2 * This file is part of the libsigrokdecode project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
5 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
21 #include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
22 #include "libsigrokdecode-internal.h"
29 * @mainpage libsigrokdecode API
31 * @section sec_intro Introduction
33 * The <a href="http://sigrok.org">sigrok</a> project aims at creating a
34 * portable, cross-platform, Free/Libre/Open-Source signal analysis software
35 * suite that supports various device types (such as logic analyzers,
36 * oscilloscopes, multimeters, and more).
38 * <a href="http://sigrok.org/wiki/Libsigrokdecode">libsigrokdecode</a> is a
39 * shared library written in C which provides the basic API for (streaming)
40 * protocol decoding functionality.
42 * The <a href="http://sigrok.org/wiki/Protocol_decoders">protocol decoders</a>
43 * are written in Python (>= 3.0).
45 * @section sec_api API reference
47 * See the "Modules" page for an introduction to various libsigrokdecode
48 * related topics and the detailed API documentation of the respective
51 * You can also browse the API documentation by file, or review all
54 * @section sec_mailinglists Mailing lists
56 * There are two mailing lists for sigrok/libsigrokdecode: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a> and <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-commits">sigrok-commits</a>.
58 * @section sec_irc IRC
60 * You can find the sigrok developers in the
61 * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a>
62 * IRC channel on Freenode.
64 * @section sec_website Website
66 * <a href="http://sigrok.org/wiki/Libsigrokdecode">sigrok.org/wiki/Libsigrokdecode</a>
72 * Initializing and shutting down libsigrokdecode.
76 * @defgroup grp_init Initialization
78 * Initializing and shutting down libsigrokdecode.
80 * Before using any of the libsigrokdecode functionality, srd_init() must
81 * be called to initialize the library.
83 * When libsigrokdecode functionality is no longer needed, srd_exit() should
89 /* List of decoder instances. */
90 static GSList *di_list = NULL;
92 /* List of frontend callbacks to receive decoder output. */
93 static GSList *callbacks = NULL;
98 extern SRD_PRIV GSList *pd_list;
100 /* module_sigrokdecode.c */
101 extern PyMODINIT_FUNC PyInit_sigrokdecode(void);
104 extern SRD_PRIV PyTypeObject srd_logic_type;
109 * Initialize libsigrokdecode.
111 * This initializes the Python interpreter, and creates and initializes
112 * a "sigrokdecode" Python module.
114 * Then, it searches for sigrok protocol decoders in the "decoders"
115 * subdirectory of the the libsigrokdecode installation directory.
116 * All decoders that are found are loaded into memory and added to an
117 * internal list of decoders, which can be queried via srd_decoder_list().
119 * The caller is responsible for calling the clean-up function srd_exit(),
120 * which will properly shut down libsigrokdecode and free its allocated memory.
122 * Multiple calls to srd_init(), without calling srd_exit() in between,
125 * @param path Path to an extra directory containing protocol decoders
126 * which will be added to the Python sys.path. May be NULL.
128 * @return SRD_OK upon success, a (negative) error code otherwise.
129 * Upon Python errors, SRD_ERR_PYTHON is returned. If the decoders
130 * directory cannot be accessed, SRD_ERR_DECODERS_DIR is returned.
131 * If not enough memory could be allocated, SRD_ERR_MALLOC is returned.
135 SRD_API int srd_init(const char *path)
140 srd_dbg("Initializing libsigrokdecode.");
142 /* Add our own module to the list of built-in modules. */
143 PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
145 /* Initialize the Python interpreter. */
148 /* Installed decoders. */
149 if ((ret = srd_decoder_searchpath_add(DECODERS_DIR)) != SRD_OK) {
154 /* Path specified by the user. */
156 if ((ret = srd_decoder_searchpath_add(path)) != SRD_OK) {
162 /* Environment variable overrides everything, for debugging. */
163 if ((env_path = getenv("SIGROKDECODE_DIR"))) {
164 if ((ret = srd_decoder_searchpath_add(env_path)) != SRD_OK) {
174 * Shutdown libsigrokdecode.
176 * This frees all the memory allocated for protocol decoders and shuts down
177 * the Python interpreter.
179 * This function should only be called if there was a (successful!) invocation
180 * of srd_init() before. Calling this function multiple times in a row, without
181 * any successful srd_init() calls in between, is not allowed.
183 * @return SRD_OK upon success, a (negative) error code otherwise.
187 SRD_API int srd_exit(void)
189 srd_dbg("Exiting libsigrokdecode.");
191 srd_decoder_unload_all();
192 g_slist_free(pd_list);
195 /* Py_Finalize() returns void, any finalization errors are ignored. */
202 * Add an additional search directory for the protocol decoders.
204 * The specified directory is prepended (not appended!) to Python's sys.path,
205 * in order to search for sigrok protocol decoders in the specified
206 * directories first, and in the generic Python module directories (and in
207 * the current working directory) last. This avoids conflicts if there are
208 * Python modules which have the same name as a sigrok protocol decoder in
209 * sys.path or in the current working directory.
211 * @param path Path to the directory containing protocol decoders which shall
212 * be added to the Python sys.path, or NULL.
214 * @return SRD_OK upon success, a (negative) error code otherwise.
220 SRD_PRIV int srd_decoder_searchpath_add(const char *path)
222 PyObject *py_cur_path, *py_item;
225 wchar_t *wc_new_path;
228 srd_dbg("Adding '%s' to module path.", path);
230 new_path = g_string_sized_new(256);
231 g_string_assign(new_path, path);
232 py_cur_path = PySys_GetObject("path");
233 for (i = 0; i < PyList_Size(py_cur_path); i++) {
234 g_string_append(new_path, G_SEARCHPATH_SEPARATOR_S);
235 py_item = PyList_GetItem(py_cur_path, i);
236 if (!PyUnicode_Check(py_item))
237 /* Shouldn't happen. */
239 if (py_str_as_str(py_item, &item) != SRD_OK)
241 g_string_append(new_path, item);
245 /* Convert to wide chars. */
246 wc_len = sizeof(wchar_t) * (new_path->len + 1);
247 if (!(wc_new_path = g_try_malloc(wc_len))) {
248 srd_dbg("malloc failed");
249 return SRD_ERR_MALLOC;
251 mbstowcs(wc_new_path, new_path->str, wc_len);
252 PySys_SetPath(wc_new_path);
253 g_string_free(new_path, TRUE);
262 * @defgroup grp_instances Decoder instances
264 * Decoder instance handling.
270 * Set one or more options in a decoder instance.
272 * Handled options are removed from the hash.
274 * @param di Decoder instance.
275 * @param options A GHashTable of options to set.
277 * @return SRD_OK upon success, a (negative) error code otherwise.
281 SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
284 PyObject *py_dec_options, *py_dec_optkeys, *py_di_options, *py_optval;
285 PyObject *py_optlist, *py_classval;
288 unsigned long long int val_ull;
290 int num_optkeys, ret, size, i;
294 if (!PyObject_HasAttrString(di->decoder->py_dec, "options")) {
295 /* Decoder has no options. */
296 if (g_hash_table_size(options) == 0) {
297 /* No options provided. */
300 srd_err("Protocol decoder has no options.");
306 ret = SRD_ERR_PYTHON;
308 py_dec_options = py_dec_optkeys = py_di_options = py_optval = NULL;
309 py_optlist = py_classval = NULL;
310 py_dec_options = PyObject_GetAttrString(di->decoder->py_dec, "options");
312 /* All of these are synthesized objects, so they're good. */
313 py_dec_optkeys = PyDict_Keys(py_dec_options);
314 num_optkeys = PyList_Size(py_dec_optkeys);
315 if (!(py_di_options = PyObject_GetAttrString(di->py_inst, "options")))
317 for (i = 0; i < num_optkeys; i++) {
318 /* Get the default class value for this option. */
319 py_str_as_str(PyList_GetItem(py_dec_optkeys, i), &key);
320 if (!(py_optlist = PyDict_GetItemString(py_dec_options, key)))
322 if (!(py_classval = PyList_GetItem(py_optlist, 1)))
324 if (!PyUnicode_Check(py_classval) && !PyLong_Check(py_classval)) {
325 srd_err("Options of type %s are not yet supported.",
326 Py_TYPE(py_classval)->tp_name);
330 if ((value = g_hash_table_lookup(options, key))) {
331 dbg = g_variant_print(value, TRUE);
332 srd_dbg("got option '%s' = %s", key, dbg);
334 /* An override for this option was provided. */
335 if (PyUnicode_Check(py_classval)) {
336 if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING)) {
337 srd_err("Option '%s' requires a string value.", key);
340 val_str = g_variant_get_string(value, NULL);
341 if (!(py_optval = PyUnicode_FromString(val_str))) {
342 /* Some UTF-8 encoding error. */
344 srd_err("Option '%s' requires a UTF-8 string value.", key);
347 } else if (PyLong_Check(py_classval)) {
348 if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT64)) {
349 srd_err("Option '%s' requires an integer value.", key);
352 val_int = g_variant_get_int64(value);
353 if (!(py_optval = PyLong_FromLong(val_int))) {
354 /* ValueError Exception */
356 srd_err("Option '%s' has invalid integer value.", key);
360 g_hash_table_remove(options, key);
362 /* Use the class default for this option. */
363 if (PyUnicode_Check(py_classval)) {
364 /* Make a brand new copy of the string. */
365 py_ustr = PyUnicode_AS_UNICODE(py_classval);
366 size = PyUnicode_GET_SIZE(py_classval);
367 py_optval = PyUnicode_FromUnicode(py_ustr, size);
368 } else if (PyLong_Check(py_classval)) {
369 /* Make a brand new copy of the integer. */
370 val_ull = PyLong_AsUnsignedLongLong(py_classval);
371 if (val_ull == (unsigned long long)-1) {
372 /* OverFlowError exception */
374 srd_err("Invalid integer value for %s: "
375 "expected integer.", key);
378 if (!(py_optval = PyLong_FromUnsignedLongLong(val_ull)))
384 * If we got here, py_optval holds a known good new reference
385 * to the instance option to set.
387 if (PyDict_SetItemString(py_di_options, key, py_optval) == -1)
396 Py_XDECREF(py_optlist);
397 Py_XDECREF(py_di_options);
398 Py_XDECREF(py_dec_optkeys);
399 Py_XDECREF(py_dec_options);
401 if (PyErr_Occurred())
402 srd_exception_catch("Stray exception in srd_inst_option_set().");
407 /* Helper GComparefunc for g_slist_find_custom() in srd_inst_probe_set_all() */
408 static gint compare_probe_id(const struct srd_probe *a, const char *probe_id)
410 return strcmp(a->id, probe_id);
414 * Set all probes in a decoder instance.
416 * This function sets _all_ probes for the specified decoder instance, i.e.,
417 * it overwrites any probes that were already defined (if any).
419 * @param di Decoder instance.
420 * @param new_probes A GHashTable of probes to set. Key is probe name, value is
421 * the probe number. Samples passed to this instance will be
422 * arranged in this order.
424 * @return SRD_OK upon success, a (negative) error code otherwise.
428 SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di,
429 GHashTable *new_probes)
435 int *new_probemap, new_probenum;
437 int i, num_required_probes;
439 srd_dbg("set probes called for instance %s with list of %d probes",
440 di->inst_id, g_hash_table_size(new_probes));
442 if (g_hash_table_size(new_probes) == 0)
443 /* No probes provided. */
446 if (di->dec_num_probes == 0) {
447 /* Decoder has no probes. */
448 srd_err("Protocol decoder %s has no probes to define.",
455 if (!(new_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) {
456 srd_err("Failed to g_malloc() new probe map.");
457 return SRD_ERR_MALLOC;
461 * For now, map all indexes to probe -1 (can be overridden later).
462 * This -1 is interpreted as an unspecified probe later.
464 for (i = 0; i < di->dec_num_probes; i++)
465 new_probemap[i] = -1;
467 for (l = g_hash_table_get_keys(new_probes); l; l = l->next) {
469 probe_val= g_hash_table_lookup(new_probes, probe_id);
470 if (!g_variant_is_of_type(probe_val, G_VARIANT_TYPE_INT32)) {
471 /* Probe name was specified without a value. */
472 srd_err("No probe number was specified for %s.",
474 g_free(new_probemap);
477 new_probenum = g_variant_get_int32(probe_val);
478 if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id,
479 (GCompareFunc)compare_probe_id))) {
480 /* Fall back on optional probes. */
481 if (!(sl = g_slist_find_custom(di->decoder->opt_probes,
482 probe_id, (GCompareFunc) compare_probe_id))) {
483 srd_err("Protocol decoder %s has no probe "
484 "'%s'.", di->decoder->name, probe_id);
485 g_free(new_probemap);
490 new_probemap[p->order] = new_probenum;
491 srd_dbg("Setting probe mapping: %s (index %d) = probe %d.",
492 p->id, p->order, new_probenum);
495 srd_dbg("Final probe map:");
496 num_required_probes = g_slist_length(di->decoder->probes);
497 for (i = 0; i < di->dec_num_probes; i++) {
498 srd_dbg(" - index %d = probe %d (%s)", i, new_probemap[i],
499 (i < num_required_probes) ? "required" : "optional");
502 g_free(di->dec_probemap);
503 di->dec_probemap = new_probemap;
509 * Create a new protocol decoder instance.
511 * @param decoder_id Decoder 'id' field.
512 * @param options GHashtable of options which override the defaults set in
513 * the decoder class. May be NULL.
515 * @return Pointer to a newly allocated struct srd_decoder_inst, or
516 * NULL in case of failure.
520 SRD_API struct srd_decoder_inst *srd_inst_new(const char *decoder_id,
524 struct srd_decoder *dec;
525 struct srd_decoder_inst *di;
528 srd_dbg("Creating new %s instance.", decoder_id);
530 if (!(dec = srd_decoder_get_by_id(decoder_id))) {
531 srd_err("Protocol decoder %s not found.", decoder_id);
535 if (!(di = g_try_malloc0(sizeof(struct srd_decoder_inst)))) {
536 srd_err("Failed to g_malloc() instance.");
542 inst_id = g_hash_table_lookup(options, "id");
543 di->inst_id = g_strdup(inst_id ? inst_id : decoder_id);
544 g_hash_table_remove(options, "id");
546 di->inst_id = g_strdup(decoder_id);
549 * Prepare a default probe map, where samples come in the
550 * order in which the decoder class defined them.
552 di->dec_num_probes = g_slist_length(di->decoder->probes) +
553 g_slist_length(di->decoder->opt_probes);
554 if (di->dec_num_probes) {
555 if (!(di->dec_probemap =
556 g_try_malloc(sizeof(int) * di->dec_num_probes))) {
557 srd_err("Failed to g_malloc() probe map.");
561 for (i = 0; i < di->dec_num_probes; i++)
562 di->dec_probemap[i] = i;
565 /* Create a new instance of this decoder class. */
566 if (!(di->py_inst = PyObject_CallObject(dec->py_dec, NULL))) {
567 if (PyErr_Occurred())
568 srd_exception_catch("failed to create %s instance: ",
570 g_free(di->dec_probemap);
575 if (options && srd_inst_option_set(di, options) != SRD_OK) {
576 g_free(di->dec_probemap);
581 /* Instance takes input from a frontend by default. */
582 di_list = g_slist_append(di_list, di);
588 * Stack a decoder instance on top of another.
590 * @param di_from The instance to move.
591 * @param di_to The instance on top of which di_from will be stacked.
593 * @return SRD_OK upon success, a (negative) error code otherwise.
597 SRD_API int srd_inst_stack(struct srd_decoder_inst *di_from,
598 struct srd_decoder_inst *di_to)
600 if (!di_from || !di_to) {
601 srd_err("Invalid from/to instance pair.");
605 if (g_slist_find(di_list, di_to)) {
606 /* Remove from the unstacked list. */
607 di_list = g_slist_remove(di_list, di_to);
610 /* Stack on top of source di. */
611 di_from->next_di = g_slist_append(di_from->next_di, di_to);
617 * Find a decoder instance by its instance ID.
619 * Only the bottom level of instances are searched -- instances already stacked
620 * on top of another one will not be found.
622 * @param inst_id The instance ID to be found.
624 * @return Pointer to struct srd_decoder_inst, or NULL if not found.
628 SRD_API struct srd_decoder_inst *srd_inst_find_by_id(const char *inst_id)
631 struct srd_decoder_inst *tmp, *di;
634 for (l = di_list; l; l = l->next) {
636 if (!strcmp(tmp->inst_id, inst_id)) {
646 * Find a decoder instance by its Python object.
648 * I.e. find that instance's instantiation of the sigrokdecode.Decoder class.
649 * This will recurse to find the instance anywhere in the stack tree.
651 * @param stack Pointer to a GSList of struct srd_decoder_inst, indicating the
652 * stack to search. To start searching at the bottom level of
653 * decoder instances, pass NULL.
654 * @param obj The Python class instantiation.
656 * @return Pointer to struct srd_decoder_inst, or NULL if not found.
662 SRD_PRIV struct srd_decoder_inst *srd_inst_find_by_obj(const GSList *stack,
666 struct srd_decoder_inst *tmp, *di;
669 for (l = stack ? stack : di_list; di == NULL && l != NULL; l = l->next) {
671 if (tmp->py_inst == obj)
673 else if (tmp->next_di)
674 di = srd_inst_find_by_obj(tmp->next_di, obj);
681 SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di, PyObject *args)
683 PyObject *py_name, *py_res;
685 struct srd_decoder_inst *next_di;
687 srd_dbg("Calling start() method on protocol decoder instance %s.",
690 if (!(py_name = PyUnicode_FromString("start"))) {
691 srd_err("Unable to build Python object for 'start'.");
692 srd_exception_catch("Protocol decoder instance %s: ",
694 return SRD_ERR_PYTHON;
697 if (!(py_res = PyObject_CallMethodObjArgs(di->py_inst,
698 py_name, args, NULL))) {
699 srd_exception_catch("Protocol decoder instance %s: ",
701 return SRD_ERR_PYTHON;
708 * Start all the PDs stacked on top of this one. Pass along the
709 * metadata all the way from the bottom PD, even though it's only
710 * applicable to logic data for now.
712 for (l = di->next_di; l; l = l->next) {
714 srd_inst_start(next_di, args);
721 * Run the specified decoder function.
723 * @param start_samplenum The starting sample number for the buffer's sample
724 * set, relative to the start of capture.
725 * @param di The decoder instance to call. Must not be NULL.
726 * @param inbuf The buffer to decode. Must not be NULL.
727 * @param inbuflen Length of the buffer. Must be > 0.
729 * @return SRD_OK upon success, a (negative) error code otherwise.
735 SRD_PRIV int srd_inst_decode(uint64_t start_samplenum,
736 const struct srd_decoder_inst *di, const uint8_t *inbuf,
741 uint64_t end_samplenum;
743 srd_dbg("Calling decode() on instance %s with %d bytes starting "
744 "at sample %d.", di->inst_id, inbuflen, start_samplenum);
746 /* Return an error upon unusable input. */
748 srd_dbg("empty decoder instance");
752 srd_dbg("NULL buffer pointer");
756 srd_dbg("empty buffer");
761 * Create new srd_logic object. Each iteration around the PD's loop
762 * will fill one sample into this object.
764 logic = PyObject_New(srd_logic, &srd_logic_type);
766 logic->di = (struct srd_decoder_inst *)di;
767 logic->start_samplenum = start_samplenum;
769 logic->inbuf = (uint8_t *)inbuf;
770 logic->inbuflen = inbuflen;
771 logic->sample = PyList_New(2);
772 Py_INCREF(logic->sample);
774 Py_IncRef(di->py_inst);
775 end_samplenum = start_samplenum + inbuflen / di->data_unitsize;
776 if (!(py_res = PyObject_CallMethod(di->py_inst, "decode",
777 "KKO", logic->start_samplenum,
778 end_samplenum, logic))) {
779 srd_exception_catch("Protocol decoder instance %s: ",
781 return SRD_ERR_PYTHON;
789 SRD_PRIV void srd_inst_free(struct srd_decoder_inst *di)
792 struct srd_pd_output *pdo;
794 srd_dbg("Freeing instance %s", di->inst_id);
796 Py_DecRef(di->py_inst);
798 g_free(di->dec_probemap);
799 g_slist_free(di->next_di);
800 for (l = di->pd_output; l; l = l->next) {
802 g_free(pdo->proto_id);
805 g_slist_free(di->pd_output);
810 SRD_PRIV void srd_inst_free_all(GSList *stack)
813 struct srd_decoder_inst *di;
816 for (l = stack ? stack : di_list; di == NULL && l != NULL; l = l->next) {
819 srd_inst_free_all(di->next_di);
823 g_slist_free(di_list);
831 * @defgroup grp_session Session handling
833 * Starting and handling decoding sessions.
839 * Start a decoding session.
841 * Decoders, instances and stack must have been prepared beforehand.
843 * @param num_probes The number of probes which the incoming feed will contain.
844 * @param unitsize The number of bytes per sample in the incoming feed.
845 * @param samplerate The samplerate of the incoming feed.
847 * @return SRD_OK upon success, a (negative) error code otherwise.
851 SRD_API int srd_session_start(int num_probes, int unitsize, uint64_t samplerate)
855 struct srd_decoder_inst *di;
860 srd_dbg("Calling start() on all instances with %d probes, "
861 "unitsize %d samplerate %d.", num_probes, unitsize, samplerate);
864 * Currently only one item of metadata is passed along to decoders,
865 * samplerate. This can be extended as needed.
867 if (!(args = Py_BuildValue("{s:l}", "samplerate", (long)samplerate))) {
868 srd_err("Unable to build Python object for metadata.");
869 return SRD_ERR_PYTHON;
872 /* Run the start() method on all decoders receiving frontend data. */
873 for (d = di_list; d; d = d->next) {
875 di->data_num_probes = num_probes;
876 di->data_unitsize = unitsize;
877 di->data_samplerate = samplerate;
878 if ((ret = srd_inst_start(di, args)) != SRD_OK)
888 * Send a chunk of logic sample data to a running decoder session.
890 * @param start_samplenum The sample number of the first sample in this chunk.
891 * @param inbuf Pointer to sample data.
892 * @param inbuflen Length in bytes of the buffer.
894 * @return SRD_OK upon success, a (negative) error code otherwise.
898 SRD_API int srd_session_send(uint64_t start_samplenum, const uint8_t *inbuf,
904 srd_dbg("Calling decode() on all instances with starting sample "
905 "number %" PRIu64 ", %" PRIu64 " bytes at 0x%p",
906 start_samplenum, inbuflen, inbuf);
908 for (d = di_list; d; d = d->next) {
909 if ((ret = srd_inst_decode(start_samplenum, d->data, inbuf,
910 inbuflen)) != SRD_OK)
918 * Register/add a decoder output callback function.
920 * The function will be called when a protocol decoder sends output back
921 * to the PD controller (except for Python objects, which only go up the
924 * @param output_type The output type this callback will receive. Only one
925 * callback per output type can be registered.
926 * @param cb The function to call. Must not be NULL.
927 * @param cb_data Private data for the callback function. Can be NULL.
931 SRD_API int srd_pd_output_callback_add(int output_type,
932 srd_pd_output_callback_t cb, void *cb_data)
934 struct srd_pd_callback *pd_cb;
936 srd_dbg("Registering new callback for output type %d.", output_type);
938 if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback)))) {
939 srd_err("Failed to g_malloc() struct srd_pd_callback.");
940 return SRD_ERR_MALLOC;
943 pd_cb->output_type = output_type;
945 pd_cb->cb_data = cb_data;
946 callbacks = g_slist_append(callbacks, pd_cb);
952 SRD_PRIV struct srd_pd_callback *srd_pd_output_callback_find(int output_type)
955 struct srd_pd_callback *tmp, *pd_cb;
958 for (l = callbacks; l; l = l->next) {
960 if (tmp->output_type == output_type) {
969 /* This is the backend function to Python sigrokdecode.add() call. */
971 SRD_PRIV int srd_inst_pd_output_add(struct srd_decoder_inst *di,
972 int output_type, const char *proto_id)
974 struct srd_pd_output *pdo;
976 srd_dbg("Instance %s creating new output type %d for %s.",
977 di->inst_id, output_type, proto_id);
979 if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) {
980 srd_err("Failed to g_malloc() struct srd_pd_output.");
984 /* pdo_id is just a simple index, nothing is deleted from this list anyway. */
985 pdo->pdo_id = g_slist_length(di->pd_output);
986 pdo->output_type = output_type;
988 pdo->proto_id = g_strdup(proto_id);
989 di->pd_output = g_slist_append(di->pd_output, pdo);