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 (config_key_has_cap(driver, sdi, NULL, SR_CONF_LIMIT_MSEC, SR_CONF_SET)) {
  49                 gvar = g_variant_new_uint64(time_msec);
  50                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_MSEC, gvar) != SR_OK) {
  51                         g_critical("Failed to configure time limit.");
  52                         return SR_ERR;
  53                 }
  54         } else if (config_key_has_cap(driver, sdi, NULL, SR_CONF_SAMPLERATE,
  55                         SR_CONF_GET | SR_CONF_SET)) {
  56                 /* Convert to samples based on the samplerate. */
  57                 sr_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE, &gvar);
  58                 samplerate = g_variant_get_uint64(gvar);
  59                 g_variant_unref(gvar);
  60                 limit_samples = (samplerate) * time_msec / (uint64_t)1000;
  61                 if (limit_samples == 0) {
  62                         g_critical("Not enough time at this samplerate.");
  63                         return SR_ERR;
  64                 }
  65                 gvar = g_variant_new_uint64(limit_samples);
  66                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
  67                         g_critical("Failed to configure time-based sample limit.");
  68                         return SR_ERR;
  69                 }
  70         } else {
  71                 g_critical("This device does not support time limits.");
  72                 return SR_ERR;
  73         }
  74
  75         return SR_OK;
  76 }
  77
  78 const struct sr_output *setup_output_format(const struct sr_dev_inst *sdi, FILE **outfile)
  79 {
  80         const struct sr_output_module *omod;
  81         const struct sr_option **options;
  82         const struct sr_output *o;
  83         GHashTable *fmtargs, *fmtopts;
  84         char *fmtspec;
  85
  86         if (!opt_output_format) {
  87                 if (opt_output_file) {
  88                         opt_output_format = DEFAULT_OUTPUT_FORMAT_FILE;
  89                 } else {
  90                         opt_output_format = DEFAULT_OUTPUT_FORMAT_NOFILE;
  91                 }
  92         }
  93
  94         fmtargs = parse_generic_arg(opt_output_format, TRUE);
  95         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
  96         if (!fmtspec)
  97                 g_critical("Invalid output format.");
  98         if (!(omod = sr_output_find(fmtspec)))
  99                 g_critical("Unknown output module '%s'.", fmtspec);
 100         g_hash_table_remove(fmtargs, "sigrok_key");
 101         if ((options = sr_output_options_get(omod))) {
 102                 fmtopts = generic_arg_to_opt(options, fmtargs);
 103                 sr_output_options_free(options);
 104         } else
 105                 fmtopts = NULL;
 106         o = sr_output_new(omod, fmtopts, sdi, opt_output_file);
 107
 108         if (opt_output_file) {
 109                 if (!sr_output_test_flag(omod, SR_OUTPUT_INTERNAL_IO_HANDLING))
 110                         *outfile = g_fopen(opt_output_file, "wb");
 111                 else
 112                         *outfile = NULL;
 113         } else {
 114                 *outfile = stdout;
 115         }
 116
 117         if (fmtopts)
 118                 g_hash_table_destroy(fmtopts);
 119         g_hash_table_destroy(fmtargs);
 120
 121         return o;
 122 }
 123
 124 const struct sr_transform *setup_transform_module(const struct sr_dev_inst *sdi)
 125 {
 126         const struct sr_transform_module *tmod;
 127         const struct sr_option **options;
 128         const struct sr_transform *t;
 129         GHashTable *fmtargs, *fmtopts;
 130         char *fmtspec;
 131
 132         if (!opt_transform_module)
 133                 opt_transform_module = "nop";
 134
 135         fmtargs = parse_generic_arg(opt_transform_module, TRUE);
 136         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
 137         if (!fmtspec)
 138                 g_critical("Invalid transform module.");
 139         if (!(tmod = sr_transform_find(fmtspec)))
 140                 g_critical("Unknown transform module '%s'.", fmtspec);
 141         g_hash_table_remove(fmtargs, "sigrok_key");
 142         if ((options = sr_transform_options_get(tmod))) {
 143                 fmtopts = generic_arg_to_opt(options, fmtargs);
 144                 sr_transform_options_free(options);
 145         } else
 146                 fmtopts = NULL;
 147         t = sr_transform_new(tmod, fmtopts, sdi);
 148         if (fmtopts)
 149                 g_hash_table_destroy(fmtopts);
 150         g_hash_table_destroy(fmtargs);
 151
 152         return t;
 153 }
 154
 155 void datafeed_in(const struct sr_dev_inst *sdi,
 156                 const struct sr_datafeed_packet *packet, void *cb_data)
 157 {
 158         const struct sr_datafeed_meta *meta;
 159         const struct sr_datafeed_logic *logic;
 160         const struct sr_datafeed_analog *analog;
 161         struct sr_session *session;
 162         struct sr_config *src;
 163         static const struct sr_output *o = NULL;
 164         static const struct sr_output *oa = NULL;
 165         static uint64_t rcvd_samples_logic = 0;
 166         static uint64_t rcvd_samples_analog = 0;
 167         static uint64_t samplerate = 0;
 168         static int triggered = 0;
 169         static FILE *outfile = NULL;
 170         GSList *l;
 171         GString *out;
 172         GVariant *gvar;
 173         uint64_t end_sample;
 174         uint64_t input_len;
 175         struct sr_dev_driver *driver;
 176
 177         driver = sr_dev_inst_driver_get(sdi);
 178
 179         /* If the first packet to come in isn't a header, don't even try. */
 180         if (packet->type != SR_DF_HEADER && !o)
 181                 return;
 182
 183         session = cb_data;
 184         switch (packet->type) {
 185         case SR_DF_HEADER:
 186                 g_debug("cli: Received SR_DF_HEADER.");
 187                 if (!(o = setup_output_format(sdi, &outfile)))
 188                         g_critical("Failed to initialize output module.");
 189
 190                 /* Set up backup analog output module. */
 191                 oa = sr_output_new(sr_output_find("analog"), NULL, sdi, NULL);
 192
 193                 rcvd_samples_logic = rcvd_samples_analog = 0;
 194
 195                 if (maybe_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE,
 196                                 &gvar) == SR_OK) {
 197                         samplerate = g_variant_get_uint64(gvar);
 198                         g_variant_unref(gvar);
 199                 }
 200
 201 #ifdef HAVE_SRD
 202                 if (opt_pds) {
 203                         if (samplerate) {
 204                                 if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 205                                                 g_variant_new_uint64(samplerate)) != SRD_OK) {
 206                                         g_critical("Failed to configure decode session.");
 207                                         break;
 208                                 }
 209                         }
 210                         if (srd_session_start(srd_sess) != SRD_OK) {
 211                                 g_critical("Failed to start decode session.");
 212                                 break;
 213                         }
 214                 }
 215 #endif
 216                 break;
 217
 218         case SR_DF_META:
 219                 g_debug("cli: Received SR_DF_META.");
 220                 meta = packet->payload;
 221                 for (l = meta->config; l; l = l->next) {
 222                         src = l->data;
 223                         switch (src->key) {
 224                         case SR_CONF_SAMPLERATE:
 225                                 samplerate = g_variant_get_uint64(src->data);
 226                                 g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 227 #ifdef HAVE_SRD
 228                                 if (opt_pds) {
 229                                         if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 230                                                         g_variant_new_uint64(samplerate)) != SRD_OK) {
 231                                                 g_critical("Failed to pass samplerate to decoder.");
 232                                         }
 233                                 }
 234 #endif
 235                                 break;
 236                         case SR_CONF_SAMPLE_INTERVAL:
 237                                 samplerate = g_variant_get_uint64(src->data);
 238                                 g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 239                                 break;
 240                         default:
 241                                 /* Unknown metadata is not an error. */
 242                                 break;
 243                         }
 244                 }
 245                 break;
 246
 247         case SR_DF_TRIGGER:
 248                 g_debug("cli: Received SR_DF_TRIGGER.");
 249                 triggered = 1;
 250                 break;
 251
 252         case SR_DF_LOGIC:
 253                 logic = packet->payload;
 254                 g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
 255                                 logic->length, logic->unitsize);
 256                 if (logic->length == 0)
 257                         break;
 258
 259                 /* Don't store any samples until triggered. */
 260                 if (opt_wait_trigger && !triggered)
 261                         break;
 262
 263                 if (limit_samples && rcvd_samples_logic >= limit_samples)
 264                         break;
 265
 266                 end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
 267                 /* Cut off last packet according to the sample limit. */
 268                 if (limit_samples && end_sample > limit_samples)
 269                         end_sample = limit_samples;
 270                 input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 271
 272                 if (opt_pds) {
 273 #ifdef HAVE_SRD
 274                         if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
 275                                         logic->data, input_len, logic->unitsize) != SRD_OK)
 276                                 sr_session_stop(session);
 277 #endif
 278                 }
 279
 280                 rcvd_samples_logic = end_sample;
 281                 break;
 282
 283         case SR_DF_ANALOG:
 284                 analog = packet->payload;
 285                 g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 286                 if (analog->num_samples == 0)
 287                         break;
 288
 289                 if (limit_samples && rcvd_samples_analog >= limit_samples)
 290                         break;
 291
 292                 rcvd_samples_analog += analog->num_samples;
 293                 break;
 294
 295         case SR_DF_FRAME_BEGIN:
 296                 g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 297                 break;
 298
 299         case SR_DF_FRAME_END:
 300                 g_debug("cli: Received SR_DF_FRAME_END.");
 301                 break;
 302
 303         default:
 304                 break;
 305         }
 306
 307         if (o && !opt_pds) {
 308                 if (sr_output_send(o, packet, &out) == SR_OK) {
 309                         if (!out || (out->len == 0
 310                                         && !opt_output_format
 311                                         && packet->type == SR_DF_ANALOG)) {
 312                                 /*
 313                                  * The user didn't specify an output module,
 314                                  * but needs to see this analog data.
 315                                  */
 316                                 sr_output_send(oa, packet, &out);
 317                         }
 318                         if (outfile && out && out->len > 0) {
 319                                 fwrite(out->str, 1, out->len, outfile);
 320                                 fflush(outfile);
 321                         }
 322                         if (out)
 323                                 g_string_free(out, TRUE);
 324                 }
 325         }
 326
 327         /*
 328          * SR_DF_END needs to be handled after the output module's receive()
 329          * is called, so it can properly clean up that module.
 330          */
 331         if (packet->type == SR_DF_END) {
 332                 g_debug("cli: Received SR_DF_END.");
 333
 334                 if (o)
 335                         sr_output_free(o);
 336                 o = NULL;
 337
 338                 sr_output_free(oa);
 339                 oa = NULL;
 340
 341                 if (outfile && outfile != stdout)
 342                         fclose(outfile);
 343
 344                 if (limit_samples) {
 345                         if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
 346                                 g_warning("Device only sent %" PRIu64 " samples.",
 347                                            rcvd_samples_logic);
 348                         else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
 349                                 g_warning("Device only sent %" PRIu64 " samples.",
 350                                            rcvd_samples_analog);
 351                 }
 352         }
 353
 354 }
 355
 356 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 357 {
 358         const struct sr_key_info *srci, *srmqi;
 359         double tmp_double, dlow, dhigh;
 360         uint64_t tmp_u64, p, q, low, high, mqflags;
 361         uint32_t mq;
 362         GVariant *rational[2], *range[2], *gtup[2];
 363         GVariantBuilder *vbl;
 364         gboolean tmp_bool;
 365         gchar **keyval;
 366         int ret, i;
 367
 368         if (!(srci = sr_key_info_name_get(SR_KEY_CONFIG, key))) {
 369                 g_critical("Unknown device option '%s'.", (char *) key);
 370                 return -1;
 371         }
 372         src->key = srci->key;
 373
 374         if ((!value || strlen(value) == 0) &&
 375                 (srci->datatype != SR_T_BOOL)) {
 376                 g_critical("Option '%s' needs a value.", (char *)key);
 377                 return -1;
 378         }
 379
 380         ret = 0;
 381         switch (srci->datatype) {
 382         case SR_T_UINT64:
 383                 ret = sr_parse_sizestring(value, &tmp_u64);
 384                 if (ret != 0)
 385                         break;
 386                 src->data = g_variant_new_uint64(tmp_u64);
 387                 break;
 388         case SR_T_INT32:
 389                 ret = sr_parse_sizestring(value, &tmp_u64);
 390                 if (ret != 0)
 391                         break;
 392                 src->data = g_variant_new_int32(tmp_u64);
 393                 break;
 394         case SR_T_STRING:
 395                 src->data = g_variant_new_string(value);
 396                 break;
 397         case SR_T_BOOL:
 398                 if (!value)
 399                         tmp_bool = TRUE;
 400                 else
 401                         tmp_bool = sr_parse_boolstring(value);
 402                 src->data = g_variant_new_boolean(tmp_bool);
 403                 break;
 404         case SR_T_FLOAT:
 405                 tmp_double = strtof(value, NULL);
 406                 src->data = g_variant_new_double(tmp_double);
 407                 break;
 408         case SR_T_RATIONAL_PERIOD:
 409                 if ((ret = sr_parse_period(value, &p, &q)) != SR_OK)
 410                         break;
 411                 rational[0] = g_variant_new_uint64(p);
 412                 rational[1] = g_variant_new_uint64(q);
 413                 src->data = g_variant_new_tuple(rational, 2);
 414                 break;
 415         case SR_T_RATIONAL_VOLT:
 416                 if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
 417                         break;
 418                 rational[0] = g_variant_new_uint64(p);
 419                 rational[1] = g_variant_new_uint64(q);
 420                 src->data = g_variant_new_tuple(rational, 2);
 421                 break;
 422         case SR_T_UINT64_RANGE:
 423                 if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
 424                         ret = -1;
 425                         break;
 426                 } else {
 427                         range[0] = g_variant_new_uint64(low);
 428                         range[1] = g_variant_new_uint64(high);
 429                         src->data = g_variant_new_tuple(range, 2);
 430                 }
 431                 break;
 432         case SR_T_DOUBLE_RANGE:
 433                 if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
 434                         ret = -1;
 435                         break;
 436                 } else {
 437                         range[0] = g_variant_new_double(dlow);
 438                         range[1] = g_variant_new_double(dhigh);
 439                         src->data = g_variant_new_tuple(range, 2);
 440                 }
 441                 break;
 442         case SR_T_KEYVALUE:
 443                 /* Expects the argument to be in the form of key=value. */
 444                 keyval = g_strsplit(value, "=", 2);
 445                 if (!keyval[0] || !keyval[1]) {
 446                         g_strfreev(keyval);
 447                         ret = -1;
 448                         break;
 449                 } else {
 450                         vbl = g_variant_builder_new(G_VARIANT_TYPE_DICTIONARY);
 451                         g_variant_builder_add(vbl, "{ss}",
 452                                               keyval[0], keyval[1]);
 453                         src->data = g_variant_builder_end(vbl);
 454                         g_strfreev(keyval);
 455                 }
 456                 break;
 457         case SR_T_MQ:
 458                 /*
 459                   Argument is MQ id e.g. ("voltage") optionally followed by one
 460                   or more /<mqflag> e.g. "/ac".
 461                  */
 462                 keyval = g_strsplit(value, "/", 0);
 463                 if (!keyval[0] || !(srmqi = sr_key_info_name_get(SR_KEY_MQ, keyval[0]))) {
 464                         g_strfreev(keyval);
 465                         ret = -1;
 466                         break;
 467                 }
 468                 mq = srmqi->key;
 469                 mqflags = 0;
 470                 for (i = 1; keyval[i]; i++) {
 471                         if (!(srmqi = sr_key_info_name_get(SR_KEY_MQFLAGS, keyval[i]))) {
 472                                 ret = -1;
 473                                 break;
 474                         }
 475                         mqflags |= srmqi->key;
 476                 }
 477                 g_strfreev(keyval);
 478                 if (ret != -1) {
 479                         gtup[0] = g_variant_new_uint32(mq);
 480                         gtup[1] = g_variant_new_uint64(mqflags);
 481                         src->data = g_variant_new_tuple(gtup, 2);
 482                 }
 483                 break;
 484         default:
 485                 g_critical("Unknown data type specified for option '%s' "
 486                            "(driver implementation bug?).", key);
 487                 ret = -1;
 488         }
 489
 490         if (ret < 0)
 491                 g_critical("Invalid value: '%s' for option '%s'", value, key);
 492
 493         return ret;
 494 }
 495
 496 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 497 {
 498         struct sr_config src;
 499         struct sr_channel_group *cg;
 500         GHashTableIter iter;
 501         gpointer key, value;
 502         int ret;
 503
 504         g_hash_table_iter_init(&iter, args);
 505         while (g_hash_table_iter_next(&iter, &key, &value)) {
 506                 if ((ret = opt_to_gvar(key, value, &src)) != 0)
 507                         return ret;
 508                 cg = select_channel_group(sdi);
 509                 if ((ret = maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, cg,
 510                                 src.key, src.data)) != SR_OK) {
 511                         g_critical("Failed to set device option '%s': %s.",
 512                                    (char *)key, sr_strerror(ret));
 513                         return ret;
 514                 }
 515         }
 516
 517         return SR_OK;
 518 }
 519
 520 void run_session(void)
 521 {
 522         GSList *devices, *real_devices, *sd;
 523         GHashTable *devargs;
 524         GVariant *gvar;
 525         struct sr_session *session;
 526         struct sr_trigger *trigger;
 527         struct sr_dev_inst *sdi;
 528         uint64_t min_samples, max_samples;
 529         gsize n_elements, i;
 530         const uint32_t *dev_opts;
 531         int is_demo_dev;
 532         struct sr_dev_driver *driver;
 533         const struct sr_transform *t;
 534
 535         devices = device_scan();
 536         if (!devices) {
 537                 g_critical("No devices found.");
 538                 return;
 539         }
 540
 541         real_devices = NULL;
 542         for (sd = devices; sd; sd = sd->next) {
 543                 sdi = sd->data;
 544
 545                 driver = sr_dev_inst_driver_get(sdi);
 546
 547                 if (sr_config_list(driver, sdi, NULL, SR_CONF_DEVICE_OPTIONS, &gvar) != SR_OK) {
 548                         g_critical("Failed to query list device options.");
 549                         return;
 550                 }
 551
 552                 dev_opts = g_variant_get_fixed_array(gvar, &n_elements, sizeof(uint32_t));
 553
 554                 is_demo_dev = 0;
 555                 for (i = 0; i < n_elements; i++) {
 556                         if (dev_opts[i] == SR_CONF_DEMO_DEV)
 557                                 is_demo_dev = 1;
 558                 }
 559
 560                 g_variant_unref(gvar);
 561
 562                 if (!is_demo_dev)
 563                         real_devices = g_slist_append(real_devices, sdi);
 564         }
 565
 566         if (g_slist_length(devices) > 1) {
 567                 if (g_slist_length(real_devices) != 1) {
 568                         g_critical("sigrok-cli only supports one device for capturing.");
 569                         return;
 570                 } else {
 571                         /* We only have one non-demo device. */
 572                         g_slist_free(devices);
 573                         devices = real_devices;
 574                         real_devices = NULL;
 575                 }
 576         }
 577
 578         sdi = devices->data;
 579         g_slist_free(devices);
 580         g_slist_free(real_devices);
 581
 582         sr_session_new(sr_ctx, &session);
 583         sr_session_datafeed_callback_add(session, datafeed_in, NULL);
 584
 585         if (sr_dev_open(sdi) != SR_OK) {
 586                 g_critical("Failed to open device.");
 587                 return;
 588         }
 589
 590         if (sr_session_dev_add(session, sdi) != SR_OK) {
 591                 g_critical("Failed to add device to session.");
 592                 sr_session_destroy(session);
 593                 return;
 594         }
 595
 596         if (opt_config) {
 597                 if ((devargs = parse_generic_arg(opt_config, FALSE))) {
 598                         if (set_dev_options(sdi, devargs) != SR_OK)
 599                                 return;
 600                         g_hash_table_destroy(devargs);
 601                 }
 602         }
 603
 604         if (select_channels(sdi) != SR_OK) {
 605                 g_critical("Failed to set channels.");
 606                 sr_session_destroy(session);
 607                 return;
 608         }
 609
 610         trigger = NULL;
 611         if (opt_triggers) {
 612                 if (!parse_triggerstring(sdi, opt_triggers, &trigger)) {
 613                         sr_session_destroy(session);
 614                         return;
 615                 }
 616                 if (sr_session_trigger_set(session, trigger) != SR_OK) {
 617                         sr_session_destroy(session);
 618                         return;
 619                 }
 620         }
 621
 622         if (opt_continuous) {
 623                 if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
 624                         g_critical("This device does not support continuous sampling.");
 625                         sr_session_destroy(session);
 626                         return;
 627                 }
 628         }
 629
 630         if (opt_time) {
 631                 if (set_limit_time(sdi) != SR_OK) {
 632                         sr_session_destroy(session);
 633                         return;
 634                 }
 635         }
 636
 637         if (opt_samples) {
 638                 if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
 639                         g_critical("Invalid sample limit '%s'.", opt_samples);
 640                         sr_session_destroy(session);
 641                         return;
 642                 }
 643                 if (maybe_config_list(driver, sdi, NULL, SR_CONF_LIMIT_SAMPLES,
 644                                 &gvar) == SR_OK) {
 645                         /*
 646                          * The device has no compression, or compression is turned
 647                          * off, and publishes its sample memory size.
 648                          */
 649                         g_variant_get(gvar, "(tt)", &min_samples, &max_samples);
 650                         g_variant_unref(gvar);
 651                         if (limit_samples < min_samples) {
 652                                 g_critical("The device stores at least %"PRIu64
 653                                                 " samples with the current settings.", min_samples);
 654                         }
 655                         if (limit_samples > max_samples) {
 656                                 g_critical("The device can store only %"PRIu64
 657                                                 " samples with the current settings.", max_samples);
 658                         }
 659                 }
 660                 gvar = g_variant_new_uint64(limit_samples);
 661                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
 662                         g_critical("Failed to configure sample limit.");
 663                         sr_session_destroy(session);
 664                         return;
 665                 }
 666         }
 667
 668         if (opt_frames) {
 669                 if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
 670                         g_critical("Invalid sample limit '%s'.", opt_samples);
 671                         sr_session_destroy(session);
 672                         return;
 673                 }
 674                 gvar = g_variant_new_uint64(limit_frames);
 675                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
 676                         g_critical("Failed to configure frame limit.");
 677                         sr_session_destroy(session);
 678                         return;
 679                 }
 680         }
 681
 682         if (!(t = setup_transform_module(sdi)))
 683                 g_critical("Failed to initialize transform module.");
 684
 685         if (sr_session_start(session) != SR_OK) {
 686                 g_critical("Failed to start session.");
 687                 sr_session_destroy(session);
 688                 return;
 689         }
 690
 691         if (opt_continuous)
 692                 add_anykey(session);
 693
 694         sr_session_run(session);
 695
 696         if (opt_continuous)
 697                 clear_anykey();
 698
 699         if (trigger)
 700                 sr_trigger_free(trigger);
 701
 702         sr_session_datafeed_callback_remove_all(session);
 703         sr_session_destroy(session);
 704
 705 }