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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 "config.h" | |
22 | #include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */ | |
23 | #include <glib.h> | |
24 | #include <inttypes.h> | |
25 | ||
26 | ||
27 | static GSList *callbacks = NULL; | |
28 | ||
29 | /* TODO | |
30 | static GSList *pipelines = NULL; | |
31 | struct srd_pipeline { | |
32 | int id; | |
33 | GSList *decoders; | |
34 | }; | |
35 | */ | |
36 | ||
37 | /* lives in decoder.c */ | |
38 | extern GSList *pd_list; | |
39 | extern GSList *di_list; | |
40 | ||
41 | /* lives in module_sigrokdecode.c */ | |
42 | extern PyMODINIT_FUNC PyInit_sigrokdecode(void); | |
43 | ||
44 | /* lives in type_logic.c */ | |
45 | extern PyTypeObject srd_logic_type; | |
46 | ||
47 | ||
48 | /** | |
49 | * Initialize libsigrokdecode. | |
50 | * | |
51 | * This initializes the Python interpreter, and creates and initializes | |
52 | * a "sigrok" Python module with a single put() method. | |
53 | * | |
54 | * Then, it searches for sigrok protocol decoder files (*.py) in the | |
55 | * "decoders" subdirectory of the the sigrok installation directory. | |
56 | * All decoders that are found are loaded into memory and added to an | |
57 | * internal list of decoders, which can be queried via srd_list_decoders(). | |
58 | * | |
59 | * The caller is responsible for calling the clean-up function srd_exit(), | |
60 | * which will properly shut down libsigrokdecode and free its allocated memory. | |
61 | * | |
62 | * Multiple calls to srd_init(), without calling srd_exit() inbetween, | |
63 | * are not allowed. | |
64 | * | |
65 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
66 | * Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders | |
67 | * directory cannot be accessed, return SRD_ERR_DECODERS_DIR. | |
68 | * If not enough memory could be allocated, return SRD_ERR_MALLOC. | |
69 | */ | |
70 | int srd_init(void) | |
71 | { | |
72 | int ret; | |
73 | ||
74 | PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode); | |
75 | ||
76 | /* Py_Initialize() returns void and usually cannot fail. */ | |
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 inbetween, is not allowed. | |
102 | * | |
103 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
104 | */ | |
105 | int srd_exit(void) | |
106 | { | |
107 | /* Unload/free all decoders, and then the list of decoders itself. */ | |
108 | /* TODO: Error handling. */ | |
109 | srd_unload_all_decoders(); | |
110 | g_slist_free(pd_list); | |
111 | ||
112 | /* Py_Finalize() returns void, any finalization errors are ignored. */ | |
113 | Py_Finalize(); | |
114 | ||
115 | return SRD_OK; | |
116 | } | |
117 | ||
118 | ||
119 | /** | |
120 | * Add search directories for the protocol decoders. | |
121 | * | |
122 | * TODO: add path from env var SIGROKDECODE_PATH, config etc | |
123 | */ | |
124 | int set_modulepath(void) | |
125 | { | |
126 | int ret; | |
127 | ||
128 | PyRun_SimpleString("import sys"); | |
129 | ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');"); | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | ||
135 | struct srd_decoder_instance *srd_instance_new(const char *id) | |
136 | { | |
137 | struct srd_decoder *dec; | |
138 | struct srd_decoder_instance *di; | |
139 | PyObject *py_args; | |
140 | ||
141 | if (!(dec = srd_get_decoder_by_id(id))) | |
142 | return NULL; | |
143 | ||
144 | /* TODO: Error handling. Use g_try_malloc(). */ | |
145 | di = g_malloc(sizeof(*di)); | |
146 | di->decoder = dec; | |
147 | di->pd_output = NULL; | |
148 | di->unitsize = 0; | |
149 | ||
150 | /* Create an empty Python tuple. */ | |
151 | if (!(py_args = PyTuple_New(0))) { /* NEWREF */ | |
152 | if (PyErr_Occurred()) | |
153 | PyErr_Print(); /* Returns void. */ | |
154 | ||
155 | return NULL; /* TODO: More specific error? */ | |
156 | } | |
157 | ||
158 | /* Create an instance of the 'Decoder' class. */ | |
159 | di->py_instance = PyObject_Call(dec->py_decobj, py_args, NULL); | |
160 | if (!di->py_instance) { | |
161 | if (PyErr_Occurred()) | |
162 | PyErr_Print(); /* Returns void. */ | |
163 | Py_XDECREF(py_args); | |
164 | return NULL; /* TODO: More specific error? */ | |
165 | } | |
166 | di_list = g_slist_append(di_list, di); | |
167 | ||
168 | Py_XDECREF(py_args); | |
169 | ||
170 | return di; | |
171 | } | |
172 | ||
173 | ||
174 | int srd_instance_set_probe(struct srd_decoder_instance *di, | |
175 | const char *probename, int num) | |
176 | { | |
177 | PyObject *probedict, *probenum; | |
178 | ||
179 | probedict = PyObject_GetAttrString(di->py_instance, "probes"); /* NEWREF */ | |
180 | if (!probedict) { | |
181 | if (PyErr_Occurred()) | |
182 | PyErr_Print(); /* Returns void. */ | |
183 | ||
184 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
185 | } | |
186 | ||
187 | probenum = PyLong_FromLong(num); | |
188 | PyMapping_SetItemString(probedict, (char *)probename, probenum); | |
189 | ||
190 | Py_XDECREF(probenum); | |
191 | Py_XDECREF(probedict); | |
192 | ||
193 | return SRD_OK; | |
194 | } | |
195 | ||
196 | ||
197 | int srd_session_start(int num_probes, int unitsize, uint64_t samplerate) | |
198 | { | |
199 | PyObject *py_res; | |
200 | GSList *d; | |
201 | struct srd_decoder_instance *di; | |
202 | ||
203 | for (d = di_list; d; d = d->next) { | |
204 | di = d->data; | |
205 | di->num_probes = num_probes; | |
206 | di->unitsize = unitsize; | |
207 | di->samplerate = samplerate; | |
208 | if (!(py_res = PyObject_CallMethod(di->py_instance, "start", | |
209 | "{s:l}", | |
210 | "samplerate", (long)samplerate))) { | |
211 | if (PyErr_Occurred()) | |
212 | PyErr_Print(); /* Returns void. */ | |
213 | ||
214 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
215 | } | |
216 | Py_XDECREF(py_res); | |
217 | } | |
218 | ||
219 | return SRD_OK; | |
220 | } | |
221 | ||
222 | ||
223 | /** | |
224 | * Run the specified decoder function. | |
225 | * | |
226 | * @param dec TODO | |
227 | * @param inbuf TODO | |
228 | * @param inbuflen TODO | |
229 | * | |
230 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
231 | */ | |
232 | int srd_run_decoder(uint64_t timeoffset, uint64_t duration, | |
233 | struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen) | |
234 | { | |
235 | PyObject *py_instance, *py_res; | |
236 | srd_logic *logic; | |
237 | ||
238 | /* Return an error upon unusable input. */ | |
239 | if (di == NULL) | |
240 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
241 | if (inbuf == NULL) | |
242 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
243 | if (inbuflen == 0) /* No point in working on empty buffers. */ | |
244 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
245 | ||
246 | /* TODO: Error handling. */ | |
247 | py_instance = di->py_instance; | |
248 | Py_XINCREF(py_instance); | |
249 | ||
250 | logic = PyObject_New(srd_logic, &srd_logic_type); | |
251 | Py_INCREF(logic); | |
252 | logic->di = di; | |
253 | logic->itercnt = 0; | |
254 | logic->inbuf = inbuf; | |
255 | logic->inbuflen = inbuflen; | |
256 | logic->sample = PyList_New(2); | |
257 | Py_INCREF(logic->sample); | |
258 | ||
259 | if (!(py_res = PyObject_CallMethod(py_instance, "decode", | |
260 | "KKO", timeoffset, duration, logic))) { | |
261 | if (PyErr_Occurred()) | |
262 | PyErr_Print(); /* Returns void. */ | |
263 | ||
264 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
265 | } | |
266 | ||
267 | Py_XDECREF(py_res); | |
268 | ||
269 | return SRD_OK; | |
270 | } | |
271 | ||
272 | ||
273 | /* Feed logic samples to decoder session. */ | |
274 | int srd_session_feed(uint64_t timeoffset, uint64_t duration, uint8_t *inbuf, | |
275 | uint64_t inbuflen) | |
276 | { | |
277 | GSList *d; | |
278 | int ret; | |
279 | ||
280 | for (d = di_list; d; d = d->next) { | |
281 | if ((ret = srd_run_decoder(timeoffset, duration, d->data, inbuf, | |
282 | inbuflen)) != SRD_OK) | |
283 | return ret; | |
284 | } | |
285 | ||
286 | return SRD_OK; | |
287 | } | |
288 | ||
289 | ||
290 | int pd_add(struct srd_decoder_instance *di, int output_type, | |
291 | char *protocol_id) | |
292 | { | |
293 | struct srd_pd_output *pdo; | |
294 | ||
295 | if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) | |
296 | return -1; | |
297 | ||
298 | /* pdo_id is just a simple index, nothing is deleted from this list anyway. */ | |
299 | pdo->pdo_id = g_slist_length(di->pd_output); | |
300 | pdo->output_type = output_type; | |
301 | pdo->decoder = di->decoder; | |
302 | pdo->protocol_id = g_strdup(protocol_id); | |
303 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
304 | ||
305 | return pdo->pdo_id; | |
306 | } | |
307 | ||
308 | struct srd_decoder_instance *get_di_by_decobject(void *decobject) | |
309 | { | |
310 | GSList *l; | |
311 | struct srd_decoder_instance *di; | |
312 | ||
313 | for (l = di_list; l; l = l->next) { | |
314 | di = l->data; | |
315 | if (decobject == di->py_instance) | |
316 | return di; | |
317 | } | |
318 | ||
319 | return NULL; | |
320 | } | |
321 | ||
322 | int srd_register_callback(int output_type, void *cb) | |
323 | { | |
324 | struct srd_pd_callback *pd_cb; | |
325 | ||
326 | if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback)))) | |
327 | return SRD_ERR_MALLOC; | |
328 | ||
329 | pd_cb->output_type = output_type; | |
330 | pd_cb->callback = cb; | |
331 | callbacks = g_slist_append(callbacks, pd_cb); | |
332 | ||
333 | return SRD_OK; | |
334 | } | |
335 | ||
336 | void *srd_find_callback(int output_type) | |
337 | { | |
338 | GSList *l; | |
339 | struct srd_pd_callback *pd_cb; | |
340 | void *(cb); | |
341 | ||
342 | cb = NULL; | |
343 | for (l = callbacks; l; l = l->next) { | |
344 | pd_cb = l->data; | |
345 | if (pd_cb->output_type == output_type) { | |
346 | cb = pd_cb->callback; | |
347 | break; | |
348 | } | |
349 | } | |
350 | ||
351 | return cb; | |
352 | } | |
353 | ||
354 | //int srd_pipeline_new(int plid) | |
355 | //{ | |
356 | // | |
357 | // | |
358 | //} | |
359 | ||
360 | ||
361 | ||
362 |