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