X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=type_decoder.c;h=dda0de28a2aab2fd9c6a991604eabeb031d49ed2;hp=7abdac18502744ffb8176fffdf2cecad52ce6bcf;hb=991c44f33a55733610f6d9da1efbcc5bf1074dee;hpb=4916b17368e8ed06f4bfd045052ab0f891c33954
diff --git a/type_decoder.c b/type_decoder.c
index 7abdac1..dda0de2 100644
--- a/type_decoder.c
+++ b/type_decoder.c
@@ -17,22 +17,28 @@
* along with this program. If not, see .
*/
+#include
#include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "libsigrokdecode.h"
-#include "config.h"
#include
typedef struct {
PyObject_HEAD
} srd_Decoder;
-/* This is only used for nicer srd_dbg() output. */
-static const char *OUTPUT_TYPES[] = {
- "OUTPUT_ANN",
- "OUTPUT_PYTHON",
- "OUTPUT_BINARY",
- "OUTPUT_META",
-};
+/* This is only used for nicer srd_dbg() output.
+ */
+static const char *output_type_name(unsigned int idx)
+{
+ static const char names[][16] = {
+ "OUTPUT_ANN",
+ "OUTPUT_PYTHON",
+ "OUTPUT_BINARY",
+ "OUTPUT_META",
+ "(invalid)"
+ };
+ return names[MIN(idx, G_N_ELEMENTS(names) - 1)];
+}
static int convert_annotation(struct srd_decoder_inst *di, PyObject *obj,
struct srd_proto_data *pdata)
@@ -44,9 +50,9 @@ static int convert_annotation(struct srd_decoder_inst *di, PyObject *obj,
char **ann_text;
/* Should be a list of [annotation class, [string, ...]]. */
- if (!PyList_Check(obj) && !PyTuple_Check(obj)) {
- srd_err("Protocol decoder %s submitted %s instead of list.",
- di->decoder->name, obj->ob_type->tp_name);
+ if (!PyList_Check(obj)) {
+ srd_err("Protocol decoder %s submitted an annotation that"
+ " is not a list", di->decoder->name);
return SRD_ERR_PYTHON;
}
@@ -105,26 +111,25 @@ static int convert_binary(struct srd_decoder_inst *di, PyObject *obj,
int bin_class;
char *class_name, *buf;
- /* Should be a tuple of (binary class, bytes). */
- if (!PyTuple_Check(obj)) {
- srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY with "
- "%s instead of tuple.", di->decoder->name,
- obj->ob_type->tp_name);
+ /* Should be a list of [binary class, bytes]. */
+ if (!PyList_Check(obj)) {
+ srd_err("Protocol decoder %s submitted non-list for SRD_OUTPUT_BINARY.",
+ di->decoder->name);
return SRD_ERR_PYTHON;
}
/* Should have 2 elements. */
- if (PyTuple_Size(obj) != 2) {
- srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY tuple "
+ if (PyList_Size(obj) != 2) {
+ srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list "
"with %zd elements instead of 2", di->decoder->name,
PyList_Size(obj));
return SRD_ERR_PYTHON;
}
/* The first element should be an integer. */
- py_tmp = PyTuple_GetItem(obj, 0);
+ py_tmp = PyList_GetItem(obj, 0);
if (!PyLong_Check(py_tmp)) {
- srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY tuple, "
+ srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, "
"but first element was not an integer.", di->decoder->name);
return SRD_ERR_PYTHON;
}
@@ -136,9 +141,9 @@ static int convert_binary(struct srd_decoder_inst *di, PyObject *obj,
}
/* Second element should be bytes. */
- py_tmp = PyTuple_GetItem(obj, 1);
+ py_tmp = PyList_GetItem(obj, 1);
if (!PyBytes_Check(py_tmp)) {
- srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY tuple, "
+ srd_err("Protocol decoder %s submitted SRD_OUTPUT_BINARY list, "
"but second element was not bytes.", di->decoder->name);
return SRD_ERR_PYTHON;
}
@@ -171,7 +176,7 @@ static int convert_meta(struct srd_proto_data *pdata, PyObject *obj)
if (pdata->pdo->meta_type == G_VARIANT_TYPE_INT64) {
if (!PyLong_Check(obj)) {
PyErr_Format(PyExc_TypeError, "This output was registered "
- "as 'int', but '%s' was passed.", obj->ob_type->tp_name);
+ "as 'int', but something else was passed.");
return SRD_ERR_PYTHON;
}
intvalue = PyLong_AsLongLong(obj);
@@ -181,7 +186,7 @@ static int convert_meta(struct srd_proto_data *pdata, PyObject *obj)
} else if (pdata->pdo->meta_type == G_VARIANT_TYPE_DOUBLE) {
if (!PyFloat_Check(obj)) {
PyErr_Format(PyExc_TypeError, "This output was registered "
- "as 'float', but '%s' was passed.", obj->ob_type->tp_name);
+ "as 'float', but something else was passed.");
return SRD_ERR_PYTHON;
}
dvalue = PyFloat_AsDouble(obj);
@@ -229,7 +234,7 @@ static PyObject *Decoder_put(PyObject *self, PyObject *args)
srd_spew("Instance %s put %" PRIu64 "-%" PRIu64 " %s on oid %d.",
di->inst_id, start_sample, end_sample,
- OUTPUT_TYPES[pdo->output_type], output_id);
+ output_type_name(pdo->output_type), output_id);
pdata = g_malloc0(sizeof(struct srd_proto_data));
pdata->start_sample = start_sample;
@@ -256,7 +261,7 @@ static PyObject *Decoder_put(PyObject *self, PyObject *args)
if (!(py_res = PyObject_CallMethod(
next_di->py_inst, "decode", "KKO", start_sample,
end_sample, py_data))) {
- srd_exception_catch("Calling %s decode(): ",
+ srd_exception_catch("Calling %s decode() failed",
next_di->inst_id);
}
Py_XDECREF(py_res);
@@ -336,8 +341,7 @@ static PyObject *Decoder_register(PyObject *self, PyObject *args,
else if (meta_type_py == &PyFloat_Type)
meta_type_gv = G_VARIANT_TYPE_DOUBLE;
else {
- PyErr_Format(PyExc_TypeError, "Unsupported type '%s'.",
- meta_type_py->tp_name);
+ PyErr_Format(PyExc_TypeError, "Unsupported type.");
return NULL;
}
}
@@ -365,21 +369,368 @@ static PyObject *Decoder_register(PyObject *self, PyObject *args,
return py_new_output_id;
}
+static int get_term_type(const char *v)
+{
+ switch (v[0]) {
+ case 'h':
+ return SRD_TERM_HIGH;
+ case 'l':
+ return SRD_TERM_LOW;
+ case 'r':
+ return SRD_TERM_RISING_EDGE;
+ case 'f':
+ return SRD_TERM_FALLING_EDGE;
+ case 'e':
+ return SRD_TERM_EITHER_EDGE;
+ case 'n':
+ return SRD_TERM_NO_EDGE;
+ }
+
+ return -1;
+}
+
+/**
+ * Get the pin values at the current sample number.
+ *
+ * @param di The decoder instance to use. Must not be NULL.
+ * The number of channels must be >= 1.
+ *
+ * @return A newly allocated PyTuple containing the pin values at the
+ * current sample number.
+ */
+static PyObject *get_current_pinvalues(const struct srd_decoder_inst *di)
+{
+ int i;
+ uint8_t sample;
+ const uint8_t *sample_pos;
+ int byte_offset, bit_offset;
+ PyObject *py_pinvalues;
+
+ if (!di) {
+ srd_err("Invalid decoder instance.");
+ return NULL;
+ }
+
+ py_pinvalues = PyTuple_New(di->dec_num_channels);
+
+ for (i = 0; i < di->dec_num_channels; i++) {
+ /* A channelmap value of -1 means "unused optional channel". */
+ if (di->dec_channelmap[i] == -1) {
+ /* Value of unused channel is 0xff, instead of 0 or 1. */
+ PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(0xff));
+ } else {
+ sample_pos = di->inbuf + ((di->cur_samplenum - di->start_samplenum) * di->data_unitsize);
+ byte_offset = di->dec_channelmap[i] / 8;
+ bit_offset = di->dec_channelmap[i] % 8;
+ sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;
+ PyTuple_SetItem(py_pinvalues, i, PyLong_FromLong(sample));
+ }
+ }
+
+ Py_IncRef(py_pinvalues);
+
+ return py_pinvalues;
+}
+
+/**
+ * Create a list of terms in the specified condition.
+ *
+ * If there are no terms in the condition, 'term_list' will be NULL.
+ *
+ * @param py_dict A Python dict containing terms. Must not be NULL.
+ * @param term_list Pointer to a GSList which will be set to the newly
+ * created list of terms. Must not be NULL.
+ *
+ * @return SRD_OK upon success, a negative error code otherwise.
+ */
+static int create_term_list(PyObject *py_dict, GSList **term_list)
+{
+ Py_ssize_t pos = 0;
+ PyObject *py_key, *py_value;
+ struct srd_term *term;
+ uint64_t num_samples_to_skip;
+ char *term_str;
+
+ if (!py_dict || !term_list)
+ return SRD_ERR_ARG;
+
+ /* "Create" an empty GSList of terms. */
+ *term_list = NULL;
+
+ /* Iterate over all items in the current dict. */
+ while (PyDict_Next(py_dict, &pos, &py_key, &py_value)) {
+ /* Check whether the current key is a string or a number. */
+ if (PyLong_Check(py_key)) {
+ /* The key is a number. */
+ /* TODO: Check if the number is a valid channel. */
+ /* Get the value string. */
+ if ((py_pydictitem_as_str(py_dict, py_key, &term_str)) != SRD_OK) {
+ srd_err("Failed to get the value.");
+ return SRD_ERR;
+ }
+ term = g_malloc0(sizeof(struct srd_term));
+ term->type = get_term_type(term_str);
+ term->channel = PyLong_AsLong(py_key);
+ g_free(term_str);
+ } else if (PyUnicode_Check(py_key)) {
+ /* The key is a string. */
+ /* TODO: Check if it's "skip". */
+ if ((py_pydictitem_as_long(py_dict, py_key, &num_samples_to_skip)) != SRD_OK) {
+ srd_err("Failed to get number of samples to skip.");
+ return SRD_ERR;
+ }
+ term = g_malloc0(sizeof(struct srd_term));
+ term->type = SRD_TERM_SKIP;
+ term->num_samples_to_skip = num_samples_to_skip;
+ term->num_samples_already_skipped = 0;
+ } else {
+ srd_err("Term key is neither a string nor a number.");
+ return SRD_ERR;
+ }
+
+ /* Add the term to the list of terms. */
+ *term_list = g_slist_append(*term_list, term);
+ }
+
+ return SRD_OK;
+}
+
+/**
+ * Replace the current condition list with the new one.
+ *
+ * @param self TODO. Must not be NULL.
+ * @param args TODO. Must not be NULL.
+ *
+ * @retval SRD_OK The new condition list was set successfully.
+ * @retval SRD_ERR There was an error setting the new condition list.
+ * The contents of di->condition_list are undefined.
+ * @retval 9999 TODO.
+ */
+static int set_new_condition_list(PyObject *self, PyObject *args)
+{
+ struct srd_decoder_inst *di;
+ GSList *term_list;
+ PyObject *py_conditionlist, *py_conds, *py_dict;
+ int i, num_conditions, ret;
+
+ if (!self || !args)
+ return SRD_ERR_ARG;
+
+ /* Get the decoder instance. */
+ if (!(di = srd_inst_find_by_obj(NULL, self))) {
+ PyErr_SetString(PyExc_Exception, "decoder instance not found");
+ return SRD_ERR;
+ }
+
+ /* Parse the argument of self.wait() into 'py_conds'. */
+ if (!PyArg_ParseTuple(args, "O", &py_conds)) {
+ /* Let Python raise this exception. */
+ return SRD_ERR;
+ }
+
+ /* Check whether 'py_conds' is a dict or a list. */
+ if (PyList_Check(py_conds)) {
+ /* 'py_conds' is a list. */
+ py_conditionlist = py_conds;
+ num_conditions = PyList_Size(py_conditionlist);
+ if (num_conditions == 0)
+ return 9999; /* The PD invoked self.wait([]). */
+ } else if (PyDict_Check(py_conds)) {
+ /* 'py_conds' is a dict. */
+ if (PyDict_Size(py_conds) == 0)
+ return 9999; /* The PD invoked self.wait({}). */
+ /* Make a list and put the dict in there for convenience. */
+ py_conditionlist = PyList_New(1);
+ PyList_SetItem(py_conditionlist, 0, py_conds);
+ num_conditions = 1;
+ } else {
+ srd_err("Condition list is neither a list nor a dict.");
+ return SRD_ERR;
+ }
+
+ /* Free the old condition list. */
+ condition_list_free(di);
+
+ ret = SRD_OK;
+
+ /* Iterate over the conditions, set di->condition_list accordingly. */
+ for (i = 0; i < num_conditions; i++) {
+ /* Get a condition (dict) from the condition list. */
+ py_dict = PyList_GetItem(py_conditionlist, i);
+ if (!PyDict_Check(py_dict)) {
+ srd_err("Condition is not a dict.");
+ ret = SRD_ERR;
+ break;
+ }
+
+ /* Create the list of terms in this condition. */
+ if ((ret = create_term_list(py_dict, &term_list)) < 0)
+ break;
+
+ /* Add the new condition to the PD instance's condition list. */
+ di->condition_list = g_slist_append(di->condition_list, term_list);
+ }
+
+ Py_DecRef(py_conditionlist);
+
+ return ret;
+}
+
+static PyObject *Decoder_wait(PyObject *self, PyObject *args)
+{
+ int ret;
+ unsigned int i;
+ gboolean found_match;
+ struct srd_decoder_inst *di;
+ PyObject *py_pinvalues, *py_matched;
+
+ if (!self || !args)
+ return NULL;
+
+ if (!(di = srd_inst_find_by_obj(NULL, self))) {
+ PyErr_SetString(PyExc_Exception, "decoder instance not found");
+ Py_RETURN_NONE;
+ }
+
+ ret = set_new_condition_list(self, args);
+
+ if (ret == 9999) {
+ /* Empty condition list, automatic match. */
+ PyObject_SetAttrString(di->py_inst, "matched", Py_None);
+ /* Leave self.samplenum unchanged (== di->cur_samplenum). */
+ return get_current_pinvalues(di);
+ }
+
+ while (1) {
+ /* Wait for new samples to process. */
+ g_mutex_lock(&di->data_mutex);
+ while (!di->got_new_samples)
+ g_cond_wait(&di->got_new_samples_cond, &di->data_mutex);
+
+ /* Check whether any of the current condition(s) match. */
+ ret = process_samples_until_condition_match(di, &found_match);
+
+ /* If there's a match, set self.samplenum etc. and return. */
+ if (found_match) {
+ /* Set self.samplenum to the (absolute) sample number that matched. */
+ PyObject_SetAttrString(di->py_inst, "samplenum",
+ PyLong_FromLong(di->cur_samplenum));
+
+ if (di->match_array && di->match_array->len > 0) {
+ py_matched = PyTuple_New(di->match_array->len);
+ for (i = 0; i < di->match_array->len; i++)
+ PyTuple_SetItem(py_matched, i, PyBool_FromLong(di->match_array->data[i]));
+ PyObject_SetAttrString(di->py_inst, "matched", py_matched);
+ match_array_free(di);
+ } else {
+ PyObject_SetAttrString(di->py_inst, "matched", Py_None);
+ }
+
+ py_pinvalues = get_current_pinvalues(di);
+
+ g_mutex_unlock(&di->data_mutex);
+
+ return py_pinvalues;
+ }
+
+ /* No match, reset state for the next chunk. */
+ di->got_new_samples = FALSE;
+ di->handled_all_samples = TRUE;
+ di->start_samplenum = 0;
+ di->end_samplenum = 0;
+ di->inbuf = NULL;
+ di->inbuflen = 0;
+
+ /* Signal the main thread that we handled all samples. */
+ g_cond_signal(&di->handled_all_samples_cond);
+
+ g_mutex_unlock(&di->data_mutex);
+ }
+
+ Py_RETURN_NONE;
+}
+
+/**
+ * Return whether the specified channel was supplied to the decoder.
+ *
+ * @param self TODO. Must not be NULL.
+ * @param args TODO. Must not be NULL.
+ *
+ * @retval Py_True The channel has been supplied by the frontend.
+ * @retval Py_False The channel has been supplied by the frontend.
+ * @retval NULL An error occurred.
+ */
+static PyObject *Decoder_has_channel(PyObject *self, PyObject *args)
+{
+ int idx, max_idx;
+ struct srd_decoder_inst *di;
+ PyObject *py_channel;
+
+ if (!self || !args)
+ return NULL;
+
+ if (!(di = srd_inst_find_by_obj(NULL, self))) {
+ PyErr_SetString(PyExc_Exception, "decoder instance not found");
+ return NULL;
+ }
+
+ /* Parse the argument of self.has_channel() into 'py_channel'. */
+ if (!PyArg_ParseTuple(args, "O", &py_channel)) {
+ /* Let Python raise this exception. */
+ return NULL;
+ }
+
+ if (!PyLong_Check(py_channel)) {
+ PyErr_SetString(PyExc_Exception, "channel index not a number");
+ return NULL;
+ }
+
+ idx = PyLong_AsLong(py_channel);
+ max_idx = g_slist_length(di->decoder->channels)
+ + g_slist_length(di->decoder->opt_channels) - 1;
+
+ if (idx < 0 || idx > max_idx) {
+ srd_err("Invalid channel index %d/%d.", idx, max_idx);
+ PyErr_SetString(PyExc_Exception, "invalid channel");
+ return NULL;
+ }
+
+ return (di->dec_channelmap[idx] == -1) ? Py_False : Py_True;
+}
+
static PyMethodDef Decoder_methods[] = {
{"put", Decoder_put, METH_VARARGS,
"Accepts a dictionary with the following keys: startsample, endsample, data"},
{"register", (PyCFunction)Decoder_register, METH_VARARGS|METH_KEYWORDS,
"Register a new output stream"},
+ {"wait", Decoder_wait, METH_VARARGS,
+ "Wait for one or more conditions to occur"},
+ {"has_channel", Decoder_has_channel, METH_VARARGS,
+ "Report whether a channel was supplied"},
{NULL, NULL, 0, NULL}
};
-/** @cond PRIVATE */
-SRD_PRIV PyTypeObject srd_Decoder_type = {
- PyVarObject_HEAD_INIT(NULL, 0)
- .tp_name = "sigrokdecode.Decoder",
- .tp_basicsize = sizeof(srd_Decoder),
- .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
- .tp_doc = "sigrok Decoder base class",
- .tp_methods = Decoder_methods,
-};
-/** @endcond */
+/**
+ * Create the sigrokdecode.Decoder type.
+ *
+ * @return The new type object.
+ *
+ * @private
+ */
+SRD_PRIV PyObject *srd_Decoder_type_new(void)
+{
+ PyType_Spec spec;
+ PyType_Slot slots[] = {
+ { Py_tp_doc, "sigrok Decoder base class" },
+ { Py_tp_methods, Decoder_methods },
+ { Py_tp_new, (void *)&PyType_GenericNew },
+ { 0, NULL }
+ };
+ spec.name = "sigrokdecode.Decoder";
+ spec.basicsize = sizeof(srd_Decoder);
+ spec.itemsize = 0;
+ spec.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
+ spec.slots = slots;
+
+ return PyType_FromSpec(&spec);
+}