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1 | /* | |
2 | * This file is part of the libsigrokdecode project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
5 | * | |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include "libsigrokdecode.h" | |
23 | #include <inttypes.h> | |
24 | ||
25 | /** @cond PRIVATE */ | |
26 | extern SRD_PRIV GSList *sessions; | |
27 | /** @endcond */ | |
28 | ||
29 | typedef struct { | |
30 | PyObject_HEAD | |
31 | } srd_Decoder; | |
32 | ||
33 | /* This is only used for nicer srd_dbg() output. */ | |
34 | static const char *output_type_name(unsigned int idx) | |
35 | { | |
36 | static const char names[][16] = { | |
37 | "OUTPUT_ANN", | |
38 | "OUTPUT_PYTHON", | |
39 | "OUTPUT_BINARY", | |
40 | "OUTPUT_META", | |
41 | "(invalid)" | |
42 | }; | |
43 | ||
44 | return names[MIN(idx, G_N_ELEMENTS(names) - 1)]; | |
45 | } | |
46 | ||
47 | static void release_annotation(struct srd_proto_data_annotation *pda) | |
48 | { | |
49 | if (!pda) | |
50 | return; | |
51 | if (pda->ann_text) | |
52 | g_strfreev(pda->ann_text); | |
53 | } | |
54 | ||
55 | static int convert_annotation(struct srd_decoder_inst *di, PyObject *obj, | |
56 | struct srd_proto_data *pdata) | |
57 | { | |
58 | PyObject *py_tmp; | |
59 | struct srd_pd_output *pdo; | |
60 | struct srd_proto_data_annotation *pda; | |
61 | int ann_class; | |
62 | char **ann_text; | |
63 | PyGILState_STATE gstate; | |
64 | ||
65 | gstate = PyGILState_Ensure(); | |
66 | ||
67 | /* Should be a list of [annotation class, [string, ...]]. */ | |
68 | if (!PyList_Check(obj)) { | |
69 | srd_err("Protocol decoder %s submitted an annotation that" | |
70 | " is not a list", di->decoder->name); | |
71 | goto err; | |
72 | } | |
73 | ||
74 | /* Should have 2 elements. */ | |
75 | if (PyList_Size(obj) != 2) { | |
76 | srd_err("Protocol decoder %s submitted annotation list with " | |
77 | "%zd elements instead of 2", di->decoder->name, | |
78 | PyList_Size(obj)); | |
79 | goto err; | |
80 | } | |
81 | ||
82 | /* | |
83 | * The first element should be an integer matching a previously | |
84 | * registered annotation class. | |
85 | */ | |
86 | py_tmp = PyList_GetItem(obj, 0); | |
87 | if (!PyLong_Check(py_tmp)) { | |
88 | srd_err("Protocol decoder %s submitted annotation list, but " | |
89 | "first element was not an integer.", di->decoder->name); | |
90 | goto err; | |
91 | } | |
92 | ann_class = PyLong_AsLong(py_tmp); | |
93 | if (!(pdo = g_slist_nth_data(di->decoder->annotations, ann_class))) { | |
94 | srd_err("Protocol decoder %s submitted data to unregistered " | |
95 | "annotation class %d.", di->decoder->name, ann_class); | |
96 | goto err; | |
97 | } | |
98 | ||
99 | /* Second element must be a list. */ | |
100 | py_tmp = PyList_GetItem(obj, 1); | |
101 | if (!PyList_Check(py_tmp)) { | |
102 | srd_err("Protocol decoder %s submitted annotation list, but " | |
103 | "second element was not a list.", di->decoder->name); | |
104 | goto err; | |
105 | } | |
106 | if (py_strseq_to_char(py_tmp, &ann_text) != SRD_OK) { | |
107 | srd_err("Protocol decoder %s submitted annotation list, but " | |
108 | "second element was malformed.", di->decoder->name); | |
109 | goto err; | |
110 | } | |
111 | ||
112 | pda = pdata->data; | |
113 | pda->ann_class = ann_class; | |
114 | pda->ann_text = ann_text; | |
115 | ||
116 | PyGILState_Release(gstate); | |
117 | ||
118 | return SRD_OK; | |
119 | ||
120 | err: | |
121 | PyGILState_Release(gstate); | |
122 | ||
123 | return SRD_ERR_PYTHON; | |
124 | } | |
125 | ||
126 | static void release_binary(struct srd_proto_data_binary *pdb) | |
127 | { | |
128 | if (!pdb) | |
129 | return; | |
130 | g_free((void *)pdb->data); | |
131 | g_free(pdb); | |
132 | } | |
133 | ||
134 | static int convert_binary(struct srd_decoder_inst *di, PyObject *obj, | |
135 | struct srd_proto_data *pdata) | |
136 | { | |
137 | struct srd_proto_data_binary *pdb; | |
138 | PyObject *py_tmp; | |
139 | Py_ssize_t size; | |
140 | int bin_class; | |
141 | char *class_name, *buf; | |
142 | PyGILState_STATE gstate; | |
143 | ||
144 | gstate = PyGILState_Ensure(); | |
145 | ||
146 | /* Should be a list of [binary class, bytes]. */ | |
147 | if (!PyList_Check(obj)) { | |
148 | srd_err("Protocol decoder %s submitted non-list for SRD_OUTPUT_BINARY.", | |
149 | di->decoder->name); | |
150 | goto err; | |
151 | } | |
152 | ||
153 | /* Should have 2 elements. */ | |
154 | if (PyList_Size(obj) != 2) { | |
155 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list " | |
156 | "with %zd elements instead of 2", di->decoder->name, | |
157 | PyList_Size(obj)); | |
158 | goto err; | |
159 | } | |
160 | ||
161 | /* The first element should be an integer. */ | |
162 | py_tmp = PyList_GetItem(obj, 0); | |
163 | if (!PyLong_Check(py_tmp)) { | |
164 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, " | |
165 | "but first element was not an integer.", di->decoder->name); | |
166 | goto err; | |
167 | } | |
168 | bin_class = PyLong_AsLong(py_tmp); | |
169 | if (!(class_name = g_slist_nth_data(di->decoder->binary, bin_class))) { | |
170 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY with " | |
171 | "unregistered binary class %d.", di->decoder->name, bin_class); | |
172 | goto err; | |
173 | } | |
174 | ||
175 | /* Second element should be bytes. */ | |
176 | py_tmp = PyList_GetItem(obj, 1); | |
177 | if (!PyBytes_Check(py_tmp)) { | |
178 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, " | |
179 | "but second element was not bytes.", di->decoder->name); | |
180 | goto err; | |
181 | } | |
182 | ||
183 | /* Consider an empty set of bytes a bug. */ | |
184 | if (PyBytes_Size(py_tmp) == 0) { | |
185 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY " | |
186 | "with empty data set.", di->decoder->name); | |
187 | goto err; | |
188 | } | |
189 | ||
190 | if (PyBytes_AsStringAndSize(py_tmp, &buf, &size) == -1) | |
191 | goto err; | |
192 | ||
193 | PyGILState_Release(gstate); | |
194 | ||
195 | pdb = g_malloc(sizeof(struct srd_proto_data_binary)); | |
196 | pdb->bin_class = bin_class; | |
197 | pdb->size = size; | |
198 | if (!(pdb->data = g_try_malloc(pdb->size))) { | |
199 | g_free(pdb); | |
200 | return SRD_ERR_MALLOC; | |
201 | } | |
202 | memcpy((void *)pdb->data, (const void *)buf, pdb->size); | |
203 | pdata->data = pdb; | |
204 | ||
205 | return SRD_OK; | |
206 | ||
207 | err: | |
208 | PyGILState_Release(gstate); | |
209 | ||
210 | return SRD_ERR_PYTHON; | |
211 | } | |
212 | ||
213 | static inline struct srd_decoder_inst *srd_sess_inst_find_by_obj( | |
214 | struct srd_session *sess, const GSList *stack, const PyObject *obj) | |
215 | { | |
216 | const GSList *l; | |
217 | struct srd_decoder_inst *tmp, *di; | |
218 | ||
219 | if (!sess) | |
220 | return NULL; | |
221 | ||
222 | di = NULL; | |
223 | for (l = stack ? stack : sess->di_list; di == NULL && l != NULL; l = l->next) { | |
224 | tmp = l->data; | |
225 | if (tmp->py_inst == obj) | |
226 | di = tmp; | |
227 | else if (tmp->next_di) | |
228 | di = srd_sess_inst_find_by_obj(sess, tmp->next_di, obj); | |
229 | } | |
230 | ||
231 | return di; | |
232 | } | |
233 | ||
234 | /** | |
235 | * Find a decoder instance by its Python object. | |
236 | * | |
237 | * I.e. find that instance's instantiation of the sigrokdecode.Decoder class. | |
238 | * This will recurse to find the instance anywhere in the stack tree of all | |
239 | * sessions. | |
240 | * | |
241 | * @param stack Pointer to a GSList of struct srd_decoder_inst, indicating the | |
242 | * stack to search. To start searching at the bottom level of | |
243 | * decoder instances, pass NULL. | |
244 | * @param obj The Python class instantiation. | |
245 | * | |
246 | * @return Pointer to struct srd_decoder_inst, or NULL if not found. | |
247 | * | |
248 | * @since 0.1.0 | |
249 | */ | |
250 | static inline struct srd_decoder_inst *srd_inst_find_by_obj( | |
251 | const GSList *stack, const PyObject *obj) | |
252 | { | |
253 | struct srd_decoder_inst *di; | |
254 | struct srd_session *sess; | |
255 | GSList *l; | |
256 | ||
257 | /* Performance shortcut: Handle the most common case first. */ | |
258 | sess = sessions->data; | |
259 | di = sess->di_list->data; | |
260 | if (di->py_inst == obj) | |
261 | return di; | |
262 | ||
263 | di = NULL; | |
264 | for (l = sessions; di == NULL && l != NULL; l = l->next) { | |
265 | sess = l->data; | |
266 | di = srd_sess_inst_find_by_obj(sess, stack, obj); | |
267 | } | |
268 | ||
269 | return di; | |
270 | } | |
271 | ||
272 | static int convert_meta(struct srd_proto_data *pdata, PyObject *obj) | |
273 | { | |
274 | long long intvalue; | |
275 | double dvalue; | |
276 | PyGILState_STATE gstate; | |
277 | ||
278 | gstate = PyGILState_Ensure(); | |
279 | ||
280 | if (g_variant_type_equal(pdata->pdo->meta_type, G_VARIANT_TYPE_INT64)) { | |
281 | if (!PyLong_Check(obj)) { | |
282 | PyErr_Format(PyExc_TypeError, "This output was registered " | |
283 | "as 'int', but something else was passed."); | |
284 | goto err; | |
285 | } | |
286 | intvalue = PyLong_AsLongLong(obj); | |
287 | if (PyErr_Occurred()) | |
288 | goto err; | |
289 | pdata->data = g_variant_new_int64(intvalue); | |
290 | } else if (g_variant_type_equal(pdata->pdo->meta_type, G_VARIANT_TYPE_DOUBLE)) { | |
291 | if (!PyFloat_Check(obj)) { | |
292 | PyErr_Format(PyExc_TypeError, "This output was registered " | |
293 | "as 'float', but something else was passed."); | |
294 | goto err; | |
295 | } | |
296 | dvalue = PyFloat_AsDouble(obj); | |
297 | if (PyErr_Occurred()) | |
298 | goto err; | |
299 | pdata->data = g_variant_new_double(dvalue); | |
300 | } | |
301 | ||
302 | PyGILState_Release(gstate); | |
303 | ||
304 | return SRD_OK; | |
305 | ||
306 | err: | |
307 | PyGILState_Release(gstate); | |
308 | ||
309 | return SRD_ERR_PYTHON; | |
310 | } | |
311 | ||
312 | static void release_meta(GVariant *gvar) | |
313 | { | |
314 | if (!gvar) | |
315 | return; | |
316 | g_variant_unref(gvar); | |
317 | } | |
318 | ||
319 | static PyObject *Decoder_put(PyObject *self, PyObject *args) | |
320 | { | |
321 | GSList *l; | |
322 | PyObject *py_data, *py_res; | |
323 | struct srd_decoder_inst *di, *next_di; | |
324 | struct srd_pd_output *pdo; | |
325 | struct srd_proto_data pdata; | |
326 | struct srd_proto_data_annotation pda; | |
327 | uint64_t start_sample, end_sample; | |
328 | int output_id; | |
329 | struct srd_pd_callback *cb; | |
330 | PyGILState_STATE gstate; | |
331 | ||
332 | py_data = NULL; | |
333 | ||
334 | gstate = PyGILState_Ensure(); | |
335 | ||
336 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
337 | /* Shouldn't happen. */ | |
338 | srd_dbg("put(): self instance not found."); | |
339 | goto err; | |
340 | } | |
341 | ||
342 | if (!PyArg_ParseTuple(args, "KKiO", &start_sample, &end_sample, | |
343 | &output_id, &py_data)) { | |
344 | /* | |
345 | * This throws an exception, but by returning NULL here we let | |
346 | * Python raise it. This results in a much better trace in | |
347 | * controller.c on the decode() method call. | |
348 | */ | |
349 | goto err; | |
350 | } | |
351 | ||
352 | if (!(l = g_slist_nth(di->pd_output, output_id))) { | |
353 | srd_err("Protocol decoder %s submitted invalid output ID %d.", | |
354 | di->decoder->name, output_id); | |
355 | goto err; | |
356 | } | |
357 | pdo = l->data; | |
358 | ||
359 | srd_spew("Instance %s put %" PRIu64 "-%" PRIu64 " %s on oid %d.", | |
360 | di->inst_id, start_sample, end_sample, | |
361 | output_type_name(pdo->output_type), output_id); | |
362 | ||
363 | pdata.start_sample = start_sample; | |
364 | pdata.end_sample = end_sample; | |
365 | pdata.pdo = pdo; | |
366 | pdata.data = NULL; | |
367 | ||
368 | switch (pdo->output_type) { | |
369 | case SRD_OUTPUT_ANN: | |
370 | /* Annotations are only fed to callbacks. */ | |
371 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
372 | pdata.data = &pda; | |
373 | /* Convert from PyDict to srd_proto_data_annotation. */ | |
374 | if (convert_annotation(di, py_data, &pdata) != SRD_OK) { | |
375 | /* An error was already logged. */ | |
376 | break; | |
377 | } | |
378 | Py_BEGIN_ALLOW_THREADS | |
379 | cb->cb(&pdata, cb->cb_data); | |
380 | Py_END_ALLOW_THREADS | |
381 | release_annotation(pdata.data); | |
382 | } | |
383 | break; | |
384 | case SRD_OUTPUT_PYTHON: | |
385 | for (l = di->next_di; l; l = l->next) { | |
386 | next_di = l->data; | |
387 | srd_spew("Sending %" PRIu64 "-%" PRIu64 " to instance %s", | |
388 | start_sample, end_sample, next_di->inst_id); | |
389 | if (!(py_res = PyObject_CallMethod( | |
390 | next_di->py_inst, "decode", "KKO", start_sample, | |
391 | end_sample, py_data))) { | |
392 | srd_exception_catch("Calling %s decode() failed", | |
393 | next_di->inst_id); | |
394 | } | |
395 | Py_XDECREF(py_res); | |
396 | } | |
397 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
398 | /* | |
399 | * Frontends aren't really supposed to get Python | |
400 | * callbacks, but it's useful for testing. | |
401 | */ | |
402 | pdata.data = py_data; | |
403 | cb->cb(&pdata, cb->cb_data); | |
404 | } | |
405 | break; | |
406 | case SRD_OUTPUT_BINARY: | |
407 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
408 | /* Convert from PyDict to srd_proto_data_binary. */ | |
409 | if (convert_binary(di, py_data, &pdata) != SRD_OK) { | |
410 | /* An error was already logged. */ | |
411 | break; | |
412 | } | |
413 | Py_BEGIN_ALLOW_THREADS | |
414 | cb->cb(&pdata, cb->cb_data); | |
415 | Py_END_ALLOW_THREADS | |
416 | release_binary(pdata.data); | |
417 | } | |
418 | break; | |
419 | case SRD_OUTPUT_META: | |
420 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
421 | /* Annotations need converting from PyObject. */ | |
422 | if (convert_meta(&pdata, py_data) != SRD_OK) { | |
423 | /* An exception was already set up. */ | |
424 | break; | |
425 | } | |
426 | Py_BEGIN_ALLOW_THREADS | |
427 | cb->cb(&pdata, cb->cb_data); | |
428 | Py_END_ALLOW_THREADS | |
429 | release_meta(pdata.data); | |
430 | } | |
431 | break; | |
432 | default: | |
433 | srd_err("Protocol decoder %s submitted invalid output type %d.", | |
434 | di->decoder->name, pdo->output_type); | |
435 | break; | |
436 | } | |
437 | ||
438 | PyGILState_Release(gstate); | |
439 | ||
440 | Py_RETURN_NONE; | |
441 | ||
442 | err: | |
443 | PyGILState_Release(gstate); | |
444 | ||
445 | return NULL; | |
446 | } | |
447 | ||
448 | static PyObject *Decoder_register(PyObject *self, PyObject *args, | |
449 | PyObject *kwargs) | |
450 | { | |
451 | struct srd_decoder_inst *di; | |
452 | struct srd_pd_output *pdo; | |
453 | PyObject *py_new_output_id; | |
454 | PyTypeObject *meta_type_py; | |
455 | const GVariantType *meta_type_gv; | |
456 | int output_type; | |
457 | char *proto_id, *meta_name, *meta_descr; | |
458 | char *keywords[] = { "output_type", "proto_id", "meta", NULL }; | |
459 | PyGILState_STATE gstate; | |
460 | gboolean is_meta; | |
461 | GSList *l; | |
462 | struct srd_pd_output *cmp; | |
463 | ||
464 | gstate = PyGILState_Ensure(); | |
465 | ||
466 | meta_type_py = NULL; | |
467 | meta_type_gv = NULL; | |
468 | meta_name = meta_descr = NULL; | |
469 | ||
470 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
471 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
472 | goto err; | |
473 | } | |
474 | ||
475 | /* Default to instance ID, which defaults to class ID. */ | |
476 | proto_id = di->inst_id; | |
477 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i|s(Oss)", keywords, | |
478 | &output_type, &proto_id, | |
479 | &meta_type_py, &meta_name, &meta_descr)) { | |
480 | /* Let Python raise this exception. */ | |
481 | goto err; | |
482 | } | |
483 | ||
484 | /* Check if the meta value's type is supported. */ | |
485 | is_meta = output_type == SRD_OUTPUT_META; | |
486 | if (is_meta) { | |
487 | if (meta_type_py == &PyLong_Type) | |
488 | meta_type_gv = G_VARIANT_TYPE_INT64; | |
489 | else if (meta_type_py == &PyFloat_Type) | |
490 | meta_type_gv = G_VARIANT_TYPE_DOUBLE; | |
491 | else { | |
492 | PyErr_Format(PyExc_TypeError, "Unsupported type."); | |
493 | goto err; | |
494 | } | |
495 | } | |
496 | ||
497 | pdo = NULL; | |
498 | for (l = di->pd_output; l; l = l->next) { | |
499 | cmp = l->data; | |
500 | if (cmp->output_type != output_type) | |
501 | continue; | |
502 | if (strcmp(cmp->proto_id, proto_id) != 0) | |
503 | continue; | |
504 | if (is_meta && cmp->meta_type != meta_type_gv) | |
505 | continue; | |
506 | if (is_meta && strcmp(cmp->meta_name, meta_name) != 0) | |
507 | continue; | |
508 | if (is_meta && strcmp(cmp->meta_descr, meta_descr) != 0) | |
509 | continue; | |
510 | pdo = cmp; | |
511 | break; | |
512 | } | |
513 | if (pdo) { | |
514 | py_new_output_id = Py_BuildValue("i", pdo->pdo_id); | |
515 | PyGILState_Release(gstate); | |
516 | return py_new_output_id; | |
517 | } | |
518 | ||
519 | srd_dbg("Instance %s creating new output type %d for %s.", | |
520 | di->inst_id, output_type, proto_id); | |
521 | ||
522 | pdo = g_malloc(sizeof(struct srd_pd_output)); | |
523 | ||
524 | /* pdo_id is just a simple index, nothing is deleted from this list anyway. */ | |
525 | pdo->pdo_id = g_slist_length(di->pd_output); | |
526 | pdo->output_type = output_type; | |
527 | pdo->di = di; | |
528 | pdo->proto_id = g_strdup(proto_id); | |
529 | ||
530 | if (output_type == SRD_OUTPUT_META) { | |
531 | pdo->meta_type = meta_type_gv; | |
532 | pdo->meta_name = g_strdup(meta_name); | |
533 | pdo->meta_descr = g_strdup(meta_descr); | |
534 | } | |
535 | ||
536 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
537 | py_new_output_id = Py_BuildValue("i", pdo->pdo_id); | |
538 | ||
539 | PyGILState_Release(gstate); | |
540 | ||
541 | return py_new_output_id; | |
542 | ||
543 | err: | |
544 | PyGILState_Release(gstate); | |
545 | ||
546 | return NULL; | |
547 | } | |
548 | ||
549 | static int get_term_type(const char *v) | |
550 | { | |
551 | switch (v[0]) { | |
552 | case 'h': | |
553 | return SRD_TERM_HIGH; | |
554 | case 'l': | |
555 | return SRD_TERM_LOW; | |
556 | case 'r': | |
557 | return SRD_TERM_RISING_EDGE; | |
558 | case 'f': | |
559 | return SRD_TERM_FALLING_EDGE; | |
560 | case 'e': | |
561 | return SRD_TERM_EITHER_EDGE; | |
562 | case 'n': | |
563 | return SRD_TERM_NO_EDGE; | |
564 | default: | |
565 | return -1; | |
566 | } | |
567 | ||
568 | return -1; | |
569 | } | |
570 | ||
571 | /** | |
572 | * Get the pin values at the current sample number. | |
573 | * | |
574 | * @param di The decoder instance to use. Must not be NULL. | |
575 | * The number of channels must be >= 1. | |
576 | * | |
577 | * @return A newly allocated PyTuple containing the pin values at the | |
578 | * current sample number. | |
579 | */ | |
580 | static PyObject *get_current_pinvalues(const struct srd_decoder_inst *di) | |
581 | { | |
582 | int i; | |
583 | uint8_t sample; | |
584 | const uint8_t *sample_pos; | |
585 | int byte_offset, bit_offset; | |
586 | PyObject *py_pinvalues; | |
587 | PyGILState_STATE gstate; | |
588 | ||
589 | if (!di) { | |
590 | srd_err("Invalid decoder instance."); | |
591 | return NULL; | |
592 | } | |
593 | ||
594 | gstate = PyGILState_Ensure(); | |
595 | ||
596 | py_pinvalues = PyTuple_New(di->dec_num_channels); | |
597 | ||
598 | for (i = 0; i < di->dec_num_channels; i++) { | |
599 | /* A channelmap value of -1 means "unused optional channel". */ | |
600 | if (di->dec_channelmap[i] == -1) { | |
601 | /* Value of unused channel is 0xff, instead of 0 or 1. */ | |
602 | PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(0xff)); | |
603 | } else { | |
604 | sample_pos = di->inbuf + ((di->abs_cur_samplenum - di->abs_start_samplenum) * di->data_unitsize); | |
605 | byte_offset = di->dec_channelmap[i] / 8; | |
606 | bit_offset = di->dec_channelmap[i] % 8; | |
607 | sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0; | |
608 | PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(sample)); | |
609 | } | |
610 | } | |
611 | ||
612 | PyGILState_Release(gstate); | |
613 | ||
614 | return py_pinvalues; | |
615 | } | |
616 | ||
617 | /** | |
618 | * Create a list of terms in the specified condition. | |
619 | * | |
620 | * If there are no terms in the condition, 'term_list' will be NULL. | |
621 | * | |
622 | * @param py_dict A Python dict containing terms. Must not be NULL. | |
623 | * @param term_list Pointer to a GSList which will be set to the newly | |
624 | * created list of terms. Must not be NULL. | |
625 | * | |
626 | * @return SRD_OK upon success, a negative error code otherwise. | |
627 | */ | |
628 | static int create_term_list(PyObject *py_dict, GSList **term_list) | |
629 | { | |
630 | Py_ssize_t pos = 0; | |
631 | PyObject *py_key, *py_value; | |
632 | struct srd_term *term; | |
633 | uint64_t num_samples_to_skip; | |
634 | char *term_str; | |
635 | PyGILState_STATE gstate; | |
636 | ||
637 | if (!py_dict || !term_list) | |
638 | return SRD_ERR_ARG; | |
639 | ||
640 | /* "Create" an empty GSList of terms. */ | |
641 | *term_list = NULL; | |
642 | ||
643 | gstate = PyGILState_Ensure(); | |
644 | ||
645 | /* Iterate over all items in the current dict. */ | |
646 | while (PyDict_Next(py_dict, &pos, &py_key, &py_value)) { | |
647 | /* Check whether the current key is a string or a number. */ | |
648 | if (PyLong_Check(py_key)) { | |
649 | /* The key is a number. */ | |
650 | /* TODO: Check if the number is a valid channel. */ | |
651 | /* Get the value string. */ | |
652 | if ((py_pydictitem_as_str(py_dict, py_key, &term_str)) != SRD_OK) { | |
653 | srd_err("Failed to get the value."); | |
654 | goto err; | |
655 | } | |
656 | term = g_malloc(sizeof(struct srd_term)); | |
657 | term->type = get_term_type(term_str); | |
658 | term->channel = PyLong_AsLong(py_key); | |
659 | g_free(term_str); | |
660 | } else if (PyUnicode_Check(py_key)) { | |
661 | /* The key is a string. */ | |
662 | /* TODO: Check if it's "skip". */ | |
663 | if ((py_pydictitem_as_long(py_dict, py_key, &num_samples_to_skip)) != SRD_OK) { | |
664 | srd_err("Failed to get number of samples to skip."); | |
665 | goto err; | |
666 | } | |
667 | term = g_malloc(sizeof(struct srd_term)); | |
668 | term->type = SRD_TERM_SKIP; | |
669 | term->num_samples_to_skip = num_samples_to_skip; | |
670 | term->num_samples_already_skipped = 0; | |
671 | } else { | |
672 | srd_err("Term key is neither a string nor a number."); | |
673 | goto err; | |
674 | } | |
675 | ||
676 | /* Add the term to the list of terms. */ | |
677 | *term_list = g_slist_append(*term_list, term); | |
678 | } | |
679 | ||
680 | PyGILState_Release(gstate); | |
681 | ||
682 | return SRD_OK; | |
683 | ||
684 | err: | |
685 | PyGILState_Release(gstate); | |
686 | ||
687 | return SRD_ERR; | |
688 | } | |
689 | ||
690 | /** | |
691 | * Replace the current condition list with the new one. | |
692 | * | |
693 | * @param self TODO. Must not be NULL. | |
694 | * @param args TODO. Must not be NULL. | |
695 | * | |
696 | * @retval SRD_OK The new condition list was set successfully. | |
697 | * @retval SRD_ERR There was an error setting the new condition list. | |
698 | * The contents of di->condition_list are undefined. | |
699 | * @retval 9999 TODO. | |
700 | */ | |
701 | static int set_new_condition_list(PyObject *self, PyObject *args) | |
702 | { | |
703 | struct srd_decoder_inst *di; | |
704 | GSList *term_list; | |
705 | PyObject *py_conditionlist, *py_conds, *py_dict; | |
706 | int i, num_conditions, ret; | |
707 | PyGILState_STATE gstate; | |
708 | ||
709 | if (!self || !args) | |
710 | return SRD_ERR_ARG; | |
711 | ||
712 | gstate = PyGILState_Ensure(); | |
713 | ||
714 | /* Get the decoder instance. */ | |
715 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
716 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
717 | goto err; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Return an error condition from .wait() when termination is | |
722 | * requested, such that decode() will terminate. | |
723 | */ | |
724 | if (di->want_wait_terminate) { | |
725 | srd_dbg("%s: %s: Skip (want_term).", di->inst_id, __func__); | |
726 | goto err; | |
727 | } | |
728 | ||
729 | /* | |
730 | * Parse the argument of self.wait() into 'py_conds', and check | |
731 | * the data type. The argument is optional, None is assumed in | |
732 | * its absence. None or an empty dict or an empty list mean that | |
733 | * there is no condition, and the next available sample shall | |
734 | * get returned to the caller. | |
735 | */ | |
736 | py_conds = Py_None; | |
737 | if (!PyArg_ParseTuple(args, "|O", &py_conds)) { | |
738 | /* Let Python raise this exception. */ | |
739 | goto err; | |
740 | } | |
741 | if (py_conds == Py_None) { | |
742 | /* 'py_conds' is None. */ | |
743 | goto ret_9999; | |
744 | } else if (PyList_Check(py_conds)) { | |
745 | /* 'py_conds' is a list. */ | |
746 | py_conditionlist = py_conds; | |
747 | num_conditions = PyList_Size(py_conditionlist); | |
748 | if (num_conditions == 0) | |
749 | goto ret_9999; /* The PD invoked self.wait([]). */ | |
750 | Py_IncRef(py_conditionlist); | |
751 | } else if (PyDict_Check(py_conds)) { | |
752 | /* 'py_conds' is a dict. */ | |
753 | if (PyDict_Size(py_conds) == 0) | |
754 | goto ret_9999; /* The PD invoked self.wait({}). */ | |
755 | /* Make a list and put the dict in there for convenience. */ | |
756 | py_conditionlist = PyList_New(1); | |
757 | Py_IncRef(py_conds); | |
758 | PyList_SetItem(py_conditionlist, 0, py_conds); | |
759 | num_conditions = 1; | |
760 | } else { | |
761 | srd_err("Condition list is neither a list nor a dict."); | |
762 | goto err; | |
763 | } | |
764 | ||
765 | /* Free the old condition list. */ | |
766 | condition_list_free(di); | |
767 | ||
768 | ret = SRD_OK; | |
769 | ||
770 | /* Iterate over the conditions, set di->condition_list accordingly. */ | |
771 | for (i = 0; i < num_conditions; i++) { | |
772 | /* Get a condition (dict) from the condition list. */ | |
773 | py_dict = PyList_GetItem(py_conditionlist, i); | |
774 | if (!PyDict_Check(py_dict)) { | |
775 | srd_err("Condition is not a dict."); | |
776 | ret = SRD_ERR; | |
777 | break; | |
778 | } | |
779 | ||
780 | /* Create the list of terms in this condition. */ | |
781 | if ((ret = create_term_list(py_dict, &term_list)) < 0) | |
782 | break; | |
783 | ||
784 | /* Add the new condition to the PD instance's condition list. */ | |
785 | di->condition_list = g_slist_append(di->condition_list, term_list); | |
786 | } | |
787 | ||
788 | Py_DecRef(py_conditionlist); | |
789 | ||
790 | PyGILState_Release(gstate); | |
791 | ||
792 | return ret; | |
793 | ||
794 | err: | |
795 | PyGILState_Release(gstate); | |
796 | ||
797 | return SRD_ERR; | |
798 | ||
799 | ret_9999: | |
800 | PyGILState_Release(gstate); | |
801 | ||
802 | return 9999; | |
803 | } | |
804 | ||
805 | /** | |
806 | * Create a SKIP condition list for condition-less .wait() calls. | |
807 | * | |
808 | * @param di Decoder instance. | |
809 | * @param count Number of samples to skip. | |
810 | * | |
811 | * @retval SRD_OK The new condition list was set successfully. | |
812 | * @retval SRD_ERR There was an error setting the new condition list. | |
813 | * The contents of di->condition_list are undefined. | |
814 | * | |
815 | * This routine is a reduced and specialized version of the @ref | |
816 | * set_new_condition_list() and @ref create_term_list() routines which | |
817 | * gets invoked when .wait() was called without specifications for | |
818 | * conditions. This minor duplication of the SKIP term list creation | |
819 | * simplifies the logic and avoids the creation of expensive Python | |
820 | * objects with "constant" values which the caller did not pass in the | |
821 | * first place. It results in maximum sharing of match handling code | |
822 | * paths. | |
823 | */ | |
824 | static int set_skip_condition(struct srd_decoder_inst *di, uint64_t count) | |
825 | { | |
826 | struct srd_term *term; | |
827 | GSList *term_list; | |
828 | ||
829 | condition_list_free(di); | |
830 | term = g_malloc(sizeof(*term)); | |
831 | term->type = SRD_TERM_SKIP; | |
832 | term->num_samples_to_skip = count; | |
833 | term->num_samples_already_skipped = 0; | |
834 | term_list = g_slist_append(NULL, term); | |
835 | di->condition_list = g_slist_append(di->condition_list, term_list); | |
836 | ||
837 | return SRD_OK; | |
838 | } | |
839 | ||
840 | static PyObject *Decoder_wait(PyObject *self, PyObject *args) | |
841 | { | |
842 | int ret; | |
843 | uint64_t skip_count; | |
844 | unsigned int i; | |
845 | gboolean found_match; | |
846 | struct srd_decoder_inst *di; | |
847 | PyObject *py_pinvalues, *py_matched; | |
848 | PyGILState_STATE gstate; | |
849 | ||
850 | if (!self || !args) | |
851 | return NULL; | |
852 | ||
853 | gstate = PyGILState_Ensure(); | |
854 | ||
855 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
856 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
857 | PyGILState_Release(gstate); | |
858 | Py_RETURN_NONE; | |
859 | } | |
860 | ||
861 | ret = set_new_condition_list(self, args); | |
862 | if (ret < 0) { | |
863 | srd_dbg("%s: %s: Aborting wait().", di->inst_id, __func__); | |
864 | goto err; | |
865 | } | |
866 | if (ret == 9999) { | |
867 | /* | |
868 | * Empty condition list, automatic match. Arrange for the | |
869 | * execution of regular match handling code paths such that | |
870 | * the next available sample is returned to the caller. | |
871 | * Make sure to skip one sample when "anywhere within the | |
872 | * stream", yet make sure to not skip sample number 0. | |
873 | */ | |
874 | if (di->abs_cur_samplenum) | |
875 | skip_count = 1; | |
876 | else if (!di->condition_list) | |
877 | skip_count = 0; | |
878 | else | |
879 | skip_count = 1; | |
880 | ret = set_skip_condition(di, skip_count); | |
881 | if (ret < 0) { | |
882 | srd_dbg("%s: %s: Cannot setup condition-less wait().", | |
883 | di->inst_id, __func__); | |
884 | goto err; | |
885 | } | |
886 | } | |
887 | ||
888 | while (1) { | |
889 | ||
890 | Py_BEGIN_ALLOW_THREADS | |
891 | ||
892 | /* Wait for new samples to process, or termination request. */ | |
893 | g_mutex_lock(&di->data_mutex); | |
894 | while (!di->got_new_samples && !di->want_wait_terminate) | |
895 | g_cond_wait(&di->got_new_samples_cond, &di->data_mutex); | |
896 | ||
897 | /* | |
898 | * Check whether any of the current condition(s) match. | |
899 | * Arrange for termination requests to take a code path which | |
900 | * won't find new samples to process, pretends to have processed | |
901 | * previously stored samples, and returns to the main thread, | |
902 | * while the termination request still gets signalled. | |
903 | */ | |
904 | found_match = FALSE; | |
905 | ||
906 | /* Ignore return value for now, should never be negative. */ | |
907 | (void)process_samples_until_condition_match(di, &found_match); | |
908 | ||
909 | Py_END_ALLOW_THREADS | |
910 | ||
911 | /* If there's a match, set self.samplenum etc. and return. */ | |
912 | if (found_match) { | |
913 | /* Set self.samplenum to the (absolute) sample number that matched. */ | |
914 | PyObject_SetAttrString(di->py_inst, "samplenum", | |
915 | PyLong_FromLong(di->abs_cur_samplenum)); | |
916 | ||
917 | if (di->match_array && di->match_array->len > 0) { | |
918 | py_matched = PyTuple_New(di->match_array->len); | |
919 | for (i = 0; i < di->match_array->len; i++) | |
920 | PyTuple_SetItem(py_matched, i, PyBool_FromLong(di->match_array->data[i])); | |
921 | PyObject_SetAttrString(di->py_inst, "matched", py_matched); | |
922 | match_array_free(di); | |
923 | } else { | |
924 | PyObject_SetAttrString(di->py_inst, "matched", Py_None); | |
925 | } | |
926 | ||
927 | py_pinvalues = get_current_pinvalues(di); | |
928 | ||
929 | g_mutex_unlock(&di->data_mutex); | |
930 | ||
931 | PyGILState_Release(gstate); | |
932 | ||
933 | return py_pinvalues; | |
934 | } | |
935 | ||
936 | /* No match, reset state for the next chunk. */ | |
937 | di->got_new_samples = FALSE; | |
938 | di->handled_all_samples = TRUE; | |
939 | di->abs_start_samplenum = 0; | |
940 | di->abs_end_samplenum = 0; | |
941 | di->inbuf = NULL; | |
942 | di->inbuflen = 0; | |
943 | ||
944 | /* Signal the main thread that we handled all samples. */ | |
945 | g_cond_signal(&di->handled_all_samples_cond); | |
946 | ||
947 | /* | |
948 | * When termination of wait() and decode() was requested, | |
949 | * then exit the loop after releasing the mutex. | |
950 | */ | |
951 | if (di->want_wait_terminate) { | |
952 | srd_dbg("%s: %s: Will return from wait().", | |
953 | di->inst_id, __func__); | |
954 | g_mutex_unlock(&di->data_mutex); | |
955 | goto err; | |
956 | } | |
957 | ||
958 | g_mutex_unlock(&di->data_mutex); | |
959 | } | |
960 | ||
961 | PyGILState_Release(gstate); | |
962 | ||
963 | Py_RETURN_NONE; | |
964 | ||
965 | err: | |
966 | PyGILState_Release(gstate); | |
967 | ||
968 | return NULL; | |
969 | } | |
970 | ||
971 | /** | |
972 | * Return whether the specified channel was supplied to the decoder. | |
973 | * | |
974 | * @param self TODO. Must not be NULL. | |
975 | * @param args TODO. Must not be NULL. | |
976 | * | |
977 | * @retval Py_True The channel has been supplied by the frontend. | |
978 | * @retval Py_False The channel has been supplied by the frontend. | |
979 | * @retval NULL An error occurred. | |
980 | */ | |
981 | static PyObject *Decoder_has_channel(PyObject *self, PyObject *args) | |
982 | { | |
983 | int idx, count; | |
984 | struct srd_decoder_inst *di; | |
985 | PyGILState_STATE gstate; | |
986 | ||
987 | if (!self || !args) | |
988 | return NULL; | |
989 | ||
990 | gstate = PyGILState_Ensure(); | |
991 | ||
992 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
993 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
994 | goto err; | |
995 | } | |
996 | ||
997 | /* | |
998 | * Get the integer argument of self.has_channel(). Check for | |
999 | * the range of supported PD input channel numbers. | |
1000 | */ | |
1001 | if (!PyArg_ParseTuple(args, "i", &idx)) { | |
1002 | /* Let Python raise this exception. */ | |
1003 | goto err; | |
1004 | } | |
1005 | ||
1006 | count = g_slist_length(di->decoder->channels) + | |
1007 | g_slist_length(di->decoder->opt_channels); | |
1008 | if (idx < 0 || idx >= count) { | |
1009 | srd_err("Invalid index %d, PD channel count %d.", idx, count); | |
1010 | PyErr_SetString(PyExc_IndexError, "invalid channel index"); | |
1011 | goto err; | |
1012 | } | |
1013 | ||
1014 | PyGILState_Release(gstate); | |
1015 | ||
1016 | return (di->dec_channelmap[idx] == -1) ? Py_False : Py_True; | |
1017 | ||
1018 | err: | |
1019 | PyGILState_Release(gstate); | |
1020 | ||
1021 | return NULL; | |
1022 | } | |
1023 | ||
1024 | static PyMethodDef Decoder_methods[] = { | |
1025 | { "put", Decoder_put, METH_VARARGS, | |
1026 | "Accepts a dictionary with the following keys: startsample, endsample, data" }, | |
1027 | { "register", (PyCFunction)Decoder_register, METH_VARARGS|METH_KEYWORDS, | |
1028 | "Register a new output stream" }, | |
1029 | { "wait", Decoder_wait, METH_VARARGS, | |
1030 | "Wait for one or more conditions to occur" }, | |
1031 | { "has_channel", Decoder_has_channel, METH_VARARGS, | |
1032 | "Report whether a channel was supplied" }, | |
1033 | {NULL, NULL, 0, NULL} | |
1034 | }; | |
1035 | ||
1036 | /** | |
1037 | * Create the sigrokdecode.Decoder type. | |
1038 | * | |
1039 | * @return The new type object. | |
1040 | * | |
1041 | * @private | |
1042 | */ | |
1043 | SRD_PRIV PyObject *srd_Decoder_type_new(void) | |
1044 | { | |
1045 | PyType_Spec spec; | |
1046 | PyType_Slot slots[] = { | |
1047 | { Py_tp_doc, "sigrok Decoder base class" }, | |
1048 | { Py_tp_methods, Decoder_methods }, | |
1049 | { Py_tp_new, (void *)&PyType_GenericNew }, | |
1050 | { 0, NULL } | |
1051 | }; | |
1052 | PyObject *py_obj; | |
1053 | PyGILState_STATE gstate; | |
1054 | ||
1055 | gstate = PyGILState_Ensure(); | |
1056 | ||
1057 | spec.name = "sigrokdecode.Decoder"; | |
1058 | spec.basicsize = sizeof(srd_Decoder); | |
1059 | spec.itemsize = 0; | |
1060 | spec.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE; | |
1061 | spec.slots = slots; | |
1062 | ||
1063 | py_obj = PyType_FromSpec(&spec); | |
1064 | ||
1065 | PyGILState_Release(gstate); | |
1066 | ||
1067 | return py_obj; | |
1068 | } |