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40f812f5 MJ |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2019 Marc Jacobi <obiwanjacobi@hotmail.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 <config.h> | |
21 | #include <string.h> | |
22 | #include <libsigrok/libsigrok.h> | |
23 | #include "libsigrok-internal.h" | |
24 | ||
25 | #define LOG_PREFIX "output/wavedrom" | |
26 | ||
dd5735c9 | 27 | struct context { |
40f812f5 | 28 | uint32_t channel_count; |
40f812f5 | 29 | struct sr_channel **channels; |
dd5735c9 | 30 | GString **channel_outputs; /* output strings */ |
40f812f5 MJ |
31 | }; |
32 | ||
dd5735c9 | 33 | /* Converts accumulated output data to a JSON string. */ |
40f812f5 MJ |
34 | static GString *wavedrom_render(const struct context *ctx) |
35 | { | |
dd5735c9 GS |
36 | GString *output; |
37 | size_t ch, i; | |
38 | char last_char, curr_char; | |
40f812f5 | 39 | |
dd5735c9 | 40 | output = g_string_new("{ \"signal\": ["); |
40f812f5 MJ |
41 | for (ch = 0; ch < ctx->channel_count; ch++) { |
42 | if (!ctx->channel_outputs[ch]) | |
43 | continue; | |
44 | ||
dd5735c9 | 45 | /* Channel strip. */ |
40f812f5 MJ |
46 | g_string_append_printf(output, |
47 | "{ \"name\": \"%s\", \"wave\": \"", ctx->channels[ch]->name); | |
48 | ||
dd5735c9 | 49 | last_char = 0; |
40f812f5 | 50 | for (i = 0; i < ctx->channel_outputs[ch]->len; i++) { |
dd5735c9 GS |
51 | curr_char = ctx->channel_outputs[ch]->str[i]; |
52 | /* Data point. */ | |
53 | if (curr_char == last_char) { | |
40f812f5 MJ |
54 | g_string_append_c(output, '.'); |
55 | } else { | |
dd5735c9 GS |
56 | g_string_append_c(output, curr_char); |
57 | last_char = curr_char; | |
40f812f5 MJ |
58 | } |
59 | } | |
60 | if (ch < ctx->channel_count - 1) { | |
61 | g_string_append(output, "\" },"); | |
62 | } else { | |
dd5735c9 | 63 | /* Last channel, no comma. */ |
40f812f5 MJ |
64 | g_string_append(output, "\" }"); |
65 | } | |
66 | } | |
40f812f5 | 67 | g_string_append(output, "], \"config\": { \"skin\": \"narrow\" }}"); |
dd5735c9 | 68 | |
40f812f5 MJ |
69 | return output; |
70 | } | |
71 | ||
7a0d1bdc GS |
72 | static void process_logic(const struct context *ctx, |
73 | const struct sr_datafeed_logic *logic) | |
74 | { | |
75 | size_t sample_count, ch, i; | |
76 | uint8_t *sample; | |
77 | ||
78 | sample_count = logic->length / logic->unitsize; | |
79 | ||
80 | /* | |
81 | * Extract the logic bits for each channel and store them | |
82 | * as wavedrom letters (1/0) in each channel's text string. | |
83 | */ | |
84 | for (ch = 0; ch < ctx->channel_count; ch++) { | |
85 | if (ctx->channels[ch]) { | |
86 | for (i = 0; i < sample_count; i++) { | |
87 | sample = logic->data + i * logic->unitsize; | |
88 | ||
89 | if (ctx->channel_outputs[ch]) { | |
90 | g_string_append_c(ctx->channel_outputs[ch], | |
91 | sample[ch / 8] & (1 << (ch % 8)) ? '1' : '0'); | |
92 | } | |
93 | } | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | static int receive(const struct sr_output *o, | |
99 | const struct sr_datafeed_packet *packet, GString **out) | |
100 | { | |
101 | struct context *ctx; | |
102 | ||
103 | *out = NULL; | |
104 | ||
105 | if (!o || !o->sdi || !o->priv) | |
106 | return SR_ERR_ARG; | |
107 | ||
108 | ctx = o->priv; | |
109 | ||
110 | switch (packet->type) { | |
111 | case SR_DF_LOGIC: | |
112 | process_logic(ctx, packet->payload); | |
113 | break; | |
114 | case SR_DF_END: | |
115 | *out = wavedrom_render(ctx); | |
116 | break; | |
117 | } | |
118 | ||
119 | return SR_OK; | |
120 | } | |
121 | ||
40f812f5 MJ |
122 | static int init(struct sr_output *o, GHashTable *options) |
123 | { | |
124 | struct context *ctx; | |
125 | struct sr_channel *channel; | |
126 | GSList *l; | |
dd5735c9 | 127 | size_t i; |
40f812f5 MJ |
128 | |
129 | (void)options; | |
130 | ||
131 | if (!o || !o->sdi) | |
132 | return SR_ERR_ARG; | |
133 | ||
dd5735c9 | 134 | o->priv = ctx = g_malloc0(sizeof(*ctx)); |
40f812f5 MJ |
135 | |
136 | ctx->channel_count = g_slist_length(o->sdi->channels); | |
dd5735c9 GS |
137 | ctx->channels = g_malloc0( |
138 | sizeof(ctx->channels[0]) * ctx->channel_count); | |
139 | ctx->channel_outputs = g_malloc0( | |
140 | sizeof(ctx->channel_outputs[0]) * ctx->channel_count); | |
40f812f5 MJ |
141 | |
142 | for (i = 0, l = o->sdi->channels; l; l = l->next, i++) { | |
143 | channel = l->data; | |
dd5735c9 | 144 | if (channel->enabled && channel->type == SR_CHANNEL_LOGIC) { |
40f812f5 MJ |
145 | ctx->channels[i] = channel; |
146 | ctx->channel_outputs[i] = g_string_new(NULL); | |
40f812f5 MJ |
147 | } |
148 | } | |
149 | ||
150 | return SR_OK; | |
151 | } | |
152 | ||
153 | static int cleanup(struct sr_output *o) | |
154 | { | |
155 | struct context *ctx; | |
dd5735c9 | 156 | GString *s; |
40f812f5 MJ |
157 | |
158 | if (!o) | |
159 | return SR_ERR_ARG; | |
160 | ||
161 | ctx = o->priv; | |
162 | o->priv = NULL; | |
163 | ||
164 | if (ctx) { | |
dd5735c9 GS |
165 | while (--ctx->channel_count) { |
166 | s = ctx->channel_outputs[ctx->channel_count]; | |
167 | if (s) | |
168 | g_string_free(s, TRUE); | |
40f812f5 MJ |
169 | } |
170 | g_free(ctx->channel_outputs); | |
171 | g_free(ctx->channels); | |
172 | g_free(ctx); | |
173 | } | |
174 | ||
175 | return SR_OK; | |
176 | } | |
177 | ||
40f812f5 MJ |
178 | SR_PRIV struct sr_output_module output_wavedrom = { |
179 | .id = "wavedrom", | |
dd5735c9 | 180 | .name = "WaveDrom", |
40f812f5 MJ |
181 | .desc = "WaveDrom.com file format", |
182 | .exts = (const char *[]){"wavedrom", "json", NULL}, | |
183 | .flags = 0, | |
184 | .options = NULL, | |
185 | .init = init, | |
186 | .receive = receive, | |
187 | .cleanup = cleanup, | |
188 | }; |