]> sigrok.org Git - libsigrokdecode.git/blame - libsigrokdecode.h
Fix inverted condition on decoder check
[libsigrokdecode.git] / libsigrokdecode.h
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1c6fa20f 1/*
50bd5d25 2 * This file is part of the libsigrokdecode project.
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3 *
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
bc5f5a43 5 * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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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 2 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, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
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22#ifndef LIBSIGROKDECODE_SIGROKDECODE_H
23#define LIBSIGROKDECODE_SIGROKDECODE_H
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24
25#include <Python.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
26#include <stdint.h>
5c55017c 27#include <glib.h>
1c6fa20f 28
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29#ifdef __cplusplus
30extern "C" {
31#endif
32
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33struct srd_session;
34
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35/**
36 * @file
37 *
38 * The public libsigrokdecode header file to be used by frontends.
39 *
40 * This is the only file that libsigrokdecode users (frontends) are supposed
41 * to use and include. There are other header files which get installed with
42 * libsigrokdecode, but those are not meant to be used directly by frontends.
43 *
44 * The correct way to get/use the libsigrokdecode API functions is:
45 *
46 * @code{.c}
c1f86f02 47 * #include <libsigrokdecode/libsigrokdecode.h>
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48 * @endcode
49 */
50
a4898be7 51/*
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52 * All possible return codes of libsigrokdecode functions must be listed here.
53 * Functions should never return hardcoded numbers as status, but rather
47dfa77d 54 * use these enum values. All error codes are negative numbers.
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55 *
56 * The error codes are globally unique in libsigrokdecode, i.e. if one of the
57 * libsigrokdecode functions returns a "malloc error" it must be exactly the
58 * same return value as used by all other functions to indicate "malloc error".
59 * There must be no functions which indicate two different errors via the
60 * same return code.
61 *
62 * Also, for compatibility reasons, no defined return codes are ever removed
47dfa77d 63 * or reused for different errors later. You can only add new entries and
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64 * return codes, but never remove or redefine existing ones.
65 */
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66
67/** Status/error codes returned by libsigrokdecode functions. */
68enum {
69 SRD_OK = 0, /**< No error */
70 SRD_ERR = -1, /**< Generic/unspecified error */
71 SRD_ERR_MALLOC = -2, /**< Malloc/calloc/realloc error */
72 SRD_ERR_ARG = -3, /**< Function argument error */
73 SRD_ERR_BUG = -4, /**< Errors hinting at internal bugs */
74 SRD_ERR_PYTHON = -5, /**< Python C API error */
75 SRD_ERR_DECODERS_DIR = -6, /**< Protocol decoder path invalid */
76
77 /*
78 * Note: When adding entries here, don't forget to also update the
79 * srd_strerror() and srd_strerror_name() functions in error.c.
80 */
81};
7c24d086 82
43c0a640 83/* libsigrokdecode loglevels. */
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84enum {
85 SRD_LOG_NONE = 0, /**< Output no messages at all. */
86 SRD_LOG_ERR = 1, /**< Output error messages. */
87 SRD_LOG_WARN = 2, /**< Output warnings. */
88 SRD_LOG_INFO = 3, /**< Output informational messages. */
89 SRD_LOG_DBG = 4, /**< Output debug messages. */
90 SRD_LOG_SPEW = 5, /**< Output very noisy debug messages. */
91};
43c0a640 92
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93/*
94 * Use SRD_API to mark public API symbols, and SRD_PRIV for private symbols.
95 *
96 * Variables and functions marked 'static' are private already and don't
d523eae6 97 * need SRD_PRIV. However, functions which are not static (because they need
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98 * to be used in other libsigrokdecode-internal files) but are also not
99 * meant to be part of the public libsigrokdecode API, must use SRD_PRIV.
100 *
101 * This uses the 'visibility' feature of gcc (requires gcc >= 4.0).
102 *
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103 * This feature is not available on MinGW/Windows, as it is a feature of
104 * ELF files and MinGW/Windows uses PE files.
105 *
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106 * Details: http://gcc.gnu.org/wiki/Visibility
107 */
108
109/* Marks public libsigrokdecode API symbols. */
a4cb05f7 110#ifndef _WIN32
55c3c5f4 111#define SRD_API __attribute__((visibility("default")))
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112#else
113#define SRD_API
114#endif
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115
116/* Marks private, non-public libsigrokdecode symbols (not part of the API). */
a4cb05f7 117#ifndef _WIN32
55c3c5f4 118#define SRD_PRIV __attribute__((visibility("hidden")))
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119#else
120#define SRD_PRIV
121#endif
55c3c5f4 122
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123/*
124 * When adding an output type, don't forget to...
125 * - expose it to PDs in controller.c:PyInit_sigrokdecode()
126 * - add a check in module_sigrokdecode.c:Decoder_put()
127 * - add a debug string in type_decoder.c:OUTPUT_TYPES
128 */
e5080882 129enum {
94d43b37 130 SRD_OUTPUT_ANN,
f2a5df42 131 SRD_OUTPUT_PYTHON,
15969949 132 SRD_OUTPUT_BINARY,
7ee0c40b 133 SRD_OUTPUT_META,
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134};
135
a61ece20 136#define SRD_MAX_NUM_PROBES 64
bc5f5a43 137
32cfb920 138enum {
ed416497 139 SRD_CONF_SAMPLERATE = 10000,
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140};
141
d752b12b 142struct srd_decoder {
775dda7a 143 /** The decoder ID. Must be non-NULL and unique for all decoders. */
31b82285 144 char *id;
775dda7a 145
361fdcaa 146 /** The (short) decoder name. Must be non-NULL. */
31b82285 147 char *name;
775dda7a 148
122e9a90 149 /** The (long) decoder name. Must be non-NULL. */
75a282e5 150 char *longname;
775dda7a 151
361fdcaa 152 /** A (short, one-line) description of the decoder. Must be non-NULL. */
5c55017c 153 char *desc;
775dda7a 154
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155 /**
156 * The license of the decoder. Valid values: "gplv2+", "gplv3+".
157 * Other values are currently not allowed. Must be non-NULL.
158 */
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159 char *license;
160
361fdcaa 161 /** List of probes required by this decoder. */
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162 GSList *probes;
163
361fdcaa 164 /** List of optional probes for this decoder. */
dcdf4883 165 GSList *opt_probes;
f38ec285 166
361fdcaa 167 /**
c9bfccc6 168 * List of NULL-terminated char[], containing descriptions of the
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169 * supported annotation output.
170 */
e97b6ef5 171 GSList *annotations;
15969949 172
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173 /**
174 * List of NULL-terminated char[], containing descriptions of the
175 * supported binary output.
176 */
177 GSList *binary;
178
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179 /** List of decoder options. */
180 GSList *options;
181
361fdcaa 182 /** Python module. */
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183 PyObject *py_mod;
184
361fdcaa 185 /** sigrokdecode.Decoder class. */
451680f1 186 PyObject *py_dec;
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187};
188
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189/**
190 * Structure which contains information about one protocol decoder probe.
191 * For example, I2C has two probes, SDA and SCL.
192 */
f38ec285 193struct srd_probe {
361fdcaa 194 /** The ID of the probe. Must be non-NULL. */
f38ec285 195 char *id;
361fdcaa 196 /** The name of the probe. Must not be NULL. */
f38ec285 197 char *name;
361fdcaa 198 /** The description of the probe. Must not be NULL. */
f38ec285 199 char *desc;
361fdcaa 200 /** The index of the probe, i.e. its order in the list of probes. */
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201 int order;
202};
203
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204struct srd_decoder_option {
205 char *id;
206 char *desc;
207 GVariant *def;
208};
209
a8b72b05 210struct srd_decoder_inst {
b2c19614 211 struct srd_decoder *decoder;
32cfb920 212 struct srd_session *sess;
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213 PyObject *py_inst;
214 char *inst_id;
b2c19614 215 GSList *pd_output;
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216 int dec_num_probes;
217 int *dec_probemap;
f38ec285 218 int data_unitsize;
7ce7775c 219 GSList *next_di;
31b82285 220};
221
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222struct srd_pd_output {
223 int pdo_id;
224 int output_type;
a8b72b05 225 struct srd_decoder_inst *di;
94d43b37 226 char *proto_id;
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227 /* Only used for OUTPUT_META. */
228 const GVariantType *meta_type;
229 char *meta_name;
230 char *meta_descr;
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231};
232
94d43b37 233struct srd_proto_data {
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234 uint64_t start_sample;
235 uint64_t end_sample;
236 struct srd_pd_output *pdo;
983cb0f5 237 void *data;
15969949 238};
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239struct srd_proto_data_annotation {
240 int ann_format;
241 char **ann_text;
242};
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243struct srd_proto_data_binary {
244 int bin_class;
245 uint64_t size;
246 const unsigned char *data;
247};
15969949 248
ae53d0a5 249typedef void (*srd_pd_output_callback_t)(struct srd_proto_data *pdata,
41a5d962 250 void *cb_data);
ae53d0a5 251
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252struct srd_pd_callback {
253 int output_type;
4c1d0670 254 srd_pd_output_callback_t cb;
41a5d962 255 void *cb_data;
983cb0f5 256};
bc5f5a43 257
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258/* Custom Python types: */
259
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260typedef struct {
261 PyObject_HEAD
262} srd_Decoder;
43c0a640 263
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264typedef struct {
265 PyObject_HEAD
a8b72b05 266 struct srd_decoder_inst *di;
86528298 267 uint64_t start_samplenum;
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268 unsigned int itercnt;
269 uint8_t *inbuf;
270 uint64_t inbuflen;
271 PyObject *sample;
272} srd_logic;
273
c9bfccc6 274
909fbf41 275/* srd.c */
abeeed8b 276SRD_API int srd_init(const char *path);
55c3c5f4 277SRD_API int srd_exit(void);
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278
279/* session.c */
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280SRD_API int srd_session_new(struct srd_session **sess);
281SRD_API int srd_session_start(struct srd_session *sess);
ed416497 282SRD_API int srd_session_metadata_set(struct srd_session *sess, int key,
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283 GVariant *data);
284SRD_API int srd_session_send(struct srd_session *sess,
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285 uint64_t start_samplenum, uint64_t end_samplenum,
286 const uint8_t *inbuf, uint64_t inbuflen);
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287SRD_API int srd_session_destroy(struct srd_session *sess);
288SRD_API int srd_pd_output_callback_add(struct srd_session *sess,
289 int output_type, srd_pd_output_callback_t cb, void *cb_data);
b2c19614 290
909fbf41 291/* decoder.c */
38ff5046 292SRD_API const GSList *srd_decoder_list(void);
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293SRD_API struct srd_decoder *srd_decoder_get_by_id(const char *id);
294SRD_API int srd_decoder_load(const char *name);
909fbf41 295SRD_API char *srd_decoder_doc_get(const struct srd_decoder *dec);
9d122fd5 296SRD_API int srd_decoder_unload(struct srd_decoder *dec);
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297SRD_API int srd_decoder_load_all(void);
298SRD_API int srd_decoder_unload_all(void);
b2c19614 299
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300/* instance.c */
301SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
302 GHashTable *options);
303SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di,
304 GHashTable *probes);
305SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess,
306 const char *id, GHashTable *options);
307SRD_API int srd_inst_stack(struct srd_session *sess,
308 struct srd_decoder_inst *di_from, struct srd_decoder_inst *di_to);
309SRD_API struct srd_decoder_inst *srd_inst_find_by_id(struct srd_session *sess,
310 const char *inst_id);
c9bfccc6 311
909fbf41 312/* log.c */
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313typedef int (*srd_log_callback_t)(void *cb_data, int loglevel,
314 const char *format, va_list args);
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315SRD_API int srd_log_loglevel_set(int loglevel);
316SRD_API int srd_log_loglevel_get(void);
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317SRD_API int srd_log_callback_set(srd_log_callback_t cb, void *cb_data);
318SRD_API int srd_log_callback_set_default(void);
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319SRD_API int srd_log_logdomain_set(const char *logdomain);
320SRD_API char *srd_log_logdomain_get(void);
1c6fa20f 321
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322/* error.c */
323SRD_API const char *srd_strerror(int error_code);
324SRD_API const char *srd_strerror_name(int error_code);
0c081c63 325
909fbf41 326/* version.c */
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327SRD_API int srd_package_version_major_get(void);
328SRD_API int srd_package_version_minor_get(void);
329SRD_API int srd_package_version_micro_get(void);
330SRD_API const char *srd_package_version_string_get(void);
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331SRD_API int srd_lib_version_current_get(void);
332SRD_API int srd_lib_version_revision_get(void);
333SRD_API int srd_lib_version_age_get(void);
334SRD_API const char *srd_lib_version_string_get(void);
335
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336#include "version.h"
337
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338#ifdef __cplusplus
339}
340#endif
341
1c6fa20f 342#endif