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 <stdlib.h>
  21 #include <string.h>
  22 #include <math.h>
  23 #include <glib.h>
  24 #include <libsigrok/libsigrok.h>
  25 #include "libsigrok-internal.h"
  26
  27 #define LOG_PREFIX "output/analog"
  28
  29 struct context {
  30         int num_enabled_channels;
  31         GPtrArray *channellist;
  32         int digits;
  33 };
  34
  35 enum {
  36         DIGITS_ALL,
  37         DIGITS_SPEC,
  38 };
  39
  40 static int init(struct sr_output *o, GHashTable *options)
  41 {
  42         struct context *ctx;
  43         struct sr_channel *ch;
  44         GSList *l;
  45         const char *s;
  46
  47         if (!o || !o->sdi)
  48                 return SR_ERR_ARG;
  49
  50         o->priv = ctx = g_malloc0(sizeof(struct context));
  51         s = g_variant_get_string(g_hash_table_lookup(options, "digits"), NULL);
  52         if (!strcmp(s, "all"))
  53                 ctx->digits = DIGITS_ALL;
  54         else
  55                 ctx->digits = DIGITS_SPEC;
  56
  57         /* Get the number of channels and their names. */
  58         ctx->channellist = g_ptr_array_new();
  59         for (l = o->sdi->channels; l; l = l->next) {
  60                 ch = l->data;
  61                 if (!ch || !ch->enabled)
  62                         continue;
  63                 g_ptr_array_add(ctx->channellist, ch->name);
  64                 ctx->num_enabled_channels++;
  65         }
  66
  67         return SR_OK;
  68 }
  69
  70 static void si_printf(float value, GString *out, char *unitstr)
  71 {
  72         float v;
  73
  74         if (signbit(value))
  75                 v = -(value);
  76         else
  77                 v = value;
  78
  79         if (v < 1e-12 || v > 1e+12)
  80                 g_string_append_printf(out, "%f %s", value, unitstr);
  81         else if (v > 1e+9)
  82                 g_string_append_printf(out, "%f G%s", value / 1e+9, unitstr);
  83         else if (v > 1e+6)
  84                 g_string_append_printf(out, "%f M%s", value / 1e+6, unitstr);
  85         else if (v > 1e+3)
  86                 g_string_append_printf(out, "%f k%s", value / 1e+3, unitstr);
  87         else if (v < 1e-9)
  88                 g_string_append_printf(out, "%f n%s", value * 1e+9, unitstr);
  89         else if (v < 1e-6)
  90                 g_string_append_printf(out, "%f u%s", value * 1e+6, unitstr);
  91         else if (v < 1e-3)
  92                 g_string_append_printf(out, "%f m%s", value * 1e+3, unitstr);
  93         else
  94                 g_string_append_printf(out, "%f %s", value, unitstr);
  95
  96 }
  97
  98 static void fancyprint(int unit, int mqflags, float value, GString *out)
  99 {
 100         switch (unit) {
 101         case SR_UNIT_VOLT:
 102                 si_printf(value, out, "V");
 103                 break;
 104         case SR_UNIT_AMPERE:
 105                 si_printf(value, out, "A");
 106                 break;
 107         case SR_UNIT_OHM:
 108                 si_printf(value, out, "");
 109                 g_string_append_unichar(out, 0x2126);
 110                 break;
 111         case SR_UNIT_FARAD:
 112                 si_printf(value, out, "F");
 113                 break;
 114         case SR_UNIT_HENRY:
 115                 si_printf(value, out, "H");
 116                 break;
 117         case SR_UNIT_KELVIN:
 118                 si_printf(value, out, "K");
 119                 break;
 120         case SR_UNIT_CELSIUS:
 121                 si_printf(value, out, "");
 122                 g_string_append_unichar(out, 0x00b0);
 123                 g_string_append_c(out, 'C');
 124                 break;
 125         case SR_UNIT_FAHRENHEIT:
 126                 si_printf(value, out, "");
 127                 g_string_append_unichar(out, 0x00b0);
 128                 g_string_append_c(out, 'F');
 129                 break;
 130         case SR_UNIT_HERTZ:
 131                 si_printf(value, out, "Hz");
 132                 break;
 133         case SR_UNIT_PERCENTAGE:
 134                 g_string_append_printf(out, "%f %%", value);
 135                 break;
 136         case SR_UNIT_BOOLEAN:
 137                 if (value > 0)
 138                         g_string_append_printf(out, "TRUE");
 139                 else
 140                         g_string_append_printf(out, "FALSE");
 141                 break;
 142         case SR_UNIT_SECOND:
 143                 si_printf(value, out, "s");
 144                 break;
 145         case SR_UNIT_SIEMENS:
 146                 si_printf(value, out, "S");
 147                 break;
 148         case SR_UNIT_DECIBEL_MW:
 149                 si_printf(value, out, "dBu");
 150                 break;
 151         case SR_UNIT_DECIBEL_VOLT:
 152                 si_printf(value, out, "dBV");
 153                 break;
 154         case SR_UNIT_DECIBEL_SPL:
 155                 if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A)
 156                         si_printf(value, out, "dB(A)");
 157                 else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_C)
 158                         si_printf(value, out, "dB(C)");
 159                 else if (mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_Z)
 160                         si_printf(value, out, "dB(Z)");
 161                 else
 162                         /* No frequency weighting, or non-standard "flat" */
 163                         si_printf(value, out, "dB(SPL)");
 164                 if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_S)
 165                         g_string_append(out, " S");
 166                 else if (mqflags & SR_MQFLAG_SPL_TIME_WEIGHT_F)
 167                         g_string_append(out, " F");
 168                 if (mqflags & SR_MQFLAG_SPL_LAT)
 169                         g_string_append(out, " LAT");
 170                 else if (mqflags & SR_MQFLAG_SPL_PCT_OVER_ALARM)
 171                         /* Not a standard function for SLMs, so this is
 172                          * a made-up notation. */
 173                         g_string_append(out, " %oA");
 174                 break;
 175         case SR_UNIT_CONCENTRATION:
 176                 g_string_append_printf(out, "%f ppm", value * (1000 * 1000));
 177                 break;
 178         case SR_UNIT_REVOLUTIONS_PER_MINUTE:
 179                 si_printf(value, out, "RPM");
 180                 break;
 181         case SR_UNIT_VOLT_AMPERE:
 182                 si_printf(value, out, "VA");
 183                 break;
 184         case SR_UNIT_WATT:
 185                 si_printf(value, out, "W");
 186                 break;
 187         case SR_UNIT_WATT_HOUR:
 188                 si_printf(value, out, "Wh");
 189                 break;
 190         case SR_UNIT_METER_SECOND:
 191                 si_printf(value, out, "m/s");
 192                 break;
 193         case SR_UNIT_HECTOPASCAL:
 194                 si_printf(value, out, "hPa");
 195                 break;
 196         case SR_UNIT_HUMIDITY_293K:
 197                 si_printf(value, out, "%rF");
 198                 break;
 199         case SR_UNIT_DEGREE:
 200                 si_printf(value, out, "");
 201                 g_string_append_unichar(out, 0x00b0);
 202                 break;
 203         default:
 204                 si_printf(value, out, "");
 205                 break;
 206         }
 207
 208         if (mqflags & SR_MQFLAG_AC)
 209                 g_string_append_printf(out, " AC");
 210         if (mqflags & SR_MQFLAG_DC)
 211                 g_string_append_printf(out, " DC");
 212         if (mqflags & SR_MQFLAG_RMS)
 213                 g_string_append_printf(out, " RMS");
 214         if (mqflags & SR_MQFLAG_DIODE)
 215                 g_string_append_printf(out, " DIODE");
 216         if (mqflags & SR_MQFLAG_HOLD)
 217                 g_string_append_printf(out, " HOLD");
 218         if (mqflags & SR_MQFLAG_MAX)
 219                 g_string_append_printf(out, " MAX");
 220         if (mqflags & SR_MQFLAG_MIN)
 221                 g_string_append_printf(out, " MIN");
 222         if (mqflags & SR_MQFLAG_AUTORANGE)
 223                 g_string_append_printf(out, " AUTO");
 224         if (mqflags & SR_MQFLAG_RELATIVE)
 225                 g_string_append_printf(out, " REL");
 226         if (mqflags & SR_MQFLAG_AVG)
 227                 g_string_append_printf(out, " AVG");
 228         if (mqflags & SR_MQFLAG_REFERENCE)
 229                 g_string_append_printf(out, " REF");
 230         g_string_append_c(out, '\n');
 231 }
 232
 233 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
 234                 GString **out)
 235 {
 236         struct context *ctx;
 237         const struct sr_datafeed_analog *analog;
 238         const struct sr_datafeed_analog2 *analog2;
 239         struct sr_channel *ch;
 240         GSList *l;
 241         float *fdata;
 242         unsigned int i;
 243         int num_channels, c, ret, si, digits;
 244         char *number, *suffix;
 245
 246         *out = NULL;
 247         if (!o || !o->sdi)
 248                 return SR_ERR_ARG;
 249         ctx = o->priv;
 250
 251         switch (packet->type) {
 252         case SR_DF_FRAME_BEGIN:
 253                 *out = g_string_new("FRAME-BEGIN\n");
 254                 break;
 255         case SR_DF_FRAME_END:
 256                 *out = g_string_new("FRAME-END\n");
 257                 break;
 258         case SR_DF_ANALOG:
 259                 analog = packet->payload;
 260                 fdata = (float *)analog->data;
 261                 *out = g_string_sized_new(512);
 262                 num_channels = g_slist_length(analog->channels);
 263                 for (si = 0; si < analog->num_samples; si++) {
 264                         for (l = analog->channels, c = 0; l; l = l->next, c++) {
 265                                 ch = l->data;
 266                                 g_string_append_printf(*out, "%s: ", ch->name);
 267                                 fancyprint(analog->unit, analog->mqflags,
 268                                                 fdata[si * num_channels + c], *out);
 269                         }
 270                 }
 271                 break;
 272         case SR_DF_ANALOG2:
 273                 analog2 = packet->payload;
 274                 if (!(fdata = g_try_malloc(analog2->num_samples * sizeof(float))))
 275                         return SR_ERR_MALLOC;
 276                 if ((ret = sr_analog_to_float(analog2, fdata)) != SR_OK)
 277                         return ret;
 278                 *out = g_string_sized_new(512);
 279                 if (analog2->encoding->is_digits_decimal) {
 280                         if (ctx->digits == DIGITS_ALL)
 281                                 digits = analog2->encoding->digits;
 282                         else
 283                                 digits = analog2->spec->spec_digits;
 284                 } else {
 285                         /* TODO we don't know how to print by number of bits yet. */
 286                         digits = 6;
 287                 }
 288                 sr_analog_unit_to_string(analog2, &suffix);
 289                 num_channels = g_slist_length(analog2->meaning->channels);
 290                 for (i = 0; i < analog2->num_samples; i++) {
 291                         for (l = analog2->meaning->channels, c = 0; l; l = l->next, c++) {
 292                                 ch = l->data;
 293                                 g_string_append_printf(*out, "%s: ", ch->name);
 294                                 sr_analog_float_to_string(fdata[i * num_channels + c],
 295                                                 digits, &number);
 296                                 g_string_append(*out, number);
 297                                 g_free(number);
 298                                 g_string_append(*out, " ");
 299                                 g_string_append(*out, suffix);
 300                                 g_string_append(*out, "\n");
 301                         }
 302                 }
 303                 g_free(suffix);
 304                 break;
 305         }
 306
 307         return SR_OK;
 308 }
 309
 310 static int cleanup(struct sr_output *o)
 311 {
 312         struct context *ctx;
 313
 314         if (!o || !o->sdi)
 315                 return SR_ERR_ARG;
 316         ctx = o->priv;
 317
 318         g_ptr_array_free(ctx->channellist, 1);
 319         g_free(ctx);
 320         o->priv = NULL;
 321
 322         return SR_OK;
 323 }
 324
 325 static struct sr_option options[] = {
 326         { "digits", "Digits", "Digits to show", NULL, NULL },
 327         ALL_ZERO
 328 };
 329
 330 static const struct sr_option *get_options(void)
 331 {
 332         if (!options[0].def) {
 333                 options[0].def = g_variant_ref_sink(g_variant_new_string("all"));
 334                 options[0].values = g_slist_append(options[0].values,
 335                                 g_variant_ref_sink(g_variant_new_string("all")));
 336                 options[0].values = g_slist_append(options[0].values,
 337                                 g_variant_ref_sink(g_variant_new_string("spec")));
 338         }
 339
 340         return options;
 341 }
 342
 343 SR_PRIV struct sr_output_module output_analog = {
 344         .id = "analog",
 345         .name = "Analog",
 346         .desc = "Analog data and types",
 347         .exts = NULL,
 348         .flags = 0,
 349         .options = get_options,
 350         .init = init,
 351         .receive = receive,
 352         .cleanup = cleanup
 353 };