move sigrokdecode.Decoder type to its own source file

1 files changed, 194 insertions, 0 deletions

diff --git a/type_decoder.c b/type_decoder.c
new file mode 100644
index 0000000..34b414e
--- /dev/null
+++ b/type_decoder.c
@@ -0,0 +1,194 @@
+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "sigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
+#include "sigrokdecode-internal.h"
+#include "config.h"
+
+
+static int convert_pyobj(struct srd_decoder_instance *di, PyObject *obj,
+		int *ann_format, char ***ann)
+{
+	PyObject *py_tmp;
+	struct srd_pd_output *pdo;
+	int ann_id;
+
+	/* Should be a list of [annotation format, [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);
+		return SRD_ERR_PYTHON;
+	}
+
+	/* Should have 2 elements... */
+	if (PyList_Size(obj) != 2) {
+		srd_err("Protocol decoder %s submitted annotation list with %d elements instead of 2",
+				di->decoder->name, PyList_Size(obj));
+		return SRD_ERR_PYTHON;
+	}
+
+	/* First element should be an integer matching a previously
+	 * registered annotation format. */
+	py_tmp = PyList_GetItem(obj, 0);
+	if (!PyLong_Check(py_tmp)) {
+		srd_err("Protocol decoder %s submitted annotation list, but first element was not an integer",
+				di->decoder->name);
+		return SRD_ERR_PYTHON;
+	}
+
+	ann_id = PyLong_AsLong(py_tmp);
+	if (!(pdo = g_slist_nth_data(di->decoder->annotations, ann_id))) {
+		srd_err("Protocol decoder %s submitted data to non-existent annotation format %d",
+				di->decoder->name, ann_id);
+		return SRD_ERR_PYTHON;
+	}
+	*ann_format = ann_id;
+
+	/* Second element must be a list */
+	py_tmp = PyList_GetItem(obj, 1);
+	if (!PyList_Check(py_tmp)) {
+		srd_err("Protocol decoder %s submitted annotation list, but second element was not a list",
+				di->decoder->name);
+		return SRD_ERR_PYTHON;
+	}
+	if (py_strlist_to_char(py_tmp, ann) != SRD_OK) {
+		srd_err("Protocol decoder %s submitted annotation list, but second element was malformed",
+				di->decoder->name);
+		return SRD_ERR_PYTHON;
+	}
+
+	return SRD_OK;
+}
+
+static PyObject *Decoder_put(PyObject *self, PyObject *args)
+{
+	GSList *l;
+	PyObject *data, *py_res;
+	struct srd_decoder_instance *di, *next_di;
+	struct srd_pd_output *pdo;
+	struct srd_proto_data *pdata;
+	uint64_t start_sample, end_sample;
+	int output_id;
+	void (*cb)();
+
+	if (!(di = get_di_by_decobject(self)))
+		return NULL;
+
+	if (!PyArg_ParseTuple(args, "KKiO", &start_sample, &end_sample, &output_id, &data))
+		return NULL;
+
+	if (!(l = g_slist_nth(di->pd_output, output_id))) {
+		srd_err("Protocol decoder %s submitted invalid output ID %d",
+				di->decoder->name, output_id);
+		return NULL;
+	}
+	pdo = l->data;
+
+	if (!(pdata = g_try_malloc0(sizeof(struct srd_proto_data))))
+		return NULL;
+	pdata->start_sample = start_sample;
+	pdata->end_sample = end_sample;
+	pdata->pdo = pdo;
+
+	switch (pdo->output_type) {
+	case SRD_OUTPUT_ANN:
+		/* Annotations are only fed to callbacks. */
+		if ((cb = srd_find_callback(pdo->output_type))) {
+			/* Annotations need converting from PyObject. */
+			if (convert_pyobj(di, data, &pdata->ann_format,
+					(char ***)&pdata->data) != SRD_OK) {
+				/* An error was already logged. */
+				break;
+			}
+			cb(pdata);
+		}
+		break;
+	case SRD_OUTPUT_PROTO:
+		for (l = di->next_di; l; l = l->next) {
+			next_di = l->data;
+			/* TODO: is this needed? */
+			Py_XINCREF(next_di->py_instance);
+			if (!(py_res = PyObject_CallMethod(next_di->py_instance, "decode",
+					"KKO", start_sample, end_sample, data))) {
+				if (PyErr_Occurred())
+					PyErr_Print();
+			}
+			Py_XDECREF(py_res);
+		}
+		break;
+	case SRD_OUTPUT_BINARY:
+		srd_err("SRD_OUTPUT_BINARY not yet supported");
+		break;
+	default:
+		srd_err("Protocol decoder %s submitted invalid output type %d",
+				di->decoder->name, pdo->output_type);
+		break;
+	}
+
+	g_free(pdata);
+
+	Py_RETURN_NONE;
+}
+
+
+static PyObject *Decoder_add(PyObject *self, PyObject *args)
+{
+	PyObject *ret;
+	struct srd_decoder_instance *di;
+	char *proto_id;
+	int output_type, pdo_id;
+
+	if (!(di = get_di_by_decobject(self))) {
+		srd_err("%s():%d decoder instance not found", __func__, __LINE__);
+		PyErr_SetString(PyExc_Exception, "decoder instance not found");
+		return NULL;
+	}
+
+	if (!PyArg_ParseTuple(args, "is", &output_type, &proto_id)) {
+		if (PyErr_Occurred())
+			PyErr_Print();
+		return NULL;
+	}
+
+	pdo_id = pd_add(di, output_type, proto_id);
+	if (pdo_id < 0)
+		Py_RETURN_NONE;
+	else
+		ret = Py_BuildValue("i", pdo_id);
+
+	return ret;
+}
+
+static PyMethodDef Decoder_methods[] = {
+	{"put", Decoder_put, METH_VARARGS,
+	 "Accepts a dictionary with the following keys: time, duration, data"},
+	{"add", Decoder_add, METH_VARARGS, "Create a new output stream"},
+	{NULL, NULL, 0, NULL}
+};
+
+
+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,
+};
+