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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
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 3 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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <glib.h> | |
23 | #include "config.h" | |
24 | #include "libsigrok.h" | |
25 | #include "libsigrok-internal.h" | |
26 | ||
27 | struct context { | |
28 | unsigned int num_enabled_probes; | |
29 | GPtrArray *probelist; | |
30 | }; | |
31 | ||
32 | static int init(struct sr_output *o) | |
33 | { | |
34 | struct context *ctx; | |
35 | struct sr_probe *probe; | |
36 | GSList *l; | |
37 | ||
38 | if (!o) | |
39 | return SR_ERR_ARG; | |
40 | ||
41 | if (!o->sdi) | |
42 | return SR_ERR_ARG; | |
43 | ||
44 | if (!o->sdi->driver) | |
45 | return SR_ERR_ARG; | |
46 | ||
47 | if (!(ctx = g_try_malloc0(sizeof(struct context)))) | |
48 | return SR_ERR_MALLOC; | |
49 | ||
50 | o->internal = ctx; | |
51 | ||
52 | /* Get the number of probes and their names. */ | |
53 | ctx->probelist = g_ptr_array_new(); | |
54 | for (l = o->sdi->probes; l; l = l->next) { | |
55 | probe = l->data; | |
56 | if (!probe || !probe->enabled) | |
57 | continue; | |
58 | g_ptr_array_add(ctx->probelist, probe->name); | |
59 | ctx->num_enabled_probes++; | |
60 | } | |
61 | ||
62 | return SR_OK; | |
63 | } | |
64 | ||
65 | static int event(struct sr_output *o, int event_type, uint8_t **data_out, | |
66 | uint64_t *length_out) | |
67 | { | |
68 | struct context *ctx; | |
69 | ||
70 | if (!o) | |
71 | return SR_ERR_ARG; | |
72 | ||
73 | if (!(ctx = o->internal)) | |
74 | return SR_ERR_ARG; | |
75 | ||
76 | if (!data_out) | |
77 | return SR_ERR_ARG; | |
78 | ||
79 | switch (event_type) { | |
80 | case SR_DF_FRAME_BEGIN: | |
81 | *data_out = (uint8_t *)g_strdup("FRAME-BEGIN\n"); | |
82 | *length_out = 12; | |
83 | break; | |
84 | case SR_DF_FRAME_END: | |
85 | *data_out = (uint8_t *)g_strdup("FRAME-END\n"); | |
86 | *length_out = 10; | |
87 | break; | |
88 | case SR_DF_END: | |
89 | *data_out = NULL; | |
90 | *length_out = 0; | |
91 | g_ptr_array_free(ctx->probelist, TRUE); | |
92 | g_free(o->internal); | |
93 | o->internal = NULL; | |
94 | break; | |
95 | default: | |
96 | /* Ignore everything else. */ | |
97 | *data_out = NULL; | |
98 | *length_out = 0; | |
99 | break; | |
100 | } | |
101 | ||
102 | return SR_OK; | |
103 | } | |
104 | ||
105 | static int data(struct sr_output *o, const uint8_t *data_in, | |
106 | uint64_t length_in, uint8_t **data_out, uint64_t *length_out) | |
107 | { | |
108 | struct context *ctx; | |
109 | GString *outstr; | |
110 | float *fdata; | |
111 | uint64_t max, i; | |
112 | unsigned int j; | |
113 | ||
114 | if (!o) | |
115 | return SR_ERR_ARG; | |
116 | ||
117 | if (!(ctx = o->internal)) | |
118 | return SR_ERR_ARG; | |
119 | ||
120 | if (!data_in || !data_out) | |
121 | return SR_ERR_ARG; | |
122 | ||
123 | outstr = g_string_sized_new(512); | |
124 | ||
125 | fdata = (float *)data_in; | |
126 | max = length_in / sizeof(float); | |
127 | for (i = 0; i < max;) { | |
128 | for (j = 0; j < ctx->num_enabled_probes; j++) { | |
129 | g_string_append_printf(outstr, "%s: %.12f\n", | |
130 | (char *)g_ptr_array_index(ctx->probelist, j), | |
131 | fdata[i++]); | |
132 | } | |
133 | } | |
134 | ||
135 | *data_out = (uint8_t *)outstr->str; | |
136 | *length_out = outstr->len; | |
137 | g_string_free(outstr, FALSE); | |
138 | ||
139 | return SR_OK; | |
140 | } | |
141 | ||
142 | SR_PRIV struct sr_output_format output_float = { | |
143 | .id = "float", | |
144 | .description = "Floating point", | |
145 | .df_type = SR_DF_ANALOG, | |
146 | .init = init, | |
147 | .data = data, | |
148 | .event = event, | |
149 | }; |