]>
Commit | Line | Data |
---|---|---|
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_channels; | |
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\tChannel\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 channels at %s\n"; | |
50 | ||
51 | static int init(struct sr_output *o) | |
52 | { | |
53 | struct context *ctx; | |
54 | struct sr_channel *ch; | |
55 | GSList *l; | |
56 | GVariant *gvar; | |
57 | uint64_t samplerate; | |
58 | unsigned int i; | |
59 | int num_channels; | |
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_channels = 0; | |
81 | for (l = o->sdi->channels; l; l = l->next) { | |
82 | ch = l->data; | |
83 | if (ch->type != SR_CHANNEL_LOGIC) | |
84 | continue; | |
85 | if (!ch->enabled) | |
86 | continue; | |
87 | ctx->num_enabled_channels++; | |
88 | } | |
89 | if (ctx->num_enabled_channels <= 0) { | |
90 | sr_err("%s: no logic channel enabled", __func__); | |
91 | return SR_ERR; | |
92 | } | |
93 | ||
94 | ctx->unitsize = (ctx->num_enabled_channels + 7) / 8; | |
95 | ||
96 | num_channels = g_slist_length(o->sdi->channels); | |
97 | comment[0] = '\0'; | |
98 | samplerate = 0; | |
99 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
100 | &gvar) == SR_OK) { | |
101 | samplerate = g_variant_get_uint64(gvar); | |
102 | g_variant_unref(gvar); | |
103 | if (!(frequency_s = sr_samplerate_string(samplerate))) { | |
104 | sr_err("%s: sr_samplerate_string failed", __func__); | |
105 | g_free(ctx); | |
106 | return SR_ERR; | |
107 | } | |
108 | snprintf(comment, 127, gnuplot_header_comment, | |
109 | ctx->num_enabled_channels, num_channels, frequency_s); | |
110 | g_free(frequency_s); | |
111 | } | |
112 | ||
113 | /* Columns / channels */ | |
114 | wbuf[0] = '\0'; | |
115 | for (i = 0, l = o->sdi->channels; l; l = l->next, i++) { | |
116 | ch = l->data; | |
117 | if (ch->type != SR_CHANNEL_LOGIC) | |
118 | continue; | |
119 | if (!ch->enabled) | |
120 | continue; | |
121 | c = (char *)&wbuf + strlen((const char *)&wbuf); | |
122 | sprintf(c, "# %d\t\t%s\n", i + 1, ch->name); | |
123 | } | |
124 | ||
125 | if (!(frequency_s = sr_period_string(samplerate))) { | |
126 | sr_err("%s: sr_period_string failed", __func__); | |
127 | g_free(ctx); | |
128 | return SR_ERR; | |
129 | } | |
130 | ||
131 | t = time(NULL); | |
132 | ctx->header = g_strdup_printf(gnuplot_header, PACKAGE_STRING, | |
133 | ctime(&t), comment, frequency_s, (char *)&wbuf); | |
134 | g_free(frequency_s); | |
135 | ||
136 | if (!(ctx->old_sample = g_try_malloc0(ctx->unitsize))) { | |
137 | sr_err("%s: ctx->old_sample malloc failed", __func__); | |
138 | g_free(ctx->header); | |
139 | g_free(ctx); | |
140 | return SR_ERR_MALLOC; | |
141 | } | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int event(struct sr_output *o, int event_type, uint8_t **data_out, | |
147 | uint64_t *length_out) | |
148 | { | |
149 | if (!o) { | |
150 | sr_err("%s: o was NULL", __func__); | |
151 | return SR_ERR_ARG; | |
152 | } | |
153 | ||
154 | if (!data_out) { | |
155 | sr_err("%s: data_out was NULL", __func__); | |
156 | return SR_ERR_ARG; | |
157 | } | |
158 | ||
159 | if (!length_out) { | |
160 | sr_err("%s: length_out was NULL", __func__); | |
161 | return SR_ERR_ARG; | |
162 | } | |
163 | ||
164 | switch (event_type) { | |
165 | case SR_DF_TRIGGER: | |
166 | /* TODO: Can a trigger mark be in a gnuplot data file? */ | |
167 | break; | |
168 | case SR_DF_END: | |
169 | g_free(o->internal); | |
170 | o->internal = NULL; | |
171 | break; | |
172 | default: | |
173 | sr_err("%s: unsupported event type: %d", __func__, event_type); | |
174 | break; | |
175 | } | |
176 | ||
177 | *data_out = NULL; | |
178 | *length_out = 0; | |
179 | ||
180 | return SR_OK; | |
181 | } | |
182 | ||
183 | static int data(struct sr_output *o, const uint8_t *data_in, | |
184 | uint64_t length_in, uint8_t **data_out, uint64_t *length_out) | |
185 | { | |
186 | struct context *ctx; | |
187 | unsigned int max_linelen, outsize, p, curbit, i; | |
188 | const uint8_t *sample; | |
189 | static uint64_t samplecount = 0; | |
190 | uint8_t *outbuf, *c; | |
191 | ||
192 | if (!o) { | |
193 | sr_err("%s: o was NULL", __func__); | |
194 | return SR_ERR_ARG; | |
195 | } | |
196 | ||
197 | if (!o->internal) { | |
198 | sr_err("%s: o->internal was NULL", __func__); | |
199 | return SR_ERR_ARG; | |
200 | } | |
201 | ||
202 | if (!data_in) { | |
203 | sr_err("%s: data_in was NULL", __func__); | |
204 | return SR_ERR_ARG; | |
205 | } | |
206 | ||
207 | if (!data_out) { | |
208 | sr_err("%s: data_out was NULL", __func__); | |
209 | return SR_ERR_ARG; | |
210 | } | |
211 | ||
212 | if (!length_out) { | |
213 | sr_err("%s: length_out was NULL", __func__); | |
214 | return SR_ERR_ARG; | |
215 | } | |
216 | ||
217 | ctx = o->internal; | |
218 | max_linelen = 16 + ctx->num_enabled_channels * 2; | |
219 | outsize = length_in / ctx->unitsize * max_linelen; | |
220 | if (ctx->header) | |
221 | outsize += strlen(ctx->header); | |
222 | ||
223 | if (!(outbuf = g_try_malloc0(outsize))) { | |
224 | sr_err("%s: outbuf malloc failed", __func__); | |
225 | return SR_ERR_MALLOC; | |
226 | } | |
227 | ||
228 | outbuf[0] = '\0'; | |
229 | if (ctx->header) { | |
230 | /* The header is still here, this must be the first packet. */ | |
231 | strncpy((char *)outbuf, ctx->header, outsize); | |
232 | g_free(ctx->header); | |
233 | ctx->header = NULL; | |
234 | } | |
235 | ||
236 | for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) { | |
237 | ||
238 | sample = data_in + i; | |
239 | ||
240 | /* | |
241 | * Don't output the same samples multiple times. However, make | |
242 | * sure to output at least the first and last sample. | |
243 | */ | |
244 | if (samplecount++ != 0 && | |
245 | !memcmp(sample, ctx->old_sample, ctx->unitsize)) { | |
246 | if (i != (length_in - ctx->unitsize)) | |
247 | continue; | |
248 | } | |
249 | memcpy(ctx->old_sample, sample, ctx->unitsize); | |
250 | ||
251 | /* The first column is a counter (needed for gnuplot). */ | |
252 | c = outbuf + strlen((const char *)outbuf); | |
253 | sprintf((char *)c, "%" PRIu64 "\t", samplecount++); | |
254 | ||
255 | /* The next columns are the values of all channels. */ | |
256 | for (p = 0; p < ctx->num_enabled_channels; p++) { | |
257 | curbit = (sample[p / 8] & ((uint8_t) (1 << (p % 8)))) >> (p % 8); | |
258 | c = outbuf + strlen((const char *)outbuf); | |
259 | sprintf((char *)c, "%d ", curbit); | |
260 | } | |
261 | ||
262 | c = outbuf + strlen((const char *)outbuf); | |
263 | sprintf((char *)c, "\n"); | |
264 | } | |
265 | ||
266 | *data_out = outbuf; | |
267 | *length_out = strlen((const char *)outbuf); | |
268 | ||
269 | return SR_OK; | |
270 | } | |
271 | ||
272 | SR_PRIV struct sr_output_format output_gnuplot = { | |
273 | .id = "gnuplot", | |
274 | .description = "Gnuplot", | |
275 | .df_type = SR_DF_LOGIC, | |
276 | .init = init, | |
277 | .data = data, | |
278 | .event = event, | |
279 | }; |