[libsigrokdecode.git] / type_decoder.c

/*
 * This file is part of the libsigrokdecode 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 "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
#include "libsigrokdecode-internal.h"
#include "config.h"
#include <inttypes.h>

/* This is only used for nicer srd_dbg() output. */
static const char *OUTPUT_TYPES[] = {
	"OUTPUT_ANN",
	"OUTPUT_PYTHON",
	"OUTPUT_BINARY",
};

static int convert_annotation(struct srd_decoder_inst *di, PyObject *obj,
		struct srd_proto_data *pdata)
{
	PyObject *py_tmp;
	struct srd_pd_output *pdo;
	struct srd_proto_data_annotation *pda;
	int ann_format;
	char **ann_text;

	/* 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;
	}

	/*
	 * The 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_format = PyLong_AsLong(py_tmp);
	if (!(pdo = g_slist_nth_data(di->decoder->annotations, ann_format))) {
		srd_err("Protocol decoder %s submitted data to unregistered "
			"annotation format %d.", di->decoder->name, ann_format);
		return SRD_ERR_PYTHON;
	}

	/* 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_text) != SRD_OK) {
		srd_err("Protocol decoder %s submitted annotation list, but "
			"second element was malformed.", di->decoder->name);
		return SRD_ERR_PYTHON;
	}

	if (!(pda = g_try_malloc(sizeof(struct srd_proto_data_annotation))))
		return SRD_ERR_MALLOC;
	pda->ann_format = ann_format;
	pda->ann_text = ann_text;
	pdata->data = pda;

	return SRD_OK;
}

static PyObject *Decoder_put(PyObject *self, PyObject *args)
{
	GSList *l;
	PyObject *py_data, *py_res;
	struct srd_decoder_inst *di, *next_di;
	struct srd_pd_output *pdo;
	struct srd_proto_data *pdata;
	uint64_t start_sample, end_sample;
	int output_id;
	struct srd_pd_callback *cb;

	if (!(di = srd_inst_find_by_obj(NULL, self))) {
		/* Shouldn't happen. */
		srd_dbg("put(): self instance not found.");
		return NULL;
	}

	if (!PyArg_ParseTuple(args, "KKiO", &start_sample, &end_sample,
	    &output_id, &py_data)) {
		/*
		 * This throws an exception, but by returning NULL here we let
		 * Python raise it. This results in a much better trace in
		 * controller.c on the decode() method call.
		 */
		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;

	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);

	if (!(pdata = g_try_malloc0(sizeof(struct srd_proto_data)))) {
		srd_err("Failed to g_malloc() 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_pd_output_callback_find(di->sess, pdo->output_type))) {
			/* Annotations need converting from PyObject. */
			if (convert_annotation(di, py_data, pdata) != SRD_OK) {
				/* An error was already logged. */
				break;
			}
			cb->cb(pdata, cb->cb_data);
		}
		break;
	case SRD_OUTPUT_PYTHON:
		for (l = di->next_di; l; l = l->next) {
			next_di = l->data;
			/* TODO: Is this needed? */
			Py_XINCREF(next_di->py_inst);
			srd_spew("Sending %d-%d to instance %s",
				 start_sample, end_sample,
				 next_di->inst_id);
			if (!(py_res = PyObject_CallMethod(
			    next_di->py_inst, "decode", "KKO", start_sample,
			    end_sample, py_data))) {
				srd_exception_catch("Calling %s decode(): ",
						    next_di->inst_id);
			}
			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_inst *di;
	char *proto_id;
	int output_type, pdo_id;

	if (!(di = srd_inst_find_by_obj(NULL, self))) {
		PyErr_SetString(PyExc_Exception, "decoder instance not found");
		return NULL;
	}

	if (!PyArg_ParseTuple(args, "is", &output_type, &proto_id)) {
		/* Let Python raise this exception. */
		return NULL;
	}

	pdo_id = srd_inst_pd_output_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: startsample, endsample, data"},
	{"add", Decoder_add, METH_VARARGS, "Create a new output stream"},
	{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 */
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrokdecode project.
	3	*
	4	* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include "libsigrokdecode.h" /* First, so we avoid a _POSIX_C_SOURCE warning. */
	21	#include "libsigrokdecode-internal.h"
	22	#include "config.h"
	23	#include <inttypes.h>
	24
	25	/* This is only used for nicer srd_dbg() output. */
	26	static const char *OUTPUT_TYPES[] = {
	27	"OUTPUT_ANN",
	28	"OUTPUT_PYTHON",
	29	"OUTPUT_BINARY",
	30	};
	31
	32	static int convert_annotation(struct srd_decoder_inst di, PyObject obj,
	33	struct srd_proto_data *pdata)
	34	{
	35	PyObject *py_tmp;
	36	struct srd_pd_output *pdo;
	37	struct srd_proto_data_annotation *pda;
	38	int ann_format;
	39	char **ann_text;
	40
	41	/* Should be a list of [annotation format, [string, ...]]. */
	42	if (!PyList_Check(obj) && !PyTuple_Check(obj)) {
	43	srd_err("Protocol decoder %s submitted %s instead of list.",
	44	di->decoder->name, obj->ob_type->tp_name);
	45	return SRD_ERR_PYTHON;
	46	}
	47
	48	/* Should have 2 elements. */
	49	if (PyList_Size(obj) != 2) {
	50	srd_err("Protocol decoder %s submitted annotation list with "
	51	"%d elements instead of 2", di->decoder->name,
	52	PyList_Size(obj));
	53	return SRD_ERR_PYTHON;
	54	}
	55
	56	/*
	57	* The first element should be an integer matching a previously
	58	* registered annotation format.
	59	*/
	60	py_tmp = PyList_GetItem(obj, 0);
	61	if (!PyLong_Check(py_tmp)) {
	62	srd_err("Protocol decoder %s submitted annotation list, but "
	63	"first element was not an integer.", di->decoder->name);
	64	return SRD_ERR_PYTHON;
	65	}
	66	ann_format = PyLong_AsLong(py_tmp);
	67	if (!(pdo = g_slist_nth_data(di->decoder->annotations, ann_format))) {
	68	srd_err("Protocol decoder %s submitted data to unregistered "
	69	"annotation format %d.", di->decoder->name, ann_format);
	70	return SRD_ERR_PYTHON;
	71	}
	72
	73	/* Second element must be a list. */
	74	py_tmp = PyList_GetItem(obj, 1);
	75	if (!PyList_Check(py_tmp)) {
	76	srd_err("Protocol decoder %s submitted annotation list, but "
	77	"second element was not a list.", di->decoder->name);
	78	return SRD_ERR_PYTHON;
	79	}
	80	if (py_strlist_to_char(py_tmp, &ann_text) != SRD_OK) {
	81	srd_err("Protocol decoder %s submitted annotation list, but "
	82	"second element was malformed.", di->decoder->name);
	83	return SRD_ERR_PYTHON;
	84	}
	85
	86	if (!(pda = g_try_malloc(sizeof(struct srd_proto_data_annotation))))
	87	return SRD_ERR_MALLOC;
	88	pda->ann_format = ann_format;
	89	pda->ann_text = ann_text;
	90	pdata->data = pda;
	91
	92	return SRD_OK;
	93	}
	94
	95	static PyObject Decoder_put(PyObject self, PyObject *args)
	96	{
	97	GSList *l;
	98	PyObject py_data, py_res;
	99	struct srd_decoder_inst di, next_di;
	100	struct srd_pd_output *pdo;
	101	struct srd_proto_data *pdata;
	102	uint64_t start_sample, end_sample;
	103	int output_id;
	104	struct srd_pd_callback *cb;
	105
	106	if (!(di = srd_inst_find_by_obj(NULL, self))) {
	107	/* Shouldn't happen. */
	108	srd_dbg("put(): self instance not found.");
	109	return NULL;
	110	}
	111
	112	if (!PyArg_ParseTuple(args, "KKiO", &start_sample, &end_sample,
	113	&output_id, &py_data)) {
	114	/*
	115	* This throws an exception, but by returning NULL here we let
	116	* Python raise it. This results in a much better trace in
	117	* controller.c on the decode() method call.
	118	*/
	119	return NULL;
	120	}
	121
	122	if (!(l = g_slist_nth(di->pd_output, output_id))) {
	123	srd_err("Protocol decoder %s submitted invalid output ID %d.",
	124	di->decoder->name, output_id);
	125	return NULL;
	126	}
	127	pdo = l->data;
	128
	129	srd_spew("Instance %s put %" PRIu64 "-%" PRIu64 " %s on oid %d.",
	130	di->inst_id, start_sample, end_sample,
	131	OUTPUT_TYPES[pdo->output_type], output_id);
	132
	133	if (!(pdata = g_try_malloc0(sizeof(struct srd_proto_data)))) {
	134	srd_err("Failed to g_malloc() struct srd_proto_data.");
	135	return NULL;
	136	}
	137	pdata->start_sample = start_sample;
	138	pdata->end_sample = end_sample;
	139	pdata->pdo = pdo;
	140
	141	switch (pdo->output_type) {
	142	case SRD_OUTPUT_ANN:
	143	/* Annotations are only fed to callbacks. */
	144	if ((cb = srd_pd_output_callback_find(di->sess, pdo->output_type))) {
	145	/* Annotations need converting from PyObject. */
	146	if (convert_annotation(di, py_data, pdata) != SRD_OK) {
	147	/* An error was already logged. */
	148	break;
	149	}
	150	cb->cb(pdata, cb->cb_data);
	151	}
	152	break;
	153	case SRD_OUTPUT_PYTHON:
	154	for (l = di->next_di; l; l = l->next) {
	155	next_di = l->data;
	156	/* TODO: Is this needed? */
	157	Py_XINCREF(next_di->py_inst);
	158	srd_spew("Sending %d-%d to instance %s",
	159	start_sample, end_sample,
	160	next_di->inst_id);
	161	if (!(py_res = PyObject_CallMethod(
	162	next_di->py_inst, "decode", "KKO", start_sample,
	163	end_sample, py_data))) {
	164	srd_exception_catch("Calling %s decode(): ",
	165	next_di->inst_id);
	166	}
	167	Py_XDECREF(py_res);
	168	}
	169	break;
	170	case SRD_OUTPUT_BINARY:
	171	srd_err("SRD_OUTPUT_BINARY not yet supported.");
	172	break;
	173	default:
	174	srd_err("Protocol decoder %s submitted invalid output type %d.",
	175	di->decoder->name, pdo->output_type);
	176	break;
	177	}
	178
	179	g_free(pdata);
	180
	181	Py_RETURN_NONE;
	182	}
	183
	184	static PyObject Decoder_add(PyObject self, PyObject *args)
	185	{
	186	PyObject *ret;
	187	struct srd_decoder_inst *di;
	188	char *proto_id;
	189	int output_type, pdo_id;
	190
	191	if (!(di = srd_inst_find_by_obj(NULL, self))) {
	192	PyErr_SetString(PyExc_Exception, "decoder instance not found");
	193	return NULL;
	194	}
	195
	196	if (!PyArg_ParseTuple(args, "is", &output_type, &proto_id)) {
	197	/* Let Python raise this exception. */
	198	return NULL;
	199	}
	200
	201	pdo_id = srd_inst_pd_output_add(di, output_type, proto_id);
	202	if (pdo_id < 0)
	203	Py_RETURN_NONE;
	204	else
	205	ret = Py_BuildValue("i", pdo_id);
	206
	207	return ret;
	208	}
	209
	210	static PyMethodDef Decoder_methods[] = {
	211	{"put", Decoder_put, METH_VARARGS,
	212	"Accepts a dictionary with the following keys: startsample, endsample, data"},
	213	{"add", Decoder_add, METH_VARARGS, "Create a new output stream"},
	214	{NULL, NULL, 0, NULL}
	215	};
	216
	217	/** @cond PRIVATE */
	218	SRD_PRIV PyTypeObject srd_Decoder_type = {
	219	PyVarObject_HEAD_INIT(NULL, 0)
	220	.tp_name = "sigrokdecode.Decoder",
	221	.tp_basicsize = sizeof(srd_Decoder),
	222	.tp_flags = Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_BASETYPE,
	223	.tp_doc = "sigrok Decoder base class",
	224	.tp_methods = Decoder_methods,
	225	};
	226	/** @endcond */