#include <stdlib.h>
+/* List of decoder instances. */
static GSList *di_list = NULL;
+
+/* List of frontend callbacks to receive PD output. */
static GSList *callbacks = NULL;
/* lives in decoder.c */
{
int ret;
+ srd_dbg("Initializing libsigrokdecode.");
+
+ /* Add our own module to the list of built-in modules. */
PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
- /* Py_Initialize() returns void and usually cannot fail. */
+ /* Initialize the python interpreter. */
Py_Initialize();
if ((ret = set_modulepath()) != SRD_OK) {
*/
int srd_exit(void)
{
- /* Unload/free all decoders, and then the list of decoders itself. */
- /* TODO: Error handling. */
+
+ srd_dbg("Exiting libsigrokdecode.");
+
srd_unload_all_decoders();
g_slist_free(pd_list);
/**
- * Add search directories for the protocol decoders.
+ * 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.
*
* TODO: add path from env var SIGROKDECODE_PATH, config etc
* TODO: Should take directoryname/path as input.
+ *
+ * @return TODO.
*/
int set_modulepath(void)
{
path = g_strdup(DECODERS_DIR);
#endif
- /* TODO: Prepend instead of appending. */
/* TODO: Sanity check on 'path' (length, escape special chars, ...). */
- s = g_strdup_printf("import sys; sys.path.append(r'%s')", path);
+ s = g_strdup_printf("import sys; sys.path.insert(0, r'%s')", path);
ret = PyRun_SimpleString(s);
if (!(py_optval = PyLong_FromString(value, NULL, 0))) {
/* ValueError Exception */
PyErr_Clear();
- srd_err("Option %s has invalid value %s: expected integer",
+ srd_err("Option %s has invalid value %s: expected integer.",
key, value);
goto err_out;
}
if (val_ull == (unsigned long long)-1) {
/* OverFlowError exception */
PyErr_Clear();
- srd_err("Invalid integer value for %s: expected integer", key);
+ srd_err("Invalid integer value for %s: expected integer.", key);
goto err_out;
}
if (!(py_optval = PyLong_FromUnsignedLongLong(val_ull)))
Py_XDECREF(py_di_options);
Py_XDECREF(py_dec_optkeys);
Py_XDECREF(py_dec_options);
- if (key)
- g_free(key);
- if (PyErr_Occurred()) {
- srd_dbg("stray exception!");
- PyErr_Print();
- PyErr_Clear();
- }
+ g_free(key);
+ if (PyErr_Occurred())
+ catch_exception("Stray exception in srd_instance_set_options().");
return ret;
}
+/* Helper GComparefunc for g_slist_find_custom() in srd_instance_set_probes() */
static gint compare_probe_id(struct srd_probe *a, char *probe_id)
{
GSList *sl;
struct srd_probe *p;
int *new_probemap, new_probenum;
- char *probe_id;
+ char *probe_id, *probenum_str;
+
+ srd_dbg("set probes called for instance %s with list of %d probes",
+ di->instance_id, g_hash_table_size(new_probes));
if (g_hash_table_size(new_probes) == 0)
/* No probes provided. */
for (l = g_hash_table_get_keys(new_probes); l; l = l->next) {
probe_id = l->data;
- new_probenum = strtol(g_hash_table_lookup(new_probes, probe_id), NULL, 10);
+ probenum_str = g_hash_table_lookup(new_probes, probe_id);
+ if (!probenum_str) {
+ /* Probe name was specified without a value. */
+ srd_err("No probe number was specified for %s.", probe_id);
+ g_free(new_probemap);
+ return SRD_ERR_ARG;
+ }
+ new_probenum = strtol(probenum_str, NULL, 10);
if (!(sl = g_slist_find_custom(di->decoder->probes, probe_id,
(GCompareFunc)compare_probe_id))) {
/* Fall back on optional probes. */
if (!(sl = g_slist_find_custom(di->decoder->extra_probes,
probe_id, (GCompareFunc)compare_probe_id))) {
- srd_err("Protocol decoder %s has no probe '%s'",
+ srd_err("Protocol decoder %s has no probe '%s'.",
di->decoder->name, probe_id);
g_free(new_probemap);
return SRD_ERR_ARG;
}
p = sl->data;
new_probemap[p->order] = new_probenum;
+ srd_dbg("setting probe mapping for %d = probe %d", p->order, new_probenum);
}
g_free(di->dec_probemap);
di->dec_probemap = new_probemap;
int i;
char *instance_id;
- srd_dbg("%s: creating new %s instance", __func__, decoder_id);
+ srd_dbg("Creating new %s instance.", decoder_id);
if (!(dec = srd_get_decoder_by_id(decoder_id))) {
srd_err("Protocol decoder %s not found.", decoder_id);
/* Create a new instance of this decoder class. */
if (!(di->py_instance = PyObject_CallObject(dec->py_dec, NULL))) {
if (PyErr_Occurred())
- PyErr_Print();
+ catch_exception("failed to create %s instance: ", decoder_id);
g_free(di->dec_probemap);
g_free(di);
return NULL;
{
if (!di_from || !di_to) {
- srd_err("invalid from/to instance pair");
+ srd_err("Invalid from/to instance pair.");
return SRD_ERR_ARG;
}
- if (!g_slist_find(di_list, di_from)) {
- srd_err("unstacked instance not found");
- return SRD_ERR_ARG;
+ if (g_slist_find(di_list, di_to)) {
+ /* Remove from the unstacked list. */
+ di_list = g_slist_remove(di_list, di_to);
}
- /* Remove from the unstacked list. */
- di_list = g_slist_remove(di_list, di_to);
-
/* Stack on top of source di. */
di_from->next_di = g_slist_append(di_from->next_di, di_to);
return SRD_OK;
}
-
-/* TODO: this should go into the PD stack */
-struct srd_decoder_instance *srd_instance_find(char *instance_id)
+/**
+ * Finds a decoder instance by its instance id, but only in the bottom
+ * level of instances -- instances already stacked on top of another one
+ * will not be found.
+ *
+ * @param instance_id The instance id to be found.
+ *
+ * @return Pointer to struct srd_decoder_instance, or NULL if not found.
+ */
+struct srd_decoder_instance *srd_instance_find_by_id(char *instance_id)
{
GSList *l;
struct srd_decoder_instance *tmp, *di;
return di;
}
+/**
+ * Finds a decoder instance by its python object, i.e. that instance's
+ * instantiation of the sigrokdecode.Decoder class. This will recurse
+ * to find the instance anywhere in the stack tree.
+ *
+ * @param stack Pointer to a GSList of struct srd_decoder_instance,
+ * indicating the stack to search. To start searching at the bottom
+ * level of decoder instances, pass NULL.
+ * @param obj The python class instantiation.
+ *
+ * @return Pointer to struct srd_decoder_instance, or NULL if not found.
+ */
+struct srd_decoder_instance *srd_instance_find_by_obj(GSList *stack,
+ PyObject *obj)
+{
+ GSList *l;
+ struct srd_decoder_instance *tmp, *di;
+
+ di = NULL;
+ for (l = stack ? stack : di_list; di == NULL && l != NULL; l = l->next) {
+ tmp = l->data;
+ if (tmp->py_instance == obj)
+ di = tmp;
+ else if (tmp->next_di)
+ di = srd_instance_find_by_obj(tmp->next_di, obj);
+ }
+
+ return di;
+}
+
int srd_instance_start(struct srd_decoder_instance *di, PyObject *args)
{
PyObject *py_name, *py_res;
+ GSList *l;
+ struct srd_decoder_instance *next_di;
- srd_dbg("calling start() method on protocol decoder instance %s", di->instance_id);
+ srd_dbg("Calling start() method on protocol decoder instance %s.",
+ di->instance_id);
if (!(py_name = PyUnicode_FromString("start"))) {
- srd_err("unable to build python object for 'start'");
- if (PyErr_Occurred())
- PyErr_Print();
+ srd_err("Unable to build python object for 'start'.");
+ catch_exception("Protocol decoder instance %s: ", di->instance_id);
return SRD_ERR_PYTHON;
}
if (!(py_res = PyObject_CallMethodObjArgs(di->py_instance,
py_name, args, NULL))) {
- if (PyErr_Occurred())
- PyErr_Print();
+ catch_exception("Protocol decoder instance %s: ", di->instance_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.
+ */
+ for (l = di->next_di; l; l = l->next) {
+ next_di = l->data;
+ srd_instance_start(next_di, args);
+ }
+
return SRD_OK;
}
/**
* Run the specified decoder function.
*
- * @param dec TODO
- * @param inbuf TODO
- * @param inbuflen TODO
+ * @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 inbuf The buffer to decode. Must not be NULL.
+ * @param inbuflen Length of the buffer. Must be > 0.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
*/
int srd_instance_decode(uint64_t start_samplenum,
- struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen)
+ struct srd_decoder_instance *di, uint8_t *inbuf, uint64_t inbuflen)
{
- PyObject *py_instance, *py_res;
+ PyObject *py_res;
srd_logic *logic;
uint64_t end_samplenum;
- /* Return an error upon unusable input. */
- if (di == NULL)
- return SRD_ERR_ARG; /* TODO: More specific error? */
- if (inbuf == NULL)
- return SRD_ERR_ARG; /* TODO: More specific error? */
- if (inbuflen == 0) /* No point in working on empty buffers. */
- return SRD_ERR_ARG; /* TODO: More specific error? */
+ srd_dbg("Calling decode() on instance %s with %d bytes starting "
+ "at sample %d.", di->instance_id, inbuflen, start_samplenum);
- /* TODO: Error handling. */
- py_instance = di->py_instance;
- Py_XINCREF(py_instance);
+ /* Return an error upon unusable input. */
+ if (!di) {
+ srd_dbg("empty decoder instance");
+ return SRD_ERR_ARG;
+ }
+ if (!inbuf) {
+ srd_dbg("NULL buffer pointer");
+ return SRD_ERR_ARG;
+ }
+ if (inbuflen == 0) {
+ srd_dbg("empty buffer");
+ return SRD_ERR_ARG;
+ }
+ /* Create new srd_logic object. Each iteration around the PD's loop
+ * will fill one sample into this object.
+ */
logic = PyObject_New(srd_logic, &srd_logic_type);
Py_INCREF(logic);
logic->di = di;
logic->sample = PyList_New(2);
Py_INCREF(logic->sample);
+ Py_IncRef(di->py_instance);
end_samplenum = start_samplenum + inbuflen / di->data_unitsize;
- if (!(py_res = PyObject_CallMethod(py_instance, "decode",
+ if (!(py_res = PyObject_CallMethod(di->py_instance, "decode",
"KKO", logic->start_samplenum, end_samplenum, logic))) {
- if (PyErr_Occurred())
- PyErr_Print(); /* Returns void. */
-
+ catch_exception("Protocol decoder instance %s: ", di->instance_id);
return SRD_ERR_PYTHON; /* TODO: More specific error? */
}
-
- Py_XDECREF(py_res);
+ Py_DecRef(py_res);
return SRD_OK;
}
+void srd_instance_free(struct srd_decoder_instance *di)
+{
+ GSList *l;
+ struct srd_pd_output *pdo;
+
+ srd_dbg("Freeing instance %s", di->instance_id);
+
+ Py_DecRef(di->py_instance);
+ g_free(di->instance_id);
+ g_free(di->dec_probemap);
+ g_slist_free(di->next_di);
+ for (l = di->pd_output; l; l = l->next) {
+ pdo = l->data;
+ g_free(pdo->proto_id);
+ g_free(pdo);
+ }
+ g_slist_free(di->pd_output);
+
+}
+
+void srd_instance_free_all(GSList *stack)
+{
+ GSList *l;
+ struct srd_decoder_instance *di;
+
+ di = NULL;
+ for (l = stack ? stack : di_list; di == NULL && l != NULL; l = l->next) {
+ di = l->data;
+ if (di->next_di)
+ srd_instance_free_all(di->next_di);
+ srd_instance_free(di);
+ }
+ if (!stack) {
+ g_slist_free(di_list);
+ di_list = NULL;
+ }
+
+}
int srd_session_start(int num_probes, int unitsize, uint64_t samplerate)
{
PyObject *args;
- GSList *d, *s;
+ GSList *d;
struct srd_decoder_instance *di;
int ret;
+ srd_dbg("Calling start() on all instances with %d probes, "
+ "unitsize %d samplerate %d.", num_probes, unitsize, 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)samplerate))) {
- srd_err("unable to build python object for metadata");
+ srd_err("Unable to build python object for metadata.");
return SRD_ERR_PYTHON;
}
di->data_unitsize = unitsize;
di->data_samplerate = samplerate;
if ((ret = srd_instance_start(di, args) != SRD_OK))
- return ret;
-
- /* Run the start() method on all decoders up the stack from this one. */
- for (s = di->next_di; s; s = s->next) {
- /* These don't need probes, unitsize and samplerate. */
- di = s->data;
- if ((ret = srd_instance_start(di, args) != SRD_OK))
- return ret;
- }
+ break;
}
- Py_DECREF(args);
+ Py_DecRef(args);
- return SRD_OK;
+ return ret;
}
/* Feed logic samples to decoder session. */
GSList *d;
int ret;
+ srd_dbg("Calling decode() on all instances with starting sample "
+ "number %"PRIu64", %"PRIu64" bytes at 0x%p", start_samplenum,
+ inbuflen, inbuf);
+
for (d = di_list; d; d = d->next) {
if ((ret = srd_instance_decode(start_samplenum, d->data, inbuf,
inbuflen)) != SRD_OK)
}
-int pd_add(struct srd_decoder_instance *di, int output_type,
- char *proto_id)
-{
- struct srd_pd_output *pdo;
-
- if (!(pdo = g_try_malloc(sizeof(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->decoder = di->decoder;
- pdo->proto_id = g_strdup(proto_id);
- di->pd_output = g_slist_append(di->pd_output, pdo);
-
- return pdo->pdo_id;
-}
-
-struct srd_decoder_instance *get_di_by_decobject(void *decobject)
-{
- GSList *l, *s;
- struct srd_decoder_instance *di;
-
- for (l = di_list; l; l = l->next) {
- di = l->data;
- if (decobject == di->py_instance)
- return di;
- /* Check decoders stacked on top of this one. */
- for (s = di->next_di; s; s = s->next) {
- di = s->data;
- if (decobject == di->py_instance)
- return di;
- }
- }
-
- return NULL;
-}
-
int srd_register_callback(int output_type, void *cb)
{
struct srd_pd_callback *pd_cb;
+ srd_dbg("Registering new callback for output type %d.", output_type);
+
if (!(pd_cb = g_try_malloc(sizeof(struct srd_pd_callback))))
return SRD_ERR_MALLOC;
return cb;
}
+
+/* This is the backend function to python sigrokdecode.add() call. */
+int pd_add(struct srd_decoder_instance *di, int output_type, char *proto_id)
+{
+ struct srd_pd_output *pdo;
+
+ srd_dbg("Instance %s creating new output type %d for %s.",
+ di->instance_id, output_type, proto_id);
+
+ if (!(pdo = g_try_malloc(sizeof(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