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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 | /* TODO | |
28 | static GSList *pipelines = NULL; | |
29 | struct srd_pipeline { | |
30 | int id; | |
31 | GSList *decoders; | |
32 | }; | |
33 | */ | |
34 | ||
35 | /* lives in decoder.c */ | |
36 | extern GSList *pd_list; | |
37 | extern GSList *di_list; | |
38 | ||
39 | /* lives in module_sigrokdecode.c */ | |
40 | extern PyMODINIT_FUNC PyInit_sigrokdecode(void); | |
41 | ||
42 | /* lives in type_logic.c */ | |
43 | extern PyTypeObject srd_logic_type; | |
44 | ||
45 | ||
46 | /** | |
47 | * Initialize libsigrokdecode. | |
48 | * | |
49 | * This initializes the Python interpreter, and creates and initializes | |
50 | * a "sigrok" Python module with a single put() method. | |
51 | * | |
52 | * Then, it searches for sigrok protocol decoder files (*.py) in the | |
53 | * "decoders" subdirectory of the the sigrok installation directory. | |
54 | * All decoders that are found are loaded into memory and added to an | |
55 | * internal list of decoders, which can be queried via srd_list_decoders(). | |
56 | * | |
57 | * The caller is responsible for calling the clean-up function srd_exit(), | |
58 | * which will properly shut down libsigrokdecode and free its allocated memory. | |
59 | * | |
60 | * Multiple calls to srd_init(), without calling srd_exit() inbetween, | |
61 | * are not allowed. | |
62 | * | |
63 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
64 | * Upon Python errors, return SRD_ERR_PYTHON. If the sigrok decoders | |
65 | * directory cannot be accessed, return SRD_ERR_DECODERS_DIR. | |
66 | * If not enough memory could be allocated, return SRD_ERR_MALLOC. | |
67 | */ | |
68 | int srd_init(void) | |
69 | { | |
70 | int ret; | |
71 | ||
72 | PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode); | |
73 | ||
74 | /* Py_Initialize() returns void and usually cannot fail. */ | |
75 | Py_Initialize(); | |
76 | ||
77 | if ((ret = set_modulepath()) != SRD_OK) { | |
78 | Py_Finalize(); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | if ((ret = srd_load_all_decoders()) != SRD_OK) { | |
83 | Py_Finalize(); | |
84 | return ret; | |
85 | } | |
86 | ||
87 | return SRD_OK; | |
88 | } | |
89 | ||
90 | ||
91 | /** | |
92 | * Shutdown libsigrokdecode. | |
93 | * | |
94 | * This frees all the memory allocated for protocol decoders and shuts down | |
95 | * the Python interpreter. | |
96 | * | |
97 | * This function should only be called if there was a (successful!) invocation | |
98 | * of srd_init() before. Calling this function multiple times in a row, without | |
99 | * any successful srd_init() calls inbetween, is not allowed. | |
100 | * | |
101 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
102 | */ | |
103 | int srd_exit(void) | |
104 | { | |
105 | /* Unload/free all decoders, and then the list of decoders itself. */ | |
106 | /* TODO: Error handling. */ | |
107 | srd_unload_all_decoders(); | |
108 | g_slist_free(pd_list); | |
109 | ||
110 | /* Py_Finalize() returns void, any finalization errors are ignored. */ | |
111 | Py_Finalize(); | |
112 | ||
113 | return SRD_OK; | |
114 | } | |
115 | ||
116 | ||
117 | /** | |
118 | * Add search directories for the protocol decoders. | |
119 | * | |
120 | * TODO: add path from env var SIGROKDECODE_PATH, config etc | |
121 | */ | |
122 | int set_modulepath(void) | |
123 | { | |
124 | int ret; | |
125 | ||
126 | PyRun_SimpleString("import sys"); | |
127 | ret = PyRun_SimpleString("sys.path.append(r'" DECODERS_DIR "');"); | |
128 | ||
129 | return ret; | |
130 | } | |
131 | ||
132 | ||
133 | struct srd_decoder_instance *srd_instance_new(const char *id) | |
134 | { | |
135 | struct srd_decoder *dec; | |
136 | struct srd_decoder_instance *di; | |
137 | PyObject *py_args; | |
138 | ||
139 | fprintf(stdout, "%s: %s\n", __func__, id); | |
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 | fprintf(stdout, "%s\n", __func__); | |
204 | ||
205 | for (d = di_list; d; d = d->next) { | |
206 | di = d->data; | |
207 | di->num_probes = num_probes; | |
208 | di->unitsize = unitsize; | |
209 | di->samplerate = samplerate; | |
210 | if (!(py_res = PyObject_CallMethod(di->py_instance, "start", | |
211 | "{s:l}", | |
212 | "samplerate", (long)samplerate))) { | |
213 | if (PyErr_Occurred()) | |
214 | PyErr_Print(); /* Returns void. */ | |
215 | ||
216 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
217 | } | |
218 | Py_XDECREF(py_res); | |
219 | } | |
220 | ||
221 | return SRD_OK; | |
222 | } | |
223 | ||
224 | ||
225 | /** | |
226 | * Run the specified decoder function. | |
227 | * | |
228 | * @param dec TODO | |
229 | * @param inbuf TODO | |
230 | * @param inbuflen TODO | |
231 | * | |
232 | * @return SRD_OK upon success, a (negative) error code otherwise. | |
233 | */ | |
234 | int srd_run_decoder(uint64_t timeoffset, uint64_t duration, | |
235 | struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen) | |
236 | { | |
237 | PyObject *py_instance, *py_res; | |
238 | srd_logic *logic; | |
239 | ||
240 | /* Return an error upon unusable input. */ | |
241 | if (di == NULL) | |
242 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
243 | if (inbuf == NULL) | |
244 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
245 | if (inbuflen == 0) /* No point in working on empty buffers. */ | |
246 | return SRD_ERR_ARG; /* TODO: More specific error? */ | |
247 | ||
248 | /* TODO: Error handling. */ | |
249 | py_instance = di->py_instance; | |
250 | Py_XINCREF(py_instance); | |
251 | ||
252 | logic = PyObject_New(srd_logic, &srd_logic_type); | |
253 | Py_INCREF(logic); | |
254 | logic->di = di; | |
255 | logic->itercnt = 0; | |
256 | logic->inbuf = inbuf; | |
257 | logic->inbuflen = inbuflen; | |
258 | logic->sample = PyList_New(2); | |
259 | Py_INCREF(logic->sample); | |
260 | ||
261 | if (!(py_res = PyObject_CallMethod(py_instance, "decode", | |
262 | "KKO", timeoffset, duration, logic))) { | |
263 | if (PyErr_Occurred()) | |
264 | PyErr_Print(); /* Returns void. */ | |
265 | ||
266 | return SRD_ERR_PYTHON; /* TODO: More specific error? */ | |
267 | } | |
268 | ||
269 | Py_XDECREF(py_res); | |
270 | ||
271 | return SRD_OK; | |
272 | } | |
273 | ||
274 | ||
275 | /* Feed logic samples to decoder session. */ | |
276 | int srd_session_feed(uint64_t timeoffset, uint64_t duration, uint8_t *inbuf, | |
277 | uint64_t inbuflen) | |
278 | { | |
279 | GSList *d; | |
280 | int ret; | |
281 | ||
282 | // fprintf(stdout, "%s: %d bytes\n", __func__, inbuflen); | |
283 | ||
284 | for (d = di_list; d; d = d->next) { | |
285 | if ((ret = srd_run_decoder(timeoffset, duration, d->data, inbuf, | |
286 | inbuflen)) != SRD_OK) | |
287 | return ret; | |
288 | } | |
289 | ||
290 | return SRD_OK; | |
291 | } | |
292 | ||
293 | ||
294 | int pd_output_new(struct srd_decoder_instance *di, int output_type, | |
295 | char *protocol_id, char *description) | |
296 | { | |
297 | GSList *l; | |
298 | struct srd_pd_output *pdo; | |
299 | int pdo_id; | |
300 | ||
301 | fprintf(stdout, "%s: output type %d, protocol_id %s, description %s\n", | |
302 | __func__, output_type, protocol_id, description); | |
303 | ||
304 | pdo_id = -1; | |
305 | for (l = di->pd_output; l; l = l->next) { | |
306 | pdo = l->data; | |
307 | if (pdo->pdo_id > pdo_id) | |
308 | pdo_id = pdo->pdo_id; | |
309 | } | |
310 | pdo_id++; | |
311 | ||
312 | if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) | |
313 | return -1; | |
314 | ||
315 | pdo->pdo_id = pdo_id; | |
316 | pdo->output_type = output_type; | |
317 | pdo->protocol_id = g_strdup(protocol_id); | |
318 | pdo->description = g_strdup(description); | |
319 | di->pd_output = g_slist_append(di->pd_output, pdo); | |
320 | ||
321 | return pdo_id; | |
322 | } | |
323 | ||
324 | struct srd_decoder_instance *get_di_by_decobject(void *decobject) | |
325 | { | |
326 | GSList *l; | |
327 | struct srd_decoder_instance *di; | |
328 | ||
329 | for (l = di_list; l; l = l->next) { | |
330 | di = l->data; | |
331 | if (decobject == di->py_instance) | |
332 | return di; | |
333 | } | |
334 | ||
335 | return NULL; | |
336 | } | |
337 | ||
338 | ||
339 | //int srd_pipeline_new(int plid) | |
340 | //{ | |
341 | // | |
342 | // | |
343 | //} | |
344 | ||
345 | ||
346 | ||
347 |