decode.c - chromiumos/third_party/libsigrok-cli - Git at Google

 /*
  * This file is part of the sigrok-cli project.
  *
  * Copyright (C) 2013 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 <stdlib.h>
 #include <string.h>
 #include "sigrok-cli.h"
 #include "config.h"
 #include <glib.h>

 #ifdef HAVE_SRD
 static GHashTable *pd_ann_visible = NULL;
 static GHashTable *pd_meta_visible = NULL;
 static GHashTable *pd_binary_visible = NULL;
 static GHashTable *pd_channel_maps = NULL;

 extern struct srd_session *srd_sess;

 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 move_hash_element(GHashTable *src, GHashTable *dest, void *key)
 {
 	void *orig_key, *value;

 	if (!g_hash_table_lookup_extended(src, key, &orig_key, &value))
 		/* Not specified. */
 		return FALSE;
 	g_hash_table_steal(src, orig_key);
 	g_hash_table_insert(dest, orig_key, value);

 	return TRUE;
 }

 static GHashTable *extract_channel_map(struct srd_decoder *dec, GHashTable *hash)
 {
 	GHashTable *channel_map;
 	struct srd_channel *pdch;
 	GSList *l;

 	channel_map = g_hash_table_new_full(g_str_hash, g_str_equal,
 					  g_free, g_free);

 	for (l = dec->channels; l; l = l->next) {
 		pdch = l->data;
 		move_hash_element(hash, channel_map, pdch->id);
 	}
 	for (l = dec->opt_channels; l; l = l->next) {
 		pdch = l->data;
 		move_hash_element(hash, channel_map, pdch->id);
 	}

 	return channel_map;
 }

 /* 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.
  */
 int register_pds(const char *opt_pds, char *opt_pd_annotations)
 {
 	struct srd_decoder *dec;
 	GHashTable *pd_opthash, *options, *channels;
 	GList *leftover, *l;
 	struct srd_decoder_inst *di;
 	int ret;
 	char **pdtokens, **pdtok, *pd_name;

 	pd_ann_visible = g_hash_table_new_full(g_str_hash, g_str_equal,
 					       g_free, NULL);
 	ret = 0;
 	pd_name = NULL;
 	pd_opthash = options = channels = pd_channel_maps = NULL;
 	pdtokens = g_strsplit(opt_pds, ",", 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;
 		}
 		if (!(dec = srd_decoder_get_by_id(pd_name))) {
 			g_critical("Failed to get decoder %s by id.", pd_name);
 			ret = 1;
 			break;
 		}

 		/* Convert decoder option and channel values to GVariant. */
 		if (!opts_to_gvar(dec, pd_opthash, &options)) {
 			ret = 1;
 			break;
 		}
 		channels = extract_channel_map(dec, pd_opthash);

 		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 channel '%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 (pdtok == pdtokens) {
 			/*
 			 * Save the channel setup for later, but only on the
 			 * first decoder (stacked decoders don't get channels).
 			 */
 			pd_channel_maps = g_hash_table_new_full(g_str_hash,
 					g_str_equal, g_free, (GDestroyNotify)g_hash_table_destroy);
 			g_hash_table_insert(pd_channel_maps, g_strdup(di->inst_id), channels);
 			channels = NULL;
 		}

 		/* 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),
 					g_slist_append(NULL, GINT_TO_POINTER(-1)));
 	}

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

 	return ret;
 }

 static void map_pd_inst_channels(void *key, void *value, void *user_data)
 {
 	GHashTable *channel_map;
 	GHashTable *channel_indices;
 	GSList *channel_list;
 	struct srd_decoder_inst *di;
 	GVariant *var;
 	void *channel_id;
 	void *channel_target;
 	struct sr_channel *ch;
 	GHashTableIter iter;
 	int num_channels;

 	channel_map = value;
 	channel_list = user_data;

 	di = srd_inst_find_by_id(srd_sess, key);
 	if (!di) {
 		g_critical("Protocol decoder instance \"%s\" not found.",
 			   (char *)key);
 		return;
 	}
 	channel_indices = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
 					      (GDestroyNotify)g_variant_unref);

 	g_hash_table_iter_init(&iter, channel_map);
 	while (g_hash_table_iter_next(&iter, &channel_id, &channel_target)) {
 		ch = find_channel(channel_list, channel_target);
 		if (!ch) {
 			g_printerr("cli: No channel with name \"%s\" found.\n",
 				   (char *)channel_target);
 			continue;
 		}
 		if (!ch->enabled)
 			g_printerr("cli: Target channel \"%s\" not enabled.\n",
 				   (char *)channel_target);

 		var = g_variant_new_int32(ch->index);
 		g_variant_ref_sink(var);
 		g_hash_table_insert(channel_indices, g_strdup(channel_id), var);
 	}

 	num_channels = g_slist_length(channel_list);
 	srd_inst_channel_set_all(di, channel_indices, (num_channels + 7) / 8);
 }

 void map_pd_channels(struct sr_dev_inst *sdi)
 {
 	if (pd_channel_maps) {
 		g_hash_table_foreach(pd_channel_maps, &map_pd_inst_channels,
 				     sdi->channels);
 		g_hash_table_destroy(pd_channel_maps);
 		pd_channel_maps = NULL;
 	}
 }

 int setup_pd_stack(char *opt_pds, char *opt_pd_stack, char *opt_pd_annotations)
 {
 	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(char *opt_pd_annotations)
 {
 	GSList *l, *l_ann;
 	struct srd_decoder *dec;
 	int ann_class;
 	char **pds, **pdtok, **keyval, **annlist, **ann, **ann_descr;

 	/* Set up custom list of PDs and annotations to show. */
 	pds = g_strsplit(opt_pd_annotations, ",", 0);
 	for (pdtok = pds; *pdtok && **pdtok; pdtok++) {
 		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 && keyval[1][0] != '\0') {
 			annlist = g_strsplit(keyval[1], ":", 0);
 			for (ann = annlist; *ann && **ann; ann++) {
 				ann_class = 0;
 				for (l = dec->annotations; l; l = l->next, ann_class++) {
 					ann_descr = l->data;
 					if (!canon_cmp(ann_descr[0], *ann))
 						/* Found it. */
 						break;
 				}
 				if (!l) {
 					g_critical("Annotation '%s' not found "
 							"for protocol decoder '%s'.", *ann, keyval[0]);
 					return 1;
 				}
 				l_ann = g_hash_table_lookup(pd_ann_visible, keyval[0]);
 				l_ann = g_slist_append(l_ann, GINT_TO_POINTER(ann_class));
 				g_hash_table_replace(pd_ann_visible, g_strdup(keyval[0]), l_ann);
 				g_debug("cli: Showing protocol decoder %s annotation "
 						"class %d (%s).", keyval[0], ann_class, ann_descr[0]);
 			}
 		} else {
 			/* No class specified: show all of them. */
 				g_hash_table_insert(pd_ann_visible, g_strdup(keyval[0]),
 						g_slist_append(NULL, GINT_TO_POINTER(-1)));
 			g_debug("cli: Showing all annotation classes for protocol "
 					"decoder %s.", keyval[0]);
 		}
 		g_strfreev(keyval);
 	}
 	g_strfreev(pds);

 	return 0;
 }

 int setup_pd_meta(char *opt_pd_meta)
 {
 	struct srd_decoder *dec;
 	char **pds, **pdtok;

 	pd_meta_visible = g_hash_table_new_full(g_str_hash, g_int_equal,
 			g_free, NULL);
 	pds = g_strsplit(opt_pd_meta, ",", 0);
 	for (pdtok = pds; *pdtok && **pdtok; pdtok++) {
 		if (!(dec = srd_decoder_get_by_id(*pdtok))) {
 			g_critical("Protocol decoder '%s' not found.", *pdtok);
 			return 1;
 		}
 		g_debug("cli: Showing protocol decoder meta output from '%s'.", *pdtok);
 		g_hash_table_insert(pd_meta_visible, g_strdup(*pdtok), NULL);
 	}
 	g_strfreev(pds);

 	return 0;
 }

 int setup_pd_binary(char *opt_pd_binary)
 {
 	GSList *l;
 	struct srd_decoder *dec;
 	int bin_class;
 	char **pds, **pdtok, **keyval, **bin_name;

 	pd_binary_visible = g_hash_table_new_full(g_str_hash, g_int_equal,
 			g_free, NULL);
 	pds = g_strsplit(opt_pd_binary, ",", 0);
 	for (pdtok = pds; *pdtok && **pdtok; pdtok++) {
 		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->binary) {
 			g_critical("Protocol decoder '%s' has no binary output.", keyval[0]);
 			return 1;
 		}
 		bin_class = 0;
 		if (g_strv_length(keyval) == 2) {
 			for (l = dec->binary; l; l = l->next, bin_class++) {
 				bin_name = l->data;
 				if (!strcmp(bin_name[0], keyval[1]))
 					/* Found it. */
 					break;
 			}
 			if (!l) {
 				g_critical("binary output '%s' not found "
 						"for protocol decoder '%s'.", keyval[1], keyval[0]);
 				return 1;
 			}
 			g_debug("cli: Showing protocol decoder %s binary class "
 					"%d (%s).", keyval[0], bin_class, bin_name[0]);
 		} else {
 			/* No class specified: output all of them. */
 			bin_class = -1;
 			g_debug("cli: Showing all binary classes for protocol "
 					"decoder %s.", keyval[0]);
 		}
 		g_hash_table_insert(pd_binary_visible, g_strdup(keyval[0]), GINT_TO_POINTER(bin_class));
 		g_strfreev(keyval);
 	}
 	g_strfreev(pds);

 	return 0;
 }

 void show_pd_annotations(struct srd_proto_data *pdata, void *cb_data)
 {
 	struct srd_decoder *dec;
 	struct srd_proto_data_annotation *pda;
 	GSList *ann_list, *l;
 	int i;
 	char **ann_descr;
 	gboolean show;

 	/* '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, (void **)&ann_list))
 		/* Not in the list of PDs whose annotations we're showing. */
 		return;

 	dec = pdata->pdo->di->decoder;
 	pda = pdata->data;
 	show = FALSE;
 	for (l = ann_list; l; l = l->next) {
 		if (GPOINTER_TO_INT(l->data) == -1
 				|| GPOINTER_TO_INT(l->data) == pda->ann_class) {
 			show = TRUE;
 			break;
 		}
 	}
 	if (!show)
 		return;

 	if (opt_loglevel <= SR_LOG_WARN) {
 		/* Show only the longest annotation. */
 		printf("%s", pda->ann_text[0]);
 	} else if (opt_loglevel >= SR_LOG_INFO) {
 		/* Sample numbers and quotes around the longest annotation. */
 		printf("%"PRIu64"-%"PRIu64"", pdata->start_sample, pdata->end_sample);
 		if (opt_loglevel == SR_LOG_INFO) {
 			printf(" \"%s\"", pda->ann_text[0]);
 		} else {
 			/* Protocol decoder id, annotation class,
 			 * all annotation strings. */
 			ann_descr = g_slist_nth_data(dec->annotations, pda->ann_class);
 			printf(" %s: %s:", pdata->pdo->proto_id, ann_descr[0]);
 			for (i = 0; pda->ann_text[i]; i++)
 				printf(" \"%s\"", pda->ann_text[i]);
 		}
 	}
 	printf("\n");
 	fflush(stdout);
 }

 void show_pd_meta(struct srd_proto_data *pdata, void *cb_data)
 {

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

 	if (!g_hash_table_lookup_extended(pd_meta_visible,
 			pdata->pdo->di->decoder->id, NULL, NULL))
 		/* Not in the list of PDs whose meta output we're showing. */
 		return;

 	if (opt_loglevel > SR_LOG_WARN)
 		printf("%"PRIu64"-%"PRIu64" ", pdata->start_sample, pdata->end_sample);
 	printf("%s: ", pdata->pdo->proto_id);
 	printf("%s: %s", pdata->pdo->meta_name, g_variant_print(pdata->data, FALSE));
 	printf("\n");
 	fflush(stdout);
 }

 void show_pd_binary(struct srd_proto_data *pdata, void *cb_data)
 {
 	struct srd_proto_data_binary *pdb;
 	gpointer classp;
 	int class;

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

 	if (!g_hash_table_lookup_extended(pd_binary_visible,
 			pdata->pdo->di->decoder->id, NULL, (void **)&classp))
 		/* Not in the list of PDs whose meta output we're showing. */
 		return;

 	class = GPOINTER_TO_INT(classp);
 	pdb = pdata->data;
 	if (class != -1 && class != pdb->bin_class)
 		/* Not showing this binary class. */
 		return;

 	/* Just send the binary output to stdout, no embellishments. */
 	fwrite(pdb->data, pdb->size, 1, stdout);
 	fflush(stdout);
 }
 #endif
	/*
	* This file is part of the sigrok-cli project.
	*
	* Copyright (C) 2013 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 <stdlib.h>
	#include <string.h>
	#include "sigrok-cli.h"
	#include "config.h"
	#include <glib.h>

	#ifdef HAVE_SRD
	static GHashTable *pd_ann_visible = NULL;
	static GHashTable *pd_meta_visible = NULL;
	static GHashTable *pd_binary_visible = NULL;
	static GHashTable *pd_channel_maps = NULL;

	extern struct srd_session *srd_sess;

	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 move_hash_element(GHashTable src, GHashTable dest, void *key)
	{
	void orig_key, value;

	if (!g_hash_table_lookup_extended(src, key, &orig_key, &value))
	/* Not specified. */
	return FALSE;
	g_hash_table_steal(src, orig_key);
	g_hash_table_insert(dest, orig_key, value);

	return TRUE;
	}

	static GHashTable extract_channel_map(struct srd_decoder dec, GHashTable *hash)
	{
	GHashTable *channel_map;
	struct srd_channel *pdch;
	GSList *l;

	channel_map = g_hash_table_new_full(g_str_hash, g_str_equal,
	g_free, g_free);

	for (l = dec->channels; l; l = l->next) {
	pdch = l->data;
	move_hash_element(hash, channel_map, pdch->id);
	}
	for (l = dec->opt_channels; l; l = l->next) {
	pdch = l->data;
	move_hash_element(hash, channel_map, pdch->id);
	}

	return channel_map;
	}

	/* 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.
	*/
	int register_pds(const char opt_pds, char opt_pd_annotations)
	{
	struct srd_decoder *dec;
	GHashTable pd_opthash, options, *channels;
	GList leftover, l;
	struct srd_decoder_inst *di;
	int ret;
	char pdtokens, pdtok, *pd_name;

	pd_ann_visible = g_hash_table_new_full(g_str_hash, g_str_equal,
	g_free, NULL);
	ret = 0;
	pd_name = NULL;
	pd_opthash = options = channels = pd_channel_maps = NULL;
	pdtokens = g_strsplit(opt_pds, ",", 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;
	}
	if (!(dec = srd_decoder_get_by_id(pd_name))) {
	g_critical("Failed to get decoder %s by id.", pd_name);
	ret = 1;
	break;
	}

	/* Convert decoder option and channel values to GVariant. */
	if (!opts_to_gvar(dec, pd_opthash, &options)) {
	ret = 1;
	break;
	}
	channels = extract_channel_map(dec, pd_opthash);

	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 channel '%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 (pdtok == pdtokens) {
	/*
	* Save the channel setup for later, but only on the
	* first decoder (stacked decoders don't get channels).
	*/
	pd_channel_maps = g_hash_table_new_full(g_str_hash,
	g_str_equal, g_free, (GDestroyNotify)g_hash_table_destroy);
	g_hash_table_insert(pd_channel_maps, g_strdup(di->inst_id), channels);
	channels = NULL;
	}

	/* 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),
	g_slist_append(NULL, GINT_TO_POINTER(-1)));
	}

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

	return ret;
	}

	static void map_pd_inst_channels(void key, void value, void *user_data)
	{
	GHashTable *channel_map;
	GHashTable *channel_indices;
	GSList *channel_list;
	struct srd_decoder_inst *di;
	GVariant *var;
	void *channel_id;
	void *channel_target;
	struct sr_channel *ch;
	GHashTableIter iter;
	int num_channels;

	channel_map = value;
	channel_list = user_data;

	di = srd_inst_find_by_id(srd_sess, key);
	if (!di) {
	g_critical("Protocol decoder instance \"%s\" not found.",
	(char *)key);
	return;
	}
	channel_indices = g_hash_table_new_full(g_str_hash, g_str_equal, g_free,
	(GDestroyNotify)g_variant_unref);

	g_hash_table_iter_init(&iter, channel_map);
	while (g_hash_table_iter_next(&iter, &channel_id, &channel_target)) {
	ch = find_channel(channel_list, channel_target);
	if (!ch) {
	g_printerr("cli: No channel with name \"%s\" found.\n",
	(char *)channel_target);
	continue;
	}
	if (!ch->enabled)
	g_printerr("cli: Target channel \"%s\" not enabled.\n",
	(char *)channel_target);

	var = g_variant_new_int32(ch->index);
	g_variant_ref_sink(var);
	g_hash_table_insert(channel_indices, g_strdup(channel_id), var);
	}

	num_channels = g_slist_length(channel_list);
	srd_inst_channel_set_all(di, channel_indices, (num_channels + 7) / 8);
	}

	void map_pd_channels(struct sr_dev_inst *sdi)
	{
	if (pd_channel_maps) {
	g_hash_table_foreach(pd_channel_maps, &map_pd_inst_channels,
	sdi->channels);
	g_hash_table_destroy(pd_channel_maps);
	pd_channel_maps = NULL;
	}
	}

	int setup_pd_stack(char opt_pds, char opt_pd_stack, char *opt_pd_annotations)
	{
	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(char *opt_pd_annotations)
	{
	GSList l, l_ann;
	struct srd_decoder *dec;
	int ann_class;
	char pds, pdtok, keyval, annlist, ann, ann_descr;

	/* Set up custom list of PDs and annotations to show. */
	pds = g_strsplit(opt_pd_annotations, ",", 0);
	for (pdtok = pds; pdtok && *pdtok; pdtok++) {
	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 && keyval[1][0] != '\0') {
	annlist = g_strsplit(keyval[1], ":", 0);
	for (ann = annlist; ann && *ann; ann++) {
	ann_class = 0;
	for (l = dec->annotations; l; l = l->next, ann_class++) {
	ann_descr = l->data;
	if (!canon_cmp(ann_descr[0], *ann))
	/* Found it. */
	break;
	}
	if (!l) {
	g_critical("Annotation '%s' not found "
	"for protocol decoder '%s'.", *ann, keyval[0]);
	return 1;
	}
	l_ann = g_hash_table_lookup(pd_ann_visible, keyval[0]);
	l_ann = g_slist_append(l_ann, GINT_TO_POINTER(ann_class));
	g_hash_table_replace(pd_ann_visible, g_strdup(keyval[0]), l_ann);
	g_debug("cli: Showing protocol decoder %s annotation "
	"class %d (%s).", keyval[0], ann_class, ann_descr[0]);
	}
	} else {
	/* No class specified: show all of them. */
	g_hash_table_insert(pd_ann_visible, g_strdup(keyval[0]),
	g_slist_append(NULL, GINT_TO_POINTER(-1)));
	g_debug("cli: Showing all annotation classes for protocol "
	"decoder %s.", keyval[0]);
	}
	g_strfreev(keyval);
	}
	g_strfreev(pds);

	return 0;
	}

	int setup_pd_meta(char *opt_pd_meta)
	{
	struct srd_decoder *dec;
	char pds, pdtok;

	pd_meta_visible = g_hash_table_new_full(g_str_hash, g_int_equal,
	g_free, NULL);
	pds = g_strsplit(opt_pd_meta, ",", 0);
	for (pdtok = pds; pdtok && *pdtok; pdtok++) {
	if (!(dec = srd_decoder_get_by_id(*pdtok))) {
	g_critical("Protocol decoder '%s' not found.", *pdtok);
	return 1;
	}
	g_debug("cli: Showing protocol decoder meta output from '%s'.", *pdtok);
	g_hash_table_insert(pd_meta_visible, g_strdup(*pdtok), NULL);
	}
	g_strfreev(pds);

	return 0;
	}

	int setup_pd_binary(char *opt_pd_binary)
	{
	GSList *l;
	struct srd_decoder *dec;
	int bin_class;
	char pds, pdtok, keyval, bin_name;

	pd_binary_visible = g_hash_table_new_full(g_str_hash, g_int_equal,
	g_free, NULL);
	pds = g_strsplit(opt_pd_binary, ",", 0);
	for (pdtok = pds; pdtok && *pdtok; pdtok++) {
	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->binary) {
	g_critical("Protocol decoder '%s' has no binary output.", keyval[0]);
	return 1;
	}
	bin_class = 0;
	if (g_strv_length(keyval) == 2) {
	for (l = dec->binary; l; l = l->next, bin_class++) {
	bin_name = l->data;
	if (!strcmp(bin_name[0], keyval[1]))
	/* Found it. */
	break;
	}
	if (!l) {
	g_critical("binary output '%s' not found "
	"for protocol decoder '%s'.", keyval[1], keyval[0]);
	return 1;
	}
	g_debug("cli: Showing protocol decoder %s binary class "
	"%d (%s).", keyval[0], bin_class, bin_name[0]);
	} else {
	/* No class specified: output all of them. */
	bin_class = -1;
	g_debug("cli: Showing all binary classes for protocol "
	"decoder %s.", keyval[0]);
	}
	g_hash_table_insert(pd_binary_visible, g_strdup(keyval[0]), GINT_TO_POINTER(bin_class));
	g_strfreev(keyval);
	}
	g_strfreev(pds);

	return 0;
	}

	void show_pd_annotations(struct srd_proto_data pdata, void cb_data)
	{
	struct srd_decoder *dec;
	struct srd_proto_data_annotation *pda;
	GSList ann_list, l;
	int i;
	char **ann_descr;
	gboolean show;

	/* '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, (void **)&ann_list))
	/* Not in the list of PDs whose annotations we're showing. */
	return;

	dec = pdata->pdo->di->decoder;
	pda = pdata->data;
	show = FALSE;
	for (l = ann_list; l; l = l->next) {
	if (GPOINTER_TO_INT(l->data) == -1
	\|\| GPOINTER_TO_INT(l->data) == pda->ann_class) {
	show = TRUE;
	break;
	}
	}
	if (!show)
	return;

	if (opt_loglevel <= SR_LOG_WARN) {
	/* Show only the longest annotation. */
	printf("%s", pda->ann_text[0]);
	} else if (opt_loglevel >= SR_LOG_INFO) {
	/* Sample numbers and quotes around the longest annotation. */
	printf("%"PRIu64"-%"PRIu64"", pdata->start_sample, pdata->end_sample);
	if (opt_loglevel == SR_LOG_INFO) {
	printf(" \"%s\"", pda->ann_text[0]);
	} else {
	/* Protocol decoder id, annotation class,
	* all annotation strings. */
	ann_descr = g_slist_nth_data(dec->annotations, pda->ann_class);
	printf(" %s: %s:", pdata->pdo->proto_id, ann_descr[0]);
	for (i = 0; pda->ann_text[i]; i++)
	printf(" \"%s\"", pda->ann_text[i]);
	}
	}
	printf("\n");
	fflush(stdout);
	}

	void show_pd_meta(struct srd_proto_data pdata, void cb_data)
	{

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

	if (!g_hash_table_lookup_extended(pd_meta_visible,
	pdata->pdo->di->decoder->id, NULL, NULL))
	/* Not in the list of PDs whose meta output we're showing. */
	return;

	if (opt_loglevel > SR_LOG_WARN)
	printf("%"PRIu64"-%"PRIu64" ", pdata->start_sample, pdata->end_sample);
	printf("%s: ", pdata->pdo->proto_id);
	printf("%s: %s", pdata->pdo->meta_name, g_variant_print(pdata->data, FALSE));
	printf("\n");
	fflush(stdout);
	}

	void show_pd_binary(struct srd_proto_data pdata, void cb_data)
	{
	struct srd_proto_data_binary *pdb;
	gpointer classp;
	int class;

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

	if (!g_hash_table_lookup_extended(pd_binary_visible,
	pdata->pdo->di->decoder->id, NULL, (void **)&classp))
	/* Not in the list of PDs whose meta output we're showing. */
	return;

	class = GPOINTER_TO_INT(classp);
	pdb = pdata->data;
	if (class != -1 && class != pdb->bin_class)
	/* Not showing this binary class. */
	return;

	/* Just send the binary output to stdout, no embellishments. */
	fwrite(pdb->data, pdb->size, 1, stdout);
	fflush(stdout);
	}
	#endif