstr);
  92         else if (v < 1e-6)
  93                 g_string_append_printf(out, "%f u%s", value * 1e+6, unitstr);
  94         else if (v < 1e-3)
  95                 g_string_append_printf(out, "%f m%s", value * 1e+3, unitstr);
  96         else
  97                 g_string_append_printf(out, "%f %s", value, unitstr);
  98
  99 }
 100
 101 /* Please use the same order as in enum sr_unit (libsigrok.h). */
 102 static void fancyprint(int unit, int mqflags, float value, GString *out)
 103 {
 104         switch (unit) {
 105         case SR_UNIT_VOLT:
 106                 si_printf(value, out, "V");
 107                 break;
 108         case SR_UNIT_AMPERE:
 109                 si_printf(value, out, "A");
 110                 break;
 111         case SR_UNIT_OHM:
 112                 si_printf(value, out, "");
 113                 g_string_append_unichar(out, 0x2126);
 114                 break;
 115         case SR_UNIT_FARAD:
 116                 si_printf(value, out, "F");
 117                 break;
 118         case SR_UNIT_KELVIN:
 119                 si_printf(value, out, "K");
 120                 break;
 121         case SR_UNIT_CELSIUS:
 122                 si_printf(value, out, "");
 123                 g_string_append_unichar(out, 0x00b0);
 124                 g_string_append_c(out, 'C');
 125                 break;
 126         case SR_UNIT_FAHRENHEIT:
 127                 si_printf(value, out, "");
 128                 g_string_append_unichar(out, 0x00b0);
 129                 g_string_append_c(out, 'F');
 130                 break;
 131         case SR_UNIT_HERTZ:
 132                 si_printf(value, out, "Hz");
 133                 break;
 134         case SR_UNIT_PERCENTAGE:
 135                 g_string_append_printf(out, "%f %%", value);
 136                 break;
 137         case SR_UNIT_BOOLEAN:
 138                 if (value > 0)
 139                         g_string_append_printf(out, "TRUE");
 140                 else
 141                         g_string_append_printf(out, "FALSE");
 142                 break;
 143         case SR_UNIT_SECOND:
 144                 si_printf(value, out, "s");
 145                 break;
 146         case SR_UNIT_SIEMENS:
 147                 si_printf(value, out, "S");
 148                 break;
 149         case SR_UNIT_DECIBEL_MW:
 150                 si_printf(value, out, "dBu");
 151                 break;
 152         case SR_UNIT_DECIBEL_VOLT:
 153                 si_printf(value, out, "dBV");
 154                 break;
 155         case SR_UNIT_UNITLESS:
 156                 si_printf(value, out, "");
 157                 break;
 158         case SR_UNIT_DECIBEL_SPL:
 159                 if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 160                         si_printf(value, out, "dB(A)");
 161                 else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_C)
 162                         si_printf(value, out, "dB(C)");
 163                 else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_Z)
 164                         si_printf(value, out, "dB(Z)");
 165                 else
 166                         /* No frequency weighting, or non-standard "flat" */
 167                         si_printf(value, out, "dB(SPL)");
 168                 if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_S)
 169                         g_string_append(out, " S");
 170                 else if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
 171                         g_string_append(out, " F");
 172                 if (mqflags & SR_MQFLAG_SPL_LAT)
 173                         g_string_append(out, " LAT");
 174                 else if (mqflags & SR_MQFLAG_SPL_PCT_OVER_ALARM)
 175                         /* Not a standard function for SLMs, so this is
 176                          * a made-up notation. */
 177                         g_string_append(out, " %oA");
 178                 break;
 179         case SR_UNIT_CONCENTRATION:
 180                 g_string_append_printf(out, "%f ppm", value * (1000 * 1000));
 181                 break;
 182         case SR_UNIT_REVOLUTIONS_PER_MINUTE:
 183                 si_printf(value, out, "RPM");
 184                 break;
 185         case SR_UNIT_VOLT_AMPERE:
 186                 si_printf(value, out, "VA");
 187                 break;
 188         case SR_UNIT_WATT:
 189                 si_printf(value, out, "W");
 190                 break;
 191         case SR_UNIT_WATT_HOUR:
 192                 si_printf(value, out, "Wh");
 193                 break;
 194         case SR_UNIT_METER_SECOND:
 195                 si_printf(value, out, "m/s");
 196                 break;
 197         case SR_UNIT_HECTOPASCAL:
 198                 si_printf(value, out, "hPa");
 199                 break;
 200         case SR_UNIT_HUMIDITY_293K:
 201                 si_printf(value, out, "%rF");
 202                 break;
 203         case SR_UNIT_DEGREE:
 204                 si_printf(value, out, "");
 205                 g_string_append_unichar(out, 0x00b0);
 206                 break;
 207         case SR_UNIT_HENRY:
 208                 si_printf(value, out, "H");
 209                 break;
 210         case SR_UNIT_GRAM:
 211                 si_printf(value, out, "g");
 212                 break;
 213         case SR_UNIT_CARAT:
 214                 si_printf(value, out, "ct");
 215                 break;
 216         case SR_UNIT_OUNCE:
 217                 si_printf(value, out, "oz");
 218                 break;
 219         case SR_UNIT_TROY_OUNCE:
 220                 si_printf(value, out, "oz t");
 221                 break;
 222         case SR_UNIT_POUND:
 223                 si_printf(value, out, "lb");
 224                 break;
 225         case SR_UNIT_PENNYWEIGHT:
 226                 si_printf(value, out, "dwt");
 227                 break;
 228         case SR_UNIT_GRAIN:
 229                 si_printf(value, out, "gr");
 230                 break;
 231         case SR_UNIT_TAEL:
 232                 si_printf(value, out, "tael");
 233                 break;
 234         case SR_UNIT_MOMME:
 235                 si_printf(value, out, "momme");
 236                 break;
 237         case SR_UNIT_TOLA:
 238                 si_printf(value, out, "tola");
 239                 break;
 240         case SR_UNIT_PIECE:
 241                 si_printf(value, out, "pcs");
 242                 break;
 243         default:
 244                 si_printf(value, out, "");
 245                 break;
 246         }
 247
 248         /* Please use the same order as in enum sr_mqflag (libsigrok.h). */
 249         if (mqflags & SR_MQFLAG_AC)
 250                 g_string_append_printf(out, " AC");
 251         if (mqflags & SR_MQFLAG_DC)
 252                 g_string_append_printf(out, " DC");
 253         if (mqflags & SR_MQFLAG_RMS)
 254                 g_string_append_printf(out, " RMS");
 255         if (mqflags & SR_MQFLAG_DIODE)
 256                 g_string_append_printf(out, " DIODE");
 257         if (mqflags & SR_MQFLAG_HOLD)
 258                 g_string_append_printf(out, " HOLD");
 259         if (mqflags & SR_MQFLAG_MAX)
 260                 g_string_append_printf(out, " MAX");
 261         if (mqflags & SR_MQFLAG_MIN)
 262                 g_string_append_printf(out, " MIN");
 263         if (mqflags & SR_MQFLAG_AUTORANGE)
 264                 g_string_append_printf(out, " AUTO");
 265         if (mqflags & SR_MQFLAG_RELATIVE)
 266                 g_string_append_printf(out, " REL");
 267         /* Note: SR_MQFLAG_SPL_* is handled above. */
 268         if (mqflags & SR_MQFLAG_DURATION)
 269                 g_string_append_printf(out, " DURATION");
 270         if (mqflags & SR_MQFLAG_AVG)
 271                 g_string_append_printf(out, " AVG");
 272         if (mqflags & SR_MQFLAG_REFERENCE)
 273                 g_string_append_printf(out, " REF");
 274         if (mqflags & SR_MQFLAG_UNSTABLE)
 275                 g_string_append_printf(out, " UNSTABLE");
 276         if (mqflags & SR_MQFLAG_FOUR_WIRE)
 277                 g_string_append_printf(out, " 4-WIRE");
 278         g_string_append_c(out, '\n');
 279 }
 280
 281 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
 282                 GString **out)
 283 {
 284         struct context *ctx;
 285         const struct sr_datafeed_analog *analog;
 286         struct sr_channel *ch;
 287         GSList *l;
 288         float *fdata;
 289         unsigned int i;
 290         int num_channels, c, ret, digits;
 291         char *number, *suffix;
 292
 293         *out = NULL;
 294         if (!o || !o->sdi)
 295                 return SR_ERR_ARG;
 296         ctx = o->priv;
 297
 298         switch (packet->type) {
 299         case SR_DF_FRAME_BEGIN:
 300                 *out = g_string_new("FRAME-BEGIN\n");
 301                 break;
 302         case SR_DF_FRAME_END:
 303                 *out = g_string_new("FRAME-END\n");
 304                 break;
 305         case SR_DF_ANALOG:
 306                 analog = packet->payload;
 307                 num_channels = g_slist_length(analog->meaning->channels);
 308                 if (!(fdata = g_try_realloc(ctx->fdata,
 309                                                 analog->num_samples * num_channels * sizeof(float))))
 310                         return SR_ERR_MALLOC;
 311                 ctx->fdata = fdata;
 312                 if ((ret = sr_analog_to_float(analog, fdata)) != SR_OK)
 313                         return ret;
 314                 *out = g_string_sized_new(512);
 315                 if (analog->encoding->is_digits_decimal) {
 316                         if (ctx->digits == DIGITS_ALL)
 317                                 digits = analog->encoding->digits;
 318                         else
 319                                 digits = analog->spec->spec_digits;
 320                 } else {
 321                         /* TODO we don't know how to print by number of bits yet. */
 322                         digits = 6;
 323                 }
 324                 sr_analog_unit_to_string(analog, &suffix);
 325                 for (i = 0; i < analog->num_samples; i++) {
 326                         for (l = analog->meaning->channels, c = 0; l; l = l->next, c++) {
 327                                 ch = l->data;
 328                                 g_string_append_printf(*out, "%s: ", ch->name);
 329                                 number = g_strdup_printf("%.*f", digits,
 330                                                 fdata[i * num_channels + c]);
 331                                 g_string_append(*out, number);
 332                                 g_free(number);
 333                                 g_string_append(*out, " ");
 334                                 g_string_append(*out, suffix);
 335                                 g_string_append(*out, "\n");
 336                         }
 337                 }
 338                 g_free(suffix);
 339                 break;
 340         }
 341
 342         return SR_OK;
 343 }
 344
 345 static struct sr_option options[] = {
 346         { "digits", "Digits", "Digits to show", NULL, NULL },
 347         ALL_ZERO
 348 };
 349
 350 static const struct sr_option *get_options(void)
 351 {
 352         if (!options[0].def) {
 353                 options[0].def = g_variant_ref_sink(g_variant_new_string("all"));
 354                 options[0].values = g_slist_append(options[0].values,
 355                                 g_variant_ref_sink(g_variant_new_string("all")));
 356                 options[0].values = g_slist_append(options[0].values,
 357                                 g_variant_ref_sink(g_variant_new_string("spec")));
 358         }
 359
 360         return options;
 361 }
 362
 363 static int cleanup(struct sr_output *o)
 364 {
 365         struct context *ctx;
 366
 367         if (!o || !o->sdi)
 368                 return SR_ERR_ARG;
 369         ctx = o->priv;
 370
 371         g_ptr_array_free(ctx->channellist, 1);
 372         g_variant_unref(options[0].def);
 373         g_slist_free_full(options[0].values, (GDestroyNotify)g_variant_unref);
 374         g_free(ctx->fdata);
 375         g_free(ctx);
 376         o->priv = NULL;
 377
 378         return SR_OK;
 379 }
 380
 381 SR_PRIV struct sr_output_module output_analog = {
 382         .id = "analog",
 383         .name = "Analog",
 384         .desc = "Analog data and types",
 385         .exts = NULL,
 386         .flags = 0,
 387         .options = get_options,
 388         .init = init,
 389         .receive = receive,
 390         .cleanup = cleanup
 391 };