session.c

   1 /*
   2  * This file is part of the sigrok-cli project.
   3  *
   4  * Copyright (C) 2013 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 <glib.h>
  22 #include <glib/gstdio.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25 #include "sigrok-cli.h"
  26
  27 static uint64_t limit_samples = 0;
  28 static uint64_t limit_frames = 0;
  29
  30 #ifdef HAVE_SRD
  31 extern struct srd_session *srd_sess;
  32 #endif
  33
  34 static int set_limit_time(const struct sr_dev_inst *sdi)
  35 {
  36         GVariant *gvar;
  37         uint64_t time_msec;
  38         uint64_t samplerate;
  39         struct sr_dev_driver *driver;
  40
  41         driver = sr_dev_inst_driver_get(sdi);
  42
  43         if (!(time_msec = sr_parse_timestring(opt_time))) {
  44                 g_critical("Invalid time '%s'", opt_time);
  45                 return SR_ERR;
  46         }
  47
  48         if (sr_dev_config_capabilities_list(sdi, NULL, SR_CONF_LIMIT_MSEC)
  49                         & SR_CONF_SET) {
  50                 gvar = g_variant_new_uint64(time_msec);
  51                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_MSEC, gvar) != SR_OK) {
  52                         g_critical("Failed to configure time limit.");
  53                         return SR_ERR;
  54                 }
  55         } else if (sr_dev_config_capabilities_list(sdi, NULL, SR_CONF_SAMPLERATE)
  56                         & (SR_CONF_GET | SR_CONF_SET)) {
  57                 /* Convert to samples based on the samplerate. */
  58                 sr_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE, &gvar);
  59                 samplerate = g_variant_get_uint64(gvar);
  60                 g_variant_unref(gvar);
  61                 limit_samples = (samplerate) * time_msec / (uint64_t)1000;
  62                 if (limit_samples == 0) {
  63                         g_critical("Not enough time at this samplerate.");
  64                         return SR_ERR;
  65                 }
  66                 gvar = g_variant_new_uint64(limit_samples);
  67                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
  68                         g_critical("Failed to configure time-based sample limit.");
  69                         return SR_ERR;
  70                 }
  71         } else {
  72                 g_critical("This device does not support time limits.");
  73                 return SR_ERR;
  74         }
  75
  76         return SR_OK;
  77 }
  78
  79 const struct sr_output *setup_output_format(const struct sr_dev_inst *sdi, FILE **outfile)
  80 {
  81         const struct sr_output_module *omod;
  82         const struct sr_option **options;
  83         const struct sr_output *o;
  84         GHashTable *fmtargs, *fmtopts;
  85         char *fmtspec;
  86
  87         if (!opt_output_format) {
  88                 if (opt_output_file) {
  89                         opt_output_format = DEFAULT_OUTPUT_FORMAT_FILE;
  90                 } else {
  91                         opt_output_format = DEFAULT_OUTPUT_FORMAT_NOFILE;
  92                 }
  93         }
  94
  95         fmtargs = parse_generic_arg(opt_output_format, TRUE, NULL);
  96         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
  97         if (!fmtspec)
  98                 g_critical("Invalid output format.");
  99         if (!(omod = sr_output_find(fmtspec)))
 100                 g_critical("Unknown output module '%s'.", fmtspec);
 101         g_hash_table_remove(fmtargs, "sigrok_key");
 102         if ((options = sr_output_options_get(omod))) {
 103                 fmtopts = generic_arg_to_opt(options, fmtargs);
 104                 (void)warn_unknown_keys(options, fmtargs, NULL);
 105                 sr_output_options_free(options);
 106         } else {
 107                 fmtopts = NULL;
 108         }
 109         o = sr_output_new(omod, fmtopts, sdi, opt_output_file);
 110
 111         if (opt_output_file) {
 112                 if (!sr_output_test_flag(omod, SR_OUTPUT_INTERNAL_IO_HANDLING)) {
 113                         *outfile = g_fopen(opt_output_file, "wb");
 114                         if (!*outfile) {
 115                                 g_critical("Cannot write to output file '%s'.",
 116                                         opt_output_file);
 117                         }
 118                 } else {
 119                         *outfile = NULL;
 120                 }
 121         } else {
 122                 setup_binary_stdout();
 123                 *outfile = stdout;
 124         }
 125
 126         if (fmtopts)
 127                 g_hash_table_destroy(fmtopts);
 128         g_hash_table_destroy(fmtargs);
 129
 130         return o;
 131 }
 132
 133 const struct sr_transform *setup_transform_module(const struct sr_dev_inst *sdi)
 134 {
 135         const struct sr_transform_module *tmod;
 136         const struct sr_option **options;
 137         const struct sr_transform *t;
 138         GHashTable *fmtargs, *fmtopts;
 139         char *fmtspec;
 140
 141         fmtargs = parse_generic_arg(opt_transform_module, TRUE, NULL);
 142         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
 143         if (!fmtspec)
 144                 g_critical("Invalid transform module.");
 145         if (!(tmod = sr_transform_find(fmtspec)))
 146                 g_critical("Unknown transform module '%s'.", fmtspec);
 147         g_hash_table_remove(fmtargs, "sigrok_key");
 148         if ((options = sr_transform_options_get(tmod))) {
 149                 fmtopts = generic_arg_to_opt(options, fmtargs);
 150                 (void)warn_unknown_keys(options, fmtargs, NULL);
 151                 sr_transform_options_free(options);
 152         } else {
 153                 fmtopts = NULL;
 154         }
 155         t = sr_transform_new(tmod, fmtopts, sdi);
 156         if (fmtopts)
 157                 g_hash_table_destroy(fmtopts);
 158         g_hash_table_destroy(fmtargs);
 159
 160         return t;
 161 }
 162
 163 /* Get the input stream's list of channels and their types, once. */
 164 static void props_get_channels(struct df_arg_desc *args,
 165         const struct sr_dev_inst *sdi)
 166 {
 167         struct input_stream_props *props;
 168         GSList *l;
 169         const struct sr_channel *ch;
 170
 171         if (!args)
 172                 return;
 173         props = &args->props;
 174         if (props->channels)
 175                 return;
 176
 177         props->channels = g_slist_copy(sr_dev_inst_channels_get(sdi));
 178         if (!props->channels)
 179                 return;
 180         for (l = props->channels; l; l = l->next) {
 181                 ch = l->data;
 182                 if (!ch->enabled)
 183                         continue;
 184                 if (ch->type != SR_CHANNEL_ANALOG)
 185                         continue;
 186                 props->first_analog_channel = ch;
 187                 break;
 188         }
 189 }
 190
 191 static gboolean props_chk_1st_channel(struct df_arg_desc *args,
 192         const struct sr_datafeed_analog *analog)
 193 {
 194         struct sr_channel *ch;
 195
 196         if (!args || !analog || !analog->meaning)
 197                 return FALSE;
 198         ch = g_slist_nth_data(analog->meaning->channels, 0);
 199         if (!ch)
 200                 return FALSE;
 201         return ch == args->props.first_analog_channel;
 202 }
 203
 204 static void props_dump_details(struct df_arg_desc *args)
 205 {
 206         struct input_stream_props *props;
 207         size_t ch_count;
 208         GSList *l;
 209         const struct sr_channel *ch;
 210         const char *type;
 211
 212         if (!args)
 213                 return;
 214         props = &args->props;
 215         if (props->samplerate)
 216                 printf("Samplerate: %" PRIu64 "\n", props->samplerate);
 217         if (props->channels) {
 218                 ch_count = g_slist_length(props->channels);
 219                 printf("Channels: %zu\n", ch_count);
 220                 for (l = props->channels; l; l = l->next) {
 221                         ch = l->data;
 222                         if (ch->type == SR_CHANNEL_ANALOG)
 223                                 type = "analog";
 224                         else
 225                                 type = "logic";
 226                         printf("- %s: %s\n", ch->name, type);
 227                 }
 228         }
 229         if (props->unitsize)
 230                 printf("Logic unitsize: %zu\n", props->unitsize);
 231         if (props->sample_count_logic)
 232                 printf("Logic sample count: %" PRIu64 "\n", props->sample_count_logic);
 233         if (props->sample_count_analog)
 234                 printf("Analog sample count: %" PRIu64 "\n", props->sample_count_analog);
 235         if (props->frame_count)
 236                 printf("Frame count: %" PRIu64 "\n", props->frame_count);
 237         if (props->triggered)
 238                 printf("Trigger count: %" PRIu64 "\n", props->triggered);
 239 }
 240
 241 static void props_cleanup(struct df_arg_desc *args)
 242 {
 243         struct input_stream_props *props;
 244
 245         if (!args)
 246                 return;
 247         props = &args->props;
 248         g_slist_free(props->channels);
 249         props->channels = NULL;
 250         props->first_analog_channel = NULL;
 251 }
 252
 253 void datafeed_in(const struct sr_dev_inst *sdi,
 254                 const struct sr_datafeed_packet *packet, void *cb_data)
 255 {
 256         static const struct sr_output *o = NULL;
 257         static const struct sr_output *oa = NULL;
 258         static uint64_t rcvd_samples_logic = 0;
 259         static uint64_t rcvd_samples_analog = 0;
 260         static uint64_t samplerate = 0;
 261         static int triggered = 0;
 262         static FILE *outfile = NULL;
 263
 264         const struct sr_datafeed_meta *meta;
 265         const struct sr_datafeed_logic *logic;
 266         const struct sr_datafeed_analog *analog;
 267         struct df_arg_desc *df_arg;
 268         int do_props;
 269         struct input_stream_props *props;
 270         struct sr_session *session;
 271         struct sr_config *src;
 272         GSList *l;
 273         GString *out;
 274         GVariant *gvar;
 275         uint64_t end_sample;
 276         uint64_t input_len;
 277         struct sr_dev_driver *driver;
 278
 279         /* Avoid warnings when building without decoder support. */
 280         (void)session;
 281         (void)input_len;
 282
 283         driver = sr_dev_inst_driver_get(sdi);
 284
 285         /* Skip all packets before the first header. */
 286         if (packet->type != SR_DF_HEADER && !o)
 287                 return;
 288
 289         /* Prepare to either process data, or "just" gather properties. */
 290         df_arg = cb_data;
 291         session = df_arg->session;
 292         do_props = df_arg->do_props;
 293         props = &df_arg->props;
 294
 295         switch (packet->type) {
 296         case SR_DF_HEADER:
 297                 g_debug("cli: Received SR_DF_HEADER.");
 298                 if (maybe_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE,
 299                                 &gvar) == SR_OK) {
 300                         samplerate = g_variant_get_uint64(gvar);
 301                         g_variant_unref(gvar);
 302                 }
 303                 if (do_props) {
 304                         /* Setup variables for maximum code path re-use. */
 305                         o = (void *)-1;
 306                         limit_samples = 0;
 307                         /* Start collecting input stream properties. */
 308                         memset(props, 0, sizeof(*props));
 309                         props->samplerate = samplerate;
 310                         props_get_channels(df_arg, sdi);
 311                         break;
 312                 }
 313                 if (!(o = setup_output_format(sdi, &outfile)))
 314                         g_critical("Failed to initialize output module.");
 315
 316                 /* Set up backup analog output module. */
 317                 if (outfile)
 318                         oa = sr_output_new(sr_output_find("analog"), NULL,
 319                                         sdi, NULL);
 320
 321                 rcvd_samples_logic = rcvd_samples_analog = 0;
 322
 323 #ifdef HAVE_SRD
 324                 if (opt_pds) {
 325                         if (samplerate) {
 326                                 if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 327                                                 g_variant_new_uint64(samplerate)) != SRD_OK) {
 328                                         g_critical("Failed to configure decode session.");
 329                                         break;
 330                                 }
 331                                 pd_samplerate = samplerate;
 332                         }
 333                         if (srd_session_start(srd_sess) != SRD_OK) {
 334                                 g_critical("Failed to start decode session.");
 335                                 break;
 336                         }
 337                 }
 338 #endif
 339                 break;
 340
 341         case SR_DF_META:
 342                 g_debug("cli: Received SR_DF_META.");
 343                 meta = packet->payload;
 344                 for (l = meta->config; l; l = l->next) {
 345                         src = l->data;
 346                         switch (src->key) {
 347                         case SR_CONF_SAMPLERATE:
 348                                 samplerate = g_variant_get_uint64(src->data);
 349                                 g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 350                                 if (do_props) {
 351                                         props->samplerate = samplerate;
 352                                         break;
 353                                 }
 354 #ifdef HAVE_SRD
 355                                 if (opt_pds) {
 356                                         if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 357                                                         g_variant_new_uint64(samplerate)) != SRD_OK) {
 358                                                 g_critical("Failed to pass samplerate to decoder.");
 359                                         }
 360                                         pd_samplerate = samplerate;
 361                                 }
 362 #endif
 363                                 break;
 364                         case SR_CONF_SAMPLE_INTERVAL:
 365                                 samplerate = g_variant_get_uint64(src->data);
 366                                 g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 367                                 if (do_props) {
 368                                         props->samplerate = samplerate;
 369                                         break;
 370                                 }
 371                                 break;
 372                         default:
 373                                 /* Unknown metadata is not an error. */
 374                                 break;
 375                         }
 376                 }
 377                 break;
 378
 379         case SR_DF_TRIGGER:
 380                 g_debug("cli: Received SR_DF_TRIGGER.");
 381                 if (do_props) {
 382                         props->triggered++;
 383                         break;
 384                 }
 385                 triggered = 1;
 386                 break;
 387
 388         case SR_DF_LOGIC:
 389                 logic = packet->payload;
 390                 g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
 391                                 logic->length, logic->unitsize);
 392                 if (logic->length == 0)
 393                         break;
 394
 395                 if (do_props) {
 396                         props_get_channels(df_arg, sdi);
 397                         props->unitsize = logic->unitsize;
 398                         props->sample_count_logic += logic->length / logic->unitsize;
 399                         break;
 400                 }
 401
 402                 /* Don't store any samples until triggered. */
 403                 if (opt_wait_trigger && !triggered)
 404                         break;
 405
 406                 if (limit_samples && rcvd_samples_logic >= limit_samples)
 407                         break;
 408
 409                 end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
 410                 /* Cut off last packet according to the sample limit. */
 411                 if (limit_samples && end_sample > limit_samples)
 412                         end_sample = limit_samples;
 413                 input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 414
 415                 if (opt_pds) {
 416 #ifdef HAVE_SRD
 417                         if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
 418                                         logic->data, input_len, logic->unitsize) != SRD_OK)
 419                                 sr_session_stop(session);
 420 #endif
 421                 }
 422
 423                 rcvd_samples_logic = end_sample;
 424                 break;
 425
 426         case SR_DF_ANALOG:
 427                 analog = packet->payload;
 428                 g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 429                 if (analog->num_samples == 0)
 430                         break;
 431
 432                 if (do_props) {
 433                         /* Only count the first analog channel. */
 434                         props_get_channels(df_arg, sdi);
 435                         if (!props_chk_1st_channel(df_arg, analog))
 436                                 break;
 437                         props->sample_count_analog += analog->num_samples;
 438                         break;
 439                 }
 440
 441                 if (limit_samples && rcvd_samples_analog >= limit_samples)
 442                         break;
 443
 444                 rcvd_samples_analog += analog->num_samples;
 445                 break;
 446
 447         case SR_DF_FRAME_BEGIN:
 448                 g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 449                 break;
 450
 451         case SR_DF_FRAME_END:
 452                 g_debug("cli: Received SR_DF_FRAME_END.");
 453                 if (do_props) {
 454                         props->frame_count++;
 455                         break;
 456                 }
 457                 break;
 458
 459         default:
 460                 break;
 461         }
 462
 463         if (!do_props && o && !opt_pds) {
 464                 if (sr_output_send(o, packet, &out) == SR_OK) {
 465                         if (oa && !out) {
 466                                 /*
 467                                  * The user didn't specify an output module,
 468                                  * but needs to see this analog data.
 469                                  */
 470                                 sr_output_send(oa, packet, &out);
 471                         }
 472                         if (outfile && out && out->len > 0) {
 473                                 fwrite(out->str, 1, out->len, outfile);
 474                                 fflush(outfile);
 475                         }
 476                         if (out)
 477                                 g_string_free(out, TRUE);
 478                 }
 479         }
 480
 481         /*
 482          * SR_DF_END needs to be handled after the output module's receive()
 483          * is called, so it can properly clean up that module.
 484          */
 485         if (packet->type == SR_DF_END) {
 486                 g_debug("cli: Received SR_DF_END.");
 487
 488 #if defined HAVE_SRD_SESSION_SEND_EOF && HAVE_SRD_SESSION_SEND_EOF
 489                 (void)srd_session_send_eof(srd_sess);
 490 #endif
 491
 492                 if (do_props) {
 493                         props_dump_details(df_arg);
 494                         props_cleanup(df_arg);
 495                         o = NULL;
 496                 }
 497
 498                 if (o)
 499                         sr_output_free(o);
 500                 o = NULL;
 501
 502                 if (oa)
 503                         sr_output_free(oa);
 504                 oa = NULL;
 505
 506                 if (outfile && outfile != stdout)
 507                         fclose(outfile);
 508
 509                 if (limit_samples) {
 510                         if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
 511                                 g_warning("Device only sent %" PRIu64 " samples.",
 512                                            rcvd_samples_logic);
 513                         else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
 514                                 g_warning("Device only sent %" PRIu64 " samples.",
 515                                            rcvd_samples_analog);
 516                 }
 517         }
 518
 519 }
 520
 521 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 522 {
 523         const struct sr_key_info *srci, *srmqi;
 524         double tmp_double, dlow, dhigh;
 525         uint64_t tmp_u64, p, q, low, high, mqflags;
 526         uint32_t mq;
 527         GVariant *rational[2], *range[2], *gtup[2];
 528         GVariantBuilder *vbl;
 529         gboolean tmp_bool;
 530         gchar **keyval;
 531         int ret, i;
 532
 533         if (!(srci = sr_key_info_name_get(SR_KEY_CONFIG, key))) {
 534                 g_critical("Unknown device option '%s'.", (char *) key);
 535                 return -1;
 536         }
 537         src->key = srci->key;
 538
 539         if ((!value || strlen(value) == 0) &&
 540                 (srci->datatype != SR_T_BOOL)) {
 541                 g_critical("Option '%s' needs a value.", (char *)key);
 542                 return -1;
 543         }
 544
 545         ret = 0;
 546         switch (srci->datatype) {
 547         case SR_T_UINT64:
 548                 ret = sr_parse_sizestring(value, &tmp_u64);
 549                 if (ret != 0)
 550                         break;
 551                 src->data = g_variant_new_uint64(tmp_u64);
 552                 break;
 553         case SR_T_INT32:
 554                 ret = sr_parse_sizestring(value, &tmp_u64);
 555                 if (ret != 0)
 556                         break;
 557                 src->data = g_variant_new_int32(tmp_u64);
 558                 break;
 559         case SR_T_STRING:
 560                 src->data = g_variant_new_string(value);
 561                 break;
 562         case SR_T_BOOL:
 563                 if (!value)
 564                         tmp_bool = TRUE;
 565                 else
 566                         tmp_bool = sr_parse_boolstring(value);
 567                 src->data = g_variant_new_boolean(tmp_bool);
 568                 break;
 569         case SR_T_FLOAT:
 570                 tmp_double = strtof(value, NULL);
 571                 src->data = g_variant_new_double(tmp_double);
 572                 break;
 573         case SR_T_RATIONAL_PERIOD:
 574                 if ((ret = sr_parse_period(value, &p, &q)) != SR_OK)
 575                         break;
 576                 rational[0] = g_variant_new_uint64(p);
 577                 rational[1] = g_variant_new_uint64(q);
 578                 src->data = g_variant_new_tuple(rational, 2);
 579                 break;
 580         case SR_T_RATIONAL_VOLT:
 581                 if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
 582                         break;
 583                 rational[0] = g_variant_new_uint64(p);
 584                 rational[1] = g_variant_new_uint64(q);
 585                 src->data = g_variant_new_tuple(rational, 2);
 586                 break;
 587         case SR_T_UINT64_RANGE:
 588                 if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
 589                         ret = -1;
 590                         break;
 591                 } else {
 592                         range[0] = g_variant_new_uint64(low);
 593                         range[1] = g_variant_new_uint64(high);
 594                         src->data = g_variant_new_tuple(range, 2);
 595                 }
 596                 break;
 597         case SR_T_DOUBLE_RANGE:
 598                 if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
 599                         ret = -1;
 600                         break;
 601                 } else {
 602                         range[0] = g_variant_new_double(dlow);
 603                         range[1] = g_variant_new_double(dhigh);
 604                         src->data = g_variant_new_tuple(range, 2);
 605                 }
 606                 break;
 607         case SR_T_KEYVALUE:
 608                 /* Expects the argument to be in the form of key=value. */
 609                 keyval = g_strsplit(value, "=", 2);
 610                 if (!keyval[0] || !keyval[1]) {
 611                         g_strfreev(keyval);
 612                         ret = -1;
 613                         break;
 614                 } else {
 615                         vbl = g_variant_builder_new(G_VARIANT_TYPE_DICTIONARY);
 616                         g_variant_builder_add(vbl, "{ss}",
 617                                               keyval[0], keyval[1]);
 618                         src->data = g_variant_builder_end(vbl);
 619                         g_strfreev(keyval);
 620                 }
 621                 break;
 622         case SR_T_MQ:
 623                 /*
 624                   Argument is MQ id e.g. ("voltage") optionally followed by one
 625                   or more /<mqflag> e.g. "/ac".
 626                  */
 627                 keyval = g_strsplit(value, "/", 0);
 628                 if (!keyval[0] || !(srmqi = sr_key_info_name_get(SR_KEY_MQ, keyval[0]))) {
 629                         g_strfreev(keyval);
 630                         ret = -1;
 631                         break;
 632                 }
 633                 mq = srmqi->key;
 634                 mqflags = 0;
 635                 for (i = 1; keyval[i]; i++) {
 636                         if (!(srmqi = sr_key_info_name_get(SR_KEY_MQFLAGS, keyval[i]))) {
 637                                 ret = -1;
 638                                 break;
 639                         }
 640                         mqflags |= srmqi->key;
 641                 }
 642                 g_strfreev(keyval);
 643                 if (ret != -1) {
 644                         gtup[0] = g_variant_new_uint32(mq);
 645                         gtup[1] = g_variant_new_uint64(mqflags);
 646                         src->data = g_variant_new_tuple(gtup, 2);
 647                 }
 648                 break;
 649         default:
 650                 g_critical("Unknown data type specified for option '%s' "
 651                            "(driver implementation bug?).", key);
 652                 ret = -1;
 653         }
 654
 655         if (ret < 0)
 656                 g_critical("Invalid value: '%s' for option '%s'", value, key);
 657
 658         return ret;
 659 }
 660
 661 int set_dev_options_array(struct sr_dev_inst *sdi, char **opts)
 662 {
 663         size_t opt_idx;
 664         const char *opt_text;
 665         GHashTable *args;
 666         int ret;
 667
 668         for (opt_idx = 0; opts && opts[opt_idx]; opt_idx++) {
 669                 opt_text = opts[opt_idx];
 670                 args = parse_generic_arg(opt_text, FALSE, "channel_group");
 671                 if (!args)
 672                         continue;
 673                 ret = set_dev_options(sdi, args);
 674                 g_hash_table_destroy(args);
 675                 if (ret != SR_OK)
 676                         return ret;
 677         }
 678
 679         return SR_OK;
 680 }
 681
 682 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 683 {
 684         struct sr_config src;
 685         const char *cg_name;
 686         struct sr_channel_group *cg;
 687         GHashTableIter iter;
 688         gpointer key, value;
 689         int ret;
 690
 691         /*
 692          * Not finding the 'sigrok_key' key (optional user specified
 693          * channel group name) in the current options group's hash table
 694          * is perfectly fine. In that case the -g selection is used,
 695          * which defaults to "the device" (global parameters).
 696          */
 697         cg_name = g_hash_table_lookup(args, "sigrok_key");
 698         cg = lookup_channel_group(sdi, cg_name);
 699
 700         g_hash_table_iter_init(&iter, args);
 701         while (g_hash_table_iter_next(&iter, &key, &value)) {
 702                 if (g_ascii_strcasecmp(key, "sigrok_key") == 0)
 703                         continue;
 704                 if ((ret = opt_to_gvar(key, value, &src)) != 0)
 705                         return ret;
 706                 if ((ret = maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, cg,
 707                                 src.key, src.data)) != SR_OK) {
 708                         g_critical("Failed to set device option '%s': %s.",
 709                                    (char *)key, sr_strerror(ret));
 710                         return ret;
 711                 }
 712         }
 713
 714         return SR_OK;
 715 }
 716
 717 void run_session(void)
 718 {
 719         struct df_arg_desc df_arg;
 720         GSList *devices, *real_devices, *sd;
 721         GVariant *gvar;
 722         struct sr_session *session;
 723         struct sr_trigger *trigger;
 724         struct sr_dev_inst *sdi;
 725         uint64_t min_samples, max_samples;
 726         GArray *drv_opts;
 727         guint i;
 728         int is_demo_dev;
 729         struct sr_dev_driver *driver;
 730         const struct sr_transform *t;
 731         GMainLoop *main_loop;
 732
 733         memset(&df_arg, 0, sizeof(df_arg));
 734         df_arg.do_props = FALSE;
 735
 736         devices = device_scan();
 737         if (!devices) {
 738                 g_critical("No devices found.");
 739                 return;
 740         }
 741
 742         real_devices = NULL;
 743         for (sd = devices; sd; sd = sd->next) {
 744                 sdi = sd->data;
 745
 746                 driver = sr_dev_inst_driver_get(sdi);
 747
 748                 if (!(drv_opts = sr_dev_options(driver, NULL, NULL))) {
 749                         g_critical("Failed to query list of driver options.");
 750                         return;
 751                 }
 752
 753                 is_demo_dev = 0;
 754                 for (i = 0; i < drv_opts->len; i++) {
 755                         if (g_array_index(drv_opts, uint32_t, i) == SR_CONF_DEMO_DEV)
 756                                 is_demo_dev = 1;
 757                 }
 758
 759                 g_array_free(drv_opts, TRUE);
 760
 761                 if (!is_demo_dev)
 762                         real_devices = g_slist_append(real_devices, sdi);
 763         }
 764
 765         if (g_slist_length(devices) > 1) {
 766                 if (g_slist_length(real_devices) != 1) {
 767                         g_critical("sigrok-cli only supports one device for capturing.");
 768                         return;
 769                 } else {
 770                         /* We only have one non-demo device. */
 771                         g_slist_free(devices);
 772                         devices = real_devices;
 773                         real_devices = NULL;
 774                 }
 775         }
 776
 777         /* This is unlikely to happen but it makes static analyzers stop complaining. */
 778         if (!devices) {
 779                 g_critical("No real devices found.");
 780                 return;
 781         }
 782
 783         sdi = devices->data;
 784         g_slist_free(devices);
 785         g_slist_free(real_devices);
 786
 787         sr_session_new(sr_ctx, &session);
 788         df_arg.session = session;
 789         sr_session_datafeed_callback_add(session, datafeed_in, &df_arg);
 790         df_arg.session = NULL;
 791
 792         if (sr_dev_open(sdi) != SR_OK) {
 793                 g_critical("Failed to open device.");
 794                 return;
 795         }
 796
 797         if (sr_session_dev_add(session, sdi) != SR_OK) {
 798                 g_critical("Failed to add device to session.");
 799                 sr_session_destroy(session);
 800                 return;
 801         }
 802
 803         if (opt_configs) {
 804                 if (set_dev_options_array(sdi, opt_configs) != SR_OK)
 805                         return;
 806         }
 807
 808         if (select_channels(sdi) != SR_OK) {
 809                 g_critical("Failed to set channels.");
 810                 sr_session_destroy(session);
 811                 return;
 812         }
 813
 814         trigger = NULL;
 815         if (opt_triggers) {
 816                 if (!parse_triggerstring(sdi, opt_triggers, &trigger)) {
 817                         sr_session_destroy(session);
 818                         return;
 819                 }
 820                 if (sr_session_trigger_set(session, trigger) != SR_OK) {
 821                         sr_session_destroy(session);
 822                         return;
 823                 }
 824         }
 825
 826         if (opt_continuous) {
 827                 if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
 828                         g_critical("This device does not support continuous sampling.");
 829                         sr_session_destroy(session);
 830                         return;
 831                 }
 832         }
 833
 834         if (opt_time) {
 835                 if (set_limit_time(sdi) != SR_OK) {
 836                         sr_session_destroy(session);
 837                         return;
 838                 }
 839         }
 840
 841         if (opt_samples) {
 842                 if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
 843                         g_critical("Invalid sample limit '%s'.", opt_samples);
 844                         sr_session_destroy(session);
 845                         return;
 846                 }
 847                 if (maybe_config_list(driver, sdi, NULL, SR_CONF_LIMIT_SAMPLES,
 848                                 &gvar) == SR_OK) {
 849                         /*
 850                          * The device has no compression, or compression is turned
 851                          * off, and publishes its sample memory size.
 852                          */
 853                         g_variant_get(gvar, "(tt)", &min_samples, &max_samples);
 854                         g_variant_unref(gvar);
 855                         if (limit_samples < min_samples) {
 856                                 g_critical("The device stores at least %"PRIu64
 857                                                 " samples with the current settings.", min_samples);
 858                         }
 859                         if (limit_samples > max_samples) {
 860                                 g_critical("The device can store only %"PRIu64
 861                                                 " samples with the current settings.", max_samples);
 862                         }
 863                 }
 864                 gvar = g_variant_new_uint64(limit_samples);
 865                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
 866                         g_critical("Failed to configure sample limit.");
 867                         sr_session_destroy(session);
 868                         return;
 869                 }
 870         }
 871
 872         if (opt_frames) {
 873                 if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
 874                         g_critical("Invalid frame limit '%s'.", opt_frames);
 875                         sr_session_destroy(session);
 876                         return;
 877                 }
 878                 gvar = g_variant_new_uint64(limit_frames);
 879                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
 880                         g_critical("Failed to configure frame limit.");
 881                         sr_session_destroy(session);
 882                         return;
 883                 }
 884         }
 885
 886         if (opt_transform_module) {
 887                 if (!(t = setup_transform_module(sdi)))
 888                         g_critical("Failed to initialize transform module.");
 889         }
 890
 891         main_loop = g_main_loop_new(NULL, FALSE);
 892
 893         sr_session_stopped_callback_set(session,
 894                 (sr_session_stopped_callback)g_main_loop_quit, main_loop);
 895
 896         if (sr_session_start(session) != SR_OK) {
 897                 g_critical("Failed to start session.");
 898                 g_main_loop_unref(main_loop);
 899                 sr_session_destroy(session);
 900                 return;
 901         }
 902
 903         if (opt_continuous)
 904                 add_anykey(session);
 905
 906         g_main_loop_run(main_loop);
 907
 908         if (opt_continuous)
 909                 clear_anykey();
 910
 911         if (trigger)
 912                 sr_trigger_free(trigger);
 913
 914         sr_session_datafeed_callback_remove_all(session);
 915         g_main_loop_unref(main_loop);
 916         sr_session_destroy(session);
 917 }