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1 | /* | |
2 | * This file is part of the sigrok 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 "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
22 | #include "sigrokdecode-internal.h" | |
23 | #include "config.h" | |
24 | #include <glib.h> | |
25 | #include <inttypes.h> | |
26 | #include <stdlib.h> | |
27 | ||
28 | ||
29 | /* List of decoder instances. */ | |
30 | static GSList *di_list = NULL; | |
31 | ||
32 | /* List of frontend callbacks to receive PD output. */ | |
33 | static GSList *callbacks = NULL; | |
34 | ||
35 | /* lives in decoder.c */ | |
36 | extern GSList *pd_list; | |
37 | ||
38 | /* lives in module_sigrokdecode.c */ | |
39 | extern PyMODINIT_FUNC PyInit_sigrokdecode(void); | |
40 | ||
41 | /* lives in type_logic.c */ | |
42 | extern PyTypeObject srd_logic_type; | |
43 | ||
44 | ||
45 | /** | |
46 | * Initialize libsigrokdecode. | |
47 | * | |
48 | * This initializes the Python interpreter, and creates and initializes | |
49 | * a "sigrok" Python module with a single put() method. | |
50 | * | |
51 | * Then, it searches for sigrok protocol decoder files (*.py) in the | |
52 | * "decoders" subdirectory of the the sigrok installation directory. | |
53 | * All decoders that are found are loaded into memory and added to an | |
54 | * internal list of decoders, which can be queried via srd_list_decoders(). | |
55 | * | |
56 | * The caller is responsible for calling the clean-up function srd_exit(), | |
57 | * which will properly shut down libsigrokdecode and free its allocated memory. | |
58 | * | |
59 | * Multiple calls to srd_init(), without calling srd_exit() in between, | |
60 | * are not allowed. | |
61 | * | |
62 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
63 | * Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders | |
64 | * directory cannot be accessed, return SRD_ERR_DECODERS_DIR. | |
65 | * If not enough memory could be allocated, return SRD_ERR_MALLOC. | |
66 | */ | |
67 | int srd_init(void) | |
68 | { | |
69 | int ret; | |
70 | ||
71 | srd_dbg("Initializing libsigrokdecode."); | |
72 | ||
73 | /* Add our own module to the list of built-in modules. */ | |
74 | PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode); | |
75 | ||
76 | /* Initialize the python interpreter. */ | |
77 | Py_Initialize(); | |
78 | ||
79 | if ((ret = set_modulepath()) != SRD_OK) { | |
80 | Py_Finalize(); | |
81 | return ret; | |
82 | } | |
83 | ||
84 | if ((ret = srd_load_all_decoders()) != SRD_OK) { | |
85 | Py_Finalize(); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | return SRD_OK; | |
90 | } | |
91 | ||
92 | ||
93 | /** | |
94 | * Shutdown libsigrokdecode. | |
95 | * | |
96 | * This frees all the memory allocated for protocol decoders and shuts down | |
97 | * the Python interpreter. | |
98 | * | |
99 | * This function should only be called if there was a (successful!) invocation | |
100 | * of srd_init() before. Calling this function multiple times in a row, without | |
101 | * any successful srd_init() calls in between, is not allowed. | |
102 | * | |
103 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
104 | */ | |
105 | int srd_exit(void) | |
106 | { | |
107 | ||
108 | srd_dbg("Exiting libsigrokdecode."); | |
109 | ||
110 | srd_unload_all_decoders(); | |
111 | g_slist_free(pd_list); | |
112 | ||
113 | /* Py_Finalize() returns void, any finalization errors are ignored. */ | |
114 | Py_Finalize(); | |
115 | ||
116 | return SRD_OK; | |
117 | } | |
118 | ||
119 | ||
120 | /** | |
121 | * Add an additional search directory for the protocol decoders. | |
122 | * | |
123 | * The specified directory is prepended (not appended!) to Python's sys.path, | |
124 | * in order to search for sigrok protocol decoders in the specified | |
125 | * directories first, and in the generic Python module directories (and in | |
126 | * the current working directory) last. This avoids conflicts if there are | |
127 | * Python modules which have the same name as a sigrok protocol decoder in | |
128 | * sys.path or in the current working directory. | |
129 | * | |
130 | * TODO: add path from env var SIGROKDECODE_PATH, config etc | |
131 | * TODO: Should take directoryname/path as input. | |
132 | * | |
133 | * @return TODO. | |
134 | */ | |
135 | int set_modulepath(void) | |
136 | { | |
137 | int ret; | |
138 | gchar *path, *s; | |
139 | ||
140 | #ifdef _WIN32 | |
141 | gchar **splitted; | |
142 | ||
143 | /* | |
144 | * On Windows/MinGW, Python's sys.path needs entries of the form | |
145 | * 'C:\\foo\\bar' instead of '/foo/bar'. | |
146 | */ | |
147 | ||
148 | splitted = g_strsplit(DECODERS_DIR, "/", 0); | |
149 | path = g_build_pathv("\\\\", splitted); | |
150 | g_strfreev(splitted); | |
151 | #else | |
152 | path = g_strdup(DECODERS_DIR); | |
153 | #endif | |
154 | ||
155 | /* TODO: Sanity check on 'path' (length, escape special chars, ...). */ | |
156 | s = g_strdup_printf("import sys; sys.path.insert(0, r'%s')", path); | |
157 | ||
158 | ret = PyRun_SimpleString(s); | |
159 | ||
160 | g_free(path); | |
161 | g_free(s); | |
162 | ||
163 | return ret; | |
164 | } | |
165 | ||
166 | ||
167 | /** | |
168 | * Set options in a decoder instance. | |
169 | * | |
170 | * @param di Decoder instance. | |
171 | * @param options A GHashTable of options to set. | |
172 | * | |
173 | * Handled options are removed from the hash. | |
174 | * | |
175 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
176 | */ | |
177 | int srd_instance_set_options(struct srd_decoder_instance *di, | |
178 | GHashTable *options) | |
179 | { | |
180 | PyObject *py_dec_options, *py_dec_optkeys, *py_di_options, *py_optval; | |
181 | PyObject *py_optlist, *py_classval; | |
182 | Py_UNICODE *py_ustr; | |
183 | unsigned long long int val_ull; | |
184 | int num_optkeys, ret, size, i; | |
185 | char *key, *value; | |
186 | ||
187 | if(!PyObject_HasAttrString(di->decoder->py_dec, "options")) { | |
188 | /* Decoder has no options. */ | |
189 | if (g_hash_table_size(options) == 0) { | |
190 | /* No options provided. */ | |
191 | return SRD_OK; | |
192 | } else { | |
193 | srd_err("Protocol decoder has no options."); | |
194 | return SRD_ERR_ARG; | |
195 | } | |
196 | return SRD_OK; | |
197 | } | |
198 | ||
199 | ret = SRD_ERR_PYTHON; | |
200 | key = NULL; | |
201 | py_dec_options = py_dec_optkeys = py_di_options = py_optval = NULL; | |
202 | py_optlist = py_classval = NULL; | |
203 | py_dec_options = PyObject_GetAttrString(di->decoder->py_dec, "options"); | |
204 | ||
205 | /* All of these are synthesized objects, so they're good. */ | |
206 | py_dec_optkeys = PyDict_Keys(py_dec_options); | |
207 | num_optkeys = PyList_Size(py_dec_optkeys); | |
208 | if (!(py_di_options = PyObject_GetAttrString(di->py_instance, "options"))) | |
209 | goto err_out; | |
210 | for (i = 0; i < num_optkeys; i++) { | |
211 | /* Get the default class value for this option. */ | |
212 | py_str_as_str(PyList_GetItem(py_dec_optkeys, i), &key); | |
213 | if (!(py_optlist = PyDict_GetItemString(py_dec_options, key))) | |
214 | goto err_out; | |
215 | if (!(py_classval = PyList_GetItem(py_optlist, 1))) | |
216 | goto err_out; | |
217 | if (!PyUnicode_Check(py_classval) && !PyLong_Check(py_classval)) { | |
218 | srd_err("Options of type %s are not yet supported.", Py_TYPE(py_classval)->tp_name); | |
219 | goto err_out; | |
220 | } | |
221 | ||
222 | if ((value = g_hash_table_lookup(options, key))) { | |
223 | /* An override for this option was provided. */ | |
224 | if (PyUnicode_Check(py_classval)) { | |
225 | if (!(py_optval = PyUnicode_FromString(value))) { | |
226 | /* Some UTF-8 encoding error. */ | |
227 | PyErr_Clear(); | |
228 | goto err_out; | |
229 | } | |
230 | } else if (PyLong_Check(py_classval)) { | |
231 | if (!(py_optval = PyLong_FromString(value, NULL, 0))) { | |
232 | /* ValueError Exception */ | |
233 | PyErr_Clear(); | |
234 | srd_err("Option %s has invalid value %s: expected integer.", | |
235 | key, value); | |
236 | goto err_out; | |
237 | } | |
238 | } | |
239 | g_hash_table_remove(options, key); | |
240 | } else { | |
241 | /* Use the class default for this option. */ | |
242 | if (PyUnicode_Check(py_classval)) { | |
243 | /* Make a brand new copy of the string. */ | |
244 | py_ustr = PyUnicode_AS_UNICODE(py_classval); | |
245 | size = PyUnicode_GET_SIZE(py_classval); | |
246 | py_optval = PyUnicode_FromUnicode(py_ustr, size); | |
247 | } else if (PyLong_Check(py_classval)) { | |
248 | /* Make a brand new copy of the integer. */ | |
249 | val_ull = PyLong_AsUnsignedLongLong(py_classval); | |
250 | if (val_ull == (unsigned long long)-1) { | |
251 | /* OverFlowError exception */ | |
252 | PyErr_Clear(); | |
253 | srd_err("Invalid integer value for %s: expected integer.", key); | |
254 | goto err_out; | |
255 | } | |
256 | if (!(py_optval = PyLong_FromUnsignedLongLong(val_ull))) | |
257 | goto err_out; | |
258 | } | |
259 | } | |
260 | ||
261 | /* If we got here, py_optval holds a known good new reference | |
262 | * to the instance option to set. | |
263 | */ | |
264 | if (PyDict_SetItemString(py_di_options, key, py_optval) == -1) | |
265 | goto err_out; | |
266 | } | |
267 | ||
268 | ret = SRD_OK; | |
269 | ||
270 | err_out: | |
271 | Py_XDECREF(py_optlist); | |
272 | Py_XDECREF(py_di_options); | |
273 | Py_XDECREF(py_dec_optkeys); | |
274 | Py_XDECREF(py_dec_options); | |
275 | if (key) | |
276 | g_free(key); | |
277 | if (PyErr_Occurred()) | |
278 | catch_exception("Stray exception in srd_instance_set_options()."); | |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
283 | /* Helper GComparefunc for g_slist_find_custom() in srd_instance_set_probes() */ | |
284 | static gint compare_probe_id(struct srd_probe *a, char *probe_id) | |
285 | { | |
286 | ||
287 | return strcmp(a->id, probe_id); | |
288 | } | |
289 | ||
290 | /** | |
291 | * Set probes in a decoder instance. | |
292 | * | |
293 | * @param di Decoder instance. | |
294 | * @param probes A GHashTable of probes to set. Key is probe name, value is | |
295 | * the probe number. Samples passed to this instance will be arranged in this | |
296 | * order. | |
297 | * | |
298 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
299 | */ | |
300 | int srd_instance_set_probes(struct srd_decoder_instance *di, | |
301 | GHashTable *new_probes) | |
302 | { | |
303 | GList *l; | |
304 | GSList *sl; | |
305 | struct srd_probe *p; | |
306 | int *new_probemap, new_probenum; | |
307 | char *probe_id, *probenum_str; | |
308 | ||
309 | srd_dbg("set probes called for instance %s with list of %d probes", | |
310 | di->instance_id, g_hash_table_size(new_probes)); | |
311 | ||
312 | if (g_hash_table_size(new_probes) == 0) | |
313 | /* No probes provided. */ | |
314 | return SRD_OK; | |
315 | ||
316 | if(di->dec_num_probes == 0) { | |
317 | /* Decoder has no probes. */ | |
318 | srd_err("Protocol decoder %s has no probes to define.", | |
319 | di->decoder->name); | |
320 | return SRD_ERR_ARG; | |
321 | } | |
322 | ||
323 | new_probemap = NULL; | |
324 | ||
325 | if (!(new_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
326 | srd_err("Failed to malloc new probe map."); | |
327 | return SRD_ERR_MALLOC; | |
328 | } | |
329 | ||
330 | for (l = g_hash_table_get_keys(new_probes); l; l = l->next) { | |
331 | probe_id = l->data; | |
332 | probenum_str = g_hash_table_lookup(new_probes, probe_id); | |
333 | if (!probenum_str) { | |
334 | /* Probe name was specified without a value. */ | |
335 | srd_err("No probe number was specified for %s.", probe_id); | |
336 | g_free(new_probemap); | |
337 | return SRD_ERR_ARG; | |
338 | } | |
339 | new_probenum = strtol(probenum_str, NULL, 10); | |
340 | if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id, | |
341 | (GCompareFunc)compare_probe_id))) { | |
342 | /* Fall back on optional probes. */ | |
343 | if (!(sl = g_slist_find_custom(di->decoder->extra_probes, | |
344 | probe_id, (GCompareFunc)compare_probe_id))) { | |
345 | srd_err("Protocol decoder %s has no probe '%s'.", | |
346 | di->decoder->name, probe_id); | |
347 | g_free(new_probemap); | |
348 | return SRD_ERR_ARG; | |
349 | } | |
350 | } | |
351 | p = sl->data; | |
352 | new_probemap[p->order] = new_probenum; | |
353 | srd_dbg("setting probe mapping for %d = probe %d", p->order, new_probenum); | |
354 | } | |
355 | g_free(di->dec_probemap); | |
356 | di->dec_probemap = new_probemap; | |
357 | ||
358 | return SRD_OK; | |
359 | } | |
360 | ||
361 | /** | |
362 | * Create a new protocol decoder instance. | |
363 | * | |
364 | * @param id Decoder 'id' field. | |
365 | * @param options GHashtable of options which override the defaults set in | |
366 | * the decoder class. | |
367 | * @return Pointer to a newly allocated struct srd_decoder_instance, or | |
368 | * NULL in case of failure. | |
369 | */ | |
370 | struct srd_decoder_instance *srd_instance_new(const char *decoder_id, | |
371 | GHashTable *options) | |
372 | { | |
373 | struct srd_decoder *dec; | |
374 | struct srd_decoder_instance *di; | |
375 | int i; | |
376 | char *instance_id; | |
377 | ||
378 | srd_dbg("Creating new %s instance.", decoder_id); | |
379 | ||
380 | if (!(dec = srd_get_decoder_by_id(decoder_id))) { | |
381 | srd_err("Protocol decoder %s not found.", decoder_id); | |
382 | return NULL; | |
383 | } | |
384 | ||
385 | if (!(di = g_try_malloc0(sizeof(*di)))) { | |
386 | srd_err("Failed to malloc instance."); | |
387 | return NULL; | |
388 | } | |
389 | ||
390 | instance_id = g_hash_table_lookup(options, "id"); | |
391 | di->decoder = dec; | |
392 | di->instance_id = g_strdup(instance_id ? instance_id : decoder_id); | |
393 | g_hash_table_remove(options, "id"); | |
394 | ||
395 | /* Prepare a default probe map, where samples come in the | |
396 | * order in which the decoder class defined them. | |
397 | */ | |
398 | di->dec_num_probes = g_slist_length(di->decoder->probes) + | |
399 | g_slist_length(di->decoder->extra_probes); | |
400 | if (di->dec_num_probes) { | |
401 | if (!(di->dec_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) { | |
402 | srd_err("Failed to malloc probe map."); | |
403 | g_free(di); | |
404 | return NULL; | |
405 | } | |
406 | for (i = 0; i < di->dec_num_probes; i++) | |
407 | di->dec_probemap[i] = i; | |
408 | } | |
409 | ||
410 | /* Create a new instance of this decoder class. */ | |
411 | if (!(di->py_instance = PyObject_CallObject(dec->py_dec, NULL))) { | |
412 | if (PyErr_Occurred()) | |
413 | catch_exception("failed to create %s instance: ", decoder_id); | |
414 | g_free(di->dec_probemap); | |
415 | g_free(di); | |
416 | return NULL; | |
417 | } | |
418 | ||
419 | if (srd_instance_set_options(di, options) != SRD_OK) { | |
420 | g_free(di->dec_probemap); | |
421 | g_free(di); | |
422 | return NULL; | |
423 | } | |
424 | ||
425 | /* Instance takes input from a frontend by default. */ | |
426 | di_list = g_slist_append(di_list, di); | |
427 | ||
428 | return di; | |
429 | } | |
430 | ||
431 | int srd_instance_stack(struct srd_decoder_instance *di_from, | |
432 | struct srd_decoder_instance *di_to) | |
433 | { | |
434 | ||
435 | if (!di_from || !di_to) { | |
436 | srd_err("Invalid from/to instance pair."); | |
437 | return SRD_ERR_ARG; | |
438 | } | |
439 | ||
440 | if (g_slist_find(di_list, di_to)) { | |
441 | /* Remove from the unstacked list. */ | |
442 | di_list = g_slist_remove(di_list, di_to); | |
443 | } | |
444 | ||
445 | /* Stack on top of source di. */ | |
446 | di_from->next_di = g_slist_append(di_from->next_di, di_to); | |
447 | ||
448 | return SRD_OK; | |
449 | } | |
450 | ||
451 | /** | |
452 | * Finds a decoder instance by its instance id, but only in the bottom | |
453 | * level of instances -- instances already stacked on top of another one | |
454 | * will not be found. | |
455 | * | |
456 | * @param instance_id The instance id to be found. | |
457 | * | |
458 | * @return Pointer to struct srd_decoder_instance, or NULL if not found. | |
459 | */ | |
460 | struct srd_decoder_instance *srd_instance_find_by_id(char *instance_id) | |
461 | { | |
462 | GSList *l; | |
463 | struct srd_decoder_instance *tmp, *di; | |
464 | ||
465 | di = NULL; | |
466 | for (l = di_list; l; l = l->next) { | |
467 | tmp = l->data; | |
468 | if (!strcmp(tmp->instance_id, instance_id)) { | |
469 | di = tmp; | |
470 | break; | |
471 | } | |
472 | } | |
473 | ||
474 | return di; | |
475 | } | |
476 | ||
477 | /** | |
478 | * Finds a decoder instance by its python object, i.e. that instance's | |
479 | * instantiation of the sigrokdecode.Decoder class. This will recurse | |
480 | * to find the instance anywhere in the stack tree. | |
481 | * | |
482 | * @param stack Pointer to a GSList of struct srd_decoder_instance, | |
483 | * indicating the stack to search. To start searching at the bottom | |
484 | * level of decoder instances, pass NULL. | |
485 | * @param obj The python class instantiation. | |
486 | * | |
487 | * @return Pointer to struct srd_decoder_instance, or NULL if not found. | |
488 | */ | |
489 | struct srd_decoder_instance *srd_instance_find_by_obj(GSList *stack, | |
490 | PyObject *obj) | |
491 | { | |
492 | GSList *l; | |
493 | struct srd_decoder_instance *tmp, *di; | |
494 | ||
495 | di = NULL; | |
496 | for (l = stack ? stack : di_list; di == NULL && l != NULL; l = l->next) { | |
497 | tmp = l->data; | |
498 | if (tmp->py_instance == obj) | |
499 | di = tmp; | |
500 | else if (tmp->next_di) | |
501 | di = srd_instance_find_by_obj(tmp->next_di, obj); | |
502 | } | |
503 | ||
504 | return di; | |
505 | } | |
506 | ||
507 | int srd_instance_start(struct srd_decoder_instance *di, PyObject *args) | |
508 | { | |
509 | PyObject *py_name, *py_res; | |
510 | GSList *l; | |
511 | struct srd_decoder_instance *next_di; | |
512 | ||
513 | srd_dbg("Calling start() method on protocol decoder instance %s.", | |
514 | di->instance_id); | |
515 | ||
516 | if (!(py_name = PyUnicode_FromString("start"))) { | |
517 | srd_err("Unable to build python object for 'start'."); | |
518 | catch_exception("Protocol decoder instance %s: ", di->instance_id); | |
519 | return SRD_ERR_PYTHON; | |
520 | } | |
521 | ||
522 | if (!(py_res = PyObject_CallMethodObjArgs(di->py_instance, | |
523 | py_name, args, NULL))) { | |
524 | catch_exception("Protocol decoder instance %s: ", di->instance_id); | |
525 | return SRD_ERR_PYTHON; | |
526 | } | |
527 | ||
528 | Py_DecRef(py_res); | |
529 | Py_DecRef(py_name); | |
530 | ||
531 | /* Start all the PDs stacked on top of this one. Pass along the | |
532 | * metadata all the way from the bottom PD, even though it's only | |
533 | * applicable to logic data for now. | |
534 | */ | |
535 | for (l = di->next_di; l; l = l->next) { | |
536 | next_di = l->data; | |
537 | srd_instance_start(next_di, args); | |
538 | } | |
539 | ||
540 | return SRD_OK; | |
541 | } | |
542 | ||
543 | /** | |
544 | * Run the specified decoder function. | |
545 | * | |
546 | * @param start_samplenum The starting sample number for the buffer's sample | |
547 | * set, relative to the start of capture. | |
548 | * @param di The decoder instance to call. Must not be NULL. | |
549 | * @param inbuf The buffer to decode. Must not be NULL. | |
550 | * @param inbuflen Length of the buffer. Must be > 0. | |
551 | * | |
552 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
553 | */ | |
554 | int srd_instance_decode(uint64_t start_samplenum, | |
555 | struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen) | |
556 | { | |
557 | PyObject *py_res; | |
558 | srd_logic *logic; | |
559 | uint64_t end_samplenum; | |
560 | ||
561 | srd_dbg("Calling decode() on instance %s with %d bytes starting " | |
562 | "at sample %d.", di->instance_id, inbuflen, start_samplenum); | |
563 | ||
564 | /* Return an error upon unusable input. */ | |
565 | if (!di) { | |
566 | srd_dbg("empty decoder instance"); | |
567 | return SRD_ERR_ARG; | |
568 | } | |
569 | if (!inbuf) { | |
570 | srd_dbg("NULL buffer pointer"); | |
571 | return SRD_ERR_ARG; | |
572 | } | |
573 | if (inbuflen == 0) { | |
574 | srd_dbg("empty buffer"); | |
575 | return SRD_ERR_ARG; | |
576 | } | |
577 | ||
578 | /* Create new srd_logic object. Each iteration around the PD's loop | |
579 | * will fill one sample into this object. | |
580 | */ | |
581 | logic = PyObject_New(srd_logic, &srd_logic_type); | |
582 | Py_INCREF(logic); | |
583 | logic->di = di; | |
584 | logic->start_samplenum = start_samplenum; | |
585 | logic->itercnt = 0; | |
586 | logic->inbuf = inbuf; | |
587 | logic->inbuflen = inbuflen; | |
588 | logic->sample = PyList_New(2); | |
589 | Py_INCREF(logic->sample); | |
590 | ||
591 | Py_IncRef(di->py_instance); | |
592 | end_samplenum = start_samplenum + inbuflen / di->data_unitsize; | |
593 | if (!(py_res = PyObject_CallMethod(di->py_instance, "decode", | |
594 | "KKO", logic->start_samplenum, end_samplenum, logic))) { | |
595 | catch_exception("Protocol decoder instance %s: ", di->instance_id); | |
596 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
597 | } | |
598 | Py_DecRef(py_res); | |
599 | ||
600 | return SRD_OK; | |
601 | } | |
602 | ||
603 | ||
604 | int srd_session_start(int num_probes, int unitsize, uint64_t samplerate) | |
605 | { | |
606 | PyObject *args; | |
607 | GSList *d; | |
608 | struct srd_decoder_instance *di; | |
609 | int ret; | |
610 | ||
611 | srd_dbg("Calling start() on all instances with %d probes, " | |
612 | "unitsize %d samplerate %d.", num_probes, unitsize, samplerate); | |
613 | ||
614 | /* Currently only one item of metadata is passed along to decoders, | |
615 | * samplerate. This can be extended as needed. | |
616 | */ | |
617 | if (!(args = Py_BuildValue("{s:l}", "samplerate", (long)samplerate))) { | |
618 | srd_err("Unable to build python object for metadata."); | |
619 | return SRD_ERR_PYTHON; | |
620 | } | |
621 | ||
622 | /* Run the start() method on all decoders receiving frontend data. */ | |
623 | for (d = di_list; d; d = d->next) { | |
624 | di = d->data; | |
625 | di->data_num_probes = num_probes; | |
626 | di->data_unitsize = unitsize; | |
627 | di->data_samplerate = samplerate; | |
628 | if ((ret = srd_instance_start(di, args) != SRD_OK)) | |
629 | break; | |
630 | } | |
631 | ||
632 | Py_DecRef(args); | |
633 | ||
634 | return ret; | |
635 | } | |
636 | ||
637 | /* Feed logic samples to decoder session. */ | |
638 | int srd_session_feed(uint64_t start_samplenum, uint8_t *inbuf, uint64_t inbuflen) | |
639 | { | |
640 | GSList *d; | |
641 | int ret; | |
642 | ||
643 | srd_dbg("Calling decode() on all instances with starting sample " | |
644 | "number %"PRIu64", %"PRIu64" bytes at 0x%p", start_samplenum, | |
645 | inbuflen, inbuf); | |
646 | ||
647 | for (d = di_list; d; d = d->next) { | |
648 | if ((ret = srd_instance_decode(start_samplenum, d->data, inbuf, | |
649 | inbuflen)) != SRD_OK) | |
650 | return ret; | |
651 | } | |
652 | ||
653 | return SRD_OK; | |
654 | } | |
655 | ||
656 | ||
657 | int srd_register_callback(int output_type, void *cb) | |
658 | { | |
659 | struct srd_pd_callback *pd_cb; | |
660 | ||
661 | srd_dbg("Registering new callback for output type %d.", output_type); | |
662 | ||
663 | if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback)))) | |
664 | return SRD_ERR_MALLOC; | |
665 | ||
666 | pd_cb->output_type = output_type; | |
667 | pd_cb->callback = cb; | |
668 | callbacks = g_slist_append(callbacks, pd_cb); | |
669 | ||
670 | return SRD_OK; | |
671 | } | |
672 | ||
673 | void *srd_find_callback(int output_type) | |
674 | { | |
675 | GSList *l; | |
676 | struct srd_pd_callback *pd_cb; | |
677 | void *(cb); | |
678 | ||
679 | cb = NULL; | |
680 | for (l = callbacks; l; l = l->next) { | |
681 | pd_cb = l->data; | |
682 | if (pd_cb->output_type == output_type) { | |
683 | cb = pd_cb->callback; | |
684 | break; | |
685 | } | |
686 | } | |
687 | ||
688 | return cb; | |
689 | } | |
690 | ||
691 | ||
692 | /* This is the backend function to python sigrokdecode.add() call. */ | |
693 | int pd_add(struct srd_decoder_instance *di, int output_type, char *proto_id) | |
694 | { | |
695 | struct srd_pd_output *pdo; | |
696 | ||
697 | srd_dbg("Instance %s creating new output type %d for %s.", | |
698 | di->instance_id, output_type, proto_id); | |
699 | ||
700 | if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) | |
701 | return -1; | |
702 | ||
703 | /* pdo_id is just a simple index, nothing is deleted from this list anyway. */ | |
704 | pdo->pdo_id = g_slist_length(di->pd_output); | |
705 | pdo->output_type = output_type; | |
706 | pdo->di = di; | |
707 | pdo->proto_id = g_strdup(proto_id); | |
708 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
709 | ||
710 | return pdo->pdo_id; | |
711 | } | |
712 |