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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 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 <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <math.h> | |
24 | #include <glib.h> | |
25 | #include <libsigrok/libsigrok.h> | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | #define LOG_PREFIX "output/analog" | |
29 | ||
30 | struct context { | |
31 | int num_enabled_channels; | |
32 | GPtrArray *channellist; | |
33 | int digits; | |
34 | float *fdata; | |
35 | }; | |
36 | ||
37 | enum { | |
38 | DIGITS_ALL, | |
39 | DIGITS_SPEC, | |
40 | }; | |
41 | ||
42 | static int init(struct sr_output *o, GHashTable *options) | |
43 | { | |
44 | struct context *ctx; | |
45 | struct sr_channel *ch; | |
46 | GSList *l; | |
47 | const char *s; | |
48 | ||
49 | if (!o || !o->sdi) | |
50 | return SR_ERR_ARG; | |
51 | ||
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; | |
56 | else | |
57 | ctx->digits = DIGITS_SPEC; | |
58 | ||
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) { | |
62 | ch = l->data; | |
63 | if (!ch || !ch->enabled) | |
64 | continue; | |
65 | g_ptr_array_add(ctx->channellist, ch->name); | |
66 | ctx->num_enabled_channels++; | |
67 | } | |
68 | ctx->fdata = NULL; | |
69 | ||
70 | return SR_OK; | |
71 | } | |
72 | ||
73 | static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet, | |
74 | GString **out) | |
75 | { | |
76 | struct context *ctx; | |
77 | const struct sr_datafeed_analog *analog; | |
78 | struct sr_channel *ch; | |
79 | GSList *l; | |
80 | float *fdata; | |
81 | unsigned int i; | |
82 | int num_channels, c, ret, digits; | |
83 | char *number, *suffix; | |
84 | ||
85 | *out = NULL; | |
86 | if (!o || !o->sdi) | |
87 | return SR_ERR_ARG; | |
88 | ctx = o->priv; | |
89 | ||
90 | switch (packet->type) { | |
91 | case SR_DF_FRAME_BEGIN: | |
92 | *out = g_string_new("FRAME-BEGIN\n"); | |
93 | break; | |
94 | case SR_DF_FRAME_END: | |
95 | *out = g_string_new("FRAME-END\n"); | |
96 | break; | |
97 | case SR_DF_ANALOG: | |
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; | |
103 | ctx->fdata = fdata; | |
104 | if ((ret = sr_analog_to_float(analog, fdata)) != SR_OK) | |
105 | return ret; | |
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; | |
110 | else | |
111 | digits = analog->spec->spec_digits; | |
112 | } else { | |
113 | /* TODO we don't know how to print by number of bits yet. */ | |
114 | digits = 6; | |
115 | } | |
116 | sr_analog_unit_to_string(analog, &suffix); | |
117 | for (i = 0; i < analog->num_samples; i++) { | |
118 | for (l = analog->meaning->channels, c = 0; l; l = l->next, c++) { | |
119 | float value = fdata[i * num_channels + c]; | |
120 | const char *prefix = sr_analog_si_prefix(&value, &digits); | |
121 | ch = l->data; | |
122 | g_string_append_printf(*out, "%s: ", ch->name); | |
123 | number = g_strdup_printf("%.*f", MAX(digits, 0), value); | |
124 | g_string_append(*out, number); | |
125 | g_free(number); | |
126 | g_string_append(*out, " "); | |
127 | g_string_append(*out, prefix); | |
128 | g_string_append(*out, suffix); | |
129 | g_string_append(*out, "\n"); | |
130 | } | |
131 | } | |
132 | g_free(suffix); | |
133 | break; | |
134 | } | |
135 | ||
136 | return SR_OK; | |
137 | } | |
138 | ||
139 | static struct sr_option options[] = { | |
140 | { "digits", "Digits", "Digits to show", NULL, NULL }, | |
141 | ALL_ZERO | |
142 | }; | |
143 | ||
144 | static const struct sr_option *get_options(void) | |
145 | { | |
146 | if (!options[0].def) { | |
147 | options[0].def = g_variant_ref_sink(g_variant_new_string("all")); | |
148 | options[0].values = g_slist_append(options[0].values, | |
149 | g_variant_ref_sink(g_variant_new_string("all"))); | |
150 | options[0].values = g_slist_append(options[0].values, | |
151 | g_variant_ref_sink(g_variant_new_string("spec"))); | |
152 | } | |
153 | ||
154 | return options; | |
155 | } | |
156 | ||
157 | static int cleanup(struct sr_output *o) | |
158 | { | |
159 | struct context *ctx; | |
160 | ||
161 | if (!o || !o->sdi) | |
162 | return SR_ERR_ARG; | |
163 | ctx = o->priv; | |
164 | ||
165 | g_ptr_array_free(ctx->channellist, 1); | |
166 | g_variant_unref(options[0].def); | |
167 | g_slist_free_full(options[0].values, (GDestroyNotify)g_variant_unref); | |
168 | g_free(ctx->fdata); | |
169 | g_free(ctx); | |
170 | o->priv = NULL; | |
171 | ||
172 | return SR_OK; | |
173 | } | |
174 | ||
175 | SR_PRIV struct sr_output_module output_analog = { | |
176 | .id = "analog", | |
177 | .name = "Analog", | |
178 | .desc = "Analog data and types", | |
179 | .exts = NULL, | |
180 | .flags = 0, | |
181 | .options = get_options, | |
182 | .init = init, | |
183 | .receive = receive, | |
184 | .cleanup = cleanup | |
185 | }; |