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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2010 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/gnuplot" | |
29 | ||
30 | struct context { | |
31 | unsigned int num_enabled_probes; | |
32 | unsigned int unitsize; | |
33 | char *header; | |
34 | uint8_t *old_sample; | |
35 | }; | |
36 | ||
37 | static const char *gnuplot_header = "\ | |
38 | # Sample data in space-separated columns format usable by gnuplot\n\ | |
39 | #\n\ | |
40 | # Generated by: %s on %s%s\ | |
41 | # Period: %s\n\ | |
42 | #\n\ | |
43 | # Column\tProbe\n\ | |
44 | # -------------------------------------\ | |
45 | ----------------------------------------\n\ | |
46 | # 0\t\tSample counter (for internal gnuplot purposes)\n%s\n"; | |
47 | ||
48 | static const char *gnuplot_header_comment = "\ | |
49 | # Comment: Acquisition with %d/%d probes at %s\n"; | |
50 | ||
51 | static int init(struct sr_output *o) | |
52 | { | |
53 | struct context *ctx; | |
54 | struct sr_probe *probe; | |
55 | GSList *l; | |
56 | GVariant *gvar; | |
57 | uint64_t samplerate; | |
58 | unsigned int i; | |
59 | int num_probes; | |
60 | char *c, *frequency_s; | |
61 | char wbuf[1000], comment[128]; | |
62 | time_t t; | |
63 | ||
64 | if (!o) { | |
65 | sr_err("%s: o was NULL", __func__); | |
66 | return SR_ERR_ARG; | |
67 | } | |
68 | ||
69 | if (!o->sdi) { | |
70 | sr_err("%s: o->sdi was NULL", __func__); | |
71 | return SR_ERR_ARG; | |
72 | } | |
73 | ||
74 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) { | |
75 | sr_err("%s: ctx malloc failed", __func__); | |
76 | return SR_ERR_MALLOC; | |
77 | } | |
78 | ||
79 | o->internal = ctx; | |
80 | ctx->num_enabled_probes = 0; | |
81 | for (l = o->sdi->probes; l; l = l->next) { | |
82 | probe = l->data; | |
83 | if (probe->type != SR_PROBE_LOGIC) | |
84 | continue; | |
85 | if (!probe->enabled) | |
86 | continue; | |
87 | ctx->num_enabled_probes++; | |
88 | } | |
89 | ctx->unitsize = (ctx->num_enabled_probes + 7) / 8; | |
90 | ||
91 | num_probes = g_slist_length(o->sdi->probes); | |
92 | comment[0] = '\0'; | |
93 | samplerate = 0; | |
94 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
95 | &gvar) == SR_OK) { | |
96 | samplerate = g_variant_get_uint64(gvar); | |
97 | g_variant_unref(gvar); | |
98 | if (!(frequency_s = sr_samplerate_string(samplerate))) { | |
99 | sr_err("%s: sr_samplerate_string failed", __func__); | |
100 | g_free(ctx); | |
101 | return SR_ERR; | |
102 | } | |
103 | snprintf(comment, 127, gnuplot_header_comment, | |
104 | ctx->num_enabled_probes, num_probes, frequency_s); | |
105 | g_free(frequency_s); | |
106 | } | |
107 | ||
108 | /* Columns / channels */ | |
109 | wbuf[0] = '\0'; | |
110 | for (i = 0, l = o->sdi->probes; l; l = l->next, i++) { | |
111 | probe = l->data; | |
112 | if (probe->type != SR_PROBE_LOGIC) | |
113 | continue; | |
114 | if (!probe->enabled) | |
115 | continue; | |
116 | c = (char *)&wbuf + strlen((const char *)&wbuf); | |
117 | sprintf(c, "# %d\t\t%s\n", i + 1, probe->name); | |
118 | } | |
119 | ||
120 | if (!(frequency_s = sr_period_string(samplerate))) { | |
121 | sr_err("%s: sr_period_string failed", __func__); | |
122 | g_free(ctx); | |
123 | return SR_ERR; | |
124 | } | |
125 | ||
126 | t = time(NULL); | |
127 | ctx->header = g_strdup_printf(gnuplot_header, PACKAGE_STRING, | |
128 | ctime(&t), comment, frequency_s, (char *)&wbuf); | |
129 | g_free(frequency_s); | |
130 | ||
131 | if (!(ctx->old_sample = g_try_malloc0(ctx->unitsize))) { | |
132 | sr_err("%s: ctx->old_sample malloc failed", __func__); | |
133 | g_free(ctx->header); | |
134 | g_free(ctx); | |
135 | return SR_ERR_MALLOC; | |
136 | } | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static int event(struct sr_output *o, int event_type, uint8_t **data_out, | |
142 | uint64_t *length_out) | |
143 | { | |
144 | if (!o) { | |
145 | sr_err("%s: o was NULL", __func__); | |
146 | return SR_ERR_ARG; | |
147 | } | |
148 | ||
149 | if (!data_out) { | |
150 | sr_err("%s: data_out was NULL", __func__); | |
151 | return SR_ERR_ARG; | |
152 | } | |
153 | ||
154 | if (!length_out) { | |
155 | sr_err("%s: length_out was NULL", __func__); | |
156 | return SR_ERR_ARG; | |
157 | } | |
158 | ||
159 | switch (event_type) { | |
160 | case SR_DF_TRIGGER: | |
161 | /* TODO: Can a trigger mark be in a gnuplot data file? */ | |
162 | break; | |
163 | case SR_DF_END: | |
164 | g_free(o->internal); | |
165 | o->internal = NULL; | |
166 | break; | |
167 | default: | |
168 | sr_err("%s: unsupported event type: %d", __func__, event_type); | |
169 | break; | |
170 | } | |
171 | ||
172 | *data_out = NULL; | |
173 | *length_out = 0; | |
174 | ||
175 | return SR_OK; | |
176 | } | |
177 | ||
178 | static int data(struct sr_output *o, const uint8_t *data_in, | |
179 | uint64_t length_in, uint8_t **data_out, uint64_t *length_out) | |
180 | { | |
181 | struct context *ctx; | |
182 | unsigned int max_linelen, outsize, p, curbit, i; | |
183 | const uint8_t *sample; | |
184 | static uint64_t samplecount = 0; | |
185 | uint8_t *outbuf, *c; | |
186 | ||
187 | if (!o) { | |
188 | sr_err("%s: o was NULL", __func__); | |
189 | return SR_ERR_ARG; | |
190 | } | |
191 | ||
192 | if (!o->internal) { | |
193 | sr_err("%s: o->internal was NULL", __func__); | |
194 | return SR_ERR_ARG; | |
195 | } | |
196 | ||
197 | if (!data_in) { | |
198 | sr_err("%s: data_in was NULL", __func__); | |
199 | return SR_ERR_ARG; | |
200 | } | |
201 | ||
202 | if (!data_out) { | |
203 | sr_err("%s: data_out was NULL", __func__); | |
204 | return SR_ERR_ARG; | |
205 | } | |
206 | ||
207 | if (!length_out) { | |
208 | sr_err("%s: length_out was NULL", __func__); | |
209 | return SR_ERR_ARG; | |
210 | } | |
211 | ||
212 | ctx = o->internal; | |
213 | max_linelen = 16 + ctx->num_enabled_probes * 2; | |
214 | outsize = length_in / ctx->unitsize * max_linelen; | |
215 | if (ctx->header) | |
216 | outsize += strlen(ctx->header); | |
217 | ||
218 | if (!(outbuf = g_try_malloc0(outsize))) { | |
219 | sr_err("%s: outbuf malloc failed", __func__); | |
220 | return SR_ERR_MALLOC; | |
221 | } | |
222 | ||
223 | outbuf[0] = '\0'; | |
224 | if (ctx->header) { | |
225 | /* The header is still here, this must be the first packet. */ | |
226 | strncpy((char *)outbuf, ctx->header, outsize); | |
227 | g_free(ctx->header); | |
228 | ctx->header = NULL; | |
229 | } | |
230 | ||
231 | for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) { | |
232 | ||
233 | sample = data_in + i; | |
234 | ||
235 | /* | |
236 | * Don't output the same samples multiple times. However, make | |
237 | * sure to output at least the first and last sample. | |
238 | */ | |
239 | if (samplecount++ != 0 && | |
240 | !memcmp(sample, ctx->old_sample, ctx->unitsize)) { | |
241 | if (i != (length_in - ctx->unitsize)) | |
242 | continue; | |
243 | } | |
244 | memcpy(ctx->old_sample, sample, ctx->unitsize); | |
245 | ||
246 | /* The first column is a counter (needed for gnuplot). */ | |
247 | c = outbuf + strlen((const char *)outbuf); | |
248 | sprintf((char *)c, "%" PRIu64 "\t", samplecount++); | |
249 | ||
250 | /* The next columns are the values of all channels. */ | |
251 | for (p = 0; p < ctx->num_enabled_probes; p++) { | |
252 | curbit = (sample[p / 8] & ((uint8_t) (1 << (p % 8)))) >> (p % 8); | |
253 | c = outbuf + strlen((const char *)outbuf); | |
254 | sprintf((char *)c, "%d ", curbit); | |
255 | } | |
256 | ||
257 | c = outbuf + strlen((const char *)outbuf); | |
258 | sprintf((char *)c, "\n"); | |
259 | } | |
260 | ||
261 | *data_out = outbuf; | |
262 | *length_out = strlen((const char *)outbuf); | |
263 | ||
264 | return SR_OK; | |
265 | } | |
266 | ||
267 | SR_PRIV struct sr_output_format output_gnuplot = { | |
268 | .id = "gnuplot", | |
269 | .description = "Gnuplot", | |
270 | .df_type = SR_DF_LOGIC, | |
271 | .init = init, | |
272 | .data = data, | |
273 | .event = event, | |
274 | }; |