extern SRD_PRIV GSList *sessions;
-/* type_logic.c */
-extern SRD_PRIV PyTypeObject srd_logic_type;
+/* module_sigrokdecode.c */
+extern SRD_PRIV PyObject *srd_logic_type;
/** @endcond */
err_out:
Py_XDECREF(py_optval);
if (PyErr_Occurred()) {
- srd_exception_catch("Stray exception in srd_inst_option_set().");
+ srd_exception_catch("Stray exception in srd_inst_option_set()");
ret = SRD_ERR_PYTHON;
}
/* 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: ",
+ srd_exception_catch("Failed to create %s instance",
decoder_id);
g_free(di->dec_channelmap);
g_free(di);
return NULL;
}
+ di->condition_list = NULL;
+ di->match_array = NULL;
+ di->start_samplenum = 0;
+ di->end_samplenum = 0;
+ di->inbuf = NULL;
+ di->inbuflen = 0;
+ di->cur_samplenum = 0;
+ di->old_pins_array = NULL;
+ di->thread_handle = NULL;
+ di->got_new_samples = FALSE;
+ di->handled_all_samples = FALSE;
+
/* Instance takes input from a frontend by default. */
sess->di_list = g_slist_append(sess->di_list, di);
return di;
}
+/**
+ * Set the list of initial (assumed) pin values.
+ *
+ * If the list already exists, do nothing.
+ *
+ * @param di Decoder instance to use. Must not be NULL.
+ *
+ * @private
+ */
+static void set_initial_pin_values(struct srd_decoder_inst *di)
+{
+ int i;
+ GString *s;
+ PyObject *py_initial_pins;
+
+ if (!di || !di->py_inst) {
+ srd_err("Invalid decoder instance.");
+ return;
+ }
+
+ /* Nothing to do if di->old_pins_array is already != NULL. */
+ if (di->old_pins_array) {
+ srd_dbg("Initial pins already set, nothing to do.");
+ return;
+ }
+
+ /* Create an array of old (previous sample) pins, init to 0. */
+ di->old_pins_array = g_array_sized_new(FALSE, TRUE, sizeof(uint8_t), di->dec_num_channels);
+ g_array_set_size(di->old_pins_array, di->dec_num_channels);
+
+ /* Check if the decoder has set self.initial_pins. */
+ if (!PyObject_HasAttrString(di->py_inst, "initial_pins")) {
+ srd_dbg("Initial pins: all 0 (self.initial_pins not set).");
+ return;
+ }
+
+ /* Get self.initial_pins. */
+ py_initial_pins = PyObject_GetAttrString(di->py_inst, "initial_pins");
+
+ /* Fill di->old_pins_array based on self.initial_pins. */
+ s = g_string_sized_new(100);
+ for (i = 0; i < di->dec_num_channels; i++) {
+ di->old_pins_array->data[i] = PyLong_AsLong(PyList_GetItem(py_initial_pins, i));
+ g_string_append_printf(s, "%d, ", di->old_pins_array->data[i]);
+ }
+ s = g_string_truncate(s, s->len - 2);
+ srd_dbg("Initial pins: %s.", s->str);
+ g_string_free(s, TRUE);
+}
+
/** @private */
SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di)
{
srd_dbg("Calling start() method on protocol decoder instance %s.",
di->inst_id);
+ /* Run self.start(). */
if (!(py_res = PyObject_CallMethod(di->py_inst, "start", NULL))) {
- srd_exception_catch("Protocol decoder instance %s: ",
+ srd_exception_catch("Protocol decoder instance %s",
di->inst_id);
return SRD_ERR_PYTHON;
}
Py_DecRef(py_res);
+ /* Set the initial pins based on self.initial_pins. */
+ set_initial_pin_values(di);
+
+ /* Set self.samplenum to 0. */
+ PyObject_SetAttrString(di->py_inst, "samplenum", PyLong_FromLong(0));
+
+ /* Set self.matches to None. */
+ PyObject_SetAttrString(di->py_inst, "matches", Py_None);
+
/* Start all the PDs stacked on top of this one. */
for (l = di->next_di; l; l = l->next) {
next_di = l->data;
}
/**
- * Run the specified decoder function.
+ * Check whether the specified sample matches the specified term.
+ *
+ * In the case of SRD_TERM_SKIP, this function can modify
+ * term->num_samples_already_skipped.
+ *
+ * @param old_sample The value of the previous sample (0/1).
+ * @param sample The value of the current sample (0/1).
+ * @param term The term that should be checked for a match. Must not be NULL.
+ *
+ * @retval TRUE The current sample matches the specified term.
+ * @retval FALSE The current sample doesn't match the specified term, or an
+ * invalid term was provided.
+ *
+ * @private
+ */
+static gboolean sample_matches(uint8_t old_sample, uint8_t sample, struct srd_term *term)
+{
+ if (!term)
+ return FALSE;
+
+ switch (term->type) {
+ case SRD_TERM_HIGH:
+ if (sample == 1)
+ return TRUE;
+ break;
+ case SRD_TERM_LOW:
+ if (sample == 0)
+ return TRUE;
+ break;
+ case SRD_TERM_RISING_EDGE:
+ if (old_sample == 0 && sample == 1)
+ return TRUE;
+ break;
+ case SRD_TERM_FALLING_EDGE:
+ if (old_sample == 1 && sample == 0)
+ return TRUE;
+ break;
+ case SRD_TERM_EITHER_EDGE:
+ if ((old_sample == 1 && sample == 0) || (old_sample == 0 && sample == 1))
+ return TRUE;
+ break;
+ case SRD_TERM_NO_EDGE:
+ if ((old_sample == 0 && sample == 0) || (old_sample == 1 && sample == 1))
+ return TRUE;
+ break;
+ case SRD_TERM_SKIP:
+ if (term->num_samples_already_skipped == term->num_samples_to_skip)
+ return TRUE;
+ term->num_samples_already_skipped++;
+ break;
+ default:
+ srd_err("Unknown term type %d.", term->type);
+ break;
+ }
+
+ return FALSE;
+}
+
+SRD_PRIV void match_array_free(struct srd_decoder_inst *di)
+{
+ if (!di || !di->match_array)
+ return;
+
+ g_array_free(di->match_array, TRUE);
+ di->match_array = NULL;
+}
+
+SRD_PRIV void condition_list_free(struct srd_decoder_inst *di)
+{
+ GSList *l, *ll;
+
+ if (!di)
+ return;
+
+ for (l = di->condition_list; l; l = l->next) {
+ ll = l->data;
+ if (ll)
+ g_slist_free_full(ll, g_free);
+ }
+
+ di->condition_list = NULL;
+}
+
+static gboolean have_non_null_conds(const struct srd_decoder_inst *di)
+{
+ GSList *l, *cond;
+
+ if (!di)
+ return FALSE;
+
+ for (l = di->condition_list; l; l = l->next) {
+ cond = l->data;
+ if (cond)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void update_old_pins_array(struct srd_decoder_inst *di,
+ const uint8_t *sample_pos)
+{
+ uint8_t sample;
+ int i, byte_offset, bit_offset;
+
+ if (!di || !di->dec_channelmap || !sample_pos)
+ return;
+
+ for (i = 0; i < di->dec_num_channels; i++) {
+ byte_offset = di->dec_channelmap[i] / 8;
+ bit_offset = di->dec_channelmap[i] % 8;
+ sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;
+ di->old_pins_array->data[i] = sample;
+ }
+}
+
+static gboolean term_matches(const struct srd_decoder_inst *di,
+ struct srd_term *term, const uint8_t *sample_pos)
+{
+ uint8_t old_sample, sample;
+ int byte_offset, bit_offset, ch;
+
+ if (!di || !di->dec_channelmap || !term || !sample_pos)
+ return FALSE;
+
+ /* Overwritten below (or ignored for SRD_TERM_SKIP). */
+ old_sample = sample = 0;
+
+ if (term->type != SRD_TERM_SKIP) {
+ ch = term->channel;
+ byte_offset = di->dec_channelmap[ch] / 8;
+ bit_offset = di->dec_channelmap[ch] % 8;
+ sample = *(sample_pos + byte_offset) & (1 << bit_offset) ? 1 : 0;
+ old_sample = di->old_pins_array->data[ch];
+ }
+
+ return sample_matches(old_sample, sample, term);
+}
+
+static gboolean all_terms_match(const struct srd_decoder_inst *di,
+ const GSList *cond, const uint8_t *sample_pos)
+{
+ const GSList *l;
+ struct srd_term *term;
+
+ if (!di || !cond || !sample_pos)
+ return FALSE;
+
+ for (l = cond; l; l = l->next) {
+ term = l->data;
+ if (!term_matches(di, term, sample_pos))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static gboolean at_least_one_condition_matched(
+ const struct srd_decoder_inst *di, unsigned int num_conditions)
+{
+ unsigned int i;
+
+ if (!di)
+ return FALSE;
+
+ for (i = 0; i < num_conditions; i++) {
+ if (di->match_array->data[i])
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gboolean find_match(struct srd_decoder_inst *di)
+{
+ static uint64_t s = 0;
+ uint64_t i, j, num_samples_to_process;
+ GSList *l, *cond;
+ const uint8_t *sample_pos;
+ unsigned int num_conditions;
+
+ /* Check whether the condition list is NULL/empty. */
+ if (!di->condition_list) {
+ srd_dbg("NULL/empty condition list, automatic match.");
+ return TRUE;
+ }
+
+ /* Check whether we have any non-NULL conditions. */
+ if (!have_non_null_conds(di)) {
+ srd_dbg("Only NULL conditions in list, automatic match.");
+ return TRUE;
+ }
+
+ num_samples_to_process = di->end_samplenum - di->cur_samplenum;
+ num_conditions = g_slist_length(di->condition_list);
+
+ /* di->match_array is NULL here. Create a new GArray. */
+ di->match_array = g_array_sized_new(FALSE, TRUE, sizeof(gboolean), num_conditions);
+ g_array_set_size(di->match_array, num_conditions);
+
+ for (i = 0, s = 0; i < num_samples_to_process; i++, s++, (di->cur_samplenum)++) {
+
+ sample_pos = di->inbuf + ((di->cur_samplenum - di->start_samplenum) * di->data_unitsize);
+
+ /* Check whether the current sample matches at least one of the conditions (logical OR). */
+ /* IMPORTANT: We need to check all conditions, even if there was a match already! */
+ for (l = di->condition_list, j = 0; l; l = l->next, j++) {
+ cond = l->data;
+ if (!cond)
+ continue;
+ /* All terms in 'cond' must match (logical AND). */
+ di->match_array->data[j] = all_terms_match(di, cond, sample_pos);
+ }
+
+ update_old_pins_array(di, sample_pos);
+
+ /* If at least one condition matched we're done. */
+ if (at_least_one_condition_matched(di, num_conditions))
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ * Process available samples and check if they match the defined conditions.
+ *
+ * This function returns if there is an error, or when a match is found, or
+ * when all samples have been processed (whether a match was found or not).
+ *
+ * @param di The decoder instance to use. Must not be NULL.
+ * @param found_match Will be set to TRUE if at least one condition matched,
+ * FALSE otherwise. Must not be NULL.
+ *
+ * @retval SRD_OK No errors occured, see found_match for the result.
+ * @retval SRD_ERR_ARG Invalid arguments.
+ *
+ * @private
+ */
+SRD_PRIV int process_samples_until_condition_match(struct srd_decoder_inst *di, gboolean *found_match)
+{
+ if (!di || !found_match)
+ return SRD_ERR_ARG;
+
+ /* Check if any of the current condition(s) match. */
+ while (TRUE) {
+ /* Feed the (next chunk of the) buffer to find_match(). */
+ *found_match = find_match(di);
+
+ /* Did we handle all samples yet? */
+ if (di->cur_samplenum >= di->end_samplenum) {
+ srd_dbg("Done, handled all samples (%" PRIu64 "/%" PRIu64 ").",
+ di->cur_samplenum, di->end_samplenum);
+ return SRD_OK;
+ }
+
+ /* If we didn't find a match, continue looking. */
+ if (!(*found_match))
+ continue;
+
+ /* At least one condition matched, return. */
+ return SRD_OK;
+ }
+
+ return SRD_OK;
+}
+
+/**
+ * Worker thread (per PD-stack).
+ *
+ * @param data Pointer to the lowest-level PD's device instance.
+ * Must not be NULL.
+ *
+ * @return NULL if there was an error.
+ */
+static gpointer di_thread(gpointer data)
+{
+ PyObject *py_res;
+ struct srd_decoder_inst *di;
+
+ if (!data)
+ return NULL;
+
+ di = data;
+
+ /* Call self.decode(). Only returns if the PD throws an exception. */
+ Py_IncRef(di->py_inst);
+ if (!(py_res = PyObject_CallMethod(di->py_inst, "decode", NULL))) {
+ srd_exception_catch("Protocol decoder instance %s: ", di->inst_id);
+ exit(1); /* TODO: Proper shutdown. This is a hack. */
+ return NULL;
+ }
+ Py_DecRef(py_res);
+
+ return NULL;
+}
+
+/**
+ * Decode a chunk of samples.
*
* @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 inbuf The buffer to decode. Must not be NULL.
* @param inbuflen Length of the buffer. Must be > 0.
- * @param unitsize The number of bytes per sample.
+ * @param unitsize The number of bytes per sample. Must be > 0.
*
* @return SRD_OK upon success, a (negative) error code otherwise.
*
* @private
- *
- * @since 0.4.0
*/
-SRD_PRIV int srd_inst_decode(const struct srd_decoder_inst *di,
+SRD_PRIV int srd_inst_decode(struct srd_decoder_inst *di,
uint64_t start_samplenum, uint64_t end_samplenum,
const uint8_t *inbuf, uint64_t inbuflen, uint64_t unitsize)
{
PyObject *py_res;
srd_logic *logic;
+ long apiver;
/* Return an error upon unusable input. */
if (!di) {
srd_dbg("empty buffer");
return SRD_ERR_ARG;
}
+ if (unitsize == 0) {
+ srd_dbg("unitsize 0");
+ return SRD_ERR_ARG;
+ }
- ((struct srd_decoder_inst *)di)->data_unitsize = unitsize;
+ di->data_unitsize = unitsize;
- srd_dbg("Calling decode(), start sample %" PRIu64 ", end sample %"
+ srd_dbg("Decoding: start sample %" PRIu64 ", end sample %"
PRIu64 " (%" PRIu64 " samples, %" PRIu64 " bytes, unitsize = "
"%d), instance %s.", start_samplenum, end_samplenum,
end_samplenum - start_samplenum, inbuflen, di->data_unitsize,
di->inst_id);
- /*
- * 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 = (struct srd_decoder_inst *)di;
- logic->start_samplenum = start_samplenum;
- logic->itercnt = 0;
- logic->inbuf = (uint8_t *)inbuf;
- logic->inbuflen = inbuflen;
- logic->sample = PyList_New(2);
- Py_INCREF(logic->sample);
+ apiver = srd_decoder_apiver(di->decoder);
- Py_IncRef(di->py_inst);
- if (!(py_res = PyObject_CallMethod(di->py_inst, "decode",
+ if (apiver == 2) {
+ /*
+ * Create new srd_logic object. Each iteration around the PD's
+ * loop will fill one sample into this object.
+ */
+ logic = PyObject_New(srd_logic, (PyTypeObject *)srd_logic_type);
+ Py_INCREF(logic);
+ logic->di = (struct srd_decoder_inst *)di;
+ logic->start_samplenum = start_samplenum;
+ logic->itercnt = 0;
+ logic->inbuf = (uint8_t *)inbuf;
+ logic->inbuflen = inbuflen;
+ logic->sample = PyList_New(2);
+ Py_INCREF(logic->sample);
+
+ Py_IncRef(di->py_inst);
+ if (!(py_res = PyObject_CallMethod(di->py_inst, "decode",
"KKO", start_samplenum, end_samplenum, logic))) {
- srd_exception_catch("Protocol decoder instance %s: ",
- di->inst_id);
- return SRD_ERR_PYTHON;
+ srd_exception_catch("Protocol decoder instance %s",
+ di->inst_id);
+ return SRD_ERR_PYTHON;
+ }
+ Py_DecRef(py_res);
+ } else {
+ /* If this is the first call, start the worker thread. */
+ if (!di->thread_handle)
+ di->thread_handle = g_thread_new("di_thread",
+ di_thread, di);
+
+ /* Push the new sample chunk to the worker thread. */
+ g_mutex_lock(&di->data_mutex);
+ di->start_samplenum = start_samplenum;
+ di->end_samplenum = end_samplenum;
+ di->inbuf = inbuf;
+ di->inbuflen = inbuflen;
+ di->got_new_samples = TRUE;
+ di->handled_all_samples = FALSE;
+
+ /* Signal the thread that we have new data. */
+ g_cond_signal(&di->got_new_samples_cond);
+ g_mutex_unlock(&di->data_mutex);
+
+ /* When all samples in this chunk were handled, return. */
+ g_mutex_lock(&di->data_mutex);
+ while (!di->handled_all_samples)
+ g_cond_wait(&di->handled_all_samples_cond, &di->data_mutex);
+ g_mutex_unlock(&di->data_mutex);
}
- Py_DecRef(py_res);
return SRD_OK;
}
Py_DecRef(di->py_inst);
g_free(di->inst_id);
g_free(di->dec_channelmap);
+ g_free(di->channel_samples);
g_slist_free(di->next_di);
for (l = di->pd_output; l; l = l->next) {
pdo = l->data;
projects / libsigrokdecode.git / blobdiff