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         /* Avoid warnings when building without decoder support. */
 179         (void)session;
 180         (void)input_len;
 181
 182         driver = sr_dev_inst_driver_get(sdi);
 183
 184         /* If the first packet to come in isn't a header, don't even try. */
 185         if (packet->type != SR_DF_HEADER && !o)
 186                 return;
 187
 188         session = cb_data;
 189         switch (packet->type) {
 190         case SR_DF_HEADER:
 191                 g_debug("cli: Received SR_DF_HEADER.");
 192                 if (!(o = setup_output_format(sdi, &outfile)))
 193                         g_critical("Failed to initialize output module.");
 194
 195                 /* Set up backup analog output module. */
 196                 if (outfile)
 197                         oa = sr_output_new(sr_output_find("analog"), NULL,
 198                                         sdi, NULL);
 199
 200                 rcvd_samples_logic = rcvd_samples_analog = 0;
 201
 202                 if (maybe_config_get(driver, sdi, NULL, SR_CONF_SAMPLERATE,
 203                                 &gvar) == SR_OK) {
 204                         samplerate = g_variant_get_uint64(gvar);
 205                         g_variant_unref(gvar);
 206                 }
 207
 208 #ifdef HAVE_SRD
 209                 if (opt_pds) {
 210                         if (samplerate) {
 211                                 if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 212                                                 g_variant_new_uint64(samplerate)) != SRD_OK) {
 213                                         g_critical("Failed to configure decode session.");
 214                                         break;
 215                                 }
 216                         }
 217                         if (srd_session_start(srd_sess) != SRD_OK) {
 218                                 g_critical("Failed to start decode session.");
 219                                 break;
 220                         }
 221                 }
 222 #endif
 223                 break;
 224
 225         case SR_DF_META:
 226                 g_debug("cli: Received SR_DF_META.");
 227                 meta = packet->payload;
 228                 for (l = meta->config; l; l = l->next) {
 229                         src = l->data;
 230                         switch (src->key) {
 231                         case SR_CONF_SAMPLERATE:
 232                                 samplerate = g_variant_get_uint64(src->data);
 233                                 g_debug("cli: Got samplerate %"PRIu64" Hz.", samplerate);
 234 #ifdef HAVE_SRD
 235                                 if (opt_pds) {
 236                                         if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
 237                                                         g_variant_new_uint64(samplerate)) != SRD_OK) {
 238                                                 g_critical("Failed to pass samplerate to decoder.");
 239                                         }
 240                                 }
 241 #endif
 242                                 break;
 243                         case SR_CONF_SAMPLE_INTERVAL:
 244                                 samplerate = g_variant_get_uint64(src->data);
 245                                 g_debug("cli: Got sample interval %"PRIu64" ms.", samplerate);
 246                                 break;
 247                         default:
 248                                 /* Unknown metadata is not an error. */
 249                                 break;
 250                         }
 251                 }
 252                 break;
 253
 254         case SR_DF_TRIGGER:
 255                 g_debug("cli: Received SR_DF_TRIGGER.");
 256                 triggered = 1;
 257                 break;
 258
 259         case SR_DF_LOGIC:
 260                 logic = packet->payload;
 261                 g_message("cli: Received SR_DF_LOGIC (%"PRIu64" bytes, unitsize = %d).",
 262                                 logic->length, logic->unitsize);
 263                 if (logic->length == 0)
 264                         break;
 265
 266                 /* Don't store any samples until triggered. */
 267                 if (opt_wait_trigger && !triggered)
 268                         break;
 269
 270                 if (limit_samples && rcvd_samples_logic >= limit_samples)
 271                         break;
 272
 273                 end_sample = rcvd_samples_logic + logic->length / logic->unitsize;
 274                 /* Cut off last packet according to the sample limit. */
 275                 if (limit_samples && end_sample > limit_samples)
 276                         end_sample = limit_samples;
 277                 input_len = (end_sample - rcvd_samples_logic) * logic->unitsize;
 278
 279                 if (opt_pds) {
 280 #ifdef HAVE_SRD
 281                         if (srd_session_send(srd_sess, rcvd_samples_logic, end_sample,
 282                                         logic->data, input_len, logic->unitsize) != SRD_OK)
 283                                 sr_session_stop(session);
 284 #endif
 285                 }
 286
 287                 rcvd_samples_logic = end_sample;
 288                 break;
 289
 290         case SR_DF_ANALOG:
 291                 analog = packet->payload;
 292                 g_message("cli: Received SR_DF_ANALOG (%d samples).", analog->num_samples);
 293                 if (analog->num_samples == 0)
 294                         break;
 295
 296                 if (limit_samples && rcvd_samples_analog >= limit_samples)
 297                         break;
 298
 299                 rcvd_samples_analog += analog->num_samples;
 300                 break;
 301
 302         case SR_DF_FRAME_BEGIN:
 303                 g_debug("cli: Received SR_DF_FRAME_BEGIN.");
 304                 break;
 305
 306         case SR_DF_FRAME_END:
 307                 g_debug("cli: Received SR_DF_FRAME_END.");
 308                 break;
 309
 310         default:
 311                 break;
 312         }
 313
 314         if (o && !opt_pds) {
 315                 if (sr_output_send(o, packet, &out) == SR_OK) {
 316                         if (oa && !out) {
 317                                 /*
 318                                  * The user didn't specify an output module,
 319                                  * but needs to see this analog data.
 320                                  */
 321                                 sr_output_send(oa, packet, &out);
 322                         }
 323                         if (outfile && out && out->len > 0) {
 324                                 fwrite(out->str, 1, out->len, outfile);
 325                                 fflush(outfile);
 326                         }
 327                         if (out)
 328                                 g_string_free(out, TRUE);
 329                 }
 330         }
 331
 332         /*
 333          * SR_DF_END needs to be handled after the output module's receive()
 334          * is called, so it can properly clean up that module.
 335          */
 336         if (packet->type == SR_DF_END) {
 337                 g_debug("cli: Received SR_DF_END.");
 338
 339                 if (o)
 340                         sr_output_free(o);
 341                 o = NULL;
 342
 343                 if (oa)
 344                         sr_output_free(oa);
 345                 oa = NULL;
 346
 347                 if (outfile && outfile != stdout)
 348                         fclose(outfile);
 349
 350                 if (limit_samples) {
 351                         if (rcvd_samples_logic > 0 && rcvd_samples_logic < limit_samples)
 352                                 g_warning("Device only sent %" PRIu64 " samples.",
 353                                            rcvd_samples_logic);
 354                         else if (rcvd_samples_analog > 0 && rcvd_samples_analog < limit_samples)
 355                                 g_warning("Device only sent %" PRIu64 " samples.",
 356                                            rcvd_samples_analog);
 357                 }
 358         }
 359
 360 }
 361
 362 int opt_to_gvar(char *key, char *value, struct sr_config *src)
 363 {
 364         const struct sr_key_info *srci, *srmqi;
 365         double tmp_double, dlow, dhigh;
 366         uint64_t tmp_u64, p, q, low, high, mqflags;
 367         uint32_t mq;
 368         GVariant *rational[2], *range[2], *gtup[2];
 369         GVariantBuilder *vbl;
 370         gboolean tmp_bool;
 371         gchar **keyval;
 372         int ret, i;
 373
 374         if (!(srci = sr_key_info_name_get(SR_KEY_CONFIG, key))) {
 375                 g_critical("Unknown device option '%s'.", (char *) key);
 376                 return -1;
 377         }
 378         src->key = srci->key;
 379
 380         if ((!value || strlen(value) == 0) &&
 381                 (srci->datatype != SR_T_BOOL)) {
 382                 g_critical("Option '%s' needs a value.", (char *)key);
 383                 return -1;
 384         }
 385
 386         ret = 0;
 387         switch (srci->datatype) {
 388         case SR_T_UINT64:
 389                 ret = sr_parse_sizestring(value, &tmp_u64);
 390                 if (ret != 0)
 391                         break;
 392                 src->data = g_variant_new_uint64(tmp_u64);
 393                 break;
 394         case SR_T_INT32:
 395                 ret = sr_parse_sizestring(value, &tmp_u64);
 396                 if (ret != 0)
 397                         break;
 398                 src->data = g_variant_new_int32(tmp_u64);
 399                 break;
 400         case SR_T_STRING:
 401                 src->data = g_variant_new_string(value);
 402                 break;
 403         case SR_T_BOOL:
 404                 if (!value)
 405                         tmp_bool = TRUE;
 406                 else
 407                         tmp_bool = sr_parse_boolstring(value);
 408                 src->data = g_variant_new_boolean(tmp_bool);
 409                 break;
 410         case SR_T_FLOAT:
 411                 tmp_double = strtof(value, NULL);
 412                 src->data = g_variant_new_double(tmp_double);
 413                 break;
 414         case SR_T_RATIONAL_PERIOD:
 415                 if ((ret = sr_parse_period(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_RATIONAL_VOLT:
 422                 if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
 423                         break;
 424                 rational[0] = g_variant_new_uint64(p);
 425                 rational[1] = g_variant_new_uint64(q);
 426                 src->data = g_variant_new_tuple(rational, 2);
 427                 break;
 428         case SR_T_UINT64_RANGE:
 429                 if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
 430                         ret = -1;
 431                         break;
 432                 } else {
 433                         range[0] = g_variant_new_uint64(low);
 434                         range[1] = g_variant_new_uint64(high);
 435                         src->data = g_variant_new_tuple(range, 2);
 436                 }
 437                 break;
 438         case SR_T_DOUBLE_RANGE:
 439                 if (sscanf(value, "%lf-%lf", &dlow, &dhigh) != 2) {
 440                         ret = -1;
 441                         break;
 442                 } else {
 443                         range[0] = g_variant_new_double(dlow);
 444                         range[1] = g_variant_new_double(dhigh);
 445                         src->data = g_variant_new_tuple(range, 2);
 446                 }
 447                 break;
 448         case SR_T_KEYVALUE:
 449                 /* Expects the argument to be in the form of key=value. */
 450                 keyval = g_strsplit(value, "=", 2);
 451                 if (!keyval[0] || !keyval[1]) {
 452                         g_strfreev(keyval);
 453                         ret = -1;
 454                         break;
 455                 } else {
 456                         vbl = g_variant_builder_new(G_VARIANT_TYPE_DICTIONARY);
 457                         g_variant_builder_add(vbl, "{ss}",
 458                                               keyval[0], keyval[1]);
 459                         src->data = g_variant_builder_end(vbl);
 460                         g_strfreev(keyval);
 461                 }
 462                 break;
 463         case SR_T_MQ:
 464                 /*
 465                   Argument is MQ id e.g. ("voltage") optionally followed by one
 466                   or more /<mqflag> e.g. "/ac".
 467                  */
 468                 keyval = g_strsplit(value, "/", 0);
 469                 if (!keyval[0] || !(srmqi = sr_key_info_name_get(SR_KEY_MQ, keyval[0]))) {
 470                         g_strfreev(keyval);
 471                         ret = -1;
 472                         break;
 473                 }
 474                 mq = srmqi->key;
 475                 mqflags = 0;
 476                 for (i = 1; keyval[i]; i++) {
 477                         if (!(srmqi = sr_key_info_name_get(SR_KEY_MQFLAGS, keyval[i]))) {
 478                                 ret = -1;
 479                                 break;
 480                         }
 481                         mqflags |= srmqi->key;
 482                 }
 483                 g_strfreev(keyval);
 484                 if (ret != -1) {
 485                         gtup[0] = g_variant_new_uint32(mq);
 486                         gtup[1] = g_variant_new_uint64(mqflags);
 487                         src->data = g_variant_new_tuple(gtup, 2);
 488                 }
 489                 break;
 490         default:
 491                 g_critical("Unknown data type specified for option '%s' "
 492                            "(driver implementation bug?).", key);
 493                 ret = -1;
 494         }
 495
 496         if (ret < 0)
 497                 g_critical("Invalid value: '%s' for option '%s'", value, key);
 498
 499         return ret;
 500 }
 501
 502 int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
 503 {
 504         struct sr_config src;
 505         struct sr_channel_group *cg;
 506         GHashTableIter iter;
 507         gpointer key, value;
 508         int ret;
 509
 510         g_hash_table_iter_init(&iter, args);
 511         while (g_hash_table_iter_next(&iter, &key, &value)) {
 512                 if ((ret = opt_to_gvar(key, value, &src)) != 0)
 513                         return ret;
 514                 cg = select_channel_group(sdi);
 515                 if ((ret = maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, cg,
 516                                 src.key, src.data)) != SR_OK) {
 517                         g_critical("Failed to set device option '%s': %s.",
 518                                    (char *)key, sr_strerror(ret));
 519                         return ret;
 520                 }
 521         }
 522
 523         return SR_OK;
 524 }
 525
 526 void run_session(void)
 527 {
 528         GSList *devices, *real_devices, *sd;
 529         GHashTable *devargs;
 530         GVariant *gvar;
 531         struct sr_session *session;
 532         struct sr_trigger *trigger;
 533         struct sr_dev_inst *sdi;
 534         uint64_t min_samples, max_samples;
 535         GArray *drv_opts;
 536         guint i;
 537         int is_demo_dev;
 538         struct sr_dev_driver *driver;
 539         const struct sr_transform *t;
 540         GMainLoop *main_loop;
 541
 542         devices = device_scan();
 543         if (!devices) {
 544                 g_critical("No devices found.");
 545                 return;
 546         }
 547
 548         real_devices = NULL;
 549         for (sd = devices; sd; sd = sd->next) {
 550                 sdi = sd->data;
 551
 552                 driver = sr_dev_inst_driver_get(sdi);
 553
 554                 if (!(drv_opts = sr_dev_options(driver, NULL, NULL))) {
 555                         g_critical("Failed to query list of driver options.");
 556                         return;
 557                 }
 558
 559                 is_demo_dev = 0;
 560                 for (i = 0; i < drv_opts->len; i++) {
 561                         if (g_array_index(drv_opts, uint32_t, i) == SR_CONF_DEMO_DEV)
 562                                 is_demo_dev = 1;
 563                 }
 564
 565                 g_array_free(drv_opts, TRUE);
 566
 567                 if (!is_demo_dev)
 568                         real_devices = g_slist_append(real_devices, sdi);
 569         }
 570
 571         if (g_slist_length(devices) > 1) {
 572                 if (g_slist_length(real_devices) != 1) {
 573                         g_critical("sigrok-cli only supports one device for capturing.");
 574                         return;
 575                 } else {
 576                         /* We only have one non-demo device. */
 577                         g_slist_free(devices);
 578                         devices = real_devices;
 579                         real_devices = NULL;
 580                 }
 581         }
 582
 583         sdi = devices->data;
 584         g_slist_free(devices);
 585         g_slist_free(real_devices);
 586
 587         sr_session_new(sr_ctx, &session);
 588         sr_session_datafeed_callback_add(session, datafeed_in, NULL);
 589
 590         if (sr_dev_open(sdi) != SR_OK) {
 591                 g_critical("Failed to open device.");
 592                 return;
 593         }
 594
 595         if (sr_session_dev_add(session, sdi) != SR_OK) {
 596                 g_critical("Failed to add device to session.");
 597                 sr_session_destroy(session);
 598                 return;
 599         }
 600
 601         if (opt_config) {
 602                 if ((devargs = parse_generic_arg(opt_config, FALSE))) {
 603                         if (set_dev_options(sdi, devargs) != SR_OK)
 604                                 return;
 605                         g_hash_table_destroy(devargs);
 606                 }
 607         }
 608
 609         if (select_channels(sdi) != SR_OK) {
 610                 g_critical("Failed to set channels.");
 611                 sr_session_destroy(session);
 612                 return;
 613         }
 614
 615         trigger = NULL;
 616         if (opt_triggers) {
 617                 if (!parse_triggerstring(sdi, opt_triggers, &trigger)) {
 618                         sr_session_destroy(session);
 619                         return;
 620                 }
 621                 if (sr_session_trigger_set(session, trigger) != SR_OK) {
 622                         sr_session_destroy(session);
 623                         return;
 624                 }
 625         }
 626
 627         if (opt_continuous) {
 628                 if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
 629                         g_critical("This device does not support continuous sampling.");
 630                         sr_session_destroy(session);
 631                         return;
 632                 }
 633         }
 634
 635         if (opt_time) {
 636                 if (set_limit_time(sdi) != SR_OK) {
 637                         sr_session_destroy(session);
 638                         return;
 639                 }
 640         }
 641
 642         if (opt_samples) {
 643                 if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
 644                         g_critical("Invalid sample limit '%s'.", opt_samples);
 645                         sr_session_destroy(session);
 646                         return;
 647                 }
 648                 if (maybe_config_list(driver, sdi, NULL, SR_CONF_LIMIT_SAMPLES,
 649                                 &gvar) == SR_OK) {
 650                         /*
 651                          * The device has no compression, or compression is turned
 652                          * off, and publishes its sample memory size.
 653                          */
 654                         g_variant_get(gvar, "(tt)", &min_samples, &max_samples);
 655                         g_variant_unref(gvar);
 656                         if (limit_samples < min_samples) {
 657                                 g_critical("The device stores at least %"PRIu64
 658                                                 " samples with the current settings.", min_samples);
 659                         }
 660                         if (limit_samples > max_samples) {
 661                                 g_critical("The device can store only %"PRIu64
 662                                                 " samples with the current settings.", max_samples);
 663                         }
 664                 }
 665                 gvar = g_variant_new_uint64(limit_samples);
 666                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
 667                         g_critical("Failed to configure sample limit.");
 668                         sr_session_destroy(session);
 669                         return;
 670                 }
 671         }
 672
 673         if (opt_frames) {
 674                 if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
 675                         g_critical("Invalid sample limit '%s'.", opt_samples);
 676                         sr_session_destroy(session);
 677                         return;
 678                 }
 679                 gvar = g_variant_new_uint64(limit_frames);
 680                 if (maybe_config_set(sr_dev_inst_driver_get(sdi), sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
 681                         g_critical("Failed to configure frame limit.");
 682                         sr_session_destroy(session);
 683                         return;
 684                 }
 685         }
 686
 687         if (!(t = setup_transform_module(sdi)))
 688                 g_critical("Failed to initialize transform module.");
 689
 690         main_loop = g_main_loop_new(NULL, FALSE);
 691
 692         sr_session_stopped_callback_set(session,
 693                 (sr_session_stopped_callback)g_main_loop_quit, main_loop);
 694
 695         if (sr_session_start(session) != SR_OK) {
 696                 g_critical("Failed to start session.");
 697                 g_main_loop_unref(main_loop);
 698                 sr_session_destroy(session);
 699                 return;
 700         }
 701
 702         if (opt_continuous)
 703                 add_anykey(session);
 704
 705         g_main_loop_run(main_loop);
 706
 707         if (opt_continuous)
 708                 clear_anykey();
 709
 710         if (trigger)
 711                 sr_trigger_free(trigger);
 712
 713         sr_session_datafeed_callback_remove_all(session);
 714         g_main_loop_unref(main_loop);
 715         sr_session_destroy(session);
 716 }