New --probe-group option

[sigrok-cli.git] / sigrok-cli.c

/*
 * This file is part of the sigrok-cli project.
 *
 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"
#ifdef HAVE_SRD
#include <libsigrokdecode/libsigrokdecode.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <libsigrok/libsigrok.h>
#include "sigrok-cli.h"

#define DEFAULT_OUTPUT_FORMAT "bits:width=64"

static struct sr_context *sr_ctx = NULL;

static uint64_t limit_samples = 0;
static uint64_t limit_frames = 0;
static struct sr_output_format *output_format = NULL;
static int default_output_format = FALSE;
static char *output_format_param = NULL;
#ifdef HAVE_SRD
static struct srd_session *srd_sess = NULL;
static GHashTable *pd_ann_visible = NULL;
#endif
static GByteArray *savebuf;

static gboolean opt_version = FALSE;
static gint opt_loglevel = SR_LOG_WARN; /* Show errors+warnings per default. */
static gboolean opt_scan_devs = FALSE;
static gboolean opt_wait_trigger = FALSE;
static gchar *opt_input_file = NULL;
static gchar *opt_output_file = NULL;
static gchar *opt_drv = NULL;
static gchar *opt_config = NULL;
static gchar *opt_probes = NULL;
static gchar *opt_probe_group = NULL;
static gchar *opt_triggers = NULL;
static gchar *opt_pds = NULL;
#ifdef HAVE_SRD
static gchar *opt_pd_stack = NULL;
static gchar *opt_pd_annotations = NULL;
#endif
static gchar *opt_input_format = NULL;
static gchar *opt_output_format = NULL;
static gchar *opt_show = NULL;
static gchar *opt_time = NULL;
static gchar *opt_samples = NULL;
static gchar *opt_frames = NULL;
static gchar *opt_continuous = NULL;
static gchar *opt_set = NULL;

static GOptionEntry optargs[] = {
	{"version", 'V', 0, G_OPTION_ARG_NONE, &opt_version,
			"Show version and support list", NULL},
	{"loglevel", 'l', 0, G_OPTION_ARG_INT, &opt_loglevel,
			"Set loglevel (5 is most verbose)", NULL},
	{"driver", 'd', 0, G_OPTION_ARG_STRING, &opt_drv,
			"The driver to use", NULL},
	{"config", 'c', 0, G_OPTION_ARG_STRING, &opt_config,
			"Specify device configuration options", NULL},
	{"input-file", 'i', 0, G_OPTION_ARG_FILENAME, &opt_input_file,
			"Load input from file", NULL},
	{"input-format", 'I', 0, G_OPTION_ARG_STRING, &opt_input_format,
			"Input format", NULL},
	{"output-file", 'o', 0, G_OPTION_ARG_FILENAME, &opt_output_file,
			"Save output to file", NULL},
	{"output-format", 'O', 0, G_OPTION_ARG_STRING, &opt_output_format,
			"Output format", NULL},
	{"probes", 'p', 0, G_OPTION_ARG_STRING, &opt_probes,
			"Probes to use", NULL},
	{"probe-group", 'g', 0, G_OPTION_ARG_STRING, &opt_probe_group,
			"Probe groups", NULL},
	{"triggers", 't', 0, G_OPTION_ARG_STRING, &opt_triggers,
			"Trigger configuration", NULL},
	{"wait-trigger", 'w', 0, G_OPTION_ARG_NONE, &opt_wait_trigger,
			"Wait for trigger", NULL},
#ifdef HAVE_SRD
	{"protocol-decoders", 'P', 0, G_OPTION_ARG_STRING, &opt_pds,
			"Protocol decoders to run", NULL},
	{"protocol-decoder-stack", 'S', 0, G_OPTION_ARG_STRING, &opt_pd_stack,
			"Protocol decoder stack", NULL},
	{"protocol-decoder-annotations", 'A', 0, G_OPTION_ARG_STRING, &opt_pd_annotations,
			"Protocol decoder annotation(s) to show", NULL},
#endif
	{"scan", 0, 0, G_OPTION_ARG_NONE, &opt_scan_devs,
			"Scan for devices", NULL},
	{"show", 0, 0, G_OPTION_ARG_NONE, &opt_show,
			"Show device detail", NULL},
	{"time", 0, 0, G_OPTION_ARG_STRING, &opt_time,
			"How long to sample (ms)", NULL},
	{"samples", 0, 0, G_OPTION_ARG_STRING, &opt_samples,
			"Number of samples to acquire", NULL},
	{"frames", 0, 0, G_OPTION_ARG_STRING, &opt_frames,
			"Number of frames to acquire", NULL},
	{"continuous", 0, 0, G_OPTION_ARG_NONE, &opt_continuous,
			"Sample continuously", NULL},
	{"set", 0, 0, G_OPTION_ARG_NONE, &opt_set, "Set device options only", NULL},
	{NULL, 0, 0, 0, NULL, NULL, NULL}
};


/* Convert driver options hash to GSList of struct sr_config. */
static GSList *hash_to_hwopt(GHashTable *hash)
{
	const struct sr_config_info *srci;
	struct sr_config *src;
	GList *gl, *keys;
	GSList *opts;
	char *key, *value;

	keys = g_hash_table_get_keys(hash);
	opts = NULL;
	for (gl = keys; gl; gl = gl->next) {
		key = gl->data;
		if (!(srci = sr_config_info_name_get(key))) {
			g_critical("Unknown option %s", key);
			return NULL;
		}
		src = g_try_malloc(sizeof(struct sr_config));
		src->key = srci->key;
		value = g_hash_table_lookup(hash, key);
		src->data = g_variant_new_string(value);
		opts = g_slist_append(opts, src);
	}
	g_list_free(keys);

	return opts;
}

static void free_drvopts(struct sr_config *src)
{
	g_variant_unref(src->data);
	g_free(src);
}

static GSList *device_scan(void)
{
	struct sr_dev_driver **drivers, *driver;
	GHashTable *drvargs;
	GSList *drvopts, *devices, *tmpdevs, *l;
	int i;
	char *drvname;

	if (opt_drv) {
		drvargs = parse_generic_arg(opt_drv, TRUE);
		drvname = g_strdup(g_hash_table_lookup(drvargs, "sigrok_key"));
		g_hash_table_remove(drvargs, "sigrok_key");
		driver = NULL;
		drivers = sr_driver_list();
		for (i = 0; drivers[i]; i++) {
			if (strcmp(drivers[i]->name, drvname))
				continue;
			driver = drivers[i];
		}
		if (!driver) {
			g_critical("Driver %s not found.", drvname);
			g_hash_table_destroy(drvargs);
			g_free(drvname);
			return NULL;
		}
		g_free(drvname);
		if (sr_driver_init(sr_ctx, driver) != SR_OK) {
			g_critical("Failed to initialize driver.");
			g_hash_table_destroy(drvargs);
			return NULL;
		}
		drvopts = NULL;
		if (g_hash_table_size(drvargs) > 0) {
			if (!(drvopts = hash_to_hwopt(drvargs))) {
				/* Unknown options, already logged. */
				g_hash_table_destroy(drvargs);
				return NULL;
			}
		}
		g_hash_table_destroy(drvargs);
		devices = sr_driver_scan(driver, drvopts);
		g_slist_free_full(drvopts, (GDestroyNotify)free_drvopts);
	} else {
		/* No driver specified, let them all scan on their own. */
		devices = NULL;
		drivers = sr_driver_list();
		for (i = 0; drivers[i]; i++) {
			driver = drivers[i];
			if (sr_driver_init(sr_ctx, driver) != SR_OK) {
				g_critical("Failed to initialize driver.");
				return NULL;
			}
			tmpdevs = sr_driver_scan(driver, NULL);
			for (l = tmpdevs; l; l = l->next)
				devices = g_slist_append(devices, l->data);
			g_slist_free(tmpdevs);
		}
	}

	return devices;
}

static void show_version(void)
{
	struct sr_dev_driver **drivers;
	struct sr_input_format **inputs;
	struct sr_output_format **outputs;
	int i;
#ifdef HAVE_SRD
	struct srd_decoder *dec;
	const GSList *l;
#endif

	printf("sigrok-cli %s\n\n", VERSION);

	printf("Using libsigrok %s (lib version %s).\n",
	       sr_package_version_string_get(), sr_lib_version_string_get());
#ifdef HAVE_SRD
	printf("Using libsigrokdecode %s (lib version %s).\n\n",
	       srd_package_version_string_get(), srd_lib_version_string_get());
#endif

	printf("Supported hardware drivers:\n");
	drivers = sr_driver_list();
	for (i = 0; drivers[i]; i++) {
		printf("  %-20s %s\n", drivers[i]->name, drivers[i]->longname);
	}
	printf("\n");

	printf("Supported input formats:\n");
	inputs = sr_input_list();
	for (i = 0; inputs[i]; i++)
		printf("  %-20s %s\n", inputs[i]->id, inputs[i]->description);
	printf("\n");

	printf("Supported output formats:\n");
	outputs = sr_output_list();
	for (i = 0; outputs[i]; i++)
		printf("  %-20s %s\n", outputs[i]->id, outputs[i]->description);
	printf("  %-20s %s\n", "sigrok", "Default file output format");
	printf("\n");

#ifdef HAVE_SRD
	if (srd_init(NULL) == SRD_OK) {
		printf("Supported protocol decoders:\n");
		srd_decoder_load_all();
		for (l = srd_decoder_list(); l; l = l->next) {
			dec = l->data;
			printf("  %-20s %s\n", dec->id, dec->longname);
			/* Print protocol description upon "-l 3" or higher. */
			if (opt_loglevel >= SR_LOG_INFO)
				printf("  %-20s %s\n", "", dec->desc);
		}
		srd_exit();
	}
	printf("\n");
#endif
}

static void print_dev_line(const struct sr_dev_inst *sdi)
{
	struct sr_probe *probe;
	GSList *l;
	GString *s;
	GVariant *gvar;

	s = g_string_sized_new(128);
	g_string_assign(s, sdi->driver->name);
	if (sr_config_get(sdi->driver, sdi, NULL, SR_CONF_CONN, &gvar) == SR_OK) {
		g_string_append(s, ":conn=");
		g_string_append(s, g_variant_get_string(gvar, NULL));
		g_variant_unref(gvar);
	}
	g_string_append(s, " - ");
	if (sdi->vendor && sdi->vendor[0])
		g_string_append_printf(s, "%s ", sdi->vendor);
	if (sdi->model && sdi->model[0])
		g_string_append_printf(s, "%s ", sdi->model);
	if (sdi->version && sdi->version[0])
		g_string_append_printf(s, "%s ", sdi->version);
	if (sdi->probes) {
		if (g_slist_length(sdi->probes) == 1) {
			probe = sdi->probes->data;
			g_string_append_printf(s, "with 1 probe: %s", probe->name);
		} else {
			g_string_append_printf(s, "with %d probes:", g_slist_length(sdi->probes));
			for (l = sdi->probes; l; l = l->next) {
				probe = l->data;
				g_string_append_printf(s, " %s", probe->name);
			}
		}
	}
	g_string_append_printf(s, "\n");
	printf("%s", s->str);
	g_string_free(s, TRUE);

}

static void show_dev_list(void)
{
	struct sr_dev_inst *sdi;
	GSList *devices, *l;

	if (!(devices = device_scan()))
		return;

	printf("The following devices were found:\n");
	for (l = devices; l; l = l->next) {
		sdi = l->data;
		print_dev_line(sdi);
	}
	g_slist_free(devices);

}

static void show_dev_detail(void)
{
	struct sr_dev_inst *sdi;
	const struct sr_config_info *srci;
	struct sr_probe *probe;
	struct sr_probe_group *probe_group;
	GSList *devices, *pgl, *prl;
	GVariant *gvar_opts, *gvar_dict, *gvar_list, *gvar;
	gsize num_opts, num_elements;
	const uint64_t *uint64, p, q, low, high;
	uint64_t cur_low, cur_high;
	const int32_t *opts;
	unsigned int num_devices, o, i;
	char *tmp_str;
	char *s;
	const char *charopts, **stropts;

	if (!(devices = device_scan())) {
		g_critical("No devices found.");
		return;
	}

	num_devices = g_slist_length(devices);
	if (num_devices > 1) {
		g_critical("%d devices found. Use --scan to show them, "
				"and select one to show.", num_devices);
		return;
	}

	sdi = devices->data;
	print_dev_line(sdi);

	if (sr_dev_open(sdi) != SR_OK) {
		g_critical("Failed to open device.");
		return;
	}

	if ((sr_config_list(sdi->driver, NULL, NULL, SR_CONF_SCAN_OPTIONS,
			&gvar_opts) == SR_OK)) {
		opts = g_variant_get_fixed_array(gvar_opts, &num_elements,
				sizeof(int32_t));
		printf("Supported driver options:\n");
		for (i = 0; i < num_elements; i++) {
			if (!(srci = sr_config_info_get(opts[i])))
				continue;
			printf("    %s\n", srci->id);
		}
		g_variant_unref(gvar_opts);
	}

	if ((sr_config_list(sdi->driver, sdi, NULL, SR_CONF_DEVICE_OPTIONS,
			&gvar_opts) != SR_OK))
		/* Driver supports no device instance options. */
		return;

	if (sdi->probe_groups) {
		printf("Probe groups:\n");
		for (pgl = sdi->probe_groups; pgl; pgl = pgl->next) {
			probe_group = pgl->data;
			printf("    %s:", probe_group->name);
			for (prl = probe_group->probes; prl; prl = prl->next) {
				probe = prl->data;
				printf(" %s", probe->name);
			}
			printf("\n");
		}
	}

	printf("Supported configuration options:\n");
	opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(int32_t));
	for (o = 0; o < num_opts; o++) {
		if (!(srci = sr_config_info_get(opts[o])))
			continue;

		if (srci->key == SR_CONF_TRIGGER_TYPE) {
			if (sr_config_list(sdi->driver, sdi, NULL, srci->key,
					&gvar) != SR_OK) {
				printf("\n");
				continue;
			}
			charopts = g_variant_get_string(gvar, NULL);
			printf("    Supported triggers: ");
			while (*charopts) {
				printf("%c ", *charopts);
				charopts++;
			}
			printf("\n");
			g_variant_unref(gvar);

		} else if (srci->key == SR_CONF_PATTERN_MODE) {
			/* Pattern generator modes */
			printf("    %s", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL, srci->key,
					&gvar) == SR_OK) {
				printf(" - supported patterns:\n");
				stropts = g_variant_get_strv(gvar, &num_elements);
				for (i = 0; i < num_elements; i++)
					printf("      %s\n", stropts[i]);
				g_variant_unref(gvar);
			} else {
				printf("\n");
			}

		} else if (srci->key == SR_CONF_SAMPLERATE) {
			/* Supported samplerates */
			printf("    %s", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL, SR_CONF_SAMPLERATE,
					&gvar_dict) != SR_OK) {
				printf("\n");
				continue;
			}
			if ((gvar_list = g_variant_lookup_value(gvar_dict,
					"samplerates", G_VARIANT_TYPE("at")))) {
				uint64 = g_variant_get_fixed_array(gvar_list,
						&num_elements, sizeof(uint64_t));
				printf(" - supported samplerates:\n");
				for (i = 0; i < num_elements; i++) {
					if (!(s = sr_samplerate_string(uint64[i])))
						continue;
					printf("      %s\n", s);
					g_free(s);
				}
				g_variant_unref(gvar_list);
			} else if ((gvar_list = g_variant_lookup_value(gvar_dict,
					"samplerate-steps", G_VARIANT_TYPE("at")))) {
				uint64 = g_variant_get_fixed_array(gvar_list,
						&num_elements, sizeof(uint64_t));
				/* low */
				if (!(s = sr_samplerate_string(uint64[0])))
					continue;
				printf(" (%s", s);
				g_free(s);
				/* high */
				if (!(s = sr_samplerate_string(uint64[1])))
					continue;
				printf(" - %s", s);
				g_free(s);
				/* step */
				if (!(s = sr_samplerate_string(uint64[2])))
					continue;
				printf(" in steps of %s)\n", s);
				g_free(s);
				g_variant_unref(gvar_list);
			}
			g_variant_unref(gvar_dict);

		} else if (srci->key == SR_CONF_BUFFERSIZE) {
			/* Supported buffer sizes */
			printf("    %s", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL,
					SR_CONF_BUFFERSIZE, &gvar_list) != SR_OK) {
				printf("\n");
				continue;
			}
			uint64 = g_variant_get_fixed_array(gvar_list,
					&num_elements, sizeof(uint64_t));
			printf(" - supported buffer sizes:\n");
			for (i = 0; i < num_elements; i++)
				printf("      %"PRIu64"\n", uint64[i]);
			g_variant_unref(gvar_list);

		} else if (srci->key == SR_CONF_TIMEBASE) {
			/* Supported time bases */
			printf("    %s", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL,
					SR_CONF_TIMEBASE, &gvar_list) != SR_OK) {
				printf("\n");
				continue;
			}
			printf(" - supported time bases:\n");
			num_elements = g_variant_n_children(gvar_list);
			for (i = 0; i < num_elements; i++) {
				gvar = g_variant_get_child_value(gvar_list, i);
				g_variant_get(gvar, "(tt)", &p, &q);
				s = sr_period_string(p * q);
				printf("      %s\n", s);
				g_free(s);
			}
			g_variant_unref(gvar_list);

		} else if (srci->key == SR_CONF_VDIV) {
			/* Supported volts/div values */
			printf("    %s", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL,
					SR_CONF_VDIV, &gvar_list) != SR_OK) {
				printf("\n");
				continue;
			}
			printf(" - supported volts/div:\n");
			num_elements = g_variant_n_children(gvar_list);
			for (i = 0; i < num_elements; i++) {
				gvar = g_variant_get_child_value(gvar_list, i);
				g_variant_get(gvar, "(tt)", &p, &q);
				s = sr_voltage_string(p, q);
				printf("      %s\n", s);
				g_free(s);
			}
			g_variant_unref(gvar_list);

		} else if (srci->datatype == SR_T_CHAR) {
			printf("    %s: ", srci->id);
			if (sr_config_get(sdi->driver, sdi, NULL, srci->key,
					&gvar) == SR_OK) {
				tmp_str = g_strdup(g_variant_get_string(gvar, NULL));
				g_variant_unref(gvar);
			} else
				tmp_str = NULL;

			if (sr_config_list(sdi->driver, sdi, NULL, srci->key,
					&gvar) != SR_OK) {
				printf("\n");
				continue;
			}

			stropts = g_variant_get_strv(gvar, &num_elements);
			for (i = 0; i < num_elements; i++) {
				if (i)
					printf(", ");
				printf("%s", stropts[i]);
				if (tmp_str && !strcmp(tmp_str, stropts[i]))
					printf(" (current)");
			}
			printf("\n");
			g_free(stropts);
			g_free(tmp_str);
			g_variant_unref(gvar);

		} else if (srci->datatype == SR_T_UINT64_RANGE) {
			printf("    %s: ", srci->id);
			if (sr_config_list(sdi->driver, sdi, NULL, srci->key,
					&gvar_list) != SR_OK) {
				printf("\n");
				continue;
			}

			if (sr_config_get(sdi->driver, sdi, NULL, srci->key, &gvar) == SR_OK) {
				g_variant_get(gvar, "(tt)", &cur_low, &cur_high);
				g_variant_unref(gvar);
			} else {
				cur_low = 0;
				cur_high = 0;
			}

			num_elements = g_variant_n_children(gvar_list);
			for (i = 0; i < num_elements; i++) {
				gvar = g_variant_get_child_value(gvar_list, i);
				g_variant_get(gvar, "(tt)", &low, &high);
				g_variant_unref(gvar);
				if (i)
					printf(", ");
				printf("%"PRIu64"-%"PRIu64, low, high);
				if (low == cur_low && high == cur_high)
					printf(" (current)");
			}
			printf("\n");
			g_variant_unref(gvar_list);

		} else if (srci->datatype == SR_T_BOOL) {
			printf("    %s: ", srci->id);
			if (sr_config_get(sdi->driver, sdi, NULL, srci->key,
					&gvar) == SR_OK) {
				if (g_variant_get_boolean(gvar))
					printf("on (current), off\n");
				else
					printf("on, off (current)\n");
				g_variant_unref(gvar);
			} else
				printf("on, off\n");

		} else {

			/* Everything else */
			printf("    %s\n", srci->id);
		}
	}
	g_variant_unref(gvar_opts);

	sr_dev_close(sdi);
	g_slist_free(devices);

}

#ifdef HAVE_SRD
static void show_pd_detail(void)
{
	GSList *l;
	struct srd_decoder *dec;
	struct srd_decoder_option *o;
	char **pdtokens, **pdtok, *optsep, **ann, *val, *doc;
	struct srd_probe *p;

	pdtokens = g_strsplit(opt_pds, ",", -1);
	for (pdtok = pdtokens; *pdtok; pdtok++) {
		/* Strip options. */
		if ((optsep = strchr(*pdtok, ':')))
			*optsep = '\0';
		if (!(dec = srd_decoder_get_by_id(*pdtok))) {
			g_critical("Protocol decoder %s not found.", *pdtok);
			return;
		}
		printf("ID: %s\nName: %s\nLong name: %s\nDescription: %s\n",
				dec->id, dec->name, dec->longname, dec->desc);
		printf("License: %s\n", dec->license);
		printf("Annotations:\n");
		if (dec->annotations) {
			for (l = dec->annotations; l; l = l->next) {
				ann = l->data;
				printf("- %s\n  %s\n", ann[0], ann[1]);
			}
		} else {
			printf("None.\n");
		}
		printf("Required probes:\n");
		if (dec->probes) {
			for (l = dec->probes; l; l = l->next) {
				p = l->data;
				printf("- %s (%s): %s\n",
				       p->name, p->id, p->desc);
			}
		} else {
			printf("None.\n");
		}
		printf("Optional probes:\n");
		if (dec->opt_probes) {
			for (l = dec->opt_probes; l; l = l->next) {
				p = l->data;
				printf("- %s (%s): %s\n",
				       p->name, p->id, p->desc);
			}
		} else {
			printf("None.\n");
		}
		if (dec->options) {
			printf("Options:\n");
			for (l = dec->options; l; l = l->next) {
				o = l->data;
				val = g_variant_print(o->def, FALSE);
				printf("- %s: %s (default %s)\n", o->id, o->desc, val);
				g_free(val);
			}
		}
		if ((doc = srd_decoder_doc_get(dec))) {
			printf("Documentation:\n%s\n",
			       doc[0] == '\n' ? doc + 1 : doc);
			g_free(doc);
		}
	}

	g_strfreev(pdtokens);
}
#endif

static GArray *get_enabled_logic_probes(const struct sr_dev_inst *sdi)
{
	struct sr_probe *probe;
	GArray *probes;
	GSList *l;

	probes = g_array_new(FALSE, FALSE, sizeof(int));
	for (l = sdi->probes; l; l = l->next) {
		probe = l->data;
		if (probe->type != SR_PROBE_LOGIC)
			continue;
		if (probe->enabled != TRUE)
			continue;
		g_array_append_val(probes, probe->index);
	}

	return probes;
}

static void datafeed_in(const struct sr_dev_inst *sdi,
		const struct sr_datafeed_packet *packet, void *cb_data)
{
	const struct sr_datafeed_meta *meta;
	const struct sr_datafeed_logic *logic;
	const struct sr_datafeed_analog *analog;
	struct sr_config *src;
	static struct sr_output *o = NULL;
	static GArray *logic_probelist = NULL;
	static uint64_t received_samples = 0;
	static int unitsize = 0;
	static int triggered = 0;
	static FILE *outfile = NULL;
	GSList *l;
	GString *out;
	int sample_size, ret;
	uint64_t samplerate, output_len, filter_out_len, end_sample;
	uint8_t *output_buf, *filter_out;

	(void) cb_data;

	/* If the first packet to come in isn't a header, don't even try. */
	if (packet->type != SR_DF_HEADER && o == NULL)
		return;

	sample_size = -1;
	switch (packet->type) {
	case SR_DF_HEADER:
		g_debug("cli: Received SR_DF_HEADER");
		/* Initialize the output module. */
		if (!(o = g_try_malloc(sizeof(struct sr_output)))) {
			g_critical("Output module malloc failed.");
			exit(1);
		}
		o->format = output_format;
		o->sdi = (struct sr_dev_inst *)sdi;
		o->param = output_format_param;
		if (o->format->init) {
			if (o->format->init(o) != SR_OK) {
				g_critical("Output format initialization failed.");
				exit(1);
			}
		}

		/* Prepare non-stdout output. */
		outfile = stdout;
		if (opt_output_file) {
			if (default_output_format) {
				/* output file is in session format, so we'll
				 * keep a copy of everything as it comes in
				 * and save from there after the session. */
				outfile = NULL;
				savebuf = g_byte_array_new();
			} else {
				/* saving to a file in whatever format was set
				 * with --format, so all we need is a filehandle */
				outfile = g_fopen(opt_output_file, "wb");
			}
		}

		/* Prepare for logic data. */
		logic_probelist = get_enabled_logic_probes(sdi);
		/* How many bytes we need to store the packed samples. */
		unitsize = (logic_probelist->len + 7) / 8;

#ifdef HAVE_SRD
		GVariant *gvar;
		if (opt_pds && logic_probelist->len) {
			if (sr_config_get(sdi->driver, sdi, NULL, SR_CONF_SAMPLERATE,
					&gvar) == SR_OK) {
				samplerate = g_variant_get_uint64(gvar);
				g_variant_unref(gvar);
				if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
						g_variant_new_uint64(samplerate)) != SRD_OK) {
					g_critical("Failed to configure decode session.");
					break;
				}
			}
			if (srd_session_start(srd_sess) != SRD_OK) {
				g_critical("Failed to start decode session.");
				break;
			}
		}
#endif
		break;

	case SR_DF_META:
		g_debug("cli: received SR_DF_META");
		meta = packet->payload;
		for (l = meta->config; l; l = l->next) {
			src = l->data;
			switch (src->key) {
			case SR_CONF_SAMPLERATE:
				samplerate = g_variant_get_uint64(src->data);
				g_debug("cli: got samplerate %"PRIu64" Hz", samplerate);
#ifdef HAVE_SRD
				if (opt_pds) {
					if (srd_session_metadata_set(srd_sess, SRD_CONF_SAMPLERATE,
							g_variant_new_uint64(samplerate)) != SRD_OK) {
						g_critical("Failed to pass samplerate to decoder.");
					}
				}
#endif
				break;
			case SR_CONF_SAMPLE_INTERVAL:
				samplerate = g_variant_get_uint64(src->data);
				g_debug("cli: got sample interval %"PRIu64" ms", samplerate);
				break;
			default:
				/* Unknown metadata is not an error. */
				break;
			}
		}
		break;

	case SR_DF_TRIGGER:
		g_debug("cli: received SR_DF_TRIGGER");
		if (o->format->event)
			o->format->event(o, SR_DF_TRIGGER, &output_buf,
					 &output_len);
		triggered = 1;
		break;

	case SR_DF_LOGIC:
		logic = packet->payload;
		g_message("cli: received SR_DF_LOGIC, %"PRIu64" bytes", logic->length);
		sample_size = logic->unitsize;
		if (logic->length == 0)
			break;

		/* Don't store any samples until triggered. */
		if (opt_wait_trigger && !triggered)
			break;

		if (limit_samples && received_samples >= limit_samples)
			break;

		ret = sr_filter_probes(sample_size, unitsize, logic_probelist,
				logic->data, logic->length,
				&filter_out, &filter_out_len);
		if (ret != SR_OK)
			break;

		/*
		 * What comes out of the filter is guaranteed to be packed into the
		 * minimum size needed to support the number of samples at this sample
		 * size. however, the driver may have submitted too much. Cut off
		 * the buffer of the last packet according to the sample limit.
		 */
		if (limit_samples && (received_samples + logic->length / sample_size >
				limit_samples * sample_size))
			filter_out_len = limit_samples * sample_size - received_samples;

		if (opt_output_file && default_output_format) {
			/* Saving to a session file. */
			g_byte_array_append(savebuf, filter_out, filter_out_len);
		} else {
			if (opt_pds) {
#ifdef HAVE_SRD
				end_sample = received_samples + filter_out_len / unitsize;
				if (srd_session_send(srd_sess, received_samples, end_sample,
						(uint8_t*)filter_out, filter_out_len) != SRD_OK)
					sr_session_stop();
#endif
			} else {
				output_len = 0;
				if (o->format->data && packet->type == o->format->df_type)
					o->format->data(o, filter_out, filter_out_len,
							&output_buf, &output_len);
				if (output_len) {
					fwrite(output_buf, 1, output_len, outfile);
					fflush(outfile);
					g_free(output_buf);
				}
			}
		}
		g_free(filter_out);

		received_samples += logic->length / sample_size;
		break;

	case SR_DF_ANALOG:
		analog = packet->payload;
		g_message("cli: received SR_DF_ANALOG, %d samples", analog->num_samples);
		if (analog->num_samples == 0)
			break;

		if (limit_samples && received_samples >= limit_samples)
			break;

		if (o->format->data && packet->type == o->format->df_type) {
			o->format->data(o, (const uint8_t *)analog->data,
					analog->num_samples * sizeof(float),
					&output_buf, &output_len);
			if (output_buf) {
				fwrite(output_buf, 1, output_len, outfile);
				fflush(outfile);
				g_free(output_buf);
			}
		}

		received_samples += analog->num_samples;
		break;

	case SR_DF_FRAME_BEGIN:
		g_debug("cli: received SR_DF_FRAME_BEGIN");
		if (o->format->event) {
			o->format->event(o, SR_DF_FRAME_BEGIN, &output_buf,
					 &output_len);
			if (output_buf) {
				fwrite(output_buf, 1, output_len, outfile);
				fflush(outfile);
				g_free(output_buf);
			}
		}
		break;

	case SR_DF_FRAME_END:
		g_debug("cli: received SR_DF_FRAME_END");
		if (o->format->event) {
			o->format->event(o, SR_DF_FRAME_END, &output_buf,
					 &output_len);
			if (output_buf) {
				fwrite(output_buf, 1, output_len, outfile);
				fflush(outfile);
				g_free(output_buf);
			}
		}
		break;

	default:
		break;
	}

	if (o && o->format->receive) {
		if (o->format->receive(o, sdi, packet, &out) == SR_OK && out) {
			fwrite(out->str, 1, out->len, outfile);
			fflush(outfile);
			g_string_free(out, TRUE);
		}
	}

	/* SR_DF_END needs to be handled after the output module's receive()
	 * is called, so it can properly clean up that module etc. */
	if (packet->type == SR_DF_END) {
		g_debug("cli: Received SR_DF_END");

		if (o->format->event) {
			o->format->event(o, SR_DF_END, &output_buf, &output_len);
			if (output_buf) {
				if (outfile)
					fwrite(output_buf, 1, output_len, outfile);
				g_free(output_buf);
				output_len = 0;
			}
		}

		if (limit_samples && received_samples < limit_samples)
			g_warning("Device only sent %" PRIu64 " samples.",
			       received_samples);

		if (opt_continuous)
			g_warning("Device stopped after %" PRIu64 " samples.",
			       received_samples);

		g_array_free(logic_probelist, TRUE);

		if (o->format->cleanup)
			o->format->cleanup(o);
		g_free(o);
		o = NULL;

		if (outfile && outfile != stdout)
			fclose(outfile);

		if (opt_output_file && default_output_format && savebuf->len) {
			if (sr_session_save(opt_output_file, sdi, savebuf->data,
					unitsize, savebuf->len / unitsize) != SR_OK)
				g_critical("Failed to save session.");
			g_byte_array_free(savebuf, FALSE);
		}
	}

}

#ifdef HAVE_SRD
static int opts_to_gvar(struct srd_decoder *dec, GHashTable *hash,
		GHashTable **options)
{
	struct srd_decoder_option *o;
	GSList *optl;
	GVariant *gvar;
	gint64 val_int;
	int ret;
	char *val_str, *conv;

	ret = TRUE;
	*options = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
			(GDestroyNotify)g_variant_unref);

	for (optl = dec->options; optl; optl = optl->next) {
		o = optl->data;
		if (!(val_str = g_hash_table_lookup(hash, o->id)))
			/* Not specified. */
			continue;
		if (g_variant_is_of_type(o->def, G_VARIANT_TYPE_STRING)) {
			gvar = g_variant_new_string(val_str);
		} else if (g_variant_is_of_type(o->def, G_VARIANT_TYPE_INT64)) {
			val_int = strtoll(val_str, &conv, 0);
			if (!conv || conv == val_str) {
				g_critical("Protocol decoder '%s' option '%s' "
						"requires a number.", dec->name, o->id);
				ret = FALSE;
				break;
			}
			gvar = g_variant_new_int64(val_int);
		} else {
			g_critical("Unsupported type for option '%s' (%s)",
					o->id, g_variant_get_type_string(o->def));
			ret = FALSE;
			break;
		}
		g_variant_ref_sink(gvar);
		g_hash_table_insert(*options, g_strdup(o->id), gvar);
		g_hash_table_remove(hash, o->id);
	}

	return ret;
}

static int probes_to_gvar(struct srd_decoder *dec, GHashTable *hash,
		GHashTable **probes)
{
	struct srd_probe *p;
	GSList *all_probes, *l;
	GVariant *gvar;
	gint32 val_int;
	int ret;
	char *val_str, *conv;

	ret = TRUE;
	*probes = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
			(GDestroyNotify)g_variant_unref);

	all_probes = g_slist_copy(dec->probes);
	all_probes = g_slist_concat(all_probes, g_slist_copy(dec->opt_probes));
	for (l = all_probes; l; l = l->next) {
		p = l->data;
		if (!(val_str = g_hash_table_lookup(hash, p->id)))
			/* Not specified. */
			continue;
		val_int = strtoll(val_str, &conv, 10);
		if (!conv || conv == val_str) {
			g_critical("Protocol decoder '%s' probes '%s' "
					"is not a number.", dec->name, p->id);
			ret = FALSE;
			break;
		}
		gvar = g_variant_new_int32(val_int);
		g_variant_ref_sink(gvar);
		g_hash_table_insert(*probes, g_strdup(p->id), gvar);
		g_hash_table_remove(hash, p->id);
	}
	g_slist_free(all_probes);

	return ret;
}

/* Register the given PDs for this session.
 * Accepts a string of the form: "spi:sck=3:sdata=4,spi:sck=3:sdata=5"
 * That will instantiate two SPI decoders on the clock but different data
 * lines.
 */
static int register_pds(struct sr_dev *dev, const char *pdstring)
{
	struct srd_decoder *dec;
	GHashTable *pd_opthash, *options, *probes;
	GList *leftover, *l;
	struct srd_decoder_inst *di;
	int ret;
	char **pdtokens, **pdtok, *pd_name;

	(void)dev;

	ret = 0;
	pd_ann_visible = g_hash_table_new_full(g_str_hash, g_int_equal,
			g_free, NULL);
	pd_name = NULL;
	pd_opthash = options = probes = NULL;
	pdtokens = g_strsplit(pdstring, ",", 0);
	for (pdtok = pdtokens; *pdtok; pdtok++) {
		if (!(pd_opthash = parse_generic_arg(*pdtok, TRUE))) {
			g_critical("Invalid protocol decoder option '%s'.", *pdtok);
			break;
		}

		pd_name = g_strdup(g_hash_table_lookup(pd_opthash, "sigrok_key"));
		g_hash_table_remove(pd_opthash, "sigrok_key");
		if (srd_decoder_load(pd_name) != SRD_OK) {
			g_critical("Failed to load protocol decoder %s.", pd_name);
			ret = 1;
			break;
		}
		dec = srd_decoder_get_by_id(pd_name);

		/* Convert decoder option and probe values to GVariant. */
		if (!opts_to_gvar(dec, pd_opthash, &options)) {
			ret = 1;
			break;
		}
		if (!probes_to_gvar(dec, pd_opthash, &probes)) {
			ret = 1;
			break;
		}
		if (g_hash_table_size(pd_opthash) > 0) {
			leftover = g_hash_table_get_keys(pd_opthash);
			for (l = leftover; l; l = l->next)
				g_critical("Unknown option or probe '%s'", (char *)l->data);
			g_list_free(leftover);
			break;
		}

		if (!(di = srd_inst_new(srd_sess, pd_name, options))) {
			g_critical("Failed to instantiate protocol decoder %s.", pd_name);
			ret = 1;
			break;
		}

		/* If no annotation list was specified, add them all in now.
		 * This will be pared down later to leave only the last PD
		 * in the stack.
		 */
		if (!opt_pd_annotations)
			g_hash_table_insert(pd_ann_visible,
					    g_strdup(di->inst_id), NULL);

		/* Remap the probes if needed. */
		if (srd_inst_probe_set_all(di, probes) != SRD_OK) {
			ret = 1;
			break;
		}
	}

	g_strfreev(pdtokens);
	if (pd_opthash)
		g_hash_table_destroy(pd_opthash);
	if (options)
		g_hash_table_destroy(options);
	if (probes)
		g_hash_table_destroy(probes);
	if (pd_name)
		g_free(pd_name);

	return ret;
}

int setup_pd_stack(void)
{
	struct srd_decoder_inst *di_from, *di_to;
	int ret, i;
	char **pds, **ids;

	/* Set up the protocol decoder stack. */
	pds = g_strsplit(opt_pds, ",", 0);
	if (g_strv_length(pds) > 1) {
		if (opt_pd_stack) {
			/* A stack setup was specified, use that. */
			g_strfreev(pds);
			pds = g_strsplit(opt_pd_stack, ",", 0);
			if (g_strv_length(pds) < 2) {
				g_strfreev(pds);
				g_critical("Specify at least two protocol decoders to stack.");
				return 1;
			}
		}

		/* First PD goes at the bottom of the stack. */
		ids = g_strsplit(pds[0], ":", 0);
		if (!(di_from = srd_inst_find_by_id(srd_sess, ids[0]))) {
			g_strfreev(ids);
			g_critical("Cannot stack protocol decoder '%s': "
					"instance not found.", pds[0]);
			return 1;
		}
		g_strfreev(ids);

		/* Every subsequent PD goes on top. */
		for (i = 1; pds[i]; i++) {
			ids = g_strsplit(pds[i], ":", 0);
			if (!(di_to = srd_inst_find_by_id(srd_sess, ids[0]))) {
				g_strfreev(ids);
				g_critical("Cannot stack protocol decoder '%s': "
						"instance not found.", pds[i]);
				return 1;
			}
			g_strfreev(ids);
			if ((ret = srd_inst_stack(srd_sess, di_from, di_to)) != SRD_OK)
				return 1;

			/* Don't show annotation from this PD. Only the last PD in
			 * the stack will be left on the annotation list (unless
			 * the annotation list was specifically provided).
			 */
			if (!opt_pd_annotations)
				g_hash_table_remove(pd_ann_visible,
						    di_from->inst_id);

			di_from = di_to;
		}
	}
	g_strfreev(pds);

	return 0;
}

int setup_pd_annotations(void)
{
	GSList *l;
	struct srd_decoder *dec;
	int ann;
	char **pds, **pdtok, **keyval, **ann_descr;

	/* Set up custom list of PDs and annotations to show. */
	if (opt_pd_annotations) {
		pds = g_strsplit(opt_pd_annotations, ",", 0);
		for (pdtok = pds; *pdtok && **pdtok; pdtok++) {
			ann = 0;
			keyval = g_strsplit(*pdtok, "=", 0);
			if (!(dec = srd_decoder_get_by_id(keyval[0]))) {
				g_critical("Protocol decoder '%s' not found.", keyval[0]);
				return 1;
			}
			if (!dec->annotations) {
				g_critical("Protocol decoder '%s' has no annotations.", keyval[0]);
				return 1;
			}
			if (g_strv_length(keyval) == 2) {
				for (l = dec->annotations; l; l = l->next, ann++) {
					ann_descr = l->data;
					if (!canon_cmp(ann_descr[0], keyval[1]))
						/* Found it. */
						break;
				}
				if (!l) {
					g_critical("Annotation '%s' not found "
							"for protocol decoder '%s'.", keyval[1], keyval[0]);
					return 1;
				}
			}
			g_debug("cli: showing protocol decoder annotation %d from '%s'", ann, keyval[0]);
			g_hash_table_insert(pd_ann_visible, g_strdup(keyval[0]), GINT_TO_POINTER(ann));
			g_strfreev(keyval);
		}
		g_strfreev(pds);
	}

	return 0;
}

void show_pd_annotations(struct srd_proto_data *pdata, void *cb_data)
{
	int i;
	char **annotations;
	gpointer ann_format;

	/* 'cb_data' is not used in this specific callback. */
	(void)cb_data;

	if (!pd_ann_visible)
		return;

	if (!g_hash_table_lookup_extended(pd_ann_visible, pdata->pdo->di->inst_id,
			NULL, &ann_format))
		/* Not in the list of PDs whose annotations we're showing. */
		return;

	if (pdata->ann_format != GPOINTER_TO_INT(ann_format))
		/* We don't want this particular format from the PD. */
		return;

	annotations = pdata->data;
	if (opt_loglevel > SR_LOG_WARN)
		printf("%"PRIu64"-%"PRIu64" ", pdata->start_sample, pdata->end_sample);
	printf("%s: ", pdata->pdo->proto_id);
	for (i = 0; annotations[i]; i++)
		printf("\"%s\" ", annotations[i]);
	printf("\n");
	fflush(stdout);
}
#endif

int setup_output_format(void)
{
	GHashTable *fmtargs;
	GHashTableIter iter;
	gpointer key, value;
	struct sr_output_format **outputs;
	int i;
	char *fmtspec;

	if (opt_output_format && !strcmp(opt_output_format, "sigrok")) {
		/* Doesn't really exist as an output module - this is
		 * the session save mode. */
		g_free(opt_output_format);
		opt_output_format = NULL;
	}

	if (!opt_output_format) {
		opt_output_format = DEFAULT_OUTPUT_FORMAT;
		/* we'll need to remember this so when saving to a file
		 * later, sigrok session format will be used.
		 */
		default_output_format = TRUE;
	}

	fmtargs = parse_generic_arg(opt_output_format, TRUE);
	fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
	if (!fmtspec) {
		g_critical("Invalid output format.");
		return 1;
	}
	outputs = sr_output_list();
	for (i = 0; outputs[i]; i++) {
		if (strcmp(outputs[i]->id, fmtspec))
			continue;
		g_hash_table_remove(fmtargs, "sigrok_key");
		output_format = outputs[i];
		g_hash_table_iter_init(&iter, fmtargs);
		while (g_hash_table_iter_next(&iter, &key, &value)) {
			/* only supporting one parameter per output module
			 * for now, and only its value */
			output_format_param = g_strdup(value);
			break;
		}
		break;
	}
	if (!output_format) {
		g_critical("Invalid output format %s.", opt_output_format);
		return 1;
	}
	g_hash_table_destroy(fmtargs);

	return 0;
}

static int select_probes(struct sr_dev_inst *sdi)
{
	struct sr_probe *probe;
	GSList *selected_probes, *l;

	if (!opt_probes)
		return SR_OK;

	if (!(selected_probes = parse_probestring(sdi, opt_probes)))
		return SR_ERR;

	for (l = sdi->probes; l; l = l->next) {
		probe = l->data;
		if (g_slist_find(selected_probes, probe))
			probe->enabled = TRUE;
		else
			probe->enabled = FALSE;
	}
	g_slist_free(selected_probes);

	return SR_OK;
}

static struct sr_probe_group *select_probe_group(struct sr_dev_inst *sdi)
{
	struct sr_probe_group *pg;
	GSList *l;

	if (!opt_probe_group)
		return NULL;

	if (!sdi->probe_groups) {
		g_critical("This device does not have any probe groups.");
		return NULL;
	}

	for (l = sdi->probe_groups; l; l = l->next) {
		pg = l->data;
		if (!strcasecmp(opt_probe_group, pg->name)) {
			return pg;
		}
	}

	return NULL;
}

/**
 * Return the input file format which the CLI tool should use.
 *
 * If the user specified -I / --input-format, use that one. Otherwise, try to
 * autodetect the format as good as possible. Failing that, return NULL.
 *
 * @param filename The filename of the input file. Must not be NULL.
 * @param opt The -I / --input-file option the user specified (or NULL).
 *
 * @return A pointer to the 'struct sr_input_format' that should be used,
 *         or NULL if no input format was selected or auto-detected.
 */
static struct sr_input_format *determine_input_file_format(
			const char *filename, const char *opt)
{
	int i;
	struct sr_input_format **inputs;

	/* If there are no input formats, return NULL right away. */
	inputs = sr_input_list();
	if (!inputs) {
		g_critical("No supported input formats available.");
		return NULL;
	}

	/* If the user specified -I / --input-format, use that one. */
	if (opt) {
		for (i = 0; inputs[i]; i++) {
			if (strcasecmp(inputs[i]->id, opt))
				continue;
			g_debug("Using user-specified input file format '%s'.",
					inputs[i]->id);
			return inputs[i];
		}

		/* The user specified an unknown input format, return NULL. */
		g_critical("Error: specified input file format '%s' is "
			"unknown.", opt);
		return NULL;
	}

	/* Otherwise, try to find an input module that can handle this file. */
	for (i = 0; inputs[i]; i++) {
		if (inputs[i]->format_match(filename))
			break;
	}

	/* Return NULL if no input module wanted to touch this. */
	if (!inputs[i]) {
		g_critical("Error: no matching input module found.");
		return NULL;
	}

	g_debug("cli: Autodetected '%s' input format for file '%s'.",
		inputs[i]->id, filename);
		
	return inputs[i];
}

static void load_input_file_format(void)
{
	GHashTable *fmtargs = NULL;
	struct stat st;
	struct sr_input *in;
	struct sr_input_format *input_format;
	char *fmtspec = NULL;

	if (opt_input_format) {
		fmtargs = parse_generic_arg(opt_input_format, TRUE);
		fmtspec = g_hash_table_lookup(fmtargs, "sigrok_key");
	}

	if (!(input_format = determine_input_file_format(opt_input_file,
						   fmtspec))) {
		/* The exact cause was already logged. */
		return;
	}

	if (fmtargs)
		g_hash_table_remove(fmtargs, "sigrok_key");

	if (stat(opt_input_file, &st) == -1) {
		g_critical("Failed to load %s: %s", opt_input_file,
			strerror(errno));
		exit(1);
	}

	/* Initialize the input module. */
	if (!(in = g_try_malloc(sizeof(struct sr_input)))) {
		g_critical("Failed to allocate input module.");
		exit(1);
	}
	in->format = input_format;
	in->param = fmtargs;
	if (in->format->init) {
		if (in->format->init(in, opt_input_file) != SR_OK) {
			g_critical("Input format init failed.");
			exit(1);
		}
	}

	if (select_probes(in->sdi) > 0)
		return;

	sr_session_new();
	sr_session_datafeed_callback_add(datafeed_in, NULL);
	if (sr_session_dev_add(in->sdi) != SR_OK) {
		g_critical("Failed to use device.");
		sr_session_destroy();
		return;
	}

	input_format->loadfile(in, opt_input_file);

	sr_session_destroy();

	if (fmtargs)
		g_hash_table_destroy(fmtargs);
}

static void load_input_file(void)
{

	if (sr_session_load(opt_input_file) == SR_OK) {
		/* sigrok session file */
		sr_session_datafeed_callback_add(datafeed_in, NULL);
		sr_session_start();
		sr_session_run();
		sr_session_stop();
	}
	else {
		/* fall back on input modules */
		load_input_file_format();
	}
}

static int set_dev_options(struct sr_dev_inst *sdi, GHashTable *args)
{
	const struct sr_config_info *srci;
	struct sr_probe_group *pg;
	GHashTableIter iter;
	gpointer key, value;
	int ret;
	double tmp_double;
	uint64_t tmp_u64, p, q, low, high;
	gboolean tmp_bool;
	GVariant *val, *rational[2], *range[2];

	g_hash_table_iter_init(&iter, args);
	while (g_hash_table_iter_next(&iter, &key, &value)) {
		if (!(srci = sr_config_info_name_get(key))) {
			g_critical("Unknown device option '%s'.", (char *) key);
			return SR_ERR;
		}

		if ((value == NULL) &&
			(srci->datatype != SR_T_BOOL)) {
			g_critical("Option '%s' needs a value.", (char *)key);
			return SR_ERR;
		}
		val = NULL;
		switch (srci->datatype) {
		case SR_T_UINT64:
			ret = sr_parse_sizestring(value, &tmp_u64);
			if (ret != SR_OK)
				break;
			val = g_variant_new_uint64(tmp_u64);
			break;
		case SR_T_CHAR:
			val = g_variant_new_string(value);
			break;
		case SR_T_BOOL:
			if (!value)
				tmp_bool = TRUE;
			else
				tmp_bool = sr_parse_boolstring(value);
			val = g_variant_new_boolean(tmp_bool);
			break;
		case SR_T_FLOAT:
			tmp_double = strtof(value, NULL);
			val = g_variant_new_double(tmp_double);
			break;
		case SR_T_RATIONAL_PERIOD:
			if ((ret = sr_parse_period(value, &p, &q)) != SR_OK)
				break;
			rational[0] = g_variant_new_uint64(p);
			rational[1] = g_variant_new_uint64(q);
			val = g_variant_new_tuple(rational, 2);
			break;
		case SR_T_RATIONAL_VOLT:
			if ((ret = sr_parse_voltage(value, &p, &q)) != SR_OK)
				break;
			rational[0] = g_variant_new_uint64(p);
			rational[1] = g_variant_new_uint64(q);
			val = g_variant_new_tuple(rational, 2);
			break;
		case SR_T_UINT64_RANGE:
			if (sscanf(value, "%"PRIu64"-%"PRIu64, &low, &high) != 2) {
				ret = SR_ERR;
				break;
			} else {
				range[0] = g_variant_new_uint64(low);
				range[1] = g_variant_new_uint64(high);
				val = g_variant_new_tuple(range, 2);
			}
			break;
		default:
			ret = SR_ERR;
		}
		if (val) {
			pg = select_probe_group(sdi);
			ret = sr_config_set(sdi, pg, srci->key, val);
		}
		if (ret != SR_OK) {
			g_critical("Failed to set device option '%s'.", (char *)key);
			return ret;
		}
	}

	return SR_OK;
}

static void set_options(void)
{
	struct sr_dev_inst *sdi;
	GSList *devices;
	GHashTable *devargs;

	if (!opt_config) {
		g_critical("No setting specified.");
		return;
	}

	if (!(devargs = parse_generic_arg(opt_config, FALSE)))
		return;

	if (!(devices = device_scan())) {
		g_critical("No devices found.");
		return;
	}
	sdi = devices->data;

	if (sr_dev_open(sdi) != SR_OK) {
		g_critical("Failed to open device.");
		return;
	}

	set_dev_options(sdi, devargs);

	sr_dev_close(sdi);
	g_slist_free(devices);
	g_hash_table_destroy(devargs);

}

static int set_limit_time(const struct sr_dev_inst *sdi)
{
	GVariant *gvar;
	uint64_t time_msec;
	uint64_t samplerate;

	if (!(time_msec = sr_parse_timestring(opt_time))) {
		g_critical("Invalid time '%s'", opt_time);
		return SR_ERR;
	}

	if (sr_dev_has_option(sdi, SR_CONF_LIMIT_MSEC)) {
		gvar = g_variant_new_uint64(time_msec);
		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_MSEC, gvar) != SR_OK) {
			g_critical("Failed to configure time limit.");
			return SR_ERR;
		}
	} else if (sr_dev_has_option(sdi, SR_CONF_SAMPLERATE)) {
		/* Convert to samples based on the samplerate.  */
		sr_config_get(sdi->driver, sdi, NULL, SR_CONF_SAMPLERATE, &gvar);
		samplerate = g_variant_get_uint64(gvar);
		g_variant_unref(gvar);
		limit_samples = (samplerate) * time_msec / (uint64_t)1000;
		if (limit_samples == 0) {
			g_critical("Not enough time at this samplerate.");
			return SR_ERR;
		}
		gvar = g_variant_new_uint64(limit_samples);
		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
			g_critical("Failed to configure time-based sample limit.");
			return SR_ERR;
		}
	} else {
		g_critical("This device does not support time limits.");
		return SR_ERR;
	}

	return SR_OK;
}

static void run_session(void)
{
	GSList *devices;
	GHashTable *devargs;
	GVariant *gvar;
	struct sr_dev_inst *sdi;
	int max_probes, i;
	char **triggerlist;

	devices = device_scan();
	if (!devices) {
		g_critical("No devices found.");
		return;
	}
	if (g_slist_length(devices) > 1) {
		g_critical("sigrok-cli only supports one device for capturing.");
		return;
	}
	sdi = devices->data;

	sr_session_new();
	sr_session_datafeed_callback_add(datafeed_in, NULL);

	if (sr_dev_open(sdi) != SR_OK) {
		g_critical("Failed to open device.");
		return;
	}

	if (sr_session_dev_add(sdi) != SR_OK) {
		g_critical("Failed to add device to session.");
		sr_session_destroy();
		return;
	}

	if (opt_config) {
		if ((devargs = parse_generic_arg(opt_config, FALSE))) {
			if (set_dev_options(sdi, devargs) != SR_OK)
				return;
			g_hash_table_destroy(devargs);
		}
	}

	if (select_probes(sdi) != SR_OK) {
		g_critical("Failed to set probes.");
		sr_session_destroy();
		return;
	}

	if (opt_triggers) {
		if (!(triggerlist = sr_parse_triggerstring(sdi, opt_triggers))) {
			sr_session_destroy();
			return;
		}
		max_probes = g_slist_length(sdi->probes);
		for (i = 0; i < max_probes; i++) {
			if (triggerlist[i]) {
				sr_dev_trigger_set(sdi, i, triggerlist[i]);
				g_free(triggerlist[i]);
			}
		}
		g_free(triggerlist);
	}

	if (opt_continuous) {
		if (!sr_dev_has_option(sdi, SR_CONF_CONTINUOUS)) {
			g_critical("This device does not support continuous sampling.");
			sr_session_destroy();
			return;
		}
	}

	if (opt_time) {
		if (set_limit_time(sdi) != SR_OK) {
			sr_session_destroy();
			return;
		}
	}

	if (opt_samples) {
		if ((sr_parse_sizestring(opt_samples, &limit_samples) != SR_OK)) {
			g_critical("Invalid sample limit '%s'.", opt_samples);
			sr_session_destroy();
			return;
		}
		gvar = g_variant_new_uint64(limit_samples);
		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_SAMPLES, gvar) != SR_OK) {
			g_critical("Failed to configure sample limit.");
			sr_session_destroy();
			return;
		}
	}

	if (opt_frames) {
		if ((sr_parse_sizestring(opt_frames, &limit_frames) != SR_OK)) {
			g_critical("Invalid sample limit '%s'.", opt_samples);
			sr_session_destroy();
			return;
		}
		gvar = g_variant_new_uint64(limit_frames);
		if (sr_config_set(sdi, NULL, SR_CONF_LIMIT_FRAMES, gvar) != SR_OK) {
			g_critical("Failed to configure frame limit.");
			sr_session_destroy();
			return;
		}
	}

	if (sr_session_start() != SR_OK) {
		g_critical("Failed to start session.");
		sr_session_destroy();
		return;
	}

	if (opt_continuous)
		add_anykey();

	sr_session_run();

	if (opt_continuous)
		clear_anykey();

	sr_session_datafeed_callback_remove_all();
	sr_session_destroy();
	g_slist_free(devices);

}

static void logger(const gchar *log_domain, GLogLevelFlags log_level,
		   const gchar *message, gpointer cb_data)
{
	(void)log_domain;
	(void)cb_data;

	/*
	 * All messages, warnings, errors etc. go to stderr (not stdout) in
	 * order to not mess up the CLI tool data output, e.g. VCD output.
	 */
	if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING)
			|| opt_loglevel > SR_LOG_WARN) {
		fprintf(stderr, "%s\n", message);
		fflush(stderr);
	}

	if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL))
		exit(1);

}

int main(int argc, char **argv)
{
	GOptionContext *context;
	GError *error;
	int ret;
	char *help;

	g_log_set_default_handler(logger, NULL);

	context = g_option_context_new(NULL);
	g_option_context_add_main_entries(context, optargs, NULL);

	ret = 1;
	error = NULL;
	if (!g_option_context_parse(context, &argc, &argv, &error)) {
		g_critical("%s", error->message);
		goto done;
	}

	/* Set the loglevel (amount of messages to output) for libsigrok. */
	if (sr_log_loglevel_set(opt_loglevel) != SR_OK)
		goto done;

	if (sr_init(&sr_ctx) != SR_OK)
		goto done;

#ifdef HAVE_SRD
	/* Set the loglevel (amount of messages to output) for libsigrokdecode. */
	if (srd_log_loglevel_set(opt_loglevel) != SRD_OK)
		goto done;

	if (opt_pds) {
		if (srd_init(NULL) != SRD_OK)
			goto done;
		if (srd_session_new(&srd_sess) != SRD_OK) {
			g_critical("Failed to create new decode session.");
			goto done;
		}
		if (register_pds(NULL, opt_pds) != 0)
			goto done;
		if (srd_pd_output_callback_add(srd_sess, SRD_OUTPUT_ANN,
				show_pd_annotations, NULL) != SRD_OK)
			goto done;
		if (setup_pd_stack() != 0)
			goto done;
		if (setup_pd_annotations() != 0)
			goto done;
	}
#endif

	if (setup_output_format() != 0)
		goto done;

	if (opt_version)
		show_version();
	else if (opt_scan_devs)
		show_dev_list();
#ifdef HAVE_SRD
	else if (opt_pds && opt_show)
		show_pd_detail();
#endif
	else if (opt_show)
		show_dev_detail();
	else if (opt_input_file)
		load_input_file();
	else if (opt_set)
		set_options();
	else if (opt_samples || opt_time || opt_frames || opt_continuous)
		run_session();
	else {
		help = g_option_context_get_help(context, TRUE, NULL);
		printf("%s", help);
		g_free(help);
	}

#ifdef HAVE_SRD
	if (opt_pds)
		srd_exit();
#endif

	ret = 0;

done:
	if (sr_ctx)
		sr_exit(sr_ctx);

	g_option_context_free(context);

	return ret;
}