sigrok-cli.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2012 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 <sigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25 #include <time.h>
  26 #include <sys/time.h>
  27 #include <inttypes.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <errno.h>
  31 #include <glib.h>
  32 #include <glib/gstdio.h>
  33 #include <sigrok.h>
  34 #include "sigrok-cli.h"
  35 #include "config.h"
  36
  37 #define DEFAULT_OUTPUT_FORMAT "bits:width=64"
  38
  39 extern struct sr_hwcap_option sr_hwcap_options[];
  40
  41 static uint64_t limit_samples = 0;
  42 static struct sr_output_format *output_format = NULL;
  43 static int default_output_format = FALSE;
  44 static char *output_format_param = NULL;
  45 static char *input_format_param = NULL;
  46 static GData *pd_ann_visible = NULL;
  47
  48 static gboolean opt_version = FALSE;
  49 static gint opt_loglevel = SR_LOG_WARN; /* Show errors+warnings per default. */
  50 static gboolean opt_list_devs = FALSE;
  51 static gboolean opt_wait_trigger = FALSE;
  52 static gchar *opt_input_file = NULL;
  53 static gchar *opt_output_file = NULL;
  54 static gchar *opt_dev = NULL;
  55 static gchar *opt_probes = NULL;
  56 static gchar *opt_triggers = NULL;
  57 static gchar *opt_pds = NULL;
  58 static gchar *opt_pd_stack = NULL;
  59 static gchar *opt_input_format = NULL;
  60 static gchar *opt_output_format = NULL;
  61 static gchar *opt_time = NULL;
  62 static gchar *opt_samples = NULL;
  63 static gchar *opt_continuous = NULL;
  64
  65 static GOptionEntry optargs[] = {
  66         {"version", 'V', 0, G_OPTION_ARG_NONE, &opt_version, "Show version and support list", NULL},
  67         {"loglevel", 'l', 0, G_OPTION_ARG_INT, &opt_loglevel, "Select libsigrok/libsigrokdecode loglevel", NULL},
  68         {"list-devices", 'D', 0, G_OPTION_ARG_NONE, &opt_list_devs, "Scan for devices", NULL},
  69         {"device", 'd', 0, G_OPTION_ARG_STRING, &opt_dev, "Use specified device", NULL},
  70         {"input-file", 'i', 0, G_OPTION_ARG_FILENAME, &opt_input_file, "Load input from file", NULL},
  71         {"input-format", 'I', 0, G_OPTION_ARG_STRING, &opt_input_format, "Input format", NULL},
  72         {"output-file", 'o', 0, G_OPTION_ARG_FILENAME, &opt_output_file, "Save output to file", NULL},
  73         {"output-format", 'O', 0, G_OPTION_ARG_STRING, &opt_output_format, "Output format", NULL},
  74         {"probes", 'p', 0, G_OPTION_ARG_STRING, &opt_probes, "Probes to use", NULL},
  75         {"triggers", 't', 0, G_OPTION_ARG_STRING, &opt_triggers, "Trigger configuration", NULL},
  76         {"wait-trigger", 'w', 0, G_OPTION_ARG_NONE, &opt_wait_trigger, "Wait for trigger", NULL},
  77         {"protocol-decoders", 'a', 0, G_OPTION_ARG_STRING, &opt_pds, "Protocol decoders to run", NULL},
  78         {"protocol-decoder-stack", 's', 0, G_OPTION_ARG_STRING, &opt_pd_stack, "Protocol decoder stack", NULL},
  79         {"time", 0, 0, G_OPTION_ARG_STRING, &opt_time, "How long to sample (ms)", NULL},
  80         {"samples", 0, 0, G_OPTION_ARG_STRING, &opt_samples, "Number of samples to acquire", NULL},
  81         {"continuous", 0, 0, G_OPTION_ARG_NONE, &opt_continuous, "Sample continuously", NULL},
  82         {NULL, 0, 0, 0, NULL, NULL, NULL}
  83 };
  84
  85 static void show_version(void)
  86 {
  87         GSList *l;
  88         struct sr_dev_driver **drivers;
  89         struct sr_input_format **inputs;
  90         struct sr_output_format **outputs;
  91         struct srd_decoder *dec;
  92         int i;
  93
  94         printf("sigrok-cli %s\n\n", VERSION);
  95
  96         printf("Using libsigrok %s (lib version %s).\n",
  97                sr_package_version_string_get(), sr_lib_version_string_get());
  98         printf("Using libsigrokdecode %s (lib version %s).\n\n",
  99                srd_package_version_string_get(), srd_lib_version_string_get());
 100
 101         printf("Supported hardware drivers:\n");
 102         drivers = sr_driver_list();
 103         for (i = 0; drivers[i]; i++) {
 104                 printf("  %-20s %s\n", drivers[i]->name, drivers[i]->longname);
 105         }
 106         printf("\n");
 107
 108         printf("Supported input formats:\n");
 109         inputs = sr_input_list();
 110         for (i = 0; inputs[i]; i++)
 111                 printf("  %-20s %s\n", inputs[i]->id, inputs[i]->description);
 112         printf("\n");
 113
 114         printf("Supported output formats:\n");
 115         outputs = sr_output_list();
 116         for (i = 0; outputs[i]; i++)
 117                 printf("  %-20s %s\n", outputs[i]->id, outputs[i]->description);
 118         printf("\n");
 119
 120         if (srd_init(NULL) == SRD_OK) {
 121                 printf("Supported protocol decoders:\n");
 122                 srd_decoder_load_all();
 123                 for (l = srd_decoder_list(); l; l = l->next) {
 124                         dec = l->data;
 125                         printf("  %-20s %s\n", dec->id, dec->longname);
 126                         /* Print protocol description upon "-l 3" or higher. */
 127                         if (opt_loglevel >= SR_LOG_INFO)
 128                                 printf("  %-20s %s\n", "", dec->desc);
 129                 }
 130                 srd_exit();
 131         }
 132         printf("\n");
 133 }
 134
 135 static void print_dev_line(const struct sr_dev *dev)
 136 {
 137         const struct sr_dev_inst *sdi;
 138
 139         sr_dev_info_get(dev, SR_DI_INST, (const void **)&sdi);
 140
 141         if (sdi->vendor && sdi->vendor[0])
 142                 printf("%s ", sdi->vendor);
 143         if (sdi->model && sdi->model[0])
 144                 printf("%s ", sdi->model);
 145         if (sdi->version && sdi->version[0])
 146                 printf("%s ", sdi->version);
 147         if (dev->probes)
 148                 printf("with %d probes", g_slist_length(dev->probes));
 149         printf("\n");
 150 }
 151
 152 static void show_dev_list(void)
 153 {
 154         struct sr_dev *dev, *demo_dev;
 155         GSList *devs, *l;
 156         int devcnt;
 157
 158         devcnt = 0;
 159         devs = sr_dev_list();
 160
 161         if (g_slist_length(devs) == 0)
 162                 return;
 163
 164         printf("The following devices were found:\nID    Device\n");
 165         demo_dev = NULL;
 166         for (l = devs; l; l = l->next) {
 167                 dev = l->data;
 168                 if (sr_dev_has_hwcap(dev, SR_HWCAP_DEMO_DEV)) {
 169                         demo_dev = dev;
 170                         continue;
 171                 }
 172                 printf("%-3d   ", devcnt++);
 173                 print_dev_line(dev);
 174         }
 175         if (demo_dev) {
 176                 printf("demo  ");
 177                 print_dev_line(demo_dev);
 178         }
 179 }
 180
 181 static void show_dev_detail(void)
 182 {
 183         struct sr_dev *dev;
 184         struct sr_hwcap_option *hwo;
 185         const struct sr_samplerates *samplerates;
 186         int cap, *hwcaps, i;
 187         char *s, *title;
 188         const char *charopts, **stropts;
 189
 190         dev = parse_devstring(opt_dev);
 191         if (!dev) {
 192                 printf("No such device. Use -D to list all devices.\n");
 193                 return;
 194         }
 195
 196         print_dev_line(dev);
 197
 198         if (sr_dev_info_get(dev, SR_DI_TRIGGER_TYPES,
 199                                         (const void **)&charopts) == SR_OK) {
 200                 printf("Supported triggers: ");
 201                 while (*charopts) {
 202                         printf("%c ", *charopts);
 203                         charopts++;
 204                 }
 205                 printf("\n");
 206         }
 207
 208         title = "Supported options:\n";
 209         hwcaps = dev->driver->hwcap_get_all();
 210         for (cap = 0; hwcaps[cap]; cap++) {
 211                 if (!(hwo = sr_hw_hwcap_get(hwcaps[cap])))
 212                         continue;
 213
 214                 if (title) {
 215                         printf("%s", title);
 216                         title = NULL;
 217                 }
 218
 219                 if (hwo->hwcap == SR_HWCAP_PATTERN_MODE) {
 220                         printf("    %s", hwo->shortname);
 221                         if (sr_dev_info_get(dev, SR_DI_PATTERNS,
 222                                         (const void **)&stropts) == SR_OK) {
 223                                 printf(" - supported patterns:\n");
 224                                 for (i = 0; stropts[i]; i++)
 225                                         printf("      %s\n", stropts[i]);
 226                         } else {
 227                                 printf("\n");
 228                         }
 229                 } else if (hwo->hwcap == SR_HWCAP_SAMPLERATE) {
 230                         printf("    %s", hwo->shortname);
 231                         /* Supported samplerates */
 232                         if (sr_dev_info_get(dev, SR_DI_SAMPLERATES,
 233                                         (const void **)&samplerates) != SR_OK) {
 234                                 printf("\n");
 235                                 continue;
 236                         }
 237
 238                         if (samplerates->step) {
 239                                 /* low */
 240                                 if (!(s = sr_samplerate_string(samplerates->low)))
 241                                         continue;
 242                                 printf(" (%s", s);
 243                                 g_free(s);
 244                                 /* high */
 245                                 if (!(s = sr_samplerate_string(samplerates->high)))
 246                                         continue;
 247                                 printf(" - %s", s);
 248                                 g_free(s);
 249                                 /* step */
 250                                 if (!(s = sr_samplerate_string(samplerates->step)))
 251                                         continue;
 252                                 printf(" in steps of %s)\n", s);
 253                                 g_free(s);
 254                         } else {
 255                                 printf(" - supported samplerates:\n");
 256                                 for (i = 0; samplerates->list[i]; i++) {
 257                                         printf("      %s\n", sr_samplerate_string(samplerates->list[i]));
 258                                 }
 259                         }
 260                 } else {
 261                         printf("    %s\n", hwo->shortname);
 262                 }
 263         }
 264 }
 265
 266 static void show_pd_detail(void)
 267 {
 268         GSList *l;
 269         struct srd_decoder *dec;
 270         char **pdtokens, **pdtok, **ann, *doc;
 271         struct srd_probe *p;
 272
 273         pdtokens = g_strsplit(opt_pds, ",", -1);
 274         for (pdtok = pdtokens; *pdtok; pdtok++) {
 275                 if (!(dec = srd_decoder_get_by_id(*pdtok))) {
 276                         printf("Protocol decoder %s not found.", *pdtok);
 277                         return;
 278                 }
 279                 printf("ID: %s\nName: %s\nLong name: %s\nDescription: %s\n",
 280                                 dec->id, dec->name, dec->longname, dec->desc);
 281                 printf("License: %s\n", dec->license);
 282                 printf("Annotations:\n");
 283                 if (dec->annotations) {
 284                         for (l = dec->annotations; l; l = l->next) {
 285                                 ann = l->data;
 286                                 printf("- %s\n  %s\n", ann[0], ann[1]);
 287                         }
 288                 } else {
 289                         printf("None.\n");
 290                 }
 291                 /* TODO: Print supported decoder options. */
 292                 printf("Required probes:\n");
 293                 if (dec->probes) {
 294                         for (l = dec->probes; l; l = l->next) {
 295                                 p = l->data;
 296                                 printf("- %s (%s): %s\n",
 297                                        p->name, p->id, p->desc);
 298                         }
 299                 } else {
 300                         printf("None.\n");
 301                 }
 302                 printf("Optional probes:\n");
 303                 if (dec->opt_probes) {
 304                         for (l = dec->opt_probes; l; l = l->next) {
 305                                 p = l->data;
 306                                 printf("- %s (%s): %s\n",
 307                                        p->name, p->id, p->desc);
 308                         }
 309                 } else {
 310                         printf("None.\n");
 311                 }
 312                 if ((doc = srd_decoder_doc_get(dec))) {
 313                         printf("Documentation:\n%s\n",
 314                                doc[0] == '\n' ? doc + 1 : doc);
 315                         g_free(doc);
 316                 }
 317         }
 318
 319         g_strfreev(pdtokens);
 320 }
 321
 322 static void datafeed_in(struct sr_dev *dev, struct sr_datafeed_packet *packet)
 323 {
 324         static struct sr_output *o = NULL;
 325         static int probelist[SR_MAX_NUM_PROBES + 1] = { 0 };
 326         static uint64_t received_samples = 0;
 327         static int unitsize = 0;
 328         static int triggered = 0;
 329         static FILE *outfile = NULL;
 330         struct sr_probe *probe;
 331         struct sr_datafeed_header *header;
 332         struct sr_datafeed_logic *logic;
 333         int num_enabled_probes, sample_size, ret, i;
 334         uint64_t output_len, filter_out_len;
 335         uint8_t *output_buf, *filter_out;
 336
 337         /* If the first packet to come in isn't a header, don't even try. */
 338         if (packet->type != SR_DF_HEADER && o == NULL)
 339                 return;
 340
 341         sample_size = -1;
 342         switch (packet->type) {
 343         case SR_DF_HEADER:
 344                 g_debug("cli: Received SR_DF_HEADER");
 345                 /* Initialize the output module. */
 346                 if (!(o = g_try_malloc(sizeof(struct sr_output)))) {
 347                         g_critical("Output module malloc failed.");
 348                         exit(1);
 349                 }
 350                 o->format = output_format;
 351                 o->dev = dev;
 352                 o->param = output_format_param;
 353                 if (o->format->init) {
 354                         if (o->format->init(o) != SR_OK) {
 355                                 g_critical("Output format initialization failed.");
 356                                 exit(1);
 357                         }
 358                 }
 359
 360                 header = packet->payload;
 361                 num_enabled_probes = 0;
 362                 for (i = 0; i < header->num_logic_probes; i++) {
 363                         probe = g_slist_nth_data(dev->probes, i);
 364                         if (probe->enabled)
 365                                 probelist[num_enabled_probes++] = probe->index;
 366                 }
 367                 /* How many bytes we need to store num_enabled_probes bits */
 368                 unitsize = (num_enabled_probes + 7) / 8;
 369
 370                 outfile = stdout;
 371                 if (opt_output_file) {
 372                         if (default_output_format) {
 373                                 /* output file is in session format, which means we'll
 374                                  * dump everything in the datastore as it comes in,
 375                                  * and save from there after the session. */
 376                                 outfile = NULL;
 377                                 ret = sr_datastore_new(unitsize, &(dev->datastore));
 378                                 if (ret != SR_OK) {
 379                                         g_critical("Failed to create datastore.");
 380                                         exit(1);
 381                                 }
 382                         } else {
 383                                 /* saving to a file in whatever format was set
 384                                  * with -O, so all we need is a filehandle */
 385                                 outfile = g_fopen(opt_output_file, "wb");
 386                         }
 387                 }
 388                 if (opt_pds) {
 389                         if (srd_session_start(num_enabled_probes, unitsize,
 390                                         header->samplerate) != SRD_OK)
 391                                 sr_session_halt();
 392                 }
 393                 break;
 394         case SR_DF_END:
 395                 g_debug("cli: Received SR_DF_END");
 396                 if (!o) {
 397                         g_debug("cli: double end!");
 398                         break;
 399                 }
 400                 if (o->format->event) {
 401                         o->format->event(o, SR_DF_END, &output_buf, &output_len);
 402                         if (output_len) {
 403                                 if (outfile)
 404                                         fwrite(output_buf, 1, output_len, outfile);
 405                                 g_free(output_buf);
 406                                 output_len = 0;
 407                         }
 408                 }
 409                 if (limit_samples && received_samples < limit_samples)
 410                         g_warning("Device only sent %" PRIu64 " samples.",
 411                                received_samples);
 412                 if (opt_continuous)
 413                         g_warning("Device stopped after %" PRIu64 " samples.",
 414                                received_samples);
 415                 sr_session_halt();
 416                 if (outfile && outfile != stdout)
 417                         fclose(outfile);
 418                 g_free(o);
 419                 o = NULL;
 420                 break;
 421         case SR_DF_TRIGGER:
 422                 g_debug("cli: received SR_DF_TRIGGER");
 423                 if (o->format->event)
 424                         o->format->event(o, SR_DF_TRIGGER, &output_buf,
 425                                          &output_len);
 426                 triggered = 1;
 427                 break;
 428         case SR_DF_LOGIC:
 429                 logic = packet->payload;
 430                 sample_size = logic->unitsize;
 431                 g_message("cli: received SR_DF_LOGIC, %"PRIu64" bytes", logic->length);
 432                 break;
 433         }
 434
 435         /* not supporting anything but SR_DF_LOGIC for now */
 436
 437         if (sample_size == -1 || logic->length == 0)
 438                 return;
 439
 440         /* Don't store any samples until triggered. */
 441         if (opt_wait_trigger && !triggered)
 442                 return;
 443
 444         if (limit_samples && received_samples >= limit_samples)
 445                 return;
 446
 447         /* TODO: filters only support SR_DF_LOGIC */
 448         ret = sr_filter_probes(sample_size, unitsize, probelist,
 449                                    logic->data, logic->length,
 450                                    &filter_out, &filter_out_len);
 451         if (ret != SR_OK)
 452                 return;
 453
 454         /* what comes out of the filter is guaranteed to be packed into the
 455          * minimum size needed to support the number of samples at this sample
 456          * size. however, the driver may have submitted too much -- cut off
 457          * the buffer of the last packet according to the sample limit.
 458          */
 459         if (limit_samples && (received_samples + logic->length / sample_size >
 460                         limit_samples * sample_size))
 461                 filter_out_len = limit_samples * sample_size - received_samples;
 462
 463         if (dev->datastore)
 464                 sr_datastore_put(dev->datastore, filter_out,
 465                                  filter_out_len, sample_size, probelist);
 466
 467         if (opt_output_file && default_output_format)
 468                 /* saving to a session file, don't need to do anything else
 469                  * to this data for now. */
 470                 goto cleanup;
 471
 472         if (opt_pds) {
 473                 if (srd_session_send(received_samples, (uint8_t*)filter_out,
 474                                 filter_out_len) != SRD_OK)
 475                         sr_session_halt();
 476         } else {
 477                 output_len = 0;
 478                 if (o->format->data && packet->type == o->format->df_type)
 479                         o->format->data(o, filter_out, filter_out_len, &output_buf, &output_len);
 480                 if (output_len) {
 481                         fwrite(output_buf, 1, output_len, outfile);
 482                         g_free(output_buf);
 483                 }
 484         }
 485
 486 cleanup:
 487         g_free(filter_out);
 488         received_samples += logic->length / sample_size;
 489 }
 490
 491 /* Register the given PDs for this session.
 492  * Accepts a string of the form: "spi:sck=3:sdata=4,spi:sck=3:sdata=5"
 493  * That will instantiate two SPI decoders on the clock but different data
 494  * lines.
 495  */
 496 static int register_pds(struct sr_dev *dev, const char *pdstring)
 497 {
 498         GHashTable *pd_opthash;
 499         struct srd_decoder_inst *di;
 500         char **pdtokens, **pdtok, *pd_name;
 501
 502         /* Avoid compiler warnings. */
 503         (void)dev;
 504
 505         g_datalist_init(&pd_ann_visible);
 506         pdtokens = g_strsplit(pdstring, ",", -1);
 507         pd_opthash = NULL;
 508         pd_name = NULL;
 509
 510         for (pdtok = pdtokens; *pdtok; pdtok++) {
 511                 if (!(pd_opthash = parse_generic_arg(*pdtok))) {
 512                         g_critical("Invalid protocol decoder option '%s'.", *pdtok);
 513                         goto err_out;
 514                 }
 515
 516                 pd_name = g_strdup(g_hash_table_lookup(pd_opthash, "sigrok_key"));
 517                 g_hash_table_remove(pd_opthash, "sigrok_key");
 518                 if (srd_decoder_load(pd_name) != SRD_OK) {
 519                         g_critical("Failed to load protocol decoder %s.", pd_name);
 520                         goto err_out;
 521                 }
 522                 if (!(di = srd_inst_new(pd_name, pd_opthash))) {
 523                         g_critical("Failed to instantiate protocol decoder %s.", pd_name);
 524                         goto err_out;
 525                 }
 526                 g_datalist_set_data(&pd_ann_visible, di->inst_id, pd_name);
 527
 528                 /* Any keys left in the options hash are probes, where the key
 529                  * is the probe name as specified in the decoder class, and the
 530                  * value is the probe number i.e. the order in which the PD's
 531                  * incoming samples are arranged. */
 532                 if (srd_inst_probe_set_all(di, pd_opthash) != SRD_OK)
 533                         goto err_out;
 534                 g_hash_table_destroy(pd_opthash);
 535                 pd_opthash = NULL;
 536         }
 537
 538 err_out:
 539         g_strfreev(pdtokens);
 540         if (pd_opthash)
 541                 g_hash_table_destroy(pd_opthash);
 542         if (pd_name)
 543                 g_free(pd_name);
 544
 545         return 0;
 546 }
 547
 548 void show_pd_annotation(struct srd_proto_data *pdata, void *cb_data)
 549 {
 550         int i;
 551         char **annotations;
 552
 553         /* 'cb_data' is not used in this specific callback. */
 554         (void)cb_data;
 555
 556         if (pdata->ann_format != 0) {
 557                 /* CLI only shows the default annotation format. */
 558                 return;
 559         }
 560
 561         if (!g_datalist_get_data(&pd_ann_visible, pdata->pdo->di->inst_id)) {
 562                 /* Not in the list of PDs whose annotations we're showing. */
 563                 return;
 564         }
 565
 566         annotations = pdata->data;
 567         if (opt_loglevel > SR_LOG_WARN)
 568                 printf("%"PRIu64"-%"PRIu64" ", pdata->start_sample, pdata->end_sample);
 569         printf("%s: ", pdata->pdo->proto_id);
 570         for (i = 0; annotations[i]; i++)
 571                 printf("\"%s\" ", annotations[i]);
 572         printf("\n");
 573 }
 574
 575 static int select_probes(struct sr_dev *dev)
 576 {
 577         struct sr_probe *probe;
 578         char **probelist;
 579         int max_probes, i;
 580
 581         if (!opt_probes)
 582                 return SR_OK;
 583
 584         /*
 585          * This only works because a device by default initializes
 586          * and enables all its probes.
 587          */
 588         max_probes = g_slist_length(dev->probes);
 589         probelist = parse_probestring(max_probes, opt_probes);
 590         if (!probelist) {
 591                 return SR_ERR;
 592         }
 593
 594         for (i = 0; i < max_probes; i++) {
 595                 if (probelist[i]) {
 596                         sr_dev_probe_name_set(dev, i + 1, probelist[i]);
 597                         g_free(probelist[i]);
 598                 } else {
 599                         probe = sr_dev_probe_find(dev, i + 1);
 600                         probe->enabled = FALSE;
 601                 }
 602         }
 603         g_free(probelist);
 604
 605         return SR_OK;
 606 }
 607
 608 /**
 609  * Return the input file format which the CLI tool should use.
 610  *
 611  * If the user specified -I / --input-format, use that one. Otherwise, try to
 612  * autodetect the format as good as possible. Failing that, return NULL.
 613  *
 614  * @param filename The filename of the input file. Must not be NULL.
 615  * @param opt The -I / --input-file option the user specified (or NULL).
 616  *
 617  * @return A pointer to the 'struct sr_input_format' that should be used,
 618  *         or NULL if no input format was selected or auto-detected.
 619  */
 620 static struct sr_input_format *determine_input_file_format(
 621                         const char *filename, const char *opt)
 622 {
 623         int i;
 624         struct sr_input_format **inputs;
 625
 626         /* If there are no input formats, return NULL right away. */
 627         inputs = sr_input_list();
 628         if (!inputs) {
 629                 g_critical("No supported input formats available.");
 630                 return NULL;
 631         }
 632
 633         /* If the user specified -I / --input-format, use that one. */
 634         if (opt) {
 635                 for (i = 0; inputs[i]; i++) {
 636                         if (strcasecmp(inputs[i]->id, opt_input_format))
 637                                 continue;
 638                         g_debug("Using user-specified input file format '%s'.",
 639                                         inputs[i]->id);
 640                         return inputs[i];
 641                 }
 642
 643                 /* The user specified an unknown input format, return NULL. */
 644                 g_critical("Error: specified input file format '%s' is "
 645                         "unknown.", opt_input_format);
 646                 return NULL;
 647         }
 648
 649         /* Otherwise, try to find an input module that can handle this file. */
 650         for (i = 0; inputs[i]; i++) {
 651                 if (inputs[i]->format_match(filename))
 652                         break;
 653         }
 654
 655         /* Return NULL if no input module wanted to touch this. */
 656         if (!inputs[i]) {
 657                 g_critical("Error: no matching input module found.");
 658                 return NULL;
 659         }
 660
 661         return inputs[i];
 662 }
 663
 664 static void load_input_file_format(void)
 665 {
 666         struct stat st;
 667         struct sr_input *in;
 668         struct sr_input_format *input_format;
 669
 670         if (!(input_format = determine_input_file_format(opt_input_file,
 671                                                    opt_input_format)))
 672                 /* The exact cause was already logged. */
 673                 return;
 674
 675         if (stat(opt_input_file, &st) == -1) {
 676                 g_critical("Failed to load %s: %s", opt_input_file,
 677                         strerror(errno));
 678                 exit(1);
 679         }
 680
 681         /* Initialize the input module. */
 682         if (!(in = g_try_malloc(sizeof(struct sr_input)))) {
 683                 g_critical("Failed to allocate input module.");
 684                 exit(1);
 685         }
 686         in->format = input_format;
 687         in->param = input_format_param;
 688         if (in->format->init) {
 689                 if (in->format->init(in) != SR_OK) {
 690                         g_critical("Input format init failed.");
 691                         exit(1);
 692                 }
 693         }
 694
 695         if (select_probes(in->vdev) > 0)
 696             return;
 697
 698         sr_session_new();
 699         sr_session_datafeed_callback_add(datafeed_in);
 700         if (sr_session_dev_add(in->vdev) != SR_OK) {
 701                 g_critical("Failed to use device.");
 702                 sr_session_destroy();
 703                 return;
 704         }
 705
 706         input_format->loadfile(in, opt_input_file);
 707         if (opt_output_file && default_output_format) {
 708                 if (sr_session_save(opt_output_file) != SR_OK)
 709                         g_critical("Failed to save session.");
 710         }
 711         sr_session_destroy();
 712 }
 713
 714 static void load_input_file(void)
 715 {
 716
 717         if (sr_session_load(opt_input_file) == SR_OK) {
 718                 /* sigrok session file */
 719                 sr_session_datafeed_callback_add(datafeed_in);
 720                 sr_session_start();
 721                 sr_session_run();
 722                 sr_session_stop();
 723         }
 724         else {
 725                 /* fall back on input modules */
 726                 load_input_file_format();
 727         }
 728 }
 729
 730 int num_real_devs(void)
 731 {
 732         struct sr_dev *dev;
 733         GSList *devs, *l;
 734         int num_devs;
 735
 736         num_devs = 0;
 737         devs = sr_dev_list();
 738         for (l = devs; l; l = l->next) {
 739                 dev = l->data;
 740                 if (!sr_dev_has_hwcap(dev, SR_HWCAP_DEMO_DEV))
 741                         num_devs++;
 742         }
 743
 744         return num_devs;
 745 }
 746
 747 static int set_dev_options(struct sr_dev *dev, GHashTable *args)
 748 {
 749         GHashTableIter iter;
 750         gpointer key, value;
 751         int ret, i;
 752         uint64_t tmp_u64;
 753         gboolean found;
 754         gboolean tmp_bool;
 755
 756         g_hash_table_iter_init(&iter, args);
 757         while (g_hash_table_iter_next(&iter, &key, &value)) {
 758                 found = FALSE;
 759                 for (i = 0; sr_hwcap_options[i].hwcap; i++) {
 760                         if (strcmp(sr_hwcap_options[i].shortname, key))
 761                                 continue;
 762                         if ((value == NULL) &&
 763                             (sr_hwcap_options[i].type != SR_T_BOOL)) {
 764                                 g_critical("Option '%s' needs a value.", (char *)key);
 765                                 return SR_ERR;
 766                         }
 767                         found = TRUE;
 768                         switch (sr_hwcap_options[i].type) {
 769                         case SR_T_UINT64:
 770                                 ret = sr_parse_sizestring(value, &tmp_u64);
 771                                 if (ret != SR_OK)
 772                                         break;
 773                                 ret = dev->driver->dev_config_set(dev->driver_index,
 774                                         sr_hwcap_options[i].hwcap, &tmp_u64);
 775                                 break;
 776                         case SR_T_CHAR:
 777                                 ret = dev->driver->dev_config_set(dev->driver_index,
 778                                         sr_hwcap_options[i].hwcap, value);
 779                                 break;
 780                         case SR_T_BOOL:
 781                                 if (!value)
 782                                         tmp_bool = TRUE;
 783                                 else
 784                                         tmp_bool = sr_parse_boolstring(value);
 785                                 ret = dev->driver->dev_config_set(dev->driver_index,
 786                                                 sr_hwcap_options[i].hwcap,
 787                                                 GINT_TO_POINTER(tmp_bool));
 788                                 break;
 789                         default:
 790                                 ret = SR_ERR;
 791                         }
 792
 793                         if (ret != SR_OK) {
 794                                 g_critical("Failed to set device option '%s'.", (char *)key);
 795                                 return ret;
 796                         }
 797                         else
 798                                 break;
 799                 }
 800                 if (!found) {
 801                         g_critical("Unknown device option '%s'.", (char *) key);
 802                         return SR_ERR;
 803                 }
 804         }
 805
 806         return SR_OK;
 807 }
 808
 809 static void run_session(void)
 810 {
 811         struct sr_dev *dev;
 812         GHashTable *devargs;
 813         int num_devs, max_probes, i;
 814         uint64_t time_msec;
 815         char **probelist, *devspec;
 816
 817         devargs = NULL;
 818         if (opt_dev) {
 819                 devargs = parse_generic_arg(opt_dev);
 820                 devspec = g_hash_table_lookup(devargs, "sigrok_key");
 821                 dev = parse_devstring(devspec);
 822                 if (!dev) {
 823                         g_critical("Device not found.");
 824                         return;
 825                 }
 826                 g_hash_table_remove(devargs, "sigrok_key");
 827         } else {
 828                 num_devs = num_real_devs();
 829                 if (num_devs == 1) {
 830                         /* No device specified, but there is only one. */
 831                         devargs = NULL;
 832                         dev = parse_devstring("0");
 833                 } else if (num_devs == 0) {
 834                         g_critical("No devices found.");
 835                         return;
 836                 } else {
 837                         g_critical("%d devices found, please select one.", num_devs);
 838                         return;
 839                 }
 840         }
 841
 842         sr_session_new();
 843         sr_session_datafeed_callback_add(datafeed_in);
 844
 845         if (sr_session_dev_add(dev) != SR_OK) {
 846                 g_critical("Failed to use device.");
 847                 sr_session_destroy();
 848                 return;
 849         }
 850
 851         if (devargs) {
 852                 if (set_dev_options(dev, devargs) != SR_OK) {
 853                         sr_session_destroy();
 854                         return;
 855                 }
 856                 g_hash_table_destroy(devargs);
 857         }
 858
 859         if (select_probes(dev) != SR_OK)
 860             return;
 861
 862         if (opt_continuous) {
 863                 if (!sr_driver_hwcap_exists(dev->driver, SR_HWCAP_CONTINUOUS)) {
 864                         g_critical("This device does not support continuous sampling.");
 865                         sr_session_destroy();
 866                         return;
 867                 }
 868         }
 869
 870         if (opt_triggers) {
 871                 probelist = sr_parse_triggerstring(dev, opt_triggers);
 872                 if (!probelist) {
 873                         sr_session_destroy();
 874                         return;
 875                 }
 876
 877                 max_probes = g_slist_length(dev->probes);
 878                 for (i = 0; i < max_probes; i++) {
 879                         if (probelist[i]) {
 880                                 sr_dev_trigger_set(dev, i + 1, probelist[i]);
 881                                 g_free(probelist[i]);
 882                         }
 883                 }
 884                 g_free(probelist);
 885         }
 886
 887         if (opt_time) {
 888                 time_msec = sr_parse_timestring(opt_time);
 889                 if (time_msec == 0) {
 890                         g_critical("Invalid time '%s'", opt_time);
 891                         sr_session_destroy();
 892                         return;
 893                 }
 894
 895                 if (sr_driver_hwcap_exists(dev->driver, SR_HWCAP_LIMIT_MSEC)) {
 896                         if (dev->driver->dev_config_set(dev->driver_index,
 897                             SR_HWCAP_LIMIT_MSEC, &time_msec) != SR_OK) {
 898                                 g_critical("Failed to configure time limit.");
 899                                 sr_session_destroy();
 900                                 return;
 901                         }
 902                 }
 903                 else {
 904                         /* time limit set, but device doesn't support this...
 905                          * convert to samples based on the samplerate.
 906                          */
 907                         limit_samples = 0;
 908                         if (sr_dev_has_hwcap(dev, SR_HWCAP_SAMPLERATE)) {
 909                                 const uint64_t *samplerate;
 910
 911                                 sr_dev_info_get(dev, SR_DI_CUR_SAMPLERATE,
 912                                                 (const void **)&samplerate);
 913                                 limit_samples = (*samplerate) * time_msec / (uint64_t)1000;
 914                         }
 915                         if (limit_samples == 0) {
 916                                 g_critical("Not enough time at this samplerate.");
 917                                 sr_session_destroy();
 918                                 return;
 919                         }
 920
 921                         if (dev->driver->dev_config_set(dev->driver_index,
 922                             SR_HWCAP_LIMIT_SAMPLES, &limit_samples) != SR_OK) {
 923                                 g_critical("Failed to configure time-based sample limit.");
 924                                 sr_session_destroy();
 925                                 return;
 926                         }
 927                 }
 928         }
 929
 930         if (opt_samples) {
 931                 if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)
 932                         || (dev->driver->dev_config_set(dev->driver_index,
 933                             SR_HWCAP_LIMIT_SAMPLES, &limit_samples) != SR_OK)) {
 934                         g_critical("Failed to configure sample limit.");
 935                         sr_session_destroy();
 936                         return;
 937                 }
 938         }
 939
 940         if (dev->driver->dev_config_set(dev->driver_index,
 941                   SR_HWCAP_PROBECONFIG, (char *)dev->probes) != SR_OK) {
 942                 g_critical("Failed to configure probes.");
 943                 sr_session_destroy();
 944                 return;
 945         }
 946
 947         if (sr_session_start() != SR_OK) {
 948                 g_critical("Failed to start session.");
 949                 sr_session_destroy();
 950                 return;
 951         }
 952
 953         if (opt_continuous)
 954                 add_anykey();
 955
 956         sr_session_run();
 957
 958         if (opt_continuous)
 959                 clear_anykey();
 960
 961         if (opt_output_file && default_output_format) {
 962                 if (sr_session_save(opt_output_file) != SR_OK)
 963                         g_critical("Failed to save session.");
 964         }
 965         sr_session_destroy();
 966 }
 967
 968 static void logger(const gchar *log_domain, GLogLevelFlags log_level,
 969                    const gchar *message, gpointer cb_data)
 970 {
 971         /* Avoid compiler warnings. */
 972         (void)log_domain;
 973         (void)cb_data;
 974
 975         /*
 976          * All messages, warnings, errors etc. go to stderr (not stdout) in
 977          * order to not mess up the CLI tool data output, e.g. VCD output.
 978          */
 979         if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_WARNING)
 980                         || opt_loglevel > SR_LOG_WARN) {
 981                 fprintf(stderr, "%s\n", message);
 982                 fflush(stderr);
 983         }
 984 }
 985
 986 int main(int argc, char **argv)
 987 {
 988         GOptionContext *context;
 989         GError *error;
 990         GHashTable *fmtargs;
 991         GHashTableIter iter;
 992         gpointer key, value;
 993         struct sr_output_format **outputs;
 994         struct srd_decoder_inst *di_from, *di_to;
 995         int i, ret;
 996         char *fmtspec, **pds;
 997
 998         g_log_set_default_handler(logger, NULL);
 999
1000         error = NULL;
1001         context = g_option_context_new(NULL);
1002         g_option_context_add_main_entries(context, optargs, NULL);
1003
1004         if (!g_option_context_parse(context, &argc, &argv, &error)) {
1005                 g_critical("%s", error->message);
1006                 return 1;
1007         }
1008
1009         /* Set the loglevel (amount of messages to output) for libsigrok. */
1010         if (sr_log_loglevel_set(opt_loglevel) != SR_OK) {
1011                 g_critical("sr_log_loglevel_set(%d) failed.", opt_loglevel);
1012                 return 1;
1013         }
1014
1015         /* Set the loglevel (amount of messages to output) for libsigrokdecode. */
1016         if (srd_log_loglevel_set(opt_loglevel) != SRD_OK) {
1017                 g_critical("srd_log_loglevel_set(%d) failed.", opt_loglevel);
1018                 return 1;
1019         }
1020
1021         if (sr_init() != SR_OK)
1022                 return 1;
1023
1024         if (opt_pds) {
1025                 if (srd_init(NULL) != SRD_OK) {
1026                         g_critical("Failed to initialize sigrokdecode.");
1027                         return 1;
1028                 }
1029                 if (register_pds(NULL, opt_pds) != 0) {
1030                         g_critical("Failed to register protocol decoders.");
1031                         return 1;
1032                 }
1033                 if (srd_pd_output_callback_add(SRD_OUTPUT_ANN,
1034                                 show_pd_annotation, NULL) != SRD_OK) {
1035                         g_critical("Failed to register protocol decoder callback.");
1036                         return 1;
1037                 }
1038
1039                 pds = g_strsplit(opt_pds, ",", 0);
1040                 if (g_strv_length(pds) > 1) {
1041                         if (opt_pd_stack) {
1042                                 /* A stack setup was specified, use that. */
1043                                 g_strfreev(pds);
1044                                 pds = g_strsplit(opt_pd_stack, ",", 0);
1045                                 if (g_strv_length(pds) < 2) {
1046                                         g_strfreev(pds);
1047                                         g_critical("Specify at least two protocol decoders to stack.");
1048                                         return 1;
1049                                 }
1050                         }
1051
1052                         if (!(di_from = srd_inst_find_by_id(pds[0]))) {
1053                                 g_critical("Cannot stack protocol decoder '%s': "
1054                                                 "instance not found.", pds[0]);
1055                                 return 1;
1056                         }
1057                         for (i = 1; pds[i]; i++) {
1058                                 if (!(di_to = srd_inst_find_by_id(pds[i]))) {
1059                                         g_critical("Cannot stack protocol decoder '%s': "
1060                                                         "instance not found.", pds[i]);
1061                                         return 1;
1062                                 }
1063                                 if ((ret = srd_inst_stack(di_from, di_to)) != SRD_OK)
1064                                         return ret;
1065
1066                                 /* Don't show annotation from this PD. Only the last PD in
1067                                  * the stack will be left on the annotation list.
1068                                  */
1069                                 g_datalist_remove_data(&pd_ann_visible, di_from->inst_id);
1070
1071                                 di_from = di_to;
1072                         }
1073                 }
1074                 g_strfreev(pds);
1075         }
1076
1077         if (!opt_output_format) {
1078                 opt_output_format = DEFAULT_OUTPUT_FORMAT;
1079                 /* we'll need to remember this so when saving to a file
1080                  * later, sigrok session format will be used.
1081                  */
1082                 default_output_format = TRUE;
1083         }
1084         fmtargs = parse_generic_arg(opt_output_format);
1085         fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
1086         if (!fmtspec) {
1087                 g_critical("Invalid output format.");
1088                 return 1;
1089         }
1090         outputs = sr_output_list();
1091         for (i = 0; outputs[i]; i++) {
1092                 if (strcmp(outputs[i]->id, fmtspec))
1093                         continue;
1094                 g_hash_table_remove(fmtargs, "sigrok_key");
1095                 output_format = outputs[i];
1096                 g_hash_table_iter_init(&iter, fmtargs);
1097                 while (g_hash_table_iter_next(&iter, &key, &value)) {
1098                         /* only supporting one parameter per output module
1099                          * for now, and only its value */
1100                         output_format_param = g_strdup(value);
1101                         break;
1102                 }
1103                 break;
1104         }
1105         if (!output_format) {
1106                 g_critical("Invalid output format %s.", opt_output_format);
1107                 return 1;
1108         }
1109
1110         if (opt_version)
1111                 show_version();
1112         else if (opt_list_devs)
1113                 show_dev_list();
1114         else if (opt_input_file)
1115                 load_input_file();
1116         else if (opt_samples || opt_time || opt_continuous)
1117                 run_session();
1118         else if (opt_dev)
1119                 show_dev_detail();
1120         else if (opt_pds)
1121                 show_pd_detail();
1122         else
1123                 printf("%s", g_option_context_get_help(context, TRUE, NULL));
1124
1125         if (opt_pds)
1126                 srd_exit();
1127
1128         g_option_context_free(context);
1129         g_hash_table_destroy(fmtargs);
1130         sr_exit();
1131
1132         return 0;
1133 }