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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 | /* Message logging helpers with subsystem-specific prefix string. */ | |
29 | #define LOG_PREFIX "output/csv: " | |
30 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
31 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
32 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
33 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
34 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
35 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
36 | ||
37 | struct context { | |
38 | unsigned int num_enabled_probes; | |
39 | unsigned int unitsize; | |
40 | uint64_t samplerate; | |
41 | GString *header; | |
42 | char separator; | |
43 | }; | |
44 | ||
45 | /* | |
46 | * TODO: | |
47 | * - Option to specify delimiter character and/or string. | |
48 | * - Option to (not) print metadata as comments. | |
49 | * - Option to specify the comment character(s), e.g. # or ; or C/C++-style. | |
50 | * - Option to (not) print samplenumber / time as extra column. | |
51 | * - Option to "compress" output (only print changed samples, VCD-like). | |
52 | * - Option to print comma-separated bits, or whole bytes/words (for 8/16 | |
53 | * probe LAs) as ASCII/hex etc. etc. | |
54 | * - Trigger support. | |
55 | */ | |
56 | ||
57 | static int init(struct sr_output *o) | |
58 | { | |
59 | struct context *ctx; | |
60 | struct sr_probe *probe; | |
61 | GSList *l; | |
62 | GVariant *gvar; | |
63 | int num_probes; | |
64 | time_t t; | |
65 | ||
66 | if (!o) { | |
67 | sr_err("%s: o was NULL", __func__); | |
68 | return SR_ERR_ARG; | |
69 | } | |
70 | ||
71 | if (!o->sdi) { | |
72 | sr_err("%s: o->sdi was NULL", __func__); | |
73 | return SR_ERR_ARG; | |
74 | } | |
75 | ||
76 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
77 | sr_err("%s: ctx malloc failed", __func__); | |
78 | return SR_ERR_MALLOC; | |
79 | } | |
80 | ||
81 | o->internal = ctx; | |
82 | ||
83 | /* Get the number of probes, and the unitsize. */ | |
84 | for (l = o->sdi->probes; l; l = l->next) { | |
85 | probe = l->data; | |
86 | if (probe->enabled) | |
87 | ctx->num_enabled_probes++; | |
88 | } | |
89 | ||
90 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
91 | ||
92 | num_probes = g_slist_length(o->sdi->probes); | |
93 | ||
94 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
95 | &gvar) == SR_OK) { | |
96 | ctx->samplerate = g_variant_get_uint64(gvar); | |
97 | g_variant_unref(gvar); | |
98 | } else | |
99 | ctx->samplerate = 0; | |
100 | ||
101 | ctx->separator = ','; | |
102 | ctx->header = g_string_sized_new(512); | |
103 | ||
104 | t = time(NULL); | |
105 | ||
106 | /* Some metadata */ | |
107 | g_string_append_printf(ctx->header, "; CSV, generated by %s on %s", | |
108 | PACKAGE_STRING, ctime(&t)); | |
109 | g_string_append_printf(ctx->header, "; Samplerate: %"PRIu64"\n", | |
110 | ctx->samplerate); | |
111 | ||
112 | /* Columns / channels */ | |
113 | g_string_append_printf(ctx->header, "; Channels (%d/%d): ", | |
114 | ctx->num_enabled_probes, num_probes); | |
115 | for (l = o->sdi->probes; l; l = l->next) { | |
116 | probe = l->data; | |
117 | if (probe->enabled) | |
118 | g_string_append_printf(ctx->header, "%s, ", probe->name); | |
119 | } | |
120 | g_string_append_printf(ctx->header, "\n"); | |
121 | ||
122 | return SR_OK; | |
123 | } | |
124 | ||
125 | static int event(struct sr_output *o, int event_type, uint8_t **data_out, | |
126 | uint64_t *length_out) | |
127 | { | |
128 | struct context *ctx; | |
129 | ||
130 | if (!o) { | |
131 | sr_err("%s: o was NULL", __func__); | |
132 | return SR_ERR_ARG; | |
133 | } | |
134 | ||
135 | if (!(ctx = o->internal)) { | |
136 | sr_err("%s: o->internal was NULL", __func__); | |
137 | return SR_ERR_ARG; | |
138 | } | |
139 | ||
140 | if (!data_out) { | |
141 | sr_err("%s: data_out was NULL", __func__); | |
142 | return SR_ERR_ARG; | |
143 | } | |
144 | ||
145 | switch (event_type) { | |
146 | case SR_DF_TRIGGER: | |
147 | sr_dbg("%s: SR_DF_TRIGGER event", __func__); | |
148 | /* TODO */ | |
149 | *data_out = NULL; | |
150 | *length_out = 0; | |
151 | break; | |
152 | case SR_DF_END: | |
153 | sr_dbg("%s: SR_DF_END event", __func__); | |
154 | /* TODO */ | |
155 | *data_out = NULL; | |
156 | *length_out = 0; | |
157 | g_free(o->internal); | |
158 | o->internal = NULL; | |
159 | break; | |
160 | default: | |
161 | sr_err("%s: unsupported event type: %d", __func__, event_type); | |
162 | *data_out = NULL; | |
163 | *length_out = 0; | |
164 | break; | |
165 | } | |
166 | ||
167 | return SR_OK; | |
168 | } | |
169 | ||
170 | static int data(struct sr_output *o, const uint8_t *data_in, | |
171 | uint64_t length_in, uint8_t **data_out, uint64_t *length_out) | |
172 | { | |
173 | struct context *ctx; | |
174 | GString *outstr; | |
175 | uint64_t sample, i, j; | |
176 | ||
177 | if (!o) { | |
178 | sr_err("%s: o was NULL", __func__); | |
179 | return SR_ERR_ARG; | |
180 | } | |
181 | ||
182 | if (!(ctx = o->internal)) { | |
183 | sr_err("%s: o->internal was NULL", __func__); | |
184 | return SR_ERR_ARG; | |
185 | } | |
186 | ||
187 | if (!data_in) { | |
188 | sr_err("%s: data_in was NULL", __func__); | |
189 | return SR_ERR_ARG; | |
190 | } | |
191 | ||
192 | if (ctx->header) { | |
193 | /* First data packet. */ | |
194 | outstr = ctx->header; | |
195 | ctx->header = NULL; | |
196 | } else { | |
197 | outstr = g_string_sized_new(512); | |
198 | } | |
199 | ||
200 | for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) { | |
201 | memcpy(&sample, data_in + i, ctx->unitsize); | |
202 | for (j = 0; j < ctx->num_enabled_probes; j++) { | |
203 | g_string_append_printf(outstr, "%d%c", | |
204 | (int)((sample & (1 << j)) >> j), | |
205 | ctx->separator); | |
206 | } | |
207 | g_string_append_printf(outstr, "\n"); | |
208 | } | |
209 | ||
210 | *data_out = (uint8_t *)outstr->str; | |
211 | *length_out = outstr->len; | |
212 | g_string_free(outstr, FALSE); | |
213 | ||
214 | return SR_OK; | |
215 | } | |
216 | ||
217 | SR_PRIV struct sr_output_format output_csv = { | |
218 | .id = "csv", | |
219 | .description = "Comma-separated values (CSV)", | |
220 | .df_type = SR_DF_LOGIC, | |
221 | .init = init, | |
222 | .data = data, | |
223 | .event = event, | |
224 | }; |