]>
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 | uint64_t samplecount; | |
33 | GString *header; | |
34 | uint8_t *prevsample; | |
35 | int *channel_index; | |
36 | }; | |
37 | ||
38 | static const char *gnuplot_header = "\ | |
39 | # Sample data in space-separated columns format usable by gnuplot\n\ | |
40 | #\n\ | |
41 | # Generated by: %s on %s%s\ | |
42 | # Period: %s\n\ | |
43 | #\n\ | |
44 | # Column\tChannel\n\ | |
45 | # -------------------------------------\ | |
46 | ----------------------------------------\n\ | |
47 | # 0\t\tSample counter (for internal gnuplot purposes)\n%s\n"; | |
48 | ||
49 | static const char *gnuplot_header_comment = "\ | |
50 | # Comment: Acquisition with %d/%d channels at %s\n"; | |
51 | ||
52 | static int init(struct sr_output *o) | |
53 | { | |
54 | struct context *ctx; | |
55 | struct sr_channel *ch; | |
56 | GSList *l; | |
57 | GVariant *gvar; | |
58 | uint64_t samplerate; | |
59 | unsigned int i, j; | |
60 | int num_channels; | |
61 | char *c, *frequency_s; | |
62 | char wbuf[1000], comment[128]; | |
63 | time_t t; | |
64 | ||
65 | if (!o) | |
66 | return SR_ERR_ARG; | |
67 | ||
68 | if (!o->sdi) | |
69 | return SR_ERR_ARG; | |
70 | ||
71 | if (!(ctx = g_malloc0(sizeof(struct context)))) | |
72 | return SR_ERR_MALLOC; | |
73 | ||
74 | o->internal = ctx; | |
75 | ctx->num_enabled_channels = 0; | |
76 | for (l = o->sdi->channels; l; l = l->next) { | |
77 | ch = l->data; | |
78 | if (ch->type != SR_CHANNEL_LOGIC) | |
79 | continue; | |
80 | if (!ch->enabled) | |
81 | continue; | |
82 | ctx->num_enabled_channels++; | |
83 | } | |
84 | if (ctx->num_enabled_channels <= 0) { | |
85 | sr_err("No logic channel enabled."); | |
86 | return SR_ERR; | |
87 | } | |
88 | ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels); | |
89 | ||
90 | num_channels = g_slist_length(o->sdi->channels); | |
91 | comment[0] = '\0'; | |
92 | samplerate = 0; | |
93 | if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, | |
94 | &gvar) == SR_OK) { | |
95 | samplerate = g_variant_get_uint64(gvar); | |
96 | g_variant_unref(gvar); | |
97 | if (!(frequency_s = sr_samplerate_string(samplerate))) { | |
98 | sr_err("%s: sr_samplerate_string failed", __func__); | |
99 | g_free(ctx); | |
100 | return SR_ERR; | |
101 | } | |
102 | snprintf(comment, 127, gnuplot_header_comment, | |
103 | ctx->num_enabled_channels, num_channels, frequency_s); | |
104 | g_free(frequency_s); | |
105 | } | |
106 | ||
107 | /* Columns / channels */ | |
108 | wbuf[0] = '\0'; | |
109 | for (i = 0, j = 0, l = o->sdi->channels; l; l = l->next, i++) { | |
110 | ch = l->data; | |
111 | if (ch->type != SR_CHANNEL_LOGIC) | |
112 | continue; | |
113 | if (!ch->enabled) | |
114 | continue; | |
115 | c = (char *)&wbuf + strlen((const char *)&wbuf); | |
116 | sprintf(c, "# %d\t\t%s\n", i + 1, ch->name); | |
117 | /* Remember the enabled channel's index while we're at it. */ | |
118 | ctx->channel_index[j++] = i; | |
119 | } | |
120 | ||
121 | if (!(frequency_s = sr_period_string(samplerate))) { | |
122 | sr_err("%s: sr_period_string failed", __func__); | |
123 | g_free(ctx); | |
124 | return SR_ERR; | |
125 | } | |
126 | ||
127 | t = time(NULL); | |
128 | ctx->header = g_string_sized_new(512); | |
129 | g_string_printf(ctx->header, gnuplot_header, PACKAGE_STRING, | |
130 | ctime(&t), comment, frequency_s, (char *)&wbuf); | |
131 | g_free(frequency_s); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static int receive(struct sr_output *o, const struct sr_dev_inst *sdi, | |
137 | const struct sr_datafeed_packet *packet, GString **out) | |
138 | { | |
139 | const struct sr_datafeed_logic *logic; | |
140 | struct context *ctx; | |
141 | const uint8_t *sample; | |
142 | unsigned int curbit, p, idx, i; | |
143 | ||
144 | (void)sdi; | |
145 | ||
146 | *out = NULL; | |
147 | if (!o || !o->internal) | |
148 | return SR_ERR_BUG; | |
149 | ctx = o->internal; | |
150 | ||
151 | if (packet->type != SR_DF_LOGIC) | |
152 | return SR_OK; | |
153 | logic = packet->payload; | |
154 | ||
155 | if (!ctx->prevsample) { | |
156 | /* Can't allocate this until we know the stream's unitsize. */ | |
157 | if (!(ctx->prevsample = g_malloc0(logic->unitsize))) { | |
158 | g_free(ctx); | |
159 | sr_err("%s: ctx->prevsample malloc failed", __func__); | |
160 | return SR_ERR_MALLOC; | |
161 | } | |
162 | } | |
163 | ||
164 | if (ctx->header) { | |
165 | /* The header is still here, this must be the first packet. */ | |
166 | *out = ctx->header; | |
167 | ctx->header = NULL; | |
168 | ctx->samplecount = 0; | |
169 | } else { | |
170 | *out = g_string_sized_new(512); | |
171 | } | |
172 | ||
173 | for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) { | |
174 | sample = logic->data + i; | |
175 | ctx->samplecount++; | |
176 | ||
177 | /* | |
178 | * Don't output the same sample multiple times, but make | |
179 | * sure to output at least the first and last sample. | |
180 | */ | |
181 | if (i > 0 && i < logic->length - logic->unitsize) { | |
182 | if (!memcmp(sample, ctx->prevsample, logic->unitsize)) | |
183 | continue; | |
184 | } | |
185 | memcpy(ctx->prevsample, sample, logic->unitsize); | |
186 | ||
187 | /* The first column is a counter (needed for gnuplot). */ | |
188 | g_string_append_printf(*out, "%" PRIu64 "\t", ctx->samplecount); | |
189 | ||
190 | /* The next columns are the values of all channels. */ | |
191 | for (p = 0; p < ctx->num_enabled_channels; p++) { | |
192 | idx = ctx->channel_index[p]; | |
193 | curbit = (sample[idx / 8] & ((uint8_t) (1 << (idx % 8)))) >> (idx % 8); | |
194 | g_string_append_printf(*out, "%d ", curbit); | |
195 | } | |
196 | g_string_append_printf(*out, "\n"); | |
197 | } | |
198 | ||
199 | return SR_OK; | |
200 | } | |
201 | ||
202 | static int cleanup(struct sr_output *o) | |
203 | { | |
204 | struct context *ctx; | |
205 | ||
206 | if (!o || !o->internal) | |
207 | return SR_ERR_BUG; | |
208 | ctx = o->internal; | |
209 | g_free(ctx->channel_index); | |
210 | g_free(ctx->prevsample); | |
211 | if (ctx->header) | |
212 | g_string_free(ctx->header, TRUE); | |
213 | g_free(ctx); | |
214 | ||
215 | return SR_OK; | |
216 | } | |
217 | ||
218 | SR_PRIV struct sr_output_format output_gnuplot = { | |
219 | .id = "gnuplot", | |
220 | .description = "Gnuplot", | |
221 | .df_type = SR_DF_LOGIC, | |
222 | .init = init, | |
223 | .receive = receive, | |
224 | .cleanup = cleanup, | |
225 | }; |