2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
25 #include <libsigrok/libsigrok.h>
26 #include "libsigrok-internal.h"
28 #define LOG_PREFIX "output/analog"
31 int num_enabled_channels;
32 GPtrArray *channellist;
42 static int init(struct sr_output *o, GHashTable *options)
45 struct sr_channel *ch;
52 o->priv = ctx = g_malloc0(sizeof(struct context));
53 s = g_variant_get_string(g_hash_table_lookup(options, "digits"), NULL);
54 if (!strcmp(s, "all"))
55 ctx->digits = DIGITS_ALL;
57 ctx->digits = DIGITS_SPEC;
59 /* Get the number of channels and their names. */
60 ctx->channellist = g_ptr_array_new();
61 for (l = o->sdi->channels; l; l = l->next) {
63 if (!ch || !ch->enabled)
65 g_ptr_array_add(ctx->channellist, ch->name);
66 ctx->num_enabled_channels++;
73 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
77 const struct sr_datafeed_analog *analog;
78 struct sr_channel *ch;
82 int num_channels, c, ret, digits;
83 char *number, *suffix;
90 switch (packet->type) {
91 case SR_DF_FRAME_BEGIN:
92 *out = g_string_new("FRAME-BEGIN\n");
95 *out = g_string_new("FRAME-END\n");
98 analog = packet->payload;
99 num_channels = g_slist_length(analog->meaning->channels);
100 if (!(fdata = g_try_realloc(ctx->fdata,
101 analog->num_samples * num_channels * sizeof(float))))
102 return SR_ERR_MALLOC;
104 if ((ret = sr_analog_to_float(analog, fdata)) != SR_OK)
106 *out = g_string_sized_new(512);
107 if (analog->encoding->is_digits_decimal) {
108 if (ctx->digits == DIGITS_ALL)
109 digits = analog->encoding->digits;
111 digits = analog->spec->spec_digits;
113 /* TODO we don't know how to print by number of bits yet. */
116 gboolean si_friendly = sr_analog_si_prefix_friendly(analog->meaning->unit);
117 sr_analog_unit_to_string(analog, &suffix);
118 for (i = 0; i < analog->num_samples; i++) {
119 for (l = analog->meaning->channels, c = 0; l; l = l->next, c++) {
120 float value = fdata[i * num_channels + c];
121 const char *prefix = "";
123 prefix = sr_analog_si_prefix(&value, &digits);
125 g_string_append_printf(*out, "%s: ", ch->name);
126 number = g_strdup_printf("%.*f", MAX(digits, 0), value);
127 g_string_append(*out, number);
129 g_string_append(*out, " ");
130 g_string_append(*out, prefix);
131 g_string_append(*out, suffix);
132 g_string_append(*out, "\n");
142 static struct sr_option options[] = {
143 { "digits", "Digits", "Digits to show", NULL, NULL },
147 static const struct sr_option *get_options(void)
149 if (!options[0].def) {
150 options[0].def = g_variant_ref_sink(g_variant_new_string("all"));
151 options[0].values = g_slist_append(options[0].values,
152 g_variant_ref_sink(g_variant_new_string("all")));
153 options[0].values = g_slist_append(options[0].values,
154 g_variant_ref_sink(g_variant_new_string("spec")));
160 static int cleanup(struct sr_output *o)
168 g_ptr_array_free(ctx->channellist, 1);
169 g_variant_unref(options[0].def);
170 g_slist_free_full(options[0].values, (GDestroyNotify)g_variant_unref);
178 SR_PRIV struct sr_output_module output_analog = {
181 .desc = "Analog data and types",
184 .options = get_options,