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Commit | Line | Data |
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99eaa206 | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
99eaa206 | 3 | * |
0157808d | 4 | * Copyright (C) 2012 Petteri Aimonen <jpa@sr.mail.kapsi.fi> |
99eaa206 PA |
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 | ||
0157808d PA |
20 | /* The VCD input module has the following options: |
21 | * | |
22 | * numprobes: Maximum number of probes to use. The probes are | |
23 | * detected in the same order as they are listed | |
24 | * in the $var sections of the VCD file. | |
25 | * | |
26 | * skip: Allows skipping until given timestamp in the file. | |
27 | * This can speed up analyzing of long captures. | |
28 | * | |
29 | * Value < 0: Skip until first timestamp listed in | |
30 | * the file. (default) | |
31 | * | |
32 | * Value = 0: Do not skip, instead generate samples | |
33 | * beginning from timestamp 0. | |
34 | * | |
35 | * Value > 0: Start at the given timestamp. | |
36 | * | |
37 | * downsample: Divide the samplerate by the given factor. | |
38 | * This can speed up analyzing of long captures. | |
39 | * | |
6b7ace48 PA |
40 | * compress: Compress idle periods longer than this value. |
41 | * This can speed up analyzing of long captures. | |
42 | * Default 0 = don't compress. | |
43 | * | |
0157808d PA |
44 | * Based on Verilog standard IEEE Std 1364-2001 Version C |
45 | * | |
46 | * Supported features: | |
47 | * - $var with 'wire' and 'reg' types of scalar variables | |
48 | * - $timescale definition for samplerate | |
49 | * - multiple character variable identifiers | |
50 | * | |
51 | * Most important unsupported features: | |
52 | * - vector variables (bit vectors etc.) | |
53 | * - analog, integer and real number variables | |
54 | * - $dumpvars initial value declaration | |
8be87469 | 55 | * - $scope namespaces |
e4c8a4d7 | 56 | * - more than 64 probes |
0157808d PA |
57 | */ |
58 | ||
99eaa206 PA |
59 | #include <stdlib.h> |
60 | #include <glib.h> | |
61 | #include <stdio.h> | |
61a429c9 | 62 | #include <string.h> |
99eaa206 PA |
63 | #include "libsigrok.h" |
64 | #include "libsigrok-internal.h" | |
65 | ||
29a27196 UH |
66 | /* Message logging helpers with subsystem-specific prefix string. */ |
67 | #define LOG_PREFIX "input/vcd: " | |
68 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
69 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
70 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
71 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
72 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
73 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
99eaa206 PA |
74 | |
75 | #define DEFAULT_NUM_PROBES 8 | |
e4c8a4d7 BV |
76 | #define CHUNKSIZE 1024 |
77 | ||
78 | struct context { | |
79 | uint64_t samplerate; | |
80 | int maxprobes; | |
81 | int probecount; | |
82 | int downsample; | |
83 | unsigned compress; | |
84 | int64_t skip; | |
85 | GSList *probes; | |
86 | }; | |
87 | ||
88 | struct probe { | |
89 | gchar *name; | |
90 | gchar *identifier; | |
91 | }; | |
92 | ||
99eaa206 PA |
93 | |
94 | /* Read until specific type of character occurs in file. | |
95 | * Skip input if dest is NULL. | |
96 | * Modes: | |
97 | * 'W' read until whitespace | |
98 | * 'N' read until non-whitespace, and ungetc() the character | |
99 | * '$' read until $end | |
100 | */ | |
101 | static gboolean read_until(FILE *file, GString *dest, char mode) | |
102 | { | |
103 | char prev[4] = ""; | |
8be87469 | 104 | long startpos = ftell(file); |
e4c8a4d7 | 105 | for(;;) { |
99eaa206 PA |
106 | int c = fgetc(file); |
107 | ||
e4c8a4d7 | 108 | if (c == EOF) { |
8be87469 PA |
109 | if (mode == '$') |
110 | sr_err("Unexpected EOF, read started at %ld.", startpos); | |
99eaa206 PA |
111 | return FALSE; |
112 | } | |
113 | ||
114 | if (mode == 'W' && g_ascii_isspace(c)) | |
115 | return TRUE; | |
116 | ||
e4c8a4d7 | 117 | if (mode == 'N' && !g_ascii_isspace(c)) { |
99eaa206 PA |
118 | ungetc(c, file); |
119 | return TRUE; | |
120 | } | |
121 | ||
e4c8a4d7 | 122 | if (mode == '$') { |
99eaa206 | 123 | prev[0] = prev[1]; prev[1] = prev[2]; prev[2] = prev[3]; prev[3] = c; |
e4c8a4d7 | 124 | if (prev[0] == '$' && prev[1] == 'e' && prev[2] == 'n' && prev[3] == 'd') { |
99eaa206 PA |
125 | if (dest != NULL) |
126 | g_string_truncate(dest, dest->len - 3); | |
127 | ||
128 | return TRUE; | |
129 | } | |
130 | } | |
131 | ||
132 | if (dest != NULL) | |
133 | g_string_append_c(dest, c); | |
134 | } | |
135 | } | |
136 | ||
e4c8a4d7 BV |
137 | /* |
138 | * Reads a single VCD section from input file and parses it to structure. | |
99eaa206 PA |
139 | * e.g. $timescale 1ps $end => "timescale" "1ps" |
140 | */ | |
141 | static gboolean parse_section(FILE *file, gchar **name, gchar **contents) | |
142 | { | |
143 | gboolean status; | |
144 | GString *sname, *scontents; | |
145 | ||
146 | /* Skip any initial white-space */ | |
147 | if (!read_until(file, NULL, 'N')) return FALSE; | |
148 | ||
149 | /* Section tag should start with $. */ | |
e4c8a4d7 | 150 | if (fgetc(file) != '$') { |
99eaa206 PA |
151 | sr_err("Expected $ at beginning of section."); |
152 | return FALSE; | |
153 | } | |
154 | ||
155 | /* Read the section tag */ | |
156 | sname = g_string_sized_new(32); | |
157 | status = read_until(file, sname, 'W'); | |
158 | ||
159 | /* Skip whitespace before content */ | |
160 | status = status && read_until(file, NULL, 'N'); | |
161 | ||
162 | /* Read the content */ | |
163 | scontents = g_string_sized_new(128); | |
164 | status = status && read_until(file, scontents, '$'); | |
165 | g_strchomp(scontents->str); | |
166 | ||
167 | /* Release strings if status is FALSE, return them if status is TRUE */ | |
168 | *name = g_string_free(sname, !status); | |
169 | *contents = g_string_free(scontents, !status); | |
170 | return status; | |
171 | } | |
172 | ||
db9679af ML |
173 | static void free_probe(void *data) |
174 | { | |
175 | struct probe *probe = data; | |
176 | g_free(probe->name); | |
177 | g_free(probe->identifier); | |
178 | g_free(probe); | |
179 | } | |
180 | ||
61a429c9 PA |
181 | static void release_context(struct context *ctx) |
182 | { | |
db9679af | 183 | g_slist_free_full(ctx->probes, free_probe); |
61a429c9 PA |
184 | g_free(ctx); |
185 | } | |
186 | ||
99eaa206 PA |
187 | /* Remove empty parts from an array returned by g_strsplit. */ |
188 | static void remove_empty_parts(gchar **parts) | |
189 | { | |
190 | gchar **src = parts; | |
191 | gchar **dest = parts; | |
e4c8a4d7 | 192 | while (*src != NULL) { |
99eaa206 | 193 | if (**src != '\0') |
99eaa206 | 194 | *dest++ = *src; |
99eaa206 PA |
195 | src++; |
196 | } | |
197 | ||
198 | *dest = NULL; | |
199 | } | |
200 | ||
e4c8a4d7 BV |
201 | /* |
202 | * Parse VCD header to get values for context structure. | |
99eaa206 PA |
203 | * The context structure should be zeroed before calling this. |
204 | */ | |
205 | static gboolean parse_header(FILE *file, struct context *ctx) | |
206 | { | |
e48a5462 | 207 | uint64_t p, q; |
99eaa206 PA |
208 | gchar *name = NULL, *contents = NULL; |
209 | gboolean status = FALSE; | |
db9679af | 210 | struct probe *probe; |
99eaa206 | 211 | |
e4c8a4d7 | 212 | while (parse_section(file, &name, &contents)) { |
99eaa206 PA |
213 | sr_dbg("Section '%s', contents '%s'.", name, contents); |
214 | ||
e4c8a4d7 | 215 | if (g_strcmp0(name, "enddefinitions") == 0) { |
99eaa206 PA |
216 | status = TRUE; |
217 | break; | |
e4c8a4d7 BV |
218 | } else if (g_strcmp0(name, "timescale") == 0) { |
219 | /* | |
220 | * The standard allows for values 1, 10 or 100 | |
221 | * and units s, ms, us, ns, ps and fs. | |
222 | * */ | |
223 | if (sr_parse_period(contents, &p, &q) == SR_OK) { | |
e48a5462 | 224 | ctx->samplerate = q / p; |
e4c8a4d7 | 225 | if (q % p != 0) { |
99eaa206 | 226 | /* Does not happen unless time value is non-standard */ |
0157808d | 227 | sr_warn("Inexact rounding of samplerate, %" PRIu64 " / %" PRIu64 " to %" PRIu64 " Hz.", |
e48a5462 | 228 | q, p, ctx->samplerate); |
99eaa206 PA |
229 | } |
230 | ||
231 | sr_dbg("Samplerate: %" PRIu64, ctx->samplerate); | |
e4c8a4d7 | 232 | } else { |
99eaa206 PA |
233 | sr_err("Parsing timescale failed."); |
234 | } | |
e4c8a4d7 | 235 | } else if (g_strcmp0(name, "var") == 0) { |
99eaa206 PA |
236 | /* Format: $var type size identifier reference $end */ |
237 | gchar **parts = g_strsplit_set(contents, " \r\n\t", 0); | |
238 | remove_empty_parts(parts); | |
239 | ||
240 | if (g_strv_length(parts) != 4) | |
8be87469 | 241 | sr_warn("$var section should have 4 items"); |
99eaa206 | 242 | else if (g_strcmp0(parts[0], "reg") != 0 && g_strcmp0(parts[0], "wire") != 0) |
8be87469 | 243 | sr_info("Unsupported signal type: '%s'", parts[0]); |
99eaa206 | 244 | else if (strtol(parts[1], NULL, 10) != 1) |
8be87469 | 245 | sr_info("Unsupported signal size: '%s'", parts[1]); |
99eaa206 | 246 | else if (ctx->probecount >= ctx->maxprobes) |
99eaa206 | 247 | sr_warn("Skipping '%s' because only %d probes requested.", parts[3], ctx->maxprobes); |
e4c8a4d7 | 248 | else { |
99eaa206 | 249 | sr_info("Probe %d is '%s' identified by '%s'.", ctx->probecount, parts[3], parts[2]); |
db9679af ML |
250 | probe = g_malloc(sizeof(struct probe)); |
251 | probe->identifier = g_strdup(parts[2]); | |
252 | probe->name = g_strdup(parts[3]); | |
253 | ctx->probes = g_slist_append(ctx->probes, probe); | |
99eaa206 PA |
254 | ctx->probecount++; |
255 | } | |
256 | ||
257 | g_strfreev(parts); | |
258 | } | |
259 | ||
260 | g_free(name); name = NULL; | |
261 | g_free(contents); contents = NULL; | |
262 | } | |
263 | ||
264 | g_free(name); | |
265 | g_free(contents); | |
266 | ||
267 | return status; | |
268 | } | |
269 | ||
270 | static int format_match(const char *filename) | |
271 | { | |
272 | FILE *file; | |
273 | gchar *name = NULL, *contents = NULL; | |
274 | gboolean status; | |
275 | ||
276 | file = fopen(filename, "r"); | |
277 | if (file == NULL) | |
278 | return FALSE; | |
279 | ||
e4c8a4d7 BV |
280 | /* |
281 | * If we can parse the first section correctly, | |
99eaa206 PA |
282 | * then it is assumed to be a VCD file. |
283 | */ | |
284 | status = parse_section(file, &name, &contents); | |
285 | status = status && (*name != '\0'); | |
286 | ||
287 | g_free(name); | |
288 | g_free(contents); | |
289 | fclose(file); | |
290 | ||
291 | return status; | |
292 | } | |
293 | ||
543d45c5 | 294 | static int init(struct sr_input *in, const char *filename) |
99eaa206 PA |
295 | { |
296 | struct sr_probe *probe; | |
297 | int num_probes, i; | |
298 | char name[SR_MAX_PROBENAME_LEN + 1]; | |
299 | char *param; | |
300 | struct context *ctx; | |
301 | ||
543d45c5 BV |
302 | (void)filename; |
303 | ||
99eaa206 PA |
304 | if (!(ctx = g_try_malloc0(sizeof(*ctx)))) { |
305 | sr_err("Input format context malloc failed."); | |
306 | return SR_ERR_MALLOC; | |
307 | } | |
308 | ||
309 | num_probes = DEFAULT_NUM_PROBES; | |
310 | ctx->samplerate = 0; | |
0157808d PA |
311 | ctx->downsample = 1; |
312 | ctx->skip = -1; | |
99eaa206 PA |
313 | |
314 | if (in->param) { | |
315 | param = g_hash_table_lookup(in->param, "numprobes"); | |
316 | if (param) { | |
317 | num_probes = strtoul(param, NULL, 10); | |
e4c8a4d7 | 318 | if (num_probes < 1) { |
61a429c9 | 319 | release_context(ctx); |
99eaa206 | 320 | return SR_ERR; |
6c57446d BV |
321 | } else if (num_probes > 64) { |
322 | sr_err("No more than 64 probes supported."); | |
323 | return SR_ERR; | |
61a429c9 | 324 | } |
99eaa206 | 325 | } |
0157808d PA |
326 | |
327 | param = g_hash_table_lookup(in->param, "downsample"); | |
328 | if (param) { | |
329 | ctx->downsample = strtoul(param, NULL, 10); | |
330 | if (ctx->downsample < 1) | |
0157808d | 331 | ctx->downsample = 1; |
0157808d PA |
332 | } |
333 | ||
6b7ace48 | 334 | param = g_hash_table_lookup(in->param, "compress"); |
e4c8a4d7 | 335 | if (param) |
6b7ace48 | 336 | ctx->compress = strtoul(param, NULL, 10); |
6b7ace48 | 337 | |
0157808d | 338 | param = g_hash_table_lookup(in->param, "skip"); |
e4c8a4d7 | 339 | if (param) |
0157808d | 340 | ctx->skip = strtoul(param, NULL, 10) / ctx->downsample; |
99eaa206 PA |
341 | } |
342 | ||
343 | /* Maximum number of probes to parse from the VCD */ | |
344 | ctx->maxprobes = num_probes; | |
345 | ||
346 | /* Create a virtual device. */ | |
347 | in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL); | |
348 | in->internal = ctx; | |
349 | ||
350 | for (i = 0; i < num_probes; i++) { | |
351 | snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i); | |
352 | ||
e4c8a4d7 | 353 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, name))) { |
61a429c9 | 354 | release_context(ctx); |
99eaa206 | 355 | return SR_ERR; |
61a429c9 PA |
356 | } |
357 | ||
99eaa206 PA |
358 | in->sdi->probes = g_slist_append(in->sdi->probes, probe); |
359 | } | |
360 | ||
361 | return SR_OK; | |
362 | } | |
363 | ||
61a429c9 PA |
364 | /* Send N samples of the given value. */ |
365 | static void send_samples(const struct sr_dev_inst *sdi, uint64_t sample, uint64_t count) | |
366 | { | |
367 | struct sr_datafeed_packet packet; | |
368 | struct sr_datafeed_logic logic; | |
369 | uint64_t buffer[CHUNKSIZE]; | |
370 | uint64_t i; | |
371 | unsigned chunksize = CHUNKSIZE; | |
0157808d | 372 | |
61a429c9 PA |
373 | if (count < chunksize) |
374 | chunksize = count; | |
375 | ||
376 | for (i = 0; i < chunksize; i++) | |
61a429c9 | 377 | buffer[i] = sample; |
61a429c9 PA |
378 | |
379 | packet.type = SR_DF_LOGIC; | |
380 | packet.payload = &logic; | |
381 | logic.unitsize = sizeof(uint64_t); | |
382 | logic.data = buffer; | |
383 | ||
e4c8a4d7 | 384 | while (count) { |
61a429c9 PA |
385 | if (count < chunksize) |
386 | chunksize = count; | |
387 | ||
388 | logic.length = sizeof(uint64_t) * chunksize; | |
389 | ||
390 | sr_session_send(sdi, &packet); | |
391 | count -= chunksize; | |
392 | } | |
393 | } | |
394 | ||
395 | /* Parse the data section of VCD */ | |
396 | static void parse_contents(FILE *file, const struct sr_dev_inst *sdi, struct context *ctx) | |
397 | { | |
398 | GString *token = g_string_sized_new(32); | |
399 | ||
61a429c9 PA |
400 | uint64_t prev_timestamp = 0; |
401 | uint64_t prev_values = 0; | |
402 | ||
403 | /* Read one space-delimited token at a time. */ | |
e4c8a4d7 BV |
404 | while (read_until(file, NULL, 'N') && read_until(file, token, 'W')) { |
405 | if (token->str[0] == '#' && g_ascii_isdigit(token->str[1])) { | |
61a429c9 PA |
406 | /* Numeric value beginning with # is a new timestamp value */ |
407 | uint64_t timestamp; | |
408 | timestamp = strtoull(token->str + 1, NULL, 10); | |
409 | ||
0157808d PA |
410 | if (ctx->downsample > 1) |
411 | timestamp /= ctx->downsample; | |
412 | ||
e4c8a4d7 BV |
413 | /* |
414 | * Skip < 0 => skip until first timestamp. | |
0157808d PA |
415 | * Skip = 0 => don't skip |
416 | * Skip > 0 => skip until timestamp >= skip. | |
417 | */ | |
e4c8a4d7 | 418 | if (ctx->skip < 0) { |
0157808d | 419 | ctx->skip = timestamp; |
8be87469 | 420 | prev_timestamp = timestamp; |
e4c8a4d7 | 421 | } else if (ctx->skip > 0 && timestamp < (uint64_t)ctx->skip) { |
8be87469 | 422 | prev_timestamp = ctx->skip; |
0157808d | 423 | } |
e4c8a4d7 | 424 | else if (timestamp == prev_timestamp) { |
8be87469 | 425 | /* Ignore repeated timestamps (e.g. sigrok outputs these) */ |
61a429c9 | 426 | } |
e4c8a4d7 | 427 | else { |
6b7ace48 PA |
428 | if (ctx->compress != 0 && timestamp - prev_timestamp > ctx->compress) |
429 | { | |
430 | /* Compress long idle periods */ | |
431 | prev_timestamp = timestamp - ctx->compress; | |
432 | } | |
433 | ||
61a429c9 PA |
434 | sr_dbg("New timestamp: %" PRIu64, timestamp); |
435 | ||
436 | /* Generate samples from prev_timestamp up to timestamp - 1. */ | |
8be87469 | 437 | send_samples(sdi, prev_values, timestamp - prev_timestamp); |
0157808d | 438 | prev_timestamp = timestamp; |
61a429c9 | 439 | } |
e4c8a4d7 | 440 | } else if (token->str[0] == '$' && token->len > 1) { |
61a429c9 | 441 | /* This is probably a $dumpvars, $comment or similar. |
8be87469 | 442 | * $dump* contain useful data, but other tags will be skipped until $end. */ |
e4c8a4d7 BV |
443 | if (g_strcmp0(token->str, "$dumpvars") == 0 |
444 | || g_strcmp0(token->str, "$dumpon") == 0 | |
445 | || g_strcmp0(token->str, "$dumpoff") == 0 | |
446 | || g_strcmp0(token->str, "$end") == 0) { | |
8be87469 | 447 | /* Ignore, parse contents as normally. */ |
e4c8a4d7 | 448 | } else { |
8be87469 PA |
449 | /* Skip until $end */ |
450 | read_until(file, NULL, '$'); | |
451 | } | |
452 | } | |
e4c8a4d7 | 453 | else if (strchr("bBrR", token->str[0]) != NULL) { |
8be87469 PA |
454 | /* A vector value. Skip it and also the following identifier. */ |
455 | read_until(file, NULL, 'N'); | |
456 | read_until(file, NULL, 'W'); | |
e4c8a4d7 | 457 | } else if (strchr("01xXzZ", token->str[0]) != NULL) { |
61a429c9 PA |
458 | /* A new 1-bit sample value */ |
459 | int i, bit; | |
db9679af ML |
460 | GSList *l; |
461 | struct probe *probe; | |
462 | ||
61a429c9 PA |
463 | bit = (token->str[0] == '1'); |
464 | ||
465 | g_string_erase(token, 0, 1); | |
e4c8a4d7 | 466 | if (token->len == 0) { |
61a429c9 PA |
467 | /* There was a space between value and identifier. |
468 | * Read in the rest. | |
469 | */ | |
470 | read_until(file, NULL, 'N'); | |
471 | read_until(file, token, 'W'); | |
472 | } | |
473 | ||
e4c8a4d7 | 474 | for (i = 0, l = ctx->probes; i < ctx->probecount && l; i++, l = l->next) { |
db9679af ML |
475 | probe = l->data; |
476 | ||
e4c8a4d7 | 477 | if (g_strcmp0(token->str, probe->identifier) == 0) { |
61a429c9 PA |
478 | sr_dbg("Probe %d new value %d.", i, bit); |
479 | ||
480 | /* Found our probe */ | |
481 | if (bit) | |
8be87469 | 482 | prev_values |= (1 << i); |
61a429c9 | 483 | else |
8be87469 | 484 | prev_values &= ~(1 << i); |
61a429c9 PA |
485 | |
486 | break; | |
487 | } | |
488 | } | |
489 | ||
490 | if (i == ctx->probecount) | |
8be87469 | 491 | sr_dbg("Did not find probe for identifier '%s'.", token->str); |
e4c8a4d7 | 492 | } else { |
8be87469 PA |
493 | sr_warn("Skipping unknown token '%s'.", token->str); |
494 | } | |
61a429c9 PA |
495 | |
496 | g_string_truncate(token, 0); | |
497 | } | |
498 | ||
499 | g_string_free(token, TRUE); | |
500 | } | |
501 | ||
99eaa206 PA |
502 | static int loadfile(struct sr_input *in, const char *filename) |
503 | { | |
99eaa206 | 504 | struct sr_datafeed_packet packet; |
2df1e819 BV |
505 | struct sr_datafeed_meta meta; |
506 | struct sr_config *src; | |
99eaa206 PA |
507 | FILE *file; |
508 | struct context *ctx; | |
2df1e819 | 509 | uint64_t samplerate; |
99eaa206 PA |
510 | |
511 | ctx = in->internal; | |
512 | ||
513 | if ((file = fopen(filename, "r")) == NULL) | |
514 | return SR_ERR; | |
515 | ||
e4c8a4d7 | 516 | if (!parse_header(file, ctx)) { |
99eaa206 PA |
517 | sr_err("VCD parsing failed"); |
518 | fclose(file); | |
519 | return SR_ERR; | |
520 | } | |
521 | ||
522 | /* Send header packet to the session bus. */ | |
29a27196 | 523 | std_session_send_df_header(in->sdi, LOG_PREFIX); |
99eaa206 PA |
524 | |
525 | /* Send metadata about the SR_DF_LOGIC packets to come. */ | |
2df1e819 | 526 | packet.type = SR_DF_META; |
99eaa206 | 527 | packet.payload = &meta; |
2df1e819 | 528 | samplerate = ctx->samplerate / ctx->downsample; |
ec4063b8 | 529 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(samplerate)); |
2df1e819 | 530 | meta.config = g_slist_append(NULL, src); |
99eaa206 | 531 | sr_session_send(in->sdi, &packet); |
ec4063b8 | 532 | sr_config_free(src); |
99eaa206 | 533 | |
61a429c9 PA |
534 | /* Parse the contents of the VCD file */ |
535 | parse_contents(file, in->sdi, ctx); | |
536 | ||
99eaa206 PA |
537 | /* Send end packet to the session bus. */ |
538 | packet.type = SR_DF_END; | |
539 | sr_session_send(in->sdi, &packet); | |
540 | ||
61a429c9 PA |
541 | fclose(file); |
542 | release_context(ctx); | |
99eaa206 PA |
543 | in->internal = NULL; |
544 | ||
545 | return SR_OK; | |
546 | } | |
547 | ||
548 | SR_PRIV struct sr_input_format input_vcd = { | |
549 | .id = "vcd", | |
550 | .description = "Value Change Dump", | |
551 | .format_match = format_match, | |
552 | .init = init, | |
553 | .loadfile = loadfile, | |
554 | }; |