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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <glib.h> | |
24 | #include "config.h" /* Needed for PACKAGE_STRING and others. */ | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | #define LOG_PREFIX "output/csv" | |
29 | ||
30 | struct context { | |
31 | unsigned int num_enabled_channels; | |
32 | uint64_t samplerate; | |
33 | GString *header; | |
34 | char separator; | |
35 | int *channel_index; | |
36 | }; | |
37 | ||
38 | /* | |
39 | * TODO: | |
40 | * - Option to specify delimiter character and/or string. | |
41 | * - Option to (not) print metadata as comments. | |
42 | * - Option to specify the comment character(s), e.g. # or ; or C/C++-style. | |
43 | * - Option to (not) print samplenumber / time as extra column. | |
44 | * - Option to "compress" output (only print changed samples, VCD-like). | |
45 | * - Option to print comma-separated bits, or whole bytes/words (for 8/16 | |
46 | * channel LAs) as ASCII/hex etc. etc. | |
47 | * - Trigger support. | |
48 | */ | |
49 | ||
50 | static int init(struct sr_output *o) | |
51 | { | |
52 | struct context *ctx; | |
53 | struct sr_channel *ch; | |
54 | GSList *l; | |
55 | GVariant *gvar; | |
56 | int num_channels, i, j; | |
57 | time_t t; | |
58 | ||
59 | if (!o) | |
60 | return SR_ERR_ARG; | |
61 | ||
62 | if (!o->sdi) | |
63 | return SR_ERR_ARG; | |
64 | ||
65 | ctx = g_malloc0(sizeof(struct context)); | |
66 | o->internal = ctx; | |
67 | ||
68 | /* Get the number of channels, and the unitsize. */ | |
69 | for (l = o->sdi->channels; l; l = l->next) { | |
70 | ch = l->data; | |
71 | if (ch->type != SR_CHANNEL_LOGIC) | |
72 | continue; | |
73 | if (!ch->enabled) | |
74 | continue; | |
75 | ctx->num_enabled_channels++; | |
76 | } | |
77 | ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels); | |
78 | ||
79 | num_channels = g_slist_length(o->sdi->channels); | |
80 | ||
81 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
82 | &gvar) == SR_OK) { | |
83 | ctx->samplerate = g_variant_get_uint64(gvar); | |
84 | g_variant_unref(gvar); | |
85 | } else | |
86 | ctx->samplerate = 0; | |
87 | ||
88 | ctx->separator = ','; | |
89 | ctx->header = g_string_sized_new(512); | |
90 | ||
91 | t = time(NULL); | |
92 | ||
93 | /* Some metadata */ | |
94 | g_string_append_printf(ctx->header, "; CSV, generated by %s on %s", | |
95 | PACKAGE_STRING, ctime(&t)); | |
96 | g_string_append_printf(ctx->header, "; Samplerate: %"PRIu64"\n", | |
97 | ctx->samplerate); | |
98 | ||
99 | /* Columns / channels */ | |
100 | g_string_append_printf(ctx->header, "; Channels (%d/%d):", | |
101 | ctx->num_enabled_channels, num_channels); | |
102 | for (i = 0, j = 0, l = o->sdi->channels; l; l = l->next, i++) { | |
103 | ch = l->data; | |
104 | if (ch->type != SR_CHANNEL_LOGIC) | |
105 | continue; | |
106 | if (!ch->enabled) | |
107 | continue; | |
108 | g_string_append_printf(ctx->header, " %s,", ch->name); | |
109 | /* Remember the enabled channel's index while we're at it. */ | |
110 | ctx->channel_index[j++] = i; | |
111 | } | |
112 | if (o->sdi->channels) | |
113 | /* Drop last separator. */ | |
114 | g_string_truncate(ctx->header, ctx->header->len - 1); | |
115 | g_string_append_printf(ctx->header, "\n"); | |
116 | ||
117 | return SR_OK; | |
118 | } | |
119 | ||
120 | static int receive(struct sr_output *o, const struct sr_dev_inst *sdi, | |
121 | const struct sr_datafeed_packet *packet, GString **out) | |
122 | { | |
123 | const struct sr_datafeed_logic *logic; | |
124 | struct context *ctx; | |
125 | int idx; | |
126 | uint64_t i, j; | |
127 | gchar *p, c; | |
128 | ||
129 | (void)sdi; | |
130 | ||
131 | *out = NULL; | |
132 | if (!o || !o->sdi) | |
133 | return SR_ERR_ARG; | |
134 | if (!(ctx = o->internal)) | |
135 | return SR_ERR_ARG; | |
136 | ||
137 | switch (packet->type) { | |
138 | case SR_DF_LOGIC: | |
139 | logic = packet->payload; | |
140 | if (ctx->header) { | |
141 | /* | |
142 | * First data packet: prime the output with the | |
143 | * previously prepared header. | |
144 | */ | |
145 | *out = ctx->header; | |
146 | ctx->header = NULL; | |
147 | } else { | |
148 | *out = g_string_sized_new(512); | |
149 | } | |
150 | ||
151 | for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) { | |
152 | for (j = 0; j < ctx->num_enabled_channels; j++) { | |
153 | idx = ctx->channel_index[j]; | |
154 | p = logic->data + i + idx / 8; | |
155 | c = *p & (1 << (idx % 8)); | |
156 | g_string_append_c(*out, c ? '1' : '0'); | |
157 | g_string_append_c(*out, ctx->separator); | |
158 | } | |
159 | if (j) { | |
160 | /* Drop last separator. */ | |
161 | g_string_truncate(*out, (*out)->len - 1); | |
162 | } | |
163 | g_string_append_printf(*out, "\n"); | |
164 | } | |
165 | break; | |
166 | } | |
167 | ||
168 | return SR_OK; | |
169 | } | |
170 | ||
171 | static int cleanup(struct sr_output *o) | |
172 | { | |
173 | struct context *ctx; | |
174 | ||
175 | if (!o || !o->sdi) | |
176 | return SR_ERR_ARG; | |
177 | ||
178 | if (o->internal) { | |
179 | ctx = o->internal; | |
180 | if (ctx->header) | |
181 | g_string_free(ctx->header, TRUE); | |
182 | g_free(ctx->channel_index); | |
183 | g_free(o->internal); | |
184 | o->internal = NULL; | |
185 | } | |
186 | ||
187 | return SR_OK; | |
188 | } | |
189 | ||
190 | SR_PRIV struct sr_output_format output_csv = { | |
191 | .id = "csv", | |
192 | .description = "Comma-separated values (CSV)", | |
193 | .init = init, | |
194 | .receive = receive, | |
195 | .cleanup = cleanup, | |
196 | }; |