X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=instance.c;h=b56a3e662400938839a89d99d8ce0bd8ebd0dfd1;hp=e72fc966104d843e68aa5579d76780f6799bec9b;hb=991c44f33a55733610f6d9da1efbcc5bf1074dee;hpb=84c1c0b52820af2418186ac3ecf93a5c6373a22e

diff --git a/instance.c b/instance.c
index e72fc96..b56a3e6 100644
--- a/instance.c
+++ b/instance.c
@@ -18,9 +18,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
-#include "libsigrokdecode-internal.h"
-#include "config.h"
+#include <config.h>
+#include "libsigrokdecode-internal.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
+#include "libsigrokdecode.h"
 #include <glib.h>
 #include <inttypes.h>
 #include <stdlib.h>
@@ -28,10 +28,10 @@
 
 /** @cond PRIVATE */
 
-extern GSList *sessions;
+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 */
 
@@ -64,11 +64,11 @@ extern SRD_PRIV PyTypeObject srd_logic_type;
 SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
 		GHashTable *options)
 {
-    struct srd_decoder_option *sdo;
+	struct srd_decoder_option *sdo;
 	PyObject *py_di_options, *py_optval;
 	GVariant *value;
-    GSList *l;
-    double val_double;
+	GSList *l;
+	double val_double;
 	gint64 val_int;
 	int ret;
 	const char *val_str;
@@ -96,7 +96,7 @@ SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
 	}
 
 	ret = SRD_ERR_PYTHON;
-    py_optval = NULL;
+	py_optval = NULL;
 
 	/*
 	 * The 'options' tuple is a class variable, but we need to
@@ -110,181 +110,168 @@ SRD_API int srd_inst_option_set(struct srd_decoder_inst *di,
 	py_di_options = PyDict_New();
 	PyObject_SetAttrString(di->py_inst, "options", py_di_options);
 
-    for (l = di->decoder->options; l; l = l->next) {
-        sdo = l->data;
-        if ((value = g_hash_table_lookup(options, sdo->id))) {
-            /* A value was supplied for this option. */
-            if (!g_variant_type_equal(g_variant_get_type(value),
-                    g_variant_get_type(sdo->def))) {
-                srd_err("Option '%s' should have the same type "
-                        "as the default value.", sdo->id);
-                goto err_out;
-            }
-        } else {
-            /* Use default for this option. */
-            value = sdo->def;
-        }
-        if (g_variant_is_of_type(value, G_VARIANT_TYPE_STRING)) {
-            val_str = g_variant_get_string(value, NULL);
-            if (!(py_optval = PyUnicode_FromString(val_str))) {
-                /* Some UTF-8 encoding error. */
-                PyErr_Clear();
-                srd_err("Option '%s' requires a UTF-8 string value.", sdo->id);
-                goto err_out;
-            }
-        } else if (g_variant_is_of_type(value, G_VARIANT_TYPE_INT64)) {
-            val_int = g_variant_get_int64(value);
-            if (!(py_optval = PyLong_FromLong(val_int))) {
-                /* ValueError Exception */
-                PyErr_Clear();
-                srd_err("Option '%s' has invalid integer value.", sdo->id);
-                goto err_out;
-            }
-        } else if (g_variant_is_of_type(value, G_VARIANT_TYPE_DOUBLE)) {
-            val_double = g_variant_get_int64(value);
-            if (!(py_optval = PyFloat_FromDouble(val_double))) {
-                /* ValueError Exception */
-                PyErr_Clear();
-                srd_err("Option '%s' has invalid float value.", sdo->id);
-                goto err_out;
-            }
-        }
+	for (l = di->decoder->options; l; l = l->next) {
+		sdo = l->data;
+		if ((value = g_hash_table_lookup(options, sdo->id))) {
+			/* A value was supplied for this option. */
+			if (!g_variant_type_equal(g_variant_get_type(value),
+				  g_variant_get_type(sdo->def))) {
+				srd_err("Option '%s' should have the same type "
+					"as the default value.", sdo->id);
+				goto err_out;
+			}
+		} else {
+			/* Use default for this option. */
+			value = sdo->def;
+		}
+		if (g_variant_is_of_type(value, G_VARIANT_TYPE_STRING)) {
+			val_str = g_variant_get_string(value, NULL);
+			if (!(py_optval = PyUnicode_FromString(val_str))) {
+				/* Some UTF-8 encoding error. */
+				PyErr_Clear();
+				srd_err("Option '%s' requires a UTF-8 string value.", sdo->id);
+				goto err_out;
+			}
+		} else if (g_variant_is_of_type(value, G_VARIANT_TYPE_INT64)) {
+			val_int = g_variant_get_int64(value);
+			if (!(py_optval = PyLong_FromLong(val_int))) {
+				/* ValueError Exception */
+				PyErr_Clear();
+				srd_err("Option '%s' has invalid integer value.", sdo->id);
+				goto err_out;
+			}
+		} else if (g_variant_is_of_type(value, G_VARIANT_TYPE_DOUBLE)) {
+			val_double = g_variant_get_double(value);
+			if (!(py_optval = PyFloat_FromDouble(val_double))) {
+				/* ValueError Exception */
+				PyErr_Clear();
+				srd_err("Option '%s' has invalid float value.",
+					sdo->id);
+				goto err_out;
+			}
+		}
 		if (PyDict_SetItemString(py_di_options, sdo->id, py_optval) == -1)
 			goto err_out;
-        /* Not harmful even if we used the default. */
-        g_hash_table_remove(options, sdo->id);
-    }
-    if (g_hash_table_size(options) != 0)
-        srd_warn("Unknown options specified for '%s'", di->inst_id);
+		/* Not harmful even if we used the default. */
+		g_hash_table_remove(options, sdo->id);
+	}
+	if (g_hash_table_size(options) != 0)
+		srd_warn("Unknown options specified for '%s'", di->inst_id);
 
 	ret = SRD_OK;
 
 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;
 	}
 
 	return ret;
 }
 
-/* Helper GComparefunc for g_slist_find_custom() in srd_inst_probe_set_all() */
-static gint compare_probe_id(const struct srd_probe *a, const char *probe_id)
+/* Helper GComparefunc for g_slist_find_custom() in srd_inst_channel_set_all() */
+static gint compare_channel_id(const struct srd_channel *pdch,
+			const char *channel_id)
 {
-	return strcmp(a->id, probe_id);
+	return strcmp(pdch->id, channel_id);
 }
 
 /**
- * Set all probes in a decoder instance.
+ * Set all channels in a decoder instance.
  *
- * This function sets _all_ probes for the specified decoder instance, i.e.,
- * it overwrites any probes that were already defined (if any).
+ * This function sets _all_ channels for the specified decoder instance, i.e.,
+ * it overwrites any channels that were already defined (if any).
  *
  * @param di Decoder instance.
- * @param new_probes A GHashTable of probes to set. Key is probe name, value is
- *                   the probe number. Samples passed to this instance will be
- *                   arranged in this order.
- * @param unit_size Number of bytes per sample in the data stream to be passed
- *                  to the decoder. The highest probe index specified in the
- *                  probe map must lie within a sample unit.
+ * @param new_channels A GHashTable of channels to set. Key is channel name,
+ *                     value is the channel number. Samples passed to this
+ *                     instance will be arranged in this order.
  *
  * @return SRD_OK upon success, a (negative) error code otherwise.
  *
- * @since 0.1.0
+ * @since 0.4.0
  */
-SRD_API int srd_inst_probe_set_all(struct srd_decoder_inst *di,
-		GHashTable *new_probes, int unit_size)
+SRD_API int srd_inst_channel_set_all(struct srd_decoder_inst *di,
+		GHashTable *new_channels)
 {
-	GVariant *probe_val;
+	GVariant *channel_val;
 	GList *l;
 	GSList *sl;
-	struct srd_probe *p;
-	int *new_probemap, new_probenum, num_required_probes, i;
-	char *probe_id;
+	struct srd_channel *pdch;
+	int *new_channelmap, new_channelnum, num_required_channels, i;
+	char *channel_id;
 
-	srd_dbg("set probes called for instance %s with list of %d probes",
-		di->inst_id, g_hash_table_size(new_probes));
+	srd_dbg("Setting channels for instance %s with list of %d channels.",
+		di->inst_id, g_hash_table_size(new_channels));
 
-	if (g_hash_table_size(new_probes) == 0)
-		/* No probes provided. */
+	if (g_hash_table_size(new_channels) == 0)
+		/* No channels provided. */
 		return SRD_OK;
 
-	if (di->dec_num_probes == 0) {
-		/* Decoder has no probes. */
-		srd_err("Protocol decoder %s has no probes to define.",
+	if (di->dec_num_channels == 0) {
+		/* Decoder has no channels. */
+		srd_err("Protocol decoder %s has no channels to define.",
 			di->decoder->name);
 		return SRD_ERR_ARG;
 	}
 
-	new_probemap = NULL;
-
-	if (!(new_probemap = g_try_malloc(sizeof(int) * di->dec_num_probes))) {
-		srd_err("Failed to g_malloc() new probe map.");
-		return SRD_ERR_MALLOC;
-	}
+	new_channelmap = g_malloc(sizeof(int) * di->dec_num_channels);
 
 	/*
-	 * For now, map all indexes to probe -1 (can be overridden later).
-	 * This -1 is interpreted as an unspecified probe later.
+	 * For now, map all indexes to channel -1 (can be overridden later).
+	 * This -1 is interpreted as an unspecified channel later.
 	 */
-	for (i = 0; i < di->dec_num_probes; i++)
-		new_probemap[i] = -1;
-
-	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);
-		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.",
-					probe_id);
-			g_free(new_probemap);
+	for (i = 0; i < di->dec_num_channels; i++)
+		new_channelmap[i] = -1;
+
+	for (l = g_hash_table_get_keys(new_channels); l; l = l->next) {
+		channel_id = l->data;
+		channel_val = g_hash_table_lookup(new_channels, channel_id);
+		if (!g_variant_is_of_type(channel_val, G_VARIANT_TYPE_INT32)) {
+			/* Channel name was specified without a value. */
+			srd_err("No channel number was specified for %s.",
+					channel_id);
+			g_free(new_channelmap);
 			return SRD_ERR_ARG;
 		}
-		new_probenum = g_variant_get_int32(probe_val);
-		if (new_probenum >= 8 * unit_size) {
-			srd_err("Probe index %d not within data unit (%d bit).",
-				new_probenum, 8 * unit_size);
-			g_free(new_probemap);
-			return SRD_ERR_ARG;
-		}
-		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->opt_probes,
-			     probe_id, (GCompareFunc) compare_probe_id))) {
-				srd_err("Protocol decoder %s has no probe "
-						"'%s'.", di->decoder->name, probe_id);
-				g_free(new_probemap);
+		new_channelnum = g_variant_get_int32(channel_val);
+		if (!(sl = g_slist_find_custom(di->decoder->channels, channel_id,
+				(GCompareFunc)compare_channel_id))) {
+			/* Fall back on optional channels. */
+			if (!(sl = g_slist_find_custom(di->decoder->opt_channels,
+			     channel_id, (GCompareFunc)compare_channel_id))) {
+				srd_err("Protocol decoder %s has no channel "
+					"'%s'.", di->decoder->name, channel_id);
+				g_free(new_channelmap);
 				return SRD_ERR_ARG;
 			}
 		}
-		p = sl->data;
-		new_probemap[p->order] = new_probenum;
-		srd_dbg("Setting probe mapping: %s (index %d) = probe %d.",
-			p->id, p->order, new_probenum);
+		pdch = sl->data;
+		new_channelmap[pdch->order] = new_channelnum;
+		srd_dbg("Setting channel mapping: %s (index %d) = channel %d.",
+			pdch->id, pdch->order, new_channelnum);
 	}
-	di->data_unitsize = unit_size;
 
-	srd_dbg("Final probe map:");
-	num_required_probes = g_slist_length(di->decoder->probes);
-	for (i = 0; i < di->dec_num_probes; i++) {
-		srd_dbg(" - index %d = probe %d (%s)", i, new_probemap[i],
-		        (i < num_required_probes) ? "required" : "optional");
+	srd_dbg("Final channel map:");
+	num_required_channels = g_slist_length(di->decoder->channels);
+	for (i = 0; i < di->dec_num_channels; i++) {
+		srd_dbg(" - index %d = channel %d (%s)", i, new_channelmap[i],
+			(i < num_required_channels) ? "required" : "optional");
 	}
 
-	/* Report an error if not all required probes were specified. */
-	for (i = 0; i < num_required_probes; i++) {
-		if (new_probemap[i] != -1)
+	/* Report an error if not all required channels were specified. */
+	for (i = 0; i < num_required_channels; i++) {
+		if (new_channelmap[i] != -1)
 			continue;
-		p = g_slist_nth(di->decoder->probes, i)->data;
-		srd_err("Required probe '%s' (index %d) was not specified.",
-			p->id, i);
+		pdch = g_slist_nth(di->decoder->channels, i)->data;
+		srd_err("Required channel '%s' (index %d) was not specified.",
+			pdch->id, i);
 		return SRD_ERR;
 	}
 
-	g_free(di->dec_probemap);
-	di->dec_probemap = new_probemap;
+	g_free(di->dec_channelmap);
+	di->dec_channelmap = new_channelmap;
 
 	return SRD_OK;
 }
@@ -322,10 +309,7 @@ SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess,
 		return NULL;
 	}
 
-	if (!(di = g_try_malloc0(sizeof(struct srd_decoder_inst)))) {
-		srd_err("Failed to g_malloc() instance.");
-		return NULL;
-	}
+	di = g_malloc0(sizeof(struct srd_decoder_inst));
 
 	di->decoder = dec;
 	di->sess = sess;
@@ -337,49 +321,51 @@ SRD_API struct srd_decoder_inst *srd_inst_new(struct srd_session *sess,
 		di->inst_id = g_strdup(decoder_id);
 
 	/*
-	 * Prepare a default probe map, where samples come in the
+	 * Prepare a default channel map, where samples come in the
 	 * 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);
-	if (di->dec_num_probes) {
-		if (!(di->dec_probemap =
-				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;
+	di->dec_num_channels = g_slist_length(di->decoder->channels) +
+			g_slist_length(di->decoder->opt_channels);
+	if (di->dec_num_channels) {
+		di->dec_channelmap =
+				g_malloc(sizeof(int) * di->dec_num_channels);
+		for (i = 0; i < di->dec_num_channels; i++)
+			di->dec_channelmap[i] = i;
 		/*
 		 * Will be used to prepare a sample at every iteration
 		 * of the instance's decode() method.
 		 */
-		if (!(di->probe_samples = g_try_malloc(di->dec_num_probes))) {
-			srd_err("Failed to g_malloc() sample buffer.");
-			g_free(di->dec_probemap);
-			g_free(di);
-			return NULL;
-		}
+		di->channel_samples = g_malloc(di->dec_num_channels);
 	}
 
 	/* 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_probemap);
+		g_free(di->dec_channelmap);
 		g_free(di);
 		return NULL;
 	}
 
 	if (options && srd_inst_option_set(di, options) != SRD_OK) {
-		g_free(di->dec_probemap);
+		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);
 
@@ -420,7 +406,7 @@ SRD_API int srd_inst_stack(struct srd_session *sess,
 	/* Stack on top of source di. */
 	di_bottom->next_di = g_slist_append(di_bottom->next_di, di_top);
 
-	srd_dbg("Stacked %s on top of %s.", di_top->inst_id, di_bottom->inst_id);
+	srd_dbg("Stacked %s onto %s.", di_top->inst_id, di_bottom->inst_id);
 
 	return SRD_OK;
 }
@@ -519,6 +505,56 @@ SRD_PRIV struct srd_decoder_inst *srd_inst_find_by_obj(const GSList *stack,
 	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)
 {
@@ -530,13 +566,23 @@ 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;
@@ -548,7 +594,305 @@ SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di)
 }
 
 /**
- * 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
@@ -557,23 +901,19 @@ SRD_PRIV int srd_inst_start(struct srd_decoder_inst *di)
  * 			  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. Must be > 0.
  *
  * @return SRD_OK upon success, a (negative) error code otherwise.
  *
  * @private
- *
- * @since 0.1.0
  */
-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)
+		const uint8_t *inbuf, uint64_t inbuflen, uint64_t unitsize)
 {
 	PyObject *py_res;
 	srd_logic *logic;
-
-	srd_dbg("Calling decode() on instance %s with %" PRIu64 " bytes "
-		"starting at sample %" PRIu64 ".", di->inst_id, inbuflen,
-		start_samplenum);
+	long apiver;
 
 	/* Return an error upon unusable input. */
 	if (!di) {
@@ -588,28 +928,69 @@ SRD_PRIV int srd_inst_decode(const struct srd_decoder_inst *di,
 		srd_dbg("empty buffer");
 		return SRD_ERR_ARG;
 	}
+	if (unitsize == 0) {
+		srd_dbg("unitsize 0");
+		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 = (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);
+	di->data_unitsize = unitsize;
 
-	Py_IncRef(di->py_inst);
-	if (!(py_res = PyObject_CallMethod(di->py_inst, "decode",
+	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);
+
+	apiver = srd_decoder_apiver(di->decoder);
+
+	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;
 }
@@ -624,7 +1005,8 @@ SRD_PRIV void srd_inst_free(struct srd_decoder_inst *di)
 
 	Py_DecRef(di->py_inst);
 	g_free(di->inst_id);
-	g_free(di->dec_probemap);
+	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;
@@ -660,4 +1042,3 @@ SRD_PRIV void srd_inst_free_all(struct srd_session *sess, GSList *stack)
 }
 
 /** @} */
-