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