sigrokdecode.h.in

   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 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
  22 #ifndef LIBSIGROKDECODE_SIGROKDECODE_H
  23 #define LIBSIGROKDECODE_SIGROKDECODE_H
  24
  25 #include <Python.h> /* First, so we avoid a _POSIX_C_SOURCE warning. */
  26 #include <stdint.h>
  27 #include <glib.h>
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /*
  34  * Package version macros (can be used for conditional compilation).
  35  */
  36
  37 /** The libsigrokdecode package 'major' version number. */
  38 #define SRD_PACKAGE_VERSION_MAJOR @SRD_PACKAGE_VERSION_MAJOR@
  39
  40 /** The libsigrokdecode package 'minor' version number. */
  41 #define SRD_PACKAGE_VERSION_MINOR @SRD_PACKAGE_VERSION_MINOR@
  42
  43 /** The libsigrokdecode package 'micro' version number. */
  44 #define SRD_PACKAGE_VERSION_MICRO @SRD_PACKAGE_VERSION_MICRO@
  45
  46 /** The libsigrokdecode package version ("major.minor.micro") as string. */
  47 #define SRD_PACKAGE_VERSION_STRING "@SRD_PACKAGE_VERSION@"
  48
  49 /*
  50  * Library/libtool version macros (can be used for conditional compilation).
  51  */
  52
  53 /** The libsigrokdecode libtool 'current' version number. */
  54 #define SRD_LIB_VERSION_CURRENT @SRD_LIB_VERSION_CURRENT@
  55
  56 /** The libsigrokdecode libtool 'revision' version number. */
  57 #define SRD_LIB_VERSION_REVISION @SRD_LIB_VERSION_REVISION@
  58
  59 /** The libsigrokdecode libtool 'age' version number. */
  60 #define SRD_LIB_VERSION_AGE @SRD_LIB_VERSION_AGE@
  61
  62 /** The libsigrokdecode libtool version ("current:revision:age") as string. */
  63 #define SRD_LIB_VERSION_STRING "@SRD_LIB_VERSION@"
  64
  65 /*
  66  * Status/error codes returned by libsigrokdecode functions.
  67  *
  68  * All possible return codes of libsigrokdecode functions must be listed here.
  69  * Functions should never return hardcoded numbers as status, but rather
  70  * use these #defines instead. All error codes are negative numbers.
  71  *
  72  * The error codes are globally unique in libsigrokdecode, i.e. if one of the
  73  * libsigrokdecode functions returns a "malloc error" it must be exactly the
  74  * same return value as used by all other functions to indicate "malloc error".
  75  * There must be no functions which indicate two different errors via the
  76  * same return code.
  77  *
  78  * Also, for compatibility reasons, no defined return codes are ever removed
  79  * or reused for different #defines later. You can only add new #defines and
  80  * return codes, but never remove or redefine existing ones.
  81  */
  82 #define SRD_OK                 0 /**< No error */
  83 #define SRD_ERR               -1 /**< Generic/unspecified error */
  84 #define SRD_ERR_MALLOC        -2 /**< Malloc/calloc/realloc error */
  85 #define SRD_ERR_ARG           -3 /**< Function argument error */
  86 #define SRD_ERR_BUG           -4 /**< Errors hinting at internal bugs */
  87 #define SRD_ERR_PYTHON        -5 /**< Python C API error */
  88 #define SRD_ERR_DECODERS_DIR  -6 /**< Protocol decoder path invalid */
  89
  90 /* libsigrokdecode loglevels. */
  91 #define SRD_LOG_NONE   0 /**< Output no messages at all. */
  92 #define SRD_LOG_ERR    1 /**< Output error messages. */
  93 #define SRD_LOG_WARN   2 /**< Output warnings. */
  94 #define SRD_LOG_INFO   3 /**< Output informational messages. */
  95 #define SRD_LOG_DBG    4 /**< Output debug messages. */
  96 #define SRD_LOG_SPEW   5 /**< Output very noisy debug messages. */
  97
  98 /*
  99  * Use SRD_API to mark public API symbols, and SRD_PRIV for private symbols.
 100  *
 101  * Variables and functions marked 'static' are private already and don't
 102  * need SR_PRIV. However, functions which are not static (because they need
 103  * to be used in other libsigrokdecode-internal files) but are also not
 104  * meant to be part of the public libsigrokdecode API, must use SRD_PRIV.
 105  *
 106  * This uses the 'visibility' feature of gcc (requires gcc >= 4.0).
 107  *
 108  * This feature is not available on MinGW/Windows, as it is a feature of
 109  * ELF files and MinGW/Windows uses PE files.
 110  *
 111  * Details: http://gcc.gnu.org/wiki/Visibility
 112  */
 113
 114 /* Marks public libsigrokdecode API symbols. */
 115 #ifndef _WIN32
 116 #define SRD_API __attribute__((visibility("default")))
 117 #else
 118 #define SRD_API
 119 #endif
 120
 121 /* Marks private, non-public libsigrokdecode symbols (not part of the API). */
 122 #ifndef _WIN32
 123 #define SRD_PRIV __attribute__((visibility("hidden")))
 124 #else
 125 #define SRD_PRIV
 126 #endif
 127
 128 /*
 129  * When adding an output type, don't forget to...
 130  *   - expose it to PDs in controller.c:PyInit_sigrokdecode()
 131  *   - add a check in module_sigrokdecode.c:Decoder_put()
 132  *   - add a debug string in type_decoder.c:OUTPUT_TYPES
 133  */
 134 enum {
 135         SRD_OUTPUT_ANN,
 136         SRD_OUTPUT_PROTO,
 137         SRD_OUTPUT_BINARY,
 138 };
 139
 140 #define SRD_MAX_NUM_PROBES 64
 141
 142 /* TODO: Documentation. */
 143 struct srd_decoder {
 144         /** The decoder ID. Must be non-NULL and unique for all decoders. */
 145         char *id;
 146
 147         /** The (short) decoder name. Must be non-NULL. */
 148         char *name;
 149
 150         /** The (long) decoder name. Must be non-NULL. */
 151         char *longname;
 152
 153         /** A (short, one-line) description of the decoder. Must be non-NULL. */
 154         char *desc;
 155
 156         /**
 157          * The license of the decoder. Valid values: "gplv2+", "gplv3+".
 158          * Other values are currently not allowed. Must be non-NULL.
 159          */
 160         char *license;
 161
 162         /** List of probes required by this decoder. */
 163         GSList *probes;
 164
 165         /** List of optional probes for this decoder. */
 166         GSList *opt_probes;
 167
 168         /**
 169          * List of NULL-terminated char[], containing descriptions of the
 170          * supported annotation output.
 171          */
 172         GSList *annotations;
 173
 174         /** Python module. */
 175         PyObject *py_mod;
 176
 177         /** sigrokdecode.Decoder class. */
 178         PyObject *py_dec;
 179 };
 180
 181 /**
 182  * Structure which contains information about one protocol decoder probe.
 183  * For example, I2C has two probes, SDA and SCL.
 184  */
 185 struct srd_probe {
 186         /** The ID of the probe. Must be non-NULL. */
 187         char *id;
 188         /** The name of the probe. Must not be NULL. */
 189         char *name;
 190         /** The description of the probe. Must not be NULL. */
 191         char *desc;
 192         /** The index of the probe, i.e. its order in the list of probes. */
 193         int order;
 194 };
 195
 196 struct srd_decoder_inst {
 197         struct srd_decoder *decoder;
 198         PyObject *py_inst;
 199         char *inst_id;
 200         GSList *pd_output;
 201         int dec_num_probes;
 202         int *dec_probemap;
 203         int data_num_probes;
 204         int data_unitsize;
 205         uint64_t data_samplerate;
 206         GSList *next_di;
 207 };
 208
 209 struct srd_pd_output {
 210         int pdo_id;
 211         int output_type;
 212         struct srd_decoder_inst *di;
 213         char *proto_id;
 214 };
 215
 216 struct srd_proto_data {
 217         uint64_t start_sample;
 218         uint64_t end_sample;
 219         struct srd_pd_output *pdo;
 220         int ann_format;
 221         void *data;
 222 };
 223
 224 typedef void (*srd_pd_output_callback_t)(struct srd_proto_data *pdata,
 225                                          void *cb_data);
 226
 227 struct srd_pd_callback {
 228         int output_type;
 229         srd_pd_output_callback_t cb;
 230         void *cb_data;
 231 };
 232
 233 /* Custom Python types: */
 234
 235 typedef struct {
 236         PyObject_HEAD
 237 } srd_Decoder;
 238
 239 typedef struct {
 240         PyObject_HEAD
 241         struct srd_decoder_inst *di;
 242         uint64_t start_samplenum;
 243         unsigned int itercnt;
 244         uint8_t *inbuf;
 245         uint64_t inbuflen;
 246         PyObject *sample;
 247 } srd_logic;
 248
 249 /*--- controller.c ----------------------------------------------------------*/
 250
 251 SRD_API int srd_init(const char *path);
 252 SRD_API int srd_exit(void);
 253 SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
 254                                 GHashTable *options);
 255 SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di,
 256                                    GHashTable *probes);
 257 SRD_API struct srd_decoder_inst *srd_inst_new(const char *id,
 258                                               GHashTable *options);
 259 SRD_API int srd_inst_stack(struct srd_decoder_inst *di_from,
 260                            struct srd_decoder_inst *di_to);
 261 SRD_API struct srd_decoder_inst *srd_inst_find_by_id(const char *inst_id);
 262 SRD_API int srd_session_start(int num_probes, int unitsize,
 263                               uint64_t samplerate);
 264 SRD_API int srd_session_send(uint64_t start_samplenum, const uint8_t *inbuf,
 265                              uint64_t inbuflen);
 266 SRD_API int srd_pd_output_callback_add(int output_type,
 267                                 srd_pd_output_callback_t cb, void *cb_data);
 268
 269 /*--- decoder.c -------------------------------------------------------------*/
 270
 271 SRD_API GSList *srd_decoder_list(void);
 272 SRD_API struct srd_decoder *srd_decoder_get_by_id(const char *id);
 273 SRD_API int srd_decoder_load(const char *name);
 274 SRD_API int srd_decoder_unload(struct srd_decoder *dec);
 275 SRD_API int srd_decoder_load_all(void);
 276 SRD_API int srd_decoder_unload_all(void);
 277 SRD_API char *srd_decoder_doc_get(const struct srd_decoder *dec);
 278
 279 /*--- log.c -----------------------------------------------------------------*/
 280
 281 typedef int (*srd_log_callback_t)(void *cb_data, int loglevel,
 282                                   const char *format, va_list args);
 283
 284 SRD_API int srd_log_loglevel_set(int loglevel);
 285 SRD_API int srd_log_loglevel_get(void);
 286 SRD_API int srd_log_callback_set(srd_log_callback_t cb, void *cb_data);
 287 SRD_API int srd_log_callback_set_default(void);
 288 SRD_API int srd_log_logdomain_set(const char *logdomain);
 289 SRD_API char *srd_log_logdomain_get(void);
 290
 291 /*--- version.c -------------------------------------------------------------*/
 292
 293 SRD_API int srd_package_version_major_get(void);
 294 SRD_API int srd_package_version_minor_get(void);
 295 SRD_API int srd_package_version_micro_get(void);
 296 SRD_API const char *srd_package_version_string_get(void);
 297
 298 SRD_API int srd_lib_version_current_get(void);
 299 SRD_API int srd_lib_version_revision_get(void);
 300 SRD_API int srd_lib_version_age_get(void);
 301 SRD_API const char *srd_lib_version_string_get(void);
 302
 303 #ifdef __cplusplus
 304 }
 305 #endif
 306
 307 #endif