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 <glib.h>
  21 #include <glib/gstdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include "sigrok-cli.h"
  25
  26 static uint64_t limit_samples = 0;
  27 static uint64_t limit_frames = 0;
  28
  29 #ifdef HAVE_SRD
  30 extern struct srd_session *srd_sess;
  31 #endif
  32
  33 static int set_limit_time(const struct sr_dev_inst *sdi)
  34 {
  35         GVariant *gvar;
  36         uint64_t time_msec;
  37         uint64_t samplerate;
  38         struct sr_dev_driver *driver;
  39
  40         driver = sr_dev_inst_driver_get(sdi);
  41
  42         if (!(time_msec = sr_parse_timestring(opt_time))) {
  43                 g_critical("Invalid time '%s'", opt_time);
  44                 return SR_ERR;
  45         }
  46
  47         if (config_key_has_cap(driver, sdi, NULL, SR_CONF_LIMIT_MSEC, SR_CONF_SET)) {
  48                 gvar = g_variant_new_uint64(time_msec);
  49                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_MSEC, gvar) != SR_OK) {
  50                         g_critical("Failed to configure time limit.");
  51                         return SR_ERR;
  52                 }
  53         } else if (config_key_has_cap(driver, sdi, NULL, SR_CONF_SAMPLERATE,
  54                         SR_CONF_GET | SR_CONF_SET)) {
  55                 /* Convert to samples based on the samplerate. */
  56                 sr_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE, &gvar);
  57                 samplerate = g_variant_get_uint64(gvar);
  58                 g_variant_unref(gvar);
  59                 limit_samples = (samplerate) * time_msec / (uint64_t)1000;
  60                 if (limit_samples == 0) {
  61                         g_critical("Not enough time at this samplerate.");
  62                         return SR_ERR;
  63                 }
  64                 gvar = g_variant_new_uint64(limit_samples);
  65                 if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
  66                         g_critical("Failed to configure time-based sample limit.");
  67                         return SR_ERR;
  68                 }
  69         } else {
  70                 g_critical("This device does not support time limits.");
  71                 return SR_ERR;
  72         }
  73
  74         return SR_OK;
  75 }
  76
  77 const struct sr_output *setup_output_format(const struct sr_dev_inst *sdi, FILE **outfile)
  78 {
  79         const struct sr_output_module *omod;
  80         const struct sr_option **options;
  81         const struct sr_output *o;
  82         GHashTable *fmtargs, *fmtopts;
  83         char *fmtspec;
  84
  85         if (!opt_output_format) {
  86                 if (opt_output_file) {
  87                         opt_output_format = DEFAULT_OUTPUT_FORMAT_FILE;
  88                 } else {
  89                         opt_output_format = DEFAULT_OUTPUT_FORMAT_NOFILE;
  90                 }
  91         }
  92
  93         fmtargs = parse_generic_arg(opt_output_format, TRUE);
  94         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
  95         if (!fmtspec)
  96                 g_critical("Invalid output format.");
  97         if (!(omod = sr_output_find(fmtspec)))
  98                 g_critical("Unknown output module '%s'.", fmtspec);
  99         g_hash_table_remove(fmtargs, "sigrok_key");
 100         if ((options = sr_output_options_get(omod))) {
 101                 fmtopts = generic_arg_to_opt(options, fmtargs);
 102                 sr_output_options_free(options);
 103         } else
 104                 fmtopts = NULL;
 105         o = sr_output_new(omod, fmtopts, sdi, opt_output_file);
 106
 107         if (opt_output_file) {
 108                 if (!sr_output_test_flag(omod, SR_OUTPUT_INTERNAL_IO_HANDLING))
 109                         *outfile = g_fopen(opt_output_file, "wb");
 110                 else
 111                         *outfile = NULL;
 112         } else {
 113                 *outfile = stdout;
 114         }
 115
 116         if (fmtopts)
 117                 g_hash_table_destroy(fmtopts);
 118         g_hash_table_destroy(fmtargs);
 119
 120         return o;
 121 }
 122
 123 const struct sr_transform *setup_transform_module(const struct sr_dev_inst *sdi)
 124 {
 125         const struct sr_transform_module *tmod;
 126         const struct sr_option **options;
 127         const struct sr_transform *t;
 128         GHashTable *fmtargs, *fmtopts;
 129         char *fmtspec;
 130
 131         if (!opt_transform_module)
 132                 opt_transform_module = "nop";
 133
 134         fmtargs = parse_generic_arg(opt_transform_module, TRUE);
 135         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
 136         if (!fmtspec)
 137                 g_critical("Invalid transform module.");
 138         if (!(tmod = sr_transform_find(fmtspec)))
 139                 g_critical("Unknown transform module '%s'.", fmtspec);
 140         g_hash_table_remove(fmtargs, "sigrok_key");
 141         if ((options = sr_transform_options_get(tmod))) {
 142                 fmtopts = generic_arg_to_opt(options, fmtargs);
 143                 sr_transform_options_free(options);
 144         } else
 145                 fmtopts = NULL;
 146         t = sr_transform_new(tmod, fmtopts, sdi);
 147         if (fmtopts)
 148                 g_hash_table_destroy(fmtopts);
 149         g_hash_table_destroy(fmtargs);
 150
 151         return t;
 152 }
 153
 154 void datafeed_in(const struct sr_dev_inst *sdi,
 155                 const struct sr_datafeed_packet *packet, void *cb_data)
 156 {
 157         const struct sr_datafeed_meta *meta;
 158         const struct sr_datafeed_logic *logic;
 159         const struct sr_datafeed_analog *analog;
 160         struct sr_session *session;
 161         struct sr_config *src;
 162         static const struct sr_output *o = NULL;
 163         static const struct sr_output *oa = NULL;
 164         static uint64_t rcvd_samples_logic = 0;
 165         static uint64_t rcvd_samples_analog = 0;
 166         static uint64_t samplerate = 0;
 167         static int triggered = 0;
 168         static FILE *outfile = NULL;
 169         GSList *l;
 170         GString *out;
 171         GVariant *gvar;
 172         uint64_t end_sample;
 173         uint64_t input_len;
 174         struct sr_dev_driver *driver;
 175
 176         driver = sr_dev_inst_driver_get(sdi);
 177
 178         /* If the first packet to come in isn't a header, don't even try. */
 179         if (packet->type != SR_DF_HEADER && !o)
 180                 return;
 181
 182         session = cb_data;
 183         switch (packet->type) {
 184         case SR_DF_HEADER:
 185                 g_debug("cli: Received SR_DF_HEADER.");
 186                 if (!(o = setup_output_format(sdi, &outfile)))
 187                         g_critical("Failed to initialize output module.");
 188
 189                 /* Set up backup analog output module. */
 190                 oa = sr_output_new(sr_output_find("analog"), NULL, sdi, NULL);
 191
 192                 rcvd_samples_logic = rcvd_samples_analog = 0;
 193
 194                 if (maybe_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE,
 195                                 &gvar) == SR_OK) {
 196                         samplerate = g_variant_get_uint64(gvar);
 197                         g_variant_unref(gvar);
 198                 }
 199
 200 #ifdef HAVE_SRD
 201                 if (opt_pds) {
 202                         if (samplerate) {
 203                                 if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 204                                                 g_variant_new_uint64(samplerate)) != SRD_OK) {
 205                                         g_critical("Failed to configure decode session.");
 206                                         break;
 207                                 }
 208                         }
 209                         if (srd_session_start(srd_sess) != SRD_OK) {
 210                                 g_critical("Failed to start decode session.");
 211                                 break;
 212                         }
 213                 }
 214 #endif
 215                 break;
 216
 217         case SR_DF_META:
 218                 g_debug("cli: Received SR_DF_META.");
 219                 meta = packet->payload;
 220                 for (l = meta->config; l; l = l->next) {
 221                         src = l->data;
 222                         switch (src->key) {
 223                         case SR_CONF_SAMPLERATE:
 224                                 samplerate = g_variant_get_uint64(src->data);
 225                                 g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 226 #ifdef HAVE_SRD
 227                                 if (opt_pds) {
 228                                         if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 229                                                         g_variant_new_uint64(samplerate)) != SRD_OK) {
 230                                                 g_critical("Failed to pass samplerate to decoder.");
 231                                         }
 232                                 }
 233 #endif
 234                                 break;
 235                         case SR_CONF_SAMPLE_INTERVAL:
 236                                 samplerate = g_variant_get_uint64(src->data);
 237                                 g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 238                                 break;
 239                         default:
 240                                 /* Unknown metadata is not an error. */
 241                                 break;
 242                         }
 243                 }
 244                 break;
 245
 246         case SR_DF_TRIGGER:
 247                 g_debug("cli: Received SR_DF_TRIGGER.");
 248                 triggered = 1;
 249                 break;
 250
 251         case SR_DF_LOGIC:
 252                 logic = packet->payload;
 253                 g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
 254                                 logic->length, logic->unitsize);
 255                 if (logic->length == 0)
 256                         break;
 257
 258                 /* Don't store any samples until triggered. */
 259                 if (opt_wait_trigger && !triggered)
 260                         break;
 261
 262                 if (limit_samples && rcvd_samples_logic >= limit_samples)
 263                         break;
 264
 265                 end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
 266                 /* Cut off last packet according to the sample limit. */
 267                 if (limit_samples && end_sample > limit_samples)
 268                         end_sample = limit_samples;
 269                 input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 270
 271                 if (opt_pds) {
 272 #ifdef HAVE_SRD
 273                         if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
 274                                         logic->data, input_len, logic->unitsize) != SRD_OK)
 275                                 sr_session_stop(session);
 276 #endif
 277                 }
 278
 279                 rcvd_samples_logic = end_sample;
 280                 break;
 281
 282         case SR_DF_ANALOG:
 283                 analog = packet->payload;
 284                 g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 285                 if (analog->num_samples == 0)
 286                         break;
 287
 288                 if (limit_samples && rcvd_samples_analog >= limit_samples)
 289                         break;
 290
 291                 rcvd_samples_analog += analog->num_samples;
 292                 break;
 293
 294         case SR_DF_FRAME_BEGIN:
 295                 g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 296                 break;
 297
 298         case SR_DF_FRAME_END:
 299                 g_debug("cli: Received SR_DF_FRAME_END.");
 300                 break;
 301
 302         default:
 303                 break;
 304         }
 305
 306         if (o && !opt_pds) {
 307                 if (sr_output_send(o, packet, &out) == SR_OK) {
 308                         if (!out || (out->len == 0
 309                                         && !opt_output_format
 310                                         && packet->type == SR_DF_ANALOG)) {
 311                                 /*
 312                                  * The user didn't specify an output module,
 313                                  * but needs to see this analog data.
 314                                  */
 315                                 sr_output_send(oa, packet, &out);
 316                         }
 317                         if (outfile && out && out->len > 0) {
 318                                 fwrite(out->str, 1, out->len, outfile);
 319                                 fflush(outfile);
 320                         }
 321                         if (out)
 322                                 g_string_free(out, TRUE);
 323                 }
 324         }
 325
 326         /*
 327          * SR_DF_END needs to be handled after the output module's receive()
 328          * is called, so it can properly clean up that module.
 329          */
 330         if (packet->type == SR_DF_END) {
 331                 g_debug("cli: Received SR_DF_END.");
 332
 333                 if (o)
 334                         sr_output_free(o);
 335                 o = NULL;
 336
 337                 sr_output_free(oa);
 338                 oa = NULL;
 339
 340                 if (outfile && outfile != stdout)
 341                         fclose(outfile);
 342
 343                 if (limit_samples) {
 344                         if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
 345                                 g_warning("Device only sent %" PRIu64 " samples.",
 346                                            rcvd_samples_logic);
 347                         else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
 348                                 g_warning("Device only sent %" PRIu64 " samples.",
 349                                            rcvd_samples_analog);
 350                 }
 351         }
 352
 353 }
 354
 355 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 356 {
 357         const struct sr_key_info *srci, *srmqi;
 358         double tmp_double, dlow, dhigh;
 359         uint64_t tmp_u64, p, q, low, high, mqflags;
 360         uint32_t mq;
 361         GVariant *rational[2], *range[2], *gtup[2];
 362         GVariantBuilder *vbl;
 363         gboolean tmp_bool;
 364         gchar **keyval;
 365         int ret, i;
 366
 367         if (!(srci = sr_key_info_name_get(SR_KEY_CONFIG, key))) {
 368                 g_critical("Unknown device option '%s'.", (char *) key);
 369                 return -1;
 370         }
 371         src->key = srci->key;
 372
 373         if ((!value || strlen(value) == 0) &&
 374                 (srci->datatype != SR_T_BOOL)) {
 375                 g_critical("Option '%s' needs a value.", (char *)key);
 376                 return -1;
 377         }
 378
 379         ret = 0;
 380         switch (srci->datatype) {
 381         case SR_T_UINT64:
 382                 ret = sr_parse_sizestring(value, &tmp_u64);
 383                 if (ret != 0)
 384                         break;
 385                 src->data = g_variant_new_uint64(tmp_u64);
 386                 break;
 387         case SR_T_INT32:
 388                 ret = sr_parse_sizestring(value, &tmp_u64);
 389                 if (ret != 0)
 390                         break;
 391                 src->data = g_variant_new_int32(tmp_u64);
 392                 break;
 393         case SR_T_STRING:
 394                 src->data = g_variant_new_string(value);
 395                 break;
 396         case SR_T_BOOL:
 397                 if (!value)
 398                         tmp_bool = TRUE;
 399                 else
 400                         tmp_bool = sr_parse_boolstring(value);
 401                 src->data = g_variant_new_boolean(tmp_bool);
 402                 break;
 403         case SR_T_FLOAT:
 404                 tmp_double = strtof(value, NULL);
 405                 src->data = g_variant_new_double(tmp_double);
 406                 break;
 407         case SR_T_RATIONAL_PERIOD:
 408                 if ((ret = sr_parse_period(value, &p, &q)) != SR_OK)
 409                         break;
 410                 rational[0] = g_variant_new_uint64(p);
 411                 rational[1] = g_variant_new_uint64(q);
 412                 src->data = g_variant_new_tuple(rational, 2);
 413                 break;
 414         case SR_T_RATIONAL_VOLT:
 415                 if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
 416                         break;
 417                 rational[0] = g_variant_new_uint64(p);
 418                 rational[1] = g_variant_new_uint64(q);
 419                 src->data = g_variant_new_tuple(rational, 2);
 420                 break;
 421         case SR_T_UINT64_RANGE:
 422                 if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
 423                         ret = -1;
 424                         break;
 425                 } else {
 426                         range[0] = g_variant_new_uint64(low);
 427                         range[1] = g_variant_new_uint64(high);
 428                         src->data = g_variant_new_tuple(range, 2);
 429                 }
 430                 break;
 431         case SR_T_DOUBLE_RANGE:
 432                 if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
 433                         ret = -1;
 434                         break;
 435                 } else {
 436                         range[0] = g_variant_new_double(dlow);
 437                         range[1] = g_variant_new_double(dhigh);
 438                         src->data = g_variant_new_tuple(range, 2);
 439                 }
 440                 break;
 441         case SR_T_KEYVALUE:
 442                 /* Expects the argument to be in the form of key=value. */
 443                 keyval = g_strsplit(value, "=", 2);
 444                 if (!keyval[0] || !keyval[1]) {
 445                         g_strfreev(keyval);
 446                         ret = -1;
 447                         break;
 448                 } else {
 449                         vbl = g_variant_builder_new(G_VARIANT_TYPE_DICTIONARY);
 450                         g_variant_builder_add(vbl, "{ss}",
 451                                               keyval[0], keyval[1]);
 452                         src->data = g_variant_builder_end(vbl);
 453                         g_strfreev(keyval);
 454                 }
 455                 break;
 456         case SR_T_MQ:
 457                 /*
 458                   Argument is MQ id e.g. ("voltage") optionally followed by one
 459                   or more /<mqflag> e.g. "/ac".
 460                  */
 461                 keyval = g_strsplit(value, "/", 0);
 462                 if (!keyval[0] || !(srmqi = sr_key_info_name_get(SR_KEY_MQ, keyval[0]))) {
 463                         g_strfreev(keyval);
 464                         ret = -1;
 465                         break;
 466                 }
 467                 mq = srmqi->key;
 468                 mqflags = 0;
 469                 for (i = 1; keyval[i]; i++) {
 470                         if (!(srmqi = sr_key_info_name_get(SR_KEY_MQFLAGS, keyval[i]))) {
 471                                 ret = -1;
 472                                 break;
 473                         }
 474                         mqflags |= srmqi->key;
 475                 }
 476                 g_strfreev(keyval);
 477                 if (ret != -1) {
 478                         gtup[0] = g_variant_new_uint32(mq);
 479                         gtup[1] = g_variant_new_uint64(mqflags);
 480                         src->data = g_variant_new_tuple(gtup, 2);
 481                 }
 482                 break;
 483         default:
 484                 g_critical("Unknown data type specified for option '%s' "
 485                            "(driver implementation bug?).", key);
 486                 ret = -1;
 487         }
 488
 489         if (ret < 0)
 490                 g_critical("Invalid value: '%s' for option '%s'", value, key);
 491
 492         return ret;
 493 }
 494
 495 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 496 {
 497         struct sr_config src;
 498         struct sr_channel_group *cg;
 499         GHashTableIter iter;
 500         gpointer key, value;
 501         int ret;
 502
 503         g_hash_table_iter_init(&iter, args);
 504         while (g_hash_table_iter_next(&iter, &key, &value)) {
 505                 if ((ret = opt_to_gvar(key, value, &src)) != 0)
 506                         return ret;
 507                 cg = select_channel_group(sdi);
 508                 if ((ret = maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, cg,
 509                                 src.key, src.data)) != SR_OK) {
 510                         g_critical("Failed to set device option '%s': %s.",
 511                                    (char *)key, sr_strerror(ret));
 512                         return ret;
 513                 }
 514         }
 515
 516         return SR_OK;
 517 }
 518
 519 void run_session(void)
 520 {
 521         GSList *devices, *real_devices, *sd;
 522         GHashTable *devargs;
 523         GVariant *gvar;
 524         struct sr_session *session;
 525         struct sr_trigger *trigger;
 526         struct sr_dev_inst *sdi;
 527         uint64_t min_samples, max_samples;
 528         gsize n_elements, i;
 529         const uint32_t *dev_opts;
 530         int is_demo_dev;
 531         struct sr_dev_driver *driver;
 532         const struct sr_transform *t;
 533
 534         devices = device_scan();
 535         if (!devices) {
 536                 g_critical("No devices found.");
 537                 return;
 538         }
 539
 540         real_devices = NULL;
 541         for (sd = devices; sd; sd = sd->next) {
 542                 sdi = sd->data;
 543
 544                 driver = sr_dev_inst_driver_get(sdi);
 545
 546                 if (sr_config_list(driver, sdi, NULL, SR_CONF_DEVICE_OPTIONS, &gvar) != SR_OK) {
 547                         g_critical("Failed to query list device options.");
 548                         return;
 549                 }
 550
 551                 dev_opts = g_variant_get_fixed_array(gvar, &n_elements, sizeof(uint32_t));
 552
 553                 is_demo_dev = 0;
 554                 for (i = 0; i < n_elements; i++) {
 555                         if (dev_opts[i] == SR_CONF_DEMO_DEV)
 556                                 is_demo_dev = 1;
 557                 }
 558
 559                 g_variant_unref(gvar);
 560
 561                 if (!is_demo_dev)
 562                         real_devices = g_slist_append(real_devices, sdi);
 563         }
 564
 565         if (g_slist_length(devices) > 1) {
 566                 if (g_slist_length(real_devices) != 1) {
 567                         g_critical("sigrok-cli only supports one device for capturing.");
 568                         return;
 569                 } else {
 570                         /* We only have one non-demo device. */
 571                         g_slist_free(devices);
 572                         devices = real_devices;
 573                         real_devices = NULL;
 574                 }
 575         }
 576
 577         sdi = devices->data;
 578         g_slist_free(devices);
 579         g_slist_free(real_devices);
 580
 581         sr_session_new(sr_ctx, &session);
 582         sr_session_datafeed_callback_add(session, datafeed_in, NULL);
 583
 584         if (sr_dev_open(sdi) != SR_OK) {
 585                 g_critical("Failed to open device.");
 586                 return;
 587         }
 588
 589         if (sr_session_dev_add(session, sdi) != SR_OK) {
 590                 g_critical("Failed to add device to session.");
 591                 sr_session_destroy(session);
 592                 return;
 593         }
 594
 595         if (opt_config) {
 596                 if ((devargs = parse_generic_arg(opt_config, FALSE))) {
 597                         if (set_dev_options(sdi, devargs) != SR_OK)
 598                                 return;
 599                         g_hash_table_destroy(devargs);
 600                 }
 601         }
 602
 603         if (select_channels(sdi) != SR_OK) {
 604                 g_critical("Failed to set channels.");
 605                 sr_session_destroy(session);
 606                 return;
 607         }
 608
 609         if (opt_triggers) {
 610                 if (!parse_triggerstring(sdi, opt_triggers, &trigger)) {
 611                         sr_session_destroy(session);
 612                         return;
 613                 }
 614                 if (sr_session_trigger_set(session, trigger) != SR_OK) {
 615                         sr_session_destroy(session);
 616                         return;
 617                 }
 618         }
 619
 620         if (opt_continuous) {
 621                 if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
 622                         g_critical("This device does not support continuous sampling.");
 623                         sr_session_destroy(session);
 624                         return;
 625                 }
 626         }
 627
 628         if (opt_time) {
 629                 if (set_limit_time(sdi) != SR_OK) {
 630                         sr_session_destroy(session);
 631                         return;
 632                 }
 633         }
 634
 635         if (opt_samples) {
 636                 if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
 637                         g_critical("Invalid sample limit '%s'.", opt_samples);
 638                         sr_session_destroy(session);
 639                         return;
 640                 }
 641                 if (maybe_config_list(driver, sdi, NULL, SR_CONF_LIMIT_SAMPLES,
 642                                 &gvar) == SR_OK) {
 643                         /*
 644                          * The device has no compression, or compression is turned
 645                          * off, and publishes its sample memory size.
 646                          */
 647                         g_variant_get(gvar, "(tt)", &min_samples, &max_samples);
 648                         g_variant_unref(gvar);
 649                         if (limit_samples < min_samples) {
 650                                 g_critical("The device stores at least %"PRIu64
 651                                                 " samples with the current settings.", min_samples);
 652                         }
 653                         if (limit_samples > max_samples) {
 654                                 g_critical("The device can store only %"PRIu64
 655                                                 " samples with the current settings.", max_samples);
 656                         }
 657                 }
 658                 gvar = g_variant_new_uint64(limit_samples);
 659                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
 660                         g_critical("Failed to configure sample limit.");
 661                         sr_session_destroy(session);
 662                         return;
 663                 }
 664         }
 665
 666         if (opt_frames) {
 667                 if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
 668                         g_critical("Invalid sample limit '%s'.", opt_samples);
 669                         sr_session_destroy(session);
 670                         return;
 671                 }
 672                 gvar = g_variant_new_uint64(limit_frames);
 673                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
 674                         g_critical("Failed to configure frame limit.");
 675                         sr_session_destroy(session);
 676                         return;
 677                 }
 678         }
 679
 680         if (!(t = setup_transform_module(sdi)))
 681                 g_critical("Failed to initialize transform module.");
 682
 683         if (sr_session_start(session) != SR_OK) {
 684                 g_critical("Failed to start session.");
 685                 sr_session_destroy(session);
 686                 return;
 687         }
 688
 689         if (opt_continuous)
 690                 add_anykey(session);
 691
 692         sr_session_run(session);
 693
 694         if (opt_continuous)
 695                 clear_anykey();
 696
 697         sr_session_datafeed_callback_remove_all(session);
 698         sr_session_destroy(session);
 699
 700 }