show: do print floating point results even if value is zero
[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                 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 }