#include <stdlib.h>
#include <stdint.h>
-/**
- * @mainpage libsigrokdecode API
- *
- * @section sec_intro Introduction
- *
- * The <a href="http://sigrok.org">sigrok</a> project aims at creating a
- * portable, cross-platform, Free/Libre/Open-Source signal analysis software
- * suite that supports various device types (such as logic analyzers,
- * oscilloscopes, multimeters, and more).
- *
- * <a href="http://sigrok.org/wiki/Libsigrokdecode">libsigrokdecode</a> is a
- * shared library written in C which provides the basic API for (streaming)
- * protocol decoding functionality.
- *
- * The <a href="http://sigrok.org/wiki/Protocol_decoders">protocol decoders</a>
- * are written in Python (>= 3.0).
- *
- * @section sec_api API reference
- *
- * See the "Modules" page for an introduction to various libsigrokdecode
- * related topics and the detailed API documentation of the respective
- * functions.
- *
- * You can also browse the API documentation by file, or review all
- * data structures.
- *
- * @section sec_mailinglists Mailing lists
- *
- * 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>.
- *
- * @section sec_irc IRC
- *
- * You can find the sigrok developers in the
- * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a>
- * IRC channel on Freenode.
- *
- * @section sec_website Website
- *
- * <a href="http://sigrok.org/wiki/Libsigrokdecode">sigrok.org/wiki/Libsigrokdecode</a>
- */
-
-/**
- * @file
- *
- * Initializing and shutting down libsigrokdecode.
- */
-
-/**
- * @defgroup grp_init Initialization
- *
- * Initializing and shutting down libsigrokdecode.
- *
- * Before using any of the libsigrokdecode functionality, srd_init() must
- * be called to initialize the library.
- *
- * When libsigrokdecode functionality is no longer needed, srd_exit() should
- * be called.
- *
- * @{
- */
-
/** @cond PRIVATE */
-SRD_PRIV GSList *sessions = NULL;
-static int max_session_id = -1;
-
-static int session_is_valid(struct srd_session *sess);
-
-/* decoder.c */
-extern SRD_PRIV GSList *pd_list;
-
-/* module_sigrokdecode.c */
-extern PyMODINIT_FUNC PyInit_sigrokdecode(void);
+extern GSList *sessions;
/* type_logic.c */
extern SRD_PRIV PyTypeObject srd_logic_type;
/** @endcond */
/**
- * Initialize libsigrokdecode.
- *
- * This initializes the Python interpreter, and creates and initializes
- * a "sigrokdecode" Python module.
- *
- * Then, it searches for sigrok protocol decoders in the "decoders"
- * subdirectory of the the libsigrokdecode installation directory.
- * All decoders that are found are loaded into memory and added to an
- * internal list of decoders, which can be queried via srd_decoder_list().
- *
- * The caller is responsible for calling the clean-up function srd_exit(),
- * which will properly shut down libsigrokdecode and free its allocated memory.
- *
- * Multiple calls to srd_init(), without calling srd_exit() in between,
- * are not allowed.
- *
- * @param path Path to an extra directory containing protocol decoders
- * which will be added to the Python sys.path. May be NULL.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- * Upon Python errors, SRD_ERR_PYTHON is returned. If the decoders
- * directory cannot be accessed, SRD_ERR_DECODERS_DIR is returned.
- * If not enough memory could be allocated, SRD_ERR_MALLOC is returned.
- *
- * @since 0.1.0
- */
-SRD_API int srd_init(const char *path)
-{
- int ret;
- char *env_path;
-
- if (max_session_id != -1) {
- srd_err("libsigrokdecode is already initialized.");
- return SRD_ERR;
- }
-
- srd_dbg("Initializing libsigrokdecode.");
-
- /* Add our own module to the list of built-in modules. */
- PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
-
- /* Initialize the Python interpreter. */
- Py_Initialize();
-
- /* Installed decoders. */
- if ((ret = srd_decoder_searchpath_add(DECODERS_DIR)) != SRD_OK) {
- Py_Finalize();
- return ret;
- }
-
- /* Path specified by the user. */
- if (path) {
- if ((ret = srd_decoder_searchpath_add(path)) != SRD_OK) {
- Py_Finalize();
- return ret;
- }
- }
-
- /* Environment variable overrides everything, for debugging. */
- if ((env_path = getenv("SIGROKDECODE_DIR"))) {
- if ((ret = srd_decoder_searchpath_add(env_path)) != SRD_OK) {
- Py_Finalize();
- return ret;
- }
- }
-
- max_session_id = 0;
-
- return SRD_OK;
-}
-
-/**
- * Shutdown libsigrokdecode.
- *
- * This frees all the memory allocated for protocol decoders and shuts down
- * the Python interpreter.
- *
- * This function should only be called if there was a (successful!) invocation
- * of srd_init() before. Calling this function multiple times in a row, without
- * any successful srd_init() calls in between, is not allowed.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.1.0
- */
-SRD_API int srd_exit(void)
-{
- GSList *l;
-
- srd_dbg("Exiting libsigrokdecode.");
-
- for (l = sessions; l; l = l->next)
- srd_session_destroy((struct srd_session *)l->data);
-
- srd_decoder_unload_all();
- g_slist_free(pd_list);
- pd_list = NULL;
-
- /* Py_Finalize() returns void, any finalization errors are ignored. */
- Py_Finalize();
-
- max_session_id = -1;
-
- return SRD_OK;
-}
-
-/**
- * Add an additional search directory for the protocol decoders.
- *
- * The specified directory is prepended (not appended!) to Python's sys.path,
- * in order to search for sigrok protocol decoders in the specified
- * directories first, and in the generic Python module directories (and in
- * the current working directory) last. This avoids conflicts if there are
- * Python modules which have the same name as a sigrok protocol decoder in
- * sys.path or in the current working directory.
- *
- * @param path Path to the directory containing protocol decoders which shall
- * be added to the Python sys.path, or NULL.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @private
+ * @file
*
- * @since 0.1.0
+ * Decoder instance handling.
*/
-SRD_PRIV int srd_decoder_searchpath_add(const char *path)
-{
- PyObject *py_cur_path, *py_item;
- GString *new_path;
- int wc_len, i;
- wchar_t *wc_new_path;
- char *item;
-
- srd_dbg("Adding '%s' to module path.", path);
-
- new_path = g_string_sized_new(256);
- g_string_assign(new_path, path);
- py_cur_path = PySys_GetObject("path");
- for (i = 0; i < PyList_Size(py_cur_path); i++) {
- g_string_append(new_path, G_SEARCHPATH_SEPARATOR_S);
- py_item = PyList_GetItem(py_cur_path, i);
- if (!PyUnicode_Check(py_item))
- /* Shouldn't happen. */
- continue;
- if (py_str_as_str(py_item, &item) != SRD_OK)
- continue;
- g_string_append(new_path, item);
- g_free(item);
- }
-
- /* Convert to wide chars. */
- wc_len = sizeof(wchar_t) * (new_path->len + 1);
- if (!(wc_new_path = g_try_malloc(wc_len))) {
- srd_dbg("malloc failed");
- return SRD_ERR_MALLOC;
- }
- mbstowcs(wc_new_path, new_path->str, wc_len);
- PySys_SetPath(wc_new_path);
- g_string_free(new_path, TRUE);
- g_free(wc_new_path);
-
- return SRD_OK;
-}
-
-/** @} */
/**
* @defgroup grp_instances Decoder instances
const char *val_str;
char *dbg, *key;
+ if (!di) {
+ srd_err("Invalid decoder instance.");
+ return SRD_ERR_ARG;
+ }
+
+ if (!options) {
+ srd_err("Invalid options GHashTable.");
+ return SRD_ERR_ARG;
+ }
+
if (!PyObject_HasAttrString(di->decoder->py_dec, "options")) {
/* Decoder has no options. */
if (g_hash_table_size(options) == 0) {
GList *l;
GSList *sl;
struct srd_probe *p;
- int *new_probemap, new_probenum;
+ int *new_probemap, new_probenum, num_required_probes, num_probes, i;
char *probe_id;
- int i, num_required_probes;
srd_dbg("set probes called for instance %s with list of %d probes",
di->inst_id, g_hash_table_size(new_probes));
for (i = 0; i < di->dec_num_probes; i++)
new_probemap[i] = -1;
+ num_probes = 0;
for (l = g_hash_table_get_keys(new_probes); l; l = l->next) {
probe_id = l->data;
- probe_val= g_hash_table_lookup(new_probes, probe_id);
+ probe_val = g_hash_table_lookup(new_probes, probe_id);
if (!g_variant_is_of_type(probe_val, G_VARIANT_TYPE_INT32)) {
/* Probe name was specified without a value. */
srd_err("No probe number was specified for %s.",
new_probemap[p->order] = new_probenum;
srd_dbg("Setting probe mapping: %s (index %d) = probe %d.",
p->id, p->order, new_probenum);
+ num_probes++;
}
+ di->data_unitsize = (num_probes + 7) / 8;
srd_dbg("Final probe map:");
num_required_probes = g_slist_length(di->decoder->probes);
* @return Pointer to a newly allocated struct srd_decoder_inst, or
* NULL in case of failure.
*
- * @since 0.1.0 (the API changed in 0.3.0, though)
+ * @since 0.3.0
*/
SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess,
const char *decoder_id, GHashTable *options)
* order in which the decoder class defined them.
*/
di->dec_num_probes = g_slist_length(di->decoder->probes) +
- g_slist_length(di->decoder->opt_probes);
+ g_slist_length(di->decoder->opt_probes);
if (di->dec_num_probes) {
if (!(di->dec_probemap =
- g_try_malloc(sizeof(int) * di->dec_num_probes))) {
+ g_try_malloc(sizeof(int) * di->dec_num_probes))) {
srd_err("Failed to g_malloc() probe map.");
g_free(di);
return NULL;
for (i = 0; i < di->dec_num_probes; i++)
di->dec_probemap[i] = i;
}
+ di->data_unitsize = (di->dec_num_probes + 7) / 8;
/* Create a new instance of this decoder class. */
if (!(di->py_inst = PyObject_CallObject(dec->py_dec, NULL))) {
if (PyErr_Occurred())
srd_exception_catch("failed to create %s instance: ",
- decoder_id);
+ decoder_id);
g_free(di->dec_probemap);
g_free(di);
return NULL;
*
* @return SRD_OK upon success, a (negative) error code otherwise.
*
- * @since 0.1.0 (the API changed in 0.3.0, though)
+ * @since 0.3.0
*/
SRD_API int srd_inst_stack(struct srd_session *sess,
struct srd_decoder_inst *di_from, struct srd_decoder_inst *di_to)
*
* @return Pointer to struct srd_decoder_inst, or NULL if not found.
*
- * @since 0.1.0 (the API changed in 0.3.0, though)
+ * @since 0.3.0
*/
SRD_API struct srd_decoder_inst *srd_inst_find_by_id(struct srd_session *sess,
const char *inst_id)
}
/** @private */
-SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di, PyObject *args)
+SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di)
{
- PyObject *py_name, *py_res;
+ PyObject *py_res;
GSList *l;
struct srd_decoder_inst *next_di;
+ int ret;
srd_dbg("Calling start() method on protocol decoder instance %s.",
- di->inst_id);
+ di->inst_id);
- if (!(py_name = PyUnicode_FromString("start"))) {
- srd_err("Unable to build Python object for 'start'.");
+ if (!(py_res = PyObject_CallMethod(di->py_inst, "start", NULL))) {
srd_exception_catch("Protocol decoder instance %s: ",
- di->inst_id);
+ di->inst_id);
return SRD_ERR_PYTHON;
}
-
- if (!(py_res = PyObject_CallMethodObjArgs(di->py_inst,
- py_name, args, NULL))) {
- srd_exception_catch("Protocol decoder instance %s: ",
- di->inst_id);
- return SRD_ERR_PYTHON;
- }
-
Py_DecRef(py_res);
- Py_DecRef(py_name);
- /*
- * Start all the PDs stacked on top of this one. Pass along the
- * metadata all the way from the bottom PD, even though it's only
- * applicable to logic data for now.
- */
+ /* Start all the PDs stacked on top of this one. */
for (l = di->next_di; l; l = l->next) {
next_di = l->data;
- srd_inst_start(next_di, args);
+ if ((ret = srd_inst_start(next_di)) != SRD_OK)
+ return ret;
}
return SRD_OK;
/**
* Run the specified decoder function.
*
+ * @param di The decoder instance to call. Must not be NULL.
* @param start_samplenum The starting sample number for the buffer's sample
* set, relative to the start of capture.
- * @param di The decoder instance to call. Must not be NULL.
+ * @param end_samplenum The ending sample number for the buffer's sample
+ * set, relative to the start of capture.
* @param inbuf The buffer to decode. Must not be NULL.
* @param inbuflen Length of the buffer. Must be > 0.
*
*
* @since 0.1.0
*/
-SRD_PRIV int srd_inst_decode(uint64_t start_samplenum,
- const struct srd_decoder_inst *di, const uint8_t *inbuf,
- uint64_t inbuflen)
+SRD_PRIV int srd_inst_decode(const struct srd_decoder_inst *di,
+ uint64_t start_samplenum, uint64_t end_samplenum,
+ const uint8_t *inbuf, uint64_t inbuflen)
{
PyObject *py_res;
srd_logic *logic;
- uint64_t end_samplenum;
srd_dbg("Calling decode() on instance %s with %" PRIu64 " bytes "
"starting at sample %" PRIu64 ".", di->inst_id, inbuflen,
Py_INCREF(logic->sample);
Py_IncRef(di->py_inst);
- end_samplenum = start_samplenum + inbuflen / di->data_unitsize;
if (!(py_res = PyObject_CallMethod(di->py_inst, "decode",
- "KKO", logic->start_samplenum,
- end_samplenum, logic))) {
- srd_exception_catch("Protocol decoder instance %s: ",
- di->inst_id);
+ "KKO", start_samplenum, end_samplenum, logic))) {
+ srd_exception_catch("Protocol decoder instance %s: ", di->inst_id);
return SRD_ERR_PYTHON;
}
Py_DecRef(py_res);
/** @} */
-/**
- * @defgroup grp_session Session handling
- *
- * Starting and handling decoding sessions.
- *
- * @{
- */
-
-static int session_is_valid(struct srd_session *sess)
-{
-
- if (!sess || sess->session_id < 1)
- return SRD_ERR;
-
- return SRD_OK;
-}
-
-/**
- * Create a decoding session.
- *
- * A session holds all decoder instances, their stack relationships and
- * output callbacks.
- *
- * @param sess A pointer which will hold a pointer to a newly
- * initialized session on return.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.3.0
- */
-SRD_API int srd_session_new(struct srd_session **sess)
-{
-
- if (!sess) {
- srd_err("Invalid session pointer.");
- return SRD_ERR_ARG;
- }
-
- if (!(*sess = g_try_malloc(sizeof(struct srd_session))))
- return SRD_ERR_MALLOC;
- (*sess)->session_id = ++max_session_id;
- (*sess)->num_probes = (*sess)->unitsize = (*sess)->samplerate = 0;
- (*sess)->di_list = (*sess)->callbacks = NULL;
-
- /* Keep a list of all sessions, so we can clean up as needed. */
- sessions = g_slist_append(sessions, *sess);
-
- srd_dbg("Created session %d.", (*sess)->session_id);
-
- return SRD_OK;
-}
-
-/**
- * Start a decoding session.
- *
- * Decoders, instances and stack must have been prepared beforehand,
- * and all SRD_CONF parameters set.
- *
- * @param sess The session to start.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.1.0 (the API changed in 0.3.0, though)
- */
-SRD_API int srd_session_start(struct srd_session *sess)
-{
- PyObject *args;
- GSList *d;
- struct srd_decoder_inst *di;
- int ret;
-
- if (session_is_valid(sess) != SRD_OK) {
- srd_err("Invalid session pointer.");
- return SRD_ERR;
- }
- if (sess->num_probes == 0) {
- srd_err("Session has invalid number of probes.");
- return SRD_ERR;
- }
- if (sess->unitsize == 0) {
- srd_err("Session has invalid unitsize.");
- return SRD_ERR;
- }
- if (sess->samplerate == 0) {
- srd_err("Session has invalid samplerate.");
- return SRD_ERR;
- }
-
- ret = SRD_OK;
-
- srd_dbg("Calling start() on all instances in session %d with "
- "%" PRIu64 " probes, unitsize %" PRIu64
- ", samplerate %" PRIu64 ".", sess->session_id,
- sess->num_probes, sess->unitsize, sess->samplerate);
-
- /*
- * Currently only one item of metadata is passed along to decoders,
- * samplerate. This can be extended as needed.
- */
- if (!(args = Py_BuildValue("{s:l}", "samplerate", (long)sess->samplerate))) {
- srd_err("Unable to build Python object for metadata.");
- return SRD_ERR_PYTHON;
- }
-
- /* Run the start() method on all decoders receiving frontend data. */
- for (d = sess->di_list; d; d = d->next) {
- di = d->data;
- di->data_num_probes = sess->num_probes;
- di->data_unitsize = sess->unitsize;
- di->data_samplerate = sess->samplerate;
- if ((ret = srd_inst_start(di, args)) != SRD_OK)
- break;
- }
-
- Py_DecRef(args);
-
- return ret;
-}
-
-/**
- * Set a configuration key in a session.
- *
- * @param sess The session to configure.
- * @param key The configuration key (SRD_CONF_*).
- * @param data The new value for the key, as a GVariant with GVariantType
- * appropriate to that key. A floating reference can be passed
- * in; its refcount will be sunk and unreferenced after use.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.3.0
- */
-SRD_API int srd_session_config_set(struct srd_session *sess, int key,
- GVariant *data)
-{
-
- if (session_is_valid(sess) != SRD_OK) {
- srd_err("Invalid session.");
- return SRD_ERR_ARG;
- }
-
- if (!data) {
- srd_err("Invalid config data.");
- return SRD_ERR_ARG;
- }
-
- if (!g_variant_is_of_type(data, G_VARIANT_TYPE_UINT64)) {
- srd_err("Value for key %d should be of type uint64.", key);
- return SRD_ERR_ARG;
- }
-
- switch (key) {
- case SRD_CONF_NUM_PROBES:
- sess->num_probes = g_variant_get_uint64(data);
- break;
- case SRD_CONF_UNITSIZE:
- sess->unitsize = g_variant_get_uint64(data);
- break;
- case SRD_CONF_SAMPLERATE:
- sess->samplerate = g_variant_get_uint64(data);
- break;
- default:
- srd_err("Cannot set config for unknown key %d.", key);
- return SRD_ERR_ARG;
- }
-
- g_variant_unref(data);
-
- return SRD_OK;
-}
-
-/**
- * Send a chunk of logic sample data to a running decoder session.
- *
- * @param sess The session to use.
- * @param start_samplenum The sample number of the first sample in this chunk.
- * @param inbuf Pointer to sample data.
- * @param inbuflen Length in bytes of the buffer.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.1.0
- */
-SRD_API int srd_session_send(struct srd_session *sess, uint64_t start_samplenum,
- const uint8_t *inbuf, uint64_t inbuflen)
-{
- GSList *d;
- int ret;
-
- if (session_is_valid(sess) != SRD_OK) {
- srd_err("Invalid session.");
- return SRD_ERR_ARG;
- }
-
- srd_dbg("Calling decode() on all instances with starting sample "
- "number %" PRIu64 ", %" PRIu64 " bytes at 0x%p",
- start_samplenum, inbuflen, inbuf);
-
- for (d = sess->di_list; d; d = d->next) {
- if ((ret = srd_inst_decode(start_samplenum, d->data, inbuf,
- inbuflen)) != SRD_OK)
- return ret;
- }
-
- return SRD_OK;
-}
-
-/**
- * Destroy a decoding session.
- *
- * All decoder instances and output callbacks are properly released.
- *
- * @param sess The session to be destroyed.
- *
- * @return SRD_OK upon success, a (negative) error code otherwise.
- *
- * @since 0.3.0
- */
-SRD_API int srd_session_destroy(struct srd_session *sess)
-{
- int session_id;
-
- if (!sess) {
- srd_err("Invalid session.");
- return SRD_ERR_ARG;
- }
-
- session_id = sess->session_id;
- if (sess->di_list)
- srd_inst_free_all(sess, NULL);
- if (sess->callbacks)
- g_slist_free_full(sess->callbacks, g_free);
- sessions = g_slist_remove(sessions, sess);
- g_free(sess);
-
- srd_dbg("Destroyed session %d.", session_id);
-
- return SRD_OK;
-}
-
-/**
- * Register/add a decoder output callback function.
- *
- * The function will be called when a protocol decoder sends output back
- * to the PD controller (except for Python objects, which only go up the
- * stack).
- *
- * @param sess The output session in which to register the callback.
- * @param output_type The output type this callback will receive. Only one
- * callback per output type can be registered.
- * @param cb The function to call. Must not be NULL.
- * @param cb_data Private data for the callback function. Can be NULL.
- *
- * @since 0.1.0 (the API changed in 0.3.0, though)
- */
-SRD_API int srd_pd_output_callback_add(struct srd_session *sess,
- int output_type, srd_pd_output_callback_t cb, void *cb_data)
-{
- struct srd_pd_callback *pd_cb;
-
- if (session_is_valid(sess) != SRD_OK) {
- srd_err("Invalid session.");
- return SRD_ERR_ARG;
- }
-
- srd_dbg("Registering new callback for output type %d.", output_type);
-
- if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback)))) {
- srd_err("Failed to g_malloc() struct srd_pd_callback.");
- return SRD_ERR_MALLOC;
- }
-
- pd_cb->output_type = output_type;
- pd_cb->cb = cb;
- pd_cb->cb_data = cb_data;
- sess->callbacks = g_slist_append(sess->callbacks, pd_cb);
-
- return SRD_OK;
-}
-
-/** @private */
-SRD_PRIV struct srd_pd_callback *srd_pd_output_callback_find(
- struct srd_session *sess, int output_type)
-{
- GSList *l;
- struct srd_pd_callback *tmp, *pd_cb;
-
- if (session_is_valid(sess) != SRD_OK) {
- srd_err("Invalid session.");
- return NULL;
- }
-
- pd_cb = NULL;
- for (l = sess->callbacks; l; l = l->next) {
- tmp = l->data;
- if (tmp->output_type == output_type) {
- pd_cb = tmp;
- break;
- }
- }
-
- return pd_cb;
-}
-
-/* This is the backend function to Python sigrokdecode.add() call. */
-/** @private */
-SRD_PRIV int srd_inst_pd_output_add(struct srd_decoder_inst *di,
- int output_type, const char *proto_id)
-{
- struct srd_pd_output *pdo;
-
- srd_dbg("Instance %s creating new output type %d for %s.",
- di->inst_id, output_type, proto_id);
-
- if (!(pdo = g_try_malloc(sizeof(struct srd_pd_output)))) {
- srd_err("Failed to g_malloc() struct srd_pd_output.");
- return -1;
- }
-
- /* pdo_id is just a simple index, nothing is deleted from this list anyway. */
- pdo->pdo_id = g_slist_length(di->pd_output);
- pdo->output_type = output_type;
- pdo->di = di;
- pdo->proto_id = g_strdup(proto_id);
- di->pd_output = g_slist_append(di->pd_output, pdo);
-
- return pdo->pdo_id;
-}
-
-/** @} */
projects / libsigrokdecode.git / blobdiff