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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 | typedef struct { | |
26 | PyObject_HEAD | |
27 | } srd_Decoder; | |
28 | ||
29 | /* This is only used for nicer srd_dbg() output. | |
30 | */ | |
31 | static const char *output_type_name(unsigned int idx) | |
32 | { | |
33 | static const char names[][16] = { | |
34 | "OUTPUT_ANN", | |
35 | "OUTPUT_PYTHON", | |
36 | "OUTPUT_BINARY", | |
37 | "OUTPUT_META", | |
38 | "(invalid)" | |
39 | }; | |
40 | return names[MIN(idx, G_N_ELEMENTS(names) - 1)]; | |
41 | } | |
42 | ||
43 | static void release_annotation(struct srd_proto_data_annotation *pda) | |
44 | { | |
45 | if (!pda) | |
46 | return; | |
47 | if (pda->ann_text) | |
48 | g_strfreev(pda->ann_text); | |
49 | g_free(pda); | |
50 | } | |
51 | ||
52 | static int convert_annotation(struct srd_decoder_inst *di, PyObject *obj, | |
53 | struct srd_proto_data *pdata) | |
54 | { | |
55 | PyObject *py_tmp; | |
56 | struct srd_pd_output *pdo; | |
57 | struct srd_proto_data_annotation *pda; | |
58 | int ann_class; | |
59 | char **ann_text; | |
60 | PyGILState_STATE gstate; | |
61 | ||
62 | gstate = PyGILState_Ensure(); | |
63 | ||
64 | /* Should be a list of [annotation class, [string, ...]]. */ | |
65 | if (!PyList_Check(obj)) { | |
66 | srd_err("Protocol decoder %s submitted an annotation that" | |
67 | " is not a list", di->decoder->name); | |
68 | goto err; | |
69 | } | |
70 | ||
71 | /* Should have 2 elements. */ | |
72 | if (PyList_Size(obj) != 2) { | |
73 | srd_err("Protocol decoder %s submitted annotation list with " | |
74 | "%zd elements instead of 2", di->decoder->name, | |
75 | PyList_Size(obj)); | |
76 | goto err; | |
77 | } | |
78 | ||
79 | /* | |
80 | * The first element should be an integer matching a previously | |
81 | * registered annotation class. | |
82 | */ | |
83 | py_tmp = PyList_GetItem(obj, 0); | |
84 | if (!PyLong_Check(py_tmp)) { | |
85 | srd_err("Protocol decoder %s submitted annotation list, but " | |
86 | "first element was not an integer.", di->decoder->name); | |
87 | goto err; | |
88 | } | |
89 | ann_class = PyLong_AsLong(py_tmp); | |
90 | if (!(pdo = g_slist_nth_data(di->decoder->annotations, ann_class))) { | |
91 | srd_err("Protocol decoder %s submitted data to unregistered " | |
92 | "annotation class %d.", di->decoder->name, ann_class); | |
93 | goto err; | |
94 | } | |
95 | ||
96 | /* Second element must be a list. */ | |
97 | py_tmp = PyList_GetItem(obj, 1); | |
98 | if (!PyList_Check(py_tmp)) { | |
99 | srd_err("Protocol decoder %s submitted annotation list, but " | |
100 | "second element was not a list.", di->decoder->name); | |
101 | goto err; | |
102 | } | |
103 | if (py_strseq_to_char(py_tmp, &ann_text) != SRD_OK) { | |
104 | srd_err("Protocol decoder %s submitted annotation list, but " | |
105 | "second element was malformed.", di->decoder->name); | |
106 | goto err; | |
107 | } | |
108 | ||
109 | pda = g_malloc(sizeof(struct srd_proto_data_annotation)); | |
110 | pda->ann_class = ann_class; | |
111 | pda->ann_text = ann_text; | |
112 | pdata->data = pda; | |
113 | ||
114 | PyGILState_Release(gstate); | |
115 | ||
116 | return SRD_OK; | |
117 | ||
118 | err: | |
119 | PyGILState_Release(gstate); | |
120 | ||
121 | return SRD_ERR_PYTHON; | |
122 | } | |
123 | ||
124 | static void release_binary(struct srd_proto_data_binary *pdb) | |
125 | { | |
126 | if (!pdb) | |
127 | return; | |
128 | if (pdb->data) | |
129 | g_free((void *)pdb->data); | |
130 | g_free(pdb); | |
131 | } | |
132 | ||
133 | static int convert_binary(struct srd_decoder_inst *di, PyObject *obj, | |
134 | struct srd_proto_data *pdata) | |
135 | { | |
136 | struct srd_proto_data_binary *pdb; | |
137 | PyObject *py_tmp; | |
138 | Py_ssize_t size; | |
139 | int bin_class; | |
140 | char *class_name, *buf; | |
141 | PyGILState_STATE gstate; | |
142 | ||
143 | gstate = PyGILState_Ensure(); | |
144 | ||
145 | /* Should be a list of [binary class, bytes]. */ | |
146 | if (!PyList_Check(obj)) { | |
147 | srd_err("Protocol decoder %s submitted non-list for SRD_OUTPUT_BINARY.", | |
148 | di->decoder->name); | |
149 | goto err; | |
150 | } | |
151 | ||
152 | /* Should have 2 elements. */ | |
153 | if (PyList_Size(obj) != 2) { | |
154 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list " | |
155 | "with %zd elements instead of 2", di->decoder->name, | |
156 | PyList_Size(obj)); | |
157 | goto err; | |
158 | } | |
159 | ||
160 | /* The first element should be an integer. */ | |
161 | py_tmp = PyList_GetItem(obj, 0); | |
162 | if (!PyLong_Check(py_tmp)) { | |
163 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, " | |
164 | "but first element was not an integer.", di->decoder->name); | |
165 | goto err; | |
166 | } | |
167 | bin_class = PyLong_AsLong(py_tmp); | |
168 | if (!(class_name = g_slist_nth_data(di->decoder->binary, bin_class))) { | |
169 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY with " | |
170 | "unregistered binary class %d.", di->decoder->name, bin_class); | |
171 | goto err; | |
172 | } | |
173 | ||
174 | /* Second element should be bytes. */ | |
175 | py_tmp = PyList_GetItem(obj, 1); | |
176 | if (!PyBytes_Check(py_tmp)) { | |
177 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, " | |
178 | "but second element was not bytes.", di->decoder->name); | |
179 | goto err; | |
180 | } | |
181 | ||
182 | /* Consider an empty set of bytes a bug. */ | |
183 | if (PyBytes_Size(py_tmp) == 0) { | |
184 | srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY " | |
185 | "with empty data set.", di->decoder->name); | |
186 | goto err; | |
187 | } | |
188 | ||
189 | pdb = g_malloc(sizeof(struct srd_proto_data_binary)); | |
190 | if (PyBytes_AsStringAndSize(py_tmp, &buf, &size) == -1) | |
191 | goto err; | |
192 | ||
193 | PyGILState_Release(gstate); | |
194 | ||
195 | pdb->bin_class = bin_class; | |
196 | pdb->size = size; | |
197 | if (!(pdb->data = g_try_malloc(pdb->size))) | |
198 | return SRD_ERR_MALLOC; | |
199 | memcpy((void *)pdb->data, (const void *)buf, pdb->size); | |
200 | pdata->data = pdb; | |
201 | ||
202 | return SRD_OK; | |
203 | ||
204 | err: | |
205 | PyGILState_Release(gstate); | |
206 | ||
207 | return SRD_ERR_PYTHON; | |
208 | } | |
209 | ||
210 | static int convert_meta(struct srd_proto_data *pdata, PyObject *obj) | |
211 | { | |
212 | long long intvalue; | |
213 | double dvalue; | |
214 | PyGILState_STATE gstate; | |
215 | ||
216 | gstate = PyGILState_Ensure(); | |
217 | ||
218 | if (pdata->pdo->meta_type == G_VARIANT_TYPE_INT64) { | |
219 | if (!PyLong_Check(obj)) { | |
220 | PyErr_Format(PyExc_TypeError, "This output was registered " | |
221 | "as 'int', but something else was passed."); | |
222 | goto err; | |
223 | } | |
224 | intvalue = PyLong_AsLongLong(obj); | |
225 | if (PyErr_Occurred()) | |
226 | goto err; | |
227 | pdata->data = g_variant_new_int64(intvalue); | |
228 | } else if (pdata->pdo->meta_type == G_VARIANT_TYPE_DOUBLE) { | |
229 | if (!PyFloat_Check(obj)) { | |
230 | PyErr_Format(PyExc_TypeError, "This output was registered " | |
231 | "as 'float', but something else was passed."); | |
232 | goto err; | |
233 | } | |
234 | dvalue = PyFloat_AsDouble(obj); | |
235 | if (PyErr_Occurred()) | |
236 | goto err; | |
237 | pdata->data = g_variant_new_double(dvalue); | |
238 | } | |
239 | ||
240 | PyGILState_Release(gstate); | |
241 | ||
242 | return SRD_OK; | |
243 | ||
244 | err: | |
245 | PyGILState_Release(gstate); | |
246 | ||
247 | return SRD_ERR_PYTHON; | |
248 | } | |
249 | ||
250 | static PyObject *Decoder_put(PyObject *self, PyObject *args) | |
251 | { | |
252 | GSList *l; | |
253 | PyObject *py_data, *py_res; | |
254 | struct srd_decoder_inst *di, *next_di; | |
255 | struct srd_pd_output *pdo; | |
256 | struct srd_proto_data pdata; | |
257 | uint64_t start_sample, end_sample; | |
258 | int output_id; | |
259 | struct srd_pd_callback *cb; | |
260 | PyGILState_STATE gstate; | |
261 | ||
262 | gstate = PyGILState_Ensure(); | |
263 | ||
264 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
265 | /* Shouldn't happen. */ | |
266 | srd_dbg("put(): self instance not found."); | |
267 | goto err; | |
268 | } | |
269 | ||
270 | if (!PyArg_ParseTuple(args, "KKiO", &start_sample, &end_sample, | |
271 | &output_id, &py_data)) { | |
272 | /* | |
273 | * This throws an exception, but by returning NULL here we let | |
274 | * Python raise it. This results in a much better trace in | |
275 | * controller.c on the decode() method call. | |
276 | */ | |
277 | goto err; | |
278 | } | |
279 | ||
280 | if (!(l = g_slist_nth(di->pd_output, output_id))) { | |
281 | srd_err("Protocol decoder %s submitted invalid output ID %d.", | |
282 | di->decoder->name, output_id); | |
283 | goto err; | |
284 | } | |
285 | pdo = l->data; | |
286 | ||
287 | srd_spew("Instance %s put %" PRIu64 "-%" PRIu64 " %s on oid %d.", | |
288 | di->inst_id, start_sample, end_sample, | |
289 | output_type_name(pdo->output_type), output_id); | |
290 | ||
291 | pdata.start_sample = start_sample; | |
292 | pdata.end_sample = end_sample; | |
293 | pdata.pdo = pdo; | |
294 | pdata.data = NULL; | |
295 | ||
296 | switch (pdo->output_type) { | |
297 | case SRD_OUTPUT_ANN: | |
298 | /* Annotations are only fed to callbacks. */ | |
299 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
300 | /* Convert from PyDict to srd_proto_data_annotation. */ | |
301 | if (convert_annotation(di, py_data, &pdata) != SRD_OK) { | |
302 | /* An error was already logged. */ | |
303 | break; | |
304 | } | |
305 | Py_BEGIN_ALLOW_THREADS | |
306 | cb->cb(&pdata, cb->cb_data); | |
307 | Py_END_ALLOW_THREADS | |
308 | release_annotation(pdata.data); | |
309 | } | |
310 | break; | |
311 | case SRD_OUTPUT_PYTHON: | |
312 | for (l = di->next_di; l; l = l->next) { | |
313 | next_di = l->data; | |
314 | srd_spew("Sending %" PRIu64 "-%" PRIu64 " to instance %s", | |
315 | start_sample, end_sample, next_di->inst_id); | |
316 | if (!(py_res = PyObject_CallMethod( | |
317 | next_di->py_inst, "decode", "KKO", start_sample, | |
318 | end_sample, py_data))) { | |
319 | srd_exception_catch("Calling %s decode() failed", | |
320 | next_di->inst_id); | |
321 | } | |
322 | Py_XDECREF(py_res); | |
323 | } | |
324 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
325 | /* Frontends aren't really supposed to get Python | |
326 | * callbacks, but it's useful for testing. */ | |
327 | pdata.data = py_data; | |
328 | cb->cb(&pdata, cb->cb_data); | |
329 | } | |
330 | break; | |
331 | case SRD_OUTPUT_BINARY: | |
332 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
333 | /* Convert from PyDict to srd_proto_data_binary. */ | |
334 | if (convert_binary(di, py_data, &pdata) != SRD_OK) { | |
335 | /* An error was already logged. */ | |
336 | break; | |
337 | } | |
338 | Py_BEGIN_ALLOW_THREADS | |
339 | cb->cb(&pdata, cb->cb_data); | |
340 | Py_END_ALLOW_THREADS | |
341 | release_binary(pdata.data); | |
342 | } | |
343 | break; | |
344 | case SRD_OUTPUT_META: | |
345 | if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) { | |
346 | /* Annotations need converting from PyObject. */ | |
347 | if (convert_meta(&pdata, py_data) != SRD_OK) { | |
348 | /* An exception was already set up. */ | |
349 | break; | |
350 | } | |
351 | Py_BEGIN_ALLOW_THREADS | |
352 | cb->cb(&pdata, cb->cb_data); | |
353 | Py_END_ALLOW_THREADS | |
354 | } | |
355 | break; | |
356 | default: | |
357 | srd_err("Protocol decoder %s submitted invalid output type %d.", | |
358 | di->decoder->name, pdo->output_type); | |
359 | break; | |
360 | } | |
361 | ||
362 | PyGILState_Release(gstate); | |
363 | ||
364 | Py_RETURN_NONE; | |
365 | ||
366 | err: | |
367 | PyGILState_Release(gstate); | |
368 | ||
369 | return NULL; | |
370 | } | |
371 | ||
372 | static PyObject *Decoder_register(PyObject *self, PyObject *args, | |
373 | PyObject *kwargs) | |
374 | { | |
375 | struct srd_decoder_inst *di; | |
376 | struct srd_pd_output *pdo; | |
377 | PyObject *py_new_output_id; | |
378 | PyTypeObject *meta_type_py; | |
379 | const GVariantType *meta_type_gv; | |
380 | int output_type; | |
381 | char *proto_id, *meta_name, *meta_descr; | |
382 | char *keywords[] = {"output_type", "proto_id", "meta", NULL}; | |
383 | PyGILState_STATE gstate; | |
384 | gboolean is_meta; | |
385 | GSList *l; | |
386 | struct srd_pd_output *cmp; | |
387 | ||
388 | gstate = PyGILState_Ensure(); | |
389 | ||
390 | meta_type_py = NULL; | |
391 | meta_type_gv = NULL; | |
392 | meta_name = meta_descr = NULL; | |
393 | ||
394 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
395 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
396 | goto err; | |
397 | } | |
398 | ||
399 | /* Default to instance id, which defaults to class id. */ | |
400 | proto_id = di->inst_id; | |
401 | if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i|s(Oss)", keywords, | |
402 | &output_type, &proto_id, | |
403 | &meta_type_py, &meta_name, &meta_descr)) { | |
404 | /* Let Python raise this exception. */ | |
405 | goto err; | |
406 | } | |
407 | ||
408 | /* Check if the meta value's type is supported. */ | |
409 | is_meta = output_type == SRD_OUTPUT_META; | |
410 | if (is_meta) { | |
411 | if (meta_type_py == &PyLong_Type) | |
412 | meta_type_gv = G_VARIANT_TYPE_INT64; | |
413 | else if (meta_type_py == &PyFloat_Type) | |
414 | meta_type_gv = G_VARIANT_TYPE_DOUBLE; | |
415 | else { | |
416 | PyErr_Format(PyExc_TypeError, "Unsupported type."); | |
417 | goto err; | |
418 | } | |
419 | } | |
420 | ||
421 | pdo = NULL; | |
422 | for (l = di->pd_output; l; l = l->next) { | |
423 | cmp = l->data; | |
424 | if (cmp->output_type != output_type) | |
425 | continue; | |
426 | if (strcmp(cmp->proto_id, proto_id) != 0) | |
427 | continue; | |
428 | if (is_meta && cmp->meta_type != meta_type_gv) | |
429 | continue; | |
430 | if (is_meta && strcmp(cmp->meta_name, meta_name) != 0) | |
431 | continue; | |
432 | if (is_meta && strcmp(cmp->meta_descr, meta_descr) != 0) | |
433 | continue; | |
434 | pdo = cmp; | |
435 | break; | |
436 | } | |
437 | if (pdo) { | |
438 | py_new_output_id = Py_BuildValue("i", pdo->pdo_id); | |
439 | PyGILState_Release(gstate); | |
440 | return py_new_output_id; | |
441 | } | |
442 | ||
443 | srd_dbg("Instance %s creating new output type %d for %s.", | |
444 | di->inst_id, output_type, proto_id); | |
445 | ||
446 | pdo = g_malloc(sizeof(struct srd_pd_output)); | |
447 | ||
448 | /* pdo_id is just a simple index, nothing is deleted from this list anyway. */ | |
449 | pdo->pdo_id = g_slist_length(di->pd_output); | |
450 | pdo->output_type = output_type; | |
451 | pdo->di = di; | |
452 | pdo->proto_id = g_strdup(proto_id); | |
453 | ||
454 | if (output_type == SRD_OUTPUT_META) { | |
455 | pdo->meta_type = meta_type_gv; | |
456 | pdo->meta_name = g_strdup(meta_name); | |
457 | pdo->meta_descr = g_strdup(meta_descr); | |
458 | } | |
459 | ||
460 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
461 | py_new_output_id = Py_BuildValue("i", pdo->pdo_id); | |
462 | ||
463 | PyGILState_Release(gstate); | |
464 | ||
465 | return py_new_output_id; | |
466 | ||
467 | err: | |
468 | PyGILState_Release(gstate); | |
469 | ||
470 | return NULL; | |
471 | } | |
472 | ||
473 | static int get_term_type(const char *v) | |
474 | { | |
475 | switch (v[0]) { | |
476 | case 'h': | |
477 | return SRD_TERM_HIGH; | |
478 | case 'l': | |
479 | return SRD_TERM_LOW; | |
480 | case 'r': | |
481 | return SRD_TERM_RISING_EDGE; | |
482 | case 'f': | |
483 | return SRD_TERM_FALLING_EDGE; | |
484 | case 'e': | |
485 | return SRD_TERM_EITHER_EDGE; | |
486 | case 'n': | |
487 | return SRD_TERM_NO_EDGE; | |
488 | } | |
489 | ||
490 | return -1; | |
491 | } | |
492 | ||
493 | /** | |
494 | * Get the pin values at the current sample number. | |
495 | * | |
496 | * @param di The decoder instance to use. Must not be NULL. | |
497 | * The number of channels must be >= 1. | |
498 | * | |
499 | * @return A newly allocated PyTuple containing the pin values at the | |
500 | * current sample number. | |
501 | */ | |
502 | static PyObject *get_current_pinvalues(const struct srd_decoder_inst *di) | |
503 | { | |
504 | int i; | |
505 | uint8_t sample; | |
506 | const uint8_t *sample_pos; | |
507 | int byte_offset, bit_offset; | |
508 | PyObject *py_pinvalues; | |
509 | PyGILState_STATE gstate; | |
510 | ||
511 | gstate = PyGILState_Ensure(); | |
512 | ||
513 | if (!di) { | |
514 | srd_err("Invalid decoder instance."); | |
515 | PyGILState_Release(gstate); | |
516 | return NULL; | |
517 | } | |
518 | ||
519 | py_pinvalues = PyTuple_New(di->dec_num_channels); | |
520 | ||
521 | for (i = 0; i < di->dec_num_channels; i++) { | |
522 | /* A channelmap value of -1 means "unused optional channel". */ | |
523 | if (di->dec_channelmap[i] == -1) { | |
524 | /* Value of unused channel is 0xff, instead of 0 or 1. */ | |
525 | PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(0xff)); | |
526 | } else { | |
527 | sample_pos = di->inbuf + ((di->abs_cur_samplenum - di->abs_start_samplenum) * di->data_unitsize); | |
528 | byte_offset = di->dec_channelmap[i] / 8; | |
529 | bit_offset = di->dec_channelmap[i] % 8; | |
530 | sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0; | |
531 | PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(sample)); | |
532 | } | |
533 | } | |
534 | ||
535 | PyGILState_Release(gstate); | |
536 | ||
537 | return py_pinvalues; | |
538 | } | |
539 | ||
540 | /** | |
541 | * Create a list of terms in the specified condition. | |
542 | * | |
543 | * If there are no terms in the condition, 'term_list' will be NULL. | |
544 | * | |
545 | * @param py_dict A Python dict containing terms. Must not be NULL. | |
546 | * @param term_list Pointer to a GSList which will be set to the newly | |
547 | * created list of terms. Must not be NULL. | |
548 | * | |
549 | * @return SRD_OK upon success, a negative error code otherwise. | |
550 | */ | |
551 | static int create_term_list(PyObject *py_dict, GSList **term_list) | |
552 | { | |
553 | Py_ssize_t pos = 0; | |
554 | PyObject *py_key, *py_value; | |
555 | struct srd_term *term; | |
556 | uint64_t num_samples_to_skip; | |
557 | char *term_str; | |
558 | PyGILState_STATE gstate; | |
559 | ||
560 | if (!py_dict || !term_list) | |
561 | return SRD_ERR_ARG; | |
562 | ||
563 | /* "Create" an empty GSList of terms. */ | |
564 | *term_list = NULL; | |
565 | ||
566 | gstate = PyGILState_Ensure(); | |
567 | ||
568 | /* Iterate over all items in the current dict. */ | |
569 | while (PyDict_Next(py_dict, &pos, &py_key, &py_value)) { | |
570 | /* Check whether the current key is a string or a number. */ | |
571 | if (PyLong_Check(py_key)) { | |
572 | /* The key is a number. */ | |
573 | /* TODO: Check if the number is a valid channel. */ | |
574 | /* Get the value string. */ | |
575 | if ((py_pydictitem_as_str(py_dict, py_key, &term_str)) != SRD_OK) { | |
576 | srd_err("Failed to get the value."); | |
577 | goto err; | |
578 | } | |
579 | term = g_malloc0(sizeof(struct srd_term)); | |
580 | term->type = get_term_type(term_str); | |
581 | term->channel = PyLong_AsLong(py_key); | |
582 | g_free(term_str); | |
583 | } else if (PyUnicode_Check(py_key)) { | |
584 | /* The key is a string. */ | |
585 | /* TODO: Check if it's "skip". */ | |
586 | if ((py_pydictitem_as_long(py_dict, py_key, &num_samples_to_skip)) != SRD_OK) { | |
587 | srd_err("Failed to get number of samples to skip."); | |
588 | goto err; | |
589 | } | |
590 | term = g_malloc0(sizeof(struct srd_term)); | |
591 | term->type = SRD_TERM_SKIP; | |
592 | term->num_samples_to_skip = num_samples_to_skip; | |
593 | term->num_samples_already_skipped = 0; | |
594 | } else { | |
595 | srd_err("Term key is neither a string nor a number."); | |
596 | goto err; | |
597 | } | |
598 | ||
599 | /* Add the term to the list of terms. */ | |
600 | *term_list = g_slist_append(*term_list, term); | |
601 | } | |
602 | ||
603 | PyGILState_Release(gstate); | |
604 | ||
605 | return SRD_OK; | |
606 | ||
607 | err: | |
608 | PyGILState_Release(gstate); | |
609 | ||
610 | return SRD_ERR; | |
611 | } | |
612 | ||
613 | /** | |
614 | * Replace the current condition list with the new one. | |
615 | * | |
616 | * @param self TODO. Must not be NULL. | |
617 | * @param args TODO. Must not be NULL. | |
618 | * | |
619 | * @retval SRD_OK The new condition list was set successfully. | |
620 | * @retval SRD_ERR There was an error setting the new condition list. | |
621 | * The contents of di->condition_list are undefined. | |
622 | * @retval 9999 TODO. | |
623 | */ | |
624 | static int set_new_condition_list(PyObject *self, PyObject *args) | |
625 | { | |
626 | struct srd_decoder_inst *di; | |
627 | GSList *term_list; | |
628 | PyObject *py_conditionlist, *py_conds, *py_dict; | |
629 | int i, num_conditions, ret; | |
630 | PyGILState_STATE gstate; | |
631 | ||
632 | if (!self || !args) | |
633 | return SRD_ERR_ARG; | |
634 | ||
635 | gstate = PyGILState_Ensure(); | |
636 | ||
637 | /* Get the decoder instance. */ | |
638 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
639 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
640 | goto err; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Return an error condition from .wait() when termination is | |
645 | * requested, such that decode() will terminate. | |
646 | */ | |
647 | if (di->want_wait_terminate) { | |
648 | srd_dbg("%s: %s: Skip (want_term).", di->inst_id, __func__); | |
649 | goto err; | |
650 | } | |
651 | ||
652 | /* | |
653 | * Parse the argument of self.wait() into 'py_conds', and check | |
654 | * the data type. The argument is optional, None is assumed in | |
655 | * its absence. None or an empty dict or an empty list mean that | |
656 | * there is no condition, and the next available sample shall | |
657 | * get returned to the caller. | |
658 | */ | |
659 | py_conds = Py_None; | |
660 | if (!PyArg_ParseTuple(args, "|O", &py_conds)) { | |
661 | /* Let Python raise this exception. */ | |
662 | goto err; | |
663 | } | |
664 | if (py_conds == Py_None) { | |
665 | /* 'py_conds' is None. */ | |
666 | goto ret_9999; | |
667 | } else if (PyList_Check(py_conds)) { | |
668 | /* 'py_conds' is a list. */ | |
669 | py_conditionlist = py_conds; | |
670 | num_conditions = PyList_Size(py_conditionlist); | |
671 | if (num_conditions == 0) | |
672 | goto ret_9999; /* The PD invoked self.wait([]). */ | |
673 | Py_IncRef(py_conditionlist); | |
674 | } else if (PyDict_Check(py_conds)) { | |
675 | /* 'py_conds' is a dict. */ | |
676 | if (PyDict_Size(py_conds) == 0) | |
677 | goto ret_9999; /* The PD invoked self.wait({}). */ | |
678 | /* Make a list and put the dict in there for convenience. */ | |
679 | py_conditionlist = PyList_New(1); | |
680 | Py_IncRef(py_conds); | |
681 | PyList_SetItem(py_conditionlist, 0, py_conds); | |
682 | num_conditions = 1; | |
683 | } else { | |
684 | srd_err("Condition list is neither a list nor a dict."); | |
685 | goto err; | |
686 | } | |
687 | ||
688 | /* Free the old condition list. */ | |
689 | condition_list_free(di); | |
690 | ||
691 | ret = SRD_OK; | |
692 | ||
693 | /* Iterate over the conditions, set di->condition_list accordingly. */ | |
694 | for (i = 0; i < num_conditions; i++) { | |
695 | /* Get a condition (dict) from the condition list. */ | |
696 | py_dict = PyList_GetItem(py_conditionlist, i); | |
697 | if (!PyDict_Check(py_dict)) { | |
698 | srd_err("Condition is not a dict."); | |
699 | ret = SRD_ERR; | |
700 | break; | |
701 | } | |
702 | ||
703 | /* Create the list of terms in this condition. */ | |
704 | if ((ret = create_term_list(py_dict, &term_list)) < 0) | |
705 | break; | |
706 | ||
707 | /* Add the new condition to the PD instance's condition list. */ | |
708 | di->condition_list = g_slist_append(di->condition_list, term_list); | |
709 | } | |
710 | ||
711 | Py_DecRef(py_conditionlist); | |
712 | ||
713 | PyGILState_Release(gstate); | |
714 | ||
715 | return ret; | |
716 | ||
717 | err: | |
718 | PyGILState_Release(gstate); | |
719 | ||
720 | return SRD_ERR; | |
721 | ||
722 | ret_9999: | |
723 | PyGILState_Release(gstate); | |
724 | ||
725 | return 9999; | |
726 | } | |
727 | ||
728 | /** | |
729 | * Create a SKIP condition list for condition-less .wait() calls. | |
730 | * | |
731 | * @param di Decoder instance. | |
732 | * @param count Number of samples to skip. | |
733 | * | |
734 | * @retval SRD_OK The new condition list was set successfully. | |
735 | * @retval SRD_ERR There was an error setting the new condition list. | |
736 | * The contents of di->condition_list are undefined. | |
737 | * | |
738 | * This routine is a reduced and specialized version of the @ref | |
739 | * set_new_condition_list() and @ref create_term_list() routines which | |
740 | * gets invoked when .wait() was called without specifications for | |
741 | * conditions. This minor duplication of the SKIP term list creation | |
742 | * simplifies the logic and avoids the creation of expensive Python | |
743 | * objects with "constant" values which the caller did not pass in the | |
744 | * first place. It results in maximum sharing of match handling code | |
745 | * paths. | |
746 | */ | |
747 | static int set_skip_condition(struct srd_decoder_inst *di, uint64_t count) | |
748 | { | |
749 | struct srd_term *term; | |
750 | GSList *term_list; | |
751 | ||
752 | condition_list_free(di); | |
753 | term = g_malloc0(sizeof(*term)); | |
754 | term->type = SRD_TERM_SKIP; | |
755 | term->num_samples_to_skip = count; | |
756 | term->num_samples_already_skipped = 0; | |
757 | term_list = g_slist_append(NULL, term); | |
758 | di->condition_list = g_slist_append(di->condition_list, term_list); | |
759 | ||
760 | return SRD_OK; | |
761 | } | |
762 | ||
763 | static PyObject *Decoder_wait(PyObject *self, PyObject *args) | |
764 | { | |
765 | int ret; | |
766 | uint64_t skip_count; | |
767 | unsigned int i; | |
768 | gboolean found_match; | |
769 | struct srd_decoder_inst *di; | |
770 | PyObject *py_pinvalues, *py_matched; | |
771 | PyGILState_STATE gstate; | |
772 | ||
773 | if (!self || !args) | |
774 | return NULL; | |
775 | ||
776 | gstate = PyGILState_Ensure(); | |
777 | ||
778 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
779 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
780 | PyGILState_Release(gstate); | |
781 | Py_RETURN_NONE; | |
782 | } | |
783 | ||
784 | ret = set_new_condition_list(self, args); | |
785 | if (ret < 0) { | |
786 | srd_dbg("%s: %s: Aborting wait().", di->inst_id, __func__); | |
787 | goto err; | |
788 | } | |
789 | if (ret == 9999) { | |
790 | /* | |
791 | * Empty condition list, automatic match. Arrange for the | |
792 | * execution of regular match handling code paths such that | |
793 | * the next available sample is returned to the caller. | |
794 | * Make sure to skip one sample when "anywhere within the | |
795 | * stream", yet make sure to not skip sample number 0. | |
796 | */ | |
797 | if (di->abs_cur_samplenum) | |
798 | skip_count = 1; | |
799 | else if (!di->condition_list) | |
800 | skip_count = 0; | |
801 | else | |
802 | skip_count = 1; | |
803 | ret = set_skip_condition(di, skip_count); | |
804 | if (ret < 0) { | |
805 | srd_dbg("%s: %s: Cannot setup condition-less wait().", | |
806 | di->inst_id, __func__); | |
807 | goto err; | |
808 | } | |
809 | } | |
810 | ||
811 | while (1) { | |
812 | ||
813 | Py_BEGIN_ALLOW_THREADS | |
814 | ||
815 | /* Wait for new samples to process, or termination request. */ | |
816 | g_mutex_lock(&di->data_mutex); | |
817 | while (!di->got_new_samples && !di->want_wait_terminate) | |
818 | g_cond_wait(&di->got_new_samples_cond, &di->data_mutex); | |
819 | ||
820 | /* | |
821 | * Check whether any of the current condition(s) match. | |
822 | * Arrange for termination requests to take a code path which | |
823 | * won't find new samples to process, pretends to have processed | |
824 | * previously stored samples, and returns to the main thread, | |
825 | * while the termination request still gets signalled. | |
826 | */ | |
827 | found_match = FALSE; | |
828 | ret = process_samples_until_condition_match(di, &found_match); | |
829 | ||
830 | Py_END_ALLOW_THREADS | |
831 | ||
832 | /* If there's a match, set self.samplenum etc. and return. */ | |
833 | if (found_match) { | |
834 | /* Set self.samplenum to the (absolute) sample number that matched. */ | |
835 | PyObject_SetAttrString(di->py_inst, "samplenum", | |
836 | PyLong_FromLong(di->abs_cur_samplenum)); | |
837 | ||
838 | if (di->match_array && di->match_array->len > 0) { | |
839 | py_matched = PyTuple_New(di->match_array->len); | |
840 | for (i = 0; i < di->match_array->len; i++) | |
841 | PyTuple_SetItem(py_matched, i, PyBool_FromLong(di->match_array->data[i])); | |
842 | PyObject_SetAttrString(di->py_inst, "matched", py_matched); | |
843 | match_array_free(di); | |
844 | } else { | |
845 | PyObject_SetAttrString(di->py_inst, "matched", Py_None); | |
846 | } | |
847 | ||
848 | py_pinvalues = get_current_pinvalues(di); | |
849 | ||
850 | g_mutex_unlock(&di->data_mutex); | |
851 | ||
852 | PyGILState_Release(gstate); | |
853 | ||
854 | return py_pinvalues; | |
855 | } | |
856 | ||
857 | /* No match, reset state for the next chunk. */ | |
858 | di->got_new_samples = FALSE; | |
859 | di->handled_all_samples = TRUE; | |
860 | di->abs_start_samplenum = 0; | |
861 | di->abs_end_samplenum = 0; | |
862 | di->inbuf = NULL; | |
863 | di->inbuflen = 0; | |
864 | ||
865 | /* Signal the main thread that we handled all samples. */ | |
866 | g_cond_signal(&di->handled_all_samples_cond); | |
867 | ||
868 | /* | |
869 | * When termination of wait() and decode() was requested, | |
870 | * then exit the loop after releasing the mutex. | |
871 | */ | |
872 | if (di->want_wait_terminate) { | |
873 | srd_dbg("%s: %s: Will return from wait().", | |
874 | di->inst_id, __func__); | |
875 | g_mutex_unlock(&di->data_mutex); | |
876 | goto err; | |
877 | } | |
878 | ||
879 | g_mutex_unlock(&di->data_mutex); | |
880 | } | |
881 | ||
882 | PyGILState_Release(gstate); | |
883 | ||
884 | Py_RETURN_NONE; | |
885 | ||
886 | err: | |
887 | PyGILState_Release(gstate); | |
888 | ||
889 | return NULL; | |
890 | } | |
891 | ||
892 | /** | |
893 | * Return whether the specified channel was supplied to the decoder. | |
894 | * | |
895 | * @param self TODO. Must not be NULL. | |
896 | * @param args TODO. Must not be NULL. | |
897 | * | |
898 | * @retval Py_True The channel has been supplied by the frontend. | |
899 | * @retval Py_False The channel has been supplied by the frontend. | |
900 | * @retval NULL An error occurred. | |
901 | */ | |
902 | static PyObject *Decoder_has_channel(PyObject *self, PyObject *args) | |
903 | { | |
904 | int idx, count; | |
905 | struct srd_decoder_inst *di; | |
906 | PyGILState_STATE gstate; | |
907 | ||
908 | if (!self || !args) | |
909 | return NULL; | |
910 | ||
911 | gstate = PyGILState_Ensure(); | |
912 | ||
913 | if (!(di = srd_inst_find_by_obj(NULL, self))) { | |
914 | PyErr_SetString(PyExc_Exception, "decoder instance not found"); | |
915 | goto err; | |
916 | } | |
917 | ||
918 | /* | |
919 | * Get the integer argument of self.has_channel(). Check for | |
920 | * the range of supported PD input channel numbers. | |
921 | */ | |
922 | if (!PyArg_ParseTuple(args, "i", &idx)) { | |
923 | /* Let Python raise this exception. */ | |
924 | goto err; | |
925 | } | |
926 | ||
927 | count = g_slist_length(di->decoder->channels) + | |
928 | g_slist_length(di->decoder->opt_channels); | |
929 | if (idx < 0 || idx >= count) { | |
930 | srd_err("Invalid index %d, PD channel count %d.", idx, count); | |
931 | PyErr_SetString(PyExc_IndexError, "invalid channel index"); | |
932 | goto err; | |
933 | } | |
934 | ||
935 | PyGILState_Release(gstate); | |
936 | ||
937 | return (di->dec_channelmap[idx] == -1) ? Py_False : Py_True; | |
938 | ||
939 | err: | |
940 | PyGILState_Release(gstate); | |
941 | ||
942 | return NULL; | |
943 | } | |
944 | ||
945 | static PyMethodDef Decoder_methods[] = { | |
946 | {"put", Decoder_put, METH_VARARGS, | |
947 | "Accepts a dictionary with the following keys: startsample, endsample, data"}, | |
948 | {"register", (PyCFunction)Decoder_register, METH_VARARGS|METH_KEYWORDS, | |
949 | "Register a new output stream"}, | |
950 | {"wait", Decoder_wait, METH_VARARGS, | |
951 | "Wait for one or more conditions to occur"}, | |
952 | {"has_channel", Decoder_has_channel, METH_VARARGS, | |
953 | "Report whether a channel was supplied"}, | |
954 | {NULL, NULL, 0, NULL} | |
955 | }; | |
956 | ||
957 | /** | |
958 | * Create the sigrokdecode.Decoder type. | |
959 | * | |
960 | * @return The new type object. | |
961 | * | |
962 | * @private | |
963 | */ | |
964 | SRD_PRIV PyObject *srd_Decoder_type_new(void) | |
965 | { | |
966 | PyType_Spec spec; | |
967 | PyType_Slot slots[] = { | |
968 | { Py_tp_doc, "sigrok Decoder base class" }, | |
969 | { Py_tp_methods, Decoder_methods }, | |
970 | { Py_tp_new, (void *)&PyType_GenericNew }, | |
971 | { 0, NULL } | |
972 | }; | |
973 | PyObject *py_obj; | |
974 | PyGILState_STATE gstate; | |
975 | ||
976 | gstate = PyGILState_Ensure(); | |
977 | ||
978 | spec.name = "sigrokdecode.Decoder"; | |
979 | spec.basicsize = sizeof(srd_Decoder); | |
980 | spec.itemsize = 0; | |
981 | spec.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE; | |
982 | spec.slots = slots; | |
983 | ||
984 | py_obj = PyType_FromSpec(&spec); | |
985 | ||
986 | PyGILState_Release(gstate); | |
987 | ||
988 | return py_obj; | |
989 | } |