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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 | /** @cond PRIVATE */ | |
30 | ||
31 | extern GSList *sessions; | |
32 | ||
33 | /* type_logic.c */ | |
34 | extern SRD_PRIV PyTypeObject srd_logic_type; | |
35 | ||
36 | /** @endcond */ | |
37 | ||
38 | /** | |
39 | * @file | |
40 | * | |
41 | * Decoder instance handling. | |
42 | */ | |
43 | ||
44 | /** | |
45 | * @defgroup grp_instances Decoder instances | |
46 | * | |
47 | * Decoder instance handling. | |
48 | * | |
49 | * @{ | |
50 | */ | |
51 | ||
52 | /** | |
53 | * Set one or more options in a decoder instance. | |
54 | * | |
55 | * Handled options are removed from the hash. | |
56 | * | |
57 | * @param di Decoder instance. | |
58 | * @param options A GHashTable of options to set. | |
59 | * | |
60 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
61 | * | |
62 | * @since 0.1.0 | |
63 | */ | |
64 | SRD_API int srd_inst_option_set(struct srd_decoder_inst *di, | |
65 | GHashTable *options) | |
66 | { | |
67 | PyObject *py_dec_options, *py_dec_optkeys, *py_di_options, *py_optval; | |
68 | PyObject *py_optlist, *py_classval; | |
69 | Py_UNICODE *py_ustr; | |
70 | GVariant *value; | |
71 | unsigned long long int val_ull; | |
72 | gint64 val_int; | |
73 | int num_optkeys, ret, size, i; | |
74 | const char *val_str; | |
75 | char *dbg, *key; | |
76 | ||
77 | if (!di) { | |
78 | srd_err("Invalid decoder instance."); | |
79 | return SRD_ERR_ARG; | |
80 | } | |
81 | ||
82 | if (!options) { | |
83 | srd_err("Invalid options GHashTable."); | |
84 | return SRD_ERR_ARG; | |
85 | } | |
86 | ||
87 | if (!PyObject_HasAttrString(di->decoder->py_dec, "options")) { | |
88 | /* Decoder has no options. */ | |
89 | if (g_hash_table_size(options) == 0) { | |
90 | /* No options provided. */ | |
91 | return SRD_OK; | |
92 | } else { | |
93 | srd_err("Protocol decoder has no options."); | |
94 | return SRD_ERR_ARG; | |
95 | } | |
96 | return SRD_OK; | |
97 | } | |
98 | ||
99 | ret = SRD_ERR_PYTHON; | |
100 | key = NULL; | |
101 | py_dec_options = py_dec_optkeys = py_di_options = py_optval = NULL; | |
102 | py_optlist = py_classval = NULL; | |
103 | py_dec_options = PyObject_GetAttrString(di->decoder->py_dec, "options"); | |
104 | ||
105 | /* All of these are synthesized objects, so they're good. */ | |
106 | py_dec_optkeys = PyDict_Keys(py_dec_options); | |
107 | num_optkeys = PyList_Size(py_dec_optkeys); | |
108 | ||
109 | /* | |
110 | * The 'options' dictionary is a class variable, but we need to | |
111 | * change it. Changing it directly will affect the entire class, | |
112 | * so we need to create a new object for it, and populate that | |
113 | * instead. | |
114 | */ | |
115 | if (!(py_di_options = PyObject_GetAttrString(di->py_inst, "options"))) | |
116 | goto err_out; | |
117 | Py_DECREF(py_di_options); | |
118 | py_di_options = PyDict_New(); | |
119 | PyObject_SetAttrString(di->py_inst, "options", py_di_options); | |
120 | for (i = 0; i < num_optkeys; i++) { | |
121 | /* Get the default class value for this option. */ | |
122 | py_str_as_str(PyList_GetItem(py_dec_optkeys, i), &key); | |
123 | if (!(py_optlist = PyDict_GetItemString(py_dec_options, key))) | |
124 | goto err_out; | |
125 | if (!(py_classval = PyList_GetItem(py_optlist, 1))) | |
126 | goto err_out; | |
127 | if (!PyUnicode_Check(py_classval) && !PyLong_Check(py_classval)) { | |
128 | srd_err("Options of type %s are not yet supported.", | |
129 | Py_TYPE(py_classval)->tp_name); | |
130 | goto err_out; | |
131 | } | |
132 | ||
133 | if ((value = g_hash_table_lookup(options, key))) { | |
134 | dbg = g_variant_print(value, TRUE); | |
135 | srd_dbg("got option '%s' = %s", key, dbg); | |
136 | g_free(dbg); | |
137 | /* An override for this option was provided. */ | |
138 | if (PyUnicode_Check(py_classval)) { | |
139 | if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING)) { | |
140 | srd_err("Option '%s' requires a string value.", key); | |
141 | goto err_out; | |
142 | } | |
143 | val_str = g_variant_get_string(value, NULL); | |
144 | if (!(py_optval = PyUnicode_FromString(val_str))) { | |
145 | /* Some UTF-8 encoding error. */ | |
146 | PyErr_Clear(); | |
147 | srd_err("Option '%s' requires a UTF-8 string value.", key); | |
148 | goto err_out; | |
149 | } | |
150 | } else if (PyLong_Check(py_classval)) { | |
151 | if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT64)) { | |
152 | srd_err("Option '%s' requires an integer value.", key); | |
153 | goto err_out; | |
154 | } | |
155 | val_int = g_variant_get_int64(value); | |
156 | if (!(py_optval = PyLong_FromLong(val_int))) { | |
157 | /* ValueError Exception */ | |
158 | PyErr_Clear(); | |
159 | srd_err("Option '%s' has invalid integer value.", key); | |
160 | goto err_out; | |
161 | } | |
162 | } | |
163 | g_hash_table_remove(options, key); | |
164 | } else { | |
165 | /* Use the class default for this option. */ | |
166 | if (PyUnicode_Check(py_classval)) { | |
167 | /* Make a brand new copy of the string. */ | |
168 | py_ustr = PyUnicode_AS_UNICODE(py_classval); | |
169 | size = PyUnicode_GET_SIZE(py_classval); | |
170 | py_optval = PyUnicode_FromUnicode(py_ustr, size); | |
171 | } else if (PyLong_Check(py_classval)) { | |
172 | /* Make a brand new copy of the integer. */ | |
173 | val_ull = PyLong_AsUnsignedLongLong(py_classval); | |
174 | if (val_ull == (unsigned long long)-1) { | |
175 | /* OverFlowError exception */ | |
176 | PyErr_Clear(); | |
177 | srd_err("Invalid integer value for %s: " | |
178 | "expected integer.", key); | |
179 | goto err_out; | |
180 | } | |
181 | if (!(py_optval = PyLong_FromUnsignedLongLong(val_ull))) | |
182 | goto err_out; | |
183 | } | |
184 | } | |
185 | ||
186 | /* | |
187 | * If we got here, py_optval holds a known good new reference | |
188 | * to the instance option to set. | |
189 | */ | |
190 | if (PyDict_SetItemString(py_di_options, key, py_optval) == -1) | |
191 | goto err_out; | |
192 | g_free(key); | |
193 | key = NULL; | |
194 | } | |
195 | ||
196 | ret = SRD_OK; | |
197 | ||
198 | err_out: | |
199 | Py_XDECREF(py_di_options); | |
200 | Py_XDECREF(py_dec_optkeys); | |
201 | Py_XDECREF(py_dec_options); | |
202 | g_free(key); | |
203 | if (PyErr_Occurred()) { | |
204 | srd_exception_catch("Stray exception in srd_inst_option_set()."); | |
205 | ret = SRD_ERR_PYTHON; | |
206 | } | |
207 | ||
208 | return ret; | |
209 | } | |
210 | ||
211 | /* Helper GComparefunc for g_slist_find_custom() in srd_inst_probe_set_all() */ | |
212 | static gint compare_probe_id(const struct srd_probe *a, const char *probe_id) | |
213 | { | |
214 | return strcmp(a->id, probe_id); | |
215 | } | |
216 | ||
217 | /** | |
218 | * Set all probes in a decoder instance. | |
219 | * | |
220 | * This function sets _all_ probes for the specified decoder instance, i.e., | |
221 | * it overwrites any probes that were already defined (if any). | |
222 | * | |
223 | * @param di Decoder instance. | |
224 | * @param new_probes A GHashTable of probes to set. Key is probe name, value is | |
225 | * the probe number. Samples passed to this instance will be | |
226 | * arranged in this order. | |
227 | * | |
228 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
229 | * | |
230 | * @since 0.1.0 | |
231 | */ | |
232 | SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di, | |
233 | GHashTable *new_probes) | |
234 | { | |
235 | GVariant *probe_val; | |
236 | GList *l; | |
237 | GSList *sl; | |
238 | struct srd_probe *p; | |
239 | int *new_probemap, new_probenum, num_required_probes, num_probes, i; | |
240 | char *probe_id; | |
241 | ||
242 | srd_dbg("set probes called for instance %s with list of %d probes", | |
243 | di->inst_id, g_hash_table_size(new_probes)); | |
244 | ||
245 | if (g_hash_table_size(new_probes) == 0) | |
246 | /* No probes provided. */ | |
247 | return SRD_OK; | |
248 | ||
249 | if (di->dec_num_probes == 0) { | |
250 | /* Decoder has no probes. */ | |
251 | srd_err("Protocol decoder %s has no probes to define.", | |
252 | di->decoder->name); | |
253 | return SRD_ERR_ARG; | |
254 | } | |
255 | ||
256 | new_probemap = NULL; | |
257 | ||
258 | if (!(new_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
259 | srd_err("Failed to g_malloc() new probe map."); | |
260 | return SRD_ERR_MALLOC; | |
261 | } | |
262 | ||
263 | /* | |
264 | * For now, map all indexes to probe -1 (can be overridden later). | |
265 | * This -1 is interpreted as an unspecified probe later. | |
266 | */ | |
267 | for (i = 0; i < di->dec_num_probes; i++) | |
268 | new_probemap[i] = -1; | |
269 | ||
270 | num_probes = 0; | |
271 | for (l = g_hash_table_get_keys(new_probes); l; l = l->next) { | |
272 | probe_id = l->data; | |
273 | probe_val = g_hash_table_lookup(new_probes, probe_id); | |
274 | if (!g_variant_is_of_type(probe_val, G_VARIANT_TYPE_INT32)) { | |
275 | /* Probe name was specified without a value. */ | |
276 | srd_err("No probe number was specified for %s.", | |
277 | probe_id); | |
278 | g_free(new_probemap); | |
279 | return SRD_ERR_ARG; | |
280 | } | |
281 | new_probenum = g_variant_get_int32(probe_val); | |
282 | if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id, | |
283 | (GCompareFunc)compare_probe_id))) { | |
284 | /* Fall back on optional probes. */ | |
285 | if (!(sl = g_slist_find_custom(di->decoder->opt_probes, | |
286 | probe_id, (GCompareFunc) compare_probe_id))) { | |
287 | srd_err("Protocol decoder %s has no probe " | |
288 | "'%s'.", di->decoder->name, probe_id); | |
289 | g_free(new_probemap); | |
290 | return SRD_ERR_ARG; | |
291 | } | |
292 | } | |
293 | p = sl->data; | |
294 | new_probemap[p->order] = new_probenum; | |
295 | srd_dbg("Setting probe mapping: %s (index %d) = probe %d.", | |
296 | p->id, p->order, new_probenum); | |
297 | num_probes++; | |
298 | } | |
299 | di->data_unitsize = (num_probes + 7) / 8; | |
300 | ||
301 | srd_dbg("Final probe map:"); | |
302 | num_required_probes = g_slist_length(di->decoder->probes); | |
303 | for (i = 0; i < di->dec_num_probes; i++) { | |
304 | srd_dbg(" - index %d = probe %d (%s)", i, new_probemap[i], | |
305 | (i < num_required_probes) ? "required" : "optional"); | |
306 | } | |
307 | ||
308 | /* Report an error if not all required probes were specified. */ | |
309 | for (i = 0; i < num_required_probes; i++) { | |
310 | if (new_probemap[i] != -1) | |
311 | continue; | |
312 | p = g_slist_nth(di->decoder->probes, i)->data; | |
313 | srd_err("Required probe '%s' (index %d) was not specified.", | |
314 | p->id, i); | |
315 | return SRD_ERR; | |
316 | } | |
317 | ||
318 | g_free(di->dec_probemap); | |
319 | di->dec_probemap = new_probemap; | |
320 | ||
321 | return SRD_OK; | |
322 | } | |
323 | ||
324 | /** | |
325 | * Create a new protocol decoder instance. | |
326 | * | |
327 | * @param sess The session holding the protocol decoder instance. | |
328 | * @param decoder_id Decoder 'id' field. | |
329 | * @param options GHashtable of options which override the defaults set in | |
330 | * the decoder class. May be NULL. | |
331 | * | |
332 | * @return Pointer to a newly allocated struct srd_decoder_inst, or | |
333 | * NULL in case of failure. | |
334 | * | |
335 | * @since 0.3.0 | |
336 | */ | |
337 | SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess, | |
338 | const char *decoder_id, GHashTable *options) | |
339 | { | |
340 | int i; | |
341 | struct srd_decoder *dec; | |
342 | struct srd_decoder_inst *di; | |
343 | char *inst_id; | |
344 | ||
345 | srd_dbg("Creating new %s instance.", decoder_id); | |
346 | ||
347 | if (session_is_valid(sess) != SRD_OK) { | |
348 | srd_err("Invalid session."); | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | if (!(dec = srd_decoder_get_by_id(decoder_id))) { | |
353 | srd_err("Protocol decoder %s not found.", decoder_id); | |
354 | return NULL; | |
355 | } | |
356 | ||
357 | if (!(di = g_try_malloc0(sizeof(struct srd_decoder_inst)))) { | |
358 | srd_err("Failed to g_malloc() instance."); | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | di->decoder = dec; | |
363 | di->sess = sess; | |
364 | if (options) { | |
365 | inst_id = g_hash_table_lookup(options, "id"); | |
366 | di->inst_id = g_strdup(inst_id ? inst_id : decoder_id); | |
367 | g_hash_table_remove(options, "id"); | |
368 | } else | |
369 | di->inst_id = g_strdup(decoder_id); | |
370 | ||
371 | /* | |
372 | * Prepare a default probe map, where samples come in the | |
373 | * order in which the decoder class defined them. | |
374 | */ | |
375 | di->dec_num_probes = g_slist_length(di->decoder->probes) + | |
376 | g_slist_length(di->decoder->opt_probes); | |
377 | if (di->dec_num_probes) { | |
378 | if (!(di->dec_probemap = | |
379 | g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
380 | srd_err("Failed to g_malloc() probe map."); | |
381 | g_free(di); | |
382 | return NULL; | |
383 | } | |
384 | for (i = 0; i < di->dec_num_probes; i++) | |
385 | di->dec_probemap[i] = i; | |
386 | di->data_unitsize = (di->dec_num_probes + 7) / 8; | |
387 | /* | |
388 | * Will be used to prepare a sample at every iteration | |
389 | * of the instance's decode() method. | |
390 | */ | |
391 | if (!(di->probe_samples = g_try_malloc(di->dec_num_probes))) { | |
392 | srd_err("Failed to g_malloc() sample buffer."); | |
393 | g_free(di->dec_probemap); | |
394 | g_free(di); | |
395 | return NULL; | |
396 | } | |
397 | } | |
398 | ||
399 | /* Create a new instance of this decoder class. */ | |
400 | if (!(di->py_inst = PyObject_CallObject(dec->py_dec, NULL))) { | |
401 | if (PyErr_Occurred()) | |
402 | srd_exception_catch("failed to create %s instance: ", | |
403 | decoder_id); | |
404 | g_free(di->dec_probemap); | |
405 | g_free(di); | |
406 | return NULL; | |
407 | } | |
408 | ||
409 | if (options && srd_inst_option_set(di, options) != SRD_OK) { | |
410 | g_free(di->dec_probemap); | |
411 | g_free(di); | |
412 | return NULL; | |
413 | } | |
414 | ||
415 | /* Instance takes input from a frontend by default. */ | |
416 | sess->di_list = g_slist_append(sess->di_list, di); | |
417 | ||
418 | return di; | |
419 | } | |
420 | ||
421 | /** | |
422 | * Stack a decoder instance on top of another. | |
423 | * | |
424 | * @param sess The session holding the protocol decoder instances. | |
425 | * @param di_bottom The instance on top of which di_top will be stacked. | |
426 | * @param di_top The instance to go on top. | |
427 | * | |
428 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
429 | * | |
430 | * @since 0.3.0 | |
431 | */ | |
432 | SRD_API int srd_inst_stack(struct srd_session *sess, | |
433 | struct srd_decoder_inst *di_bottom, | |
434 | struct srd_decoder_inst *di_top) | |
435 | { | |
436 | ||
437 | if (session_is_valid(sess) != SRD_OK) { | |
438 | srd_err("Invalid session."); | |
439 | return SRD_ERR_ARG; | |
440 | } | |
441 | ||
442 | if (!di_bottom || !di_top) { | |
443 | srd_err("Invalid from/to instance pair."); | |
444 | return SRD_ERR_ARG; | |
445 | } | |
446 | ||
447 | if (g_slist_find(sess->di_list, di_top)) { | |
448 | /* Remove from the unstacked list. */ | |
449 | sess->di_list = g_slist_remove(sess->di_list, di_top); | |
450 | } | |
451 | ||
452 | /* Stack on top of source di. */ | |
453 | di_bottom->next_di = g_slist_append(di_bottom->next_di, di_top); | |
454 | ||
455 | srd_dbg("Stacked %s on top of %s.", di_top->inst_id, di_bottom->inst_id); | |
456 | ||
457 | return SRD_OK; | |
458 | } | |
459 | ||
460 | /** | |
461 | * Find a decoder instance by its instance ID. | |
462 | * | |
463 | * Only the bottom level of instances are searched -- instances already stacked | |
464 | * on top of another one will not be found. | |
465 | * | |
466 | * @param sess The session holding the protocol decoder instance. | |
467 | * @param inst_id The instance ID to be found. | |
468 | * | |
469 | * @return Pointer to struct srd_decoder_inst, or NULL if not found. | |
470 | * | |
471 | * @since 0.3.0 | |
472 | */ | |
473 | SRD_API struct srd_decoder_inst *srd_inst_find_by_id(struct srd_session *sess, | |
474 | const char *inst_id) | |
475 | { | |
476 | GSList *l; | |
477 | struct srd_decoder_inst *tmp, *di; | |
478 | ||
479 | if (session_is_valid(sess) != SRD_OK) { | |
480 | srd_err("Invalid session."); | |
481 | return NULL; | |
482 | } | |
483 | ||
484 | di = NULL; | |
485 | for (l = sess->di_list; l; l = l->next) { | |
486 | tmp = l->data; | |
487 | if (!strcmp(tmp->inst_id, inst_id)) { | |
488 | di = tmp; | |
489 | break; | |
490 | } | |
491 | } | |
492 | ||
493 | return di; | |
494 | } | |
495 | ||
496 | static struct srd_decoder_inst *srd_sess_inst_find_by_obj( | |
497 | struct srd_session *sess, const GSList *stack, | |
498 | const PyObject *obj) | |
499 | { | |
500 | const GSList *l; | |
501 | struct srd_decoder_inst *tmp, *di; | |
502 | ||
503 | if (session_is_valid(sess) != SRD_OK) { | |
504 | srd_err("Invalid session."); | |
505 | return NULL; | |
506 | } | |
507 | ||
508 | di = NULL; | |
509 | for (l = stack ? stack : sess->di_list; di == NULL && l != NULL; l = l->next) { | |
510 | tmp = l->data; | |
511 | if (tmp->py_inst == obj) | |
512 | di = tmp; | |
513 | else if (tmp->next_di) | |
514 | di = srd_sess_inst_find_by_obj(sess, tmp->next_di, obj); | |
515 | } | |
516 | ||
517 | return di; | |
518 | } | |
519 | ||
520 | /** | |
521 | * Find a decoder instance by its Python object. | |
522 | * | |
523 | * I.e. find that instance's instantiation of the sigrokdecode.Decoder class. | |
524 | * This will recurse to find the instance anywhere in the stack tree of all | |
525 | * sessions. | |
526 | * | |
527 | * @param stack Pointer to a GSList of struct srd_decoder_inst, indicating the | |
528 | * stack to search. To start searching at the bottom level of | |
529 | * decoder instances, pass NULL. | |
530 | * @param obj The Python class instantiation. | |
531 | * | |
532 | * @return Pointer to struct srd_decoder_inst, or NULL if not found. | |
533 | * | |
534 | * @private | |
535 | * | |
536 | * @since 0.1.0 | |
537 | */ | |
538 | SRD_PRIV struct srd_decoder_inst *srd_inst_find_by_obj(const GSList *stack, | |
539 | const PyObject *obj) | |
540 | { | |
541 | struct srd_decoder_inst *di; | |
542 | struct srd_session *sess; | |
543 | GSList *l; | |
544 | ||
545 | di = NULL; | |
546 | for (l = sessions; di == NULL && l != NULL; l = l->next) { | |
547 | sess = l->data; | |
548 | di = srd_sess_inst_find_by_obj(sess, stack, obj); | |
549 | } | |
550 | ||
551 | return di; | |
552 | } | |
553 | ||
554 | /** @private */ | |
555 | SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di) | |
556 | { | |
557 | PyObject *py_res; | |
558 | GSList *l; | |
559 | struct srd_decoder_inst *next_di; | |
560 | int ret; | |
561 | ||
562 | srd_dbg("Calling start() method on protocol decoder instance %s.", | |
563 | di->inst_id); | |
564 | ||
565 | if (!(py_res = PyObject_CallMethod(di->py_inst, "start", NULL))) { | |
566 | srd_exception_catch("Protocol decoder instance %s: ", | |
567 | di->inst_id); | |
568 | return SRD_ERR_PYTHON; | |
569 | } | |
570 | Py_DecRef(py_res); | |
571 | ||
572 | /* Start all the PDs stacked on top of this one. */ | |
573 | for (l = di->next_di; l; l = l->next) { | |
574 | next_di = l->data; | |
575 | if ((ret = srd_inst_start(next_di)) != SRD_OK) | |
576 | return ret; | |
577 | } | |
578 | ||
579 | return SRD_OK; | |
580 | } | |
581 | ||
582 | /** | |
583 | * Run the specified decoder function. | |
584 | * | |
585 | * @param di The decoder instance to call. Must not be NULL. | |
586 | * @param start_samplenum The starting sample number for the buffer's sample | |
587 | * set, relative to the start of capture. | |
588 | * @param end_samplenum The ending sample number for the buffer's sample | |
589 | * set, relative to the start of capture. | |
590 | * @param inbuf The buffer to decode. Must not be NULL. | |
591 | * @param inbuflen Length of the buffer. Must be > 0. | |
592 | * | |
593 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
594 | * | |
595 | * @private | |
596 | * | |
597 | * @since 0.1.0 | |
598 | */ | |
599 | SRD_PRIV int srd_inst_decode(const struct srd_decoder_inst *di, | |
600 | uint64_t start_samplenum, uint64_t end_samplenum, | |
601 | const uint8_t *inbuf, uint64_t inbuflen) | |
602 | { | |
603 | PyObject *py_res; | |
604 | srd_logic *logic; | |
605 | ||
606 | srd_dbg("Calling decode() on instance %s with %" PRIu64 " bytes " | |
607 | "starting at sample %" PRIu64 ".", di->inst_id, inbuflen, | |
608 | start_samplenum); | |
609 | ||
610 | /* Return an error upon unusable input. */ | |
611 | if (!di) { | |
612 | srd_dbg("empty decoder instance"); | |
613 | return SRD_ERR_ARG; | |
614 | } | |
615 | if (!inbuf) { | |
616 | srd_dbg("NULL buffer pointer"); | |
617 | return SRD_ERR_ARG; | |
618 | } | |
619 | if (inbuflen == 0) { | |
620 | srd_dbg("empty buffer"); | |
621 | return SRD_ERR_ARG; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Create new srd_logic object. Each iteration around the PD's loop | |
626 | * will fill one sample into this object. | |
627 | */ | |
628 | logic = PyObject_New(srd_logic, &srd_logic_type); | |
629 | Py_INCREF(logic); | |
630 | logic->di = (struct srd_decoder_inst *)di; | |
631 | logic->start_samplenum = start_samplenum; | |
632 | logic->itercnt = 0; | |
633 | logic->inbuf = (uint8_t *)inbuf; | |
634 | logic->inbuflen = inbuflen; | |
635 | logic->sample = PyList_New(2); | |
636 | Py_INCREF(logic->sample); | |
637 | ||
638 | Py_IncRef(di->py_inst); | |
639 | if (!(py_res = PyObject_CallMethod(di->py_inst, "decode", | |
640 | "KKO", start_samplenum, end_samplenum, logic))) { | |
641 | srd_exception_catch("Protocol decoder instance %s: ", di->inst_id); | |
642 | return SRD_ERR_PYTHON; | |
643 | } | |
644 | Py_DecRef(py_res); | |
645 | ||
646 | return SRD_OK; | |
647 | } | |
648 | ||
649 | /** @private */ | |
650 | SRD_PRIV void srd_inst_free(struct srd_decoder_inst *di) | |
651 | { | |
652 | GSList *l; | |
653 | struct srd_pd_output *pdo; | |
654 | ||
655 | srd_dbg("Freeing instance %s", di->inst_id); | |
656 | ||
657 | Py_DecRef(di->py_inst); | |
658 | g_free(di->inst_id); | |
659 | g_free(di->dec_probemap); | |
660 | g_slist_free(di->next_di); | |
661 | for (l = di->pd_output; l; l = l->next) { | |
662 | pdo = l->data; | |
663 | g_free(pdo->proto_id); | |
664 | g_free(pdo); | |
665 | } | |
666 | g_slist_free(di->pd_output); | |
667 | g_free(di); | |
668 | } | |
669 | ||
670 | /** @private */ | |
671 | SRD_PRIV void srd_inst_free_all(struct srd_session *sess, GSList *stack) | |
672 | { | |
673 | GSList *l; | |
674 | struct srd_decoder_inst *di; | |
675 | ||
676 | if (session_is_valid(sess) != SRD_OK) { | |
677 | srd_err("Invalid session."); | |
678 | return; | |
679 | } | |
680 | ||
681 | di = NULL; | |
682 | for (l = stack ? stack : sess->di_list; di == NULL && l != NULL; l = l->next) { | |
683 | di = l->data; | |
684 | if (di->next_di) | |
685 | srd_inst_free_all(sess, di->next_di); | |
686 | srd_inst_free(di); | |
687 | } | |
688 | if (!stack) { | |
689 | g_slist_free(sess->di_list); | |
690 | sess->di_list = NULL; | |
691 | } | |
692 | } | |
693 | ||
694 | /** @} */ | |
695 |