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