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);
  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                 sr_output_options_free(options);
 105         } else
 106                 fmtopts = NULL;
 107         o = sr_output_new(omod, fmtopts, sdi, opt_output_file);
 108
 109         if (opt_output_file) {
 110                 if (!sr_output_test_flag(omod, SR_OUTPUT_INTERNAL_IO_HANDLING))
 111                         *outfile = g_fopen(opt_output_file, "wb");
 112                 else
 113                         *outfile = NULL;
 114         } else {
 115                 *outfile = stdout;
 116         }
 117
 118         if (fmtopts)
 119                 g_hash_table_destroy(fmtopts);
 120         g_hash_table_destroy(fmtargs);
 121
 122         return o;
 123 }
 124
 125 const struct sr_transform *setup_transform_module(const struct sr_dev_inst *sdi)
 126 {
 127         const struct sr_transform_module *tmod;
 128         const struct sr_option **options;
 129         const struct sr_transform *t;
 130         GHashTable *fmtargs, *fmtopts;
 131         char *fmtspec;
 132
 133         if (!opt_transform_module)
 134                 opt_transform_module = "nop";
 135
 136         fmtargs = parse_generic_arg(opt_transform_module, TRUE);
 137         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
 138         if (!fmtspec)
 139                 g_critical("Invalid transform module.");
 140         if (!(tmod = sr_transform_find(fmtspec)))
 141                 g_critical("Unknown transform module '%s'.", fmtspec);
 142         g_hash_table_remove(fmtargs, "sigrok_key");
 143         if ((options = sr_transform_options_get(tmod))) {
 144                 fmtopts = generic_arg_to_opt(options, fmtargs);
 145                 sr_transform_options_free(options);
 146         } else
 147                 fmtopts = NULL;
 148         t = sr_transform_new(tmod, fmtopts, sdi);
 149         if (fmtopts)
 150                 g_hash_table_destroy(fmtopts);
 151         g_hash_table_destroy(fmtargs);
 152
 153         return t;
 154 }
 155
 156 void datafeed_in(const struct sr_dev_inst *sdi,
 157                 const struct sr_datafeed_packet *packet, void *cb_data)
 158 {
 159         const struct sr_datafeed_meta *meta;
 160         const struct sr_datafeed_logic *logic;
 161         const struct sr_datafeed_analog *analog;
 162         struct sr_session *session;
 163         struct sr_config *src;
 164         static const struct sr_output *o = NULL;
 165         static const struct sr_output *oa = NULL;
 166         static uint64_t rcvd_samples_logic = 0;
 167         static uint64_t rcvd_samples_analog = 0;
 168         static uint64_t samplerate = 0;
 169         static int triggered = 0;
 170         static FILE *outfile = NULL;
 171         GSList *l;
 172         GString *out;
 173         GVariant *gvar;
 174         uint64_t end_sample;
 175         uint64_t input_len;
 176         struct sr_dev_driver *driver;
 177
 178         driver = sr_dev_inst_driver_get(sdi);
 179
 180         /* If the first packet to come in isn't a header, don't even try. */
 181         if (packet->type != SR_DF_HEADER && !o)
 182                 return;
 183
 184         session = cb_data;
 185         switch (packet->type) {
 186         case SR_DF_HEADER:
 187                 g_debug("cli: Received SR_DF_HEADER.");
 188                 if (!(o = setup_output_format(sdi, &outfile)))
 189                         g_critical("Failed to initialize output module.");
 190
 191                 /* Set up backup analog output module. */
 192                 oa = sr_output_new(sr_output_find("analog"), NULL, sdi, NULL);
 193
 194                 rcvd_samples_logic = rcvd_samples_analog = 0;
 195
 196                 if (maybe_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE,
 197                                 &gvar) == SR_OK) {
 198                         samplerate = g_variant_get_uint64(gvar);
 199                         g_variant_unref(gvar);
 200                 }
 201
 202 #ifdef HAVE_SRD
 203                 if (opt_pds) {
 204                         if (samplerate) {
 205                                 if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 206                                                 g_variant_new_uint64(samplerate)) != SRD_OK) {
 207                                         g_critical("Failed to configure decode session.");
 208                                         break;
 209                                 }
 210                         }
 211                         if (srd_session_start(srd_sess) != SRD_OK) {
 212                                 g_critical("Failed to start decode session.");
 213                                 break;
 214                         }
 215                 }
 216 #endif
 217                 break;
 218
 219         case SR_DF_META:
 220                 g_debug("cli: Received SR_DF_META.");
 221                 meta = packet->payload;
 222                 for (l = meta->config; l; l = l->next) {
 223                         src = l->data;
 224                         switch (src->key) {
 225                         case SR_CONF_SAMPLERATE:
 226                                 samplerate = g_variant_get_uint64(src->data);
 227                                 g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 228 #ifdef HAVE_SRD
 229                                 if (opt_pds) {
 230                                         if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 231                                                         g_variant_new_uint64(samplerate)) != SRD_OK) {
 232                                                 g_critical("Failed to pass samplerate to decoder.");
 233                                         }
 234                                 }
 235 #endif
 236                                 break;
 237                         case SR_CONF_SAMPLE_INTERVAL:
 238                                 samplerate = g_variant_get_uint64(src->data);
 239                                 g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 240                                 break;
 241                         default:
 242                                 /* Unknown metadata is not an error. */
 243                                 break;
 244                         }
 245                 }
 246                 break;
 247
 248         case SR_DF_TRIGGER:
 249                 g_debug("cli: Received SR_DF_TRIGGER.");
 250                 triggered = 1;
 251                 break;
 252
 253         case SR_DF_LOGIC:
 254                 logic = packet->payload;
 255                 g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
 256                                 logic->length, logic->unitsize);
 257                 if (logic->length == 0)
 258                         break;
 259
 260                 /* Don't store any samples until triggered. */
 261                 if (opt_wait_trigger && !triggered)
 262                         break;
 263
 264                 if (limit_samples && rcvd_samples_logic >= limit_samples)
 265                         break;
 266
 267                 end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
 268                 /* Cut off last packet according to the sample limit. */
 269                 if (limit_samples && end_sample > limit_samples)
 270                         end_sample = limit_samples;
 271                 input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 272
 273                 if (opt_pds) {
 274 #ifdef HAVE_SRD
 275                         if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
 276                                         logic->data, input_len, logic->unitsize) != SRD_OK)
 277                                 sr_session_stop(session);
 278 #endif
 279                 }
 280
 281                 rcvd_samples_logic = end_sample;
 282                 break;
 283
 284         case SR_DF_ANALOG:
 285                 analog = packet->payload;
 286                 g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 287                 if (analog->num_samples == 0)
 288                         break;
 289
 290                 if (limit_samples && rcvd_samples_analog >= limit_samples)
 291                         break;
 292
 293                 rcvd_samples_analog += analog->num_samples;
 294                 break;
 295
 296         case SR_DF_FRAME_BEGIN:
 297                 g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 298                 break;
 299
 300         case SR_DF_FRAME_END:
 301                 g_debug("cli: Received SR_DF_FRAME_END.");
 302                 break;
 303
 304         default:
 305                 break;
 306         }
 307
 308         if (o && !opt_pds) {
 309                 if (sr_output_send(o, packet, &out) == SR_OK) {
 310                         if (!out || (out->len == 0
 311                                         && !opt_output_format
 312                                         && packet->type == SR_DF_ANALOG)) {
 313                                 /*
 314                                  * The user didn't specify an output module,
 315                                  * but needs to see this analog data.
 316                                  */
 317                                 sr_output_send(oa, packet, &out);
 318                         }
 319                         if (outfile && out && out->len > 0) {
 320                                 fwrite(out->str, 1, out->len, outfile);
 321                                 fflush(outfile);
 322                         }
 323                         if (out)
 324                                 g_string_free(out, TRUE);
 325                 }
 326         }
 327
 328         /*
 329          * SR_DF_END needs to be handled after the output module's receive()
 330          * is called, so it can properly clean up that module.
 331          */
 332         if (packet->type == SR_DF_END) {
 333                 g_debug("cli: Received SR_DF_END.");
 334
 335                 if (o)
 336                         sr_output_free(o);
 337                 o = NULL;
 338
 339                 sr_output_free(oa);
 340                 oa = NULL;
 341
 342                 if (outfile && outfile != stdout)
 343                         fclose(outfile);
 344
 345                 if (limit_samples) {
 346                         if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
 347                                 g_warning("Device only sent %" PRIu64 " samples.",
 348                                            rcvd_samples_logic);
 349                         else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
 350                                 g_warning("Device only sent %" PRIu64 " samples.",
 351                                            rcvd_samples_analog);
 352                 }
 353         }
 354
 355 }
 356
 357 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 358 {
 359         const struct sr_key_info *srci, *srmqi;
 360         double tmp_double, dlow, dhigh;
 361         uint64_t tmp_u64, p, q, low, high, mqflags;
 362         uint32_t mq;
 363         GVariant *rational[2], *range[2], *gtup[2];
 364         GVariantBuilder *vbl;
 365         gboolean tmp_bool;
 366         gchar **keyval;
 367         int ret, i;
 368
 369         if (!(srci = sr_key_info_name_get(SR_KEY_CONFIG, key))) {
 370                 g_critical("Unknown device option '%s'.", (char *) key);
 371                 return -1;
 372         }
 373         src->key = srci->key;
 374
 375         if ((!value || strlen(value) == 0) &&
 376                 (srci->datatype != SR_T_BOOL)) {
 377                 g_critical("Option '%s' needs a value.", (char *)key);
 378                 return -1;
 379         }
 380
 381         ret = 0;
 382         switch (srci->datatype) {
 383         case SR_T_UINT64:
 384                 ret = sr_parse_sizestring(value, &tmp_u64);
 385                 if (ret != 0)
 386                         break;
 387                 src->data = g_variant_new_uint64(tmp_u64);
 388                 break;
 389         case SR_T_INT32:
 390                 ret = sr_parse_sizestring(value, &tmp_u64);
 391                 if (ret != 0)
 392                         break;
 393                 src->data = g_variant_new_int32(tmp_u64);
 394                 break;
 395         case SR_T_STRING:
 396                 src->data = g_variant_new_string(value);
 397                 break;
 398         case SR_T_BOOL:
 399                 if (!value)
 400                         tmp_bool = TRUE;
 401                 else
 402                         tmp_bool = sr_parse_boolstring(value);
 403                 src->data = g_variant_new_boolean(tmp_bool);
 404                 break;
 405         case SR_T_FLOAT:
 406                 tmp_double = strtof(value, NULL);
 407                 src->data = g_variant_new_double(tmp_double);
 408                 break;
 409         case SR_T_RATIONAL_PERIOD:
 410                 if ((ret = sr_parse_period(value, &p, &q)) != SR_OK)
 411                         break;
 412                 rational[0] = g_variant_new_uint64(p);
 413                 rational[1] = g_variant_new_uint64(q);
 414                 src->data = g_variant_new_tuple(rational, 2);
 415                 break;
 416         case SR_T_RATIONAL_VOLT:
 417                 if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
 418                         break;
 419                 rational[0] = g_variant_new_uint64(p);
 420                 rational[1] = g_variant_new_uint64(q);
 421                 src->data = g_variant_new_tuple(rational, 2);
 422                 break;
 423         case SR_T_UINT64_RANGE:
 424                 if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
 425                         ret = -1;
 426                         break;
 427                 } else {
 428                         range[0] = g_variant_new_uint64(low);
 429                         range[1] = g_variant_new_uint64(high);
 430                         src->data = g_variant_new_tuple(range, 2);
 431                 }
 432                 break;
 433         case SR_T_DOUBLE_RANGE:
 434                 if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
 435                         ret = -1;
 436                         break;
 437                 } else {
 438                         range[0] = g_variant_new_double(dlow);
 439                         range[1] = g_variant_new_double(dhigh);
 440                         src->data = g_variant_new_tuple(range, 2);
 441                 }
 442                 break;
 443         case SR_T_KEYVALUE:
 444                 /* Expects the argument to be in the form of key=value. */
 445                 keyval = g_strsplit(value, "=", 2);
 446                 if (!keyval[0] || !keyval[1]) {
 447                         g_strfreev(keyval);
 448                         ret = -1;
 449                         break;
 450                 } else {
 451                         vbl = g_variant_builder_new(G_VARIANT_TYPE_DICTIONARY);
 452                         g_variant_builder_add(vbl, "{ss}",
 453                                               keyval[0], keyval[1]);
 454                         src->data = g_variant_builder_end(vbl);
 455                         g_strfreev(keyval);
 456                 }
 457                 break;
 458         case SR_T_MQ:
 459                 /*
 460                   Argument is MQ id e.g. ("voltage") optionally followed by one
 461                   or more /<mqflag> e.g. "/ac".
 462                  */
 463                 keyval = g_strsplit(value, "/", 0);
 464                 if (!keyval[0] || !(srmqi = sr_key_info_name_get(SR_KEY_MQ, keyval[0]))) {
 465                         g_strfreev(keyval);
 466                         ret = -1;
 467                         break;
 468                 }
 469                 mq = srmqi->key;
 470                 mqflags = 0;
 471                 for (i = 1; keyval[i]; i++) {
 472                         if (!(srmqi = sr_key_info_name_get(SR_KEY_MQFLAGS, keyval[i]))) {
 473                                 ret = -1;
 474                                 break;
 475                         }
 476                         mqflags |= srmqi->key;
 477                 }
 478                 g_strfreev(keyval);
 479                 if (ret != -1) {
 480                         gtup[0] = g_variant_new_uint32(mq);
 481                         gtup[1] = g_variant_new_uint64(mqflags);
 482                         src->data = g_variant_new_tuple(gtup, 2);
 483                 }
 484                 break;
 485         default:
 486                 g_critical("Unknown data type specified for option '%s' "
 487                            "(driver implementation bug?).", key);
 488                 ret = -1;
 489         }
 490
 491         if (ret < 0)
 492                 g_critical("Invalid value: '%s' for option '%s'", value, key);
 493
 494         return ret;
 495 }
 496
 497 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 498 {
 499         struct sr_config src;
 500         struct sr_channel_group *cg;
 501         GHashTableIter iter;
 502         gpointer key, value;
 503         int ret;
 504
 505         g_hash_table_iter_init(&iter, args);
 506         while (g_hash_table_iter_next(&iter, &key, &value)) {
 507                 if ((ret = opt_to_gvar(key, value, &src)) != 0)
 508                         return ret;
 509                 cg = select_channel_group(sdi);
 510                 if ((ret = maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, cg,
 511                                 src.key, src.data)) != SR_OK) {
 512                         g_critical("Failed to set device option '%s': %s.",
 513                                    (char *)key, sr_strerror(ret));
 514                         return ret;
 515                 }
 516         }
 517
 518         return SR_OK;
 519 }
 520
 521 void run_session(void)
 522 {
 523         GSList *devices, *real_devices, *sd;
 524         GHashTable *devargs;
 525         GVariant *gvar;
 526         struct sr_session *session;
 527         struct sr_trigger *trigger;
 528         struct sr_dev_inst *sdi;
 529         uint64_t min_samples, max_samples;
 530         GArray *dev_opts;
 531         guint i;
 532         int is_demo_dev;
 533         struct sr_dev_driver *driver;
 534         const struct sr_transform *t;
 535         GMainLoop *main_loop;
 536
 537         devices = device_scan();
 538         if (!devices) {
 539                 g_critical("No devices found.");
 540                 return;
 541         }
 542
 543         real_devices = NULL;
 544         for (sd = devices; sd; sd = sd->next) {
 545                 sdi = sd->data;
 546
 547                 driver = sr_dev_inst_driver_get(sdi);
 548
 549                 if (!(dev_opts = sr_dev_options(driver, sdi, NULL))) {
 550                         g_critical("Failed to query list device options.");
 551                         return;
 552                 }
 553
 554                 is_demo_dev = 0;
 555                 for (i = 0; i < dev_opts->len; i++) {
 556                         if (g_array_index(dev_opts, uint32_t, i) == SR_CONF_DEMO_DEV)
 557                                 is_demo_dev = 1;
 558                 }
 559
 560                 g_array_free(dev_opts, TRUE);
 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         main_loop = g_main_loop_new(NULL, FALSE);
 686
 687         sr_session_stopped_callback_set(session,
 688                 (sr_session_stopped_callback)g_main_loop_quit, main_loop);
 689
 690         if (sr_session_start(session) != SR_OK) {
 691                 g_critical("Failed to start session.");
 692                 g_main_loop_unref(main_loop);
 693                 sr_session_destroy(session);
 694                 return;
 695         }
 696
 697         if (opt_continuous)
 698                 add_anykey(session);
 699
 700         g_main_loop_run(main_loop);
 701
 702         if (opt_continuous)
 703                 clear_anykey();
 704
 705         if (trigger)
 706                 sr_trigger_free(trigger);
 707
 708         sr_session_datafeed_callback_remove_all(session);
 709         g_main_loop_unref(main_loop);
 710         sr_session_destroy(session);
 711 }