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1 | /* | |
2 | * This file is part of the libsigrokdecode project. | |
3 | * | |
4 | * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include "libsigrokdecode-internal.h" | |
23 | #include "config.h" | |
24 | #include <glib.h> | |
25 | #include <inttypes.h> | |
26 | #include <stdlib.h> | |
27 | #include <stdint.h> | |
28 | ||
29 | /** | |
30 | * @mainpage libsigrokdecode API | |
31 | * | |
32 | * @section sec_intro Introduction | |
33 | * | |
34 | * The <a href="http://sigrok.org">sigrok</a> project aims at creating a | |
35 | * portable, cross-platform, Free/Libre/Open-Source signal analysis software | |
36 | * suite that supports various device types (such as logic analyzers, | |
37 | * oscilloscopes, multimeters, and more). | |
38 | * | |
39 | * <a href="http://sigrok.org/wiki/Libsigrokdecode">libsigrokdecode</a> is a | |
40 | * shared library written in C which provides the basic API for (streaming) | |
41 | * protocol decoding functionality. | |
42 | * | |
43 | * The <a href="http://sigrok.org/wiki/Protocol_decoders">protocol decoders</a> | |
44 | * are written in Python (>= 3.0). | |
45 | * | |
46 | * @section sec_api API reference | |
47 | * | |
48 | * See the "Modules" page for an introduction to various libsigrokdecode | |
49 | * related topics and the detailed API documentation of the respective | |
50 | * functions. | |
51 | * | |
52 | * You can also browse the API documentation by file, or review all | |
53 | * data structures. | |
54 | * | |
55 | * @section sec_mailinglists Mailing lists | |
56 | * | |
57 | * There are two mailing lists for sigrok/libsigrokdecode: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a> and <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-commits">sigrok-commits</a>. | |
58 | * | |
59 | * @section sec_irc IRC | |
60 | * | |
61 | * You can find the sigrok developers in the | |
62 | * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a> | |
63 | * IRC channel on Freenode. | |
64 | * | |
65 | * @section sec_website Website | |
66 | * | |
67 | * <a href="http://sigrok.org/wiki/Libsigrokdecode">sigrok.org/wiki/Libsigrokdecode</a> | |
68 | */ | |
69 | ||
70 | /** | |
71 | * @file | |
72 | * | |
73 | * Initializing and shutting down libsigrokdecode. | |
74 | */ | |
75 | ||
76 | /** | |
77 | * @defgroup grp_init Initialization | |
78 | * | |
79 | * Initializing and shutting down libsigrokdecode. | |
80 | * | |
81 | * Before using any of the libsigrokdecode functionality, srd_init() must | |
82 | * be called to initialize the library. | |
83 | * | |
84 | * When libsigrokdecode functionality is no longer needed, srd_exit() should | |
85 | * be called. | |
86 | * | |
87 | * @{ | |
88 | */ | |
89 | ||
90 | /** @cond PRIVATE */ | |
91 | ||
92 | SRD_PRIV GSList *sessions = NULL; | |
93 | static int max_session_id = -1; | |
94 | ||
95 | static int session_is_valid(struct srd_session *sess); | |
96 | ||
97 | /* decoder.c */ | |
98 | extern SRD_PRIV GSList *pd_list; | |
99 | ||
100 | /* module_sigrokdecode.c */ | |
101 | extern PyMODINIT_FUNC PyInit_sigrokdecode(void); | |
102 | ||
103 | /* type_logic.c */ | |
104 | extern SRD_PRIV PyTypeObject srd_logic_type; | |
105 | ||
106 | /** @endcond */ | |
107 | ||
108 | /** | |
109 | * Initialize libsigrokdecode. | |
110 | * | |
111 | * This initializes the Python interpreter, and creates and initializes | |
112 | * a "sigrokdecode" Python module. | |
113 | * | |
114 | * Then, it searches for sigrok protocol decoders in the "decoders" | |
115 | * subdirectory of the the libsigrokdecode installation directory. | |
116 | * All decoders that are found are loaded into memory and added to an | |
117 | * internal list of decoders, which can be queried via srd_decoder_list(). | |
118 | * | |
119 | * The caller is responsible for calling the clean-up function srd_exit(), | |
120 | * which will properly shut down libsigrokdecode and free its allocated memory. | |
121 | * | |
122 | * Multiple calls to srd_init(), without calling srd_exit() in between, | |
123 | * are not allowed. | |
124 | * | |
125 | * @param path Path to an extra directory containing protocol decoders | |
126 | * which will be added to the Python sys.path. May be NULL. | |
127 | * | |
128 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
129 | * Upon Python errors, SRD_ERR_PYTHON is returned. If the decoders | |
130 | * directory cannot be accessed, SRD_ERR_DECODERS_DIR is returned. | |
131 | * If not enough memory could be allocated, SRD_ERR_MALLOC is returned. | |
132 | * | |
133 | * @since 0.1.0 | |
134 | */ | |
135 | SRD_API int srd_init(const char *path) | |
136 | { | |
137 | int ret; | |
138 | char *env_path; | |
139 | ||
140 | if (max_session_id != -1) { | |
141 | srd_err("libsigrokdecode is already initialized."); | |
142 | return SRD_ERR; | |
143 | } | |
144 | ||
145 | srd_dbg("Initializing libsigrokdecode."); | |
146 | ||
147 | /* Add our own module to the list of built-in modules. */ | |
148 | PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode); | |
149 | ||
150 | /* Initialize the Python interpreter. */ | |
151 | Py_Initialize(); | |
152 | ||
153 | /* Installed decoders. */ | |
154 | if ((ret = srd_decoder_searchpath_add(DECODERS_DIR)) != SRD_OK) { | |
155 | Py_Finalize(); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | /* Path specified by the user. */ | |
160 | if (path) { | |
161 | if ((ret = srd_decoder_searchpath_add(path)) != SRD_OK) { | |
162 | Py_Finalize(); | |
163 | return ret; | |
164 | } | |
165 | } | |
166 | ||
167 | /* Environment variable overrides everything, for debugging. */ | |
168 | if ((env_path = getenv("SIGROKDECODE_DIR"))) { | |
169 | if ((ret = srd_decoder_searchpath_add(env_path)) != SRD_OK) { | |
170 | Py_Finalize(); | |
171 | return ret; | |
172 | } | |
173 | } | |
174 | ||
175 | max_session_id = 0; | |
176 | ||
177 | return SRD_OK; | |
178 | } | |
179 | ||
180 | /** | |
181 | * Shutdown libsigrokdecode. | |
182 | * | |
183 | * This frees all the memory allocated for protocol decoders and shuts down | |
184 | * the Python interpreter. | |
185 | * | |
186 | * This function should only be called if there was a (successful!) invocation | |
187 | * of srd_init() before. Calling this function multiple times in a row, without | |
188 | * any successful srd_init() calls in between, is not allowed. | |
189 | * | |
190 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
191 | * | |
192 | * @since 0.1.0 | |
193 | */ | |
194 | SRD_API int srd_exit(void) | |
195 | { | |
196 | GSList *l; | |
197 | ||
198 | srd_dbg("Exiting libsigrokdecode."); | |
199 | ||
200 | for (l = sessions; l; l = l->next) | |
201 | srd_session_destroy((struct srd_session *)l->data); | |
202 | ||
203 | srd_decoder_unload_all(); | |
204 | g_slist_free(pd_list); | |
205 | pd_list = NULL; | |
206 | ||
207 | /* Py_Finalize() returns void, any finalization errors are ignored. */ | |
208 | Py_Finalize(); | |
209 | ||
210 | max_session_id = -1; | |
211 | ||
212 | return SRD_OK; | |
213 | } | |
214 | ||
215 | /** | |
216 | * Add an additional search directory for the protocol decoders. | |
217 | * | |
218 | * The specified directory is prepended (not appended!) to Python's sys.path, | |
219 | * in order to search for sigrok protocol decoders in the specified | |
220 | * directories first, and in the generic Python module directories (and in | |
221 | * the current working directory) last. This avoids conflicts if there are | |
222 | * Python modules which have the same name as a sigrok protocol decoder in | |
223 | * sys.path or in the current working directory. | |
224 | * | |
225 | * @param path Path to the directory containing protocol decoders which shall | |
226 | * be added to the Python sys.path, or NULL. | |
227 | * | |
228 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
229 | * | |
230 | * @private | |
231 | * | |
232 | * @since 0.1.0 | |
233 | */ | |
234 | SRD_PRIV int srd_decoder_searchpath_add(const char *path) | |
235 | { | |
236 | PyObject *py_cur_path, *py_item; | |
237 | GString *new_path; | |
238 | int wc_len, i; | |
239 | wchar_t *wc_new_path; | |
240 | char *item; | |
241 | ||
242 | srd_dbg("Adding '%s' to module path.", path); | |
243 | ||
244 | new_path = g_string_sized_new(256); | |
245 | g_string_assign(new_path, path); | |
246 | py_cur_path = PySys_GetObject("path"); | |
247 | for (i = 0; i < PyList_Size(py_cur_path); i++) { | |
248 | g_string_append(new_path, G_SEARCHPATH_SEPARATOR_S); | |
249 | py_item = PyList_GetItem(py_cur_path, i); | |
250 | if (!PyUnicode_Check(py_item)) | |
251 | /* Shouldn't happen. */ | |
252 | continue; | |
253 | if (py_str_as_str(py_item, &item) != SRD_OK) | |
254 | continue; | |
255 | g_string_append(new_path, item); | |
256 | g_free(item); | |
257 | } | |
258 | ||
259 | /* Convert to wide chars. */ | |
260 | wc_len = sizeof(wchar_t) * (new_path->len + 1); | |
261 | if (!(wc_new_path = g_try_malloc(wc_len))) { | |
262 | srd_dbg("malloc failed"); | |
263 | return SRD_ERR_MALLOC; | |
264 | } | |
265 | mbstowcs(wc_new_path, new_path->str, wc_len); | |
266 | PySys_SetPath(wc_new_path); | |
267 | g_string_free(new_path, TRUE); | |
268 | g_free(wc_new_path); | |
269 | ||
270 | return SRD_OK; | |
271 | } | |
272 | ||
273 | /** @} */ | |
274 | ||
275 | /** | |
276 | * @defgroup grp_instances Decoder instances | |
277 | * | |
278 | * Decoder instance handling. | |
279 | * | |
280 | * @{ | |
281 | */ | |
282 | ||
283 | /** | |
284 | * Set one or more options in a decoder instance. | |
285 | * | |
286 | * Handled options are removed from the hash. | |
287 | * | |
288 | * @param di Decoder instance. | |
289 | * @param options A GHashTable of options to set. | |
290 | * | |
291 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
292 | * | |
293 | * @since 0.1.0 | |
294 | */ | |
295 | SRD_API int srd_inst_option_set(struct srd_decoder_inst *di, | |
296 | GHashTable *options) | |
297 | { | |
298 | PyObject *py_dec_options, *py_dec_optkeys, *py_di_options, *py_optval; | |
299 | PyObject *py_optlist, *py_classval; | |
300 | Py_UNICODE *py_ustr; | |
301 | GVariant *value; | |
302 | unsigned long long int val_ull; | |
303 | gint64 val_int; | |
304 | int num_optkeys, ret, size, i; | |
305 | const char *val_str; | |
306 | char *dbg, *key; | |
307 | ||
308 | if (!di) { | |
309 | srd_err("Invalid decoder instance."); | |
310 | return SRD_ERR_ARG; | |
311 | } | |
312 | ||
313 | if (!options) { | |
314 | srd_err("Invalid options GHashTable."); | |
315 | return SRD_ERR_ARG; | |
316 | } | |
317 | ||
318 | if (!PyObject_HasAttrString(di->decoder->py_dec, "options")) { | |
319 | /* Decoder has no options. */ | |
320 | if (g_hash_table_size(options) == 0) { | |
321 | /* No options provided. */ | |
322 | return SRD_OK; | |
323 | } else { | |
324 | srd_err("Protocol decoder has no options."); | |
325 | return SRD_ERR_ARG; | |
326 | } | |
327 | return SRD_OK; | |
328 | } | |
329 | ||
330 | ret = SRD_ERR_PYTHON; | |
331 | key = NULL; | |
332 | py_dec_options = py_dec_optkeys = py_di_options = py_optval = NULL; | |
333 | py_optlist = py_classval = NULL; | |
334 | py_dec_options = PyObject_GetAttrString(di->decoder->py_dec, "options"); | |
335 | ||
336 | /* All of these are synthesized objects, so they're good. */ | |
337 | py_dec_optkeys = PyDict_Keys(py_dec_options); | |
338 | num_optkeys = PyList_Size(py_dec_optkeys); | |
339 | ||
340 | /* | |
341 | * The 'options' dictionary is a class variable, but we need to | |
342 | * change it. Changing it directly will affect the entire class, | |
343 | * so we need to create a new object for it, and populate that | |
344 | * instead. | |
345 | */ | |
346 | if (!(py_di_options = PyObject_GetAttrString(di->py_inst, "options"))) | |
347 | goto err_out; | |
348 | Py_DECREF(py_di_options); | |
349 | py_di_options = PyDict_New(); | |
350 | PyObject_SetAttrString(di->py_inst, "options", py_di_options); | |
351 | for (i = 0; i < num_optkeys; i++) { | |
352 | /* Get the default class value for this option. */ | |
353 | py_str_as_str(PyList_GetItem(py_dec_optkeys, i), &key); | |
354 | if (!(py_optlist = PyDict_GetItemString(py_dec_options, key))) | |
355 | goto err_out; | |
356 | if (!(py_classval = PyList_GetItem(py_optlist, 1))) | |
357 | goto err_out; | |
358 | if (!PyUnicode_Check(py_classval) && !PyLong_Check(py_classval)) { | |
359 | srd_err("Options of type %s are not yet supported.", | |
360 | Py_TYPE(py_classval)->tp_name); | |
361 | goto err_out; | |
362 | } | |
363 | ||
364 | if ((value = g_hash_table_lookup(options, key))) { | |
365 | dbg = g_variant_print(value, TRUE); | |
366 | srd_dbg("got option '%s' = %s", key, dbg); | |
367 | g_free(dbg); | |
368 | /* An override for this option was provided. */ | |
369 | if (PyUnicode_Check(py_classval)) { | |
370 | if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING)) { | |
371 | srd_err("Option '%s' requires a string value.", key); | |
372 | goto err_out; | |
373 | } | |
374 | val_str = g_variant_get_string(value, NULL); | |
375 | if (!(py_optval = PyUnicode_FromString(val_str))) { | |
376 | /* Some UTF-8 encoding error. */ | |
377 | PyErr_Clear(); | |
378 | srd_err("Option '%s' requires a UTF-8 string value.", key); | |
379 | goto err_out; | |
380 | } | |
381 | } else if (PyLong_Check(py_classval)) { | |
382 | if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT64)) { | |
383 | srd_err("Option '%s' requires an integer value.", key); | |
384 | goto err_out; | |
385 | } | |
386 | val_int = g_variant_get_int64(value); | |
387 | if (!(py_optval = PyLong_FromLong(val_int))) { | |
388 | /* ValueError Exception */ | |
389 | PyErr_Clear(); | |
390 | srd_err("Option '%s' has invalid integer value.", key); | |
391 | goto err_out; | |
392 | } | |
393 | } | |
394 | g_hash_table_remove(options, key); | |
395 | } else { | |
396 | /* Use the class default for this option. */ | |
397 | if (PyUnicode_Check(py_classval)) { | |
398 | /* Make a brand new copy of the string. */ | |
399 | py_ustr = PyUnicode_AS_UNICODE(py_classval); | |
400 | size = PyUnicode_GET_SIZE(py_classval); | |
401 | py_optval = PyUnicode_FromUnicode(py_ustr, size); | |
402 | } else if (PyLong_Check(py_classval)) { | |
403 | /* Make a brand new copy of the integer. */ | |
404 | val_ull = PyLong_AsUnsignedLongLong(py_classval); | |
405 | if (val_ull == (unsigned long long)-1) { | |
406 | /* OverFlowError exception */ | |
407 | PyErr_Clear(); | |
408 | srd_err("Invalid integer value for %s: " | |
409 | "expected integer.", key); | |
410 | goto err_out; | |
411 | } | |
412 | if (!(py_optval = PyLong_FromUnsignedLongLong(val_ull))) | |
413 | goto err_out; | |
414 | } | |
415 | } | |
416 | ||
417 | /* | |
418 | * If we got here, py_optval holds a known good new reference | |
419 | * to the instance option to set. | |
420 | */ | |
421 | if (PyDict_SetItemString(py_di_options, key, py_optval) == -1) | |
422 | goto err_out; | |
423 | g_free(key); | |
424 | key = NULL; | |
425 | } | |
426 | ||
427 | ret = SRD_OK; | |
428 | ||
429 | err_out: | |
430 | Py_XDECREF(py_di_options); | |
431 | Py_XDECREF(py_dec_optkeys); | |
432 | Py_XDECREF(py_dec_options); | |
433 | g_free(key); | |
434 | if (PyErr_Occurred()) { | |
435 | srd_exception_catch("Stray exception in srd_inst_option_set()."); | |
436 | ret = SRD_ERR_PYTHON; | |
437 | } | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | /* Helper GComparefunc for g_slist_find_custom() in srd_inst_probe_set_all() */ | |
443 | static gint compare_probe_id(const struct srd_probe *a, const char *probe_id) | |
444 | { | |
445 | return strcmp(a->id, probe_id); | |
446 | } | |
447 | ||
448 | /** | |
449 | * Set all probes in a decoder instance. | |
450 | * | |
451 | * This function sets _all_ probes for the specified decoder instance, i.e., | |
452 | * it overwrites any probes that were already defined (if any). | |
453 | * | |
454 | * @param di Decoder instance. | |
455 | * @param new_probes A GHashTable of probes to set. Key is probe name, value is | |
456 | * the probe number. Samples passed to this instance will be | |
457 | * arranged in this order. | |
458 | * | |
459 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
460 | * | |
461 | * @since 0.1.0 | |
462 | */ | |
463 | SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di, | |
464 | GHashTable *new_probes) | |
465 | { | |
466 | GVariant *probe_val; | |
467 | GList *l; | |
468 | GSList *sl; | |
469 | struct srd_probe *p; | |
470 | int *new_probemap, new_probenum, num_required_probes, num_probes, i; | |
471 | char *probe_id; | |
472 | ||
473 | srd_dbg("set probes called for instance %s with list of %d probes", | |
474 | di->inst_id, g_hash_table_size(new_probes)); | |
475 | ||
476 | if (g_hash_table_size(new_probes) == 0) | |
477 | /* No probes provided. */ | |
478 | return SRD_OK; | |
479 | ||
480 | if (di->dec_num_probes == 0) { | |
481 | /* Decoder has no probes. */ | |
482 | srd_err("Protocol decoder %s has no probes to define.", | |
483 | di->decoder->name); | |
484 | return SRD_ERR_ARG; | |
485 | } | |
486 | ||
487 | new_probemap = NULL; | |
488 | ||
489 | if (!(new_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
490 | srd_err("Failed to g_malloc() new probe map."); | |
491 | return SRD_ERR_MALLOC; | |
492 | } | |
493 | ||
494 | /* | |
495 | * For now, map all indexes to probe -1 (can be overridden later). | |
496 | * This -1 is interpreted as an unspecified probe later. | |
497 | */ | |
498 | for (i = 0; i < di->dec_num_probes; i++) | |
499 | new_probemap[i] = -1; | |
500 | ||
501 | num_probes = 0; | |
502 | for (l = g_hash_table_get_keys(new_probes); l; l = l->next) { | |
503 | probe_id = l->data; | |
504 | probe_val = g_hash_table_lookup(new_probes, probe_id); | |
505 | if (!g_variant_is_of_type(probe_val, G_VARIANT_TYPE_INT32)) { | |
506 | /* Probe name was specified without a value. */ | |
507 | srd_err("No probe number was specified for %s.", | |
508 | probe_id); | |
509 | g_free(new_probemap); | |
510 | return SRD_ERR_ARG; | |
511 | } | |
512 | new_probenum = g_variant_get_int32(probe_val); | |
513 | if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id, | |
514 | (GCompareFunc)compare_probe_id))) { | |
515 | /* Fall back on optional probes. */ | |
516 | if (!(sl = g_slist_find_custom(di->decoder->opt_probes, | |
517 | probe_id, (GCompareFunc) compare_probe_id))) { | |
518 | srd_err("Protocol decoder %s has no probe " | |
519 | "'%s'.", di->decoder->name, probe_id); | |
520 | g_free(new_probemap); | |
521 | return SRD_ERR_ARG; | |
522 | } | |
523 | } | |
524 | p = sl->data; | |
525 | new_probemap[p->order] = new_probenum; | |
526 | srd_dbg("Setting probe mapping: %s (index %d) = probe %d.", | |
527 | p->id, p->order, new_probenum); | |
528 | num_probes++; | |
529 | } | |
530 | di->data_unitsize = (num_probes + 7) / 8; | |
531 | ||
532 | srd_dbg("Final probe map:"); | |
533 | num_required_probes = g_slist_length(di->decoder->probes); | |
534 | for (i = 0; i < di->dec_num_probes; i++) { | |
535 | srd_dbg(" - index %d = probe %d (%s)", i, new_probemap[i], | |
536 | (i < num_required_probes) ? "required" : "optional"); | |
537 | } | |
538 | ||
539 | g_free(di->dec_probemap); | |
540 | di->dec_probemap = new_probemap; | |
541 | ||
542 | return SRD_OK; | |
543 | } | |
544 | ||
545 | /** | |
546 | * Create a new protocol decoder instance. | |
547 | * | |
548 | * @param sess The session holding the protocol decoder instance. | |
549 | * @param decoder_id Decoder 'id' field. | |
550 | * @param options GHashtable of options which override the defaults set in | |
551 | * the decoder class. May be NULL. | |
552 | * | |
553 | * @return Pointer to a newly allocated struct srd_decoder_inst, or | |
554 | * NULL in case of failure. | |
555 | * | |
556 | * @since 0.3.0 | |
557 | */ | |
558 | SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess, | |
559 | const char *decoder_id, GHashTable *options) | |
560 | { | |
561 | int i; | |
562 | struct srd_decoder *dec; | |
563 | struct srd_decoder_inst *di; | |
564 | char *inst_id; | |
565 | ||
566 | srd_dbg("Creating new %s instance.", decoder_id); | |
567 | ||
568 | if (session_is_valid(sess) != SRD_OK) { | |
569 | srd_err("Invalid session."); | |
570 | return NULL; | |
571 | } | |
572 | ||
573 | if (!(dec = srd_decoder_get_by_id(decoder_id))) { | |
574 | srd_err("Protocol decoder %s not found.", decoder_id); | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | if (!(di = g_try_malloc0(sizeof(struct srd_decoder_inst)))) { | |
579 | srd_err("Failed to g_malloc() instance."); | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | di->decoder = dec; | |
584 | di->sess = sess; | |
585 | if (options) { | |
586 | inst_id = g_hash_table_lookup(options, "id"); | |
587 | di->inst_id = g_strdup(inst_id ? inst_id : decoder_id); | |
588 | g_hash_table_remove(options, "id"); | |
589 | } else | |
590 | di->inst_id = g_strdup(decoder_id); | |
591 | ||
592 | /* | |
593 | * Prepare a default probe map, where samples come in the | |
594 | * order in which the decoder class defined them. | |
595 | */ | |
596 | di->dec_num_probes = g_slist_length(di->decoder->probes) + | |
597 | g_slist_length(di->decoder->opt_probes); | |
598 | if (di->dec_num_probes) { | |
599 | if (!(di->dec_probemap = | |
600 | g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
601 | srd_err("Failed to g_malloc() probe map."); | |
602 | g_free(di); | |
603 | return NULL; | |
604 | } | |
605 | for (i = 0; i < di->dec_num_probes; i++) | |
606 | di->dec_probemap[i] = i; | |
607 | } | |
608 | di->data_unitsize = (di->dec_num_probes + 7) / 8; | |
609 | ||
610 | /* Create a new instance of this decoder class. */ | |
611 | if (!(di->py_inst = PyObject_CallObject(dec->py_dec, NULL))) { | |
612 | if (PyErr_Occurred()) | |
613 | srd_exception_catch("failed to create %s instance: ", | |
614 | decoder_id); | |
615 | g_free(di->dec_probemap); | |
616 | g_free(di); | |
617 | return NULL; | |
618 | } | |
619 | ||
620 | if (options && srd_inst_option_set(di, options) != SRD_OK) { | |
621 | g_free(di->dec_probemap); | |
622 | g_free(di); | |
623 | return NULL; | |
624 | } | |
625 | ||
626 | /* Instance takes input from a frontend by default. */ | |
627 | sess->di_list = g_slist_append(sess->di_list, di); | |
628 | ||
629 | return di; | |
630 | } | |
631 | ||
632 | /** | |
633 | * Stack a decoder instance on top of another. | |
634 | * | |
635 | * @param sess The session holding the protocol decoder instances. | |
636 | * @param di_from The instance to move. | |
637 | * @param di_to The instance on top of which di_from will be stacked. | |
638 | * | |
639 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
640 | * | |
641 | * @since 0.3.0 | |
642 | */ | |
643 | SRD_API int srd_inst_stack(struct srd_session *sess, | |
644 | struct srd_decoder_inst *di_from, struct srd_decoder_inst *di_to) | |
645 | { | |
646 | ||
647 | if (session_is_valid(sess) != SRD_OK) { | |
648 | srd_err("Invalid session."); | |
649 | return SRD_ERR_ARG; | |
650 | } | |
651 | ||
652 | if (!di_from || !di_to) { | |
653 | srd_err("Invalid from/to instance pair."); | |
654 | return SRD_ERR_ARG; | |
655 | } | |
656 | ||
657 | if (g_slist_find(sess->di_list, di_to)) { | |
658 | /* Remove from the unstacked list. */ | |
659 | sess->di_list = g_slist_remove(sess->di_list, di_to); | |
660 | } | |
661 | ||
662 | /* Stack on top of source di. */ | |
663 | di_from->next_di = g_slist_append(di_from->next_di, di_to); | |
664 | ||
665 | return SRD_OK; | |
666 | } | |
667 | ||
668 | /** | |
669 | * Find a decoder instance by its instance ID. | |
670 | * | |
671 | * Only the bottom level of instances are searched -- instances already stacked | |
672 | * on top of another one will not be found. | |
673 | * | |
674 | * @param sess The session holding the protocol decoder instance. | |
675 | * @param inst_id The instance ID to be found. | |
676 | * | |
677 | * @return Pointer to struct srd_decoder_inst, or NULL if not found. | |
678 | * | |
679 | * @since 0.3.0 | |
680 | */ | |
681 | SRD_API struct srd_decoder_inst *srd_inst_find_by_id(struct srd_session *sess, | |
682 | const char *inst_id) | |
683 | { | |
684 | GSList *l; | |
685 | struct srd_decoder_inst *tmp, *di; | |
686 | ||
687 | if (session_is_valid(sess) != SRD_OK) { | |
688 | srd_err("Invalid session."); | |
689 | return NULL; | |
690 | } | |
691 | ||
692 | di = NULL; | |
693 | for (l = sess->di_list; l; l = l->next) { | |
694 | tmp = l->data; | |
695 | if (!strcmp(tmp->inst_id, inst_id)) { | |
696 | di = tmp; | |
697 | break; | |
698 | } | |
699 | } | |
700 | ||
701 | return di; | |
702 | } | |
703 | ||
704 | static struct srd_decoder_inst *srd_sess_inst_find_by_obj( | |
705 | struct srd_session *sess, const GSList *stack, | |
706 | const PyObject *obj) | |
707 | { | |
708 | const GSList *l; | |
709 | struct srd_decoder_inst *tmp, *di; | |
710 | ||
711 | if (session_is_valid(sess) != SRD_OK) { | |
712 | srd_err("Invalid session."); | |
713 | return NULL; | |
714 | } | |
715 | ||
716 | di = NULL; | |
717 | for (l = stack ? stack : sess->di_list; di == NULL && l != NULL; l = l->next) { | |
718 | tmp = l->data; | |
719 | if (tmp->py_inst == obj) | |
720 | di = tmp; | |
721 | else if (tmp->next_di) | |
722 | di = srd_sess_inst_find_by_obj(sess, tmp->next_di, obj); | |
723 | } | |
724 | ||
725 | return di; | |
726 | } | |
727 | ||
728 | /** | |
729 | * Find a decoder instance by its Python object. | |
730 | * | |
731 | * I.e. find that instance's instantiation of the sigrokdecode.Decoder class. | |
732 | * This will recurse to find the instance anywhere in the stack tree of all | |
733 | * sessions. | |
734 | * | |
735 | * @param stack Pointer to a GSList of struct srd_decoder_inst, indicating the | |
736 | * stack to search. To start searching at the bottom level of | |
737 | * decoder instances, pass NULL. | |
738 | * @param obj The Python class instantiation. | |
739 | * | |
740 | * @return Pointer to struct srd_decoder_inst, or NULL if not found. | |
741 | * | |
742 | * @private | |
743 | * | |
744 | * @since 0.1.0 | |
745 | */ | |
746 | SRD_PRIV struct srd_decoder_inst *srd_inst_find_by_obj(const GSList *stack, | |
747 | const PyObject *obj) | |
748 | { | |
749 | struct srd_decoder_inst *di; | |
750 | struct srd_session *sess; | |
751 | GSList *l; | |
752 | ||
753 | di = NULL; | |
754 | for (l = sessions; di == NULL && l != NULL; l = l->next) { | |
755 | sess = l->data; | |
756 | di = srd_sess_inst_find_by_obj(sess, stack, obj); | |
757 | } | |
758 | ||
759 | return di; | |
760 | } | |
761 | ||
762 | /** @private */ | |
763 | SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di) | |
764 | { | |
765 | PyObject *py_res; | |
766 | GSList *l; | |
767 | struct srd_decoder_inst *next_di; | |
768 | int ret; | |
769 | ||
770 | srd_dbg("Calling start() method on protocol decoder instance %s.", | |
771 | di->inst_id); | |
772 | ||
773 | if (!(py_res = PyObject_CallMethod(di->py_inst, "start", NULL))) { | |
774 | srd_exception_catch("Protocol decoder instance %s: ", | |
775 | di->inst_id); | |
776 | return SRD_ERR_PYTHON; | |
777 | } | |
778 | Py_DecRef(py_res); | |
779 | ||
780 | /* Start all the PDs stacked on top of this one. */ | |
781 | for (l = di->next_di; l; l = l->next) { | |
782 | next_di = l->data; | |
783 | if ((ret = srd_inst_start(next_di)) != SRD_OK) | |
784 | return ret; | |
785 | } | |
786 | ||
787 | return SRD_OK; | |
788 | } | |
789 | ||
790 | /** | |
791 | * Run the specified decoder function. | |
792 | * | |
793 | * @param di The decoder instance to call. Must not be NULL. | |
794 | * @param start_samplenum The starting sample number for the buffer's sample | |
795 | * set, relative to the start of capture. | |
796 | * @param end_samplenum The ending sample number for the buffer's sample | |
797 | * set, relative to the start of capture. | |
798 | * @param inbuf The buffer to decode. Must not be NULL. | |
799 | * @param inbuflen Length of the buffer. Must be > 0. | |
800 | * | |
801 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
802 | * | |
803 | * @private | |
804 | * | |
805 | * @since 0.1.0 | |
806 | */ | |
807 | SRD_PRIV int srd_inst_decode(const struct srd_decoder_inst *di, | |
808 | uint64_t start_samplenum, uint64_t end_samplenum, | |
809 | const uint8_t *inbuf, uint64_t inbuflen) | |
810 | { | |
811 | PyObject *py_res; | |
812 | srd_logic *logic; | |
813 | ||
814 | srd_dbg("Calling decode() on instance %s with %" PRIu64 " bytes " | |
815 | "starting at sample %" PRIu64 ".", di->inst_id, inbuflen, | |
816 | start_samplenum); | |
817 | ||
818 | /* Return an error upon unusable input. */ | |
819 | if (!di) { | |
820 | srd_dbg("empty decoder instance"); | |
821 | return SRD_ERR_ARG; | |
822 | } | |
823 | if (!inbuf) { | |
824 | srd_dbg("NULL buffer pointer"); | |
825 | return SRD_ERR_ARG; | |
826 | } | |
827 | if (inbuflen == 0) { | |
828 | srd_dbg("empty buffer"); | |
829 | return SRD_ERR_ARG; | |
830 | } | |
831 | ||
832 | /* | |
833 | * Create new srd_logic object. Each iteration around the PD's loop | |
834 | * will fill one sample into this object. | |
835 | */ | |
836 | logic = PyObject_New(srd_logic, &srd_logic_type); | |
837 | Py_INCREF(logic); | |
838 | logic->di = (struct srd_decoder_inst *)di; | |
839 | logic->start_samplenum = start_samplenum; | |
840 | logic->itercnt = 0; | |
841 | logic->inbuf = (uint8_t *)inbuf; | |
842 | logic->inbuflen = inbuflen; | |
843 | logic->sample = PyList_New(2); | |
844 | Py_INCREF(logic->sample); | |
845 | ||
846 | Py_IncRef(di->py_inst); | |
847 | if (!(py_res = PyObject_CallMethod(di->py_inst, "decode", | |
848 | "KKO", start_samplenum, end_samplenum, logic))) { | |
849 | srd_exception_catch("Protocol decoder instance %s: ", di->inst_id); | |
850 | return SRD_ERR_PYTHON; | |
851 | } | |
852 | Py_DecRef(py_res); | |
853 | ||
854 | return SRD_OK; | |
855 | } | |
856 | ||
857 | /** @private */ | |
858 | SRD_PRIV void srd_inst_free(struct srd_decoder_inst *di) | |
859 | { | |
860 | GSList *l; | |
861 | struct srd_pd_output *pdo; | |
862 | ||
863 | srd_dbg("Freeing instance %s", di->inst_id); | |
864 | ||
865 | Py_DecRef(di->py_inst); | |
866 | g_free(di->inst_id); | |
867 | g_free(di->dec_probemap); | |
868 | g_slist_free(di->next_di); | |
869 | for (l = di->pd_output; l; l = l->next) { | |
870 | pdo = l->data; | |
871 | g_free(pdo->proto_id); | |
872 | g_free(pdo); | |
873 | } | |
874 | g_slist_free(di->pd_output); | |
875 | g_free(di); | |
876 | } | |
877 | ||
878 | /** @private */ | |
879 | SRD_PRIV void srd_inst_free_all(struct srd_session *sess, GSList *stack) | |
880 | { | |
881 | GSList *l; | |
882 | struct srd_decoder_inst *di; | |
883 | ||
884 | if (session_is_valid(sess) != SRD_OK) { | |
885 | srd_err("Invalid session."); | |
886 | return; | |
887 | } | |
888 | ||
889 | di = NULL; | |
890 | for (l = stack ? stack : sess->di_list; di == NULL && l != NULL; l = l->next) { | |
891 | di = l->data; | |
892 | if (di->next_di) | |
893 | srd_inst_free_all(sess, di->next_di); | |
894 | srd_inst_free(di); | |
895 | } | |
896 | if (!stack) { | |
897 | g_slist_free(sess->di_list); | |
898 | sess->di_list = NULL; | |
899 | } | |
900 | } | |
901 | ||
902 | /** @} */ | |
903 | ||
904 | /** | |
905 | * @defgroup grp_session Session handling | |
906 | * | |
907 | * Starting and handling decoding sessions. | |
908 | * | |
909 | * @{ | |
910 | */ | |
911 | ||
912 | static int session_is_valid(struct srd_session *sess) | |
913 | { | |
914 | ||
915 | if (!sess || sess->session_id < 1) | |
916 | return SRD_ERR; | |
917 | ||
918 | return SRD_OK; | |
919 | } | |
920 | ||
921 | /** | |
922 | * Create a decoding session. | |
923 | * | |
924 | * A session holds all decoder instances, their stack relationships and | |
925 | * output callbacks. | |
926 | * | |
927 | * @param sess A pointer which will hold a pointer to a newly | |
928 | * initialized session on return. | |
929 | * | |
930 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
931 | * | |
932 | * @since 0.3.0 | |
933 | */ | |
934 | SRD_API int srd_session_new(struct srd_session **sess) | |
935 | { | |
936 | ||
937 | if (!sess) { | |
938 | srd_err("Invalid session pointer."); | |
939 | return SRD_ERR_ARG; | |
940 | } | |
941 | ||
942 | if (!(*sess = g_try_malloc(sizeof(struct srd_session)))) | |
943 | return SRD_ERR_MALLOC; | |
944 | (*sess)->session_id = ++max_session_id; | |
945 | (*sess)->di_list = (*sess)->callbacks = NULL; | |
946 | ||
947 | /* Keep a list of all sessions, so we can clean up as needed. */ | |
948 | sessions = g_slist_append(sessions, *sess); | |
949 | ||
950 | srd_dbg("Created session %d.", (*sess)->session_id); | |
951 | ||
952 | return SRD_OK; | |
953 | } | |
954 | ||
955 | /** | |
956 | * Start a decoding session. | |
957 | * | |
958 | * Decoders, instances and stack must have been prepared beforehand, | |
959 | * and all SRD_CONF parameters set. | |
960 | * | |
961 | * @param sess The session to start. | |
962 | * | |
963 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
964 | * | |
965 | * @since 0.3.0 | |
966 | */ | |
967 | SRD_API int srd_session_start(struct srd_session *sess) | |
968 | { | |
969 | GSList *d; | |
970 | struct srd_decoder_inst *di; | |
971 | int ret; | |
972 | ||
973 | if (session_is_valid(sess) != SRD_OK) { | |
974 | srd_err("Invalid session pointer."); | |
975 | return SRD_ERR; | |
976 | } | |
977 | ||
978 | srd_dbg("Calling start() on all instances in session %d.", sess->session_id); | |
979 | ||
980 | /* Run the start() method on all decoders receiving frontend data. */ | |
981 | ret = SRD_OK; | |
982 | for (d = sess->di_list; d; d = d->next) { | |
983 | di = d->data; | |
984 | if ((ret = srd_inst_start(di)) != SRD_OK) | |
985 | break; | |
986 | } | |
987 | ||
988 | return ret; | |
989 | } | |
990 | ||
991 | SRD_PRIV int srd_inst_send_meta(struct srd_decoder_inst *di, int key, | |
992 | GVariant *data) | |
993 | { | |
994 | PyObject *py_ret; | |
995 | ||
996 | if (key != SRD_CONF_SAMPLERATE) | |
997 | /* This is the only key we pass on to the decoder for now. */ | |
998 | return SRD_OK; | |
999 | ||
1000 | if (!PyObject_HasAttrString(di->py_inst, "metadata")) | |
1001 | /* This decoder doesn't want metadata, that's fine. */ | |
1002 | return SRD_OK; | |
1003 | ||
1004 | py_ret = PyObject_CallMethod(di->py_inst, "metadata", "lK", | |
1005 | (long)SRD_CONF_SAMPLERATE, | |
1006 | (unsigned long long)g_variant_get_uint64(data)); | |
1007 | Py_XDECREF(py_ret); | |
1008 | ||
1009 | return SRD_OK; | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * Set a metadata configuration key in a session. | |
1014 | * | |
1015 | * @param sess The session to configure. | |
1016 | * @param key The configuration key (SRD_CONF_*). | |
1017 | * @param data The new value for the key, as a GVariant with GVariantType | |
1018 | * appropriate to that key. A floating reference can be passed | |
1019 | * in; its refcount will be sunk and unreferenced after use. | |
1020 | * | |
1021 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
1022 | * | |
1023 | * @since 0.3.0 | |
1024 | */ | |
1025 | SRD_API int srd_session_metadata_set(struct srd_session *sess, int key, | |
1026 | GVariant *data) | |
1027 | { | |
1028 | GSList *l; | |
1029 | int ret; | |
1030 | ||
1031 | if (session_is_valid(sess) != SRD_OK) { | |
1032 | srd_err("Invalid session."); | |
1033 | return SRD_ERR_ARG; | |
1034 | } | |
1035 | ||
1036 | if (key != SRD_CONF_SAMPLERATE) { | |
1037 | srd_err("Unknown config key %d.", key); | |
1038 | return SRD_ERR_ARG; | |
1039 | } | |
1040 | ||
1041 | srd_dbg("Setting session %d samplerate to %"PRIu64".", | |
1042 | sess->session_id, g_variant_get_uint64(data)); | |
1043 | ||
1044 | ret = SRD_OK; | |
1045 | for (l = sess->di_list; l; l = l->next) { | |
1046 | if ((ret = srd_inst_send_meta(l->data, key, data)) != SRD_OK) | |
1047 | break; | |
1048 | } | |
1049 | ||
1050 | g_variant_unref(data); | |
1051 | ||
1052 | return ret; | |
1053 | } | |
1054 | ||
1055 | /** | |
1056 | * Send a chunk of logic sample data to a running decoder session. | |
1057 | * | |
1058 | * The logic samples must be arranged in probe order, in the least | |
1059 | * amount of space possible. If no probes were configured, the default | |
1060 | * probe set consists of all required probes + all optional probes. | |
1061 | * | |
1062 | * The size of a sample in inbuf is the minimum number of bytes needed | |
1063 | * to store the configured (or default) probes. | |
1064 | * | |
1065 | * @param sess The session to use. | |
1066 | * @param start_samplenum The sample number of the first sample in this chunk. | |
1067 | * @param end_samplenum The sample number of the last sample in this chunk. | |
1068 | * @param inbuf Pointer to sample data. | |
1069 | * @param inbuflen Length in bytes of the buffer. | |
1070 | * | |
1071 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
1072 | * | |
1073 | * @since 0.3.0 | |
1074 | */ | |
1075 | SRD_API int srd_session_send(struct srd_session *sess, | |
1076 | uint64_t start_samplenum, uint64_t end_samplenum, | |
1077 | const uint8_t *inbuf, uint64_t inbuflen) | |
1078 | { | |
1079 | GSList *d; | |
1080 | int ret; | |
1081 | ||
1082 | if (session_is_valid(sess) != SRD_OK) { | |
1083 | srd_err("Invalid session."); | |
1084 | return SRD_ERR_ARG; | |
1085 | } | |
1086 | ||
1087 | srd_dbg("Calling decode() on all instances with starting sample " | |
1088 | "number %" PRIu64 ", %" PRIu64 " bytes at 0x%p", | |
1089 | start_samplenum, inbuflen, inbuf); | |
1090 | ||
1091 | for (d = sess->di_list; d; d = d->next) { | |
1092 | if ((ret = srd_inst_decode(d->data, start_samplenum, | |
1093 | end_samplenum, inbuf, inbuflen)) != SRD_OK) | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | return SRD_OK; | |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * Destroy a decoding session. | |
1102 | * | |
1103 | * All decoder instances and output callbacks are properly released. | |
1104 | * | |
1105 | * @param sess The session to be destroyed. | |
1106 | * | |
1107 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
1108 | * | |
1109 | * @since 0.3.0 | |
1110 | */ | |
1111 | SRD_API int srd_session_destroy(struct srd_session *sess) | |
1112 | { | |
1113 | int session_id; | |
1114 | ||
1115 | if (!sess) { | |
1116 | srd_err("Invalid session."); | |
1117 | return SRD_ERR_ARG; | |
1118 | } | |
1119 | ||
1120 | session_id = sess->session_id; | |
1121 | if (sess->di_list) | |
1122 | srd_inst_free_all(sess, NULL); | |
1123 | if (sess->callbacks) | |
1124 | g_slist_free_full(sess->callbacks, g_free); | |
1125 | sessions = g_slist_remove(sessions, sess); | |
1126 | g_free(sess); | |
1127 | ||
1128 | srd_dbg("Destroyed session %d.", session_id); | |
1129 | ||
1130 | return SRD_OK; | |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * Register/add a decoder output callback function. | |
1135 | * | |
1136 | * The function will be called when a protocol decoder sends output back | |
1137 | * to the PD controller (except for Python objects, which only go up the | |
1138 | * stack). | |
1139 | * | |
1140 | * @param sess The output session in which to register the callback. | |
1141 | * @param output_type The output type this callback will receive. Only one | |
1142 | * callback per output type can be registered. | |
1143 | * @param cb The function to call. Must not be NULL. | |
1144 | * @param cb_data Private data for the callback function. Can be NULL. | |
1145 | * | |
1146 | * @since 0.3.0 | |
1147 | */ | |
1148 | SRD_API int srd_pd_output_callback_add(struct srd_session *sess, | |
1149 | int output_type, srd_pd_output_callback_t cb, void *cb_data) | |
1150 | { | |
1151 | struct srd_pd_callback *pd_cb; | |
1152 | ||
1153 | if (session_is_valid(sess) != SRD_OK) { | |
1154 | srd_err("Invalid session."); | |
1155 | return SRD_ERR_ARG; | |
1156 | } | |
1157 | ||
1158 | srd_dbg("Registering new callback for output type %d.", output_type); | |
1159 | ||
1160 | if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback)))) { | |
1161 | srd_err("Failed to g_malloc() struct srd_pd_callback."); | |
1162 | return SRD_ERR_MALLOC; | |
1163 | } | |
1164 | ||
1165 | pd_cb->output_type = output_type; | |
1166 | pd_cb->cb = cb; | |
1167 | pd_cb->cb_data = cb_data; | |
1168 | sess->callbacks = g_slist_append(sess->callbacks, pd_cb); | |
1169 | ||
1170 | return SRD_OK; | |
1171 | } | |
1172 | ||
1173 | /** @private */ | |
1174 | SRD_PRIV struct srd_pd_callback *srd_pd_output_callback_find( | |
1175 | struct srd_session *sess, int output_type) | |
1176 | { | |
1177 | GSList *l; | |
1178 | struct srd_pd_callback *tmp, *pd_cb; | |
1179 | ||
1180 | if (session_is_valid(sess) != SRD_OK) { | |
1181 | srd_err("Invalid session."); | |
1182 | return NULL; | |
1183 | } | |
1184 | ||
1185 | pd_cb = NULL; | |
1186 | for (l = sess->callbacks; l; l = l->next) { | |
1187 | tmp = l->data; | |
1188 | if (tmp->output_type == output_type) { | |
1189 | pd_cb = tmp; | |
1190 | break; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | return pd_cb; | |
1195 | } | |
1196 | ||
1197 | /* This is the backend function to Python sigrokdecode.add() call. */ | |
1198 | /** @private */ | |
1199 | SRD_PRIV int srd_inst_pd_output_add(struct srd_decoder_inst *di, | |
1200 | int output_type, const char *proto_id) | |
1201 | { | |
1202 | struct srd_pd_output *pdo; | |
1203 | ||
1204 | srd_dbg("Instance %s creating new output type %d for %s.", | |
1205 | di->inst_id, output_type, proto_id); | |
1206 | ||
1207 | if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) { | |
1208 | srd_err("Failed to g_malloc() struct srd_pd_output."); | |
1209 | return -1; | |
1210 | } | |
1211 | ||
1212 | /* pdo_id is just a simple index, nothing is deleted from this list anyway. */ | |
1213 | pdo->pdo_id = g_slist_length(di->pd_output); | |
1214 | pdo->output_type = output_type; | |
1215 | pdo->di = di; | |
1216 | pdo->proto_id = g_strdup(proto_id); | |
1217 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
1218 | ||
1219 | return pdo->pdo_id; | |
1220 | } | |
1221 | ||
1222 | /** @} */ |